diff --git a/.gitignore b/.gitignore
index ea2af581..d22fa043 100644
--- a/.gitignore
+++ b/.gitignore
@@ -110,4 +110,10 @@ venv.bak/
 .pyre/
 
 # User Definition
-data/
\ No newline at end of file
+data/
+deprecated/
+tmp*/
+jieba.cache
+*.kv
+*.zip
+examples/test_model
\ No newline at end of file
diff --git a/AUTHORS.md b/AUTHORS.md
index df16f050..f1a9fafc 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -18,5 +18,7 @@
 
 [Yuting Ning](https://github.com/nnnyt)
 
+[Jundong Wu](https://github.com/wintermelon008)
+
 
 The stared contributors are the corresponding authors. 
diff --git a/CHANGE.txt b/CHANGE.txt
index 66162032..17e33497 100644
--- a/CHANGE.txt
+++ b/CHANGE.txt
@@ -1,3 +1,12 @@
+v0.0.9
+    1. Refactor tokenizer Basic Tokenizer and Pretrained Tokenizer
+    2. Refactor model structures following huggingface styles for Elmo, BERT, DisenQNet and QuesNet
+    3. Add PreprocessingPipeline and Pipeline
+    4. Add downstream task: knowledge prediction and property prediction
+    5. Fix a bug in RNN which causes ELMo not converging
+    6. Move all the test models to modelhub
+    7. Update test data files
+
 v0.0.8
     1. add Emlo
     2. add DisenQNet
diff --git a/EduNLP/I2V/i2v.py b/EduNLP/I2V/i2v.py
index a70a34f7..720b0eff 100644
--- a/EduNLP/I2V/i2v.py
+++ b/EduNLP/I2V/i2v.py
@@ -3,16 +3,16 @@
 
 import json
 import os.path
-
+from typing import List, Tuple
 from EduNLP.constant import MODEL_DIR
 from ..Vector import T2V, get_pretrained_t2v as get_t2v_pretrained_model
 from ..Vector import get_pretrained_model_info, get_all_pretrained_models
 from longling import path_append
+from EduData import get_data
 from ..Tokenizer import Tokenizer, get_tokenizer
 from EduNLP.Pretrain import ElmoTokenizer, BertTokenizer, DisenQTokenizer, QuesNetTokenizer, Question
 from EduNLP import logger
 
-
 __all__ = ["I2V", "D2V", "W2V", "Elmo", "Bert", "DisenQ", "QuesNet", "get_pretrained_i2v"]
 
 
@@ -24,7 +24,7 @@ class I2V(object):
     Parameters
     -----------
     tokenizer: str
-        the tokenizer name
+        the name of tokenizer. eg. bert, pure_text, ...
     t2v: str
         the name of token2vector model
     args:
@@ -34,6 +34,8 @@ class I2V(object):
     pretrained_t2v: bool
         - True: use pretrained t2v model
         - False: use your own t2v model
+    model_dir: str
+        local directionary for saving online pretrained models, work only when `pretrained_t2v=True`
     kwargs:
         the parameters passed to t2v
 
@@ -42,8 +44,12 @@ class I2V(object):
     >>> item = {"如图来自古希腊数学家希波克拉底所研究的几何图形．此图由三个半圆构成，三个半圆的直径分别为直角三角形$ABC$的斜边$BC$, \
     ... 直角边$AB$, $AC$.$\\bigtriangleup ABC$的三边所围成的区域记为$I$,黑色部分记为$II$, 其余部分记为$III$.在整个图形中随机取一点，\
     ... 此点取自$I,II,III$的概率分别记为$p_1,p_2,p_3$,则$\\SIFChoice$$\\FigureID{1}$"}
-    >>> model_path = "examples/test_model/d2v/test_gensim_luna_stem_tf_d2v_256.bin"
-    >>> i2v = D2V("text","d2v",filepath=model_path, pretrained_t2v = False)
+    >>> model_dir = "examples/test_model/d2v"
+    >>> url, model_name, *args = get_pretrained_model_info('d2v_test_256')
+    >>> (); path = get_data(url, model_dir); () # doctest: +ELLIPSIS
+    (...)
+    >>> path = path_append(path, os.path.basename(path) + '.bin', to_str=True)
+    >>> i2v = D2V("pure_text", "d2v", filepath=path, pretrained_t2v=False)
     >>> i2v(item)
     ([array([ ...dtype=float32)], None)
 
@@ -52,21 +58,25 @@ class I2V(object):
     i2v model: I2V
     """
 
-    def __init__(self, tokenizer, t2v, *args, tokenizer_kwargs: dict = None, pretrained_t2v=False, **kwargs):
+    def __init__(self, tokenizer, t2v, *args, tokenizer_kwargs: dict = None,
+                 pretrained_t2v=False, model_dir=MODEL_DIR, **kwargs):
         if pretrained_t2v:
             logger.info("Use pretrained t2v model %s" % t2v)
-            self.t2v = get_t2v_pretrained_model(t2v, kwargs.get("model_dir", MODEL_DIR))
+            self.t2v = get_t2v_pretrained_model(t2v, model_dir)
         else:
             self.t2v = T2V(t2v, *args, **kwargs)
         if tokenizer == 'bert':
-            self.tokenizer = BertTokenizer.from_pretrained(**tokenizer_kwargs if tokenizer_kwargs is not None else {})
+            self.tokenizer = BertTokenizer.from_pretrained(
+                **tokenizer_kwargs if tokenizer_kwargs is not None else {})
         elif tokenizer == 'quesnet':
             self.tokenizer = QuesNetTokenizer.from_pretrained(
                 **tokenizer_kwargs if tokenizer_kwargs is not None else {})
         elif tokenizer == 'elmo':
-            self.tokenizer = ElmoTokenizer(**tokenizer_kwargs if tokenizer_kwargs is not None else {})
+            self.tokenizer = ElmoTokenizer.from_pretrained(
+                **tokenizer_kwargs if tokenizer_kwargs is not None else {})
         elif tokenizer == 'disenq':
-            self.tokenizer = DisenQTokenizer.from_pretrained(**tokenizer_kwargs if tokenizer_kwargs is not None else {})
+            self.tokenizer = DisenQTokenizer.from_pretrained(
+                **tokenizer_kwargs if tokenizer_kwargs is not None else {})
         else:
             self.tokenizer: Tokenizer = get_tokenizer(tokenizer,
                                                       **tokenizer_kwargs if tokenizer_kwargs is not None else {})
@@ -83,12 +93,11 @@ def __call__(self, items, *args, **kwargs):
         """transfer item to vector"""
         return self.infer_vector(items, *args, **kwargs)
 
-    def tokenize(self, items, *args, indexing=True, padding=False, key=lambda x: x, **kwargs) -> list:
+    def tokenize(self, items, *args, key=lambda x: x, **kwargs) -> list:
         # """tokenize item"""
         return self.tokenizer(items, *args, key=key, **kwargs)
 
-    def infer_vector(self, items, tokenize=True, indexing=False, padding=False, key=lambda x: x,
-                     **kwargs) -> tuple:
+    def infer_vector(self, items, key=lambda x: x, **kwargs) -> tuple:
         raise NotImplementedError
 
     def infer_item_vector(self, tokens, *args, **kwargs) -> ...:
@@ -107,10 +116,10 @@ def load(cls, config_path, *args, **kwargs):
             params: dict = json.load(f)
             tokenizer = params.pop("tokenizer")
             t2v = params.pop("t2v")
-            args = params.pop("args")
-            kwargs = params.pop("kwargs")
-            params.update(kwargs)
-            return cls(tokenizer, t2v, *args, **params)
+            _args = params.pop("args")
+            _kwargs = params.pop("kwargs")
+            params.update(_kwargs)
+            return cls(tokenizer, t2v, *_args, **params)
 
     @classmethod
     def from_pretrained(cls, name, model_dir=MODEL_DIR, *args, **kwargs):
@@ -150,8 +159,12 @@ class D2V(I2V):
     >>> item = {"如图来自古希腊数学家希波克拉底所研究的几何图形．此图由三个半圆构成，三个半圆的直径分别为直角三角形$ABC$的斜边$BC$, \
     ... 直角边$AB$, $AC$.$\\bigtriangleup ABC$的三边所围成的区域记为$I$,黑色部分记为$II$, 其余部分记为$III$.在整个图形中随机取一点，\
     ... 此点取自$I,II,III$的概率分别记为$p_1,p_2,p_3$,则$\\SIFChoice$$\\FigureID{1}$"}
-    >>> model_path = "examples/test_model/d2v/d2v_test_256/d2v_test_256.bin"
-    >>> i2v = D2V("text","d2v",filepath=model_path, pretrained_t2v = False)
+    >>> model_dir = "examples/test_model/d2v"
+    >>> url, model_name, *args = get_pretrained_model_info('d2v_test_256')
+    >>> (); path = get_data(url, model_dir); () # doctest: +ELLIPSIS
+    (...)
+    >>> path = path_append(path, os.path.basename(path) + '.bin', to_str=True)
+    >>> i2v = D2V("pure_text","d2v",filepath=path, pretrained_t2v = False)
     >>> i2v(item)
     ([array([ ...dtype=float32)], None)
 
@@ -160,21 +173,19 @@ class D2V(I2V):
     i2v model: I2V
     """
 
-    def infer_vector(self, items, tokenize=True, indexing=False, padding=False, key=lambda x: x, *args,
+    def infer_vector(self, items, tokenize=True, key=lambda x: x, *args,
                      **kwargs) -> tuple:
-        '''
+        """
         It is a function to switch item to vector. And before using the function, it is necessary to load model.
 
         Parameters
         -----------
         items:str
             the text of question
-        tokenize:bool
+        tokenize: bool
             True: tokenize the item
-        indexing:bool
-        padding:bool
-        key: lambda function
-            the parameter passed to tokenizer, select the text to be processed
+        key: function
+            determine how to get the text of each item
         args:
             the parameters passed to t2v
         kwargs:
@@ -183,8 +194,8 @@ def infer_vector(self, items, tokenize=True, indexing=False, padding=False, key=
         Returns
         --------
         vector:list
-        '''
-        tokens = self.tokenize(items, return_token=True, key=key) if tokenize is True else items
+        """
+        tokens = self.tokenize(items, key=key) if tokenize is True else items
         tokens = [token for token in tokens]
         return self.t2v(tokens, *args, **kwargs), None
 
@@ -219,10 +230,10 @@ class W2V(I2V):
 
     Examples
     ---------
-    >>> (); i2v = get_pretrained_i2v("w2v_test_256", "examples/test_model/w2v"); () # doctest: +ELLIPSIS
+    >>> (); i2v = get_pretrained_i2v("w2v_test_256", "examples/test_model/w2v"); () # doctest: +SKIP
     (...)
-    >>> item_vector, token_vector = i2v(["有学者认为：‘学习’，必须适应实际"])
-    >>> item_vector # doctest: +ELLIPSIS
+    >>> item_vector, token_vector = i2v(["有学者认为：‘学习’，必须适应实际"]) # doctest: +SKIP
+    >>> item_vector # doctest: +SKIP
     [array([...], dtype=float32)]
 
     Returns
@@ -231,7 +242,7 @@ class W2V(I2V):
 
     """
 
-    def infer_vector(self, items, tokenize=True, indexing=False, padding=False, key=lambda x: x, *args,
+    def infer_vector(self, items, tokenize=True, key=lambda x: x, *args,
                      **kwargs) -> tuple:
         '''
         It is a function to switch item to vector. And before using the function, it is necessary to load model.
@@ -242,10 +253,8 @@ def infer_vector(self, items, tokenize=True, indexing=False, padding=False, key=
             the text of question
         tokenize:bool
             True: tokenize the item
-        indexing:bool
-        padding:bool
-        key: lambda function
-            the parameter passed to tokenizer, select the text to be processed
+        key: function
+            determine how to get the text of each item
         args:
             the parameters passed to t2v
         kwargs:
@@ -255,7 +264,7 @@ def infer_vector(self, items, tokenize=True, indexing=False, padding=False, key=
         --------
         vector:list
         '''
-        tokens = self.tokenize(items, return_token=True) if tokenize is True else items
+        tokens = self.tokenize(items) if tokenize is True else items
         tokens = [token for token in tokens]
         return self.t2v(tokens, *args, **kwargs), self.t2v.infer_tokens(tokens, *args, **kwargs)
 
@@ -292,15 +301,15 @@ class Elmo(I2V):
     -------
     i2v model: Elmo
     """
-    def infer_vector(self, items, tokenize=True, return_tensors='pt', *args, **kwargs) -> tuple:
+
+    def infer_vector(self, items: Tuple[List[str], List[dict], str, dict],
+                     *args, key=lambda x: x, **kwargs) -> tuple:
         """It is a function to switch item to vector. And before using the function, it is necessary to load model.
 
         Parameters
         -----------
-        items: str or list
-            the text of question
-        tokenize:bool
-            True: tokenize the item
+        items : str or dict or list
+            the item of question, or question list
         return_tensors: str
             tensor type used in tokenizer
         args:
@@ -312,24 +321,10 @@ def infer_vector(self, items, tokenize=True, return_tensors='pt', *args, **kwarg
         --------
         vector: list
         """
-        is_batch = (tokenize and isinstance(items, list)) or (not tokenize and isinstance(items[0], list))
-        if tokenize:
-            tokens, lengths = self.tokenize(items, freeze_vocab=True, return_tensors=return_tensors,
-                                            pad_to_max_length=True)
-        else:
-            tokens = []
-            lengths = [len(i) for i in tokens] if is_batch else len(tokens)
-        if is_batch:
-            return self.t2v.infer_vector(
-                tokens, lengths=lengths, *args, **kwargs), self.t2v.infer_tokens(tokens,
-                                                                                 lengths=lengths, *args, **kwargs)
-        else:
-            tokens = [tokens]
-            lengths = [lengths]
-            i_v, i_t = self.t2v.infer_vector(
-                tokens, lengths=lengths, *args, **kwargs), self.t2v.infer_tokens(tokens,
-                                                                                 lengths=lengths, *args, **kwargs)
-            return i_v[0], i_t[0]
+        is_batch = isinstance(items, list)
+        items = items if is_batch else [items]
+        inputs = self.tokenize(items, key=key)
+        return self.t2v.infer_vector(inputs, *args, **kwargs), self.t2v.infer_tokens(inputs, *args, **kwargs)
 
     @classmethod
     def from_pretrained(cls, name, model_dir=MODEL_DIR, *args, **kwargs):
@@ -337,7 +332,7 @@ def from_pretrained(cls, name, model_dir=MODEL_DIR, *args, **kwargs):
         for i in [".tar.gz", ".tar.bz2", ".tar.bz", ".tar.tgz", ".tar", ".tgz", ".zip", ".rar"]:
             model_path = model_path.replace(i, "")
         logger.info("model_path: %s" % model_path)
-        tokenizer_kwargs = {"path": os.path.join(model_path, "vocab.json")}
+        tokenizer_kwargs = {"tokenizer_config_dir": model_path}
         return cls("elmo", name, pretrained_t2v=True, model_dir=model_dir,
                    tokenizer_kwargs=tokenizer_kwargs)
 
@@ -371,16 +366,15 @@ class Bert(I2V):
     i2v model: Bert
     """
 
-    def infer_vector(self, items, tokenize=True, return_tensors='pt', *args, **kwargs) -> tuple:
+    def infer_vector(self, items: Tuple[List[str], List[dict], str, dict],
+                     *args, key=lambda x: x, return_tensors='pt', **kwargs) -> tuple:
         """
         It is a function to switch item to vector. And before using the function, it is nesseary to load model.
 
         Parameters
         -----------
-        items: str or list
-            the text of question
-        tokenize:bool
-            True: tokenize the item
+        items : str or dict or list
+            the item of question, or question list
         return_tensors: str
             tensor type used in tokenizer
         args:
@@ -392,8 +386,8 @@ def infer_vector(self, items, tokenize=True, return_tensors='pt', *args, **kwarg
         --------
         vector:list
         """
-        inputs = self.tokenize(items, return_tensors=return_tensors) if tokenize is True else items
-        return self.t2v(inputs, *args, **kwargs), self.t2v.infer_tokens(inputs, *args, **kwargs)
+        inputs = self.tokenize(items, key=key, return_tensors=return_tensors)
+        return self.t2v.infer_vector(inputs, *args, **kwargs), self.t2v.infer_tokens(inputs, *args, **kwargs)
 
     @classmethod
     def from_pretrained(cls, name, model_dir=MODEL_DIR, *args, **kwargs):
@@ -401,7 +395,6 @@ def from_pretrained(cls, name, model_dir=MODEL_DIR, *args, **kwargs):
         for i in [".tar.gz", ".tar.bz2", ".tar.bz", ".tar.tgz", ".tar", ".tgz", ".zip", ".rar"]:
             model_path = model_path.replace(i, "")
         logger.info("model_path: %s" % model_path)
-        tokenizer_kwargs = {"pretrain_model": model_path}
         tokenizer_kwargs = {"tokenizer_config_dir": model_path}
         return cls("bert", name, pretrained_t2v=True, model_dir=model_dir,
                    tokenizer_kwargs=tokenizer_kwargs)
@@ -432,18 +425,17 @@ class DisenQ(I2V):
     -------
     i2v model: DisenQ
     """
-    def infer_vector(self, items: (dict, list), tokenize=True,
-                     key=lambda x: x, vector_type=None, **kwargs) -> tuple:
+
+    def infer_vector(self, items: Tuple[List[str], List[dict], str, dict],
+                     *args, key=lambda x: x, vector_type=None, **kwargs) -> tuple:
         """
         It is a function to switch item to vector. And before using the function, it is nesseary to load model.
         Parameters
         -----------
-        item: dict or list
-            the item of question
-        tokenize: bool
-            True: tokenize the item
-        key: lambda function
-            the parameter passed to tokenizer, select the text to be processed
+        items : str or dict or list
+            the item of question, or question list
+        key: function
+            determine how to get the text of each item
         args:
             the parameters passed to t2v
         kwargs:
@@ -452,7 +444,9 @@ def infer_vector(self, items: (dict, list), tokenize=True,
         --------
         vector:list
         """
-        inputs = self.tokenize(items, key=key, **kwargs) if tokenize is True else items
+        is_batch = isinstance(items, list)
+        items = items if is_batch else [items]
+        inputs = self.tokenize(items, key=key, **kwargs)
         i_vec = self.t2v.infer_vector(inputs, vector_type=vector_type, **kwargs)
         t_vec = self.t2v.infer_tokens(inputs, **kwargs)
         return i_vec, t_vec
@@ -479,16 +473,17 @@ class QuesNet(I2V):
     I2V
     """
 
-    def infer_vector(self, item, tokenize=True, key=lambda x: x, meta=['know_name'], *args, **kwargs):
+    def infer_vector(self, items: Tuple[List[str], List[dict], str, dict],
+                     *args, key=lambda x: x, meta=['know_name'], **kwargs):
         """ It is a function to switch item to vector. And before using the function, it is nesseary to load model.
         Parameters
         ----------
-        item : str or dict or list
+        items : str or dict or list
             the item of question, or question list
         tokenize : bool, optional
             True: tokenize the item
-        key : _type_, optional
-            _description_, by default lambdax:x
+        key : function, optional
+            determine how to get the text of each item, by default lambdax: x
         meta : list, optional
             meta information, by default ['know_name']
         args:
@@ -500,14 +495,8 @@ def infer_vector(self, item, tokenize=True, key=lambda x: x, meta=['know_name'],
         token embeddings
         question embedding
         """
-        input = self.tokenize(item, key=key, meta=meta, *args, **kwargs) if tokenize is True else item
-        content = input['content_idx']
-        meta_idx = input['meta_idx']
-        if isinstance(item, list):
-            qs = [Question("", content[i], [0], [[0], [0], [0]], meta_idx[i]) for i in range(len(item))]
-        else:
-            qs = Question("", content, [0], [[0], [0], [0]], meta_idx)
-        return self.t2v.infer_vector(qs), self.t2v.infer_tokens(qs)
+        encodes = self.tokenize(items, key=key, meta=meta, *args, **kwargs)
+        return self.t2v.infer_vector(encodes), self.t2v.infer_tokens(encodes)
 
     @classmethod
     def from_pretrained(cls, name, model_dir=MODEL_DIR, *args, **kwargs):
@@ -559,15 +548,15 @@ def get_pretrained_i2v(name, model_dir=MODEL_DIR):
     >>> item = {"如图来自古希腊数学家希波克拉底所研究的几何图形．此图由三个半圆构成，三个半圆的直径分别为直角三角形$ABC$的斜边$BC$, \
     ... 直角边$AB$, $AC$.$\\bigtriangleup ABC$的三边所围成的区域记为$I$,黑色部分记为$II$, 其余部分记为$III$.在整个图形中随机取一点，\
     ... 此点取自$I,II,III$的概率分别记为$p_1,p_2,p_3$,则$\\SIFChoice$$\\FigureID{1}$"}
-    >>> (); i2v = get_pretrained_i2v("d2v_test_256", "examples/test_model/d2v"); () # doctest: +ELLIPSIS
+    >>> (); i2v = get_pretrained_i2v("d2v_test_256", "examples/test_model/d2v"); () # doctest: +SKIP
     (...)
-    >>> print(i2v(item))
+    >>> print(i2v(item)) # doctest: +SKIP
     ([array([ ...dtype=float32)], None)
     """
-    pretraind_models = get_all_pretrained_models()
-    if name not in pretraind_models:
+    pretrained_models = get_all_pretrained_models()
+    if name not in pretrained_models:
         raise KeyError(
-            "Unknown model name %s, use one of the provided models: %s" % (name, ", ".join(pretraind_models))
+            "Unknown model name %s, use one of the provided models: %s" % (name, ", ".join(pretrained_models))
         )
     _, t2v = get_pretrained_model_info(name)
     _class, *params = MODEL_MAP[t2v], name
diff --git a/EduNLP/ModelZoo/__init__.py b/EduNLP/ModelZoo/__init__.py
index 5dbf8ed1..c4607475 100644
--- a/EduNLP/ModelZoo/__init__.py
+++ b/EduNLP/ModelZoo/__init__.py
@@ -1,4 +1,3 @@
-# coding: utf-8
-# 2021/7/12 @ tongshiwei
-
 from .utils import *
+from .bert import *
+from .rnn import *
diff --git a/EduNLP/ModelZoo/base_model.py b/EduNLP/ModelZoo/base_model.py
new file mode 100644
index 00000000..a7ee418e
--- /dev/null
+++ b/EduNLP/ModelZoo/base_model.py
@@ -0,0 +1,88 @@
+import torch.nn as nn
+import json
+import os
+from pathlib import Path
+import torch
+from transformers import PretrainedConfig
+# import logging
+from ..utils import logger
+
+
+class BaseModel(nn.Module):
+    base_model_prefix = ''
+
+    def __init__(self):
+        super(BaseModel, self).__init__()
+        self.config = PretrainedConfig()
+
+    def forward(self, *input):
+        raise NotImplementedError
+
+    def save_pretrained(self, output_dir):
+        if not os.path.exists(output_dir):
+            os.makedirs(output_dir, exist_ok=True)
+        model_path = os.path.join(output_dir, 'pytorch_model.bin')
+        model_path = Path(model_path)
+        torch.save(self.state_dict(), model_path.open('wb'))
+        self.save_config(output_dir)
+
+    @classmethod
+    def from_pretrained(cls, pretrained_model_path, *args, **kwargs):
+        config_path = os.path.join(pretrained_model_path, "config.json")
+        model_path = os.path.join(pretrained_model_path, "pytorch_model.bin")
+        model = cls.from_config(config_path, *args, **kwargs)
+        loaded_state_dict = torch.load(model_path)
+        loaded_keys = loaded_state_dict.keys()
+        expected_keys = model.state_dict().keys()
+
+        prefix = cls.base_model_prefix
+
+        if set(loaded_keys) == set(expected_keys):
+            # same architecture
+            model.load_state_dict(loaded_state_dict)
+        else:
+            has_prefix_module = any(s.startswith(prefix) for s in loaded_keys)
+            expects_prefix_module = any(s.startswith(prefix) for s in expected_keys)
+
+            new_loaded_state_dict = {}
+            if expects_prefix_module and not has_prefix_module:
+                # add prefix
+                for key in loaded_keys:
+                    new_loaded_state_dict['.'.join([prefix, key])] = loaded_state_dict[key]
+            if has_prefix_module and not expects_prefix_module:
+                # remove prefix
+                for key in loaded_keys:
+                    if key.startswith(prefix):
+                        new_loaded_state_dict['.'.join(key.split('.')[1:])] = loaded_state_dict[key]
+            if has_prefix_module and expects_prefix_module:
+                # both have prefix, only load the base encoder
+                for key in loaded_keys:
+                    if key.startswith(prefix):
+                        new_loaded_state_dict[key] = loaded_state_dict[key]
+            loaded_state_dict = new_loaded_state_dict
+            model.load_state_dict(loaded_state_dict, strict=False)
+        loaded_keys = loaded_state_dict.keys()
+        missing_keys = set(expected_keys) - set(loaded_keys)
+        if len(missing_keys) == 0:
+            logger.info(
+                f"All the weights of {model.__class__.__name__} were initialized from the model checkpoint at"
+                f" {pretrained_model_path}.\nIf your task is similar to the task the model of the checkpoint"
+                f" was trained on, you can already use {model.__class__.__name__} for predictions without further"
+                " training."
+            )
+        elif len(missing_keys) > 0:
+            logger.warning(
+                f"Some weights of {model.__class__.__name__} were not initialized from the model checkpoint at"
+                f" {pretrained_model_path} and are newly initialized: {missing_keys}\nYou should probably"
+                " TRAIN this model on a down-stream task to be able to use it for predictions and inference."
+            )
+        return model
+
+    def save_config(self, config_dir):
+        config_path = os.path.join(config_dir, "config.json")
+        with open(config_path, "w", encoding="utf-8") as wf:
+            json.dump(self.config.to_dict(), wf, ensure_ascii=False, indent=2)
+
+    @classmethod
+    def from_config(cls, config_path, *args, **kwargs):
+        raise NotImplementedError
diff --git a/EduNLP/ModelZoo/bert/__init__.py b/EduNLP/ModelZoo/bert/__init__.py
new file mode 100644
index 00000000..dbd2a17d
--- /dev/null
+++ b/EduNLP/ModelZoo/bert/__init__.py
@@ -0,0 +1 @@
+from .bert import *
diff --git a/EduNLP/ModelZoo/bert/bert.py b/EduNLP/ModelZoo/bert/bert.py
new file mode 100644
index 00000000..2e86a72d
--- /dev/null
+++ b/EduNLP/ModelZoo/bert/bert.py
@@ -0,0 +1,151 @@
+import torch
+from torch import nn
+from torch.nn.utils.rnn import pad_packed_sequence, pack_padded_sequence
+from baize.torch import load_net
+import torch.nn.functional as F
+import json
+import os
+from ..base_model import BaseModel
+from transformers.modeling_outputs import ModelOutput
+from transformers import BertModel, PretrainedConfig
+from typing import List, Optional
+from ..rnn.harnn import HAM
+
+__all__ = ["BertForPropertyPrediction", "BertForKnowledgePrediction"]
+
+
+class BertForPPOutput(ModelOutput):
+    loss: torch.FloatTensor = None
+    logits: torch.FloatTensor = None
+
+
+class BertForPropertyPrediction(BaseModel):
+    def __init__(self, pretrained_model_dir=None, head_dropout=0.5):
+        super(BertForPropertyPrediction, self).__init__()
+        self.bert = BertModel.from_pretrained(pretrained_model_dir)
+        self.hidden_size = self.bert.config.hidden_size
+        self.head_dropout = head_dropout
+        self.dropout = nn.Dropout(head_dropout)
+        self.classifier = nn.Linear(self.hidden_size, 1)
+        self.sigmoid = nn.Sigmoid()
+        self.criterion = nn.MSELoss()
+
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__"]}
+        self.config['architecture'] = 'BertForPropertyPrediction'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self,
+                input_ids=None,
+                attention_mask=None,
+                token_type_ids=None,
+                labels=None):
+        outputs = self.bert(input_ids=input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids)
+        item_embeds = outputs.last_hidden_state[:, 0, :]
+        item_embeds = self.dropout(item_embeds)
+
+        logits = self.sigmoid(self.classifier(item_embeds)).squeeze(1)
+        loss = None
+        if labels is not None:
+            loss = self.criterion(logits, labels) if labels is not None else None
+        return BertForPPOutput(
+            loss=loss,
+            logits=logits,
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                pretrained_model_dir=model_config['pretrained_model_dir'],
+                head_dropout=model_config.get("head_dropout", 0.5)
+            )
+
+    # @classmethod
+    # def from_pretrained(cls):
+    #     NotImplementedError
+    #     # 需要验证是否和huggingface的模型兼容
+
+
+class BertForKnowledgePrediction(BaseModel):
+    def __init__(self,
+                 num_classes_list: List[int] = None,
+                 num_total_classes: int = None,
+                 pretrained_model_dir=None,
+                 head_dropout=0.5,
+                 flat_cls_weight=0.5,
+                 attention_unit_size=256,
+                 fc_hidden_size=512,
+                 beta=0.5,
+                 ):
+        super(BertForKnowledgePrediction, self).__init__()
+        self.bert = BertModel.from_pretrained(pretrained_model_dir)
+        self.hidden_size = self.bert.config.hidden_size
+        self.head_dropout = head_dropout
+        self.dropout = nn.Dropout(head_dropout)
+        self.classifier = nn.Linear(self.hidden_size, 1)
+        self.sigmoid = nn.Sigmoid()
+        self.criterion = nn.MSELoss()
+        self.flat_classifier = nn.Linear(self.hidden_size, num_total_classes)
+        self.ham_classifier = HAM(
+            num_classes_list=num_classes_list,
+            num_total_classes=num_total_classes,
+            sequence_model_hidden_size=self.bert.config.hidden_size,
+            attention_unit_size=attention_unit_size,
+            fc_hidden_size=fc_hidden_size,
+            beta=beta,
+            dropout_rate=head_dropout
+        )
+        self.flat_cls_weight = flat_cls_weight
+        self.num_classes_list = num_classes_list
+        self.num_total_classes = num_total_classes
+
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__"]}
+        self.config['architecture'] = 'BertForKnowledgePrediction'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self,
+                input_ids=None,
+                attention_mask=None,
+                token_type_ids=None,
+                labels=None):
+        outputs = self.bert(input_ids=input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids)
+        item_embeds = outputs.last_hidden_state[:, 0, :]
+        item_embeds = self.dropout(item_embeds)
+        tokens_embeds = outputs.last_hidden_state
+        tokens_embeds = self.dropout(tokens_embeds)
+        flat_logits = self.sigmoid(self.flat_classifier(item_embeds))
+        ham_outputs = self.ham_classifier(tokens_embeds)
+        ham_logits = self.sigmoid(ham_outputs.scores)
+        logits = self.flat_cls_weight * flat_logits + (1 - self.flat_cls_weight) * ham_logits
+        loss = None
+        if labels is not None:
+            labels = torch.sum(torch.nn.functional.one_hot(labels, num_classes=self.num_total_classes), dim=1)
+            labels = labels.float()
+            loss = self.criterion(logits, labels) if labels is not None else None
+        return BertForPPOutput(
+            loss=loss,
+            logits=logits,
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                pretrained_model_dir=model_config['pretrained_model_dir'],
+                head_dropout=model_config.get("head_dropout", 0.5),
+                num_classes_list=model_config.get('num_classes_list'),
+                num_total_classes=model_config.get('num_total_classes'),
+                flat_cls_weight=model_config.get('flat_cls_weight', 0.5),
+                attention_unit_size=model_config.get('attention_unit_size', 256),
+                fc_hidden_size=model_config.get('fc_hidden_size', 512),
+                beta=model_config.get('beta', 0.5),
+            )
+
+    # @classmethod
+    # def from_pretrained(cls):
+    #     NotImplementedError
+    #     # 需要验证是否和huggingface的模型兼容
diff --git a/EduNLP/ModelZoo/disenqnet/__init__.py b/EduNLP/ModelZoo/disenqnet/__init__.py
index aef2a335..975cfaff 100644
--- a/EduNLP/ModelZoo/disenqnet/__init__.py
+++ b/EduNLP/ModelZoo/disenqnet/__init__.py
@@ -1,3 +1,3 @@
 # -*- coding: utf-8 -*-
 
-from .disenqnet import DisenQNet
+from .disenqnet import DisenQNet, DisenQNetForPreTraining
diff --git a/EduNLP/ModelZoo/disenqnet/disenqnet.py b/EduNLP/ModelZoo/disenqnet/disenqnet.py
index 1d47c2a5..b8dc6fca 100644
--- a/EduNLP/ModelZoo/disenqnet/disenqnet.py
+++ b/EduNLP/ModelZoo/disenqnet/disenqnet.py
@@ -12,9 +12,28 @@
 from .modules import TextEncoder, AttnModel, ConceptEstimator, MIEstimator, DisenEstimator
 from .utils import get_mask
 from ..utils import set_device
+from ..base_model import BaseModel
+from transformers.modeling_outputs import ModelOutput
+from transformers import PretrainedConfig
 
 
-class QuestionEncoder(nn.Module):
+class DisenQNetOutput(ModelOutput):
+    """
+    Output type of [`DisenQNet`]
+
+    Parameters
+    ----------
+    embed: Tensor of (batch_size, seq_len, hidden_size), word embedding
+    k_hidden: Tensor of (batch_size, hidden_size) or None, concept representation of question
+    i_hidden: Tensor of (batch_size, hidden_size) or None, individual representation of question
+    """
+    embeded: torch.FloatTensor = None
+    k_hidden: torch.FloatTensor = None
+    i_hidden: torch.FloatTensor = None
+
+
+class DisenQNet(BaseModel):
+    base_model_prefix = 'disenq'
     """
     DisenQNet question representation model
 
@@ -22,29 +41,34 @@ class QuestionEncoder(nn.Module):
     ----------
     vocab_size: int
         size of vocabulary
-    hidden_dim: int
+    hidden_size: int
         size of word and question embedding
-    dropout: float
+    dropout_rate: float
         dropout rate
     wv: torch.Tensor
-        Tensor of (vocab_size, hidden_dim) or None, initial word embedding, default = None
+        Tensor of (vocab_size, hidden_size) or None, initial word embedding, default = None
     """
 
-    def __init__(self, vocab_size, hidden_dim, dropout, wv=None):
-        super(QuestionEncoder, self).__init__()
-        self.hidden_dim = hidden_dim
-        self.encoder = TextEncoder(vocab_size, hidden_dim, dropout, wv=wv)
-        self.k_model = AttnModel(hidden_dim, dropout)
-        self.i_model = AttnModel(hidden_dim, dropout)
-        self.dropout = nn.Dropout(p=dropout)
-
-    def forward(self, input, length, get_vk=True, get_vi=True):
+    def __init__(self, vocab_size: int, hidden_size: int, dropout_rate: float, wv=None, **kwargs):
+        super(DisenQNet, self).__init__()
+        self.hidden_size = hidden_size
+        self.encoder = TextEncoder(vocab_size, hidden_size, dropout_rate, wv=wv)
+        self.k_model = AttnModel(hidden_size, dropout_rate)
+        self.i_model = AttnModel(hidden_size, dropout_rate)
+        self.dropout = nn.Dropout(p=dropout_rate)
+        # config
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__", "kwargs", 'wv']}
+        self.config.update(kwargs)
+        self.config['architecture'] = 'DisenQNet'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self, seq_idx=None, seq_len=None, get_vk=True, get_vi=True) -> ModelOutput:
         """
         Parameters
         ----------
-        input: Tensor of (batch_size, seq_len)
+        seq_idx: Tensor of (batch_size, seq_len)
             word index
-        length: Tensor of (batch_size)
+        seq_len: Tensor of (batch_size)
             valid sequence length of each batch
         get_vk: bool
             whether to return vk
@@ -53,286 +77,144 @@ def forward(self, input, length, get_vk=True, get_vi=True):
 
         Returns
         -------
-        (embed, k_hidden, i_hidden)
-            - embed: Tensor of (batch_size, seq_len, hidden_dim), word embedding
-            - k_hidden: Tensor of (batch_size, hidden_dim) or None, concept representation of question
-            - i_hidden: Tensor of (batch_size, hidden_dim) or None, individual representation of question
+        DisenQNetOutput
+            - embed: Tensor of (batch_size, seq_len, hidden_size), word embedding
+            - k_hidden: Tensor of (batch_size, hidden_size) or None, concept representation of question
+            - i_hidden: Tensor of (batch_size, hidden_size) or None, individual representation of question
         """
-        # embed: batch_size * seq_len * hidden_dim
-        # q_hidden: batch_size * hidden_dim
-        embed, q_hidden = self.encoder(input)
+        # embed: batch_size * seq_len * hidden_size
+        # q_hidden: batch_size * hidden_size
+        embed, q_hidden = self.encoder(seq_idx)
         # batch_size * seq_len, 0 means valid, 1 means pad
-        mask = get_mask(input.size(1), length)
+        mask = get_mask(seq_idx.size(1), seq_len)
         embed.masked_fill_(mask.unsqueeze(-1), 0)
         k_hidden, i_hidden = None, None
         q_hidden_dp = self.dropout(q_hidden)
         embed_dp = self.dropout(embed)
-        # batch_size * hidden_dim
+        # batch_size * hidden_size
         if get_vk:
             k_hidden, _ = self.k_model(q_hidden_dp, embed_dp, embed_dp, mask)
         if get_vi:
             i_hidden, _ = self.i_model(q_hidden_dp, embed_dp, embed_dp, mask)
-        return embed, k_hidden, i_hidden
+        return DisenQNetOutput(
+            embeded=embed,
+            k_hidden=k_hidden,
+            i_hidden=i_hidden
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                vocab_size=model_config['vocab_size'],
+                hidden_size=model_config['hidden_size'],
+                dropout_rate=model_config['dropout_rate'],
+            )
 
 
-class DisenQNet(object):
+class DisenQNetForPreTrainingOutput(ModelOutput):
     """
-    DisenQNet training and evaluation model
+    Output type of [`DisenQNetForPreTraining`]
 
     Parameters
     ----------
-    vocab_size: int
-        size of vocabulary
-    concept_size: int
-        number of concept classes
-    hidden_dim: int
-        size of word and question embedding
-    dropout: float
-        dropout rate
-    pos_weight: float
-        positive sample weight in unbalanced multi-label concept classifier
-    w_cp: float
-        weight of concept loss
-    w_mi: float
-        weight of mutual information loss
-    w_dis: float
-        weight of disentangling loss
-    wv: torch.Tensor
-        Tensor of (vocab_size, hidden_dim) or None, initial word embedding, default = None
-    device: str, defaults as 'cpu'
-        Set device for model, examples 'cpu'、'cuda'、'cuda:0,2'
+    loss
+    embed: Tensor of (batch_size, seq_len, hidden_size), word embedding
+    k_hidden: Tensor of (batch_size, hidden_size) or None, concept representation of question
+    i_hidden: Tensor of (batch_size, hidden_size) or None, individual representation of question
     """
-    def __init__(self, vocab_size, concept_size, hidden_dim, dropout, pos_weight, w_cp, w_mi, w_dis,
-                 wv=None, device="cpu"):
-        super(DisenQNet, self).__init__()
-        self.disen_q_net = QuestionEncoder(vocab_size, hidden_dim, dropout, wv)
-        self.mi_estimator = MIEstimator(hidden_dim, hidden_dim * 2, dropout)
-        self.concept_estimator = ConceptEstimator(hidden_dim, concept_size, pos_weight, dropout)
-        self.disen_estimator = DisenEstimator(hidden_dim, dropout)
+    loss: torch.FloatTensor = None
+    embeded: torch.FloatTensor = None
+    k_hidden: torch.FloatTensor = None
+    i_hidden: torch.FloatTensor = None
+
+
+class DisenQNetForPreTraining(BaseModel):
+    base_model_prefix = 'disenq'
+
+    def __init__(self, vocab_size, concept_size, hidden_size, dropout_rate, pos_weight,
+                 w_cp, w_mi, w_dis, warmup, n_adversarial, wv=None, **kwargs):
+        super(DisenQNetForPreTraining, self).__init__()
+        self.disenq = DisenQNet(
+            vocab_size=vocab_size,
+            hidden_size=hidden_size,
+            dropout_rate=dropout_rate,
+            wv=wv,
+            **kwargs)
+        self.mi_estimator = MIEstimator(hidden_size, hidden_size * 2, dropout_rate)
+        self.concept_estimator = ConceptEstimator(hidden_size, concept_size, pos_weight, dropout_rate)
+        self.disen_estimator = DisenEstimator(hidden_size, dropout_rate)
         self.w_cp = w_cp
         self.w_mi = w_mi
         self.w_dis = w_dis
-        self.hidden_dim = hidden_dim
+        self.hidden_size = hidden_size
+        self.warming_up = False
         self.params = {
             "vocab_size": vocab_size,
             "concept_size": concept_size,
-            "hidden_dim": hidden_dim,
-            "dropout": dropout,
+            "hidden_size": hidden_size,
+            "dropout": dropout_rate,
             "pos_weight": pos_weight,
             "w_cp": w_cp,
             "w_mi": w_mi,
             "w_dis": w_dis,
+            'warmup': warmup,
+            'n_adversarial': n_adversarial,
         }
-        self.modules = (self.disen_q_net, self.mi_estimator, self.concept_estimator, self.disen_estimator)
-        self.to(device)
+        self.modules = (self.disenq, self.mi_estimator, self.concept_estimator, self.disen_estimator)
 
-    def train(self, train_data, test_data, epoch, lr, step_size, gamma, warm_up, n_adversarial, silent):
-        """
-        train DisenQNet
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__", "kwargs", 'wv']}
+        self.config.update(kwargs)
+        self.config['architecture'] = 'DisenQNetForPreTraining'
+        self.config = PretrainedConfig.from_dict(self.config)
 
-        Parameters
-        ----------
-        train_data:
-            train dataloader, contains text, length, concept
-            - text: Tensor of (batch_size, seq_len)
-            - length: Tensor of (batch_size)
-            - concept: Tensor of (batch_size, class_size)
-        test_data:
-            test dataloader
-        epoch: int
-            number of epoch
-        lr: float
-            initial learning rate
-        step_size: int
-            step_size for StepLR, period of learning rate decay
-        gamma: float
-            gamma for StepLR, multiplicative factor of learning rate decay
-        warm_up: int
-            number of epoch for warming up, without adversarial process for dis_loss
-        n_adversarial: int
-            ratio of disc/enc training for adversarial process
-        silent: bool
-            whether to log loss
-        """
-        if not silent:
-            print("Start training the disenQNet...")
-        # optimizer & scheduler
         model_params = list()
-        for params in [list(self.disen_q_net.parameters()),
+        for params in [list(self.disenq.parameters()),
                        list(self.mi_estimator.parameters()), list(self.concept_estimator.parameters())]:
             model_params.extend(params)
-
-        adv_params = list(self.disen_estimator.parameters())
-        optimizer = Adam(model_params, lr=lr)
-        adv_optimizer = Adam(adv_params, lr=lr)
-        scheduler = StepLR(optimizer, step_size=step_size, gamma=gamma)
-        adv_scheduler = StepLR(adv_optimizer, step_size=step_size, gamma=gamma)
-        # train
-        epoch = warm_up + epoch
-        for epoch_idx in range(epoch):
-            epoch_idx += 1
-            # warming_up: cp_loss & mi_loss only, ignore adversarial dis_loss
-            warming_up = (epoch_idx <= warm_up)
-            self.set_mode(True)
-            for data in train_data:
-                text, length, concept = data
-                text, length, concept = text.to(self.device), length.to(self.device), concept.to(self.device)
-                # WGAN-like adversarial training: min_enc max_disc dis_loss
-                # train disc
-                if not warming_up:
-                    _, k_hidden, i_hidden = self.disen_q_net(text, length)
-                    # stop gradient propagation to encoder
-                    k_hidden, i_hidden = k_hidden.detach(), i_hidden.detach()
-                    # max dis_loss
-                    dis_loss = - self.disen_estimator(k_hidden, i_hidden)
-                    dis_loss = n_adversarial * self.w_dis * dis_loss
-                    adv_optimizer.zero_grad()
-                    dis_loss.backward()
-                    adv_optimizer.step()
-                    # Lipschitz constrain for Disc of WGAN
-                    self.disen_estimator.spectral_norm()
-                # train enc
-                embed, k_hidden, i_hidden = self.disen_q_net(text, length)
-                hidden = torch.cat((k_hidden, i_hidden), dim=-1)
-                # max mi
-                mi_loss = - self.mi_estimator(embed, hidden, length)
-                # min concept_loss
-                cp_loss = self.concept_estimator(k_hidden, concept)
-                if warming_up:
-                    loss = self.w_mi * mi_loss + self.w_cp * cp_loss
-                else:
-                    # min dis
-                    dis_loss = self.disen_estimator(k_hidden, i_hidden)
-                    loss = self.w_mi * mi_loss + self.w_cp * cp_loss + self.w_dis * dis_loss
-                optimizer.zero_grad()
-                loss.backward()
-                optimizer.step()
-            if not warming_up:
-                scheduler.step()
-                adv_scheduler.step()
-            # test
-            train_loss = self.eval(train_data)
-            if test_data is not None and not warming_up:
-                test_loss = self.eval(test_data)
-                if not silent:
-                    print(f"[Epoch {epoch_idx:2d}] train loss: {train_loss:.4f}, eval loss: {test_loss:.4f}")
-            elif not silent:
-                print(f"[Epoch {epoch_idx:2d}] train loss: {train_loss:.4f}")
-        return
-
-    def inference(self, items: dict):
-        """
-        DisenQNet for i2v inference. Now not support for batch !
-
-        Parameters
-        ----------
-        items:  dict
-            which contains content_idx and  content_len
-            - content_idx: Tensor of (batch_size, seq_len)
-            - content_len: Tensor of (batch_size)
-        device: str
-            cpu or cuda
-
-        Returns
-        ---------
-        embed: torch.Tensor
-            Tensor of (batch_size, seq_len, hidden_dim)
-        k_hidden: torch.Tensor
-            Tensor of (batch_size, hidden_dim)
-        i_hidden: torch.Tensor
-            Tensor of (batch_size, hidden_dim)
-        """
-        self.set_mode(False)
-        text, length = items["content_idx"].to(self.device), items["content_len"].to(self.device)
-        embed, k_hidden, i_hidden = self.disen_q_net(text, length)
-        return embed, k_hidden, i_hidden
-
-    def eval(self, test_data):
-        """
-        eval DisenQNet
-
-        Parameters
-        ----------
-        test_data:
-            iterable, train dataset, contains text, length, concept
-            - text: Tensor of (batch_size, seq_len)
-            - length: Tensor of (batch_size)
-            - concept: Tensor of (batch_size, class_size)
-        device: str
-            cpu or cuda
-
-        Returns
-        ---------
-        loss: float
-            average loss for test dataset
-        """
-        total_size = 0
-        total_loss = 0
-        self.set_mode(False)
-        with torch.no_grad():
-            for data in test_data:
-                text, length, concept = data
-                text, length, concept = text.to(self.device), length.to(self.device), concept.to(self.device)
-                embed, k_hidden, i_hidden = self.disen_q_net(text, length)
-                hidden = torch.cat((k_hidden, i_hidden), dim=-1)
-                mi_loss = - self.mi_estimator(embed, hidden, length)
-                cp_loss = self.concept_estimator(k_hidden, concept)
-                dis_loss = self.disen_estimator(k_hidden, i_hidden)
-                loss = self.w_mi * mi_loss + self.w_cp * cp_loss + self.w_dis * dis_loss
-                batch_size = text.size(0)
-                total_size += batch_size
-                total_loss += loss.item() * batch_size
-        loss = total_loss / total_size
-        return loss
-
-    def save_pretrained(self, output_dir):
-        filepath = os.path.join(output_dir, "disen_q_net.th")
-        config_path = os.path.join(output_dir, "model_config.json")
-        state_dicts = [module.state_dict() for module in self.modules]
-        torch.save(state_dicts, filepath)
-        self.save_config(config_path)
-        return
-
-    def load(self, filepath):
-        state_dicts = torch.load(filepath, map_location='cpu')
-        for module, state_dict in zip(self.modules, state_dicts):
-            module.load_state_dict(state_dict)
-        return
-
-    def to(self, device):
-        for module in self.modules:
-            # module.to(device)
-            set_device(module, device)
-        self.device = "cpu" if device == "cpu" else "cuda"
-        return
-
-    def set_mode(self, train):
-        for module in self.modules:
-            if train:
-                module.train()
-            else:
-                module.eval()
-        return
-
-    def save_config(self, config_path):
-        with open(config_path, "w", encoding="utf-8") as wf:
-            json.dump(self.params, wf, ensure_ascii=False, indent=2)
+        self.model_params = model_params
+        self.adv_params = list(self.disen_estimator.parameters())
+
+    def forward(self, seq_idx=None, seq_len=None, concept=None) -> ModelOutput:
+        # train enc
+        outputs = self.disenq(seq_idx, seq_len)
+        embed = outputs.embeded
+        k_hidden = outputs.k_hidden
+        i_hidden = outputs.i_hidden
+        hidden = torch.cat((k_hidden, i_hidden), dim=-1)
+        # max mi
+        mi_loss = - self.mi_estimator(embed, hidden, seq_len)
+        # min concept_loss
+        cp_loss = self.concept_estimator(k_hidden, concept)
+        if self.warming_up:
+            loss = self.w_mi * mi_loss + self.w_cp * cp_loss
+        else:
+            # min dis
+            dis_loss = self.disen_estimator(k_hidden, i_hidden)
+            loss = self.w_mi * mi_loss + self.w_cp * cp_loss + self.w_dis * dis_loss
+        return DisenQNetForPreTrainingOutput(
+            loss=loss,
+            embeded=embed,
+            k_hidden=k_hidden,
+            i_hidden=i_hidden
+        )
 
     @classmethod
-    def from_config(cls, config_path):
+    def from_config(cls, config_path, **kwargs):
         with open(config_path, "r", encoding="utf-8") as rf:
             model_config = json.load(rf)
-            wv = torch.load(model_config["wv_path"],
-                            map_location='cpu', mmap="r") if "wv_path" in model_config else None
+            model_config.update(kwargs)
             return cls(
-                model_config["vocab_size"], model_config["concept_size"], model_config["hidden_dim"],
-                model_config["dropout"], model_config["pos_weight"], model_config["w_cp"], model_config["w_mi"],
-                model_config["w_dis"], wv=wv)
-
-    @classmethod
-    def from_pretrained(cls, model_dir):
-        config_path = os.path.join(model_dir, "model_config.json")
-        model_path = os.path.join(model_dir, "disen_q_net.th")
-        model = cls.from_config(config_path)
-        model.load(model_path)
-        return model
+                vocab_size=model_config['vocab_size'],
+                concept_size=model_config['concept_size'],
+                hidden_size=model_config['hidden_size'],
+                dropout_rate=model_config['dropout_rate'],
+                pos_weight=model_config['pos_weight'],
+                w_cp=model_config['w_cp'],
+                w_mi=model_config['w_mi'],
+                w_dis=model_config['w_dis'],
+                warmup=model_config['warmup'],
+                n_adversarial=model_config['n_adversarial'],
+            )
diff --git a/EduNLP/ModelZoo/disenqnet/modules.py b/EduNLP/ModelZoo/disenqnet/modules.py
index 9b5f71a0..b3a54022 100644
--- a/EduNLP/ModelZoo/disenqnet/modules.py
+++ b/EduNLP/ModelZoo/disenqnet/modules.py
@@ -25,7 +25,7 @@ def __init__(self, vocab_size, hidden_dim, dropout, wv=None):
         super(TextEncoder, self).__init__()
         self.embed = nn.Embedding(vocab_size, hidden_dim)
         if wv is not None:
-            self.embed.weight.data.copy_(wv)
+            self.load_wv(wv)
         self.encoder = TextCNN(hidden_dim, hidden_dim)
         self.dropout = nn.Dropout(p=dropout)
         return
@@ -48,6 +48,9 @@ def forward(self, input):
         hidden = self.encoder(embed_dp)
         return embed, hidden
 
+    def load_wv(self, wv: torch.Tensor):
+        self.embed.weight.data.copy_(wv)
+
 
 class AttnModel(nn.Module):
     """
diff --git a/EduNLP/ModelZoo/quesnet/__init__.py b/EduNLP/ModelZoo/quesnet/__init__.py
index 3ff96db4..8fae7c88 100644
--- a/EduNLP/ModelZoo/quesnet/__init__.py
+++ b/EduNLP/ModelZoo/quesnet/__init__.py
@@ -1,2 +1,2 @@
-from .quesnet import BiHRNN as QuesNet
+from .quesnet import QuesNet, QuesNetForPreTraining
 from .modules import AE, ImageAE, MetaAE
diff --git a/EduNLP/ModelZoo/quesnet/modules.py b/EduNLP/ModelZoo/quesnet/modules.py
index 6c4d8315..cdf9a2f3 100644
--- a/EduNLP/ModelZoo/quesnet/modules.py
+++ b/EduNLP/ModelZoo/quesnet/modules.py
@@ -14,10 +14,6 @@ def make_batch(self, data, device, pretrain=False):
     def load_emb(self, emb):
         pass
 
-    def pretrain_loss(self, batch):
-        """Returns pretraining loss on a batch of data"""
-        raise NotImplementedError
-
     def forward(self, *input):
         raise NotImplementedError
 
@@ -33,7 +29,7 @@ def dec(self, item, *args, **kwargs):
 
     def loss(self, item, emb=None):
         if emb is None:
-            emb = self.enc(item)
+            emb = self(item)
             out = self.dec(emb)
         else:
             out = self.dec(emb)
diff --git a/EduNLP/ModelZoo/quesnet/quesnet.py b/EduNLP/ModelZoo/quesnet/quesnet.py
index 903c2719..c7c730fb 100644
--- a/EduNLP/ModelZoo/quesnet/quesnet.py
+++ b/EduNLP/ModelZoo/quesnet/quesnet.py
@@ -9,104 +9,98 @@
 import torch.nn.functional as F
 from torch.nn.utils.rnn import pad_packed_sequence, PackedSequence
 from torchvision.transforms.functional import to_tensor
+from transformers.modeling_outputs import ModelOutput
+from transformers import PretrainedConfig
+from ..base_model import BaseModel
 
 
-class BiHRNN(FeatureExtractor):
-    """Sequence-to-sequence feature extractor based on RNN. Supports different
-    input forms and different RNN types (LSTM/GRU), """
+class QuesNetOutput(ModelOutput):
+    """
+    Output type of [`DisenQNet`]
 
-    def __init__(self, _stoi, embs: np.ndarray = None, pretrained_image: nn.Module = None,
-                 pretrained_meta: nn.Module = None,
-                 meta='know_name',
-                 emb_size=256,
-                 rnn='LSTM',
-                 lambda_input=None,
-                 lambda_loss=None,
-                 layers=4, **kwargs):
-        super(BiHRNN, self).__init__(**kwargs)
+    Parameters
+    ----------
+    pack_embeded: Tensor of (batch_size, seq_len, hidden_size), word embedding
+    hidden: Tensor of (batch_size, hidden_size) or None
+    """
+    pack_embeded: torch.FloatTensor = None
+    embeded: torch.FloatTensor = None
+    hidden: torch.FloatTensor = None
 
-        if lambda_loss is None:
-            lambda_loss = [1., 1.]
-        if lambda_input is None:
-            lambda_input = [1., 1., 1.]
-        self.config = {
-            'meta': meta,
-            'emb_size': emb_size,
-            'rnn': rnn,
-            'lambda_input': lambda_input,
-            'lambda_loss': lambda_loss,
-            'layers': layers,
-            'feat_size': self.feat_size,
-        }
-        feat_size = self.feat_size
-        rnn_size = self.rnn_size = feat_size // 2
 
-        self.stoi = _stoi
-        vocab_size = len(_stoi['word'])
-        self.itos = {v: k for k, v in self.stoi['word'].items()}
+class QuesNet(BaseModel, FeatureExtractor):
+    base_model_prefix = 'quesnet'
 
-        self.we = nn.Embedding(vocab_size, emb_size)
-        # embs: word2vec embeddings, (vocab_size, emb_size)
-        if embs is not None:
-            self.load_emb(embs)
+    def __init__(self, _stoi=None, meta='know_name', pretrained_embs: np.ndarray = None,
+                 pretrained_image: nn.Module = None, pretrained_meta: nn.Module = None,
+                 lambda_input=None,
+                 feat_size=256, emb_size=256, rnn_type='LSTM', layers=4, **kwargs):
+        BaseModel.__init__(self)
+        FeatureExtractor.__init__(self, feat_size=feat_size)
+        self.feat_size = feat_size
+        self.rnn_size = feat_size // 2
+        self.emb_size = emb_size
+        self.vocab_size = len(_stoi['word'])
 
+        self.stoi = _stoi
+        self.itos = {v: k for k, v in self.stoi['word'].items()}
+        # Encoder - Word
+        self.we = nn.Embedding(self.vocab_size, emb_size)
+        if pretrained_embs is not None:
+            self.load_emb(pretrained_embs)
+        # Encoder - Image
         self.ie = ImageAE(emb_size)
+        if pretrained_image is not None:
+            self.load_img(pretrained_image)
+        # Encoder - Mata
         self.meta = meta
         self.meta_size = len(_stoi[self.meta])
         self.me = MetaAE(self.meta_size, emb_size)
-        if pretrained_image is not None:
-            self.load_img(pretrained_image)
         if pretrained_meta is not None:
             self.load_meta(pretrained_meta)
-
+        if lambda_input is None:
+            lambda_input = [1., 1., 1.]
         self.lambda_input = lambda_input
-        self.lambda_loss = lambda_loss
-
-        if rnn == 'GRU':
-            self.rnn = nn.GRU(emb_size, rnn_size, layers,
+        self.proj_q = nn.Linear(feat_size, feat_size)
+        self.proj_k = nn.Linear(feat_size, feat_size)
+        self.proj_v = nn.Linear(feat_size, feat_size)
+        self.dropout = nn.Dropout(0.2)
+        self.rnn_type = rnn_type
+        if rnn_type == 'GRU':
+            self.rnn = nn.GRU(emb_size, self.rnn_size, layers,
                               bidirectional=True, batch_first=True)
-            self.h0 = nn.Parameter(torch.rand(layers * 2, 1, rnn_size))
-        elif rnn == 'LSTM':
-            self.rnn = nn.LSTM(emb_size, rnn_size, layers,
+            self.h0 = nn.Parameter(torch.rand(layers * 2, 1, self.rnn_size))
+        elif rnn_type == 'LSTM':
+            self.rnn = nn.LSTM(emb_size, self.rnn_size, layers,
                                bidirectional=True, batch_first=True)
-            self.h0 = nn.Parameter(torch.rand(layers * 2, 1, rnn_size))
-            self.c0 = nn.Parameter(torch.rand(layers * 2, 1, rnn_size))
+            self.h0 = nn.Parameter(torch.rand(layers * 2, 1, self.rnn_size))
+            self.c0 = nn.Parameter(torch.rand(layers * 2, 1, self.rnn_size))
         else:
             raise ValueError('quesnet only support GRU and LSTM now.')
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__", "kwargs"]}
+        # self.config.update(kwargs)
+        self.config["architecture"] = 'quesnet'
+        self.config = PretrainedConfig.from_dict(self.config)
 
-        self.proj_q = nn.Linear(feat_size, feat_size)
-        self.proj_k = nn.Linear(feat_size, feat_size)
-        self.proj_v = nn.Linear(feat_size, feat_size)
-
-        self.woutput = nn.Linear(feat_size, vocab_size)
-        self.ioutput = nn.Linear(feat_size, emb_size)
-        self.moutput = nn.Linear(feat_size, emb_size)
-
-        self.lwoutput = nn.Linear(rnn_size, vocab_size)
-        self.lioutput = nn.Linear(rnn_size, emb_size)
-        self.lmoutput = nn.Linear(rnn_size, emb_size)
-
-        self.rwoutput = nn.Linear(rnn_size, vocab_size)
-        self.rioutput = nn.Linear(rnn_size, emb_size)
-        self.rmoutput = nn.Linear(rnn_size, emb_size)
-
-        self.ans_decode = nn.GRU(emb_size, feat_size, layers,
-                                 batch_first=True)
-        self.ans_output = nn.Linear(feat_size, vocab_size)
-        self.ans_judge = nn.Linear(feat_size, 1)
-        self.dropout = nn.Dropout(0.2)
+    def init_h(self, batch_size):
+        size = list(self.h0.size())
+        size[1] = batch_size
+        if self.config.rnn_type == 'GRU':
+            return self.h0.expand(size).contiguous()
+        else:
+            return self.h0.expand(size).contiguous(), self.c0.expand(size).contiguous()
 
     def load_emb(self, emb):
         self.we.weight.detach().copy_(torch.from_numpy(emb))
 
     def load_img(self, img_layer: nn.Module):
-        if self.config['emb_size'] != img_layer.emb_size:
+        if self.config.emb_size != img_layer.emb_size:
             raise ValueError("Unmatched pre-trained ImageAE and embedding size")
         else:
             self.ie.load_state_dict(img_layer.state_dict())
 
     def load_meta(self, meta_layer: nn.Module):
-        if self.config['emb_size'] != meta_layer.emb_size or self.meta_size != meta_layer.meta_size:
+        if self.config.emb_size != meta_layer.emb_size or self.meta_size != meta_layer.meta_size:
             raise ValueError("Unmatched pre-trained MetaAE and embedding size or meta size")
         else:
             self.me.load_state_dict(meta_layer.state_dict())
@@ -206,8 +200,8 @@ def make_batch(self, data, device, pretrain=False):
         else:
             return embs
 
-    def forward(self, batch: SeqBatch):
-        packed = batch.packed()
+    def forward(self, inputs: SeqBatch):
+        packed = inputs.packed()
         h = self.init_h(packed.batch_sizes[0])
         # y: (batch_size, seq_len, 2*rnn_size)
         y, _ = self.rnn(packed, h)
@@ -215,7 +209,7 @@ def forward(self, batch: SeqBatch):
         hs, lens = pad_packed_sequence(y, batch_first=True)
         mask = [[1] * lens[i].item() + [0] * (lens[0] - lens[i]).item()
                 for i in range(len(lens))]
-        mask = torch.tensor(mask).byte().to(batch.device)
+        mask = torch.tensor(mask).byte().to(inputs.device)
 
         # hs: (B, S, D), mask: (B, S)
         q, k, v = self.proj_q(hs), self.proj_k(hs), self.proj_v(hs)
@@ -223,33 +217,115 @@ def forward(self, batch: SeqBatch):
         scores = q @ k.transpose(-2, -1) / np.sqrt(k.size(-1))  # (B, S, S)
         if mask is not None:
             mask = mask.float()
-            scores -= 1e9 * (1.0 - mask.unsqueeze(1))
+            scores = scores - 1e9 * (1.0 - mask.unsqueeze(1))
         scores = self.dropout(F.softmax(scores, dim=-1))  # (B, S, S)
         h = (scores @ v).max(1)[0]  # (B, D)
 
-        return y, batch.invert(h, 0), hs
+        return QuesNetOutput(
+            pack_embeded=y,
+            embeded=hs,
+            hidden=inputs.invert(h, 0)
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(_stoi=model_config["_stoi"],
+                       feat_size=model_config["feat_size"],
+                       emb_size=model_config["emb_size"],
+                       rnn_type=model_config["rnn_type"],
+                       layers=model_config["layers"])
+
 
-    def pretrain_loss(self, batch):
+class QuesNetForPreTrainingOutput(ModelOutput):
+    """
+    Output type of [`DisenQNet`]
+
+    Parameters
+    ----------
+    hidden: Tensor of (batch_size, hidden_size) or None
+    """
+    loss: torch.FloatTensor = None
+    embeded: torch.FloatTensor = None
+    hidden: torch.FloatTensor = None
+
+
+class QuesNetForPreTraining(BaseModel):
+    base_model_prefix = 'quesnet'
+    """Sequence-to-sequence feature extractor based on RNN. Supports different
+    input forms and different RNN types (LSTM/GRU), """
+    def __init__(self, _stoi=None, pretrained_embs: np.ndarray = None, pretrained_image: nn.Module = None,
+                 pretrained_meta: nn.Module = None,
+                 meta='know_name',
+                 emb_size=256,
+                 feat_size=512,
+                 rnn_type='LSTM',
+                 lambda_input=None,
+                 lambda_loss=None,
+                 layers=4, **kwargs):
+        BaseModel.__init__(self)
+        self.quesnet = QuesNet(_stoi, meta=meta, pretrained_embs=pretrained_embs, pretrained_image=pretrained_image,
+                               pretrained_meta=pretrained_meta, lambda_input=lambda_input, feat_size=feat_size,
+                               emb_size=emb_size, rnn_type=rnn_type, layers=layers, **kwargs)
+        self.vocab_size = self.quesnet.vocab_size
+        self.feat_size = self.quesnet.feat_size
+        self.emb_size = self.quesnet.emb_size
+        self.rnn_size = self.quesnet.rnn_size
+        if lambda_loss is None:
+            lambda_loss = [1., 1.]
+        self.lambda_loss = lambda_loss
+        # 预训练头 - HLM
+        self.woutput = nn.Linear(self.feat_size, self.vocab_size)
+        self.ioutput = nn.Linear(self.feat_size, self.emb_size)
+        self.moutput = nn.Linear(self.feat_size, self.emb_size)
+
+        self.lwoutput = nn.Linear(self.rnn_size, self.vocab_size)
+        self.lioutput = nn.Linear(self.rnn_size, self.emb_size)
+        self.lmoutput = nn.Linear(self.rnn_size, self.emb_size)
+
+        self.rwoutput = nn.Linear(self.rnn_size, self.vocab_size)
+        self.rioutput = nn.Linear(self.rnn_size, self.emb_size)
+        self.rmoutput = nn.Linear(self.rnn_size, self.emb_size)
+        # 预训练头 - QA
+        self.ans_decode = nn.GRU(self.emb_size, self.feat_size, layers,
+                                 batch_first=True)
+        self.ans_output = nn.Linear(self.feat_size, self.vocab_size)
+        self.ans_judge = nn.Linear(self.feat_size, 1)
+        self.dropout = nn.Dropout(0.2)
+
+        self.config = {k: v for k, v in locals().items() if k not in [
+            "self", "__class__", "kwargs", "pretrained_embs", "pretrained_image", "pretrained_meta"]}
+        # self.config.update(kwargs)
+        self.config['architecture'] = 'quesnet'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self, batch):
         left, right, words, ims, metas, wmask, imask, mmask, inputs, ans_input, ans_output, false_opt_input = batch
 
         # high-level loss
-        _, h, _ = self(inputs)
+        outputs = self.quesnet(inputs)
+        embeded = outputs.embeded
+        h = outputs.hidden
+
         x = ans_input.packed()
-        y, _ = self.ans_decode(PackedSequence(self.we(x.data), x.batch_sizes),
-                               h.repeat(self.config['layers'], 1, 1))
+        y, _ = self.ans_decode(PackedSequence(self.quesnet.we(x.data), x.batch_sizes),
+                               h.repeat(self.config.layers, 1, 1))
         floss = F.cross_entropy(self.ans_output(y.data),
                                 ans_output.packed().data)
-        floss += F.binary_cross_entropy_with_logits(self.ans_judge(y.data),
-                                                    torch.ones_like(self.ans_judge(y.data)))
+        floss = floss + F.binary_cross_entropy_with_logits(self.ans_judge(y.data),
+                                                           torch.ones_like(self.ans_judge(y.data)))
         for false_opt in false_opt_input:
             x = false_opt.packed()
-            y, _ = self.ans_decode(PackedSequence(self.we(x.data), x.batch_sizes),
-                                   h.repeat(self.config['layers'], 1, 1))
-            floss += F.binary_cross_entropy_with_logits(self.ans_judge(y.data),
-                                                        torch.zeros_like(self.ans_judge(y.data)))
+            y, _ = self.ans_decode(PackedSequence(self.quesnet.we(x.data), x.batch_sizes),
+                                   h.repeat(self.config.layers, 1, 1))
+            floss = floss + F.binary_cross_entropy_with_logits(self.ans_judge(y.data),
+                                                               torch.zeros_like(self.ans_judge(y.data)))
+        loss = floss * self.lambda_loss[1]
         # low-level loss
-        left_hid = self(left)[0].data[:, :self.rnn_size]
-        right_hid = self(right)[0].data[:, self.rnn_size:]
+        left_hid = self.quesnet(left).pack_embeded.data[:, :self.rnn_size]
+        right_hid = self.quesnet(right).pack_embeded.data[:, self.rnn_size:]
 
         wloss = iloss = mloss = None
 
@@ -262,8 +338,9 @@ def pretrain_loss(self, batch):
             rout = self.rwoutput(rwfea)
             out = self.woutput(torch.cat([lwfea, rwfea], dim=1))
             wloss = (F.cross_entropy(out, words) + F.cross_entropy(lout, words) + F.
-                     cross_entropy(rout, words)) * self.lambda_input[0] / 3
+                     cross_entropy(rout, words)) * self.quesnet.lambda_input[0] / 3
             wloss *= self.lambda_loss[0]
+            loss = loss + wloss
 
         if ims is not None:
             lifea = torch.masked_select(left_hid, imask.unsqueeze(1).bool()) \
@@ -273,9 +350,10 @@ def pretrain_loss(self, batch):
                 .view(-1, self.rnn_size)
             rout = self.rioutput(rifea)
             out = self.ioutput(torch.cat([lifea, rifea], dim=1))
-            iloss = (self.ie.loss(ims, out) + self.ie.loss(ims, lout) + self.ie.
-                     loss(ims, rout)) * self.lambda_input[1] / 3
+            iloss = (self.quesnet.ie.loss(ims, out) + self.quesnet.ie.loss(ims, lout) + self.quesnet.ie.
+                     loss(ims, rout)) * self.quesnet.lambda_input[1] / 3
             iloss *= self.lambda_loss[0]
+            loss = loss + iloss
 
         if metas is not None:
             lmfea = torch.masked_select(left_hid, mmask.unsqueeze(1).bool()) \
@@ -285,62 +363,26 @@ def pretrain_loss(self, batch):
                 .view(-1, self.rnn_size)
             rout = self.rmoutput(rmfea)
             out = self.moutput(torch.cat([lmfea, rmfea], dim=1))
-            mloss = (self.me.loss(metas, out) + self.me.loss(metas, lout) + self.me.
-                     loss(metas, rout)) * self.lambda_input[2] / 3
+            mloss = (self.quesnet.me.loss(metas, out) + self.quesnet.me.loss(metas, lout) + self.quesnet.me.
+                     loss(metas, rout)) * self.quesnet.lambda_input[2] / 3
             mloss *= self.lambda_loss[0]
+            loss = loss + mloss
 
-        return {
-            'field_loss': floss * self.lambda_loss[1],
-            'word_loss': wloss,
-            'image_loss': iloss,
-            'meta_loss': mloss
-        }
-
-    def init_h(self, batch_size):
-        size = list(self.h0.size())
-        size[1] = batch_size
-        if self.config['rnn'] == 'GRU':
-            return self.h0.expand(size).contiguous()
-        else:
-            return self.h0.expand(size).contiguous(), self.c0.expand(size).contiguous()
-
-    @classmethod
-    def from_pretrained(cls, pretrained_dir, tokenizer):
-        config_path = os.path.join(pretrained_dir, "config.json")
-        model_path = os.path.join(pretrained_dir, "model.pt")
-        model = cls.from_config(config_path, tokenizer.stoi)
-        model.load_state_dict(torch.load(model_path))
-        return model
+        return QuesNetForPreTrainingOutput(
+            loss=loss,
+            embeded=embeded,
+            hidden=h
+        )
 
     @classmethod
-    def from_config(cls, config_path, stoi):
+    def from_config(cls, config_path, **kwargs):
         with open(config_path, "r", encoding="utf-8") as rf:
             model_config = json.load(rf)
-            wv = torch.load(model_config["wv_path"],
-                            map_location='cpu', mmap="r") if "wv_path" in model_config else None
+            model_config.update(kwargs)
             return cls(
-                _stoi=stoi,
-                embs=wv, meta=model_config["meta"], emb_size=model_config["emb_size"],
+                _stoi=model_config["_stoi"],
+                emb_size=model_config["emb_size"],
                 rnn=model_config["rnn"], lambda_input=model_config["lambda_input"],
                 lambda_loss=model_config["lambda_loss"], layers=model_config["layers"],
-                feat_size=model_config["feat_size"])
-
-    def save(self, path):
-        """ Save model to path/model_name.pt and path/config.json
-
-        Parameters
-        ----------
-        path : str
-            directory to save model
-        """
-        if not os.path.exists(path):
-            os.makedirs(path, exist_ok=True)
-        model_path = os.path.join(path, 'model.pt')
-        model_path = Path(model_path)
-        torch.save(self.state_dict(), model_path.open('wb'))
-        config_path = os.path.join(path, "config.json")
-        self.save_config(config_path)
-
-    def save_config(self, config_path):
-        with open(config_path, "w", encoding="utf-8") as wf:
-            json.dump(self.config, wf, ensure_ascii=False, indent=2)
+                feat_size=model_config["feat_size"]
+            )
diff --git a/EduNLP/ModelZoo/rnn/__init__.py b/EduNLP/ModelZoo/rnn/__init__.py
index 940e78ca..2ac479e2 100644
--- a/EduNLP/ModelZoo/rnn/__init__.py
+++ b/EduNLP/ModelZoo/rnn/__init__.py
@@ -1,4 +1,4 @@
 # coding: utf-8
 # 2021/7/12 @ tongshiwei
 
-from .rnn import LM, ElmoLM
+from .rnn import *
diff --git a/EduNLP/ModelZoo/rnn/harnn.py b/EduNLP/ModelZoo/rnn/harnn.py
new file mode 100644
index 00000000..af28f22f
--- /dev/null
+++ b/EduNLP/ModelZoo/rnn/harnn.py
@@ -0,0 +1,180 @@
+import torch
+import torch.nn as nn
+from torch.autograd import Variable
+from transformers.modeling_outputs import ModelOutput
+from typing import List, Dict, Optional
+
+__all__ = ["HAM"]
+
+
+class HAMOutput(ModelOutput):
+    """
+        Output type of [`HAM`]
+
+        Parameters
+        ----------
+        scores: of shape (batch_size, sequence_length)
+        first_att_weight: of shape
+        second_visual: of shape (batch_size, num_classes)
+        third_visual: of shape (batch_size, num_classes)
+        first_logits: of shape (batch_size, num_classes)
+        second_logits: of shape (batch_size, num_classes)
+        third_logits: of shape (batch_size, num_classes)
+        global_logits: of shape (batch_size, num_classes)
+        first_scores: of shape (batch_size, num_classes)
+        second_scores: of shape (batch_size, num_classes)
+    """
+    scores: torch.FloatTensor = None
+    first_att_weight: torch.FloatTensor = None
+    second_visual: torch.FloatTensor = None
+    third_visual: torch.FloatTensor = None
+    first_logits: torch.FloatTensor = None
+    second_logits: torch.FloatTensor = None
+    third_logits: torch.FloatTensor = None
+    global_logits: torch.FloatTensor = None
+    first_scores: torch.FloatTensor = None
+    second_scores: torch.FloatTensor = None
+
+
+def truncated_normal_(tensor, mean=0, std=0.1):
+    size = tensor.shape
+    tmp = tensor.new_empty(size + (4,)).normal_()
+    valid = (tmp < 2) & (tmp > -2)
+    ind = valid.max(-1, keepdim=True)[1]
+    tensor.data.copy_(tmp.gather(-1, ind).squeeze(-1))
+    tensor.data.mul_(std).add_(mean)
+    return tensor
+
+
+class AttentionLayer(nn.Module):
+    def __init__(self, num_units, attention_unit_size, num_classes):
+        super(AttentionLayer, self).__init__()
+        self.fc1 = nn.Linear(num_units, attention_unit_size, bias=False)
+        self.fc2 = nn.Linear(attention_unit_size, num_classes, bias=False)
+
+    def forward(self, input_x):
+        attention_matrix = self.fc2(torch.tanh(self.fc1(input_x))).transpose(1, 2)
+        attention_weight = torch.softmax(attention_matrix, dim=-1)
+        attention_out = torch.matmul(attention_weight, input_x)
+        return attention_weight, torch.mean(attention_out, dim=1)
+
+
+class LocalLayer(nn.Module):
+    def __init__(self, num_units, num_classes):
+        super(LocalLayer, self).__init__()
+        self.fc = nn.Linear(num_units, num_classes)
+
+    def forward(self, input_x, input_att_weight):
+        logits = self.fc(input_x)
+        scores = torch.sigmoid(logits)
+        visual = torch.mul(input_att_weight, scores.unsqueeze(-1))
+        visual = torch.softmax(visual, dim=-1)
+        visual = torch.mean(visual, dim=1)
+        return logits, scores, visual
+
+
+class HAM(nn.Module):
+
+    def __init__(
+            self,
+            num_classes_list: List[int],
+            num_total_classes: int,
+            sequence_model_hidden_size: int,
+            attention_unit_size: Optional[int] = 256,
+            fc_hidden_size: Optional[int] = 512,
+            beta: Optional[float] = 0.5,
+            dropout_rate=None):
+        super(HAM, self).__init__()
+        self.beta = beta
+
+        assert num_total_classes == sum(num_classes_list)
+        # First Level
+        self.first_attention = AttentionLayer(sequence_model_hidden_size, attention_unit_size, num_classes_list[0])
+        self.first_fc = nn.Linear(sequence_model_hidden_size * 2, fc_hidden_size)
+        self.first_local = LocalLayer(fc_hidden_size, num_classes_list[0])
+
+        # Second Level
+        self.second_attention = AttentionLayer(sequence_model_hidden_size, attention_unit_size, num_classes_list[1])
+        self.second_fc = nn.Linear(sequence_model_hidden_size * 2, fc_hidden_size)
+        self.second_local = LocalLayer(fc_hidden_size, num_classes_list[1])
+
+        # Third Level
+        self.third_attention = AttentionLayer(sequence_model_hidden_size, attention_unit_size, num_classes_list[2])
+        self.third_fc = nn.Linear(sequence_model_hidden_size * 2, fc_hidden_size)
+        self.third_local = LocalLayer(fc_hidden_size, num_classes_list[2])
+
+        # Fully Connected Layer
+        self.fc = nn.Linear(fc_hidden_size * 3, fc_hidden_size)
+
+        # Highway Layer
+        self.highway_lin = nn.Linear(fc_hidden_size, fc_hidden_size)
+        self.highway_gate = nn.Linear(fc_hidden_size, fc_hidden_size)
+
+        # Add dropout
+        self.dropout = nn.Dropout(dropout_rate)
+
+        # Global scores
+        self.global_scores_fc = nn.Linear(fc_hidden_size, num_total_classes)
+
+        for name, param in self.named_parameters():
+            if 'embedding' not in name and 'weight' in name:
+                truncated_normal_(param.data, mean=0, std=0.1)
+            else:
+                nn.init.constant_(param.data, 0.1)
+
+    def forward(self, sequential_embeddings):
+
+        sequential_embeddings_pool = torch.mean(sequential_embeddings, dim=1)
+
+        # First Level
+        first_att_weight, first_att_out = self.first_attention(sequential_embeddings)
+        first_local_input = torch.cat((sequential_embeddings_pool, first_att_out), dim=1)
+        first_local_fc_out = self.first_fc(first_local_input)
+        first_logits, first_scores, first_visual = self.first_local(first_local_fc_out, first_att_weight)
+
+        # Second Level
+        second_att_input = torch.mul(sequential_embeddings, first_visual.unsqueeze(-1))
+        second_att_weight, second_att_out = self.second_attention(second_att_input)
+        second_local_input = torch.cat((sequential_embeddings_pool, second_att_out), dim=1)
+        second_local_fc_out = self.second_fc(second_local_input)
+        second_logits, second_scores, second_visual = self.second_local(second_local_fc_out, second_att_weight)
+
+        # Third Level
+        third_att_input = torch.mul(sequential_embeddings, second_visual.unsqueeze(-1))
+        third_att_weight, third_att_out = self.third_attention(third_att_input)
+        third_local_input = torch.cat((sequential_embeddings_pool, third_att_out), dim=1)
+        third_local_fc_out = self.third_fc(third_local_input)
+        third_logits, third_scores, third_visual = self.third_local(third_local_fc_out, third_att_weight)
+
+        # Concat
+        # shape of ham_out: [batch_size, fc_hidden_size * 3]
+        ham_out = torch.cat((first_local_fc_out, second_local_fc_out,
+                             third_local_fc_out), dim=1)
+
+        # Fully Connected Layer
+        fc_out = self.fc(ham_out)
+
+        # Highway Layer and Dropout
+        highway_g = torch.relu(self.highway_lin(fc_out))
+        highway_t = torch.sigmoid(self.highway_gate(fc_out))
+        highway_output = torch.mul(highway_g, highway_t) + torch.mul((1 - highway_t), fc_out)
+        h_drop = self.dropout(highway_output)
+
+        # Global scores
+        global_logits = self.global_scores_fc(h_drop)
+        global_scores = torch.sigmoid(global_logits)
+        local_scores = torch.cat((first_scores, second_scores, third_scores), dim=1)
+        scores = self.beta * global_scores + (1 - self.beta) * local_scores
+        return HAMOutput(
+            scores=scores,
+            first_att_weight=first_att_weight,
+            first_visual=first_visual,
+            second_visual=second_visual,
+            third_visual=third_visual,
+            first_logits=first_logits,
+            second_logits=second_logits,
+            third_logits=third_logits,
+            global_logits=global_logits,
+            first_scores=first_scores,
+            second_scores=second_scores
+        )
diff --git a/EduNLP/ModelZoo/rnn/rnn.py b/EduNLP/ModelZoo/rnn/rnn.py
index 99767387..79f3ef27 100644
--- a/EduNLP/ModelZoo/rnn/rnn.py
+++ b/EduNLP/ModelZoo/rnn/rnn.py
@@ -1,12 +1,19 @@
-# coding: utf-8
-# 2021/7/12 @ tongshiwei
-
 import torch
 from torch import nn
 from torch.nn.utils.rnn import pad_packed_sequence, pack_padded_sequence
 from baize.torch import load_net
 import torch.nn.functional as F
 import json
+import os
+from typing import List
+from transformers.modeling_outputs import ModelOutput
+from transformers import PretrainedConfig
+from typing import Optional
+from ..base_model import BaseModel
+from ..utils import torch_utils as mytorch
+from .harnn import HAM
+
+__all__ = ["LM", "ElmoLM", "ElmoLMForPreTraining", "ElmoLMForPropertyPrediction", "ElmoLMForKnowledgePrediction"]
 
 
 class LM(nn.Module):
@@ -45,10 +52,11 @@ class LM(nn.Module):
     """
 
     def __init__(self, rnn_type: str, vocab_size: int, embedding_dim: int, hidden_size: int, num_layers=1,
-                 bidirectional=False, embedding=None, model_params=None, **kwargs):
+                 bidirectional=False, embedding=None, model_params=None, use_pack_pad=True, **kwargs):
         super(LM, self).__init__()
         rnn_type = rnn_type.upper()
         self.embedding = torch.nn.Embedding(vocab_size, embedding_dim) if embedding is None else embedding
+        self.use_pack_pad = use_pack_pad
         self.c = False
         if rnn_type == "RNN":
             self.rnn = torch.nn.RNN(
@@ -95,29 +103,58 @@ def forward(self, seq_idx, seq_len):
             a PackedSequence object
         """
         seq = self.embedding(seq_idx)
-        pack = pack_padded_sequence(seq, seq_len.cpu(), batch_first=True, enforce_sorted=False)
-        h0 = torch.zeros(self.num_layers, seq.shape[0], self.hidden_size)
+        if self.use_pack_pad:
+            seq_or_pack = pack_padded_sequence(seq, seq_len.cpu(), batch_first=True, enforce_sorted=False)
+        else:
+            seq_or_pack = seq
+        h0 = torch.zeros(self.num_layers, seq.shape[0], self.hidden_size).to(seq_idx.device)
         if self.c is True:
             c0 = torch.zeros(self.num_layers, seq.shape[0], self.hidden_size).to(seq_idx.device)
-            output, (hn, _) = self.rnn(pack, (h0, c0))
+            output, (hn, _) = self.rnn(seq_or_pack, (h0, c0))
         else:
-            output, hn = self.rnn(pack, h0)
-        output, _ = pad_packed_sequence(output, batch_first=True)
+            output, hn = self.rnn(seq_or_pack, h0)
+        if self.use_pack_pad:
+            output, _ = pad_packed_sequence(output, batch_first=True)
+
         return output, hn
 
 
-class ElmoLM(nn.Module):
-    def __init__(self, vocab_size: int, embedding_dim: int, hidden_size: int, dropout_rate: float = 0.5,
-                 batch_first=True):
+class ElmoLMOutput(ModelOutput):
+    """
+    Output type of [`ElmoLM`]
+
+    Parameters
+    ----------
+    pred_forward: of shape (batch_size, sequence_length)
+    pred_backward: of shape (batch_size, sequence_length)
+    forward_output: of shape (batch_size, sequence_length, hidden_size)
+    backward_output: of shape (batch_size, sequence_length, hidden_size)
+    """
+    pred_forward: torch.FloatTensor = None
+    pred_backward: torch.FloatTensor = None
+    forward_output: torch.FloatTensor = None
+    backward_output: torch.FloatTensor = None
+
+
+class ElmoLM(BaseModel):
+    base_model_prefix = 'elmo'
+
+    def __init__(self, vocab_size: int, embedding_dim: int, hidden_size: int, num_layers: int = 2,
+                 dropout_rate: float = 0.5, use_pack_pad=False, **kwargs):
         super(ElmoLM, self).__init__()
-        self.LM_layer = LM("BiLSTM", vocab_size, embedding_dim, hidden_size, num_layers=2, batch_first=batch_first)
+        self.LM_layer = LM("BiLSTM", vocab_size, embedding_dim, hidden_size, num_layers=num_layers,
+                           use_pack_pad=use_pack_pad, **kwargs)
         self.pred_layer = nn.Linear(hidden_size, vocab_size)
         self.vocab_size = vocab_size
         self.embedding_dim = embedding_dim
         self.hidden_size = hidden_size
         self.dropout = nn.Dropout(dropout_rate)
+        self.config = {k: v for k, v in locals().items() if k != "self" and k != "__class__" and k != "kwargs"}
+        self.config.update(kwargs)
+        self.config['architecture'] = 'ElmoLM'
+        self.config = PretrainedConfig.from_dict(self.config)
 
-    def forward(self, seq_idx, seq_len):
+    def forward(self, seq_idx=None, seq_len=None) -> ModelOutput:
         """
         Parameters
         ----------
@@ -128,17 +165,318 @@ def forward(self, seq_idx, seq_len):
 
         Returns
         ----------
-        pred_forward: of shape (batch_size, sequence_length)
-        pred_backward: of shape (batch_size, sequence_length)
-        forward_output: of shape (batch_size, sequence_length, hidden_size)
-        backward_output: of shape (batch_size, sequence_length, hidden_size)
+        ElmoLMOutput
+            pred_forward: of shape (batch_size, sequence_length)
+            pred_backward: of shape (batch_size, sequence_length)
+            forward_output: of shape (batch_size, sequence_length, hidden_size)
+            backward_output: of shape (batch_size, sequence_length, hidden_size)
         """
         lm_output, _ = self.LM_layer(seq_idx, seq_len)
         forward_output = lm_output[:, :, :self.hidden_size]
         backward_output = lm_output[:, :, self.hidden_size:]
         forward_output = self.dropout(forward_output)
         backward_output = self.dropout(backward_output)
-        pred_forward = F.softmax(input=self.pred_layer(forward_output), dim=-1)
-        pred_backward = F.softmax(input=self.pred_layer(backward_output), dim=-1)
+        pred_forward = self.pred_layer(forward_output)
+        pred_backward = self.pred_layer(backward_output)
+
+        return ElmoLMOutput(
+            pred_forward=pred_forward,
+            pred_backward=pred_backward,
+            forward_output=forward_output,
+            backward_output=backward_output
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                vocab_size=model_config['vocab_size'],
+                embedding_dim=model_config['embedding_dim'],
+                hidden_size=model_config['hidden_size'],
+                dropout_rate=model_config['dropout_rate'],
+                batch_first=model_config['batch_first']
+            )
+
+
+class ElmoLMForPreTrainingOutput(ModelOutput):
+    """
+    Output type of [`ElmoLMForPreTraining`].
+
+    Parameters
+    ----------
+    loss:
+    pred_forward: of shape (batch_size, sequence_length)
+    pred_backward: of shape (batch_size, sequence_length)
+    forward_output: of shape (batch_size, sequence_length, hidden_size)
+    backward_output: of shape (batch_size, sequence_length, hidden_size)
+    """
+    loss: torch.FloatTensor = None
+    pred_forward: torch.FloatTensor = None
+    pred_backward: torch.FloatTensor = None
+    forward_output: torch.FloatTensor = None
+    backward_output: torch.FloatTensor = None
 
-        return pred_forward, pred_backward, forward_output, backward_output
+
+class ElmoLMForPreTraining(BaseModel):
+    base_model_prefix = 'elmo'
+
+    def __init__(self, vocab_size: int, embedding_dim: int, hidden_size: int, dropout_rate: float = 0.5,
+                 batch_first=True, use_pack_pad=False, **kwargs):
+        super(ElmoLMForPreTraining, self).__init__()
+        self.elmo = ElmoLM(
+            vocab_size=vocab_size,
+            embedding_dim=embedding_dim,
+            hidden_size=hidden_size,
+            dropout_rate=dropout_rate,
+            batch_first=batch_first,
+            use_pack_pad=use_pack_pad,
+            **kwargs
+        )
+        self.vocab_size = vocab_size
+        self.embedding_dim = embedding_dim
+        self.hidden_size = hidden_size
+        self.criterion = nn.CrossEntropyLoss()
+
+        self.config = {k: v for k, v in locals().items() if k != "self" and k != "__class__" and k != "kwargs"}
+        self.config.update(kwargs)
+        self.config['architecture'] = 'ElmoLMForPreTraining'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self, seq_idx=None, seq_len=None) -> ModelOutput:
+        """
+
+        Parameters
+        ----------
+        seq_idx:Tensor, of shape (batch_size, sequence_length)
+            a list of indices
+        seq_len:Tensor, of shape (batch_size)
+            length
+        pred_mask : Tensor, of shape(batch_size, sequence_length)
+        idx_mask : Tensor, of shape (batch_size, sequence_length)
+
+        Returns
+        -------
+        ElmoLMForPreTrainingOutput
+            loss
+            pred_forward: of shape (batch_size, sequence_length)
+            pred_backward: of shape (batch_size, sequence_length)
+            forward_output: of shape (batch_size, sequence_length, hidden_size)
+            backward_output: of shape (batch_size, sequence_length, hidden_size)
+        """
+        batch_size, idx_len = seq_idx.shape
+        max_len = seq_len.max().item() if self.config.use_pack_pad is True else idx_len
+        # Note:
+        # pred_mask matters when LM use pack_pad,
+        # but it will break down for parallel GPU because of different seq_len between gpus
+        pred_mask = torch.arange(max_len, device=seq_idx.device)[None, :] < seq_len[:, None]
+        idx_mask = torch.arange(idx_len, device=seq_idx.device)[None, :] < seq_len[:, None]
+
+        pred_forward_mask = pred_mask.clone()
+        pred_forward_mask[torch.arange(batch_size).unsqueeze(1), seq_len.unsqueeze(1) - 1] = False
+        pred_backward_mask = pred_mask.clone()
+        pred_backward_mask[torch.arange(batch_size).unsqueeze(1), 0] = False
+
+        idx_forward_mask = idx_mask.clone()
+        idx_forward_mask[torch.arange(batch_size).unsqueeze(1), 0] = False
+        idx_backward_mask = idx_mask.clone()
+        idx_backward_mask[torch.arange(batch_size).unsqueeze(1), seq_len.unsqueeze(1) - 1] = False
+
+        outputs = self.elmo(seq_idx, seq_len)
+        pred_forward, pred_backward = outputs.pred_forward, outputs.pred_backward
+
+        flat_pred_forward = pred_forward[pred_forward_mask]
+        flat_pred_backward = pred_backward[pred_backward_mask]
+
+        # _, flat_pred_idx_forward = torch.max(flat_pred_forward, dim=1)
+        # _, flat_pred_idx_backward = torch.max(flat_pred_backward, dim=1)
+
+        flat_y_backward = seq_idx[idx_backward_mask]
+        flat_y_forward = seq_idx[idx_forward_mask]
+
+        # diff_forward = torch.sum(flat_pred_idx_forward - flat_y_forward)
+        # diff_backward = torch.sum(flat_pred_idx_backward - flat_y_backward)
+
+        forward_loss = self.criterion(flat_pred_forward, flat_y_forward)
+        backward_loss = self.criterion(flat_pred_backward, flat_y_backward)
+        loss = forward_loss + backward_loss
+        return ElmoLMForPreTrainingOutput(
+            loss=loss,
+            pred_forward=pred_forward,
+            pred_backward=pred_backward,
+            forward_output=outputs.forward_output,
+            backward_output=outputs.backward_output
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                vocab_size=model_config['vocab_size'],
+                embedding_dim=model_config['embedding_dim'],
+                hidden_size=model_config['hidden_size'],
+                dropout_rate=model_config['dropout_rate'],
+                batch_first=model_config['batch_first']
+            )
+
+
+class PropertyPredictionOutput(ModelOutput):
+    loss: torch.FloatTensor = None
+    logits: torch.FloatTensor = None
+
+
+class ElmoLMForPropertyPrediction(BaseModel):
+    base_model_prefix = 'elmo'
+
+    def __init__(self, vocab_size: int, embedding_dim: int, hidden_size: int, dropout_rate: float = 0.5,
+                 batch_first=True, head_dropout=0.5, **kwargs):
+        super(ElmoLMForPropertyPrediction, self).__init__()
+
+        self.elmo = ElmoLM(
+            vocab_size=vocab_size,
+            embedding_dim=embedding_dim,
+            hidden_size=hidden_size,
+            dropout_rate=dropout_rate,
+            batch_first=batch_first
+        )
+        self.head_dropout = head_dropout
+        self.dropout = nn.Dropout(head_dropout)
+        self.classifier = nn.Linear(2 * hidden_size, 1)
+        self.sigmoid = nn.Sigmoid()
+        self.criterion = nn.MSELoss()
+
+        self.config = {k: v for k, v in locals().items() if k != "self" and k != "__class__" and k != "kwargs"}
+        self.config.update(kwargs)
+        self.config['architecture'] = 'ElmoLMForPreTraining'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self, seq_idx=None, seq_len=None, labels=None) -> ModelOutput:
+        outputs = self.elmo(seq_idx, seq_len)
+        item_embeds = torch.cat(
+            (outputs.forward_output[torch.arange(len(seq_len)), torch.tensor(seq_len) - 1],
+             outputs.backward_output[torch.arange(len(seq_len)), 0]),
+            dim=-1)
+        item_embeds = self.dropout(item_embeds)
+
+        logits = self.sigmoid(self.classifier(item_embeds))
+        loss = None
+        if labels is not None:
+            loss = self.criterion(logits, labels)
+        return PropertyPredictionOutput(
+            loss=loss,
+            logits=logits
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                vocab_size=model_config.get('vocab_size'),
+                embedding_dim=model_config.get('embedding_dim'),
+                hidden_size=model_config.get('hidden_size'),
+                dropout_rate=model_config.get('dropout_rate'),
+                batch_first=model_config.get('batch_first'),
+                head_dropout=model_config.get('head_dropout', 0.5),
+            )
+
+
+class KnowledgePredictionOutput(ModelOutput):
+    loss: torch.FloatTensor = None
+    logits: torch.FloatTensor = None
+
+
+class ElmoLMForKnowledgePrediction(BaseModel):
+    base_model_prefix = 'elmo'
+
+    def __init__(self, vocab_size: int,
+                 embedding_dim: int,
+                 hidden_size: int,
+                 num_classes_list: List[int],
+                 num_total_classes: int,
+                 dropout_rate: float = 0.5,
+                 batch_first=True,
+                 head_dropout: Optional[float] = 0.5,
+                 flat_cls_weight: Optional[float] = 0.5,
+                 attention_unit_size: Optional[int] = 256,
+                 fc_hidden_size: Optional[int] = 512,
+                 beta: Optional[float] = 0.5,
+                 **kwargs):
+        super(ElmoLMForKnowledgePrediction, self).__init__()
+
+        self.elmo = ElmoLM(
+            vocab_size=vocab_size,
+            embedding_dim=embedding_dim,
+            hidden_size=hidden_size,
+            dropout_rate=dropout_rate,
+            batch_first=batch_first
+        )
+        self.head_dropout = head_dropout
+        self.dropout = nn.Dropout(head_dropout)
+        self.sigmoid = nn.Sigmoid()
+        self.criterion = nn.MSELoss()
+        self.flat_classifier = nn.Linear(in_features=2 * hidden_size, out_features=num_total_classes)
+        self.ham_classifier = HAM(
+            num_classes_list=num_classes_list,
+            num_total_classes=num_total_classes,
+            sequence_model_hidden_size=hidden_size * 2,
+            attention_unit_size=attention_unit_size,
+            fc_hidden_size=fc_hidden_size,
+            beta=beta,
+            dropout_rate=dropout_rate
+        )
+        self.flat_cls_weight = flat_cls_weight
+        self.num_classes_list = num_classes_list
+        self.num_total_classes = num_total_classes
+
+        self.config = {k: v for k, v in locals().items() if k != "self" and k != "__class__" and k != "kwargs"}
+        self.config.update(kwargs)
+        self.config['architecture'] = 'ElmoLMForPreTraining'
+        self.config = PretrainedConfig.from_dict(self.config)
+
+    def forward(self, seq_idx=None, seq_len=None, labels=None) -> ModelOutput:
+        outputs = self.elmo(seq_idx, seq_len)
+        item_embeds = torch.cat(
+            (outputs.forward_output[torch.arange(len(seq_len)), torch.tensor(seq_len) - 1],
+             outputs.backward_output[torch.arange(len(seq_len)), 0]),
+            dim=-1)
+        tokens_embeds = torch.cat((outputs.forward_output, outputs.backward_output), dim=-1)
+        item_embeds = self.dropout(item_embeds)
+        tokens_embeds = self.dropout(tokens_embeds)
+        flat_logits = self.sigmoid(self.flat_classifier(item_embeds))
+        ham_outputs = self.ham_classifier(tokens_embeds)
+        ham_logits = self.sigmoid(ham_outputs.scores)
+        logits = self.flat_cls_weight * flat_logits + (1 - self.flat_cls_weight) * ham_logits
+        loss = None
+        if labels is not None:
+            labels = torch.sum(torch.nn.functional.one_hot(labels, num_classes=self.num_total_classes), dim=1)
+            labels = labels.float()
+            loss = self.criterion(logits, labels)
+        return KnowledgePredictionOutput(
+            loss=loss,
+            logits=logits
+        )
+
+    @classmethod
+    def from_config(cls, config_path, **kwargs):
+        with open(config_path, "r", encoding="utf-8") as rf:
+            model_config = json.load(rf)
+            model_config.update(kwargs)
+            return cls(
+                vocab_size=model_config.get('vocab_size'),
+                embedding_dim=model_config.get('embedding_dim'),
+                hidden_size=model_config.get('hidden_size'),
+                num_total_classes=model_config.get('num_total_classes'),
+                num_classes_list=model_config.get('num_classes_list'),
+                dropout_rate=model_config.get('dropout_rate'),
+                batch_first=model_config.get('batch_first'),
+                head_dropout=model_config.get('head_dropout', 0.5),
+                flat_cls_weight=model_config.get('flat_cls_weight', 0.5),
+                attention_unit_size=model_config.get('attention_unit_size', 256),
+                fc_hidden_size=model_config.get('fc_hidden_size', 512),
+                beta=model_config.get('beta', 0.5),
+            )
diff --git a/EduNLP/ModelZoo/utils/__init__.py b/EduNLP/ModelZoo/utils/__init__.py
index 6ac5e86e..3751fcb8 100644
--- a/EduNLP/ModelZoo/utils/__init__.py
+++ b/EduNLP/ModelZoo/utils/__init__.py
@@ -6,3 +6,4 @@
 from .masker import Masker
 from .data import load_items
 from .modules import MLP, TextCNN
+from .torch_utils import *
diff --git a/EduNLP/ModelZoo/utils/torch_utils.py b/EduNLP/ModelZoo/utils/torch_utils.py
new file mode 100644
index 00000000..79ddd6e7
--- /dev/null
+++ b/EduNLP/ModelZoo/utils/torch_utils.py
@@ -0,0 +1,74 @@
+import torch
+
+
+def sequence_mask(lengths, max_len=None):
+    """Same as tf.sequence_mask, Returns a mask tensor representing the first N positions of each cell.
+
+    Parameters
+    ----------
+    lengths : _type_
+        integer tensor, all its values <= maxlen.
+    max_len : _type_, optional
+        scalar integer tensor, size of last dimension of returned tensor. Default is the maximum value in lengths.
+
+    Returns
+    -------
+    _type_
+        A mask tensor of shape lengths.shape + (maxlen,)
+
+    Examples:
+    ---------
+    >>> sequence_mask(torch.tensor([1, 3, 2]), 5)
+    tensor([[ True, False, False, False, False],
+            [ True,  True,  True, False, False],
+            [ True,  True, False, False, False]])
+    >>> sequence_mask(torch.tensor([[1, 3],[2,0]]))
+    tensor([[[ True, False, False],
+             [ True,  True,  True]],
+    <BLANKLINE>
+            [[ True,  True, False],
+             [False, False, False]]])
+    """
+
+    lengths_shape = lengths.shape  # torch.size() is a tuple
+    lengths = lengths.reshape(-1)
+
+    batch_size = lengths.numel()
+    max_len = max_len or int(lengths.max())
+    lengths_shape += (max_len,)
+
+    return (torch.arange(0, max_len, device=lengths.device)
+            .type_as(lengths)
+            .unsqueeze(0).expand(batch_size, max_len)
+            .lt(lengths.unsqueeze(1))).reshape(lengths_shape)
+
+
+def gather_nd(params, indices):
+    """_summary_
+
+    Parameters
+    ----------
+    params : _type_
+        _description_
+    indices : _type_
+        _description_
+
+    Returns
+    -------
+    _type_
+        _description_
+
+    Examples:
+    ---------
+    >>> gather_nd(
+    ...           params=torch.tensor([[1, 2, 3],
+    ...                                [4, 5, 6]]),
+    ...           indices=torch.tensor([[1],
+    ...                                 [0]]))
+    tensor([[4, 5, 6],
+            [1, 2, 3]])
+    """
+    newshape = indices.shape[:-1] + params.shape[indices.shape[-1]:]
+    indices = indices.view(-1, indices.shape[-1]).tolist()
+    out = torch.cat([params.__getitem__(tuple(i)) for i in indices])
+    return out.reshape(newshape)
diff --git a/EduNLP/Pipeline/__init__.py b/EduNLP/Pipeline/__init__.py
new file mode 100644
index 00000000..bca754b1
--- /dev/null
+++ b/EduNLP/Pipeline/__init__.py
@@ -0,0 +1,89 @@
+from .base import Pipeline, PreProcessingPipeline
+from .mappings import TASK_MAPPING, TOKENIZER_MAPPING_NAMES
+from .property_prediction import PropertyPredictionPipeline
+from .knowledge_prediction import KnowledgePredictionPipeline
+from ..Pretrain import PretrainedEduTokenizer
+from ..ModelZoo.base_model import BaseModel
+from ..Vector.t2v import get_pretrained_model_info
+from ..constant import MODEL_DIR
+from EduData import get_data
+from typing import Optional, Union, List
+
+__all__ = ["pipeline"]
+
+SUPPORTED_TASKS = {
+    "pre-process": {
+        "impl": Pipeline,
+        "default": None
+    },
+    "property-prediction": {
+        "impl": PropertyPredictionPipeline,
+        "default": "elmo_for_property_prediction_test_256"
+    },
+    "knowledge-prediction": {
+        "impl": KnowledgePredictionPipeline,
+        "default": "elmo_for_knowledge_prediction_test_256"
+    }
+}
+
+
+def pipeline(
+        task: str = None,
+        model: Optional[Union[BaseModel, str]] = None,
+        tokenizer: Optional[PretrainedEduTokenizer] = None,
+        pipeline_class: Optional[Pipeline] = None,
+        preprocess: Optional[List] = None,
+        **kwargs
+):
+    """
+    Parameters
+    ----------
+    task: str, required
+    model: BaseModel or str, optional
+
+    tokenizer: PretrainedEduTokenizer, optional
+
+    pipeline_class: Pipeline, optional
+        to specify Pipeline class
+    preprocess: list, optional
+        a list of names of pre-process pipes
+
+    Examples
+    ----------
+    >>> processor = pipeline(task="property-prediction") # doctest: +SKIP
+    >>> item = "如图所示，则三角形ABC的面积是_。"
+    >>> processor(item) # doctest: +SKIP
+    """
+    if preprocess is None and task is None and model is None:
+        raise RuntimeError("Please specify at least the model to use or task to do!")
+    elif model is None and tokenizer is not None:
+        raise RuntimeError("Specified tokenizer but no model is not allowed!")
+    elif task is None and model is not None:
+        raise RuntimeError("Please specify the task.")
+    elif task is None:
+        task = "pre-process"
+
+    if task == "pre-process":
+        return PreProcessingPipeline(pipe_names=preprocess)
+
+    if task in SUPPORTED_TASKS:
+        targeted_task = SUPPORTED_TASKS[task]
+    else:
+        raise KeyError(f"Unknown task {task}")
+    if pipeline_class is None:
+        pipeline_class = targeted_task["impl"]
+    if model is None or isinstance(model, str):
+        # TODO: 1. waiting for ModelHub and TEST
+        #       2. Check if the specified model and task are matched
+        # pretrained_name = targeted_task["default"] if model is None else model
+        # model_url, model_name, *args = get_pretrained_model_info(pretrained_name)
+        # model_path = get_data(model_url, MODEL_DIR)
+        # model = TASK_MAPPING[task][model_name].from_pretrained(model_path)
+        # tokenizer = TOKENIZER_MAPPING_NAMES[model_name].from_pretrained(model_path)
+        pass
+    elif isinstance(model, BaseModel) and isinstance(tokenizer, PretrainedEduTokenizer):
+        model, tokenizer = model, tokenizer
+    elif model is not None and tokenizer is not None:
+        raise KeyError(f"Unknown model and tokenizer: {model} and {tokenizer}")
+
+    return pipeline_class(model=model, task=task, tokenizer=tokenizer, preproc_pipe_names=preprocess, **kwargs)
diff --git a/EduNLP/Pipeline/base.py b/EduNLP/Pipeline/base.py
new file mode 100644
index 00000000..118031f9
--- /dev/null
+++ b/EduNLP/Pipeline/base.py
@@ -0,0 +1,346 @@
+import torch
+from EduNLP import logger
+from typing import Union, List, Callable, Optional, Dict, Any, Tuple
+from .components import PREPROCESSING_PIPES
+from ..Pretrain import PretrainedEduTokenizer
+from ..ModelZoo.base_model import BaseModel
+from transformers.modeling_outputs import ModelOutput
+from abc import ABC, abstractmethod
+
+GenericTensor = Union["torch.Tensor", List["GenericTensor"]]
+
+
+class PreProcessingPipeline(object):
+    """
+    A pipeline for tokenization processing.
+    You should use it by calling pipeline('pre-process'), instead of itself directly.
+
+    Parameters
+    ----------
+    pipe_names: `str` or `List[str]`, optional
+        The quickly initialized pipeline components. For availabel pipes, check TOKENIZE_PIPES in `components`.
+        To add componets more flexiblely with specific arguments or custom name, use `add_pipe`.
+
+    Examples
+    ----------
+    >>> tkn = PreProcessingPipeline(['is_sif', 'to_sif', 'is_sif', 'seg_describe'])
+    >>> tkn.add_pipe(name='seg', symbol='fm', before='seg_describe')
+    >>> tkn.component_names
+    ['is_sif', 'to_sif', 'is_sif', 'seg', 'seg_describe']
+    >>> item = "如图所示，则三角形ABC的面积是_。"
+    >>> tkn(item)
+    False
+    True
+    {'t': 3, 'f': 1, 'g': 0, 'm': 1}
+    ['如图所示，则三角形', '[FORMULA]', '的面积是', '[MARK]', '。']
+    >>> tkn.rename_pipe(0, 'is_sif_lol')
+    >>> tkn.add_pipe('to_sif', component=lambda x:x, first=True) # This won't succeed for the same name pipe exists
+    >>> tkn.add_pipe('identify', component=lambda x:x, before=1)
+    >>> tkn.component_names
+    ['is_sif_lol', 'identify', 'to_sif', 'is_sif_lol', 'seg', 'seg_describe']
+    """
+
+    def __init__(self,
+                 pipe_names: Optional[Union[List[str], str]] = None
+                 ):
+        self._preproc_components = {}
+        self.component_pipeline = []
+        if isinstance(pipe_names, list) and len(pipe_names) > 0:
+            if any(comp_name not in PREPROCESSING_PIPES for comp_name in pipe_names):
+                logger.error('Some components not existed!')
+                raise ValueError
+            for pipe_name in pipe_names:
+                if pipe_name not in self._preproc_components:
+                    self._preproc_components[pipe_name] = PREPROCESSING_PIPES[pipe_name]()
+            self.component_pipeline += [comp_name for comp_name in pipe_names]
+
+    def __call__(self, inputs):
+        for name in self.component_pipeline:
+            proc = self._preproc_components[name]
+            try:
+                inputs = proc(inputs)
+            except Exception as e:
+                logger.error(e)
+        return inputs
+
+    def __len__(self):
+        return len(self.component_pipeline)
+
+    def _get_pipe_index(
+            self,
+            before: Optional[Union[str, int]] = None,
+            after: Optional[Union[str, int]] = None,
+            first: Optional[bool] = None,
+            last: Optional[bool] = None
+    ):
+        if sum(arg is not None for arg in [before, after, first, last]) > 1:
+            logger.error('Only one of before/after/first/last can be set!')
+            raise ValueError
+        if last or not any(arg is not None for arg in [before, after, first]):
+            return len(self)
+        elif first:
+            return 0
+        elif isinstance(before, str):
+            if before not in self.component_pipeline:
+                logger.error('The before pipe does not exists!')
+                raise ValueError
+            else:
+                return self.component_pipeline.index(before)
+        elif isinstance(before, int):
+            if before < 0 or before >= len(self.component_pipeline):
+                logger.error('The before index must be greater than 0 and less than current length!')
+                raise ValueError
+            else:
+                return before
+        elif isinstance(after, str):
+            if after not in self.component_pipeline:
+                logger.error('The after pipe does not exists!')
+                raise ValueError
+            else:
+                return self.component_pipeline.index(after) + 1
+        elif isinstance(after, int):
+            if after < 0 or after >= len(self.component_pipeline):
+                logger.error('The after index must be greater than 0 and less than current length!')
+                raise ValueError
+            else:
+                return after + 1
+        else:
+            raise ValueError
+
+    def add_pipe(
+            self,
+            name: str,
+            component: Optional[Callable] = None,
+            before: Optional[Union[str, int]] = None,
+            after: Optional[Union[str, int]] = None,
+            first: Optional[bool] = None,
+            last: Optional[bool] = None,
+            *args,
+            **kwargs
+    ):
+        """
+        Add a component to the tokenization pipeline.
+        Valid component must be Callable and feat its next component. Only one parameter of before/after/first/last
+        can be set. Default setting is `last`.
+        Notice:
+        1. Please try to avoid more than one usages of one same pipe, otherwise you can only modify them with index.
+            i.e. `before` and `after` works well only when the pipe is unique.
+        2. The `*args, **kwargs` parameters will be passed to component constructor in `PREPROCESSING_PIPES`,
+            and this only works when you do not give a callable component.
+
+        Parameters
+        ----------
+        name: `str`, required
+            the name of pipe
+        component: `Callable`, optional
+            the custom pipe component, be careful with its nearest components' input&output.
+        before: `str` or `int`, optional
+            name or index of the component to insert new component directly before. Index start from 0.
+        after: `str` or `int`, optional
+            name or index of the component to insert new component directly after. Index start from 0.
+        first: `bool`, optional
+            if true, insert the component first in the pipeline.
+        last: `bool`, optional
+            if true, insert the component last in the pipeline.
+        """
+        pipe_index = self._get_pipe_index(before, after, first, last)
+        if component is None and name not in self._preproc_components:
+            if name not in PREPROCESSING_PIPES:
+                logger.error(f'Unknown pipe "{name}"')
+                raise ValueError
+            else:
+                self._preproc_components[name] = PREPROCESSING_PIPES[name](*args, **kwargs)
+        else:
+            if name in self._preproc_components:
+                logger.warn(f'One preserved component "{name}" has the same name, inserting is stopped.')
+                return
+            self._preproc_components[name] = component
+        self.component_pipeline.insert(pipe_index, name)
+
+    def remove_pipe(
+            self,
+            pipe: Union[str, int]
+    ):
+        """
+        Remove a component from the pre-processing pipeline
+        """
+        if isinstance(pipe, str):
+            if pipe not in self._preproc_components:
+                logger.error(f'Unknown pipe "{pipe}"')
+                raise ValueError
+            self.component_pipeline.remove(pipe)
+            return self._preproc_components[pipe]
+        else:
+            removed = self.component_pipeline.pop(pipe)
+            return self._preproc_components[removed]
+
+    def rename_pipe(
+            self,
+            old_pipe: Union[str, int],
+            new_name: str,
+    ):
+        """
+        Rename a component from the pre-processing pipeline.
+
+        Parameters
+        ----------
+        old_pipe: `str` or `int`, required
+            old component name for `str`, or old component index in the pipeline for `int`
+        new_name: `str`, required
+            new name for the component
+        """
+        if isinstance(old_pipe, int):
+            old_pipe = self.component_pipeline[old_pipe]
+        if old_pipe not in self._preproc_components:
+            logger.error(f'Unknown pipe "{old_pipe}"')
+            raise ValueError
+        self._preproc_components[new_name] = self._preproc_components.pop(old_pipe)
+        self.component_pipeline = [new_name if i == old_pipe else i for i in self.component_pipeline]
+
+    @property
+    def component_names(self):
+        """
+        Get the names of pipeline components
+        """
+        return self.component_pipeline.copy()
+
+    @property
+    def pipeline(self):
+        """
+        Get the processing pipeline consisting of (name, component) tuples.
+        """
+        return [(name, self._preproc_components[name]) for name in self.component_pipeline]
+
+
+class Pipeline(ABC):
+    """
+    The pipeline class is the class from which all pipelines inherit. Pipeline workflow is defined as a sequence of the
+    following operations:
+
+        Input -> PreProcessingPipeline -> Tokenization -> Model Inference
+                                                    -> Post-Processing (downstream task dependent) -> Output
+
+    This class is not for using directly, refer to `Pipeline.__init__.pipeline` function.
+    """
+
+    def __init__(self,
+                 task: Optional[str] = None,
+                 model: Optional[BaseModel] = None,
+                 tokenizer: Optional[PretrainedEduTokenizer] = None,
+                 preproc_pipe_names: Optional[List] = None,
+                 **kwargs
+                 ):
+        if preproc_pipe_names is None:
+            preproc_pipe_names = []
+        self.preproc_pipeline = PreProcessingPipeline(preproc_pipe_names)
+        self.tokenizer = tokenizer
+        self.model = model
+        self.task = task
+
+        self._tokenize_params, self._forward_params, self._postprocess_params = self._sanitize_parameters(**kwargs)
+
+    def __len__(self):
+        _length = len(self.preproc_pipeline) + sum(
+            component is not None for component in [self.tokenizer, self.model, self.task])
+        return _length
+
+    @abstractmethod
+    def _sanitize_parameters(self, **pipeline_parameters: Dict):
+        """
+        _sanitize_parameters will be automatically called with any excessive named arguments
+        from either '__init__' and '__call__' methods.
+        Any inheritor of Pipeline should implement it, and it should return 3 dictionaries of parameters used by
+        '_tokenize', '_forward' and 'postprocess' methods
+        """
+        raise NotImplementedError("_sanitize_parameters not implemented")
+
+    @abstractmethod
+    def _tokenize(self, input_: Any, **tokenize_parameters: Dict) -> Dict[str, GenericTensor]:
+        """
+        _tokenize will take the `input_` of a specific pipeline, go through it on a tokenizer and return a dictionary
+        of everything necessary for `forward` to run properly.
+        """
+        raise NotImplementedError("_tokenize not implemented")
+
+    @abstractmethod
+    def _forward(self, input_: Dict[str, GenericTensor], **forward_parameters: Dict) -> ModelOutput:
+        """
+        _forward will receive the prepared dictionary from `tokenization` and run it on the model.
+        """
+        raise NotImplementedError("_forward not implemented")
+
+    @abstractmethod
+    def postprocess(self, model_outputs: ModelOutput, **postprocess_parameters: Dict) -> Any:
+        """
+        postprocess will receive the outputs of `_forward` method and reformat them into something more friendly
+        based on specific task.
+        """
+        raise NotImplementedError("postprocess not implemented")
+
+    def add_pipe(self, *args, **kwargs):
+        """
+        refer to PreProcessingPipeline.add_pipe
+        """
+        return self.preproc_pipeline.add_pipe(*args, **kwargs)
+
+    def remove_pipe(self, *args, **kwargs):
+        """
+        refer to PreProcessingPipeline.remove_pipe
+        """
+        return self.preproc_pipeline.remove_pipe(*args, **kwargs)
+
+    def rename_pipe(self, *args, **kwargs):
+        """
+        refer to PreProcessingPipeline.rename_pipe
+        """
+        return self.preproc_pipeline.rename_pipe(*args, **kwargs)
+
+    @property
+    def component_names(self):
+        """
+        Get the names of pipeline components
+        """
+        _component_names = self.preproc_pipeline.component_names.copy() if len(self.preproc_pipeline) > 0 else []
+        if self.tokenizer is not None:
+            _component_names.append("tokenizer")
+        if self.model is not None:
+            _component_names.append(self.model.__class__.__name__)
+        if self.task is not None:
+            _component_names.append(self.task)
+        return _component_names
+
+    @property
+    def pipeline(self):
+        """
+        Get the processing pipeline consisting of (name, component) tuples.
+        """
+        _pipeline = self.preproc_pipeline.pipeline if len(self.preproc_pipeline) > 0 else []
+        if self.tokenizer is not None:
+            _pipeline.append(("tokenizer", self.tokenizer))
+        if self.model is not None:
+            _pipeline.append((self.model.__class__.__name__, self.model))
+        if self.task is not None:
+            _pipeline.append((self.task, None))
+        return _pipeline
+
+    def __call__(self, inputs, *args, num_workers=None, **kwargs):
+        if args:
+            logger.warning(f"Ignoring args: {args}")
+        is_batch = isinstance(inputs, list)
+
+        tokenize_params, forward_params, postprocess_params = self._sanitize_parameters(**kwargs)
+        tokenize_params = {**self._tokenize_params, **tokenize_params}
+        forward_params = {**self._forward_params, **forward_params}
+        postprocess_params = {**self._postprocess_params, **postprocess_params}
+
+        if is_batch:
+            return [self.run_single(item, tokenize_params, forward_params, postprocess_params) for item in inputs]
+        else:
+            return self.run_single(inputs, tokenize_params, forward_params, postprocess_params)
+
+    def run_single(self, inputs, tokenize_params, model_params, postprocess_params):
+        tokenize_inputs = self.preproc_pipeline(inputs)
+        model_inputs = self._tokenize([tokenize_inputs], **tokenize_params)
+        model_outputs = self._forward(model_inputs, **model_params)
+        outputs = self.postprocess(model_outputs, **postprocess_params)
+        return outputs
diff --git a/EduNLP/Pipeline/components.py b/EduNLP/Pipeline/components.py
new file mode 100644
index 00000000..8381728c
--- /dev/null
+++ b/EduNLP/Pipeline/components.py
@@ -0,0 +1,93 @@
+from ..utils import dict2str4sif
+from ..SIF import is_sif, to_sif, sif4sci
+from ..SIF.segment import seg, SegmentList
+from ..Tokenizer import PureTextTokenizer
+from ..SIF.tokenization.text import tokenize
+
+
+class BasePipe:
+    def __init__(self, *args, **kwargs):
+        self.args = args
+        self.kwargs = kwargs
+
+    def __call__(self, input_):
+        raise NotImplementedError
+
+
+class IsSifPipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(IsSifPipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_):
+        print(is_sif(input_, *self.args, **self.kwargs))
+        return input_
+
+
+class ToSifPipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(ToSifPipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_):
+        return to_sif(input_, *self.args, **self.kwargs)
+
+
+class Dict2Str4SifPipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(Dict2Str4SifPipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_):
+        return dict2str4sif(input_, *self.args, **self.kwargs)
+
+
+class Sif4SciPipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(Sif4SciPipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_):
+        return sif4sci(input_, *self.args, **self.kwargs)
+
+
+class SegPipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(SegPipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_):
+        return seg(input_, *self.args, **self.kwargs)
+
+
+class SegDescribePipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(SegDescribePipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_: SegmentList):
+        print(input_.describe())
+        return input_
+
+
+class SegFilterPipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(SegFilterPipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_: SegmentList):
+        input_.filter(*self.args, **self.kwargs)
+        return input_
+
+
+class TokenizePipe(BasePipe):
+    def __init__(self, *args, **kwargs):
+        super(TokenizePipe, self).__init__(*args, **kwargs)
+
+    def __call__(self, input_):
+        return tokenize(input_, *self.args, **self.kwargs)
+
+
+PREPROCESSING_PIPES = {
+    'dict2str4sif': Dict2Str4SifPipe,
+    'is_sif': IsSifPipe,
+    'to_sif': ToSifPipe,
+    'sif4sci': Sif4SciPipe,
+    'seg': SegPipe,
+    'seg_describe': SegDescribePipe,
+    'seg_filter': SegFilterPipe,
+    'tokenize': TokenizePipe,
+}
diff --git a/EduNLP/Pipeline/knowledge_prediction.py b/EduNLP/Pipeline/knowledge_prediction.py
new file mode 100644
index 00000000..5930606e
--- /dev/null
+++ b/EduNLP/Pipeline/knowledge_prediction.py
@@ -0,0 +1,37 @@
+import torch
+
+from .base import Pipeline, GenericTensor
+from typing import Dict, Optional, Union
+from torch import sigmoid
+
+
+class KnowledgePredictionPipeline(Pipeline):
+    def __init__(self, **kwargs):
+        super(KnowledgePredictionPipeline, self).__init__(**kwargs)
+
+    def _sanitize_parameters(self, **pipeline_parameters):
+        tokenize_params, forward_params, postprocess_params = pipeline_parameters, {}, {}
+        return tokenize_params, forward_params, postprocess_params
+
+    def _tokenize(self, input_, **tokenize_parameters) -> Dict[str, GenericTensor]:
+        return self.tokenizer(input_, **tokenize_parameters)
+
+    def _forward(self, model_inputs, **forward_params):
+        return self.model(**model_inputs)
+
+    def postprocess(self, model_outputs, **postprocess_params):
+        if 'num_classes_list' not in dir(self.model) or 'num_total_classes' not in dir(self.model):
+            raise ValueError('model is not for knowledge prediction: ', self.model)
+        outputs = model_outputs["logits"][0]
+        start_idx = 0
+        knowledge_list = []
+        for num_classes in self.model.num_classes_list:
+            level_prediction = torch.argmax(outputs[start_idx:start_idx + num_classes]) + start_idx
+            knowledge_list.append(level_prediction)
+            start_idx += num_classes
+        outputs = outputs.detach().numpy()
+        dict_knowledge = {
+            "knowledge_list": knowledge_list,
+            "knowledge_scores": outputs.tolist(),
+        }
+        return dict_knowledge
diff --git a/EduNLP/Pipeline/mappings.py b/EduNLP/Pipeline/mappings.py
new file mode 100644
index 00000000..80870a92
--- /dev/null
+++ b/EduNLP/Pipeline/mappings.py
@@ -0,0 +1,32 @@
+from collections import OrderedDict
+from ..Pretrain import ElmoTokenizer, BertTokenizer, QuesNetTokenizer, DisenQTokenizer
+from ..ModelZoo.rnn import ElmoLMForPropertyPrediction, ElmoLMForKnowledgePrediction
+from ..ModelZoo.bert import BertForPropertyPrediction, BertForKnowledgePrediction
+
+TOKENIZER_MAPPING_NAMES = OrderedDict(
+    [
+        ("elmo", ElmoTokenizer),
+        ("bert", BertTokenizer),
+        ("quesnet", QuesNetTokenizer),
+        ("disenq", DisenQTokenizer)
+    ]
+)
+
+MODEL_FOR_PROPERTY_PREDICTION_MAPPING_NAMES = OrderedDict(
+    [
+        ("elmo", ElmoLMForPropertyPrediction),
+        ("bert", BertForPropertyPrediction),
+    ]
+)
+
+MODEL_FOR_KNOWLEDGE_PREDICTION_MAPPING_NAMES = OrderedDict(
+    [
+        ("elmo", ElmoLMForKnowledgePrediction),
+        ("bert", BertForKnowledgePrediction)
+    ]
+)
+
+TASK_MAPPING = {
+    "property-prediction": MODEL_FOR_PROPERTY_PREDICTION_MAPPING_NAMES,
+    "knowledge-prediction": MODEL_FOR_KNOWLEDGE_PREDICTION_MAPPING_NAMES
+}
diff --git a/EduNLP/Pipeline/property_prediction.py b/EduNLP/Pipeline/property_prediction.py
new file mode 100644
index 00000000..e40bedb5
--- /dev/null
+++ b/EduNLP/Pipeline/property_prediction.py
@@ -0,0 +1,23 @@
+from .base import Pipeline, GenericTensor
+from typing import Dict, Optional, Union
+
+
+class PropertyPredictionPipeline(Pipeline):
+    def __init__(self, **kwargs):
+        super(PropertyPredictionPipeline, self).__init__(**kwargs)
+
+    def _sanitize_parameters(self, **pipeline_parameters):
+        tokenize_params, forward_params, postprocess_params = pipeline_parameters, {}, {}
+        return tokenize_params, forward_params, postprocess_params
+
+    def _tokenize(self, input_, **tokenize_parameters) -> Dict[str, GenericTensor]:
+        return self.tokenizer(input_, **tokenize_parameters)
+
+    def _forward(self, model_inputs, **forward_params):
+        return self.model(**model_inputs)
+
+    def postprocess(self, model_outputs, **postprocess_params):
+        outputs = model_outputs["logits"]
+        outputs = outputs.detach().numpy()
+        dict_property = {"property": outputs.item()}
+        return dict_property
diff --git a/EduNLP/Pretrain/__init__.py b/EduNLP/Pretrain/__init__.py
index 427b57f5..5c736b66 100644
--- a/EduNLP/Pretrain/__init__.py
+++ b/EduNLP/Pretrain/__init__.py
@@ -2,7 +2,9 @@
 # 2021/5/29 @ tongshiwei
 
 from .gensim_vec import train_vector, GensimWordTokenizer, GensimSegTokenizer
-from .elmo_vec import ElmoTokenizer, ElmoDataset, train_elmo
-from .bert_vec import BertTokenizer, finetune_bert
+from .elmo_vec import *
+from .bert_vec import *
 from .quesnet_vec import QuesNetTokenizer, pretrain_quesnet, Question
 from .disenqnet_vec import DisenQTokenizer, train_disenqnet
+from .pretrian_utils import *
+from .hugginface_utils import *
diff --git a/EduNLP/Pretrain/bert_vec.py b/EduNLP/Pretrain/bert_vec.py
index 674f0d5c..94145c94 100644
--- a/EduNLP/Pretrain/bert_vec.py
+++ b/EduNLP/Pretrain/bert_vec.py
@@ -1,198 +1,272 @@
-import os
-import json
-from EduNLP import logger
-from EduNLP.Tokenizer import PureTextTokenizer, TOKENIZER
-from typing import Optional, Union
-from transformers import AutoTokenizer, AutoModelForMaskedLM
-from transformers import DataCollatorForLanguageModeling
-from transformers import Trainer, TrainingArguments
-from transformers.file_utils import TensorType
-from torch.utils.data import Dataset
-from EduNLP.SIF import Symbol, FORMULA_SYMBOL, FIGURE_SYMBOL, QUES_MARK_SYMBOL, TAG_SYMBOL, SEP_SYMBOL
-
-__all__ = ["BertTokenizer", "finetune_bert"]
-
-
-class BertTokenizer(object):
-    """
-
-    Parameters
-    ----------
-    pretrain_model:
-        used pretrained model
-    add_special_tokens:
-        Whether to add tokens like [FIGURE], [TAG], etc.
-    text_tokenizer:
-        Which text tokenizer to use.
-        Must be consistent with TOKENIZER dictionary.
-
-    Returns
-    ----------
-
-    Examples
-    ----------
-    >>> tokenizer = BertTokenizer(add_special_tokens=True)
-    >>> item = "有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
-    ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"
-    >>> token_item = tokenizer(item)
-    >>> print(token_item.input_ids[:10])
-    [101, 1062, 2466, 1963, 1745, 21129, 166, 117, 167, 5276]
-    >>> print(tokenizer.tokenize(item)[:10])
-    ['公', '式', '如', '图', '[FIGURE]', 'x', ',', 'y', '约', '束']
-    >>> items = [item, item]
-    >>> token_items = tokenizer(items, return_tensors='pt')
-    >>> print(token_items.input_ids.shape)
-    torch.Size([2, 27])
-    >>> print(len(tokenizer.tokenize(items)))
-    2
-    >>> tokenizer.save_pretrained('test_dir') # doctest: +SKIP
-    >>> tokenizer = BertTokenizer.from_pretrained('test_dir') # doctest: +SKIP
-    """
-
-    def __init__(self, pretrain_model="bert-base-chinese", add_special_tokens=False, text_tokenizer=None):
-        self.tokenizer = AutoTokenizer.from_pretrained(pretrain_model)
-        self.add_special_tokens = add_special_tokens
-        if add_special_tokens:
-            customize_tokens = []
-            for i in [FORMULA_SYMBOL, FIGURE_SYMBOL, QUES_MARK_SYMBOL, TAG_SYMBOL, SEP_SYMBOL]:
-                if i not in self.tokenizer.additional_special_tokens:
-                    customize_tokens.append(Symbol(i))
-            if customize_tokens:
-                self.tokenizer.add_special_tokens({'additional_special_tokens': customize_tokens})
-        if text_tokenizer:
-            assert text_tokenizer in TOKENIZER, f"text_tokenizer should be one of {list(TOKENIZER.keys())}"
-            self.text_tokenizer = TOKENIZER[text_tokenizer]()
-            self.text_tokenizer_name = text_tokenizer
-        else:
-            self.text_tokenizer = PureTextTokenizer()
-            self.text_tokenizer_name = 'pure_text'
-
-    def __call__(self, item: Union[list, str], return_tensors: Optional[Union[str, TensorType]] = None,
-                 *args, **kwargs):
-        if isinstance(item, str):
-            item = ''.join(next(self.text_tokenizer([item])))
-        else:
-            token_generation = self.text_tokenizer(item)
-            item = [''.join(next(token_generation)) for i in range(len(item))]
-        return self.tokenizer(item, truncation=True, padding=True, return_tensors=return_tensors)
-
-    def tokenize(self, item: Union[list, str], *args, **kwargs):
-        if isinstance(item, str):
-            item = ''.join(next(self.text_tokenizer([item])))
-            return self.tokenizer.tokenize(item)
-        else:
-            token_generation = self.text_tokenizer(item)
-            item = [''.join(next(token_generation)) for i in range(len(item))]
-            item = [self.tokenizer.tokenize(i) for i in item]
-            return item
-
-    def save_pretrained(self, tokenizer_config_dir):
-        self.tokenizer.save_pretrained(tokenizer_config_dir)
-        custom_config = {
-            'add_special_tokens': self.add_special_tokens,
-            'text_tokenizer': self.text_tokenizer_name
-        }
-        with open(os.path.join(tokenizer_config_dir, 'custom_config.json'), 'w') as f:
-            json.dump(custom_config, f, indent=2)
-
-    @classmethod
-    def from_pretrained(cls, tokenizer_config_dir):
-        custom_config_dir = os.path.join(tokenizer_config_dir, 'custom_config.json')
-        if os.path.exists(custom_config_dir):
-            with open(custom_config_dir, 'r') as f:
-                custom_config = json.load(f)
-            return cls(tokenizer_config_dir, custom_config['add_special_tokens'],
-                       custom_config['text_tokenizer'])
-        else:
-            return cls(tokenizer_config_dir)
-
-
-class FinetuneDataset(Dataset):
-    def __init__(self, items):
-        self.items = items
-        self.len = len(items)
-
-    def __getitem__(self, index):
-        return self.items[index]
-
-    def __len__(self):
-        return self.len
-
-
-def finetune_bert(items, output_dir, pretrain_model="bert-base-chinese", train_params=None):
-    """
-
-    Parameters
-    ----------
-    items：dict
-        the tokenization results of questions
-    output_dir: str
-        the path to save the model
-    pretrain_model: str
-        the name or path of pre-trained model
-    train_params: dict
-        the training parameters passed to Trainer
-
-    Examples
-    ----------
-    >>> tokenizer = BertTokenizer()
-    >>> stems = ["有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$",
-    ... "有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$"]
-    >>> token_item = [tokenizer(i) for i in stems]
-    >>> print(token_item[0].keys())
-    dict_keys(['input_ids', 'token_type_ids', 'attention_mask'])
-    >>> finetune_bert(token_item, "examples/test_model/data/data/bert") # doctest: +SKIP
-    {'train_runtime': ..., ..., 'epoch': 1.0}
-    """
-    model = AutoModelForMaskedLM.from_pretrained(pretrain_model)
-    tokenizer = BertTokenizer(pretrain_model, add_special_tokens=True)
-    # resize embedding for additional special tokens
-    model.resize_token_embeddings(len(tokenizer.tokenizer))
-
-    # training parameters
-    if train_params:
-        mlm_probability = train_params['mlm_probability'] if 'mlm_probability' in train_params else 0.15
-        epochs = train_params['epochs'] if 'epochs' in train_params else 1
-        batch_size = train_params['batch_size'] if 'batch_size' in train_params else 64
-        save_steps = train_params['save_steps'] if 'save_steps' in train_params else 100
-        save_total_limit = train_params['save_total_limit'] if 'save_total_limit' in train_params else 2
-        logging_steps = train_params['logging_steps'] if 'logging_steps' in train_params else 5
-        gradient_accumulation_steps = train_params['gradient_accumulation_steps'] \
-            if 'gradient_accumulation_steps' in train_params else 1
-    else:
-        # default
-        mlm_probability = 0.15
-        epochs = 1
-        batch_size = 64
-        save_steps = 1000
-        save_total_limit = 2
-        logging_steps = 5
-        gradient_accumulation_steps = 1
-
-    data_collator = DataCollatorForLanguageModeling(
-        tokenizer=tokenizer.tokenizer, mlm=True, mlm_probability=mlm_probability
-    )
-
-    dataset = FinetuneDataset(items)
-
-    training_args = TrainingArguments(
-        output_dir=output_dir,
-        overwrite_output_dir=True,
-        num_train_epochs=epochs,
-        per_device_train_batch_size=batch_size,
-        save_steps=save_steps,
-        save_total_limit=save_total_limit,
-        logging_steps=logging_steps,
-        gradient_accumulation_steps=gradient_accumulation_steps,
-    )
-
-    trainer = Trainer(
-        model=model,
-        args=training_args,
-        data_collator=data_collator,
-        tokenizer=tokenizer.tokenizer,
-        train_dataset=dataset,
-    )
-    trainer.train()
-    trainer.save_model(output_dir)
-    tokenizer.save_pretrained(output_dir)
+import os
+from typing import List, Union
+from transformers import BertForMaskedLM
+from transformers import DataCollatorForLanguageModeling, DataCollatorWithPadding
+from transformers import Trainer, TrainingArguments
+from copy import deepcopy
+
+from ..ModelZoo.bert import BertForPropertyPrediction, BertForKnowledgePrediction
+from .pretrian_utils import EduDataset
+from .hugginface_utils import TokenizerForHuggingface
+
+__all__ = ["BertTokenizer", "BertDataset", "finetune_bert", "finetune_bert_for_property_prediction",
+           "finetune_bert_for_knowledge_prediction"]
+
+DEFAULT_TRAIN_PARAMS = {
+    # default
+    "output_dir": None,
+    "num_train_epochs": 1,
+    "per_device_train_batch_size": 32,
+    # "per_device_eval_batch_size": 32,
+    # evaluation_strategy: "steps",
+    # eval_steps:200,
+    "save_steps": 1000,
+    "save_total_limit": 2,
+    # "load_best_model_at_end": True,
+    # metric_for_best_model: "loss",
+    # greater_is_better: False,
+    "logging_dir": None,
+    "logging_steps": 5,
+    "gradient_accumulation_steps": 1,
+    "learning_rate": 5e-5,
+    # disable_tqdm: True,
+    # no_cuda: True,
+}
+
+
+class BertTokenizer(TokenizerForHuggingface):
+    """
+    Examples
+    ----------
+    >>> tokenizer = BertTokenizer(add_special_tokens=True)
+    >>> item = "有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
+    ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"
+    >>> token_item = tokenizer(item)
+    >>> print(token_item.input_ids)
+    tensor([[ 101, 1062, 2466, 1963, 1745,  138,  100,  140,  166,  117,  167, 5276,
+             3338, 3340,  816, 1062, 2466,  102,  168,  134,  166,  116,  128,  167,
+             3297, 1920,  966,  138,  100,  140,  102]])
+    >>> print(tokenizer.tokenize(item)[:10])
+    ['公', '式', '如', '图', '[', '[UNK]', ']', 'x', ',', 'y']
+    >>> items = [item, item]
+    >>> token_items = tokenizer(items, return_tensors='pt')
+    >>> print(token_items.input_ids.shape)
+    torch.Size([2, 31])
+    >>> print(len(tokenizer.tokenize(items)))
+    2
+    >>> tokenizer.save_pretrained('test_dir') # doctest: +SKIP
+    >>> tokenizer = BertTokenizer.from_pretrained('test_dir') # doctest: +SKIP
+    """
+    pass
+
+
+class BertDataset(EduDataset):
+    pass
+
+
+def finetune_bert(items: Union[List[dict], List[str]], output_dir: str, pretrained_model="bert-base-chinese",
+                  tokenizer_params=None, data_params=None, model_params=None, train_params=None):
+    """
+    Parameters
+    ----------
+    items: list, required
+        The training corpus, each item could be str or dict
+    output_dir: str, required
+        The directory to save trained model files
+    pretrained_model: str, optional
+        The pretrained model name or path for model and tokenizer
+    eval_items: list, required
+        The evaluating items, each item could be str or dict
+    tokenizer_params: dict, optional, default=None
+        The parameters passed to ElmoTokenizer
+    data_params: dict, optional, default=None
+        The parameters passed to ElmoDataset and ElmoTokenizer
+    model_params: dict, optional, default=None
+        The parameters passed to Trainer
+    train_params: dict, optional, default=None
+
+    Examples
+    ----------
+    >>> stems = ["有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$",
+    ... "有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$"]
+    >>> finetune_bert(stems, "examples/test_model/data/data/bert") # doctest: +SKIP
+    {'train_runtime': ..., ..., 'epoch': 1.0}
+    """
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    # tokenizer configuration
+    if os.path.exists(pretrained_model):
+        tokenizer = BertTokenizer.from_pretrained(pretrained_model, **tokenizer_params)
+    else:
+        work_tokenizer_params = {
+            "add_specials": True,
+            "tokenize_method": "pure_text",
+        }
+        work_tokenizer_params.update(tokenizer_params)
+        tokenizer = BertTokenizer(pretrained_model, **work_tokenizer_params)
+        # TODO: tokenizer.set_vocab()
+    # model configuration
+    model = BertForMaskedLM.from_pretrained(pretrained_model, **model_params)
+    # resize embedding for additional special tokens
+    model.resize_token_embeddings(len(tokenizer.bert_tokenizer))
+
+    # dataset configuration
+    dataset = BertDataset(tokenizer, items=items,
+                          stem_key=data_params.get("stem_key", None))
+    mlm_probability = train_params.pop('mlm_probability', 0.15)
+    data_collator = DataCollatorForLanguageModeling(
+        tokenizer=tokenizer.bert_tokenizer, mlm=True, mlm_probability=mlm_probability
+    )
+    # training configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
+    if train_params is not None:
+        work_train_params.update(train_params if train_params else {})
+    train_args = TrainingArguments(**work_train_params)
+    trainer = Trainer(
+        model=model,
+        args=train_args,
+        data_collator=data_collator,
+        train_dataset=dataset,
+    )
+    trainer.train()
+    trainer.save_model(output_dir)
+    tokenizer.save_pretrained(output_dir)
+
+
+def finetune_bert_for_property_prediction(train_items,
+                                          output_dir,
+                                          pretrained_model="bert-base-chinese",
+                                          eval_items=None,
+                                          tokenizer_params=None,
+                                          data_params=None,
+                                          train_params=None,
+                                          model_params=None
+                                          ):
+    """
+    Parameters
+    ----------
+    train_items: list, required
+        The training corpus, each item could be str or dict
+    output_dir: str, required
+        The directory to save trained model files
+    pretrained_model: str, optional
+        The pretrained model name or path for model and tokenizer
+    eval_items: list, required
+        The evaluating items, each item could be str or dict
+    tokenizer_params: dict, optional, default=None
+        The parameters passed to ElmoTokenizer
+    data_params: dict, optional, default=None
+        The parameters passed to ElmoDataset and ElmoTokenizer
+    model_params: dict, optional, default=None
+        The parameters passed to Trainer
+    train_params: dict, optional, default=None
+    """
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    # tokenizer configuration
+    tokenizer = BertTokenizer.from_pretrained(pretrained_model, **tokenizer_params)
+    # dataset configuration
+    train_dataset = BertDataset(tokenizer=tokenizer, items=train_items,
+                                stem_key=data_params.get("stem_key", "ques_content"),
+                                label_key=data_params.get("label_key", "difficulty"))
+    if eval_items is not None:
+        eval_dataset = BertDataset(tokenizer=tokenizer, items=eval_items,
+                                   stem_key=data_params.get("stem_key", "ques_content"),
+                                   label_key=data_params.get("label_key", "difficulty"))
+    else:
+        eval_dataset = None
+    # model configuration
+    model = BertForPropertyPrediction(pretrained_model, **model_params)
+    model.bert.resize_token_embeddings(len(tokenizer.bert_tokenizer))
+    # training configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
+    if train_params is not None:
+        work_train_params.update(train_params if train_params else {})
+    train_args = TrainingArguments(**work_train_params)
+    data_collator = DataCollatorWithPadding(tokenizer.bert_tokenizer)
+    trainer = Trainer(
+        model=model,
+        args=train_args,
+        train_dataset=train_dataset,
+        eval_dataset=eval_dataset,
+        data_collator=data_collator,
+    )
+    trainer.train()
+    # trainer.model.save_pretrained(output_dir)
+    trainer.save_model(output_dir)
+    trainer.model.save_config(output_dir)
+    tokenizer.save_pretrained(output_dir)
+
+
+def finetune_bert_for_knowledge_prediction(train_items,
+                                           output_dir,
+                                           pretrained_model="bert-base-chinese",
+                                           eval_items=None,
+                                           tokenizer_params=None,
+                                           data_params=None,
+                                           train_params=None,
+                                           model_params=None
+                                           ):
+    """
+    Parameters
+    ----------
+    train_items: list, required
+        The training corpus, each item could be str or dict
+    output_dir: str, required
+        The directory to save trained model files
+    pretrained_model: str, optional
+        The pretrained model name or path for model and tokenizer
+    eval_items: list, required
+        The evaluating items, each item could be str or dict
+    tokenizer_params: dict, optional, default=None
+        The parameters passed to ElmoTokenizer
+    data_params: dict, optional, default=None
+        The parameters passed to ElmoDataset and ElmoTokenizer
+    model_params: dict, optional, default=None
+        The parameters passed to Trainer
+    train_params: dict, optional, default=None
+    """
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    # tokenizer configuration
+    tokenizer = BertTokenizer.from_pretrained(pretrained_model, **tokenizer_params)
+    # dataset configuration
+    train_dataset = BertDataset(tokenizer=tokenizer, items=train_items,
+                                stem_key=data_params.get("stem_key", "ques_content"),
+                                label_key=data_params.get("label_key", "know_list"))
+    if eval_items is not None:
+        eval_dataset = BertDataset(tokenizer=tokenizer, items=eval_items,
+                                   stem_key=data_params.get("stem_key", "ques_content"),
+                                   label_key=data_params.get("label_key", "know_list"))
+    else:
+        eval_dataset = None
+    # model configuration
+    model = BertForKnowledgePrediction(pretrained_model_dir=pretrained_model, **model_params)
+    model.bert.resize_token_embeddings(len(tokenizer.bert_tokenizer))
+    # training configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
+    if train_params is not None:
+        work_train_params.update(train_params if train_params else {})
+    train_args = TrainingArguments(**work_train_params)
+    data_collator = DataCollatorWithPadding(tokenizer.bert_tokenizer)
+    trainer = Trainer(
+        model=model,
+        args=train_args,
+        train_dataset=train_dataset,
+        eval_dataset=eval_dataset,
+        data_collator=data_collator,
+    )
+    trainer.train()
+    # trainer.model.save_pretrained(output_dir)
+    trainer.save_model(output_dir)
+    trainer.model.save_config(output_dir)
+    tokenizer.save_pretrained(output_dir)
diff --git a/EduNLP/Pretrain/disenqnet_vec.py b/EduNLP/Pretrain/disenqnet_vec.py
index 6c0bb978..d2376689 100644
--- a/EduNLP/Pretrain/disenqnet_vec.py
+++ b/EduNLP/Pretrain/disenqnet_vec.py
@@ -1,13 +1,20 @@
 import os
 import numpy as np
 import torch
-from torch.utils.data import Dataset, DataLoader
-from ..ModelZoo.disenqnet.disenqnet import DisenQNet
-from ..Tokenizer import get_tokenizer
-from ..ModelZoo.utils import load_items, pad_sequence
-import json
+from copy import deepcopy
+from transformers import TrainingArguments, Trainer
 import warnings
+from .pretrian_utils import EduDataset
+from typing import Dict, List, Tuple, Union, Any
 from gensim.models import Word2Vec
+from torch.optim.adam import Adam
+from torch.optim.lr_scheduler import StepLR
+import torch.nn as nn
+from dataclasses import dataclass, field
+from ..SIF import EDU_SPYMBOLS
+from ..ModelZoo.disenqnet.disenqnet import DisenQNetForPreTraining
+from ..ModelZoo.utils import load_items, pad_sequence
+from .pretrian_utils import PretrainedEduTokenizer
 
 
 def check_num(s):
@@ -51,21 +58,14 @@ def check_num(s):
             return is_num
 
 
-def list_to_onehot(item_list, item2index):
-    onehot = np.zeros(len(item2index)).astype(np.int64)
-    for c in item_list:
-        onehot[item2index[c]] = 1
-    return onehot
-
-
-def load_list(path):
+def load_list_to_dict(path):
     with open(path, "rt", encoding="utf-8") as file:
         items = file.read().split('\n')
     item2index = {item: index for index, item in enumerate(items)}
     return item2index
 
 
-def save_list(item2index, path):
+def save_dict_to_list(item2index, path):
     item2index = sorted(item2index.items(), key=lambda kv: kv[1])
     items = [item for item, _ in item2index]
     with open(path, "wt", encoding="utf-8") as file:
@@ -73,7 +73,7 @@ def save_list(item2index, path):
     return
 
 
-class DisenQTokenizer(object):
+class DisenQTokenizer(PretrainedEduTokenizer):
     """
     Examples
     --------
@@ -82,14 +82,15 @@ class DisenQTokenizer(object):
     ...     "content": "甲 数 除以 乙 数 的 商 是 1.5 ， 如果 甲 数 增加 20 ， 则 甲 数 是 乙 的 4 倍 ． 原来 甲 数 = ．",
     ...     "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}]
     >>> tokenizer.set_vocab(test_items,
-    ...     trim_min_count=1, key=lambda x: x["content"], silent=True)
+    ...     key=lambda x: x["content"], trim_min_count=1)
+    [['甲', '数', '除以', '乙', '数', '商', '[NUM]', '甲', '数', '增加', '[NUM]', '甲', '数', '乙', '倍', '甲', '数']]
     >>> token_items = [tokenizer(i, key=lambda x: x["content"]) for i in test_items]
     >>> print(token_items[0].keys())
-    dict_keys(['content_idx', 'content_len'])
+    dict_keys(['seq_idx', 'seq_len'])
     """
 
-    def __init__(self, vocab_path=None, max_length=250, tokenize_method="space",
-                 num_token="<num>", unk_token="<unk>", pad_token="<pad>", *args, **argv):
+    def __init__(self, vocab_path=None, max_length=250, tokenize_method="pure_text",
+                 add_specials: list = None, num_token="[NUM]", **kwargs):
         """
         Parameters
         ----------
@@ -98,442 +99,347 @@ def __init__(self, vocab_path=None, max_length=250, tokenize_method="space",
         max_length: int
             default is 250, used to clip the sentence out of length
         tokenize_method: str
-            default: "space"
+            default: "pure_text"
             when text is already seperated by space, use "space"
             when text is raw string format, use Tokenizer defined in get_tokenizer(), such as "pure_text" and "text"
+        num_token: str
         """
-        super(DisenQTokenizer, self).__init__(*args)
-        self.set_text_tokenizer(tokenize_method)
-
-        self.num_token = num_token
-        self.unk_token = unk_token
-        self.pad_token = pad_token
-        self.max_length = max_length
-        if vocab_path is not None:
-            self.load_vocab(vocab_path)
+        if add_specials is None:
+            add_specials = [num_token]
         else:
-            self.secure = False
-
-    def __call__(self, items: (list, str, dict), key=lambda x: x, padding=True,
-                 return_tensors=True, return_text=False, **kwargs):
-        """
-        Parameters
-        ----------
-        items: list or str or dict
-            the question items
-        key: function
-            determine how to get the text of each item
-        padding: bool
-            whether to pad the content_idx
-        return_tensors: bool
-            whether to return data as tensors (would ignore text tokens)
-        return_text: bool
-            whether to return text tokens
-
-        Returns
-        -------
-        ret: dict
-            {"content_idx": None, "content_len": None}
-            or {"content": None, content_idx": None, "content_len": None}.
-            The shape of element is (batch, seq) or (batch,).
-        """
-        token_items = self.tokenize(items, key)
-        if isinstance(items, str) or isinstance(items, dict):
-            token_items = [token_items]
-
-        seqs = [self._indexing(token_item) for token_item in token_items]
-        lengths = [len(seq) for seq in seqs]
-        ret = {
-            "content_idx": pad_sequence(seqs, pad_val=self.word2index[self.pad_token]) if padding else seqs,
-            "content_len": lengths
-        }
-        if return_tensors:
-            return {key: torch.as_tensor(val) for key, val in ret.items()}
-        elif return_text:
-            ret["content"] = token_items
-
-        return ret
-
-    def _indexing(self, token_item):
-        return [self.word2index.get(w, self.word2index[self.unk_token]) for w in token_item]
-
-    def set_text_tokenizer(self, tokenize_method):
-        self.tokenize_method = tokenize_method
-        self.text_tokenizer = get_tokenizer(tokenize_method) if tokenize_method != "space" else self._space_tokenizer
-
-    def tokenize(self, items: (list, str, dict), key=lambda x: x, **kwargs):
-        """
-        Parameters
-        ----------
-        items: list or str or dict
-            the question items
-        key: function
-            determine how to get the text of each item
-
-        Returns
-        -------
-        tokens: list
-            the token of items
-        """
-        if isinstance(items, str) or isinstance(items, dict):
-            return self._tokenize(items, key=key)
-        else:
-            return [self._tokenize(item, key=key) for item in items]
-
-    def _tokenize(self, item: (str, dict), key=lambda x: x):
-        if not self.secure:
-            raise RuntimeError("Must set the vocab first before tokenize item (either set_vocab() or load_vocab() )")
+            add_specials = [num_token] + add_specials
+        super().__init__(vocab_path=vocab_path, max_length=max_length,
+                         tokenize_method=tokenize_method, add_specials=add_specials, **kwargs)
+        self.num_token = num_token
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__", "vocab_path"]}
 
-        token_item = next(self.text_tokenizer([item], key=key))
+    def _tokenize(self, item: Tuple[str, dict], key=lambda x: x):
+        token_item = self.text_tokenizer._tokenize(item, key=key)
         if len(token_item) == 0:
-            token_item = [self.unk_token]
+            token_item = [self.vocab.unk_token]
         if len(token_item) > self.max_length:
             token_item = token_item[:self.max_length]
         token_item = [self.num_token if check_num(w) else w for w in token_item]
         return token_item
 
-    def _space_tokenizer(self, items, key=lambda x: x):
-        stop_words = set("\n\r\t .,;?\"\'。．，、；？“”‘’（）")
-        for item in items:
-            tokens = key(item).strip().split(' ')
-            token_item = [w for w in tokens if w != '' and w not in stop_words]
-            yield token_item
-
-    def load_vocab(self, path):
-        with open(path, "rt", encoding="utf-8") as file:
-            self.words = file.read().strip().split('\n')
-            self.word2index = {word: index for index, word in enumerate(self.words)}
-        self.secure = True
 
-    def set_vocab(self, items: list, key=lambda x: x, trim_min_count=1, silent=True):
-        """
-        Parameters
-        -----------
-        items: list
-            can be the list of str, or list of dict
-        key: function
-            determine how to get the text of each item
-        """
-        self.secure = True
-        word2cnt = dict()
-        token_items = list()
-        for item in items:
-            token_item = self.tokenize(item, key=key)
-            token_items.append(token_item)
-        for item in token_items:
-            for w in item:
-                word2cnt[w] = word2cnt.get(w, 0) + 1
-        ctrl_tokens = [self.num_token, self.unk_token, self.pad_token]
-        words = [w for w, c in word2cnt.items() if c >= trim_min_count and w not in ctrl_tokens]
+def preprocess_dataset(pretrained_dir, disen_tokenizer, items, data_formation, trim_min_count=None, embed_dim=None,
+                       w2v_params=None, silent=False):
+    default_w2v_params = {
+        "workers": 1,
+    }
+    if w2v_params is not None:
+        default_w2v_params.update(w2v_params)
+    w2v_params = default_w2v_params
+
+    concept_list_path = os.path.join(pretrained_dir, "concept.list")
+    vocab_path = os.path.join(pretrained_dir, "vocab.list")
+    wv_path = os.path.join(pretrained_dir, "wv.th")
+
+    file_num = sum(map(lambda x: os.path.exists(x), [wv_path, concept_list_path]))
+    if file_num > 0 and file_num < 3:
+        warnings.warn("Some files are missed in pretrained_dir(which including wv.th, vocab.list, and concept.list)",
+                      UserWarning)
+
+    if not os.path.exists(vocab_path):
+        # load word
+        token_items = disen_tokenizer.set_vocab(items, key=lambda x: x[data_formation["ques_content"]],
+                                                trim_min_count=trim_min_count)
+        disen_tokenizer.save_pretrained(pretrained_dir)
         if not silent:
-            keep_word_cnts = sum(word2cnt[w] for w in words)
-            all_word_cnts = sum(word2cnt.values())
-            print(f"save words(trim_min_count={trim_min_count}): {len(words)}/{len(word2cnt)} = {len(words)/len(word2cnt):.4f}\
-                  with frequency {keep_word_cnts}/{all_word_cnts}={keep_word_cnts/all_word_cnts:.4f}")
-
-        self.words = ctrl_tokens + sorted(words)
-        self.word2index = {word: index for index, word in enumerate(self.words)}
-
-    def save_vocab(self, save_vocab_path):
-        save_list(self.word2index, save_vocab_path)  # only save words
-
-    @classmethod
-    def from_pretrained(cls, tokenizer_config_dir):
-        """
-        Parameters:
-        -----------
-        tokenizer_config_dir: str
-            must contain tokenizer_config.json and vocab.list
-        """
-        tokenizer_config_path = os.path.join(tokenizer_config_dir, "tokenizer_config.json")
-        pretrained_vocab_path = os.path.join(tokenizer_config_dir, "vocab.list")
-        with open(tokenizer_config_path, "r", encoding="utf-8") as rf:
-            tokenizer_config = json.load(rf)
-            return cls(
-                vocab_path=pretrained_vocab_path, max_length=tokenizer_config["max_length"],
-                tokenize_method=tokenizer_config["tokenize_method"], num_token=tokenizer_config["num_token"],
-                unk_token=tokenizer_config["unk_token"], pad_token=tokenizer_config["pad_token"])
-
-    def save_pretrained(self, tokenizer_config_dir):
-        """
-        Parameters:
-        -----------
-        tokenizer_config_dir: str
-            save tokenizer params in tokenizer_config.json and save words in vocab.list
-        """
-        tokenizer_config_path = os.path.join(tokenizer_config_dir, "tokenizer_config.json")
-        save_vocab_path = os.path.join(tokenizer_config_dir, "vocab.list")
-        tokenizer_params = {
-            "tokenize_method": self.tokenize_method,
-            "num_token": self.num_token,
-            "unk_token": self.unk_token,
-            "pad_token": self.pad_token,
-            "max_length": self.max_length,
-        }
-        self.save_vocab(save_vocab_path)
-        with open(tokenizer_config_path, "w", encoding="utf-8") as wf:
-            json.dump(tokenizer_params, wf, ensure_ascii=False, indent=2)
-
-    @property
-    def vocab_size(self):
-        return len(self.word2index)
+            print(f"save vocab to {vocab_path}")
+    else:
+        if not silent:
+            print(f"load vocab from {vocab_path}")
+
+    # construct concept list
+    if not os.path.exists(concept_list_path):
+        concepts = set()
+        for data in items:
+            print(data)
+            concept = data[data_formation["knowledge"]]
+            for c in concept:
+                if c not in concepts:
+                    concepts.add(c)
+        concepts = sorted(concepts)
+        concept_to_idx = {concept: index for index, concept in enumerate(concepts)}
+        save_dict_to_list(concept_to_idx, concept_list_path)
+        if not silent:
+            print(f"save concept to {concept_list_path}")
+    else:
+        print(f"load concept from {concept_list_path}")
+        concept_to_idx = load_list_to_dict(concept_list_path)
+
+    # word2vec
+    if not os.path.exists(wv_path):
+        words = disen_tokenizer.vocab.tokens
+        unk_token = disen_tokenizer.vocab.unk_token
+        corpus = list()
+        word_set = set(words)
+        for text in token_items:
+            text = [w if w in word_set else unk_token for w in text]
+            corpus.append(text)
+        wv = Word2Vec(corpus, vector_size=embed_dim, min_count=trim_min_count, **w2v_params).wv
+        # 按照 vocab 中的词序 来保存
+        wv_list = [wv[w] if w in wv.key_to_index else np.random.rand(embed_dim) for w in words]
+        word2vec = torch.tensor(wv_list)
+        torch.save(word2vec, wv_path)
+        if not silent:
+            print(f"save word2vec to {wv_path}")
+    else:
+        print(f"load word2vec from {wv_path}")
+        word2vec = torch.load(wv_path)
+    return disen_tokenizer, concept_to_idx, word2vec
 
 
-class QuestionDataset(Dataset):
-    """
-    Question dataset including text, length, concept Tensors
-    """
-    def __init__(self, items, disen_tokenizer, predata_dir, dataset_type,
-                 silent=False, embed_dim=128, trim_min_count=50, data_formation=None, w2v_workers=1):
+class DisenQDataset(EduDataset):
+    def __init__(self, items: List[Dict], tokenizer: DisenQTokenizer, data_formation: Dict,
+                 mode="train", concept_to_idx=None, **kwargs):
         """
         Parameters
         ----------
-        items: list
-            the raw question in json format
-        predata_dir: str
-            the dir to save or load the predata (include wv.th, vocab.list, concept.list )
+        texts: list
+        tokenizer: DisenQTokenizer
+        data_formation: dict
+        max_length: int, optional, default=128
         """
-        super(QuestionDataset, self).__init__()
-        self.silent = silent
-        default_data_formation = {
-            "content": "content",
-            "knowledge": "knowledge"
-        }
-        if data_formation is not None:
-            default_data_formation.update(data_formation)
-        self.data_formation = default_data_formation
-        self.w2v_workers = w2v_workers
-
-        self.dataset_type = dataset_type
-        self.wv_path = os.path.join(predata_dir, "wv.th")
-        self.vocab_path = os.path.join(predata_dir, "vocab.list")
-        self.concept_list_path = os.path.join(predata_dir, "concept.list")
-        self.disen_tokenizer = disen_tokenizer
-        file_num = sum(map(lambda x: os.path.exists(x), [self.wv_path, self.vocab_path, self.concept_list_path]))
-        if file_num > 0 and file_num < 3:
-            warnings.warn("Some files are missed in predata_dir(which including wv.th, vocab.list, and concept.list)",
-                          UserWarning)
-        init = file_num != 3
-        if not init:
-            # load word, concept list
-            self.word2index = load_list(self.vocab_path)
-            self.concept2index = load_list(self.concept_list_path)
-            self.word2vec = torch.load(self.wv_path)
-
-            self.disen_tokenizer.load_vocab(self.vocab_path)
-            if not silent:
-                print(f"load vocab from {self.vocab_path}")
-                print(f"load concept from {self.concept_list_path}")
-                print(f"load word2vec from {self.wv_path}")
-        else:
-            self.disen_tokenizer.set_vocab(items, key=lambda x: x[self.data_formation["content"]],
-                                           trim_min_count=trim_min_count)
-            self.disen_tokenizer.save_pretrained(predata_dir)
-            if not silent:
-                print(f"save vocab to {self.vocab_path}")
-            self.word2index = self.disen_tokenizer.word2index
-
-        self.num_token = self.disen_tokenizer.num_token  # "<num>"
-        self.unk_token = self.disen_tokenizer.unk_token  # "<unk>"
-        self.pad_token = self.disen_tokenizer.pad_token  # "<pad>"
-        self.unk_idx = self.word2index[self.unk_token]
-
-        # load dataset, init construct word and concept list
-        if dataset_type == "train":
-            self.dataset = self.process_dataset(items, trim_min_count, embed_dim, init)
-        elif dataset_type == "test":
-            self.dataset = self.process_dataset(items, trim_min_count, embed_dim, False)
-
-        if not silent:
-            print("processing raw data for QuestionDataset...")
-
-        self.vocab_size = len(self.word2index)
-        self.concept_size = len(self.concept2index)
-        if dataset_type == "train" and not silent:
-            print(f"vocab size: {self.vocab_size}")
-            print(f"concept size: {self.concept_size}")
-        return
-
-    def process_dataset(self, items, trim_min_count, embed_dim, init=False):
-        # make items in standard format
-        for i, item in enumerate(items):
-            token_data = self.disen_tokenizer(item, key=lambda x: x[self.data_formation["content"]],
-                                              return_tensors=False, return_text=True, padding=False)
-            items[i]["content_idx"] = token_data["content_idx"][0]
-            items[i]["content_len"] = token_data["content_len"][0]
-            items[i]["content"] = token_data["content"][0]
-
-        if init:
-            # construct concept list
-            if not os.path.exists(self.concept_list_path):
-                concepts = set()
-                for data in items:
-                    concept = data[self.data_formation["knowledge"]]
-                    for c in concept:
-                        if c not in concepts:
-                            concepts.add(c)
-                concepts = sorted(concepts)
-                self.concept2index = {concept: index for index, concept in enumerate(concepts)}
-                save_list(self.concept2index, self.concept_list_path)
-                if not self.silent:
-                    print(f"save concept to {self.concept_list_path}")
-            else:
-                self.concept2index = load_list(self.concept_list_path)
-            # word2vec
-            if not os.path.exists(self.wv_path):
-                words = self.disen_tokenizer.words
-                corpus = list()
-                word_set = set(words)
-                for data in items:
-                    text = [w if w in word_set else self.unk_token for w in data["content"]]
-                    corpus.append(text)
-                wv = Word2Vec(corpus, vector_size=embed_dim, min_count=trim_min_count, workers=self.w2v_workers).wv
-                # 按照 vocab 中的词序 来保存
-                wv_list = [wv[w] if w in wv.key_to_index else np.random.rand(embed_dim) for w in words]
-                self.word2vec = torch.tensor(wv_list)
-                torch.save(self.word2vec, self.wv_path)
-                if not self.silent:
-                    print(f"save word2vec to {self.wv_path}")
-            else:
-                self.word2vec = torch.load(self.wv_path)
-        return items
+        # super(DisenQDataset, self).__init__(tokenizer=tokenizer, **kwargs)
+        self.tokenizer = tokenizer
+        self.concept_to_idx = concept_to_idx
+        self.mode = mode
+        self.items = items
+        self.max_length = tokenizer.max_length
+        self.data_formation = data_formation
 
     def __len__(self):
-        return len(self.dataset)
+        return len(self.items)
+
+    def _list_to_onehot(self, item_list, item2index):
+        onehot = np.zeros(len(item2index)).astype(np.int64)
+        for c in item_list:
+            onehot[item2index[c]] = 1
+        return onehot
 
     def __getitem__(self, index):
-        # map word to index
-        data = self.dataset[index]
-        text = data["content_idx"]
-        length = data["content_len"]
-        concept = list_to_onehot(data[self.data_formation["knowledge"]], self.concept2index)
-        return text, length, concept
-
-    def collate_data(self, batch_data):
-        pad_idx = self.word2index[self.pad_token]
-        text, length, concept = list(zip(*batch_data))
-        max_length = max(length)
-        text = [t + [pad_idx] * (max_length - len(t)) for t in text]
-        text = torch.tensor(text)
-        length = torch.tensor(length)
-        concept = torch.tensor(concept)
-        return text, length, concept
-
-
-def train_disenqnet(train_items, disen_tokenizer, output_dir, predata_dir,
-                    train_params=None, test_items=None, silent=False, data_formation=None):
+        item = self.items[index]
+        ret = self.tokenizer(item, padding=False, key=lambda x: x[self.data_formation["ques_content"]],
+                             return_tensors=False, return_text=False)
+        if self.mode in ["train", "val"]:
+            ret['concept'] = self._list_to_onehot(item[self.data_formation["knowledge"]], self.concept_to_idx)
+        return ret
+
+    def collate_fn(self, batch_data):
+        pad_idx = self.tokenizer.vocab.pad_idx
+        first = batch_data[0]
+        batch = {
+            k: [item[k] for item in batch_data] for k in first.keys()
+        }
+        batch["seq_idx"] = pad_sequence(batch["seq_idx"], pad_val=pad_idx)
+        batch = {key: torch.as_tensor(val) for key, val in batch.items()}
+        return batch
+
+
+class DisenQTrainer(Trainer):
+    def create_optimizer_and_scheduler(self, num_training_steps: int):
+        self.optimizer = Adam(self.model.model_params, lr=self.args.learning_rate)
+        self.lr_scheduler = StepLR(self.optimizer, step_size=self.args.step_size, gamma=self.args.gamma)
+        self.adv_optimizer = Adam(self.model.adv_params, lr=self.args.learning_rate)
+        self.adv_scheduler = StepLR(self.adv_optimizer, step_size=self.args.step_size, gamma=self.args.gamma)
+
+    def training_step(self, model: nn.Module, inputs: Dict[str, Union[torch.Tensor, Any]]) -> torch.Tensor:
+        model.train()
+        inputs = self._prepare_inputs(inputs)
+        warming_up = self.state.epoch <= model.params["warmup"]
+        print(self.state)
+        if not warming_up:
+            # train disc
+            outputs = model(**inputs)
+            # stop gradient propagation to encoder
+            k_hidden = outputs.k_hidden.detach()
+            i_hidden = outputs.i_hidden.detach()
+            # max dis_loss
+            dis_loss = - model.disen_estimator(k_hidden, i_hidden)
+            dis_loss = model.params["n_adversarial"] * model.params["w_dis"] * dis_loss
+            if self.args.gradient_accumulation_steps > 1 and not self.deepspeed:
+                dis_loss = dis_loss / self.args.gradient_accumulation_steps
+            dis_loss.backward()
+            step = self.state.global_step % (self.state.max_steps / self.state.num_train_epochs)
+            if (step + 1) % self.args.gradient_accumulation_steps or \
+                    (step + 1) == self.state.max_steps / self.state.num_train_epochs:
+                self.adv_optimizer.step()
+                self.adv_optimizer.zero_grad()
+            # Lipschitz constrain for Disc of WGAN
+            model.disen_estimator.spectral_norm()
+        model.warming_up = warming_up
+
+        loss = self.compute_loss(model, inputs)
+
+        if self.args.n_gpu > 1:
+            loss = loss.mean()  # mean() to average on multi-gpu parallel training
+
+        if self.args.gradient_accumulation_steps > 1 and not self.deepspeed:
+            # deepspeed handles loss scaling by gradient_accumulation_steps in its `backward`
+            loss = loss / self.args.gradient_accumulation_steps
+
+        loss.backward()
+
+        # TODO: Not sure. if warming_up, the scheduler should not step?
+        if not warming_up:
+            self.adv_scheduler.step()
+
+        return loss.detach()
+
+
+@dataclass
+class DisenQTrainingArguments(TrainingArguments):
+    step_size: int = field(default=False, metadata={"help": "step_size"})
+    trim_min: int = field(default=False, metadata={"help": "trim"})
+    hidden_size: int = field(default=False, metadata={"help": "hidden_size"})
+    gamma: float = field(default=False, metadata={"help": "gamma"})
+
+
+DEFAULT_TRAIN_PARAMS = {
+    # default
+    "output_dir": None,
+    "overwrite_output_dir": True,
+    "num_train_epochs": 3,
+    "per_device_train_batch_size": 8,
+    "per_device_eval_batch_size": 32,
+    # evaluation_strategy: "steps",
+    # eval_steps:200,
+    "save_steps": 1000,
+    "save_total_limit": 2,
+    # "load_best_model_at_end": False,
+    # metric_for_best_model: "loss",
+    # greater_is_better: False,
+    "logging_dir": None,
+    "logging_steps": 5,
+    "gradient_accumulation_steps": 1,
+    "learning_rate": 5e-4,
+    # disable_tqdm: True,
+    # no_cuda: True,
+    'step_size': 20,
+    'gamma': 0.5,
+    "trim_min": 1,
+    "hidden_size": 300
+}
+
+
+def train_disenqnet(train_items: List[dict], output_dir: str, pretrained_dir: str = None,
+                    eval_items=None, tokenizer_params=None, data_params=None, model_params=None,
+                    train_params=None, w2v_params=None):
     """
     Parameters
     ----------
-    train_items: list
-        the raw train question list
-    disen_tokenizer: DisenQTokenizer
-        the initial DisenQTokenizer use for training.
-    output_dir: str
-        the path to save the model
-    predata_dir: str
-        the dirname to load or save predata (including wv.th, vocab.list and concept.list)
-    train_params: dict, defaults to None
-        the training parameters for data, model and trianer.
-        - "trim_min": int
-            data param, the trim_min_count for vocab and word2vec, by default 2
-        - "w2v_workers": int
-            data param, the number of workers for word2vec, by default 1
-        - "hidden": int
-            model param, by default 128
-        - "dropout": float
-            model param, dropout rate, by default 0.2
-        - "pos_weight": int
-            model param, positive sample weight in unbalanced multi-label concept classifier, by default 1
-        - "cp": float
-            model param, weight of concept loss, by default 1.5
-        - "mi": float
-            model param, weight of mutual information loss, by default 1.0
-        - "dis": float
-            model param, weight of disentangling loss, by default 2.0
-        - "epoch": int
-            train param, number of epoch, by default 1
-        - "batch": int
-            train param, batch size, by default 64
-        - "lr": float
-            train param, learning rate, by default 1e-3
-        - "step": int
-            train param, step_size for StepLR, by default 20
-        - "gamma": float
-            train param, gamma for StepLR, by default 0.5
-        - "warm_up": int
-            train param, number of epoch for warming up, by default 1
-        - "adv": int
-            train param, ratio of disc/enc training for adversarial process, by default 10
-        - "device": str
-            train param, 'cpu' or 'cuda', by default "cpu"
-    test_items: list, defaults to None
-        the raw test question list, default is None
-    silent: bool, defaults to False
-        whether to print processing inforamtion
-    data_formation: dict, defaults to None
-        Mapping "content" and "knowledge" for the item formation.
-        For example, {"content": "ques_content", "knowledge": "know_name"}
-
-    Examples
-    ----------
-    >>> train_data = load_items("static/test_data/disenq_train.json")[:100]
-    >>> test_data = load_items("static/test_data/disenq_test.json")[:100]
-    >>> tokenizer = DisenQTokenizer(max_length=250, tokenize_method="space")
-    >>> train_disenqnet(train_data, tokenizer,
-    ... "examples/test_model/disenq","examples/test_model/disenq", silent=True)  # doctest: +SKIP
+    train_items : List[dict]
+        _description_
+    output_dir : str
+        _description_
+    pretrained_dir : str, optional
+        _description_, by default None
+    tokenizer_params : _type_, optional
+        _description_, by default None
+    data_params : _type_, optional
+        _description_, by default None
+    model_params : _type_, optional
+        _description_, by default None
+    train_params : _type_, optional
+        _description_, by default None
     """
-    # dataset
-    default_train_params = {
-        # data params
-        "trim_min": 2,
-        "w2v_workers": 1,
-        # model params
-        "hidden": 128,
-        "dropout": 0.2,
-        "pos_weight": 1,
-        "cp": 1.5,
-        "mi": 1.0,
-        "dis": 2.0,
-        # training params
-        "epoch": 1,
-        "batch": 64,
-        "lr": 1e-3,
-        "step": 20,
-        "gamma": 0.5,
-        "warm_up": 1,
-        "adv": 10,
-        "device": "cpu"
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    w2v_params = w2v_params if w2v_params is not None else {}
+    default_data_formation = {
+        "ques_content": "ques_content",
+        "knowledge": "knowledge"
     }
+    data_formation = data_params.get("data_formation", None)
+    if data_formation is not None:
+        default_data_formation.update(data_formation)
+    data_formation = default_data_formation
+
+    # tokenizer configuration
+    if pretrained_dir is not None and os.path.exists(pretrained_dir):
+        tokenizer = DisenQTokenizer.from_pretrained(pretrained_dir, **tokenizer_params)
+    else:
+        work_tokenizer_params = {
+            "add_specials": None,
+            "tokenize_method": "pure_text",
+        }
+        work_tokenizer_params.update(tokenizer_params if tokenizer_params else {})
+        tokenizer = DisenQTokenizer(**work_tokenizer_params)
+        corpus_items = train_items
+        tokenizer.set_vocab(corpus_items,
+                            key=lambda x: x[data_formation['ques_content']])
+
+    # training Configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
     if train_params is not None:
-        default_train_params.update(train_params)
-    train_params = default_train_params
-
-    train_dataset = QuestionDataset(train_items, disen_tokenizer, predata_dir, "train",
-                                    silent=silent, embed_dim=train_params["hidden"],
-                                    trim_min_count=train_params["trim_min"],
-                                    data_formation=data_formation, w2v_workers=train_params["w2v_workers"])
-    train_dataloader = DataLoader(train_dataset, batch_size=train_params["batch"],
-                                  shuffle=True, collate_fn=train_dataset.collate_data)
-    if test_items is not None:
-        test_dataset = QuestionDataset(test_items, disen_tokenizer, predata_dir, "test",
-                                       silent=silent, embed_dim=train_params["hidden"],
-                                       trim_min_count=train_params["trim_min"],
-                                       data_formation=data_formation, w2v_workers=train_params["w2v_workers"])
-        test_dataloader = DataLoader(test_dataset, batch_size=train_params["batch"],
-                                     shuffle=False, collate_fn=test_dataset.collate_data)
+        work_train_params.update(train_params if train_params else {})
+    if model_params:
+        if 'hidden_size' in model_params:
+            work_train_params['hidden_size'] = model_params['hidden_size']
+
+    # dataset configuration
+    items = train_items + ([] if eval_items is None else eval_items)
+    if pretrained_dir:
+        tokenizer, concept_to_idx, word2vec = preprocess_dataset(pretrained_dir, tokenizer, items,
+                                                                 data_formation,
+                                                                 trim_min_count=work_train_params["trim_min"],
+                                                                 embed_dim=work_train_params["hidden_size"],
+                                                                 w2v_params=w2v_params, silent=False)
     else:
-        test_dataloader = None
-    vocab_size = train_dataset.vocab_size
-    concept_size = train_dataset.concept_size
-    wv = train_dataset.word2vec
-
-    # model
-    disen_q_net = DisenQNet(vocab_size, concept_size, train_params["hidden"], train_params["dropout"],
-                            train_params["pos_weight"], train_params["cp"], train_params["mi"], train_params["dis"],
-                            wv=wv, device=train_params["device"])
-
-    disen_q_net.train(train_dataloader, test_dataloader, train_params["epoch"],
-                      train_params["lr"], train_params["step"], train_params["gamma"],
-                      train_params["warm_up"], train_params["adv"], silent=silent)
-    disen_q_net.save_pretrained(output_dir)
+        tokenizer, concept_to_idx, word2vec = preprocess_dataset(output_dir, tokenizer, items,
+                                                                 data_formation,
+                                                                 trim_min_count=work_train_params["trim_min"],
+                                                                 embed_dim=work_train_params["hidden_size"],
+                                                                 w2v_params=w2v_params, silent=False)
+    train_dataset = DisenQDataset(train_items, tokenizer, data_formation,
+                                  mode="train", concept_to_idx=concept_to_idx)
+    if eval_items:
+        eval_dataset = DisenQDataset(eval_items, tokenizer, data_formation,
+                                     mode="test", concept_to_idx=concept_to_idx)
+    else:
+        eval_dataset = None
+
+    # model configuration
+    if pretrained_dir:
+        model = DisenQNetForPreTraining.from_pretrained(pretrained_dir, **model_params)
+    else:
+        work_model_params = {
+            "vocab_size": len(tokenizer),
+            "hidden_size": 300,
+            'concept_size': len(concept_to_idx),
+            'dropout_rate': 0.2,
+            'pos_weight': 1,
+            'w_cp': 1.5,
+            'w_mi': 1.0,
+            'w_dis': 2.0,
+            'warmup': 1,
+            'n_adversarial': 10,
+            'gamma': 0.5,
+            'step_size': 20,
+            'wv': word2vec
+        }
+        work_model_params.update(model_params if model_params else {})
+        model = DisenQNetForPreTraining(**work_model_params)
+
+    # Train
+    work_args = DisenQTrainingArguments(**work_train_params)
+    trainer = DisenQTrainer(
+        model=model,
+        args=work_args,
+        train_dataset=train_dataset,
+        eval_dataset=eval_dataset,
+        data_collator=train_dataset.collate_fn,
+    )
+    trainer.train()
+    # trainer.model.save_pretrained(output_dir)
+    assert isinstance(trainer.model, DisenQNetForPreTraining)
+    trainer.save_model(output_dir)
+    trainer.model.save_config(output_dir)
+    tokenizer.save_pretrained(output_dir)
+    return output_dir
diff --git a/EduNLP/Pretrain/elmo_vec.py b/EduNLP/Pretrain/elmo_vec.py
index 05441aa5..166e4c36 100644
--- a/EduNLP/Pretrain/elmo_vec.py
+++ b/EduNLP/Pretrain/elmo_vec.py
@@ -1,246 +1,323 @@
 import torch
-from torch import nn
-import torch.nn.functional as F
-import torch.utils.data as tud
-import torch.optim as optim
-import numpy as np
-import json
 import os
-import time
-from EduNLP.SIF import Symbol, FORMULA_SYMBOL, FIGURE_SYMBOL, QUES_MARK_SYMBOL, TAG_SYMBOL, SEP_SYMBOL
-from EduNLP.Tokenizer import PureTextTokenizer
-from EduNLP.ModelZoo.rnn import ElmoLM
-from EduNLP.ModelZoo import set_device
+from copy import deepcopy
+from transformers import TrainingArguments, Trainer
+from typing import Optional, Union, List
+from ..ModelZoo.rnn import ElmoLM, ElmoLMForPreTraining, ElmoLMForPropertyPrediction, ElmoLMForKnowledgePrediction
+from ..ModelZoo.utils import pad_sequence
+from .pretrian_utils import PretrainedEduTokenizer, EduDataset
 
-UNK_SYMBOL = '[UNK]'
-PAD_SYMBOL = '[PAD]'
+__all__ = ["ElmoTokenizer", "ElmoDataset", "train_elmo", "train_elmo_for_property_prediction",
+           "train_elmo_for_knowledge_prediction"]
 
+DEFAULT_TRAIN_PARAMS = {
+    # default
+    "output_dir": None,
+    "overwrite_output_dir": True,
+    "num_train_epochs": 3,
+    "per_device_train_batch_size": 8,
+    "per_device_eval_batch_size": 32,
+    # evaluation_strategy: "steps",
+    # eval_steps:200,
+    "save_steps": 1000,
+    "save_total_limit": 2,
+    # "load_best_model_at_end": False,
+    # metric_for_best_model: "loss",
+    # greater_is_better: False,
+    "logging_dir": None,
+    "logging_steps": 5,
+    "gradient_accumulation_steps": 1,
+    "learning_rate": 5e-4,
+    # disable_tqdm: True,
+    # no_cuda: True,
+}
 
-class ElmoTokenizer(object):
+
+class ElmoTokenizer(PretrainedEduTokenizer):
     """
     Examples
     --------
     >>> t=ElmoTokenizer()
     >>> items = ["有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\\
     ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
+    >>> len(t)
+    14
     >>> t.tokenize(items[0])
     ['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']
+    >>> t(items[0])
+    {'seq_idx': tensor([1, 1, 6, 1, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 1, 1, 7]), 'seq_len': tensor(17)}
+    >>> t.set_vocab(items[0])
+    ['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']
     >>> len(t)
-    18
+    45
+    >>> t(items[0])
+    {'seq_idx': tensor([ 1,  1,  6, 26, 27, 28,  1,  1,  9, 35, 36, 26, 37, 38, 28,  1,  7]), 'seq_len': tensor(17)}
     """
 
-    def __init__(self, path: str = None):
-        """
-        Parameters
-        ----------
-        path: str, optional
-            the path of saved ElmoTokenizer, e.g. "../elmo_pub_math/vocab.json"
-        """
-        self.pure_tokenizer = PureTextTokenizer()
-        self.t2id = {PAD_SYMBOL: 0, UNK_SYMBOL: 1, FORMULA_SYMBOL: 2, FIGURE_SYMBOL: 3,
-                     QUES_MARK_SYMBOL: 4, TAG_SYMBOL: 5, SEP_SYMBOL: 6}
-        if path is None:
-            pass
-        else:
-            self.load_vocab(path)
+    def __init__(self, vocab_path=None, max_length=250, tokenize_method="pure_text", add_specials=True, **kwargs):
+        super().__init__(vocab_path=vocab_path, max_length=max_length, tokenize_method=tokenize_method,
+                         add_specials=add_specials, **kwargs)
 
-    def __call__(self, item: (str, list), freeze_vocab=False, pad_to_max_length=False, *args, **kwargs):
-        tokens, lengths = self.tokenize(item=item, freeze_vocab=freeze_vocab, return_length=True)
-        if isinstance(item, str):
-            return self.to_index(item=tokens, pad_to_max_length=pad_to_max_length), lengths
-        else:
-            ret = []
-            for ts in tokens:
-                ret.append(self.to_index(item=ts, pad_to_max_length=pad_to_max_length))
-            return ret, lengths
-
-    def __len__(self):
-        return len(self.t2id)
-
-    def tokenize(self, item: (str, list), freeze_vocab=False, return_length=False):
-        items = [item] if isinstance(item, str) else item
-        lengths = []
-        tokens = []
-        for i in self.pure_tokenizer(items):
-            tokens.append(i)
-            lengths.append(len(i))
-            if not freeze_vocab:
-                for t in i:
-                    self.append(t)
-        tokens = tokens[0] if isinstance(item, str) else tokens
-        lengths = lengths[0] if isinstance(item, str) else lengths
-        if return_length:
-            return tokens, lengths
-        else:
-            return tokens
-
-    def to_index(self, item: list, max_length=128, pad_to_max_length=False):
-        ret = [self.t2id[UNK_SYMBOL] if token not in self.t2id else self.t2id[token] for token in item]
-        if pad_to_max_length:
-            if len(ret) < max_length:
-                ret = ret + (max_length - len(ret)) * [self.t2id[PAD_SYMBOL]]
-            else:
-                ret = ret[0:max_length - 1]
-        return ret
-
-    def append(self, item):
-        if item in self.t2id:
-            pass
-        else:
-            self.t2id[item] = len(self.t2id)
-
-    def save_vocab(self, path):
-        with open(path, 'w') as f:
-            json.dump(self.t2id, f)
-        return path
-
-    def load_vocab(self, path):
-        with open(path, 'r') as f:
-            self.t2id = json.load(f)
-        return path
-
-
-class ElmoDataset(tud.Dataset):
-    def __init__(self, texts: list, tokenizer: ElmoTokenizer, max_length=128):
-        """
-        Parameters
-        ----------
-        texts: list
-        tokenizer: ElmoTokenizer
-        max_length: int, optional, default=128
-        """
-        super(ElmoDataset, self).__init__()
-        self.tokenizer = tokenizer
-        self.texts = [text if len(text) < max_length else text[0:max_length - 1] for text in texts]
-        self.max_length = max_length
-
-    def __len__(self):
-        return len(self.texts)
-
-    def __getitem__(self, index):
-        text = self.texts[index]
-        sample = {
-            'length': len(text),
-            'idx': self.tokenizer.to_index(text, pad_to_max_length=True, max_length=self.max_length)
+
+class ElmoDataset(EduDataset):
+    def __init__(self, tokenizer: ElmoTokenizer, **kwargs):
+        super(ElmoDataset, self).__init__(tokenizer=tokenizer, **kwargs)
+
+    def collate_fn(self, batch_data):
+        pad_idx = self.tokenizer.vocab.pad_idx
+        first = batch_data[0]
+        batch = {
+            k: [item[k] for item in batch_data] for k in first.keys()
         }
-        return sample
-
-
-def elmo_collate_fn(batch_data):
-    pred_mask = []
-    idx_mask = []
-    max_len = max([data['length'] for data in batch_data])
-    for data in batch_data:
-        pred_mask.append([True] * data['length'] + [False] * (max_len - data['length']))
-    for data in batch_data:
-        idx_mask.append([True] * data['length'] + [False] * (len(data['idx']) - data['length']))
-    ret_batch = {
-        'pred_mask': torch.tensor(pred_mask),
-        'idx_mask': torch.tensor(idx_mask),
-        'length': torch.tensor([data['length'] for data in batch_data]),
-        'idx': torch.tensor([data['idx'] for data in batch_data])
-    }
-    return ret_batch
-
-
-def train_elmo(texts: list, output_dir: str, pretrained_dir: str = None, emb_dim=512, hid_dim=512, batch_size=2,
-               epochs=3, lr: float = 5e-4, device=None):
+        batch["seq_idx"] = pad_sequence(batch["seq_idx"], pad_val=pad_idx)
+        batch = {key: torch.as_tensor(val) for key, val in batch.items()}
+        return batch
+
+
+def train_elmo(items: Union[List[dict], List[str]], output_dir: str, pretrained_dir: str = None,
+               tokenizer_params=None, data_params=None, model_params=None, train_params=None):
     """
     Parameters
     ----------
-    texts: list, required
-        The training corpus of shape (text_num, token_num), a text must be tokenized into tokens
+    items: list, required
+        The training corpus, each item could be str or dict
     output_dir: str, required
         The directory to save trained model files
     pretrained_dir: str, optional
-        The pretrained model files' directory
-    emb_dim: int, optional, default=512
-        The embedding dim
-    hid_dim: int, optional, default=1024
-        The hidden dim
-    batch_size: int, optional, default=2
-        The training batch size
-    epochs: int, optional, default=3
-        The training epochs
-    lr: float, optional, default=5e-4
-        The learning rate
-    device: str, optional
-        Default is 'cuda' if available, otherwise 'cpu'
-
-    Returns
-    -------
-    output_dir: str
-        The directory that trained model files are saved
+        The pretrained directory for model and tokenizer
+    tokenizer_params: dict, optional, default=None
+        The parameters passed to ElmoTokenizer
+    data_params: dict, optional, default=None
+        - stem_key
+        - label_key
+        The parameters passed to ElmoDataset and ElmoTokenizer
+    model_params: dict, optional, default=None
+        The parameters passed to Trainer
+    train_params: dict, optional, default=None
     """
-    tokenizer = ElmoTokenizer()
-    if pretrained_dir:
-        tokenizer.load_vocab(os.path.join(pretrained_dir, 'vocab.json'))
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    # tokenizer configuration
+    if pretrained_dir is not None and os.path.exists(pretrained_dir):
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_dir, **tokenizer_params)
     else:
-        for text in texts:
-            for token in text:
-                tokenizer.append(token)
-    train_dataset = ElmoDataset(texts, tokenizer)
+        work_tokenizer_params = {
+            "add_specials": True,
+            "tokenize_method": "pure_text",
+        }
+        work_tokenizer_params.update(tokenizer_params if tokenizer_params else {})
+        tokenizer = ElmoTokenizer(**work_tokenizer_params)
+        corpus_items = items
+        if isinstance(items[0], str):
+            tokenizer.set_vocab(corpus_items)
+        else:
+            tokenizer.set_vocab(corpus_items,
+                                key=lambda x: x[data_params.get("stem_key", "ques_content")])
+
+    # dataset configuration
+    dataset = ElmoDataset(tokenizer=tokenizer, items=items,
+                          stem_key=data_params.get("stem_key", "ques_content"))
+
+    # model configuration
     if pretrained_dir:
-        with open(os.path.join(pretrained_dir, 'config.json'), 'r') as f:
-            config = json.load(f)
-        model = ElmoLM(vocab_size=len(tokenizer), embedding_dim=config['emb_dim'],
-                       hidden_size=config['hid_dim'])
-        model.load_state_dict(torch.load(os.path.join(pretrained_dir, 'weight.pt')))
+        model = ElmoLMForPreTraining.from_pretrained(pretrained_dir, **model_params)
+    else:
+        work_model_params = {
+            "vocab_size": len(tokenizer),
+            "embedding_dim": 300,
+            "hidden_size": 300
+        }
+        work_model_params.update(model_params if model_params else {})
+        model = ElmoLMForPreTraining(**work_model_params)
+    model.elmo.LM_layer.rnn.flatten_parameters()
+
+    # training configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
+    if train_params is not None:
+        work_train_params.update(train_params if train_params else {})
+    work_args = TrainingArguments(**work_train_params)
+    trainer = Trainer(
+        model=model,
+        args=work_args,
+        train_dataset=dataset,
+        data_collator=dataset.collate_fn,
+    )
+    trainer.train()
+    # trainer.model.save_pretrained(output_dir)
+    assert isinstance(trainer.model, ElmoLMForPreTraining)
+    trainer.save_model(output_dir)
+    trainer.model.save_config(output_dir)
+    tokenizer.save_pretrained(output_dir)
+    return output_dir
+
+
+def train_elmo_for_property_prediction(
+        train_items: list, output_dir: str, pretrained_dir=None, eval_items=None,
+        tokenizer_params=None, data_params=None, train_params=None, model_params=None
+):
+    """
+    Parameters
+    ----------
+    train_items: list, required
+        The training items, each item could be str or dict
+    output_dir: str, required
+        The directory to save trained model files
+    pretrained_dir: str, optional
+        The pretrained directory for model and tokenizer
+    eval_items: list, required
+        The evaluating items, each item could be str or dict
+    tokenizer_params: dict, optional, default=None
+        The parameters passed to ElmoTokenizer
+    data_params: dict, optional, default=None
+        The parameters passed to ElmoDataset and ElmoTokenizer
+    model_params: dict, optional, default=None
+        The parameters passed to Trainer
+    train_params: dict, optional, default=None
+    """
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    # tokenizer configuration
+    if pretrained_dir is not None:
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_dir, **tokenizer_params)
+    else:
+        work_tokenizer_params = {
+            "add_special_tokens": True,
+            "tokenize_method": "pure_text",
+        }
+        work_tokenizer_params.update(tokenizer_params if tokenizer_params else {})
+        tokenizer = ElmoTokenizer(**work_tokenizer_params)
+        corpus_items = train_items + eval_items if eval_items else []
+        tokenizer.set_vocab(corpus_items,
+                            key=lambda x: x[data_params.get("stem_key", "ques_content")])
+    # dataset configuration
+    train_dataset = ElmoDataset(tokenizer=tokenizer, items=train_items,
+                                stem_key=data_params.get("stem_key", "ques_content"),
+                                label_key=data_params.get("label_key", "difficulty"))
+    if eval_items is not None:
+        eval_dataset = ElmoDataset(tokenizer=tokenizer, items=eval_items,
+                                   stem_key=data_params.get("stem_key", "ques_content"),
+                                   label_key=data_params.get("label_key", "difficulty"))
+    else:
+        eval_dataset = None
+    # model configuration
+    if pretrained_dir is not None:
+        model = ElmoLMForPropertyPrediction.from_pretrained(pretrained_dir, **model_params)
     else:
-        model = ElmoLM(vocab_size=len(tokenizer), embedding_dim=emb_dim, hidden_size=hid_dim, batch_first=True)
+        work_model_params = {
+            "vocab_size": len(tokenizer),
+            "embedding_dim": 512,
+            "hidden_size": 512
+        }
+        work_model_params.update(model_params if model_params else {})
+        model = ElmoLMForPropertyPrediction(**work_model_params)
+    model.elmo.LM_layer.rnn.flatten_parameters()
+
+    # training configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
+    if train_params is not None:
+        work_train_params.update(train_params if train_params else {})
+    work_train_params = TrainingArguments(**work_train_params)
+    trainer = Trainer(
+        model=model,
+        args=work_train_params,
+        train_dataset=train_dataset,
+        eval_dataset=eval_dataset,
+        data_collator=train_dataset.collate_fn,
+    )
+    trainer.train()
+    # trainer.model.save_pretrained(output_dir)
+    assert isinstance(trainer.model, ElmoLMForPropertyPrediction)
+    trainer.save_model(output_dir)
+    trainer.model.save_config(output_dir)
+    tokenizer.save_pretrained(output_dir)
+    return output_dir
+
 
-    if device is None:
-        device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
+def train_elmo_for_knowledge_prediction(
+        train_items: list, output_dir: str, pretrained_dir=None, eval_items=None,
+        tokenizer_params=None, data_params=None, train_params=None, model_params=None
+):
+    """
+    Parameters
+    ----------
+    train_items: list, required
+        The training items, each item could be str or dict
+    output_dir: str, required
+        The directory to save trained model files
+    pretrained_dir: str, optional
+        The pretrained directory for model and tokenizer
+    eval_items: list, required
+        The evaluating items, each item could be str or dict
+    tokenizer_params: dict, optional, default=None
+        The parameters passed to ElmoTokenizer
+    data_params: dict, optional, default=None
+        The parameters passed to ElmoDataset and ElmoTokenizer
+    model_params: dict, optional, default=None
+        The parameters passed to Trainer
+    train_params: dict, optional, default=None
+    """
+    tokenizer_params = tokenizer_params if tokenizer_params else {}
+    data_params = data_params if data_params is not None else {}
+    model_params = model_params if model_params is not None else {}
+    train_params = train_params if train_params is not None else {}
+    # tokenizer configuration
+    if pretrained_dir is not None:
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_dir, **tokenizer_params)
+    else:
+        work_tokenizer_params = {
+            "add_special_tokens": True,
+            "tokenize_method": "pure_text",
+        }
+        work_tokenizer_params.update(tokenizer_params if tokenizer_params else {})
+        tokenizer = ElmoTokenizer(**work_tokenizer_params)
+        corpus_items = train_items + eval_items if eval_items else []
+        tokenizer.set_vocab(corpus_items,
+                            key=lambda x: x[data_params.get("stem_key", "ques_content")])
+    # dataset configuration
+    train_dataset = ElmoDataset(tokenizer=tokenizer, items=train_items,
+                                stem_key=data_params.get("stem_key", "ques_content"),
+                                label_key=data_params.get("label_key", "know_list"))
+    if eval_items is not None:
+        eval_dataset = ElmoDataset(tokenizer=tokenizer, items=eval_items,
+                                   stem_key=data_params.get("stem_key", "ques_content"),
+                                   label_key=data_params.get("label_key", "know_list"))
     else:
-        device = torch.device(device)
-    model.LM_layer.rnn.flatten_parameters()
-    model.to(device)
-    model.train()
-    global_step = 0
-    adam = optim.Adam(model.parameters(), lr=lr)
-    loss_func = nn.BCELoss()
-    loss_func.to(device)
-    dataloader = tud.DataLoader(train_dataset, collate_fn=elmo_collate_fn, batch_size=batch_size, shuffle=True)
-    begin = time.time()
-    for epoch in range(epochs):
-        for step, sample in enumerate(dataloader):
-            pred_mask = sample['pred_mask'].to(device)
-            idx_mask = sample['idx_mask'].to(device)
-            idx = sample['idx'].to(device)
-            length = sample['length'].to(device)
-            try:
-                y = F.one_hot(idx, num_classes=len(tokenizer)).to(device)
-                pred_forward, pred_backward, _, _ = model.forward(idx, length)
-                pred_forward = pred_forward[pred_mask]
-                pred_backward = pred_backward[torch.flip(pred_mask, [1])]
-                y_rev = torch.flip(y, [1])[torch.flip(idx_mask, [1])]
-                y = y[idx_mask]
-                forward_loss = loss_func(pred_forward[:, :-1].double(), y[:, 1:].double())
-                backward_loss = loss_func(pred_backward[:, :-1].double(), y_rev[:, 1:].double())
-                forward_loss.backward(retain_graph=True)
-                backward_loss.backward(retain_graph=True)
-                adam.step()
-                adam.zero_grad()
-                global_step += 1
-                if global_step % 10 == 0:
-                    print("[Global step %d, epoch %d, batch %d] Loss: %.10f" % (
-                        global_step, epoch, step, forward_loss + backward_loss))
-            except RuntimeError as e:
-                print("RuntimeError:", e)
-                print("[DEBUG]Sample idx:", idx)
-    end = time.time()
-    print("Train time: ", (end - begin))
-    model.cpu()
-    config = {
-        'emb_dim': emb_dim,
-        'hid_dim': hid_dim,
-        'batch_first': True,
-        'vocab_size': len(tokenizer)
-    }
-    if not os.path.exists(output_dir):
-        os.makedirs(output_dir)
-    with open(os.path.join(output_dir, 'config.json'), 'w') as f:
-        json.dump(config, f)
-    torch.save(model.state_dict(), os.path.join(output_dir, 'weight.pt'))
-    tokenizer.save_vocab(os.path.join(output_dir, 'vocab.json'))
+        eval_dataset = None
+    # model configuration
+    if pretrained_dir is not None:
+        model = ElmoLMForKnowledgePrediction.from_pretrained(pretrained_dir, **model_params)
+    else:
+        work_model_params = {
+            "vocab_size": len(tokenizer),
+            "embedding_dim": 512,
+            "hidden_size": 512
+        }
+        work_model_params.update(model_params if model_params else {})
+        model = ElmoLMForKnowledgePrediction(**work_model_params)
+    model.elmo.LM_layer.rnn.flatten_parameters()
+
+    # training configuration
+    work_train_params = deepcopy(DEFAULT_TRAIN_PARAMS)
+    work_train_params["output_dir"] = output_dir
+    if train_params is not None:
+        work_train_params.update(train_params if train_params else {})
+    work_train_params = TrainingArguments(**work_train_params)
+    trainer = Trainer(
+        model=model,
+        args=work_train_params,
+        train_dataset=train_dataset,
+        eval_dataset=eval_dataset,
+        data_collator=train_dataset.collate_fn,
+    )
+    trainer.train()
+    assert isinstance(trainer.model, ElmoLMForKnowledgePrediction)
+    trainer.save_model(output_dir)
+    trainer.model.save_config(output_dir)
+    tokenizer.save_pretrained(output_dir)
     return output_dir
diff --git a/EduNLP/Pretrain/gensim_vec.py b/EduNLP/Pretrain/gensim_vec.py
index 0e39c62b..2a1f0dad 100644
--- a/EduNLP/Pretrain/gensim_vec.py
+++ b/EduNLP/Pretrain/gensim_vec.py
@@ -194,7 +194,7 @@ def train_vector(items, w2v_prefix, embedding_dim=None, method="sg", binary=None
     ... 若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$")
     >>> print(token_item[:10])
     [['公式'], [\\FormFigureID{1}], ['如图'], ['[FIGURE]'],...['最大值'], ['[MARK]']]
-    >>> train_vector(token_item[:10], "examples/test_model/w2v/gensim_luna_stem_t_", 100) #doctest: +ELLIPSIS
+    >>> train_vector(token_item[:10], "examples/test_model/w2v/gensim_luna_stem_t_", 100) # doctest: +SKIP
     'examples/test_model/w2v/gensim_luna_stem_t_sg_100.kv'
     """
     monitor = MonitorCallback(["word", "I", "less"])
diff --git a/EduNLP/Pretrain/hugginface_utils.py b/EduNLP/Pretrain/hugginface_utils.py
new file mode 100644
index 00000000..1e29a338
--- /dev/null
+++ b/EduNLP/Pretrain/hugginface_utils.py
@@ -0,0 +1,165 @@
+import os
+import json
+from transformers.file_utils import TensorType
+from transformers import AutoTokenizer
+from typing import List, Optional, Union, Tuple
+from ..SIF import EDU_SPYMBOLS
+from ..Tokenizer import get_tokenizer
+
+
+class TokenizerForHuggingface(object):
+    """
+    Parameterss
+    ----------
+    pretrained_model:
+        used pretrained model
+    add_specials:
+        Whether to add tokens like [FIGURE], [TAG], etc.
+    tokenize_method:
+        Which text tokenizer to use.
+        Must be consistent with TOKENIZER dictionary.
+
+    Returns
+    ----------
+
+    Examples
+    ----------
+    >>> tokenizer = TokenizerForHuggingface(add_special_tokens=True)
+    >>> item = "有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
+    ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"
+    >>> token_item = tokenizer(item)
+    >>> print(token_item.input_ids[:10])
+    tensor([[ 101, 1062, 2466, 1963, 1745,  138,  100,  140,  166,  117,  167, 5276,
+             3338, 3340,  816, 1062, 2466,  102,  168,  134,  166,  116,  128,  167,
+             3297, 1920,  966,  138,  100,  140,  102]])
+    >>> print(tokenizer.tokenize(item)[:10])
+    ['公', '式', '如', '图', '[', '[UNK]', ']', 'x', ',', 'y']
+    >>> items = [item, item]
+    >>> token_items = tokenizer(items, return_tensors='pt')
+    >>> print(token_items.input_ids.shape)
+    torch.Size([2, 31])
+    >>> print(len(tokenizer.tokenize(items)))
+    2
+    >>> tokenizer.save_pretrained('test_dir') # doctest: +SKIP
+    >>> tokenizer = TokenizerForHuggingface.from_pretrained('test_dir') # doctest: +SKIP
+    """
+    def __init__(self, pretrained_model="bert-base-chinese", max_length=512, tokenize_method: str = "pure_text",
+                 add_specials: Union[List[str], bool] = False, **kwargs):
+        self._set_basic_tokenizer(tokenize_method, **kwargs)
+        if isinstance(add_specials, bool):
+            add_specials = EDU_SPYMBOLS if add_specials is True else []
+        else:
+            add_specials = EDU_SPYMBOLS + add_specials
+        self._special_tokens = set()
+        self.max_length = max_length
+        self.bert_tokenizer = AutoTokenizer.from_pretrained(pretrained_model)
+        self.add_specials(add_specials)
+        config = {k: v for k, v in locals().items() if k not in ["self", "__class__", "pretrained_model", "kwargs"]}
+        config.update(kwargs)
+        self.config = config
+
+    def __call__(self, items: Tuple[list, str, dict], key=lambda x: x, padding=True,
+                 return_tensors: Optional[Tuple[str, TensorType, bool]] = True, **kwargs):
+        if isinstance(items, list):
+            text = [self._pre_tokenize(key(i)) for i in items]
+        else:
+            text = self._pre_tokenize(key(items))
+
+        if isinstance(return_tensors, bool):
+            return_tensors = "pt" if return_tensors is True else None
+        encodes = self.bert_tokenizer(text, truncation=True, padding=padding, max_length=self.max_length,
+                                      return_tensors=return_tensors)
+        return encodes
+
+    def __len__(self):
+        return len(self.bert_tokenizer)
+
+    def _set_basic_tokenizer(self, tokenize_method: str = None, **kwargs):
+        self.tokenize_method = tokenize_method
+        if self.tokenize_method is not None:
+            self.text_tokenizer = get_tokenizer(tokenize_method, **kwargs)
+        else:
+            self.text_tokenizer = None
+
+    def _pre_tokenize(self, text: Union[str, dict]):
+        if self.text_tokenizer is not None:
+            text = self.text_tokenizer._tokenize(text)
+            text = " ".join(text)
+        return text
+
+    def tokenize(self, items: Union[list, str, dict], key=lambda x: x, **kwargs):
+        if isinstance(items, list):
+            texts = [self._tokenize(key(i)) for i in items]
+            return texts
+        else:
+            return self._tokenize(key(items))
+
+    def encode(self, items: Tuple[str, dict, List[str], List[dict]], key=lambda x: x, **kwargs):
+        if isinstance(items, str) or isinstance(items, dict):
+            return self.bert_tokenizer.encode(key(items), **kwargs)
+        else:
+            return [self.bert_tokenizer.encode(key(item), **kwargs) for item in items]
+
+    def decode(self, token_ids: list, key=lambda x: x, **kwargs):
+        if isinstance(token_ids[0], list):
+            return [self.bert_tokenizer.decode(key(item), **kwargs) for item in token_ids]
+        else:
+            return self.bert_tokenizer.decode(key(token_ids), **kwargs)
+
+    def _tokenize(self, item: Union[str, dict], key=lambda x: x, **kwargs):
+        item = self._pre_tokenize(key(item))
+        return self.bert_tokenizer.tokenize(item, **kwargs)
+
+    @classmethod
+    def from_pretrained(cls, tokenizer_config_dir, **kwargs):
+        custom_config_dir = os.path.join(tokenizer_config_dir, 'custom_config.json')
+        if os.path.exists(custom_config_dir):
+            with open(custom_config_dir, 'r') as f:
+                custom_config = json.load(f)
+                custom_config.update(kwargs)
+            return cls(tokenizer_config_dir, **custom_config)
+        else:
+            return cls(tokenizer_config_dir, **kwargs)
+
+    def save_pretrained(self, tokenizer_config_dir):
+        self.bert_tokenizer.save_pretrained(tokenizer_config_dir)
+        custom_config = self.config
+        with open(os.path.join(tokenizer_config_dir, 'custom_config.json'), 'w') as f:
+            json.dump(custom_config, f, indent=2)
+
+    @property
+    def vocab_size(self):
+        return len(self.bert_tokenizer)
+
+    def set_vocab(self, items: Tuple[List[str], List[dict]], key=lambda x: x, lower=False,
+                  trim_min_count: int = 1, do_tokenize: bool = True):
+        """
+        Parameters
+        -----------
+        items: list
+            can be the list of str, or list of dict
+        key: function
+            determine how to get the text of each item
+        trim_min_count : int, optional
+            the lower bound number for adding a word into vocabulary, by default 1
+        do_tokenize : bool, optional
+            wheather tokenize items before updating vocab, by default True
+        """
+        word2cnt = dict()
+        for item in items:
+            tokens = self._pre_tokenize(key(item)).split() if do_tokenize else key(item)
+            for word in tokens:
+                word = word.lower() if lower else word
+                word2cnt[word] = word2cnt.get(word, 0) + 1
+        remain_tokens = [w for w, c in word2cnt.items() if c >= trim_min_count]
+        added_num = self.add_tokens(remain_tokens)
+        return remain_tokens, added_num
+
+    def add_specials(self, added_spectials: List[str]):
+        for tok in added_spectials:
+            self._special_tokens.add(tok)
+
+        return self.bert_tokenizer.add_special_tokens({'additional_special_tokens': added_spectials})
+
+    def add_tokens(self, added_tokens: List[str]):
+        return self.bert_tokenizer.add_tokens(added_tokens)
diff --git a/EduNLP/Pretrain/pretrian_utils.py b/EduNLP/Pretrain/pretrian_utils.py
new file mode 100644
index 00000000..dfa2fc1b
--- /dev/null
+++ b/EduNLP/Pretrain/pretrian_utils.py
@@ -0,0 +1,472 @@
+from typing import Optional, Union, List, Dict, Any, Iterable, Tuple
+import traceback
+import torch
+import os
+import json
+import pandas as pd
+from datasets import Dataset as HFDataset, load_from_disk
+from torch.utils.data import Dataset
+from ..Tokenizer import get_tokenizer
+from ..ModelZoo.utils import pad_sequence
+from ..SIF import EDU_SPYMBOLS
+
+
+__all__ = ["EduVocab", "EduDataset", "PretrainedEduTokenizer"]
+
+
+class EduVocab(object):
+    """The vocabulary container for a corpus.
+
+    Parameters
+    ----------
+    vocab_path : str, optional
+        vocabulary path to initialize this container, by default None
+    corpus_items : List[str], optional
+        corpus items to update this vocabulary, by default None
+    bos_token : str, optional
+        token representing for the start of a sentence, by default "[BOS]"
+    eos_token : str, optional
+        token representing for the end of a sentence, by default "[EOS]"
+    pad_token : str, optional
+        token representing for padding, by default "[PAD]"
+    unk_token : str, optional
+        token representing for unknown word, by default "[UNK]"
+    specials : List[str], optional
+        spacials tokens in vocabulary, by default None
+    lower : bool, optional
+        wheather to lower the corpus items, by default False
+    trim_min_count : int, optional
+        the lower bound number for adding a word into vocabulary, by default 1
+    """
+    def __init__(self, vocab_path: str = None, corpus_items: List[str] = None, bos_token: str = "[BOS]",
+                 eos_token: str = "[EOS]", pad_token: str = "[PAD]", unk_token: str = "[UNK]",
+                 specials: List[str] = None, lower: bool = False, trim_min_count: int = 1, **kwargs):
+        super(EduVocab, self).__init__()
+
+        self._tokens = []
+        self.idx_to_token = dict()
+        self.token_to_idx = dict()
+        self.frequencies = dict()
+        # 定义特殊词
+        self.bos_token = bos_token
+        self.eos_token = eos_token
+        self.pad_token = pad_token
+        self.unk_token = unk_token
+        self._special_tokens = [self.pad_token, self.unk_token, self.bos_token, self.eos_token]
+
+        if specials:
+            self._special_tokens += specials
+        for st in self._special_tokens:
+            self._add(st)
+        # 加载词典
+        if vocab_path is not None:
+            self.load_vocab(vocab_path)
+        elif corpus_items is not None:
+            self.set_vocab(corpus_items, lower, trim_min_count)
+
+        self.bos_idx = self.token_to_idx[self.bos_token]
+        self.eos_idx = self.token_to_idx[self.eos_token]
+        self.pad_idx = self.token_to_idx[self.pad_token]
+        self.unk_idx = self.token_to_idx[self.unk_token]
+
+    def __len__(self):
+        return len(self._tokens)
+
+    @property
+    def vocab_size(self):
+        return len(self._tokens)
+
+    @property
+    def special_tokens(self):
+        return self._special_tokens
+
+    @property
+    def tokens(self):
+        return self._tokens
+
+    def to_idx(self, token):
+        """convert token to index"""
+        return self.token_to_idx.get(token, self.unk_idx)
+
+    def to_token(self, idx):
+        """convert index to index"""
+        return self.idx_to_token.get(idx, self.unk_token)
+
+    def convert_sequence_to_idx(self, tokens, bos=False, eos=False):
+        """convert sentence of tokens to sentence of indexs"""
+        res = [self.to_idx(t) for t in tokens]
+        if bos is True:
+            res = [self.bos_idx] + res
+        if eos is True:
+            res = res + [self.eos_idx]
+        return res
+
+    def convert_sequence_to_token(self, idxs, **kwargs):
+        """convert sentence of indexs to sentence of tokens"""
+        return [self.to_token(i) for i in idxs]
+
+    def set_vocab(self, corpus_items: List[str], lower: bool = False, trim_min_count: int = 1, silent=True):
+        """Update the vocabulary with the tokens in corpus items
+
+        Parameters
+        ----------
+        corpus_items : List[str], optional
+            corpus items to update this vocabulary, by default None
+        lower : bool, optional
+            wheather to lower the corpus items, by default False
+        trim_min_count : int, optional
+            the lower bound number for adding a word into vocabulary, by default 1
+        """
+        word2cnt = dict()
+        for item in corpus_items:
+            for word in item:
+                word = word.lower() if lower else word
+                word2cnt[word] = word2cnt.get(word, 0) + 1
+        words = [w for w, c in word2cnt.items() if c >= trim_min_count and w not in self._special_tokens]
+        for token in words:
+            self._add(token)
+        if not silent:
+            keep_word_cnts = sum(word2cnt[w] for w in words)
+            all_word_cnts = sum(word2cnt.values())
+            print(f"save words(trim_min_count={trim_min_count}): {len(words)}/{len(word2cnt)} = {len(words) / len(word2cnt):.4f}\
+                  with frequency {keep_word_cnts}/{all_word_cnts}={keep_word_cnts / all_word_cnts:.4f}")
+
+    def load_vocab(self, vocab_path: str):
+        """Load the vocabulary from vocab_file
+
+        Parameters
+        ----------
+        vocab_path : str
+            path to save vocabulary file
+        """
+        with open(vocab_path, "r", encoding="utf-8") as file:
+            self._tokens = file.read().strip().split('\n')
+            self.token_to_idx = {token: idx for idx, token in enumerate(self._tokens)}
+            self.idx_to_token = {idx: token for idx, token in enumerate(self._tokens)}
+
+    def save_vocab(self, vocab_path: str):
+        """Save the vocabulary into vocab_file
+
+        Parameters
+        ----------
+        vocab_path : str
+            path to save vocabulary file
+        """
+        with open(vocab_path, 'w', encoding='utf-8') as file:
+            for i in range(self.vocab_size):
+                token = self._tokens[i]
+                file.write(f"{token}\n")
+
+    def _add(self, token: str):
+        if token not in self._tokens:
+            idx = len(self._tokens)
+            self._tokens.append(token)
+            self.idx_to_token[idx] = token
+            self.token_to_idx[token] = idx
+
+    def add_specials(self, tokens: List[str]):
+        """Add special tokens into vocabulary"""
+        for token in tokens:
+            if token not in self._special_tokens:
+                self._special_tokens += [token]
+                self._add(token)
+
+    def add_tokens(self, tokens: List[str]):
+        """Add tokens into vocabulary"""
+        for token in tokens:
+            self._add(token)
+
+
+# to do: how to handle tokenizer with formulas or pictures.
+class PretrainedEduTokenizer(object):
+    """This base class is in charge of preparing the inputs for a model
+
+    Parameters
+    ----------
+    vocab_path : str, optional
+        _description_, by default None
+    max_length : int, optional
+        used to clip the sentence out of max_length, by default None
+    tokenize_method : str, optional
+        default: "space"
+        - when text is already seperated by space, use "space"
+        - when text is raw string format, use Tokenizer defined in get_tokenizer(), such as "pure_text" and "text"
+    add_specials : Tuple[list, bool], optional
+        by default None
+        - For bool, it means whether to add EDU_SPYMBOLS to vocabulary
+        - For list, it means the added special tokens besides EDU_SPYMBOLS
+    """
+    def __init__(self, vocab_path: str = None, max_length: int = 250, tokenize_method: str = "pure_text",
+                 add_specials: Tuple[list, bool] = False, **kwargs):
+        self._set_basic_tokenizer(tokenize_method, **kwargs)
+        if isinstance(add_specials, bool):
+            add_specials = EDU_SPYMBOLS if add_specials else []
+        else:
+            add_specials = EDU_SPYMBOLS + add_specials
+        self.max_length = max_length
+        self.vocab = EduVocab(vocab_path=vocab_path, specials=add_specials, **kwargs)
+
+        self.config = {k: v for k, v in locals().items() if k not in ["self", "__class__", "vocab_path"]}
+
+    def __call__(self, items: Tuple[list, str, dict], key=lambda x: x, padding: Tuple[bool, str] = True,
+                 max_length=None, return_tensors=True, return_text=False, **kwargs) -> Dict[str, Any]:
+        """
+        Parameters
+        ----------
+        items: list or str or dict
+            the question items
+        key: function
+            determine how to get the text of each item
+        padding: bool
+            whether to pad the seq_idx
+        return_tensors: bool
+            whether to return data as tensors (would ignore text tokens)
+        return_text: bool
+            whether to return text tokens
+
+        Returns
+        -------
+        ret: dict
+            {"seq_idx": None, "seq_len": None}
+            or {"seq_token": None, seq_idx": None, "seq_len": None}.
+            The shape of element is (batch, seq) or (batch,).
+
+        Notes:
+        -------
+        Be Make sure Tokenizer output batched tensors by default
+        """
+        batch_max_length = None
+        max_length = self.max_length if max_length is None else max_length
+        if isinstance(padding, str):
+            if padding == "max_length":
+                batch_max_length = max_length
+                padding = True
+            elif padding == "longest":
+                padding = True
+            elif padding == "do_not_pad":
+                padding = False
+            else:
+                raise ValueError("'padding' must be `bool` or `string` in ['max_length', 'longest', 'do_not_pad']")
+
+        token_items = self.tokenize(items, key)
+        if isinstance(items, dict) or isinstance(items, str):
+            token_items = [token_items]
+        if max_length is not None:
+            token_items = [seq[:max_length] for seq in token_items]
+        seqs = [self.vocab.convert_sequence_to_idx(token_item,
+                                                   bos=kwargs.get("bos", False),
+                                                   eos=kwargs.get("eos", False)) for token_item in token_items]
+        lengths = [len(seq) for seq in seqs]
+        ret = {
+            "seq_idx": pad_sequence(seqs, pad_val=self.vocab.pad_idx, max_length=batch_max_length) if padding else seqs,
+            "seq_len": lengths
+        }
+        if isinstance(items, dict) or isinstance(items, str):
+            ret = {k: v[0] for k, v in ret.items()}
+            token_items = token_items[0]
+        if return_tensors:
+            ret = {key: torch.as_tensor(val) for key, val in ret.items()}
+        if return_text:
+            ret["seq_token"] = token_items
+        return ret
+
+    def __len__(self):
+        return len(self.vocab)
+
+    def _set_basic_tokenizer(self, tokenize_method: str, **kwargs):
+        self.tokenize_method = tokenize_method
+        self.text_tokenizer = get_tokenizer(tokenize_method, **kwargs)
+
+    def tokenize(self, items: Tuple[list, str, dict], key=lambda x: x, **kwargs):
+        """
+        Parameters
+        ----------
+        items: list or str or dict
+            the question items
+        key: function
+            determine how to get the text of each item
+
+        Returns
+        -------
+        tokens: list
+            the token of items
+        """
+        if isinstance(items, str) or isinstance(items, dict):
+            return self._tokenize(items, key=key)
+        else:
+            return [self._tokenize(item, key=key) for item in items]
+
+    def encode(self, items: Tuple[str, dict, List[str], List[dict]], key=lambda x: x, **kwargs):
+        if isinstance(items, str) or isinstance(items, dict):
+            return self.vocab.convert_sequence_to_idx(self.tokenize(key(items)), **kwargs)
+        else:
+            return [self.vocab.convert_sequence_to_idx(self.tokenize(key(item)), **kwargs) for item in items]
+
+    def decode(self, token_ids: list, key=lambda x: x, **kwargs):
+        if isinstance(token_ids[0], list):
+            return [self.vocab.convert_sequence_to_token(key(item), **kwargs) for item in token_ids]
+        else:
+            return self.vocab.convert_sequence_to_token(key(token_ids), **kwargs)
+
+    def _pad(self):
+        raise NotImplementedError
+
+    def _tokenize(self, item: Tuple[str, dict], key=lambda x: x):
+        token_item = self.text_tokenizer._tokenize(item, key=key)
+        if len(token_item) == 0:
+            token_item = [self.vocab.unk_token]
+        if len(token_item) > self.max_length:
+            token_item = token_item[:self.max_length]
+        return token_item
+
+    @classmethod
+    def from_pretrained(cls, tokenizer_config_dir: str, **kwargs):
+        """Load tokenizer from local files
+
+        Parameters:
+        -----------
+        tokenizer_config_dir: str
+            The dir path containing tokenizer_config.json and vocab.list
+        """
+        tokenizer_config_path = os.path.join(tokenizer_config_dir, "tokenizer_config.json")
+        pretrained_vocab_path = os.path.join(tokenizer_config_dir, "vocab.txt")
+
+        with open(tokenizer_config_path, "r", encoding="utf-8") as rf:
+            tokenizer_config = json.load(rf)
+            tokenizer_config.update(kwargs)
+            return cls(
+                vocab_path=pretrained_vocab_path,
+                **tokenizer_config)
+
+    def save_pretrained(self, tokenizer_config_dir: str):
+        """Save tokenizer into local files
+
+        Parameters:
+        -----------
+        tokenizer_config_dir: str
+            save tokenizer params in `/tokenizer_config.json` and save words in `/vocab.list`
+        """
+        if not os.path.exists(tokenizer_config_dir):
+            os.makedirs(tokenizer_config_dir, exist_ok=True)
+        tokenizer_config_path = os.path.join(tokenizer_config_dir, "tokenizer_config.json")
+        vocab_path = os.path.join(tokenizer_config_dir, "vocab.txt")
+        self.vocab.save_vocab(vocab_path)
+
+        with open(tokenizer_config_path, "w", encoding="utf-8") as wf:
+            json.dump(self.config, wf, ensure_ascii=False, indent=2)
+
+    @property
+    def vocab_size(self):
+        return len(self.vocab)
+
+    def set_vocab(self, items: list, key=lambda x: x, lower: bool = False,
+                  trim_min_count: int = 1, do_tokenize: bool = True):
+        """Update the vocabulary with the tokens in corpus items
+
+        Parameters
+        ----------
+        items: list
+            can be the list of str, or list of dict
+        key: function, optional
+            determine how to get the text of each item
+        lower : bool, optional
+            wheather to lower the corpus items, by default False
+        trim_min_count : int, optional
+            the lower bound number for adding a word into vocabulary, by default 1
+        do_tokenize : bool, optional
+            wheather tokenize items before updating vocab, by default True
+
+        Returns
+        -------
+        list
+            token_items
+        """
+        token_items = self.tokenize(items, key) if do_tokenize else [key(item) for item in items]
+        self.vocab.set_vocab(corpus_items=token_items, trim_min_count=trim_min_count, lower=lower)
+        return token_items
+
+    def add_specials(self, tokens):
+        """Add special tokens into vocabulary"""
+        self.vocab.add_specials(tokens)
+
+    def add_tokens(self, tokens):
+        """Add tokens into vocabulary"""
+        self.vocab.add_tokens(tokens)
+
+
+class EduDataset(Dataset):
+    """The base class implements a Dataset, which package the `datasets.Dataset`
+    and provide more convenience, including parallel preprocessing, offline loadding and so on.
+
+    Parameters
+    ----------
+    tokenizer :
+        PretrainedEduTokenizer or model-specific Pretrained Tokenizer
+    ds_disk_path : HFDataset, optional
+        the dataset_path to save dataset used by `datasets.Dataset`, by default None
+    items : Union[List[dict], List[str]], optional
+        input items to process, by default None
+    stem_key : str, optional
+        the content of items to process, by default "text"
+    label_key : Optional[str], optional
+        the labels of items to process, by default None
+    feature_keys : Optional[List[str]], optional
+        the additional features of items to remain, by default None
+    num_processor : int, optional
+        specific the number of cpus for parallel speedup, by default None
+    """
+    def __init__(self, tokenizer, ds_disk_path: HFDataset = None,
+                 items: Union[List[dict], List[str]] = None,
+                 stem_key: str = "text", label_key: Optional[str] = None,
+                 feature_keys: Optional[List[str]] = None,
+                 num_processor: int = None, **kwargs):
+        self.tokenizer = tokenizer
+        feature_keys = [] if feature_keys is None else feature_keys
+        if items is not None:
+            assert ds_disk_path is None
+            if isinstance(items[0], dict):
+                assert stem_key is not None
+                raw_columns = set(items[0].keys())
+            if isinstance(items[0], str):
+                assert stem_key is None and label_key is None
+                stem_key = "text"
+                raw_columns = set([stem_key])
+            work_columns = set([stem_key] + feature_keys + ([label_key] if label_key is not None else []))
+            redundant_columns = raw_columns - work_columns
+            # 在线预处理特征
+            items = items if isinstance(items[0], dict) else [{"text": i} for i in items]
+            df = pd.DataFrame(items)
+            df.drop(columns=list(redundant_columns), inplace=True)
+            self.ds = HFDataset.from_pandas(df)
+            """Note: map will break down for super large data which is greater than 4GB """
+            self.ds = self.ds.map(lambda sample: tokenizer(sample[stem_key], return_tensors=False),
+                                  num_proc=num_processor,
+                                  batched=True, batch_size=1000)
+            remove_columns = [stem_key]
+        else:
+            # 离线加载工作特征
+            assert ds_disk_path is not None
+            self.ds = load_from_disk(ds_disk_path)
+            reserve_columns = list(tokenizer("edunlp", return_tensors=False).keys())\
+                + feature_keys + ([label_key] if label_key is not None else [])
+            remove_columns = list(set(self.ds.column_names) - set(reserve_columns))
+
+        # 工作特征
+        self.work_ds = self.ds.remove_columns(remove_columns) if len(remove_columns) > 0 else self.ds
+        if label_key is not None:
+            self.work_ds = self.work_ds.rename_columns({
+                label_key: "labels",
+            })
+
+    def __getitem__(self, index):
+        return self.work_ds[index]
+
+    def __len__(self):
+        return self.work_ds.num_rows
+
+    def to_disk(self, ds_disk_path):
+        """Save the processed dataset into local files"""
+        self.ds.save_to_disk(ds_disk_path)
+
+    def collect_fn(self):
+        raise NotImplementedError
diff --git a/EduNLP/Pretrain/quesnet_vec.py b/EduNLP/Pretrain/quesnet_vec.py
index bd35918b..da3899b6 100644
--- a/EduNLP/Pretrain/quesnet_vec.py
+++ b/EduNLP/Pretrain/quesnet_vec.py
@@ -3,7 +3,8 @@
 
 import os
 import logging
-
+from pickle import NONE
+import warnings
 import numpy as np
 import torch
 from torch.utils.data import DataLoader, Dataset
@@ -17,19 +18,19 @@
 import math
 import queue
 import random
-from typing import Union, Optional
 from PIL import Image
 from torchvision.transforms.functional import to_grayscale
 from torchvision.transforms.functional import to_tensor
 from gensim.models import Word2Vec
 from ..SIF.segment.segment import FigureSegment
-
 from ..SIF.segment import seg
 from ..SIF.tokenization import tokenize
-from ..ModelZoo.quesnet import QuesNet, AE
+from ..SIF import EDU_SPYMBOLS
+from ..ModelZoo.quesnet import QuesNetForPreTraining, AE
+from .pretrian_utils import PretrainedEduTokenizer
 from EduNLP import logger
 import linecache
-import subprocess
+from typing import List, Union, Optional
 
 Question = namedtuple('Question',
                       ['id', 'content', 'answer', 'false_options', 'labels'])
@@ -43,7 +44,7 @@ def save_list(item2index, path):
     return
 
 
-class QuesNetTokenizer(object):
+class QuesNetTokenizer(PretrainedEduTokenizer):
     """
     Examples
     --------
@@ -53,16 +54,18 @@ class QuesNetTokenizer(object):
     ... "knowledge": "['*', '-', '/']"}]
     >>> tokenizer.set_vocab(test_items,
     ... trim_min_count=1, key=lambda x: x["ques_content"], silent=True)
+    >>> tokenizer.set_meta_vocab(test_items, silent=True)
     >>> token_items = [tokenizer(i, key=lambda x: x["ques_content"]) for i in test_items]
     >>> print(token_items[0].keys())
-    dict_keys(['content_idx', 'meta_idx'])
+    dict_keys(['seq_idx', 'meta_idx'])
     >>> token_items = tokenizer(test_items, key=lambda x: x["ques_content"])
-    >>> print(len(token_items["content_idx"]))
+    >>> print(len(token_items["seq_idx"]))
     2
     """
 
-    def __init__(self, img_dir=None, vocab_path=None, max_length=250, meta=None,
-                 img_token='<img>', unk_token="<unk>", pad_token="<pad>", *args, **argv):
+    def __init__(self, vocab_path=None, meta_vocab_dir=None, img_dir: str = None,
+                 max_length=250, tokenize_method="custom", symbol="mas", add_specials: list = None,
+                 meta: List[str] = None, img_token='<img>', unk_token="<unk>", pad_token="<pad>", **kwargs):
         """
         Parameters
         ----------
@@ -81,50 +84,39 @@ def __init__(self, img_dir=None, vocab_path=None, max_length=250, meta=None,
         pad_token : str, optional
             by default "<pad>"
         """
-
+        if add_specials is None:
+            add_specials = [img_token]
+        else:
+            add_specials = [img_token] + add_specials
+        self.tokenization_params = {
+            "formula_params": {
+                "method": "linear",
+                "skip_figure_formula": True
+            }
+        }
+        kwargs.update(self.tokenization_params)
+        super().__init__(vocab_path=vocab_path, max_length=max_length, tokenize_method=tokenize_method,
+                         add_specials=add_specials, unk_token=unk_token, pad_token=pad_token, symbol=symbol, **kwargs)
         if meta is None:
             meta = ['know_name']
         self.img_dir = img_dir
         self.img_token = img_token
         self.unk_token = unk_token
         self.pad_token = pad_token
-        self.max_length = max_length
         self.meta = meta
+        self.meta_vocab_dir = meta_vocab_dir
 
         self.stoi = dict()
         self.itos = dict()
-        if vocab_path is not None:
-            self.load_vocab(vocab_path)
-        else:
-            self.secure = False
-
-        self.tokenization_params = {
-            "formula_params": {
-                "method": "linear",
-                "skip_figure_formula": True
-            }
+        self.stoi['word'] = self.vocab.token_to_idx
+        self.itos['word'] = self.vocab.idx_to_token
+        if meta_vocab_dir is not None:
+            self.load_meta_vocab(meta_vocab_dir=meta_vocab_dir)
+        self.config = {
+            k: v for k, v in locals().items() if k not in [
+                "self", "__class__", "vocab_path", 'img_dir', 'meta_vocab_dir']
         }
 
-    def tokenize(self, item: Union[str, dict, list], key=lambda x: x, *args, **kwargs):
-        if not self.secure:
-            raise Exception("Must set the vocab first before tokenize item (either set_vocab() or load_vocab() )")
-        # img保留为\FigureID{}的格式，在__call__中处理为图片
-        if isinstance(item, list):
-            token_text = []
-            for i in item:
-                token_text.append(self._tokenize(i, key, *args, **kwargs))
-        else:
-            token_text = self._tokenize(item, key, *args, **kwargs)
-        return token_text
-
-    def _tokenize(self, item: Union[str, dict], key=lambda x: x, *args, **kwargs):
-        token_text = tokenize(seg(key(item), symbol="mas"), **self.tokenization_params).tokens
-        if len(token_text) == 0:
-            token_text = [self.unk_token]
-        if len(token_text) > self.max_length:
-            token_text = token_text[:self.max_length]
-        return token_text
-
     def __call__(self, item: Union[str, dict, list], key=lambda x: x,
                  meta: Optional[list] = None,
                  padding=False, return_text=False, *args, **kwargs):
@@ -134,24 +126,24 @@ def __call__(self, item: Union[str, dict, list], key=lambda x: x,
         key: function
             determine how to get the text of each item
         padding: bool
-            whether to pad the content_idx
+            whether to pad the seq_idx
         return_text: bool
             whether to return text tokens
         """
         if isinstance(item, list):
             ret = {
-                "content_idx": [],
+                "seq_idx": [],
                 "meta_idx": []
             }
             if return_text:
-                ret["content"] = []
+                ret["seq_token"] = []
                 ret["meta"] = []
             for i in item:
                 r = self._convert_to_ids(i, key, meta, padding, return_text, *args, **kwargs)
-                ret["content_idx"].append(r["content_idx"])
+                ret["seq_idx"].append(r["seq_idx"])
                 ret["meta_idx"].append(r["meta_idx"])
                 if return_text:
-                    ret["content"].append(r["content"])
+                    ret["seq_token"].append(r["seq_token"])
                     ret["meta"].append(r["meta"])
         else:
             ret = self._convert_to_ids(item, key, meta, padding, return_text, *args, **kwargs)
@@ -171,6 +163,7 @@ def _convert_to_ids(self, item: Union[str, dict, list], key=lambda x: x,
                     im = im.resize((56, 56))
                     token_idx.append(to_grayscale(im))
                 except Exception:
+                    warnings.warn('Open image error!')
                     token_idx.append(self.stoi['word'][self.img_token])
             else:
                 # word
@@ -197,32 +190,19 @@ def _convert_to_ids(self, item: Union[str, dict, list], key=lambda x: x,
                     meta_idx.append(self.stoi[m].get(k) or self.stoi[m][self.unk_token])
             meta_idxs[m] = meta_idx
         ret = {
-            "content_idx": self.padding(token_idx, self.max_length) if padding else token_idx,
+            "seq_idx": self.padding(token_idx, self.max_length) if padding else token_idx,
             "meta_idx": meta_idxs
         }
 
         if return_text:
-            ret["content"] = token_item
+            ret["seq_token"] = token_item
             ret["meta"] = meta_items
         return ret
 
-    def load_vocab(self, path):
-        """
-
-        Parameters
-        ----------
-        path : str
-            path of vocabulary files
-            it must be a directory containing word.txt (meta.txt is optional)
-        """
-        self.secure = True
-        with open(os.path.join(path, 'word.txt'), "rt", encoding="utf-8") as f:
-            words = f.read().strip().split('\n')
-            self.stoi['word'] = {word: index for index, word in enumerate(words)}
-            self.itos['word'] = {i: s for s, i in self.stoi['word'].items()}
+    def load_meta_vocab(self, meta_vocab_dir):
         for m in self.meta:
             try:
-                with open(os.path.join(path, f'meta_{m}.txt'), "rt", encoding="utf-8") as f:
+                with open(os.path.join(meta_vocab_dir, f'meta_{m}.txt'), "rt", encoding="utf-8") as f:
                     meta = f.read().strip().split('\n')
                     self.stoi[m] = {word: index for index, word in enumerate(meta)}
                     self.itos[m] = {i: s for s, i in self.stoi[m].items()}
@@ -230,38 +210,8 @@ def load_vocab(self, path):
                 self.stoi[m] = None
                 self.itos[m] = None
 
-    def set_vocab(self, items: list, key=lambda x: x, trim_min_count=50, silent=True):
-        """
-        Parameters
-        -----------
-        items: list
-            can be the list of str, or list of dict
-        key: function
-            determine how to get the text of each item
-        trim_min_count
-        silent
-        """
-        self.secure = True
-        # word
-        word2cnt = dict()
-        for item in items:
-            token_item = self.tokenize(item, key=key)
-            for w in token_item:
-                if not isinstance(w, FigureSegment):
-                    word2cnt[w] = word2cnt.get(w, 0) + 1
-        ctrl_tokens = [self.unk_token, self.img_token, self.pad_token]
-        words = [w for w, c in word2cnt.items() if c >= trim_min_count and w not in ctrl_tokens]
-        if not silent:
-            keep_word_cnts = sum(word2cnt[w] for w in words)
-            all_word_cnts = sum(word2cnt.values())
-            print(f"save words({trim_min_count}): {len(words)}/{len(word2cnt)} = {len(words) / len(word2cnt):.4f}\
-                  with frequency {keep_word_cnts}/{all_word_cnts}={keep_word_cnts / all_word_cnts:.4f}")
-
-        vocab = ctrl_tokens + sorted(words)
-        self.stoi['word'] = {word: index for index, word in enumerate(vocab)}
-        self.itos['word'] = {i: s for s, i in self.stoi['word'].items()}
-
-        # meta
+    def set_meta_vocab(self, items: list, meta: List[str] = None, silent=True):
+        self.meta = meta if meta is not None else self.meta
         for m in self.meta:
             meta = set()
             if m in items[0]:
@@ -282,67 +232,73 @@ def set_vocab(self, items: list, key=lambda x: x, trim_min_count=50, silent=True
             self.stoi[m] = {word: index for index, word in enumerate(meta)}
             self.itos[m] = {i: s for s, i in self.stoi[m].items()}
 
-    def save_vocab(self, save_vocab_path):
+    def set_vocab(self, items: list, key=lambda x: x, lower: bool = False,
+                  trim_min_count: int = 1, do_tokenize: bool = True, silent=True):
         """
-
         Parameters
-        ----------
-        save_vocab_path : str
-            path to save word vocabulary and meta vocabulary
+        -----------
+        items: list
+            can be the list of str, or list of dict
+        key: function
+            determine how to get the text of each item
+        trim_min_count : int, optional
+            the lower bound number for adding a word into vocabulary, by default 1
+        silent
         """
-        save_list(self.stoi['word'], os.path.join(save_vocab_path, 'word.txt'))
-        for m in self.meta:
-            save_list(self.stoi[m], os.path.join(save_vocab_path, f'meta_{m}.txt'))
+        token_items = self.tokenize(items, key) if do_tokenize else [key(item) for item in items]
+        self.vocab.set_vocab(corpus_items=token_items, trim_min_count=trim_min_count, lower=lower, silent=silent)
+        self.stoi['word'] = self.vocab.token_to_idx
+        self.itos['word'] = self.vocab.idx_to_token
 
     @classmethod
-    def from_pretrained(cls, tokenizer_config_dir, img_dir=None):
+    def from_pretrained(cls, tokenizer_config_dir, img_dir=None, **kwargs):
         """
         Parameters:
         -----------
         tokenizer_config_dir: str
-            must contain tokenizer_config.json and vocab/word.txt vocab/meta_{meta_name}.txt
+            must contain tokenizer_config.json and vocab.txt and meta_{meta_name}.txt
         img_dir: str
             default None
             the path of image directory
         """
         tokenizer_config_path = os.path.join(tokenizer_config_dir, "tokenizer_config.json")
-        pretrained_vocab_path = os.path.join(tokenizer_config_dir, "vocab")
+        pretrained_vocab_path = os.path.join(tokenizer_config_dir, "vocab.txt")
         with open(tokenizer_config_path, "r", encoding="utf-8") as rf:
             tokenizer_config = json.load(rf)
+            tokenizer_config.update(kwargs)
             return cls(
-                vocab_path=pretrained_vocab_path, max_length=tokenizer_config["max_length"],
-                img_token=tokenizer_config["img_token"], unk_token=tokenizer_config["unk_token"],
-                pad_token=tokenizer_config["pad_token"], meta=tokenizer_config["meta"], img_dir=img_dir)
+                vocab_path=pretrained_vocab_path,
+                meta_vocab_dir=tokenizer_config_dir,
+                img_dir=img_dir,
+                max_length=tokenizer_config["max_length"],
+                tokenize_method=tokenizer_config["tokenize_method"],
+                meta=tokenizer_config["meta"],
+                img_token=tokenizer_config["img_token"],
+                unk_token=tokenizer_config["unk_token"],
+                pad_token=tokenizer_config["pad_token"])
 
     def save_pretrained(self, tokenizer_config_dir):
-        """
+        """Save tokenizer into local files
+
         Parameters:
         -----------
         tokenizer_config_dir: str
-            save tokenizer params in tokenizer_config.json and save words in vocab.list
+            save tokenizer params in `/tokenizer_config.json` and save words in `vocab.txt`
+            and save metas in `meta_{meta_name}.txt`
         """
+        if not os.path.exists(tokenizer_config_dir):
+            os.makedirs(tokenizer_config_dir, exist_ok=True)
         tokenizer_config_path = os.path.join(tokenizer_config_dir, "tokenizer_config.json")
-        save_vocab_path = os.path.join(tokenizer_config_dir, "vocab")
-        os.makedirs(save_vocab_path, exist_ok=True)
-        tokenizer_params = {
-            "img_token": self.img_token,
-            "unk_token": self.unk_token,
-            "pad_token": self.pad_token,
-            "max_length": self.max_length,
-            "meta": self.meta
-        }
-        self.save_vocab(save_vocab_path)
+        self.vocab.save_vocab(os.path.join(tokenizer_config_dir, "vocab.txt"))
+        for m in self.meta:
+            save_list(self.stoi[m], os.path.join(tokenizer_config_dir, f'meta_{m}.txt'))
         with open(tokenizer_config_path, "w", encoding="utf-8") as wf:
-            json.dump(tokenizer_params, wf, ensure_ascii=False, indent=2)
+            json.dump(self.config, wf, ensure_ascii=False, indent=2)
 
     def padding(self, idx, max_length, type='word'):
         padding_idx = idx + [self.stoi[type][self.pad_token]] * (max_length - len(idx))
         return padding_idx
 
-    @property
-    def vocab_size(self):
-        return len(self.stoi['word'])
-
     def set_img_dir(self, path):
         self.img_dir = path
 
@@ -358,7 +314,7 @@ def clip(v, low, high):
 class Lines:
     def __init__(self, filename, skip=0, preserve_newline=False):
         self.filename = filename
-        with open(filename) as f:
+        with open(filename, "r", encoding="utf-8") as f:
             self.length = len(f.readlines()) - skip
         assert self.length > 0, f'{filename} is empty. Or file length is less than skip length.'
         self.skip = skip
@@ -378,9 +334,9 @@ def __getitem__(self, item):
                 line = linecache.getline(self.filename,
                                          item % len(self) + d)
                 if self.preserve_newline:
-                    return line
+                    return json.loads(line)
                 else:
-                    return line.strip('\r\n')
+                    return json.loads(line.strip('\r\n'))
 
         elif isinstance(item, slice):
             low = 0 if item.start is None else item.start
@@ -396,7 +352,7 @@ def __getitem__(self, item):
                 line = linecache.getline(self.filename, i + d)
                 if not self.preserve_newline:
                     line = line.strip('\r\n')
-                ls.append(line)
+                ls.append(json.loads(line))
 
             return ls
 
@@ -404,7 +360,7 @@ def __getitem__(self, item):
 
 
 class QuestionLoader:
-    def __init__(self, ques_file, tokenizer: QuesNetTokenizer,
+    def __init__(self, ques: Lines, tokenizer: QuesNetTokenizer,
                  pipeline=None, range=None, meta: Optional[list] = None,
                  content_key=lambda x: x['ques_content'],
                  meta_key=lambda x: x['know_name'],
@@ -435,7 +391,7 @@ def __init__(self, ques_file, tokenizer: QuesNetTokenizer,
             skip the first several lines, by default 0
         """
         self.range = None
-        self.ques = Lines(ques_file, skip=1)
+        self.ques = ques
         self.range = range or slice(0, len(self), skip)
         self.img_dir = tokenizer.img_dir
         self.labels = []
@@ -472,21 +428,21 @@ def __getitem__(self, x):
         if item.start > len(self):
             raise IndexError
         for line in self.ques[item]:
-            q = json.loads(line)
+            q = line
             qid = q['ques_id']
             token = self.tokenizer(q, key=self.content_key, meta=self.meta)
-            content = token['content_idx']
+            content = token['seq_idx']
             meta = token['meta_idx']
             if self.answer_key(q).isalpha() and len(self.answer_key(q)) == 1 and ord(self.answer_key(q)) < 128 and len(
                     self.option_key(q)) > 0:
                 answer_idx = ord(self.answer_key(q).upper()) - ord('A')
                 options = self.option_key(q)
                 answer = self.tokenizer(options.pop(answer_idx), meta=self.meta)
-                answer = answer['content_idx']
-                false_options = [(self.tokenizer(option, meta=self.meta))['content_idx'] for option in options]
+                answer = answer['seq_idx']
+                false_options = [(self.tokenizer(option, meta=self.meta))['seq_idx'] for option in options]
                 qs.append(Question(qid, content, answer, false_options, meta))
             else:
-                answer = (self.tokenizer(self.answer_key(q), meta=self.meta))['content_idx']
+                answer = (self.tokenizer(self.answer_key(q), meta=self.meta))['seq_idx']
                 qs.append(Question(qid, content, answer, [[0], [0], [0]], meta))
 
         if callable(self.pipeline):
@@ -584,7 +540,7 @@ def __getitem__(self, idx):
         if self.data_type == 'image':
             return to_tensor(self.data[idx])
         elif self.data_type == 'meta':
-            return torch.tensor(self.data[idx])
+            return self.data[idx]
 
 
 def pretrain_iter(ques, batch_size):
@@ -633,7 +589,7 @@ def pretrain_embedding_layer(dataset: EmbeddingDataset, ae: AE, lr: float = 1e-3
     return ae
 
 
-def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=None):
+def pretrain_quesnet(path, output_dir, img_dir=None, save_embs=False, train_params=None):
     """ pretrain quesnet
 
     Parameters
@@ -675,12 +631,12 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
     ... "know_name": "['代数', '集合', '集合的相等']"
     ... }]
     >>> tokenizer.set_vocab(items, key=lambda x: x['ques_content'], trim_min_count=1, silent=True)
-    >>> pretrain_quesnet('./data/quesnet_data.json', './testQuesNet', tokenizer) # doctest: +SKIP
+    >>> pretrain_quesnet('./data/standard_luna_data.json', './testQuesNet', tokenizer) # doctest: +SKIP
     """
     default_train_params = {
         # train params
         "n_epochs": 1,
-        "batch_size": 6,
+        "batch_size": 8,
         "lr": 1e-3,
         'save_every': 0,
         'log_steps': 10,
@@ -693,19 +649,25 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
     if train_params is not None:
         default_train_params.update(train_params)
     train_params = default_train_params
-
     os.makedirs(output_dir, exist_ok=True)
-
     device = torch.device(train_params['device'])
+    # set tokenizer
+    tokenizer = QuesNetTokenizer(meta=['know_name'],
+                                 img_dir=img_dir)
+    items = Lines(path, skip=1)
+
+    tokenizer.set_vocab(items, key=lambda x: x['ques_content'],
+                        trim_min_count=2, silent=False)
+    tokenizer.set_meta_vocab(items, silent=False)
+    tokenizer.save_pretrained(output_dir)
 
-    ques_dl = QuestionLoader(path, tokenizer)
-    model = QuesNet(_stoi=tokenizer.stoi, feat_size=train_params['feat_size'],
-                    emb_size=train_params['emb_size']).to(
-        device)
+    ques_dl = QuestionLoader(items, tokenizer)
+    model = QuesNetForPreTraining(_stoi=tokenizer.stoi, feat_size=train_params['feat_size'],
+                                  emb_size=train_params['emb_size']).to(device)
     emb_dict = tokenizer.stoi['word']
     emb_dict_rev = tokenizer.itos['word']
     emb_size = train_params['emb_size']
-    meta_size = model.meta_size
+    meta_size = model.quesnet.meta_size
     w2v_corpus = []
     img_corpus = []
     meta_corpus = []
@@ -723,9 +685,9 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
                 img_corpus.append(a)
         w2v_corpus.append(text_content)
         meta_vector = torch.zeros(meta_size, dtype=torch.float)
-        for m in qs.labels[model.meta]:
-            meta_vector.add_(
-                torch.nn.functional.one_hot(torch.tensor(m, dtype=torch.int64), model.meta_size).to(torch.float))
+        for m in qs.labels[model.quesnet.meta]:
+            meta_vector.add_(torch.nn.functional.one_hot(torch.tensor(m, dtype=torch.int64),
+                             model.quesnet.meta_size).to(torch.float))
         meta_corpus.append(meta_vector)
 
     # train word2vec for text embedding
@@ -739,27 +701,27 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
         w2v_index = gensim_w2v.wv.key_to_index[key]
         emb_weights.append(w2v_emb[w2v_index])
     emb_weights = np.array(emb_weights)
-    model.load_emb(emb_weights)
+    model.quesnet.load_emb(emb_weights)
     logger.info('quesnet Word Embedding loaded')
     if save_embs:
         np.save(os.path.join(output_dir, 'w2v_embs.npy'), emb_weights)
 
     # train auto-encoder loss for image embedding
     img_dataset = EmbeddingDataset(data=img_corpus, data_type='image')
-    trained_ie = pretrain_embedding_layer(dataset=img_dataset, ae=model.ie, lr=train_params['lr'],
+    trained_ie = pretrain_embedding_layer(dataset=img_dataset, ae=model.quesnet.ie, lr=train_params['lr'],
                                           log_step=train_params['log_steps'], batch_size=train_params['batch_size'],
                                           epochs=train_params['n_epochs'], device=device)
-    model.load_img(trained_ie)
+    model.quesnet.load_img(trained_ie)
     logger.info('quesnet Image Embedding loaded')
     if save_embs:
         torch.save(trained_ie.state_dict(), os.path.join(output_dir, 'trained_ie.pt'))
 
     # train auto-encoder loss for meta embedding
     meta_dateset = EmbeddingDataset(data=meta_corpus, data_type='meta')
-    trained_me = pretrain_embedding_layer(dataset=meta_dateset, ae=model.me, lr=train_params['lr'],
+    trained_me = pretrain_embedding_layer(dataset=meta_dateset, ae=model.quesnet.me, lr=train_params['lr'],
                                           log_step=train_params['log_steps'], batch_size=train_params['batch_size'],
                                           epochs=train_params['n_epochs'], device=device)
-    model.load_meta(trained_me)
+    model.quesnet.load_meta(trained_me)
     logger.info('quesnet Meta Embedding loaded')
     if save_embs:
         torch.save(trained_me.state_dict(), os.path.join(output_dir, 'trained_me.pt'))
@@ -767,7 +729,7 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
     logger.info("quesnet Word, Image and Meta Embeddings training is done")
 
     # HLM and DOO training
-    ques_dl.pipeline = partial(model.make_batch, device=device, pretrain=True)
+    ques_dl.pipeline = partial(model.quesnet.make_batch, device=device, pretrain=True)
     model.train()
     optim = optimizer(model, lr=train_params['lr'])
     n_batches = 0
@@ -777,19 +739,14 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
                         train_iter.pos)
         for i, batch in critical(bar):
             n_batches += 1
-            loss = model.pretrain_loss(batch)
-            if isinstance(loss, dict):
-                total_loss = 0.
-                for k, v in loss.items():
-                    if v is not None:
-                        total_loss += v
-                loss = total_loss
+            loss = model(batch).loss
             optim.zero_grad()
             loss.backward()
             optim.step()
 
             if train_params['save_every'] > 0 and i % train_params['save_every'] == 0:
-                model.save(os.path.join(output_dir, f'QuesNet_{epoch}.{i}'))
+                # model.save(os.path.join(output_dir, f'QuesNet_{epoch}.{i}'))
+                model.save_pretrained(output_dir)
 
             if train_params['log_steps'] > 0 and i % train_params['log_steps'] == 0:
                 logger.info(f"{epoch}.{i}---loss: {loss.item()}")
@@ -797,7 +754,7 @@ def pretrain_quesnet(path, output_dir, tokenizer, save_embs=False, train_params=
             if train_params['max_steps'] > 0 and n_batches % train_params['max_steps'] == 0:
                 break
 
-        model.save(os.path.join(output_dir, f'QuesNet_{epoch}'))
+        # model.save(os.path.join(output_dir, f'QuesNet_{epoch}'))
 
-    model.save(output_dir)
+    model.save_pretrained(output_dir)
     tokenizer.save_pretrained(output_dir)
diff --git a/EduNLP/SIF/constants.py b/EduNLP/SIF/constants.py
index f8b93912..781ce31d 100644
--- a/EduNLP/SIF/constants.py
+++ b/EduNLP/SIF/constants.py
@@ -12,6 +12,13 @@
 FORMULA_BEGIN = r"[FORMULA_BEGIN]"
 FORMULA_END = r"[FORMULA_END]"
 
+EDU_SPYMBOLS = [
+    TEXT_SYMBOL, FORMULA_SYMBOL, FIGURE_SYMBOL,
+    QUES_MARK_SYMBOL, TAG_SYMBOL, SEP_SYMBOL,
+    TEXT_BEGIN, TEXT_END,
+    FORMULA_BEGIN, FORMULA_END
+]
+
 
 class Symbol(str):
     pass
diff --git a/EduNLP/SIF/segment/segment.py b/EduNLP/SIF/segment/segment.py
index 4f059e61..3b3bf227 100644
--- a/EduNLP/SIF/segment/segment.py
+++ b/EduNLP/SIF/segment/segment.py
@@ -29,17 +29,17 @@ def base64_to_numpy(cls, figure: str):
 
 class FigureFormulaSegment(Figure):
     """Duel with figureformula, especially coding in base64"""
-    def __init__(self, src, is_base64=False, figure_instance: (dict, bool) = None):
+    def __init__(self, src, is_base64=False, figure_instances: dict = None):
         super(FigureFormulaSegment, self).__init__(is_base64)
         self.src = src
         if self.base64 is True:
             self.figure = self.src[len(r"\FormFigureBase64") + 1: -1]
-            if figure_instance is True or (isinstance(figure_instance, dict) and figure_instance.get("base64") is True):
+            if figure_instances is not None:
                 self.figure = self.base64_to_numpy(self.figure)
         else:
             self.figure = self.src[len(r"\FormFigureID") + 1: -1]
-            if isinstance(figure_instance, dict):
-                self.figure = figure_instance[self.figure]
+            if figure_instances is not None:
+                self.figure = figure_instances[self.figure]
 
     def __repr__(self):
         if self.base64 is True:
@@ -49,17 +49,17 @@ def __repr__(self):
 
 class FigureSegment(Figure):
     """Duel with figure, especially coding in base64"""
-    def __init__(self, src, is_base64=False, figure_instance: (dict, bool) = None):
+    def __init__(self, src, is_base64=False, figure_instances: dict = None):
         super(FigureSegment, self).__init__(is_base64)
         self.src = src
         if self.base64 is True:
             self.figure = self.src[len(r"\FigureBase64") + 1: -1]
-            if figure_instance is True or (isinstance(figure_instance, dict) and figure_instance.get("base64") is True):
+            if figure_instances is not None:
                 self.figure = self.base64_to_numpy(self.figure)
         else:
             self.figure = self.src[len(r"\FigureID") + 1: -1]
-            if isinstance(figure_instance, dict):
-                self.figure = figure_instance[self.figure]
+            if figure_instances is not None:
+                self.figure = figure_instances[self.figure]
 
     def __repr__(self):
         if self.base64 is True:
@@ -112,13 +112,13 @@ def __init__(self, item, figures: dict = None):
             if not re.match(r"\$.+?\$", segment):
                 self.append(TextSegment(segment))
             elif re.match(r"\$\\FormFigureID\{.+?}\$", segment):
-                self.append(FigureFormulaSegment(segment[1:-1], is_base64=False, figure_instance=figures))
+                self.append(FigureFormulaSegment(segment[1:-1], is_base64=False, figure_instances=figures))
             elif re.match(r"\$\\FormFigureBase64\{.+?}\$", segment):
-                self.append(FigureFormulaSegment(segment[1:-1], is_base64=True, figure_instance=figures))
+                self.append(FigureFormulaSegment(segment[1:-1], is_base64=True, figure_instances=figures))
             elif re.match(r"\$\\FigureID\{.+?}\$", segment):
-                self.append(FigureSegment(segment[1:-1], is_base64=False, figure_instance=figures))
+                self.append(FigureSegment(segment[1:-1], is_base64=False, figure_instances=figures))
             elif re.match(r"\$\\FigureBase64\{.+?}\$", segment):
-                self.append(FigureSegment(segment[1:-1], is_base64=True, figure_instance=figures))
+                self.append(FigureSegment(segment[1:-1], is_base64=True, figure_instances=figures))
             elif re.match(r"\$\\(SIFBlank|SIFChoice)\$", segment):
                 self.append(QuesMarkSegment(segment[1:-1]))
             elif re.match(r"\$\\SIFTag\{.+?}\$", segment):
diff --git a/EduNLP/SIF/sif.py b/EduNLP/SIF/sif.py
index 41518966..80a1e329 100644
--- a/EduNLP/SIF/sif.py
+++ b/EduNLP/SIF/sif.py
@@ -141,8 +141,9 @@ def sif4sci(item: str, figures: (dict, bool) = None, mode: int = 2, symbol: str
             More parameters can be found in the definition in SIF.tokenization.formula
         For figure_params:
             figure_instance：whether to return instance of figures in tokens
-        For text_params:
-            See definition in SIF.tokenization.text
+        For text_params: See definition in SIF.tokenization.text
+            granularity: word or char
+            stopwords: default or None or list
 
     errors:
         warn,
diff --git a/EduNLP/SIF/tokenization/formula/ast_token.py b/EduNLP/SIF/tokenization/formula/ast_token.py
index 22a2af23..3a394a6f 100644
--- a/EduNLP/SIF/tokenization/formula/ast_token.py
+++ b/EduNLP/SIF/tokenization/formula/ast_token.py
@@ -48,7 +48,7 @@ def traversal_formula(ast, ord2token=False, var_numbering=False, strategy="post"
         raise ValueError("Unknown traversal strategy: %s" % strategy)
     for i in order:
         node = ast.nodes[i]
-        if node["type"] == "ignore":
+        if node.get("type", "ignore") == "ignore":
             continue
         if ord2token is True and node["type"] in ["mathord", "textord", "text"]:
             if var_numbering is True and node["type"] == "mathord":
diff --git a/EduNLP/SIF/tokenization/text/tokenization.py b/EduNLP/SIF/tokenization/text/tokenization.py
index 2e063f85..45bd96a6 100644
--- a/EduNLP/SIF/tokenization/text/tokenization.py
+++ b/EduNLP/SIF/tokenization/text/tokenization.py
@@ -7,6 +7,14 @@
 jieba.setLogLevel(logging.INFO)
 
 
+def is_chinese(word):
+    """判断一个char或者string是否是汉字(串)"""
+    for char in word:
+        if char < u'\u4e00' or char > u'\u9fa5':
+            return False
+    return True
+
+
 def tokenize(text, granularity="word", stopwords="default"):
     """
     Using jieba library to tokenize item by word or char.
@@ -25,14 +33,21 @@ def tokenize(text, granularity="word", stopwords="default"):
     >>> tokenize("三角函数是基本初等函数之一")
     ['三角函数', '初等', '函数']
     >>> tokenize("三角函数是基本初等函数之一", granularity="char")
-    ['三', '角', '函', '数', '基', '初', '函', '数']
+    ['三', '角', '函', '数', '初', '等', '函', '数']
     """
     stopwords = DEFAULT_STOPWORDS if stopwords == "default" else stopwords
     stopwords = stopwords if stopwords is not None else {}
     if granularity == "word":
         return [token for token in jieba.cut(text) if token not in stopwords and token.strip()]
     elif granularity == "char":
-        stopwords = stopwords if stopwords is not None else {}
-        return [token for token in text if token not in stopwords and token.strip()]
+        jieba_tokens = [token for token in jieba.cut(text) if token not in stopwords and token.strip()]
+        # Use jieba_tokens to hangle sentence with mixed chinese and english.
+        split_tokens = []
+        for token in jieba_tokens:
+            if is_chinese(token):
+                split_tokens.extend(list(token))
+            else:
+                split_tokens.append(token)
+        return split_tokens
     else:
         raise TypeError("Unknown granularity %s" % granularity)
diff --git a/EduNLP/SIF/tokenization/tokenization.py b/EduNLP/SIF/tokenization/tokenization.py
index 19aa5f92..e9cc9bf8 100644
--- a/EduNLP/SIF/tokenization/tokenization.py
+++ b/EduNLP/SIF/tokenization/tokenization.py
@@ -3,6 +3,7 @@
 
 from contextlib import contextmanager
 from copy import deepcopy
+from typing import Union
 from EduNLP.Formula import link_formulas as _link_formulas, Formula
 from ..constants import (
     Symbol, TEXT_SYMBOL, FIGURE_SYMBOL, FORMULA_SYMBOL, QUES_MARK_SYMBOL, TAG_SYMBOL, SEP_SYMBOL,
@@ -45,13 +46,8 @@ def __init__(self, segment_list: SegmentList, text_params=None, formula_params=N
         self.text_params = text_params if text_params is not None else {}
 
         self.formula_params = deepcopy(formula_params) if formula_params is not None else {"method": "linear"}
-
-        self.symbolize_figure_formula = False
-        self.skip_figure_formula = False
-        if "symbolize_figure_formula" in self.formula_params:
-            self.symbolize_figure_formula = self.formula_params.pop("symbolize_figure_formula")
-        if "skip_figure_formula" in self.formula_params:
-            self.skip_figure_formula = self.formula_params.pop("skip_figure_formula")
+        self.symbolize_figure_formula = self.formula_params.pop("symbolize_figure_formula", False)
+        self.skip_figure_formula = self.formula_params.pop("skip_figure_formula", False)
         self.formula_tokenize_method = self.formula_params.get("method")
 
         self.figure_params = figure_params if figure_params is not None else {}
@@ -322,7 +318,8 @@ def __add_token(self, token, tokens):
         """classify token to tokens"""
         if isinstance(token, Formula):
             if self.formula_params.get("return_type") == "list":
-                tokens.extend(formula.traversal_formula(token.ast_graph, **self.formula_params))
+                ret = formula.traversal_formula(token.ast_graph, **self.formula_params)
+                tokens.extend([i for i in ret if i is not None])
             elif self.formula_params.get("return_type") == "ast":
                 tokens.append(token.ast_graph)
             else:
@@ -365,7 +362,7 @@ def inner_formula_tokens(self):
         return [self._tokens[i] for i in self._formula_tokens]
 
     @contextmanager
-    def filter(self, drop: (set, str) = "", keep: (set, str) = "*"):
+    def filter(self, drop: Union[set, str] = "", keep: Union[set, str] = "*"):
         """
         Output special element list selective.Drop means not show.Keep means show.
 
diff --git a/EduNLP/Tokenizer/tokenizer.py b/EduNLP/Tokenizer/tokenizer.py
index 9376b549..56e3b28d 100644
--- a/EduNLP/Tokenizer/tokenizer.py
+++ b/EduNLP/Tokenizer/tokenizer.py
@@ -1,119 +1,251 @@
 # coding: utf-8
 # 2021/8/1 @ tongshiwei
 
-from typing import Iterable
+from pickle import NONE
+from typing import Iterable, Union
 from ..SIF.segment import seg
 from ..SIF.tokenization import tokenize
+from ..SIF.tokenization.text import tokenize as tokenize_text
+from ..SIF import sif4sci
 
-__all__ = ["TOKENIZER", "Tokenizer", "PureTextTokenizer", "TextTokenizer", "get_tokenizer"]
+
+__all__ = ["TOKENIZER", "Tokenizer", "CustomTokenizer", "CharTokenizer", "SpaceTokenizer",
+           "PureTextTokenizer", "AstFormulaTokenizer", "get_tokenizer"]
 
 
 class Tokenizer(object):
+    """Iterator genetator for tokenization"""
     def __call__(self, *args, **kwargs):
         raise NotImplementedError
 
+    def _tokenize(self, *args, **kwargs):
+        raise NotImplementedError
 
-class PureTextTokenizer(Tokenizer):
-    r"""
-    Duel with text and plain text formula.
-    And filting special formula like $\\FormFigureID{…}$ and $\\FormFigureBase64{…}.
+
+class CustomTokenizer(Tokenizer):
+    def __init__(self, symbol="gmas", figures=None, **kwargs):
+        """Tokenize SIF items by customized configuration
+
+        Parameters
+        ----------
+        symbol : str, optional
+            Elements to symbolize before tokenization, by default "gmas"
+        figures : _type_, optional
+            Info for figures in items, by default None
+        kwargs: addtional configuration for SIF items
+            including text_params, formula_params, figure_params, more details could be found in `EduNLP.SIF.sif4sci`
+        """
+        self.tokenization_params = {
+            "text_params": kwargs.get("text_params", None),
+            "formula_params": kwargs.get("formula_params", None),
+            "figure_params": kwargs.get("figure_params", None)
+        }
+        self.symbol = symbol
+        self.figures = figures
+
+    def __call__(self, items: Iterable, key=lambda x: x, **kwargs):
+        """Tokenize items, return iterator genetator
+
+        Parameters
+        ----------
+        item : Iterable
+            question items
+        key : function, optional
+            determine how to get the text of items, by default lambdax: x
+        """
+        for item in items:
+            yield self._tokenize(item, key=key, **kwargs)
+
+    def _tokenize(self, item: Union[str, dict], key=lambda x: x, **kwargs):
+        """Tokenize one item, return token list
+
+        Parameters
+        ----------
+        item : Union[str, dict]
+            question item
+        key : function, optional
+            determine how to get the text of item, by default lambdax: x
+        """
+        return tokenize(seg(key(item), symbol=self.symbol, figures=self.figures),
+                        **self.tokenization_params, **kwargs).tokens
+
+
+class CharTokenizer(Tokenizer):
+    def __init__(self, stop_words="punctuations", **kwargs) -> None:
+        """Tokenize text char by char. eg. "题目内容" -> ["题",  "目",  "内", 容"]
+
+        Parameters
+        ----------
+        stop_words : str, optional
+            stop_words to skip, by default "default"
+        """
+        self.stop_words = set("\n\r\t .,;?\"\'。．，、；？“”‘’（）") if stop_words == "punctuations" else stop_words
+        self.stop_words = stop_words if stop_words is not None else set()
+
+    def __call__(self, items: Iterable, key=lambda x: x, **kwargs):
+        for item in items:
+            yield self._tokenize(item, key=key, **kwargs)
+
+    def _tokenize(self, item: Union[str, dict], key=lambda x: x, **kwargs):
+        tokens = tokenize_text(key(item).strip(), granularity="char", stopwords=self.stop_words)
+        return tokens
+
+
+class SpaceTokenizer(Tokenizer):
+    """Tokenize text by space. eg. "题目 内容" -> ["题目", "内容"]
 
     Parameters
     ----------
-    items: str
-    key
-    args
-    kwargs
+    stop_words : str, optional
+        stop_words to skip, by default "default"
+    """
+    def __init__(self, stop_words="punctuations", **kwargs) -> None:
+        stop_words = set("\n\r\t .,;?\"\'。．，、；？“”‘’（）") if stop_words == "punctuations" else stop_words
+        self.stop_words = stop_words if stop_words is not None else set()
 
-    Returns
-    -------
-    token
+    def __call__(self, items: Iterable, key=lambda x: x, **kwargs):
+        for item in items:
+            yield self._tokenize(item, key=key, **kwargs)
 
-    Examples
-    --------
-    >>> tokenizer = PureTextTokenizer()
-    >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,\
-    ... 若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)[:10]
-    ['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z']
-    >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
-    >>> items = [{
-    ... "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
-    ... "options": ["1", "2"]
-    ... }]
-    >>> tokens = tokenizer(items, key=lambda x: x["stem"])
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
-    """
+    def _tokenize(self, item: Union[str, dict], key=lambda x: x, **kwargs):
+        tokens = key(item).strip().split(' ')
+        if self.stop_words:
+            tokens = [w for w in tokens if w != '' and w not in self.stop_words]
+        return tokens
 
-    def __init__(self, *args, **kwargs):
+
+class PureTextTokenizer(Tokenizer):
+    def __init__(self, handle_figure_formula="skip", **kwargs):
+        """
+        Treat all elements in SIF item as prue text. Spectially, tokenize formulas as text.
+
+        Parameters
+        ----------
+        handle_figure_formula : str, optional
+            whether to skip or symbolize special formulas( $\\FormFigureID{…}$ and $\\FormFigureBase64{…}),
+            by default skip
+
+        Examples
+        --------
+        >>> tokenizer = PureTextTokenizer()
+        >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,\
+        ... 若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
+        >>> tokens = tokenizer(items)
+        >>> next(tokens)[:10]
+        ['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z']
+        >>> items=["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
+        >>> tokens = tokenizer(items)
+        >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
+        ['已知', '集合', 'A', '=', '\\\\left', '\\\\{', 'x', '\\\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', ...]
+        >>> items = [{
+        ... "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+        ... "options": ["1", "2"]
+        ... }]
+        >>> tokens = tokenizer(items, key=lambda x: x["stem"])
+        >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
+        ['已知', '集合', 'A', '=', '\\\\left', '\\\\{', 'x', '\\\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', ...]
+        >>> tokenizer = PureTextTokenizer(symbolize_figure_formula=True)
+        >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,\
+        ... 若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
+        >>> tokens = tokenizer(items)
+        >>> next(tokens)[:10]
+        ['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z']
+        >>> items = ["$\\SIFTag{stem_begin}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem_end}$\
+        ... $\\SIFTag{options_begin}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$\
+        ... $\\SIFTag{list_3}$2$\\SIFTag{options_end}$"]
+        >>> tokens = tokenizer(items)
+        >>> next(tokens)[:10]
+        ['[TAG]', '复数', 'z', '=', '1', '+', '2', 'i', '+', 'i']
+        """
+        # Formula images are skipped by default
+        if handle_figure_formula == "skip":
+            skip_figure_formula = True
+            symbolize_figure_formula = False
+        elif handle_figure_formula == "symbolize":
+            skip_figure_formula = False
+            symbolize_figure_formula = True
+        elif handle_figure_formula is None:
+            skip_figure_formula, symbolize_figure_formula = False, False
+        else:
+            raise ValueError('handle_figure_formula should be one in ["skip", "symbolize", None]')
+        formula_params = {
+            "method": "linear",
+            "skip_figure_formula": skip_figure_formula,
+            "symbolize_figure_formula": symbolize_figure_formula
+        }
+        text_params = {
+            "granularity": "word",
+            "stopwords": "default",
+        }
+        formula_params.update(kwargs.pop("formula_params", {}))
+        text_params.update(kwargs.pop("text_params", {}))
         self.tokenization_params = {
-            "formula_params": {
-                "method": "linear",
-                "skip_figure_formula": True
-            }
+            "formula_params": formula_params,
+            "text_params": text_params,
+            "figure_params": kwargs.get("figure_params", None)
         }
 
-    def __call__(self, items: Iterable, key=lambda x: x, *args, **kwargs):
+    def __call__(self, items: Iterable, key=lambda x: x, **kwargs):
         for item in items:
-            yield tokenize(seg(key(item), symbol="gmas"), **self.tokenization_params).tokens
+            yield self._tokenize(item, key=key, **kwargs)
 
+    def _tokenize(self, item: Union[str, dict], key=lambda x: x, **kwargs):
+        return tokenize(seg(key(item), symbol="gmas"), **self.tokenization_params, **kwargs).tokens
 
-class TextTokenizer(Tokenizer):
-    r"""
-    Duel with text and formula including special formula.
 
-    Parameters
-    ----------
-    items: str
-    key
-    args
-    kwargs
+class AstFormulaTokenizer(Tokenizer):
+    def __init__(self, symbol="gmas", figures=None, **kwargs):
+        """Tokenize formulas in SIF items by AST parser.
 
-    Returns
-    -------
-    token
+        Parameters
+        ----------
+        symbol : str, optional
+            Elements to symbolize before tokenization, by default "gmas"
+        figures : _type_, optional
+            Info for figures in items, by default None
+        """
+        formula_params = {
+            "method": "ast",
 
-    Examples
-    ----------
-    >>> tokenizer = TextTokenizer()
-    >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,\
-    ... 若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)[:10]
-    ['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]']
-    >>> items = ["$\\SIFTag{stem_begin}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem_end}$\
-    ... $\\SIFTag{options_begin}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$\
-    ... $\\SIFTag{list_3}$2$\\SIFTag{options_end}$"]
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)[:10]
-    ['[TAG]', '复数', 'z', '=', '1', '+', '2', 'i', '+', 'i']
-    """
+            "ord2token": True,
+            "return_type": "list",
+            "var_numbering": True,
 
-    def __init__(self, *args, **kwargs):
+            "skip_figure_formula": False,
+            "symbolize_figure_formula": True
+        }
+        text_params = {
+            "granularity": "word",
+            "stopwords": "default",
+        }
+        formula_params.update(kwargs.pop("formula_params", {}))
+        text_params.update(kwargs.pop("text_params", {}))
         self.tokenization_params = {
-            "formula_params": {
-                "method": "linear",
-                "symbolize_figure_formula": True
-            }
+            "formula_params": formula_params,
+            "text_params": text_params,
+            "figure_params": kwargs.pop("figure_params", None),
         }
+        self.symbol = symbol
+        self.figures = figures
 
-    def __call__(self, items: Iterable, key=lambda x: x, *args, **kwargs):
+    def __call__(self, items: Iterable, key=lambda x: x, **kwargs):
         for item in items:
-            yield tokenize(seg(key(item), symbol="gmas"), **self.tokenization_params).tokens
+            yield self._tokenize(item, key=key, **kwargs)
+
+    def _tokenize(self, item: Union[str, dict], key=lambda x: x, **kwargs):
+        mode = kwargs.pop("mode", 0)
+        ret = sif4sci(key(item), figures=self.figures, symbol=self.symbol, mode=mode,
+                      tokenization_params=self.tokenization_params, errors="ignore", **kwargs)
+        ret = [] if ret is None else ret.tokens
+        return ret
 
 
 TOKENIZER = {
+    "char": CharTokenizer,
+    "space": SpaceTokenizer,
+    "custom": CustomTokenizer,
     "pure_text": PureTextTokenizer,
-    "text": TextTokenizer
+    "ast_formula": AstFormulaTokenizer
 }
 
 
@@ -134,7 +266,7 @@ def get_tokenizer(name, *args, **kwargs):
     Examples
     --------
     >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-    >>> tokenizer = get_tokenizer("text")
+    >>> tokenizer = get_tokenizer("pure_text")
     >>> tokens = tokenizer(items)
     >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
     ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
diff --git a/EduNLP/Vector/bert_vec.py b/EduNLP/Vector/bert_vec.py
index 39f4f8df..33fc0061 100644
--- a/EduNLP/Vector/bert_vec.py
+++ b/EduNLP/Vector/bert_vec.py
@@ -1,5 +1,4 @@
-import numpy as np
-from pathlib import PurePath
+# from transformers import BertModel as HFBertModel
 from transformers import AutoModel
 from .const import UNK, PAD
 from .meta import Vector
diff --git a/EduNLP/Vector/disenqnet/disenqnet.py b/EduNLP/Vector/disenqnet/disenqnet.py
index 18a0753c..edff4412 100644
--- a/EduNLP/Vector/disenqnet/disenqnet.py
+++ b/EduNLP/Vector/disenqnet/disenqnet.py
@@ -1,7 +1,3 @@
-import imp
-from pickle import NONE
-import numpy as np
-from pathlib import PurePath
 import torch
 from EduNLP.ModelZoo.disenqnet.disenqnet import DisenQNet
 
@@ -21,8 +17,8 @@ def __init__(self, pretrained_dir, device="cpu"):
         self.model.to(self.device)
 
     def __call__(self, items: dict, **kwargs):
-        embed, k_hidden, i_hidden = self.model.inference(items)
-        return embed, k_hidden, i_hidden
+        outputs = self.model(**items)
+        return outputs.embeded, outputs.k_hidden, outputs.i_hidden
 
     def infer_vector(self, items: dict, vector_type=None, **kwargs) -> torch.Tensor:
         """
@@ -45,9 +41,9 @@ def infer_vector(self, items: dict, vector_type=None, **kwargs) -> torch.Tensor:
             raise KeyError("vector_type must be one of (None, 'k', 'i') ")
 
     def infer_tokens(self, items: dict, **kwargs) -> torch.Tensor:
-        embed, _, _ = self(items)
-        return embed
+        embeded, _, _ = self(items)
+        return embeded
 
     @property
     def vector_size(self):
-        return self.model.hidden_dim
+        return self.model.hidden_size
diff --git a/EduNLP/Vector/elmo_vec.py b/EduNLP/Vector/elmo_vec.py
index 3913df07..84146534 100644
--- a/EduNLP/Vector/elmo_vec.py
+++ b/EduNLP/Vector/elmo_vec.py
@@ -11,55 +11,48 @@
 from EduNLP.ModelZoo.rnn import ElmoLM
 from .meta import Vector
 import json
+from typing import Dict, List, Tuple
 
 
 class ElmoModel(Vector):
-    def __init__(self, pretrained_model_path: str):
+    def __init__(self, pretrained_dir: str):
         """
         Parameters
         ----------
         pretrained_model_path: str
         """
         super(ElmoModel, self).__init__()
-        with open(os.path.join(pretrained_model_path, 'config.json'), 'r') as f:
-            config = json.load(f)
-        self.model = ElmoLM(vocab_size=config['vocab_size'], embedding_dim=config['emb_dim'],
-                            hidden_size=config['hid_dim'])
-        self.model.load_state_dict(torch.load(os.path.join(pretrained_model_path, 'weight.pt')))
+        self.model = ElmoLM.from_pretrained(pretrained_dir)
         self.model.eval()
 
     def __call__(self, *args, **kwargs):
         return self.infer_vector(*args, **kwargs)
 
-    def infer_vector(self, items, *args, **kwargs) -> torch.Tensor:
-        is_batch = isinstance(items[0], list)
-        items = items if is_batch else [items]
-        lengths = kwargs.get('lengths', [len(i) for i in items])
-        pred_forward, pred_backward, forward_hiddens, backward_hiddens = self.model(torch.tensor(items),
-                                                                                    torch.tensor(lengths,
-                                                                                                 dtype=torch.int64))
-        ret = torch.cat(
-            (forward_hiddens[torch.arange(len(lengths)), torch.tensor(lengths) - 1],
-             backward_hiddens[torch.arange(len(lengths)), max(lengths) - torch.tensor(lengths)]),
-            dim=-1) if is_batch else torch.cat(
-            (forward_hiddens[0, -1, :], backward_hiddens[0, 0, :]), dim=-1)
-        return ret
+    def infer_vector(self, items: Tuple[dict, List[dict]], *args, **kwargs) -> torch.Tensor:
+        # TODO: handle batch and unbatch format for inputs and outputs
+        # is_batch = isinstance(items, list)
+        # items = items if is_batch else [items]
+        outputs = self.model(**items)
+        item_embeds = torch.cat(
+            (outputs.forward_output[torch.arange(len(items["seq_len"])), torch.tensor(items["seq_len"]) - 1],
+             outputs.backward_output[torch.arange(len(items["seq_len"])), 0]),
+            dim=-1)
+        return item_embeds
 
     def infer_tokens(self, items, *args, **kwargs) -> torch.Tensor:
-        is_batch = isinstance(items[0], list)
-        items = items if is_batch else [items]
-        lengths = kwargs.get('lengths', [len(i) for i in items])
-        pred_forward, pred_backward, forward_hiddens, backward_hiddens = self.model(torch.tensor(items),
-                                                                                    torch.tensor(lengths,
-                                                                                                 dtype=torch.int64))
-        if is_batch:
-            ret = []
-            for fh, bh, lg in zip(forward_hiddens, backward_hiddens, lengths):
-                _bh = torch.cat((torch.flip(bh[:lg], [0]), bh[lg:]), dim=0)
-                ret.append(torch.cat((fh, _bh), dim=-1))
-            return torch.stack(tuple(ret))
-        else:
-            return torch.cat((forward_hiddens[0], torch.flip(backward_hiddens, [1])[0]), dim=-1)
+        # is_batch = isinstance(items, list)
+        outputs = self.model(**items)
+        forward_hiddens = outputs.forward_output
+        backward_hiddens = outputs.backward_output
+        return torch.cat((forward_hiddens, backward_hiddens), dim=-1)
+        # if is_batch:
+        #     ret = []
+        #     for fh, bh, lg in zip(forward_hiddens, backward_hiddens, items.seq_len):
+        #         _bh = torch.cat((torch.flip(bh[:lg], [0]), bh[lg:]), dim=0)
+        #         ret.append(torch.cat((fh, _bh), dim=-1))
+        #     return torch.stack(tuple(ret))
+        # else:
+        #     return torch.cat((forward_hiddens[0], torch.flip(backward_hiddens, [1])[0]), dim=-1)
 
     @property
     def vector_size(self):
diff --git a/EduNLP/Vector/quesnet/quesnet.py b/EduNLP/Vector/quesnet/quesnet.py
index 9335d311..cd845461 100644
--- a/EduNLP/Vector/quesnet/quesnet.py
+++ b/EduNLP/Vector/quesnet/quesnet.py
@@ -5,7 +5,7 @@
 
 
 class QuesNetModel(object):
-    def __init__(self, pretrained_dir, tokenizer=None, device="cpu"):
+    def __init__(self, pretrained_dir, img_dir=None, device="cpu", **kwargs):
         """
         Parameters
         ----------
@@ -13,42 +13,50 @@ def __init__(self, pretrained_dir, tokenizer=None, device="cpu"):
             the dirname to pretrained model
         device: str
             cpu or cuda, default is cpu
-        tokenizer: QuesNetTokenizer
-            quesnet  tokenzier
+        img_dir: str
+            image dir
         """
         self.device = torch.device(device)
-        if tokenizer is None:
-            tokenizer = QuesNetTokenizer.from_pretrained(pretrained_dir)
-        self.model = QuesNet.from_pretrained(pretrained_dir, tokenizer).to(device)
+        self.model = QuesNet.from_pretrained(pretrained_dir, img_dir=img_dir).to(device)
+        self.model.eval()
 
-    def infer_vector(self, items: Union[Question, list]) -> torch.Tensor:
+    def __call__(self, items: dict, **kwargs):
         """ get question embedding with quesnet
 
         Parameters
         ----------
-        items : (Question, list)
-            namedtuple, ['id', 'content', 'answer', 'false_options', 'labels']
-            or a list of Questions
+        items:
+            encodes from tokenizer
         """
-        inputs = [items] if isinstance(items, Question) else items
-        vector = self.model(self.model.make_batch(inputs, device=self.device))[1]
-        return vector
+        qs = [Question("", items['seq_idx'][i],
+                       [0], [[0], [0], [0]], items['meta_idx'][i]) for i in range(len(items['seq_idx']))]
+        outputs = self.model(self.model.make_batch(qs, device=self.device))
+        return outputs.hidden, outputs.embeded
 
-    def infer_tokens(self, items: Union[Question, list]) -> torch.Tensor:
+    def infer_vector(self, items: Union[dict, list]) -> torch.Tensor:
+        """ get question embedding with quesnet
+
+        Parameters
+        ----------
+        items:
+            encodes from tokenizer
+        """
+        return self(items)[0]
+
+    def infer_tokens(self, items: Union[dict, list]) -> torch.Tensor:
         """ get token embeddings with quesnet
 
         Parameters
         ----------
-        items : Question
-            namedtuple, ['id', 'content', 'answer', 'false_options', 'labels']
-            or a list of Questions
+        items:
+            encodes from tokenizer
         Returns
         -------
         torch.Tensor
-            meta_emb + word_embs
+            word_embs + meta_emb
         """
-        inputs = [items] if isinstance(items, Question) else items
-        vector = self.model(self.model.make_batch(inputs, device=self.device))[2]
+        vector = self(items)[1]
+        """ Please note that output vector is like 0 0 seq_idx(text with image) 0 meta_idx 0 0"""
         return vector[:, 2:-2, :]
 
     @property
diff --git a/EduNLP/Vector/t2v.py b/EduNLP/Vector/t2v.py
index 0b3badab..1635eb4b 100644
--- a/EduNLP/Vector/t2v.py
+++ b/EduNLP/Vector/t2v.py
@@ -47,9 +47,13 @@ class T2V(object):
     --------
     >>> item = [{'ques_content':'有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
     ... 如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}]
-    >>> path = "examples/test_model/d2v/d2v_test_256/d2v_test_256.bin"
+    >>> model_dir = "examples/test_model/d2v"
+    >>> url, model_name, *args = get_pretrained_model_info('d2v_test_256')
+    >>> (); path = get_data(url, model_dir); () # doctest: +ELLIPSIS
+    (...)
+    >>> path = path_append(path, os.path.basename(path) + '.bin', to_str=True)
     >>> t2v = T2V('d2v',filepath=path)
-    >>> print(t2v(item)) # doctest: +ELLIPSIS
+    >>> print(t2v(item))
     [array([...dtype=float32)]
     """
 
@@ -92,7 +96,7 @@ def get_all_pretrained_models():
     return r['name']
 
 
-def get_pretrained_t2v(name, model_dir=MODEL_DIR):
+def get_pretrained_t2v(name, model_dir=MODEL_DIR, **kwargs):
     """
     It is a good idea if you want to switch token list to vector earily.
 
@@ -119,8 +123,8 @@ def get_pretrained_t2v(name, model_dir=MODEL_DIR):
     --------
     >>> item = [{'ques_content':'有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
     ... 如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}]
-    >>> i2v = get_pretrained_t2v("d2v_test_256", "examples/test_model/d2v") # doctest: +ELLIPSIS
-    >>> print(i2v(item)) # doctest: +ELLIPSIS
+    >>> i2v = get_pretrained_t2v("d2v_test_256", "examples/test_model/d2v") # doctest: +SKIP
+    >>> print(i2v(item)) # doctest: +SKIP
     [array([...dtype=float32)]
     """
     pretrained_models = get_all_pretrained_models()
@@ -134,4 +138,4 @@ def get_pretrained_t2v(name, model_dir=MODEL_DIR):
     if model_name in ["d2v", "w2v"]:
         postfix = ".bin" if model_name == "d2v" else ".kv"
         model_path = path_append(model_path, os.path.basename(model_path) + postfix, to_str=True)
-    return T2V(model_name, model_path, *args)
+    return T2V(model_name, model_path, *args, **kwargs)
diff --git a/EduNLP/utils/log.py b/EduNLP/utils/log.py
index 56774cb1..292f73d2 100644
--- a/EduNLP/utils/log.py
+++ b/EduNLP/utils/log.py
@@ -8,7 +8,7 @@ def get_logger():
     _logger.setLevel(logging.INFO)
     _logger.propagate = False
     ch = logging.StreamHandler()
-    ch.setFormatter(logging.Formatter('%(name)s, %(levelname)s %(message)s'))
+    ch.setFormatter(logging.Formatter('[%(name)s, %(levelname)s] %(message)s'))
     ch.setLevel(logging.INFO)
     _logger.addHandler(ch)
     return _logger
diff --git a/docs/source/api/ModelZoo.rst b/docs/source/api/ModelZoo.rst
index 1942f011..1b8ec9e4 100644
--- a/docs/source/api/ModelZoo.rst
+++ b/docs/source/api/ModelZoo.rst
@@ -1,6 +1,12 @@
 EduNLP.ModelZoo
 ==================
 
+base_model
+-----------
+
+.. automodule:: EduNLP.ModelZoo.base_model
+   :members:
+
 rnn
 -----------
 
@@ -18,7 +24,7 @@ disenqnet
 quesnet
 -----------
 
-.. automodule:: EduNLP.ModelZoo.quesnet.quesnet
+.. automodule:: EduNLP.ModelZoo.quesnet
    :members:
    :imported-members:
 
diff --git a/docs/source/api/i2v.rst b/docs/source/api/i2v.rst
index d8306edb..c0fbfaa8 100644
--- a/docs/source/api/i2v.rst
+++ b/docs/source/api/i2v.rst
@@ -3,4 +3,3 @@ EduNLP.I2V
 
 .. automodule:: EduNLP.I2V.i2v
    :members:
-   :imported-members:
diff --git a/docs/source/api/index.rst b/docs/source/api/index.rst
index 30a14fc2..05d989e3 100644
--- a/docs/source/api/index.rst
+++ b/docs/source/api/index.rst
@@ -41,3 +41,11 @@ Vector
 .. automodule:: EduNLP.Vector
    :members:
    :imported-members:
+
+
+Pipeline
+---------------
+
+.. automodule:: EduNLP.Pipeline
+   :members:
+   :imported-members:
diff --git a/docs/source/api/pipeline.rst b/docs/source/api/pipeline.rst
new file mode 100644
index 00000000..c5bf38fa
--- /dev/null
+++ b/docs/source/api/pipeline.rst
@@ -0,0 +1,28 @@
+EduNLP.Pipeline
+==================
+
+Pipeline
+----------------------------------------------------------
+
+.. automodule:: EduNLP.Pipeline.base
+   :members:
+
+
+Components
+----------------------------------------------------------
+
+.. automodule:: EduNLP.Pipeline.components
+   :members:
+
+
+Property prediction
+----------------------------------------------------------
+
+.. automodule:: EduNLP.Pipeline.property_prediction
+   :members:
+
+Knowledge prediction
+----------------------------------------------------------
+
+.. automodule:: EduNLP.Pipeline.knowledge_prediction
+   :members:
diff --git a/docs/source/api/pretrain.rst b/docs/source/api/pretrain.rst
index d0545b3f..378f1a93 100644
--- a/docs/source/api/pretrain.rst
+++ b/docs/source/api/pretrain.rst
@@ -1,32 +1,45 @@
 EduNLP.Pretrain
 ==================
 
+EduNLP.Pretrain.pretrian_utils
+---------------------------------------------------------------
+.. automodule:: EduNLP.Pretrain.pretrian_utils
+   :members:
+
+
+EduNLP.Pretrain.hugginface_utils
+---------------------------------------------------------------
+
+.. automodule:: EduNLP.Pretrain.hugginface_utils
+   :members:
+
+
 EduNLP.Pretrain.gensim_vec
-----------------------------------------
+---------------------------------------------------------------
 
 .. automodule:: EduNLP.Pretrain.gensim_vec
    :members:
 
 EduNLP.Pretrain.elmo_vec
-----------------------------------------
+---------------------------------------------------------------
 
 .. automodule:: EduNLP.Pretrain.elmo_vec
    :members:
 
 EduNLP.Pretrain.bert_vec
-----------------------------------------
+---------------------------------------------------------------
 
 .. automodule:: EduNLP.Pretrain.bert_vec
    :members:
 
 EduNLP.Pretrain.disenqnet_vec
-----------------------------------------
+---------------------------------------------------------------
 
 .. automodule:: EduNLP.Pretrain.disenqnet_vec
    :members:
 
 EduNLP.Pretrain.quesnet_vec
-----------------------------------------
+---------------------------------------------------------------
 
 .. automodule:: EduNLP.Pretrain.quesnet_vec
    :members:
\ No newline at end of file
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 9fd3e21d..de5bfe16 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -113,3 +113,4 @@ def copy_tree(src, tar):
     'member-order': 'bysource',
     'undoc-members': True,
 }
+autodoc_member_order = 'bysource'
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 301e674a..4cab1b68 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -148,6 +148,7 @@ If this repository is helpful for you, please cite our work
    tutorial/en/tokenization
    tutorial/en/pretrain
    tutorial/en/vectorization
+   tutorial/en/pipeline
 
 .. toctree::
    :maxdepth: 1
@@ -161,6 +162,7 @@ If this repository is helpful for you, please cite our work
    tutorial/zh/tokenization
    tutorial/zh/pretrain
    tutorial/zh/vectorization
+   tutorial/zh/pipeline
 
 
 .. toctree::
@@ -169,12 +171,13 @@ If this repository is helpful for you, please cite our work
    :hidden:
    :glob:
 
-   api/sif
    api/utils
+   api/sif
    api/formula
    api/tokenizer
-   api/pretrain
    api/ModelZoo
-   api/i2v
+   api/pretrain
    api/vector
-   
+   api/i2v
+   api/pipeline
+
diff --git a/docs/source/tutorial/en/index.rst b/docs/source/tutorial/en/index.rst
index 6e89d0ff..db06c30b 100644
--- a/docs/source/tutorial/en/index.rst
+++ b/docs/source/tutorial/en/index.rst
@@ -13,6 +13,8 @@ Get Started
 
 *  `Vectorization <vectorization.rst>`_
 
+*  `Pipeline <pipeline.rst>`_
+
 Main process
 ---------------
 
@@ -37,15 +39,11 @@ To help you quickly understand the functions of this project, this section only
 
 .. nbgallery::
     :caption: This is a thumbnail gallery:
-    :name: tokenization_gallery
+    :name: start_galler
     :glob:
     
     Tokenization  <../../build/blitz/sif/sif4sci.ipynb>
 
-
-.. nbgallery::
-    :caption: This is a thumbnail gallery:
-    :name: vectorization_gallery
-    :glob:
-    
     Vectorization  <../../build/blitz/i2v/get_pretrained_i2v.ipynb>
+
+    Pipeline <../../build/blitz/pipeline/pipeline.ipynb>
diff --git a/docs/source/tutorial/en/pipeline.rst b/docs/source/tutorial/en/pipeline.rst
new file mode 100644
index 00000000..d38f5b4c
--- /dev/null
+++ b/docs/source/tutorial/en/pipeline.rst
@@ -0,0 +1,10 @@
+=======
+Pipleine
+=======
+
+.. nbgallery::
+    :caption: This is a thumbnail gallery:
+    :name: pipleine_gallery
+    :glob:
+
+    Pipleine  <../../build/blitz/pipeline/pipeline.ipynb>
diff --git a/docs/source/tutorial/en/pretrain.rst b/docs/source/tutorial/en/pretrain.rst
index c82a0184..fd07ea27 100644
--- a/docs/source/tutorial/en/pretrain.rst
+++ b/docs/source/tutorial/en/pretrain.rst
@@ -21,6 +21,32 @@ Train a model
 
 The module interface definition is in `EduNLP.Pretrain`, including tokenization, data processing, model definition, model training.
 
+
+Pretrain tools
+#######################################
+
+
+Corpus dictionary
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+
+The corpus dictionary is a tool introduced in pre-training to facilitate user post-processing. It allows users to import and customize dictionary content and process the information of the corpus. For example:
+
+::
+
+   >>> from EduNLP.Pretrain.pretrian_utils import EduVocab
+   >>> vocab = EduVocab()
+   >>> print(vocab.tokens)
+   ['[PAD]', '[UNK]', '[BOS]', '[EOS]']
+
+   >>> token_list = ['An', 'apple', 'a', 'day', 'keeps', 'doctors', 'away']
+   >>> vocab.add_tokens(token_list)
+   >>> test_token_list = ['An', 'banana', 'is', 'a', 'kind', 'of', 'fruit']
+   >>> res = vocab.convert_sequence_to_token(vocab.convert_sequence_to_idx(test_token_list))
+   >>> print(res)
+   ['An', '[UNK]', '[UNK]', 'a', '[UNK]', '[UNK]', '[UNK]']
+
+
+
 Basic Steps
 ##################
 
diff --git a/docs/source/tutorial/en/tokenization.rst b/docs/source/tutorial/en/tokenization.rst
index 1ea9a94b..e6935a92 100644
--- a/docs/source/tutorial/en/tokenization.rst
+++ b/docs/source/tutorial/en/tokenization.rst
@@ -48,12 +48,16 @@ Tokenization container
 We provide various encapsulated tokenization containers for simple using, please check `EduNLP.Tokenizer` and `EduNLP.Pretrain` for more instances. Here is a tokenization container list:
 Generalized base tokenization containers:
 
-- TextTokenizer
+- CharTokenizer
+- SpaceTokenizer
+- CustomTokenizer
 - PureTextTokenizer
+- AstFormulaTokenizer
 - GensimSegTokenizer
 - GensimWordTokenizer
 
 Adapted tokenization containers for specific models:
+
 - ElmoTokenizer
 - BertTokenizer
 - DisenQTokenizer
@@ -64,44 +68,83 @@ Adapted tokenization containers for specific models:
    "Adapted tokenization containers for specific models" are used with corresponding T2V container, more discussion is in vectorization and pretrain parts.
 
 
-TextTokenizer
+CharTokenizer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Like the general tokenizer, `TextTokenizer` obtain token sequence with linear parsing method. Specifically, formula is parsed as pure text, and figure, tag and others and parsed as special tokens.
-Besides, we provide parameter `key` for selecting content in item.
+Character token parser. This token parser extracts each character of the text individually to form a token sequence.
+
+In addition, we provide a key parameter to select the pending content in the incoming item. You can also specify your own stop words to filter some text messages.
 
 ::
 
-   >>> tokenizer = TextTokenizer()
+   >>> items = [{
+   ...     "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+   ...     "options": ["1", "2"]
+   ... }]
 
-   >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-   >>> tokens = tokenizer(items)
-   >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-   ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-   '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-   '\\quad', 'A', '\\cap', 'B', '=']
+   >>> tokenizer = get_tokenizer("char")
+   >>> tokens = tokenizer(items, key=lambda x: x["stem"])
+   >>> print(next(tokens))
+   ['文', '具', '店', '有', '$', '600', '$', '本', '练', '习', '本', '卖', '出', '一', '些', '后', 
+   '还', '剩', '$', '4', '$', '包', '每', '包', '$', '25', '$', '本', '卖', '出', '多', '少', '本']
+
+
+SpaceTokenizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Space token parser. This token parser will tokenize the text based on the space to get the token sequence.
+
+In addition, we provide a key parameter to select the pending content in the incoming item. You can also specify your own stop words to filter some text messages.
+
+::
 
    >>> items = [{
-   ... "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
-   ... "options": ["1", "2"]
-   ... }]
+   ...  "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+   ...  "options": ["1", "2"]
+   ...  }]
+
+   >>> tokenizer = get_tokenizer("space", stop_words = [])
    >>> tokens = tokenizer(items, key=lambda x: x["stem"])
-   >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-   ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-   '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-   '\\quad', 'A', '\\cap', 'B', '=']
+   >>> print(next(tokens))
+   ['已知集合$A=\\left\\{x', '\\mid', 'x^{2}-3', 'x-4<0\\right\\},', '\\quad', 
+    'B=\\{-4,1,3,5\\},', '\\quad$', '则', '$A', '\\cap', 'B=$']
 
-   >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
-   >>> tokenizer = get_tokenizer("text") # tokenizer = TextTokenizer()
-   >>> tokens = tokenizer(items)
+
+CustomTokenizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Custom token parser. This token parser uses a linear parsing method to obtain a sequence of tokens. You can specify whether text, formulas, images, labels, separators, question gaps, etc. are converted into special characters and symbolized.
+
+In addition, we provide a key parameter to select the pending content in the incoming item. You can also specify your own stop words to filter some text messages.
+
+::
+
+   >>> items = [{
+   ...  "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+   ...  "options": ["1", "2"]
+   ...  }]
+
+   >>> tokenizer_t = get_tokenizer("custom", symbol='t')
+   >>> tokens = tokenizer_t(items, key=lambda x: x["stem"])
    >>> print(next(tokens))
-   ['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']
+   ['[TEXT]', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', 
+    '-', '4', '<', '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', 
+    ',', '3', ',', '5', '\\}', ',', '\\quad', '[TEXT]', 'A', '\\cap', 'B', '=']
+
+   >>> tokenizer_f = get_tokenizer("custom", symbol='f')
+   >>> tokens = tokenizer_f(items, key=lambda x: x["stem"])
+   >>> print(next(tokens))
+   ['已知', '集合', '[FORMULA]', '[FORMULA]']
+
+
 
 
 PureTextTokenizer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-`PureTextTokenizer` is similar to `TextTokenizer`, however, it ignores SIF special formula (e.g. `$\\FormFigureID{...}$` ， `$\\FormFigureBase64{...}$`), with text kept only.
+Plain text token parser. This token parser filters out specially processed formulas (e.g. '$FormFigureID{...} $` ， `$FormFigureBase64{...} $`) and preserves only text formatting formula.
+
+In addition, we provide a key parameter to select the pending content in the incoming item. You can also specify your own stop words to filter some text messages.
 
 ::
 
@@ -116,6 +159,25 @@ PureTextTokenizer
 
 
 
+AstFormulaTokenizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Abstract formula parser. This token parser abstracts mathematical formulas from text and performs a series of processing. For example, variables that appear are recorded and marked in turn, while objects such as expressions and pictures are converted to special characters and symbolized.
+
+In addition, we provide a key parameter to select the pending content in the incoming item. You can also specify your own stop words to filter some text messages.
+
+::
+   
+   >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
+
+   >>> tokenizer = get_tokenizer("ast_formula") 
+   >>> tokens = tokenizer(items)
+   >>> print(next(tokens))
+   ['公式', '[FORMULA]', '如图', '[FIGURE]', 'mathord_0', ',', 'mathord_1', '约束条件', '公式', 
+    '[FORMULA]', '[SEP]', 'mathord_2', '=', 'mathord_0', '+', 'textord', 'mathord_1', '最大值', '[MARK]']
+
+
+
 GensimWordTokenizer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/docs/source/tutorial/zh/tokenize/formula.rst b/docs/source/tutorial/zh/formula.rst
similarity index 100%
rename from docs/source/tutorial/zh/tokenize/formula.rst
rename to docs/source/tutorial/zh/formula.rst
diff --git a/docs/source/tutorial/zh/index.rst b/docs/source/tutorial/zh/index.rst
index ffe7092c..e9702f98 100644
--- a/docs/source/tutorial/zh/index.rst
+++ b/docs/source/tutorial/zh/index.rst
@@ -13,6 +13,8 @@
 
 *  `向量化 <vectorization.rst>`_ 
 
+*  `流水线 <pipeline.rst>`_ 
+
 主要流程
 ----------
 
@@ -26,7 +28,6 @@
 
 * `向量化 <vectorization.rst>`_：将令牌序列送入预训练模型，得到试题相应的表征向量。
 
-
 * **下游模型**：将预训练模型得到的试题表征应用于各种下游任务（如难度预测、知识点预测、相似题检索等）。
 
 示例
@@ -42,3 +43,5 @@
     令牌化  <../../build/blitz/sif/sif4sci.ipynb>
     
     向量化  <../../build/blitz/i2v/get_pretrained_i2v.ipynb>
+
+    流水线 <../../build/blitz/pipeline/pipeline.ipynb>
diff --git "a/docs/source/tutorial/zh/parse/\345\205\254\345\274\217\350\257\255\346\263\225\347\273\223\346\236\204\350\247\243\346\236\220.rst" "b/docs/source/tutorial/zh/parse/\345\205\254\345\274\217\350\257\255\346\263\225\347\273\223\346\236\204\350\247\243\346\236\220.rst"
deleted file mode 100644
index 94d8517c..00000000
--- "a/docs/source/tutorial/zh/parse/\345\205\254\345\274\217\350\257\255\346\263\225\347\273\223\346\236\204\350\247\243\346\236\220.rst"
+++ /dev/null
@@ -1,168 +0,0 @@
-公式语法结构解析
---------------------
-
-本功能主要由EduNLP.Formula模块实现，具有检查传入的公式是否合法，并将合法的公式转换为art树的形式。从实际使用的角度，本模块常作为中间处理过程，调用相应的模型即可自动选择本模块的相关参数，故一般不需要特别关注。
-
-主要内容介绍
-+++++++++++++++
-
-1.Formula:对传入的单个公式进行判断，判断传入的公式是否为str形式，如果是则使用ast的方法进行处理，否则进行报错。此外，提供了variable_standardization参数，当此参数为True时，使用变量标准化方法，即同一变量拥有相同的变量编号。
-
-2.FormulaGroup:如果需要传入公式集则可调用此接口，最终将形成ast森林，森林中树的结构同Formula。
-
-Formula
->>>>>>>>>>>>
-
-Formula 首先在分词功能中对原始文本的公式做切分处理，另外提供 ``公式解析树`` 功能，可以将数学公式的抽象语法分析树用文本或图片的形式表示出来。  
-
-本模块另提供公式变量标准化的功能，如判断几个子公式内的‘x’为同一变量。
-
-初始化
-+++++++++
-
-传入参数：item 
-
-item为str 或 List[Dict]类型，具体内容为latex 公式 或 公式经解析后产生的抽象语法分析树。
-
-::
-
-   >>> f=Formula("x^2 + x+1 = y")
-   >>> f
-   <Formula: x^2 + x+1 = y>
-
-查看公式切分后的具体内容
-++++++++++++++++++++++++++++
-
-- 查看公式切分后的结点元素
-
-::
-
-   >>> f.elements
-   [{'id': 0, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   {'id': 1, 'type': 'mathord', 'text': 'x', 'role': 'base'},
-   {'id': 2, 'type': 'textord', 'text': '2', 'role': 'sup'},
-   {'id': 3, 'type': 'bin', 'text': '+', 'role': None},
-   {'id': 4, 'type': 'mathord', 'text': 'x', 'role': None},
-   {'id': 5, 'type': 'bin', 'text': '+', 'role': None},
-   {'id': 6, 'type': 'textord', 'text': '1', 'role': None},
-   {'id': 7, 'type': 'rel', 'text': '=', 'role': None},
-   {'id': 8, 'type': 'mathord', 'text': 'y', 'role': None}]
-
-- 查看公式的抽象语法分析树
-
-::
-
-   >>> f.ast
-   [{'val': {'id': 0, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   'structure': {'bro': [None, 3],'child': [1, 2],'father': None,'forest': None}},
-   {'val': {'id': 1, 'type': 'mathord', 'text': 'x', 'role': 'base'},
-   'structure': {'bro': [None, 2], 'child': None, 'father': 0, 'forest': None}},
-   {'val': {'id': 2, 'type': 'textord', 'text': '2', 'role': 'sup'},
-   'structure': {'bro': [1, None], 'child': None, 'father': 0, 'forest': None}},
-   {'val': {'id': 3, 'type': 'bin', 'text': '+', 'role': None},
-   'structure': {'bro': [0, 4], 'child': None, 'father': None, 'forest': None}},
-   {'val': {'id': 4, 'type': 'mathord', 'text': 'x', 'role': None},
-   'structure': {'bro': [3, 5], 'child': None, 'father': None, 'forest': None}},
-   {'val': {'id': 5, 'type': 'bin', 'text': '+', 'role': None},
-   'structure': {'bro': [4, 6], 'child': None, 'father': None, 'forest': None}},
-   {'val': {'id': 6, 'type': 'textord', 'text': '1', 'role': None},
-   'structure': {'bro': [5, 7], 'child': None, 'father': None, 'forest': None}},
-   {'val': {'id': 7, 'type': 'rel', 'text': '=', 'role': None},
-   'structure': {'bro': [6, 8], 'child': None, 'father': None, 'forest': None}},
-   {'val': {'id': 8, 'type': 'mathord', 'text': 'y', 'role': None},
-   'structure': {'bro': [7, None],'child': None,'father': None,'forest': None}}]
-
-   >>> print('nodes: ',f.ast_graph.nodes)
-   nodes:  [0, 1, 2, 3, 4, 5, 6, 7, 8]
-   >>> print('edges: ' ,f.ast_graph.edges)
-   edges:  [(0, 1), (0, 2)]
-
-- 将抽象语法分析树用图片表示
-
-::
-
-   >>> ForestPlotter().export(f.ast_graph, root_list=[node["val"]["id"] for node in f.ast if node["structure"]["father"] is None],)
-   >>> plt.show()
-
-.. figure:: ../../../_static/formula.png
-
-变量标准化
-+++++++++++
-
-此参数使得同一变量拥有相同的变量编号。
-
-如：``x`` 变量的编号为 ``0``， ``y`` 变量的编号为 ``1``。
-
-::
-
-   >>> f.variable_standardization().elements
-   [{'id': 0, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   {'id': 1, 'type': 'mathord', 'text': 'x', 'role': 'base', 'var': 0},
-   {'id': 2, 'type': 'textord', 'text': '2', 'role': 'sup'},
-   {'id': 3, 'type': 'bin', 'text': '+', 'role': None},
-   {'id': 4, 'type': 'mathord', 'text': 'x', 'role': None, 'var': 0},
-   {'id': 5, 'type': 'bin', 'text': '+', 'role': None},
-   {'id': 6, 'type': 'textord', 'text': '1', 'role': None},
-   {'id': 7, 'type': 'rel', 'text': '=', 'role': None},
-   {'id': 8, 'type': 'mathord', 'text': 'y', 'role': None, 'var': 1}]
-
-FormulaGroup
->>>>>>>>>>>>>>>
-
-调用 ``FormulaGroup`` 类解析公式方程组，相关的属性和函数方法同上。
-
-::
-
-   >>> fs = FormulaGroup(["x^2 = y", "x^3 = y^2", "x + y = \pi"])
-   >>> fs
-   <FormulaGroup: <Formula: x^2 = y>;<Formula: x^3 = y^2>;<Formula: x + y = \pi>>
-   >>> fs.elements
-   [{'id': 0, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   {'id': 1, 'type': 'mathord', 'text': 'x', 'role': 'base'},
-   {'id': 2, 'type': 'textord', 'text': '2', 'role': 'sup'},
-   {'id': 3, 'type': 'rel', 'text': '=', 'role': None},
-   {'id': 4, 'type': 'mathord', 'text': 'y', 'role': None},
-   {'id': 5, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   {'id': 6, 'type': 'mathord', 'text': 'x', 'role': 'base'},
-   {'id': 7, 'type': 'textord', 'text': '3', 'role': 'sup'},
-   {'id': 8, 'type': 'rel', 'text': '=', 'role': None},
-   {'id': 9, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   {'id': 10, 'type': 'mathord', 'text': 'y', 'role': 'base'},
-   {'id': 11, 'type': 'textord', 'text': '2', 'role': 'sup'},
-   {'id': 12, 'type': 'mathord', 'text': 'x', 'role': None},
-   {'id': 13, 'type': 'bin', 'text': '+', 'role': None},
-   {'id': 14, 'type': 'mathord', 'text': 'y', 'role': None},
-   {'id': 15, 'type': 'rel', 'text': '=', 'role': None},
-   {'id': 16, 'type': 'mathord', 'text': '\\pi', 'role': None}]
-   >>> fs.ast
-   [{'val': {'id': 0, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   'structure': {'bro': [None, 3],
-      'child': [1, 2],
-      'father': None,
-      'forest': None}},
-   {'val': {'id': 1, 'type': 'mathord', 'text': 'x', 'role': 'base'},
-   'structure': {'bro': [None, 2],
-      'child': None,
-      'father': 0,
-      'forest': [6, 12]}},
-   {'val': {'id': 2, 'type': 'textord', 'text': '2', 'role': 'sup'},
-   'structure': {'bro': [1, None], 'child': None, 'father': 0, 'forest': None}},
-   {'val': {'id': 3, 'type': 'rel', 'text': '=', 'role': None},
-   'structure': {'bro': [0, 4], 'child': None, 'father': None, 'forest': None}},
-   {'val': {'id': 4, 'type': 'mathord', 'text': 'y', 'role': None},
-   'structure': {'bro': [3, None],
-      'child': None,
-      'father': None,
-      'forest': [10, 14]}},
-   {'val': {'id': 5, 'type': 'supsub', 'text': '\\supsub', 'role': None},
-   'structure': {'bro': [None, 8],
-      'child': [6, 7],
-      'father': None,
-      'forest': None}},
-   {'val': {'id': 6, 'type': 'mathord', 'text': 'x', 'role': 'base'},
-   show more (open the raw output data in a text editor) ...
-   >>> fs.variable_standardization()[0]
-   [{'id': 0, 'type': 'supsub', 'text': '\\supsub', 'role': None}, {'id': 1, 'type': 'mathord', 'text': 'x', 'role': 'base', 'var': 0}, {'id': 2, 'type': 'textord', 'text': '2', 'role': 'sup'}, {'id': 3, 'type': 'rel', 'text': '=', 'role': None}, {'id': 4, 'type': 'mathord', 'text': 'y', 'role': None, 'var': 1}]
-   >>> ForestPlotter().export(fs.ast_graph, root_list=[node["val"]["id"] for node in fs.ast if node["structure"]["father"] is None],)
-
-.. figure:: ../../../_static/formulagroup.png
\ No newline at end of file
diff --git "a/docs/source/tutorial/zh/parse/\346\226\207\346\234\254\350\257\255\346\263\225\347\273\223\346\236\204\350\247\243\346\236\220.rst" "b/docs/source/tutorial/zh/parse/\346\226\207\346\234\254\350\257\255\346\263\225\347\273\223\346\236\204\350\247\243\346\236\220.rst"
deleted file mode 100644
index aaa54b64..00000000
--- "a/docs/source/tutorial/zh/parse/\346\226\207\346\234\254\350\257\255\346\263\225\347\273\223\346\236\204\350\247\243\346\236\220.rst"
+++ /dev/null
@@ -1,72 +0,0 @@
-文本语法结构解析
---------------------
-
-本部分主要由EduNLP.SIF.Parse模块实现，主要功能为将文本中的字母、数字等进行提取，将其转换为标准格式。
-
-此模块主要作为 *中间模块* 来对输入的生文本进行解析处理，用户一般不直接调用此模块。
-
-主要流程介绍
-+++++++++++++++
-
-1.按照以下顺序，先后对传入的文本进行判断类型
-
-* is_chinese：用于匹配中文字符 [\u4e00-\u9fa5]
- 
-* is_alphabet：匹配公式之外的英文字母，将匹配到的只对两个汉字之间的字母做修正（使用$$包裹起来），其余匹配到的情况视为不合 latex 语法录入的公式
- 
-* is_number：匹配公式之外的数字，只对两个汉字之间的数字做修正（使用$$包裹起来），其余匹配到的情况视为不合 latex 语法录入的公式
- 
-2.匹配 latex 公式
-
-* latex 中出现中文字符，打印且只打印一次 warning
- 
-* 使用_is_formula_legal函数，检查latex公式的完整性和可解析性，对于不合法公式报错
-
-输入
->>>>>>>
-
-类型：str  
-
-内容：题目文本 （text）
-
-::
-
-   >>> text1 = '生产某种零件的A工厂25名工人的日加工零件数_   _'
-   >>> text2 = 'X的分布列为(   )'
-   >>> text3 = '① AB是⊙O的直径，AC是⊙O的切线，BC交⊙O于点E．AC的中点为D'
-   >>> text4 = '支持公式如$\\frac{y}{x}$，$\\SIFBlank$，$\\FigureID{1}$，不支持公式如$\\frac{ \\dddot y}{x}$'
-
-进行解析
->>>>>>>>>>>>>>>>>>>>
-
-::
-
-   >>> text_parser1 = Parser(text1)
-   >>> text_parser2 = Parser(text2)
-   >>> text_parser3 = Parser(text3)
-   >>> text_parser4 = Parser(text4)
-
-相关描述参数
->>>>>>>>>>>>
-
-- 尝试转换为标准形式
-
-::
-
-   >>> text_parser1.description_list()
-   >>> print('text_parser1.text:',text_parser1.text)
-   text_parser1.text: 生产某种零件的$A$工厂$25$名工人的日加工零件数$\SIFBlank$
-   >>> text_parser2.description_list()
-   >>> print('text_parser2.text:',text_parser2.text)
-   text_parser2.text: $X$的分布列为$\SIFChoice$
-
-- 判断是否有语法问题
-
-::
-
-   >>> text_parser3.description_list()
-   >>> print('text_parser3.error_flag: ',text_parser3.error_flag)
-   text_parser3.error_flag:  1
-   >>> text_parser4.description_list()
-   >>> print('text_parser4.fomula_illegal_flag: ',text_parser4.fomula_illegal_flag)
-   text_parser4.fomula_illegal_flag:  1
diff --git a/docs/source/tutorial/zh/pipeline.rst b/docs/source/tutorial/zh/pipeline.rst
new file mode 100644
index 00000000..6dca611e
--- /dev/null
+++ b/docs/source/tutorial/zh/pipeline.rst
@@ -0,0 +1,10 @@
+=======
+流水线
+=======
+
+.. nbgallery::
+    :caption: This is a thumbnail gallery:
+    :name: pipleine_gallery
+    :glob:
+
+    流水线  <../../build/blitz/pipeline/pipeline.ipynb>
diff --git a/docs/source/tutorial/zh/pretrain.rst b/docs/source/tutorial/zh/pretrain.rst
index e56313d1..82092160 100644
--- a/docs/source/tutorial/zh/pretrain.rst
+++ b/docs/source/tutorial/zh/pretrain.rst
@@ -7,17 +7,74 @@
 
 * 如何从零开始用一份语料训练得到一个预训练模型
 * 如何加载预训练模型
-* 公开的预训练模型
 
 
 训练模型
 -----------------------
 
-模型模块的接口定义在 `EduNLP.Pretrain` 中，包含令牌化容器、数据处理、模型定义、模型训练等功能。
+训练模块的接口定义在 `EduNLP.Pretrain` 中，包含令牌化容器、数据处理、模型训练等功能。
 
 
-基本步骤：
+预训练工具
 #######################################
+为了方便研究人员构造自定义的训练过程，我们提供了机模型训练的常用功能，包括：
+
+* 语料库词典 (Vocab)
+* 预训练令牌化容器 (Tokenizer)
+* 数据容器 (Datasets)
+
+语料库词典
+>>>>>>>>>>>>>>>>>>>>>>>>
+
+语料库词典是预训练中为了便于用户进行后续处理而引入的工具。它支持用户导入并自定义词典内容，并对语料库的信息进行一定的处理。例如：
+
+::
+
+   >>> from EduNLP.Pretrain.pretrian_utils import EduVocab
+   >>> vocab = EduVocab()
+   >>> print(vocab.tokens)
+   ['[PAD]', '[UNK]', '[BOS]', '[EOS]']
+
+   >>> token_list = ['An', 'apple', 'a', 'day', 'keeps', 'doctors', 'away']
+   >>> vocab.add_tokens(token_list)
+   >>> test_token_list = ['An', 'banana', 'is', 'a', 'kind', 'of', 'fruit']
+   >>> res = vocab.convert_sequence_to_token(vocab.convert_sequence_to_idx(test_token_list))
+   >>> print(res)
+   ['An', '[UNK]', '[UNK]', 'a', '[UNK]', '[UNK]', '[UNK]']
+
+
+预训练令牌化容器
+>>>>>>>>>>>>>>>>>>>>>>>>
+
+在训练模型前, 需要将题目文本进行分词, 并将其转化为语料库字典中的词ID, 同时进行必要的预处理, 如OOV、Padding等常见操作。
+我们将 `EduNLP` 的令牌化操作和通用的预处理操作封装在了自定义的基类 `PretrainedEduTokenizer` 中。
+
+此外, 为了兼容Huggingface的预训练库 `Transformers`, 我们提供了基类 `TokenizerForHuggingface`。例如 `EduNLP.Pretrin.BertTokenizer` 兼容 `transformers.BertTokenizer`
+具体用法参考如下。
+
+.. nbgallery::
+    :caption: This is a thumbnail gallery:
+    :name: pretrained_tokenizer_gallery
+    :glob:
+
+    自定义分词器  <../../build/blitz/pretrain/pretrained_tokenizer.ipynb>
+    
+    Huggingface分词器  <../../build/blitz/pretrain/hugginface_tokenizer.ipynb>
+
+
+预训练Dataset
+>>>>>>>>>>>>>>>>>>>>>>>>
+
+我们提供EduDataset基类, 封装了对教育数据的预处理，此外，考虑到教育数据规模巨大的特点, 我们提供并行处理操作和本地保存、加载等操作，加速数据预处理过程。
+详细使用参考API文档 `Pretrain.pretrian_utils` 部分。
+
+
+
+基本步骤
+#######################################
+
+训练模型
+>>>>>>>>>>>>>>>>>>>>>>>>
 
 以训练word2vec为例说明：
 
@@ -48,18 +105,26 @@ Examples：
    train_vector(sif_items, "../../../data/w2v/gensim_luna_stem_tf_", 10, method="d2v")
 
 
-装载模型
------------------------
+加载预训练模型
+>>>>>>>>>>>>>>>>>>>>>>>>
+
+我们提供三种加载方式
+
+* 原生加载接口: `MODEL.from_pretrained()`. 适用于研究者，提供模型原生加载接口，方便应用到自定义的下游模型。
+* 向量化容器: `I2V` 或 `T2V`. 适用于表征级应用，直接提供模型的向量化操作。
+* 流水线容器：`Pipeline`. 适用于任务级应用，针对对具体的任务，封装了完整的令牌化、向量化、结果预测的等流水线操作。
+
+原生加载接口可参考 `Modelzoo` 各个具体的模型, `I2V` 和 `Pipeline` 的用法可分别参考向量化部分和流水线部分的教程和及API。
+**这里以向量化容器I2V举例, 通过向量化获取题目表征。**
 
-将所得到的模型传入I2V模块即可装载模型，通过向量化获取题目表征。
- 
 Examples：
 
 ::
 
+   from EduNLP.I2V import D2V
+   
    model_path = "../test_model/d2v/test_gensim_luna_stem_tf_d2v_256.bin"
-   i2v = D2V("text","d2v",filepath=model_path, pretrained_t2v = False)
-
+   i2v = D2V("text", "d2v", filepath=model_path, pretrained_t2v=False)
 
 
 更多模型训练案例
@@ -100,20 +165,20 @@ gensim模型w2v例子
 ########################################
 
 .. nbgallery::
-    :caption: This is a thumbnail gallery:
-    :name: pretrain_gallery1
-    :glob:
+   :caption: This is a thumbnail gallery:
+   :name: pretrain_gallery1
+   :glob:
 
-    Elmo预训练  <../../build/blitz/pretrain/elmo.ipynb>
+   Elmo预训练  <../../build/blitz/pretrain/elmo.ipynb>
 
-    Bert预训练  <../../build/blitz/pretrain/bert.ipynb>
+   Bert预训练  <../../build/blitz/pretrain/bert.ipynb>
 
 
 .. nbgallery::
-    :caption: This is a thumbnail gallery:
-    :name: pretrain_gallery2
-    :glob:
+   :caption: This is a thumbnail gallery:
+   :name: pretrain_gallery2
+   :glob:
 
-    DisenQNet预训练  <../../build/blitz/pretrain/disenq.ipynb>
-    
-    QuesNet预训练  <../../build/blitz/pretrain/quesnet.ipynb>
+   DisenQNet预训练  <../../build/blitz/pretrain/disenq.ipynb>
+   
+   QuesNet预训练  <../../build/blitz/pretrain/quesnet.ipynb>
diff --git a/docs/source/tutorial/zh/pretrain/loading.rst b/docs/source/tutorial/zh/pretrain/loading.rst
deleted file mode 100644
index 61d47d49..00000000
--- a/docs/source/tutorial/zh/pretrain/loading.rst
+++ /dev/null
@@ -1,11 +0,0 @@
-装载模型
---------
-
-将所得到的模型传入I2V模块即可装载模型
- 
-Examples：
-
-::
-
-        >>> model_path = "../test_model/d2v/test_gensim_luna_stem_tf_d2v_256.bin"
-        >>> i2v = D2V("text","d2v",filepath=model_path, pretrained_t2v = False)
diff --git a/docs/source/tutorial/zh/pretrain/pub.rst b/docs/source/tutorial/zh/pretrain/pub.rst
deleted file mode 100644
index 297867a2..00000000
--- a/docs/source/tutorial/zh/pretrain/pub.rst
+++ /dev/null
@@ -1,73 +0,0 @@
-公开模型一览
-------------
-
-版本说明
-##################
-
-一级版本
-
-* 公开版本1（luna_pub）：高考
-* 公开版本2（ luna_pub_large）：高考 + 地区试题
-
-二级版本：
-
-* 小科（Chinese,Math,English,History,Geography,Politics,Biology,Physics,Chemistry）
-* 大科（理科science、文科literal、全科all）
-
-三级版本：【待完成】
-
-* 不使用第三方初始化词表
-* 使用第三方初始化词表 
-
-模型训练数据说明
-##################
-
-* 当前【词向量w2v】【句向量d2v】模型所用的数据均为 【高中学段】 的题目
-* 测试数据：`[OpenLUNA.json] <http://base.ustc.edu.cn/data/OpenLUNA/OpenLUNA.json>`_
-
-当前提供以下模型，更多分学科、分题型模型正在训练中，敬请期待
-    "d2v_all_300"(全科)，"d2v_science_300"(理科)，"d2v_english_300"（英语），"d2v_literal_300"(文科)
-
-模型训练案例
-------------
-
-获得数据集
-####################
-
-.. toctree::
-   :maxdepth: 1
-   :titlesonly:
-
-   prepare_dataset  <../../../build/blitz/pretrain/prepare_dataset.ipynb>
-
-gensim模型d2v例子
-####################
-
-.. toctree::
-   :maxdepth: 1
-   :titlesonly:
-
-   d2v_bow_tfidf  <../../../build/blitz/pretrain/gensim/d2v_bow_tfidf.ipynb>
-   d2v_general  <../../../build/blitz/pretrain/gensim/d2v_general.ipynb>
-   d2v_stem_tf  <../../../build/blitz/pretrain/gensim/d2v_stem_tf.ipynb>
-
-gensim模型w2v例子
-####################
-
-.. toctree::
-   :maxdepth: 1
-   :titlesonly:
-
-   w2v_stem_text  <../../../build/blitz/pretrain/gensim/w2v_stem_text.ipynb>
-   w2v_stem_tf  <../../../build/blitz/pretrain/gensim/w2v_stem_tf.ipynb>
-
-seg_token例子
-####################
-
-.. toctree::
-   :maxdepth: 1
-   :titlesonly:
-
-   d2v.ipynb  <../../../build/blitz/pretrain/seg_token/d2v.ipynb>
-   d2v_d1  <../../../build/blitz/pretrain/seg_token/d2v_d1.ipynb>
-   d2v_d2  <../../../build/blitz/pretrain/seg_token/d2v_d2.ipynb>
diff --git a/docs/source/tutorial/zh/pretrain/start.rst b/docs/source/tutorial/zh/pretrain/start.rst
deleted file mode 100644
index f87d6afa..00000000
--- a/docs/source/tutorial/zh/pretrain/start.rst
+++ /dev/null
@@ -1,24 +0,0 @@
-训练模型
-------------
-
-如需训练模型则可直接train_vector函数接口，来使使训练模型更加方便。模块调用gensim库中的相关训练模型，目前提供了"sg"、 "cbow"、 "fastext"、 "d2v"、 "bow"、 "tfidf"的训练方法，并提供了embedding_dim参数，使之可以按照需求确定向量的维度。
-
-基本步骤
-##################
-
-1.确定模型的类型，选择适合的Tokenizer（GensimWordTokenizer、 GensimSegTokenizer），使之令牌化；
-
-2.调用train_vector函数，即可得到所需的预训练模型。
-
-Examples：
-
-::
-
-        >>> tokenizer = GensimWordTokenizer(symbol="gmas", general=True)
-        >>> token_item = tokenizer("有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
-        ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$")
-        >>> print(token_item.tokens[:10])
-        ['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]']
-        
-        # 10 dimension with fasstext method
-        train_vector(sif_items, "../../../data/w2v/gensim_luna_stem_tf_", 10, method="d2v")
diff --git "a/docs/source/tutorial/zh/seg/\347\273\223\346\236\204\346\210\220\345\210\206\345\210\206\350\247\243.rst" "b/docs/source/tutorial/zh/seg/\347\273\223\346\236\204\346\210\220\345\210\206\345\210\206\350\247\243.rst"
deleted file mode 100644
index bffe1b64..00000000
--- "a/docs/source/tutorial/zh/seg/\347\273\223\346\236\204\346\210\220\345\210\206\345\210\206\350\247\243.rst"
+++ /dev/null
@@ -1,61 +0,0 @@
-结构成分分解
-------------
-
-对切片后的item中的各个元素进行分词，提供深度选项，可以按照需求选择所有地方切分或者在部分标签处切分（比如\SIFSep、\SIFTag处）；对标签添加的位置也可以进行选择，可以在头尾处添加或仅在头或尾处添加。
-
-具有两种模式，一种是linear模式，用于对文本进行处理（使用jieba库进行分词）；一种是ast模式，用于对公式进行解析。
-
-基础使用方法
-++++++++++++++++++
-
-::
-
- >>> test_item = r"如图所示，则$\bigtriangleup ABC$的面积是$\SIFBlank$。$\FigureID{1}$"
- >>> seg(test_item)
- >>> ['如图所示，则', '\\bigtriangleup ABC', '的面积是', '\\SIFBlank', '。', \FigureID{1}]
-
-可选的的额外参数/接口
-++++++++++++++++++++++
-
-1.describe：可以统计出各种类型元素的数量
-
-::
-
- >>> s.describe()
- {'t': 3, 'f': 1, 'g': 1, 'm': 1}
-
-2.filter：可以选择性的筛除某种或几种类型的元素
-
-此接口可传入keep参数来选择需要保留的元素类型，也可直接传入特殊字符来筛除特定元素类型
-
-各字母所代表的元素类型：
-   "t": text
-   "f": formula
-   "g": figure
-   "m": question mark
-   "a": tag
-   "s": sep tag
-
-::
-
- >>> with s.filter("f"):
- ...     s
- ['如图所示，则', '的面积是', '\\SIFBlank', '。', \FigureID{1}]
- >>> with s.filter(keep="t"):
- ...     s
- ['如图所示，则', '的面积是', '。']
-
-3.symbol:选择性的将部分类型的数据转换为特殊符号遮掩起来
-
-symbol所代表的元素类型：
-   "t": text
-   "f": formula
-   "g": figure
-   "m": question mark
-
-::
-
- >>> seg(test_item, symbol="fgm")
- ['如图所示，则', '[FORMULA]', '的面积是', '[MARK]', '。', '[FIGURE]']
- >>> seg(test_item, symbol="tfgm")
- ['[TEXT]', '[FORMULA]', '[TEXT]', '[MARK]', '[TEXT]', '[FIGURE]']
diff --git "a/docs/source/tutorial/zh/seg/\350\257\255\344\271\211\346\210\220\345\210\206\345\210\206\350\247\243.rst" "b/docs/source/tutorial/zh/seg/\350\257\255\344\271\211\346\210\220\345\210\206\345\210\206\350\247\243.rst"
deleted file mode 100644
index 8c709a89..00000000
--- "a/docs/source/tutorial/zh/seg/\350\257\255\344\271\211\346\210\220\345\210\206\345\210\206\350\247\243.rst"
+++ /dev/null
@@ -1,47 +0,0 @@
-语义成分分解
-------------
-
-由于选择题是以字典的形式给出，故需要将其在保留数据类型关系的情况下转换为文本格式。dict2str4sif函数就是实现此功能的一个模块，该模块可以将选择题形式的item转换为字符格式，并将题干和选项、各选项之间分割开来。
-
-
-基础使用方法
-++++++++++++++++++
-
-::
-
- >>> item = {
- ...     "stem": r"若复数$z=1+2 i+i^{3}$，则$|z|=$",
- ...     "options": ['0', '1', r'$\sqrt{2}$', '2'],
- ... }
- >>> dict2str4sif(item) # doctest: +ELLIPSIS
- '$\\SIFTag{stem_begin}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem_end}$$\\SIFTag{options_begin}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$$\\SIFTag{list_3}$2$\\SIFTag{options_end}$'
-
-可选的的额外参数/接口
-++++++++++++++++++++++
-
-1.add_list_no_tag：当此参数为True较False时区别在于是否需要将选项部分的标签计数
-
-::
-
- >>> dict2str4sif(item, add_list_no_tag=True) # doctest: +ELLIPSIS
- '$\\SIFTag{stem_begin}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem_end}$$\\SIFTag{options_begin}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$$\\SIFTag{list_3}$2$\\SIFTag{options_end}$'
- 
- >>> dict2str4sif(item, add_list_no_tag=False) # doctest: +ELLIPSIS
- '$\\SIFTag{stem_begin}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem_end}$$\\SIFTag{options_begin}$0$\\SIFSep$1$\\SIFSep$$\\sqrt{2}$$\\SIFSep$2$\\SIFTag{options_end}$'
-
-2.tag_mode:此参数为选择标签所在位置，delimiter为头尾都加标签，head为仅头部加标签，tail为仅尾部加标签
-
-::
-
- >>> dict2str4sif(item, tag_mode="head") # doctest: +ELLIPSIS
- '$\\SIFTag{stem}$若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{options}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$$\\SIFTag{list_3}$2'
- 
- >>> dict2str4sif(item, tag_mode="tail") # doctest: +ELLIPSIS
- '若复数$z=1+2 i+i^{3}$，则$|z|=$$\\SIFTag{stem}$$\\SIFTag{list_0}$0$\\SIFTag{list_1}$1$\\SIFTag{list_2}$$\\sqrt{2}$$\\SIFTag{list_3}$2$\\SIFTag{options}$'
-
-3.key_as_tag:当其为False时则不区分切分标签的类型，而是仅在选项之间加入$\SIFSep$
-
-::
-
- >>> dict2str4sif(item, key_as_tag=False)
- '若复数$z=1+2 i+i^{3}$，则$|z|=$0$\\SIFSep$1$\\SIFSep$$\\sqrt{2}$$\\SIFSep$2'
\ No newline at end of file
diff --git a/docs/source/tutorial/zh/tokenization.rst b/docs/source/tutorial/zh/tokenization.rst
index 63db65cf..dcc84c4e 100644
--- a/docs/source/tutorial/zh/tokenization.rst
+++ b/docs/source/tutorial/zh/tokenization.rst
@@ -53,11 +53,15 @@
 
 通用化的基础令牌化容器
 
-- TextTokenizer
+- CharTokenizer
+- SpaceTokenizer
+- CustomTokenizer
 - PureTextTokenizer
+- AstFormulaTokenizer
 - GensimSegTokenizer
 - GensimWordTokenizer
 
+
 适配特定模型的令牌化容器
 
 - ElmoTokenizer
@@ -67,47 +71,89 @@
 
 .. note::
 
-   “适配特定模型的令牌化容器” 需要与相应的T2V容器配合使用，本节仅介绍 “通用化的基础令牌化容器” 的使用方法。
-   如需查询ElmoTokenizer等令牌化容器，请前往预训练或向量化部分进行学习。
+   “适配特定模型的令牌化容器” 需要与相应的 T2V 容器配合使用，本节仅介绍 “通用化的基础令
+   牌化容器” 的使用方法。如需查询 ElmoTokenizer 等令牌化容器，请前往预训练或向量化部分
+   进行学习。
+
 
 
-TextTokenizer
+CharTokenizer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-即文本令牌解析器，此令牌解析器同一般的文本分词器一样，采用线性解析方法得到令牌序列。其中，公式成分被视为文本，不关心公式的语法结构，作线性解析处理；而图片、标签、分隔符、题目空缺符等成分被转换成特殊字符，作符号化处理。此外，提供key参数用于选择传入的item中待处理的内容。
+字符令牌解析器。此令牌解析器将文本的每个字符单独提取出来组成令牌序列。
 
-::
+此外，提供 key 参数用于选择传入的 item 中待处理的内容。你也可以指定自己的停用词以过滤一部分文本信息。
 
-   >>> tokenizer = TextTokenizer()
+::
 
-   >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-   >>> tokens = tokenizer(items)
-   >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-   ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-   '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-   '\\quad', 'A', '\\cap', 'B', '=']
-   
    >>> items = [{
-   ... "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
-   ... "options": ["1", "2"]
+   ...     "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+   ...     "options": ["1", "2"]
    ... }]
+
+   >>> tokenizer = get_tokenizer("char")
    >>> tokens = tokenizer(items, key=lambda x: x["stem"])
-   >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-   ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-   '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-   '\\quad', 'A', '\\cap', 'B', '=']
+   >>> print(next(tokens))
+   ['文', '具', '店', '有', '$', '600', '$', '本', '练', '习', '本', '卖', '出', '一', '些', '后', 
+   '还', '剩', '$', '4', '$', '包', '每', '包', '$', '25', '$', '本', '卖', '出', '多', '少', '本']
 
-   >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
-   >>> tokenizer = get_tokenizer("text") # tokenizer = TextTokenizer()
-   >>> tokens = tokenizer(items)
+
+SpaceTokenizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+空格令牌解析器。此令牌解析器将根据空格对文本进行分词，得到令牌序列。
+
+此外，提供 key 参数用于选择传入的 item 中待处理的内容。你也可以指定自己的停用词以过滤一部分文本信息。
+
+::
+
+   >>> items = [{
+   ...  "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+   ...  "options": ["1", "2"]
+   ...  }]
+
+   >>> tokenizer = get_tokenizer("space", stop_words = [])
+   >>> tokens = tokenizer(items, key=lambda x: x["stem"])
+   >>> print(next(tokens))
+   ['已知集合$A=\\left\\{x', '\\mid', 'x^{2}-3', 'x-4<0\\right\\},', '\\quad', 
+    'B=\\{-4,1,3,5\\},', '\\quad$', '则', '$A', '\\cap', 'B=$']
+
+
+CustomTokenizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+自定义令牌解析器。此令牌解析器同一般的文本分词器一样，采用线性解析方法得到令牌序列。你可以指定文本、公式、图片、标签、分隔符、题目空缺符等成分是否被转换成特殊字符，并作符号化处理。
+
+此外，提供 key 参数用于选择传入的 item 中待处理的内容。你也可以指定自己的停用词以过滤一部分文本信息。
+
+::
+
+   >>> items = [{
+   ...  "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
+   ...  "options": ["1", "2"]
+   ...  }]
+
+   >>> tokenizer_t = get_tokenizer("custom", symbol='t')
+   >>> tokens = tokenizer_t(items, key=lambda x: x["stem"])
    >>> print(next(tokens))
-   ['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']
+   ['[TEXT]', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', 
+    '-', '4', '<', '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', 
+    ',', '3', ',', '5', '\\}', ',', '\\quad', '[TEXT]', 'A', '\\cap', 'B', '=']
+
+   >>> tokenizer_f = get_tokenizer("custom", symbol='f')
+   >>> tokens = tokenizer_f(items, key=lambda x: x["stem"])
+   >>> print(next(tokens))
+   ['已知', '集合', '[FORMULA]', '[FORMULA]']
+
+
 
 
 PureTextTokenizer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-功能同 `TextTokenizer` , 且它会过滤掉经特殊处理的公式（例如：`$\\FormFigureID{...}$` ， `$\\FormFigureBase64{...}$` ），仅保留文本格式的公式。
+纯文本令牌解析器。此令牌解析器会过滤掉经特殊处理的公式（例如：`$\\FormFigureID{...}$` ， `$\\FormFigureBase64{...}$` ），仅保留文本格式的公式。
+
+此外，提供 key 参数用于选择传入的 item 中待处理的内容。你也可以指定自己的停用词以过滤一部分文本信息。
 
 ::
 
@@ -122,6 +168,26 @@ PureTextTokenizer
 
 
 
+AstFormulaTokenizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+抽象公式解析器。此令牌解析器在文本中抽象出数学公式，并进行一系列处理。例如，将出现的变量将依次记录和标记，而表达式和图片等对象被转换成特殊字符，并作符号化处理。
+
+此外，提供 key 参数用于选择传入的 item 中待处理的内容。你也可以指定自己的停用词以过滤一部分文本信息。
+
+::
+   
+   >>> items = ["有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\FormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
+
+   >>> tokenizer = get_tokenizer("ast_formula") 
+   >>> tokens = tokenizer(items)
+   >>> print(next(tokens))
+   ['公式', '[FORMULA]', '如图', '[FIGURE]', 'mathord_0', ',', 'mathord_1', '约束条件', '公式', 
+    '[FORMULA]', '[SEP]', 'mathord_2', '=', 'mathord_0', '+', 'textord', 'mathord_1', '最大值', '[MARK]']
+
+
+
+
 GensimWordTokenizer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/docs/source/tutorial/zh/tokenization/GensimSegTokenizer.rst b/docs/source/tutorial/zh/tokenization/GensimSegTokenizer.rst
deleted file mode 100644
index f1a66d77..00000000
--- a/docs/source/tutorial/zh/tokenization/GensimSegTokenizer.rst
+++ /dev/null
@@ -1,9 +0,0 @@
-GensimSegTokenizer
-=====================
-
-此令牌解析器在默认情况下对传入的item中的图片、分隔符、题目空缺符等部分则转换成特殊字符进行保护，从而对文本、公式、标签进行令牌化操作。此外，从令牌化方法而言，此令牌解析器对文本均采用线性的分析方法，而对公式采用抽象语法树的分析方法。
-
-与GensimWordTokenizer相比，GensimSegTokenizer解析器主要区别是：
-
-* 提供了切分深度的选项，即可以在sep标签或者tag标签处进行切割
-* 默认在item组分（如text、formula）的头部插入开始标签
diff --git a/docs/source/tutorial/zh/tokenization/GensimWordTokenizer.rst b/docs/source/tutorial/zh/tokenization/GensimWordTokenizer.rst
deleted file mode 100644
index e8924e21..00000000
--- a/docs/source/tutorial/zh/tokenization/GensimWordTokenizer.rst
+++ /dev/null
@@ -1,20 +0,0 @@
-GensimWordTokenizer
-=====================
-
-此令牌解析器在默认情况下对传入的item中的图片、题目空缺符等部分转换成特殊字符进行保护，从而对文本、公式、标签、分隔符进行令牌化操作。此外，从令牌化方法而言，此令牌解析器对文本均采用线性的分析方法，而对公式采用抽象语法树的分析方法，提供了general参数可供使用者选择：当general为true的时候则代表着传入的item并非标准格式，此时对公式也使用线性的分析方法；当general为false时则代表使用抽象语法树的方法对公式进行解析。
-
-Examples
-----------
-        
-::
-
-        >>> tokenizer = GensimWordTokenizer(symbol="gmas", general=True)
-        >>> token_item = tokenizer("有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
-        ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$")
-        >>> print(token_item.tokens[:10])
-        ['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]']
-        >>> tokenizer = GensimWordTokenizer(symbol="fgmas", general=False)
-        >>> token_item = tokenizer("有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
-        ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$")
-        >>> print(token_item.tokens[:10])
-        ['公式', '[FORMULA]', '如图', '[FIGURE]', '[FORMULA]', '约束条件', '公式', '[FORMULA]', '[SEP]', '[FORMULA]']
diff --git a/docs/source/tutorial/zh/tokenization/PureTextTokenizer.rst b/docs/source/tutorial/zh/tokenization/PureTextTokenizer.rst
deleted file mode 100644
index 12181e94..00000000
--- a/docs/source/tutorial/zh/tokenization/PureTextTokenizer.rst
+++ /dev/null
@@ -1,31 +0,0 @@
-PureTextTokenizer
-================
-
-即纯净型文本令牌解析器，在默认情况下对传入的item中的图片、标签、分隔符、题目空缺符等部分则转换成特殊字符进行保护，并对特殊公式(例如：$\\FormFigureID{...}$， $\\FormFigureBase64{...}$)进行筛除，从而对文本、纯文本公式进行令牌化操作。此外，此令牌解析器对文本、公式均采用线性的分析方法，并提供的key参数用于对传入的item进行预处理，待未来根据需求进行开发。
-
-Examples
-----------
-
-::
-
-    >>> tokenizer = PureTextTokenizer()
-    >>> items = ["有公式$\\FormFigureID{wrong1?}$，如图$\\FigureID{088f15ea-xxx}$,\
-    ... 若$x,y$满足约束条件公式$\\FormFigureBase64{wrong2?}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$"]
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)[:10]
-    ['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z']
-    >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
-    >>> items = [{
-    ... "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
-    ... "options": ["1", "2"]
-    ... }]
-    >>> tokens = tokenizer(items, key=lambda x: x["stem"])
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
diff --git a/docs/source/tutorial/zh/tokenization/TextTokenizer.rst b/docs/source/tutorial/zh/tokenization/TextTokenizer.rst
deleted file mode 100644
index a17de29b..00000000
--- a/docs/source/tutorial/zh/tokenization/TextTokenizer.rst
+++ /dev/null
@@ -1,27 +0,0 @@
-TextTokenizer
-================
-
-即文本令牌解析器，在默认情况下对传入的item中的图片、标签、分隔符、题目空缺符等部分则转换成特殊字符进行保护，从而对文本、公式进行令牌化操作。此外，此令牌解析器对文本、公式均采用线性的分析方法，并提供的key参数用于对传入的item进行预处理，待未来根据需求进行开发。
-
-
-Examples
-----------
-
-::
-
-    >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-    >>> tokenizer = TextTokenizer()
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
-    >>> items = [{
-    ... "stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$",
-    ... "options": ["1", "2"]
-    ... }]
-    >>> tokens = tokenizer(items, key=lambda x: x["stem"])
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
diff --git "a/docs/source/tutorial/zh/tokenize/\344\273\244\347\211\214\345\214\226.rst" "b/docs/source/tutorial/zh/tokenize/\344\273\244\347\211\214\345\214\226.rst"
deleted file mode 100644
index 230aa200..00000000
--- "a/docs/source/tutorial/zh/tokenize/\344\273\244\347\211\214\345\214\226.rst"
+++ /dev/null
@@ -1,29 +0,0 @@
-令牌化
--------
-即综合解析，将带公式的句子切分为若干标记的过程。每个标记为一个“令牌”（token）。
-我们提供了多种已经封装好的令牌化器供用户便捷调用，下面是一个示例:
-
-Examples
-    
-::
-
-    >>> items = ["已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$"]
-    >>> tokenizer = TextTokenizer()
-    >>> tokens = tokenizer(items)
-    >>> next(tokens)  # doctest: +NORMALIZE_WHITESPACE
-    ['已知', '集合', 'A', '=', '\\left', '\\{', 'x', '\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<',
-    '0', '\\right', '\\}', ',', '\\quad', 'B', '=', '\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\}', ',',
-    '\\quad', 'A', '\\cap', 'B', '=']
-
-
-
-通过查看 ``./EduNLP/Tokenizer/tokenizer.py`` 及 ``./EduNLP/Pretrain/gensim_vec.py`` 可以查看更多令牌化器，下面是一个完整的令牌化器列表
-
-.. toctree::
-  :maxdepth: 1
-  :titlesonly:
-
-  ../tokenization/TextTokenizer
-  ../tokenization/PureTextTokenizer
-  ../tokenization/GensimSegTokenizer
-  ../tokenization/GensimWordTokenizer
diff --git "a/docs/source/tutorial/zh/tokenize/\345\210\206\345\217\245.rst" "b/docs/source/tutorial/zh/tokenize/\345\210\206\345\217\245.rst"
deleted file mode 100644
index 67cf5679..00000000
--- "a/docs/source/tutorial/zh/tokenize/\345\210\206\345\217\245.rst"
+++ /dev/null
@@ -1,4 +0,0 @@
-分句
--------
-
-将较长的文档切分成若干句子的过程称为“分句”。每个句子为一个“令牌”（token）（待实现）。
diff --git "a/docs/source/tutorial/zh/tokenize/\345\210\206\350\257\215.rst" "b/docs/source/tutorial/zh/tokenize/\345\210\206\350\257\215.rst"
deleted file mode 100644
index ec75b0cd..00000000
--- "a/docs/source/tutorial/zh/tokenize/\345\210\206\350\257\215.rst"
+++ /dev/null
@@ -1,36 +0,0 @@
-分词
--------
-
-词解析（text-tokenization）：一个句子（不含公式）是由若干“词”按顺序构成的，将一个句子切分为若干词的过程称为“词解析”。根据词的粒度大小，又可细分为“词组解析”和"单字解析"。
-
-::
-
-    - 词组解析 (word-tokenization)：每一个词组为一个“令牌”（token）。
-    
-    - 单字解析 (char-tokenization)：单个字符即为一个“令牌”（token）。
-    
-
-词解析分为两个主要步骤：
-
-1. 分词：  
-
-    - 词组解析：使用分词工具切分并提取题目文本中的词。本项目目前支持的分词工具有：`jieba`
-
-    - 单字解析：按字符划分。
-
-2. 筛选：过滤指定的停用词。   
-
-    本项目默认使用的停用词表：`[stopwords] <https://github.com/bigdata-ustc/EduNLP/blob/master/EduNLP/meta_data/sif_stopwords.txt>`_  
-    你也可以使用自己的停用词表，具体使用方法见下面的示例。
-
-Examples：
-
-::
-    
-    >>> text = "三角函数是基本初等函数之一"
-    >>> tokenize(text, granularity="word")
-    ['三角函数', '初等', '函数']
-    
-    >>> tokenize(text, granularity="char")
-    ['三', '角', '函', '数', '基', '初', '函', '数']
-    
diff --git a/docs/source/tutorial/zh/vectorization.rst b/docs/source/tutorial/zh/vectorization.rst
index 8383c93d..9349b91e 100644
--- a/docs/source/tutorial/zh/vectorization.rst
+++ b/docs/source/tutorial/zh/vectorization.rst
@@ -55,6 +55,8 @@ I2V 向量化容器
 +--------------------+------------------------+
 |    bert_taledu_768 |         数学           |
 +--------------------+------------------------+
+|    bert_math_ptc |         数学           |
++--------------------+------------------------+
 |    disenq_math_256 |         数学           |
 +--------------------+------------------------+
 |    quesnet_math_512|         数学           |
diff --git "a/docs/source/tutorial/zh/vectorization/\344\270\215\344\275\277\347\224\250\351\242\204\350\256\255\347\273\203\346\250\241\345\236\213.rst" "b/docs/source/tutorial/zh/vectorization/\344\270\215\344\275\277\347\224\250\351\242\204\350\256\255\347\273\203\346\250\241\345\236\213.rst"
deleted file mode 100644
index 2a001b61..00000000
--- "a/docs/source/tutorial/zh/vectorization/\344\270\215\344\275\277\347\224\250\351\242\204\350\256\255\347\273\203\346\250\241\345\236\213.rst"
+++ /dev/null
@@ -1,22 +0,0 @@
-不使用预训练模型:直接调用D2V
-------------------------------------
-
-使用自己提供的任一预训练模型（给出模型存放路径即可）将给定的题目文本转成向量。
-
-* 优点：可以使用自己的模型，另可调整训练参数，灵活性强。
-
-
-处理的具体流程
-++++++++++++++++++++
-
-1.调用get_tokenizer函数，得到经过分词后的结果；
-
-2.调用D2V或W2V等模块，根据需要选择是否使用预训练的t2v模型
-
-Examples：
-
-::
-
-  >>> model_path = "../test_model/d2v/test_gensim_luna_stem_tf_d2v_256.bin"
-  >>> i2v = D2V("text","d2v",filepath=model_path, pretrained_t2v = False)
-  >>> i2v(item)
diff --git "a/docs/source/tutorial/zh/vectorization/\344\275\277\347\224\250\351\242\204\350\256\255\347\273\203\346\250\241\345\236\213.rst" "b/docs/source/tutorial/zh/vectorization/\344\275\277\347\224\250\351\242\204\350\256\255\347\273\203\346\250\241\345\236\213.rst"
deleted file mode 100644
index 66a7d776..00000000
--- "a/docs/source/tutorial/zh/vectorization/\344\275\277\347\224\250\351\242\204\350\256\255\347\273\203\346\250\241\345\236\213.rst"
+++ /dev/null
@@ -1,41 +0,0 @@
-使用预训练模型：直接调用get_pretrained_i2v
----------------------------------------------
-
-使用 EduNLP 项目组给定的预训练模型将给定的题目文本转成向量。
-
-* 优点：简单方便。
-
-* 缺点：只能使用项目中给定的模型，局限性较大。
-
-* 调用此函数即可获得相应的预训练模型，目前提供以下的预训练模型：d2v_all_300、d2v_science_300、d2v_english_300、d2v_literal_300
-
-模型选择与使用
-##################
-
-根据题目所属学科选择预训练模型：
-
-+--------------------+------------------------+
-|    预训练模型名称  | 模型训练数据的所属学科 |
-+====================+========================+
-|    d2v_all_300     |        全学科          |
-+--------------------+------------------------+
-|    d2v_science_300     |         理科           |
-+--------------------+------------------------+
-|    d2v_literal_300     |         文科           |
-+--------------------+------------------------+
-|    d2v_english_300     |         英语           |
-+--------------------+------------------------+
-
-处理的具体流程
-##################
-
-1.下载相应的预处理模型
-
-2.将所得到的模型传入D2V，使用D2V进行处理
-
-Examples：
-
-::
-
-  >>> i2v = get_pretrained_i2v("d2v_science_300")
-  >>> i2v(item)
diff --git a/docs/tutorial.ipynb b/docs/tutorial.ipynb
index b85ad7e6..92a2144b 100644
--- a/docs/tutorial.ipynb
+++ b/docs/tutorial.ipynb
@@ -2,6 +2,12 @@
  "cells": [
   {
    "cell_type": "markdown",
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   },
    "source": [
     "# EduNLP\n",
     "\n",
@@ -42,72 +48,72 @@
     "In addition, we will try to covert xxx to UER automatically if it is possible.\n",
     "\n",
     "#### Syntax Check"
-   ],
-   "metadata": {
-    "collapsed": false,
-    "pycharm": {
-     "name": "#%% md\n"
-    }
-   }
+   ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "outputs": [],
-   "source": [
-    "en_ex1 = \"\""
-   ],
    "metadata": {
     "collapsed": false,
     "pycharm": {
      "name": "#%%\n"
     }
-   }
+   },
+   "outputs": [],
+   "source": [
+    "en_ex1 = \"\""
+   ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "outputs": [],
-   "source": [
-    "en_ex2 = \"\""
-   ],
    "metadata": {
     "collapsed": false,
     "pycharm": {
      "name": "#%%\n"
     }
-   }
+   },
+   "outputs": [],
+   "source": [
+    "en_ex2 = \"\""
+   ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "outputs": [],
-   "source": [
-    "ch_ex1 = \"\""
-   ],
    "metadata": {
     "collapsed": false,
     "pycharm": {
      "name": "#%%\n"
     }
-   }
+   },
+   "outputs": [],
+   "source": [
+    "ch_ex1 = \"\""
+   ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "outputs": [],
-   "source": [
-    "ch_ex2 = \"\""
-   ],
    "metadata": {
     "collapsed": false,
     "pycharm": {
      "name": "#%%\n"
     }
-   }
+   },
+   "outputs": [],
+   "source": [
+    "ch_ex2 = \"\""
+   ]
   },
   {
    "cell_type": "markdown",
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   },
    "source": [
     "#### Syntax Correction\n",
     "We focus on handling these situations:\n",
@@ -125,34 +131,28 @@
     "#### Syntax of USR\n",
     "\n",
     "#### Example"
-   ],
-   "metadata": {
-    "collapsed": false,
-    "pycharm": {
-     "name": "#%% md\n"
-    }
-   }
+   ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "outputs": [],
-   "source": [
-    "eq1 = \"y=x^2 + 1\"\n",
-    "# $ will be automatically ignored\n",
-    "eq2 = \"$y = x^2 + 1$\""
-   ],
    "metadata": {
     "collapsed": false,
     "pycharm": {
      "name": "#%%\n"
     }
-   }
+   },
+   "outputs": [],
+   "source": [
+    "eq1 = \"y=x^2 + 1\"\n",
+    "# $ will be automatically ignored\n",
+    "eq2 = \"$y = x^2 + 1$\""
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3.10.4 64-bit",
    "language": "python",
    "name": "python3"
   },
@@ -166,9 +166,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython2",
-   "version": "2.7.6"
+   "version": "3.10.4"
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
   }
  },
  "nbformat": 4,
  "nbformat_minor": 0
-}
\ No newline at end of file
+}
diff --git a/examples/pipeline/pipeline.ipynb b/examples/pipeline/pipeline.ipynb
new file mode 100644
index 00000000..193a87a1
--- /dev/null
+++ b/examples/pipeline/pipeline.ipynb
@@ -0,0 +1,296 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "collapsed": false
+   },
+   "source": [
+    "# 流水线\n",
+    "\n",
+    "流水线由文档预处理和任务推理两部分组成，使用<u>pipeline()</u>轻松构建流水线，本示例将展示：\n",
+    "* 仅对文档进行预处理\n",
+    "* 直接对文档应用任务推理\n",
+    "* 先对文档进行预处理，之后再应用任务推理"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from EduNLP.Pipeline import pipeline"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 仅进行预处理"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "预处理流水线提供了一系列针对SIF处理和成分分解的组件，并且允许自定义组件。这些组件可以在流水线中按顺序调用。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "item = \"如图所示，则三角形ABC的面积是_。\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "我们提供了一些常用的管道，您可以在初始化流水线时通过名称来构建。\n",
+    "（注意，初始化时构建的管道实例无法为其指定参数）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "processor = pipeline(preprocess=['is_sif', 'to_sif', 'is_sif', 'seg_describe'])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "也可以通过插入的方式修改流水线，以此种方式可以为管道传入参数，例如："
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "processor.add_pipe(name='seg', symbol='fm', before='seg_describe')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "这在流水线中`seg_describe`组件之前插入了一个`seg`管道，并且指定了参数为`symbol='fm'`"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "查看流水线中所有组件内容："
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['is_sif', 'to_sif', 'is_sif', 'seg', 'seg_describe']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(processor.component_names)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "应用流水线对文档进行处理："
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "False\n",
+      "True\n",
+      "{'t': 3, 'f': 1, 'g': 0, 'm': 1}\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "<bound method Kernel.raw_input of <ipykernel.ipkernel.IPythonKernel object at 0x7ff65898ab80>>"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "processor(item)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 直接应用任务推理"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "通过指定应用任务名称，使用默认模型来进行任务推理。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "processor = pipeline(task=\"property-prediction\")\n",
+    "processor(item)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "通过指定应用任务名称，使用自定义模型来进行任务推理。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from EduNLP.ModelZoo.rnn import ElmoLMForPropertyPrediction\n",
+    "from EduNLP.Pretrain import ElmoTokenizer"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "自定义模型准备。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "[EduNLP, INFO] All the weights of ElmoLMForPropertyPrediction were initialized from the model checkpoint at examples/test_model/elmo/elmo_pp.\n",
+      "If your task is similar to the task the model of the checkpoint was trained on, you can already use ElmoLMForPropertyPrediction for predictions without further training.\n"
+     ]
+    }
+   ],
+   "source": [
+    "pretrained_pp_dir = f\"examples/test_model/elmo/elmo_pp\"\n",
+    "tokenizer = ElmoTokenizer.from_pretrained(pretrained_pp_dir)\n",
+    "model = ElmoLMForPropertyPrediction.from_pretrained(pretrained_pp_dir)\n",
+    "model.eval()\n",
+    "text='有公式$\\\\FormFigureID{wrong1?}$和公式$\\\\FormFigureBase64{wrong2?}$，如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[{'property': 0.4843716621398926}, {'property': 0.4843716621398926}]\n"
+     ]
+    },
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "/Users/lipingzhi/Desktop/nnnyt/EduNLP/EduNLP/ModelZoo/rnn/rnn.py:354: UserWarning: To copy construct from a tensor, it is recommended to use sourceTensor.clone().detach() or sourceTensor.clone().detach().requires_grad_(True), rather than torch.tensor(sourceTensor).\n",
+      "  (outputs.forward_output[torch.arange(len(seq_len)), torch.tensor(seq_len) - 1],\n"
+     ]
+    }
+   ],
+   "source": [
+    "pl=pipeline(task='property-prediction', model=model, tokenizer=tokenizer)\n",
+    "print(pl([text, text]))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 预处理与任务推理结合"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "基本是上面两部分的顺序组合，例如："
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "processor = pipeline(task=\"property-prediction\", preprocess=['is_sif', 'to_sif', 'is_sif', 'seg_describe'])\n",
+    "processor(item)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3.6.13 ('py36')",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.13"
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "672c49ef5d0c797ca83477c465883c954b68a3ad2765b748855bc549ed895b7b"
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
diff --git a/examples/pretrain/bert.ipynb b/examples/pretrain/bert.ipynb
index 3af9c56c..f1a69cbb 100644
--- a/examples/pretrain/bert.ipynb
+++ b/examples/pretrain/bert.ipynb
@@ -2,25 +2,17 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 13,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "d:\\MySoftwares\\Anaconda\\envs\\data\\lib\\site-packages\\gensim\\similarities\\__init__.py:15: UserWarning: The gensim.similarities.levenshtein submodule is disabled, because the optional Levenshtein package <https://pypi.org/project/python-Levenshtein/> is unavailable. Install Levenhstein (e.g. `pip install python-Levenshtein`) to suppress this warning.\n",
-      "  warnings.warn(msg)\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "import torch\n",
     "import numpy as np\n",
     "import os\n",
     "import json\n",
+    "from transformers import BertModel as HFBertModel\n",
     "from EduNLP.Pretrain import BertTokenizer, finetune_bert\n",
-    "from EduNLP.Vector import T2V\n",
+    "from EduNLP.Vector import T2V, BertModel\n",
     "from EduNLP.I2V import Bert, get_pretrained_i2v\n",
     "\n",
     "import os\n",
@@ -45,7 +37,7 @@
     "BASE_DIR = \"../..\"\n",
     "\n",
     "data_dir = f\"{BASE_DIR}/static/test_data\"\n",
-    "output_dir = f\"{BASE_DIR}/examples/test_model/data/data/bert\""
+    "output_dir = f\"{BASE_DIR}/examples/test_model/data/pretrain_test_models/bert\""
    ]
   },
   {
@@ -54,26 +46,15 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "def raw_data():\n",
+    "def stem_data():\n",
     "    _data = []\n",
-    "    data_path = os.path.join(data_dir, \"OpenLUNA.json\")\n",
+    "    data_path = os.path.join(data_dir, \"standard_luna_data.json\")\n",
     "    with open(data_path, encoding=\"utf-8\") as f:\n",
     "        for line in f.readlines():\n",
     "            _data.append(json.loads(line))\n",
     "    return _data\n",
     "\n",
-    "def stem_data(data):\n",
-    "    _data = []\n",
-    "    tokenizer = BertTokenizer()\n",
-    "    for e in data:\n",
-    "        d = tokenizer(e[\"stem\"])\n",
-    "        if d is not None:\n",
-    "            _data.append(d)\n",
-    "    assert _data\n",
-    "    return _data\n",
-    "\n",
-    "raw_data = raw_data()\n",
-    "train_items = stem_data(raw_data)"
+    "train_items = stem_data()"
    ]
   },
   {
@@ -85,294 +66,129 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
      "name": "stderr",
      "output_type": "stream",
      "text": [
+      "The tokenizer class you load from this checkpoint is not the same type as the class this function is called from. It may result in unexpected tokenization. \n",
+      "The tokenizer class you load from this checkpoint is 'BertTokenizer'. \n",
+      "The class this function is called from is 'EduTokenizerForBert'.\n",
       "Some weights of the model checkpoint at bert-base-chinese were not used when initializing BertForMaskedLM: ['cls.seq_relationship.weight', 'cls.seq_relationship.bias']\n",
       "- This IS expected if you are initializing BertForMaskedLM from the checkpoint of a model trained on another task or with another architecture (e.g. initializing a BertForSequenceClassification model from a BertForPreTraining model).\n",
-      "- This IS NOT expected if you are initializing BertForMaskedLM from the checkpoint of a model that you expect to be exactly identical (initializing a BertForSequenceClassification model from a BertForSequenceClassification model).\n",
-      "Using the `WAND_DISABLED` environment variable is deprecated and will be removed in v5. Use the --report_to flag to control the integrations used for logging result (for instance --report_to none).\n",
-      "***** Running training *****\n",
-      "  Num examples = 50\n",
-      "  Num Epochs = 1\n",
-      "  Instantaneous batch size per device = 1\n",
-      "  Total train batch size (w. parallel, distributed & accumulation) = 1\n",
-      "  Gradient Accumulation steps = 1\n",
-      "  Total optimization steps = 50\n",
-      " 10%|█         | 5/50 [00:00<00:05,  8.26it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.5967, 'learning_rate': 4.7e-05, 'epoch': 0.06}\n"
+      "- This IS NOT expected if you are initializing BertForMaskedLM from the checkpoint of a model that you expect to be exactly identical (initializing a BertForSequenceClassification model from a BertForSequenceClassification model).\n"
      ]
     },
     {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 14%|█▍        | 7/50 [00:00<00:04,  9.09it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.9648, 'learning_rate': 4.4000000000000006e-05, 'epoch': 0.12}\n"
-     ]
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "a529272c41a049ac8d24313d8023a09b",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "  0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
     },
     {
      "name": "stderr",
      "output_type": "stream",
      "text": [
-      " 22%|██▏       | 11/50 [00:01<00:03, 10.18it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 4.4029, 'learning_rate': 4.1e-05, 'epoch': 0.18}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 26%|██▌       | 13/50 [00:01<00:03, 10.49it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.8761, 'learning_rate': 3.8e-05, 'epoch': 0.24}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 34%|███▍      | 17/50 [00:01<00:02, 11.02it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.0214, 'learning_rate': 3.5e-05, 'epoch': 0.3}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 38%|███▊      | 19/50 [00:01<00:02, 10.86it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 2.0055, 'learning_rate': 3.2000000000000005e-05, 'epoch': 0.36}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 46%|████▌     | 23/50 [00:02<00:02, 11.17it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 2.7323, 'learning_rate': 2.9e-05, 'epoch': 0.42}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 50%|█████     | 25/50 [00:02<00:02, 11.36it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.6171, 'learning_rate': 2.6000000000000002e-05, 'epoch': 0.48}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 54%|█████▍    | 27/50 [00:02<00:02, 11.26it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 3.3698, 'learning_rate': 2.3000000000000003e-05, 'epoch': 0.54}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 62%|██████▏   | 31/50 [00:03<00:01, 10.78it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.5574, 'learning_rate': 2e-05, 'epoch': 0.6}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 70%|███████   | 35/50 [00:03<00:01, 11.47it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 2.0541, 'learning_rate': 1.7000000000000003e-05, 'epoch': 0.66}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 74%|███████▍  | 37/50 [00:03<00:01, 11.28it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 2.0624, 'learning_rate': 1.4000000000000001e-05, 'epoch': 0.72}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 82%|████████▏ | 41/50 [00:03<00:00, 11.33it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 2.8201, 'learning_rate': 1.1000000000000001e-05, 'epoch': 0.78}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 86%|████████▌ | 43/50 [00:04<00:00, 11.44it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 1.5396, 'learning_rate': 8.000000000000001e-06, 'epoch': 0.84}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 94%|█████████▍| 47/50 [00:04<00:00, 11.66it/s]"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 3.2493, 'learning_rate': 5e-06, 'epoch': 0.9}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      " 98%|█████████▊| 49/50 [00:04<00:00, 10.19it/s]Saving model checkpoint to ../../examples/test_model/data/data/bert\\checkpoint-50\n",
-      "Configuration saved in ../../examples/test_model/data/data/bert\\checkpoint-50\\config.json\n"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'loss': 2.4102, 'learning_rate': 2.0000000000000003e-06, 'epoch': 0.96}\n"
-     ]
+      "Using the `WAND_DISABLED` environment variable is deprecated and will be removed in v5. Use the --report_to flag to control the integrations used for logging result (for instance --report_to none).\n",
+      "/home/qlh/anaconda3/envs/dev/lib/python3.6/site-packages/transformers/optimization.py:309: FutureWarning: This implementation of AdamW is deprecated and will be removed in a future version. Use the PyTorch implementation torch.optim.AdamW instead, or set `no_deprecation_warning=True` to disable this warning\n",
+      "  FutureWarning,\n",
+      "***** Running training *****\n",
+      "  Num examples = 25\n",
+      "  Num Epochs = 1\n",
+      "  Instantaneous batch size per device = 1\n",
+      "  Total train batch size (w. parallel, distributed & accumulation) = 2\n",
+      "  Gradient Accumulation steps = 1\n",
+      "  Total optimization steps = 13\n",
+      "/home/qlh/anaconda3/envs/dev/lib/python3.6/site-packages/torch/nn/parallel/_functions.py:65: UserWarning: Was asked to gather along dimension 0, but all input tensors were scalars; will instead unsqueeze and return a vector.\n",
+      "  warnings.warn('Was asked to gather along dimension 0, but all '\n"
+     ]
+    },
+    {
+     "data": {
+      "text/html": [
+       "\n",
+       "    <div>\n",
+       "      \n",
+       "      <progress value='13' max='13' style='width:300px; height:20px; vertical-align: middle;'></progress>\n",
+       "      [13/13 00:02, Epoch 1/1]\n",
+       "    </div>\n",
+       "    <table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       " <tr style=\"text-align: left;\">\n",
+       "      <th>Step</th>\n",
+       "      <th>Training Loss</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <td>3</td>\n",
+       "      <td>4.236200</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <td>6</td>\n",
+       "      <td>3.176300</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <td>9</td>\n",
+       "      <td>1.507000</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <td>12</td>\n",
+       "      <td>1.878000</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table><p>"
+      ],
+      "text/plain": [
+       "<IPython.core.display.HTML object>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
     },
     {
      "name": "stderr",
      "output_type": "stream",
      "text": [
-      "Model weights saved in ../../examples/test_model/data/data/bert\\checkpoint-50\\pytorch_model.bin\n",
-      "tokenizer config file saved in ../../examples/test_model/data/data/bert\\checkpoint-50\\tokenizer_config.json\n",
-      "Special tokens file saved in ../../examples/test_model/data/data/bert\\checkpoint-50\\special_tokens_map.json\n",
-      "Deleting older checkpoint [..\\..\\examples\\test_model/data\\data\\bert\\checkpoint-5] due to args.save_total_limit\n",
       "\n",
       "\n",
       "Training completed. Do not forget to share your model on huggingface.co/models =)\n",
       "\n",
       "\n",
-      "100%|██████████| 50/50 [00:07<00:00,  6.26it/s]\n",
-      "Saving model checkpoint to ../../examples/test_model/data/data/bert\n",
-      "Configuration saved in ../../examples/test_model/data/data/bert\\config.json\n"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "{'train_runtime': 8.0115, 'train_samples_per_second': 6.241, 'train_steps_per_second': 6.241, 'train_loss': 2.197276794910431, 'epoch': 1.0}\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "Model weights saved in ../../examples/test_model/data/data/bert\\pytorch_model.bin\n",
-      "tokenizer config file saved in ../../examples/test_model/data/data/bert\\tokenizer_config.json\n",
-      "Special tokens file saved in ../../examples/test_model/data/data/bert\\special_tokens_map.json\n",
-      "tokenizer config file saved in ../../examples/test_model/data/data/bert\\tokenizer_config.json\n",
-      "Special tokens file saved in ../../examples/test_model/data/data/bert\\special_tokens_map.json\n"
+      "Saving model checkpoint to ../../examples/test_model/data/pretrain_test_models/bert\n",
+      "Configuration saved in ../../examples/test_model/data/pretrain_test_models/bert/config.json\n",
+      "Model weights saved in ../../examples/test_model/data/pretrain_test_models/bert/pytorch_model.bin\n",
+      "tokenizer config file saved in ../../examples/test_model/data/pretrain_test_models/bert/tokenizer_config.json\n",
+      "Special tokens file saved in ../../examples/test_model/data/pretrain_test_models/bert/special_tokens_map.json\n",
+      "added tokens file saved in ../../examples/test_model/data/pretrain_test_models/bert/added_tokens.json\n"
      ]
     }
    ],
    "source": [
     "# 自定义训练参数\n",
     "train_params = {\n",
-    "  'epochs': 1,\n",
+    "  'num_train_epochs': 1,\n",
     "  'save_steps': 50,\n",
-    "  'batch_size': 1,\n",
+    "  'per_device_train_batch_size': 1,\n",
     "  'logging_steps': 3\n",
     "}\n",
     "\n",
     "finetune_bert(\n",
-    "  train_items[:50],\n",
+    "  train_items,\n",
     "  output_dir,\n",
+    "  data_params={\n",
+    "      \"stem_key\": \"ques_content\",\n",
+    "  },\n",
     "  train_params=train_params\n",
     ")"
    ]
@@ -381,21 +197,148 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## 3.使用模型\n",
+    "## 3.使用模型"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "test_items = [\n",
+    "    {'ques_content': '有公式$\\\\FormFigureID{wrong1?}$和公式$\\\\FormFigureBase64{wrong2?}$，\\\n",
+    "            如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\\\n",
+    "            若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'},\n",
+    "    {'ques_content': '如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \\\n",
+    "            若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'}\n",
+    "]"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### 3.1 直接加载令牌容器和模型"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "loading configuration file ../../examples/test_model/data/pretrain_test_models/bert/config.json\n",
+      "Model config BertConfig {\n",
+      "  \"_name_or_path\": \"bert-base-chinese\",\n",
+      "  \"architectures\": [\n",
+      "    \"BertForMaskedLM\"\n",
+      "  ],\n",
+      "  \"attention_probs_dropout_prob\": 0.1,\n",
+      "  \"classifier_dropout\": null,\n",
+      "  \"directionality\": \"bidi\",\n",
+      "  \"hidden_act\": \"gelu\",\n",
+      "  \"hidden_dropout_prob\": 0.1,\n",
+      "  \"hidden_size\": 768,\n",
+      "  \"initializer_range\": 0.02,\n",
+      "  \"intermediate_size\": 3072,\n",
+      "  \"layer_norm_eps\": 1e-12,\n",
+      "  \"max_position_embeddings\": 512,\n",
+      "  \"model_type\": \"bert\",\n",
+      "  \"num_attention_heads\": 12,\n",
+      "  \"num_hidden_layers\": 12,\n",
+      "  \"pad_token_id\": 0,\n",
+      "  \"pooler_fc_size\": 768,\n",
+      "  \"pooler_num_attention_heads\": 12,\n",
+      "  \"pooler_num_fc_layers\": 3,\n",
+      "  \"pooler_size_per_head\": 128,\n",
+      "  \"pooler_type\": \"first_token_transform\",\n",
+      "  \"position_embedding_type\": \"absolute\",\n",
+      "  \"torch_dtype\": \"float32\",\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"type_vocab_size\": 2,\n",
+      "  \"use_cache\": true,\n",
+      "  \"vocab_size\": 21137\n",
+      "}\n",
+      "\n",
+      "loading weights file ../../examples/test_model/data/pretrain_test_models/bert/pytorch_model.bin\n",
+      "Some weights of the model checkpoint at ../../examples/test_model/data/pretrain_test_models/bert were not used when initializing BertModel: ['cls.predictions.transform.dense.weight', 'cls.predictions.transform.LayerNorm.bias', 'cls.predictions.transform.LayerNorm.weight', 'cls.predictions.transform.dense.bias', 'cls.predictions.decoder.weight', 'cls.predictions.decoder.bias', 'cls.predictions.bias']\n",
+      "- This IS expected if you are initializing BertModel from the checkpoint of a model trained on another task or with another architecture (e.g. initializing a BertForSequenceClassification model from a BertForPreTraining model).\n",
+      "- This IS NOT expected if you are initializing BertModel from the checkpoint of a model that you expect to be exactly identical (initializing a BertForSequenceClassification model from a BertForSequenceClassification model).\n",
+      "Some weights of BertModel were not initialized from the model checkpoint at ../../examples/test_model/data/pretrain_test_models/bert and are newly initialized: ['bert.pooler.dense.weight', 'bert.pooler.dense.bias']\n",
+      "You should probably TRAIN this model on a down-stream task to be able to use it for predictions and inference.\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/vocab.txt\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/added_tokens.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/special_tokens_map.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/tokenizer_config.json\n",
+      "Adding [TEXT] to the vocabulary\n",
+      "Adding [FORMULA] to the vocabulary\n",
+      "Adding [FIGURE] to the vocabulary\n",
+      "Adding [MARK] to the vocabulary\n",
+      "Adding [TAG] to the vocabulary\n",
+      "Adding [TEXT_BEGIN] to the vocabulary\n",
+      "Adding [TEXT_END] to the vocabulary\n",
+      "Adding [FORMULA_BEGIN] to the vocabulary\n",
+      "Adding [FORMULA_END] to the vocabulary\n",
+      "Assigning ['[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]'] to the additional_special_tokens key of the tokenizer\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "BaseModelOutputWithPoolingAndCrossAttentions([('last_hidden_state',\n",
+       "                                               tensor([[[ 0.4089,  1.0626,  0.0125,  ...,  0.9473, -1.1455, -0.1160],\n",
+       "                                                        [-0.5247,  0.2449, -0.2175,  ..., -0.0708, -0.4598, -0.3746],\n",
+       "                                                        [-0.5054,  0.5353, -0.9247,  ...,  1.1696,  0.0792, -0.3338],\n",
+       "                                                        ...,\n",
+       "                                                        [-0.1391,  0.0392, -0.8276,  ...,  0.9213, -0.1554, -0.2917],\n",
+       "                                                        [ 0.5237,  0.2678,  0.6923,  ...,  0.1681, -0.9408, -0.2269],\n",
+       "                                                        [ 0.3768,  0.2677,  0.3381,  ...,  0.9611, -2.1952, -0.0641]],\n",
+       "                                               \n",
+       "                                                       [[ 0.3635,  1.0077,  0.0537,  ...,  0.8781, -1.2010, -0.1730],\n",
+       "                                                        [-0.4258,  0.3437, -0.1443,  ..., -0.0933, -0.3453, -0.3237],\n",
+       "                                                        [ 0.1931, -0.2688,  0.8572,  ...,  1.2704, -0.6482, -0.4281],\n",
+       "                                                        ...,\n",
+       "                                                        [ 0.4101,  0.1993,  0.5072,  ...,  0.8726, -2.0718, -0.1272],\n",
+       "                                                        [ 0.6080,  0.2398,  0.9711,  ...,  0.4306, -1.1894, -0.3648],\n",
+       "                                                        [ 0.2173,  0.1151,  1.1694,  ...,  0.6153, -1.1397, -0.2648]]],\n",
+       "                                                      grad_fn=<NativeLayerNormBackward>)),\n",
+       "                                              ('pooler_output',\n",
+       "                                               tensor([[ 0.4122, -0.3051, -0.0791,  ...,  0.3698, -0.4794, -0.4627],\n",
+       "                                                       [ 0.4386, -0.2620, -0.0524,  ...,  0.3713, -0.4795, -0.3963]],\n",
+       "                                                      grad_fn=<TanhBackward>))])"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "pretrained_model_dir = output_dir\n",
+    "\n",
+    "model = HFBertModel.from_pretrained(pretrained_model_dir)\n",
+    "tokenizer = BertTokenizer.from_pretrained(pretrained_model_dir)\n",
     "\n",
-    "### 3.1 使用训练好的Bert模型"
+    "encodes = tokenizer(test_items[0], lambda x: x['ques_content'])\n",
+    "model(**encodes)\n",
+    "encodes = tokenizer(test_items, lambda x: x['ques_content'])\n",
+    "model(**encodes)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
      "name": "stderr",
      "output_type": "stream",
      "text": [
-      "loading configuration file ../../examples/test_model/data/data/bert\\config.json\n",
+      "loading configuration file ../../examples/test_model/data/pretrain_test_models/bert/config.json\n",
       "Model config BertConfig {\n",
       "  \"_name_or_path\": \"bert-base-chinese\",\n",
       "  \"architectures\": [\n",
@@ -422,23 +365,32 @@
       "  \"pooler_type\": \"first_token_transform\",\n",
       "  \"position_embedding_type\": \"absolute\",\n",
       "  \"torch_dtype\": \"float32\",\n",
-      "  \"transformers_version\": \"4.11.3\",\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
       "  \"type_vocab_size\": 2,\n",
       "  \"use_cache\": true,\n",
-      "  \"vocab_size\": 21132\n",
+      "  \"vocab_size\": 21137\n",
       "}\n",
       "\n",
-      "loading weights file ../../examples/test_model/data/data/bert\\pytorch_model.bin\n",
-      "Some weights of the model checkpoint at ../../examples/test_model/data/data/bert were not used when initializing BertModel: ['cls.predictions.transform.LayerNorm.weight', 'cls.predictions.bias', 'cls.predictions.transform.dense.bias', 'cls.predictions.decoder.weight', 'cls.predictions.transform.LayerNorm.bias', 'cls.predictions.transform.dense.weight', 'cls.predictions.decoder.bias']\n",
+      "loading weights file ../../examples/test_model/data/pretrain_test_models/bert/pytorch_model.bin\n",
+      "Some weights of the model checkpoint at ../../examples/test_model/data/pretrain_test_models/bert were not used when initializing BertModel: ['cls.predictions.transform.dense.weight', 'cls.predictions.transform.LayerNorm.bias', 'cls.predictions.transform.LayerNorm.weight', 'cls.predictions.transform.dense.bias', 'cls.predictions.decoder.weight', 'cls.predictions.decoder.bias', 'cls.predictions.bias']\n",
       "- This IS expected if you are initializing BertModel from the checkpoint of a model trained on another task or with another architecture (e.g. initializing a BertForSequenceClassification model from a BertForPreTraining model).\n",
       "- This IS NOT expected if you are initializing BertModel from the checkpoint of a model that you expect to be exactly identical (initializing a BertForSequenceClassification model from a BertForSequenceClassification model).\n",
-      "Some weights of BertModel were not initialized from the model checkpoint at ../../examples/test_model/data/data/bert and are newly initialized: ['bert.pooler.dense.bias', 'bert.pooler.dense.weight']\n",
+      "Some weights of BertModel were not initialized from the model checkpoint at ../../examples/test_model/data/pretrain_test_models/bert and are newly initialized: ['bert.pooler.dense.weight', 'bert.pooler.dense.bias']\n",
       "You should probably TRAIN this model on a down-stream task to be able to use it for predictions and inference.\n",
-      "loading file ../../examples/test_model/data/data/bert\\vocab.txt\n",
-      "loading file ../../examples/test_model/data/data/bert\\tokenizer.json\n",
-      "loading file ../../examples/test_model/data/data/bert\\added_tokens.json\n",
-      "loading file ../../examples/test_model/data/data/bert\\special_tokens_map.json\n",
-      "loading file ../../examples/test_model/data/data/bert\\tokenizer_config.json\n"
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/vocab.txt\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/added_tokens.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/special_tokens_map.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/tokenizer_config.json\n",
+      "Adding [TEXT] to the vocabulary\n",
+      "Adding [FORMULA] to the vocabulary\n",
+      "Adding [FIGURE] to the vocabulary\n",
+      "Adding [MARK] to the vocabulary\n",
+      "Adding [TAG] to the vocabulary\n",
+      "Adding [TEXT_BEGIN] to the vocabulary\n",
+      "Adding [TEXT_END] to the vocabulary\n",
+      "Adding [FORMULA_BEGIN] to the vocabulary\n",
+      "Adding [FORMULA_END] to the vocabulary\n",
+      "Assigning ['[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]'] to the additional_special_tokens key of the tokenizer\n"
      ]
     },
     {
@@ -446,33 +398,26 @@
      "output_type": "stream",
      "text": [
       "torch.Size([1, 768])\n",
-      "torch.Size([1, 21, 768])\n",
-      "\n",
+      "torch.Size([1, 17, 768])\n",
       "torch.Size([2, 768])\n",
-      "torch.Size([2, 32, 768])\n"
+      "torch.Size([2, 17, 768])\n"
      ]
     }
    ],
    "source": [
-    "item = [\n",
-    "        {'stem': '如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \\\n",
-    "        若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'},\n",
-    "        {'stem': '已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为'}\n",
-    "]\n",
     "\n",
     "tokenizer_kwargs = {\"tokenizer_config_dir\": output_dir}\n",
     "i2v = Bert('bert', 'bert', output_dir, tokenizer_kwargs=tokenizer_kwargs)\n",
     "\n",
     "# 可以对单个题目进行表征\n",
-    "i_vec, t_vec = i2v(item[0]['stem'])\n",
-    "print(i_vec.shape) # == torch.Size([x, x])\n",
-    "print(t_vec.shape) # == torch.Size([x, x, x])\n",
-    "print()\n",
+    "i_vec, t_vec = i2v(test_items[0], key=lambda x: x[\"ques_content\"])\n",
+    "print(i_vec.shape) # == torch.Size([x])\n",
+    "print(t_vec.shape) # == torch.Size([x, x])\n",
     "\n",
     "# 也可以对题目列表进行表征\n",
-    "i_vec, t_vec = i2v([ item[0]['stem'], item[1]['stem'] ])\n",
-    "print(i_vec.shape) # == torch.Size([x, x])\n",
-    "print(t_vec.shape) # == torch.Size([x, x, x])"
+    "i_vec, t_vec = i2v(test_items, key=lambda x: x[\"ques_content\"])\n",
+    "print(i_vec.shape) # == torch.Size([2, x])\n",
+    "print(t_vec.shape) # == torch.Size([2, x, x]))\n"
    ]
   },
   {
@@ -484,33 +429,47 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [
     {
      "name": "stderr",
      "output_type": "stream",
      "text": [
-      "loading file ../../examples/test_model/data/data/bert\\vocab.txt\n",
-      "loading file ../../examples/test_model/data/data/bert\\tokenizer.json\n",
-      "loading file ../../examples/test_model/data/data/bert\\added_tokens.json\n",
-      "loading file ../../examples/test_model/data/data/bert\\special_tokens_map.json\n",
-      "loading file ../../examples/test_model/data/data/bert\\tokenizer_config.json\n"
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/vocab.txt\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/added_tokens.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/special_tokens_map.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/tokenizer_config.json\n",
+      "Adding [TEXT] to the vocabulary\n",
+      "Adding [FORMULA] to the vocabulary\n",
+      "Adding [FIGURE] to the vocabulary\n",
+      "Adding [MARK] to the vocabulary\n",
+      "Adding [TAG] to the vocabulary\n",
+      "Adding [TEXT_BEGIN] to the vocabulary\n",
+      "Adding [TEXT_END] to the vocabulary\n",
+      "Adding [FORMULA_BEGIN] to the vocabulary\n",
+      "Adding [FORMULA_END] to the vocabulary\n",
+      "Assigning ['[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]'] to the additional_special_tokens key of the tokenizer\n"
      ]
     },
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "{'input_ids': [101, 1062, 2466, 1963, 1745, 21129, 166, 117, 167, 5276, 3338, 3340, 816, 1062, 2466, 102, 168, 134, 166, 116, 128, 8179, 3297, 1920, 966, 21130, 102], 'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'attention_mask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]}\n",
+      "{'input_ids': tensor([[  101,   100,   100,   100, 21130,   166,   117,   167,   100,   102,\n",
+      "           168,   134,   166,   116,   128,   167,   100, 21131,   102]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]])}\n",
       "\n",
-      "{'input_ids': [[101, 1062, 2466, 1963, 1745, 21129, 166, 117, 167, 5276, 3338, 3340, 816, 1062, 2466, 102, 168, 134, 166, 116, 128, 8179, 3297, 1920, 966, 21130, 102, 0, 0, 0, 0, 0, 0, 0], [101, 2347, 4761, 1749, 166, 141, 169, 123, 171, 116, 167, 141, 169, 123, 171, 118, 127, 8206, 134, 121, 6814, 4157, 4684, 5296, 1749, 2779, 2533, 2478, 7270, 2428, 3297, 2207, 966, 102]], 'token_type_ids': [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], 'attention_mask': [[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]]}\n",
+      "{'input_ids': tensor([[  101,   100,   100,   100, 21130,   166,   117,   167,   100,   102,\n",
+      "           168,   134,   166,   116,   128,   167,   100, 21131,   102],\n",
+      "        [  101,   100, 21130,   166,   117,   167,   100,   102,   168,   134,\n",
+      "           166,   116,   128,   167,   100, 21131,   102,     0,     0]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n",
+      "        [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],\n",
+      "        [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0]])}\n",
       "\n",
-      "{'input_ids': tensor([[  101,  1062,  2466,  1963,  1745, 21129,   166,   117,   167,  5276,\n",
-      "          3338,  3340,   816,  1062,  2466,   102,   168,   134,   166,   116,\n",
-      "           128,  8179,  3297,  1920,   966, 21130,   102]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n",
-      "         0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\n",
-      "         1, 1, 1]])}\n"
+      "{'input_ids': tensor([[  101,   100,   100,   100, 21130,   166,   117,   167,   100,   102,\n",
+      "           168,   134,   166,   116,   128,   167,   100, 21131,   102]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]])}\n",
+      "['公式', '公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']\n",
+      "[['公式', '公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]'], ['如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']]\n"
      ]
     }
    ],
@@ -518,44 +477,116 @@
     "# 在Bert-base-chinese的基础上初始化tokenizer\n",
     "tokenizer = BertTokenizer.from_pretrained(output_dir)\n",
     "\n",
-    "# 对题目文本进行令牌化\n",
-    "items = [\n",
-    "    \"有公式$\\\\FormFigureID{wrong1?}$，如图$\\\\FigureID{088f15ea-xxx}$,\\\n",
-    "    若$x,y$满足约束条件公式$\\\\FormFigureBase64{wrong2?}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\",\n",
-    "    \"已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为\"\n",
-    "]\n",
     "\n",
     "# 可以对单个题目进行令牌化\n",
-    "print(tokenizer(items[0]))\n",
+    "print(tokenizer(test_items[0], key=lambda x: x['ques_content']))\n",
     "print()\n",
     "\n",
     "# 也可以对题目列表进行令牌化\n",
-    "token_items = tokenizer(items)\n",
+    "token_items = tokenizer(test_items, key=lambda x: x['ques_content'])\n",
     "print(token_items)\n",
     "print()\n",
     "\n",
     "# 可以使用return_tensors参数指定返回张量的类型\n",
-    "print(tokenizer(items[0], return_tensors='pt'))"
+    "print(tokenizer(test_items[0], key=lambda x: x['ques_content'], return_tensors='pt'))\n",
+    "\n",
+    "\n",
+    "# 可以使用tokenize方法查看令牌化后的文本\n",
+    "print(tokenizer.tokenize(test_items[0], key=lambda x: x['ques_content']))\n",
+    "print(tokenizer.tokenize(test_items, key=lambda x: x['ques_content']))"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 24,
    "metadata": {},
    "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/vocab.txt\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/added_tokens.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/special_tokens_map.json\n",
+      "loading file ../../examples/test_model/data/pretrain_test_models/bert/tokenizer_config.json\n",
+      "Adding [TEXT] to the vocabulary\n",
+      "Adding [FORMULA] to the vocabulary\n",
+      "Adding [FIGURE] to the vocabulary\n",
+      "Adding [MARK] to the vocabulary\n",
+      "Adding [TAG] to the vocabulary\n",
+      "Adding [TEXT_BEGIN] to the vocabulary\n",
+      "Adding [TEXT_END] to the vocabulary\n",
+      "Adding [FORMULA_BEGIN] to the vocabulary\n",
+      "Adding [FORMULA_END] to the vocabulary\n",
+      "Assigning ['[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]'] to the additional_special_tokens key of the tokenizer\n",
+      "loading configuration file ../../examples/test_model/data/pretrain_test_models/bert/config.json\n",
+      "Model config BertConfig {\n",
+      "  \"_name_or_path\": \"bert-base-chinese\",\n",
+      "  \"architectures\": [\n",
+      "    \"BertForMaskedLM\"\n",
+      "  ],\n",
+      "  \"attention_probs_dropout_prob\": 0.1,\n",
+      "  \"classifier_dropout\": null,\n",
+      "  \"directionality\": \"bidi\",\n",
+      "  \"hidden_act\": \"gelu\",\n",
+      "  \"hidden_dropout_prob\": 0.1,\n",
+      "  \"hidden_size\": 768,\n",
+      "  \"initializer_range\": 0.02,\n",
+      "  \"intermediate_size\": 3072,\n",
+      "  \"layer_norm_eps\": 1e-12,\n",
+      "  \"max_position_embeddings\": 512,\n",
+      "  \"model_type\": \"bert\",\n",
+      "  \"num_attention_heads\": 12,\n",
+      "  \"num_hidden_layers\": 12,\n",
+      "  \"pad_token_id\": 0,\n",
+      "  \"pooler_fc_size\": 768,\n",
+      "  \"pooler_num_attention_heads\": 12,\n",
+      "  \"pooler_num_fc_layers\": 3,\n",
+      "  \"pooler_size_per_head\": 128,\n",
+      "  \"pooler_type\": \"first_token_transform\",\n",
+      "  \"position_embedding_type\": \"absolute\",\n",
+      "  \"torch_dtype\": \"float32\",\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"type_vocab_size\": 2,\n",
+      "  \"use_cache\": true,\n",
+      "  \"vocab_size\": 21137\n",
+      "}\n",
+      "\n",
+      "loading weights file ../../examples/test_model/data/pretrain_test_models/bert/pytorch_model.bin\n",
+      "Some weights of the model checkpoint at ../../examples/test_model/data/pretrain_test_models/bert were not used when initializing BertModel: ['cls.predictions.transform.dense.weight', 'cls.predictions.transform.LayerNorm.bias', 'cls.predictions.transform.LayerNorm.weight', 'cls.predictions.transform.dense.bias', 'cls.predictions.decoder.weight', 'cls.predictions.decoder.bias', 'cls.predictions.bias']\n",
+      "- This IS expected if you are initializing BertModel from the checkpoint of a model trained on another task or with another architecture (e.g. initializing a BertForSequenceClassification model from a BertForPreTraining model).\n",
+      "- This IS NOT expected if you are initializing BertModel from the checkpoint of a model that you expect to be exactly identical (initializing a BertForSequenceClassification model from a BertForSequenceClassification model).\n",
+      "Some weights of BertModel were not initialized from the model checkpoint at ../../examples/test_model/data/pretrain_test_models/bert and are newly initialized: ['bert.pooler.dense.weight', 'bert.pooler.dense.bias']\n",
+      "You should probably TRAIN this model on a down-stream task to be able to use it for predictions and inference.\n"
+     ]
+    },
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "['公', '式', '如', '图', '[FIGURE]', 'x', ',', 'y', '约', '束', '条', '件', '公', '式', '[SEP]', 'z', '=', 'x', '+', '7', '##y', '最', '大', '值', '[MARK]']\n",
-      "[['公', '式', '如', '图', '[FIGURE]', 'x', ',', 'y', '约', '束', '条', '件', '公', '式', '[SEP]', 'z', '=', 'x', '+', '7', '##y', '最', '大', '值', '[MARK]'], ['已', '知', '圆', 'x', '^', '{', '2', '}', '+', 'y', '^', '{', '2', '}', '-', '6', '##x', '=', '0', '过', '点', '直', '线', '圆', '截', '得', '弦', '长', '度', '最', '小', '值']]\n"
+      "torch.Size([2, 19, 768])\n",
+      "\n",
+      "torch.Size([2, 768])\n",
+      "torch.Size([2, 17, 768])\n",
+      "\n"
      ]
     }
    ],
    "source": [
-    "# 可以使用tokenize方法查看令牌化后的文本\n",
-    "print(tokenizer.tokenize(items[0]))\n",
-    "print(tokenizer.tokenize(items))"
+    "# 加载之前训练的模型tokenizer\n",
+    "tokenizer = BertTokenizer.from_pretrained(pretrained_model_dir)\n",
+    "encodes = tokenizer(test_items, key=lambda x: x['ques_content'])\n",
+    "\n",
+    "t2v = BertModel(pretrained_model_dir)\n",
+    "i_vec = t2v(encodes)\n",
+    "print(i_vec.shape) # == torch.Size([2, x])\n",
+    "print()\n",
+    "\n",
+    "i_vec = t2v.infer_vector(encodes)\n",
+    "t_vec = t2v.infer_tokens(encodes)\n",
+    "print(i_vec.shape) # == torch.Size([2, x])\n",
+    "print(t_vec.shape) # == torch.Size([2, x, x]))\n",
+    "print()"
    ]
   },
   {
@@ -782,25 +813,20 @@
     }
    ],
    "source": [
-    "items = [\n",
-    "    \"有公式$\\\\FormFigureID{wrong1?}$，如图$\\\\FigureID{088f15ea-xxx}$,\\\n",
-    "    若$x,y$满足约束条件公式$\\\\FormFigureBase64{wrong2?}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\",\n",
-    "    \"已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为\"\n",
-    "]\n",
-    "i_vec, t_vec = i2v(items)\n",
+    "i_vec, t_vec = i2v(test_items, key=lambda x: x['ques_content'])\n",
     "print(i_vec.shape)\n",
     "print(t_vec.shape)\n",
     "print()\n",
     "\n",
     "# 也可以单独获取题目表征和各个token的表征\n",
-    "i_vec = i2v.infer_item_vector(items)\n",
+    "i_vec = i2v.infer_item_vector(test_items, key=lambda x: x['ques_content'])\n",
     "print(i_vec.shape)\n",
-    "t_vec = i2v.infer_token_vector(items)\n",
+    "t_vec = i2v.infer_token_vector(test_items, key=lambda x: x['ques_content'])\n",
     "print(t_vec.shape)\n",
     "print()\n",
     "\n",
     "# 同样，可以获取单个题目的表征\n",
-    "i_vec, t_vec = i2v(item[0])\n",
+    "i_vec, t_vec = i2v(test_items[0], key=lambda x: x['ques_content'])\n",
     "print(i_vec.shape)\n",
     "print(t_vec.shape)"
    ]
@@ -814,11 +840,8 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "2a09bcfc86f5d80d5adfb774779878f28f4d48d5a6d6c0020bcfd8afaf909ec6"
-  },
   "kernelspec": {
-   "display_name": "Python 3.6.13 ('data')",
+   "display_name": "Python 3.10.4 64-bit",
    "language": "python",
    "name": "python3"
   },
@@ -832,9 +855,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.10.4"
   },
-  "orig_nbformat": 4
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
+  }
  },
  "nbformat": 4,
  "nbformat_minor": 2
diff --git a/examples/pretrain/disenq.ipynb b/examples/pretrain/disenq.ipynb
index 5e351bf5..abfaa949 100644
--- a/examples/pretrain/disenq.ipynb
+++ b/examples/pretrain/disenq.ipynb
@@ -423,11 +423,8 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "2a09bcfc86f5d80d5adfb774779878f28f4d48d5a6d6c0020bcfd8afaf909ec6"
-  },
   "kernelspec": {
-   "display_name": "Python 3.6.13 ('data')",
+   "display_name": "Python 3.10.4 64-bit",
    "language": "python",
    "name": "python3"
   },
@@ -441,9 +438,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.10.4"
   },
-  "orig_nbformat": 4
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
+  }
  },
  "nbformat": 4,
  "nbformat_minor": 2
diff --git a/examples/pretrain/elmo.ipynb b/examples/pretrain/elmo.ipynb
index 4ff78fac..99ab7d5a 100644
--- a/examples/pretrain/elmo.ipynb
+++ b/examples/pretrain/elmo.ipynb
@@ -2,26 +2,20 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 5,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "d:\\MySoftwares\\Anaconda\\envs\\data\\lib\\site-packages\\gensim\\similarities\\__init__.py:15: UserWarning: The gensim.similarities.levenshtein submodule is disabled, because the optional Levenshtein package <https://pypi.org/project/python-Levenshtein/> is unavailable. Install Levenhstein (e.g. `pip install python-Levenshtein`) to suppress this warning.\n",
-      "  warnings.warn(msg)\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "import torch\n",
     "import numpy as np\n",
     "import os\n",
     "import json\n",
+    "from EduNLP.ModelZoo.rnn import ElmoLM\n",
     "from EduNLP.Pretrain import train_elmo, ElmoTokenizer\n",
     "from EduNLP.Vector import ElmoModel, T2V\n",
-    "from EduNLP.I2V import Elmo, get_pretrained_i2v"
+    "from EduNLP.I2V import Elmo, get_pretrained_i2v\n",
+    "\n",
+    "os.environ[\"WANDB_DISABLED\"] = \"true\""
    ]
   },
   {
@@ -34,7 +28,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -42,35 +36,24 @@
     "BASE_DIR = \"../..\"\n",
     "\n",
     "data_dir = f\"{BASE_DIR}/static/test_data\"\n",
-    "output_dir = f\"{BASE_DIR}/examples/test_model/elmo\""
+    "output_dir = f\"{BASE_DIR}/data/pretrain_test_models/elmo/\""
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [],
    "source": [
-    "def raw_data():\n",
+    "def stem_data():\n",
     "    _data = []\n",
-    "    data_path = os.path.join(data_dir, \"OpenLUNA.json\")\n",
+    "    data_path = os.path.join(data_dir, \"standard_luna_data.json\")\n",
     "    with open(data_path, encoding=\"utf-8\") as f:\n",
     "        for line in f.readlines():\n",
     "            _data.append(json.loads(line))\n",
     "    return _data\n",
     "\n",
-    "def stem_data(data):\n",
-    "    _data = []\n",
-    "    tokenizer = ElmoTokenizer()\n",
-    "    for e in data:\n",
-    "        d = tokenizer.tokenize(item=e['stem'], freeze_vocab=False)\n",
-    "        if d is not None:\n",
-    "            _data.append(d)\n",
-    "    assert _data\n",
-    "    return _data\n",
-    "\n",
-    "raw_data = raw_data()\n",
-    "train_items = stem_data(raw_data)"
+    "train_items = stem_data()"
    ]
   },
   {
@@ -82,8881 +65,116 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
-     "name": "stdout",
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "cc1d2664c1af48f7b6d16b5a5fbe4c39",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "  0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "Model config PretrainedConfig {\n",
+      "  \"architecture\": \"ElmoLM\",\n",
+      "  \"batch_first\": true,\n",
+      "  \"dropout_rate\": 0.5,\n",
+      "  \"embedding_dim\": 300,\n",
+      "  \"hidden_size\": 300,\n",
+      "  \"num_layers\": 2,\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"use_pack_pad\": false,\n",
+      "  \"vocab_size\": 305\n",
+      "}\n",
+      "\n",
+      "Model config PretrainedConfig {\n",
+      "  \"architecture\": \"ElmoLMForPreTraining\",\n",
+      "  \"batch_first\": true,\n",
+      "  \"dropout_rate\": 0.5,\n",
+      "  \"embedding_dim\": 300,\n",
+      "  \"hidden_size\": 300,\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"use_pack_pad\": false,\n",
+      "  \"vocab_size\": 305\n",
+      "}\n",
+      "\n",
+      "PyTorch: setting up devices\n",
+      "The default value for the training argument `--report_to` will change in v5 (from all installed integrations to none). In v5, you will need to use `--report_to all` to get the same behavior as now. You should start updating your code and make this info disappear :-).\n",
+      "Using the `WAND_DISABLED` environment variable is deprecated and will be removed in v5. Use the --report_to flag to control the integrations used for logging result (for instance --report_to none).\n",
+      "/home/qlh/anaconda3/envs/dev/lib/python3.6/site-packages/transformers/optimization.py:309: FutureWarning: This implementation of AdamW is deprecated and will be removed in a future version. Use the PyTorch implementation torch.optim.AdamW instead, or set `no_deprecation_warning=True` to disable this warning\n",
+      "  FutureWarning,\n",
+      "***** Running training *****\n",
+      "  Num examples = 25\n",
+      "  Num Epochs = 1\n",
+      "  Instantaneous batch size per device = 8\n",
+      "  Total train batch size (w. parallel, distributed & accumulation) = 16\n",
+      "  Gradient Accumulation steps = 1\n",
+      "  Total optimization steps = 2\n",
+      "/home/qlh/anaconda3/envs/dev/lib/python3.6/site-packages/torch/nn/modules/rnn.py:662: UserWarning: RNN module weights are not part of single contiguous chunk of memory. This means they need to be compacted at every call, possibly greatly increasing memory usage. To compact weights again call flatten_parameters(). (Triggered internally at  /pytorch/aten/src/ATen/native/cudnn/RNN.cpp:915.)\n",
+      "  self.dropout, self.training, self.bidirectional, self.batch_first)\n",
+      "/home/qlh/anaconda3/envs/dev/lib/python3.6/site-packages/torch/nn/parallel/_functions.py:65: UserWarning: Was asked to gather along dimension 0, but all input tensors were scalars; will instead unsqueeze and return a vector.\n",
+      "  warnings.warn('Was asked to gather along dimension 0, but all '\n"
+     ]
+    },
+    {
+     "data": {
+      "text/html": [
+       "\n",
+       "    <div>\n",
+       "      \n",
+       "      <progress value='2' max='2' style='width:300px; height:20px; vertical-align: middle;'></progress>\n",
+       "      [2/2 00:00, Epoch 1/1]\n",
+       "    </div>\n",
+       "    <table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       " <tr style=\"text-align: left;\">\n",
+       "      <th>Step</th>\n",
+       "      <th>Training Loss</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "  </tbody>\n",
+       "</table><p>"
+      ],
+      "text/plain": [
+       "<IPython.core.display.HTML object>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stderr",
      "output_type": "stream",
      "text": [
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   13,   15,   16,   17,   18,\n",
-      "           19,   17,   13,   34,  125,   11,   91,  248,   15,   16,   13,   19,\n",
-      "           29,   18,   34,  248,   15,   16,   19,   13,   34,   29,   18,   24,\n",
-      "           93, 1181,  253,  125,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  132,   16,  125,   92,  131,   18,  125,   92,   29,   34,  125,\n",
-      "           92,   20,   10,   96,  584,  125,   92,   17,   34,  125,   92,   21,\n",
-      "           10,   30,  584, 1785,   92,   29,  125,   92,   17,  837,  125,   92,\n",
-      "          131,  168,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  229,  116,   16,   29,   18,   16,   17,   34,  116,   16,   29,\n",
-      "           18,   16,   17,   34,  116,   16,   29,   18,   16,   17,   18,   18,\n",
-      "           18,  129,  593,  995, 1159,  997,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   32,   33,  116,   16,   29,   34,   33,   18,   16,   29,   19,\n",
-      "           33,   18,   10,   35, 1722,   33, 1722,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 125,  257,  170,  257,   23,   23,   22,  162,   22,   29,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61, 1393, 1662,  138,  242, 1393, 1599, 1662, 1515,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   26,  889,   16,  170,   18,  350,\n",
-      "          351,   15,   16,   82,   18,   26,   27,   36,  889,   16,  125,   18,\n",
-      "           36,   10,   17,   26,   27,   36,  889,   16,  170,   18,   36,   10,\n",
-      "           29,   36,  889,   16,  125,   18,   34,   17,  889,   16,  170,   18,\n",
-      "           36,  737,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  519,  520,  149,  523,  878,  879,  359,  880,  352,  523,  804,\n",
-      "          519,  247,  116,   16,  881,  117,   18,   16,   20,   18,  158,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,  230,   91,  115,   13,   34,\n",
-      "          796,   93,   11,   91,  115,  257,   23,   26,   27,   36,  796,   36,\n",
-      "          578,  116,   16,  117,   18,   16,   17,   18,   24,   93,   26,   27,\n",
-      "           13,   10,   19,  116,   16,  117,   18,   16,   21,   18,  113,   91,\n",
-      "           13,   93,  253,   83,   16,   13,   18,   10,  116,   16,  117,   18,\n",
-      "           16,   21,   18,   83,   16,   79,   18,   10,   83,   16,  113,   18,\n",
-      "           91,   83,   16,   13,   18,   93,  797, 1783,   83,   16,  113,   18,\n",
-      "           91,   83,   16,   13,   18,   93,   11,   91,  116,   16,  117,   18,\n",
-      "           16, 1484,   18,   26,  116,   16,   30,  117,   18,   16, 1426,   18,\n",
-      "           24,   93,  251,  115,  168,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 353,   92,  131,  180,   12,  125,   92,  131,   25,  181,  131,  183,\n",
-      "            7,  125,   92,  131,  962,   23,  584,  125,   92,  131,   15,   17,\n",
-      "           34,   17,  125,   92,  131,   10,   21,  353,   92,  131,   34,   20,\n",
-      "          229,   16,  125,   92,  131,   18,  526,  527,   61,  170,   92,  131,\n",
-      "           10,  116,   16,   29,   18,   16,  125,   92,  602,   92,   16,  131,\n",
-      "           34,   29,   18,   18,  229,  180,   16,  170,   92,  131,   18,  181,\n",
-      "          131,  183,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  798,  129,  355, 1415,  436,  130,  610,   54, 1021,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1880, 1881,  276,  102,  173,   65,  273,  178,   11,   12,  160,  161,\n",
-      "           16,  277,   18,   13,   10,   20,  114,  288,  164,   79,   10,  230,\n",
-      "          288,  166,  161,   26,   91,  288,  478,   16,  479,   18,   93,   24,\n",
-      "          167,  107,  502,  273,  178,   11,   12,  160,  161,   16,  277,   18,\n",
-      "           83,   16,   13,   18,   10,   83,   16,  125,   18,   34,   21,   83,\n",
-      "           16,  279,   18,  164,   83,   16,   79,   18,   10,   29,   19,   83,\n",
-      "           16,  279,   18,  166,  161,   26,   27,   91,   83,   16,  279,   18,\n",
-      "          478,   16,  479,   18,   93,   24,  167,  125,  229,   65,  502,  267,\n",
-      "          140,   65,   68,   36,  358,  168, 1856,  228, 1048,  229,  125,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 173,   79,   10,   17,  174,   91,   13,   34,   29,   93,   68,  579,\n",
-      "          176,  178,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  91,  125,   34,   13,   93,   91,   29,   34,   13,   93,   15,   16,\n",
-      "           21,   18,  582,  102,   13, 2040, 2041, 2042,  583, 2005,  125,  179,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 136,  116,   16,   13,   15,   16,   17,   18,   18,   16,  125,   15,\n",
-      "           16,   17,   18,   18,   19,  116,   16,   79,   15,   16,   17,   18,\n",
-      "           18,   16,  170,   15,   16,   17,   18,   18,   10,   29,   27,   91,\n",
-      "          125,  257,   23,   26,  170,  257,   23,   93,  457,  228,   16,   20,\n",
-      "           18,  360,  178,   91,   27,   93,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 125,  136,  116,   16,   13,   15,   16,   17,   18,   18,   16,  125,\n",
-      "           15,   16,   17,   18,   18,   19,   79,   15,   16,   17,   18,   10,\n",
-      "           29,  457,  254,   91,   27,   93,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,   13,   79,   33, 1186,   17,   15,   16,   13,   18,   10,   20,\n",
-      "           15,   16,   79,   18,   10,   30,   15,   16,   33,   18,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   91,   29,   34,   17,   35,   93,   91,  125,   34,   35,   93,\n",
-      "          860,  722,  125,  861,  125,   54,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  136,   65,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           27,   91,  125,  257,   23,   26,  170,  257,   23,   93,  457,  228,\n",
-      "           16,   17,   18,   68,   65,  360,  358,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  116,   16,  521,   13,   18,   16,\n",
-      "           29,   34,  521,   15,   16,   17,   18,   13,   18,  580,  123,    4,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  349,  125,   26,  170,  350,  351,   15,   16,   82,   18,   26,\n",
-      "          169,  102,  170,  352,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  290,  291,    7,  125,   26,  170,   26,  162, 1186,  574,   10,\n",
-      "           29,  241,  116,   16,   29,   18,   16,  125,   18,   34,  116,   16,\n",
-      "           29,   18,   16,  170,   18,   34,  116,   16,   29,   18,   16,  162,\n",
-      "           18,  163,  125,   15,   16,   17,   18,   34,  170,   15,   16,   17,\n",
-      "           18,   34,  162,   15,   16,   17,   18,   91,  125,   34,  170,   93,\n",
-      "           15,   16,   20,   18,   34,   91,  170,   34,  162,   93,   15,   16,\n",
-      "           20,   18,   34,   91,  162,   34,  125,   93,   15,   16,   20,   18,\n",
-      "          165,  354,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1361,  441,  893, 1362, 1363,  710, 1364, 1365,  893,  894,  338, 1366,\n",
-      "          894, 1366, 1362, 1367,   97,  705, 1368,  530,  407, 1369, 1370,   85,\n",
-      "         1371, 1368, 1372, 1366, 1373, 1368, 1374, 1366, 1368,  893,  331, 1375,\n",
-      "           81, 1016, 1193, 1376, 1377, 1376, 1377,  554, 1366, 1362, 1378,  449,\n",
-      "          229,   97,  705, 1368,  893,  828, 1375, 1379,  171,  893,  828, 1375,\n",
-      "          339,  171,  339,  171, 1368,  433,  997,  553,  102,  553, 1382,  556,\n",
-      "          894, 1366, 1362,  440,  450,  503,   15,   16,   17,   18,   10,  116,\n",
-      "           16,  131,   91,  539,   19,  540,   93,   15,   16,   17,   18,   18,\n",
-      "           16,   91,  125,   34,  170,   93,   91,  162,   34,  541,   93,   91,\n",
-      "          125,   34,  162,   93,   91,  170,   34,  541,   93,   18,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  139,  135,   92,   16,   29,   18,   91,   19,   29,\n",
-      "           26,   23,   93,   26,   27,  135,   92,   16,   17,   18,   91,   29,\n",
-      "           26,   23,   93,  135,   92,   16,   17,   18,  107,   65,  361,    9,\n",
-      "          584,   28,  362,   11,   36, 1162,   92,   16,   17,   18,   24,   36,\n",
-      "           10,   17,   11,   36,  135,   92,   16,   17,   18,   28,   24,   36,\n",
-      "           26,   36,  153,   36,   10,   11,   36,  562,   92,   16,   29,   18,\n",
-      "           24,   36,   65,  178,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 363,  151,  226,    9,   26,   28,   26,   65,  125,   26,  170,   26,\n",
-      "          162,   26,   27,    7,  114,   15,   16,   17,   18,   11,   91,  116,\n",
-      "           16,  117,   18,   16,   17,   18,   34,    9,   24,   93,   34,  114,\n",
-      "            9,   10,  116,   16,   30,   18,   16,   21,   18,  229,    9,  170,\n",
-      "           19,  162,   10,  116,   16,  228,   16,   20,   18,   18,   16,   20,\n",
-      "           18,  125,   26,  241,  363,  151,  395,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  226,    9,   28,   65,  125,  170,  162,\n",
-      "            7,  230,    9,   34,  228,   16,   20,   18,  114,    9,   10,   23,\n",
-      "           26,   27,  125,   10,   17,  228,   16,  133,   18,  164,  170,  164,\n",
-      "          229,  162,   61,   66,  154, 1067,  238,  594,  172,  155,  229,  145,\n",
-      "           83,   16, 2016,   18,   53,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  800,  232, 1516,  519,  520,  519,  158,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  174,   13,   34,  125,   91,\n",
-      "           29,   19,   13,   93,  250,  113,   91,   13,   93,  251, 1316,  113,\n",
-      "           91,   13,   93,  168,  168,  754, 1510,  249,  229,  125,  254,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,  297,  298,  299,  300,  301,  125,   92,   16,   29,   18,   26,\n",
-      "          125,   92,   16,   17,   18,   26,   94,  125,   92,   16,  298,   18,\n",
-      "           26,   61,   29,  163,   35,  163,  302,  163,  278,  163,  298,  278,\n",
-      "           19,  302,   10,   20,  302,   19,   35,   10,   21,  303,  125,   92,\n",
-      "           16,   35,   18,   26,  125,   92,   16,  302,   18,   26,  125,   92,\n",
-      "           16,  278,   18,  304,  305,  278,   19,  302,   10,   21,  302,   19,\n",
-      "           35,   10,   20,   26,  303,  125,   92,   16,   35,   18,   26,  125,\n",
-      "           92,   16,  302,   18,   26,  125,   92,   16,  278,   18,  304,  306,\n",
-      "          298,  299,  304,  305,  304,  306,  307,  308,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  513,   65,   79,   15,   16,   17,   18,   10,   21,   13,  139,\n",
-      "          135,  135,  177,  278,  278,  107,  277,   65,  515,    9,   28,  362,\n",
-      "           36,  153,   36,   10,  134,  229,  277,  178, 1645,   68,    9,   28,\n",
-      "           65,  458,  357,  104,  178,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  246,  142,  822,  151,  102,  153,   10,  154,   10,   17,  228,\n",
-      "           16,   17,   18,   83,   16,  266,   18,   10,   83,   16,  268,   18,\n",
-      "           10,   83,   16,  608,   18,   10,   83,   16,  155,   18,   10,   21,\n",
-      "           62,  155,  466,  241,  605,  815,  242,  151,  567,  464,  558,  154,\n",
-      "          607,  464,  822,  266,  822,   65,  596,  820,  229,  608,  242, 2136,\n",
-      "          719,  720,  610,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  116,   16,  248,   15,   16,   13,\n",
-      "           18,   19,  248,   15,   16,   19,   13,   18,   18,   16,   13,   15,\n",
-      "           16,   17,   18,   18,  797,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  464,   91,   13,   92,   23,  584,   79,   92,   23,   93,  136,\n",
-      "           65,  137,  116,   16,   13,   15,   17,   18,   16,   17,   18,   19,\n",
-      "           79,   15,   17,   10,   29,  238,  135,   92,   29,  135,   92,   17,\n",
-      "           65,  258,  259,  138,  139, 1735,   16, 1736,   18,   16,  716,   92,\n",
-      "           29,   18,  263, 1735,   16, 1736,   18,   16,  716,   92,   17,   18,\n",
-      "         1737,   23,   79,   92,   23,  254,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  11,   91,   29,   34,  116,   16,   29,   18,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   24,   93,   91,   29,   34,   13,   93,   15,   16,\n",
-      "          105,   18,  582,  102,   13,   15,   16,   17,   18,  583,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301,   83,   16,  353,   18,   92,   16,  131,   18,  180,   11,   12,\n",
-      "          125,   92,   16,  131,   18,   24,   25,  181,  131,  183,   83,   16,\n",
-      "          353,   18,   92,   16,  131,   18,   10,   17,  125,   92,   16,  131,\n",
-      "           18,   34,   29,   83,   16,  353,   18,   92,   16,  105,   18,   10,\n",
-      "          179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   11,   12,   13,   36,   13,   15,   16,   17,\n",
-      "           18,   19,   13,   19,   17,  257,   23,   24,   25,   11,  118,   92,\n",
-      "           16,  573,   18,    9,   24,  167,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 417,  379,    9,   28,   65,  822, 1775,   79,  949,  464,  465,  362,\n",
-      "           36,  470,   36,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 521,  288,   10,  116,   16,   29,   18,   16,   20,   18,  114,   17,\n",
-      "          288,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  231,  129,  355,  125,   10,   21,  170,   10,  105,  130,  131,\n",
-      "           10,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  145,   83,   16,  956,   18,  957,  669,  239,   83,   16,  958,\n",
-      "           18,   10,  819,   15,   16,   82,   18,  167,  234,   26,  116,   16,\n",
-      "           29,   18,   16,   17,   18,   83,   16,  854,   18,  523,  959,  241,\n",
-      "          107,  153,  150,   62,  357,   68,   65,   66,  150,   62,    9,   28,\n",
-      "           65,   66,  960,  961,  241,  153,  269,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  7, 125, 294,  11,  91,  23,  26, 116,  16, 117,  18,  16,  17,  18,\n",
-      "          24,  93,  17, 230,  17, 384,  10, 114,  17, 384,  34,  29,  26, 230,\n",
-      "         384,  10,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [112, 113,  91,  13,  93,  10,  17, 230,  13,  19, 230,  17,  13, 118,\n",
-      "          23,  26,  17, 117, 119, 253, 307,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7,   9,  26,  28, 255, 256, 137, 116,  16,  13,  15,  16,  17,  18,\n",
-      "          18,  16, 125,  15,  16,  17,  18,  18,  34,  79,  15,  16,  17,  18,\n",
-      "          10,  29,  91, 125, 257,  29,  93, 258, 259, 233, 260, 256, 233,  26,\n",
-      "         261,  16, 262,  18, 263, 261,  16, 264,  18,  10, 134,  26, 142, 107,\n",
-      "          13,  10, 105, 265, 266, 256, 267,  65, 268, 256, 267,  66, 229, 256,\n",
-      "         178, 241, 107, 269, 270,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [271, 272, 273, 178, 274, 275, 276, 102, 173,  65, 273, 178,  11,  12,\n",
-      "         160, 161,  16, 277,  18,  13,  10,  17,  19, 279,  19, 279,  15,  16,\n",
-      "          17,  18, 164,  79,  10,  17,  19,  20, 279,  34, 279,  15,  16,  17,\n",
-      "          18, 166, 161,  26,  91, 279, 478,  16, 755,  18, 279, 572,  29,  24,\n",
-      "         167,  65, 356, 515,   9,  28, 362, 229,  36, 153,  36, 140, 141, 280,\n",
-      "          13, 281, 282, 283, 284, 285, 272, 229, 107, 153, 286, 178,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1092, 1093, 1094, 1095, 1096,  203,  500, 1097, 1098,   90,   81, 1099,\n",
-      "         1095, 1096,  203,  500, 1097, 1098,   90, 1100, 1101, 1102,  912, 1095,\n",
-      "         1096,  203,  500, 1097, 1098,   90,  942, 1101, 1103,  219, 1092, 1095,\n",
-      "         1096, 1097, 1098,  346, 1104,  171,   15,   20,   71,  219, 1092, 1095,\n",
-      "         1096, 1050, 1105, 1106, 1050, 1107,  500,  423,  486,  102,   90, 1108,\n",
-      "           90,  546,  466, 1109,  548,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,   13,   19,  116,   16,   29,   18,\n",
-      "           16,   20,   18,  230,   17,   13,   34,  885,   16,  125,  886,   18,\n",
-      "           13,   91,   19,  887,   26,   34,  887,   93,  251,  888,  125,  254,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  125,   15,   16,   17,   18,   18,   34,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,   21,   18,   10,   29,  139,   65,  457,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1398, 1399, 1400, 1401,  980, 1402, 1403,  662,  980, 1404, 1405, 1406,\n",
-      "         1407,  528, 1408, 1405, 1059,  530,  405,  216,  528, 1408, 1398, 1401,\n",
-      "          528,  682,  201, 1409, 1408, 1401,  528,  682,  426, 1409, 1408, 1398,\n",
-      "         1408, 1401,  528,  682,  351, 1409, 1410, 1408, 1398,  528, 1275, 1410,\n",
-      "          528, 1411,   60,  430,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 800,  242,  801,  802,  803,  523,  451,  519,  519,  520,  102,  691,\n",
-      "          692,  798,  804,  519,  158,  182,   34,   85,  117,  451,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 397, 1050,  338, 1051, 1052, 1051, 1053, 1054,  324, 1055, 1056, 1057,\n",
-      "          397, 1051, 1053, 1054, 1058, 1059,  217,  397,  338, 1051, 1052, 1051,\n",
-      "         1053, 1054, 1060, 1061,  121, 1062,  102, 1063,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93,   10,   36,   13,   19,  125,   36,   13,\n",
-      "           34,   36,   13,   19,   17,   36,   91,   13,   19,  125,   93,  125,\n",
-      "           10,   29,  249,  229,  290,  113,   91,   13,   93,   22,   23,  293,\n",
-      "           13,  294,   91,   19,  887,   26,   29,   93,  249,  113,   91,   13,\n",
-      "           93,   22,   23,  229,  125,  254,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 518,  519,  520,  519,  158,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   10,   12,   23,   26,   17,   25,   26,   27,   28,\n",
-      "           10,   12,   19,   17,   26,   19,   29,   26,   23,   26,   29,   26,\n",
-      "           17,   25,    9,   31,   28,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   52,   63,  102,  256,  260, 1088, 1009,  690,  455,  560, 1465,\n",
-      "           66, 1569, 1570,  172,  855, 1571,  135,  241,   28,   65,  260,  135,\n",
-      "          960,  961,  153,  256, 1088,  466,  229,  811, 1572,   53,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 501,  368,  488,  489,  490,  491,  492,  493,  494,  495,   90,  284,\n",
-      "          397,  309,  310,  496,  497,  498,  433,  502,   91,  279,   93,  279,\n",
-      "           81,  500,  488,  489,  502,   91,  279,   93,   10,  116,   16,  503,\n",
-      "           18,   16,   29,   34,  248,   15,   16,   19,   20,   13,   91,  279,\n",
-      "           19,   30,   93,   18,   18,  503,  497,  498,  433,  502,   11,   91,\n",
-      "          279,   15,   16,  506,   18,   24,   93,   10,  347,  503,  249,  507,\n",
-      "          508,  509,  311,  279,   15,   16,  506,   18,  510,   91,  174,  511,\n",
-      "          452,   20,   93,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  136,   65,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           27,   91,  125,  257,   23,   26,  170,  257,   23,   93,  175,  360,\n",
-      "          178,   79,   10,  116,   16,  228,   16,   30,   18,   18,   16,   17,\n",
-      "           18,   13,  255,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          298,   18,   34,  116,   16,   79,   15,   16,   17,   18,   18,   16,\n",
-      "           20,   18,   10,   29,  289,  139,   65,  178,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  125,   10,  126,   92,   16,   17,   18,  841,   26,  170,   10,\n",
-      "           17,   15,   16,  841,   18,   26,  162,   10,  841,   15,   16,  901,\n",
-      "           18,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 513, 2129, 2183,  373,  139,  255,  116,   16,   13,   15,   16,   17,\n",
-      "           18,   18,   16,   20,  373,   18,   34,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  373,   18,   10,   29,  139,  373,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 212,  209, 1543, 1576, 1577,  612,  775, 1578, 1579, 1580, 1581, 1582,\n",
-      "         1578, 1541, 1583,  102, 1409, 1584, 1409,  212,  209, 1543, 1582,  209,\n",
-      "         1543, 1582, 1576,  212, 1582, 1585,  212, 1541, 1582, 1586,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  125,   10,   17,   15,   16,  116,   16,   21,   18,   16,   20,\n",
-      "           18,   18,   26,  170,   10,   20,   15,   16,  116,   16,   17,   18,\n",
-      "           16,   20,   18,   18,   26,  162,   10,  214,   15,   16,  116,   16,\n",
-      "           29,   18,   16,   20,   18,   18,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,   79,   10,   17,   13,   15,   16,   17,   18,   19,  248,   15,\n",
-      "           16,   36,   13,   36,   18,  822,  797,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   49,   47,  142,  822,   63,  102,  266,  815,   59,   63,  594,\n",
-      "         1599,  154,  153,  594,  155,  266,  154,  464, 1089,  594,  238,  467,\n",
-      "         2006,  465,  608,  466,  241,  470, 1599,  242,  243,  229,  107, 1568,\n",
-      "          242, 2007,  719,  720,  610,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 397, 1050,  338, 1051, 1052, 1051, 1053, 1054,  324, 1055, 1056, 1057,\n",
-      "          397, 1051, 1053, 1054, 1058, 1059,  217,  397,  338, 1051, 1052, 1051,\n",
-      "         1053, 1054, 1060, 1061,  121, 1062,  102, 1063,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   33,   35,   35,  425,   16,   33,   18,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,  229,  116,   16,   29,   18,   16,   17,   34,  116,   16,   29,\n",
-      "           18,   16,   17,   34,  116,   16,   29,   18,   16,   17,   18,   18,\n",
-      "           18,  129,  593,  995, 1159,  997,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 824,  917,  918,  919,  920,  921,  920,  922,  619,  920,  923,  924,\n",
-      "          925,  920,  249,  926,  918,  924,  927,  409,  202,  920,  313,  927,\n",
-      "          918,  333,  202,  928,  929,  918,  920,  930,  918,  931,  923,  924,\n",
-      "          932,  218,  216,  919,  920,  922,  933,  934,  923,  924,  433,  231,\n",
-      "          935,  216,  919,  920,  934,  923,  924,  433,  942,  919,  920,  934,\n",
-      "          923,  924,  433, 1796,   71,  301,  973,  919,  920,  922, 1797,  934,\n",
-      "          923,  924,  433,  131,  918,  919,  920,  918,  923,  924,  433,  229,\n",
-      "          973, 1101, 1798,  142,  973,  859,  131, 1661,  900,  131,  111,  918,\n",
-      "          923,  924,  828,  938, 1799,  947,  131,  511,  131,   85, 1800,  969,\n",
-      "          225,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,  116,   16,  230,   17,   13,   18,   16,   29,   19,\n",
-      "          114,   13,   18,  797,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  379,    9,   28,  228,   20,   65,  228,   20,  145,  151,  152,\n",
-      "          234,  141,  358,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,  151,  226,    9,   28,   65, 1856,  125,  170,  162,    7,  145,\n",
-      "          151,   53,  116,   16,  125,   15,   16,   17,   18,   18,   16,   20,\n",
-      "          230,    9,   18,  229,  230,   28,  230,   65, 1857,  125, 1858,  151,\n",
-      "          713,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 686,  687,  688,  520,  688,  689,  558,  690,  691,  102,   68,  464,\n",
-      "          692,  102,   68,  465,  690,  693,  102,   68,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1768, 2070,  256,  579, 2071, 2072,  135,  579, 2073, 2074, 1274,\n",
-      "          260,  579, 2075,  330,  328,  710, 1768, 2075, 2076, 2077, 1072, 2078,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,   92,   16,   29,   18,  273,  178,\n",
-      "           11,   12,  160,  161,   16,  277,   18,   13,   10,  114,   15,   16,\n",
-      "          278,   18,  279,  164,   79,   10,  230,   15,   16,  278,   18,  279,\n",
-      "          166,  161,   24,  167,  279,  273,  140,  141,  280,   13,  281,  282,\n",
-      "          283,  284,  285,  272,  173,   65,   92,   16,   17,   18,  286,  178,\n",
-      "           21,  287,  114,  288,   19,  182,  287,  230,  288,   34,   20,   10,\n",
-      "           23,  278,   10,   29,  249,   65,   92,   16,   29,   18,  173,  278,\n",
-      "           10,   21,  249,  642,   65,   92,   16,   29,   18,   65,   92,   16,\n",
-      "           17,   18,  289,   68,  274,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,  113,   13,   91,   19,  887,   26,   34,  887,   93,  251,  799,\n",
-      "         1066,  113,  822,   19,   29,  578,  113,   91,   13,   19,   17,   93,\n",
-      "          578,   29,   13,  254,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   26,   27,  889,   16,  170,   18,\n",
-      "           36,  889,   16,  125,   18,   36,   10,   29,   26,   27,  889,   16,\n",
-      "          125,   18,  263,  889,   16,  170,   18,   10,   19,   29,  889,   16,\n",
-      "          125,   18,  263,   91,   17,  889,   16,  125,   18,   19,  889,   16,\n",
-      "          170,   18,   93,   10,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  353,   92,  131,  370,  164,   16,  164,  181,  131,  183,  125,\n",
-      "           92,   16,   29,   18,   34,  125,   92,   16,   20,   18,   34,  125,\n",
-      "           92,   16,   30,   18,   10,   20,   26,  353,   92,   16,   30,   18,\n",
-      "           10,   91,   27,   93,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   52,   63,  102,  256,  260, 1088, 1009,  690,  455,  560,   10,\n",
-      "         1465,   66, 1569, 1570,  172,  855, 1571,  135,  241,   28,   65,  260,\n",
-      "          135,  960,  961,  153,   10,   29,  256, 1088,  466,  229,  811, 1572,\n",
-      "           53,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,   83,   16,  151,   18,  102,  114,  116,   16,   65,   18,   16,\n",
-      "           17,   18,   10,  116,   16,  228,   16,   30,   18,   18,   16,   30,\n",
-      "           18,   26,   27,  154,   10,   29,   26,   27,  155,   10,   30,  153,\n",
-      "           10,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1648, 1649, 1650, 1017, 1365,  702, 1650,  102,  530, 1651, 1652, 1017,\n",
-      "         1653,  702,   71,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  272,  273,  178,  231,  285,  272, 1469,  102,    9,   91,   17,\n",
-      "           26,   23,   93,   28,   11,   91,  228,   16,   17,   18,   26,  116,\n",
-      "           16,  117,   18,   16,   21,   18,   24,   93,   65,   11,   91,  228,\n",
-      "           16,   17,   18,   26,  116,   16,   20,  117,   18,   16,   21,   18,\n",
-      "           24,   93,   66,   91,   17,   26,  117,   93, 1470, 1245,   16,  153,\n",
-      "           18, 1245,   16,  154,   18, 1245,   16,  269,   18,  104,  234,   11,\n",
-      "           91,   29,   26,  116,   16,  117,   18,   16,   17,   18,   24,   93,\n",
-      "           91,   29,   26,  117,   93,  173,  464,   92,   16,   29,   18, 1470,\n",
-      "         1245,   16,  153,   18,  173,  464,   92,   16,   17,   18, 1470, 1245,\n",
-      "           16,  154,   18,  173,  464,   92,   16,   20,   18, 1470, 1245,   16,\n",
-      "          269,   18, 1269,  464,   92,   16,   29,    0],\n",
-      "        [ 274,  275,  276,  102,  140,  141,  280,   13,  456,  580,  282,  283,\n",
-      "          284,  285,  272,  173,   65,   92,   16,   29,   18,  286,  178, 1618,\n",
-      "         1513, 1392,  464,  173,   65,   92,   16,   29,   18,  265,   68,  142,\n",
-      "         1089,  848,   36,  848,   36, 1619,   36,  144,   36,  182, 1180,  142,\n",
-      "          512,   65,   92,   16,   17,   18,  274,  178, 1270,    9,  286,  116,\n",
-      "           16,  117,   18,   16,   20,   18,   68,   28,  173,   65,   92,   16,\n",
-      "           17,   18,  229,  145,  956,   53,  168,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 242,    9,   28,  138,  270,   65,  265,  261,   16,  155,   18,  263,\n",
-      "          261,   16,  154,   18,   10,   29,   65,  512,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1358,   13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   17,\n",
-      "           13,   34,   20,   79,   19,  105,  165,   23,  164,   13,   34,   79,\n",
-      "           19,   20,  163,   23,  164,   79,   19,   17,  163,   23,  166,  161,\n",
-      "           24,  167,   33,  807, 1647,   79,  168, 1667,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  136,  106,  228,   20,  360,  178,   79, 1489,  116,   16,   29,\n",
-      "           18,   16,   17,   18,   13,   26,  136,  192,  178,  179,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 370,   11,   12,  125,   92,   16,  131,   18,   24,   25,  181,  131,\n",
-      "          183,   83,   16,  353,   18,   92,   16,  131,   18,   26,   83,   16,\n",
-      "          125,   18,   92,   16,   20,   18,   10,   20,   26,   83,   16,  353,\n",
-      "           18,   92,   16,   21,   18,   10,   96,  424,   92,   16,  278,   10,\n",
-      "           29,   18,   15,   16,  131,   18,  116,   16,   29,   18,   16,  353,\n",
-      "           92,   16,  278,   18,   18,   10,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 482, 2186, 2187,  614, 2188, 2189,  417, 2190, 2191,   96,   96, 2192,\n",
-      "         2193, 2194, 2195, 2196,  417, 2197,  635, 2198,  614,  636,  212,  209,\n",
-      "         1206,  612, 2199,  614,  944,  212, 2200, 2201, 1990,   71,  900,  209,\n",
-      "         2200, 2201, 1990,   71, 2202, 2203,  880, 1734, 2190,   96,   96, 2192,\n",
-      "         2204, 2200,  632,  973, 2205, 2198,  614,  636,  229,  142,   91,  973,\n",
-      "           10,   17,   93,  229, 1455,  973,  212,  635,   71,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1338,  102, 1171, 1339, 1926,   71,  373, 1339, 1926, 2023,  880, 1734,\n",
-      "           61,  973, 1338,   96, 1409, 1339,  102, 1926, 1275,   83,   16, 2024,\n",
-      "           18,   10, 2025,   26,   27,   83,   16,  142,   18,   91,   83,   16,\n",
-      "           13,   18,   10,   21,   93,   22,   83,   16,  142,   18,   91,   83,\n",
-      "           16,  973,   18,   10,  105,   93,   26,   27,   83,   16,  373,   18,\n",
-      "           10,   91,   27,   93,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  129,  229,  794,   20,   15,   16,  131,   18,   19,   17,   15,\n",
-      "           16,  131,   18,  257,  993,  122,  994,  131,  138,  995,  996,  997,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,   92,   29,  273,  178,   11,   12,\n",
-      "          160,  161,   16,  277,   18,   13,   10,  228,   16,   20,   18,  114,\n",
-      "          384,  164,   79,   10,  230,  384,  166,  161,   24,  167,  384,  273,\n",
-      "          140,  141,  280,   13,  456,  580,  282,  283,  284,  285,  272,  173,\n",
-      "           65,   92,   17,  286,  178,  287,  230,   11,   91,  288,   34,  116,\n",
-      "           16,  117,   18,   16,   21,   18,   24,   93,   10,   17,  228,   16,\n",
-      "           17,   18, 1269,   65,   92,   29,  178,   65,   92,   17,  274,  178,\n",
-      "         1270,  142,   65,   92,   29,   68,  568,   65,   92,   17,  229,   36,\n",
-      "         1256,   36,  111,  142,  274,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 61, 112, 113,  91,  13,  93,  10, 174,  13,  19,  13,  34,  29, 250,\n",
-      "         113,  91,  13,  93, 251, 252, 241,  13, 294,  91,  29,  26,  34, 887,\n",
-      "          93, 249,  26,  29,  22, 116,  16,  13,  19,  29,  18,  16, 174,  13,\n",
-      "          18,  22,  13,  61, 162, 257,  29, 241,  13, 294,  91,  23,  26,  29,\n",
-      "          93, 249,  29,  34,  91, 162,  19,  29,  93,  13, 257, 162,  15,  13,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7,   8,   9,  10,  12,  13,  36,  13,  22,  29,  25,  26,  27,  28,\n",
-      "          10,  11,  12,  13,  36,  20,  15,  16,  13,  18,  22,  29,  24,  25,\n",
-      "          26,  27,  27,  36,   4,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 61, 112, 113,  91,  13,  93,  10,  36,  17,  13,  34,  29,  36,  34,\n",
-      "          36,  13,  19,  29,  36, 292,  79,  10, 113,  91,  13,  93, 797,  13,\n",
-      "         294, 118,  23,  26,  34, 887,  93, 249, 113,  91,  13,  93, 578, 641,\n",
-      "          34, 170, 229, 125, 170, 111,   3,   3,   3,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [127, 231, 129, 355, 125,  10,  19,  29, 130, 353,  10,   3,   3,   3,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   10,   12,   29,   26,   20,   26,   30,   26,  133,\n",
-      "           25,   26,   28,   10,   12,   17,   26,   20,   26,   21,   26,   30,\n",
-      "           25,    9,   31,   28,   10,   91,   27,   93,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  272,  273,  178,  274,  275,  276,  102,  173,   65,   92,   29,\n",
-      "          273,  178,   11,   12,  160,  161,   16,  277,   18,   13,   10,  114,\n",
-      "           15,   16,  278,   18,  279,  164,   79,   10,  230,   15,   16,  278,\n",
-      "           18,  279,  166,  161,   24,  167,  279,  273,  140,  141,  280,   13,\n",
-      "          281,  282,  283,  284,  285,  272,  173,   65,   92,   17,  286,  178,\n",
-      "           21,  287,  114,  288,   19,  182,  287,  230,  288,   34,   20,   10,\n",
-      "           23,  278,   10,   29,  249,   65,   92,   29,  173,  278,   10,   21,\n",
-      "          249,  229,   65,   92,   29,   65,   92,   17,  289,   68,  274,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  248,   15,   13,   91,   17,\n",
-      "           13,   19,   29,   93,   19,  641,   34,  125,  125, 1737,   29, 1181,\n",
-      "         1546,   13,   92,   23,  113,   91,   13,   92,   23,   93, 1737,   23,\n",
-      "          125,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  290,  291,   61,  125,   26,  170,   26,  162,  294,  573,   26,\n",
-      "          125,   34,  170,   34,  162,   10,   23,   26,  574,   10,   29,  241,\n",
-      "          575,  540,  576,  756,   16,  125,  170,  162,  125,  170,  162,  168,\n",
-      "          241,  577,   12,  125,   26,  170,   26,  162,   25,  165,  228,  118,\n",
-      "           20,  119,   16,   21,   18,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1200, 1201, 1202,  249, 1203, 1204, 1205,  181, 1206, 1207, 1208,  464,\n",
-      "          502,  465,  102, 1209, 1210,  102,  733, 1200,  355, 1205, 1211, 1204,\n",
-      "           71,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1594, 2000, 2001,  180,   11,   12,  125,   92,   16,  131,   18,   24,\n",
-      "           25,   11,   12,  125,   92,   16,  131,   18,   24,   25,  682, 2002,\n",
-      "          183,  171, 2003,  171, 2003,  378,   83,   16,  278,   18,  578,   17,\n",
-      "           83,   16,  171,   18,   26,   83,   16,  125,   18,   92,   16,   29,\n",
-      "           18,   26,   83,   16,  125,   18,   92,   16,   17,   18,   26,  721,\n",
-      "           26,   83,   16,  125,   18,   92,   16,   83,   16,  278,   18,   18,\n",
-      "          102,  307,  307,  171, 2000, 2001,  180,  682,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  750,   63,   19,    9,   92,   16,   29,   18,   28,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   29,   18,   66,   92,   16,   29,   18,\n",
-      "           59,   63,   52,   68,  256,  558,  468,   92,   16,   29,   18,  814,\n",
-      "          172,  821,   92,   16,   29,   18,  241,  814,  815,  242,  472,   92,\n",
-      "           16,   29,   18,   65,   92,   16,   29,   18,  603,    9,   92,   16,\n",
-      "           29,   18,  256,  229,  607,   28,   19,  821,   19,   65,   92,   16,\n",
-      "           29,   18,  720,  610,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  106,    9,  177,  278,  107,  277,  104,   65,   91,   13,   19,\n",
-      "           17,   93,   15,   16,   17,   18,   34,   91,   79,   19,   20,   93,\n",
-      "           15,   16,   17,   18,   10,   29,  515,   68,  464,  465,  362,  229,\n",
-      "          278,  254,  261,   16,   83,   16,  848,   18,   18,  263,  261,   16,\n",
-      "           83,   16,  849,   18,   18,   10,  298,   62,  140,  141,  229,   36,\n",
-      "          470,   36,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 173,   79,   10,   13,   15,   16,   17,   18,   34,  116,   16,   29,\n",
-      "           18,   16,   13,   18,   68,  990,   29,  584,   17,  991,  579,  176,\n",
-      "          178,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1114,  969, 1115, 1116,   96,  417,  445, 1117, 1118, 1119, 1120,  869,\n",
-      "         1121,  734, 1122, 1122,  670, 1121, 1123,  271,  272,  273,  178,  274,\n",
-      "          275,  276,  102,  173,   65,  273,  178,   11,   12,  160,  161,   16,\n",
-      "          277,   18,   13,   10,  116,   16,   29,   19,  279,   15,   16,   17,\n",
-      "           18,   18,   16,   29,   34,  279,   15,   16,   17,   18,   18,  164,\n",
-      "           79,   10,  116,   16,   21,  279,   18,   16,   29,   34,  279,   15,\n",
-      "           16,   17,   18,   18,  166,  161,   24,  167,  279,  273,  140,  141,\n",
-      "           62,  280,   13,  456,  580,  282,  283,  284,  285,  272,  107,  277,\n",
-      "          286,  178,   17,  373,  114,  288,   34,  228,   16,   20,   18,  287,\n",
-      "          230,  288,   34,  482,   10,   23,  229,   65,  277,  274,  178,  229,\n",
-      "           65,   68,  277,  358,  111,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  230,   36,   13,   36,   34,   36,\n",
-      "          230,   13,   36,  385,   99, 1062,  113,   13, 1222,  113,   13,  546,\n",
-      "           11,   91,  116,   16,  117,   18,   16,   17,   18,   26,  117,   24,\n",
-      "           93,  251,  888,  113,   13,  118,   19,  117,   26,  117,  119,  253,\n",
-      "          113,   13,  168, 1063, 1062, 1148,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   92,   16,   29,   18,   10,  116,   16,  117,   18,   16,   21,\n",
-      "           18,   13,   92,   16,   17,   18,   10,  116,   16,   20,  117,   18,\n",
-      "           16,   21,   18,  112,  113,   91,   13,   93,   10,  230,  115,   13,\n",
-      "           91,  115,  257,   23,   93,  138, 1397, 1113,   68,  115,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   91,   13,  294,  296,   16,  573,\n",
-      "           18,   93,  113,   91,   19,   13,   93,   10,   17,   19,  113,   91,\n",
-      "           13,   93,  112,   79,   10,  116,   16,   13,   34,   29,   18,   16,\n",
-      "           13,   18,   79,   10,  113,   91,   13,   93,  797,  267,   11,   91,\n",
-      "           13,   92,   16,   29,   18,   26,   79,   92,   16,   29,   18,   24,\n",
-      "           93,   26,   27,   11,   91,   13,   92,   16,   17,   18,   26,   79,\n",
-      "           92,   16,   17,   18,   24,   93,   26, 1026,   26,   11,   91,   13,\n",
-      "           92,   16,  171,   18,   26,   79,   92,   16,  171,   18,   24,   93,\n",
-      "          424,   92,   16,   35,   10,   29,   18,   15,   16,  171,   18,   11,\n",
-      "           91,   13,   92,   16,   35,   18,   34,   79,   92,   16,   35,   18,\n",
-      "           24,   93,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93, 1423,  573,  113,   91,   13,   34,\n",
-      "           29,   93,   10,   17,  113,   91,   13,   93,   13,  294,   91,   23,\n",
-      "           26,   29,  119,  249,  113,   91,   13,   93,   10,   13,   91,   13,\n",
-      "           19,   29,   93,  378,   13,  294,   91,   19,  887,   26,  171,  119,\n",
-      "          113,   91,   13,   93,  165,   19,  116,   16,  134,   18,   16,  366,\n",
-      "           18,  171,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  174,   36,   17,   13,   34,\n",
-      "           29,   36,   19,  174,   36,   17,   13,   19,   29,   36,  113,   91,\n",
-      "           13,   93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  114,   17,   13,   34,  105,  114,\n",
-      "           11,   91,  116,   16,  117,   18,   16,   17,   18,   19,   13,   24,\n",
-      "           93,  168,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 113,   91,   13,   93,   10,  114,   13,   19,  230,   13,  118,   19,\n",
-      "          125,   26,  125,  119, 1627,  112,  125,  168,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  226,    9,   28,   65,  125,  170,  162,\n",
-      "           17,  170,  114,   28,   10,  125,  114,   65,   34, 1597,  114,    9,\n",
-      "           28,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  882, 1698, 1895,  558,  107,  242, 1393, 1074,  647, 1393, 1896,\n",
-      "          882,  877, 1065,   53,  168,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738,  121,  463, 1461,   26, 1462,  363,  151,  812, 1463,  242,  979,\n",
-      "          153,   10,   29,   26,  814,   10,  562,   10,   17,  239, 1464,   10,\n",
-      "          351,   15,   16,   82,   18,  153,   26,  154, 1084,  814,  562,  455,\n",
-      "          951, 1465,  231,  241,  121,  102,  960,    9,   26,   65,   26,  260,\n",
-      "           26,   66, 1116,  718,  242,  151,  172,  242, 1466, 1467,  102,  811,\n",
-      "         1468,   53,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301, 1424,  370,   16,  181,  131,  183,  125,   92,   16,   21,   18,\n",
-      "           34,  125,   92,   16,   30,   18,   10,  354,   26,   27,  353,   92,\n",
-      "           16,  105,   18,   10, 1697,   26,   11,   12,  125,   92,   16,  131,\n",
-      "           18,   24,   25,  795,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  180,   11,   12,  125,   92,   16,  131,   18,   24,   25,  181,\n",
-      "          131,  183,   83,   16,  353,   18,   92,   16,  131,   18,   10,   29,\n",
-      "           34, 1348,   83,   16,  125,   18,   92,   16,  131,   18, 1348,  572,\n",
-      "           23,  241,   11,   12,  125,   92,   16,  131,   18,   24,   25,  132,\n",
-      "          914,  526,  527,   83,   16,  353,   18,   92,   16,   30,   18,   10,\n",
-      "          116,   16, 2004,   18,   16, 2005,   18,  229, 1349,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  139,  135,   92,   16,   29,   18,   91,   19,   29,\n",
-      "           26,   23,   93,   26,  135,   92,   16,   17,   18,   91,   29,   26,\n",
-      "           23,   93,  135,   92,   16,   17,   18,  107,   65,  515,    9,   28,\n",
-      "          362,   11,   36, 1162,   92,   16,   17,   18,   24,   36,   10,   17,\n",
-      "           11,   36,  135,   92,   16,   17,   18,   28,   24,   36,   26,   36,\n",
-      "          153,   36,   10,   11,   36,  562,   92,   16,   29,   18,   24,   36,\n",
-      "           65,  178,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  174,   13,   34,  641,   15,\n",
-      "           16,   17,   18,   34,   91,   17,  125,   34,   29,   93,   13,  250,\n",
-      "          113,   91,   13,   93,  251, 1316,  125,   22,   23,  249,   26,  241,\n",
-      "          113,   91,   13,   93,  163,   19,  116,   16,   20,   18,   16,   21,\n",
-      "          125,   18,   19,   17,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,   68,  465,   52,   63,   64, 1412, 1413,  236,  242, 1413,  815,\n",
-      "          242,   63,  464, 1089,  561,  466,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  174,   13,   19,  116,   16,\n",
-      "           13,   34,   29,   18,   16,   13,   19,   29,   18,  250,  113,   91,\n",
-      "           13,   93,  251,  252,  241,  113,   91,   13,   93,  380,  381,  138,\n",
-      "          253,   61,   13,   92,   16,   23,   18,  113,   91,   13,   93,  253,\n",
-      "          241,  173,   79,   10,  174,   13,   68,    9,   11,   91,   13,   92,\n",
-      "           16,   23,   18,   26,  174,   13,   92,   16,   23,   18,   24,   93,\n",
-      "          579,  176,  173,   79,   10, 2206,   16,  248,   18,   15,   16,   13,\n",
-      "           18,  176,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 368,  369,   17,   15,   16,   13,   18,   19,   17,   15,   16,   79,\n",
-      "           18,   22,   20,   15,   16,   19,   13,   18,   19,   20,   15,   16,\n",
-      "           19,   79,   18,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  226,    9,  584,   28,  584,   65,  125,\n",
-      "          584,  170,  584,  162,    7,   83,   16,  170,   18,  230,   83,   16,\n",
-      "           65,   18,   34,   83,   16,  162,   18,  230,   83,   16,   28,   18,\n",
-      "           10,   21,   83,   16,  125,  886,   28,   18,  230,   83,   16,   65,\n",
-      "           18,   26,   27,   83,   16,  170,   18,   15,   16,   17,   18,   34,\n",
-      "           83,   16,  162,   18,   15,   16,   17,   18,   19,   83,   16,  125,\n",
-      "           18,   15,   16,   17,   18,   10,  134,  145,   83,   16,  151,   18,\n",
-      "           53,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,   68,    9,  584,   28,  140,  141,   62,  736,   36,  153,   36,\n",
-      "           10,    9,  150,  464,  106,    9,  584,   28,  107,   13,   34,   17,\n",
-      "           10,   23,  357,    9,  107,   13,   34,   79,   10,   23,  229,  150,\n",
-      "          464,  523,  270,  142,    9, 1182,  249,   36, 1183,   36,   19,   36,\n",
-      "         1184,   36, 1185,  449,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10, 1112,   15,   16,   13,   18,\n",
-      "           19,  174,   13,   19,   29,   61,   13,   10,   17,  113,   91,   13,\n",
-      "           93, 1113,   68,  229,  125,  914,  113,   91,   13,   93,  251,  546,\n",
-      "          241,  125,  589,  116,   16,   29,   18,   16,  248,   18,  249,  113,\n",
-      "           91,   13,   93,  589,   23,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  135,  136,  162,  137,   13,   15,   16,   17,   18,   19,  116,\n",
-      "           16,   79,   15,   16,   17,   18,   18,   16,  134,   18,   10,   29,\n",
-      "          259,  139,  142,   65,  258,  808,  238,    9,   91,   23,   26,  105,\n",
-      "          228,   16,  105,   18,   93,  145,   83,   16,  809,   18,  713,  588,\n",
-      "           56,   53,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   11,   12,  160,  161,   16,\n",
-      "         1079,   18,   13,   34,   29,   26,  744,   13,  163,   23,  164,   17,\n",
-      "           15,   16,   13,   18,   26,  744,   13,  257,   23,  166,  161,   24,\n",
-      "          167,  113,   91,   13,   93,   34,  113,   11,   91,   13,   19,  116,\n",
-      "           16,   29,   18,   16,   17,   18,   24,   93,  257,   29,   13,  254,\n",
-      "         1533,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7, 1223, 1165, 1186,  132,   11,   12,  125,   92,   16,  131,   18,\n",
-      "           24,   25,  181,  183,  483,  125,   92,   16,   30,   18,   10,   20,\n",
-      "          125,   92,   16,  170,   18,   34,   21,  125,   92,   16,   29,   18,\n",
-      "          125,   92,   16,   20,   18,   10,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   11,   12,  160,  161,   16,\n",
-      "         1079,   18,   29,   34,  126,   92,   16,   17,   18,   91,   17,   19,\n",
-      "           13,   93,   26,  744,   13,   22,   29,  164,   17,   15,   16,   13,\n",
-      "           19,   29,   18,   26,  744,   13,  589,   29,  166,  161,   24,  167,\n",
-      "          113,   91,   19,   17,   93,   34,  113,   11,   91,  126,   92,   16,\n",
-      "           17,   18,  298,   24,   93,   10,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  232,  233,  353,  524, 1003, 1004,  719,  609,  741,  116,   16,\n",
-      "          133,   18,   16,  134,   18, 1003,  232,   59, 1074, 1075,  703,   15,\n",
-      "           16,   82,   18,  145,   83,   16, 1629,   18,   53,   30,  228,   16,\n",
-      "          483,   18,  232,  245,   53,  179,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   11,   12,  125,   92,   16,  131,   18,   24,   25,  795,  370,\n",
-      "           83,   16,  353,   18,   92,   16,  131,   18,   11,   12,  125,   92,\n",
-      "           16,  131,   18,   24,   25,  181,  131,  183,   83,   16,  353,   18,\n",
-      "           92,   16,  134,   18,   10,   21,   83,   16,  353,   18,   92,   16,\n",
-      "           21,   18,  125,   92,   16,   96,   18,   10,   91,   27,   93,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,  102, 1423, 1531,  112,   79,   10,   96,   15,   16, 1532,   13,\n",
-      "           18, 1423, 1531,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 363,   83,   16,  151,   18,  226,    9,   26,   28,   26,   65,  125,\n",
-      "           26,  170,   26,  162,   26,   61,   91,  230,   28,   19,  230,   65,\n",
-      "           93,   15,   16,   17,   18,   10,  230,   15,   16,   17,   18,    9,\n",
-      "           19,  230,   28,  230,   65,  229,    9,  228,   16,   17,   18,  125,\n",
-      "           34,  170,   10,   17,  162,  584,  229,  230,   65,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   68,    9,   28,  169,  261,   16,   83,   16,  155,   18,   18,\n",
-      "           10,   91,   19,   21,   26,   19,   20,   93,  169,  261,   16,   83,\n",
-      "           16,  154,   18,   18,   10,   91,   27,   93,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,   92,   16,   29,   18,  137,   11,\n",
-      "           12,  160,  161,   16,  277,   18,   13,   10,  279,  114,  384,  164,\n",
-      "           79,   10,  279,  230,  384,  166,  161,   24,  167,  279,  273,  279,\n",
-      "          572,   23,   23,  163,  384,  163,  117,   62,  280,   13,  281,  282,\n",
-      "          283,  285,  272,  102,  173,   65,   92,   16,   17,   18,  137,  287,\n",
-      "           10,   17,  230,  288,   65,   92,   16,   20,   18,  137,  287,   10,\n",
-      "           17,  228,   16,   20,   18,  114,  288,  229,   65,   92,   16,   17,\n",
-      "           18,   65,   92,   16,   20,   18,  267,  274,   65,   92,   16,   29,\n",
-      "           18,   65,   92,   16,   17,   18,  374,  853,    9,   65,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   20,   18,  374,  853,   28,  229,   36,\n",
-      "          153,   36,  168,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,   91,   13,   93,   10,  641,   15,   16,   17,   18,   19,\n",
-      "          641,   19,   13,  174,   13,  113,   91,   13,   93,  589,   23,  229,\n",
-      "          125,  241,  113,   91,   13,   93, 1181, 1964,   68,   13,   92,   16,\n",
-      "           23,   18,   16,  248,   18,   15,   16,   19,   17,   18,   22,   16,\n",
-      "          113,   18,   11,   91,   16,   13,   18,   92,   16,   23,   18,   24,\n",
-      "           93,   22,   17,   15,   16,   19,   17,   18,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 763,  764,   40,  765,  766,  767,  768,  769,  770,  771,  226,  772,\n",
-      "          773,   58,  774,  775,  776,  777,  778,  779,  780,  781,  777,  231,\n",
-      "          777,  782,  232,  783,  777,  782,  784,  785,  786,  777,  782,   50,\n",
-      "          786,  787,  782,  247,  781,  777,  788,    7,  789,  777,  247,  510,\n",
-      "          790,  791,  786,  792,  510,  793,  794,  781,  777,  510,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,   17,  230,   11,   91,   17,   13,   34,  116,   16,\n",
-      "          117,   18,   16,  105,   18,   24,   93,  797,  259,  876,  116,   16,\n",
-      "           29,   18,   16,   21,   18,  123,  877,  797,  112,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  107,  277,   92,   16,   29,   18,  273,  178,\n",
-      "           11,   12,  160,  161,   16,  277,   18,   13,   10,   17,   34,  279,\n",
-      "          164,   79,   10, 1317,  166,  161,   26,   27,   91,  279,  478,   16,\n",
-      "          479,   18,   93,   24,  167,  107,  277,   92,   16,   17,   18,  273,\n",
-      "          178,   11,   12,  160,  161,   16,  277,   18,   83,   16,   13,   18,\n",
-      "           10,   19,   17,   34,   83,   16,  171,   18,  164,   83,   16,   79,\n",
-      "           18,   10,  116,   16,   83,   16,  171,   18,   18,   16,   83,   16,\n",
-      "          278,   18,   18,   27,   26,   27,   91,   83,   16,  171,   18,  478,\n",
-      "           16,  479,   18,   93,  167,  478,   16,   61,   18,  277,   92,   16,\n",
-      "           29,   18,  478,   16, 2020,   18,  277,   92,   16,   17,   18,  478,\n",
-      "           16, 2021,   18,   83,   16,  142,   18,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 274,  275,  276,  102,  173,   65,   92,   29,  137,   11,   12,  160,\n",
-      "          161,   16,  277,   18,   13,   10,  885,   16,  279, 1513,   18,  384,\n",
-      "          164,   79,   10,  521,  384,  166,  161,   24,  167,  279,  273,  279,\n",
-      "          572,   23,  991,   23,  578,  384,  578,  117,   62,  280,   13,  281,\n",
-      "          282,  283,  285,  272,  102,  173,   83,   16,   65,   18,   92,   16,\n",
-      "           17,   18,  137,  287,   10,   17,  230,  288,   83,   16,   65,   18,\n",
-      "           92,   16,   20,   18,  137,   27,  287,   10,   17,  228,   16,   20,\n",
-      "           18,  114,  288,  229,   65,   92,   29,   65,   92,   17,  267,  274,\n",
-      "           65,   92,   29,   65,   92,   17,  374,  853,    9,   65,   92,   16,\n",
-      "           29,   18,   65,   92,   17,  374,  853,   28,  229,   36,  153,   36,\n",
-      "          168,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,  116,   16,   17,   13,   15,   16,   20,   18,   18,\n",
-      "           16,   17,   15,   16,   13,   18,   34,   17,   15,   16,   19,   13,\n",
-      "           18,   18,  120,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  135,  136,   65,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,\n",
-      "           29,  125,  170,  259,  139,   62,  140,  141, 1416,  604,  104,  104,\n",
-      "           13,   15,   16,   17,   18,   34,   79,   15,   16,   17,   18,   10,\n",
-      "          125,   15,   16,   17,   18,  515,  142,  568,  362,   36, 1256,   36,\n",
-      "           36, 1416,   36,   65,  457,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93, 1594,  573, 1066,   13,  294,   91,\n",
-      "           19,  887,   26,   23,   93,  249,  113,   91,   13,   93,   10,   17,\n",
-      "           13,   15,   16,   20,   18,   34,   13,   15,   16,   17,   18,  113,\n",
-      "           91,   17,   93,  179,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 396,  397,  398,  399,  400,  401,  402,  403,  404,  405,  397,  406,\n",
-      "          402,  403,  407,   53,  408,  409,  410,  410,  102,  411,  412,  413,\n",
-      "          414,   85,  415,  405,  416,   90,   11,   91,   13,   92,   16,   35,\n",
-      "           18,   26,   79,   92,   16,   35,   18,   24,   93,   91,   35,   10,\n",
-      "           29,   26,   17,   26,   94,   26,   85,   93,   26,   13,   92,   16,\n",
-      "           35,   18,   79,   92,   16,   35,   18,  417,   35,  418,  419,  420,\n",
-      "          421,   81,  422,  402,  403,  423,  424,   92,   16,   35,   10,   29,\n",
-      "           18,   15,   16,   85,   18,   13,   92,   16,   35,   18,   10,  351,\n",
-      "           27,   26,   27,  424,   92,   16,   35,   10,   29,   18,   15,   16,\n",
-      "           85,   18,   79,   92,   16,   35,   18,   10,  318,   27,   26,   27,\n",
-      "          424,   92,   16,   35,   10,   29,   18,    0],\n",
-      "        [  61,   62,  140,  141,  107,   13,   10,  125,  136,   65,  116,   16,\n",
-      "           13,   15,   16,   17,   18,   18,   16,  125,   15,   16,   17,   18,\n",
-      "           18,   19,  116,   16,   79,   15,   16,   17,   18,   18,   16,  170,\n",
-      "           15,   16,   17,   18,   18,   10,   29,   91,  125,  257,   23,   26,\n",
-      "          170,  257,   23,   93,  359,  360,  361,   66,  256,  362,  145,  364,\n",
-      "           53,   65,  365,  111,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 314,  917, 1194, 1286,  447, 1287, 1288, 1289, 1290, 1291,  202, 1292,\n",
-      "         1291,  202, 1094, 1293, 1287, 1294, 1291,  202, 1295,  534, 1296, 1297,\n",
-      "         1298, 1299, 1300,  534, 1192,   81, 1192, 1301,  214, 1300,  333, 1302,\n",
-      "         1192, 1274,  546,   85,  214, 1300, 1303, 1302, 1192, 1301,   85, 1300,\n",
-      "          409, 1302, 1304, 1286,  917,  217,  181,  922, 1304, 1305, 1192,   90,\n",
-      "         1100, 1101, 1102, 1192, 1274,  546,  942, 1192, 1274,  546,   71,  229,\n",
-      "         1304, 1287, 1300,  973,   81, 1302, 1101, 1798,   61, 1304, 1298, 1287,\n",
-      "          832, 1306,   81,  202, 1304, 1287, 1288,  131,   81, 1302,  249, 1306,\n",
-      "          766, 1866,  168,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 417,  463,   63,  102,  153,  594,  265,  142, 2010,   65,  234,  813,\n",
-      "          357, 2011,  261,   16,   83,   16, 1963,   18,   18,   10, 1348,  261,\n",
-      "           16,   83,   16,  153,   18,   18,   34, 1868,  261,   16,   83,   16,\n",
-      "          594,   18,   18, 1348,   34, 1868,  168,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  91,   13,   34,   79,   93,   91,   17,   13,   19,   79,   93,   15,\n",
-      "           16,   30,   18,  582,  102,   13,   15,   16,   20,   18,   79,   15,\n",
-      "           16,   20,   18,  583,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1534, 1535, 1536,  212,  209, 1537, 1538, 1539, 1540, 1535,  212,  209,\n",
-      "         1535, 1541,  209, 1535,  733, 1542, 1543, 1535, 1541, 1543, 1535,  733,\n",
-      "         1544, 1535,  733,  212, 1535,  733,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  116,   16,  248,   15,   16,\n",
-      "           13,   18,   18,   16,   13,   34,  125,   18,   26,  113,   15,   16,\n",
-      "          522,   18,   91,   29,   93,   10,  116,   16,  248,   18,   16,   21,\n",
-      "           18,   26,  125,   10,    4,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,   17,   13,   15,   16,   17,   18,   19,  248,   15,\n",
-      "           16,   36,   13,   36,   18,  822,  797,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    9,  513,   65,  137,   79,   15,   16,   17,   18,   10,   17,\n",
-      "          514,   91,  373,  257,   23,   93,  238,   68,    9,   65,  139,  358,\n",
-      "          298,   79,  456,  358,  373,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   10,   12,   29,   26,   17,   26,   20,   25,   26,\n",
-      "           28,   10,   12,   17,   26,   20,   26,   21,   25,    9,  644,   28,\n",
-      "           10,   91,   27,   93,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   36,   13,   34,   29,   36,\n",
-      "           19,   36,   17,   13,   19,   20,   36,  839,  121,  964,  794,   79,\n",
-      "           10,  113,   91,   13,   93,  797,  842,  229,  290,   36,  113,   91,\n",
-      "           13,   93,   36,  257,   29,  293,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1213, 1214,   52,   51, 1215, 1216,  292,  688,  520,  688,  158,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,   83,   16,  135,   18,   92,   16,   29,   18,   26,   83,   16,\n",
-      "          135,   18,   92,   16,   17,   18,  255,   65,  138,  139,  142,   65,\n",
-      "          238,   83,   16,  146,   18,   92,   16,   29,   18,  172,   83,   16,\n",
-      "          146,   18,   92,   16,   17,   18,  239,   83,   16,  146,   18,   92,\n",
-      "           16,   17,   18,   83,   16,  135,   18,   92,   16,   29,   18,   10,\n",
-      "          351,   15,   16,   82,   18,   65,  457,   91,   27,   93,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738,   61,  180,   11,   12,  125,   92,   16,  131,   18,   24,   25,\n",
-      "          125,   92,   16,   29,   18,   10,   20,   26,  125,   92,   16,  131,\n",
-      "           34,   29,   18,   10,   20,  125,   92,   16,  131,   18,   19,   21,\n",
-      "          131,  423,  125,   92,   16,   29,   18,   26,  125,   92,   16,   17,\n",
-      "           18,  739,   11,   12,  125,   92,   16,  131,   18,   24,   25,  526,\n",
-      "          527,  241,  229,  180,   11,   12,   17,   15,   16,  131,   18,  125,\n",
-      "           92,   16,  131,   18,   24,   25,  181,  131,  183,  353,   92,   16,\n",
-      "          131,   18,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301,   83,   16,  353,   18,   92,   16,  131,   18,  132,   11,   12,\n",
-      "          125,   92,   16,  131,   18,   24,   25,  181,  131,  183,    7,   83,\n",
-      "           16,  353,   18,   92,   16,   17,   18,   10,   17,   26,   27,   83,\n",
-      "           16,  353,   18,   92,   16,   20,   18,   10,   19,  105,  229,   11,\n",
-      "           12,  125,   92,   16,  131,   18,   24,   25,  526,  527,  229,   83,\n",
-      "           16,  353,   18,   92,   16,  131,   18,  554,  353,   92,   16,  131,\n",
-      "           34,   29,   18,   26,   27,  353,   92,   16,  131,   18,   26,   27,\n",
-      "          353,   92,   16,  131,   34,   17,   18,  985,  370,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93, 1222,   13,   22,   23,  249,  113,   91,\n",
-      "           13,   93,   10,  174,   91,   19,   13,   93,   34,   20,   13,  173,\n",
-      "           79,   10,  113,   91,   13,   93,   68,  579,  176,  178,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,   83,   16,  151,   18,  226,   83,   16,    9,   18,   26,   27,\n",
-      "           83,   16,   28,   18,   26,   27,   65,   83,   16,  125,   18,   26,\n",
-      "           27,   83,   16,  170,   18,   26,   27,   83,   16,  162,   18,  167,\n",
-      "           27,  145,   83,   16,  151,   18,   53,  116,   16,   83,   16,  125,\n",
-      "           18,   15,   16,   17,   18,   34,   83,   16,  170,   18,   15,   16,\n",
-      "           17,   18,   19,   83,   16,  162,   18,   15,   16,   17,   18,   18,\n",
-      "           16,   21,   18,  164,  164, 1777,   16,   65,  164, 2026,  164,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  124,  125,   10,  126,   92,   16,   20,   18,   17,   26,  170,\n",
-      "           10,  126,   92,   16,   30,   18,   20,   26,  162,   10,  116,   16,\n",
-      "           17,   18,   16,   20,   18,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  232,  233,  353,  524, 1003, 1004,  352, 1003,  232,   59, 1074,\n",
-      "         1075,  596,   15,   16,   82,   18,  145,   83,   16, 1629,   18,   53,\n",
-      "          232,  247,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1536, 1587, 1535,  102,  530,  414, 1587, 1588,  530,  414, 1587, 1589,\n",
-      "         1590, 1535,  433,  754, 1591, 1535,  433,   71,   91,   27,   93,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,   32,   33,   91,   33,   19,   29,   93,   27,   35,   10,   29,\n",
-      "           34,   35,   33,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  68,  107,   79,   10,  278,   91,   13,   34,   29,   93,  358,  168,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  226,    9,   28,   65,  125,  170,  162,    7, 1680, 1681,\n",
-      "           28, 1667,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,    7,  459,  460,  151,   19,    9,   92,   16,   29,   18,   28,\n",
-      "           92,   16,   29,   18,   65,   92,   16,   29,   18,   59,  236,  461,\n",
-      "          462,   92,   16,   29,   18,   65,   92,   16,   29,   18,   65,  463,\n",
-      "          464,   26,  465,  154,   26,   28,   92,   16,   29,   18,   65,   92,\n",
-      "           16,   29,   18,  466,  142,  467,  238,   28,   92,   16,   29,   18,\n",
-      "           65,   92,   16,   29,   18,  142,  242,  361,  153,  256,   26,  361,\n",
-      "          155,  135,  241,  468,   92,   16,   29,   18,  469,  469,  470,   26,\n",
-      "          242,    9,   92,   16,   29,   18,  471,  172,  242,  472,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   29,   18,  135,   61,   62,  363,    9,\n",
-      "           92,   16,   29,   18,   28,   92,   16,   29,   18,   65,   92,   16,\n",
-      "           29,   18,   64,  473,   10,  153,   10,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1534, 1535, 1536,  212,  209, 1537, 1538, 1539, 1540, 1535,  212,  209,\n",
-      "         1535, 1541,  209, 1535,  733, 1542, 1543, 1535, 1541, 1543, 1535,  733,\n",
-      "         1544, 1535,  733,  212, 1535,  733,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  647,  384,  233,  140,  141, 1076,   13,  456, 1077,  282,  455,\n",
-      "         1078, 1067,  362,    9,   91,   29,   26,  125,   93,   26,   28,   27,\n",
-      "           91,   17,   26,  170,   93,  114,   17,  125,   10,  116,   16,   17,\n",
-      "           18,   16,   20,   18,   36,  125,   19,  170,   36,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  113,   13, 1066,   13, 1661,  249,  113,   91,   13,   93,   10,\n",
-      "           83,   16,  248,   18,   15,   16,   13,   18,   19,   29,   13,  249,\n",
-      "          113,   13,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  91,   29,   34,   35,   93,   91,   17,   34,   35,   93,   10,   91,\n",
-      "           27,   93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  91,   29,   34,   35,   93,   91,   17,   19,   35,   93,   10,   91,\n",
-      "           27,   93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  116,   16,   29,   18,   16,\n",
-      "           20,   18,   13,   15,   16,   20,   18,   19,  125,   11,   91,   13,\n",
-      "           15,   16,   17,   18,   34,   13,   34,   29,   24,   93,  125,  229,\n",
-      "          113,   91,   13,   93,  251,  546,  241,  113,   91,   13,   93,  253,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   33,   10,  116,   16,   29,   19,   35,   18,   16,   29,   34,\n",
-      "           35,   18,   34,   17,   35,   36,   33,   36,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [2119,  190, 2120, 2121, 2122, 2123,  190,  102, 1731,  530,  987,  221,\n",
-      "         2124, 2125,  414,  216, 1729,  973, 1156, 2120, 2126, 2024,   10,  179,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,    9,  584,   28,  173,   65,  137,   27,   79,   10,  116,   16,\n",
-      "           13,   15,   16,   17,   18,   18,   16,   21,   18,  362,    9,   28,\n",
-      "         1046,   21,  229,  107,  153,  177,   61,  464,  173,   65,  238,   65,\n",
-      "          464,  579,  176,  107,  153,  382,   83,   16,  467,   18,  172,   83,\n",
-      "           16, 1047,   18,  229,  107,  153,  178,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  800,   50,  138,   59, 1283,  604, 1284,  157,  148,  800,  247,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   62,  957,  669,  151,  238, 1511,   62,  145,  151,   57,  154,\n",
-      "          515,  464,  465,  362,   57,   58,  594,  515,   68,  260,  153,  155,\n",
-      "          357,  256,  135,  362,  241,  564,  154,  262,   54,  150,   62,  523,\n",
-      "          603,  470,   17,  228,   20,  229,  811, 1512,   53,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301,  353,   92,   16,  131,   18,  132,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,  125,   92,   16,   29,   18,\n",
-      "           10,   29,   26,   27,  353,   92,   16,   20,   18,   10,  116,   16,\n",
-      "           20,   18,   16,   21,   18,  353,   92,   16,   21,   18,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1166,  441, 1167,  530,  405,  203,  705, 1168, 1169,  203, 1170, 1169,\n",
-      "         1171, 1169, 1166, 1172,  446, 1173, 1173, 1174,  553,  450,  503,   15,\n",
-      "           16,   17,   18,   10,  116,   16,  131,   91,  539,   19,  540,   93,\n",
-      "           15,   16,   17,   18,   18,   16,   91,  125,   34,  170,   93,   91,\n",
-      "          162,   34,  541,   93,   91,  125,   34,  162,   93,   91,  170,   34,\n",
-      "          541,   93,   18,  219, 1168, 1175, 1169, 1166, 1176,   71,  555,  556,\n",
-      "         1168, 1175, 1169, 1166, 1172, 1174,  440,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  230,  384,   34,  114, 1750,   10,   29,   26,   27,  114,  384,\n",
-      "           34,  230, 1750,   10,   23,  230,   91,  384,   34, 1750,   93,   10,\n",
-      "            4,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   66,  232,  233,   62,  232,   59,  234,  145,  151,   59,  235,\n",
-      "          236,  142,  237,  238,  239,  240,   10,  201,   15,   16,   82,   18,\n",
-      "          241,  242,  243,  172,  242,  244,   61,  237,   10,  228,   16,   17,\n",
-      "           18,  232,  245,   53,  228,   16,   20,   18,  117,  229,  246,  142,\n",
-      "           19,  151,  247,    3,    3,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,  273,  178,   11,   12,  160,  161,\n",
-      "           16,  277,   18,   13,   10,   20,  114,  288,  164,   79,   10,  230,\n",
-      "          288,  166,  161,   24,  167,  288,  273,  107,  277,  273,  178,   11,\n",
-      "           12,  160,  161,   16,  277,   18,   13,   10,  125,   34,   21,  279,\n",
-      "          164,   79,   10,   29,   19,  279,  166,  161,   24,  167,  279,  273,\n",
-      "          125,   10,   19,   29,  229,   65,  277,  267,  140,   65,   68,  277,\n",
-      "          358,  168,  228,   16, 1048,   18,  229,  125,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  177,  278,  107,  277,  255,   65,  137,  116,   16,   13,   15,\n",
-      "           16,   17,   18,   18,   16,   21,   18,   34,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,   20,   18,   10,   29,  361,    9,   26,\n",
-      "           27,   28,  362, 1089,  153,  466,  464,   91,   29,   26,  171,   93,\n",
-      "           91,  171,  257,   23,   93,  241,  278,   22,   19,  116,   16,   29,\n",
-      "           18,   16,   17,   18,   61,  135,   65,  259,  139,  142,   65,  238,\n",
-      "          261,   16,   83,   16, 1390,   18,   18,   34,  261,   16,   83,   16,\n",
-      "         1391,   18,   18,   34,  261,   16,   83,   16,  563,   18,   18,   10,\n",
-      "          261,   16,   23,   18,  167,   27,  241,  137,   27,   36,  261,   16,\n",
-      "           83,   16, 1391,   18,   18,   36,   26,   36,  261,   16,   83,   16,\n",
-      "         1390,   18,   18,   36,   26,   36,  261,    0],\n",
-      "        [ 231,  812,   63, 1559,  155,  813,  515,   68,   62,   68,  256,  135,\n",
-      "          594,  269,  603, 1560,  564,  361,  813,  853,  952,  363, 1561,  564,\n",
-      "         1562,  363,   66,  851,  564, 1087,  241,  155,  172, 1563,   15,   16,\n",
-      "          522,   18,  153,   10,   30,   26,   27,  155,   10,  105,   26,   27,\n",
-      "          603,   10,  116,   16,   30,   18,   16,   21,   18,   26,   27,  516,\n",
-      "           15,   16,  522,   18,   10,   17,  228,   16,   17,   18,   26,   27,\n",
-      "         1564,   66,   15,   16,  522,   18,   19, 1565,  247,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  116,   16,  248,   15,   16,   13,\n",
-      "           18,   19,  248,   15,   16,   19,   13,   18,   18,   16,   13,   15,\n",
-      "           16,   17,   18,   18,  797,   91,   27,   93,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   11,   12,  125,   92,   16,  131,   18,   24,   25, 1223, 1165,\n",
-      "         1186,  132,  125,   92,   16,   29,   18,   10,   17,   26,  125,   92,\n",
-      "           16,   20,   18,   10,   17,  125,   92,   16,   17,   18,   34,  182,\n",
-      "          229,   11,   12,  125,   92,   16,  131,   18,   24,   25,  526,  527,\n",
-      "           61,  170,   92,   16,  131,   18,   10,  126,   92,   16,   17,   18,\n",
-      "          125,   92,   16,  131,   18,  229,  180,   11,   12,  170,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  353,   92,   16,  131,   18,  132,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,  125,   92,   16,   30,   18,\n",
-      "           19,  125,   92,   16,   20,   18,   10,  298,   26,   27,  125,   92,\n",
-      "           16,  105,   18,   19,  125,   92,   16,   21,   18,   10,  354,   26,\n",
-      "          116,   16,  353,   92,   16,  131,   18,   18,   16,  125,   92,   16,\n",
-      "          131,   18,   18,   10,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 125,  170,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   36,   13,   34,   29,   36,\n",
-      "           19,   36,   13,   19,   17,   36,  229,  290,  113,   91,   13,   93,\n",
-      "          589,   29,  293,  290,  113,   91,   13,   93,  589,   13,   15,   17,\n",
-      "           19,   13,   34,  171,  293, 1319,  229,  171,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,   92,   16,   29,   18,  137,  116,   16,   13,   15,\n",
-      "           16,   17,   18,   18,   16,  125,   15,   16,   17,   18,   18,   34,\n",
-      "          116,   16,   79,   15,   16,   17,   18,   18,   16,  170,   15,   16,\n",
-      "           17,   18,   18,   10,   29,   91,  125,  257,  170,  257,   23,   93,\n",
-      "          259,  139,  135,  454,   65,   92,   16,   17,   18,  139,  455,   26,\n",
-      "           27,   65,   92,   16,   29,   18,   64,   65,  233,  455,  135,   13,\n",
-      "          456,  352,  107,  361,   65,   92,   16,   29,   18,    9,   26,   28,\n",
-      "          362,  361,   65,   92,   16,   17,   18,   65,   66,  362,   36,  269,\n",
-      "           36,   10,  116,   16,   21,   18,   16,   20,   18,   36,  153,   36,\n",
-      "          229,   65,   92,   16,   29,   18,  457,   65,   92,   16,   29,   18,\n",
-      "           99,  233,   65,   92,   16,   17,   18,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 824, 1495,  190, 1496,    9,   28,  220,  397,  530,  405,   85, 1495,\n",
-      "         1495,  190, 1496, 1497,    9,  397, 2044, 2045, 2046, 2047, 2048, 2049,\n",
-      "         1715, 2050,  505, 2051, 2052, 2053, 2048, 2054, 2055, 2052, 2056, 2057,\n",
-      "         2051, 2058,   28,  397, 2045, 2059, 2044, 2060, 1282, 1154,  505, 2045,\n",
-      "         2050, 2057, 2061, 1697, 2062, 2046, 1715, 2063, 2064, 2051, 2062, 2065,\n",
-      "         1369,   90,  220,  397, 1495, 1496, 1497, 1376, 1377, 1376, 1377,  220,\n",
-      "          397, 1496, 1497, 1459, 1499,  975,  423,  794,  610,  446, 1062,  838,\n",
-      "         1495, 1496, 1497, 1495, 1496, 1500,   58,  193,  149,  194,  301, 1455,\n",
-      "           65,    9,  397, 1495, 1496,  194, 1557,   28,  397, 1495, 1496,  194,\n",
-      "          944,  220,  397, 1495, 1174,  880, 1734,   90, 1455, 1796,  942, 1455,\n",
-      "         1796,   71,  229,   65,   71,    0,    0,    0],\n",
-      "        [  61,   35,   13,  836,   13,   79,  861,   36,   13,   34,   79,   92,\n",
-      "           35,   36,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   10,   91,   19,   29,   26,   17,\n",
-      "           93,   26,  889,   16,  170,   18,   10,   91,  171,   26,   29,   93,\n",
-      "          169,  889,   16,  125,   18,   34,  889,   16,  170,   18,  352,  171,\n",
-      "           10,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   19,   13,   15,   16,   17,\n",
-      "           18,   34,  641,   34,   21,   26,   27,  477,   91,   13,   93,   10,\n",
-      "           36,   13,   34,   29,   36,   34,   36,   13,   19,   29,   36,  125,\n",
-      "           10,   29,  249,  229,  290,  113,   91,   13,   93,  589,  477,   91,\n",
-      "           13,   93,  293,  290,  113,   91,   13,   93,  589,  477,   91,   13,\n",
-      "           93,  293, 1049,  118,  822,   29,  584,   29,  119,  229,  125,  254,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  125,\n",
-      "           92,   16,   29,   18,   10,  116,   16,   29,   18,   16,   21,   18,\n",
-      "           26,   27,  125,   92,   16,   20,   18,  125,   92,   16,   30,   18,\n",
-      "           10,   21,   27,   11,   91,  125,   92,   16,   21,   18,   19,   29,\n",
-      "           24,   93,   26,   27,  125,   92,   16,   17,   18,   10,   91,   93,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  230,   15,   16,   17,   18,\n",
-      "           13,  230,   17,   13,  250,  113,   91,   13,   93,   91,   23,   26,\n",
-      "          117,   93,  251,  252,  241,   36,  113,   91,   13,   93,   36,  163,\n",
-      "          116,   16,   20,  228,   16,   20,   18,   18,   16,  134,   18,  241,\n",
-      "          230,   15,   16,   17,   18,   13,  230,   15,   16,   17,   18,   17,\n",
-      "           13,  230,   15,   16,   17,   18,   21,   13,  721,  230,   15,   16,\n",
-      "           17,   18,   17,   15,   16,  131,   18,   13,  163,  116,   16,   20,\n",
-      "           15,   16,  131,   18,   18,   16,   21,   15,   16,  131,   18,   18,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  125,   15,   16,   17,   18,   18,   34,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,\n",
-      "           29,   27,   91,  125,  257,  170,  257,   23,   93,   26,   27, 1877,\n",
-      "           16,  960, 1878,   18,  142,   92,   16,   29,   18,   91,   29,   26,\n",
-      "           29,   93,   26,  142,   92,   16,   17,   18,   91,   23,   26,   29,\n",
-      "           93,  142,   92,   16,   20,   18,   11,   91,   19,   29,   26,  116,\n",
-      "           16,  228,   16,   20,   18,   18,   16,   17,   18,   24,   93,   26,\n",
-      "           27,  142,   92,   16,   21,   18,   11,   91,   29,   26,  116,   16,\n",
-      "          228,   16,   20,   18,   18,   16,   17,   18,   24,   93, 1879,  379,\n",
-      "          255,   65, 1508,   65,  178,   61,  107,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   36,   13,   34,   29,   36,\n",
-      "           19,   36,   17,   13,   19,   20,   36,  121,  964,  794,   79,  113,\n",
-      "           13,  797,  229,  290,   36,  113,   13,   36,  293,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  372,  373,  726, 1420,  131,  294,  465,  584,  131,   15,   17,\n",
-      "         1724,   17,   15,  131,  392,  373,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  641,   15,   16,   20,   18,\n",
-      "           34,   13,   34,   29,  797,   68,  113,  579,  176,  106,  125,  179,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,  273,  178,   11,   12,  160,  161,\n",
-      "           16,  277,   18,   13,   10,   17,   19,  279,   19,  279,   15,   16,\n",
-      "           17,   18,  164,   79,   10,   17,   19,   20,  279,   34,  279,   15,\n",
-      "           16,   17,   18,  166,  161,   24,  167,  279,  273,  279,  572,   29,\n",
-      "           65,  356,  361,    9,   26,   28,  362,  229,   36,  153,   36,  140,\n",
-      "          141,  280,   13,  281,  282,  283,  284,  285,  272,  229,  107,  153,\n",
-      "          286,  178,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 882,  242,  801,  802,  631,  520,  231,  801,  247,  631,  247,   60,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,    8,  353,   10,   12,   13,   36,   91,   13,   19,   17,   93,\n",
-      "           91,   13,   19,   20,   93,  589,   23,   25,  499,   10,   12,   13,\n",
-      "           36,   13,  257,   23,   25,   83,   16,  353,   18,   31,   83,   16,\n",
-      "          499,   18,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 114,   11,   91,  116,   16,  117,   18,   16,   21,   18,   19,  384,\n",
-      "           24,   93,   10,  116,   16,   20,   18,   16,   30,   18,  230,   17,\n",
-      "          384,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   26,   79,  159,   11,   12,  160,  161,   16,  162,   18,   17,\n",
-      "           13,   34,   79,   19,   17,  163,   23,  164,   13,   19,   79,   19,\n",
-      "           29,  165,   23,  164,   79,   34,   29,  165,   23,  166,  161,   24,\n",
-      "          167,   33,   10,   13,   34,  133,   79,  168,    4,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  169,  889,   16,  125,   18,   10,   91,  171,   26,   29,   93,\n",
-      "           26,  889,   16,  170,   18,   10,   91,   29,   26,   17,   93,   26,\n",
-      "           27, 1097,   36,  889,   16,  125,   18,   34,  889,   16,  170,   18,\n",
-      "           36,   15,   16,   17,   18,   10,   36,  889,   16,  125,   18,   36,\n",
-      "           15,   16,   17,   18,   34,   36,  889,   16,  170,   18,   36,   15,\n",
-      "           16,   17,   18,   26,  171,   10,    4,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,   83,   16,  151,   18,  102,  594,  154, 1067, 1068,  256,  594,\n",
-      "          466,  261,   16,   83,   16,  472,   18,   18,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 546,  530,  414, 2079,  307,   13,   92,   16,   29,   18,   26,   13,\n",
-      "           92,   16,   17,   18,   26,  721,   26,   13,   92,   16,  131,   18,\n",
-      "           26,   79,   92,   16,   29,   18,   26,   79,   92,   16,   17,   18,\n",
-      "           26,  721,   26,   79,   92,   16,  131,   18,  131,  307,   11,   91,\n",
-      "           13,   92,   16,   29,   18,   26,   79,   92,   16,   29,   18,   24,\n",
-      "           93,   26,   27,   11,   91,   13,   92,   16,   17,   18,   26,   79,\n",
-      "           92,   16,   17,   18,   24,   93,   26,  721,   26,   11,   91,   13,\n",
-      "           92,   16,  131,   18,   26,   79,   92,   16,  131,   18,   24,   93,\n",
-      "         2080, 2081,  346,  433,  682,  171,  530, 2082,  413,  792,  117, 2083,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   62,   52,   63,   64,   62,   26,    9,   26,   28,   26,   65,\n",
-      "           26,   66,   67,   68,   69,   68,   70,   71,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 125,  861,   91,   17,   34, 1471,   93,   91,  125,   19,   17,   35,\n",
-      "           93,   10,   19,   21,   35,  125,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  145,  151,   51,   56,  142,  242,  151,  238,  261,   16,   83,\n",
-      "           16,  266,   18,   18,  263,   91,  261,   16,   83,   16,  268,   18,\n",
-      "           18,   34,  261,   16,   83,   16,  608,   18,   18,   93,  111,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  135,  136,   65,  137,   13,   15,   16,   17,   18,   19,  116,\n",
-      "           16,   79,   15,   16,   17,   18,   18,   16,   20,   18,   10,   29,\n",
-      "          259,  139,  142,   65,  238,  146,   13,  456,  352,   68,    9,  140,\n",
-      "          990,   29,  584,   20,  991,  145,   83,   16,  809,   18,   53,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 129, 1478, 1479, 1480,  764,   40,  766,  767,  763,  102, 1481, 1482,\n",
-      "         1483,  127,  129,  355,  125,  170,  759, 1484,  130,  125,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   26,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,\n",
-      "           34,   79,  165,   19,   29,  164,   13,   19,   79,  165,   19,   29,\n",
-      "          164,   17,   13,   19,   79,  163,   29,  166,  161,   24,  167,   33,\n",
-      "           10,   13,   34,   17,   79,  168,    4,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1398, 1399, 1400, 1401,  980, 1402, 1403,  662,  980, 1404, 1405, 1406,\n",
-      "         1407,  528, 1408, 1405, 1059,  530,  405,  216,  528, 1408, 1398, 1401,\n",
-      "          528,  682,  201, 1409, 1408, 1401,  528,  682,  426, 1409, 1408, 1398,\n",
-      "         1408, 1401,  528,  682,  351, 1409, 1410, 1408, 1398,  528, 1275, 1410,\n",
-      "          528, 1411,   60,  430,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,   19,\n",
-      "           79,   34,   29,  165,   23,  164,   13,   34,   79,   19,   20,  165,\n",
-      "           23,  164,   13,   19,   20,  163,   23,  166,  161,   24,  167,   33,\n",
-      "           10,   13,   19,   17,   79,  111,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  135,  513,   83,   16,   65,   18,  137,   83,   16,   79,   18,\n",
-      "           15,   16,   17,   18,   10,  134,   83,   16,   13,   18,  139,  464,\n",
-      "           65,  238, 1882, 2066,  361,   79,  949,   68,  465,  464, 1883,  466,\n",
-      "           36, 1883,   36,  179,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  102,  116,   16,  117,   18,   16,   17,   18,  123,  546,   91,\n",
-      "          116,   16,  117,   18,   16,   21,   18,   26,  116,   16,  117,   18,\n",
-      "           16,   17,   18,   93,  251,  888,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  125,\n",
-      "           92,   16,   29,   18,   34,  125,   92,   16,   17,   18,   10,   21,\n",
-      "           26,  125,   92,   16,   20,   18,   19,  125,   92,   16,   29,   18,\n",
-      "           10,  134,  229,   11,   12,  125,   92,   16,  131,   18,   24,   25,\n",
-      "          526,  527,  301,  353,   92,   16,  131,   18,  180,   11,   12,  126,\n",
-      "           92,   16,   20,   18,  125,   92,   16,  131,   18,   24,   25,  181,\n",
-      "           83,   16,  131,   18,  183,  353,   92,   16,  171,   18,   34,  353,\n",
-      "           92,   16,  171,   34,   29,   18,   10,  353,   92,   16,  171,   34,\n",
-      "           20,   18,   26,  229,  171,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   33,   10,   91,  171,   34,   20,   93,   34,   91,  171,   19,\n",
-      "           29,   93,   35, 1273,  242,   68,  645,  646,  861,  171,  254,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 113,   91,   13,   93,   10,   11,   36,   13,   19,  125,   15,   16,\n",
-      "           17,   18,   24,   36,   34,   36,   13,   34,   17,  125,   19,   29,\n",
-      "           36,  125,   10,   17,  249,  229,  290,  113,   91,   13,   93,  165,\n",
-      "           21,  293,  113,   91,   13,   93,  165,   21,   26,  229,  125,  254,\n",
-      "          481,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  180,   12,  125,   92,  131,   25,  125,   92,   16,   29,   18,\n",
-      "           10,   29,   26,   27,   83,   16,  602,   18,   92,   16,  131,   34,\n",
-      "           29,   18,   10,   17,   27,   91,   83,   16,  131,   18,   34,   29,\n",
-      "           93,   27,  125,   92,   16,  131,   18,   26,   27,   61,   83,   16,\n",
-      "          170,   18,   92,   16,  131,   18,   10,  116,   16,   83,   16,  125,\n",
-      "           18,   92,   16,   83,   16,  131,   18,   18,   18,   16,   83,   16,\n",
-      "          131,   18,   18,  229,  170,   92,   16,   29,   18,   26,   27,   83,\n",
-      "           16,  170,   18,   92,   16,   17,   18,   26,   27,   83,   16,  170,\n",
-      "           18,   92,   16,   20,   18,  554,  180,   12,  170,   92,  131,   25,\n",
-      "          132,  449,  229,   12,  125,   92,   16,  131,   18,   25,  526,  527,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   36,   20,   13,   34,   29,\n",
-      "           36,   19,   17,   36,   13,   19,   29,   36,  292,   79,   10,  113,\n",
-      "           91,   13,   93,  120,  229,  290,  113,   91,   13,   93,  257,  113,\n",
-      "           91,   13,   34,   29,   93,  293,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  91,   17,   13,   34,  228,   16,   13,   18,   93,   15,   16,   30,\n",
-      "           18,  582,  102,   83,   16,   13,   18,   15,   16,   20,   18,  583,\n",
-      "            4,  733, 1613, 1784,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  32,   33,   10,   29,   34,   17,   35,   34,   35,   15,   16,   20,\n",
-      "           18,   36,   33,   36,   10,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  226,    9,  584,   28,  584,   65,  125,  584,  170,  584,\n",
-      "          162,    7,  125,  230,    9,   19,  170,  230,   28,   10,   21,  162,\n",
-      "          230,   65,   26,   27,  114,    9,   10,   19,  116,   16,   29,   18,\n",
-      "           16,   21,   18,  116,   16,  170,   18,   16,  162,   18,   10,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,  397, 1630,  829, 1253,  829, 1631, 1632, 1633,   79,   81, 1634,\n",
-      "         1230, 1252,  397, 1635,  829, 1631, 1632, 1633,  284,   79, 1375, 1358,\n",
-      "          279,  138, 1249, 1250,  489, 1630,  829, 1253,  829,   90, 1375, 1358,\n",
-      "          279,  610,  300,  837, 1048,  284,  489, 1245,   16,   79,   18,   10,\n",
-      "           19, 1637,   34, 1638,   83,   16,  279,   18, 1639,  829, 1253,  829,\n",
-      "           90, 1375, 1358,  279,  610,  300,  837,  284,  489, 1245,   16,   79,\n",
-      "           18,   10, 1622,   34, 1640,  279, 1429,  138,  489,  429,  397, 1635,\n",
-      "          829, 1631, 1632, 1633, 1641,  489, 1641,  443, 1642,  449,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  231,  129,  130,  353,  610,  346, 1282,  355,  697,  465,  111,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  513,   65,   79,   15,   16,   17,   18,   10,   21,   13,  139,\n",
-      "          135,  106,  822,  177,  116,   16,   17,   18,   16,   20,   18,  107,\n",
-      "           65,  515,  464,  465,  362,  261,   16,   83,   16, 1882,   18,   18,\n",
-      "          263,  261,   16,   83,   16, 1883,   18,   18,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1725, 1726,  102, 1727, 1728, 1729,  348, 1730, 1729, 1726,    7,  612,\n",
-      "         1731, 1725, 1730,   71, 1732, 1733, 1725, 1730,  880, 1734,  612, 1726,\n",
-      "           71,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 980,   40,  423, 1529,  610, 1530, 1478,  231, 1478,  129,  127,  129,\n",
-      "          355,   13,  131,  300,  355,  125,  130, 1021,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  135,  513,   65,   79,   15,   16,   17,   18,   10,   21,   13,\n",
-      "          139,  173,   79,   10,  116,   16,  278,   18,   16,   13,   18,   91,\n",
-      "          278,  257,   23,   93,   65,  515,   68,  142,  146,  172,  296,   16,\n",
-      "           13,   18,  456,  278,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 370,   11,   12,  125,   92,   16,  131,   18,   24,   25,  102,   26,\n",
-      "           27,  125,   92,   16,   20,   18,   34,  125,   92,   16,   21,   18,\n",
-      "           10,   21,   26,   27,  125,   92,   16,   30,   18,   34,  125,   92,\n",
-      "           16,  133,   18,   10,  105,  229,   11,   12,  125,   92,   16,  131,\n",
-      "           18,   24,   25, 1545,  527,   61,  170,   92,   16,  131,   18,   10,\n",
-      "           11,  118,  125,   92,   16,  131,   18,   24,  119,  229,  180,   11,\n",
-      "           12,  170,   92,   16,  131,   18,   24,   25,  181,   96,  183,   13,\n",
-      "          339,   13, 1546, 1436,   10,   23,   26,   27,  118, 1547,  119,   10,\n",
-      "           17,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    9,   28,   65,   66, 1284,  523,  157,  148,  960,  145,   83,\n",
-      "           16,  151,   18,   56,   53,  366,  228,   16,   20,   18,   26,  246,\n",
-      "           66,  151,  247,  168,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231, 1213, 1214,   52,   51, 1215, 1216,  292,  519,  520,  519,  242,\n",
-      "          800,  801,  802,  877,  519,  247,   91,   27,   93,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 763,  764,   40,  765,  766,  767,  768,  769,  770,  771,  226,  772,\n",
-      "          773,   58,  774,  775,  776,  777,  778,  779,  780,  781,  777,  231,\n",
-      "          777,  782,  232,  783,  777,  782,  784,  785,  786,  777,  782,   50,\n",
-      "          786,  787,  782,  247,  781,  777,  788,    7,  789,  777,  247,  510,\n",
-      "          790,  791,  786,  792,  510,  793,  794,  781,  777,  510,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 371,   99,  372,  373,   92,   16,   29,   18,  137,  220,  220,  374,\n",
-      "          238,  375,  107,  376,  242,  373,   92,   16,   17,   18,  137,  377,\n",
-      "          102,  378,  379,  380,  381,  242,  373,   92,   16,   20,   18,  137,\n",
-      "          377,  359,  107,  374,  359,  107,  382,  373,   92,   16,   21,   18,\n",
-      "          137,  107,  277,  383,  242,  384,   26,  107,  171,  172,  242,  384,\n",
-      "           26,  171,  172,  277,  385,  372,  102,  386,  372,  387,    4,  388,\n",
-      "          373,   92,   16,   29,   18,  389,  373,   92,   16,   21,   18,  390,\n",
-      "          373,   92,   16,   29,   18,  389,  373,   92,   16,   17,   18,  391,\n",
-      "          392,  373,   92,   16,   17,   18,  393,  373,   92,   16,   20,   18,\n",
-      "          394,  392,  373,   92,   16,   20,   18,  393,  392,  373,   92,   16,\n",
-      "           21,   18,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   11,   36,   13,   19,  116,\n",
-      "           16,   29,   18,   16,   17,   18,   24,   36,   34,   11,   36,   13,\n",
-      "           34,  116,   16,   29,   18,   16,   17,   18,   24,   36,  464,  290,\n",
-      "          113,   91,   13,   93, 1574,   17,  293,  229,  464,  241,  125,   26,\n",
-      "          170,  294,  464,  249,   36,  125,   34,  170,   36, 1574,   36,   29,\n",
-      "           34,  575,   36,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231, 1080, 1081,  102,  153,   10,  155,   10,   20,  239,   83,   16,\n",
-      "         1082,   18,   10,  201,   15,   16,   82,   18,  155, 1083,  145,   83,\n",
-      "           16, 1082,   18, 1084, 1085,  464, 1086,   68,   66, 1087,   83,   16,\n",
-      "          153,   18,  172,   83,   16, 1088,   18,  241,  242,  823,  172,  242,\n",
-      "          151,  568, 1089,  594,  238,  142, 1089,  154,  238,   83,   16,  569,\n",
-      "           18,   10,   83,   16, 1090,   18,   10,  116,   16,   17,   18,   16,\n",
-      "           20,   18,   83,   16, 1088,   18,  229,  246,  568,  822, 1091,  247,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  230,   13,   34,  116,   16,   29,\n",
-      "           18,   16,  230,   13,   18,   99,  372,  113,   91,   13,   93,  120,\n",
-      "           79,  735,  113,   91,   13,   93,  120,  141,  736,  113,   91,   13,\n",
-      "           93,  120,  107,   13,   10,  116,   16,  117,   18,   16,   17,   18,\n",
-      "          736,  113,   91,   13,   93,  111,  386,  372,  387,  737,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 581,   11,   91,   13,   34,  116,   16,   79,   15,   16,   17,   18,\n",
-      "           18,   16,   13,   18,   24,   93,   91,   13,   34,   79,   93,   15,\n",
-      "           16,   30,   18,  582,  102,   13,   15,   16,   20,   18,   79,   15,\n",
-      "           16,   20,   18,  583,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1548, 1549,  125,   81,  202,  918, 1548, 1550,  662, 1551, 1551, 1552,\n",
-      "         1549,  825, 1553, 1554, 1555,  530,  405, 1548,  409,  705, 1551, 1050,\n",
-      "         1553, 1059, 1556,  301,    9, 1455, 1551, 1552, 1549, 1557, 1549,  229,\n",
-      "          142,    9,  430,  301,   28, 1455, 1551, 1552, 1549, 1557, 1549, 1557,\n",
-      "         1549, 1558,  229,  142,   28,  430,  229, 1551, 1552,  544, 1549,  430,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  290, 1418,   11,   12,  160,  161,   16,  277,   18,   13,   34,\n",
-      "           79,  167,  167,  105,  164,   17,   13,   19,   79,  165,   23,  166,\n",
-      "          161,   24,  167,  242, 1419,   66,  372,  373,  137, 1420,   91,   13,\n",
-      "           26,   79,   93,  294,   66,   26,   17,   13,   34,   79,  167,  167,\n",
-      "          366,  372, 1421,   91,   13,   26,   79,   93,  294,   66,   26,   17,\n",
-      "           13,   34,   79,   26,  298,  446,   99,  372,  373,  393, 1422,  392,\n",
-      "          373,  393, 1422,  373,  389,  392, 1422,  392,  373,  389,  392, 1422,\n",
-      "           99,  372,  102,  386,  372, 1148,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   91,   13,   19,   17,   93,\n",
-      "          248,   15,   16,   13,   34,  125,   18,   91,   13,   19,   29,   93,\n",
-      "           15,   16,   17,   18,  138,  253,  229,  125,  254,   61,   83,   16,\n",
-      "           13,   18,   92,   16,   29,   18,   26,   27,   83,   16,   13,   18,\n",
-      "           92,   16,   17,   18,   83,   16,  113,   18,   91,   83,   16,   13,\n",
-      "           18,   93,  138,  253,  241,   83,   16,   13,   18,   92,   16,   29,\n",
-      "           18,   34,   83,   16,   13,   18,   92,   16,   17,   18,   22,   17,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1114,  969, 1115, 1116,   96,  417,  445, 1117, 1118, 1119, 1120,  869,\n",
-      "         1121,  734, 1122, 1122,  670, 1121, 1123,  271,  272,  273,  178,  274,\n",
-      "          275,  276,  102,  173,   83,   16,   65,   18,   92,   16,   29,   18,\n",
-      "          178,   79,   10,  278,   36,   13,   36,   34,   17,  140,  141,  280,\n",
-      "           13,  281,  282,  283,  284,  285,  272,  173,   83,   16,   65,   18,\n",
-      "           92,   16,   17,   18,  286,  178,  287,   15,   16,   17,   18,   34,\n",
-      "           17,  287,  114,  288,   19,   20,   10,   23,  229,   83,   16,   65,\n",
-      "           18,   92,   16,   17,   18,  274,  178,   83,   16,   65,   18,   92,\n",
-      "           16,   29,   18,   83,   16,   65,   18,   92,   16,   17,   18,  380,\n",
-      "          381,  149,  289,   68,  229,   83,   16,   65,   18,   92,   16,   29,\n",
-      "           18,  178,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  102,  125,\n",
-      "           92,   16,   29,   18,   10,   29,   26,   27,  125,   92,   16,   30,\n",
-      "           18,   10,   21,  125,   92,   16,   20,   18,  229,   11,   12,  125,\n",
-      "           92,   16,  131,   18,   24,   25,  526,  527,  301,   83,   16,  353,\n",
-      "           18,   92,   16,  131,   18,   11,   12,  125,   92,   16,  131,   18,\n",
-      "           24,   25,  181,  131,  183,  353,   92,   16,  171,   18, 1360,  229,\n",
-      "          171,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 824, 1765, 1766, 1766,  596, 1767, 1768,  203,  596,   98, 1086, 1769,\n",
-      "         1770, 1771, 1765, 1086, 1769, 1770, 1772,  530, 1773, 1375,  339,   96,\n",
-      "         1774,   71,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   62,  957,  669,  151,  238,  150,   62,  145,   83,   16,  151,\n",
-      "           18,   57,  154,  361,  464,  465,  362,   57,   58,  594,  515,   68,\n",
-      "          260,  153,  155,  357,  256,  135,  362,  241,  564,  717,  154,  262,\n",
-      "           54,  150,   62,  523,  603,   10,  470,   10,   17,  228,   16,   20,\n",
-      "           18,  229,  811, 1512,   53,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   16,   13,   79,   36, 1760, 2129,  859,   13,  758,\n",
-      "          295,   79,  758,  295,    9,  102,  484,  307,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  230,  384,   19,  114,  384,   10,  116,   16,   21,   18,   16,\n",
-      "           20,   18,   26,   27,  230,   17,  384,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  135,   92,   16,   29,   18,   26,  135,   92,   16,   17,   18,\n",
-      "          136,   65,  137,   13,   15,   16,   17,   18,   19,  116,   16,   79,\n",
-      "           15,   16,   17,   18,   18,   16,   20,   18,   10,   29,  138,  139,\n",
-      "           62,  140,  141,   68,  142,   65,  143,   36,  144,   36,   10,   17,\n",
-      "          145,  146,   92,   16,   29,   18,  135,   92,   16,   17,   18,   53,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 285,  272,  102,   62,  280,   68,  464,   11,   91,  287,   92,   16,\n",
-      "           23,   18,   26,  288,   92,   16,   23,   18,   24,   93,   11,   91,\n",
-      "          287,   92,   16,   23,   18,  257,   23,   24,   93,  173,   65,  137,\n",
-      "          287,   10,   21,  230,  288,  107,  277,  106,    9,   91,   21,   26,\n",
-      "           23,   93,  848,  352, 1571,  142,  288,   92,   16,   23,   18,   10,\n",
-      "          116,   16,  117,   18,   16,   20,   18,  249,  229,  287,   92,   16,\n",
-      "           23,   18,  277,  286,  178,  464,   65, 1182,  142, 1089,  848, 1721,\n",
-      "          229,  142,   68,  512,  286,  178,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  180,   11,   12,  125,   92,   16,  131,   18,   24,   25,  181,\n",
-      "          131,  183,  353,   92,   16,  131,   18,  125,   92,   16,   29,   18,\n",
-      "           10,   19,   29,  125,   92,   16,  131,   34,   29,   18,   10,  353,\n",
-      "           92,   16,  131,   34,   29,   18,  353,   92,   16,  131,   18,  353,\n",
-      "           92,   16,  131,   18,   10,  179,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   33,   10,   19,   20,   34,   17,   35, 1273,  242,  425,   16,\n",
-      "           33,   18,   68, 1274,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 528, 1361, 1427, 1428, 1429,   20,   66, 1430,  696, 1431,  489,  231,\n",
-      "          489,  750,   63,   19,    9,   92,   16,   29,   18,  154,   92,   16,\n",
-      "           29,   18,   66,   92,   16,   29,   18, 1432,   49,   47,   62,   19,\n",
-      "         1433,  877,  519,   62,  750,   64,  256,   26,  135,   26,  260,   26,\n",
-      "          952,  558,  466,  153,   10,  154,   10,  105,   83,   16, 1019,   18,\n",
-      "           26,  468,   92,   16,   29,   18,   10,   21,   83,   16, 1019,   18,\n",
-      "           20,   66, 1430, 1434,  205, 1435, 1436,  477,  469, 1019,   15,   16,\n",
-      "           20,   18, 1430, 1437, 1431,  489,  828,  205, 1438,    4,  477,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 242,  811,   63,  102,  239,   83,   16, 1903,   18,   10,  201,   15,\n",
-      "           16,   82,   18,  239,    9,   10,  703,   15,   16,   82,   18,  153,\n",
-      "          813,  229,  114,  239,   83,   16, 1904,   18, 1009,   17,  228,   16,\n",
-      "           17,   18,  229,  154,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 764, 1668, 1669,  696, 1670,  217, 1671, 1672, 1668, 1673,  102,   96,\n",
-      "         1674, 1675, 1676,   85, 1674, 1675, 1677,   96, 1674, 1675, 1678, 1671,\n",
-      "         1679, 1668, 1673, 1674,  544, 1675,  430,  179,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  811,   63,  812,  239,  151,   10,  819,   15,   16,   82,   18,\n",
-      "          256,  135,  242,   63, 1743,  362,  814, 1744,  242,   63, 1570, 1744,\n",
-      "          242,   63,  814,   10,   17, 1570,  603, 1744,  821,  241,  242,  816,\n",
-      "         1744,  242, 1745,  229,  107,  603,  107, 1560,  719,  609,  610,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,  113,   91,   13,   93,   10,   17,  114,   13,   34,  230,   13,\n",
-      "          168,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   32,   33,   36,   33,   19,   35,   36,   10,   29,   33, 1273,\n",
-      "          242,   68,   13,   79,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   91,   13,  294,  573,   93,  113,\n",
-      "           91,   13,   93,   10,  113,   91,   17,   19,   13,   93,  112,   79,\n",
-      "           10,   11,   36,   13,   15,   16,   17,   18,   19,   17,   13,   19,\n",
-      "           20,   24,   36,   79,   10,  113,   91,   13,   93,  797,  267,   11,\n",
-      "           91,  160,  161,   16, 1079,   18,   13,   92,   16,   29,   18,   26,\n",
-      "          744,   79,   92,   16,   29,   18,  166,  161,   24,   93,   26,   27,\n",
-      "           11,   91,  160,  161,   16, 1079,   18,   13,   92,   16,   17,   18,\n",
-      "           26,  744,   79,   92,   16,   17,   18,  166,  161,   24,   93,   26,\n",
-      "          721,   26,   11,   91,   13,   92,   16,  171,   18,   26,   79,   92,\n",
-      "           16,  171,   18,   24,   93,  424,   92,   16,   35,   10,   29,   18,\n",
-      "           15,   16,  117,   18,   13,   92,   16,    0],\n",
-      "        [   7,    8,    9,   10,   12,   13,   36,   19,   29,   22,   13,   22,\n",
-      "           17,   25,   26,   27,   28,   10,   12,   13,   36,   23,   22,   13,\n",
-      "           22,   20,   25,   26,    9,  644,   28,   10,   91,   27,   93,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  112,  113,   91,   13,   93,   10,  114,   11,   91,  115,   13,\n",
-      "           34,  116,   16,  117,   18,   16,  105,   18,   24,   93,  118,   19,\n",
-      "          117,   26,  117,  119,  120,  121,  113,   91,   13,   93,  122,  580,\n",
-      "          123,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7, 1841,  173,   65,  137,  116,   16,   13,   15,   16,   17,   18,\n",
-      "           18,   16,  125,   15,   16,   17,   18,   18,   19,  116,   16,   79,\n",
-      "           15,   16,   17,   18,   18,   16,  170,   15,   16,   17,   18,   18,\n",
-      "           10,   29,   27,   91,  125,  257,   23,   26,   27,  170,  257,   23,\n",
-      "           93,  259,  233,    9,   26,   27,    9,  104, 1842,  170,  523,  959,\n",
-      "            9,  104,    9,  136,   65,  175,  360,  361,  464,  465,  362,  239,\n",
-      "           83,   16, 1843,   18,   10,  351,   15,   16,   82,   18,   83,   16,\n",
-      "           65,   18,  457,  737,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  384,  294,   91,   23,   26,  117,   93,   20,  114,  384,   19,\n",
-      "          134,  114,  384,   10,   30,   26,  230,  384,   10,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   32,   33,   33,   34,   35,   10,   20,  822,   35,  425,   16,\n",
-      "           33,   18,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 104,  255,  116,   16,   13,   15,   17,   18,   16,  182,   18,   34,\n",
-      "          116,   16,   79,   15,   17,   18,   16,   21,   18,   10,   29,  149,\n",
-      "          233,  234,   13,  456,  580,  282,  104,  192,  178, 1739,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   36,   17,   13,   19,  125,\n",
-      "           36,   34,  125,  125,  249,  229,  290,  113,   91,   13,   93,  578,\n",
-      "          105,  293,   61,  112,  477,   91,   13,   93,   10,   36,   17,   13,\n",
-      "           19,   29,   36,   13,  758,  573,  249,  113,   91,   13,   93,   34,\n",
-      "          477,   91,   13,   93,  589,   20,  229,  125,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   91,   13,   34,   29,   93,\n",
-      "          174,   13,   19,  125,   91,   13,   19,   29,   93,  125,  249,  229,\n",
-      "          173,   79,   10,  113,   91,   13,   93,   91,   29,  584,  113,   91,\n",
-      "           29,   93,   93,  579,  176,  178, 1566,   13,  294,   91,   29,   26,\n",
-      "           34,  887,   93,  249,  113,   91,   13,   93,  257,   23,  229,  125,\n",
-      "          254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   13,   26,   79,  159,   11,   12,  160,  161,   16,  277,   18,\n",
-      "           17,   13,   34,   20,   79,   19,   20,   22,   23,  164,   17,   13,\n",
-      "           19,   20,   79,   34,   20,  257,   23,  164,   79,   34,   20,  589,\n",
-      "           23,  166,  161,   24,  167,   33,   10,   17,   13,   34,   79,  111,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1412,  151,  226,    9,   28,   65,  125,  170,  162,    7, 1789, 1681,\n",
-      "         1790,  162,  229,   65,   83,   16,  162,   18,   10,  228,   16,  133,\n",
-      "           18,   26,   27,  145,   83,   16,  151,   18,   53,  116,   16,   20,\n",
-      "          228,   16,   20,   18,   18,   16,   17,   18,   26,  229,  145,   83,\n",
-      "           16,  151,   18,  713,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   11,   12,   13,   14,   13,   15,   16,   17,\n",
-      "           18,   19,   20,   13,   19,   21,   22,   23,   24,   25,   26,   27,\n",
-      "           28,   10,   12,   19,   21,   26,   29,   26,   20,   26,   30,   25,\n",
-      "           26,   27,    9,   31,   28,   10,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  513,   65,   79,   15,   16,   17,   18,   10,   17,   13,  139,\n",
-      "          135,  382,   13,  456,  359,  107,  277,   92,   16,   29,   18,  277,\n",
-      "           92,   16,   17,   18,  361,   65,    9,   28,  362,  361,   65,  458,\n",
-      "          142,  568,  362,  135, 1089,  153,  573, 1256,  466,  241, 1257, 1599,\n",
-      "         1258, 1412, 1259,   53, 1412, 1260,   53, 1261,  229,  153,  466,  512,\n",
-      "          178,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 242,  384,  882,   83,   16,   63,   18,   19,   83,   16,    9,   18,\n",
-      "           92,   16,   29,   18,   83,   16,   28,   18,   92,   16,   29,   18,\n",
-      "           83,   16,   65,   18,   92,   16,   29,   18,   83,   16,   66,   18,\n",
-      "           92,   16,   29,   18,  233,    9,  384,  469,  469,  242,   83,   16,\n",
-      "          883,   18,   92,   16,   29,   18,   83,   16,   66,   18,   92,   16,\n",
-      "           29,   18,  384,   31,  242,   63,   10,  171,  384,   31,  242,   83,\n",
-      "           16,  884,   18,   92,   16,   29,   18,   83,   16,    9,   18,   92,\n",
-      "           16,   29,   18,   10,   83,   16,  131,   18,  171,   26,  131,  719,\n",
-      "          720,  741,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 882,   63,   19,    9,   92,   29,   28,   92,   29,   65,   92,   29,\n",
-      "           66,   92,   29,  102,  256,  558,  269,  466,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1965,  406, 1966, 1967,  212,  209,  894, 1968, 1969, 1968,  443, 1970,\n",
-      "         1444, 1444, 1971, 1972, 1367, 1973, 1974, 1975, 1444, 1973, 1974,  530,\n",
-      "          969, 1976, 1977, 1978, 1979, 1977, 1980, 1972, 1965,  712, 1972, 1444,\n",
-      "          447, 1981, 1982, 1974,  447, 1981, 1982, 1974, 1983, 1984, 1444, 1982,\n",
-      "         1985, 1981,  443,  700,  195, 1986, 1444, 1977, 1978, 1974, 1982, 1977,\n",
-      "         1980, 1974, 1094, 1982, 1978,  417, 1980,  417, 1977, 1980, 1974, 1982,\n",
-      "         1977, 1978, 1974, 1094, 1982, 1980,  417, 1978,  417, 1982, 1094, 1982,\n",
-      "          894, 1987,  417,  212,  209,  894, 1981, 1988,  301, 1393, 1662, 1972,\n",
-      "         1444, 1989, 1990, 1892,  973,  229,  973, 1101, 1798, 1991, 1980, 1444,\n",
-      "          249, 1992,  417,  373,   92,   16,   35,   18,   91,   35,   10,   23,\n",
-      "           26,   29,   26,   94,   26,  134,   93,    0],\n",
-      "        [   7,   11,   12,  125,   92,   16,  131,   18,   24,   25,  795,   20,\n",
-      "          370,  180,   11,   12,  170,   92,   16,  131,   18,   24,   25,  170,\n",
-      "           92,   16,   29,   18,   10,   29,   26,   27,  170,   92,   16,   17,\n",
-      "           18,   10,  116,   16,   29,   18,   16,   20,   18,  125,   92,   16,\n",
-      "          131,   18,  170,   92,   16,  131,   34,   29,   18,   34,  170,   92,\n",
-      "           16,  131,   34,   29,   18,   10,  906,   92,   16,  131,   18,  839,\n",
-      "          229,   11,   12,  125,   92,   16,  131,   18,   24,   25,  526,  527,\n",
-      "          842,  229,   11,   12,  170,   92,   16,  131,   18,   24,   25,  181,\n",
-      "          131,  183,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 107,   13,   34,   79,   34,   17,   10,   23,   13,  456,   79, 1220,\n",
-      "            9,   28,  362,   68,  142,  104,   91,   13,   19,   17,   93,   15,\n",
-      "           16,   17,   18,   34,   79,   15,   16,   17,   18,   10,   17,  145,\n",
-      "           83,   16, 1091,   18,   53,  254,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1801,   13,   15,   79,   15, 1762,  483,  234,    9,  107,  277,  106,\n",
-      "           28,   13,  456,  455,  277, 1802,    9,   65,   66,  362,   28,  585,\n",
-      "          155, 1803,  361,  594,  853,  256,  241,   36, 1804,   36,   36,  472,\n",
-      "           36, 1185, 1269,   68,  256,  512,  178, 1270,  256,  512,  173,   65,\n",
-      "           92,   16,   29,   18,   26,  107, 1805,  361,   65,   92,   16,   29,\n",
-      "           18,  464,  465,  362,   28,  502,  352,  107,  104,    9,  361,  142,\n",
-      "          568,  362,  229,  811, 1806,   53,  254,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  290,  291,   61,   13,   26,   79,   26,   33,  294,  573,   13,\n",
-      "           34,   79,   34,   33,   10,   29,  229,   91,   13,   19,   29,   93,\n",
-      "           15,   16,   17,   18,   34,   91,   79,   34,   29,   93,   15,   16,\n",
-      "           17,   18,   34,   91,   33,   34,   29,   93,   15,   16,   17,   18,\n",
-      "          111,   91,   13,   19,   17,   93,   15,   16,   17,   18,   34,   91,\n",
-      "           79,   19,   29,   93,   15,   16,   17,   18,   34,   91,   33,   19,\n",
-      "          125,   93,   15,   16,   17,   18,  165,  116,   16,   29,   18,   16,\n",
-      "           20,   18,  698,  241,  125,  163,   19,   20,  125,  165,   19,   29,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  125,  170,  162,  541, 1165, 1186,  125,   34,  170,   10,  162,\n",
-      "           34,  541,  241,  575,  962, 1514,  228,   16,  125,   18,   34,  228,\n",
-      "           16,  170,   18,  257,  228,   16,  162,   18,   34,  228,   16,  541,\n",
-      "           18,  228,   16,  125,   18,   34,  228,   16,  170,   18,  257,  228,\n",
-      "           16,  162,   18,   34,  228,   16,  541,   18,   36,  125,   19,  170,\n",
-      "           36,   22,   36,  162,   19,  541,   36, 1515,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   12,   19,   29,   26,   23,   26,   29,   26,\n",
-      "           17,   25,   28,   10,   11,   12,   13,   36,   13,   15,   16,   17,\n",
-      "           18,  163,   29,   24,   25,    9,   31,   28,   10,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 61,  13,  79, 159,  11,  12, 160, 161,  16, 277,  18,  17,  13,  34,\n",
-      "          20,  79,  19,  20, 163,  23, 164,  17,  13,  19,  20,  79,  34,  20,\n",
-      "         165,  23, 164,  79,  34,  20, 589,  23, 166, 161,  24, 167,  33,  10,\n",
-      "          17,  13,  34,  79, 111,  91,  27,  93,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [738,   7, 112, 113,  91,  13,  93,  10,  17,  13,  15,  16,  20,  18,\n",
-      "          19, 641,  15,  16,  17,  18,  34, 170, 250, 113,  91,  13,  93, 251,\n",
-      "         252, 125,  26, 170, 113,  91,  13,  93, 546, 111, 168, 229, 794, 125,\n",
-      "          26, 170, 610, 449,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [271, 272, 273, 178, 274, 275, 276, 102, 173,  65,  92,  16,  29,  18,\n",
-      "         178,  79,  10, 278,  36,  13,  36,  34,  17, 140, 141, 280,  13, 281,\n",
-      "         282, 283, 284, 285, 272, 173,  65,  92,  16,  17,  18, 286, 178, 287,\n",
-      "          15,  16,  17,  18,  34,  17, 287, 114, 288,  19,  20,  10,  23, 229,\n",
-      "          65,  92,  16,  17,  18, 274, 178,  65,  92,  16,  29,  18,  65,  92,\n",
-      "          16,  17,  18, 380, 381, 149, 289,  68, 229,  65,  92,  16,  29,  18,\n",
-      "         178,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7, 125,  10,  17,  15,  16, 116,  16,  21,  18,  16,  20,  18,  18,\n",
-      "         170,  10,  20,  15,  16, 116,  16,  17,  18,  16,  20,  18,  18, 162,\n",
-      "          10, 214,  15,  16, 116,  16,  29,  18,  16,  20,  18,  18,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,  750,   83,   16,   63,   18,   19,   83,   16,    9,   18,   92,\n",
-      "           16,   29,   18,   83,   16,   28,   18,   92,   16,   29,   18,   83,\n",
-      "           16,   65,   18,   92,   16,   29,   18,   83,   16,   66,   18,   92,\n",
-      "           16,   29,   18,  102,  153,   10,  182,  154,   10,   96,   83,   16,\n",
-      "          468,   18,   92,   16,   29,   18,   10,  134,   68,  256,  584,  135,\n",
-      "            9,   92,   16,   29,   18,   28,   92,   16,   29,   18,   66,   92,\n",
-      "           16,   29,   18,   65,   92,   16,   29,   18,    9,   92,   16,   29,\n",
-      "           18,  256,   10,   66,   92,   16,   29,   18,  135,   10,   21,  106,\n",
-      "          256,  584,  135,  242,  384,  750,  718,  374, 1504,  858,   52,  121,\n",
-      "          964,  794,   52, 1506,  449,  229,  107, 1162,  242,  384,  719,  720,\n",
-      "          610,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 501,  368,   17,   15,   16,  125,   18,   34,  126,   92,   16,   17,\n",
-      "           18,  125,   10,   21,   15,   16,  170,   18,   34,   17,  126,   92,\n",
-      "           16,   21,   18,  170,   26,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  214,   18,   34,  116,   16,   79,   15,   16,   17,   18,   18,\n",
-      "           16,  171,   15,   16,   17,   18,   18,   10,   29,   91,   23,   22,\n",
-      "          171,   22,   30,   93,  457,  116,   16,  228,   16,  483,   18,   18,\n",
-      "           16,   21,   18,    9,   28,   65,  258,  259,  233,  229,   65,  178,\n",
-      "          567,  142,   65,   68,  568,  107,   13,   10,  105,   36,  569,   36,\n",
-      "           10,   36,  570,   14,   26,   27,  569,  172,  570,  229,  145,  571,\n",
-      "           53,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 965,  447,  966,  967,  968,  969,  131,  667,  970,  971,  131,  667,\n",
-      "          972,   81,  898,   83,   16,  973,   18,   92,   16,   29,   18,   26,\n",
-      "           27,   83,   16,  973,   18,   92,   16,   17,   18,   26,   27,  721,\n",
-      "           26,   27,   83,   16,  973,   18,   92,   16,  131,   18,  446,  702,\n",
-      "          102,  965,  966,  972,  974,  975,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,   65,   92,   16,   29,   18,   65,   92,   16,   17,   18,  273,\n",
-      "          178,   65,   92,   16,   29,   18,   11,   12,  160,  161,   16,  277,\n",
-      "           18,   13,   10,   21,  114,   15,   16,   17,   18,  288,  164,   79,\n",
-      "           10,   21,  230,   15,   16,   17,   18,  288,  166,  161,   24,  167,\n",
-      "          288,  273,   65,   92,   16,   17,   18,   11,   12,  160,  161,   16,\n",
-      "          277,   18,   13,   10,  279,   34,  116,   16,   29,   18,   16,  279,\n",
-      "           18,  164,   79,   10,  279,   19,  116,   16,   29,   18,   16,  279,\n",
-      "           18,  166,  161,   24,  167,  279,  273,   65,   92,   16,   29,   18,\n",
-      "           65,   92,   16,   17,   18,  273,  178,  480,  178,  140,  141,  280,\n",
-      "           13,  281,  282,  283,  284,  285,  272,   61,   65,   92,   16,   29,\n",
-      "           18,   65,   92,   16,   17,   18,  267,    0],\n",
-      "        [  13,   26,   27,   79,  159,   11,   12,  160,  161,   16,  277,   18,\n",
-      "           13,   34,   79,   19,   30,  578,   23,  164,   17,   13,   19,   79,\n",
-      "           19,   29,  589,   23,   26,   27,  478,   16, 1487,   18,   33,   10,\n",
-      "           17,   13,   34,   79,  478,   16, 1488,   18,  164,   13,   19,   17,\n",
-      "           79,   34,   29,  578,   23,  166,  161,   24,  167,    4,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  136,   65,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           91,  125,  257,   23,   26,  170,  257,   23,   93,  258,  259,  139,\n",
-      "          135,   92,   16,   29,   18,   26,  135,   92,   16,   17,   18,  135,\n",
-      "           92,   16,   29,   18,  107,   65,  359,  360,  361,    9,   26,   28,\n",
-      "          362,  261,   16,  135,   92,   16,   29,   18,    9,   18,   10,  261,\n",
-      "           16,  153,   18,   26,  261,   16,  135,   92,   16,   29,   18,   28,\n",
-      "           18,  263,  261,   16,  135,   92,   16,   17,   18,   28,   18,   10,\n",
-      "           23,   65,  457,  179,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,   19,   13,   15,   16,   21,   18,   34,   13,   15,\n",
-      "           16,   17,   18,   34,   17,  120,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,   83,   16,  135,   18,   92,   16,   29,   18,   26,   83,   16,\n",
-      "          135,   18,   92,   16,   17,   18,  136,   83,   16,   65,   18,  137,\n",
-      "          116,   16,   83,   16,   13,   18,   15,   16,   17,   18,   18,   16,\n",
-      "           83,   16,  125,   18,   15,   16,   17,   18,   18,   19,  116,   16,\n",
-      "           83,   16,   79,   18,   15,   16,   17,   18,   18,   16,   83,   16,\n",
-      "          170,   18,   15,   16,   17,   18,   18,   10,   29,   91,   83,   16,\n",
-      "          125,   18,  257,   23,  167,   83,   16,  170,   18,  257,   23,   93,\n",
-      "          258,  259,  139,   62,  140,  141,   83,   16,  135,   18,   92,   16,\n",
-      "           17,   18,  585,   83,   16,   65,   18,  175,  360, 1221, 1571,   83,\n",
-      "           16,  142,   18,   26,   36,  146,   92,   16,   29,   18,   36,   10,\n",
-      "          228,   16,  105,   18,   36,   83,   16,    0],\n",
-      "        [  61,   62,  140,  141,  265,  464,  255,   65,  464,   11,   91,   13,\n",
-      "           92,   16,   23,   18,   26,   79,   92,   16,   23,   18,   24,   93,\n",
-      "          464,  585,   13,  456, 1221, 1571,  465,   68,  142,  261,   16,   83,\n",
-      "           16, 1615,   18,   18,   10,  228,   16,   17,   18,  261,   16,   83,\n",
-      "           16, 1616,   18,   18, 1180,  142,  512,  178, 1270,  568,  107,   13,\n",
-      "          822,  261,   16,   83,   16,  144,   18,   18,  263,  261,   16,   83,\n",
-      "           16, 1256,   18,   18,   10,   29,  241,  106,  142,  591, 1617,  107,\n",
-      "          277,   65,  258,  139,  135,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  126,   92,   16,   17,   18,\n",
-      "           11,   91,   13,   15,   16,   17,   18,   34,  125,   24,   93,  113,\n",
-      "           91,   20,   93,   10,   29,  125,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  226,    9,   28,   65,  125,  170,  162,    7,   65,   10,\n",
-      "          351,   15,   16,   82,   18,   26,  170,   10,  228,   16,  105,   18,\n",
-      "           26,  162,   10,   20,    9,  179,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   10,   12,   19,   29,   26,   23,   26,   29,   26,\n",
-      "           17,   25,   28,   10,   11,   12,   13,   36,   13,   15,   16,   17,\n",
-      "           18,  163,   29,   24,   25,    9,   31,   28,   10,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 882,  242,  801,  802,  631,  520,  231,  801,  247,  631,  247,   60,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  384,  294,   11,   91,   23,   26,  116,   16,  117,   18,   16,\n",
-      "           17,   18,   24,   93,   26,  521,  384,   10,   17,  114,   11,   91,\n",
-      "          384,   19,  116,   16,  117,   18,   16,   21,   18,   24,   93,  179,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   62,  140,  141,  135,  255,   65,  137,  116,   16,   13,   15,\n",
-      "           16,   17,   18,   18,   16,  125,   15,   16,   17,   18,   18,   34,\n",
-      "          116,   16,   79,   15,   16,   17,   18,   18,   16,  170,   15,   16,\n",
-      "           17,   18,   18,   10,   29,   27,   91,  125,  257,  170,  257,   23,\n",
-      "           93,  258,  139,    9,   28,   65,  258,  259,  233,  142,   65,  238,\n",
-      "          146,  172,   13,  456,  106,    9,  107,  277, 1089,  146,  515,   68,\n",
-      "          464,   79, 1220,   68,  256,  107, 1047,  517,  466,   65,  457,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  135,  136,   65,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,\n",
-      "           29,   27,   91,  125,  257,   23,   26,   27,  170,  257,   23,   93,\n",
-      "          259,  139,   62,  140,  141, 1416,  604,  104,  104,   13,   15,   16,\n",
-      "           17,   18,   34,   79,   15,   16,   17,   18,   10,  125,   15,   16,\n",
-      "           17,   18,  515,  142,  568,  362,   36, 1256,   36,   36, 1416,   36,\n",
-      "           65,  457,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  113,   91,   13,   93, 1423,  573, 1222,   91,   23,   26,   34,\n",
-      "          887,   93,  251,  799,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  463,   63,  242, 1383, 1384, 1245,   16,   83,   16,  269,   18,\n",
-      "           18,  242,  352,  464, 1245,   16,   83,   16,  269,   18,   18, 1385,\n",
-      "           65,   66,   68,  241,  242, 1386,  815,  242, 1387, 1089,  467,   68,\n",
-      "          142,   83,   16, 1388,   18,  469,  469,  242, 1389,  449,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  102,   28,   10,  116,   16,  117,   18,   16,   21,   18,\n",
-      "          154, 1067, 1212,  116,   16,   29,   18,   16,   20,   18,  154,  230,\n",
-      "            9,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   13,   19,   29,   19,  885,\n",
-      "           16,  125, 2019,   18,   13,  113,   91,   13,   93,  589,   23,   26,\n",
-      "          229,  125,  610,   61,  171, 1546,  378,  697,  131,   26,   11,   91,\n",
-      "           29,   34,  116,   16,   29,   18,   16,   17,   18,   24,   93,   11,\n",
-      "           91,   29,   34,  116,   16,   29,   18,   16,   17,   15,   16,   17,\n",
-      "           18,   18,   24,   93,  721,   11,   91,   29,   34,  116,   16,   29,\n",
-      "           18,   16,   17,   15,   16,  131,   18,   18,   24,   93,   22,  171,\n",
-      "           26,  229,  171,  111,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   83,   16,  135,   18,   92,   16,   29,   18,   26,   83,   16,\n",
-      "          135,   18,   92,   16,   17,   18,  255,   65,  137,  116,   16,   13,\n",
-      "           15,   16,   17,   18,   18,   16,  125,   15,   16,   17,   18,   18,\n",
-      "           34,  116,   16,   79,   15,   16,   17,   18,   18,   16,  170,   15,\n",
-      "           16,   17,   18,   18,   10,   29,   27,   91,  125,  257,  170,  257,\n",
-      "           23,   93,  258,  259,  139,    9,   65,  258,  233,   68,  142,    9,\n",
-      "          177,  116,   16,  228,   16,   20,   18,   18,   16,  105,   18,  107,\n",
-      "          145,   83,   16,  146,   18,   92,   16,   29,   18,   83,   16,  135,\n",
-      "           18,   92,   16,   17,   18,  957,  669,  239,   83,   16,  135,   18,\n",
-      "           92,   16,   29,   18,   83,   16,  135,   18,   92,   16,   17,   18,\n",
-      "           83,   16,  142,   18,   10,  819,   15,    0],\n",
-      "        [ 113,   91,   13,   93,   10,   11,   36,   13,   19,  125,   15,   16,\n",
-      "           17,   18,   24,   36,   34,   36,   13,   34,   17,  125,   19,   29,\n",
-      "           36,  125,   10,   17,  249,  229,  290,  113,   91,   13,   93,  165,\n",
-      "           21,  293,  113,   91,   13,   93,  165,   21,   26,  229,  125,  254,\n",
-      "          481,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  641,   15,   20,   19,   17,\n",
-      "           13,  797,  106,   91,   19,   29,  584,   21,   93,  125,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[106,  91,  17,  26,  29,  93, 104, 220, 356, 357, 234, 107,  17,  13,\n",
-      "          19,  79,  19,  20,  10,  23, 358,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [112,  79,  10, 230,  13,  19, 228,  16,  20,  18, 114,  13, 797, 112,\n",
-      "          79,  10,  17, 230,  13, 797, 348, 259, 876,   4,  81, 110,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7, 169, 889,  16,  83,  16, 125,  18,  18,  10,  91,  29,  26, 171,\n",
-      "          93, 889,  16, 170,  18,  10,  91,  20,  26,  19,  17,  93,  91, 889,\n",
-      "          16,  83,  16, 125,  18,  18,  34, 889,  16, 170,  18,  93, 172, 889,\n",
-      "          16, 170,  18, 171,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7, 125, 257,  23,  26,  27, 170, 257,  23,  26,  27, 125,  15,  16,\n",
-      "          20,  18,  34, 170,  15,  16,  20,  18,  10,  17, 167,  27, 241,  91,\n",
-      "         125,  34, 170,  93,  11,  91, 125,  15,  16,  30,  18,  34, 170,  15,\n",
-      "          16,  30,  18,  24,  93, 589,  21, 125,  34, 170, 163,  17,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7, 1158,  169,  296,   16,  125,   18,   26,  296,   16,  170,   18,\n",
-      "           36,  125,   36,   10,   17,   36,  170,   36,   91,  296,   16,  125,\n",
-      "           18,   19,  296,   16,  170,   18,   93,  172,  296,   16,  170,   18,\n",
-      "          296,   16,  125,   18,  296,   16,  170,   18,  350,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   17,  114,   15,   16,   17,\n",
-      "           18,   13,   19,  230,   15,   16,   17,   18,   13,   34,   17,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  397, 1630,  829, 1253,  829, 1631, 1632, 1633,   79,   81, 1634,\n",
-      "         1230, 1252,  397, 1635,  829, 1631, 1632, 1633,  284,   79, 1375, 1358,\n",
-      "          279,  138, 1249, 1250,  489, 1630,  829, 1253,  829,   90, 1375, 1358,\n",
-      "          279,  610,  300,  837, 1048,  284,  489, 1636,   16,   79,   18,   10,\n",
-      "           19, 1637,   34, 1638,  279, 1639,  829, 1253,  829,   90, 1375, 1358,\n",
-      "          279,  610,  300,  837,  284,  489, 1636,   16,   79,   18,   10, 1622,\n",
-      "           34, 1640,  279, 1429,  138,  489,  429,  397, 1635,  829, 1631, 1632,\n",
-      "         1633, 1641,  489, 1641,  443, 1642,  449,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  519,  520,  149,  523,  878,  879,  359,  880,  352,  523,  804,\n",
-      "          519,  247,  116,   16,  881,  117,   18,   16,   20,   18,  158,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   10,   12,   29,  584,   17,  584,   20,  584,   21,\n",
-      "           25,  584,   28,   10,   12,   17,  584,   21,  584,  105,  584,  134,\n",
-      "           25,    9,   31,   28,  102,  484,  307,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 862,  863,  864,  865,  866,  867,  868,  102,  869,  870,  871,  102,\n",
-      "          872,  870,  871,  102,  873,  874,  868,  871,   71,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   10,   91,   17,   26,   17,   93,\n",
-      "           26,  889,   16,  170,   18,   10,   91,   19,  134,   26,  105,   93,\n",
-      "          114,   22,  889,   16,  125,   18,   26,  889,   16,  170,   18,  257,\n",
-      "           10,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   11,   12,  160,  161,   16,\n",
-      "         1079,   18,  248,   15,   16,   13,   18,   26,  744,   13,  578,   23,\n",
-      "          164,  174,   13,   26,  744,   13,  257,   23,  166,  161,   24,  167,\n",
-      "          477,   91,   13,   93,   10,  113,   91,   13,   93,   34,   13,   34,\n",
-      "          125,  477,   13,  253,  125,  254,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  7,  68, 464, 513,  65,  79,  15,  16,  17,  18,  10,  21,  83,  16,\n",
-      "          13,  18,  26,  65, 139, 177, 278, 107,  65, 515,   9,  28, 362, 239,\n",
-      "          83,  16, 999,  18,  10, 201,  15,  16,  82,  18, 278,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 91,  29,  34,  35,  93,  27,  91,  17,  19,  35,  93,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7, 169, 889,  16, 125,  18,  10,  91,  19,  17,  26,  20,  93,  26,\n",
-      "         889,  16, 170,  18,  10,  91,  20,  26, 171,  93, 889,  16, 125,  18,\n",
-      "         172, 889,  16, 170,  18, 171, 179,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7, 135, 136,  65, 137, 116,  16,  13,  15,  16,  17,  18,  18,  16,\n",
-      "         125,  15,  16,  17,  18,  18,  19, 116,  16,  79,  15,  16,  17,  18,\n",
-      "          18,  16, 170,  15,  16,  17,  18,  18,  10,  29,  91, 125, 257,  23,\n",
-      "          26, 170, 257,  23,  93, 259, 139,   9,  65, 259, 233,  28,  65, 590,\n",
-      "         562, 591,  13, 456, 153, 177,  65, 457,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 212,  209,  611,  612,  613,  614,  615,  616,  496,  617,  618,  619,\n",
-      "          614,  181,  620,  621,  614,  138,  622,  623,  624,  614,  625,  623,\n",
-      "          626,  614,  627,  626,  623,  628,  629,  619,  630,  619,  631,  632,\n",
-      "          633,  614,  628,  629,  619,  622,  634,  635,  614,  636,  620,  212,\n",
-      "          209,  614,  220,  623,   61,  624,  614,  635,   71,  116,   16,   29,\n",
-      "           18,   16,   17,   18,  222,  637,  638,   71,  229,  639,  614,   71,\n",
-      "          640,  634,  635,   71,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  800,  232, 1516,  519,  520,  519,  158,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  107,  502,   13,   19,  228,   16,   20,   18,   79,   34,  105,\n",
-      "           10,   23,  104,   13,   15,   16,   17,   18,   34,   79,   15,   16,\n",
-      "           17,   18,   10,  298,  515,    9,   28,  362,    9,   28,  585,  277,\n",
-      "         1221,   13, 1220,   65,   66,  362,   36,  269,   36,  179,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [2139,  829, 1194, 1097, 2140, 2141, 2142, 1211, 2143, 2144,  621, 2145,\n",
-      "         2146, 2147,  764, 2148, 2149, 2145, 2146, 2147, 2150, 2151, 2152, 2142,\n",
-      "         2153, 2150, 2154, 2140, 2141, 2155, 2156, 2157, 2157, 2158, 1194, 2159,\n",
-      "         1097, 2160,   92,   16,   17,   18,   68, 2161, 2162, 2160,   92,   16,\n",
-      "           17,   18,   68, 2163, 1274, 1194, 2164, 2066,   61, 2165, 1438,  464,\n",
-      "           92,   16,   29,   18, 2145, 1438,  464,   92,   16,   17,   18, 1194,\n",
-      "          358,  573, 2160,   92,   16,   17,   18, 2166, 2145,  358,  451, 2167,\n",
-      "         2168, 2169, 2170,  451,  178,  116,   16,  464,   92,   16,   29,   18,\n",
-      "           18,   16,   91,  573,   34,  451,   93,   15,   16,   17,   18,   18,\n",
-      "           34,  116,   16,  464,   92,   16,   17,   18,   18,   16,  451,   15,\n",
-      "           16,   17,   18,   18,   10,   91,  573,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 513,   65,   79,   15,   16,   13,  139,  135,  177,  107,  361,   65,\n",
-      "          853,  464,  464,   13,  456, 1592,  277,   65,  458,   68,  465,  277,\n",
-      "           83,   16,  470,   18,  172,  277,  464,  107, 1593,  358,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  174,   11,   91,   13,   15,   16,\n",
-      "           17,   18,   19,   17,   13,   19,  134,   24,   93,  251,  888,  546,\n",
-      "           91,   27,   93,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 242,  164, 1776,  882,    9,   28,   65,   66,    9,   16,   28,   16,\n",
-      "           65,   16,   66,   16,  233,    9,  164, 1776,  164, 1777,   16,  242,\n",
-      "          164, 1778,   16,  883,   16,  164, 1778,   16,   66,   16,  164, 1776,\n",
-      "          164, 1779,  242,   63,  171,  164, 1776, 1780,  242,  884,   16,  164,\n",
-      "         1778,   16,    9,   16,  164, 1778,   16,  131, 1487,  164, 1778,   16,\n",
-      "          171,  164, 1778,   16,  131, 1781,  164, 1782,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   10,   19,   17,  112,  113,   91,   13,   93,   10,   11,   91,\n",
-      "           13,   15,   16,   17,   18,   34,  641,   19,   29,   24,   93,  248,\n",
-      "           15,   16,   13,   19,   29,   18, 1113,   68,  113,   91,   13,   93,\n",
-      "         2032,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 271,  290,  291,    7,  125,  584,  170,  584,  162, 1186,  574,   10,\n",
-      "           29,  241,  116,   16,   29,   18,   16,  125,   18,   34,  116,   16,\n",
-      "           29,   18,   16,  170,   18,   34,  116,   16,   29,   18,   16,  162,\n",
-      "           18,  163,  125,   15,   16,   17,   18,   34,  170,   15,   16,   17,\n",
-      "           18,   34,  162,   15,   16,   17,   18,   91,  125,   34,  170,   93,\n",
-      "           15,   16,   20,   18,   34,   91,  170,   34,  162,   93,   15,   16,\n",
-      "           20,   18,   34,   91,  162,   34,  125,   93,   15,   16,   20,   18,\n",
-      "          165,  354,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   52,   63,  979,  980,   40,  981,   52,  982,  102,  983,  984,\n",
-      "           52,   64,  985,  986,   52,  530,  987,  238,  988,  989,  983,   71,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  230,   11,   91,   17,   13,   34,\n",
-      "          116,   16,   20,  117,   18,   16,   17,   18,   24,   93,   19,   20,\n",
-      "          114,   13,  111,    4,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 106,  104,  220,  356,  357,  234,  107,   17,   13,   19,   79,   19,\n",
-      "           20,   10,   23,  358,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 274,  275,  276,  102,  173,   65,   92,   16,   29,   18,  273,  178,\n",
-      "           11,   12,  160,  161,   16,  277,   18,   83,   16,   13,   18,   10,\n",
-      "           83,   16,  125, 1513,  279,   18,   27,   91,   83,   16,  279,   18,\n",
-      "          478,   16,  479,   18,   26,   83,   16,  125,   18,  257,   23,   93,\n",
-      "          167,  478,   16, 1807,   18,  164,   83,   16,   79,   18,   10,   29,\n",
-      "           34,   83,   16,  125,  886,  279,   18,  166,  161,   24,  167,  140,\n",
-      "          141,  280,   13,  281,  282,  283,  285,  272,  102,  173,   65,   92,\n",
-      "           16,   17,   18,  287,   10,   21,  114,  288,   65,   92,   16,   29,\n",
-      "           18,  963,  173,   65,   92,   16,   29,   18,  178,  480,  286,  178,\n",
-      "          107,   65,   92,   16,   20,   18,  286,  178,  288,   10,  384,   92,\n",
-      "           16,   23,   18,   26,  384,   92,   16,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  102,   66,  154,   68,  594, 1493,  239,\n",
-      "           83,   16, 1494,   18,   26,   27,   83,   16,  813,   18,   10,   17,\n",
-      "           83,   16, 1009,   18,  229,  116,   16,  230,  239,   83,   16,   28,\n",
-      "           18,   18,   16,  230,  239,   83,   16,   65,   18,   18,  239,   83,\n",
-      "           16, 1494,   18,   10,  351,   15,   16,   82,   18,   26,   27,  229,\n",
-      "          239,   83,   16,   28,   18,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1273,  242,   32,   33,   10,   35,   91,   19,   17,   34,   35,   93,\n",
-      "           68, 1274,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  232,   59,  523,  524,  525,  232,  523,  157,  247,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,  464,   10,   12,   13,   36,   19,   21,   22,   13,   22,\n",
-      "           17,   25,  584,  465,   10,   11,   12,   13,   36,   13,   15,   16,\n",
-      "           17,   18,   19,   13,   19,  105,   22,   23,   24,   25,   26,  464,\n",
-      "           31,  465,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 980, 1320, 1321, 1322, 1323, 1324, 1325, 1324, 1326, 1327, 1328, 1329,\n",
-      "         1330, 1324,  686,  750, 1327, 1331, 1332, 1323, 1324, 1333, 1329, 1323,\n",
-      "         1324, 1334, 1335,  750, 1336, 1337, 1329, 1323, 1324,  692,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738,  363,  151,  226,    9,   26,   28,   26,   65,  125,   26,  170,\n",
-      "           26,  162,    7,  125,  230,  116,   16,    9,   34,   65,   18,   16,\n",
-      "           17,   18,   10,  170,  230,    9,  229,   28,  363,  151, 1460,  669,\n",
-      "          162,   10,   29,  229,  363,  151,   53,  254,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,   17,  230,   17,   13,  797,  258,  876,  116,   16,\n",
-      "          117,   18,   16,  298,   18,   81,  110,  876,  797, 1783,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,  113,   91,   13,   93,   10,   13,   15,   16,   21,   18,   19,\n",
-      "           17,   13,   15,   16,   20,   18,  120,   68,   91,   29,   26,  113,\n",
-      "           91,   29,   93,   93,  579,  176,  178,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  226,    9,   28,   65,  125,  170,  162,\n",
-      "            7,  230,   91,    9,   34,   65,   93,   10,  134,  230,   15,   16,\n",
-      "           17,   18,  116,   16,   28,   18,   16,   17,   18,  229,  114,   28,\n",
-      "          125,   34,  162,   10,  105,  145,   83,   16,  151,   18,   53,  229,\n",
-      "          170,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  174,   13,   34,  174,   91,\n",
-      "           17,   19,   13,   93,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   49,   47,  142,  822,   63,  102,   55, 1007,   56,  591,   59,\n",
-      "           63,  153,   10,  154,   10,  116,   16,   29,   18,   16,   17,   18,\n",
-      "          594,   26,   27,  239, 1179,   10,  239,  151,   10,  201,   15,   16,\n",
-      "           82,   18,  256, 1008,  466,  241,  107,   83,   16,  855,   18,  469,\n",
-      "          469,  242,  243,   68,  464,  558,  608,  107, 1047,   59,   63, 1074,\n",
-      "         1075,  703,  820,  229,  607,   83,   16,  464,   18,   19,   83,   16,\n",
-      "          153,   18,   19,   83,   16,   66,   18,  609,  610,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[247, 882, 233, 148, 148, 158,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [136, 116,  16,  13,  15,  16,  17,  18,  18,  16, 125,  15,  16,  17,\n",
-      "          18,  18,  19, 116,  16,  79,  15,  16,  17,  18,  18,  16, 366,  18,\n",
-      "          10,  29,  27,  91, 125, 257,  23,  93, 175, 360, 178,  79,  10, 116,\n",
-      "          16,  20,  18,  16,  30,  18,  13, 125, 179,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [107,  79,  10, 566,  34, 170, 173,  79,  10, 174,  13,  34,  17, 176,\n",
-      "         173,  79,  10, 174,  91,  13,  34,  29,  93, 176, 170, 179,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 61,  62, 140, 141, 107,  13,  10, 125, 136, 116,  16,  13,  15,  16,\n",
-      "          17,  18,  18,  16, 125,  15,  16,  17,  18,  18,  19, 116,  16,  79,\n",
-      "          15,  16,  17,  18,  18,  16, 170,  15,  16,  17,  18,  18,  10,  29,\n",
-      "          91, 125, 257,  23,  26, 170, 257,  23,  93, 359, 360, 361,  66,  26,\n",
-      "         256, 362, 363, 364,  53, 134,  26,  65, 365, 111,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  349,  296,   16,  125,   18,  296,   16,  170,   18,  350,  703,\n",
-      "           15,   16,   82,   18,  278,  296,   16,  125,   18,   19,  296,   16,\n",
-      "          170,   18,  296,   16,  125,   18,  352,  278,   10,    4,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  153,  150,   83,   16,   62,   18,  604,  155,  150,   83,   16,\n",
-      "           62,   18,  176,  154,  361,  150,   83,   16,   62,   18,  853,  256,\n",
-      "           66,  155,  466,  241,  560,  150,   83,   16,   62,   18,  176,  854,\n",
-      "           10,  228,   16,   20,   18,  855,  229,  239,  856,  857,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  107,  277, 1312,   34,   79,   34,   20,  171,   19,  228,   16,\n",
-      "           20,   18,   10,   23,  104,   13,   15,   16,   17,   18,   34,   79,\n",
-      "           15,   16,   17,   18,   10,  298,  515,    9,   28,  362,    9,   28,\n",
-      "          585,  277, 1221,   13, 1220,   65,   66,  362,   36,  153,   36,   10,\n",
-      "           17,  228,   16,   20,   18,   36,  269,   36,   10,  179,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  915,   63,  102,  145,  151,  236,  594,   10,  269,  241,  155,\n",
-      "          172,  813,    7,  145,  823,  395,  153,   10,  813,  256,  558,  813,\n",
-      "           66,  455,   68,  603,  172,  821,  229,  915, 1310,  915, 1311,  247,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 72,  73,  74,  75,  76,  77,  78,  79,  80,  13,  81,  15,  16,  82,\n",
-      "          18,  83,  16,  65,  18,  84,  85,  80,  86,  87,  88,  89,  89,  90,\n",
-      "          11,  91,  13,  92,  16,  35,  18,  26,  79,  92,  16,  35,  18,  24,\n",
-      "          93,  91,  35,  10,  29,  26,  17,  26,  94,  26,  85,  93,  95,  95,\n",
-      "          96,  15,  16,  82,  18,  83,  16,  65,  18,  97,  15,  16,  82,  18,\n",
-      "          83,  16,  65,  18,  98,  99, 100, 101, 102, 103,  78,  79,  80,  13,\n",
-      "         100, 101,   3,   3,   3,   3,   3,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [581,  11,  91,  13,  15,  16,  17,  18,  34, 116,  16,  17,  18,  16,\n",
-      "          13,  18,  24,  93,  15,  16, 105,  18, 582, 102, 731, 732,   4, 733,\n",
-      "         734,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [704, 308, 705, 612, 706, 330, 707, 708, 709, 710, 711, 612, 706, 706,\n",
-      "         348, 712, 705, 528, 712, 413, 179,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7, 112, 113,  91,  13,  93,  10,  36,  13,  34,  29,  36,  19,  17,\n",
-      "          36,  13,  19, 125,  36,  26, 125, 257,  23, 125,  10,  29, 249, 229,\n",
-      "         290, 113,  91,  13,  93, 257,  29, 293, 113,  91,  13,  93, 797,  13,\n",
-      "         456, 858,  56,  53, 754, 229, 125, 254,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,   62,  140,  141,  135,  255,   65,  116,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   16,  125,   15,   16,   17,   18,   18,   34,  116,\n",
-      "           16,   79,   15,   16,   17,   18,   18,   16,  170,   15,   16,   17,\n",
-      "           18,   18,   10,   29,   27,   91,  125,  257,  170,  257,   23,   93,\n",
-      "          258,  139,    9,   28,   65,  258,  259,  233,  142,   65,  238,  146,\n",
-      "          172,   13,  456,  106,    9,  107,  277, 1089,  146,  515,   68,  464,\n",
-      "           79, 1220,   68,  256,  107, 1047,  517,  466,   65,  457,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1213, 1214,   52,   51, 1215, 1216,  292,  519,  520,  519,  242,\n",
-      "          800,  801,  802,  877,  519,  247,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  800,   59,   64,   83,   16,   62,   18,   92,   16,   29,   18,\n",
-      "           26,   83,   16,   62,   18,   92,   16,   17,   18,  107,   83,   16,\n",
-      "           62,   18,   92,   16,   29,   18,   83,   16,   62,   18,   92,   16,\n",
-      "           17,   18,  242, 1064,  800,  877, 1065,   53,   52,  800,  158,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1124, 1125, 1126, 1127, 1128, 1129,  110, 1129, 1130,  110,  116,   16,\n",
-      "          228,   16,   30,   18,   19,   29,   18,   16,   17,   18,  116,   16,\n",
-      "          228,   16,   30,   18,   19,   29,   18,   16,   17,   18, 1131,  662,\n",
-      "         1132, 1060, 1133, 1134, 1135, 1136, 1126, 1127, 1128, 1137,  110, 1137,\n",
-      "         1129,  110,  116,   16,  228,   16,   30,   18,   19,   29,   18,   16,\n",
-      "           17,   18, 1138,  138, 1132, 1060, 1139,  525, 1140, 1128, 1141, 1142,\n",
-      "          110, 1143, 1019, 1144,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   16,   28,   10,   12,   13,   36,   91,   13,   34,\n",
-      "           29,   93,   91,   13,   19,   17,   93,   22,   23,   26,   13,  294,\n",
-      "          295,   25,    9,  644,   28,   54,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   13,   15,   16,   20,   18,\n",
-      "           34,   91,  125,   19,   29,   93,   13,   15,   16,   17,   18,   34,\n",
-      "          641,  113,   91,   13,   93, 1066,  173,   79,   10,  113,   91,   13,\n",
-      "           93,   68,  990,   23,  584,   23,  991,  579,  176,  178,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  125,  170,   36,  125, 1647,  170,   36,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  102,   66,  154,   68,  594, 1493,  239,   83,   16, 1494,\n",
-      "           18,  145,   83,   16, 2016,   18,   53,  145,   83,   16, 1903,   18,\n",
-      "           53, 2043,  229,  116,   16,  230,  239,   28,   18,   16,  230,  239,\n",
-      "           65,   18,   83,   16,  594,   18,   10,   29,   83,   16, 1009,   18,\n",
-      "           10,  116,   16,  228,   16,   17,   18,   18,   16,   17,   18,  229,\n",
-      "          813,  155, 1595,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 764, 1884, 2130, 2131,   76,  102, 2132, 2133, 2131,  754,  994,  138,\n",
-      "         2134,  596,   10,  133,   34, 1119,  339,  596, 2134,  102,  530, 1367,\n",
-      "          138,  433,   54,  596,   71,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93,   10,   36,   13,   19,  125,   36,   13,\n",
-      "           34,   36,   13,   19,   17,   36,   91,   13,   19,  125,   93,  125,\n",
-      "           10,   29,  249,  229,  290,  113,   91,   13,   93,   22,   23,  293,\n",
-      "           13,  294,   91,   19,  887,   26,   29,   93,  249,  113,   91,   13,\n",
-      "           93,   22,   23,  229,  125,  254,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301,   83,   16,  353,   18,   92,   16,  131,   18,  370,   11,   12,\n",
-      "          125,   92,   16,  131,   18,   24,   25,  181,  131,  183,    7,  125,\n",
-      "           92,   16,   29,   18,   10,   19,  133,   26,   27,  353,   92,   16,\n",
-      "           20,   18,   10,   19,  483,  229,   11,   12,  125,   92,   16,  131,\n",
-      "           18,   24,   25,  526,  527,  229,   83,   16,  353,   18,   92,   16,\n",
-      "          131,   18,  914,   83,   16,  353,   18,   92,   16,  131,   18,  111,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  248,   15,   16,   17,   13,\n",
-      "           18,   19,  125,  174,   13,  250,  113,   13,  850,  112,  113,  851,\n",
-      "           13,  253,  307,  241,  125,  249,  113,   91,   13,   93,  589,   17,\n",
-      "          125,   34,  125,  174,  116,   16,   17,   18,   16,  125,   18,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  125,  170,  162,  541, 1165, 1186,  125,  170,  162,  541,  241,\n",
-      "          575,  257, 1514,   26,   27,  228,   16,  125,   18,   34,  228,   16,\n",
-      "          170,   18,  257,  228,   16,  162,   18,   34,  228,   16,  541,   18,\n",
-      "          228,   16,  125,   18,   34,  228,   16,  170,   18,  257,  228,   16,\n",
-      "          162,   18,   34,  228,   16,  541,   18,   36,  125,   19,  170,   36,\n",
-      "           22,   36,  162,   19,  541,   36, 1515,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1409, 1897, 1409, 1898, 1899,  330, 1900,  614,  348, 1409, 1897, 1901,\n",
-      "          969, 1902,  179,  733, 1613, 1784,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  83,   16,   13,   18,   26,   79,  159,   11,   12,  160,  161,   16,\n",
-      "          277,   18,   83,   16,   13,   18,   19,   83,   16,   79,   18,  589,\n",
-      "           23,  164,   83,   16,   13,   18,   34,   83,   16,   79,   18,   19,\n",
-      "           17,  578,   23,   26,  478,   16, 1487,   18,   83,   16,   33,   18,\n",
-      "           10,   20,   83,   16,   13,   18,   19,   21,   83,   16,   79,   18,\n",
-      "          478,   16, 2012,   18,  164,   79,  589,   23,  166,  161,   24,  167,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  150,   62,  102, 1245,   16,  153,   18,  466,  142,  109,  608,\n",
-      "         1008,  361,  153,  256,  135,  362,  239, 1262,   10,   17,  239, 1263,\n",
-      "          229,  239, 1263,  857,  821, 1264, 1265, 1266, 1264, 1267,   68,  260,\n",
-      "          241, 1268,  172,  269,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   10,   12,   13,   36,   36,   13,   36,   22,   20,\n",
-      "           26,   13,  294,  295,   25,   26,   27,   28,   10,   12,   13,   36,\n",
-      "           36,   13,   36,  257,   29,   26,   13,  294,  296,   16,  295,   18,\n",
-      "           25,   26,   27,    9,   31,   28,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 528,  529,  530,  405,  531,  216,  532,  533,  194,  534,  535,  536,\n",
-      "          537,  218,   90,  538,   81,  500,  450,   27,  503,   15,   16,   17,\n",
-      "           18,   10,  116,   16,  131,   91,  539,   19,  540,   93,   15,   16,\n",
-      "           17,   18,   18,   16,   91,  125,   34,  170,   93,   91,  162,   34,\n",
-      "          541,   93,   91,  125,   34,  162,   93,   91,  170,   34,  541,   93,\n",
-      "           18,  219,  542,  533,  194,   71,  229,  543,  535,  536,  544,  537,\n",
-      "          430,  486,  102,   90,  545,  546,  547,  548,  549,  533,  194,  303,\n",
-      "          550,  533,  549,  533,  194,  303,  550,  533,  551,   90,  552,  553,\n",
-      "          553,  554,  555,  556,  543,  535,  536,  537,  542,  534,  533,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,   92,   16,   29,   18,  273,  178,\n",
-      "          279,  273,  125,  962,   23,  140,  141,  280,   13,  281,  282,  283,\n",
-      "          285,  272,  102,  173,   83,   16,   65,   18,   92,   16,   17,   18,\n",
-      "          137,   27,  287,   10,   21,  114,  288,  839,   65,   92,   16,   29,\n",
-      "           18,  963,  173,   65,   92,   16,   29,   18,  178,  480,  286,  178,\n",
-      "          842,  107,   65,   92,   16,   20,   18,  286,  178,  288,   10,  384,\n",
-      "           92,   16,   23,   18,  384,   92,   16,   23,   18,  521,  384,   92,\n",
-      "           16,   23,   18,   10,   17,  173,   65,   92,   16,   29,   18,   65,\n",
-      "           92,   16,   17,   18,  289,   68,   65,   92,   16,   20,   18,  229,\n",
-      "          125,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  366,   13,   15,   16,   17,   18,   34,   79,   15,\n",
-      "           16,   17,   18,   10,  171,   15,   16,   17,   18,   91,  171,  257,\n",
-      "           23,   93,  107,  277,  141,   62,  382,  356,  277,   65,  138,  267,\n",
-      "            9,   28, 1089,  153,  466,  464,  241,  107,  848,  177,  277,  177,\n",
-      "         1509, 1185,  277,  106,   11,   91,  116,   16,  171,   18,   16,   20,\n",
-      "           18,   26,  171,   24,   93, 2066, 2067,  848,   65,  515,   68,  142,\n",
-      "          811, 2068, 1080, 2069,  229,  277,  177,  449,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  255,  256,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          279,   18,   34,  116,   16,   79,   15,   16,   17,   18,   18,   16,\n",
-      "           20,   18,   10,   29,  139,   13, 1314,    9,  256,  258,  233,  177,\n",
-      "          278,   91,  278,  962,   23,   93,  107,  361,  256,    9,  464,  362,\n",
-      "           68,  465,  256, 1183,  172, 1567,  279,   10,   21,   36,  467,   36,\n",
-      "           10,   36, 1568,   36,  249,  229,  145,  471,   53,   17,   36,  467,\n",
-      "           36,   10,   36, 1568,   36,  249,  229,  278,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  125,  170,  162,  145,   83,   16,  151,   18,  226,    9,   28,\n",
-      "           65,  230,   15,   16,   17,   18,   83,   16,   28,   18,   10,   17,\n",
-      "          230,   83,   16,    9,   18,  230,   83,   16,   65,   18,  125,  170,\n",
-      "          229,  810,   61,   83,   16,   28,   18,   10,  201,   15,   16,   82,\n",
-      "           18,  125,   10,  228,   16,   17,   18,  229,  145,   83,   16,  151,\n",
-      "           18,   53,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  102,  114,   65,   10,  116,   16,   17,   18,   16,   20,\n",
-      "           18,   26,  155,   10,   21,   26,  154,   10,   20,   26,  521,   28,\n",
-      "           10,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  37,   38,   39,   40,   41,   42,   43,   44,   45,   46,   47,   48,\n",
-      "           49,   47,   50,   51,   52,   53,   54,   49,   47,   55,   56,   53,\n",
-      "           55,   56,   57,   58,   59,   52,   51,   60,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 182,  417,  125,  170,  377,  102,  359,  352,  107, 1809,  395,  151,\n",
-      "         1880,  155,  107,  125,  170,  352, 1890,  153,  107,  155, 2013, 2014,\n",
-      "         1062,  107,  153,  125,  985,  351,  820, 2015,  153,  170,  985,  596,\n",
-      "          820,  647,  107,  153,  125,  985,  351,  820, 2015,  153,  170,  985,\n",
-      "          351,  820,  647,  107,  153,  125,  719,  111,  703,  820,  107,  153,\n",
-      "          125,  719,  111,  351,  820, 1063, 1533, 1613, 1063, 1062, 1148,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 824,  917,  918,   29,  919,  920,  921,  920,  922,  619,  920,  923,\n",
-      "          924,  925,  920,  249,  926,  918,  924,  927,  409,  202,  920,  313,\n",
-      "          927,  918,  333,  202,  928,  929,  918,  920,  930,  918,  931,  923,\n",
-      "          924,  932,  218,  216,  919,  920,  922,  933,  934,  923,  924,  433,\n",
-      "          231,  935,  301,   13,   29,  919,  920,  922,  936,  937,  934,  923,\n",
-      "          924,  433,   79,   29,  919,  920,  918,  923,  924,  828,  938,   81,\n",
-      "          202,  131,  939,  918,  923,  924,  433,  839,  131,   10,  511,  229,\n",
-      "           79,   13,  112,  940,  941,  842,  828,  934,  923,  924,  433,  754,\n",
-      "          131,  942,  943,  900,  229,  131,  111,  944,  216,  919,  920,  939,\n",
-      "          945,  918,  511,  923,  924,  945,  918,   85,  923,  924,  423,  216,\n",
-      "          919,  920,  918,  923,  924,  828,  938,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   17,  230,   13,   34,  230,\n",
-      "           17,   13,  113,   91,   13,   93,  111,    4,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   16,   13,   36, 1760, 2138,   28,   16,   13,   36,\n",
-      "           13,    9,  760,   28,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 230,  384,   10,   16,  116,   16,   29,   18,   16,   20,   18,   18,\n",
-      "          114,   17,  125,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 180,   11,   12,  125,   92,   16,  131,   18,   24,   25,  125,   92,\n",
-      "           16,  131,   34,   17,   18,   34,   91,   19,   29,   93,   15,   16,\n",
-      "          131,   18,  125,   92,   16,  131,   18,   10,   20,  131,   19,   29,\n",
-      "          181,  182,  183,  184,   11,   12,  125,   92,   16,   29,   18,   24,\n",
-      "           25,   10,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  852,   62,  102, 1245,   16,  153,   18,  466,  142,  109,  608,\n",
-      "         1008,  361,  153,  256,  135,  362,  818, 1262,  818, 1263,  229,  818,\n",
-      "         1263,  857,  821, 1264, 1265, 1266, 1264, 1267,   68,  260,  241, 1268,\n",
-      "          815,  269,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7, 1223, 1165, 1186,  132,   11,   12,  125,   92,   16,  131,   18,\n",
-      "           24,   25,  181,  183,  483,  125,   92,   16, 1021,   18,   10,   20,\n",
-      "          125,   92,   16,   20,   18,   34,   21,  125,   92,   16,   29,   18,\n",
-      "          125,   92,   16,   20,   18,   10,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,    9,   28,   65,   66, 1284,  523,  157,  148,  960,  145,   83,\n",
-      "           16,  151,   18,   56,   53,  366,  228,   16,   20,   18,  246,   66,\n",
-      "           19,  151,  247,  168,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,   34,\n",
-      "           17,   79,   19,   30,  165,   23,  164,   13,   19,   17,   79,   34,\n",
-      "           20,  165,   23,  164,   13,   19,   30,  163,   23,  166,  161,   24,\n",
-      "          167,   33,   10,   13,   34,   79,  168,  179,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 136,  116,   16,   13,   15,   16,   17,   18,   18,   16,  125,   15,\n",
-      "           16,   17,   18,   18,   19,  116,   16,   79,   15,   16,   17,   18,\n",
-      "           18,   16,  170,   15,   16,   17,   18,   18,   10,   29,   27,   91,\n",
-      "          125,  257,   23,   26,  170,  257,   23,   93,  457,  228,   16,   20,\n",
-      "           18,  360,  178,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  116,   16,  230,   13,   34,   13,\n",
-      "           18,   16,  114,   13,   34,   13,   15,   16,   17,   18,   18,  118,\n",
-      "           19,  117,   26,  117,  119,  120,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 371,   99,  372,   83,   16,  373,   18,   92,   16,   29,   18,  137,\n",
-      "           32,   83,   16,   33,   18,  116,   16,   29,   18,   16,   83,   16,\n",
-      "           33,   18,   18,  294,   83,   16,  573,   18,   26,   83,   16,   33,\n",
-      "           18,  294,   83,   16,  573,   18,   83,   16,  373,   18,   92,   16,\n",
-      "           17,   18,  137,   32,   33,   33,   15,   16,   17,   18,  294,   83,\n",
-      "           16,  573,   18,   26,   92,   16,   83,   16,   33,   18,   18,  294,\n",
-      "           83,   16,  573,   18,   92,   16,  478,   16, 1808,   18,   18,   83,\n",
-      "           16,  373,   18,   92,   16,   20,   18,  137,   32,   83,   16,   33,\n",
-      "           18,   92,   16,   29,   18,   26,   27,   83,   16,   33,   18,   92,\n",
-      "           16,   17,   18,   83,   16,   33,   18,   92,   16,  298,   18,  294,\n",
-      "           83,   16,  256,   18,   26,   27,   83,    0],\n",
-      "        [  61,   62,  140,  141,  107,   13,  513,   65,  726,   79,   15,   16,\n",
-      "           17,   18,   10,   17,  514,   91,  373,  257,   23,   93,  515,   66,\n",
-      "          256,  362,  516,  172,  517,   65,  139,  140,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  145,  151,   53,  116,   16,  366,  228,   16,   20,   18,   18,\n",
-      "           16,   21,   18,   56,  233,  157,   62,  148,  367,   62,  158,  182,\n",
-      "          117,   26,   62,  242,  151,  358,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  764, 1224,  829, 1225,  829, 1226,  707, 1227, 1228,   81, 1229,\n",
-      "         1230, 1231, 1232, 1233,  822, 1232, 1224,  822, 1225, 1234, 1235,   90,\n",
-      "          424,   92,   16,   35,   10,   29,   18,   15,   16,  133,   18,   79,\n",
-      "           92,   16,   35,   18,   10, 1237,   26,   27,  424,   92,   16,   35,\n",
-      "           10,   29,   18,   15,   16,  133,   18,  279,   92,   16,   35,   18,\n",
-      "           79,   92,   16,   35,   18,   10, 1238,   26,   27,  228,   16,  424,\n",
-      "           92,   16,   35,   10,   29,   18,   15,   16,  133,   18,   11,   91,\n",
-      "           79,   92,   16,   35,   18,   19,  425,   16,   79,   18,   24,   93,\n",
-      "           15,   16,   17,   18,   18,   10, 1242,   26,   27,  228,   16,  133,\n",
-      "           18,  452, 1244, 1235,  527,  434,  451,   10,  116,   16,  424,   92,\n",
-      "           16,   35,   10,   29,   18,   15,   16,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,  230,   13,   19,  174,   91,\n",
-      "           29,   34,   13,   93,  584,   27,  113,   15,   16,  522,   18,   91,\n",
-      "           13,   93,  113,   91,   13,   93,  369,  241,  113,   15,   16,  522,\n",
-      "           18,   91,   13,   93,  546,   11,   91,   19,   29,   26,  116,   16,\n",
-      "          117,   18,   16,   17,   18,   24,   93, 1181, 1964,   68,  113,   91,\n",
-      "           13,   93,  380,  381,  253,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93,   10,   36,   13,   34,   29,   36,   19,\n",
-      "           36,  641,   19,   29,   36,  125,   10,   29,  249,  229,  290,  113,\n",
-      "           91,   13,   93,  962,   29,  293,   13,  294,   91,   23,   26,   29,\n",
-      "           93,  249,  290,  113,   91,   13,   93,  257,   13,  698,  229,  125,\n",
-      "          254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 513,   79,   15,   16,   17,   18,   10,   17,  514,   91,  373,  257,\n",
-      "           23,   93,  139,  255,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,   20,  373,   18,   34,  116,   16,   79,   15,   16,   17,   18,\n",
-      "           18,   16,  373,   18,   10,   29,  139,  373,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    9,   28,  255,  256,  137,  116,   16,   13,   15,   16,   17,\n",
-      "           18,   18,   16,  125,   15,   16,   17,   18,   18,   34,   79,   15,\n",
-      "           16,   17,   18,   10,   29,   27,  125,  257,   29,  258,  259,  233,\n",
-      "          260,  256,  233,  261,   16,  262,   18,  263,  261,   16,  264,   18,\n",
-      "           10,  134,  142,  107,   13,   10,  105,  265,  266,  256,  267,   65,\n",
-      "          268,  256,  267,   66,  229,  256,  178,  241,  107,  269,  270,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1704, 1705, 1706, 1707,  893, 1059,  530,  405,  216,  892,  892, 1708,\n",
-      "          181, 1050, 1708, 1709, 1710,   79, 1100, 1101, 1102,  219, 1711,  892,\n",
-      "          102, 1709, 1710, 1301, 1712,  892, 1060, 1709, 1713,  892, 1060,  229,\n",
-      "         1714,  892, 1709, 1710,  431,  725,  430,  486,  102,   90,  545,  546,\n",
-      "          547,  548,  435,  436,  450,  228,   16, 1715,   18,  452, 1716,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,   13,  174,   91,   13,   34,  228,\n",
-      "           16,  125,   34,   13,   15,   17,   18,   93, 1222,  125,  905,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 824, 1495,  190, 1496,    9,   28,  220,  397,  530,  405,   97, 1495,\n",
-      "         1495,  190, 1496, 1497,    9,  397, 1495, 1496, 1497,  942, 1101, 1103,\n",
-      "           28,  397, 1495, 1496, 1497, 1100, 1101, 1102,   28,  397, 1495, 1496,\n",
-      "         1497, 1100, 1101, 1102, 1498,   28,  397, 1495, 1496, 1497,  942, 1101,\n",
-      "         1103, 1103,  220,  397, 1496, 1497, 1459, 1499,  975,  423,  794,  610,\n",
-      "          446, 1062,  838, 1495, 1496, 1497, 1495, 1496, 1500,   58,  193,  149,\n",
-      "          194,  219,  397, 1495, 1496,  194, 1173,   71,  449,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  246,  142,  822,  151,  102,  153,  154,   17,  228,   16,   17,\n",
-      "           18,  266,  268,  608,  155,   62,  155,  466,  241,  605,  172,  242,\n",
-      "          151,  567,  464,  558,  154, 1388, 1643, 1180,   65,  242, 1644,  358,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 368,    7,   30,   15,   16,   30,   18,   22,  134,   15,   16,   21,\n",
-      "           18,   26,  729,   15,   16,   21,   18,   22,  134,   15,   16,   30,\n",
-      "           18,   61,  125,   10,  126,   92,   16,   20,   18,   20,   26,   27,\n",
-      "          170,   10,  126,   92,   16,   20,   18,   30,   26,   27,  162,   10,\n",
-      "          126,   92,   16,  729,   18,  134,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 812,   63, 1559,  155,  813,  515,   68,   62,  153,  155,   68,  256,\n",
-      "          135,  594,  269,  603,   10, 1560,   10,  116,   16,   30,   18,   16,\n",
-      "           21,   18,  564,  361,  813,  853,  952,  145, 1561,  564, 1562,  145,\n",
-      "           66,   15,   16,  522,   18,  564, 1087,  516,   15,   16,  522,   18,\n",
-      "           10,  228,   16,   96,   18,  241,   66,   15,   16,  522,   18,  952,\n",
-      "          172,  242,   63,  229,  607,   28,   19,   66,   15,   16,  522,   18,\n",
-      "            9,   19,   65,  720,  610,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 230,   85,   15,   16,   82,   18,  114,   96,   15,   16,   82,   18,\n",
-      "           19,  114, 1723,   15,   16,   82,   18,  230,   96,   15,   16,   82,\n",
-      "           18,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  135,  513,   65,   79,   15,   16,   17,   18,   10,   21,   13,\n",
-      "          139,  135,  585,  359,  352,  107, 1814, 1815,  107, 1814,   65,  515,\n",
-      "            9,   28,  362,  107, 1815,   65,  515,   66,  256,  362,   36,  153,\n",
-      "           36,   36,  560,   36,  111,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1285,  255,   65,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   34,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           27,   91,  125,  257,  170,  257,   23,   93,  258,  259,  233,    9,\n",
-      "           92,   29,   26,    9,   92,   17, 1089,    9,   92,   29,    9,   92,\n",
-      "           17,  604,  104,  107,  752,   19,  890,   34,   17,  575,   10,   23,\n",
-      "          357,   65,  457,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,   79,   10,  113,   91,   13,   93,  797,   79,   10,   17,\n",
-      "           15,   16,   13,   15,   16,   34,   18,  125,   18,  797,   79,   10,\n",
-      "           19,   13,  736,  113,   91,   19,   17,   93,   34,  113,   91,   19,\n",
-      "           21,   93,   10,   29,  125,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 212,  209, 1543, 1576, 1577,  612,  775, 1578, 1579, 1580, 1581, 1582,\n",
-      "         1578, 1541, 1583,  102, 1409, 1584, 1409,  212,  209, 1543, 1582,  209,\n",
-      "         1543, 1582, 1576,  212, 1582, 1585,  212, 1541, 1582, 1586,   91,   27,\n",
-      "           93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,  273,  178,   11,   12,  160,  161,\n",
-      "           16,  277,   18,   13,   10,   17,  114,  288,  164,   79,   10,   21,\n",
-      "          230,  288,  166,  161,   24,  167, 1392,  273,  107,  277,  273,  178,\n",
-      "           11,   12,  160,  161,   16,  277,   18,   13,   10,   29,   34,  279,\n",
-      "          114,  384,  164,   79,   10,   17,   34,  885,   16, 2137,   18,  384,\n",
-      "          166,  161,   24,  167,  279,  273,  229,   65,  277,  274,  178,  173,\n",
-      "           65, 1646,  107,  277,  877, 1089,  466,  140,  229,  277,  177,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,  151,  102,  230,   15,   16,   17,   18,    9,   19,  230,   15,\n",
-      "           16,   17,   18,   28,   19,  230,   15,   16,   17,   18,   65,   10,\n",
-      "          230,   28,  230,   65,  229,    9,  154,   10,   20,  229,  145,  151,\n",
-      "          713,  168,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   16,   28,   16,   13,   36,  859,   13,  859,    9,\n",
-      "          760,   28,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1361,  406,  190, 1912, 1913, 1914,  409,  191, 1915,  190, 1916, 1495,\n",
-      "          190,  585, 1917, 1917,  794, 1918,  934, 1919, 1917,  249, 1920, 1921,\n",
-      "          190,   67,   85,  191,  585, 1917, 1917,  872,  190,  585, 1917,   61,\n",
-      "          223, 1918,   71,  373,   91,   23,   22,  373,   22,   29,   93,  223,\n",
-      "         1918,  880, 1734,  301,   85,  223, 1879,  191, 1918,   71,  113,   91,\n",
-      "          373,   93,  229,  113,   91,  373,   93,  168,   68,  373,   92,   16,\n",
-      "           23,   18, 1922, 1915, 1923,   85,  191, 1652,  191, 1918,  102,  373,\n",
-      "           92,   16,   23,   18,  373,  610,    7,  223, 1917,  938,  202, 1924,\n",
-      "         1918, 1495, 1925, 1361,  198, 1918, 1926,  214,  202,  204,  938,   35,\n",
-      "         1927,  872,  190,  585, 1917, 1915,  190, 1917,  938,  204,  938, 1892,\n",
-      "          973,  229, 1928,  846, 1917,  938,  204,    0],\n",
-      "        [  61,  124,  125,  126,   92,   16,   20,   18,   21,   10,   17,   26,\n",
-      "           21,   15,   16,   19,  125,   18,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 127,  231,  129,  355,  125,   10,   21,  584,  170,   10,  105,  130,\n",
-      "          131,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  125,   26,  170,   36,  125,   36,   10,   30,   26,   36,\n",
-      "          170,   36,   10,  105,   26,  125,  263,  170,   10,   19,  105,  114,\n",
-      "          727,  125,   26,  125,   34,  170,  728,   10,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 173,   79, 1663, 1664,   68,  805, 1647,  579,  176,  178,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  33,   91,   29,   34,   35,   93,   10,   17,   35,   33,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  513,   83,   16,   65,   18,  137,   83,   16,   79,   18,   15,\n",
-      "           16,   17,   18,   10,   21,   83,   16,   13,   18,  139,  135,  135,\n",
-      "          177,  278,   91,  278,  257,   23,   93,  107,  277,   65,  515,    9,\n",
-      "           28,  362,   36,  153,   36,  229,  277,  178, 1645,   68,    9,   28,\n",
-      "           65,  458,  357,  104,  178,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  129,  229,  794,   20,   15,   16,  131,   18,   19,   17,   15,\n",
-      "           16,  131,   18,  257,  993,  122,  994,  131,  812,  463,  138,  995,\n",
-      "          996,  997,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 521, 1157,   15,   16,   82,   18,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  290,  291,    7,  112,  113,   91,   13,   93,   10,   36,   20,\n",
-      "           13,   34,   29,   36,   19,   17,   36,   13,   36,  292,   79,   10,\n",
-      "          113,   91,   13,   93,  120,  229,  290,  113,   91,   13,   93,  257,\n",
-      "          113,   91,   13,   34,   29,   93,  293,    3,    3,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 127,  231,  129,  130,  353,  610,  346, 1282,  355,  697,  465,  111,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1217, 1177,  459,  460,  151,  822,    9,   92,   29,   28,   92,   29,\n",
-      "           65,   92,   29, 1218,  247, 1219,  157,  153,  172,  154,  584,  153,\n",
-      "           10,  105,  584,  154,   10,  134,  584,  468,   92,   29,   10,   20,\n",
-      "         1219,  168,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 212,  209, 1942, 1943, 1944, 1945, 1946, 1947, 1948,  638, 1949,  249,\n",
-      "         1950,  635, 1944,  636, 1951,  614, 1582, 1952, 1953,  712,  300, 1954,\n",
-      "         1955, 1956, 1955, 1954,   61, 1952, 1957, 1958,   71, 1732, 1959, 1958,\n",
-      "           71,  900, 1960, 1961,  880, 1734, 1952, 1962,  635,   71,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 423,  353,   10,   29,   19,  116,   16,   29,   18,   16,   17,   18,\n",
-      "           34,  116,   16,   29,   18,   16,   20,   18,   19,  116,   16,   29,\n",
-      "           18,   16,   21,   18,   34,  721,   34,  116,   16,   29,   18,   16,\n",
-      "         1622,   18,   19,  116,   16,   29,   18,   16,  216,   18, 1623,  231,\n",
-      "          129,  995, 1159,  997,   91,   27,   93,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  13,   26,   27,   79, 1628,   86,   11,   12,  160,  161,   16,  277,\n",
-      "           18,   13,   34,   17,   79,   19,   30,  589,   23,  164,   13,   19,\n",
-      "           17,   79,   34,   20,  165,   23,  164,   13,   19,   30,  163,   23,\n",
-      "          166,  161,   24,  167,   33,   10,   13,   34,   79,  168,    4,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  173,   79,   13, 1490,   68,  579,  176,  173,   79,   10,  641,\n",
-      "           15,   16,   17,   18,   34,   91,  125,   34,   17,   93,   13,   34,\n",
-      "           29, 1491, 1492,  125,   10,  134,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  226,    9,   28,   65,  125,  170,  162,\n",
-      "            7,  125,   10,  228,   16,   30,   18,  162,   10,   17,  114,    9,\n",
-      "           10,  116,   16,   17,   18,   16,   20,   18,  170,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 136,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           27,   91,  125,  257,   23,   26,   27,  170,  257,   23,   93,  175,\n",
-      "          360,  104,   91,   13,   19,   17,   93,   15,   16,   17,   18,   34,\n",
-      "           79,   15,   16,   17,   18,   10,   21, 2117,  109,  525,   65,  457,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,  557,   63,  153,  154,   62,  153,  466,   68,  142,  154,  269,\n",
-      "         1088, 1182,  301,  239, 1485,   10,   13, 1486,  142,    9,   28,  362,\n",
-      "          358,   13,  112,  113,   91,   13,   93,   79,   10,  113,   91,   13,\n",
-      "           93,  797,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  113,   91,   13,   93, 1423,  573, 1222,   91,   23,   26,   34,\n",
-      "          887,   93,  251,  799,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  231,  129,  355,  125,  822,  130,  353,   91,   27,   93,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93, 1423,   91,   19,  887,   26,   34,  887,\n",
-      "           93, 1066,  113,   91,   29,   19,   13,   93,   10,  113,   91,   29,\n",
-      "           34,   13,   93,  113,   91,   29,   93,   10,   17,  113,   91,   29,\n",
-      "           93,   34,  113,   91,   17,   93,   34,  113,   91,   20,   93,   34,\n",
-      "          721,   34,  113,   91,  203,   93,   91,   27,   93,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    9,   28,  157,   62,  148,  362,  239,  958,   10,  201,   15,\n",
-      "           16,   82,   18,   65,  148,  265,  246,   62,  822,  151,  247,  168,\n",
-      "         1426,  157,   62,  158,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   49,   47,  142,  822,   63,  102,   55, 1007,   56,  591,   59,\n",
-      "           63,  153,   10,  154,   10,  116,   16,   29,   18,   16,   17,   18,\n",
-      "          594,  239,   83,   16, 1179,   18,   10,  239,   83,   16,  151,   18,\n",
-      "           10,  201,   15,   16,   82,   18,  241,  107,  154, 1599,  242, 1007,\n",
-      "          145, 1263,   53,  228,   16,  133,   18, 1600,   47,  142,  822,   63,\n",
-      "          247,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   11,   12,  160,  161,   16,\n",
-      "         1079,   18,   13,   34,   29,   26,  744,   13,  578,   23,  164,   17,\n",
-      "           15,   16,   13,   18,   26,  744,   13,  257,   23,  166,  161,   24,\n",
-      "          167,  113,   91,   13,   93,   34,  113,   11,   91,   13,   19,  116,\n",
-      "           16,   29,   18,   16,   17,   18,   24,   93,  257,   29,   13,  254,\n",
-      "          179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  32,  485,   16,   33,   18,   91,   29,   34,  296,   16,   35,   18,\n",
-      "           93,   10,   29,   19,  296,   16,   35,   18,   33,   10,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 738, 1439,  209,  894, 1440, 1441, 1442, 1443,  975, 1444,  409, 1441,\n",
-      "          530,  407,    9,   26,   28, 1369, 1370,  216,    9, 1418, 1441, 1445,\n",
-      "         1440, 1446,   28, 1418, 1441, 1447, 1440, 1446, 1441, 1448, 1446,  247,\n",
-      "         1449, 1450, 1451,  406, 1452,  413, 1453,  794, 1443, 1441, 1442, 1440,\n",
-      "         1454, 1444,   90, 1103,  301,   65, 1455,  209, 1440, 1443, 1442, 1454,\n",
-      "         1301, 1456, 1103,  142,   91,   65,   93,  430, 1457, 1458, 1440, 1443,\n",
-      "         1454, 1103,  102,  125,   26,  170,  610,  219,  212,  209, 1440, 1443,\n",
-      "         1454, 1459,  486,  102,   90,  545,  546,  547,  548,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   11,   12,  160,  161,   16,\n",
-      "         1079,   18,   17,   15,   16,   19,   13,   18,   26,  744,   13,  578,\n",
-      "           23,  164,   29,   26,  744,   13,  257,   23,  166,  161,   24,  167,\n",
-      "          113,   91,   13,   34,   29,   93,   22,  113,   91,   17,   13,   93,\n",
-      "           13,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   11,   12,   91,   13,   26,   79,   93,   14,\n",
-      "           13,   26,   79,  294,  465,   15,   16,  506,   18,   26,   79,  589,\n",
-      "           13,   24,   25,   28,   10,   12,   91,   13,   26,   79,   93,   14,\n",
-      "           13,   34,   79,   10,  134,   25,    9,   31,   28,  102,  484,  307,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  288,  645,  646,  647,  230,   11,   91,  288,   34,  116,   16,\n",
-      "          117,   18,   16,   21,   18,   24,   93,   10,  116,   16,   20,   18,\n",
-      "           16,   30,   18,  521,   11,   91,  288,   19,  116,   16,  117,   18,\n",
-      "           16,   21,   18,   24,   93,   10,    4,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 61,  13,  79, 159,  11,  12, 160, 161,  16, 277,  18,  17,  13,  19,\n",
-      "          79,  34,  29, 589,  23, 164,  13,  19,  17,  79,  19,  29, 578,  23,\n",
-      "         164,  13, 578,  29, 166, 161,  24, 167,  33,  10,  17,  13,  34,  20,\n",
-      "          79,  19,  30, 111, 179,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [891, 892, 893, 190,   9, 190,  28, 212, 209, 894, 895, 893, 221, 190,\n",
-      "           9, 212, 896, 897,  83,  16, 898,  18, 209, 896,  29,  83,  16, 898,\n",
-      "          18,  30, 899, 893, 221, 190,  28, 212, 896, 900,  83,  16, 898,  18,\n",
-      "         209, 896, 901,  83,  16, 898,  18,  20, 899, 893, 221, 190,   9, 832,\n",
-      "         902, 202, 893, 221, 190,  28, 832, 903, 202, 892, 437, 212, 896, 227,\n",
-      "          83,  16, 898,  18, 209, 896, 201,  83,  16, 898,  18, 339, 904, 899,\n",
-      "          86, 893, 190,   9, 190,  28, 832, 168, 905, 202,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 61, 180,  12, 125,  92, 131,  25, 125,  92,  16,  29,  18,  34,  20,\n",
-      "         125,  92,  16,  17,  18,  34, 721,  34,  91,  17, 131,  19,  29,  93,\n",
-      "         125,  92,  16, 131,  18,  10,  17, 131, 229,  12, 125,  92, 131,  25,\n",
-      "         526, 527, 229, 180,  12, 116,  16, 125,  92, 131,  18,  16,  17, 131,\n",
-      "          34,  29,  18,  25, 181, 131, 183,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 61, 136,  65, 137, 116,  16,  13,  15,  16,  17,  18,  18,  16, 125,\n",
-      "          15,  16,  17,  18,  18,  19, 116,  16,  79,  15,  16,  17,  18,  18,\n",
-      "          16, 170,  15,  16,  17,  18,  18,  10,  29,  91, 125, 257,  23,  26,\n",
-      "         170, 257,  23,  93, 258, 259, 139, 135,  92,  16,  29,  18,  26, 135,\n",
-      "          92,  16,  17,  18, 457, 228,  16,  30,  18, 142,  65, 238, 135,  92,\n",
-      "          16,  29,  18, 142, 172, 135,  92,  16,  17,  18, 142, 145, 146,  92,\n",
-      "          16,  29,  18, 135,  92,  16,  17,  18,  53, 125,  10,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,   99,  882,  102,    9,  584,   28,  882,  138,  233,  464,  584,\n",
-      "          465,  584,  568,  558,  466,   99,  882,  102,  107,  153,  242,  992,\n",
-      "          382,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 384,  645,  646,  647,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  173,   79,   10, 1112,   15,   16,   13,   18,   34,   13,  174,\n",
-      "           13,   68, 1112,  579,  176,  178,   79,   10,   17,   13,   34,  170,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 513,   65,  233,  234, 1775,   65,    9,   28,  362,  361,   65,  458,\n",
-      "           66,  256,  362,    7,   36,  153,   36,   10,   21,  228,   16,   17,\n",
-      "           18,   26,   27,   36,  560,   36,   10,   17,  228,   16,   30,   18,\n",
-      "           65,  139,  458,  358,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   91,   13,   19,   17,   93,\n",
-      "          248,   15,   16,   13,   18,   34,  125,   91,   13,   19,   29,   93,\n",
-      "           15,   16,   17,   18,  839,  250,  113,   91,   13,   93,  251,  252,\n",
-      "          842,  113,   91,   13,   93,  138,  253,  229,  125,  254,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  513,   65,   79,   15,   16,   17,   18,   10,   20,   13,  139,\n",
-      "          135,  177,  116,   16,   20,   18,   16,   17,   18,  107,  277,   65,\n",
-      "          267,    9,   28,   13,  456,  267,  142,   36, 1162,   36,   34,   36,\n",
-      "          562,   36,   10,   21,  229,  277,  178,  261,   16, 1963,   18,   10,\n",
-      "           20,  261,   16,  268,   18,  229,   36,  153,   36,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  107,   79,   10,   13,   34,   17,  125,  104,   65,  137,   13,\n",
-      "           15,   16,   17,   18,   34,   79,   15,   16,   17,   18,   19,   17,\n",
-      "          890,   19,   17,   10,   23,  374,    9,   26,   28,  362,   36,  153,\n",
-      "           36,   10,   17,  228,   16,   20,   18,  104,   65,   53,    4,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 123,  694,  695,  696,  102,  694,  125,   92,   16,   29,   18,  125,\n",
-      "           92,   16,   17,   18,   94,  125,   92,   16,  131,   18,   94,  125,\n",
-      "           92,   16,   29,   18,  294,   12,   23,   26,   29,   25,   91,   35,\n",
-      "           10,   29,   26,   17,   26,   94,   93,  697,  171,  125,   92,   16,\n",
-      "           35,   34,  171,   18,   10,  125,   92,   16,   35,   18,   91,   35,\n",
-      "           10,   29,   26,   17,   26,   94,   93,  698,  303,  123,  180,  699,\n",
-      "          125,   92,   16,   35,   34,  171,   18,   10,  125,   92,   16,   35,\n",
-      "           18,   91,   35,   10,   29,   26,   17,   26,   94,   93,  122,  697,\n",
-      "          171,  694,  123,  123,  171,  694,  125,   92,   16,   29,   18,  125,\n",
-      "           92,   16,   17,   18,   94,  125,   92,   16,  131,   18,   94,   26,\n",
-      "           65,   91,  278,   93,   10,  116,   16,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 274,  275,  276,  102,  104,   65,  178,   91,   13,   34,  105,   93,\n",
-      "           15,   16,   17,   18,   34,   79,   15,   16,   17,   18,   10,  214,\n",
-      "          140,  141,  280,   13,  281,  282,  283,  284,  285,  272,  229,   65,\n",
-      "          286,  178,  107,  277,  273,  178,   11,   12,  160,  161,   16,  277,\n",
-      "           18,   13,   10,  279,  114,  384,  164,   79,   10,  279,  230,  384,\n",
-      "          166,  161,   24,  167,  279,  273,  277,   65, 1573,    9,   28,  362,\n",
-      "           36,  153,   36,   10,  228,   16,   96,   18,  229,  277,  177,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 136,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           91,  125,  257,   23,   26,  170,  257,   23,   93,  175,  360, 1160,\n",
-      "         1161,   15,   16,   82,   18,   65,  457,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301,   83,   16,  353,   18,   92,   16,  131,   18,  370,   11,   12,\n",
-      "          125,   92,   16,  131,   18,   24,   25,  181,  131,  183,   20,   83,\n",
-      "           16,  353,   18,   92,   16,   20,   18,   10,   83,   16,  353,   18,\n",
-      "           92,   16,   17,   18,   34,   83,   16,  353,   18,   92,   16,   21,\n",
-      "           18,  125,   92,   16,   29,   18,   10,   17,  125,   92,   16,   30,\n",
-      "           18,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  261,   16,  153,   18,   10,   91,   17,   26,   20,   93,  261,\n",
-      "           16,  155,   18,   10,   91,   20,   26,  279,   93,  261,   16,  153,\n",
-      "           18,  263,  261,   16,  155,   18,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 764,   40,  766,  767, 1478, 2094, 2095, 2096, 2097, 2098, 2099, 2100,\n",
-      "         2101, 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2109, 2110, 2111, 2112,\n",
-      "         2113, 1397, 2114,  102,  674, 2115,  674, 2115, 2043, 2098, 2116,  682,\n",
-      "         2109,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1177, 1178,   63,   19,    9,   92,   16,   29,   18,   28,   92,\n",
-      "           16,   29,   18,   65,   92,   16,   29,   18,   66,   92,   16,   29,\n",
-      "           18,   59,  812,  468,   92,   16,   29,   18,   10,   21,   26,   27,\n",
-      "          153,   10,   17,   26,   27,  239, 1179,   10,  351,   15,   16,   82,\n",
-      "           18,   26,   27,  256,   26,   27,  464,   26,   27,  465,  154,   26,\n",
-      "           27,  462,   92,   16,   29,   18,   26,   27,    9,   92,   16,   29,\n",
-      "           18,   66,  466,  241,  470,  469,  469,  242,   65,   92,   16,   29,\n",
-      "           18,  560, 1180,   65,  242,   65,   92,   16,  502,   18,  560,  358,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 107,  277,  173,   79,   10,  228,   16,   13,   18,  104,   13,   15,\n",
-      "           16,   17,   18,   34,   79,   15,   16,   17,   18,   10,  116,   16,\n",
-      "           29,   18,   16,   30,   18,  357,  277,  178,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   33,   10,  116,   16,   29,   19,   35,   18,   16,   29,   34,\n",
-      "           35,   18,   34,   17,   35,   36,   33,   36,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  353,   92,   16,  131,   18,  370,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,  125,   92,   16,   29,   18,\n",
-      "           10,   19,   17,   26,   27,  125,   92,   16,   17,   18,   34,  125,\n",
-      "           92,   16,  105,   18,   10,   17,   26,  353,   92,   16,   96,   18,\n",
-      "           10,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   79,  159,  160, 1740,   13,   19,   29,  589,   23, 1741,   19,\n",
-      "           79,  578,   23, 1741,   34,   79,   19,   21,  578,   23,  166, 1740,\n",
-      "          116,   16,   79,   18,   16,   13,   18,  168,  905,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    9,  584,   28,  255,  162,  137,  116,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   16,   20,   18,   34,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  171,   18,   10,   29,  998,  138,  690,   65,\n",
-      "           68,  464,  239,   83,   16,  999,   18,   10,  819,   15,   16,   82,\n",
-      "           18,  171,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  104,   65,  178,   91,   13,   34,  105,   93,\n",
-      "           15,   16,   17,   18,   34,   79,   15,   16,   17,   18,   10,  214,\n",
-      "          140,  141,  280,   13,  281,  282,  283,  284,  285,  272,  229,   65,\n",
-      "          286,  178,  107,  277,  273,  178,   11,   12,  160,  161,   16,  277,\n",
-      "           18,   13,   10,  885,   16,  279, 1513,   18,  384,  164,   79,   10,\n",
-      "          885,   16,  279,  886,   18,  384,  166,  161,   91,  279,  478,   16,\n",
-      "          479,   18,   93,   24,  167,  277,   65, 1573,    9,   28,  362,   36,\n",
-      "          153,   36,  228,   16,   96,   18,  229,  277,  177,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   11,   91,   17,   34,   13,\n",
-      "           34,  641,   15,   16,   17,   18,   24,   93,  174,   91,   29,   34,\n",
-      "           13,   93,   19,   17,   13,  125,   10,   23,   26,  241,   19,   29,\n",
-      "           22,   13,   22,   23,  249,   26,  113,   91,   13,   93,   22,   23,\n",
-      "         1808,   13,  257,   23,  249,  113,   91,   13,   93,  257,   23,   13,\n",
-      "          113,   13, 1964,   68,  229,  125,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   32,   33,   91,   29,   34,   35,   93,   27,   33,   10,   17,\n",
-      "           35,   36,   33,   36,   10,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 242,  811,   63,  102,  239,    9,   10,  239,   28,   10,  239,   65,\n",
-      "           10, 1742,   15,   16,   82,   18,  154,   10,   17,  153,  254, 1739,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   13,   36,   13,   36,  822,   36,   13,  822,  125,\n",
-      "           36,  125,  125,  249,  229,  290,  113,   13,  293,  113,   13,  797,\n",
-      "           13,  456,  858,   56,   53,  754,  229,  125,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,  151,  102,  114,   65,   10,  116,   16,   17,   18,   16,   20,\n",
-      "           18,   26,  155,   10,   21,   26,  154,   10,   20,  114,   28,   10,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  11,   91,   13,   15,   16,   17,   18,   34,  116,   16,   17,   18,\n",
-      "           16,   13,   18,   24,   93,   15,   16,   30,   18,  582,  102,  296,\n",
-      "           16,   13,   18,   15,   16,   21,   18,  583,    4,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  135,  136,   65,  137,  116,   16,   13,   15,   16,   17,   18,\n",
-      "           18,   16,   21,   18,   19,  116,   16,   79,   15,   16,   17,   18,\n",
-      "           18,   16,   30,   18,   10,   29,  139,   68,  142,   65,   62,  140,\n",
-      "          141,   36,  144,   36,   10,   36, 1416,   36,  145, 1417,   53,    4,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   10,   12,   29,   26,   17,   26,   21,   25,   26,\n",
-      "           28,   10,   11,   12,   13,   36,   13,   15,   16,   17,   18,   19,\n",
-      "           21,   13,   34,  171,   10,   23,   24,   25,    9,   31,   28,   10,\n",
-      "           12,   29,   25,   28,   10,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  7, 169, 889,  16, 125,  18,  26, 889,  16, 170,  18,  36, 889,  16,\n",
-      "         125,  18,  36,  10,  29, 889,  16, 125,  18, 263, 889,  16, 170,  18,\n",
-      "          10,  19,  29, 889,  16, 125,  18, 263,  91,  17, 889,  16, 125,  18,\n",
-      "          19, 889,  16, 170,  18,  93,  10,  91,  27,  93,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [824, 825, 826, 406, 190, 827, 828, 829, 827,  13,  81, 830, 829, 831,\n",
-      "          79,  81, 279, 829, 832,  33,  81, 830, 833, 834, 829, 829, 827,  13,\n",
-      "          92,  35, 829, 831,  79,  92,  35, 990,  35,  10,  29, 584,  17, 584,\n",
-      "         837, 584, 134, 991,  90, 585, 508,  95, 217, 322, 610,  95, 554,  79,\n",
-      "          10, 125,  34, 752,  79,  10, 162,  34, 541, 228,  16,  13,  18, 103,\n",
-      "         829, 831,  79, 829, 827,  13, 100, 101, 446, 554, 838, 449, 839, 554,\n",
-      "         840,  90, 284,  79,  13, 100,   7, 190, 829, 832,  33,  13,  79,  84,\n",
-      "          33,  10, 841,  79,  19,  13, 842, 843,  35, 829, 827,  13,  10, 844,\n",
-      "         249, 829, 831, 829, 832, 845, 610, 846, 829, 827,  13, 847, 829, 832,\n",
-      "         845,   0],\n",
-      "        [107, 277, 255, 233, 139, 255,  64, 277, 358, 875, 116,  16,  29,  18,\n",
-      "          16,  21,  18, 255, 457,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [107,  79,  13, 104,  13,  15,  16,  17,  18,  34,  79,  15,  16,  17,\n",
-      "          18,  34,  17,  79,  19,  20,  10,  23, 361,   9,  26,  27,  28, 362,\n",
-      "          36, 153,  36,  10, 179,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,   83,   16,  151,   18,  226,    9,  584,   28,  584,   65,  125,\n",
-      "          584,  170,  584,  162,  584,    7,  230,   28,   34,  230,    9,   91,\n",
-      "          230,   65,   19,  114,   65,   93,   10,   23,  125,   10,   17,  162,\n",
-      "           10,  228,   16,   17,   18,   65,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 528, 1361, 1427, 1428, 1429,   20,   66, 1430,  696, 1431,  489,  231,\n",
-      "          489,  750,   63,   19,    9,   92,   16,   29,   18,  154,   92,   16,\n",
-      "           29,   18,   66,   92,   16,   29,   18, 1432,   49,   47,   62,   19,\n",
-      "         1433,  877,  519,   62,  750,   64,  256,   26,  135,   26,  260,   26,\n",
-      "          952,  558,  466,  153,   10,  154,   10,  105,   83,   16, 1019,   18,\n",
-      "           26,  468,   92,   16,   29,   18,   10,   21,   83,   16, 1019,   18,\n",
-      "           20,   66, 1430, 1434,  205, 1435, 1436,  477,  469, 1019,   15,   16,\n",
-      "           20,   18, 1430, 1437, 1431,  489,  828,  205, 1438,    4,  477,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  214,   18,   34,  116,   16,   79,   15,   16,   17,   18,   18,\n",
-      "           16,  171,   15,   16,   17,   18,   18,   10,   29,   91,   23,   22,\n",
-      "          171,   22,   30,   93,  457,  116,   16,  228,   16,  483,   18,   18,\n",
-      "           16,   21,   18,   26,    9,   26,   28,   65,  233,  229,   65,  178,\n",
-      "          567,  142,   65,   68,  568,  107,   13,   10,  105,   36,  569,   36,\n",
-      "           10,   36,  570,   36,   26,  569,  172,  570,  229,  145,  571,   53,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  169,  125,   10,   91,   29,   26,   19,   29,   93,   26,   27,\n",
-      "          170,   10,   91,  171,   34,   29,   26,   17,  171,   19,   21,   93,\n",
-      "          125,  172,  170,  171,   10,    4,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  33,   10,   29,   34,   17,  116,   16,   21,   35,   18,   16,   33,\n",
-      "           15,   16, 1999,   18,  425,   16,   33,   18,   19,   29,   18,   10,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  885,   16,  125,  114,   18,\n",
-      "           17,   13,   34,   91,  125,   19,   29,   93,   91,  114,   13,   34,\n",
-      "           29,   93,  125,  301,   36,  113,   91,   13,   93,   36,  168,    9,\n",
-      "          229,  113,   15,   16,  522,   18,   91,   13,   93,  229,    9,  241,\n",
-      "           36,  113,   15,   16,  522,   18,   91,   13,   93,   36,  578,   17,\n",
-      "            9,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,   83,   16,  151,   18,  102,  594,  154, 1067, 1068,  256,  594,\n",
-      "          466,  261,   16,   83,   16,  472,   18,   18,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  125,   10,  126,   92,   16,  841,   18,  901,   26,   27,  170,\n",
-      "           10,  126,   92,   16,   17,   18,  901,   26,   27,    4,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  136,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  125,   15,   16,   17,   18,   18,   19,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,\n",
-      "           29,   91,  125,  257,   23,   26,  170,  257,   23,   93,  175,  360,\n",
-      "           79,   10,  228,   16,   17,   18,   13,   65,  457,    4,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,  643,   10,   12,   29,   26,   17,   26,   20,   26,   21,\n",
-      "           26,   30,   26,  105,   26,  133,   25,   26,   27,    9,   10,   12,\n",
-      "           17,   26,   20,   26,   21,   26,   30,   25,   26,   27,   28,   10,\n",
-      "           12,   17,   26,   20,   26,  105,   26,  133,   25,   28,   31,   83,\n",
-      "           16,   65,   18,   92,   16,  643,   18,    9,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 309,  310,  311,  312,  313,  314,  315,  316,  317,  318,  319,  320,\n",
-      "          321,  320,  322,  323,  324,  325,  320,  326,  327,  328,  329,  330,\n",
-      "          321,  331,    7,  314,  332,  326,  333,  319,  320,  334,  335,  336,\n",
-      "          337,  338,  320,  339,  340,  319,   71,  341,  328,  342,  203,  319,\n",
-      "          320,  321,  337,  343,  320,  344,  320,  321,  345,  346,  347,  348,\n",
-      "          328,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1124, 1884, 1885, 1886,   76, 1887, 1888,  149, 1889,  149, 1889,\n",
-      "          604,  395,  151, 1890,  154, 1880,  153,  155,  145,   83,   16,  151,\n",
-      "           18, 1891,  858, 1419, 1892,  502,  983,  301,  842, 1893,  301,  979,\n",
-      "          102,  530,  987,  238,  988,  989,  839,  842,   71,  301,  373,   92,\n",
-      "           16,   29,   18,  373,   92,   16,   17,   18,  373,   92,   16,   20,\n",
-      "           18,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[127, 798, 129, 355, 279, 436, 130, 131,   3,   3,   3,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 13,  79, 159,  11,  12, 160, 161,  16, 277,  18,  13,  19,  79,  34,\n",
-      "          29, 165,  23, 164,  13,  19,  17,  79, 163,  23, 164,  13,  34,  17,\n",
-      "          79,  19,  17, 163,  23, 166, 161,  24, 167,  33,  13,  79, 168, 179,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 13,  26,  79, 159,  11,  12, 160, 161,  16, 277,  18,  13,  34,  79,\n",
-      "         165,  23, 164,  17,  13,  19,  79, 165,  23, 164,  13, 163,  29, 166,\n",
-      "         161,  24, 167,  33,  10,  20,  13,  34,  21,  79, 168,   4,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [127, 129, 355,  13,  79, 131, 130,  13,  79, 610,   3,   3,   3,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,  248,   15,   16,   13,   18,\n",
-      "           19,  125,   91,   13,   34,   17,   93,  125,   10,   29,  249,  250,\n",
-      "          113,   91,   13,   93,  251,  252,  113,   91,   13,   93,  138,  253,\n",
-      "          229,  125,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   12,   13,   36,   13,   19,   29,  589,   23,\n",
-      "           25,   26,   27,   28,   10,   12,   23,   26,   27,   29,   26,   27,\n",
-      "           17,   25,   26,   27,    9,   31,   28,   10,   91,   27,   93,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,  230,   13,   19,  228,   16,   20,   18,  114,   13,\n",
-      "          797,  112,   79,   10,  230,   13,   34,  228,   16,   20,   18,  114,\n",
-      "           13,  797,  348,  259,  876,    4,   81,  110,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  370,  164,   16,  181,  183, 1763,  125, 1764,  125,   92,   16,\n",
-      "          216,   18,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  521,   11,   91,  384,   19,  116,   16,   30,  117,   18,   16,\n",
-      "           21,   18,   24,   93,   10,  116,   16,   29,   18,   16,   30,   18,\n",
-      "           26,  521,  384,   10,    4,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93, 1222,   13,  859,   23,  249,  113,   91,\n",
-      "           13,   93,   10,  248,   15,   16,   19,   13,   19,   29,   18,   19,\n",
-      "           13,  173,   79,   10,  113,   91,   13,   93,   68,  579,  176,  178,\n",
-      "          179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 750,   83,   16,   63,   18,   19,   83,   16,    9,   18,   92,   16,\n",
-      "           29,   18,   83,   16,   28,   18,   92,   16,   29,   18,   83,   16,\n",
-      "           65,   18,   92,   16,   29,   18,   83,   16,   66,   18,   92,   16,\n",
-      "           29,   18,  102,  153,   10,  154,   10,   17,  155,   92,   16,   29,\n",
-      "           18,  242,   83,   16,  462,   18,   92,   16,   29,   18,   83,   16,\n",
-      "           65,   18,   92,   16,   29,   18,   83,   16,   65,   18, 1074, 1075,\n",
-      "          596,   15,   16,   82,   18,  750,  247,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   65,   92,   16,   29,   18,   26,   65,   92,   16,   17,   18,\n",
-      "          273,  178,   65,   92,   16,   29,   18,  137,   11,   12,  160,  161,\n",
-      "           16,  277,   18,   13,   10,   21,  114,   15,   16,   17,   18,  288,\n",
-      "          164,   79,   10,   21,  230,   15,   16,   17,   18,  288,  166,  161,\n",
-      "           26,   91,  288,  478,   16,  479,   18,   93,   26,   65,   92,   16,\n",
-      "           17,   18,  137,   11,   12,  160,  161,   16,  277,   18,   13,   10,\n",
-      "          279,   34,  116,   16,   29,   18,   16,  279,   18,  164,   79,   10,\n",
-      "          279,   19,  116,   16,   29,   18,   16,  279,   18,  166,  161,   26,\n",
-      "           91,  279,  478,   16,  479,   18,   93,   24,  167,   24,  167,   65,\n",
-      "           92,   16,   29,   18,   26,   27,   65,   92,   16,   17,   18,  273,\n",
-      "          178,  480,  178,  140,  141,  280,   13,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  513,   65,   79,   15,   16,   17,   18,   10,   17,   13,   26,\n",
-      "          106,  107,  277,  361,   65,    9,   28,  362,  104,  464, 1089,  153,\n",
-      "          604,  104,  241,  140,  141,   62,  104,  464, 1801,  464,  106,  142,\n",
-      "          229,  107,  277,  104,  464,  178,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1213, 1214,   52,   51, 1215, 1216,  292,  688,  520,  688,  158,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 976,  977,  978,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301, 1424,  370,   11,   12,  125,   92,   16,  131,   18,   24,   25,\n",
-      "          181,  131,  183,  125,   92,   16,   20,   18,   10,   30,   26,  125,\n",
-      "           92,   16,  133,   18,   10,  729,  353,   92,   16,   96,   18,   10,\n",
-      "         1425,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    9,  584,   28,  584,   65,  147,   62,  148,  149,   68,   27,\n",
-      "          150,   62,   92,   16,   29,   18,  363,  151,  152,  150,   62,   92,\n",
-      "           16,   29,   18,   53,   21,  117,  153,   10,  154,   10,  155,   10,\n",
-      "          156,   92,   16,   29,   18,   27,  157,   62,  158,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    9,   28,  136,  256,  258,  259,  233,   68,  464,  256,  145,\n",
-      "           83,   16, 1110,   18,  957,  669, 2038,  819,  820,  256,  457,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   66,  145,  151,  242,  238, 1735,   16, 1736,   18,   16,  154,\n",
-      "           18,   10,   20, 1735,   16, 1736,   18,   16,  269,   18,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 370,   12,   11,  167,  125,   92,   16,  131,   18,   24,   25, 2008,\n",
-      "           29,   26,   27,  795,  125,   92,   16,   17,   18,   26,   27,  125,\n",
-      "           92,   16,   20,   18,   26,   27,  125,   92,   16,  105,   18,  985,\n",
-      "          132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  181,  183,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 980, 1682, 1683, 1684, 1685, 1683, 1684,  548, 1685,   44, 1686,  750,\n",
-      "          882, 1687, 1688, 1125, 1689, 1690, 1691, 1685,   44, 1383, 1692,  121,\n",
-      "         1383, 1692,  894,  894, 1693,  858,  688, 1383, 1692, 1694,  766,  736,\n",
-      "         1695,  121, 1696, 1697, 1383, 1692,  233, 1284,  882, 1069,  882, 1698,\n",
-      "         1383, 1692,  682, 1699, 1700, 1701, 2185,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,   19,   13,   15,   16,   21,   18,   34,   13,   15,\n",
-      "           16,   17,   18,   34,   17,  797,    4,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   11,   91,   29,   19,   13,\n",
-      "           15,   16,   17,   18,   24,   93,  248,   15,   16,   13,   18,  250,\n",
-      "          113,   91,   13,   93,  251,  252,   13,  589,   23,  249,  113,   91,\n",
-      "           13,   93,  578,  641,   34,   29,  229,  125,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 125,  861,  116,   16,   17,   34, 1471,   18,   16,   29,   34,   35,\n",
-      "           18,   10,   20,   34,   35,   26,   27,  125,   10,   91,   27,   93,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 891,  892,  893,  190,    9,  190,   28,  212,  209,  894,  895,  893,\n",
-      "          221,  190,    9,  212,  896,  897,  898,  209,  896, 1786,  899,  893,\n",
-      "          221,  190,   28,  212,  896,  900,  898,  209,  896,  901,  898,  899,\n",
-      "          893,  221,  190,    9,  832,  902,  202,  893,  221,  190,   28,  832,\n",
-      "          903,  202,  892,  437,  212,  896, 1787,  209,  896, 1788,  339,  904,\n",
-      "          899,   86,  893,  190,    9,  190,   28,  832,  168,  179,  202,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   30,   19,   36,   13,   34,\n",
-      "          125,   36,   19,   36,   13,   19,   17,   36,  125,   10,   29,  249,\n",
-      "          229,  290,  113,   91,   13,   93,  589,   23,  293,  113,   91,   13,\n",
-      "           93,  578,   29,  229,  125,  254,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 242,  274,  275,  276,  102,  150,   62,  273,  178,   11,   12,  160,\n",
-      "          161,   16,  277,   18,   83,   16,   13,   18,   10,  114,  288,  164,\n",
-      "           79,   10,  230,  288,  166,  161,   26,   91,  288,  478,   16,  479,\n",
-      "           18,   93,   26,  478,   16,  106,   18,   91,   23,   26,   24,  167,\n",
-      "           19,  228,   17, 1160,  384,  107,  277,  150,   62,  361,    9,   28,\n",
-      "          362,  229, 1393,  254,  229,  153,  466,  142,  512,  273,  178,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  128,  129,  355,  278,   10,   23,   26,   27,  125,   10,   23,\n",
-      "           26,  130,  278,    3,    3,    3,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[2009, 1285,  255,   65,  116,   16,   13,   15,   16,   17,   18,   18,\n",
-      "           16,  125,   15,   16,   17,   18,   18,   34,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,\n",
-      "           29,   27,   91,  125,  257,  170,  257,   23,   93,  258,  259,  233,\n",
-      "            9,   92,   16,   29,   18,   26,   27,    9,   92,   16,   17,   18,\n",
-      "           26,   27, 1089,    9,   92,   16,   29,   18,   83,   16,    9,   18,\n",
-      "           92,   16,   17,   18,  604,  104,  107,   83,   16,  752,   18,   19,\n",
-      "           83,   16,  890,   18,   34,   17,   83,   16,  575,   18,   10,   23,\n",
-      "          357,   83,   16,   65,   18,  457,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  226,    9,   26,   27,   28,   26,   27,   65,  125,   26,\n",
-      "          170,   26,  162,    7,   28,   10,  227,   15,   16,   82,   18,  125,\n",
-      "           10,  228,   16,   20,   18,  162,   26,   27,  170,   10,   17,  228,\n",
-      "           16,  133,   18,   26,   27,  229,  145,  151,   53,  230,    9,   34,\n",
-      "          228,   16,   20,   18,  230,   65,   10,  116,   16,  228,   16,   17,\n",
-      "           18,   18,   16,   17,   18,   26,   27,  229,   65,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  91,   13,   15,   17,   34,   13,   34,   79,   93,   15,   30,  582,\n",
-      "          102,   13,   15,   30,   79,   15,   17,  583,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1188, 1189, 1190, 1191, 1192, 1059, 1193, 1050,  102, 1194,  544, 1192,\n",
-      "          544, 1195, 1196,  121,  593,    9,   68, 1197,  544, 1192,  510,  483,\n",
-      "           28,   68, 1198,  544, 1195,  510, 1199, 1063,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  169,  261,   16, 1187,   18,   10,   11,   91,  116,   16,   29,\n",
-      "           18,   16,   17,   18,   26,  116,   16,  228,   16,   20,   18,   18,\n",
-      "           16,   17,   18,   24,   93,  261,   16,   83,   16,  154,   18,   18,\n",
-      "           10,   11,   91,  116,   16,  228,   16,   20,   18,   18,   16,   17,\n",
-      "           18,   26,  116,   16,   29,   18,   16,   17,   18,   24,   93,  239,\n",
-      "           83,   16,  151,   18,   10,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 116,   16,   20,   34,   35,   18,   16,   29,   34,   35,   18,   10,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 173,   79,   10,  174,   13,   34,   13,   34,   29,  175,  176,  177,\n",
-      "          176,  178,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,   19,\n",
-      "           17,   79,   19,   17,  578,   23,  164,   13,   19,   79,   34,   29,\n",
-      "          589,   23,  164,   79,  163,   23,  166,  161,   24,  167,   33,  807,\n",
-      "         1840,  168,  179,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    9,  255,  256,  137,  116,   16,   13,   15,   16,   17,   18,\n",
-      "           18,   16,   21,   18,   34,  116,   16,   79,   15,   16,   17,   18,\n",
-      "           18,   16,   20,   18,   10,   29,  258,  233,  177,  278,  278,  107,\n",
-      "          361,  256,    9,  464,  362,   68,  465,  256,   83,   16, 1183,   18,\n",
-      "          172,   83,   16, 1567,   18,   83,   16,  467,   18,   36,   10,   36,\n",
-      "           83,   16, 1568,   18,  249,  229,  363,  471,   53,   36,  467,   36,\n",
-      "           36, 1568,   36,  249,  241,  228,   16,   20,   18,   22,   83,   16,\n",
-      "          278,   18,   22,   17,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 173,   79,   10,   91,  641,   34,   29,   93,  248,   15,   16,   13,\n",
-      "           18,   68,  579,  176,  177,  125,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 314,  917, 1194, 1286,  447, 1287, 1288, 1289, 1290, 1291,  202, 1292,\n",
-      "         1291,  202, 1094, 1293, 1287, 1294, 1291,  202, 1295,  534, 1296, 1297,\n",
-      "         1298, 1299, 1300,  534, 1192,   81, 1192, 1301,  214, 1300,  333, 1302,\n",
-      "         1192, 1274,  546,   85,  214, 1300, 1303, 1302, 1192, 1301,   85, 1300,\n",
-      "          409, 1302, 1304, 1286,  917,  217,  181,  922, 1304, 1305, 1192,   90,\n",
-      "         1100, 1101, 1102, 1192, 1274,  546,  942,  219, 1192, 1274,  546,   71,\n",
-      "          229, 1304, 1287, 1300,  339, 1303, 1302,   71,   61, 1304, 1298, 1287,\n",
-      "          832, 1306,   81,  202, 1304, 1287, 1288, 1307, 1308, 1269, 1306,  610,\n",
-      "          219, 1306,  754, 1309,   71,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  750,   63,   19,    9,   92,   16,   29,   18,   28,   26,   65,\n",
-      "           92,   16,   29,   18,   66,  102,   68,  256,  135,  558,  559,   92,\n",
-      "           16,   29,   18,   26,   27,  462,   92,   16,   29,   18,   17,  560,\n",
-      "           10,  561,   92,   16,   29,   18,  562,   10,   17,  563,  241,   68,\n",
-      "           65,   92,   16,   29,   18,  242,  565,  751,  153,   10,   17,   26,\n",
-      "           27,  594,   10,   29,   26,   27,  468,   92,   16,   29,   18,   10,\n",
-      "           20,  229,  607,    9,   19,  564,   19,    9,   92,   16,   29,   18,\n",
-      "          720,  610,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   17,  230,   13,   19,   13,\n",
-      "          114,   13,   19,   13,   26,  113,   15,   16,  522,   18,   91,   13,\n",
-      "           93,  113,   91,   13,   93,  369,  241,  113,   15,   16,  522,   18,\n",
-      "           91,   13,   93,  546,   91,   23,   26,  117,   93, 1181,  253,   13,\n",
-      "          294,  118,   23,   26,  117,  119,  249,  113,   91,   13,   93,  165,\n",
-      "          641,  229,  125,  254,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61, 1393, 1662,  138,  242, 1393, 1662, 1515,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 488,  489,  490,  491,  492,  493,  494,  495,   90,  284,  397,  309,\n",
-      "          310,  496,  497,  498,  433,  499,   91,  279,   93,  279,   81,  500,\n",
-      "          488,  489,  501,  502,   91,  279,   93,   10,  116,   16,  503,   18,\n",
-      "           16,   29,   34,  248,   15,   16,   19,  504,   91,  279,   19,  505,\n",
-      "           93,   18,   18,  503,  497,  498,  433,  502,   11,   91,  279,   15,\n",
-      "           16,  506,   18,   24,   93,   10,  347,  503,  507,  508,  509,  311,\n",
-      "          279,   15,   16,  506,   18,  510,  368,  174,  511,  452,   20,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   36,   17,   13,   34,   29,\n",
-      "           36,   34,   36,   13,   19,   29,   36,  292,   79,  113,   13,  797,\n",
-      "           83,   16,   13,   18,  294,  118,   23,   26,   34,  887,   93,  249,\n",
-      "          113,   91,   83,   16,   13,   18,   93,  578,   83,   16,  641,   18,\n",
-      "           34,   83,   16,  170,   18,   26,   27,  229,   83,   16,  125,   18,\n",
-      "           34,   83,   16,  170,   18,  111,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 33,  10,  21,  34,  20,  35, 116,  16, 425,  16,  33,  18,  18,  16,\n",
-      "          36,  33,  36,  18,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [231, 811,  63, 812, 260, 155, 813, 267, 814, 815, 242,  63, 241, 242,\n",
-      "         816, 815, 242, 817, 818, 151, 819, 820, 603, 815, 821, 246, 256, 822,\n",
-      "         823, 247, 116,  16, 228,  16, 105,  18,  18,  16,  20,  18, 429, 246,\n",
-      "         245,  53,   3,   3,   3,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [173,  79,  10,  20,  11,  91,  13,  15,  16,  17,  18,  34,  13,  24,\n",
-      "          93, 248,  15,  16,  13,  18,  68, 179, 579, 176, 178,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [697, 395, 375,  51, 303, 307, 486, 761, 762,  67, 433, 307, 486, 761,\n",
-      "         762,  71,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   11,   36,   13,   19,  116,\n",
-      "           16,   29,   18,   16,   17,   18,   24,   36,   34,   11,   36,   13,\n",
-      "           34,  116,   16,   29,   18,   16,   17,   18,   24,   36,  464,  290,\n",
-      "          113,   91,   13,   93, 1574,   17,  293,  229,  464,  241,  125,   26,\n",
-      "          170,  294,  464,  249,   36,  125,   34,  170,   36,   22,   36,   29,\n",
-      "           34,  575,   36,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  33,   91,   29,   34,   35,   93,   10,   17,   35,   33,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  140,  141,  280,   13,  456,  580,  282,  283,\n",
-      "          284,  285,  272,  173,   65,   92,   16,   29,   18,  286,  178,  373,\n",
-      "          114,  288,   10,   21,  464,  173,   83,   16,   65,   18,   92,   16,\n",
-      "           29,   18,  265,   68,  142, 1089,  848,   36,  848,   36,  263,   36,\n",
-      "          144,   36,   10,  182, 1180,  142,  512,   83,   16,   65,   18,   92,\n",
-      "           16,   17,   18,  274,  178, 1270,    9,  286,   11,   91,   17,   26,\n",
-      "          116,   16,  117,   18,   16,   20,   18,   24,   93,   68,   28,  173,\n",
-      "           83,   16,   65,   18,   92,   16,   17,   18,  229,  145,   83,   16,\n",
-      "          956,   18,   53,  168,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  116,   16,   29,   18,   16,   30,\n",
-      "           18,  230,   11,   91,   13,   34,  116,   16,  117,   18,   16,   20,\n",
-      "           18,   24,   93,   34,  114,   11,   91,   13,   19,  116,   16,  117,\n",
-      "           18,   16,  105,   18,   24,   93,  168,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   10,   12,   29,   26,   17,   26,   20,   26,   30,\n",
-      "           26,  133,   26,  482,   25,   26,   27,   28,   10,   12,   13,   14,\n",
-      "           20,   22,   13,   22,  483,   25,   26,    9,   31,   28,  102,  484,\n",
-      "          307,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  32,  116,   16,   29,   18,   16,   29,   19,   20,   35,   18,  722,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  248,   15,   16,   13,   18,\n",
-      "           19,  641,   15,   16,   17,   18,  125,   10,   29,  241,   13,  589,\n",
-      "           23,  249,  113,   91,   13,   93,  589,   29,  113,   91,   13,   93,\n",
-      "           91,   23,   26,   34,  887,   93,  253,  229,  125,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7, 2118,  460,   83,   16,  151,   18,   19,   83,   16,    9,   18,\n",
-      "           92,   16,   29,   18,   83,   16,   28,   18,   92,   16,   29,   18,\n",
-      "           83,   16,   65,   18,   92,   16,   29,   18,  102,  239,   83,   16,\n",
-      "          151,   18,   10,  819,   15,   16,   82,   18,  153,   10,   17,   83,\n",
-      "           16,  154,   18,   10,   83,   16, 1624,   18,   92,   16,   29,   18,\n",
-      "           10,   29, 1625,  107,   83,   16,  153,   18,   92,   16,   29,   18,\n",
-      "           83,   16,  154,   18,   92,   16,   29,   18,  719,  609,  741,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 271,  272,  273,  178,  231,  285,  272, 1469,  102,    9,   91,   17,\n",
-      "           26,   23,   93,   28,   11,   91,  228,   16,   17,   18,   26,  116,\n",
-      "           16,  117,   18,   16,   21,   18,   24,   93,   65,   11,   91,  228,\n",
-      "           16,   17,   18,   26,  116,   16,   20,  117,   18,   16,   21,   18,\n",
-      "           24,   93,   66,   91,   17,   26,  117,   93, 1470, 1245,   16,  153,\n",
-      "           18, 1245,   16,  154,   18, 1245,   16,  269,   18,  104,  234,   11,\n",
-      "           91,   29,   26,  116,   16,  117,   18,   16,   17,   18,   24,   93,\n",
-      "           91,   29,   26,  117,   93,  173,  464,   92,   16,   29,   18, 1470,\n",
-      "         1245,   16,  153,   18,  173,  464,   92,   16,   17,   18, 1470, 1245,\n",
-      "           16,  154,   18,  173,  464,   92,   16,   20,   18, 1470, 1245,   16,\n",
-      "          269,   18, 1269,  464,   92,   16,   29,    0],\n",
-      "        [ 285,  272,  102,   62,  280,   68,  464,   11,   91,  287,   92,   16,\n",
-      "           23,   18,   26,  288,   92,   16,   23,   18,   24,   93,   11,   91,\n",
-      "          287,   92,   16,   23,   18,  257,   23,   24,   93,  173,   65,  137,\n",
-      "          287,   10,   21,  230,  288,  107,  277,  106,    9,   91,   21,   26,\n",
-      "           23,   93,  848,  352, 1571,  142,  288,   92,   16,   23,   18,   10,\n",
-      "          116,   16,  117,   18,   16,   20,   18,  249,  229,  287,   92,   16,\n",
-      "           23,   18,  277,  286,  178,  464,   65, 1182,  142, 1089,  848, 1721,\n",
-      "          229,  142,   68,  512,  286,  178,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  135,   92,   16,   29,   18,   26,  135,   92,   16,   17,   18,\n",
-      "          255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   34,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           91,  125,  257,  170,  257,   23,   93,  138,  139,  142,   65,  238,\n",
-      "           62,  140,  141,  145, 1717,   92,   16,   17,   18,   56,  229,   65,\n",
-      "          457,   68,  142,  146,   92,   16,   29,   18,  172,  146,   92,   16,\n",
-      "           17,   18,  145,  135,   92,   16,   29,   18,  146,   92,   16,   17,\n",
-      "           18,   53,   54,  182,  229,  170,  610,  125,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 764, 1668, 1669,  696, 1670,  217, 1671, 1672, 1668, 1673,  102,   96,\n",
-      "         1674, 1675, 1676,   85, 1674, 1675, 1677,   96, 1674, 1675, 1678, 1671,\n",
-      "         1679, 1668, 1673, 1674,  544, 1675,  430, 1667,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,    9,   28,   65,   66,  256,  135,  233, 1791,  102,  718, 1792,\n",
-      "           52, 1162, 1793,  239,   83,   16, 1794,   18,   10,  201,   15,   16,\n",
-      "           82,   18,  607,   66,  822, 1162,  822,  256,  607,   65,  822,  814,\n",
-      "          822,  135,  351,   15,   16,   82,   18,  241,  242, 1792,  172,  242,\n",
-      "         1795,  229,  607,  256,  822,  154,  822,    9,  609,  610,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7, 1223, 1186,  180,   12,  125,   92,  131,   25,  125,   92,   16,\n",
-      "           29,   18,   10,   29,   26,  125,   92,   16,  131,   18,   15,   16,\n",
-      "           17,   18,   19,   11,   91,   17,  125,   92,   16,  131,   34,   29,\n",
-      "           18,   19,   29,   24,   93,  125,   92,   16,  131,   18,   19,   17,\n",
-      "          125,   92,   16,  131,   34,   29,   18,   10,   23,  229,  125,   92,\n",
-      "           17,   26,  125,   92,   20,  229,   12,  125,   92,  131,   25,  526,\n",
-      "          527,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,   83,   16,    9,   18,   10,   12,   29,   26,   17,   26,\n",
-      "           20,   25,   26,   83,   16,   28,   18,   10,   11,   12,   83,   16,\n",
-      "           13,   18,   36,   83,   16,   13,   18,   15,   16,   17,   18,   22,\n",
-      "          366,   24,   25,   26,   83,   16,    9,   18,   31,   83,   16,   28,\n",
-      "           18,   10,   91,   27,   93,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  248,   15,   16, 1312,   18,\n",
-      "           34,   13,   15,   16,   17,   18,   19, 1312,  241,  113,   91,   13,\n",
-      "           93,   91,   19,  887,   26,   23,   93,  251,  799,   91,   23,  584,\n",
-      "           34,  887,   93,  251,  888,  378,   13,   92,   16,   29,   18,   26,\n",
-      "           27,   13,   92,   16,   17,   18,  294,  118,   19,   29,   26,   27,\n",
-      "           29,  119,   36,  113,   11,   91,   13,   92,   16,   29,   18,   24,\n",
-      "           93,   19,  113,   11,   91,   13,   92,   16,   17,   18,   24,   93,\n",
-      "           36,  163,  248,   19,   29,  229,  171,  254,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,   13,  584,   79,  159,   11,   12,  160,  161,   16,  277,   18,\n",
-      "           13,   34,   20,   79,  163,   20,  164,   13,   19,   79,  165,   29,\n",
-      "          164,   79,  165,   23,  166,  161,   24,  167,   33,   10,   13,   34,\n",
-      "           79,  168,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  145,  151,   53,  116,   16,  366,  228,   16,   20,   18,   18,\n",
-      "           16,   21,   18,   56,  233,  157,   62,  148,  367,   62,  158,  182,\n",
-      "          117,   26,   62,  242,  151,  358,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  246,  142,   19,  151,  242,  592,  593,  155,   10,   29,   26,\n",
-      "           27,  153,   10,  594,   10,  228,   16,   20,   18,   26,   27,  153,\n",
-      "          172,  155,   26,   27,  153,  172,  594,   97,  114,  239,  595,   10,\n",
-      "          596,   26,  597,  114,  239,  598,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   10,   91,   29,   26,   17,   93,\n",
-      "           26,  889,   16,  170,   18,   10,   91,   17,   26,   19,   17,   93,\n",
-      "           26,  889,   16,  162,   18,   10,   91,   29,   26, 1348,   93,  261,\n",
-      "           16,   83,   16,  162,   18,   18,  469,  469,   91,   17,  261,   16,\n",
-      "           83,   16,  125,   18,   18,   34,  261,   16,   83,   16,  170,   18,\n",
-      "           18,   93, 1349, 1350,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  246,  142,  151,   99,  233,  157,   62,  148,  266,  268,  608,\n",
-      "          145,  151,   51,  236,  256,  135,  266,  268,  466,  239, 1941,   10,\n",
-      "          201,   15,   16,   82,   18,  157,   62,  247,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  150,  464,  137,   13,   15,   16,   17,   18,   34,   79,   15,\n",
-      "           16,   17,   18,   19,   17,   13,   19,   17,   79,   19,   17,   10,\n",
-      "           23,   26,  107,  277,  137,   17,   13,   34,   79,   34,   17,   10,\n",
-      "           23,   26,  142,  277,  265,  106,  142,  585,  150,  464,  176,  266,\n",
-      "          268,   26,  586,    9,   26,   28,   26,   36,  587,   36,  263,   36,\n",
-      "          153,   14,  588,  107,  153,  178,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 309,  310,  311,  312,  313,  314,  315,  316,  317,  318,  319,  320,\n",
-      "          321,  320,  322,  648,  324,  325,  320,  326,  327,  328,  329,  330,\n",
-      "          649,    7,  314,  332,  326,  333,  319,  320,  334,  335,  336,  337,\n",
-      "          338,  320,  340,  319,   71,  341,  328,  342,  203,  319,  320,  321,\n",
-      "          337,  326,  320,  344,  320,  321,   71,  346,  347,  348,  328,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   65,  726,   79,   10,  116,   16,   13,\n",
-      "           15,   17,   18,   16,   21,   18,  107,  277,  726,   79,   10,  566,\n",
-      "           34,  125,   91,  125,  962,   23,   93,  515,  464,  465,  362,  278,\n",
-      "           10,   23,  249, 1752,   65,   68,  464,  465,  579,  176,  178,   79,\n",
-      "         1314,   68,  142,  278, 1753,  249, 1754,  239, 1755,   10,  239, 1756,\n",
-      "          449,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 738,    7,  173,   65,  137,   79,   10,  116,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   16,   17,   18,   26,   66,  107,   79,   10,   19,\n",
-      "          116,   16,   29,   18,   16,   17,   18,  265,   66,  585,   65,  359,\n",
-      "          176,  586,    9,   26,   28,  241,  107,  153,  270,  256,   11,   91,\n",
-      "           23,   26,  116,   16,   30,   18,   16,   17,   18,   24,   93,  234,\n",
-      "          104,  107,  153,  357,  586, 1089,  153,  466,  429,  104,  178,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  798,  129,  355,  279,  436,  130,  131,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  136,   65,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "           20,   18,   19,   79,   15,   16,   17,   18,   10,   29,   62,  140,\n",
-      "          141,  135,   65,  259,  139,  135,  107,   65,  359,  360,  267,  464,\n",
-      "          465,  145, 1894,  395,   36,   83,   16,  470,   18,   36,   10,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 824,  825,  826,  406,  190,  827,  828,  829,  827,   13,   81,  830,\n",
-      "          829,  831,   79,   81,  279,  829,  832,   33,   81,  830,  833,  834,\n",
-      "          829,  829,  827,  835,  829,  831,  836,   35,  837,   90,  585,  508,\n",
-      "           95,  217,  322,  610,   95,  554,   79,   10,  125,   34,  752,   79,\n",
-      "           10,  162,   34,  541,  228,   16,   13,   18,  103,  829,  831,   79,\n",
-      "          829,  827,   13,  100,  101,  446,  554,  838,  449,  839,  554,  840,\n",
-      "           90,  284,   79,   13,  100,    7,  190,  829,  832,   33,   13,   79,\n",
-      "           84,   33,  841,   79,  822,   13,  842,  843,   35,  829,  827,   13,\n",
-      "          844,  249,  829,  831,  829,  832,  845,  610,  846,  829,  827,   13,\n",
-      "          847,  829,  832,  845,  610,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  353,   92,   16,  131,   18,  370,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,  125,   92,   16,   29,   18,\n",
-      "          572,   23,   26,   27,  125,   92,   16,   17,   18,   10,   20,  125,\n",
-      "           92,   16,   29,   18,  116,   16,  353,   92,   16,   96,   18,   18,\n",
-      "           16,  353,   92,   16,   30,   18,   18,   10, 2034,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,   19,\n",
-      "           17,   79,   19,   17,  163,   23,  164,   13,   19,   79,   34,   29,\n",
-      "          589,   23,  164,   79,  163,   23,  166,  161,   24,  167,   33,   10,\n",
-      "           20,   13,   34,   17,   79,  168,  179,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,\n",
-      "           34,   17,   79,  163,   29,  164,   17,   13,   34,   79,  589,   19,\n",
-      "           29,  164,   13,   19,   79,  578,   23,  166,  161,   24,  167,   33,\n",
-      "          807,  822, 1840,  111,  737,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1358,   13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   17,\n",
-      "           13,   34,   79,   34,   20,  165,   23,  164,   13,   19,   17,   79,\n",
-      "           34,   21,  165,   23,  164,   13,   19,   17,  163,   23,  166,  161,\n",
-      "           24,  167,   33,   10,   13,   34,  116,   16,   29,   18,   16,   20,\n",
-      "           18,   79,  168, 1350,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  353,   92,   16,  131,   18,  370,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,    7,  353,   92,   16,  366,\n",
-      "           18,   10,   19,  125,   92,   16,   30,   18,  125,   92,   16,   20,\n",
-      "           18,   10,   21,  229,   11,   12,  125,   92,   16,  131,   18,   24,\n",
-      "           25,  526,  527,  125,   92,   16,   29,   18,  257,   23,  229,  353,\n",
-      "           92,   16,  131,   18,  165,  125,   92,   16,  131,   18,  131,  254,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   32,   33,   92,   16,   29,   18,   33,   92,   16,   17,   18,\n",
-      "           11,   36,   33,   92,   16,   29,   18,   24,   36,   10,   11,   36,\n",
-      "           33,   92,   16,   17,   18,   24,   36,   10,   17,   33,   92,   16,\n",
-      "           29,   18,   34,   33,   92,   16,   17,   18,   10,  228,   16,   20,\n",
-      "           18,   34,  296,   16,   35,   18,   11,   36,   33,   92,   16,   29,\n",
-      "           18,   19,   33,   92,   16,   17,   18,   24,   36,   10,    4,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   10,   11,   12,   13,   14,   13,   15,   16,   17,\n",
-      "           18,   19,   21,  578,   23,   24,   25,   26,   27,   28,   10,   12,\n",
-      "           13,   14,   17,   13,   34,  125,  578,   23,   25,   26,    9,   31,\n",
-      "           28,   10,   12,   13,   14,   19,   17,  163,   13,  578,   29,   25,\n",
-      "           26,  125,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 423,  353,   10,   29,   19,  116,   16,   29,   18,   16,   17,   18,\n",
-      "           34,  116,   16,   29,   18,   16,   20,   18,   19,  116,   16,   29,\n",
-      "           18,   16,   21,   18,   34,  721,   34,  116,   16,   29,   18,   16,\n",
-      "         1622,   18,   19,  116,   16,   29,   18,   16,  216,   18, 1623,  231,\n",
-      "          129,  995, 1159,  997,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1217, 1177,  459,  460,   83,   16,  151,   18,   19,   83,   16,    9,\n",
-      "           18,   92,   16,   29,   18,   83,   16,   28,   18,   92,   16,   29,\n",
-      "           18,   83,   16,   65,   18,   92,   16,   29,   18, 1218,  247, 1219,\n",
-      "          157,  153,  172,  154,  153,   10,  105,   83,   16,  154,   18,   10,\n",
-      "          134,  468,   92,   16,   29,   18,   10,   20, 1219,  168,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1206, 1394, 1206, 1395,  530, 1396, 1206, 1395, 1397,   71,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   13,  822,   36,   13,  125,   36,  822,   36,   13,\n",
-      "          822,   36,  125,  249,  229,  290,  113,   91,   13,   93,  589,   23,\n",
-      "          293,  113,   91,   13,   93,  578,   29,  229,  125,  254,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  255,   65,   92,   16,   29,   18,  116,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   16,  125,   15,   16,   17,   18,   18,   34,  116,\n",
-      "           16,   79,   15,   16,   17,   18,   18,   16,  170,   15,   16,   17,\n",
-      "           18,   18,   10,   29,   91,  125,  257,  170,  257,   23,   93,  259,\n",
-      "          139,  135,  513,   65,   92,   16,   17,   18,  139,  455,   65,   92,\n",
-      "           16,   29,   18,   64,   65,   92,   16,   17,   18,  233,  455,  135,\n",
-      "           13,  456,  352,  107,  361,   65,   92,   16,   29,   18,    9,   28,\n",
-      "          362,  361,   65,   92,   16,   17,   18,   65,   66,  362,   36,  269,\n",
-      "           36,   10,  116,   16,   21,   18,   16,   20,   18,   36,  153,   36,\n",
-      "          229,   65,   92,   16,   29,   18,  457,   61,  464,   65,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   17,   18,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[271, 272, 273, 178, 274, 275, 276, 102, 173,  65, 273, 178,  11,  12,\n",
-      "         160, 161,  16, 277,  18,  13,  10, 116,  16,  29,  19, 279,  15,  16,\n",
-      "          17,  18,  18,  16,  29,  34, 279,  15,  16,  17,  18,  18, 164,  79,\n",
-      "          10, 116,  16,  21, 279,  18,  16,  29,  34, 279,  15,  16,  17,  18,\n",
-      "          18, 166, 161,  24, 167, 279, 273, 140, 141,  62, 280,  13, 456, 580,\n",
-      "         282, 283, 284, 285, 272, 107, 277, 286, 178,  17, 287, 114, 288,  34,\n",
-      "         228,  16,  20,  18, 287, 230, 288,  34, 482,  10,  23, 229,  65, 277,\n",
-      "         274, 178, 229,  65,  68, 277, 358, 111,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [112, 113,  91,  13,  93,  10, 114,  91, 115,  13,  34, 796,  93, 797,\n",
-      "         798, 113,  91,  13,  93, 251, 799, 546,   3,   3,   3,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [  7,  17, 521, 288,  19, 521,  11,  91, 288,  34, 116,  16, 117,  18,\n",
-      "          16,  21,  18,  24,  93,  10, 133, 521, 288,  10,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [173,  79,  10,  20,  11,  91,  13,  15,  16,  17,  18,  34,  13,  24,\n",
-      "          93, 248,  15,  16,  13,  18,  68,  91,  23,  26,  23,  93, 579, 176,\n",
-      "         178,   4,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 242,  274,  275,  276,  102,  150,   62,  273,  178,   11,   12,  160,\n",
-      "          161,   16,  277,   18,   13,   10,  114,  288,  164,   79,   10,  230,\n",
-      "          288,  166,  161,   24,  167, 1392,  273,  106,   91,   23,   26,   19,\n",
-      "          228,   16,   17,   18,   93, 1160, 1393,  107,  277,  150,   62,  515,\n",
-      "            9,   28,  362,  229, 1393,  254,  229,  153,  466,  142,  512,  273,\n",
-      "          178,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   91,   13,   19,   29,   93,\n",
-      "          174,   13,   19,   13,   19,   29,  241,  113,   91,   13,   93, 1181,\n",
-      "         1113,   68,  113,   91,   13,   93,   10,   23,  380,  381,  138, 1718,\n",
-      "          138, 1718, 1719, 1720,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,    7,  459,  460,  151,   19,    9,   92,   16,   29,   18,   28,\n",
-      "           92,   16,   29,   18,   65,   92,   16,   29,   18,   59,  236,   55,\n",
-      "          462,   92,   16,   29,   18,   65,   92,   16,   29,   18,   65,  463,\n",
-      "          464,  465,  154,   28,   92,   16,   29,   18,   65,   92,   16,   29,\n",
-      "           18,  466,  142,  467,  238,   28,   92,   16,   29,   18,   65,   92,\n",
-      "           16,   29,   18,  142,  242,  361,  153,  256,  361,  155,  135,  241,\n",
-      "          468,   92,   16,   29,   18,  717,  470,  242,    9,   92,   16,   29,\n",
-      "           18,  471,  172,  242,  472,   92,   16,   29,   18,   65,   92,   16,\n",
-      "           29,   18,  135,   61,   62,    9,   92,   16,   29,   18,   28,   92,\n",
-      "           16,   29,   18,   65,   92,   16,   29,   18,   64,  473,  717,  718,\n",
-      "          472,   92,   16,   29,   18,   65,   92,    0],\n",
-      "        [1189, 1190, 1275, 1276,  441, 1188, 1167, 1277,  218, 1225,  829, 1194,\n",
-      "         1253,  829,  298, 1194,  313, 1194, 1278, 1279,   81, 1280,   90, 1193,\n",
-      "         1230, 1230, 1062, 1281,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 396,  397,  398,  399,  400,  714,  402,  403,  404,  405,  397,  406,\n",
-      "          402,  403,  407,   53,  408,  409,  410,  410,  102,  411,  412,  413,\n",
-      "          414,   85,  415,  405,  416,   90,   11,   91,   13,   92,   16,   35,\n",
-      "           18,   26,   79,   92,   16,   35,   18,   24,   93,   91,   35,   10,\n",
-      "           29,   26,   17,   26,   94,   26,   85,   93,   13,   92,   16,   35,\n",
-      "           18,   79,   92,   16,   35,   18,   35,  418,  419,  420,  421,   81,\n",
-      "          422,  402,  403,  423,  424,   92,   16,   35,   10,   29,   18,   15,\n",
-      "           16,   85,   18,   13,   92,   16,   35,   18,   10,  351,  424,   92,\n",
-      "           16,   35,   10,   29,   18,   15,   16,   85,   18,   79,   92,   16,\n",
-      "           35,   18,   10,  318,  424,   92,   16,   35,   10,   29,   18,   15,\n",
-      "           16,   85,   18,   11,   91,   13,   92,    0],\n",
-      "        [   7,  113,   91,   13,   93, 1423,   91,   19,  887,   26,   34,  887,\n",
-      "           93, 1066,  113,   91,   29,   19,   13,   93,   10,  113,   91,   29,\n",
-      "           34,   13,   93,  113,   91,   29,   93,   10,   17,  113,   91,   29,\n",
-      "           93,   34,  113,   91,   17,   93,   34,  113,   91,   20,   93,   34,\n",
-      "          721,   34,  113,   91,  203,   93,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 800,   50,   59,  713,  182,  520,  231,  800, 1069,   68,  464,  691,\n",
-      "         1070,    9,  800, 1069,   68,  465,  258, 1071, 1070,   28,  800,   55,\n",
-      "          464,  465, 1072,  102, 1073, 1072,  110,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  660, 1844,  234,   62,  523, 1845, 1844,   56,  151,   64,   62,\n",
-      "           66,  256,  135,  104,   62,   68,  145, 1846, 1847, 1848,  154, 1849,\n",
-      "          153,   57,  957,  669, 1850, 1851,  154, 1849,  153, 1083, 1084,  145,\n",
-      "           83,   16, 1846,   18,   26,   27,  145,   83,   16, 1852,   18,   26,\n",
-      "           27,  145,   83,   16, 1853,   18,   26,   27,   83,   16,   66,   18,\n",
-      "          256,  135,  455, 1854, 1855,   27,  145,   83,   16,  151,   18,   51,\n",
-      "         1058,  249,  877, 1854, 1855,  247,   81, 1019,   15,   20,  168,  179,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,  113,   91,   13,   93,   10,  886,   91,   17,   13,   34,  116,\n",
-      "           16,  117,   18,   16,   20,   18,   93,  122,  580,  123,   91,   27,\n",
-      "           93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  446, 1472,  829, 1473,  829,  764, 1474,  829, 1475,   81, 1476,\n",
-      "         1477, 1062,  102, 1063,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  116,   16,   29,   18,   16,\n",
-      "           13,   18,   19,   13,   34,  125,  174,   13,  250,  113,   91,   13,\n",
-      "           93,  251,  252,  113,   91,   13,   93,  138, 1113,   68,   13,   92,\n",
-      "           16,   29,   18,  584,   13,   92,   16,   17,   18,  241,  116,   16,\n",
-      "          113,   11,   91,   13,   92,   16,   29,   18,   24,   93,   19,  113,\n",
-      "           11,   91,   13,   92,   16,   17,   18,   24,   93,   18,   16,   13,\n",
-      "           92,   16,   29,   18,   19,   13,   92,   16,   17,   18,   18,   22,\n",
-      "          125,   19,   17,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  180,   11,   12,  125,   92,   16,  131,   18,   24,   25,   11,\n",
-      "           12,  170,   92,   16,  131,   18,   24,   25,  125,   92,   16,   29,\n",
-      "           18,   10,   29,   26,   27,  170,   92,   16,   29,   18,   10,   23,\n",
-      "           21,  125,   92,   16,  131,   34,   29,   18,   10,   20,  125,   92,\n",
-      "           16,  131,   18,   19,  170,   92,   16,  131,   18,   34,   21,   26,\n",
-      "           27,   21,  170,   92,   16,  131,   34,   29,   18,   10,   20,  170,\n",
-      "           92,   16,  131,   18,   19,  125,   92,   16,  131,   18,   19,   21,\n",
-      "          241,   11,   12,  125,   92,   16,  131,   18,   34,  170,   92,   16,\n",
-      "          131,   18,   24,   25,  132,   11,   12,  125,   92,   16,  131,   18,\n",
-      "           19,  170,   92,   16,  131,   18,   24,   25,  370,  229,   11,   12,\n",
-      "          125,   92,   16,  131,   18,   24,   25,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 274,  275,  276,  102,  107,   65,   92,   29,  726,   13,   10,   19,\n",
-      "           17,  104,   65,   92,   16,   17,   18,  137,   91,   13,   19,   29,\n",
-      "           93,   15,   16,   17,   18,   34,   91,   79,   19,   17,   93,   15,\n",
-      "           16,   17,   18,   10,   29,  140,  141,  280,   13,  456,  580,  282,\n",
-      "          283,  284,  285,  272,  229,   65,   92,   29,  584,   65,   92,   17,\n",
-      "          286,  178,  107,   65,   92,   20,  286,  178,  288,   10,  116,   16,\n",
-      "          117,   18,   16,   21,   18,   91,  287,  294,  573,   93,   61,   65,\n",
-      "           92,   17,   65,   92,   20,  267,  464,  465,  229,  145,   65,   92,\n",
-      "           17,  470,   53,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1816, 1817, 1818, 1819, 1820, 1821, 1822, 1823, 1824, 1825,   74,  766,\n",
-      "         1826, 1827, 1828, 1829, 1830, 1831, 1832,  710, 1833, 1831, 1832,  766,\n",
-      "         1784,    7,  180,  182,  837, 1834,   17,   15,   16,   23,   18, 1835,\n",
-      "           17,   15,   16,   23,   18,   26,   17,   15,   16,   29,   18, 1836,\n",
-      "           17,   15,   16,   23,   18,   26,   17,   15,   16,   29,   18,   26,\n",
-      "           17,   15,   16,   17,   18, 1837,  229,   86,  122, 1546,  465,  465,\n",
-      "          216,  180,  181,  465,  183, 1546, 1838, 1839, 1831, 1832,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  370,   11,   12,  125,   92,   16,  131,   18,   24,   25,  181,\n",
-      "          131,  183,   83,   16,  353,   18,   92,   16,  131,   18,  132,   11,\n",
-      "           12,  170,   92,   16,  131,   18,   24,   25,  181,  131,  183,   83,\n",
-      "           16,  499,   18,   92,   16,  131,   18,  125,   92,   16,   29,   18,\n",
-      "           10,   19,   29,  170,   92,   16,   29,   18,   10,   29,  125,   92,\n",
-      "           16,   17,   18,   34,  170,   92,   16,   17,   18,   10,   17,  125,\n",
-      "           92,   16,   20,   18,   34,  170,   92,   16,   20,   18,   10,   30,\n",
-      "          229,   11,   12,  170,   92,   16,  131,   18,   24,   25,  526,  527,\n",
-      "           83,   16,  499,   18,   92,   16,   20,   18,   10, 1598,  229,   83,\n",
-      "           16,  353,   18,   92,   16,   20,   18,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  37,   38,   39,   40,   41,   42,   43,   44,   45,   46,   47,   48,\n",
-      "           49,   47,   50,   51,   52,   53,   54,   49,   47,   55,   56,   53,\n",
-      "           55,   56,   57,   58,   59,   52,   51,   60,    3,    3,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,   62,  140,  141,  265,  464,  255,   65,  137,  116,   16,   13,\n",
-      "           15,   16,   17,   18,   18,   16,   17,   18,   34,   79,   15,   16,\n",
-      "           17,   18,   10,   29,  464,  585,   13,  456, 1221, 1571,  465,   68,\n",
-      "          142,  261,   16,   83,   16, 1615,   18,   18,   10,  228,   16,   17,\n",
-      "           18,  261,   16,   83,   16, 1616,   18,   18, 1180,  142,  512,  178,\n",
-      "         1270,  568,  107,   13,   10,   19,   20,  261,   16,   83,   16,  144,\n",
-      "           18,   18,  263,  261,   16,   83,   16, 1256,   18,   18,   10,   29,\n",
-      "          241,  106,  142,  591, 1617,  107,  277,   65,  258,  139,  135,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 230,   13,   10,   19,  116,   16,   17,   18,   16,   20,   18,   26,\n",
-      "          114,   17,   83,   16,   13,   18,   10,    4,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  32,   91,   29,   19,   35,   93,   15,   16,   21,   18,   10,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 185,  186,  187,  188,  189,  188,  190,   81,  191,  192,  193,    9,\n",
-      "           26,   28,   26,   65,   26,   66,   99,  194,  188,  189,  195,    9,\n",
-      "          196,   28,  196,   65,  196,  197,  198,  199,  200,  201,  202,  203,\n",
-      "          202,   85,  202,   66,  196,  197,  198,  204,  205,  206,  203,  202,\n",
-      "          207,  208,  209,  138,  210,  211,  188,  189,  212,  210,  188,  213,\n",
-      "          214,  202,  191,  209,  210,  188,  213,   85,  202,  191,  197,  210,\n",
-      "          211,  188,  189,  138,  210,  215,  188,  216,  191,  190,  217,  190,\n",
-      "          194,  218,  219,  212,  209,  220,  210,  188,  221,  190,    9,  196,\n",
-      "           71,  222,  209,  220,  210,  188,  216,  223,  224,  224,  197,  225,\n",
-      "          210,  211,  188,  189,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1333, 1654, 1655, 1153,  212,  209, 1537, 1582, 1252,  212, 1582, 1656,\n",
-      "          209, 1543, 1582,  212,   58, 1543, 1582, 1656, 1582,  495, 1657, 1582,\n",
-      "         1658, 1252, 1063, 1657, 1582, 1659, 1500, 1660,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   11,   12,  125,   92,   16,  131,   18,   24,   25,  599,  132,\n",
-      "          125,   92,   16,   29,   18,  125,   92,   16,   17,   18,   26,   27,\n",
-      "          125,   92,   16,   20,   18,  600,  601,  229,   11,   12,  125,   92,\n",
-      "           16,  131,   18,   24,   25,  599,  125,   92,   16,   29,   18,   10,\n",
-      "           29,   26,  229,  180,   11,   12,  602,   92,   16,  131,   18,   24,\n",
-      "           25,  181,  131,  183,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   16,   13,   36, 1760,  822, 1761,   28,   16,   13,\n",
-      "           36, 1762,  822,    9,  760,   28,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 688,  520,  798,  691,  258, 1071,   52, 1809,  395,   52,   51,  692,\n",
-      "         1809,  395,  688, 1810, 1811, 1812, 1812,   53,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  125,   26,  170,   26,  162,  294,  573,   26,  125,   34,  170,\n",
-      "           34,  162,   10,   23,   26,  574,   10,   29,  241,  575,   34,  540,\n",
-      "           34,  576,   22,   23,  577,   12,  125,   26,  170,   26,  162,   25,\n",
-      "          125,   26,  170,   26,  162,  102,  168,  241,  577,   12,  125,   26,\n",
-      "          170,   26,  162,   25,  165,  228,  118,   20,  119,   16,   21,   18,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 104,   13,   15,   16,   17,   18,   34,   79,   15,   16,   17,   18,\n",
-      "           19,   17,   13,   19,  134,   79,   34,  729,   10,   23,  234,  107,\n",
-      "          641,   34,   79,   19,   29,   10,   23,  358,  125,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   16,  822,  822,   28,   16,   13,   36,   13,  822,\n",
-      "           13,    9,   31,   28,   10,   91,   27,   93,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1145,  993,  705, 1146, 1147,  528, 1148,  837, 1149, 1146,  102, 1150,\n",
-      "          413, 1151,  414,  216,  705,  528, 1152, 1153, 1154, 1155,  528, 1156,\n",
-      "          705,  528,  102, 1156,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1517, 1518, 1519, 1520, 1521, 1522, 1520, 1523,   97, 1524, 1525, 1526,\n",
-      "         1527, 1517, 1520,  348, 1528,  483, 1524, 1521,   71,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1011,  406,  924,  175, 1012,  893, 1013, 1014, 1012,  530,  414,  182,\n",
-      "          924, 1017, 1018,   81, 1019, 1860,  893, 1299, 1034, 1012, 1861,  893,\n",
-      "          924, 1018, 1862, 1863,  465, 1864,  944,  893, 1861,  301,  973,  414,\n",
-      "          182,  924, 1865, 1018,  822, 1864, 1864, 1033,  924,  433,  229,  142,\n",
-      "          973, 1661,  973,  766, 1866, 1032,  924,  102, 1018,  822, 1864, 1864,\n",
-      "         1033,  924, 1034, 1012,  893, 1013, 1035, 1036,  534,  893, 1013, 1037,\n",
-      "         1041, 1011,  893, 1013,  413, 1867, 1014,  414,  182,  924, 1018,  423,\n",
-      "          425,   16,   13,   18,   10,  116,   16,   29,   18,   16,  182,   18,\n",
-      "          424,   92,   16,   35,   10,   29,   18,   15,   16,  182,   18,   13,\n",
-      "           92,   16,   35,   18,   10, 1020,   26,   27, 1021,   10,  228,   16,\n",
-      "          116,   16,   29,   18,   16,  182,   18,    0],\n",
-      "        [  61,   33,   10,  116,   16,   20,   19,   35,   18,   16,   29,   34,\n",
-      "           17,   35,   18,   36,   33,   36,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 104,   13,   15,   16,   17,   18,   34,   79,   15,   16,   17,   18,\n",
-      "           19,   17,   13,   19,  134,   79,   34,  729,   10,   23,  234,  107,\n",
-      "           83,   16,  125,   18,   13,   34,   79,   19,   29,   10,   23,  358,\n",
-      "           83,   16,  125,   18,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  800,   50,  138,   59, 1283,  604, 1284,  157,  148,  800,  247,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  125,\n",
-      "           92,   16,   29,   18,   34,  125,   92,   16,   17,   18,   10,   19,\n",
-      "           29,   26,   27,  125,   92,   16,   29,   18,   19,  125,   92,   16,\n",
-      "           20,   18,   10,   19,   20,   26,   27,  125,   92,   16,   21,   18,\n",
-      "           10,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  107,   65,   92,   16,   29,   18,  137,   27,\n",
-      "           13,   10,   19,   17,   26,   27,  104,   65,   92,   16,   17,   18,\n",
-      "          137,   91,   13,   19,   29,   93,   15,   16,   17,   18,   34,   91,\n",
-      "           79,   19,   17,   93,   15,   16,   17,   18,   10,   29,  140,  141,\n",
-      "          280,   13,  456,  580,  282,  283,  284,  285,  272,  229,   83,   16,\n",
-      "           65,   18,   92,   16,   29,   18,   26,   83,   16,   65,   18,   92,\n",
-      "           16,   17,   18,  286,  178,  107,   83,   16,   65,   18,   92,   16,\n",
-      "           20,   18,  286,  178,  288,   10,  116,   16,  117,   18,   16,   21,\n",
-      "           18,   91,  287,  294,  573,   93,   61,   83,   16,   65,   18,   92,\n",
-      "           16,   17,   18,   83,   16,   65,   18,   92,   16,   20,   18,  267,\n",
-      "          464,  465,  229,  145,   83,   16,   65,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  230,   13,   34,  116,   16,\n",
-      "           29,   18,   16,  230,   13,   18,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  353,   92,   16,  131,   18,  132,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,  125,   92,   16,   29,   18,\n",
-      "           10,  116,   16,   29,   18,   16,   20,   18,  584,  125,   92,   16,\n",
-      "           21,   18,   15,   16,   17,   18,   10,  125,   92,   16,  105,   18,\n",
-      "           26,  353,   92,   16,   30,   18,   10,  179,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738,    7,  173,   65,  137,   79,   10,  116,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   16,   17,   18,   26,   66,  107,   79,   10,   19,\n",
-      "          116,   16,   29,   18,   16,   17,   18,  265,   66,  585,   65,  359,\n",
-      "          176,  586,    9,   26,   28,  241,  107,  153,  270,  256,   11,   91,\n",
-      "           23,   26,  116,   16,   30,   18,   16,   17,   18,   24,   93,  234,\n",
-      "          104,  107,  153,  357,  586, 1089,  153,  466,  229,  811, 2037,   53,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 369,  368,   17,   15,   16,   13,   18,   19,   17,   15,   16,   79,\n",
-      "           18,   22,   20,   15,   16,   19,   13,   18,   19,   20,   15,   16,\n",
-      "           19,   79,   18,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 136,  162,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "           21,   18,   19,  116,   16,   79,   15,   16,   17,   18,   18,   16,\n",
-      "           17,   18,   10,   29,  259,  139,  135,   68,  142,   65,  175,  360,\n",
-      "           62,  140,  141,   36,  605,   36,   10,   36,  146,   36,  145, 2031,\n",
-      "           53,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,   49,   47,  142,  822,   63,  102,  266,  172,   59,   63,  594,\n",
-      "          469,  469,  154,  153,   10,  594,   10,  155,   10,   20,  266,   10,\n",
-      "          154,   10,   21,  464, 1089,  594,  238,  467,   10,   17, 1254,  465,\n",
-      "          608,  466,  241,  470,  469,  469,  242,  243,  229,  915,  465,  822,\n",
-      "         1255,  247,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1177, 1178,   63,   19,    9,   92,   16,   29,   18,   28,   92,\n",
-      "           16,   29,   18,   65,   92,   16,   29,   18,   66,   92,   16,   29,\n",
-      "           18,   59,  812,  468,   92,   16,   29,   18,   10,   21,  584,  153,\n",
-      "           10,   17,  584,  239, 1179,   10,  351,   15,   16,   82,   18,  584,\n",
-      "          256,  584,  464,  465,  154,  584,  462,   92,   16,   29,   18,   26,\n",
-      "          584,    9,   92,   16,   29,   18,   66,  466,  241,  470,  469,  469,\n",
-      "          242,   65,   92,   16,   29,   18,  560,  229,  607,    9,   19, 1183,\n",
-      "           92,   16,   29,   18,   19,  465,  720,  610,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1412,  151,  102,   28,   10,  116,   16,  117,   18,   16,   21,   18,\n",
-      "          154, 1067, 1212,  116,   16,   29,   18,   16,   20,   18,  154,  114,\n",
-      "            9,   54,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   36,   13,   34,   29,   36,\n",
-      "           19,   36,   13,   19,   17,   36,  229,  290,  113,  990,   13,  991,\n",
-      "          589,   29,  293,  290,  113,   91,   13,   93,  589,   13,   15,   16,\n",
-      "           17,   18,   19,   13,   34,  171,  293, 1319,  229,  171,  254,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 980,   40,  423, 1529,  610, 1530, 1478,  231, 1478,  129,  127,  129,\n",
-      "          355,   13,  131,  300,  355,  125,  130, 1021,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   13,   15,   16,   17,   18,\n",
-      "           19,   17,   13,   34,  125,   11,   91,  248,   15,   16,   13,  263,\n",
-      "           29,   18,   34,  248,   15,   16,   19,   13,   34,   29,   18,   24,\n",
-      "           93, 1181,  253,  125,   10,   91,   27,   93,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  169,  889,   16,  125,   18,   10,   91,   13,   26,   13,   34,\n",
-      "           29,   93,  889,   16,  170,   18,   10,   91,   29,   26,   17,   93,\n",
-      "          889,   16,  125,   18,  172,  889,   16,  170,   18,   13,   10,    4,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   12,   13,   36,   13,  257,   19,   29,   25,\n",
-      "           28,   10,   12,   13,   36,   13,   22,   17,   25,    9,  760,   28,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,  116,   16,  641,   15,   16,\n",
-      "           17,   18,   34,   13,   19,   29,   18,   16,  248,   15,   16,   13,\n",
-      "           18,   18,  229,  173,   79,   10,  113,   91,   13,   93,   68,  822,\n",
-      "          579,  176,  178,  241,  125,  165,   29,  249,  113,   91,   13,   93,\n",
-      "           34,  248,  165,   23,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  173,   79,   10,   13,   15,   17,   34, 1312,\n",
-      "           19,   17,   13, 1220,    9,   28,  362,   68,   65,  140,   91,   23,\n",
-      "           26,   29,   93,  171, 1058,  249, 1313,  155,  172,  154, 1059,  449,\n",
-      "          241,    9,   28,   65,  379,  104,   79, 1314,  108,  109,  525, 1315,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 705, 1394,  705, 1395,  102,  869,  330, 1620, 1621, 1395,   71,   91,\n",
-      "           27,   93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [2173,  682, 1409, 2174,  446, 2175, 2176, 1497, 2177, 2175, 1582,  249,\n",
-      "         2176, 1497,  102, 2178, 2179, 2180,  417, 1497, 1497, 2176, 1497, 2181,\n",
-      "          733, 2182,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 127, 1414,  129,  355, 1415,  436,  130,  610,   54, 1021,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  125,\n",
-      "           92,   16,   29,   18,   10,   20,   26,   27,  125,   92,   16,   29,\n",
-      "           18,   34,  125,   92,   16,   20,   18,   34,  125,   92,   16,   30,\n",
-      "           18,   10, 1598,  125,   92,   16,   20,   18,   34,  125,   92,   16,\n",
-      "           30,   18,   34,  125,   92,   16,  133,   18,   10,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1338,  102, 1339, 1340, 1341,   71, 1342, 1343, 1341, 1344, 1341,   71,\n",
-      "         1345, 1346, 1341,   71,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   13,   15,   16,   20,   18,\n",
-      "           34,  752,   34,  162,   26,   13,  294,  573,  173,  113,   91,   13,\n",
-      "           93,   68,   11,   91,  116,   16,   29,   18,   16,   17,   18,   26,\n",
-      "          113,   11,   91,  116,   16,   29,   18,   16,   17,   18,   24,   93,\n",
-      "           24,   93,  579,  176,   79,  456,  352,  229,  170,  113,   91,   13,\n",
-      "           93,  753,  754,  253,  241,  113,   91,   13,   93,  253,  754,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  230,  288,   34,  230,   11,   91,  288,   34,  116,   16,  117,\n",
-      "           18,   16,   20,   18,   24,   93,   10,   29,  230,   11,   91,  288,\n",
-      "           34,  116,   16,  117,   18,   16,  105,   18,   24,   93,   10,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  102,  797,  112,   79, 1347,  797,  107,   13,  736,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  35,   91,   17,   34,   20,   35,   93,   10,   91,   27,   93,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  135,   92,   16,   29,   18,   26,  135,   92,   16,   17,   18,\n",
-      "          255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "         1426,   18,   34,  116,   16,   79,   15,   16,   17,   18,   18,   16,\n",
-      "           85,   18,   10,   29,  138,  139,  464,   65,  238,  670,  646,  363,\n",
-      "          716,   92,   16,   29,   18,  135,   92,   16,   17,   18,  957,  669,\n",
-      "          464,  140,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 800,  242,  801,  802,  803,  523,  451,  519,  519,  520,  102,  691,\n",
-      "          692,  798,  804,  519,  158,  182,   85,  805,  451,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  128,  129,  130,  131,    3,    3,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1601, 1602, 1603,  338, 1604, 1605, 1606,  413, 1607, 1608,  249,  530,\n",
-      "          414,  216, 1605, 1017, 1609, 1603, 1607,   81,  898,  942, 1101, 1103,\n",
-      "          301,    9, 1455, 1604, 1606, 1610, 1611, 1607, 1301, 1612,  219,    9,\n",
-      "           71, 1613,  553,  553,  554, 1382,  556, 1611, 1607, 1606,  413, 1611,\n",
-      "         1607,  942, 1101, 1103,  894, 1606,  413, 1614,  450,  503,   15,   16,\n",
-      "           17,   18,   10,  116,   16,  131,   91,  539,   19,  540,   93,   15,\n",
-      "           16,   17,   18,   18,   16,   91,  125,   34,  170,   93,   91,  162,\n",
-      "           34,  541,   93,   91,  125,   34,  162,   93,   91,  170,   34,  541,\n",
-      "           93,   18,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   10,   91,  171,   26,   21,   93,\n",
-      "          889,   16,  170,   18,   10,   91,   20,   26,   19,   17,   93,  261,\n",
-      "           16,   83,   16,  125,   18,   18,  469,  469,  261,   16,   83,   16,\n",
-      "          170,   18,   18,  171, 1533,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 824, 1351, 1352, 1351, 1172, 1174, 1353,  440, 1351, 1174,  824, 1354,\n",
-      "         1355,  448,  413,  411,  412, 1356, 1150, 1357,  448,  413, 1350,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   19,   13,   15,   16,   17,\n",
-      "           18,   34,  641,   34,   21,   26,  477,   91,   13,   93,   10,   36,\n",
-      "           13,   34,   29,   36,   34,   36,   13,   19,   29,   36,  125,  249,\n",
-      "          229,  290,  113,   91,   13,   93,  589,  477,   91,   13,   93,  293,\n",
-      "          290,  113,   91,   13,   93,  589,  477,   91,   13,   93,  293, 1049,\n",
-      "          229,  125,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  557,   63,   19,    9,   92,   16,   29,   18,   28,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   29,   18,   66,   92,   16,   29,   18,\n",
-      "          102,   68,  256,   26,  135,  558,  559,   92,   16,   29,   18,   26,\n",
-      "          462,   92,   16,   29,   18,   17,  560,   10,  561,   92,   16,   29,\n",
-      "           18,   26,  562,   10,   17,  563,   92,   16,   29,   18,  241,  153,\n",
-      "           10,  154,  249,  564,  172,  155,   68,   65,   92,   16,   29,   18,\n",
-      "          242,  565,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    9,   28,  157,   62,  148,  362,  239,   83,   16,  958,   18,\n",
-      "           10,  201,   15,   16,   82,   18,   65,  148,  265,  246,   62,  151,\n",
-      "          247,  168, 1426,  157,   62,  158,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,   13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   20,\n",
-      "           13,   34,   17,   79,   19,  105,  163,   23,  164,   13,  165,   23,\n",
-      "          164,   79,  165,   23,  166,  161,   24,  167,   33,   10,   13,   19,\n",
-      "           79,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  174,   91,   29,   34,   36,\n",
-      "           13,   36,   93,   19,  116,   16,   29,   18,   16,   29,   34,   13,\n",
-      "           15,   16,   17,   18,   18,   26,  113,   91,   13,   93,  257,  113,\n",
-      "           91,   17,   13,   19,   29,   93,  698,   13,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 486,  416,   90,  102,   71,  373,   92,   16,   29,   18,   26,  373,\n",
-      "           92,   16,   17,   18,   26,  373,   92,   16,   20,   18,   26,  373,\n",
-      "           92,   16,   21,   18,  424,   92,   16,   35,   10,   29,   18,   15,\n",
-      "           16,   21,   18,  373,   92,   16,   35,   18,   10,   29,  723,  724,\n",
-      "          102,  416,  725,  486,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   51,   52,   63,  242, 1383, 1384, 1245,   16,  269,   18,  242,\n",
-      "          352,  464, 1245,   16,  269,   18, 1385,   65,   66,   68,  241,  242,\n",
-      "         1386,  172,  242, 1387,  246,  464,  822,  151,  247,  249, 2027, 2028,\n",
-      "         2029, 2030, 1074,  607,  720,  610,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  32,   33,   10,   29,   34,   35,   11,   36,   33,   15,   16,   17,\n",
-      "           18,   19,   17,   33,   24,   36,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 180,   11,   12,  125,   92,   16,  131,   18,   24,   25,  102,  125,\n",
-      "           92,   16,   29,   18,   10,   17,  125,   92,   16,  171,   34,  131,\n",
-      "           18,   10,  125,   92,   16,  171,   18,  125,   92,   16,  131,   18,\n",
-      "          125,   92,   16,  278,   34,   29,   18,   34,  125,   92,   16,  278,\n",
-      "           34,   17,   18,   34,   94,   34,  125,   92,   16,  278,   34,   96,\n",
-      "           18,   10,   17,   15,   16,  483,   18,   19,   17,   15,   16,   30,\n",
-      "           18,  278,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  811,   63,   52,  256,  135,  594,  154,  466, 1570, 1083,  145,\n",
-      "           83,   16, 1905,   18, 1084, 1085,   65, 1086,   68,  142, 1087, 1906,\n",
-      "          146,  172,  562,  241,  242, 1907,  172,  242, 1908,  229, 1909,  242,\n",
-      "         1908,  719,  720,  610,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,    7,  580,  246,  142,   19,  151,   55,  395,   83,   16,  266,\n",
-      "           18,   10,  105,  233,  142,  242,  151,  907,  908,   66,   66,  242,\n",
-      "          243,  907,  908,  256,  909,  910,  911,  361,  153,  853,  260,  241,\n",
-      "          260,  153,  466,  121,  102,  912,   68,  256,  242,  244,  907,  135,\n",
-      "          913,  449,  914,  915,  916,  247,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 712,  705,  328,  183,  331, 1727,  348,  183,  183,  331,  712, 2023,\n",
-      "          682,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738, 1439,  209,  894, 1440, 1441, 1442, 1443,  975, 1444,  409, 1441,\n",
-      "          530,  407,    9,   26,   28, 1369, 1370,  216,    9, 1418, 1441, 1445,\n",
-      "         1440, 1446,   28, 1418, 1441, 1447, 1440, 1446, 1441, 1448, 1446,  247,\n",
-      "         1449, 1450, 1451,  406, 1452,  413, 1453,  794, 1443, 1441, 1442, 1440,\n",
-      "         1454, 1444,   90, 1103,  301,   65, 1455,  209, 1440, 1443, 1442, 1454,\n",
-      "         1301, 1456, 1103,  142,   91,   65,   93,  430, 1457, 1458, 1440, 1443,\n",
-      "         1454, 1103,  102,  125,   26,  170,  610,  219,  212,  209, 1440, 1443,\n",
-      "         1454, 1459,  486,  102,   90,  545,  546,  547,  548,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   17,  174,   13,   34,   29,\n",
-      "          113,   91,   13,   93,  163,   17,   13,   34,  162,   26,  229,  162,\n",
-      "          254,  476,  125,  257,   23,   26,  250,  112,  477,   91,   13,   93,\n",
-      "           10,  116,   16,  113,   91,   13,   93,   19,  113,   91,  125,   93,\n",
-      "           18,   16,   13,   19,  125,   18,  251,  252,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   49,   47,  142,   19,   63,  102,  153,  469,  469,  269,  239,\n",
-      "         1005,   10,  239,   16, 1006,   18,   10,  201,   15,   16,   82,   18,\n",
-      "          241,  242,  243,  172,  242, 1007,   83,   16,  266,   18,   10,   83,\n",
-      "           16, 1008,   18,   10,   83,   16,  153,   18,   10,   83,   16, 1009,\n",
-      "           18,   26,   27,  239,   83,   16, 1010,   18,   10,  201,   15,   16,\n",
-      "           82,   18,   49,   47,  142,   19,   63,  247,  116,   16,  134,   18,\n",
-      "           16,   20,   18,  429,   49,   47,  245,   53,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1188, 1189, 1190, 1191, 1192, 1059, 1193, 1050,  102, 1194,  544, 1192,\n",
-      "          544, 1195, 1196,  121,  593,    9,   68, 1197,  544, 1192,  510,  483,\n",
-      "           28,   68, 1198,  544, 1195,  510, 1199, 1063,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,   11,   12,  125,   92,   16,  131,   18,   24,   25,  132,  125,\n",
-      "           92,   16,   29,   18,   34,  125,   92,   16,   17,   18,   34,  125,\n",
-      "           92,   16,   20,   18,   10,   29,   26,  125,   92,   16,   17,   18,\n",
-      "           34,  125,   92,   16,   20,   18,   34,  125,   92,   16,   21,   18,\n",
-      "           10,   17,   26,  125,   92,   16,  105,   18,   34,  125,   92,   16,\n",
-      "          133,   18,   34,  125,   92,   16,  134,   18,   10,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  135,   92,   16,   29,   18,   26,  135,   92,   16,   17,   18,\n",
-      "          255,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "         1426,   18,   34,  116,   16,   79,   15,   16,   17,   18,   18,   16,\n",
-      "           85,   18,   10,   29,  138,  139,  464,   65,  238,  670,  646,  363,\n",
-      "          716,   92,   16,   29,   18,  135,   92,   16,   17,   18,  957,  669,\n",
-      "          464,  140,    4,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   13,   15,   16,   20,   18,\n",
-      "           34,  641,   34,  116,   16,   29,   18,   16,   21,   18,   26,  477,\n",
-      "           91,   13,   93,   10,   19,  174,   13,  125,  847,   13, 1757,  173,\n",
-      "           79,   10,  113,   91,   13,   93,  176, 1016,   16,  171,  131,  171,\n",
-      "          131,  102,  111,   61,  112, 1758,   91,   13,   93,   10, 1759,   12,\n",
-      "          113,   91,   13,   93,   26,  477,   91,   13,   93,   25,   91,   13,\n",
-      "         1724,   23,   93,  250, 1758,   91,   13,   93,  253,  307,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  513,   65,   79,   15,   17,   10,   17,   13,  139,  135,  382,\n",
-      "           13,  456,  359,  107,  277,   92,   29,   26,  277,   92,   17,  361,\n",
-      "           65,    9,   28,  362,  361,   65,  458,  142,  568,  362,  135, 1089,\n",
-      "          153,  573, 1256,  466,  241, 1257,  469,  469, 1258,  145, 1259,   53,\n",
-      "          145, 1260,   53, 1261,  229,  153,  466,  512,  178,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   79,  159,   11,   12,  160,  161,   16,  277,   18,   13,   34,\n",
-      "           79,   19,   17,  578,   23,  164,   13,   19,   17,   79,   34,   29,\n",
-      "          163,   23,  164,   17,   13,   19,   79,   34,   17,  589,   23,  166,\n",
-      "          161,   24,  167,   33,  807,   79,  168,  179,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16, 1187,   18,   10,   91,  116,   16,   29,   18,\n",
-      "           16,   17,   18,   26,  116,   16,  228,   16,   20,   18,   18,   16,\n",
-      "           17,   18,   93,   26,  889,   16,  154,   18,   10,   91,  116,   16,\n",
-      "          228,   16,   20,   18,   18,   16,   17,   18,   26,  116,   16,   29,\n",
-      "           18,   16,   17,   18,   93,  239,  151,   10,    4,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  11,   91,   29,   34,   17,   13,   15,   16,   17,   18,   24,   93,\n",
-      "           91,   29,   34,   13,   93,   15,   16,   21,   18,  582,  102,   13,\n",
-      "           15,   16,   20,   18,  583,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[1575, 1309,  169,  889,   16,  125,   18,  889,   16,  170,   18,   36,\n",
-      "          889,   16,  125,   18,   34,  889,   16,  170,   18,   36,   10,   36,\n",
-      "          889,   16,  125,   18,   19,  889,   16,  170,   18,   36,   91,   27,\n",
-      "           93,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   83,   16,  135,   18,   92,   16,   29,   18,   26,   83,   16,\n",
-      "          135,   18,   92,   16,   17,   18,  136,  256,  137,  116,   16,   13,\n",
-      "           15,   16,   17,   18,   18,   16,   83,   16,  125,   18,   15,   16,\n",
-      "           17,   18,   18,   19,  116,   16,   79,   15,   16,   17,   18,   18,\n",
-      "           16,  170,   15,   16,   17,   18,   18,   10,   29,  258,  259,  139,\n",
-      "           68,  464,  256,  716,   92,   16,   29,   18,   13,  456,  352,  230,\n",
-      "          239,  716,   92,   16,   17,   18,  135,   92,   16,   29,   18,   10,\n",
-      "          116,   16,   29,   18,   16,   20,   18,  256,  457,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  486,  416,   90,   13,   92,   16,   29,   18,   26,   13,   92,\n",
-      "           16,   17,   18,   26,   94,   26,   13,   92,   16,  131,   18,  487,\n",
-      "          436,   90,   96,   13,   92,   16,   29,   18,   26,   96,   13,   92,\n",
-      "           16,   17,   18,   26,   94,   26,   96,   13,   92,   16,  131,   18,\n",
-      "          487,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738,  121,  463, 1461,   26, 1462,  363,  151,  812, 1463,  242,  979,\n",
-      "          153,   10,   29,   26,  814,   10,  562,   10,   17,  239, 1464,   10,\n",
-      "          351,   15,   16,   82,   18,  153,   26,  154, 1084,  814,  562,  455,\n",
-      "          951, 1465,  231,  241,  121,  102,  960,    9,   26,   65,   26,  260,\n",
-      "           26,   66, 1116,  718,  242,  151,  172,  242, 1466, 1467,  102,  607,\n",
-      "           28, 2035, 2036, 2035,    9,  857,    3,    3,    3,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 112,  113,   91,   13,   93,   10,  114,   11,   91,   20,   13,   34,\n",
-      "          116,   16,  117,   18,   16,  105,   18,   24,   93,  118,   23,  584,\n",
-      "          117,  119,  253,  307,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 107,   13,   79,   13,  456,   79, 1220,    9,   28,  362,   68,  142,\n",
-      "          104,   13,   15,   16,   17,   18,   34,   79,   15,   16,   17,   18,\n",
-      "           10,   17,  145,   83,   16, 1091,   18,   53,  254,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 125,  170,  162,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 528,  529,  530,  405,  531,  216,  532,  533,  194,  534,  535,  536,\n",
-      "          537,  218,   90,  538,   81,  500,  219,  542,  533,  194,   71,  229,\n",
-      "          543,  535,  536,  544,  537,  430,  486,  102,   90,  545,  546,  740,\n",
-      "          741,  548,  549,  533,  194,  303,  550,  533,  549,  533,  194,  303,\n",
-      "          550,  533,  551,   90,  552,  553,  553,  554,  555,  556,  543,  535,\n",
-      "          536,  537,  542,  534,  533,  450,  503,   15,   16,   17,   18,   10,\n",
-      "          116,   16,  131,   91,  539,   19,  540,   93,   15,   16,   17,   18,\n",
-      "           18,   16,   91,  125,   34,  170,   93,   91,  162,   34,  541,   93,\n",
-      "           91,  125,   34,  162,   93,   91,  170,   34,  541,   93,   18,   26,\n",
-      "           27,  116,   16,  142,   11,   91,  503,   15,   16,   17,   18,  589,\n",
-      "          278,   24,   93,   18,   16,  278,   18,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 274,  275,  276,  102,  173,   83,   16,   65,   18,   92,   16,   29,\n",
-      "           18,  273,  178,   11,   12,  160,  161,   16,  277,   18,   13,   10,\n",
-      "          228,   16,   20,   18,  114,  384,  164,   79,   10,  230,  384,  166,\n",
-      "          161,   24,  167, 1393,  273,  140,  141,  280,   13,  456,  580,  282,\n",
-      "          283,  284,  285,  272,  173,   83,   16,   65,   18,   92,   16,   17,\n",
-      "           18,  286,  178,  885,   16,  287,  886,   18,   11,   91,  288,   34,\n",
-      "          116,   16,  117,   18,   16,   21,   18,   24,   93,   10,   17,  228,\n",
-      "           16,   17,   18, 1269,   83,   16,   65,   18,   92,   16,   29,   18,\n",
-      "          178,   83,   16,   65,   18,   92,   16,   17,   18,  274,  178, 1270,\n",
-      "          142,   83,   16,   65,   18,   92,   16,   29,   18,   68,  568,   83,\n",
-      "           16,   65,   18,   92,   16,   17,   18,    0],\n",
-      "        [  61,  513,   83,   16,   65,   18,  137,   27,   83,   16,   79,   18,\n",
-      "           15,   16,   17,   18,   10,   17,   83,   16,   13,   18,   68,    9,\n",
-      "           91,   17,   26,   23,   93,   26,   28,   91,   19,   17,   26,   23,\n",
-      "           93,  106,    9,  107,  277,   65,  515,  464,  465,  362,  502,   13,\n",
-      "          456,  352,  249,  229,  107, 1047,  178,  241,  239,   83,   16, 1110,\n",
-      "           18,   10,  239,   83,   16, 1111,   18,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1124, 1125, 1126, 1127, 1128, 1129,  110, 1129, 1130,  110,  116,   16,\n",
-      "          228,   16,   30,   18,   19,   29,   18,   16,   17,   18,  116,   16,\n",
-      "          228,   16,   30,   18,   19,   29,   18,   16,   17,   18,  452, 1131,\n",
-      "          662, 1132, 1060, 1133, 1134, 1135, 1136, 1126, 1127, 1128, 1137,  110,\n",
-      "         1137, 1129,  110,  116,   16,  228,   16,   30,   18,   19,   29,   18,\n",
-      "           16,   17,   18, 1138,  138, 1132, 1060, 1139,  525, 1140, 1128, 1141,\n",
-      "         1142,  110, 1143, 1019, 1144,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   15,   16,  522,   18,   91,   13,   93, 1066,  113,\n",
-      "           91,   13,   93,   27,   91,   13,  294,  573,   93,  850,  112,  113,\n",
-      "           91,   19,   29,   93,   10,   23,   13,  962,   23,  249, 2039,   15,\n",
-      "           16,  522,   18,   91,   13,   93,   19,  113,   91,   13,   93,   22,\n",
-      "           23,  113,   91,   13,   93,  257,   23,  698,   13,  254,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  112,  113,   91,   13,   93,   10,   13,   15,   16,   20,   18,\n",
-      "           34,   91,  125,   19,   29,   93,   13,   15,   16,   17,   18,   34,\n",
-      "          641,  113,   91,   13,   93, 1066,  173,   79,   10,  113,   91,   13,\n",
-      "           93,   68,  579,  176,  178,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 371,   99,  372,  373,   92,   16,   29,   18,  220,  220,  374,  238,\n",
-      "          375,  107,  376,  242,  373,   92,   16,   17,   18,  377,  102,  378,\n",
-      "          379,  380,  381,  242,  373,   92,   16,   20,   18,  377,  359,  107,\n",
-      "          374,  359,  107,  382,  373,   92,   16,   21,   18,  107,  277,  383,\n",
-      "          242,  384,  107,  171,  172,  242,  384,  171,  172,  277,  372,  102,\n",
-      "          386,  372,  387,    4,  373,   92,   16,   29,   18,  389,  373,   92,\n",
-      "           16,   21,   18,  373,   92,   16,   29,   18,  389,  373,   92,   16,\n",
-      "           17,   18,  392,  373,   92,   16,   17,   18,  393,  373,   92,   16,\n",
-      "           20,   18,  392,  373,   92,   16,   20,   18,  393,  392,  373,   92,\n",
-      "           16,   21,   18,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   13,   15,   16,   20,   18,\n",
-      "           19,  566,   34,  278,   15,   16,   17,   18,  250,  113,   91,   13,\n",
-      "           93,  251,  252,  113,   91,   13,   93,  149,  253,  229,  278,  254,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   12,   13,   36,   13,   19,   29,  165,   23,\n",
-      "           25,   83,   16,   28,   18,   10,   12,   23,   26,   27,   29,   26,\n",
-      "           27,   17,   25,    9,   31,   28,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 980, 1320, 1321, 1322, 1323, 1324, 1325, 1324, 1326, 1327, 1328, 1329,\n",
-      "         1330, 1324,  686,  750, 1327, 1331, 1332, 1323, 1324, 1333, 1329, 1323,\n",
-      "         1324, 1334, 1335,  750, 1336, 1337, 1329, 1323, 1324,  692,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  116,   16,  230,   13,   34,   13,\n",
-      "           18,   16,  114,   13,   34,   13,   15,   16,   17,   18,   18,  118,\n",
-      "           19,  117,   26,  117,  119,  120,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  177,  278,  107,  277,  255,   65,  116,   16,   13,   15,   16,\n",
-      "           17,   18,   18,   16,   21,   18,   34,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,   20,   18,   10,   29,  515,    9,   28,  362,\n",
-      "         1089,  153,  466,  464,  171,  171,  241,  278,   22,   19,  116,   16,\n",
-      "           29,   18,   16,   17,   18,   61,  135,   65,  259,  139,  142,   65,\n",
-      "          238,  261,   16,   83,   16, 1390,   18,   18,   34,  261,   16,   83,\n",
-      "           16, 1391,   18,   18,   34,  261,   16,   83,   16,  563,   18,   18,\n",
-      "           10,  261,   16,   23,   18,  241,   17,   36,  261,   16,   83,   16,\n",
-      "         1390,   18,   18,   36,   10,   36,  261,   16,   83,   16, 1391,   18,\n",
-      "           18,   36,   34,   36,  261,   16,   83,   16,  563,   18,   18,   36,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  296,   16,  151,   18,  226,    9,   28,   65,  125,  170,  162,\n",
-      "          145,  296,   16,  151,   18,   53,  116,   16,  125,   15,   16,   17,\n",
-      "           18,   34,  170,   15,   16,   17,   18,   19,  162,   15,   16,   17,\n",
-      "           18,   18,   16,   21,   18,   65,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 750,   83,   16,   63,   18,   19,   83,   16,    9,   18,   92,   16,\n",
-      "           29,   18,   83,   16,   28,   18,   92,   16,   29,   18,   83,   16,\n",
-      "           65,   18,   92,   16,   29,   18,   83,   16,   66,   18,   92,   16,\n",
-      "           29,   18,  102,   83,   16,  153,   18,   10,   83,   16,  154,   18,\n",
-      "           10,   29,   26,   27,   83,   16,  468,   18,   92,   16,   29,   18,\n",
-      "           10,  228,   16,   20,   18, 1625,  107,   83,   16,  594,   18,   92,\n",
-      "           16,   29,   18,   83,   16, 2135,   18,   92,   16,   29,   18,  719,\n",
-      "          609,  741,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  13,   26,   79,  730,   84,   11,   12,  160,  161,   16,  277,   18,\n",
-      "           13,   34,   79,  165,   23,  164,   17,   13,   19,   79,  165,   23,\n",
-      "          164,   13,  163,   29,  166,  161,   24,  167,   33,   10,   20,   13,\n",
-      "           34,   17,   79,  168,    4,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1189, 1190, 1275, 1276,  441, 1188, 1167, 1277,  218, 1225,  829, 1194,\n",
-      "         1253,  829,  298, 1194,  313, 1194, 1278, 1279,   81, 1280,   90, 1193,\n",
-      "         1230,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  129, 1478, 1479, 1480,  764,   40,  766,  767,  763,  102, 1481,\n",
-      "         1482, 1483,  127,  129,  355,  125,  170,  759, 1484,  130,  125,    3,\n",
-      "            3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  112,  113,   91,   13,   93,   10,  114,   11,   91,   13,   34,\n",
-      "          116,   16,  117,   18,   16,   20,   18,   24,   93, 1062, 1281,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  290,  291,    7,  113,   91,   13,   93,   10,   36,   13,   34,\n",
-      "           29,   36,   19,   36,  641,   19,   29,   36,  125,   10,   29,  249,\n",
-      "          229,  290,  113,   91,   13,   93,  257,   29,  293,   13,  294,   91,\n",
-      "           23,   26,   29,   93,  249,  290,  113,   91,   13,   93,  257,   13,\n",
-      "          229,  125,  254,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  173,   79,   10, 1112,   15,   16,   13,   18,   34,   13,  174,\n",
-      "           13,   68,   91,   29,   26, 1112,   93,  579,  176,  178,   79,   10,\n",
-      "           17,   13,   34,  170,    4,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 750, 1595, 1596,   58,  233,  157,   62,  148,  157,   62,  158,  179,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 301,  353,   92,   16,  131,   18,  370,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,    7,  125,   92,   16,   29,\n",
-      "           18,   10,   19,  133,   26,   27,  353,   92,   16,   20,   18,   10,\n",
-      "           19,  483,  229,   11,   12,  125,   92,   16,  131,   18,   24,   25,\n",
-      "          526,  527,  229,   83,   16,  353,   18,   92,   16,  131,   18,  914,\n",
-      "           83,   16,  353,   18,   92,   16,  131,   18,  111,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 230,  384,   10,  116,   16,   29,   18,   16,   20,   18,   26,  114,\n",
-      "           17,  384,   10,    4,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   11,   12,  160,  161,   16,\n",
-      "          277,   18,   17,   15,   16,   13,   19,   29,   18,   19,   17,   26,\n",
-      "           13,  578,   29,  164,   19,  126,   92,   16,   17,   18,   91,   13,\n",
-      "           34,   29,   93,   26,   13,  257,   29,  166,  161,   24,  167,  113,\n",
-      "           91,  125,   93,   10,   19,   20,  113,   91,  105,   19,  125,   93,\n",
-      "           10,   91,   27,   93,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  169,  889,   16,  125,   18,  889,   16,  170,   18,  382,  169,\n",
-      "         1348,  889,   16,  125,   18,   34,  889,   16,  170,   18,  889,   16,\n",
-      "          125,   18,   34,   17,  889,   16,  170,   18,  382,  861, 1348,  737,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 145,  151,  226,    9,   28,   65,  125,  170,  162,  114,    9,   10,\n",
-      "          116,   16,   21,   18,   16,   30,   18,  114,   65,   10,  116,   16,\n",
-      "           30,   18,   16,  729,   18,  125,  170,  737,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  72,   73,   74,   75,   76,   77,   87,   78,   79,   80,   13,   81,\n",
-      "           15,   16,   82,   18,   83,   16,   65,   18,   84,   85,   80,   86,\n",
-      "           87,   88,   89,   89,   90,   11,   91,   13,   92,   16,   35,   18,\n",
-      "           26,   79,   92,   16,   35,   18,   24,   93,   91,   35,   10,   29,\n",
-      "           26,   17,   26,   94,   26,   85,   93,   95,   95,   96,   15,   16,\n",
-      "           82,   18,   83,   16,   65,   18,   97,   15,   16,   82,   18,   83,\n",
-      "           16,   65,   18,   98,   99,  100,  101,  102,  103,   78,   79,   80,\n",
-      "           13,  100,  101,    3,    3,    3,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 274,  275,  276,  102,  107,  277,   92,   29,  273,  178,   11,   12,\n",
-      "          160,  161,   16,  277,   18,   13,   10,   17,   34,  279,  164,   79,\n",
-      "           10, 1317,  166,  161,   24,  167,  279,  273,  107,  277,   92,   17,\n",
-      "          273,  178,   11,   12,  160,  161,   16,  277,   18,   13,   10,   19,\n",
-      "           17,   34,  171,  164,   79,   10,  116,   16,  171,   18,   16,  278,\n",
-      "           18,  166,  161,   24,  167,  171,  273,   61,  277,   92,   29,  277,\n",
-      "           92,   17,  267,  142,  278, 1058,  249,  142,  512,  173,   65, 1269,\n",
-      "           65,  178,  140,  141,  280,   13,  281,  282,  283,  284,  285,  272,\n",
-      "           61,  277,   92,   16,   20,   18,  137,  287,   91,  114,  288,   34,\n",
-      "          230,  288,   93,   19,  228,   16,   17,   18,   10,   23,  464,  277,\n",
-      "           92,   20,   65,  267,  229,  464, 1318,    0],\n",
-      "        [ 764,   40, 1929, 1930, 1931,  700, 1932, 1058, 1933, 1934, 1935,  704,\n",
-      "         1936, 1936,  193, 1937, 1938,  231, 1939, 1931, 1934,  102,  530,  987,\n",
-      "         1939, 1931, 1934, 1652, 1940, 1936,   71,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  125,  257,   23,   26,   27,  170,  257,   23,   26,   27,  125,\n",
-      "           15,   16,   20,   18,   34,  170,   15,   16,   20,   18,   10,   17,\n",
-      "          241,   91,  125,   34,  170,   93,   11,   91,  125,   15,   16,   30,\n",
-      "           18,   34,  170,   15,   16,   30,   18,   24,   93,  589,   21,  125,\n",
-      "           34,  170,  163,   17,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 738,  363,  151,  226,    9,   26,   28,   26,   65,  125,   26,  170,\n",
-      "           26,  162,    7,  125,  230,  116,   16,    9,   34,   65,   18,   16,\n",
-      "           17,   18,   10,  170,  230,    9,  229,   28,  363,  151, 1460,  669,\n",
-      "          162,   10,   29,  229,  363,  151,   53,  254,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  174,   91,  228,   16,   29,\n",
-      "           34,   13,   15,   16,   17,   18,   18,   19,   13,   93,   34,   29,\n",
-      "          113,   91,  125,   93,   10,   21,  113,   91,   19,  125,   93, 1359,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 271,  290,  291,   61,   13,   26,   79,   26,   33,  294,  573,   13,\n",
-      "           34,   79,   34,   33,   10,   29,  229,   91,   13,   19,   29,   93,\n",
-      "           15,   16,   17,   18,   34,   91,   79,   34,   29,   93,   15,   16,\n",
-      "           17,   18,   34,   91,   33,   34,   29,   93,   15,   16,   17,   18,\n",
-      "          111,   91,   13,   19,   17,   93,   15,   16,   17,   18,   34,   91,\n",
-      "           79,   19,   29,   93,   15,   16,   17,   18,   34,   91,   33,   19,\n",
-      "          125,   93,   15,   16,   17,   18,  165,  116,   16,   29,   18,   16,\n",
-      "           20,   18,  698,  241,  125,  163,   19,   20,  125,  165,   19,   29,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  173, 1813,   79,   10,  114,   13,   26,   27,   65,   92,   16,\n",
-      "           17,   18,  137,   79,   10,  230,   11,   91,   17,   13,   34,  116,\n",
-      "           16,   17,  117,   18,   16,   20,   18,   24,   93, 1062, 1063,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  255,   65,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "           17,   18,   34,   79,   15,   16,   17,   18,   10,   29,  259,  139,\n",
-      "          135,  135,  107,  277,   65,  515,    9,   28,  362,   68,  464,  140,\n",
-      "          277,   13,  456,  352,  249,  229,  107,  467,  178,   61,   62,  140,\n",
-      "          141,  241,  239,   83,   16, 1910,   18,   10,  239,   83,   16, 1911,\n",
-      "           18,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,  248,   15,   16,   13,   18,\n",
-      "           11,   91,  248,   15,   16,   13,   18,   19,  125,   24,   93,   19,\n",
-      "          125,   15,   16,   17,   18,   13,  250,  113,   91,   13,   93,  251,\n",
-      "          252,  113,   91,   13,   93,  589,   23,  229,  125,  254,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,   68,    9, 2035,   28,  265,  464,   13,   79,  107,  467, 1047,\n",
-      "          177, 2207,   19,  116,   16,   29,   18,   16,   17,   18,  301,  464,\n",
-      "          512,  173,   65,  229,   65,  178,   65,  173,  140,  141,  107,  361,\n",
-      "           65,  142,  568,  362,   68,  142,  670,  646,  910,  815,   13,  456,\n",
-      "         1571,  256,  951, 2208,  911,  361,   65,  853,  260,   35,  241,  145,\n",
-      "         2209,  395,  846,  229,  145, 2209,   53,  168,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,  750,   63,  822, 1501,  102,  153,  182,  154,   96, 1502,   68,\n",
-      "          256,  135,   83,   16,    9,   18,   92,   16,   29,   18,   83,   16,\n",
-      "           28,   18,   92,   16,   29,   18,   26,   27,   83,   16,   66,   18,\n",
-      "           92,   16,   29,   18,   83,   16,   65,   18,   92,   16,   29,   18,\n",
-      "           26,   27,   83,   16,    9,   18,   92,   16,   29,   18,   83,   16,\n",
-      "          256,   18,   10,   83,   16,   66,   18,   92,   16,   29,   18,   83,\n",
-      "           16,  135,   18,   10,   21,  167,   27,   83,   16,  256,   18,   26,\n",
-      "           27,  135, 1503,  384,  750,  718,  374, 1504,  858,   52,  121,  964,\n",
-      "          794,   52, 1505, 1506,  449,  229,  242,  384,  750,  407,  220,  247,\n",
-      "           60,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231, 1859,  142,   63,  102,  153,  269,  239, 1005,   10,  239, 1006,\n",
-      "           10,  201,   15,   16,   82,   18,  241,  242,  243,  172,  242, 1007,\n",
-      "          266, 1008,  153, 1009,  239,   83,   16, 1010,   18,   10,  201,   15,\n",
-      "           16,   82,   18,  229,  607,    9,  268,   65,  609,  610,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1412,  151,  102,  114,  116,   16,   65,   18,   16,   17,   18,   10,\n",
-      "          116,   16,  228,   16,   30,   18,   18,   16,   30,   18,  154,  155,\n",
-      "          153,   91,   27,   93,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   11,   12,   91,   13,   26,   79,   93,   36,\n",
-      "           13,   15,   16,   17,   18,   34,   79,   15,   16,   17,   18,   10,\n",
-      "           29,   24,   25,   26,   27,   28,   10,   12,   91,   13,   26,   79,\n",
-      "           93,   36,   79,   10,   13,   25,    9,   31,   28,  102,  484,  307,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    8,    9,   16,   13,   36,   13,  757,  131,  758,  465,   28,\n",
-      "           16,   96,  298,  759,    8,    9,  760,   28,  102,  484,  307,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  104,   13,   15,   16,   17,   18,   34,   79,   15,   16,   17,\n",
-      "           18,   19,  105,   13,   10,   23,  106,  107,  104,  108,  109,  110,\n",
-      "          111,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  446, 1472,  829, 1473,  829,  764, 1474,  829, 1475,   81, 1476,\n",
-      "         1477, 1062,  102, 1063,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  246,  353,   19,  151,  233,  157,   62,  148, 1000,  157,   62,\n",
-      "          604,  242,   83,   16, 1001,   18,  172,  242, 1002, 1003,   10,  155,\n",
-      "         1004,   10,  154,  246,  353,   19,  151,  247,  366,  157,   62,  158,\n",
-      "          179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  13,   79,  159,   11,   12,  160,  161,   16,  162,   18,   17,   13,\n",
-      "           34,   79,   19,   17,  163,   23,  164,   13,   19,   79,   19,   29,\n",
-      "          589,   23,  164,   79,   34,   29,  589,   23,  166,  161,   24,  167,\n",
-      "           33,   10,   13,   34,  133,   79,  168,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  750,   63, 1647,    9,   92,   16,   29,   18,   28,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   29,   18,   66,   92,   16,   29,   18,\n",
-      "           59,   63,   52,   68,  256,  558,  468,   92,   16,   29,   18,  814,\n",
-      "          172,  821,   92,   16,   29,   18,  241,  814,  815,  242,  472,   92,\n",
-      "           16,   29,   18,   65,   92,   16,   29,   18,  603,   10,    9,   92,\n",
-      "           16,   29,   18,  256,  153, 1600,   47,  256,   19,  462,   92,   16,\n",
-      "           29,   18,   65,   92,   16,   29,   18,   65,  247,    3,    3,    3,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 889,   16,  125,   18,   10,   91,   29,   26,   19,   29,   93,   26,\n",
-      "          889,   16,  170,   18,   10,   91,   19,   29,   26,   17,   93,   91,\n",
-      "           17,  889,   16,  125,   18,   34,  889,   16,  170,   18,   93,  263,\n",
-      "          889,   16,  125,   18,   10,   91,   27,   93,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   13, 1112,   15, 1762,  125,  248,   15,   16,   13,\n",
-      "           13,  250,  113,   13,  251,  252,  113,   13,  138,  253,  229,  125,\n",
-      "          254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 173,   79,   10,   17,  174,   13,   68,  579,  176,  178,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  112,  113,   91,   13,   93,   10,   36,   17,   13,   19,  125,\n",
-      "           36,   34,  125,  125,   10,   17,  249,  229,  290,  113,   91,   13,\n",
-      "           93, 1271,  105, 1272,  112,  477,   91,   13,   93,   10,   36,   17,\n",
-      "           13,   19,   29,   36,   13,  294,  573,  249,  113,   91,   13,   93,\n",
-      "           34,  477,   91,   13,   93,  165,   20,  229,  125,  254,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 180,   11,   12,  125,   92,   16,  131,   18,   24,   25,  102,  125,\n",
-      "           92,   16,   29,   18,   10,   17,   26,   27,  125,   92,   16,  131,\n",
-      "           34,   29,   18,   10,   17,  125,   92,   16,  131,   18,  353,   92,\n",
-      "           16,  131,   18,   11,   12,  125,   92,   16,  131,   18,   24,   25,\n",
-      "          181,  131,  183,  353,   92,   16,  131,   18,   10,  806,  131,   10,\n",
-      "          179,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7, 1158,  169,  125,  170,   36,  125,   36,   10,   17,   36,  170,\n",
-      "           36,   91,  125,   19,  170,   93,  172,  170,  125,  170,  350,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,   66,  232,  233,   62,  232,   59,  234,  603,   59,  604,  603,\n",
-      "          594,  145,  151,   59,  235,  236,  142,  237,  238,  605,   10,  116,\n",
-      "           16,  228,   16,  105,   18,   18,   16,  105,   18,  237,  241,   27,\n",
-      "          266,  172,  242,  606,  229,  607,   28,   19,  608,   19,  256,  609,\n",
-      "          610,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 980, 1682, 1683, 1684, 1685, 1683, 1684,  548, 1685,   44, 1686,  750,\n",
-      "          882, 1687, 1688, 1125, 1689, 1690, 1691, 1685,   44, 1383, 1692,  121,\n",
-      "         1383, 1692,  894,  894, 1693,  858,  688, 1383, 1692, 1694,  766,  736,\n",
-      "         1695,  121, 1696, 1697, 1383, 1692,  233, 1284,  882, 1069,  882, 1698,\n",
-      "         1383, 1692,  682, 1699, 1700, 1701, 1699, 1702,  670, 1703,  417, 1703,\n",
-      "          417,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 113,   91,   13,   93,   10,  114,   13,   19,  230,   13,  118,   23,\n",
-      "          584,  125,  119, 1627,  112,  125,  168,   91,   27,   93,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  915,   63,  102,  145,   83,   16,  151,   18,  236,  145,   83,\n",
-      "           16,  823,   18,  395,  239, 2016,   10,  239, 2017,  164,    9,   28,\n",
-      "           28,   66,  164,  241,  242,  823,  172,  242,  151,  155,  242,  361,\n",
-      "          813,  853,  256, 2018,  816,  915,   63,  407,  247,  220,  229,  607,\n",
-      "           66,  603,   65,  609,  610,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 353,   92,   16,  131,   18,  370,   11,   12,  125,   92,   16,  131,\n",
-      "           18,   24,   25,  181,  131,  183,  125,   92,   16,   29,   18,   10,\n",
-      "           29,  353,   92,   16,  133,   18,   10,  881,  301,  170,   92,   16,\n",
-      "          131,   18,   10,   11,  118, 1532,  125,   92,   16,  131,   18,   24,\n",
-      "          119,  118,   13,  119,  339,   13, 1546,  118, 1436,  119,   10,   23,\n",
-      "          118, 1532, 1622,  119,   10,   29,  229,  170,   92,   16,   29,   18,\n",
-      "          170,   92,   16,  482,   18,  170,   92,   16, 2086,   18,  229,  180,\n",
-      "           11,   12,  170,   92,   16,  131,   18,   24,   25,  181,  993,  183,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  230,   15,   16,   17,   18,   13,\n",
-      "           34,  228,   16,   20,   18,  114,   13,   19,  116,   16,   20,   18,\n",
-      "           16,   21,   18,   11,   91,   13,  294,   11,  118,   23,   26,  116,\n",
-      "           16,  117,   18,   16,   17,   18,   24,  119,   24,   93,  168,    4,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1011,  406,  924,  175, 1012,  893, 1013, 1014, 1015,  596, 1016, 1012,\n",
-      "          530,  414,  924, 1017, 1018,   81,  726, 1019, 1014,  300,  414,  182,\n",
-      "          924, 1018,  423,  425,   16,   13,   18,   10,  116,   16,   29,   18,\n",
-      "           16,  182,   18,  424,   92,   16,   35,   10,   29,   18,   15,   16,\n",
-      "          182,   18,   13,   92,   16,   35,   18,   10, 1020,   26,   27, 1021,\n",
-      "           10,  228,   16,  116,   16,   29,   18,   16,  182,   18,  424,   92,\n",
-      "           16,   35,   10,   29,   18,   15,   16,  182,   18,   11,   91,   13,\n",
-      "           92,   16,   35,   18,   19,  425,   16,   13,   18,   24,   93,   15,\n",
-      "           16,   17,   18,   18,   10,  228,   16,  116,   16,   29,   18,   16,\n",
-      "          182,   18,   11,   91,  424,   92,   16,   35,   10,   29,   18,   15,\n",
-      "           16,  182,   18,   13,   92,   16,   35,    0],\n",
-      "        [1601, 1602, 1603,  338, 1604, 1605, 1606,  413, 1607, 1608,  249,  530,\n",
-      "          414,  216, 1605, 1017, 1609, 1603, 1607,   81,  898,  942, 1101, 1103,\n",
-      "          231,   61,  894, 1606,  413, 1611, 1607,  880, 1734,  301,    9, 1455,\n",
-      "         1604, 1606, 1610, 1611, 1607, 1301, 1612,  338, 1606, 1610, 1611, 1607,\n",
-      "         1301, 1612,  219,    9,   71, 1613,  553,  553,  554, 1382,  556, 1611,\n",
-      "         1607, 1606,  413, 1611, 1607,  942, 1101, 1103, 2127, 1606, 2128, 1607,\n",
-      "         1379,  430,  435,  436,   83,   16,  503,   18,   15,   16,   17,   18,\n",
-      "           10,  116,   16,   83,   16,  131,   18,   91,   83,   16,  539,   18,\n",
-      "           19,   83,   16,  540,   18,   93,   15,   16,   17,   18,   18,   16,\n",
-      "           91,   83,   16,  125,   18,   34,   83,   16,  170,   18,   93,   91,\n",
-      "           83,   16,  162,   18,   34,   83,   16,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  255,  256,   64,  140,  141,  457,  116,   16,   29,   18,   16,\n",
-      "           17,   18,  256,  259,  139,  513,   65,   79,   15,   16,   17,   18,\n",
-      "           10,  134,   13,  139,  455,    9,   28,   65,  458,  256,  138,  267,\n",
-      "           36,  153,   36,   10,   91,   27,   93,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 882,   83,   16,   63,   18,   19,   83,   16,    9,   18,   92,   16,\n",
-      "           29,   18,   83,   16,   28,   18,   92,   16,   29,   18,   83,   16,\n",
-      "           65,   18,   92,   16,   29,   18,   83,   16,   66,   18,   92,   16,\n",
-      "           29,   18,  102,  256,  558, 1624,   92,   16,   29,   18,  466, 1625,\n",
-      "          107,  603,  269,  719, 1626,  741,   91,   27,   93,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 116,   16,   29,   34,   17,   35,   18,   16,   29,   19,   17,   35,\n",
-      "           18,   10,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 650,  651,  652,  653,   40,  654,  655,  656,  102,  657,  658,   64,\n",
-      "          659,  660,  661,  662,  663,  664,  665,  663,  666,  667,  668,  669,\n",
-      "          661,  670,  671,  672,  673,  300,  324,  667,  674,  670,  675,  674,\n",
-      "          676,  667,  672,  673,  300,  324,  667,    7,  677,  678,  679,  680,\n",
-      "          681,  667,  657,  682,  683,  684,  661,  685,  663,  664,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  112,  113,   91,   13,   93,   10,   83,   16,  248,   18,   15,\n",
-      "           16,   13,   18,   34,  641,   15,   16,   17,   18,   19,   13,  125,\n",
-      "           10,   29,  249,  250,  113,   91,   13,   93,  251,  252,   13,  165,\n",
-      "           23,  249,  113,   91,   13,   93,  165,  116,   16,   29,   18,   16,\n",
-      "           17,   18,   13,   15,   16,   20,   18,   34,   29,   26,  229,  125,\n",
-      "          254,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  239,  856,   10,  201,   15,   16,   82,   18,  142,  242,  151,\n",
-      "         1163,  238,  608,   10,   17,   68,  142,  239,  856, 1164,  155,  584,\n",
-      "          154,  358, 1165,  228,   16,   20,   18,  142,  242,  151,  358,    4,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,   52,   63,  979,  980,   40,  981,   52,  982,  102,  983,  984,\n",
-      "           52,   64,  985,  986,   52,  530,  987,  238,  988,  989,  983,   71,\n",
-      "            3,    3,    3,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 127,  129,  355,   13,   10,   23,   26,   27,   79,   10,   29,   26,\n",
-      "           27,  131,   10,   29,  130,   13,   79,  610,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  125,   10,  126,   92,   16,   17,   18,  841,   26,  170,   10,\n",
-      "           17,   15,   16,  841,   18,   26,  162,   10,  841,   15,   16,  901,\n",
-      "           18,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1507,   65,  137,  116,   16,   13,   15,   16,   17,   18,   18,   16,\n",
-      "          125,   15,   16,   17,   18,   18,   34,  116,   16,   79,   15,   16,\n",
-      "           17,   18,   18,   16,  170,   15,   16,   17,   18,   18,   10,   29,\n",
-      "           26,   27,   91,  125,  257,  170,  257,   23,   93,  457,  116,   16,\n",
-      "          228,   16,   17,   18,   18,   16,   17,   18,   26,   68,  228,   16,\n",
-      "           17,   18,   65, 1508,  255,   65,  178,  107,  277,  141,   62,  382,\n",
-      "          356,  277,   65,  138,  267,    9,   28, 1089,  153,  466,  464,  241,\n",
-      "          107,  848,  177,  277,  177, 1509, 1185,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [2087, 1549,  125,   81,  202,  918, 2087, 1550, 1551, 1551, 1552, 1549,\n",
-      "          825, 1553, 1554, 1555, 2088, 1548, 1551, 1050, 1553, 1554,   71, 2089,\n",
-      "         1551, 1552, 1549, 1557, 1549,   71, 1551, 1552, 1549, 1557, 1549, 2090,\n",
-      "         1549, 1549, 2091, 2092,   71,  229, 1551, 1552,  544, 1549, 1549,   60,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  232,   59,  523,  524,  525,  232,  523,  157,  247,  179,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 800,   50,   59,  713,  182,  520,  231,  800, 1069,   68,  464,  691,\n",
-      "         1070,    9,  800, 1069,   68,  465,  258, 1071, 1070,   28,  800,   55,\n",
-      "          464,  465, 1072,  102, 1073, 1072,  110,    3,    3,    3,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,  643,   10,   12,   19,   17,   26,   19,   29,   26,   23,\n",
-      "           26,   29,   26,   17,   26,   20,   25,    9,   10,   12,   19,   29,\n",
-      "           26,   23,   26,   29,   25,   28,   10,   12,   29,   26,   17,   25,\n",
-      "           65,   92,   16,  643,   18,   91,    9,  644,   28,   93,   10,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 363,  151,  226,    9,   28,   65,  125,  170,  162,  114,    9,   10,\n",
-      "          116,   16,   21,   18,   16,   30,   18,  114,   65,   10,  116,   16,\n",
-      "           30,   18,   16,  729,   18,  125,  170,  179,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,    8,    9,   10,   12,   23,   26,   17,   26,   21,   26,  105,\n",
-      "           26,  134,   26,   96,   25,   26,   28,   10,   12,   21,   26,  134,\n",
-      "           25,   65,   92,   16,    9,   18,   28,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,    9,   26,   28,   26,   65,  147,   62,  148,  149,   68,  150,\n",
-      "           62,   92,   16,   29,   18,  145,  151,  152,  150,   62,   92,   16,\n",
-      "           29,   18,   53,   21,  117,  153,   10,  154,   10,  155,   10,  156,\n",
-      "           92,   16,   29,   18,   26,  157,   62,  158,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [1361,  441,  893, 1362, 1363,  710, 1364, 1365,  893,  894,  338, 1366,\n",
-      "          894, 1366, 1362, 1367,   97,  705, 1368,  530,  407, 1369, 1370,   85,\n",
-      "         1371, 1368, 1372, 1366, 1373, 1368, 1374, 1366, 1368,  893,  331, 1375,\n",
-      "           81, 1016, 1193, 1376, 1377, 1376, 1377,  554, 1366, 1362, 1378,  449,\n",
-      "          229,   97,  705, 1368,  893,  828, 1375, 1379,  171,  893, 1380, 1381,\n",
-      "          339,  171,  339,  171, 1368,  433,  997,  553,  102,  553, 1382,  556,\n",
-      "          894, 1366, 1362,  440,  450,   83,   16,  503,   18,   15,   16,   17,\n",
-      "           18,   10,  116,   16,   83,   16,  131,   18,   91,   83,   16,  539,\n",
-      "           18,   19,   83,   16,  540,   18,   93,   15,   16,   17,   18,   18,\n",
-      "           16,   91,   83,   16,  125,   18,   34,   83,   16,  170,   18,   93,\n",
-      "           91,   83,   16,  162,   18,   34,   83,    0],\n",
-      "        [ 384,   26, 1750,  138,  242,  171,  131,  359,  107,   99,  372,  171,\n",
-      "          172,  131,  171,  172,  384,  131,  717, 1750,  384,  172, 1750,  171,\n",
-      "          172,  384,  131,  717,  384,  171,  172,  131,  384,  717, 1750,  171,\n",
-      "          383,  384,  171,  717, 1750,  171, 2084,  384,  717, 1750,  171,  384,\n",
-      "         1074,  647,  131, 1750, 1074,  647, 1063,  372,  179, 2085,  387,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,  113,   91,   13,   93,   10,  114,   91,  115,   13,   34, 1738,\n",
-      "           93,  797,  798,  113,   91,   13,   93,  251,  799,  546,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  125,  294,   11,   91,   23,   26,  116,   16,  117,   18,   16,\n",
-      "           17,   18,   24,   93, 1665, 1393, 1666, 1393,  886, 1393,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  113,   91,   13,   93, 1066,   13,   22,   23,  249,  113,   91,\n",
-      "           13,   93,   10,   19,  248,   15,   16,  641,   18,  113,   91,  174,\n",
-      "           17,   93,   10,  134,    4,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  557,   63,  153,  154,   62,  153,  466,   68,  142,  154,  269,\n",
-      "         1088, 1182,  301,  239, 1485,   10,   13, 1486,  142,    9,   28,  362,\n",
-      "          358,   13,  112,  113,   91,   13,   93,   79,   10,  113,   91,   13,\n",
-      "           93,  797,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  125,   26,  170,  349,   36,  125,   34,  170,   36,   10,   29,\n",
-      "           26,   36,  125,   19,  170,   36,   10,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[  61,  112,  113,   91,   13,   93,   10,  114,   11,   91,  115,   13,\n",
-      "           34,  116,   16,  117,   18,   16,  105,   18,   24,   93,  118,   19,\n",
-      "          117,   26,  117,  119,  120,  121,  113,   91,   13,   93,  122,  123,\n",
-      "            3,    3,    3,    3,    3,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   83,   16,   79,   18,   10,   83,   16,    9,   18,  230,   91,\n",
-      "          115,   83,   16,   13,   18,   34,  796,   93,  797,  798,    3,    3,\n",
-      "            3,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,  230,   11,   91,  115,   13,\n",
-      "           34,  116,   16,  117,   18,   16,   30,   18,   24,   93,   91,  115,\n",
-      "          257,   23,   93,    7,  113,   91,   13,   93,  118,   23,   26,   17,\n",
-      "          117,  119,  380,  381,  253,  385,   99, 1062,  113,   91,   13,   93,\n",
-      "           91,   23,   26,   17,  117,   93,  380,  381, 1964,   68,  113,   91,\n",
-      "           13,   93,   91,   23,   26,   17,  117,   93,  380,  381, 2032,   68,\n",
-      "          113,   91,   13,   93,   11,   91,   23,   26,  116,   16,  117,   18,\n",
-      "           16,   96,   18,   24,   93,  251,  888,  254,   11,  118,  116,   16,\n",
-      "          298,   18,   16,   30,   18,   26,  116,   16, 2033,   18,   16,   96,\n",
-      "           18,   24,   93, 1063, 1062, 1148,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 132,   11,   12,  125,   92,   16,  131,   18,   24,   25,  102,   26,\n",
-      "           27,  125,   92,   16,   29,   18,   10,   29,   26,   27,  125,   92,\n",
-      "           16,   30,   18,   10,   21,  125,   92,   16,   20,   18,  229,   11,\n",
-      "           12,  125,   92,   16,  131,   18,   24,   25,  526,  527,  301, 1424,\n",
-      "           11,   12,  125,   92,   16,  131,   18,   24,   25,  181,  131,  183,\n",
-      "          353,   92,   16,  171,   18,   10, 1360,  229,  171,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[274, 275, 276, 102, 107, 277, 137,  27,  79,  10, 279,  27,  91, 279,\n",
-      "         572,  23,  93, 361,  79, 949,  68, 464, 361, 513,  65, 137,  27,  79,\n",
-      "          15,  16,  17,  18,  10,  17, 514,  91, 373, 257,  23,  93, 853, 142,\n",
-      "         584, 464,  68, 142, 950, 465, 951, 849, 911, 361,  65, 853, 952, 839,\n",
-      "         229, 116,  16,  36, 953,  36,  18,  16,  36, 849,  36,  18, 842, 954,\n",
-      "         952, 107, 955,  65, 289,  68, 449,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [738,   7, 112, 113,  91,  13,  93,  10,  17,  13,  15,  16,  20,  18,\n",
-      "          19, 641,  15,  16,  17,  18,  34,  17, 250, 113,  91,  13,  93, 251,\n",
-      "         252,  23,  22, 125,  22,  20, 249, 301, 113,  91,  13,  93, 546, 168,\n",
-      "         464, 111, 171, 229, 464,  19, 171, 254,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 61,  62, 140, 141, 107,  13,  10,  17, 513,  79,  15,  16,  17,  18,\n",
-      "          10,  17, 514,  91, 373, 257,  23,  93, 515,  66, 256, 362, 516, 172,\n",
-      "         517,  65, 139, 140,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0],\n",
-      "        [ 13,  79, 159,  11,  12, 160, 161,  16, 277,  18,  13,  19,  79,  34,\n",
-      "          29, 589,  23, 164,  13,  19,  17,  79, 163,  23, 164,  13,  34,  17,\n",
-      "          79,  19,  17, 163,  23, 166, 161,  24, 167,  33,  13,  79, 168, 737,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,\n",
-      "           0,   0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[   7,  178,  116,   16,   13,   15,   16,   17,   18,   18,   16,  171,\n",
-      "           15,   16,   17,   18,   34,  131,   18,   19,  116,   16,   79,   15,\n",
-      "           16,   17,   18,   18,   16,   20,  171,   15,   16,   17,   18,   19,\n",
-      "          131,   18,   10,   29,  136,  136,  220,  139, 1381,  358,  131,  254,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  169,  889,   16,  125,   18,   10,   91,   29,   26,   17,   93,\n",
-      "           26,  889,   16,  170,   18,   10,   91,   17,   26,   19,   17,   93,\n",
-      "           26,  889,   16,  162,   18,   10,   91,   29,   26, 1348,   93,  167,\n",
-      "          261,   16,   83,   16,  162,   18,   18,  469,  469,   91,   17,  261,\n",
-      "           16,   83,   16,  125,   18,   18,   34,  261,   16,   83,   16,  170,\n",
-      "           18,   18,   93, 1348,   10,    4,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 301,  353,   92,   16,  131,   18,  370,   11,   12,  125,   92,   16,\n",
-      "          131,   18,   24,   25,  181,  131,  183,    7,  353,   92,   16,   21,\n",
-      "           18,   10,   23,  584,  125,   92,   16,   30,   18,   10,   30,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  145,  956,  957,  669,  239,   83,   16,  958,   18,   10,  819,\n",
-      "           15,   16,   82,   18,   62,  234,  854,  523,  959,  241,  107,  153,\n",
-      "          150,   62,  357,   68,   65,  584,   66,  150,   62,    9,  584,   28,\n",
-      "          584,   65,  584,   66,  960,  961,  241,   83,   16,  153,   18,  469,\n",
-      "          469,   83,   16,  269,   18,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 250,  112,  113,   91,   13,   93,   10,  116,   16,   13,   19,   17,\n",
-      "           18,   16,   13,   34,   17,   18,  248,   15,   16,   13,   18,  251,\n",
-      "          252,  241,   13,  962,   23,  249,   91,   13,   19,   17,   93,  248,\n",
-      "           15,   16,   13,   18,   34,   13,   34,   17,  257,   23,  241,  125,\n",
-      "          294,  118,   23,   26,   29,   93,  249,  112,  477,   91,   13,   93,\n",
-      "           10,  116,   16,  248,   15,   16,   13,   18,   19,  641,   19,  125,\n",
-      "           18,   16,   13,   15,   16,   17,   18,   18,   27,   91,   13,  257,\n",
-      "           23,   93,  111,   61,  477,   91,   13,   93,  111, 1758,   91,  125,\n",
-      "           93, 2093, 1758,   91,  125,   93, 1531,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [  61,  112,  113,   91,   13,   93,   10,   13,   15,   16,   20,   18,\n",
-      "           19,  116,   16,   29,   18,   16,   13,   15,   16,   20,   18,   18,\n",
-      "           26,  113,   91,   13,   93,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,  125,  170,  349,  125,  170,  162,   10,   17,  125,   19,  228,\n",
-      "           16,   30,   18,  170,  114,   22,  889,   16,  125,   18,   26,  889,\n",
-      "           16,  162,   18,  257,   10, 2034,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [   7,    8,    9,   10,   12,   13,   36,   13,   22,   17,   25,   28,\n",
-      "           10,   12,   13,   36,   20,   19,   17,   13,  257,   23,   25,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 231,   68,  465,   52,   63,   64,  363, 1413,  236,  242, 1413,  172,\n",
-      "          242,   63,   26,  464, 1089,  561,  466,    4,    3,    3,    3,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 145,  151,  226,    9,   28,   65, 2184,  125,  170,  162,  170,   10,\n",
-      "          105,   26,  125,   10,   17,  162,   26,   28,   10,  116,   16,  117,\n",
-      "           18,   16,   20,   18,  145,  151,   53,  179,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  764, 1224,  829, 1225,  829, 1226,  707, 1227, 1228,   81, 1229,\n",
-      "         1230, 1231, 1232, 1233,  822, 1232, 1224,  822, 1225, 1234, 1235,   90,\n",
-      "          164, 1236,   16,   35,   15,   16,   79,   16,   35, 1237,  164, 1236,\n",
-      "           16,   35,   15,   16,  279,   16,   35,   79,   16,   35, 1238,  164,\n",
-      "         1239,   16,  164, 1236,   16,   35,   15,   16,  164, 1240,   79,   16,\n",
-      "           35,  164, 1241,   16,   79,  164,   15,   16, 1242,  164, 1239,   16,\n",
-      "          164, 1243, 1244, 1235,  527,  434,  451,   10,  116,   16,  424,   92,\n",
-      "           16,   35,   10,   29,   18,   15,   16,  131,   18,   11,   91,  279,\n",
-      "           92,   16,   35,   18,   19,  425,   16,  279,   18,   24,   93,   11,\n",
-      "           91,   79,   92,   16,   35,   18,   19,  425,   16,   79,   18,   24,\n",
-      "           93,   18,   16,  228,   16,  424,   92,    0],\n",
-      "        [ 518,  519,  520,  519,  158,    3,    3,    3,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "RuntimeError: Expected object of device type cuda but got device type cpu for argument #1 'self' in call to _th_index_select\n",
-      "[DEBUG]Sample idx: tensor([[ 274,  275,  276,  102,  173,   65,  273,  178,   11,   12,  160,  161,\n",
-      "           16,  277,   18,   13,   10,   17,  114,  288,  164,   79,   10,   21,\n",
-      "          230,  288,  166,  161,   24,  167,  288,  164,  273,  107,  277,  273,\n",
-      "          178,   11,   12,  160,  161,   16,  277,   18,   13,   10,   29,   34,\n",
-      "          279,  114,  384,  164,   79,   10,   17,   34,  279,  230,  384,  166,\n",
-      "          161,   24,  167,  279,  273,  229,   65,  277,  274,  178,  173,   65,\n",
-      "         1646,  107,  277,  877, 1089,  466,  140,  229,  277,  177,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 521,  125,   10,  116,   16,   20,   18,   16,   21,   18,  114,   15,\n",
-      "           16,   17,   18,  125,   34,   17,  230,   17,  125,   10,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 231,  153,  852,   62,  604,  155,  852,   62,  176,  154,  361,  852,\n",
-      "           62,  853,  256,   66,  155,  466,  241,  560,  852,   62,  176,   83,\n",
-      "           16,  854,   18,   10,  228,   16,   20,   18,   83,   16,  855,   18,\n",
-      "          229,  818,  856,  857,    3,    3,    3,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0],\n",
-      "        [ 112,   79,   10,   29,   34,   13,   34,  116,   16,  230,   13,   18,\n",
-      "           16,   13,   15,   16,   17,   18,   18,  797,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,\n",
-      "            0,    0,    0,    0,    0,    0,    0,    0]], device='cuda:0')\n",
-      "Train time:  5.155178070068359\n"
+      "\n",
+      "\n",
+      "Training completed. Do not forget to share your model on huggingface.co/models =)\n",
+      "\n",
+      "\n",
+      "Saving model checkpoint to ../../data/pretrain_test_models/elmo/\n",
+      "Trainer.model is not a `PreTrainedModel`, only saving its state dict.\n",
+      "Configuration saved in ../../data/pretrain_test_models/elmo/config.json\n"
      ]
     },
     {
      "data": {
       "text/plain": [
-       "'../../examples/test_model/elmo'"
+       "'../../data/pretrain_test_models/elmo/'"
       ]
      },
-     "execution_count": 4,
+     "execution_count": 8,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -8964,15 +182,23 @@
    "source": [
     "# 自定义训练参数\n",
     "train_params = {\n",
-    "  \"emb_dim\": 128,\n",
-    "  \"hid_dim\": 256,\n",
-    "  \"batch_size\": 4,\n",
-    "  \"epochs\": 1,\n",
-    "  \"lr\": 5e-3,\n",
-    "  \"device\": None\n",
+    "  # \"emb_dim\": 128,\n",
+    "  # \"hid_dim\": 256,\n",
+    "  # \"batch_size\": 4,\n",
+    "  # \"epochs\": 1,\n",
+    "  # \"lr\": 5e-3,\n",
+    "  # \"device\": None,\n",
+    "  \n",
+    "  \"num_train_epochs\": 1,\n",
+    "  \"per_device_train_batch_size\": 8,\n",
+    "  \"save_steps\": 50,\n",
+    "  \"save_total_limit\": 2,\n",
+    "  \"logging_steps\": 5,\n",
+    "  \"gradient_accumulation_steps\": 1,\n",
+    "  \"learning_rate\": 5e-4,\n",
     "}\n",
     "\n",
-    "train_elmo(train_items, output_dir, **train_params)"
+    "train_elmo(train_items, output_dir, train_params=train_params)"
    ]
   },
   {
@@ -8983,156 +209,277 @@
     "## 3.使用模型"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "test_items = [\n",
+    "    {'ques_content': '有公式$\\\\FormFigureID{wrong1?}$和公式$\\\\FormFigureBase64{wrong2?}$，\\\n",
+    "            如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\\\n",
+    "            若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'},\n",
+    "    {'ques_content': '如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \\\n",
+    "            若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'}\n",
+    "]"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### 3.1使用训练好的Elmo模型"
+    "### 3.1 直接加载令牌容器和模型"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
-     "name": "stdout",
+     "name": "stderr",
      "output_type": "stream",
      "text": [
-      "torch.Size([512])\n",
-      "torch.Size([15, 512])\n",
-      "torch.Size([2, 512])\n",
-      "torch.Size([2, 25, 512])\n"
+      "Model config PretrainedConfig {\n",
+      "  \"architecture\": \"ElmoLM\",\n",
+      "  \"batch_first\": true,\n",
+      "  \"dropout_rate\": 0.5,\n",
+      "  \"embedding_dim\": 300,\n",
+      "  \"hidden_size\": 300,\n",
+      "  \"num_layers\": 2,\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"use_pack_pad\": false,\n",
+      "  \"vocab_size\": 305\n",
+      "}\n",
+      "\n",
+      "[EduNLP, INFO] All the weights of ElmoLM were initialized from the model checkpoint at ../../data/pretrain_test_models/elmo/.\n",
+      "If your task is similar to the task the model of the checkpoint was trained on, you can already use ElmoLM for predictions without further training.\n"
      ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "ElmoLMOutput([('pred_forward',\n",
+       "               tensor([[[0.0033, 0.0032, 0.0034,  ..., 0.0033, 0.0031, 0.0035],\n",
+       "                        [0.0032, 0.0032, 0.0035,  ..., 0.0033, 0.0031, 0.0033],\n",
+       "                        [0.0035, 0.0031, 0.0034,  ..., 0.0032, 0.0033, 0.0033],\n",
+       "                        ...,\n",
+       "                        [0.0032, 0.0032, 0.0036,  ..., 0.0030, 0.0031, 0.0033],\n",
+       "                        [0.0034, 0.0032, 0.0035,  ..., 0.0032, 0.0031, 0.0035],\n",
+       "                        [0.0034, 0.0031, 0.0032,  ..., 0.0033, 0.0031, 0.0033]],\n",
+       "               \n",
+       "                       [[0.0034, 0.0030, 0.0034,  ..., 0.0033, 0.0032, 0.0034],\n",
+       "                        [0.0035, 0.0031, 0.0037,  ..., 0.0031, 0.0031, 0.0035],\n",
+       "                        [0.0035, 0.0030, 0.0034,  ..., 0.0031, 0.0033, 0.0035],\n",
+       "                        ...,\n",
+       "                        [0.0032, 0.0032, 0.0032,  ..., 0.0032, 0.0032, 0.0034],\n",
+       "                        [0.0034, 0.0030, 0.0033,  ..., 0.0033, 0.0030, 0.0033],\n",
+       "                        [0.0035, 0.0032, 0.0032,  ..., 0.0032, 0.0030, 0.0032]]],\n",
+       "                      grad_fn=<SoftmaxBackward>)),\n",
+       "              ('pred_backward',\n",
+       "               tensor([[[0.0032, 0.0029, 0.0033,  ..., 0.0030, 0.0028, 0.0033],\n",
+       "                        [0.0032, 0.0031, 0.0034,  ..., 0.0031, 0.0029, 0.0033],\n",
+       "                        [0.0032, 0.0031, 0.0034,  ..., 0.0031, 0.0030, 0.0035],\n",
+       "                        ...,\n",
+       "                        [0.0031, 0.0032, 0.0034,  ..., 0.0032, 0.0031, 0.0034],\n",
+       "                        [0.0034, 0.0033, 0.0035,  ..., 0.0031, 0.0030, 0.0034],\n",
+       "                        [0.0034, 0.0032, 0.0036,  ..., 0.0033, 0.0030, 0.0035]],\n",
+       "               \n",
+       "                       [[0.0033, 0.0032, 0.0036,  ..., 0.0031, 0.0029, 0.0033],\n",
+       "                        [0.0033, 0.0031, 0.0035,  ..., 0.0031, 0.0031, 0.0033],\n",
+       "                        [0.0034, 0.0031, 0.0033,  ..., 0.0030, 0.0031, 0.0032],\n",
+       "                        ...,\n",
+       "                        [0.0033, 0.0032, 0.0034,  ..., 0.0030, 0.0031, 0.0034],\n",
+       "                        [0.0033, 0.0034, 0.0032,  ..., 0.0032, 0.0030, 0.0033],\n",
+       "                        [0.0034, 0.0033, 0.0033,  ..., 0.0032, 0.0032, 0.0033]]],\n",
+       "                      grad_fn=<SoftmaxBackward>)),\n",
+       "              ('forward_output',\n",
+       "               tensor([[[-0.0528, -0.0000,  0.0000,  ..., -0.0000, -0.0000, -0.1094],\n",
+       "                        [-0.0555, -0.0000,  0.1578,  ..., -0.1109, -0.0000, -0.1539],\n",
+       "                        [-0.0000, -0.0000,  0.1170,  ..., -0.1780, -0.0090, -0.0000],\n",
+       "                        ...,\n",
+       "                        [-0.0000, -0.0493,  0.0206,  ...,  0.0145, -0.0501, -0.0000],\n",
+       "                        [-0.0000, -0.0000, -0.0088,  ..., -0.0000, -0.0375,  0.0128],\n",
+       "                        [-0.0412, -0.1187,  0.0000,  ..., -0.0000,  0.0000,  0.0386]],\n",
+       "               \n",
+       "                       [[ 0.0173, -0.0000, -0.0000,  ..., -0.0000,  0.0000,  0.0000],\n",
+       "                        [ 0.0000, -0.1261, -0.0141,  ..., -0.0000,  0.0211,  0.0752],\n",
+       "                        [ 0.0000, -0.1159, -0.0309,  ..., -0.1112, -0.0282,  0.0501],\n",
+       "                        ...,\n",
+       "                        [-0.0000, -0.1322,  0.0000,  ..., -0.0242,  0.0000,  0.0000],\n",
+       "                        [ 0.0000, -0.0000,  0.0000,  ...,  0.0000,  0.0492,  0.0000],\n",
+       "                        [ 0.0000, -0.2027,  0.1891,  ...,  0.0292,  0.0457, -0.0000]]],\n",
+       "                      grad_fn=<MulBackward0>)),\n",
+       "              ('backward_output',\n",
+       "               tensor([[[ 0.1090, -0.1446,  0.0000,  ..., -0.0652,  0.0701, -0.0444],\n",
+       "                        [ 0.0911, -0.1078,  0.0514,  ..., -0.0000,  0.0735,  0.0000],\n",
+       "                        [ 0.0000, -0.0000,  0.0000,  ..., -0.0463,  0.0000,  0.0000],\n",
+       "                        ...,\n",
+       "                        [-0.0984, -0.0927,  0.1122,  ...,  0.0556,  0.0000, -0.0028],\n",
+       "                        [-0.0000, -0.0939,  0.0403,  ...,  0.0000,  0.0629, -0.0146],\n",
+       "                        [-0.0000, -0.0779,  0.0000,  ..., -0.0000,  0.0000, -0.0187]],\n",
+       "               \n",
+       "                       [[-0.0000, -0.0000,  0.0000,  ..., -0.0000,  0.0062,  0.0000],\n",
+       "                        [-0.0000, -0.0482,  0.0000,  ..., -0.0000, -0.0000,  0.0713],\n",
+       "                        [-0.0000, -0.1221,  0.0000,  ..., -0.0000, -0.0000,  0.1571],\n",
+       "                        ...,\n",
+       "                        [ 0.0640, -0.1978,  0.0387,  ..., -0.0000,  0.1457, -0.0000],\n",
+       "                        [ 0.1365, -0.2237,  0.0940,  ..., -0.1624,  0.0000, -0.0368],\n",
+       "                        [ 0.1113, -0.0000,  0.0000,  ..., -0.1166,  0.0000, -0.0000]]],\n",
+       "                      grad_fn=<MulBackward0>))])"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
     }
    ],
    "source": [
-    "item = [\n",
-    "        {'stem': '如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \\\n",
-    "        若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'},\n",
-    "        {'stem': '已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为'}\n",
-    "]\n",
+    "pretrained_model_dir = output_dir\n",
     "\n",
-    "tokenizer_kwargs = {\"path\": os.path.join(output_dir, \"vocab.json\")}\n",
-    "i2v = Elmo('elmo', 'elmo', output_dir, tokenizer_kwargs=tokenizer_kwargs)\n",
+    "model = ElmoLM.from_pretrained(pretrained_model_dir)\n",
+    "tokenizer = ElmoTokenizer.from_pretrained(pretrained_model_dir)\n",
     "\n",
-    "# 可以对单个题目进行表征\n",
-    "i_vec, t_vec = i2v(item[0]['stem'])\n",
-    "print(i_vec.shape) # == torch.Size([x])\n",
-    "print(t_vec.shape) # == torch.Size([x, x])\n",
-    "\n",
-    "# 也可以对题目列表进行表征\n",
-    "i_vec, t_vec = i2v([ item[0]['stem'], item[1]['stem'] ])\n",
-    "print(i_vec.shape) # == torch.Size([2, x])\n",
-    "print(t_vec.shape) # == torch.Size([2, x, x]))\n"
+    "encodes = tokenizer(test_items, lambda x: x['ques_content'])\n",
+    "model(**encodes)"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### 3.2使用Elmo Tokenizer"
+    "### 3.2 使用I2V向量化"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
-     "name": "stdout",
+     "name": "stderr",
      "output_type": "stream",
      "text": [
-      "([527, 231, 3, 13, 26, 79, 159, 527, 6, 33, 10, 13, 34, 133, 79, 168, 4], 17)\n",
+      "Model config PretrainedConfig {\n",
+      "  \"architecture\": \"ElmoLM\",\n",
+      "  \"batch_first\": true,\n",
+      "  \"dropout_rate\": 0.5,\n",
+      "  \"embedding_dim\": 300,\n",
+      "  \"hidden_size\": 300,\n",
+      "  \"num_layers\": 2,\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"use_pack_pad\": false,\n",
+      "  \"vocab_size\": 305\n",
+      "}\n",
       "\n",
-      "([[527, 231, 3, 13, 26, 79, 159, 527, 6, 33, 10, 13, 34, 133, 79, 168, 4], [7, 104, 13, 15, 16, 17, 18, 34, 79, 15, 16, 17, 18, 19, 105, 13, 10, 23, 106, 107, 104, 108, 109, 110, 111]], [17, 25])\n",
-      "\n"
+      "[EduNLP, INFO] All the weights of ElmoLM were initialized from the model checkpoint at ../../data/pretrain_test_models/elmo/.\n",
+      "If your task is similar to the task the model of the checkpoint was trained on, you can already use ElmoLM for predictions without further training.\n",
+      "/home/qlh/EduNLP/EduNLP/Vector/elmo_vec.py:36: UserWarning: To copy construct from a tensor, it is recommended to use sourceTensor.clone().detach() or sourceTensor.clone().detach().requires_grad_(True), rather than torch.tensor(sourceTensor).\n",
+      "  (outputs.forward_output[torch.arange(len(items[\"seq_len\"])), torch.tensor(items[\"seq_len\"]) - 1],\n"
      ]
-    }
-   ],
-   "source": [
-    "# 加载之前训练的模型tokenizer\n",
-    "tokenizer = ElmoTokenizer(os.path.join(output_dir, \"vocab.json\"))\n",
-    "\n",
-    "# 对题目文本进行令牌化\n",
-    "items = [\n",
-    "    \"有公式$\\\\FormFigureID{wrong1?}$，如图$\\\\FigureID{088f15ea-xxx}$,\\\n",
-    "    若$x,y$满足约束条件公式$\\\\FormFigureBase64{wrong2?}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\",\n",
-    "    \"已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为\"\n",
-    "]\n",
-    "# 可以对单个题目进行令牌化\n",
-    "print(tokenizer(items[0], freeze_vocab=True))\n",
-    "print()\n",
-    "\n",
-    "# 也可以对题目列表进行令牌化\n",
-    "print(tokenizer(items, freeze_vocab=True))\n",
-    "print()\n",
-    "\n"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 7,
-   "metadata": {},
-   "outputs": [
+    },
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']\n",
-      "[['公式', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]'], ['已知', '圆', 'x', '^', '{', '2', '}', '+', 'y', '^', '{', '2', '}', '-', '6', 'x', '=', '0', '过点', '直线', '圆', '截得', '弦', '长度', '最小值']]\n"
+      "torch.Size([1, 600])\n",
+      "torch.Size([1, 15, 600])\n",
+      "torch.Size([2, 600])\n",
+      "torch.Size([2, 25, 600])\n"
      ]
     }
    ],
    "source": [
-    "# 可以使用tokenize方法查看令牌化后的文本\n",
-    "print(tokenizer.tokenize(items[0], freeze_vocab=True))\n",
-    "print(tokenizer.tokenize(items, freeze_vocab=True))"
+    "tokenizer_kwargs = {\"tokenizer_config_dir\": pretrained_model_dir}\n",
+    "i2v = Elmo('elmo', 'elmo', output_dir, tokenizer_kwargs=tokenizer_kwargs)\n",
+    "\n",
+    "# 可以对单个题目进行表征\n",
+    "i_vec, t_vec = i2v(test_items[0], key=lambda x: x[\"ques_content\"])\n",
+    "print(i_vec.shape) # == torch.Size([x])\n",
+    "print(t_vec.shape) # == torch.Size([x, x])\n",
+    "\n",
+    "# 也可以对题目列表进行表征\n",
+    "i_vec, t_vec = i2v(test_items, key=lambda x: x[\"ques_content\"])\n",
+    "print(i_vec.shape) # == torch.Size([2, x])\n",
+    "print(t_vec.shape) # == torch.Size([2, x, x]))\n"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### 3.3使用EduNLP中公开的预训练模型"
+    "### 3.3 使用Tokenizer和T2V向量化"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [
     {
      "name": "stderr",
      "output_type": "stream",
      "text": [
-      "EduNLP, INFO model_path: ..\\..\\examples\\test_model\\elmo\\elmo_test\n",
-      "EduNLP, INFO Use pretrained t2v model elmo_test\n",
-      "downloader, INFO http://base.ustc.edu.cn/data/model_zoo/modelhub/elmo_pub/1/elmo_test.zip is saved as ..\\..\\examples\\test_model\\elmo\\elmo_test.zip\n"
-     ]
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Downloading ..\\..\\examples\\test_model\\elmo\\elmo_test.zip 100.00%: 402KB | 402KB"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "downloader, INFO ..\\..\\examples\\test_model\\elmo\\elmo_test.zip is unzip to ..\\..\\examples\\test_model\\elmo\\elmo_test\n"
+      "Model config PretrainedConfig {\n",
+      "  \"architecture\": \"ElmoLM\",\n",
+      "  \"batch_first\": true,\n",
+      "  \"dropout_rate\": 0.5,\n",
+      "  \"embedding_dim\": 300,\n",
+      "  \"hidden_size\": 300,\n",
+      "  \"num_layers\": 2,\n",
+      "  \"transformers_version\": \"4.18.0\",\n",
+      "  \"use_pack_pad\": false,\n",
+      "  \"vocab_size\": 305\n",
+      "}\n",
+      "\n",
+      "[EduNLP, INFO] All the weights of ElmoLM were initialized from the model checkpoint at ../../data/pretrain_test_models/elmo/.\n",
+      "If your task is similar to the task the model of the checkpoint was trained on, you can already use ElmoLM for predictions without further training.\n",
+      "/home/qlh/EduNLP/EduNLP/Vector/elmo_vec.py:36: UserWarning: To copy construct from a tensor, it is recommended to use sourceTensor.clone().detach() or sourceTensor.clone().detach().requires_grad_(True), rather than torch.tensor(sourceTensor).\n",
+      "  (outputs.forward_output[torch.arange(len(items[\"seq_len\"])), torch.tensor(items[\"seq_len\"]) - 1],\n"
      ]
     },
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
+      "torch.Size([2, 600])\n",
+      "\n",
+      "torch.Size([2, 600])\n",
+      "torch.Size([2, 25, 600])\n",
       "\n"
      ]
     }
    ],
+   "source": [
+    "# 加载之前训练的模型tokenizer\n",
+    "tokenizer = ElmoTokenizer.from_pretrained(pretrained_model_dir)\n",
+    "encodes = tokenizer(test_items, key=lambda x: x['ques_content'])\n",
+    "\n",
+    "t2v = ElmoModel(pretrained_model_dir)\n",
+    "\n",
+    "i_vec = t2v(encodes)\n",
+    "print(i_vec.shape) # == torch.Size([2, x])\n",
+    "print()\n",
+    "\n",
+    "i_vec = t2v.infer_vector(encodes)\n",
+    "t_vec = t2v.infer_tokens(encodes)\n",
+    "print(i_vec.shape) # == torch.Size([2, x])\n",
+    "print(t_vec.shape) # == torch.Size([2, x, x]))\n",
+    "print()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### 3.4 使用EduNLP中公开的预训练模型"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
    "source": [
     "# 获取公开的预训练模型\n",
     "pretrained_dir = f\"{BASE_DIR}/examples/test_model/elmo\"\n",
@@ -9141,55 +488,32 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "torch.Size([2, 64])\n",
-      "torch.Size([2, 25, 64])\n",
-      "\n",
-      "torch.Size([2, 64])\n",
-      "torch.Size([2, 25, 64])\n",
-      "\n",
-      "torch.Size([64])\n",
-      "torch.Size([17, 64])\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
-    "items = [\n",
-    "    \"有公式$\\\\FormFigureID{wrong1?}$，如图$\\\\FigureID{088f15ea-xxx}$,\\\n",
-    "    若$x,y$满足约束条件公式$\\\\FormFigureBase64{wrong2?}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\",\n",
-    "    \"已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为\"\n",
-    "]\n",
-    "i_vec, t_vec = i2v(items)\n",
+    "i_vec, t_vec = i2v(test_items)\n",
     "print(i_vec.shape)\n",
     "print(t_vec.shape)\n",
     "print()\n",
     "\n",
     "# 也可以单独获取题目表征和各个token的表征\n",
-    "i_vec = i2v.infer_item_vector(items)\n",
+    "i_vec = i2v.infer_item_vector(test_items, key=lambda x: x['ques_content'])\n",
     "print(i_vec.shape)\n",
-    "t_vec = i2v.infer_token_vector(items)\n",
+    "t_vec = i2v.infer_token_vector(test_items, key=lambda x: x['ques_content'])\n",
     "print(t_vec.shape)\n",
     "print()\n",
     "\n",
     "# 同样，可以获取单个题目的表征\n",
-    "i_vec, t_vec = i2v(items[0])\n",
+    "i_vec, t_vec = i2v(test_items[0], key=lambda x: x['ques_content'])\n",
     "print(i_vec.shape)\n",
     "print(t_vec.shape)"
    ]
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "2a09bcfc86f5d80d5adfb774779878f28f4d48d5a6d6c0020bcfd8afaf909ec6"
-  },
   "kernelspec": {
-   "display_name": "Python 3.6.13 ('data')",
+   "display_name": "Python 3.8.13 ('nlp')",
    "language": "python",
    "name": "python3"
   },
@@ -9203,9 +527,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.8.13"
   },
-  "orig_nbformat": 4
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "cc3e3b0a667322a868bdd200d76d82ed50310f7037715f6f0bc4c373c1c03ce5"
+   }
+  }
  },
  "nbformat": 4,
  "nbformat_minor": 2
diff --git a/examples/pretrain/hugginface_tokenizer.ipynb b/examples/pretrain/hugginface_tokenizer.ipynb
new file mode 100644
index 00000000..bd426390
--- /dev/null
+++ b/examples/pretrain/hugginface_tokenizer.ipynb
@@ -0,0 +1,361 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "/data/qlh/anaconda3/envs/py36/lib/python3.6/site-packages/gensim/similarities/__init__.py:15: UserWarning: The gensim.similarities.levenshtein submodule is disabled, because the optional Levenshtein package <https://pypi.org/project/python-Levenshtein/> is unavailable. Install Levenhstein (e.g. `pip install python-Levenshtein`) to suppress this warning.\n",
+      "  warnings.warn(msg)\n"
+     ]
+    }
+   ],
+   "source": [
+    "from EduNLP.Pretrain import TokenizerForHuggingface"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Huggingface通用化接口"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "tokenizer = TokenizerForHuggingface(\"bert-base-chinese\", add_specials=True, tokenize_method=\"ast_formula\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 基础用法"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "Dump cache file failed.\n",
+      "Traceback (most recent call last):\n",
+      "  File \"/data/qlh/anaconda3/envs/py36/lib/python3.6/site-packages/jieba/__init__.py\", line 154, in initialize\n",
+      "    _replace_file(fpath, cache_file)\n",
+      "PermissionError: [Errno 1] Operation not permitted: '/tmp/tmpgu196tfc' -> '/tmp/jieba.cache'\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['公', '式', '[FORMULA]', '公', '式', '[FORMULA]', '如', '图', '[FIGURE]', 'ma', '##th', '##or', '##d', '_', '0', ',', 'ma', '##th', '##or', '##d', '_', '1', '约', '束', '条', '件', '[SEP]', 'ma', '##th', '##or', '##d', '_', '2', '=', 'ma', '##th', '##or', '##d', '_', '0', '+', 'text', '##or', '##d', 'ma', '##th', '##or', '##d', '_', '1', '最', '大', '值', '[MARK]']\n",
+      "{'input_ids': tensor([[  101,  1062,  2466, 21129,  1062,  2466, 21129,  1963,  1745, 21130,\n",
+      "          9622,  8414,  8372,  8168,   142,   121,   117,  9622,  8414,  8372,\n",
+      "          8168,   142,   122,  5276,  3338,  3340,   816,   102,  9622,  8414,\n",
+      "          8372,  8168,   142,   123,   134,  9622,  8414,  8372,  8168,   142,\n",
+      "           121,   116, 10539,  8372,  8168,  9622,  8414,  8372,  8168,   142,\n",
+      "           122,  3297,  1920,   966, 21131,   102]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n",
+      "         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n",
+      "         0, 0, 0, 0, 0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\n",
+      "         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\n",
+      "         1, 1, 1, 1, 1, 1, 1, 1]])}\n"
+     ]
+    }
+   ],
+   "source": [
+    "text = '有公式$\\\\FormFigureID{wrong1?}$和公式$\\\\FormFigureBase64{wrong2?}$，\\\n",
+    "                    如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\\\n",
+    "                    若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'\n",
+    "\n",
+    "tokens = tokenizer.tokenize(text)\n",
+    "print(tokens)\n",
+    "\n",
+    "\n",
+    "encodes = tokenizer(text)\n",
+    "print(encodes)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 分词"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['公', '式', '[FORMULA]', '公', '式', '[FORMULA]', '如', '图', '[FIGURE]', 'ma', '##th', '##or', '##d', '_', '0', ',', 'ma', '##th', '##or', '##d', '_', '1', '约', '束', '条', '件', '[SEP]', 'ma', '##th', '##or', '##d', '_', '2', '=', 'ma', '##th', '##or', '##d', '_', '0', '+', 'text', '##or', '##d', 'ma', '##th', '##or', '##d', '_', '1', '最', '大', '值', '[MARK]']\n",
+      "\n",
+      "公式 [FORMULA] 公式 [FORMULA] 如图 [FIGURE] mathord_0 , mathord_1 约束条件 [SEP] mathord_2 = mathord_0 + textord mathord_1 最大值 [MARK]\n",
+      "['公', '式', '[FORMULA]', '公', '式', '[FORMULA]', '如', '图', '[FIGURE]', 'ma', '##th', '##or', '##d', '_', '0', ',', 'ma', '##th', '##or', '##d', '_', '1', '约', '束', '条', '件', '[SEP]', 'ma', '##th', '##or', '##d', '_', '2', '=', 'ma', '##th', '##or', '##d', '_', '0', '+', 'text', '##or', '##d', 'ma', '##th', '##or', '##d', '_', '1', '最', '大', '值', '[MARK]']\n"
+     ]
+    }
+   ],
+   "source": [
+    "tokens = tokenizer.tokenize(text)\n",
+    "print(tokens)\n",
+    "print()\n",
+    "\n",
+    "# 等价于如下操作\n",
+    "pre_tokens = tokenizer._pre_tokenize(text)\n",
+    "print(pre_tokens)\n",
+    "tokens = tokenizer.bert_tokenizer.tokenize(pre_tokens)\n",
+    "print(tokens)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[101, 21130, 102]\n",
+      "[CLS] [FIGURE] [SEP]\n"
+     ]
+    }
+   ],
+   "source": [
+    "encode_idxs = tokenizer.encode(\"[FIGURE]\")\n",
+    "print(encode_idxs)\n",
+    "\n",
+    "encode_tokens = tokenizer.decode(encode_idxs)\n",
+    "print(encode_tokens)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 扩充词表"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### 直接新增单词"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['[python]', 'is', 'a', 'co', '##ding', 'language']"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tokenizer.add_tokens([\"[python]\"])\n",
+    "tokenizer.bert_tokenizer.tokenize(\"[python] is a coding language\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'[FIGURE]', '[FORMULA_END]', '[FORMULA]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[TEXT]', '[', 'n', '[TAG]', 'e', ']', 'w', '[FORMULA_BEGIN]', '[MARK]'}\n",
+      "\n",
+      "{'[FIGURE]', '[FORMULA_END]', '[FORMULA]', '[new]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[TEXT]', '[', 'n', '[TAG]', 'e', ']', 'w', '[FORMULA_BEGIN]', '[MARK]'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(tokenizer._special_tokens)\n",
+    "print()\n",
+    "\n",
+    "tokenizer.add_specials([\"[new]\"])\n",
+    "print(tokenizer._special_tokens)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### 批量设置语料库词表\n",
+    "\n",
+    "1. 根据原始文本更新词表"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['公式', '[FORMULA]', '如图', '[FIGURE]', 'mathord_0', ',', 'mathord_1', '约束条件', '[SEP]', 'mathord_2', '=', '+', 'textord', '最大值', '[MARK]']\n",
+      "8\n"
+     ]
+    }
+   ],
+   "source": [
+    "vocab_sentences = [\n",
+    "   '有公式$\\\\FormFigureID{wrong1?}$和公式$\\\\FormFigureBase64{wrong2?}$，如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, 若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'\n",
+    "]\n",
+    "\n",
+    "remain_tokens, added_num = tokenizer.set_vocab(vocab_sentences, lower=False, trim_min_count=1, do_tokenize=True)\n",
+    "\n",
+    "print(remain_tokens)\n",
+    "print(added_num)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "1. 根据分词序列更新词表"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['公式', '[FORMULA]', '如图', '[FIGURE]', 'mathord_0', ',', 'mathord_1', '约束条件', '[SEP]', 'mathord_2', '=', '+', 'textord', '最大值', '[MARK]']\n",
+      "0\n"
+     ]
+    }
+   ],
+   "source": [
+    "vocab_tokens = [\n",
+    "   ['公式', '[FORMULA]', '公式', '[FORMULA]', '如图', '[FIGURE]', 'mathord_0', ',', 'mathord_1', '约束条件', '[SEP]', 'mathord_2', '=', 'mathord_0', '+', 'textord', 'mathord_1', '最大值', '[MARK]']\n",
+    "]\n",
+    "\n",
+    "remain_tokens, added_num = tokenizer.set_vocab(vocab_tokens, lower=False, trim_min_count=1, do_tokenize=False)\n",
+    "\n",
+    "print(remain_tokens)\n",
+    "print(added_num)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'input_ids': tensor([[  101, 21139,   102]]), 'token_type_ids': tensor([[0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1]])}"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tokenizer(\"公式\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'input_ids': tensor([[ 101, 1062, 2466,  102]]), 'token_type_ids': tensor([[0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1]])}"
+      ]
+     },
+     "execution_count": 12,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "tokenizer(\"公 式\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 保存与加载"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 保存\n",
+    "save_dir = \"./tmp\"\n",
+    "tokenizer.save_pretrained(save_dir)\n",
+    "\n",
+    "# 加载\n",
+    "tokenizer = TokenizerForHuggingface.from_pretrained(save_dir)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3.6.13 ('py36')",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.13"
+  },
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "672c49ef5d0c797ca83477c465883c954b68a3ad2765b748855bc549ed895b7b"
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/examples/pretrain/prepare_dataset.ipynb b/examples/pretrain/prepare_dataset.ipynb
index 3fe97870..854452c8 100644
--- a/examples/pretrain/prepare_dataset.ipynb
+++ b/examples/pretrain/prepare_dataset.ipynb
@@ -45,11 +45,9 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "e7370f93d1d0cde622a1f8e1c04877d8463912d04d973331ad4851f04de6915a"
-  },
   "kernelspec": {
-   "display_name": "Python 3.8.5 64-bit",
+   "display_name": "Python 3.10.4 64-bit",
+   "language": "python",
    "name": "python3"
   },
   "language_info": {
@@ -62,7 +60,12 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.10.4"
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
   }
  },
  "nbformat": 4,
diff --git a/examples/pretrain/pretrained_tokenizer.ipynb b/examples/pretrain/pretrained_tokenizer.ipynb
new file mode 100644
index 00000000..b56d14b5
--- /dev/null
+++ b/examples/pretrain/pretrained_tokenizer.ipynb
@@ -0,0 +1,602 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "/data/qlh/anaconda3/envs/py36/lib/python3.6/site-packages/gensim/similarities/__init__.py:15: UserWarning: The gensim.similarities.levenshtein submodule is disabled, because the optional Levenshtein package <https://pypi.org/project/python-Levenshtein/> is unavailable. Install Levenhstein (e.g. `pip install python-Levenshtein`) to suppress this warning.\n",
+      "  warnings.warn(msg)\n"
+     ]
+    }
+   ],
+   "source": [
+    "from EduNLP.Pretrain import PretrainedEduTokenizer, EduDataset\n",
+    "import os\n",
+    "import json\n",
+    "\n",
+    "\n",
+    "BASE_DIR = \"../..\"\n",
+    "data_dir = f\"{BASE_DIR}/static/test_data\"\n",
+    "output_dir = f\"{BASE_DIR}/data/pretrain_test_models/pretrain/\"\n",
+    "\n",
+    "\n",
+    "def stem_data():\n",
+    "    _data = []\n",
+    "    data_path = os.path.join(data_dir, \"standard_luna_data.json\")\n",
+    "    with open(data_path, encoding=\"utf-8\") as f:\n",
+    "        for line in f.readlines():\n",
+    "            _data.append(json.loads(line))\n",
+    "    return _data\n",
+    "\n",
+    "train_items = stem_data()\n",
+    "\n",
+    "test_items = [\n",
+    "    {'ques_content': '有公式$\\\\FormFigureID{wrong1?}$和公式$\\\\FormFigureBase64{wrong2?}$，\\\n",
+    "            如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\\\n",
+    "            若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'},\n",
+    "    {'ques_content': '如图$\\\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \\\n",
+    "            若$x,y$满足约束条件$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$'}\n",
+    "]"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# 1. PretrainedEduTokenizer\n",
+    "\n",
+    "该类主要用于处理预训练模型的输入语料，主要成分包括词表(vocab) 和 基础令牌话容器，负责将输入语料处理为适合模型的输入格式。\n",
+    "\n",
+    "## 1.1 构造令牌化容器"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "14\n"
+     ]
+    },
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "Dump cache file failed.\n",
+      "Traceback (most recent call last):\n",
+      "  File \"/data/qlh/anaconda3/envs/py36/lib/python3.6/site-packages/jieba/__init__.py\", line 154, in initialize\n",
+      "    _replace_file(fpath, cache_file)\n",
+      "PermissionError: [Errno 1] Operation not permitted: '/tmp/tmpk245c2ok' -> '/tmp/jieba.cache'\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "379\n"
+     ]
+    }
+   ],
+   "source": [
+    "corpus_items = train_items + test_items\n",
+    "\n",
+    "# 定义参数\n",
+    "tokenizer_params = {\n",
+    "    \"add_specials\": True,\n",
+    "    \"tokenize_method\": \"pure_text\",\n",
+    "}\n",
+    "# 可自定义pure_text的参数， 参考Tokenizer/PureTextTokenizer\n",
+    "text_params = {\n",
+    "    \"granularity\": \"char\",\n",
+    "    \"stopwords\": None,\n",
+    "}\n",
+    "\n",
+    "tokenizer = PretrainedEduTokenizer(**tokenizer_params, text_params=text_params)\n",
+    "print(len(tokenizer))\n",
+    "\n",
+    "\n",
+    "# 设置预训练语料，训练令牌话容器\n",
+    "tokenizer.set_vocab(corpus_items, key=lambda x: x['ques_content'])\n",
+    "print(len(tokenizer))\n",
+    "\n",
+    "# 保存令牌话容器\n",
+    "pretrained_tokenizer_dir = output_dir\n",
+    "tokenizer.save_pretrained(pretrained_tokenizer_dir)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 1.2 使用令牌化容器"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['seq_idx', 'seq_len']\n",
+      "torch.Size([2, 17])\n",
+      "\n",
+      "['seq_idx', 'seq_len']\n",
+      "torch.Size([2, 100])\n",
+      "\n",
+      "[[1, 1, 1, 6, 22, 35, 130, 1, 9, 45, 19, 22, 46, 211, 130, 1, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [1, 6, 22, 35, 130, 1, 9, 45, 19, 22, 46, 211, 130, 1, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]\n",
+      "\n",
+      "['seq_idx', 'seq_len', 'seq_token']\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 加载令牌话容器\n",
+    "tokenizer = PretrainedEduTokenizer.from_pretrained(pretrained_tokenizer_dir)\n",
+    "\n",
+    "# 按batch进行padding\n",
+    "encodes = tokenizer(test_items, key=lambda x: x['ques_content'])\n",
+    "print(list(encodes.keys()))\n",
+    "print(encodes[\"seq_idx\"].shape)\n",
+    "print()\n",
+    "\n",
+    "# 按max_length进行padding\n",
+    "encodes = tokenizer(test_items, key=lambda x: x['ques_content'], padding=\"max_length\", max_length=100)\n",
+    "print(list(encodes.keys()))\n",
+    "print(encodes[\"seq_idx\"].shape)\n",
+    "print()\n",
+    "\n",
+    "# 不返回tensor\n",
+    "encodes = tokenizer(test_items, key=lambda x: x['ques_content'], padding=\"max_length\", max_length=100, return_tensors=False)\n",
+    "print(encodes[\"seq_idx\"])\n",
+    "print()\n",
+    "\n",
+    "# 保留tokens\n",
+    "encodes = tokenizer(test_items, key=lambda x: x['ques_content'], padding=\"max_length\", max_length=100, return_text=True)\n",
+    "print(list(encodes.keys()))\n",
+    "print()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 1.3 其他操作\n",
+    "\n",
+    "扩充词表"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['[PAD]', '[UNK]', '[BOS]', '[EOS]', '[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]', '[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]']\n",
+      "\n",
+      "['special']\n",
+      "['[PAD]', '[UNK]', '[BOS]', '[EOS]', '[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]', '[TEXT]', '[FORMULA]', '[FIGURE]', '[MARK]', '[TAG]', '[SEP]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', '[FORMULA_END]', '[special]']\n",
+      "\n",
+      "['token']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(tokenizer.vocab._special_tokens)\n",
+    "print()\n",
+    "\n",
+    "# 增加特殊词\n",
+    "tokenizer.add_specials([\"[special]\"])\n",
+    "print(tokenizer.tokenize(\"[special]\"))\n",
+    "print(tokenizer.vocab._special_tokens)\n",
+    "print()\n",
+    "\n",
+    "# 增加词\n",
+    "tokenizer.add_tokens([\"[token]\"])\n",
+    "print(tokenizer.tokenize(\"[token]\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "编码/解码 句子"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1, 370, 371]\n",
+      "['[UNK]', '公', '式']\n"
+     ]
+    }
+   ],
+   "source": [
+    "encode_idxs = tokenizer.encode('公式 公 式')\n",
+    "print(encode_idxs)\n",
+    "\n",
+    "encode_tokens = tokenizer.decode(encode_idxs)\n",
+    "print(encode_tokens)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "修改基础令牌化容器"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 可自定义参数\n",
+    "formula_params = {\n",
+    "    \"skip_figure_formula\": True,\n",
+    "    \"symbolize_figure_formula\": False\n",
+    "}\n",
+    "\n",
+    "tokenizer._set_basic_tokenizer(\"ast_formula\", formula_params=formula_params)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "保存与加载"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 保存\n",
+    "save_dir = \"./tmp\"\n",
+    "tokenizer.save_pretrained(save_dir)\n",
+    "\n",
+    "# 加载\n",
+    "tokenizer = PretrainedEduTokenizer.from_pretrained(save_dir)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# EduDataset\n",
+    "\n",
+    "## 直接使用"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "ef0459814fb544fba1012e98961c1035",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "  0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "dict_keys(['seq_idx', 'seq_len'])\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 使用EduDataset\n",
+    "dataset = EduDataset(tokenizer, items=train_items,\n",
+    "                     stem_key=\"ques_content\")\n",
+    "print(dataset[0].keys())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "113cf20b74964d31ab2905dd22fccaa6",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "  0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "dict_keys(['labels', 'seq_idx', 'seq_len'])\n"
+     ]
+    }
+   ],
+   "source": [
+    "dataset = EduDataset(tokenizer, items=train_items,\n",
+    "                     stem_key=\"ques_content\", label_key=\"difficulty\")\n",
+    "print(dataset[0].keys())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "d4cb52b096604adc9315de47f8b08ff2",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "  0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "dict_keys(['know_list', 'labels', 'seq_idx', 'seq_len'])\n"
+     ]
+    }
+   ],
+   "source": [
+    "dataset = EduDataset(tokenizer, items=train_items,\n",
+    "                     stem_key=\"ques_content\", label_key=\"difficulty\", feature_keys=[\"know_list\"])\n",
+    "print(dataset[0].keys())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 保存与加载\n",
+    "\n",
+    "考虑到预处理耗时久，若希望下次能直接使用处理后的数据，可将预处理后的数据保存在本地。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "dataset.to_disk(output_dir)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "dict_keys(['seq_idx', 'seq_len'])\n",
+      "dict_keys(['know_list', 'labels', 'seq_idx', 'seq_len'])\n"
+     ]
+    }
+   ],
+   "source": [
+    "# # 保存\n",
+    "dataset.to_disk(output_dir)\n",
+    "\n",
+    "# # 加载\n",
+    "dataset1 = EduDataset(tokenizer, ds_disk_path=output_dir)\n",
+    "print(dataset1[0].keys())\n",
+    "\n",
+    "dataset2 = EduDataset(tokenizer, ds_disk_path=output_dir, label_key=\"difficulty\", feature_keys=[\"know_list\"])\n",
+    "print(dataset2[0].keys())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## 并行预处理\n",
+    "在题目数据量过大时，令牌化等预处理操作耗时较长，可通过并行处理加速。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "       "
+     ]
+    },
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "60db0b94003e4681b56d88465c6c7c39",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "#0:   0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      " "
+     ]
+    },
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "5db7f48bf4ad43ea8e951fa3173d09b1",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "#1:   0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "05676952d6734c5f93a6618511f40f82",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "#2:   0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "43cb913cefbc4e1ca22bbd5d92db9fa5",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "#3:   0%|          | 0/1 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "dict_keys(['seq_idx', 'seq_len'])\n",
+      "spand time: 1.641s\n"
+     ]
+    },
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "7e63e29b8163448d87343ea0cb89bf2d",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "  0%|          | 0/3 [00:00<?, ?ba/s]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "dict_keys(['seq_idx', 'seq_len'])\n",
+      "spand time: 4.484s\n"
+     ]
+    }
+   ],
+   "source": [
+    "import time\n",
+    "\n",
+    "s = time.time()\n",
+    "# 使用并行加速\n",
+    "dataset = EduDataset(tokenizer, items=train_items*100,\n",
+    "                    stem_key=\"ques_content\",\n",
+    "                    num_processor=4)\n",
+    "print(dataset[0].keys())\n",
+    "e = time.time()\n",
+    "print(f\"spand time: {(e - s):.4}s\")\n",
+    "\n",
+    "s = time.time()\n",
+    "# 不使用并行加速\n",
+    "dataset = EduDataset(tokenizer, items=train_items*100,\n",
+    "                    stem_key=\"ques_content\",)\n",
+    "print(dataset[0].keys())\n",
+    "e = time.time()\n",
+    "print(f\"spand time: {(e - s):.4}s\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3.6.13 ('py36')",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.13"
+  },
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "672c49ef5d0c797ca83477c465883c954b68a3ad2765b748855bc549ed895b7b"
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/examples/pretrain/quesnet.ipynb b/examples/pretrain/quesnet.ipynb
index 2ea685e1..c5469c50 100644
--- a/examples/pretrain/quesnet.ipynb
+++ b/examples/pretrain/quesnet.ipynb
@@ -352,11 +352,8 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "2a09bcfc86f5d80d5adfb774779878f28f4d48d5a6d6c0020bcfd8afaf909ec6"
-  },
   "kernelspec": {
-   "display_name": "Python 3.6.13 ('data')",
+   "display_name": "Python 3.10.4 64-bit",
    "language": "python",
    "name": "python3"
   },
@@ -370,9 +367,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.10.4"
   },
-  "orig_nbformat": 4
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
+  }
  },
  "nbformat": 4,
  "nbformat_minor": 2
diff --git a/examples/pretrain/rnn/rnn.py b/examples/pretrain/rnn/rnn.py
index e94e1ac5..781e9015 100644
--- a/examples/pretrain/rnn/rnn.py
+++ b/examples/pretrain/rnn/rnn.py
@@ -8,7 +8,7 @@
 
 
 def etl():
-    tokenizer = get_tokenizer("text")
+    tokenizer = get_tokenizer("pure_text")
     return tokenizer([item["stem"] for item in load_jsonl("../../../data/OpenLUNA.json")])
 
 
diff --git a/examples/t2v/t2v_elmo.ipynb b/examples/t2v/t2v_elmo.ipynb
index 22919839..c754b4d1 100644
--- a/examples/t2v/t2v_elmo.ipynb
+++ b/examples/t2v/t2v_elmo.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# 使用QuesNet向量化容器\n",
+    "# 使用ELMo向量化容器\n",
     "## 导入功能块"
    ]
   },
@@ -128,11 +128,8 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "2a09bcfc86f5d80d5adfb774779878f28f4d48d5a6d6c0020bcfd8afaf909ec6"
-  },
   "kernelspec": {
-   "display_name": "Python 3.6.13 ('data')",
+   "display_name": "Python 3.8.13 ('nlp')",
    "language": "python",
    "name": "python3"
   },
@@ -146,9 +143,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.8.13"
   },
-  "orig_nbformat": 4
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "cc3e3b0a667322a868bdd200d76d82ed50310f7037715f6f0bc4c373c1c03ce5"
+   }
+  }
  },
  "nbformat": 4,
  "nbformat_minor": 2
diff --git a/examples/test_model/d2v/d2v_test_256.zip b/examples/test_model/d2v/d2v_test_256.zip
deleted file mode 100644
index 7cd4b8c7..00000000
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diff --git a/examples/test_model/d2v/d2v_test_256/d2v_test_256.bin b/examples/test_model/d2v/d2v_test_256/d2v_test_256.bin
deleted file mode 100644
index 7a56bca4..00000000
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diff --git a/examples/test_model/d2v/test_gensim_luna_stem_tf_d2v_256.bin b/examples/test_model/d2v/test_gensim_luna_stem_tf_d2v_256.bin
deleted file mode 100644
index 7a56bca4..00000000
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diff --git a/examples/test_model/disenq/concept.list b/examples/test_model/disenq/concept.list
deleted file mode 100644
index e9431038..00000000
--- a/examples/test_model/disenq/concept.list
+++ /dev/null
@@ -1,5 +0,0 @@
-*
-+
--
-/
-^
\ No newline at end of file
diff --git a/examples/test_model/disenq/disen_q_net.th b/examples/test_model/disenq/disen_q_net.th
deleted file mode 100644
index 9c100038..00000000
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diff --git a/examples/test_model/disenq/disenq_test_128.zip b/examples/test_model/disenq/disenq_test_128.zip
deleted file mode 100644
index c416e1b3..00000000
Binary files a/examples/test_model/disenq/disenq_test_128.zip and /dev/null differ
diff --git a/examples/test_model/disenq/disenq_test_128/concept.list b/examples/test_model/disenq/disenq_test_128/concept.list
deleted file mode 100644
index e9431038..00000000
--- a/examples/test_model/disenq/disenq_test_128/concept.list
+++ /dev/null
@@ -1,5 +0,0 @@
-*
-+
--
-/
-^
\ No newline at end of file
diff --git a/examples/test_model/disenq/disenq_test_128/disen_q_net.th b/examples/test_model/disenq/disenq_test_128/disen_q_net.th
deleted file mode 100644
index 233a6f2c..00000000
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diff --git a/examples/test_model/disenq/disenq_test_128/model_config.json b/examples/test_model/disenq/disenq_test_128/model_config.json
deleted file mode 100644
index 86ecf991..00000000
--- a/examples/test_model/disenq/disenq_test_128/model_config.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "vocab_size": 3702,
-  "concept_size": 5,
-  "hidden_dim": 128,
-  "dropout": 0.2,
-  "pos_weight": 1,
-  "w_cp": 1.5,
-  "w_mi": 1.0,
-  "w_dis": 2.0
-}
\ No newline at end of file
diff --git a/examples/test_model/disenq/disenq_test_128/tokenizer_config.json b/examples/test_model/disenq/disenq_test_128/tokenizer_config.json
deleted file mode 100644
index afe9619b..00000000
--- a/examples/test_model/disenq/disenq_test_128/tokenizer_config.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "tokenize_method": "space",
-  "num_token": "<num>",
-  "unk_token": "<unk>",
-  "pad_token": "<pad>",
-  "max_length": 250,
-  "vocab_path": "/home/qlh/data_pretrain/data/disenq/disenq_s/vocab.list"
-}
\ No newline at end of file
diff --git a/examples/test_model/disenq/disenq_test_128/vocab.list b/examples/test_model/disenq/disenq_test_128/vocab.list
deleted file mode 100644
index 415676c9..00000000
--- a/examples/test_model/disenq/disenq_test_128/vocab.list
+++ /dev/null
@@ -1,3702 +0,0 @@
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-～
\ No newline at end of file
diff --git a/examples/test_model/disenq/disenq_test_128/wv.th b/examples/test_model/disenq/disenq_test_128/wv.th
deleted file mode 100644
index 11369350..00000000
Binary files a/examples/test_model/disenq/disenq_test_128/wv.th and /dev/null differ
diff --git a/examples/test_model/disenq/model_config.json b/examples/test_model/disenq/model_config.json
deleted file mode 100644
index 820894d8..00000000
--- a/examples/test_model/disenq/model_config.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "vocab_size": 6827,
-  "concept_size": 5,
-  "hidden_dim": 128,
-  "dropout": 0.2,
-  "pos_weight": 1,
-  "w_cp": 1.5,
-  "w_mi": 1.0,
-  "w_dis": 2.0
-}
\ No newline at end of file
diff --git a/examples/test_model/disenq/tokenizer_config.json b/examples/test_model/disenq/tokenizer_config.json
deleted file mode 100644
index ca1cf40a..00000000
--- a/examples/test_model/disenq/tokenizer_config.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "tokenize_method": "space",
-  "num_token": "<num>",
-  "unk_token": "<unk>",
-  "pad_token": "<pad>",
-  "max_length": 250
-}
\ No newline at end of file
diff --git a/examples/test_model/disenq/vocab.list b/examples/test_model/disenq/vocab.list
deleted file mode 100644
index 5b8de1c6..00000000
--- a/examples/test_model/disenq/vocab.list
+++ /dev/null
@@ -1,6827 +0,0 @@
-<num>
-<unk>
-<pad>
-!
-%
-(
-)
-*
-+
--
-/
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-[
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index 2b28cac6..00000000
Binary files a/examples/test_model/disenq/wv.th and /dev/null differ
diff --git a/examples/test_model/elmo/config.json b/examples/test_model/elmo/config.json
deleted file mode 100644
index 81c80f6a..00000000
--- a/examples/test_model/elmo/config.json
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/examples/test_model/elmo/elmo_test.zip b/examples/test_model/elmo/elmo_test.zip
deleted file mode 100644
index 9d90d15c..00000000
Binary files a/examples/test_model/elmo/elmo_test.zip and /dev/null differ
diff --git a/examples/test_model/elmo/elmo_test/config.json b/examples/test_model/elmo/elmo_test/config.json
deleted file mode 100644
index 83ae0719..00000000
--- a/examples/test_model/elmo/elmo_test/config.json
+++ /dev/null
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diff --git a/examples/test_model/elmo/elmo_test/vocab.json b/examples/test_model/elmo/elmo_test/vocab.json
deleted file mode 100644
index 90239fb5..00000000
--- a/examples/test_model/elmo/elmo_test/vocab.json
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diff --git a/examples/test_model/elmo/elmo_test/weight.pt b/examples/test_model/elmo/elmo_test/weight.pt
deleted file mode 100644
index 1ccb2210..00000000
Binary files a/examples/test_model/elmo/elmo_test/weight.pt and /dev/null differ
diff --git a/examples/test_model/elmo/vocab.json b/examples/test_model/elmo/vocab.json
deleted file mode 100644
index 7273796e..00000000
--- a/examples/test_model/elmo/vocab.json
+++ /dev/null
@@ -1 +0,0 @@
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"\u6570\u5217": 180, "\u524d": 181, "16": 182, "\u9879": 183, "540": 184, "\u67d0\u5382": 185, "\u63a5\u53d7": 186, "\u4e00\u9879": 187, "\u52a0\u5de5": 188, "\u4e1a\u52a1": 189, "\u4ea7\u54c1": 190, "\u4ef6": 191, "\u6807\u51c6": 192, "\u5206\u4e3a": 193, "\u7b49\u7ea7": 194, "\u7ea6\u5b9a": 195, "\u7ea7\u54c1": 196, "\u5382\u5bb6": 197, "\u6bcf\u4ef6": 198, "\u6536\u53d6": 199, "\u52a0\u5de5\u8d39": 200, "90": 201, "\u5143": 202, "50": 203, "\u8d54\u507f": 204, "\u539f\u6599": 205, "\u635f\u5931\u8d39": 206, "\u8be5\u5382": 207, "\u6709\u7532": 208, "\u4e59": 209, "\u5206\u5382": 210, "\u627f\u63a5": 211, "\u7532": 212, "\u6210\u672c\u8d39": 213, "25": 214, "\u5404\u8bd5": 215, "100": 216, "\u7edf\u8ba1": 217, "\u6574\u7406": 218, "\u4f30\u8ba1": 219, "\u4e24": 220, "\u4e00\u4ef6": 221, "\u6c42\u7532": 222, "\u4ef6\u4ea7\u54c1": 223, "\u5e73\u5747\u5229\u6da6": 224, "\u5e94\u9009": 225, "\u5185\u89d2": 226, "150": 227, "\\sqrt": 228, "\u6c42": 229, "\\sin": 230, "\u5982\u56fe": 231, "\u5706\u9525": 232, "\u9876\u70b9": 233, "\u5706\u5fc3": 234, "\u5185\u63a5": 235, "\u6b63\u4e09\u89d2\u5f62": 236, "DO": 237, "\u4e00\u70b9": 238, "\\angle": 239, "APC": 240, "\u8bc1\u660e": 241, "\u5e73\u9762": 242, "PAB": 243, "PAC": 244, "\u4fa7": 245, "\u4e09\u68f1\u9525": 246, "\u4f53\u79ef": 247, "e": 248, "\u65f6": 249, "\u8ba8\u8bba": 250, "\u5355\u8c03": 251, "\u6027": 252, "\u96f6\u70b9": 253, "\u53d6\u503c": 254, "\u692d\u5706": 255, "E": 256, ">": 257, "\u5de6": 258, "\u53f3": 259, "G": 260, "\\overrightarrow": 261, "AG": 262, "\\cdot": 263, "GB": 264, "\u52a8\u70b9": 265, "PA": 266, "\u4ea4\u70b9": 267, "PB": 268, "CD": 269, "\u5b9a\u70b9": 270, "\u9009\u4fee": 271, "\u5750\u6807\u7cfb": 272, "\u53c2\u6570": 273, "\u76f4\u89d2\u5750\u6807": 274, "\u7cfb": 275, "xOy": 276, "l": 277, "k": 278, "t": 279, "\u6781\u70b9": 280, "\u8f74\u6b63": 281, "\u534a\u8f74": 282, "\u6781\u8f74": 283, "\u5efa\u7acb": 284, "\u6781": 285, "\u6781\u5750\u6807": 286, "\\rho": 287, "\\theta": 288, "\u516c\u5171": 289, "\u4e0d\u7b49\u5f0f": 290, "\u9009\u8bb2": 291, "\u753b\u51fa": 292, "\u89e3\u96c6": 293, "\\in": 294, "Z": 295, "\\mathbf": 296, "\u94a2\u7434": 297, "12": 298, "\u4e2a\u952e": 299, "\u4f9d\u6b21": 300, "\u8bb0": 301, "j": 302, "\u79f0": 303, "\u539f\u4f4d": 304, "\u5927\u4e09\u548c\u5f26": 305, "\u5c0f\u4e09\u548c\u5f26": 306, "\u4e2a\u6570": 307, "\u7ec4\u5408": 308, "\u65b0\u51a0": 309, "\u80ba\u708e": 310, "\u75ab\u60c5": 311, "\u9632\u63a7": 312, "\u671f\u95f4": 313, "\u8d85\u5e02": 314, "\u5f00\u901a": 315, "\u7f51\u4e0a": 316, "\u9500\u552e\u4e1a\u52a1": 317, "1200": 318, "\u4efd": 319, "\u8ba2\u5355": 320, "\u914d\u8d27": 321, "\u91cf": 322, "\u5927\u5e45": 323, "\u589e\u52a0": 324, "\u5bfc\u81f4": 325, "\u79ef\u538b": 326, "\u89e3\u51b3\u56f0\u96be": 327, "\u5fd7\u613f\u8005": 328, "\u8e0a\u8dc3\u62a5\u540d": 329, "\u53c2\u52a0": 330, "\u5de5\u4f5c": 331, "\u67d0\u65e5": 332, "500": 333, "\u672a\u914d": 334, "\u8d27": 335, "\u9884\u8ba1": 336, "\u7b2c\u4e8c\u5929": 337, "\u65b0": 338, "\u8d85\u8fc7": 339, "1600": 340, "0.05": 341, "\u6bcf\u4eba\u6bcf\u5929": 342, "\u79ef\u533b": 343, "\u5f53\u65e5": 344, "\u690e\u7387": 345, "\u5c0f\u4e8e": 346, "0.95": 347, "\u81f3\u5c11": 348, "\u5355\u4f4d\u5411\u91cf": 349, "\u5939\u89d2": 350, "60": 351, "\u5782\u76f4": 352, "S": 353, "24": 354, "\u8f93\u5165": 355, "\u5750\u6807\u8f74": 356, "\u76f8\u5207": 357, "\u8ddd\u79bb": 358, "\u4e24\u6761": 359, "\u6e10\u8fd1\u7ebf": 360, "\u4ea4": 361, "\u4e24\u70b9": 362, "\\Delta": 363, "ODE": 364, "\u7126\u8ddd": 365, "9": 366, "\u82e5\u7403": 367, "\u5bf9\u6570\u51fd\u6570": 368, "\u5bfc\u6570": 369, "\u7b49\u5dee\u6570\u5217": 370, "\u8bbe\u6709": 371, "\u547d\u9898": 372, "p": 373, "\u76f8\u4ea4": 374, "\u4e09\u6761": 375, "\u5fc5\u5728": 376, "\u7a7a\u95f4": 377, "\u4efb\u610f": 378, "\u4e09\u70b9": 379, "\u6709\u4e14": 380, "\u4ec5": 381, "\u5e73\u884c": 382, "\\subset": 383, "\\alpha": 384, "\u4e0b\u8ff0": 385, "\u771f": 386, 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"\u5e38\u7528": 490, "\u6570\u5b66\u6a21\u578b": 491, "\u6d41\u884c\u75c5\u5b66": 492, "\u9886\u57df": 493, "\u5b66\u8005": 494, "\u516c\u5e03": 495, "\u7d2f\u8ba1": 496, "\u786e\u8bca": 497, "\u75c5\u4f8b": 498, "T": 499, "\u5929": 500, "\u6307\u6570\u51fd\u6570": 501, "I": 502, "K": 503, "0.23": 504, "53": 505, "*": 506, "\u6807\u5fd7": 507, "\u521d\u6b65": 508, "\u904f\u5236": 509, "\u7ea6": 510, "19": 511, "\u8f68\u8ff9": 512, "\u629b\u7269\u7ebf": 513, "px": 514, "\u4ea4\u4e8e": 515, "OD": 516, "OE": 517, "\u53f3\u56fe": 518, "\u51e0\u4f55\u4f53": 519, "\u4e09\u89c6\u56fe": 520, "\\tan": 521, "\\prime": 522, "\u534a\u5f84": 523, "\u6bcd\u7ebf": 524, "\u957f\u4e3a": 525, "\u901a\u9879": 526, "\u516c\u5f0f": 527, "\u5b66\u751f": 528, "\u5174\u8da3\u5c0f\u7ec4": 529, "\u968f\u673a": 530, "\u67d0\u5e02": 531, "\u5929\u4e2d": 532, "\u7a7a\u6c14\u8d28\u91cf": 533, "\u5f53\u5929": 534, "\u516c\u56ed": 535, "\u953b\u70bc": 536, "\u4eba\u6b21": 537, "\u4e0b\u8868": 538, "ad": 539, "bc": 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1895, "\u622a\u6b64": 1896, "\u5973\u751f": 1897, "\u7537\u751f": 1898, "\u4e2d\u9009": 1899, "\u79d1\u6280": 1900, "\u5165\u9009": 1901, "\u6cd5\u5171": 1902, "ADC": 1903, "ADB": 1904, "DFC": 1905, "\u76ee": 1906, "PEF": 1907, "ABFD": 1908, "DP": 1909, "OMA": 1910, "OMB": 1911, "\u6210\u7bb1": 1912, "\u5305\u88c5": 1913, "\u6bcf\u7bb1": 1914, "\u4e00\u7bb1": 1915, "\u4ea4\u4ed8": 1916, "\u68c0\u9a8c": 1917, "\u4e0d\u5408\u683c\u54c1": 1918, "\u5408\u683c\u54c1": 1919, "\u5148": 1920, "\u8fd9\u7bb1": 1921, "\u73b0\u5bf9": 1922, "\u4ea7\u54c1\u68c0\u9a8c": 1923, "\u82e5\u6709": 1924, "\u624b\u4e2d": 1925, "\u652f\u4ed8": 1926, "\u8be5\u7bb1": 1927, "EX": 1928, "\u5178\u7c4d": 1929, "\u5468\u6613": 1930, "\u5366": 1931, "\u4e07\u7269": 1932, "\u6bcf\u4e00": 1933, "\u91cd\u5366": 1934, "\u4ece\u4e0b\u5230\u4e0a": 1935, "\u723b": 1936, "\u9633\u723b": 1937, "\u9634\u723b": 1938, "\u4e00\u91cd": 1939, "\u4e2a\u9633": 1940, "CEF": 1941, "\u4e24\u961f": 1942, "\u7bee\u7403": 1943, "\u51b3\u8d5b": 1944, "\u4e03\u573a": 1945, "\u56db\u80dc\u5236": 1946, "\u4e00\u961f": 1947, "\u8d62\u5f97": 1948, "\u80dc\u5229": 1949, "\u8be5\u961f": 1950, "\u524d\u671f": 1951, "\u7532\u961f": 1952, "\u4e3b\u5ba2\u573a": 1953, "\u4e3b": 1954, "\u4e3b\u5ba2": 1955, "\u5ba2": 1956, "\u4e3b\u573a": 1957, "\u53d6\u80dc": 1958, "\u5ba2\u573a": 1959, "\u5404\u573a": 1960, "\u6bd4\u8d5b\u7ed3\u679c": 1961, "\u2236": 1962, "AP": 1963, "\u6781\u5927\u503c": 1964, "\u6cbb\u7597": 1965, "\u75be\u75c5": 1966, "\u7814\u5236": 1967, "\u65b0\u836f": 1968, "\u5e0c\u671b": 1969, "\u52a8\u7269": 1970, "\u65b9\u6848": 1971, "\u4e00\u8f6e": 1972, "\u4e24\u53ea": 1973, "\u767d\u9f20": 1974, "\u836f\u6548": 1975, "\u4e00\u53ea": 1976, "\u65bd\u4ee5": 1977, "\u7532\u836f": 1978, "\u53e6\u4e00\u53ea": 1979, "\u4e59\u836f": 1980, "\u836f": 1981, "\u6cbb\u6108": 1982, "\u53ea\u65f6": 1983, "\u505c\u6b62": 1984, "\u6570\u591a": 1985, "\u6bcf\u8f6e": 1986, "\u836f\u5747": 1987, "\u6cbb\u6108\u7387": 1988, "\u4e2d\u7532\u836f": 1989, "\u5f97\u5206": 1990, "\u82e5\u7532\u836f": 1991, "\u8d4b\u4e88": 1992, "\u6bd4\u4e59\u836f": 1993, "ap": 1994, "bp": 1995, "cp": 1996, "0.8": 1997, "\u89e3\u91ca": 1998, "\\bullet": 1999, "\u89c4\u8303": 2000, "01": 2001, "2m": 2002, "\u9879\u4e3a": 2003, "31": 2004, "32": 2005, "2MD": 2006, "PMN": 2007, "\u9996\u9879": 2008, "\u5df3": 2009, "\u4ee5\u70b9": 2010, "\u5706\u4e0a": 2011, "\u7684\u6700\u5c0f\u503c\u4e3a": 2012, "\u65cb\u8f6c\u8f74": 2013, "\u65cb\u8f6c": 2014, "\u89d2\u65f6": 2015, "ABD": 2016, "CBD": 2017, "\u82e5\u5e73\u4ea9": 2018, "ln": 2019, "\u4e0e": 2020, "\u7684\u4ea4\u70b9\u4e3a": 2021, "\u5f53": 2022, "\u65b9\u5f0f": 2023, "DX": 2024, "2.4": 2025, "quad": 2026, "\u6c42\u9762": 2027, "MAB": 2028, "\u4e0e\u9762": 2029, "MCD": 2030, "PFO": 2031, "\u6781\u5c0f\u503c": 2032, "29": 2033, "___________.": 2034, "\u2212": 2035, "CG": 2036, "ADBE": 2037, "\u9876\u89d2": 2038, "xf": 2039, "\u5947": 2040, "\u6570\u6b21": 2041, "\u5e42\u9879": 2042, "\u500d": 2043, "62": 2044, "73": 2045, "81": 2046, "92": 2047, "95": 2048, "85": 2049, "64": 2050, "76": 2051, "78": 2052, "86": 2053, "66": 2054, "97": 2055, "88": 2056, "82": 2057, "89": 2058, "83": 2059, "51": 2060, "93": 2061, "65": 2062, "56": 2063, "54": 2064, "79": 2065, "\u5ef6\u957f\u7ebf": 2066, "\u6bb5": 2067, "OAPB": 2068, "\u82e5\u80fd": 2069, "\u8857\u9053": 2070, "\u51fa\u53d1": 2071, "\u5148\u5230": 2072, "\u5c0f\u7ea2": 2073, "\u4f1a\u5408": 2074, "\u8001\u5e74\u516c\u5bd3": 2075, "\u9009\u62e9": 2076, "\u77ed": 2077, "\u6761\u6570": 2078, "2n": 2079, "\u4e24\u6570": 2080, "\u5e73\u65b9\u548c": 2081, "\u6a21\u62df": 2082, "\u8fd1\u4f3c\u503c": 2083, "\\paralleln": 2084, "\u586b": 2085, "101": 2086, "\u4fdd\u9669": 2087, "\u8bbe\u8be5": 2088, "\u6c42\u4e00": 2089, "\u6c42\u5176": 2090, "\u9ad8\u51fa": 2091, "60%": 2092, "\u6c42\u51fd\u6570": 2093, "\u7edf\u5b97": 2094, "\u4e2d\u6709": 2095, "\u8fdc\u770b": 2096, "\u5dcd\u5dcd": 2097, "\u5854": 2098, "\u4e03\u5c42": 2099, "\u7ea2\u5149": 2100, "\u70b9\u70b9": 2101, "\u589e": 2102, "\u5171\u706f": 2103, "\u4e09\u767e": 2104, "\u516b\u5341\u4e00": 2105, "\u8bf7\u95ee": 2106, "\u5c16\u5934": 2107, "\u51e0\u76cf": 2108, "\u706f": 2109, "\u4e00\u5ea7": 2110, "\u5c42\u5854\u5171\u6302": 2111, "381": 2112, "\u76cf\u706f": 2113, "\u4e24\u5c42": 2114, "\u706f\u6570": 2115, "\u9876\u5c42": 2116, "\u6240\u622a": 2117, "\u76f4\u4e09": 2118, "\u4e00\u6279": 2119, "\u4e8c\u7b49\u54c1": 2120, "\u7387\u4e3a": 2121, "0.02": 2122, "\u8fd9\u6279": 2123, "\u6709\u653e": 2124, "\u56de\u5730": 2125, "\u4ef6\u6570": 2126, "\u6c42\u65b0": 2127, "\u6cd5\u7bb1": 2128, "y2": 2129, "\u9648\u666f\u6da6": 2130, "\u54e5\u5fb7\u5df4\u8d6b\u731c\u60f3": 2131, "\u4e16\u754c\u9886\u5148": 2132, "\u6210\u679c": 2133, "\u7d20\u6570": 2134, "DB": 2135, "PAM": 2136, "tain": 2137, "5x": 2138, "2019": 2139, "\u5ae6\u5a25": 2140, "\u56db\u53f7": 2141, "\u63a2\u6d4b\u5668": 2142, "\u4eba\u7c7b": 2143, "\u5386\u53f2": 2144, "\u6708\u7403": 2145, "\u80cc\u9762": 2146, "\u8f6f\u7740\u9646": 2147, "\u822a\u5929\u4e8b\u4e1a": 2148, "\u91cd\u5927\u6210\u5c31": 2149, "\u89e3\u51b3": 2150, "\u5173\u952e\u6280\u672f": 2151, "\u5730\u9762": 2152, "\u901a\u8baf\u8054\u7cfb": 2153, "\u53d1\u5c04": 2154, "\u4e2d\u7ee7": 2155, "\u661f": 2156, "\u9e4a\u6865": 2157, "\u56f4\u7ed5": 2158, "\u62c9\u683c\u6717": 2159, "L": 2160, "\u8f68\u9053": 2161, "\u8fd0\u884c": 2162, "\u5e73\u8861\u70b9": 2163, "\u8fde\u7ebf": 2164, "\u5730\u7403": 2165, "\u70b9\u5230": 2166, "\u725b\u987f": 2167, "\u8fd0\u52a8\u5b9a\u5f8b": 2168, "\u4e07\u6709\u5f15\u529b": 2169, "\u5b9a\u5f8b": 2170, "\u5f88\u5c0f": 2171, "\u8fd1\u4f3c\u8ba1\u7b97": 2172, "\u6f14\u8bb2\u6bd4\u8d5b": 2173, "\u8bc4\u59d4": 2174, "\u9009\u624b": 2175, "\u539f\u59cb": 2176, "\u8bc4\u5b9a": 2177, "\u53bb\u6389": 2178, "\u6700\u9ad8\u5206": 2179, "\u6700\u4f4e": 2180, "\u76f8\u6bd4": 2181, "\u7279\u5f81": 2182, "2px": 2183, "\u5bf9\u8fb9": 2184, "_________": 2185, "\u5206\u5236": 2186, "\u4e52\u4e53\u7403": 2187, "\u6bcf\u8d62": 2188, "\u4e00\u7403": 2189, "\u67d0\u5c40": 2190, "\u6253\u6210": 2191, "\u5e73\u540e": 2192, "\u6bcf\u7403": 2193, "\u4ea4\u6362": 2194, "\u53d1\u7403\u6743": 2195, "\u5148\u591a\u5f97": 2196, "\u4e00\u65b9": 2197, "\u8be5\u5c40": 2198, "\u5355\u6253": 2199, "\u53d1\u7403": 2200, "\u65f6\u7532": 2201, "0.4": 2202, "\u5404\u7403": 2203, "\u7532\u5148": 2204, "\u4e2a\u7403": 2205, "\\mathfrak": 2206, "\u4e4b\u79ef": 2207, "QE": 2208, "PQG": 2209}
\ No newline at end of file
diff --git a/examples/test_model/elmo/weight.pt b/examples/test_model/elmo/weight.pt
deleted file mode 100644
index 433247fd..00000000
Binary files a/examples/test_model/elmo/weight.pt and /dev/null differ
diff --git a/examples/test_model/quesnet/quesnet_test_256.zip b/examples/test_model/quesnet/quesnet_test_256.zip
deleted file mode 100644
index 4bd0b1be..00000000
Binary files a/examples/test_model/quesnet/quesnet_test_256.zip and /dev/null differ
diff --git a/examples/test_model/quesnet/quesnet_test_256/config.json b/examples/test_model/quesnet/quesnet_test_256/config.json
deleted file mode 100644
index baee2624..00000000
--- a/examples/test_model/quesnet/quesnet_test_256/config.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-  "meta": "know_name",
-  "emb_size": 256,
-  "rnn": "LSTM",
-  "lambda_input": [
-    1.0,
-    1.0,
-    1.0
-  ],
-  "lambda_loss": [
-    1.0,
-    1.0
-  ],
-  "layers": 4,
-  "feat_size": 256
-}
\ No newline at end of file
diff --git a/examples/test_model/quesnet/quesnet_test_256/model.pt b/examples/test_model/quesnet/quesnet_test_256/model.pt
deleted file mode 100644
index b0e8dd51..00000000
Binary files a/examples/test_model/quesnet/quesnet_test_256/model.pt and /dev/null differ
diff --git a/examples/test_model/quesnet/quesnet_test_256/tokenizer_config.json b/examples/test_model/quesnet/quesnet_test_256/tokenizer_config.json
deleted file mode 100644
index 6ee4f6b9..00000000
--- a/examples/test_model/quesnet/quesnet_test_256/tokenizer_config.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "img_token": "<img>",
-  "unk_token": "<unk>",
-  "pad_token": "<pad>",
-  "max_length": 250,
-  "meta": [
-    "know_name"
-  ]
-}
\ No newline at end of file
diff --git a/examples/test_model/quesnet/quesnet_test_256/vocab/meta_know_name.txt b/examples/test_model/quesnet/quesnet_test_256/vocab/meta_know_name.txt
deleted file mode 100644
index 14a71073..00000000
--- a/examples/test_model/quesnet/quesnet_test_256/vocab/meta_know_name.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-<unk>
-三角函数
-函数y=Asin(ωx +ф)的图像变换
-变量间的相关关系
-排列组合与概率统计
-棱柱的结构特征
-程序框图
-空间几何体
-立体几何
-算法与框图
-算法初步与框图
-统计与统计案例
\ No newline at end of file
diff --git a/examples/test_model/quesnet/quesnet_test_256/vocab/word.txt b/examples/test_model/quesnet/quesnet_test_256/vocab/word.txt
deleted file mode 100644
index 58982f76..00000000
--- a/examples/test_model/quesnet/quesnet_test_256/vocab/word.txt
+++ /dev/null
@@ -1,92 +0,0 @@
-<unk>
-<img>
-<pad>
-(
-)
-+
-,
--
-1
-10
-2
-20
-40
-6
-=
-C
-[
-\cdots
-\circ
-\cos
-\frac
-\left
-\mathrm
-\omega
-\pi
-\right
-]
-^
-_
-f
-i
-n
-x
-y
-{
-}
-三角形
-世界
-中
-之间
-以该
-作物
-侧面
-关系
-函数
-单位
-发芽
-发芽率
-古代
-右面
-周期
-四
-四个
-回归方程
-图
-图像
-埃及
-奇迹
-学习
-实验
-小组
-底边
-底面
-建筑
-形状
-执行
-散点图
-数据
-最小
-条件
-某校
-棱锥
-正四
-正方形
-比值
-温度
-研究
-种子
-程序框图
-等于
-类型
-胡夫
-视为
-设
-课外
-输出
-边长
-适宜
-金字塔
-面积
-高
-高为
\ No newline at end of file
diff --git a/examples/test_model/quesnet/tokenizer_config.json b/examples/test_model/quesnet/tokenizer_config.json
deleted file mode 100644
index 78c56a58..00000000
--- a/examples/test_model/quesnet/tokenizer_config.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "img_token": "<img>",
-  "unk_token": "<unk>",
-  "pad_token": "<pad>",
-  "max_length": 50,
-  "meta": [
-    "know_name"
-  ]
-}
\ No newline at end of file
diff --git a/examples/test_model/quesnet/vocab/meta_know_name.txt b/examples/test_model/quesnet/vocab/meta_know_name.txt
deleted file mode 100644
index 34389566..00000000
--- a/examples/test_model/quesnet/vocab/meta_know_name.txt
+++ /dev/null
@@ -1,48 +0,0 @@
-<unk>
- 基本初等函数Ⅰ
-三角函数
-三角函数及其恒等变换
-三角函数的定义域
-不等式选讲
-二阶矩阵
-代数
-函数y=Asin(ωx +ф)的图像变换
-函数模型的选择与应用
-函数的应用
-利用导数研究函数的极值
-双曲线的定义
-变量间的相关关系
-古典概型及其概率计算公式
-同角三角函数间的基本关系
-圆锥曲线与方程
-坐标系与参数方程
-复数代数形式的加减运算
-导数及其应用
-平面解析几何
-指数函数的实际应用
-换底公式的应用
-排列组合与概率统计
-数列
-数系的扩充与复数
-斜率的计算公式
-棱柱的结构特征
-椭圆的定义
-概率
-用空间向量求直线间的夹角、距离
-直线与方程
-矩阵与变换
-程序框图
-空间几何体
-空间向量与立体几何
-空间点、线、面的位置
-立体几何
-等比数列
-简单曲线的极坐标方程
-算法与框图
-算法初步与框图
-绝对值不等式
-统计与统计案例
-解三角形
-集合
-集合的相等
-高等数学
\ No newline at end of file
diff --git a/examples/test_model/quesnet/vocab/word.txt b/examples/test_model/quesnet/vocab/word.txt
deleted file mode 100644
index b9a161a6..00000000
--- a/examples/test_model/quesnet/vocab/word.txt
+++ /dev/null
@@ -1,67 +0,0 @@
-<unk>
-<img>
-<pad>
-(
-)
-+
-,
--
-0
-1
-2
-3
-4
-=
->
-A
-ABC
-B
-C
-D
-O
-P
-\\
-\circ
-\frac
-\left
-\pi
-\quad
-\right
-\sqrt
-\triangle
-\{
-\}
-^
-_
-_______
-a
-b
-c
-f
-i
-m
-n
-t
-x
-y
-z
-{
-{array}
-|
-}
-元
-函数
-加工
-参数
-圆锥
-已知
-底面
-方程
-棱锥
-正方形
-求
-点
-级品
-设
-面积
-顶点
\ No newline at end of file
diff --git a/examples/test_model/w2v/gensim_luna_stem_t_sg_100.kv b/examples/test_model/w2v/gensim_luna_stem_t_sg_100.kv
index 36ef1f9e..e6da1df1 100644
Binary files a/examples/test_model/w2v/gensim_luna_stem_t_sg_100.kv and b/examples/test_model/w2v/gensim_luna_stem_t_sg_100.kv differ
diff --git a/examples/test_model/w2v/w2v_test_256.zip b/examples/test_model/w2v/w2v_test_256.zip
deleted file mode 100644
index ac1511ef..00000000
Binary files a/examples/test_model/w2v/w2v_test_256.zip and /dev/null differ
diff --git a/examples/test_model/w2v/w2v_test_256/w2v_test_256.kv b/examples/test_model/w2v/w2v_test_256/w2v_test_256.kv
deleted file mode 100644
index 23544927..00000000
Binary files a/examples/test_model/w2v/w2v_test_256/w2v_test_256.kv and /dev/null differ
diff --git a/examples/tokenizer/all_tokenize.ipynb b/examples/tokenizer/all_tokenize.ipynb
index 9bc073f1..cfec7aa6 100644
--- a/examples/tokenizer/all_tokenize.ipynb
+++ b/examples/tokenizer/all_tokenize.ipynb
@@ -396,7 +396,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 39,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -464,7 +464,7 @@
        " '[FIGURE]']"
       ]
      },
-     "execution_count": 39,
+     "execution_count": 13,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -518,7 +518,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -532,8 +532,9 @@
        "'如图来自古希腊数学家希波克拉底所研究的几何图形．此图由三个半圆构成，三个半圆的直径分别为直角三角形$ABC$的斜边$BC$, 直角边$AB$, $AC$.$\\\\bigtriangleup ABC$的三边所围成的区域记为$I$,黑色部分记为$II$, 其余部分记为$III$.在整个图形中随机取一点，此点取自$I,II,III$的概率分别记为$p_1,p_2,p_3$,则$\\\\SIFChoice$$\\\\FigureID{1}$'"
       ]
      },
+     "execution_count": 14,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -553,7 +554,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 15,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -565,11 +566,12 @@
      "data": {
       "image/png": 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",
       "text/plain": [
-       "<PIL.PngImagePlugin.PngImageFile image mode=RGBA size=230x136 at 0x7F6DF04BBBE0>"
+       "<PIL.PngImagePlugin.PngImageFile image mode=RGBA size=230x136>"
       ]
      },
+     "execution_count": 15,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -590,7 +592,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -611,7 +613,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
@@ -620,9 +622,9 @@
        "True"
       ]
      },
-     "execution_count": 4,
+     "execution_count": 17,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -638,7 +640,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [
     {
@@ -647,9 +649,9 @@
        "False"
       ]
      },
-     "execution_count": 5,
+     "execution_count": 18,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -659,7 +661,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [
     {
@@ -668,9 +670,9 @@
        "'某校一个课外学习小组为研究某作物的发芽率$y$和温度$x$（单位...'"
       ]
      },
-     "execution_count": 6,
+     "execution_count": 19,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -714,7 +716,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
@@ -723,9 +725,9 @@
        "['如图来自古希腊数学家希波克拉底所研究的几何图形．此图由三个半圆构成，三个半圆的直径分别为直角三角形', 'ABC', '的斜边', 'BC', ', 直角边', 'AB', ', ', 'AC', '.', '\\\\bigtriangleup ABC', '的三边所围成的区域记为', 'I', ',黑色部分记为', 'II', ', 其余部分记为', 'III', '.在整个图形中随机取一点，此点取自', 'I,II,III', '的概率分别记为', 'p_1,p_2,p_3', ',则', '\\\\SIFChoice', \\FigureID{1}]"
       ]
      },
-     "execution_count": 7,
+     "execution_count": 20,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -742,7 +744,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -761,9 +763,9 @@
        " ',则']"
       ]
      },
-     "execution_count": 8,
+     "execution_count": 21,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -779,7 +781,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 22,
    "metadata": {},
    "outputs": [
     {
@@ -797,9 +799,9 @@
        " 'p_1,p_2,p_3']"
       ]
      },
-     "execution_count": 9,
+     "execution_count": 22,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -815,7 +817,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [
     {
@@ -824,9 +826,9 @@
        "[\\FigureID{1}]"
       ]
      },
-     "execution_count": 10,
+     "execution_count": 23,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -835,19 +837,19 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 24,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "image/png": 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",
       "text/plain": [
-       "<PIL.PngImagePlugin.PngImageFile image mode=RGBA size=230x136 at 0x7F6DF04BBBE0>"
+       "<PIL.PngImagePlugin.PngImageFile image mode=RGBA size=230x136>"
       ]
      },
-     "execution_count": 11,
+     "execution_count": 24,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -863,7 +865,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [
     {
@@ -872,9 +874,9 @@
        "['\\\\SIFChoice']"
       ]
      },
-     "execution_count": 12,
+     "execution_count": 25,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -902,7 +904,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 26,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -916,9 +918,9 @@
        "['[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[FORMULA]', '[TEXT]', '[MARK]', '[FIGURE]']"
       ]
      },
-     "execution_count": 13,
+     "execution_count": 26,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -943,7 +945,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 27,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -969,7 +971,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 28,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -1015,9 +1017,9 @@
        " '记']"
       ]
      },
-     "execution_count": 15,
+     "execution_count": 28,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -1038,7 +1040,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 29,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -1076,9 +1078,9 @@
        " '3']"
       ]
      },
-     "execution_count": 16,
+     "execution_count": 29,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -1101,7 +1103,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 30,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -1139,9 +1141,9 @@
        " '3']"
       ]
      },
-     "execution_count": 17,
+     "execution_count": 30,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -1168,7 +1170,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 31,
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -1191,9 +1193,9 @@
        " <Formula: p_1,p_2,p_3>]"
       ]
      },
-     "execution_count": 18,
+     "execution_count": 31,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -1218,27 +1220,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[<networkx.classes.digraph.DiGraph at 0x7f6d28ca3940>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28cb5a60>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28caba30>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d26b28fd0>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28cd4490>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28cd4d90>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28c843a0>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28c84ee0>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28c84610>,\n",
-       " <networkx.classes.digraph.DiGraph at 0x7f6d28c84b50>]"
+       "[<networkx.classes.digraph.DiGraph at 0x1e3dab1c7c0>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3dab1f400>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3dab1d930>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3dab145b0>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3d61271c0>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3daa8dff0>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3daa8f370>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3daa6c2e0>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3dab28ca0>,\n",
+       " <networkx.classes.digraph.DiGraph at 0x1e3dab2acb0>]"
       ]
      },
-     "execution_count": 19,
+     "execution_count": 32,
      "metadata": {},
-     "output_type": "display_data"
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -1260,9 +1262,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 33,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "ename": "NameError",
+     "evalue": "name 'ForestPlotter' is not defined",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
+      "Cell \u001b[1;32mIn [33], line 2\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[39mfor\u001b[39;00m i \u001b[39min\u001b[39;00m \u001b[39mrange\u001b[39m(\u001b[39m0\u001b[39m, \u001b[39mlen\u001b[39m(f)):\n\u001b[1;32m----> 2\u001b[0m     ForestPlotter()\u001b[39m.\u001b[39mexport(\n\u001b[0;32m      3\u001b[0m         f[i], root_list\u001b[39m=\u001b[39m[node \u001b[39mfor\u001b[39;00m node \u001b[39min\u001b[39;00m f[i]],\n\u001b[0;32m      4\u001b[0m     )\n",
+      "\u001b[1;31mNameError\u001b[0m: name 'ForestPlotter' is not defined"
+     ]
+    }
+   ],
    "source": [
     "for i in range(0, len(f)):\n",
     "    ForestPlotter().export(\n",
@@ -1332,7 +1346,6 @@
        " '\\\\supsub']"
       ]
      },
-     "execution_count": 21,
      "metadata": {},
      "output_type": "display_data"
     }
@@ -1412,7 +1425,6 @@
        " '\\\\supsub']"
       ]
      },
-     "execution_count": 22,
      "metadata": {},
      "output_type": "display_data"
     }
@@ -1565,7 +1577,6 @@
        "  '[MARK]']]"
       ]
      },
-     "execution_count": 23,
      "metadata": {},
      "output_type": "display_data"
     }
@@ -1623,11 +1634,9 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "e7370f93d1d0cde622a1f8e1c04877d8463912d04d973331ad4851f04de6915a"
-  },
   "kernelspec": {
-   "display_name": "Python 3.8.5 64-bit",
+   "display_name": "Python 3.10.4 64-bit",
+   "language": "python",
    "name": "python3"
   },
   "language_info": {
@@ -1640,9 +1649,14 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.10.4"
   },
-  "orig_nbformat": 4
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
+  }
  },
  "nbformat": 4,
  "nbformat_minor": 2
diff --git a/examples/tokenizer/tokenizer.ipynb b/examples/tokenizer/tokenizer.ipynb
index 0f6e8ef5..5d14dada 100644
--- a/examples/tokenizer/tokenizer.ipynb
+++ b/examples/tokenizer/tokenizer.ipynb
@@ -2,23 +2,89 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 2,
    "id": "edfef487",
    "metadata": {},
    "outputs": [],
    "source": [
-    "from EduNLP.Tokenizer import PureTextTokenizer, TextTokenizer, get_tokenizer"
+    "from EduNLP.Tokenizer import CharTokenizer, SpaceTokenizer, CustomTokenizer, PureTextTokenizer, AstFormulaTokenizer, get_tokenizer"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "8a9d344c",
+   "metadata": {},
+   "source": [
+    "# Basic Tokenizers\n",
+    "\n",
+    "The basic tokenization containers currently available include:\n",
+    "\n",
+    "- CharTokenizer\n",
+    "- SpaceTokenizer\n",
+    "- CustomTokenizer\n",
+    "- PureTextTokenizer\n",
+    "- AstFormulaTokenizer\n",
+    "\n",
+    "Here are more examples for each of them."
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "90106799",
+   "id": "71450b8a",
+   "metadata": {},
+   "source": [
+    "## CustomTokenizer"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "2ec7f73b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['文具店', '[FORMULA]', '练习本', '卖出', '剩', '[FORMULA]', '包', '每包', '[FORMULA]', '卖出']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = [{\n",
+    "        \"stem\": \"文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？\",\n",
+    "        \"options\": [\"1\", \"2\"]\n",
+    "        }]\n",
+    "tokenizer = get_tokenizer(\"custom\", symbol='f')\n",
+    "\n",
+    "tokens = tokenizer(items, key = lambda x: x['stem'])\n",
+    "print(next(tokens))\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "257f6006",
    "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['已知', '集合', '[FORMULA]', '[FORMULA]']\n"
+     ]
+    }
+   ],
    "source": [
-    "# TextTokenizer and PureTextTokenizer\n",
+    "items = [{\n",
+    "        \"stem\": \"已知集合$A=\\\\left\\\\{x \\\\mid x^{2}-3 x-4<0\\\\right\\\\}, \\\\quad B=\\\\{-4,1,3,5\\\\}, \\\\quad$ 则 $A \\\\cap B=$\",\n",
+    "        \"options\": [\"1\", \"2\"]\n",
+    "        }]\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"custom\", symbol='f')\n",
     "\n",
-    "- ‘text’ Tokenizer symbolizes the FormulaFigures as [FUMULA] and tokenize latex Formulas as Text\n",
-    "- ‘pure_text’ Tokenizer ignores and skips the FormulaFigures and tokenize latex Formulas as Text"
+    "tokens = tokenizer(items, key=lambda x: x[\"stem\"])\n",
+    "print(next(tokens))"
    ]
   },
   {
@@ -26,12 +92,38 @@
    "id": "f78cdae1",
    "metadata": {},
    "source": [
-    "## TextTokenizer"
+    "## CharTokenizer\n",
+    "    "
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 5,
+   "id": "ab08e850",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['文', '具', '店', '有', '$', '600', '$', '本', '练', '习', '本', '卖', '出', '一', '些', '后', '还', '剩', '$', '4', '$', '包', '每', '包', '$', '25', '$', '本', '卖', '出', '多', '少', '本']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = [{\n",
+    "        \"stem\": \"文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？\",\n",
+    "        \"options\": [\"1\", \"2\"]\n",
+    "        }]\n",
+    "tokenizer = get_tokenizer(\"char\", stop_words = set(\"，？\"))\n",
+    "\n",
+    "tokens = tokenizer(items, key = lambda x: x['stem'])\n",
+    "print(next(tokens))\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
    "id": "0cf5f950",
    "metadata": {},
    "outputs": [
@@ -39,7 +131,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "['已知', '集合', 'A', '=', '\\\\left', '\\\\{', 'x', '\\\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<', '0', '\\\\right', '\\\\}', ',', '\\\\quad', 'B', '=', '\\\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\\\}', ',', '\\\\quad', 'A', '\\\\cap', 'B', '=']\n"
+      "['已', '知', '集', '合', '$', 'A', '=', '\\\\', 'left', '\\\\', '{', 'x', '\\\\', 'mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<', '0', '\\\\', 'right', '\\\\', '}', ',', '\\\\', 'quad', 'B', '=', '\\\\', '{', '-', '4', ',', '1', ',', '3', ',', '5', '\\\\', '}', ',', '\\\\', 'quad', '$', '则', '$', 'A', '\\\\', 'cap', 'B', '=', '$']\n"
      ]
     }
    ],
@@ -49,14 +141,23 @@
     "        \"options\": [\"1\", \"2\"]\n",
     "        }]\n",
     "\n",
-    "tokenizer = get_tokenizer(\"text\") # tokenizer = TextTokenizer()\n",
+    "tokenizer = get_tokenizer(\"char\")\n",
     "tokens = tokenizer(items, key=lambda x: x[\"stem\"])\n",
     "print(next(tokens))"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "a132f7e4",
+   "metadata": {},
+   "source": [
+    "## SpaceTokenizer\n",
+    "    "
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 7,
    "id": "36c32fb2",
    "metadata": {},
    "outputs": [
@@ -64,15 +165,41 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "['公式', '[FORMULA]', '如图', '[FIGURE]', 'x', ',', 'y', '约束条件', '公式', '[FORMULA]', '[SEP]', 'z', '=', 'x', '+', '7', 'y', '最大值', '[MARK]']\n"
+      "['文具店有', '$600$', '本练习本，卖出一些后，还剩', '$4$', '包，每包', '$25$', '本，卖出多少本？']\n"
      ]
     }
    ],
    "source": [
-    "items = [\"有公式$\\\\FormFigureID{1}$，如图$\\\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\\\FormFigureBase64{2}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\"]\n",
+    "items = ['文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？']\n",
     "\n",
-    "tokenizer = get_tokenizer(\"text\") # tokenizer = TextTokenizer()\n",
-    "tokens = tokenizer(items)\n",
+    "tokenizer = get_tokenizer(\"space\", stop_words = [])\n",
+    "tokens= tokenizer(items)\n",
+    "\n",
+    "print(next(tokens))\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "fc62535e",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['已知集合$A=\\\\left\\\\{x', '\\\\mid', 'x^{2}-3', 'x-4<0\\\\right\\\\},', '\\\\quad', 'B=\\\\{-4,1,3,5\\\\},', '\\\\quad$', '则', '$A', '\\\\cap', 'B=$']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = [{\n",
+    "        \"stem\": \"已知集合$A=\\\\left\\\\{x \\\\mid x^{2}-3 x-4<0\\\\right\\\\}, \\\\quad B=\\\\{-4,1,3,5\\\\}, \\\\quad$ 则 $A \\\\cap B=$\",\n",
+    "        \"options\": [\"1\", \"2\"]\n",
+    "        }]\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"space\", stop_words = [])\n",
+    "tokens = tokenizer(items, key=lambda x: x[\"stem\"])\n",
     "print(next(tokens))"
    ]
   },
@@ -86,7 +213,55 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 9,
+   "id": "b44452c0",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['文具店', '600', '练习本', '卖出', '剩', '4', '包', '每包', '25', '卖出']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = ['文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？']\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"pure_text\", stop_words = [])\n",
+    "tokens= tokenizer(items)\n",
+    "\n",
+    "print(next(tokens))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "a25f8c4b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['已知', '集合', 'A', '=', '\\\\left', '\\\\{', 'x', '\\\\mid', 'x', '^', '{', '2', '}', '-', '3', 'x', '-', '4', '<', '0', '\\\\right', '\\\\}', ',', '\\\\quad', 'B', '=', '\\\\{', '-', '4', ',', '1', ',', '3', ',', '5', '\\\\}', ',', '\\\\quad', 'A', '\\\\cap', 'B', '=']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = [{\n",
+    "        \"stem\": \"已知集合$A=\\\\left\\\\{x \\\\mid x^{2}-3 x-4<0\\\\right\\\\}, \\\\quad B=\\\\{-4,1,3,5\\\\}, \\\\quad$ 则 $A \\\\cap B=$\",\n",
+    "        \"options\": [\"1\", \"2\"]\n",
+    "        }]\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"pure_text\", stop_words = [])\n",
+    "tokens = tokenizer(items, key=lambda x: x[\"stem\"])\n",
+    "print(next(tokens))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
    "id": "a8f7e65b",
    "metadata": {},
    "outputs": [
@@ -101,7 +276,85 @@
    "source": [
     "items = [\"有公式$\\\\FormFigureID{1}$，如图$\\\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\\\FormFigureBase64{2}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\"]\n",
     "\n",
-    "tokenizer = get_tokenizer(\"pure_text\") # tokenizer = PureTextTokenizer()\n",
+    "tokenizer = get_tokenizer(\"pure_text\") \n",
+    "tokens = tokenizer(items)\n",
+    "print(next(tokens))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "06f488f8",
+   "metadata": {},
+   "source": [
+    "## AstFormulaTokenizer"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "22aeab6f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['文具店', 'textord', 'textord', 'textord', '练习本', '卖出', '剩', 'textord', '包', '每包', 'textord', 'textord', '卖出']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = ['文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？']\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"ast_formula\")\n",
+    "tokens= tokenizer(items)\n",
+    "\n",
+    "print(next(tokens))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "f577f8c2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['已知', '集合', 'mathord_0', '=', 'mathord_1', '\\\\mid', 'mathord_1', 'textord', '{ }', '\\\\supsub', '-', 'textord', 'mathord_1', '-', 'textord', '<', 'textord', '\\\\{', ',', 'mathord_2', '=', '\\\\{', '-', 'textord', ',', 'textord', ',', 'textord', ',', 'textord', '\\\\}', ',', 'mathord_0', '\\\\cap', 'mathord_2', '=']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = [{\n",
+    "        \"stem\": \"已知集合$A=\\\\left\\\\{x \\\\mid x^{2}-3 x-4<0\\\\right\\\\}, \\\\quad B=\\\\{-4,1,3,5\\\\}, \\\\quad$ 则 $A \\\\cap B=$\",\n",
+    "        \"options\": [\"1\", \"2\"]\n",
+    "        }]\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"ast_formula\")\n",
+    "tokens = tokenizer(items, key=lambda x: x[\"stem\"])\n",
+    "print(next(tokens))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "5b78d28c",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['公式', '[FORMULA]', '如图', '[FIGURE]', 'mathord_0', ',', 'mathord_1', '约束条件', '公式', '[FORMULA]', '[SEP]', 'mathord_2', '=', 'mathord_0', '+', 'textord', 'mathord_1', '最大值', '[MARK]']\n"
+     ]
+    }
+   ],
+   "source": [
+    "items = [\"有公式$\\\\FormFigureID{1}$，如图$\\\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\\\FormFigureBase64{2}$,$\\\\SIFSep$，则$z=x+7 y$的最大值为$\\\\SIFBlank$\"]\n",
+    "\n",
+    "tokenizer = get_tokenizer(\"ast_formula\") \n",
     "tokens = tokenizer(items)\n",
     "print(next(tokens))"
    ]
@@ -120,7 +373,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 15,
    "id": "fd96e001",
    "metadata": {},
    "outputs": [],
@@ -138,7 +391,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 16,
    "id": "6f090e92",
    "metadata": {},
    "outputs": [
@@ -175,7 +428,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 17,
    "id": "6c222cd8",
    "metadata": {},
    "outputs": [
@@ -187,9 +440,9 @@
       "\n",
       "19 ['已知', '公式', \\FormFigureID{1}, '如图', '[FIGURE]', 'mathord', ',', 'mathord', '约束条件', '公式', [FORMULA], 'mathord', '=', 'mathord', '+', 'textord', 'mathord', '最大值', '[MARK]']\n",
       "\n",
-      "2 [['[TEXT_BEGIN]', '已知', '公式', '[FORMULA_BEGIN]', \\FormFigureID{1}, '[TEXT_BEGIN]', '如图', '[FIGURE]', '[FORMULA_BEGIN]', 'mathord', ',', 'mathord', '[TEXT_BEGIN]', '约束条件', '公式', '[FORMULA_BEGIN]', [FORMULA], '[SEP]'], ['[FORMULA_BEGIN]', 'mathord', '=', 'mathord', '+', 'textord', 'mathord', '[TEXT_BEGIN]', '最大值', '[MARK]']]\n",
+      "5 [['[TEXT_BEGIN]', '已知', '公式', '[FORMULA_BEGIN]', \\FormFigureID{1}, '[TEXT_BEGIN]', '如图', '[FIGURE]', '[TEXT_BEGIN]', '[FORMULA_BEGIN]', 'mathord', ',', 'mathord', '[TEXT_BEGIN]', '约束条件', '公式', '[FORMULA_BEGIN]', [FORMULA], '[TEXT_BEGIN]', '[SEP]'], ['[TEXT_BEGIN]'], ['[FORMULA_BEGIN]', 'mathord', '=', 'mathord', '+', 'textord', 'mathord'], ['[TEXT_BEGIN]', '最大值'], ['[MARK]']]\n",
       "\n",
-      "2 [['[TEXT_BEGIN]', '已知', '公式', '[TEXT_END]', '[FORMULA_BEGIN]', \\FormFigureID{1}, '[FORMULA_END]', '[TEXT_BEGIN]', '如图', '[TEXT_END]', '[FIGURE]', '[FORMULA_BEGIN]', 'mathord', ',', 'mathord', '[FORMULA_END]', '[TEXT_BEGIN]', '约束条件', '公式', '[TEXT_END]', '[FORMULA_BEGIN]', [FORMULA], '[FORMULA_END]', '[SEP]'], ['[FORMULA_BEGIN]', 'mathord', '=', 'mathord', '+', 'textord', 'mathord', '[FORMULA_END]', '[TEXT_BEGIN]', '最大值', '[TEXT_END]', '[MARK]']]\n"
+      "5 [['[TEXT_BEGIN]', '已知', '公式', '[TEXT_END]', '[FORMULA_BEGIN]', \\FormFigureID{1}, '[FORMULA_END]', '[TEXT_BEGIN]', '如图', '[TEXT_END]', '[FIGURE]', '[TEXT_BEGIN]', '[TEXT_END]', '[FORMULA_BEGIN]', 'mathord', ',', 'mathord', '[FORMULA_END]', '[TEXT_BEGIN]', '约束条件', '公式', '[TEXT_END]', '[FORMULA_BEGIN]', [FORMULA], '[FORMULA_END]', '[TEXT_BEGIN]', '[TEXT_END]', '[SEP]'], ['[TEXT_BEGIN]', '[TEXT_END]'], ['[FORMULA_BEGIN]', 'mathord', '=', 'mathord', '+', 'textord', 'mathord', '[FORMULA_END]'], ['[TEXT_BEGIN]', '最大值', '[TEXT_END]'], ['[MARK]']]\n"
      ]
     }
    ],
@@ -221,11 +474,9 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "776957673adb719a00031a24ed5efd2fa5ce8a13405e5193f8d278edd3805d55"
-  },
   "kernelspec": {
-   "display_name": "Python 3.6.13 64-bit ('data': conda)",
+   "display_name": "Python 3.10.4 64-bit",
+   "language": "python",
    "name": "python3"
   },
   "language_info": {
@@ -238,7 +489,12 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.13"
+   "version": "3.10.4"
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "2469a70536e4d2335a2ea8907942d0699c37342a371ac185bdb5b0aa6f073890"
+   }
   }
  },
  "nbformat": 4,
diff --git a/pytest.ini b/pytest.ini
index 603d9c8c..f8d2199c 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,6 +1,6 @@
 [pytest]
 # For pytest usage, refer to https://hb4dsai.readthedocs.io/zh/latest/Architecture/Test.html
-norecursedirs = docs *build* trash dev examples EduNLP/Formula/viz EduNLP/Formula/ast scripts
+norecursedirs = docs *build* trash dev examples EduNLP/Formula/viz EduNLP/Formula/ast scripts data
 
 # Deal with marker warnings
 markers =
diff --git a/setup.py b/setup.py
index db31dff5..05df9b00 100644
--- a/setup.py
+++ b/setup.py
@@ -10,6 +10,7 @@
     'pytest>=4',
     'pytest-cov>=2.6.0',
     'pytest-flake8',
+    'flake8<5.0.0'
 ]
 docs_deps = [
     'sphinx',
@@ -30,12 +31,16 @@
     import sys
 
     if 5 <= sys.version_info[1]:
-        ml_pytorch_deps = ["torch"]
+        ml_pytorch_deps = ["torch<=1.12.1"]
     else:
         ml_pytorch_deps = []
         logging.warning("Current python version %s is not supported by pytorch", str(sys.version_info[:2]))
 
-vec_deps = ['gensim'] + ml_pytorch_deps + ['transformers'] + ['torchvision']
+vec_deps = [
+    'gensim',
+    'transformers',
+    'torchvision',
+    'datasets'] + ml_pytorch_deps
 
 setup(
     name='EduNLP',
diff --git a/static/test_data/OpenLUNA.json b/static/test_data/OpenLUNA.json
deleted file mode 100644
index 2353178b..00000000
--- a/static/test_data/OpenLUNA.json
+++ /dev/null
@@ -1,792 +0,0 @@
-{"stem": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$", "options": "['\\{-4,1\\}', '\\{1,5\\}', '\\{3,5\\}', '\\{1,3\\}']", "type": 6}
-{"stem": "若复数$z=1+2 i+i^{3}$，则$|z|=$", "options": "['0', '1', '$\\sqrt{2}$', '2']", "type": 6}
-{"stem": "埃及胡夫金字塔是古代世界建筑奇迹之一，它的形状可视为一个正四棱锥。以该四棱锥的高为边长的正方形面积等于该四棱锥一个侧面三角形的面积，则其侧面三角形底边上的高与底面正方形的边长的比值为$\\FigureID{3bf20b90-8af1-11eb-8bad-b46bfc50aa29}$$\\FigureID{59b851d2-8af1-11eb-b84e-b46bfc50aa29}$$\\FigureID{6310d374-8b75-11eb-8c4f-b46bfc50aa29}$$\\FigureID{6a006174-8b76-11eb-9c6a-b46bfc50aa29}$$\\FigureID{088f15e6-8b7c-11eb-9949-b46bfc50aa29}$", "options": "['$\\\\frac{\\\\sqrt{5}-1}{4}$', '$\\\\frac{\\\\sqrt{5}-1}{2}$', '$\\\\frac{\\\\sqrt{5}+1}{4}$', '$\\\\frac{\\\\sqrt{5}+1}{2}$']", "type": 6}
-{"stem": "设O为正方形$ABCD$中心，在$O, A, B, C, D$中任取3点，则取到的3点共线的概率为", "options": "['$\\\\frac{1}{5}$', '$\\\\frac{2}{5}$', '$\\\\frac{1}{2}$', '$\\\\frac{4}{5}$']", "type": 6}
-{"stem": "某校一个课外学习小组为研究某作物的发芽率y和温度x（单位：$^{\\circ} \\mathrm{C}$）的关系，在20个不同温度条件下进行种子发芽实验，由实验数据$\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20)$得到下面的散点图：由此散点图，在10$^{\\circ} \\mathrm{C}$至40$^{\\circ} \\mathrm{C}$之间，下面四个回归方程类型中最适宜作为发芽率y和温度x的回归方程类型的是$\\FigureID{3bf20b91-8af1-11eb-86ff-b46bfc50aa29}$$\\FigureID{59b851d3-8af1-11eb-bd45-b46bfc50aa29}$$\\FigureID{6310d375-8b75-11eb-bf70-b46bfc50aa29}$$\\FigureID{6a006175-8b76-11eb-aa57-b46bfc50aa29}$$\\FigureID{088f15e7-8b7c-11eb-a8aa-b46bfc50aa29}$", "options": "['$y=a+b x$', '$y=a+b x^{2}$', '$y=a+b e^{x}$', '$y=a+b \\\\ln x$']", "type": 6}
-{"stem": "已知圆$x^{2}+y^{2}-6 x=0$，过点(1,2)的直线被该圆所截得的弦的长度的最小值为", "options": "['1', '2', '3', '4']", "type": 6}
-{"stem": "设函数$f(x)=\\cos \\left(\\omega x+\\frac{\\pi}{6}\\right)$ 在 $[-\\pi, \\pi]$的图像大致如下图，则$f(x)$的最小周期为$\\FigureID{3bf20b92-8af1-11eb-a0fd-b46bfc50aa29}$$\\FigureID{59b88b3e-8af1-11eb-a322-b46bfc50aa29}$$\\FigureID{63113d12-8b75-11eb-bdfd-b46bfc50aa29}$$\\FigureID{6a006176-8b76-11eb-aab8-b46bfc50aa29}$$\\FigureID{088f15e8-8b7c-11eb-8a85-b46bfc50aa29}$", "options": "['$\\\\frac{10 \\\\pi}{9}$', '$\\\\frac{7 \\\\pi}{6}$', '$\\\\frac{4\\\\pi}{3}$', '$\\\\frac{3 \\\\pi}{2}$']", "type": 6}
-{"stem": "设对数$a \\log _{3} 4=2,$ 则 $4^{-a}=$", "options": "['$\\\\frac{1}{16}$', '$\\\\frac{1}{9}$', '$\\\\frac{1}{8}$', '$\\\\frac{1}{6}$']", "type": 6}
-{"stem": "执行右面的程序框图，则输出的n=$\\FigureID{3bf20b93-8af1-11eb-b205-b46bfc50aa29}$$\\FigureID{59b88b3f-8af1-11eb-9450-b46bfc50aa29}$$\\FigureID{63116570-8b75-11eb-b694-b46bfc50aa29}$$\\FigureID{6a006177-8b76-11eb-9ac0-b46bfc50aa29}$$\\FigureID{088f15e9-8b7c-11eb-959f-b46bfc50aa29}$", "options": "{'1': '9', '2': '3'}", "type": 6}
-{"stem": "设$\\left\\{a_{n}\\right\\}$是等比数列，且$a_{1}+a_{2}+a_{3}=1, a_{2}+a_{3}+a_{4}=2,$ 则 $a_{6}+a_{7}+a_{8}=$", "options": "{'1': '2', '2': '4', '3': '2'}", "type": 6}
-{"stem": "设$F_{1}, F_{2}$是双曲线$C: x^{2}-\\frac{y^{2}}{3}=1$的两个焦点，$O$为坐标原点，点$P$在$C$上且$|O P|=2$，则$\\triangle P F_{1} F_{2}$的面积为", "options": "['$\\\\frac{7}{2}$', '3', '$\\\\frac{5}{2}$', '2']", "type": 6}
-{"stem": "已知$A, B, C$为球$O$的球面上的三个点，$\\odot O_{1}$ 为 $\\triangle A B C$ 的外接圆，若 $\\odot O_{1}$ 的面积为 $4 \\pi$，$A B=B C=A C=O O_{1},$ 则球 $O$ 的表面积为", "options": "['$64 \\\\pi$', '$48 \\\\pi$', '$36 \\\\pi$', '$32 \\\\pi$']", "type": 6}
-{"stem": "若$x,y$满足约束条件$\\left\\{\\begin{array}{c}2 x+y-2 \\leq 0 \\ x-y-1 \\geq 0 \\ y+1 \\geq 0\\end{array}\\right.$，则$z=x+7 y$的最大值为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "设向量$a=(1,-1), \\quad b=(m+1,2 m-4)$，若$a \\perp b$，则$m=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "曲线$y=\\ln x+x+1$的一条切线的斜率为2，则该切线的方程为_______", "options": "[]", "type": 2}
-{"stem": "数列$\\left\\{a_{n}\\right\\}$满足$a_{n+2}+(-1)^{n} a_{n}=3 n-1$，前16项和为540，则$\\left\\{a_{1}\\right\\}=$_______", "options": "[]", "type": 2}
-{"stem": "某厂接受了一项加工业务，加工出来的产品（单位：件）按标准分为$A, B, C, D$四个等级。加工业务约定：对于A级品，B级品，C级品，厂家每件分别收取加工费90元，50元，20元；对于D级品，厂家每件要赔偿原料损失费50元。该厂有甲、乙两个分厂可承接加工业务，甲分厂加工成本费为25元/件，乙分厂加工成本费为20元/件。厂家为决定由哪个分厂承接加工业务，在两个分厂各试加工了100件这种产品，并统计了这些产品的等级，整理如下：分别估计甲、乙两分厂加工出来的一件产品为A级品的概率；分别求甲、乙两分厂加工出来的100件产品的平均利润，以平均利润为依据，厂家应选哪个分厂承接加工业务？", "options": "[]", "type": 4}
-{"stem": "$\\triangle A B C$ 的内角为 $A, \\quad B, \\quad C$的对边分别为$a, b, c$，已知$B=150^{\\circ}$。若$a=\\sqrt{3} c, \\quad b=2 \\sqrt{7}, \\quad$ 求 $\\triangle A B C$ 的面积；若$\\sin A+\\sqrt{3} \\sin C=\\frac{\\sqrt{2}}{2}, \\quad$ 求 $C$", "options": "[]", "type": 4}
-{"stem": "如图，$D$ 为圆锥的顶点，O是圆锥底面的圆心，$\\triangle A B C$是底面的内接正三角形，$P$ 为DO上一点，$\\angle A P C=90^{\\circ}$。证明：平面$P A B \\perp$平面$P A C $设$D O=\\sqrt{2}$，圆锥的侧面积为$\\sqrt{3} \\pi$，求三棱锥$P-A B C$的体积。$\\FigureID{3bf20b94-8af1-11eb-b971-b46bfc50aa29}$$\\FigureID{59b8b3ba-8af1-11eb-91d4-b46bfc50aa29}$$\\FigureID{63117634-8b75-11eb-b90f-b46bfc50aa29}$$\\FigureID{6a006178-8b76-11eb-84a0-b46bfc50aa29}$$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=e^{x}-a(x+2)$当$a=1$时，讨论$f(x)$的单调性；若$f(x)$有两个零点，求a的取值范围", "options": "[]", "type": 4}
-{"stem": "已知A,B分别为椭圆$E: \\frac{x^{2}}{a^{2}}+y^{2}=1 \\quad a>1$的左、右顶点，$G$ 为$E$的上顶点， $\\overrightarrow{A G} \\cdot \\overrightarrow{G B}=8$。$P$为直线$x=6$的动点，$P A $与$ E$的另一交点为 $C$, $PB$与$E$的另一交点为$D$求$E$的方程证明：直线$CD$过定点", "options": "[]", "type": 4}
-{"stem": "[选修4-4:坐标系与参数方程]\n在直角坐标系$xOy$中，曲线$C_1$的参数方程为$\\left\\{\\begin{array}{l}x=\\cos ^{k} t \\ y=\\sin ^{k} t\\end{array}\\right.$（t为参数），以坐标原点为极点，x轴正半轴为极轴建立极坐标系，曲线$C_2$的极坐标方程为$4 \\rho \\cos \\theta-16 \\rho \\sin \\theta+3=0$当$k=1$时，$C_1$是什么曲线？当$k=4$时，求$C_1$与$C_2$的公共点的直角坐标", "options": "[]", "type": 4}
-{"stem": "[选修4-5:不等式选讲]\n已知函数$f(x)=|3 x+1|-2|x|$画出$y=f(x)$的图像求不等式$f(x)>f(x+1)$的解集$\\FigureID{3bf2ddf4-8af1-11eb-b750-b46bfc50aa29}$$\\FigureID{59b8bd14-8af1-11eb-93a5-b46bfc50aa29}$$\\FigureID{63118b3a-8b75-11eb-a5c0-b46bfc50aa29}$$\\FigureID{6a006179-8b76-11eb-b386-b46bfc50aa29}$$\\FigureID{088f15eb-8b7c-11eb-a86f-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "1. 已知集合 $A=\\{x||x|<3, x \\in Z\\}, \\quad B=\\{x||x|>1, x \\in \\mathbf{Z}\\}, \\quad$ 则 $A \\cap B=$", "options": "['$\\\\varnothing$', '$\\\\{-3,-2,2,3\\\\}$', '$\\\\{-2,0,2\\\\}$', '$\\\\{-2,2\\\\}$']", "type": 6}
-{"stem": "复数 $(1-i)^{4}=$", "options": "['-4', '4', '$-4i$', '$4i$']", "type": 6}
-{"stem": "如图，将钢琴上的 12 个键依次记为 $a_{1}, a_{2}, \\cdots a_{12},$ 设 $1 \\leq i \\leq j \\leq k \\leq 12$.若 $k-j=3$ 且 $j-i=4$，\n则称 $a_{i}, a_{j}, a_{k}$ 为原位大三和弦; 若 $k-j=4$ 且 $j-i=3,$ 则称 $a_{i}, a_{j}, a_{k}$ 为原位小三和弦. 用这12 个键可以构成的原位大三和弦与原位小三和弦的个数之和为 组合$\\FigureID{3bf2e300-8af1-11eb-8c06-b46bfc50aa29}$$\\FigureID{59b8bd15-8af1-11eb-a072-b46bfc50aa29}$$\\FigureID{0890127e-8b7c-11eb-8c56-b46bfc50aa29}$", "options": "['5', '8', '10', '15']", "type": 6}
-{"stem": "在新冠肺炎疫情防控期间，某超市开通网上销售业务，每天能完成 1200 份订单的配货，由于订单量大幅增加，导致订单积压。为解决困难，许多志愿者踊跃报名参加配货工作。已知该超市某日积压 500 份订单未配货，预计第二天的新订单超过 1600 份的概率为 0.05，志愿者每人每天能完成 50 份订单的配货，为使第二天完成积医订单及当日订单的配货的椎率不小于 0.95，则至少需要志愿者", "options": "['10名', '18名', '24名', '32名']", "type": 6}
-{"stem": "已知单位向量 $a, b$ 的夹角为 $60^{\\circ},$ 则下列向量中，与 $b$ 垂直的是", "options": "['$a+2b$', '$2a+b$', '$a-2b$', '$2a-b$']", "type": 6}
-{"stem": "记 $S_{n}$ 为等比数列 $\\left\\{a_{n}\\right\\}$ 的前 $n$ 项和. 若 $a_{5}-a_{3}=12, \\quad a_{6}-a_{4}=24,$ 则 $\\frac{S_{n}}{a_{n}}=$", "options": "['$2^{n}-1$', '$2-2^{1-n}$', '$2-2^{n-1}$', '$2^{1-n}-1$']", "type": 6}
-{"stem": "执行右面的程序框图，若输入 $k=0, \\quad a=0,$ 则输出的 $k$ 为$\\FigureID{3bf30514-8af1-11eb-9ac1-b46bfc50aa29}$$\\FigureID{59b8ecd0-8af1-11eb-aeef-b46bfc50aa29}$$\\FigureID{08903994-8b7c-11eb-a14c-b46bfc50aa29}$", "options": "['2', '3', '4', '5']", "type": 6}
-{"stem": "若过点 (2,1)的圆与两坐标轴都相切，则圆心到直线 $2x-y-3=0$ 的距离为", "options": "['$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{2\\\\sqrt{5}}{5}$', '$\\\\frac{3\\\\sqrt{5}}{5}$', '$\\\\frac{4\\\\sqrt{5}}{5}$']", "type": 6}
-{"stem": "设O为坐标原点，直线 $x=a$ 与双曲线 $\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$ 的两条渐近线分别交于$D, E$ 两点.若 $\\Delta O D E$ 的面积为 $8,$ 则 $C$ 的焦距的最小值为", "options": "['4', '8', '16', '32']", "type": 6}
-{"stem": "设函数 $f(x)=x^{3}-\\frac{1}{x^{3}},$ 则 $f(x)$", "options": "['是奇函数，且在 $(0,+\\\\infty)$ 单调递增', '是奇函数，且在 $(0,+\\\\infty)$ 单调递减', '是偶函数，且在 $(0,+\\\\infty)$ 单调递增', '是偶函数，且在 $(0,+\\\\infty)$ 单调递减']", "type": 6}
-{"stem": "已知 $\\triangle A B C$ 是面积为 $\\frac{9 \\sqrt{3}}{4}$ 的等边三角形，且其顶点都在球 $O$ 的球面上，若球 $O$ 的表面积为16 $\\pi,$ 则 $O$ 到平面 $A B C$ 的距离为", "options": "['$\\\\sqrt{3}$', '$\\\\frac{3}{2}$', '1', '$\\\\frac{\\\\sqrt{3}}{2}$']", "type": 6}
-{"stem": "对数函数 导数 若 $2^{x}-2^{y}<3^{-x}-3^{-y}$，则", "options": "['$\\\\ln (y-x+1)>0$', '$\\\\ln (y-x+1)<0$', '$\\\\ln |x-y|>0$', '$\\\\ln |x-y|<0$']", "type": 6}
-{"stem": "若 $\\sin x=-\\frac{2}{3},$ 则 $\\cos 2 \\mathrm{x}=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "记 $S_{n}$为等差数列 $\\left\\{a_{n}\\right\\}$ 的前 $n$ 项和，若 $a_{1}=-2, \\quad a_{2}+a_{6}=2,$ 则 $S_{10}=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "若 $x, y$ 满足约束条件$\\left\\{\\begin{array}{l}x+y \\geq-1 \\ x-y \\geq-1 \\ 2 x-y \\leq 1\\end{array}\\right.$,则 $z=x+2 y$ 的最大值是$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "设有下列四个命题:\n$p_{1}:$ 两两相交且不过同一点的三条直线必在同一平面内.\n$p_{2}:$ 过空间中任意三点有且仅有一一个平面.\n$p_{3}:$ 若空间两条直线不相交，则这两条直线平行.\n$p_{4}:$ 若直线 $l \\subset$ 平面 $\\alpha,$ 直线 $m \\perp$ 平面 $\\alpha,$ 则 $m \\perp l$.\n则下述命题中所有真命题的序号是$\\SIFBlank$\n$①p_{1} \\wedge p_{4}$ $②p_{1} \\wedge p_{2}$ $③\\neg p_{2} \\vee p_{3}$ $④\\neg p_{3} \\vee \\neg p_{4}$ ", "options": "[]", "type": 2}
-{"stem": "$\\Delta A B C$ 的内角 $A, B, C$ 的对边分别为 $a, b, c, \\quad$ 已知 $\\cos ^{2}\\left(\\frac{\\pi}{2}+A\\right)+\\cos A=\\frac{5}{4}$求 $A$$b-c=\\frac{\\sqrt{3}}{3} a,$ 证明: $\\Delta A B C$ 是直角三角形", "options": "[]", "type": 4}
-{"stem": "某沙漠地区经过治理，生态系统得到很大改普，野生动物数量有所增加.为调查该地区\n某种野生动物的数量，将其分成面积相近的 200 个地块，从这些地块中用简单随机抽样\n的方法抽取 20 个作为样区，调查得到样本数据 $\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20),$ 其中 $x_{i}$ 和 $y_{i}$ 分\n别表示第 $i$ 个样区的植物覆盖面积（单位：公顷）和这种野生动物的数量，并计算得$\\sum_{i=1}^{20} x_{i}=60 \\quad, \\quad \\sum_{i=1}^{20} y_{i}=1200 \\quad, \\quad \\sum_{i=1}^{20}\\left(x_{i}-\\bar{x}\\right)^{2}=80 \\quad, \\quad \\sum_{i=1}^{20}\\left(\\mathrm{y}_{i}-\\bar{y}\\right)^{2}=9000$\n$\\sum_{i=1}^{20}\\left(x_{i}-\\bar{x}\\right)\\left(\\mathrm{y}_{i}-\\bar{y}\\right)=800$求该地区这种野生动物数量的估计值（这种野生动物数量的估计值等于样区这种野生动物数量的平均数乘以地块数）;求样本 $\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20)$ 的相关系数（精确到 0.01 ）根据现有统计资料，各地块间植物覆盖面积差异很大.为提高样本的代表性以获得该地区这种野生动物数量更准确的估计，请给出一种你认为更合理的抽样方法，并说明理由。附：相关系数 $r=\\frac{\\sum_{i=1}^{n}\\left(x_{i}-\\bar{x}\\right)\\left(\\mathrm{y}_{i}-\\bar{y}\\right)}{\\sqrt{\\sum_{i=1}^{n}\\left(x_{i}-\\bar{x}\\right)^{2} \\sum_{i=1}^{n}\\left(\\mathrm{y}_{i}-\\bar{y}\\right)^{2}}}, \\quad \\sqrt{2} \\approx 1.414$", "options": "[]", "type": 4}
-{"stem": "已知椭圆 $C_{1}: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1(a>b>0)$ 的右焦点 $F$ 与拋物线 $C_{2}$ 的焦点重合 $, \\quad C_{1}$ 的中心\n与C_的顶点重合，过F 且与 $x$ 轴垂直的直线交 $C_{1}$ 于 $A, B$ 两点，交 $C_{2}$ 于C,D 两点\n$|C D|=\\frac{4}{3}|AB|$求 $C_{1}$ 的离心率;若 $C_{1}$ 的四个顶点到 $C_{2}$ 的准线距离之和为12，求 $C_{1}$ 与 $C_{2}$ 的标准方程.", "options": "[]", "type": 4}
-{"stem": "如图，已知三棱柱 $A B C-A_{1} B_{1} C_{1}$ 的底面是正三角形，例面 $B B_{1} C_{1} C$ 是矩形， $M, N$ 分别\n为BC $, B_{1} C_{1}$ 的中点， $P$ 为 $A M$ 上一点，过 $B_{1} C_{1}$ 和 $P$ 的平面交 $A B$ 于 $E,$ 交 $A C$ 于 $F$\n证明: $A A_{1} / / M N , $ 且平面 $A_{1} A M N \\perp$ 平面 $E B_{1} C_{1} F$设 $O$ 为 $\\Delta A_{1} B_{1}C_{1}$ 的中心，若 $AO=A B=6, AO$ // 平面 $EB_{1} C_{1} F,$ 且 $\\angle M P N=\\frac{\\pi}{3}$,求四棱雉 $B-E B_{1} C_{1} F$ 的体积.$\\FigureID{3bf31d4a-8af1-11eb-bc20-b46bfc50aa29}$$\\FigureID{59b8ecd1-8af1-11eb-b68c-b46bfc50aa29}$$\\FigureID{08905bb6-8b7c-11eb-b2ae-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知函数 $f(x)=2 \\ln x+1$若 $f(x) \\leq 2 x+c,$ 求c的取值范野设 $a>0,$ 讨论函数 $g(x)=\\frac{f(x)-f(a)}{x-a}$ 的单调性.", "options": "[]", "type": 4}
-{"stem": "已知 $C_{1}, C_{2}$ 的参数方程分别为 $C_{1}:\\left\\{\\begin{array}{l}x=4 \\cos ^{2} \\theta \\ y=4 \\sin ^{2} \\theta\\end{array},(\\theta \\text { 为参数 }), C_{2}:\\left\\{\\begin{array}{l}x=t+\\frac{1}{t} \\ y=t-\\frac{1}{t}\\end{array},(t \\text { 为参数 })\\right.\\right.$将 $C_{1}, \\quad C_{2}$ 的参数方程化为普通方程 以坐标原点为极点， x轴正半轴为极轴建立极坐标系，设 $C_{1}, \\quad C_{2}$ 的交点为 $P,$ 求圆心在极轴上，且经过极点和 P的圆的极坐标方程。", "options": "[]", "type": 4}
-{"stem": "$f(x)=\\left|x-a^{2}\\right|+|x+2 a-1|$当 $a=2$ 时，求不等式 $f(x) \\geq 4$ 的解集.$f(x) \\geq 4,$ 求 $a$ 的取值范固.", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{1,2,3,5,7,11\\}, \\quad B=\\{x \\mid 3<x<15\\},$ 则 $A \\cap B$中元素的个数为", "options": "['2', '3', '4', '5']", "type": 6}
-{"stem": "复数$\\overline{z}(1+\\mathbf{i})=1-\\mathbf{i}$， 则$z=$", "options": "['$1-\\\\mathbf{i}$', '$1+\\\\mathbf{i}$', '$-\\\\mathbf{i}$', '$\\\\mathbf{i}$']", "type": 6}
-{"stem": "设一组样本数据$x_{1}, x_{2}, \\cdots, x_{n}$的方差为0.01，则数据$10x_{1}, 10x_{2}, \\cdots, 10x_{n}$的方差为", "options": "['0.01', '0.1', '1', '10']", "type": 6}
-{"stem": "Logistic模型是常用数学模型之一，可应用于流行病学领域，有学者根据公布数据建立了某地区新冠肺炎累计确诊病例数 $T(t)$(t的单位：天)的Logistic模型：指数函数 $I(t)=\\frac{K}{1+e^{-0.23(t-53)}}$，其中K为最大确诊病例数，当$I\\left(t^{*}\\right)=0.95 K$，标志着已初步遏制疫情，则$t^{*}$约为对数函数($\\ln 19 \\approx 3$)", "options": "{'6': '9'}", "type": 6}
-{"stem": "已知 $\\sin \\theta+\\sin \\left(\\theta+\\frac{\\pi}{3}\\right)=1$, 则 $\\sin \\left(\\theta+\\frac{\\pi}{6}\\right)=$", "options": "['$\\\\frac{1}{2}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{2}{3}$', '$\\\\frac{\\\\sqrt{2}}{2}$']", "type": 6}
-{"stem": "在平面内, A,B 是两个定点, C是动点，若 $\\overrightarrow{AC} \\cdot \\overrightarrow{BC}=1$, 则C的轨迹为", "options": "['圆', '椭圆', '抛物线', '直线']", "type": 6}
-{"stem": "设$O$为坐标原点，直线 $x=2$与抛物线$y^{2}=2 p x(p>0)$ 交于D, E两点，若 $O D \\perp O E$,则 $C$的焦点坐标为", "options": "['$\\\\left(\\\\frac{1}{4}, 0\\\\right)$', '$\\\\left(\\\\frac{1}{2}, 0\\\\right)$', '$\\\\left(1, 0\\\\right)$', '$\\\\left(2, 0\\\\right)$']", "type": 6}
-{"stem": "点 (0,1) 到直线 $y=k(x+1)$ 距离的最大值为", "options": "['$1$', '$\\\\sqrt{2}$', '$\\\\sqrt{3}$', '$2$']", "type": 6}
-{"stem": "右图为某几何体的三视图，则该几何体的表面积是$\\FigureID{3bf344b6-8af1-11eb-90bb-b46bfc50aa29}$$\\FigureID{59b92b46-8af1-11eb-947e-b46bfc50aa29}$$\\FigureID{08905bb7-8b7c-11eb-838f-b46bfc50aa29}$", "options": "['$6+4\\\\sqrt{2}$', '$4+4\\\\sqrt{2}$', '$6+2\\\\sqrt{3}$', '$4+2\\\\sqrt{3}$']", "type": 6}
-{"stem": "设对数 $a=\\log _{3} 2,  b=\\log _{5} 3,  c=\\frac{2}{3}$,则", "options": "['$a<c<b$', '$a<b<c$', '$b<c<a$', '$c<a<b$']", "type": 6}
-{"stem": "在 $\\triangle A B C$ 中, $\\cos C=\\frac{2}{3}, A C=4,  B C=3,$ 则 $\\tan B=$", "options": "['$\\\\sqrt{5}$', '$2\\\\sqrt{5}$', '$4\\\\sqrt{5}$', '$8\\\\sqrt{5}$']", "type": 6}
-{"stem": "已知函数 $f(x)=\\sin x+\\frac{1}{\\sin x}$, 则", "options": "['$f(x)$的最小值为2', '$f(x)$的图像关于$y$轴对称', '$f(x)$的图像关于直线$x=\\\\pi$轴对称', '$f(x)$的图像关于直线$x=\\\\frac{\\\\pi}{2}$轴对称']", "type": 6}
-{"stem": "若$x,y$满足约束条件$\\left\\{\\begin{array}{l}x+y \\geq 0 \\ 2 x-y \\geq 0 \\ x \\leq 1\\end{array}\\right.$，则$z=3x+4y$的最大值为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "设双曲线 $C: \\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$ 的一条渐近线为 $y=\\sqrt{2} x$, 则 $C$ 的离心率为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "设函数 $f(x)=\\frac{e^{x}}{x+a},$ 若 $f^{\\prime}(1)=\\frac{e}{4},$ 则 $a=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "已知圆锥的底面半径为1，母线长为3，则该圆锥内半径最大的球的体积_______", "options": "[]", "type": 2}
-{"stem": "设等比数列 $\\left\\{a_{n}\\right\\}$ 满足 $a_{1}+a_{2}=4, a_{3}-a_{1}=8$求 $\\left\\{a_{n}\\right\\}$ 的通项公式记 $S_{n}$ 为数列 $\\left\\{\\log _{3} a_{n}\\right\\}$ 的前 $\\mathrm{n}$ 项和. 若 $S_{m}+S_{m+1}=S_{m+3},$ 求 $m$", "options": "[]", "type": 4}
-{"stem": "某学生兴趣小组随机调查了某市100天中每天的空气质量等级和当天到某公园锻炼的人次，整理数据得到下表（单位：天）：\n附: $\\quad K^{2}=\\frac{n(a d-b c)^{2}}{(a+b)(c+d)(a+c)(b+d)}$分别估计该市一天的空气质量等级为1,2,3,4的概率求一天中到该公园锻炼的平均人次的估计值（同一组中的数据用该组区间的中点值为代表）若某天的空气质量等级为1或2，则称这天“空气质量好”；若某天的空气质量等级为3或4，则称这天“空气质量不好”。根据所给数据，完成下面的2x2列联表，并根据列联表，判断是否有95%的把握认为一天中到该公园锻炼的人次与该市当天的空气质量有关？", "options": "[]", "type": 4}
-{"stem": "如图，长方形$A B C D-A_{1} B_{1} C_{1} D_{1}$中, 点 $E , F$ 分别在棱$D D_{1},  B B_{1}$上，且$2 D E=E D_{1}, B F=2 F B_{1}$, 证明 :当$A B=B C$ 时, $E F \\perp A C$点 $C_{1}$ 在平面 $A E F$ 内$\\FigureID{3bf36bcc-8af1-11eb-affd-b46bfc50aa29}$$\\FigureID{59b93b0c-8af1-11eb-947d-b46bfc50aa29}$$\\FigureID{08907e58-8b7c-11eb-bd5a-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知函数 $f(x)=x^{3}-k x+k^{2}$讨论 $f(x)$ 的单调性:若 $f(x)$ 有三个零点, 求 $k$ 的取值范围", "options": "[]", "type": 4}
-{"stem": "已知椭圆 $C: \\frac{x^{2}}{25}+\\frac{y^{2}}{m^{2}}=1(0<m<5)$ 的离心率为 $\\frac{\\sqrt{15}}{4},A,  B$ 分别为$C$的左右顶点求$C$的方程若点 $P$在$C$上，点 $Q$在直线 $x=6$ 上，且 $|B P|=|B Q|,  B P \\perp B Q$, 求 $\\triangle A P Q$ 的面积", "options": "[]", "type": 4}
-{"stem": " 在直角坐标系$xOy$中, 曲线$C$ 的参数方程为$\\left\\{\\begin{array}{l}x=2-t-t^{2} \\ y=2-3 t+t^{2}\\end{array}\\right.$($t$ 为参数且$ t \\neq 1$), $C$与坐标轴交于$A,  B$ 两点求$|AB|$以坐标原点为极点, $x$轴正半轴为极轴建立极坐标系，求直线$AB$ 的极坐标方程.", "options": "[]", "type": 4}
-{"stem": "设 $a, b, c \\in R, a+b+c=0, a b c=1$证明: $a b+b c+c a<0$用 $\\max \\{a, b, c\\}$ 表示 $a, b, c$ 中的最大值，证明: $ \\max \\{a, b, c\\} \\geq \\sqrt[3]{4}$", "options": "[]", "type": 4}
-{"stem": "若复数 $z=1+i$，则 $\\left|z^{2}-2 z\\right|=$", "options": "['0', '1', '$\\sqrt{2}$', '2']", "type": 6}
-{"stem": "设集合 $A=\\left\\{x \\mid x^{2}-4 \\leqslant 0\\right\\}, \\quad B=\\{x \\mid 2 x+a \\leqslant 0\\},$ 且 $A \\cap B=\\{x \\mid-2 \\leq x \\leqslant 1\\},$ 则 $a=$", "options": "['-4', '-2', '2', '4']", "type": 6}
-{"stem": "埃及胡夫金字塔是古代世界建筑奇迹之一，它的形状可视为一个正四棱锥。以该四棱锥的高为边长的正方形面积等于该四棱锥一个侧面三角形的面积，其侧面三角形底边上的高与底面正方形的边长的比值为$\\FigureID{3bf36bcd-8af1-11eb-b278-b46bfc50aa29}$$\\FigureID{59b93b0d-8af1-11eb-896b-b46bfc50aa29}$$\\FigureID{08907e59-8b7c-11eb-8731-b46bfc50aa29}$", "options": "['$\\\\frac{\\\\sqrt{5}-1}{4}$', '$\\\\frac{\\\\sqrt{5}-1}{2}$', '$\\\\frac{\\\\sqrt{5}+1}{4}$', '$\\\\frac{\\\\sqrt{5}+1}{2}$']", "type": 6}
-{"stem": "已知 $A$ 为抛物线 $C: y^{2}=2 p x(p>0)$ 上一点，点 $A$ 到 $C$ 的焦点的距离为12，到 $y$ 轴的距离为9，则 p=", "options": "['2', '3', '6', '9']", "type": 6}
-{"stem": "某校一个课外学习小组为研究某作物种子的发芽率 $y$ 和温度 $x$（单位：$^{\\circ} \\mathrm{C}$）的关系，在20个不同的温度条件下进行种子发芽实验，由实验数据$\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20)$得到下面的散点图：\n由此散点图，在10$^{\\circ} \\mathrm{C}$至40$^{\\circ} \\mathrm{C}$之间，下面四个回归方程类型中最适宜作为发芽率$y$和温度$x$的回归方程类型的是$\\FigureID{3bf392d2-8af1-11eb-a7df-b46bfc50aa29}$$\\FigureID{59b9621e-8af1-11eb-8fc7-b46bfc50aa29}$$\\FigureID{08907e5a-8b7c-11eb-9e69-b46bfc50aa29}$", "options": "['$y=a+b x$', '$y=a+b x^{2}$', '$y=a+b e^{x}$', '$y=a+b \\\\ln x$']", "type": 6}
-{"stem": "函数 $f(x)=x^{4}-2 x^{3}$ 的图像在点 $(1, f(1))$ 处的切线方程为", "options": "['$y=-2 x-1$', '$y=-2 x+1$', '$y=2 x-3$', '$y=2 x+1$']", "type": 6}
-{"stem": "设函数 $f(x)=\\cos \\left(\\omega x+\\frac{\\pi}{6}\\right)$ 在 $[-\\pi, \\pi]$ 的图像大致如下图，则 $f(x)$ 的最小正周期为$\\FigureID{3bf392d3-8af1-11eb-a886-b46bfc50aa29}$$\\FigureID{59b9621f-8af1-11eb-af0a-b46bfc50aa29}$$\\FigureID{08909400-8b7c-11eb-93b1-b46bfc50aa29}$", "options": "['$\\\\frac{10 \\\\pi}{9}$', '$\\\\frac{7 \\\\pi}{6}$', '$\\\\frac{4 \\\\pi}{3}$', '$\\\\frac{3 \\\\pi}{2}$']", "type": 6}
-{"stem": "二项式 $\\left(x+\\frac{y^{2}}{x}\\right)(x+y)^{5}$ 的展开式中 $x^{3} y^{3}$ 的系数为", "options": "['5', '10', '15', '20']", "type": 6}
-{"stem": "已知 $\\alpha \\in(0, \\pi)$，且 $3 \\cos \\alpha-8 \\cos \\alpha=5,$ 则 $\\sin \\alpha=$", "options": "['$\\\\frac{\\\\sqrt{5}}{3}$', '$\\\\frac{2}{3}$', '$\\\\frac{1}{3}$', '$\\\\frac{\\\\sqrt{5}}{9}$']", "type": 6}
-{"stem": "已知 $A，B，C$ 为球 $O$ 的球面上的三个点， $\\quad \\odot O_{1}$ 为 $\\Delta A B C$ 的外接圆，若 $\\odot O_{1}$ 的面积为 $4 \\pi$，$A B=B C=A C=OO_{1}\\quad$，则球 $O$ 的表面积为$\\FigureID{3bf3bcb6-8af1-11eb-9096-b46bfc50aa29}$$\\FigureID{59b98918-8af1-11eb-9ea7-b46bfc50aa29}$$\\FigureID{08909401-8b7c-11eb-97ba-b46bfc50aa29}$", "options": "['$64 \\\\pi$', '$48 \\\\pi$', '$36 \\\\pi$', '$32 \\\\pi$']", "type": 6}
-{"stem": "已知 $\\odot M : x^{2}+y^{2}-2 x-2 y-2=0,$ 直线 $l: 2 x+y+2=0, P$ 为 $l$ 上的动点，过点 $P$ 作 $\\odot M$ 的切线 $P A$，$P B,$ 且切点为 $A, B,$ 当| $P M|\\cdot| A B \\mid$ 最小时，直线 $A B$ 的方程为", "options": "['$2 x-y-1=0$', '$2 x+y-1=0$', '$2 x-y+1=0$', '$2 x+y+1=0$']", "type": 6}
-{"stem": "指数函数 对数函数 若 $2^{a}+\\log _{2} a=4^{b}+2 \\log _{4} b,$ 则", "options": "['$a>2 b$', '$a<2 b$', '$a>b^{2}$', '$a<b^{2}$']", "type": 6}
-{"stem": "若 $x$ ， $y$ 满足约束条件 $\\left\\{\\begin{array}{c}2 x+y-2 \\leq 0 \\ x-y-1 \\geqslant 0 \\ y+1 \\geqslant 0\\end{array}\\right.$ ，则 $z=x+7 y$ 的最大值为", "options": "[]", "type": 2}
-{"stem": "设 $a, b$ 为单位向量，且 $|a+b|=1,$ 则 $|a-b|=$\n", "options": "[]", "type": 2}
-{"stem": "已知 $F$ 为双曲线 $C: \\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$ 的右焦点， $A$ 为 $C$ 的右顶点， $B$ 为C 上的点且 $B F$ 垂直于 $x$ \n轴. 若 $A B$ 的斜率为3，则C 的离心率为", "options": "[]", "type": 2}
-{"stem": "如图，在三棱锥 $P-A B C$ 的平面展开图中， $A C=1, \\quad A B=A D=\\sqrt{3}, \\quad A B \\perp A C, \\quad A B \\perp A D$ 40$\\cos \\angle C A E=30,$ 別 $\\cos \\angle F C B=$", "options": "[]", "type": 2}
-{"stem": "设 $\\left\\{a_{n}\\right\\}$ 是公比不为 1 的等比数列， $a_{1}$ 为 $a_{2}, \\quad a_{3}$ 的等差中项.求 $\\left\\{a_{n}\\right\\}$ 的公比；若 $a_{1}=1,$ 求数列 $\\left\\{n a_{n}\\right\\}$ 的前 $n$ 项和.", "options": "[]", "type": 4}
-{"stem": "如图，$D$为圆锥的顶点，$O$是圆锥底面的圆心，$AE$ 为底面直径，AE = AD。 $\\triangle ABC$ 是底面的内接正三角形， $P$ 为$DO$上一点， $P O=\\frac{\\sqrt{6}}{6} D O$证明: $\\quad P A \\perp$ 平面 $P B C$；求二面角 $B-P C-E$ 的余弦值.$\\FigureID{3bf3bcb7-8af1-11eb-91e3-b46bfc50aa29}$$\\FigureID{59b98919-8af1-11eb-9476-b46bfc50aa29}$$\\FigureID{08909402-8b7c-11eb-984b-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "甲、乙、两三位同学进行羽毛球比赛，颈定赛制如下:\n累计负两场者被淘汰; 比赛前抽签决定首次比赛的两个人，另一人轮空; 每场比赛的胜者与轮空者\n进行下一场比赛，负者下一场轮空，直至有一人淘汰; 当一人被淘汰后，剩余的两人继实比赛，直至其中一人被淘汰，另一人最终获胜，比赛结束。\n经抽签，甲、乙首先比赛，两轮空. 设每场比赛双方获胜的概率都为 $\\frac{1}{2}$求甲连胜四场的概率；求需要进行第五场比赛的概率;求丙最终获胜的概率.", "options": "[]", "type": 4}
-{"stem": "已知 $A, B$ 分别为椭圆 $E: \\frac{x^{2}}{a^{2}}+y^{2}=1(a>1)$ 的左、右顶点， $G$ 为$E$的上顶点 $, \\overrightarrow{A G} \\cdot \\overrightarrow{G B}=8, P$ 为直线 $x=6$ 上的动点， $P A$ 与$E$的另一交点为C， $P B$ 与$E$的另一交点为 $D$求E的方程；证明：直线CD过定点.", "options": "[]", "type": 4}
-{"stem": "已知函数 $f(x)=\\mathrm{e}^{x}+a x^{2}-x$.（1）当 $a=1$ 时，讨论 $f(x)$ 的单调性;(2) 当 $x \\geq 0$ 时， $f(x) \\geq \\frac{1}{2} x^{3}+1,$ 求 $a$ 的取值范围.", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy 中，曲线 $C_{1}$ 的参数方程为$\\left\\{\\begin{array}{l}x=\\cos ^{k} t \\ y=\\sin ^{k} t\\end{array}\\right.$ ($t$为参数)，以坐标原点为极点，$x$ 轴正半轴为极轴建立极坐标系，曲线 $C_{2}$ 的极坐标方程为 $4 \\rho \\cos \\theta-16 \\rho \\sin \\theta+3=0$当 $k=1$ 时， $C_{1}$ 是什么曲线?当 $k=4$ 时，齐 $C_{1}$ 与 $C_{2}$ 的公共点的直角坐标.", "options": "[]", "type": 4}
-{"stem": "已知函数 $f(x)=|3 x+1|-2|x-1|$画出 $y=f(x)$ 的图像；求不等式 $f(x)>f(x+1)$ 的解集.", "options": "[]", "type": 4}
-{"stem": "已知集合$U=\\{-2,-1,0,1,2,3\\}$，$A=\\{-1,0,1\\}$，$B=\\{1,2\\}$，则$C_{U}(A \\cup B)=$", "options": "['$\\\\{-2,3\\\\}$', '$\\\\{-2,2,3\\\\}$', '$\\\\{-2,-1,0,3\\\\}$', '$\\\\{-2,-1,0,2,3\\\\}$']", "type": 6}
-{"stem": "若$\\alpha$为第四象限角，则", "options": "['$\\\\cos 2 \\\\alpha>0$', '$\\\\cos 2 \\\\alpha<0$', '$\\\\sin 2 \\\\alpha>0$', '$\\\\sin 2 \\\\alpha<0$']", "type": 6}
-{"stem": "在新冠肺炎疫情防控期间，某超市开通网上销售业务，每天能完成1200份订单的配货，由于订单量大幅度增加，导致订单积压，为解决困难，许多志愿者踊跃报名参加配货工.已知该超市某日积压500份订单未配货，预计第二天新订单是1600份的概率为0.05，志愿者每人每天能完成50份订单的配货，为使第二天积压订单及当日订单的配货概率不小于0.95，则至少需要志愿者", "options": "['10名', '18名', '24名', '32名']", "type": 6}
-{"stem": "北京天坛的圆丘坛为古代祭天的场所，分上、中、下三层，上层中心有一块圆形石板 （称为天心石），环绕天心石砌9块扇面形石板构成第一环，向外每环依次增加 9 块，下一层的第一环比上一层的最后一环多 9 块, 向外每环依次也增加 9 块，已知每层环数相同，且下层比中层多 729 块，则三层共有扇形面形石板 (不含天心石）$\\FigureID{3bf3bcb8-8af1-11eb-99db-b46bfc50aa29}$$\\FigureID{59b9b018-8af1-11eb-a3c9-b46bfc50aa29}$$\\FigureID{08909403-8b7c-11eb-9a3a-b46bfc50aa29}$", "options": "['3699块', '3474块', '3402块', '3339块']", "type": 6}
-{"stem": "若过点$(2,1)$的圆与两坐标轴都相切，则圆心到直线$2x- y-3=0$的距离为", "options": "['$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{2\\\\sqrt{5}}{5}$', '$\\\\frac{3\\\\sqrt{5}}{5}$', '$\\\\frac{4\\\\sqrt{5}}{5}$']", "type": 6}
-{"stem": "数列 $\\left\\{a_{n}\\right\\}$中，$a_{1}=2$，$a_{m+n}=a_{m} a_{n}$，若 $a_{k+1}+a_{k+2}+\\cdots+a_{k+10}=2^{15}-2^{5}$，则 $k=$", "options": "['2', '3', '4', '5']", "type": 6}
-{"stem": "右边图是一个多面体的三视图，这个多面体某条棱的一个端点在正视图中对应的点为 $M$，在俯视图中对应的点为$N$，则该端点在侧视图中对应的点为$\\FigureID{3bf3e56c-8af1-11eb-b989-b46bfc50aa29}$$\\FigureID{59b9b019-8af1-11eb-b7e4-b46bfc50aa29}$$\\FigureID{08909404-8b7c-11eb-9fdb-b46bfc50aa29}$", "options": "['E', 'F', 'G', 'H']", "type": 6}
-{"stem": "设$O$为坐标原点，直线$x=a$与双曲线C:$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$的两条渐近线分别交于$D$，$E$两点，若$\\triangle O D E$的面积为8，则C的焦距的最小值为", "options": "['4', '8', '16', '32']", "type": 6}
-{"stem": "设函数$f(x)=\\ln |2 x+1|-\\ln |2 x-1|$，则$f(x)$", "options": "['是偶函数，且在$\\\\left(\\\\frac{1}{2},+\\\\infty\\\\right)$单调递增', '是奇函数，且在$\\\\left(-\\\\frac{1}{2}, \\\\frac{1}{2}\\\\right)$单调递减', '是偶函数，且在$\\\\left(-\\\\infty,-\\\\frac{1}{2}\\\\right)$单调递增', '是奇函数，且在$\\\\left(-\\\\infty,-\\\\frac{1}{2}\\\\right)$单调递减']", "type": 6}
-{"stem": "已知 $\\triangle A B C$ 是面积为 $\\frac{9 \\sqrt{3}}{4}$的等边三角形，且其顶点都在球 $O$ 的球面上，若球 $O$ 的表面积为$16 \\pi,$ 则$O$到平面$A B C$ 的距离为", "options": "['$\\\\sqrt{3}$', '$\\\\frac{3}{2}$', '$1$', '$\\\\frac{\\\\sqrt{3}}{2}$']", "type": 6}
-{"stem": "导数 对数函数 若$2^{x}-2^{y}<3^{-x}-3^{-y}$，则", "options": "['$\\\\ln (y-x+1)>0$', '$\\\\ln (y-x+1)<0$', '$\\\\ln |x-y|>0$', '$\\\\ln |x-y|<0$']", "type": 6}
-{"stem": "0-1周期序列在通信技术中有着重要应用，序列$a_{1} a_{2} \\cdots a_{n} \\cdots$ 满足 $a_{1} \\in\\{0,1\\}(i=1,2, \\cdots)$，且存在正整数$m$，使得 $a_{i+m}=a_{i}(i=1,2, \\cdots)$ 成立，则称其为0 -1周期数列，并称满足$a_{i+m}=a_{i}(i=1,2, \\cdots)$的最小正整数$m$为这个序列的周期.对于周期为$m$的0-1序列$a_{1} a_{2} \\cdots a_{n} \\cdots, C(k)=\\frac{1}{m} \\sum_{i=1}^{m} a_{i} a_{i+k}(k=1,2, \\cdots, m-1)$是描述其性质的重要指标.下列周期为5的0-1序列中，满足$C(k) \\leq \\frac{1}{5}(k=1,2,3,4)$的序列是", "options": "['$11010 \\\\ldots$', '$11011 \\\\ldots$', '$10001 \\\\ldots$', '$11001 \\\\ldots$']", "type": 6}
-{"stem": "已知单位向量$\\mathbf{a}$，$\\mathbf{b}$的夹角为$45^{\\circ}$，$k\\mathbf{a}-\\mathbf{b}$与$\\mathbf{a}$垂直，则$k=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "排列 组合 4名同学到3个小区参加垃圾分类宣传活动，每名同学只去1个小区，每个小区至少安排1名学生，则不同的安排方法有_______种", "options": "[]", "type": 2}
-{"stem": "设复数$z_{1}$，$z_{2}$满足$\\left|z_{1}\\right|=\\left|z_{2}\\right|=2$，$z_{1}+z_{2}=\\sqrt{3}+\\mathbf{i}$，则 $\\left|z_{1}-z_{2}\\right|=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "设有下列四个命题:\n$p_{1}$：两两相交且不过同一点的三条直线必在同一平面内.\n$p_{2}$：过空间中任意三点有且仅有一个平面.\n$p_{3}$：若空间两条直线不相交，则这两条直线平行.\n$p_{4}$：若直线 $l \\subset$ 平面 $\\alpha$，直线$m \\perp$平面$\\alpha$，则$m \\perp l$.\n则下列命题中所有真命题的序号是$\\SIFBlank$\n①$p_{1} \\wedge p_{4}$ ②$p_{1} \\wedge p_{2}$ ③$\\neg p_{2} \\vee p_{3}$ ④$\\neg p_{3} \\vee \\neg p_{4}$", "options": "[]", "type": 2}
-{"stem": "$\\triangle A B C$中，$\\sin ^{2} A-\\sin ^{2} B-\\sin ^{2} C=\\sin B \\sin C$.求$A$；若$BC=3$，求$\\triangle A B C$周长的最大值.", "options": "[]", "type": 4}
-{"stem": "某沙漠地区经过治理，生态系统得到很大改善，野生动物数量有所增加，为调查该地区某种野生动物的数量，将其分成面积相近的 200 个地块，从这些地块中用简单随机抽样的方法抽取 20 个作为样区，调查得到样本数据$\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20)$，其中$x_{i}$ 和 $y_{i}$分别表示第$i$个样区的植物覆盖面积（单位: 公顷）和这种野生动物的数量，并计算得$\\sum_{i=1}^{20} x_{i}=60$，$\\sum_{i=1}^{20} y_{i}=1200$，$\\sum_{i=1}^{20}\\left(x_{i}-\\bar{x}\\right)^{2}=80$，$\\sum_{i=1}^{20}\\left(y_{i}-\\bar{y}\\right)^{2}=9000$，$\\sum_{i=1}^{20}\\left(x_{i}-\\bar{x}\\right)\\left(y_{i}-\\bar{y}\\right)=800$.求该地区这种野生动物数量的估计值（这种野生动物数量的估计值等于样区这种野生动物数量的平均数乘以地块数);求样本$\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20)$的相关系数（精确到0.01);根据现有统计资料，各地块间植物短盖面积差异很大，为提高样本的代表性以获得该地区这种野生动物数量更准确的估计，请给出一种你认为更合理的抽样方法，并说明理由。\n附：相关系数：$r=\\frac{\\sum_{i=1}^{n}\\left(x_{i}-\\bar{x}\\right)\\left(y_{i}-\\bar{y}\\right)}{\\sqrt{\\sum_{i=1}^{n}\\left(x_{i}-\\bar{x}\\right)^{2} \\sum_{i=1}^{n}\\left(y_{i}-\\bar{y}\\right)^{2}}}$，$ \\sqrt{2} \\approx 1.414$", "options": "[]", "type": 4}
-{"stem": "已知椭圆$C_{1}$：$\\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1(a>b>0)$的右焦点$F$抛物线$C_{2}$的焦点重合.$C_{1}$ 的中心与$C_{2}$的顶点重合，过$F$且与$x$轴垂直的直线交$C_{1}$于$A$，$B$两点，交$C_{2}$于$C$，$D$两点，且$|C D|=\\frac{4}{3}|A B|$.求$C_{1}$的离心率;设$M$是$C_{1}$与$C_{2}$的公共点. 若 $|M F|=5,$ 求$C_{1}$与$C_{2}$的标准方程.", "options": "[]", "type": 4}
-{"stem": "如图已知三棱柱 $A B C-A_{1} B_{1} C_{1}$ 的底面是正三角形，侧面$B B_{1} C_{1} C$ 是矩形，$M$，$N$分别为$B C$，$B_{1} C_{1}$的中点，$P$为$A M$ 上一点，过 $B_{1} C_{1}$和P的平面交$A B$于$E$，交$A C$于$F$.证明：$A A_{1} \\parallel M N$，且平面$A_{1} A M N \\perp$平面$E B_{1} C_{1} F$；设$O$为$A_{1} B_{1} C_{1}$ 的中心，若$A O\\parallel$面$E B_{1} C_{1} F$，且$A O=A B$，求直线$B_{1} E$与平面$A_{1} AMN$所成角的正弦值.$\\FigureID{3bf40b00-8af1-11eb-b89b-b46bfc50aa29}$$\\FigureID{59b9c168-8af1-11eb-b239-b46bfc50aa29}$$\\FigureID{08909405-8b7c-11eb-a7ec-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\sin ^{2} x \\sin 2 x$.讨论$f(x)$在$(0, \\pi)$上的单调性；证明：$|f(x)| \\leq \\frac{3 \\sqrt{3}}{8}$；证明：$\\sin ^{2} x \\sin ^{2} 2 x \\sin ^{2} 4 x \\ldots \\sin ^{2} 2^{n} x \\leq \\frac{3^{n}}{4^{n}}$.", "options": "[]", "type": 4}
-{"stem": "已知$C_{1}$，$C_{2}$的参数方程为$C_{1}$：$\\left\\{\\begin{array}{l}x=4 \\cos ^{2} \\theta \\ y=4 \\sin ^{2} \\theta\\end{array}\\right.$，($\\theta$ 为参数)，$C_{2}$：$\\left\\{\\begin{array}{l}x=t+\\frac{1}{t} \\ y=t-\\frac{1}{t}\\end{array}\\right.$，($t$ 为参数).将$C_{1}$，$C_{2}$的参数方程化为普通方程；以坐标原点为极点，$x$轴正半轴为极轴建立极坐标系，设 $C_{1}$，$C_{2}$ 的交点为 $P$，求圆心在极轴上，且经过极点和$P$的圆的极坐标方程", "options": "[]", "type": 4}
-{"stem": "$f(x)=\\left|x-a^{2}\\right|+|x+2 a-1|$当$a=2$时，求不等式$f(x) \\geq 4$ 的解集；$f(x) \\geq 4,$ 求$a$的取值范固.", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\left\\{(x, y) \\mid x, y \\in N^{*}, y \\geqslant x\\right\\}$，$B=\\{(x, y) \\mid x+y=8\\}$，则$A \\cap B$中的元素的个数为", "options": "['2', '3', '4', '6']", "type": 6}
-{"stem": "复数$\\frac{1}{1-3 i}$的虚部是", "options": "['$-\\\\frac{3}{10}$', '$-\\\\frac{1}{10}$', '$\\\\frac{1}{10}$', '$\\\\frac{3}{10}$']", "type": 6}
-{"stem": "在一组样本数据中，1，2，3，4出现的概率分别为$p_{1}, p_{2}, p_{3}, p_{4}$，且$\\sum_{i=1}^{4} p_{i}=1$，则下面四种情形中，对应样本的标准差最大的一组是", "options": "['$p_{1}=p_{4}=0.1, \\\\quad p_{2}=p_{3}=0.4$', '$p_{1}=p_{4}=0.4, \\\\quad p_{2}=p_{3}=0.1$', '$p_{1}=p_{4}=0.2, \\\\quad p_{2}=p_{3}=0.3$', '$p_{1}=p_{4}=0.3, \\\\quad p_{2}=p_{3}=0.1$']", "type": 6}
-{"stem": "指数函数 对数函数 Logistic模型是常用数学模型之一，可应用于流行病学领域. 有学者根据公布数据建立了某地区新冠肺炎累计确诊病例数$I(t)$（t的单位：天）的Logistic模型：$I(t)=\\frac{K}{1+e^{-3x(t-5)}}$，其中K为最大确诊病例数，当$I\\left(t^{*}\\right)=0.95 K$时，标志着已初步遏制疫情，则$t^{*}$约为$(\\ln 19 \\approx 3)$", "options": "{'6': '9'}", "type": 6}
-{"stem": "设O为坐标原点，直线x=2与抛物线$C：y^{2}=2 p x(p>0)$交于D, E两点。若$O D \\perp O E$, 则C的焦点坐标为", "options": "['$\\\\left(\\\\frac{1}{4}, 0\\\\right)$', '$\\\\left(\\\\frac{1}{2}, 0\\\\right)$', '$\\\\left(1, 0\\\\right)$', '$\\\\left(2, 0\\\\right)$']", "type": 6}
-{"stem": "已知向量$a, b$满足$|a|=5 , |b|=6 , a \\cdot b=-6$，则$\\cos \\langle a, a+b\\rangle=$", "options": "['$-\\\\frac{31}{35}$', '$-\\\\frac{19}{35}$', '$\\\\frac{17}{35}$', '$\\\\frac{19}{35}$']", "type": 6}
-{"stem": "在$\\triangle A B C$中, $\\cos C=\\frac{2}{3},  A C=4, B C=3$\n, 则$ \\cos B=$", "options": "['$\\\\frac{1}{9}$', '$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$']", "type": 6}
-{"stem": "右图为某几何体的三视图，该几何体的表面积是$\\FigureID{3bf40b01-8af1-11eb-a705-b46bfc50aa29}$$\\FigureID{59b9e88c-8af1-11eb-983c-b46bfc50aa29}$$\\FigureID{08909406-8b7c-11eb-8b89-b46bfc50aa29}$", "options": "['$6+4 \\\\sqrt{2}$', '$4+4 \\\\sqrt{2}$', '$6+2 \\\\sqrt{3}$', '$4+2 \\\\sqrt{3}$']", "type": 6}
-{"stem": "已知$2 \\tan \\theta-\\tan \\left(\\theta+\\frac{\\pi}{4}\\right)=7$，则$\\tan \\theta=$", "options": "['-2', '-1', '1', '2']", "type": 6}
-{"stem": "若直线$l$与曲线$y=\\sqrt{x}$和圆$x^{2}+y^{2}=\\frac{1}{5}$都相切，则$l$的方程为", "options": "['$y=2 x+1$', '$y=2 x+\\\\frac{1}{2}$', '$y=\\\\frac{1}{2} x+1$', '$y=\\\\frac{1}{2} x+\\\\frac{1}{2}$']", "type": 6}
-{"stem": "设双曲线$C: \\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$的左、右焦点分别为$F_{1}, F_{2}$，离心率为$\\sqrt{5}$. P是C上一点，且$F_{1} P \\perp F_{2} P$. 若$\\triangle P F_{1} F_{2}$的面积为4，则$a=$", "options": "['1', '2', '4', '8']", "type": 6}
-{"stem": "对数函数 已知$5^{5}<8^{4}, 13^{4}<8^{5}$，设$a=\\log _{3} 3, \\quad b=\\log _{3} 5, \\quad c=\\log _{13} 8$，则", "options": "['$a<b<c$', '$b<a<c$', '$b<c<a$', '$c<a<b$']", "type": 6}
-{"stem": "若$x, y$满足约束关系$\\left\\{\\begin{array}{l}x+y \\geq 0 \\ 2 x-y \\geq 0 \\ x \\leq 1\\end{array}\\right.$，则$z=3 x+2 y$的最大值为$\\SIFBlank$.", "options": "[]", "type": 2}
-{"stem": "$二项式 \\left(x^{2}+\\frac{2}{x}\\right)^{6}$的展开式中常数项是$\\SIFBlank$（用数字作答）", "options": "[]", "type": 2}
-{"stem": "已知圆锥的底面半径为1，母线长为3，则该圆锥内半径最大的球的体积为_______", "options": "[]", "type": 2}
-{"stem": "关于函数$f(x)=\\sin x+\\frac{1}{\\sin x}$有如下四个命题：\n①$f(x)$的图像关于$y$轴对称.\n②$f(x)$的图像关于原点对称.\n③$f(x)$的图像关于直线$x=\\frac{\\pi}{2}$对称.\n④$f(x)$的最小值为2.\n其中所有真命题的序号是_______.", "options": "[]", "type": 2}
-{"stem": "（必考题）设数列$\\left\\{a_{n}\\right\\}$满足$a_{1}=3, a_{n+1}=3 a_{n}-4 n$. 计算$a_{1}, a_{2}$，猜想$\\left\\{a_{n}\\right\\}$的通项公式并加以证明；求数列$\\left\\{2^{n} a_{n}\\right\\}$的前n项和$S_{n}$.", "options": "[]", "type": 4}
-{"stem": "某学生兴趣小组随机调查了某市100天中每天的空气质量等级和当天到某公园锻炼的人次，整理数据得到下表（单位：天）：分别估计该市一天的空气质量等级为1，2，3，4的概率；求一天中到该公园锻炼的平均人次的估计值（同一组中的数据用该组区间的重点值为代表）；若某天的空气质量等级为1或2，则称这天“空气质量好”；若某天的空气质量等级为3或4，则称这天“空气质量不好”。根据所给数据，完成下面的2x2列联表，并根据列联表，判断是否有95%的把握认为一天中到该公园锻炼的人次与该市当天的空气质量有关？\n附：$K^{2}=\\frac{n(a d-b c)^{2}}{(a+b)(c+d)(a+c)(b+d)}, \\quad \\frac{P\\left(K^{2} \\geqslant k\\right)}{k} \\mid \\begin{array}{ccc}0.050 & 0.010 & 0.001 \\ 3.841 & 6.635 & 10.828\\end{array}$", "options": "[]", "type": 4}
-{"stem": "如图，在长方体$A B C D-A_{1} B, C_{1} D$中，点E,F分别在棱$D D_{1}, \\quad B B_{1}$上，且$2 D E=E D_{1}$，$B F=2 F B$证明：点$C_{1}$在平面$A E F$内若$A B=2, \\quad A D=1, \\quad A A_{1}=3$，求二面角$A-E F-A_{1}$的正弦值。$\\FigureID{3bf431e4-8af1-11eb-b51c-b46bfc50aa29}$$\\FigureID{59b9e88d-8af1-11eb-9a6c-b46bfc50aa29}$$\\FigureID{08909407-8b7c-11eb-a6b1-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知椭圆$C: \\frac{x^{2}}{25}+\\frac{y^{2}}{m^{2}}=1(0<m<5)$的离心率为$\\frac{\\sqrt{15}}{4}$，A,B分别在C的左、右顶点.求C的方程；若点P在C上，点Q在直线$x=6$上，且$|B P|=|B Q \\mid, \\quad B P \\perp B Q$，求$\\triangle A P Q$的面积.", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=x^{3}+b x+c, x \\in R$，曲线$f(x)$在点$\\left(\\frac{1}{2}, f\\left(\\frac{1}{2}\\right)\\right)$处的切线与y轴垂直。求b;若$f(x)$有一个绝对值不大于1的零点，证明：$f(x)$所有零点的绝对之后都不大于1.", "options": "[]", "type": 4}
-{"stem": "[选修4——4：坐标系与参数方程]在直角坐标系$x O y$中，曲线C的参数方程为$\\left\\{\\begin{array}{l}x=2-t-t^{2} \\ y=2-3 t+t^{2}\\end{array},(t \\text { 为参数且 } t \\neq 1\\right.$），C与坐标轴交于A,B两点.求|AB|;以坐标原点为极点，x轴正半轴为极轴建立极坐标系，求直线AB的极坐标方程.", "options": "[]", "type": 4}
-{"stem": "[选修4——5：不等式选讲]设$a, b, c \\in R, a+b+c=0, a b c=1$.证明：ab+bc+ca<0;用max{a,b,c}表示a,b,c的最大值，证明$\\max \\{a, b, c\\} \\geq \\sqrt[3]{4}$.", "options": "[]", "type": 4}
-{"stem": "已知集合A={x|x=3n+2，n∈N}，B={6，8，10，12，14}，则集合A∩B中元素的个数为（　　）", "options": "['5', '4', '3', '2']", "type": 6}
-{"stem": "已知点A（0，1），B（3，2），向量$\\overrightarrow{\\mathrm{AC}}=(-4,-3)$，则向量$\\overrightarrow{\\mathrm{BC}}=(\\quad)$", "options": "['（﹣7，﹣4）', '（7，4）', '（﹣1，4）', '（1，4）']", "type": 6}
-{"stem": "已知复数z满足$(z-1) \\quad i=1+i$，则z=（　　）", "options": "['﹣2﹣i', '﹣2+i', '2﹣i', '2+i\\t']", "type": 6}
-{"stem": "如果3个正整数可作为一个直角三角形三条边的边长，则称这3个数为一组勾股数．从1，2，3，4，5中任取3个不同的数，则这3个数构成一组勾股数的概率为（　　）", "options": "['$\\\\frac{3}{10}$', '$\\\\frac{1}{5}$', '$\\\\frac{1}{10}$', '$\\\\frac{1}{20}$']", "type": 6}
-{"stem": "已知椭圆E的中心在坐标原点，离心率为$\\frac{1}{2}$，E的右焦点与抛物线C：$y^{2}=8 x$的焦点重合，A，B是C的准线与E的两个交点，则$ |A B |=(\\quad)$", "options": "['3', '6', '9', '12']", "type": 6}
-{"stem": "《九章算术》是我国古代内容极为丰富的数学名著，书中有如下问题：”今有委米依垣内角，下周八尺，高五尺．问：积及为米几何？“其意思为：”在屋内墙角处堆放米（如图，米堆为一个圆锥的四分之一），米堆底部的弧长为8尺，米堆的高为5尺，问米堆的体积和堆放的米各为多少？“已知1斛米的体积约为1.62立方尺，圆周率约为3，估算出堆放的米约有（　　）$\\FigureID{3bf458fa-8af1-11eb-b5f5-b46bfc50aa29}$$\\FigureID{59ba0f8c-8af1-11eb-890e-b46bfc50aa29}$$\\FigureID{08909408-8b7c-11eb-b260-b46bfc50aa29}$", "options": "['14斛', '22斛', '36斛', '66斛']", "type": 6}
-{"stem": "已知$\\left\\{a_{n}\\right\\}$是公差为1的等差数列，$\\mathrm{S}_{n}$为$\\left\\{a_{n}\\right\\}$的前n项和，若$\\mathrm{S}_{8}=4 \\mathrm{S}_{4}$,则$a_{10}=(\\quad)$", "options": "['$\\\\frac{17}{2}$', '$\\\\frac{19}{2}$', '10', '12']", "type": 6}
-{"stem": "函数$f(x)=\\cos (\\omega x+\\phi)$的部分图象如图所示，则$f(x)$的单调递减区间为（　　）$\\FigureID{3bf458fb-8af1-11eb-97c1-b46bfc50aa29}$$\\FigureID{59ba3f48-8af1-11eb-ade2-b46bfc50aa29}$$\\FigureID{08909409-8b7c-11eb-8d25-b46bfc50aa29}$", "options": "['$\\\\left(\\\\mathrm{k} \\\\pi-\\\\frac{1}{4}, \\\\mathrm{k} \\\\pi+\\\\frac{3}{4}\\\\right), \\\\mathrm{k} \\\\in \\\\mathrm{z}$', '$\\\\left(2 \\\\mathrm{k} \\\\pi-\\\\frac{1}{4}, 2 \\\\mathrm{k} \\\\pi+\\\\frac{3}{4}\\\\right), \\\\mathrm{k} \\\\in \\\\mathrm{z}$', '$\\\\left(k-\\\\frac{1}{4}, k+\\\\frac{3}{4}\\\\right), k \\\\in z$', '$\\\\left(2 \\\\mathrm{k}-\\\\frac{1}{4}, 2 \\\\mathrm{k}+\\\\frac{3}{4}\\\\right), \\\\quad \\\\mathrm{k} \\\\in \\\\mathrm{z}$']", "type": 6}
-{"stem": "执行如图所示的程序框图，如果输入的t=0.01，则输出的n=（　　）$\\FigureID{3bf48022-8af1-11eb-afb5-b46bfc50aa29}$$\\FigureID{59ba3f49-8af1-11eb-91dc-b46bfc50aa29}$$\\FigureID{0890940a-8b7c-11eb-837a-b46bfc50aa29}$", "options": "['5', '6', '7', '8']", "type": 6}
-{"stem": "已知函数$f(x)=\\left\\{\\begin{array}{l}2^{x-1}-2, x \\leqslant 1 \\ -\\log _{2}(x+1), x>1\\end{array}\\right.$,且$f(a)=-3$，则$f(6-a)=(\\quad)$", "options": "['$-\\\\frac{7}{4}$', '$-\\\\frac{5}{4}$', '$-\\\\frac{3}{4}$', '$-\\\\frac{1}{4}$']", "type": 6}
-{"stem": "圆柱被一个平面截去一部分后与半球（半径为r）组成一个几何体，该几何体三视图中的正视图和俯视图如图所示．若该几何体的表面积为16+20π，则r=（　　）$\\FigureID{3bf48023-8af1-11eb-a4ca-b46bfc50aa29}$$\\FigureID{59ba6668-8af1-11eb-92c5-b46bfc50aa29}$$\\FigureID{0890940b-8b7c-11eb-bbe6-b46bfc50aa29}$", "options": "['1', '2', '4', '8']", "type": 6}
-{"stem": "设函数$y=f(x)$的图象与$y=2^{x^{+} a}$的图象关于$y=-x$对称，且$f(-2)+f(-4)=1$，则a=（　　）", "options": "['-1', '1', '2', '4']", "type": 6}
-{"stem": "在数列$\\left\\{a_{n}\\right\\}$中，$a_{1}=2, \\quad a_{n+1}=2 a_{n}$,$S_{n}$为$\\left\\{a_{n}\\right\\}$的前n项和，若$S_{n}=126$，则$n=$_______", "options": "[]", "type": 2}
-{"stem": "已知函数$f(x)=a x^{3}+x+1$的图象在点（1，f（1））处的切线过点（2，7），则a=_______", "options": "[]", "type": 2}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x+y-2 \\leqslant 0 \\ x-2 y+1 \\leq 0 \\ 2 x-y+2 \\geqslant 0\\end{array}\\right.$，则z=3x+y的最大值为_______", "options": "[]", "type": 2}
-{"stem": "已知F是双曲线$c: x^{2}-\\frac{y^{2}}{8}=1$的右焦点，P是C的左支上一点，$A(0,6 \\sqrt{6})$．当$\\triangle \\mathrm{APF}$周长最小时，该三角形的面积为_______", "options": "[]", "type": 2}
-{"stem": "已知a，b，c分别是$\\triangle \\mathrm{ABC}$内角A，B，C的对边，$\\sin ^{2} \\mathrm{B}=2 \\sin \\mathrm{A} \\sin \\mathrm{C}$. 若a=b，求cosB；设$\\mathrm{B}=90^{\\circ}$，且$a=\\sqrt{2}$，求$\\triangle \\mathrm{ABC}$的面积．", "options": "[]", "type": 4}
-{"stem": "如图，四边形ABCD为菱形，G为AC与BD的交点，BE⊥平面ABCD．证明：平面AEC⊥平面BED；若∠ABC=120°，AE⊥EC，三棱锥E﹣ACD的体积为$\\frac{\\sqrt{6}}{3}$求该三棱锥的侧面积．$\\FigureID{3bf48024-8af1-11eb-9a73-b46bfc50aa29}$$\\FigureID{59ba6669-8af1-11eb-a9e7-b46bfc50aa29}$$\\FigureID{0890940c-8b7c-11eb-abcc-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "某公司为确定下一年度投入某种产品的宣传费，需了解年宣传费x（单位：千元）对年销售量y（单位：t）和年利润z（单位：千元）的影响，对近8年的年宣传费xi和年销售量yi（i=1，2，…，8）数据作了初步处理，得到下面的散点图及一些统计量的值．根据散点图判断，$y=a+b x$与$y=c+d \\sqrt{x}$哪一个适宜作为年销售量y关于年宣传费x的回归方程类型？（给出判断即可，不必说明理由）根据（Ⅰ）的判断结果及表中数据，建立y关于x的回归方程；已知这种产品的年利润z与x、y的关系为z=0.2y﹣x．根据（Ⅱ）的结果回答下列问题：\n（i）年宣传费x=49时，年销售量及年利润的预报值是多少？\n（ii）年宣传费x为何值时，年利润的预报值最大？$\\FigureID{3bf4ae78-8af1-11eb-8f95-b46bfc50aa29}$$\\FigureID{59ba8d50-8af1-11eb-a081-b46bfc50aa29}$$\\FigureID{0890940d-8b7c-11eb-bd67-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知过点A（0，1）且斜率为k的直线l与圆C：$(x-2)^{2}+(y-3)^{2}=1$交于点M、N两点．求k的取值范围；若$\\overrightarrow{\\mathrm{OM}} \\cdot \\overrightarrow{\\mathrm{ON}}=12$，其中O为坐标原点，求|MN|．", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=e^{2 x}-a \\ln x$.讨论f（x）的导函数f′（x）零点的个数；证明：当a＞0时，$f(x) \\geqslant 2 a+a \\ln \\frac{2}{a}$", "options": "[]", "type": 4}
-{"stem": "如图，AB是⊙O的直径，AC是⊙O的切线，BC交⊙O于点E．若D为AC的中点，证明：DE是⊙O的切线；若$\\mathrm{OA}=\\sqrt{3} \\mathrm{CE}$，求∠ACB的大小．$\\FigureID{3bf4ae79-8af1-11eb-b13e-b46bfc50aa29}$$\\FigureID{59ba8d51-8af1-11eb-943d-b46bfc50aa29}$$\\FigureID{0890940e-8b7c-11eb-be0e-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，直线$C_{1}: \\quad x=-2, \\quad$ 圆 $C_{2}:(x-1)^{2}+(y-2)^{2}=1$，以坐标原点为极点，x轴的正半轴为极轴建立极坐标系．求$\\mathrm{C}_{1}, \\mathrm{C}_{2}$的极坐标方程；若直线$\\mathrm{C}_{3}$的极坐标方程为$\\theta=\\frac{\\pi}{4}(\\rho \\in R)$，设$\\mathrm{C}_{2}$与$\\mathrm{C}_{3}$的交点为M，N，求$\\triangle \\mathrm{C}_{2} \\mathrm{MN}$的面积．", "options": "[]", "type": 4}
-{"stem": "已知函数f（x）=|x+1|﹣2|x﹣a|，a＞0．当a=1时，求不等式f（x）＞1的解集；若f（x）的图象与x轴围成的三角形面积大于6，求a的取值范围．", "options": "[]", "type": 4}
-{"stem": "设集合A={1，3，5，7}，B={x|2≤x≤5}，则A∩B=（　　）", "options": "['{1，3}', '{3，5}', '{5，7}', '{1，7}']", "type": 6}
-{"stem": "设$(1+2 i)(a+i)$的实部与虚部相等，其中a为实数，则a等于（　　）", "options": "['﹣3', '﹣2', '2', '3']", "type": 6}
-{"stem": "为美化环境，从红、黄、白、紫4种颜色的花中任选2种花种在一个花坛中，余下的2种花种在另一个花坛中，则红色和紫色的花不在同一花坛的概率是（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$', '$\\\\frac{5}{6}$']", "type": 6}
-{"stem": "$\\triangle \\mathrm{ABC}$的内角A、B、C的对边分别为a、b、c．已知$a=\\sqrt{5}$，$c=2$，$\\cos A=\\frac{2}{3}$，则b=（　　）", "options": "['$\\\\sqrt{2}$', '$\\\\sqrt{3}$', '2', '3']", "type": 6}
-{"stem": "直线l经过椭圆的一个顶点和一个焦点，若椭圆中心到l的距离为其短轴长的$\\frac{1}{4}$ ，则该椭圆的离心率为（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$', '$\\\\frac{3}{4}$']", "type": 6}
-{"stem": "将函数$y=2 \\sin \\left(2 x+\\frac{\\pi}{6}\\right)$）的图象向右平移 $\\frac{1}{4}$个周期后，所得图象对应的函数为（　　）", "options": "['$y=2 \\\\sin \\\\left(2 x+\\\\frac{\\\\pi}{4}\\\\right)$', '$y=2 \\\\sin \\\\left(2 x+\\\\frac{\\\\pi}{3}\\\\right)$', '$y=2 \\\\sin \\\\left(2 x-\\\\frac{\\\\pi}{4}\\\\right)$', '$y=2 \\\\sin \\\\left(2 x-\\\\frac{\\\\pi}{3}\\\\right)$']", "type": 6}
-{"stem": "如图，某几何体的三视图是三个半径相等的圆及每个圆中两条相互垂直的半径．若该几何体的体积是$\\frac{28 \\pi}{3}$ ，则它的表面积是（　　）$\\FigureID{3bf4dd58-8af1-11eb-9b66-b46bfc50aa29}$$\\FigureID{59bab44a-8af1-11eb-89e1-b46bfc50aa29}$$\\FigureID{0891551e-8b7c-11eb-9df8-b46bfc50aa29}$", "options": "['17π', '18π', '20π', '28π']", "type": 6}
-{"stem": "若$a>b>0$，$0<c<1$，则（　　）", "options": "['$\\\\log _{a} c<\\\\log _{b} c$', '$\\\\log _{c} a<\\\\log _{c} b$', '$a^{c}<b^{c}$', '$c^{a}>c^{b}$']", "type": 6}
-{"stem": "函数$y=2 x^{2}-e^{|x|}$在[﹣2，2]的图象大致为（　　）", "options": "['$\\\\LUNAPictureID{3bfd3dee-8af1-11eb-95a3-b46bfc50aa29}$$\\\\LUNAPictureID{59c2a566-8af1-11eb-8d91-b46bfc50aa29}$$\\\\LUNAPictureID{0896e41e-8b7c-11eb-8643-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3def-8af1-11eb-b2dd-b46bfc50aa29}$$\\\\LUNAPictureID{59c2ccb6-8af1-11eb-8544-b46bfc50aa29}$$\\\\LUNAPictureID{0896e41f-8b7c-11eb-b7df-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3df0-8af1-11eb-bf0d-b46bfc50aa29}$$\\\\LUNAPictureID{59c2ccb7-8af1-11eb-8c35-b46bfc50aa29}$$\\\\LUNAPictureID{0896e420-8b7c-11eb-9b31-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3df1-8af1-11eb-a34b-b46bfc50aa29}$$\\\\LUNAPictureID{59c2ccb8-8af1-11eb-82aa-b46bfc50aa29}$$\\\\LUNAPictureID{0896e421-8b7c-11eb-b676-b46bfc50aa29}$']", "type": 6}
-{"stem": "执行下面的程序框图，如果输入的$x=0, \\quad y=1, \\quad n=1$，则输出$x$，$y$的值满足（　　）$\\FigureID{3bf4dd59-8af1-11eb-bc95-b46bfc50aa29}$$\\FigureID{59bab44b-8af1-11eb-b221-b46bfc50aa29}$$\\FigureID{0891551f-8b7c-11eb-beff-b46bfc50aa29}$", "options": "['$y=2 x$', '$y=3 x$', '$y=4 x$', '$y=5 x$']", "type": 6}
-{"stem": "平面$\\alpha$过正方体$\\mathrm{ABCD}-\\mathrm{A}_{1} \\mathrm{B}_{1} \\mathrm{C}_{1} \\mathrm{D}_{1}$的顶点$A$，$\\alpha / /$平面$\\mathrm{CB}_{1} \\mathrm{D}_{1}$，$\\alpha \\cap$平面$A B C D=m$，$\\alpha \\cap$平面$\\mathrm{ABB}_{1} \\mathrm{A}_{1}=\\mathrm{n}$，则$m, n$所成角的正弦值为（　　）", "options": "['$\\\\frac{\\\\sqrt{3}}{2}$', '$\\\\frac{\\\\sqrt{2}}{2}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{1}{3}$']", "type": 6}
-{"stem": "若函数$f(x)=x-\\frac{1}{3} \\sin 2 x+\\operatorname{asin} x$在$(-\\infty,+\\infty)$单调递增，则$a$的取值范围是（　　）", "options": "['[-1,1]', '$\\\\left[-1, \\\\frac{1}{3}\\\\right]$', '$\\\\left[-\\\\frac{1}{3}, \\\\frac{1}{3}\\\\right]$', '$\\\\left[-1,-\\\\frac{1}{3}\\\\right]$']", "type": 6}
-{"stem": "设向量 $\\vec{a}=(x, x+1)$，$\\vec{b}=(1,2)$，且 $\\vec{a} \\perp \\vec{b}$ ，则$x=$ $\\SIFBlank$．", "options": "[]", "type": 2}
-{"stem": "已知 $\\theta$ 是第四象限角，且$\\sin \\left(\\theta+\\frac{\\pi}{4}\\right)=\\frac{3}{5}$ ，则 $\\tan \\left(\\theta-\\frac{\\pi}{4}\\right)=$ $\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "设直线 $y=x+2 a$ 与圆 $C: x^{2}+y^{2}-2 a y-2=0$ 相交于 $A, B$ 两点，若$|A B|=2 \\sqrt{3}$ ，则圆 $C$ 的面积为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "某高科技企业生产产品 $A$ 和产品 $B$ 需要甲、乙两种新型材料．生产一件产品 $A$ 需要甲材料$1.5 \\mathrm{kg}$，乙材料$1 \\mathrm{kg}$，用 $5$ 个工时；生产一件产品 $B$ 需要甲材料$0.5 \\mathrm{kg}$，乙材料 $0.3 \\mathrm{kg}$，用 $3$ 个工时，生产一件产品 $A$ 的利润为 $2100$ 元，生产一件产品 $B$ 的利润为 $900$ 元．该企业现有甲材料 $150 \\mathrm{kg}$，乙材料 $90 \\mathrm{kg}$，则在不超过 $600$ 个工时的条件下，生产产品 $A$ 、产品 $B$ 的利润之和的最大值为______元．", "options": "[]", "type": 2}
-{"stem": "已知$\\left\\{a_{n}\\right\\}$是公差为$3$的等差数列，数列$\\left\\{b_{n}\\right\\}$满足$b_{1}=1, \\quad b_{2}=\\frac{1}{3}$ ,$a_{n} b_{n+1}+b_{n+1}=n b_{n}$．（Ⅰ）求$\\left\\{a_{n}\\right\\}$的通项公式（Ⅱ）求$\\left\\{b_{n}\\right\\}$的前$n$项和．", "options": "[]", "type": 4}
-{"stem": "如图，已知正三棱锥$P-A B C$的侧面是直角三角形，$\\mathrm{PA}=6$，顶点$P$在平面$ABC$内的正投影为点$D$，$D$在平面$PAB$内的正投影为点$E$，连接$PE$并延长交$AB$于点$G$．证明：$G$是$AB$的中点；在图中作出点$E$在平面$PAC$内的正投影$F$（说明作法及理由），并求四面体$PDEF$的体积．", "options": "[]", "type": 4}
-{"stem": "某公司计划购买$1$台机器，该种机器使用三年后即被淘汰．机器有一易损零件，在购进机器时，可以额外购买这种零件作为备件，每个$200$元．在机器使用期间，如果备件不足再购买，则每个$500$元．现需决策在购买机器时应同时购买几个易损零件，为此搜集并整理了$100$台这种机器在三年使用期内更换的易损零件数，得如图柱状图：\n记$x$表示$1$台机器在三年使用期内需更换的易损零件数，$y$表示$1$台机器在购买易损零件上所需的费用（单位：元），$n$表示购机的同时购买的易损零件数．（Ⅰ）若$n=19$，求$y$与$x$的函数解析式；（Ⅱ）若要求“需更换的易损零件数不大于$n$”的频率不小$0.5$，求$n$的最小值；（Ⅲ）假设这$100$台机器在购机的同时每台都购买$19$个易损零件，或每台都购买$20$个易损零件，分别计算这$100$台机器在购买易损零件上所需费用的平均数，以此作为决策依据，购买$1$台机器的同时应购买$19$个还是$20$个易损零件？$\\FigureID{3bf5044c-8af1-11eb-9e87-b46bfc50aa29}$$\\FigureID{59badbb6-8af1-11eb-a422-b46bfc50aa29}$$\\FigureID{08915520-8b7c-11eb-83b3-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，直线 $l : \\quad y=t \\quad(t \\neq 0)$交$y$轴于点$M$，交抛物线 $C: \\quad y^{2}=2 p x(p>0)$于点$P，M$关于点$P$的对称点为$N$，连结$ON$并延长交$C$于点$H$．（Ⅰ）求 $\\frac{|O H|}{|O N|}$；（Ⅱ）除$H$以外，直线$MH$与$C$是否有其它公共点？说明理由．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=(x-2) e^{x}+a(x-1)^{2}$（Ⅰ）讨论$f(x)$的单调性；（Ⅱ）若$f(x)$有两个零点，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "如图，$\\triangle O A B$是等腰三角形，$\\angle \\mathrm{AOB}=120^{\\circ}$．以$O$为圆心， $OA$为半径作圆．证明：直线$AB$与$\\odot O$相切；点$C，D$在$\\odot O$上，且$A，B，C，D$四点共圆，证明：$\\mathrm{AB} / / \\mathrm{CD}$．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，曲线$C_{1}$的参数方程为 （$t$为参数，$a＞0$）．在以坐标原点为极点，$x$轴正半轴为极轴的极坐标系中，曲线$\\mathrm{C}_{2}: \\quad \\rho=4 \\cos \\theta$．（Ⅰ）说明$C_{1}$是哪种曲线，并将$C_{1}$的方程化为极坐标方程；（Ⅱ）直线$C_{3}$的极坐标方程为$\\theta=\\alpha_{0}$，其中$\\alpha_{0}$满足$\\tan \\alpha_{0}=2$，若曲线$C_{1}$与$C_{2}$的公共点都在$C_{3}$上，求$a$．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=|x+1|-|2 x-3|$．（Ⅰ）在图中画出$y=f(x)$的图象；（Ⅱ）求不等式$|f(x)|>1$的解集．", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{x | x<2\\}$，$B=\\{x | 3-2 x>0\\}$，则（　　）", "options": "['$A \\\\cap B=\\\\left\\\\{x | x<\\\\frac{3}{2}\\\\right\\\\}$', '$A \\\\cap B=\\\\varnothing$', '$A \\\\cup B=\\\\left\\\\{x | x<\\\\frac{3}{2}\\\\right\\\\}$', '$A \\\\cup B=R$']", "type": 6}
-{"stem": "为评估一种农作物的种植效果，选了$n$块地作试验田．这n块地的亩产量（单位：$kg$）分别是$\\mathrm{X}_{1}, \\quad \\mathrm{X}_{2}, \\quad \\ldots, \\quad \\mathrm{X}_{n}$，下面给出的指标中可以用来评估这种农作物亩产量稳定程度的是（　　）", "options": "['$\\\\mathrm{X}_{1}, \\\\quad \\\\mathrm{X}_{2}, \\\\quad \\\\ldots, \\\\quad \\\\mathrm{X}_{n}$的平均数', '$\\\\mathrm{X}_{1}, \\\\quad \\\\mathrm{X}_{2}, \\\\quad \\\\ldots, \\\\quad \\\\mathrm{X}_{n}$的标准差', '$\\\\mathrm{X}_{1}, \\\\quad \\\\mathrm{X}_{2}, \\\\quad \\\\ldots, \\\\quad \\\\mathrm{X}_{n}$的最大值', '$\\\\mathrm{X}_{1}, \\\\quad \\\\mathrm{X}_{2}, \\\\quad \\\\ldots, \\\\quad \\\\mathrm{X}_{n}$的中位数']", "type": 6}
-{"stem": "下列各式的运算结果为纯虚数的是（　　）", "options": "['$i (1+i)^{2}$', '$i^{2}(1-i)$', '$(1+i)^{2}$', '$i (1+i)$']", "type": 6}
-{"stem": "如图，正方形$ABCD$内的图形来自中国古代的太极图．正方形内切圆中的黑色部分和白色部分关于正方形的中心成中心对称．在正方形内随机取一点，则此点取自黑色部分的概率是（　　）$\\FigureID{3bf52b64-8af1-11eb-93d0-b46bfc50aa29}$$\\FigureID{59bb042e-8af1-11eb-8177-b46bfc50aa29}$$\\FigureID{08917c3a-8b7c-11eb-8926-b46bfc50aa29}$", "options": "['$\\\\frac{1}{4}$', '$\\\\frac{\\\\pi}{8}$', '$\\\\frac{1}{2}$', '$\\\\frac{\\\\pi}{4}$']", "type": 6}
-{"stem": "已知$F$是双曲线$C: x^{2}-\\frac{y^{2}}{3}=1$的右焦点，$P$是$C$上一点，且$PF$与$x$轴垂直，点$A$的坐标是$（1，3）$，则$\\triangle \\mathrm{APF}$的面积为（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$', '$\\\\frac{3}{2}$']", "type": 6}
-{"stem": "如图，在下列四个正方体中，$A，B$为正方体的两个顶点，$M，N，Q$为所在棱的中点，则在这四个正方体中，直线$AB$与平面$MNQ$不平行的是（　　）", "options": "['$\\\\LUNAPictureID{3bfd3df2-8af1-11eb-b864-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3ca-8af1-11eb-a246-b46bfc50aa29}$$\\\\LUNAPictureID{0896e422-8b7c-11eb-b0d5-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3df3-8af1-11eb-942a-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3cb-8af1-11eb-a9f9-b46bfc50aa29}$$\\\\LUNAPictureID{0896e423-8b7c-11eb-a3d8-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3df4-8af1-11eb-93bb-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3cc-8af1-11eb-9b94-b46bfc50aa29}$$\\\\LUNAPictureID{0896e424-8b7c-11eb-bc81-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3df5-8af1-11eb-943e-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3cd-8af1-11eb-9c65-b46bfc50aa29}$$\\\\LUNAPictureID{0896e425-8b7c-11eb-b9ed-b46bfc50aa29}$']", "type": 6}
-{"stem": "设$x，y$满足约束条件$\\left\\{\\begin{array}{l}x+3 y \\leq 3 \\ x-y \\geq 1 \\ y \\geq 0\\end{array}\\right.$ ，则$z=x+y$的最大值为（　　）", "options": "['$0$', '$1$', '$2$', '$3$']", "type": 6}
-{"stem": "函数 $y=\\frac{\\sin 2 x}{1-\\cos x}$ 的部分图象大致为（　　）", "options": "['$\\\\LUNAPictureID{3bfd3df6-8af1-11eb-965f-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3ce-8af1-11eb-ab1d-b46bfc50aa29}$$\\\\LUNAPictureID{0896e426-8b7c-11eb-b02e-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd3df7-8af1-11eb-b2e4-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3cf-8af1-11eb-acb4-b46bfc50aa29}$$\\\\LUNAPictureID{0896e427-8b7c-11eb-9b5d-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd6524-8af1-11eb-8be3-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3d0-8af1-11eb-aea9-b46bfc50aa29}$$\\\\LUNAPictureID{0896e428-8b7c-11eb-8047-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd6525-8af1-11eb-b6d5-b46bfc50aa29}$$\\\\LUNAPictureID{59c2f3d1-8af1-11eb-b75c-b46bfc50aa29}$$\\\\LUNAPictureID{0896e429-8b7c-11eb-bf3a-b46bfc50aa29}$']", "type": 6}
-{"stem": "已知函数$f(x)=\\ln x+\\ln (2-x)$，则（　　）", "options": "['$f（x）$在$（0，2）$单调递增\\t', '$f（x）$在$（0，2）$单调递减', '$y=f（x）$的图象关于直线$x=1$对称\\t', '$y=f（x）$的图象关于点$（1，0）$对称\\t']", "type": 6}
-{"stem": "如图程序框图是为了求出满足$3^{n}-2^{n}>1000$的最小偶数$n$，那么在 和 两个空白框中，可以分别填入（　　）$\\FigureID{3bf55286-8af1-11eb-a50e-b46bfc50aa29}$$\\FigureID{59bb2b40-8af1-11eb-82d0-b46bfc50aa29}$$\\FigureID{08917c3b-8b7c-11eb-83f1-b46bfc50aa29}$", "options": "['$A>1000$和$n=n+1$', '$A＞1000$和$n=n+2$', '$A≤1000$和$n=n+1$', '$A≤1000$和$n=n+2$']", "type": 6}
-{"stem": "$\\triangle \\mathrm{ABC}$的内角$A，B，C$的对边分别为$a，b，c，$已知 $\\sin B+\\sin A(\\sin C-\\cos C)=0$，$a=2$，$c=\\sqrt{2}$ ，则$C=$（　　）", "options": "['$\\\\frac{\\\\pi}{12}$', '$\\\\frac{\\\\pi}{6}$', '$\\\\frac{\\\\pi}{4}$', '$\\\\frac{\\\\pi}{3}$']", "type": 6}
-{"stem": "设$A，B$是椭圆$c: \\frac{x^{2}}{3}+\\frac{y^{2}}{m}=1$长轴的两个端点，若$C$上存在点$M$满足$\\angle \\mathrm{AMB}=120^{\\circ}$，则$m$的取值范围是（　　）", "options": "['(0,1]$\\\\cup[9,+\\\\infty)$', '$(0, \\\\sqrt{3}] \\\\cup[9,+\\\\infty)$', '$(0, 1] \\\\cup[4,+\\\\infty)$', '$(0, \\\\sqrt{3}] \\\\cup[4,+\\\\infty)$']", "type": 6}
-{"stem": "已知向量 $\\vec{a}=(-1,2), \\vec{b}=(m, 1)$，若向量 $\\vec{a}+\\vec{b}$ 与 垂直，则$m=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "曲线$y=x^{2}+\\frac{1}{x}$在点$（1，2）$处的切线方程为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "已知$\\alpha \\in\\left(0, \\frac{\\pi}{2}\\right), \\tan \\alpha=2$，则$\\cos \\left(\\alpha-\\frac{\\pi}{4}\\right)$ =_______", "options": "[]", "type": 2}
-{"stem": "已知三棱锥$S-ABC$的所有顶点都在球$O$的球面上，$SC$是球$O$的直径．若平面$\\mathrm{SCA} \\perp$平面$SCB$，$SA=AC$，$SB=BC$，三棱锥$S-ABC$的体积为$9$，则球$O$的表面积为_______", "options": "[]", "type": 2}
-{"stem": "记$\\mathrm{S}_{n}$为等比数列$\\left\\{a_{n}\\right\\}$的前$n$项和．已知$\\mathrm{S}_{2}=2, \\quad \\mathrm{S}_{3}=-6$．（1）求$\\left\\{a_{n}\\right\\}$的通项公式；（2）求$\\mathrm{S}_{n}$，并判断$S_{n+1}, \\quad S_{n}, \\quad S_{n+2}$是否成等差数列．", "options": "[]", "type": 4}
-{"stem": "如图，在四棱锥$P-ABCD$中，$AB/ / CD$，且$\\angle BAP=\\angle{CDP}=90^{\\circ}$．（1）证明：平面$PAB \\perp$平面$PAD$；（2）若$\\mathrm{PA}=\\mathrm{PD}=\\mathrm{AB}=\\mathrm{DC}, \\quad \\angle \\mathrm{APD}=90^{\\circ}$，且四棱锥$P-ABCD$的体积为$\\frac{8}{3}$ ，求该四棱锥的侧面积．", "options": "[]", "type": 4}
-{"stem": "为了监控某种零件的一条生产线的生产过程，检验员每隔$30min$从该生产线上随机抽取一个零件，并测量其尺寸（单位$：cm$）．下面是检验员在一天内依次抽取的$16$个零件的尺寸：\n经计算得 $\\bar{x}=\\frac{1}{16} \\sum_{i=1}^{16} x_{i}=9.97, \\quad s=\\sqrt{\\frac{1}{16} \\sum_{i=1}^{16}\\left(x_{i}-\\bar{x}\\right)^{2}}=\\sqrt{\\frac{1}{16}\\left(\\sum_{i=1}^{16} x_{i}^{2}-16 \\bar{x}^{2}\\right)} \\approx 0.212$，$\\sqrt{\\sum_{i=1}^{16}(i-8.5)^{2}} \\approx 18.439$，$\\sum_{i=1}^{16}\\left(x_{i}-\\bar{x}\\right)(i-8.5)=-2.78$，其中$x_{i}$为抽取的第$i$个零件的尺寸，$\\mathrm{i}=1, \\quad 2, \\ldots, 16$．（1）求$\\left(x_{i}, \\text { i) }(i=1,2, \\dots, 16)\\right.$的相关系数$r$，并回答是否可以认为这一天生产的零件尺寸不随生产过程的进行而系统地变大或变小（若$|r|<0.25$，则可以认为零件的尺寸不随生产过程的进行而系统地变大或变小）．（2）一天内抽检零件中，如果出现了尺寸在$(\\bar{x}-3 s, \\bar{x}+3 s)$之外的零件，就认为这条生产线在这一天的生产过程可能出现了异常情况，需对当天的生产过程进行检查．\n（ⅰ）从这一天抽检的结果看，是否需对当天的生产过程进行检查？\n（ⅱ）在$(\\bar{x}-3 s, \\bar{x}+3 s)$之外的数据称为离群值，试剔除离群值，估计这条生产线当天生产的零件尺寸的均值与标准差．（精确到$0.01$）\n附：样本$\\left(x_{i}, y_{i}\\right)(i=1,2, \\ldots, n)$的相关系数$r=\\frac{\\sum_{i=1}^{n}\\left(x_{i}-\\bar{x}\\right)\\left(y_{i}-\\bar{y}\\right)}{\\sqrt{\\sum_{i=1}^{n}\\left(x_{i}-\\bar{x}\\right)^{2}} \\sqrt{\\sum_{i=1}^{n}\\left(y_{i}-\\bar{y}\\right)^{2}}}$，$\\sqrt{0.008} \\approx 0.09$．", "options": "[]", "type": 4}
-{"stem": "设$A，B$为曲线$C: \\quad y=\\frac{x^{2}}{4}$上两点，$A$与$B$的横坐标之和为$4$．（1）求直线$AB$的斜率；（2）设$M$为曲线$C$上一点，$C$在$M$处的切线与直线$AB$平行，且$\\mathrm{AM} \\perp \\mathrm{BM}$，求直线$AB$的方程．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=e^{x}\\left(e^{x}-a\\right)-a^{2} x$．（1）讨论$f(x)$的单调性；（2）若$f(x) \\geqslant 0$，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$x O y$中，曲线$C$的参数方程为$\\left\\{\\begin{array}{l}x=3 \\cos \\theta \\ y=\\sin \\theta\\end{array}\\right.$ ，（$\\theta$为参数），直线 $l$ 的参数方程为 $\\left\\{\\begin{array}{l}x=a+4 t \\ y=1-t\\end{array}\\right.$ ，（$t$为参数）．（1）若$a=-1$，求$C$与 $l$ 的交点坐标；（2）若$C$上的点到 $l$ 距离的最大值为$\\sqrt{17}$ ，求$a$．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=-x^{2}+a x+4, \\quad g(x)=|x+1|+|x-1|$．（1）当$a=1$时，求不等式$f(x) \\geqslant g(x)$的解集；（2）若不等式$f(x) \\geqslant g(x)$的解集包含$[﹣1，1]$，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{0,2\\}, \\quad B=\\{-2,-1,0,1,2\\}$，则$A \\cap B$=（　　）", "options": "['$\\\\{0,2\\\\}$', '$\\\\{1,2\\\\}$', '$\\\\{0\\\\}$', '$\\\\{-2,-1,0,1,2\\\\}$']", "type": 6}
-{"stem": "设$z=\\frac{1-i}{1+i}+2 i$，则$|z|$=（　　）", "options": "['$0$', '$\\\\frac{1}{2}$', '$1$', '$\\\\sqrt{2}$']", "type": 6}
-{"stem": "某地区经过一年的新农村建设，农村的经济收入增加了一倍，实现翻番．为更好地了解该地区农村的经济收入变化情况，统计了该地区新农村建设前后农村的经济收入构成比例，得到如下饼图：\n则下面结论中不正确的是（　　）$\\FigureID{3bf57990-8af1-11eb-9e9a-b46bfc50aa29}$$\\FigureID{59bb524a-8af1-11eb-be72-b46bfc50aa29}$$\\FigureID{0891a810-8b7c-11eb-b721-b46bfc50aa29}$", "options": "['新农村建设后，种植收入减少', '新农村建设后，其他收入增加了一倍以上\\t', '新农村建设后，养殖收入增加了一倍', '新农村建设后，养殖收入与第三产业收入的总和超过了经济收入的一半']", "type": 6}
-{"stem": "已知椭圆$C: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{4}=1$的一个焦点为(2,0)，则C的离心率为（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{\\\\sqrt{2}}{2}$', '$\\\\frac{2 \\\\sqrt{2}}{3}$']", "type": 6}
-{"stem": "已知圆柱的上、下底面的中心分别为$\\mathrm{O}_{1}, \\mathrm{O}_{2}$，过直线$\\mathrm{O}_{1}\\mathrm{O}_{2}$的平面截该圆柱所得的截面是面积为8的正方形，则该圆柱的表面积为（　　）", "options": "['$12 \\\\sqrt{2} \\\\pi$', '$12 \\\\pi$', '$8 \\\\sqrt{2} \\\\pi$', '$10 \\\\pi$']", "type": 6}
-{"stem": "设函数$f(x)=x^{3}+(a-1) x^{2}+a x$．若$f(x)$为奇函数，则曲线$y=f(x)$在点$（0，0）$处的切线方程为（　　）", "options": "['$y=-2 x$', '$y=- x$', '$y=2 x$', '$y=x$']", "type": 6}
-{"stem": "在$\\triangle \\mathrm{ABC}$中，$AD$为$BC$边上的中线，$E$为$AD$的中点，则$\\overrightarrow{\\mathrm{EB}}$=（　　）", "options": "['$\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AB}}-\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AC}}$', '$\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AB}}-\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AC}}$', '$\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AB}}+\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AC}}$', '$\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AB}}+\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AC}}$']", "type": 6}
-{"stem": "已知函数$f(x)=2 \\cos ^{2} x-\\sin ^{2} x+2$，则（　　）", "options": "['$f(x)$的最小正周期为$\\\\pi$，最大值为3\\t', '$f(x)$的最小正周期为$\\\\pi$，最大值为4\\t', '$f(x)$的最小正周期为$2\\\\pi$，最大值为3', '$f(x)$的最小正周期为$2\\\\pi$，最大值为4\\t']", "type": 6}
-{"stem": "某圆柱的高为2，底面周长为16，其三视图如图．圆柱表面上的点$M$在正视图上的对应点为A，圆柱表面上的点$N$在左视图上的对应点为$B$，则在此圆柱侧面上，从$M$到$N$的路径中，最短路径的长度为（　　）$\\FigureID{3bf57991-8af1-11eb-9185-b46bfc50aa29}$$\\FigureID{59bb795a-8af1-11eb-a7f4-b46bfc50aa29}$$\\FigureID{0891a811-8b7c-11eb-ab00-b46bfc50aa29}$", "options": "['$2 \\\\sqrt{17}$', '$2 \\\\sqrt{5}$', '3', '2']", "type": 6}
-{"stem": "在长方体$\\mathrm{ABCD}-\\mathrm{A}_{1} \\mathrm{B}_{1} \\mathrm{C}_{1} \\mathrm{D}_{1}$中，$AB=BC=2$，$A C_{1}$与平面$\\mathrm{BB}_{1} \\mathrm{C}_{1} \\mathrm{C}$所成的角为$30^{\\circ}$，则该长方体的体积为（　　）", "options": "['$8$', '$6 \\\\sqrt{2}$', '$8 \\\\sqrt{2}$', '$8 \\\\sqrt{3}$']", "type": 6}
-{"stem": "已知角$\\alpha$的顶点为坐标原点，始边与x轴的非负半轴重合，终边上有两点$A(1, a), B \\quad(2, b)$，且$\\cos 2 a=\\frac{2}{3}$，则$|a-b|$=（　　）", "options": "['$\\\\frac{1}{5}$', '$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{2 \\\\sqrt{5}}{5}$', '1']", "type": 6}
-{"stem": "设函数$f(x)=\\left\\{\\begin{array}{ll}2^{-x}, & x \\leqslant 0 \\ 1, & x>0\\end{array}\\right.$，则满足$f(x+1)<f(2 x)$的x的取值范围是（　　）", "options": "['$(-\\\\infty,-1]$', '$(0,+\\\\infty)$', '(-1,0)', '$(-\\\\infty,0)$']", "type": 6}
-{"stem": "已知函数$f(x)=\\log _{2}\\left(x^{2}+a\\right)$，若$f(3)=1$，则a=_______．", "options": "[]", "type": 2}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x-2 y-2 \\leq 0 \\ x-y+1 \\geqslant 0 \\ y \\leq 0\\end{array}\\right.$，则$z=3x+2y$的最大值为_______", "options": "[]", "type": 2}
-{"stem": "直线 y=x+1 与圆 $x^{2}+y^{2}+2 y-3=0$ 交于 $A, \\quad B$ 两点, 则 $|AB|=$_______", "options": "[]", "type": 2}
-{"stem": "$\\triangle \\mathrm{ABC}$的内角$A，B，C$的对边分别为$a，b，c$．已知$\\mathrm{b} \\sin \\mathrm{C}+\\mathrm{c} \\sin \\mathrm{B}=4 \\mathrm{asinB} \\sin \\mathrm{C}, \\quad \\mathrm{b}^{2}+\\mathrm{c}^{2}-\\mathrm{a}^{2}=8$，则$\\triangle \\mathrm{ABC}$的面积为_______", "options": "[]", "type": 2}
-{"stem": "已知数列$\\{a_n\\}$ 满足 $a_{1}=1, \\quad \\mathrm{na}_{n+1}=2 \\quad(\\mathrm{n}+1) \\quad a_{n}, \\quad$ 设 $\\mathrm{b}_{n}=\\frac{\\mathrm{a}_{\\mathrm{n}}}{\\mathrm{n}}$求 b $_{1}, \\quad \\mathrm{b}_{2}, \\quad \\mathrm{b}_{3}$;判断数列$\\{b_n\\}$是否为等比数列，并说明理由;求$\\{a_{n}\\}$的通项公式．", "options": "[]", "type": 4}
-{"stem": "如图，在平行四边形ABCM中，$AB=AC=3$，$\\angle \\mathrm{ACM}=90^{\\circ}$，以AC为折痕将$\\triangle \\mathrm{ACM}$折起，使点M到达点D的位置，且$\\mathrm{AB} \\perp \\mathrm{DA}$．证明：平面ACD$\\perp$平面ABC；Q为线段AD上一点，P为线段BC上一点，且$\\mathrm{BP}=\\mathrm{DQ}=\\frac{2}{3} \\mathrm{DA}$，求三棱锥Q﹣ABP的体积．$\\FigureID{3bf5a0b4-8af1-11eb-a677-b46bfc50aa29}$$\\FigureID{59bb795b-8af1-11eb-b8f2-b46bfc50aa29}$$\\FigureID{0891a812-8b7c-11eb-b52f-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "某家庭记录了未使用节水龙头50天的日用水量数据（单位：m3）和使用了节水龙头50天的日用水量数据，得到频数分布表如下：作出使用了节水龙头50天的日用水量数据的频率分布直方图估计该家庭使用节水龙头后，日用水量小于$0.35m^3$的概率;估计该家庭使用节水龙头后，一年能节省多少水？（一年按365天计算，同一组中的数据以这组数据所在区间中点的值作代表）", "options": "[]", "type": 4}
-{"stem": "设抛物线$\\mathrm{C}: \\quad \\mathrm{y}^{2}=2 \\mathrm{x}$，点$A(2,0), B(-2,0)$，过点A的直线l与C交于M，N两点．当$I$与$x$轴垂直时，求直线$BM$的方程；证明：$\\angle \\mathrm{ABM}=\\angle \\mathrm{ABN}$.", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=a e^{x}-\\ln x-1$设$x=2$是$f(x)$的极值点，求$a$，并求$f(x)$的单调区间；证明：当$a \\geqslant \\frac{1}{e}$时，$f(x) \\geqslant 0$.", "options": "[]", "type": 4}
-{"stem": "（二）选考题：共10分。请考生在第22、23题中任选一题作答。如果多做，则按所做的第一题计分。[选修4-4：坐标系与参数方程]\n在直角坐标系xOy中，曲线$\\mathrm{C}_{1}$的方程为$y=k|x|+2$．以坐标原点为极点，x轴正半轴为极轴建立极坐标系，曲线$\\mathrm{C}_{2}$的极坐标方程为$\\rho^{2}+2 \\rho \\cos \\theta -3 = 0$求$\\mathrm{C}_{2}$的直角坐标方程；若$\\mathrm{C}_{1}$与$\\mathrm{C}_{2}$有且仅有三个公共点，求$\\mathrm{C}_{1}$的方程", "options": "[]", "type": 4}
-{"stem": "已知$f(x)=|x+1|-|a x-1|$当$a=1$时，求不等式$f(x)＞1$的解集；若$x \\in(0,1)$时不等式$f(x)>x$成立，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "设$z=\\frac{3-i}{1+2 i}$，则$|z|=$", "options": "['$2$', '$\\\\sqrt{3}$', '$\\\\sqrt{2}$', '$1$']", "type": 6}
-{"stem": "已知集合$U=\\{1,2,3,4,5,6,7\\}, \\quad A=\\{2,3,4,5\\}, \\quad B=\\{2,3,6,7\\}$, 则$B \\cap \\mathrm{C}_{U} A$", "options": "['$\\\\{1,6\\\\}$', '$\\\\{1,7\\\\}$', '$\\\\{6,7\\\\}$', '$\\\\{1,6,7\\\\}$']", "type": 6}
-{"stem": "已知$a=\\log _{2} 0.2, b=2^{0.2}, c=0.2^{0.3}$，则", "options": "['$a<b<c$', '$a<c<b$', '$c<a<b$', '$b<c<a$']", "type": 6}
-{"stem": "古希腊时期，人们认为最美人体的头顶至肚脐的长度与肚脐至足底的长度之比是$\\frac{\\sqrt{5}-1}{2}$（$\\frac{\\sqrt{5}-1}{2}$≈0.618，称为黄金分割比例)，著名的“断臂维纳斯”便是如此．此外，最美人体的头顶至咽喉的长度与咽喉至肚脐的长度之比也是$\\frac{\\sqrt{5}-1}{2}$．若某人满足上述两个黄金分割比例，且腿长为105cm，头顶至脖子下端的长度为26 cm，则其身高可能是$\\FigureID{3bf5c7d8-8af1-11eb-8c2d-b46bfc50aa29}$$\\FigureID{59bba09e-8af1-11eb-98d0-b46bfc50aa29}$$\\FigureID{0891cf22-8b7c-11eb-99a9-b46bfc50aa29}$", "options": "['165 cm', '175 cm', '185 cm', '190 cm']", "type": 6}
-{"stem": "函数$f(x)=\\frac{\\sin x+x}{\\cos x+x^{2}}$ 在 $[-\\pi, \\pi]$图像大致为", "options": "['$\\\\LUNAPictureID{3bfd968c-8af1-11eb-9fdc-b46bfc50aa29}$$\\\\LUNAPictureID{59c341ba-8af1-11eb-a035-b46bfc50aa29}$$\\\\LUNAPictureID{0896e42a-8b7c-11eb-82b9-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd968d-8af1-11eb-bdf8-b46bfc50aa29}$$\\\\LUNAPictureID{59c341bb-8af1-11eb-8c56-b46bfc50aa29}$$\\\\LUNAPictureID{0896e42b-8b7c-11eb-810e-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd968e-8af1-11eb-b68a-b46bfc50aa29}$$\\\\LUNAPictureID{59c341bc-8af1-11eb-af78-b46bfc50aa29}$$\\\\LUNAPictureID{0896e42c-8b7c-11eb-ba07-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfd968f-8af1-11eb-ba1c-b46bfc50aa29}$$\\\\LUNAPictureID{59c368fe-8af1-11eb-800d-b46bfc50aa29}$$\\\\LUNAPictureID{0896e42d-8b7c-11eb-b743-b46bfc50aa29}$']", "type": 6}
-{"stem": "某学校为了解$1000$名新生的身体素质，将这些学生编号为1，2，…，1 000，从这些新生中用系统抽样方法等距抽取100名学生进行体质测验，若46号学生被抽到，则下面4名学生中被抽到的是", "options": "[' 8号学生', '200号学生', ' 616号学生', '815号学生']", "type": 6}
-{"stem": "$\\tan 255^{\\circ}=$", "options": "['$-2-\\\\sqrt{3}$', '$-2+\\\\sqrt{3}$', '$2-\\\\sqrt{3}$', '$2+\\\\sqrt{3}$']", "type": 6}
-{"stem": "已知非零向量$\\mathbf{a}, \\mathbf{b}$满足$|a|=2|b|$，且$(\\mathbf{a}-\\mathbf{b}) \\perp \\mathbf{b}$，则$\\mathbf{a}$与$\\mathbf{b}$的夹角为", "options": "['$\\\\frac{\\\\pi}{6}$', '$\\\\frac{\\\\pi}{3}$', '$\\\\frac{2 \\\\pi}{3}$', '$\\\\frac{5 \\\\pi}{6}$']", "type": 6}
-{"stem": "如图是求$\\frac{1}{2+\\frac{1}{2 + \\frac{1}{2}}}$的程序框图，图中空白框中应填入$\\FigureID{3bf5c7d9-8af1-11eb-a922-b46bfc50aa29}$$\\FigureID{59bba09f-8af1-11eb-9c4b-b46bfc50aa29}$$\\FigureID{0891cf23-8b7c-11eb-aed3-b46bfc50aa29}$", "options": "['$A=\\\\frac{1}{2+A}$', '$A=2+\\\\frac{1}{A}$', '$A=\\\\frac{1}{1+2 A}$', '$A=1+\\\\frac{1}{2 A}$']", "type": 6}
-{"stem": "双曲线$C: \\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$的 一条渐近线的倾斜角为$130^{\\circ}$，则C的离心率为", "options": "['$2 \\\\sin 40^{\\\\circ}$', '$2 \\\\cos 40^{\\\\circ}$', '$\\\\frac{1}{\\\\sin 50^{\\\\circ}}$', '$\\\\frac{1}{\\\\cos 50^{\\\\circ}}$']", "type": 6}
-{"stem": "$\\triangle A B C$的内角$A，B，C$的对边分别为$a，b，c$，已知$a \\sin A-b \\sin B=4 c \\sin C, \\quad \\cos A=-\\frac{1}{4}$，则$\\frac{b}{c}=$", "options": "['6', '5', '4', '3']", "type": 6}
-{"stem": "已知椭圆$C$的焦点为$F_{1}(-1,0), \\quad F_{2}(1,0)$，过$F_{2}$的直线与$C$交于$A，B$两点.若$\\left|A F_{2}\\right|=2\\left|F_{2} B\\right|,|A B|=\\left|B F_{1}\\right|$，则$C$的方程为", "options": "['$\\\\frac{x^{2}}{2}+y^{2}=1$', '$\\\\frac{x^{2}}{3}+\\\\frac{y^{2}}{2}=1$', '$\\\\frac{x^{2}}{4}+\\\\frac{y^{2}}{3}=1$', '$\\\\frac{x^{2}}{5}+\\\\frac{y^{2}}{4}=1$']", "type": 6}
-{"stem": "曲线$y=3\\left(x^{2}+x\\right) e^{x}$在点$(0,0)$处的切线方程为$\\SIFBlank$．", "options": "[]", "type": 2}
-{"stem": "记$S_{n}$为等比数列$\\left\\{a_{n}\\right\\}$的前$n$项和.若$a_{1}=1, \\quad S_{3}=\\frac{3}{4}$，则$S_{4}$=_______", "options": "[]", "type": 2}
-{"stem": "函数$f(x)=\\sin \\left(2 x+\\frac{3 \\pi}{2}\\right)-3 \\cos x$的最小值为$\\SIFBlank$．", "options": "[]", "type": 2}
-{"stem": "已知$\\angle A C B=90^{\\circ}$，$P$为平面$ABC$外一点，$PC=2$，点$P$到$\\angle A C B$两边$AC，BC$的距离均为$\\sqrt{3}$，那么$P$到平面$ABC$的距离为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "某商场为提高服务质量，随机调查了50名男顾客和50名女顾客，每位顾客对该商场的服务给出满意或不满意的评价，得到下面列联表：\n附：$K^{2}=\\frac{n(a d-b c)^{2}}{(a+b)(c+d)(a+c)(b+d)}$分别估计男、女顾客对该商场服务满意的概率；能否有95%的把握认为男、女顾客对该商场服务的评价有差异？", "options": "[]", "type": 4}
-{"stem": "记$S_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前$n$项和，已知$S_{9}=-a_{5}$若$a_{3}=4$，求$\\left\\{a_{n}\\right\\}$的通项公式；若$a_{1}>0$，求使得$S_{n} \\geq a_{n}$的$n$的取值范围．", "options": "[]", "type": 4}
-{"stem": "如图，直四棱柱$A B C D-A_{1} B_{1} C_{1} D_{1}$的底面是菱形，$A A_{1}=4, \\quad A B=2, \\quad \\angle B A D=60^{\\circ}, \\quad E, \\quad M, \\quad N$分别是$B C, \\quad B B_{1}, \\quad A_{1} D$的中点.证明：$M N / /$ 平面 $C_{1} D E$；求点$C$到平面$C_{I} D E$的距离.$\\FigureID{3bf5eefa-8af1-11eb-9679-b46bfc50aa29}$$\\FigureID{59bbc792-8af1-11eb-a65f-b46bfc50aa29}$$\\FigureID{0891cf24-8b7c-11eb-98ec-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": ".已知函数$f(x)=2 \\sin x-x \\cos x-x, f^{\\prime}(x)$ 为 $f(x)$的导数．证明：$f^{\\prime}(x)$ 在区间 $(0, \\pi)$存在唯一零点；若$x \\in[0, \\pi]$ 时, $f(x) \\geq a x$，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "已知点$A，B$关于坐标原点$O$对称，$|A B|=A$，$\\odot M$过点$A，B$且与直线$x+2=0$相切．若$A$在直线$x+y=0$上，求$\\odot M$的半径是否存在定点$P$，使得当$A$运动时，$|MA|-|MP|$为定值？并说明理由．", "options": "[]", "type": 4}
-{"stem": "（二）选考题：共10分。请考生在第22、23题中任选一题作答，如果多做，则按所做的第一题计分。[选修4-4：坐标系与参数方程] \n在直角坐标系$x O y$中，曲线C的参数方程为$\\left\\{\\begin{array}{l}x=\\frac{1-t^{2}}{1+t^{2}} \\ y=\\frac{4 t}{1+t^{2}}\\end{array}\\right.$（t为参数），以坐标原点$O$为极点，$x$轴的正半轴为极轴建立极坐标系，直线$l$的极坐标方程为$2 p \\cos \\theta+\\sqrt{3} \\rho \\sin \\theta+11=0$．求$C$和$l$的直角坐标方程；求$C$上的点到$l$距离的最小值.", "options": "[]", "type": 4}
-{"stem": "[选修4-5：不等式选讲]\n已知$a，b，c$为正数，且满足$a b c=1$．证明：$\\frac{1}{a}+\\frac{1}{b}+\\frac{1}{c} \\leq a^{2}+b^{2}+c^{2}$；$(a+b)^{3}+(b+c)^{3}+(c+a)^{3} \\geq 24$", "options": "[]", "type": 4}
-{"stem": "设集合$A=\\{0,2,4,6,8,10\\}, B=\\{4,8\\}$，则$C_{A}B$=（　　）", "options": "['$\\\\{4,8\\\\}$', '$\\\\{0,2,6\\\\}$', '$\\\\{0,2,6,10\\\\}$', '$\\\\{0,2,4,6,8,10\\\\}$']", "type": 6}
-{"stem": "若$z=4+3i$，则$\\frac{\\bar{z}}{|z|}$=（　　）", "options": "['$1$', '$-1$', '$\\\\frac{4}{5}+\\\\frac{3}{5}i$', '$\\\\frac{4}{5}-\\\\frac{3}{5}i$']", "type": 6}
-{"stem": "已知向量$\\vec{BA}=(\\frac{1}{2},\\frac{\\sqrt{3}}{2}),\\vec{BC}=(\\frac{\\sqrt{3}}{2},\\frac{1}{2})$，则$\\angle ABC=$$\\SIFChoice$，", "options": "['$30^{\\\\circ}$', '$45^{\\\\circ}$', '$60^{\\\\circ}$', '$120^{\\\\circ}$']", "type": 6}
-{"stem": "某旅游城市为向游客介绍本地的气温情况，绘制了一年中各月平均最高气温和平均最低气温的雷达图，图中A点表示十月的平均最高气温约为15℃，B点表示四月的平均最低气温约为5℃，下面叙述不正确的是（　　）$\\FigureID{3bf615d8-8af1-11eb-a55d-b46bfc50aa29}$$\\FigureID{59bbc793-8af1-11eb-90de-b46bfc50aa29}$$\\FigureID{08920228-8b7c-11eb-aa23-b46bfc50aa29}$", "options": "['各月的平均最低气温都在0℃以上\\t', '七月的平均温差比一月的平均温差大', '三月和十一月的平均最高气温基本相同', '平均最高气温高于20℃的月份有5个\\t']", "type": 6}
-{"stem": "小敏打开计算机时，忘记了开机密码的前两位，只记得第一位是M，I，N中的一个字母，第二位是1，2，3，4，5中的一个数字，则小敏输入一次密码能够成功开机的概率是（　　）", "options": "['$\\\\frac{8}{15}$', '$\\\\frac{1}{8}$', '$\\\\frac{1}{15}$', '$\\\\frac{1}{30}$']", "type": 6}
-{"stem": "若$\\tan \\theta=\\frac{1}{3}$ ，则$\\cos 2\\theta$=（　　）", "options": "['$-\\\\frac{4}{5}$', '$-\\\\frac{1}{5}$', '$\\\\frac{1}{5}$', '$\\\\frac{4}{5}$']", "type": 6}
-{"stem": "已知$a=2^{\\frac{4}{3}} ,b=3^{\\frac{2}{3}} ,c=25^{\\frac{1}{3}}$，则（　　）", "options": "['$b<a<c$', '$a<b<c$', '$b<c<a$', '$c<a<b$']", "type": 6}
-{"stem": "执行如图程序框图，如果输入的$a=4，b=6$，那么输出的$n$=（　　）$\\FigureID{3bf615d9-8af1-11eb-a4d4-b46bfc50aa29}$$\\FigureID{59bbc794-8af1-11eb-88a3-b46bfc50aa29}$$\\FigureID{08920229-8b7c-11eb-8fd0-b46bfc50aa29}$", "options": "['3', '4', '5', '6']", "type": 6}
-{"stem": "在$\\triangle ABC$中，$B=\\frac{\\pi}{4}$ ，BC边上的高等于$\\frac{1}{3}$BC，则$\\sin A$=（　　）", "options": "['$\\\\frac{3}{10}$', '$\\\\frac{\\\\sqrt{10}}{10}$', '$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{3\\\\sqrt{10}}{10}$']", "type": 6}
-{"stem": "如图，网格纸上小正方形的边长为1，粗实线画出的是某多面体的三视图，则该多面体的表面积为（　　）$\\FigureID{3bf615da-8af1-11eb-8fbe-b46bfc50aa29}$$\\FigureID{59bbee9c-8af1-11eb-a312-b46bfc50aa29}$$\\FigureID{0892022a-8b7c-11eb-9643-b46bfc50aa29}$", "options": "['$18+36\\\\sqrt{5}$', '$54+18\\\\sqrt{5}$', '$90$', '$81$']", "type": 6}
-{"stem": "在封闭的直三棱柱$ABC﹣A_1B_1C_1$内有一个体积为V的球，若$AB\\perp BC，AB=6，BC=8，AA_1=3$，则V的最大值是（　　）", "options": "['$4\\\\pi$', '$\\\\frac{9\\\\pi}{2}$', '$6\\\\pi$', '$\\\\frac{32\\\\pi}{3}$']", "type": 6}
-{"stem": "已知$O$为坐标原点，F是椭圆$C: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1 \\quad(a>b>0)$的左焦点，A，B分别为C的左，右顶点．P为C上一点，且$PF\\perp x$轴，过点A的直线l与线段PF交于点M，与y轴交于点E．若直线BM经过OE的中点，则C的离心率为（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$', '$\\\\frac{3}{4}$']", "type": 6}
-{"stem": "设x，y满足约束条件$\\left\\{\\begin{array}{l}2 x-y+1 \\geqslant 0 \\ x-2 y-1 \\leqslant 0 \\ x \\leqslant 1\\end{array}\\right.$ ，则$z=2x+3y-5$的最小值为_______", "options": "[]", "type": 2}
-{"stem": "函数$y=\\sin x-\\sqrt{3}\\cos x$的图象可由函数$y=2\\sin x$的图象至少向右平移$\\SIFBlank$个单位长度得到", "options": "[]", "type": 2}
-{"stem": "已知直线I: $x-\\sqrt{3} y+6=0$与圆$x^{2}+y^{2}=12$交于A，B两点，过A，B分别作l的垂线与x轴交于C，D两点．则|CD|=_______", "options": "[]", "type": 2}
-{"stem": "已知$f(x)$为偶函数，当$x≤0$时，$f(x)=e^{-x-1}-x$，则曲线$y=f(x)$在点（1，2）处的切线方程是_______", "options": "[]", "type": 2}
-{"stem": "已知各项都为正数的数列$\\{a_n\\}$满足$a_{1}=1, a_{n}^{2}-\\left(2 a_{n+1}-1\\right) a_{n}-2 a_{n+1}=0$求$a_2,a_3$求$\\{a_n\\}$的通项公式", "options": "[]", "type": 4}
-{"stem": "如图是我国2008年至2014年生活垃圾无害化处理量（单位：亿吨）的折线图．\n注：年份代码1﹣7分别对应年份2008﹣2014\n附注：参考数据: $\\sum_{i=1}^{7} y_{i}=9.32, \\sum_{i=1}^{7} t_{i} y_{i}=40.17, \\sqrt{\\sum_{i=1}^{7}\\left(y_{i}-\\bar{y}\\right)^{2}}=0.55, \\sqrt{7} \\approx 2.646\n$\n参考公式:相关系数\n$r=\\frac{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)\\left(y_{i}-\\bar{y}\\right)}{\\sqrt{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)^{2} \\sum_{i=1}^{n}\\left(y_{i}-\\bar{y}\\right)^{2}}}$\n回归方程$\\widehat{y}=\\widehat{a}+\\widehat{b}t$ 中斜率和截距的最小二乘估计公式分别为\n$\\widehat{b}=\\frac{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)\\left(y_{i}-\\bar{y}\\right)}{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)^{2}}, \\widehat{a}=\\bar{y}-\\widehat{b} \\bar{t}$由折线图看出，可用线性回归模型拟合y与t的关系，请用相关系数加以证明建立y关于t的回归方程（系数精确到0.01），预测2016年我国生活垃圾无害化处理量$\\FigureID{3bf63ce4-8af1-11eb-8740-b46bfc50aa29}$$\\FigureID{59bbee9d-8af1-11eb-bea2-b46bfc50aa29}$$\\FigureID{08922940-8b7c-11eb-abff-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "如图，四棱锥$P﹣ABCD$中，$PA\\perp $底面$ABCD$，$AD//BC$，$AB=AD=AC=3$，$PA=BC=4$，M为线段AD上一点，$AM=2MD$，N为PC的中点证明MN$//$平面$PAB$求四面体$N﹣BCM$的体积$\\FigureID{3bf63ce5-8af1-11eb-b89c-b46bfc50aa29}$$\\FigureID{59bbee9e-8af1-11eb-bb3e-b46bfc50aa29}$$\\FigureID{08923158-8b7c-11eb-896f-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知抛物线C：$y^2=2x$的焦点为F，平行于x轴的两条直线$l_1,l_2$分别交C于A，B两点，交C的准线于P，Q两点．若F在线段AB上，R是PQ的中点，证明$AR//FQ$若$\\triangle PQF$的面积是$\\triangle ABF$的面积的两倍，求AB中点的轨迹方程", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=\\ln x-x+1$讨论$f(x)$的单调性证明当 $x \\in(1,+\\infty)$ 时 $, 1<\\frac{x-1}{\\ln x}<x$设$ c>1$，证明当 $x\\in (0,1)$时，$1+ (c-1) x>c^x$", "options": "[]", "type": 4}
-{"stem": "如图，$\\odot O$中$\\widehat{AB}$的中点为P，弦PC，PD分别交AB于E，F两点．若$\\angle PFB=2\\angle PCD$，求$\\angle PCD$ 的大小若EC的垂直平分线与FD的垂直平分线交于点G，证明：$OG\\perp CD$$\\FigureID{3bf66422-8af1-11eb-843b-b46bfc50aa29}$$\\FigureID{59bc15ac-8af1-11eb-98a4-b46bfc50aa29}$$\\FigureID{08923159-8b7c-11eb-bd7b-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，曲线$C_1$的参数方程为$\\left\\{\\begin{array}{l}x=\\sqrt{3} \\cos \\alpha \\ y=\\sin \\alpha\\end{array}\\right.$($ \\alpha$为参数), 以坐标原点为极点，以x轴的正半轴为极轴，建立极坐标系，曲线$C_2$的极坐标方程为$\\rho \\sin \\left(\\theta+\\frac{\\pi}{4}\\right)=2 \\sqrt{2}$写出$C_1$的普通方程和$C_2$的直角坐标方程设点P在$C_1$上，点Q在$C_2$上，求$|PQ|$的最小值及此时P的直角坐标", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=|2 x-a|+a$当$a=2$时，求不等式$f(x)\\le 6$的解集设函数$g(x)=|2 x-1|$ 当 $x \\in R$ 时, $f(x)+g(x) \\geq 3$, 求a的取值范围", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{1，2，3，4\\}，B=\\{2，4，6，8\\}$，则$A\\cap B$中元素的个数为（　　）", "options": "['$1$', '$2$', '$3$', '$4$']", "type": 6}
-{"stem": "复平面内表示复数$z=i(-2+i)$的点位于（　　）", "options": "['第一象限', '第二象限', '第三象限', '第四象限']", "type": 6}
-{"stem": "某城市为了解游客人数的变化规律，提高旅游服务质量，收集并整理了2014年1月至2016年12月期间月接待游客量（单位：万人）的数据，绘制了下面的折线图．根据该折线图，下列结论错误的是（　　）$\\FigureID{3bf66423-8af1-11eb-8ddd-b46bfc50aa29}$$\\FigureID{59bc15ad-8af1-11eb-8e67-b46bfc50aa29}$$\\FigureID{0892315a-8b7c-11eb-b36a-b46bfc50aa29}$", "options": "['月接待游客量逐月增加\\t', '年接待游客量逐年增加', '各年的月接待游客量高峰期大致在7，8月\\t', '各年1月至6月的月接待游客量相对于7月至12月，波动性更小，变化比较平稳']", "type": 6}
-{"stem": "已知$\\sin \\alpha-\\cos \\alpha=\\frac{4}{3}, \\quad$ 则 $\\sin 2 \\alpha$=（　　）", "options": "['$-\\\\frac{7}{9}$', '$-\\\\frac{2}{9}$', '$\\\\frac{2}{9}$', '$\\\\frac{7}{9}$']", "type": 6}
-{"stem": "设x，y满足约束条件$\\left\\{\\begin{array}{l}3 x+2 y-6 \\leq 0 \\ x \\geq 0 \\ y \\geq 0\\end{array}\\right.$ 则$z=x-y$的取值范围是（　　）", "options": "['$[-3,0]$', '$[-3,2]$', '$[0,2]$', '$[0,3]$']", "type": 6}
-{"stem": "函数 $f(x)=\\frac{1}{5} \\sin \\left(x+\\frac{\\pi}{3}\\right)+\\cos \\left(x-\\frac{\\pi}{6}\\right)$ 的最大值为（　　）", "options": "['$\\\\frac{6}{5}$', '$1$', '$\\\\frac{3}{5}$', '$\\\\frac{1}{5}$']", "type": 6}
-{"stem": "函数$y=1+x+\\frac{\\sin x}{x^{2}}$的部分图象大致为（　　）", "options": "['$\\\\LUNAPictureID{3bfde4b0-8af1-11eb-b57d-b46bfc50aa29}$$\\\\LUNAPictureID{59c39702-8af1-11eb-940f-b46bfc50aa29}$$\\\\LUNAPictureID{089837a2-8b7c-11eb-954a-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfde4b1-8af1-11eb-b467-b46bfc50aa29}$$\\\\LUNAPictureID{59c39703-8af1-11eb-9d8d-b46bfc50aa29}$$\\\\LUNAPictureID{089837a3-8b7c-11eb-a948-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfde4b2-8af1-11eb-ba93-b46bfc50aa29}$$\\\\LUNAPictureID{59c39704-8af1-11eb-b0f5-b46bfc50aa29}$$\\\\LUNAPictureID{089837a4-8b7c-11eb-beeb-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfde4b3-8af1-11eb-886e-b46bfc50aa29}$$\\\\LUNAPictureID{59c39705-8af1-11eb-b9a0-b46bfc50aa29}$$\\\\LUNAPictureID{089837a5-8b7c-11eb-b048-b46bfc50aa29}$']", "type": 6}
-{"stem": "执行如图的程序框图，为使输出S的值小于91，则输入的正整数N的最小值为（　　）$\\FigureID{3bf66424-8af1-11eb-bebe-b46bfc50aa29}$$\\FigureID{59bc15ae-8af1-11eb-bb8a-b46bfc50aa29}$$\\FigureID{0892585a-8b7c-11eb-b6f3-b46bfc50aa29}$", "options": "['$5$', '$4$', '$3$', '$2$']", "type": 6}
-{"stem": "已知圆柱的高为1，它的两个底面的圆周在直径为2的同一个球的球面上，则该圆柱的体积为（　　）", "options": "['$\\\\pi$', '$\\\\frac{3\\\\pi}{4}$', '$\\\\frac{\\\\pi}{2}$', '$\\\\frac{\\\\pi}{4}$']", "type": 6}
-{"stem": "在正方体$ABCD-A_1B_1C_1D_1$中，E为棱CD的中点，则（　　）", "options": "['$A_1E\\\\perp DC_1$', '$A_1E\\\\perp BD$', '$A_1E\\\\perp BC_1$', '$A_1E\\\\perp AC$']", "type": 6}
-{"stem": "知椭圆C：$\\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1 \\quad(a>b>0)$的左、右顶点分别为$A_1,A_2$，且以线段$A_1A_2$为直径的圆与直线$bx-ay+2ab=0$相切，则C的离心率为（　　）", "options": "['$\\\\frac{\\\\sqrt{6}}{3}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{\\\\sqrt{2}}{3}$', '$\\\\frac{1}{3}$']", "type": 6}
-{"stem": "已知函数$f(x)=x^{2}-2 x+a\\left(e^{x-1}+e^{-x+1}\\right)$有唯一零点，则a=（　　）", "options": "['$-\\\\frac{1}{2}$', '$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$1$']", "type": 6}
-{"stem": "已知向量$\\vec{a}=(-2,3), \\vec{b}=(3, m)$, 且 $\\vec{a} \\perp \\vec{b}$,则m=_______", "options": "[]", "type": 2}
-{"stem": "双曲线 $\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{9}=1 \\quad(a>0)$的一条渐近线方程为$y=\\frac{3}{5} x$，则a=_______", "options": "[]", "type": 2}
-{"stem": "$\\triangle ABC$的内角A，B，C的对边分别为a，b，c，已知$C=60^{\\circ},  b=\\sqrt{6}, c=3$，则A=_______", "options": "[]", "type": 2}
-{"stem": "设函数$f(x)=\\left\\{\\begin{array}{ll}x+1, & x \\leqslant 0 \\ 2^{x}, & x>0\\end{array}\\right.$ ，则满足$f(x)+f\\left(x-\\frac{1}{2}\\right)>1$的x的取值范围是_______", "options": "[]", "type": 2}
-{"stem": "设数列$\\{a_n\\}$满足$a_{1}+3 a_{2}+\\ldots+(2 n-1) a_{n}=2 n$求$\\{a_n\\}$的通项公式求数列$\\{\\frac{a_n}{2n+1}\\}$的前n项和", "options": "[]", "type": 4}
-{"stem": "某超市计划按月订购一种酸奶，每天进货量相同，进货成本每瓶4元，售价每瓶6元，未售出的酸奶降价处理，以每瓶2元的价格当天全部处理完．根据往年销售经验，每天需求量与当天最高气温（单位：℃）有关．如果最高气温不低于25，需求量为500瓶；如果最高气温位于区间[20，25），需求量为300瓶；如果最高气温低于20，需求量为200瓶．为了确定六月份的订购计划，统计了前三年六月份各天的最高气温数据，得下面的频数分布表：以最高气温位于各区间的频率估计最高气温位于该区间的概率．求六月份这种酸奶一天的需求量不超过300瓶的概率；设六月份一天销售这种酸奶的利润为Y（单位：元），当六月份这种酸奶一天的进货量为450瓶时，写出Y的所有可能值，并估计Y大于零的概率．", "options": "[]", "type": 4}
-{"stem": "如图四面体$ABCD$中，$\\triangle ABC$是正三角形，$AD=CD$证明：$AC\\perp BD$已知$\\triangle ACD$是直角三角形，$AB=BD$，若E为棱BD上与D不重合的点，且$AE\\perp EC$，求四面体$ABCE$与四面体$ACDE$的体积比．$\\FigureID{3bf68b92-8af1-11eb-a781-b46bfc50aa29}$$\\FigureID{59bc3dc2-8af1-11eb-b7a4-b46bfc50aa29}$$\\FigureID{0892585b-8b7c-11eb-8095-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，曲线$y=x^2+mx-2$与$x$轴交于A、B两点，点C的坐标为$(0,1)$，当m变化时，解答下列问题：能否出现$AC\\perp BC$的情况？说明理由证明过A、B、C三点的圆在$y$轴上截得的弦长为定值", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\ln x+a x^{2}+(2 a+1) x$讨论$f(x)$的单调性当$a<0$ 时 $,$ 证明 $f(x) \\leq -\\frac{3}{4 a}-2$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，直线$l_1$的参数方程为$\\left\\{\\begin{array}{l}x=2+t \\ y=k t\\end{array}\\right.$, (t 为参数 )，直线$l_2$的参数方程为$\\left\\{\\begin{array}{l}x=-2+m \\ y=\\frac{m}{k}\\end{array}\\right.$, (m 为参数 )．设$l_1$与$l_2$的交点为P，当k变化时，P的轨迹为曲线C．写出C的普通方程以坐标原点为极点，$x$轴正半轴为极轴建立极坐标系，设$l_{3}: \\rho(\\cos \\theta+\\sin \\theta)-\\sqrt{2}=0$，M为$l_3$与C的交点，求M的极径．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=|x+1|-|x-2|$求不等式$f(x) \\geqslant 1$的解集若不等式$f(x) \\geqslant x^2-x+m$的解集非空，求m的取值范围．", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{x | x-1 \\geq 0\\}$，$\\mathrm{B}=\\{0, \\quad 1, \\quad 2\\}$，则$A \\cap B$=（　　）", "options": "['{0}', '{1}', '{1，2}', '{0，1，2}']", "type": 6}
-{"stem": "$(1+i) \\quad(2-i)$=（　　）", "options": "['﹣3﹣i', '﹣3+i', '3﹣i', '3+i\\t']", "type": 6}
-{"stem": "中国古建筑借助榫卯将木构件连接起来．构件的凸出部分叫榫头，凹进部分叫卯眼，图中木构件右边的小长方体是榫头．若如图摆放的木构件与某一带卯眼的木构件咬合成长方体，则咬合时带卯眼的木构件的俯视图可以是（　　）$\\FigureID{3bf69ade-8af1-11eb-989f-b46bfc50aa29}$$\\FigureID{59bc3dc3-8af1-11eb-8bcd-b46bfc50aa29}$$\\FigureID{08927f92-8b7c-11eb-9d72-b46bfc50aa29}$", "options": "['A$\\\\LUNAPictureID{3bfde4b4-8af1-11eb-94e8-b46bfc50aa29}$$\\\\LUNAPictureID{59c39706-8af1-11eb-97be-b46bfc50aa29}$$\\\\LUNAPictureID{08985e9e-8b7c-11eb-8042-b46bfc50aa29}$', ' B$\\\\LUNAPictureID{3bfde4b5-8af1-11eb-a8e4-b46bfc50aa29}$$\\\\LUNAPictureID{59c39707-8af1-11eb-9f1d-b46bfc50aa29}$$\\\\LUNAPictureID{08985e9f-8b7c-11eb-8018-b46bfc50aa29}$', ' C$\\\\LUNAPictureID{3bfde4b6-8af1-11eb-bbe6-b46bfc50aa29}$$\\\\LUNAPictureID{59c39708-8af1-11eb-b826-b46bfc50aa29}$$\\\\LUNAPictureID{08985ea0-8b7c-11eb-ad6f-b46bfc50aa29}$', ' D$\\\\LUNAPictureID{3bfde4b7-8af1-11eb-9f97-b46bfc50aa29}$$\\\\LUNAPictureID{59c39709-8af1-11eb-bd3b-b46bfc50aa29}$$\\\\LUNAPictureID{08985ea1-8b7c-11eb-ac71-b46bfc50aa29}$']", "type": 6}
-{"stem": "若$\\sin \\alpha={\\frac{1}{3}}$，则$\\cos 2 a$=（　　）", "options": "['$\\\\frac{8}{9}$', '$\\\\frac{7}{9}$', '$-\\\\frac{7}{9}$', '$-\\\\frac{8}{9}$']", "type": 6}
-{"stem": "若某群体中的成员只用现金支付的概率为 0.45，既用现金支付也用非 现金支付的概率为 0.15，则不用现金支付的概率为( )", "options": "['0.3', '0.4', '0.6', '0.7']", "type": 6}
-{"stem": "函数的$f(x)=\\frac{\\tan x}{1+\\tan ^{2} x}$正周期为$\\SIFChoice$", "options": "['$\\\\frac{\\\\pi}{4}$', '$\\\\frac{\\\\pi}{2}$', '$\\\\pi$', '$2 \\\\pi$']", "type": 6}
-{"stem": "下列函数中，其图象与函数 y=lnx 的图象关于直线 x=1 对称的是( )", "options": "['$y=\\\\ln (1-x)$', '$y=\\\\ln (2-x)$', '$y=\\\\ln (1+x)$', '$y=\\\\ln (2+x)$']", "type": 6}
-{"stem": "直线$x+ y+2=0$分别与x轴，y轴交于A，B两点，点P在圆$(x-2)^{2}+y^{2}=2$上，则$\\triangle \\mathrm{ABP}$ 面积的取值范围是( )", "options": "['[2,6]', '[4,8]', '$[\\\\sqrt{2}, 3 \\\\sqrt{2}]$', '$[2 \\\\sqrt{2}, 3 \\\\sqrt{2}]$']", "type": 6}
-{"stem": "函数 $y=-x^{4}+x^{2}+2$ 的图象大致为$\\SIFChoice$", "options": "['A$\\\\LUNAPictureID{3bfde4b8-8af1-11eb-898a-b46bfc50aa29}$$\\\\LUNAPictureID{59c3be06-8af1-11eb-b0ae-b46bfc50aa29}$$\\\\LUNAPictureID{08985ea2-8b7c-11eb-8d58-b46bfc50aa29}$', 'B$\\\\LUNAPictureID{3bfde4b9-8af1-11eb-9bab-b46bfc50aa29}$$\\\\LUNAPictureID{59c3be07-8af1-11eb-be1b-b46bfc50aa29}$$\\\\LUNAPictureID{08985ea3-8b7c-11eb-95c2-b46bfc50aa29}$', 'C$\\\\LUNAPictureID{3bfde4ba-8af1-11eb-b1c7-b46bfc50aa29}$$\\\\LUNAPictureID{59c3be08-8af1-11eb-bb83-b46bfc50aa29}$$\\\\LUNAPictureID{08985ea4-8b7c-11eb-8e5f-b46bfc50aa29}$', 'D$\\\\LUNAPictureID{3bfde4bb-8af1-11eb-be7d-b46bfc50aa29}$$\\\\LUNAPictureID{59c3be09-8af1-11eb-8039-b46bfc50aa29}$$\\\\LUNAPictureID{08985ea5-8b7c-11eb-b067-b46bfc50aa29}$']", "type": 6}
-{"stem": " 已知双曲线 C: $\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, b>0)$的离心率为$\\sqrt{2}$，则点(4,0)到C的渐近线距离为()", "options": "['$\\\\sqrt{2}$', '2', '$\\\\frac{3 \\\\sqrt{2}}{2}$', '$2 \\\\sqrt{2}$']", "type": 6}
-{"stem": "$\\triangle \\mathbf{A B C}$的内角 A，B，C 的对边分别为 a，b，c.若$\\triangle \\mathbf{A B C}$的面积为$\\frac{a^{2}+b^{2}-c^{2}}{4}$，则C=( )", "options": "['$\\\\frac{\\\\pi}{2}$', '$\\\\frac{\\\\pi}{3}$', '$\\\\frac{\\\\pi}{4}$', '$\\\\frac{\\\\pi}{6}$']", "type": 6}
-{"stem": "设 A，B，C，D 是同一个半径为 4 的球的球面上四点，$\\triangle \\mathrm{ABC}$为等边 三角形且面积为$9 \\sqrt{3}$ ，则三棱锥$D-A B C$体积的最大值为( )", "options": "['$12 \\\\sqrt{3}$', '$18\\\\sqrt{3}$', '$24\\\\sqrt{3}$', '$54\\\\sqrt{3}$']", "type": 6}
-{"stem": "已知向量$\\vec{a}=(1,2), \\vec{b}=(2,-2), \\vec{c}=(1, \\lambda)$．若$\\overrightarrow{\\mathrm{c}} / /(2 \\overrightarrow{\\mathrm{a}}+\\overrightarrow{\\mathrm{b}})$，则λ=_____.", "options": "[]", "type": 2}
-{"stem": "某公司有大量客户，且不同年龄段客户对其服务的评价有较大差异．为了解客户的评价，该公司准备进行抽样调查，可供选择的抽样方法有简单随机抽样、分层抽样和系统抽样，则最合适的抽样方法是_____.", "options": "[]", "type": 2}
-{"stem": "若变量x，y满足约束条件$\\left\\{\\begin{array}{l}2 x+y+3 \\geq 0 \\ x-2 y+4 \\geq 0 \\ x-2 \\leq 0\\end{array}\\right.$，则$z=x+\\frac{1}{3} y$的最大值是_____.", "options": "[]", "type": 2}
-{"stem": "已知函数$f(x)=\\ln (\\sqrt{1+x^{2}}-x)+1$，$f(a)=4$，则$f(-a)$=_____．", "options": "[]", "type": 2}
-{"stem": "等比数列$\\left\\{a_{n}\\right\\}$中，$a_{1}=1, \\quad a_{5}=4 a_{3}$．求$\\left\\{a_{n}\\right\\}$的通项公式；记$\\mathrm{S}_{n}$为$\\left\\{a_{n}\\right\\}$的前n项和．若$S_{m}$=63，求m．", "options": "[]", "type": 4}
-{"stem": "某工厂为提高生产效率，开展技术创新活动，提出了完成某项生产任务的两种新的生产方式．为比较两种生产方式的效率，选取40名工人，将他们随机分成两组，每组20人．第一组工人用第一种生产方式，第二组工人用第二种生产方式．根据工人完成生产任务的工作时间（单位：min）绘制了如下茎叶图：根据茎叶图判断哪种生产方式的效率更高？并说明理由；求 40 名工人完成生产任务所需时间的中位数 m，并将完成生产任务所需时\n间超过 m 和不超过 m 的工人数填入下面的列联表:根据（2）中的列联表，能否有99%的把握认为两种生产方式的效率有差异？\n附：$\\mathrm{K}^{2}=\\frac{\\mathrm{n}(\\mathrm{ad}-\\mathrm{bc})^{2}}{(\\mathrm{a}+\\mathrm{b})(\\mathrm{c}+\\mathrm{d})(\\mathrm{a}+\\mathrm{c})(\\mathrm{b}+\\mathrm{d})}$", "options": "[]", "type": 4}
-{"stem": "如图，矩形ABCD所在平面与半圆弧$\\widehat{\\mathrm{CD}}$ 所在平面垂直，M是 $\\widehat{\\mathrm{CD}}$上异于C，D的点．证明：平面AMD⊥平面BMC；在线段AM上是否存在点P，使得$\\mathrm{MC} / /$平面PBD？说明理由．", "options": "[]", "type": 4}
-{"stem": "已知斜率为k的直线l与椭圆C：$\\frac{x^{2}}{4}+\\frac{y^{2}}{3}=1$交于A，B两点，线段AB的中点为M（1，m）（m＞0）．证明：$k<-\\frac{1}{2}$ ；设F为C的右焦点，P为C上一点，且$\\overrightarrow{\\mathrm{FP}}+\\overrightarrow{\\mathrm{FA}}+\\overrightarrow{\\mathrm{FB}}=\\overrightarrow{0}$ ，证明：$2|\\overrightarrow{\\mathrm{FP}}|=|\\overrightarrow{\\mathrm{FA}}|+|\\overrightarrow{\\mathrm{FB}}|$．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\frac{a x^{2}+x-1}{e^{x}}$．求曲线$y=f(x)$在点（0，﹣1）处的切线方程；证明：当$a \\geq 1$时，$f(x)+e \\geq 0$．", "options": "[]", "type": 4}
-{"stem": "在平面直角坐标系xOy中，$\\odot O$的参数方程为$\\left\\{\\begin{array}{l}x=\\cos \\theta \\ y=\\sin \\theta\\end{array}\\right.$ ，（θ为参数），过点$(0,-\\sqrt{2})$且倾斜角为α的直线l与$\\odot O$交于A，B两点．求α的取值范围；求AB中点P的轨迹的参数方程．", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=|2 x+1|+|x-1|$．画出$y=f(x)$的图象；当$x \\in[0,+\\infty)$时，$f(x) \\leqslant a x+b$，求a+b的最小值．$\\FigureID{3bf6c202-8af1-11eb-a134-b46bfc50aa29}$$\\FigureID{59bc64da-8af1-11eb-b302-b46bfc50aa29}$$\\FigureID{0892a680-8b7c-11eb-b945-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{-1,0,1,2\\}$，$B=\\left\\{x | x^{2} \\leq 1\\right\\}$，则$A \\cap B=$", "options": "['$\\\\{-1,0,1\\\\}$', '$\\\\{0,1\\\\}$', '$\\\\{-1,1\\\\}$', '$\\\\{0,1,2\\\\}$']", "type": 6}
-{"stem": "若$z(1+i)=2 i$，则$z$=", "options": "['$-1-i$', '$-1+i$', '$1-i$', '$1+i$']", "type": 6}
-{"stem": "两位男同学和两位女同学随机排成一列，则两位女同学相邻的概率是", "options": "['$\\\\frac{1}{6}$', '$\\\\frac{1}{4}$', '$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$']", "type": 6}
-{"stem": "《西游记》《三国演义》《水浒传》和《红楼梦》是中国古典文学瑰宝，并称为中国古典小说四大名著.某中学为了解本校学生阅读四大名著的情况，随机调查了100学生，其中阅读过《西游记》或《红楼梦》的学生共有90位，阅读过《红楼梦》的学生共有80位，阅读过《西游记》且阅读过《红楼梦》的学生共有60位，则该校阅读过《西游记》的学生人数与该校学生总数比值的估计值为", "options": "['0.5', '0.6', '0.7', '0.8']", "type": 6}
-{"stem": "函数$f(x)=2 \\sin x-\\sin 2 x$在$[0,2 \\pi]$的零点个数为", "options": "['2', '3', '4', '5']", "type": 6}
-{"stem": "已知各项均为正数的等比数列$\\left\\{a_{n}\\right\\}$的前4项和为15，且$a_{5}=3 a_{b}+4 a_{1}$，则$a_{3}=$", "options": "['16', '8', '4', '2']", "type": 6}
-{"stem": "已知曲线$y=a e^{x}+x \\ln x$在点（1，ae）处的切线方程为$y=2 x+b$，则", "options": "['$a=\\\\mathrm{e}, \\\\quad b=-1$', '$a=\\\\mathrm{e}, \\\\quad b=1$', '$a=e^{-1}, \\\\quad b=1$', '$a=e^{-1}, \\\\quad b=-1$']", "type": 6}
-{"stem": "如图，点N为正方形ABCD的中心，△ECD为正三角形，平面ECD⊥平面ABCD，M是线段ED的中点，则$\\FigureID{3bf6c203-8af1-11eb-b2d0-b46bfc50aa29}$$\\FigureID{59bc8c00-8af1-11eb-a40f-b46bfc50aa29}$$\\FigureID{0892c5e8-8b7c-11eb-934a-b46bfc50aa29}$", "options": "['BM=EN，且直线BM、EN 是相交直线', 'BM≠EN，且直线BM，EN 是相交直线', 'BM=EN，且直线BM、EN 是异面直线', 'BM≠EN，且直线BM，EN 是异面直线']", "type": 6}
-{"stem": "执行下边的程序框图，如果输入的$\\varepsilon$为0.01，则输出的值等于$s$$\\FigureID{3bf6c204-8af1-11eb-b7d3-b46bfc50aa29}$$\\FigureID{59bcb514-8af1-11eb-b760-b46bfc50aa29}$$\\FigureID{0892c5e9-8b7c-11eb-80a4-b46bfc50aa29}$", "options": "['$2-\\\\frac{1}{2^{4}}$', '$2-\\\\frac{1}{2^{5}}$', '$2-\\\\frac{1}{2^{6}}$', '$2-\\\\frac{1}{2^{7}}$']", "type": 6}
-{"stem": "已知$F$是双曲线$C: \\frac{x^{2}}{4}-\\frac{y^{2}}{5}=1$的一个焦点，点$P$在$C$上，$O$为坐标原点，若$|O P|=|O F|$，则$\\triangle O P F$的面积为$\\SIFChoice$", "options": "['$\\\\frac{3}{2}$', '$\\\\frac{5}{2}$', '$\\\\frac{7}{2}$', '$\\\\frac{9}{2}$']", "type": 6}
-{"stem": "记不等式组$\\left\\{\\begin{array}{l}x+y . .6 \\ 2 x-y \\geq 0\\end{array}\\right.$表示的平面区域为D.命题$p: \\exists(x, y) \\in D, 2 x+y . .9$；命题$\\forall(x, y) \\in D, 2 x+y, 12$.下面给出了四个命题\n①$p \\vee q$\n②$\\neg p \\vee q$\n③$p \\wedge \\neg q$\n④$\\neg p \\wedge \\neg q$\n这四个命题中，所有真命题的编号是", "options": "['①②', '②③', '③④']", "type": 6}
-{"stem": "设$f(x)$是定义域为R的偶函数，且在$(0,+\\infty)$单调递减，则", "options": "['$f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)>f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)>f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)$', '$f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)>f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)>f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)$', '$f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)>f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)>f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)$', '$f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)>f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)>f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)$']", "type": 6}
-{"stem": "已知向量$\\vec{a}=(2,2), \\vec{b}=(-8,6)$，则$\\cos <\\vec{a}, \\vec{b}>=$$\\SIFBlank$.", "options": "[]", "type": 2}
-{"stem": "记Sn为等差数列$\\left\\{a_{n}\\right\\}$的前n项和，若$a_{3}=5, a_{7}=13$，则$S_{10}=$___________", "options": "[]", "type": 2}
-{"stem": "设$F_{1}, F_{2}$为椭圆$C: \\frac{x^{2}}{36}+\\frac{y^{2}}{20}=1$的两个焦点，$M$为$C$上一点且在第一象限.若$\\Delta M F_{1} F_{2}$为等腰三角形，则$M$的坐标为$\\SIFBlank$.", "options": "[]", "type": 2}
-{"stem": "学生到工厂劳动实践，利用$3 D$打印技术制作模型.如图，该模型为长方体$A B C D-A_{1} B C_{1} D_{1}$挖去四棱锥$O-E F G H$后所得的几何体，其中$O$为长方体的中心，$E, F, G, H$分别为所在棱的中点，$A B=B C=6 \\mathrm{cm}, A A_{1}=4 \\mathrm{cm}$，$3 D$打印所用原料密度为$0.9 g / c m^{3}$，不考虑打印损耗，制作该模型所需原料的质量为$\\SIFBlank$$g$.$\\FigureID{3bf6e914-8af1-11eb-8ecc-b46bfc50aa29}$$\\FigureID{59bcda7e-8af1-11eb-b005-b46bfc50aa29}$$\\FigureID{0892ef3a-8b7c-11eb-bd47-b46bfc50aa29}$", "options": "[]", "type": 2}
-{"stem": "(必考题)为了解甲、乙两种离子在小鼠体内的残留程度，进行如下试验：将200只小鼠随机分成$A, B$两组，每组100只，其中$A$组小鼠给服甲离子溶液，$B$组小鼠给服乙离子溶液.每只小鼠给服的溶液体积相同、摩尔浓度相同.经过一段时间后用某种科学方法测算出残留在小鼠体内离子的百分比.根据试验数据分别得到如下直方图：\n记$C$为事件：“乙离子残留在体内的百分比不低于$5.5$”，根据直方图得到$P(C)$的估计值为$0.70$.求乙离子残留百分比直方图中$a,b$的值；分别估计甲、乙离子残留百分比的平均值（同一组中的数据用该组区间的中点值为代表）.$\\FigureID{3bf6e915-8af1-11eb-81a1-b46bfc50aa29}$$\\FigureID{59bcda7f-8af1-11eb-97d0-b46bfc50aa29}$$\\FigureID{0892ef3b-8b7c-11eb-a4bb-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "(必考题)$\\Delta A B C$的内角$A, B, C$的对边分别为$a, b, c$，已知$a \\sin \\frac{A+C}{2}=b \\sin A$．求$B$；若$\\Delta A B C$为锐角三角形，且$c=1$，求$\\Delta A B C$面积的取值范围．", "options": "[]", "type": 4}
-{"stem": "(必考题)图1是由矩形$A D E B, Rt \\Delta A B C$和菱形$BFGC$组成的一个平面图形，其中$A B=1, B E=B F=2$，$\\angle F B C=60^{\\circ}$，将其沿$A B, B C$折起使得$BE$与$BF$重合，连结$DG$，如图2.证明图2中的四点$A,C,G,D$共面，且平面$A B C \\perp$平面$BCGE$；求图2中的四边形$ACGD$的面积.$\\FigureID{3bf6e916-8af1-11eb-abfa-b46bfc50aa29}$$\\FigureID{59bcda80-8af1-11eb-9b29-b46bfc50aa29}$$\\FigureID{0892ef3c-8b7c-11eb-a7e8-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "(必考题)已知函数$f(x)=2 x^{3}-a x^{2}+2$.讨论$f(x)$的单调性；当$0<a<3$时，记$f(x)$在区间[0,1]的最大值为$M$，最小值为$m$，求$M-m$的取值范围.", "options": "[]", "type": 4}
-{"stem": "(必考题)已知曲线$C: y=\\frac{x^{2}}{2}, D$为直线$y=-\\frac{1}{2}$上的动点，过$D$作$C$的两条切线，切点分别为$A,B$.证明：直线$AB$过定点若以$E\\left(0, \\frac{5}{2}\\right)$为圆心的圆与直线$AB$相切，且切点为线段$AB$的中点，求该圆的方程.", "options": "[]", "type": 4}
-{"stem": "(选修4-4：坐标系与参数方程)如图，在极坐标系$O x$中，$A(2,0)$，$B\\left(\\sqrt{2}, \\frac{\\pi}{4}\\right)$，$C\\left(\\sqrt{2}, \\frac{3 \\pi}{4}\\right)$，$D(2, \\pi)$，弧$\\widehat{A B}$，$\\widehat{B C}$，$\\widehat{C D}$所在圆的圆心分别是(1,0)，$\\left(1, \\frac{\\pi}{2}\\right)$，$(1, \\pi)$，曲线$M_{1}$是弧$\\widehat{A B}$，曲线$M_{2}$是弧$\\widehat{B C}$，曲线$M_{3}$是弧$\\widehat{C D}$.分别写出$M_{1}$，$M_{2}$，$M_{3}$的极坐标方程；曲线$M$由$M_{1}$，$M_{2}$，$M_{3}$构成，若点$P$在$M$上，且$|O P|=\\sqrt{3}$，求$P$极坐标.$\\FigureID{3bf70ff6-8af1-11eb-a8e8-b46bfc50aa29}$$\\FigureID{59bd015a-8af1-11eb-a8b0-b46bfc50aa29}$$\\FigureID{0893166e-8b7c-11eb-895e-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "(选修4-5：不等式选讲)设$x, y, z \\in R$，且$x+y+z=1$.求$(x-1)^{2}+(y+1)^{2}+(z+1)^{2}$的最小值；若$(x-2)^{2}+(y-1)^{2}+(z-a)^{2} \\geq \\frac{1}{3}$成立，证明：$a \\leq-3$或$a \\geq-1$.", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{x |-1<x<2\\}, \\quad B=\\{x | 0<x<3\\},$ 则 $A \\cup B=(\\quad)$", "options": "['(-1,3)', '(-1,0)', '(0,2)', '(2,3)']", "type": 6}
-{"stem": "若为 a 实数，且 $\\frac{2+a i}{1+i}=3+i, \\quad$ 则 $a=(\\quad)$", "options": "['-4', '-3', '3', '4']", "type": 6}
-{"stem": "根据如图给出的2004年至2013年我国二氧化硫年排放量（单位：万吨）柱形图，以下结论中不正确的是（　　）$\\FigureID{3bf71936-8af1-11eb-bf5d-b46bfc50aa29}$$\\FigureID{59bd015b-8af1-11eb-a9be-b46bfc50aa29}$$\\FigureID{0893166f-8b7c-11eb-a390-b46bfc50aa29}$", "options": "['逐年比较，2008年减少二氧化硫排放量的效果最显著', '2007年我国治理二氧化硫排放显现成效', '2006年以来我国二氧化硫年排放量呈减少趋势', '2006年以来我国二氧化硫年排放量与年份正相关']", "type": 6}
-{"stem": "$\\vec{a}=(1,-1), \\vec{b}=(-1,2)$ 则 $(2 \\vec{a}+\\vec{b}) \\cdot \\vec{a}=(\\quad)$", "options": "['-1', '0', '1', '2']", "type": 6}
-{"stem": "已知$S_n$是等差数列 \\{an\\} 的前 n 项和，若 $a_{1}+a_{3}+a_{5}=3,$ 则 $S_{5}=(\\quad)$", "options": "['5', '7', '9', '11']", "type": 6}
-{"stem": "一个正方体被一个平面截去一部分后，剩余部分的三视图如图，则截去部分体积与剩余部分体积的比值为（　　）$\\FigureID{3bf71937-8af1-11eb-9111-b46bfc50aa29}$$\\FigureID{59bd015c-8af1-11eb-a563-b46bfc50aa29}$$\\FigureID{08933d88-8b7c-11eb-a467-b46bfc50aa29}$", "options": "['$\\\\frac{1}{8}$', '$\\\\frac{1}{7}$', '$\\\\frac{1}{6}$', '$\\\\frac{1}{5}$']", "type": 6}
-{"stem": "已知三点 A（1，0）, B（0， $\\sqrt3$）, C（2， $\\sqrt3$）则 $\\triangle$ABC 外接圆的圆心到原点的距离为（　　）", "options": "['$\\\\frac{5}{3}$', '$\\\\frac{\\\\sqrt{21}}{3}$', '$\\\\frac{2 \\\\sqrt{5}}{3}$', '$\\\\frac{4}{3}$']", "type": 6}
-{"stem": "如图程序框图的算法思路源于我国古代数学名著《九章算术》中的“更相减损术”．执行该程序框图，若输入a，b分别为14，18，则输出的a=（　　）$\\FigureID{3bf71938-8af1-11eb-83a6-b46bfc50aa29}$$\\FigureID{59bd015d-8af1-11eb-8d00-b46bfc50aa29}$$\\FigureID{08933d89-8b7c-11eb-8a07-b46bfc50aa29}$", "options": "['0', '2', '4', '14']", "type": 6}
-{"stem": "已知等比数列 $\\left\\{a_{n}\\right\\}$ 满足 $a_{1}=\\frac{1}{4}, \\quad a_{3} a_{5}=4 \\quad\\left(a_{4}-1\\right), \\quad$ 则 $a_{2}=()$", "options": "['2', '1', '$\\\\frac{1}{2}$', '$\\\\frac{1}{8}$']", "type": 6}
-{"stem": "已知 A，B 是球 O 的球面上两点， $\\angle \\mathrm{AOB}=90^{\\circ}$，C为该球面上的动点，若三棱锥 O - ABC 体积的最大值为 36， 则球O的表面积为（）", "options": "['$36 \\\\pi$', '$64 \\\\pi$', '$144 \\\\pi$', '$256 \\\\pi$']", "type": 6}
-{"stem": "如图，长方形 ABCD 的边 AB=2，BC=1，O 是 AB 的中点，点 P沿着边BC，CD 与 DA 运动，记$\\angle BOP=x$. 将动点 P 到 A，B 两点距离之和表示为 x 的函数$f(x)$，则 $y=f(x)$的图象大致为（）$\\FigureID{3bf74066-8af1-11eb-bfc6-b46bfc50aa29}$$\\FigureID{59bd2864-8af1-11eb-85fc-b46bfc50aa29}$$\\FigureID{08933d8a-8b7c-11eb-a460-b46bfc50aa29}$", "options": "['$\\\\LUNAPictureID{3bfe3976-8af1-11eb-8d58-b46bfc50aa29}$$\\\\LUNAPictureID{59c40c36-8af1-11eb-848f-b46bfc50aa29}$$\\\\LUNAPictureID{0898859c-8b7c-11eb-86d7-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfe3977-8af1-11eb-9100-b46bfc50aa29}$$\\\\LUNAPictureID{59c40c37-8af1-11eb-892a-b46bfc50aa29}$$\\\\LUNAPictureID{0898859d-8b7c-11eb-b2b0-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfe3978-8af1-11eb-a4b4-b46bfc50aa29}$$\\\\LUNAPictureID{59c40c38-8af1-11eb-96b0-b46bfc50aa29}$$\\\\LUNAPictureID{0898859e-8b7c-11eb-a139-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfe3979-8af1-11eb-9f12-b46bfc50aa29}$$\\\\LUNAPictureID{59c41328-8af1-11eb-8dba-b46bfc50aa29}$$\\\\LUNAPictureID{0898859f-8b7c-11eb-af56-b46bfc50aa29}$']", "type": 6}
-{"stem": "设函数 $f(x)=\\ln (1+|x|)-\\frac{1}{1+x^{2}},$ 则使得 $f(x)>f(2 x-1)$ 成立的 x 的取值范围是（）", "options": "['$\\\\left(-\\\\infty, \\\\frac{1}{3}\\\\right) \\\\cup(1,+\\\\infty)$', '$\\\\left(\\\\frac{1}{3}, 1\\\\right)$', '$\\\\left(-\\\\frac{1}{3}, \\\\frac{1}{3}\\\\right)$', '$\\\\left(-\\\\infty,-\\\\frac{1}{3},\\\\right) \\\\cup\\\\left(\\\\frac{1}{3},+\\\\infty\\\\right)$']", "type": 6}
-{"stem": "问题：已知函数 $f (x) =ax^3 - 2x$ 的图象过点$(-1，4)$则 a=_______", "options": "[]", "type": 2}
-{"stem": "问题：若 $x, \\quad y$ 满足约束条件 $\\left\\{\\begin{array}{l}x+y-5 \\leqslant 0 \\ 2 x-y-1 \\geqslant 0, \\quad \\text { 则 } z=2 x+y \\text { 的最大值头 } \\ x-2 y+1 \\leqslant 0\\end{array}\\right.$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "问题：已知双曲线过点（4， $\\sqrt3$）且渐近线方程为 y=$\\pm\\frac{1}{2} x,$ 则该双曲线的标准方程是_______", "options": "[]", "type": 2}
-{"stem": "问题：已知曲线 y=x+Inx 在点（1，1）处的切线与曲线 $y=a x^{2}+(a+2) x+1$ 相\n示，则 $a=8$_______", "options": "[]", "type": 2}
-{"stem": "$\\triangle \\mathrm{ABC}$ 中，D 是 BC 上的点，AD 平分 $\\angle \\mathrm{BAC}, \\quad \\mathrm{BD}=2 \\mathrm{DC}$求 $\\frac{\\sin \\angle \\mathrm{B}}{\\sin \\angle \\mathrm{C}}$若 $\\angle \\mathrm{BAC}=60^{\\circ}, \\quad$ 求 $\\angle \\mathrm{B}$", "options": "[]", "type": 4}
-{"stem": "某公司为了解用户对其产品的满意度，从A，B两地区分别随机调查了40个用户，根据用户对产品的满意度评分，得到A地区用户满意度评分的频率分布直方图和B地区用户满意度评分的频数分布表\nB地区用户满意度评分的频数分布表做出B地区用户满意度评分的频率分布直方图，并通过直方图比较两地区满意度评分的平均值及分散程度（不要求计算出具体值，给出结论即可）根据用户满意度评分，将用户的满意度从低到高分为三个不等级：\n估计哪个地区用户的满意度等级为不满意的概率大？说明理由．$\\FigureID{3bf74067-8af1-11eb-9d9b-b46bfc50aa29}$$\\FigureID{59bd2865-8af1-11eb-abe4-b46bfc50aa29}$$\\FigureID{08937400-8b7c-11eb-b0d8-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "如图，长方体ABCD﹣A1B1C1D1中，AB=16，BC=10，AA1=8，点E，F分别在 $\\mathrm{A}_{1} \\mathrm{B}_{1}, \\quad \\mathrm{D}_{1} \\mathrm{C}_{1}$ 上 $, \\quad \\mathrm{A}_{1} \\mathrm{E}=\\mathrm{D}_{1} \\mathrm{F}=4 . \\quad$ 过 $\\mathrm{E}, \\quad$ F 的平亩 $\\alpha$ 与此长方体的面相交交线围成一个正方形在图中画出这个正方形（不必说出画法和理由）求平面 $\\alpha$ 把该长方体分成的两部分体积的比值。$\\FigureID{3bf75c58-8af1-11eb-9cd7-b46bfc50aa29}$$\\FigureID{59bd2866-8af1-11eb-ba2a-b46bfc50aa29}$$\\FigureID{08937401-8b7c-11eb-b959-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "梯圆 $C: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1, \\quad(a>b>0)$ 的离心率 $\\frac{\\sqrt{2}}{2},$ 点（2， $\\sqrt{2}$ ）在 $C$上求椭圆C的方程直线l不过原点O且不平行于坐标轴，l与C有两个交点A，B，线段AB的中点为M．证明：直线OM的斜率与l的斜率的乘积为定值．", "options": "[]", "type": 4}
-{"stem": "设函数 $f (x)=\\ln x+a(1-x)$讨论：$f(x)$的单调性当 $f(x)$有最大值，且最大值大于 2a - 2 时，求 a 的取值范围。", "options": "[]", "type": 4}
-{"stem": "如图，O 为等腰三角形 ABC 内一点，$\\bigodot O$ 与$\\triangle ABC$ 的底边 BC 交于M，N 两点，与底边上的高 AD 交于点 G，且与 AB，AC 分别相切于 E，F 两点。证明: EF // BC 若 AG 等于$\\odot$O 的半径，且AE=MN=$2\\sqrt3$，求四边形 EBCF 的面积。$\\FigureID{3bf75c59-8af1-11eb-af39-b46bfc50aa29}$$\\FigureID{59bd4f8c-8af1-11eb-a7a3-b46bfc50aa29}$$\\FigureID{08937402-8b7c-11eb-9de0-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，曲线$C_1:\\left\\{\\begin{array}{l}x=\\operatorname{tcos} \\alpha \\ y=\\tan \\alpha\\end{array}\\right.$（t 为参数， $t \\neq 0 ）$，其中$0 \\leqslant \\alpha \\leqslant \\pi$，在以O为极点，x轴正半轴为极轴的极坐标系中，曲线$\\mathrm{C}_{2}: \\rho=2 \\sin \\theta$，$\\mathrm{C}_{3}: \\quad \\rho=2 \\sqrt{3} \\cos \\theta$求 $C_1$与 $C_2$交点的直角坐标 若 $C_1$与 $C_2$相交于点 A，$C_{1}$ 与 $C_2$相交于点 B，求|AB|的最大值", "options": "[]", "type": 4}
-{"stem": "设a，b，c，d均为正数，且a+b=c+d，证明：若 $a b>c d, \\quad$ 则 $\\sqrt{a}+\\sqrt{b}>\\sqrt{c}+\\sqrt{d} $$\\sqrt{a}+\\sqrt{b}>\\sqrt{c}+\\sqrt{d}$ 是 $|a-b|<|c-d|$ 的充要条件", "options": "[]", "type": 4}
-{"stem": "已知集合 $\\mathrm{A}=\\{1,2,3\\}, \\mathrm{B}=\\left\\{\\mathrm{x} | \\mathrm{x}^{2}<9\\right\\},$ 则 $\\mathrm{A} \\cap \\mathrm{B}=(\\quad)$", "options": "['${-2,-1,0,1,2,3}$', '${-2,-1,0,1,2}$', '${1,2,3}$', '${1,2}$']", "type": 6}
-{"stem": "设复数z满足$z+i=3﹣i$，则$\\bar{z}=$ （　　）", "options": "['$-1+2i$', '$1﹣2i$', '$3+2i$', '$3﹣2i$']", "type": 6}
-{"stem": "函数 $\\mathrm{y}=\\mathrm{A} \\sin (\\omega \\mathrm{x}+\\phi)$的部分图象如图所示，则$\\FigureID{3bf75c5a-8af1-11eb-8b85-b46bfc50aa29}$$\\FigureID{59bd4f8d-8af1-11eb-ad54-b46bfc50aa29}$$\\FigureID{08939b0a-8b7c-11eb-9940-b46bfc50aa29}$", "options": "['$y=2 \\\\sin \\\\left(2 x-\\\\frac{\\\\pi}{6}\\\\right)$', '$y=2 \\\\sin \\\\left(2 x-\\\\frac{\\\\pi}{3}\\\\right)$', '$y=2 \\\\sin \\\\left(x+\\\\frac{\\\\pi}{6}\\\\right)$', '$y=2 \\\\sin \\\\left(x+\\\\frac{\\\\pi}{3}\\\\right)$']", "type": 6}
-{"stem": "体积为8的正方体的顶点都在同一球面上，则该球面的表面积为（　　）", "options": "['$12 \\\\pi$', '$\\\\frac{32}{3} \\\\pi$', '$8 \\\\pi$', '$4 \\\\pi$']", "type": 6}
-{"stem": "设F为抛物线C：$y^{2}=4 x$的焦点，曲线$y=\\frac{k}{x}(k>0)$与C交于点P，PF $\\perp \\mathbf{x}$ 轴，则k=（　　）", "options": "['$\\\\frac{1}{2}$', '1', '$\\\\frac{3}{2}$', '2']", "type": 6}
-{"stem": "圆$x^{2}+y^{2}-2 x-8 y+13=0$的圆心到直线$a x+y-1=0$的距离为1，则a=（　　）", "options": "['$-\\\\frac{4}{3}$', '$-\\\\frac{3}{4}$', '$\\\\sqrt{3}$', '2']", "type": 6}
-{"stem": "如图是由圆柱与圆锥组合而成的几何体的三视图，则该几何体的表面积为（　　）$\\FigureID{3bf78378-8af1-11eb-84e6-b46bfc50aa29}$$\\FigureID{59bd4f8e-8af1-11eb-888e-b46bfc50aa29}$$\\FigureID{08939b0b-8b7c-11eb-8743-b46bfc50aa29}$", "options": "['$20 \\\\pi$', '$24 \\\\pi$', '$28 \\\\pi$', '$32 \\\\pi$']", "type": 6}
-{"stem": "某路口人行横道的信号灯为红灯和绿灯交替出现，红灯持续时间为40秒．若一名行人来到该路口遇到红灯，则至少需要等待15秒才出现绿灯的概率为（　　）", "options": "['$\\\\frac{7}{10}$', '$\\\\frac{5}{8}$', '$\\\\frac{3}{8}$', '$\\\\frac{3}{10}$']", "type": 6}
-{"stem": "中国古代有计算多项式值的秦九韶算法，如图是实现该算法的程序框图．执行该程序框图，若输入的x=2，n=2，依次输入的a为2，2，5，则输出的s=（　　）$\\FigureID{3bf78379-8af1-11eb-8d60-b46bfc50aa29}$$\\FigureID{59bd767a-8af1-11eb-96ca-b46bfc50aa29}$$\\FigureID{0893b5e4-8b7c-11eb-a153-b46bfc50aa29}$", "options": "['7', '12', '17', '34']", "type": 6}
-{"stem": "下列函数中，其定义域和值域分别与函数$y=10^{\\lg x}$的定义域和值域相同的是（　　）", "options": "['$y=x$', '$y=\\\\lg x$', '$y=2^{x}$', '$y=\\\\frac{1}{\\\\sqrt{x}}$']", "type": 6}
-{"stem": "函数$f(x)=\\cos 2 x+6 \\cos \\left(\\frac{\\pi}{2}-x\\right)$的最大值为（　　）", "options": "['4', '5', '6', '7']", "type": 6}
-{"stem": "已知函数$f(x)(x \\in R)$满足$f(x)=f(2-x)$，若函数$y=\\left|x^{2}-2 x-3\\right|$与$y=f(x)$ 图象的交点为$\\left(\\begin{array}{ll}x_{1}, & y_{1}\\end{array}\\right), \\quad\\left(\\begin{array}{ll}x_{2}, & y_{2}\\end{array}\\right), \\ldots,\\left(x_{m}, y_{m}\\right)$,则$\\sum_{i=1}^{\\pi} x_{i}=$", "options": "['0', 'm', '2m', '4m']", "type": 6}
-{"stem": "已知向量$\\vec{a}=(m, 4)$，$\\vec{b}=(3,-2)$，且$\\overrightarrow{\\mathrm{a}} / / \\overrightarrow{\\mathrm{b}}$，则m=____．", "options": "[]", "type": 2}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x-y+1 \\geq 0 \\ x+y-3 \\geq 0 \\ x-3 \\leq 0\\end{array}\\right.$，则$z=x-2 y$的最小值为_______", "options": "[]", "type": 2}
-{"stem": "$\\Delta$ABC的内角A，B，C的对边分别为a，b，c，若$\\cos A=\\frac{4}{5}$，$\\cos C=\\frac{5}{13}$，a=1，则b=_______", "options": "[]", "type": 2}
-{"stem": "有三张卡片，分别写有1和2，1和3，2和3．甲，乙，丙三人各取走一张卡片，甲看了乙的卡片后说：“我与乙的卡片上相同的数字不是2”，乙看了丙的卡片后说：“我与丙的卡片上相同的数字不是1”，丙说：“我的卡片上的数字之和不是5”，则甲的卡片上的数字是_______", "options": "[]", "type": 2}
-{"stem": "等差数列 $\\left\\{a_{n}\\right\\}$ 中 $, \\quad a_{3}+a_{4}=4, \\quad a_{5}+a_{7}=6$求$\\left\\{a_{n}\\right\\}$自通项公式;设$b_{n}=\\left[a_{n}\\right]$，求数列 $\\left\\{b_{n}\\right\\}$的前 10 项和，其中 [x]表示不超过 x 的最大整数\n如[0.9] $=0, \\quad[2.6]=2$\n", "options": "[]", "type": 4}
-{"stem": "某险种的基本保费为a（单位：元），继续购买该险种的投保人称为续保人，续保人本年度的保费与其上年度出险次数的关联如下：\n随机调查了该险种的200名续保人在一年内的出险情况，得到如下统计表：记A为事件：“一续保人本年度的保费不高于基本保费”．求P（A）的估计值；记B为事件：“一续保人本年度的保费高于基本保费但不高于基本保费的160%”．求P（B）的估计值；求续保人本年度的平均保费估计值．", "options": "[]", "type": 4}
-{"stem": "如图，菱形ABCD的对角线AC与BD交于点O，点E、F分别在AD，CD上，AE=CF，EF交BD于点H，将$\\Delta$DEF沿EF折到$\\Delta$D′EF的位置．证明：$A C \\perp H D^{\\prime}$；若 $A B=5, \\quad A C=6, \\quad A E=\\frac{5}{4}, \\quad O D^{\\prime}=2 \\sqrt{2}, \\quad$ 求五棱雉 $D^{\\prime}-A B C F E$ 体积$\\FigureID{3bf7837a-8af1-11eb-b21e-b46bfc50aa29}$$\\FigureID{59bd767b-8af1-11eb-9d23-b46bfc50aa29}$$\\FigureID{0893b5e5-8b7c-11eb-a9b4-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知函数 f $(x)=(x+1) \\ln x-a(x-1)$ 当 a=4 时，求曲线 $y=f(x)$在$(1，f(1))$处的切线方程;若当$x \\in(1,+\\infty)$ 时, $f(x)>0$，求a的取值范围", "options": "[]", "type": 4}
-{"stem": "已知A是椭圆$E: \\frac{x^{2}}{4}+\\frac{y^{2}}{3}=1$的左顶点，斜率为k（k＞0）的直线交E于A，M两点，点N在E上，$\\mathrm{MA} \\perp \\mathrm{NA}$．当$\\mathrm{AM}|=| \\mathrm{AN}$时，求$\\Delta$AMN的面积当 2 | AM | = |AN |时,证明：$\\sqrt{3}<\\mathrm{k}<2$．", "options": "[]", "type": 4}
-{"stem": "如图，在正方形ABCD中，E，G分别在边DA，DC上（不与端点重合），且DE=DG，过D点作DF $\\perp C E$，垂足为F．证明：B，C，G，F四点共圆；若AB=1，E为DA的中点，求四边形BCGF的面积．$\\FigureID{3bf7aa4a-8af1-11eb-b478-b46bfc50aa29}$$\\FigureID{59bd767c-8af1-11eb-ac0b-b46bfc50aa29}$$\\FigureID{0893dcfa-8b7c-11eb-8f49-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，圆C的方程为$(x+6)^{2}+y^{2}=25$．以坐标原点为极点，x轴正半轴为极轴建立极坐标系，求C的极坐标方程；直线l的参数方程是 $\\left\\{\\begin{array}{l}x=\\operatorname{tcos} \\alpha \\ y=\\operatorname{tsin} \\alpha\\end{array}(t \\text { 为参数 })\\right.$，l与C交与A，B两点，|AB|=$\\sqrt{10}$ ，求l的斜率．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\left|x-\\frac{1}{2}\\right|+\\left|x+\\frac{1}{2}\\right|$，M为不等式$f(x)＜2$的解集．求M；证明：当$a, b \\in M$时，$|a+b|<|1+a b|$．", "options": "[]", "type": 4}
-{"stem": "设集合$A=\\{1,2,3\\}, B=\\{2,3,4\\}$, 则$A \\cup B=(\\quad)$", "options": "['$\\\\{1,2,3,4\\\\}$', '$\\\\{1,2,3\\\\}$', '$\\\\{2,3,4\\\\}$', '$\\\\{1,3,4\\\\}$']", "type": 6}
-{"stem": "$(1+i) (2+i) = ( \\quad) $", "options": "['$1-i$', '$1+3i$', '$3+i$', '$3+3i$']", "type": 6}
-{"stem": "函数$f (x) =sin (2x+\\frac{\\pi}{3})$ 的最小正周期为$(\\quad)$", "options": "['$4\\\\pi$', '$2\\\\pi$', '$\\\\pi$', '$\\\\frac{\\\\pi}{2}$']", "type": 6}
-{"stem": "设非零向量$\\vec{a}$, $\\vec{b}$满足$|\\vec{a}+\\vec{b}|=|\\vec{a}-\\vec{b}|$则$( \\quad)$", "options": "['$\\\\overrightarrow{\\\\mathrm{a}} \\\\perp \\\\overrightarrow{\\\\mathrm{b}}$', '$|\\\\vec{a}|=|\\\\vec{b}|$', '$\\\\overrightarrow{\\\\mathrm{a}} / / \\\\overrightarrow{\\\\mathrm{b}}$', '$|\\\\vec{a}|>|\\\\vec{b}|$']", "type": 6}
-{"stem": "若a＞1，则双曲线$\\frac{x^{2}}{a^{2}}-y^{2}=1$的离心率的取值范围是$( \\quad)$", "options": "['$(\\\\sqrt{2},+\\\\infty)$', '$(\\\\sqrt{2}, 2)$', '$(1, \\\\sqrt{2})$', '(1,2)']", "type": 6}
-{"stem": "如图，网格纸上小正方形的边长为1，粗实线画出的是某几何体的三视图，该几何体由一平面将一圆柱截去一部分后所得，则该几何体的体积为$( \\quad)$$\\FigureID{3bf7aa4b-8af1-11eb-a111-b46bfc50aa29}$$\\FigureID{59bd767d-8af1-11eb-b09b-b46bfc50aa29}$$\\FigureID{0893dcfb-8b7c-11eb-9f3f-b46bfc50aa29}$", "options": "['$90\\\\pi$', '$63\\\\pi$', '$42\\\\pi$', '$36\\\\pi$']", "type": 6}
-{"stem": "设x，y满足约束条件 $\\left\\{\\begin{array}{l}2 x+3 y-3 \\leq 0 \\ 2 x-3 y+3 \\geq 0 \\ y+3 \\geqslant 0\\end{array}\\right.$，则$z=2x+y$的最小值是$( \\quad)$", "options": "['-15', '-9', '1', '9']", "type": 6}
-{"stem": "函数 $f(x)=\\ln \\left(x^{2}-2 x-8\\right)$的单调递增区间是$( \\quad)$", "options": "['$(-\\\\infty,-2)$', '$(-\\\\infty,-1)$', '$(1,+\\\\infty)$', '$(4,+\\\\infty)$']", "type": 6}
-{"stem": "甲、乙、丙、丁四位同学一起去问老师询问成语竞赛的成绩．老师说：你们四人中有2位优秀，2位良好，我现在给甲看乙、丙的成绩，给乙看丙的成绩，给丁看甲的成绩．看后甲对大家说：我还是不知道我的成绩．根据以上信息，则$( \\quad)$", "options": "['乙可以知道四人的成绩', '丁可以知道四人的成绩', '乙、丁可以知道对方的成绩', '乙、丁可以知道自己的成绩']", "type": 6}
-{"stem": "执行如图的程序框图，如果输入的a=﹣1，则输出的S=$( \\quad)$$\\FigureID{3bf7aa4c-8af1-11eb-9204-b46bfc50aa29}$$\\FigureID{59bda558-8af1-11eb-9d08-b46bfc50aa29}$$\\FigureID{0893dcfc-8b7c-11eb-ac3b-b46bfc50aa29}$", "options": "['2', '3', '4', '5']", "type": 6}
-{"stem": "从分别写有1，2，3，4，5的5张卡片中随机抽取1张，放回后再随机抽取1张，则抽得的第一张卡片上的数大于第二张卡片上的数的概率为$( \\quad)$", "options": "['$\\\\frac{1}{10}$', '$\\\\frac{1}{5}$', '$\\\\frac{3}{10}$', '$\\\\frac{2}{5}$']", "type": 6}
-{"stem": "过抛物线C：y^{2}=4 x的焦点F，且斜率为 的直线交C于点M（M在x轴上方），l为C的准线，点N在l上，且$\\mathrm{MN} \\perp l$，则M到直线NF的距离为", "options": "['$\\\\sqrt{5}$', '$2\\\\sqrt{2}$', '$2\\\\sqrt{3}$', '$3\\\\sqrt{3}$']", "type": 6}
-{"stem": "问题：函数$f(x)=2 \\cos x+\\sin x$的最大值为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "问题：已知函数$f(x)$是定义在R上的奇函数，当 $x \\in(-\\infty, 0)$ 时, $f(x)=2 x^{3}+x^{2}$，则$f(2)$=_______", "options": "[]", "type": 2}
-{"stem": "问题：长方体的长、宽、高分别为3，2，1，其顶点都在球O的球面上，则球O的表面积为_______", "options": "[]", "type": 2}
-{"stem": "问题：$\\triangle \\mathrm{ABC}$的内角A，B，C的对边分别为a，b，c，若$2 b \\cos B=a \\cos C+c c \\cos A$，则B=_______", "options": "[]", "type": 2}
-{"stem": "已知等差数列$\\left\\{a_{n}\\right\\}$的前n项和为$\\mathrm{S}_{n}$，等比数列$\\left\\{b_{n}\\right\\}$的前n项和为$\\mathrm{T}_{n}$，$a_{1}=-1$，$b_{1}=1$，$a_{2}+b_{2}=2$．若$a_{3}+b_{3}=5$，求$\\left\\{b_{n}\\right\\}$的通项公式；若 $\\mathrm{T}_{3}=21$ ,求 $\\mathrm{S}_{3}$", "options": "[]", "type": 4}
-{"stem": "如图，四棱锥P﹣ABCD中，侧面PAD为等边三角形且垂直于底面ABCD，$A B=B C=\\frac{1}{2} A D$,$\\angle \\mathrm{BAD}=\\angle \\mathrm{ABC}=90^{\\circ}$.证明：直线BC∥平面PAD；若$\\triangle PCD$面积为 2 $\\sqrt{7}$,求四棱锥P﹣ABCD的体积.$\\FigureID{3bf7d188-8af1-11eb-bee3-b46bfc50aa29}$$\\FigureID{59bda559-8af1-11eb-b2ad-b46bfc50aa29}$$\\FigureID{0894041a-8b7c-11eb-9c1a-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "海水养殖场进行某水产品的新、旧网箱养殖方法的产量对比，收获时各随机抽取了100个网箱，测量各箱水产品的产量（单位：kg），其频率分布直方图如下：记A表示事件“旧养殖法的箱产量低于50kg”，估计A的概率；填写下面列联表，并根据列联表判断是否有99%的把握认为箱产量与养殖方法有关：根据箱产量的频率分布直方图，对两种养殖方法的优劣进行比较．\n附：\n$K^{2}=\\frac{n(a d-b c)^{2}}{(a+b)(c+d)(a+c)(b+d)}$$\\FigureID{3bf7d189-8af1-11eb-af75-b46bfc50aa29}$$\\FigureID{59bda55a-8af1-11eb-bcf2-b46bfc50aa29}$$\\FigureID{0894041b-8b7c-11eb-ac44-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "设O为坐标原点，动点M在椭圆C：$M\\left(x_{0}, y_{0}\\right)$上，过M作x轴的垂线，垂足为 N，点 P 满足 $\\overrightarrow{\\mathrm{NP}}=\\sqrt{2} \\overrightarrow{\\mathrm{NM}}$求点P的轨迹方程;设点Q在直线x=﹣3上，且$\\overrightarrow{\\mathrm{OP}} \\cdot \\overrightarrow{\\mathrm{PQ}}=1$．证明：过点P且垂直于OQ的直线l过C的左焦点F", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=\\left(1-x^{2}\\right) e^{x}$讨论$f(x)$的单调性；当$x \\geqslant 0$时，$f(x) \\leqslant a x+1$，求a的取值范围．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，以坐标原点为极点，x轴的正半轴为极轴建立极坐标系，曲线$C_{1}$的极坐标方程为ρcosθ=4．M为曲线$C_{1}$上的动点，点P在线段OM上，且满足|OM|•|OP|=16，求点P的轨迹$C_{2}$的直角坐标方程；设点A的极坐标为（2，$\\frac{\\pi}{3}$ ），点B在曲线$C_{2}$上，求$\\triangle O A B$面积的最大值．", "options": "[]", "type": 4}
-{"stem": "已知 $a>0, \\quad b>0, \\quad a^{3}+b^{3}=2 . \\quad$ 证明$(a+b)\\left(a^{5}+b^{5}\\right) \\geqslant 4$$a+b \\leq 2$", "options": "[]", "type": 4}
-{"stem": "$i(2+3i)=(\\quad)$", "options": "['$3-2i$', '$3+2i$', '$-3-2i$', '$-3+2i$']", "type": 6}
-{"stem": "已知集合 $A=\\{1,3,5,7\\}, B=\\{2,3,4,5\\}$, 则 $A \\cap B=(\\quad)$", "options": "['$\\\\{3\\\\}$', '$\\\\{5\\\\}$', '$\\\\{3,5\\\\}$', '$\\\\{1,2,3,4,5,7\\\\}$']", "type": 6}
-{"stem": "函数$f(x)=\\frac{e^{x}-e^{-x}}{x^{2}}$的图象大致为$(\\quad)$", "options": "['$\\\\LUNAPictureID{3bfe92a2-8af1-11eb-98e6-b46bfc50aa29}$$\\\\LUNAPictureID{59c43a76-8af1-11eb-b3c9-b46bfc50aa29}$$\\\\LUNAPictureID{089885a0-8b7c-11eb-a5c6-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfe92a3-8af1-11eb-a65a-b46bfc50aa29}$$\\\\LUNAPictureID{59c43a77-8af1-11eb-95f9-b46bfc50aa29}$$\\\\LUNAPictureID{089885a1-8b7c-11eb-82d0-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfe92a4-8af1-11eb-a9c7-b46bfc50aa29}$$\\\\LUNAPictureID{59c43a78-8af1-11eb-9df0-b46bfc50aa29}$$\\\\LUNAPictureID{089885a2-8b7c-11eb-ac28-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfe92a5-8af1-11eb-b936-b46bfc50aa29}$$\\\\LUNAPictureID{59c46178-8af1-11eb-9f78-b46bfc50aa29}$$\\\\LUNAPictureID{089885a3-8b7c-11eb-abe0-b46bfc50aa29}$']", "type": 6}
-{"stem": "已知向量$\\vec{a}, \\vec{b}$ 满足$|\\vec{a}|=1$，$\\vec{a} \\cdot \\vec{b}=-1$，则$\\vec{a} \\cdot(2 \\vec{a}-\\vec{b})=(\\quad)$", "options": "['4', '3', '2', '0']", "type": 6}
-{"stem": "从2名男同学和3名女同学中任选2人参加社区服务，则选中的2人都是女同学的概率为$(\\quad)$", "options": "['0.6', '0.5', '0.4', '0.3']", "type": 6}
-{"stem": "双曲线$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, b>0)$的离心率为 $\\sqrt{3}$，则其渐近线方程为$(\\quad)$", "options": "['$y=\\\\pm \\\\sqrt{2} x$', '$y=\\\\pm \\\\sqrt{3} x$', '$y=\\\\pm \\\\frac{\\\\sqrt{2}}{2} x$', '$y=\\\\pm \\\\frac{\\\\sqrt{3}}{2} x$']", "type": 6}
-{"stem": "在△ABC中，$\\cos \\frac{C}{2}=\\frac{\\sqrt{5}}{5}$ ，BC=1，AC=5，则AB=$(\\quad)$", "options": "['$4 \\\\sqrt{2}$', '$\\\\sqrt{30}$', '$\\\\sqrt{29}$', '$2\\\\sqrt{5}$']", "type": 6}
-{"stem": "为计算$S=1-\\frac{1}{2}+\\frac{1}{3}-\\frac{1}{4}+\\ldots+\\frac{1}{99}-\\frac{1}{100}$ ，设计了如图的程序框图，则在空白框中应填入$(\\quad)$$\\FigureID{3bf7f878-8af1-11eb-9410-b46bfc50aa29}$$\\FigureID{59bdcc94-8af1-11eb-b4e7-b46bfc50aa29}$$\\FigureID{0894041c-8b7c-11eb-b77f-b46bfc50aa29}$", "options": "['$i=i+1$', '$i=i+2$', '$i=i+3$', '$i=i+4$']", "type": 6}
-{"stem": "在正方体$\\mathrm{ABCD}-\\mathrm{A}_{1} \\mathrm{B}_{1} \\mathrm{C}_{1} \\mathrm{D}_{1}$中，$E$为棱$CC_{1}$的中点，则异面直线$AE$与$CD$所成角的正切值为$(\\quad)$", "options": "['$\\\\frac{\\\\sqrt{2}}{2}$', '$\\\\frac{\\\\sqrt{3}}{2}$', '$\\\\frac{\\\\sqrt{5}}{2}$', '$\\\\frac{\\\\sqrt{7}}{2}$']", "type": 6}
-{"stem": "若$f(x)=\\cos x-\\sin x$在$[0，a]$是减函数，则$a$的最大值是$(\\quad)$", "options": "['$\\\\frac{\\\\pi}{4}$', '$\\\\frac{\\\\pi}{2}$', '$\\\\frac{3\\\\pi}{4}$', '$\\\\pi$']", "type": 6}
-{"stem": "已知$\\mathrm{F}_{1}, \\mathrm{F}_{2}$是椭圆C的两个焦点，P是C上的一点，若$\\mathrm{PF}_{1} \\perp \\mathrm{PF}_{2}$，且$\\angle \\mathrm{PF}_{2} \\mathrm{F}_{1}=60^{\\circ}$，则C的离心率为$(\\quad)$", "options": "['$1-\\\\frac{\\\\sqrt{3}}{2}$', '$2-\\\\sqrt{3}$', '$\\\\frac{\\\\sqrt{3}-1}{2}$', '$\\\\sqrt{3}-1$']", "type": 6}
-{"stem": "已知$f(x)$是定义域为$(-\\infty,+\\infty)$的奇函数，满足$f(1-x)=f(1+x)$，若$f(1)=2$，则$f(1)+f(2)+f(3)+\\ldots+f(50)$=$(\\quad)$", "options": "['-50', '0', '2', '50']", "type": 6}
-{"stem": "问题：曲线$y=2 \\ln x$在点(1，0)处的切线方程为_______", "options": "[]", "type": 2}
-{"stem": "问题：若 $x, \\quad y$ 满足约東条件 $\\left\\{\\begin{array}{l}x+2 y-5 \\geqslant 0 \\ x-2 y+3 \\geq 0 \\ x-5 \\leq 0\\end{array}\\right.$，则$z=x+y$的最大值为$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "问题：已知 $\\tan \\left(\\alpha-\\frac{5 \\pi}{4}\\right)=\\frac{1}{5},$ 则 $\\tan \\alpha=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "问题：已知圆锥的顶点为S，母线SA，SB互相垂直，SA与圆锥底面所成角为$30^{\\circ}$．若$\\triangle \\mathrm{SAB}$的面积为8，则该圆锥的体积为_______", "options": "[]", "type": 2}
-{"stem": "记$\\mathrm{S}_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前n项和，已知$a_{1}=-7, \\quad S_{3}=-15$．求$\\left\\{a_{n}\\right\\}$的通项公式；求$\\mathrm{S}_{n}$，并求$\\mathrm{S}_{n}$的最小值．", "options": "[]", "type": 4}
-{"stem": "如图是某地区2000年至2016年环境基础设施投资额y（单位：亿元）的折线图．\n为了预测该地区2018年的环境基础设施投资额，建立了y与时间变量t的两个线性回归模型．根据2000年至2016年的数据（时间变量t的值依次为1，2，…，17）建立模型①：$\\hat{y}=-30.4+13.5 t$;根据2010年至2016年的数据（时间变量t的值依次为1，2，…，7）建立模型②：$\\hat{y}=99+17.5 t$.分别利用这两个模型，求该地区2018年的环境基础设施投资额的预测值；你认为用哪个模型得到的预测值更可靠？并说明理由．$\\FigureID{3bf7f879-8af1-11eb-b2cc-b46bfc50aa29}$$\\FigureID{59bdd79c-8af1-11eb-b208-b46bfc50aa29}$$\\FigureID{08942b28-8b7c-11eb-85ca-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "如图，在三棱锥P﹣ABC中，AB=BC=$2 \\sqrt{2}$ ，PA=PB=PC=AC=4，O为AC的中点．证明：PO$\\perp$平面ABC；若点M在棱BC上，且MC=2MB，求点C到平面POM的距离.$\\FigureID{3bf7f87a-8af1-11eb-aade-b46bfc50aa29}$$\\FigureID{59bdd79d-8af1-11eb-ba72-b46bfc50aa29}$$\\FigureID{0894338c-8b7c-11eb-9a52-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "设抛物线C：$y^{2}=4 x$的焦点为F，过F且斜率为k（k＞0）的直线l与C交于A，B两点，$|AB|=8$求l的方程；求过点A，B且与C的准线相切的圆的方程．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\frac{1}{3} x^{3}-a\\left(x^{2}+x+1\\right)$.若a=3，求$f(x)$的单调区间；证明：$f(x)$只有一个零点．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，曲线C的参数方程为$\\left\\{\\begin{array}{l}x=2 \\cos \\theta \\ y=4 \\sin \\theta\\end{array}\\right.$，（$\\theta\\$为参数），直线l的参数方程为$\\left\\{\\begin{array}{l}x=1+t \\cos \\alpha \\ y=2+t \\sin \\alpha\\end{array}\\right.$ ，（t为参数）．求C和l的直角坐标方程；若曲线C截直线l所得线段的中点坐标为（1，2），求l的斜率．", "options": "[]", "type": 4}
-{"stem": "设函数f（x）=5﹣|x+a|﹣|x﹣2|．当a=1时，求不等式$f(x) \\geqslant 0$的解集；若$f(x) \\leqslant 1$，求a的取值范围．", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{x | x>-1\\}$，$B=\\{x | x<2\\}$，则A∩B=", "options": "['(–1，+∞)', '(–∞，2)', '(–1，2)', '$\\varnothing$']", "type": 6}
-{"stem": "设z=i(2+i)，则$\\bar{z}$=", "options": "['1+2i', '–1+2i', '1–2i', '–1–2i']", "type": 6}
-{"stem": "已知向量a=(2，3)，b=(3，2)，则|a–b|=", "options": "['$\\\\sqrt{2}$', '2', '$5 \\\\sqrt{2}$', '50']", "type": 6}
-{"stem": "生物实验室有5只兔子，其中只有3只测量过某项指标，若从这5只兔子中随机取出3只，则恰有2只测量过该指标的概率为", "options": "['$\\\\frac{2}{3}$', '$\\\\frac{3}{5}$', '$\\\\frac{2}{5}$', '$\\\\frac{1}{5}$']", "type": 6}
-{"stem": "在“一带一路”知识测验后，甲、乙、丙三人对成绩进行预测．\n甲：我的成绩比乙高．\n乙：丙的成绩比我和甲的都高．\n丙：我的成绩比乙高．\n成绩公布后，三人成绩互不相同且只有一个人预测正确，那么三人按成绩由高到低的次序为", "options": "['甲、乙、丙', '乙、甲、丙', '丙、乙、甲', '甲、丙、乙']", "type": 6}
-{"stem": "设f(x)为奇函数，且当x≥0时，$f(x)=\\mathrm{e}^{x}-1$，则当x<0时，f(x)=", "options": "['$e^{-x}-1$', '$e^{-x}+1$', '$-\\\\mathrm{e}^{-x}-1$', '$-\\\\mathrm{e}^{-x}+1$']", "type": 6}
-{"stem": "设α，β为两个平面，则α//β的充要条件是", "options": "['α内有无数条直线与β平行', 'α内有两条相交直线与β平行', 'α，β平行于同一条直线', 'α，β垂直于同一平面']", "type": 6}
-{"stem": "若$x_{1}=\\frac{\\pi}{4}$，$x_{2}=\\frac{3 \\pi}{4}$是函数$f(x)=\\sin \\omega x(\\omega>0)$两个相邻的极值点，则$\\omega$=", "options": "['2', '$\\\\frac{3}{2}$', '1', '$\\\\frac{1}{2}$']", "type": 6}
-{"stem": "若抛物线$y^{2}=2 p x(p>0)$的焦点是椭圆$\\frac{x^{2}}{3 p}+\\frac{y^{2}}{p}=1$的一个焦点，则p=", "options": "['2', '3', '4', '8']", "type": 6}
-{"stem": "曲线y=2sinx+cosx在点(π，–1)处的切线方程为", "options": "['$x-y-\\\\pi-1=0$', '$2 x-y-2 \\\\pi-1=0$', '$2 x+y-2 \\\\pi+1=0$', '$x+y-\\\\pi+1=0$']", "type": 6}
-{"stem": "已知$a \\in\\left(0, \\frac{\\pi}{2}\\right)$，2sin2α=cos2α+1，则sinα=", "options": "['$\\\\frac{1}{5}$', '$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{2 \\\\sqrt{5}}{5}$']", "type": 6}
-{"stem": "设F为双曲线C：$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1$（a>0，b>0）的右焦点，O为坐标原点，以OF为直径的圆与圆$x^{2}+y^{2}=a^{2}$交于P、Q两点．若|PQ|=|OF|，则C的离心率为", "options": "['$\\\\sqrt{2}$', '$\\\\sqrt{3}$', '2', '$\\\\sqrt{5}$']", "type": 6}
-{"stem": "若变量x，y满足约束条件$\\left\\{\\begin{array}{l}2 x+3 y-6 \\geq 0 \\ x+y-3 \\leq 0 \\ y-2 \\leq 0\\end{array}\\right.$则z=3x–y的最大值是________.", "options": "[]", "type": 2}
-{"stem": "我国高铁发展迅速，技术先进．经统计，在经停某站的高铁列车中，有10个车次的正点率为0.97，有20个车次的正点率为0.98，有10个车次的正点率为0.99，则经停该站高铁列车所有车次的平均正点率的估计值为________.", "options": "[]", "type": 2}
-{"stem": "$\\triangle A B C$的内角A，B，C的对边分别为a，b，c.已知bsinA+acosB=0，则B=________.", "options": "[]", "type": 2}
-{"stem": "中国有悠久的金石文化，印信是金石文化的代表之一．印信的形状多为长方体、正方体或圆柱体，但南北朝时期的官员独孤信的印信形状是“半正多面体”（图1）.半正多面体是由两种或两种以上的正多边形围成的多面体.半正多面体体现了数学的对称美．图2是一个棱数为48的半正多面体，它的所有顶点都在同一个正方体的表面上，且此正方体的棱长为1．则该半正多面体共有________个面，其棱长为________．（本题第一空2分，第二空3分．）$\\FigureID{3bf81f9a-8af1-11eb-8253-b46bfc50aa29}$$\\FigureID{59bdfed0-8af1-11eb-9799-b46bfc50aa29}$$\\FigureID{0894338d-8b7c-11eb-9329-b46bfc50aa29}$", "options": "[]", "type": 2}
-{"stem": "如图，长方体ABCD–$A_{1} B_{1} C_{1} D_{1}$的底面ABCD是正方形，点E在棱$A A_{1}$上，$B E \\perp E C_{1}$.（1）证明：BE⊥平面$E B_{1} C_{1}$；（2）若$A E=A_{1} E$，AB=3，求四棱锥$E-B B_{1} C_{1} C$的体积．$\\FigureID{3bf846e2-8af1-11eb-83c4-b46bfc50aa29}$$\\FigureID{59bdfed1-8af1-11eb-9eba-b46bfc50aa29}$$\\FigureID{0894338e-8b7c-11eb-8428-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知$\\left\\{a_{n}\\right\\}$是各项均为正数的等比数列，$a_{1}=2, a_{3}=2 a_{2}+16$.（1）求$\\left\\{a_{n}\\right\\}$的通项公式；（2）设$b_{n}=\\log _{2} a_{n}$，求数列$\\left\\{b_{n}\\right\\}$的前n项和.", "options": "[]", "type": 4}
-{"stem": "某行业主管部门为了解本行业中小企业的生产情况，随机调查了100个企业，得到这些企业第一季度相对于前一年第一季度产值增长率y的频数分布表.（1）分别估计这类企业中产值增长率不低于40%的企业比例、产值负增长的企业比例；（2）求这类企业产值增长率的平均数与标准差的估计值（同一组中的数据用该组区间的中点值为代表）.（精确到0.01）\n附：$\\sqrt{74} \\approx 8.602$.", "options": "[]", "type": 4}
-{"stem": "已知$F_{1}, F_{2}$是椭圆$C: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1(a>b>0)$的两个焦点，P为C上一点，O为坐标原点．（1）若$\\triangle P O F_{2}$为等边三角形，求C的离心率；（2）如果存在点P，使得$P F_{1} \\perp P F_{2}$，且$\\triangle F_{1} P F_{2}$的面积等于16，求b的值和a的取值范围.", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=(x-1) \\ln x-x-1$.证明：（1）$f(x)$存在唯一的极值点；（2）$f(x)=0$有且仅有两个实根，且两个实根互为倒数.", "options": "[]", "type": 4}
-{"stem": "在极坐标系中，O为极点，点$M\\left(\\rho_{0}, \\theta_{0}\\right)\\left(\\rho_{0}>0\\right)$在曲线$C: \\rho=4 \\sin \\theta$上，直线$l$过点$A(4,0)$且与$O M$垂直，垂足为$P$.（1）当$\\theta_{0}=\\frac{\\pi}{3}$时，求$\\rho_{0}$及$l$的极坐标方程；（2）当M在C上运动且P在线段OM上时，求P点轨迹的极坐标方程.", "options": "[]", "type": 4}
-{"stem": "已知$f(x)=|x-a| x+|x-2|(x-a)$.（1）当$a=1$时，求不等式$f(x)<0$的解集；（2）若$x \\in(-\\infty, 1)$时，$f(x)<0$，求$a$的取值范围.", "options": "[]", "type": 4}
-{"stem": "设复数z满足$\\frac{1+z}{1-z}=i$，则$\\vert z\\vert$=（　　）", "options": "['1', '$\\\\sqrt{2}$', '$\\\\sqrt{3}$', '2']", "type": 6}
-{"stem": "$\\sin20^{\\circ}\\cos10^{\\circ}-\\cos160^{\\circ}\\sin10^{\\circ}$=（　　）", "options": "['$-\\\\frac{\\\\sqrt{3}}{2}$', '$\\\\frac{\\\\sqrt{3}}{2}$', '$-\\\\frac{1}{2}$', '$\\\\frac{1}{2}$']", "type": 6}
-{"stem": "设命题$p：\\exists n\\in N，n^2\\gt2^n$，则$\\neg p$为（　　）", "options": "['$\\\\forall n\\\\in N，n^2\\\\gt 2^n$', '$\\\\exists n\\\\in N，n^2\\\\leqslant2^n$', '$\\\\forall n\\\\in N，n^2\\\\leqslant2^n$', '$\\\\exists n\\\\in N，n^2=2^n$']", "type": 6}
-{"stem": "投篮测试中，每人投3次，至少投中2次才能通过测试．已知某同学每次投篮投中的概率为0.6，且各次投篮是否投中相互独立，则该同学通过测试的概率为（　　）", "options": "['0.648', '0.432', '0.36', '0.312']", "type": 6}
-{"stem": "已知$M(x_0，y_0)$是双曲线$C:\\frac{x^2}{2}-y^2=1$上的一点，$F_1$，$F_2$是$C$的左、右两个焦点，若$\\stackrel{\\longrightarrow}{MF_1}\\cdot\\stackrel{\\longrightarrow}{MF_2}\\lt0$，则$y_0$的取值范围是（　　）", "options": "['$(-\\\\frac{\\\\sqrt{3}}{3},\\\\frac{\\\\sqrt{3}}{3})$', '$(-\\\\frac{\\\\sqrt{3}}{6},\\\\frac{\\\\sqrt{3}}{6})$', '$(-\\\\frac{2\\\\sqrt{2}}{3},\\\\frac{2\\\\sqrt{2}}{3})$', '$(-\\\\frac{2\\\\sqrt{3}}{3},\\\\frac{2\\\\sqrt{3}}{3})$']", "type": 6}
-{"stem": "《九章算术》是我国古代内容极为丰富的数学名著，书中有如下问题：”今有委米依垣内角，下周八尺，高五尺．问：积及为米几何？“其意思为：”在屋内墙角处堆放米（如图，米堆为一个圆锥的四分之一），米堆底部的弧长为8尺，米堆的高为5尺，问米堆的体积和堆放的米各为多少？“已知1斛米的体积约为1.62立方尺，圆周率约为3，估算出堆放的米约有（　　）$\\FigureID{3bf8581e-8af1-11eb-a6fd-b46bfc50aa29}$$\\FigureID{59bdfed2-8af1-11eb-9ad5-b46bfc50aa29}$$\\FigureID{08945aa8-8b7c-11eb-84ad-b46bfc50aa29}$", "options": "['14斛', '22斛', '36斛', '66斛']", "type": 6}
-{"stem": "设$D$为$\\triangle ABC$所在平面内一点，$\\stackrel{\\longrightarrow}{BC}=3\\stackrel{\\longrightarrow}{CD}$，则（　　）", "options": "['$\\\\stackrel{\\\\longrightarrow}{AD}=-\\\\frac{1}{3}\\\\stackrel{\\\\longrightarrow}{AB}+\\\\frac{4}{3}\\\\stackrel{\\\\longrightarrow}{AC}$', '$\\\\stackrel{\\\\longrightarrow}{AD}=\\\\frac{1}{3}\\\\stackrel{\\\\longrightarrow}{AB}-\\\\frac{4}{3}\\\\stackrel{\\\\longrightarrow}{AC}$', '$\\\\stackrel{\\\\longrightarrow}{AD}=\\\\frac{4}{3}\\\\stackrel{\\\\longrightarrow}{AB}+\\\\frac{1}{3}\\\\stackrel{\\\\longrightarrow}{AC}$', '$\\\\stackrel{\\\\longrightarrow}{AD}=\\\\frac{4}{3}\\\\stackrel{\\\\longrightarrow}{AB}-\\\\frac{1}{3}\\\\stackrel{\\\\longrightarrow}{AC}$']", "type": 6}
-{"stem": "函数$f(x)=\\cos(\\omega x+\\varphi)$的部分图象如图所示，则$f(x)$的单调递减区间为$\\FigureID{3bf87f2e-8af1-11eb-814c-b46bfc50aa29}$$\\FigureID{59be25b4-8af1-11eb-b204-b46bfc50aa29}$$\\FigureID{08946962-8b7c-11eb-9a17-b46bfc50aa29}$", "options": "['$(k\\\\pi-\\\\frac{1}{4}，k\\\\pi+\\\\frac{3}{4}), k\\\\in z$', '$(2k\\\\pi-\\\\frac{1}{4}， 2k\\\\pi+\\\\frac{3}{4}), k\\\\in z$', '$(k-\\\\frac{1}{4}， k+\\\\frac{3}{4}), k\\\\in z$', '$(2k-\\\\frac{1}{4}， 2k+\\\\frac{3}{4}), k\\\\in z$']", "type": 6}
-{"stem": "执行如图所示的程序框图，如果输入的t=0.01，则输出的n=（　　）$\\FigureID{3bf87f2f-8af1-11eb-9043-b46bfc50aa29}$$\\FigureID{59be25b5-8af1-11eb-b64a-b46bfc50aa29}$$\\FigureID{08946963-8b7c-11eb-af0f-b46bfc50aa29}$", "options": "['5', '6', '7', '8']", "type": 6}
-{"stem": "$(x^2+x+y)^5$的展开式中，$x^5y^2$的系数为（　　）", "options": "['1', '2', '3', '6']", "type": 6}
-{"stem": "圆柱被一个平面截去一部分后与半球（半径为$r$）组成一个几何体，该几何体三视图中的正视图和俯视图如图所示．若该几何体的表面积为$16+20\\pi$，则$r$=（　　）$\\FigureID{3bf8a686-8af1-11eb-978e-b46bfc50aa29}$$\\FigureID{59be25b6-8af1-11eb-ad83-b46bfc50aa29}$$\\FigureID{08946964-8b7c-11eb-87d5-b46bfc50aa29}$", "options": "['1', '2', '4', '8']", "type": 6}
-{"stem": "设函数$f(x)=e^x(2x-1)-ax+a$，其中$a\\lt1$，若存在唯一的整数$x_0$使得$f(x_0)\\lt0$，则$a$的取值范围是（　　）", "options": "['$[-\\\\frac{3}{2e},1)$', '$[-\\\\frac{3}{2e},\\\\frac{3}{4})$', '$[\\\\frac{3}{2e},\\\\frac{3}{4})$', '$[\\\\frac{3}{2e},1)$']", "type": 6}
-{"stem": "若函数$f(x)=x\\ln(x+\\sqrt{a+x^2})$为偶函数，则$a$=______．", "options": "[]", "type": 2}
-{"stem": "一个圆经过椭圆$\\frac{x^2}{16}+\\frac{y^2}{4}=1$的三个顶点．且圆心在$x$轴的正半轴上．则该圆标准方程为____________．", "options": "[]", "type": 2}
-{"stem": "若x，y满足约束条件$\\begin{cases}x-1\\geqslant0\\x-y\\leqslant0\\x+y-4\\leqslant0\\end{cases}$．则$\\frac{y}{x}$的最大值为______．", "options": "[]", "type": 2}
-{"stem": "在平面四边形$ABCD$中，$\\angle A=\\angle B=\\angle C=75^{\\circ}$．$BC=2$，则$AB$的取值范围是____________．", "options": "[]", "type": 2}
-{"stem": "$S_n$为数列$\\{a_n\\}$的前$n$项和，已知$a_n＞0，a_n^2+2a_n=4S_n+3$求${a_n}$的通项公式；设$b_n=\\frac{1}{a_na_{n+1}}$，求数列${b_n}$的前$n$项和．", "options": "[]", "type": 4}
-{"stem": "如图，四边形$ABCD$为菱形，$\\angle ABC=120^{\\circ}$，$E$，$F$是平面$ABCD$同一侧的两点，$BE\\bot$平面$ABCD$，$DF\\bot$平面$ ABCD$，$BE=2DF$，$AE\\bot EC$．证明：平面$AEC\\bot$平面$AFC$；求直线$AE$与直线$CF$所成角的余弦值．$\\FigureID{3bf8a687-8af1-11eb-ad64-b46bfc50aa29}$$\\FigureID{59be4d02-8af1-11eb-8930-b46bfc50aa29}$$\\FigureID{08946965-8b7c-11eb-b578-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "某公司为确定下一年度投入某种产品的宣传费，需了解年宣传费$x$（单位：千元）对年销售量$y$（单位：$t$）和年利润$z$（单位：千元）的影响，对近8年的年宣传费$x_i$和年销售量$y_i（i=1，2，…，8）$数据作了初步处理，得到下面的散点图及一些统计量的值．根据散点图判断，$y=a+bx$与$y=c+d\\sqrt{x}$哪一个适宜作为年销售量$y$关于年宣传费$x$的回归方程类型？（给出判断即可，不必说明理由）；根据（Ⅰ）的判断结果及表中数据，建立$y$关于$x$的回归方程；已知这种产品的年利润$z$与$x$、$y$的关系为$z=0.2y-x$．根据（Ⅱ）的结果回答下列问题：\n（i）年宣传费$x=49$时，年销售量及年利润的预报值是多少？\n（ii）年宣传费$x$为何值时，年利润的预报值最大？\n附：对于一组数据$(u_1 v_1)，(u_2 v_2)…..(u_n v_n)$，其回归线$v=\\alpha+\\beta u$的斜率和截距的最小二乘估计分别为：\n$\\widehat{\\beta}=\\frac{\\sum\\limits_{i=1}^n(u_i-\\bar{u})(v_i-\\bar{v})}{\\sum\\limits_{i=1}^n(u_i-\\bar{u})^2}，\\widehat{\\alpha}=\\bar{v}-\\widehat{\\beta}\\bar{u}$$\\FigureID{3bf8cd5e-8af1-11eb-8747-b46bfc50aa29}$$\\FigureID{59be4d03-8af1-11eb-a865-b46bfc50aa29}$$\\FigureID{08946966-8b7c-11eb-9b92-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，曲线$C：y=\\frac{x^2}{4}$与直线$l：y=kx+a (a＞0)$交于M，N两点．当$k=0$时，分別求$C$在点$M$和$N$处的切线方程；$y$轴上是否存在点$P$，使得当$k$变动时，总有$\\angle OPM=\\angle OPN$？（说明理由）", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=x^{3}+a x+\\frac{1}{4}, g(x)=-\\ln x$当a为何值时，x轴为曲线$y=f(x)$的切线；用min{m，n}表示m，n中的最小值，设函数$h(x)=\\min \\{f(x), g(x)\\}(x\\gt0)$，讨论$h(x)$零点的个数．", "options": "[]", "type": 4}
-{"stem": "如图，$AB$是$\\odot \\mathrm{O}$的直径，$AC$是$\\odot \\mathrm{O}$的切线，$BC$交$\\odot \\mathrm{O}$于点E若$D$为$AC$的中点，证明：DE是$\\odot \\mathrm{O}$的切线；若$OA=\\sqrt{3}CE$，求$\\angle ACB$的大小$\\FigureID{3bf8cd5f-8af1-11eb-93c4-b46bfc50aa29}$$\\FigureID{59be7418-8af1-11eb-a8e4-b46bfc50aa29}$$\\FigureID{089495fa-8b7c-11eb-b855-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，直线$C_1：x=-2$，圆$C_{2}:(x-1)^{2}+(y-2)^{2}=1$，以坐标原点为极点，$x$轴的正半轴为极轴建立极坐标系．求$C_1，C_2$的极坐标方程；若直线$C_3$的极坐标方程为$\\theta=\\frac{\\pi}{4}(\\rho \\in R)$，设$C_2$与$C_3$的交点为$M$，$N$，求$\\triangle C_2MN$的面积", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=|x+1|-2|x-a|, a>0$．当$a=1$时，求不等式$f(x)>1$的解集；若$f(x)$的图象与$x$轴围成的三角形面积大于6，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "设集合A={x|x2﹣4x+3＜0}，B={x|2x﹣3＞0}，则A∩B=（　　）", "options": "['$\\\\left(-3,-\\\\frac{3}{2}\\\\right)$', '$\\\\left(-3, \\\\frac{3}{2}\\\\right)$', '$\\\\left(1, \\\\frac{3}{2}\\\\right)$', '$\\\\left(\\\\frac{3}{2}, 3\\\\right)$']", "type": 6}
-{"stem": "设（1+i） x=1+yi，其中 x，y 是实数，则 $|x+y_i|=$（　　）", "options": "['1', '$\\\\sqrt{2}$', '$\\\\sqrt{3}$', '2']", "type": 6}
-{"stem": "已知等差数列 \\{an 前 9 项的和为 27, a_o=8，则 a $_{100}=$（　　）", "options": "['100', '99', '98', '97']", "type": 6}
-{"stem": "某公司的班车在7：00，8：00，8：30发车，小明在7：50至8：30之间到达发车站乘坐班车，且到达发车站的时刻是随机的，则他等车时间不超过10分钟的概率是（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$', '$\\\\frac{3}{4}$']", "type": 6}
-{"stem": "已知方程$\\frac{x^{2}}{m^{2}+n}-\\frac{y^{2}}{3 m^{2}-n}=1$表示双曲线，且该双曲线两焦点间的距离为4，则n的取值范围是（　　）", "options": "['（﹣1，3）', '$(-1, \\\\sqrt{3})$', '（0，3）', '$(0, \\\\sqrt{3})$']", "type": 6}
-{"stem": "如图，某几何体的三视图是三个半径相等的圆及每个圆中两条相互垂直的半径．若该几何体的体积是$\\frac{28 \\pi}{3}$，则它的表面积是（　　）\n$\\FigureID{3bf8cd60-8af1-11eb-92ce-b46bfc50aa29}$$\\FigureID{59be9af6-8af1-11eb-a4c5-b46bfc50aa29}$$\\FigureID{089495fb-8b7c-11eb-8f57-b46bfc50aa29}$", "options": "['17$\\\\pi$', '18$\\\\pi$', '20$\\\\pi$', '28$\\\\pi$']", "type": 6}
-{"stem": "函数$y=2 x^{2}-e^{|x|}$在[﹣2，2]的图象大致为（　　）", "options": "['$\\\\LUNAPictureID{3bfee0f4-8af1-11eb-af2d-b46bfc50aa29}$$\\\\LUNAPictureID{59c4a96c-8af1-11eb-a840-b46bfc50aa29}$$\\\\LUNAPictureID{08991cba-8b7c-11eb-98a9-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfee0f5-8af1-11eb-b485-b46bfc50aa29}$$\\\\LUNAPictureID{59c4a96d-8af1-11eb-a113-b46bfc50aa29}$$\\\\LUNAPictureID{08991cbb-8b7c-11eb-affd-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfee0f6-8af1-11eb-8bb6-b46bfc50aa29}$$\\\\LUNAPictureID{59c4a96e-8af1-11eb-8c20-b46bfc50aa29}$$\\\\LUNAPictureID{08991cbc-8b7c-11eb-9481-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bfee0f7-8af1-11eb-a188-b46bfc50aa29}$$\\\\LUNAPictureID{59c4a96f-8af1-11eb-859e-b46bfc50aa29}$$\\\\LUNAPictureID{08991cbd-8b7c-11eb-94c1-b46bfc50aa29}$']", "type": 6}
-{"stem": "若a＞b＞1，0＜c＜1，则（　　）", "options": "['$a^{c}<b^{c}$', '$a b^{c}<b a^{c}$', '$a \\\\log _{b} c<b \\\\log _{a} c$', '$\\\\log _{a} c<\\\\log _{b} c$']", "type": 6}
-{"stem": "执行下面的程序框图，如果输入的x=0，y=1，n=1，则输出x，y的值满足（　　）$\\FigureID{3bf8f464-8af1-11eb-85cf-b46bfc50aa29}$$\\FigureID{59bec21e-8af1-11eb-b554-b46bfc50aa29}$$\\FigureID{089495fc-8b7c-11eb-92e2-b46bfc50aa29}$", "options": "['y=2x', 'y=3x', 'y=4x', 'y=5x']", "type": 6}
-{"stem": "以抛物线C的顶点为圆心的圆交C于A、B两点，交C的准线于D、E两点．已知$|A B|=4 \\sqrt{2}, \\quad|D E|=2 \\sqrt{5}$，则C的焦点到准线的距离为（　　）", "options": "['2', '4', '6', '8']", "type": 6}
-{"stem": "$平面\\alpha过正方体A B C D-A_{1} B_{1} C_{1} D_{1}的顶点 A,\\alpha / / \\text { 平面 } \\mathrm{CB}_{1} \\mathrm{D}_{1}, \\alpha\\cap平面 ABCD=m，\n\\alpha ก平面 ABB $ $_{1} \\mathrm{A}_{1}=\\mathrm{n},$ 则 $\\mathrm{m}, \\mathrm{n}$ 所成角的正弦值为$\\SIFChoice$", "options": "['$\\\\frac{\\\\sqrt{3}}{2}$', '$\\\\frac{\\\\sqrt{2}}{2}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{1}{3}$']", "type": 6}
-{"stem": "已知函数$f(x)=\\sin (\\omega x+\\phi)\\left(\\omega>0, \\quad|\\phi| \\leqslant \\frac{\\pi}{2}\\right), \\quad x=-\\frac{\\pi}{4}$为$f(x)$的零点，$\\mathrm{x}=\\frac{\\pi}{4}$ 为 $\\mathrm{y}=\\mathrm{f}(\\mathrm{x})$ 图象的对称轴，且 $\\mathrm{f}(\\mathrm{x})$ 在 $\\left(\\frac{\\pi}{18}, \\frac{5 \\pi}{36}\\right)$上单调，则$\\omega$的最大值为（　　）", "options": "['11', '9', '7', '5']", "type": 6}
-{"stem": "设向量 $\\vec{a}=(m, 1), \\vec{b}=(1,2), \\quad$ 日 $|\\vec{a}+\\vec{b}|^{2}=|\\vec{a}|^{2}+|\\vec{b}|^{2},$ 则 $m=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "$(2 x+\\sqrt{x})^{5}$的展开式中， $\\mathrm{x}^{3}$ 的系数是$\\SIFBlank$．（用数字填写答案）", "options": "[]", "type": 2}
-{"stem": "设等比数列${a_n}$满足$a_1+a_3=10，a_2+a_4=5，则a_1a_2…a_n$的最大值为$\\SIFBlank$．", "options": "[]", "type": 2}
-{"stem": "某高科技企业生产产品A和产品B需要甲、乙两种新型材料．生产一件产品A需要甲材料1.5kg，乙材料1kg，用5个工时；生产一件产品B需要甲材料0.5kg，乙材料0.3kg，用3个工时，生产一件产品A的利润为2100元，生产一件产品B的利润为900元．该企业现有甲材料150kg，乙材料90kg，则在不超过600个工时的条件下，生产产品A、产品B的利润之和的最大值为_______元．", "options": "[]", "type": 2}
-{"stem": "△ABC的内角A，B，C的对边分别为a，b，c，已知2cosC（acosB+bcosA）=c．求C；若 $\\mathrm{c}=\\sqrt{7}, \\quad \\triangle \\mathrm{ABC}$ 的面积为 $\\frac{3 \\sqrt{3}}{2},$ 求 $\\triangle \\mathrm{ABC}$ 的周长", "options": "[]", "type": 4}
-{"stem": "如图，在以A，B，C，D，E，F为顶点的五面体中，面ABEF为正方形，AF=2FD，$\\angle \\mathrm{AFD}=90^{\\circ}$，且二面角D﹣AF﹣E与二面角C﹣BE﹣F都是$60^{\\circ}$．证明平面ABEF$\\perp$平面EFDC；求二面角E﹣BC﹣A的余弦值．", "options": "[]", "type": 4}
-{"stem": "某公司计划购买2台机器，该种机器使用三年后即被淘汰．机器有一易损零件，在购进机器时，可以额外购买这种零件作为备件，每个200元．在机器使用期间，如果备件不足再购买，则每个500元．现需决策在购买机器时应同时购买几个易损零件，为此搜集并整理了100台这种机器在三年使用期内更换的易损零件数，得如图柱状图：\n以这100台机器更换的易损零件数的频率代替1台机器更换的易损零件数发生的概率，记X表示2台机器三年内共需更换的易损零件数，n表示购买2台机器的同时购买的易损零件数．求X的分布列；若要求P（X≤n）≥0.5，确定n的最小值；以购买易损零件所需费用的期望值为决策依据，在n=19与n=20之中选其一，应选用哪个？$\\FigureID{3bf8f465-8af1-11eb-b1da-b46bfc50aa29}$$\\FigureID{59bee922-8af1-11eb-b823-b46bfc50aa29}$$\\FigureID{0894bf90-8b7c-11eb-9a65-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "设圆 x^+y^+2x-15=0 的圆心为 A，直线l过点 B（1，0）且与 x 轴不\n重合，l交圆 A 于 C， D 两点，过 B 作 AC的平行线交 AD 于点 E.证明|EA |+|EB|为定值，并写出点 E 的轨迹方程;设点 E 的轨迹为曲线 C $_{1},$ 直线।交 C $_{1}$ 于 M， N 两点，过 B 且与 I 垂直的直线与圆 A 交于 P, Q两点，求四边形 MPNQ 面积的取值范围。", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=(x-2) e^{x+a}(x-1)^{2}$有两个零点．求a的取值范围；设 $\\mathrm{x}_{1}, \\quad \\mathrm{x}_{2}$ 是 $\\mathrm{f}(\\mathrm{x})$ 的两个零点，证明: $\\mathrm{x}_{1}+\\mathrm{x}_{2}<2$．", "options": "[]", "type": 4}
-{"stem": "如图， $\\triangle \\mathrm{OAB}$ 是等腰三角形， $\\angle \\mathrm{AOB}=120^{\\circ} .$ 以 0 为圆心 $, \\frac{1}{2} \\mathrm{OA}$ 为半径作圆．证明：直线 AB 与 $\\odot$ O 相切；点 C，D 在 $\\odot$ O上, 且. A, B，C，D 四点共圆，证明: AB//CD.$\\FigureID{3bf91700-8af1-11eb-bed2-b46bfc50aa29}$$\\FigureID{59bee923-8af1-11eb-ae32-b46bfc50aa29}$$\\FigureID{0894bf91-8b7c-11eb-b6a3-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系 xOy 中，曲线 C $_{1}$ 的参数方程为 $\\left\\{\\begin{array}{l}\\mathrm{x}=\\mathrm{acost} \\quad( \\mathrm{t} \\text { 为参数 }, \\mathrm{a}>0) . \\text { 在 } \\ \\mathrm{y}=1+\\mathrm{asint}\\end{array}\\right.$\n以坐标原点为极点， x 轴正半轴为极轴的极坐标系中，曲线 $C_{2}$: $\\rho=4 \\cos \\theta$说明 $C_{1}$是哪种曲线，并将 $C_{1}$的方程化为极坐标方程;直线 $C_{3}$的极坐标方程为$\\theta=\\alpha_{0},$ 其中 $\\alpha_{0}$ 满足 $\\tan \\alpha_{0}=2$，若曲线 $C_{1}$与 $C_{2}$的公共点都在 $C_{3}$上，求 a.", "options": "[]", "type": 4}
-{"stem": "已知函数 f $(x)=|x+1|-|2 x-3|$在图中画出 y=f（x）的图象;求不等式|f（x）|>1 的解集。$\\FigureID{3bf91701-8af1-11eb-9b92-b46bfc50aa29}$$\\FigureID{59bee924-8af1-11eb-8a7a-b46bfc50aa29}$$\\FigureID{0894bf92-8b7c-11eb-a98a-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知集合 $A=\\{x | x<1\\}, \\quad B=\\left\\{x | 3^{x}<1\\right\\}, \\quad$ 则$\\quad |$$\\SIFChoice$", "options": "['$A \\\\cap B=\\\\{x | x<0\\\\}$', '$A \\\\cup B=R$', '$A \\\\cup B=\\\\{x | x>1\\\\}$', '$A \\\\cap B=\\\\varnothing$']", "type": 6}
-{"stem": "如图，正方形ABCD内的图形来自中国古代的太极图．正方形内切圆中的黑色部分和白色部分关于正方形的中心成中心对称．在正方形内随机取一点，则此点取自黑色部分的概率是（　　）$\\FigureID{3bf91702-8af1-11eb-9f00-b46bfc50aa29}$$\\FigureID{59bf105a-8af1-11eb-99dc-b46bfc50aa29}$$\\FigureID{0894e6d0-8b7c-11eb-9eb5-b46bfc50aa29}$", "options": "['$\\\\frac{1}{4}$', '$\\\\frac{\\\\pi}{8}$', '$\\\\frac{1}{2}$', '$\\\\frac{\\\\pi}{4}$']", "type": 6}
-{"stem": "设有下面四个命题\n$\\mathrm{p}_{1}:$ 若复数 $\\mathrm{z}$ 满足 $\\frac{1}{\\mathrm{z}} \\in \\mathrm{R},$ 则 $\\mathrm{z} \\in \\mathrm{R}$,\n$\\mathrm{p}_{2}:$ 若复数 z 满足 z $^{2} \\in \\mathrm{R},$ 则 $_{\\mathrm{z}} \\in \\mathrm{R}_{\\text {; }}$,\n$\\mathrm{p}_{3}:$ 若复数 $\\mathrm{z}_{1}, \\quad \\mathrm{z}_{2}$ 满足 $\\mathrm{z}_{12} \\in \\mathrm{E}, \\quad$ 则 $\\mathrm{z}_{1}=\\overline{\\mathrm{z}_{2}}$，\n$p_{4}: $ 若复数 $z \\in R, \\quad$ 则 $\\bar{z} \\in R$.\n其中的真命题为（　　）", "options": "['$p_{1}, p_{3}$', '$p_{1}, p_{4}$', '$p_{2}, p_{3}$', '$p_{2}, p_{4}$']", "type": 6}
-{"stem": "记 Sn为等差数列{an} 的前 n 项和。若 a $_{4}+a_{5}=24, \\quad S_{6}=48,$ 则 $\\left\\{a_{n}\\right\\}$ 的公差", "options": "['1', '2', '4', '8']", "type": 6}
-{"stem": "函数f（x）在$(-\\infty,+\\infty)$单调递减，且为奇函数．若f（1）=﹣1，则满足$-1 \\leqslant f(x-2) \\leqslant 1$1的x的取值范围是（　　）", "options": "['[﹣2，2]', '[﹣1，1]', '[0，4]', '[1，3]']", "type": 6}
-{"stem": "$\\left(1+\\frac{1}{x^{2}}\\right)(1+x)^{6}$展开式中$x^{2}$的系数为（　　）", "options": "{'1': '5', '2': '0', '3': '5'}", "type": 6}
-{"stem": "某多面体的三视图如图所示，其中正视图和左视图都由正方形和等腰直角三角形组成，正方形的边长为2，俯视图为等腰直角三角形，该多面体的各个面中有若干个是梯形，这些梯形的面积之和为（　　）$\\FigureID{3bf91703-8af1-11eb-9099-b46bfc50aa29}$$\\FigureID{59bf375c-8af1-11eb-8f99-b46bfc50aa29}$$\\FigureID{0894e6d1-8b7c-11eb-85c7-b46bfc50aa29}$", "options": "['10', '12', '14', '16']", "type": 6}
-{"stem": "如图程序框图是为了求出满足$3^{n}-2^{n}>1000$的最小偶数n，那么在菱形和矩形两个空白框中，可以分别填入$\\FigureID{3bf93e4a-8af1-11eb-ae13-b46bfc50aa29}$$\\FigureID{59bf375d-8af1-11eb-8e2e-b46bfc50aa29}$$\\FigureID{0894e6d2-8b7c-11eb-8478-b46bfc50aa29}$", "options": "['A＞1000和n=n+1', 'A＞1000和n=n+2', 'A≤1000和n=n+1', 'A≤1000和n=n+2']", "type": 6}
-{"stem": "已知曲线C1：$y=\\cos x, \\quad C_{2}: y=\\sin \\left(2 x+\\frac{2 \\pi}{3}\\right)$，则下面结论正确的是（　　）", "options": "['把C1上各点的横坐标伸长到原来的2倍，纵坐标不变，再把得到的曲线向右平移$\\\\frac{\\\\pi}{6}$个单位长度，得到曲线C2', '把C1上各点的横坐标伸长到原来的2倍，纵坐标不变，再把得到的曲线向左平移$\\\\frac{\\\\pi}{12}$个单位长度，得到曲线C2', '把C1上各点的横坐标缩短到原来的$\\\\frac{1}{2}$倍，纵坐标不变，再把得到的曲线向右平移$\\\\frac{\\\\pi}{6}$个单位长度，得到曲线C2\\t', '把C1上各点的横坐标缩短到原来的$\\\\frac{1}{2}$倍，纵坐标不变，再把得到的曲线向左平移$\\\\frac{\\\\pi}{12}$个单位长度，得到曲线C2\\t']", "type": 6}
-{"stem": "已知F为抛物线C：$y^{2}=4 x$的焦点，过F作两条互相垂直的直线l1，l2，直线l1与C交于A、B两点，直线l2与C交于D、E两点，则|AB|+|DE|的最小值为（　　）", "options": "['0']", "type": 6}
-{"stem": "设x、y、z为正数，且$2^{x}=3^{y}=5^{z}$，则（　　）", "options": "['2x＜3y＜5z', '5z＜2x＜3y', '3y＜5z＜2x', '3y＜2x＜5z']", "type": 6}
-{"stem": "几位大学生响应国家的创业号召，开发了一款应用软件．为激发大家学习数学的兴趣，他们推出了“解数学题获取软件激活码”的活动．这款软件的激活码为下面数学问题的答案：已知数列1，1，2，1，2，4，1，2，4，8，1，2，4，8，16，…，其中第一项是$2^{0}$，接下来的两项是$2^{0}, 2^{1}$，再接下来的三项是$2^{0}, 2^{1}, 2^{2}$,依此类推．求满足如下条件的最小整数N：N＞100且该数列的前N项和为2的整数幂．那么该款软件的激活码是（　　）", "options": "['440', '330', '220', '110']", "type": 6}
-{"stem": "已知向量$\\vec{a}, \\vec{b}$的夹角为 $60^{\\circ}, \\quad|\\vec{a}|=2, \\quad|\\vec{b}|=1$,则 $ | \\vec{a}+2 \\vec{b} |$=_______.", "options": "[]", "type": 2}
-{"stem": "设x，y满足约束条件$\\left\\{\\begin{array}{l}x+2 y \\leq 1 \\ 2 x+y \\geqslant-1 \\ x-y \\leqslant 0\\end{array}\\right.$，则z=3x﹣2y的最小值为_______.", "options": "[]", "type": 2}
-{"stem": "已知叉曲线 $C: \\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, \\quad b>0)$ 的右顶点为 $A, \\quad$ 以 $A$ 为圆\n心，b 为半径作圆 A，圆 A 与双曲线 C 的一条渐近线交于 M、N 两点。若$\\angle \\mathrm{MAN}=60^{\\circ}$则 $\\mathrm{C}$ 的离心率为_______.", "options": "[]", "type": 2}
-{"stem": "如图，圆形纸片的圆心为 O，半径为 5cm，该纸片上的等边三角形ABC 的中心为 O。 D、E、F 为圆 O 上的点， $\\triangle$DBC， AECA， AFAB 分别是以BC，CA，AB 为底边的等腰三角形。沿虚线剪开后，分别以 BC，CA，AB 为折痕折起 $\\triangle \\mathrm{DBC}, \\quad \\triangle \\mathrm{ECA}, \\quad \\triangle \\mathrm{FAB}, \\quad$ 使得 $\\mathrm{D}$ 、E、F 重合，得到三棱雉. $\\quad$ 当 $\\triangle \\mathrm{ABC}$的边长变化时，所得三棱雉体积（单位：$cm^3$）的最大值为_______$\\FigureID{3bf93e4b-8af1-11eb-aaa7-b46bfc50aa29}$$\\FigureID{59bf5e62-8af1-11eb-b6a3-b46bfc50aa29}$$\\FigureID{08950dca-8b7c-11eb-9e19-b46bfc50aa29}$", "options": "[]", "type": 2}
-{"stem": "$\\triangle$ABC 的内角 A， B， C的对边分别少 a，b，c，已知$\\triangle$ABC的面积为$\\frac{a^{2}}{3 \\sin A}$.求 $\\sin B \\sin C$；若 6cosBcosC=1， a=3，求人ABC的周长。", "options": "[]", "type": 4}
-{"stem": "如图，在四棱雉 P-ABCD 中，AB//CD，且 $\\angle B A P=\\angle C D P=90^{\\circ}$证明: 平面 PAB$\\perp$平面 PAD;若 PA=PD=AB=DC， $\\angle \\mathrm{APD}=90^{\\circ}$，求二面角 A - PB - C的余弦值．$\\FigureID{3bf9655e-8af1-11eb-a32c-b46bfc50aa29}$$\\FigureID{59bf5e63-8af1-11eb-80b6-b46bfc50aa29}$$\\FigureID{08950dcb-8b7c-11eb-a160-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "为了监控某种零件的一条生产线的生产过程，检验员每天从该生产线上随机抽取16个零件，并测量其尺寸（单位：cm）．根据长期生产经验，可以认为这条生产线正常状态下生产的零件的尺寸服从正态分布N（μ，σ2）．\n（1）假设生产状态正常，记X表示一天内抽取的16个零件中其尺寸在（μ﹣3σ，μ+3σ）之外的零件数，求P（X≥1）及X的数学期望；\n（2）一天内抽检零件中，如果出现了尺寸在（μ﹣3σ，μ+3σ）之外的零件，就认为这条生产线在这一天的生产过程可能出现了异常情况，需对当天的生产过程进行检查．试说明上述监控生产过程方法的合理性；下面是检验员在一天内抽取的16个零件的尺寸：\n经计算得 $\\bar{x}=\\frac{1}{16} \\sum_{i=1}^{16} x_{i}=9.97, \\quad s=\\sqrt{\\frac{1}{16} \\sum_{i=1}^{16}\\left(x_{i}-\\bar{x}\\right)^{2}}=\\sqrt{\\frac{1}{16}\\left(\\sum_{i=1}^{16} x_{i}^{2}-16 \\bar{x}^{2}\\right)} \\approx 0.212$\n其中 $x_{i}$为抽取的第 i 个零件的尺寸， i=1，2，..., 16.\n用样本平均数x作为$\\mu$的估计值 $\\mu$ ，用样本标准差 s 作为$\\sigma$的估计值 $\\sigma$ ，利用估计值判断是否需对当天的生产过程进行检查？易除（ $\\mu-3 \\sigma, \\mu+3 \\sigma)$ 之外的数据，用剩下的数据估计\\mu和\\sigma（精确到 0.01）。\n附：若随机变量 Z 服从正态分布 $\\mathrm{N}\\left(\\mu, \\sigma^{2}\\right),$ 则 $\\mathrm{P}(\\mu-3 \\sigma<\\mathrm{Z}<\\mu+3 \\sigma)=0.9974$\n$0.9974^{16} \\approx 0.9592, \\quad \\sqrt{0.008} \\approx 0.09$", "options": "[]", "type": 4}
-{"stem": "已知椭圆 $C: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1 \\quad(a>b>0), \\quad \\mathbb{四点 ~} P_{1}(1,1), P_{2}(0,1)$$P_{3}\\left(-1, \\frac{\\sqrt{3}}{2}\\right), \\quad P_{4}\\left(1, \\frac{\\sqrt{3}}{2}\\right)$ 中恰有三点在椭圆C上求 C的方程;设直线।不经过 P_点且与 C 相交于 A，B 两点。若直线 P_A 与直线 P_B 的斜率的和为 - 1，证明: | 过定点。", "options": "[]", "type": 4}
-{"stem": "已知函数 f (x) =ae^2x+ (a-2) e^{x - x. }讨论f（x）的单调性；若f（x）有两个零点，求a的取值范围．", "options": "[]", "type": 4}
-{"stem": "在直角坐惊系 xOy 中，曲线 C的参数方程为 $\\left\\{\\begin{array}{l}x=3 \\cos \\theta \\ y=\\sin \\theta\\end{array},(\\theta \\text { 为参数 })\\right.$\n直线 I 的参数方程为 $\\left\\{\\begin{array}{l}\\mathrm{x}=\\mathrm{a}+4 \\mathrm{t} \\ \\mathrm{y}=1-\\mathrm{t}\\end{array}, \\quad(\\mathrm{t} \\text { 为参数 })\\right.$若 a= - 1， 求 C与I的交点坐标;若C 上的点到|距离的最大值少$\\sqrt17$，求 a", "options": "[]", "type": 4}
-{"stem": "已知函数 f $(x)=-x^{2}+a x+4, g(x)=|x+1|+|x-1|$当 a=1 时，求不等式 $f(x) \\geqslant g(x)$的解集;若不等式$f(x) \\geqslant g(x)$的解集包含[-1，1]，求 a 的取值范围。", "options": "[]", "type": 4}
-{"stem": "设$z=\\frac{1-i}{1+i}+2 i$，则$|z|$=（　　）", "options": "['0', '$\\\\frac{1}{2}$', '1', '$\\\\sqrt{2}$']", "type": 6}
-{"stem": "已知集合$A=\\left\\{x | x^{2}-x-2>0\\right\\}$，则$\\left[_{R} A\\right.$=（　　）", "options": "['$\\\\{x |-1<x<2\\\\}$', '$\\\\{x |-1 \\\\leqslant x \\\\leqslant 2\\\\}$', '$\\\\{x | x<-1\\\\} \\\\cup\\\\{x | x>2\\\\}$', '$\\\\{x | x \\\\leqslant-1\\\\} \\\\cup\\\\{x | x \\\\geqslant 2\\\\}$']", "type": 6}
-{"stem": "某地区经过一年的新农村建设，农村的经济收入增加了一倍，实现翻番．为更好地了解该地区农村的经济收入变化情况，统计了该地区新农村建设前后农村的经济收入构成比例，得到如下饼图，则下面结论中不正确的是（　　）$\\FigureID{3bf9655f-8af1-11eb-aae6-b46bfc50aa29}$$\\FigureID{59bf86e8-8af1-11eb-9884-b46bfc50aa29}$$\\FigureID{08953506-8b7c-11eb-b618-b46bfc50aa29}$", "options": "['新农村建设后，种植收入减少', '新农村建设后，其他收入增加了一倍以上', '新农村建设后，养殖收入增加了一倍\\t', '新农村建设后，养殖收入与第三产业收入的总和超过了经济收入的一半']", "type": 6}
-{"stem": "记$\\mathrm{S}_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前n项和．若$3 \\mathrm{S}_{3}=\\mathrm{S}_{2}+\\mathrm{S}_{4}$，$a_{1}=2$，则$a_{5}=$（　　）", "options": "['﹣12', '﹣10', '10', '12']", "type": 6}
-{"stem": "设函数$f(x)=x^{3}+(a-1) x^{2}+a x$．若$f(x)$为奇函数，则曲线$y=f(x)$在点（0，0）处的切线方程为（　　）", "options": "['y=﹣2x', 'y=﹣x', 'y=2x', 'y=x']", "type": 6}
-{"stem": "在$\\triangle \\mathrm{ABC}$中，AD为BC边上的中线，E为AD的中点，则$\\overrightarrow{\\mathrm{EB}}$=（　　）", "options": "['$\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AB}}-\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AC}}$', '$\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AB}}-\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AC}}$', '$\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AB}}+\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AC}}$', '$\\\\frac{1}{4} \\\\overrightarrow{\\\\mathrm{AB}}+\\\\frac{3}{4} \\\\overrightarrow{\\\\mathrm{AC}}$']", "type": 6}
-{"stem": "某圆柱的高为2，底面周长为16，其三视图如图．圆柱表面上的点M在正视图上的对应点为A，圆柱表面上的点N在左视图上的对应点为B，则在此圆柱侧面上，从M到N的路径中，最短路径的长度为（　　）$\\FigureID{3bf98c4a-8af1-11eb-983a-b46bfc50aa29}$$\\FigureID{59bf86e9-8af1-11eb-a4e1-b46bfc50aa29}$$\\FigureID{08953507-8b7c-11eb-8cc5-b46bfc50aa29}$", "options": "['$2 \\\\sqrt{17}$', '$2 \\\\sqrt{5}$', '3', '2']", "type": 6}
-{"stem": "设抛物线C：$y^{2}=4 x$的焦点为F，过点（﹣2，0）且斜率为$\\frac{2}{3}$的直线与C交于M，N两点，则$\\overrightarrow{\\mathrm{FM}} \\cdot \\overrightarrow{\\mathrm{FN}}$=（　　）", "options": "['5', '6', '7', '8']", "type": 6}
-{"stem": "已知函数$f(x)=\\left\\{\\begin{array}{ll}e^{x}, & x \\leqslant 0 \\ \\ln x, & x>0\\end{array}\\right.$，$g(x)=f(x)+x+a$．若g（x）存在2个零点，则a的取值范围是（　　）", "options": "['[-1,0)', '$[0,+\\\\infty)$', '$[-1,+\\\\infty)$', '$[1,+\\\\infty)$']", "type": 6}
-{"stem": "如图来自古希腊数学家希波克拉底所研究的几何图形．此图由三个半圆构成，三个半圆的直径分别为直角三角形ABC的斜边BC，直角边AB，AC．$\\triangle \\mathrm{ABC}$的三边所围成的区域记为I，黑色部分记为Ⅱ，其余部分记为Ⅲ．在整个图形中随机取一点，此点取自Ⅰ，Ⅱ，Ⅲ的概率分别记为$p_{1}$，$p_{2}$，$ p_{3}$，则（　　）$\\FigureID{3bf98c4b-8af1-11eb-ab5e-b46bfc50aa29}$$\\FigureID{59bf86ea-8af1-11eb-88d0-b46bfc50aa29}$$\\FigureID{08953508-8b7c-11eb-a8cb-b46bfc50aa29}$", "options": "['$p_{1}=p_{2}$', '$p_{1}=p_{3}$', '$p_{2}=p_{3}$', '$p_{1}=p_{2}+p_{3}$']", "type": 6}
-{"stem": "已知双曲线C：$\\frac{x^{2}}{3}-y^{2}=1$，O为坐标原点，F为C的右焦点，过F的直线与C的两条渐近线的交点分别为M，N．若$\\triangle$OMN为直角三角形，则$|\\mathrm{MN}|=$（　　）", "options": "['$\\\\frac{3}{2}$', '3', '$2 \\\\sqrt{3}$', '4']", "type": 6}
-{"stem": "已知正方体的棱长为1，每条棱所在直线与平面α所成的角都相等，则α截此正方体所得截面面积的最大值为（　　）", "options": "['$\\\\frac{3 \\\\sqrt{3}}{4}$', '$\\\\frac{2 \\\\sqrt{3}}{3}$', '$\\\\frac{3 \\\\sqrt{2}}{4}$', '$\\\\frac{\\\\sqrt{3}}{2}$']", "type": 6}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x-2 y-2 \\leqslant 0 \\ x-y+1 \\geqslant 0 \\ y \\leq 0\\end{array}\\right.$，则z=3x+2y的最大值为_______", "options": "[]", "type": 2}
-{"stem": "记$\\mathrm{S}_{n}$为数列$\\left\\{a_{n}\\right\\}$的前n项和．若$\\mathrm{S}_{n}=2 a_{n}+1$，则$\\mathrm{S}_{6}=$_______", "options": "[]", "type": 2}
-{"stem": "从2位女生，4位男生中选3人参加科技比赛，且至少有1位女生入选，则不同的选法共有_______种．（用数字填写答案）", "options": "[]", "type": 2}
-{"stem": "已知函数$f(x)=2 \\sin x+\\sin 2 x$，则$f(x)$的最小值是$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "在平面四边形ABCD中，$\\angle \\mathrm{ADC}=90^{\\circ}$，$\\angle A=45^{\\circ}$，AB=2，BD=5．\n（1）求$\\cos \\angle \\mathrm{ADB}$；（2）若DC=$2 \\sqrt{2}$，求BC．", "options": "[]", "type": 4}
-{"stem": "）如图，四边形ABCD为正方形，E，F分别为AD，BC的中点，以DF为折痕把$\\triangle \\mathrm{DFC}$折起，使点C到达点P的位置，目 PF $\\perp$ BF.（1）证明：平面PEF $\\perp$平面ABFD；（2）求DP与平面ABFD所成角的正弦值．$\\FigureID{3bf98c4c-8af1-11eb-9d23-b46bfc50aa29}$$\\FigureID{59bfac74-8af1-11eb-b7c2-b46bfc50aa29}$$\\FigureID{08953509-8b7c-11eb-83a6-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "设椭圆C：$\\frac{x^{2}}{2}+y^{2}=1$的右焦点为F，过F的直线l与C交于A，B两点，点M的坐标为（2，0）．（1）当l与x轴垂直时，求直线AM的方程；（2）设O为坐标原点，证明：$\\angle \\mathrm{OMA}=\\angle \\mathrm{OMB}$．", "options": "[]", "type": 4}
-{"stem": "某工厂的某种产品成箱包装，每箱200件，每一箱产品在交付用户之前要对产品作检验，如检验出不合格品，则更换为合格品．检验时，先从这箱产品中任取20件作检验，再根据检验结果决定是否对余下的所有产品作检验．设每件产品为不合格品的概率都为$p(0<p<1)$，且各件产品是否为不合格品相互独立．（1）记20件产品中恰有2件不合格品的概率为$f(p)$，求$f(p)$的最大值点$p_{0}$．（2）现对一箱产品检验了20件，结果恰有2件不合格品，以（1）中确定的$p_{0}$作为p的值．已知每件产品的检验费用为2元，若有不合格品进入用户手中，则工厂要对每件不合格品支付25元的赔偿费用．\n（i）若不对该箱余下的产品作检验，这一箱产品的检验费用与赔偿费用的和记为X，求EX；\n（ii）以检验费用与赔偿费用和的期望值为决策依据，是否该对这箱余下的所有产品作检验？\n", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\frac{1}{x}-x+a \\ln x$．（1）讨论$f(x)$的单调性；（2）若$f(x)$存在两个极值点$x_{1}，x_{2}$，证明：$\\frac{f\\left(x_{1}\\right)-f\\left(x_{2}\\right)}{x_{1}-x_{2}}<a-2$．", "options": "[]", "type": 4}
-{"stem": "[选修4-4：坐标系与参数方程]在直角坐标系xOy中，曲线$C_{1}$的方程为$y=k|x|+2$．以坐标原点为极点，x轴正半轴为极轴建立极坐标系，曲线$C_{2}$的极坐标方程为$\\rho^{2}+2 \\rho \\cos \\theta-3=0$．（1）求$C_{2}$的直角坐标方程；（2）若$C_{1}$与$C_{2}$有且仅有三个公共点，求$C_{1}$的方程．", "options": "[]", "type": 4}
-{"stem": "[选修4-5：不等式选讲]已知$f(x)=|x+1|-|a x-1|$．（1）当$a=1$时，求不等式$f(x)>1$的解集；（2）若$x \\in(0,1)$时不等式$f(x)>x$，求a的取值范围．", "options": "[]", "type": 4}
-{"stem": "已知集合$M=\\{x |-4<x<2\\}，N=\\left\\{x | x^{2}-x-6<0\\right\\},$ 则 $M \\cap N=$", "options": "['$\\\\{x |-4<x<3\\\\}$', '$\\\\{x |-4<x<-2\\\\}$', '$\\\\{x |-2<x<2\\\\}$', '$\\\\{x | 2<x<3\\\\}$']", "type": 6}
-{"stem": "2.设复数z满足$|z-i|=1$，z在复平面内对应的点为(x，y)，则", "options": "['$(x+1)^{2}+y^{2}=1$', '$(x-1)^{2}+y^{2}=1$', '$x^{2}+(y-1)^{2}=1$', '$x^{2}+(y+1)^{2}=1$']", "type": 6}
-{"stem": "已知$a=\\log _{2} 0.2, b=2^{0.2}, c=0.2^{0.3}$，则", "options": "['$a<b<c$', '$a<c<b$', '$c<a<b$', '$b<c<a$']", "type": 6}
-{"stem": "古希腊时期，人们认为最美人体的头顶至肚脐的长度与肚脐至足底的长度之比是$\\frac{\\sqrt{5}-1}{2}$（$\\frac{\\sqrt{5}-1}{2} \\approx 0.618$，称为黄金分割比例)，著名的“断臂维纳斯”便是如此．此外，最美人体的头顶至咽喉的长度与咽喉至肚脐的长度之比也是$\\frac{\\sqrt{5}-1}{2}$．若某人满足上述两个黄金分割比例，且腿长为105cm，头顶至脖子下端的长度为26 cm，则其身高可能是$\\FigureID{3bf98c4d-8af1-11eb-bf17-b46bfc50aa29}$$\\FigureID{59bfac75-8af1-11eb-94c2-b46bfc50aa29}$$\\FigureID{08956ab0-8b7c-11eb-8fb0-b46bfc50aa29}$", "options": "['165 cm', '175 cm', '185 cm', '190cm']", "type": 6}
-{"stem": "函数$f(x)=\\frac{\\sin x+x}{\\cos x+x^{2}}$在$[-\\pi, \\pi]$的图像大致为", "options": "['$\\\\LUNAPictureID{3bff2862-8af1-11eb-b836-b46bfc50aa29}$$\\\\LUNAPictureID{59c4f39c-8af1-11eb-9351-b46bfc50aa29}$$\\\\LUNAPictureID{08999518-8b7c-11eb-9db3-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff2863-8af1-11eb-89d6-b46bfc50aa29}$$\\\\LUNAPictureID{59c4f39d-8af1-11eb-91c8-b46bfc50aa29}$$\\\\LUNAPictureID{0899c276-8b7c-11eb-b278-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff2864-8af1-11eb-adbe-b46bfc50aa29}$$\\\\LUNAPictureID{59c4f39e-8af1-11eb-bd68-b46bfc50aa29}$$\\\\LUNAPictureID{0899c277-8b7c-11eb-9de8-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff2865-8af1-11eb-a854-b46bfc50aa29}$$\\\\LUNAPictureID{59c4f39f-8af1-11eb-8a9e-b46bfc50aa29}$$\\\\LUNAPictureID{0899c278-8b7c-11eb-9972-b46bfc50aa29}$']", "type": 6}
-{"stem": "我国古代典籍《周易》用“卦”描述万物的变化．每一“重卦”由从下到上排列的6个爻组成，爻分为阳爻“——”和阴爻“— —”，如图就是一重卦．在所有重卦中随机取一重卦，则该重卦恰有3个阳爻的概率是$\\FigureID{3bf98c4e-8af1-11eb-9632-b46bfc50aa29}$$\\FigureID{59bfac76-8af1-11eb-9d8e-b46bfc50aa29}$$\\FigureID{08956ab1-8b7c-11eb-92bd-b46bfc50aa29}$", "options": "['$\\\\frac{5}{16}$', '$\\\\frac{11}{32}$', '$\\\\frac{21}{32}$', '$\\\\frac{11}{16}$']", "type": 6}
-{"stem": "已知非零向量a，b满足$|a|=2|b|$，且$(a-b) \\perp b$，则a与b的夹角为", "options": "['$\\\\frac{\\\\pi}{6}$', '$\\\\frac{\\\\pi}{3}$', '$\\\\frac{2 \\\\pi}{3}$', '$\\\\frac{5 \\\\pi}{6}$']", "type": 6}
-{"stem": "如图是求$\\frac{1}{2+\\frac{1}{2+\\frac{1}{2}}}$的程序框图，图中空白框中应填入$\\FigureID{3bf98c4f-8af1-11eb-8a5a-b46bfc50aa29}$$\\FigureID{59bfd39a-8af1-11eb-a291-b46bfc50aa29}$$\\FigureID{08956ab2-8b7c-11eb-a053-b46bfc50aa29}$", "options": "['$A=\\\\frac{1}{2+A}$', '$A=2+\\\\frac{1}{A}$', '$A=\\\\frac{1}{1+2 A}$', '$A=1+\\\\frac{1}{2 A}$']", "type": 6}
-{"stem": "记$S_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前n项和．已知$S_{4}=0，a_{5}=5$，则", "options": "['$a_{n}=2 n-5$', '$a_{n}=3 n-10$', '$S_{n}=2 n^{2}-8 n$', '$S_{n}=\\\\frac{1}{2} n^{2}-2 n$']", "type": 6}
-{"stem": "已知椭圆C的焦点为$F_{1}(-1,0), F_{2}(1,0)$，过$F_{2}$的直线与C交于A，B两点.若$\\left|A F_{2}\\right|=2\\left|F_{2} B\\right|,|A B|=\\left|B F_{1}\\right|$，则C的方程为", "options": "['$\\\\frac{x^{2}}{2}+y^{2}=1$', '$\\\\frac{x^{2}}{3}+\\\\frac{y^{2}}{2}=1$', '$\\\\frac{x^{2}}{4}+\\\\frac{y^{2}}{3}=1$', '$\\\\frac{x^{2}}{5}+\\\\frac{y^{2}}{4}=1$']", "type": 6}
-{"stem": "关于函数$f(x)=\\sin |x|+|\\sin x|$有下述四个结论：\n①f(x)是偶函数        ②f(x)在区间$\\left(\\frac{\\pi}{2}, \\pi\\right)$单调递增\n③f(x)在$[-\\pi, \\pi]$有4个零点    ④f(x)的最大值为2\n其中所有正确结论的编号是\n", "options": "['①②④', '②④', '①④', '①③']", "type": 6}
-{"stem": "已知三棱锥P-ABC的四个顶点在球O的球面上，PA=PB=PC，$\\triangle A B C$是边长为2的正三角形，E，F分别是PA，PB的中点，$\\angle C E F=90^{\\circ}$，则球O的体积为", "options": "['$8 \\\\sqrt{6} \\\\pi$', '$4 \\\\sqrt{6} \\\\pi$', '$2 \\\\sqrt{6} \\\\pi$', '$\\\\sqrt{6} \\\\pi$']", "type": 6}
-{"stem": "曲线$y=3\\left(x^{2}+x\\right) e^{x}$ 在点 (0,0)_______处的切线方程为", "options": "[]", "type": 2}
-{"stem": "记$S_{n}$为等比数列$\\left\\{a_{n}\\right\\}$ 的前 $n$ 项和．若 $a_{1}=\\frac{1}{3}，a_{4}^{2}=a_{6},$ 则 $S_{5}=$_______", "options": "[]", "type": 2}
-{"stem": "甲、乙两队进行篮球决赛，采取七场四胜制（当一队赢得四场胜利时，该队获胜，决赛结束）．根据前期比赛成绩，甲队的主客场安排依次为“主主客客主客主”．设甲队主场取胜的概率为0.6，客场取胜的概率为0.5，且各场比赛结果相互独立，则甲队以4∶1获胜的概率是_______", "options": "[]", "type": 2}
-{"stem": "已知双曲线C：$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1(a>0, b>0)$的左、右焦点分别为$F_{1}, F_{2}$，过$F_{1}$的直线与C的两条渐近线分别交于$A, B$ 两点．若$\\overrightarrow{F_{1} A}=\\overrightarrow{A B}, \\overrightarrow{F_{1} B} \\cdot \\overrightarrow{F_{2} B}=0$，则C的离心率为_______", "options": "[]", "type": 2}
-{"stem": "$\\Delta \\mathrm{ABC}$ 的内角 $A, B, C$ 的对边分别为 $a, b, c,$ 设 $(\\sin B-\\sin C)^{2}=\\sin ^{2} A-\\sin B \\sin C$．（1）求A（2）若 $\\sqrt{2} a+b=2 c，$ 求 $\\sin C$", "options": "[]", "type": 4}
-{"stem": "如图，直四棱柱$A B C D-A_{1} B_{1} C_{1} D_{1}$的底面是菱形，$A A_{1}=4，A B=2，\\angle B A D=60^{\\circ}，E，M$，N分别是 $B C， B B_{1},，A_{1} D$ 的中点．（1）证明：$M N / /$ 平面 $C_{1} D E$（2）求二面角$A-M A_{1}-N$的正弦值．$\\FigureID{3bf98c50-8af1-11eb-bd91-b46bfc50aa29}$$\\FigureID{59bfd39b-8af1-11eb-af6f-b46bfc50aa29}$$\\FigureID{08956ab3-8b7c-11eb-ab64-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知抛物线C：$y^{2}=3 x$的焦点为F，斜率为$\\frac{3}{2}$的直线l与C的交点为A，B，与x轴的交点为P．（1）若$|A F|+|B F|=4$，求l的方程（2）若$\\overrightarrow{A P}=3 \\overrightarrow{P B}$，求$|A B|$．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\sin x-\\ln (1+x)，\\quad f^{\\prime}(x)$ 为 $f(x)$的导数．证明：（1）$f^{\\prime}(x)$ 在区间 $\\left(-1, \\frac{\\pi}{2}\\right)$存在唯一极大值点（2）$f(x)$有且仅有2个零点", "options": "[]", "type": 4}
-{"stem": "为了治疗某种疾病，研制了甲、乙两种新药，希望知道哪种新药更有效，为此进行动物试验．试验方案如下：每一轮选取两只白鼠对药效进行对比试验．对于两只白鼠，随机选一只施以甲药，另一只施以乙药．一轮的治疗结果得出后，再安排下一轮试验．当其中一种药治愈的白鼠比另一种药治愈的白鼠多4只时，就停止试验，并认为治愈只数多的药更有效．为了方便描述问题，约定：对于每轮试验，若施以甲药的白鼠治愈且施以乙药的白鼠未治愈则甲药得1分，乙药得 分；若施以乙药的白鼠治愈且施以甲药的白鼠未治愈则乙药得1分，甲药得 分；若都治愈或都未治愈则两种药均得0分．甲、乙两种药的治愈率分别记为α和β，一轮试验中甲药的得分记为X．（1）求X的分布列；（2）若甲药、乙药在试验开始时都赋予4分，$p_{i}(i=0,1, \\cdots, 8)$表示“甲药的累计得分为i时，最终认为甲药比乙药更有效”的概率，则$p_{0}=0, \\quad p_{8}=1$，\n$p_{i}=a p_{i-1}+b p_{i}+c p_{i+1}(i=1,2, \\cdots, 7),$ 其中 $a=P(X=-1), b=P(X=0)$，\n$c=P(X=1) \\cdot$ 假设 $\\alpha=0.5, \\beta=0.8$\n(i)证明：$\\left\\{p_{i+1}-p_{i}\\right\\}(i=0,1,2, \\cdots, 7)$为等比数列；\n(ii)求$p_{4}$，并根据$p_{4}$的值解释这种试验方案的合理性．\n", "options": "[]", "type": 4}
-{"stem": "[选修4-4：坐标系与参数方程] 在直角坐标系xOy中，曲线C的参数方程为$\\left\\{\\begin{array}{l}x=\\frac{1-t^{2}}{1+t^{2}} \\ y=\\frac{4 t}{1+t^{2}}\\end{array}\\right.$（t为参数），以坐标原点O为极点，x轴的正半轴为极轴建立极坐标系，直线l的极坐标方程为$2 \\rho \\cos \\theta+\\sqrt{3} \\rho \\sin \\theta+11=0$．（1）求C和l的直角坐标方程；（2）求C上的点到l距离的最小值．", "options": "[]", "type": 4}
-{"stem": "[选修4-5：不等式选讲]已知$a, b, c$ 为正数，且满足 $a b c=1$．证明：（1）$\\frac{1}{a}+\\frac{1}{b}+\\frac{1}{c} \\leq a^{2}+b^{2}+c^{2}$（2）$(a+b)^{3}+(b+c)^{3}+(c+a)^{3} \\geq 24$", "options": "[]", "type": 4}
-{"stem": "设集合$S=\\{x |(x-2)(x-3) \\geqslant 0\\}$，$T=\\{x | x>0\\}$，则$\\mathrm{S} \\cap \\mathrm{T}=$（　　）", "options": "['[2,3]', '$(-\\\\infty, 2] \\\\cup[3,+\\\\infty)$', '$[3,+\\\\infty)$', '(0,2]$\\\\cup[3,+\\\\infty)$']", "type": 6}
-{"stem": "若$z=1+2$，则$\\frac{4 i}{z^{\\bullet} \\bar{z}-1}=$（　　）", "options": "['1', '-1', 'i', '-i']", "type": 6}
-{"stem": "已知向量$\\overrightarrow{B A}=\\left(\\frac{1}{2}, \\frac{\\sqrt{3}}{2}\\right)$，$\\overrightarrow{\\mathrm{BC}}=\\left(\\frac{\\sqrt{3}}{2}, \\frac{1}{2}\\right)$，则$\\angle \\mathrm{ABC}=$（　　）", "options": "['30°', '45°', '60°', '120°\\t']", "type": 6}
-{"stem": "某旅游城市为向游客介绍本地的气温情况，绘制了一年中各月平均最高气温和平均最低气温的雷达图，图中A点表示十月的平均最高气温约为15℃，B点表示四月的平均最低气温约为5℃，下面叙述不正确的是（　　）$\\FigureID{3bf9e924-8af1-11eb-b141-b46bfc50aa29}$$\\FigureID{59bffaa4-8af1-11eb-b583-b46bfc50aa29}$$\\FigureID{08959210-8b7c-11eb-b5d5-b46bfc50aa29}$", "options": "['各月的平均最低气温都在0℃以上', '七月的平均温差比一月的平均温差大', '三月和十一月的平均最高气温基本相同', '平均最高气温高于20℃的月份有5个']", "type": 6}
-{"stem": "若$\\tan a=\\frac{3}{4}$，则$\\cos ^{2} a+2 \\sin 2 a=$（　　）", "options": "['$\\\\frac{64}{25}$', '$\\\\frac{48}{25}$', '1', '$\\\\frac{16}{25}$']", "type": 6}
-{"stem": "已知$a=2^{\\frac{4}{3}}$，$b=3^{\\frac{2}{3}}$，$c=25^{\\frac{1}{3}}$，则（　　）", "options": "['$b<a<c$', '$a<b<c$', '$b<c<a$', '$c<a<b$']", "type": 6}
-{"stem": "执行如图程序框图，如果输入的$a=4$，$b=6$，那么输出的$n=$（　　）$\\FigureID{3bf9e925-8af1-11eb-b149-b46bfc50aa29}$$\\FigureID{59bffaa5-8af1-11eb-a5c6-b46bfc50aa29}$$\\FigureID{08959211-8b7c-11eb-9b6b-b46bfc50aa29}$", "options": "['3', '4', '5', '6']", "type": 6}
-{"stem": "在△ABC中，$B=\\frac{\\pi}{4}$，$B C$边上的高等于$\\frac{1}{3} B C$，则$\\cos A$等于（　　）", "options": "['$\\\\frac{3 \\\\sqrt{10}}{10}$', '$\\\\frac{\\\\sqrt{10}}{10}$', '$-\\\\frac{\\\\sqrt{10}}{10}$', '$-\\\\frac{3\\\\sqrt{10}}{10}$']", "type": 6}
-{"stem": "如图，网格纸上小正方形的边长为1，粗实线画出的是某多面体的三视图，则该多面体的表面积为（　　）$\\FigureID{3bfa1828-8af1-11eb-88e2-b46bfc50aa29}$$\\FigureID{59c021be-8af1-11eb-b397-b46bfc50aa29}$$\\FigureID{0895a492-8b7c-11eb-9da6-b46bfc50aa29}$", "options": "['$18+36 \\\\sqrt{5}$', '$54+18 \\\\sqrt{5}$', '90', '81']", "type": 6}
-{"stem": "在封闭的直三棱柱$\\mathrm{ABC}-\\mathrm{A}_{1} \\mathrm{B}_{1}\\mathrm{C}_{1}$内有一个体积为V的球，若$A B \\perp B C$，$A B=6$，$\\mathrm{BC}=8$，$A A_{1}=3$，则V的最大值是（　　）", "options": "['$4 \\\\pi$', '$\\\\frac{9 \\\\pi}{2}$', '$6 \\\\pi$', '$\\\\frac{32 \\\\pi}{3}$']", "type": 6}
-{"stem": "已知O为坐标原点，F是椭圆C：$\\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1 \\quad(a>b>0)$的左焦点，A，B分别为C的左，右顶点．P为C上一点，且$P F \\perp x$轴，过点A的直线l与线段PF交于点M，与y轴交于点E．若直线BM经过OE的中点，则C的离心率为（　　）", "options": "['$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{2}{3}$', '$\\\\frac{3}{4}$']", "type": 6}
-{"stem": "定义“规范01数列”$\\left\\{a_{n}\\right\\}$如下：$\\left\\{a_{n}\\right\\}$共有2m项，其中m项为0，m项为1，且对任意$\\mathrm{k} \\leqslant 2 \\mathrm{m}, \\mathrm{a}_{1}, \\mathrm{a}_{2}, \\ldots, \\mathrm{a}_{\\mathrm{k}}$中0的个数不少于1的个数，若m=4，则不同的“规范01数列”共有（　　）", "options": "['18个', '16个', '14个', '12个']", "type": 6}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x-y+1 \\geq 0 \\ x-2 y \\leq 0 \\ x+2 y-2 \\leq 0\\end{array}\\right.$，则z=x+y的最大值为_______", "options": "[]", "type": 2}
-{"stem": "函数$y=\\sin x-\\sqrt{3} \\cos x$的图象可由函数$y=\\sin x+\\sqrt{3} \\cos x$的图象至少向右平移$\\SIFBlank$个单位长度得到", "options": "[]", "type": 2}
-{"stem": "已知$f(x)$为偶函数，当$x<0$时，$f(x)=\\ln (-x)+3 x$，则曲线$y=f(x)$在点(1,-3)处的切线方程是_______", "options": "[]", "type": 2}
-{"stem": "已知直线l：$m x+y+3 m-\\sqrt{3}=0$与圆$x^{2}+y^{2}=12$交于A，B两点，过A，B分别作l的垂线与x轴交于C，D两点，若$|A B|=2 \\sqrt{3}$，则$|C D|=$_______", "options": "[]", "type": 2}
-{"stem": "已知数列$\\left\\{a_{n}\\right\\}$的前n项和$\\mathrm{S}_{n}=1+\\lambda \\mathrm{a}_{n}$，其中$\\lambda \\neq 0$．证明$\\left\\{a_{n}\\right\\}$是等比数列，并求其通项公式；若$\\mathrm{S}_{5}=\\frac{31}{32}$，求λ．", "options": "[]", "type": 4}
-{"stem": "如图是我国2008年至2014年生活垃圾无害化处理量（单位：亿吨）的折线图．\n注：年份代码1﹣7分别对应年份2008﹣2014．\n附注：\n参考数据：$\\sum_{i=1}^{7} y_{i}=9.32, \\quad \\sum_{i=1}^{7} t_{i} y_{i}=40.17, \\quad \\sqrt{\\sum_{i=1}^{7}\\left(y_{i}-\\bar{y}\\right)^{2}}=0.55, \\quad \\sqrt{7} \\approx 2.646$\n参考公式：相关系数$r=\\frac{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)\\left(y_{i}-\\bar{y}\\right)}{\\sqrt{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)^{2} \\sum_{i=1}^{n}\\left(y_{i}-\\bar{y}\\right)^{2}}}$，\n回归方程$\\hat{y}=\\hat{a}+\\hat{b} t$中斜率和截距的最小二乘估计公式分别为：\n$\\hat{b}=\\frac{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)\\left(y_{i}-\\bar{y}\\right)}{\\sum_{i=1}^{n}\\left(t_{i}-\\bar{t}\\right)^{2}}, \\quad \\widehat{a}=\\bar{y}-\\widehat{b} \\bar{t}$由折线图看出，可用线性回归模型拟合y与t的关系，请用相关系数加以证明；建立y关于t的回归方程（系数精确到0.01），预测2016年我国生活垃圾无害化处理量．$\\FigureID{3bfa1829-8af1-11eb-8aaf-b46bfc50aa29}$$\\FigureID{59c021bf-8af1-11eb-a8b7-b46bfc50aa29}$$\\FigureID{0895a493-8b7c-11eb-9d22-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "如图，四棱锥P﹣ABCD中，PA⊥底面ABCD，AD∥BC，AB=AD=AC=3，PA=BC=4，M为线段AD上一点，AM=2MD，N为PC的中点．证明：MN∥平面PAB；求直线AN与平面PMN所成角的正弦值．$\\FigureID{3bfa182a-8af1-11eb-ac34-b46bfc50aa29}$$\\FigureID{59c021c0-8af1-11eb-81a1-b46bfc50aa29}$$\\FigureID{0895a494-8b7c-11eb-9011-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知抛物线C：$y^{2}=2 x$的焦点为F，平行于x轴的两条直线$l_{1}$，$l_{2}$分别交C于A，B两点，交C的准线于P，Q两点．若F在线段AB上，R是PQ的中点，证明AR∥FQ；若△PQF的面积是△ABF的面积的两倍，求AB中点的轨迹方程．", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=\\operatorname{a \\cos} 2 x+(a-1)(\\cos x+1)$，其中a＞0，记$|f (x)|$的最大值为A．求$f^{\\prime}(x)$；求A；证明：$|f ^{\\prime}(x) | \\leqslant 2 A$．", "options": "[]", "type": 4}
-{"stem": "如图，⊙O中$\\widehat{A B}$的中点为P，弦PC，PD分别交AB于E，F两点．若∠PFB=2∠PCD，求∠PCD的大小；若EC的垂直平分线与FD的垂直平分线交于点G，证明：OG⊥CD．$\\FigureID{3bfa404c-8af1-11eb-9377-b46bfc50aa29}$$\\FigureID{59c0489c-8af1-11eb-bfce-b46bfc50aa29}$$\\FigureID{0895a495-8b7c-11eb-a729-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，曲线$\\mathrm{C}_{1}$的参数方程为$\\left\\{\\begin{array}{l}x=\\sqrt{3} \\cos \\alpha \\ y=\\sin \\alpha\\end{array}\\right.$（α为参数），以坐标原点为极点，以x轴的正半轴为极轴，建立极坐标系，曲线$\\mathrm{C}_{2}$的极坐标方程为$\\operatorname{\\rho sin}\\left(\\theta+\\frac{\\pi}{4}\\right)=2 \\sqrt{2}$．写出$\\mathrm{C}_{1}$的普通方程和$\\mathrm{C}_{2}$的直角坐标方程；设点P在$\\mathrm{C}_{1}$上，点Q在$\\mathrm{C}_{2}$上，求|PQ|的最小值及此时P的直角坐标．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=|2 x-a|+a$．当a=2时，求不等式$f(x) \\leqslant 6$的解集；设函数$g(x)=|2 x-1|$，当x∈R时，$f(x)+g(x) \\geqslant 3$，求a的取值范围．", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\left\\{(x, y) | x^{2}+y^{2}=1\\right\\}, \\quad B=\\{(x, y) | y=x\\}$，则$A \\cap B$中元素的个数为（　　）", "options": "['3', '2', '1', '0']", "type": 6}
-{"stem": "设复数z满足$(1+i) \\quad z=2 i$，则$|z|=$（　　）", "options": "['$\\\\frac{1}{2}$', '$\\\\frac{\\\\sqrt{2}}{2}$', '$\\\\sqrt{2}$', '2']", "type": 6}
-{"stem": "某城市为了解游客人数的变化规律，提高旅游服务质量，收集并整理了2014年1月至2016年12月期间月接待游客量（单位：万人）的数据，绘制了下面的折线图．$\\FigureID{3bfa677a-8af1-11eb-8799-b46bfc50aa29}$$\\FigureID{59c0489d-8af1-11eb-8298-b46bfc50aa29}$$\\FigureID{0895cbdc-8b7c-11eb-8f99-b46bfc50aa29}$", "options": "['月接待游客量逐月增加', '年接待游客量逐年增加\\t', '各年的月接待游客量高峰期大致在7，8月', '各年1月至6月的月接待游客量相对于7月至12月，波动性更小，变化比较平稳']", "type": 6}
-{"stem": "$(x+y)(2 x-y)^{5}$的展开式中的$x^{3} y^{3}$系数为（　　）", "options": "['-80', '-40', '40', '80']", "type": 6}
-{"stem": "已知双曲线C：$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, b>0)$ 的一条渐近线方程为$y=\\frac{\\sqrt{5}}{2} x$，且与椭圆$\\frac{x^{2}}{12}+\\frac{y^{2}}{3}=1$有公共焦点，则C的方程为（　　）", "options": "['$\\\\frac{x^{2}}{8}-\\\\frac{y^{2}}{10}=1$', '$\\\\frac{x^{2}}{4}-\\\\frac{y^{2}}{5}=1$', '$\\\\frac{x^{2}}{5}-\\\\frac{y^{2}}{4}=1$', '$\\\\frac{x^{2}}{4}-\\\\frac{y^{2}}{3}=1$']", "type": 6}
-{"stem": "设函数$f(x)=\\cos \\left(x+\\frac{\\pi}{3}\\right)$，则下列结论错误的是（　　）", "options": "['$f(x)$的一个周期为﹣2π\\t', '$y=f(x)$的图象关于直线$x=\\\\frac{8 \\\\pi}{3}$对称', '$f(x+\\\\pi)$的一个零点为$x=\\\\frac{\\\\pi}{6}$', '$f(x)$在$\\\\left(\\\\frac{\\\\pi}{2}, \\\\pi\\\\right)$单调递减\\t']", "type": 6}
-{"stem": "执行如图的程序框图，为使输出S的值小于91，则输入的正整数N的最小值为（　　）$\\FigureID{3bfa677b-8af1-11eb-a977-b46bfc50aa29}$$\\FigureID{59c0489e-8af1-11eb-9ad0-b46bfc50aa29}$$\\FigureID{0895cbdd-8b7c-11eb-a906-b46bfc50aa29}$", "options": "['5', '4', '3', '2']", "type": 6}
-{"stem": "已知圆柱的高为1，它的两个底面的圆周在直径为2的同一个球的球面上，则该圆柱的体积为（　　）", "options": "['$\\\\pi$', '$\\\\frac{3 \\\\pi}{4}$', '$\\\\frac{\\\\pi}{2}$', '$\\\\frac{\\\\pi}{4}$']", "type": 6}
-{"stem": "等差数列 $\\{ \\left. a_{n}\\right\\}$ 的首项为 $1, \\quad$ 公差不为 0. 若 $a_{2}, \\quad a_{3}, \\quad a_{6}$ 成等比数列，则\n$\\left\\{a_{n}\\right\\}$ 前 6 项的和为 （    ）", "options": "['-24', '-3', '3', '8']", "type": 6}
-{"stem": "巳知椭圆 C: $\\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1 \\quad(a>b>0)$ 的左、右顶点分别为 $A_{1}, \\quad A_{2}, \\quad$ 且\n以线段 A $_{1} \\mathrm{A}_{2}$ 为直径的圆与直线 $\\mathrm{bx}-\\mathrm{ay}+2 \\mathrm{ab}=0$ 相切，则 $\\mathrm{C}$ 的离心率为 (    ）", "options": "['$\\\\frac{\\\\sqrt{6}}{3}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{\\\\sqrt{2}}{3}$', '$\\\\frac{1}{3}$']", "type": 6}
-{"stem": "已知函数 $f(x)=x^{2}-2 x+a\\left(e^{x \\cdot 1}+e^{-x+1}\\right)$ 有唯一零点，则 $a=(\\quad)$", "options": "['$-\\\\frac{1}{2}$', '$\\\\frac{1}{3}$', '$\\\\frac{1}{2}$', '1']", "type": 6}
-{"stem": "（5 分）在矩形 ABCD 中，AB=1，AD=2，动点 P 在以点 C 为圆心且与 BD 相切\n的圆上. 若$\\overrightarrow{\\mathrm{AP}}=\\lambda \\overrightarrow{\\mathrm{AB}}+\\mu \\overrightarrow{\\mathrm{AD}}$，则$\\lambda+\\mu$的最大值为（    ）", "options": "['3', '$2 \\\\sqrt{2}$', '$\\\\sqrt{5}$', '2']", "type": 6}
-{"stem": "若 $\\mathrm{x},$ y 满足约束条件 $\\left\\{\\begin{array}{l}\\mathrm{x}-\\mathrm{y} \\geqslant 0 \\ \\mathrm{x}+\\mathrm{y}-2 \\leqslant 0, \\text { 则 } \\mathrm{z}=3 \\mathrm{x}-4 \\mathrm{y} \\text { 的最小值为 } \\ y \\geqslant 0\\end{array}\\right.$", "options": "[]", "type": 2}
-{"stem": "设等比数列$\\left\\{a_{n}\\right\\}$满足$a_{1}+a_{2}=-1, \\quad a_{1}-a_{3}=-3, \\quad$ 则 $a_{4}=$", "options": "[]", "type": 2}
-{"stem": "设函数 $f(x)=\\left\\{\\begin{array}{ll}x+1, & x \\leq 0 \\ 2^{x}, & x>0\\end{array}\\right.$则满足$f(x)+f\\left(x-\\frac{1}{2}\\right)>1$ 的 x 的取值范围是____", "options": "[]", "type": 2}
-{"stem": "16．（5分）a，b为空间中两条互相垂直的直线，等腰直角三角形ABC的直角边AC所在直线与a，b都垂直，斜边AB以直线AC为旋转轴旋转，有下列结论：\n①当直线AB与a成60°角时，AB与b成30°角；\n②当直线AB与a成60°角时，AB与b成60°角；\n③直线AB与a所成角的最小值为45°；\n④直线AB与a所成角的最小值为60°；\n其中正确的是____．（填写所有正确结论的编号）\n", "options": "[]", "type": 2}
-{"stem": "$\\triangle \\mathrm{ABC}$ 的内角 A, B，C 的对边分别为 a, b，c，已知 $\\sin A + \\sqrt{3} \\cos A=0, \\quad a=2 \\sqrt{7}$\n\\[\nb=2\n\\]求c设 D 为 BC边上一点，且 $A D \\perp A C$，求$\\triangle \\mathrm{ABD}$的面积。", "options": "[]", "type": 4}
-{"stem": "某超市计划按月订购一种酸奶，每天进货量相同，进货成本每瓶4元，售价每瓶6元，未售出的酸奶降价处理，以每瓶2元的价格当天全部处理完．根据往年销售经验，每天需求量与当天最高气温（单位：℃）有关．如果最高气温不低于25，需求量为500瓶；如果最高气温位于区间[20，25），需求量为300瓶；如果最高气温低于20，需求量为200瓶．为了确定六月份的订购计划，统计了前三年六月份各天的最高气温数据，得下面的频数分布表：\n以最高气温位于各区间的频率代替最高气温位于该区间的概率．\n\n（1）求六月份这种酸奶一天的需求量X（单位：瓶）的分布列；\n（2）设六月份一天销售这种酸奶的利润为Y（单位：元），当六月份这种酸奶一天的进货量n（单位：瓶）为多少时，Y的数学期望达到最大值？", "options": "[]", "type": 4}
-{"stem": "如图，四面体 ABCD 中，$\\triangle \\mathrm{ABC}$是正三角形，$\\triangle \\mathrm{ACD}$ 是直角三角形， $\\angle A B D=\\angle C B D$\n\\[\nA B=B D\n\\]\n\n（1）证明: 平面 $A C D \\perp$ 平面$A B C$（2）过 AC 的平面交 BD 于点 E，若平亩 AEC 把四面体 ABCD 分成体积相等的两\n部分，求二面角 D - AE - C 的余弦值。$\\FigureID{3bfa8e8a-8af1-11eb-a62a-b46bfc50aa29}$$\\FigureID{59c077de-8af1-11eb-ba25-b46bfc50aa29}$$\\FigureID{0895cbde-8b7c-11eb-b0b4-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知抛物线 C: $y^{2}=2 x,$ 过点（2，0）的直线$l$交C于 A，B 两点，圆 M 是以线段AB 为直径的圆。（1）证明：坐标原点 O 在圆 M 上;\n（2）设圆 M 过点P（4， - 2），求直线$l$与圆 M 的方程。", "options": "[]", "type": 4}
-{"stem": "已知函数 $f(x)=x-1-\\operatorname{aln} x$若 $f(x) \\geqslant 0,$ 求 a 的值;设 m 为整数，且对于任意正整数\nn $,\\left(1+\\frac{1}{2}\\right)\\left(1+\\frac{1}{2^{2}}\\right) \\ldots\\left(1+\\frac{1}{2^{n}}\\right)<m,$ 求m 的最小值。", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，直线$l_{1}$的参数方程为$\\left\\{\\begin{array}{l}x=2+t \\ y=k t\\end{array}, \\quad(t \\text { 为参数 })\\right.$\n直线 $l_{2}$ 的参数方程为 $\\left\\{\\begin{array}{l}\\mathrm{x}=-2+\\mathrm{m} \\ \\mathrm{y}=\\frac{\\mathrm{m}}{\\mathrm{k}} \\quad, \\quad(\\mathrm{m} \\text { 为参数 }) . \\text { 设 } l_{1} \\text { 与 }l_{2} \\text { 的交点为 } \\mathrm{P}, \\text { 当 } \\mathrm{k} \\text { 变化 }\\end{array}\\right.$\n时，P 的轨迹为曲线 C.写出C的普通方程以坐标原点为极点，x轴正半轴为极轴建立极坐标系，设$l_{3}: \\rho(\\cos \\theta+\\sin \\theta)-\\sqrt{2}=0, \\quad \\mathrm{M}$ 为 $l_{3}$ 与 $\\mathrm{C}$ 的交点， $,$ 求 $\\mathrm{M}$ 的极径.", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=|x+1|-|x-2|$求不等式 $f（x）\\geqslant1 $的解集;若不等式 $f (x) \\geqslant x^{2}- x+m $的解集非空，求 m 的取值范围。", "options": "[]", "type": 4}
-{"stem": "已知集合 $A=\\{x | x-1 \\geqslant 0\\}, \\quad B=\\{0, \\quad 1, \\quad 2\\}, \\quad$ 则 $A \\cap B=(\\quad)$", "options": "['{0}', '{1}', '{1，2}', '{0，1，2}\\t']", "type": 6}
-{"stem": "$(1+i)(2-i)=(\\quad)$ =（　　）", "options": "['$-3-i$', '$-3+i$', '$3-i$', '$3+i$']", "type": 6}
-{"stem": "中国古建筑借助榫卯将木构件连接起来．构件的凸出部分叫榫头，凹进部分叫卯眼，图中木构件右边的小长方体是榫头．若如图摆放的木构件与某一带卯眼的木构件咬合成长方体，则咬合时带卯眼的木构件的俯视图可以是（　　）$\\FigureID{3bfa8e8b-8af1-11eb-a4cf-b46bfc50aa29}$$\\FigureID{59c077df-8af1-11eb-b0bb-b46bfc50aa29}$$\\FigureID{0895cbdf-8b7c-11eb-90b8-b46bfc50aa29}$", "options": "['$\\\\LUNAPictureID{3bff768a-8af1-11eb-9d99-b46bfc50aa29}$$\\\\LUNAPictureID{59c51af6-8af1-11eb-a52c-b46bfc50aa29}$$\\\\LUNAPictureID{089a10dc-8b7c-11eb-bf46-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff9da4-8af1-11eb-955d-b46bfc50aa29}$$\\\\LUNAPictureID{59c51af7-8af1-11eb-a850-b46bfc50aa29}$$\\\\LUNAPictureID{089a10dd-8b7c-11eb-9368-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff9da5-8af1-11eb-85e7-b46bfc50aa29}$$\\\\LUNAPictureID{59c51af8-8af1-11eb-bfec-b46bfc50aa29}$$\\\\LUNAPictureID{089a10de-8b7c-11eb-a1ad-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff9da6-8af1-11eb-aea4-b46bfc50aa29}$$\\\\LUNAPictureID{59c51af9-8af1-11eb-b9ed-b46bfc50aa29}$$\\\\LUNAPictureID{089a10df-8b7c-11eb-82ed-b46bfc50aa29}$']", "type": 6}
-{"stem": "若 $\\sin \\alpha=\\frac{1}{3},$ 则 $\\cos 2 \\alpha=$$\\SIFChoice$", "options": "['$\\\\frac{8}{9}$', '$\\\\frac{7}{9}$', '$-\\\\frac{7}{9}$', '$-\\\\frac{8}{9}$']", "type": 6}
-{"stem": "$\\left(x^{2}+\\frac{2}{x}\\right)^{5}$ 的展开式中 $\\mathbf{x}^{4}$ 的系数为$\\SIFChoice$", "options": "['1', '2', '4', '8']", "type": 6}
-{"stem": "直线 x+y+2=0 分别与 x 轴，y轴交于 A，B 两点，点 P 在圆 (x-2) $^{2}+y^{2}=2$ 上，则\n$\\triangle \\mathrm{ABP}$ 面积的取值范围是（）", "options": "['[2,6]', '[4，8]', '$[\\\\sqrt{2}, 3 \\\\sqrt{2}]$', '$[2 \\\\sqrt{2}, 3 \\\\sqrt{2}]$']", "type": 6}
-{"stem": "函数$y=-x^{4}+x^{2}+2$的图像大致为\n", "options": "['$\\\\LUNAPictureID{3bff9da7-8af1-11eb-a660-b46bfc50aa29}$$\\\\LUNAPictureID{59c51afa-8af1-11eb-9f7d-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e0-8b7c-11eb-b564-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff9da8-8af1-11eb-a2d6-b46bfc50aa29}$$\\\\LUNAPictureID{59c51afb-8af1-11eb-a7ba-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e1-8b7c-11eb-9427-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff9da9-8af1-11eb-9121-b46bfc50aa29}$$\\\\LUNAPictureID{59c51afc-8af1-11eb-847c-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e2-8b7c-11eb-89a0-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bff9daa-8af1-11eb-a8f0-b46bfc50aa29}$$\\\\LUNAPictureID{59c51afd-8af1-11eb-bd01-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e3-8b7c-11eb-8f69-b46bfc50aa29}$']", "type": 6}
-{"stem": "某群体中的每位成员使用移动支付的概率都为p，各成员的支付方式相互独立．设X为该群体的10位成员中使用移动支付的人数$\\mathrm{DX}=2.4, \\quad \\mathrm{P}(\\mathrm{x}=4)<\\mathrm{P}(\\mathrm{X}=6), \\quad$ 则 $\\mathrm{p}=(\\quad)$", "options": "['0.7', '0.6', '0.4', '0.3']", "type": 6}
-{"stem": "$\\triangle \\mathrm{ABC}$ 的内角 $\\mathrm{A}, \\quad \\mathrm{B}, \\quad$ C的对边分别为 $\\mathrm{a}, \\quad \\mathrm{b}, \\quad \\mathrm{c} . \\quad$ 若 $\\triangle \\mathrm{ABC}$ 的面积为 $\\frac{\\mathrm{a}^{2}+\\mathrm{b}^{2}-\\mathrm{c}^{2}}{4}$\n\\[\n\\text { 则 } C=(\\quad)\n\\]", "options": "['$\\\\frac{\\\\pi}{2}$', '$\\\\frac{\\\\pi}{3}$', '$\\\\frac{\\\\pi}{4}$', '$\\\\frac{\\\\pi}{6}$']", "type": 6}
-{"stem": "设A，B，C，D是同一个半径为4的球的球面上四点，$\\triangle \\mathrm{ABC}$ 为等边三角形且面积为 $9 \\sqrt{3},$ 则三棱锥 D - ABC 体积的最大值为（  )", "options": "['$12 \\\\sqrt{3}$', '$18 \\\\sqrt{3}$', '$24 \\\\sqrt{3}$', '$54 \\\\sqrt{3}$']", "type": 6}
-{"stem": "设 $\\mathrm{F}_{1}, \\mathrm{F}_{2}$ 是双曲线 $\\mathrm{C}: \\frac{\\mathrm{x}^{2}}{\\mathrm{a}^{2}}-\\frac{\\mathrm{y}^{2}}{\\mathrm{b}^{2}}=1(\\mathrm{a}>0 . \\mathrm{b}>0)$ 的左，右焦点，O 是坐标原点.\n过$\\mathrm{F}_{2}$ 作 $\\mathrm{C}$ 的一条渐近线的垂线，垂足为 $\\mathrm{P},$ 若|PF $_{1}|=\\sqrt{6}| \\mathrm{OP} |$ ，则 $\\mathrm{C}$ 的离心率为\n(  )", "options": "['$\\\\sqrt{5}$', '2', '$\\\\sqrt{3}$', '$\\\\sqrt{2}$']", "type": 6}
-{"stem": "设 $a=\\log _{0.2} 0.3, \\quad b=\\log _{2} 0.3, \\quad$ 则$\\SIFChoice$", "options": "['$a+b<a b<0$', '$a b<a+b<0$', '$a+b<0<a b$', '$a b<0<a+b$']", "type": 6}
-{"stem": "已知向量 $\\vec{a}=(1,2), \\vec{b}=(2,-2), \\vec{c}=(1, \\lambda) .$ 若$\\overrightarrow{\\mathrm{c}} / /(2 \\overrightarrow{\\mathrm{a}}+\\overrightarrow{\\mathrm{b}})$则 $\\lambda=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "曲线$y=(a x+1) e^{x}$在点（0，1）处的切线的斜率为 - 2，则 a=", "options": "[]", "type": 2}
-{"stem": "函数 $f(x)=\\cos \\left(3 x+\\frac{\\pi}{6}\\right)$在$[0， \\pi]$的零点个数为", "options": "[]", "type": 2}
-{"stem": "已知点 M（-1，1）和抛物线 C: $y^{2 } =4 \\mathrm{x},$ 过 C 的焦点且斜率为 k 的直线与 C 交于A，B两点．若$\\angle \\mathrm{AMB}=90^{\\circ}$则k=", "options": "[]", "type": 2}
-{"stem": "等比数列 $\\left\\{a_{n}\\right\\}$ 中 $, \\quad a_{1}=1, \\quad a_{5}=4 a_{3}$求$\\left\\{a_{n}\\right\\}$的通项公式;记 Sn为$\\left\\{a_{n}\\right\\}$的前 n 项和。若 $S_{m} =63$，求 m.", "options": "[]", "type": 4}
-{"stem": "某工厂为提高生产效率，开展技术创新活动，提出了完成某项生产任务的两种新的生产方式．为比较两种生产方式的效率，选取40名工人，将他们随机分成两组，每组20人．第一组工人用第一种生产方式，第二组工人用第二种生产方式．根据工人完成生产任务的工作时间（单位：min）绘制了如下茎叶图：（1）根据茎叶图判断哪种生产方式的效率更高？并说明理由；（2）求40名工人完成生产任务所需时间的中位数m，并将完成生产任务所需时间超过m和不超过m的工人数填入下面的列联表：（3）根据（2）中的列联表，能否有99%的把握认为两种生产方式的效率有差异？附：$K^{2}=\\frac{n(a d-b c)^{2}}{(a+b)(c+d)(a+c)(b+d)}$\n", "options": "[]", "type": 4}
-{"stem": "如图，边长为2的正方形ABCD所在的平面与半圆弧$\\widehat{C D}$所在平面垂直，M是 $\\widehat{C D}$上异于C，D的点证明：平面AMD$\\perp$平面BMC；当三棱锥M﹣ABC体积最大时，求面MAB与面MCD所成二面角的正弦值．$\\FigureID{3bfac654-8af1-11eb-9dd8-b46bfc50aa29}$$\\FigureID{59c077e0-8af1-11eb-973e-b46bfc50aa29}$$\\FigureID{0895cbe0-8b7c-11eb-ac1a-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知斜率为 k 的直线$l$与椭圆 $C: \\frac{x^{2}}{4}+\\frac{y^{2}}{3}=1$ 交于 $A, \\quad B$ 两点，线段 $A B$ 的中点为$M(1, m)(m>0)$证明： $k<-\\frac{1}{2}$设F为C的右焦点，P为C上一点，且$\\overrightarrow{\\mathrm{FP}}+\\overrightarrow{\\mathrm{FA}}+\\overrightarrow{\\mathrm{FB}}=\\overrightarrow{0} . \\quad$ 证明 $: \\quad|\\overrightarrow{\\mathrm{FA}}|,|\\overrightarrow{\\mathrm{FP}}|,|\\overrightarrow{\\mathrm{FB}}|$成等差数列，并求该数列的公差．", "options": "[]", "type": 4}
-{"stem": "已知函数 $ f(x)=\\left(2+x+a x^{2}\\right) \\ln (1+x)-2 x$若 $a=0,$ 证明: 当$-1<x<0$ 时 $, f(x)<0 ;$ 当 $x>0$ 时, $f(x)>0$若 x=0 是 f（x）的极大值点，求 a.", "options": "[]", "type": 4}
-{"stem": "在平面直角坐标系 xOy 中， $\\odot O$的参数方程为 $\\left\\{\\begin{array}{l}\\mathrm{x}=\\cos \\theta \\ y=\\sin \\theta\\end{array},(\\theta \\text { 为参数 }), \\text { 过点 }(0,\\right.$ $- \\sqrt2$）且倾斜角为$ \\alpha$ 的直线$l$与$\\odot O$ 交于 A，B 两点。求α的取值范围；求AB中点P的轨迹的参数方程．", "options": "[]", "type": 4}
-{"stem": "设函数 f $(x)=|2 x+1|+|x-1|$\n\n画出 y=f（x）的图象;当 $\\mathrm{x} \\in[0,+\\infty)$ 时, $f(\\mathrm{x}) \\leqslant \\mathrm{ax}+\\mathrm{b}, \\quad$ 求 $\\mathrm{a}+\\mathrm{b}$ 的最小值.$\\FigureID{3bfaed54-8af1-11eb-8cf9-b46bfc50aa29}$$\\FigureID{59c077e1-8af1-11eb-a4ea-b46bfc50aa29}$$\\FigureID{0895cbe1-8b7c-11eb-b7ae-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "已知集合$A=\\{-1,0,1,2\\}$，$B=\\left\\{x | x^{2} \\leq 1\\right\\}$，则$A \\cap B=$", "options": "['$\\\\{-1,0,1\\\\}$', '$\\\\{0,1\\\\}$', '$\\\\{-1,1\\\\}$', '$\\\\{0,1,2\\\\}$']", "type": 6}
-{"stem": "若$z(1+i)=2 i$，则z=", "options": "['$-1-i$', '$-1+i$', '$1-i$', '$1+i$']", "type": 6}
-{"stem": "《西游记》《三国演义》《水浒传》和《红楼梦》是中国古典文学瑰宝，并称为中国古典小说四大名著.某中学为了解本校学生阅读四大名著的情况，随机调查了100学生，其中阅读过《西游记》或《红楼梦》的学生共有90位，阅读过《红楼梦》的学生共有80位，阅读过《西游记》且阅读过《红楼梦》的学生共有60位，则该校阅读过《西游记》的学生人数与该校学生总数比值的估计值为（  ）", "options": "['0.5', '0.6', '0.7', '0.8']", "type": 6}
-{"stem": "$\\left(1+2 x^{2}\\right)(1+x)^{4}$的展开式中$x^{3}$的系数为", "options": "{'1': '6', '2': '4'}", "type": 6}
-{"stem": "已知各项均为正数的等比数列$\\left\\{a_{n}\\right\\}$的前4项和为15，且$a_{s}=3 a_{3}+4 a_{1}$，则$a_{3}=$（  ）", "options": "['16', '8', '4', '2']", "type": 6}
-{"stem": "已知曲线$y=a e^{x}+x \\ln x$在点$(1, a e)$处的切线方程为$y=2 x+b$，则$\\SIFChoice$", "options": "['$a=e, b=-1$', '$a=e, b=1$', '$a=e^{-1}, b=1$', '$a=e^{-1}, b=-1$']", "type": 6}
-{"stem": "函数$y=\\frac{2 x^{3}}{2^{x}+2^{-x}}$在[-6,6]的图像大致为", "options": "['$\\\\LUNAPictureID{3bffc4ba-8af1-11eb-aa38-b46bfc50aa29}$$\\\\LUNAPictureID{59c5627a-8af1-11eb-a7b3-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e4-8b7c-11eb-bbcc-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bffc4bb-8af1-11eb-a7ac-b46bfc50aa29}$$\\\\LUNAPictureID{59c5627b-8af1-11eb-9780-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e5-8b7c-11eb-9ebc-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bffebba-8af1-11eb-b19d-b46bfc50aa29}$$\\\\LUNAPictureID{59c5627c-8af1-11eb-b38e-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e6-8b7c-11eb-b809-b46bfc50aa29}$', '$\\\\LUNAPictureID{3bffebbb-8af1-11eb-9031-b46bfc50aa29}$$\\\\LUNAPictureID{59c5627d-8af1-11eb-9e6e-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e7-8b7c-11eb-b54d-b46bfc50aa29}$']", "type": 6}
-{"stem": "如图，点$N$为正方形$ABCD$的中心，$\\Delta E C D$为正三角形，平面$E C D \\perp$平面$ABCD,M$是线段$ED$的中点，则$\\SIFChoice$$\\FigureID{3bfaed55-8af1-11eb-9d26-b46bfc50aa29}$$\\FigureID{59c0a16c-8af1-11eb-bf73-b46bfc50aa29}$$\\FigureID{0895cbe2-8b7c-11eb-8a71-b46bfc50aa29}$", "options": "['BM=EN，且直线BM、EN 是相交直线', 'BM≠EN，且直线BM，EN 是相交直线', 'BM=EN，且直线BM、EN 是异面直线', 'BM≠EN，且直线BM，EN 是异面直线']", "type": 6}
-{"stem": "执行如图所示的程序框图，如果输入的$\\varepsilon$为0.01，则输出的值等于$s$$\\FigureID{3bfb146c-8af1-11eb-8739-b46bfc50aa29}$$\\FigureID{59c0a16d-8af1-11eb-8db7-b46bfc50aa29}$$\\FigureID{0895cbe3-8b7c-11eb-bc90-b46bfc50aa29}$", "options": "['$2-\\\\frac{1}{2^{4}}$', '$2-\\\\frac{1}{2^{5}}$', '$2-\\\\frac{1}{2^{6}}$', '$2-\\\\frac{1}{2^{7}}$']", "type": 6}
-{"stem": "双曲线$c: \\frac{x^{2}}{4}-\\frac{y^{2}}{2}=1$的右焦点为F，点P在C的一条渐近线上，O为坐标原点，若$|P O|=|P F|$，则$\\triangle P F O$的面积为", "options": "['$\\\\frac{3 \\\\sqrt{2}}{4}$', '$\\\\frac{3 \\\\sqrt{2}}{2}$', '$\\\\frac{x_{1}}{x_{2}}$', '$3 \\\\sqrt{2}$']", "type": 6}
-{"stem": "设$f(x)$是定义域为R的偶函数，且在$(0,+\\infty)$单调递减，则", "options": "['$f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)>f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)>f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)$', '$f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)>f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)>f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)$', '$f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)>f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)>f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)$', '$f\\\\left(2^{-\\\\frac{2}{3}}\\\\right)>f\\\\left(2^{-\\\\frac{3}{2}}\\\\right)>f\\\\left(\\\\log _{3} \\\\frac{1}{4}\\\\right)$']", "type": 6}
-{"stem": "设函数$f(x)=\\sin \\left(\\omega x+\\frac{\\pi}{5}\\right)(\\omega>0)$，已知$f(x)$在$[0,2 \\pi]$有且仅有5个零点，下述四个结论：\n①$f(x)$在$(0,2 \\pi)$有且仅有3个极大值点\n②$f(x)$在$(0,2 \\pi)$有且仅有2个极小值点\n③$f(x)$在$\\left(0, \\frac{\\pi}{10}\\right)$单调递增\n④的取值范围是$\\left[\\frac{12}{5}, \\frac{29}{10}\\right)$\n其中所有正确结论的编号是", "options": "['①④', '②③', '①②③', '①③④']", "type": 6}
-{"stem": "已知a，b为单位向量，且a·b=0，若$c=2 a-\\sqrt{5} b$，则$\\cos <\\vec{a}, \\vec{c}>=$___________.", "options": "[]", "type": 2}
-{"stem": "记$S_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前n项和，$a_{1} \\neq 0, \\quad a_{2}=3 a_{1}$，则$\\frac{S_{10}}{S_{5}}=$___________.", "options": "[]", "type": 2}
-{"stem": "设$F_{1}, F_{2}$为椭圆$C: \\frac{x^{2}}{36}+\\frac{y^{2}}{20}=1$的两个焦点，$M$为$C$上一点且在第一象限.若$\\Delta M F_{1} F_{2}$为等腰三角形，则$M$的坐标为$\\SIFBlank$.", "options": "[]", "type": 2}
-{"stem": "学生到工厂劳动实践，利用$3 D$打印技术制作模型.如图，该模型为长方体$A B C D-A_{1} B C_{1} D_{1}$挖去四棱锥$O-E F G H$后所得的几何体，其中$O$为长方体的中心，$E, F, G, H$分别为所在棱的中点，$A B=B C=6 \\mathrm{cm}, A A_{1}=4 \\mathrm{cm}$，$3 D$打印所用原料密度为$0.9 g / c m^{3}$，不考虑打印损耗，制作该模型所需原料的质量为$\\SIFBlank$$g$.$\\FigureID{3bfb146d-8af1-11eb-8ce7-b46bfc50aa29}$$\\FigureID{59c0c89a-8af1-11eb-8d7a-b46bfc50aa29}$$\\FigureID{0895cbe4-8b7c-11eb-8c89-b46bfc50aa29}$", "options": "[]", "type": 2}
-{"stem": "(必考题)为了解甲、乙两种离子在小鼠体内的残留程度，进行如下试验：将200只小鼠随机分成$A, B$两组，每组100只，其中$A$组小鼠给服甲离子溶液，$B$组小鼠给服乙离子溶液.每只小鼠给服的溶液体积相同、摩尔浓度相同.经过一段时间后用某种科学方法测算出残留在小鼠体内离子的百分比.根据试验数据分别得到如下直方图：\n记$C$为事件：“乙离子残留在体内的百分比不低于$5.5$”，根据直方图得到$P(C)$的估计值为$0.70$.求乙离子残留百分比直方图中$a,b$的值；分别估计甲、乙离子残留百分比的平均值（同一组中的数据用该组区间的中点值为代表）.$\\FigureID{3bfb3b80-8af1-11eb-bb30-b46bfc50aa29}$$\\FigureID{59c0c89b-8af1-11eb-b816-b46bfc50aa29}$$\\FigureID{0895cbe5-8b7c-11eb-88dc-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "(必考题)$\\Delta A B C$的内角$A, B, C$的对边分别为$a, b, c$，已知$a \\sin \\frac{A+C}{2}=b \\sin A$．求$B$；若$\\Delta A B C$为锐角三角形，且$c=1$，求$\\Delta A B C$面积的取值范围．", "options": "[]", "type": 4}
-{"stem": "(必考题)图1是由矩形$A D E B, Rt \\Delta A B C$和菱形$BFGC$组成的一个平面图形，其中$A B=1, B E=B F=2$，$\\angle F B C=60^{\\circ}$，将其沿$A B, B C$折起使得$BE$与$BF$重合，连结$DG$，如图2.证明：图2中的四点$A,C,G,D$共面，且平面$A B C \\perp$平面$BCGE$；求图2中的二面角B−CG−A的大小.$\\FigureID{3bfb46f0-8af1-11eb-bad2-b46bfc50aa29}$$\\FigureID{59c0efba-8af1-11eb-8332-b46bfc50aa29}$$\\FigureID{0895cbe6-8b7c-11eb-aef4-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "(必考题)已知函数$f(x)=2 x^{3}-a x^{2}+b$.讨论$f(x)$的单调性；是否存在$a,b$，使得$f(x)$在区间[0,1]最小值为-1且最大值为1？若存在，求出$a,b$的所有值；若不存在，说明理由.", "options": "[]", "type": 4}
-{"stem": "(必考题)已知曲线$C: y=\\frac{x^{2}}{2}, D$为直线$y=-\\frac{1}{2}$上的动点，过$D$作$C$的两条切线，切点分别为$A,B$.证明：直线$AB$过定点若以$E\\left(0, \\frac{5}{2}\\right)$为圆心的圆与直线$AB$相切，且切点为线段$AB$的中点，求四边形ADBE的面积.", "options": "[]", "type": 4}
-{"stem": "(选修4-4：坐标系与参数方程)如图，在极坐标系$O x$中，$A(2,0)$，$B\\left(\\sqrt{2}, \\frac{\\pi}{4}\\right)$，$C\\left(\\sqrt{2}, \\frac{3 \\pi}{4}\\right)$，$D(2, \\pi)$，弧$\\widehat{A B}$，$\\widehat{B C}$，$\\widehat{C D}$所在圆的圆心分别是(1,0)，$\\left(1, \\frac{\\pi}{2}\\right)$，$(1, \\pi)$，曲线$M_{1}$是弧$\\widehat{A B}$，曲线$M_{2}$是弧$\\widehat{B C}$，曲线$M_{3}$是弧$\\widehat{C D}$.分别写出$M_{1}$，$M_{2}$，$M_{3}$的极坐标方程；曲线$M$由$M_{1}$，$M_{2}$，$M_{3}$构成，若点$P$在$M$上，且$|O P|=\\sqrt{3}$，求$P$极坐标.$\\FigureID{3bfb46f1-8af1-11eb-8de7-b46bfc50aa29}$$\\FigureID{59c0efbb-8af1-11eb-8741-b46bfc50aa29}$$\\FigureID{0895cbe7-8b7c-11eb-b1e7-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "(选修4-5：不等式选讲)设$x, y, z \\in R$，且$x+y+z=1$.求$(x-1)^{2}+(y+1)^{2}+(z+1)^{2}$的最小值；若$(x-2)^{2}+(y-1)^{2}+(z-a)^{2} \\geq \\frac{1}{3}$成立，证明：$a \\leq-3$或$a \\geq-1$.", "options": "[]", "type": 4}
-{"stem": "已知集合A={﹣2，﹣1，0，1，2}，B={x|(x﹣1)(x+2)＜0}，则$A \\cap B=(\\quad)$", "options": "['{﹣1，0}', '{0，1}', '{﹣1，0，1}', '{0，1，2}\\t']", "type": 6}
-{"stem": "若$a$为实数，且$(2+a i)(a-2 i)=-4 i$，则$a$=（　　）", "options": "['﹣1', '0', '1', '2']", "type": 6}
-{"stem": "根据如图给出的2004年至2013年我国二氧化硫年排放量（单位：万吨）柱形图，以下结论中不正确的是（　　）$\\FigureID{3bfb46f2-8af1-11eb-9df1-b46bfc50aa29}$$\\FigureID{59c0efbc-8af1-11eb-b081-b46bfc50aa29}$$\\FigureID{0895cbe8-8b7c-11eb-954d-b46bfc50aa29}$", "options": "['逐年比较，2008年减少二氧化硫排放量的效果最显著', '2007年我国治理二氧化硫排放显现成效', '2006年以来我国二氧化硫年排放量呈减少趋势', '2006年以来我国二氧化硫年排放量与年份正相关']", "type": 6}
-{"stem": "已知等比数列$\\left\\{a_{n}\\right\\}$满足$a_{1}=3, \\quad a_{1}+a_{3}+a_{5}=21$，则$a_{3}+a_{5}+a_{7}=$（　　）", "options": "['21', '42', '63', '84\\t']", "type": 6}
-{"stem": "设函数$f(x)=\\left\\{\\begin{array}{ll}1+\\log _{2}(2-x), & x<1 \\ 2^{x-1}, & x \\geqslant 1\\end{array}\\right.$，则$f(-2)+f\\left(\\log _{2} 12\\right)=$（　　）", "options": "['3', '6', '9', '12']", "type": 6}
-{"stem": "一个正方体被一个平面截去一部分后，剩余部分的三视图如图，则截去部分体积与剩余部分体积的比值为（　　）$\\FigureID{3bfb46f3-8af1-11eb-99b7-b46bfc50aa29}$$\\FigureID{59c116c6-8af1-11eb-882c-b46bfc50aa29}$$\\FigureID{0895cbe9-8b7c-11eb-978a-b46bfc50aa29}$", "options": "['$\\\\frac{1}{8}$\\n\\n', '$\\\\frac{1}{7}$\\n\\n', '$\\\\frac{1}{6}$\\n\\n', '$\\\\frac{1}{5}$\\n\\n']", "type": 6}
-{"stem": "7．（5分）过三点A（1，3），B（4，2），C（1，﹣7）的圆交y轴于M，N两点，则$|MN|$=（　　）", "options": "['$2 \\\\sqrt{6}$', '8', '$4 \\\\sqrt{6}$', '10']", "type": 6}
-{"stem": "程序框图的算法思路源于我国古代数学名著《九章算术》中的“更相减损术”，执行该程序框图，若输入的a，b分别为14，18，则输出的a=（　　）$\\FigureID{3bfb6e00-8af1-11eb-94df-b46bfc50aa29}$$\\FigureID{59c116c7-8af1-11eb-ade8-b46bfc50aa29}$$\\FigureID{0895cbea-8b7c-11eb-9935-b46bfc50aa29}$", "options": "['0', '2', '4', '14\\t']", "type": 6}
-{"stem": "已知A，B是球O的球面上两点，$\\angle AOB=90^{\\circ}$，C为该球面上的动点，若三棱锥O﹣ABC体积的最大值为36，则球O的表面积为（　　）", "options": "['$36\\\\pi $', '$64\\\\pi $', '$144\\\\pi $', '$256\\\\pi $']", "type": 6}
-{"stem": "如图，长方形ABCD的边AB=2，BC=1，O是AB的中点，点P沿着边BC，CD与DA运动，记$\\angle BOP=x$,将动点P到A，B两点距离之和表示为x的函数$f(x)$，则$y=f(x)$的图象大致为（　　）$\\FigureID{3bfb6e01-8af1-11eb-a86c-b46bfc50aa29}$$\\FigureID{59c116c8-8af1-11eb-bc3b-b46bfc50aa29}$$\\FigureID{0895cbeb-8b7c-11eb-827a-b46bfc50aa29}$", "options": "['$\\\\LUNAPictureID{3c0000cc-8af1-11eb-b0a2-b46bfc50aa29}$$\\\\LUNAPictureID{59c5898c-8af1-11eb-a3f5-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e8-8b7c-11eb-9342-b46bfc50aa29}$', '$\\\\LUNAPictureID{3c002818-8af1-11eb-9747-b46bfc50aa29}$$\\\\LUNAPictureID{59c5898d-8af1-11eb-9a04-b46bfc50aa29}$$\\\\LUNAPictureID{089a10e9-8b7c-11eb-9d70-b46bfc50aa29}$', '$\\\\LUNAPictureID{3c002819-8af1-11eb-8230-b46bfc50aa29}$$\\\\LUNAPictureID{59c5898e-8af1-11eb-8f01-b46bfc50aa29}$$\\\\LUNAPictureID{089a10ea-8b7c-11eb-a301-b46bfc50aa29}$', '$\\\\LUNAPictureID{3c00281a-8af1-11eb-af6a-b46bfc50aa29}$$\\\\LUNAPictureID{59c5898f-8af1-11eb-b112-b46bfc50aa29}$$\\\\LUNAPictureID{089a10eb-8b7c-11eb-a260-b46bfc50aa29}$']", "type": 6}
-{"stem": "已知A，B为双曲线E的左，右顶点，点M在E上，$\\triangle \\mathrm{ABM}$为等腰三角形，顶角为120°，则E的离心率为（　　）", "options": "['$\\\\sqrt{5}$', '2', '$\\\\sqrt{3}$', '$\\\\sqrt{2}$']", "type": 6}
-{"stem": "设函数$f^{\\prime}(x)$是奇函数$f(x) \\quad(x \\in R)$的导函数，$f(-1)=0$，当$x＞0$时，$x f^{\\prime}(x)-f(x)<0$，则使得$f(x)>0$成立的x的取值范围是（　　）", "options": "['$(-\\\\infty,-1) \\\\cup(0,1)$', '$(-1,0) \\\\cup (1,+\\\\infty)$', '$(-\\\\infty,-1) \\\\cup(-1,0)$', '$(0,1) \\\\cup (1,+\\\\infty)$']", "type": 6}
-{"stem": "设向量$\\vec{a}$，$\\vec{b}$不平行，向量$\\lambda \\vec{a}+\\vec{b}$与$ \\vec{a}+2 \\vec{b}$平行，则实数$\\lambda $=_______.", "options": "[]", "type": 2}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x-y+1 \\geqslant 0 \\ x-2 y \\leq 0 \\ x+2 y-2 \\leq 0\\end{array}\\right.$，则z=x+y的最大值为_______.", "options": "[]", "type": 2}
-{"stem": "$(a+x)(1+x)^{4}$的展开式中x的奇数次幂项的系数之和为32，则a=_______", "options": "[]", "type": 2}
-{"stem": "设数列$\\left\\{a_{n}\\right\\}$的前n项和为$S_{n}$，且$a_{1}=-1$，$ a_{n+1}=S_{n+1} S_{n}$，则$S_{n}=$_______", "options": "[]", "type": 2}
-{"stem": "$\\triangle A B C$中，$D$是$BC$上的点，$AD$平分$\\angle \\mathrm{BAC}$,$ \\triangle \\mathrm{ABD}$面积是$\\triangle \\mathrm{ADC}$面积的2倍．求$\\frac{\\sin \\angle B}{\\sin \\angle C}$若$\\mathrm{AD}=1$，$\\mathrm{DC}=\\frac{\\sqrt{2}}{2}$，求$BD$和$AC$的长", "options": "[]", "type": 4}
-{"stem": "某公司为了解用户对其产品的满意度，从A，B两地区分别随机调查了20个用户，得到用户对产品的满意度评分如下：\nA地区：62  73  81  92  95  85  74  64  53  76\n      78  86  95  66  97  78  88  82  76  89\nB地区：73  83  62  51  91  46  53  73  64  82\n      93  48  65  81  74  56  54  76  65  79根据两组数据完成两地区用户满意度评分的茎叶图，并通过茎叶图比较两地区满意度评分的平均值及分散程度（不要求计算出具体值，给出结论即可）根据用户满意度评分，将用户的满意度从低到高分为三个等级：\n\n\n记事件C：“A地区用户的满意度等级高于B地区用户的满意度等级”，假设两地区用户的评价结果相互独立，根据所给数据，以事件发生的频率作为相应事件发生的概率，求C的概率．", "options": "[]", "type": 4}
-{"stem": "如图，长方体$\\mathrm{ABCD}-\\mathrm{A}_{1} \\mathrm{B}_{1} \\mathrm{C}_{1} \\mathrm{D}_{1}$中，$AB=16$，$BC=10$，$\\mathrm{AA}_{1}=8$，点$E，F$分别在$A_{1} B_{1}$，$D_{1} C_{1}$上，$A_{1} E=D_{1} F=4$，过点$E，F$的平面$\\alpha$与此长方体的面相交，交线围成一个正方形．在图中画出这个正方形（不必说明画法和理由）；求直线$AF$与平面$\\alpha$所成角的正弦值．\n", "options": "[]", "type": 4}
-{"stem": "已知椭圆C：$9 x^{2}+y^{2}=m^{2}(m>0)$，直线l不过原点O且不平行于坐标轴，l与C有两个交点A，B，线段AB的中点为M．证明：直线OM的斜率与l的斜率的乘积为定值；若l过点$\\left(\\frac{m}{3}, m\\right)$延长线段OM与C交于点P，四边形OAPB能否为平行四边形？若能，求此时l的斜率；若不能，说明理由．\n", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=e^{m x}+x^{2}-m x$证明：$f(x)$ 在 $(-\\infty, 0)$ 单调递减，在 $(0，+\\infty)$单调递增若对于任意$x_{1}, \\quad x_{2} \\in[-1, \\quad 1]$，都有$|f\\left(x_{1}\\right)-f\\left(x_{2}\\right) | \\leq e-1$，求m的取值范围．", "options": "[]", "type": 4}
-{"stem": "如图，$O$为等腰三角形$ABC$内一点，$\\odot O$与$\\triangle \\mathrm{ABC}$的底边$BC$交于$M$，$N$两点，与底边上的高$AD$交于点$G$，且与$AB$，$AC$分别相切于$E$，$F$两点．证明：$EF \\parallel BC$；若$AG$等于$\\odot O$的半径，且$AE=MN=2 \\sqrt{3}$，求四边形$EBCF$的面积．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，曲线$C_{1}:\\left\\{\\begin{array}{l}x=t \\cos \\alpha \\ y=t \\sin \\alpha\\end{array}\\right.$（$t$为参数，$t \\neq 0$），其中$0 \\leq \\alpha \\leq \\pi$，在以$O$为极点，$x$轴正半轴为极轴的极坐标系中，曲线$C_{2}: \\rho=2 \\sin \\theta$，$C_{3}:  \\rho=2 \\sqrt{3} \\cos \\theta$.求$C_{2}$与$C_{3}$交点的直角坐标；若$C_{1}$与$C_{2}$相交于点$A$，$C_{1}$与$C_{3}$相交于点$B$，求$|AB|$的最大值．", "options": "[]", "type": 4}
-{"stem": "设$a$，$b$，$c$，$d$均为正数，且$a+b=c+d$，证明：若$ab＞cd$，则$\\sqrt{a}+\\sqrt{b}>\\sqrt{c}+\\sqrt{d}$$\\sqrt{a}+\\sqrt{b}>\\sqrt{c}+\\sqrt{d}$是$|a-b|<|c-d|$的充要条件．", "options": "[]", "type": 4}
-{"stem": "已知$z=(m+3)+(m-1)i$在复平面内对应的点在第四象限，则实数m的取值范围是（　　）", "options": "['$(﹣3，1)$', '$(﹣1，3)$', '$(1,+\\\\infty)$', '$(-\\\\infty,-3)$']", "type": 6}
-{"stem": "已知集合$A$={1，2，3}，$B=\\{x| (x+1)(x-2)<0, x \\in Z\\}$，则 $A \\cup B$等于（　　）", "options": "['{1}', '{1，2}', '{0，1，2，3}\\t', '{﹣1，0，1，2，3}\\t']", "type": 6}
-{"stem": "已知向量$\\vec{\\mathrm{a}}=(1, m)$，$\\vec{b}=(3,-2)$，且$(\\vec{\\mathrm{a}}+\\vec{b}) \\perp \\vec{b}$，则$m$ =（　　）", "options": "['﹣8', '﹣6', '6', '8']", "type": 6}
-{"stem": "圆$x^{2}+y^{2}-2 x-8 y+13=0$的圆心到直线$\\mathrm{a}x+y-1=0$的距离为1，则$\\mathrm{a}$ = （　　）", "options": "['$-\\\\frac{4}{3}$\\n\\n', '$-\\\\frac{3}{4}$\\n\\n', '$\\\\sqrt{3}$\\n\\n', '$2$']", "type": 6}
-{"stem": "如图，小明从街道的E处出发，先到F处与小红会合，再一起到位于G处的老年公寓参加志愿者活动，则小明到老年公寓可以选择的最短路径条数为（　　）$\\FigureID{3bfb83ac-8af1-11eb-beb8-b46bfc50aa29}$$\\FigureID{59c116c9-8af1-11eb-acbd-b46bfc50aa29}$$\\FigureID{0895cbec-8b7c-11eb-8c46-b46bfc50aa29}$", "options": "['24', '18', '12', '9']", "type": 6}
-{"stem": "如图是由圆柱与圆锥组合而成的几何体的三视图，则该几何体的表面积为（　　）$\\FigureID{3bfb83ad-8af1-11eb-9a90-b46bfc50aa29}$$\\FigureID{59c13dee-8af1-11eb-a37c-b46bfc50aa29}$$\\FigureID{0895cbed-8b7c-11eb-9030-b46bfc50aa29}$", "options": "['$20 \\\\pi$', '$24 \\\\pi$', '$28 \\\\pi$', '$32 \\\\pi$']", "type": 6}
-{"stem": "若将函数$y=2 \\sin 2 x$的图象向左平移$\\frac{\\pi}{12}$个单位长度，则平移后的图象的对称轴为（　　）", "options": "['$x=\\\\frac{k \\\\pi}{2}-\\\\frac{\\\\pi}{6}(k \\\\in \\\\mathbf{Z})$', '$x=\\\\frac{k \\\\pi}{2}+\\\\frac{\\\\pi}{6}(k \\\\in \\\\mathbf{Z})$', '$x=\\\\frac{k \\\\pi}{2}-\\\\frac{\\\\pi}{12}(k \\\\in \\\\mathbf{Z})$', '$x=\\\\frac{k \\\\pi}{2}+\\\\frac{\\\\pi}{12}(k \\\\in \\\\mathbf{Z})$']", "type": 6}
-{"stem": "中国古代有计算多项式值的秦九韶算法，如图是实现该算法的程序框图．执行该程序框图，若输入的x=2，n=2，依次输入的a为2，2，5，则输出的s=（　　）$\\FigureID{3bfb83ae-8af1-11eb-94d9-b46bfc50aa29}$$\\FigureID{59c13def-8af1-11eb-885c-b46bfc50aa29}$$\\FigureID{08966a7e-8b7c-11eb-9ce0-b46bfc50aa29}$", "options": "['7', '12', '17', '34']", "type": 6}
-{"stem": "若$\\cos \\left(\\frac{\\pi}{4}-\\alpha\\right)=\\frac{3}{5}$，则$\\sin 2 \\alpha$ =（　　）", "options": "['$\\\\frac{7}{25}$\\n\\n', '$\\\\frac{1}{5}$\\n\\n', '$-\\\\frac{1}{5}$\\n\\n', '$-\\\\frac{7}{25}$\\n\\n']", "type": 6}
-{"stem": "从区间[0，1]随机抽取2n个数$x_{1}, x_{2}, \\ldots, x_{n}, y_{1}, y_{2}, \\ldots, y_{n}$构成n个数对$\\left(x_{1}, y_{1}\\right), \\quad\\left(x_{2}, y_{2}\\right), \\ldots,\\left(x_{n}, y_{n}\\right)$，其中两数的平方和小于1的数对共有m个，则用随机模拟的方法得到的圆周率$\\pi$的近似值为（　　）", "options": "['$\\\\frac{4 n}{m}$\\n\\n', '$\\\\frac{2 n}{m}$\\n\\n', '$\\\\frac{4 m}{n}$\\n\\n', '$\\\\frac{2m}{n}$\\n\\n']", "type": 6}
-{"stem": "已知$\\mathrm{F}_{1}, \\mathrm{F}_{2}$是双曲线$E:\\frac{x^{2}}{\\mathrm{a}^{2}}-\\frac{y^{2}}{b^{2}}=1$的左，右焦点，点$M$在$E$上，$M F_{1}$与$x$轴垂直，$\\sin \\angle M F_{2} F_{1}=\\frac{1}{3}$，则$E$的离心率为（　　）", "options": "['$\\\\sqrt{2}$\\n\\n', '$\\\\frac{3}{2}$\\n\\n', '$\\\\sqrt{3}$\\n\\n', '$2$\\n\\n']", "type": 6}
-{"stem": "已知函数$f(x)(x \\in \\mathbf{R})$满足$f(-x)=2-f(x)$，若函数$y=\\frac{x+1}{x}$ 与 $y=f(x)$图象的交点为$\\left(x_{1}, y_{1}\\right), \\quad\\left(x_{2}, y_{2}\\right), \\dots,\\left(x_{m}, y_{m}\\right)$，则$\\sum_{i=1}^{m}\\left(x_{i}+y_{i}\\right)$=（　　）", "options": "['0', 'm', '2m', '4m']", "type": 6}
-{"stem": "$\\triangle ABC$的内角A，B，C的对边分别为a，b，c，若$\\cos A=\\frac{4}{5}$，$\\cos C=\\frac{5}{13}$，a=1，则b=_______.", "options": "[]", "type": 2}
-{"stem": "$\\alpha, \\beta$是两个平面，m，n是两条直线，有下列四个命题：\n①如果$m \\perp n$，$m \\perp \\alpha$，$ n \\parallel  \\beta$，那么$\\alpha \\perp \\beta$.\n②如果 $m \\perp \\alpha$，  $n \\parallel \\alpha$ ，那么 $m \\perp n$.\n③如果$\\alpha \\parallel \\beta$， $ m \\subset \\alpha$， 那么 $m  \\parallel \\beta$.\n④如果$m \\parallel n$，$\\alpha \\parallel \\beta$，那么m与$\\alpha$所成的角和n与$\\beta$所成的角相等．\n其中正确的命题是_______（填序号）.", "options": "[]", "type": 2}
-{"stem": "有三张卡片，分别写有1和2，1和3，2和3．甲，乙，丙三人各取走一张卡片，甲看了乙的卡片后说：“我与乙的卡片上相同的数字不是2”，乙看了丙的卡片后说：“我与丙的卡片上相同的数字不是1”，丙说：“我的卡片上的数字之和不是5”，则甲的卡片上的数字是_______", "options": "[]", "type": 2}
-{"stem": "若直线$y=k x+b$是曲线$y=\\ln x+2$的切线，也是曲线$y=\\ln (x+1)$的切线，则b=_______", "options": "[]", "type": 2}
-{"stem": "$S_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前n项和，且$a_{1}=1$，$S_{7}=28$，记 $b_{n}=\\left[\\lg a_{n}\\right]$，其中$[x]$表示不超过$x$的最大整数，如$[0.9]=0$，$[\\lg 99]=1$．求$b_{1}$，$b_{11}$，$b_{101}$；求数列$\\left\\{b_{n}\\right\\}$的前1000项和．", "options": "[]", "type": 4}
-{"stem": "某保险的基本保费为a（单位：元），继续购买该保险的投保人成为续保人，续保人本年度的保费与其上年度出险次数的关联如下：\n\n设该险种一续保人一年内出险次数与相应概率如下：\n\n求一续保人本年度的保费高于基本保费的概率；若一续保人本年度的保费高于基本保费，求其保费比基本保费高出60%的概率；求续保人本年度的平均保费与基本保费的比值．", "options": "[]", "type": 4}
-{"stem": "菱形$ABCD$的对角线$AC$与$BD$交于点$O$，$AB$=5，$AC$=6，点$E$，$F$分别在$AD$，$CD$上，$A E=C F=\\frac{5}{4}$，$EF$交于$BD$于点$H$，将$\\triangle D E F$沿$EF$折到$\\triangle D^{\\prime} E F$的位置，$O D^{\\prime}=\\sqrt{10}$.证明：$D^{\\prime}H \\perp$平面$ABCD$；求二面角$B-D^{\\prime} A-C$的正弦值．", "options": "[]", "type": 4}
-{"stem": "已知椭圆$E$：$\\frac{x^{2}}{t} + \\frac{y^{2}}{3} = 1$的焦点在$x$轴上，$A$是$E$的左顶点，斜率为$k(k＞0)$的直线交$E$于$A$，$M$两点，点$N$在$E$上，$MA \\perp NA$．当$t=4$，$|AM|=|AN|$时，求$\\triangle AMN$的面积；当$2|AM|=|AN|$时，求$k$的取值范围．", "options": "[]", "type": 4}
-{"stem": "讨论函数$f(x)=\\frac{x-2}{x+2} e^{x}$的单调性，并证明当$x＞0$时，$(x-2) e^{x}+x+2>0$；证明：当$a \\in[0,1)$时，函数$g(x)=\\frac{e^{x}-a x-a}{x^{2}} \\quad(x>0)$有最小值．设$g(x)$的最小值为$h(a)$，求函数$h(a)$的值域．", "options": "[]", "type": 4}
-{"stem": "如图，在正方形$ABCD$中，$E$，$G$分别在边$DA$，$DC$上（不与端点重合），且$DE=DG$，过$D$点作$DF \\perp CE$，垂足为$F$．证明：$B$，$C$，$G$，$F$四点共圆；若$AB=1$，$E$为$DA$的中点，求四边形$BCGF$的面积．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，圆$C$的方程为$(x+6)^{2}+y^{2}=25$.以坐标原点为极点，$x$轴正半轴为极轴建立极坐标系，求$C$的极坐标方程；直线$l$的参数方程是$\\left\\{\\begin{array}{l}x=t \\cos \\alpha \\ y=t \\sin \\alpha\\end{array}\\right.$（$t$为参数），$l$与$C$交与$A$，$B$两点，$|A B|=\\sqrt{10}$，求$l$的斜率．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\left|x-\\frac{1}{2}\\right|+\\left|x+\\frac{1}{2}\\right|$，$M$为不等式$f(x)＜2$的解集．求$M$；证明：当$a, b \\in M$时，$|a+b|＜|1+ab|$．", "options": "[]", "type": 4}
-{"stem": "$\\frac{3+i}{1+i}=$（　　）", "options": "['$1+2 i$', '$1-2 i$', '$2+i$', '$2-i$']", "type": 6}
-{"stem": "设集合$A=\\{1,2,4\\}, B=\\left\\{x | x^{2}-4 x+m=0\\right\\}$．若$A \\cap B=\\{1\\}$，则$B=$（　　）", "options": "['$\\\\{1,-3\\\\}$', '$\\\\{1,0\\\\}$', '$\\\\{1,3\\\\}$', '$\\\\{1,5\\\\}$']", "type": 6}
-{"stem": "我国古代数学名著《算法统宗》中有如下问题：“远看巍巍塔七层，红光点点倍加增，共灯三百八十一，请问尖头几盏灯？”意思是：一座7层塔共挂了381盏灯，且相邻两层中的下一层灯数是上一层灯数的2倍，则塔的顶层共有灯（　　）", "options": "['1盏', '3盏', '5盏', '9盏']", "type": 6}
-{"stem": "如图，网格纸上小正方形的边长为1，粗实线画出的是某几何体的三视图，该几何体由一平面将一圆柱截去一部分后所得，则该几何体的体积为（　　）$\\FigureID{3bfbaaca-8af1-11eb-afca-b46bfc50aa29}$$\\FigureID{59c13df0-8af1-11eb-98f4-b46bfc50aa29}$$\\FigureID{08966a7f-8b7c-11eb-9043-b46bfc50aa29}$", "options": "['90π', '63π', '42π', '36π']", "type": 6}
-{"stem": "设$x, y$满足约束条件$\\left\\{\\begin{array}{l}2 x+3 y-3<0 \\ 2 x-3 y+3>0 \\ y+3 \\geqslant 0\\end{array}\\right.$，则$z=2 x+y$的最小值是（　　）", "options": "['-15', '-9', '1', '9']", "type": 6}
-{"stem": "安排3名志愿者完成4项工作，每人至少完成1项，每项工作由1人完成，则不同的安排方式共有（　　）", "options": "['12种', '18种', '24种', '36种']", "type": 6}
-{"stem": "甲、乙、丙、丁四位同学一起去问老师询问成语竞赛的成绩．老师说：你们四人中有2位优秀，2位良好，我现在给甲看乙、丙的成绩，给乙看丙的成绩，给丁看甲的成绩．看后甲对大家说：我还是不知道我的成绩．根据以上信息，则（　　）", "options": "['乙可以知道四人的成绩', '丁可以知道四人的成绩', '乙、丁可以知道对方的成绩', '乙、丁可以知道自己的成绩\\t']", "type": 6}
-{"stem": "执行如图的程序框图，如果输入的$a=-1$，则输出的$S=$（　　）$\\FigureID{3bfbaacb-8af1-11eb-8c97-b46bfc50aa29}$$\\FigureID{59c16800-8af1-11eb-bbee-b46bfc50aa29}$$\\FigureID{08969218-8b7c-11eb-8790-b46bfc50aa29}$", "options": "['2', '3', '4', '5']", "type": 6}
-{"stem": "若双曲线$C: \\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, \\quad b>0)$的一条渐近线被圆$(x-2)^{2}+y^{2}=4$所截得的弦长为2，则C的离心率为（　　）", "options": "['$2$', '$\\\\sqrt{3}$', '$\\\\sqrt{2}$', '$\\\\frac{2 \\\\sqrt{3}}{3}$']", "type": 6}
-{"stem": "已知直三棱柱$\\mathrm{ABC}-\\mathrm{A}_{1} \\mathrm{B}_{1} \\mathrm{C}_{1}$中，$\\angle \\mathrm{ABC}=120^{\\circ}$，$A B=2$，$\\mathrm{BC}=\\mathrm{CC}_{1}=1$，则异面直线$\\mathrm{AB}_{1}$与$\\mathrm{BC}_{1}$所成角的余弦值为（　　）", "options": "['$\\\\frac{\\\\sqrt{3}}{2}$', '$\\\\frac{\\\\sqrt{15}}{5}$', '$\\\\frac{\\\\sqrt{10}}{5}$', '$\\\\frac{\\\\sqrt{3}}{3}$']", "type": 6}
-{"stem": "若$x=-2$是函数$f(x)=\\left(x^{2}+a x-1\\right) e^{x-1}$的极值点，则$f(x)$的极小值为（　　）", "options": "['$-1$', '$-2 e^{-3}$', '$5 e^{-3}$', '$1$']", "type": 6}
-{"stem": "已知$\\triangle A B C$是边长为2的等边三角形，P为平面ABC内一点，则$\\overrightarrow{\\mathrm{PA}} \\cdot(\\overrightarrow{\\mathrm{PB}}+\\overrightarrow{\\mathrm{PC}})$的最小值是（　　）", "options": "['$-2$', '$-\\\\frac{3}{2}$', '$-\\\\frac{4}{3}$', '$-1$']", "type": 6}
-{"stem": "一批产品的二等品率为0.02，从这批产品中每次随机取一件，有放回地抽取100次．$X$表示抽到的二等品件数，则$D X=$_______", "options": "[]", "type": 2}
-{"stem": "函数$f(x)=\\sin ^{2} x+\\sqrt{3} \\cos x-\\frac{3}{4}\\left(x \\in\\left[0, \\frac{\\pi}{2}\\right]\\right)$的最大值是$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "等差数列$\\left\\{a_{n}\\right\\}$的前n项和为$\\mathrm{S}_{n}, \\mathrm{a}_{3}=3, \\mathrm{S}_{4}=10$，$\\sum_{k=1}^{n} \\frac{1}{S_{k}}=$_______", "options": "[]", "type": 2}
-{"stem": "已知F是抛物线$\\mathrm{C}: \\mathrm{y}^{2}=8 \\mathrm{x}$的焦点，M是C上一点，FM的延长线交y轴于点N．若M为FN的中点，则|FN|=_______", "options": "[]", "type": 2}
-{"stem": "$\\triangle \\mathrm{ABC}$的内角A，B，C的对边分别为a，b，c，已知$\\sin (A+C)=8 \\sin ^{2} \\frac{B}{2}$．（1）求$\\cos B$；（2）若$a+c=6$，$\\triangle \\mathrm{ABC}$的面积为2，求b．", "options": "[]", "type": 4}
-{"stem": "海水养殖场进行某水产品的新、旧网箱养殖方法的产量对比，收获时各随机抽取了100个网箱，测量各箱水产品的产量（单位：kg），其频率分布直方图如图：（1）设两种养殖方法的箱产量相互独立，记A表示事件“旧养殖法的箱产量低于50kg，新养殖法的箱产量不低于50kg”，估计A的概率；（2）填写下面列联表，并根据列联表判断是否有99%的把握认为箱产量与养殖方法有关：（3）根据箱产量的频率分布直方图，求新养殖法箱产量的中位数的估计值（精确到0.01）．\n$\\mathrm{K}^{2}=\\frac{\\mathrm{n}(\\mathrm{ad}-\\mathrm{bc})^{2}}{(\\mathrm{a}+\\mathrm{b})(\\mathrm{c}+\\mathrm{d})(\\mathrm{a}+\\mathrm{c})(\\mathrm{b}+\\mathrm{d})}$.$\\FigureID{3bfbd1c8-8af1-11eb-aac6-b46bfc50aa29}$$\\FigureID{59c16801-8af1-11eb-98c3-b46bfc50aa29}$$\\FigureID{08969219-8b7c-11eb-afa0-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "如图，四棱锥P﹣ABCD中，侧面PAD为等边三角形且垂直于底面ABCD，$A B=B C=\\frac{1}{2} A D, \\quad \\angle B A D=\\angle A B C=90^{\\circ}$，E是PD的中点．（1）证明：直线$\\mathrm{CE} / / $平面$PAB$；（2）点$M$在棱$P C$上，且直线$BM$与底面$ABCD$所成角为45°，求二面角$\\mathrm{M}-\\mathrm{AB}-\\mathrm{D}$的余弦值．", "options": "[]", "type": 4}
-{"stem": "设O为坐标原点，动点M在椭圆$C: \\frac{x^{2}}{2}+y^{2}=1$上，过M作$x$轴的垂线，垂足为N，点P满足$\\overrightarrow{\\mathrm{NP}}=\\sqrt{2} \\overrightarrow{\\mathrm{NM}}$．（1）求点P的轨迹方程；（2）设点Q在直线$x=-3$上，且$\\overrightarrow{\\mathrm{OP}} \\cdot \\overrightarrow{\\mathrm{PQ}}=1$．证明：过点P且垂直于OQ的直线l过C的左焦点F．", "options": "[]", "type": 4}
-{"stem": "已知函数$(x)=a x^{2}-a x-x \\ln x$，且$f(x) \\geqslant 0$．（1）求$a$；（2）证明：$f(x)$存在唯一的极大值点$x_{0}$，且${e}^{-2}<{f}\\left({x}_{0}\\right)<2^{-2}$．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系xOy中，以坐标原点为极点，$x$轴的正半轴为极轴建立极坐标系，曲线$C_{1}$的极坐标方程为$p\\cos\\theta=4$．（1）M为曲线$\\mathrm{C}_{1}$上的动点，点P在线段OM上，且满足$|O M| \\cdot|O P|=16$，求点P的轨迹$\\mathrm{C}_{2}$的直角坐标方程；（2）设点A的极坐标为$\\left(2, \\frac{\\pi}{3}\\right)$，点B在曲线$\\mathrm{C}_{2}$上，求$\\triangle \\mathrm{OAB}$面积的最大值．", "options": "[]", "type": 4}
-{"stem": "已知$a>0, \\quad b>0, \\quad a^{3}+b^{3}=2$．证明：（1）$(a+b) \\left(a^{5}+b^{5}\\right) \\geqslant 4$；（2）$a+b \\leq 2$．", "options": "[]", "type": 4}
-{"stem": "$\\frac{1+2 i}{1-2 i}=$（　　）", "options": "['$-\\\\frac{4}{5}-\\\\frac{3}{5} i$', '$-\\\\frac{4}{5}+\\\\frac{3}{5} i$', '$-\\\\frac{3}{5}-\\\\frac{4}{5} i$', '$-\\\\frac{3}{5}+\\\\frac{4}{5} i$']", "type": 6}
-{"stem": "已知集合A={（x，y）|x2+y2≤3，x∈Z，y∈Z}，则A中元素的个数为（　　）", "options": "['9', '8', '5', '4']", "type": 6}
-{"stem": "函数$f(x)=\\frac{e^{x}-e^{-x}}{x^{2}}$的图象大致为（　　）", "options": "['$\\\\LUNAPictureID{3c0054ac-8af1-11eb-bd93-b46bfc50aa29}$$\\\\LUNAPictureID{59c5f0c8-8af1-11eb-8d12-b46bfc50aa29}$$\\\\LUNAPictureID{089a10ec-8b7c-11eb-9277-b46bfc50aa29}$', '$\\\\LUNAPictureID{3c0054ad-8af1-11eb-81cc-b46bfc50aa29}$$\\\\LUNAPictureID{59c5f0c9-8af1-11eb-943e-b46bfc50aa29}$$\\\\LUNAPictureID{089a10ed-8b7c-11eb-bf09-b46bfc50aa29}$', '$\\\\LUNAPictureID{3c0054ae-8af1-11eb-80d1-b46bfc50aa29}$$\\\\LUNAPictureID{59c5f0ca-8af1-11eb-b743-b46bfc50aa29}$$\\\\LUNAPictureID{089a10ee-8b7c-11eb-922a-b46bfc50aa29}$', '$\\\\LUNAPictureID{3c0054af-8af1-11eb-a7f3-b46bfc50aa29}$$\\\\LUNAPictureID{59c5f0cb-8af1-11eb-b785-b46bfc50aa29}$$\\\\LUNAPictureID{089a10ef-8b7c-11eb-ad65-b46bfc50aa29}$']", "type": 6}
-{"stem": "已知向量$\\vec{a}, \\quad \\vec{b}$，满足$|\\vec{a}|=1, \\quad \\vec{a} \\cdot \\vec{b}=-1$，则$\\vec{a} \\cdot(2 \\vec{a}-\\vec{b})=$（　　）", "options": "['4', '3', '2', '0']", "type": 6}
-{"stem": "双曲线$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, b>0)$的离心率为$\\sqrt{3}$，则其渐近线方程为（　　）", "options": "['$y=\\\\pm \\\\sqrt{2} x$', '$y=\\\\pm \\\\sqrt{3} x$', '$y=\\\\pm \\\\frac{\\\\sqrt{2}}{2} x$', '$y=\\\\pm \\\\frac{\\\\sqrt{3}}{2} x$']", "type": 6}
-{"stem": "在$\\triangle \\mathrm{ABC}$中，$\\cos \\frac{C}{2}=\\frac{\\sqrt{5}}{5}, \\quad B C=1, \\quad A C=5$，则$A B=$（　　）", "options": "['$4 \\\\sqrt{2}$', '$\\\\sqrt{30}$', '$\\\\sqrt{29}$', '$2 \\\\sqrt{5}$']", "type": 6}
-{"stem": "为计算$S=1-\\frac{1}{2}+\\frac{1}{3}-\\frac{1}{4}+\\ldots+\\frac{1}{99}-\\frac{1}{100}$，设计了如图的程序框图，则在空白框中应填入（　　）$\\FigureID{3bfbd1c9-8af1-11eb-9464-b46bfc50aa29}$$\\FigureID{59c18f00-8af1-11eb-ae1f-b46bfc50aa29}$$\\FigureID{0896921a-8b7c-11eb-9b2c-b46bfc50aa29}$", "options": "['$\\\\mathrm{i}=\\\\mathrm{i}+1$', '$\\\\mathrm{i}=\\\\mathrm{i}+2$', '$\\\\mathrm{i}=\\\\mathrm{i}+3$', '$\\\\mathrm{i}=\\\\mathrm{i}+4$']", "type": 6}
-{"stem": "我国数学家陈景润在哥德巴赫猜想的研究中取得了世界领先的成果．哥德巴赫猜想是“每个大于2的偶数可以表示为两个素数的和”，如$30=7+23$．在不超过30的素数中，随机选取两个不同的数，其和等于30的概率是（　　）", "options": "['$\\\\frac{1}{12}$', '$\\\\frac{1}{14}$', '$\\\\frac{1}{15}$', '$\\\\frac{1}{18}$']", "type": 6}
-{"stem": "在长方体$\\mathrm{ABCD}-\\mathrm{A}_{1} \\mathrm{B}_{1} \\mathrm{C}_{1} \\mathrm{D}_{1}$中，$\\mathrm{AB}=\\mathrm{BC}=1, \\quad \\mathrm{AA}_{1}=\\sqrt{3}$，则异面直线$\\mathrm{AD}_{1}$与$\\mathrm{DB}_{1}$所成角的余弦值为（　　）", "options": "['$\\\\frac{1}{5}$', '$\\\\frac{\\\\sqrt{5}}{6}$', '$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{\\\\sqrt{2}}{2}$']", "type": 6}
-{"stem": "若$f(x)=\\cos x-\\sin x$在$[-a, a]$是减函数，则$a$的最大值是（　　）", "options": "['$\\\\frac{\\\\pi}{4}$', '$\\\\frac{\\\\pi}{2}$', '$\\\\frac{3 \\\\pi}{4}$', '$\\\\pi$']", "type": 6}
-{"stem": "已知$f(x)$是定义域为$(-\\infty,+\\infty)$的奇函数，满足$f(1-x)=f(1+x)$，若$f(1)=2$，则$f(1)+f(2)+f(3)+\\ldots+f(50)=$（　　）", "options": "['-50', '0', '2', '50']", "type": 6}
-{"stem": "已知$\\mathrm{F}_{1}, \\mathrm{F}_{2}$是椭圆$C: \\frac{x^{2}}{a^{2}}+\\frac{y^{2}}{b^{2}}=1 \\quad(a>b>0)$的左、右焦点，A是C的左顶点，点P在过A且斜率为$\\frac{\\sqrt{3}}{6}$的直线上，$\\triangle \\mathrm{PF}_{1} \\mathrm{F}_{2}$为等腰三角形，$\\angle \\mathrm{F}_{1} \\mathrm{F}_{2} \\mathrm{P}=120^{\\circ}$，则C的离心率为（　　）", "options": "['$\\\\frac{2}{3}$', '$\\\\frac{1}{2}$', '$\\\\frac{1}{3}$', '$\\\\frac{1}{4}$']", "type": 6}
-{"stem": "曲线$y=2 \\ln (x+1)$在点(0,0)处的切线方程为_______", "options": "[]", "type": 2}
-{"stem": "若x，y满足约束条件$\\left\\{\\begin{array}{l}x+2 y-5 \\geq 0 \\ x-2 y+3 \\geq 0 \\ x-5 \\leq 0\\end{array}\\right.$，则$z=x+y$的最大值为_______", "options": "[]", "type": 2}
-{"stem": "已知$\\sin \\alpha+\\cos \\beta=1, \\quad \\cos \\alpha+\\sin \\beta=0$，则$\\sin (\\alpha+\\beta)=$$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "已知圆锥的顶点为S，母线SA，SB所成角的余弦值为$\\frac{7}{8}$，SA与圆锥底面所成角为$45^{\\circ}$，若$\\triangle \\mathrm{SAB}$的面积为$5 \\sqrt{15}$，则该圆锥的侧面积为_______", "options": "[]", "type": 2}
-{"stem": "记$S_{n}$为等差数列$\\left\\{a_{n}\\right\\}$的前$n$项和，已知$a_{1}=-7, \\quad S_{3}=-15$．（1）求$\\left\\{a_{n}\\right\\}$的通项公式；（2）求$\\mathrm{S}_{n}$，并求$\\mathrm{S}_{n}$的最小值．", "options": "[]", "type": 4}
-{"stem": "如图是某地区2000年至2016年环境基础设施投资额y（单位：亿元）的折线图．为了预测该地区2018年的环境基础设施投资额，建立了$y$与时间变量t的两个线性回归模型．根据2000年至2016年的数据（时间变量t的值依次为1，2，…，17）建立模型①：$\\widehat{y}=-30.4+13.5 \\mathrm{t}$；根据2010年至2016年的数据（时间变量t的值依次为1，2，…，7）建立模型②：$\\widehat{y}=99+17.5 t$．（1）分别利用这两个模型，求该地区2018年的环境基础设施投资额的预测值；（2）你认为用哪个模型得到的预测值更可靠？并说明理由．$\\FigureID{3bfbf8da-8af1-11eb-9b4a-b46bfc50aa29}$$\\FigureID{59c18f01-8af1-11eb-b48b-b46bfc50aa29}$$\\FigureID{0896921b-8b7c-11eb-b0a7-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "设抛物线$\\mathrm{C}: \\mathrm{y}^{2}=4 \\mathrm{x}$的焦点为F，过F且斜率为$k(k>0)$的直线l与C交于A，B两点，|AB|=8．（1）求l的方程；（2）求过点A，B且与C的准线相切的圆的方程．", "options": "[]", "type": 4}
-{"stem": "如图，在三棱锥P﹣ABC中，$A B=B C=2 \\sqrt{2}$，$\\mathrm{PA}=\\mathrm{PB}=\\mathrm{PC}=\\mathrm{AC}=4$，O为AC的中点．（1）证明：PO⊥平面ABC；（2）若点M在棱BC上，且二面角M﹣PA﹣C为30°，求PC与平面PAM所成角的正弦值．", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=e^{x}-a x^{2}$．（1）若$a=1$，证明：当$x \\geqslant 0$时，$f(x) \\geqslant 1$；（2）若$f(x)$在$(0,+\\infty)$只有一个零点，求$a$．", "options": "[]", "type": 4}
-{"stem": "在直角坐标系$xOy$中，曲线C的参数方程为$\\left\\{\\begin{array}{l}x=2 \\cos \\theta \\ y=4 \\sin \\theta\\end{array}\\right.$，（$θ$为参数），直线l的参数方程为$\\left\\{\\begin{array}{l}x=1+t \\cos \\alpha \\ y=2+\\operatorname{tain} \\alpha\\end{array}\\right.$，（$t$为参数）．（1）求C和l的直角坐标方程；（2）若曲线C截直线l所得线段的中点坐标为(1,2)，求l的斜率．", "options": "[]", "type": 4}
-{"stem": "设函数$f(x)=5-|x+a|-|x-2|$．（1）当$a=1$时，求不等式$f(x) \\geqslant 0$的解集；（2）若$f(x) \\leqslant 1$，求$a$的取值范围．", "options": "[]", "type": 4}
-{"stem": "设集合A={x|x2-5x+6>0}，B={ x|x-1<0}，则A∩B=", "options": "['$(-\\\\infty, 1)$', '(-2,1)', '(-3,-1)', '$(3,+\\\\infty)$']", "type": 6}
-{"stem": "设$z=-3+2i$，则在复平面内$\\bar{z}$对应的点位于", "options": "['第一象限', '第二象限', '第三象限', '第四象限']", "type": 6}
-{"stem": "已知$\\overrightarrow{A B}=(2,3)$,$\\overrightarrow{A C}=(3, t)$,则$\\overrightarrow{A B} \\cdot \\overrightarrow{A C}$", "options": "['-3', '-2', '2', '3']", "type": 6}
-{"stem": "2019年1月3日嫦娥四号探测器成功实现人类历史上首次月球背面软着陆，我国航天事业取得又一重大成就，实现月球背面软着陆需要解决的一个关键技术问题是地面与探测器的通讯联系．为解决这个问题，发射了嫦娥四号中继星“鹊桥”，鹊桥沿着围绕地月拉格朗日$L_{2}$点的轨道运行．$L_{2}$点是平衡点，位于地月连线的延长线上．设地球质量为$M_{1}$，月球质量为$M_{2}$，地月距离为R，$L_{2}$点到月球的距离为r，根据牛顿运动定律和万有引力定律，r满足方程：$\\frac{M_{1}}{(R+r)^{2}}+\\frac{M_{2}}{r^{2}}=(R+r) \\frac{M_{1}}{R^{3}}$.\n设$\\alpha=\\frac{r}{R}$，由于$\\alpha$的值很小，因此在近似计算中$\\frac{3 a^{3}+3 \\alpha^{4}+\\alpha^{5}}{(1+\\alpha)^{2}} \\approx 3 \\alpha^{3}$，则r的近似值为", "options": "['$\\\\sqrt{\\\\frac{M_{2}}{M_{1}}} R$', '$\\\\sqrt{\\\\frac{M_{2}}{2M_{1}}} R$', '$\\\\sqrt{\\\\frac{3M_{2}}{M_{1}}} R$', '$\\\\sqrt{\\\\frac{M_{2}}{3M_{1}}} R$']", "type": 6}
-{"stem": "演讲比赛共有9位评委分别给出某选手的原始评分，评定该选手的成绩时，从9个原始评分中去掉1个最高分、1个最低分，得到7个有效评分.7个有效评分与9个原始评分相比，不变的数字特征是", "options": "['中位数', '平均数', '方差', '极差']", "type": 6}
-{"stem": "若a>b，则", "options": "['$\\\\ln (a-b)>0$', '$3^{a}<3^{b}$', '$a^{3}-b^{3}>0$', '$|a|>|b|$']", "type": 6}
-{"stem": "设α，β为两个平面，则α∥β的充要条件是", "options": "['α内有无数条直线与β平行', 'α内有两条相交直线与β平行', 'α，β平行于同一条直线', 'α，β垂直于同一平面']", "type": 6}
-{"stem": "若抛物线y2=2px（p>0）的焦点是椭圆$\\frac{x^{2}}{3 p}+\\frac{y^{2}}{p}=1$的一个焦点，则p=", "options": "['2', '3', '4', '8']", "type": 6}
-{"stem": "下列函数中，以$\\frac{\\pi}{2}$为周期且在区间$(\\frac{\\pi}{4}, \\frac{\\pi}{2})$单调递增的是", "options": "['$f(x)=|\\\\cos 2 x|$', '$f(x)=|\\\\sin 2 x|$', '$f(x)=\\\\cos |x|$', '$f(x)=\\\\sin |x|$']", "type": 6}
-{"stem": "已知$a \\in\\left(0, \\frac{\\pi}{2}\\right)$，$2 \\sin 2 \\alpha=\\cos 2 \\alpha+1,$ 则 $\\sin \\alpha=$", "options": "['$\\\\frac{1}{5}$', '$\\\\frac{\\\\sqrt{5}}{5}$', '$\\\\frac{\\\\sqrt{3}}{3}$', '$\\\\frac{2 \\\\sqrt{5}}{5}$']", "type": 6}
-{"stem": "设F为双曲线C：$\\frac{x^{2}}{a^{2}}-\\frac{y^{2}}{b^{2}}=1 \\quad(a>0, \\quad b>0)$的右焦点，O为坐标原点，以OF为直径的圆与圆$x^{2}+y^{2}=a^{2}$交于P、Q两点．若|PQ|=|OF|，则C的离心率为", "options": "['$\\\\sqrt{2}$', '$\\\\sqrt{3}$', '2', '$\\\\sqrt{5}$']", "type": 6}
-{"stem": "设函数$f(x)$的定义域为R，满足$f(x+1)=2f(x)$，且当$x \\in (0,1]$时，$f(x)=x(x-1)$.若对任意$x \\in(-\\infty, m]$，都有$f(x) \\geq-\\frac{8}{9}$，则m的取值范围是", "options": "['$\\\\left(-\\\\infty, \\\\frac{9}{4}\\\\right]$', '$\\\\left(-\\\\infty, \\\\frac{7}{3}\\\\right]$', '$\\\\left(-\\\\infty, \\\\frac{5}{2}\\\\right]$', '$\\\\left(-x, \\\\frac{8}{3}\\\\right]$']", "type": 6}
-{"stem": "我国高铁发展迅速，技术先进．经统计，在经停某站的高铁列车中，有10个车次的正点率为0.97，有20个车次的正点率为0.98，有10个车次的正点率为0.99，则经停该站高铁列车所有车次的平均正点率的估计值为_______", "options": "[]", "type": 2}
-{"stem": "已知$f(x)$是奇函数，且当$x<0$时，$f(x)=-e^{ax}$.若$f(\\ln 2)=8$，则$\\SIFBlank$", "options": "[]", "type": 2}
-{"stem": "$\\triangle ABC$的内角A，B，C对边分别为a，b，c。若$b=6,a=2c,B=\\frac{\\pi}{3}$，则$\\triangle ABC$的面积为_______", "options": "[]", "type": 2}
-{"stem": "中国有悠久的金石文化，印信是金石文化的代表之一．印信的形状多为长方体、正方体或圆柱体，但南北朝时期的官员独孤信的印信形状是“半正多面体”（图1）.半正多面体是由两种或两种以上的正多边形围成的多面体.半正多面体体现了数学的对称美．图2是一个棱数为48的半正多面体，它的所有顶点都在同一个正方体的表面上，且此正方体的棱长为1．则该半正多面体共有________个面，其棱长为_________．$\\FigureID{3bfc05ba-8af1-11eb-bcf5-b46bfc50aa29}$$\\FigureID{59c1b61a-8af1-11eb-a3a1-b46bfc50aa29}$$\\FigureID{0896921c-8b7c-11eb-bd06-b46bfc50aa29}$", "options": "[]", "type": 2}
-{"stem": "如图，长方体$A B C D-A_{1} B_{1} C_{1} D_{1}$的底面ABCD是正方形，点E在棱$A A_{1}$上，$B E \\perp E C_{1}$证明：BE⊥平面$E B_{1} C_{1}$；若AE=$A_{1} E$，求二面角$B-E C-C_{1}$的正弦值.$\\FigureID{3bfc05bb-8af1-11eb-9c1f-b46bfc50aa29}$$\\FigureID{59c1b61b-8af1-11eb-a51f-b46bfc50aa29}$$\\FigureID{0896921d-8b7c-11eb-b757-b46bfc50aa29}$", "options": "[]", "type": 4}
-{"stem": "11分制乒乓球比赛，每赢一球得1分，当某局打成10:10平后，每球交换发球权，先多得2分的一方获胜，该局比赛结束.甲、乙两位同学进行单打比赛，假设甲发球时甲得分的概率为0.5，乙发球时甲得分的概率为0.4，各球的结果相互独立.在某局双方10:10平后，甲先发球，两人又打了X个球该局比赛结束.求$P(X=2)$；求事件“X=4且甲获胜”的概率.", "options": "[]", "type": 4}
-{"stem": "已知数列$\\left\\{a_{n}\\right\\}$和$\\left\\{b_{n}\\right\\}$满足$a_{1}=1, \\quad b_{1}=0$，$4 a_{n+1}=3 a_{n}-b_{n}+4, \\quad 4 b_{n+1}=3 b_{n}-a_{n}-4$.证明：$\\left\\{a_{n}+b_{n}\\right\\}$是等比数列，$\\left\\{a_{n}-b_{n}\\right\\}$是等差数列；求$\\left\\{a_{n}\\right\\}$和$\\left\\{b_{n}\\right\\}$的通项公式.", "options": "[]", "type": 4}
-{"stem": "已知函数$f(x)=\\ln x-\\frac{x+1}{x-1}$讨论$f(x)$的单调性，并证明$f(x)$有且仅有两个零点；设$x_{0}$是$f(x)$的一个零点，证明曲线$y=\\ln x$ 在点$A\\left(x_{0}, \\ln x_{0}\\right)$处的切线也是曲线$y=\\mathfrak{e}^{x}$的切线.", "options": "[]", "type": 4}
-{"stem": "已知点A(−2,0)，B(2,0)，动点M(x,y)满足直线AM与BM的斜率之积为$-\\frac{1}{2}$.记M的轨迹为曲线C.求C的方程，并说明C是什么曲线；过坐标原点的直线交C于P，Q两点，点P在第一象限，PE⊥x轴，垂足为E，连结QE并延长交C于点G.\n（i）证明：$\\triangle P Q G$直角三角形；\n（ii）求$\\triangle P Q G$面积的最大值.", "options": "[]", "type": 4}
-{"stem": "在极坐标系中，O为极点，点$M\\left(\\rho_{0}, \\theta_{0}\\right)\\left(\\rho_{0}>0\\right)$在曲线$C: \\rho=4 \\sin \\theta$上，直线$l$过点$A(4,0)$且与OM垂直，垂足为P.当$\\theta_{0}=\\frac{\\pi}{3}$时，求$\\rho_{0}$及$l$的极坐标方程当M在C上运动且P在线段OM上时，求P点轨迹的极坐标方程.", "options": "[]", "type": 4}
-{"stem": "已知$f(x)=|x-a| x+|x-2|(x-a)$当$a=1$时，求不等式$f(x)<0$的解集；若$x \\in(-\\infty, 1)$时，$f(x)<0$，求$a$的取值范围.", "options": "[]", "type": 4}
diff --git a/static/test_data/disenq_test.json b/static/test_data/disenq_test.json
deleted file mode 100644
index a49167fa..00000000
--- a/static/test_data/disenq_test.json
+++ /dev/null
@@ -1,4620 +0,0 @@
-{"question_id": "2847", "content": "两个 数 相乘 ， 如果 两个 因数 同时 扩大 3 倍 ， 那么 积 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17358", "content": "一 次 数学 测验 后 ， 小 王 问 小 明 这次 得 了 多少 分 ， 小 明说 “ 用 我 的 得分 加上 3 ， 减去 18 ， 再 除以 8 ， 最后 乘以 10 就是 100 分 ． ” ， 小 明 的 得分 = 多少 分 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9816", "content": "为了 帮助 四川 地震 灾民 ， 工厂 赶制 一批 救灾 帐篷 ， 第一 车间 完成 了 这 批 帐篷 的 (1/5) ， 第 二 车间 完成 了 这 批 帐篷 的 (1/4) ， 还 剩下 这 批 帐篷 的 几分 之 几 没 完成 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2658", "content": "明明 把 240 元 零花钱 中 的 (5/6) 捐给 希望工程 ， 明明 捐 了 多少 元 钱 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9667", "content": "一 辆 自行车 200 元 ， 在 原价 基础 上 打 0.8 ， 小 明 有 贵宾卡 ， 还 可以 再 打 0.9 ， 小 明 买 这辆 车 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1985", "content": "口袋 里 装有 红 、 黄 、 蓝 、 绿 4 种颜色 的 球 各 5 个 ． 小 华 闭 着 眼睛 从 口袋 里 往 外 摸 球 ， 每次 摸 出 1 个 球 ． 他 至少 要 摸 出 多少 个 球 才能 保证 摸 出 的 球 中 每种 颜色 的 球 都 有 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19456", "content": "师徒俩 人 按 3 ： 2 共同 加工 一批 零件 ， 师傅 分配任务 270 个 ； 当 师傅 正好 完成 时 ， 徒弟 完成 了 分配任务 的 (5/6) ， 徒弟 实际 完成 了 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "20538", "content": "一 个 长方形 的 长 是 (2/5) 米 ， 宽 是 长 的 (3/4) ， 这个 长方形 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17136", "content": "梨树 有 30 棵 ， 梨树 的 棵 数 比 桃树 多 (1/5) ， 梨树 比 桃树 多 多少 棵 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16672", "content": "有 37 名 战士 要 过河 ， 河边 只有 一条 小船 ， 船上 每次 只能 坐 5 人 ， 至少 载 几次 才能 使 他们 全部 过河 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6179", "content": "东风 灯泡厂 生产 一种 新型 节能 灯泡 ， 首批 共 生产 4000 个 ， 合格率 为 98% ， 不 合格 灯泡 有 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15493", "content": "某个 数 与 15 的 积 ， 加上 8.2 ， 等于 28 * 0.4 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19388", "content": "一 辆 汽车 从 甲地 开往 乙地 用 了 12 小时 ， 去 时 80 千米 / 时 ， 返回 时 用 了 10 小时 ． 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4912", "content": "同学 们 排队 做操 ， 小 红 排 在 第 8 ， 她 前面 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7643", "content": "一 根 绳子 ， 剪 去 它 的 (2/5) ， 正好 剪 去 8 米 ， 这根 绳子 还 剩下 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2856", "content": "水果店 运 来 苹果 480 千克 ， 卖出 了 (5/8) ， 卖出 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12330", "content": "一 个数 的 80% 是 3.2 ， 这个 数 的 30% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4238", "content": "一 种 含盐 率 为 10% 的 盐水 50 克 ， 水 有 多少 克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22065", "content": "一 台 拖拉机 一次 可 运 桃子 30 筐 ． 一个 果园 要 运 7200 筐 桃子 ， 用 12 台 这样 的 拖拉机 运 ， 多少 次 可以 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15617", "content": "两个 工程队 共建 一项 工程 ， 甲队 每天 完成 这项 工程 的 (1/5) ， 乙 队 每天 完成 这项 工程 的 (1/7) ， 两个 工程队 一天 可以 完成 这项 工程 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5974", "content": "计算 9999 * 1111 + 3333 * 6667 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5064", "content": "1997 年 至今 ， 我国 铁路 进行 了 大规模 提速 ． 有 一列 火车 提速 40% 后 速度 达到 了 每 时 112 千米 ， 这 列 火车 原来 每 时 行驶 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9290", "content": "一 部 动画片 的 胶片 长 960 米 ， 4 分钟 放映 了 120 米 ， 照 这样 的 速度 ， 放 完 这部 动画片 ， 共 需要 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4935", "content": "一 列 火车 长 180 米 ， 每秒 行驶 25 米 ． 全 车 通过 一条 120 米 长 的 山洞 ， 需要 多长时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17139", "content": "长安 国际 酒店 运 来 一些 大米 ， 吃 了 (2/5) ， 还 剩下 2 吨 ， 酒店 运 来 大米 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17546", "content": "小 红 有 272 元 钱 ， 小毛 比 他 多 (1/8) ， 问 小毛 有 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5332", "content": "箱 苹果 ， 连 箱 共 重 22 千克 ， 其中 箱 的 重量 占 苹果 重量 的 (1/10) ， 箱 中 苹果 重 多少 千克 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19131", "content": "甲 、 乙 两 数 的 和 是 40 ， 甲 ： 乙 = 3 ： 2 ， 甲 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10047", "content": "一 个数 的 25% 是 50 ， 这个 数 的 20% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "170", "content": "甲 、 乙 两 人 从 两地 同时 相对 出发 ， 甲 每分钟 行 110 米 ， 乙 每分钟 行 120 米 ， 经过 15 分钟 两 人 相遇 ， 两地 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16695", "content": "看 一 本书 ， 第一天 看 了 全书 的 20% ， 第 二 天 看 了 全书 的 25% ， 两天 正好 看 了 108 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2634", "content": "把 一批 课外书 按 3 ： 2 分给 甲乙 两个 学校 ， 乙 校 分 得 96 本 ， 这 批 书 共有 多少 本 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21836", "content": "食品店 运进 一批 白糖 和 200 千克 红糖 ， 卖出 50 千克 白糖 和 80 千克 红糖 后 ， 剩下 的 红糖 和 白糖 的 千克 数 同样 多 ． 食品店 原有 白糖 多少 千克 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10709", "content": "29 届 奥运会 在 北京 举行 ， 天津 也 是 协办 城市 之一 ， 从 北京 到 天津 ， 汽车 每 小时 行 55 千米 ， 行 2 小时 后 离 天津 还有 20 千米 ， 北京 到 天津 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1562", "content": "学校 买来 6 箱 图书 ， 每箱 50 本 ， 平均 分给 4 个 年级 ， 每个 年级 分 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1320", "content": "一 堆 煤 ， 第一天 运走 了 总数 的 (2/5) ， 第 二 天 运走 了 总数 的 (1/3) ， 还 剩下 这 堆 煤 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "782", "content": "2012 - 2 * 7 * 11 * 13 = ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "14460", "content": "植物园 中 ， 红杉树 占 总 棵 数 的 5% ， 银杏树 占 总 棵 数 的 7% ， 红杉树 比 银杏树 少 20 棵 ， 植物园 里 共有 多少 棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13809", "content": "有 不同 的 语文 书 4 本 ， 数学 书 5 本 ， 英语书 3 本 ， 自然 书 2 本 ． 从中 各 任 取 一本 ， 共有 多少 种 不同 的 取法 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "9425", "content": "250 与 350 的 和 减去 13 与 26 的 积 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9326", "content": "张 奶奶 把 30000 元 存入 银行 ， 年利率 为 3.60% ， 利息税 为 5% ， 存期 2 年 ， 到期 后 她 可以 得到 本金 和 税后 利息 共 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "18849", "content": "植树节 四年级 栽树 345 棵 ， 五年级 栽 的 棵 树 比 四年级 的 3 倍 少 25 棵 ， 两个 年级 一共 栽 多少 棵 树 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "400", "content": "一 辆 汽车 从 甲地 到 乙地 ， 第一 小时 行 了 全程 的 25% ， 第 二 小时 行 了 全程 的 30% ， 两 小时 一共 行 了 220 千米 ， 甲乙 两地 全长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3495", "content": "125 千克 增加 10% 后 = 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4035", "content": "一 座 山上 共有 白杨树 275 棵 ， 梧桐树 是 白杨树 的 10 倍 还 多 5 棵 ， 白杨树 和 梧桐 共 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7286", "content": "小 英 从 图书馆 借来 一本 小说 ， 每天 看 8 页 ， 15 天 看 了 这 本书 的 一半 ， 以后 每天 看 12 页 ， 正好 在 借 期内 看 完 ， 这 本书 的 借期 = 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18520", "content": "4.4 与 (1/40) 的 积 ， 减去 8 / 300 的 商 ， 所得 的 差 除 (1/3) ， 商 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10729", "content": "服装厂 生产 一批 校服 ， 原 计划 15 天 完成 ， 实际 每天 比 计划 多 做 30 套 ， 因此 比 计划 提前 3 天 完成 ， 这 批 服 校服 共有 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17042", "content": "把 41.5 千克 的 白砂糖 装 成 若干 袋 ， 每 袋 0.5 千克 ， 每 袋 售价 2.3 元 ， 这些 白砂糖 一共 可以 卖 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "90", "content": "两地 相距 120 千米 ， 甲 、 乙 两 人 骑 自行车 同时 从 两地 相对 出发 ， 甲 车 每 小时 行 14 千米 ， 经过 4 小时 后 与 乙 车 相遇 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13332", "content": "一 个 压路机 的 前轮 是 圆柱形 ， 轮 宽 1.5 米 ， 直径 是 1.2 米 ， 前轮 转动 一周 ， 压路 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21335", "content": "一 支 钢笔 的 售价 是 75 元 ， 打 0.8 后 的 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22027", "content": "小 刚 家 上个月 共 用水 20 吨 ， 每吨 水 收费 1.5 元 ， 小 刚 家 共有 4 口 人 ， 上个月 平均 每人 交 水费 多 是 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21956", "content": "爷爷 今年 72 岁 ， 爸爸 年龄 是 爷爷 的 (5/9) ， 我 的 年龄 是 爸爸 的 (3/10) ． 我 今年 多少岁 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "158", "content": "打字员 打 一部 书稿 ， 每 小时 打 3.6 千字 ， 5 小时 完成 ， 如果 每 小时 打 4.5 千字 ， 几小时 能 打 完 这部 书稿 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9969", "content": "红旗 村 今年 已 植树 1200 棵 ， 正好 是 原 计划 的 (5/6) ， 原 计划 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14480", "content": "服装厂 加工 一批 工作服 ， 做 一件 上衣 需 2.1 米 布 ， 做 一条 裤子 需 1.2 米 布 ， 采购 85.8 米 布 ， 可以 加工 多少 套 工作服 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3873", "content": "小 青 买 了 2 棵 黄瓜 ， 付出 1.2 元 ， 找回 0.08 元 ， 每棵 黄瓜 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14584", "content": "丁丁 、 东东 和 当 当 3 人 的 年龄 和 是 31 岁 ， 丁丁 今年 12 岁 ， 比 当 当 大 3 岁 ． 请问 ： 东东 今年 多少岁 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6870", "content": "工程队 修 一条 600 米 的 公路 ， 修 了 8 天 后 ， 还 剩 120 米 没 修 完 ． 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "258", "content": "学校 买 了 4 盒 钢笔 ， 每盒 8 枝 ， 每支 钢笔 25 元 ， 一共 花 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22597", "content": "有 浓度 为 10% 的 盐水 170 克 ， 加入 多少 克 盐 后 ， 盐水 的 浓度 为 15% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7264", "content": "小 明 买 了 3.2 千克 香蕉 ， 共 花 了 8 元 钱 ， 平均 每千克 香蕉 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8153", "content": "全世界 哺乳类 动物 约 有 4000 种 ， 其中 我国 约 有 500 种 ， 我国 哺乳类 动物 占 全世界 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11885", "content": "小 红 家 装修 新房 ， 实际 花费 8 万元 ， 比 计划 节约 2 万元 ． 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18112", "content": "农科院 研究所 有 一块 400 m ^ 2 的 实验田 ， 先 划出 总面积 的 (2/5) 种 白菜 ， 剩下 的 面积 按 3 ： 5 的 比例 种 西红柿 和 黄瓜 ， 种 黄瓜 的 面积 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16673", "content": "学习 要 买 9 个 篮球 和 8 个 小 足球 ， 共 付出 300 元 ， 每个 小 足球 价格 15 元 ， 每个 篮球 价格 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19447", "content": "一 根 铁丝 的 长度 为 2 米 ， 如果 把 它 平均 分成 3 份 ， 那么 每份 的 长度 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2146", "content": "小朋友 排队 看 电影 ， 从 排头 数起 ， 小 华 是 第 18 个 ， 从 排 尾数 起 ， 小 华 是 第 30 个 ． 这 队 共有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1378", "content": "水果店 有 水果 820 千克 ， 每天 白天 卖出 120 千克 ， 晚上 又 进货 70 千克 ， 照 这样 计算 ， 多少 天 后 水果 恰好 卖完 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "769", "content": "一 条 路 3000 米 ， 前 5 天 平均 每天 修 100 米 ， 剩下 的 要 4 天 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20559", "content": "(3/4) - (2/5) 的 差 去除 (5/8) ， 商 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8557", "content": "168.54 + 368.54 + 568.54 + 768.54 + 968.54 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "22032", "content": "冬天 到 了 ， 商场 上午 卖出 25 台 取暖器 ， 下午 卖出 30 台 ， 每 台 取暖器 的 价钱 是 308 元 ， 这个 商场 这天 卖 取暖器 的 收入 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17002", "content": "计算 ： 500 + 501 + 502 + 503 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "369", "content": "一 只 蜗牛 沿着 10 米 高 的 柱子 往上爬 ， 每天 清晨 到 傍晚 共 向 上爬 5 米 ， 夜间 下滑 4 米 ， 像 这样 ， 从 某 天 清晨 开始 ， 它 需要 几天 才能 爬 上 柱子 的 顶端 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10440", "content": "少先队员 采集 树种 ， 第一 小组 4 人 ， 平均 每人 采集 树种 1.2 千克 ， 第 二 小组 6 人 ， 平均 每人 采集 树种 1.25 千克 ． 这 两个 组 平均 每人 采集 树种 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12267", "content": "公交车 ， 下车 9 天 ， 上车 3 天 ， 这时 车上 还有 19 人 ， 到 站 前 车上 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18583", "content": "公园 里 有 柳树 160 棵 ， 是 杨树 的 (8/5) ， 槐树 棵 数 又 是 杨树 的 (4/5) ． 槐树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9046", "content": "4 （ 2 ） 班 大部分 同学 积极 参加 课外 兴趣小组 ． 有 (4/15) 的 同学 参加 美术组 活动 ， 比 书法 小组 多 (1/15) ． 还有 几分 之 几 的 同学 没有 参加 这 两个 小组 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12317", "content": "甲 、 乙 、 丙 3 人 共同 加工 一批 零件 ， 甲 加工 的 零件 与 乙 、 丙 两 人 加工 的 零件 总数 比 是 1 ： 2 ， 甲 、 丙 两 人 共 加工 135 个 ， 乙 加工 了 这 批 零件 的 (1/4) ， 这 批 零件 共有 几个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "32", "content": "一 班 开展 课外活动 ， 全班 人数 的 (1/7) 参加 科技 组 ， 比 参加 阅读 组 的 少 占 全班 人数 的 (2/7) ， 参加 这 两个 组 的 人数 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5990", "content": "商场 在 做 促销 活动 ， 有 一种 商品 原价 1600 元 ， 在 原来 基础 上 降价 10 元 后 ， 又 降价 10% ， 现在 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6614", "content": "学校 有 12 个 同学 参加 朗诵 比赛 ， 比赛 的 先后顺序 由 抽签 决定 ， 小 红 抽 到 1 号 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2122", "content": "木 工厂 要 做 2000 套 家具 ， 已经 做 了 15 天 ， 每天 做 130 套 ， 还 剩 多少 套 没有 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19398", "content": "一 年 定期存款 的 年利率 是 2.25% ， 10000 元 的 存款 一年 以后 按 20% 缴纳 利息税 ， 应 交纳 利息税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "14527", "content": "刘 明 从 学校 到 电影院 要 走 910 米 ， 4 分钟 走 了 364 米 ， 照 这样 的 速度 ， 他 从 学校 到 电影院 还要 走 多长时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9348", "content": "师傅 和 徒弟 两 人 同时 加工 同 一种 零件 ， 经过 2.5 小时 ， 师傅 比 徒弟 多 加工 了 30 个 ． 已知 徒弟 每 小时 加工 80 个 ， 师傅 每 小时 加工 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8708", "content": "小 红 每分钟 大约 走 55 米 ， 她 从 学校 到 图书馆 大约 要 走 9 分钟 ． 学校 距 图书馆 大约 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12116", "content": "食品盒 厂 原来 每天 生产 食品盒 300 个 ， 由于 改进 生产 设备 ， 现在 每天 可以 多 生产 60 个 ． 照 这样 计算 ， 生产 9000 个 食品盒 ， 可以 比 原来 提前 多少 天 完成 任务 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22736", "content": "一 副 羽毛 拍 76 元 ， 一个 羽毛球 3 元 钱 ， 王老师 拿出 100 元 钱 买 了 一副 羽毛 拍 ， 剩下 的 钱 还 能 买 几个 羽毛球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5950", "content": "王 叔叔 选择 的 上网 收费 标准 是 ： 每月 交 30 元 可以 上网 50 时 ， 超时 每 时 收 1.5 元 ． 7 月份 陈 叔叔 交 了 66 元 ， 这个 月 上网 多少 时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1996", "content": "陶瓷工艺 厂 委托 运输 公司 送 10000 只 陶瓷 花瓶 ， 每 只 成本价 7.5 元 ， 双方 在 合同 中 规定 ， 每 只 的 运费 为 成本价 的 4% ， 若 损坏 ， 每 只 扣除 运费 ， 并 赔付 损失费 8.2 元 ， 运输 员 在 和 万 利 公司 交换 货物 后 ， 得到 2966 元 运费 ， 那么 在 运输 过程 中 ， 打破 了 几只 花瓶 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12062", "content": "李 大伯 参加 县 农村 合作 医疗保险 ． 条款 规定 ： 农民 住院 医疗费 设 起 付 线 ， 县级 医疗机构 为 300 元 ； 在 起 付 线 以上 的 部分 按 60% 补偿 ． 今年 4 月份 李 大伯 患 了 急性 肠炎 ， 在 县 定点医院 住院治疗 了 10 天 ， 医疗 费用 共计 6260 元 ． 按 条款 规定 ， 李 大伯 只要 自付 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22623", "content": "某 方便面 的 广告语 这样 说 ： “ 赠 量 25% ， 加 量 不 加价 ． ” 一袋 方便面 现在 的 重量 是 120 克 ， 你 知道 赠 量 前 = 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21718", "content": "李 锋 拿到 一笔 2000 元 的 奖学金 ． 他 打算 按 下面 的 方案 进行 分配 ： 其中 15% 购 学习 用书 ， (2/5) 用来 帮助 他人 ， 其余 的 全部 存入 银行 ． 他 存入 银行 的 钱 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14346", "content": "小 明 家 的 鸡 一 天下 8 个 鸡蛋 ， 一共 重 (4/5) 千克 ， 平均 每个 鸡蛋 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19282", "content": "芳 芳 打 一份 稿件 ， 上午 打 了 这份 稿件 总 字 的 20% ， 下午 打 了 这份 稿件 总 字 的 25% ， 一共 打 了 1350 个 字 ． 这份 稿件 一共 有 多少 个 字 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12886", "content": "一 块 长方形 铁皮 ， 长 10 分 米 ， 宽 8 分 米 ， 沿 它 的 对角线 裁开 ， 可 裁成 2 个 大小 相等 的 三角形 ， 每个 三角形 的 面积 = 多少 平方分米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "864", "content": "一 艘 军舰 的 静水 速度 为 每 小时 54 千米 ， 海水 的 速度 是 每 小时 16 千米 ， 逆水 航行 798 千米 ， 需要 用 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20308", "content": "饲养场 有 鸡 500 只 ， 鸭 是 鸡 的 120% ， 鸭 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1211", "content": "5 （ 1 ） 班 图书 角 原有 一些 书 ， 借出 40 本 后 ， 还 剩 26 本 ． 图书 角 原有 多少 本书 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12031", "content": "一 个数 的 103 倍 是 5974 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20755", "content": "一 根 铁丝 ， 第一次 用 去 12 米 ， 是 第 二 次 用 去 的 (6/7) ， 两次 一 共用 去 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2715", "content": "一 个 圆柱形 水桶 ， 若 将 高 改为 原来 的 一半 ， 底面 直径 为 原来 的 2 倍 ， 可 装 水 40 千克 ， 那么 原来 可 装 水 多少 千克 ？", "knowledge": ["*", "/", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "22035", "content": "某 小学 有 学生 1200 人 ， 每个 学生 一天 上 5 节 课 ， 每个 老师 一天 教 4 节 课 ， 每个 班 有 1 名 教师 和 30 名 学生 ， 那么 这 所 学校 共有 教师 多少 名 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14234", "content": "修 一条 长 1000 m 的 水渠 ， 已经 修 了 7 天 ， 每天 修 120 m ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5060", "content": "一 瓶 饮料 1.25 升 ， 喝 了 一些 后 还 剩 0.75 升 ． 喝 了 多少 升 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22893", "content": "王老师 去 某班 教室 上课 ， 从 一楼 开始 ， 每 走 一层 有 16 个 台阶 ， 一共 走 了 48 个 台阶 ， 你 知道 王老师 去 多少 楼 教室 上课 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18274", "content": "数学课 上 ， 叶 老师 布置 了 两道 数学题 ， 结果 有 15 人 做 对 了 第一道 题 ； 有 24 人 做 对 了 第 二 道 题 ； 两道 题 都 做 对 的 与 两道 题 都 做 错 的 都 是 4 人 ． 那么 ， 这个 班上 共有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14210", "content": "20 加上 一个 数 的 35% 正好 等于 55 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4290", "content": "张 阿姨 打 一份 稿件 ， 第一天 打 了 总数 的 12% ， 第 二 天 打 了 总数 的 18% ， 两天 一共 打 了 180 页 ， 这份 稿件 一共 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9107", "content": "张老师 是 集邮 爱好者 ， 他 收集 了 240 张 中国 邮票 ， 收集 的 外国 邮票 比 中国 邮票 少 (1/8) ． 收集 的 外国 邮票 有 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "224", "content": "一 堆 煤 ， 用 去 它 的 60% ， 还 剩下 24 吨 ； 若 用 去 它 的 50% ， 则 剩下 多少 吨 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22188", "content": "25 * 2 的 积 与 5 乘 多少 的 积 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10289", "content": "某 公司 要 生产 手机 54 万部 ， 前 10 天 平均 每天 生产 1.5 万部 余下 的 要 在 13 天 内 完成 ， 平均 每天 生产 手机 多少 万部 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "796", "content": "地球 上 重 1 千克 的 物体 在 月球 上 只有 (5/24) 千克 重 ， 那么 在 地球 上 重 40 千克 的 物体 在 月球 上 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20568", "content": "小 明 爸爸 买 了 10000 元 的 国债 （ 免征 利息税 ） ， 定期 3 年 ， 利率 为 4.76% ， 到期 后 他 一共 可以 取出 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15130", "content": "一 个数 除以 29 ， 商 和 余数 都 是 9 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10321", "content": "五年级 气象 小组 中 ， 女生 人数 占 男生 的 (3/4) ， 后来 又 有 2 名 女生 参加 这个 小组 ， 女生 人数 占 男生 人数 的 (7/8) ． 问 这个 气象 小组 原来 有 女生 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4946", "content": "某 自行车厂 去年 计划 生产 自行车 12600 辆 ， 结果 上半年 完成 计划 的 55% ， 下半年 完成 计划 的 60% ， 实际 比 计划 多 生产 了 多少 辆 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8291", "content": "全国 统一 鞋号 中 ， 成年 男 鞋 有 14 种 尺码 ， 其中 最小 的 尺码 是 23.5 厘米 ， 各 相邻 两个 尺码 都 相差 0.5 厘米 ， 其中 最大 的 尺码 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22945", "content": "学校 图书室 原有 藏书 4580 册 ， 有 209 册 破损 清除 了 ， 6 一 儿童节 时 同学 们 又 补 捐 了 1049 册 ， 学校 现有 图书 多少 册 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9470", "content": "比 13 少 3 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5955", "content": "一 个 平行四边形 面积 是 36.4 平方厘米 ， 高 是 1.4 厘米 ， 它 的 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11486", "content": "有 足球 72 个 ， 正好 是 篮球 个数 的 8 倍 ， 篮球 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17321", "content": "东风 轧钢厂 ， 4.5 小时 轧钢 94.5 吨 ， 照 这样 算 ， 轧 50.4 吨 的 钢 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11915", "content": "第一 车间 原 计划 用 48 小时 生产 3360 个 零件 ， 实际 每 小时 生产 75 个 ， 比 原 计划 每 小时 多 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8023", "content": "一 批 冬瓜 ， 卖出 100 千克 ， 卖出 的 与 剩下 的 比 是 5 ： 8 ． 这 批 冬瓜 共 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18817", "content": "某 工厂 制造 一批 机器 ， 计划 每天 生产 64 台 ， 15 天 完成 ． 实际 只用 了 12 天 就 完成 了 任务 ， 比 原 计划 每天 多 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1118", "content": "小 英 说 ： “ 我 做 了 38 朵 红花 ， 18 朵 黄花 ． ” 小 玲 说 ： “ 我 要 将 小 英 做 的 花 扎成 花束 ， 每 8 朵 扎成 一束 ， 可以 扎成 多少 束 ？ ” 请 你 帮 小 玲 算 一 算 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10943", "content": "5 只 面包 共 重 300 克 ， 一只 面包 重 多少 克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7767", "content": "一 辆 卡车 运 苹果 ， 每次 运 200 箱 ， 4 次 运 完 这 批 苹果 的 (2/7) ． 这 批 苹果 有 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3428", "content": "工程队 要 挖 一条 900 米 长 的 水渠 ， 计划 每天 挖 60 米 ， 由于 采用 新 技术 ， 实际 每天 比 计划 多 挖 30 米 ． 实际 用 多少 天 挖 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7965", "content": "实际 产量比 计划 产量 增加 20% ， 实际 产量 是 计划 产量 的 多少 % ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6344", "content": "一 座 电视塔 高 120 米 ， 是 电视台 大楼 高度 的 4 倍 ． 电视台 大楼 高 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7476", "content": "一 捆 电线 长 200 米 ， 用 去 一些 后 ， 还 剩下 (2/5) ． 用 去 的 比 剩下 的 多 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13620", "content": "新兴 学校食堂 原来 有 大米 427 千克 ， 上周 吃 了 300 千克 后 ， 又 运 来 大米 325 千克 ， 食堂 现在 有 多少 千克 大米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22847", "content": "电信局 给 景 华 小区 710 户 居民 安装 电话 ， 7 天 安装 了 556 户 ， 余下 的 2 天 完成 ， 余下 的 平均 每天 安装 多少 户 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7499", "content": "某 农场 植树造林 ， 去年 植树 80 公顷 ， 今年 植树 100 公顷 ， 今年 造林 面积 比 去年 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8546", "content": "甲乙 两地 相距 480 千米 ， 客货 两车 同时 从 甲乙 两地 相向 而 行 ， 客车 平均 每 小时 行 65 千米 ， 货车 平均 每 小时 行 60 千米 ， 行驶 了 3 小时 ， 这时 两车 还 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8902", "content": "320 被 68 - 4 的 差 除 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22245", "content": "六年级 一班 男生 有 72 人 ， 女生 有 21 人 ， 全班学生 占 六年级 学生 总数 的 (3/10) ． 六年级 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19221", "content": "三年级 有 4 个 小组 ， 每组 11 人 ， 平均 每人 采 5 个 昆虫 标本 ， 全年 级 一共 采集 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16412", "content": "5679 + 9999 + 8889 + 4321 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21845", "content": "甲 、 乙 两个 工程队 分别 从 两端 同时 开凿 一条 隧道 ． 甲队 每天 开凿 18 米 ， 乙 队 每天 开凿 32 米 ， 120 天 后 凿 完 ． 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19740", "content": "一 种 药水 原价 每瓶 3.8 元 ， 降价 后 为 3.42 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16091", "content": "285 / 5 的 商 再 加上 141 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6416", "content": "北欧 有 一种 候鸟 ， 名叫 金 鴴 ． 迁徙 时 它 的 飞行速度 很快 ， 平均 每 小时 能 飞行 90 千米 ． 如果 连续飞行 15 小时 ， 一共 能 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "37", "content": "李 叔叔 把 2000 元 人民 存入 银行 ， 定期 2 年 ， 年利率 为 2.25% ， 到期 后 他 一共 从 银行 取回 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21606", "content": "计算 ： 41.7 * 4.3 + 43 * 0.71 + 512 * 0.43 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "5589", "content": "有 一 本书 ， 丁丁 每天 看 40 页 ， 看 了 8 天 ， 还 剩 58 页 ， 这 本书 一共 有 几页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9805", "content": "工人 师傅 和 徒弟 做 机器 零件 ， 王师傅 每 小时 做 45 个 ， 徒弟 每 小时 做工 35 个 ， 他们 一起 工作 8 小时 ， 一共 做 了 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "332", "content": "一 项 工程 ， 如果 40 人 来 做 ， 30 天 可以 完成 ． 如果 50 人 来 做 ， 多少 天 可以 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3079", "content": "在 一条 长 600 米 的 马路 一边 安装 路灯 （ 两端 都 装 ） ， 每隔 30 米 装 1 盏 ， 一共 要 装 多少 盏 路灯 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21890", "content": "某 机械厂 加工 一批 零件 ， 第一 车间 加工 了 这些 零件 的 (3/5) ， 第 二 车间 加工 了 这 批 零件 的 (5/8) ， 结果 超产 450 个 ， 这个 厂 计划 加工 多少 个 机器 零件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16974", "content": "甲乙 两车 同时 从 ab 两地 对 开 ， 甲 每 小时 比 乙 多行 5 千米 ， 4 小时 两车 相遇 ， 相遇 时 乙 行 全程 的 48% ， a 、 b 两地 有 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15842", "content": "一 节 课 的 时间 是 (2/3) 小时 ， 老师 讲课 用 了 (1/4) 小时 ， 同学 们 用于 探索 、 实践 活动 的 时间 是 (1/3) 小时 ， 剩下 的 是 同学 们 独立 作业 的 时间 ． 同学 们 独立 作业 的 时间 = 多少 小时 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9861", "content": "学校食堂 运 来 大米 3000 千克 ， 计划 吃 20 天 ， 实际 吃 了 25 天 ， 实际 每天 比 原 计划 少 吃 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8435", "content": "72 与 23 的 积 ， 减去 2400 / 30 所得 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18690", "content": "友谊 超市 有 进口 水果 120 千克 ， 恰好 是 国产 水果 的 (4/5) ． 这个 超市 有 国产 水果 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9103", "content": "妈妈 带 了 800 元 钱 ， 买手机 用 去 450 元 ， 买 书 用 去 了 185 元 ， 还 剩 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17377", "content": "“ 苹果 的 筐 数 比 梨 多 (1/3) ” 这 句 话 是 把 多少 看作 单位 “ 1 ” 也就是说 苹果 的 筐 数 是 梨 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12001", "content": "一 种 商品 降价 20% 后 是 160 元 ， 这种 商品 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10127", "content": "“ 6 一 ” 儿童节 书店 优惠 售书 ， 所有 图书 一律 0.8 出售 ． 李 芳 买 了 两本书 ， 标价 分别 为 32 元 和 18 元 ． 李 芳 一共 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3533", "content": "强强 家 每月 收入 3000 元 ， 除去 600 元 的 住房贷款 外 ， 余下 的 按 3 ： 5 分配 ， 分别 作为 储蓄 和 生活费用 ． 请 你 帮忙 算 一 算 ， 强强 家 每月 的 生活费用 = 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8220", "content": "减数 是 45 ， 被减数 是 92 ， 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7101", "content": "甲 数 是 305 ， 比 乙 数 少 84 ， 乙 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17299", "content": "甲 、 乙 两包 糖 的 质量 比 是 4 ： 1 ， 如果 从 甲 包 中 取出 10 克 放入 乙 包 后 ， 甲 、 乙 两包 糖 的 质量 比 变为 7 ： 8 ， 那么 甲 、 乙 两包 糖果 质量 的 总和 = 多少 克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "10532", "content": "学校 美术 小组 有 12 人 ， 是 书法 小组 人数 的 (3/5) ， 书法 小组 的 人数 是 音乐 小组 的 (5/8) ， 音乐 小组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18380", "content": "一 种 钢材 ， 现在 每吨 售价 1800 元 ， 比 原价 调 高 了 12.5% ， 原来 每吨 售价 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13722", "content": "小 明 和 小 刚 上学 同时 从 家 出发 ， 相向 而 行 ． 小 明 每分钟 走 60 米 ， 小 刚 每分钟 走 50 米 ． 18 分钟 后 ， 两 人 在 学校 相遇 ， 小 明 和 小 刚 家 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2604", "content": "新华书店 新 到 一批 书 ， 这 批 书 如果 每包 20 本 ， 要 捆 18 包 ． 如果 要 捆成 15 包 ， 每包 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14201", "content": "某 服装厂 原有 工人 500 人 ， 其中 女工 占 (4/5) ， 今年 又 招进 一批 女工 ， 这时 女工 占 总 人数 的 (5/6) ， 今年 又 招进 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20087", "content": "沿 一个 长方形 操场 4 周 种树 ， 每隔 4 米 种 一棵 ， 一共 种 了 30 棵 ． 这个 操场 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22337", "content": "一 个 书架 ， 上下 两层 ， 上层 存放 了 80 本书 ， 下层 存放 的 图书 比 上层 的 4 倍 还 多 12 本 ． 这个 书架上 一共 存放 了 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9917", "content": "修建 一幢 大楼 ， 用 去 1128 万元 ， 比 计划 节约 6% ， 原 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8490", "content": "甲 、 乙 两城 相距 520 千米 ， 一列 快车 从 甲 城 出发 ， 同时 一列 慢车 从 乙 城 开出 ， 两车 相向 而 行 ． 快车 每 小时 行 80 千米 ， 是 慢车 速度 的 1.6 倍 ， 经过 多少 时间 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6717", "content": "2.99 加上 多少 个 0.01 是 5 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1516", "content": "一 袋 米 用 去 了 (1/3) ， 再 加入 1.5 千克 ， 这时 袋 里 的 米 相当于 原来 的 (3/4) ， 这 袋 米 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9924", "content": "9899 再 添 上 1 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18201", "content": "某 电脑公司 4 月份 营业额 35 万元 ， 如果 按 营业额 的 5% 缴纳 营业税 ． 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5256", "content": "某 页 口 算 ， 小 明 做 了 5 分钟 ， 平均 每分钟 做 10 道 ， 还有 16 道 没 完成 ， 这 页 口 算 一共 有 多少 道 题 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3413", "content": "五年级 体育 “ 达标 ” 人数 比 四年级 多 (2/9) ， 实际 多 12 人 ． 四年级 体育 “ 达标 ” 的 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7187", "content": "矿泉水 每箱 24 瓶 ， 学校 买来 25 箱 这样 的 矿泉水 ， 一共 买 了 多少 瓶 矿泉水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20740", "content": "一 辆 客车 上午 9 时 从 甲地 出发 ， 14 时 到达 乙地 ， 这辆 客车 的 车速 是 每 小时 45 千米 ． 甲乙 两地 的 距离 = 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17185", "content": "从 76 里面 连续 减 8 ， 减 了 多少 次 还 剩 4 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4154", "content": "文具店 运进 一批 红 、 蓝墨水 ， 其中 红墨水 65 箱 ． 当 红墨水 售出 25 箱 ， 蓝墨水 售出 20% 后 ， 剩下 的 红 蓝墨水 相等 ． 原 运进 的 蓝墨水 有 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7646", "content": "星星 小学 一年级 有 男生 378 人 ， 女生 346 人 ． 已经 检查 身体 的 有 398 人 ， 没 检查 身体 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1368", "content": "一 个数 的 2 倍 + 1.8 的 和 是 16 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14290", "content": "学校 图书室 订阅 科技 书 和 童话 书 共 83 种 ， 其中 科技 书 38 种 ． 科技 书 比 童话 书 少 订阅 多少 种 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12390", "content": "妈妈 从 家 出发 到 学校 去 接 小 红 ， 妈妈 每分钟 走 75 米 ． 妈妈 走 了 3 分钟 后 ， 小 红 从 学校 出发 ， 小 红 每分钟 走 60 米 ． 再 经过 20 分钟 妈妈 和小红 相遇 ． 从小红 家 到 学校 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "3371", "content": "一 件 衣服 现价 320 元 ， 这件 衣服 的 价格比 原来 降低 了 80 元 ． 问 这件 衣服 的 价格比 原来 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17255", "content": "在 一条 长 60 米 的 公路 上 ， 每隔 6 米 种 一棵 杨树 （ 两端 都 种 ） ． 如果 只 种 一侧 ， 需要 多少 棵 树苗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10156", "content": "一年级 有 43 人 ， 二年级 的 人数 比 一年级 少 18 人 ， 二年级 有 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15329", "content": "一 条 公路 长 4600 米 ， 已经 修 了 25 天 ， 平均 每天 修 160 米 ， 还 剩下 多少 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8000", "content": "某 小学 750 名 学生 去年 参加 了 小学生 团体 平安保险 ， 每人 的 保险金额 是 4000 元 ， 保险费率 是 0.1% ． 去年 有 2 名 学生 因 意外事故 受伤 ， 每人 得到 保险公司 的 赔款 450 元 ． 这些 赔款 占 全校 缴纳 保险费 总数 的 百分之几 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1719", "content": "小 华 家 今年 收 玉米 6000 千克 ， 今年 比 去年 增产 25% ， 小 华 家 去年 和 今年 共 收 玉米 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18157", "content": "汽车 5 小时 行驶 375 千米 ， 飞机 4 小时 行驶 1800 千米 ， 飞机 时速 是 汽车 时速 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3634", "content": "把 42 米 长 的 铁丝 截 成 相等 的 小 段 ， 每 段长 (6/7) 米 ， 可以 截 成 几段 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1422", "content": "科技馆 播放 “ 火星 的 秘密 ” ， 每场 可 容纳 125 人 ， 每天 播放 6 场 ， 连播 了 4 天 还有 35 名 学生 没有 看到 ． 一共 有 多少 名 学生 要 看 “ 火星 的 秘密 ” ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7124", "content": "等差数列 1 、 3 、 5 、 … 、 197 、 199 共有 多少 项 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16637", "content": "修 一条 公路 ， 原 计划 每天 修 0.5 千米 ， 40 天 完成 ， 实际 每天 比 原 计划 多 修 0.3 千米 ， 实际 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17939", "content": "春节 到 了 ， 糖果店 要 配置 一种 礼品 糖 ， 所 需 奶糖 和 巧克力 的 质量 比 为 5 ： 3 ． 现 要 配置 这种 礼品 糖 ， 奶糖 和 巧克力 各 有 60 千克 ， 那么 当 奶糖 全部 用 完 时 ， 巧克力 还 剩 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9114", "content": "从 甲地 到 乙地 ， 其中 (3/10) 是 上坡路 ， (7/10) 是 下坡路 ． 一 人 在 甲乙 间 往返 一趟 ， 共 走 上坡路 5 千米 ， 那么 从 乙地 返回 甲地 时 行 上坡路 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15852", "content": "甲 数 是 20 ， 乙 数 是 甲 数 的 (1/6) ， 丙 数 是 乙 数 的 (6/5) ， 丙 数 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2788", "content": "多少 是 20 米 的 (7/10) ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9299", "content": "贺 林家 养鸡 的 只 数 是 鹅 的 6 倍 ， 鸭 比 鹅 多 8 只 ， 鸭 有 15 只 ． 贺 林 家养 了 多少 只 鸡 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15050", "content": "a型 电脑 的 键盘 有 104 个 键 ， 比 b型 钢琴 的 键 的 个数 的 2 倍 少 72 个 ， 则 b型 钢琴 的 键盘 有 多少 个 键 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22880", "content": "我国 火车 提速 后 ， 某 铁路干线 上 火车 速度 是 平均 每 小时 200 千米 ， 比 提速 前 每 小时 快 40 千米 ， 火车 速度 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9021", "content": "一 份 报纸 的 批发价 是 1.8 元 ， 零售价 是 2.5 元 ， 王 阿姨 星期天 卖报 赚 了 56 元 ， 她 卖出 了 多少 份 报纸 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9793", "content": "360 / 40 的 商 减去 100 与 95 的 差 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10185", "content": "买 一辆 汽车 ， 分期付款 要 多 加价 7% ， 如果 用 现金 购买 只 需 按 原价 的 95% 付款 ， 韦 老师 算了算 ， 发现 分期付款 比 现金 购买 要 多付 7200 元 ， 这辆 汽车 的 原价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17235", "content": "把 一根 钢管 截 成 6 段 ， 每 截 一次 用 3 分钟 ， 一共 要 用 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5358", "content": "(1/2) + 0.5 的 和 乘 12.75 与 (1/3) 的 差 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15205", "content": "明明 和 3 名 同学 到 公园 游玩 ， 他们 带 50 元 钱 买 门票 还 剩 18.8 元 ． 门票 每张 多少 元 钱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19757", "content": "一 辆 汽车 行 25 千米 耗油 2 升 ， 平均 每 升 油 能 行驶 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12112", "content": "粮库 有 大米 850 吨 ， 面粉 的 重量 是 大米 的 2 倍 ． 玉米 比 大米 、 面粉 重量 的 总和 少 30 吨 ， 玉米 有 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18233", "content": "小 南 、 小 北 和 小 东 参加 接力赛 ， 小 南 跑 第一 棒 ， 跑 完全 程 的 (1/3) 后 ， 把 接力棒 传给 小 北 ， 小 北 接着 跑 完全 程 的 (2/5) ， 把 接力棒 传给 小 东 ， 小 东 跑 到 了 终点 ， 小 东 跑 了 全程 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1584", "content": "妈妈 带 100 元 去 商店 ， 买 了 水壶 后 还 剩 57 元 ， 买 水壶 花 了 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2569", "content": "农场 养 了 348 只 公鸡 ， 295 只 母鸡 ． 养鸭 的 只 数 比 鸡 的 只 数多 68 只 ． 农场 养 了 多少 只 鸭 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13166", "content": "小 明 和 小 华 俩 人 各 有 一些 书 ， 小 明 借给 小 华 10 本书 后 ， 小 华 的 本 数 恰好 是 小 明 书 的 (4/5) ． 如果 小 明 原来 有 180 本书 ， 小 华 原来 有 书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22323", "content": "某 小区 新建 15 栋 楼房 ， 每栋 有 6 层 ， 每层 8 户 ， 新建 楼房 可以 住 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19903", "content": "食品店 运 来 奶油 饼干 10 千克 ， 比 巧克力 饼干 少 42 千克 ， 运 来 巧克力 饼干 多少 千克 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8815", "content": "小 华 和 小 明 各 集邮票 45 张 ， 小 华 的 邮票 给 小 明 5 张 ， 这时 ， 小 华 的 邮票 是 小 明 的 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21048", "content": "张师傅 将 一批 瓶装 矿泉水 装箱 ， 当 他 装满 15 箱 时 ， 发现 已 装 的 矿泉水瓶 数 比 这 批 矿泉水瓶 数 的 (4/7) 还 少 12 瓶 ， 接着 他 又 装满 13 箱 ， 正好 装完 ． 这 批 矿泉水 共有 多少 瓶 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9213", "content": "小 明 5 天 看 了 15 页 书 ， 照 这样 计算 ， 他 一个月 （ 30 天 ） 能 看 多少 页 书 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2429", "content": "为 有效 调控 过 快 上涨 的 房价 ， 国务院 于 2010 年 4 月 出台 一项 关于 住房贷款 的 新 政策 ： 家庭 购买 第 二 套 住房 ， 首付 比例 从不 低于 30% 上调 至 不 低于 50% ． 小 明 家 现在 打算 贷款 购买 一套 总价 为 45 万元 的 住房 （ 小 明 家 已有 一套 房子 ） ， 首付款 最少 需要 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22150", "content": "小 兰 的 妈妈 到 超市 买 毛线 ， 带 的 钱 刚好 够买 每千克 9.5 元 的 毛线 和 每千克 8.5 元 的 蓝 毛线 4 千克 ， 现在 她 想 用 这些 钱 买 每千克 12.5 元 的 黄 毛线 ， 可以 买 几千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21689", "content": "特快 列车 1 小时 约 行 120 千米 ， 6 小时 可行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14043", "content": "一 段 公路 长 60 千米 ， 已经 修 了 这 段 公路 的 (3/5) ， 已经 修 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19101", "content": "为 迎接 奥运 ， 学校 制作 了 一批 纸花 ， 其中 红花 375 朵 ， 比 黄花 多 25% ， 黄花 有 多少 朵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8824", "content": "一 张 桌 130 元 ， 一把 椅子 比 一张 桌子 便宜 63.5 元 ． 一张 桌子 和 一把 椅子 共 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4275", "content": "师徒 二 人 合 做 800 个 零件 ， 师傅 每 时 加工 50 个 ， 徒弟 每 时 加工 40 个 ， 师傅 有事 耽误 了 2 时 ， 完成 了 任务 后 ， 师傅 工作 了 多少 时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16457", "content": "蔬菜 批发市场 运 来 675 千克 黄瓜 ， 运 来 西红柿 的 重量 是 黄瓜 的 (7/9) ． 运 来 黄瓜 和 西红柿 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16360", "content": "一 个 梯形 的 上 底 是 7 厘米 ， 下 底 是 上 底 的 2 倍 ， 高 比 下 底 少 3 厘米 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7300", "content": "一 辆 公共汽车 上 原来 有 25 位 乘客 ， 到 人民 公园 后 ， 下去 9 人 ， 又 上 了 17 人 ， 现在 公共汽车 上 有 多少 位 乘客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13325", "content": "学校 买来 120 套 课桌椅 ， 每张 案子 的 价格 是 75 元 ， 每 把 椅子 的 价格 是 36 元 ， 学校 买 这些 课桌椅 一 共用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7431", "content": "李师傅 昨天上午 生产 80 个 零件 ， 下午 生产 100 个 零件 ． 今天 生产 的 是 昨天 的 (8/9) ． 今天 李师傅 生产 了 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9094", "content": "同学 们 参加 兴趣小组 ， 音乐 小组 有 27 人 ， 比 英语 小组 少 (2/5) ， 音乐 小组 比 英语 小组 少 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21809", "content": "学校 把 植 一批 树 的 任务 按 3 ： 4 ： 5 分给 4 、 5 、 六 3 个 年级 ， 五年级 植 了 40 棵 ， 这 批 树 共有 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1434", "content": "粮店 运进 一批 面粉 (5/4) 吨 ， 第一天 售出 (1/4) 吨 ， 第 二 天 售出 (1/5) 吨 ． 两天 一共 售出 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7245", "content": "丽丽 的 母亲 给 家中 汇款 1000 元 ， 按规定 汇费 是 汇款 的 1% ， 丽丽 的 母亲 应付 汇费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21896", "content": "乐 购 超市 在 国庆 期间 进行 薯片 促销 活动 ， 原价 每罐 7.8 元 ， 现在 以 买 3 送 1 的 形式 进行 “ 捆绑式 销售 ” ． 折算 下来 ， 现在 每罐 薯片 的 价格 相当于 原价 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13524", "content": "工程队 铺 一条 路 ， 如果 每天 铺 0.75 千米 ， 12 天 可以 铺 完 ． 如果 每天 多 铺 0.15 千米 ， 多少 天 可以 铺 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2163", "content": "0.6 * 1.2 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13289", "content": "一 批 水泥 ， 用 去 12 吨 ， 剩下 的 是 用 去 的 (1/4) ， 剩下 水泥 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11774", "content": "把 7.36 扩大 多少倍 是 7360 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20949", "content": "一 条 绳子 长 5 米 ， 第一次 用 去 它 的 (3/5) ， 第 二 次 用 去 它 的 (1/6) ， 还 剩 它 的 几分 之 几 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9751", "content": "一 个数 的 (1/2) 比 这个 数 的 25% 多 10 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15718", "content": "把 一根 钢管 截 成 3 段 需要 14.4 分钟 ， 照 这样 计算 ， 如果 把 一根 钢管 截 成 6 段 ， 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3087", "content": "有 10 箱 可乐 和 15 箱 水 ， 每箱 都 装 24 瓶 ， 一共 多少 瓶 饮料 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13173", "content": "三年级 一班 有 45 人 ， 每人 至少 参加 了 跳绳 、 长跑 两项 体育 活动 中 的 一项 ． 参加 跳绳 活动 的 有 28 人 ， 参加 长跑 活动 的 有 30 人 ， 两项 活动 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12519", "content": "有 大小 两种 包装 的 面粉 各 4 袋 ， 大袋 每包 75 千克 ， 小袋 每包 25 千克 ． 一共 有 多少 千克 面粉 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21518", "content": "王老师 把 一根 1 米 长 的 绳子 平均 截 成 3 段 ， 每 段 占 绳子 全长 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12520", "content": "学校食堂 有 一些 大米 ， 3 天 吃 了 (3/5) ， 还 剩 60 千克 ， 这些 大米 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13247", "content": "新兴 机床厂 要 生产 720 台 机床 ． 计划 每天 生产 80 台 ， 实际 每天 比 计划 多 生产 10 台 ， 实际 多少 天 可 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14564", "content": "修路 队 要 修 一段 公路 ． 第一天 修 了 全长 的 25% ， 第 二 天 修 了 70 米 ， 这时 已修 的 和 未 修 的 长度 比 是 3 ： 2 ， 这 段 公路 有 多长 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9675", "content": "学校 美术 展览 中 ， 有 40 幅 水彩画 ， 50 幅 蜡笔画 ， 蜡笔画 比 水彩画 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10083", "content": "一 件 衣服 原价 是 45 元 ， 打 0.8 后 ， 现在 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7422", "content": "甲乙 两地 相距 300 千米 ， 一辆 汽车 由 甲地 开出 5 小时 后 ， 距离 乙地 还有 74.5 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "982", "content": "甲 、 乙 两艘 轮船 同时 从 天津 沿 同一 航线 开往 武汉 ， 甲 船 每 小时 行 26.8 千米 ， 经过 12.5 小时 乙 船 超过 甲 船 7.5 千米 ． 乙 船 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20248", "content": "一 台 收录机 485 元 ， 王老师 买 了 2 台 ， 付 了 1000 元 ， 应 找回 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17322", "content": "12 元 钱 可以 买 3 辆 汽车 ， 那么 小 明 想 买 5 辆 小汽车 ， 需要 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22704", "content": "甲 数 是 120 ， 比 乙 数多 40 ， 乙 数 恰好 等于 丙 数 的 (5/6) ， 丙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11620", "content": "一 台 拖拉机 要 耕 9.6 公顷 地 ， 前 3 小时 耕 了 3.6 公顷 ， 照 这样 计算 ， 剩下 的 几小时 耕 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13515", "content": "爸爸 的 身高 是 180 厘米 ， 小 刚 的 身高 是 爸爸 的 (7/9) ， 小 刚 的 身高 = 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11052", "content": "在 国庆 长假 里 ， 超市 前 3 天 共 完成 销售额 3.52 亿元 ， 后 4 天 平均 每天 完成 销售额 1.85 亿元 ｡ 国庆 长假 间 ， 超市 平均 每天 的 销售额 = 多少 亿元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8889", "content": "57 / □ = 9 … 3 ， 方框 里 应 填 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5325", "content": "8.28 / 3.6 与 0.5 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19121", "content": "19.38 * 39 + 193.8 * 1.7 + 1.938 * 440 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "14299", "content": "一 个 正方体 的 容器 ， 棱 长 12 厘米 ， 装满水 后 ， 倒入 一 底面 长 20 厘米 ， 宽 15 厘米 ， 高 18 厘米 的 长方体 容器 中 ， 现在 水 的 深度 = 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11591", "content": "把 12 支 铅笔 看做 一个 “ 整体 ” ， 它 的 (5/6) = 多少 支 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4254", "content": "2 个人 (7/2) 天 吃 35 个 馒头 ， 平均 每个 人 每天 吃 几个 馒头 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19152", "content": "由于 采用 了 高新技术 ， 某 产品 现在 每件 成本 是 45 元 ， 比 原来 降低 了 25% ， 原来 每 件产品 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2580", "content": "一 辆车 平均 每 小时 行 48 千米 ， 5 小时 到达 目的地 ． 如果 平均 每 小时 行 60 千米 ， 可以 提前 几小时 到达 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11138", "content": "小 刚 和 同学 一共 买 了 3 枝 钢笔 ， 付给 营业员 20 元 ， 找回 0.8 元 ， 平均 每枝 钢笔 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4876", "content": "69 + 18 + 23 + 31 + 82 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "1298", "content": "长方形 的 长 是 8 cm ， 宽比 长短 2 cm ， 这个 长方形 的 周长 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6507", "content": "人 骑 自行车 的 速度 是 16 千米 / 时 ， 小 王 双休日 骑车 15 时 ， 求 他 所 行 的 路程 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22104", "content": "操场上 原来 有 30 个 同学 ， 又 来 25 个 同学 ． 这些 同学 5 人 排 一行 ， 可以 排 多少 行 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14605", "content": "一 本书 共 200 页 ， 已经 看 了 50 页 ， 已经 看 了 这 本书 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2581", "content": "一 个 因数 是 126 ， 另 一个 因数 是 15 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9724", "content": "新华书店 有 故事书 1072 本 ， 是 科技 书 的 4 倍 ， 连环画 的 本 数 比 科技 书 的 3 倍 还 多 20 本 ， 连环画 有 多少 本 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1792", "content": "师傅 每分钟 织布 (1/5) 米 ， 徒弟 8 分钟 织 的 布 和 师傅 6 分钟 织 的 布 同样 多 ， 徒弟 每分钟 织布 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22205", "content": "甲 、 乙 两车 a 、 b 两地 同时 出发 相向 行驶 ， 8 分钟 相遇 ． 若 甲 车 每分钟 少 行 180 米 ， 乙 车 每分钟 多行 230 米 ， 7 分钟 相遇 ． a 、 b 两地 的 距离 = 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14825", "content": "双 鹿 毛线 0.8 千克 卖 46 元 ， 平均 每千克 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22474", "content": "一 车间 有 32 名 工人 ， 5 月份 前 9 天 共 加工 零件 14400 个 ． 平均 每个 工人 每天 加工 零件 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7267", "content": "兵 兵家 去年 比 今年 少收 500 千克 葡萄 ， 今年 收 葡萄 比 去年 增产 8% ， 今年 收 葡萄 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4374", "content": "0.9 是 9 个 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17146", "content": "张大妈 家 上个月 用 了 8 吨 水 ， 水费 是 12.8 元 ． 李 奶奶家 上个月 用 了 10 吨 水 ， 李 奶奶家 上个月 的 水费 = 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16117", "content": "一 幢 高 59 米 的 楼房 ， 第一层 的 层高 4.6 米 ， 其余 每层 的 层高 都 是 3.2 米 ， 这幢 楼房 一共 有 几层 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8104", "content": "一 根 钢管 ， 如果 截去 它 的 40% 后 ， 还 剩 2.4 米 ； 如果 截去 它 的 (1/3) ， 还 剩 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13265", "content": "新村 今年 修 了 2 条 乡村 公路 ， 总长 960 米 ， 是 去年 的 3 倍 ， 今年 比 去年 多 修 了 多少 米 公路 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9786", "content": "计算 ： 197 * 198 - 196 * 199 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19652", "content": "甲 树 是 500 ， 甲 数 是 已 数 的 4 倍 ， 乙 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16978", "content": "某 玩具厂 计划 30 天 生产 玩具 6000 件 ， 实际 比 计划 提前 5 天 完成 ． 实际 每天 生产 玩具 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16663", "content": "化肥厂 计划 全 月 生产 化肥 2400 吨 ， 实际上 半月 完成 计划 的 (7/12) ， 下半月 生产 的 和 上 半月 同样 多 ， 实际 超产 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13183", "content": "甲 数 比 乙 数多 (1/6) ， 乙 数 比 甲 数 少 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22258", "content": "在 一条 公路 的 一旁 种 了 8 棵 柳树 ， 每 两棵 柳树 之间 相距 5 米 ， 这 条 公路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18227", "content": "打 一份 稿子 ， 已经 打 了 30% ， 剩下 的 如果 每分钟 打 98 个 字 ， 40 分钟 可以 打 完 ， 这 篇 稿子 共 多少 字 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7912", "content": "星星 服装厂 要 为 亚运会 闭幕式 赶制 一批 表演 服装 1200 件 ， 原 计划 每天 做 100 件 ． 4 天 以后 ， 提高 了 工作效率 ， 每天 比 原 计划 多 做 60 件 ． 这样 比 原 计划 提前 几天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "13966", "content": "山羊 有 15 只 ， 绵羊 的 只 数 是 山羊 的 3 倍 ， 山羊 和 绵羊 一共 有 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19105", "content": "一 个 电器厂 原 计划 21 天 生产 电冰箱 4200 台 ． 实际 每天 生产 210 台 ， 实际 比 原 计划 提前 几天 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20629", "content": "某 宾馆 9 月份 营业 收入 85000 元 ， 应 缴 税款 5100 元 ， 营业税 率 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4297", "content": "一 根 长 (7/8) 米 的 绳子 ， 用 去 一部分 后 还 剩 (4/5) ， 还 剩 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3856", "content": "李 刚 看 一 本书 ， 第一天 看 了 (1/4) ， 第 二 天 看 了 60 页 ， 这时 看 了 的 与 未 看 的 页数 比 是 2 ： 3 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2943", "content": "2010 全国 粮食 生产 克服 了 前期 干旱 的 不利 局面 ， 取得 了 大丰收 ． 以东 乐 乡 为 例 ， 粮食 总产量 达 4.73 万斤 ， 比 上年 增产 了 10% ， 上一年 粮食产量 = 多少 万斤 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4951", "content": "(35/56) * (4/7) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7299", "content": "某 工厂 第一个 月 用 煤 3.5 吨 ， 比 第 二 个 月 多 (1/5) 吨 ， 两个 月 共用 煤 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7507", "content": "五年级 有 144 人 ， 比 六年级 的 (5/6) 少 6 人 ． 六年级 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15694", "content": "一 种 商品 ， 按 成本 的 120% 定价 后 打 0.9 出售 ， 结果 赚 了 400 元 ， 这种 商品 的 成本 = 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9598", "content": "一 个 修路 队 ， 第一天 修 了 全程 的 (2/5) ． 第一天 比 第 二 天 少 修 全程 的 (1/10) ， 两天 正好 修 70 km ， 该 路 全长 多少 km ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12639", "content": "把 一根 192 厘米 长 的 木条 锯 成 16 厘米 长 的 小 段 ， 一共 要 锯 多少 次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3711", "content": "花园 小区 1 号 楼 共有 7 个 单元 ， 每个 单元 住 14 户 ． 这幢 楼房 共 住 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12032", "content": "某 公司 预算 一天 的 开支 为 9600 元 ， 实际 比 预算 节约 了 (3/8) ， 该 公司 一天 节约开支 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4149", "content": "一 个 直角三角形 ， 它 的 两条 直角 边 分别 是 6 cm 和 8 cm ， 它 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7407", "content": "雅乐 学校 买来 2 张 课桌 和 9 把 椅子 共用 去 300 元 ， 买 一张 桌子 的 价格 与 买 3 把 椅子 的 价格 相等 ， 每张 桌子 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5591", "content": "某 文具店 有 一种 钢笔 原来 每枝 16 元 ， 现在 推出 “ 买 3 枝 送 1 枝 ” ， 小惠 买 4 枝 这样 的 钢笔 需要 准备 多少 元 人民币 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10803", "content": "多少 / 23 = 30 … 22 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4391", "content": "已知 两个 数 的 积 是 39.9 ， 一个 因数 是 19 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13063", "content": "(7/15) / (1/3) 的 商 加上 (9/14) 与 (5/14) 的 差 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20730", "content": "一 张 纸 从左往右 数 有 8 个 格子 ， 从 上 往 下 数 有 5 个 格子 ， 一共 有 多少 个 格子 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6526", "content": "一 批 零件 ， 计划 每天 做 800 个 ， 6 天 就 能 完成 ． 实际 比 计划 提前 1 天 完成 ， 实际 每天 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21221", "content": "小 明 有 一枝 18 厘米 的 铅笔 ， 第一周 用 去 (1/3) ， 第 二 周 用 去 (1/4) ， 两周 一 共用 去 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10789", "content": "沿江 粮店 运进 一批 大米 ， 第一天 上午 售出 35% ， 下午 售出 这 批 米 的 20% ； 第 二 天 售出 了 余下 的 75% ， 两天 后 还 剩 3690 千克 ． 这 批 大米 共有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "20687", "content": "一 只 微波炉 450 元 ， 比 一台 复读机 贵 75 元 ， 一台 电冰箱 的 价钱 是 复读机 的 8 倍 ， 电冰箱 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10736", "content": "一 本 故事书 共 135 页 ， 第一天 从 第一页 看 起 ， 看 了 全书 的 (2/5) ， 第 二 天 接着 看 ， 从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10090", "content": "生产 一批 零件 ， 甲 每 小时 可以 生产 16 个 ， 乙 单独 生产 需要 12 小时 完成 ， 现在 由 甲 、 乙 两 人 合 做 ， 完成 任务 时 ， 甲 生产 的 零件 数量 是 乙 的 80% ， 批 零件 有 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15741", "content": "小 玲 的 身高 是 135 厘米 ， 小强 比 小 玲 高 (1/5) ， 小强 比 小 玲 高 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18735", "content": "如果 每千克 葵花籽 可以 榨油 0.18 千克 ， 小 明 家 今年 共 榨 葵花油 45 千克 ． 小 明 家 今年 用于 榨油 的 葵花籽 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8838", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 全程 (2/5) ， 如果 再行 60 千米 就 到达 乙地 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17568", "content": "有 47 千克 糖果 ， 卖出 了 3.5 千克 ， 剩下 的 每 2.9 千克 装 一盒 ， 可以 装 多少 盒 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22158", "content": "一 只 文具盒 的 价格 是 13.15 元 ， 一枝 钢笔 的 价格 是 这 只 文具盒 的 3 倍 ． 买 一枝 钢笔 和 一只 文具盒 共 要 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15861", "content": "某 工厂 生产 4500 个 零件 ， 计划 每天 做 300 个 ， 比 实际 少 做 75 个 ， 完成 任务 实际 需 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5110", "content": "菜谱 里 有 2 个 荤菜 ， 4 个 素菜 ， 一荤一素 一共 有 多少 种 不同 的 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15817", "content": "一 只 山雀 12 天 大约 能 吃 900 只 害虫 ， 照 这样 计算 ， 一只 山雀 一年 大约 能 吃 多少 只 虫 ？ （ 平均 每个 月 都 按 30 天 计算 ． ）", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17310", "content": "汇文 书店 优惠 出售 一批 图书 ， 第一天 卖 了 这 批 图书 的 40% ， 第 二 天 又 卖 了 600 本 ， 这时 已经 卖出 的 本 数 和 没有 卖 的 本 数 之 比 是 11 ： 4 ， 这 批 图书 共有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16605", "content": "检修 工 检修 电线 线路 ， 第一天 检修 了 728 米 ， 第 二 天 检修 的 比 第一天 多 135 米 ， 两天 共 检修 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14180", "content": "一 种 盐水 是 用 盐 和 水 按照 1 ： 9 配成 的 ． 要 配制 这种 盐水 180 千克 ， 需要 水 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22833", "content": "一 根 电线 ， 第一次 用 去 全长 的 (1/6) ， 第 二 次 用 去 全长 的 (1/2) ， 两次 共用 去 全长 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2171", "content": "1 头牛 换 6 头 猪 ， 2 头 猪 换 4 只 羊 ， 3 只 羊 换 20 只 鸡 ， 400 只 鸡 可 换 多少 头牛 ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21770", "content": "洪峰 农机厂 去年 计划 生产 抽水机 500 台 ， 实际 生产 625 台 ． 超额完成 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1596", "content": "一 个 电影院 有 普通 座 和 嘉宾 座 两种 座位 ， 普通 座 有 37 排 ， 每排 有 51 个 座位 ， 嘉宾 座 有 9 排 ， 每排 有 26 个 座位 ， 那么 这个 电影院 一共 能 容纳 多少 人 同时 观看 影片 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21974", "content": "小 灵 在 计算 220 - □ * 3 时 先 算了 减法 ， 结果 得出 130 ． 那么 这 道 题 的 正确 结果 应该 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17872", "content": "一 个 滴水 的 水龙头 一天 要 浪费 35 千克 的 水 ， 如果 这个 水龙头 像 这样 一直 地 下去 的话 ， 一年 （ 按 365 天 计算 ） 将 浪费 多少 千克 的 水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11820", "content": "李 明 收集 邮票 42 枚 ， 王 红 收集 的 邮票 比 李 明 多 (2/7) ． 李 明 比 王 红 少 收集 邮票 多少 枚 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6999", "content": "某校 六年级 学生 举行 棋类 比赛 ， 获奖 的 人数 占 总 人数 的 40% ， 获奖 的 (2/3) 是 男生 ， 获奖 的 女生 占 总 人数 的 几分 之 几 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7579", "content": "一 个数 的 5 倍 是 750 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9153", "content": "李师傅 的 上 月 奖金 3400 元 ， 如果 超过 2000 元 的 部分 按 15% 缴纳 个人所得税 ， 他 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20540", "content": "如果 红 绳 比 绿 绳 长 (1/4) ， 那么 绿 绳 比 红 绳 短 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21257", "content": "五年级 有 女生 240 人 ， 男生 比 女生 少 10% ． 五年级 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3355", "content": "一 种 服装 ， 原价 500 元 ， 现在 售价 400 元 ， 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21271", "content": "在 一条 路 的 一侧 从头到尾 种树 ， 每隔 15 米 种 一棵树 ， 共 种 41 棵 ， 这 条 路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8409", "content": "6 （ 1 ） 班 有 50 名 学生 ， 一天 的 出勤率 是 96% ， 这天 有 多少 人 缺勤 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3378", "content": "实验 小学 有 男生 750 人 ， 女生 人数 是 男生 的 (4/5) ． 实验 小学 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16794", "content": "a 、 b 两地 相距 336 千米 ， 一辆 货车 从 a 地 到 b 地 已 行驶 了 168 千米 ， 用 了 4 小时 ， 照 这样 计算 ， 它 从 a 地 出发 到 b 地 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17547", "content": "果园 里 有 桃树 208 棵 ， 比 苹果树 多 44 棵 ， 梨树 的 棵 数 又 比 苹果树 多 (1/4) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22308", "content": "有 篮球 9 个 ， 足球 的 个数 是 篮球 的 8 倍 ， 足球 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7820", "content": "一 个 运输队 包运 1998 套 玻璃 茶具 ． 运输 合同规定 ： 每套 运费 以 1.6 元 计算 ， 每 损坏 一套 ， 不仅 不得 运费 ， 还要 从 总 费 中 扣除 赔偿费 18 元 ． 结果 这个 队 实际 得 运费 3059.6 元 ． 在 运输 过程 中 被 损坏 的 茶具 套数 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14916", "content": "两辆 汽车 从 相距 1230 千米 的 甲乙 两地 同时 出发 ， 相向 而 行 ， 甲 车 每 小时 行 49.8 千米 ， 乙 车 每 小时 行 52.7 千米 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19250", "content": "学校 与 少年宫 相距 1860 米 ， 小 刚 每分钟 走 60 米 ， 小 军 每分钟 走 62 米 ． 从 学校 到 少年宫 小 军 比 小 刚 少 走 了 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5894", "content": "一 本书 ， 这个 星期 的 前 3 天 我 看 了 78 页 ， 后 4 天 我 看 了 余下 的 125 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3621", "content": "甲 、 乙 两只 蚂蚁 ， 同时 从 一根 绳子 的 两端 向 中间 爬 ， 20 分钟 后 相距 6 米 ， 这时 甲 爬 了 全长 的 40% ， 乙 爬 了 全长 的 75% ， 问 这根 绳子 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9428", "content": "水 是 由 氢气 和 氧气 1 ： 8 的 质量 比 反映 生成 的 ， 现在 有 50 千克 氢气 ， 需要 多少 氧气 才能 生成 相应 量 的 水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12251", "content": "小 明 买 书 用 去 7.2 元 ， 买 钢笔 用 去 2.6 元 ， 付给 售货员 10 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3780", "content": "红豆 专卖店 为 搞 开业 周年 庆典 ， 所有 皮鞋 优惠 30% ， 原来 卖 180 元 一双 的 皮鞋 ， 现在 卖 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16394", "content": "粮食 仓库 第一天 运走 了 原有 粮食 总数 的 (1/5) ， 第 二 天 又 运进 了 48 吨 ， 这时 仓库 里 的 粮食 是 原有 粮食 的 (22/25) ． 仓库 原有 粮食 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19556", "content": "一 个 平行四边形 的 面积 是 48 平方米 ， 它 的 底 是 10 米 ， 高 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22224", "content": "小强 每天 早上 跑步 21 分钟 ， 他 的 速度 是 120 米 / 分 ， 小强 每天 早上 大约 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2423", "content": "某 机床厂 第一 车间 的 职工 ， 用 18 台 车床 ， 2 小时 生产 机器 零件 720 件 ， 20 台 这样 的 车床 3 小时 可 生产 机器 零件 多少 件 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11080", "content": "菜农 们 准备 把 摘下 的 西红柿 装箱 运往 市场 ， 如果 每箱 装 24 千克 ， 可以 装 成 35 箱 ， 如果 每箱 装 20 千克 ， 菜农 们 应该 准备 多少 只 箱子 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23090", "content": "3 辆 卡车 共运 480 箱 苹果 ， 照 这样 计算 ， 再 增加 4 辆 卡车 ， 一共 可以 运 多少 箱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3496", "content": "5 （ 1 ） 班 有 25 人 参加 了 学校 的 书法 小组 和 舞蹈 小组 ， 其中 15 人 参加 了 书法 小组 ， 有 18 人 参加 了 舞蹈 小组 ， 有 多少 人 这 两个 小组 都 参加 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1326", "content": "春阳 小学 四年级 有 4 个 班 ， 每个 班 买 8 本 《 童话故事 书 》 ， 一 共用 了 768 元 ． 平均 每 本书 用 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16813", "content": "被减数 是 1000 ， 差 是 668 ， 减数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10364", "content": "六年级 学生 去 博物馆 参观 ， 共用 去 8 小时 ． 其中 路上 用 去 的 时间 占 (1/8) ， 吃 午饭 与 休息时间 共 占 (3/16) ， 剩下 的 是 游览 的 时间 ， 游览 的 时间 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11941", "content": "计算 ： 3.71 - 2.74 + 4.7 + 5.29 - 0.26 + 6.3 = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "5062", "content": "大 青蛙 每天 捉 害虫 175 只 ， 小 青蛙 每天 捉 害虫 25 只 ， 大 青蛙 每天 捉 的 害虫 是 小 青蛙 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12", "content": "要 修 一条 长 3120 米 的 公路 ， 原 计划 48 天 完成 ， 实际 每天 多 修 15 米 ． 这样 要 多少 天 才能 修 完 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22243", "content": "甲乙 两站 相距 不到 400 千米 ， a 、 b 两列 火车 从 甲乙 两站 相对 开出 ， a 行至 210 千米 处 停车 ， b 行至 270 千米 处 也 停车 ． 这时 两车 相距 正好 是 甲乙 两站 距离 的 (1/3) ， 问 甲乙 两站 之间 的 距离 = 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10168", "content": "小 丁丁 要 练习 写 270 个 毛笔字 ， 写 了 5 天 后 还 剩下 105 个 ， 平均 每天 写 了 多少 个 毛笔字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6036", "content": "汽车 上山 的 速度 为 36 千米 / 时 ， 行 了 5 小时 到达 山顶 ， 下山 按 原 路 返回 只用 了 4 小时 ， 汽车 下山 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1484", "content": "市图书馆 有 文学 图书 23184 册 ， 比 科技 类图书 多 7576 册 ， 文学 图书 和 科技 类图书 共有 多少 册 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3327", "content": "有 一只 羊 重 35 千克 ， 是 一条 小狗 重量 的 5 倍 ， 一头 猪 的 重量 是 这 条 狗 的 24 倍 ， 这 头 猪 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15044", "content": "水果店 运进 一批 水果 ， 第一天 卖 了 60 千克 ， 正好 是 第 二 天 卖 的 (2/3) ， 两天 共 卖 了 全部 水果 的 (1/4) ， 这 批 水果 原有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2729", "content": "3 （ 2 ） 班 有 45 人 ， 其中 有 38 人 喜欢 学习 语文 ， 有 35 人 喜欢 学习 数学 ． 请 你 算 一 算 ， 既 爱 学习 语文 又 爱 学习 数学 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16780", "content": "张 亮 从 甲 城 到 乙 城 ， 第一天 行 了 全程 的 40% ， 第 二 天 行 了 全程 的 (9/20) ， 距 乙 城 还有 900 米 ， 甲乙 两城 相距 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19603", "content": "小 明 看 一本 故事书 ， 他 平均 每天 看 12 页 ， 这样 他 3 天 共 看 了 整本书 的 (2/3) ， 这本 故事书 共有 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8376", "content": "小 明 与 哥哥 两 人 同时 从 家 出发 去 公园 ， 哥哥 骑 自行车 ， 小 明 步行 ， 10 分钟 后 哥哥 到 公园 时 ， 小 明 距离 公园 还有 1200 米 ． 己 知 哥哥 骑车 的 速度 是 小 明 步行 速度 的 3 倍 ． 小 明 步行 每分钟 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21182", "content": "王 东 小学 扩建 教学楼 ， 原 计划 投资 40 万元 ， 实际 用 了 36 万元 ， 实际 比 计划 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19632", "content": "明明 过生日 ， 请来 了 6 小朋友 ， 每人 一个 饭碗 ， 2 人 一个 菜 碗 ， 3 人 一个 汤碗 ， 请 你 帮 他 算算 ， 他们 共用 了 几个 碗 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6737", "content": "48 - 3.2 与 1.5 的 积 ， 再 加上 6.9 ， 得 多少 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2529", "content": "□ / 6 = 13 … 5 ， □ 中 应 填 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10422", "content": "除数 是 19 ， 商 是 24 ， 余数 是 7 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14683", "content": "梅花鹿 高 1.34 米 ， 长颈鹿 的 身高 是 梅花鹿 身高 的 2.5 倍 还 多 0.82 米 ， 长颈鹿 的 身高 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "88", "content": "电视机厂 今年 生产 电视机 36000 台 ， 去年 产量比 今年 多 (1/4) ， 去年 生产 多少 台 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14883", "content": "商店 出售 的 一种 电视机 比 原来 降价 (13/50) ， 正好 降低 了 650 元 ， 你 知道 这种 电视机 现价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19178", "content": "一 根 水管 ， 第一次 截去 全长 的 (1/4) ， 第 二 次 截去 余下 的 (2/3) ， 两次 共 截去 全长 的 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11875", "content": "小 明 有 48 张 邮票 ， 他 把 邮票 的 (1/3) 送给 小 新 后 ， 两 人 的 邮票 就 同样 多 了 ， 你 知道 小 新 原来 有 多少 张 邮票 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18454", "content": "甲乙 两队 修 一条 公路 ． 甲队 已修 24 千米 ， 占 公路 长 的 (1/3) ， 乙 队 已修 的 长度 占 公路 全长 的 (1/4) ， 乙 队 修 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8811", "content": "已知 两个 因数 的 积 是 4.2 ， 其中 一个 因数 是 7 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21987", "content": "仓库 运 来 含水量 为 90% 的 水果 100 千克 ， 1 星期 后 再 测 发现 含水量 降低 了 ， 变为 80% ， 现在 这 批 水果 的 总重量 = 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17506", "content": "爸爸 每月 收入 1600 元 ， 妈妈 每月 收入 1400 元 ， 用 家庭 月 收入 的 一部分 做 生活费 ， 一部分 还 银行贷款 ． 全家 每月 生活费 占 家庭 总收入 的 (5/8) ， 全家 每月 生活费 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21330", "content": "学校 图书室 准备 购买 两种 新书 ， 一种 是 《 百科全书 》 ， 每套 128 元 ； 另 一种 是 《 大自然 探索 》 ， 每套 35 元 ． 每种 买 5 套 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8713", "content": "一 列 火车 7 时 从 甲地 开出 ， 17 时 到达 乙地 ， 火车 每 小时 行 75 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13164", "content": "风光 书店 买来 科技 书 420 本 ， 连环画 比 科技 书 多 (3/5) ， 连环画 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12682", "content": "从 果园 运走 8400 千克 梨 ， 比 运走 苹果 千克 数 的 4 倍 少 100 千克 ， 运走 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1044", "content": "学校 购进 一批 图书 ， 如果 平均 分给 12 个 班 ， 每班 可 得 25 本 ， 如果 平均 分给 15 个 班 ， 每班 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14933", "content": "12.1 - 3.4 / 10.2 的 商 ， 结果 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14988", "content": "小 青 读 一本 课外书 ， 原 计划 18 天 读完 ， 每天 读 35 页 ， 如果 要 提前 3 天 读完 ， 平均 每天 应 读 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "510", "content": "养鸡场 养 了 213 只 小鸡 ， 养 的 大 鸡 的 只 数 是 小鸡 的 2 倍 ， 养鸡场 一共 养 了 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13881", "content": "果园 共有 果树 600 棵 ， 其中 (2/5) 苹果树 ， 香蕉 树 的 棵 数 是 苹果树 的 (2/3) ， 香蕉 树种 了 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16556", "content": "35 * 2 * 5 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16458", "content": "一 列 火车 的 速度 是 145 千米 / 时 ， 从 甲地 到 乙地 行 了 24 小时 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4401", "content": "张老师 买 了 5 支 圆珠笔 和 4 本 笔记本 ， 共用 去 23.7 元 ， 每 本 笔记本 2.8 元 ， 每支 圆珠笔 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16439", "content": "一 列 火车 从 甲 站 到 乙 站 一 共用 了 20 时 ， 每 小时 行 120 千米 ． 返回 时 用 了 30 小时 ， 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11035", "content": "某 新建 小区 有 112 栋 楼 ， 每栋 63 套房 ， 还有 56 套 未 住 人 ， 多少 套 已 住 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4615", "content": "一 条 公路 ， 已修 了 40% ， 正好 是 28 千米 ． 这 条 路 全长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7414", "content": "35 + 150 与 15 的 差 ， 再 乘 16 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8921", "content": "小强 比 小 明 矮 0.03 米 ， 比 小林 高 0.05 米 ， 已知 小 明 身高 1.32 米 ， 小林 身高 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11607", "content": "小汽车 从 甲地 开往 乙地 ， 行驶 5 小时 后 ， 剩下 的 路程 如果 同样 的 速度 行驶 ， 预计 还要 8 小时 ． 已知 剩下 的 路程 比 已 行 的 多 360 千米 ， 小汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21517", "content": "食堂 买 回 12.5 千克 花生油 ， 每千克 花生油 的 售价 是 9.8 元 ． 采购员 付给 收银员 150 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14807", "content": "有 8 个 蓝色 球 ， 6 个 红色 球 ， 3 个 黄色 球 放入 黑色 口袋 ， 任意 摸 球 ， 至少 摸 多少 个 才能 保证 3 色 都 有 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16184", "content": "小客车 上 的 乘客 人数 是 小轿车 的 3 倍 ． 中型 客车 载客 16 人 ， 中型 客车 上 载客 数 是 小客车 和 小轿车 两个 的 和 ． 小轿车 上 有 多少 为 乘客 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17615", "content": "水果 批发店 ， 用 6 辆 大卡车 和 4 辆 小 卡车 共运 43 吨 水果 ， 小 卡车 每辆 运 2.5 吨 ， 大卡车 每辆 运 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11283", "content": "3 辆 汽车 5 天 可以 运送 货物 187.5 吨 ， 那么 每辆 汽车 平均 每天 运 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14323", "content": "光明 小学 共有 学生 650 人 ， 五年级 学生 人数 是 全校学生 人数 的 (1/5) ， 六年级 男生 人数 占 五年级 学生 人数 锝 (7/13) ， 六年级 有 男生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3614", "content": "蜜蜂 酿 10 克 蜜 要 采 蜜 50 次 ， 平均 采 一次 蜜 可以 酿 蜂蜜 多少 克 ？ （ 用 分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2065", "content": "一 段 铁丝 ， 用 掉 它 的 (3/8) 后 ， 还 剩 40 米 ， 这 段 铁丝 原有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5848", "content": "张 村 今年 植树 的 成活率 是 98% ， 死 了 5 棵 ， 总 植树 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2408", "content": "从 第 1 根 栏杆 到 第 5 根 栏杆 是 3 米 ． 小 丽 数着 沿江路 一共 有 614 根 栏杆 ， 沿江路 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9557", "content": "一 辆 汽车 在 高速公路 上 匀速 行驶 ， 2 小时 行驶 了 160 千米 ， 汽车 的 速度 = 多少 千米 / 时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16479", "content": "一 本 故事书 ， 已经 看 了 30 页 ， 正好 看 了 全书 的 (1/4) ， 这本 故事书 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6782", "content": "一 个数 除以 12 ， 商 和 余数 都 是 7 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16831", "content": "电视机厂 十 月份 生产 电视机 6000 台 ， 比 计划 多 生产 了 1000 台 ， 实际 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8308", "content": "同学 们 植树 ， 植 的 柳树 的 棵 数 比 杉树 的 3 倍 少 20 棵 ． 柳树 植 了 190 棵 ， 杉树 植 了 多少 棵 ？ 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10089", "content": "要 给 奶奶 寄 2000 元 ． 要 交 1% 的 汇费 ， 汇费 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13232", "content": "一 个 电视机厂 ， 去年 彩色 电视机 的 产量 与 电视机 总产量 的 比 是 (9/20) ． 去年 共 生产 电视机 250000 台 ， 其中 彩色 电视机 有 多少 台 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14331", "content": "买 一台 学习机 需要 328 元 ， 买 5 台 这样 的 学习机 需 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15353", "content": "星期天 ， 工人 师傅 到 学校 修 桌椅 ， 已经 修好 了 (5/8) ， 正好 修 了 50 套 ． 一共 要 修 多少 套 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16104", "content": "甲 数 的 (2/3) 和 乙 数 的 (3/4) 相等 ， 若 甲 数 是 45 ， 则 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19475", "content": "0.5 里 有 多少 个 0.01 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17556", "content": "一 共有 240 千克 水果糖 ， 每 袋装 (1/4) kg ． 他们 才 装完 了 (3/4) ． 他们 已经 装完 了 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2765", "content": "一 个 会议厅 计划 铺地砖 ， 用 900 块 边长 80 cm 的 方砖 刚好 铺满 ， 方砖 每块 45 元 ， 铺 方砖 的 其他费用 需 3400 元 ． 铺 好 这个 会议厅 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19927", "content": "在 一次 测试 中 ， 张 良 伟 数学 考 了 80 分 ， 刘 仁 杰 的 分数 比 张 良 伟 多 考 (1/8) ， 刘 仁 杰 考 了 多少 分 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22684", "content": "一 件 羽绒服 原价 198 元 ， 元旦 促销 降价 40% ， 现价 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8518", "content": "王奶奶 买 肉 和 青菜 一共 花 了 38.6 元 ， 其中 青菜 花 了 24.2 元 ． 买 青菜 比 买 肉 多 花 了 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7372", "content": "一 桶 油 用 去 (2/5) ， 还 剩下 48 千克 ， 这 桶 油 原来 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "907", "content": "明明 一家 去 时 速度 是 45 千米 / 时 ， 行 了 8 小时 到达 ． 回来 时 由于 车辆 较 多 ， 速度 是 36 千米 / 时 ， 他们 回来 用 了 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13019", "content": "一 只 鸭 2 条 腿 ， 8 只 鸭 多少 条 腿 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "54", "content": "一 个数 除以 24 ， 商 和 余数 都 是 19 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "380", "content": "四年级 学生 参加 象棋 兴趣小组 的 人数 有 28 人 ， 比 参加 书法 兴趣小组 人数 的 60% 少 2 人 ． 参加 书法 兴趣小组 的 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12953", "content": "某 库房 有 一批 钢材 ， 原 计划 每天 用 12 吨 ， 由于 提高 技术 ， 实际 每天 比 原 计划 多用 3 吨 ， 这样 比 原 计划 少 用 8 天 ， 这 批 钢材 有 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1626", "content": "小 东 有 248 张 画片 ， 送给 小 方 39 张 ， 送给 小 明 73 张 ． 小 东 还 剩 多少 张 画片 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1932", "content": "如果 规定 职工 每月 工资 超过 800 元 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 小 军 爸爸 这个 月工资 是 1200 元 ， 那么 他 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9161", "content": "一 个 长方形 长 3 分 米 ， 宽 2 分 米 ， 以 它 的 任意 一边 为 轴 旋转 ， 能 得到 不同 的 圆柱体 ， 其中 较大 的 一个 圆柱 的 体积 = 多少 立方分米 ．", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "7280", "content": "一 辆 小汽车 (4/5) 小时 行 了 32 千米 ． 这辆 小汽车 行 48 千米 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14345", "content": "一 个 长方形 长 4 厘米 ， 宽 2 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17957", "content": "a 、 b 两地 相距 457.5 千米 ， 甲 、 乙 两车 分别 从 两地 同时 出发 相向 而 行 ， 甲 车 每 小时 行 60 千米 ， 刚 出发 不久 甲 车 因 发生 故障 停 了 1 小时 ； 乙 车 每 小时 行 55 千米 ． 相遇 时 甲 车行 了 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2947", "content": "把 一块 4 公顷 的 地 平均 分成 3 份 ， 其中 2 份 种 玉米 ， 种 玉米 的 地 占 这块 地 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14104", "content": "3 辆 汽车 9 天运 粮食 162 吨 ， 平均 每辆 汽车 每天 运 粮食 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22409", "content": "光华 学校 电影院 有 18 排座位 ， 每排 有 25 个 座位 ， 一共 有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5889", "content": "我们 学校 刚 建 的 教学大楼 每层 有 5 个 教室 ， 每个 教室 放 46 张 单人 课桌 ， 你 知道 一共 放 了 多少 张 单人 课桌 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16572", "content": "一 包 茶叶 用 去 (3/5) ， 还 剩下 600 克 ， 这 包 茶叶 有 多重 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20166", "content": "学校 准备 发 练习本 ， 发给 12 个 班 ， 每班 206 本 ， 还 需要 留 384 本 作为 备用 ， 学校 应 买 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11184", "content": "鹅 的 孵化期 是 30 天 ， 鸭 的 孵化期 是 鹅 的 (14/15) ， 鸡 的 孵化期 是 鸭 的 (3/4) ． 鸡 的 孵化期 = 多少 天 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12949", "content": "一 个 服装厂 计划 做 850 套 服装 ， 已经 做 了 3 天 ， 平均 每天 做 65 套 ， 剩下 的 要 在 5 天 内 完成 ， 平均 每天 要 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14644", "content": "做 6 只 底面 半径 是 2 分 米 ， 高 是 5 分 米 无盖 的 圆柱形 水桶 ， 需要 多少 平方分米 的 铁皮 ？", "knowledge": ["*", "+", "^"], "difficulty": 0.6, "length": 15}
-{"question_id": "13123", "content": "冰 融化 成 水 以后 ， 体积 变为 原来 的 (10/11) ． 一盒 冰块 有 22 立方分米 ， 融化 成 水 以后 的 体积 = 多少 立方分米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19249", "content": "一 个 比 的 前项 是 (1/2) 比值 是 (2/5) ， 这个 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15505", "content": "幸福 水泥厂 每天 生产 1000 吨 水泥 ， 每 (1/20) 吨 装 一袋 ． 每天 生产 的 水泥 可以 装 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12604", "content": "修路 队 修 了 一条 长 3600 米 的 公路 ， 计划 用 36 天 完成 ， 实际 每天 比 计划 多 修 20 米 ， 实际 用 了 多少 天 修 完 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11229", "content": "一 个数 加上 它 的 50% 等于 150 的 (1/2) ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17879", "content": "水果 店里 有 苹果 200 千克 ， 运 来 的 雪梨 比 苹果 多 (4/5) ， 运 来 雪梨 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9547", "content": "豆豆 今年 4 岁 ， 是 妈妈 年龄 的 (2/13) ． 妈妈 今年 多少岁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15460", "content": "小 红 、 小 东 一起 拍球 ， 小 红 拍 了 120 个 ， 小 东 拍 的 比 小 红 少 10% ， 两 人 一共 拍 了 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17792", "content": "一 列 火车 全长 215 米 ， 每秒 行驶 25 米 ， 要 经过 长 960 米 的 大桥 ， 全 车 通过 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "948", "content": "如果 一种 甜菜 的 含糖 率 是 12% ， 那么 用 多少 千克 甜菜 可以 榨出 156 千克 的 糖 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2027", "content": "大厅 里 有 4 根 圆柱 ， 每 根 底面 直径 为 1 米 ， 高 为 8 米 ． 在 这些 圆柱 的 表面 涂 油漆 ， 平均 每平方米 用 油漆 0.8 千克 ， 共 需 油漆 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "15302", "content": "两辆 汽车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 甲 车 每 时 行 50 千米 ， 乙 车 每 时 行 60 千米 ， 经过 4 时 两车 还 相距 全程 的 20% ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1554", "content": "走 一段路 ， 上午 走 了 全长 的 20% 还 多 10 千米 ， 下午 走 了 全长 的 (2/7) ， 还 剩 53 千米 ， 求 上午 走 了 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12439", "content": "“ 6 一 ” 期间 ， 义乌 解百 商场 举行 0.85 的 促销 活动 ， 王 丽 买 了 一件 上衣 花 了 102 元 ， 这件 上衣 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11303", "content": "食堂 运 来 一堆 煤 ， 用 去 了 12 吨 ， 还 剩 36 吨 ． 已 用 去 这 堆 煤 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9454", "content": "两辆 汽车 同时 从东向西 行驶 ， 甲 车 每 小时 行 46 千米 ， 乙 车 每 小时 行 49 千米 ， 行 了 2.5 小时 后 ， 乙 车 正好 到达 目的地 ， 这时 甲 车 离 目的地 还有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14428", "content": "一 个数 的 35% - 2.8 等于 3.5 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2013", "content": "一 列 火车 每 小时 行驶 65 千米 ， 小强 骑 自行车 的 速度 比 火车 速度 的 (2/13) 多 2 千米 ． 小强 骑 自行车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10382", "content": "一 批 煤 ， 烧 去 60 吨 ， 正好 烧 去 这 批 煤 的 (2/7) ， 这 批 煤 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15423", "content": "学校 举行 运动会 ， 女 运动员 有 136 名 ， 男 运动员 比 女 运动员 的 1.5 倍 少 52 名 ， 参加 运动会 的 男 运动员 有 多少 名 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7337", "content": "参观 科技馆 的 成人 人数 是 儿童 人数 的 2 倍 ， 如果 有 大人 458 人 ， 一共 有 多少 人 参观 科技馆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2017", "content": "甲乙 两 村 的 路程 长 880 米 ， 王大爷 从 甲 村 出发 ， 以 55 米 / 分 的 速度 步行 去 乙 村 ， 需要 多少 分钟 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1243", "content": "1800 / 9 的 商 再 除以 20 的 结果 = ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21724", "content": "学校 大队 部 买来 一批 文具盒 作 奖品 ， 平均 发给 19 个 班 ， 每班 6 个 ， 还 剩下 16 个 ， 学校 大队 部 一共 买来 多少 个 文具盒 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19311", "content": "元旦 将 至 ， 邮局 推出 一种 明信片 ， 每套 售价 9 元 ． 周 6 一天 卖 了 56 套 ， 一共 卖 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9438", "content": "黄 阿姨 的 汽车 每 行驶 100 千米 耗油 7 千克 ， 汽车 油箱 最 多 可 装 84 千克 油 ， 那么 ， 加满 油 后 一次 最 多 可以 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7878", "content": "刘 叔叔 带 600 元 钱 买 化肥 ， 每 袋 化肥 72 元 ， 买 完 化肥 刘 叔叔 还 剩 96 元 钱 ， 刘 叔叔 买 了 多少 袋 化肥 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9134", "content": "刘师傅 加工 一批 零件 ， 如果 每天 加工 12 个 ， 要 50 天 完成 ， 如果 每天 多 加工 3 个 ， 需要 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18551", "content": "京华 超市 有 草鱼 180 千克 ， 卖出 它 的 (1/5) 后 ， 剩下 的 草鱼 重量 相当于 虾 的 90% ， 超市 中 有 虾 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13963", "content": "挖 一个 长方体 蓄水池 ， 水池 长 18 米 ， 比 宽 多 10 米 ， 深度 比 宽 少 2 米 ． 现有 24 个 工人 参加 挖 池 工作 ， 如果 平均 每人每天 挖 3 立方米 ， 多少 天 才能 挖 完 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12995", "content": "小 丽 的 妈妈 把 5000 元 拿 去 投资 ， 定期 2 年 ， 年 回报率 是 3.06% ， 到期 时 小 丽 的 妈妈 可以 取回 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18070", "content": "工程队 挖 一条 800 米 的 水渠 ， 第一天 挖 了 全长 的 (3/8) ， 第 二 天 挖 了 全长 的 40% ， 还 剩下 多少 米 没有 挖 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6253", "content": "三年级 一班 39 人 ， 二 班 41 人 ， 每 8 人 分成 一组 ， 一共 分成 了 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18055", "content": "向 “ 希望工程 ” 献爱心 ， 丁丁 捐 了 15.60 元 ， 笑笑 比 丁丁 多 捐 了 4.30 元 ． 他们 俩 一共 捐 了 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15084", "content": "小 文 驾车 去 旅游 ， 第一天 行 了 6 小时 ， 第 二 天 行 了 7 小时 ， 这辆 汽车 平均 每 小时 行 65 千米 ， 两天 一共 驾车 行驶 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4036", "content": "甲乙 两种 儿童 服饰 原价 相同 ， 甲种 儿童 服饰 按 0.5 销售 ， 乙种 儿童 服饰 按 0.6 销售 ， 王 阿姨 共 花 121 元 购买 这 两种 儿童 服饰 各 一件 ， 这 两种 儿童 服饰 每件 原价 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7172", "content": "六年级 参加 数学 兴趣小组 的 有 12 人 ， 占 全班 人数 的 (1/4) ． 六年级 共有 多少 名 学生 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22921", "content": "某 化肥厂 生产 化肥 1000 吨 ， 运出 28 次 ， 还 余下 104 吨 ． 平均 每次 运出 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18077", "content": "菜籽 的 出油率 是 42% ， 要 榨油 1050 千克 ， 需要 油菜籽 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6442", "content": "胜利 农场 种 小麦 25.5 公顷 ， 比 玉米 种植 面积 少 (1/3) ， 农场 种植 玉米 多少 公顷 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4097", "content": "徒弟 每 小时 加工 零件 38 个 ， 师傅 每 小时 加工 零件 是 徒弟 的 2 倍 ， 师傅 徒弟 每 小时 一共 加工 零件 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4729", "content": "a 、 b 两地 相距 375 千米 ． 甲 车 每 小时 行驶 67 千米 ， 乙 车 每 小时 行驶 58 千米 ． 两车 同时 从 两地 相对 开出 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13438", "content": "一 架飞机 每 小时 飞行 720 千米 ， (5/6) 小时 飞行 了 全程 的 (2/3) ． 全程 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1690", "content": "某 品牌 的 彩色 电视机 原价 3500 元 ， 搞 促销 活动 连续 两次 降价 ， 每次 降价 20% ， 现价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "12125", "content": "王 小 鹏 帮 妈妈 收 西瓜 ， 每 车运 26 个 ， 一共 运 了 14 车 ． 如果 改用 大车 用 7 辆车 运 ， 每辆 需 运 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22591", "content": "客 、 货 两 船 同时 从 甲乙 两 港 对 开 ， 客船 的 速度 是 24 千米 / 时 ， 货船 的 速度 是 19 千米 / 时 ， 18 小时 后 两 船 还 相距 50 千米 才能 相遇 ． 甲乙 两 港 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17764", "content": "李 楠 3 天 看 完 一 本书 ， 第一天 看 了 全书 的 (3/10) ， 第 二 天 看 了 24 页 ， 还 剩下 全书 的 (2/5) 未 看 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4405", "content": "修 一条 公路 ， 已 修好 840 米 ， 是 没有 修好 的 路段 长度 的 12 倍 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4950", "content": "某 商场 一月份 下半月 的 营业额 480 万元 ， 比 上 半月 增加 了 (1/4) ， 一月份 营业额 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6357", "content": "胜利 路 小学 开展 为 印度洋 海啸 灾区 捐款 活动 ． 其中 五年级 捐款 576 元 ， 比 六年级 少 捐 (1/7) ． 六年级 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19971", "content": "一 辆 洒水车 每 分 行驶 70 米 ， 洒水 的 宽度 是 9 米 ， 洒水车 行驶 5 分钟 ， 能 给 多 大 的 地面 洒水 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19183", "content": "某 山区 的 村落 有 人口 2476 人 ， 全 村落 的 人 都 会 说 普通话 或 广东话 ． 调查 所得 ， 会 说 普通话 的 有 1765 人 ， 会 说 广东话 的 有 987 人 ． 问 会 说 普通话 和 广东话 两种 语言 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17899", "content": "京广铁路 长 2324 km ， 成渝 铁路 的 长度 比 京广铁路 的 (1/4) 少 77 km ， 成渝 铁路 全长 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "699", "content": "平原 机械厂 计划 每天 生产 56 个 机器 零件 ， 28 天 完成 ． 实际 每天 比 计划 多 生产 8 个 ， 实际 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4635", "content": "王 叔叔 开车 去 台城 ， 去 时 速度 为 60 千米 / 时 ， 用 4 小时 ． 返回 时 少 用 1 小时 ， 返回 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16976", "content": "超市 运 来 150 箱 苹果 ， 210 箱 桔子 ， 这 两种 水果 的 总数 相当于 梨 的 (9/4) 倍 ， 运 来 梨 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10695", "content": "父亲 的 年龄 是 儿子 的 年龄 的 7 倍 多 1 ， 若 父亲 的 年龄 是 36 岁 ， 则 儿子 的 年龄 为 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11315", "content": "12 的 (5/6) 比 (7/4) / (7/32) 的 商 多 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22625", "content": "奶奶 用 7.65 米 丝绳 编 “ 中国 结 ” 编 一个 要 用 0.85 米 ， 这些 丝绳 可以 编 几个 “ 中国 结 ” ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19125", "content": "时代 超市 一种 商品 反季节 促销 ， 打 0.75 销售 ， 现在 卖 150 元 ， 这种 商品 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22977", "content": "口 算 比赛 ， 小 明 做 对 了 (9/10) ， 正好 54 题 ． 小 军 做 对 总数 的 (5/6) ， 小 军 做 对 多少 题 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3537", "content": "一 辆 卡车 和 一辆 轿车 从 甲 城 开往 乙 城 ， 当 轿车 行 全程 的 (1/2) 时 ， 卡车 行 44 公里 ． 照 这样 计算 ， 当 轿车 到达 终点 时 ， 卡车 行 全程 的 (4/5) ， 则 甲乙 两城 相距 多少 公里 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21622", "content": "有 7 盒 皮球 ， 活动课 分给 学生 29 个 后 还 剩 6 个 ， 平均 每盒 有 多少 个 皮球 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3299", "content": "小 明 乘火车 去 旅游 ， 火车 穿过 一条 长 750 米 的 隧道 用 了 (3/4) 分 ． 火车 每 分行 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2951", "content": "学校 捐款 支援灾区 ， 五年级 同学 共 捐 300 元 ， 比 六年级 多 (1/5) ， 六年级 同学 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4186", "content": "计算 ： 765 * 963963 - 765765 * 963 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6521", "content": "一 台 电脑 原价 8000 元 ， 现价 6000 元 ， 降价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19026", "content": "(3/20) 的 (5/9) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12938", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 45 千米 ， (6/5) 小时 到达 ． 如果 把 速度 提高 20% ， 那么 几小时 可以 到达 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18643", "content": "加工 一批 零件 ， 原 计划 15 天 完成 ， 实际 每天 多 加工 30 个 ， 结果 只用 10 天 就 完成 任务 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5426", "content": "一 个数 的 倒数 是 (7/12) ， 这个 数 的 (5/6) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7481", "content": "一 条 36 米 长 的 绳子 剪 去 (1/4) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22900", "content": "一 个数 的 13 倍 是 676 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11851", "content": "2.3 * 3.8 与 4.2 的 和 ， 所得 的 积 再 除以 0.25 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12612", "content": "有 一堆 沙 运走 5.4 吨 ， 余下 的 重量 比 原来 的 (3/4) 少 0.6 吨 ， 这 堆 沙 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "284", "content": "新区 小学 的 教学楼 有 4 层 ， 每层 有 3 个 教室 ， 平均 每个 教室 的 自然 角 有 6 条 金鱼 ． 这些 教室 的 自然 角 一共 有 多少 条 金鱼 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16272", "content": "四年级 同学 去 福利院 做好事 ， 女生 有 49 人 ， 男生 有 56 人 ， 每 5 个 同学 分成 一组 ， 一共 可以 分成 多少 个 小组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12637", "content": "一 件 衣服 售价 240 元 ， 比 原来 降低 了 (1/6) ． 比 原来 降低 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23097", "content": "从 938 里 连续 减去 多少 个 7 ， 正好 减 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14767", "content": "学校 合唱队 有 男生 20 人 ， 女生 比 男生 多 (1/5) ， 女生 有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13293", "content": "一 堆 货物 第一天 运走 它 的 (1/4) ， 第 二 天 运走 余下 的 (1/3) ， 如果 这 雄 货物 共 400 吨 ， 还 剩 多少 吨 没有 运走 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "21237", "content": "一 台 彩电 先 降价 20% ， 现在 要 涨价 百分之几 才能 以 原价 出售 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5299", "content": "李 阳 家 上个月 用 了 60 度 电 ， 电费 是 30 元 ． 热 依 拉 家 上个月 用 了 45 度 电 ， 电费 = 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "313", "content": "某种 农药 (3/2) kg 加水 稀释 后 可 喷洒 1 公顷 的 菜地 ， 喷洒 (1/5) 公顷 菜地 需要 多少 千克 的 农药 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3511", "content": "甲乙 两站 之间 的 铁路 长 460 千米 ． 一列 客车 以 每 小时 80 千米 的 速度 从 甲 站 开往 乙 站 ， 同时 一列 货车 一 每 小时 35 千米 的 速度 从 乙 站 开往 甲 站 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8486", "content": "修 一条 水渠 ， 甲 工程队 修 了 4800 米 后 ， 乙 工程队 修 了 剩下 的 (1/6) ， 还 剩 2500 米 ． 这 条 水渠 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6452", "content": "一 件 工作 ， 甲 独 做 2 天 可 完成 这件 工作 的 (1/3) ． 照 这样 计算 ， 剩下 的 工作 还 需 多少 天 完成 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9156", "content": "把 12 颗 糖果 平均 分成 4 份 ， 每份 多少 颗 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18604", "content": "有 一组 互相 咬合 的 齿轮 ． 大 齿轮 每分钟 转 80 周 ， 比 小齿轮 每分钟 转 的 周 数 少 (4/5) ． 小齿轮 每分钟 转 多少 周 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21595", "content": "87.2 / 0.34 ， 当 商 是 256 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17425", "content": "粮店 运进 2 车 粮食 ， 一共 32 吨 ． 其中 一车 大米 重 24 吨 ， 另 一车 是 面粉 ． 大米 的 重量 是 面粉 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18794", "content": "李 庄 小学 3 、 四年级 一共 有 231 人 ， 三年级 有 3 个 班 ， 平均 每班 45 人 ， 四年级 有 2 个 班 ， 平均 每班 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14005", "content": "李 明 买 了 2000 元 国家 建设 债券 ， 定期 3 年 ， 如果 年利率 是 2.89% ， 到期 时 他 可 获得 本金 和 利息 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4714", "content": "把 一个 棱 长 6 分 米 的 正方体 钢坯 ， 锻造 成 一个 底 面积 是 9 平方分米 的 长方体 钢 块 ， 能 锻造 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18172", "content": "棉衣 每件 38 元 ， 棉裤 每件 30 元 ． 王 阿姨 一共 要 进 12 套 ， 她 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1117", "content": "6 （ 1 ） 38 人 参加 数学考试 ， 32 人 成绩 良好 ， 那么 没有 达到 良好 成绩 的 学生 人数 占 全班 总 人数 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13324", "content": "有 18 名 学生 参加 学校 讲演 活动 ， 占 全 学校 学生 的 (3/40) ， 全校 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15446", "content": "比 42 的 15 倍 多 28 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3289", "content": "一 个 服装厂 原来 生产 一套 服装 的 成本 是 160 元 ， 由于 扩大 生产 规模 ， 使 每套 服装 的 成本 降低 了 20% ． 现在 每套 服装 的 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2224", "content": "某 商店 以 同样 的 价格 买进 了 a 、 b 两种 商品 ， a 种 商品 畅销 ， 每件 卖 240 元 ， 赚 20% ． b 种 商品 滞销 ， 卖出 后 每件 亏本 15% ． b 种 商品 每件 卖 了 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21853", "content": "粮店 运 来 大米 45 袋 ， 其中 的 25 袋 每 袋 重 50 千克 ， 其余 每 袋 重 10 千克 ， 共运 来 大米 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "11672", "content": "一 个 平行四边形 的 底 25 厘米 ， 高 是 底 的 (4/5) ． 它 的 面积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10510", "content": "张 强 家 原来 每月 用水 约 16 吨 ， 他 换 了 节 水龙头 后 每月 用水 约 14 吨 ， 每月 用水 比 原来 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15953", "content": "小 明 在 2010 年 3 月 1 日 把 3000 元 压岁钱 存入 银行 ， 定期 2 年 ， 年利率 为 2.5% ， 到期 时 ， 他 可以 从 银行 取出 本金 和 利息 共 多少 元 ． （ 已 取消 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15285", "content": "某 数 的 (4/3) 倍 比 1.5 的 25% 少 0.25 ， 某 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1128", "content": "多少 / 7 = 435 … 5 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4531", "content": "小 华 从 家 到 学校 每分钟 走 80 米 ， 5 分钟 到校 ， 今天 她 想 提前 1 分钟 到校 ， 她 速度 应 比 原来 加快 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17965", "content": "2.4 / 24 的 商 乘以 2.9 与 3.3 的 和 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19557", "content": "学校 有 47 个 乒乓球 ， 又 买来 73 个 ． 如果 平均 分给 5 个 班 ， 每个 班 分 得 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16390", "content": "小巧 妈妈 今年 39 岁 ， 如果 小巧 今年 的 年龄 乘 4 ， 再 减去 5 就 和 妈妈 的 年龄 一样 ， 小巧 今年 几岁 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10146", "content": "分针 从 数字 5 走 到 8 ， 一共 走 了 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9366", "content": "商店 运 来 梨 7 吨 ， 比 运 来 的 苹果 的 3 倍 多 (1/4) 吨 ． 运 来 梨 和 苹果 共 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18043", "content": "食堂 运 来 一批 大米 ， 每天 要 用 去 75 千克 ， 一个月 后 还 剩下 500 千克 ． 共运 来 大米 多少 千克 ？ （ 一个月 按 30 天 计算 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12795", "content": "有 12 箱 酸奶 和 15 箱 果汁 ， 每箱 都 装 24 瓶 ， 一共 多少 瓶 饮料 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1676", "content": "汽车 从 a 城 到 b 城 共用 2 天 时间 ， 第一天 行 了 全程 的 (3/5) 多 90 千米 ， 第 二 天 行 了 全程 的 (1/3) ． a 、 b 两城 相距 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22777", "content": "用 铁丝 把 2 根 横截面 直径 为 20 厘米 的 圆木 捆 在 一起 （ 不计 接头 ） ， 捆 一圈 到 少 需要 多少 厘米 长 的 铁丝 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20094", "content": "一 辆 汽车 从 青城 开往 相距 480 千米 的 蓝 城 ， 4 时 后 ， 汽车 行 了 全程 的 (2/3) ． 照 这样 计算 ， 这辆 汽车 从 青城 到 蓝 城 需要 行驶 几时 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19431", "content": "一 件 工作 ， 已经 完成 (4/7) ， 还 剩下 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17397", "content": "新华 钢铁厂 去年 生产 钢材 270 万吨 ， 比 计划 多 生产 30 万吨 ， 实际 比 计划 多 生产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12291", "content": "一 杯 牛奶 ， 喝 了 (6/7) ， 杯中 还有 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11766", "content": "9 * （ 37 - 28 ） 中 ， 要 先 算 多少 法 ， 再 算 多少 ． 结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1603", "content": "某 车间 有 工人 150 名 ， 已知 这些 工人 人数 的 恰好 是 全厂 人数 的 (5/6) ， 全厂 一共 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3340", "content": "一 辆 公交车 坐 了 27 人 、 到 前方 车站 下去 9 人 ， 后来 又 上来 18 人 ， 车上 现在 又 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21258", "content": "甲 铁块 重 (5/6) 吨 ， 相当于 乙 铁块 的 (5/12) ． 丙 铁块 重 是 乙 铁块 的 (1/2) ， 丙 铁块 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21629", "content": "一 个 因数 是 855 ， 另 一个 因数 是 24 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5464", "content": "小 红 种 了 5 行 萝卜 ， 每行 9 个 ， 送给 奶奶 15 个 ， 还 剩 多少 个 萝卜 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16107", "content": "一 辆 汽车 由 甲地 开往 乙地 ， 已 行 的 比 全程 的 (3/10) 多 20 千米 ， 这时 距 乙地 260 千米 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11572", "content": "一 只 青蛙 要 爬 出 10 米 高 的 井口 ． 它 每天 白天 向 上爬 2 米 ， 夜晚 向 下滑 1 米 ， 多少 天 后 青蛙 才能 爬 出 井口 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4792", "content": "35 的 (1/5) 比 一个 数 的 (3/7) 少 5 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10691", "content": "一 辆 送 货车 拉 了 260 盒 文具 ， 平均 送到 8 个 零售点 ， 最后 还 剩下 20 盒 ． 平均 每个 零售点 送 多少 盒 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3460", "content": "从 4 个 105 里 减去 1220 的 25% ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19844", "content": "甲班 有 学生 48 人 ， 其中 (1/2) 是 女生 ； 乙班 有 学生 45 人 ， 其中 (1/3) 是 女生 ， 那么 两班 的 男生 共有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13569", "content": "修路 队 计划 11 天 修 一条 长 1300 米 的 路 ， 前 6 天 修 了 600 米 ， 剩下 的 平均 每天 要 修 多少 米 才能 按时 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18762", "content": "一 个数 加上 5 ， 减去 7 ， 乘以 4 ， 除以 6 得 18 ． 这个 数 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12137", "content": "某 厂 男 职工 与 女职工 的 人数 比 是 7 ： 8 ， 那么 男 职工 人数 相当于 女职工 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9948", "content": "一 根 电线 长 1.2 米 ， 截去 20% 后 ， 再 截去 0.2 米 ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9796", "content": "小 红 在 算 一道 除法 题 时 ， 把 除数 0.25 看成 了 2.5 ， 结果 得数 是 0.16 ， 正确 的 结果 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "311", "content": "小 敏 看 一本 卡通画 ， 每天 看 20 页 ， 6 天 后 还 剩 全书 的 20% ， 这本 卡通画 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "559", "content": "甲 ， 乙 两个 数 最大公约数 是 5 ， 最小 公倍数 是 120 ， 现 甲 数 为 40 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16503", "content": "甲乙 两 仓 共存 粮 150 吨 ， 甲 取 走 (2/3) ， 乙 取 走 (4/5) 后 ， 两 仓 剩下 的 粮食 相等 ． 甲 原有 粮食 多少 吨 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22320", "content": "买 了 5 盒 羽毛球 球 ， 每盒 7 个 ， 一共 花 了 120 元 ， 每个 羽毛球 球 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13854", "content": "某 工程队 修 一条 路 ， 开始 每天 修 36 米 ， 11 天 正好 修 完 这 条 路 的 一半 ， 以后 每天 修 44 米 ， 正好 按 原 计划 完成 ， 工程队 原 计划 多少 天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21105", "content": "某 农具厂 原 计划 每天 生产 12 件 农具 ， 10 天 完成 一批 任务 ． 实际 提前 2 天 完成 任务 ， 实际 每天 生产 农具 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8500", "content": "新华书店 运 来 一批 儿童读物 ， 第一天 卖出 1800 本 ， 第 二 天 卖出 的 本 数 是 第一天 的 (8/9) ， 余下 总数 的 (2/7) 第 3 天 全部 卖完 ， 这 批 书 一共 有 多少 本 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14049", "content": "茂名 村 修 一条 800 米 长 的 水渠 ， 已经 修 了 10 天 ， 每天 修 62 米 ． 总共 用 了 14 天 修 完 ， 剩下 的 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18994", "content": "同学 们 参加 秋季 造林 ， 共 植 松树 45 行 ， 每行 126 棵 ， 植 柏树 324 棵 ， 松树 棵 数 比 柏树 棵 数多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22890", "content": "学校 生物 小组 有 男生 25 人 ， 女生 17 人 ． 科技 小组 的 人数 是 生物 小组 的 6 倍 ， 科技 小组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7601", "content": "甲乙 两 工程队 合 修 一条 水渠 ， 计划 甲乙 修 的 米 数 比 是 3 ： 2 ， 完工 时 甲 修 了 全长 的 (5/12) ， 乙 比 计划 多 修 209 米 ， 求 这 条 水渠 的 全长 = 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6180", "content": "巴西 高原 的 纺锤 树 最 粗 直径 有 5 m ， 课桌 长 1 m ． 一张 课桌 的 长度 是 它 最 粗 直径 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8947", "content": "一 个 平行四边形 的 面积 为 14 平方分米 ， 高 为 4 分 米 ， 底 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16224", "content": "有 一块 4 公顷 的 果园 ， 苹果树 占 果园 面积 的 (3/4) ， 苹果树 占地 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3584", "content": "工程队 12 天 修 完 一条 长 6 千米 的 水渠 ． 平均 每天 修 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15925", "content": "甲 、 乙 两列 火车 同时 从 相距 900 千米 的 两地 相向 而 行 ， 甲 列车 每 小时 行 60 千米 ， 乙 列车 比 甲 列车 每 小时 多行 30 千米 ， 两列 火车 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23019", "content": "一 台 拖拉机 上午 耕地 3 小时 ， 共 耕地 1050 平方米 ． 照 这样 计算 ， 下午 再 耕 4 小时 ， 这 一天 能 耕地 多少 平方米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10633", "content": "王 华 把 5000 元 钱 存入 银行 ， 整存整取 5 年 ， 年利率 为 3.6% ， 如果 利息 税率 为 20% ， 到期 可 得 税后 利息 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "15816", "content": "某 工程队 20 天 能 修 1200 千米 的 公路 ， 实际 前 3 天 就 完成 了 20% ， 照 这样 计算 ， 可 提前 几天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19410", "content": "超市 原有 一些 大米 ， 卖出 28 袋 ， 又 运进 25 袋 ， 现在 还有 51 袋 ， 超市 原有 大米 多少 袋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "144", "content": "48 / 多少 = 5 … 3 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6802", "content": "一 种 收音机 ， 现在 每 台 成本 68 元 ， 比 原来 降低 了 (3/20) ， 原来 每 台 成本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7747", "content": "学校 买来 一些 图书 ， 平均 放在 8 个 书架上 ， 每个 书架 放 240 本 ， 还 剩 80 本 ， 学校 买来 图书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20653", "content": "我市 垃圾 进行 分类 处理 ， 垃圾处理 场 每天 收到 120 车 垃圾 ， 每 车 约 重 5 吨 ， 其中 可回收 利用 的 垃圾 约 占 5% ． 处理场 每天 收到 的 可回收 利用 的 垃圾 = 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7145", "content": "一 辆 汽车 运 一堆 货物 ， 运走 了 总数 的 45% ， 这时 剩下 的 比 运走 的 还 多 60 吨 ． 原来 这 堆 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14963", "content": "一 间 教室 长 8.5 米 ， 宽 4.5 米 ， 用 面积 为 0.25 平方米 的 方 瓷砖 铺 地 ， 一共 需要 多少 块 瓷砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22612", "content": "有 30 千克 花生仁 ， (3/4) 千克 装 一袋 ， 可以 装 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10409", "content": "兰兰 身高 134 厘米 ， 东东 比 兰兰 高 5 厘米 ． 东东 身高 = 多少 厘米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9760", "content": "3 、 四年级 的 同学 去 植树 ， 三年级 有 97 人 ， 四年级 有 89 人 ． 6 名 同学 分为 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21265", "content": "王老师 买 了 640 块 糖 ， 把 它们 平均 分给 8 个 小组 的 同学 ， 每个 小组 的 同学 有 4 人 ， 平均 每人 多少 块 糖 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14368", "content": "72 与 4 的 差 乘以 56 与 26 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21960", "content": "甲乙 两车 同时 从 a 、 b 两地 相向 而 行 ， 甲 车 每 小时 行 55 千米 ， 乙 车 每 小时 行 65 千米 ， 3 小时 后 两车 还 差 15 千米 才能 相遇 ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8015", "content": "一 辆 汽车 从 相距 366 千米 的 甲地 开 到 乙地 ， 共用 了 3 时 ， 这辆 汽车 行驶 的 平均速度 应该 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6674", "content": "学校 艺术节 ， 准备 了 花环 和 彩球 各 20 个 ， 已知 彩球 每个 3.5 元 ， 共 花 去 100 元 ， 每个 花环 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2939", "content": "一 桶 油 ， 第一次 倒 出 它 的 (1/3) ， 第 二 次 倒 出 它 的 (1/2) ， 桶 里 还 剩 2 千克 ． 这 桶 油 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10881", "content": "甲 、 乙 二 位 同学 合 打 一份 资料 ， 甲 每 分 打 18 个 字 ， 乙 每 分 打 22 个 字 ， 两 人 用 了 30 分 打 完 这份 资料 ， 这份 资料 一共 有 多少 个 字 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22930", "content": "商店 购进 5 箱 苹果 和 8 箱 梨 ， 每箱 苹果 重 8.8 千克 ， 每箱 梨 的 重量 是 每箱 苹果 的 2.5 倍 ， 商店 购进 多少 千克 梨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1942", "content": "修路 队 要 修 一条 长 3600 米 的 公路 ， 计划 每天 修 80 米 ， 实际 40 天 就 完成 了 任务 ， 实际 比 计划 提前 几天 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10839", "content": "红星 水泥厂 今年 3 月份 计划 生产 水泥 2500 吨 ， 实际 生产 2750 吨 ， 实际 比 计划 多 生产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14307", "content": "建 一所 小学 ， 实际 投资 192 万元 ， 比 计划 投资 多 (1/3) ． 原 计划 投资 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1589", "content": "学校 买 了 2700 千克 大米 ， 其中 的 (2/5) 运到 食堂 ， 上周 已经 吃 了 运 来 的 (1/3) ． 已经 吃 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13916", "content": "李 村 修 一条 水渠 ， 已经 修 了 12 千米 ， 还 剩 (1/4) 没有 修 ， 这 条 水渠 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8523", "content": "实验 小学 五年级 人数 是 四年级 学生 人数 的 1.2 倍 ， 如果 四年级 学生 再 转 来 20 人 ， 则 两个 年级 学生 就 一样 多 ， 原来 四年级 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1753", "content": "妈妈 为 小 红 买 了 一套 衣服 ， 裤子 买 了 36 元 ， 上衣 比 裤子 贵 12 元 ， 妈妈 应付 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15831", "content": "甲 数 的 25% 等于 乙 数 的 (2/3) ， 乙 数 72 ， 甲 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12091", "content": "甲 数 是 0.1 ， 乙 数 是 0.001 ， 甲乙 两 数 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18314", "content": "小 红 家 到 学校 共有 5 条 路 可 走 ， 从 学校 到 少年宫 共有 3 条 路 可 走 ． 小 红 从 家 出发 ， 经过 学校 然后 到 少年宫 ， 共有 多少 种 不同 的 走法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7748", "content": "修 一条 长 150 米 的 公路 ， 已经 修好 了 (2/3) ， 剩下 的 4 天 修 完 ， 平均 每天 应 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12739", "content": "一 堆 钢管 ， 每 相邻 两层 都 相差 1 根 ， 最上层 2 根 ， 最 下层 8 根 ， 这 堆 钢管 共 多少 根 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14205", "content": "李 大爷 的 苹果园 今年 大丰收 ． 如果 每箱 装 32 千克 ， 可以 装 50 筐 ． 李 大爷 只有 40 个 筐 ， 每 筐 要 比 原来 多 装 多少 千克 苹果 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7139", "content": "李 平 期末考试 语文 、 数学 2 门 功课 的 平均 成绩 是 96 分 ， 综合 学科 成绩 公布 后 ， 平均 成绩 下降 了 3 分 ． 综合 科 成绩 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18711", "content": "在 一个 停车场 上 ， 现有 车辆 41 辆 ， 其中 汽车 有 4 个 轮子 ， 摩托车 有 3 个 轮子 ， 这些 车 共有 127 个 轮子 ， 那么 3 轮 摩托车 有 多少 辆 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11817", "content": "学校 图书馆 新 买 美术 书 456 本 ， 买 科技 书 的 本 数 比 美术 书 的 4 倍 还 多 20 本 ， 买来 科技 书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5552", "content": "光明 影城 原来 每天 放映 5 场 电影 ， 每天 可 卖出 4600 张 票 ． 现在 每天 多 放映 2 场 ， 现在 每天 能 卖 多少 张 票 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2460", "content": "一 堆 煤 ， 用 去 它 的 40% ， 剩下 2.4 吨 ， 如果 用 去 它 的 62.5% ， 剩下 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9183", "content": "一 个数 的 (2/5) 等于 26 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2706", "content": "甲乙 两站 的 铁路 长 250 千米 ， 一列 货车 和 一列 客车 同时 从 这 两站 相对 开出 ， 客车 每 小时 行 52 千米 ， 货车 每 小时 行 48 千米 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21245", "content": "我国 幅员辽阔 ， 东西 相距 5200 km ， 东西 相距 是 南北 的 (52/55) ． 南北 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11297", "content": "一 本 320 页 的 故事书 ， 小 丽 上周 读 了 98 页 ， 这 周 读 了 102 页 ， 再 读 多少 页 才能 读完 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6366", "content": "(1/3) + 0.125 + (1/30) + (1/144) + (1/720) = ？ ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "2925", "content": "李老师 带 700 块钱 去 买 词典 ． 买 了 15 本 同样 的 词典 ， 还 剩下 25 元 钱 ， 每 本词典 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12777", "content": "一 件 衣服 打 0.85 后 便宜 了 60 元 ， 这件 衣服 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9560", "content": "公园 里 牡丹花 占 花卉 总数 的 (1/4) ， 月季花 比 牡丹花 多 占 总数 的 (1/6) ， 牡丹花 和 月季花 共 占 花卉 总数 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11686", "content": "姚明 加盟 nba 联赛 的 第一年 ， 投篮 命中率 为 45% ， 按 一年 联赛 30 场 ， 每场 出手 16 次 计算 ， 一个 赛季 姚明 共 投中 多少 个 球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22260", "content": "小 红 的 体重 是 36 千克 ， 小 红 的 体重 比 妈妈 轻 (2/5) ， 妈妈 的 体重 = 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20750", "content": "妈妈 买来 6 袋 苹果 ， 第 袋 8 个 ． 吃 去 12 个 ， 还 剩 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20418", "content": "一 桶 油 25 千克 ， 已经 吃 了 20% ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18161", "content": "0.78 的 36 倍 再 加上 42.7 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16597", "content": "一 种 农药 ， 用药 和 水 按 1 ： 100 配制 而 成 ， 要 配制 505 千克 农药 ， 需要 药 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16521", "content": "一 种 商品 原价 300 元 ， 按 0.9 出售 ， 每件 优惠 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9813", "content": "6 一班 原来 有 42 个 学生 ， 其中 男生 占 (4/7) ， 后来 又 转 来 了 若干名 女生 ， 这 是 男生 、 女生 人数 的 比 是 6 ： 5 ， 转 来 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2128", "content": "盒子 里 共 放 8 个 球 ， 如果 摸 到 红球 的 可能性 是 (1/4) ， 盒子 里 应 放 多少 个 红球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4153", "content": "10 公顷 小麦 田 ， 平均 每 公顷 收 小麦 4.8 吨 ， 按 85% 的 出粉率 计算 ， 这些 小麦 可 磨 面粉 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9380", "content": "王老师 带 了 8000 元 钱 ， 买 一台 电脑 用 去 了 6387 元 ， 买 一台 打印机 用 去 986 元 ， 还 剩 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22942", "content": "张 叔叔 这个 月 的 工资总额 为 1900 元 ． 按照 个人所得税法 的 规定 ， 超过 1600 元 的 部分 要 交纳 5% 的 个人所得税 ． 张 叔叔 这个 月 应 交纳 个人所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8390", "content": "李娜 攒 了 18 元 钱 ， 给 灾区 小朋友 捐 了 (5/6) ， 捐 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10044", "content": "县城 到 省城 的 公路 长 480 千米 ． 一辆 汽车 走 高速路 的 速度 是 80 千米 / 时 ， 走 普通 公路 的 速度 是 40 千米 / 时 ． 走 高速公路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21015", "content": "一 台 vcd 的 原价 是 240 元 ， 现在 打 0.8 销售 ， 现在 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20745", "content": "据 我市 车管所 统计 ： 今年 淮安市 私家车 保有量 已 达 12 万辆 ， 去年 是 今年 的 (5/6) ， 比 前年 多 (1/4) ， 前年 我市 私家车 保有量 = 多少 万辆 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16291", "content": "小 明 读 一本 故事书 ， 第一天 读 了 (1/6) 还 多 6 页 ， 第 二 天 读 的 比 全书 的 (1/8) 少 8 页 ， 还 剩 172 页 ， 这 本书 共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "23081", "content": "小 明 读 一本 420 页 的 童话 书 ， 8 天 读 了 120 页 ， 照 这样 计算 ， 读完 这 本书 要 用 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9726", "content": "天 利 体育用品 有限公司 5 月份 计划 制作 1200 个 足球 ， 实际 比 计划 多 做 了 120 个 ， 实际 完成 了 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10607", "content": "计算 ： 123 + 456 + 789 + 987 + 654 + 321 = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "16180", "content": "为了 抗击 非典 ， 学校 买 了 5 箱 消毒液 ， 每箱 24 瓶 ， 一 共用 去 480 元 ， 每瓶 消毒液 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18364", "content": "三年级 有 288 人 平均 分成 6 个 队 去 参观 蝴蝶 展览 ， 每个 队 又 平均 分成 4 个 组 ， 每组 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22611", "content": "饲养场 有 28 头 猪 ， 每 头 猪 每天 要 喂 15 千克 饲料 ． 那 一个月 （ 30 天 ） 要 用 多少 千克 饲料 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15414", "content": "电影院 楼上 有 9 排座位 ， 每排 40 个 ， 楼下 的 座位 是 楼上 的 2 倍 ， 楼下 有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22449", "content": "商店 运 来 4 盒 铅笔 ， 卖出 20 支 ， 还 剩 28 支 ， 每盒 有 多少 支 铅笔 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17381", "content": "学校 买来 5 个 篮球 和 20 根 跳绳 共用 去 490 元 ． 已知 每个 篮球 85 元 ， 每个 跳绳 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12581", "content": "甲乙 两地 相距 720 米 ， 客货 两车 分别 从 甲乙 两地 同时 出发 ， 相向 而 行 ， 5 小时 相遇 ， 已知 客车 每 小时 行 90 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4247", "content": "甲乙 两袋 面粉 都 是 35 千克 ， 如果 从 甲 袋 取出 5 千克 放入 乙 袋 ， 这时 乙 比 甲 多 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10854", "content": "如果 李先生 以 定价 的 (4/5) 出售 一台 相机 ， 他 将 赚取 50 元 的 利润 ． 如果 他 以 其 定价 的 (5/6) 出售 ， 则 赚取 55 元 的 利润 ． 求 照相机 的 原 定价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8944", "content": "甲乙 两队 修 一条 长 48 千米 的 公路 ． 甲队 修 了 全长 的 (1/3) ， 乙 队 修 的 是 甲队 的 (5/8) ， 乙 队 修 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12568", "content": "学校 新建 了 一幢 教学楼 ， 共 4 层 ， 每层 有 5 间 教室 ， 每间 教室 里 安装 了 12 盏 日光灯 ． 这幢 教学楼 一共 安装 了 多少 盏 日光灯 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21954", "content": "近 江 花园 一期 工程 已 建 住房 24 幢 ， 每 幢 6 层 ， 每层 8 套 ， 共 可 住 多少 户 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18796", "content": "列式 计算 ： 甲 数 的 (3/5) 相当于 乙 数 的 (2/5) ， 乙 数 是 50 ， 甲 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14397", "content": "瓶子 里 有 同样 大小 的 红球 和 黄 球 各 5 个 ． 要 想 摸 出 的 球 一定 有 2 个 同 色 的 ， 最少 要 摸 出 多少 个 球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20459", "content": "一 桶 汽油 用 了 (2/5) ， 用 了 10 千克 ， 这 桶 汽油 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18397", "content": "36 米 比 多少 米 短 60%", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4965", "content": "列式 计算 ． 一个 数 的 3.2 倍 与 这个 数 的 5 倍 之 和 是 61.5 ， 求 这个 数 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10315", "content": "42.5 + 36 / 4.8 的 商 ， 再 乘 10.04 ， 结果 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18062", "content": "10 - 5.6 与 1.4 的 和 ， 所得 的 差 去除 246 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17329", "content": "小 明 体重 39 千克 ， 小 丽 体重 35 千克 ， 小 丽 的 体重 是 小 明 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12204", "content": "(2/27) / (8/9) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3129", "content": "车间 要 生产 100 个 零件 ， 已经 完成 了 40 个 ， 完成 的 占 总数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17677", "content": "张老师 把 5000 元 存入 银行 ， 存期 一年 ， 年利率 是 2.25% ， 到期 时 可 得 利息 多少 元 ． （ 免 征收 利息税 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8681", "content": "一 瓶 酱油 (5/2) 升 ， 用 去 (3/10) ， 用 去 了 多少 升 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4819", "content": "小 明 每 小时 走 (17/3) 公里 ， 小 英 每 小时 走 (17/4) 公里 ， 两 人 从 同一 地点 反向 出发 ， (12/7) 小时 后 ， 两 人 相距 多少 公里 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10066", "content": "学校 图书室 原有 故事书 975 本 ， 现在 又 买来 了 280 本 ， 并 借出 了 348 本 ． 现在 图书室 有 故事书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5875", "content": "1 台 洗衣机 的 原价 1200 元 ， 如果 按 0.85 出售 ， 现在 的 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1413", "content": "时钟 两 时 敲 两下 需要 4 秒 ， 当时 钟 6 时 敲 6 下 需要 多少 秒 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16231", "content": "有 两堆 煤 ， 一堆 560 吨 ， 另 一堆 286 吨 ， 一辆 汽车 每次 能 运 9 吨 ． 这辆 汽车 一共 运 多少 次 才能 把 这些 煤 全部 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16764", "content": "一 只 啄木鸟 每天 吃 24 只 害虫 ， 一只 麻雀 3 天 吃 2 只 害虫 ， 啄木鸟 每天 吃 的 害虫 是 麻雀 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22528", "content": "18 个 0.1 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8779", "content": "用 60 厘米 长 的 铁丝 围成 一个 长方形 ， 围成 的 长方形 长 和 宽 的 比 是 3 ： 2 ， 求 这 长方形 的 宽 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9092", "content": "朝阳 小学 扩建 教学楼 ， 实际 投资 120 万元 ， 比 原 计划 投资 多用 (1/5) ． 原 计划 投资 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21535", "content": "一 个 因数 是 104 ， 另 一个 因数 是 8 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8821", "content": "甲 、 乙 两地 相距 1050 千米 ， 一列 火车 从 甲地 开往 乙地 ， 已经 行 了 354 千米 ． 剩下 的 又 用 了 8 小时 行 完 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11952", "content": "某 厂 生产 一种 产品 ， 每 件产品 的 成本 由 40 元 降低 到 36.4 元 ， 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11113", "content": "一 辆车 从 南京 开往 上海 ， 全程 是 450 千米 ， 已经 行 了 全程 的 (2/3) ， 这时 这辆 车 距 南京 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "71", "content": "平行四边形 的 底边 长 8 分 米 ， 高 4.5 分 米 ， 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15692", "content": "从 4 里 连续 减 多少 个 0.06 结果 为 1 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4794", "content": "□ □ / 7 = 8 … 2 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14060", "content": "百货商店 以 每个 24 元 的 批发价 购进 35 个 喜 羊 羊 玩具 ． 每个 售价 30 元 ， 卖完 后 能 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10580", "content": "一 项 工程 甲队 3 天 完成 它 的 (1/4) ， 甲队 的 工作效率 是 乙 队 的 (2/3) ， 乙 队 独 做 这项 工程 需 几天 完成 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14934", "content": "一 堆 货物 ， 甲 车 运走 24 吨 ， 是 乙 车 的 (4/5) ， 乙 车运 的 是 丙 车 的 (2/3) ． 丙 车运 了 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19751", "content": "少年宫 舞蹈队 有 25 人 ， 合唱队 的 人数 是 舞蹈队 的 3 倍 ， 少年宫 舞蹈队 和 合唱队 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16646", "content": "一 位 打字员 以 每分钟 打 120 个 字 的 速度 打印 一份 稿件 需 20 分钟 完成 ． 如果 想 提前 5 分钟 ， 每分钟 需 打 多少 个 字 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4907", "content": "装配 一批 自行车 ， 原 计划 每天 装 20 辆 ， 需要 30 天 完成 ． 实际 24 天 完成 ， 实际 每天 装配 多少 辆 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23012", "content": "小林 步行 的 速度 是 60 米 / 分钟 ， 他 8 分钟 步行 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8975", "content": "爸爸 开车 参加 自驾游 活动 ， 前 (4/5) 小时 行驶 了 60 千米 ， 刚好 行 了 全程 的 (2/3) ， 行驶 完全 程 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10294", "content": "一 台 电脑 打 0.8 后 售价 4880 元 ， 比 原来 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22980", "content": "一 个数 的 6 倍 是 3846 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8803", "content": "一 种 影碟机 降价 (1/5) 后 ， 现在 售价 400 元 ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10013", "content": "运输 公司 今天 要 运送 35 吨 化肥 下乡 ， 上午 运 了 3 次 ， 每次 只能 运 5 吨 ． 照 这样 计算 ， 下午 要 运 多少 次 才能 运 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "57", "content": "5 （ 3 ） 班 的 同学 在 母亲节 都 表达 了 对 妈妈 的 节日 祝福 ． 其中 ， (1/3) 的 同学 送 了 鲜花 ， (1/5) 的 同学 给 了 妈妈 一个 香香的 吻 ， 其余 的 同学 都 送 上 了 自制 的 贺卡 ． 送 自制 贺卡 的 同学 占 全班 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9286", "content": "学校 科技 组 展出 学生 的 科技 作品 ， 低 、 中年级 的 科技 作品 共有 120 件 ， 中 、 高年级 的 科技 作品 共有 168 件 ， 又 知道 低年级 的 作品 是 高年级 作品 的 (3/7) ． 展出 的 高年级 作品 有 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14167", "content": "一 根 长 2.45 米 的 木桩 打入 河底 ， 现在 测 得 木桩 水上 部分 长 0.75 米 ， 水中 长 1.05 米 ， 求 这根 桩 打 在 泥 中 的 长度 = 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9833", "content": "(5/6) 的 6 倍 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14298", "content": "计算 ： 998877 + 988776 + 887766 + 877665 + 776655 + 766554 + 665544 + 655443 = ．", "knowledge": ["+"], "difficulty": 0.6, "length": 15}
-{"question_id": "23079", "content": "同学 们 积极 为 汶川 大 地震 的 灾民 捐款 ， 12 个 班 共 捐款 8760 元 ， 后来 每班 又 多 捐 (1/5) 实际 每班 平均 捐款 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23127", "content": "一 台 液晶电视 ， 降价 600 元 后 ， 卖 4400 元 ． 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13705", "content": "阿 民 家 到 学校 有 28 km ， 全程 需要 1 h ， 除 汽车 之外 ， 还 需 步行 一段路 ， 汽车 的 速度 为 36 km / h ， 步行 的 速度 是 4 km / h ， 则 需要 步行 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15847", "content": "一 个 比 的 前项 是 (4/7) ， 比值 是 2 ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4625", "content": "一 堆 货物 重 10 吨 ， 一辆车 每次 可 运 (13/20) 吨 ， 已经 运 了 8 次 ， 运 了 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6834", "content": "平行四边形 的 底边 长 6 分 米 ， 高 5.5 分 米 ， 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19899", "content": "机床厂 今年 第一季度 创产值 500 万 ， 超过 计划 (1/9) ． 这个 厂 第一季度 超产 多少 万元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21577", "content": "学校 买来 3 张 桌子 和 4 把 椅子 ， 一 共用 去 404 元 ． 每张 桌子 80 元 ， 每 把 椅子 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10399", "content": "食堂 买 回 面粉 和 大米 各 8 袋 ， 每 袋 面粉 25 千克 ， 每 袋 大米 35 千克 ， 大米 和 面粉 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6945", "content": "小 红 读 一本 故事书 ， 已经 读 了 35 页 ， 正好 是 这 本书 的 (5/7) ， 这 本书 一共 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18525", "content": "两列 火车 从 相距 399 千米 的 两地 同时 相对 开出 ， 经过 2.1 小时 两车 相遇 ． 甲 车 每 小时 行 98 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10675", "content": "商店 原有 苹果 600 千克 ， 已经 卖 了 3 天 ， 每天 卖 120 千克 ， 还 剩 苹果 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6536", "content": "学校 买来 一批 图书 ， 其中 文艺 书 占 (4/9) ， 数学 书 占 余下 的 (18/25) ， 已知 数学 书 比 文艺 书 少 20 本 ． 这 批 图书 共有 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21372", "content": "一 个数 的 5 倍 + 60 的 20% ， 和 是 18 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15614", "content": "王大爷 养 了 9 笼 兔子 ， 每 笼 有 4 只 兔子 ， 共 卖 了 864 元 ， 平均 每 只 兔子 卖 了 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4067", "content": "甲 乙丙 3 人 共同 生产 一批 零件 ， 甲 生产 的 零件 是 乙丙 总和 的 (1/2) ， 甲 丙 生产 的 零件 总和 与 乙 生产 零件 个数 的 比 是 7 ： 2 ， 丙 生产 200 个 零件 ， 甲 生产 了 多少 个 零件 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "21091", "content": "文具店 里 钢笔 原来 每枝 的 售价 是 7.50 元 ， 庆 “ 6 一 ” 活动 中 ， 钢笔 的 售价 是 7.00 元 ， 便宜 了 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7780", "content": "用 一个 空盒 装 同样 的 玻璃球 15 个 ， 连 盒 共 125 克 ， 用 两个 同样 的 空盒 装 20 个 玻璃球 连 盒 共 重 170 克 ， 一个 玻璃球 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8761", "content": "学校 买 一批 书 ， 其中 有 故事书 310 本 ， 文艺 书 240 本 ， 这 两种 书 共 占 这 批 书 总数 的 55% ， 这 批 书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8632", "content": "李 军 拿来 20 张 邮票 给 陈 华 后 ， 两 人 邮票 张 数 相等 ． 已知 李 军 收集 邮票 320 张 ， 陈 华 收集 邮票 多少 张 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21390", "content": "东升 农场 这个 星期 收 共 获 黄瓜 960 千克 ． 每 8 根 黄瓜 装 一袋 ， 每 6 袋装 一箱 ． 需要 准备 几个 箱子 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16006", "content": "商店 新 购进 篮球 、 足球 各 10 个 ， 篮球 每个 售价 40 元 ， 足球 每个 售价 50 元 ． 这些 球 一共 可以 卖 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3560", "content": "一 个 小学 去年 植树 1500 棵 ， 成活率 是 98% ． 植 的 树 活 了 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8488", "content": "红星 小学 开展 节约用水 活动 ， 上半年 节约用水 28 吨 ， 是 下半年 的 (4/7) ， 下半年 节约用水 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5344", "content": "东东 要 参加 登山 活动 ， 和 妈妈 同 去 商场 买 登山包 和 水壶 ． 水壶 的 价格 刚好 是 登山包 价格 的 (2/3) ， 水壶 是 27 元 ， 登山包 和 水壶 一共 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5488", "content": "李 华 的 妈妈 在 银行存款 5000 元 ， 定期 2 年 ， 年利率 是 2.5% ， 利息 税率 为 5% ， 到期 后 ， 李 华 的 妈妈 能 取回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "22289", "content": "歌舞 演员 王 华 参加 演出 ， 取得 收入 3000 元 ， 按 个人所得税法 规定 ， 演出 收入 扣除 800 元 后 的 余额 部分 ， 按 20% 的 比例 缴纳 个人所得税 ． 此次 演出 后 ， 王 华 的 税后 收入 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10494", "content": "一 张 桌子 126 元 ， 一把 椅子 44 元 ， 学校 买来 48 套 桌椅 ， 共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7176", "content": "喜盈门 大酒店 要 按 男女 人数 的 比 3 ： 5 招收 一批 服务员 ， 结果 招收 了 48 人 ， 其中 女服务员 有 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16196", "content": "顺便 商店 3 月份 的 营业额 是 3600 元 ， 如果 按 营业额 的 5% 纳税 ， 应 纳税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10946", "content": "张老师 去 文具店 买 东西 ， 带 的 钱 可以 买 每枝 2 元 的 园珠笔 15 只 和 每 只 4 元 的 铅笔盒 8 只 ， 问 张老师 带 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13796", "content": "一 套 童装 按 0.75 出售 的 价钱 是 63 元 ， 这 套 童装 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6739", "content": "甲 、 乙 两 人 存款 金额 的 比 是 7 ： 5 ， 如果 从 甲 的 存款 里 给 乙 650 元 ， 这时 甲 、 乙 两 人 存款 金额 的 比 是 3 ： 4 ， 原来 甲 有 存款 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "20854", "content": "28 万元 的 4% = 多少 万元 的 16% ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22286", "content": "长沙 到 广州 的 铁路 长 726 千米 ， 一列 特快 列车 从 长 少 开往 广州 ， 2 小时 行驶 242 千米 ． 照 这样 的 速度 ， 还 需要 几小时 才能 到 广州 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7593", "content": "爸爸 开车 去 广州 ， 4 小时 走 了 300 千米 ， 这辆 车 平均速度 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18108", "content": "6 （ 1 ） 班 男女生 人数 比 是 11 ： 10 ， 已知 男生 有 22 人 ， 全班 有 多少 人 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7895", "content": "甲 、 乙 两 人 同时 从 相距 36 千米 的 两地 相向 而 行 ， 甲 每 小时 行 4 千米 ， 乙 每 小时 行 5 千米 ． 如果 丙 骑 自行车 与 甲 同时 同 向 出发 ， 每 小时 行 15 千米 ， 遇到 乙 后 ， 立即 回头 向 甲 驶去 ， 遇到 甲 后 再 回头 向 乙 驶去 ． 这样 不断 来回 ， 直到 甲 、 乙 两 人 相遇 为止 ． 问 丙 共 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21246", "content": "爸爸 这个 月 的 工资 增加 了 200 元 ， 是因为 工资 上浮 了 5% ， 那么 爸爸 这个 月 的 工资 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8298", "content": "一 辆 汽车 行 9 千米 ， 用 去 汽油 (3/4) 升 ， 平均 每 千米 用 汽油 多少 升 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9780", "content": "一 筐 苹果 连 筐 重 27 千克 ， 取出 一半 后 ， 连 筐 重 还有 14 千克 ， 筐 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22112", "content": "一 块 长方形 地 长 10 米 ， 宽 6 米 ， 如果 长 和 宽 都 扩大 2 倍 ， 那么 面积 增加 了 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "20107", "content": "学校 需 新添 28 套 课桌椅 ， 共 付款 1820 元 ， 椅子 每 把 17 元 ， 课桌 每张 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8962", "content": "垃圾 清理 场 昨天 运 来 垃圾 180 吨 ， 用 了 4 小时 清理 完毕 ； 今天 运 来 的 垃圾 比 昨天 多 了 9 吨 ， 今天 需要 几小时 才能 清理 完毕 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3927", "content": "一 批 水泥 ， 用 去 12 吨 ， 剩下 (5/9) ， 这 批 水泥 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10556", "content": "商店 有 14 箱 鸭蛋 ， 卖出去 230 千克 后 ， 还 剩 4 箱 又 20 千克 ， 每箱 鸭蛋 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "394", "content": "一 部 儿童 电视剧 共 324 分钟 ． 分 9 集 播放 ， 平均 每集 播放 多长时间 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12436", "content": "一 个 家具厂 要 做 1860 套 家具 ， 已经 做 了 15 天 ， 每天 做 12 套 ， 还 剩 几套 没 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10853", "content": "小 新 过生日 ， 买 了 一个 正方形 蛋糕 ， 周长 是 48 厘米 ， 在 蛋糕 的 边上 每隔 4 厘米 插 一根 蜡烛 ， 共 需 多少 根 蜡烛 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9687", "content": "商店 买 同 一种 电视 ， 上午 收 售 款 14400 元 ， 下午 收款 23040 元 ， 上午 比 下午 少 售出 3 台 ， 平均 每 台 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7546", "content": "书柜 高 1.75 米 ， 小 明 高 1.38 米 ， 他 站 在 凳子 上 比 书柜 高 0.08 米 ． 凳子 高 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17878", "content": "修建 一块 占地 8000 平方米 的 市民 广场 ， 如果 每 50 平方米 要 用 地砖 40 块 ， 修 这个 广场 至少 要 准备 多少 块 地砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6919", "content": "从 2 里 减去 (2/7) 与 (1/2) 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3185", "content": "一 批 货物 ， 计划 每天 运 30 吨 ， 按期 完成 任务 ， 如果 每天 运 的 吨数 增加 到 50 吨 ， 6 天运 完 ， 这样 可以 比 原 计划 提前 多少 天 完成 任务 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6372", "content": "六年级 同学 分 坐 大 、 小 两辆 汽车 去 春游 ， 开始 上 小车 的 比 大车 的 多 6 人 ， 后来 老师 从 小车 调 15 人 到 大 车上 ． 这时 小车 上 的 人数 比 大车 少 (3/8) ． 现在 大车 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22162", "content": "5 （ 2 ） 班 要 用 涂料 粉刷 教室 ， 已知 教室 的 长宽 高 分别 为 9 米 、 6 米 、 3 米 ． 要 粉刷 教室 的 天花板 和 4 面 墙壁 ， 扣除 门窗 面积 40 平方米 ， 每平方米 需要 涂料 0.5 千克 ， 粉刷 这个 教室 需 多少 千克 的 涂料 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.9, "length": 21}
-{"question_id": "4737", "content": "一 种 商品 ， 售价 是 37.4 元 ， 比 原来 定价 便宜 15% ， 原来 定价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11598", "content": "王 叔叔 卖 7 千克 西瓜 得 20 元 ， 如果 他 卖 21 千克 西瓜 得 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3149", "content": "红星 公司 建 一座 办公楼 ， 原 计划 投资 780 万元 ， 实际 投资 是 原 计划 的 (7/8) ， 比 原 计划 节约 了 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8870", "content": "修路 队 修 一条 900 km 的 路 ， 第一周 修 了 30% ， 第一周 修 了 多少 km ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12495", "content": "计算 987654321 * 123456789 - 987654320 * 123456788 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9239", "content": "甲 有 120 元 ， 比 乙 的 3 倍 多 30 元 ， 甲乙 一共 有 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11514", "content": "用 一根 长 30 厘米 的 铁丝 围成 一个 长方形 ， 长 与 宽 的 比 是 3 ： 2 ， 那么 这个 长方形 的 宽 = 多少 厘米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "655", "content": "玩具厂 上午 做 了 46 个 玩具 ， 下午 比 上午 多 做 了 7 个 ， 这 一天 一共 做 了 多少 个 玩具 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9001", "content": "操场 有 19 个 同学 跳绳 ， 36 个 同学 打 沙包 ， 如果 要 使 打 沙包 的 人数 是 跳绳 人数 的 6 倍 ， 应 去掉 几个 跳绳 的 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22892", "content": "50.6 / 3.42 与 6.7 的 和 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "725", "content": "小 明 去 外婆家 做客 ， 从 家 出发 到 甲地 有 2 条 不同 的 路 ， 从 甲地 到 外婆家 有 4 条 不同 的 路 ． 小 明 去 外婆家 有 多少 种 不同 的 走法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20712", "content": "如果 一棵树 的 树 杆 的 横截面 是 一个 圆 ， 它 的 周长 为 62.8 厘米 ， 那么 它 的 直径 为 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "110", "content": "战旗 文化 广场 移栽 一批 树苗 ． 如果 每行 栽 21 株 ， 要 栽 20 行 ， 如果 每行 栽 28 株 ， 要 栽 多少 行 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22903", "content": "妈妈 去 水果店 买 回 苹果 和 香蕉 各 4 千克 ， 用 去 了 56.2 元 ． 已知 苹果 每千克 7.85 元 ， 香蕉 每千克 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9527", "content": "一 批 零件 有 96 个 ， 一台 机床 1.5 小时 可 加工 24 个 零件 ， 照 这样 计算 ， 加工 完 这 批 零件 共 需 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5632", "content": "一 辆 客车 和 一辆 货车 同时 从 甲 站 开往 乙 站 ， 客车 行 完全 程 需要 6.8 小时 ， 货车 的 速度 比 客车 快 (2/15) ． 货车 将 比 客车 提前 几小时 到达 乙 站 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14595", "content": "看 一 本书 ， 上午 比 下午 少 看 (1/5) ， 下午 比 上午 多 看 10 页 ． 下午 看 了 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15379", "content": "商店 运 来 92 辆 摩托车 ， 上午 卖出 46 辆 ， 下午 卖出 30 辆 ， 还 剩 多少 辆 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22723", "content": "一 个 糖厂 ， 上午 生产 白糖 (3/8) 吨 ， 比 下午 少 生产 (1/4) 吨 ， 这个 糖厂 一天 生产 白糖 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2940", "content": "学校 买 4 副 羽毛球拍 和 20 根 跳绳 ， 付出 150 元 ， 找回 11.4 元 ． 每 副 羽毛球拍 18.4 元 ， 每 根 跳绳 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7711", "content": "红光 皮衣 厂 计划 每天 生产 皮衣 180 件 ， 25 天 完成 生产 任务 ， 实际 18 天 就 完成 了 任务 ． 实际 每天 生产 皮衣 多少 件 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13974", "content": "菜场 运 来 3 车 白菜 ， 每 车 490 千克 ． 卖出 865 千克 后 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4925", "content": "一 种 大豆 的 出油率 为 24% - 32% ， 如果 要 榨出 96 千克 油 ， 最少 要 这种 大豆 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1214", "content": "一 辆 客车 和 一辆 轿车 分别 从 甲 城 和 乙 城 同时 相对 开出 ， 2.8 小时 后 两车 相遇 ． 已知 客车 每 小时 行驶 76.5 千米 ， 轿车 每 小时 行驶 93.5 千米 ， 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "980", "content": "一 块 花坛 地 的 (4/7) 种 了 玫瑰 ， 其余 的 种 郁金香 ， 郁金香 占 这块 地 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6236", "content": "学校 组织 学生 栽树 ， 有 15 个 班 参加 ， 每个 班 分成 4 组 ， 每组 有 12 人 ， 参加 栽树 活动 的 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11197", "content": "小 太阳 幼儿园 买 了 156 个 苹果 ， 中 班 小朋友 拿走 (1/3) ， 大 班 小朋友 拿走 余下 的 (3/4) ， 还 剩 多少 个 苹果 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "15257", "content": "少年宫 合唱队 有 女同学 27 人 ， 男同学 25 人 ， 乐队 的 人数 是 合唱队 的 2 倍 ， 乐队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17461", "content": "57 和 36 的 和 比 24 多 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18065", "content": "一 块 长方形 的 菜地 ， 长 15 米 ， 宽 12 米 ． 它 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13051", "content": "某 超市 运 来 300 包 数学 本 ， 运 来 的 英语 本 是 数学 本 的 (4/5) ， 又 是 作文 本 的 (6/7) ， 超市 运 来 作文 本 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "632", "content": "建筑工地 有 水泥 60 吨 ， 第一天 用 去 总数 的 (1/4) ， 第 二 次 用 去 总数 的 15% ， 两次 共用 去 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4192", "content": "修 一条 路 ， 计划 每天 修 50 米 ， 6 天 修 完 ， 实际 每天 多 修 25 米 ， 可以 提前 几天 修 完 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12828", "content": "某 课外活动 小组 有 8 个人 ． 喜欢 唱歌 的 有 6 人 ， 喜欢 跳舞 的 有 4 人 ， 既 喜欢 唱歌 又 喜欢 跳舞 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13698", "content": "一 个 平行四边形 相邻 两条 边 的 长度 分别 为 16 厘米 和 24 厘米 ， 一条 边上 的 高 是 20 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10477", "content": "师徒 加工 一批 零件 ． 徒弟 加工 了 40 个 ， 比 师傅 少 20% ， 师傅 加工 了 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1011", "content": "要 挖 一个 蓄水量 是 126 立方米 的 长方体 的 长方体 游泳池 ， 占地面积 是 63 平方米 ， 池 深 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9895", "content": "1792 / 32 的 商 加上 12 与 23 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5697", "content": "一 块 平行四边形 形 稻田 ， 底 是 90 米 ， 高 60 米 ， 如果 每平方米 施肥 0.2 千克 ， 这块 稻田 需 施肥 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2540", "content": "糖果店 有 一批 白糖 ， 卖出 了 150 公斤 ， 剩下 的 白糖 是 卖出 的 (2/3) ， 糖果店 原有 白糖 多少 公斤 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18810", "content": "美术课 上 老师 让 小 方 把 一张 长方形 纸 平均 分成 8 份 ， 其中 3 份 涂 红色 ， 2 份 涂 蓝色 ， 涂色 部分 共 占 这 张 纸 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20004", "content": "同学 们 帮助 果园 摘 苹果 ， 一共 摘 了 16 筐 ， 如果 每 筐 售价 45 元 ， 这些 苹果 一共 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4198", "content": "胜利 小学 4 、 5 、 六年级 共有 学生 1600 人 ， 六年级 有 学生 740 人 ， 五年级 有 学生 370 人 ， 求 胜利 小学 四年级 有 学生 多少 人 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6420", "content": "学校 舞蹈队 有 男同学 18 人 ， 女同学 22 人 ． 彩旗 队 的 人数 是 舞蹈队 的 3 倍 ， 彩旗 队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11832", "content": "小 明 家门口 到 公路 边 有 一条 长 60 米 ， 小 明 要 在 小路 一旁 每隔 3 米 栽 一棵树 ， 计划 家门口 不 栽 ， 一共 要 栽 多少 棵 树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7630", "content": "王大爷 是 一名 离休干部 ， 他 当年 买 了 1500 元 的 3 年期 国家 债券 ， 当时 的 年利率 是 2.89% ． 到期 后 他 可以 获得 本息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21908", "content": "用 绳子 测井 深 ， 先 垂 下 它 的 (2/3) ， 再 垂 下 剩余 的 (7/10) ， 才 刚好 到底 ， 这时 井 外 还 余 0.5 米 ． 井 深 = 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3720", "content": "停车场 里 有 48 辆 小汽车 ， 是 大 汽车 数量 的 3 倍 ， 大 汽车 的 数量 是 货车 数量 的 40% ， 货车 有 多少 辆 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18052", "content": "把 一批 肥皂 分 发给 某 车间 工人 ， 平均 每人 可 分 到 12 块 ， 若 分给 女工 ， 平均 每人 可 分 到 20 块 ， 若 只 分给 男工 ， 平均 每人 可 分 到 多少 块 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5755", "content": "我们 班 有 男生 23 人 ， 女生 22 人 ， 课外活动 课 上 每 5 人 分成 一组 做 游戏 ， 全班 可以 分成 几组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23040", "content": "一 桶 油 第一次 倒 出 37.5% ， 第 二 次 倒 出 40% ， 两次 共 倒 出 62 千克 ． 这 捅 油 原来 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21425", "content": "一 辆 大客车 和 一辆 小客车 同时 从 北京 出发 开往 上海 ． 大客车 每 小时 行 80 千米 ， 速度 是 小客车 的 (2/3) ． 小客车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16690", "content": "学校 买 了 6 套 办公桌 和 椅子 ． 已知 每 把 椅子 的 价格 是 85 元 ， 每张 桌子 的 价格 是 175 元 ， 学校 买 这些 桌椅 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3019", "content": "学校 书法 组 有 39 人 ， 比 计算机 组 的 2 倍 少 7 人 ， 计算机 组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9984", "content": "8 个人 用 手推车 运 一批 粮食 ， 若 每人 运 135 千克 刚好 一次 运 完 ． 现在 有 2 人 因故 离开 ， 要 一次 运 完 的话 ， 每人 要 运 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12070", "content": "小 红 看 一本 故事书 ， 第一天 看 了 这 本书 的 (1/7) ， 第 二 天 看 了 这 本书 的 (1/5) ， 还 剩 几分 之 几 没 看 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22648", "content": "学校 合唱队 有 30 人 ， 篮球队 的 人数 是 合唱队 的 (9/10) ， 舞蹈队 的 是 篮球队 的 (2/3) ， 舞蹈队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19727", "content": "妈妈 身高 162 厘米 ， 小 亮 的 身高 比 妈妈 矮 25 厘米 ， 爸爸 的 身高 比 小 亮 高 38 厘米 ． 爸爸 身高 多少 厘米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5182", "content": "王 伯伯 家养 了 18 只 鸭 ， 比 鸡 多 12 只 ， 要 使 鸭 的 只 数 比 鸡 多 8 只 ， 王 伯伯 家 还要 买 多少 只 鸡 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14919", "content": "5.6 与 0.7 的 和 ， 乘以 它们 的 差 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6571", "content": "1 千克 苹果 可以 榨 苹果汁 (2/3) 升 ． 我 妈妈 买 了 2 千克 苹果 ， 每 (2/9) 升 就 可 装 一杯 ， 可 榨 几杯 苹果汁 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4573", "content": "每吨 花生 可 榨油 (8/25) 吨 ， (25/39) 吨 花生 可以 榨油 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20061", "content": "有 一批 书 ， 第一天 卖出 400 本 ， 第 二 天 卖出 总数 的 (1/3) ， 第 3 天 卖出 总数 的 25% ， 还 剩 150 本 ， 这 批 书 有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4427", "content": "小 刚 射进 了 18 球 ， 小强 射进 的 球 是 小 刚 2 倍 ， 他们 俩 一共 射进 了 多少 个 球 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21080", "content": "商店 卖出 9 筐 桔子 ， 每 筐 重 85 千克 ， 每千克 卖 3 元 ， 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16271", "content": "乙 数 是 216 ， 甲 数 是 乙 数 的 3 倍 ， 甲 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6840", "content": "小 明 调查 了 本班 学生 的 兄弟 关系 如下 ： 有 哥哥 的 学生 是 全班学生 人数 的 55% ． 有 弟弟 的 学生 是 全班学生 人数 的 50% ． 既有 哥哥 ， 又 有 弟弟 的 学生 数 是 全班 人数 的 25% ． 既 没有 哥哥 ， 又 没有 弟弟 的 学生 有 8 名 ． 根据 上面 的 数据 试 求 小 明 班上 共有 学生 多少 名 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5224", "content": "200 比 一个 数 的 5 倍 多 35 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4282", "content": "家庭财产 每年 保险费率 是 0.3% ， 若 保险金额 为 50000 元 ， 则 每年 需 交纳 保险费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21313", "content": "师傅 加工 了 360 个 零件 ， 比 徒弟 加工 零件 个数 多 20% ． 师傅 比 徒弟 多 加工 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11166", "content": "松树 有 15 棵 ， 杨树 的 棵 数 是 松树 的 3 倍 ， 柳树 的 棵 数 比 松树 和 杨树 的 总 棵 数 少 6 棵 ． 柳树 有 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6417", "content": "果园 里 有 16 行 桃树 ， 每行 10 棵 ， 苹果树 是 桃树 的 8 倍 ， 苹果树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9339", "content": "圆形 花坛 的 周长 是 62.8 米 ， 它 的 直径 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17221", "content": "爸爸 把 6000 元 存入 银行 ， 定期 3 年 ， 年利率 是 3.33% ， 到期 可 得 利息 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15391", "content": "甲 、 乙 两地 相距 200 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 80 千米 ， 2 小时 后 ， 这辆 汽车 距 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13714", "content": "服装厂 原来 做一套 学生装 用布 3.2 米 ， 改进 裁剪 方法 后 ， 每套 节约 用布 0.2 米 ， 原来 做 150 套 学生装 用 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9708", "content": "甲 骑 自行车 追赶 前面 步行 的 乙 ， 乙 的 速度 是 每分钟 60 米 ， 甲 的 速度 是 每分钟 150 米 ． 甲 出发 8 分钟 追 上 了 乙 ， 那么 乙 比 甲 早 出发 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22924", "content": "果园 有 苹果树 400 棵 ， 桃树 是 苹果树 的 80% ， 相当于 梨树 的 40% ， 梨树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11415", "content": "客车 和 货车 同时 从 甲地 开往 乙地 ， 经过 10 小时 后 ， 客车 落 在 货车 后面 80 千米 ， 客车 每 小时 行 45 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11548", "content": "要 装订 一批 图书 ， 如果 每天 装 钉 60 本 ， 要 5 天 完成 ． 如果 要 4 天 完成 ， 每天 应 装 钉 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22246", "content": "水果店 运 来 560 千克 苹果 ， 运 来 桔子 数 是 苹果 的 1.5 倍 ， 水果店 运 来 多少 千克 桔子 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7782", "content": "2.3 - 1.8 的 差 ， 加上 1.25 / 0.25 的 商 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6299", "content": "一 根 木头 长 10 米 ， 把 它 锯 成 1 米 长 ， 每次 用 时 3 分钟 ， 锯 完 这根 木头 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7233", "content": "修 一条 水渠 ， 甲队 3 天 修 (1/20) ， 乙 队 5 天 修 (1/10) ， 两队 合 修 多少 天 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19225", "content": "红旗 小学 今年 六年级 毕业 学生 人数 有 440 人 ， 比 去年 多 了 10% ， 去年 六年级 毕业 学生 人数 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21168", "content": "一 根 彩带 8 米 长 ， 剪下 (3/4) 后 又 剪下 (3/7) 米 ， 彩带 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5774", "content": "两列 火车 分别 从 相距 868 千米 的 甲 、 乙 两站 相对 开出 ， 经过 3.5 小时 两车 相遇 ， 若 甲 车 每 小时 行 118 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10566", "content": "把 (4/5) 千克 盐 平均 分装 在 4 个 小袋 里 ， 每 小袋 盐 的 重量 是 1 千克 的 多少 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7225", "content": "一 辆 自行车 的 轮胎 的 外 直径 是 0.7 米 ， 如果 平均 每 分 转 90 周 ， 通过 一座 989.1 长 的 桥 ， 需要 几分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13161", "content": "师徒 两 人 共同 加工 一批 零件 ， 徒弟 加工 了 65 个 ， 师傅 加工 的 个数 比 徒弟 的 3 倍 少 10 个 ， 师傅 加工 了 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4398", "content": "计算 ： 3 - (3/11) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17016", "content": "a 城 与 b 城 相距 762 千米 ， 一辆 汽车 每 小时 行驶 80 千米 ， 行驶 了 8 小时 ， 还要 行驶 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "881", "content": "新世纪 学校 师生 880 人 去 秋游 ， 每人 车票 15 元 ， 门票 50 元 ， 全校 共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4183", "content": "某 厂 男 职工 占 全厂 的 (4/7) ， 其中 (3/8) 的 男 职工 参加 夜校 学习 ， 已知 参加 夜校 的 男 职工 有 84 人 ． 则 该厂 女职工 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21042", "content": "一 个 等腰三角 形 的 腰 长 8 厘米 ， 底 长 6 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11076", "content": "一 项 工程 ， 在 规定 时间 里 ， 甲 完成 了 (1/3) ， 乙 完成 了 (1/2) ． 则 甲 、 乙 共 完成 这项 工程 的 多少 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7201", "content": "一 头 鲸 的 体长 是 35 米 ， 头 部长 占 总长 的 (2/5) ， 这 头 鲸 的 头 部长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17333", "content": "□ / （ 42 - 30 ） = 8 ， □ 里 应 填 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21603", "content": "一 列 火车 长 360 米 ， 每秒钟 行驶 18 米 ， 全 车 通过 一座 长 是 车身 长 的 (1/4) 的 桥 ． 需要 多少 时间 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11226", "content": "把 8 个 红球 和 5 个 蓝球 放进 一个 口袋 里 ， 从 口袋 里 任意 摸 出 一个 ， 摸 出 蓝球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12941", "content": "赵师傅 加工 一批 零件 ， 原 计划 每天 加工 48 个 ， 25 天 可以 完成 任务 ， 实际 每天 只能 完成 原 计划 的 (5/8) ， 这 批 零件 要 加工 多少 天 才能 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7210", "content": "京广中心 大厦 高 209 米 ， 比 中央 电视塔 矮 约 196 米 ， 中央 电视塔 高 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4589", "content": "一 根 绳子 ， 用 去 它 的 (3/8) ， 剩下 的 正好 比 用 去 的 多 7 米 ． 这根 绳子 原来 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3567", "content": "花生仁 的 出油率 是 38% ， 要 榨油 570 千克 ， 需 花生仁 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10883", "content": "养鸡场 用 3000 个 鸡蛋 孵小鸡 ， 5% 的 没有 孵出来 ， 孵出来 的 小鸡 有 多少 只 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21827", "content": "拖拉机 以 每 小时 20 千米 的 速度 行驶 一段 路程 后 ， 立即 沿 原 路 以 每 小时 30 千米 的 速度 返回 原 出发地 ， 这样 往返 一次 的 平均速度 是 每 小时 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19426", "content": "配制 一种 药水 ， 药粉 和 水 的 质量 比 是 2 ： 85 ． 现有 药粉 8 克 ， 需 加水 多少 克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22093", "content": "(5/4) 吨 的 (2/5) = 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1683", "content": "食堂 第一次 买 大米 250 千克 ， 第 二 次 买 大米 300 米 ， 每千克 大米 2.9 元 ． 两次 买 大米 共 付 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20048", "content": "用 0.5 与 3.6 的 积 除以 两个 0.3 的 积 ， 商 = ？ （ 列出 综合 算式 计算 ）", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3613", "content": "一 件 上衣 原价 是 200 元 ， 降价 (1/10) 后 ， 比 原价 便宜 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8184", "content": "某 伞 厂 为 支援 四川 抗震 赶 产 一批 帐篷 ， 第一天 生产 了 总 帐篷 数 的 20% ， 第 二 天 生产 了 总 帐篷 数 的 (7/20) ， 两天 共 生产 帐篷 4400 顶 ． 这 批 帐篷 一共 有 多少 顶 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18530", "content": "埃及 金字塔 现在 高度 大约 140 米 ， 比 建成 时 低 了 (1/21) ， 建成 时 大约 高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22819", "content": "有 一个 长方体 容器 ， 从 里面 量 长 5 分 米 ， 宽 4 分 米 ， 高 6 分 米 ， 里面 注 有 水 ， 水深 3 分 米 ， 如果 把 一 棱 长 2 分 米 的 正方体 铁块 完全 浸没 在 水中 ， 水面 上升 多少 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3212", "content": "雅乐 学校 202 班 有 12 个 小朋友 参加 健美操 比赛 ， 从前 数 小 凡 排 在 第 6 个 ， 从 后 数 小 凡 排 在 第 多少 个 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7134", "content": "把 一批 图书 按 5 ： 3 的 比例 分给 一 、 二年级 ， 已知 一年级 比 二年级 多分 得 40 本 ． 这 批 图书 共有 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22592", "content": "某 工厂 去年 实际 产值 2400 万元 ， 比 计划 增长 (3/5) ， 计划 产值 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18019", "content": "红红 买 了 两本书 ， 一本 是 18.6 元 ， 另 一本 是 26.9 元 ， 口袋 里 还 剩 18.3 元 ， 红红 原来 有 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6089", "content": "甲乙 两 数 的 比 是 7 ： 3 ， 甲 数 比 乙 数多 36 ． 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7770", "content": "菜场 运 来 白菜 750 千克 ， 运 来 的 萝卜 比 白菜 少 (2/3) ， 运 来 萝卜 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "463", "content": "一 根 电线 ， 装修 工人 剪 去 同样 长 的 7 段 ， 每 段长 18 米 ， 还 剩下 45 米 ， 这根 电线 原来 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1146", "content": "一 块 麦地 ， 去年 共 收 小麦 1327 千克 ， 今年 一共 收 了 35 袋 ， 每 袋 53 千克 ， 今年 比 去年 多 收 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20201", "content": "好又多 超市 大 促销 ， 王 强 带 着 妹妹 一起 去 淘宝 ， 王 强 原来 有 20 元 ， 给 妹妹 6.5 元 后 ， 妹妹 还 比 他 少 1.3 元 ， 现在 妹妹 有 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1857", "content": "某 星期日 ， 小 伟 做 语文 作业 用 了 (2/5) 小时 ， 做 数学 作业 比做 语文 作业 少 用 了 (2/15) 小时 ． 他 做 语文 作业 和 数学 作业 一 共用 了 多少 小时 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14094", "content": "水果店 运 来 一批 苹果 ， 第一天 卖 了 总数 的 30% ， 第 二 天 卖 的 相当于 第一天 销量 的 120% ， 比 第一天 多 卖 了 48 千克 ， 水果店 这 批 共 运进 多少 千克 水果 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14838", "content": "有 一批 货物 ， 原 计划 16 天运 完 ， 实际 每天 多云 5 吨 ， 结果 12 天 就 运 完 了 ． 问 ： 这 批 货物 原有 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1252", "content": "从 一张 长 20 厘米 ， 宽 14 厘米 的 长方形 纸 上 剪下 一个 最大 的 正方形 ， 这个 正方形 的 面积 为 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1133", "content": "一 篇文章 原稿 有 14 页 ， 每页 24 行 ， 每行 25 个 字 ． 如果 改 排成 每行 28 个 字 ， 每页 30 行 ， 那么 这 篇文章 要 排 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4507", "content": "收入 超过 3000 元 ， 不足 5000 元 ， 超出 的 部分 要 按照 3% 的 税率 缴纳 个人所得税 ． 小 军 爸爸 每月 的 工资 是 3800 元 ， 他 每个 月 要 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22778", "content": "一 件 衣服 第一天 按 原价 出售 ， 没 人 买 ； 第 二 天 降价 10% ， 仍 没 人 买 ； 第 3 天 再 降价 70 元 ， 终于 售出 ， 出售 的 价格 恰好 是 原价 的 65% ． 这件 衣服 原价 是 几元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9421", "content": "每张 桌子 48 元 ， 每 把 椅子 32 元 ， 学校 买来 138 套 桌椅 ， 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8262", "content": "一 个 棱 长 5 米 的 正方体 水池 ， 水池 占地面积 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18724", "content": "从 扬州 到 南京 的 路程 有 90 千米 ， 一辆 汽车 从 扬州 开往 南京 ， 已经 行 了 35 千米 ， 行 了 全程 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4572", "content": "22 * 47 + 42 * 53 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14681", "content": "王 伯 在 批发市场 买 了 一箱 15 kg 的 红富士 苹果 共 45 元 ． 他 拿到 他 的 小店 ， 以 每 kg 4.5 元 出售 ， 一箱 苹果 卖完 后 ， 他 赚 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11117", "content": "丁丁 的 爸爸 买 了 一套 家庭影院 音响 组合 ， 价值 17000 元 ， 他 先付 5000 元 做 首期 ， 然后 剩下 的 做 12 个 月 免息 分期付款 ． 请问 丁丁 的 爸爸 每月 供 款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19511", "content": "有 两捆 电线 ， 一捆 长 100 米 ， 比 另 一捆 短 (1/5) ， 另 一捆 电线 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3001", "content": "有 5 名 运动员 ． 他们 的 体重 分别 为 76 kg 、 73 kg 、 78 kg 、 72 kg 、 75 kg ， 他们 的 平均 体重 = ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "621", "content": "某 数 的 8 倍 与 它 的 5 倍 的 差 等于 135 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14074", "content": "王大妈 将 4000 元 存入 银行 ， 定期 2 年 ， 年利率 是 4.40% ， 到期 时 ， 她 应得 多少 元 的 利息 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3991", "content": "李 阿姨 在 农贸市场 买 了 7.5 千克 黄瓜 ， 付给 售货员 12 元 ， 找回 0.75 元 ． 每千克 黄瓜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19780", "content": "王师傅 做 一批 零件 ， 3 小时 完成 ． 前 两 小时 共 做 125 个 后 ， 后 一 小时 做 55 个 ， 他 平均 每 小时 做 多少 个 零件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18367", "content": "食堂 二 月份 用 煤 1600 千克 ， 比 一月份 节约 20% ． 一月份 用 煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14729", "content": "一 筐 水果 连 筐 共 重 50 千克 ， 卖出 水果 的 50% 后 ， 连 筐 共 重 27 千克 ， 水果 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2487", "content": "仓库 里 有 一批 化肥 ， 运出 总数 的 (4/9) 后 ， 又 运进 35 吨 ， 这时 仓库 里 的 化肥 是 原来 的 (3/4) ， 仓库 里 原有 化肥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13320", "content": "饲养 小组 养 的 小白兔 是 小 灰 兔 的 (3/5) ， 小 灰 兔 比 小白兔 多 24 只 ， 小白兔 和 小 灰 兔 共 多少 只 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2181", "content": "大小 齿轮 的 个数 比 是 8 ： 5 ， 小齿轮 有 30 个 齿 ， 大 齿轮 有 多少 个 齿 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4948", "content": "一 头 亚洲象 重 6.5 吨 ， 是 一头 奶牛 的 13 倍 ， 这 头 亚洲象 比 这 头 奶牛 重 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15252", "content": "某 房间 需 粉刷 的 面积 约 80 平方米 ， 一般 每平方米 需用 涂料 0.5 千克 ， 但 在 实际 粉刷 时会 有 损耗 ， 因此 要 多 准备 (1/10) ， 实际 应 准备 多少 千克 涂料 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13235", "content": "奶牛场 有 6 个 牛棚 ， 每个 牛棚 里 有 8 头 奶牛 ， 一天 共 喂 饲料 960 千克 ， 平均 每 头 奶牛 每天 喂 饲料 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2884", "content": "在 一个 直径 为 6 厘米 的 半圆 中 再 剪掉 两个 直径 分别 是 2 厘米 和 4 厘米 的 半圆 ， 现在 图形 的 周长 = 多少 厘米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "12578", "content": "一 只 青蛙 7 天 大约 能 吃 980 只 害虫 ， 照 这样 计算 ， 一只 青蛙 一个月 大约 能 吃 多少 只 害虫 ？ （ 一个月 按 30 天 计算 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4977", "content": "每 袋 化肥 40 元 ， 刘 叔叔 买 了 16 袋 ， 钱 还 剩 35 元 ． 他 带 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19073", "content": "把 5 米 长 的 木棒 ， 平均 锯 成 6 段 ， 每 锯 一段 要 2 分钟 ， 共 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6005", "content": "张 阿姨 买 了 一套 《 安徒生 童话 》 集 ， 共 3 本 ， 付 了 50 元 ， 找回 2.6 元 钱 ． 平均 每 本书 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9182", "content": "甲 书架上 的 书 比 乙 书架上 的 书 多 60 本 ， 已知 甲 书架上 的 书 的 本 数 占 总数 的 60% ． 甲 、 乙 两个 书架 共有 多少 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9340", "content": "梅子 9 岁 ， 小 兰 6 岁 ， 小 明 4 岁 ， 小 午 和 梅子 同岁 ， 他们 的 平均年龄 = 多少岁 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16377", "content": "李老师 给 学校 买 图书 用 了 245 元 ， 买 体育用品 用 了 184 元 ， 他 带 了 500 元 ， 还 剩 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18494", "content": "李 阿姨 打 1 份文件 ， 前 3 分钟 打 了 240 个 字 ， 照 这样 的 速度 ， 再 用 6 分钟 就 能 打 完 ． 这份 文件 有 多少 个 字 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5664", "content": "存入 银行 3000 元 钱 ， 定期 3 年 ， 年利率 是 2.70% ， 到期 时 可 得到 税后 利息 多少 元 ． （ 按照 利息 的 5% 缴纳 利息税 ） ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "211", "content": "明明 和 圆圆 比赛 跳绳 ， 明明 跳 了 45 下 ， 圆圆 比 明明 少 跳 23 下 ， 圆圆 跳 了 多少 下 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20725", "content": "一 部 电视片 全长 490 分钟 ， 播出 8 集 后 还 剩 210 分钟 ． 这部 电视片 平均 每集 长 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15846", "content": "一 个数 的 3.5 倍 是 21 ， 这个 数 的 100 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18188", "content": "花园 小区 有 2 幢 5 层 的 住宅楼 ． 一共 有 60 户 人家 ． 平均 每 幢 楼 每层 有 几户 人家 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3177", "content": "“ 5 一 ” 期间 ， 学校 将 组织 同学 们 游园 ， 准备 让 30 人 参加 ， 一共 要 付 900 元 入场费 ， 还要 租 一辆车 要 付 150 元 ， 请 同学 们 算 一 算 平均 每人 要 交 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4410", "content": "商场 购进 红糖 60 千克 ， 比 购进 的 白糖 的 (5/7) 多 10 千克 ， 购进 白糖 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3099", "content": "商店 各 进 了 苹果 和 梨子 25 筐 ， 苹果 每 筐 88 元 ， 梨子 每 筐 112 元 ， 进 这些 苹果 和 梨子 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5054", "content": "一 本 故事书 ， 哥哥 每天 看 120 页 ， 看 了 9 天 后 ， 还 剩 30 页 没 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3878", "content": "李老师 给 学校 买 图书 用 了 239 元 ， 买 体育用品 花 民 261 元 ． 李老师 带 了 700 元 ， 还 剩 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6752", "content": "一 堆 沙子 重 240 吨 ， 运走 了 (3/8) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13470", "content": "在 一次 跳远 比赛 中 ， 小 李 跳 的 比 小张 多 0.11 米 ， 小张 跳 的 比 小 赵 少 0.06 米 ， 已知 小 赵 跳 了 1.5 米 ， 求 小 李 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21687", "content": "两列 火车 同时 从 ab 两地 相对 开出 ， 3 小时 相遇 ， 甲 车 每 小时 行 110 千米 ， 乙 车 每 小时 行 100 千米 ， ab 两地 间 的 距离 = 多少 千米 ？ （ 画 线段 图 分析 题意 并 解答 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10666", "content": "某村 共有 耕地 400 公顷 ， 其中 40% 是 旱地 ， 在 旱地 中 的 80% 种 棉花 ， 种 棉花 的 地 有 多少 公顷 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1722", "content": "601 班 有 50 人 ， 女生 占 46% ， 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13685", "content": "兴隆 饭店 上 月 的 营业额 为 24000 元 ， 纳税 后 还 剩下 22800 元 ． 这个 饭店 是 按 怎样 的 税率 纳税 的 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12918", "content": "操场上 踢足球 的 有 9 人 ， 踢足球 的 人数 是 打 羽毛球 人数 的 (9/10) ， 打 羽毛球 的 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12574", "content": "一 条 水渠 ， 按 5 ： 8 分给 甲 、 乙 两队 修 ， 甲队 比 乙 队 少 修 15 米 ， 乙 队 修 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17601", "content": "如果 把 一根 木料 锯 成 5 段 用 15 分钟 ， 那么 用 同样 的 速度 把 这根 木料 锯 成 7 段 ， 要 用 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9865", "content": "有 红 、 黄 、 绿 3 种 彩带 ， 红 彩带 比 黄 彩带 长 (3/15) 米 ， 绿 彩带 比 黄 彩带 短 (1/15) 米 ． 红 彩带 与 绿 彩带 相差 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19768", "content": "用 4 个 边长 为 2 厘米 的 小 正方形 拼成 一个 大 正方形 ， 这个 大 正方形 的 周长 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21446", "content": "超市 运 来 大米 16 吨 ， 比 面粉 少 40% ． 运 来 面粉 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19798", "content": "一 辆 汽车 6 小时 行 了 全程 的 (2/3) ， 照 这样 的 速度 ， 行 完全 程 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14339", "content": "小 华 的 前几次 数学 测验 的 平均 成绩 是 80 分 ， 这 一次 得 了 100 分 ， 正好 把 这 几次 的 平均 成绩 提高 到 85 分 ． 这 一次 是 他 的 第几次 测验 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10892", "content": "商店 某种 洗衣机 按 定价 出售 ， 每 台 可以 获利 400 元 ． 现在 按 定价 的 0.8 出售 10 台 ， 所 能 获得 的 利润 ， 与 按 定价 每 台 减价 300 元 出售 15 台 所得 的 利润 一样 ． 洗衣机 每 台 定价 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15988", "content": "本月 产量比 上 月 超产 (3/7) ， 本月 产量 是 上 月 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4500", "content": "一 盒 彩色 胶卷 最 多 能 拍 36 张 照片 ， 照 这样 计算 ， 15 盒 胶卷 最 多 可以 拍 多少 张 照片 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11273", "content": "小 明 读 一 本书 ， 第一天 读 了 全书 的 (3/14) ， 第 二 天 比 第一天 多 读 26 页 ， 这时 已 读 的 与 剩下 的 页数 比 是 7 ： 5 ， 这 本书 小 明 还有 多少 页 没 读 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "7488", "content": "某 机床厂 去年 生产 机床 720 台 ， 比 原 计划 多 生产 机床 120 台 ， 去年 实际 生产 的 机床 数 超过 原 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8911", "content": "小 军 和小红 共有 故事书 52 本 ， 小 军 把 自己 的 书 的 (1/4) 送给 小 红 ， 此时 小 军 和小红 书 的 数量 比 是 6 ： 7 ． 最初 小 军 有 书 多少 本 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "23147", "content": "往 30 千克 盐 中 加入 多少 千克 水 ， 可 得到 含盐 率 为 30% 的 盐水 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10450", "content": "甲 数 的 (1/8) 等于 乙 数 的 (1/10) ， 甲 数 是 80 ， 乙 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12873", "content": "8 名 工人 15 天 共 织布 360 匹 ， 平均 每人每天 织布 多少 匹 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1940", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行驶 了 全程 的 (3/7) 后 ， 比 剩下 的 路程 少 15 千米 ． 这时 距 乙地 还有 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21640", "content": "一 本书 看 了 (4/5) ， 还 剩 15 页 ． 这 本书 一共 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20311", "content": "一 根 长方体 木料 的 体积 是 4.5 立方分米 ， 横截面 的 面积 是 0.5 立方分米 ， 木料 的 长 有 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8357", "content": "图书馆 买来 科技 书 2200 本 ， 是 文艺 书 的 25 倍 ． 买来 的 科技 书 和 文艺 书 一共 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17418", "content": "五年级 学生 栽树 1200 棵 ， 六年级 比 五年级 多 栽 (2/5) ， 六年级 学生 栽树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18781", "content": "妈妈 今年 34 岁 ， 小 明 今年 8 岁 ， 10 年 后 ， 妈妈 与 小 明 的 年龄 相差 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13709", "content": "2001 + 2002 + 2003 + 2004 + 2005 + 2006 + 2007 - 2008 = ．", "knowledge": ["+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "4728", "content": "学校 合唱队 有 80 人 ， 科技 组 的 人数 比 合唱队 的 (2/5) 多 4 人 ， 科技 组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22067", "content": "一 本 故事书 的 页数 是 68 页 ， 小 王 7 天 共 看 了 全书 的 (3/4) ， 小 王 一共 看 了 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4883", "content": "动物园 里 有 大象 7 头 ， 金丝猴 5 只 ， 金丝猴 的 数量 是 大象 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12009", "content": "学校 操场 的 环形 跑道 长 200 米 ， 小 王 和 小 李 两 人 同时 从 起跑线 沿 逆时针 方向 跑步 ， 小 王 每秒 7.5 米 ， 小 李 每秒 跑 5.5 米 ， 经过 多少 秒 两 人 第一次 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10088", "content": "张 村 现在 共有 土地 2400 公顷 ， 比 李 村 多 (1/5) ， 李 村 有 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21643", "content": "有 红旗 150 面 ， 黄旗 比 红旗 少 28% ． 黄旗 有 几面 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3321", "content": "水果店 今天 卖出 140 千克 苹果 ， 正好 比 梨 多 (2/5) ， 水果店 今天 卖出 梨 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "423", "content": "一 种 橙汁 饮料 每箱 有 24 罐 ， 每罐 进价 3 元 ． 某 超市 一次 进货 25 箱 ， 共 需 付款 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13209", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 1.5 小时 行 了 78 千米 ， 这时 离 乙地 还有 109.2 千米 ． 照 这样 的 速度 ， 这辆 汽车 从 甲地 到 乙地 一共 需要 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16590", "content": "在 公路 自行车 比赛 中 ， 小 李 骑 了 全程 的   (1/5) 后 又 行 了 62 千米 到达 a 地 ， 这 段 路程 比 全程 的   (2/3) 少 8 千米 ， 自行车 比赛 的 全程 = 多少 千米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22869", "content": "水果店 第一次 运 来 苹果 800 千克 ， 第 二 次 运 来 22 筐 ， 每 筐 25 千克 ， 两次 共运 来 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14136", "content": "游泳队 有 男生 28 人 ， 比 女生 人数 的 (5/6) 少 2 人 ， 游泳队 共有 队员 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14199", "content": "学校 动漫 组 有 25 人 ， 书法 组 有 17 人 ， 器乐 组 的 人数 是 书法 组 的 3 倍 ． 器乐 组 的 人数 比 动漫 组 多 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11263", "content": "两辆 汽车 同时 从 a 、 b 两站 出发 ， 相向 而 行 ， 6 小时 相遇 ． 甲 车 每 小时 行 40 千米 ， 乙 车 的 速度 比 甲 车 慢 (1/4) ， a 、 b 两站 间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7103", "content": "小商店 运 来 3 种 水果 ， 苹果 的 重量 是 橘子 的 (1/15) ， 鸭梨 的 重量 是 橘子 的 (1/12) ． 如果 运 来 的 苹果 有 480 千克 ， 运 来 的 鸭梨 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19591", "content": "一 台 拖拉机 上午 2 小时 共 耕地 1.5 公顷 ， 下午 耕地 3 小时 ， 每 小时 耕 0.8 公顷 ． 这 一天 中 这 台 拖拉机 平均 每 小时 耕地 多少 公顷 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18048", "content": "王明 去 县城 拉 货 ， 去 时 汽车 的 速度 为 40 千米 / 时 ， 行驶 了 5 小时 ． 回来 时 汽车 的 速度 为 50 千米 / 时 ， 回来 时 用 了 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19210", "content": "龟 兔 赛跑 ， 全程 2000 米 ， 乌龟 每分钟 爬行 25 米 ， 兔子 每分钟 跑 320 米 ． 兔子 自 以为 跑得快 ， 在 途中 睡 了 一 觉 ． 问 兔子 睡 多长时间 才 会 和 乌龟 同时 到达 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3804", "content": "一 桶 纯净水 ， 喝 去 5 升 ， 占 总量 的 (1/6) ． 还 剩下 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1396", "content": "张 华 读 一本 540 页 的 故事书 ， 3 天 读 了 45 页 ． 照 这样 的 速度 ， 一共 需要 多少 天 读完 这本 故事书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6647", "content": "果园 里 有 桃树 289 棵 ， 梨树 比 桃树 多 118 棵 ， 果园 里 有 梨树 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "709", "content": "一 件 价格 1250 元 的 大衣 ， 现在 打 0.8 优惠 ， 如果 使用 贵宾卡 可以 再 打 0.95 ． 妈妈 用 贵宾卡 买 这件 大衣 用 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21147", "content": "某 工人 装配 一批 零件 ， 计划 每天 装配 60 个 ， 40 天 可以 装配 完 ． 实际 每天 装配 了 80 个 ， 实际 装配 了 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18375", "content": "工地 运 来 一批 钢材 ， 其中 圆形 钢材 2 吨 ， 方形 钢材 (2/5) 吨 ， 其它 钢材 (1/7) 吨 ， 这 批 钢材 共有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15541", "content": "农场 有 羊 500 头 ， 牛 比 羊 的 头数 多 (1/4) ， 牛 有 多少 头 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1729", "content": "实验 学校食堂 买来 4000 千克 面粉 ， 吃 了 一些 后 还 剩 3 袋 ， 每 袋 25 千克 ， 吃 了 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13297", "content": "计算 ： (5/24) + (5/14) + (2/63) - (2/15) - (7/18) - (3/40) = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "13503", "content": "菜地 里 共 收获 835 千克 白菜 ， 装 了 27 筐 后 ， 还 剩 25 千克 ． 平均 每 筐 装 多少 千克 白菜 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12314", "content": "一 个 物体 在 地球 上 受到 1 牛顿 重力 ， 在 月球 上 受到 的 重力 大约 为 0.16 牛顿 ． 一个 物体 在 地球 上 受到 58 牛顿 的 重力 ， 它 在 月球 上 受到 的 重力 大约 = 多少 牛顿 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11466", "content": "20 个 小朋友 站 成 一排 ． 如果 要 选 相邻 的 4 个 小朋友 表演 节目 ， 有 多少 种 不同 的 选 法 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15772", "content": "学校 给 “ 4 好 少年 ” 发 奖品 ， 共 买来 6 箱 水彩笔 ， 每箱 32 盒 ， 把 这些 水彩笔 平均 分给 8 个 班 ， 每班 分 得 多少 盒 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3201", "content": "204 名 师生 去 划船 ， 如果 每 条 船 最 多 坐 6 人 ， 至少 需要 租 多少 条 船 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5696", "content": "李 英 把 5000 元 人民币 存入 银行 ， 定期 1 年 ， 年利率 是 2.25% ． 到期 时 ， 李 英 应得 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19883", "content": "5 、 六年级 同学 去 植树 ， 平均 每个 年级 植树 90 棵 ， 3 个 年级 植树 的 最 简 整数 比 是 2 ： 3 ： 4 ． 六年级 比 四年级 多 植树 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "1767", "content": "某 款 书包 原价 是 120 元 ， 如果 打 0.5 出售 ， 这 款 书包 要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3249", "content": "小 玉 今年 9 月 1 日 把 积攒 的 400 元 压岁钱 存入 银行 ， 定期 3 年 ， 年利率 2.89% ， 准备 到期 时 把 利息 捐给 希望工程 ， 到 时 她 可 捐款 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1450", "content": "一 项 工程 ， 甲 、 乙 两队 合 做 30 天 完成 ， 现在 甲队 单独 做 24 天 后 ， 乙 队 加入 ， 两队 又 合 做 了 12 天 ， 这时 甲队 调 走 ， 乙 队 继续 做 15 天才 完成 这项 工程 ． 甲队 单独 做 这项 工程 需 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2406", "content": "甲 、 乙 两地 相距 660 千米 ， 两辆 汽车 同时 从 甲乙 两地 相对 开出 ， 经过 6 小时 相遇 ， 相遇 后 两车 又 继续 行驶 了 2 小时 ， 这时 两车 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20747", "content": "一 个数 除以 8 ， 商 是 6 ， 余数 是 7 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19465", "content": "一 个 平行四边形 4 条 边 长度 相等 都 是 5 厘米 ， 高 是 3 厘米 ， 求 这个 平行四边形 面积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4471", "content": "公交车 上 有 一些 乘客 ， 到 了 文峰 大 世界 下去 了 18 人 后 车上 还 剩 16 人 ． 公交车 上 原有 乘客 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "226", "content": "筑路 队 修筑 一条 长 1200 米 的 公路 ， 甲队 单独 修 40 天 可以 完成 任务 ， 乙 队 单独 修 30 天 可以 完成 任务 ． 甲队 每天 修 的 比 乙 队 少 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3194", "content": "简便 计算 ． 0.7777 * 0.7 + 0.1111 * 5.1 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11435", "content": "一 堆 煤 重 5 吨 ， 用 了 (3/8) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12402", "content": "甲 数 是 150 ， 乙 数 比 甲 数多 20% ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2863", "content": "5 （ 1 ） 班 同学 分 两组 参加 割草 劳动 ， 第一组 24 人 ， 平均 每人 割草 32.5 千克 ， 第 二 组 26 人 共 割草 728 千克 ． 全班 平均 每人 割草 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11436", "content": "一 条 毛毛虫 从 幼虫 长 到 成虫 ， 每天 长大 一倍 ， 第 24 天时 长 到 20 厘米 ， 当 它 长 到 5 厘米 时 是 第 多少 天 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6167", "content": "学校 为 每个 班级 配备 一台 电视机 和 一台 计算机 ． 一台 电视机 2250 元 ， 相当于 一台 计算机 价格 的 (1/3) ． 一台 计算机 要 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16199", "content": "一 种 服装 ， 售价 96 元 ， 比 原来 降低 了 24 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22495", "content": "三年级 有 2 个 班 ， 共有 学生 96 人 ． 每个 班 分成 3 个 小组 ， 平均 每个 小组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14360", "content": "副食店 运 来 410 千克 鸡蛋 ， 上午 卖出 152 千克 ， 下午 卖出 174 千克 ， 副食店 还 剩下 多少 千克 鸡蛋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22832", "content": "用 420 千克 大豆 做 发芽试验 ， 发芽率 是 90% ， 发芽 的 大豆 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6438", "content": "一 个数 除以 7 ， 商 是 13 ， 余数 是 2 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22398", "content": "武汉 到 宜昌 的 公路 长 420 千米 ， 一辆 货车 去 时 装满 货物 每 小时 行 60 千米 ， 返回 时 空车 每 小时 70 千米 ． 返回 时 比 去 时 节省 了 多少 时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8025", "content": "用 每千克 8.4 元 的 奶糖 2 千克 ， 每千克 5.6 元 的 水果糖 3 千克 ， 每千克 6.9 元 的 酥糖 4 千克 ， 混合 成 什锦糖 ． 这种 什锦糖 每千克 的 价格 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "5211", "content": "图书室 的 老师 带 1500 元 到 书店 买 故事书 ， 计划 买 50 本 ， 但 还 缺少 15 元 ． 每 本 故事书 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8318", "content": "小 东 数数 ， 从 9 开始 数起 ， 数 到 99 时 ， 小 东 数 了 多少 个数 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6633", "content": "打字员 小张 要 打 360 页 稿子 ， 原 计划 6 天 完成 ， 实际 4 天 就 完成 了 ． 实际 每天 比 原 计划 每天 多 打 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6462", "content": "小 敏 家 上 月 交 电费 30 元 ， 这个 月 电费 比 上个月 多 交 了 (2/3) ， 她家 这个 月 多 交 电费 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14502", "content": "学校 图书馆 有 4 个 书架 ， 平均 每个 书架上 放 书 360 本 ， 把 这些 书 平均 分给 6 个 年级 ， 平均 每个 年级 分 到 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19563", "content": "仓库 运 来 含水量 为 90% 的 一种 水果 100 千克 ． 一 星期 后 再 测 ， 发现 含水量 降低 到 80% ． 现在 这 批 水果 的 质量 = 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13956", "content": "张老师 要 买 19 张 软盘 和 12 张 光盘 ， 每张 软盘 6 元 ， 每张 光盘 要 15 元 ． 他 实际 用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15000", "content": "王师傅 和 李师傅 各自 要 做 360 个 零件 ， 王师傅 每 小时 做 18 个 ， 李师傅 每 小时 做 24 个 ， 李师傅 比 王师傅 快 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13319", "content": "水果店 运 来 16 筐 苹果 和 20 筐 梨 ， 一共 1360 千克 ． 苹果 每 筐 35 千克 ， 梨 每 筐 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15565", "content": "甲 、 乙 、 丙 3 人 共同 加工 一批 零件 ， 甲 加工 的 零件 数 与 乙 、 丙 两 人 加工 零件 总数 的 比 是 1 ： 2 ， 甲 、 乙 两 人 共 加工 了 105 个 零件 ， 乙 加工 了 这 批 零件 总数 的 (1/4) ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6599", "content": "一 段 路 长 1900 米 ， 已经 走 了 940 米 ， 剩下 的 要 20 分钟 走 完 ， 平均 每分钟 要 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16316", "content": "322 是 7 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9994", "content": "小 明 家 养鸡 是 养 鹅 的 9 倍 ， 养 鹅 45 只 ， 鸡 比 鹅 多 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11731", "content": "□ / 5 = 72 … □ 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13740", "content": "38 除 一个 数 ， 商 27 ， 余 35 ， 求 这个 数 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1226", "content": "一 批 大米 ， 上午 运走 全部 的 (1/4) ， 下午 又 运走 240 千克 ， 这时 已经 运走 的 大米 占 全部 大米 的 (5/8) ． 这 批 大米 共 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20136", "content": "150 千克 减少 它 的 (1/3) 后 ， 又 减少 40 千克 ， 结果 = 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6974", "content": "一 件 衣服 打 0.8 后 的 价钱 是 160 元 ， 这件 衣服 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22873", "content": "小 明 看 一 本书 ， 前 3 天 看 了 105 页 ， 小 明 共用 12 天 把 这 本书 看 完 ， 这 本书 有 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2691", "content": "商店 上 月 卖出 电视机 19 台 ， 这个 月 卖出 电视机 的 台数 比 上 月 的 2 倍 少 8 台 ， 每 台 电视机 售价 405 元 ， 商店 这个 月 卖 电视机 收入 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10998", "content": "甲 、 乙 两辆 汽车 同时 从 相距 450 千米 的 两地 相向 而 行 ， 经过 2 小时 相遇 ． 已知 甲 、 乙 两辆车 的 速度 比 是 5 ： 4 ， 乙 车行 完全 程 需要 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7934", "content": "4 个 (1/8) 与 多少 个 (1/10) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4316", "content": "生产 一批 零件 ， 原来 每个 零件 用 钢材 3.4 千克 ， 技术革新 后 ， 每个 零件 节约 钢材 0.4 千克 ， 原来 生产 300 个 零件 的 钢材 ， 现在 可以 生产 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9907", "content": "为了 支援 受灾 学校 的 学生 ， 新华 小学 部分 学生 开展 了 捐书 活动 ． 四年级 捐 120 本 ， 五年级 捐 的 图书 是 四年级 的 3 倍 ， 六年级 捐 的 本 数 比 五年级 多 20 本 ． 新华 小学 六年级 学生 捐 了 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7090", "content": "一 个 比例 的 两个 内 项 分别 是 0.8 和 20 ， 两个 外 项 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8863", "content": "学校 红领巾 电视台 要 在 4 名 男生 和 5 名 女生 中 挑选 男 、 女 主持人 各 一名 ， 小 东 是 男生 中 的 一位 ， 他 被 选中 的 可能 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14322", "content": "一 个数 的 4 倍 比 15 的 (1/3) 多 7 ， 求 这个 数 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18943", "content": "张老师 写 了 3 篇文章 ， 得 稿费 3400 元 ， 超出 800 元 以上 部分 按 14% 缴纳 个人所得税 ． 张老师 缴税 后 实 得 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5154", "content": "同学 们 参加 社会 实践 活动 ， 15 人 2 小时 糊 纸盒 900 只 ， 平均 每人 每 小时 糊 纸盒 多少 只 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1726", "content": "果园 里 有 梨树 120 棵 ， 桃树 棵 数 是 梨树 的 (4/5) ， 苹果树 棵 数 是 桃树 的 (2/3) ， 苹果树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21736", "content": "5 吨 煤 卖出 20% 后 ， 又 卖出 剩下 的 (3/4) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "11561", "content": "一 袋 大米 ， 第一次 倒 出 8 kg ， 第 二 次 倒 出 余下 的 (1/4) ， 这时 袋 里 还有 大米 (3/4) kg ． 这 袋 大米 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20102", "content": "一 个 长 20 厘米 ， 宽 15 厘米 ， 高 12 厘米 的 长方体 水箱 ， 里面 盛 有 8 厘米 深 的 水 ． 现 将 一 石块 浸没 于 水中 后 ， 水面 上升 了 3 厘米 ， 石块 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6200", "content": "每千克 牛肉 36 元 ， 每千克 苹果 14 元 ， 李 叔叔 买 牛肉 和 苹果 各 3 千克 ， 共 要 用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11733", "content": "一 条 大路 有 1000 米 ， 路 的 一边 一共 栽 了 51 棵 树 （ 两端 都 栽 ） ． 每 两棵树 之间 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1001", "content": "有 小学生 270 人 ， 分成 9 队 ， 每队 再 分成 3 组 ， 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11858", "content": "张师傅 要 生产 600 个 零件 ， 已经 生产 了 120 个 ， 剩下 的 要 10 天 完成 ， 平均 每天 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13659", "content": "一 个 垃圾 处理厂 第一天 处理 垃圾 (2/5) 吨 ， 第 二 天 比 第一天 少 处理 (1/6) 吨 ， 这 两天 一共 处理 垃圾 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4887", "content": "一 本 故事书 小 明 要 12 天 看 完 ， 前 5 天 每天 看 18 页 ， 后 7 天 每天 20 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13935", "content": "用 一段 长 4 米 的 布料 可以 裁 5 件 同样 大小 的 背心 ． 做 一件 背心 要 用 多少 布 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2174", "content": "修 一条 路 ， 已修 和 未 修 的 千米 数 比 是 3 ： 5 ． 如果 再 修 12 千米 ， 则 已修 的 和 未 修 的 千米 数 比 为 9 ： 11 ． 这 条 路 共 长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "17914", "content": "小 红 拿出 自己 钱 的 (4/7) ， 小 丽 拿出 自己 钱 的 (3/5) ， 两 人 各 买 一本 同样 的 字典 ， 已知 小 红 原有 21 元 ， 求 小 丽 原有 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19847", "content": "某校 五年级 一班 男生 有 23 人 ， 女生 有 25 人 ． 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1960", "content": "服装厂 加工 1500 套 校服 ， 3 天 完成 了 (1/5) ， 剩下 的 还要 （ 多少 ） 天 才能 完成 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21162", "content": "某种 商品 因 换季 准备 打折 出售 ， 如果 按 定价 的 0.75 出售 ， 将 赔 25 元 ， 而 按 定价 的 0.9 出售 ， 将 赚 20 元 ， 这种 商品 的 定价 为 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15064", "content": "一 件 皮衣 打 0.8 出售 ， 比 原价 便宜 了 145 元 ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8832", "content": "某 电视机厂 计划 5 月份 生产 4000 台 电视机 ， 实际上 半月 生产 了 计划 的 (3/5) ， 下半月 生产 了 计划 的 (7/10) ． 这个 月 实际 超额 生产 电视机 多少 台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8330", "content": "学校 田径队 有 28 人 ， 合唱 的 人数 比 田径队 少 (5/7) ， 合唱队 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21127", "content": "修 一条 水渠 ， 第一天 修 了 150 米 ， 比 第 二 天 少 修 25 米 ， 两天 修 的 正好 占 这 条 水渠 的 (1/3) ， 这 条 水渠 的 全长 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10641", "content": "某 店 举行 节日 大 酬宾 冰箱 降价 380 元 ， 样品 再 降价 320 元 ， 样品 ： 3300 元 ． 这 台 冰箱 原价 = 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9850", "content": "一 件 上衣 卖 得 480 元 ， 赚 了 20% ， 这件 上衣 的 进价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8787", "content": "甲班 人数 (1/3) 的 和 乙班 人数 (1/4) 的 共 29 人 ． 已知 甲班 有 42 人 ， 乙班 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17474", "content": "食堂 买来 (3/5) 吨 白菜 ， 买来 的 白菜 比 萝卜 多 (1/5) 吨 ， 买来 萝卜 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17286", "content": "商店 运 来 苹果 265 箱 ， 正好 是 运 来 梨 的 箱 数 的 (5/6) ． 商店 运 来 梨 有 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22074", "content": "李 林 有 120 张 邮票 ， 相当于 陆 红 的 (3/4) ． 陆 红 有 多少 张 邮票 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22168", "content": "李 毛 年初 买 了 一个 股票 ， 该 股票 当年 下跌 了 20% ， 第 二 年 应 上涨 多少 才能 保持 原值 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22754", "content": "一 个 竹竿 露出 水面 部分 为 3.6 米 ， 比 在 水中 部分 短 1.4 米 ， 这根 竹竿 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22349", "content": "6 名 教师 带 82 名 学生 去 农 博园 参观 ， 已知 团体 购票 ， 每张 学生票 10 元 ， 每张 成人 票 12 元 ， 算 一 算 ， 此次 活动 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10018", "content": "有 甲 、 乙 两箱 货物 共 重 24.72 千克 ， 甲 箱 重 15.3 千克 ． 甲 箱 比 乙 箱 重 多少 干 克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7282", "content": "一 段 电线 截取 (1/5) 后 再 接上 6 米 ， 结果 比 原来 长 (2/5) ， 原来 的 电线 长 = 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18948", "content": "从 (5/6) 里 减去 (1/3) 与 (1/9) 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22732", "content": "4 辆 汽车 7 天 可以 节约 汽油 35.28 升 ， 平均 每辆 汽车 每天 可以 节约 汽油 多少 升 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4211", "content": "妈妈 上 月工资 3500 元 ， 按规定 超出 3000 元 部分 ， 要 缴纳 5% 的 个人收入 所得税 ， 妈妈 上 月 实际 应得 工资 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18475", "content": "一 个数 除以 9 商 是 5 ， 余数 是 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15631", "content": "(1/4) 乘 一个 数 等于 (5/12) ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19651", "content": "一 条 公路 长 8000 米 ， 第一天 修 了 全长 的 30% ， 第 二 天 修 了 全长 的 50% ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5652", "content": "商场 运 来 58 只 篮球 ， 每 只 单价 125 元 ． 照 这样 计算 ， 再 运进 42 只 篮球 ， 一共 可 卖 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "738", "content": "停车场 里 有 360 辆 小汽车 ， 是 大 汽车 数量 的 4 倍 ． 货车 的 数量 是 大 汽车 的 (3/5) ， 货车 有 多少 辆 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4804", "content": "李 阿姨 花 了 120 元 钱 买 了 3 箱 苹果 ， 每箱 苹果 多少 元 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6733", "content": "一 个 圆柱 的 体积 是 40 立方分米 ， 底 面积 是 16 平方分米 ， 它 的 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5444", "content": "一 桶 油 连 桶 重 120 千克 ， 用 去 (3/7) 油 后 ， 连 桶 重 75 千克 ． 这 桶 油 原来 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5773", "content": "小 明 家 距离 公园 930 米 ， 他们 4.5 分钟 走路 270 米 ． 大约 需要 多长时间 到 公园 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11803", "content": "王 叔叔 一次 做生意 ， 投入 资金 2.8 万元 ， 获得 的 利润 相当于 投入 资金 的 (3/10) ． 王 叔叔 这次 做生意 的 利润 = 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18182", "content": "一 根 电线 用 去 (3/5) 米 ， 用 去 的 比 剩下 的 短 (1/6) 米 ， 这根 电线 原来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7189", "content": "一 个 圆柱 水桶 的 体积 是 28 立方分米 ， 底 面积 是 5.6 平方分米 ， 装 了 (2/5) 桶 水 ， 水 高 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8246", "content": "一 电器厂 去年 计划 生产 2400 台 电视机 ， 实际上 超产 35% ． 去年 实际 生产 了 多少 台 电视机 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16832", "content": "一 袋 大米 ， 吃 了 18 千克 ， 还 剩 32 千克 ， 吃 了 这 袋 大米 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20971", "content": "小 华 家 有 一只 长 40 厘米 、 宽 35 厘米 、 高 30 厘米 的 金鱼缸 ， 前面 和 左面 玻璃 破损 ， 需 重新 配制 ， 共 需 玻璃 多少 平方厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14875", "content": "李 3 用 了 72 元 买 了 2 张 票 明 0.9 的 电影票 ， 每张 电影票 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5178", "content": "12 个 同学 在 操场上 围成 一个 圆圈 做 游戏 ， 每 相邻 两名 同学 之间 都 是 2 米 ． 这个 圆圈 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16883", "content": "一 只 月饼 吃掉 了 (1/6) ， 剩下 的 占 这个 月饼 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7248", "content": "食堂 运 来 800 千克 大米 ， 已经 吃 去 (3/4) ， 吃 去 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3557", "content": "光明 小学 平均 每班 有 学生 42 人 ， 有 39 个 教学班 ， 全校 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4242", "content": "火车 从 甲 城 到 乙 城 ， 现已 行 了 200 千米 ， 是 剩下 路程 的 4 倍 ． 甲乙 两城 相距 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11175", "content": "工人 叔叔 做 一批 零件 ， 做 了 (5/9) 后 ， 还 剩 900 个 ， 这 批 零件 一共 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11882", "content": "一 根 电线 长 10.4 米 ， 比 另 一根 电线 长 0.8 米 ， 两根 电线 共 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14973", "content": "从 第一天 的 0 时 到 第 二 天 的 24 时 相距 多少 小时 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7161", "content": "兄弟两人 共同 投资 500 万元 合办 企业 ， 后来 弟弟 又 追加 20 万元 投资额 ． 这时 ， 哥哥 的 投资额 恰好 是 弟弟 投资额 的 3 倍 ． 则 哥哥 投资 了 多少 万元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17077", "content": "华华 出生 在 1998 年 ， 当 他 过 16 岁 生日 时 应 = 多少 年 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5748", "content": "5 （ 1 ） 班 有 女生 22 人 ， 占 全班 人数 的 44% ． 全班 有 几 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10577", "content": "把 (5/12) 平均 分成 5 份 ， 每份 = ？ 列出 算式 = ， 计算结果 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9877", "content": "一 个 修路 队 要 修路 2320 米 ， 已经 修 了 400 米 ， 剩下 的 如果 每天 修 160 米 ， 还要 几天 才能 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8836", "content": "学校 开 运动会 ， 12 个 班 共有 288 名 运动员 ， 平均 每个 班 有 多少 名 运动员 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14757", "content": "小 明 从 家 到 学校 步行 要 30 分钟 ， 如果 骑 自行车 每分钟 行 210 米 ， 要 8 分钟 ， 小 明 每分钟 步行 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6540", "content": "某区 计划 造林 120 公顷 ， 实际 造林 面积 比 计划 多 20% ， 实际 造林 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7649", "content": "一 个 因数 是 35 ， 另 一个 因数 是 62 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11682", "content": "小 华 从 家 骑车去 游乐园 ， 平均 每 小时 行 12 千米 ， 骑 了 2 小时 后 离 游乐园 还有 24 千米 ． 小 华 家 离 游乐园 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7937", "content": "小 红 的 体重 比 小 玲 重 5 千克 ， 小 玲 的 体重 比 小 红 轻 (1/7) ． 小 红 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19261", "content": "某 商店 委托 搬运 站 运送 150 只 花瓶 ． 双方 商定 每 只 运费 1 元 ， 但 如果 发生 损坏 ， 那么 每 打破 一只 不仅 不 给 运费 ， 而且 还 得 赔偿 2 元 ， 结果 搬运 站 共 得到 运费 135 元 ． 问 ： 搬运 过程 中共 打破 几只 花瓶 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13726", "content": "蓝天 商场 服装 打 0.9 ， 妈妈 买 了 一件 上衣 ， 花 了 108 元 钱 ， 这件 上衣 原来 卖 多少 元 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16659", "content": "比 一个 数多 10% 的 数 是 11 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20818", "content": "客轮 从 甲地 开往 乙地 ， 已知 甲乙 两地 相距 270 千米 ， 客轮 从 甲地 顺水 以 每 小时 27 千米 的 速度 航行 到 乙地 要 用 9 小时 ， 这样 水 速度 是 每 小时 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16941", "content": "在 200 米 长 的 道路 一侧 ， 随意 种 上 一些 小树 ， 如果 2 棵 小树 间 的 距离 不 超过 4 米 ， 那么 最少 能 种 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15859", "content": "同学 们 植树 ， 上午 植 了 132 棵 ， 下午 植 了 96 棵 ， 还有 85 棵 没 植 ． 一共 要 植树 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17628", "content": "果园 里 有 桃树 23 棵 ， 比 梨树 少 15 棵 ， 苹果树 的 棵 数 是 梨树 的 2 倍 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12552", "content": "张 大伯 家 有 一块 地 ， 种 玉米 用 去 这块 地 的 (1/6) ， 种 高粱 用 去 这块 地 的 (1/4) ， 种 这两项 农作物 共 约 用 去 这块 地 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14789", "content": "一 堆 煤 用 去 它 的 (2/5) 后 还 剩 3.6 吨 ， 到 用 去 它 的 (5/8) 时 ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7199", "content": "拉 百 商店 有 一批 儿童 套装 ， “ 6 一 ” 期间 每套 售价 175 元 ， 比 原来 定价 便宜 30% ， 原来 每套 定价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18035", "content": "学校 体育 室 有 篮球 96 只 ， 比 足球 只 数 的 3 倍 少 27 只 ， 体育 室 有 足球 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14166", "content": "种 着 一排 柳树 ， 每 两棵树 之间 相距 6 米 ， 小 明 从 第 1 棵 树 跑 到 第 100 棵 树 ， 一共 跑 了 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10403", "content": "某 车间 有 男工 48 人 ， 女工 比 男工 多 (1/8) ， 男 、 女工 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16618", "content": "从 16.2 里 连续 减去 多少 个 0.36 后 ， 结果 正好 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12980", "content": "芳 芳 买 了 8 箱 毛巾 ， 每箱 25 条 ， 共 花掉 600 元 ， 每 条 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7982", "content": "小 兰 的 妈妈 带 100 元 钱 去 买菜 ， 买 肉用 去 29.76 元 ， 买菜 用 去 5.34 元 ， 还 剩 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14244", "content": "修路 队 修 一条 公路 ， 如果 由 甲队 单独 修 要 15 天 ， 而 乙 队 每天 可以 修 44 米 ， 当 两队 共同 修 完 这 段 公路 时 ， 甲队 修 了 全长 的 60% ， 这 段 公路 全长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4727", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行驶 60 千米 ， 4 小时 到达 ． 返回 时 ， 因 空车 行驶 ， 只用 3 小时 ． 返回 时 每 小时 比 去 时 多行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16574", "content": "小 军 过生日 ， 妈妈 买来 一个 蛋糕 ， 切 了 (1/3) 给 小 军 ， 小 军 只 吃 了 其中 的 (1/2) ， 小 军 吃 了 整个 蛋糕 的 几分 之 几 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6336", "content": "三年级 进行 植树 活动 ， 一班 44 人 ， 二 班 46 人 ， 如果 每人 植树 6 棵 ， 三年级 一共 可 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14432", "content": "元旦 促销 期间 ， 李 阿姨 用 0.85 买 了 一台 原价 为 4000 元 的 液晶电视 ， 李 阿姨 要 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9202", "content": "一 个数 的 30% 是 (27/2) ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16811", "content": "师傅 一天 加工 250 个 零件 ， 徒弟 一天 加工 225 个 零件 ． 徒弟 每天 加工 的 零件 数 是 师傅 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20685", "content": "某 工程队 修 一段 铁路 ， 前 3 天 修 了 225 米 ， 照 这样 计算 ， 再 修 4 天 就 可以 修 完 ． 这 段 铁路 共 长 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17701", "content": "在 一个 比例 中 ， 两个 内 项 互为 倒数 ， 一个 外 项 是 12 ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16402", "content": "班级 图书 角 有 科技 书 11 本 ， 漫画书 14 本 ． 故事书 的 本 数 是 科技 书 和 漫画书 总数 的 4 倍 ， 故事书 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18813", "content": "小 红 每分钟 跳绳 65 下 ， 小 明 每分钟 跳 的 比 小 红 的 3 倍 少 16 下 ， 小 明 每分钟 跳 多少 下 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21304", "content": "甲乙 两 车间 共同 生产 一批 零件 ， 甲 车间 每天 生产 125 个 ， 乙 车间 每天 生产 175 个 ． 两个 车间 工作 6 天 后 ， 还 差 36 个 没 完成 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8748", "content": "学校 上个月 的 电费 是 96 元 ， 这个 月 比 上个月 节约 (1/6) ， 这个 月 的 电费 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10278", "content": "77.777 * 222.22 + 22.222 * 333.33 - 3.3333 * 4444.4 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9096", "content": "一 根 绳子 长 4 米 ， 第一次 用 去 (1/4) 米 ， 第 二 次 用 去 剩下 的 (2/3) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2968", "content": "张师傅 过去 生产 150 个 零件 需要 3 小时 ， 现在 减少 到 2 小时 ， 每 小时 工作效率 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2739", "content": "果园 里 有 45 棵 苹果树 和 36 棵 梨树 ， 梨树 的 棵 数 比 苹果树 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14969", "content": "某人 骑 自行 经过 了 一段 坡路 ． 上坡 以 每秒 4 米 的 速度 骑 了 60 秒 ， 下坡 以 每秒 6.5 米 的 速度 骑 了 40 秒 ． 自行车 在 这 坡 路上 行驶 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3492", "content": "果园 里 有 桃树 289 棵 ， 梨树 比 桃树 多 118 棵 ， 果园 里 共有 多少 棵 果树 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14971", "content": "一 个 热 水壶 原价 120 元 ， 现在 打 0.6 ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9244", "content": "小 明 读 一本 故事书 ， 已经 读 了 96 页 ， 还 剩下 (5/8) 没有 读 ． 这本 故事书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7246", "content": "制造 1 吨 纸 ， 需要 450 吨 水 ． 某 造纸厂 去年 生产 纸 625 吨 ， 制造 这些 纸 时 用 去 的 水 有 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16010", "content": "李 小 刚 的 妈妈 买 了 30 袋 牛奶 ， 小 刚 5 天 喝 了 (1/3) ， 平均 每天 喝 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10269", "content": "果园 里 有 梨树 500 棵 ， 梨树 的 棵 数 比 杏树 多 25% ， 果园 里 有 多少 棵 杏树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2228", "content": "某 童装 厂 第一 车间 生产 童装 489 件 ， 第 二 车间 生产 童装 479 件 ， 每 8 件 装 一箱 ， 一共 要 装 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1905", "content": "某 果园 今年 产 橘子 96 吨 ， 比 去年 增产 28% ． 去 年产 橘子 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17616", "content": "粮食 仓库 运 来 大米 18.5 吨 ， 比 运 来 的 小麦 多 2.86 吨 ， 运 来 的 玉米 比 大米 和 小麦 的 总数 少 4.09 吨 ， 运 来 玉米 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21387", "content": "张老师 骑 自行车 以 每 小时 15 千米 的 速度 ， 从 家 到 学校 ， 需 30 分钟 ． 现在 改 骑 电动车 ， 只 需 18 分钟 ． 张老师 骑 电动车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3362", "content": "修 一条 长 (9/5) 千米 的 公路 ， 第一周 修 了 (1/3) ， 第 二 周 修 了 (2/5) 千米 ， 还 剩 多少 千米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22763", "content": "师徒 两 人 制造 零件 ， 其中 师傅 完成 了 任务 的 (3/4) ， 徒弟 完成 任务 的 (2/3) ， 师徒 两 人 共 超额完成 了 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13153", "content": "张师傅 加工 一批 零件 ， 第一天 加工 了 这 批 零件 的 25% ， 如果 再 加工 30 个 ， 已经 加工 的 零件 和 这 批 零件 总数 的 比 就 刚好 是 2 ： 3 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22411", "content": "修 一条 路 ， 第一个 月 修 了 全路 的 (2/5) ， 第 二 个 月 修 了 30 千米 ， 正好 修 了 全长 的 (3/5) ， 求 第一个 月 修 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17015", "content": "一 个 西瓜 重 4 千克 ， 一个 冬瓜 比 它 重 8 千克 ， 冬瓜 的 重量 是 西瓜 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15107", "content": "修 一条 长 1500 米 的 路 ， 前 4 天 修 了 全长 的 (2/5) ． 照 这样 计算 ， 修 完 这 条 路 共 要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8840", "content": "北极 驯鹿 与 世界 其他 鹿 种 最大 的 不同 有 两点 ： 一 是 雌鹿 同 雄鹿 一样 都 长 着 树枝 般的 角 ， 二 是 驯鹿 像 候鸟 一样 人 冬 时节 往 南 迁移 ， 早春时节 ， 开始 向 北 进发 ． 常常 长途跋涉 500 ～ 700 千米 ， 甚至 上 千千米 ． 人们 也 有 的 把 驯鹿 驯养 后 拉 雪橇 ， 但 它 的 速度 比不上 企鹅 的 速度 ． 企鹅 滑雪 时速 最高 可 达 30 千米 ， 比 驯鹿 的 2 倍 少 4 千米 ． 驯鹿 拉 雪橇 的 时速 = 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1345", "content": "一 辆车 每 时 行 56 千米 ， 4.6 时 到达 目的地 ， 如果 要 提前 0.6 时 到达 ， 每 时 要 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17475", "content": "一 根 电线 ， 用 去 32.87 米 ， 比 剩下 的 多 8.99 米 ， 这根 电线 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4960", "content": "仓库 里 有 15 吨 钢材 ， 第一 小时 用 了 总数 的 20% ， 第 二 小时 用 去 4 吨 ， 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12441", "content": "学校 植树 ， 四年级 植树 84 棵 ， 是 三年级 植树 的 2 倍 ， 五年级 植树 的 棵 数 比 3 、 四年级 两个 年级 植树 的 总和 还 多 18 棵 ， 五年级 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11116", "content": "两个 修路 队 合 修 一段 公路 ． 甲队 3 天 修 了 (9/10) 千米 ， 乙 队 2 天 修 了 (1/2) 千米 ． 甲队 每天 比 乙 队 多 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4566", "content": "服装厂 4 人 2 天 能 做 120 套 衣服 ． 他们 平均 每人每天 做 几套 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5784", "content": "0.48 加上 它 的 (1/6) ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6822", "content": "一 部 书 分 上下 两册 ， 上 册页 数 的 (2/7) 等于 下 册页 数 的 25% ， 已知 下册 有 480 页 ， 上册 有 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17492", "content": "在 一道 算式 里 ， 被减数 和 减数 都 是 386 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4823", "content": "一 个 钢铁厂 ， 炼 750 千克 钢 需要 用 5 吨 水 ． 照 这样 计算 ， 钢铁厂 一天 节约 55 吨 生活 用水 ， 可以 炼钢 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9608", "content": "妈妈 存入 银行 8000 元 ． 定期 一年 ， 年利率 是 2.25% ， 一年 后 妈妈 共 取回 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10188", "content": "6 （ 1 ） 班 同学 买 了 24 米 彩带 ， 用 (1/3) 做 蝴蝶结 ， 用 (1/2) 做 中国 结 ， 还 剩下 多少 米 彩带 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7302", "content": "某 食品厂 去年 的 总收入 为 1020 万元 ， 按照 国家 规定 ， 需 缴纳 17% 的 增值税 ． 该厂 去年 应 缴纳 多少 万元 增值税 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12245", "content": "一 个数 的 1.2 倍 是 1.8 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18267", "content": "有 546 棵 杨 数 ， 平均 每天 栽 35 棵 ， 最后 还 剩 21 棵 ， 一共 栽 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5598", "content": "食堂 购进 大米 320 千克 ， 吃 了 296 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19467", "content": "阳光 水果店 运 来 水果 24 箱 ， 每箱 25 千克 ． 售出 一些 后 ， 还 剩 256 千克 ， 售出 了 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22676", "content": "小朋友 排队 做操 ， 小 刚 的 前面 有 3 人 ， 后面 有 5 人 ， 这 一队 一共 有 多少 人 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1546", "content": "37 + 39 + 53 + 63 的 简便 算法 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3825", "content": "一 本书 ， 小 红 看 了 4 天 ， 每天 看 120 页 ， 还 剩 56 页 没有 看 完 ， 这 本书 共有 多少 页 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18726", "content": "(5/9) 与 10 的 积 再 加上 0.5 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18870", "content": "学校食堂 运进 大米 120 包 ， 比 面粉 多 50 包 ， 运回 大米 和 面粉 共 多少 包 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1571", "content": "一 件 上衣 标价 240 元 ， “ 5 一 ” 节 商店 举行 促销 活动 ， 所有 服装 降价 (1/8) 出售 ． 这件 上衣 的 实际 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10902", "content": "两 汽车 从 相距 539 千米 的 两地 同时 相对 开出 ， 甲 车 每 小时 行 88.5 千米 ， 乙 车 每 小时 行 65.5 千米 ， 经 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7041", "content": "一 条 绳子 长 26.2 米 ， 第一次 用 去 7.6 米 ， 第 二 次 用 去 3.8 米 ， 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21861", "content": "动物园 的 大象 馆 和 猩猩 馆 之间 有 一条 105 米 长 的 小路 ， 工人 们 在 这 条 小路 的 一旁 安 路灯 ， 每 10.5 米 安装 一盏 ， 需要 准备 多少 盏灯 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14814", "content": "农机厂 计划 生产 1200 台 农机 ， 工人 们 平均 每天 生产 38 台 ， 生产 25 天 ， 还 剩 多少 台 没有 完成 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18338", "content": "公共汽车 上 原来 有 65 人 ， 在 区政府 下去 24 人 后 又 上 了 28 人 ， 现在 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7947", "content": "科技 书 800 本 ， 是 故事书 的 (4/7) ． 故事书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "884", "content": "小 明 正在 读 一本 科普 书 ， 第一周 读 了 120 页 ， 还 剩下 这 本书 的 (1/3) 没有 读 ． 这本 科普 书 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "564", "content": "一 个 食堂 每月 计划 烧煤 8400 千克 ， 改进 煤 灶 后 每天 可以 节约 用 煤 40 千克 ， 照 这样 计算 ， 原 计划 每月 的 烧煤 量 可以 烧 几天 ？ （ 一个月 按 30 天 计算 ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19001", "content": "货车 每 小时 行驶 80 千米 ， 轿车 每 小时 比 货车 多 行驶 (1/4) 路程 ． 轿车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15350", "content": "要 修 一条 铁路 ， 已经 修好 了 95.8 千米 ， 还 剩下 65.18 米 ． 这 条 铁路 长 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3476", "content": "(2005/2006) - (1/2006) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2937", "content": "学校 买 了 8 个 篮球 ， 每个 32 元 ， 一 共用 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20989", "content": "王 叔叔 从 江永县 县城 乘车 去 省城 长沙 办事 ， 公路 全程 462 千米 ， 刚好 7 小时 走 完全 程 ． 则 他 所 乘 的 车 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19759", "content": "a 、 b 两地 相距 440 千米 ， 甲 、 乙 两辆 汽车 同时 从 两地 相对 开出 ， 甲 车 每 时 行 60 千米 ， 乙 车 每 时 行 50 千米 ， 两车 开出 几时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8858", "content": "一 种 衣服 原价 每件 50 元 ， 现在 打 0.9 出售 ， 现在 每件 的 售价 比 原来 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13960", "content": "两只 船 在 江面 相遇 后 ， 一只 货船 以 每 时 25 千米 的 航速 开往 上游 的 港口 a ， 另一只 客船 开往 下游 的 港口 b ． 经过 18 时 ， 两 船 同时 到达 它们 的 目的地 ． 港口 a 与 b 之间 的 航程 为 954 千米 ， 客船 的 航速 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2714", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 以 42.5 千米 的 速度 行 了 1.4 小时 ， 这时 距 终点 还有 26 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6338", "content": "一 个数 的 (2/7) 是 (3/4) ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7720", "content": "小 明 家 离 学校 大约 2520 米 ． 放学 后 他 离校 回家 ， 同时 他 爸爸 从 家 骑 自行车 来 接 小 明 ， 12 分钟 后 两 人 相遇 ． 已知 小 明 和 爸爸 速度 之 比 是 2 ： 5 ． 小 明 每 分 种 的 走 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9216", "content": "李师傅 平均 每天 加工 10 个 零件 ， 一个月 工作 22 天 能 加工 多少 零件 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14419", "content": "同学 们 排队 做操 ， 小 英 前面 有 9 人 ， 后面 有 4 人 ， 这 一队 共有 多少 人 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10189", "content": "春 牙 鸡场 星期一 收 的 鸡蛋 ， 如 每 果 24 千克 装 一箱 ， 装满 30 箱 还 缺 15 千克 ． 鸡场 星期一 收 了 多少 千克 的 鸡蛋 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9573", "content": "一 个 盛 有 水 的 圆柱体 形容 器 ， 底面 内 半径 为 5 厘米 ， 深 20 厘米 ， 水深 15 厘米 ． 现 将 一个 底面 半径 为 2 厘米 ， 高 为 1.8 厘米 的 圆柱体 垂直 放入 容器 中 ， 求 这时 的 水深 = 多少 厘米 ？", "knowledge": ["*", "+", "/", "^"], "difficulty": 0.6, "length": 15}
-{"question_id": "16756", "content": "铁路 列车 提速 后 ， 一列 客车 从 甲地 到 乙地 所用 时间 是 18 小时 ， 比 提速 前 时间 少 用 25% ， 这 列 客车 提速 前 从 甲地 到 乙地 用 多长时间 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17944", "content": "甲 、 乙 两 工程队 修 一条 长 9800 米 的 路 ， 甲队 先 修 了 4 天 ， 每天 修 650 米 ， 剩下 的 由 甲 、 乙 两队 合作 ， 乙 队 每天 可 修 550 米 ， 那么 修 完 这 条 路 共 需 几天 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21962", "content": "一 批 煤 ， 先 用 8 辆 大卡车 运 ， 每辆 运 15 吨 ； 剩下 的 改用 5 辆 小 卡车 运 ， 每辆 小 卡车 的 装载量 只有 大卡车 的 (1/5) ， 恰好 一次 运 完 ． 这 批 煤 共 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "10397", "content": "笑笑 看 一本 240 页 的 书 ， 看 了 4 天 ， 平均 每天 看 35 页 ， 再 看 多少 页 可以 看 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15199", "content": "小 玲 的 打字速度 是 每分钟 7 个 ， 比 小 明 每分钟 多 打字 2 个 ， 小 明 4 分钟 能 打字 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1073", "content": "用 50 元 购买 学习用品 ， 买 了 8 支 单价 3.6 元 的 活动 铅笔 ， 又 买 了 12 本 相同 的 笔记本 后 ， 找回 了 6.8 元 ， 每 本 笔记本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5171", "content": "甲 、 乙 两地 相距 294 千米 ， 一辆 客车 和 一辆 货车 先后 从 两地 出发 ， 相向 而 行 ． 货车 先 开出 0.5 小时 后 客车 开出 ， 已知 货车 每 小时 行 60 千米 ， 客车 的 速度 是 货车 的 1.2 倍 ． 客车 开出 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16761", "content": "有 两种 同样 尺寸 的 盘子 ， 甲种 每个 4.8 元 ， 乙种 每个 5.2 元 ． 妈妈 要 买 两种 盘子 各 4 个 ， 一共 要 付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3382", "content": "甲 、 乙 两 数 的 平均数 是 70 ， 甲 、 乙 两 数 的 比 是 2 ： 5 ． 甲 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7095", "content": "小 明 从 家 到 学校 ， 每分钟 走 75 米 ， 20 分钟 到达 学校 ． 如果 想 提前 5 分钟 到校 ， 平均 每分钟 要 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "995", "content": "一 个数 除以 8 ， 商 是 324 ， 余数 是 5 ． 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18934", "content": "刘 叔叔 带 800 元 买 化肥 ， 买 了 18 袋 ， 还 剩 80 元 ． 每 袋 化肥 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7662", "content": "王师傅 将 一根 长 (4/5) 米 的 钢材 截 了 7 次 ， 截 成 长度 相等 的 小 段 ． 你 知道 每 一小 段 的 长度 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3363", "content": "567 * 142 + 426 * 811 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14392", "content": "某 商店 运 来 1800 千克 苹果 ， 第一天 卖掉 总数 的 (2/9) ， 第 二 天 卖掉 350 千克 ， 第 3 天 又 卖掉 总数 的 20% ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "22050", "content": "一 个数 是 21 的 7 倍 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "977", "content": "洗衣机 厂 计划 25 天 生产 1200 台 洗衣机 ， 实际 提前 5 天 就 完成 了 任务 ， 实际 每天 完成 了 这项 任务 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9981", "content": "某 公司 举行 迎新春 茶话会 ， 买来 5 箱 同样 重 的 苹果 ， 从 每箱 中 取出 20.4 千克 后 ， 各箱 所 剩下 的 苹果 质量 的 和 正好 等于 2 箱 苹果 的 质量 ， 那么 原来 每箱 苹果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6705", "content": "超市 上午 卖出 125 箱 牛奶 ， 下午 又 卖出 72 箱 ． 如果 每箱 牛奶 卖 48 元 ， 牛奶 共 卖 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19318", "content": "食堂 里 有 一批 煤 ， 用 去 一部分 后 还 剩 (2/9) ， 还 剩 (3/5) 吨 ， 食堂 原来 有 煤 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20183", "content": "李老师 骑车 从 家 到 学校 ， 每分钟 行 280 米 ， 12 分钟 到 学校 ， 李老师 家 离 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18470", "content": "张 雨 昨天 买 了 两本书 ． 一本 是 《 淘气包 马小跳 》 ， 单价 18 元 ， 一本 是 《 新 数学 故事 》 ， 单价 15.5 元 ． 他 付给 售货员 50 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18259", "content": "磁悬浮列车 运行 速度 可 达 400 千米 / 小时 ， 普通 列车 比 它 慢 (5/8) ， 普通 列车 的 速度 = 多少 千米 / 小时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5279", "content": "一 本 故事书 我 每天 读 15 页 ， 12 天 就 能 读完 ． 如果 6 天 读完 ， 每天 要 读 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23120", "content": "999 + 998 + 997 + 1000 + 1003 + 1002 + 1001 = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "16912", "content": "妈妈 在 菜场 买 了 2.5 千克 青菜 ， 付出 5 元 ， 找回 3 元 ， 每千克 青菜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9714", "content": "希望 小学 修 一条 200 米 的 跑道 ， 已经 修 了 160 米 ， 已经 修 的 是 没有 修 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16532", "content": "李 大爷 家种 了 5.7 亩 水稻 ， 共 收获 了 5700 斤 稻米 ， 平均 每亩 产量 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22647", "content": "明明 家 上 月 用电 150 千瓦时 ， 这个 月 比 上 月 节约 (1/6) ， 这个 月 用电 多少 千瓦时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17045", "content": "一 杯 盐水 共 400 克 ， 含盐 (3/10) ． 把 这 杯 盐水 倒 出 (3/4) ， 剩下 的 盐水 中 含盐 多少 克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16220", "content": "陈 生 有 邮票 126 张 ， 陈 生 比 饶 生 多 (1/5) ， 饶 生 有 多少 张 邮票 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18297", "content": "已知 一个 数 的 5 倍 是 65 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15957", "content": "司机 叔叔 从 云霄 出发 到 深圳 送货 ， 前 4 个 小时 ， 每 小时 行 80 千米 ， 后 2 小时 共 行 140 千米 ． 云霄 到 深圳 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1081", "content": "一 根 绳子 ， 剪 去 (1/2) 后 ， 短 了 5 米 ． 这根 绳子 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16323", "content": "妈妈 买来 一箱 桔子 ， 若 每天 比 计划 多 吃 一个 ， 则 比 计划 少 吃 2 天 ； 若 每天 比 计划 少 吃 一个 ， 则 计划 的 时间 过去 后 ， 还 剩 12 个 ， 那么 这 一箱 桔子 共 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1381", "content": "林场 今年 种树 618 棵 ， 比 去年 增加 3% ， 去年 种树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2787", "content": "电业局 工人 装 一批 电杆 ， 每天 装 24 根 ， 15 天 可以 完成 ． 如果 每天 多 装 12 根 ， 多少 天 可以 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7621", "content": "一 本书 看 了 60% ， 还 剩 480 页 ． 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4123", "content": "甲乙 两地 相距 630 千米 ， 客车 和 货车 从 两地 同时 开出 ， 相向 而 行 ， 3.5 小时 两车 相遇 ， 已知 客车 每 小时 行 96 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6590", "content": "小 红 年龄 比 小 玲 小 (2/3) ， 小 红 年龄 是 小 玲 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6100", "content": "在 献爱心 捐款 活动 中 ， 后 王 晁 小学 六年级 捐款 180 元 ， 比 五年级 少 捐 25% ， 五年级 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2426", "content": "有 6000 棵 树苗 平均 分给 6 个 年级 ， 每个 年级 有 5 个 班 ， 平均 每班 分 多少 棵 树苗 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12624", "content": "一 个 梯形 的 上 是 2 分 米 ， 下 底 是 6 分 米 ， 高 是 3.5 分 米 ， 它 的 面积 = 多少 平方分米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3347", "content": "菜场 运 来 白菜 (8/3) 吨 ， 运 来 黄瓜 是 白菜 的 (9/10) ， 运 来 的 萝卜 比 黄瓜 多 (1/6) ， 运 来 的 萝卜 比 黄瓜 多 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4830", "content": "一 段 布 长 (4/5) 米 ， 正好 是 另 一段 布 的 长度 的 (3/5) ， 另 一段 布 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14769", "content": "1300 - 900 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1079", "content": "用 弹簧秤 称 物体 ， 称 2 千克 的 物体 ， 弹簧 长 12.5 厘米 ； 称 6 千克 的 物体 ， 弹簧 长 13.5 厘米 ． 没有 称 物体 时 ， 弹簧 长 多少 厘米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20352", "content": "(3/4) 千克 小麦 可以 磨 面粉 (3/5) 千克 ， 照 这样 计算 ， (24/5) 千克 小麦 可 磨 面粉 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "155", "content": "32 * 124 - 86 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13053", "content": "一 本 故事书 162 页 ， 张 杨 今天 看 了 (1/6) ， 他 明天 从 第几页 开始 看 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11578", "content": "从 午夜 零时 到 中午 12 时 ， 时针 和 分针 共 重叠 多少 次 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19554", "content": "商店 运 来 2 箱 足球 ， 每箱 6 个 ， 这些 足球 的 总价 为 648 元 ． 平均 每个 足球 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19402", "content": "仓库 里 有 一批 化肥 ， 第一次 取出 总数 的 (2/5) ， 第 二 次 取出 总是 的 (1/3) 少 12 袋 ， 这时 仓库 里 还 剩 24 袋 ． 两袋 共 取出 多少 袋 ．", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11053", "content": "一 捆 电线 共 400 米 ， 第一次 用 去 总长 的 (2/5) ， 第 二 次 用 去 余下 的 30% ． 这时 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "13980", "content": "多少 / 40 = 6 … 28 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19056", "content": "某 大米 仓库 有 一批 大米 ， 第一次 运走 了 (1/3) ， 第 二 次 运走 了 420 吨 ， 这时 运走 的 和 剩下 的 大米 比 是 4 ： 1 ， 仓库 里 还有 多少 吨 大米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "2501", "content": "一 本 经典 读物 共有 540 页 ， 已经 看 了 180 页 ． 余下 的 平均 每天 看 18 页 ， 几天 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3657", "content": "6.05 加上 一个 数 得 10 ， 这个 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15605", "content": "一 个数 扩大 到 它 的 100 倍 后 ， 比 原 数多 202.95 ， 原 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7629", "content": "小 平 把 2000 元 钱 存入 银行 ， 定期 2 年 ， 年利率 是 3.25% ， 问 到期 后 她 可 拿到 本息 和 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22618", "content": "小 红 所 带 的 钱 ， 如果 买 一本 2.4 元 的 书 ， 可 剩下 2.1 元 ； 如果 改 买 2 支 圆珠笔 ， 可 剩下 1.3 元 ． 每支 圆珠笔 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6455", "content": "农具厂 要 生产 一批 农具 ， 计划 每天 生产 240 件 ， 10 天 完成 ． 实际 每天 生产 300 件 ， 实际 多少 天 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1230", "content": "6 一班 男生 占 全班 人数 的 (2/5) ， 这个 班 女生 人数 是 男生 人数 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6623", "content": "何 、 陈 两位 叔叔 身上 原有 钱 数 之 比 是 7 ： 5 ， 如果 何 叔叔 给 陈 叔叔 65 元 ， 那么 他们 的 钱 数 之 比 就 变为 3 ： 4 ． 问 原来 何 叔叔 有 多少 元 钱 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "16708", "content": "粮店 运 来 面粉 500 袋 ， 比 运 来 的 大米 少 20% ． 运 来 大米 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6769", "content": "小 丽 的 家 与 学校 相距 4 千米 ， 她 每天 用 (4/11) 小时 骑 自行车 到 学校 ， 小 丽 骑车 的 平均速度 时 每 小时 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14440", "content": "一 个 梯形 的 高 为 10 cm ， 这个 梯形 的 面积 为 150 cm ^ 2 ， 梯形 的 上 底 与 下 底 的 和 = 多少 cm ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14639", "content": "煤气公司 铺设 一条 2800 米 的 煤气管道 ， 第一周 铺 了 全长 的 30% ， 第 二 周 铺 了 全长 的 35% ， 还有 多少 米 没有 铺设 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11085", "content": "同学 们 用 长 30 米 的 彩带 做 花 ， 每 朵花 用 彩带 (2/5) 米 ， 拿走 一部分 后 ， 还 剩下 (2/3) ， 拿走 的 花 有 多少 朵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8740", "content": "一 个数 减去 4.4 与 5 的 积 ， 差 是 16 ， 求 这个 数 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "731", "content": "某 商场 为了 促销 ， 将 原价 900 元 的 大衣 打 0.6 出售 ， 这种 大衣 现在 每件 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11664", "content": "小 红 把 2000 元 存入 银行 ， 存期 一年 ， 年利率 为 2.68% ， 利息税 是 5% ， 那么 到期 时 可 得 利息 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10741", "content": "粮店 仓库 有 面粉 305 袋 ， 大米 袋 数 是 面粉袋 数 的 12 倍 ． 大米 有 多少 袋 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11065", "content": "有 4 根 木料 ， 每 根 都 锯 成 6 段 ， 每 锯开 一处 需 付 锯 板 费 2 元 ， 全部 锯 完 需 付 锯 板 费 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12450", "content": "桃 每千克 售价 1.8 元 ， 梨 每千克 售价 2.4 元 ． 买 40 千克 桃 的 钱 ， 可以 买 多少 千克 梨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20526", "content": "3 辆 卡车 5 次 运货 90 吨 ． 照 这样 计算 ， 这些 卡车 再 运 8 次 ， 一共 可以 运货 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17000", "content": "小熊猫 张 到 35 千克 时 ， 大熊猫 的 体重 比 小熊猫 的 2 倍 多 4 千克 ， 大熊猫 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16505", "content": "一 辆 汽车 从 甲地 开往 乙地 ， (4/5) 小时 行 了 60 千米 ， 照 这样 的 速度 行 完全 程 用 了 (8/3) 小时 ， 甲地 到 乙地 距离 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15883", "content": "一 辆 货车 从 陆良 往返 昆明 ， 去 时 重 车 的 速度 是 每 小时 36 千米 ， 行 了 5 小时 到达 昆明 ． 返回 时 空车 每 小时 行 45 千米 ． 这辆 货车 从 昆明 返回 陆良 需 多少 个 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22268", "content": "笑笑 对 淘气 说 ： “ 我们 班 人数 比 你们 班 多 20% ． ” 淘气 对 笑笑 说 “ 我们 班 比 你们 班 少 8 人 ． ” 笑笑 班 一共 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "887", "content": "五年级 有 故事书 400 本 ， 科技 书 的 本 数 是 故事书 的 (3/8) ， 文艺 书 的 本 数 是 科技 书 的 (4/5) ， 文艺 书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2533", "content": "甲 、 乙 两地 相距 240 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 2 小时 行 了 80 千米 ， 照 这样 计算 ， 行 完全 程 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4885", "content": "38.4 * 187 - 15.4 * 384 + 3.3 * 16 =", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14429", "content": "电视机厂 接到 一张 订货单 ， 叔叔 们 已经 生产 了 180 台 彩电 ， 剩下 的 每天 生产 135 台 ， 还要 生产 14 天 ， 这 张 订单 上 预订 了 多少 台 电视机 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4333", "content": "张 大伯 的 一块 农田 去年 种 普通 水稻 ， 产量 是 1200 千克 ． 今年 改 播 新品种 水稻 后 产量 达到 1440 千克 ， 比 去年 增产 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4592", "content": "在 相距 200 米 的 两个 凉亭 之间 栽树 ， 每隔 25 米 栽 一棵 ， 能 栽 几棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14652", "content": "食堂 运 来 600 千克 煤 ， 烧 了 8 天 ， 还 剩 120 千克 ， 平均 每天 烧煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4385", "content": "一 养 兔 专业户 要 出售 兔子 538 只 ． 上个月 出售 168 只 ， 本月 出售 228 只 ． 养 兔 专业户 还 剩 多少 只 兔 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10591", "content": "王师傅 要 加工 500 个 零件 ， 已经 加工 了 312 个 ， 剩下 的 如果 每天 加工 8 个 ， 还 需要 多少 天 能 加工 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22043", "content": "有 一堆 煤 ， 3 辆 卡车 8 次 可以 运 完 ． 如果 要 6 次 运 完 ， 需要 安排 几辆 这样 的 卡车 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5941", "content": "从 700 里 连续 减 多少 个 35 ， 结果 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8266", "content": "从 200 里面 连续 减 40 ， 减 多少 次 结果 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19212", "content": "甲乙 两站 相距 255 千米 ， 一列 客车 从 甲 站 开出 ， 一列 货车 从 乙 站 开出 ， 2.5 小时 后 相遇 ． 客车 每 小时 行 48 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18241", "content": "新华 小学 举行 春季 田径运动 会 ， 参赛 的 女 运动员 有 40 人 ， 正好 是 参赛 男 运动员 的 (5/6) ． 参加 这次 田径运动 会 的 男 、 女 运动员 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19754", "content": "美术组 有 24 人 ， 体育组 的 人数 是 美术组 的 4 倍 ， 两个 组 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14596", "content": "一 个 圆形 花坛 的 直径 是 2.2 米 ， 它 的 周长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7810", "content": "小 明 骑 电动车 去 少年宫 用 了 4 小时 ， 每 小 明 行 60 千米 ， 返回 时 只用 了 3 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9073", "content": "花园里 有 黄菊花 175 盆 ， 比 白菊花 少 38 盆 ， 花园里 有 菊花 多少 盆 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18783", "content": "一 个 正方形 边长 是 (9/10) 米 ， 它 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14722", "content": "学校 召开 “ 6 • 一 ” 庆祝会 ， 买来 一些 气球 ． 其中 红色 的 有 120 个 ， 黄色 气球 是 红色 的 (3/4) ， 同时 又 是 蓝色 的 (5/7) ． 学校 买来 蓝色 气球 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3672", "content": "一 个数 除以 8 ， 商 是 7 余数 是 5 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11379", "content": "水果店 有 300 千克 的 香蕉 和 一些 苹果 ； 当 香蕉 卖出 50% 、 苹果 卖出 (2/3) 时 ， 剩下 的 苹果 和 香蕉 同样 多 ． 原来 苹果 有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22046", "content": "兄弟俩 共有 银行存款 140 元 ， 其中 弟弟 占 (3/7) ， 后来 哥哥 又 存入 银行 一些 钱 ， 这时 弟弟 的 存款 占 两 人 存款 总数 的 37.5% ， 哥哥 又 存入 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "4460", "content": "新学期 开学 了 ， 张 杨 发现 ： 六年级 的 男生 比 上 学期 增加 了 10 人 ， 女生 人数 比 上 学期 减少 了 5% ， 年级 总 人数 比 上 学期 多 了 6 人 ． 上 学期 六年级 有 女生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22352", "content": "6 （ 1 ） 班 有 29 名 男同学 ， 21 名 女同学 ， 女同学 占 全班 人数 的 多少 %", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8857", "content": "某 修路 队 修 一条 长 144 米 的 公路 ， 上旬 修 了 全长 的 (1/3) ， 中旬 修 了 全长 的 (1/4) ， 下旬 修 了 40.5 千米 ， 还 剩 多少 千米 没有 修 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9980", "content": "学校 图书馆 有 文艺 书 136 本书 ， 科技 书 是 文艺 书 的 2 倍 ， 故事书 比 科技 书 的 3 倍 少 70 本 ， 故事书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14761", "content": "学校 运 来 10.8 立方米 的 沙 ， 把 这些 沙 铺 在 一个 长 5 米 ， 宽 3.6 米 的 沙坑 里 ， 可以 铺 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3817", "content": "一 条 公路 已 修好 了 405.65 千米 ， 比 没 修好 的 多 135.65 千米 ， 这 条 公路 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11871", "content": "印刷厂 装订 车间 原 计划 装订 5300 本书 ， 开始 7 天 装订 了 2100 本 ， 余下 的 书 每天 装订 400 本 ． 完成 任务 共用 了 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18288", "content": "粮店 运 来 40 袋 大米 ， 20 袋 面粉 ， 每 袋 都 是 25 千克 ， 运进 大米 和 面粉 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18901", "content": "比 一个 数 小 它 的 (3/5) 的 数 是 40 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21393", "content": "甲 、 乙 两艘 轮船 同时 从 a 地 开往 b 地 ． 甲 船 每 小时 行驶 35 千米 ， 乙 船 每 小时 行驶 28 千米 ． 经过 6 小时 ， 甲 船 比 乙 船 多行 了 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4387", "content": "小 明 今天 看书 90 页 ， 比 昨天 少 (4/9) ． 问 ： 小 明 昨天 看书 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5731", "content": "一 只 乌鸦 口渴 了 ， 它 发现 一个 瓶子 ， 瓶子 里 水 高 6 cm ， 乌鸦 喝 不到 水 ， 它 向 瓶子 里 放 了 几块 石子 后 ， 水 升高 了 原来 的 (1/2) ， 还是 喝 不到 水 ， 它 又 放 了 几块 石子 ， 这次 水 升高 的 高度 是 第一次 水 升高 的 高度 的 (2/3) ， 这时 乌鸦 高兴 地 喝 到 了 水 ， 你 知道 乌鸦 喝 到 水 时 ， 水 的 高度 比 原来 升高 了 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "7020", "content": "食品厂 加工 一种 蛋糕 ， 每个 蛋糕 需要 用 5.6 克 白色 奶油 和 2.5 克 彩色 奶油 ． 某 天 加工 的 这种 蛋糕 共用 了 彩色 奶油 120 克 ， 你 能 算 出 一 共用 了 多少 克 白色 奶油 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1440", "content": "有 一批 水果 ， 苹果 的 质量 是 2500 千克 ， 梨 是 苹果 的 (1/2) ， 桃 是 梨 的 (2/5) ， 桃 的 质量 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4803", "content": "小 明 有 42 张 邮票 ， 小 华 的 邮票 比 小 明 少 14 张 ． 小 明 和 小 华 一共 有 多少 张 邮票 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5874", "content": "小 红 家 到 学校 的 距离 是 720 米 ， 从 家 走路 去 上学 ， 走 了 8 分钟 后 ， 发现 离 学校 还有 200 米 ． 这 一天 小 红 上学 平均 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14248", "content": "把 30.856 平均 分成 14 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21502", "content": "已知 长方体 的 体积 是 72 立方分米 ， 它 的 底 面积 是 9 平方分米 ， 它 的 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2887", "content": "丽丽 到 书店 买 笔记本 ， 买 6.8 元 一本 的 ， 差 0.7 元 ， 她 只好 买 4.5 元 一本 的 ， 剩下 的 钱 正好 买 了 一枝 圆珠笔 ． 这 枝 圆珠笔 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1297", "content": "园林绿化 所有 37 棵 苹果树 ， 张 阿姨 每 30 天 给 苹果树 喷药 水 ， 喷 一棵 苹果树 要 花 5 分钟 ， 她 每次 要 花 多少 分钟 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15204", "content": "在 献爱心 捐款 活动 中 ， 光明 小学 四年级 捐款 180 元 ， 比 五年级 少 捐 10% ， 五年级 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3909", "content": "工程队 要 整修 一段 高速公路 ， 每天 修 52.8 米 ， 8 天 才能 完成 任务 的 一半 ， 余下 的 每天 要 修 105.6 米 才能 按时 完成 任务 ． 求 计划 几天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16623", "content": "机床厂 原来 知道 机床 每 台 用 钢材 1.02 吨 ， 改进 设计 后 ， 每 台 比 原来 节约 0.12 吨 ， 原来 制造 300 台 所用 的 钢材 ， 现在 可以 制造 机床 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4203", "content": "苏宁 商城 庆元旦 搞 活动 ． 原价 3500 元 的 某 品牌 电视 ， 现在 打 0.85 ， 比 原来 的 价格便宜 了 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2087", "content": "同学 们 在 春季 开展 爱鸟 活动 ， 计划 自己 动手做 100 个 鸟巢 ， 每个 用 木板 1.2 平方米 ， 在 完成 计划 的 (2/5) 后 ， 改进 了 制作方法 ， 每个 比 原来 节省 (1/12) 的 木料 ， 这 批 鸟巢 完工后 ， 一共 可以 节省 多少 木料 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10318", "content": "学校 体育 队 有 男同学 12 人 ， 女同学 13 人 ． 合唱队 的 人数 是 体育 队 的 4 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7401", "content": "某 汽车 制造厂 上半年 生产 小汽车 4800 辆 ， 下半年 比 上半年 增产 10% ， 问 该 汽车厂 这 一年 生产 小汽车 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1937", "content": "用 一根 竹竿 测 水深 ， 露出 水面 部分 长 120 厘米 ， 比 浸没 在 水中 部分 的 2 倍 少 20 厘米 ， 水深 多少 厘米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6979", "content": "光明 小学 上学 年 有 学生 500 人 ， 今年 的 学生 人数 比 上年 增加 了 10% ， 光明 小学 今年 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14054", "content": "法国巴黎 战神 广场 上 的 埃菲尔铁塔 总 高 约 324 米 ， 上海 的 东方明珠 电视塔 高 约 468 米 ， 东方明珠 电视塔 比 埃菲尔铁塔 高 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5008", "content": "光华 商场 去年 计划 完成 利润 650 万元 ， 实际 比 计划 增加 了 15% ． 实际 完成 利润 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12085", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 先 走 了 全程 的 (1/5) ， 又 走 了 全程 的 20% ， 此时 离 终点 还有 15 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17164", "content": "小 华 和 小强 的 体重 是 84 千克 ， 小 华 和 小 玲 的 体重 是 80 千克 ， 小强 和 小 玲 的 体重 是 82 千克 ， 小 华 比 小 玲 重 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6075", "content": "张师傅 计划 加工 一批 零件 ， 已经 加工 180 个 ， 还 剩 40% 没有 加工 ， 这 批 零件 一共 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18463", "content": "已知 乙 数 是 150 ， 乙 数 的 (3/5) 正好 等于 甲 数 的 75% ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12749", "content": "240 是 3 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5075", "content": "点点 暑假 练习 写字 ， 每天 写 3 页 ， 5 天 后 加快速度 又 写 了 全部 的 (1/5) ， 还 剩下 25 页 ， 点点 共 练习 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5127", "content": "一 只 青蛙 每天 吃 100 只 害虫 ， 比 一只 燕子 吃 的 3 倍 少 20 只 ， 一只 燕子 每天 吃 多少 只 害虫 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21085", "content": "1000 米 赛跑 ， 已知 甲 到达 终点 时 ， 乙 离 终点 50 米 ； 乙 到达 终点 时 ， 丙 离 终点 100 米 ， 那么 甲 到达 终点 时 ， 丙 离 终点 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "2073", "content": "菜市场 运 来 黄瓜 315 千克 ， 运 来 的 西红柿 是 黄瓜 的 4 倍 ， 西红柿 比 黄瓜 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11711", "content": "菜场 运 来 西红柿 300 千克 ， 运 来 的 黄瓜 重量 比 西红柿 少 15% ， 运 来 的 黄瓜 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14930", "content": "某种 品牌 自行车 现在 打 0.85 出售 ， 王 叔叔 买 一辆 自行车 ， 付 了 357 元 ． 原来 买 这辆 自行车 应付 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7324", "content": "建筑队 要 运 48 吨 水泥 到 工地 ， 已经 运 了 12 吨 ， 剩下 的 打算 分 9 次 运 完 ， 平均 每次 要 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18750", "content": "某 小学 六年级 有 120 人 参加 数学 竞赛 ， 获奖 人数 占 六年级 参加 数学 竞赛 总 人数 的 (3/10) ， 而 获奖 人数 的 (1/3) 是 女生 ． 获奖 的 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12507", "content": "东风 小学 六年级 学生 植树 150 棵 ， 五年级 比 六年级 植树 少 20% ， 五年级 植树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9068", "content": "一 块 地 有 (7/8) 公顷 ， 用 2 台 拖拉机 耕 ， (3/4) 小时 可以 耕 完 ． 平均 每 台 拖拉机 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9128", "content": "果园 里 种 了 34 棵 桃树 ， 种 的 梨树 是 桃树 的 8 倍 ， 种 的 梨树 和 桃树 一共 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1927", "content": "饲养场 有 2500 只 鸡 ， 第一次 卖出 总数 的 (3/5) ， 第 二 次 卖出 余下 的 (5/8) ， 还 剩下 多少 只 鸡 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15128", "content": "学校 买来 6 把 拖把 和 14 把 扫帚 ， 共 支付 了 215.4 元 ． 每 把 扫帚 7.5 元 ， 每 把 拖把 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3820", "content": "据 学校 兴趣小组 活动 的 人数 统计 ， 参加 科技 活动 的 同学 有 37 人 ， 比 参加 文艺活动 人数 的 2 倍 还 多 7 人 ． 参加 文艺活动 的 同学 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3041", "content": "快 过 春节 了 ， 小 红 的 妈妈 要 给 奶奶家 寄 5000 元 钱 ， 邮局 规定 要 按 汇款 的 1% 交汇 费 ， 那么 小 红 的 妈妈 要 交 的 汇费 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17549", "content": "向阳 小学 植树 200 棵 ， 比 计划 多 植 40 棵 ， 超过 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11126", "content": "环形 跑道 一 周长 400 米 ， 李 明 和 王 伟 从 同 一处 同时 起跑 ， 李 明 每 分 跑 300 米 ， 王 伟 每 分 跑 250 米 ， 多少 分钟 后 两 人 第 二 次 跑 在 同 一处 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22533", "content": "某校 合唱队 女生 人数 和 男生 人数 的 比 是 5 ： 3 ， 女生 比 男生 多 30 人 ， 合唱队 一共 有 学生 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11058", "content": "汽车 从 甲地 开往 乙地 ， 全程 360 千米 ， 开 了 4 小时 ． 平均 每 小时 开 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12391", "content": "王老师 带 700 元 去 卖书 ， 买 了 16 套书 ， 还 剩 60 元 ． 平均 每套 书 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19620", "content": "小 刚 步行 到 青山 去 旅游 ， 他 每 小时 行 6 千米 ， 3 小时 后 距离 青山 还有 8 千米 ． 小 刚 家 至 青山 的 路程 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11259", "content": "比 3.6 少 多少 的 数 是 2.87 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7072", "content": "一 个 长方体 水箱 ， 长 8 dm ， 宽 5 dm ， 水深 3 dm ， 当 把 一块 石块 放入 水箱 后 ， 水位 上升 了 2 dm ． 这块 石块 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17191", "content": "一 根 绳子 的 长度 等于 它 本身 长度 的 (3/5) + (2/5) 米 ， 这 绳子 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7112", "content": "学校 体育组 的 张老师 拿 800 元 钱 买 了 12 个 篮球 后 还 剩 20 元 钱 ， 每个 篮球 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16258", "content": "甲种 邮票 面值 (4/5) 元 ， 乙种 邮票 面值 (1/10) 元 ． 两种 邮票 各 买 20 张 ， 买 甲种 邮票 比 买 乙种 邮票 多付 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3955", "content": "爸爸 去年 每月 工资 1600 元 ， 今年 比 去年 月工资 增加 30% ， 今年 爸爸 月工资 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19088", "content": "水 结成 冰 后 ， 体积 增加 了 (1/11) ， 冰 融化 成 水 后 ， 体积 减少 了 多少 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "748", "content": "一 个 建筑队 铺 一条 铁路 ， 原 计划 每天 铺 32 千米 ， 5 天 铺 完 ． 现在 实际 每天 铺路 40 千米 ， 可以 提前 几天 铺 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20312", "content": "阿坝 镇 去年 实际 造林 比 原 计划 增加 (1/5) ， 实际 比 原 计划 多 造林 120 公顷 ， 原 计划 造林 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13946", "content": "一 个 筑路 队 修 一条 公路 ， 第一次 修筑 了 全长 的 (2/5) ， 第 二 次 修 了 20 千米 ， 这时 还 剩 全长 的 20% 没 修 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7869", "content": "小 红 看 一本 科技 书 ， 看 了 3 天 ， 剩下 121 页 ． 如果 用 这样 的 速度 看 4 天 ， 就 剩下 全书 的 (2/5) ， 则 这 本书 一共 有 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1408", "content": "一 列 高速 动车组 从 武汉 开往 广州 ， 前 一个半 小时 约 行 了 全程 的 (4/9) ， 这时 离 广州 的 路程 占 全程 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8406", "content": "王 强 和 李 军 在 一个 300 米 的 环形 跑道 上 同时 从 起跑线 上 起跑 ， 王 强 每秒 跑 6 米 ， 李 军 每秒 跑 4 米 ． 问 几秒 后 王 强 第一次 追 上 李 军 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10601", "content": "某班 学生 搬 椅子 ， 如果 每人 搬 2 张 ， 就 剩下 8 张 没 人 搬 ， 如果 每人 搬 3 张 就 少 40 张 ． 这个 班 共有 学生 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1510", "content": "客车 和 货车 从 甲乙 两地 同时 出发 ， 相向 而 行 ， 客车 每 小时 行 65 千米 ， 货车 每 小时 行 55 千米 ， 经过 8 小时 相遇 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18164", "content": "玩具厂 要 生产 一批 玩具 ， 计划 每天 生产 660 件 ， 12 天 完成 ， 现在 要 11 天 完成 ， 每天 要 多 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13633", "content": "学校 有 6 个 年级 ， 每个 年级 有 4 个 班 ． 学校 有 1200 人 ， 正好 坐满 ． 平均 每班 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5728", "content": "用 0 、 1 、 2 、 3 、 4 、 5 6 个 数字 ， 能 组成 多少 个 没有 重复 数字 的 3 位数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19735", "content": "甲 、 乙 二 人 分别 以 3 米 每秒 和 2 米 每秒 速度 在 300 米 的 环形 跑道 上 从 同 一点 反向 出发 ， 当 他们 第 5 次 相遇 时 ， 甲 一共 跑 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13896", "content": "一 个 等腰三角 形 的 底 是 5 米 ， 腰 是 8 米 ， 周长 = 多少 米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14384", "content": "一 辆 摩托车 5 分钟 行驶 了 4 千米 ， 这辆 摩托车 行驶 1 千米 需 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12717", "content": "水果店 运 来 苹果 和 梨 各 140 箱 ， 每箱 苹果 重 25 千克 ， 每箱 梨 重 32 千克 ． 水果店 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "431", "content": "某 水果店 上星期 的 前 3 天 一共 买 出 水果 38 箱 ， 后 4 天 平均 每天 买 出 水果 15 箱 ， 这个 星期 平均 每天 买 出 水果 多少 箱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16045", "content": "修路 队 修 一条 路 ， 第一周 修 了 2.5 千米 ， 第 二 周 修 了 2 千米 ， 还 剩下 (4/9) 没有 修 ， 这 条 路 长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19463", "content": "一 列 特快 列车 4 小时 行使 640 千米 ， 它 的 速度 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2150", "content": "一 列 火车 4 小时 行 512 千米 ， 一辆 汽车 5 小时 行 320 千米 ， 火车 的 速度 是 汽车 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20893", "content": "小 刚 今年 10 岁 ， 爸爸 今年 36 岁 ， 当 爸爸 50 岁 时 ， 小 刚 的 年龄 = 多少岁 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "819", "content": "一 个 重 (4/5) 千克 的 菠萝 ， 平均 分成 6 份 ， 每份 = 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11986", "content": "一 本 故事书 ， 王 东 10 天 可以 看 完 ， 而 王 红 要 比 王 东 多 4 天 看 完 ， 王 东 每天 比 王 红 多 看 12 页 ， 那么 这本 故事书 共有 多少 页 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20171", "content": "王师傅 8 小时 生产 648 个 零件 ， 李师傅 4 小时 生产 72 个 零件 ． 王师傅 平均 每 小时 比 李师傅 多 生产 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13683", "content": "甲 、 乙 两个 工程队 合 修 一段路 ， 甲队 每天 修 55.02 米 ， 是 乙 队 每天 修 的 1.5 倍 ． 甲 、 乙 两队 每天 共 修路 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13519", "content": "多少 米 的 (5/6) 比 94 米 多 31 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3717", "content": "甲乙 两地 相距 840 千米 ， 汽车 每 时 行 56 千米 ， 15 小时 后 ， 距 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18099", "content": "有 两袋 大米 ， 甲 袋 大米 重 96 kg ， 从 甲 袋 里 取出 它 的 (1/3) ， 这时 甲 袋 余下 的 大米 是 乙 袋 大米 的 (4/5) ． 乙 袋 有 大米 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2681", "content": "学校 买 回 6 梱 书 ， 每 梱 40 本 ， 把 这些 平均 分给 8 个 班 ， 每个 班 可 分 图书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5699", "content": "为了 庆祝 元旦 举行 文艺 汇演 ， 做 了 36 套 合唱 服 和 12 套 舞蹈 服 ． 如果 平均 每套 用 布料 1.8 米 ， 一共 需要 布料 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5073", "content": "王 叔叔 上 月 的 工资总额 为 2880 元 ， 按照 规定 超过 2000 元 的 部分 要 缴纳 5% 的 个人所得税 ， 王 叔叔 上个月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9262", "content": "一 件 衣服 0.6 出售 后 ， 便宜 了 200 元 ， 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12732", "content": "男生 和 女生 手拉手 排成 一行 ， 每 两个 男生 之间 都 有 一个 女生 ． 如果 男生 有 10 人 ， 女生 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8336", "content": "工厂 要 生产 100 节 长 8 米 ， 直径 0.6 米 的 圆柱形 通风管 ， 需要 多少 平方米 铁皮 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "8680", "content": "兵 兵 4 天 看 了 一本 故事书 的 (3/7) ， 他 每天 看 这 本书 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22204", "content": "一 艘 轮船 从 甲 港 开往 乙 港 ， 每 小时 行 25 千米 ， 4.5 小时 到达 ， 从 乙 港 返回 甲 港 时 用 了 5 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "191", "content": "机械厂 过去 每班 生产 零件 2000 个 ， 现在 每班 比 过去 多 生产 580 个 ， 现在 每班 生产 的 零件 是 过去 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11549", "content": "一 根 绳 长 12 米 ， 第一次 用 去 5 米 ， 第 二 次 用 去 4 米 ， 这时 绳子 比 原来 短 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13362", "content": "某班 有 男生 15 人 ， 女生 27 人 ， 男生 占 女生 总 人数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8154", "content": "一 个 旅游团 到 某 饭店 用餐 ． 如果 每人 收 16 元 ， 付 用 餐费 还 差 4 元 ． 如果 每人 收 19 元 ， 付 用 餐费 加 15% 的 旅途 点心费 后 ， 还 剩 2 元 ． 那么 ， 这个 旅行团 共有 多少 人 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16507", "content": "放 国庆 大 假 ， 王老师 送 招 点 学生 乘 卧铺车 ， 卧铺车 1 小时 约 行 56 千米 ， 行驶 8 小时 可 到达 ， 王老师 乘车 行驶 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16954", "content": "两件 上衣 进价 都 是 250 元 ， 一件 盈利 25% ， 另 一件 赔本 15% ， 卖 这 两件 上衣 赚 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13548", "content": "书架上 有 95 本书 ， 小林 拿走 一些 后 ， 书架上 还有 68 本 ． 拿走 了 多少 本 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18503", "content": "一 件 “ 鹿 王 ” 羊绒衫 原价 630 元 ， 现在 商场 打 0.6 销售 ， 这件 羊绒衫 现在 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19705", "content": "挖 一条 1800 米 的 水渠 ， 前 2 天 挖 了 600 米 ， 剩下 的 还 需 几天 挖 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18652", "content": "一 位 工人 把 一根 木头 锯 成 5 段 用 7 分钟 ， 照 这样 的 速度 把 这根 木头 锯 成 9 段 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5898", "content": "小 光 买 了 一个 价格 是 2.3 元 的 卷 笔 到 刀 ， 付 了 5 元 钱 ， 应 找回 多少 元 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17544", "content": "一 个 车间 要 生产 一批 零件 ． 平均 每天 要 生产 60 个 ， 5 天 后 还 剩下 350 个 没有 生产 ． 这 批 零件 共 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5509", "content": "80 的 12% + 1.25 / 0.75 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6887", "content": "一 个 水泥厂 下半年 生产 水泥 36 万吨 ， 上半年 比 下半年 少 生产 (1/18) ， 上半年 生产 水泥 多少 万吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11404", "content": "一 堆 煤 用 去 (3/5) ， 还 剩下 12 吨 ， 这 堆 煤 原来 有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20793", "content": "学校 举行 朗读比赛 ， 规定 朗读 时间 为 4 分钟 ． 东东 每分钟 读 117 个 字 ， 他 的 稿子 共 520 个 字 ， 他 最少 要 删掉 多少 个 字 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18090", "content": "一 桶 水 打出 6 杯 后 ， 还 剩 70 克 ， 如果 这个 桶 可以 装 1150 克 水 ， 求 每 杯水 有 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4947", "content": "商店 运 来 一批 水果 ， 卖出 的 是 剩下 的 (2/5) ， 水果 共有 350 千克 ， 还 剩下 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9013", "content": "食堂 运 来 大米 500 千克 ， 运 来 面粉 是 大米 的 (4/5) ， 运 来 的 蔬菜 是 面粉 的 (3/8) ， 运 来 蔬菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3067", "content": "修 一条 路 ， 已经 修 了 它 的 40% ， 还 剩 3 千米 ， 这 条 路 共有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13530", "content": "修路 队 计划 修路 1500 米 ， 已经 修 了 4 天 ， 每天 修 350 米 ， 还有 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2567", "content": "把 4 米 长 的 绳子 按 每 段 (1/2) 米 长 ， 共 可 截 成 多少 段 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "53", "content": "1993 + 1994 + 1995 + 1996 + 1997 + 1998 + 1999 + 2000 = ．", "knowledge": ["+"], "difficulty": 0.6, "length": 15}
-{"question_id": "1414", "content": "一 个数 除以 6 ， 商 是 123 ， 余数 是 3 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13782", "content": "小 明 准备 用 140 元 零花钱 给 希望 小学 的 同学 买 学习用品 ， 如果 全部 买 a 种 钢笔 可以 购买 10 枝 ． 如果 买 b 种 钢笔 ， 每枝 就要 贵 6 元 ． 这笔 钱 可以 买 几枝 b 种 钢笔 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5672", "content": "2 个 生产组 在 6 天 里 一共 生产 了 1440 个 零件 ， 求 每个 小组 每天 生产 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16427", "content": "王老师 每月 工资 1200 元 ， 超过 800 元 的 部分 需 缴 5% 的 个人所得税 ， 王老师 每月 实际 获得 工资 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19502", "content": "一 台 洗衣机 的 价格 是 816 元 ， 某 商场 有 一天 上午 卖出 18 台 ， 下午 卖出 27 台 ， 这个 商场 这 一天 的 营业额 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19925", "content": "妈妈 以 0.9 优惠 的 价格 购买 了 一台 电冰箱 ， 花 了 1350 元 ， 这 台 电冰箱 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6380", "content": "甲 、 乙 两 人 步行 的 速度 之 比 是 13 ： 11 ， 如果 甲 、 乙 分别 从 ab 两地 同时 出发 ， 相向 而 行 ， 2.5 小时 相遇 ， 如果 他们 同 向 而 行 ， 那么 甲 追 上 乙 需要 多少 小时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6929", "content": "师徒 两 人 合 做 一批 零件 ， 完工 时 师傅 完成 这 批 零件 的 (5/8) ， 师傅 比 徒弟 多 做 了 这 批 零件 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2753", "content": "做 一批 玩具 ， 计划 每天 做 160 个 ， 要 35 天 完成 ． 实际 每天 做 200 个 ， 实际 比 计划 少 用 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7620", "content": "用 分数 表示 ： 4 / 5 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20318", "content": "某 小学 一年级 有 240 人 ， 比 六年级 人数 的 2 倍 少 80 人 ， 六年级 有 几个 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7714", "content": "一 辆 汽车 3 小时 行驶 135 千米 ， 照 这样 计算 ， 要 行驶 405 千米 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17093", "content": "参加 某次 数学 竞赛 的 女生 和 男生 人数 比 是 1 ： 3 ， 这次 竞赛 的 平均分 是 82 分 ， 其中 男生 平均分 是 80 分 ， 女生 平均 多少 分 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12170", "content": "一 根 彩带 用 去 了 (5/6) 米 ， 还 剩下 (3/4) 米 ， 这根 彩带 原来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16440", "content": "一 部 电话机 210 元 ， 一台 录音机 208 元 ， 王 叔叔 用 500 元 买 这 两样 物品 ， 还 剩 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17406", "content": "一 次 数学 测验 ， 全班 平均分 是 91.2 分 ， 已知 女生 有 21 人 ， 平均 每人 92 分 ， 男生 平均 每人 90.5 分 ． 求 这个 班 男生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9246", "content": "一 本 240 的 故事书 ， 小 明 第一天 看来 全书 的 25% ， 第 二 天 应该 从 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6609", "content": "工地 有 黄沙 85 吨 ， 比 水泥 吨数 的 (3/4) 多 25 吨 ． 工地 有 水泥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9569", "content": "店 1 - 6 月份 共 卖出 彩色 电视机 258 台 ， 平均 每个 月 卖出 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "168", "content": "多少 / 8 = 402 … 6 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6660", "content": "4 本 《 大唐 全传 》 共 51.2 元 ， 每 本 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14409", "content": "食堂 原有 煤 5.25 吨 ， 用 去 3.92 吨 后 ， 又 运 来 4.6 吨 ， 食堂 现在 有 煤 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16639", "content": "一 个数 的 (2/3) 是 80 ， 这个 数 的 (1/10) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1429", "content": "南京博物院 里面 的 民国 馆 每天 可以 接待 1000 人 ， 是 数字 管 接待 人数 的 (10/3) ， 数字 馆 每天 接待 的 人数 = 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16086", "content": "在 10 件产品 有 6 件 正品 ， 4 件 次品 ， 任意 抽取 1 件 是 次品 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11744", "content": "车间 要 加工 760 个 零件 ， 第一周 工作 5 天 ， 每天 加工 80 个 ． 第 二 周 准备 每天 加工 90 个 ， 还要 几天 才能 完成 加工 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2090", "content": "一 个数 除 56 得 8 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18601", "content": "王 钢 把 20000 元 人民币 存入 银行 ， 定期 3 年 ， 年利率 是 2.7% ． 到期 时 ， 王 钢 应得 本金 和 税后 利息 利息 一共 多少 元 ？ （ 利息 税率 为 5% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16411", "content": "除数 和 商都 是 15 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5393", "content": "学校 艺术节 上 ， 老师 参展 的 绘画 作品 有 68 件 ， 学生 参展 作品 数 是 老师 的 19 倍 ． 本次 艺术节 上 师生 参展 的 作品 共有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18097", "content": "一 套 家具 原价 5000 元 ， 现 0.8 出售 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8279", "content": "篮子 里 有 10 个 红萝卜 ， 小 灰 兔 吃 了 其中 的 一半 ， 小白兔 吃 了 2 个 ， 还 剩下 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2825", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 25% ， 第 二 天 修 了 全长 的 30% ， 还 剩下 900 米 没 修 ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10578", "content": "12 个 班 的 学生 去 春游 ， 平均 每班 45 人 ． 一共 有 10 辆 大客车 ， 平均 每辆 坐 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6401", "content": "计算 ： 1997 + 1996 + 1004 + 1006 + 1994 + 1003 = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "18189", "content": "菜 站 运 来 1.2 吨 黄瓜 ， 运 来 的 土豆 是 黄瓜 的 1.5 倍 ， 运 来 土豆 和 黄瓜 一共 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21644", "content": "一 个数 减去 327 得 185 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "705", "content": "一 幢 楼 有 5 层 ， 每层 有 6 户 居民 ， 如果 平均 每户 节约用电 1.3 度 ， 这幢 楼 每月 共 节约用电 多少度 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8353", "content": "学校 举行 春季 运动会 ， 六年级 有 56 名 同学 参加 ． 其中 有 (3/7) 是 女 运动员 ． 参加 运动会 的 男 运动员 有 多少 名 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13756", "content": "书店 在 促销 活动 中 ， 推出 一种 优惠卡 ， 每张 卡 售价 20 元 ， 凭 卡 可 享受 0.8 优惠 ， 有 一次 ， 李 明 同学 到 该 书店 购书 ， 结账 时 ， 他 先买 了 优惠卡 ， 结果 节省 了 12 元 ， 那么 李 明 同学 此次 购书 时 所付 的 现金 = 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14456", "content": "小张 的 身高 是 1.81 米 ， 小 王 比 小张 矮 0.08 米 ． 小 王 的 身高 = 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4348", "content": "一 块 巧克力 ， 小 红 吃 了 (3/8) ， 小 明 吃 了 (2/8) ， 两 人 一共 吃 了 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7906", "content": "250 - 50 * 3 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16585", "content": "王老师 家 书房 的 面积 是 8 平方米 ， 铺 地面 正好 用 了 32 块 地砖 ． 他家 客厅 的 面积 是 24 平方米 ， 铺 客厅 要 用 多少 块 地砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17682", "content": "某 鞋店 进来 皮鞋 600 双 ， 运进 的 运动鞋 比 皮鞋 多 (1/5) ， 运动鞋 比 皮鞋 多 多少 双 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9385", "content": "大车 每次 运货 1.3 吨 ， 小车 每次 运 1.2 吨 ， 运 多少 次 后 大车 比 小车 多 运 2.4 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3828", "content": "市场 鸡蛋 按 个数 计价 ， 一 商贩 以 每个 0.24 元 购进 一批 鸡蛋 ， 但 在 贩运 途中 ， 不慎 碰坏 了 12 个 ， 剩下 的 蛋 以 每个 0.28 元 售出 ， 结果 获利 11.2 元 ， 问 商贩 当初 买进 多少 鸡蛋 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6400", "content": "育 红 小学 为民 助残 小组 由 原来 的 5 个 增加 到 16 个 ， 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5517", "content": "从 一个 长 10 厘米 、 宽 8 厘米 、 高 5 厘米 的 长方体 中 截 出 一个 体积 最大 的 正方体 ． 这个 正方体 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16878", "content": "车站 有 一批 货物 ， 第一天 运走 全部 货物 的 (1/3) 多 20 吨 ， 第 二 天 运走 全部 货物 的 (1/2) 少 25 吨 ， 这时 车站 还 存 货物 37 吨 ， 这 批 货物 一共 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13345", "content": "希望 小学 三年级 有 男生 24 人 、 女生 19 人 ． 全校 人数 是 三年级 的 6 倍 ， 希望 小学 全校 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13574", "content": "小苗 看 一本 105 页 的 连环画 ， 第一天 看 10 页 ， 第 二 天 看 的 页数 是 第一天 的 2 倍 ， 第 3 天 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9656", "content": "税法 规定 ， 每月 个人 收 人 超过 800 元 的 部分 要 征收 “ 个 调 税 ” ， 超过 部分 不满 500 元 的 按 5% 的 税率 征收 ． 李 叔 权 十一 月份 收 人 1200 元 ， 应 缴纳 个 调 税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4618", "content": "一 个数 的 5 倍 是 620 ． 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3771", "content": "甲 、 乙 两辆 汽车 分别 从 a 、 b 两城 同时 相对 开出 ， 甲 车行 完全 程 的 (5/9) 时 ， 与 乙 车 相遇 ． 相遇 后 乙 车 继续 以 每 小时 60 千米 的 速度 前进 ， 用 1.5 小时 行 完 余下 的 路程 ． a 、 b 两城 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12553", "content": "副食店 运 来 410 千克 鸡蛋 ， 上午 卖出 152 千克 ， 下午 卖出 147 千克 ， 还 剩 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11600", "content": "加工 一批 零件 ， 甲 先 加工 了 这 批 零件 的 (2/5) ， 接着 乙 加工 了 余下 的 (4/9) ． 已知 乙 加工 的 个数 比 甲 少 200 个 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22460", "content": "水果店 有 苹果 1800 千克 ， 卖出 它 的 (1/5) 后 ， 剩下 苹果 的 重量 是 梨 重量 的 60% ， 水果店 有 梨 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17895", "content": "果园 里 有 梨树 200 棵 ， 苹果树 棵 数 的 (2/5) 与 梨 相等 ， 果园 里 有 梨树 和 苹果树 共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11139", "content": "经济 开发区 学校 一年级 有 学生 400 人 ， 二年级 比 一年级 的 (15/16) 少 15 人 ， 求 二年级 有 学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20656", "content": "商店 上午 卖出 皮鞋 18 双 ， 下午 卖出 皮鞋 23 双 ， 下午 比 上午 多 收入 425 元 ， 每 双 皮鞋 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21339", "content": "有 一堆 3 立方米 的 沙土 ， 要 铺 在 长 6 米 ， 宽 2 米 的 跑道 上 ， 可以 铺 多 厚 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14098", "content": "一 个数 加上 (9/2) 等于 10 ， 这个 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "753", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 速度 为 每 小时 40 千米 ， 回来 时 速度 提高 (1/4) ， 结果 只用 了 2 小时 就 回到 甲地 ． 甲 、 乙 两地 的 距离 = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4417", "content": "学校 买来 排球 40 个 ， 比 买来 的 篮球 多 (3/5) ． 学校 买来 的 篮球 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1711", "content": "鸭 有 18 只 ， 鸡 的 只 数 比 鸭 的 3 倍 少 4 只 ， 鸡 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1916", "content": "江城 家电 在 店 庆 那 一天 ， 将 某 冰箱 按 进价 提高 35% ， 然后 又 以 “ 0.9 酬宾 ， 外 送 50 元 运费 ” 进行 促销 ， 结果 每 台 冰箱 仍然 获利 208 元 ， 这种 冰箱 的 进价 = 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6656", "content": "一 台 洗衣机 售价 580 元 ， 一台 彩色 电视机 售价 2400 元 ， 一台 洗衣机 机 售价 是 一台 彩色电视 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5505", "content": "一 个数 的 3 倍 与 它 的 6.5 倍 的 和 是 2.85 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21773", "content": "计算 1.25 * 3.9 * 2.1 / （ 3.5 * 2.5 * 0.39 ） ， 结果 = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11343", "content": "妈妈 从 伊春 乘火车 去 某 城市 用 了 12 小时 ， 火车 每 小时 行 145 千米 ， 伊春 到 这 座 城市 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7578", "content": "一 本 故事书 ， 每天 看 8 页 ， 6 天 看 了 这 本书 的 (3/4) ． 这本 故事书 有 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2524", "content": "爸爸 用 两条 长度 分别 是 1.27 米 、 1.35 米 的 绳子 接 起来 捆扎 报纸 ． 接口处 共用 去 绳子 0.25 米 ， 接 好 后 的 绳子 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "390", "content": "一 条 绳 长 若干 米 ， 第一次 用 去 的 米 数 比 这根 绳 的 全长 的 (3/8) 少 10 米 ， 第 二 次 用 去 的 米 数 比 余下 的 (2/5) 多 40 米 ， 这时 还 剩下 260 米 ， 这根 绳子 的 全长 = 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21191", "content": "临洮县 今年 原 计划 造林 120 公顷 ， 实际 造林 150 公顷 ． 实际 造林 比 原 计划 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14530", "content": "新苗 小学 今年 有 计算机 120 台 ， 比 去年 增加 了 60 台 ， 今年 的 计算机 台数 比 去年 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11059", "content": "多少 / 7 = 20 … 5 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19845", "content": "小 华 从 家 到 图书馆 ， 按 每 小时 4 千米 的 速度 ， 步行 2.5 小时 可以 到达 ． 他 沿着 原 路 回家 ， 按 每 小时 5 千米 的 速度 ， 需要 步行 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18705", "content": "一 个 长方体 铁块 ， 长 10 分 米 ， 宽 5 分 米 ， 高 4 分 米 ， 每 立方分米 铁块 重 7.8 千克 ， 这个 铁块 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "22238", "content": "下面 小 明 运动 前后 心跳 的 测试 情况 ： 运动 后 每分钟 跳 140 下 ， 比 运动 前 多 65 下 ． 小 明 运动 前 每分钟 心跳 多少 下 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9081", "content": "有 25 棵 苹果树 ， 平均 每棵 苹果树 收 23 千克 苹果 ， 如果 每千克 苹果 卖 8 元 钱 ， 这些 苹果 一共 可以 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19561", "content": "1.2 * 0.85 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8940", "content": "工程队 要 修建 一条 长 126 km 的 公路 ． 甲 、 乙 两 小队 从 两端 同时 相向 修建 ， 14 天 修好 这 条 路 ， 甲队 每天 修 4 km ． 乙 队 每天 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7881", "content": "一 桶 油 用 去 一部分 后 ， 还 剩 15 千克 ， 剩下 的 是 这 桶 油 的 (3/5) ， 这 桶 油 共 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5433", "content": "新型 日光灯 管 3 小时 用电 (2/7) 千瓦时 ， 平均 每 小时 用电 多少 千瓦时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5255", "content": "小 明 读 《 3 国 演义 》 ， 已 读 的 和 未 读 的 页数 之 比 为 5 ： 4 ， 如果 再 读 27 页 ， 已 读 的 和 未 读 的 页数 之 比 为 2 ： 1 ， 求 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "216", "content": "一 个 养鸡场 星期一 收 的 鸡蛋 ， 18 千克 装 一箱 ， 装 了 21 箱 后 ， 还 剩下 16 千克 ， 这个 养鸡场 星期一 收 了 多少 千克 鸡蛋 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12987", "content": "商店 运 来 200 双 鞋 ， 分别 装 在 2 个 木箱 和 4 个 纸箱 中 ， 如果 3 个 纸箱 与 1 个 木箱 装 的 鞋 同样 多 ， 那么 ， 一个 纸箱装 多少 双 鞋 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22668", "content": "蜗牛 甲 每 小时 可行 2.79 米 ， 蜗牛 乙 每 小时 可行 3.21 米 ， 它们 同时 爬行 0.6 小时 ， 共 行 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17233", "content": "学校 买来 354 本 新书 ， 其中 科技 书 占 (1/6) ， 学科 辅导书 占 (1/4) ， 文艺 书 占 (1/3) ， 文艺 书 和 科技 书 共 买来 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16806", "content": "妈妈 给 小 青 11.10 元 ， 让 他 去 买 5 斤 香蕉 、 4 斤 苹果 ， 结果 他 把 买 的 数量 给 弄 颠倒 了 ， 从而 还 剩 0.60 元 ， 问 苹果 每斤 的 售价 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7839", "content": "一 辆 公交车 上 有 25 名 乘客 ， 到 站点 时 下去 了 8 名 乘客 ， 又 上来 13 名 乘客 ， 这时 车上 共有 多少 名 乘客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19880", "content": "汽车 上山 每 小时 行 20 千米 ， 3 小时 登顶 ， 下山 按 原 路 返回 ， 用 了 2 小时 ， 求 汽车 往返 的 平均速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12432", "content": "羚羊 每 小时 跑 24 km ， 斑马 的 速度 是 羚羊 的 1.2 倍 ， 鸵鸟 的 速度 是 斑马 的 1.8 倍 ， 鸵鸟 的 速度 = 多少 km ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16372", "content": "光明 小学 举行 迎 6 一 书画 比赛 ， 参加 比赛 的 女生 比 男生 多 15 人 ． 比赛结果 ， 男生 全部 获奖 ， 且 男 、 女生 获奖 的 人数 相等 ． 已知 获奖 的 女生 人数 占 女生 总 人数 的 70% ， 参加 比赛 的 男生 共有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13866", "content": "甲 、 乙 两个 圆柱体 容器 ， 底 面积 比 为 5 ： 3 ， 甲 容器 水深 20 厘米 ， 乙 容器 水深 10 厘米 ． 再 往 两个 容器 中 注入 同样 多 的 水 ， 使得 两个 容器 中 的 水深 相等 ． 这时 水深 多少 厘米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16583", "content": "五年级 和 六年级 共有 学生 260 人 ， 五年级 学生 人数 与 六年级 人数 的 比 为 7 ： 6 ， 六年级 有 多少 学生 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5988", "content": "60 克 盐 加上 多少 克 水 得 含盐 率 15% 的 盐水 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20164", "content": "甲 、 乙 两辆 汽车 分别 从 a 、 b 两地 出发 相向 而 行 ， 甲 车 先行 3 小时 后 乙 车 从 b 地 出发 ， 乙 车 出发 5 小时 后 两车 还 相距 15 千米 ． 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 50 千米 ． 求 a 、 b 两地 间 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "2348", "content": "国庆 促销 活动 ， 一件 衣服 降价 (1/10) ， 以 150 元 售出 ， 降价 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15655", "content": "江 小 云 要 把 24 千克 盐分 装 成 袋 ， 每 袋 (3/5) 千克 ， 可以 装 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9007", "content": "一 个数 减去 48 的 差 是 256 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14538", "content": "一 个数 除以 4 ， 商 和 余数 都 是 3 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11338", "content": "18 减去 它 的 (1/3) = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1358", "content": "中山 小学 四年级 有 245 人 分别 参加 了 3 个 兴趣小组 ． 其中 ， 参加 美术 兴趣小组 有 175 人 ， 参加 文艺 兴趣小组 有 25 人 ， 参加 体育 兴趣小组 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5555", "content": "小 明 买 了 6 个 相同 的 篮球 ， 付给 营业员 600 元 ， 找回 54 元 ． 每个 篮球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18780", "content": "食堂 有 一堆 煤 ， 每天 烧 0.45 吨 够 烧 140 天 ， 实际 烧 150 天 ， 实际 平均 每天 烧 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22192", "content": "3 、 四年级 同学 一共 收集 树种 65 千克 ， 三年级 同学 收集 6 袋 ， 每 袋 5 千克 ， 四年级 同学 收集 了 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22058", "content": "宇航员 乘 神州 飞船 在 太空飞行 ， 每人每天 要 消耗 0.9 千克 氧气 ． 3 位 宇航员 在 太空飞行 5 天 ， 一共 要 消耗 多少 千克 的 氧气 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8050", "content": "一 幢 楼 高 43 米 ， 第一层 高 4.6 米 ， 其余 每层 高度 都 是 3.2 米 ， 这幢 楼 共有 多少 层 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13921", "content": "仓库 里 有 海鲜 (7/8) 吨 ， 运走 了 (3/4) 吨 ， 又 运 进来 (5/6) 吨 ， 这时 仓库 里 的 海鲜 有 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12260", "content": "我校 六年级 作文 兴趣 组 有 80 人 ， 奥数 兴趣 组 比 作文 兴趣 组 人数 的 (3/5) 多 10 人 ， 奥数 兴趣 组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18361", "content": "一 个 商场 去年 销售 电视机 480 台 ， 比 前年 的 销售量 增加 20% ， 前年 销售 电视机 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2562", "content": "一 支 钢笔 27.4 元 比 一个 笔记本 贵 8.9 元 我 想 买 一支 钢笔 和 一个 笔记本 至少 要 带 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3609", "content": "一 把 椅子 52 元 ， 一张 课桌 148 元 ， 学校 买 了 35 套 座椅 ， 共 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15487", "content": "8.18 * 0.2 的 积 加上 0.46 / 4.6 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17193", "content": "五年级 数学 期末考试 ， 成绩优良 的 有 72 人 ， 刚好 占 全年 级 的 50% ， 全年 级 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "275", "content": "一 条 绳子 长 15 米 ， 剪 去 6 米 ， 剩下 的 是 全长 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12569", "content": "一 袋 面粉 ， 第一天 吃 去 总数 的 (1/4) ， 第 二 天 吃 去 总数 的 (1/3) ， 吃 去 的 正好 是 84 千克 ． 这 袋 面粉 一共 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2994", "content": "例 2 ： 灯泡厂 生产 灯泡 的 工人 ， 按 得分 的 多少 给 工资 ． 每 生产 一个 合格品 记 4 分 ， 每 生产 一个 不合格品 不仅 不 记分 ， 还要 扣除 15 分 ． 某 工人 生产 了 1000 只 灯泡 ， 共 得 3525 分 ， 问 其中 有 多少 个 灯泡 不 合格 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9384", "content": "一 列 长 70 米 的 火车 要 通过 一座 长 570 米 的 大桥 ， 火车 每秒钟 行 20 米 ， 火车 全部 过桥 需要 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "227", "content": "缝纫 厂 有 一段 18 米 长 的 布料 ， 每天 剪 去 2 米 ， 多少 天 剪 去 最后 一段 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18536", "content": "一 堆 砂石 ， 第一次 运走 了 总数 的 20% ， 第 二 次 运走 了 30 吨 后 ， 剩下 总数 的 (11/20) ， 这 堆 砂石 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9404", "content": "在 没有 余数 的 除法 算式 里 ， 商 相当于 被除数 的 (5/8) ， 除数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5694", "content": "李师傅 加工 一批 零件 ， 12 天 完成 了 全部 的 (3/4) ， 照 这样 计算 ， 完成 全部 零件 一共 要 多少 天 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18082", "content": "一 辆 玩具 汽车 原价 105 元 ， 现在 商店 打 0.7 销售 ， 比 原价 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8182", "content": "7 名 同学 任意 站 成 一排 ， 甲 恰好 站 在 中间 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11633", "content": "一 筐 苹果 20 元 ， 4 筐 草 霉 的 价格 相当于 6 筐 苹果 的 价格 ， 一筐 草莓 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17306", "content": "教室 里 8 盏灯 ， 全部 亮 着 ， 现在 关掉 了 6 盏灯 ， 教室 里 还有 多少 盏灯 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13657", "content": "小林 看 一本 85 页 的 故事书 ， 已经 看 了 48 页 ， 看 了 全书 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11641", "content": "修 一条 长 1960 米 的 路 ， 先是 每天 修 80 米 ， 修 了 8 天 以后 为了 尽快 完成 ， 以后 打算 每天 修 120 米 ， 还要 多少 天 才能 修 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8274", "content": "李 军 买 了 (2/3) 千克 奶糖 ， 每千克 的 价钱 是 18 元 ． 张 强 用 了 与 李 军 同样 多 的 钱 买 水果糖 ， 每千克 价钱 是 10 元 ． 张 强 买 了 多少 千克 水果糖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7639", "content": "1 克 盐 溶于 100 克 的 水中 ， 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19205", "content": "一 种 商品 现在 每件 120 元 ， 比 原来 降低 了 30 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22338", "content": "商店 出售 一种 电视 ， 原价 2500 元 ， 后来 打 0.85 出售 ． 这种 电视 现在 的 价钱 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11136", "content": "李 大爷 家 原来 养鸡 300 只 ， 占 鸡 和 鸭 总数 的 25% ． 后来 又 买来 了 一些 鸡 ， 这时 鸡 的 只 数 是 鸭 的 120% ． 买来 的 鸡 有 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5999", "content": "水果店 运 来 80 kg 梨 ， 运 来 的 苹果 比 梨 多 (1/4) ， 运 来 苹果 多少 kg ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10771", "content": "0.02 扩大 多少倍 是 25 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2279", "content": "一 个数 的 5 倍 是 210 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14305", "content": "4 辆 大 汽车 5 次 运煤 80 吨 ， 3 辆 小汽车 8 次 运煤 72 吨 ， 今 有 煤 350 吨 ， 一辆 大 汽车 和 一辆 小汽车 同时 运 需要 几次 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6221", "content": "挖 一段 水渠 ， 已 挖 的 是 未 挖 的 20% ， 已 挖 的 比 未 挖 的 少 400 米 ， 未 挖 的 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6585", "content": "植树节 时 ， 一班 48 人 ， 平均 每人 植树 4 棵 ； 二 班 有 47 人 ， 平均 每人 折 5 朵 ． 两个 班 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3285", "content": "一 个 畜牧场 有 山羊 250 只 ， 绵羊 的 只 数 是 山羊 的 7 倍 ． 这个 畜牧场 的 绵羊 比 山羊 多 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6482", "content": "合唱队 的 人数 比 舞蹈队 多 (2/3) ， 舞蹈队 的 人数 是 合唱队 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3605", "content": "某校 为了 制造 防风林 进行 植树 活动 ， 第一天 栽 了 总数 的 (1/5) 多 10 棵 ， 第 二 天 栽 的 棵 数 是 第一天 的 2 倍 ， 第 3 天 栽 了 30 棵 刚好 栽 完 ， 学校 共 栽 了 多少 棵 树 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "8833", "content": "学校 买 回 4 吨 钢材 ， 第一次 用 去 总数 的 25% ， 第 二 次 用 去 (1/2) 吨 ． 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22172", "content": "3 辆 汽车 2 次 运 货物 9600 千克 ， 平均 每辆 汽车 每次 运 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2413", "content": "一 箱 饮料 ， 如果 喝掉 25% 后 ， 还 剩下 18 瓶 ， 如果 喝掉 50% ， 还 剩下 多少 瓶 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8606", "content": "学校 运 来 400 棵 树苗 ， 老师 栽种 了 10% ， 余下 的 按 5 ： 4 ： 3 分配 给 甲 、 乙 、 丙 3 个 班级 ， 丙 班 分 到 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8107", "content": "一 种 运动鞋 原价 每 双 120 元 ， 现在 以 0.8 出售 ， 每 双 运动鞋 比 原价 便宜 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "672", "content": "一 头 大象 每天 吃 170 千克 食物 ， 一只 熊猫 3 天 吃 102 千克 食物 ． 大象 每天 吃 的 食物 是 熊猫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2391", "content": "学校 体育 室 有 篮球 25 个 ， 排球 个数 比 篮球 多 (1/5) ， 足球 比 排球 少 (1/3) ， 足球 有 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13176", "content": "在 植树节 时 ， 绿化 队 的 同志 把 900 棵 小树苗 平均 栽到 了 3 座 荒山 上 ， 每 座 荒山 上 的 树苗 都 栽 成 6 行 ． 那么 平均 每行 栽 了 多少 棵 树苗 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7703", "content": "学校 买来 - 批 图书 ， 借给 同学 们 348 本 后 ， 还 剩下 152 本 ， 后来 又 买来 560 本 ， 学校 两次 共 买来 多少 本 图书 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18160", "content": "美术 小组 的 5 个人 一共 画 了 32 幅 画 ， 除了 组长 赵 高 多 画 了 2 幅 外 ， 其余 同学 画 的 同样 多 ． 赵 高 画 了 多少 幅 画 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12515", "content": "甲 数 是 48 ， 它 的 (5/8) 等于 乙 数 的 (5/6) ， 乙 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13249", "content": "把 4 升 油 平均 装 在 8 个 壶里 ， 每个 装 油 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16649", "content": "鸵鸟 每 小时 跑 54.3 千米 ， 卡车 每 小时 行 48.6 千米 ， 鸵鸟 每 小时 比 卡车 多 跑 多少 千米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9370", "content": "李 叔叔 驾驶 着 一辆 装满 水果 的 货车 ， 从 果园 出发 到 车站 ． 去 时 速度 只有 45 千米 / 时 ， 用 了 4 小时 到达 火车站 ． 空车 返回 时 ， 只用 了 3 小时 ． 李 叔叔 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16688", "content": "学校 美术 小组 有 男同学 22 人 ， 女同学 16 人 ． 体育 小组 的 人数 是 美术组 的 3 倍 ， 体育 小组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19238", "content": "一 工厂 从 矿山 购进 铁矿石 800 吨 ， 已经 运来了 768 吨 ， 剩下 的 想 用 载重 8 吨 的 卡车 来 运 ， 并 一次 运 完 ， 问 需要 准备 多少 辆 这样 的 上车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14686", "content": "一 辆 自行车 原价 是 240 元 ， 现在 打 0.8 出售 ， 现价 比 原价 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17312", "content": "一 袋 大米 两周 吃 完 ， 第一周 吃 了 (1/3) ， 第 二 周 比 第一周 多 吃 了 5 千克 ， 这 袋 大米 共 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3874", "content": "沿着 一个 周长 是 800 米 的 鱼塘 的 一周 ， 每隔 20 米 栽 一棵 柳树 ， 一共 栽 多少 棵 柳树 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4624", "content": "同学 们 栽树 ， 四年级 栽 了 45 棵 ． 六年级 栽 的 比 四年级 的 2 倍 少 15 棵 ． 两个 年级 共 栽树 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10507", "content": "某 专业户 买 种子 用 去 250 元 ， 买 农具 的 钱 数 是 买 种子 的 2.4 倍 ， 买 化肥 比 买 农具 多用 78 元 ， 买 化肥 用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9207", "content": "4.04 / 4 * 2.5 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5195", "content": "(11/4) 与 (1/2) 的 和 除以 6 - (13/5) 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12442", "content": "一 桶 油 ， 第一次 用 去 12 千克 ， 第 二 次 用 去 (1/3) ， 还 剩 8 千克 ． 这 桶 油 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3429", "content": "一 个数 的 35 倍 是 490 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20928", "content": "陈 静 同学 读 一 本书 ， 前 6 天 读 30 页 ， 后 4 天 读 了 80 页 ， 她 平均 每天 读 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19432", "content": "一 根 绳子 长 (2/5) 米 ， 截 成 等 长 的 5 段 ， 每 段 是 全长 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11905", "content": "5 • 一班 有 女生 21 人 ， 男生 24 人 ， 女生 人数 占 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15515", "content": "甲 、 乙 两个 小组 共同 加工 一批 零件 ， 完成 任务 时 甲组 加工 这 批 零件 的 (2/5) ， 已知 甲组 每 小时 加工 55 个 ， 乙组 每 小时 加工 这 批 零件 的 (3/20) ， 求 这 批 零件 有 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6270", "content": "育才 小学 环保 队 分 两个 小组 捡 垃圾 ． 第一 小组 18 人 ， 一共 捡 垃圾 135 千克 ； 第 二 小组 22 人 ， 平均 每人 捡 垃圾 8 千克 ． 算 一 算 这个 环保 队 平均 每人 捡 垃圾 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6067", "content": "果园 里 有 桃树 360 棵 ， 桃树 的 棵 树 是 梨树 棵 树 的 (2/3) ， 苹果树 的 棵 树 是 梨树 的 (11/12) ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9247", "content": "农贸 公司 收购 鸭蛋 820 千克 ， 收购 的 鸡蛋 比 鸭蛋 的 3 倍 少 200 千克 ， 鸡蛋 和 鸭蛋 一共 收购 了 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11706", "content": "小 芳 计划 在 寒假 期间 写 52 页 毛笔字 ， 前 8 天 平均 每天 写 3 页 ， 剩下 的 7 天 写 完 ， 平均 每天 写 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11841", "content": "爷爷 今年 72 岁 ， 爸爸 的 年龄 是 爷爷 的 (5/8) ， 儿子 的 年龄 是 爸爸 的 (1/3) ． 儿子 今年 几岁 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4450", "content": "小 木匠 要 把 一根 长 1.6 米 的 木料 截 成 8 段 ， 要 截 多少 次 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15686", "content": "一 个 果园 占地 20 公顷 ， 其中 的 (2/5) 种 的 苹果树 ， 苹果 树种 了 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14985", "content": "妈妈 按 黑白 毛线 的 重量 比 4 ： 3 的 比例 搭配 起来 编织 毛衣 ， 黑 毛线 用 了 0.8 千克 ， 白 毛线 用 了 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1668", "content": "用 一台 抽水机 往 空 池内 注水 ， 上午 4 小时 注入 的 占 水池 容积 的 (8/21) ， 下午 又 注入 58.5 立方米 的 水 ， 正好 注满 ． 这个 水池 的 容积 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8328", "content": "一 辆 汽车 从 甲地 驶向 乙地 ， 行 了 全程 的 30% ， 离 了 还有 140 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11321", "content": "一 个数 有 约数 5 ， 又 是 3 的 倍数 ， 同时 又 能 被 2 整除 ， 这个 数 最小 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15308", "content": "红光 小学 科技 兴趣小组 有 甲 、 乙 两个 班 ， 人数 相等 ． 在 一次 竞赛 中 ， 甲班 有 12 名 学生 获奖 ， 乙班 有 (1/4) 的 学生 获奖 ， 甲 、 乙 两班 获奖 人数 比 是 3 ： 2 ， 甲班 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7056", "content": "小 王 、 小张 、 小 李 、 小 周 一起 折 千纸鹤 ． 小 王 和 小张 共 折 49 只 ， 小张 和 小 李 共 折 60 只 ， 小 李 和 小 周 共 折 83 只 ． 小 王 和 小 周 共 折 多少 只 ．", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13852", "content": "小 华 用 长 8 米 的 彩带 做 了 一些 花 ， 每 朵花 用 0.5 米 的 彩带 ． 她 把 其中 的 4 朵 送给 同学 ， 还 剩 几朵 花 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18710", "content": "简 算 ： 9999 + 999 + 99 + 9 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8130", "content": "田大爷 的 报摊 昨天 收款 230 元 ． 昨天 他 卖出 85 份 周报 ， 每份 1.5 元 ， 晚报 每份 0.5 元 ， 昨天 田大爷 卖出 多少 分 晚报 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11713", "content": "筑路 队 修 一条 10 千米 的 公路 ． 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 (3/2) 米 ， 还有 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19110", "content": "成人 体内 血液 是 体重 的 (1/13) ， 血液 中 约 含有 (12/25) 的 水 ． 李 叔叔 的 体重 是 65 千克 ， 他 的 血液 中 约 含有 多少 千克 水 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6556", "content": "小 刚 有 15 本 课外读物 ， 小 芳 课外读物 的 本 数 是 小 刚 的 (2/3) ， 小 英 课外读物 的 本 数 是 小 芳 的 (8/5) ， 小 英 有 多少 本 课外读物 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21228", "content": "被减数 是 32 ， 差 与 减数 的 比 是 5 ： 3 ， 差 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10402", "content": "一 辆 玩具车 的 价钱 是 48 元 ， 一辆 电瓶车 的 价钱 是 它 的 42 倍 还 多 300 元 ， 一辆 电瓶车 的 价钱 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3525", "content": "红星 小学 参加 数学 兴趣小组 的 有 24 人 ， 占 六年级 总 人数 的 (3/8) ， 红星 小学 六年级 共有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2527", "content": "某 商场 举行 促销 活动 ， 数码相机 按 原价 打 0.9 出售 ． 小 红 的 爸爸 花 了 2700 元 买 了 一部 ， 这种 相机 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4731", "content": "在 植树 活动 中 ， 一年级 有 372 人 参加 ， 二年级 参加 的 人数 比 一年级 少 83 人 ， 二年级 有 多少 人 参加 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13607", "content": "一 张 光盘 内 圆 直径 是 2 厘米 ， 外 圆 直径 是 12 厘米 ， 这 张 光盘 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "1332", "content": "有 一堆 苹果 ， 第一次 拿走 40% ， 第 二 次 比 第一次 多 拿 12 千克 ， 这 堆 苹果 还 剩 28 千克 ， 请问 这 堆 苹果 原来 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9558", "content": "六年级 男生 植树 120 棵 ， 女生 植树 80 棵 ， 女生 植树 数 是 总 植树 数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5622", "content": "新华书店 购进 了 一批 故事书 ， 共 500 本 ， 卖出 一些 后 ， 还 剩 3 包 ， 每包 25 本 ， 卖出 了 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "236", "content": "(6/7) 与 (7/15) 的 积 除以 30 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22511", "content": "460 减去 一个 数 得 241 ， 这个 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1127", "content": "池塘 中 去年 有 45 只 青蛙 生病 ， 改善 环境 后 ， 今年 青蛙 的 民 病 率 降低 了 60% ， 今年 有 几只 青蛙 生病 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18280", "content": "箭鱼 游动 时 的 速度 是 28 米 / 秒 ， 8 秒 可以 游 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17515", "content": "一 道 除法 试题 ， 余数 是 5 ， 除数 最小 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9282", "content": "把 5 罐 雪 碧 分给 8 个人 喝 ， 平均 每人 喝 多少 罐 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5052", "content": "计算 1.135 + 3.346 + 5.557 + 7.768 + 9.979 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "9965", "content": "学校 合唱队 有 80 人 ， 比 舞蹈队 人数 的 3 倍 多 5 ， 舞蹈队 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14730", "content": "一 个 机械 加工厂 ， 9 月份 生产 一种 零件 1000 个 ， 比 原 计划 多 生产 (1/4) ． 多 生产 多少 个 零件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8943", "content": "一 个 果园 里 有 桃树 100 棵 ， 是 梨树 的 (1/3) ， 梨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16739", "content": "商店 将 某种 型号 的 vcd 按 进价 的 140% 定价 ， 然后 再 实行 “ 0.9 酬宾 ， 外 送 50 元 出租车费 ” 的 优惠 ， 结果 每 台 vcd 获利 145 元 ． 那么 ， 每 台 vcd 的 进价 = 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17610", "content": "一 幅 条形 统计图 中 ， 用 1.5 厘米 表示 0.6 吨 ， 用 多少 厘米 表示 20 吨 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15182", "content": "甲 数 是 14.9 ， 乙 数 是 它 的 4.6 倍 ， 乙 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "801", "content": "一 桶 汽油 ， 倒 出 80% ， 正好 倒 出 24 千克 ， 这 桶 汽油 原来 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19639", "content": "一 个 书包 的 原价 是 120 元 ， 打 0.9 后 的 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20958", "content": "果园 里 有 苹果树 120 棵 ， 梨树 是 苹果树 棵 数 的 (3/4) ， 果园 里 有 梨树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12433", "content": "一 个数 的 25% 比 它 的 20% 大 15 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4785", "content": "8 个 240 相加 ， 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15426", "content": "一 个 水池 中 的 浮萍 每天 生长 速度 是 前一天 的 一倍 ， 第 15 天时 浮萍 才 长满 了 半 池 ， 长满 整个 池 要 多少 天 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16088", "content": "李 明 今年 12 岁 ， 比 爸爸 年龄 的 (1/4) 多 2 岁 ， 爸爸 今年 几岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19728", "content": "一 个数 减去 它 的 (2/5) 是 72 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17051", "content": "学校 买来 一捆 绳子 ， 第一天 用 去 150 米 ， 比 第 二 天 多 50 米 ， 用 2 天 后 还 剩 120 米 ， 这 捆 绳子 有 多少 米 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10516", "content": "50 * 38 与 22 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13968", "content": "五年级 上 学期 评出 优秀 少先队员 48 人 ， 占 全年 级 人数 的 24% ， 五年级 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11174", "content": "40 米 + 5 米 = 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15134", "content": "小 红 看 一本 80 页 的 故事书 ， 第一天 从 第一页 看 起 ， 看 了 全书 的 (1/5) ， 第 二 天 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2688", "content": "有 一条 公路 长 3200 米 ， 工程队 第一天 修 了 它 的 (1/4) ， 第 二 天 修 了 它 的 (1/5) ， 第 3 天 应该 从 多少 米处 开始 修 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5356", "content": "一 辆 货车 从 甲地 往 乙地 送货 ， 去 时 一 共用 了 5 小时 ， 回来 时 速度 提高 到 120 千米 / 时 ， 结果 3 小时 就 沿 原 路 返回 甲地 ， 这辆 货车 去 乙地 送货 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23025", "content": "小 红 问 王老师 今年 多 大 年纪 ， 王老师 说 ： “ 我 的 年纪 加上 9 ， 除以 4 ， 减去 2 ， 再 乘 3 ， 恰好 是 30 岁 ” ， 王老师 今年 多少岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8090", "content": "根据 推算 ， 地球 上 重 1 千克 的 物体 ， 在 月球 只有 (1/6) 千克 重 ． 那么 ， 体重 60 千克 的 人 ， 到 了 月球 上 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5885", "content": "两条 同样 长 的 电线 共 384 米 ， 分别 平均 剪成 了 4 段 用于 安装 电话 ， 平均 每 段长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7169", "content": "回族 小学 绿化 校园 ， 需要 铺 草坪 117 平方米 ， 4.5 天 铺 完 ， 实际 只用 了 3 天 就 完成 了 任务 ， 实际 每天 比 计划 每天 多 铺 多少 平方米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17149", "content": "一 袋 大米 ， 吃 了 它 的 62.5% ， 还 剩 15 千克 ． 这 袋 大米 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8312", "content": "一 个数 除以 6 商 9 余 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3928", "content": "学生 副 餐 有 一袋 牛奶 和 一份 点心 ， 牛奶 有 4 种 不同 口味 ， 点心 有 6 种 不同 花色 ， 共有 多少 种 不同 的 搭配 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3607", "content": "刀具厂 去年 销售 刀具 3400 套 ， 今年 比 去年 多 销售 600 套 ， 去年 的 销售量 是 今年 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10851", "content": "小民 放学 排队 上阵 ， 从前 往后 数 他 是 第 5 个 ， 从 后 往前 数 是 他 是 第 7 个 ， 这 一排 一共 有 多少 个 同学 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9700", "content": "青岛 至 济南 高速公路 全长 424 千米 ， 甲乙 两车 分别 从 两地 同时 相向 开出 ． 甲 车 每 小时 行 110 千米 ， 乙 车 每 小时 行 102 千米 ， 两车 几小时 可以 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5597", "content": "火车 从 a 地 开往 b 地 ， 已经 行驶 了 2964 千米 ， 是 剩下 路程 的 12 倍 ． 全部 路程 = 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13338", "content": "我 县 第一届 运动会 开幕式 于 11 月 在 体育场 举行 ， 观看 的 人员 坐在 看台 和 平坝 ． 看 台上 每排 有 250 人 ． 坐 了 40 排 ． 平坝 上 坐 了 8200 人 ， 一共 有 多少 人 观看 开幕式 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8623", "content": "一 盒 牛奶 重 (3/5) 千克 ， 4 盒 牛奶 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13868", "content": "一 张 《 喜 羊 羊 与 灰 太 狼 之 虎虎生威 》 的 光盘 内 圆 直径 是 2 厘米 ， 外 圆 直径 是 12 厘米 ， 这 张 光盘 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "18596", "content": "运输 组 要 运 150 吨 货物 ， 已经 运 了 它 的 (3/5) ， 运走 的 货物 中 有 (2/3) 是 用 卡车 运 的 ， 卡车 运 了 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9503", "content": "星期天 ， 小 刚 去 文具店 买 了 一枝 钢笔 与 一本 笔记本 共 花 去 9.6 元 ， 其中 一本 笔记本 的 价钱 是 钢笔 的 (3/5) ． 一枝 钢笔 的 价钱 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13585", "content": "一 个 正方体 玻璃缸 的 棱 长 为 4 分 米 ， 先 把 它 装满水 ， 再 把 这些 水 全部 倒入 一个 底 面积 为 20 平方分米 的 长方体 水槽 中 ． 槽 里 的 水面 高 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6068", "content": "学校食堂 买来 450 千克 白菜 ， 如果 买 的 土豆 比 白菜 少 (1/5) ， 买 的 土豆 有 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15091", "content": "一 卷 绳子 长 60 米 ， 第一次 用 去 了 12.5 米 ， 第 二 次 用 去 了 6.95 米 ， 用 了 两次 以后 ， 这 卷 绳子 比 原来 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22838", "content": "一 张 桌子 90 元 ， 一张 椅子 价钱 是 桌子 的 60% ， 一张 桌子 比 一张 椅子 贵 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15642", "content": "一 桶 花生油 连 桶 重 28 千克 ， 油 倒 出 一半 后 ， 连 桶 还 重 15 千克 ， 桶 重 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3231", "content": "学校 栽 一批 树苗 ， 成活率 为 98% ， 4 棵 死亡 ， 这 批 树苗 有 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6842", "content": "一 个 圆形 花坛 ， 直径 是 10 米 ， 这个 花坛 的 一 周长 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12493", "content": "一 间 办公室 ， 用 边长 0.3 米 的 方砖 铺 地 需要 150 块 ， 若 改用 边长 0.5 米 的 方砖 来 铺 ， 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10711", "content": "(2/3) / (4/5) * (5/7) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17096", "content": "一 本 故事书 共 160 页 ， 看 了 8 天 后 ， 还 剩下 40 页 没有 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21172", "content": "一 辆 汽车 从 甲地 到 乙地 ， 6 小时 行 了 全程 的 (3/5) ． 照 这样 计算 ， 还 需 多少 小时 才能 到达 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2542", "content": "噪音 对 人 的 健康 有害 ， 绿化 造林 可 使 噪音 降低 (1/8) ， 如果 汽车 发出 80 分贝 的 声音 ， 人 现在 听到 的 声音 = 多少 分贝 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12197", "content": "一 项 工程 ， 预计 15 个 工人 每天 做 4 个 小时 ， 18 天 可以 完成 ． 为了 赶工期 ， 增加 3 人 并且 每天 工作 时间 增加 1 小时 ， 可以 提前 几天 完工 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "3543", "content": "某 车间 25 天 生产 了 1200 个 零件 ， 比 原 计划 提前 5 天 完成 任务 ． 原 计划 平均 每天 生产 多少 个 零件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14853", "content": "一 个 直角三角形 的 两条 直角 边 分别 是 6 cm 和 8 cm ， 斜边 长 10 cm ， 这个 直角三角形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5839", "content": "小 明 每天 早上 锻炼 跳绳 11 分钟 ， 他 每分钟 大约 跳 96 下 ， 他 每天 大约 跳绳 多少 下 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10651", "content": "从 a 地 到 b 地 有 4 条 直达 铁路 ， 从 b 地 到 c 地 有 3 条 直达 铁路 ， 那么 从 a 地 到 c 地 ． 有 多少 种 不同 的 走法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7067", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 (1/4) ， 第 二 小时 行 了 (5/18) ， 两 小时 行 了 114 千米 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19517", "content": "工地 有 一堆 沙 ， 第一天 用 去 40% ， 第 二 天 用 去 10.8 吨 ， 两次 共用 去 这 堆 沙 的 62.5% ， 这 堆 沙 原有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4521", "content": "在 向 四川 地震 灾区 献爱心 的 活动 中 ， 前进 小学 二年级 捐款 120 元 ， 三年级 捐款 的 钱 数 是 二年级 的 2 倍 少 6 元 ， 三年级 捐款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "385", "content": "李 芸 母亲 的 月工资 是 1200 元 ， 按 个人所得税 规定 ， 每月 工资收入 扣除 800 元 后 的 余额 部分 ， 按 5% 的 比例 缴纳 个人所得税 ， 李 芸 的 母亲 每月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5660", "content": "甲 数 是 乙 数 的 (4/3) ， 那么 乙 数 比 甲 数 少 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13645", "content": "联想 电脑厂 二 月份 计划 生产 6000 台 电脑 ， 实际上 半月 完成 3600 台 ， 上 半月 完成 全 月 计划 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12673", "content": "有 一个 平行四边形 面积 为 240 平方分米 ， 已知 它 的 高 是 16 分 米 ， 底 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21138", "content": "王老师 存 了 3000 元 钱 ， 存期 为 3 年 ， 年利率 为 3.28% ， 到期 一次 支取 ， 到期 时 可以 取出 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2062", "content": "修 一条 公路 ， 已经 修 了 5.4 千米 ， 剩下 的 比 修好 的 2.1 倍 少 1.25 千米 ， 请问 剩下 多少 千米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13350", "content": "甲 、 乙 两地 之间 的 公路 长 500 千米 ． 客 、 货 两车 同时 从 甲 、 乙 两地 相对 开出 ， 经过 2 小时 两车 还 相距 300 千米 ． 照 这样 计算 ， 两车 还要 行 多少 小时 才能 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14755", "content": "灰 熊 奔跑 的 速度 约 每 小时 48 千米 ， 是 我们 人类 奔跑 速度 的 2 倍 ． 猎豹 是 世界 上 跑 得 最快 的 野生动物 ， 它 的 时速 是 人类 奔跑 速度 的 4.8 倍 ． 猎豹 的 最快 时速 约 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4271", "content": "修 一段 公路 原 计划 每天 修 60 米 ， 15 天 可以 修 完 ． 实际 每天 修 75 米 ， 实际 几天 就 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15770", "content": "现有 浓度 为 10% 的 盐水 20 千克 ， 再 加入 多少 千克 浓度 为 30% 的 盐水 ， 可以 得到 浓度 为 22% 的 盐水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19483", "content": "如果 银行 一年期 定期 储蓄 利率 是 3.25% ， 1000 元 人民币 定期 储蓄 一年 利息 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11719", "content": "用 6 根 短绳 连成 一条 长绳 ， 一共 要 打 多少 个 结 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19346", "content": "一 件 上衣 现价 200 元 ， 比 原价 降低 了 50 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10391", "content": "参加 数学 兴趣小组 的 女生 有 64 人 ， 男生 比 女生 的 3 倍 少 98 人 ， 数学 兴趣小组 有 男生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "40", "content": "水果店 运 来 苹果 36 箱 ， 运 来 的 生 梨 比 苹果 少 5 箱 ， 运 来 的 桔子 是 生 梨 的 3 倍 ， 运 来 桔子 多少 箱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18144", "content": "妈妈 买 一件 上衣 花 320 元 钱 ， 买 裤子 的 钱 是 上衣 的 (3/4) ， 买 皮鞋 的 钱 是 裤子 的 (5/6) ． 妈妈 买 皮鞋 花 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1721", "content": "甲 数 是 120 ， 乙 数 比 甲 数 的 3 倍 多 32 ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19111", "content": "刘老师 的 月工资 是 1500 元 ， 如果 按 个人所得税法 规定 ： 每月 收入 扣除 800 元 后 的 余额 部分 ， 按 5% 的 比例 缴纳 个人所得税 ． 刘老师 每月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7330", "content": "杜 公 河 从 清河 村 到 太 家 头 村 这 段长 965 米 ， “ 幸福 渠 ” 工程队 修 了 15 天 后 还 剰 365 米 ， “ 幸福 渠 ” 工程队 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18313", "content": "一 本 收 厚 1.3 厘米 ， 1000 本 这样 的 书 厚 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8762", "content": "张 大伯 把 一车 蔬菜 送到 菜市场 ， 去 时 的 速度 44 千米 / 时 ， 用 了 3 小时 送到 ， 返回 时 只用 了 2 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14120", "content": "王 欣 骑车到 郊外 野餐 ， 2 小时 行 了 全程 的 (3/4) ， 用 这样 的 速度 多少 小时 可以 行 完全 程 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16436", "content": "一 辆 卡车 可以 装 3 吨 货物 ， 这样 的 5 辆 卡车 可以 装 多少 吨 货物 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14245", "content": "饲养场 有 鸡 、 鸭 、 鹅 共 2650 只 ， 其中 鸡 有 628 只 ， 鸭 有 1020 只 ， 鹅 有 多少 只 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15", "content": "15 个 小朋友 捉迷藏 ， 已经 捉住 了 4 人 ， 还有 多少 人 没 捉住 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2502", "content": "20 只 猴子 一共 吃 了 38 个 桃 ， 每 只 大 猴 吃 3 个 ， 每 只 小 猴 吃 1 个 ， 请 你 算 一 算 ， 大 猴 有 多少 只 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12730", "content": "生产 一种 零件 ， 原来 每个 零件 需要 2.4 千克 钢材 ． 改进 工艺 后 ， 每个 零件 可 省 钢材 0.2 千克 ， 原来 生产 880 个 零件 的 钢材 ， 现在 可以 生产 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20602", "content": "一 家 城市 中 的 饭店 ， 除了 要 按照 营业额 的 5% 缴纳 营业税 外 ， 还要 按照 营业税 的 7% 缴纳 城市 维护 建设 税 ． 如果 这家 饭店 每个 月 的 营业额 是 12 万元 ， 它 每个 月 应该 缴纳 这 两种 税 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "17847", "content": "三年级 学生 喜欢 打乒乓球 的 有 75 人 ， 喜欢 打篮球 的 有 53 人 ， 这 两样 都 喜欢 的 有 23 人 ， 喜欢 打乒乓球 和 篮球 的 一共 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21451", "content": "楚 天 小学 240 名 同学 参观 航空 模型 展 ， 他们 站 成 4 队 ， 每队 6 个 小组 ． 平均 每个 小组 有 多少 名 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15023", "content": "一 件 衣服 比 原来 便宜 (3/10) ， 正好 便宜 了 21 元 ． 这件 衣服 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3651", "content": "一 个数 的 (1/2) 比 它 的 (1/3) 多 8 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4309", "content": "合唱队 43 人 坐车到 火山岛 参观 ， 车票 、 门票 各 38 元 ， 算 一 算 一 ， 应该 准备 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7353", "content": "一 台 电冰箱 原来 成本 是 1200 元 ， 现在 每 台 成本 降低 了 20% ， 现在 每 台 成本 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4696", "content": "邮局 汇款 的 汇率 是 1% ， 在外 打工 的 小 明 的 爸爸 给 家里 汇钱 ， 一共 交 了 45 元 的 汇费 ， 小 明 的 爸爸 一共 给 家里 汇 了 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6423", "content": "狗 追 兔子 ， 狗 跑 一步 前进 2.8 公尺 ， 兔子 跑 一步 前进 1.7 公尺 ， 每当 狗 跑 2 步 时 ， 兔子 恰好 跑 了 3 步 ． 如果 兔子 和 狗 的 距离 是 50 公尺 ， 当 狗 追 上 兔子 时 ， 兔子 跑 了 多少 公尺 ﹖", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15236", "content": "人体 血液 重量 约 占 人体 重量 的 8% ， 小 明 的 体重 是 40 千克 ， 求 他 体内 的 血液 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14926", "content": "学校 合唱组 和 舞蹈 组 共有 144 人 ， 舞蹈 组 人数 是 合唱组 人数 的 (5/7) ， 合唱组 人数 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13107", "content": "李 叔叔 购买 一台 电脑 ． 如果 要 分期付款 ， 需要 首付 3500 元 ， 以后 每月 付 265 元 ， 共 付 12 个 月 ． 如果 一次性 付款 ， 只 需 付 6000 元 ． 李 叔叔 购买 这 台 电脑 分期付款 要 比 一次 陆 付款 多 花 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18141", "content": "新年 就要 到 了 ， 妈妈 去 超市 准备 年货 ． 新 购置 的 椅子 每 把 68 元 ， 妈妈 给 收银员 450 元 找回 了 42 元 ． 妈妈 买 了 几把 新 椅子 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12111", "content": "实验 小学 去年 植树 60 棵 ， 今年 春季 植树 的 棵 数 比 去年 多 20% ， 今年 春季 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2011", "content": "“ 6 一 ” 活动 ， 小 明 做 了 120 朵 红花 ， 小 芳 做 的 比 小 明 的 2 倍 少 10 朵 ， 小 芳 做 了 多少 朵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19585", "content": "一 个 乘数 是 11 ， 另 一个 乘数 是 80 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12127", "content": "2.4 与 0.48 的 差 乘以 5 ， 所得 的 积 除以 12 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17861", "content": "某 数 的 75% 比 它 的 (2/5) 多 14 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13420", "content": "阶梯教室 里 原来 有 9 排座位 ， 每排 20 张 椅子 ． 有 一次 开会 时 ， 临时 又 增加 了 48 张 椅子 ， 这 进 阶梯教室 里 一共 有 多少 张 椅子 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3857", "content": "利民 食品厂 生产 牛奶 饼干 3.6 吨 ， 比 生产 的 果汁 饼干 多 (1/5) ， 两种 饼干 一共 生产 了 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7122", "content": "一 条 路 已经 修 了 44% ， 比 未 修 部分 少 360 米 ， 这 条 路 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2810", "content": "一 种 电扇 300 元 ， 先后 两次 降价 ， 第一次 按 0.8 售出 ， 第 二 次 降价 10% ． 这种 电扇 最后 售价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2283", "content": "小林 的 妈妈 去 市场 买 水果 ． 她 先 花 3.5 元 买 了 2.5 kg 苹果 ， 还 准备 买 3 kg 橙子 ， 橙子 的 单价 是 苹果 的 1.6 倍 ， 买 橙子 应付 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18863", "content": "(3/10) 与 (1/5) 的 和 等于 一个 数 的 (4/5) ， 这个 数 = ？ 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19627", "content": "甲 、 乙 两 人 分别 从 a 、 b 两地 同时 相向 而 行 ， 当 甲 走出 42 千米 时 ， 乙 恰好 走 完 了 a 、 b 两地 之间 距离 的 (1/3) ， 此时 两 人 相距 12 千米 ， 则 a 、 b 两地 之间 距离 为 多少 千米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9436", "content": "食堂 买来 面粉 800 千克 ， 买来 的 大米 比 面粉 的 (3/4) 还 少 50 千克 ， 买来 大米 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11102", "content": "甲 数 是 乙 的 60% ， 丙 数 是 甲 数 的 20% ， 则 丙 数 比 乙 数 少 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13003", "content": "儿童 剧场 楼下 有 405 个 座位 ， 楼上 有 9 排 ， 每排 有 32 个 座位 ， 儿童 剧场 共有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17070", "content": "计算 ： 1.25 * 31.3 * 24 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12985", "content": "一 种 录音机 ， 每 台 原价 220 元 ， 迎 “ 十一 ” 降价 20% ， 现价 多少 元 ？ ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3748", "content": "小 方 从 家 到 学校 ， 每分钟 走 60 米 ， 需要 14 分钟 ， 如果 她 每分钟 多 走 10 米 ， 需要 多少 分钟 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "290", "content": "小 明 看 一 本书 ， 第一天 看 了 (1/6) ， 第 二 天 看 的 相当于 第一天 的 (5/7) ， 还 剩 290 页 ． 这 本书 一共 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4790", "content": "一 座 温室 ， 室内 耕地面积 是 285 平方米 ， 全部 栽种 西红柿 ， 一茬 平均 每平方米 产 6 千克 ． 每千克 按 0.65 元 计算 ， 一共 可以 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1969", "content": "面粉厂 去年 上半年 完成 全年 任务 的 (2/3) ， 下半年 再生产 1500 吨 就 可以 超产 300 吨 ， 去年 计划 生产 面粉 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8096", "content": "粮油 公司 原有 金 龙牌 食用油 804 瓶 ， 售出 176 瓶 后 ， 又 赠送给 特困户 268 瓶 ． 现在 还 剩 多少 瓶 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2285", "content": "甲 数 的 (2/3) 比 乙 数 的 25% 多 40 ， 已知 乙 数 是 160 ， 求 甲 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9399", "content": "为 庆祝 北京 奥运会 的 召开 ， 红星 小学 的 同学 们 准备 折 2008 只 白 鸽 ， 已经 折 了 658 只 ， 剩下 的 分给 15 个 班 去 做 ， 平均 每班 折 多少 只 白 鸽 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10378", "content": "生产 一种 机器 零件 ， 现在 每件 成本 是 15 元 ， 比 原来 节约 成本费 5 元 ， 现在 的 成本 是 原来 成本 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18545", "content": "学校 买 了 60 盒 白粉笔 ， 买 的 红粉 笔数 是 白粉笔 的 (1/4) ， 又 是 彩色 粉笔 的 (3/5) ， 学校 买 了 多少 盒 彩色 粉笔 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17314", "content": "20 吨 减少 75% 后 = 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16728", "content": "8 = 多少 的 160% ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21202", "content": "一 根 绳子 长 20 米 ， 捆 一个 盒子 用 (3/5) 米 ， 捆好 18 个 后 ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2209", "content": "货场 有 一批 煤 ， 第一次 运走 总数 的 20% ， 第 二 次 运走 总数 的 40% ， 两次 一共 运走 60 吨 ， 这 批 煤 还 剩 多少 吨 没有 运走 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21445", "content": "果园 里 种 了 6 行 苹果树 ， 每行 15 棵 ， 还 种 了 45 棵 桃树 ， 果园 里 一共 种 了 多少 棵 果树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6885", "content": "王 爷爷 今年 共 收 了 3600 棵 大白菜 ， 运走 了 15 车 后 ， 还 剩 600 棵 ． 平均 每 车运 多少 棵 大白菜 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6906", "content": "甲 、 乙 、 丙 3 人 每分钟 的 速度 分别 为 30 米 、 40 米 、 50 米 ， 甲 、 乙 在 a 地 同时 同 向 出发 ， 丙 从 b 地 同时 出发 去 追赶 甲乙 ， 丙 追 上 甲 以后 又 经过 10 分钟 才 追 上 乙 ， 则 ab 两地 的 距离 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6487", "content": "把 一根 长 (8/9) 米 的 铁丝 截 成 若干 相等 的 小 段 ， 一共 截 了 5 次 ， 平均 每 段长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22646", "content": "一 名 打字员 要 打 一篇 1500 字 的 文稿 ， 先 打 了 1000 字 又 打 了 300 字 ， 还 剩 多少 字 没有 打 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15120", "content": "光华 电机厂 第 二 车间 计划 10 天 生产 135 型 凤凰 相机 750 架 ， 实际 超额 (1/5) ， 实际 生产 了 多少 架 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2002", "content": "王大妈 把 1500 元 钱 入 银行 ， 按 年利率 2.25% 计算 ， 5 年 后 王大妈 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "323", "content": "农机站 有 840 千克 柴油 ， 用 了 8 天 ， 还 剩下 640 千克 ， 平均 每天 用 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9228", "content": "小 王 买 了 21 千克 青菜 ， 买 的 青菜 是 萝卜 的 (7/8) ， 买 的 辣椒 是 萝卜 的 (5/6) ． 小 王 买 了 辣椒 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2086", "content": "王 阿姨 每天 能 做 100 朵 绒花 ， 王 阿姨 4 天 做 的 花 张 阿姨 要 5 天 才能 做好 ， 张 阿姨 要 做 1280 朵花 ， 几天 才能 做好 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7084", "content": "0.75 / 10.5 的 商 减去 1.36 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2722", "content": "一 个 三角形 底 是 10 厘米 ， 是 高 的 2 倍 ， 这个 三角形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15027", "content": "从 240 里 减 6 ， 需要 减 多少 次 才 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8019", "content": "教学 装备 中心 要 给 我 乡 四年级 125 名 同学 配备 桌椅 ． 课桌 每张 35 元 ， 椅子 每 把 12 元 ． 共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10703", "content": "一 根 竹竿 长 4.2 米 ， 第一次 用 去 全长 的 (2/7) ， 第 二 次 用 去 1.3 米 ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4049", "content": "一 列 火车 从 上海 开往 天津 ， 行 了 全程 的 (3/5) ， 剩下 的 路程 ， 如果 每 小时 行 106 千米 ， 5 小时 可以 到达 天津 ． 上海 到 天津 的 铁路 长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "614", "content": "15 分钟 做 30 个 零件 ， 做 一个 零件 平均 要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14470", "content": "装配 小组 要 装配 一批 洗衣机 ， 计划 每天 装配 27 台 ， 20 天 完成 任务 ． 实际 每天 装配 了 30 台 ， 只 需 几天 就 可以 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17736", "content": "一 堆 沙 重 20 吨 ， 用 去 (1/5) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9982", "content": "修路 队 修 一条 800 米 长 的 路 ， 已经 修 了 226 米 ， 剩下 的 计划 每天 修 82 米 ， 还 需 几天 可以 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16767", "content": "有 甲 ， 乙 两筐 水果 ． 甲 重 25 千克 ． 如果 从 乙 筐 中 拿出 10 千克 放入 甲 筐 ． 这时 乙 筐 的 重量 是 甲 筐 的 (4/7) ． 乙 筐 原来 有 多少 千克 水果 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13018", "content": "实验 小学 的 教学楼 有 4 层 ， 每层 有 7 间 教室 ， 每间 教室 有 74 名 学生 ， 请 你 算 一 算 ， 教学楼 共 容纳 多少 名 学生 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7725", "content": "两辆车 同时 从 相距 4000 米 的 两地 相对 开出 ， 40 分钟 后 相遇 ， 甲 车 每分钟 行驶 65 米 ， 乙 车 每分钟 行驶 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19136", "content": "个体户 杨 阿姨 5 月份 按 营业 收入 的 3% 交 营业税 120 元 ， 这个 月 她 的 营业 收入 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21420", "content": "在 一个 圆形 花坛 边上 每隔 2 米 摆 一盆 月季花 ， 一共 摆 了 35 盆 ． 这个 花坛 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4105", "content": "小民 身高 110 厘米 ， 小 红 身高 139 厘米 ， 小民 比 小 红 矮 多少 厘米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7728", "content": "一 个 因数 是 213 ， 另 一个 因数 是 7 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22615", "content": "一 项 工程 ， 甲 单独 做 要 10 天 完成 ， 乙 单独 做 要 15 天 完成 ， 如果 两 人 合 做 ， 需 多少 天 完成 这项 工程 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1618", "content": "一 批 原料 (3/4) 吨 ， 第一天 用 去 (2/5) ， 第 二 天 用 去 余下 的 (2/7) ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "12679", "content": "一 根 长 240 厘米 的 钢条 ， 每次 锯 一段 ， 要 锯 成 30 厘米 长 的 小 段 ， 一共 要 锯 多少 次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12312", "content": "某 工厂 存 煤 148 吨 ， 按计划 烧 了 8 天 后 ， 还 剩下 84 吨 ， 如果 以后 每天 烧煤 量 相当于 计划 的 87.5% ， 以后 每天 烧煤 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16871", "content": "某 厂 今年 实际 产值 为 1500 万元 ， 超过 计划 产值 (1/4) ， 该厂 今年 计划 产值 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4767", "content": "一 种 农药 是 用 药液 和 水 按 1 ： 1500 配制 而 成 ． 现在 有 6 千克 药液 ， 可以 配制 这种 农药 几千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11074", "content": "我国 一次性 泡沫塑料 饭盒 的 使用量 日均 3000 万个 ， 每 制造 1 万个 泡沫塑料 饭盒 要 用 去 0.012 吨 塑料 ， 每吨 塑料 可 加工 20 万 把 小学生 学习 用 的 塑料 尺 ． 制造 我国 每天 使用 的 一次性 泡沫塑料 饭盒 所用 去 的 塑料 可以 加工 多少 万 把 小学生 学习 用 的 塑料 尺 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16152", "content": "小 方 和 小 丽 同时 从 家 出发 ， 相对 而 行 ， 小 方 每分钟 走 70 米 ， 小 丽 每分钟 走 60 米 ， 经过 6 分钟 两 人 在 学校 相遇 ． 她们 两家 相距 多少 米 ？ ", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14260", "content": "一 堆 煤 ， 第一周 用 去 这 堆 煤 的 (2/5) ， 第 二 周 用 去 这 堆 煤 的 (1/3) ， 还 剩下 60 吨 ． 这 堆 煤 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13448", "content": "计算 54 - 12 * 3 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 计算 的 结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7737", "content": "小 冬 带 10 元 钱 去 买 文具 ， 他 买 了 一支 钢笔 和 一瓶 墨水 ， 售货员 找 给 他 2.6 元 钱 ， 小 冬 买 文具 共 花 了 多少 元 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9088", "content": "小 明 家 现在 能 收看 56 套 电视节目 ， 比 开通 有线电视 前 的 5 倍 少 4 套 ． 开通 有线电视 前 只能 收看 几套 节目 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20713", "content": "万 地 商店 今年 第 4 季度 的 营业额 是 56 万元 ， 比 第 3 季度 增长 了 6 万元 ． 增长 了 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4744", "content": "学校 图书馆 的 科技 书 、 文艺 书 和 故事书 共 12000 本 ， 其中 科技 书 占 (1/3) ， 文艺 书 与 故事书 的 比 是 2 ： 3 ， 故事书 有 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4768", "content": "箱子 里 有 2 个 白 球 和 若干个 红球 ， 一次 至少 要 摸 出 多少 个 球 ， 才能 保证 有 红球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7406", "content": "某 数 除以 3 和 5 都 余 1 ， 这个 数 最小 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20666", "content": "超市 卖出 106 个 乒乓球 ， 卖出 的 羽毛球 比 乒乓球 的 3 倍 少 18 个 ． 羽毛球 比 乒乓球 多 卖出 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1742", "content": "甲 数 是 3256 ， 比 乙 数多 785 ， 乙 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5435", "content": "一 个数 的 15% 比 它 的 (1/5) 少 20 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3880", "content": "从 880 中 连续 减去 4 ， 要 得到 结果 是 0 ， 需 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17229", "content": "一 个数 的 (2/5) 比 (3/5) 少 20% ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12082", "content": "连云港 到 广州 的 飞机票 全价 980 元 ． 李老师 按 0.6 购买 了 一张 这样 的 机票 ， 他 省 下 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19843", "content": "一 条 路 以 经 修好 了 (3/5) ， 还 剩 240 米 没有 修 ， 修 了 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10190", "content": "民和 乡 某 小学 的 180 名 少先队员 在 “ 爱心 日 ” 去 乡 敬老院 帮助 老人 做事 ． 这些 少先队员 平均 分成 5 队 ， 每队 分成 4 组 劳动 ． 平均 每组 有 多少 名 少先队员 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17942", "content": "把 一个 棱 长 为 6 分 米 的 正方体 铁块 锻造 成 一个 底面 是 12 平方分米 的 长方体 ， 这个 长方体 的 高 = 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6265", "content": "一 件 儿童 上衣 68 元 ， 比 裤子 便宜 12 元 ， 一双 鞋 又 比 裤子 贵 18 元 ， 这 双 鞋 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3848", "content": "6 个 分别 很 久 的 朋友 聚在一起 ， 每 2 个人 握 一次 手 ， 他们 一共 要 握 多少 次 手 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9185", "content": "晶晶 看 一本 129 页 的 故事书 ， 已经 看 了 7 天 ， 每天 看 12 页 ， 剩下 的 每天 看 15 页 ， 再 用 几天 可以 看 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18398", "content": "红旗 自行车厂 生产 了 12.5 万辆 自行车 ， 计划 其中 60% 销往 国外 ， 国外市场 的 自行车 有 多少 辆 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21375", "content": "一 辆 自行车 的 直径 是 0.4 米 ， 如果 小 明 骑 着 这辆 自行车 以 每分钟 100 圈 的 速度 经过 一座 桥 ， 一 共用 了 3 分钟 ， 那么 这 座 桥 有 多长 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6899", "content": "聪聪 的 体重 是 31 千克 ， 爸爸 的 体重 比 聪聪 的 体重 2 倍 多 3 千克 ． 爸爸 的 体重 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17005", "content": "一 本书 打 0.75 出售 的 售价 是 12 元 ， 这 本书 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3531", "content": "一 头牛 一天 吃 25 千克 草 ． 2 头牛 4 天 要 吃 多少 千克 草 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5958", "content": "为 绿化 城市 ， 某 街道 要 栽种 一批 树苗 ， 这 批 树苗 的 成活率 是 75% ～ 80% ． 如果 要 栽 活 1400 棵 树苗 ， 至少 要 栽种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5972", "content": "一 台 笔记本电脑 原来 的 价钱 是 12000 元 ， 由于 成本 的 降低 ， 现价 比 原价 降低 (3/10) ， 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15790", "content": "学校 今年 购进 篮球 16 个 ， 购进 的 排球 比 篮球 的 1.5 倍 少 4 个 ． 学校 今年 购进 排球 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17442", "content": "妈妈 拿 了 100 元 钱 去 买 了 3.8 千克 橘子 ， 每千克 橘子 2.9 元 ， 妈妈 买 橘子 用 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17201", "content": "一 块 宽 为 5 米 的 长方形 菜地 ， 它 的 面积 与 边长 10 米 的 正方形 面积 相等 ． 这块 长方形 菜地 的 长 = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1788", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行驶 了 全程 的 (3/5) ， 正好 行驶 了 120 千米 ， 甲 、 乙 两地 之间 的 路程 长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7903", "content": "一 个 长 、 宽 、 高 分别 为 6 米 ， 3 米 ， 5 米 的 水池 ， 它 的 占地面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16026", "content": "加工 一批 零件 ， 计划 每天 加工 40 个 ， 20 天 完成 ， 实际 每天 多 加工 10 个 ， 实际 提前 多少 天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13128", "content": "小 明 从 甲地 到 乙地 坐 汽车 用 了 12 小时 ， 每 小时 行 76 千米 ， 返回 时 ， 小 明 只用 了 8 小时 ， 小 明 返回 的 速度 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6756", "content": "有 一捆 铁丝 ， 张师傅 每天 用 去 (7/10) 米 ， 用 了 20 天 ， 还 剩 (3/10) 米 ， 这 捆 铁丝 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8536", "content": "甲 、 乙 两列 汽车 同时 从 两地 出发 ， 相向 而 行 ． 已知 甲 车 每 小时 行 45 千米 ， 乙 车 每 小时 行 32 千米 ， 相遇 时 甲 车 比 乙 车 多行 52 千米 ． 求 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2720", "content": "妈妈 买 回 一些 苹果 ， 分给 小强 和 他 的 6 个 朋友 ， 每人 正好 分 到 8 个 ， 妈妈 一共 买 了 多少 苹果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13764", "content": "一 幢 高 50 米 、 长 30 米 、 宽 25 米 的 住宅楼 ， 我们 说 这幢 楼 的 占地面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7765", "content": "一 堆 沙子 ， 用 汽车 已经 运走 了 24 吨 ， 余下 的 比 运走 的 多 (1/5) ， 这 堆 沙子 原来 重 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14424", "content": "54 减去 某 数 的 4 倍 等于 6 ， 求 某 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3210", "content": "一 本 故事书 共 290 页 ， 李 明 看 了 20 页 ， 剩下 的 他 想 每天 看 30 页 ， 再有 几天 他 能 看 完 这 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5759", "content": "筑路 队 修 一条 公路 ， 第一周 修 了 全长 的 (1/6) ， 第 二 周 修 了 全长 的 (2/9) ， 还 剩 这 条 公路 的 几分 之 几 没 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14316", "content": "一 个数 的 38.6 倍 是 40.53 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19721", "content": "王 小 艳 从 家 走 到 学校 需要 9 分 ， 她 每 分 走 54 米 ， 王 小 艳 家 到 学校 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7389", "content": "录音机 厂 第 3 季度 计划 生产 录音机 3600 台 ， 实际 生产 4500 台 ， 实际 产量 超过 计划 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14196", "content": "0.9 与 0.6 的 差 除以 这 两个 数 的 和 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "859", "content": "星期天 ， 小 华 骑 自行车 去 郊游 ． 去 时 平均 每 小时 行 14 千米 ， (6/7) 小时 到达 ， 原 路 返回 时 只用 了 (3/4) 小时 ． 小 华 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16944", "content": "一 种 电视机 原价 2500 元 ， 现在 降价 (1/5) ． 现在 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21789", "content": "(3/8) * 16 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4459", "content": "多少 米 的 (3/5) 是 5 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2854", "content": "小 红 每步 走 0.36 米 ， 她 从 家 到 学校 走 了 360 步 ， 她家 到 学校 有 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18312", "content": "食堂 买 大米 (14/5) 吨 ， 第一天 吃 了 (4/5) 吨 ， 第 二 天 吃 了 余下 的 (3/5) ， 两天 共 吃 了 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12586", "content": "仓库 运 来 大米 240 吨 ， 运 来 的 大豆 是 大米 吨数 的 (5/6) ， 大豆 的 吨数 又 是 面粉 的 (3/4) ． 运 来 面粉 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7769", "content": "明明 今天 买 玩具 共用 去 62.5 元 ， 买 课外书 比 买 玩具 多用 34.8 元 ， 妈妈 为 明明 付钱 ， 给 售货员 阿姨 200 元 钱 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18709", "content": "小 明 体重 38 千克 ， 爸爸 的 体重 是 他 的 1.9 倍 ， 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12359", "content": "某个 养猪场 共有 6 个 猪圈 ， 每个 猪圈 养 有 5 头 猪 ， 一天 共 喂 饲料 300 千克 ． 平均 每天 每 头 喂 多少 千克 的 饲料 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8859", "content": "将 500 毫升 95% 的 酒精 加水 后 ， 使 它 成为 75% 的 酒精 溶液 ． 大约 加水 多少 毫升 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6761", "content": "希望 小学 校舍 建设 用 去 35 万元 ， 比 计划 少 用 5 万元 ， 节约 了 多少 %", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9427", "content": "要 挖 一个 长方形 储 水池 ， 长 为 6 米 ， 宽 为 3.5 米 ， 要 使 这个 储 水池 的 容积 为 42 立方米 ， 应 挖 多 深 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15906", "content": "一 堆 货物 ， 甲 车 运走 24 吨 ， 是 乙 车 的 (4/5) ， 丙 车运 的 是 乙 车 的 (2/3) ． 丙 车运 了 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8664", "content": "在 花样 跳绳 活动 中 ， 跳 长绳 的 有 80 人 ， 跳 短绳 的 比 跳 长绳 的 2 倍 少 40 人 ． 跳 短绳 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7803", "content": "筑路 队 前 12 天 修路 24 千米 ， 照 这样 的 速度 ， 又 修 了 16 天才 修 完 这 条 路 ， 这 条 路 共 长 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17127", "content": "1025 + 6487 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6288", "content": "一 个 圆柱 底面 半径 是 2 厘米 ， 高 3 厘米 ， 将 它 的 底面 平均 分成 若干个 扇形 后 ， 再 截开 拼成 一个 和 它 等 底 等 高 的 长方体 ， 它 的 体积 = 多少 平方厘米 ？", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "14676", "content": "一 台 电视机 ， 现价 2400 元 比 原价 降低 (1/7) ， 这 台 电视机 比 原价 降低 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23004", "content": "要 运 粮食 184.5 吨 ， 已经 运 了 4 天 ， 平均 每天 运 22.5 吨 ， 余下 的 3 天运 完 ， 平均 每天 运 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17152", "content": "把 2 l 药水 分装 在 容量 是 (1/15) l 的 小瓶 里 ， 可 装 多少 瓶 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5709", "content": "一 辆 汽车 用 一天 的 时间 从 甲 城 开往 乙 城 ， 上午 行 了 全程 的 (7/13) ， 上午 比 下午 多行 全程 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "852", "content": "修 一条 公路 ， 第一天 修 了 这 条 路 的 (1/4) ， 第 二 天 修 了 这 条 路 的 20% ， 比 第一天 少 修 了 50 米 ， 这 条 路 一共 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20904", "content": "一 堆 圆木 ， 每 相邻 两层 都 相差 1 根 ， 最上层 2 根 ， 最 下层 6 根 ， 一共 堆 了 5 层 ， 这 堆 圆木 共 多少 根 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15984", "content": "林 林 和 芳 芳 打 同 一份 稿件 ． 林 林 每 分 打 65 个 字 ， 8 分 可以 完成 ． 芳 芳 打 完 这份 稿件 要 用 10 分 ， 芳 芳 每 分 打 多少 个 字 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3738", "content": "一 桶 油 ， 第一次 用 去 (3/5) 千克 ， 第 二 次 用 去 0.9 千克 ， 还 剩 (1/2) 千克 ． 这 桶 油 原 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16862", "content": "在 一次 知识 竞赛 中 有 40 人 参加 ， 其中 语文 有 25 人 及格 ， 数学 有 20 人 及格 ， 两 科 都 不及格 的 有 10 人 ， 两 科 都 及格 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2382", "content": "一 个 瓶子 里 装满 了 油 ， 倒 出 油 的 (3/5) 后 ， 还 剩下 (3/2) 千克 ， 这个 瓶子 能 装 多少 千克 油 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22875", "content": "一 条 河 的 横截面 是 一个 梯形 ， 梯形 的 上 底 是 3 米 ， 下 底 是 10 米 ， 高 是 2 米 ， 求 这个 梯形 横截面 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13981", "content": "一 根 电线 长 100 米 ， 减去 它 的 (1/5) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10443", "content": "幸福 小区 有 15 幢 楼房 ， 一共 有 居民 1620 户 ， 这个 小区 平均 每 幢 楼房 有 居民 多少 户 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5278", "content": "一 个数 的 (3/5) 是 27 ， 这个 数 的 (4/9) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5022", "content": "某 水泥厂 计划 生产 水泥 1200 吨 ， 实际 生产 了 2000 吨 ， 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13873", "content": "学校 买来 一批 书 ， 其中 科技 书 239 本 ， 故事书 的 册数 比 科技 书 的 3 倍 少 170 本 ． 故事书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2669", "content": "队员 去 果园 摘 桃子 ． 我们 小组 5 名 队员 ， 每人 摘 20 个 桃子 ． 另外 小队 4 名 队员 共 摘 62 个 桃子 ． 他们 平均 每人 摘 多少 个 桃子 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19287", "content": "一 个 圆锥 的 体积 是 36 dm ^ 3 ， 它 的 底 面积 是 18 dm ^ 2 ， 它 的 高 = 多少 cm ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23115", "content": "蜂鸟 是 目前 世界 上 所 发现 的 最小 的 鸟 ， 它 (5/6) 分钟 可以 飞行 (1/4) km ． 蜂鸟 平均 每分钟 可以 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16685", "content": "在 一次 为 贫困生 捐款 活动 中 ， 小海 捐款 8 元 ， 小 英 捐款 10 元 ， 小 英 捐款 是 小海 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18924", "content": "280 里面 有 多少 个 40 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21467", "content": "甲乙 两车 从 相距 240 千米 的 两地 同时 同 向 而 行 ， 甲 车 在 前 ， 每 小时 行驶 67 千米 ； 乙 车 在 后 ， 每 小时 行驶 82 千米 ， 乙 车 追 上 甲 车 需要 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12529", "content": "育才 小学 有 一批 同学 参加 夏令营 活动 ， 无论是 7 人 编 一组 ， 还是 8 人 编成 一组 都 正好 无 剩余 ， 参加 夏令营 至少 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1740", "content": "学校 图书室 有 15 个 书架 ， 每个 书架 有 6 层 ， 每层 放 170 本书 ， 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21851", "content": "9 寨 沟 最大 的 湖 是 长海 ， 长 8000 米 ， 比 最 宽 处长 (9/11) ， 它 的 最 宽 处 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21765", "content": "有 一堆 54.6 吨 的 黄沙 ， 用 装载量 为 1.8 吨 的 拖拉机 来 运 ， 已经 运走 25.8 吨 ， 余下 的 黄沙 还要 几次 运 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1534", "content": "有 一堆 糖果 ， 其中 奶糖 占 45% ， 再 放入 16 块 水果糖 后 ， 奶糖 就 只 占 25% ． 那么 ， 这 堆 糖 中 有 奶糖 多少 块 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22927", "content": "一 块 地 ， 其中 (5/12) 种 黄瓜 ， (1/10) 种 西红柿 ， 其余 种 茄子 ． 种 茄子 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4750", "content": "小 亮 吃 了 一盒 蛋糕 的 (1/5) ， 爸爸 吃 了 这 盒 蛋糕 的 (2/5) ， 两 人 一共 吃 了 这 盒 蛋糕 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3142", "content": "一 本书 ， 已经 看 了 (3/5) ， 还 剩 30 页 ， 则 这本 数 的 页数 为 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15726", "content": "一 辆 快车 和 一辆 慢车 同时 从 甲乙 两地 相向 而 行 ， 3 小时 后 相遇 ， 快车 距 乙地 还有 全程 的 (1/4) ， 慢车 距 甲地 还有 192 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17845", "content": "一 种 服装 原价 105 元 ， 现在 降价 (2/7) ， 现在 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15825", "content": "有 一堆 重 3800 千克 的 小麦 ， 每 35 千克 装 一袋 ， 袋子 装完 后 还 剩下 370 千克 ． 已经 装 好 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21883", "content": "把 一根 长 12 cm 的 木料 横 截 成 两个 小 长方体 ， 表面积 增加 了 6 cm ^ 2 ， 原来 这根 木料 的 体积 = 多少 cm ^ 3 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7602", "content": "某校 三年级 有 5 个 班 ， 每班 45 人 ， 二年级 的 人数 比 三年级 多 12 人 ， 二年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15919", "content": "上海 到 南京 的 公路 大约 有 300 千米 ， 一辆 汽车 从 上海 开往 南京 ， (2/3) 小时 后 离 南京 还有 240 千米 ． 照 这样 的 速度 ， 到 南京 还要 多长时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13411", "content": "80 与 40 的 和 除以 它们 的 差 ， 商 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11525", "content": "王奶奶 买 了 2.5 千克 香蕉 ， 交给 售货员 10 元 后 ， 找回 0.5 元 ， 每千克 香蕉 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17279", "content": "小 虎 家养 了 180 只 母鸡 ， 5 月份 下 了 450 个 蛋 ， 比 4 月份 多 下 了 36 个 ． 这 两个 月 一共 下 了 多少 个 蛋 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22149", "content": "a 、 b 两地 相距 600 千米 ， 一列 客车 和 一列 货车 同时 从 两地 相对 开出 ， 客车 平均 每 小时 行驶 65 千米 ， 货车 的 速度 是 客车 的 (11/13) ， 两车 几 小时候 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1759", "content": "有 500 千克 的 白菜 ， 上午 卖出 230 千克 ， 剩下 的 要 在 3 小时 之内 卖出 ， 平均 每 小时 卖 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21120", "content": "计算 ： 347 * 69 + 653 * 31 + 306 * 19 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "17938", "content": "制作 一节 圆柱形 通风管 ， 长 50 厘米 ， 底面 直径 是 20 厘米 ， 至少 需要 铁皮 多少 平方厘米 ？ ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10776", "content": "某 工程队 抢修 一条 长 17.4 千米 的 公路 ， 原 计划 12 天 完成 ， 结果 只用 8 天 就 完成 了 ， 平均 每天 比 原 计划 多 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10652", "content": "粮店 运 来 面粉 和 大米 各 800 袋 ， 面粉 每 袋 重 25 千克 ， 大米 每 袋 重 50 千克 ． 运 来 的 面粉 和 大米 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21299", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 全书 的 (1/5) ． 第 3 天 从 第 46 页 看 起 ， 这 本书 共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3725", "content": "向阳 小学 的 旗杆 插 在 地下 部分 是 1.09 米 ， 比 地上 部分 短 1.7 米 ， 这根 旗杆 一共 长 多少 米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "640", "content": "一年级 有 男生 126 人 ， 女生 112 人 ， 全校学生 是 一年级 学生 数 的 6 倍 ， 全校 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14029", "content": "舞蹈 小组 有 24 人 ， 舞蹈 小组 的 人数 比 音乐 小组 的 人数 少 (1/7) ， 音乐 小组 由 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15704", "content": "小 华 从 家 走 到 学校 ， 每分钟 走 60 米 ， 5 分钟 走 到 ． 如果 每分钟 走 50 米 ， 几分钟 能 走 到 学校 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8091", "content": "六年级 同学 参加 文艺 小组 的 有 35 人 ， 参加 数学 兴趣小组 的 人数 是 参加 文艺 小组 人数 的 3 倍 还 多 18 人 ， 参加 数学 兴趣小组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5407", "content": "一 辆 客车 从 甲地 开往 丙 地 ， 每 小时 行 80 千米 ， 要 6 小时 到达 ， 如果 需要 8 小时 到达 丙 地 ， 每 小时 要 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20814", "content": "李 阿姨 买 了 一件 标价 为 498 元 的 大衣 ， 正赶上 打 0.8 后 再 打 0.9 的 活动 ， 李 阿姨 付给 营业员 400 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4002", "content": "修路 队 修 一条 6.5 千米 长 的 公路 ， 已知 第一天 修路 1.94 千米 ， 比 第 二 天 多 修 0.66 千米 ． 两天 共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8361", "content": "小 明 骑车 从 家 到 书店 ， 平均 每分钟 行 320 米 ， 15 分钟 到达 ， 原 路 返回 只用 12 分钟 ， 平均 每分钟 行 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20694", "content": "在 “ 中小学生 阳光 体育 活动 ” 中 ， 五年级 3 班 的 同学 先 以 每分钟 0.18 千米 的 速度 跑 了 20 分钟 ， 又 以 每分钟 0.16 千米 的 速度 跑 了 30 分钟 ． 同学 们 在 这次 活动 中 跑步 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8752", "content": "小 军 身高 (3/2) 米 ， 爸爸 比 小 军 高 (11/50) 米 ， 爸爸 身高 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2393", "content": "某班 举办 数学 竞赛 ， 一共 20 道 题 ， 规定 答对 一 题 得 5 分 ， 答错 一 题 倒扣 2 分 ． 小 明 同学 得 了 86 分 ， 他 答对 了 多少 道 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21650", "content": "一 本书 ， 读完 它 的 (1/3) 比 读完 它 的 (2/5) 少 30 页 ， 这 本书 一共 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21781", "content": "甲乙 两列 火车 从 相距 1164 千米 的 两站 同时 相对 开出 ， 甲 车 每 小时 行 45 千米 ， 乙 车 每 小时 行 52 千米 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12369", "content": "一 列 火车 以 50 米 / 秒 的 速度 通过 一个 1720 米 的 山洞 ， 用 了 38 秒 ， 火车 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23065", "content": "甲 、 乙 两车 从 a 、 b 两地 相对 开出 1.2 小时 后 ， 两车 相距 435 千米 ， 照 同样 的 速度 ， 出发 4.2 小时 两车 相遇 ， a 、 b 两地 相距 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23039", "content": "一 捆 电线 长 100 米 ， 第一次 用 去 全长 的 (1/4) ， 第 二 次 用 去 全长 的 (2/5) ， 还 剩 多少 米 没有 用 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19995", "content": "学校 买 了 一些 作业本 ， 发给 12 个 班 ， 每班 130 本 ， 还 剩 30 本 ． 学校 共 买 了 多少 作业本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "646", "content": "甲 数 的 (3/4) 等于 乙 数 的 (2/5) ， 甲 数 是 80 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8092", "content": "东丽 公司 去年 上缴 国家 利税 880 万元 ， 今年 比 去年 增加 (1/11) ， 今年 上缴 国家 利税 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7626", "content": "红 彩带 长 8 厘米 ， 蓝 彩带 长 6 厘米 ， 蓝 彩带 是 红 彩带 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21917", "content": "一 种 冷藏车 的 车厢 是 长方体 ， 从 里面 量 长 3 米 ， 宽 2 米 ， 高 1.8 米 ． 如果 里面 食物 只 放到 一半 的 高度 ， 食物 的 体积 = 多少 立方米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4802", "content": "比 一个 数多 25% 的 数 是 30 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1151", "content": "甲乙 两城 相距 480 千米 ， 一辆 汽车 从 甲 城 到 乙 城 ， 原 计划 8 小时 到达 ， 实际 提前 2 小时 到达 ， 实际 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18834", "content": "客车 和 货车 分别 从 a 、 b 两站 同时 相向 开出 ， 相遇 后 两车 仍 按 原 速度 前进 当 它们 相距 196 千米 时 ， 客车 行 了 全程 的 80% ， 货车 已 行 的 路程 与 未 行 的 路 比 是 3 ： 2 ． 求 a 、 b 两站 间 的 路程 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "5910", "content": "学校 合唱队 ， 男生 比 女生 多 27 人 ， 男生 人数 是 女生 的 4 倍 ． 合唱队 里 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16049", "content": "一 个数 减去 13 以后 ， 比 56 与 38 的 差 多 512 ， 这个 数 = ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15970", "content": "比 24 的 (1/6) 多 5 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9772", "content": "小 青 这 学期 前几次 数学 测验 的 平均分 是 80 分 ， 最近 这次 测验 得 100 分 ， 平均分 提高 到 85 分 ． 那么 这次 测验 是 第 多少 次 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20897", "content": "一 辆 汽车 油箱 里 储油 102 升 ， 行使 了 56 千米 正好 耗油 8 升 ． 照 这样 计算 ， 剩下 的 油 还 可以 行使 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3179", "content": "商店 出售 一种 手机 ， 原价 520 元 ， 现在 打 0.9 出售 ， 现价 比 原价 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4241", "content": "运输 公司 运 玻璃 200 块 ， 每 运 一块 得 运费 0.6 元 ， 如果 打破 一块 除 不得 运费 外 ， 还 需要 赔偿 4 元 ． 结果 运 完 得 运费 106.2 元 ， 问 打破 了 几块 玻璃 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19197", "content": "佳佳 超市 新 进 5 箱 苹果 ， 每箱 25 千克 ， 新 进 的 桔子 是 苹果 的 2 倍 ， 苹果 和 桔子 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15860", "content": "希望 小学 去 植树 ， 三年级 植 了 150 棵 ， 四年级 植 的 是 三年级 的 2 倍 ， 五年级 植 的 比 3 四年级 的 总数 还 多 50 棵 ， 五年级 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22655", "content": "一 辆 汽车 (2/3) 小时 行驶 40 千米 ， 1 小时 可 行驶 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4462", "content": "某 饲养场 养鸡 14000 只 ， 鸭 的 只 数 是 鸡 的 (3/7) ， 养 的 鸡 和 鸭 一共 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1247", "content": "彤 彤 家 离 学校 840 米 ， 她 从 家 到 学校 要 12 分钟 ， 如果 她 用 同样 的 速度 从 家 到 图书馆 ， 用 了 18 分钟 ． 她家 离 图书馆 有 多 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7026", "content": "一 个数 的 (5/6) 是 120 ， 这个 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2518", "content": "水果店 运 来 2000 千克 的 水果 ， 已经 卖出 1520 千克 ， 剩下 的 4 天 卖完 ， 平均 每天 卖 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22165", "content": "欢欢 读 一本 故事书 ， 平均 每天 读 12 页 ， 读 了 15 天 ， 发现 还有 9 页 没 读 ， 这本 故事书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22135", "content": "装订 车间 计划 装订 9600 本书 ． 原 计划 每天 装订 480 本 ， 由于 改进 了 技术 ， 实际 每天 比 计划 多 装订 120 本 ， 这样 可以 提前 几天 完成 任务 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14256", "content": "修路 队 修 一条 公路 ， 计划 每天 修 86 米 ， 27 天 修 完 ． 实际 提前 3 天 完成 了 任务 ， 实际 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7284", "content": "时 风 牌 小 货车 的 载重量 是 2.4 吨 ， 解放牌 大 货车 的 载重量 是 时 风 牌 小 货车 的 2.5 倍 ， 两辆 货车 一齐 运 一次 货 ， 一共 可以 运货 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8609", "content": "歌剧院 楼上 有 210 个 座位 ， 比 楼下 少 518 个 座位 ， 这个 歌剧院 共 能 容纳 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18799", "content": "一 个 除法 算式 ， 除数 是 8 ， 商 是 16 ， 余数 是 2 ， 那么 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11660", "content": "一 件 上衣 原价 是 280 元 ， 现价 比 原价 降低 了 (3/7) ， 降低 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21704", "content": "筑路 队 铺 一条 路 ， 开始 每天 铺 400 米 ， 12 天 铺 了 这 条 路 的 一半 ． 以后 每天 多 铺 200 米 ， 恰好 在 计划 日期 内 完成 ， 原 计划 用 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19095", "content": "猪猪 同学 买 了 一个 二 手 的 电动玩具 车 ， 支付 了 电动玩具 车 原价 的 90% ， 没过几天 ， 他 的 朋友 羊 羊 看中 了 这个 电动玩具 车 ， 并且 表示 愿意 支付 高于 原价 25% 的 价格 购买 ． 猪猪 答应 了 ， 只 需要 一 转手 ， 猪猪 就 可以 赚 70 元 ． 那么 这个 电动玩具 车 的 原价 = 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18150", "content": "小强 有 336 张 卡片 ， 插 在 8 本 集 卡 册 里 ， 每 本 集 卡 册 大约 插 多少 张 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12300", "content": "已知 两个 因数 的 积 是 (8/15) ， 其中 一个 因数 是 (8/9) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18306", "content": "公司 要 装配 一批 计算机 ， 前 8 天 装配 120 台 ， 照 这样 速度 ， 再 装配 24 天 才能 完成 任务 ． 公司 一共 要 装配 多少 台 计算机 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21553", "content": "乐乐 步行 的 速度 是 54 米 / 分 ， 他家 到 学校 的 路程 约 918 米 ， 他 上学 需要 走 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21010", "content": "一 本书 有 144 页 ， 小 亚 看 了 4 天 ， 还 剩 36 页 没 看 ． 她 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16965", "content": "一 种 大豆 (3/4) 千克 可 榨油 (1/5) 千克 ． 照 这样 计算 ， 多少 千克 的 大豆 可 榨 8 千克 的 油 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "663", "content": "植物园 门票 5 元 / 人 （ 参观 花展 的 另加 3 元 ） ． 我们 班 去 了 28 人 ， 在 植物园 共 消费 188 元 ， 你 知道 有 多少 人 参加 了 花展 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14536", "content": "王大爷 有 一块 (7/8) 公顷 的 玉米地 ， 第一天 耕 了 一些 ， 还 剩 (2/3) 没有 耕 完 ， 已经 耕 了 这块 地 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15358", "content": "黑天鹅 有 28 只 ， 白天鹅 的 只 数 比 黑天鹅 的 3 倍 多 9 只 ． 白天鹅 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21596", "content": "在 路 的 一侧 插 彩旗 ， 每隔 5 米 插 一面 ， 从 起点 到 终点 共 插 了 10 面 ． 这 条 道路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11070", "content": "胜利 粮店 运进 一批 面粉 ， 卖出 560 千克 ， 剩下 的 是 卖出 的 3 倍 ， 这 批 面粉 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21580", "content": "小叶 看 一本 故事书 ， 已经 看 了 (4/7) ， 正好 看 了 52 页 ， 这 本书 一共 有 多少 页 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8513", "content": "六年级 有 3 个 班 ， 共 162 人 ， 其中 会 游泳 的 占 (2/3) ， 平均 每班 有 多少 人 会 游泳 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21693", "content": "某 蔬菜 店 运 来 410 千克 白菜 ， 第一天 卖出 152 千克 ， 第 二 天 卖出 174 千克 ， 一共 卖出 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20216", "content": "6 （ 1 ） 班 的 学生 用 长 18 米 的 彩带 做 了 一些 花 ， 每 朵花 用 (3/5) 米 的 彩带 ， 他们 送给 幼儿园 24 朵 ， 还 剩下 几朵 花 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14869", "content": "松树 有 60 棵 ， 比 杨树 多 (1/4) ， 杨树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "485", "content": "快车 和 慢车 同时 从 甲地 出发 开往 乙地 ， 慢车 每 小时 行 50 千米 ， 经过 3.5 小时 两车 相距 56 千米 ， 快车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7403", "content": "英才 学校 数学 兴趣小组 有 18 名 男生 ， 女生 人数 比 男生 人数 的 (1/3) 还 多 4 人 ， 数学 兴趣小组 一共 有 多少 名 学生 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18510", "content": "甲 、 乙 两地 相距 500 千米 ， 客车 和 货车 同时 从 两地 相对 开出 ， 客车 每 小时 行 36 千米 ， 3 小时 后 ， 两车 所 行 路程 正好 是 全程 的 (9/20) ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10886", "content": "一 本书 104 页 ， 小 军 看 了 19 页 ， 剩下 的 要 在 5 天 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8976", "content": "一 台 复读机 的 售价 是 128 元 ， 一台 彩色 电视机 的 售价 是 复读机 的 16 倍 ， 彩色 电视机 的 售价 比 复读机 贵 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13608", "content": "在 一条 马路 的 一侧 每隔 4 米 栽 一棵树 ， 一 共用 了 86 棵 树苗 ， 那么 这 条 公路 共有 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12509", "content": "有 5 筐 苹果 ， 从 每 筐 中 取出 12 千克 ， 剩下 的 苹果 正好 可以 装 2 筐 ． 原来 每 筐 苹果 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12254", "content": "73 的 4 倍 - 136 与 98 的 和 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3373", "content": "学校食堂 有 大米 若干 千克 ． 第一天 用 去 了 29.8 千克 ， 第 二 天 用 去 了 30.2 千克 ， 这时 还 剩下 56.9 千克 ． 学校食堂 原来 有 大米 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12401", "content": "在 一次 植树 活动 中 ， 六年级 与 五年级 植树 棵 数 的 比 是 8 ： 5 ， 已知 五年级 比 六年级 少 植树 21 棵 ， 两个 年级 一共 植树 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22039", "content": "龟 兔 赛跑 ， 全程 200 米 ， 龟 每分钟 跑 2.5 米 ， 兔 每分钟 跑 32 米 ， 兔 自以为是 ， 在 途中 睡 了 一 觉 ， 当 龟 到达 终点 时 ， 兔子 离 终点 还有 40 米 ， 兔子 在 途中 睡 了 几分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15775", "content": "水果店 买进 橘子 150 千克 ， 比 苹果 的 75% 还 少 30 千克 ． 水果店 买进 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3616", "content": "中国 古代 的 “ 黑火药 ” 配制 中 硝酸钾 、 硫磺 、 木炭 的 比例 为 15 ： 2 ： 3 ． 今 有 木炭 50 千克 ， 要 配制 “ 黑火药 ” 1000 千克 ， 还 需要 木炭 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8753", "content": "一 盒 糖 共有 9 千克 ， 用 11 个 袋子 来 装 ， 平均 每个 袋子 装 (3/4) 千克 ． 这 盒 糖 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14197", "content": "客车 和 货车 的 速度 比 是 9 ： 7 ． 两车 同时 分别 从 甲乙 两地 出发 ， 相向 而 行 ， (3/4) 小时 相遇 ． 如果 两车 同时 分别 从 甲乙 两地 出发 ， 同时 而 行 ， 客车 追 上 货车 需要 多少 小时 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9983", "content": "小 红 今年 （ 2000 年 ） 是 12 岁 ， 那么 她 = 多少 年 出生 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19864", "content": "彭 老师 需要 批改 58 篇 作文 ， 批改 了 5 天 后 ， 还 剩下 8 篇 ． 彭 老师 平均 每天 批改 作文 多少 篇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14534", "content": "一 个 水桶 里面 装有 水 ， 连 桶 重 5 千克 ， 把 水 加 到 原来 的 4 倍 ， 连 桶 重 11 千克 ， 原来 桶 里 有 多少 千克 水 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11463", "content": "一 项 工程 ， 甲 需要 8 天 才能 修 完 ． 如果 甲 修 了 3 天 ， 还 剩下 50 米 ． 甲 已经 修 了 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17770", "content": "学校 原有 少先队员 400 人 ， 现在 增加 了 (3/25) ． 现在 有 少先队员 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6349", "content": "一 个 平行四边形 ， 面积 是 63 ㎡ ， 底 是 9 米 ， 高 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5959", "content": "一 套 服装 的 成本 是 110 元 ， 由于 扩大 规模 ， 每套 服装 成本 降低 了 20% ， 现在 的 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "670", "content": "修 一条 4 千米 长 的 水渠 ， 5 天 修 完 ， 平均 每天 修 这 条 水渠 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18387", "content": "沛县 电风扇 厂 今年 计划 生产 风扇 15000 台 ， 已经 生产 了 8480 台 ， 余下 的 要 40 天 完成 ， 平均 要 生产 多少 台 风扇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17386", "content": "希望 小学 六年级 共有 144 名 学生 ， 男同学 和 女同学 的 人数 比 是 5 ： 4 ． 希望 小学 六年级 有 女生 多少 名 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17263", "content": "某 商店 购进 100 支 钢笔 ， 每支 5 元 ， 卖出 时 每支 6 元 ， 那么 至少 卖出 多少 支 ， 除 收回 成本 外 ， 还 赚 得 40 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20362", "content": "儿童公园 共有 各种 观赏树木 1356 棵 ， 其中 有 50% 是 樟树 ， 有 (1/6) 是 桂花树 ， 有 (1/4) 是 玉兰树 ， 剩下 的 是 其它 树种 ． 其它 树种 共有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18846", "content": "一 种 商品 打 0.75 后 售价 120 元 ， 商品 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6618", "content": "五年级 （ 2 ） 班 准备 了 12 个 节目 ， 最后 有 6 个 节目 被 选中 参加 学校 表演 ， 参加 表演 的 节目 占 该班 所有 准备 节目 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12400", "content": "6 （ 1 ） 班 有 男生 25 人 ， 女生 20 人 ， 多少 ？ （ 补充 问题 并 解答 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19918", "content": "某校 有 男生 392 人 ， 比 女生 少 105 人 ， 这个 学校 有 学生 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4069", "content": "王 伯伯 批发 了 18 筐 黄瓜 ， 每 筐 23 千克 ， 已 卖出 了 200 千克 ． 还 剩下 多少 千克 黄瓜 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2547", "content": "有 红 、 黄 、 蓝 、 绿 、 白 5 种颜色 的 球 各 5 个 ， 至少 取 多少 个 球 ， 可以 保证 有 两个 颜色 相同 的 球 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3838", "content": "停车场 有 24 辆 汽车 ， 其中 小汽车 有 6 辆 ， 其余 的 是 大 汽车 ． 大 汽车 是 小汽车 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20443", "content": "我们 生物 小组 只 种 了 200 株 向日葵 ， 每株 可 收 葵花籽 0.32 千克 ， 如果 每千克 葵花籽 可以 榨油 0.21 千克 ， 那 我们 收 的 葵花籽 大约 可以 榨油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15041", "content": "小 明 看 一本 故事书 ， 3 天 看 了 45 页 ， 照 这样 计算 ， 再 看 5 天 就 正好 看 完全 书 ． 这本 故事书 有 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12403", "content": "找 规律 填 数 ． 1 、 3 、 9 、 27 多少 、 243 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13630", "content": "白兔 的 只 数 比 黑 兔 的 (1/3) 少 30 只 ， 白兔 有 120 只 ， 黑 兔 有 多少 只 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11225", "content": "6 ： 7 的 后 项 扩大 3 倍 ， 要 使 比值 不变 ， 前项 应 加上 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19336", "content": "李 军 买 3 本 双行 本 和 2 本 英语 本 ． 买 双行 本 用 了 2.25 元 ， 买 英语 本 用 了 0.96 元 ． 每 本 双行 本 比 英语 本 贵 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11149", "content": "同样 的 方砖 铺 地 ， 铺 18 平方米 用 砖 144 块 ， 现有 840 块 方砖 可 铺 地 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6961", "content": "我校 有 女生 180 人 ， 比 男生 的 (4/5) 多 44 人 ， 我校 有 学生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6584", "content": "果园 里 收 苹果 600 千克 ， 先 装 了 4 筐 ， 每 筐 装 25 千克 ， 照 这样 计算 ， 余下 的 还要 装 几 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1743", "content": "在 20 米 的 校园 小道 一边 种 柳树 ， 每隔 4 米 种 一棵 ， 两端 都 种 ， 一共 要 种 几棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5780", "content": "学校 图书馆 买来 一批 新书 ， 《 百科知识 》 定价 是 19.80 元 ， 《 童话故事 》 定价 是 16.20 元 ， 两种 书 各 买 25 本 ， 一 共用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11564", "content": "学校 进行 广播操 比赛 ， 有 18 个 班 参加 ， 每个 班 排成 4 组 ， 每组 有 12 人 ， 一共 有 多少 名 学生 参加 广播操 比赛 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13144", "content": "一 个数 减去 30 ， 差 是 40 这个 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19994", "content": "学校 举行 手抄报 比赛 ， 六年级 上交 60 件 作品 ， 五年级 比 六年级 多 交 (1/5) ． 五年级 交 了 多少 件 作品 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2600", "content": "同学 们 练 团体操 ， 每行 20 人 ， 可 站 15 行 ． 如果 每行 多 站 5 人 ， 看 站 多少 行 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20021", "content": "两个 因数 的 积 是 24.8 ， 一个 因数 是 0.62 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11537", "content": "小 东 计划 把 自己 积蓄 的 3000 元 钱 存入 银行 ， 存期 3 年 ， 准备 到期 后 把 税后 利息 （ 利息税 按 20% 计算 ） 捐献 给 贫困地区 的 “ 特困生 ” ， 如果 年利率 按 2.25% 计算 ， 到期 后 他 可以 捐出 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "19758", "content": "计算 ： （ 85 * 64 * 90 ） / （ 16 * 17 * 72 ） = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13759", "content": "把 0.1 平均 分成 10 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9670", "content": "要 架 一条 7200 米 长 的 电缆 ， 计划 12 天 完成 任务 ， 实际 9 天 就 完成 任务 ， 实际 每天 比 计划 每天 多 架设 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13178", "content": "张老师 买 了 5000 元 的 国家 建设 债券 ， 定期 3 年 ． 如果 年利率 是 2.98% ， 到期 时 张老师 可以 领取 的 利息 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "590", "content": "小 冬 家养 黑 兔 20 只 ， 相当于 白兔 只 数 的 (4/5) ， 小 冬 家养 白兔 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9406", "content": "英才 小学 买 了 一些 体育用品 ． 买 足球 用 去 了 138.60 元 ， 买 篮球 比 足球 多 花 了 13.20 元 ． 红星 小学 买 足球 和 篮球 共 花 了 多少 元 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23106", "content": "一 次 歌咏 比赛 ， 冠军 得 9.89 分 ， 亚军 得分 比 冠军 少 0.26 分 ． 亚军 的 成绩 = 多少 分 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16844", "content": "学校 买 回 5 个 篮球 和 6 个 足球 ， 每个 篮球 需要 50 元 ， 每个 足球 需要 40 元 ， 学校 买 篮球 和 足球 一 共用 去 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9709", "content": "学校 栽 了 684 棵 杨树 和 76 棵 松树 ， 栽 的 杨树 是 松树 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19566", "content": "洛阳市 一 建筑 工 司 7 月份 计划 为 四川 地震 灾区 再 安装 一批 活动 板房 ， 他们 上旬 完成 计划 的 (1/2) ， 中旬 完成 了 (3/7) ， 下旬 完成 了 450 套 ， 结果 超过 计划 的 (1/4) ， 建筑 公司 原 计划 安装 活动 板房 多少 套 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20383", "content": "一 辆 汽车 每 小时 行 67 千米 ， 小 明 从 家 到 书店 是 268 千米 ． 小 明 坐 汽车 到 书店 需 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11773", "content": "妈妈 去 超市 买 了 6 瓶 黄酒 和 3 瓶 可乐 ， 共用 去 123 元 ， 已知 可乐 每瓶 5 元 ， 黄酒 每瓶 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5927", "content": "学校 买 了 一捆 电线 ， 第一次 用 去 了 全长 的 40% ， 第 二 天 用 去 了 全长 的 45% ， 两次 共用 去 85 米 ， 这 捆 电线 共 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21493", "content": "某 工厂 原 计划 每天 烧 16 吨 煤 ， 存 煤 够 烧 35 天 ． 实际 每天 烧 的 吨数 是 原 计划 的 (7/8) ， 实际 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22443", "content": "一 根 绳子 长 10 米 ， 剪 去 4 米 ， 还 剩下 这根 绳子 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9493", "content": "某 工厂 要 加工 一批 零件 ， 原 计划 每天 加工 160 个 零件 ， 24 天 加工 完 ． 实际 每天 加工 192 个 零件 ， 照 这样 的 效率 多少 天 可以 加工 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18778", "content": "学校 买 回 18 包 《 小学生 天地 》 ， 每包 20 册 ， 每册 1.45 元 ， 一 共用 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20593", "content": "一 个数 既有 因数 3 ， 又 有 因数 4 ， 这个 数 最小 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21865", "content": "甲乙 两 人 共同 生产 一批 零件 ， 甲 每 小时 生产 30 个 ， 乙 每 小时 生产 36 个 ， 5 小时 后 ， 这 批 零件 全部 生产 完 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11210", "content": "一 种 服装 原价 170 元 ， 现在 降价 (1/5) ． 现在 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12752", "content": "小 明 有 零花钱 64 元 ， 正好 是 小 红 的 (8/9) ， 小 红 有 多少 零花钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4758", "content": "一 件 衬衣 打 0.9 后 是 108 元 ， 这件 衬衣 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18324", "content": "一 堆 煤 共 10 吨 ， 5 月份 用 去 15% ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6368", "content": "小 明 家 买来 60 千克 大米 ， 吃 了 它 的 (5/6) ， 还 剩 多少 千克 大米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8946", "content": "一 个数 的 (2/5) 与 6 的 和 是 30 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17927", "content": "学校 举办 美术 作品展览 ． 绘画 作品 有 80 件 ， 比 书法作品 少 (2/7) ． 书法作品 有 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18803", "content": "36.54 / 1.3 = 28.1 … 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19505", "content": "甲 、 乙 两地 相距 120 千米 ， 一辆 客车 和 一辆 货车 分别 同时 从 甲 、 乙 两地 相对 开出 ， (4/5) 小时 相遇 ， 已知 客车 每 小时 行 80 千米 ， 求 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22855", "content": "一 个 工厂 今年 第一季度 计划 完成 产值 8000 万元 ， 实际 完成 产值 8600 万元 ， 超额完成 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19666", "content": "计算 ： (3/4) / [ ( (4/5) + (1/4) ) * (3/7) ] = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12394", "content": "500 元 压岁钱 在 银行 存 一年 利息 是 12.60 元 ， 年利率 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14388", "content": "小 明 家养 的 鸡 是 鸭 的 4 倍 ， 养鸭 45 只 ， 鸡 和 鸭 一共 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2831", "content": "某 商品房 ， 分期付款 比 定价 多付 5% ， 王 叔叔 细算 后 ， 发现 分期付款 要 21 万元 ， 这 套 商品房 定价 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1524", "content": "一 个 电饭煲 现价 140 元 ， 比 原价 便宜 了 60 元 ， 便宜 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11364", "content": "从 北京 到 上海 的 铁路 长 约 1464 千米 ， 现在 一列 火车 已 走 了 648 千米 ， 如果 这 列 火车 每 小时 行 68 千米 ， 还有 几小时 火车 到达 终点 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9123", "content": "小 红 计划 每星期 （ 7 天 ） 练 700 个 汉字 ， 实际 每天 练 120 个 字 ， 实际 每星期 比 计划 多 练 几个 字 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5778", "content": "20 颗 草莓 ， 每 4 颗 一袋 ， 可以 装 多少 袋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11674", "content": "油菜籽 的 出油率 是 42% ， 300 千克 的 油菜籽 可以 榨出 多少 千克 的 油 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20939", "content": "大楼 共有 216 级 台阶 ， 如果 每 两层楼 之间 都 是 18 级 台阶 ， 大楼 共有 多少 层 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1356", "content": "谢 叔叔 带 1000 元 钱 买 大米 ． 买 了 24 袋 ， 还 剩 400 元 ． 每 袋 大米 = 多少 元 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22103", "content": "同学 们 做 红花 208 朵 ， 黄花 167 朵 ． 做 绿 花 的 朵 数 比 红花 和 黄花 的 总数 少 59 朵 ． 做 绿 花 多少 朵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2088", "content": "某班 有 学生 45 人 ， 全部 参加 了 课外 兴趣小组 ． 参加 体育组 的 占 总 人数 的 (2/5) ， 参加 音乐 组 的 占 总 人数 的 (1/3) ， 其余 的 参加 了 美术 小组 ． 参加 美术 小组 的 占 总 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10065", "content": "某 热电厂 运进 54 吨 煤 ， 第一天 用 去 24 吨 ， 第 二 天 用 去 剩下 的 (2/3) ， 两天 共用 去 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4331", "content": "小 华 买 了 5 本书 ， 一共 付 了 30 元 ， 找回 2.5 元 ， 每 本书 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12470", "content": "百货商店 卖出 4 箱 暖瓶 ， 每箱 8 个 ， 一共 卖 了 320 元 ． 每个 暖瓶 的 价钱 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9496", "content": "学校 买 了 3 箱 小 排球 ， 每箱 12 个 ， 一 共用 去 1080 元 ． 每个 小 排球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13903", "content": "小 珍 每天 步行 上学 ， 速度 是 3.6 千米 / 小时 ， 她 从 家 出发 0.25 小时 后 到达 学校 ： 她家 到 学校 的 路程 = 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5962", "content": "小 王 要 完成 一项 90 页 书 的 录入 任务 ， 第一天 录 了 它 的 (1/5) ， 第 二 天 录 了 剩下 的 (1/3) ， 还 剩 多少 页 没有 录入 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16219", "content": "乐乐 有 邮票 80 张 ， 比 欢欢 的 (2/3) 少 4 张 ， 欢欢 有 邮票 多少 张 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13463", "content": "长途客车 每 小时 行 63 千米 ， 从 甲 城 到 乙 城 用 了 15 小时 ． 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "911", "content": "601 班 男生 人数 比 女生 多 (1/6) ， 女生 30 人 ， 全班 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22473", "content": "同时 含有 因数 2 、 3 、 5 的 最小 两位数 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12275", "content": "一 个数 的 (3/4) 是 60 ， 这个 数 的 (4/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5342", "content": "6 （ 二 ） 班 男生 人数 是 女生 人数 的 (2/3) ， 全班 有 45 人 ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18187", "content": "一 条 猎犬 追捕 野兔 ． 野兔 如果 返回 80 步 ， 就 到达 猎犬 所在地 ． 已知 在 猎犬 跑 2 步 的 时间 内 野兔 跑 3 步 ； 而 猎犬 跑 4 步 的 路程 等于 野兔 跑 7 步 的 路程 ． 那么 ， 猎犬 跑 多少 步 才能 捕获 野兔 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17452", "content": "学校 美术 小组 一共 有 36 个 同学 ， 其中 有 女同学 27 人 ． 女同学 人数 是 男同学 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1384", "content": "哥哥 给 了 弟弟 2 支 铅笔 后 还 剩 5 支 ， 这时 两 人 的 铅笔 一样 多 ， 弟弟 原来 有 铅笔 多少 支 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19926", "content": "工程队 修 一段 公路 ， 已 完成 任务 的 (5/8) ， 余下 (24/5) km 未 完成 ， 这 段 路 长 多少 km ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17448", "content": "计算 ： 150 / 〔 （ 83 * 7 - 90 / 15 ） / 23 * 8 〕 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15164", "content": "在 一次 跳高 比赛 中 ， 小 明 跳 了 1.16 米 ， 小 刚 比 小 明 多 跳 了 0.24 米 ， 小 星 比 小 刚 少 跳 了 0.18 米 ． 小 星 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1703", "content": "修路 队 18 天 修 了 2970 米 路 ， 照 这样 计算 ， 40 天 才能 完成 任务 ， 请问 修路 队 一共 要 修 多少 米 的 路 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16475", "content": "某 款 书包 打 0.8 后 售价 是 120 元 ， 如果 打 0.9 出售 ， 这 款 书包 需要 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5907", "content": "小 方 看 一本 548 页 的 书 ． 第一天 看 了 146 页 ， 第 二 天 看 了 207 页 ． 这 本书 还有 多少 页 没 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6805", "content": "一 本 图书 原价 18 元 ， 现在 打 0.7 出售 ， 现在 卖 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22200", "content": "一 种 “ 文曲星 ” 电子词典 的 现价 是 140 元 ， 比 原价 降低 了 12.5% ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22955", "content": "一 种 双层 列车 一共 有 15 节车厢 ， 每 节车厢 的 上层 有 104 个 座位 ， 下层 有 76 个 座位 ． 这种 双层 列车 每次 可 载客 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20257", "content": "某 数 的 (1/3) 是 18 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10539", "content": "一 个 计算器 的 价格 为 72 元 ， 一台 洗衣机 的 价格 是 它 的 25 倍 ， 一台 洗衣机 的 价格 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10080", "content": "服装厂 用 一批 布料 裁制 套装 ． 按 原来 的 剪裁 方法 可以 制成 140 套 ， 平均 每套 用布 2.7 米 ． 实际 剪裁 时 多 做 了 10 套 ， 实际 每套 用布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22943", "content": "甲 、 乙 两地 相距 480 千米 ， 货车 从 甲地 开往 乙地 ， 每 小时 行 60 千米 ， 客车 从 乙地 开往 甲地 ， 每 小时 行 80 千米 ． 货车 出发 1 小时 后 客车 才 出发 ， 还要 几小时 两车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18970", "content": "小花 一年 前 把 节省 的 零用钱 存入 银行 ， 年利率 是 3.78% ， 一年 后 小花 共 得 本金 和 利息 207.56 元 ， 一年 前 小花 在 银行 存 了 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4957", "content": "食堂 运 来 大米 0.9 吨 ， 运 来 的 面粉 比 大米 重量 的 3 倍 少 0.5 吨 ． 食堂 运 来 面粉 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19723", "content": "依法 纳税 是 每个 公民 的 义务 ． 孙 老师 月 收入 2400 元 ， 按照 个人所得税 征收 标准 ， 孙 老师 上 月 应 缴纳 个人所得税 多少 元 ？ （ 个人所得税 按 1% ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3590", "content": "果园 里 有 桃树 106 棵 ， 梨树 的 棵 数 是 桃树 的 4 倍 ， 梨树 和 桃树 一共 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10312", "content": "2010 年 上海 世博会 平日 票 有 普通 票 和 优惠 票 两种 ， 优惠 票 价格 为 90 元 ， 比 普通 票 便宜 40% ， 普通 票 价格 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12582", "content": "车站 有 一批 货物 ， 第一次 运走 全部 货物 的 (1/3) ， 第 二 次 运走 全部 货物 的 (3/4) 少 16 吨 ， 这时 正好 全部 运 完 ， 这 批 货物 一共 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19743", "content": "一 堆 煤 重 (9/10) 吨 ， 运走 了 (3/5) ， 还有 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6287", "content": "李师傅 加工 一批 零件 ， 已 加工 与 未 的 个数 比 是 1 ： 3 ， 再 加工 400 个 后 ， 已 加工 的 占 总数 的 (1/3) ， 这 批 零件 有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11447", "content": "一 名 成年人 身上 的 血液 约 占 体重 的 (1/4) ， 体重 65 千克 的 人 ， 血液 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9059", "content": "某 车间 有 工人 28 人 ， 其中 男 职工 12 人 ， 后来 又 调进 多少 名 女职工 ， 这时 女职工 占 总 人数 的 (3/5) ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15457", "content": "菜场 运 来 一些 新鲜 蔬菜 ， 其中 萝卜 占 这 批 蔬菜 的 (1/5) ， 青菜 占 这 批 蔬菜 的 35% ． 已知 青菜 比 萝卜 多 450 千克 ， 这 批 蔬菜 一共 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14056", "content": "100 / 103 与 99 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5793", "content": "商店 有 58 筐 苹果 ， 卖出去 500 千克 后 ， 还 剩 8 筐 ， 每 筐 苹果 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6159", "content": "李老师 每天 早上 要 跑步 48 分钟 ， 他 的 速度 是 85 米 / 分 ， 李老师 每天 早上 大约 跑步 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23000", "content": "两 数 相除 商 是 4 ， 余数 是 17 ， 被除数 、 除数 、 商 和 余数 的 和 是 673 ， 被除数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "16143", "content": "一 列 火车 从 甲地 开往 相距 600 千米 的 乙地 ， 3 小时 行 了 150 千米 ， 照 这样 计算 ， 这 列 火车 还要 行 多少 小时 才能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13853", "content": "1 米 的 (1/5) 与 多少 米 的 (1/10) 一样 长 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19650", "content": "少先队员 种 一批 树苗 ， 已经 种 了 (2/5) ， 还 剩 420 棵 没有 种 ， 这 批 树苗 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21200", "content": "公园 里 有 银杏树 80 棵 ， 柳树 的 棵 数 是 银杏树 的 8 倍 ， 柳树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6772", "content": "今年 6 月 ， 我 县 沙洲 乡 遭受 巨大 的 洪灾 ， 全县 各 小学 纷纷 伸出 援助 之 手 ， 尧 婕 同学 想 从 邮局 向 沙洲 中心小学 贫困生 汇 600 元 人民币 ， 邮局 汇款 汇率 为 1% ， 那么 尧 婕 同学 将 在 这次 献爱心 活动 中共 花费 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15250", "content": "一 个 正方体 的 6 个 面上 ， 有 1 个 面上 写 “ a ” ， 2 个 面上 写 “ b ” ， 3 个 面上 写 “ c ” ． 任意 抛 这个 正方体 ， 字母 “ c ” 朝 上 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1161", "content": "小 红 体重 42 千克 ， 小 云 体重 40 千克 ， 小 新 的 体重 相当于 小 红 和 小 云 体重 总和 的 (1/2) ． 小 新 体重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19114", "content": "有 一个 除法 算式 ， 被除数 是 219 ， 小马 错 将 被除数 当作 291 来 计算 ， 结果 商 增加 4 ， 余数 没有 变 ， 则 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2935", "content": "希望 小学 二年级 有 学生 45 人 ， 三年级 有 学生 56 人 ， 四年级 学生 是 二 、 三年级 学生 总数 的 2 倍 ， 四年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21599", "content": "六年级 某班 某 天 有 116 名 学生 出勤 ， 3 名 学生 病假 ， 1 名 学生 事假 ． 出勤 的 学生 人数 占 全班 总 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12217", "content": "六年级 有 138 名 学生 ， 其中 有 (5/6) 的 学生 订 了 《 智力 》 ， 有 (2/3) 的 学生 订 了 《 科学 画报 》 ． 这 两种 读物 都 订 的 至少 有 几名 学生 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7502", "content": "用 60 厘米 的 铁丝 围成 一个 三角形 ， 这个 三角形 3 条 边 的 长度 比 是 4 ： 5 ： 6 ， 则 最长 的 边 = 多少 厘米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15015", "content": "动物园 里 有 150 只 白天鹅 ， 黑天鹅 的 只 数 是 白天鹅 的 8 倍 ， 黑天鹅 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11191", "content": "某 饲养场 养鸭 450 只 ， 是 鸡 的 150% ． 养 鹅 只 数 是 鸡 的 15% ， 该 饲养场 养 鹅 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20337", "content": "把 (6/7) 平均 分成 4 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21812", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 45 千米 ， 正好 行 了 全程 的 60% ， 这辆 汽车 到达 乙地 还要 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16177", "content": "为了 帮助 贵州 贫困山区 的 小朋友 们 ， 青江 小学 开展 义卖 活动 ． 六年级 义卖 所得 的 钱 数 是 600 元 ， 比 五年级 多 100 元 ． 六年级 比 五年级 多几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22594", "content": "一 个数 除以 8 ， 商 是 60 ， 余数 是 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5541", "content": "某 商店 一共 有 200 辆 电动车 ， 卖出 (7/10) ， 还 剩 多少 辆 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5503", "content": "实验 小学 绿色 书屋 去年 有 图书 4800 册 ， 今年 图书 册数 比 去年 增加 了 (3/10) ， 今年 有 图书 多少 册 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6513", "content": "小 星 和 小 明 同时 从 广场 向 少年宫 走 去 ， 小 星 每分钟 走 60 米 ， 小 明 每分钟 走 64 米 ． 经过 6 分钟 ， 小 明 到 了 少年宫 ， 这时 小 星 离 少年宫 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17124", "content": "小 玲 参加 数学 竞赛 ， 全卷 总 题 数 是 36 题 ， 小 玲 做 对 题 数 与 做 错题 的 比 是 7 ： 2 ． 小 玲 做 错 了 多少 题 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18428", "content": "在 一次 爬山 比赛 活动 中 ， 小 松 上山 时 每分钟 走 50 米 ， 18 分钟 到达 山顶 ， 然后 按 原 路 下山 ， 每分钟 75 米 ， 他 下山 需要 几分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15469", "content": "中心小学 六年级 共有 女生 96 人 ， 是 六年级 学生 人数 的 (8/15) ， 六年级 人数 是 全校 人数 的 (1/4) ， 金 佛寺 中学 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13117", "content": "商店 运 来 一些 水果 ， 卖出 的 比 它 的 (1/3) 少 2 千克 ， 比 它 的 (1/5) 多 4 千克 ． 商店 卖出 水果 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1185", "content": "甲 数 的 (1/3) 刚好 等于 乙 数 的 30% ， 已知 乙 数 是 60 ， 那么 甲 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3890", "content": "春运期间 ， 龙南 到 赣州 的 高速 班车 每 车 限 乘客 36 人 ， 18 辆 班车 可 乘客 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22174", "content": "123456 + 234567 + 345678 + 456789 + 567901 + 679012 + 790123 + 901234 = ．", "knowledge": ["+"], "difficulty": 0.6, "length": 15}
-{"question_id": "9432", "content": "甲乙 两站 的 公路 长 265 千米 ， 客车 以 每 小时 42 千米 的 速度 从 甲 站 开往 乙 站 ， 同时 货车 从 乙 站 向 甲 站 开出 ， 行 了 3 小时 ， 两车 还 相距 4 千米 ． 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13140", "content": "两个 工程队 共同 开凿 一条 117 米 长 的 隧道 ． 各 从 一端 相向 施工 ， 13 天 打通 ． 甲队 每天 开凿 4 米 ， 乙 队 每天 开凿 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20390", "content": "蔬菜 实验 基地 今年 共 收获 8 吨 蔬菜 ， 其中 黄瓜 的 重量 占 (2/5) ， 黄瓜 的 重量 是 茄子 的 (4/5) ， 今年 收 茄子 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11765", "content": "学校 图书馆 有 故事书 480 本 ， 是 文艺 书 的 3 倍 ， 文艺 书 有 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23121", "content": "绿地 小学 向 希望 小学 捐赠 了 故事书 352 本 ， 捐赠 的 科技 书 比 故事书 多 216 本 ， 如果 要 把 所有 的 书 装箱 ， 每 40 分装 一箱 ， 一共 要 装 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3010", "content": "8 和 6 的 和 除以 这 两个 数 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17866", "content": "学校食堂 有 一批 煤 ， 如果 每天 烧 50 kg 可以 烧 20 天 ， 后来 改进 炉灶 ， 每天 烧 的 煤 节约 了 20% ， 这 批 煤 可以 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15297", "content": "幼儿园 买 回 苹果 和 橘子 各 6 千克 ， 共用 去 22.8 元 ， 已知 苹果 每千克 2.5 元 ， 橘子 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20376", "content": "今年 某地 的 农业投入 比 去年 增加 300 万元 ， 增长 了 20% ． 去年 该地 的 农业投入 = 多少 万元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22556", "content": "华新 小学 的 6 个 年级 ， 每个 年级 有 7 个 班 ， 平均 每班 48 人 ． 这个 学校 共有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "894", "content": "两车 分别 从 a 、 b 两地 同时 相对 开出 ， 行驶 4 小时 后 ， 两车 已 交叉 而 过 并 又 相距 75 千米 ， 已知 甲乙 两车 每 小时 共 行驶 全程 的 (7/24) ， a 、 b 两地 相距 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10451", "content": "解放军 某部 行军 ； 队伍 以 每 小时 6 千米 的 速度 前进 ， 3 小时 后 ， 指导员 派 通讯员 骑 自行车 以 每 小时 15 千米 的 速度 追赶 队伍 ， 传达 上级指示 ， 通讯员 出发 后 几小时 可 追 上 队伍 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9898", "content": "按 规律 填 数 ： 1 ， 3 ， 6 ， 10 ， 15 ， 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "456", "content": "建筑工地 需要 54 吨 水泥 ， 先 用 拖拉机 运 16 次 ， 每次 运 1.5 吨 ， 剩下 的 改用 卡车 运 ， 每次 运 5 吨 ， 还要 运 多少 次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13545", "content": "学校 计划 绿化 一块 200 平方米 的 空地 ， 先 划出 总面积 的 (1/4) 种树 ， 剩下 的 按 2 ： 3 的 比例 种花 和 草 ， 种花 的 面积 有 多 大 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8794", "content": "超市 里 白糖 每千克 5.2 元 ， 绿豆 每千克 7.5 元 ， 妈妈 买 了 3 千克 白糖 ， 2 千克 绿豆 ， 一共 要 付 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10597", "content": "一 台 冰箱 原价 是 2500 元 ， 现在 削价 250 元 供应 ， 现价 是 原价 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5539", "content": "24 的 (2/3) 与 一个 数 的 40% 相等 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2029", "content": "学校 买 了 24 个 排球 ， 买 的 足球 是 排球 的 (5/4) ， 买 的 足球 和 排球 一共 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15939", "content": "比 18 多 60% 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12284", "content": "每 只 钢笔 15 元 ， 3 （ 9 ） 班 有 48 人 ， 每人 买 一只 钢笔 ， 给 售货员 阿姨 800 元 钱 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13671", "content": "校 图书馆 买 回 360 本 图书 ， 其中 文艺 书 占 (3/4) ， 文艺 书 买 回 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1130", "content": "在 圆形 操场 的 4 周 每隔 3 米 插 上 彩旗 ， 共 插 上 80 面 ， 这个 圆形 操场 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14209", "content": "便民 水果 超市 运进 一批 苹果 ， 第一天 卖出 苹果 总 质量 的 (1/4) ， 第 二 天 卖出 余下 的 (1/3) ， 第 3 天 卖出 余下 的 (1/2) ， 这时 ， 还 剩下 120 千克 ， 这 批 苹果 一共 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9162", "content": "一 列 火车 完全 通过 650 米 的 大桥 需要 17 秒 ， 火车 长 200 米 ， 火车 的 速度 是 每秒 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11069", "content": "(3/4) - (5/9) 与 (63/100) 的 积 ， 差 = ？ 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9985", "content": "红星 机床厂 上个月 计划 秤 机床 200 台 ， 实际 比 计划 多 生产 40 台 ， 实际 产量 是 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15946", "content": "张大妈 把 10000 元 存入 银行 ， 定期 3 年 ， 年利率 是 3.9% ， 到期 她 可以 取出 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9346", "content": "学校 计划 买 20 个 排球 ， 按 商场 价 计算 要 用 360 元 ； 现 决定 多 买 15 个 ， 那么 一共 需用 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21499", "content": "有 甲 、 乙 两个 粮仓 ， 甲 仓 原 存粮 480 吨 ， 如果 从 甲 仓 运 40% 到 乙 仓 ， 这时 两 仓 粮食 的 质量 相等 ． 那么 ， 乙 仓 原来 存粮 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "337", "content": "哥哥 上 大学 ， 要 坐 6.4 个 小时 的 火车 ， 火车 的 平均速度 是 70.5 千米 / 时 ． 他 坐火车 走 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3516", "content": "制作 一个 底面 直径 20 厘米 ， 长 50 厘米 的 圆柱形 通风管 ， 至少 要 用 多少 平方厘米 铁皮 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21900", "content": "一 本 集邮册 原价 120 元 ， 现在 按 原价 的 0.6 出售 ， 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9456", "content": "星期天 ， 小 明 陪 妈妈 到 超市 购物 ； 妈妈 买 水果 花 去 了 所 带 钱 的 (2/5) ， 买菜 又 花 去 了 余下 钱 的 (1/3) ， 买 完 这些 东西 后 还 剩下 20 元 钱 ， 妈妈 带 了 多少 元 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11324", "content": "从 甲地 到 乙地 ， 上坡路 占 (2/9) ， 平坦 路 占 (4/9) ， 其余 是 下坡路 ． 一辆 汽车 从 甲地 出发 ， 在 甲乙 两地 间 往返 一趟 ， 共 行 下坡路 25 km ． 求 甲乙 两地 的 路程 = 多少 km ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10932", "content": "园林 工人 在 一条 马路 的 一边 栽树 （ 包括 端点 ） ， 每 2 棵 树 之间 的 距离 是 4 米 ， 一共 栽树 86 棵 ， 这 条 马路 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15601", "content": "从 学校 到 少年宫 的 距离 是 2000 米 ， 小 敏 4 分行 了 320 米 ， 照 这样 的 速度 ， 小 敏 还要 几分 可以 到达 少年宫 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6486", "content": "光明 小学 去年 为 全校 400 名 学生 投保 “ 平安保险 ” ， 保险金额 每人 5000 元 ， 保险期限 一年 ． 按 年 保险费率 0.4% 计算 ， 去年 全校学生 共 应 缴纳 保险费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "521", "content": "一 段 公路 480 米 ， 已修 了 120 米 ， 剩下 的 每天 修 90 米 ， 还 需要 几天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20840", "content": "足球赛 门票 150 元 一张 ， 降价 后 观众 增加 了 (1/2) ， 收入 增加 了 (1/5) ， 一张 门票 降价 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9117", "content": "(12/13) - (2/91) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "470", "content": "有 两块 小麦 地 ， 第一块 地 收入 小麦 7436 千克 ， 第 二 块 地 比 第一块 地 少 收入 945 千克 ， 两块 地 共 收入 小麦 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5544", "content": "35.05% 扩大 100 倍 后 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5749", "content": "水果 超市 运 来 苹果 、 香蕉 各 8 箱 ， 苹果 每箱 25 千克 ， 香蕉 每箱 18 千克 ， 那么 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12035", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 1.5 小时 行 了 96 千米 ， 这时 离 乙地 还有 192 千米 ． 照 这样 的 速度 ， 再行 几小时 到达 乙地 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6938", "content": "有 一袋 大米 ， 第一周 吃 了 40% ， 第 二 周 吃 了 24 千克 ， 还 剩 6 千克 ， 这 袋 大米 原来 有 多重 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16586", "content": "某村 用 土地 总面积 的 (1/4) 种 蔬菜 、 (3/5) 种 粮食 ， 其余 的 种 果树 ． 种 果树 的 面积 占 总面积 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7979", "content": "水果店 运 来 苹果 40 筐 ， 占 运 来 的 水果 总数 的 (5/8) ， 运 来 水果 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9999", "content": "某 工厂 投资 200 万元 建 厂房 ， 比 原 计划 节省 了 50 万元 ， 节省 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2710", "content": "甲地 到 乙地 相距 480 千米 ， 一辆 汽车 从 甲地 到 乙地 ， 3 小时 行 了 180 千米 ， 按照 这样 的 速度 ， 还要 几小时 能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13771", "content": "比 60 少 25% 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3831", "content": "粮店 运 来 30 袋 大米 和 40 袋 面粉 ， 一共 是 2500 千克 ， 大米 每 袋 50 千克 ． 每 袋 面粉 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10564", "content": "体育课 上 ， 王 华 和 同学 们 站 成 一路 纵队 ， 王 华 数 了 数 她 前面 的 人数 正好 是 总 人数 的 (9/16) ， 她 后面 的 人数 正好 是 总 人数 的 (5/12) ． 王 华 排 在 第 多少 名 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21817", "content": "一 辆 汽车 上午 行 2.5 小时 ， 平均 每 小时 行 45 千米 ． 下午 共 行 了 139 千米 ． 这辆 汽车 一天 共 行 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15167", "content": "被减数 是 60 ， 减数 与 差 的 比 是 8 ： 7 ， 减数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12212", "content": "一 个数 的 75% 比 它 的 25% 多 60 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11752", "content": "一 位 农民 (3/4) 小时 可以 整修 土地 60 平方米 ， 平均 每 小时 整修 土地 多少 平方米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21264", "content": "学校 夏令营 组织 军事训练 ， 原 计划 3 小时 走 11.25 千米 ， 实际 2.5 小时 走 完全 程 ． 实际 比 原 计划 每 小时 多 走 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17731", "content": "甲乙 两地 相距 420 千米 ， 一辆 汽车 行驶 了 全程 的 (4/5) ， 行驶 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20462", "content": "光明 纸盒 厂 生产 一种 正方体 纸箱 ， 棱 长 是 5 分 米 ． 体积 = 多少 立方分米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22469", "content": "食堂 购进 白菜 和 萝卜 共 60 千克 ， 其中 白菜 与 萝卜 的 重量 比 为 7 ： 3 ， 后 又 购进 了 若干 千克 萝卜 ， 这时 萝卜 千克 数 占 总数 的 (2/5) ， 则 又 购进 萝卜 多少 千克 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4194", "content": "光明 小学 三年级 和 四年级 要 给 780 棵 树 浇水 ， 三年级 每天 浇 60 棵 ， 浇 了 7 天 ， 剩下 的 由 四年级 来 浇 ， 4 天 浇 完 ， 平均 每天 浇 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8305", "content": "乌龟 的 寿命 可 达到 116 年 ， 比 老虎 寿命 的 2 倍 还 多 16 年 ， 老虎 的 寿命 = 多少 年 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5931", "content": "一 辆 汽车 行驶 225 千米 ， 节约 汽油 15 千克 ， 照 这样 计算 行驶 800 千米 ， 一共 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9318", "content": "一 桶 油 ， 用 去 25% ， 还 剩下 下 21 千克 ， 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8473", "content": "学校 风雨 球场 的 圆柱形 柱子 高 3 米 ， 底面 直径 0.5 米 ， 若 将 柱子 重新 油漆 ， 需 油漆 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "812", "content": "仓库 里 有 大米 1200 袋 ， 运走 了 (1/3) ， 又 运 来 300 袋 ， 运 来 的 是 运走 的 几分 之 几 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14638", "content": "妈妈 带 50 元 钱 ， 买 了 15 个 饭碗 ， 还 剩下 12.5 元 ， 每个 饭碗 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15531", "content": "某校 1 ～ 4 年级 ， 分别 有 260 人 、 300 人 、 280 人 、 312 人 ， 平均 每个 年级 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16504", "content": "某 果园 去年 收获 苹果 30 吨 ， 今年 收获 苹果 36 吨 ， 今年 比 去年 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16487", "content": "比 119 的 (8/17) 少 19 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14692", "content": "粮店 有 2800 千克 大米 ， 已 卖出 (2/7) ， 剩下 的 比 卖出 的 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13040", "content": "某校 举行 数学 、 作文 、 智力竞赛 ， 参加 数学 竞赛 的 有 208 人 ， 参加 作文 竞赛 的 有 195 人 ， 参加 智力竞赛 的 有 154 人 册 时 参加 数学 、 作文 竞赛 的 有 103 人 ， 同时 参加 数学 、 智力竞赛 的 74 人 ， 同时 参加 作文 、 智力竞赛 的 有 68 人 ， 3 项 同时 都 参加 的 有 47 人 ， 这个 学校 参加 竞赛 的 共有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "9974", "content": "前进 村 去年 收入 2.5 万元 ， 今年 比 去年 增长 了 20% ， 今年 收入 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17805", "content": "亮亮的 妈妈 要 为 姥姥 汇 1000 元 钱 ， 邮局 规定 要 交 1% 的 汇费 ， 汇费 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3592", "content": "甲乙 两列 火车 分别 从 a 、 b 两城 同时 相向 开出 ， 当 两车 相遇 后 又 继续前进 ， 甲 车行 了 全程 的 (4/5) 时 ， 乙 车 恰好 行 了 全程 的 (3/4) ， 两车 相距 352 千米 ， a 、 b 两城 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9171", "content": "3 月 12 日 植树节 ， 男女生 共 植树 531 棵 ． 已知 男生 有 51 人 ， 女生 有 45 人 ， 男生 每人 植树 6 棵 ， 余下 的 留给 女生 ， 问 女生 每人 植树 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8584", "content": "一 根 钢管 长 12 米 ， 截去 (1/3) ， 剩下 多少 米 ？ 列式 ： 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21675", "content": "一 张 试卷 有 25 道 题 ， 答对 一 题 得 4 分 ， 答错 或 不 答 均 倒扣 1 分 ， 某 同学 共 得 60 分 ， 他 答对 了 多少 道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15930", "content": "同学 们 排成 一队 做操 ， 排 在 小 明 前面 的 同学 占 总 人数 的 (3/5) ， 排 在 小 明 后面 的 同学 占 总数 的 (1/3) ． 从前 往后 数 ， 小 明 排 在 第几个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19306", "content": "六年级 有 学生 128 人 ， 已 达到 体育 煅 炼 标准 的 占 (5/8) ， 而 达标 的 学生 中 (2/5) 是 女同学 ， 达标 的 女同学 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16305", "content": "1 / (15/16) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21840", "content": "一 个 服装厂 原来 做 一种 儿童服装 ， 每套 用布 2.2 米 ． 现在 改进 了 裁剪 方法 ， 每套 节省 0.2 米 ． 原来 做 600 套 这种 服装 所用 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2010", "content": "甲 、 乙 两艘 轮船 从 相距 654 千米 的 两地 相对 开出 而 行 ， 8 小时 两 船 还 相距 22 千米 ． 已知 乙 船 每 小时 行 42 千米 ， 甲 船 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15683", "content": "小 明 和 小 英 同时 放学 回家 ， 小 明 家 离 学校 大约 有 840 米 ， 小 英 家 离 学校 大约 有 480 米 ， 如果 他们 每分钟 步行 的 速度 都 按 60 米 计算 ， 小 英 可以 比 小 明早 到 家 多少 分钟 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13187", "content": "(7/10) - (2/10) ， 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17931", "content": "一 条 裤子 49 元 ， 一件 上衣 的 价钱 是 一条 裤子 价钱 的 2 倍 ． 买 这样 一套 衣服 ， 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6640", "content": "妈妈 的 年龄 是 小 南 年龄 的 3.5 倍 ， 爸爸 年龄 是 小 南 年龄 的 3.8 倍 ， 妈妈 比 爸爸 小 3 岁 ， 小 南 今年 几岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17551", "content": "某 车间 要 加工 一批 零件 ， 原 计划 每天 加工 600 个 ， 12 天 完成 ； 实际 每天 多 加工 零件 120 个 ． 实际 加工 几天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20875", "content": "一 台 学习机 原价 800 元 ， 现在 打 0.9 出售 ， 比 原来 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13135", "content": "一 个 篮球 的 价钱 是 150 元 ， 一个 排球 的 价钱 是 一个 篮球 价钱 的 (4/5) ， 一个 足球 的 价钱 是 一个 排球 价钱 的 (7/8) ， 一个 足球 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7755", "content": "两个 因数 的 积 是 52.3 ， 一个 因数 扩大 10 倍 ， 另 一个 因数 不变 ， 则 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11929", "content": "甲 、 乙 两 人 同时 骑 自行车 由 a 村 到 b 村 ， 甲 每 小时 行 12 千米 ， 乙 每 小时 行 9 千米 ． 经过 4 小时 ， 甲 到达 b 村 ． 这时 乙 还要 多久 才能 到达 b 村 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20457", "content": "20 - (10/11) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14671", "content": "学校 组织 英语 竞赛 ， 四年级 有 180 人 参加 ， 五年级 有 240 人 ， 六年级 参加 的 人数 是 4 、 五年级 总数 的 (4/5) ， 六年级 有 多少 人 参加 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8288", "content": "74 + 83 + 95 - 82 - 73 - 94 = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "22825", "content": "一 种 运动鞋 原价 228 元 ， 现在 打 0.6 出售 ． 学校 要 买 12 双 这样 的 运动鞋 ， 一共 要 花 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8236", "content": "妈妈 到 市场 买 肉 ， 每千克 15.25 元 ， 买 了 3.6 千克 肉 ， 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17090", "content": "一 个 圆形 水池 ， 直径 3.5 米 ， 周长 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22721", "content": "商店 运进 一批 水果 ， 其中 有 苹果 100 千克 ， 梨 比 苹果 多 (1/2) ， 梨 和 苹果 占 水果 总量 的 20% ， 商店 共 运进 水果 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16817", "content": "修 一条 公路 ， 6 天 修 了 7.68 千米 ， 剩下 的 8.96 千米 还要 多少 天 才能 修 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17298", "content": "校 图书馆 买来 100 本书 ， 拿出 28 本书 放在 书架上 ， 剩下 的 平均 分给 4 个 班 ， 每班 分 得 多少 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12315", "content": "将 一个 长 是 5 dm ， 宽 4 dm 的 长方形 框架 拉 成 一个 高 4.5 dm 的 平行四边形 ， 这个 平行四边形 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17665", "content": "同学 们 在 长 200 米 的 小路 一边 植树 ， 每隔 4 米 载 一棵 （ 两端 都 要 栽 ） ， 一共 需要 多少 棵 树苗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17818", "content": "从 850 里 连续 减去 多少 个 5 ， 正好 减 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20547", "content": "一 袋 大米 吃 了 它 的 (3/5) ， 正好 是 15 千克 ， 这 袋 大米 原有 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19577", "content": "小 明 家 买 了 一袋 大米 ， 第一周 吃 去 9 千克 ， 第 二 周 吃 去 了 40% ， 还 剩下 6 千克 ． 这 袋 大米 共 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4046", "content": "小 聪 每分钟 练 8 个 字 ， 每天 练 9 分钟 ． 每天 练 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8322", "content": "一 辆 汽车 共 载客 50 人 ， 其中 一部分 人 买 a 种 票 ， 每张 0.8 元 ， 另 一部分 人 买 b 种 票 ， 每张 0.3 元 ． 最后 统计 出 ： 所 卖 的 a 种 票 比 b 种 票 多 收入 18 元 ． 多少 人 买 a 种 票 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2157", "content": "一 本书 80 页 ， 小名 第一天 看 了 (1/5) ， 第 二 天 应从 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20998", "content": "8 人 参加 一 次 同学聚会 ， 若 每 2 人 都 要 握手 一次 ， 则 一共 握手 多少 次 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19512", "content": "在 边长 为 10 厘米 的 正方形 纸 上 画 一个 最大 的 圆 ， 这个 圆 的 周长 = 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11020", "content": "一 桶 油 第一次 倒 出 全 桶 的 (1/4) ， 第 二 次 倒 出 24 千克 ， 桶 里 还 剩下 36 千克 ， 这 桶 油 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12518", "content": "一 个 火柴盒 长 4 厘米 ， 宽 2.5 厘米 ， 高 1 厘米 ， 它 的 棱 长 总和 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7932", "content": "某 水果店 进 水果 ， 上 月 进 水果 44 吨 ， 比 本月 进 水果 的 50% 还 多 0.2 吨 ， 本月 进 水果 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13045", "content": "京沪 高铁 大约 长 1312 千米 ， 动车组 列车 从 北京 到 上海 大约 4 小时 ， 而 普通 列车 大约 8 小时 ， 那么 动车组 列车 比 普通 列车 每 小时 快 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20711", "content": "一 个数 的 (4/7) 是 28 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19744", "content": "某校 五年级 会 弹琴 的 学生 占 全年 级 人数 的 (1/12) ， 会 吹 长笛 的 学生 占 全年 级 人数 的 (1/8) ， 会 吹 长笛 的 比 会 弹琴 的 学生 多 20 人 ， 该校 五年级 学生 共有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22266", "content": "一 辆 汽车 行 7.5 千米 需要 汽油 (3/5) 升 ， 那么 用 1 升 汽油 可行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10542", "content": "特快 列车 的 速度 是 160 千米 / 时 ， 一天 （ 24 时 ） 可以 行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11045", "content": "一 个数 的 (2/3) 比 这个 数 的 50% 多 5.2 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22435", "content": "有 6 束 花 ， 每 束 15 朵 ， 如果 从 每 束 里 拿出 2 朵 ， 剩下 的 一共 有 多少 朵花 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3692", "content": "24060 / 38 与 22 的 和 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13369", "content": "商店 运 来 一批 水果 ． 其中 红富士 苹果 占 水果 总量 的 (2/8) ， 香蕉 占 水果 总量 的 (5/8) ， 香蕉 比 苹果 多出 总量 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20853", "content": "一 辆 汽车 计划 每 小时 行 40 千米 ， 从 甲地 到 乙地 需要 7.5 小时 ； 实际 3 小时 行 了 180 千米 ， 照 这样 行 完全 程 要 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4506", "content": "盒子 里 有 同样 大小 的 红色 球 和 蓝色 球 各 4 个 ， 要求 摸 出 的 球 一定 要 有 2 个 同 色 的 ， 至少 要 摸 出 多少 个 球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19435", "content": "（ 2.4 * 0.72 * 1.6 ） / （ 0.48 * 32 * 0.36 ） = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5405", "content": "新民 小学 六年级 有 学生 160 人 ， 其中 70 人 已经 达到 国家 体育锻炼 标准 ， 要 使 六年级 达标率 达到 85% ， 还 应有 多少 人 达标 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21969", "content": "蓝鲸 每 小时 游 84 千米 ， 比 鲨鱼 的 速度慢 (1/4) ． 鲨鱼 每 小时 游 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20328", "content": "学校 5 月份 计划 用水 480 吨 ， 实际 少 用 60 吨 ， 实际 用水 比 原 计划 节约 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4516", "content": "果园 里 苹果树 的 棵 数 比 杏树 多 (3/7) ， 正好 多 39 棵 ． 果园 里 有 杏树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5949", "content": "12 是 8 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18381", "content": "冰雪节 期间 ， 有 376 名 志愿者 为 冰雪节 服务 ． 其中 导游 、 解说 人员 128 人 ． 其余 的 分 31 个 小分队 为 冰 赛 演出 和 冰雪 竞赛 服务 ． 平均 每个 小分队 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18247", "content": "“ 6 一 ” 节 那天 ， 小 李 在 锡 师 附小 4 五年级 举行 的 “ 爱心 义卖 ” 活动 中 ， 把 自己 心爱 的 《 365 夜 故事 》 上下册 作为 义卖 商品 ， 原价 是 50 元 ， 这 一次 他 义 卖价 是 10 元 ， 他 的 义 卖价 是 原价 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20724", "content": "少先队员 采集 树种 ， 第一 小队 13 人 ， 一共 采集 (9/16) 千克 ， 第 二 小队 10 人 ， 一共 采集 (7/8) 千克 ， 平均 每人 采集 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4231", "content": "一 桶 农药 ， 第一次 倒 出 (2/7) 然后 倒 回 桶 内 120 克 ， 第 二 次 倒 出 桶 中 剩下 农药 的 (3/8) ， 第 3 次 倒 出 320 克 ， 桶 中 还 剩下 80 克 ， 原来 桶 中 有 农药 多少 克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "13600", "content": "芳 芳 带 了 1.55 元 去 买 一 本书 ， 可 她 的 钱 买 这 本书 还 缺 0.36 元 ． 这 本书 的 价钱 = 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14297", "content": "有 27 跟 小 棒 ， 每 3 根 摆 一个 △ ， 可以 摆 多少 个 △ ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9169", "content": "一 桶 油 吃 了 (4/5) 后 ， 买来 6 千克 ， 买来 这些 油 相当于 吃 去 的 (1/8) ， 这 桶 油 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2311", "content": "王老师 每月 工资 1265 元 ， 按照 个人所得税 ， 每月 的 个人收入 超过 800 元 的 部分 应 按照 5% 的 税率 征收 个人所得税 ， 王老师 每月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18409", "content": "机床厂 去年 4 个 季度 分别 完成 全年 任务 的 (1/6) 、 (1/5) 、 (4/15) 、 (7/10) ， 去年 超额完成 全年 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "19507", "content": "淘气 要 演 写 一份 800 字 的 稿件 ， 已经 写 了 15 分钟 ， 每分钟 写 20 个 字 ， 还 剩 多少 字 没 写 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18339", "content": "水果店 先 运 来 400 箱 苹果 ， 后来 又 运 来 304 箱 ， 8 天 全部 卖光 ， 水果店 平均 每天 卖 多少 箱 苹果 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16079", "content": "一 本 故事书 448 页 ， 明明 用 16 天 看 完 ， 芳 芳 每天 比 明明 多 看 4 页 ， 芳 芳 每天 看 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9449", "content": "商店 买 了 25 箱 肥皂 ， 每箱 50 盒 ， 每盒 2 元 ， 一共 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18569", "content": "轿车 和 货车 同时 从 相距 20 千米 的 两地 向 同一 方向 开出 ． 已知 货车 平均 每 小时 行 50 千米 ， 轿车 每 小时 行 60 千米 ， 出发 几小时 后 轿车 能 追 上 货车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11367", "content": "张 叔叔 把 2000 元 存入 银行 ， 存 定期 一年 ， 年利率 是 1.98% ， 到期 时 能 得到 税后 利息 多少 元 ？ （ 交纳 利息税 5% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3419", "content": "在 今年 的 植树节 活动 中 ， 东方 小学 五年级 同学 植树 180 棵 比 三年级 多 植 (1/5) ， 东方 小学 三年级 学生 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2873", "content": "学校 要求 四年级 同学 准备 160 件 手工 作品 ， 已经 做 了 76 件 ， 剩下 的 分给 28 位 同学 去 做 ， 平均 每人 要 做 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2095", "content": "小 刚 送给 弟弟 4 个 练习本 后 ， 还 比 弟弟 多 2 个 练习本 ， 原来 弟弟 比 小 刚 少 多少 个 练习本 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1289", "content": "某 玩具厂 要 生产 一批 玩具 ． 原 计划 每天 生产 100 件 ， 25 天 可以 完成 ， 实际 提前 5 天 完成 ． 实际 每天 生产 玩具 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "827", "content": "水果店 上午 运进 140 千克 苹果 ， 下午 运进 的 比 上午 的 2 倍 还 多 50 千克 ， 这 一天 共 运进 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13583", "content": "某 小学 有 男生 420 人 ， 女生 比 男生 多 (1/6) ， 男生 比 女生 少 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14010", "content": "一 只 熊猫 5 天 吃 食物 150 千克 ， 一只 大象 比 一只 熊猫 每天 多 吃 食物 432 千克 ． 一只 大象 每天 吃 食物 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "152", "content": "李 叔叔 买 了 30000 元 定期 5 年 的 国家 建设 债券 ， 年利率 为 3.14% ． 到期 时 ， 李 叔叔 的 本金 和 利息 共有 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17476", "content": "每 节车厢 有 108 个 硬座 ， 共有 12 节 硬座 车厢 ． 还有 308 张 硬座 车票 没 卖出 ． 这 列 火车 一共 卖出 了 多少 张 硬座 的 火车票 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3182", "content": "有 一列 数 ， 第一个 是 6 ， 后面 每 一个 数 都 比 前面 一个 数 大 3 ， 请 你 算 一 算 ， 这 列 数 中 ， 第 多少 个数 是 81 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1242", "content": "机械厂 第一 车间 有 男 工人 60 人 ， 女工 人数 比 男工 人数 的 (3/4) 多 6 人 ， 该 车间 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21509", "content": "用 汽车 运 一堆 货物 ， 原 计划 每 小时 运 120 吨 ， 9 小时 可以 运 完 ， 实际 每 小时 运 90 吨 ， 多少 小时 可以 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23057", "content": "一 条 公路 已修 了 80 米 ， 占 全长 的 (1/4) ， 这 条 公路 还 剩 多少 米 没有 修 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11285", "content": "一 个 梯形 的 面积 是 25 dm ^ 2 ， 上 底 是 4.8 dm ， 下 底 是 5.2 dm ， 高 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6353", "content": "一 列 火车 原来 从 a 地 到 b 地 要 6 时 ， 现在 只要 4 时 ． 原来 用 的 时间 比 现在 用 的 时间 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "343", "content": "雪花 啤酒厂 每 小时 可以 生产 啤酒 12000 升 ， 如果 每 (3/5) 升 啤酒 装 一瓶 ， 那么 该 啤酒厂 每 小时 可以 生产 多少 瓶 啤酒 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21106", "content": "学校 图书室 现有 图书 1500 册 ， 比 原来 增加 了 300 册 ． 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "598", "content": "水果店 有 30 筐 生 梨 ， 苹果 的 筐 数 是 生 梨 的 2 倍 ， 橘子 的 筐 数 比 苹果 多 16 筐 ， 橘子 有 多少 筐 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13390", "content": "一 个数 的 (1/7) 比 它 的 (1/8) 多 2 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6989", "content": "粮店 运 来 168 袋 大米 ， 每 袋 35 千克 ， 卖出 一部分 后 ， 还 剩 42 袋 ， 卖出 了 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19753", "content": "学校食堂 买 了 156 千克 青菜 ， 吃 了 4 天 后 还 剩 64 千克 ． 平均 每天 吃 多少 千克 青菜 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17747", "content": "农具厂 原 计划 全年 生产 农具 7200 件 ， 实际 每月 都 比 计划 增产 (1/10) ， 照 这样 计算 ， 全年 一共 增产 多少 件 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19551", "content": "王 叔叔 原来 体重 是 90 千克 ． 坚持 体育锻炼 后 ， 体重减轻 了 (5/12) ， 现在 王 叔叔 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14548", "content": "ab 两地 相距 936 千米 ， 一辆 汽车 3 小时 行 了 216 千米 ， 照 这样 的 速度 还要 几小时 才能 到达 目的地 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1567", "content": "修 一条 公路 ， 第一个 月 修 380 m ， 第 二 个 月 修 420 m ， 还 剩下 (3/5) 没 修 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10175", "content": "一 个 长 为 7.5 分 米 ， 宽 为 6 分 米 ， 高 为 4 分 米 的 长方体 沙 池 ， 它 的 容积 大约 = 多少 立方分米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7037", "content": "六年级 有 男生 137 人 ， 女生 103 人 ， 六年级 人数 正好 占 全校 总 人数 的 (2/13) ， 全校 共有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14272", "content": "水果店 运 来 180 千克 苹果 和 240 千克 梨 ， 每 15 千克 装 一箱 ， 苹果 比 梨 少装 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17803", "content": "工厂 有 一堆 煤 原 计划 每天 烧 0.2 吨 ， 可以 烧 36 天 ． 技术 改良 后 每天 只 烧 0.18 吨 ， 这 堆 煤 可以 比 原 计划 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22588", "content": "水果店 有 苹果 1800 千克 ， 卖出 它 的 (1/5) 后 ， 剩下 的 苹果 的 重量 比 梨 的 重量 少 40% ， 水果店 有 梨 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22695", "content": "一 个 工人 一天 做 85 个 零件 ， 照 这样 计算 ， 5 个 工人 8 天 能 做 多少 个 零件 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6589", "content": "甲地 到 乙地 150 千米 ， 一辆 汽车 从 甲地 出发 ， 走 了 (4/5) 千米 ， 它 离 乙地 还有 多少 千米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2242", "content": "五年级 的 人数 是 800 人 ， 是 六年级 人数 的 (8/9) ， 六年级 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9580", "content": "三年级 同学 去 果园 劳动 ， 男同学 去 了 122 人 ， 女同学 去 了 121 人 ， 每 9 人 分成 一组 ， 一共 分 几组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19253", "content": "甲 、 乙 两城 相距 500 千米 ， 一辆 小汽车 和 一辆 货车 同时 从 甲 、 乙 两城 相向 开出 ， 3 小时 后 两车 相距 5 千米 没 相遇 ， 小汽车 每 小时 行 90 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4326", "content": "平平 看 一 本书 ， 原 计划 每天 看 50 页 ， 8 天 看 完 ． 我 实际 5 天 就 看 完 了 ， 实际 每天 比 计划 多 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9957", "content": "一 艘 轮船 每 小时 行驶 43 千米 ， 上午 行驶 了 6 小时 ， 下午 以 同样 的 速度 又 行驶 了 5 小时 ， 这 艘 轮船 一天 共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17402", "content": "某人 参加 一 个 国际 会议 ， 连同 这位 代表 在内 与会 的 人士 共有 48 位 ． 这位 代表 说 ： 我 并 没有 与 会议 中 的 每 一位 代表 都 握手 （ 自己 不必 与 自己 握手 ） ． 请问 最 多 有 多少 位 代表 与 参加 会议 的 每 一位 代表 都 握 过手 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21504", "content": "一 个数 的 20% 是 40 ， 这个 数 的 50% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10919", "content": "某 厂 加工 一批 零件 ， 上半年 完成 全年 任务 的 (5/7) ， 下半年 只要 完成 全年 任务 的 几分 之 几 就 完成 了 计划 工作量 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3747", "content": "爸爸 去年 存 了 一笔 教育 储蓄 ， 今年 到期 后 得到 本金 和 利息 共 3116.1 元 ， 银行 营业员 告诉 他 教育 储蓄 的 年利率 是 3.87% ． 你 知道 爸爸 存 人 银行 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15603", "content": "同学 们 绿化 校园 ， 二年级 种树 58 棵 ， 三年级 种 的 棵 数 比 二年级 的 2 倍 还 多 15 棵 ， 三年级 种树 多少 棵 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22321", "content": "零件 加工厂 加工 960 个 零件 ， 李师傅 5 天 加工 了 600 个 ． 如果 徒弟 接着 做 ， 要 在 6 天 之内 完成 ， 他 平均 每天 至少 要 加工 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19232", "content": "陆良 到 德宏 听 讲座 的 教师 们 开 轿车 5 小时 行 了 450 千米 ， 照 这样 的 速度 ， 他们 从 陆良 到 德宏 需要 13 小时 ， 昆明 到 德宏 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2291", "content": "水果 批发市场 ， 运 来 水果 (7/10) 吨 ， 其中 苹果 有 (2/5) 吨 ， 梨 有 (1/4) 吨 ， 其余 的 是 香蕉 ， 香蕉 有 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18457", "content": "甲 数 的 (2/5) 等于 乙 数 的 (1/3) ， 已知 甲 数 是 55 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7585", "content": "服装厂 加工 一批 校服 ， 已经 完成 了 (3/10) ， 再 做 224 套 就 正好 完成 全部 校服 的 任务 ． 这 批 校服 一共 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11819", "content": "960 除以 一个 数 ， 商 是 30 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21825", "content": "学校 运动场 挖 了 一个 长方体 形状 的 沙坑 ， 长 4 米 ， 宽 2 米 ， 现在 要 把 6 立方米 的 黄沙铺 在 沙坑 里 ， 可以 铺 多 厚 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3785", "content": "一 水池 有 一根 进水管 和 一根 出水管 ， 进水管 每分钟 流量 是 32 l ， 出水管 每分钟 流量 是 48 l ， 打开 进水管 300 分钟 放满 水 ， 如 打开 出水管 几分钟 可 将 满 池水 放 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15188", "content": "在 “ 家电 下乡 ” 活动 中 农民 购买 家电 可以 享受 政府 补贴 ． 李 大伯 购买 一台 原价 2400 元 的 格力空调 ， 便宜 了 13% ， 便宜 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21277", "content": "修路 队 修 一条 公路 ， 第一天 修 这 段 公路 的 (1/3) ． 第 二 天 修 这 段 公路 的 40% ， 两天 共 修 275 米 ， 这 段 公路 有 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23072", "content": "某 修路 队 修 一条 路 ， 平均 每天 修 138 米 ， 已经 修 了 42 天 ， 还 剩 385 米 没 修好 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10548", "content": "图书室 有 故事书 95 本 ， 今天 借出 58 本 ， 还 回 35 本 ． 现在 图书室 有 故事书 多少 本 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2526", "content": "4 箱 蜜蜂 一年 可以 酿 300 千克 蜂蜜 ． 小林 家养 了 这样 的 蜜蜂 12 箱 ， 一年 可以 酿 多少 千克 蜂蜜 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11007", "content": "一 个 平行四边形 底 是 5 分 米 ， 高 是 3.6 分 米 ， 它 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14350", "content": "把 5 克 盐 放入 195 克 水中 ， 盐 的 重量 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1896", "content": "一 个数 的 6 倍 比 它 的 2 倍 多 36 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9243", "content": "食堂 每天 烧煤 186 千克 ， 比 计划 节省 14 千克 ， 实际 每天 比 计划 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5619", "content": "李 叔叔 给 希望 小学 23 个 班 捐 了 一些 练习本 ， 学校 给 每班 发 168 本 后 ， 还 剩下 80 本 ， 李 叔叔 给 希望 小学 捐 了 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10574", "content": "一 辆 汽车 5 天 节约 汽油 50.4 千克 ， 平均 每天 节约 多少 千克 汽油 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17071", "content": "一 块 平行四边形 地底 是 60 米 、 高 是 45 米 ， 在 这块 地上 栽 桃树 ， 平均 每棵 桃树 占地 6 平方米 ， 这块 地 一共 可 栽 桃树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9297", "content": "师傅 7 天 能 做 零件 4515 个 ， 徒弟 一周 能 做 零件 1155 个 ， 师傅 平均 每天 比 徒弟 多 做 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16799", "content": "一 辆 运 菜 车 ， 车上 装 萝卜 (1/2) 吨 ， 装 的 土豆 比 萝卜 少 (1/10) 吨 ， 装 的 白菜 比 土豆 多 (7/8) 吨 ， 车上 装 了 多少 吨 白菜 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10537", "content": "180 吨 减少 它 的 25% 后 ， 再 增加 (2/3) ， 结果 = 多少 吨 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10187", "content": "一 个 正方形 的 边长 是 8 厘米 ， 如果 把 它 的 边长 增加 1 厘米 ， 那么 它 的 面积 增加 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "6113", "content": "货场 有 煤 54 吨 ， 已经 运出 4 次 ， 还 剩 6 吨 没 运 ， 平均 每次 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15277", "content": "甲 、 乙 两个 工厂 之间 相距 75 千米 ． 小 王 驾驶 一辆 轿车 从 甲 厂 出发 行驶 30 千米 共用 去 2 升 汽油 ． 照 这样 计算 ， 这辆 轿车 从 甲 厂 开 到 乙 厂 还 需要 多少 升 汽油 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22276", "content": "快慢 两车 从 甲乙 两地 相对 开出 ， 快车 先行 了 全程 的 (1/5) 又 11 千米 后 ， 慢车 才 开出 ． 相遇 时 ， 慢 车行 了 全程 的 (2/7) ． 已知 快 、 慢 两车 速度 比 是 5 ： 4 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6784", "content": "一 个 长方形 菜地 ， 面积 是 68.4 平方米 ， 它 的 宽 是 7.2 米 ， 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20890", "content": "某 小区 的 绿化带 ， (3/9) 的 地 种 了 柏树 ， 剩下 的 种 松树 ， 种 松树 的 地 占 整个 绿化带 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4775", "content": "学校 买来 篮球 和 足球 共 105 个 ， 其中 足球 的 数量 比 总数 的 (3/7) 还 少 3 个 ， 学校 买来 足球 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15230", "content": "食堂 运 来 120 吨 煤 ， 已经 烧 了 40 天 ， 每天 烧 1.2 吨 ， 余下 的 要 30 天 烧 完 ， 平均 每天 烧 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3137", "content": "多少 的 12 倍 是 420 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18170", "content": "三年级 3 个 班 同学 ， 一起 外出 参加 “ 我 爱 科学 ” 活动 ， 每个 班 平均 分成 4 组 ， 每组 14 人 ， 三年级 一共 有 多少 人 参加 这次 活动 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8465", "content": "李 叔叔 月薪 3000 元 ， 他 每月 应 缴纳 个人所得税 多少 元 ． （ 税率 是 10% ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1334", "content": "为了 保障 世博会 安全 有序 地 召开 ， 在 地铁 沿线 的 主要 入 站 口 设立 了 安检 ， 若 安检 口 5 分钟 通过 105 人 ， 那么 1260 位 乘客 全部 通过 安检 口 需要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15613", "content": "某班 统计 数学 成绩 ， 平均 分为 95.13 分 ． 复查 时 发现 一 人 成绩 是 97 分 误 为 79 分 统计 ． 重新 统计 ， 平均 分为 95.49 分 ． 这个 班 有 多少 个 学生 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15701", "content": "15 * 30 的 积 加上 312 / 13 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18069", "content": "一 座 5 层高 的 塔 ， 最 上边 一层 装 了 2 只 灯 ， 往 下 每 低 一层 多 装 4 只 灯 ， 最 下面 一层 要 装 多少 只 灯 ？ （ 写出 过程 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16239", "content": "计算 ： (1/5) * [ (7/40) / ( 3 - (12/5) * (15/16) ) ] = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12606", "content": "用 1200 粒 种子 做 发芽 实验 ， 结果 有 7% 没有 发芽 ， 发芽 的 种子数 占 总数 的 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13668", "content": "修 一条 长 1250 米 的 公路 ， 平均 每天 修 36 米 ． 修 了 25 天 后 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "854", "content": "王 阿姨 购回 一批 儿童 鞋 ， 加价 15% 后 定价 出售 ， 每 双 46 元 ， 这种 儿童 鞋 的 进价 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16552", "content": "一 根 电线 ， 第一次 剪 去 3.5 米 ， 第 二 次 剪 去 余下 的 (2/9) ， 还 剩下 14 米 ， 这 条 电线 原来 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3794", "content": "小 玲 参加 数学 竞赛 ， 全卷 总 题 数 是 36 题 ， 小 玲 只 做 对 总 题 数 的 (8/9) ． 小 玲 做 错 了 多少 题 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20503", "content": "小 明 今天 做 了 42 道口 算题 ， 小 华 做 的 口 算题 是 小 明 的 2 倍 ， 他们 共 做 了 多少 道口 算题 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15111", "content": "一 捆 电线 长 300 米 ， 用 去 它 的 20% ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10904", "content": "一 筐 西瓜 连 筐 共 重 60 kg ， 卖 了 (3/4) 的 西瓜 后 连 筐 重 18 kg ， 筐 重 多少 kg ． ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4973", "content": "饲养场 养鸡 1500 只 ， 比 鸭 的 数量 少 (3/8) ， 饲养场 养 的 鸡 比 鸭 少 了 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15098", "content": "王 永 到 文具店 先买 了 一本 日记本 ， 用 去 30 元 ， 又 买 了 3 支 同样 的 圆珠笔 ， 用 去 18 元 ． 问 每 本 日记本 比 每支 圆珠笔 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5714", "content": "欧 欧 早上 从 家 到 学校 ， 中途 要 到 一个 卖 早点 的 地方 吃 早餐 ， 吃 完 早餐 后 再 去 学校 ． 现在 已知 他 从 家 到 早餐 点 有 2 条 不同 的 路 可以 走 ， 从 早餐 点 再 到 学校 又 有 3 条 不同 的 路 可以 走 ， 那么 欧 欧 从 家 去 学校 可以 有 多少 种 不同 的 走法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17614", "content": "体育 室 有 235 根 跳绳 ． 上午 借出 87 根 ， 下午 借出 104 根 ． 还 剩 多少 根 跳绳 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13120", "content": "林 丽 出生 时 体重 3.25 千克 ， 3 个 月 后 体重 是 7 千克 ． 林 丽 的 体重 平均 每月 增长 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "684", "content": "水果店 运 来 苹果 、 葡萄 各 12 箱 ． 苹果 每箱 25 千克 ， 葡萄 每箱 15 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13415", "content": "从 232 里 连续 减 8 ， 减 多少 次 就 为 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6337", "content": "西岳华山 高 2160 米 ， 比 东岳泰山 高 628 米 ， 东岳泰山 高 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2842", "content": "35 与 15 的 和 除以 12 与 8 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18760", "content": "小 明 的 体重 是 28 千克 ， 爸爸 的 体重 是 小 明 的 3 倍 ， 妈妈 的 体重 比 爸爸 轻 25 千克 ， 妈妈 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14804", "content": "在 计算 265 - 19 * 7 时 ， 先 算 多少 ， 再 算 多少 ， 结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13827", "content": "学校食堂 买进 大米 和 面粉 各 16 袋 ， 面粉 每 袋 45 元 ， 大米 每 袋 55 元 ， 一共 要 用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "838", "content": "学校 买进 一批 图书 ， 其中 科技 书 有 270 本 ， 故事书 比 这 批 图书 的 总数 的 (2/5) 少 90 本 ， 科技 书 和 故事书 共 占 这 批 图书 的 总数 的 (5/8) ， 这 批 图书 一共 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2978", "content": "甲乙 两车 同时 从 ab 两地 出发 ， 相对 而 行 ， 甲 每 小时 行 45 千米 ， 乙 每 小时 行 55 千米 ， 如果 甲 每 小时 增加 15 千米 ， 乙 每 小时 增加 5 千米 ， 则 相遇 时间 可 提前 (1/4) 小时 ， ab 两地 的 路 = 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "21941", "content": "6 （ 1 ） 班 有 26 人 订阅 了 《 小学生 语文报 》 ， 有 30 人 订阅 了 《 小学生 数学 报 》 ， 其中 有 11 人 两种 报纸 都 订 了 ， 还有 3 人 两种 报纸 都 没 订 ． 这个 班 一共 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22457", "content": "李老师 从 邮局 给 山区 中学 儿童 王 林 汇款 500 元 ， 按照 规定 ， 汇费 是 汇款 数 的 1% ， 老师 应付 多少 元 汇费 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1537", "content": "车间 生产 了 2000 支 彩笔 ， 每 12 支 装 一盒 ， 装 了 150 盒 后 ， 还 剩 多少 支 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13388", "content": "同学 们 为 庆祝 教师节 美化 教室 ， 购买 了 54 米拉 花 和 48 个 气球 ， 一共 花 了 26.1 元 ， 其中 拉 花 每 米 0.35 元 ， 气球 每个 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1657", "content": "六年级 一班 男生 人数 占 全班 总 人数 的 (4/7) ， 男生 有 24 人 ， 女生 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20271", "content": "张家村 今年 春季 植树 1480 棵 ， 比 李家 村 植树 的 棵 数 少 245 棵 ， 李家 村 今年 植树 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13927", "content": "2006 年 ， 张 强 收集 废电池 180 节 ， 陈 明 收集 的 废电池 是 张 强 的 (5/6) ， 韩 亮 收集 的 废电池 是 张 强 的 (4/5) ． 韩 亮 收集 废电池 多少 节 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15300", "content": "把 5 克 盐 放入 10 千克 水中 ， 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10501", "content": "小 佳 的 妈妈 给 了 营业员 50 元 ， 买 了 3 枝 水笔 ， 找回 29 元 ， 每枝 水笔 多少 元 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15496", "content": "明明 骑车 从 家 到 学校 ， 每分钟 行驶 226 米 ， 行驶 了 13 钟 ． 明明 家 到 学校 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5309", "content": "小 明 打 一篇 稿件 ， 如果 每分钟 打 85 个 字 要 打 39 分钟 ． 如果 每分钟 打 65 个 字 ， 要 打 多少 分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8652", "content": "畜牧场 养 山羊 120 只 ， 奶羊 的 只 数 是 山羊 的 3 倍 ， 养 的 绵羊 比 奶羊 少 75 只 ． 养 绵羊 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13580", "content": "东风 水泥厂 上个月 生产 水泥 560 吨 ， 比 计划 超产 (3/25) ， 上个月 计划 生产 水泥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13706", "content": "有 40 个 连续 的 自然数 ， 其中 最大 的 数 是 最小 的 数 的 4 倍 ， 那么 最大 的 数 与 最小 的 数 之 和 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22377", "content": "一 个 车间 加工 一批 零件 ， 第一季度 完成 上半年 计划 的 (3/5) ， 第 二 季度 完成 上半年 计划 的 (5/8) ， 结果 超产 450 个 零件 ， 计划 上半年 加工 多少 个 零件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8063", "content": "小 红 和 小 明 一起 立定 跳远 比赛 ， 小 红 跳 了 2.18 米 ， 比 小 明 多 跳 了 0.12 米 ， 小 星 比 小 明 少 跳 了 0.15 米 ， 小 星 跳 了 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5432", "content": "从 (5/6) 里面 减去 (1/6) 与 (3/5) 的 和 ． 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1974", "content": "一 种 农具 原来 每件 成本价 是 320 元 ， 现在 降低 到 280 元 ， 每件 成本 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18660", "content": "超市 上午 卖出 大米 153 袋 ， 下午 比 上午 多 卖出 56 袋 ， 这 一天 工 卖出 大米 多少 袋 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5371", "content": "日照 村 修 防洪堤 ， 第一周 修 了 全长 的 35% ， 第 二 周 修 了 3600 米 ， 这时 两周 修 的 总 米 数 距 全长 的 (3/4) 还有 400 米 ． 这 条 防洪堤 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8087", "content": "一 块 草坪 长 30 米 ， 宽 20 米 ， 如果 把 宽 增加 5 米 ， 长 不变 ， 扩大 后 的 草坪 面积 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16760", "content": "一 只 大象 重 5.1 吨 ， 是 一头 黄牛 体重 的 15 倍 ， 一头 黄牛 重 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14254", "content": "一 列 火车 (3/4) 小时 行 90 千米 ， 照 这样 计算 ， 从 甲地 到 乙地 要 行 (9/2) 小时 ， 甲 、 乙 两地 铁路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2148", "content": "小 方 把 (5/6) 米 长 的 丝带 剪成 同样 长 的 5 段 ， 每 段 丝带 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19145", "content": "小 明 将 一根 绳子 平均分 后 ， 剪 了 6 次 ， 每 根 绳子 长 1.25 米 ， 求 原来 这根 绳子 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17752", "content": "操场上 有 14 课 杨树 ， 松树 的 数目 是 杨树 的 4 倍 ， 杨树 和 松树 一共 有 多少 课 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17396", "content": "甲 、 乙 两城 相距 560 千米 ． 两列 火车 同时 从 甲 、 乙 两城 相对 开出 ， 3.5 小时 后 相遇 ． 甲 车 每 小时 行 85 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13024", "content": "长跑 锻炼 ， 小 白跑 了 2 千米 ， 是 小 涛 跑 的 (4/5) ， 小 亮 跑 的 (5/6) 等于 小 涛 跑 的 ． 小 亮 跑 了 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15555", "content": "用 1 ， 2 ， 3 ， 4 ， 5 和 + ， - ， * ， / 组合成 一个 算式 （ 不 使用 括号 ） ， 计算结果 最大 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4690", "content": "清凉 水果店 上 月 按 营业额 的 5% 交纳 了 营业税 后 ， 还 剩 60800 元 ， 清凉 水果店 上 月 的 税前 营业额 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14976", "content": "把 多少 扩大 100 倍 后 ， 再 缩小 10 倍 ， 结果 是 2.06 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2509", "content": "小 鹃 给 小 英 3 颗 糖 后 ， 还 比 小 英 多 1 颗 ， 原来 小 鹃 比 小 英 多 多少 颗 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21933", "content": "计算 ： 2012 * 0.318 + 201.2 * 8.49 - 20.12 * 6.7 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "10637", "content": "一 件 上衣 与 一条 裤子 的 价钱 的 比 是 5 ： 4 ， 一件 上衣 和 一条 裤子 的 价钱 是 180 元 ， 如果 买 一条 裤子 应 花 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2659", "content": "一 袋 大米 的 (3/4) 是 75 千克 ， 这 袋 大米 的 30% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4556", "content": "机床厂 去年 计划 生产 机床 2400 台 ， 实际 超产 (3/20) ， 去年 实际 生产 机床 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10147", "content": "某班 40 位 同学 在 一次 数学考试 测验 中 ， 答对 第一 题 的 有 23 人 ， 答对 第 二 题 的 有 27 人 ， 两 题 都 答对 的 有 17 人 ， 问 有 多少 个 同学 两 题 都 答 不 对 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4771", "content": "甲 数 是 乙 数 的 (1/3) ， 而 丙 数 是 乙 数 的 (3/4) ， 已知 甲 、 乙 、 丙 的 和 是 114 ， 求 乙 数 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7468", "content": "张老师 要 买 一台 电视机 ， 如果 分期付款 商场 要 加价 5% ， 而 一次性 付款 可 按 原价 的 97% 成交 ． 张老师 算了算 ， 发现 分期付款 比 一次性 付款 要 多付 560 元 ． 这 台 电视机 原价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2244", "content": "一 年期 定期存款 年利率 是 2.25% ， 规定 存款 的 利息 按 5% 缴纳 利息税 ， 存入 10000 元 到期 后 从 银行 实际 支取 的 本息 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "18679", "content": "同学 们 排队 做操 ， 每行 站 30 人 ， 正好 站 16 行 ． 如果 每行 站 24 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12018", "content": "一 本 《 少年 百科全书 》 是 96 元 ， 一本 《 故事书 》 是 4 元 ， 一本 《 少年 百科全书 》 的 价钱 是 一本 《 故事书 》 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18818", "content": "25 的 34 倍 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11589", "content": "益华 百货 电器 商场 去年 销售 了 1800 台 电脑 ， 今年 的 销售量 比 去年 增加 了 25% ． 今年 销售 了 多少 台 电脑 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11393", "content": "杨 老师 这个 月工资 1500 元 ， 发表文章 ， 稿费 收入 1200 元 ， 按 国家 规定 ， 月 收入 超过 2000 元 的 ， 应 缴纳 超过 部分 20% 的 个人所得税 ． 杨 老师 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16971", "content": "一 件 衣服 打 0.7 后 是 35 元 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11448", "content": "果园 里 桃树 280 棵 ， 比 梨树 多 (1/6) ， 梨树 和 桃树 共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20224", "content": "王师傅 要 加工 1200 个 零件 ， 每天 加工 60 个 ， 已知 加工 了 4 天 ， 剩下 的 每天 加工 80 个 ， 还要 多少 天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20250", "content": "125 与 30 的 和 ， 被 200 与 45 的 差 除 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14839", "content": "学校食堂 买来 一桶 油 ， 第一次 用 去 (4/5) 千克 ， 第 二 次 用 去 的 是 第一次 的 (6/5) 倍 ， 两次 用 去 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17633", "content": "学校 有 一个 圆形 花圃 周长 36 米 ， 如果 每隔 3 米 放 一盆 ， 一共 需要 放 多少 盆花 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15934", "content": "王老师 的 月工资 是 2600 元 ， 超过 800 元 的 部分 要 缴纳 5% 的 个人所得税 ． 她 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12189", "content": "羌 绣 民族 公司 的 4 台 编织机 8.5 小时 编织 了 2227 m 彩 绳 ， 平均 每 台 编织机 每 小时 可以 编织 多少 米 彩 绳 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17142", "content": "筑路 队 第 4 季度 筑路 161 千米 ， 比 第 3 季度 增加 15% ， 两 季度 共 筑路 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20640", "content": "做 一种 零件 ， 甲 每 小时 做 21 个 ， 乙 每 小时 做 13 个 ． 要 在 7 小时 完成 199 个 这种 零件 ， 甲 、 乙 二 人 至少 要 合 做 多少 小时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20566", "content": "一 辆 客车 从 甲地 开往 乙地 ， 行驶 的 速度 是 60 千米 / 时 ． 已知 甲 、 乙 两地 之间 的 路程 是 240 千米 ， 这辆 客车 几时 后 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12854", "content": "学校 小 会议室 的 主席台 上 可以 坐 10 人 ， 主席台 下 有 23 排座位 ， 每排 可以 坐 9 人 ， 问 ： 学校 小 会议室 一共 可以 坐 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16366", "content": "图书馆 有 科技 书 120 本 ， 故事书 比 科技 书 少 (1/6) ， 故事书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6983", "content": "一 件 电器 提价 10% ， 再 降价 20% ， 则 是 原价 的 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4104", "content": "盒子 里 有 同样 大小 的 红球 和 白 球 各 8 个 ， 要 想 摸 出 的 球 一定 有 2 个 是 同 色 的 ， 至少 要 摸 出 多少 个 球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22748", "content": "池塘 里 的 浮萍 每天 增 一倍 ， 10 天 刚好 长满 整个 池塘 ． 长 了 多少 天时 ， 浮萍 的 面积 刚好 占 池塘 面积 的 8 分 之一 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18742", "content": "把 36 块 糖 平均 分给 20 个 小朋友 ， 每个 小朋友 分 到 总数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2595", "content": "猎狗 每 小时 大约 可以 跑 56 千米 ， 相当于 鸵鸟 每 小时 跑 的 (7/9) ． 鸵鸟 每 小时 大约 可以 跑 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11467", "content": "一 箱 油 的 (1/4) 是 16 千克 ， 它 的 40% = 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13154", "content": "某 大型 养鸡场 把 一天 的 鸡蛋 按 25 千克 装 一箱 ， 装 好 37 箱 后 ， 还 剩 19 千克 ， 这 一天 收 鸡蛋 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8421", "content": "一 个 班 有 36 个 学生 ， 在 一次 测验 中 ， 答对 第一 题 的 25 人 ， 答对 第 二 题 的 23 人 ， 两 题 都 答对 的 15 人 ． 那么 ， 两 题 都 不 对 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5740", "content": "计划 将 一块 地 的 (7/9) 用于 种草 ， (1/9) 用于 植树 ， 植树 的 地面 比 种草 的 地面 少 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18691", "content": "养鸡场 有 公鸡 3000 只 ， 比 母鸡 多 20% ， 有 母鸡 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1978", "content": "在 一张 长 18 厘米 ， 宽 12 厘米 的 长方形 纸片 上 剪 一个 最大 的 正方形 ， 剪 去 的 纸片 面积 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3238", "content": "妈妈 买 了 一些 奶糖 和 38 粒 水果糖 ， 如果 奶糖 吃掉 24 粒 ， 就 比 水果糖 少 9 粒 ， 妈妈 买 了 多少 粒 奶糖 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1165", "content": "庆祝 “ 6 一 ” 儿童节 书店 新 进 文艺 书 2450 本 ， 新 进 文艺 书 的 (3/7) 正好 等于 原有 故事书 的 (2/3) ． 书店 原有 故事书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16742", "content": "一 个 因数 是 405 ， 另 一个 因数 是 5 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20739", "content": "实验 小学 六年级 的 女生 人数 占 全年 级 的 48.75% ， 男生 占 全年 级 人数 的 百分之几 ？ 如果 男生 人数 比 女生 人数 多 12 人 ， 那么 实验 小学 六年级 人数 共有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1380", "content": "妈妈 今年 35 岁 ， 小 玲 今年 8 岁 ． 小 玲 20 岁 时 ， 妈妈 比 小 玲 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20481", "content": "有 100 千克 青草 ， 含水量 为 66% ， 晾晒 后 含水量 降到 15% ． 这些 青草 晾晒 后 重 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5891", "content": "环卫所 要 清理 294 吨 垃圾 ， 已经 清理 了 6 天 ， 每天 清理 24 吨 ， 剩下 多少 吨 还 没有 清理 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15516", "content": "两个 因数 的 积 是 19.8 ， 一个 因数 是 11 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3694", "content": "在 为 四川 汶川 地震 捐款 活动 中 ， 李 刚 捐款 50 元 ， 占 班级 捐款 总数 的 (1/28) ， 全班 捐款 额 占 全 学校 的 (1/32) ， 你 知道 全校同学 共 捐款 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13715", "content": "星光 化肥厂 今年 计划 生产 化肥 2000 吨 ， 实际 超额完成 了 300 吨 ， 实际 完成 了 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3106", "content": "一 个 面包店 买来 160 千克 面粉 ， 用 了 4 天 后 还 剩下 64 千克 ． 平均 每天 用 面粉 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21278", "content": "塑料厂 计划 生产 1300 件 塑料模 件 ， 6 天 生产 了 780 件 ． 照 这样 计算 ， 剩下 的 还要 生产 多少 天 才能 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5215", "content": "王老师 带 了 480 元 钱 ， 买 足球 用 去 120 元 ， 剩下 的 钱 又 买 了 5 个 篮球 ， 平均 每个 篮球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "449", "content": "公园 的 人工湖 里 有 28 只 黑天鹅 ， 白天鹅 的 只 数 比 黑天鹅 的 3 倍 还 多 9 只 ， 白天鹅 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1394", "content": "某 商品 按 0.8 卖出 的 售价 是 160 元 ， 这 商品 的 原价 为 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8363", "content": "水果店 有 720 千克 香蕉 ， 第一天 卖出 总数 的 (1/4) ， 第 二 天 卖出 第一天 的 (2/3) ， 两天 一共 卖出 了 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12095", "content": "妈妈 带 800 元 钱 去 商场 ， 买 了 一件 上衣 用 去 346 元 ， 又 买 了 一个包 用 去 254 元 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1050", "content": "一 捆 电线 长 5 米 ， 第一次 用 去 全长 的 (2/5) ， 第 二 次 用 去 全长 的 (1/4) ， 还 剩下 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4570", "content": "小 明 体重 45 kg ， 比 小 红 重 (1/4) ， 小 红 体重 多少 kg ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4811", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 (1/4) ， 第 二 小时 行 了 余下 的 40% ， 这时 还 剩下 90 千米 ， 从 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5225", "content": "人造地球 卫星 每秒 运行 8 千米 ， 相当于 宇宙飞船 速度 的 (40/57) ． 宇宙飞船 每秒 运行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19009", "content": "5 年 一班 男生 比 女生 多 3 人 ， 女生 比 男生 少 (1/11) ， 这个 班 男生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9526", "content": "小巧 和 小胖 两 人 两 人 同时 从 某地 背向 而 行 ， 小胖 每分钟 行 60 米 ， 小巧 每分钟 行 100 米 ， 行 了 一分钟 后 ， 小巧 转身 去 追 小胖 ， 需要 多少 分钟 追 上 小胖 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15822", "content": "一 种 大豆 色拉油 ， 原价 是 50 元 ， 现价 是 40 元 ， 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8052", "content": "小 王 读 一本 300 页 故事书 ， 上午 读 了 全书 的 (1/20) ， 上午 读 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22141", "content": "三年级 同学 共 288 人 去 参观 科技馆 ， 平均 分成 2 队 ， 每队 平均 分成 3 组 ， 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21113", "content": "142 与 42 的 和 是 8 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13277", "content": "一 种 玩具 国庆 搞 促销 活动 ， 按 0.85 优惠 出售 ， 每 只 玩具 只 卖 17 元 ， 一只 玩具 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14585", "content": "一 根 电线 剪 去 2.4 米 ， 还 剩下 全长 的 40% ， 要 想 剩下 全长 的 75% ， 应 剪 去 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15492", "content": "多少 的 8 倍 与 (4/5) 千克 的 (15/8) 重量 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15442", "content": "一 个 练习本 1.50 元 ， 一枝 钢笔 7.60 元 ． 买 一个 练习本 和 一枝 钢笔 一共 要 付 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16588", "content": "甲乙 两块 棉田 ， 平均 亩产 185 斤 ， 甲 棉田 是 5 亩 ， 亩产 203 ， 乙 棉田 亩产 170 斤 ， 乙 棉田 有 多少 亩 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10850", "content": "妈妈 买 回 一些 梨 ， 平均 放在 6 个 盘子 里 ， 每个 盘子 里 放 4 个 ， 还 多 2 个 ， 妈妈 一共 买 了 多少 个 梨 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21928", "content": "一 个 平行四边形 的 面积 是 32 dm ^ 2 ， 底 是 5 dm ， 高 = 多少 dm ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18307", "content": "牧场 养牛 480 头 ， 比 去年 养 的 多 (1/5) ， 比 去年 多 多少 头 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2151", "content": "18 减去 它 的 (1/3) = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19668", "content": "一 辆 汽车 从 甲地 去 乙地 ， 已经 行 了 120 千米 ， 相当于 全程 的 (3/5) ． 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11405", "content": "红星 小学 六年级 有 学生 182 人 ， 占 全校 人数 的 (2/11) ， 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17592", "content": "40 头 奶牛 30 天 产 奶 12000 千克 ， 平均 每 头 奶牛 每天 产 奶 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21041", "content": "小 楠 家 去年 收 稻谷 2400 kg ， 今年 收 稻谷 比 去年 多 15% ． 她家 今年 收 稻谷 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15729", "content": "小 红 读 了 一 本书 的 (3/4) ， 正好 是 60 页 ． 这 本书 一共 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9379", "content": "甲 乙丙 3 人 行走 的 速度 分别 为 每分钟 30 米 、 40 米 和 50 米 ． 甲乙 同 在 a 地 ， 丙 在 b 地 ． 甲乙 与 丙 同时 相向 而 行 ， 丙 遇见 乙 后 10 分钟 又 和 甲 相遇 ， 求 ab 两地 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "19549", "content": "天津 到 济南 的 铁路 长 357 千米 ， 一列 快车 从 天津 开出 ， 同时 一辆 慢车 从 济南 开出 ， 两车 相向 而 行 ， 经过 3 小时 相遇 ． 快车 平均 每 小时 行 79 千米 ， 慢车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10833", "content": "水泥厂 上 半月 完成 计划 的 56% ， 下半月 完成 月 计划 的 64% ， 超额 生产 水泥 2400 吨 水泥 ， 问 计划 生产 水泥 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14116", "content": "师傅 每 小时 织锦 (1/2) 米 ， 徒弟 8 小时 织 的 与 师傅 6 小时 织 的 同样 多 ． 徒弟 每 小时 织 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1886", "content": "小 冬 看 一本 故事书 ， 第一天 看 了 总 页数 的 (1/6) ， 第 二 天 看 了 总 页数 的 (1/3) ， 还 剩 78 页 没有 看 ， 这本 故事书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "26", "content": "72 个 0.01 组成 的 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19825", "content": "元旦 期间 ， 新春 超市 开展 促销 活动 ， 一个 笔记本 6 元 钱 ， 买 4 本 送 1 本 ， 明明 买 回 10 本 ， 共 便宜 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7690", "content": "六年级 一班 有 21 名 学生 参加 拔河比赛 ， 其他 35 名 学生 组成 “ 拉拉队 ” ， 参加 拔河比赛 的 人数 占 全班 人数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1374", "content": "某 长方体 的 长 是 6 厘米 ， 宽 4 厘米 ， 高 3 厘米 ， 这个 长方体 的 棱 长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3637", "content": "红旗 小学 全体学生 分成 25 个 小组 ， 每个 小组 种 了 5 棵 树苗 ， 购买 树苗 一共 花 了 1250 元 ， 每棵 树苗 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3018", "content": "有 一张 边长 为 1.5 米 长 的 正方形 桌布 ， 如果 每平方米 的 售价 是 16.8 元 ， 这块 桌布 要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2610", "content": "一 块 菜地 用 木条 围成 一个 长方形 ， 长 10 米 ， 比 宽 多 2 米 ， 这块 菜地 的 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17760", "content": "妈妈 买 了 一块 布料 ， 做 上衣 用 去 了 (4/10) ， 做 裙子 用 去 了 (6/10) ， 做 裙子 比做 上衣 多用 去 了 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6244", "content": "西 邢台 村 要 修 一条 长 7.45 千米 的 路 ， 已经 修 了 5 天 ， 每天 修 0.65 千米 ， 剩下 的 要 6 天 修 完 ． 剩下 的 平均 每天 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16200", "content": "甲 、 乙 两 数 的 比 是 5 ： 3 ， 甲 数 比 乙 数 大 6 ， 那么 甲 、 乙 两 数 的 和 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18602", "content": "农民 伯伯 摘 了 苹果 和 橘子 各 232 千克 ， 每 筐 苹果 54 千克 ， 每 筐 橘子 46 千克 ， 农民 伯伯 摘 来 的 苹果 和 橘子 一共 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13686", "content": "解放军 行军 训练 ， 计划 15 天 行军 525 千米 ， 实际 12 天 就 行 完 了 全程 ， 实际 每天 比 计划 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14124", "content": "加工 一批 零件 ， 原 计划 每天 加工 360 个 ， 18 天 可 完成 ， 实际 提前 3 天 就 完成 了 任务 ， 实际 每天 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11722", "content": "一 辆 卡车 一次 运货 6 吨 ， 8 辆 这样 的 卡车 10 次 可以 运货 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6477", "content": "一 项 工程 ， 实际 投资 120 万元 ， 比 原 计划 节约 了 30 万元 ， 请问 实际 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17580", "content": "小 袁 到 公园 去 玩 ， 如果 每 小时 走 3.6 千米 ， 0.8 小时 可以 到达 ， 如果 她 想 0.5 小时 到达 ， 速度 要 提到 多少 才 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1095", "content": "一 个数 的 (3/4)   是 60 ， 这个 数 的 (3/5)   = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22471", "content": "4 - 5.67 * (3/7) 的 积 ， 所得 的 差 除以 (1/3) ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22544", "content": "一 个数 比 48 的 25% 大 13 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22790", "content": "一 列 火车 以 每分钟 180 米 的 速度 穿过 一条 长 200 米 的 大桥 （ 从 车头 开进 桥面 直至 车尾 离开 桥面 ） 用 2 分钟 ， 求 这 列 火车 的 车身 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14942", "content": "一 个 工人 每天 生产 60 个 零件 ， 要 生产 4200 个 零件 ， 一共 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14688", "content": "妈妈 存 3000 元 钱 到 银行 ， 定期 一年 ， 年利率 2.70% ， 缴纳 5% 的 利息税 ． 到期 应 缴 利息税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "7784", "content": "妈妈 到 水果 超市 买 水果 ， 苹果 每千克 4.5 元 ， 橘子 每千克 3.6 元 ， 妈妈 买 了 两种 水果 各 3 千克 ， 付 了 50 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "942", "content": "期中考试 小 明 3 科 的 平均 成绩 是 95 分 ， 数学 得 了 99 分 ， 英语 得 90 分 ， 语文 得 了 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12912", "content": "李 明 看 一 本书 ， 已经 看 了 全书 的 65% ， 没 看 的 比 看 了 的 少 90 页 ． 这 本书 共 几页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9616", "content": "少先队员 到 果园 里 摘 苹果 ， 上午 摘 了 14 筐 ， 每 筐 装 25 千克 ； 下午 又 摘 了 18 筐 ， 这 一天 一共 摘 了 890 千克 ． 下午 摘 的 苹果 每 筐 装 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2656", "content": "我们 班 有 45 人 ， 分成 3 个 小组 去 劳动 ， 平均 每个 小组 多少 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "345", "content": "彩电 厂 生产 一批 彩电 ， 上午 运走 全部 的 75% ， 下午 运走 240 台 ， 这时 已 运走 的 占 全部 彩电 的 95% ， 上午 运走 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14436", "content": "小 军 家 今年 前 6 个 月 一共 用水 90 吨 ， 平均 每个 月 用水 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21474", "content": "小 华 买 了 61 张 贺卡 ， 在 2013 年 元旦 前 寄出 了 35 张 ． 寒假 前 他 又 买 了 28 张 贺卡 ， 准备 连同 剩下 的 一起 在 春节 前 寄给 他 的 好 朋友 们 ， 这次 他 要 寄出 多少 张 贺卡 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "437", "content": "工程队 修 一条 路 ， 第一周 修 了 全长 的 (2/5) ， 第 二 周 修 了 60 米 ， 还 剩下 340 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22521", "content": "250 / 20 的 商 与 15 的 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16864", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 余下 的 (1/4) 又 5 页 ， 这时 还 剩下 70 页 没有 看 ． 这 本书 一共 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11590", "content": "计算 264 + 451 - 216 + 136 - 184 + 149 = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "20293", "content": "水果店 运 来 苹果 320 千克 ， 是 香蕉 的 4 倍 ， 运 来 的 梨 比 香蕉 多 65 千克 ， 水果店 运 来 梨 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7050", "content": "156 与 44 的 差 乘 它们 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22781", "content": "一 根 绳子 长 8 米 ， 第一次 用 去 (1/8) 米 ， 第 二 次 用 去 剩下 的 (1/4) ， 现在 这根 绳子 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3336", "content": "湖边 种 着 一排 柳树 ， 每 两棵树 之间 相距 5 米 ． 小 明 从 第 1 棵 树 跑 到 第 200 棵 树 ， 一共 跑 了 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19326", "content": "一 种 压路机 的 前轮 直径 是 1.5 米 ， 每分钟 转 10 圈 ， 压路机 每分钟 前进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1213", "content": "一 块 布料 用 去 (4/7) 米 ， 用 去 的 比 剩下 的 少 (1/7) 米 ． 这块 布料 一共 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21549", "content": "王 叔叔 买 了 一辆 摩托车 ， 按 标价 交纳 了 10% 的 消费税 后 ， 一 共用 了 7920 元 ， 这辆 摩托车 标价 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7489", "content": "一 台 电脑 原价 是 6000 元 ， 在 促销 活动 中 降低 了 600 元 出售 ， 降价 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1522", "content": "我校 六年级 上 学期 有 学生 240 人 ， 其中 男生 占 (1/4) ， 本学期 又 转 来 若干名 男生 ， 这样 男生 人数 占 六年级 总 人数 的 (1/3) ， 本学期 转 来 多少 名 男生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7896", "content": "6 年 一班 有 学生 45 人 ， 女生 占 (4/9) ． 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21366", "content": "找 规律 填 数 ： 1 、 2 、 4 、 7 、 11 、 16 、 22 、 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12767", "content": "黄花镇 修 一条 长 2.1 千米 的 河堤 ， 前 15 天 平均 每天 修 0.086 千米 ， 余下 的 要 在 9 天 内 完成 ， 平均 每天 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5367", "content": "食堂 买来 5 筐 西红柿 ， 每 筐 24 千克 ， 每千克 2 元 ， 这些 西红柿 一共 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13911", "content": "某 旅游团 共有 78 人 ， 其中 45 人 乘 大客车 ， 剩下 的 游客 分 乘 3 辆 面包车 ． 平均 每辆 面包车 坐 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12131", "content": "一 次 调查 显示 ， 我市 汽车 普及率 是 8% ， 有 1012 户 家庭 没有 汽车 ， 这次 共 调查 了 多少 户 家庭 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23077", "content": "学校 开展 课外活动 ， 参加 舞蹈队 的 同学 有 28 人 ， 参加 合唱队 的 人数 是 舞蹈队 的 2.5 倍 ， 参加 舞蹈队 和 合唱队 的 同学 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16795", "content": "农场 里 有 鹅 360 只 ， 鸡 的 只 数 比 鹅 的 3 倍 还 多 32 只 ， 农场 里 鸡 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12310", "content": "学校 拿 了 一笔 钱 给 体育 队 的 运动员 们 每人 买 一套 运动服 ， 如果 买 30 套 ， 还 剩 120 元 ， 如果 买 32 套 ， 还 剩 20 元 ， 每套 运动服 多少 钱 ？ （ 每套 运动服 价格 一样 ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17626", "content": "王 叔叔 开车 从 甲地 到 乙地 ， 每 小时 行 60 千米 ， 行 了 6 小时 ． 返回 时 由于 有 任务 ， 加快 了 速度 ， 只用 了 4 小时 就 回到 了 甲地 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3136", "content": "甲乙 两列 客车 同时 由 相距 680 千米 的 两地 同时 相对 出发 ， 甲 每 小时 行 42 千米 ， 8 小时 相遇 ， 乙 客车 每 小时 行 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2251", "content": "tcl 电脑公司 计划 加工 电脑 零件 1070 个 ， 已经 加工 了 5 天 ， 平均 每天 加工 130 个 ， 剩下 的 要 3 天 做 完 ， 平均 每天 加工 零件 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14794", "content": "水果 商店 运 来 苹果 1250 千克 ， 运 来 的 梨 比 苹果 多 530 千克 ， 运 来 的 苹果 和 梨 的 总数 正好 是 桔子 的 3 倍 ． 运 来 桔子 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15795", "content": "淘气 与 大家 有 一年 的 时间 没有 见面 了 ， 再次 见面 时 大家 都 说 淘气 长 高 了 ． 淘气 说 ： “ 我家 的 大门 高 2 米 ， 原先 我 的 身高 是 门 高 的 (3/5) ， 现在 我 的 身高 是 门 高 的 (5/8) 了 ． 我 一年 长 高 了 多少 ？ ”", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9045", "content": "城关 小学 在 一条 大路 的 一边 从头至尾 栽树 28 棵 ， 每隔 6 米 栽 一棵 ， 这 条 路 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22156", "content": "多少 吨 的 6 倍 是 (12/13) 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2895", "content": "一 个 手机信号 发射 接收 塔 埋 在 地下 与 露出 地面 部分 的 比 是 3 ： 18 ， 埋 在 地下 的 部分 是 4 米 ， 那么 这个 塔 的 全长 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15723", "content": "(2/9) 的 (9/10) / 20 与 18 的 差 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4660", "content": "一 辆 汽车 从 建湖 到 南京 ， 行驶 了 5 小时 ， 以 同样 的 速度 从 南京 到 上海 用 了 4 小时 ． 建湖 到 南京 的 公路 长 340 千米 ， 南京 到 上海 的 公路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12573", "content": "一 个 圆柱形 容器 的 底面 直径 是 10 厘米 ， 里面 盛 有 水 ． 把 一块 铁块 全部 浸入 水中 ， 水面 上升 2 厘米 ， 这块 铁块 的 体积 = ．", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "19523", "content": "王师傅 加工 一批 零件 ， 第一天 加工 了 总数 的 20% ， 第 二 天 加工 了 总数 的 (2/15) ， 还 剩下 160 个 零件 ， 这 批 零件 共 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10482", "content": "修筑 一条 水渠 ， 8 天 已 筑 了 这 条 水渠 的 (8/15) ． 照 这样 计算 ， 筑 完 这 条 水渠 共 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22128", "content": "甲 、 乙 两 人 同时 合 打 一份 7000 字 的 稿件 ， 甲 每 小时 打 600 字 ， 乙 比 甲 每 小时 多 打 200 字 ， 经过 多少 小时 可以 完成 任务 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20660", "content": "校园 里 有 杨树 60 棵 ， 柳树 是 杨树 的 (9/10) ， 柳树 是 槐树 的 (2/3) ， 槐树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12462", "content": "某种 铁矿石 的 出 铁 率 是 45% ， 现已 炼 出 纯铁 90 吨 ， 则 需 这 钟 铁矿石 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3024", "content": "一 条 绳 长 2 米 ， 剪 去 (4/5) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8915", "content": "一 列 火车 从 甲地 到 乙地 ， 速度 是 145 千米 / 时 ， 行 了 18 小时 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19300", "content": "某 厂 计划 6 月份 生产 彩电 585 台 ， 实际 每天 产量比 原 计划 增加 (2/13) ， 照 这样 计算 ， 可以 提早 少 天 完成 生产 计划 ？ （ 按 30 天 计算 ）", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17925", "content": "小 巍 带 着 一条 猎狗 骑车 离家 到 36 千米 远 的 招宝山 郊游 ， 他 骑车 速度 是 每 小时 18 千米 ， 猎狗 奔跑 速度 是 骑车 速度 的 2 倍 ． 当 猎狗 跑 到 招宝山 脚下 后 ， 如 小 巍 还 未 到 ， 则 马上 返回 迎 着 小 巍 跑 去 ， 遇到 小 巍 后 再 跑 向 招宝山 … 这样 来回 跑 一直 到 小 巍 到 招宝山 为止 ． 这时 ， 这 只 猎狗 一共 跑 了 多少 千米 路 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1129", "content": "一 种 电冰箱 原价 2500 元 ， 现在 每 台 售价 2460 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18473", "content": "爱心 一日 捐 活动 中 ， 四年级 捐款 240 元 ， 五年级 捐款 是 四年级 的 2 倍 ， 六年级 捐款 比 4 、 五年级 的 总数 少 108 元 ， 六年级 的 捐款 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3275", "content": "王 大伯 带 800 元 买 化肥 ， 每 袋 化肥 42 元 ， 买 化肥 后 剩下 170 元 ， 王 大伯 买 化肥 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22406", "content": "一 份 稿件 共 5400 个 字 ， 小 明 录入 了 这份 稿件 的 (7/9) ， 还 剩 多少 字 没 录入 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22535", "content": "同学 们 到 苗圃 挖 树苗 ． 3 个 小组 挖 树苗 300 株 ． 照 这样 计算 ， 又 来 了 12 个 小组 ， 一共 可以 挖 树苗 多少 株 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22085", "content": "一 个 房地产 开发 公司 ， 今年 上半年 1 月份 卖出 15 套 新房 ， 2 月份 卖出 25 套 新房 ， 3 月份 卖出 20 套 新房 ， 4 月份 卖出 16 套 新房 ， 5 、 10 月份 共 卖出 11 套 新房 ． 这 半年 中 平均 每个 月 卖出 多少 套 新房 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11749", "content": "2007 年 5 一 黄金周 期间 ， 蒙山 旅游区 接待 游客 占 全市 接待 游客 的 30% ， 莒南 天 佛山 旅游区 接待 旅客 占 全市 接待 游客 的 5% ， 天 佛山 旅游区 比 蒙山 旅游区 少 接待 游客 42 万人次 ． 全市 一共 接待 游客 多少 万人次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15045", "content": "六年级 做 了 42 面 小 彩旗 ， 五年级 做 的 比 六年级 少 (2/7) ． 五年级 做 了 多少 面 小 彩旗 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11011", "content": "一 本 480 页 的 书 ， 看 了 60% ， 还 剩 多少 页 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11255", "content": "一 辆 自行车 的 价格 是 195 元 ， 一辆 摩托车 的 价格比 自行车 的 价格 的 19 倍 还 多 65 元 ． 摩托车 的 价格 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16080", "content": "金星 绕 太阳 一周 需要 225 天 ， 是 地球 绕 太阳 一周 的 (45/73) ， 水星 绕 太阳 一周 的 时间 比 地球 绕 太阳 一周 的 (18/73) 少 2 天 ． 谁 星 绕 太阳 一周 要 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3169", "content": "两个 数 的 积 是 70 ， 一个 因数 扩大 100 倍 ， 另 一个 因数 缩小 到 原来 的 (1/10) ， 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6736", "content": "挖 一条 水渠 两周 挖 完 ， 第一周 挖 了 全长 的 40% ， 比 第 二 周 少 挖 了 120 米 ， 这 条 水渠 共有 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21683", "content": "实验 小学 要 为 3 、 四年级 的 学生 每人 买 一本 价格 为 12 元 的 作文 辅导书 ． 已知 三年级 有 145 人 ， 四年级 有 155 人 ， 两个 年级 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4534", "content": "17 / 6 的 商用 分数 表示 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21218", "content": "一 个 作业 小组 收割 了 1.82 公顷 小麦 ． 已经 工作 了 3 小时 ， 收割 了 0.78 公顷 的 小麦 ； 照 这样 ， 计算 ， 要 全部 收割 完毕 ， 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17347", "content": "春节 期间 ， 学校 在 校内 中心 路 一边 两端 的 路灯 间 ， 每隔 5 米 挂 一个 灯笼 ， 一共 挂 了 25 个 ． 学校 中心 路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6962", "content": "小 明 今年 12 岁 ， 爸爸 40 岁 ． 在 小 明 多少岁 的 时候 ， 爸爸 的 年龄 是 小 明 的 5 倍 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22997", "content": "甲 、 乙 两地 相距 300 千米 ， 客货 两车 从 甲 、 乙 两地 同时 出发 ， 客车 平均 每 小时 行 80 千米 ， 货车 平均 每 小时 行 60 千米 ， 2.5 小时 后 ， 两车 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6011", "content": "李 明 看 一本 故事书 ， 第一天 看 了 全书 的 25% ， 第 二 天 看 了 全书 的 (1/3) ， 还 剩下 35 页 没有 看 ， 李 明 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9154", "content": "酒精 的 沸点 是 华氏 173.3 度 ， 已知 华氏温度 = 摄氏温度 * 1.8 + 3.2 ， 如果 把 酒精 沸点 用 摄氏度 表示 ， 应为 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17395", "content": "王老师 坐车到 省城 开会 ， 汽车 的 平均速度 是 每 小时 58.4 千米 ， 王老师 坐车 用 了 4.5 小时 到达 省城 ． 汽车 行走 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5235", "content": "粮店 有 60 袋 粮食 ， 有 35 袋 大米 ， 其余 是 面粉 ． 大米 比 面粉 多 多少 袋 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10137", "content": "糖 与 水 的 比 是 1 ： 7 ， 现有 糖 30 克 ， 可调 成 这样 的 糖水 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19450", "content": "小 明 爸爸 将 5000 元 存入 银行 ， 定期 2 年 ， 年利率 2.70% ， 利息税 20% ． 到期 后 ， 他 爸爸 从 银行 取回 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "519", "content": "王 大伯 的 果园 里 梨树 占 25% ， 苹果树 占 40% ， 苹果树 比 梨树 多 300 棵 ． 王 大伯 的 果园 里 共有 多少 棵 梨树 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16276", "content": "果园 有 桃树 和 苹果树 各 24 行 ， 桃树 每行 18 棵 ， 苹果树 每行 15 棵 ， 苹果树 比 桃树 少 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12786", "content": "甲 、 乙 两车 同时 从 相距 450 千米 的 两地 相向 而 行 ， 3.6 小时 相遇 ， 甲 车 每 小时 行 65 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18639", "content": "学校 准备 发 练习本 ， 发给 12 个 班 ， 每班 122 本 ， 还 需要 留 36 本 作为 备用 ． 学校 应 买 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15800", "content": "人体 的 血液 大约 占 体重 的 (1/13) ， 血液 里 大约 有 (2/3) 是 水 ． 小 明 的 体重 是 52 千克 ， 他 的 血液 里 大约 含水 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19609", "content": "李 飞身 高 128 厘米 ， 是 妹妹 身高 的 2 倍 ， 而 爸爸 身高 比 妹妹 高 110 厘米 ． 爸爸 的 身高 = 多少 厘米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12554", "content": "甲 、 乙 、 丙 3 种 糖果 每千克 的 价格 分别 是 9 元 ， 7.5 元 ， 7 元 ． 现 把 甲种 糖果 5 千克 ， 乙种 糖果 4 千克 ， 丙种 糖果 3 千克 混合 在 一起 ， 那么 用 10 元 可 买 多少 千克 这种 混合 糖果 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "19581", "content": "一 种 电子产品 合格率 为 90% ， 如果 生产 一批 2000 只 ， 不 合格 产品 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2080", "content": "张老师 将 存 了 5 年 的 钱 取出 来 ， 已知 年利率 为 2.43% ， 利息 是 97.2 元 ， 他 当时 存 了 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10157", "content": "两辆 汽车 同时 从 唐 山 开往 北京 ， 1.5 小时 后 乙 车 落 在 甲 车 后面 30 千米 ． 甲 车 每 小时 行驶 90 千米 ． 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13435", "content": "一 辆 汽车 从 甲地 到 乙地 ， (5/3) 小时 行 了 150 千米 ， 正好 行 了 全程 的 (5/6) ， 照 这样 计算 ， 这辆 汽车 行 完全 程 共用 多少 个 小时 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21911", "content": "李 大伯 参加 了 农村 合作 医疗保险 ． 按 条款 规定 ： 农民 住院 医疗费 设 起 付 线 ， 县级 医疗机构 起 付 线 为 400 元 ， 在 起 付 线 以上 的 部分 按 45% 报销 ； 镇级 医疗机构 起 付 线 为 100 元 ， 在 起 付 线 以上 的 部分 按 70% 报销 ． 即 ： 报销 费 = （ 医疗费 - 起 付 线 ） * 报销 率 ． 今年 5 月份 李 大伯 患 了 急性 阑尾炎 ， 在 定点 镇级 医院 住院治疗 了 10 天 ， 医疗 费用 共计 4200 元 ． 按 条款 规定 ， 李 大伯 可以 报销 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5097", "content": "小 敬 读 一 本书 ， 已 读 的 页数 比 全部 的 (2/5) 少 48 页 ， 这时 还 剩 这 本书 总 页数 的 75% ， 已 读 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8928", "content": "我 今年 36 岁 ， 小强 的 年龄 是 我 的 年龄 的 (1/3) ， 那么 小强 今年 多少岁 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14957", "content": "我们 原 计划 每天 加工 160 个 零件 ， 12 天 完成 ． 实际 提前 4 天 完成 了 任务 ． 他们 实际 每天 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8935", "content": "婷婷 有 30 元 钱 ， 买 书 用 去 15.6 元 ， 买 笔 用 去 8.8 元 ． 还 剩 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16465", "content": "一 个 比 的 后 项 是 8 ， 比值 是 (3/4) ， 这个 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18204", "content": "一 根 绳 长 60 米 ， 用 去 20% ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "580", "content": "某 修路 队 每天 修路 80 米 ， 修 了 18 天 后 ， 还 剩 560 米 没 修 ， 若 这 条 路 40 天 修 完 ， 则 每天 比 原来 少 修 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1383", "content": "把 48 平均 分成 4 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19656", "content": "学校 买来 绳子 135 米 ， 先剪 下 9 米 做 了 5 根 跳绳 ， 照 这样 计算 ， 剩下 的 绳 于 可以 做 这样 的 跳绳 多少 根 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22053", "content": "一 个数 的 (1/2) 是 30 ， 它 的 (4/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11496", "content": "一 根 电线杆 ， 埋 在 地下 的 部分 占 全长 的 (2/13) ， 露 在 地面 地 部分 是 5 米 ． 这根 电线杆 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11182", "content": "把 一个 数 乘以 4 ， 加上 84 ， 再 减去 20 ， 最后 除以 2 ， 这时 得 100 ， 那么 这个 数 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16722", "content": "买 一幢 房子 ， 分期付款 要 加价 9% ， 如果 改为 现金 购买 可 享受 “ 0.95 ” 优惠 ． 王 叔叔 算了 一下 ， 发现 分期付款 比 现金 购买 要 多付 42000 元 ， 这幢 房子 原价 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22203", "content": "一 共有 280 kg 水果糖 ， 每 袋装 (1/4) kg ， 已经 装完 了 这些 糖果 的 (3/4) ． 已经 装完 了 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23058", "content": "在 公路 的 一侧 ， 每隔 2 米 插 一面 彩旗 （ 两端 都 插 ） ， 共 插 了 50 面 ， 这 条 公路 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4023", "content": "海豚 每 小时 游 50 千米 ， 箭鱼 游 的 速度 比 海豚 的 2 倍 还 多 19 千米 ， 箭鱼 每 小时 游 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21111", "content": "甲乙 两队 同 挖 一条 渠 ， 甲队 每天 挖 20 米 ， 乙 队 每天 挖 40 米 ， 15 天 正好 挖 完 ， 这 条 水渠 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2290", "content": "请 你 在 算式 1 + 2 * 3 + 4 * 5 + 6 中 添 上 一个 小括号 ， 使 算式 的 得数 最大 ， 最大 的 得数 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "13048", "content": "五年级 同学 参加 数学 兴趣小组 的 有 48 人 ， 比 参加 写作 小组 的 人数 多 20% ， 参加 写作 小组 的 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7320", "content": "清河 学校 购买 庆祝 “ 十8 大 ” 演出服 50 套 ， 共用 了 7200 元 ， 每件 上衣 80 元 ， 每 条 裤子 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11471", "content": "两个 修路 队 修路 、 第一队 修 了 1840 米 ， 比 第 二 队 少 修 408 米 ， 两个 队 共 修 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14617", "content": "一 本 故事书 560 页 ， 第一周 看 了 全书 的 (2/7) ， 第 二 周 看 了 全书 的 (3/8) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "14800", "content": "一 辆 重型车 的 载重 是 8 吨 ， 一辆 轻型车 载重量 是 5 吨 ， 现 要 把 一批 煤 送到 工厂 ， 两车 同时 送 了 12 趟 ， 这 批 煤 有 几吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3260", "content": "3 （ 1 ） 班上 体育课 ， 站 了 4 行 ， 每行 12 人 ， 如果 每行 站 8 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8335", "content": "一 个 平行四边形 的 面积 是 60 cm ^ 2 ， 如果 它 的 高 缩小 3 倍 ， 底 不变 ， 面积 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18234", "content": "一 个数 除以 6 ， 商 是 11 ， 余数 是 4 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20744", "content": "小 明 看 一 本书 ， 第一天 看 了 (1/9) ， 第 二 天 看 了 (2/9) ， 还 剩 多少 没有 看 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10404", "content": "果园 今年 收获 苹果 45 吨 ， 比 去年 增产 5 吨 ， 比 去年 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22251", "content": "小麦 的 出粉率 是 80% ， 面粉厂 要 磨 出 1800 千克 面粉 ， 需要 小麦 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9142", "content": "一 份 稿件 共 975 个 字 ， 刘 刚 13 分钟 打 完 ， 李 正 15 分钟 打 完 ． 刘 刚 每分钟 比 李 正 多 打 多少 字 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4798", "content": "为 适应 提速 要求 ， 一段 铁路 需要 更换 铁轨 ， 用 每 根 12 米 长 的 新 铁轨 ， 换下 每 根 长 为 9 米 的 旧 铁轨 ． 这 段 铁路 原来 有 168 根 铁轨 ， 需 换成 多少 根 新 铁轨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3919", "content": "某 运动服装 店老板 ， 为了 提高 销售额 ， 先 将 所有 商品 提价 20% ， 而后 宣传 说 ： “ 为了 资金 回收 ， 所有 商品 0.8 优惠 ， 欲购从速 ． ” 请 你 算 一 算 ， 一件 没有 提价 前 标价 400 元 的 运动装 ， 现在 售价 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9017", "content": "学校 买 了 4 台 电脑 用 了 12200 元 ， 学校 还 想 再 买 3 台 这样 的 电脑 ， 还 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2624", "content": "多少 的 (3/8) 是 (4/7) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13261", "content": "学校 买来 各种 球 ， 其中 足球 占 总数 的 (3/8) ， 篮球 占 总数 的 (2/5) ， 其余 的 是 排球 ， 排球 占 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5415", "content": "计算 ： 2004 + 2005 + 2006 + 2007 + 2008 + 2009 + 2010 = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "19579", "content": "一 本 科幻 书 186 页 ， 明明 看 了 6 天 后 还 剩 42 页 ， 她 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17131", "content": "在 两幢 楼 中间 每隔 3 米 种 1 棵 树 ， 共 种 了 20 棵 ， 这 两幢 楼 之间 距离 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4101", "content": "一 部手机 原价 是 2400 元 ， 现 降价 了 (1/10) ， 问 手机 现价 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14994", "content": "学校 要 栽种 一批 树苗 ， 这 批 树苗 的 成活率 在 75% ～ 80% 之间 ． 如果 要 保证 栽 活 120 棵 树 ， 至少 应 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20678", "content": "本月 产量比 上 月 超产 (3/8) ， 本月 产量 是 上 月 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17543", "content": "从 甲地 到 乙地 ， 骑 自行车 每 小时 15 千米 ， 8 小时 到达 ， 如果 坐 汽车 ， 只要 2 小时 ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19682", "content": "小 王 、 小 李 从 甲 、 乙 两地 同时 出发 ， 背向 而 行 ， 小 王 每 小时 行 4.8 千米 ， 小 李 每 小时 行 4.4 千米 ， 经过 2.5 小时 ， 两 人 相距 31.5 千米 ， 求 甲 、 乙 两地 间 的 距离 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18566", "content": "每箱 可乐 48 元 ， 卖 了 17 箱 ， 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14914", "content": "李 叔叔 家 到 公司 的 路程 全长 900 米 ． 他 计划 9 分钟 骑车 从 家 到 公司 ， 实际 比 计划 少 用 了 3 分钟 ． 实际 平均 每分钟 骑 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22622", "content": "一 本书 200 页 ， 读 了 20% ， 还 剩下 多少 页 没有 读 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20591", "content": "一 根 绳子 用 去 (1/5) ， 还 剩 (3/5) 米 ， 这根 绳子 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17213", "content": "振华 养殖场 有 鹅 530 只 ， 鸭 的 只 数 是 鹅 的 3 倍 ， 鸡 的 只 数 比 鹅 和 鸭 的 总数 多 80 只 ， 鸡 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "83", "content": "小 军 的 身高 为 145 cm ， 比 他 父亲 身高 的 (5/6) 少 5 cm ， 他 父亲 的 身高 = 多少 厘米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11399", "content": "目前 ， 全球 荒漠化 土地 面积 达到 3600 万 平方千米 ， 占 陆地 总面积 的 (1/4) ， 而且 每年 仍 按 5 万 至 7 万 平方千米 （ 平均 6 万 平方千米 ） 的 速度 扩展 ， 土地 荒漠化 已 成为 全球 生态 的 “ 头号 杀手 ” ． 全世界 受 荒漠 危害 的 国家 达 110 多个 ， 10 亿 人口 受到 直接 威胁 ． 如 不 制止 ， 多少 年 后 地球 上 连 一根 草 都 看不到 了 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12235", "content": "125 与 12 的 和 的 8 倍 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1625", "content": "猪 8 戒 3 天 吃 了 12 个 大饼 ， 那么 他 8 天 能 吃 多少 个 大饼 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20256", "content": "一 台 压路机 的 滚筒 长 1.2 米 ， 直径 0.5 米 ， 如果 它 在 马路上 滚动 10 圈 ， 所 压 路面 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "23136", "content": "新兴 小区 新建 了 25 栋 楼房 ， 每栋 有 9 层 ， 每层 有 8 户 ． 新建 的 楼房 可 住 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14546", "content": "甲 、 乙 两艘 汽艇 同时 从 两地 相对 开出 ， 甲 艇 每 小时 行 24 千米 ， 乙 艇 每 小时 行 27 千米 ， 经过 3 小时 两 艇 还 相距 8 千米 ． 两地 之间 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14052", "content": "一 本 故事书 共 160 页 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 全书 的 (2/5) ， 若 第 3 天 接着 看 ， 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13599", "content": "工程队 挖 一条 600 米 的 山洞 ， 第一个 月 挖 了 全长 的 20% ， 第 二 个 月 挖 了 全长 的 (1/4) ， 再 挖 多少 就 可以 完工 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3555", "content": "38.5 是 7 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11079", "content": "2007 年 我国 火车 第 6 次 提速 ， 某次 火车 速度 从 每 小时 160 千米 提高 到 200 千米 ， 火车 速度 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13815", "content": "期末考试 张老师 花 去 28.8 元 买来 6 本 日记本 ， 奖给 满分 的 同学 ， 每 本 日记本 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18931", "content": "一 件 羊毛衫 的 价钱 208 元 ， 大衣 的 价钱 是 羊毛衫 的 4 倍 ． 一件 大衣 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20068", "content": "星期 6 同学 们 分 4 批 去 参观 ， 上午 有 3 批 学生 参观 ， 每批 169 人 ， 第 4 批 下午 去 参观 有 193 人 ， 去 参观 的 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2828", "content": "一 辆 汽车 每 小时 行 48 千米 ， 384 千米 的 路程 要 用 多少 小时 才能 行 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12023", "content": "育英 小学 六年级 一班 第一 小组 在 一次 数学 测验 中 ， 有 3 人 得 100 分 ， 4 人 得 96 分 ， 其余 5 人 共 得 348 分 ． 第一 小组 这次 数学 测验 的 平均 成绩 = 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "3835", "content": "小 明 现在 的 体重 是 30 千克 ， 比 去年 增加 了 (1/5) ． 小 明 去年 体重 = 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23105", "content": "猎豹 每 小时 跑 110 公里 ， 野马 每 小时 跑 55 公里 ， 猎豹 的 速度 是 野马 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9084", "content": "一 种 商品 原价 80 元 ， 现在 打 0.8 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8978", "content": "五年级 有 学生 220 人 ， 六年级 比 五年级 多 15% ， 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4144", "content": "我们 班 参加 音乐 兴趣小组 的 26 人 ， 参加 美术 兴趣小组 的 有 28 人 ， 其中 8 人 两组 都 参加 ， 参加 这 两个 兴趣小组 的 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "289", "content": "540 米 = 多少 米 的 20% ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6499", "content": "一 部手机 现价 1600 元 ， 比 原价 便宜 了 400 元 ， 便宜 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5982", "content": "一 本书 120 页 ， 小 红 读 了 它 的 (1/3) ， 还 剩 这 本书 的 多少 没 读 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7040", "content": "水族馆 有 大 金鱼 160 尾 ， 小 金鱼 的 尾数 是 大 金鱼 的 20 倍 ， 一共 有 金角 多少 尾 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "605", "content": "鳗鱼 的 寿命 一般 是 55 年 ． 在 人工 饲养 条件 下 金鱼 的 寿命 是 鳗鱼 的 (6/11) ． 金鱼 的 寿命 = 多少 年 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8300", "content": "在 “ 绿色 造林 ” 活动 中 ， 计划 投入 1.6 万元 ， 实际 投入 2 万元 ． 计划 投入 比 实际 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10371", "content": "吴 山 农场 去年 种 小麦 150 公顷 ， 今年 比 去年 增加 了 (1/5) ， 今年 种 小麦 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7779", "content": "四年级 一班 同学 去 爬山 ． 上山 用 了 4 小时 ， 速度 是 450 米 / 时 ． 下山 时 只用 了 3 小时 ， 下山 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9986", "content": "5 年 一班 有 学生 65 人 ， 其中 有 女生 30 人 ， 女生 占 全班 总 人数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "308", "content": "一 个 林场 去年 植树 20000 棵 ， 今年 比 去年 多 10% ， 今年 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8533", "content": "甲 数 的 (3/5) 与 乙 数 的 (7/8) 相等 ， 甲 数 是 35 ， 乙 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13625", "content": "一 根 钢管 长 12 米 ， 平均 锯 成 6 段 ． 每 锯下 一段 需 2 分钟 ， 锯 完 要 花 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11714", "content": "博爱 小学 六年级 有 学生 160 人 ， 已经 达到 体育锻炼 健康 标准 的 占 (5/8) ， 而 “ 达标 ” 学生 中 男生 占 (3/5) ， 问 “ 达标 ” 学生 中 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8998", "content": "食堂 有 57 袋 大米 ， 已经 吃 了 12 袋 ， 剩下 的 如果 每天 吃 9 袋 ， 还 可以 吃 多少 天 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2194", "content": "六年级 （ 1 ） 班 的 男生 占 全班 人数 的 (2/5) ， 女生 有 18 人 ． 男生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17785", "content": "小 明 买 了 两本书 ， 《 格林童话 》 18.5 元 ， 比 《 新华字典 》 多 7.5 元 ． 小 明 给 了 售货员 30 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13650", "content": "一 个 平行四边形 的 底 是 5 米 ， 面积 是 45 平方米 ， 它 的 高 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14822", "content": "水泥厂 去年 计划 生产 水泥 40 万吨 ， 实际 多 生产 了 8 万吨 ， 增产 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8712", "content": "两地 间 的 公路 长 342 千米 ， 甲 、 乙 两 人 骑 摩托车 分别 从 两地 相向 开出 ， 甲 每 小时 行 47.5 千米 ， 乙 的 速度 是 甲 的 (4/5) ， 经过 几小时 两 人 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11732", "content": "某 工厂 计划 第一季度 生产 机器 零件 1820 个 ， 实际 生产 了 2320 个 ， 增产 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1503", "content": "甲 数 的 (1/6) 与 乙 数 的 (1/5) 相等 ， 如果 甲 数 是 108 ， 则 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8247", "content": "一 条 1000 米 的 公路 ， 修路 队 3 天 修 了 12% ， 照 这样 的 进度 ， 这个 修路 队 修 完 这 条 公路 共 需 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6332", "content": "把 3 米 的 绳子 ， 平均 截 成 5 段 ， 每 段 是 这 条 绳子 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9191", "content": "一 张 长方形 纸 的 (3/9) 涂 红色 ， (2/5) 涂 蓝色 ． 没 涂色 部分 占 这 张 纸 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12882", "content": "红专 路 小学 四年级 共有 270 名 学生 ， 平均 每班 有 45 名 ， 这 所 小学 的 四年级 共有 多少 个 班 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2259", "content": "一 台 普通 电话机 123 元 ， 无线 电话机 的 价格 是 它 的 5 倍 ， 一台 无线 电话机 几元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3868", "content": "有 一台 电脑 ， 定价 5200 元 ， 如果 0.85 出售 ， 售价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23103", "content": "一 段 电线 ， 长 (2/5) 米 ， 截去 (1/5) 后 ， 再 接上 4 米 ， 结果 比 原来 电线 长 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "11777", "content": "两个 加数 都 是 9 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5532", "content": "服装厂 计划 生产 1640 套 服装 ， 已经 生产 了 18 天 ， 还 剩 200 套 没有 生产 ， 平均 每天 生产 多少 套 服装 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10174", "content": "小胖 看 一 本书 ， 原 计划 每天 看 25 页 ， 12 天 看 完 ， 实际 10 天 就 看 完 了 ， 实际 每天 比 计划 多 看 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2647", "content": "一 位 搬运工 人 搬运 300 件 瓷器 ， 规定 每件 运费 1.5 元 ， 若 损坏 一件 瓷器 ， 不仅 不 给 运费 ， 还要 赔偿 2.5 元 ． 结果 这位 工人 只 得到 378 元 ， 这位 工人 损坏 了 多少 件 瓷器 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14781", "content": "小 华 看 一 本书 ， 第一天 看 了 全书 的 (3/8) ， 第 二 天 比 第一天 少 看 了 全书 的 (1/4) ， 还 剩下 这 本书 的 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10292", "content": "某 超市 运 来 120 箱 果汁 ， 比 运 来 的 牛奶 多 (1/4) ． 运 来 的 牛奶 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14077", "content": "一 间 长 8 米 ， 宽 6 米 的 教室 ． 用 面积 是 0.64 平方米 的 方砖 铺 地面 ， 至少 需要 方砖 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13967", "content": "图书馆 新 到 一批 图书 ， 其中 故事书 有 216 本 ， 科技 书 比 故事书 少 78 本 ， 两种 图书 共 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22541", "content": "一 个 长方体 木箱 ， 底面 长 8 分 米 ， 宽 4 分 米 ， 高 2.5 分 米 ， 这个 木箱 所 占 的 空间 = 多少 立方分米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3598", "content": "全班 44 人 排成 一行 ， 从 左 起 第 11 名 是 小 红 ， 从 右 起 第 13 名 是 小 芬 ， 小 红 和 小 芬 之间 有 多少 个 同学 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8746", "content": "北京 到 青岛 的 铁路 长 约 900 千米 ， 一列 火车 4 小时 行驶 了 全程 的 (1/3) ． 照 这样 计算 ， 从 北京 到 青岛 大约 需 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18028", "content": "荷花 村 的 池塘 里 去年 放养 了 鱼苗 940 尾 ． 今年 放养 的 鱼苗 是 去年 的 3 倍 ． 今年 比 去年 大约 多 放养 了 多少 尾 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8958", "content": "计算 ： 8.98 + 98.98 + 998.98 + 9998.98 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "98", "content": "甲乙 两列 火车 同时 从 ab 两地 相对 开出 ， 相遇 时 ， 甲乙 两车 所 行 的 路程 比 为 4 ： 5 ， 已知 乙 车 每 小时 行 72 千米 ， 甲 车行 完全 程 要 10 小时 ． ab 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11791", "content": "希望 中学 今年 栽树 1540 棵 ， 比 去年 多 栽 (5/6) ， 去年 栽树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21945", "content": "学校 买来 小 皮球 36 只 ， 是 买来 足球 的 4 倍 ． 小 皮球 与 足球 相差 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15301", "content": "芳 芳 和婷婷 去 买 同一 本书 ， 芳 芳 少 35 元 ， 婷婷 少 28 元 ， 如果 两 人 的 钱 合 起来 正好 买 这 本书 ， 这 本书 的 单价 = 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10246", "content": "商店 运 来 700 本 练习本 ， 小楷 本 是 练习本 的 (4/5) ， 汉语拼音 本 是 小楷 本 的 (5/7) ， 汉语拼音 有 几本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18729", "content": "一 种 洗衣机 原来 售价 825 元 ， 现在 只 卖 759 元 ， 降价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19965", "content": "165 与 235 的 和 乘 34 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16024", "content": "李 阿姨 用 15 千克 面粉 做 馒头 ， 每个 馒头 用 (1/8) 千克 面粉 ． 李 阿姨 把 这些 馒头 的 (4/5) 送给 了 敬老院 的 爷爷 和 奶奶 ． 李 阿姨 送 出 了 多少 个 馒头 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15288", "content": "一 箱 梨 重 36 千克 ， 吃掉 (2/3) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23088", "content": "甲 筐 苹果 重 40 千克 ， 从 甲 筐 取出 3 千克 放入 乙 筐 ， 则 乙 筐 还 比 甲 筐 少 2 千克 ． 原来 乙 筐 有 苹果 多少 千克 ． （ 5 分 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6847", "content": "小 丽 家住 7 楼 ， 小 军 家住 1 楼 ， 每 层楼 之间 有 18 级 台阶 ， 如果 小 军 去 小 丽 家 玩 ， 一共 要 走 多少级 台阶 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14932", "content": "从 甲地 到 乙地 全程 共 968 公里 ， 坐火车 大约 需要 8 小时 到达 ， 火车 平均 每 小时 行驶 多少 公里 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7146", "content": "82 与 15 的 差 ， 乘 32 与 18 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22886", "content": "妈妈 今年 38 岁 ， 比 小 芳 大 29 岁 ， 小 芳 今年 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17170", "content": "一 台 电脑 ， 原来 售价 是 7800 元 ， 降价 16% 后 ， 每 台 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6469", "content": "按 规律 填 数 ： 1 ， 3 ， 4 ， 7 ， 11 ， 多少 ， 29 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10830", "content": "甲乙 两 数 的 比 是 3 ： 5 ， 乙 数 与 甲 数 的 差 是 2.4 ， 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9409", "content": "在 一个 口袋 里 有 2 个 红球 和 8 个 黄 球 ， 从中 任意 摸 出 1 个 球 ， 摸 出 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18171", "content": "一 台 抽水机 ， 4 时 可以 浇水 3.2 公顷 ， 平均 浇水 1 公顷 需要 多少 时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5642", "content": "已知 一个 直角 梯形 的 一条 底 是 6 厘米 ， 如果 将 另 一条 底 延长 2 厘米 ， 该 直角 梯形 就 变成 一个 正方形 ， 原 直角 梯形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12780", "content": "5.6 * 0.6 的 积 减去 1.23 / 0.41 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19742", "content": "43.5 是 5 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3808", "content": "小巧 家 的 一张 方桌 ， 边长 是 80 厘米 ， 这 张 方桌 的 面积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6859", "content": "一 台 织布机 每 小时 织布 (2/5) 米 ， 织布 (2/3) 米 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3669", "content": "副食店 运 来 410 千克 面粉 ， 上午 卖出 154 千克 ， 下午 卖出 172 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7192", "content": "在 □ / 3 = 12 … 2 中 ， □ 中 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19996", "content": "粮店 有 大米 1750 千克 ， 卖 了 4 袋 ， 每 袋 重 100 千克 ， 还 剩 多少 千克 大米 没 卖 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20527", "content": "王 大 娘家 去年 收 大豆 (3/8) 吨 ， 比 收 的 玉米 少 (1/4) 吨 ． 王 大娘 去年 收 大豆 和 玉米 共 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22076", "content": "一 件 羊毛绒 休闲 大衣 面料 成分 中 化纤 占 20% ， 兔毛 占 10% ， 绵羊 绒 占 30% ， 其余 成分 是 羊毛 ， 羊毛 占 百分之几 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2652", "content": "一 根 铁丝 长 16 米 ， 第一次 用 去 全长 的 (1/6) ， 第 二 次 用 去 全长 的 (7/12) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15123", "content": "计算 ： 7.81 * 49 - 78.1 * 3.8 + 0.781 * 90 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16424", "content": "一 只 梅花鹿 高 1.47 米 ， 一只 长颈鹿 的 高 是 梅花鹿 的 4.5 倍 ． 长颈鹿 高 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3459", "content": "在 学校 的 科技 小 论文 比赛 中 ， 共 收到 180 篇 小 论文 ， 经 评比 获奖 论文 约 占 总数 的 (3/4) ， 在 获奖作品 中 有 (1/3) 是 六年级 同学 的 ， 六年级 同学 共有 多少 篇 小 论文 获奖 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2077", "content": "一 种 电冰箱 原价 2500 元 ， 现在 每 台 售价 2450 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2521", "content": "仓库 运 来 一批 钢材 36 吨 ， 第一次 用 去 它 的 25% ， 第 二 次 用 去 15 吨 ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3223", "content": "2008 / 8 与 47 的 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4014", "content": "一 条 公路 ， 3 天 修 了 25% ， 再 修 多少 天 可以 修 完 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1357", "content": "某 年级 男生 有 120 人 ， 女生 人数 比 男生 多 (1/10) ， 这个 年级 有 多少 名 学生 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15895", "content": "温岭 到 宁波 的 公路 长 270 千米 ， 一辆 汽车 走 高速 的 速度 是 90 千米 / 小时 ， 走 普通 公路 的 速度 是 30 千米 / 小时 ， 从 温岭 到 宁波 如果 走 高速 比 走 普通 公路 要 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2653", "content": "修 一条 路 ， 第一周 修 了 全长 的 (2/7) ， 第 二 周 的 比 第一周 多 这 条 路 的 (1/7) ． 两周 共 修 了 这 条 路 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8075", "content": "兄弟 二 人 从 100 米 跑道 的 起点 和 终点 同时 出发 ， 沿 同一 方向 跑步 ， 弟弟 在 前 ， 每分钟 跑 120 米 ； 哥哥 在 后 ， 每分钟 跑 140 米 ． 几分钟 后 哥哥 追 上 弟弟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21707", "content": "儿童公园 上午 入 园 人数 是 950 人 ， 到 中午 12 时 有 276 人 出 园 ， 这时 公园 内 还 剩 多少 位 游客 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4606", "content": "汽车 从 甲地 开往 乙地 ， 去 时 的 速度 是 66 千米 / 时 ， 共用 了 4 小时 ． 返回 时 少 用 了 1 小时 ， 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5862", "content": "今年 爸爸 的 年龄 是 42 岁 ， 儿子 的 年龄 比 爸爸 少 (2/3) ． 你 知道 儿子 今年 几岁 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5920", "content": "阳光 仪器厂 要 制作 400 套 教具 ， 计划 25 天 完成 任务 ， 实际 每天 比 原 计划 多 做 4 套 ， 实际 完成 原 生产 任务 要 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1980", "content": "配制 一种 盐水 ， 盐 和 水 的 重量 比 是 1 ： 3 ， 盐 是 盐水 重量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3443", "content": "小 红 看 一 本书 ， 第一天 看 全书 的 (1/4) ， 第 二 天 看 全书 的 (2/5) ， 还 剩 98 页 没 看 ， 全书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16977", "content": "星空 电影院 每排 有 15 个 座位 ， 一个 3 口 之 家 去 看 电影 ． 要 买 第 20 排 的 连 座票 ， 一共 有 多少 种 不同 的 拿 法 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8367", "content": "一 个数 的 2 倍 与 (3/4) 的 和 是 (11/6) ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2458", "content": "一 件 衣服 ， 打 0.9 后 便宜 了 45 元 ， 这件 衣服 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15959", "content": "小 红 看 一 本书 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 了 全书 的 20% ， 这时 还 剩下 36 页 没有 看 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4837", "content": "一 件 上衣 的 单价 是 96 元 ， 裤子 的 单价 是 上衣 单价 的 (7/12) ． 帽子 的 单价 是 裤子 单价 的 (3/8) ． 帽子 的 单价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8295", "content": "王 强 昨天 去 图书城 买 了 一套 124 元 的 故事书 和 一套 98 元 的 科幻 书 ， 他 共 要 付给 营业员 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16064", "content": "一 个数 的 5% 是 24 ， 这个 数 的 75% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17702", "content": "机械 工厂 要 生产 6000 个 零件 ， 已经 生产 了 12 天 ， 每天 生产 180 个 ， 剩下 的 要求 15 天 完成 ， 则 剩下 的 每天 生产 多少 个 零件 才能 按时 完成 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1648", "content": "轿车 6 小时 行 432 千米 ， 比 卡车 每 小时 快 16 千米 ， 卡车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5507", "content": "把 7 千克 苹果 平均 分为 5 个人 ， 每人 分 到 苹果 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20917", "content": "张老师 带 800 元 买 书包 ． 买 了 15 只 书包 ， 剩 80 元 ． 每 只 书包 的 价钱 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12726", "content": "加工 车间 要 加工 875 个 零件 ， 已知 加工 3.5 小时 ， 平均 每 小时 加工 50 个 ， 剩下 的 平均 每 小时 加工 56 个 ． 剩下 的 零件 要 几小时 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20863", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 52 千米 ， 已 行 了 7 小时 ， 离 乙地 还有 128 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7314", "content": "2008 年 5 月 12 日 发生 的 汶川 大 地震 牵动 了 全国 人民 的 心 ， 某 食品厂 为 地震 灾区 捐赠 了 (7/8) 吨 饼干 ， 捐赠 的 方便面 是 饼干 的 (10/7) ． 如果 每箱 装入 (1/80) 吨 方便面 ， 捐赠 的 方便面 一共 要 装入 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18425", "content": "两地 间 距离 是 200 米 ， 两 人 从 两地 同时 出发 向 相反 方向 而 行 ， 3 分 后 两 人 相距 530 米 ， 甲 每分钟 走 60 米 ， 乙 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5454", "content": "四年级 同学 去 参观 科技 展览 ． 把 160 人 平均 分成 4 队 ， 每队 平均 分成 5 组 ， 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18580", "content": "商店 运 来 500 千克 橘子 ， 卖出 一些 后 ， 还 剩 (3/8) ， 卖出 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3611", "content": "一 艘 货轮 从 上海 开往 广州 ， 已经 行 了 全程 的 35% ， 这时 离 上海 280 千米 ， 上海 到 广州 的 航程 = 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8251", "content": "一 辆 货车 和 一辆 客车 从 相距 535.5 千米 的 两地 相向 开出 ， 货车 每 小时 行 78.5 千米 ， 客车 每 小时 行 74.5 千米 ， 两车 经过 几小时 在 途中 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2615", "content": "一 个 圆形 池塘 ， 它 的 周长 是 600 米 ， 每隔 5 米 栽种 一棵 柳树 ， 需要 树苗 多少 株 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22466", "content": "乙 数 比 甲 数 的 4 倍 少 24 ， 如果 甲 数 是 124 ， 那么 乙 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20296", "content": "两个 工程队 合 修 一条 路 ， 甲队 每天 修 48 米 ， 乙 队 每天 修 56 米 ， 15 天 后 完工 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22232", "content": "一 本书 120 页 ， 小 明 前 3 天 平均 每天 看 18 页 ， 剩下 的 打算 6 天 看 完 ， 平均 每天 应 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1150", "content": "某 修路 队 修 一条 公路 ， 第一天 修 了 200 米 ， 第 二 天 修 了 300 米 ， 两天 共 修 了 总长 的 (5/26) ， 这 条 公路 长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8290", "content": "某校 学生 在 操场上 排队 做操 ， 只 知 人数 在 90 ～ 110 之间 ， 如果 排成 3 列 不 多 也 不少 ； 如果 排成 5 列 则 少 2 人 ； 如果 排成 7 列 则 少 4 人 ． 共有 学生 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15380", "content": "一 包 茶叶 用 去 (3/5) ， 刚好 是 600 克 ， 这 包 茶叶 有 多重 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1260", "content": "两座 楼房 之间 相隔 60 米 ， 每隔 3 米 栽 一棵 玉兰花 （ 栽 一排 ， 两端 都 不 栽 ） ， 共 栽 了 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5801", "content": "如果 一台 彩电 的 价格 是 1800 元 ， 是 一台 电脑 的 (2/5) ， 则 一台 电脑 的 价格 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15932", "content": "甲 、 乙 、 丙 3 个 修路 队 合 修 一条 公路 ， 甲队 修 了 全长 的 40% ， 乙 队 修 了 剩下 的 75% ， 丙 队 修 了 9 千米 正好 修 完 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16615", "content": "有 46.8 米 长 的 布 ， 正好 裁成 12 件 大人 服装 和 15 件 儿童服装 ， 每件 大人 服装 用布 2.4 米 ， 每件 儿童服装 用布 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "767", "content": "一 批 300 吨 的 大米 要 运往 灾区 ． 运 了 4 车 才 运走 (2/5) ． 剩下 的 大米 还要 几车 才能 运 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1400", "content": "海信 电视机厂 5 月份 计划 生产 电视机 12000 台 ， 上旬 产 了 (2/5) ， 中旬 产 了 (9/20) ， 上旬 、 中旬 共 生产 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13468", "content": "水果 店里 有 梨 25 筐 ， 比 苹果 少 5 筐 ． 柑桔 的 筐 数 是 苹果 的 3 倍 ， 柑桔 有 多少 筐 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18423", "content": "某 列 火车 经过 一座 信号灯 的 电杆 用 了 12 秒钟 ， 通过 612 米 的 大桥 用 了 46 秒 ， 这 列 火车 的 长度 = 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10842", "content": "某 修路 队 修 一段路 ， 平均 每天 修 135 米 ， 已经 修 了 44 天 ， 还 剩 520 米 未 修好 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7771", "content": "一 根 电线 截去 (5/7) ， 余下 的 比 截去 的 短 18 米 ． 截去 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19236", "content": "布袋 里 有 4 个 红球 ， 2 个 白 球 ， 6 个 黄 球 ， 现在 从中 摸 一个 ， 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11086", "content": "玩具厂 生产 了 816 个 彩色 玻璃球 ， 每 8 个 装 一盒 ， 可以 装 几盒 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14212", "content": "3 个 筑路 队 共 筑 一条 公路 ， 甲队 筑 了 全长 的 20% ， 乙 队 筑 了 40.5 米 ， 余下 的 92.5 米 由 丙 队 完成 ， 这 一条 公路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12250", "content": "有 一块 菜地 的 一边 长 是 800 米 ， 要 沿着 这 条 边 做 一道 栅栏 ， 需 从头到尾 等 距离 地 栽 41 根 木杆 ． 每 两根 木杆 之间 相距 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15068", "content": "图书馆 有 故事书 78 本 ， 上午 借 走 37 本 ， 下午 又 还 回 28 本 ， 现在 图书馆 有 故事书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13498", "content": "一 件 衣服 打 0.8 后 是 320 元 ， 这件 衣服 便宜 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19567", "content": "三年级 二 班 有 40 个 同学 ， 其中 25 人 参加 了 美术 小组 ， 23 人 参加 了 音乐 小组 ， 有 19 人 两个 小组 都 参加 了 ． 有 多少 人 这 两个 小组 都 没 参加 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22802", "content": "高山 滑雪 的 总 路程 是 4.8 千米 ． 聪聪 每分钟 能 滑 0.35 千米 ， 已经 滑 了 12 分钟 ． 聪聪 离 终点 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16661", "content": "一 个 长方形 周长 2 米 ， 其中 一条 宽 是 (4/11) 米 ， 其中 一条 长 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8596", "content": "有 面粉 250 千克 ， 大米 比 面粉 多 (1/4) ， 大米 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13522", "content": "希望 村 修 一条 公路 ， 当 修 了 全长 的 40% 时 ， 剩下 的 长度 比 已修 的 多 128 米 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7114", "content": "在 计算 143 - 5 * 13 时 ， 先 算 多少 法 ， 再 算 多少 法 ， 结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19752", "content": "去年 果园 里 有 梨树 和 桃树 共 600 棵 ， 其中 梨树 占 总数 的 40% ． 今年 又 种 了 一些 桃树 ， 梨树 的 棵 树 不变 ， 这时 梨树 占 总数 的 30% ． 今年 桃树 和 梨树 一共 有 多少 棵 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22993", "content": "学校 教学大楼 占地面积 为 600 平方米 ， 约 是 校园 总面积 的 (3/40) ． 校园 总面积 约 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18681", "content": "合唱队 有 男生 30 人 ， 比 女生 人数 少 (1/6) ， 女生 比 男生 多 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1697", "content": "工程队 铺 一条 路 ， 计划 每天 铺 90 米 ， 20 天 可以 铺 完 ． 实际 只用 了 18 天 ， 平均 每天 铺 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11799", "content": "服装店 卖 的 两种 西服 的 价格 不同 ， 如果 甲种 西服 的 价格 提高 20% ， 乙种 西服 的 价格 降低 10% ， 那么 两种 西服 的 价格 相同 ， 原来 甲种 西服 的 价格 是 乙种 西服 价格 的 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20491", "content": "某 工厂 生产 一批 零件 ， 已 生产 了 总数 的 (5/6) ， 再生产 150 个 正好 完成 任务 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17937", "content": "500 张 白纸 的 厚度 为 5 厘米 ， 那么 ， 多少 张 白纸 的 厚度 是 45 厘米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8578", "content": "一 个数 的 (2/5) + 2.8 等于 12.8 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10967", "content": "修路 队 修 一段路 ， 第一天 修 了 80 米 ， 正好 是 这 段 路 的 20% ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9304", "content": "学校 新 购进 85 套 课桌椅 ， 每张 桌子 105 元 ， 每 把 椅子 65 元 ， 学校 一共 要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20851", "content": "一 列 火车 经过 一个 路标 用 3.5 秒 ， 通过 一座 长 300 米 的 桥 用 了 20 秒 ， 它 穿过 长 800 米 的 山洞 要 多少 秒 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21791", "content": "商店 运 来 960 千克 苹果 ， 比 运 来 的 梨 重 20% ， 运 来 的 梨 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23122", "content": "两列 火车 从 两个 车站 同时 相向 出发 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 78 千米 ， 经过 2.5 小时 两车 相遇 ． 两个 车站 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1107", "content": "一 台 电视机 按 原价 打 0.9 出售 ， 就是 把 电视机 让利 多少 销售 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2437", "content": "甲 、 乙 两车 同时 从 a 地 开往 b 地 ， 4 小时 后 ， 乙 车 到达 b 地 并且 超过 甲 车 56 千米 ， 已知 甲 车 每 小时 行 80 千米 ， 乙 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7087", "content": "昆明 拓 东 体育馆 5 号 看台 有 980 个 座位 ， 每排 有 35 个 座位 ． 这个 看台 有 多少 排 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5566", "content": "8 - (1/3) / (4/9) 的 商 ， 所得 的 差 再 乘以 1.8 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7446", "content": "小 华 录入 一份 稿件 ， 录入 了 (5/7) 后 还 剩 1400 字 ， 这份 稿件 共有 多少 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20838", "content": "某 生产 车间 前 3 天 完成 了 一周 计划 的 75% ， 如果 后 2 天 再生产 1600 个 零件 ， 就 可 超产 200 个 ． 这个 生产 车间 原 计划 生产 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "671", "content": "筑路 队 修 一条 公路 ， 第一天 修 了 (1/2) 千米 ， 比 第 二 天 少 修 (7/10) 千米 ， 两天 一共 修 了 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14723", "content": "一 个 商店 运进 9 箱 热水瓶 ， 每箱 14 个 ， 每个 热水瓶 售价 8 元 ， 一共 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18497", "content": "一 个 工厂 ， 5 人 10 天 生产 15000 个 零件 ， 照 这样 计算 ， 平均 每人每天 生产 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21058", "content": "小 丽 、 小 华 和 小 英 3 个 小朋友 折 纸鹤 ， 小 丽 折 了 26 只 ， 小 华 比 小 丽 多 折 5 只 ， 小 英 折 的 只 数 正好 是 小 丽 和 小 华 折 的 总数 的 2 倍 ． 小 英 折 了 多少 只 纸鹤 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15009", "content": "15 个 20 相加 的 和 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9642", "content": "一 块 6000 平方米 的 果园 ， 桃树 种植 面积 占 总面积 的 (2/5) ． 桃树 的 种植 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10730", "content": "修路 队 修 一条 公路 ， 计划 每天 修 180 米 ， 30 天 完成 任务 ， 实际 每天 比 计划 多 修 20 米 ， 实际 多少 天 就 完成 了 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14468", "content": "食堂 运 来 一批 大米 ， 5 天 吃 去 600 千克 ， 正 好吃 去 (3/4) ， 剩下 的 大米 还 能 吃 几天 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7614", "content": "某 修路 队 修 一条 公路 ， 第一天 修 了 200 米 ， 第 二 天 修 了 300 米 ， 两天 共 修 了 总长 的 (5/7) ， 这 条 公路 长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1672", "content": "一 个 水泥厂 ， 上午 生产 水泥 (7/8) 吨 ， 比 下午 少 生产 (1/4) 吨 ， 这个 水泥厂 一天 共 生产 多少 吨 水泥 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10471", "content": "某 招待所 8 月份 营业 收入 85000 元 ， 营业税 率 是 6% ， 应 缴 税款 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14533", "content": "东门 小学 学生 总数 的 (2/5) 等于 西门 小学 学生 总数 的 (1/3) ， 东门 小学 有 学生 320 人 ， 西门 小学 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4495", "content": "每 两个 路灯 之间 的 距离 是 35 米 ， 那么 第 1 个 路灯 7 个 路灯 相距 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3408", "content": "一 个 汽车 制造厂 ， 去年 全年 生产 8200 辆 汽车 ， 其中 下半年 比 上半年 多 生产 (1/20) ， 这个 汽车 制造厂 上半年 生产 了 多少 辆 汽车 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23094", "content": "甲乙 两个 工程队 分别 从 两端 开凿 一条 隧道 ， 甲队 每天 凿 20 米 ， 乙 队 每天 凿 23 米 ， 甲队 先 开凿 5 天 后 ， 乙 队 才 从 另一端 开始 ， 120 天 后 凿 完 ． 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17141", "content": "101 + 103 + 107 + 109 + 113 + 127 + 131 + 137 + 139 + 149 + 1030 = ．", "knowledge": ["+"], "difficulty": 0.9, "length": 21}
-{"question_id": "13661", "content": "某 项目 实际 投资 380 万元 ， 比 计划 投资 节省 20 万元 ， 节省 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14382", "content": "学校 第一次 买来 60 盆花 ， 第 二 次 买来 90 盆花 ， 如果 每 盆花 8 元 ． 两次 一共 应付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1987", "content": "某 筑路 队 要 修 一条 1500 米 的 路 ， 原 计划 60 天 修 完 ， 实际 比 原 计划 每天 少 修 10 米 ， 实际 要 修 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2071", "content": "一 个 水果店 ， 运 来 苹果 和 橘子 重量 的 比 是 3 ： 5 ， 已知 苹果 比 橘子 少 210 千克 ， 水果店 运 来 橘子 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3821", "content": "昆明 植物园 上午 来 了 游客 597 人 ， 中午 走 了 209 人 ， 下午 又 来 了 420 人 ， 现在 植物园 有 游客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7612", "content": "小 刚 把 500 元 压岁钱 存入 银行 ， 定期 一年 ， 年利率 是 2.25% ， 到期 后 应 取回 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9377", "content": "一 件 衣服 如果 打 0.9 优惠 ， 仍 可 获取 200 元 的 利润 ， 如果 打 0.8 就要 亏损 100 元 ， 这件 衣服 成本价 = 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7678", "content": "张老师 把 6000 元 钱 存入 银行 ， 整存整取 一年 ， 年利率 是 2.25% ， 到期 时 他 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17739", "content": "李 红 从 家 到 学校 ， 已经 走 了 160 米 ， 还 剩 (7/15) 没有 走 ． 李 红 家 到 学校 有 多 远 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4944", "content": "食堂 运进 一批 煤 ， 第一次 用 去 50 吨 ， 第 二 次 用 去 70 吨 ， 两次 正好 用 去 了 这 批 煤 的 (1/4) ． 这 批 煤 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3404", "content": "光明 畜牧场 养 的 肉牛 比 奶牛 少 280 头 ， 肉牛 头数 是 奶牛 的 80% ． 肉牛 有 多少 头 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18482", "content": "一 种 商品 原价 15 元 ． 涨价 20% 后 ， 又 降价 10% ， 现在 的 价格 = 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13484", "content": "蓝精灵 每天 从 家 出发 ， 到 河边 打 水 回来 ． 它 提 空桶 时 每分钟 能 走 5 米 ， 提 一个 装满水 的 桶 时 每分钟 能 走 3 米 ． 蓝精灵 离 河边 有 30 米 ， 那么 他 从 家 出发 打 一桶 水 ， 来回 一趟 共 需 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5480", "content": "工程队 铺 一条 管道 ， 前 5 天 一共 铺 了 145 米 ， 照 这样 计算 ， 再 铺 3 天 可以 完工 ． 这 段 管道 全长 有 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1701", "content": "在 算式 口 / 7 * 4 / 6 + 66 = 4100 中 ， 口 处 应 填写 的 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8883", "content": "计算 ： 1 - ( - (1/2) ) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3314", "content": "一 堆 煤 12 吨 ， 又 运 来 它 的 (1/4) ， 又 运 来 的 煤 = 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13835", "content": "小 红 用 120 元 钱 买 了 4 双 拖鞋 ， 营业员 找 了 8 元 钱 ， 每 双 拖鞋 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16859", "content": "一 个 收音机 0.75 ． 现在 买 一台 比 原来 便宜 15 元 ． 这种 收音机 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6990", "content": "一 只 蝴蝶 0.4 小时 飞行 3 千米 ， 蜜蜂 的 速度 是 它 飞行速度 的 2.4 倍 ， 蜜蜂 的 速度 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13870", "content": "一 个 因数 是 60 ， 另 一个 因数 是 188 ， 它们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18956", "content": "温度 每 上升 4 ℃ 某种 气体 体积 就 增加 5 立方厘米 ， 如果 温度 是 34 ℃ 时 ， 这种 气体 体积 是 36 立方厘米 ， 那么 温度 是 10 ℃ 时 ， 气体 体积 = 多少 立方厘米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17495", "content": "65 + 360 / （ 20 - 5 ） ， 先 算 多少 ， 再 算 多少 ， 最后 算 多少 ， 得数 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21766", "content": "服装 加工 组 有 240 米 布 ， 做 了 50 套 儿童服装 后 ， 还 剩 90 米 ， 平均 每套 儿童服装 用布 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19508", "content": "学校 建 一幢 综合楼 ， 原 计划 投资 200 万元 ， 实际 只用 了 180 万元 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9781", "content": "龙泉镇 去年 有 小学生 2800 人 ， 今年 比 去年 减少 了 0.5% ． 今年 有 小学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19373", "content": "一 件 商品 降价 40% 后 售价 120 元 ， 这件 商品 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4825", "content": "一 堆 煤 ， 先 用 去 总数 的 (2/5) ， 又 用 去 总数 的 (4/9) ， 这时 用 去 的 比 剩下 的 多 31 吨 ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22638", "content": "师徒 两 人 同时 加工 一批 零件 ， 4 小时 完成 任务 ， 已知 师傅 每 小时 加工 12 个 ， 徒弟 每 小时 加工 10 个 ， 问 完成 任务 后 ， 师傅 加工 的 零件 数 占 零件 总 个数 的 几分 之 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4875", "content": "一 辆 卡车 从 甲地 到 乙地 ， 出发 3 小时 走 了 180 千米 ， 照 这样 的 速度 ， 又 行驶 了 2 小时 到达 乙地 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8702", "content": "小汽车 的 速度 (5/6) 与 大客车 相等 ， 已知 小汽车 每 小时 行 120 千米 ， 大客车 每 小时 行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14908", "content": "900 - 86 的 5 倍 ， 再 加上 590 ， 和 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22522", "content": "水果店 运 来 一批 水果 共 3000 千克 ， 其中 苹果 占 (1/4) ， 香蕉 占 (2/5) ， 两种 水果 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14885", "content": "栽 一批 树苗 ， 成活率 是 98% ， 结果 成活 的 树苗 是 196 株 ， 原来 一共 栽 了 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1849", "content": "乙 数 比 甲 数 小 24 ， 甲 、 乙 两 数 的 比 是 5 ： 3 ， 甲 、 乙 两 数 的 和 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14826", "content": "某人 将 5000 元 存入 银行 ， 定期 2 年 ， 年利率 2.7% ， 到期 交 了 20% 的 利息税 后 ， 可以 拿到 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "6880", "content": "一 个 因数 扩大 4 倍 ， 另 一个 因数 扩大 3 倍 ， 积 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10054", "content": "一 种 商品 现价 60 元 ， 现价 比 原价 降低 了 20 元 ， 求 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11089", "content": "小 明 以 每 小时 8 千米 的 速度 沿着 一条 长 28 千米 的 环形 公路 练习 长跑 ． 他 出发 1 小时 后 ， 小 亮 有 一封 急 信 要 交给 他 ， 小 亮 以 每 小时 12 千米 的 速度 骑 自行车 ， 最快 要 多少 小时 能 把 急 信 交到 小 明 手中 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16537", "content": "甲 数 是 4800 ， 是 乙 数 的 6 倍 ， 甲 、 乙 两 数 相差 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4406", "content": "某 工厂 生产 一批 零件 ， 经 检验 已有 84 个 不 合格 ， 至少 要 有 多少 个 合格 ， 才能 确保 合格率 达到 98% ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15388", "content": "计算 ： 13 + 73 + 132 + 145 + 255 + 274 + 326 + 368 + 427 = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "8250", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 第一 小时 行驶 了 全程 的 25% ， 第 二 小时 行驶 了 90 千米 ， 这时 距 乙 城 还有 全程 的 (9/20) ． 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8008", "content": "6 一 儿童节 ， 同学 们 做 纸花 ， 六年级 做 了 120 朵 ， 五年级 做 了 100 朵 ， 六年级 比 五年级 多 做 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22576", "content": "师徒 二 人 共同 加工 一批 零件 ， 师傅 加工 了 1500 个 ， 恰好 是 这 批 零件 的 (5/7) ， 而 此时 徒弟 加工 的 个数 占 这 批 零件 的 (1/6) ， 徒弟 加工 了 多少 零件 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3885", "content": "抗震救灾 ， 我们 众志成城 ！ 希望 小学 向 再 去 捐款 ， 五年级 76 人 ， 每人 捐款 6 元 ， 六年级 98 人 ， 每人 捐 8 元 ， 两个 年级 共 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20654", "content": "小 明 看 一本 86 页 的 《 海洋 世界 》 ． 第一天 看 了 21 页 ， 第 二 天 看 了 24 页 ， 还 剩 多少 页 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11157", "content": "(19/20) - (13/20) ， 再 减去 多少 ， 差 是 (1/5) ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2566", "content": "计算 （ 34567 + 43675 + 56734 + 67453 + 75346 ） / 5 = ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9093", "content": "筑路 队 要 修 一条 长 750 米 的 公路 ， 前 12 天 平均 每天 修 40 米 ， 剩下 的 要 在 6 天 内 完成 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12956", "content": "某 公园 准备 在 路 的 一边 每隔 8 米 ， 栽 一颗 银杏树 ， 栽 了 29 棵 ， 你 知道 这 条 路 有 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2673", "content": "5 位 同学 排队 打 饭 ， 若 每位 同学 花 了 3 分钟 打 饭 ， 则 最后 一位 同学 等待 的 时间 （ 从 开始 排队 到 开始 吃饭 ） = 多少 分钟 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21608", "content": "在 第 十4 届 亚运会 上 ， 中国 代表队 获 锝 金牌 150 枚 ， 银牌 84 枚 ， 铜牌 74 枚 ， 中国队 获得 的 银牌 比 金牌 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21359", "content": "某 单元 的 8 户 居民 3 个 月 共 节约用水 38.4 吨 ， 平均 每户 每月 节约用水 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19519", "content": "前进 机器厂 生产 一种 零件 ， 每个 用 钢材 1.5 千克 ． 技术革新 后 ， 每个 节约 钢材 0.3 千克 ． 原来 做 500 个 这种 零件 的 钢材 ， 现在 可以 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6727", "content": "水果店 运进 645 千克 葡萄 ， 每 15 千克 装 一箱 ， 每箱 葡萄 能 卖 120 元 ， 这些 葡萄 一共 能 卖 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3499", "content": "爸爸 买 一套 西 服用 去 680 元 ， 裤子 的 价格 是 上衣 的 (1/3) ， 每件 上衣 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18589", "content": "一 批 小麦 放在 甲 、 乙 两个 仓库 ， 甲 仓 占 总数 的 (3/5) ， 如果 从 甲 仓 运 50 袋 到 乙 仓 ， 这时 乙 仓 就 占 总数 的 (9/20) ， 求 这 批 小麦 共有 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "576", "content": "一 辆 汽车 和 一辆 摩托车 同时 从 相距 162 千米 的 两地 出发 ， 相对 开出 ． 汽车 每 小时 行 48 千米 ， 摩托车 的 速度 是 汽车 的 1.25 倍 ， 经过 多长时间 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3847", "content": "甲 、 乙 两列 火车 分别 从 两站 同时 出发 相向 而 行 ， 甲 车 每 小时 行 118 千米 ， 乙 车 每 小时 行 135 千米 ， 经过 6 小时 两车 在 途中 相遇 ． 两站 之间 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8951", "content": "小 明 到 商店 买 了 3 个 小型 足球 付出 20 元 ， 找回 1.85 元 ， 每个 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17012", "content": "修 一条 路 ， 已经 修好 了 7.5 千米 ， 没 修 的 比 修好 的 2.2 倍 多 2.53 千米 ， 这 段 路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14877", "content": "一 桶 油 ， 第一次 倒 出 它 的 (1/6) ， 第 二 次 比 第一次 多 倒 出 20 千克 ， 这时 已 倒 出 的 油 与 剩下 的 油 的 比 是 7 ： 5 ， 这 桶 油 原来 有 多少 千克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19141", "content": "少先队员 做 小旗 ， 每天 做 32 面 ， 24 天 完成 任务 的 一半 ． 如果 剩下 的 每天 做 48 面 ， 还要 几天 可以 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2309", "content": "在 计算 2.8 + 1.2 * 0.7 时 ， 先 算 多少 法 ， 再 算 多少 法 ， 最后 的 结果 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8051", "content": "小 华 家 到 学校 有 上坡路 和 小 坡路 ， 没有 平 路 ， 共 2.4 千米 ． 小 华 每天 上学 要 走 1.1 小时 ． 已知 小 华 上坡 时 每 小时 走 2 千米 ， 下坡 时 每 小时 走 3 千米 ． 那么 小 华 放学 回家 要 走 多少 小时 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14147", "content": "某 一 学校 有 500 人 ， 其中 选修 数学 的 有 359 人 ， 选修 文学 的 有 408 人 ， 那么 两种 课程 都 选 的 学生 至少 有 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "780", "content": "一 瓶 酒 共 (5/6) 升 ， 分别 倒入 容量 是 (1/12) 升 的 小杯 里 ， 可以 倒 多少 杯 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2650", "content": "甲乙 两个 工程队 合 修 一条 路 ， 甲队 修 了 全长 的 (2/5) ， 乙 队 修 了 全长 的 (1/3) ， 甲队 比 乙 队 多 修 了 300 米 ， 这 条 路 共 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2007", "content": "同学 们 分组 玩游戏 ， 4 人 一组 、 5 人 一组 、 3 人 一组 都 少 2 人 ， 最少 有 几 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20542", "content": "学校 成立 兴趣小组 ， 参加 美术班 有 80 人 ， 参加 篮球 班 的 人数 是 美术班 的 2 倍 少 14 人 ， 参加 篮球 班 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6390", "content": "小 红 、 小 明 、 小龙 一共 做 了 120 面 小旗 ， 其中 小 红 做 了 总数 的 (1/4) ， 小 明 和 小龙 做 的 小旗 的 面 数 比 是 4 ： 5 ． 小 明 做 了 多少 面 小旗 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3696", "content": "操场上 原有 学生 40 人 ， 又 走来 25 人 ， 每 5 个人 排 一行 ， 可以 排 多少 行 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12760", "content": "一 个数 的 3 倍 是 300 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12437", "content": "某校 4 、 5 、 六年级 同学 去 影剧院 看 电影 ， 四年级 137 人 ， 五年级 143 人 ， 六年级 162 人 ， 平均 每 17 人 坐 一排 ， 需 多少 排座位 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2888", "content": "小 明 走 一条 12 千米 的 山路 ， 又 沿 原 路 返回 ， 上山 的 时候 速度 是 每 小时 2 千米 ， 下山 的 速度 是 每 小时 6 千米 ， 小 明 上 下山 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22133", "content": "育才 小学 五年级 学生 人数 是 四年级 学生 人数 的 1.1 倍 ， 如果 四年级 学生 再 转 来 20 人 ， 则 两个 年级 学生 人数 就 一样 多 ， 原来 四年级 有 学生 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5427", "content": "一 个 长方形 花坛 ， 长 是 9.6 米 ， 宽 是 6.5 米 ， 它 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7196", "content": "抽屉 里 放 着 红 、 绿 、 黄 3 种颜色 的 球 各 3 只 ． 一次 至少 摸 出 多少 只 才能 保证 每种 颜色 至少 有 一只 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13022", "content": "一 根 两米 长 的 绳子 ， 第一次 用 去 它 的 (1/3) ， 第 二 次 用 去 它 的 (1/2) ， 还 剩 它 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7897", "content": "李老师 从 成都 乘火车 去 北京 用 了 23 小时 ， 火车 每 小时 行 166 千米 ． 成都 到 北京 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2220", "content": "加工 一批 零件 ， 第一天 加工 200 个 ， 第 二 天 加工 250 个 ， 这 两天 共 加工 了 这 批 零件 的 (3/5) ． 这 批 零件 共有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "722", "content": "箱 里 放 着 同样 个数 的 铅笔盒 ， 如果 从 每 只 箱 里 拿出 30 个 ， 那么 5 只 箱 里 剩下 的 铅笔盒 的 个数 总和 等于 原来 2 只 箱 里 个数 的 总和 ． 问 原来 每 只 箱 里 有 几个 铅笔盒 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14979", "content": "修 一条 公路 ， 第一天 修 了 全长 的 (2/15) ， 第 二 天 修 了 全长 的 (3/20) ， 第 3 天 修 的 等于 前两天 的 总和 ， 还 剩 多少 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20109", "content": "李 爷爷 带 了 700 元 钱 买 饲料 ， 买 了 16 袋 后 ， 剩下 60 元 ， 每 袋 饲料 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8498", "content": "在 一段 公路 的 一边 种树 ， 先 在 起点 种 一棵 ， 以后 每隔 3 米 种 一棵 ， 一共 种 了 234 棵 ． 这 段 公路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10271", "content": "小 明 看 一本 故事书 ， 已经 看 了 全书 的 (3/7) ， 还有 48 页 没有 看 ． 小 明 已经 看 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11298", "content": "妈妈 买 了 5 千克 苹果 和 10 千克 香蕉 ， 共 付 34 元 ． 每千克 苹果 2.4 元 ， 每千克 香蕉 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21905", "content": "3.6 的 多少倍 是 7.2 的 4 倍 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13114", "content": "6 箱 蜜蜂 一年 可以 酿 390 千克 蜜 ， 小 欢 家养 了 12 箱 这样 的 蜜蜂 ， 一年 以 酿 多少 千克 蜂蜜 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7730", "content": "冰箱 厂 计划 生产 冰箱 3254 台 ， 已经 生产 了 9 天 ， 平均 每天 生产 120 台 ． 还要 再生产 多少 台 ， 才能 完成 任务 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4893", "content": "前进 小学 要 添置 28 把 小号 和 12 个 小鼓 ， 小号 每 把 45 元 ， 小鼓 每个 36 元 ． 请 你 算 一 算 ， 学校 一共 要 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15450", "content": "一 根 80 厘米 长 的 木条 ， 要 锯 成 每 段 是 4 厘米 的 小 段 ， 每 锯 一次 需要 3 分钟 （ 锯 的 时候 不能 重叠 ） ， 一共 要 用 多少 分钟 锯 完 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3294", "content": "一 块 地 ， 用 它 的 (4/7) 种 黄瓜 ， (2/7) 种 茄子 ， 其余 的 种 辣椒 ， 种 辣椒 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14200", "content": "一 段 布 ， 用 去 它 的 (2/5) ， 就 剩下 15 米 ； 若 用 去 它 的 (3/10) ， 则 用 去 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9719", "content": "沪宁 高速公路 全长 248 千米 ， 一辆 卡车 从 南京 出发 开往 上海 ， 2 小时 后 离 上海 还有 114 千米 ， 这辆 卡车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17148", "content": "一 个数 除以 16 ， 商 是 30 ， 余数 是 1 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21480", "content": "560 / 34 与 12 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11870", "content": "2010 年 的 温哥华 冬奥会 ， 中国体育代表团 获得 5 枚 金牌 ， 是 铜牌 的 (5/4) ， 获得 银牌 是 金牌 的 (2/5) ． 中国体育代表团 共 获得 多少 枚 奖牌 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12052", "content": "计算 ： （ 78.6 - 0.786 * 25 + 75% * 21.4 ） / 15 * 2009 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6523", "content": "仓库 里 原有 煤 11.58 吨 ， 又 运 来 15 吨 ， 用 去 5.85 吨 ， 还 剩下 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10053", "content": "武汉 到 北京 的 铁路 长 约 1620 千米 ． 一列 快车 从 武汉 开往 北京 ， 平均 每 小时 行 105 千米 ， 同时 有 一列 慢车 从 北京 开往 武汉 ， 经过 9 小时 两车 相遇 ． 慢车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4400", "content": "男生 和 全班 人数 的 比 是 5 ： 11 ， 女生 人数 是 男生 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "264", "content": "为 灾区 捐款 ， 小 华 捐 4.2 元 ， 比 小 丽 多 捐 了 0.4 元 ， 小 华 比 小 丽 多 捐 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10863", "content": "一 块 地 (3/4) 公顷 ， 其中 (1/4) 种 大豆 ， (1/5) 种 土豆 ， 其余 种 花生 ， 种 花生 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15356", "content": "公园 运 来 248 盆花 ， 准备 摆在 4 个 花坛 里 ． 平均 每个 花坛 摆 多少 盆花 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21404", "content": "甲乙 两队 合 修 了 一条 公路 ， 甲队 修 了 这 条 公路 的 (5/13) ， 甲队 比 乙 队 少 修 这 条 路 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13396", "content": "食堂 购进 6 箱 调味品 一共 花 了 432 元 ， 每箱 调味品 有 24 瓶 ， 每瓶 调味品 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21777", "content": "4 一班 的 张 军 和 刘 伟 两个 同学 要 合 买 一个 足球 ． 张 军 有 13.2 元 ， 刘 伟 有 16.8 元 ， 一个 足球 的 价钱 是 两 人 钱 数 总和 的 2 倍 ， 他们 要 买 一个 足球 还 差 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18673", "content": "学校 教学大楼 占地面积 为 660 平方米 ， 约 是 校园 总面积 的 (3/40) ． 操场 面积 占 校园 总面积 的 (1/4) ． 学校 操场 面积 = 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13001", "content": "一 辆 汽车 从 甲地 到 乙地 ， 已经 行 了 全程 的 (3/8) ， 剩下 的 路程 比 已经 行 的 多 20 千米 ， 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18665", "content": "小 明 有 111 张 邮票 ， 是 小强 邮票 张 数 的 (3/4) ， 小强 有 邮票 多少 张 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10222", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 平均速度 是 每 小时 行 85 千米 ， 用 了 3 小时 到达 ， 甲乙 两地 之间 的 距离 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20835", "content": "刘师傅 计划 4 天 加工 零件 640 个 ， 实际 工作效率 提高 了 (1/10) ， 实际 每天 加工 零件 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "620", "content": "学校 舞蹈队 里 有 18 名 男生 ， 女生 人数 是 男生 的 2 倍 ． 舞蹈队 男 、 女生 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18357", "content": "一 个数 的 1.2 倍 是 240 ， 这个 数 的 6 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22803", "content": "2008.20088 / 2.008 若 商 取 1000.1 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7796", "content": "奶奶 从 楼房 的 一楼 走 到 4 楼 ， 需要 24 分钟 ， 照 这样 计算 ， 她 如果 从 楼房 的 一楼 走 到 6 楼 ， 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9343", "content": "学校 用 120 元 买 了 5 箱 胶水 ， 每箱 24 瓶 ， 每瓶 胶水 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1027", "content": "在 长 12 cm 、 宽 9 cm 的 长方形 中 ， 剪出 一个 最大 的 正方形 ， 正方形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19660", "content": "96 与 80 的 和 除以 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4547", "content": "3 个 小朋友 吃 6 支 冰淇淋 平均 用 8 分钟 ， 那么 现在 同时 给 3 （ 1 ） 班 50 个 小朋友 每人 发 一支 冰淇淋 ， 大约 在 多少 分钟 内 吃 完 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1819", "content": "商店 为 比赛 特制 了 360 个 粽子 ， 每 2 个 装 一袋 ， 每 3 袋装 一盒 ， 一共 装 了 多少 盒 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12423", "content": "果园 里 有 梨树 240 棵 ， 桃树 棵 数 是 梨树 的 (1/6) ， 橘树 棵 数 是 桃树 的 (7/8) ， 橘树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3882", "content": "一 家 养鸡场 养 有 公鸡 240 只 ， 母鸡 是 公鸡 的 24 倍 ， 这个 养鸡场 一共 养 有 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9747", "content": "养殖场 有 鸡 360 只 ， 鹅 的 只 数 是 鸡 的 (7/9) ， 又 比 鸭 多 (1/3) ， 鸭 有 多少 只 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17647", "content": "菜 站 有 一批 白菜 ， 第一天 卖出 了 40% ， 第 二 天 卖出 了 90 千克 ， 这时 卖 了 的 与 没 卖出 的 比 是 5 ： 3 ， 第一天 卖出 了 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "245", "content": "王大爷 家 今年 收 稻谷 4800 千克 ， 比 去年 增产 (1/4) ， 去年 收 稻谷 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10445", "content": "一 根 电线 接上 (2/5) 米 后 长 (8/5) 米 ， 这根 电线 原来 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21829", "content": "校门口 有 一条 路 长 50 米 ， 路 的 两边 从头到尾 都 种 上 树 ， 每隔 2 米 种 一棵 ， 一共 要 种 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22296", "content": "某 化肥厂 5 月份 生产 3000 吨 水泥 ， 比 计划 多 生产 600 吨 ， 超过 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10812", "content": "3.6 * 31.4 + 81.4 * 6.4 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7594", "content": "饲养 组 买来 35 只 黑 兔 ， 10 只 白兔 ， 一共 买来 多少 只 兔子 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12365", "content": "养鸡场 养 肉鸡 10 万 只 ， 第一次 卖出 总数 的 (1/5) ， 第 二 次 卖出 总数 的 25% ， 还 剩 多少 万 只 鸡 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3217", "content": "甲 仓 有 粮食 若干 ， 运出 3.5 吨 后 ， 剩下 的 比 运走 的 多 1.7 吨 ， 甲 仓 原来 存有 粮食 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16959", "content": "果园 里 的 桃树 比 杏树 多 39 棵 ， 杏树 的 棵 数 是 桃树 的 70% ， 桃树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11800", "content": "果园 梨树 与 桃树 的 比 是 5 ： 7 ， 梨树 有 200 棵 ， 桃树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22720", "content": "一 间 客厅 长 5.5 米 ， 宽 4.2 米 ． 如果 用 每块 面积 为 0.3 平方米 的 地砖 铺 地 ， 至少 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5823", "content": "某 修路 队 修 一段路 ， 原 计划 每天 修 420 米 ， 15 天 修 完 ， 实际 只用 了 12 天 ， 实际 每天 比 原 计划 多 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11012", "content": "果园 收获 了 300 箱 苹果 和 260 箱 梨 ． 一辆 卡车 每次 运 40 箱 ， 多少 次 才能 全部 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10620", "content": "一 列 火车 3 小时 行 312 千米 ， 一辆 汽车 5 小时 行 260 千米 ． 火车 的 速度 是 汽车 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15999", "content": "食堂 买来 4 袋 面粉 ， 每 袋 45 千克 ， 每千克 面粉 2 元 ． 买 这些 面粉 一 共用 去 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19986", "content": "甲 、 乙 两地 相距 120 千米 ， 一辆 汽车 从 甲地 开往 乙地 用 了 3 小时 ， 返回 时 用 了 2 小时 ， 这辆 汽车 往返 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11198", "content": "奶奶 今年 60 岁 ， 相等于 小 明 年龄 的 5 倍 ． 小 明 今年 多少岁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1684", "content": "某 工厂 扩建 厂房 ， 投资 18.8 万元 ， 比 计划 节约 1.2 万元 ． 实际 比 计划 节约 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1193", "content": "学校 买 了 一批 科技 书 和 文艺 书 ， 其中 科技 书 有 168 本 ， 占 买来 总数 的 (4/9) ． 买来 文艺 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18718", "content": "5 年 二 班 有 学生 50 人 ， 其中 有 女生 26 人 ， 男生 占 全班 总 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9180", "content": "菜市场 运 来 25 筐 黄瓜 和 32 筐 茄子 ， 共 重 1870 千克 ． 每 筐 黄瓜 重 30 千克 ， 每 筐 茄子 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12172", "content": "长方体 游泳池 ， 长 50 米 ， 宽 25 米 ， 深 3 米 ， 向 池 中 放水 一段时间 后 ， 小 华 一 看 ， 水面 离 池沿 还有 0.5 米 ， 这时 ， 再 放 多少 立方米 水 才 能够 放满 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18532", "content": "算式 (46/75) / （ (5/12) + (11/15) ） - (12/55) 的 值 为 多少 ．        ", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12901", "content": "一 盒 彩色 粉笔 ， 红 粉笔 占 这 盒 粉笔 的 (9/20) ， 蓝 粉笔 占 这 盒 粉笔 的 (7/20) ． 红 粉笔 和 蓝 粉笔 共 占 这 盒 粉笔 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2396", "content": "解放军 徒步 进入 四川 灾区 救灾 ， 共 行 35 千米 ． 前 2.5 小时 在 平 路上 行走 ， 平均 每 小时 行 7 千米 ； 后来 在 山地 行走 ， 平均 每 小时 行 5 千米 ． 在 山地 行走 了 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19062", "content": "买 一辆 汽车 ， 分期付款 购买 要 加价 7% ， 如果 改用 现金 购买 则 可 享受 “ 0.95 ” 优惠 ， 王 叔叔 算了 一下 ， 发现 分期付款 要 比 现金 购买 要 多付 7200 元 ， 你 知道 这辆 车 原价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7788", "content": "一 商家 进 了 一批 商品 ， 进价 为 每件 800 元 ， 如果 要 使 销售 利润 不 低于 15% ， 则 售价 应 不 低于 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15972", "content": "钟 的 单价 是 18 元 ， 台灯 的 单价 是 25 元 ， 小 华 付出 50 元 ， 买 了 一个 钟 和 一盏 台灯 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19", "content": "小 芳 家 5 月份 用水量 是 16.5 吨 ， 每吨 水 的 价格 是 2.1 元 ， 小 芳 家 一共 有 5 口 人 ， 平均 每人 应交 多少 水费 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18568", "content": "一 根 木料 长 (1/2) 米 ， 第一次 截去 它 的 (1/4) ， 第 二 次 截去 (1/5) 米 ， 这根 木料 减少 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19061", "content": "生产 一批 零件 ， 已经 生产 了 25 天 ， 每天 生产 144 个 ， 还 剩下 2580 个 没有 生产 ． 问 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "528", "content": "黄河 号 货轮 从 甲 港 开往 乙 港 ， 已经 航行 了 85 千米 ， 正好 航行 了 两 港 航道 的 (5/7) 这 只 货轮 离 乙 港 还有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13302", "content": "公民 的 工资收入 超过 1600 元 的 部分 应 按 5% 缴纳 个人所得税 ， 李 阿姨 每个 月 的 工资 是 1980 元 ， 李 阿姨 每月 应 向 国家 缴纳 多少 元 个人所得税 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8704", "content": "同学 们 参加 植树 劳动 ， 四年级 共有 96 人 ， 每人 栽 3 棵 树 ， 五年级 有 87 人 ， 每人 栽 4 棵 树 ， 五年级 比 四年级 多 栽树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13246", "content": "果园 里 有 桃树 120 棵 ， 梨树 的 棵 数 是 桃树 的 3 倍 ， 桃树 比 梨树 少 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10130", "content": "一 个 长方形 木板 的 宽 是 (8/10) 米 ， 长 比 宽 多 (2/10) 米 ， 长方形 木板 的 长 和 宽 一共 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20927", "content": "14.28 是 28 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20884", "content": "有 两列 火车 ， 一列 长 144 米 ， 每秒 行 20 米 ； 一列 长 160 米 ， 每秒 行 18 米 ． 在 两条 不同 的 铁轨 上 相向 而 行 ， 那么 这 两列 从 相遇 到 错开 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20858", "content": "小 明 有 故事书 和 科技 书 共 56 本 ， 其中 科技 书 占 全部 书 的 (3/8) ， 后来 小 明 又 买 回 了 一些 科技 书 ， 这样 科技 书 就 占 全部 书 的 (2/3) ， 小 明 又 买 回 科技 书 几本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17641", "content": "用 一根 长 16 dm 的 铁丝 做 一个 圆形 铁圈 ， 接头处 是 0.3 dm ， 这个 铁圈 的 直径 = 多少 dm ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11406", "content": "被除数 是 244 ， 除数 比 被除数 少 183 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12644", "content": "淘气 和 笑笑 用 一张 红纸 来 布置 教室 ， 其中 (5/8) 笑笑 用来 做 红花 ， 淘气 用 (2/8) 做 小旗 ， 还 剩下 这 张 纸 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14188", "content": "宝 商 超市 运 来 马铃薯 和 葱头 各 200 袋 ， 每 袋 马铃薯 重 35 千克 ， 每 袋 葱头 重 25 千克 ． 这些 马铃薯 和 葱头 共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1564", "content": "果园 里 有 952 棵 苹果树 ， 是 梨树 的 17 倍 ． 苹果树 和 梨树 共有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10220", "content": "某 工厂 要 生产 一批 洗衣机 ， 计划 每天 生产 40 台 ， 25 天 完成 任务 ． 实际 只用 了 20 天 就 完成 了 任务 ， 实际 每天 生产 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2618", "content": "甲班 和 乙班 共 83 人 ， 乙班 和 丙 班 共 86 人 ， 丙 班 和 丁 班 共 88 人 ， 问 甲班 和 丁 班 共 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1712", "content": "甲 、 乙 两袋 糖 的 重量 比 是 4 ： 1 ， 从 甲 袋中 取出 10 千克 糖 放入 乙 袋 ， 这时 两袋 糖 的 重量 比 为 7 ： 5 ， 求 两袋 糖 的 重量 之 和 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14365", "content": "小 亮 家 买来 5 袋 大米 ， 每 袋 重 9 千克 ， 又 买来 32 千克 面粉 ． 面粉 比 大米 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7822", "content": "磁悬浮列车 的 速度 可 达 500 千米 / 时 ， 比 普通 列车 快 (7/3) ， 普通 列车 的 速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1500", "content": "一 张 桌子 150 元 ， 比 一个 凳子 多 60 元 ， 一个 凳子 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4403", "content": "白兔 只 数 的 (5/12) 等于 黑 兔 的 只 数 ， 白兔 有 144 只 ， 黑 兔 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5833", "content": "一 列 火车 从 甲地 开往 乙地 ， 已经 行 了 (3/5) ， 离 乙地 还有 450 千米 ， 甲乙 两地 之间 的 路程 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19080", "content": "学校 原有 粉笔 25 盒 ， 又 买来 43 盒 ， 正好 是 彩色 粉笔 的 4 倍 ， 学校 有 彩色 粉笔 多少 盒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3814", "content": "花圃 里 种 了 13 排 菊花 ， 每排 12 株 ； 种 了 8 排 月季 ， 每排 24 株 ． 月季 比 菊花 多 多少 株 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1308", "content": "一 台 电视机 原价 2350 元 ， 现价 比 原价 降低 了 (3/50) ， 现价 比 原价 降低 了 多少 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14653", "content": "一 本书 小 明 第一天 看 了 全书 的 (2/15) ， 第 二 天 看 了 全书 的 (1/12) ， 还 剩 全书 的 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18060", "content": "王老师 从 北京站 乘火车 去 广州 ， 10 时 后 火车 行驶 了 全程 的 (5/11) ， 从 北京 到 广州 需要 多长时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12084", "content": "商店 运 来 8 箱 小楷 本 ， 每箱 150 本 ． 小楷 本 占 作业本 总数 的 (2/7) ， 一共 运 来 多少 本 作业本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2677", "content": "一 种 玩具 飞机 ， 现在 每 架 的 成本 是 6.8 元 ， 比 原来 降低 了 (3/20) ， 这种 玩具 飞机 原来 每 架 的 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2301", "content": "修 一条 7.2 千米 长 的 路 ， 原 计划 每天 修 0.24 千米 ， 实际 每天 修 的 是 原 计划 的 1.25 倍 ． 实际 几天 修 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12329", "content": "果 圆 里 有 梨树 120 棵 ， 桃树 比 梨树 多 (1/6) ． 果园 里 有 桃树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1600", "content": "篮球场 长 28 米 ， 宽 16 米 ， 每隔 2 米 摆 一 盆花 （ 4 个 角 都 要 摆 ） ． 一共 要 摆 多少 盆花 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10064", "content": "一 个数 扩大 14 倍 是 33.6 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16341", "content": "爷爷 今年 84 岁 ， 是 小 明 的 7 倍 ． 小 明 和 爷爷 相差 几岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1873", "content": "陈老师 月薪 5000 元 ， 按规定 减去 3500 元 后 ， 按 10% 税率 缴纳 个人 税 ， 陈老师 每月 缴纳 个人所得税 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10003", "content": "有 两堆 煤 ， 第一 堆 25.5 吨 ， 第 二 堆 比 第一 堆 的 2 倍 少 1.5 吨 ． 这 两堆 煤 一共 重 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16296", "content": "一 台 电视机 原价 2100 元 ， 节假日 按 0.85 出售 ， 每 台 可 优惠 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16987", "content": "一 根 绳子 ， 剪 去 (1/3) 后 又 接上 3 米 ， 这时 与 原来 的 同样 长 ， 这根 绳子 原来 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6277", "content": "张 大爷 养 了 300 只 鹅 ， 鹅 的 只 数 比 鸭 的 只 数 少 (2/5) ． 养 了 多少 只 鸭 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10331", "content": "某 农具厂 生产 一批 家具 ， 计划 每天 生产 75 台 ， 20 天 完成 ， 实际 提前 5 天 完成 ． 实际 每天 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2655", "content": "食堂 运 来 400 千克 面粉 ， 第一周 吃 了 总数 的 (3/10) ， 第 二 周 吃 了 总数 的 (3/8) ， 还 剩下 多少 千克 面粉 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16190", "content": "熊猫 妈妈 重 118 千克 ， 它 有 5 只 熊宝宝 平均 一只 体重 是 26 千克 ． 熊 妈妈 和 熊宝宝 一共 有 多重 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4308", "content": "阳光 小学 三年级 的 同学 乘 4 辆 汽车 去 春游 ， 前 3 辆车 各 坐 45 个 同学 ， 第 4 辆车 坐 64 人 ， 这次 春游 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3056", "content": "甲乙 两辆 汽车 同时 从 两地 相向 开出 ． 3 小时 后 两车 相遇 ． 两地 相距 174 千米 ． 甲 车 每 小时 行 30 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13159", "content": "花店 运 来 126 朵 玫瑰花 ， 每 6 朵 扎 一束 ， 可以 扎成 多少 束 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16770", "content": "一 棵 树 所 占地 的 长 是 1.58 米 ， 宽 是 1.25 米 的 长方形 ， 这 棵 树 的 占地面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20715", "content": "一 项 工程 ， 4 天 完成 全部 工程 的 (1/5) ， 照 这样 计算 ， 完成 余下 的 工程 需要 多少 天 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17763", "content": "小 丽 看 一 本书 ， 3 天 看 了 45 页 ， 照 这样 计算 ， 又 看 了 4 天 看 完 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22570", "content": "果园 里 种 了 420 棵 桃树 ， 分成 了 7 行 ， 平均 每行 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10119", "content": "某 服装厂 去年 加工 服装 的 收入 总额 是 1500 万元 ． 按照 国家 的 税率 规定 ， 要 缴纳 17% 的 增值税 ． 这个 服装厂 去年 一共 要 缴纳 多少 万元 的 增值税 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "984", "content": "农场 葡萄园 的 公顷 数 是 苹果园 面积 的 (4/5) ， 葡萄园 的 面积 比 苹果园 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11926", "content": "在 校门口 摆 一排 菊花 ， 一共 12 盆 ， 再 在 每 2 盆 菊花 中间 摆 3 盆 月季花 ， 一共 摆 了 多少 盆 月季花 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6982", "content": "超市 运 来 98 盒 节能灯 管 ， 每盒 有 6 支 ， 每支 灯管 卖 7 元 ， 这些 灯管 一共 能 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19630", "content": "已知 某 数 与 24 的 最大 公因数 为 6 ， 最小 公倍数 为 72 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21135", "content": "修建 一所 学校 ， 计划 拨款 300 万元 ， 实际 只用 去 270 万元 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6059", "content": "妈妈 买 了 一袋 30 千克 的 大米 ． 己 经 吃 了 40% ， 还 剩 多少 千克 大米 没有 吃 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7306", "content": "5 名 同学 共运 砖 600 块 ， 照 这样 计算 要 运 1800 块 需 几名 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21457", "content": "一 台 电磁炉 0.9 后 是 450 元 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "116", "content": "某 农具厂 加工 一批 零件 和 ， 原 计划 每天 加工 360 个 ， 18 天 完成 ， 实际 每天 多 加工 72 个 ， 照 这样 计算 ， 提前 几天 就 能 完成 生产 任务 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12667", "content": "两个 工程队 合 开 一条 隧道 ， 入 各 从 一端 同时 向 中间 开凿 ． 第一队 每月 开凿 42 米 ， 第 二 队 每月 开凿 45 米 ， 经过 8 个 月 正好 凿 通 ． 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15526", "content": "小 明 吧 1800 元 钱 存入 银行 ， 定期 3 年 ． 如果 按 年利率 3.6% 计算 ， 利息税 是 5% ． 到期 后 小 明 可 得 利息 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "2046", "content": "甲乙 两辆车 同时 从 相距 360 千米 的 两站 相对 开出 ， 甲 车 每 小时 行 50 千米 ， 比 乙 车 速度 快 25% ． 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14153", "content": "一 段 绳子 长 5 米 ， 剪 去 (3/4) 米 ， 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16771", "content": "甲 、 乙 二 人 从 相距 42 千米 的 两地 同时 相对 出发 ， 甲 的 速度 为 每 小时 8 千米 ， 乙 的 速度 为 每 小时 6 千米 ， 他们 出发 后 多少 小时 相遇 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2582", "content": "超市 购进 了 一批 矿泉水 ， 已经 卖出 (3/5) ， 还 剩 120 箱 ， 超市 购进 了 多少 箱 矿泉水 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8365", "content": "王 叔叔 从 甲地 开车 到 乙地 办事 ， 每 小时 行 45 千米 ， 2 小时 行 了 全程 的 一半 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9311", "content": "一 共有 900 本书 ， 六年级 分 得 (2/9) ， 分给 五年级 的 本 数 相当于 六年级 的 (4/5) ． 五年级 分 得 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6995", "content": "幼儿园 买来 一些 糖果 分给 大 、 中 、 小班 ． 大 班 拿 了 40% ， 中 班 拿 了 (3/8) 还 多 26 颗 ， 小班 拿 了 剩下 的 64 颗 ． 幼儿园 一共 买来 多少 颗 糖果 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4523", "content": "一 个 12 岁 的 儿童 每天 需要 50 毫克 的 维生素 c ， 已知 某 果汁 每 25 克 含 维生素 c 10 毫克 ， 需要 喝 这种 果汁 多少 克 才能 满足 一天 所 需 的 维生素 c ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "445", "content": "往 一个 容积 为 600 立方米 的 蓄水池 注水 ． 4 小时 可以 注满 这个 水池 的 (2/5) ， 如果 要 把 这个 水池 全部 注满 水 ， 一共 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5026", "content": "3 （ 1 ） 班 有 36 名 男生 ， 有 20 名 男生 爱 打篮球 ， 有 26 名 男生 爱 踢足球 ， 没有 不 爱 打球 的 人 ． 一共 有 几名 男生 既 爱 打篮球 又 爱 踢足球 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "274", "content": "30 的 (1/6) 倍 与 82 的 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22450", "content": "长 超 小学 502 班 有 男生 28 人 ， 女生 人数 比 男生 人数 多 (1/14) ． 女生 比 男生 多 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1225", "content": "有 一个 修路 队 ， 要 修 一段路 ， 每天 修 180 米 ， 预计 40 天 可以 完成 ． 现在 要 提前 15 天 修好 ， 每天 应该 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22040", "content": "书架上 有 10 本 故事书 ， 3 本 历史 书 ， 12 本 科普读物 ， 小 王 任意 从 书架上 取 一 本书 ， 有 多少 种 不同 的 取法 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19678", "content": "一 桶 油 连 桶 重 16 千克 ， 用 去 一半 后 ， 连 桶 重 9 千克 ， 桶 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12320", "content": "希望 小学 的 同学 们 修理 桌椅 花 了 40.25 元 ， 比 装订 图书 多 花 了 3.7 元 ． 装订 图书 花 了 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7689", "content": "学校 花 980 元 买 了 5 张 桌子 ， 花 640 元 买 8 把 凳子 ． 一张 凳子 比 一张 桌子 少 用 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18512", "content": "小 明 希望 身高 再 长 高 (1/5) ， 达到 180 厘米 ， 小 明 现在 身高 多少 厘米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11681", "content": "把 一根 长 (8/9) 米 的 钢丝锯 成 每 段长 (2/9) 米 的 若干段 ， 一共 需要 锯 几次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8139", "content": "有 14 个 △ ， 如果 要 给 相邻 的 4 个 涂 上 颜色 ， 一共 有 多少 种 不同 的 涂 法 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13047", "content": "有 两列 火车 ， 快 车长 255 米 ， 每秒 行 42 米 ， 慢 车长 195 米 ， 每秒 行 27 米 ， 如同 向 而 行 ， 快车 追 上 慢车 并 超 错 而 过 ， 需 多少 秒 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16592", "content": "某 厂 要 生产 一批 零件 ， 前 7 天 生产 了 210 箱 ， 照 这样 计算 ， 剩下 的 刚好 5 天 完成 ． 这 批 零件 共有 多少 箱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20499", "content": "童装店 有 某 款 童装 共 120 套 ， 上午 卖出 了 全部 的 10% ， 下午 卖出 了 全部 的 (3/20) ． 这天 一共 卖出 多少 套 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17509", "content": "买 一把 椅子 和 一张 桌子 共 198 元 ， 一张 桌子 的 价钱 是 一把 椅子 的 3 倍 ， 一把 椅子 的 价钱 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22503", "content": "服装店 卖出 18 箱 衬衫 ， 每箱 20 件 ， 每件 98 元 ， 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6564", "content": "一 根 6 米 长 的 绳子 ． 第一次 截去 全长 的 (3/4) ， 第 二 次 截去 (3/5) 米 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13900", "content": "爸爸 将 1000 元 存入 银行 ， 定期 一年 ， 年利率 是 2.25% ， 到期 后 ， 他 应得 的 利息 多少 元 （ 免征 利息税 ） ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9441", "content": "一 条 隧道 长 360 米 ， 有 一列 火车 以 每秒 25 米 的 速度 经过 这 条 隧道 ， 从 车头 进 隧道 到 车尾 离开 隧道 共用 20 秒 ． 这 列 火车 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5640", "content": "纸盒 内 有 形状 完全相同 的 6 个 红球 、 8 个 白 球 和 1 个 黄 球 ， 任意 摸 一个 ， 摸 到 黄 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19982", "content": "东西 两城 相距 405 千米 ． 一列 货车 以 每 小时 55 千米 的 速度 从 西城 开往 东城 ， 开出 3 小时 后 ， 一列 客车 以 每 小时 65 千米 的 速度 从 东城 开往 西城 ． 客车 开出 后 几小时 和 火车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1033", "content": "一 次 排球 锦标赛 ， 有 32 个 队 参加 ， 每队 有 12 名 运动员 ． 一共 有 多少 名 运动员 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22876", "content": "红星 小学 做 广播体操 刚好 站 成方 队 ， 每排 38 名 同学 ， 有 9 排 ， 红星 小学 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21888", "content": "某校 有 男生 420 人 ， 比 女生 少 20% ， 这个 学校 共有 学生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21669", "content": "一 本 《 虹 猫 蓝 兔 》 售价 10 元 ， 一本 《 西游记 》 的 售价 比 《 虹 猫 蓝 兔 》 贵 90% ， 正好 相当于 一套 《 安徒生 童话 》 的 9.5% ， 一套 《 安徒生 童话 》 的 售价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19482", "content": "(4/9) + (3/9) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22725", "content": "在 一道 除法 算式 中 ， 如果 除数 是 8 ， 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13952", "content": "学校 要 组建 一个 合唱队 参加 “ 我 的 梦 ， 中国 梦 ” 歌唱 比赛 ， 其中 有 男生 25 人 ， 女生 35 人 ， 男生 人数 占 合唱队 总 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14836", "content": "一 个 车间 女职工 人数 比 男 职工 人数 少 30 人 ， 男女 职工 人数 之 比 是 5 ： 3 ， 女职工 有 多少 人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16444", "content": "姐姐 和 妹妹 去 超市 ， 姐姐 给 妹妹 20 元 钱 后 ， 两 人 的 钱 数 相等 ． 那么 ， 姐姐 原来 比 妹妹 多 了 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "315", "content": "450 千克 化肥 ， 装 了 26 袋 后 ， 还 剩 8 千克 ． 平均 每 袋装 了 几千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12872", "content": "全国 “ 啦 啦 操 ” 启动 仪式 在 8 川 中学 隆重举行 ， 初一 二年级 小班 学生 均 参加 ． 其中 初一 年级 小班 有 男生 80 人 ， 女生 人数 相当于 男生 的 (7/8) ； 初二 年级 小班 参加 的 人数 是 初一 年级 女生 的 2 倍 少 20 人 ， 初二 年级 小班 有 多少 人 参加 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4894", "content": "一 天 乔 巴 开船 出游 ， 逆流而上 ， 船 在 静 水中 的 速度 为 每 小时 15 千米 ， 水流 速度 为 每 小时 3 千米 ． 船 开出 5 小时 后 发动机 突然 坏 了 ． 船 失去 了 动力 ， 顺流 漂回 ． 那么 再 过 多少 小时 可怜 的 乔 巴 又 回到 了 出发地 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5717", "content": "40 * 1.4 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13385", "content": "一 块 地 ， 其中 (1/4) 种 玉米 ， (2/5) 种 高粱 ， 剩下 的 种 小麦 ， 小麦 地 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1629", "content": "小胖 带 了 些 钱 到 超市 购物 ， 他 买 了 48.2 元 的 零食 和 18.43 元 的 文具 ， 还 找回 了 13.37 元 ， 请问 ： 小胖 一共 带 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10275", "content": "比 19 小 8 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19773", "content": "小 晶 今年 11 岁 ， 妈妈 的 年龄 比 她 的 3 倍 还 多 2 岁 ． 妈妈 今年 几岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10644", "content": "96 人 排成 3 个 方队 做操 ， 每个 方队 站 成 4 列 ， 平均 每 列 站 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21416", "content": "某 食堂 计划 烧煤 2400 千克 ， 实际 比 计划 节约 (1/5) ， 实际 烧煤 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17054", "content": "一 本 故事书 27.8 元 ， 比 一本 科技 书 贵 3.5 元 ． 买 一本 故事书 和 一本 科技 书 一共 需要 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5163", "content": "30 名 学生 报名 参加 美术 小组 ． 其中 有 26 人 参加 了 美术组 ， 17 人 参加 了 书法 组 ． 问 两个 组 都 参加 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3608", "content": "两队 合 修 一条 路 ， 第一队 修 了 全长 的 50% ， 第 二 队 修 了 420 千米 ， 这时 两队 修 的 比 全长 的 (2/3) 少 380 千米 ， 这 条 路 全长 多少 千米 ？                   ", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20220", "content": "工程队 计划 用 21 天 修 一条 长 18.9 千米 的 公路 ， 结果 只用 了 18 天 修 完 ， 结果 比 计划 每天 多 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17868", "content": "修筑 一条 公路 ， 6 天 修筑 了 这 条 公路 的 (2/5) ． 照 这样 计算 ， 修 完 这 条 公路 要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6098", "content": "一 块 菜地 的 (1/5) 种 西红柿 ， 它 的 (1/3) 种 黄瓜 ， 西红柿 和 黄瓜 一共 占 这块 地 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17438", "content": "王师傅 要 完成 360 个 机器 零件 的 加工 任务 ， 原 计划 每 小时 加工 60 个 ， 实际 每 小时 多 加工 30 个 ， 这样 王师傅 可以 比 原 计划 提前 几小时 完成 任务 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10084", "content": "一 段 木料 ， 每 3 米 锯 段 ， 一共 锯 了 8 次 ， 这 段 木料 长 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19106", "content": "一 个 玩具厂 做 一个 毛绒 兔 原来 需要 3.8 元 的 材料 ． 后来 改进 了 制作方法 ， 每个 只 需 3.6 元 的 材料 ． 原来 准备 做 216 个 毛绒 兔 的 材料 ， 现在 可以 多 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "579", "content": "计算 89 - 88 + 87 - 86 + … + 5 - 4 + 3 - 2 + 1 的 结果 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4605", "content": "一 个 除法 算式 中 ， 除数 是 6 ， 商 是 35 ， 余数 是 4 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19411", "content": "育才 小学 有 男生 500 人 ， 女生 人数 比 男生 少 (1/5) ， 育才 小学 有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16421", "content": "一 个 圆形 水池 ， 直径 400 米 ， 沿 池边 隔 4 米 栽 一棵树 ， 一共 能 栽 多少 棵 树 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20379", "content": "一 个 班 有 48 人 ， 其中 男生 占 (5/8) ， 男生 中 的 (5/6) 去 打扫卫生 ， 打扫卫生 的 男生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1878", "content": "特警队 要 去 50.31 千米 的 地方 执行 任务 ， 开始 以 每 小时 7.2 千米 的 速度 行 了 3.5 小时 ． 剩下 的 路程 必须 在 2.7 小时 内行 完 ． 剩下 的 路程 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15348", "content": "科学 小组 做 种子 发芽 实验 ， 第一次 实验 用 了 300 粒 种子 做 实验 ， 有 12 粒 未 发芽 ． 第 二 次 用 200 粒 做 实验 ， 有 8 粒 未 发芽 ， 这 批 种子 的 发芽率 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6436", "content": "在 一个 圆形 水池 的 4 周 种树 ， 每隔 3 米 种 一棵 ， 一共 种 了 20 棵 ， 这个 水池 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16285", "content": "一 个 电视机厂 要 生产 904 台 电视机 ， 第一个 星期 生产 了 352 台 ， 第 二 个 星期 生产 了 448 台 ， 还要 生产 多少 台 电视机 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11691", "content": "一 个 滴水 的 水龙头 一天 要 浪费 17 千克 水 ， 一个 漏水 的 马桶 一天 要 浪费 96 千克 水 ． 照 这样 计算 ， 一个 滴水 的 水龙头 和 一个 漏水 的 马桶 一年 要 浪费 多少 千克 水 ？ （ 一年 按 365 天 计算 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "324", "content": "园林 工人 在 一条 公路 旁 栽 树木 ． 栽 松树 12 棵 ， 栽 的 柳树 是 松树 的 3 倍 ， 栽 的 梧桐树 是 柳树 的 2 倍 ． 栽 的 梧桐树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10756", "content": "6 一班 有 学生 56 人 ， 男女生 人数 比 是 4 ： 3 ， 男生 有 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5684", "content": "一 块 长方形 花圃 ， 它 的 (1/9) 种 月季 ， (2/9) 种 菊花 ， 其余 的 种 玫瑰 ． 种 玫瑰 的 面积 占 这块 花圃 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4190", "content": "妈妈 9 小时 做 27 个 零件 ， 再 做 3 小时 全部 做 完 ， 妈妈 一共 要 做 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20280", "content": "某 水果店 要 运进 一批 水果 360 千克 ， 第一天 运 来 总数 的 25% ， 第 二 天运 来 总数 的 40% ， 两天 一共 运 来 多少 千克 水果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6606", "content": "第一层 书架上 有 51 本书 ， 第 二 层 书架上 的 书 是 第一层 书架 的 3 倍 ， 两层 书架上 的 书 相差 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19658", "content": "服装厂 要 加工 一批 儿童服装 ， 如果 每套 用布 1.5 米 ， 可以 加工 480 套 ． 如果 每套 用布 1.2 米 ， 可以 加工 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22227", "content": "有 两堆 煤 ， 第一 堆 重 (14/5) 吨 ， 第 二 堆 是 第一 堆 的 (10/7) ． 两堆 煤 一共 重 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5550", "content": "计算 ： 59 + 599 + 5999 + 59999 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21942", "content": "学校 买来 足球 和 排球 各 5 个 ， 一个 足球 115 元 ， 一个 排球 72 元 ． 买 足球 比 排球 多用 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9831", "content": "2008 年 ， 李 叔叔 的 一笔 存款 到期 后 ， 共有 利息 1680 元 ， 当时 银行 的 存款 利息 需 缴 5% 的 利息税 ． 他 需 缴 多少 元 利息税 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18962", "content": "三年级 3 个 班 有 120 人 参加 了 文艺 小组 ， 如果 每个 班 有 2 个 文艺 小组 ， 平均 每个 文艺 小组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17212", "content": "有 8 千克 水 ， 用 去 (1/2) 千克 ， 还 剩下 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "147", "content": "依法 纳税 是 每个 公民 的 义务 ． 张老师 上个月 的 工资总额 是 1900 元 ， 按照 个人所得税法 的 有关 规定 ， 超过 1600 元 的 部分 要 缴纳 5% 的 个人所得税 ， 那么 张老师 上个月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6004", "content": "一 个数 比 325 的 3% 大 0.25 ， 求 这个 数 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18696", "content": "一 个 圆柱 ， 底面 周长 是 23 厘米 ， 高 6 厘米 ， 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6080", "content": "一 辆 汽车 (1/2) 小时 行 了 30 千米 ， 平均 每 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8041", "content": "(5/7) * (3/8) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14950", "content": "一 辆 自行车 轮胎 的 外 直径 为 0.7 米 ， 车轮 平均 每 分 转 100 周 ． 小 红 家 离 学校 约 2198 米 ， 那么 她 从 家 骑车 上学 要 多少 分 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8813", "content": "一 根 绳子 长 48 m ， 用 去 它 的 (3/4) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3117", "content": "王 飞 的 父亲 每月 收入 1050 元 ， 母亲 每月 收入 800 元 ， 全家 每月 储蓄 钱 数 是 支出 钱 数 的 (1/4) ， 王 飞 家 每月 储蓄 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3881", "content": "某班 有 50 名 学生 ， 参加 语文 竞赛 的 有 29 人 ， 参加 数学 竞赛 的 有 26 人 ， 已知 语 、 数 竞赛 参加 的 有 10 人 ， 那么 语 、 数 竞赛 都 没有 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11643", "content": "师徒 二 人 共同 加工 一批 零件 ． 师傅 做 了 640 个 ， 比 徒弟 做 的 1.5 倍 多 40 个 ， 师徒 一共 加工 了 多少 个 零件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22958", "content": "水 是 由 氢 和 氧 按 1 ： 8 的 重量 比 化合 而 成 的 ， 72 千克 水中 ， 含氧 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9376", "content": "从 a 地 到 b 地 有 2 条 路 可 走 ， 从 b 地 到 c 地 有 4 条 路 可 走 ， 那么 从 a 地 经 b 地 到 c 地 共有 多少 条 路 可 走 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10991", "content": "五年级 参加 夏令营 活动 无论是 7 人 编成 一组 还是 8 人 编成 一组 都 正好 无 剩余 ， 参加 夏令营 至少 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14953", "content": "在 计算 48 / 3 * 13 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 结果 得 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13279", "content": "修路 队 修 一段路 ， 第一周 修 了 5 天 ， 平均 每天 修 105 米 ， 第 二 周 准备 修 6 天 完工 ， 平均 每天 修 150 米 ． 这 条 路 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7845", "content": "甲 车 和 乙 车 同时 从 两地 相对 开出 ， 6 小时 后 相遇 ， 甲 车 每 小时 行 90 千米 ， 乙 车 的 速度 是 甲 车 的 1.08 倍 ， 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22947", "content": "一 块 三角形 菜地 ， 边长 的 比 是 4 ： 3 ： 5 ， 周长 是 168 米 ， 其中 最长 的 边长 = 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16124", "content": "多彩 服装厂 10 月 计划 制作 服装 3000 套 ， 上旬 完成 计划 的 45% ， 中旬 完成 计划 的 40% ， 再生产 多少 套 才能 完成 计划 的 任务 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19939", "content": "一 根 绳子 长 175 米 ， 第一次 用 去 38 米 ， 第 二 次 用 去 62 米 ， 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19953", "content": "一 列 火车 通过 1200 米 的 大桥 共用 了 30 秒钟 ， 已知 火车 的 速度 为 50 米 / 秒 ， 这 列 火车 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8633", "content": "某 工厂 上 月 计划 用水 400 吨 ， 实际 节约 了 17.5% ， 实际 用水 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12787", "content": "把 一堆 糖果 分给 几位 小朋友 ， 若 每人 2 块 ， 将 剩余 12 块 ； 每人 3 块 ， 将 缺少 5 块 ， 那么 小朋友 共 多少 位 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "39", "content": "一 种 药水 由 药 和 水 按 1 ： 20 配制 而 成 ， 要 配制 这种 药水 84 千克 需要 药 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16712", "content": "一 批 毛巾 的 合格率 是 98% ， 200 件产品 中 有 多少 件 不 合格 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18393", "content": "甲乙 两个 工程队 共同 安装 一条 煤气管道 ， 甲队 每天 安装 62.5 米 ， 乙 队 每天 安装 77.2 米 ， 计划 20 天 完成 任务 ， 这 条 煤气管道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9653", "content": "54.6 - 31.4 的 差 ， 加上 0.6 / 0.96 的 商 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16825", "content": "果 商站 最近 来 了 若干 箱 水果 ， 第一天 卖出 总数 的 (1/3) 还 多 2 箱 ， 第 二 天 卖出 的 比 剩下 的 (1/2) 还 少 1 箱 ， 这时 还 剩余 38 箱 没 卖 ． 问 这 批 水果 一共 有 多少 箱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "16397", "content": "一 块冰 化成 水 后 体积 减少 (1/11) ， 那么 这些 水 再 凝结 成 冰 后 ， 体积 增加 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22546", "content": "一 根 木头 锯 成 10 段 ， 每 锯 一次 要 2 分钟 ， 一共 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12810", "content": "甲 、 乙 两地 相距 1000 米 ， 小 华 从 甲地 、 小 明 从 乙地 同时 相向 而 行 ， 小 华 每分钟 走 80 米 ， 小 明 每分钟 走 45 米 ． 两 人 几分 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1913", "content": "单人 课桌 高 (8/10) 米 ， 高 比 长 多 (2/10) 米 ， 课桌 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20557", "content": "水果店 有 梨子 360 kg ， 卖出 它 的 (1/4) 后 ， 剩余 的 梨 的 质量 是 苹果 质量 的 60% ， 苹果 有 多少 kg ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16028", "content": "14 枝 铅笔 的 价钱 是 4.2 元 ， 10 枝 铅笔 的 钱 可以 买 3 枝 圆珠笔 ． 圆珠笔 多少 钱 一支 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11588", "content": "6 一班 参加 合唱队 的 有 24 人 ， 参加 美术 培训 的 人数 是 合唱队 的 (1/4) ， 参加 舞蹈队 的 人数 是 美术 培训 的 (2/3) ， 参加 舞蹈队 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14742", "content": "多少 的 (7/2) 倍 是 2 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17209", "content": "52 + 53 + 54 + 55 + 56 + 57 + 58 = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "1696", "content": "一 桶 油 第一次 用 去 (1/3) 正好 是 4 升 ， 第 二 次 用 去 这 桶 油 的 (1/4) ， 还 剩 多少 升 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9901", "content": "一 个 平行四边形 和 一个 长方形 的 面积 相等 ， 已知 长方形 的 长 是 18 厘米 ， 宽 是 10 厘米 ， 平行四边形 的 底 是 15 厘米 ， 那么 它 的 高 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19012", "content": "学校 有 小说 156 本 ， 科技 书 比 小说 多 78 本 ， 儿童 故事书 是 小说 和 科技 书 总 本 数 的 3 倍 ， 学校 有 多少 本 儿童 故事书 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9137", "content": "把 一根 长 20 厘米 ， 宽 5 厘米 ， 高 3 厘米 的 长方体 木料 沿 横截面 锯 成 2 段 ， 表面积 增加 多少 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21319", "content": "一 头 大象 重 5.1 吨 ， 一头 黄牛 重 0.34 吨 ， 这 头 大象 的 体重 是 黄牛 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19664", "content": "一 台 彩电 ， 原价 1800 元 ， 现在 的 价钱 比 原来 降低 了 (1/6) ， 现在 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8149", "content": "某 图书馆 购进 一批 图书 ， 其中 科技 书 占 20% ， 文艺 书 有 480 本 ， 余下 的 240 本 是 故事书 ， 这 批 书 共有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18554", "content": "粮店 运进 大米 12 吨 ， 比 面粉 多 (1/3) ， 运进 面粉 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15176", "content": "商店 有 一种 衣服 ， 售价 34 元 ， 比 原来 便宜 15% ， 这种 衣服 原来 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8442", "content": "小 美 收藏 有 风景 邮票 42 张 ， 风景 邮票 的 张 数 比 动物 邮票 的 张 数 的 3 倍 多 6 张 ， 王 红 收藏 两种 邮票 一共 多少 张 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19337", "content": "一 个 乡镇企业 职工 人数 的 (3/4) 等于 一个 个体 工厂 职工 人数 的 (2/3) ． 这个 乡镇企业 有 职工 80 人 ， 个体 工厂 有 职工 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2431", "content": "学校 舞蹈队 有 40 人 ， 其中 五年级 学生 占 (1/4) ， 五年级 学生 比 六年级 学生 多 25% ． 舞蹈队 中 六年级 学生 有 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2397", "content": "工程队 要 铺 一条 煤气管道 ， 第一天 铺 了 (1/10) ， 第 二 天 铺 了 (1/5) ， 第 3 天 铺 了 (3/10) ， 还有 多少 未 铺 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12152", "content": "同学 们 排队 做操 ， 从 前面 数 ， 小 明 排 第 4 ， 从 后面 数 ， 小 明 排 第 5 ， 这 一队 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6812", "content": "校园 里 在 了 180 棵 杜鹃花 ， 每行 9 棵 ． 4 个 小朋友 去 浇花 ， 平均 每人 要 浇 多少 行 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2465", "content": "西安 到 宝鸡 180 千米 ， 甲 、 乙 两辆 汽车 同时 从 两地 相对 开出 ， 2 小时 后 相遇 ， 甲 车 每 小时 行 38 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8767", "content": "430 - 201 与 22 的 和 ， 然后 除以 20 的 商 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10527", "content": "一 个 钟 面上 的 时针 长 5 厘米 ， 从 上午 8 时 到 下午 2 时 ， 时针 尖端 走 了 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12506", "content": "张 林 要 练习 打乒乓球 ， 一支 乒乓球拍 7.8 元 ， 一个 乒乓球 1.5 元 ， 张 林带 了 10 元 钱 买 了 一支 球拍 和 一个 乒乓球 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15808", "content": "在 家电 商场 促销 活动 期间 ， 王 阿姨 花 了 450 元 买 了 一个 微波炉 ， 比 平时 少 花 50 元 ． 价格便宜 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12080", "content": "红红 过生日 ， 妈妈 买来 一个 蛋糕 ， 切 了 (1/4) 给 红红 ， 她 只 吃 了 其中 的 (2/5) ． 她 吃掉 的 部分 相当于 整个 蛋糕 的 几分 之 几 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10102", "content": "一 列 客车 和 一列 货车 从 相距 1615 千米 的 两地 同时 相对 开出 ， 客车 每 小时 行 96 千米 ， 货车 每 小时 行 74 千米 ， 经过 几小时 两列 火车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19694", "content": "王 叔叔 上午 开车 送 蔬菜 进城 ， 去 时 每 小时 行 60 千米 ， 用 了 3 小时 ， 返回 时 只用 了 2 小时 ． 王 叔叔 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2068", "content": "一 辆 货车 从 甲地 到 乙地 送货 ， 去 时 一 共用 了 5 小时 ， 回来 时 速度 提高 到 每 小时 90 千米 ， 结果 3.5 小时 就 从 原 路 返回 到 甲地 ． 这辆 货车 去 乙地 送货 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5184", "content": "一 个数 除以 6 ， 商 是 9 ， 余数 是 4 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18858", "content": "做 3 个 棱 长 是 5 分 米 的 无盖 正方体 木盒 ， 需 木板 多少 平方分米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "18359", "content": "某 厂 产值 今年 比 去年 增产 (1/10) ， 今年 的 产值 是 去年 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19389", "content": "为 举行 校庆 ， 6 （ 2 ） 班 要 做 180 面 小旗 ， 已经 做 了 (5/6) ， 做 了 多少 面 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5787", "content": "学校 第一次 购买 15 块 磁性 小黑板 ， 每块 26 元 ， 第 二 次 又 买 了 同样 的 小黑板 8 块 ， 一共 应付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20030", "content": "布袋 里 有 外形 完全 一样 的 1 只 红球 、 2 只 黄 球 、 3 只 绿 球 ， 让 你 从中 任意 摸 一只 球 ， 摸 到 黄 球 的 概率 （ 可能性 ） 用 分数 表示 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1835", "content": "学校 6 一 儿童节 演出 开幕式 ， 120 名 学生 组成 了 2 个 花束 队 ， 每个 花束 队 排 4 行 ， 平均 每行 有 几个 学生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1710", "content": "小花 和 小 明 两家 相距 400 米 ， 两 人 同时 从 家中 出发 在 同 一条 路上 同 向 而 行 ， 小花 每分钟 行 60 米 ， 小 明 每分钟 行 70 米 ， 3 分钟 后 两 人 相距 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4414", "content": "小 明 家 有 5 口 人 ， 小 明 妈妈 至少 要 买 几个 苹果 分给 大家 ， 才能 保证 至少 有 一 人 能 得 两个 苹果 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21901", "content": "两辆 汽车 分别 从 a 、 b 两地 同时 出发 ， 相向 而 行 ， 4 时 后 相遇 ． 两辆 汽车 的 速度 分别 是 每 时 64 千米 和 每 时 76 千米 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6458", "content": "植树节 那天 ， 栽 杨树 584 棵 ， 栽 松树 73 棵 ． 栽 的 杨树 是 松树 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10722", "content": "同学 们 做 红花 ， 第一组 做 了 135 朵 ， 第 二 组 做 了 147 朵 ． 每 6 朵 扎成 一束 ， 两组 做 的 花 可以 扎成 多少 束 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5460", "content": "希望 小学 四年级 的 438 名 同学 去 参观 课外 实践 活动 ， 已经 去 了 48 人 ， 剩下 的 每 30 人 乘 一辆车 ， 需要 多少 辆车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9149", "content": "学校 买 回 28 个 篮球 ， 每个 篮球 67 元 ， 一共 花 了 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14738", "content": "一 摩托车 制造厂 计划 一年 生产 摩托车 12500 辆 ， 结果 上半年 生产 了 5500 辆 ， 下半年 生产 了 8000 辆 ， 实际 比 计划 多 生产 了 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23143", "content": "一 本 故事书 共 135 页 ， 第一天 和 第 二 天 共 看 了 全书 的 (2/3) ， 若 第 3 天 接着 看 ， 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15222", "content": "一 件 衣服 ， 第一天 按 原价 出售 ， 没 人 来 买 ， 第 二 天 降价 20% 出售 ， 仍 没 人 来 买 ， 第 3 天 再 降价 24 元 ， 终于 售出 ． 已知 售出 价格 恰好 是 原价 的 56% ， 那么 原价 是 几元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "123", "content": "一 个数 的 (3/5) 比 这个 数 的 20% 多 60 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5785", "content": "用 2400 个 鸡蛋 孵小鸡 ， 结果 有 5% 没有 孵出 小鸡 ． 孵出 小鸡 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21152", "content": "某 山区 要 抢修 一条 公路 ， 原 计划 每 小时 修 300 米 ， 20 小时 完成 ， 现在 要求 12 小时 完成 ， 那么 ， 每 小时 比 原 计划 多 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19036", "content": "10 公顷 小麦 田 ， 平均 每 公顷 收 小麦 7.5 吨 ， 按 85% 的 出粉率 计算 ， 这些 小麦 可 磨 面粉 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5155", "content": "要 种 818 棵 杨树 ， 已经 种 了 218 棵 ． 剩下 的 要 15 天 种 完 ． 平均 每天 要 种 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3977", "content": "一 个 因数 是 508 ， 另 一个 因数 是 5 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9397", "content": "新 隆 粮店 运进 大米 50 袋 ， 运进 面粉 90 袋 ， 大米 和 面粉 各 25 千克 ． 新 隆 店 运进 大米 和 面粉 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5705", "content": "在 “ 创 书香 校园 ” 活动 中 ， 小 “ 书迷 ” 李 萱 新 买 的 小说书 比 故事书 多 12 本 ， 故事书 的 本 数 是 小说书 的 40% ， 李 萱 新 买 的 小说书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13876", "content": "红红 家 离 学校 的 距离 是 0.32 千米 ， 亮 亮 家 离 学校 的 距离 是 红红 家 离 学校 距离 的 5 倍 ． 亮 亮 家 离 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14662", "content": "同学 们 浇 树 ， 每人 浇 3 棵 ， 24 人 正好 浇 完 ． 如果 12 人 浇 树 ， 每人 浇 几棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15913", "content": "一 件 衣服 进价 为 80 元 ， 按 标价 的 0.6 出售 还 赚 52 元 ， 那么 标价 为 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10716", "content": "一 个数 除以 7 的 商 是 29 ， 余数 是 3 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12910", "content": "一 副 羽毛球拍 原来 标价 是 36 元 ， 学校 购买 时 ， 每 副 降价 12 元 ， 现在 买 28 副 羽毛球拍 ， 比 原来 少付 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21470", "content": "已知 甲 数 是 60 ， 乙 数 是 甲 数 的 20% ， 乙 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8665", "content": "比 的 前项 是 0.4 ， 比值 是 (2/5) ， 则 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3527", "content": "7.5 是 2.5 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22800", "content": "李 华 的 妈妈 在 银行存款 5000 元 ， 年利率 上 2.5% ， 利息税 是 5% ， 存款 3 年 ， 到期 后 ， 李 华 的 妈妈 能 取回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "11927", "content": "36 棵 树 平均 种 成 9 行 ， 每行 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10015", "content": "永兴 房地产 公司 去年 造 新房 6 幢 ， 每 幢 8 套 ， 今年 计划 造 56 套 ， 两年 共 造 新房 多少 套 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8919", "content": "小 刚 看 一本 180 页 的 科技 书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 60% ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2390", "content": "果园 里 卖出 梨子 160 箱 ， 每箱 25 千克 ， 卖出 的 苹果 是 梨子 的 2 倍 ． 果园 里 卖出 苹果 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12225", "content": "李 红 的 体重 是 42 千克 ， 王 艳 的 体重 是 36 千克 ， 林海 的 体重 是 李 红 、 王 艳 体重 总和 的 (1/2) ， 林海 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11388", "content": "6 一班 有 男生 30 人 ， 女生 比 男生 少 (2/5) ， 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15926", "content": "据统计 蓝鲸 3 小时 能 游 108 米 ， 海豚 5 小时 能 游 245 米 ， 蓝鲸 每 小时 比 海豚 少 游 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4645", "content": "(4/9) 与 27 的 积 除以 16 与 4 的 差 ， 商 = ？ （ 列 综合 算式 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20290", "content": "一 根 铜丝 长 10 米 ， 用 去 6 米 ， 还 剩下 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9992", "content": "乘数 是 10 ， 积 比 被乘数 多 180 ， 被乘数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12355", "content": "从 (4/5) 里 减去 (1/3) ， 所得 的 差 与 (1/6) 相加 ， 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19769", "content": "兵 兵 从 家 到 学校 ， 前 3 分钟 走 315 米 ， 照 这样 的 速度 ， 走 到 学校 还要 12 分钟 ， 兵 兵家 离 学校 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20621", "content": "一 艘 轮船 顺流而下 ， 前 3 个 小时 每 小时 行 40 千米 ， 后 4 个 小时 共 行驶 90 千米 ， 这 艘 轮船 平均 每 小时 行使 多少 千米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10619", "content": "东风 乡 修 一条 公路 ， 原 计划 每天 修 0.6 千米 ， 20 天 完成 ． 实际 每天 比 原 计划 多 修 0.15 千米 ． 实际 用 了 多少 天 ？ （ 4 分 ）", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18348", "content": "幸福 小区 电话 普及率 是 80% ， 经 调查 ， 该 小区 有 28 户 未 安装 电话 ， 幸福 小区 共 多少 户 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18842", "content": "一 种 小麦 出粉率 为 85% ， 要 磨 13.6 吨 面粉 ， 需要 这样 的 小麦 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14066", "content": "甲 数 是 乙 数 的 8 倍 ， 丙 数 是 乙 数 的 32 倍 ， 丙 数 是 甲 数 的 多少倍 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18179", "content": "一 箱 桃子 分给 甲 、 乙 、 丙 ， 甲 分 得 了 全部 的 (1/4) + 7 个 ， 乙 分 得 了 全部 的 (1/5) + 5 个 ， 丙 分 得 其余 的 一半 ， 最后 剩下 的 是 全部 的 (1/8) ， 这 箱 桃子 有 几个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14998", "content": "体育课 上 ， 同学 们 进行 跳远 练习 ． 聪聪 跳 了 1.7 米 ， 明明 比 聪聪 少 跳 了 0.3 米 ， 扬扬 比 明明 多 跳 了 0.15 米 ． 扬扬 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1134", "content": "小惠 从 1 楼 到 6 楼 要 走 60 个 台阶 ， 到 12 楼 还要 走 多少 个 台阶 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1836", "content": "甲乙 两队 在 a 村 和 b 村 之间 修 一条 长 1800 米 的 水渠 ， 甲队 每天 修 42 米 ， 乙 队 每天 修 48 米 ． 如果 两队 分别 从 a 、 b 两 村 同时 开工 ， 修 完 这 条 水渠 需要 几天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1410", "content": "参加 学校 合唱队 的 人数 有 60 人 ， 比 参加 舞蹈队 的 多 25% ． 参加 舞蹈队 的 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17804", "content": "王 飞 有 3 件 不同 的 上衣 ， 2 条 不同 的 裤子 ， 他 有 多少 种 不同 的 穿 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15142", "content": "学校 用 708 元 买 了 6 把 椅子 和 3 张 桌子 ， 每 把 椅子 58 元 ， 每张 桌子 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1957", "content": "两个 足球队 进行 比赛 ， 甲队 进球 4 个 ， 乙 队 进球 3 个 ， 则 乙 队 比 甲队 少 进 的 球 数 是 甲队 的 多少 ． （ 填 “ 几分 之 几 ” ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21877", "content": "小 明 的 妈妈 靠 勤劳致富 ． 她 养 了 45 只 公鸡 ， 养 的 母鸡 只 数 比 公鸡 的 3 倍 还 多 8 只 ． 小 明 家养 了 多少 只 母鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5293", "content": "一 台 电冰箱 原价 3200 元 ， 第一次 降价 10% ， 第 二 次 降价 (1/8) ， 现在 买 一台 电冰箱 要 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9218", "content": "一 列 火车 4.5 小时 行驶 495 千米 ， 某人 骑 自行车 3 小时 行驶 了 37.5 千米 ， 这 列 火车 的 速度 是 自行车 速度 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22215", "content": "一 件 上衣 45 元 ， 裤子 比 上衣 便宜 12 元 ． 买 一套 衣服 要 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11730", "content": "化肥厂 计划 用 30 天 生产 化肥 84 吨 ， 实际 每天 比 计划 多 生产 0.2 吨 ， 实际 比 计划 提前 几天 完成 任务 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2679", "content": "小 亚 家 离 学校 1140 米 ， 小 亚 从 家 去 学校 ， 3 分钟 正好 行 了 180 米 ， 照 这样 的 速度 ， 还要 行 几分钟 才能 到达 学校 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5879", "content": "学校 合唱队 有 队员 96 人 ， 是 舞蹈队 人数 的 3 倍 ， 合唱队 和 舞蹈队 共 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2265", "content": "去年 某 小学 买 了 56 台 电脑 ， 花费 了 22.4 万元 ， 今年 该校 又 购买 了 45 台 电脑 ， 花费 了 15.75 万元 ， 今年 购买 的 电脑 每 台 比 去年 便宜 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23023", "content": "教室 前面 的 墙壁 ， 长 6 米 ， 高 3 米 ． 墙上 有 一块 面积 是 3.8 平方米 的 黑板 ． 现在 要 粉刷 这 面墙 ， 要 粉刷 的 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16307", "content": "水果店 运 来 480 千克 水果 ， 第一天 卖出 了 总数 的 (1/4) ， 第 二 天 卖出 的 相当于 第一天 的 (5/6) ． 两天 一共 卖出 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8302", "content": "小 明 做 数学 作业 用 了 (1/2) 小时 ， 做 语文 作业 用 了 (2/5) 小时 ， 做 数学 作业 和 语文 作业 一 共用 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13977", "content": "工程队 修路 ， 第一天 修 了 全长 的 (2/6) ， 第 二 天 修 的 比 第一天 多 修 了 全长 的 (1/6) ， 两天 一共 修 了 这 条 路 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4666", "content": "甲 数 是 43 ， 比 乙 数 的 2 倍 还 多 13 ， 乙 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20439", "content": "在 一道 除法 算式 中 ， 除数 是 8 ， 余数 是 6 ， 商 是 23 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5599", "content": "40 是 一个 数 的 (2/3) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "779", "content": "某 市场 从 外地 运 来 65 箱 鸡蛋 ， 每箱 27 千克 ， 运 来 48 箱 鸭蛋 ， 每箱 25 千克 ． 鸡蛋 比 鸭蛋 多批 来 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21199", "content": "(1/5) ： 多少 = (1/8) ： 5 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21029", "content": "商店 有 2000 箱 牛奶 ， 上午 卖出 总数 的 (1/2) ， 下午 卖出 总数 的 (2/5) ， 还 剩 多少 箱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13822", "content": "某 粮店 上 一周 卖出 面粉 36 吨 ， 比 卖出 的 大米 多 (1/8) ， 粮店 上周 卖出 大米 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22741", "content": "计算 ： 8 * 13 * 125 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22152", "content": "把 一根 长 (9/8) 米 的 彩带 平均 分给 9 个人 做 手链 ， 每个 人 的 手链 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15433", "content": "一 条 水渠 ， 修 了 (3/5) ， 还 剩 240 米 没 修 ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "475", "content": "电视机厂 计划 18 天 内 生产 960 台 电视机 ， 实际 比 计划 提前 2 天 完成 ， 实际 每天 生产 电视机 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2446", "content": "一 种 电视机 现在 售价 2600 元 ， 比 原价 降低 了 (2/15) ， 这种 电视机 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4393", "content": "一 个数 的 (3/7) 是 18 ， 这个 数 的 (1/3) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21862", "content": "被除数 与 除数 都 是 6 ， 商 = ？ 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19421", "content": "甲 、 乙 两列 火车 从 相距 700 米 的 两地 相对 开出 ， 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 75 千米 ， 甲 车 开出 1 小时 后 ， 乙 车 再 开出 ， 乙 车 开出 多少 小时 后 与 甲 车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12011", "content": "一 个数 的 60% 比 它 的 40% 多 2.4 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4642", "content": "张老师 编写 《 辅导 练习 》 ， 获得 稿费 2800 元 ， 按规定 ， 一次 稿费 超过 800 元 的 部分 应 按 14% 的 税率 纳税 ． 张老师 应 缴纳 税款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12617", "content": "超市 运 来 8 箱 鸡蛋 ， 每箱 12 千克 ， 卖出 一些 后 ， 还 剩 42 千克 ． 卖出 了 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18336", "content": "600 里面 减去 6 个 100 ， 差 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9797", "content": "小 明 、 小 华 两 人 相距 6 千米 ， 小 明 在 前 ， 小 华 在 后 ， 两 人 同时 出发 ， 2 小时 后 小 华 追 上 小 明 ， 小 华 每 小时 行 8 千米 ， 小 明 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11663", "content": "4 年 一班 有 60 名 学生 ， 期末考试 语文 成绩优秀 的 有 32 人 ， 数学 成绩优秀 的 有 27 人 ， 还有 22 人 两 科 都 没 优秀 ． 语文 、 数字 成绩 都 优秀 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9498", "content": "某 工厂 原来 每天 用电 0.8 万度 ， 实际 每天 节约用电 0.05 万度 ． 原来 30 天 用 的 电 ， 现在 可以 多用 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8495", "content": "一 列 火车 前 3 个 小时 行驶 了 360 千米 ， 然后 将 速度 提高 了 10% ， 又 行驶 了 2 小时 ， 那么 火车 一共 行驶 了 多少 千米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9257", "content": "把 一根 8 米 的 木头 平均 分成 4 段 ， 每 据 一段 需要 6 分钟 ， 据 完 一共 要 花 多少 时间 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2231", "content": "在 一个 盒子 里 红 、 黄 、 蓝球 的 个数 比 为 3 ： 4 ： 5 ． 从 盒子 里 任意 摸 出 一个 ， 摸 出 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3737", "content": "比 125 的 8 倍 少 25 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2020", "content": "某 厂 17 寸 液晶 显示器 已经 生产 了 25 万台 . 19 寸 液晶 显示器 已经 生产 了 35 万台 ． 这些 已经 生产 了 今年 计划 总产量 的 (15/31) ． 今年 计划 生产 显示器 多少 万台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8455", "content": "甲 、 乙 两 人 骑车 分别 从 a 、 b 两地 同时 出发 相向 而 行 ， 甲 时速 11 千米 ， 乙 时速 15 千米 ， 途中 相遇 后 又 离去 ， 已知 出发 4 小时 后 两 人 相距 30 千米 ， 问 a 、 b 两地 相距 多少 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3173", "content": "小 美的 家 离 学校 1200 米 ， 小 美 去 上学 ， 已 行 的 路程 与 未 行 的 路程 之 比 是 3 ： 5 ， 已 行 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17711", "content": "爸爸 买 一张 桌子 用 了 400 元 ， 比 买 一把 椅子 贵 80 元 ， 买 一套 这样 的 桌椅 一 共用 了 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20674", "content": "一 个 打字员 打 一篇 稿件 ． 第一天 打 了 30 页 ， 第 二 天 比 第一天 多 打 20 页 ， 两天 共 打 了 这 篇 稿件 的 (4/7) ． 这 篇 稿件 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14453", "content": "有 甲 、 乙 两个 书架 ， 甲 书架 有 书 300 本 ， 若 把 甲 书架 书 的 (1/6) 放到 乙 书架 ， 则 甲 、 乙 两个 书架 的 书 的 本 数 相等 ． 乙 书架 原来 有 书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3665", "content": "甲乙 两辆 汽车 同时 从 相距 480 千米 的 两地 相对 开出 ， 经过 3.2 小时 两车 相遇 ． 已知 乙 车 每 小时 行 72 千米 ， 甲 车 每 小时 行 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17408", "content": "小 军 读 一 本书 ， 7 天 读 了 这 本书 的 (2/3) ， 以后 5 天 共 读 40 页 ， 正好 读完 ． 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15881", "content": "狗 追 兔 ， 兔 在 狗 前面 150 英尺 ， 已知 狗 跳 一次 9 英尺 ， 兔 跳 一次 7 英尺 ， 问 狗 跳 多少 次 才能 追 上 兔 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13696", "content": "一 辆 小汽车 从 甲地 开往 乙地 ， 同时 一辆 大客车 从 乙地 开往 甲地 ． 小汽车 每 小时 行驶 75 千米 ， 行驶 5 小时 到达 ， 在 遇上 大客车 时 正好 行驶 了 3 小时 ， 这辆 大客车 每 小时 行驶 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12867", "content": "一 堆 煤 3.6 吨 ， 计划 可以 烧 10 天 ， 改进 炉灶 后 ， 每天 比 原 计划 节约 0.06 吨 ， 这 堆 煤 现在 可以 烧 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23043", "content": "李 庄 距 王 庄 1500 米 ， 张 叔叔 每分钟 走 80 米 ， 走 了 15 分钟 ， 距 王 庄 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16096", "content": "饲养场 养鸭 12 万 只 ， 养 鹅 8 万 只 ， 养鸡 只 数 比 鸭 和 鹅 总 只 数 还 多 2 万 只 ， 养鸡 多少 万 只 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6006", "content": "一 本书 共有 270 页 ， 小 丽 第一天 读 了 全书 的 (4/15) ， 第 二 天 读 了 剩下 的 (4/9) ， 这时 她 已经 读 了 多少 页 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "21452", "content": "一 个 平行四边形 的 面积 是 45 m ^ 2 ， 底 是 15 米 ， 它 的 高 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19954", "content": "小 明 录入 一份 稿件 ， 录入 了 (2/9) 后 还 剩 2800 字 ， 这份 稿件 共有 多少 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16812", "content": "把 一个 最 简分数 的 分子 扩大 7 倍 ， 得 3 ， 这个 最 简分数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10782", "content": "小 太阳 服装厂 生产 一批 儿童服装 ， 计划 每 小时 生产 120 套 ， 25 小时 完成 ． 实际 每 小时 生产 200 套 ， 实际 多少 小时 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11211", "content": "幼儿园 老师 把 一些 苹果 分给 小朋友 ， 如果 每人 分 1 个 ， 则 多 18 个 苹果 ； 如果 每人 分 3 个 ， 则 少 12 个 苹果 ． 那么 幼儿园 一共 有 多少 个 小朋友 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19471", "content": "有 两根 铁管 绑 在 一起 长 380 厘米 ， 其中 一根 长 190 厘米 ， 重叠 部分 长 65 厘米 ， 另 一根 铁管 长 多少 厘米 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7801", "content": "一 种 铁丝 20 米 重 5 千克 ， 如果 一捆 同样 的 铁丝 100 千克 ， 这 捆 铁丝 长 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17217", "content": "今年 同学 们 共 植树 100 棵 ， 其中 六年级 植树 的 棵 数 是 总数 的 (2/5) ， 五年级 植树 的 棵 数 是 六年级 的 (7/8) ， 五年级 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20708", "content": "若 6 （ 2 ） 班 某 小组 10 名 学生 的 平均分 是 85 分 ， 则 调进 一位 成绩 是 96 分 的 同学 后 的 平均分 = 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "101", "content": "某 工厂 积极开展 植树 活动 ． 第一 车间 45 人 ， 第 二 车间 42 人 ， 平均 每人 植树 8 棵 ． 两个 车间 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18533", "content": "从 一个 数里 减去 54 还 剩 28 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22829", "content": "两辆 汽车 同时 从 两地 相对 开出 ， 经过 5 小时 相遇 ． 已知 甲 车 每 小时 行 50 千米 ， 乙 车 每 小时 行 58 千米 ， 求 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13486", "content": "学校 舞蹈队 有 40 人 ， 合唱队 的 人数 比 舞蹈队 多 (1/4) ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2689", "content": "李老师 买来 故事书 42 本 ， 连环画 28 本 ， 分给 同学 54 本 ， 李老师 还有 多少 本书 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6476", "content": "修 一条 路 ， 第一天 修 了 全长 的 (2/15) ， 第 二 天 修 了 全长 的 (3/20) ， 还 剩 全长 的 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22865", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已 行驶 了 全程 的 25% ， 还 剩下 120 千米 ， 已 行 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17920", "content": "450 连续 减去 50 ， 减 多少 次 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1793", "content": "张 红 到 精品店 购买 一些 圣诞卡 ， 由于 圣诞卡 减价 20% 促销 ， 因而 她 带 的 钱 可比 原 计划 多 买 6 张 ， 张 红 原 计划 要 买 多少 张 圣诞卡 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19555", "content": "(7/8) / (3/5) = ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6785", "content": "甲 、 乙 、 丙 3 个 工 队 给 一栋 住房 进行 装修 ， 甲队 装 了 600 小时 ， 乙 队 装 了 900 小时 ， 丙 队 装 了 1500 小时 ． 装 好 后 按 装修 时间 分配 工钱 ， 丙 队 比 乙 队 多 得 51 万元 ． 那么 ， 甲队 比 乙 队 少 得 多少 工钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4475", "content": "某 工厂 只有 4 名 师傅 和 16 名 徒弟 ， 师傅 人数 占 工厂 总 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16497", "content": "商店 运 来 苹果 和 桔子 各 11 箱 ， 每箱 苹果 重 28 千克 ， 每箱 桔子 重 21 千克 ， 运进 苹果 比 桔子 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12352", "content": "一 个 袋子 里 有 红球 2 个 、 黄 球 5 个 ， 任意 摸 出 一个 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7928", "content": "水果店 进 了 一批 西瓜 ， 第一天 卖 了 (1/3) 还 多 60 千克 ， 第 二 天 把 剩下 的 20 千克 全部 卖完 ， 这 批 西瓜 共有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6503", "content": "欢欢 读 一本 240 页 的 故事书 ， 第 1 天 读 了 全书 的 (1/3) ， 第 二 天 读 了 全书 的 (1/4) ， 还 剩 多少 页 没有 读 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14181", "content": "运走 一堆 土 ， 如果 每天 运 30 车 ， 需要 20 天 才能 运 完 ． 现在 提前 5 天 完成 任务 ， 每天 要 运 多少 车 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14904", "content": "水果店 有 桔子 72 千克 ， 桔子 是 香蕉 的 (8/9) ， 香蕉 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7864", "content": "刘 叔叔 月 收入 1800 元 ， 如果 按规定 ， 超过 1500 元 的 部分 按 5% 缴纳 个人所得税 ， 刘 叔叔 实 得 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14503", "content": "一 本书 有 200 页 ， 第一天 看 了 这 本书 的 (5/8) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22843", "content": "王老师 为 学校 购买 一些 篮球 ， 第一次 买 回 15 个 ， 第 二 次 买 回 同样 的 篮球 29 个 ， 两次 付 的 钱 数 相差 641.2 元 ， 王老师 第一次 付 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19190", "content": "某 商场 这个 月 的 销售额 是 680 万元 ， 比 上 月 降低 了 (1/4) ， 上 月 的 销售额 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13869", "content": "六年级 上 学期 的 期末 数学考试 ， 甲班 45 人 ， 平均 80.25 分 ； 乙班 50 人 ， 平均 82.34 分 ． 两个 班 的 平均 成绩 = 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15401", "content": "某 食品厂 计划 生产 1600 盒 月饼 ， 已经 生产 了 16 天 ， 每天 生产 40 盒 ． 剩下 的 还要 生产 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5809", "content": "某 工人 一天 生产 的 次品 与 合格品 的 比 是 1 ： 49 ， 其 产品 的 合格率 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5973", "content": "有 一个 等腰三角 形 ， 相邻 两条 边 分别 长 7 厘米 和 3 厘米 ， 这个 三角形 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22173", "content": "小 红 看 一 本书 ， 每天 看 15 页 ， 4 天 后 还 剩 全书 的 (3/5) 没 看 ， 这 本书 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8396", "content": "小 芳 买 了 8 个 练习本 ， 付出 5 元 ， 找回 0.2 元 ， 每个 练习本 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2959", "content": "小 庆 走 了 8 步 ， 一共 走 了 560 厘米 ． 小 庆 平均 每步 走 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21011", "content": "两列 火车 从 相距 680 千米 的 两地 同时 相对 开出 ， 快车 每 小时 108 千米 ， 慢车 每 小时 行 62 千米 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2841", "content": "从 果园 运走 8400 千克 梨 ， 是 运 苹果 千克 数 的 4 倍 ， 运走 苹果 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16743", "content": "某种 农具 ， 现在 每 台 售价 23.1 元 ， 比 原来 每 台 售价 降低 23% ， 原来 每 台 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8795", "content": "一 种 玩具 ， 现在 每件 卖 43.2 元 ， 比 原来 降低 了 20% ， 原来 每件 卖 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18841", "content": "合唱队 有 男生 46 名 ， 女生 的 人数 是 男生 的 3 倍 ， 合唱队 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1834", "content": "存车 棚里 有 自行车 60 辆 ， 摩托车 比 自行车 多 25% ， 摩托车 有 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16841", "content": "某 同学 用 两天 时间 读完 一 本书 ， 第一天 读 的 比 全书 的 (1/2) 多 72 页 ， 第 二 天 读 了 第一天 的 (1/3) ， 这 本书 共 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2654", "content": "某 厂 为 支援 玉树 抗震救灾 赶制 一批 帐蓬 ， 第一天 生产 了 总数 的 (1/4) ， 第 二 天 生产 了 总数 的 30% ， 两天 共 生产 了 880 顶 ． 这 批 帐蓬 有 多少 顶 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19681", "content": "甲乙 两地 相距 660 千米 ． 一辆 汽车 从 甲地 开出 ， 每 小时 行 72 千米 ． 另 一辆 汽车 从 乙地 开出 ， 每 小时 行 48 千米 ． 两车 同时 开 ， 相向 而 行 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6930", "content": "修路 队 修 一条 公路 ， 第一天 修 了 全长 的 (7/12) ， 第 二 天 比 第一天 少 修 了 全长 (1/5) ， 还 剩 几分 之 几 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8504", "content": "汽车 每 小时 行驶 40 千米 ， 是 火车 速度 的 (5/9) ， 火车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13328", "content": "甲乙 两辆 汽车 同时 从 a 、 b 两地 相对 开出 ， 经过 5 小时 相遇 ． 相遇 后 ， 继续 按 原来 的 速度 前进 ． 又 经过 3 小时 ， 甲 车 到达 a 地 ， 乙 车 距 a 地 还有 120 千米 ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "4114", "content": "一 根 绳 长 (1/2) 米 ， 剪 去 它 的 (2/3) 后 ， 比 原来 短 了 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13493", "content": "一 本书 ， 看 了 (4/9) ， 还 剩下 这 本书 的 ( ( ( ) ) / ( ( ) ) ) 没有 看 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12346", "content": "某村 要 修 一条 公路 ， 计划 每天 修 0.5 千米 ， 24 天 完成 ； 实际 每天 比 原 计划 多 修 0.1 千米 ， 实际 多少 天 可以 修 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16560", "content": "一 堆 煤 重 220 吨 ， 第一天 用 去 (1/5) ， 第 二 天 用 去 (1/4) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5533", "content": "刘 洋 上学 途中 路过 超市 ， 从 家 到 超市 的 时间 和 从 超市 到 学校 的 时间 都 用 了 12 分钟 ， 从 家 到 超市 的 速度 是 每分钟 60 米 ， 从 超市 到 学校 的 速度 是 每分钟 70 米 ， 求 从 家 到 学校 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5866", "content": "截 一段 电线 ， 第一次 截 了 全长 的 (3/8) ， 第 二 次 截 了 全长 的 (1/8) ， 剩下 的 是 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1436", "content": "学校 买来 一批 书 ， 其中 文艺 书 有 120 本 ， 占 这 批 书 总量 的 60% ， 学校 买来 这 批 书 共 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14720", "content": "贝 贝 要 去 外婆家 ， 他 家门口 有 一根 路灯 杆 ， 从 这根 杆 开始 ， 他 边 走 边 数 ， 每 50 步 有 一根 路灯 杆 ， 数 到 第 10 根 时 刚好 到 外婆家 ， 他 一共 走 了 多少 步 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20065", "content": "果 店 运 来 一些 水果 ， 其中 桔子 80 千克 ， 桔子 的 重量 相当于 苹果 的 (1/4) ， 运 来 苹果 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23048", "content": "同学 们 做 了 420 朵 红花 ， 红花 的 朵 数 比 黄花 的 3 倍 还 多 60 朵 ， 黄花 有 几朵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6809", "content": "光明 小学 为 200 名 学生 投保 “ 平安保险 ” ， 保险金额 每人 4000 元 ， 保险期限 一年 ． 按 年 保险费率 0.4% 计算 ， 学校 应付 保险费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9873", "content": "服装 小组 计划 做 500 件 女式 大衣 ， 已经 做 了 4 天 ， 每天 做 106 件 ， 还 差 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11006", "content": "一 个 足球 68 元 ， 现在 搞 促销 ， 0.9 出售 ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18822", "content": "学校 有 篮球 60 个 ， 足球 比 蓝球 少 (1/4) ， 足球 有 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6534", "content": "乐乐 和 欣欣 一共 有 160 本书 ， 已知 乐乐 和 欣欣 的 图书 本 数 比 是 5 ： 3 ． 乐乐 有 多少 本书 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19904", "content": "铺 一条 从 乜 江 到 桂 芽 的 通 村 公路 ， 原 计划 每天 铺 800 米 ， 6 天 铺 完 ． 实际 4 天 铺 完 ， 实际 每天 比 原 计划 多 铺 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22827", "content": "从 甲地 到 乙地 ， 客车 需 12 小时 ， 货车 需 15 小时 ， 客 、 货 两车 分别 从 甲乙 两地 同时 相对 开出 ， 相遇 时 客车 比 货车 多行 98 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2392", "content": "一 个 学校 为 450000 元 的 财产 进行 保险 ， 保险费率 为 1.2% ， 保险 3 年 ， 一共 应付 出 保险费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12234", "content": "仓库 要 运出 一批 产品 ， 两天 运 完 ， 第一天 运出 全部 的 (3/7) ， 比 第 二 天 少 运出 120 件 ， 这 批 产品 共有 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16146", "content": "商品 标价 50 元 ， 按 “ 0.7 ” 出售 ， 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14987", "content": "计算 ： (7/12) / (2/3) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16658", "content": "一 堆 煤 重 (3/8) 吨 ， 运走 了 (3/40) 吨 ， 还 剩 多少 吨 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12322", "content": "世界 上 最大 的 动物 是 蓝鲸 ， 蓝鲸 的 体重 可 达 33 吨 ， 比 抹香鲸 的 体重 重 (5/6) ． 抹香鲸 的 体重 = 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16530", "content": "两地 相距 120 千米 ， 甲 、 乙 两 人 骑 自行车 同时 从 两地 相对 出发 ， 经过 4 小时 相遇 ， 甲 每 小时 行 14 千米 ， 乙 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3682", "content": "某 车间 计划 去年 创收 8 万元 ， 实际 比 计划 多 收入 (1/8) ， 实际收入 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1933", "content": "6 （ 1 ） 班 有 50 人 ， 学校 开 运动会 到校 参加 活动 的 出勤率 是 98% ， 到校 参加 活动 的 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14715", "content": "两地 相距 420 千米 ， 甲乙 两车 同时 从 两地 相对 开出 ， 3 小时 相遇 ， 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10082", "content": "一 辆 货车 每 小时 行驶 55 千米 ， 而 一辆 轿车 的 速度 比 货车 的 速度 的 3 倍 少 1 千米 ， 轿车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20469", "content": "98.28 / 3.6 与 0.25 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11257", "content": "小 丽 准备 用 7 天 时间 看 完 一本 168 页 的 《 童话故事 》 ， 她 平均 每天 要 看 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14614", "content": "学校 为 40 名 教职工 每人 做一套 校服 ， 已知 每件 衣服 76 元 ， 每 条 裤子 64 元 ， 做 这些 校服 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18922", "content": "小 明 买 了 5 本 练习本 和 8 支 铅笔 ， 一共 花 了 6.85 元 ， 已知 每 本 练习本 0.65 元 ， 每支 铅笔 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10955", "content": "学校 去 市场 购买 23 台 录音机 ， 每 台 录音 299 元 ， 付给 售货员 7500 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12006", "content": "某校 师生 开展 行军 活动 ， 以 每 小时 6 千米 的 速度 前进 ， 3 小时 后 学校 派 通 迅 员 骑 自行车 走 同 一条 路 去 传达 命令 ， 如果 通讯员 以 每 小时 15 千米 的 速度 去 追赶 队伍 ， 需要 多少 小时 才能 赶上 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10141", "content": "甲乙 两地 相距 550 千米 ， a 、 b 两车 同时 从 两地 相对 开出 ， a 车 每 小时 行 60 千米 ， b 车 速度 是 a 车 的 (5/6) ， 几小时 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16230", "content": "乐乐 看 《 十 万个 为什么 》 ， 第一天 看 了 全书 的 25% ， 第 二 天 看 了 全书 的 (2/5) ， 还 剩 70 页 没 看 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17657", "content": "两个 底 面积 相等 的 圆柱 ， 一个 圆柱 的 高 是 4.5 分 米 ， 体积 是 81 立方分米 ； 另 一个 圆柱 的 高 是 3 分 米 ， 体积 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3918", "content": "一 次 跳绳 比赛 ， 小 亮 和 小 笨 共 跳 了 360 下 ， 小 亮 跳 的 是 小 笨 的 8 倍 ， 那么 小 笨 跳 了 多少 下 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8201", "content": "在 一个 长 4 厘米 ， 宽 3 厘米 的 长方形 内 画 一个 最大 的 圆 ， 这个 圆 的 周长 = 多少 cm ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4827", "content": "六年级 的 同学 积极 捐款 救助 贫困地区 的 失学 儿童 ． 小 亮 捐款 180 元 ， 小 明 捐 的 钱 是 小 亮 的 (5/6) ， 小 青 捐 的 钱 是 小 明 的 (2/3) ． 小 青 捐 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1425", "content": "妈妈 用 一个 煤气炉 做 家务 ， 洗米 需要 1 分钟 ， 煮饭 需要 15 分钟 ， 洗菜 需要 5 分钟 ， 炒菜 需要 10 分钟 ． 做 完 这些 家务活 ， 妈妈 至少 需要 多少 分钟 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8765", "content": "一 个 长方体 箱子 长 (7/8) 米 ， 宽比 长短 (1/3) ， 高 是 (1/2) 米 ． 这个 长方体 箱子 的 占地面积 = 多少 平方米 ﹖", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5301", "content": "小 明 读 一本 400 页 的 故事书 ， 读 了 一部分 后 还 剩 180 页 没有 读 ． 小 明 读 了 这本 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "583", "content": "学校 植树 ， 第一天 完成 了 计划 的 (3/8) ， 第 二 天 完成 了 余下 计划 的 (2/3) ， 第 3 天 植树 110 棵 ， 结果 超过 计划 的 (1/4) ， 原 计划 植树 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8869", "content": "小 华 有 课外书 120 本 ， 小 平 课外书 的 本 数 是 小 华 的 (4/5) ， 小 兰 课外书 的 本 数 是 小 平 的 (3/4) ． 小 兰 有 课外书 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12211", "content": "一 款 电脑 原价 7800 元 ， 国庆节 期间 促销 降价 (1/13) ， 这 款 电脑 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21624", "content": "一 个 最 简分数 的 分子 扩大 4 倍 ， 分母 缩小 到 (1/3) ， 化简 为 10 ， 该 分数 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14410", "content": "一 头 大象 体重 5.25 吨 ， 一头 鲸 的 体重 约 是 大象 的 30 倍 ， 一头 鲸 的 体重 有 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "750", "content": "妈妈 买 一条 裤子 和 4 双 袜子 一共 花 了 60 元 ， 一条 裤子 48 元 ， 一双 袜子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12058", "content": "张 叔叔 练习 打靶 ， 共 打 了 40 发 子弹 ， 命中率 为 80% ， 脱靶 的 子弹 有 多少 发 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22996", "content": "有 10 颗 糖 ， 小 明 拿走 这些 糖 的 (1/2) ， 他 拿走 了 多少 颗 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16773", "content": "旅游 商场 一套 西服 原价 420 元 ， 现在 换季 打 0.8 ， 李 叔叔 买 这 套 衣服 可 节约 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4853", "content": "从 120 里 连续 减去 4 ， 减 多少 次 后 ， 所得 的 结果 是 12 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22696", "content": "师徒俩 人 加工 同样 多 的 零件 ， 当 师傅 完成 (1/2) 时 ， 徒弟 完成 120 个 ． 当 师傅 完成 任务 时 ， 徒弟 完成 (4/5) ． 则 师傅 加工 零件 多少 个 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1206", "content": "一 种 商品 打 0.8 后 卖 96 元 ， 这种 商品 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23070", "content": "妈妈 在 超市 买 了 5.5 千克 西红柿 ， 付出 20 元 ， 找回 2.4 元 ． 每千克 西红柿 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17275", "content": "妈妈 买 一瓶 可乐 3.25 元 ， 一袋 大米 45.5 元 ， 付给 售货员 50 元 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1460", "content": "一 家 服装厂 要 做 350 件 衣服 ， 已经 完成 了 130 件 ， 剩下 的 要 在 4 天 里 完成 ， 平均 每天 做 多少 件 衣服 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10746", "content": "5.46 / 10.92 的 商 ， 减去 1.2 的 50% ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16013", "content": "一 台 电视机 打 0.8 出售 是 880 元 ， 这种 电视机 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5752", "content": "一 种 服装 降价 30% 后 ， 每件 只 卖 70 元 ， 这种 服装 原来 每件 卖 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "964", "content": "一 台 电视机 原价 8000 元 ， 现在 降价 (1/8) ， 现在 一台 电视机 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6694", "content": "学校食堂 进 一批 大米 ， 每天 吃 40 千克 ， 计划 吃 15 天 ． 由于 人数 减少 ， 实际 每天 只 吃 25 千克 ． 实际 比 计划 可 多 吃 几天 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5638", "content": "某班 36 个 同学 ， 在 一次 测试 中 ， 答对 第一 题 的 有 25 人 ， 答对 第 二 题 的 有 23 人 ， 两 题 都 答对 的 有 16 人 ， 那么 两 题 都 不 对 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10517", "content": "某 学校 去年 栽树 24000 棵 ， 今年 栽树 25200 棵 ， 今年 比 去年 多 栽 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14395", "content": "一 辆 货车 每 小时 行 60 千米 ． 一辆 客车 每 小时 行 80 千米 ． 货车 出发 2 小时 后 客车 也 沿 同 一条 路 出发 ． 多少 时间 后 能 追 上 货车 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5631", "content": "学校 附属 幼儿园 订 了 24 箱 牛奶 ， 每箱 4 盒 ， 每盒 15 袋 ， 幼儿园 一共 订 了 多少 袋 牛奶 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2000", "content": "张 林带 了 10 元 钱 ， 买 了 一副 乒乓球拍 和 一盒 乒乓球 ， 一副 乒乓球拍 7.8 元 ， 一盒 乒乓球 1.5 元 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1097", "content": "学校 美化 校园 ， 购进 一批 月季花 ， 如果 每行 栽 30 棵 ， 可以 栽 25 行 ， 如果 改 栽 成 每行 15 棵 ， 可以 栽 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19353", "content": "园艺场 有 120 棵 柳树 ， 柳树 的 棵 数 是 杨树 的 (5/9) ， 杨树 的 棵 数 是 松树 的 (4/15) ， 松树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18562", "content": "饲养场 有 鸡 500 只 ， 鸭 600 只 ， 鸭 比 鸡 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "920", "content": "有 一块 重量 为 6 吨 的 石料 ， 如果 1 立方米 的 这种 石料 的 重量 是 2.5 吨 ， 那么 这块 石料 的 体积 = 多少 立方米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18199", "content": "仓库 里 有 一批 货物 ， 第一次 运走 14.58 吨 ， 第 二 次 比 第一次 少运 1.92 吨 ． 两次 共 运走 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5504", "content": "一 辆 汽车 (2/3) 小时 行 40 千米 ， 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23139", "content": "某 工地 需要 水泥 50 吨 ， 用 一辆 载重 4 吨 的 汽车 运 了 5 次 ， 余下 的 改用 一辆 载重 2.5 吨 的 汽车 运 ， 还要 运 几次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12805", "content": "白菜 售价 是 (4/5) 元 ， 是 茄子 售价 的 (2/3) ， 萝卜 售价 是 茄子 售价 的 (3/4) ， 萝卜 售价 = 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7645", "content": "雅乐 学校 体育 室 买来 6 盒 小 皮球 ， 每盒 16 只 ， 后来 又 买来 同样 的 8 盒 ， 体育课 上 平均 分给 一年级 7 个 班 ， 每班 分 到 多少 只 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8034", "content": "每吨 甘蔗 可以 制糖 (1/8) 吨 ， 制 1 吨 糖 需要 多少 吨 甘蔗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6291", "content": "2001 年 世界 野生 丹顶鹤 共 2000 只 ， 我国 占 其中 的 25% ， 其他 国家 共有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10375", "content": "小 明 坐在 火车 的 窗口 位置 ， 火车 从 大桥 的 南端 驶向 北端 ， 小 明 测 得 共用 时 80 秒 ， 爸爸 问 小 明 这 座 桥 有 多长 ， 于是 小 明 马上 从 铁路 旁 的 某 一根 电线杆 计时 ， 直到 第 10 根 电线杆 用 时 25 秒 ， 如果 路旁 每 两根 电线杆 的 距离 为 50 米 ， 小 明 算 出 了 大桥 的 长度 ． 大桥 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15909", "content": "14 与 72 的 积 ， 减去 900 / 3 所得 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21611", "content": "商场 某种 衣服 打 0.8 后 的 价钱 是 72 元 ， 这种 衣服 在 未 打折 时 的 价钱 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12597", "content": "250 / 50 的 商 乘 29 与 11 的 差 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18663", "content": "某 伞 厂 为 支援 西南 旱区 赶 产 一批 帐篷 ， 第一天 生产 了 总 帐篷 数 的 20% ， 第 二 天 生产 了 总 帐篷 数 的 (7/20) ， 两天 共 生产 帐篷 2200 顶 ． 这 批 帐篷 一共 有 多少 顶 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17161", "content": "两全 工程队 合 开 一条 长 675 米 长 的 隧道 ， 同时 各 从 一端 向 另一端 开凿 ， 第一队 每天 开 12.6 米 ， 第 二 队 每天 开 14.4 米 ， 这 条 隧道 要 用 多少 天 才能 打通 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "787", "content": "修路 队 要 修 一条 长 19.2 千米 的 路 ， 计划 12 天 修 完 ， 实际 每天 比 计划 多 修 0.4 千米 ， 实际 多少 天 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20492", "content": "一 列 火车 从 a 地 开往 b 地 ， 已经 行 了 全程 的 (3/5) ， 正好 行 了 120 千米 ． ab 两地 之间 的 铁路 长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15363", "content": "一 个 平行四边形 的 底 长 4.8 dm ， 高 3 dm ， 与 这个 平行四边形 等 底 等 高 的 三角形 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18891", "content": "王师傅 计划 生产 一批 零件 ， 每天 生产 90 个 ， 12 天 才能 完成 ． 结果 每天 比 原 计划 多 生产 18 个 ， 可以 提前 几天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10324", "content": "百货商店 第一天 上午 卖出 衣服 372 件 ， 比 下午 多 卖出 39 件 ， 下午 卖出 多少 件 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13829", "content": "12 名 同学 去 湘 湖 游玩 ， 坐 游船 共 付 门票 360 元 ， 每人 乘车 用 3 元 ． 平均 每人 花 了 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16041", "content": "工厂 计划 全年 用 煤 340 吨 ， 结果 上半年 用 煤 145.8 吨 ， 下半年 比 上半年 少 用 2.7 吨 ， 实际 比 计划 节约 用 煤 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19613", "content": "在 36 米 长 的 公路 两旁 栽树 ， 每隔 2 米 栽 一棵 ， 共 需 多少 棵 树 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17117", "content": "库房 有 一批 货物 ， 第一天 运走 20 吨 ， 第 二 天运 的 吨数 比 第一天 多 (6/17) ， 这时 还 剩 这 批 货物 总量 的 (9/17) 没 运 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16192", "content": "王 军 买 了 一 本书 和 一支 笔 ， 书 的 价格 4 元 ， 是 笔 的 (2/5) ， 笔 的 价格 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7776", "content": "一 辆 汽车 箱 里 储油 80 升 ， 行驶 了 56 千米 正好 耗油 8 升 ， 照 这样 计算 ， 剩下 的 油 还 可以 行驶 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5703", "content": "一 种 录音机 ， 按 0.75 出售 ， 现 售价 是 360 元 ， 原来 售价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15453", "content": "一 种 皮鞋 现价 是 每 双 50 元 ， 原价 是 每 双 40 元 ． 这种 皮鞋 提价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5321", "content": "一 个 纽扣 0.5 元 ， 一件 上衣 有 5 个 纽扣 ， 两个 袖子 各 有 2 个 纽扣 ， 一件 上衣 的 扣子 共 需 多少 元 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19256", "content": "新华 小学 去年 培植 绿地 400 平方米 ， 今年 计划 比 去年 增加 25% ， 今年 培植 绿地 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10216", "content": "在 学校 举行 的 “ 我 爱 妈妈 ” 的 征文 比赛 活动 中 ， 五年级 有 35 个 同学 参赛 ． 四年级 参赛 人数 是 五年级 参赛 人数 的 (4/7) ， 是 六年级 参赛 人数 的 (5/9) ． 六年级 有 多少 个 同学 参赛 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14380", "content": "计算 32 * 6 + 24 / 3 时 ， 可以 同时 先 算 多少 法 和 多少 法 ， 再 算 多少 法 ， 结果 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16898", "content": "一 位 老师 说 ： “ 我 现在 的 年龄 加上 4 后 除以 3 ， 再 减去 14 ， 最后 用 25 乘 ， 正好 是 100 ． ” 这位 老师 今年 几岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19466", "content": "3 （ 1 ） 班 45 人 去 郊游 ． 租 的 车 每辆 只能 坐 15 人 ， 租金 120 元 ． 全班 租车 共 花 了 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21682", "content": "一 台 饮水机 价格 是 105 元 ， 一台 微波炉 的 价钱 是 饮水机 的 3 倍 ， 王 叔叔 买 一台 饮水机 和 一台 微波炉 一共 要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15727", "content": "商店 里 有 一批 鸡蛋 ， 第一天 卖出 总数 的 (1/4) ， 第 二 天 卖出 总数 的 (2/5) ， 两天 一共 卖出 39 箱 ， 这 批 鸡蛋 共有 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15215", "content": "花生 的 出油率 是 40% ， 运 来 50 袋 花生 ， 平均 每 袋 40 千克 ， 共 可以 出 花生油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "786", "content": "小 樱 用 一条 10 米 长 的 彩带 包装 花束 ． 包装 康乃馨 用 去 彩带 的 35% ， 包装 百合花 剪 去 15% ． 已经 用 去 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13496", "content": "商店 运 来 梨 和 苹果 各 15 筐 ， 每 筐 苹果 重 24 千克 ， 每 筐 梨 重 26 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7568", "content": "一 个 书包 原价 是 35 元 ， 现在 降 了 (1/5) 的 价格 出售 ， 现在 每个 书包 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16345", "content": "有 24 枝 铅笔 ， 每个 盒子 放 6 枝 ， 需要 多少 个 盒子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13943", "content": "小 新 在 第一家 商店 花 了 他 全部 钱 的 (2/3) ， 在 第 二 家 商店 花 了 余下 的 (1/3) ， 这时 他 还 剩下 4 元 钱 ． 小 新 原来 有 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22929", "content": "皮鞋厂 要 做 910 双 童鞋 ， 如果 有 26 个人 ， 每人每天 做 5 双 ， 几天 能 做 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14443", "content": "鸡 养 了 1200 只 ， 比 鸭 少 20% ． 鸭 养 了 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2910", "content": "某校 有 五年级 学生 150 人 ， 其中 男生 占 60% ， 女生 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16557", "content": "(4/5) - (2/3) 的 差 乘 一个 数 得 (2/7) ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19552", "content": "果园 里 有 橙 果 58 棵 ， 柑果 有 522 棵 ， 柑果 的 棵 数 是 橙 果 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8903", "content": "织布厂 5 月份 前 11 天 每天 织布 560 米 ， 后 20 天 共 织布 14300 米 ， 这个 月 平均 每天 织布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18876", "content": "某 工厂 有 一堆 煤 共 (4/5) 吨 ， 用 去 (2/3) ． 用 去 了 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17826", "content": "一 个 因数 是 20 ， 另 一个 因数 是 34 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "237", "content": "一 个 长 18 cm ， 宽 12 cm ， 高 5 cm 的 长方体 ， 切 一刀 ， 使 它 成为 两个 完全 一样 的 长方体 ， 并且 切面 最大 ， 切面 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2743", "content": "一 位 有名 的 作家 在 一家 网站 上 发表 了 一 文章 ， 获得 稿费 2000 元 ， 为此 她 需要 按 5% 的 税率 缴纳 个人所得税 ， 她 应 缴 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18207", "content": "一 只 兔子 每 时 跑 55 千米 ， 一只 鸵鸟 每 时 跑 的 路程 是 兔子 的 1.2 倍 ， 一只 羚羊 每 时 跑 的 路程 是 鸵鸟 的 1.3 倍 ． 羚羊 每 时 跑 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12982", "content": "多少 / 8 = 15 … 6 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2515", "content": "(5/12) * (6/20) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5536", "content": "6 加上 一个 数 的 (1/5) 等于 7 ， 这个 数 应 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15844", "content": "一 个 修路 队 修 一条 长 720 米 的 公路 ， 已经 修 了 25 天 ， 平均 每天 修 24 米 ， 剩下 的 如果 每天 修 30 米 ， 还 需要 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4136", "content": "甲乙 两列 火车 从 相距 500 千米 的 两地 同时 相对 开出 ， 甲 车 每 小时 行 80 千米 ， 2 小时 后 两车 还 相距 全程 的 (2/5) ， 乙 车 每 小时 行 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3174", "content": "一 个 平行四边形 底 是 8 厘米 ， 高 是 6 厘米 ， 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14719", "content": "一 辆 汽车 以 每 小时 60 千米 的 速度 从 武汉 开往 长沙 ， 3 小时 行 了 全程 的 (4/5) ． 武汉 到 长沙 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14324", "content": "15 吨 的 40% = 多少 的 50% ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3959", "content": "养鸡 厂 有 大 鸡 120 只 ， 小鸡 80 只 ， 小鸡 的 只 数 是 大 鸡 只 数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5832", "content": "新民 村 新建 了 4 幢 楼房 ， 每 幢 楼房 有 25 层 ， 每 住 5 户 人家 ， 一共 可以 住 多少 户 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15744", "content": "王 李 两位 师傅 做 一批 零件 ， 王师傅 做 了 40 个 ， 占 总数 的 (2/5) ， 李师傅 做 了 总数 的 (1/4) ， 李师傅 做 了 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9712", "content": "一 批 货物 ， 第一次 运走 总数 的 25% ， 第 二 次 运走 总数 的 20% ， 两次 共 运走 135 吨 ， 这 批 货物 一共 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13928", "content": "用 一个 杯子 向 一个 空瓶 里 倒水 ， 如果 倒 进 3 杯水 ， 连 瓶 共 得 440 克 ； 如果 倒 进 5 杯水 ， 连 瓶 共 重 600 克 ， 一杯 水 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1642", "content": "一 种 服装 原来 每件 售价 是 60 元 ， 现在 打 0.8 销售 ， 现在 每件 售价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20159", "content": "有 甲乙 两个 仓库 ， 甲 库存 粮 的 (2/3) 正好 是 乙 库存 粮 的 60% ， 已知 乙 库存 粮 1500 吨 ， 求 乙 库比 甲 库 多 存 多少 吨粮 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17186", "content": "学校 图书室 里 有 连环画 册 90 本 ， 已知 连环画 册 的 本 数 是 科技 书 的 (3/4) ， 故事书 的 本 数 是 科技 书 的 (1/3) ． 故事书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10038", "content": "某 工程队 修 一条 长 7500 米 的 公路 ， 已经 工作 了 8 天 ， 平均 每天 修 240 米 ， 剩下 的 要求 在 20 天 内 完成 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11140", "content": "商 和 除数 都 是 7 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "165", "content": "甲 、 乙 两列 火车 从 相距 1050 千米 的 两地 同时 相对 开出 ， 甲 车 每 小时 行 80 千米 ， 2.8 小时 后 两车 相距 全程 的 60% ． 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11698", "content": "小 明 家 养鸡 684 只 ， 养 鹅 76 只 ． 养鸡 的 只 数 是 鹅 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12182", "content": "土豆 每千克 售价 2.4 元 ， 一 菜农 为了 让 市民 多 买货 ， 把 原价 打 了 折扣 ． 已知 买 25 千克 就 少 花 6 元 ， 问 这个 菜农 按 原价 的 百分之几 出售 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14279", "content": "一 台 电脑 降价 (1/4) 后 标价 是 2400 元 ． 这 台 电脑 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16609", "content": "买 一只 椅子 8 元 ， 一张 圆桌 72 元 ， 圆桌 的 价钱 是 椅子 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2038", "content": "一 套 课桌椅 的 价钱 是 120 元 ， 其中 椅子 的 价钱 是 课桌 的 (1/3) ． 椅子 比 课桌 少 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5313", "content": "有 960 盒 牛奶 ， 每 24 盒装 一箱 ， 每箱 32 元 ． 这些 牛奶 可 卖 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8875", "content": "从 1997 年 至今 ， 我国 铁路 进行 多次 提速 ． 有 一列 火车 ， 原来 每 小时 行驶 80 千米 ， 提速 后 ， 这 列 火车 的 速度 比 原来 增加 了 40% ． 现在 这 列 火车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20181", "content": "“ 6 一 ” 儿童节 ， 5 （ 2 ） 班 的 学生 做 了 462 朵花 ， 每 6 朵 扎成 一束 ． 如果 每班 分 7 束 ， 可以 分给 几个 班 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10227", "content": "76 + 45 与 13 的 积 ， 所得 的 和 ， 再 减去 274 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11431", "content": "学校 篮球队 有 48 人 ， 比 排球队 的 (2/5) 少 8 人 ， 学校 排球队 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8497", "content": "商场 昨天 卖出 7 盒 钢笔 ， 每盒 8 枝 ， 一共 收入 560 元 ， 每枝 钢笔 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7111", "content": "某 小学 乘 2 辆 大客车 和 3 辆 小客车 去 郊游 ， 大客车 每辆 乘坐 65 名 学生 ， 小客车 每辆 乘坐 24 名 学生 ， 共有 多少 名 学生 去 郊游 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21647", "content": "3 位 同学 参加 体能 测试 ． 经 测试 ， 甲 每秒 跑 5 米 ， 乙 的 速度 是 甲 的 (4/5) ， 是 丙 的 (2/3) ， 丙 每秒 跑 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13171", "content": "商场 以 200 元 / 件 的 成本 购进 一种 商品 ， 并 以 50% 的 利润率 来 定价 ， 但 因为 价高 ， 无人 购买 ， 只好 打 0.85 促销 ， 那么 促销 后 该 商品 的 利润 是 每件 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "12575", "content": "一 袋 大米 41.7 元 ， 一袋 面粉 37.4 元 ； 食堂 买 了 5 袋 大米 、 3 袋 面粉 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5844", "content": "一 个 果园 有 梨树 25 棵 ， 是 苹果树 棵 数 的 (5/8) ， 桃树 棵 数 是 苹果树 棵 数 的 (3/4) ， 桃树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6123", "content": "一 辆 公共汽车 ， 开车 时 车 时 上来 31 人 ， 到 站 时 ， 下去 19 人 ， 又 上来 26 人 ， 现在 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15569", "content": "多少 除以 58 的 商 是 157 ， 余数 是 45 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "399", "content": "六年级 男女生 的 比 是 5 ： 4 ， 其中 男生 有 80 人 ， 六年级 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7162", "content": "食堂 里 大米 的 (4/5) 是 200 千克 ， 用 去 这些 大米 的 (2/5) ， 用 去 大米 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3039", "content": "王先生 看中 了 “ 百姓 春天 ” 一套 5 楼 90 平方米 的 商品房 ， 房子 的 市场价 是 每平方米 4000 元 ． 国家 要求 开发商 将 该 商品房 的 一部分 让 利于 低收入者 ， 该 商品房 面积 中 的 60 平方米 部分 ， 单价 按 房子 市场价 的 (3/4) 计算 ， 超过 部分 按 市场价 计算 ． 王先生 获得 此 住房 最少 要 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15623", "content": "一 种 洗衣机 现在 售价 780 元 ， 比 原价 少 了 (1/4) ， 这种 洗衣机 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13572", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 180 千米 ， 比 全长 的 (4/7) 还 多 20 千米 ． 甲乙 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22499", "content": "春运期间 ， 深圳 到 武汉 的 飞机票 涨价 10% 后 ， 票价 为 880 元 ， 春运 前 的 飞机 票价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2444", "content": "妈妈 买 了 4 米 白布 ， 花布 是 白布 的 3 倍 ， 买 了 几米 花布 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4465", "content": "100 克 盐水 中 有 85 克 水 ， 盐 的 重量 是 水 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18445", "content": "一 辆 汽车 3 小时 行驶 了 180 千米 ， 这辆 汽车 的 速度 可 写作 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20270", "content": "永安 小学 有 760 名 学生 ， 其中 有 5% 的 学生 没有 参加 兴趣 活动 小组 ， 参加 兴趣 活动 小组 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20768", "content": "一 根 长 (9/10) 米 的 铁丝 ， 第一次 剪 去 它 的 (1/10) ， 第 二 次 剪 去 它 的 (2/5) ， 还 剩 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5312", "content": "小 明 与 班上 其他 31 个 学生 ， 每人 写 一张 贺卡 ， 放在 一起 ， 从中 抽取 一张 ， 正好 抽 到 自己 那 一张 的 可能性 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18342", "content": "花园里 种 了 30 棵 小树苗 ． 小 芳 和 小强 给 它们 浇水 ， 小 芳 浇 了 其中 的 (1/6) ， 小强 浇 了 其中 的 (2/5) ． 他们 两 人 一共 浇 了 多少 棵 小树苗 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2323", "content": "李 工程师 月薪 2500 元 ， 按规定 超过 1600 元 的 部分 必须 按 5% 缴纳 个人所得税 ． 李 工程师 每月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6525", "content": "王 叔叔 开车 从 甲 城 到 乙 城 用 (7/6) 小时 ， 比 返回 时 少 用 (1/8) 小时 ， 他 往返 共用 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13226", "content": "某班 图书 角 有 文艺 书 300 本 ， 第一 小组 借 走 了 (1/3) ， 第 二 小组 借 走 了 (1/4) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16776", "content": "学校 买来 480 本书 ， 放在 5 个 书架上 ， 每个 书架 有 4 层 ， 平均 每层 放 了 多少 本书 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20498", "content": "运 一堆 煤 ， 用 载重量 为 8 吨 的 卡车 14 辆 ， 每天 运 6 次 ， 5 天 可以 运 完 ； 如果 用 同样 的 卡车 20 辆 ， 每天 运 7 次 ， 多少 天 可以 运 完 ．", "knowledge": ["*", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "17670", "content": "少儿 书店 运进 15 种 故事书 ， 每种 30 本 ， 卖出 一些 后 ， 还 剩 120 本 ， 卖出 多少 本 故事书 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7477", "content": "8 辆 汽车 16 天 节约 汽油 412.16 kg ， 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13097", "content": "1992 + 1994 + 1996 + 1998 + 2000 + 2002 + 2004 + 2006 + 2008 = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "5355", "content": "3.4 与 2.45 的 积 ， 乘 1.2 ， 结果 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8277", "content": "一 箱 雪 碧 饮料 有 8 瓶 ， 由 4 个人 平分 ， 每瓶 的 售价 是 5 元 ， 问 每人 需 付款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6586", "content": "加工 一批 零件 ， 计划 每天 加工 24 个 ， 25 天 完成 ， 实际 20 天 完成 ， 实际 每天 加工 多少 个 零件 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18522", "content": "修路 队 第一天 修路 15.5 米 ， 第 二 天 修 的 路 比 第一天 修 的 2 倍 少 15 米 ， 两天 共 修 了 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18627", "content": "某班 有 20 人 参加 语文 竞赛 ， 18 人 参加 数学 竞赛 ， 同时 参加 语 数 竞赛 的 有 6 人 ， 这个 班 参加 语 、 数 竞赛 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13697", "content": "栽 一种 树苗 ， 成活率 是 90% ， 为了 保证 成活 126 棵 ， 至少 要 栽 多少 棵 树苗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21590", "content": "一 本 相册 的 价格 是 12.80 元 ， 正好 是 2 本 字典 价格 的 (4/7) ， 求 每 本 字典 的 价格 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4342", "content": "一 堆 煤 ， 第一次 运走 (2/5) 多 50 吨 ， 第 二 次 运走 的 比 第一次 的 (2/3) 少 10 吨 ， 第 3 次 运走 260 吨 ， 正好 运 完 ． 这 堆 煤 共有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "6081", "content": "富 林 小学 今年 毕业 的 有 184 人 ， 比 去年 多 15% ， 去年 有 多少 人 毕业 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10647", "content": "在 一个 长 6 分 米 ， 宽 4 分 米 ， 高 3 分 米 的 长方体 玻璃缸 中 ， 水深 2 分 米 ， 把 一个 颗 岩石 完全 放入 水中 后 ， 水面 上升 了 0.5 分 米 ， 求 该 岩石 的 体积 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14657", "content": "12.5 * 0.5 * 4 * 0.8 运用 多少 律 和 多少 律 可以 使 计算 简便 ， 得数 = ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "15634", "content": "1 千克 的 (5/8) 和 多少 千克 的 (1/8) 的 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12551", "content": "一 块 菜地 的 (5/8) 种 了 白菜 ， 剩下 的 种 芹菜 ． 种 芹菜 的 地 占 整块 菜地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2320", "content": "某村 去年 植树 2400 棵 ， 比 前 年少 20% ， 前年 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3532", "content": "多少 吨 是 120 吨 的 12% ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3102", "content": "3 （ 1 ） 班 有 学生 50 人 ， 其中 25 人 喜欢 吃 苹果 ， 23 人 喜欢 吃 草莓 ， 13 人 既 喜欢 吃 苹果 ， 也 喜欢 吃 草莓 ， 这 两种 水果 都 不 喜欢 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19400", "content": "一 台 组装 电脑 的 成本价 是 4000 元 ， 如果 商家 要 有 以 30% 的 盈利 ， 那么 卖 给 顾客 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16371", "content": "某村 今年 每 百户 拥有 彩电 121 台 ， 去年 每 百户 有 55 台 ， 今年 比 去年 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7591", "content": "今年 小 明 12 岁 ， 是 妈妈 年龄 的 (1/3) ． 妈妈 今年 多少岁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14918", "content": "这个 周末 我 看 了 35 页 ， 正好 是 这本 课外读物 的 (5/7) ， 这本 课外读物 一共 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12545", "content": "a 、 b 两地 相距 650 千米 ， 甲乙 两辆 汽车 分别 从 两地 同时 相向 开出 ， 行驶 了 2.5 小时 ， 两车 还 相距 400 千米 ， 照 这样 计算 ， 两车 再行 多少 小时 才能 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "333", "content": "水果店 上午 运 来 15 筐 苹果 ， 下午 运 来 20 筐 ， 下午 比 上午 多 运 来 225 千克 ， 平均 每 筐 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1126", "content": "去年 小 王家 收入 28000 元 ， 今年 比 去年 增加 了 (1/7) ， 今年 比 去年 多 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4376", "content": "直尺 上 的 刻度 从 7 到 12 = 多少 厘米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1217", "content": "12 万 * 3 = 多少 万 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2785", "content": "战旗 学校 学生 参加 少年宫 活动 ， 参加 美术 小组 有 25 人 ， 比 参加 音乐 小组 的 人数 多 25% ， 参加 音乐 小组 的 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20898", "content": "一 列 火车 (3/5) 小时 行 了 45 千米 ， 照 这样 计算 ， 从 甲 城 到 乙 城 用 了 (4/3) 小时 ． 甲 、 乙 两城 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13030", "content": "某 酒类 销售商 打出 “ 买 5 送 一 ” 的 促销 广告 ， 一种 酒 每瓶 的 销售价 为 60 元 ， 一次 买 5 瓶 ， 每瓶 便宜 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1654", "content": "六年级 征订 《 小学生 作文选 》 和 《 小学生 学习 报 》 ， 每人 至少 订 一种 ， 全年 级 学生 的 (3/5) 订 了 《 小学生 作文选 》 ， (4/7) 订 了 《 学习 报 》 ， 这 两种 都 订 的 有 6 人 ， 订 《 小学生 作文选 》 的 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17884", "content": "一 个 平行四边形 的 面积 是 48 ㎡ ， 底 是 8 m ， 则 这个 底 上 的 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18087", "content": "五年级 有 男生 120 人 ， 比 女生 人数 多 25% ， 五年级 有 女生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11451", "content": "某 修路 队 10 天 修 了 一条 路 的 (1/6) ， 照 这样 这个 修路 队 修 完 这 条 路 还 需 多少 天 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1823", "content": "一 堆 货物 ， 第一天 运走 了 总数 的 (1/4) ， 第 二 天 运走 了 总数 的 (2/5) 还 剩 35 吨 ． 第一天 运走 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15690", "content": "一 个 车间 要 生产 2560 个 零件 ， 3 天 生产 了 960 个 ， 照 这样 计算 ， 剩下 的 零件 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1890", "content": "一 根 绳子 ， 第一次 用 去 (1/4) ， 第 二 次 用 去 (1/2) 米 ， 两次 共用 去 这根 绳子 的 (1/3) ， 这根 绳子 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4455", "content": "在 一条 河堤 的 一边 栽 了 75 棵 柳树 ． 每 两棵 柳树 中间 栽 一棵 芙蓉 树 ， 栽 芙蓉 树 多少 棵 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10855", "content": "李 刚 从 家 到 学校 ， 如果 每分钟 行 125 米 ， 需要 8 分钟 ， 如果 要 5 分钟 到 学校 ， 李 刚 每分钟 需要 行 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10828", "content": "甲 仓库 有 化肥 125 吨 ， 正好 比 乙 仓库 存 的 化肥 多 (1/4) ， 乙 仓库 存有 化肥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21979", "content": "妈妈 买 一件 标价 为 498 元 的 大衣 ， 参加 打 0.8 的 活动 ， 妈妈 付给 营业员 400 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5114", "content": "一 台 洗衣机 ， 原价 3000 元 ， 现在 降价 (2/15) ． 现在 售价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13014", "content": "学校 买 了 一些 图书 ， 其中 科技 书 有 84 本 ， 是 故事书 的 (2/3) ， 连环画 的 本 数 是 故事书 的 (8/7) ， 连环画 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19070", "content": "小 华 和小红 清理 储 钱 罐 ， 小 华 发现 给 小 红 2.5 元 后 两 人 的 钱 数 就 同样 多 了 ． 小 华 原来 比 小 红 多 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19285", "content": "运动会 上 315 个 同学 参加 体操 表演 ． 他们 平均 分成 7 个 队 ， 每队 平均 分成 5 组 ， 每组 有 多少 个 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22391", "content": "从 200 里 连续 减去 5 ， 减 多少 次 才 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12108", "content": "东北虎 360 千克 ， 是 大象 体重 的 4 倍 ， 大象 体重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17813", "content": "一 个 小数 是 2.4 ， 另 一个 小数 比 它 大 0.4 ， 另 一个 小数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16951", "content": "一 台 笔记本电脑 ， 每 台 卖 5795 元 ， 比 原来 每 台 优惠 5% ． 优惠 了 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7252", "content": "某校 六年级 有 700 人 ， 其中 男生 占 (3/5) ， 男生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9383", "content": "一 个数 的 (5/8) 是 (1/12) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16103", "content": "钱 红 和 顾 颖 用 计算机 同时 合 打 一份 1820 个 字 的 材料 ． 钱 红 每分钟 打字 120 个 ， 顾 颖 每分钟 打字 140 个 ． 她俩 打 完 这份 材料 ， 需用 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5698", "content": "把 (3/4) 米 长 的 绳子 平均 截 成 7 段 ， 每 段 是 全长 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13343", "content": "新世纪 超市 运 来 一批 蔬菜 ， 卖 初 (3/7) ， 还 剩 440 千克 ， 这 批 蔬菜 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20228", "content": "某 船 第一天 顺流 航行 21 千米 ， 逆流 航行 4 千米 ． 第 二 天 在 同一 河道 中 顺流 航行 12 千米 ， 逆流 航行 7 千米 ． 两次 所用 的 时间 相等 ． 假设 船 本身 速度 及 水流 速度 保持 不变 ， 顺水 船速 是 逆水 船速 的 多少倍 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16787", "content": "一 本 故事书 的 价钱 是 18.6 元 ， 一个 水杯 的 价钱 比 故事书 便宜 2.6 元 ， 买 一个 水杯 和 一本 故事书 一共 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1469", "content": "一 筐 香蕉 连 筐 重 42 千克 ， 卖出 (1/2) 后 ， 剩下 的 连 筐 重 29 千克 ． 筐 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5307", "content": "a ． b 两地 相距 1200 千米 ， 一辆 汽车 从 a 地 开往 b 地 ， 已 行 了 (3/4) ， 再行 多少 千米 正好 到达 b 地 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16092", "content": "一 件 商品 0.8 出售 ， 比 原价 便宜 了 84 元 ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17362", "content": "一 个 圆形 花坛 周围 栽 了 15 棵 柳树 ， 每 两棵 柳树 之间 有 一棵 杨树 ， 一共 有 树 多少 棵 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11594", "content": "修 一条 高速公路 ， 甲队 修 了 全长 的 55% ， 乙 队 修 了 全长 的 35% ， 甲队 比 乙 队 多 修 240 km ． 这 条 公路 全长 多少 km ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6131", "content": "张 叔叔 骑 自行车 上班 ， 0.5 小时 行 了 4 千米 ， 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22484", "content": "一 个数 的 4 倍 与 它 的 5.5 倍 的 和 是 1.9 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15476", "content": "计算 ： 3333 * 6666 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5282", "content": "兴 博 农业 示范区 菊花 的 种植 面积 是 30 公顷 ， 玫瑰 的 种植 面积 是 菊花 的 (5/6) ， 百合花 的 种植 面积 是 玫瑰 的 (4/5) ． 百合花 的 种植 面积 = 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20878", "content": "一 头羊 的 体重 是 75 千克 ， 一头 牛 的 体重 是 羊 的 9 倍 多 28 千克 ， 这 头牛 的 体重 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13801", "content": "小 新 家养 鹅 7 只 ， 养鸭 10 只 ． 养 鹅 的 只 数 是 鸭 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "943", "content": "甲 、 乙 两个 书架 ， 甲 书架 有 120 本书 ， 从 甲 书架 拿 24 本 到 乙 书架 ， 则 乙 书架 的 (2/3) 正好 是 甲 书架 的 75% ， 乙 书架 原来 有 多少 本书 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4822", "content": "水 结成 冰 体积 增加 (1/11) ， 2 立方分米 的 冰 化成 水 体积 = 多少 立方分米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21442", "content": "边长 是 4 分 米 的 正方形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6009", "content": "水果店 运 来 生 梨 240 千克 ， 运 来 的 苹果 比 生 梨 多 2 倍 少 60 千克 ， 水果店 运 来 苹果 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15899", "content": "计算 ： 12 + 102 + 21 + 201 + 202 + 2012 = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "15915", "content": "修 一条 水渠 ， 第一次 修 了 全长 的 (2/5) ， 第 二 次 修 了 全长 的 (1/3) ， 还 剩 800 米 没 修 ， 求 这 条 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10242", "content": "小 敏 看 一本 160 页 的 书 ， 第一天 看 了 总 页数 的 (1/4) ， 第 二 天 看 了 总 页数 的 60% ， 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16380", "content": "果园 里 有 苹果树 240 棵 ， 梨树 比 苹果树 少 (1/4) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3961", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 60 千米 ， 6 小时 到达 ， 返回 时 只用 5 小时 就 到达 甲地 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17689", "content": "13.5 * 8528.52 - 8.52 * 13513.5 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12819", "content": "校园 里 有 杨树 60 棵 ， 柳树 是 杨树 的 (9/10) ， 槐树 是 杨树 的 (2/3) ， 槐树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "913", "content": "一 根 竹竿 ， 从 一头 量 全长 的 (4/5) 作 一 记号 a ， 从 另一头 量 全长 的 (3/4) 作 一 记号 b ， 已知 ab 之间 的 距离 是 60 厘米 ， 这根 竹竿 的 长度 = 多少 厘米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5173", "content": "某 厂 4 月份 计划 生产 洗衣机 4000 台 ， 实际 生产 5000 台 ． 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14356", "content": "一 批 煤 480 吨 ， 用 去 (1/4) ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10457", "content": "王 叔叔 计划 每天 生产 48 个 零件 ， 由于 他 改进 技术 ， 3 天 就 完成 了 5 天 的 任务 ， 他 实际 每天 做 多少 个 零件 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5023", "content": "李 叔叔 开 货车 从 佛山 运货 到 东莞 用 了 3 小时 ， 货车 的 速度 是 40 千米 / 时 ， 返回 时 只用 了 2 小时 ， 李 叔叔 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7331", "content": "学校 买来 篮球 和 排球 各 26 个 ， 篮球 每个 72 元 ， 排球 每个 28 元 ， 学校 共 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22658", "content": "某 乡 计划 开荒 造林 40 公顷 ， 实际 比 计划 增加 了 6 公顷 ， 增加 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18355", "content": "筑路 队 修 一条 长 3000 米 的 混凝土 路 ， 一周 后 还 剩下 1800 米 没有 修 ， 已修 的 占 剩下 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7226", "content": "清华大学 附中 共有 学生 1800 名 ， 若 每个 学生 每天 要 上 8 节 课 ， 每位 教师 每天 要 上 4 节 课 ， 每节课 有 45 名 学生 和 l 位 教师 ， 据此 请 推算出 清华大学 附中 共有 教师 多少 名 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22139", "content": "农场 有 公鸡 286 只 ， 母鸡 357 只 ． 养 的 鸭 比 鸡 的 只 数 少 194 只 ． 农场 养鸭 多少 只 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2063", "content": "有 一批 种子 的 发芽率 为 98.5% ， 播种 下 3000 粒 种子 ， 可能 会 有 多少 粒 种子 没 发芽 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20862", "content": "一 个数 的 3 倍 是 243 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1939", "content": "实验 小学 四年级 原来 有 6 个 班 ， 平均 每班 80 人 ， 搬 到 新 教学楼 后 ， 平均 每班 人数 减少 20 人 ， 实验 小学 四年级 现在 有 几个 班 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22788", "content": "4 名 队员 参加 乒乓球 比赛 ， 如果 每 2 名 队员 之间 都 要 进行 一场 比赛 ， 一共 要 安排 多少 场 比赛 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2031", "content": "一 个 平行四边形 的 面积 是 33.6 平方厘米 ， 其 底边 长 是 8.4 厘米 ， 那么 它 的 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4998", "content": "小 丽 家 到 商场 的 距离 是 2400 米 ， 她 以 150 米 / 分 的 速度 跑 了 5 分钟 ， 又 以 60 米 / 分 的 速度 走 了 16 分钟 ， 还要 走 多少 米 才能 到 商场 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17468", "content": "一 幢 大楼 有 28 层 ， 每 层高 2.6 米 ， 这幢 大楼 高 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14654", "content": "一 台 洗衣机 的 价钱 是 608 元 ， 买 一台 冰箱 的 钱 正好 买 3 台 洗衣机 ， 一台 冰箱 的 价钱 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17732", "content": "6 （ 3 ） 班 某次 数学考试 平均分 是 86 分 ， 高于 平均分 记 作 正数 ， 低于 平均分 记 作 负数 ． 小利 的 成绩 记 作 - 5 分 ， 她 实际 得 多少 分 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21760", "content": "学校 要 为 图书室 新添 两种 “ 朝阳 读书 计划 ” 新书 ， 每种 4 套 ． 第一种 书 每套 158 元 ， 第 二 种 新书 每套 33 元 ． 一共 要 花 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8895", "content": "一 个 10 米 的 枯井 ， 井底 有 一只 青蛙 ， 它 白天 向 上爬 3 米 ， 到 夜里 往 下滑 2 米 ， 那么 什么 时候 青蛙 才能 爬 出 枯井 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19725", "content": "永 盛 电子元件 厂 加工 某种 电子零件 15000 个 ， 原 计划 30 天 完成 ， 实际 每天 比 原 计划 多 生产 250 个 ． 这样 可比 原 计划 提前 多少 天 完成 任务 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "117", "content": "4 头 奶牛 3 天 吃 草 72.6 千克 ， 平均 每 都 奶牛 每天 吃 草 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11455", "content": "粮店 的 面粉 每 袋 重 (1/40) 吨 ， 已经 卖出 (4/5) 吨 ， 卖出 了 多少 袋 面粉 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21180", "content": "一 个 果园 种 了 360 棵 梨树 ， 平均 每棵 梨树 收 梨 40 千克 ． 如果 每千克 售价 为 3.6 元 ， 一共 可以 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9845", "content": "多少 千克 比 35 千克 少 60% ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4125", "content": "一 种 收音机 去年 售价 是 150 元 ， 今年 比 去年 价格 降低 (1/5) ， 今年 每 台 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18408", "content": "一 只 足球 90 元 ， 篮球 价钱 是 足球 的 (2/5) ． 买 一只 足球 和 一只 篮球 一共 要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3587", "content": "小 红 看 一 本书 ， 第一天 看 了 全书 的 20% ， 第 二 天 看 了 剩下 的 40% ， 还有 96 页 没有 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4824", "content": "银州区 某 小学 开展 “ 心系 灾区 献爱心 “ 捐赠 活动 ． 六年级 捐赠 7200 元 ， 五年级 捐赠 的 是 六年级 的 (7/8) ， 两个 年级 捐 蹭 的 正好 是 全校师生 捐赠 总数 的 36% ． 全校师生 一共 捐赠 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10549", "content": "要 做 一个 无盖 的 长方体 铁皮 水箱 ， 从 内部 量 长 1.1 米 ， 宽 6 分 米 ， 高 9 分 米 ． 这个 水箱 的 容积 = ？ （ 不计 铁皮 的 厚度 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17985", "content": "学校 买来 一批 本 少儿 图书 ， 其中 (1/3) 分给 低年级 ， 低年级 分 得 了 120 本 ； 再 把 这 批 图书 的 (3/8) 分给 高年级 ， 高年级 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2690", "content": "红星 机床厂 去年 生产 机床 3200 台 ， 今年 计划 生产 3600 台 ， 今年 计划 比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9515", "content": "修 一条 水渠 ， 已经 修 了 (1/3) ， 剩下 18 千米 ， 这 条 水渠 有 多长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5268", "content": "3.4 减去 它 的 (1/4) 所得 的 差 ， 被 4.32 与 (17/25) 的 和 除 ， 商 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "452", "content": "把 一个 圆柱 的 侧面 展开 ， 是 一个 边长 9.42 cm 的 正方形 ， 这个 圆柱 的 底面 直径 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15796", "content": "甲 、 乙 两个 车间 同时 生产 一批 零件 ， 当 甲 车间 完成 240 个 零件 时 ， 乙 车间 已经 完成 的 零件 比 甲 车间 的 1.2 倍 少 18 个 ． 这时 乙 车间 完成 了 多少 个 零件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3122", "content": "读 一本 故事书 ， 第一天 读 了 全书 的 (1/5) ， 第 二 天 比 第一天 多 读 6 页 ， 这时 已 读 的 页数 与 剩下 页数 的 比 是 9 ： 11 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6027", "content": "甲乙 两城 相距 780 千米 ， 一辆 客车 和 一辆 货车 分别 从 两地 相对 开出 ， 客车 每 时 行 100 千米 ， 货车 每 时 行 80 千米 ． 客车 出发 1.5 时 后 货车 才 出发 ， 货车 从 出发 到 两车 相遇 行 了 几时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8678", "content": "7 + 11 + 15 + 19 + 23 + 27 + 31 + 35 + 39 = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "9083", "content": "新华书店 运 来 一批 图书 ， 第一天 卖出 这 批 图书 的 32% ， 第 二 天 卖出 这 批 图书 的 45% ， 已知 第一天 卖出 640 本 ， 两天 一共 卖出 多少 本 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4766", "content": "水果店 运 来 120 千克 梨 ， 苹果 的 重量 是 梨 的 (5/8) ， 橘子 的 重量 是 苹果 的 (4/5) ， 橘子 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2414", "content": "一 列 火车 从 上海 开往 汉口 ， 已经 行 了 (3/5) ， 离 汉口 还有 400 千米 ． 上海 到 汉口 的 铁路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12492", "content": "一 本 故事书 共有 120 页 ， 小 华 看 了 (3/5) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16754", "content": "甲 居委会 为 灾区 捐 棉衣 240 件 ， 比 乙 居委会 多 捐 了 20% ， 比 乙 居委会 多 捐 棉衣 多少 件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15764", "content": "今年 我市 农村 人均收入 2700 元 ， 比 去年 增加 (2/25) ． 去年 农村 人均收入 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21494", "content": "从 3 里面 减去 (6/7) 与 (3/4) 的 和 ， 差 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13666", "content": "四年级 原有 42 人 ， 男生 占 (4/7) ， 后来 转 来 若干 多 女生 后 ， 男女 人数 比 是 6 ： 5 ， 现在 全班 有 多少 名 学生 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1171", "content": "农场 今年 收获 粮食 270 吨 ， 比 去年 增产 了 (2/7) ， 去年 收获 粮食 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6358", "content": "运动场 ， 两端 相距 300 米 ， 甲乙 两个 同学 各 从 运动场 一端 向 相反 方向 走 去 ． 7 分钟 后 ， 两 人 相距 860 米 ， 甲 同学 每分钟 走 37 米 ， 乙 同学 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11494", "content": "五年级 同学 收集 了 162 个 易拉罐 ， 比 六年级 同学 少 收集 (2/11) ． 六年级 同学 收集 了 多少 个 易拉罐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15609", "content": "某 商店 委托 李师傅 运送 400 个 瓷碗 ， 每个 碗 运费 0.12 元 ， 如果 每 破损 1 个 碗 ， 不但 不 给 运费 ， 还要 赔偿 1.08 元 ， 最后 结帐 ， 李师傅 共 得 运费 45.6 元 ， 问 李师傅 在 运送 过程 中 破损 了 几个 碗 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15737", "content": "田 田 给 妈妈 打 了 一个 电话 ， 花 了 1.2 元 钱 ． 电信局 规定 ： 市内电话 前 3 分钟 付费 0.2 元 ， 以后 每分钟 0.1 元 ． 田 田 和 妈妈 通话 多长时间 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19807", "content": "一 包 茶叶 重 600 克 ， 用 去 (3/5) ， 还 剩 多少 克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12898", "content": "工程队 检修 一条 铁路 ， 甲队 从 它 的 北端 开始 ， 每天 检修 23 km ， 甲队 开工 1 天 以后 ， 乙 队 从 它 的 南端 开始 ， 每天 检修 47 km ， 两队 合 修 8 天 以 才 刚好 修 完 这 条 路 ， 这 条 路 长 多少 km ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1805", "content": "4 * 0.75 的 积 减去 1.5 ， 再 除以 0.5 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5802", "content": "用 3 辆 同样 的 卡车 去 运 162 吨 苹果 ， 每辆 卡车 每次 运 6 吨 ． 这些 卡车 需要 多少 次 才能 把 苹果 全部 运走 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18909", "content": "乐乐 饰品厂 制作 “ 海底 总动员 ” 系列 的 小 挂件 ， 上午 赶制 了 338 套 ， 下午 赶制 了 650 套 ， 把 这些 饰品 平均 分给 52 个 大型超市 ． 每个 超市 分 得 多少 套 小 挂件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1634", "content": "兰兰 和 娜娜 两 人 在 上 体育课 时 踢毽子 ， 兰兰 踢 了 113 下 ， 比 娜娜 多 踢 了 28 下 ， 两 人 一共 踢 了 多少 下 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21381", "content": "王 阿姨 买 11 个 暖瓶 ， 付 了 200 元 ， 找回 35 元 ， 每个 暖瓶 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6261", "content": "甲 数 是 18 ， 乙 数 比 甲 数 的 2 倍 少 5 ， 乙 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14872", "content": "实验 小学 三年级 学生 视力 测试 中 达标 120 人 ， 占 全年 级 人数 的 96% ， 全年 级 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "496", "content": "实验 小学 参加 艺术 班 的 学生 有 1080 人 ， 占 全校学生 总数 的 (2/5) ， 全校 共有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2304", "content": "李 阿姨 带 了 500 元 去 买 鱼 ， 买 了 25 千克 ， 还 剩下 50 元 ． 鱼 的 单价 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13202", "content": "男生 人数 比 女生 多 (1/4) ， 那么 男生 人数 是 女生 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4274", "content": "有 一段 木料 ， 如果 把 它 锯 成 每 段 0.8 米 长 的 短 木料 ， 需要 锯 9 次 ． 现在 要 把 它 锯 成 每 段 0.4 米 长 的 短 木料 ， 需要 锯 几次 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6090", "content": "一 个 最 简分数 ， 它 的 分子 除以 2 ， 分母 乘 3 ， 化简 后 得 (3/29) ， 这个 最 简分数 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1881", "content": "一 位 登山 运动员 以 每 小时 6 千米 的 速度 从 山脚 登上 山顶 ， 又 以 每 小时 4 千米 的 速度 立即 从 山顶 按 原 路 返回 山脚 ． 在 一个 上下 的 过程 内 平均速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "939", "content": "王老师 将 20000 元 钱 存入 银行 ， 定期 3 年 ， 3 年期 的 利率 是 5.40% ， 利息税 是 5% ． 到期 后 ， 王老师 可 取回 税后 利息 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4224", "content": "铺设 一条 长 6300 米 的 下水道 ， 由 甲乙 两个 小组 从 两头 同时 开始 施工 ， 经过 60 天 后 还 剩 300 米 ． 甲组 每天 完成 54 米 ， 乙组 每天 完成 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "183", "content": "张师傅 6 小时 做 了 138 个 零件 ， 李师傅 8 小时 做 了 160 个 零件 ， 张师傅 比 李师傅 平均 每 小时 多 做 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4300", "content": "6 个 小朋友 参加 一 次 聚会 ， 每 2 位 小朋友 都 要 握 一次 手 ， 一共 要 握 多少 次 手 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1054", "content": "三年级 有 男生 267 人 ， 女生 233 人 ， 已经 参观 过 博物馆 的 有 398 人 ， 还 没有 参观 过 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18889", "content": "甲 数 是 (1/3) ， 比 乙 数多 (1/15) ， 甲 、 乙 两 数 的 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14351", "content": "一 部 语言 复读机 原价 298 元 ， 打 0.85 销售 ， 比 原价 降价 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22878", "content": "西门 小学 准备 买 25 盒 笔 奖励 优秀学生 ， 每盒 里面 有 12 支 笔 ， 每支 笔 4 元 ， 共 需 花费 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20029", "content": "123 * 5.67 + 8.77 * 567 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18682", "content": "一 班 栽 了 50 棵 树 ， 是 二 班 栽 的 (5/7) ， 两个 班 一共 栽 了 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21060", "content": "一 只 蛤蟆 掉 在 井 里 ， 井 深 18 米 ， 它 白天 爬 3 米 ， 夜里 滑 下 2 米 ， 爬 到 井口 要 用 多少 天 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8445", "content": "小 丽 看 一本 529 页 的 书 ， 看 了 4 天 还 剩 25 页 没 看 ， 平均 每天 看 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8466", "content": "“ 靓丽 ” 影楼 这个 月 按 营业额 的 15% 交纳 营业 税款 3 万元 ． 影楼 本月 的 营业额 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6891", "content": "假日 ， 遥遥 一家 骑车去 郊游 ， 去 时 每 小时 15 千米 ， 返回 时 每 小时 10 千米 ， 他们 往返 的 平均速度 是 每 小时 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9896", "content": "一 个 篮球 96 元 ， 李老师 用 1000 元 钱 买 了 8 个 篮球 ． 还 剩 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4366", "content": "芳 芳 有 一些 邮票 ， 用 去 18 张 ， 还 剩 6 张 ， 原来 有 多少 张 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7035", "content": "5 （ 1 ） 班 为 布置 教室 购买 绿 彩带 18 米 ， 购买 的 红 彩带 长度 是 绿 彩带 的 (2/3) ， 又 是 黄 彩带 的 (1/2) ． 购进 黄 彩带 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "638", "content": "工程队 修 一条 水渠 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 全长 的 30% ， 还 剩下 900 米 没 修 ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5856", "content": "小 红 看 一 本书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (3/8) ， 这时 还 剩 51 页 没 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16324", "content": "工程队 6 天 完成 一项 工程 的 (2/5) ， 照 这样 计算 ， 完成 全部 工程 要 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21423", "content": "某 的 (2/3) 比 一个 数 的 70% 少 100 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11101", "content": "今年 妈妈 36 岁 ， 小 明 12 岁 ． 小 明 年龄 是 妈妈 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12279", "content": "肥城 化肥厂 在 一 星期 的 前 3 天 共 节约 用 煤 8.4 吨 ， 后 4 天 节约 用 煤 14.7 吨 ， 这样 实际 用 煤 170 吨 ， 化肥厂 这 一 星期 平均 每天 节约 用 煤 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1619", "content": "一 种 超级 dvd 影碟机 ， 商店 将 进价 加 40% 定价 ． 然后 按 定价 的 90% 出售 ， 并且 每 台 送 “ 的士 ” 费 50 元 ， 这样 每 台 仍 可以 获 利润 （ 赚 ） 262 元 ， 求 这种 影碟机 每 台 的 进价 = 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6101", "content": "建筑工地 要 运 360 吨 沙 ， 已 运 来 (5/18) ， 还要 再 运 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11587", "content": "完成 同 一件 工作 ， 甲 用 5 小时 ， 乙 用 4 小时 ， 乙 用 的 时间 比 甲 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14753", "content": "水果 批发市场 送来 的 苹果 和 西瓜 的 重量 比 是 5 ： 8 ， 西瓜 比 苹果 多 (6/7) 吨 ， 两种 水果 一共 有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22375", "content": "李 阿姨 在 上午 做 了 36 个 玩具 ， 下午 又 做 了 54 个 玩具 ， 现在 每 6 个 玩具 可 装 一箱 ， 这些 玩具 共 可 装 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "585", "content": "一 组 同学 搬 一堆 砖 ， 每人 搬 8 块 ， 还 剩 14 块 ， 每人 搬 9 块 ， 最后 一 人 只 搬 6 块 ， 问 这 组 共有 多少 同学 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1060", "content": "差 和 减数 都 是 500 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13713", "content": "一 篇文章 有 30 行 ， 每行 20 个 字 ， 玲玲 花 了 10 分钟 打 完 了 这 篇文章 ， 她 平均 每分钟 打 几个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2563", "content": "一 台 饮水机 价格 是 105 元 ， 一台 微波炉 的 价钱 是 饮水机 的 5 倍 ， 王 叔叔 买 一台 饮水机 和 一台 微波炉 一共 要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "886", "content": "工地 上 原有 一批 黄沙 ， 用 去 (1/3) 后 ， 又 运进 3 吨 ， 这时 的 黄沙 正好 占 原有 黄沙 的 80% ， 工地 原有 黄沙 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18205", "content": "为 庆祝 “ 国庆节 ” ， 六3 班 要 做 240 面 小旗 ， 已经 做 了 (5/6) ， 做 了 多少 面 小旗 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19127", "content": "李 刚 看 一本 故事书 ， 已 看 的 页数 与 剩下 页数 比 是 2 ： 3 ， 已 看 的 页数 恰好 比 全书 的 (3/4) 少 14 页 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21321", "content": "广州 恒 大 足球 俱乐部 星期 二 上午 售出 344 张 亚 冠 联赛 决赛 （ 次 回合 ） 的 门票 ， 下午 售出 187 张 ； 星期 3 售出 413 张 ． 这 两天 广州 恒 大 足球 俱乐部 一共 售出 多少 张 门票 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6451", "content": "从 248 里 连续 减去 8 ， 最 多 能 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2388", "content": "一 根 木料 长 24 分 米 ， 要 锯 成 4 分 米 长 的 料子 ， 需要 锯 几次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12178", "content": "一 个 排球 35 元 ， 一个 足球 32 元 ， 李老师 买 5 个 排球 和 2 个 足球 共 付 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9830", "content": "王 叔叔 将 一头 生猪 以 每千克 9 元 的 价格 卖 给 肉 商 ， 生猪 重 109 千克 ， 肉 商 应付 给 王 叔叔 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7466", "content": "一 种 钢轨 ， 4 根 共 重 1900 千克 ， 现在 有 95000 千克 钢 ， 可以 制造 这种 钢轨 多少 根 ． （ 损耗 忽略不计 ）", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19968", "content": "用 30 + 25 个 (4/5) 所得 的 和 去除 (9/10) ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13675", "content": "一 条 公路 ， 已修 了 40% ， 还 剩下 42 千米 没有 修 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19766", "content": "张老师 买来 了 4 盒 水笔 ， 每盒 12 支 ， 每支 水笔 5 元 ． 张老师 共 要 付 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3417", "content": "3.1416 * 2.7183 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16262", "content": "两 人 从 相距 171 千米 的 两地 同时 出发 ， 甲 骑 自行车 每 小时 行 15 千米 ， 乙 乘 汽车 每 小时 行 42 千米 ， 两 人 几小时 可以 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21819", "content": "司机 王 叔叔 从 厦门 出发 到 福州 送货 ， 前 3 小时 的 速度 是 70 千米 / 小时 ， 后 2 小时 的 速度 是 60 千米 / 小时 ， 王 叔叔 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17488", "content": "某区 100 名 外语 教师 中 ， 懂 英语 的 75 人 ， 懂 日语 的 45 人 ， 其中 有 的 教师 既 懂 英语 又 懂 日语 ， 那么 只 懂 英语 的 教师 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3322", "content": "比 20 千克 多 5% = 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7848", "content": "一 段 公路 两周 修好 ， 第一周 修 了 全长 的 45% ， 比 第 二 周 少 修 80 米 ， 这 段 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13243", "content": "两辆 汽车 从 相距 500 千米 的 两城 同时 出发 ， 相向 而 行 ． 一辆 摩托车 以 每 小时 80 千米 的 速度 在 两辆 汽车 之间 不断 往返 联络 ． 已知 这 两辆 汽车 的 速度 分别 是 每 小时 40 千米 和 60 千米 ， 求 两 汽车 相遇 时 ， 摩托车 共 行驶 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5418", "content": "王 芳 身高 1.30 米 ， 爸爸 比 她 高 0.54 米 ， 爸爸 的 身高 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "415", "content": "梨 每千克 3.65 元 钱 ， 妈妈 买 了 13 千克 梨 要 付 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9943", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 每 小时 行 60 千米 ， 8 小时 到达 ， 回来 时 每 小时 多行 20 千米 ， 请问 几小时 可以 返回 甲地 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18248", "content": "一 个 棱 长 是 12 厘米 的 正方体 鱼缸 ， 里面 装满水 ， 把 水 倒入 一个 长 18 厘米 、 宽 10 厘米 的 长方体 鱼缸 里 ， 水 有多深 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8382", "content": "在 一条 长 48 米 的 马路 一旁 每隔 6 米 栽 一棵 杨树 ， 两头 都 栽 ， 可以 栽 多少 棵 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20829", "content": "体育用品 加工厂 加工 了 一批 羽毛球 ， 每 12 个 装 一 筒 ， 每 5 筒 装 一盒 ， 一共 40 盒 ， 体育用品 加工厂 加工 了 多少 个 羽毛球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16294", "content": "一 个数 的 20% 是 100 ， 这个 数 的 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21230", "content": "一 个 随身听 原价 是 120 元 ， 按 0.75 出售 ， 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17881", "content": "商店 有 黄 气球 65 个 ， 红 气球 56 个 ， 花 气球 的 个数 比 黄 气球 和 红 气球 的 总数 少 25 个 ， 花 气球 有 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11831", "content": "有 若干名 小学生 围成 一个 圆圈 ， 从 某 一个 学生 按 1 、 2 、 3 … 开始 报数 ， 若 按 顺时针 方向 ， 那么 报 到 小 美 时 ， 她 应该 报 “ 15 ” ； 若 按 逆时针 方向 ， 小 美 应 报 “ 7 ” ． 那么 ， 这 群 小学生 一共 有 多少 名 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3394", "content": "一 个 工厂 一批 零件 ， 有 483 个 合格 ， 不 合格 的 零件 占 总数 的 30% ， 这 批 零件 有 多少 个 不 合格 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22253", "content": "四川 抗震救灾 部署 计划 在 震后 30 天 内 搭建 简易房 24000 间 ， 实际 前 4 天 就 完成 了 任务 的 20% ， 这样 可以 提前 多少 天 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18284", "content": "一 比例 中 ， 两 外 项 的 乘积 为 1 ， 其中 一个 内 项 为 0.2 ， 另 一个 内 项 为 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9921", "content": "幼儿园 买来 8 盒 皮球 ， 分给 小朋友 72 个 ， 还 剩 24 个 ． 平均 每盒 有 多少 个 皮球 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10629", "content": "小 明 从 “ 空中课堂 ” 的 网页 上 下载 了 30 首 古诗 ， 小 红 下载 的 古诗 比 小 明 的 (2/3) 多 3 首 ， 小 红 下载 多少 首 古诗 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21885", "content": "同学 们 采集 种子 ， 女同学 采集 了 15 千克 ， 男同学 采集 的 质量 比 女同学 的 6 倍 多 8 千克 ， 男同学 采集 了 种子 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14483", "content": "红星 小学 四年级 同学 植树 45 棵 ， 五年级 同学 植树 的 棵 树 比 四年级 的 2 倍 少 18 棵 ， 五年级 同学 植树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3664", "content": "某 煤矿 去 年产 煤 2100 万吨 ， 比 去年 少 30% ， 今年 产 煤 多少 万吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8058", "content": "把 105 棵 松树 种 在 一条 长 1040 米 的 水渠 一侧 （ 两端 都 种 ） ， 每 相邻 两棵树 之间 的 距离 = 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4057", "content": "一 个 长方形 ， 长 (12/5) 米 ， 比 宽 多 (3/4) 米 ， 宽 = 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13591", "content": "一 件 商品 打 0.8 后 售价 400 元 ， 这件 商品 比 原价 便宜 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3230", "content": "一 种 商品 原价 150 元 ， 0.75 出售 ， 现在 售价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13431", "content": "一 个数 加上 (2/5) 再 减去 (5/6) 结果 是 (11/15) ， 求 这个 数 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21984", "content": "妈妈 带 了 170 元 钱 去 超市 买 东西 ． 买 食品 用 去 35.20 元 ， 买 日用品 用 去 11.30 元 ， 妈妈 还 剩下 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17594", "content": "一 桶 柴油 ， 第一次 取出 总数 的 (2/5) ， 第 二 取出 余下 的 (3/4) ， 还 剩 12 千克 ， 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5251", "content": "余 蕾 骑车 从 学校 去 图书城 ， 已知 她 骑车 每分钟 行 210 米 ， 她 骑 了 24 分钟 ， 距 图书城 还有 120 米 ． 从 学校 到 图书城 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14415", "content": "计算 ： 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 30 + 31 = ．", "knowledge": ["+"], "difficulty": 1.0, "length": 23}
-{"question_id": "19923", "content": "一 台 电视机 ， 原价 3800 元 ， 现 降价 (1/5) ， 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6031", "content": "60.5 增加 3 倍 后 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5928", "content": "印刷厂 5 小时 印书 9540 本 ， 照 这样 计算 ， 再 印刷 3 小时 一共 可印刷 多少 本 ？ 共 要 缴 水费 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1265", "content": "小 明 读 一 本书 ， 已经 读 了 全书 的 55% ， 比 没 读 的 多 10 页 ， 这 本书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11235", "content": "一 个数 减 24 + 15 ， 再 乘以 8 得 432 ， 求 这个 数 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16056", "content": "一 条 裤子 85 元 ， 一件 上衣 比 裤子 贵 98 元 ， 买 这样 的 一件 上衣 和 裤子 共 需 多少 元 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13898", "content": "一 个数 的 (1/5) 比 它 的 (5/8) 少 15 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5765", "content": "一 本书 打 0.8 后 的 售价 是 18.4 元 ， 这 本书 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5576", "content": "一 辆 汽车 在 高速公路 上 行驶 的 速度 是 每 小时 120 千米 ， 是 在 普通 公路 上 行驶 速度 的 2 倍 ． 这辆 汽车 在 普通 公路 上 行驶 的 速度 是 每 小时 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16849", "content": "4.15 与 0.75 的 和 的 2 倍 去除 4.9 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6666", "content": "一 本书 ， 第一天 看 了 20 页 ， 第 二 天 看 了 (1/4) ， 两天 共 看 了 45 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11823", "content": "一 种 毛线 每千克 的 价格 是 66.5 元 ， 小 明 的 妈妈 买 了 0.8 千克 ， 付给 营业员 100 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2663", "content": "两辆车 同时 从 两城 相向 而 行 ， 甲 车 每 小时 行 50 千米 ， 乙 车 每 小时 行 65 千米 ， 5 小时 后 两车 相距 140 千米 （ 未 相遇 ） ， 甲乙 两城 相距 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22785", "content": "比 70 米 多 20% = 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20493", "content": "商店 运 来 黄瓜 3600 千克 ， 运 来 的 西红柿 比 黄瓜 多 10% ， 比 豆角 少 40% ， 运 来 豆角 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13564", "content": "商店 买 回 大米 和 面粉 共 15 千克 ， 大米 占 (3/4) ， 后来 又 买 了 一些 面粉 ， 这时 大米 占 总重量 的 (1/2) ． 后来 买 回 的 面粉 = 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1455", "content": "甲乙 两车 同时 从 相距 588 米 的 两地 同时 相对 开出 ， 当 两车 相距 210 千米 时 ， 正好 用 了 4 小时 ， 已知 乙 车 速度 为 45 千米 每 小时 ， 求 甲 车 的 速度 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10349", "content": "某 仓库 有 货物 148 吨 ， 已经 运 了 4 次 ， 平均 每次 运走 14.5 吨 ， 剩下 的 货物 要 6 次 运 完 ， 平均 每次 应运 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6352", "content": "若 6 （ 2 ） 班 某 小组 10 名 同学 在 一次 数学 测验 中 的 平均 成绩 是 85 分 ， 则 调进 一位 成绩 是 96 分 的 同学 后 的 平均分 = 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12351", "content": "小 亮 买 铅笔 比 买 笔记本 少 花 1.8 元 ． 买 了 10 支 铅笔 ， 每支 铅笔 0.5 元 ， 买 了 4 本 笔记本 ， 每 本 笔记本 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19345", "content": "某村 修 一条 长 (4/5) 千米 的 水渠 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 全长 的 (3/10) ， 还 剩 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21792", "content": "食品厂 运出 4 车 面粉 ， 每 车 装 108 袋 ， 每 袋 面粉 重 25 千克 ， 一共 运出 面粉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3414", "content": "比 一个 数 的 5 倍 少 30 的 数 是 470 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6049", "content": "“ 6 一 ” 儿童节 ， 李 阿姨 买 业 3 块 蛋糕 平均 分给 4 个 孩子 ， 每个 孩子 分 得 多少 块 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19871", "content": "图书馆 运 来 一批 新书 ， 故事书 有 420 本 ， 科技 书 是 故事书 的 12 倍 ， 故事书 和 科技 书 一共 运 来 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1693", "content": "妈妈 买 了 2 千克 香蕉 和 3 千克 苹果 ， 共 花 去 11.4 元 ， 每千克 苹果 2.8 元 ， 每千克 香蕉 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7656", "content": "小 东 从 甲地 到 乙地 ， 当 行驶 到 全程 的 (5/8) 时 ， 离 乙地 还有 240 米 ． 甲 、 乙 两地 相距 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10634", "content": "918 是 54 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5665", "content": "菜市场 运 来 一批 新鲜 蔬菜 ， 其中 萝卜 占 20% ， 青菜 占 35% ， 已知 青菜 比 萝卜 多 450 千克 ， 这 批 蔬菜 共 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1770", "content": "为 美化环境 ， 学校 绿化 小组 今年 植树 36 棵 ， 比 去年 的 (7/8) 还 多 15 棵 ， 去年 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20742", "content": "有 4 只 小 猴 一共 摘 了 64 个 桃 ， 一个筐 装 了 28 个 ， 其余 的 放在 3 个 篮子 里 ， 平均 每个 篮子 里 放 多少 个 桃 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1706", "content": "修路 队 修 一条 公路 ， 已经 修 了 156 米 ， 是 剩下 的 3 倍 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12890", "content": "六年级 有 学生 216 人 ， 其中 男生 占 (5/9) ， 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19161", "content": "学校 买来 54 本 新书 ， 其中 科技 书 占 (1/6) ， 文艺 书 占 (1/2) ， 文艺 书 比 科技 书 多 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12340", "content": "红旗 小学 有 男生 440 人 ， 是 女生 人数 的 (11/12) ． 全校 一共 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14690", "content": "某 印刷厂 原 计划 十 月份 装订 练习本 18 万 本 ， 上旬 完成 计划 的 (1/4) ， 中旬 与 下旬 都 完成 计划 的 40% ， 这个 月 超额完成 多少 万 本 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22857", "content": "妈妈 用 20 元 钱 买 了 2 千克 西红柿 ， 找回 的 钱 正好 买 3 千克 黄瓜 ， 黄瓜 每千克 4.8 元 ， 西红柿 每千克 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6506", "content": "在 校运会 中 ， 运动员 需要 720 张 的 号码 布 ， 保管室 里 已经 有 (5/6) 的 号码 布 ， 还要 定做 多少 张 号码 布 才 够用 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21716", "content": "某 公司 要 生产 一批 手提电脑 ， 原 计划 每天 生产 40 台 ， 10 天 完成 任务 ． 实际 每天 生产 了 50 台 ， 实际 所用 的 时间 是 原 计划 的 百分之几 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21927", "content": "甲 数 的 (1/5) 与 乙 数 的 (1/6) 相等 ， 乙 数 是 10 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6415", "content": "把 一堆 大米 运往 灾区 ， 运 了 6 车 才 运走 (3/5) ， 余下 的 大米 还要 运 多少 车 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1406", "content": "小 丽 有 12 枝 笔 ， 小 红 的 是 小 丽 的 (3/4) ． 小花 的 比 她俩 的 总数 少 5 枝 ， 小花 有 多少 枝 笔 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5230", "content": "超市 促销 ， 一盏 台灯 打 0.8 后 售价 72 元 ， 这 盏 台灯 的 原价 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21964", "content": "小 兰 有 2 条 花色 不同 的 裤子 ， 3 件 颜色 不同 的 上衣 ． 她 一共 有 多少 种 不同 的 搭配 穿 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14834", "content": "6 （ 1 ） 班 男生 与 女生 的 人数 的 比 是 5 ： 8 ， 男生 有 25 人 ， 女生 有 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3326", "content": "机床厂 第一季度 生产 机床 570 台 ， 比 计划 多 生产 90 台 ， 超额完成 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6646", "content": "被减数 和 减数 的 比 是 3 ： 1 ， 减数 是 6 ， 被减数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13305", "content": "李老师 买 2 千克 苹果 ， 付出 15 元 ， 找回 1.8 元 ， 买 苹果花 了 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15714", "content": "李 明 5 分 的 时间 走 350 米 ， 他家 离 学校 910 米 ， 照 这样 的 速度 ， 他 从 家 到 学校 要 走 多少 分 ？ （ 列 综合 算式 ）", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17575", "content": "某班 一次 考试 的 平均数 是 76 分 ， 其中 80% 的 人 及格 ， 他们 的 平均分 是 80 分 ， 求 不及格 的 人 的 平均分 = 多少 分 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19148", "content": "张 阿姨 将 一本 60 页 的 书 录入 电脑 ， 3 小时 录入 了 这 本书 的 (2/3) ， 已 录入 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11754", "content": "某 公司 预算 一天 的 开支 为 5600 元 ， 实际 比 预算 节省 了 (3/14) ， 该 公司 每天 的 实际 开支 为 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14513", "content": "一 个数 的 (1/4) 是 (2/3) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12121", "content": "特快 列车 1 小时 约 行 160 千米 ， 6 小时 可行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5994", "content": "小 明 看 完 一本 故事书 ， 前 5 天 每天 看 20 页 ， 后 2 天 每天 30 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20702", "content": "某 化肥厂 去 年产 的 化肥 是 2500 吨 ， 今年 比 去年 增产 20% ． 今年 增产 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15147", "content": "学校 在 一条 44 米 长 的 走廊 里 ， 每隔 4 米 放 一 盆花 ， 如果 两端 都 放 花 ， 要 放 多少 盆花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15483", "content": "小 宏 每分钟 走 68 米 ， 小 方 每分钟 走 72 米 ． 15 分钟 后 ， 小 方 比 小 宏 多 走 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20896", "content": "7 个 165 的 和 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16141", "content": "水果 超市 运 来 苹果 95 千克 ， 运 来 的 苹果 比 运 来 的 梨 的 2 倍 少 25 千克 ． 水果 超市 运 来 梨 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15244", "content": "甲 数 是 20 ， 乙 数 是 15 ， 乙 数 比 甲 数 少 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4984", "content": "一 堆 货物 3 天 运走 (1/3) ， 照 这样 计算 ， 剩下 的 还 需 多少 天运 完 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2041", "content": "甲 仓库 存有 计算机 150 台 ， 乙 仓库 存有 计算机 的 台数 比 甲 仓库 的 1.4 倍 少 15 台 ． 甲乙 两 仓库 一 共存 有 计算机 多少 台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11904", "content": "某班 男生 人数 的 (3/4) 等于 女生 人数 的 (2/3) ， 已知 女生 比 男生 多 3 人 ， 则 女生 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19797", "content": "开学 了 学校 转 进 10 名 学生 ， 总务处 李 主任 去 买 了 11 套 课桌椅 ， 椅子 每 把 30 元 ， 桌子 每张 价格 是 椅子 的 2 倍 ， 李 主任 买 桌椅 一共 要 付 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15054", "content": "希望 小学 新 挖 一个 长方体 的 沙坑 ， 长 4 米 ， 宽 3 米 ， 深 0.4 米 ， 需要 多少 立方米 的 黄沙 才能 填满 ？ 如果 每 立方米 黄沙 重 1.5 吨 ， 那么 这些 黄沙 重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "13618", "content": "甲乙 两地 相距 160 千米 ， 一辆 汽车 从 甲地 去 乙地 ， (3/4) 小时 行 了 60 千米 ， 照 这样 的 速度 ， 行 完全 程 要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3022", "content": "一 堆 货物 重 128 吨 ， 用 载重 4.5 吨 的 卡车 运 了 20 车 后 ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11965", "content": "某 工厂 有 女职工 1008 人 ， 占 全厂 职工 总数 的 (6/11) ， 全厂 职工 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17518", "content": "王大妈 养 了 48 只 鸡 ， 准备 平均 卖 给 8 客人 ． 每个 客人 可 买 到 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18395", "content": "展览馆 有 动物 标本 45 件 ． 植物 标本 的 件数 比 动物 标本 多 (1/5) ， 矿石 标本 的 件数 是 植物 标本 的 (7/9) ． 矿石 标本 有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1056", "content": "新学期 飞鱼 牌 英文 打字机 ， 按 原价 的 0.9 出售 ， 售价 是 369 元 ， 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5625", "content": "晓 刚读 一本 小说 ， 每天 读 总 页数 的 (1/9) ， 读 了 5 天 后 还 剩 48 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11825", "content": "修建 一座 教学大楼 ， 原 计划 投资 200 万元 ， 改进 方案 后 实际 投资 180 万元 ， 比 原 计划 节省 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20764", "content": "学校 有 故事书 684 本 ， 科技 书 247 本 ， 两种 书 学生 共 借 走 了 344 本 ， 还 剩下 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4024", "content": "一 种 电视 ， 电视 现在 售价 450 元 ， 比 原来 便宜 10% ， 比 原来 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5406", "content": "第一 小组 6 个 同学 数学 测验 的 成绩 分别 是 ： 86 、 79 、 98 、 100 、 89 、 94 ， 算 一 算 他们 的 平均分 = ？", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "5869", "content": "一 颗 人造卫星 绕 地球 5 周 需 (40/3) 小时 ． 用 同样 的 速度 绕 地球 12 周 需 多少 小时 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21866", "content": "将 一杯 水 喝掉 (5/6) ， 还 剩 这 杯水 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20598", "content": "6 （ 1 ） 班 有 学生 45 人 ， 比 六年级 学生 人 数据 的 (8/15) 多 5 人 ． 六年级 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11105", "content": "赵师傅 每天 要 工作 8 小时 ． 他 以前 每 小时 加工 零件 63 个 ， 技术革新 后 ， 以前 每天 的 工作量 现在 7 小时 就 可以 完成 ． 现在 赵师傅 每天 可以 加工 零件 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13605", "content": "2 个 红球 和 3 个 黄 球 放在 一个 布袋 里 ， 让 你 任意 摸 1 个 ， 这样 摸 10000 次 ， 摸 出 红球 的 次数 大约 占 总 次数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12540", "content": "9 * 125 * 127127 - 127 * 125125 = ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "19365", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 60 千米 ， 4 小时 到达 乙地 ， 返回 时 ， 每 小时 比 原来 快 20 千米 ， 返回 时 几小时 到达 甲地 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1238", "content": "一 辆 卡车 每次 运货 (7/2) 吨 ， 4 次 运 了 一批 货物 的 (1/3) ． 这 批 货物 一共 有 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1713", "content": "某 工厂 有 480 人 ， 其中 女工 占 (5/8) ， 后来 又 调进 若干 女工 ， 这 是 女工 占 现有 工厂 总 人数 的 (3/4) ， 后来 调入 女工 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19810", "content": "书法 组 共 50 人 ， 男生 一共 写 了 285 个 字 ， 女生 比 男生 多 写 了 130 个 字 ． 书法 组 平均 每人 写 多少 个 字 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22526", "content": "一 件 上衣 90 元 ， 是 裤子 价钱 的 (1/2) ， 一套 衣服 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1628", "content": "从 一个 边长 是 4 cm 的 正方形 里 剪下 一个 最大 的 圆 ， 剩下 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.4, "length": 11}
-{"question_id": "11179", "content": "0.72 + 30.45 / 8.7 的 商 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19329", "content": "饲养场 养鸭 有 399 只 ， 是 养 鹅 只 数 的 3 倍 ． 养鸡 的 只 数 比 鹅 多 146 只 ， 饲养场 养 了 多少 只 鸡 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17916", "content": "为 庆祝 新年 买 了 12 个 红 气球 ， 买 的 黄 气球 是 红 气球 的 (3/4) ， 黄 气球 又 是 蓝 气球 的 (1/2) ． 蓝 气球 买 了 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6527", "content": "同乐 学校 六年级 有 男生 80 人 ， 女生 60 人 ， 女生 比 男生 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19672", "content": "一 辆 客车 0.8 小时 行驶 44 千米 ， 用 同样 的 速度 从 a 城 开往 b 城 需要 2.5 小时 ． a 、 b 两城 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11616", "content": "小兵 和 爸爸 一起 到 健身房 量 了 身高 ． 量 得 小兵 的 身高 是 140 厘米 ， 比 爸爸 要 矮 (1/5) ， 爸爸 的 身高 = 多少 厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6884", "content": "一 本 笔记本 的 价钱 是 6.75 元 ， 比 一块 橡皮擦 贵 4.5 元 ， 买 一本 笔记本 和 一块 橡皮擦 共 要 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13449", "content": "张 华 骑车 从 学校 去 少年宫 ， 已知 他 骑车 每分钟 行 210 米 ， 行 了 8 分钟 ， 距 少年宫 还有 140 米 ． 从 学校 到 少年宫 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "543", "content": "一 个 最 简分数 ， 它 的 分子 缩小 3 倍 ， 分母 扩大 5 倍 后 可 约 成 (2/7) ， 原 分数 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20335", "content": "减数 和 差 都 是 100 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15056", "content": "一 本书 共 192 页 ， 小强 每天 看 24 页 ， 小 明 每天 看 32 页 ， 小强 比 小 明 迟 几天 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19593", "content": "2009 / (2009/2010) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19513", "content": "要 使 2.3 * □ + 7.7 * □ = 4.06 ， □ 代表 的 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6558", "content": "一 堆 煤 每天 烧 3.6 吨 ， 可以 烧 30 天 ， 如果 每天 烧 2.4 吨 ， 可以 烧 几天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14449", "content": "粮店 运 来 480 千克 面粉 ， 运 来 的 大米 比 面粉 的 5 倍 多 100 千克 ． 粮店 运 来 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2531", "content": "水 凝结 成 冰 后 ， 冰 的 体积 比 水 的 体积 增加 (1/10) ． 3.3 立方分米 的 水 凝结 成 冰 后 ， 冰 的 体积 = 多少 立方分米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19529", "content": "一 个 工程队 计划 架设 电线 5600 米 ， 已经 架设 了 1400 米 ， 剩下 的 要 在 8 天 内 完成 ， 平均 每天 架设 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7537", "content": "挖 一条 水渠 ， 第一天 挖 了 3.2 千米 ， 比 第 二 天 多 挖 了 0.65 千米 ， 还 剩下 2.05 千米 没有 挖 ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1824", "content": "铺设 一条 长 1 千米 的 道路 需 7 天 完成 ， 平均 每天 铺设 的 道路 长度 为 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19059", "content": "有 两捆 粗细 相同 的 铁丝 ， 其中 一捆 铁丝 长 8 米 ， 重 400 千克 ， 另 一捆 铁丝 重 20 千克 ， 这 捆 铁丝 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3273", "content": "长方形 的 宽 是 4 厘米 ， 长 是 宽 的 2 倍 ， 周长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10523", "content": "某 植树 队 种树 250 棵 ， 比 计划 多种 90 棵 ． 超过 计划 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5770", "content": "油菜籽 的 出油率 为 38% ， 要 榨 1140 千克 菜籽油 需要 多少 千克 油菜籽 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8256", "content": "一 个数 的 5 倍 比 78.6 还 多 11.4 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6379", "content": "工厂 要 生产 玩具 900 个 ， 原 计划 6 天 完成 ， 实际 提前 2 天 完成 ， 实际 每天 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20753", "content": "新鲜 坊 水果店 运进 50 箱 冰糖 橘 ， 每箱 重 12 千克 ． 若 每天 销售 75 千克 ， 几天 售完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9661", "content": "从 234 中 每次 减去 6 ， 减 多少 次 结果 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12814", "content": "有 5 个 分数 ： (1/2) ， (1/3) ， (1/4) ， (1/6) ， (1/8) ， 用 “ + 、 - 、 * 、 / ” 各 一个 运算 符号 连接成 一个 4 则 混合 运算 ， 它 的 结果 最大 可以 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20911", "content": "学校 图书馆 有 连环画 180 本 ， 占 图书馆 总数 的 (2/9) ， 图书室 内 共有 图书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13589", "content": "小 东 看 一 本书 ， 每天 看 20 页 ， 4 天 后 还 剩 全书 的 (3/8) 没有 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2530", "content": "一 个 工厂 十 月份 生产 机器 120 台 ， 比 9 月份 多 生产 40 台 ， 增产 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11018", "content": "一 个 长方体 的 体积 是 144 cm ^ 3 ， 它 的 底面 是 一个 边长 6 cm 的 正方形 ， 这个 长方体 的 高 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22318", "content": "一 本 故事书 原价 20 元 ， 现在 每 本 按 原价 打 0.9 出售 ， 每 本 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11212", "content": "新 城市 中小学校 开展 回收 废纸 活 ， 共 回收 废纸 87.5 吨 ． 用 废纸 生产 再生纸 的 再生 率 为 80% ， 这些 回收 的 废纸 能 生 立 多少 吨 再生纸 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20275", "content": "一 块 体积 为 40 立方米 的 长方体 大理石 ， 底 面积 是 8 平方米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "552", "content": "客车 每 小时 行 100 千米 ， 货车 比 客车 的 速度慢 (1/5) ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10470", "content": "大别山 希望 小学 新建 一座 教学楼 ， 原 计划 投资 80 万元 ， 实际 投资 是 计划 的 90% ， 实际 投资 了 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20406", "content": "2.51 * 10 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2239", "content": "两地 相距 1200 米 ， 小 文 和 小 英 同时 从 两地 出发 ， 小 文 每分钟 走 45 米 ， 小 英 每分钟 走 55 米 ． 经过 几分钟 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19334", "content": "新华书店 新 到 一批 儿童读物 ， 第一天 卖出 总数 的 (3/8) ， 第 二 天 卖出 总数 的 40% ， 还 余下 450 本 ， 这 一批 儿童读物 一共 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14247", "content": "一 支 修路 队 要 修路 445 米 ， 已经 修 了 237 米 ， 剩下 的 每天 修 26 米 ， 还要 几天 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20661", "content": "有 100 克 含盐 5% 的 盐水 ， 放置 一段时间 后 蒸发 了 一部分 水 ， 测 得 这时 含盐 率 为 8% ， 蒸发 了 多少 克 水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5769", "content": "6 一 儿童节 ， 王老师 为 小朋友 购买 演出 用 的 服装 ， 买 3 件 t恤 和 5 件 短裤 的 钱 同样 多 ． 每件 短裤 39 元 ， 每件 t恤 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13886", "content": "幼儿园 买来 120 张 彩色纸 ， 买来 的 白纸 比 彩色纸 多 (1/3) ， 两种 纸 一共 有 多少 张 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12576", "content": "一 个数 的 (3/5) + 16 的 和 是 28 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18502", "content": "某种 药水 每瓶 250 毫升 ， 如果 静脉滴注 的 速度 是 每分钟 5 毫升 ， 那么 滴注 完 这样 的 2 瓶 药水 需要 多少 分钟 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2874", "content": "农机 修造厂 3 个 月 节约 用 煤 9.6 吨 ， 每吨 煤 交 64.7 元 ， 平均 每月 节约 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16451", "content": "爸爸 带 的 钱 刚好 能 买 8 千克 苹果 ， 现在 买 了 4.5 千克 ， 还 剩 10.5 元 ， 每千克 苹果 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20116", "content": "剪 一朵花 要 用 (1/4) 张 纸 ， 乐乐 剪 了 9 朵 ， 淘气 剪 了 11 朵 ． 他们 一 共用 了 多少 张 纸 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16353", "content": "商店 按 每个 60 元 购进 了 50 个 足球 ， 全部 售出 后 获利 1950 元 ， 则 每个 足球 的 售价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15312", "content": "一 个 比 的 前项 、 后 项 与 比值 的 和 是 125 ， 比值 是 5 ， 前项 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "23030", "content": "修 一条 公路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 全长 的 25% ， 还 剩下 1400 米 没 修 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9481", "content": "少年宫 的 舞蹈队 有 48 人 ， 乐器 队 共有 27 人 ， 合唱队 的 人数 比 舞蹈队 和 乐器 队 的 总数 多 10 人 ， 合唱队 有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11950", "content": "宏志 小学 五年级 有 3 个 班 ， 甲 、 乙 两班 共有 学生 75 人 ， 乙 、 丙 两班 共有 学生 81 人 ， 已知 乙班 学生 占 全年 级 的 (2/11) ， 该校 五年级 共有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11693", "content": "甲乙 两辆 汽车 的 速度 比 为 4 ： 3 ， 两车 分别 从 ab 两地 出发 相向 而 行 ， 10 分钟 相遇 ． 如果 同 向 而 行 （ 乙 在 前 、 甲 在 后 ） 几分钟 后 甲 追 上 乙 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21909", "content": "买 3 枝 钢笔 比 买 5 枝 水性 笔 贵 3.9 元 ， 每枝 水性 笔 的 价钱 是 1.2 元 ， 每枝 钢笔 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15136", "content": "庆祝 元旦 ， 同学 们 做 了 65 朵 红花 和 25 朵 黄花 ． 每 5 朵 扎成 一束 ， 同学 们 一共 做 了 多少 束 花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13863", "content": "一 只 熊猫 体重 75 千克 ， 一只 小 象 的 体重 比 熊猫 的 12 倍 少 20 千克 ， 小 象 的 体重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9026", "content": "一 箱 苹果 ， 吃 了 (2/5) ， 吃 了 18 颗 ， 这 箱 苹果 原有 多少 颗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17392", "content": "我校 共有 学生 720 人 ， 期初 转 进 男生 的 (1/20) ， 这时 全校 比 原来 多 了 18 人 ， 这个 学校 原有 男生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17113", "content": "甲 、 乙 两地 相距 960 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 45 千米 ； 另 一辆 汽车 从 乙地 开往 甲地 ， 每 小时 行 35 千米 ， 两车 从 两地 同时 相对 开出 3 小时 后 ， 两车 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17357", "content": "一 个数 的 5 倍 是 2.5 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10059", "content": "两个 因数 的 积 是 4.8 ， 一个 因数 扩大 到 原来 的 6 倍 ， 另 一个 因数 缩小 到 原来 的 (1/3) ， 得到 的 新 数 的 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16004", "content": "校 田径队 有 24 名 女同学 ， 是 男同学 的 (4/5) ． 校 田径队 一共 有 多少 名 同学 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9666", "content": "一 辆 汽车 每 小时 行驶 68 千米 ， 上午 行驶 4 小时 ， 下午 行驶 5 小时 ， 这辆 汽车 一天 共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21541", "content": "一 桶 油 连 桶 重 45 千克 ， 倒 出 桶 中油 的 (3/7) ， 连 桶 重 27 千克 ， 桶 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6622", "content": "小小 第一天 做 了 2 道 数学题 ， 第 二 天 比 前一天 多 做 1 道 题 ， 两天 共 做 多少 道 题 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14535", "content": "42 的 (5/6) - 32 所得 的 差 去除 (4/5) ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15662", "content": "阳光 饭店 去年 的 营业额 是 450 万元 ， 按 营业额 的 5% 缴纳 营业税 ， 这个 饭店 去年 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12341", "content": "计算 ： 4.75 - 9.64 + 8.25 - 1.36 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8728", "content": "一 个 加数 是 11 ， 另 一个 加数 是 5 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11914", "content": "一 桶 油 5 千克 ， 第一次 倒 出 油 的 (1/2) ， 第 二 次 倒 出 1 千克 ， 桶 内 还 剩 油 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1891", "content": "一 块 合金 重 600 千克 ， 其中 含 铝 60% ， 含 锡 20% ， 其余 是 铅 ． 这块 合金 含铅 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22962", "content": "一 个 长方体 的 金鱼缸 ， 长 是 8 分 米 ， 宽 是 5 分 米 ， 高 是 6 分 米 ， 不 小心 前面 的 玻璃 被 打坏 了 ， 修理 时 配 上 的 玻璃 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14511", "content": "两个 修路 队 修路 ， 第一队 修 了 184 米 ， 比 第 二 队 少 修 48 米 ， 两个 队 共 修 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2402", "content": "光华 服装厂 26 天 生产 了 9126 件 衬衣 ． 平均 每天 生产 多少 件 衬衣 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6831", "content": "一 台 学习机 的 售价 是 256 元 ， 一台 液晶 电视机 的 价格 是 学习机 的 13 倍 还 多 290 元 ， 一台 液晶 电视机 的 价格 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22346", "content": "一 把 椅子 150 元 ， 一张 书桌 的 价钱 是 一把 椅子 的 4 倍 ， 买 这样 的 一套 桌椅 要 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13087", "content": "某 建筑工地 运 来 一堆 水泥 ， 第一天 用 了 总数 的 (1/5) ， 第 二 天 用 了 总数 的 25% ， 第 3 天 用 了 15 吨 ， 还 剩 7 吨 ． 这 批 水泥 原有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13996", "content": "王 欣 和 陆 亮 两 人 同时 从 相距 2000 m 的 两地 相向 而 行 ， 王 欣 的 速度 为 110 m / min ， 陆 亮 的 速度 为 90 m / min ， 如果 一只 狗 以 500 m / min 的 速度 与 王 欣 同时 同 向 而 行 ， 遇到 陆 亮 后 ， 立即 回头 向 王 欣 跑 去 ， 遇到 王 欣 再 向陆 亮 跑 去 ． 这样 不断 来回 ， 直到 王 欣 和 陆 亮 相遇 为止 ， 狗 共 行 了 多少 m ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20894", "content": "昌江 汇源 芒果园 去年 原 计划 收 得 芒果 120 吨 ， 实际 收 得 芒果 138 吨 ， 实际 收 得 芒果 比 原 计划 增加 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14523", "content": "一 个数 的 (2/3) 是 60 ， 这个 数 的 (1/2) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7173", "content": "小 凡 有 13.5 元 钱 ， 小 方 有 11.3 元 钱 ， 两个 人 准备 合 买 一套 书 ， 还 差 4.2 元 ， 这 套书 售价 = 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "262", "content": "被除数 是 123 ， 商 是 15 ， 余数 是 3 ， 除数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21482", "content": "一 条 (3/10) 米 长 的 绳子 和 一条 (6/10) 米 长 的 绳子 合 起来 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21488", "content": "6 （ 1 ） 班 今天 缺勤 人数 是 出勤 人数 的 (1/8) ， 后 又 有 4 人 请 病假 ， 于是 缺勤 人数 是 出勤 人数 的 25% ． 这个 班 共有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3973", "content": "商店 运 来 苹果 120 千克 ， 是 运 来 的 梨 的 (8/9) ， 运 来 梨 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12484", "content": "长颈鹿 比 大象 高 (3/5) ， 是 指 长颈鹿 是 大象 高 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20474", "content": "某 船 在 静 水中 的 速度 是 每 小时 15 千米 ， 它 从 上游 甲地 开往 下游 乙地 共 花 了 8 小时 ， 水速 每 小时 3 千米 ． 则 这 船 从 乙地 返回 甲地 需要 几小时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9102", "content": "两根 电线杆 之间 相距 30 米 ， 中间 等 距离 地 栽 了 5 棵 树 ， 那么 第 2 棵 树 到 第 4 棵 树 之间 相距 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7136", "content": "229 + 22 与 37 的 积 的 和 ， 再 除以 7 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19040", "content": "5 （ 6 ） 班 图书 角 书架 中 的 图书 ， 故事书 占 (1/3) ， 漫画 类 占 (1/4) ， 科技类 占 (2/5) ， 其余 为 文体 类 ， 文体 类 占 这些 书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22747", "content": "泸州 出租车 的 收费 标准 是 ： 起步价 7 元 ， 3 千米 后 每 千米 增收 2 元 ． 小 玉 从 西南 商贸城 乘 出租车 到 大山 坪 ， 付出 了 11 元 ． 从 西南 商贸城 到 大山 坪 大约 有 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15344", "content": "水果 批发部 卖出 水果 36000 千克 ， 还 剩下 总数 的 (1/4) ， 水果 总数 = 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14510", "content": "学校 图书馆 买来 840 本书 ， 放在 6 个 书架上 ， 每个 书架 有 5 层 ． 平均 每层 放 了 多少 本书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17904", "content": "有 甲 、 乙 两袋 米 ， 甲 袋装 米 15 千克 ， 如果 从 乙 袋中 倒 出 (1/5) 给 甲 袋 ， 则 两袋 米 就 同样 重 ． 这 两袋 米 共 重 多少 千克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15902", "content": "小 方 把 200 元 钱 存入 银行 ， 定期 5 年 ， 年利率 是 2.88% ， 到期 后 小 方可 得 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10550", "content": "在 比例 里 两 外 项 的 积 是 12 ， 一个 内 项 是 6 ， 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3291", "content": "城关 小学 五年级 的 328 名 同学 去 参观 农业 科技 示范园 ， 已经 去 了 48 人 ． 剩下 的 每 20 人 乘 一辆 中巴车 ， 需要 多少 辆 中巴车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7108", "content": "果园 里 有 苹果树 180 棵 ， 梨树 比 苹果树 多 (2/9) ． 梨树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14624", "content": "一 个数 的 (2/7) 是 8 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6657", "content": "同学 们 参加 课外活动 ． 书画 组 有 25 人 ， 合唱组 的 人数 是 书画 组 的 4 倍 ， 书画 组 比 合唱组 少 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20265", "content": "南山 小学 小 记者站 有 学生 30 人 ， 比 合唱队 人数 的 (1/4) 多 10 人 ， 南山 小学 合唱队 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2731", "content": "手表 厂 要 生产 一批 手表 ， 原 计划 每天 生产 672 只 ， 15 天 完成 ． 实际 提前 3 天 完成 ， 实际 每天 比 原 计划 多 生产 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6250", "content": "环城路 有 二 室 一 厅 房屋 一套 ， 面积 是 78 平方米 ， 售价 是 2780 元 / 平方米 ． 买 这 套 住房 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11983", "content": "雷声 在 空气 中 的 传播速度 约 是 每秒 0.33 千米 ， 小 华 看见 远处 打闪 以后 ， 经过 4 秒 后 听见 雷声 ． 问 打闪 的 地方 离 小 华 有 多 远 ？ （ 从 打闪 起到 看见 闪电 的 时间 略去 不计 ． ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6566", "content": "一 项 工程 ， 甲队 单独 做 每天 完成 全 工程 的 (1/10) ， 乙 队 单独 做 每天 完成 全 工程 的 (1/15) ， 两队 合作 多少 天 可以 完成 全部 工程 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13729", "content": "小 明 在 书店 买 了 两本 故事书 ． 《 寓言故事 》 5.36 元 ， 另 一本 《 阿凡提 的 故事 》 比 《 寓言故事 》 贵 3.25 元 ． 小 明 买 这 两本 故事书 一 共用 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20393", "content": "一 条 公路 长 360 千米 ， 小汽车 行 了 2.5 小时 后 ， 还 剩 210 千米 ， 小汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12368", "content": "日记本 的 单价 是 8.45 元 ， 20 本 装 一包 ， 学校 买 了 7 包 ， 共 要 付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4841", "content": "王 宁 把 2000 元 存入 银行 整存整取 5 年 ， 年利率 为 3% ， 到期 后 他 可 得到 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22946", "content": "一 只 蝴蝶 每 小时 飞行 8.7 千米 ， 一只 蜜蜂 的 飞行速度 是 这 只 蝴蝶 的 2.4 倍 ． 这 只 蜜蜂 每 小时 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5571", "content": "生产 一批 零件 ， 我们 每天 生产 200 个 ， 15 天 可 完成 ， 实际 每天 超产 50 个 ， 那么 多少 天 可以 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9768", "content": "一 个 鸡蛋 约 重 (1/25) 千克 ， 妈妈 今天 买 回 65 个 鸡蛋 ， 这些 鸡蛋 约 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3623", "content": "甲 、 乙 两 人 步行 同 一段路 所用 的 时间 比 为 4 ： 3 ， 若 甲 先 走 2 分钟 ， 结果 两 人 同时 到达 ， 则 乙 走 完全 程 所 需 时间 为 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18872", "content": "小男孩 要 买 5 本 练习本 ， 小女孩 要 买 3 本 练习本 ， 小男孩 要 比 小女孩 多付 8 角钱 ， 每 本 练习本 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20465", "content": "一 本 定价 9 元 的 词典 ， 0.8 出售 仍 可以 赚 20% ． 这 本词典 的 进价 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1577", "content": "甲 、 乙 两 船 同时 从 相距 240 千米 的 a 、 b 两 港 相对 开出 ， 6 小时 后 ， 甲 船 行 了 全程 的 (3/4) ， 乙 船 行 了 全程 的 (2/3) ， 这时 两 船 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3049", "content": "小 方 的 爸爸 比 小 方 大 27 岁 ， 当 小 方 爸爸 的 年龄 是 小 方 年龄 的 2.5 倍 时 ， 小 方 多少岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9900", "content": "幼儿园 买来 一些 糖果 ， 第一次 吃 了 它 的 (1/5) ， 第 二 次 吃 了 它 的 (1/6) ， 两次 一共 吃 了 这些 糖果 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8450", "content": "做 一个 高 4 米 ， 底 周长 1.25 米 的 圆柱形 烟囱 ， 需要 铁皮 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14921", "content": "0.53 / 0.14 竖 式 计算 时 ， 除 得 的 商 是 3 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10135", "content": "要 修 一条 水渠 ， 已经 修 了 它 的 (2/5) ， 再 修 300 米 ， 就 能 修好 这 条 水渠 的 (1/2) ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3988", "content": "一 桶 油 ， 用 去 10 千克 ， 剩下 的 比 用 去 的 多 (4/5) ， 还 剩 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "846", "content": "公共 车上 有 乘客 45 人 ， 到 1 号 站 下车 12 人 ， 又 上车 19 人 ， 现在 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16418", "content": "一 本书 的 售价 是 26 元 ， 这 本书 售出 后 可 获得 30% 的 利润 ， 这 本书 的 成本 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21528", "content": "某 皮鞋 店 调进 皮鞋 225 双 ， 其中 男装 皮鞋 的 双数 相当于 女装 皮鞋 的 (7/8) ， 这个 皮鞋 店 调进 女装 皮鞋 多少 双 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19710", "content": "一 桶 油 ， 吃 了 3 千克 ， 还 剩 全 桶 的 (4/5) ， 这 桶 油 原有 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20163", "content": "小 华 的 爸爸 把 4000 元 存入 银行 ， 定期 一年 ， 年利率 为 2.25% ， 到期 后 去 款 时 ， 银行 按规定 扣除 20% 的 利息 所得税 18 元 ， 小 华 的 爸爸 实际 多 得到 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22012", "content": "a 品牌 豆浆机 每 台 129 元 ， b 品牌 豆浆机 的 价格 是 a 品牌 的 3 倍 ， 两种 品牌 豆浆机 每 台 相差 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6689", "content": "某校 有 座椅 150 套 ， 运走 50 套 ． 运走 的 是 原来 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1114", "content": "列式 计算 ： 一个 数 的 (4/9) / (2/3) 得 72 ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21209", "content": "学校 四年级 男 、 女生 人数 相同 ， 他们 要 参加 体育 会操 表演 ， 男生 每排 30 人 ， 排 了 14 排 ． 女生 每排 35 人 ， 可以 排 几排 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11051", "content": "新星 服装厂 十二 月份 计划 加工 服装 450 套 ， 结果 上 半月 完成 计划 的 (4/5) ， 下半月 完成 计划 的 60% ， 这个 月 比 原 计划 多 加工 多少 套 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8138", "content": "机床厂 第一 车间 有 55 人 ， 第 二 车间 有 45 人 ， 每人每天 平均 生产 261 个 零件 ， 这 两个 车间 每天 共 生产 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5269", "content": "一 种 零件 ， 由 原来 每件 80 元 ， 降低 到 48 元 ， 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17935", "content": "小 明 家 从 银行贷款 100 万元 购买 经济 适用房 ． 贷款 期限 为 10 年 ， 年利率 为 8% ． 如果 按时 偿还 ， 连本带利 应 给 银行 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17807", "content": "口 口 口 口 / 8 ， 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22252", "content": "客车 和 货车 同时 从 相距 2160 千米 的 两地 相向 而 行 ， 客车 每 小时 行 80 千米 ， 货车 每 小时 的 速度 是 客车 的 (4/5) ． 经过 多少 小时 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11239", "content": "在 一次 测试 中 ， 张 良 伟 科学 考 了 70 分 ， 刘 仁 杰 的 分数 比 张 良 伟 少 考 (1/7) ， 刘 仁 杰 考 了 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14505", "content": "希望 小学 修 一条 200 米 的 跑道 ， 已经 修 了 160 米 ， 还 剩 多少 米 没有 修 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15709", "content": "小汽车 的 速度 是 95 千米 / 时 ， 大客车 的 速度 是 105 千米 / 时 ． 两车 分别 从 北京 和 上海 同时 相向 开出 ， 约 7 小时 相遇 ． 北京 到 上海 的 距离 约 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8877", "content": "汽车 拉力赛 场地 赛 ， 赛程 为 105 圈 ， 车手 甲 是 初次 参赛 ， 车手 乙 是 著名 车手 ， 因而 乙 的 速度 是 甲 的 1.5 倍 ， 当 他们 从 起点 一起 出发 后 ， 过 了 一段时间 ， 车手 乙 的 赛车 出现 故障 ， 进行 修理 ， 修理 期间 ， 甲 一直 在 前进 ； 乙 修好 车 时 ， 甲 已 领先 乙 5 圈 ， 乙 以 原 速 奋起直追 ， 到 终点 时 ， 反而 比 甲 超出 3 圈 ， 问 乙 修理 期间 ， 甲 跑 了 多少 圈 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11750", "content": "甲 、 乙 两地 相距 460 千米 ， 一列 客车 和 一列 货车 同时 从 两地 相对 开出 4 小时 后 相遇 ． 客车 每 小时 行 60 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15326", "content": "王 刚 买 回 一段 布 ， 缩水 后 长 2.4 米 ， 缩水率 为 4% ， 他 买回来 多少 米 布 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17172", "content": "一 根 绳子 长 9 米 ， (5/9) 根 绳子 长 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14960", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相向 开出 ， 经过 2.5 小时 后 两车 在 途中 相遇 ； 已知 甲 车 的 速度 是 90 千米 / 时 ， 乙 车 的 速度 是 甲 车 速度 的 (4/5) ． 问 a 、 b 两地 之间 的 路程 大约 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15722", "content": "买 一件 大衣 的 钱 可以 买 3 件 毛衣 ， 一件 大衣 420 元 ． 一件 毛衣 比 一件 大衣 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4774", "content": "学校 买来 一批 体育用品 ， 其中 乒乓球 有 160 个 ， 是 买来 羽毛球 的 4 倍 ， 学校 买来 羽毛球 比 乒乓球 少 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16625", "content": "计算 ： 123 * 32 * 125 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15567", "content": "一 台 洗衣机 打 了 0.8 后 的 售价 1200 为 元 ， 那么 原价 为 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20842", "content": "丁 老师 出 了 两道 数学题 给 数学 兴趣小组 的 18 名 同学 做 ， 做 对 第一道 题 的 有 10 名 同学 ， 做 对 第 二 道 题 的 有 12 名 同学 ， 没有 一道 也 没有 做 对 的 同学 ． 两道 题 都 做 对 了 的 同学 有 几名 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3728", "content": "修 一段 120 千米 长 的 高速 公里 ， 第一周 修 了 全长 的 20% ， 第 二 周 修 了 全长 的 40% ， 一共 修 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5210", "content": "一 个数 的 4.5 倍 是 5.58 ， 这个 数 的 1.2 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3176", "content": "王师傅 计划 做 一批 零件 ， 第一天 做 了 计划 的 (4/7) ， 第 二 天 又 做 了 余下 的 (3/5) ， 这时 还 剩 42 个 零件 没 做 ， 王师傅 计划 做 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11974", "content": "水果店 有 苹果 23 千克 ， 桃子 的 质量 比 苹果 的 4 倍 少 6 千克 ． 两种 水果 一共 有 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1728", "content": "五年级 有 女生 160 人 ， 男生 比 女生 少 10% ， 五年级 有 男生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2221", "content": "计算 ： 1 - (5/4) + (7/12) - (9/20) + (11/30) + (15/56) = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "18350", "content": "甜瓜 每千克 3.2 元 ， 奶奶 爱 吃 甜瓜 ， 冬冬 为 奶奶 买 了 5 千克 ， 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15031", "content": "甲 数 的 3.75 倍 等于 乙 数 的 15 倍 ， 已知 乙 数 是 0.8 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "95", "content": "鹅 的 孵化期 是 30 天 ， 鹅 的 孵化期 的 (4/5) 等于 鸭 的 孵化期 ； 鸡 的 孵化期 是 鸭 的 (3/4) ． 鸡 的 孵化期 = 多少 天 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1197", "content": "学校 田径队 进行 长跑 训练 ， 上周 前 3 天 共 跑 了 3.6 千米 ， 后 4 天 共 跑 了 5.15 千米 ． 上周 学校 田径队 平均 每天 跑 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14227", "content": "一 个 工厂 用 3 辆 汽车 运煤 ， 一共 运煤 9750 千克 ， 平均 每辆 汽车 运 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3380", "content": "6 （ 1 ） 班 征订 《 小数 报 》 的 《 数学 小灵通 》 ， 每人 至少 一种 ， 全班同学 的 60% 订 了 《 小数 报 》 ， (4/7) 订 了 《 数学 小灵通 》 ． 这 两种 报纸 都 订 的 有 6 人 ， 订 《 小数 报 》 的 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15127", "content": "一 本书 有 142 页 ， 小 亚 看 了 4 天 ， 还 剩 36 页 没 看 ． 她 平均 每天 看 多页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19147", "content": "筑 一条 长 6.4 千米 的 公路 ， 前 3 个 月 平均 每月 筑 1.2 千米 ， 剩下 的 每月 修 1.4 千米 ， 还要 几个 月 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5675", "content": "218 - 15 与 13 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16791", "content": "一 本书 共 80 页 ， 第一次 看 了 它 的 (1/4) ， 第 二 次 看 了 它 的 (2/5) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13291", "content": "同学 们 去 春游 ， 带 水壶 的 有 78 人 ， 带 水果 的 有 77 人 ， 既 带 水壶 又 带 水果 的 有 48 人 ， 每人 至少 带 一种 ． 参加 春游 的 同学 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18465", "content": "一 套 房子 的 原价 是 48 万元 ， 提价 20% 后 转卖 出去 了 ， 提价 后 这 套 房子 的 价格 = 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11961", "content": "小 丁丁 家住 的 小区 共有 20 幢 6 层 的 楼房 ， 每层 住 8 户 人家 ， 这个 小区 一共 住 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20041", "content": "一 辆 客车 的 速度 是 每 时 78.5 千米 ， 从 甲地 开往 乙地 用 了 8.5 小时 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18552", "content": "一 个 圆 的 半径 是 2 米 ， 如果 把 这个 圆 的 半径 增加 1 米 ， 那么 它 的 面积 增加 多少 平方米 ？", "knowledge": ["*", "+", "-", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "14408", "content": "甲 、 乙 两列 火车 同时 从 昆明 开往 北京 ． 甲 车 每 小时 行 75 千米 ， 乙 车 每 小时 行 69 千米 ， 经过 8 小时 ， 两车 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4655", "content": "华华 从 家 到 游乐 宫 去 ， 上坡 用 了 5 分钟 ， 平均 每分钟 走 45 米 ； 下坡 用 了 4 分钟 ， 平均 每分钟 走 63 米 ． 华华 从 家 到 游乐 宫 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13745", "content": "两个 加数 都 是 40 ， 和 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15820", "content": "工人 师傅 要 修 一条 水渠 ， 原 计划 每天 修 0.45 千米 ， 30 天 完成 ， 实际 每天 的 工作效率 是 原 计划 的 1.2 倍 ， 完成 这项 任务 ， 实际 需要 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16775", "content": "修 一段路 ， 第一天 修 了 全长 的 (1/3) ， 第 二 天 修 了 全长 的 25% ， 还 剩下 350 米 没有 修 ， 这 段 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5693", "content": "一 副 羽毛球拍 的 价钱 是 32 元 ， 小 敏 买 了 一副 羽毛球拍 和 2 个 羽毛球 ， 一 共用 去 了 42 元 ， 一个 羽毛球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2147", "content": "小 芳 看 一本 « 格林童话 » ， 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 了 全书 的 (1/5) ， 还有 72 页 没 看 ， 这本 童话 书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17129", "content": "芝麻 的 出油率 是 48% ， 要 榨 720 千克 芝麻油 ， 需要 芝麻 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20630", "content": "一 个 商人 把 一件 连衣裙 标价 为 640 元 ， 经 工商 人员 核价 ， 降 至 60 元 出售 ， 仍 可 获利 20% ， 如 按 原 标价 出售 则 一条 裙子 可 获 暴利 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16542", "content": "永丰 农场 去年 种 玉米 52 公顷 ， 种 大豆 的 面积 比 种 玉米 的 面积 多 25% ， 种 大豆 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17821", "content": "一 个 电机厂 前年 生产 电机 500 台 ， 去年 比 前年 增产 10% ， 去年 生产 电机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9301", "content": "甲 、 乙 两车 分别 从 两地 同时 相对 开出 ， 当 两车 相距 35 千米 时 ， 甲 车行 了 全程 的 (3/4) ， 乙 车行 了 全程 的 (1/5) ． 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18000", "content": "50 千克 面粉 增加 10% 后 重 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8275", "content": "60 的 20% 正好 是 一个 数 的 75% ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16988", "content": "果园 里 有 桃树 360 棵 ， 梨树 的 棵 树 是 桃树 的 (3/4) ， 又 是 苹果树 的 (2/3) ． 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13386", "content": "某 饲养场 养 了 360 只 鸡 ， 是 鸭 的 只 数 的 (9/7) ． 饲养场 养 了 多少 只 鸭 ？ 鸭 的 只 数 相当于 鹅 的 (7/8) ． 饲养场 养 了 多少 只 鹅 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5424", "content": "一 件 上衣 打 了 0.85 后 售价 是 170 元 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19970", "content": "一 本书 240 本 ， 小 红 8 天 看 完 192 页 ， 照 这样 计算 ， 其余 的 还 需要 几天 读完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13871", "content": "合唱队 原有 48 人 ， 又 来 了 2 人 ， 如果 每 5 人 分 一组 ， 可以 分 几组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15359", "content": "500 + 23 * 19 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8965", "content": "剧场 一共 有 900 个 座位 ， 只有 前 4 排 坐满 了 人 ， 每排 132 个 座位 ， 还有 多少 个 座位 没有 坐 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2737", "content": "甲 乙丙 3 人 有 一些 书 ， 其中 200 本 是 甲 的 ， 750 本 不是 乙 的 ， 则 丙 有 多少 本 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8317", "content": "一 种 什锦糖 是 按 2 份 奶糖 、 5 份 水果糖 和 3 份 软糖 混合 成 的 ． 要 配制 这样 的 什锦糖 40 kg ， 需要 水果糖 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10927", "content": "人体 中 血液 重量 约 占 人体 重量 的 (1/13) ． 小 明 的 体重 是 52 千克 ， 他 体内 的 血液 约 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11353", "content": "3 个 班 去 植树 ， 甲班 植树 42 棵 ， 乙班 植树 棵 数 是 甲班 的 (5/7) ， 丙 班 植 的 棵 树 比 乙班 的 (4/3) 倍 还 少 3 棵 ， 丙 班 植树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1488", "content": "儿童 体内 的 水分 约 占 体重 的 (4/5) ， 小 明 体内 有 28 千克 的 水分 ， 小 明 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18676", "content": "一 个 剧场 设置 了 40 排座位 ， 第一排 有 76 个 座位 ， 往后 逐 排比 前 一排 多 2 个 座位 ， 最后 一排 有 152 个 座位 ， 这个 剧场 一共 设置 了 多少 个 座位 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "169", "content": "图书馆 新 购进 一批 书 ， 共 3 种 ． 其中 文艺 书 25 本 ， 百科全书 9 本 ， 故事书 的 本 数 比 文艺 书 的 2 倍 还 多 10 本 ， 这 批 书 共有 多少 本 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "7670", "content": "(1/4) 与 (1/5) 的 差 除 一个 数 得 10 ， 求 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14897", "content": "甲班 有 优等生 24 人 ， 乙班 的 优等生 比 甲班 少 (1/6) ， 两个 班 优等生 占 全年 级 总数 的 44% ， 要 使 优等生 总 人数 达到 全年 级 (13/25) ， 需要 增加 优等生 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "11227", "content": "五年级 有 学生 200 人 ， 六年级 有 学生 240 人 ， 六年级 的 人数 比 五年级 的 人数 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11900", "content": "一 根 木料 锯 成 3 段 要 用 12 分 ， 那么 用 同样 的 速度 把 这根 木料 锯 成 6 段 ， 要 用 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16459", "content": "压路机 的 滚筒 是 一个 圆柱体 ， 它 的 底面 直径 是 1 米 ， 长 2 米 ． 每 滚动 一周 能 压 多 大面积 的 路面 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6028", "content": "有 20 筐 苹果 共 重 540 千克 ． 如果 每 筐 苹果 多 装 (1/9) ， 每 筐 苹果 能 装 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5967", "content": "修建 一座 厂房 ， 计划 比 实际 多 投资 12 万元 ， 实际 比 计划 节约 了 12.5% ， 实际 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22225", "content": "妈妈 去 菜市场 买菜 ， 白菜 1.8 元 / 千克 ， 土豆 的 价格 是 白菜 的 1.5 倍 ， 土豆 单价 比 白菜 贵 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22619", "content": "棋子 若干枚 ， 恰好 可以 排成 每 边 9 枚 的 方阵 ， 棋子 总数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5647", "content": "依法 纳税 是 每个 公民 的 义务 ． 张老师 上个月 的 工资总额 是 2600 元 ， 按照 个人所得税法 的 有关 规定 ， 超过 1600 元 的 部分 要 缴纳 5% 的 个人所得税 ， 那么 张老师 上个月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10347", "content": "一 件 工作 ， 甲 要 (1/4) 小时 完成 ， 乙 要 (1/5) 小时 完成 ， 甲乙 合 做 要 多少 小时 完成 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15624", "content": "我校 今天 学生 的 缺勤 率 是 2% ， 有 539 人 到校 上课 ． 全校 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9141", "content": "一 块 钢材 的 (2/3) 是 (6/7) 吨 ， 这块 钢材 重 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4095", "content": "100 g 含糖 28% 的 糖水 要 变成 含糖 10% 的 糖水 ， 需要 加水 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6110", "content": "甲 数 是 50 ， 乙 数 比 甲 数 的 (7/10) 多 3 ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17883", "content": "饮料厂 计划 生产 可乐 600 箱 ， 已经 生产 了 376 箱 ， 剩下 的 每天 生产 28 箱 ， 多少 天 可以 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21145", "content": "一 个 圆形 的 花园 周长 是 150 米 ， 沿 花园 的 外圈 每隔 10 米 栽 一棵树 ． 一共 可以 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4915", "content": "60 + 70 的 2 倍 ， 所得 的 和 除以 450 ， 商 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9403", "content": "甲乙 两个 城市 之间 的 公路 长 240 千米 ． 一辆 汽车 在 高速公路 上 平均 每 小时 可 行驶 80 千米 ， 在 普通 公路 上 平均 每 小时 只能 行驶 40 千米 ． 这辆 汽车 从 甲 市 到 乙 市 走 高速公路 要 比 走 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8413", "content": "三年级 同学 分 7 个 小组 参加 建校 活动 ， 平均 每个 小组 搬 砖 240 块 ， 还 剩 350 块 ， 其 有 砖 多少 块 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15274", "content": "四年级 （ 1 ） 班 的 学生 订阅 了 甲 、 乙 、 丙 3 种 期刊 ， 且 每人 都 订阅 了 2 种 不同 的 期刊 ， 其中 甲种 期刊 28 本 ， 乙种 期刊 36 本 ， 丙种 期刊 38 本 ． 那么 ， 既 订阅 甲种 期刊 又 订阅 丙种 期刊 的 学生 有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14190", "content": "李 华 把 8000 元 钱 存 人 银行 ， 定期 5 年 ， 年利率 按 2.88% 算 ， 到期 李 华 可 取回 本金 和 税后 利息 一共 多少 元 ？ （ 按 5% 缴纳 利息税 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14845", "content": "美术学院 有 一个 2 层 展览馆 每层 有 4 个 展厅 ， 在 这些 展厅 里 一共 放 了 240 幅 画 ， 平均 每个 展厅 放 多少 幅 画 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11938", "content": "1 个 长方形 的 面积 是 12.56 平方米 ， 长 是 6.28 米 ， 宽 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6532", "content": "王庄村 要 修 一条 600 米 长 的 公路 ． 每天 修 了 46 米 ， 已经 修 了 12 天 ， 还有 多少 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5695", "content": "特快 列车 的 速度 是 160 千米 / 时 ， 从 甲 站 到 乙 站 行驶 了 5 小时 ． 甲乙 两站 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15133", "content": "一 个 月 过去 了 ， 到 了 结算 的 日子 ， 学校 总务主任 清理 学校食堂 的 各种 花费 ， 发现 这个 月 的 大米 用 得 比 上 月 多 了 15 千克 ， 于是 向 学校食堂 的 炊事员 询问 原因 ， 炊事员 说明 情况 后 向 总务主任 汇报 说 ： “ 我们 食堂 这个 月 用水 32 吨 ， 比 上个月 节约 20% 呢 ！ ” 总务主任 听 了 以后 想到 ： “ 上个月 用水 多少 吨 ？ ” 同学 们 你 能 帮 总务 主 算 一 算 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3312", "content": "一 个数 的 20% 正好 是 40 的 (2/5) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3871", "content": "神力 机械厂 计划 加工 2100 个 零件 ， 加工 8 天 后 ， 还 剩下 100 个 ． 平均 每天 加工 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23086", "content": "除数 是 (5/7) ， 商 与 除数 的 差 是 10 ， 商 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20603", "content": "爸爸 一年 12 个 月 的 工资 是 36000 元 ， 按规定 月工资 超过 2000 元 的 部分 要 按 5% 的 税率 缴纳 个人所得税 ， 爸爸 每月 应 缴 多少 元 钱 的 个人所得税 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12820", "content": "小 英 看 一本 300 页 的 小说 ， 已经 看 了 (2/3) ， 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19436", "content": "一 辆 摩托车 打 0.85 后 比 原价 便宜 了 450 元 ， 这辆 摩托车 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13174", "content": "水果店 有 桔子 72 千克 ， 桔子 是 香蕉 的 (2/3) ， 香蕉 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5129", "content": "爸爸 买 了 4.5 千克 香蕉 ， 付给 售货员 30 元 ， 售货员 找 给 他 7.5 元 ． 每千克 香蕉 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2773", "content": "3 台 播种机 4 小时 共 播种 0.96 公顷 ， 平均 每 台 每 小时 播种 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18281", "content": "14.5 * 9.9 + 5.5 * 10.1 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2464", "content": "有 一个 数 ， 比 (5/6) 与 (3/8) 的 差 多 (5/12) ， 这个 数 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22534", "content": "小 亮 买 了 一个 文具盒 用 去 11 元 ， 买 了 一个 小 皮球 用 去 5.3 元 ， 又 买 了 一枝 钢笔 用 去 6.6 元 ， 小 亮 一 共用 去 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20786", "content": "某 印刷厂 要 装订 72000 本 少儿读物 ， 装订 15 天 后 还 剩下 2700 本 没有 装订 ， 平均 每天 装订 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10297", "content": "一 只 小虫 沿 笔直 的 树干 跳 着 往 上行 ， 每 跳 一次 都 比 上 一次 升高 4 厘米 ． 它 从 离 地面 10 厘米 处 开始 跳 ， 如果 把 这 一处 称为 小虫 第一次 落脚点 ， 那么 它 的 第 100 个 落脚点 正好 是 树梢 ， 这 棵 树 高 多少 厘米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17017", "content": "学校 买来 一批 新书 ， 其中 故事书 有 300 本 ， 科技 书 有 180 本 ， 共 占 这 批 新书 的 60% ． 这 批 新书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1076", "content": "一 个 圆柱 侧面 展开 图 是 正方形 ， 它 的 底面 直径 是 2 分 米 ， 圆柱 的 高 = 多少 分 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1251", "content": "小 华 在 旅游 中 拍 了 25 张 照片 ， 洗印 每张 照片 0.45 元 ， 他 一共 要 花 多少 钱 洗印 这些 照片 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8172", "content": "两个 因数 相乘 的 积 是 63 ， 其中 一个 因数 扩大 10 倍 ， 另 一个 因数 扩大 100 倍 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14149", "content": "4 个 工人 5 小时 生产 100 个 电视机 零件 ， 照 这样 计算 ， 要 在 8 小时 内 生产 600 个 电视机 零件 ， 需要 多少 个 工人 ？", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7691", "content": "四年级 有 3 好 学生 30 人 ， 是 全年 级 人数 的 (1/6) ， 四年级 人数 占 全校 人数 的 (2/9) ． 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5361", "content": "水果店 运 来 的 4 筐 苹果 与 3 筐 梨 的 重量 相等 ， 已知 每 筐 梨 的 重量 60 千克 ， 每 筐 苹果 多重 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17199", "content": "买 12 只 排球 的 钱 正好 买 5 只 足球 ， 每 只 排球 85 元 ， 每 只 足球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11109", "content": "某 厂 上 半月 生产 零件 340 个 ， 下半月 生产 个数 是 上 半月 的 (3/2) 倍 ， 全 月 共 生产 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20028", "content": "某 农场 计划 向 国家 交售 4000 吨 棉花 ， 实际 交售 了 4600 吨 ， 超额完成 了 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22369", "content": "一 堆 煤 重 120 吨 ， 第一天 运走 了 总重量 的 20% ， 第 二 天 运走 总重量 的 25% ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2223", "content": "(6/7) 里面 有 多少 个 (2/21) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16114", "content": "学校 图书室 科技 书 占 总数 的 40% ， 故事书 占 总数 的 35% ， 科技 书 比 故事书 多 210 本 ， 学校 图书室 共有 多少 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14943", "content": "有 27 个 桃子 ， 平均 分给 9 只 猴子 ， 每 只 猴子 可以 分 几个 桃子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15449", "content": "计算 ： 200.9 * 200.8 - 200.5 * 201.2 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18816", "content": "小马 看 一本 121 页 的 故事书 ， 已 看 的 页数 和 总 页数 的 比 是 6 ： 11 ， 还有 多少 页 没 看 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22835", "content": "一 列 火车 挂 了 10 节车厢 ， 其中 9 节 各 有 118 个 座位 ， 另 一节 有 78 个 座位 ， 这 列 火车 一共 有 多少 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10753", "content": "一 个 圆 的 半径 是 2 分 米 ， 这个 圆 的 面积 = 多少 平方分米 ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "8232", "content": "利民 工厂 计划 生产 一批 洗衣机 ， 原 计划 25 天 完成 ， 实际 每天 生产 300 台 ， 结果 提前 5 天 完成 任务 ． 原 计划 每天 生产 多少 台 洗衣机 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12546", "content": "学校 有 一个 花园 ， 其中 月季花 的 面积 占 (2/7) ， 朱顶 红 的 面积 占 (1/5) ， 牡丹花 的 面积 比 月季花 和 朱顶 红 的 面积 总和 还 多 占 总面积 的 (1/4) ． 牡丹花 的 面积 占 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18382", "content": "修路 队 计划 修 一条 长 2400 米 的 公路 ， 已经 修 了 6 天 ， 每天 修 250 米 ， 还 剩 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10357", "content": "(19/17) * (1717/1919) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6667", "content": "一 个 圆形 池塘 ， 它 的 周长 是 150 米 ， 每隔 3 米 栽种 一棵树 ． 共 需 树苗 多少 株 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4595", "content": "多少 / 9 = 23 … 5 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8078", "content": "多少 个 (1/5) 是 (3/5) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "136", "content": "在 节能 减排 活动 中 ， 实验 小学 的 “ 环保 小 卫士 ” 共 回收 800 千克 废纸 ， 据 了解 ， 废纸 的 不可 再生 率 是 20% ， 回收 的 这些 废纸 能 生产 多少 千克 再生纸 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19974", "content": "小 明 用 15 分钟 走 了 1 千米 ， 平均 每分钟 走 ( ( ( ) ) / ( ( ) ) ) 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1507", "content": "一 艘 轮船 从 甲 港 开往 乙 港 ， 4 小时 到达 终点 ， 已知 两 港 之间 的 水路 长 128 千米 ， 这 艘 轮船 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12859", "content": "甲乙 两个 工程队 ， 合 修 一条 长 是 5500 米 的 公路 ， 甲队 每天 修 120 米 ， 乙 队 每天 修 100 米 ． 两队 合 修 完 这 条 公路 需要 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21014", "content": "电视机厂 今年 生产 电视机 36000 台 ， 相当于 去年 产量 的 (1/4) ， 去年 生产 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15067", "content": "李 叔叔 骑 摩托车 到 县城 去 学习 ， 每 小时 行驶 42 千米 ， 3 小时 到达 ． 返回 时 只用 了 2 小时 ， 李 叔叔 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8206", "content": "一 种 收音机 ， 现在 每 台 成本 比 原来 降低 了 (3/20) ， 现在 每 台 成本 51 元 ， 原来 每 台 成本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15664", "content": "小 丽 有 4 件 不同 的 上衣 和 3 条 不同 的 裤子 ， 她 有 多少 种 不同 的 穿 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4562", "content": "小 猴 盖房子 ， 它 要 将 一根 10 米 长 的 木头 ， 每 2 米 锯 成 一段 ， 每 锯开 一段 需要 6 分钟 ， 锯 完整 根 木头 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12424", "content": "《 世界 奥数 专刊 》 的 标价 是 40 元 / 本 ， 大赛 组委会 决定 减价 10% 出售 给 参加 “ 世 奥 赛 ” 的 学生 ， 但 打 了 折扣 后 需 附加 5% 作为 税金 ． 那么 ， 参赛 学生 购买 专刊 实际 需要 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22669", "content": "商店 运 来 800 千克 大米 ， 比 面粉 多 5 箱 ， 已知 大米 每 袋 重 25 千克 ， 面粉 每箱 重 20 千克 ， 运 来 面粉 一共 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10365", "content": "从 34 与 57 的 积 里 减去 300 ， 还 剩 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5979", "content": "小 华 从 家 到 少年宫 行 了 全程 的 (2/5) 多 240 米 ， 这时 离家 有 840 米 ， 小 华 家 离 少年宫 有 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15661", "content": "某 车间 有 女工 177 人 ， 男工 人数 是 女工 的 3 倍 还 多 6 人 ， 男工 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8983", "content": "小 明 看 一本 630 页 的 故事书 ， 已经 看 了 (1/7) ， 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23116", "content": "六年级 同学 打算 为 毕业 联欢会 做 50 个 头饰 ． 第一节 课 做 了 计划 的 30% ， 第 二 节 课 做 了 计划 的 (1/2) ． 已经 做成 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9706", "content": "饲养场 养 有 3000 只 兔子 ， 其中 白兔 占 总数 是 20% ， 如果 卖掉 一些 灰 兔 ， 那么 白兔 只 数 占 现有 兔子 总数 的 40% ． 问 卖掉 多少 只 灰 兔 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14435", "content": "体育组 共有 156 根 跳绳 ， 5 组 小朋友 参加 跳绳 比赛 ， 每组 需要 8 根 跳绳 ， 问 ： 还 剩下 多少 根 跳绳 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13079", "content": "商店 运进 两种 球 ， 已知 足球 个数 的 (4/7) 正好 和 篮球 的 个数 相等 ， 足球 是 84 个 ， 篮球 和 足球 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12166", "content": "一 列 慢车 和 一列 快车 分别 从 a 、 b 两站 相对 开出 ， 快车 和 慢车 速度 的 比 是 5 ： 4 ， 慢车 先 从 a 站 开出 27 千米 ， 快车 才 从 b 站 开出 ． 相遇 时 快车 和 b 站 的 距离 比 慢车 和 a 站 的 距离 多 32 千米 ， a 、 b 两站 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "20670", "content": "小 明 读 一本 故事书 ， 已经 读 了 全书 的 25% ， 还 剩下 360 页 没有 读 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4754", "content": "甲 数 是 5600 ， 是 乙 数 的 80 倍 ， 甲乙 两 数 相差 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14407", "content": "礼堂 里 一排 有 19 个 座位 ， 小 明 和 小强 坐在 一起 ， 并且 小 明 在 小强 的 右边 ， 在 同 一排 有 多少 中 不同 的 坐 法 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1518", "content": "王师傅 和 张师傅 共同 生产 一批 零件 ， 王师傅 每天 生产 38 个 ， 张师傅 每天 生产 30 个 ， 他们 一共 生产 了 5 天 完成 了 任务 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12375", "content": "小 芳 将 2000 元 压岁钱 存入 银行 ， 定期 5 年 ， 年利率 为 5.6% ， 到期 后 她 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8571", "content": "18 的 (1/2) 等于 36 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2607", "content": "小 东 在 看 一本 300 页 的 书 ， 他 每天 看 25 页 ， 看 了 3 天 后 ， 第 4 天 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11218", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 前 2 小时 共 行 120 千米 ， 后 3 小时 平均 每 小时 行 55 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16798", "content": "小 明 家 的 圆桌面 的 周长 是 376.8 厘米 ， 这个 圆桌面 的 直径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17840", "content": "一 件 上衣 118 元 ， 是 一件 裤子 的 2 倍 ． 妈妈 买 一件 上衣 和 一件 裤子 共 要 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1167", "content": "小 明 和 小 华 存钱 数 的 比 是 3 ： 7 ， 如果 小 明 再 存入 400 元 ， 就 和 小 华 的 存钱 一样 多 ． 小 明 原来 存 了 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5492", "content": "13 与 62 的 和 除 275 - 125 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22386", "content": "三角形 鱼塘 的 3 条 边 分别 长 40 米 、 60 米 、 70 米 ， 如果 每隔 10 米 栽 一棵树 ， 共 栽树 多少 棵 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9497", "content": "用 拖拉机 耕 一块 地 ， 第一天 耕 了 这块 地 的 (1/5) ， 第 二 天 比 第一天 多 耕 了 这块 地 的 (1/10) ， 两天 共 耕 了 这块 地 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16837", "content": "70 的 40% = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15858", "content": "王 红 将 (4/5) 米 长 的 丝带 剪成 同样 长 的 8 段 ， 每 段 丝带 有 多长 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7052", "content": "轧路 机 的 前 滚筒 是 个 圆柱体 （ 如下 图 ） ， 宽度 为 1.5 米 ， 半径 0.5 米 ， 求 它 向前 滚动 2 周 ， 轧路 面积 应 = ？", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "503", "content": "3 个 (1/10) 与 多少 个 0.01 的 和 是 1 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19803", "content": "有 含盐 15% 的 盐水 20 千克 ， 要 使 盐水 含盐 20% ， 需要 加盐 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16541", "content": "小 明 想 买 《 汉语 词典 》 65 元 和 《 英汉词典 》 80 元 ， 恰逢 书店 “ 0.8 ” 销售 ， 他 能 省 下 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14694", "content": "一 次 数学 竞赛 中共 有 40 道 题 ， 丁 乐 做 对 了 (4/5) ， 张 青 做 对 的 道 数 是 丁 乐 的 (7/8) ， 张 青 做 错 了 几道 题 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1103", "content": "一 桶 油 的 (1/4) 是 12 千克 ， 它 的 (5/6) = 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19575", "content": "口袋 里 装有 8 个 乒乓球 ， 要 使 口袋 中 摸 出 白 球 的 可能性 是 (1/2) ， 口袋 里 应有 多少 个 白 球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18015", "content": "计算 ： 95 - 130 + 105 + 530 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2293", "content": "61 个 同学 排成 一行 ， 报数 后 ， 13 号 到 25 号 离开 队伍 ， 队伍 里 还有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18328", "content": "有 3 ㎏ 的 糖果 ， 每 (1/4) ㎏ 装 一 小袋 ， 可以 装 多少 袋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4296", "content": "一 种 课外读物 ， 出版社 按 定价 的 75% 发给 零售 书店 ， 书店 又 将 原来 定价 降低 10% 卖 给 读者 ， 如果 书店 每 本书 卖 9.6 元 ， 每 本书 书店 赢利 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18928", "content": "徒弟 每 小时 做 零件 48 个 ， 师傅 小时 做 的 是 徒弟 的 2 倍 ， 师傅 和 徒弟 每 小时 共 做 零件 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1923", "content": "操场 跑道 一圈 长 (2/5) 千米 ． 小 华 跑 4 圈 用 了 (2/15) 小时 ， 平均 每 小时 跑 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3048", "content": "春光 果园 有 梨树 10 棵 ， 桃树 比 梨树 多 (1/5) ． 这个 果园 有 桃树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21281", "content": "两个 桶 里 共 盛 水 40 斤 ， 若 把 第一桶 里 的 水 倒 7 斤 到 第 2 个 桶 里 ， 两个 桶 里 的 水 就 一样 多 ， 则 第一桶 有 多少 斤 水 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6912", "content": "一 份 稿件 4500 字 ， 小 明 录入 了 这份 稿件 的 (4/9) ， 还 剩 多少 字 没有 录入 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5044", "content": "一 个 长方体 的 体积 是 63 立方分米 ， 底 面积 是 18 平方分米 ， 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5820", "content": "4 与 3.5 的 和 除以 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10795", "content": "把 (7/8) 千克 的 白糖 分装 在 一些 小袋 里 ， 每个 小袋装 (1/8) 千克 ， 需要 多少 个 小 袋子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "927", "content": "计算 ： 2013.05 * 601 + 1550 * 201.305 + 201305 * 2.44 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "9405", "content": "小 东 在 计算 除法 时 ， 把 除数 4 写成 了 6 ， 结果 得到 的 商 是 48 ， 正确 的 商 应该 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14958", "content": "219 - 1.3 的 30 倍 ， 所得 的 差 是 一个 数 的 (3/4) ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20556", "content": "一 个数 的 (5/8) 是 75 ， 比 这个 数多 25% 的 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5391", "content": "育英 小学 高年级 有 学生 120 人 ， 中年级 有 学生 130 人 ， 低年级 有 学生 140 人 ， 中年级 人数 占 全校 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20804", "content": "甲 、 乙 两袋 糖 的 重量 比 是 4 ： 1 ， 从 甲 袋中 取出 2.6 千克 糖 放入 乙 袋 ， 这时 甲 、 乙 两袋 糖 的 重量 比 是 7 ： 5 ， 两袋 糖 一共 重 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2206", "content": "明明 有 42 张 邮票 ， 芳 芳 的 邮票 比 明明 少 14 张 ． 他们 一共 有 多少 张 邮票 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "382", "content": "某 数 的 3 倍 - 4.8 的 差 等于 4 个 0.3 连 加 的 和 ． 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22368", "content": "0.888 * 125 * 73 + 999 * 3 = ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "4416", "content": "李 阿姨 家 买来 一桶 金 龙 油 ， 一月份 用 去 这 桶 油 的 (7/20) ， 二 月份 用 去 这 桶 油 的 (2/5) ， 剩 (5/2) 千克 ． 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21511", "content": "三年级 4 个 班 的 同学 参加 跳绳 比赛 ， 一共 有 120 人 ． 如果 各 班 人数 相等 ， 每班 分 2 组 ， 平均 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "578", "content": "计算 56 / （ 14 - 6 ） 时 ， 要 先 算 多少 ， 再 算 多少 ， 结果 为 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16292", "content": "一 个 平行四边形 的 面积 是 4.5 平方分米 ， 底 = 多少 分 米 ， 它 的 高 才 是 1.5 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4448", "content": "计算 40 / 16 * 2.5 - 1 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16963", "content": "聪聪 一家 住 在 8 楼 ， 有 一天 这幢 楼 突然 停电 ， 他 只能 爬楼梯 ， 他 数 了 一下 ， 一共 走 了 98 级 台阶 ， 你 知道 每 层楼 有 多少级 台阶 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2636", "content": "一 桶 油 ， 吃 了 75 千克 后 ， 正好 剩下 这 桶 油 的 (2/5) ， 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2100", "content": "6 一班 有 学生 46 人 ， 其中 会 骑 自行车 的 17 人 ， 会 游泳 的 14 人 ， 既 会 骑车 又 会 游泳 的 4 人 ， 问 两样 都 不会 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14665", "content": "小 明 读 一本 科技 书 ， 已经 读 了 86 页 ； 剩下 的 每天 读 102 页 ， 还要 6 天才 可 读完 ． 问 这本 科技 书 一共 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13889", "content": "用 一台 织布机 织布 ， 4 小时 织布 22.4 米 ， 如果 再 增加 3 小时 ， 一共 可以 织布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20850", "content": "一 块 平行四边形 的 菜 地底 是 30 米 ， 高 是 15 米 ， 平均 每平方米 收 蔬菜 9 千克 ， 这块 地 可以 收 蔬菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4850", "content": "我市 去年 小学 毕业生 有 6000 人 ， 今年 比 去年 多 (1/20) ． 我市 今年 小学 毕业生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17284", "content": "一 条 长 1 千米 的 路 ， 已 铺 好 了 (3/5) 千米 ， 还 剩下 多少 千米 没有 铺 好 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16468", "content": "手帕 厂 原 计划 8 月份 生产 手帕 3280 打 ． 采用 新 的 生产 流水线 后 ， 生产 的 手帕 运走 了 2960 打 ， 还 剩 875 打 ． 比 原来 计划 增产 多少 打 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21653", "content": "李强 的 爸爸 今年 11 月 从 单位 取得 当 月工资 2100 元 ． 按照 新 的 个人所得税法 规定 ， 每月 的 个人收入 超过 1600 元 的 部分 ， 应 按照 5% 的 税率 征收 个人所得税 ． 李强 的 爸爸 这个 月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20992", "content": "村口 一个 池塘 边 要 栽树 ， 已知 这个 池塘 周长 287 米 ， 计划 栽 41 棵 柳树 ， 那么 相邻 的 两棵树 之间 应 相距 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13738", "content": "书店 进 了 195 本 练习册 ， 卖 了 2 天 还 剩 75 本 ． 平均 每天 卖 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18256", "content": "妈妈 去 买 一件 风衣 ， 用 去 所 带 钱 的 (1/3) ， 买 一条 围巾 又 用 了 35 元 ， 这时 还 剩 325 元 ． 妈妈 出门时 带 了 多少 钱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9469", "content": "一 个 正方体 骰子 的 6 个 面 中 有 3 面 绿色 ， 2 面 黄色 ， 1 面 红色 ， 若 将 此 骰子 掷 上 若干次 ， 红色 面朝 上 的 可能性 是 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20301", "content": "一 本 290 页 的 书 ， 看 了 4 天 ， 天 平均 每天 看 20 页 ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21289", "content": "计算 102 / [ （ 350 + 60 / 15 ） / 59 * 17 ] = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12917", "content": "一 个数 扩大 10 倍 后 比 原来 的 数 增加 了 30.78 ， 原 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8973", "content": "食堂 运 来 一批 花生油 ， 如果 每天 用 1.8 千克 ， 能 用 160 天 ． 如果 每天 节约 0.3 千克 ， 能 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6529", "content": "一 种 导弹 以 音速 （ 每秒 330 米 ） 前进 ， 已知 两架 飞机 相距 1500 米 同 向 飞行 ， 前面 一架 飞机 的 速度 是 每秒 210 米 ， 后面 一架 飞机 的 速度 是 每秒 180 米 ． 当 后面 的 飞机 发出 导弹 时 ， 多少 秒 可以 击中 前 一架 飞机 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "201", "content": "125 * 111 * 5 * 8 * 4 = ．", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "6385", "content": "(7/8) * 6.4 + 2.4 的 30% ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19393", "content": "甲 数 的 (1/5) 与 乙 数 的 (1/6) 相等 ， 甲 数 是 90 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "72", "content": "皮球 和 足球 一共 有 91 个 ， 皮球 和 足球 的 比 是 2 ： 5 ， 皮球 比 足球 少 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11835", "content": "把 22.5 平均 分成 15 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20118", "content": "一 堆 石子 有 78 吨 ， 每次 运 13 吨 ， 几次 运 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7917", "content": "一 根 电线 ， 用 去 32.87 米 ， 比 剩下 的 多 8.99 米 ， 这根 电线 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16986", "content": "妈妈 给 奶奶 寄 2500 元 ， 汇款 要 交 1% 的 汇费 ， 妈妈 一共 应交 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12816", "content": "一 个 长方形 的 周长 是 112 厘米 ， 长 和 宽 的 比 是 4 ： 3 ， 这个 长方形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "+", "/"], "difficulty": 1.0, "length": 23}
-{"question_id": "19207", "content": "甲 、 乙 二 人 共同完成 700 个 零件 ， 合作 5 天 后 还 剩下 50 个 没有 加工 ． 甲 每天 加工 70 个 ， 乙 每天 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22109", "content": "一 桶 汽油 用 去 (2/5) 后 ， 还 剩下 30 升 ． 这 桶 汽油 原来 有 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14383", "content": "小 丁丁 走 15 步 的 距离 是 12 米 ， 平均 每步 走 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1439", "content": "一 个 除法 算式 中 ， 除数 是 9 ， 商 是 6 ， 余数 是 4 ， 被除数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19081", "content": "小 玲 家 到 学校 的 路程 是 800 米 ． 今天 ， 她 从 家 到 学校 ， 已 行 了 全程 的 (7/10) ， 现在 小 玲 离家 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6386", "content": "百 峰 农场 养 了 16 只 鹅 ， 176 只 鸡 ． 鸡 的 只 数 是 鹅 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15074", "content": "学校 买来 一批 文具盒 作 奖品 ， 平均 发给 24 个 班 ， 每班 6 个 ， 还 剩下 16 个 ， 学校 一共 买来 多少 个 文具盒 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8764", "content": "李 华 读 一 本书 ， 第一天 读 了 全书 的 (1/5) ， 第 二 天 读 了 全书 的 (1/3) ， 这时 还 剩 350 页 ， 这 本书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13364", "content": "一 种 型号 的 电脑 现价 3200 元 ， 正好 是 原价 的 (4/5) ． 这种 型号 的 电脑 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21571", "content": "一 根 竹竿 长 8 米 ， 用 去 它 的 (1/4) 后 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "336", "content": "果园 里 有 1268 棵 果树 ， 其中 梨树 475 棵 ， 枣树 325 棵 ， 剩下 的 是 苹果树 ， 苹果树 有 多少 棵 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14780", "content": "一 列 火车 长 200 米 ， 以 每秒 5 米 的 速度 通过 一座 400 米 的 大桥 ． 从 车头 进 桥 到 车尾 离 桥 一共 需要 多长时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13472", "content": "某班 同学 做 纸鹤 ， 分 12 个 小组 ， 每组 有 4 人 ， 每人 能 做 5 个 ． 全班同学 一共 能 做 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6975", "content": "小 红 看 一本 故事书 ， 他 每天 看 6 页 ， 5 天 看 了 这 本书 的 (2/7) ， 这 本书 有 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23005", "content": "5 年 一班 有 50 名 学生 ， 在 一次 考试 中 ， 得 60 分 以上 的 有 90% ， 有 多少 人 不及格 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6816", "content": "一 批 零件 ， 甲 、 乙 两 人 单独 完成 ， 所 需 的 时间 之 比 是 3 ： 5 ． 现 两 人 合作 ， 完成 任务 时 ， 甲 比 乙 多 加工 30 个 ， 则 这 批 零件 有 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14791", "content": "六年级 3 班 男生 人数 是 女生 人数 的 (5/6) ， 男生 人数 是 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14079", "content": "小 明 有 45 元 ， 我 有 9 元 ， 小 明 的 钱 是 我 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1841", "content": "师徒 两 人 合 做 420 个 零件 ， 师傅 每 小时 做 32 个 ， 徒弟 每 小时 做 28 个 ， 两个 合 做 多少 小时 完成 任务 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13538", "content": "一 袋 重 2 千克 的 面粉 ， 全部 做 小笼包 可以 做 80 个 ， 全部 做 馒头 可以 做 40 个 ， 张 阿姨 用 这 袋 面粉 做 了 30 个 小笼包 ， 剩下 的 她 全部 做 馒头 ， 还 能 做 多少 个 馒头 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11425", "content": "一 辆 汽车 从 甲地 到 乙地 用 了 3 小时 ， 行 了 186 千米 ． 照 这样 的 速度 ， 从 乙地 出发 到 丙 地 用 了 4 小时 ． 求 乙丙 两地 之间 的 距离 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4956", "content": "小 芳 有 36 张 邮票 ， 小 华 的 邮票 比 小 芳 多 (1/4) ， 小 华 比 小 芳 多 多少 张 邮票 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10036", "content": "小 明 的 爸爸 月 收入 是 2500 元 ， 按规定 月 收入 超过 1600 元 的 部分 按 5% 征收 个人所得税 ． 小 明 的 爸爸 每个 月 要 交 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9908", "content": "一 项 工程 计划 投资 20 万元 ， 比 实际 少 投资 5 万元 ， 超过 计划 投资 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20885", "content": "一 个 生日蛋糕 ， 小 军 吃 了 (2/5) ， 比 妈妈 多 吃 了 这个 蛋糕 的 (1/10) ， 其余 的 爸爸 吃 了 ， 爸爸 吃 了 这个 蛋糕 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21554", "content": "水果 商店 运 来 30 筐 苹果 ， 每 筐 13 千克 ， 还 运 来 25 筐 梨 ， 每 筐 15 千克 ， 苹果 和 梨 一共 运 来 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20015", "content": "一 个 圆柱 的 体积 是 60 cm ^ 3 ， 底 面积 是 12 cm ^ 2 ， 它 的 高 = 多少 cm ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14558", "content": "五年级 全体同学 每人 带 2 个 不同 的 水果 去 慰问 解放军 叔叔 ， 全班 共 带 了 3 种 水果 ， 其中 苹果 40 个 ， 梨 32 个 ， 橘子 26 个 ， 那么 ， 带 梨 和 橘子 的 有 多少 个 同学 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19764", "content": "科技 小组 有 男同学 58 人 ， 女同学 44 人 ， 文艺 小组 的 人数 是 科技 小组 的 2 倍 ． 文艺 小组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9097", "content": "一 根 电话线 长 15 米 ， 用 去 (2/3) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8108", "content": "修 一条 2500 米 的 路 ， 18 天 修 了 这 条 路 的 (4/5) ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16911", "content": "一 个 圆形 的 花圃 ， 绕 一圈 是 180 米 ． 如果 沿着 花圃 周围 每隔 6 米 种 一棵 柳树 ， 每 两棵 柳树 之间 种 一棵 杨树 ， 可 种 多少 棵 杨树 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1472", "content": "某 工厂 有 一堆 煤 ， 用 去 (2/3) 吨 ， 还 剩 (4/5) 吨 ． 这 堆 煤 有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2276", "content": "5 一小 长假 期间 ， 星星 游乐园 第 二 天 的 门票 收入 比 第一天 增加 (1/6) ， 两天 门票 共 收入 2080 元 ， 问 第一天 的 门票 收入 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7953", "content": "学校 平整 操场 ， 35 人 3 小时 平整 1260 平方米 ， 照 这样 算 ， 40 人 平整 2880 平方米 ， 要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1529", "content": "一 个 养鱼 专业户 去年 养鱼 28 箱 ， 今年 养鱼 42 箱 ， 每箱 都 是 120 尾 ． 今年 比 去年 多 养 多少 尾 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21803", "content": "某 商店 进 一批 衣服 ， 每件 衣服 标价 200 元 ， 打 0.8 出售 后 还有 60% 的 盈利率 ， 那么 每件 衣服 的 进价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5295", "content": "国庆节 ， 皮鞋 店 促销 活动 ， 上午 卖出 皮鞋 99 双 ， 比 下午 多 卖 10% ， 下午 卖 了 多少 双 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4842", "content": "157 * (23/156) ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6161", "content": "一 根 木头 长 20 米 ， 把 它 平均 分成 5 段 ． 每 锯下 一段 需要 9 分钟 ， 锯 完 一共 要 花 多少 分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4176", "content": "一 张 长方形 的 纸 ， (1/7) 涂 红色 ， (4/7) 涂 蓝色 ， 没 涂色 的 占 这 张 纸 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17851", "content": "6 （ 2 ） 班 有 女生 24 人 ． 是 男生 人数 的 (3/4) ， 全班 一共 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18169", "content": "小 明 从 家 步行 到 学校 ， 每分钟 走 100 米 ， 需要 9 分钟 ． 家 到 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15115", "content": "五年级 今天 的 出勤率 是 96% ， 有 2 人 请 病假 ， 该班 今天 的 出勤 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7184", "content": "小 明 买 了 一本 故事书 ． 他 第一天 看 了 这 本书 的 (1/8) ， 第 二 天 看 了 这 本书 的 (3/8) ， 还 剩 这 本书 的 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2505", "content": "一 项 工程 由 甲队 独 做 40 天 完成 ， 由 乙 队 独 做 60 天 完成 ． 两队 合 做 10 天 ， 还 剩下 这项 工程 的 几分 之 几 没有 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2967", "content": "学校 维修 跑道 ， 计划 费用 4 万元 ， 实际 比 计划 节约 15% ， 实际 费用 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22138", "content": "64 个 0.2 / 0.6 与 1.4 的 和 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1840", "content": "12 棵 柳树 排成 一排 ， 在 每 两棵 柳树 中间 种 3 棵 桃树 ， 共 种 多少 棵 桃树 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11440", "content": "花坛 里 有 万年 红 23 株 ， 蒲公英 22 株 ， 这 两种 花 占 花 总数 的 (3/10) ． 花坛 里 共有 多少 株 花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18440", "content": "甲乙 两车 汽车 同时 从 a 地 开往 b 地 ， 当 甲 车行 了 全程 的 (1/3) 时 ， 乙 车 正好 行 了 60 千米 ； 当 甲 车 到达 b 地 时 ， 乙 车行 了 全程 的 (3/5) ， ab 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12459", "content": "某种 品牌 的 电脑 每 台 售价 5400 元 ， 若 降价 205 后 销售 ， 仍 可 获利 120 元 ， 则 该 品牌 电脑 的 进价 为 每 台 多少 元 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18185", "content": "学校 有 男生 540 人 ， 比 女生 人数 的 (5/6) 少 60 人 ， 学校 有 女生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13380", "content": "从 810 里 连续 减去 多少 个 9 ， 才 等于 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22351", "content": "蜡烛 每分钟 燃烧 掉 的 长度 一定 ， 点火 8 分钟 后 ， 蜡烛 的 长度 是 12 厘米 ， 18 分钟 后 长度 是 7 厘米 ， 蜡烛 原来 的 长度 = 多少 厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16287", "content": "小 马虎 上学 忘 了 带 书包 ， 爸爸 发现 后 立即 骑车去 追 他 ， 把 书包 交给 他 后 立即 回家 ． 小 马虎 接到 书包 后 又 走 了 10 分钟 到达 学校 ， 这时 爸爸 也 刚好 到 家 ． 已知 爸爸 的 速度 是 小 马虎 速度 的 4 倍 ， 问 ： 小 马虎 从 家 到 学校 共用 多少 分钟 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1032", "content": "25.7 - 1.76 / 0.8 的 商 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22026", "content": "一 根 绳子 ， 第一次 剪 去 全长 的 (1/3) ， 第 二 次 剪 去 余下 绳子 的 (4/5) ， 两次 共 剪 去 26 米 ， 这根 绳子 全长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1340", "content": "一 种 稻谷 的 出米率 是 85% ， 如果 有 2000 千克 稻谷 ， 出 糠皮 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19777", "content": "漫画书 每 本 5 元 ， 童话故事 书 每 本 15 元 ， 四年级 一班 有 38 人 想 每个 人 都 订购 一本 漫画书 和 一本 童话故事 书 ， 那么 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22274", "content": "一 个数 的 (1/4) 是 60 ， 这个 数 的 (3/8) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7923", "content": "一 根 铁丝 第一次 用 去 全长 的 10% ， 第 二 次 用 去 全长 的 25% ， 还 剩 全长 的 多少 %", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7222", "content": "修路 队 铺 一条 公路 ， 4 天 铺 了 全长 的 (2/5) ， 剩下 还要 几天 铺 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16654", "content": "一 个 修路 队 ， 修筑 一段 公路 ， 前 3 天 修 了 360 米 ， 后 5 天 修筑 150 米 ， 这个 修路 队 平均 每天 修筑公路 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11784", "content": "正德 学校 五年级 有 故事书 200 本 ， 科技 书 的 本 数 是 故事书 的 (3/5) 、 是 文艺 书 的 (2/3) ， 文艺 书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15378", "content": "学校 买来 126 米 长 的 绳子 ， 先剪 下 10.5 米 做 了 5 根 同样 长 的 跳绳 ， 剩下 的 绳子 还 可以 做 多少 根 同样 长 的 跳绳 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15249", "content": "松树 比 杨树 少 45 棵 ， 杨树 的 棵 数 比 松树 多 (3/7) ， 松树 和 杨树 一共 有 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12670", "content": "9 * ( (2/15) - (1/12) ) - 0.2 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10646", "content": "40 个人 采集 了 900 千克 茶叶 ， 如果 每 篮装 15 千克 ， 还 差 25 个 篮子 ， 原来 有 几个 篮子 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7375", "content": "甲 数 是 685 ， 乙 数 是 523 ， 甲 数 减去 多少 ， 就 和 乙 数 相等 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18579", "content": "芳 芳 要 买 8 枝 9 元 的 彩笔 ， 付给 阿姨 100 元 ， 应 找回 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11485", "content": "新城 水泥厂 今年 3 月份 生产 水泥 2700 吨 ， 比 计划 超产 450 吨 ， 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5032", "content": "有 一堆 煤 ， 第一天 运走 全部 的 (2/5) ， 第 二 天 运走 的 比 第一天 多 运 2 吨 ， 这时 还 剩下 12 吨 ． 这 堆 煤 原有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17375", "content": "(1/8) + (5/6) 的 和 乘 一个 数 ， 等于 (3/4) ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3364", "content": "一 只 水箱 里 装 了 3 吨 水 ， 占 这 只 水箱 总 容量 的 (3/4) ， 这 只 水箱 能 装 多少 吨 水 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5545", "content": "光明 小学 三年级 有 2 个 班 ， 每个 班 有 4 个 学习 小组 ， 现在 有 64 本 课外书 要 分 到 学习 小组 中 ， 平均 每个 小组 能 分 到 几本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22804", "content": "一 个 梯形 的 面积 是 9.6 dm ^ 2 ， 上 底 是 5 dm ， 高 是 3 dm ， 下 底 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7533", "content": "甲 、 乙 两 人 共 完成 一批 零件 ， 甲 、 乙 工作效率 比 是 5 ： 6 ， 完成 任务 时 甲 做 了 350 个 ， 这 批 零件 共 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12398", "content": "某 筑路 队 修 了 一条 500 米 长 的 公路 ， 第一天 修 了 全长 的 30% ， 第 二 天 修 了 全长 的 35% ， 两天 共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15375", "content": "一 种 衣服 原价 150 元 ， 降价 后 销量 增加 了 50% ， 营业 收入 增加 了 (1/5) ， 这种 衣服 降价 了 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8439", "content": "工厂 生产 一批 手表 ， 计划 每天 生产 300 只 ， 5 天 完成 ， 两天 后 已经 生产 600 只 ， 还 剩 多少 只 没有 生产 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13408", "content": "码头 上 有 780 吨 黄沙 ， 如果 用 载重 5 吨 的 卡车 运 ， 6 辆 卡车 要 多少 次 才能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22990", "content": "学校 买来 30 套 桌椅 ， 桌子 的 单价 是 45 元 ， 椅子 的 单价 是 18 元 ， 学校 买 桌椅 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7550", "content": "果品 店 运 来 14 筐 梨 ， 每 筐 35 千克 ， 还 运 来 16 筐 苹果 ， 每 筐 30 千克 ， 运 来 的 梨 比 苹果 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6214", "content": "一 本书 有 162 页 ， 第一天 小 明 看 了 35 页 ， 第 二 天 看 了 45 页 ， 两天 后 剩下 多少 页 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5467", "content": "某 商场 举行 优惠 大 酬宾 活动 ， 一件 商品 打 0.8 后 150 元 出售 ， 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12177", "content": "某 服装 商场 老板 为了 促销 ， 先 将 所有 商品 提价 30% ， 而后 挂出 “ 全场 商品 8 折 优惠 （ 按 标价 的 80% 算 ） ， 数量 有限 ， 欲购从速 ” 牌子 ． 这样 原价 90 元 的 服装 ， 现在 实际 售价 = 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13403", "content": "妈妈 买 一条 裤子 和 6 双 袜子 一共 花 了 128 元 ， 一条 裤子 98 元 ， 一双 袜子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15495", "content": "一 条 路 已修 24 千米 ， 还 剩 全长 的 (2/5) ． 这 条 路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19422", "content": "一 桶 水 的 (1/2) 是 20 千克 ． 这 桶 水 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4185", "content": "某 工厂 运进 一批 煤 ， 原 计划 每天 烧 7 吨 ， 可以 烧 150 天 ． 由于 改进 了 烧煤 技术 ， 实际 每天 烧 6 吨 ， 可以 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6976", "content": "果园 里 栽 了 125 行 桃树 、 50 行 苹果树 ． 每行 都 栽 了 8 棵 ． 你 知道 苹果树 比 桃树 少 栽 了 多少 棵 ？ 你 认为 怎样 计算 比较 简便 ？ 和 大家 交流 一下 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20410", "content": "买 一张 办公桌 需要 480 元 ， 比 买 10 把 椅子 贵 30 元 ． 一把 椅子 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22146", "content": "一 个 三角形 的 面积 是 8.4 平方分米 ， 底 长 4 分 米 ， 与 它 等 底 等 积 的 平行四边形 所 对应 的 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8480", "content": "一 件 商品 0.8 出售 ， 便宜 了 84 元 ， 这件 商品 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "949", "content": "一 个 公司 去年 平均 每月 营业额 20 万元 ， 按照 营业额 的 10% 纳税 ． 这个 公司 去年 的 实际收入 = 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12389", "content": "0.25 = 12 / 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20372", "content": "容 村 小学 少先队员 积极 捐款 支援灾区 ， 三年级 捐款 1500 元 比 六年级 少 捐 (1/5) ， 六年级 学生 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1101", "content": "今年 土豆 每 500 克 1.8 元 ， 比 去年 增长 0.8 元 ， 比 去年 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12896", "content": "小 萍 高考 成绩 中 ， 数学 考 了 125 分 ， 语文 考 了 119 分 ， 文科 综合 考 了 256 分 ， 若 要 使 数学 、 语文 、 文科 综合 及 英语 的 总分 达到 南开大学 的 文科 分数线 584 分 ， 那么 英语 至少 要 考 多少 分 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14081", "content": "学校 举行 100 米 跑 比赛 ， 小兵 用 了 17 秒 ， 小强 比 小兵 快 2 秒 ， 小强 用 了 多少 秒 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21489", "content": "一 个数 的 20 倍 是 720 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "518", "content": "香皂 厂 要 生产 一批 香皂 ， 已经 生产 了 653 块 ， 再生产 247 块 就 能 完成 任务 ， 这 批 香皂 有 多少 块 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3642", "content": "某 学校 有 学生 1500 人 ， 出勤 多少 人 时 出勤率 正好 是 98% ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14109", "content": "一 列 火车 从 甲 站 开往 乙 站 ， 行 全程 的 (5/7) ， 还 距 乙 站 有 162 千米 ． 这 列 火车 已经 行 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20053", "content": "我们 有 5 名 同学 为 2008 年 奥运会 画 一幅 图 ． 每 名 同学 完成 组 图 的 (2/13) ， 他们 一共 完成 了 组 图 的 多少 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10742", "content": "水 是 由 氢 和 氧 按 1 ： 8 的 重量 比 化合 而 成 的 ， 81 千克 水中 ， 含氧 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4926", "content": "把 一根 铁丝 平均 剪成 15 段 ， 用 去 5 段 ， 剩下 的 占 全长 的 几分 之 几 （ 用 最 简分数 表示 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9868", "content": "光明 小学 买 12 把 椅子 用 去 288 元 ， 又 买来 同样 的 椅子 36 把 ， 学校 买 椅子 共用 去 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8721", "content": "客车 、 货车 两车 同时 从 甲 、 乙 两城 相对 开出 ， 客车 每 小时 行 60 千米 ， 是 货车 速度 的 (5/6) ， 两车 开出 后 6 小时 相遇 ． 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14547", "content": "食堂 运 来 8 筐 青菜 ， 每 筐 重 12 千克 ． 吃掉 26 千克 后 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "952", "content": "某 洗染 厂 ， 上半年 计划 用水 500 吨 ， 实际 用水 488 吨 ， 节约用水 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2252", "content": "小 明 打算 16 天 看 完 一本 故事书 ， 平均 每天 看 15 页 ． 现在 要 10 天 看 完 ， 平均 每天 应 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4318", "content": "某 钢铁厂 今年 的 产量比 去年 多 (1/10) ， 去年 这个 厂 产 钢 850 万吨 ， 今年 产 钢 多少 万吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10228", "content": "0.04 扩大 到 原 数 的 多少倍 是 4 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19220", "content": "学校 买来 一些 彩笔 ， 平均 分给 16 个 班 ， 每班 分 得 40 盒 ， 还 剩 48 盒 ． 学校 买来 多少 盒 彩笔 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4139", "content": "一 艘 船 逆流而上 ， 船速 为 每 小时 32 千米 ， 水速 是 每 小时 2 千米 ， 这 艘 船 4 小时 能 行 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19277", "content": "一 个 服装厂 要 生产 1400 套 西服 ， 前 5 天 平均 每天 生产 80 套 ， 其余 的 要求 4 天 完成 ， 平均 每天 生产 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7427", "content": "一 个 平行四边形 高 是 18 cm ， 面积 是 9 cm ^ 2 ， 它 的 底 = 多少 cm ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2436", "content": "(10/13) 的 3 倍 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2759", "content": "10 与 90 的 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14033", "content": "六年级 要 栽 140 棵 树 ， 已经 栽 了 (5/7) ， 还有 多少 棵 没 栽 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20411", "content": "小 丽 把 4000 元 人民币 存入 银行 ， 存期 5 年 ， 年利率 是 4.95% ， 到期 需 支付 3% 的 利息税 ， 问 到 到期 后 她 可以 拿到 税后 利息 = ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13638", "content": "把 5 克 盐 加入 浓度 为 20% 的 20 克 盐水 中 ， 此时 盐水 的 浓度 为 多少 % ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11739", "content": "某班 共 40 人 ， 其中 25 人 喜爱 篮球运动 ， 20 人 喜爱 乒乓球 运动 ， 8 人 对 这两项 都 不 喜爱 ， 则 既 喜爱 篮球运动 又 喜爱 乒乓球 运动 的 人数 为 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18929", "content": "一 根 电线 ， 第一次 用 去 全长 的 12.5% ， 第 二 次 用 去 23 米 ， 这时 已 用 的 和 没用 的 电线 的 长度 比 是 4 ： 5 ， 这根 电线 原来 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3673", "content": "食堂 运 来 大米 200 千克 ， 是 运 来 面粉 的 (3/4) ， 运 来 大米 和 面粉 共 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9692", "content": "有 一块 平行四边形 菜地 ， 底 是 27.6 米 ， 高 是 15 米 ， 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12543", "content": "计算 65 - 13 * 2 时 ， 应 先 算 多少 法 ， 再 算 多少 ， 计算结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9755", "content": "妈妈 去 商场 买 裤子 花 了 45 元 ， 占 所 花钱 数 的 (1/4) ， 买 裙子 用 了 所 花钱 数 的 (4/15) ． 买 裙子 花 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14287", "content": "一 桶 煤油 重 16 千克 ， 用 去 (3/4) ． 用 去 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3449", "content": "赵 敏 的 妈妈 是 教师 ， 1976 年 4 月 8 日 出生 ， 按 国家 规定 55 岁 退休 ， 她 应 在 哪一年 退休 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1781", "content": "学校 植树 ， 第一天 完成 了 计划 的 (3/8) ， 第 二 天 完成 了 计划 的 (5/12) ， 第 3 天 植树 55 棵 ， 结果 超过 计划 的 (1/4) ， 学校 计划 植树 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16369", "content": "光明 小学 植树 ， 一天 就 植树 160 棵 ， 比 原 计划 多 植 了 (1/7) ， 原 计划 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5655", "content": "新兴 饲养场 ， 养 了 24 只 羊 ， 一天 吃 草 72 千克 ， 照 这样 计算 ， 576 千克 草 可 供 这些 羊 吃 多少 天 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3539", "content": "六年级 一个 劳动 小组 要 帮助 校办 厂 糊 2640 个 纸盒 ， 实际 3 天 就 糊 了 240 个 ． 照 这样 计算 ， 剩下 的 纸盒 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22548", "content": "小 丽 (2/3) 小时 走 了 4 千米 ， 她 走 1 千米 用 了 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12636", "content": "378 - 71 ， 连续 减 多少 次 ， 还 余下 23 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22769", "content": "红星 水泥厂 去年 计划 生产 水泥 16 万吨 ， 实际上 半年 生产 8.6 万吨 ， 下半年 生产 9.8 万吨 ， 超额完成 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10144", "content": "一 个数 的 (1/6) 正好 是 24 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12934", "content": "一 个数 的 40% 与 56 的 (5/8) 相等 ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "568", "content": "一 个数 的 2.5 倍 是 62.5 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18101", "content": "一 种 书包 打 0.75 后 是 60 元 ， 这个 书包 比 原价 降 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12034", "content": "一 台 微波炉 按 0.75 出售 ， 便宜 了 150 元 ， 这 台 微波炉 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2622", "content": "食堂 原有 大米 2500 千克 ， 又 买来 18 袋 大米 ， 每 袋 80 千克 ． 现在 一共 有 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23035", "content": "大 瓶子 装 饮料 (3/5) 千克 ， 比 小 瓶子 多 装 (1/8) 千克 ． 一只 大 瓶子 和 一只 小 瓶子 共 装 饮料 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11864", "content": "一 套 西服 打 0.8 后 是 320 元 ， 这 套 西服 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "743", "content": "一 种 玩具 现在 每件 60 元 ， 比 原来 少 20 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19509", "content": "加工 800 个 零件 ， 3 小时 加工 它 的 (3/5) ， 照 这样 余下 的 还要 加工 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3244", "content": "桌子 的 价钱 和 椅子 价钱 的 比 是 3 ： 1 ， 买 椅子 和 桌子 共 花 2680 元 ， 椅子 花 去 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4691", "content": "一 个数 的 (3/7) 是 27 ， 它 的 (1/9) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22329", "content": "育苗 小学 有 学生 750 人 ， 男生 占 全校 人数 的 (2/5) ， 男生 比 女生 少 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20718", "content": "草地 上 有 小山羊 9 只 ， 小绵羊 比 小山羊 的 4 倍 多 5 只 ， 小绵羊 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17809", "content": "有 18 个 小朋友 排成 一路 纵队 ， 每 两个 小朋友 之间 相距 1 米 ， 这 路 纵队 全长 大约 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15595", "content": "黄 松 按 0.85 优惠 的 价格 买 了 4 张 游乐园 门票 ， 一 共用 去 340 元 ． 每张 游乐园 门票 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10586", "content": "学校 开展 植树造林 活动 ， 三年级 植 了 140 棵 树 ， 比 五年级 少 植 760 棵 ， 四年级 植 的 棵 数 正好 是 五年级 的 4 倍 ， 四年级 植 了 多少 棵 树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4027", "content": "同学 们 做操 ． 小 雷 站 在 左 起 第 3 行 ， 右 起 第 8 行 ； 从 前面 数 是 第 6 个 ， 从 后边 数 是 第 7 个 ． 如果 每行 的 人数 一样 多 ， 共有 多少 名 同学 做操 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "772", "content": "在 一个 周长 是 42 米 的 圆形 花园 周围 ， 每隔 2 米 放 一 盆花 ， 一共 可 放 多少 盆花 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9520", "content": "一 双 皮鞋 原价 200 元 ， 现 因 换季 促销 打 0.9 出售 ， 买 这 双 皮鞋 可 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10000", "content": "水果店 运 来 20 箱 梨 ， 每箱 25 千克 ． 卖出 315 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18089", "content": "“ 6 一 ” 儿童节 ， 学校 准备 在 长 50 米 的 教学大楼 的 顶部 前沿 从头到尾 每隔 5 米 插 上 一面 彩旗 ， 需要 买 多少 面 彩旗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20926", "content": "幸福村 今年 实际 造林 200 公顷 ， 比 计划 多 造林 40 公顷 ， 实际 造林 比 原 计划 增加 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22810", "content": "张 大伯 养鸡 385 只 ， 养鸭 226 只 ， 养 鹅 108 只 ， 养 的 鸡 比 养 的 鹅 与 鸭 的 总数 多 多少 只 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20987", "content": "学校 买 了 12 个 足球 和 8 个 篮球 ， 一共 付 了 1460 元 ． 已知 每个 足球 65 元 ， 每个 篮球 比 每个 足球 贵 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5338", "content": "从 甲地 到 乙地 ， 小 明 坐 汽车 要 用 4 小时 ， 每 小时 行 30 千米 ． 骑 自行车 要 用 6 小时 ， 骑 自行车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15321", "content": "一 种 商品 先 提价 20% ， 再 降价 10% ， 这时 的 价格比 原来 高 160 元 ， 原价 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15398", "content": "一 个数 的 (5/21) 是 (25/84) ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6124", "content": "果品 公司 一共 收购 苹果 42 吨 ， 先 运走 22 吨 ． 剩下 的 用 载重 用 4 吨 的 卡车 一次 运 完 ． 需要 多少 辆 这样 的 卡车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6763", "content": "在 马路 一侧 ， 从头到尾 每隔 7 米 种 一棵树 ， 一共 种 了 20 棵 树 ， 这 条 马路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10149", "content": "小强 从 学校 到 少年宫 用 了 15 分钟 ， 他 每分钟 走 80 米 ， 学校 距离 少年宫 有 多 远 ？ 本题 是 求 什么 ？ （ ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22014", "content": "人 骑 自行车 的 速度 大约 是 15 千米 / 时 ， 相当于 小汽车 速度 的 (1/5) ， 小汽车 速度 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18116", "content": "我们 班 有 6 个 小组 ， 每个 小组 5 人 ． 再 加上 3 个 老师 ， 一共 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16034", "content": "昆虫 飞行 时 经常 振动 翅膀 ． 蜜蜂 每秒 能振动 翅膀 236 次 ， 蝗虫 每秒 振动 次数 比 蜜蜂 少 (109/118) ． 蝗虫 每秒 能振动 多少 次 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17586", "content": "化肥厂 用 大 、 小 两辆 汽车 运 47 吨 化肥 ， 大 汽车 运 了 8 次 ， 小汽车 运 了 6 次 正好 运 完 ， 大 汽车 每次 运 4 吨 ， 小汽车 每次 运 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14189", "content": "白兔 和 黑 兔 只 数 的 比 是 5 ： 6 ， 则 黑 兔 的 只 数 是 白兔 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3907", "content": "学校 礼堂 有 20 排 空白 的 座位 ， 三年级 有 140 人 ， 老师 安排 每 10 人 坐 一排 ， 礼堂 里 还 空 着 几排 座位 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17447", "content": "有 98 个 玩具 ， 送给 幼儿园 29 个 ， 剩下 的 每 3 个 装 一盒 ， 一共 要 装 多少 盒 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16167", "content": "图书 角 原来 有 一些 故事书 ， 借给 3 个 小组 ， 每组 18 本 ， 还 剩 35 本 ． 原来 有 多少 本 故事书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11724", "content": "声音 在 水中 大约 每秒 传播 1440 米 ， 比 在 空气 中 传播速度 的 5 倍 少 260 米 ， 声音 在 空气 中 每秒 大约 传播 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9231", "content": "一 个 热水瓶 售价 35 元 ， 比 原价 降低 了 5 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13068", "content": "食堂 买来 3 筐 黄瓜 ， 每 筐 25 千克 ； 又 买来 豆角 36 千克 ． 黄瓜 比 豆角 多 买 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4240", "content": "在 摸奖 箱 里 放入 黄 球 和 白 球 ． 已经 放进去 了 6 个 黄 球 ， 要 设计 一个 摸 到 黄 球 可能性 是 4% 的 摸奖 活动 ， 要 往 箱 里 放进 多少 个 白 球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1477", "content": "四年级 一般 有 48 人 ， 下午 自习课 后 ， 做 完 语文 作业 的 37 人 ， 做 完 数学 作业 的 有 42 人 ， 没有 人 两 科 作业 都 没 做 完 ． 语文 、 数学 作业 都 做 完 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11158", "content": "伟业 西服 厂 现在 每年 的 生产能力 是 1500 万套 ， 原先 的 生产能力 是 现在 的 (5/6) ， 原先 每年 生产 西服 多少 万套 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9100", "content": "两个 因数 的 积 是 2.6 ， 若 将 其中 一个 因数 扩大 2 倍 ， 另 一个 因数 扩大 5 倍 ， 那么 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "571", "content": "小 明 读 一 本书 ， 第一天 读 了 全书 的 20% ， 第 二 天 读 了 28 页 ， 这时 读 的 页数 与 剩下 页数 的 比 是 5 ： 6 ， 小 明 读 的 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5183", "content": "3 里面 包含 有 多少 个 (1/3) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15578", "content": "一 盒 铅笔 平均 分给 5 个 小朋友 或 6 个 小朋友 ， 都 多出 1 支 ， 这 盒 铅 笑 至少 有 多少 支 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15194", "content": "三年级 同学 到 菜园 收 白菜 ， 分成 4 组 ， 每组 11 人 ， 平均 每人 收 45 千克 ． 一共 收 白菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11811", "content": "第 二 牧场 养 小猪 130 头 ， 是 大 猪头 数 的 5 倍 ， 大 猪 有 多少 头 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8641", "content": "一 本书 108 页 ， 小 华 开始 每天 看 6 页 ， 看 了 8 天 ， 剩下 的 要 在 5 天 内 看 完 ， 剩下 的 每天 应 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21980", "content": "从 522 里 连续 减去 29 ， 减 多少 次 ， 结果 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1353", "content": "光明 小学 去年 有 篮球 24 个 ， 今年 新 买 了 6 个 ， 今年 比 去年 增加 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11658", "content": "一 个 养牛 专业户 ， 养 肉牛 60 头 ， 养 奶牛 80 头 ， 养 的 肉牛 比 奶牛 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2860", "content": "同学 们 在 操场上 活动 ， 他们 分成 5 队 ， 每队 分 3 组 ， 每组 有 12 人 ， 操场上 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19781", "content": "6 （ 1 ） 班 有 男生 36 人 ， 女 人数 是 男生 的 (5/6) ， 这个 班 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18593", "content": "世界 第 二 大河 是 南美洲 的 亚马逊河 ， 全长 6500 千米 ， 我国 的 长江 是 世界 第 3 大河 ， 全长 仅 比 亚马逊河 短 3% ， 长江 约 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4653", "content": "汽车 从 甲地 到 乙地 ， 用 了 两天 时间 ． 第一天 行 了 全程 的 (3/5) 还 多 96 千米 ， 第 二 天 行 的 是 第一天 的 (1/3) ． 甲乙 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "5331", "content": "一 堆 煤 ， 用 去 了 20 吨 ， 余下 的 是 用 去 的 25% ， 这 一堆 煤 一共 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18322", "content": "一 批 水果 ， 第一 夫 卖出 (1/3) ， 还 剩 192 千克 ， 第一天 卖出 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5621", "content": "某 小学 五年级 学生 人数 是 四年级 学生 人数 的 125% ， 五年级 学生 人数 比 六年级 学生 人数 少 25% ， 六年级 共有 学生 400 人 ， 问 四年级 有 多少 个 学生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17340", "content": "鸭 有 210 只 ， 鸭 的 只 数 和 鸡 与 鸭 的 总 只 数 的 比 是 5 ： 7 ． 鸡 有 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17966", "content": "修路 队 要 修 一条 长 4200 米 的 公路 ， 计划 7 天 修 完 ， 实际 每天 修 700 米 ， 实际 比 计划 提前 几天 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13730", "content": "一 种 双层 列车 一共 有 15 节车厢 ， 每 节车厢 的 上层 有 100 个 座位 ， 下层 有 78 个 座位 ． 这种 双层 列车 每次 可 载客 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13252", "content": "把 一个 棱 长 是 8 分 米 的 正方体 切成 2 个 大小 相同 的 长方体 表面积 增加 多少 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4879", "content": "玩具厂 生产 一批 玩具 4800 件 ， 计划 15 天 完成 ， 实际 12 天 就 完成 ， 实际 每天 比 计划 每天 多 生产 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5396", "content": "百货商店 微波炉 505 元 ， 电磁炉 320 元 ， 妈妈 买来 一个 微波炉 和 电磁炉 ， 一共 要 花 多少 元 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15928", "content": "某 工程队 修路 ， 已经 修 了 全长 的 (1/3) ， 还 剩 400 米 没有 修 ， 问 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22185", "content": "“ 十一 ” 黄金周 期间 ， 新一佳 超市 有 1000 台 彩电 待售 ， 7 天 后 还 剩下 160 台 没有 出售 ． 平均 每天 售出 彩电 多少 台 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "508", "content": "一 份 稿件 ， 小 明 每天 可 录入 这份 稿件 的 (1/12) ， 小 红 每天 能 录入 这份 稿件 的 (1/18) ． 他们 各 录入 了 3 天 ， 一共 录入 了 这份 稿件 的 几分 之 几 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22734", "content": "旅游 爱好者 李 波 从 山脚 出发 ， 翻过 山顶 ， 到达 山 另一侧 的 灵 泉 寺 ， 共 行 24 千米 ， 用 了 6 小时 ， 他 上山 每 小时 行 3 千米 ， 下山 速度 为 每 小时 5 千米 ， 如果 上山 和 下山 速度 不变 ， 从 灵 泉 寺 返回 出发地 需 多长时间 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22573", "content": "商店 为 某 鞋厂 代销 200 双 鞋 ， 代销 费用 为 销售总额 的 15% ． 全部 销售 完 后 ， 商店 向 鞋厂 交付 43860 元 ． 这 批 鞋 每 双 售价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20967", "content": "甲 数 的 100 倍 等于 乙 数 的 (1/8) ． 如果 甲 数 是 12.5 ， 那么 乙 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "250", "content": "小 芳 做 数学 作业 用 了 (2/5) 小时 ， 比 语文 作业 少 用 (1/4) 小时 ， 小 芳 做 这两项 作业 一 共用 了 多少 时间 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3026", "content": "梅花鹿 最快 每 小时 能 跑 90 千米 ， 比 猎豹 最快 速度 的 (1/2) 少 20 千米 ． 猎豹 最快 每 小时 能 跑 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4831", "content": "学校 要 植树 500 棵 ， 把 植树 任务 按 2 ： 3 分给 5 、 6 两个 年级 ． 实际 植树 时 ， 六年级 超过 原 分配任务 的 (2/5) ， 六年级 实际 植树 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4628", "content": "红领巾 小学 买来 皮球 380 个 ， 足球 70 个 ， 课外活动 时 借出去 423 个 ， 现在 学校 还 剩 多少 个 球 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14237", "content": "一 列 火车 从 甲地 开往 乙地 ， 已经 行 了 全程 的 (3/5) ， 距离 乙地 还有 245 千米 ， 甲乙 两地 之间 的 距离 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17659", "content": "甲 读 一 本书 ， 第一天 读 了 全书 总 页数 的 20% ， 第 二 天 比 第一天 少 读 了 30 页 ， 两天 正好 读 了 全书 总 页 的 35% ． 全书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8157", "content": "7.68 / 0.34 得到 的 整数 的 商 是 22 时 ， 余数 应 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6308", "content": "水果店 运 来 8 筐 苹果 ， 每 筐 重 25 千克 ， 运 来 梨 240 千克 ， 运 来 的 梨 比 苹果 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8333", "content": "两个 小伙伴 称 体重 ， 小强 重 25.7 千克 ， 小 芳 比 小强 轻 1.04 千克 ， 小 芳 的 体重 = 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10459", "content": "亮亮的 体重 是 32 千克 ， 妈妈 的 体重 比 亮亮的 2 倍 少 7 千克 ． 妈妈 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "30", "content": "李 东 拿 5 元 钱 买 文具 ． 他 买 铅笔 已 用 去 1.5 元 ， 剩下 的 钱 买 练习簿 ， 每 本 0.35 元 ． 他 可以 买 多少 本 练习簿 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8114", "content": "某 厂 计划 3 月份 生产 电视机 400 台 ， 实际上 半个 月 生产 了 250 台 ， 下 半个 月 生产 了 230 台 ， 实际 超额完成 计划 的 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5167", "content": "一 个 圆形 花圃 的 面积 是 (4/5) 公顷 ， 里面 种 了 3 种 不同 的 花 ． 其中 牡丹 占 总面积 的 (2/5) ， 百合 占 总面积 的 (1/20) ， 其余 是 玫瑰 ． 玫瑰 占 总面积 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2395", "content": "甲 数 是 108 ， 是 乙 数 的 3 倍 ． 甲 、 乙 两 数 的 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6826", "content": "杨 大伯 去 农机 商场 购买 一辆 农机 车 ， 原价 6489 元 ， 恰逢 “ 5 • 一 ” 劳动节 ， 商场 搞 促销 活动 ， 每辆车 降价 650 元 ． 他 还 可以 拿到 498 元 的 农机 补贴 ， 你 能 算 出 杨 大伯 实际 花 了 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19191", "content": "一 个数 的 75% 是 150 ， 这个 数 的 (2/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15927", "content": "水果店 运进 水果 320 筐 ， 卖出 了 (3/4) ， 卖出 了 多少 筐 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8656", "content": "一 列 火车 上 有 旅客 985 名 ， 到 了 某 站 后 ， 先 有 85 名 旅客 下车 ， 后 又 有 126 名 旅客 上车 ， 现在 火车 上 有 多少 名 旅客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4817", "content": "5 一 假期 ， 小 明 一家 3 口 开车 去 杭州 游玩 ． 去 时 ， 妈妈 把 车 开 得 很 慢 ， 每 小时 行 80 千米 ， 行驶 了 5 小时 ， 返回 时 我们 归心似箭 ， 爸爸 开车 的 速度 提高 了 ， 少 用 了 1 小时 ． 返回 时 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9707", "content": "体育馆 共有 6 个 区 ， 每个 区 的 座位数 都 差不多 ， a 区 有 12 排 ， 每排 有 48 个 座 ， 这个 体育馆 大约 能 容纳 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10323", "content": "玩具厂 计划 5 月份 生产 80 件 玩具 ， 上旬 生产 了 25% ， 中旬 生产 了 30% ， 上旬 和 中旬 一共 生产 了 多少 件 玩具 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3068", "content": "一 个 装满 花生油 的 桶 ， 连 桶 共 重 16 千克 ， 用 去 (3/5) 的 油 后 ， 连 桶 共 重 8.5 千克 ， 那么 空桶 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13767", "content": "解放军 战士 进行 野营训练 ， 共 行 7.35 千米 ， 前 0.5 小时 走 山路 ， 平均 每 小时 行 3 千米 ， 后来 走 平 路 ， 平均 每 小时 行 4.5 千米 ． 他们 在 平 路上 行 了 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21013", "content": "深圳 到 北京 的 飞机票 下浮 （ 降价 ） 10% 后 票价 为 1350 元 ， 飞机票 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20677", "content": "小 刚 看 了 一本 160 页 书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/4) ， 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10103", "content": "果园 里 有 一批 苹果 ． 每 筐 转 25 千克 ， 要 60 个 筐 ． 如果 每 筐 多 装 5 千克 ， 可以 少 用 几个 筐 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "694", "content": "a 、 b 两地 相隔 470 千米 ， 甲 车 以 每 小时 46 千米 ， 乙 车 以 每 小时 40 千米 的 速度 先后 从 两地 出发 ， 想想 而 行 ， 相遇 时 甲 车行 了 230 千米 ． 问 ： 乙 车 比 甲 车 早 出发 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18235", "content": "大 课间 活动 时 ， 四年级 同学 们 表演 武术 操 ， 原来 排成 12 行 ， 每行 20 人 ． 队形 变化 后 ， 排成 了 15 行 ， 每行 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3480", "content": "如果 30 千克 煤 可 发电 12 度 ， 那么 平均 每千克 煤 可 发电 多少度 ？ （ 用 最 简分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18920", "content": "植树节 时 ， 六年级 同学 计划 植 240 棵 树 ． 实际 第一周 就 植 了 (2/5) ， 还要 再植 多少 棵 ， 就 使得 已 植 的 棵 数 与 未 植 的 比 是 2 ： 1 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1065", "content": "丁丁 读 一本 故事书 ， 第一天 读 了 全书 的 25% ， 第 二 天 读 了 140 页 ， 还 剩下 全书 的 (2/5) 没有 读 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3690", "content": "吴 城中心 小学 三年级 一班 共有 学生 56 人 ， 其中 女生 占 (5/8) ， 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13702", "content": "上衣 每件 154 元 ， 裙子 每 条 76 元 ， 学校 舞蹈队 购买 了 28 套 ， 应付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4760", "content": "小 冬 收集 了 《 水浒传 》 卡片 12 张 ， 是 小 亮 收集 卡片 张 数 的 (2/5) ， 小强 的 卡片 张 数 是 小 亮 的 (4/5) ， 小强 有 多少 张 卡片 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19051", "content": "有 2 种 饮料 和 3 种 糕点 可 供选择 ． 贝 贝 拿 一种 糕点 和 一瓶 饮料 ， 一共 有 多少 种 不同 的 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16415", "content": "一 个 加数 是 (3/20) ， 另 一个 加数 比 这个 加数 少 (1/20) ， 这 两个 加数 的 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10020", "content": "甲 数 是 乙 数 的 (5/8) ， 乙 数 比 甲 数多 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15365", "content": "王先生 用 820 元 买 了 20 箱 饲料 ． 上网 后 发现 ， 该 产品 从 厂家 直接 购货 ， 每箱 32 元 ． 他 一共 多 花 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2264", "content": "一 种 电冰箱 现价 2450 元 ， 现在 每 台 比 原价 少 50 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19712", "content": "多 思 玩具店 要 生产 4000 个 玩具 ， 已经 生产 了 12 天 ， 每天 生产 150 个 ， 剩下 的 要求 10 天 完成 ， 则 剩下 的 每天 生产 多少 个 零件 才能 按时 完成 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15292", "content": "圆 的 直径 是 2 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18005", "content": "一 种 商品 按 定价 出售 ， 每个 可以 获得 36 元 钱 的 利润 ． 现在 按 定价 打 0.8 出售 5 个 ， 所 能 获得 的 利润 与 按 定价 每个 减价 28 元 出售 10 个 所 能 获得 的 利润 相同 ． 这种 商品 每个 定价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "530", "content": "两座 大楼 之间 相距 168 米 ， 管理处 要 在 两座 大楼 之间 的 小路 的 一边 栽树 ， 要 栽 27 棵 树 ， 则 相邻 两棵树 之间 的 距离 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14954", "content": "商 和 余数 都 是 13 ， 除数 是 24 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12419", "content": "王 叔叔 买 了 一辆 价值 16000 元 的 摩托车 ． 按规定 ， 买 摩托车 要 缴纳 10% 的 车辆 购置税 ． 王 叔叔 买 这辆 摩托车 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3455", "content": "学校 有 篮球 60 个 ， 足球 比 蓝球 多 (1/4) ， 足球 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "419", "content": "一 段 路 长 4 千米 ， 修 了 (1/3) 千米 ， 还 剩 多少 千米 没 修 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3159", "content": "猴子 妈妈 拿来 一根 很 长 的 木条 ， 要 把 它 锯 成 4 段 ． 猴 妈妈 问 小猴子 ： 如果 锯开 一处 需要 2 分钟 ， 锯 完 这根 木条 最少 只用 （ 多少 ） 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19406", "content": "工程队 修筑公路 ， 前 4 天 每天 修路 45.9 米 ， 后 5 天 共 修路 225 米 ， 平均 每天 修路 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22453", "content": "小名 身上 由 45 元 钱 ， 龚 老师 身上 的 钱 是 小名 的 (7/5) 倍 还 多 10 元 ， 龚 老师 身上 有 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3745", "content": "某 单位 精简机构 前 有 60 人 ， 精简 了 10% 的 人员 后 ， 现在 这个 单位 还有 工作人员 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18907", "content": "工程队 挖 一条 隧道 ， 原 计划 每天 挖 0.6 千米 ， 16 天 可以 完成 ， 实际 每天 挖 0.8 千米 ， 实际 多少 天 挖 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2459", "content": "果园 里 桃树 的 棵 数 比 梨树 少 20% ， 恰好 少 20 棵 ， 果园 里 梨树 有 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6706", "content": "双休日 爸爸 带 小 勇 去 登山 ， 从 山 底 到 山顶 全程 7.2 千米 ， 他们 上山 用 了 3 小时 ， 下山 用 了 2 小时 ． 他们 上 、 下山 的 平均速度 是 每 小时 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1622", "content": "花园里 有 白玫瑰 225 朵 ， 红玫瑰 的 朵 数 是 白玫瑰 的 8 倍 少 65 朵 ， 花园里 一共 有 多少 朵 玫瑰花 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11295", "content": "一 桶 水 连 桶 共 重 17.5 千克 ， 把 水 倒 出 (1/3) 后 ， 重 12 千克 ， 空桶 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3901", "content": "李老师 买 了 一辆 汽车 ， 向 银行 按揭 贷款 20000 元 ， 贷款 期限 为 一年 ， 年利率 为 6.5% ， 到期 一共 还贷 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22520", "content": "张 爷爷 家 养鸡 28 只 ， 养 的 鸭 是 鸡 的 75% ． 张 爷爷 家 养鸡 和 鸭 共 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4087", "content": "一 个 圆柱形 玻璃瓶 ， 体积 是 75.36 立方厘米 ， 高 是 6 厘米 ， 它 的 底 面积 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10499", "content": "3.7 * 8 + 2010 / 67 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10898", "content": "一 个 长方形 的 长 是 (5/6) 分 米 ， 宽 是 长 的 (2/3) ， 长方形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13975", "content": "制造 一批 零件 ， 按计划 36 天 可以 完成 它 的 (1/3) ， 实际 工作 12 天 后 ， 工作效率 提高 了 20% ， 那么 实际 完成 这 批 零件 共用 了 多少 天 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "1977", "content": "小 华 看 一本 故事书 ， 第一天 看 了 15 页 ， 第 二 天 看 了 20 页 ， 这时 正好 看 了 全书 的 20% ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17450", "content": "某 水果店 运进 8 箱 苹果 ， 每箱 25 千克 ， 一 共用 去 1200 元 ， 每千克 苹果 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12415", "content": "苹果 有 45 千克 ， 梨 的 重量 是 苹果 的 (2/3) ， 又 是 橘子 的 (5/6) ， 橘子 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5792", "content": "一 种 手表 原价 每块 100 元 ， 现在 降价 到 80 元 ， 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17457", "content": "一 根 绳子 ， 第一次 剪 去 一半 ， 第 二 次 剪 去 4 米 ， 最后 剩下 2 米 ． 原来 绳 长 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19558", "content": "一 个 复读机 0.85 后 的 价格 是 425 元 ， 算 一 算 ， 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6033", "content": "一 块 正方形 的 草坪 ， 周长 是 80.2 米 ， 小 芳 沿着 草坪 4 周 走 了 10 圈 ， 她 共 走 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14940", "content": "同学 们 折纸 花 ， 第一 小队 折 了 174 朵 ， 第 二 小队 折 了 266 朵 ， 每 8 朵 扎成 一束 ． 两 小队 折 的 花 可以 扎成 多少 束 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6346", "content": "张 阿姨 到 市场 买 了 6 千克 豆角 ， 付出 15 元 ， 找回 1.8 元 ． 每千克 豆角 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18228", "content": "2013 年 2 月 ， 小 丽 把 500 元 零花钱 存 到 银行 ， 定期 两年 ， 期满 后 ， 可 得 本金 和 利息 共 537.5 元 ． 你 知道 这种 定期存款 的 年利率 = ？ （ 暂免 利息税 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9703", "content": "一 本 故事书 有 54 页 ， 小强 在 一天 里 读 了 它 的 (1/6) ， 这 一天 他 读 了 多少 页 书 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17892", "content": "清华大学 附中 共有 学生 1800 名 ， 若 每个 学生 每天 要 上 8 节 课 ， 每位 教师 每天 要 上 4 节 课 ， 每节课 有 45 名 学生 和 1 位 教师 ， 据此 请 推出 清华大学 附中 共有 教师 多少 名 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13353", "content": "商店 以 每 双 6.5 元 购进 一批 凉鞋 ， 售价 为 每 双 8.7 元 ， 当 卖 剩下 25% 时 ， 不仅 收回 了 购进 这 批 凉鞋 所 付出 的 款项 ， 而且 获利 20 元 ． 这 批 凉鞋 共有 多少 双 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15627", "content": "小 明 的 妈妈 每天 骑车 上班 要 7 分钟 ， 她 平均 每分钟 骑 185 米 ． 小 明 家 与 妈妈 上班 的 地方 相距 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22354", "content": "四年级 共有 学生 108 人 ， 打算 每个 同学 都 订 一套 校服 ， 上衣 每件 43 元 ， 裤子 每 条 27 元 ， 一共 要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4769", "content": "工程队 要 修 一条 长 1500 米 的 公路 ， 已经 修 了 12 天 ， 还 剩 720 米 没 修 ． 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12966", "content": "一 个 筑路 队 铺 一段 公路 ， 已 铺 的 和 未 铺 的 长度 比 是 5 ： 3 ， 已 铺 的 长度 比 这 段 公路 的 (1/2) 还 多 30 米 ， 这 段 公路 全长 多少 米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8167", "content": "用 24 * 3.5 的 积 减去 (1/8) / 0.4 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12176", "content": "面粉 每千克 4.9 元 ， 大米 每千克 3.8 元 ， 买 面粉 和 大米 各 10 千克 ， 付出 100 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10434", "content": "南京长江大桥 建成 以前 ， 火车 乘 轮渡 过 长江 ， 需要 (25/12) 小时 ， 现在 从 大桥 通过 只用 (1/4) 小时 ． 现在 火车 过 江 比 乘 轮渡 节省 多少 小时 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13066", "content": "除数 是 7 ， 商 是 254 ， 余数 是 4 ， 被除数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13652", "content": "秋季 运动会 200 米 短跑 决赛 马上 鸣枪 ， 玲玲 奇怪 的 发现 8 名 选手 的 起跑线 不 一样 ， 已知 最 内圈 的 弯道 半径 是 31.7 米 ， 每 道 赛道 宽 约 1.2 米 ， 弯道 部分 为 半圆 ． 为了 公平 ， 相邻 的 两套 跑道 上 起跑线 应 相差 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11363", "content": "李 刚 家 要 栽种 一批 树苗 ， 这种 树苗 的 成活率 一般 为 75% - 80% ， 如果 要 栽 活 1200 棵 树苗 ， 那么 至少 应 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22926", "content": "“ 5 一 ” 期间 商场 降价 20% 出售 一种 电脑 ， 每 台 现在 售价 3600 元 ． 这种 电脑 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7528", "content": "(6/7) 与 (7/15) 的 积 的 20 倍 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13336", "content": "一 辆 汽车 从 甲地 开往 乙地 ． 去 的 时候 速度 是 45 千米 / 小时 ， 用 了 2 小时 ． 回来 时 拉 了 货 ， 用 了 3 小时 ． 回来 时 平均速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6549", "content": "挖 一条 水渠 ， 第一天 挖 了 全长 的 28% ， 第 二 天 挖 了 全长 的 30% ， 两天 共 挖 了 870 米 ， 这 条 水渠 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5520", "content": "修 一条 路 ， 某 修路 队 3 天 修 了 (1/6) ， 那么 这个 修路 队 修 完 这 条 路 共 需 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1917", "content": "小 丽 和小红 参加 踢毽子 比赛 ， 小 红 踢 了 90 下 ， 比 小 丽 多 踢 20% ， 小 丽 踢 了 多少 下 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19606", "content": "一 队 小学生 ， 李 平 前面 有 8 个 学生 比 他 高 ， 后面 9 个 学生 比 他 矮 ， 这 队 小学生 共有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4063", "content": "有 16 位 小朋友 在 玩游戏 ， 后来 有 3 位 小朋友 加入 ， 又 有 6 位 小朋友 回家 去 了 ， 现在 有 多少 位 小朋友 在 玩 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "392", "content": "某 工厂 5 月份 的 用水 指标 是 320 吨 ， 实际 只用 了 280 吨 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7464", "content": "一 堆 煤 ， 第一 车 运走 总量 的 (1/3) ， 第 二 车 运走 总量 的 (2/5) ， 还有 2400 千克 ， 这 堆 煤 总共 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15641", "content": "修 一条 水渠 ， 计划 每天 修 84 米 ， 34 天 可以 完成 ， 结果 每天 修 102 米 ， 可以 提前 几天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6741", "content": "有 两根 绳子 ， 一根 长 12.56 米 ， 另 一根 比 它 短 2.5 米 ． 两根 绳子 共 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15670", "content": "前进 水果店 运 来 苹果 200 千克 ， 是 梨 的 (4/9) ， 运进 西瓜 的 重量 是 梨 的 (4/15) ， 运进 西瓜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21131", "content": "紫花 有 180 朵 ， 黄 花朵 数 是 红 花朵 数 的 (3/4) ， 紫 花朵 数 的 (3/5) 和 红花 一样 多 ， 黄花 有 多少 朵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13052", "content": "光明 小学 有 男生 120 人 ， 女生 人数 增加 20% 就 与 男生 人数 一样 多 ， 三年级 学生 共有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11712", "content": "128 与 362 的 和 乘 5 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8276", "content": "动车组 列车 的 运行 速度 是 240 千米 / 小时 ， 普通 列车 比 它 慢 (7/12) ． 普通 列车 的 速度 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15950", "content": "学校 买 了 25 个 足球 共 花 1875 元 ， 如果 再 买 8 个 足球 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17824", "content": "两个 修路 队 合 修 一条 公路 ， 甲队 已经 修 了 全长 的 (2/7) ， 乙 队 已经 修 了 全长 的 (3/5) ， 这 条 公路 还 剩 几分 之 几 没 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4009", "content": "非洲 野狗 的 最高 速度 是 56 千米 / 时 ， 鸵鸟 的 最高 速度 是 非洲 野狗 的 1.3 倍 ， 鸵鸟 的 最高 速度 = 多少 千米 / 时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10416", "content": "甲 、 乙 两列 火车 同时 从 相距 988 千米 的 两地 相向 而 行 ， 经过 5.2 小时 两车 相遇 ． 甲 列车 每 小时 行 93 千米 ， 乙 列车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1986", "content": "商场 促销 ， 全场 0.75 ． 妈妈 买 了 一件 原价 是 280 元 的 衣服 ， 现价 几元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4567", "content": "一 种 物品 降价 15% 后 比 原来 便宜 9 元 ， 这种 物品 现在 的 价钱 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12130", "content": "妈妈 从 超市 买来 1.8 千克 苹果花 了 17.64 元 ， 邻居 王 阿姨 也 买 了 同样 的 苹果 ， 花 了 23.52 元 ， 她 买 了 多少 千克 苹果 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5218", "content": "第 29 届 奥运会 在 中国 北京 取得 了 圆满成功 ， 在 此次 奥运会 上 中国 代表团 获得 了 金牌 51 枚 ， 居首位 ． 美国 代表团 获得 的 金牌数 是 中国 代表团 的 (12/17) ， 德国 代表团 获得 的 金牌数 是 美国 代表团 的 (4/9) ， 德国 代表团 获得 的 金牌 多少 枚 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17734", "content": "钢笔 的 售价 是 9 元 ， 自动铅笔 的 售价 比 它 少 (1/3) ． 自动铅笔 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8243", "content": "50 与 18 的 差 ， 乘 44 与 56 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2899", "content": "工地 有 两堆 石子 ， 第一 堆 300 吨 ， 第 二 堆 比 第一 堆 的 2 倍 少 4 吨 ， 两堆 石子 共 重 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17114", "content": "学校 买 了 96 套 课桌椅 ， 共用 去 11520 元 ， 其中 桌子 每张 80 元 ． 椅子 每 把 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18151", "content": "张老师 在 文具店 里 买 了 一支 单价 15.8 元 的 钢笔 和 一本 15.4 元 的 书 ， 他 付 了 50 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15284", "content": "家电 商场 以 1840 元 的 价格 卖出 某 台 彩电 ， 赚 了 15% ． 这 台 彩电 的 进价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3895", "content": "一 桶 油 ， 第一次 取出 40% ， 第 二 次 比 第一次 少 取出 10 千克 ， 桶 里 还 剩 28 千克 ， 这 桶 油 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "318", "content": "一 条 路 甲队 每天 修 55 米 ， 乙 队 每天 修 25 米 ， 乙 队 先 修 了 720 米 后 两队 一齐 修 ， 多少 天 后 两队 修 的 一样 多 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4233", "content": "一 个 房地产 开发商 计划 把 (3/2) 公顷 的 地 分成 每块 为 (1/8) 公顷 的 小 块 地 ， 可以 分成 多少 块 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15219", "content": "一 批 货物 ， 第一天 运走 100 吨 ， 第 二 天 运走 155 吨 ， 还 剩下 这 批 货物 的 15% 没有 运走 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15272", "content": "李 华 看 一 本书 ， 已经 看 了 78 页 ， 没 看 的 比 看 了 的 3 倍 少 8 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15170", "content": "小张 今年 的 月工资 是 1440 元 ， 是 去年 月工资 的 120% ， 他 去年 的 月工资 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5034", "content": "物体 在 月球 上 的 重量 是 在 地球 上 的 (1/6) ， 宇航员 的 在 地球 上 的 体重 是 90 千克 ， 他 到 了 月球 上 的 体重 = 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19442", "content": "5 一班 有 男生 26 人 ， 女生 24 人 ， 男生 是 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19043", "content": "园里 有 30 棵 苹果树 ， 梨树 比 苹果树 的 3 倍 少 25 棵 ． 梨树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3385", "content": "6 （ 1 ） 班 的 同学 在 操场 排成 一 纵列 做 早操 ， 明明 也 站 在 队里 ， 他 数 了 数 ， 发现 排 在 他 前面 的 人数 是 总数 的 (5/6) ， 排 在 他 后面 的 人数 是 总数 的 (1/7) ， 从前 往后 数 明明 排 在 第 几位 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10661", "content": "除数 是 9 ， 商 是 5 ， 余数 是 2 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5890", "content": "4 （ 1 ） 班 30 人 4 月份 喝牛奶 共 花 去 1800 元 ， 每人每天 花 多少 元 喝牛奶 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2953", "content": "一 次 检阅 ， 接受 检阅 的 一列 彩车 车队 共 30 辆 ， 每辆车 长 4 米 ， 前后 两辆车 相隔 5 米 ． 如果 车队 每秒 行驶 2 米 ， 那么 这 列车 队 要 通过 535 米 长 的 检阅 场地 ， 需要 多少 时间 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22063", "content": "一 本书 有 216 页 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3290", "content": "六年级 师生 向 希望 小学 捐书 300 本 ， 比 五年级 多 捐 (1/4) ． 五年级 师生 捐书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2762", "content": "同学 们 做 了 80 朵 纸花 ， 其中 红花 有 60 朵 ， 其余 的 都 是 黄花 ， 红花 比 黄花 多 多少 朵 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
diff --git a/static/test_data/disenq_train.json b/static/test_data/disenq_train.json
deleted file mode 100644
index 3a2a0fdc..00000000
--- a/static/test_data/disenq_train.json
+++ /dev/null
@@ -1,18476 +0,0 @@
-{"question_id": "946", "content": "甲 数 除以 乙 数 的 商 是 1.5 ， 如果 甲 数 增加 20 ， 则 甲 数 是 乙 的 4 倍 ． 原来 甲 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21227", "content": "客车 和 货车 分别 从 a 、 b 两站 同时 相向 开出 ， 5 小时 后 相遇 ． 相遇 后 ， 两车 仍 按 原 速度 前进 ， 当 它们 相距 196 千米 时 ， 货车 行 了 全程 的 80% ， 客车 已 行 的 路程 与 未 行 的 路程 比 是 3 ： 2 ． 求 a 、 b 两站 间 的 路程 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16892", "content": "图书 角 有 书 30 本 ， 第一天 借出 了 (1/5) ， 第 二 天 又 还 回 5 本 ， 现在 图书 角 有 多少 本书 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8502", "content": "甲 、 乙 两车 同时 从 相距 230 千米 的 两地 相向 而 行 ， 3 小时 后 两车 还 相距 35 千米 ． 已知 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23021", "content": "果园 里 有 苹果树 300 棵 ， 比 桔树 多 20% ， 桔树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5901", "content": "某班 学生 参加 数学 兴趣小组 ， 其中 ， 参加 的 男生 是 全班 人数 的 20% ， 参加 的 女生 是 全班 人数 的 (2/7) 多 2 人 ， 不 参加 的 人数 比 全班 人数 的 (3/5) 少 5 人 ， 全班 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12815", "content": "某 商店 有 36 筐 苹果 ， 每 筐 重 40 千克 ， 运 来 的 苹果 重量 是 梨 的 8 倍 ， 运 来 梨 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19584", "content": "阳光 小学 举行 少先队 队 仪式 比赛 ， 全校 共有 720 名 少先队员 ， 平均 分成 15 个 中队 ， 每个 中队 又 分成 4 分 小队 ， 平均 每个 小队 有 多少 名 少先队员 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10773", "content": "大 猴 有 9 只 ， 小 猴 比 大 猴 多 4 只 ， 小 猴 有 多少 只 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22037", "content": "一 根 电线 ， 用 去 (3/5) 米 ， 用 去 的 比 剩下 的 少 (1/4) 米 ， 这根 电线 原来 有 多长 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9545", "content": "小 玲 买 了 6 个 单价 为 0.8 元 的 大 通行 ， 9 个 小 通行 ； 大 通行 的 钱 比 小 通行 多 0.3 元 ． 每个 小 通行 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23084", "content": "一 根 木料 ， 锯 成 4 段 要 付费 1.2 元 ， 如果 要 锯 成 12 段 要 付费 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17241", "content": "把 4 米 长 的 木棍 截 5 次 ， 截 成 相等 的 长度 ， 则 每 段长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18547", "content": "学校 买来 5 箱 铅笔 ， 每箱 有 20 合 ， 每 合 有 50 支 铅笔 ， 学校 一共 买来 多少 支 铅笔 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21569", "content": "在 前 3 场 击球 游戏 中 ， 王 新 同学 得分 分别 为 139 ， 143 ， 144 ， 为 使 前 4 场 的 平均 得 分为 145 ， 第 4 场 她 应得 多少 分 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7989", "content": "一 堆 苹果 580 千克 ， 平均 装 在 18 个 箱子 里 还 剩 4 千克 ， 每个 纸箱装 了 多少 千克 苹果 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11284", "content": "彭 娟 今年 8 岁 ， 妈妈 的 年龄 是 彭 娟 的 4 倍 还 多 2 岁 ， 妈妈 今年 多少岁 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4433", "content": "客车 和 货车 同时 从 甲 、 乙 两地 相对 出发 ， 6 小时 相遇 ． 货车 每 小时 行 50 千米 ， 客车 的 速度 是 货车 的 1.5 倍 ， 甲 、 乙 两地 之间 的 路程 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20400", "content": "小强 的 身高 是 135 厘米 ， 小 宁 比 小强 高 (1/5) ． 小 宁 的 身高 = 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8423", "content": "一 根 铁丝 ， 第一次 用 去 全长 的 (1/5) ， 第 二 次 用 去 15 米 ， 这时 用 去 的 与 剩下 的 长度 比 正好 是 4 ： 1 ． 这根 铁丝 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21007", "content": "汽车 修理厂 今年 一月份 修理 汽车 63 辆 ， 比 去年同期 的 2 倍 少 3 辆 ， 去年 一月份 修理 汽车 多少 辆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15455", "content": "一 个 小数 的 小数点 向 右 移动 3 位 后 ， 正好 是 1000 的 70% ， 这个 小数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20209", "content": "计算 ： 0.15 / 2.1 * 56 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2814", "content": "一 列 火车 从 北京 开往 广州 ， 每 小时 行 95 千米 ， 行驶 14 小时 可以 到达 ． 北京 到 广州 的 铁路 全长 多少 千米 ？ ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19103", "content": "图书馆 有 科技 书 400 本 ， 比 故事书 少 (3/8) ， 故事书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13151", "content": "一 根 木料 ， 第一次 用 去 (2/5) ， 第 二 次 用 去 余下 的 (3/5) ， 还 剩 (1/2) 米 ． 这根 木料 全长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16517", "content": "同样 材质 的 铜 制成 的 两个 零件 ． 一个 体积 15 立方厘米 ， 重 133.5 克 ． 另 一个 体积 20 立方厘米 ， 重 多少 克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3512", "content": "在 400 米 的 环形 跑道 4 周 每隔 5 米 插 一面 彩旗 ， 需要 多少 面 彩旗 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1928", "content": "商店 有 彩电 101 台 ， 彩电 比 冰箱 的 9 倍 多 11 台 ， 商店 有 冰箱 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14301", "content": "一 个 工厂 前 6 个 月 用 煤 120 吨 ， 后 半年 用 煤 102 吨 ． 每吨 煤 按 80 元 计算 ， 后 半年 比 前半年 平均 每月 用 煤 节约 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "469", "content": "一 筐 苹果 连 筐 重 28 千克 ． 卖出 半筐 苹果 后 ， 连 筐 一起 称 刚好 是 15 千克 ． 请问 筐 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7590", "content": "有 一块 14 厘米 长 的 塑料板 ， 是 由 两块 一样 长 的 塑料板 钉 成 的 ， 中间 钉 在 一起 重叠 的 部分 长 2 厘米 ， 一块 塑料板 长 多少 厘米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9578", "content": "一 件 上衣 原价 100 元 ， 现在 按 0.85 销售 ， 现在 比 原来 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12228", "content": "学校 在 一个 星期 的 前 4 天 共 用电 150 度 ， 后 3 天 平均 每天 用电 41 度 ． 学校 这个 星期 平均 每天 用电 多少度 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13556", "content": "每千克 橘子 4.25 元 ， 妈妈 买 了 14 千克 ， 付给 售货员 100 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7826", "content": "把 1 米 长 的 铁丝 平 分成 6 份 ， 每份 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16727", "content": "李 奶奶家 养鸡 12 只 ， 鸭 的 只 数 是 鸡 的 (3/4) ， 又 是 鹅 的 (9/10) ． 鹅 有 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21233", "content": "三年级 学生 扎 了 125 朵 红花 和 35 朵 黄花 ． 他们 将 这些 花 送给 幼儿园 的 5 个 幼儿班 ， 平均 每个 班 幼儿 可以 得到 多少 朵花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10374", "content": "一 个 正方形 的 边长 是 0.35 米 ， 它 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21709", "content": "王家 村 村委会 图书室 有 科技 书 、 文艺 书 共 630 本 ， 其中 科技 书 占 20% ． 后来 又 买进 一批 科技 书 ， 这时 科技 书 占 两种 书 的 30% ， 后来 又 买进 的 科技 书 = 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8196", "content": "一 辆 客车 和 一辆 货车 同时 从 两地 相对 开出 ， 客车 每 小时 行 60 千米 ， 货车 每 小时 行 52 千米 ， 经过 3.5 小时 两车 相遇 ． 求 两地 之间 的 距离 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3908", "content": "36 + 729 再 加上 64 ， 得 多少 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14150", "content": "学校 改造 阶梯教室 实际 用 去 12 万元 ， 比 计划 节省 3 万元 ． 节省 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2832", "content": "修 一条 长 3600 米 的 隧道 ， 已经 修 了 30 天 ， 还 剩 1200 米 没 修 ， 平均 每天 修 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9468", "content": "清潭 福 来 罐头厂 去年 上半年 生产 罐头 48 万箱 ， 是 下半年 产量 的 (4/5) ． 今年 预计 的 产量比 去年 增长 (1/3) ． 求 该厂 今年 的 产量 = 多少 万箱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21000", "content": "工人 叔叔 修 一条 公路 ， 每天 修 6 米 ， 修 了 4 天 后 ， 还 剩 40 米 ， 这 条 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18800", "content": "星期天 ， 小 红 从 家 到 学校 去 参加 体育训练 ， 10 分钟 行 了 全程 的 (1/4) ， 由于 怕 迟到 ， 于是 她 乘 出租车 ， 2 分钟 后 就 到 了 全程 (1/2) ， 照 这样 的 速度 ， 她 达到 学校 可以 提前 多少 分钟 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20756", "content": "在 小路 的 一旁 从头到尾 种 了 31 棵 树 ， 每隔 2 米 种 一棵 ， 这 条 小路 全长 = 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16686", "content": "同学 们 做操 ， 每行 排 12 人 正好 排 4 行 ； 如果 每行 排 8 人 ， 可以 多排 多少 行 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11866", "content": "某 超市 运 来 苹果 90 箱 ， 运 来 的 橘子 的 箱 数 是 苹果 的 60% ， 该 超市 运 来 苹果 和 橘子 共 多少 箱 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14412", "content": "小 军 家 上 月 电话费 50 元 ， 本月 电话费 38 元 ． 本月 比 上 月 节约 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3126", "content": "光华 电池厂 十 月份 生产 电池 480 箱 ， 比 9 月份 增产 80 箱 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3349", "content": "两个 因数 都 是 48 ， 它们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6907", "content": "某班 男同学 占 全班 人数 的 (7/12) ， 比 女同学 多 8 人 ， 该班 共有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "154", "content": "从 (9/7) 的 倒数 里 减去 (6/7) / (6/5) 的 商 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19118", "content": "4 （ 2 ） 班 有 4 个 小组 ， 每个 小组 8 人 ， 全班 共 植树 288 棵 ， 平均 每人 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7605", "content": "在 跳远 比赛 中 ， 合格 的 标准 是 3.00 米 ， 李 明 跳出 了 3.12 米 记 作 + 0.12 米 ， 小 菲 跳 了 2.95 米 ， 应 记 作 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6825", "content": "张 华 看 一本 《 少年 文艺 》 ． 第一天 看 了 50 页 ， 第 二 天 看 了 全书 的 (1/4) ， 还 剩 25 页 没 看 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4858", "content": "4 个 0.1 与 多少 个 (1/10) 的 和 是 1 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12239", "content": "3 个 同学 踢毽子 ． 小 涛 踢 了 150 个 ， 小花 踢 的 个数 是 小 涛 的 (2/3) ， 小 红 踢 的 个数 是 小花 的 (4/5) ． 小 红 踢 了 多少 个 毽子 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6208", "content": "现在 国际 市场 上 原油价格 约 78 美元 一桶 ， 比 一年 前 涨 了 约 (1/5) ， 一年 前 一桶 原油价格 = 多少 美元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7927", "content": "学校 买来 580 本书 ， 发给 24 个 班 后 还 剩 100 本 ． 平均 发给 每个 班 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21413", "content": "水果店 批发 站 共 进货 451 筐 水果 ， 其中 苹果 236 筐 ， 梨 185 筐 ． 余下 的 都 是 香蕉 ， 香蕉 共有 多少 筐 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "540", "content": "一 个 长 6 厘米 ， 宽 3 厘米 的 长方形 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21950", "content": "爱民 村 有 3 个 养鸡场 ， 2 天一 共产 蛋 960 个 ． 平均 每个 养鸡场 产 蛋 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7541", "content": "一 双 布鞋 35.65 元 ， 一双 皮鞋 比 布鞋 贵 116.45 元 ， 张老师 买 一双 皮鞋 会 给 售货员 200 元 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21715", "content": "张 叔叔 卖 一车 西瓜 瓜 ， 卖 了 (2/3) 后 ， 还 剩 30 个 ， 原来 一共 有 多少 个 西瓜 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17780", "content": "甲乙 两城 相距 1560 千米 ， 一辆 汽车 从 甲 城 开往 乙 城 ， 前 6 小时 行 360 千米 ， 照 这样 的 速度 ， 汽车 行 完全 程 一共 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15598", "content": "县里 举行 航模 比赛 ， 方方 的 决赛 成绩 是 22.5 秒 ， 比 预赛 成绩 提高 了 (1/4) ， 方方 的 预赛 成绩 是 几秒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5166", "content": "6 （ 1 ） 班 有 学生 45 人 ， 其中 女同学 占 (4/9) ， 女同学 中 有 (1/10) 近视 ， 近视 的 女同学 占 全班 人数 的 几分 之 几 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17272", "content": "用 一张 长 4.5 分 米 ， 宽 2 分 米 的 长方形 纸 ， 围成 一个 圆柱形 纸筒 ， 它 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5439", "content": "小 丽 身高 126 厘米 ， 正好 是 父亲 身高 的 75% ， 父亲 身高 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16498", "content": "六年级 学生 在 市场 调查 中 了解 到 ， 本月 鲫鱼 售价 比 上 月 提高 15% ． 本月 鲫鱼 售价 为 每千克 6.9 元 ， 上 月 每千克 售价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4423", "content": "甲 数 是 80 ， 比 乙 数 少 20% ， 乙 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2779", "content": "甲 数 是 25 ， 甲 数 的 (1/5) 等于 乙 数 的 40% ， 乙 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17591", "content": "一 块 木板 面积 是 12 平方米 ， 用 去 了 (3/5) ， 还 剩 多少 平方米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22906", "content": "同学 们 做 40 朵花 ， 其中 红花 22 朵 ， 其余 的 是 黄花 ． 黄花 有 多少 朵 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9313", "content": "食堂 原来 每天 烧煤 200 千克 ， 改进 烧煤 方法 后 ， 每天 烧煤 150 千克 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21141", "content": "小 英 去 医院 看望 生病 住院 的 奶奶 ， 她 先 走 了 全程 的 (1/10) 到 车站 ， 再 坐车 行驶 了 全程 的 (7/10) ， 这时 小 英 离 医院 还有 全程 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6107", "content": "奶牛场 有 6 个 牛棚 ， 每个 牛棚 中 有 7 头 奶牛 ． 一天 共 喂 840 千克 饲料 ， 平均 每 头 奶牛 一天 喂 多少 千克 饲料 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9890", "content": "一 个数 的 2.5 倍 是 4.3 与 0.6 的 差 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22979", "content": "小 明 读 一本 故事书 ， 每天 读 全书 的 (1/15) ， 3 天 后 还 剩 40 页 没有 读 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18057", "content": "用 0.7 与 2.3 的 差 去除 它们 的 和 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6194", "content": "一 个 长方体 的 底 面积 是 80 平方米 ， 高 是 7 米 ， 它 的 体积 = 多少 立方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4848", "content": "一 个 工程队 修 一条 公路 ， 9 天 修 了 270 米 ， 还 剩 630 米 ． 照 这样 计算 ， 修 完 这 条 铁路 共 需要 几天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2232", "content": "王 杨 期末 数学 成绩 是 96 分 ， 孙 月 的 成绩 比 王 杨 低 (1/6) ， 王 华 的 成绩 是 王 杨和孙 月 总分 的 (1/2) ． 王 华 得 多少 分 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22234", "content": "水果店 运出 一批 荔枝 ． 上午 卖出 45 千克 ， 下午 卖出 62 千克 ， 下午 比 上午 多 卖 得 了 149.6 元 ， 一 千克 荔枝 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11093", "content": "某 汽车厂 12 月份 实际 生产 300 辆 汽车 ， 比 计划 多 生产 60 辆 ， 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10911", "content": "小 丁丁 今年 8 岁 ， 爷爷 比 他 大 80 岁 ． 爷爷 的 年龄 是 小 丁丁 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14549", "content": "张 大伯 在 一条 长 1000 米 的 坡 路上 跑步 ， 去 的 时候 用 了 3 分 ， 回来 的 时候 用 了 2 分 ． 张 大伯 平均 每 分 跑 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23093", "content": "(62/65) 减去 它 的 (16/31) ， 所得 的 差 除 24 ， 结果 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14993", "content": "电影院 有 25 排座位 ， 每排 有 32 个 座位 ， 现 学校 共 759 人 到 电影院 看 演出 ， 还 剩 多少 个 座位 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17343", "content": "学校 买来 儿童读物 870 本 ， 分给 6 个 年级 ， 每个 年级 有 5 个 班 ， 平均 每个 班 能 分 到 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "903", "content": "(5/9) 里面 有 多少 个 (1/9) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1104", "content": "图书馆 4 位 管理员 修补 图书 ， 平均 每人每天 修补 45 本 ， 已经 修补 了 3 天 ， 共 修补 了 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2708", "content": "爸爸 买 了 一个 随身听 ， 原价 160 元 ， 现在 只 花 了 0.9 的 钱 ， 比 原价 便宜 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21729", "content": "一 堆 西瓜 共有 1860 kg ， 第一天 运走 总数 的 (1/3) ， 第 二 天 运走 总数 的 25% ， 这 堆 西瓜 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11407", "content": "某 工厂 运 来 一堆 煤 ， 第一季度 用 去 (2/5) 吨 ， 比 第 二 季度 少 用 去 (1/5) 吨 ． 两个 季度 共用 去 煤 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1305", "content": "一 本 课外读物 ， 小 红 看 了 45 页 ， 正好 是 这 本书 的 (5/9) ， 这本 课外书 一共 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8648", "content": "氢 、 氧 按 1 ： 8 的 重量 比 合成 水 ， 81 kg 的 水中 ， 含氢 多少 kg ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22199", "content": "一 堆 有 400 吨 ， 已经 运走 了 260 吨 ， 剩下 的 4 次 运 完 ， 平均 每次 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7996", "content": "57 加上 一个 数 正好 是 48 的 2 倍 ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6035", "content": "一 根 木头 平均 锯 成 5 段 ， 每 锯下 一段 要 4 分钟 ， 锯 完 一共 要 花 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4812", "content": "按规定 ， 购买 摩托车 要 交 10% 的 车辆 购置税 ， 李 华 购买 一辆 摩托车 ， 连 车 带 税 一共 花 了 5720 元 ， 这辆 摩托车 的 原价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22494", "content": "同学 们 做 了 180 朵 纸花 ， 每 25 朵 扎成 一束 ， 已经 扎 了 6 束 ， 还 剩 多少 朵花 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "446", "content": "一 个 排球 40 元 ， 一个 篮球 的 价格 是 一个 排球 的 1.2 倍 ， 一个 足球 的 价格 又 是 篮球 的 (5/8) ， 一个 足球 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18121", "content": "中山 到 广州 的 公路 大约 长 110 千米 ． 小汽车 从 中山 到 广州 行驶 了 2 小时 ， 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11924", "content": "某市 居民 用水 价格 提高 20% 后 ， 每 立方米 是 1.8 元 ． 提价 前 每 立方米 的 价格 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5763", "content": "学校 设有 田径队 和 合唱队 ， 合唱队 人数 是 两队 总 人数 的 (3/5) ， 若 从 合唱队 调出 6 人 到 田径队 ， 则 合唱队 与 田径队 人数 的 比 是 3 ： 4 ， 合唱队 原有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12061", "content": "广播操 比赛 ， 三年级 学生 每行 站 20 人 ， 正好 站 18 行 ． 如果 每行 站 24 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7685", "content": "一 桶 色拉油 ， 用 去 整桶 的 (3/4) ， 还 剩下 8 千克 ． 这 桶 色拉油 总 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1715", "content": "平均 每人 做 小红花 11 朵 ， 12 人 做 小红花 多少 朵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4371", "content": "一 辆 汽车 和 一辆 摩托车 同时 从 相距 860 千米 的 两地 出发 ， 相向 而 行 ， 汽车 每 小时 45 千米 ， 摩托车 每 小时 70 千米 ， 6 小时 后 两车 相距 多少 千米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7865", "content": "商店 运进 260 包 白糖 ， 卖掉 白糖 的 (1/12) 后 ， 剩下 的 白糖 比 红糖 少 7 包 ， 运进 红糖 多少 包 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3453", "content": "学校 组织 植树 劳动 ， 平均 每人 植树 12 棵 ． 一班 有 学生 46 人 ， 二 班 有 学生 43 人 ， 两个 班 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7560", "content": "番茄 有 15 筐 ， 土豆 的 筐 数 是 番茄 的 3 倍 ． 白菜 的 筐 数 比 番茄 和 土豆 的 总 筐 数 少 8 筐 ． 白菜 有 多少 筐 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12697", "content": "36.8 - 44.08 / 5.8 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12089", "content": "一 辆 汽车 5 小时 行驶 了 620 千米 ， 照 这样 的 速度 行驶 ， 如果 再 行驶 744 千米 ． 这辆 汽车 前后 一共 需要 用 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8505", "content": "苹果 的 单价 是 12 元 每千克 ， 学校 打算 买 60 千克 苹果 ． 请问 ： 学校 买 这些 苹果 要 付 多少 钱 ？ （ 提示 ： 单价 d ā nji à * 数量 sh ù li à ng ﹦ 总价 z ǒ ngji à ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9303", "content": "在 四川 抗震救灾 的 日子 里 ， 特警 刘 叔叔 前 4 天 在 汶川县 共 奋战 74 小时 ， 后 3 天 在 什邡市 每天 工作 15 小时 ． 这 一周 刘 叔叔 平均 每天 工作 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5417", "content": "高速 列车 的 行驶 速度 为 每 小时 280 千米 ， 是 汽车 速度 的 4 倍 ， 高速 列车 的 速度 比 汽车 每 小时 快 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17050", "content": "甲 、 乙 两 数 的 积 是 (7/6) ， 甲 数 是 (2/3) ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23073", "content": "差 是 590 ， 减数 是 380 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3615", "content": "饲养场 的 兔 和 羊 一共 有 450 只 ， 兔 比 羊 多 (1/4) ． 饲养场 有 兔 多少 只 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18917", "content": "一 只 山雀 4 天 大约 能 吃 600 只 害虫 ， 照 这样 计算 ， 一只 山雀 一个月 大约 能 吃 多少 只 害虫 ？ （ 一个月 按 30 天 计算 ． ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5860", "content": "1.25 * 16 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10423", "content": "一 位 旅客 携带 了 30 千克 的 行李 ， 按 民航 规定 ， 旅客 最 多 携带 20 千克 行李 ， 超重 部分 每千克 按 飞机 票价 的 1.5% 购买 行李 票 ， 现在 旅客 购买 120 元 的 行李 票 ， 则 它 的 飞机 票价 应 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9622", "content": "小 明 体重 30 千克 ， 是 小 刚 的 (3/4) ， 小 华 体重 是 小 刚 的 (4/5) ， 小 华 体重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18268", "content": "某校 六年级 向 希望 小学 捐款 250 元 ， 占 全校 捐款 的 (5/19) ． 全校 的 捐款 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3105", "content": "黄 老师 最近 搬 到 新 的 工作室 ． 她 站 在 阳台 上 发现 往 上 看 时 有 3 个 阳台 ； 往 下 看 时 有 6 个 阳台 ． 那么 ， 黄 老师 所在 的 这 座 大楼 一共 有 多少 层 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4010", "content": "一 块 蛋糕 长 12 cm ， 宽 6 cm ， 厚 5 cm ， 切 一刀 ， 表面积 最少 增加 了 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19242", "content": "商店 有 黄 气球 75 个 ， 红 气球 63 个 ， 花 气球 的 个数 比 黄 气球 和 红 气球 的 总数 少 30 个 ， 花 气球 有 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22177", "content": "小 明 生日 时 ， 妈妈 送给 他 一个 圆锥形 的 陀螺 ， 陀螺 的 底面 直径 是 4 厘米 ， 高 5 厘米 ， 如果 用 一个 长方体 盒子 包装 ， 这个 盒子 的 容积 至少 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20397", "content": "(1/3) + (1/2) 的 和 ， 等于 一个 数 的 (3/4) ． 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11976", "content": "重庆 车站 与 成都 车站 的 路程 760 千米 ． 一辆 客车 从 重庆 车站 出发 往 成都 车站 开去 ， 每 小时 行 80 千米 ； 当 客车 已 行 160 千米 时 ， 一辆 小车 从 成都 车站 出发 向 重庆 车站 开去 ， 每 小时 行 120 千米 ． 几小时 后 两车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10171", "content": "一 辆 汽车 到 某 一站 时 ， 有 7 名 乘客 下车 ， 13 名 上车 ， 这时 车上 有 42 名 乘客 ． 到 此 站 前 车上 有 多少 名 乘客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10138", "content": "4 、 5 、 六年级 各 有 3 个 班 ， 要是 108 名 同学 去 敬老院 打扫卫生 ， 平均 每班 要 选 多少 名 同学 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7385", "content": "某 工厂 要 生产 一批 玩具 ， 计划 每天 生产 40 台 ， 25 太 完成 ． 实际 提前 5 天 完成 ， 实际 每天 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11396", "content": "同学 们 要 栽 84 棵 树 ， 已经 栽 了 3 行 ， 每行 15 棵 ， 还 剩 多少 棵 没 栽 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11992", "content": "修路 队 要 修 一段 360 米 的 路 ， 第一周 修 了 全长 的 (2/9) ， 第 二 周 修 了 全长 的 (1/4) ． 两周 一共 修路 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16781", "content": "在 一个 罐子 内 有 3 种 不同 颜色 的 珠子 ， 其中 (2/5) 的 珠子 是 红色 的 、 (1/3) 的 珠子 是 绿色 的 、 其余 的 12 颗 珠子 是 黄色 的 ． 请问 这个 罐子 内 共有 多少 颗 珠子 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16381", "content": "小 芳 骑 自行车 每 小时 行 12 千米 ， 是 一辆 摩托车 每 小时 行 的 (3/4) ． 一辆 摩托车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4723", "content": "一 种 彩色 电视机 ， 现在 每 台 2150 元 ， 比 原来 每 台 降价 350 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3606", "content": "有 20 吨 货物 ， 如果 每次 运走 它 的 25% ， 则 多少 次 可以 运 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4270", "content": "小 明 妈妈 从 超市 买 回 面粉 和 大米 各 一袋 ， 每 袋 5 千克 ， 共用 23.5 元 ， 每千克 面粉 1.9 元 ， 每千克 大米 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2862", "content": "已知 x = 5 ， y = 8 ， 那么 4.8 x - 3 y = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8499", "content": "两棵 大树 相距 20 米 ， 要 在 这 两棵 大树 之间 每隔 2 米 栽 一棵 月季花 ， 一共 要 载 多少 棵 月季花 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9210", "content": "甲 、 乙 两车 同时 从 相距 420 千米 的 a 、 b 两地 相对 开出 ， 5 小时 后 甲 车行 了 全程 的 (3/4) ， 乙 车行 了 全程 的 (2/3) ， 这时 两车 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1641", "content": "笑笑 阅读 一本 280 页 的 故事书 ， 第一天 读 了 全书 的 (1/4) ， 第 二 天 读 了 全书 的 (1/7) ， 还 剩下 多少 页 没有 读完 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16147", "content": "多少 吨 的 45% 是 34 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "733", "content": "一 个 工厂 已经 加工 了 一批 零件 的 80% ， 还 剩 24 个 ． 这 批 零件 要 加工 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22828", "content": "一 个数 的 (4/5) 是 (16/7) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21284", "content": "妈妈 将 5000 元 人民币 存入 银行 ， 定期 一年 ， 年利率 2.25% ， 利息税 5% ． 到期 后 ， 妈妈 可 从 银行 取回 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "1145", "content": "菜场 用 相同 的 卡车 运 蔬菜 ． 先 用 4 辆车 共 运走 了 640 箱 ， 再 用 3 辆车 就 可 全部 运 完 ． 菜场 一共 运 了 多少 箱 蔬菜 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1082", "content": "一 个数 的 (3/5) 比 它 的 40% 多 120 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14137", "content": "在 一道 有 余数 的 除法 中 ， 除数 和 商都 是 9 ， 余数 是 7 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9242", "content": "一 家 超市 平均 每月 的 营业额 为 150000 元 ， 按 10% 的 营业额 缴纳 营业税 ， 每月 应 缴纳 营业税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21247", "content": "一 个 圆柱 的 底面 直径 是 8 厘米 ， 它 的 侧面 展开 正好 是 一个 正方形 ， 这个 圆柱 的 高 = 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9465", "content": "宝 丽 电视机厂 上半年 已 生产 了 150000 台 电视机 ， 正好 完成 全年 计划 的 (3/5) ， 全年 计划 生产 多少 台 电视机 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23051", "content": "“ 5 一 ” 节假 期间 ， 王老师 带领 他 的 40 名 学生 看 了 一场 精彩 的 球 幕 立体电影 ， 每张 电影票 35 元 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16640", "content": "从 9000 里面 减去 多少 个 240 ， 得 1800 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22634", "content": "幼儿园 买 了 48 个 白 皮球 ， 24 个 花 皮球 ， 平均 分给 9 个 班 ， 每班 分 得 几个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10381", "content": "小 莉 看 一本 趣味 数学 故事书 ， 如果 每天 看 36 页 ， 10 天 看 完 ； 如果 每天 多 看 4 页 ， 可以 提前 几天 看 完 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8964", "content": "一 种 电视 降价 200 元 后 ， 现在 售价 1800 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12692", "content": "把 0.025 扩大 100 倍 后 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9947", "content": "盒子 里 有 同样 的 绿 球 和 黄 球 ， 每次 取出 6 个 绿 球 和 4 个 黄 球 ， 去 了 若干次 后 ， 盒子 里 黄 球 比 绿 球 多 36 个 ． 一共 取 了 多少 次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "631", "content": "比 0.7 大 3.2 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21086", "content": "a 是 b 的 (2/3) ， b 是 c 的 (1/5) ， 如果 c 是 45 ， 那么 a = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1897", "content": "一 辆 汽车 0.6 小时 行驶 30.6 千米 ， 用 同样 的 速度 从 甲地 开往 乙地 ， 行驶 了 5.32 小时 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8966", "content": "96 里 有 多少 个 6 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21623", "content": "一 双 男式 皮鞋 原 售价 是 250 元 ， 现在 售价 是 170 元 ， 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3264", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 以 每 小时 72 千米 的 速度 行驶 了 4 小时 ， 返回 时 行驶 了 3 小时 ， 这辆 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13105", "content": "校园 里 有 杨树 30 棵 ， 柳树 是 杨树 的 (5/6) ， 槐树 是 柳树 的 (3/5) ． 问 槐树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22052", "content": "圆 湖 周长 108 米 ， 在 湖边 每隔 12 米 种植 一棵 柳树 ， 再 在 两棵 柳树 之 问 等 距离 地 种 3 棵 桃树 ， 这样 可 种 柳树 和 桃树 共 多少 棵 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6980", "content": "已知 ： 苹果 4 千克 6 元 ， 桔子 5 千克 11 元 ， 王 叔叔 买 16 千克 苹果 和 20 千克 桔子 ， 共 应付 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21872", "content": "一 桶 油漆 重 8 千克 ， 用 去 (5/6) ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15381", "content": "蔬菜 店 运进 16 筐 西红柿 ， 每 筐 重 28 千克 ， 运进 的 西红柿 共 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2908", "content": "(11/15) 里 有 多少 个 (1/30) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7504", "content": "果园 里 有 桃树 385 棵 ， 苹果树 的 棵 树 是 桃树 的 4 倍 ， 桃树 和 苹果树 一共 有 多少 棵 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1232", "content": "张 阿姨 经营 着 一个 体育 用品商店 ． 一次 ， 她 购进 了 一批 皮球 ， 进价 是 每个 6 元 ， 打算 以 每个 8 元 的 价格 卖出 ． 实际上 她 在 原定 卖价 的 基础 上 打 0.9 卖出 ， 当 这 批 皮球 全部 卖出 后 ， 张 阿姨 共 获 利润 216 元 ． 问 ： 张 阿姨 买进 的 这 批 皮球 一共 有 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18995", "content": "班级 买来 36 m 长 的 彩带 ， 用 它 的 (1/6) 扎 蝴蝶结 ， 它 的 (1/3) 编 中国 结 ， 求 还 剩 多长 的 彩带 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20738", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 14 小时 行 了 全程 的 (7/9) ， 还 需 几小时 才能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6309", "content": "小 红 有 邮票 25 张 ， 小 军 有 45 张 ， 小 红 的 邮票 是 小 军 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8375", "content": "小 明 、 小 英 、 小 兰 、 小强 4 位 同学 都 有 一些 课外书 ， 小 明 的 书本 数 是 小 英 的 6 倍 ， 小 英 的 书本 数 是 小 兰 的 3 倍 ， 小强 的 书本 数 是 小 兰 的 9 倍 ． 小 明 的 书本 数 是 小强 的 多少倍 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20757", "content": "两列 火车 从 相距 1260 千米 的 两站 同时 开出 相向 而 行 ， 4.5 小时 后 两车 相遇 ． 慢车 每 小时 行 120 千米 ， 快车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15082", "content": "学校 买 了 一批 图书 ， 其中 35% 分给 低年级 ， 其 佘 的 按 7 ： 6 分给 中 、 高年级 ， 已知 低年级 比 高年级 多 20 本 ， 学校 一共 买 图书 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "5857", "content": "一 本 故事书 有 300 页 ， 李强 看 了 8 天 后 ， 还 剩 60 页 ， 他 平均 每天 看 几页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9071", "content": "大米 每千克 1.5 元 ， 小 明 的 妈妈 买 了 35 千克 ， 她 付给 营业员 60 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5592", "content": "一 根 铁丝 ， 第一 剪 去 (3/8) ， 第 二 次 剪 去 与 第一次 同样 多 ， 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3658", "content": "青岛 到 北京 的 铁路 长 约 900 千米 ， 动车 2 小时 行驶 了 全程 的 (1/4) ． 照 这样 计算 ， 乘坐 动车 从 青岛 到 北京 大约 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6359", "content": "果园 里 种 了 72 棵 桃树 ， 是 梨树 棵 数 的 8 倍 ， 种 的 梨树 和 桃树 一共 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1304", "content": "某 数 减去 30 ， 然后 扩大 5 倍 ， 再 加上 20 等于 270 ， 这个 数 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4106", "content": "将 一根 长 12 米 的 木条 锯 成 了 8 小 段 ， 每 锯下 一段 要 用 3 分钟 ， 全部 锯 完 要 用 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10996", "content": "小 华 用 100 元 钱 买 了 3 个 书包 ， 找回 16 元 ， 每个 书包 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16279", "content": "一 段 公路 ， 第一天 修 了 (2/5) ， 第 二 天 修 了 (1/4) ， 还 剩 (5/8) 千米 ， 这 段 公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6637", "content": "一 块 正方形 地 的 面积 是 20 平方米 ， 整修 后 面积 增加 了 (1/10) ． 这时 这块 正方形 地 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12976", "content": "把 一根 底面 直径 是 2 分 米 的 圆 型 钢材 截 成 两段 ， 表面积 增加 了 多少 平方分米 ．", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "1229", "content": "多少 除以 2.7 的 商 是 0.08 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3714", "content": "小胖 看见 闪电 后 ， 过 了 5.2 秒 才 听到 雷声 ． 已知 雷声 在 空中 传播 的 速度 是 0.33 千米 / 秒 ． 闪电 的 地方 离 小胖 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17196", "content": "一 只 大钟 ， 分钟 长 60 厘米 ， 2 个 小时 后 ， 分针 的 尖端 走 了 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6617", "content": "一 个数 减去 它 的 20% 后 ， 等于 120 的 (1/3) ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "755", "content": "0.8 / 3 / (9/20) * (3/2) / 0.64 * 27.9 = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "23138", "content": "商场 运 来 610 千克 苹果 ， 上午 卖出 152 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22581", "content": "有 一块 平行四边形 的 花圃 ， 底 长 50 米 ， 高 长 30 米 ． 每平方米 产 鲜花 60 枝 ， 这块 花圃 共 可 产 鲜花 多少 枝 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9514", "content": "一 段 木料 锯 成 3 段 要 6 分 ， 如果 要 锯 成 5 段 ， 需要 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14439", "content": "油菜籽 的 出油率 是 42% ， 一个 榨油厂 榨出 菜籽油 2100 千克 ， 需要 多少 千克 的 油菜籽 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10209", "content": "（ 112233 - 112.233 ） / （ 224466 - 224.466 ） = ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17612", "content": "某 小区 一块 1200 平方米 的 空地 ， 种花 的 面积 是 这块 地 的 (2/5) ， 种树 的 面积 是 种花 面积 的 (5/6) ， 种树 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15163", "content": "一 部手机 打 0.85 出售 ， 便宜 了 180 元 ． 这 部手机 打折 前 的 售价 为 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15546", "content": "家具厂 上个月 生产 单人 木床 1500 张 ， 双人 木床 1850 张 ， 铁床 2500 张 ， 铁床 比 木床 少 生产 多少 张 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4188", "content": "甲 、 乙 两 人 从 相距 120 米 的 两地 相同 方向 行驶 ， 甲 车 每 分行 58 米 ， 乙 车 每 分行 34 米 ， 多少 分钟 后 甲 追 上 乙 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23", "content": "学校 购买 每张 单价 是 140 元 的 课桌 ， 买 了 30 张 还 多 480 元 ． 如果 用 这笔 钱 买 椅子 ， 可以 买 40 把 ． 每 把 椅子 的 单价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7055", "content": "“ 5 一 ” 期间 ， 新华书店 所有 少儿 图书 打 0.8 出售 ． 小 华 买 了 一套 图画书 ， 花 了 72 元 ． 这 套 图画书 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9194", "content": "小 华 看 一 本书 ， 每天 看 20 页 ， 6 天 后 还 剩 全书 的 40% ， 这 本书 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22196", "content": "某班 有 37 人 去 旅行 ， 戴帽子 的 有 20 人 ， 穿 短裤 的 有 28 人 ， 问 其中 最 多 有 几 人 同时 戴帽子 及 穿 短裤 的 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3662", "content": "建 一座 教学楼 ， 实际 投资 325 万元 ， 比 计划 节约 了 (1/6) ， 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5434", "content": "磁悬浮列车 运行 速度 可 达 430 千米 / 时 ， 普通 列车 比 它 慢 (36/43) ． 磁悬浮列车 每 小时 比 普通 列车 每 小时 多行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15256", "content": "一 个 长 5 dm ， 宽 4 dm ， 高 3 dm 的 铁桶 装有 1 dm 高 的 水 ， 放入 一块 石头 的 水面 升高 到 2.5 dm ， 石头 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5736", "content": "买 一条 裙子 125 元 ， 相当于 买 5 双 鞋 的 价钱 ． 买 一条 裙子 比 买 一双 鞋 多付 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5945", "content": "张老师 把 50000 元 存入 银行 ， 定期 3 年 ， 准备 到期 后 把 利息 捐赠 给 贫困地区 的 “ 特困生 ” ． 如果 年利率 按 3.62% 计算 ， 到期 后 他 可 捐出 多少 元 ？ （ 免 利息税 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8799", "content": "(1/152) + (1/304) + (1/608) + (1/1216) + (1/2432) = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "17994", "content": "(9/2) 减去 一个 数 等于 3 ， 这个 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20036", "content": "运输队 运 一批 货物 ， 第一次 运走 这 批 货物 的 (2/5) ， 第 二 次 运走 40 吨 ， 这时 还 剩下 110 吨 货物 没有 运 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8916", "content": "一 辆 轿车 每 小时 行 95 千米 ， 4.8 小时 到达 目的地 ． 如果 每 小时 行 80 千米 ， 需要 多少 小时 到达 目的地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6151", "content": "要 做 20 个 套圈 ， 半径 为 4 厘米 ， 结 头 处 要 留 2 厘米 ， 需要 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "13301", "content": "王 理 的 体重 是 28 千克 ， 爸爸 的 体重 比 他 的 3 倍 少 25 千克 ， 王 理 和 爸爸 共 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3155", "content": "把 一段 长 (9/10) 米 的 钢管 锯 成 若干 相等 的 小 段 ， 一共 锯 了 3 次 ， 平均 每 段 钢管 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1176", "content": "桑 尼 这 两天 在 看 一本 叫 《 蜡笔小新 》 的 书 ， 昨天 看 了 全书 的 (2/5) ， 今天 看 了 42 页 ， 正好 剩下 全书 的 25% 设 看 ． 这本 《 蜡笔小新 》 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5451", "content": "一年级 有 学生 132 人 ， 二年级 学生 人数 是 一年级 的 3 倍 ， 一 、 二年级 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10230", "content": "汽车 以 同样 的 速度 上午 行 360 千米 ， 下午 行 270 千米 ， 上午 比 下午 多行 2 小时 ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6052", "content": "挖 一个 长 5 m 、 宽 4 米 、 深 2.5 m 的 长方体 水池 ， 这个 水池 的 占地面积 至少 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7659", "content": "广场 中央 有 一个 半径 10 m 的 圆形 花坛 ， 这个 花坛 的 占地面积 = 多少 m ^ 2 ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "8773", "content": "6.5 与 2.6 的 和 乘以 8.9 ， 再 加上 3.21 ， 得到 的 和 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17313", "content": "一 根 钢管 长 6 米 ， 用 去 (1/3) 后 ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10650", "content": "一 根 10 米 长 的 钢材 第一次 截下 它 的 (2/5) ， 第 二 次 截下 它 的 (1/2) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9259", "content": "仓库 里 有 货物 750 吨 ， 第一次 运走 全部 货物 的 (1/3) ， 第 二 次 运走 全部 货物 的 40% ， 仓库 里 剩下 的 货物 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21009", "content": "有 12 箱 草莓 ， 每箱 取 走 5 千克 ， 剩下 的 只 够 装 成 与 原来 同样 重 的 8 箱 ． 原来 每箱 草莓 重 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "803", "content": "乐乐 买 书 用 去 8.55 元 ， 买 钢笔 用 去 3.2 元 ， 付给 售货员 15 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10970", "content": "希望 小学 四年级 有 学生 160 人 ， 是 五年级 人数 的 (8/9) ， 五年级 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12218", "content": "一 筐 梨 ， 梨 和 筐 共 重 32 千克 ， 卖出 梨 的 (2/3) ， 剩下 的 梨 和 筐 共 重 12 千克 ， 原来 的 梨 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3320", "content": "516 - 318 的 差 乘 32 + 58 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18737", "content": "（ ） / 9 = ○ … □ ， □ 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7948", "content": "一 个 边长 为 8.4 厘米 的 正方形 铁皮 ， 从中 挖 去 一块 面积 为 40.5 平方厘米 的 铁皮 ， 剩下 的 铁皮 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23061", "content": "三年级 的 学生 去 春游 ． 女生 有 56 人 ， 男生 有 64 人 ． 6 名 学生 分成 一组 ， 一共 可以 分 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9480", "content": "六年级 一班 有 50 人 参加 数学考试 ， 结果 2 人 不 达标 ， 达标 的 人数 占 参加考试 人数 的 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1786", "content": "两 人 在 同一 起点 练习 赛跑 ， 甲 每秒 跑 7 米 ， 乙 每秒 跑 8 米 ． 如果 甲 先 跑 3 秒 ， 几秒钟 后 乙 可 追 上 甲 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18249", "content": "一 本书 读 了 60% ， 比 没 读 的 多 80 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11930", "content": "苹果 每千克 2 元 ， 爸爸 用 了 30 元 钱 买回来 的 苹果 ， 平均 分给 我们 3 弟兄 ， 每人 分 得 几千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19021", "content": "在 一个 上 底 为 12 cm 、 下 底 为 18 cm 、 高 是 8 cm 的 梯形 硬纸板 中 剪 去 一个 边长 分别 为 3 cm 、 4 cm 、 5 cm 的 直角三角形 ， 剩下 部分 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4763", "content": "某 数 的 60% - (7/15) ， 与 (4/5) * (2/3) 的 积 相等 ， 某 数 是 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "517", "content": "李 红 家 上 月 用电 45 千瓦时 ， 这个 月 节约 了 20% ， 这个 月 用电 多少 千瓦时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11344", "content": "同学 们 在 全长 120 米 的 小路 一边 植树 ， 每隔 4 米 栽 一棵 （ 两端 都 要 栽 ） ． 一共 要 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5275", "content": "把 1 吨 平均 分成 4 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10512", "content": "某 小学 共有 学生 1075 人 ， 其中 六年级 有 215 人 ． 六年级 学生 人数 是 全校 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19375", "content": "光明 小学 五年级 人数 是 六年级 的 (2/3) ， 六年级 的 人数 是 全校 人数 的 (1/5) ， 全校 有 810 人 ， 五年级 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11208", "content": "实验 小学 绿化 校园 ， 原 计划 每天 铺 草坪 26.5 平方米 ， 4.5 天 铺 完 ， 实际 只用 了 3 天 就 完成 了 任务 ， 实际 每天 比 计划 多 铺 多少 平方米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11843", "content": "商店 售出 2 筐 苹果 ， 每 筐 36 千克 ， 占 售出 水果 总数 的 (3/8) ． 售出 的 梨 占 水果 总数 的 (7/48) ， 售出 梨 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7800", "content": "校运会 期间 ， 在 周长 400 米 的 环形 跑道 上 ， 每隔 8 米 插 一面 红旗 ， 然后 在 相邻 两面 红旗 之间 每隔 2 米 插 一面 黄旗 ， 则 共 插 黄旗 多少 面 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3656", "content": "牛奶 厂 第一季度 生产 牛奶 15000 箱 ， 第 二 季度 比 第一季度 增产 了 (1/4) ， 前半年 共 生产 了 多少 箱 牛奶 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14295", "content": "一 个 小商店 ， 以 每盒 16 元 的 价钱 购进 30 盒 录音磁带 ， 然后 以 每盒 20 元 的 价钱 卖出去 ， 卖完 后 可以 净赚 多少 元 ？ （ 除去 车费 、 税费 等 开支 25 元 ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13502", "content": "修路 队 要 修 一条 120 千米 的 公路 ， 已经 修 了 40 天 ， 每天 修 1.2 千米 ， 余下 的 30 天 修 完 ， 平均 每天 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11454", "content": "班级 进行 跳高 测验 ， 小 明 跳 了 1.24 米 ， 小 伟 跳 的 比 小 明 高 0.13 米 ． 小 华 跳 的 比 小 伟 矮 0.02 米 ， 小 华 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7701", "content": "甲乙 二 人 共同 生产 540 个 零件 ， 他们 共同 生产 了 5 个 小时 后 ， 还 差 25 个 没 生产 ， 已知 甲 每 小时 生产 45 个 ， 乙 每 小时 生产 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13588", "content": "小 华 在 水果店 买 水果 ， 苹果 每千克 4.6 元 ， 橙子 每千克 5.4 元 ． 如果 苹果 和 橙子 各 买 3.7 千克 ， 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17758", "content": "计算 ： 784070 + 78407.1 + 7840.72 + 784.073 + 78.4074 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "17157", "content": "小 华 今年 开学 把 过年 所得 的 压岁钱 2000 元 存入 教育 储蓄 专户 ， 定期 一年 ， 准备 到期 后 把 利息 赠给 “ 希望工程 ” ， 支援 贫困地区 的 失学 儿童 ． 如果 年利率 按 2.5% 计算 ， 到 明年 开学 存 满 一年 后 可 捐给 “ 希望工程 ” 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9198", "content": "5 台 磨面 机 8 小时 磨面 52 吨 ， 平均 每 台 磨面 机 每 小时 磨面 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20580", "content": "贸易市场 运 来 梨子 3000 千克 ， 卖出 40% ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22590", "content": "小 明 前几次 数学 测验 的 平均分 是 80 分 ， 最近 这次 测验 如果 是 100 分 ， 他 的 平均分 就 会 提高 到 84 分 ． 那么 ， 最近 这次 测验 是 第 多少 次 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22382", "content": "3 （ 1 ） 班 48 名 同学 去 游乐园 ， 每人 买 一张 37 元 的 门票 ， 共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7756", "content": "一 列 火车 4 小时 行驶 392 千米 ， 照 这样 计算 ， 12 小时 可行 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4003", "content": "有 一桶 油 两次 用 完 ， 第一次 用 去 这 桶 油 的 60% ， 第 二 次 用 的 比 第一次 少 用 20 千克 ， 这 桶 油 原来 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2833", "content": "6 （ 5 ） 班 84 名 同学 在 期末 检测 中 ， (1/3) 的 同学 得 “ 优 ” ， (1/2) 的 同学 得 “ 良 ” ， (1/7) 的 同学 得 “ 及格 ” ， 不及格 的 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8459", "content": "一 条 绳 长 2 米 ， 剪 去 (4/5) 米 ， 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12768", "content": "学校 组织 同学 去 博物馆 参观 ． 三年级 去 了 62 人 ， 四年级 去 的 人数 是 三年级 的 2 倍 ． 两个 年级 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18432", "content": "一 长方形 花圃 的 面积 是 18 平方米 ， 宽 是 3 米 ， 那么 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7265", "content": "公交车站 起点站 每隔 5 分钟 开出 一辆 汽车 ， 当 开出 第 9 辆车 时 ， 一共 经过 了 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7877", "content": "学校 要 做 1500 面 彩旗 ， 把 这个 任务 交给 25 个 班 ， 每班 有 4 个 组 ， 平均 每组 座机 面 彩旗 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19823", "content": "甲 数 是 乙 数 的 (1/2) ， 乙 数 是 丙 数 的 (1/3) ， 甲 数 是 丙 数 的 多少 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15040", "content": "一 堆 沙 运走 的 吨数 与 总 吨数 的 比 是 (3/7) ， 剩下 的 比 运走 的 多 2.1 吨 ， 这 堆 沙 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2633", "content": "小迷糊 遇到 了 一道 难题 ： “ 一个 数 减去 16 + 24 ， 再 除以 7 最后 得 36 ． ” 你 能 帮助 小迷糊 求 出 这个 数 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8341", "content": "商店 卖 一件 衣服 售价 为 60 元 ， 比 原价 便宜 20% ， 比 原来 便宜 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14881", "content": "一 袋 大米 40 千克 ， 吃 了 总数 的 (3/4) ， 还 剩 总数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10963", "content": "一 个 长方体 水池 ， 长 20 米 ， 宽 10 米 ， 高 2 米 ． 在 池内 的 侧面 和 池底 抹 一层 水泥 ， 抹 水泥 的 面积 = 多少 平方米 ．", "knowledge": ["*", "+"], "difficulty": 0.6, "length": 15}
-{"question_id": "22030", "content": "甲乙 两城 相距 297 千米 ， 一辆 汽车 从 甲 城 开 住 乙 城 ， 1.5 小时 行驶 了 81 千米 ． 照 这样 的 速度 ， 余下 的 路程 还要 行驶 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17224", "content": "松鼠 妈妈 采 松子 ， 晴天 每天 采 20 个 ， 雨天 每天 可 采 12 个 ， 它 一连 采 了 112 个 ， 平均 每天 采 14 个 ， 这 几天 中 有 多少 天 是 雨天 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14378", "content": "仓库 里 有 10 吨 钢材 ， 第一次 用 去 总数 的 (1/5) ， 第 二 次 用 去 (3/4) 吨 ， 两次 共用 去 钢材 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1645", "content": "一 堆 煤 ， 每天 运走 这 堆 煤 的 (1/5) ， 多少 天 可 运 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12693", "content": "客车 和 货车 同时 从 东 、 西 两城 相对 开出 ， 4 小时 相遇 ， 相遇 后 客车 又 行 3 小时 到达 西城 ， 货车 平均 每 小时 行 全程 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13778", "content": "学校 图书馆 购进 科技 书 80 本 ， 比 购进 的 故事书 少 20% ． 学校 图书馆 购进 故事书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16490", "content": "4 吨 葡萄 在 新疆 测 得 含水量 99% ， 运抵 南京 后 测 得 含水量 是 98% ， 问 葡萄 运抵 南京 后 还 剩 几吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7933", "content": "张 阿姨 参加 来宾市 新型农村 合作 医疗保险 后 ， 因 患 胃炎 在 本乡 医院 住院治疗 ， 医疗费 共计 1850 元 ． 医疗保险 条款 规定 ： 住院 医疗费 超过 50 元 的 部分 按 75% 补偿 ． 张 阿姨 这次 生病 获得 补偿 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8617", "content": "同学 们 排成一列 做 游戏 ， 小 华 前边 的 同学 占 总 人数 的 (3/5) ， 后边 的 同学 占 总 人数 的 (1/3) ， 从前 往后 数 ， 小 华 排 在 第 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9575", "content": "学校 买来 200 本 故事书 ， 占 买来 科技 书 的 (4/5) ， 买来 的 科技 书 和 故事书 一共 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9684", "content": "一 批 零件 有 600 个 ， 第一天 完成 了 全部 的 (3/10) ， 第 二 天 完成 了 全部 的 (1/6) ， 两天 一共 完成 了 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2648", "content": "(1/3) 与 它 倒数 的 和 去除 20 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17280", "content": "一 辆 卡车 运送 化肥 ， 上午 3 次 运 了 4560 千克 ， 下午 4 次 运 了 6500 千克 ， 下午 每次 比 上午 多 运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12416", "content": "同学 们 做 广播操 ， 每行 站 15 人 ， 正好 站 4 行 ． 如果 站 5 行 ， 每行 站 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15262", "content": "家庭财产 每年 保险费率 为 0.3% ， 若 保险金额 为 8000 元 ， 则 每年 需 交纳 保险费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17675", "content": "一 块 平行四边形 的 耕地 ， 底 长 45 米 ， 是 高 的 3 倍 ， 这块 耕地面积 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19266", "content": "3 年前 爸爸 的 年龄 是 儿子 的 3 倍 ， 爸爸 今年 45 岁 ， 儿子 今年 多少岁 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3458", "content": "小 明 骑 自行车 以 每 小时 20 公里 的 速度 由 a 城市 直奔 b 城市 ， 同时 小强 以 每 小时 15 公里 的 速度 由 b 开往 a ． 如果 有 一只 鸟 ， 以 30 公里 每 小时 的 速度 与 他们 同时 起动 ， 并且 从 a 城市 出发 ， 碰到 另 一个 人 时 就 按 相反 的 方向 返回 去 飞 ， 就 这样 依次 在 两 人 之间 来回 地 飞 ， 直到 他们 相遇 ， 如果 ab 相距 14 公里 ， 那么 这 只 小鸟 飞行 了 多少 公里 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14704", "content": "做 一个 不 带 盖 的 长方体 水桶 ， 底面 是 边长 为 3 分 米 的 正方形 ， 高 是 4 分 米 ， 问 至少 需要 多少 平方分米 的 铁皮 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15755", "content": "甲乙 两车 从 a 地 到 b 地 ， 甲 车行 完全 程 要 6 小时 ， 乙 车 速度 是 甲 车 速度 的 80% ， 已知 甲 车 速度 是 每 小时 60 千米 ， 乙 车行 完全 程 要 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20974", "content": "甲 数 是 56.2 比 乙 数多 4.8 ， 甲乙 两 数 的 和 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13384", "content": "平均 每个 鸡蛋 大约 重 0.06 千克 ． 1 筐 鸡蛋 重 15 千克 ， 这 筐 鸡蛋 大约 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8385", "content": "挖 一个 长 、 宽 、 高 分别 是 8 米 、 6 米 、 2 米 的 长方体 水池 ． 如果 把 水池 的 4 周 和 底面 贴 上 瓷砖 ， 贴 瓷砖 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "8719", "content": "某人 沿 一条 长 为 12 千米 的 路上 山 ， 又 从 原 路 下山 ． 上山 时 的 速度 是 每 小时 2 千米 ； 下山 时 的 速度 是 每 小时 6 千米 ． 那么 ， 他 在 上 、 下山 全过程 中 的 平均速度 是 每 小时 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9704", "content": "学校 买 了 3 箱 篮球 ， 每箱 6 个 ， 还 买 了 9 个 皮球 ， 学校 买 了 多少 个 篮球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6311", "content": "王老师 3 分钟 能 打 246 个 字 ， 照 这样 的 速度 ， 打 2050 个 字 的 一篇 文章 需 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19841", "content": "一 项 工程 实际 投资 18 万元 ， 比 原 计划 节约 2 万元 ． 节约 了 百分之 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9434", "content": "小强 看 一 本书 ， 每天 看 15 页 ， 4 天 后 加快进度 ， 又 看 了 全书 的 (2/5) ， 还 剩下 30 页 ， 这本 故事书 有 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "204", "content": "3 - 2 / 6 的 商 ， 再 加上 5 ， 结果 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3451", "content": "一 条 公路 ， 甲 修 了 (4/5) 千米 ， 乙 修 了 (1/4) 千米 ， 丙 修 的 比 甲 、 乙 两队 总和 的 2 倍 少 (3/8) 千米 ， 丙 队 修 了 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10039", "content": "一 本 故事书 ， 晓 静 第一天 看 了 全书 的 15% ， 第 二 天 看 了 全书 的 20% ， 两天 共 看 了 63 页 ． 这本 故事书 一共 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5767", "content": "大小 齿轮 齿 数 的 比 是 5 ： 3 ， 小齿轮 有 15 个 齿 ， 大 齿轮 有 多少 个 齿 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15396", "content": "学校 新 买 了 3 箱 排球 ， 每箱 装 12 个 ， 每个 排球 的 价格 是 42 元 ． 一共 花 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5475", "content": "含盐 5% 的 盐水 400 克 ， 加水 稀释 成 含盐 4% 的 盐水 ， 需 加水 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9424", "content": "鸡场 养 有 大 鸡 1200 只 ， 是 中 鸡 的 (6/7) ， 中 鸡 是 小鸡 的 (5/8) ， 小鸡 有 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2489", "content": "妹妹 说 ： 我 割草 28 千克 ； 哥哥 说 ： 我 割 的 草 比 你 的 3 倍 少 9 千克 ． 请问 同学 们 ， 哥哥 割 了 多少 千克 草 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16454", "content": "一 根 竹竿 长度 等于 自身 长度 的 (3/4) + (2/5) 米 ， 这根 竹竿 全长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5662", "content": "有 一个 圆柱体 ， 底面 直径 10 cm ， 若 高 增加 2 cm ， 则 侧 面积 增加 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9931", "content": "实验 小学 一年级 有 男生 378 人 ， 女生 356 人 ． 已经 体检 的 有 597 人 ， 没 体检 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13013", "content": "一 套 西服 原价 350 元 ， 商家 搞 活动 后 打 0.8 出售 ， 这 套 西服 打折 后 降低 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7053", "content": "检修 一条 长 583 千米 的 铁路 ， 甲队 从 它 的 南端 开始 ， 每天 检修 23 千米 ． 甲队 开工 1 天 后 ， 乙 队 从 它 的 北端 开始 ， 每天 检修 47 千米 ． 再 过 几天 ， 甲 、 乙 两队 刚好 检修 完 这 条 铁路 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2799", "content": "师徒 二 人 同时 加工 零件 198 个 ， 计划 6 小时 完成 ， 徒弟 每 小时 加工 15 个 ， 师傅 每 小时 至少 加工 多少 个 零件 才能 按时 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13933", "content": "两列 火车 从 甲 、 乙 两地 同时 相对 开出 ， 快车 每 小时 行 80 千米 ， 慢车 时速 为 快车 的 (3/5) ， 两车 经过 3 小时 相遇 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16610", "content": "杭州 地铁 施工 某地 段长 12 千米 ， 前 3 天 施工 完成 1.5 千米 ， 照 这样 计算 ， 完成 这 一路 段 还要 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15622", "content": "植树节 里 ， 六年级 同学 比 三年级 同学 多 植树 60 棵 ， 三年级 同学 植 的 棵 数 是 六年级 的 (3/5) ， 六年级 同学 共 植 了 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "627", "content": "妈妈 买 一件 衣服 花 了 132 元 ， 是 买 一条 裤子 的 2 倍 ， 妈妈 买 这 套 衣服 共 花 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21833", "content": "一 个 加数 是 739 ， 和 是 1729 ， 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "624", "content": "王老师 带 3 （ 1 ） 班 35 名 学生 去 动物园 ． 动物园 成人 票 20 元 一张 ， 学生票 10 元 一张 ， 买 门票 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2117", "content": "一 列 火车 长 180 米 ， 每秒 行 20 米 ， 这 列 火车 通过 320 米 长 的 大桥 ， 需要 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4440", "content": "某 单位 用 4 辆 同样 的 卡车 5 次 为 希望 小学 募捐 图书 2800 箱 ， 平均 每辆 卡车 每次 运 图书 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22489", "content": "有 一条 公交线路 每隔 2 千米 就 有 1 个 车站 ． 一辆 汽车 在 起点站 有 5 个 乘客 上车 ； 途中 各站 都 有 3 个 乘客 下车 ， 8 个 乘客 上车 ， 到 终点站 有 45 个 乘客 下车 ． 这辆 汽车 从 起点 到 终点 共 行驶 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14691", "content": "一 个数 增加 20% 后 是 (3/5) ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19522", "content": "万盛 到 长沙 相距 600 千米 ． 卡车 以 每 小时 80 千米 行 了 3 小时 ． 剩下 的 路程 要 4 小时 走 完 ， 卡车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6262", "content": "一 个 长方体 的 体积 是 60 d ㎡ ， 长 6 dm ， 宽 5 dm ， 高 = 多少 dm ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17154", "content": "一 段 公路 上 ， 每隔 40 米 有 一根 水泥 电线杆 ， 共有 121 根 ， 后来 改用 水泥 电线杆 51 根 ， 这时 两根 水泥 电线杆 的 距离 = 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4051", "content": "水果店 运 来 40.8 千克 苹果 ， 运 来 的 梨 比 苹果 的 1.5 倍 少 15 千克 ， 运 来 梨 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14856", "content": "商店 里 有 红 气球 206 个 ， 黄 气球 比 红 气球 多 95 个 ， 蓝 气球 比 黄 气球 多 89 个 ． 商店 里 有 蓝 气球 多少 个 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1301", "content": "两个 加数 的 和 是 548 ， 已知 一个 加数 是 286 ， 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19187", "content": "打 一部 书稿 ， 第一天 打 了 32 页 ， 第 二 天 打 了 28 页 ， 这 两天 打 的 页数 占 着 部 书稿 的 (3/4) ， 这部 书稿 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15681", "content": "一 批 货物 20 吨 ， 每次 运走 它 的 (1/4) ， 多少 次 运 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1502", "content": "用 木料 做 一个 长 5 厘米 ， 宽 和 高 都 是 4 厘米 的 长方体 ， 至少 需要 多少 立方厘米 的 木料 ． 如果 要 在 长方体 木块 的 表面 涂 一层 油漆 ， 涂 油漆 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20331", "content": "新风 村 修 一条 路 ， 平均 每天 修 150 米 ， 修 了 4 天 ， 还 剩 80 米 没 修 ． 这 条 路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19703", "content": "星期日 ， 小 红 家 来 客人 ， 她 帮 妈妈 做 迎客 准备 ． 她 负责 烧 开水 、 洗 茶杯 、 檫 地 ， 所 需 时间 如下 ： 烧 开水 10 分 ， 洗 茶杯 5 分 ， 檫 地 8 分 ． 她 至少 需要 几分钟 干完 这些 事 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9829", "content": "修 一条 路 ， 已经 修 了 600 米 ， 正好 是 未 修 的 (2/3) ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "950", "content": "小 刚 和 小强 同时 从 同 一点 出发 ， 沿着 400 米 环形 跑道 向 相反 方向 慢跑 ， 小 刚 每分钟 跑 95 米 ， 小强 每分钟 跑 105 米 ． 几分钟 后 两 人 第一次 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18458", "content": "四年级 一班 的 同学 为 庆祝国庆 60 周年 ， 准备 用 红纸 和 黄纸 做 一些 5 星 红旗 ． 为此 ， 该班 同学 们 买来 了 红纸 和 黄纸 ， 由 班长 平均 发给 每 一个 同学 6 张 红纸 、 15 张 黄纸 ， 发给 18 个 同学 后 ， 忽然 发现 还 剩 122 张 ． 请 你 计算 这个 班 两种 纸 一共 买 了 多少 张 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "3084", "content": "妈妈 买来 4 块 肥皂 、 2 条 毛巾 共用 去 28 元 ， 已知 肥皂 每块 2.6 元 ， 毛巾 每 条 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1694", "content": "一 个 书架 共有 4 层 ， 如果 把 460 本 图书 平均 摆放 在 这样 的 5 个 书架上 ， 每层 应该 摆放 多少 图书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5841", "content": "一 辆 小轿车 可以 坐 5 人 ， 客车 坐 的 人数 是 小轿车 的 9 倍 ． 一辆 客车 比 一辆 小轿车 多 坐 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14745", "content": "比 4.35 少 1.8 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14364", "content": "学校食堂 购买 了 一堆 煤 ， 原 计划 每天 烧 1.25 吨 ， 可以 烧 16 天 ． 开展 节约 活动 后 ， 食堂 每天 可 节约 0.25 吨 ． 照 这样 计算 ， 这 堆 煤 可以 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8695", "content": "在 60.6 千克 药水 中 ， 药粉 和 水 的 比 是 1 ： 100 ， 其中 药粉 有 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22616", "content": "某 修理部 要 修 510 台 机器 ， 前 5 天 每天 修 60 台 ， 余下 的 3 天 修 完 ， 平均 每天 要 修 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5579", "content": "工程队 4 天 完成 了 一项 工程 的 (2/9) ， 完成 全 项 工程 需 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1088", "content": "从 一个 数里 减去 (11/18) 后 是 (5/18) ， 这个 数 是 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19524", "content": "甲 、 乙 两 人 的 步行 速度 之 比 是 5 ： 3 ， 两 人 分别 从 a 、 b 两地 同时 出发 ， 如果 相向 而 行 ， 1 小时 后 相遇 ； 如果 分别 从 a 、 b 两地 同时 同 向 而 行 ， 甲 需要 多少 小时 才能 追 上 乙 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22812", "content": "某 服装店 老板 ， 为了 提高 销售额 ， 先 将 所有 商品 提价 30% ， 然后 宣传 说 ： “ 本店 为 回收 资金 ， 所有 商品 0.8 优惠 ， 数量 有限 ， 欲购从速 ． ” 请 你 计算 ， 原来 标价 80 元 的 服装 ， 现在 实际 售价 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11796", "content": "有 一堆 货物 ， 第一天 运走 了 这 批 货物 的 (1/5) ， 第 二 天 运走 了 这 批 货物 的 (3/8) ， 剩下 的 货物 占 这 批 货物 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12258", "content": "师徒 共同 加工 一批 零件 ， 两天 后 ， 师傅 加工 了 总数 的 (2/5) ， 徒弟 加工 了 60 个 ， 正好 是 师傅 的 (5/6) ， 这 批 零件 共有 多少 个 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "749", "content": "一 根 木头 长 10 米 ， 把 它 锯 成 5 段 ， 每 锯 一次 需要 8 分钟 ， 多长时间 全部 锯 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "716", "content": "红光 小学 做 校服 ， 上衣 每件 52 元 ， 裤子 每 条 38 元 ， 准备 买 150 套 ， 共 需 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11535", "content": "一 堆 煤 用 载重 4 吨 的 汽车 运 需 20 辆 才能 一次 运 完 ， 如果 改用 载重 5 吨 的 汽车 运 ， 需要 几辆 才能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16431", "content": "汽车 的 速度 是 摩托车 的 1.5 倍 ， 汽车 行驶 360 千米 需要 4 小时 ． 摩托车 每 小时 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13127", "content": "人 心脏 跳动 的 次数 随 年龄 而 变化 ， 青少年 心跳 每分钟 约 75 次 ， 婴儿 每分钟 心跳 的 次数 比 青少年 多 80% ， 婴儿 每分钟 心跳 多少 次 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18448", "content": "永明 村 要 修 一条 长 4500 米 的 水渠 ， 已经 修 了 10 天 ， 还 剩 560 米 没 修 ． 已修 的 这 段 水渠 每天 修 了 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16169", "content": "修 一段路 ， 第一周 修 了 全长 的 10% ， 第 二 周 修 了 540 米 后 ， 已修 的 与 未 修 的 长度 比 是 9 ： 11 ． 这 段 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21095", "content": "一 块 梯形 钢板 ， 上 底 1.2 米 ， 下 底 2 米 ， 高 1.1 米 ， 如果 每平方米 钢板 重 25 千克 ， 这块 钢板 重 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8662", "content": "王 大伯 把 一根 长 3 米 的 竹竿 垂直 插入 自家 的 鱼塘 中 ． 竹竿 的 入 泥 部分 是 0.5 米 ， 露出 水面 的 部分 是 0.75 米 ． 鱼塘 水深 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2385", "content": "333 * 44 + 666 * 16 + 999 * 8 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "16089", "content": "压路机 的 滚筒 是 一个 圆柱体 ， 它 的 底面 直径 是 1 米 ， 长 1.8 米 ． 每 滚动 一周 能 压 多 大面积 的 路面 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19202", "content": "张老师 一次 稿酬 所得 是 3500 元 ， 按照 国家 税法 规定 ， 超过 1600 元 的 部分 应 按 20% 的 税率 缴纳 个人所得税 ． 张老师 应 缴纳 的 个人所得税 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13258", "content": "一 头 大象 的 重量 等于 8 头牛 的 重量 ， 这 头牛 的 体重 是 605 千克 ， 大象 的 体重 = 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2237", "content": "一 本 数学 书 4.25 元 ， 比 一本 故事书 便宜 1.27 元 ， 买 一本 数学 书 和 一本 故事书 共 花 几元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10781", "content": "佳佳 水果店 运进 桔子 48 箱 ， 运进 的 苹果 比 桔子 多 10 箱 ， 一共 运进 水果 多少 箱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6412", "content": "一 个 箱子 里 装满 了 实心球 ， 连 箱子 共 重 12 千克 ， 从 箱子 中 取出 实心球 的 25% 后 ， 剩下 的 实心球 连 箱 重 9.5 千克 ， 问 箱子 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "601", "content": "榕 欣 小学校 园里 有 一块 边长 9 米 的 正方形 试验田 ， 平均 每平方米 收 土豆 1.5 千克 ， 这块 试验田 共 收 土豆 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14643", "content": "鱼缸 内 有 5 尾 金鱼 ， 其中 黒 尾 鱼 有 3 尾 ． 则 黒 尾 鱼 占 这些 金鱼 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22957", "content": "某 厂 3 月份 计划 生产 24000 个 零件 ， 实际 生产 了 25200 个 零件 ， 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22951", "content": "比 387 少 96 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1205", "content": "家具店 运 来 45 把 木椅 ， 运 来 的 折椅 比 木椅 的 3 倍 还 多 10 把 ， 家具店 共运 来 多少 把 折椅 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18798", "content": "(15/2) 与 多少 的 (3/2) 倍 相等 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14361", "content": "学校 原来 栽 了 月季花 240 棵 ， 再 栽 16 棵 就是 所 栽 丁香 棵 数 的 2 倍 ． 学校 栽 了 丁香 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3600", "content": "天海 游泳场 第一天 卖出 游泳 票 554 张 ， 第 二 天 上午 卖出 287 张 ， 下午 卖出 313 张 ， 这 两天 一共 卖出 多少 张 票 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3920", "content": "有 浓度 为 8% 的 糖水 600 克 ， 现在 要 把 它 稀释 成 浓度 为 6% 的 糖水 ， 需要 加水 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4120", "content": "甲 数 的 (5/8) 是 10 ， 它 的 25% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18584", "content": "一 块 正方形 的 铁皮 ， 它 的 边长 是 (5/2) 米 ， 做 一只 长方体 的 铁桶 用 去 (3/4) 平方米 ， 还 剩 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20230", "content": "甲乙 两辆 汽车 同时 从 相距 135 公里 的 两地 相对 开出 ， 甲 汽车 每 小时 行 48 千米 ， 乙 汽车 每 小时 行 42 于 米 ． 相遇 时 乙 汽车 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9056", "content": "明明 买 了 6 本 练习本 ， 兰兰 买 了 3 本 同样 的 练习本 ， 明明 比 兰兰 多 花 1.35 元 ． 每 本 练习本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10870", "content": "19.98 * 37 - 199.8 * 1.9 + 1.998 * 820 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "19385", "content": "880 / 80 的 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22429", "content": "栽 一种 树苗 ， 成活率 最低 是 50% ， 最高 是 80% ， 如果 想 保证 种 活 2400 棵 树 ， 最少 种树 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21638", "content": "动物园 虎山 上 的 老虎 每天 要 吃 85 千克 牛肉 ， 整个 5 月 （ 31 天 ） 饲养 老虎 要 用 去 多少 牛肉 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6722", "content": "两辆 汽车 运货 ， 甲 运 (7/8) 吨 ， 比 乙 多 运 (1/5) 吨 ， 两车 一共 运 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6481", "content": "一 位 老红军 准备 拿出 9900 元 救助 失学 儿童 ， 他 首先 拿出 了 900 元 救助 了 2 名 失学 儿童 ， 照 这样 计算 ， 余下 的 钱 还 可以 救助 多少 名 失学 儿童 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17247", "content": "576 + 128 与 11 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6958", "content": "学校 买来 230 盒 粉笔 ， 每星期 用 12 盒 ， 用 了 6 个 星期 ， 还 剩 多少 盒 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20960", "content": "2008 年 北京奥运 纪念邮票 每套 16 枚 ， 售价 是 32 元 ． 今天 售出 17 套 ， 一共 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8424", "content": "一 个 水池 已经 灌满 了 (5/8) 池 的 水 ， 还要 灌 多少 水 才 满 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12155", "content": "两个 加数 的 和 比 其中 的 一个 加数 多 142 ， 比 另 一个 加数 多 283 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9761", "content": "四年级 一班 有 30 位 学生 ． 单元 测验 时 ， 有 10 人 得 100 分 ， 有 5 人 得 99 分 ， 有 7 人 得 97 分 ， 有 6 人 得 96 分 ， 有 2 人 得 100 分 ， 平均 每人 得 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.9, "length": 21}
-{"question_id": "16515", "content": "同学 们 做 黄花 20 朵 ， 正好 是 红 花朵 数 的 5 倍 ， 做 红花 多少 朵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6949", "content": "纺织厂 要 生产 一批 布 ， 每 台 机器 每 小时 织 28 米 ， 5 台 机器 8 个 小时 才 织 完 ， 这 批 布 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15745", "content": "一 个数 的 倒数 是 (4/7) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19063", "content": "科学 课时 ， 陈老师 布置 了 “ 观察 绿豆 的 发芽 过程 ” 的 实验 作业 ． 冬冬 的 实验 中 有 60 颗 豆芽 发芽 了 ， 没 发芽 的 占 原来 绿豆 的 (1/6) ， 原来 绿豆 有 多少 颗 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11196", "content": "体育 用品商店 降价 20% 以后 出售 一种 排球 ， 售价 是 每个 28 元 ． 这种 排球 原来 售价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "747", "content": "一 辆 汽车 在 高速公路 上 行驶 的 速度 是 每 小时 90 千米 ， 是 在 普通 公路 上 行驶 速度 的 2 倍 ． 这辆 汽车 在 普通 公路 上 行驶 的 速度 是 每 小时 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4791", "content": "47 - 2184 / 56 的 商 ， 所得 的 差 去 乘 12 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10024", "content": "修 一条 公路 ， 已经 修 了 全长 的 (5/8) ， 还 剩 36 千米 没 修 ， 这 条 公路 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17513", "content": "工程队 修 一条 长 840 米 的 公路 ， 平均 每天 修 60 米 ， 要 修 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18243", "content": "车队 向 灾区 运送 救援 物资 ， 去 时 每 小时 行 65 千米 ， 8.4 小时 到达 目的地 ． 返回 时 ， 如果 每 小时 行 70 千米 ， 多长时间 能 返回 出发 地点 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1604", "content": "制作 一个 底面 直径 为 30 厘米 ， 长 60 厘米 的 圆柱形 通风管 ， 至少 要 用 多少 平方厘米 的 铁皮 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1398", "content": "学校 新 购进 65 套 桌椅 ， 每张 课桌 136 元 ， 每 把 椅子 74 元 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10112", "content": "甲 、 乙 两 人 合 做 一件 工作 ， 合 做 一段时间 后 ， 甲 做 了 这件 工作 的 (5/9) ， 乙 做 了 这件 工作 的 (1/3) ． 甲 、 乙 两 人 一共 做 了 这件 工作 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15633", "content": "爸爸 用 两条 长度 都 是 1.38 米 的 绳子 接 起来 捆扎 报纸 ． 接口处 共用 去 绳子 0.3 米 ， 接 好 后 的 绳子 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4307", "content": "一 种 电脑 现在 比 原价 降低 (2/15) ， 正好 降低 800 元 ， 这种 电脑 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20749", "content": "一 个 饲养场 ， 养鸡 2400 只 ， 养鸭 的 只 数 是 鸡 的 (5/6) ． 养 的 鸡 和 鸭 一共 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3425", "content": "育苗 小学 有 女生 360 人 ， 比 男生 少 (1/5) ， 这 间 小学 有 学生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3710", "content": "百货商场 搞 促销 ， 满 5000 元 打 0.8 ． 张老师 要 买 一套 音响 5600 元 ， 王老师 要 买 一台 录音机 800 元 、 现在 他们 打算 合 起来 买 ， 这样 比 单独 买 可 节省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8992", "content": "小强 做 一本 习题集 ， 原 计划 30 天 完成 ． 按计划 学习 8 天 后 ， 他 每天 比 原 计划 多 做 6 题 ， 结果 提前 4 天 完 了 全部 习题 ， 这 本书 共有 多少 道 习题 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4695", "content": "2008 年 小 明 9 岁 了 ， 他 的 出生 年份 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3706", "content": "修路 队 修 一条 公路 ， 第一天 修 了 这 条 公路 的 (2/5) ， 第 二 天 修 了 余下 的 (1/3) ， 已知 这 两天 共 修路 120 米 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13335", "content": "两个 数 相除 ， 除数 是 32 ， 商 是 14 ， 余数 是 8 ， 那么 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22221", "content": "58 个 香蕉 ， 每 篮装 6 个 ， 拿掉 多少 个 ， 就 可以 正好 装 9 个 篮子 了 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3464", "content": "课外 小组 女同学 原来 占 全组 人数 的 (1/3) ， 加入 4 个 女同学 后 ， 女同学 就 占 全组 原有 人数 的 (1/2) ， 那么 课外 小组 原来 的 人数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5989", "content": "甲 数 的 17 倍 是 850 ， 甲 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14099", "content": "一 堆 煤 ， 第一次 运走 了 它 的 (2/5) ， 第一次 运走 了 它 的 (1/4) ， 还 剩 140 吨 ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11654", "content": "李老师 在 银行 里 存 了 4000 元 钱 ， 存期 3 年 ， 年利率 2.7% ， 到期 取款 时 ， 他 实际 得到 利息 多少 元 ？ （ 利息税 20% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4042", "content": "一 个数 的 40% 是 48 的 (5/6) ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6256", "content": "卡车 从 南京 出发 ， 沿 高速公路 开往 杭州 ． 如果 每 小时 行 90 千米 ， 已经 行 了 2 小时 ， 此时 距 终点 还有 20 千米 ， 南京 到 杭州 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13354", "content": "一 根 钢管 ， 截去 它 的 40% ， 还 剩下 2.4 米 ， 如果 要 剩下 这根 钢管 的 45% ， 要 截去 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5995", "content": "甲乙 两站 相距 768 千米 ， 一列 火车 每 小时 行 46 千米 ， 另 一列 火车 每 小时 行 50 千米 ， 两车 同时 从 甲乙 两站 相对 开出 ， 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2280", "content": "一 块 棉花 地 去年 收 皮棉 110 吨 ， 今年 比 去年 增产 了 10% ． 这块 棉花 地 今年 皮棉 产量 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6663", "content": "光明 小学 五年级 有 学生 160 人 ， 占 全校学生 人数 的 (1/8) ， 全校 少先队员 是 全校 人数 的 80% ， 少先队员 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9077", "content": "一 个 排球 定价 60 元 ， 篮球 的 价格 是 排球 的 (5/6) ． 篮球 的 价格 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2134", "content": "一 个 打字员 打 一份 稿件 ， 第一天 打 了 30 页 ， 第 二 天 打 了 50 页 ， 还 剩下 总 页数 的 (3/7) 没有 打 ， 这份 稿件 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12620", "content": "实验 小学 有 学生 3600 人 ， 其中 男生 占 52% ， 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15600", "content": "一 瓶 (5/2) 升 的 饮料 ， 先 倒 满 4 大 杯 ， 每杯 (2/5) 升 ， 再 把 剩下 的 平均 倒 进 6 个 小杯 里 ． 每个 小杯 倒 进 多少 升 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22459", "content": "一 个数 的 (3/4) 等于 (5/6) 的 (3/2) 倍 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18703", "content": "明明 看 一本 350 页 的 书 ， 已经 看 了 全书 的 (3/5) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9352", "content": "一 根 绳子 长 (3/4) 米 ， 如果 用 去 (1/3) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1390", "content": "甲 数 是 104 ， 乙 数 是 甲 数 的 3 倍 ， 甲 、 乙 两 数 的 和 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8611", "content": "一 个数 的 (2/5) 正好 是 50 的 (2/3) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6424", "content": "学校 有 20 个 足球 ， 足球 比 篮球 少 (1/5) ， 篮球 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10568", "content": "甲 、 乙 两站 相距 335 千米 ， 一辆 货车 和 一辆 客车 同时 从 两站 相对 开出 ， 2.5 小时 后 两车 还 相距 85 千米 ， 客车 每 小时 行 58 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14504", "content": "3 年 一班 有 学生 55 人 ， 参加 学校 绘画 比赛 的 有 20 人 ， 既 参加 绘画 比赛 又 参加 书法 比赛 的 有 12 人 ， 两项 比赛 都 没 参加 的 有 14 人 ， 参加 书法 比赛 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8856", "content": "一 个数 的 (2/5) 是 36 ， 那么 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4463", "content": "一 个 篮球 58 元 ， 一个 足球 45 元 ， 李老师 买 了 4 个 篮球 和 6 个 足球 ， 一共 付出 600 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7097", "content": "今年 ， 上海 世博会 的 主题 是 “ 城市 让 生活 更 美好 ” ． 目前 ， 我国 13 亿 人口 中 城市 人口 约 占 (2/5) ， 一般 发达国家 这 一 比例 约 为 (7/10) ． 要 达到 一般 发达国家 的 水平 ， 我国 城市 人口 还要 增加 多少 亿 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2568", "content": "有 一次 数学 练习 ， 共有 25 题 ， 每 做 对 一 题 得 4 分 ， 错 一 题 或 不 做 一 题 扣 1 分 ， 小 琴 得 了 75 分 ， 则 她 做 对 的 题 数 = 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7378", "content": "一 列 火车 长 400 米 ， 以 每分钟 800 米 的 速度 通过 一座 长 2800 米 的 隧道 ， 全 车 通过 要 用 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2756", "content": "玩具厂 用 2.6 米 布 可 做 布娃娃 5 个 ， 改进 工艺 后 ， 每个 布娃娃 可以 节约 0.02 米 布 ． 现在 每个 布娃娃 需要 用布 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17417", "content": "公园 里 有 月季花 90 棵 ， 正好 是 郁金香 的 (3/4) ， 兰花 的 棵 数 是 郁金香 的 (5/6) ， 兰花 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19611", "content": "水果 店里 有 苹果 200 千克 ， 比 运 来 的 雪梨 多 (4/5) ， 运 来 雪梨 多少 千克 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20120", "content": "在 一次 口 算 比赛 中 ， 小林 用 1.5 分钟 完成 了 全部 试题 ， 平均 每分钟 做 24 题 ， 又 过 了 0.5 分钟 ， 小 军 也 完成 了 全部 试题 ． 小 军 平均 每分钟 做 多少 道 题 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22593", "content": "一 根 电线 ， 第一次 用 去 全长 的 37.5% ， 第 二 次 用 去 27 米 ， 这时 已 用 的 电线 与 没用 的 电线 的 长度 比 是 3 ： 2 ． 这根 电线 原来 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19701", "content": "甲 、 乙 两辆 汽车 同时 从 相距 250 千米 的 两地 相对 开出 ， 2.5 小时 后 相遇 ， 甲 车 每 小时 行 52 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15095", "content": "四年级 有 104 个 同学 去 郊游 ， 每位 同学 需 车票 、 门票 共 39 元 ， 算 一下 应该 准备 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1924", "content": "小 红 爸爸 上 月工资 中 应 纳税 所得额 是 420 元 ， 如果 按 5% 的 税率 缴纳 个人所得税 ， 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11369", "content": "修 一条 长 500 米 的 水渠 ， 已经 修 了 4 天 ， 每天 修 120 米 ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18190", "content": "(1/6) + (3/4) * (2/3) / 2 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1982", "content": "有 甲 、 乙 两辆 汽车 同时 从朝阳 开往 相距 468 千米 的 锦州 ， 已知 甲 车 每 小时 行 80 千米 ， 当 乙 车 到达 锦州 时 ， 甲 车 距离 锦州 还有 52 千米 ． 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5226", "content": "一 件 衣服 ， 打 0.9 后 便宜 了 40 元 ， 这件 衣服 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20944", "content": "把 5 根 短绳 结成 一根 长绳 ， 一共 要 打 多少 个 结 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4983", "content": "在 408 / 8 中 ， 被除数 增加 多少 ， 商 就 增加 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18206", "content": "妈妈 参加 了 0.8 再 打 0.9 的 活动 ， 买 了 一件 标价 495 元 的 连衣裙 ， 妈妈 付 了 400 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12708", "content": "甲 港 到 乙 港 的 航程 有 210 千米 ， 一艘 轮船 运货 从 甲 港 到 乙 港 ， 用 了 6 小时 ， 返回 时 每 小时 比 去 时 多行 7 千米 ， 返回 时 用 了 几小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2716", "content": "21 * 32 与 88 的 积 ， 所得 的 积 再 减去 9136 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8974", "content": "一 桶 纯净水 18 升 ， 正好 够 小 华 家 4 口 人 喝 3 天 ． 平均 每人每天 喝 多少 升水 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23024", "content": "李 英 读 一 本书 ， 第一天 读 了 全书 的 (1/3) ， 第 二 天 读 的 比 全书 的 25% 还 多 18 页 ， 这时 读 了 的 页数 和 没 读 的 比 是 3 ： 1 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4959", "content": "张 大伯 上 菜场 买 了 两只 老母鸡 ， 每 只 鸡 重 4 千克 ， 鸡 的 价格 是 每千克 15 元 ． 小朋友 ， 请 你 帮 张 大伯 算 一 算 ， 他 今天 买 鸡 共用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11418", "content": "妈妈 把 一块 长 1 米 的 布 分成 3 块 ． 第一块 长 (3/6) 米 ， 第 二 块长 (1/6) 米 ， 剩下 的 那 块长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5039", "content": "水果店 运 来 一批 红富士 苹果 ， 每箱 15 千克 ， 卖出 12 箱 后 ， 还 剩 150 千克 ． 水果店 运进 红富士 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22971", "content": "《 新编 童话集 》 共 4 本 ， 售价 26.8 元 ， 平均 每 本 售价 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6369", "content": "张 英 、 李强 、 肖 红 参加 跳高 比赛 ， 张 英 跳 的 高度 是 1.1 米 ， 李强 比 张 英 跳 得 高 0.15 米 ， 肖 红 比 李强 跳 得 低 0.09 米 ， 肖 红 跳 过 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20157", "content": "李师傅 加工 一批 零件 ， 计划 每天 加工 36 件 ， 12 天 完成 ， 实际 每天 加工 54 件 ． 实际 多少 天 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8924", "content": "养猪厂 去年 养猪 480 头 ， 今年 比 去年 多 养 15% ， 今年 比 去年 多 养猪 多少 头 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15841", "content": "修路 队 修 一条 1560 米 公路 ， 它 修 了 15 天 ， 还 剩下 360 米 没 修 完 ． 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2827", "content": "回收 1 千克 废纸 ， 可 生产 0.8 千克 再生纸 ， 如果 每人 回收 3.5 千克 废纸 ， 200 人 回收 的 废纸 可以 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4404", "content": "小 明 读 一 本书 ， 第一次 读 了 总数 的 (2/5) ， 第 二 次 读 了 余下 的 (1/3) ， 这 是 书 还 剩 24 页 ． 两次 共 读 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6916", "content": "服装 加工厂 要 做 980 套 衣服 ， 已经 做 了 320 套 ． 如果 剩下 的 衣服 要 6 天 做 完 ， 平均 每天 要 做 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7433", "content": "林 老师 每分钟 跳绳 197 下 ， 3 分钟 跳绳 多少 下 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12141", "content": "一 种 面粉 的 出粉率 是 80% ， 要 得到 320 千克 面粉 ， 需要 多少 千克 小麦 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5304", "content": "欣 宇 喜欢 测量 创新 ， 她 将 两臂 张开 ， 请 杨 兰 帮 她 量 一下 ， 约 是 1.6 米 ． 她 双臂 打开 俯身 测量 一个 圆形 花坛 的 周长 ， 刚好 20 次 量完 ， 这个 圆形 花坛 的 周长 约 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18687", "content": "六年级 有 女生 110 人 ， 占 全年 级 人数 的 55% ， 六年级 的 人数 比 五年级 多 (1/19) ， 五年级 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14489", "content": "一 堆 货物 第一次 运走 它 的 (1/4) ， 第 二 次 运走 全部 货物 的 (2/5) ， 还 剩下 21 吨 ， 这 堆 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7870", "content": "一 块 长方体 石料 ， 长 4 分 米 ， 宽 3.5 分 米 ， 厚 2 分 米 ， 如果 每 立方分米 石料 重 4.5 千克 ， 这块 石料 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "21967", "content": "一 个 棱 长 为 9 分 米 的 正方体 ， 它 的 体积 = 多少 立方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18979", "content": "某班 学生 的 近视 率 是 28% ， 不 近视 人数 比 近视 人数 多 22 人 ． 这个 班 共有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22793", "content": "小 明 看 一本 故事书 ， 第一天 看 了 它 的 (2/13) ， 第 二 天 看 了 它 的 (5/13) ． 还 剩 几分 之 几 没 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19331", "content": "张 兰 和 李 明 家 都 住 在 学校 的 正 东面 ， 中午 放学 后 他们 同时 从 校门口 向 家里 走 去 ， 张 兰 每分钟 走 65 米 ， 李 明 每 分 走 75 米 ， 10 分钟 后 两 人 同时 到 家 ， 他们 两家 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7437", "content": "某大学 有 男生 4000 人 ， 女生 人数 是 男生 的 (3/5) ． 这个 大学 一共 有 多少 个 学生 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1658", "content": "一 桶 油 用 去 了 7 千克 ， 用 去 的 是 剩下 的 25% ， 剩下 的 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15990", "content": "内乡 到 宝天曼 的 旅游车 ， 在 平原 行驶 的 速度 是 60 千米 / 时 ， 在 山区 行驶 的 速度 是 25 千米 / 时 ， 该车 在 平原 行驶 了 4 小时 ， 在 山区 行驶 了 1 小时 ， 最后 到达 宝天曼 宾馆 ， 这 段 路程 大约 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13413", "content": "已知 大圆 半径 比 小 圆 半径 长 (1/4) ， 如果 小 圆 的 周长 是 21.98 cm ， 求 大圆 的 周长 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4678", "content": "一 架飞机 4 小时 飞行 2700 千米 ， 照 这样 计算 ， 从 甲 城 到 乙 城 共 飞行 2.5 小时 ， 甲乙 两城 的 航线 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8937", "content": "一 个 运输队 要 运 粮食 331.63 吨 ， 第一天 运 76.63 吨 ， 剩下 的 2 天运 完 ， 平均 每天 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12132", "content": "某 服装店 老板 ， 为了 提高 销售额 ， 先 将 所有 商品 提价 30% ， 而后 宣传 说 ： “ 为了 资金 回收 ， 所有 商品 0.8 优惠 ， 数量 有限 ， 欲购从速 ． ” 请 你 算 一 算 ， 一件 没有 提价 前 标价 360 元 的 服装 ， 现在 售价 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1708", "content": "商店 运 来 1125 千克 苹果 ， 卖 了 15 筐 ， 还 剩 180 千克 ， 每 筐 苹果 重量 相等 ， 每 筐 苹果 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6015", "content": "6 一 前夕 ， 少先队 大队 部 把 为 幼儿园 做 玩具 的 任务 按 5 ： 3 分给 五年级 和 四年级 ， 五年级 实际 做 了 108 件 ， 超过 分配任务 的 20% ． 四年级 原 计划 做 玩具 多少 件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5531", "content": "5 条 小船 可以 坐 25 人 ， 照 这样 计算 ， 如果 小船 的 数量 增加 3 倍 ， 可以 坐 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9260", "content": "为 绿化 城市 ， 某 街道 栽种 一批 树苗 ， 这 批 树苗 的 成活率 是 75% ～ 80% ， 如果 要 栽 活 3200 棵 树苗 ， 至少 要 栽种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1066", "content": "运 一批 煤 ， 第一次 运走 这 批 煤 的 (3/10) ， 第 二 次 运走 31 t ， 还 剩下 5.4 t ， 这 批 煤 共 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8410", "content": "商场 开展 冬季 促销 活动 ， 所有 商品 一律 按 0.75 销售 ． 一个 篮球 的 标价 是 80 元 ， 实际 出售 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14832", "content": "两地 相距 15 千米 ， 甲乙 二 人 从 两地 同时 出发 相向 而 行 ， 经过 (4/3) 小时 在 途中 相遇 ， 已知 甲 每 小时 行 6 千米 ， 乙 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22197", "content": "玩具厂 计划 生产 电动玩具 900 个 ， 原 计划 6 天 完成 ， 实际 提前 2 天 完成 ， 实际 每天 比 计划 每天 多 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5830", "content": "某班 有 30 人 参加 长跑 和 乒乓 比赛 ． 其中 参加 乒乓 比赛 的 有 16 人 ， 参加 长跑 的 有 23 人 ， 两种 比赛 都 参加 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15022", "content": "1.84 / 0.9 ， 商 是 2.04 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9852", "content": "639 / 25 与 16 的 差 ， 商 上 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4222", "content": "有 甲 、 乙 两 人 ． 甲 每分钟 走 80 米 ， 乙 每分钟 走 72 米 ， 两 人 同时 从 a 地 到 b 地 出发 ， 乙 比 甲 多用 4 分钟 ． a 、 b 两地 相距 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5641", "content": "博雅 商场 卖出 5 箱 伊利 婴儿 奶粉 ， 每箱 20 包 ， 一共 卖 1700 元 ， 每包 奶粉 的 价钱 = 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19835", "content": "一 个 书店 购进 文艺 书 90 本 ， 购进 的 故事书 比 文艺 书 多 (1/6) ， 购进 故事书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17678", "content": "水果 批发市场 运 来 苹果 3.5 吨 ， 运 来 的 梨 比 苹果 的 2 倍 多 0.1 吨 ， 运 来 的 梨 有 多少 吨 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10411", "content": "3.86 - 0.875 - 1.125 = ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14092", "content": "5000 元 存入 银行 3 年 ， 如果 年利率 为 3.24% ， 利息税 为 5% ， 到期 后 能 取回 本息 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "5876", "content": "一 件 风衣 原来 售价 为 140 元 ， 现在 降低 了 (3/10) ， 这件 风衣 降低 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22755", "content": "四年级 同学 去 景 屏山 公园区 游览 ． 一班 去 了 33 个 学生 ， 二 班 去 了 35 个 学生 ， 3 班 去 了 32 个 学生 ， 还 去 了 6 位 教师 ． 学生 门票 6 元 ， 成人 门票 12 元 ， 买 门票 共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "15951", "content": "为 绿化 城市 ， 某 街道 栽 一批 树苗 ， 树苗 的 成活率 是 75% 到 80% ， 如果 要 栽 活 1200 棵 ， 至少 要 在 栽种 多少 棵 树苗 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5530", "content": "同学 们 为 希望 小学 捐款 ， 六年级 共 捐款 860 元 ， 比 五年级 同学 多 捐款 110 元 ， 五年级 同学 的 捐款 数 相当于 全校 捐款 总数 的 (15/67) ， 全校 一共 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13821", "content": "三年级 共有 学生 476 人 ， 平均 分成 4 批 参观 恐龙 馆 ， 每批 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14024", "content": "红星村 去年 总共 有 60 户 种 油菜 ， 平均 每户 产 油菜籽 105 千克 ． 油菜籽 的 出油率 是 42% ， 这个 村 去年 生产 的 油菜籽 一共 可以 炸 油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13950", "content": "将 一 直径 6 米 的 圆形 花坛 向 周围 扩宽 2 米 ， 花坛 的 面积 比 原来 增加 了 多少 平方米 ？", "knowledge": ["*", "+", "-", "/", "^"], "difficulty": 0.7, "length": 17}
-{"question_id": "16336", "content": "新华书店 的 一种 新书 有 600 本 ， 上午 卖出 192 本 ， 下午 卖出 249 本 ， 还 剩下 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14887", "content": "一 辆 客车 从 甲 城 开往 乙 城 ， 每 小时 行驶 80 千米 ， 用 了 5 小时 ， 返回 时 少 用 了 1 小时 ， 这辆 客车 返回 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18304", "content": "下面 是 某 校办工厂 提供 的 一组 信息 ： （ 1 ） 要 完成 4450 套 教具 的 制作 任务 ； （ 2 ） 每天 计划 做 300 套 ； （ 3 ） 实际 每天 比 计划 多 做 75 套 ； （ 4 ） 计划 15 天 做 完 ； （ 5 ） 这个 校办工厂 效益 好 ， 产品质量 高 ． 请 你 根据 以上 信息 解答 ： 完成 任务 要 用 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "724", "content": "学校 田径队 有 男生 24 人 ， 是 女生 人数 的 (3/2) ， 田径队 共有 多少 名 运动员 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1397", "content": "一 本 故事书 7 元 ， 一本 科技 书 12 元 ， 小 东 故事书 和 科技 书 各 买 了 3 本 ， 他 一共 付 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1850", "content": "小 明 和 小 军 在 旱冰场 溜冰 ， 2 人 3.5 小时 付费 35 元 ， 平均 每人 每 小时 付费 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15875", "content": "三年级 种树 178 棵 ， 四年级 比 三年级 种树 的 3 倍 还 多 16 棵 ． 四年级 种树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11742", "content": "甲乙 两地 相距 600 千米 ， 客车 和 货车 分别 从 两地 同时 相向 开出 ， 2.5 小时 后 ， 两车 还 相距 400 千米 ， 照 这样 计算 ， 两车 再行 多少 小时 才能 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21067", "content": "在 一条 长 120 米 的 水渠 的 一边 植树 ， 每隔 3 米 植 1 棵 ， 两头 都 植 ， 共 可 植 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2367", "content": "一 辆 汽车 从 东城 开往 西城 ， 每 小时 行 45 千米 ， 6 小时 到达 西城 ， 从 西城 返回 东城 只用 了 5 小时 ， 比 从 东城 开往 西城 平均 每 小时 多行 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18258", "content": "多少 的 78% 是 218.4 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4196", "content": "水果店 运 来 一车 水果 ， 第一天 卖出 15% ， 第 二 天 卖出 35% ， 两天 共 卖出 200 千克 ， 这 车 水果 共有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20962", "content": "一 本 600 页 的 故事书 ， 小 明 看 了 4 天 还 剩 340 页 ， 他 平均 每天 看 多少 页 书 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11878", "content": "一 条 绳子 长 15 米 ， 剪 去 (1/3) ， 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15002", "content": "小 红 家 在 一块 底 为 4 米 、 高 为 2.5 米 的 平行四边形 空地 上 种 满 了 鲜花 ， 如果 每平方米 土地 上 的 鲜花 卖 300 元 ， 这块 平行四边形 空地 上 的 鲜花 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16084", "content": "希望 小学 三年级 有 男 学生 218 人 ， 女 学生 比 男 学生 少 20 人 ． 希望 小学 三年级 有 学生 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22687", "content": "一 种 品牌 电视机 ， 现在 售价 2000 元 ， 比 原价 降低 了 500 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7988", "content": "水 结成 冰 后 体积 增加 10% ， 现有 一块 冰 的 体积 是 33 立方厘米 ， 融化 成 水 后 体积 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2626", "content": "一 袋 大米 吃 了 45 千克 ， 正好 是 这 袋 大米 的 (5/8) ， 这 袋 大米 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15290", "content": "一 桶 油 2 千克 ， 第一次 倒 出 油 的 (7/8) ， 第 二 次 倒 出 (1/5) 千克 ， 桶 内 还 剩 油 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18120", "content": "甲 船 从 a 港 出发 ， 每 小时 行 18 千米 ， 4 小时 后 ， 乙 船 出发 10 小时 追 上 甲 船 ， 求 乙 船 的 速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15296", "content": "服装厂 计划 制作 一批 服装 ， 第一天 完成 了 (3/8) ， 第 二 天 完成 了 余下 的 (9/20) ， 还 剩下 55 套 没有 完成 ． 原 计划 加工 服装 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10724", "content": "某人 上个月 将 20000 元 人民币 一次性 存入 银行 ， 定期 2 年 ， 年利率 是 4.40% ， 到期 时 他 可以 得到 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2289", "content": "小强 家 距离 南宁 有 260 千米 ， 他 坐 的 汽车 平均 每 小时 行驶 65 千米 ， 他 到 南宁 要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15028", "content": "计算 9999 + 999 + 99 + 9 + 8 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "9127", "content": "学校 图书室 运 来 新书 25 包 ， 每包 20 本 ， 每 本 2.36 元 ， 买 这 批 书 共 花费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7993", "content": "修路 队 修路 ， 平均 每天 修 145 米 ， 已经 修 了 42 天 ， 还 剩 470 米 未 修好 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9416", "content": "a ． b 两城 之间 相距 180 千米 ， 一艘 客轮 在 静 水中 的 速度 是 25 千米 / 时 ， 从 a 到 b 是 顺水 航行 ， 水速 为 5 千米 / 时 ， 求 轮船 往返 于 两地 之间 共 需 多长时间 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14783", "content": "某 筑路 队 修筑 一条 公路 ， 每天 修 的 比 全路 的 (1/60) 还 多 0.4 千米 ， 修 了 50 天 正好 修 完 ． 这 条 公路 长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14813", "content": "东城 小学 为 山区 学校 捐 图书 ， 一年级 捐 了 1325 本 ， 二年级 有 3 个 班 ， 每班 捐 427 本 ． 两个 年级 共 捐书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20977", "content": "一 只 梅花鹿 高 2 米 ， 是 一只 长颈鹿 高 的 (1/3) ， 这 只 长颈鹿 高 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7915", "content": "某 洗衣机 厂 去年 上半年 生产 洗衣机 32 万台 ， 是 下半年 产量 的 (8/9) ． 这个 洗衣机 厂 去年 全年 的 产量 = 多少 万台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2620", "content": "一 段 钢材 长 (4/5) 米 ， 重 (1/25) 吨 ， 这种 钢材 每 米 重 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6489", "content": "把 10 米 长 的 电线 平均 剪成 5 段 ， 每 段长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12746", "content": "在 一个 减法 算式 中 ， 差 与 减数 的 比 是 3 ： 5 ， 减数 是 被减数 的 多少 % ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16599", "content": "实验 小学 组织 学生 观看 电影 ， 上午 去 了 3 批 学生 ， 每批 150 人 ， 下午 又 去 了 430 人 ， 这 一天 共有 多少 学生 观看 电影 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12772", "content": "某 工地 的 一项 工程 ， 原 计划 由 30 人 工作 ， 每天 工作 8 小时 ， 45 天 完工 ， 为了 提前 完工 ， 实际 由 54 人 工作 ， 每天 工作 10 小时 ， 可以 提前 几天 完工 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2984", "content": "有 36 米 布 ， 正好 能 做 8 套 儿童 衣服 和 10 套 大人 衣服 ， 每套 大人 衣服 用布 2.4 米 ， 每套 儿童 衣服 用布 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19571", "content": "1.7 / 0.5 商 是 3 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17316", "content": "一 排 小朋友 一共 13 人 ， 排 在 强强 前面 的 有 3 人 ， 排 在 强强 后面 的 有 几 人 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7644", "content": "李老师 在 2006 年 把 15000 元 存入 银行 ， 定期 3 年 ． 如果 年利率 是 2.7% ， 应 缴 20% 的 利息税 ， 到期 后 他 得 本金 和 税后 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "17282", "content": "西营 村 今年 香 梨 大丰收 ， 年产量 6 万吨 ， 是 去年 的 (3/2) ． 去年 这个 村 香 梨 产量 = 多少 万吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7861", "content": "在 一条 路 的 一边 每隔 40 米 有 一棵树 ， 首尾 都 栽 共有 121 棵 树 ． 在 同样 长 的 公路 上 准备 栽 51 棵 树 ， 每 相邻 两棵树 的 距离 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "675", "content": "仓库 有 一批 货物 ， 第一次 调出 480 件 ， 第 二 次 调出 余下 的 37.5% ， 这时 剩下 的 件数 与 调出 的 件数 比 是 5 ： 7 ， 这 批 货物 共有 多少 件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15891", "content": "把 8 枝 红铅 笑 和 2 枝 蓝 铅笔 放在 一包 里 ， 让 你 每次 任意 摸 出 一枝 ， 这样 摸 10000 次 ， 摸 出 红 铅笔 的 次数 大约 占 总 次数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3763", "content": "肖 玲 看 一本 290 页 的 小说 ， 前 4 天 每天 看 20 页 ． 以后 每天 看 30 页 ， 再 用 几天 可以 看 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10800", "content": "有 一个 西瓜 ， 被 平均 分成 了 6 份 ， 小 明 吃 了 其中 的 (2/6) ， 小 丽 比 小 明 多 吃 了 整个 西瓜 的 (1/6) ， 两 人 一共 吃 了 这个 西瓜 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20172", "content": "一 根 磁棒 的 直径 是 lcm ， 用 漆 包 钱 在 这根 磁棒 上 缠绕 60 圈 ， 至少 需要 漆 包 钱 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6448", "content": "□ / 7 = 4 … △ 中 ， 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14501", "content": "1000 只 鸽子 飞 进 50 只 鸽笼 ， 无论 怎么 飞 ， 一定 能 找到 一只 鸽子 最 多 的 笼子 ． 它 里面 至少 有 多少 个 鸽子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17118", "content": "今天 春天 ， 同学 们 参加 植树 活动 ， 共 植 松树 3 行 ， 每行 8 棵 ； 杨树 5 行 ， 每行 15 棵 ． 松树 和 杨树 共 植 了 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11652", "content": "小熊 商店 运进 3 箱 方便面 ， 每箱 24 包 ． 卖出 19 包 后 ， 还 剩 多少 包 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7332", "content": "包装 600 个 乒乓球 ， 每 12 个 装 一盒 ， 每 10 盒装 一箱 ， 一共 装 了 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9911", "content": "黑天鹅 有 27 只 ， 白天鹅 的 只 数 是 黑天鹅 的 3 倍 少 5 只 ． 白天鹅 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1551", "content": "养牛场 计划 5 天 割草 3000 千克 ， 实际 每天 比 原 计划 多 割 150 千克 ， 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6582", "content": "甲乙 两 人 同时 从 两地 沿 一条 公路 走来 ， 甲 每分钟 走 60 米 ， 乙 每分钟 走 50 米 ， 经过 3 分钟 两 人 相遇 ， 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20778", "content": "一 本书 原价 35 元 ， 现在 打 0.8 出售 ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11452", "content": "红领巾 小学 三年级 有 男生 257 人 ， 女生 235 人 ， 已经 体检 身体 的 有 387 人 ， 没有 体检 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21039", "content": "一 匹 马 的 时速 约 为 62 千米 ， 一只 猎豹 的 速度 是 马 的 1.4 倍 ， 猎豹 的 时速 约 为 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21249", "content": "小 东 的 邮票 张 数 比 小 红 的 少 (1/5) ， 那么 小 红 的 邮票 张 数 比 小 东 的 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14438", "content": "一 种 小汽车 的 最快 速度 是 每 小时 行 140 千米 ． 相当于 一种 超音速 飞机 速度 的 (1/15) ． 这种 超音速 飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20931", "content": "一 个数 除以 5 ， 商 是 24 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "334", "content": "251 - 182 的 差 乘 162 + 38 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21337", "content": "小强 赢 了 11 颗 玻璃球 后 ， 正好 比 他 原来 的 玻璃球 多 (1/10) ， 小强 现在 有 多少 颗 玻璃球 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15985", "content": "0.7 / 0.15 ， 商 是 4 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4528", "content": "小 玲 看 一本 故事书 ， 第一天 看 了 72 页 ， 第 二 天 看 的 是 第一天 的 2 倍 ， 小 玲 这 两天 一共 看 了 多少 页 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1019", "content": "7 位 同学 照 合影 ， 按规定 定价 12.5 元 洗 4 张 照片 ， 由于 他们 每个 人 要 一张 照片 ， 共用 了 17 元 ． 加洗 一张 照片 需要 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1901", "content": "学校 数学 学科 竞赛 共有 20 道 题目 ， 评分标准 是 做 对 一 题 得 5 分 ， 做 错 或 没有 做 ， 一 题 倒扣 2 分 ． 李 亮 得 了 79 分 ， 他 做 对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14667", "content": "某 商场 某月 下半月 营业额 是 500 万元 ， 比 上 半月 减少 了 (1/5) ， 上 半月 的 营业额 = 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21721", "content": "果园 里 有 荔枝树 458 棵 ， 龙眼树 比 荔枝树 多 69 棵 ， 龙眼树 有 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13215", "content": "长江 号 货轮 从 甲 港 开往 乙 港 ， 已经 行 了 180 千米 ， 正好 航行 了 甲 、 乙 两 港 航道 的 (3/5) ， 还要 行 多少 千米 才能 到达 目的地 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22870", "content": "一 台 织布机 原来 每 小时 织布 59.2 米 ， 改进 技术 后 ， 现在 每 台 每 小时 织布 米 数 是 原来 的 2.5 倍 ， 现在 每 台 每 小时 织布 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15733", "content": "一 块 三角形 道路交通 警示 标志牌 面积 是 35.1 dm ^ 2 ， 底 是 9 dm ， 它 的 高 = 多少 dm ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3796", "content": "一 捆 彩带 长 60 米 ， 用 去 了 (2/5) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "622", "content": "□ / 5 = ○ … △ 中 ， 余数 △ 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21173", "content": "一 根 电线 长 6 米 ， 第一次 用 去 它 的 (1/2) ， 第 二 次 用 去 (1/3) 米 ， 两次 共用 去 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2728", "content": "一 本书 有 150 页 ， 小 红 第一天 看 了 (2/5) ， 第 二 天 应从 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13523", "content": "用 一批 布 做 服装 ， 每套 服装 用布 3.6 米 ， 可以 做 120 套 ． 如果 每套 服装 节约 用布 0.4 米 ， 这 批 布 可以 做 多少 套 服装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11428", "content": "仓库 里 有 一批 面粉 ， 运出 总数 的 62.5% 后 ， 又 运进 270 袋 ， 这时 仓库 里 的 面粉 恰好 是 原有 面粉 的 (6/7) ． 仓库 里 原有 面粉 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11457", "content": "一 件 原价 120 元 的 上衣 打 0.85 出售 ， 要 比 原价 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10952", "content": "一 个 学习 小组 有 3 名 男同学 ， 4 名 女同学 ， 现在 要 选出 小组长 2 人 ． 如果 每人 被 选 的 机会 是 一样 的 ， 那么 选出 的 小组长 是 一男一女 的 有 多少 种 可能 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6969", "content": "小 红 家 买 了 一袋 大米 ， 吃 了 (2/5) ， 还 剩 15 千克 ． 买来 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10739", "content": "延寿 中心小学 为 四川 抗震救灾 捐款 1234 元 ， 一年级 捐 了 136 元 ， 二年级 捐 了 235 元 ， 剩下 的 是 其它 几个 年级 捐 的 ， 其余 几个 年级 捐 了 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21495", "content": "李 丽 拿 7.2 元 钱 买 文具 ， 买 了 4 支 铅笔 ， 每 只 0.75 元 ． 剩下 的 钱 买 图画纸 ， 每张 0.6 元 ， 买 了 多少 张 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5582", "content": "3 （ 4 ） 班 有 42 人 ， 其中 有 20 人 参加 了 篮球 兴趣小组 ， 有 24 人 参加 了 美术 兴趣小组 ， 有 14 人 两个 小组 都 参加 了 ． 这 两种 兴趣小组 都 没有 参加 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6528", "content": "一 根 铁丝 ， 用 去 它 的 (3/4) 是 12 米 ， 如果 用 去 它 的 (3/8) ， 那么 还 剩 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12989", "content": "附加 题 ： 小 莉 看 一本 童话 书 ， 第一周 读 了 (1/4) ， 第 二 周 又 读 了 余下 的 (2/5) ， 小 莉 共 读 了 全书 的 几分 之 几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "293", "content": "小强 把 100 元 存入 银行 ， 定期 2 年 ， 年利率 4.68% ， 到期 时 ， 应得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11720", "content": "一 只 青蛙 每天 吃 害虫 80 只 ， 一只 燕子 比 青蛙 的 (3/4) 少 20 只 ， 一只 燕子 每天 吃 害虫 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11172", "content": "妈妈 买 了 45 只 苹果 ， 9 只 生 梨 ， 苹果 的 只 数 是 生 梨 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4560", "content": "一 只 狗 重 17 千克 ， 山羊 的 体重 比 小狗 的 3 倍 还 多 5 千克 ． 山羊 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2166", "content": "2060 - 34 / 3604 的 商 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11186", "content": "道 班 工人 要 维修 一条 长 900 米 的 公路 ， 前 5 天 修 了 225 米 ， 照 这样 的 速度 ， 还要 多少 天 才能 修 完 这 条 公路 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2512", "content": "一 辆 汽车 从 甲地 到 乙地 ， 去 时 每 小时 行 45 千米 ， 8 小时 到达 ． 回来 时 6 小时 可以 到达 ， 回来 时 每 小时 比 去 时 多行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21752", "content": "一 个人 用 8 元 钱 买 了 一只 鸡 ， 9 元 钱 卖掉 了 ， 然后 他 觉得 不划算 ， 有用 10 元 钱 买回来 了 ， 再 以 11 元 钱 卖 给 另外 一个 人 ． 这 只 鸡 他 赚 了 多少 元 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15218", "content": "美 华 公司 的 3 台 编织机 8 小时 编织 了 240 米 彩 绳 ， 平均 每 台 编织机 每 小时 可以 编织 多少 米 彩 绳 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11104", "content": "一 桶 汽油 倒 出 (3/8) ， 还 剩下 40 千克 ， 这 桶 汽油 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16697", "content": "六年级 参加 “ 庆 国庆 ” 大合唱 的 学生 有 56 人 ， 占 六年级 总 人数 的 40% ， 六年级 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20314", "content": "板桥 小学 新 进 一批 桌椅 ． 买 40 把 椅子 花 1520 元 ， 7 张 桌子 花 735 元 ． 照 这样 计算 ， 买 一套 桌椅 要 用 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22428", "content": "红球 的 个数 是 黑 球 的 4 倍 ， 将 它们 放入 一个 袋子 里 ， 每次 随意 摸 一个 球 ， 摸 若干次 后 ， 摸 到 红球 的 次数 约 是 总 次数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16667", "content": "从 甲地 到 乙地 有 2 条 不同 的 路 可 走 ， 从 乙地 到 丙 地 有 3 条 不同 的 路 可 走 ， 从 丙 地 到 丁 地 有 4 条 不同 的 路 可 走 ， 现在 从 甲地 到 丁 地 共有 多少 条 不同 的 路线 可 走 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14646", "content": "砌 一个 圆柱形 的 沼气池 ， 底面 直径 是 3 米 ， 深 2 米 ， 这个 沼气池 可以 容纳 多少 立方米 的 沼气 ． （ π 取 3.14 ）", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "17838", "content": "计算 ： 2011.327 * 2010.328 - 2011.328 * 2010.327 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7010", "content": "保护环境 ， 四年级 收集 废品 73.5 千克 ， 五年级 收集 的 是 四年级 的 1.2 倍 ， 两个 年级 一共 收集 了 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20587", "content": "一 个 等腰三角 形 底边 长 5 厘米 ， 腰 长 4 厘米 ， 这个 三角形 的 周长 = 多少 厘米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18866", "content": "一 件 毛衣 现价 100 元 ， 比 原价 降低 了 20% ， 原价 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6034", "content": "甲 、 乙 二 人 练习 跑步 ， 甲 每秒 跑 7.5 米 ， 乙 每秒 7 米 ， 现在 乙 先 跑 10 秒 ， 几秒 后 甲 追 上 乙 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21751", "content": "一 个 圆柱 沿 底面 直径 切开 ， 横截面 面积 是 17 平方厘米 ， 圆柱 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7031", "content": "商店 运进 260 包 白糖 和 红糖 ， 卖掉 白糖 的 (1/12) 后 剩下 的 白糖 比 红糖 少 7 包 ， 运进 白糖 多少 包 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "728", "content": "413 * 22 的 积 减去 87 与 125 的 和 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12409", "content": "汪洋 读 一本 故事书 ， 第一天 读 了 总 页数 的 (1/5) ， 第 二 天 比 第一天 少 读 了 15 页 ， 两天 正好 读 了 总 页数 的 (1/3) ． 两天 一共 读 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5285", "content": "一 辆 压路机 的 滚筒 是 圆柱形 ， 滚筒 的 长 2 米 ， 底面 直径 1.5 米 ， 它 滚动 一周 压路 面积 = 多少 立方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21769", "content": "乐乐 从 家里 出发 去 公园 玩 ， 平均 每分钟 走 60 米 ， 8 分钟 后 还 剩 全程 的 (1/3) ． 从 乐乐 家 到 公园 有 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3310", "content": "一 根 绳子 长 (5/6) 米 ， 用 去 了 (1/5) 米 ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18871", "content": "在 一道 除法 算式 里 ， 商 是 3 ， 除数 是 9 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "574", "content": "绿荫 小学 305 名 师生 乘 5 辆车 区 郊游 ， 如果 每辆车 乘坐 的 师生 同样 多 ， 每辆车 应该 坐 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6856", "content": "一 根 木头 ， 锯 成 4 段 要 12 分钟 ， 照 这样 计算 ， 如果 把 这根 木头 锯 成 8 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2405", "content": "甲 、 乙 两 人 骑车 同时 分别 从 a 、 b 两地 相对 出发 ， 甲 每 小时 行 16 千米 ， 乙 每 小时 行 14 千米 ， 两 人 在 距 中 点 2 千米 处 相遇 ， 则 a 、 b 两地 的 距离 = 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13989", "content": "两 城市 相距 1440 千米 ， 甲 、 乙 两 客车 分别 从 两 城市 同时 相对 开出 ， 经过 8 小时 相遇 ． 已知 甲 车 每 小时 行驶 42 千米 ， 求 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6745", "content": "六年级 有 126 名 同学 参加 学雷锋 活动 ， 其中 (1/3) 的 同学 到 车站 打扫卫生 ， 余下 的 (3/4) 的 同学 到 敬老院 服务 ， 到 敬老院 服务 的 同学 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19739", "content": "在 学校 举行 的 秋季 运动会 开幕式 上 ， 六年级 有 两个 方阵 通过 主席台 ， 其中 男生 有 96 人 ， 女生 人数 比 男生 多 (1/8) ， 六年级 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4710", "content": "王平 的 房间 有 42 平方米 ， 比 李 东 的 房间 大 75% ， 李 东 的 房间 = 多少 平方米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6076", "content": "梨树 比 桃树 多 60 棵 ， 桃树 是 梨树 的 40% ． 梨树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18509", "content": "一 根 木材 ， 锯 成 5 段 用 了 8 分钟 ． 照 这样 计算 ， 把 另外 一根 同样 粗 的 木材 锯 成 12 段 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14854", "content": "大象 每天 吃 的 食物 是 熊猫 的 多少倍 ？ 大象 每天 吃 180 千克 ， 食物 熊猫 2 天 吃 72 千克 食物 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19271", "content": "六年级 一共 有 125 个 学生 ， 每个 学生 收集 1.6 千克 废纸 ． 现在 已知 每千克 废纸 可 生产 0.8 千克 再生纸 ， 那么 六年级 学生 收集 的 废纸 一共 可以 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15656", "content": "小 玲 参加 数学 竞赛 ， 全卷 总 题 数 是 18 题 ， 小 玲 只 做 对 总 题 数 的 (4/9) ． 小 玲 做 错 了 多少 题 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20121", "content": "一 个 平行四边形 的 底 是 25 cm ， 高 是 4 cm ， 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "75", "content": "一 块 6 公顷 的 菜地 需 施肥 (24/33) 吨 ， 平均 每 公顷 施肥 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10994", "content": "一 段 马路上 每 一边 都 有 108 棵 树 （ 马路 的 两端 各 有 一棵树 ） ， 每 相邻 两棵树 之间 的 距离 都 是 15 米 ， 你 知道 这 段 马路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15514", "content": "李 庄 今年 油菜 的 种植 面积 是 28 公顷 ， 比 去年 增加 (1/6) ． 去年 油菜 的 种植 面积 = 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11893", "content": "在 体育 夏令营 中 ， 女 营 员 有 116 人 ， 男 营 员 的 人数 比 女 营 员 的 2 倍 少 56 人 ， 男 营 员 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7237", "content": "少先队员 种树 ， 种 柳树 240 棵 ， 比 杨树 多种 了 60 棵 ， 种 的 杨树 是 柳树 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22935", "content": "一 瓶 1.5 升 的 果汁 ， 正好 可以 倒 6 杯 ， 每杯 果汁 有 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2443", "content": "玩具厂 计划 做 720 只 玩具 熊 ， 已经 做 了 8 天 ， 平均 每天 做 26 只 ， 剩下 的 要 16 天 做 完 ， 平均 每天 要 做 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10779", "content": "跑得快 的 马 每天 行 240 里 ， 跑得慢 的 马 每天 行 150 里 ， 慢 马 先行 12 天 ， 快 马 几天 可 追 上 慢 马 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8283", "content": "一 根 电线 长 1000 米 ， 先 用 去 196 米 ， 又 用 去 204 米 ， 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6911", "content": "甲 数 是 30 ， 乙 数 比 甲 数多 3 倍 ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5196", "content": "小 明 今年 的 年龄 是 爸爸 的 (1/4) ， 爸爸 今年 36 岁 ， 小 明 今年 几岁 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21208", "content": "一 部手机 的 售价 是 1800 元 ， 这 部手机 售出 后 可 获 20% 的 利润 ， 这 部手机 的 进货价 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1375", "content": "一 个数 的 3 倍 + 6 ， 再 减去 9 ， 最后 乘 上 2 ， 结果 是 60 ， 这个 数 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2452", "content": "一 桶 油 ， 用 去 10 千克 ， 剩下 的 比 用 去 的 多 (4/5) ， 这 桶 油 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1136", "content": "14 只 小猪 背 木头 ， 每 只 小猪 背 了 1 根 木头 后 ， 还 剩下 6 根 木头 ， 请问 一共 有 多少 根 木头 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4335", "content": "某 汽车厂 去年 上半年 生产 的 汽车 完成 了 全年 计划 的 45% ， 下半年 生产 1560 辆 汽车 ， 结果 去年 比 原 计划 超产 10% ， 去年 该厂 原 计划 生产 多少 辆 汽车 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19165", "content": "鲜草 晒干 后 相当于 原来 鲜草 的 (8/25) ； 要 晒干 400 千克 ， 需要 鲜草 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "405", "content": "菜场 运 来 白菜 840 千克 ， 运 来 萝卜 是 白菜 的 (5/8) ， 运 来 西红柿 是 萝卜 的 (1/5) ， 运 来 西红柿 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17629", "content": "蓝鲸 每 小时 可以 游 60 千米 ， 比 海豚 的 速度 还 慢 (1/7) ． 海豚 每 小时 可以 游 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17796", "content": "仓库 里 有 10 吨 钢材 ． 第一次 用 去 总数 的 (1/5) ， 第 二 次 用 去 (3/4) 吨 ． 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14352", "content": "把 3 个 白 球 和 7 个 红球 放在 一个 盒子 里 ， 让 你 每次 从中 任意 摸 出 1 个 球 ， 然后 放 回 ． 照 这样 摸 20 次 ， 摸 出 红球 的 次数 大约 占 总 次数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21688", "content": "张 明 体重 30 千克 ， 李 东 的 体重 是 张 明 的 (5/6) ， 李 东 的 体重 是 王 辉 的 (5/7) ． 王 辉 体重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2564", "content": "聪聪 的 房间 面积 是 12 平方米 ， 他 的 房间 只 放 了 一张 长 1.9 米 、 宽 1.4 米 的 床 ． 他 的 房间 还有 多少 平方米 的 空地 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2826", "content": "汽车 要 运 1500 吨 煤 ， 已经 运 了 8 天 ， 还 剩 总数 的 (1/3) ， 照 这样 计算 ， 运 完 共 需 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8601", "content": "甲乙 二 人 同时 从 a 地 到 b 地 ， 当 甲 行 全程 的 (3/4) 时 ， 乙 行 全程 的 (2/3) ． 照 这样 计算 ， 甲 到达 终点 时 ， 乙 行 全程 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18388", "content": "爸爸 的 体重 是 60 千克 ， 我 的 体重 是 爸爸 的 (2/3) ， 比 妹妹 重 10 千克 ． 妹妹 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4137", "content": "比 4.92 多 1.07 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14841", "content": "算式 ： 34 * 36 + 102 * 98 的 计算结果 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5319", "content": "赵 飞 家 养鸡 的 只 数 是 鹅 的 6 倍 ， 鸭 比 鹅 多 7 只 ， 鸭 有 13 只 ． 鸡 有 多少 只 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13761", "content": "小 平 在 踢毽 比赛 中共 踢 了 48 下 ， 小 云 踢 的 数量 是 小 平 的 (3/4) ， 他俩 一共 踢 了 多少 下 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5524", "content": "南京 到 上海 有 280 千米 ， 一辆 汽车 从 南京 出发 4 小时 后 离 上海 还有 20 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20032", "content": "某 乡 修 一条 水渠 ， 第一期 工程 修 了 全长 的 50% ， 第 二 期 工程 修 了 全长 的 35% ， 还 剩 180 米 没有 修 ， 这 条 环山 水渠 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3723", "content": "2008.8 * 2008.5 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20329", "content": "一 颗 人造地球 卫星 绕 地球 转 4 周 ， 需要 11.2 时 ， 照 此 计算 ， 这 颗卫星 绕 地球 转 100 周 ， 要 花 多少 时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12382", "content": "旅游团 共有 36 名 男 游客 和 32 名 女 游客 ， 男 游客 住 3 人 房间 ， 女 游客 住 2 人 房间 ， 一共 需要 住 几个 房间 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18203", "content": "(5/6) 的 多少 是 (7/12) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11678", "content": "一 根 木料 锯 成 4 段 用 12 分钟 ， 另 一根 锯 成 8 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5170", "content": "小 松鼠 摘 了 159 颗 松果 ， 松鼠 妈妈 摘 了 258 颗 松果 ． 小 松鼠 和 松鼠 妈妈 一共 摘 了 多少 颗 松果 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15853", "content": "(2/3) / （ (1/3) - (1/6) ） = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7716", "content": "计算 ： 3687 - 222 - 363 - 478 - 687 - 1637 = ．", "knowledge": ["-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14115", "content": "食堂 购进 4.5 吨 大米 ． 第一天 吃 去 了 (1/3) ， 第 二 天 吃 去 了 (4/5) 吨 ， 俩 天 总共 吃 去 了 多少 吨 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8602", "content": "一 本书 有 60 页 ， 小 芳 看 了 45 页 ， 剩下 的 页数 占 总 页数 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18624", "content": "某人 沿着 铁路 边 的 便 道 步行 ， 一列 客车 从 身后 开来 ， 在 身旁 通过 的 时间 是 15 秒 ， 客车 长 105 米 ， 每秒 速度 为 8 米 ， 求 步行 人 每秒 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16046", "content": "一 艘 船 每 小时 行 12.5 千米 ， 42 小时 到达 目的地 ， 如果 每 小时 行 15 千米 ， 可以 提前 几小时 到达 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17487", "content": "学校 准备 发 练习本 ， 发给 15 个 班 ， 每班 148 本 ， 还 需要 留 50 本 作为 备用 ． 学校 应 买 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14633", "content": "淘气 的 爸爸 在 美国 工作 ， 最近 寄 回家 720 美元 ， 妈妈 要 到 银行 兑换 人民币 ， 能 换 多少 元 人民币 ． （ 1 美元 兑换 人民币 7.2 元 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16063", "content": "客车 和 货车 同时 从 a 地 ， b 地 相对 开出 ， 客车 每 小时 行 60 千米 ， 货车 每 小时 行 全程 的 (1/10) ， 当 货车 行 到 全程 的 (13/24) 时 ， 客车 已 行 全程 的 (5/8) ． a ， b 两地 间 的 路程 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10344", "content": "同学 们 采集 树种 ， 甲组 采 了 (5/8) 千克 ， 比 乙组 多 采 了 (1/6) 千克 ． 甲 、 乙 两组 一共 采 了 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8640", "content": "光明 小学 去年 有 学生 1600 人 ， 今年 比 去年 减少 2.5% ． 今年 有 学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11153", "content": "小 明 去 买 汽水 ， 售货员 说 ： “ 每 3 个 空瓶 可 换 1 瓶 汽水 ， 小 明 买 了 10 瓶 汽水 ， 一共 可 换 多少 瓶 汽水 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6747", "content": "小 明 每 小时 走 5 千米 ， 1.5 小时 可以 走 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19716", "content": "果园 里 有 苹果树 210 棵 ， 比 桃树 多 (1/6) ， 桃树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15620", "content": "某 学校 扩建 操场 ， 计划 投资 80 万元 ． 实际 投资 比 计划 节省 了 5% ． 这个 学校 扩建 操场 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11118", "content": "一 种 国产 冰箱 原来 每 台 售价 2700 元 ， 现在 比 原来 降低 了 (1/10) ， 现在 每 台 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10172", "content": "希望 小学 今年 毕业 的 学生 人数 比 去年 毕业 的 多 10% ， 今年 毕业生 人数 比 去年 多 了 20 人 ， 去年 有 多少 名 毕业生 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22649", "content": "若 甲 数 是 乙 数 的 (4/5) ， 则 乙 数 比 甲 数多 的 多少 （ 用 百分数 表示 ） ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4778", "content": "某校 为 希望 小学 捐款 ， 四年级 65 人 的 捐款 数 是 一年级 的 3 倍 ， 一年级 一共 捐款 260 元 ， 四年级 平均 每人 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23089", "content": "一 只 东北虎 重 360 千克 ， 是 一只 鸵鸟 的 4 倍 ， 鸵鸟 比 东北虎 轻 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12114", "content": "红旗 商场 进 了 一批 玩具 ， 6 月 1 日 这天 以 定价 的 0.8 出售 ， 当天 售出 的 玩具 仍 可 获得 10% 的 利润 ， 问 这 批 玩具 以 定价 出售 时 的 利润 为 百分之几 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5674", "content": "花生仁 的 出油率 是 38% ， 榨 7600 千克 油 需要 花生仁 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8053", "content": "运动队 有 男 运动员 23 人 ， 女 运动员 比 男 运动员 的 2 倍 少 4 人 ． 女 运动员 多少 人 ？ 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16925", "content": "18 个 鸡蛋 装 成 一 纸袋 ， 4 袋装 一盒 ， 5 盒装 成 一箱 ， 一箱 有 多少 个 鸡蛋 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5904", "content": "5 （ 5 ） 班 有 男生 25 人 ， 女生 13 人 ， 女生 人数 是 男生 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5932", "content": "甲 、 乙 两列 火车 从 相距 1070 千米 的 两地 同时 相对 开出 ， 甲 车 每 小时 行 90 千米 ， 5 小时 后 两车 还要 共 行 160 千米 才能 相遇 ． 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10618", "content": "超市 运回 3 车 苹果汁 ， 每 车 8 箱 ， 每箱 装 12 瓶 ． 一共 运回 了 多少 瓶 苹果汁 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5139", "content": "图书馆 有 故事书 180 本 ， 图画书 比 故事书 少 18 本 ， 故事书 、 图画书 共有 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15963", "content": "学校 购进 文艺 书 和 科技 书 共 1000 本 ， 购进 的 文艺 书 是 科技 书 的 4 倍 ， 购进 科技 书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14743", "content": "张老师 有 人民币 126 元 ， 如果 张老师 借给 李老师 26 元 ， 那么 两个 老师 的 钱 数 正好 相等 ． 李老师 原来 有 人民币 多少 元 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10614", "content": "商店 运 来 127 千克 苹果 ， 运 来 的 梨 比 苹果 多 25% ， 运 来 梨 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3296", "content": "自来水 公司 铺设 一条 长 2100 米 的 供水管 道 ， 前 3 天 铺 了 全长 的 15% ． 照 这样 计算 ， 铺 完 管道 一共 要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1931", "content": ". 有 一种 洗衣 液 ， 需要 在 10 升 水中 加入 16 毫升 洗衣 液 效果 更好 ． 一台 洗衣机 的 容量 是 100 升 ， 请问 ： 倒入 多少 毫升 洗衣 液 效果 才能 达到 最好 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7719", "content": "小 王 从 李 村 到 县城 ， 已经 走 了 全程 的 (2/3) ， 再 走 2 千米 就 到达 县城 ． 李 村 到 县城 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17865", "content": "一 种 电视机 ， 现在 售价 1856 元 ， 比 原价 降价 了 144 元 ， 降价 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13802", "content": "一 条 裤子 75 元 ， 是 一件 上衣 价格 的 (2/3) ． 一件 上衣 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17511", "content": "某 洗衣机 厂 去年 上半年 生产 洗衣机 30 万台 ， 是 下半年 产量 的 (5/6) ． 这个 洗衣机 厂 去年 全年 的 产量 = 多少 万台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5122", "content": "小 青 和 爸爸 的 体重 之 和 是 125 千克 ， 小 青 的 体重 是 爸爸 的 (9/16) ， 小 青 有 多重 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14517", "content": "小 芳 看 一本 故事书 共 413 页 ， 平均 每天 看 26 页 ， 看 了 14 天 ， 还 剩 几页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19031", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 40 千米 ， 需 6 小时 到达 ． 如果 要 4 小时 到达 ， 每 小时 要 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10293", "content": "18 除 一个 数 ， 商 是 15 ， 余数 是 12 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8331", "content": "5 辆 卡车 3 次 运走 石子 82.5 吨 ， 每辆 卡车 一次 运走 石子 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22434", "content": "学校 买来 2500 张 白纸 ， 3 月份 用 去 435 张 ， 4 月份 用 去 565 张 ， 还 剩下 多少 张 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19491", "content": "甲乙 两台 挖掘机 合作 挖 一条 水渠 ， 甲 挖掘机 挖 这 条 水渠 的 (7/12) ． 甲 挖掘机 因 故障 未 完成 计划数 ， 乙 挖掘机 多 挖 了 44 米 才 完成 ． 这时 甲乙 两台 挖 的 长度 比 是 2 ： 3 ， 请问 这 条 水渠 有 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4264", "content": "老王 花 1260 元 买 了 一台 洗衣机 ， 比 促销 前 便宜 了 240 元 ． 便宜 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19198", "content": "小 华 有 故事书 6 本 ， 连环画 的 是 故事书 的 8 倍 ． 小 华 有 多少 本 连环画 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18950", "content": "王 红 练习 写毛笔字 ， 计划 每天 写 25 个 ， 24 天 写 完 ， 实际 每天 写 了 30 个 ， 实际 用 了 多少 天 写 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10956", "content": "某 商场 上个月 的 营业额 为 300 万元 ， 由于 受 金融风暴 的 影响 ， 这个 月 的 营业额 下降 了 5% ， 这个 月 的 营业额 为 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7152", "content": "龟 兔 进行 10000 米 赛跑 ， 兔子 速度 是 乌龟 的 5 倍 ， 当 它们 从 起点 出发 后 ， 乌龟 不断 地 跑 ， 兔子 跑 到 某 一 地点 开始 睡觉 ， 兔子 醒来时 ， 乌龟 已经 领先 它 5000 米 ， 兔子 奋起直追 ， 但 乌龟 到达 终点 时 ， 兔子 仍 落后 100 米 ， 那么 在 兔子 睡觉 期间 ， 乌龟 跑 了 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5744", "content": "甲 、 乙 两车 分别 从 a 、 b 两地 同时 相向 而 行 ， 8 小时 相遇 ， 相遇 后 继续 行驶 ， 3 小时 后 两车 相距 360 千米 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14338", "content": "一 位 数学家 问 一位 赶着 70 头 家畜 来 牧场 的 人 ： “ 你 现在 赶来 的 这 群 家畜 占 你 所 拥有 的 全部 家畜 的 多少 ？ ” 牧人 回答 ： “ 我 赶来 的 家畜 是 全部 家畜 的 (1/3) 的 (2/3) ， ” 牧 人家 共有 多少 头 家畜 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17158", "content": "粮店 运 来 2 吨 面粉 ， 第一天 卖出 (1/5) ， 第 二 天 卖出 (1/2) 吨 ， 两天 一共 卖出 多少 吨 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2876", "content": "12 * 0.75 的 积 比 一个 数 的 2 倍 多 0.9 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4602", "content": "780 里面 有 多少 个 65 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5330", "content": "毕 老师 为 学校 购买 了 8 个 篮球 和 1 个 足球 ， 共 花 去 500 元 ． 已知 足球 的 单价 是 60 元 ， 篮球 的 单价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16603", "content": "小 明 骑 自行车 16 分钟 行 了 3 千米 ， 平均 每分钟 行 几分 之 几千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14430", "content": "学校 的 操场 原来 长 30 米 ， 宽 28 米 ， 后来 进行 改建 ， 操场 的 长 增加 了 10 米 ， 面积 不变 ， 现在 操场 的 宽 = 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2170", "content": "学校 排球 的 个数 是 篮球 的 (3/2) ， 足球 与 排球 的 个数 比 是 (1/3) ， 已知 篮球 有 32 个 ， 足球 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13575", "content": "在 一次 测试 中 ， 张 良 伟 英语 考 了 70 分 ， 刘 仁 杰 的 分数 是 张 良 伟 的 (6/7) ， 刘 涛 的 分数 是 刘 仁 杰 的 (2/3) ， 刘 涛 考 了 多少 分 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "473", "content": "河边 有 柳树 192 棵 ， 与 杨树 的 (3/4) 相等 ， 杨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12874", "content": "运输队 要 运送 1000 袋 化肥 ， 已经 运走 了 271 袋 ， 剩下 的 每次 运 81 袋 ， 还要 运 几次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4202", "content": "一 根 绳子 用 去 (71/9) 米 ， 这时 余下 的 比 用 去 的 多 (4/3) 米 ， 这根 绳子 有 多长 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18119", "content": "甲 数 是 103 ， 比 乙 数 的 3 倍 多 7 ， 乙 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "548", "content": "一 个数 的 (3/4) 是 27 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17368", "content": "红星 队 要 收割 85 公顷 的 小麦 ， 已经 收割 了 3 天 ， 平均 每天 收割 (74/3) 公顷 ， 再 收割 多少 公顷 就 能 完成 任务 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11374", "content": "2008 年 北京 奥运会 火炬 共 要 途经 21 个 国家 ， 已经 经过 (5/7) ， 已经 经过 了 多少 个 国家 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17445", "content": "制造 一批 玩具 ， 计划 每天 生产 25 件 ， 28 天 完成 ， 实际 每天 生产 35 件 ， 实际 几天 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13296", "content": "小 玉 家 的 冰箱 里 有 10 瓶 牛奶 ， 她 每天 回家 都 要 喝完 3 瓶 ， 而 送 奶 工 每天 会 送来 2 瓶 牛奶 ． 小 玉 家 多少 天 后 才能 把 冰箱 中 的 牛奶 喝完 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14650", "content": "4 台 拖拉机 3 小时 耕地 7.2 公顷 ， 平均 每 台 拖拉机 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17092", "content": "从 甲地 到 乙地 小 亮 骑 自行车 用 了 24 分钟 ， 乘 汽车 只用 了 6 分钟 ． 自行车 每分钟 行驶 260 米 ， 汽车 每分钟 行驶 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14276", "content": "被减数 比 差 多 136 ， 比 减数 多 265 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11409", "content": "一 个 工地 用 4 辆 汽车 运 渣土 ， 每辆 汽车 每天 可 运 60 吨 ， 为了 加快 工程进度 ， 增加 了 6 辆 同样 的 汽车 ， 现在 每天 可 运 渣土 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17382", "content": "甲 、 乙 两 人 骑 自行车 从 环行 公路 上 同一 地点 同时 出发 ， 背向 而 行 ． 现在 已知 甲 每分钟 行 800 米 ， 行 一圈 的 时间 是 70 分钟 ， 如果 在 出发 后 40 分钟 甲 、 乙 二 人 相遇 ， 那么 乙 每分钟 行 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13303", "content": "有 一块 棱 长 是 80 厘米 的 正方体 的 铁块 ， 现在 要 把 它 溶 铸成 一个 横截面 积 是 20 平方厘米 的 长方体 ， 这个 长方体 的 长 = 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13883", "content": "某 玩具厂 十 月份 生产 儿童玩具 4200 件 ， 比 原 计划 多 生产 了 (1/5) ， 原 计划 生产 玩具 多少 件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14684", "content": "一 本书 共有 300 页 ， 小 军 看 了 这 本书 的 (7/30) ， 那么 还 剩 多少 页 没 看 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16907", "content": "王 蒙 期中考试 数学 成绩 是 96 分 ， 张 明 的 成绩 比 王 蒙 低 (1/8) ， 李 丹 的 成绩 是 王 蒙 和 张 明 总分 的 (1/2) ． 李 丹 得 多少 分 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8077", "content": "5 吨 增加 (1/5) 吨 = 多少 吨 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6563", "content": "6 （ 1 ） 班 有 男生 18 人 ， 占 女生 人数 的 (3/4) ， 全班 共有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2649", "content": "小 敏 家 上 月 交 电费 30 元 ， 这个 月 电费 比 上个月 多 交 了 (2/3) ， 她家 这个 月 交 电费 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7873", "content": "在 一个 比例 中 ， 两个 内 项 互为 倒数 ， 其中 一个 外 项 是 1.2 ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2471", "content": "某种 饮料 ， 原来 每盒 装 0.65 升 ， 换成 新 的 包装 后 ， 每盒 比 原来 少装 0.15 升 ， 原来 装 10 盒 的 量 ， 现在 可以 装 多少 盒 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14393", "content": "计算 ： 89999 + 7999 + 699 + 59 + 9 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "16472", "content": "建筑工地 运 来 一堆 黄沙 ， 用 去 (5/8) 后 ， 剩下 的 比 用 去 的 少 36 吨 ． 这 堆 黄沙 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16853", "content": "科技 活动 小组 有 55 人 ． 在 一次 制作 飞机 模型 和 制作 舰艇 模型 的 定时 科技 活动 比赛 中 ， 老师 到 时 清点 发现 ： 制作 好 一架 飞机 模型 的 同学 有 40 人 ， 制作 好 一艘 舰艇 的 同学 有 32 人 ． 每个 同学 都 至少 完成 了 一项 制作 ． 问 两项 制作 都 完成 的 同学 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6474", "content": "永新 农具厂 生产 一批 农具 ， 原 计划 15 天 完成 ， 实际 每天 生产 280 件 ， 不仅 12 天 完成 了 任务 ， 还 超额 了 360 件 ． 原 计划 每天 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15239", "content": "小 丽 的 妈妈 买 了 3000 元 的 国债券 ， 定期 3 年 ， 如果 年利率 是 6.15% ， 到期 时 ， 能 获 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17424", "content": "水 是 由 氢 和 氧 两种 元素 按 1 ： 8 的 重量 比 组合成 的 ， 9.9 千克 水中 含有 氧 元素 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13029", "content": "一 根 竹竿 长 12 米 ， 截 成 每 段长 2 米 的 小 段 ， 每 截 一次 需要 3 分钟 ， 一共 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "51", "content": "23 * 42 + 26 * 40 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17987", "content": "甲 、 乙 两个 修路 队 合 修 一条 公路 ， 甲 每天 修 3.2 千米 ， 乙 每天 修 4 千米 ， 共用 了 15 天 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1270", "content": "一 幢 7 层楼 ， 每层 楼梯 有 16 级 ， 小 丁 从 1 楼 到 7 楼 ， 共 要 走 多少级 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2187", "content": "一 种 电脑 原价 每 台 4500 元 ， 现在 降价 (1/3) ， 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2427", "content": "某 饲养场 养 了 2400 只 鹅 ， 是 鸭 的 只 数 的 (3/4) ， 饲养场 养 了 多少 只 鸭 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5102", "content": "水果店 运 来 60 箱 水果 ， 卖出 了 44 箱 ， 还 剩下 320 千克 ． 每箱 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20606", "content": "在 “ 5.12 ” 抗震救灾 的 日子 里 ， 武警 陈 叔叔 前 4 天 在 一线 共 奋战 70 小时 ， 后 3 天 平均 每天 在 一线 工作 14 小时 ． 这 一周 陈 叔叔 平均 每天 在 一线 工作 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21238", "content": "一 份 搞 件 ， 已经 打印 好 了 24 页 ， 比 剩下 的 页面 少 20% ， 这份 稿件 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1465", "content": "园林 工人 今年 植树 4320 棵 ， 比 去年 植树 棵 数 的 3 倍 还 多 24 棵 ， 去年 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2103", "content": "天 美 服装厂 计划 生产 2500 套 运动服 ， 前 5 天 平均 每天 做 100 套 ， 余下 的 如果 每天 做 125 套 ， 还 需要 几天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16127", "content": "有 个 周长 80 米 的 正方形 大 池塘 ， 从 正方形 的 顶点 起 每 5 米 栽 一棵 柳树 ， 一共 可 栽 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10320", "content": "某 图书馆 有 科技 书 和 文艺 书 共 630 本 ， 其中 科技 书 占 (1/5) ， 后来 又 买来 一部分 科技 书 ， 这时 科技 书 占 总数 的 (3/10) ． 又 买来 科技 书 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8451", "content": "王 大伯 参加 我 县 农村 合作 医疗保险 ． 条款 规定 ： 农民 住院 医疗费 设 起 付 线 ， 县级 医疗机构 为 400 元 ， 在 起 付 线 以上 的 部分 按 45% 补偿 ． 今年 4 月份 王 大伯 患 了 急性 肠炎 ， 在 定点医院 住院治疗 了 20 天 ， 医疗 费用 共计 8280 元 ， ． 按 条款 规定 ， 王 大伯 只要 自付 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7653", "content": "振兴 粮店 运 来 (5/6) 吨 面粉 ， 第一天 卖 了 总数 的 (1/3) ， 第 二 天 卖 了 总数 的 (2/5) ， 还 剩 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13604", "content": "9 个 298 的 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19564", "content": "365 加上 多少 正好 是 75 的 14 倍 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7642", "content": "算式 “ ◇ / 7 = 9 … ★ ” ， ★ 表示 的 数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17024", "content": "用 分数 表示 2 / 9 的 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10845", "content": "妈妈 买 了 9.5 千克 橘子 ， 付给 水果 商店 30 元 ， 找回 7.2 元 ， 请 你 算 一 算 ， 买来 的 橘子 每千克 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3840", "content": "长江 东路 小学 六年级 的 学生 学习 奥数 课程 ， 第一期 学 了 全部 课程 的 (2/7) ， 第 二 期 学 后 余下 的 (1/3) 还 多 6 讲 ， 最后 还 剩下 14 讲 没 学 ． 他们 一共 要 学 多少 讲 的 奥数 课程 ？ （ 倒推 法 解题 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "763", "content": "甲乙 两地 相距 410 千米 ， 客车 和 货车 分别 从 甲乙 两地 相向 开出 ． 货车 每 小时 行 37 千米 ， 当 货车 行 了 82 千米 以后 ， 客车 才 从 乙地 开出 ， 又 经过 4 小时 相遇 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18496", "content": "两车 同时 从 相距 180 千米 的 两地 相向 而 行 ． 经过 (9/5) 小时 相遇 ． 甲 车 每 小时 行驶 45 千米 ， 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3092", "content": "修路 队 要 修 一条 路 ， 第一天 修 了 全长 的 (1/20) ， 照 这样 又 修 了 4 天 ， 还 剩下 800 米 没 修 完 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13", "content": "甲乙 两列 火车 同时 从 相距 450 千米 的 两地 相对 开出 ， 甲 车 每 小 行 行 45 千米 ， 5 小时 后 两车 还 相距 25 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "661", "content": "小 李 做 计算题 ， 做 了 16 题 ， 只 完成 总任务 的 (1/4) ， 小 李 原有 多少 题 计算题 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3120", "content": "新华书店 运到 一批 图书 ， 第一天 卖出 这 批 图书 的 45% ， 第 二 天 卖出 这 批 图书 的 35% ， 已知 两天 共 卖出 640 本 ， 这 批 图书 共 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3647", "content": "胜利 乡 计划 修 一条 15 千米 的 公路 ， 第一个 月 修 了 全长 的 (2/5) ， 第 二 个 月 修 了 全长 的 30% ， 还 剩 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22643", "content": "王 阿姨 在 玩具厂 做 玩具 ， 上午 做 了 72 个 ， 下午 做 了 48 个 ． 每 8 个 装 一箱 ， 上午 比 下午 多 做 了 几箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20274", "content": "大 剧院 的 楼下 有 1024 个 座位 ， 比 楼上 的 座位 多 328 个 ． 这个 剧院 共有 座位 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7197", "content": "阳光 超市 新 进 205 捆 手套 ， 每 捆 6 副 ， 每 副 8 元 ， 一 共用 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22062", "content": "小 元 参加 800 米 跑步 比赛 ， 每分钟 跑 190 米 ， 已经 跑 了 3 分钟 ， 距 终点 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2768", "content": "128 名 乒乓球 选手 参加 比赛 ， 采用 淘汰制 争夺 冠军 ， 共 应 进行 几场 比赛 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8981", "content": "笑笑 身高 1.4 米 ， 妈妈 的 身高 比 笑笑 的 2 倍 少 1.2 米 ， 妈妈 的 身高 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6724", "content": "《 新华字典 》 每 本 定价 14 元 ， 但是 买 100 本 以上 每 本 就 可以 优惠 2 元 ， 学生 单独 买 150 本 的 钱 ， 学校 统一 买 可以 买 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1734", "content": "在 2004 年 雅典 奥运会 上 中国 健儿 以 32 枚 金牌 荣登 金牌榜 第 二 名 ， 比 2000 年 悉尼奥运会 多 得 4 块 金牌 ， 悉尼奥运会 的 金牌数 是 雅典 奥运会 金牌数 的 多少 （ 填 几分 之 几 ） ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21160", "content": "男生 有 32 人 ， 比 女生 多 (1/7) ， 女生 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11867", "content": "一 饮料店 平均 每天 售出 饮料 350 支 ， 这个 月 （ 按 30 天 计算 ） 共 售出 饮料 多少 支 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8961", "content": "学校 开展 捐书 活动 ， 三年级 捐 了 1025 本 ， 55 本 包 一包 ， 包 了 17 包 ， 还 剩 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9178", "content": "在 含盐 率 为 4% 的 150 克 盐水 中 ， 水 有 多少 克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22384", "content": "某 农村 去年 种 蔬菜 24 公顷 ， 今年 种 蔬菜 的 面积 比 去年 多 (1/8) ． 今年 种 多少 蔬菜 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6325", "content": "一 个 服装厂 原来 生产 一套 服装 的 成本 是 160 元 ， 由于 扩大 生产 规模 ， 现在 每套 服装 的 成本 是 128 元 ， 现在 每套 服装 的 成本 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20478", "content": "明明 过生日 时 请 好 朋友 们 吃饭 ， 买 了 4 瓶 橙汁 ， 每瓶 0.75 升 ， 每杯 可 倒 (3/10) 升 ， 这些 橙汁 可 倒 多少 杯 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3403", "content": "一 个数 的 20% 是 80 ， 它 的 (1/2) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18782", "content": "一 个 工程队 计划 修 公路 180 km ， 已经 修 了 (5/6) ， 还 剩 多少 km 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16110", "content": "星光 加工厂 要 加工 一批 零件 ， 已经 完成 6480 只 ， 是 没有 完成 的 8 倍 ， 这 批 零件 共有 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10116", "content": "一 个 缝纫 工厂 原来 做一套 制服 需 4.8 米 布 ， 采用 新 的 剪裁 方法 以后 ， 每套 节省 0.8 米 布 ， 原来 做 1200 套 制服 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5753", "content": "口袋 里 有 除 颜色 不同 其它 都 相同 的 6 个 红球 、 2 个 白 球 和 4 个 黄 球 ， 从中 任意 摸 出 1 个 球 ， 摸 出 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10780", "content": "美术 小组 有 30 人 ， 比 航模 小组 人数 多 (1/5) ， 航模 小组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21706", "content": "小 明 前 3 天 共 看书 15 页 ， 后 4 天 每天 看 16 页 ， 这 星期 他 共 看书 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3545", "content": "两个 因数 的 积 是 240 ， 若 一个 因数 不变 另 一个 因数 扩大 5 倍 ， 那么 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14806", "content": "同学 们 采集 树种 ， 四年级 采集 了 16 千克 ， 三年级 采集 的 重量 是 四年级 的 (5/6) ， 又 是 六年级 的 (2/3) ， 六年级 采集 树种 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2014", "content": "一 根 绳子 用 去 25% ， 剩下 的 比 用 去 的 多 5 米 ， 则 这根 绳子 还 剩下 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13357", "content": "学校 今年 12 月份 共 用电 900 度 ， 比 原 计划 节约用电 100 度 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2638", "content": "一 幢 6 层楼 ， 每层 之间 有 20 级 楼梯 ， 从 楼下 走 到 5 层 ， 要 走 多少级 楼梯 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14620", "content": "一 列 火车 的 票价 有 两种 3.5 元 一张 的 有 320 个 座位 ， 6 元 一张 的 有 310 个 座位 ， 如果 某次 客满 ， 这 列 客车 这次 的 收入 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7640", "content": "一 根 绳子 ， 剪 去 同样 长 的 5 段 ， 每 段长 124 米 ， 还 剩下 370 米 ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11430", "content": "小 华 上 体育课 排队 时 ， 从左往右 数 他 是 第 10 个 ， 从 右 往 左 数 他 是 第 16 个 ． 小 华 所在 的 队伍 共有 多少 个 同学 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16474", "content": "某市 有 1000 个 外语 教师 懂 英语 或 俄语 ， 其中 懂 英语 的 有 750 人 ， 既 懂 英语 又 懂 俄语 的 有 200 人 ， 那么 懂 俄语 的 教师 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11759", "content": "学校食堂 运 来 一批 煤 ， 原 计划 每天 烧 60 千克 ， 可以 烧 12 天 ； 由于 改进 了 烧煤 的 装置 ， 结果 每天 只 烧 了 45 千克 ， 这 批 煤 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18814", "content": "国庆节 ， 小 红 一家 开车 从 射洪 出发 去 重庆 旅游 ， 一 共用 去 5 小时 ， 前 3 小时 每 小时 行 85 千米 ， 后 2 小时 共 行驶 120 千米 ， 射洪 到 重庆 一共 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13622", "content": "一 本 《 格林童话 》 一共 有 120 个 故事 ， 小 明 每天 读 6 个 故事 ， 他 多少 天 可以 读完 这 本书 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9187", "content": "某 乡镇 去年 工业 和 农业 产值 的 比 是 25 ： 8 ， 去年 工农业 总产值 为 6600 万元 ， 工业产值 = 多少 万元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7396", "content": "一 件 商品 的 标价 是 250 元 ， 打 0.8 出售 ， 则 卖出 价格 为 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6754", "content": "养鸡场 今年 养鸡 1028 只 ， 如果 再 养 172 只 ， 正好 是 去年 养鸡 只 数 的 3 倍 ， 去年 养鸡 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "833", "content": "搬 一批 书 ， 每次 15 本 ， 12 次 搬 一半 ， 余下 的 9 次 搬 完 ， 那么 余下 的 平均 每次 搬 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15325", "content": "新华书店 新近 560 本 故事书 ， 第一天 卖出 了 (1/4) ， 第 二 天 卖出 了 20% ， 还 剩下 多少 本 没有 卖出 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14895", "content": "8 筐 重量 相等 的 苹果 ， 如果 从 每 筐 中 取 走 25 千克 ， 剩下 苹果 的 重量 等于 原来 3 筐 苹果 的 重量 ， 求 每 筐 苹果 重 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "657", "content": "3 米 长 的 绳子 ， 截 成 (1/4) 米 长 的 小 段 ， 可以 截 成 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5300", "content": "以前 一套 衣 150 元 ， 现在 改进 技术 后 成本 降低 了 20% ． 现在 一套 衣 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1749", "content": "百花 胡同 小学 有 480 人 ， 只有 5% 的 学生 没有 参加 意外事故 保险 ． 参加 保险 的 学生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1677", "content": "把 1 米 长 的 钢管 平均 截 成 3 段 ， 每 段长 = 多少 米 ． （ 用 分数 表示 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2571", "content": "果园 里 有 3 种 果树 ， 其中 梨树 棵 数 占 (1/3) ， 苹果树 的 棵 数 与 其他 两种 树 棵 数 的 比 是 1 ： 5 ， 梨树 和 苹果树 共有 180 棵 ， 果园 里 共有 果树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9753", "content": "六二 班 有 男生 40 人 ， 男生 和 女生 人数 的 比 是 10 ： 9 ， 女生 有 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "481", "content": "商店 运 来 一批 电脑 ， 第一天 卖出 20 台 ， 第 二 天 卖出 25 台 ， 共 卖出 总数 的 (5/9) ． 这 批 电脑 共有 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6897", "content": "上海 世博园 首日 接待 游客 36 万 人 ， 比 预计 增加 了 20% ， 预计 首日 接待 游客 多少 万 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22724", "content": "小 明 骑车 每分钟 走 289 米 ， 19 分钟 大约 走 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18067", "content": "客车 和 货车 同时 从 360 千米 的 甲 、 乙 两地 相向 开出 ， 3 小时 后 相遇 ， 客车 每 小时 行 65 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22729", "content": "花园 小学 买 了 35 套 单人 课桌椅 ， 每张 课桌 118 元 ， 每 把 椅子 42 元 ， 一共 要 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3066", "content": "一 个 水果店 运回 一批 苹果 ， 上午 卖出 78.5 千克 ， 下午 卖出 的 是 上午 的 1.4 倍 ， 这 一天 共 卖出 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7297", "content": "故事书 每 本 3.45 元 ， 科普 书 每 本 4.36 元 ， 学校 里 购 来 一批 新书 ， 10 本 《 故事 王 》 和 100 本 《 科普 故事 》 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20176", "content": "学校 体育场 楼下 有 308 座位 ， 楼上 有 8 排 ， 每排 36 个 座位 ， 楼下 比 楼上 多 多少 个 座位 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5048", "content": "四年级 有 学生 120 人 ， 四年级 的 学生 人数 是 五年级 学生 人数 的 (4/5) ， 五年级 学生 人数 相当于 六年级 学生 人数 的 (3/4) ， 六年级 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21581", "content": "翡翠 山 湖 小学 要 去 买 75 套 桌椅 ， 已知 每张 桌子 要 80 元 ， 每 把 椅子 要 58 元 ， 那么 这些 桌椅 要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "38", "content": "某地 平均 年 日照 1200 小时 ， 乙地 年 日照时间 比 它 短 (1/4) ． 乙地 年 日照时间 比 它 短 多少 小时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15447", "content": "在 12 人 中 ， 爱 唱歌 的 有 8 人 ， 爱 打乒乓球 的 有 6 人 ， 既 爱 唱歌 又 爱 打乒乓球 的 有 3 人 ， 那么 不 爱 唱歌 且 不 爱 打乒乓球 的 有 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3823", "content": "学校 买 回 24 个 篮球 ， 买 回 的 篮球 的 个数 是 排球 的 3 倍 ， 买 回 的 足球 比 排球 多 9 个 ， 学校 买 回 多少 个 足球 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10232", "content": "一 条 公路 长 1800 米 ， 从 起点 到 终点 ， 每隔 30 米 安装 一根 电线杆 ， 共 需要 安装 电线杆 多少 根 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3982", "content": "学校 组织 募捐 活动 ， 五年级 捐款 数 比 六年级 少 (1/4) ， 五年级 捐款 1500 元 ． 六年级 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3769", "content": "一 根 长 1.5 米 的 圆柱形 钢材 ， 截 成 相等 的 2 段 后 ， 表面积 增加 1.6 平方分米 ， 这根 钢材 原来 的 体积 = 多少 立方分米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10385", "content": "长风 电扇厂 计划 生产 2800 台 电扇 ． 前 6 天 已经 生产 了 672 台 ， 照 这样 计算 ， 还要 生产 多少 天 才能 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4659", "content": "8 分钟 能 加工 40 个 零件 ， 照 这样 的 速度 ， 加工 一个 零件 需要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17728", "content": "修 一段 铁路 ， 要 用 每 根 12 米 长 的 新 铁轨 换下 原来 每 根 长 9 米 的 旧 铁轨 ． 这 段 铁路 原有 84 根 旧 铁轨 需要 换 多少 根 新 铁轨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21082", "content": "王奶奶 家养 有 公鸡 59 只 ， 母鸡 77 只 ， 小鸡 85 只 ， 王奶奶 家养 的 公鸡 和 母鸡 一共 多少 只 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4339", "content": "8.3 比 一个 数 的 2.5 倍 少 3.7 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13478", "content": "数学 兴趣小组 的 同学 在 一次 考试 中 ， 平均分 是 80 分 ， 其中 (3/4) 的 同学 及格 ， 他们 的 平均 成绩 是 88 分 ， 不及格 同学 的 平均分 = 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18128", "content": "新光 村 1989 年 旱田 与 水田 的 比 是 5 ： 3 ， 去年 将 2800 公亩 旱田 改成 水田 后 ， 旱田 与 水田 的 比 是 1 ： 2 ， 新光 村 共有 水 旱田 多少 公亩 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8060", "content": "一 个 养殖场 ， 养鸭 的 只 数 比 养鸡 的 只 数 少 20% ， 养 的 鸡 比 鸭 多 1000 只 ． 这个 养殖场 养鸭 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18152", "content": "妈妈 买 3 包 奶粉 和 4 袋 洗衣粉 ， 一 共用 去 57.9 元 ， 已知 洗衣粉 每 袋 4.2 元 奶粉 每包 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17956", "content": "有 两 框 苹果 ， a 框 66 千克 ， b 框 72 千克 ， 把 这些 苹果 分给 6 位 职工 ， 每人 可 分 到 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6798", "content": "学校 要 增添 图书 ， 每套 《 儿童 漫画 》 135 元 ， 每套 《 作文 大全 》 18 元 ， 如果 各 买 5 套 ， 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7549", "content": "花生 的 出油率 是 27% ， 20 吨 花生 可以 榨出 多少 吨 花生油 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16877", "content": "小花 今年 9 岁 ， 奶奶 的 年龄 比 她 的 7 倍 多 5 岁 ， 奶奶 今年 多少岁 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5349", "content": "甲乙 两辆 汽车 分别 从 a 、 b 两地 相对 开出 ， 相遇 后 继续 行驶 ． 当 两车 又 相距 96 千米 时 ， 甲 车 行驶 了 全程 的 80% ， 乙 车 行驶 了 全程 的 60% ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12297", "content": "时代 超市 里 一袋 大米 售价 68 元 ， 净重 25 千克 ． 大米 每千克 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1402", "content": "一 套 运动装 ， 上衣 的 价格 是 134 元 ， 裤子 的 价格 是 75 元 ， 学校 准备 为 28 名校 运动 队员 每人 买 一套 这样 的 运动装 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2300", "content": "一 种 电冰箱 ， 原价 是 2400 元 ， 促销价 是 1800 元 ， 便宜 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14703", "content": "两列 火车 ， 一列 长 120 米 ， 每秒 行 20 米 ； 另 一列 长 160 米 ， 每秒 行 15 米 ， 两车 相向 而 行 ， 从 车头 相遇 到 车尾 离开 需要 多少 秒钟 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1513", "content": "计算 ( (5/8) + (1/2) ) / (3/4) 的 结果 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2776", "content": "给 一个 长方形 铁门 的 表面 涂 防锈漆 ， 涂漆 的 面积 是 8 平方米 ， 需要 涂 两次 ， 第一次 每平方米 用 15 克 漆 ， 笫 二 次 每平方米 用 的 漆 是 第一次 的 (3/5) ， 一共 需要 多少 克 防锈漆 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "4909", "content": "车上 原有 乘客 45 人 ， 到 中转站 后 下去 了 10 人 ， 上来 了 12 人 ， 现在 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9785", "content": "一 桶 油 10 千克 ， 用 去 了 (4/5) 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1312", "content": "小 明 看 一本 故事书 ， 如果 每天 看 36 页 ， 25 天 看 完 ， 如果 每天 看 45 页 ， 需 几天 看 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "960", "content": "向阳 村 修 一条 公路 ， 第一天 修 了 这 条 公路 的 40% ， 第 二 天 修 了 这 条 公路 的 25% ， 两天 一共 修 了 455 米 ， 这 条 公路 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3124", "content": "一 批 货物 120 吨 ， (3/4) 小时 运走 了 它 的 (1/4) ． 平均 每 小时 运 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8282", "content": "某 公司 为了 更好 地 发展 ， 将 每年 15% 的 利润 作为 第 二 年 的 新 产品开发 经费 ． 去年 该 公司 获得 450 万元 利润 ， 今年 用于 新 产品开发 的 经费 = 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15965", "content": "树 人 小学 开展 “ 手拉手 献爱心 ” 活动 ， 计划 向 贫困山区 捐款 8000 元 ， 先 邮汇 计划 捐款 数 的 (1/4) ， 后来 又 邮汇 了 7400 元 ． 实际 捐款 超过 计划 百分之几 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "836", "content": "立新 小学 体育 室 买 了 8 个 篮球 和 12 个 排球 ， 已知 每个 篮球 28 元 ， 每个 排球 20 元 ， 共 需 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10843", "content": "一 个 长方形 面积 是 24.6 平方米 ， 长 是 6 米 ， 宽 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1700", "content": "甲 、 乙 两艘 轮船 分别 从 两个 码头 同时 相向 而 行 ． 甲 船 每 小时 行 40 海里 ， 乙 船 每 小时 行 28 海里 ， 两 船 行驶 4 小时 后 还 相距 30 海里 ． 甲 、 乙 两个 码头 相距 多少 海里 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12550", "content": "一 张 桌子 是 64 元 ， 一把 椅子 是 36 元 ， 公司 买 了 30 套 桌椅 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21824", "content": "宏 星 电脑公司 运 来 电脑 738 台 ， 已经 卖 了 15 天 ， 还 剩 168 台 没有 卖 ， 问 平均 每天 卖 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12674", "content": "甲 、 乙 两辆 汽车 从 相距 360 千米 的 两地 相对 开出 ， 甲 每 小时 行 64 千米 ， 乙 车 的 速度 是 甲 车 的 (7/8) ， 经过 几小时 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20050", "content": "某 工厂 甲 、 乙 两个 车间 人数 的 比 是 4 ： 3 ， 因 工作 需要 从 甲 车间 调 10 人 到 乙 车 ， 这时 乙 车间 人数 占 两个 车间 人数 的 (2/4) ， 现在 乙 车间 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5700", "content": "食堂 订购 了 2700 千克 萝卜 ， 十 月份 送来 了 订单 的 (2/5) ， 第一周 消耗 了 来 货 的 (1/3) ． 食堂 第一周 用 掉 了 多少 萝卜 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3454", "content": "小民 的 体重 是 30 千克 ， 是 他 哥哥 体重 的   (5/6) ， 他 哥哥 的 体重 是 他 爸爸 体重 的 (1/2) ， 他 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19789", "content": "商店 有 苹果 1200 千克 ， 梨 比 苹果 还 多 25% ． 商店 有 梨 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "348", "content": "某次 竞赛 共有 25 道 题 ， 规定 做 对 一 题 得 8 分 ， 做 错 或 不 做 一 题 倒扣 4 分 ． 此次 竞赛 小 明 得 了 128 分 ， 那么 ， 他 做 对 了 多少 道 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12231", "content": "小 华 家 有 一桶 矿泉水 ， 共 16 千克 ， 第一天 用 去 整桶 水 的 (1/10) ， 第 二 天 用 去 整桶 水 的 12.5% ， 两天 一共 用水 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19940", "content": "盒子 里 装有 8 个 红球 ， 3 个 白 球 ， 1 个 黑 球 ， 任意 从中 摸 出 一个 球 ， 摸 到 白 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16533", "content": "多少 增加 (1/5) 后 是 30 千克 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19462", "content": "一 节 美术课 40 分钟 ， 学生 欣赏 用 了 这 节 课 的 (1/5) ， 老师 讲解 用 了 这 节 课 的 (3/10) ， 剩余时间 学生 自主 创作 ． 学生 自主 创作 用 了 这 节 课 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "830", "content": "春 芽 童装 厂 原有 450 人 ， 其中 女工 占 36% ， 今年 又 招进 一批 女工 ， 这时 女工 人数 占 全厂 人数 的 (2/5) ， 今年 招进 女工 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4522", "content": "在 计算 82 + 47 - 11 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 结果 得 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22262", "content": "张 亮 家 离 学校 3600 米 ， 放学 后 他 从 学校 回家 ， 同时 他 妈妈 从 家 骑 电动车 来 接 张 亮 ， 12 分钟 后 两 人 相遇 ． 已知 张 亮 和 妈妈 的 速度 比 是 1 ： 4 ， 张 亮 每分钟 行 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13281", "content": "一 堆 沙 ， 先 用 去 它 的 (3/10) 后 ， 又 运 来 34 吨 ， 这时 沙 的 吨数 是 原来 的 (9/8) ， 用 去 多少 吨 沙 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11088", "content": "妈妈 用 200 元 买 了 一只 高压锅 ， 找回 12.4 元 ， 这 只 高压锅 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20978", "content": "甲 、 乙 两车 同时 从 两地 相对 开出 ， 两地 相距 285 千米 ， 5 小时 后 相遇 ． 甲 车 每 小时 行 30 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16332", "content": "妈妈 在 菜市场 买 了 2.5 千克 西红柿 ， 付给 售货员 20 元 钱 后 ， 找回 5 元 ， 每千克 西红柿 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22458", "content": "某 商店 本月 支出 水电费 425 元 ， 本月 的 水电费 比 上 月 节约 了 15% ， 上 月 支出 水电费 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "707", "content": "星期天 ， 小 聪 和 妈妈 去 水果 批发市场 购进 8 筐 苹果 ， 每 筐 35 千克 ， 又 购进 340 千克 梨 ． 小 聪 和 妈妈 共 购进 这 两种 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13682", "content": "把 3 公斤 20% 的 盐水 与 1 公斤 30% 的 盐水 混合 后 ， 求 盐水 的 浓度 是 百分之几 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17893", "content": "一 辆 汽车 的 速度 是 65 千米 / 时 ， 它 从 甲地 出发 到 400 千米 处 的 乙地 ， 上午 已经 行 了 140 千米 ， 下午 还要 行 几小时 才能 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16810", "content": "操场上 有 180 名 同学 在 锻炼身体 ， 其中 女生 占 总 人数 的 (2/9) ， 后来 又 来 了 几名 女生 ， 这时 女生 人数 占 总 人数 的 (1/3) ， 后来 又 来 了 几名 女生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9624", "content": "一 块 正方体 的 石料 ， 棱 长 8 分 米 ， 如果 1 立方分米 的 石料 重 3.6 千克 ， 这块 石料 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "7371", "content": "一 种 电冰箱 ， 现在 每 台 的 价格 是 1840 元 ， 比 原价 降低 了 20% ， 原来 每 台 的 价格 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7523", "content": "四年级 同学 准备 制作 234 个 手工艺品 ， 已经 做 了 94 个 ， 剩下 的 分给 35 个 同学 去 做 ， 平均 每人 要 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7589", "content": "多少 / 57 = 20 … 5 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14367", "content": "学校 图书馆 原有 一批 故事书 ， 高年级 学生 借 走 40% 后 ， 管理员 又 从 新华书店 买来 180 本 ， 新 买来 的 故事书 刚好 相当于 借 走 前 这 批 故事书 的 25% ， 高年级 学生 借 走 故事书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16318", "content": "水果店 运 来 梨 和 苹果 各 9 箱 ， 梨 共 重 270 千克 ， 苹果 共 重 180 千克 ， 每箱 梨 比 每箱 苹果 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14208", "content": "学校 买 回 8 箱 练习本 ， 每箱 48 本 ， 准备 平均 分给 6 个 级 ， 每个 年级 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13033", "content": "甲 、 乙 两 轮船 同时 从 相距 245 千米 的 两 码头 相对 开出 ， 航行 了 5 时 相遇 ， 甲 船 每 时 行 23 千米 ， 乙 船 每 时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22731", "content": "一 辆 客车 每 小时 行 75 千米 ， 是 轿车 的 (5/6) ， 轿车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2043", "content": "纳税 是 每个 公民 应 尽 的 义务 ． 开 饭店 的 张 叔叔 上 月 营业额 是 86700 元 ， 如果 按 5% 的 税率 缴纳 营业税 ， 张 叔叔 上 月 应 缴 营业税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6948", "content": "水果店 卖出 苹果 140 千克 ， 卖出 的 橘子 比 苹果 多 (2/7) ， 卖出 橘子 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "138", "content": "把 2 克 盐 溶解 在 200 克 的 水 里面 ， 盐 的 质量 占 盐水 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6293", "content": "一 只 啄木鸟 每天 能 吃 645 只 害虫 ， 一只 青蛙 8 天 可 吃 608 只 害虫 ， 一只 啄木鸟 和 一只 青蛙 每天 共 吃 多少 只 害虫 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17434", "content": "一 条 路 15 千米 ， 9 天 修 完 ， 平均 每天 修 这 条 路 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20990", "content": "粮 店里 大米 售价 为 每千克 2.08 元 ， 王大妈 买 9.5 千克 大米 ， 要 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2513", "content": "一 只 大 像 重 4 吨 ， 一头 鲸鱼 重 145 吨 ， 鲸鱼 的 体重 是 大象 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11382", "content": "3 台 拖拉机 (2/3) 小时 耕地 (6/5) 公顷 ， 每 台 拖拉机 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18399", "content": "小 红 看 一本 故事书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 25% ， 这 两天 一共 看 了 36 页 ． 这本 故事书 一共 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "582", "content": "5 个 同学 排队 打 饭 ， 迎 迎 排 在 第一位 ， 她 打 饭 花 了 2 分钟 ， 她 后面 的 同学 一共 等待 了 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4928", "content": "3 头牛 和 2 匹 马 每天 吃 草 80 千克 ， 5 头牛 和 4 匹 马 每天 吃 草 140 千克 ， 则 每 头牛 和 每匹 马 平均 一天 共 吃 草 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "800", "content": "李 明 加印 了 16 张 照片 ， 每张 照片 0.55 元 ， 他 一共 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4801", "content": "甲乙 两车 同时 从 相距 510 千米 的 两地 相向 而 行 ， 甲 车 每 小时 行 49.6 千米 ， 比 乙 车 每 小时 慢 0.8 千米 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3819", "content": "除数 是 5 ， 商 是 14 ， 余数 是 2 ， 那么 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "668", "content": "晨光 小学 六年级 一班 的 人数 是 本 年级 人数 的 (1/3) ， 六年级 人数 是 全校 总 人数 的 (1/6) ， 六年级 一班 有 48 人 ， 晨光 小学 全校 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2699", "content": "某 汽车 制造厂 上半年 生产 小汽车 2400 辆 ， 下半年 比 上半年 增产 20% ， 问 该 汽车厂 这 一年 共 生产 小汽车 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "190", "content": "师徒 二 人 共同 加工 零件 960 个 ， 他们 工作 4 天 后 ， 还 剩下 240 个 没有 加工 ． 徒弟 每天 加工 83 个 ， 师傅 每天 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1418", "content": "落 圈 小学 六年级 56 个 学生 ， 其中 女生 占 (4/7) ， 后来 转 进 几个 女同学 ， 这时 女同学 占 全班 人数 的 (3/5) ． 转 进 多少 个 女同学 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17037", "content": "400 名 少先队员 乘坐 10 辆 大客车 去 秋游 ， 前 9 辆车 每辆 乘坐 43 人 ， 最后 一辆车 要 坐 多少 个 同学 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20255", "content": "张老师 带 300 元 买 作文选 ． 买 了 32 本 作文选 ， 剩 12 元 ． 每 本 作文选 的 价钱 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20683", "content": "一 块 菜地 480 平方米 ， 其中 的 (1/2) 种 白菜 ， (2/5) 种 西红柿 ， 剩下 的 种 大葱 ， 种 大葱 的 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2313", "content": "一 款 led 电视 商场 标价 是 4000 元 ， 小 明 妈妈 上网 参加 团购 ， 只 需要 2400 元 ， 小 明 妈妈 上网 购买 这 款 电视 比 商场 便宜 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22861", "content": "某校 选出 50 名 学生 参加 区 作文 比赛 和 数学 比赛 ， 结果 3 人 两项 比赛 都 获奖 了 ， 有 27 人 两项 比赛 都 没有 获奖 ， 已知 作文 比赛 获奖 的 有 14 人 ， 问 数学 比赛 获奖 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6864", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 余下 的 (1/4) ， 还 剩 300 米 没有 修 ， 这 条 水渠 总长 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21739", "content": "元旦 文艺表演 ， 上场 的 同学 共 407 人 ， 其中 未 得奖 的 女同学 占 女同学 人数 的 (1/9) ， 未 得奖 的 男同学 有 16 人 ， 得奖 的 男 、 女同学 人数 相等 ． 问 演出 的 女同学 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12957", "content": "护林 队 有 12 人 参加 植树 ， 按计划 平均 每人 要 栽 20 棵 ． 实际 植树 时 有 2 人 被 调 走 ， 其他人 仍然 ， 按计划 完成 了 植树 任务 ， 这样 每人 实际 栽 了 多少 棵 树 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22118", "content": "书架上 有 26 本 连环画 ， 故事书 的 本 数 是 连环画 的 2 倍 ， 科技 书 比 故事书 和 连环 的 总数 还 多 8 本 ， 书架上 有 科技 书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17769", "content": "小 明 今天上午 练 了 100 个 字 ， 下午 练 了 140 个 字 ， 今天 练字 的 个数 相当于 昨天 的 (2/3) ， 小 明 昨天 练 了 多少 个 字 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20038", "content": "在 一个 正方形 花坛 的 4 条 边 摆 上 盆花 ， 每 条 边 摆 6 盆 ， 4 个 角 都 要 摆 1 盆 ， 共 需 多少 盆花 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13660", "content": "有 一根 12 米 长 的 绳子 第一次 用 去 它 的 (1/4) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6280", "content": "工人 叔叔 加工 一批 零件 ， 加工 了 (1/4) ， 还 剩下 96 个 没 加工 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10414", "content": "张 帅 把 1000 元 人民币 存入 银行 ， 存 定期 一年 ， 年利率 为 4.14% ， 到期 时 ， 他 可 取回 多少 元 ． （ 利息税 为 5% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "1578", "content": "修路 队 修 一条 路 ， 已 修好 的 与 未 修好 的 长度 的 比 是 1 ： 5 ． 再 修 350 米 后 ， 已 修好 的 与 未 修 的 长度 的 比值 正好 是 3 ． 这 条 路 全长 多少 米 ？ （ 友情 提醒 ： 转化 的 策略 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21031", "content": "幼儿园 买来 一些 苹果 ， 如果 每人 分 4 个 ， 正好 可以 分给 30 个 小朋友 ； 如果 分 6 个 ， 这些 苹果 可以 分给 多少 个 小朋友 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13753", "content": "在 一段 公路 的 一旁 共 种 95 棵 树 ， 两头 都 种 ， 每 两棵树 之间 相隔 5 米 ， 这 段 公路 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12822", "content": "在 一个 长 12 厘米 ， 高 8 厘米 的 长方体 水箱 中 浸没 一具 棱 长 为 6 厘米 的 立方体 ， 水面 上升 2 厘米 ， 则 这个 长方体 水箱 的 宽 = 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22300", "content": "有 一片 牧场 ， 草 每天 均匀 地 长 ． 24 头牛 6 天 可 吃 完 ； 21 头牛 8 天 可 吃 完 ． 要 使 草 永远 吃不完 ， 至多 放 多少 头牛 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4679", "content": "把 640 平均 分成 多少 份 ， 每份 是 8 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19359", "content": "埃及 某 金字塔 现在 高度 比 建成 时 低 了 (1/21) ， 现在 高 140 米 ， 建成 时 高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "938", "content": "一 个数 缩小 到 原来 的 (1/56) 得 140 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14497", "content": "学校 买来 4 个 排球 和 一些 篮球 ， 排球 每个 28 元 ， 篮球 每个 35 元 ， 共用 357 元 ， 学校 买 了 多少 个 篮球 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14668", "content": "王师傅 生产 一批 零件 ， 他 完成 了 70% ． 以后 又 生产 了 350 个 ， 这样 比 原 计划 超产 20% ， 王师傅 计划 生产 零件 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20733", "content": "6 辆 汽车 3.5 天 共 节约 汽油 90.3 千克 ， 平均 每辆 汽车 每天 节油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18860", "content": "水果店 运 来 185 筐 水果 ， 其中 有 118 筐 苹果 ， 其余 的 是 梨 ， 梨 比 苹果 少 几 筐 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21450", "content": "计算 ： 2004.05 * 1997.05 - 2001.05 * 1999.05 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9230", "content": "一 个数 与 它 的 25% 的 差 是 15 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4007", "content": "320 + 480 的 和 除 160 的 5 倍 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2183", "content": "小 刚 和小红 都 从 a 地 到 b 地 ， 小 刚 骑 自行车 ， 每分钟 行 300 米 ， 小 红 步行 ， 每分钟 行 100 米 ， 小 红 出发 5 分钟 后 ， 小 刚才 出发 ， 经过 多少 分钟 小 刚 可以 追 上 小 红 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23052", "content": "妈妈 给 小 明 一个 大 盒子 ， 里面 装 着 6 个 纸盒子 ， 每个 纸盒子 又 装 4 个 小盒子 ， 小 明 一共 有 多少 个 盒子 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "897", "content": "王老师 要 批改 48 篇 作文 ， 已经 批 了 24 篇 ． 如果 剩下 的 每 小时 批改 8 篇 ， 还要 几个 小时 才能 批 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13058", "content": "学校 准备 开 运动会 ， 买来 22 箱 汽水 ， 买 汽水 的 箱 数 比 矿泉水 多 (4/7) ， 买 了 多少 箱 矿泉水 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5258", "content": "菜场 有 西红柿 240 千克 ， 是 黄瓜 的 6 倍 ， 黄瓜 比 西红柿 少 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17712", "content": "有 一堆 货物 重 252 吨 ， 若 用 汽车 运输 ， 每次 可 运走 63 吨 ， 需要 多少 次 才能 将 所有 的 货物 运走 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10611", "content": "在 人体 中 ， 血液 约 占 体重 的 (1/13) ， 血液 里 约 含 (2/3) 的 水 ， 爸爸 的 体重 是 69 千克 ， 爸爸 的 血液 里 约 含水 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9730", "content": "学校 合唱团 有 男生 30 人 ， 占 总 人数 的 (2/5) ， 合唱团 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3638", "content": "粮店 运 来 450 袋 大米 ， 第一天 卖出 了 一部分 ， 还 剩 总 袋 数 的 74% ， 卖出 了 多少 袋 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22000", "content": "有 一块 近似 平行四边形 的 果园 ， 底 是 280 米 ， 高 135 米 ． 平均 每棵 果树 占地 4.5 平方米 ， 一共 能 栽 多少 棵 果树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13310", "content": "3.75 * 31 + 62.5 * 3.1 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22347", "content": "六年级 共有 男生 60 人 ， 比 女生 多 (1/5) ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9022", "content": "希望 小学 的 学生 为 地震 灾区 捐款 ， 平均 每个 班 捐 98 元 ， 全校 有 6 个 年级 ， 每个 年级 有 3 个 班 ， 他们 一共 捐 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4207", "content": "一 盒 糖 连 盒 共 重 500 克 ， 吃掉 糖 的 (1/3) 后 ， 余下 的 糖 连 盒 重 350 克 ， 空盒 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12799", "content": "一 本 共 144 页 的 故事书 ， 小 娟 8 天 看 完 ， 小 冬 12 天 看 完 ． 小 娟 比 小 冬 平均 每天 多 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11737", "content": "小 军 的 飞机 模型 在 空中 飞行 12 分钟 ， 小 明 的 飞机 模型 飞行 的 时间 比 小 军 的 短 (1/4) ． 小 明 的 飞机 模型 飞行 了 几分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5567", "content": "某 小学 有 学生 840 人 ， 一年级 人数 占 全校学生 人数 的 (2/7) ， 一年级 男生 占 全年 级 人数 的 (5/8) ， 一年级 男生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8035", "content": "小 明 看 一 本书 ， 第一天 看 了 65 页 ， 第 二 天 看 了 余下 的 35% ， 这时 已 看 的 页数 与 剩下 的 页数 正好 相等 ， 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16090", "content": "码头 有 堆 黄沙 ． 一辆 卡车 一次 能 运走 6 吨 ， 已经 运走 了 13 次 ． 还 剩下 500 吨 的 黄沙 没 运走 ． 码头 原来 有 多少 吨 黄沙 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21102", "content": "某 工程兵 部队 计划 在 一周 内 修 一条 公路 ， 前 3 天 共 修 6.8 千米 ， 后 4 天 平均 每天 修 2.5 千米 ， 这 一周 平均 每天 修 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17177", "content": "甲地 到 乙地 的 公路 全长 240 千米 ． 一辆 汽车 走 高速公路 的 速度 是 80 千米 / 小时 ， 走 普通 路 的 速度 是 40 千米 / 小时 ． 从 甲地 到 乙地 走 高速公路 比 走 普通 公路 节约 多长时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8231", "content": "一 本书 有 120 页 ， 已 看 了 30 页 ， 已 看 了 的 页数 占 这 本书 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4720", "content": "某校 选出 男 教师 的 (1/11) 和 女 教师 12 人 参加 广播操 比赛 ， 剩下 的 男 教师 人数 是 剩下 女 教师 人数 的 2 倍 ， 已知 学校 共有 男女 教师 156 名 ， 男 教师 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3640", "content": "学校 要 买 20 个 篮球 和 60 个 实心球 ， 共用 去 1380 元 ， 已知 篮球 单价 为 31.5 元 ， 实心球 单价 为 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16264", "content": "现在 买 一台 彩色 电视机 用 1900 元 ． 比 原来 少 用 600 元 ， 彩色 电视机 售价 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2637", "content": "小 丽 今年 7 岁 ， 爸爸 的 年龄 比 小 丽 的 4 倍 多 5 岁 ， 爸爸 的 年龄 是 几岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8691", "content": "5 （ 2 ） 班 有 男生 35 人 ， 占 全班 人数 的 (5/7) ． 全班 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17819", "content": "同学 们 参加 环保 活动 ， 三年级 同学 一共 收集 可回收 废品 58 千克 ， 四年级 收集 的 是 三年级 的 2 倍数 ， 五年级 收集 的 比 3 、 四年级 的 总数 少 13 千克 ， 五年级 收集 了 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22628", "content": "50 元 的 一 本书 打 0.75 出售 ， 则 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12366", "content": "3675 - （ 11 + 13 + 15 + 17 + 19 ） = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "10689", "content": "一 个 收购站 运走 鸡蛋 60 箱 和   鸭蛋 48 箱 ， 每箱 鸡蛋 重 40 千克 ， 每箱 鸭子 重 35 千克 ． 一共 运走 禽蛋 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14389", "content": "一 段 钢材 长 8 米 ， 做 一个 零件 用 (3/8) 米 ． 已经 做 了 20 个 这样 的 零件 ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22082", "content": "一 个 上下 两层 的 书架 ， 若 从 下层 取出 20 本书 放入 上层 ， 则 上层 的 书 比 下层 的 书 少 (1/4) ． 已知 上层 原来 有 100 本书 ， 下层 原来 有 多少 本书 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2611", "content": "某 农场 实际 改造 盐碱地 10.5 公顷 ， 比 原 计划 多 改造 5% ， 原 计划 改造 盐碱地 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20080", "content": "乌龟 1 分钟 可以 爬 1.6 米 ． 照 这样 的 速度 ． 乌龟 爬 19.2 米 要 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3060", "content": "希望 小学 有 学生 503 人 ， 某 乡 有 这样 的 小学 19 所 ． 这个 乡 大约 有 多少 名 小学生 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18177", "content": "小 杰 读 一本 120 页 的 书 ， 已知 第一天 读 了 全书 的 (1/4) ， 则 第一天 读 了 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22099", "content": "学校 买 了 3 套 办公 桌椅 ， 共用 去 795 元 ． 平均 每套 办公 桌椅 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15438", "content": "一 根 绳子 剪 去 (2/5) 后 ． 还 剩 15 米 ， 这根 绳子 原来 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6029", "content": "某 修路 队 修 一条 长 7.2 千米 的 公路 ， 前 6 天 修 了 4.32 千米 ． 照 这样 计算 ， 剩下 的 还要 几天 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10552", "content": "两列 火车 从 相距 600 千米 的 两城 同时 相对 开出 ． 一列 火车 每 小时 行 60 千米 ， 另 一列 火车 每 小时 行 75 千米 ． 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3330", "content": "跳绳 比赛 规定 每人 跳 5 分钟 ， 王平 共 跳 337 下 ， 张 华 平均 每分钟 比 王平 多 跳 12 下 ， 张 华 一共 跳 了 多少 下 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6946", "content": "从 6072 / 12 的 商 里 减去 35 与 9 的 积 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13944", "content": "陈 小 红 的 年龄 比 陈 小 兰大 4 岁 ， 陈 小 红 的 年龄 比 陈 小 兰 的 年龄 多 (1/3) ． 陈 小 兰 的 年龄 是 多 大 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7846", "content": "学校 买来 20 个 排球 ， 买来 的 足球 比 排球 多 (1/4) ． 买来 的 足球 比 排球 多 几个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14374", "content": "一 个 修路 队 要 修 一段 长 900 米 的 公路 ， 头 5 天 修 了 300 米 ． 照 这样 计算 ， 剩下 的 要 修 多少 天 才能 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22953", "content": "一 个 长方体 的 宽 是 长 的 (3/4) ， 长 是 高 的 (8/5) ． 它 的 宽 是 24 厘米 ， 它 的 高 = 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16121", "content": "商店 运进 大米 4700 千克 ， 卖出 36 袋 后 ， 还 剩 2900 千克 ． 平均 每 袋 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9491", "content": "一 个数 的 (4/5) 是 50 的 (2/5) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20334", "content": "把 一根 (14/5) 米 长 的 绳子 剪成 同样 长 的 7 段 ， 每 段长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "611", "content": "李 大伯 养 了 240 只 鸡 ， 第一天 卖出 104 只 ， 剩下 的 每 8 只 装 一 笼 ， 能 装满 多少 笼 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7232", "content": "今年 10 月份 李 明 家 用电 131 度 ， 王 强 家 用电 120 度 ， 王 强 家 少 缴 电费 5.5 元 ． 平均 每 度 电 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16544", "content": "妈妈 买 了 6 千克 橘子 ， 每千克 3.8 元 ， 还 剩 7.72 元 ， 她 原来 有 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10254", "content": "建设银行 某种 一年期 债券 ， 小 王 买 了 1000 元 ， 到期 他 取出 本金 和 利息 共 1036 元 ， 这种 债券 的 年利率 = ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5245", "content": "修路 队 修 一条 公路 ， 第一天 修 了 3.45 千米 ， 比 第 二 天 多 修 了 0.68 千米 ， 两天 共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8073", "content": "妈妈 买 了 2.4 千克 苹果 ， 每千克 6.5 元 ， 付钱 时 售货员 找回 4.4 元 ， 妈妈 给 了 售货员 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8626", "content": "一 辆 汽车 每 小时 行驶 39 千米 ， 一架 飞机 每 小时 飞行 的 路程 是 汽车 的 34 倍 ， 这 架飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21308", "content": "从 甲地 到 乙地 坐火车 需 18 小时 ， 坐飞机 比 坐火车 少 用 15 小时 ， 飞机 每 小时 行 735 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9628", "content": "一 个 果园 运走 一批 水果 ， 第一天 运走 了 800 千克 ， 第 二 天 运走 了 1700 千克 ， 两天 正好 运走 了 这 批 水果 的 (5/6) ， 这 批 水果 一共 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5888", "content": "两站 相距 585 千米 ． 甲 、 乙 两车 同时 从 两站 相对 开出 ， 甲 车 的 速度 是 每 小时 行 60 千米 ， 乙 车 的 速度 是 每 小时 行 70 千米 ． 那么 两车 开出 后 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10939", "content": "筑路 队 修筑 一条 公路 ． 已经 修 了 4.5 千米 ， 剩下 的 比 修 了 的 2.5 倍 多 5 千米 ， 还 剩 多少 千米 没 修 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8489", "content": "某 车间 男 职工 占 总 人数 的 (3/5) ， 女职工 有 40 人 ， 这个 车间 共有 职工 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14772", "content": "王 强 看 一本 科技 书 ， 已经 看 了 全书 的 (5/8) ， 还 剩 90 页 ． 这本 科技 书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4292", "content": "一 个 小型 家禽 饲养场 里 鸡 、 鸭 、 鹅 只 数 的 比 是 5 ： 3 ： 2 ， 其中 养鸡 200 只 ， 养鸭 多少 只 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18965", "content": "一 个 电影院 楼上楼下 共有 座位 57 排 ， 每排 可以 坐 32 人 ， 其中 楼上 有 座位 17 排 ， 楼下 可以 坐 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6935", "content": "小 明 骑 自行车 ， 0.4 小时 行 了 3.4 千米 ． 照 这样 的 速度 ， 他 骑 自行车 到 距离 5.1 千米 远 的 公园 去 游玩 ， 大约 需要 多长时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18175", "content": "要 铺 1500 米 的 公路 ， 前 6 天 完成 了 40% ， 照 这样 计算 ， 铺 完 这 条 公路 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17688", "content": "24 个 同学 在 操场上 围成 一个 圆圈 做 游戏 ， 每 相邻 两名 同学 之间 都 是 2 米 ． 这个 圆圈 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19075", "content": "一 个 圆柱形 铁皮 盒 ， 底面 半径 是 2 分 米 ， 高 5 分 米 ， 在 这个 盒子 的 侧面 帖 上 商标纸 ， 需 多少 平方米 的 纸 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "12232", "content": "一 本 《 童话 大王 》 共 96 页 ， 小 明 第一天 看 了 全书 总 页数 的 (5/48) ， 第 二 天 看 了 全书 总 页数 的 (1/8) ， 他 两天 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7513", "content": "李师傅 生产 8 个 零件 ， 用 去 钢材 (14/15) 千克 ， 平均 每个 零件 用 钢材 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8017", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 450 米 ， 正好 是 第一天 修 的 3 倍 ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4048", "content": "果农 李 大伯 去年 收入 12 万元 ， 今年 比 去年 多 收入 (1/3) ． 今年 收入 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3633", "content": "把 一根 2 米 ． 地 面积 为 3.14 平方分米 的 圆柱形 钢材 截 成 相等 的 两段 ， 表面积 增加 了 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10796", "content": "一 种 电视机 ， 原价 4500 元 ， 厂方 为 促销 ， 特 降价 15% ， 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22987", "content": "某 商店 原有 黑白 、 彩色 电视机 共 630 台 ， 其中 黑白 电视机 占 (1/5) ， 后来 又 运进 一些 黑白 电视机 ． 这时 黑白 电视机 占 两种 电视机 总 台数 的 (3/10) ， 问 ： 又 运进 黑白 电视机 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1925", "content": "某种 商品 按 成本 的 25% 的 利润 为 定价 ， 然后 为 吸引 顾客 又 打着 0.9 的 优惠 措施 卖出 ， 结果 商家 获利 700 元 ． 这种 商品 的 成本价 = 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11638", "content": "同学 们 栽树 ， 四年级 载 了 28 棵 ， 五年级 载 的 棵 数 比 四年级 的 5 倍 少 3 棵 ， 五年级 比 四年级 多载 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22815", "content": "从 a 地 到 b 地 全程 有 1.5 千米 ， 甲 用 了 9.7 分钟 跑 完全 程 ， 乙 比 他 多用 2 分钟 跑 完全 程 ， 乙 平均 跑 1 千米 需 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19492", "content": "淘气 打算 把 两根 长度 都 是 1.96 米 的 绳子 接 起来 做 一根 跳绳 ， 结果 接口处 共用 去 了 0.19 米 ， 接 好 后 的 绳子 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "219", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 平均 每 小时 行 56 千米 ， 3 小时 行 的 路程 正好 比 全程 的 (2/5) 多 4 千米 ． 从 甲地 到 乙地 全程 为 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2746", "content": "一 桶 油 ， 第一次 取出 20 千克 ， 第 二 次 取出 这 桶 油 的 (2/5) ， 桶 里 还 剩下 40 千克 ， 这 桶 油 重 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10153", "content": "空气 的 成分 中 ， 氧气 约 占 20% ， 其他 物质 约 占 空气 成分 的 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13988", "content": "已知 两个 因数 的 积 是 (15/16) ， 其中 一个 因数 是 10 ， 另 一个 因数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8147", "content": "花 房里 有 84 盆 月季花 ， 是 茉莉花 盆 数 的 4 倍 ． 有 茉莉花 多少 盆 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11611", "content": "操场上 30 名 同学 站 成 一列 ， 每 两个 人 之间 的 距离 是 0.6 米 ， 排头 到 排尾 的 距离 = 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "444", "content": "一 种 彩色 电视机 原价 每 台 2400 元 ， 现在 每 台 售价 比 原来 提价 10% ． 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1895", "content": "用 10 米 长 的 彩绸 做 小旗 ， 平均 每 面 小旗 用 彩绸 (1/8) 米 ， 这些 小旗 的 (4/5) 用来 装饰 教室 ， 装饰 教室 的 小旗 有 多少 面 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21220", "content": "大米 每千克 4.5 元 ， 买 10.5 千克 需 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15918", "content": "王老师 买 了 两本 参考书 ． 《 小学 数学 教学 指导 》 12.3 元 ， 《 数学 手册 》 比 《 小学 数学 教学 指导 》 多 4.2 元 ． 王老师 应付 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14835", "content": "一 个数 的 (4/9) 是 120 ， 这个 数 的 (1/2) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14554", "content": "王 教授 的 月工资 是 9000 元 ， 按照 国家 规定 ， 工资总额 减去 3500 元 后 ， 按照 20% 交纳 个人所得税 ， 王 教授 每月 应交 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4367", "content": "小 明 妈妈 在 银行存款 2000 元 ， 定期 一年 ， 如果 按 年利率 4.14% 计算 ， 到期 后 可 得 利息 多少 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9003", "content": "食堂 有 面粉 260 千克 ， 有 大米 6 袋 ， 每 袋 25 千克 ． 面粉 比 大米 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5204", "content": "从 630 里 连续 减去 多少 个 90 ， 得数 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11071", "content": "一 件 电器 售价 135 元 ， 比 原价 降低 15 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3546", "content": "3.42 * 76.3 + 7.63 * 57.6 + 9.18 * 23.7 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "16920", "content": "一 个 工厂 每天 原来 生产 1800 个 零件 ， 比 现在 少 10% ， 现在 每天 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3172", "content": "放假 了 ， 小 红 要 去 奶奶家 ， 原来 乘火车 需 10 小时 ， 现在 8 小时 就 能 到 ， 现在 乘火车 去 奶奶家 的 时间 比 原来 节省 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6676", "content": "一 个 养猪 专业户 ， 去年 养猪 28 头 ， 今年 养猪 40 头 ， 平均 每 头 猪 收入 250 元 ， 今年 比 去年 多 收入 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5984", "content": "小 明 做 家庭作业 ， 语文 用 了 (3/7) 小时 ， 比 数学 少 用 了 (2/7) 小时 ， 两项 作业 一 共用 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19494", "content": "五年级 有 女生 80 人 ， 男生 比 女生 少 10% ， 五年级 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5523", "content": "箱子 里 有 兵 乓 球 若干个 ， 其中 25% 是 一级品 ， (2/5) 是 二 级 品 ， 其余 的 91 个 是 3 级 品 ， 箱子 里 一共 有 兵 乓 球 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11039", "content": "有 10 名 男生 ， 6 名 女生 参加 混双 羽毛球 比赛 ， 有 多少 种 搭配 方式 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5113", "content": "三年级 有 女生 38 人 ， 男生 44 人 ． 三年级 共有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2917", "content": "小 红 从 家 到 学校 845 米 共 走 了 13 分 ， 她 用 同样 的 速度 ， 从 家 到 新华书店 有 390 米 ， 要 走 几分 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19791", "content": "小 红 的 妈妈 在 0.8 区 购买 了 一件 原价 300 元 的 上衣 ， 又 在 0.7 区 以 现价 120 元 购买 了 一条 裙子 ， 小 红 的 妈妈 共 付出 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10801", "content": "修 一条 500 米 的 公路 ， 已经 修 了 (2/5) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3518", "content": "(7/8) 的 20% 相当于 一个 数 的 (14/15) ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8781", "content": "甲乙 两个 城市 相距 595 千米 ， 一辆 快车 从 甲 城 开出 ， 同时 有 一辆 慢车 从 乙 城 开出 ， 两车 相向 而 行 ， 经过 5 小时 相遇 ． 已知 慢车 每 小时 行 45 千米 ， 那么 ， 快车 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9977", "content": "一 个 长方体 玻璃 水箱 ， 长 30 厘米 ， 宽 20 厘米 ， 高 50 厘米 ， 如果 往 这个 水箱 里 注水 ， 当 水 的 形状 第 二 次 出现 相对 的 面 是 正方形 时 ， 注入 的 水 有 多少 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18137", "content": "小 刚 买 了 一个 篮球 和 一个 排球 ， 篮球 价格 是 排球 的 3 倍 ， 排球 比 篮球 便宜 68 元 ， 篮球 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6791", "content": "小 云 绣 十 字 绣 ， 要 绣 1500 针 才能 绣 完 ， 已经 绣 了 总数 的 40% ， 接着 绣 下 一针 应从 第 几针 开始 绣 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5939", "content": "小 方 读 一本 故事书 ， 已经 读 了 42 页 ， 比 剩下 的 少 9 页 ． 这 本书 还 剩下 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22571", "content": "某 工厂 计划 生产 20000 个 零件 ， 前 5 天 平均 每天 生产 2000 个 零件 ， 由于 技术革新 每天 比 原来 多 生产 100 个 零件 ， 完成 这 批 零件 一共 需要 多少 天 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17153", "content": "某班 共有 16 人 ， 人人 参加 竞赛 ， 参加 数学 竞赛 的 有 8 人 ， 参加 作文 竞赛 的 有 11 人 ， 至少 有 多少 人 既 参加 数学 竞赛 又 参加 作文 竞赛 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10339", "content": "甲 数 是 420 ， 比 乙 数多 (1/6) ． 乙 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15283", "content": "李老师 要 批改 98 篇 作文 ， 已经 改 好 了 18 篇 ． 剩下 的 每 小时 批改 16 篇 ， 还要 几小时 才能 全部 批改 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22242", "content": "已知 一个 数 的 5 倍 等于 6.35 与 2.65 的 和 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6047", "content": "小 华 的 身高 是 135 厘米 ， 小龙 比 小 华 高 (1/9) ， 小龙 的 身高 = 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16852", "content": "李 大爷 家 今年 收 苹果 3200 kg ， 比 去年 增产 25% ， 李 大爷 家 去年 收 多少 苹果 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18527", "content": "一 筐 梨 ， 先 拿走 30 kg ， 又 拿出 余下 的 70% ， 这时 剩下 的 梨 正好 是 原来 的 (1/10) ． 这 筐 梨 原来 多少 kg ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18684", "content": "一 对 少先队员 开展 学雷锋 活动 ， 他们 到 汽车站 去 打扫卫生 ， 已知 队伍 排成 4 路 纵队 ， 每排 4 人 ， 共 排 了 10 排 ， 请 你 计算 一下 这 对 少先队员 共有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20019", "content": "一 堆 大米 运往 灾区 ， 运 36 车 才 运走 (3/5) ， 余下 的 大米 还要 运 多少 车 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16564", "content": "小 红 体重 40 千克 ， 比 小 东 体重 的 (2/3) 多 10 千克 ， 小 东 体重 = 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4291", "content": "一 个数 的 5 倍 - 2.5 / 0.5 的 商 ， 差 是 6.5 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22950", "content": "服装厂 计划 生产 1311 套 衣服 ， 己 经 做 了 5 天 ， 平均 每天 做 75 套 ， 剩下 的 要求 每天 做 78 套 ， 还要 多少 天 才能 完成 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19403", "content": "一 种 电视机 ， 原来 每 台 售价 10000 元 ， 现在 每 台 售价 6000 元 ， 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22038", "content": "某校 原有 学生 896 人 ， 毕业 157 人 ， 又 招 新生 204 人 ， 学校 现有 学生 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7627", "content": "一 块 菜地 ， (3/9) 的 地 种 了 茄子 ， 剩下 的 地 种 西红柿 ， 种 西红柿 的 地 占 整块地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10133", "content": "学校 新 买来 48 套 课桌椅 ， 每张 课桌 96 元 ， 每 把 椅子 37 元 ， 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12818", "content": "一 抬 推土机 12 小时 推土 396 立方米 ， 照 这样 计算 ， 要 推土 2277 立方米 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21843", "content": "计算 ： 1348 - 234 - 76 + 2234 - 48 - 24 = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16061", "content": "两个 因数 的 积 是 74 ， 如果 一个 因数 扩大 到 原来 的 6 倍 ， 另 一个 因数 不变 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22514", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 前 5 小时 行驶 了 225 千米 ， 照 这样 计算 ， 再行 3 小时 就 能 达到 乙地 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21134", "content": "学校 中年级 有 学生 240 人 ， 高年级 学生 比 中年级 多 (1/6) ． 高年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4699", "content": "爷爷 的 年龄 是 爸爸 的 2 倍 ， 爸爸 的 年龄 是 儿子 的 7 倍 ， 已知 爷爷 的 年龄 是 70 岁 ， 儿子 的 年龄 是 几岁 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21263", "content": "一 辆 汽车 ， 从 甲地 开往 乙地 ， 行 了 全程 的 (1/3) ， 离 终点 还有 45 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10361", "content": "一 辆 卡车 ， 4 次 运 面粉 136 袋 ， 照 这样 计算 ， 再 运 6 次 ， 一共 可以 运 多少 袋 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3805", "content": "按 一定 的 规律 在 括号 中 填 上 适当 的 数 ： 2 ， 1 ， 3 ， 4 ， 7 ， 多少 ， 18 ， 29 ， 47 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17084", "content": "3.4 与 5.6 的 和 除以 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19347", "content": "一 段 木料 长 8 米 ， 先 用 去 全长 的 (2/5) ， 又 用 去 (1/5) 米 ， 一 共用 去 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13429", "content": "爸爸 买 了 2 袋 味精 ， 付出 50 元 ， 找回 44 元 ． 每 袋 味精 卖 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10864", "content": "48 + 60 的 和 ， 与 25 - 4 的 差 相乘 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14251", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行驶 约 80 千米 ， 用 了 5 小时 ， 返回 时 只用 4 小时 ， 这辆 汽车 返回 时 速度 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21847", "content": "一 本书 有 104 页 ， 小 明 看 了 17 页 ， 剩下 的 要 3 天 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8520", "content": "有 8 箱 可乐 和 13 箱 水 ， 每箱 都 装 24 瓶 ， 一共 多少 瓶 饮料 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4882", "content": "转运 一批 货物 ， 上午 转运 了 总数 的 (2/5) ， 下午 转运 了 28 吨 ， 全天 共 转运 了 总数 的 65% ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14148", "content": "一 种 商品 现价 比 原价 降低 了 (1/5) 后 是 20 元 ， 那么 商品 的 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15904", "content": "一 个数 的 (3/8) 比 180 的 20% 多 24 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22966", "content": "一 个 电视机厂 接受 一批 订货 ， 计划 每天 安装 400 台 ， 25 天 可 完成 任务 ． 但 要求 提前 5 天 交货 ， 每天 要 安装 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10218", "content": "图书馆 有 故事书 800 本 ， 科技 书 的 本 数 是 故事书 的 (5/8) ， 又 是 连环画 的 (2/5) ， 连环画 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17379", "content": "刘 叔叔 开 小汽车 准备 走 高速公路 从 甲地 到 乙地 ． 计划 每 小时 行 90 千米 ， 6 小时 到达 ． 如果 想 提前 一 小时 到达 ， 每 小时 要 行驶 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10832", "content": "商店 运 来 果冻 650 千克 ， 卖出 16 箱 ， 平均 每箱 18 千克 ， 还 剩 多少 千克 果冻 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1949", "content": "用 一根 铁丝 围成 一个 边长 是 8 cm 的 正方形 ， 如果 把 它 拉 成 一个 平行四边形 ， 面积 就 减少 12 cm ^ 2 ， 拉 成 的 平行四边形 的 高 = 多少 cm ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1785", "content": "星光 奶业 生 生产 新鲜 酸奶 ， 某 天 生产 120000 瓶 ， 每 12 瓶装 一盒 ， 每 20 盒装 一箱 ， 这 一天 生产 的 酸奶 一共 可以 装 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16938", "content": "甲 ， 乙 两地 相距 840 千米 ， 两列 火车 分别 从 a 、 b 两地 同时 相对 开出 ， 4 小时 后 相遇 ． 甲 车 的 速度 是 100 千米 / 时 ， 求 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7432", "content": "张 平 每天 上学 从 家 到 学校 要 经过 公园 ， 从 家 到 公园 有 653 米 ， 从 公园 到 学校 有 872 米 ． 张 平 家 到 学校 的 距离 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19861", "content": "(2/3) 的 (1/6) 与 5 相差 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12038", "content": "妈妈 买来 一条 大鱼 ， 小林 问 鱼 有 多重 ， 妈妈 笑 着 说 ： “ (3/4) 千克 再 加上 鱼 质量 的 (1/2) ， 就是 这 条 鱼 的 质量 ． ” 你 能 算 出 这 条 鱼 有 多重 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5952", "content": "一 辆 货车 和 一辆 客车 同时 从 相距 288 千米 的 两地 相向 而 行 ， 经过 1.6 小时 相遇 ， 已知 货车 和 客车 的 速度 比 是 7 ： 8 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21392", "content": "一 箱 矿泉水 有 24 瓶 ， 这个 箱子 和 矿泉水 一共 重 14800 克 ， 箱子 重 400 克 ， 平均 每瓶 矿泉水 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "929", "content": "妈妈 从 家电 商场 买 回 一台 电扇 和 一台 空调 ， 共 花 了 1692 元 ， 已知 空调 价格 是 电扇 的 8 倍 ， 电扇 价格 为 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5732", "content": "化肥厂 5 月份 用电 4500 度 ， 比 4 月份 节约 了 500 度 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12740", "content": "买 服装 买 3 件 衣服 和 5 条 短裤 的 钱 同样 多 ， 每 条 短裤 39 元 ， 每件 衣服 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9394", "content": "有 一堆 橘子 若干个 ， 把 其中 的 (1/3) 给 a ， 余下 的 (1/5) 少 3 个 给 b ， 再 把 余下 的 全部 给 c ， 这样 c 得到 的 个数 比 a 得到 的 多 21 个 ， 这 堆 橘子 共有 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22860", "content": "一 个 圆柱 水桶 的 体积 是 24 立方分米 ， 底 面积 是 7.5 平方分米 ， 里面 装 了 25% 的 水 ， 水面 高 = 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22433", "content": "小 明 从 家 去 商店 买 东西 ， 走 到 500 米处 小 明 发现 忘 了 带 钱 ， 然后 到 回家 去 拿 钱 ， 就 立刻 去 商店 买 东西 ， 已知 小 明 家 和 商店 相距 1000 米 ， 小 明 将 走 多少 米 到 商店 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10221", "content": "实验 小学 师生 向 “ 希望 小学 ” 捐赠 图书 1200 册 ， 其中 文艺 书 占 (2/5) ， 连环画 占 25% ， 其余 都 是 科普读物 ． 捐赠 科普读物 多少 册 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14451", "content": "一 批 零件 ， 甲 、 乙 两 人 单独 完成 所 需 的 时间 比 是 3 ： 5 ． 现 两 人 合作 ， 完成 任务 时 ， 甲 加工 了 250 个 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10010", "content": "如果 把 一根 木料 锯 成 3 段 要 用 12.6 分钟 ， 那么 用 同样 的 速度 把 这根 木料 锯 成 6 段 ， 要 用 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21636", "content": "一 捆 电线 ， 用 去 28.3 米 后 ， 还 剩 37.7 米 ， 这 捆 电线 原来 有 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12487", "content": "一 辆 自行车 的 车轮 直径 是 0.5 米 ， 如果 车轮 每分钟 转 200 周 ， 它 每分钟 前行 多少 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23011", "content": "小 婉 家 今年 小麦 产量 是 2500 千克 ， 比 去年 增产 500 千克 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13169", "content": "花园 小学 ， 新 买来 45 套 单人 课桌椅 ， 每张 桌子 128 桌子 ， 每张 椅子 52 元 ， 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11330", "content": "一 支 施工队 修建 一段 公路 ， 平均 每天 修 165 米 ， 修 了 12 天 后 还 剩下 115 米 ， 这 段 公路 一共 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7179", "content": "修 一条 长 1500 米 的 路 ， 已经 修 了 3 天 ， 还 剩 600 米 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21506", "content": "火车 从 a 地 开往 b 地 ， 每 小时 行 60 千米 ， 6 小时 到达 ， 火车 提速 后 ， 若 要 4 小时 到达 ， 火车 提速 后 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2451", "content": "甲 仓库 存粮 90 吨 ， 乙 仓库 存粮 130 吨 ， 要 使 甲 仓库 存粮 数 是 乙 仓库 的 3 倍 ， 必须 从 乙 仓库 运出 多少 吨 放入 甲 仓库 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19947", "content": "杂技演员 表演 独轮车 走钢丝 ， 车轮 直径 是 0.5 m ． 走过 23.55 m 长 的 钢丝 ， 车轮 要 转动 多少 周 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19279", "content": "果园 里 种 有 桃树 有 400 棵 ， 比 梨树 多 (1/4) ， 果园 所 种 的 桃树 和 梨树 一共 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19078", "content": "学校 的 果园 里 有 梨树 15 棵 ， 苹果树 20 棵 ． 梨树 的 棵 数 比 苹果树 少 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4311", "content": "某 果园 丰收 了 5970 千克 苹果 ， 每个 箱子 可 装 30 千克 ， 这些 苹果 可 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2883", "content": "学校 运动会 ， 五年级 一共 买来 5 箱 矿泉水 ， 每箱 24 瓶 ， 每瓶 1.9 元 ， 一共 要 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1572", "content": "4 、 五年级 的 学生 去 旅游 ． 四年级 有 389 人 ， 五年级 有 403 人 ， 他们 乘坐 定员 36 人 的 大客车 ， 需要 多少 辆 这样 的 车 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1284", "content": "同学 们 做 了 16 朵 红花 ， 做 的 黄花 的 朵 数 是 红花 的 (5/4) ， 又 是 蓝花 的 (10/11) ． 做 的 蓝花 有 多少 朵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1209", "content": "一 根 绳子 截去 (2/5) ， 正好 截去 了 4 米 ， 如果 截去 (3/10) ， 要 截去 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8554", "content": "一 种 商品 ， 如果 打 0.7 出售 ， 要 比 原价 便宜 270 元 ． 如果 按 0.55 出售 ， 要 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11022", "content": "一 堂 课 ， 学生 自主 探究 时间 占 了 (1/5) ， 教师 讲解 时间 占 了 (1/4) ， 学生 练习 时间 还有 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14632", "content": "如果 10 个 易拉罐 回收 后 可 制成 2 个 新 易拉罐 ， 那么 上 一个月 中 某 学校 一共 收集 了 2800 个 废 易拉罐 ， 这些 废 易拉罐 经 回收 加工 可 制成 多少 个 新 易拉罐 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21188", "content": "6 • 一 儿童节 学校 开 联欢会 ， 买 了 水果糖 16 千克 ， 相当于 奶糖 的 (2/3) ， 学校 共 买 两种 糖果 多少 千克 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11829", "content": "从 县城 架 一条 电线 到 胜利村 ， 长 7200 米 ． 架 了 3 天 以后 ， 离 胜利村 还有 2400 米 ， 平均 每天 架 了 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18034", "content": "养禽 厂 养 的 鸡 有 2400 只 ， 养 的 鸭 是 鸡 的 (2/3) ， 养 的 鸡鸭 一共 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9655", "content": "陆 师傅 准备 种 120 棵 果树 ， 桃 树种 了 总 棵 数 (1/6) 后 ， 还 比 梨树 少 10 棵 ． 需要 种 的 梨树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19433", "content": "一 件 商品 进价 80 元 ， 如果 要 获得 50% 的 利润 ， 售价 应 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17267", "content": "三年级 同学 去 果园 劳动 ， 男同学 有 75 人 ， 女同学 有 69 人 ． 8 个 同学 分成 一组 ， 一共 分 了 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8707", "content": "果园 里 有 桃树 400 棵 ， 比 梨树 少 100 棵 ． 桃树 比 梨树 少 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6430", "content": "3 （ 1 ） 班 同学 分成 8 个 小组 做 纸花 ， 其中 7 个 小组 都 做 了 105 朵 ， 另 一个 小组 做 了 125 朵 ， 同学 们 一共 做 了 多少 朵 纸花 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11017", "content": "某 工厂 1985 年产值 175 万元 ， 比 原 计划 增产 25% ， 原 计划 产值 多少 万元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6630", "content": "工程队 修 一段 34.8 千米 的 公路 ， 原 计划 24 天 完成 ， 实际 20 天 就 完成 了 任务 ， 实际 每天 比 原 计划 每天 多 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6480", "content": "一 个数 的 4 倍 比 38.3 少 12.5 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22585", "content": "加工 一批 零件 ， 5 天 正好 完成 总数 的 (3/4) ， 每天 完成 总数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14968", "content": "小 磊 看 一 本书 ， 第一天 看 的 页数 比 总 页数 的 (3/8) 少 10 页 ， 第 二 天 看 了 70 页 ， 还 剩 全书 的 (1/4) 没有 看 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11357", "content": "团结村 修 一条 公路 ， 第一天 修 了 全长 的 (4/7) ， 第 二 天 修 了 余下 的 (3/5) ， 第 3 天 修 了 120 米 ， 此时 刚好 修 完 ， 问 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14088", "content": "某村 去年 种 西瓜 180 公顷 ， 今年 比 去年 多种 了 (1/4) ， 今年 比 去年 多种 西瓜 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4571", "content": "甲 、 乙 两列 火车 从 两站 同时 相向 开出 ， 甲 车 平均 每 小时 行 90 千米 ， 乙 车 每 小时 平均速度 是 甲 车 的 (5/6) ． 经过 2.5 小时 两车 在 途中 相遇 ． 两站 之间 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7467", "content": "计算 899998 + 89998 + 8998 + 898 + 88 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "16020", "content": "中山路 小学 有 男生 560 人 ， 女生 比 男生 少 (1/8) ， 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6399", "content": "98 与 65 的 差 ， 与 123 与 45 的 和 的 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14698", "content": "制衣厂 有 720 件 衣服 要 包装 ， 每箱 装 衣服 24 件 ， 最 多 能 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4597", "content": "一 块 正方形 的 铁皮 板 的 边长 是 50 厘米 ， 按照 需要 ， 要 把 它 分割 成 面积 比 为 3 ： 7 的 两 部分 ． 则 较大 一块 的 面积 = 多少 平方厘米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13748", "content": "6 - (1/3) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21205", "content": "张 叔叔 带 了 300 元 钱 ， 到 书店 先买 了 2 套 《 故事 大王 》 ， 每套 36 元 ， 再 用 剩下 的 钱 正好 买 了 3 套 《 科技 丛书 》 ， 每套 《 科技 丛书 》 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22327", "content": "在 100 位 外语 教师 中 ， 懂 英语 的 有 75 人 ， 懂 日语 的 有 45 人 ， 只 懂 英语 的 教师 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21616", "content": "同学 们 乘车 去 森林公园 ， 每辆车 可 乘坐 45 人 ， 前 3 辆车 全部 坐满 ， 第 4 辆车 还有 18 个 空位 ， 共有 多少 位 同学 到 森林公园 去 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "115", "content": "金 湖 水域 面积 420.08 平方千米 ， 陆地 面积 是 水域 面积 的 2.3 倍 ， 陆地 面积 比 水域 面积 多 多少 平方千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14496", "content": "叶 老师 打算 把 5000 元 存入 银行 （ 整存整取 2 年 ） ． 她 准备 到期 后 将 利息 取出 买 图书 充实 班级 “ 图书 角 ” ． 如果 按 年利率 2.79% 计算 ， 到期 时 叶 老师 可以 取出 多少 钱 买 图书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17261", "content": "学校 买 了 160 支 笔 ， 其中 有 40 支 铅笔 和 15 盒 钢笔 ， 每盒 钢笔 多少 支 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14129", "content": "教室 的 走廊 长 18 米 ， 如果 沿 一侧 每隔 3 米 放 一 盆花 （ 两端 也 要 放 ） ， 需要 多少 盆花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "242", "content": "红光 机械厂 去年 产值 250 万元 ， 今年 产值 计划 增加 到 300 万元 ， 今年 计划 产值 比 去年 增加 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12452", "content": "体育 用品商店 有 排球 180 个 ， 篮球 比 排球 的 4 倍 少 10 个 ， 商店 的 篮球 和 排球 一共 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7500", "content": "小 芳 家 有 一个 长 3 米 ， 宽 和 高 都 是 2 米 的 长方体 鱼池 ， 若 给 这个 鱼池 的 4 周 和 底面 贴 方砖 ， 则 贴 方砖 的 面积 = 多少 平方米 ．", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "21137", "content": "美术班 有 男生 20 人 ， 是 女生 的 (5/6) ， 女生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3698", "content": "一 个数 的 3.9 倍 与 它 的 2.5 倍 的 和 是 80 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17373", "content": "一 个 平行四边形 的 底 是 9 分 米 ， 面积 是 12.6 平方分米 ， 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4301", "content": "一 种 衣服 原价 每件 50 元 ， 现在 打 0.9 出售 ， 每件 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3968", "content": "10 位 小朋友 站 成 一列 做操 ， 每 相邻 两位 小朋友 相隔 2 米 ， 做操 的 队伍 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21870", "content": "李师傅 要 加工 一批 零件 ， 已经 完成 了 (1/3) ， 再 做 16 个 就 完成 总数 的 (2/5) ， 这 批 零件 共有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2004", "content": "商店 卖出 橘子 400 千克 ， 卖出 香蕉 6 筐 ， 每 筐 重 25 千克 ， 商店 一共 卖出 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10322", "content": "甲 、 乙 两个 修路 队 合 修 一条 公路 ． 第一天 甲队 修 了 68.5 米 ， 乙 队 修 的 是 甲队 的 1.4 倍 ， 照 此 速度 两队 合 修 5 天 ． 乙 队 一共 修路 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10576", "content": "工程队 要 筑 一条 长 7.4 千米 的 公路 ， 已经 筑 了 12 天 ， 平均 每天 筑 0.35 千米 ， 剩下 的 要 在 8 天 内 完成 ， 平均 每天 至少 要 筑 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2619", "content": "甲 是 18 ， 比 乙 多 36% ， 乙 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9423", "content": "小 明 3 分钟 行 210 米 ， 照 这样 计算 ， 他 10 分钟 能 行 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7972", "content": "计划 修 一条 路 ， 实际 修 了 500 米 ， 比 计划 的 (3/4) 多 修 87.5 米 ． 计划 修路 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22", "content": "在 一次 数学 竞赛 中共 有 20 道 题 ， 每 做 对 一 题 得 5 分 ， 做 错 或 不 做 扣 1 分 ， 小 华 得 了 70 分 ， 他 共 做 对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7165", "content": "小 明 准备 到 商场 买 一套 衣服 ， 上衣 标价 750 元 ， 打 0.85 出售 ； 被子 标价 180 元 ， 打 0.7 出售 ． 小 明 买 一套 衣服 要 付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5450", "content": "计算 ： （ 702471 - 702.471 ） / （ 234157 - 234.157 ） = ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3166", "content": "24 的 (1/6) 比 20 与 5 的 和 少 多少 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22679", "content": "王明 对 120 户 家庭 是否 拥有 电脑 的 情况 进行 了 调查 统计 ， 其中 有 电脑 的 家庭 占 35% ． 在 这些 家庭 中 ， 多少 户 有 电脑 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13884", "content": "a 、 b 两 港 之间 的 航道 长 1075 千米 ， 甲 、 乙 两艘 轮船 分别 从 两 港 相对 开出 ． 甲 船 每 小时 航行 26 千米 ， 乙 船 每 小时 航行 17 千米 ， 经过 多少 小时 两 船 相遇 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16373", "content": "蜂鸟 每分钟 飞行 (3/10) 千米 ， 5 分钟 飞行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "119", "content": "一 个 平行四边形 的 面积 是 4.5 平方米 ， 底边 上 的 高 是 1.5 米 ， 底 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11680", "content": "一 个 圆柱形 铁块 ， 底 面积 是 8 平方厘米 ， 高 是 3 厘米 ， 将 它 熔铸 成 底 面积 是 12 平方厘米 的 圆锥形 铁块 ， 高 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12407", "content": "新华 机床厂 要 加工 一批 机床 ， 原 计划 每天 加工 80 台 ， 12 天 完成 ， 由于 技术革新 ， 实际 每天 多 加工 40 台 ， 实际 用 多少 天 完成 了 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18029", "content": "小 亮 看 一本 文艺 书 ， 看 了 3 天 ， 还有 24 页 ， 以后 每天 看 6 页 ， 还要 看 多少 天 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7429", "content": "甲 、 乙 两个 仓库 存放 的 粮食 同样 多 ， 如果 从 甲 仓库 运 10 吨 粮食 到 乙 仓库 后 ， 甲 仓库 的 粮食 正好 比 乙 仓库 少 (1/3) ． 乙 仓库 现在 有 多少 吨 粮食 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14406", "content": "“ 6 一 ” 节 学校 为 学生 购买 礼品 ， 如果 每人 8 元 ， 共 需 4800 元 ． 实际 每人 用 了 10 元 ， 学校 实际 用 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16563", "content": "小 丽 的 妈妈 带 100 元 钱 去 买 东西 ， 买菜 用 去 38.75 元 ， 买 水果 用 去 26.35 元 ． 还 剩 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21567", "content": "一 篮子 大小 一样 的 苹果 ， 小 明 不 小心 弄掉 了 (2/3) 河里 去 了 ， 篮子 里 现在 只有 10 个 苹果 ， 原来 篮子 里 共有 多少 个 苹果 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2875", "content": "3 （ 一 ） 班 有 52 人 去 看 电影 ， 票价 每张 6 元 ， 买票 共 需要 多少 元 钱 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2261", "content": "周 林 学校 六年级 有 男生 146 人 ， 女生 94 人 ， 四年级 学生 人数 是 六年级 人数 的 (7/8) ， 四年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "213", "content": "一 辆 汽车 每 小时 行 67 千米 ， 小 华 家 到 省会 城市 的 路程 是 268 千米 ． 小 华 坐 汽车 到 省会 城市 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7018", "content": "运 一堆 土 ， 每天 运 180 车 需要 40 天运 完 ． 如果 要 15 天运 完 ， 每天 要 运 多少 车 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19283", "content": "火车 提速 后 平均 每 小时 行驶 112 千米 ， 小 军 7 小时 步行 28 千米 ． 火车 比 小 军 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3632", "content": "丽丽 家 的 书架上 有 科技 书 45 册 ， 相当于 文艺 书 的 (5/8) ， 文艺 书 的 册数 又 相当于 全部 图书 册数 的 (3/8) ， 丽丽 家 的 书架上 共有 多少 册 书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20305", "content": "停车场 大 汽车 是 小汽车 的 (3/4) ， 摩托车 是 小汽车 的 (4/5) ， 大 汽车 有 15 辆 ， 摩托车 有 多少 辆 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19419", "content": "一 个数 除以 35 ， 商 是 14 ， 并且 有 余数 ， 当 余数 最大 时 ， 这个 数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1875", "content": "学校 举行 跳绳 比赛 ， 小巧 3 分钟 跳 195 下 ， 小胖 5 分钟 跳 265 下 ， 小胖 每分钟 比 小巧 少 跳 多少 下 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18449", "content": "某 纺织厂 食堂 运 来 2 吨 煤 ， 上个星期 用 去 这些 煤 的 (2/5) ， 这个 星期 用 去 (1/2) 吨 ． 两个 星期一 共用 去 多少 吨 煤 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2674", "content": "一 张 彩色纸 ， 做 花 用 去 了 (3/6) ， 做 小旗 用 去 了 (1/6) ， 还 剩 这 张 纸 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6743", "content": "某村 挖 一条 水渠 ， 已经 挖 了 全长 的 (2/5) ， 正好 挖 1200 米 ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14693", "content": "一 个 生产 小组 ， 原 计划 5 月份 生产 32 台 机床 ， 实际 生产 40 台 ， 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4510", "content": "一 个 袋子 里 有 红 、 白 、 蓝 3 种颜色 的 球 各 10 个 ， 至少 拿出 多少 球 才能 保证 有 2 个 球 是 不同 色 的 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13862", "content": "公园 里 有 8 棵 松树 ， 40 棵 柳树 ， 杨树 的 棵 树 是 松树 和 柳树 总和 的 2 倍 ， 有 杨树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14900", "content": "饲养场 养鸭 280 只 ， 养 的 鸭 比 鸡 多 (1/6) ， 饲养场 养鸡 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17237", "content": "把 900 平均 分成 20 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "840", "content": "小 红 看 一本 110 页 的 故事书 ， 前 3 天 每天 看 14 页 ， 剩下 的 每天 看 17 页 ， 还要 几天 才能 看 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20432", "content": "丁丁 读 一 本书 ， 已经 读 了 (2/7) ， 再 读 54 页 就 读完 了 全书 的 80% ． 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "912", "content": "食堂 运来了 980 千克 大米 ， 吃 了 12 天 ， 平均 每天 吃 35 千克 ， 还 剩 多少 千克 大米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13025", "content": "一 辆 旅游车 在 平原 和 山区 各 行驶 了 3 小时 ， 最后 到达 山顶 ． 在 平原 上 的 速度 是 50 千米 / 小时 ． 在 山区 上 的 速度 是 30 千米 / 小时 ． 这 段 路程 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5109", "content": "吴 敏 每天 早上 跑步 17 分钟 ， 她 的 速度 大约 是 120 米 / 分 ， 她 每天 大约 跑步 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10476", "content": "甲 、 乙 、 丙 3 人 进行 100 米 短跑 赛 ． 甲 到 终点 时 ， 乙 跑 了 80 米 ， 丙 离 终点 30 米 ． 那么 ， 当 乙 到 终点 时 ， 丙 离 终点 还有 多 远 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "55", "content": "甲 、 乙 两个 工程队 共同 开凿 一条 隧道 ． 15 天 共 开凿 了 2070 米 ， 甲队 每天 开凿 65 米 ， 乙 队 每天 开凿 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "682", "content": "把 600 平均 分成 30 份 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20155", "content": "1 千克 的 (3/5) 和 多少 千克 的 (1/5) 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5790", "content": "解放军 战士 参加 清理 河道 劳动 ， 前 2 天 共 清除 河泥 25.3 吨 ， 后 3 天 共 清除 河泥 36.5 吨 ， 平均 每天 清除 河泥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13378", "content": "阜新 • 沈阳 两地 相距 180 千米 ， 一辆 汽车 从 阜新 出发 行驶 了 全程 的 (5/9) ， 还要 行驶 多少 千米 到达 沈阳 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8369", "content": "学校 运 来 138 台 电脑 ， 分 到 3 个 电脑室 放 ， 平均 每个 电脑室 放 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9732", "content": "爸爸 为 小 明 买 了 一台 学习机 188 元 ， 爸爸 付 了 200 元 ． 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6538", "content": "(14/15) + (4/5) 与 (7/16) 的 和 ， 再 去除 (3/4) ， 得数 = ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19955", "content": "一 辆 汽车 从 城东 开往 城西 ， 前 3 小时 每 小时 行 41 千米 ， 后 4 小时 共 行 220 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7575", "content": "三年级 有 男生 32 人 ， 女生 28 人 ， 如果 每人 发 5 本 作业本 ， 学校 要 准备 多少 个 作业本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2682", "content": "张 浩然 看 一本 科普 书 ， 已经 看 了 42 页 ， 已经 看 的 与 没 看 的 页数 比 是 3 ： 7 ． 这本 科普 书 一共 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3402", "content": "小 明 调查 班上 50 名 同学 最 喜欢 看 的 奥运 球类 比赛 情况 ， 喜欢 看 乒乓球 的 同学 占 全班 的 (2/5) ， 比 喜欢 羽毛球 的 人数 多 (1/3) ， 班上 有 多少 人 喜欢 看 羽毛球 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2355", "content": "儿童乐园 的 碰碰车 项目 ， 原来 每次 收费 12 元 ， 元旦 那天 调整 了 价格 ， 降低 了 (1/5) ， 这样 玩 一次 碰碰车 ， 可以 比 原来 少付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20394", "content": "李 明 在 杂志 上 发表 了 一篇 文章 ， 得到 稿费 500 元 ． 按 3% 的 税率 缴税 后 ， 李 明 还 剩 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13182", "content": "小 明 和 妈妈 逛商店 ， 买 了 一件 衣服 用 了 134 元 ， 又 买 了 一个 书包 用 了 108 元 ， 共用 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21932", "content": "某 工厂 要 加工 360 个 零件 ， 2 小时 加工 了 这 批 零件 的 (1/4) ， 照 这样 计算 ， 加工 完 这 批 零件 共 要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14186", "content": "甲乙 两筐 苹果 各 24 千克 ， 从 甲 筐 取出 4 千克 放入 乙 筐 ， 这时 乙 筐 里 的 苹果 比 甲 筐 多 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16670", "content": "一 袋 米 重 80 千克 ， 第一次 用 去 它 的 (3/8) ， 第 二 次 用 去 余下 的 (2/5) ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "1856", "content": "两个 数 的 积 是 45.6 ， 一个 因数 扩大 100 倍 ， 另 一个 因数 缩小 到 原来 的 (1/10) ， 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20635", "content": "某 数 加上 2 ， 减去 3 ， 乘以 4 ， 除以 5 ， 等于 24 ． 求 某 数 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8977", "content": "甲乙 两组 原来 人数 相等 ， 甲组 招工 24 人 ， 乙组 退休 14 人 后 ， 甲组 人数 比 乙组 人数 多 (19/6) ． 原来 两组 各 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8768", "content": "重庆市 共有 40 个 辖区 ， 其中 有 17 个 县 ， 其余 都 是 市辖区 ． 市辖区 的 个数 占 辖区 总数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15253", "content": "王 叔叔 从 县城 出发 去 送 化肥 ， 去 的 时候 用 了 3 小时 ， 每 小时 行驶 40 千米 ， 返回 时 用 了 2 小时 ， 返回 时 每 小时 行 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9583", "content": "一 种 化工原料 ， 原来 每吨 生产成本 是 1250 元 ， 现在 成本 降低 了 20% ． 现在 每吨 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2354", "content": "某 汽车 销售 公司 去年 下半年 卖出 威 姿 轿车 165 量 ， 比 别克 轿车 少 55 辆 ． 这 两种 轿车 一共 卖出 多少 辆 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19623", "content": "一 个数 比 94 的 40 倍 少 150 ， 这个 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18647", "content": "一 根 木头 长 8 米 ， 工人 师傅 要 把 它 平均 分成 5 段 ． 每 锯下 一段 需要 6 分钟 ， 锯 完 一共 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3153", "content": "某校 美术组 有 40 人 ， 美术组 人数 是 音乐 组 人数 的 (2/3) ， 音乐 组 人数 又 是 数学组 人数 的 (3/4) ． 数学组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7115", "content": "修 一条 路 ， 已修 了 15 千米 ， 没有 修 的 比 已修 的 2 倍 少 5 千米 ． 还有 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16155", "content": "养殖场 里 有 85 只 鸭 ， 1445 只 鸡 ． 鸡 的 只 数 是 鸭 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8415", "content": "植物 小组 在 学校 植物园 里 播下 了 80 粒 向日葵 种子 ， 种子 的 发芽率 是 95% ， 发芽 的 向日葵 种子 有 多少 粒 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6984", "content": "计算 420 / （ 52 - 45 ） 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 结果 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21448", "content": "小 红 看 一本 故事书 ， 已经 看 了 35 页 ， 正好 是 这本 故事书 的 (5/7) ， 这本 故事书 共有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1555", "content": "修 一条 路 ， 12 天 修 完全 长 的 40% ， 照 这样 计算 ， 余下 的 需 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9362", "content": "少年宫 的 展厅 里 有 2 根 圆柱 ， 每 根 圆柱 的 高 4 米 ， 底面 周长 是 3.14 米 ． 现在 要 把 这 两根 柱子 油漆 一遍 ， 平均 每平方米 用 漆 0.5 千克 ， 至少 要 油漆 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "4756", "content": "筑路 队 ， 修 一段路 ， 6 个人 45 天 完成 ， 如果 增加 9 人 ， 多少 天 完成 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21352", "content": "一 种 童鞋 ， 加价 15% 后 的 定价 是 46 元 ， 这种 童鞋 的 进价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6950", "content": "饲养场 养 了 257 只 公鸡 ， 268 只 母鸡 ， 平均 放在 35 个 笼子 里 ． 每个 笼子 有 多少 只 鸡 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2870", "content": "一 桶 油 装满 后 连 桶 重 150 kg ， 用 去 (2/5) 后 ， 这 桶 油 连 桶 还 重 92 kg ， 这 只 油桶 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "330", "content": "有 58 辆 彩车 排成一列 ， 每辆 彩车 长 4 米 ， 彩车 之间 相隔 5 米 ， 这 列 彩 车队 共 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "6902", "content": "一 箱 雪糕 40 根 ， 陈 阿姨 3 天 卖完 了 6 箱 ， 她 平均 每天 卖 多少 根 雪糕 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23003", "content": "8 个 桃子 换 4 个 苹果 ， 1 个 梨 换 3 个 苹果 ， 一个 梨 换 多少 个 桃子 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4395", "content": "王 叔叔 中 得 大奖 ， 缴纳 20% 的 个人所得税 ； 12 万元 资助 希望工程 ； 还 剩 20 万元 是 孩子 的 教育 储备金 ． 王 叔叔 中 得 大奖 到底 = 多少 钱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1889", "content": "2.7 与 1.8 的 积 加上 0.76 与 0.4 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12106", "content": "李 阿姨 付出 100 元 购买 了 5 千克 鸡蛋 和 一袋 大米 ， 找回 22.8 元 ， 已知 大米 每 袋 48 元 ， 每千克 鸡蛋 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4730", "content": "200 千克 大米 增加 10% 后 重 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17443", "content": "[ (5/6) - ( (1/4) + (1/6) ) ] / (3/4) = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1597", "content": "甲乙 两队 学生 从 相距 2700 米 的 两地 同时 出发 ， 相向 而 行 ， 一个 同学 骑 自行车 以 每 分 150 米 的 速度 在 两队 间 不停 地 往返 联络 ， 甲队 每 分行 25 米 ， 乙 队 每 分行 20 米 ， 两队 相遇 时 ， 骑 自行车 的 同学 共 行 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9696", "content": "食堂 运 来 大米 480 千克 ， 相当于 运 来 面粉 的 3.2 倍 ， 运 来 面粉 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15490", "content": "明明 看 一本 故事书 ， 共有 96 页 ， 前 3 天 看 了 24 页 ， 照 这样 计算 ， 还要 几天 才能 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14899", "content": "水果 批发 站 运来了 650 千克 的 砂糖 橘 ， 第一天 批发 出 223 千克 ， 第 二 天 批发 出 198 千克 ， 两天 一共 批发 出 多少 千克 的 砂糖 橘 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14561", "content": "小 红 读 一本 故事书 ， 第一天 读 了 这 本书 的 (1/3) ， 第 二 天 读 了 45 页 ， 还 剩下 15 页 没有 读 ． 这 本书 一共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13444", "content": "果 林场 今年 共 收 苹果 42000 千克 ， 比 去年 增产 5% ， 去年 收 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1844", "content": "游泳池 里 有 45 位 同学 在 游泳 ， 其中 (5/9) 是 男同学 ． 男同学 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2915", "content": "买 3 千克 桔子 和 4 千克 苹果 共用 28.6 元 ， 已知 每千克 桔子 的 售价 是 3.2 元 ， 每千克 苹果 的 售价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17253", "content": "商店 有 一种 衣服 ， 售价 340 元 ， 比 原来 定价 便宜 15% ， 原来 定价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17262", "content": "一 件 上衣 打 0.8 后 售价 240 元 ， 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18594", "content": "一 根 绳子 长 24 米 ， 第一次 剪 去 (5/8) ， 第 二 次 剪 去 的 是 第一次 的 (2/5) ． 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15794", "content": "某人 (1/8) 小时 步行 了 (3/4) 千米 ， 步行 一 千米 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3849", "content": "一 根 绳子 长 24 米 ， 每 4 米 做 一根 跳绳 ， 可以 做 多少 根 跳绳 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5056", "content": "有 14 箱 故事书 和 36 箱 科技 书 ， 每箱 装 的 书 都 是 20 本 ． 一共 有 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4359", "content": "水果店 运进 梨 300 千克 ， 比 运进 的 苹果 少 20% ， 水果店 运进 的 苹果 = 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5276", "content": "黑 兔 50 只 ， 白兔 40 只 ， 黑 兔 比 白兔 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12028", "content": "动物园 有 13 只 大熊猫 ， 有 31 只 老虎 ， 16 只 孔雀 ， 老虎 比 孔雀 多 多少 只 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9054", "content": "小 聪 和 小 明 从 学校 到 相距 2400 米 的 电影院 去 看 电影 ． 小 聪 每分钟 行 60 米 ， 他 出发 后 10 分钟 小 明 才 出发 ， 结果 俩 人 同时 到达 影院 ， 小 明 每分钟 行 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15806", "content": "小 莉 看 一本 120 页 的 故事书 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 全书 的 (1/5) ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21834", "content": "一 辆 普通 自行车 的 售价 是 386 元 ， 相当于 一辆 摩托车 售价 的 (2/15) ， 求 这辆 摩托车 的 售价 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11539", "content": "现有 浓度 为 20% 的 糖水 200 克 ， 要 得到 浓度 为 16% 的 糖水 ， 需 加水 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3911", "content": "甲乙 两地 相距 270 千米 ， a 、 b 两辆车 同时 从 甲 、 乙 两地 相对 开出 ， 甲 车 每 小时 行 42 千米 ， 乙 车 每 小时 行 48 千米 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7073", "content": "某 钢铁厂 3 月份 用电 480 千瓦时 ， 比 二 月份 节约 了 25% ． 节约 了 多少 千瓦时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19760", "content": "一 个 车 式 计划 做 224 个 零件 ， 做 了 8 小时 后 ， 还 剩下 80 个 未 做 ． 这个 车工 平均 每 小时 做 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10563", "content": "一 台 音响 ， 由于 改进 了 功能 ， 每 台 提价 40% ， 现在 售价 是 7350 元 ， 这 台 音箱 原价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4601", "content": "一 瓶 药 有 42 片 张 英 每天 吃 3 次 ， 每次 吃 2 片 ． 这 瓶 药 够吃 几天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21748", "content": "农场 有 一块 实验 地 ， 共 50 亩 ， 其中 (6/25) 种 花生 ， 其余 种植 棉花 ， 问 种植 棉花 多少 亩 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10452", "content": "用 汽车 运 一批 水泥 ， 第一次 运 了 168 吨 ， 占 水泥 总数 的 (4/5) ， 第 二 次 运 的 是 第一次 的 (1/4) ， 正好 运 完 ． 这 批 水泥 有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15564", "content": "建造 一幢 教学大楼 ， 实际 投资 120 万元 ， 比 计划 投资 节省 (1/5) ， 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5414", "content": "一 个 玩具厂 计划 生产 5.2 万辆 电动汽车 ， 已经 生产 了 8 天 ， 每天 生产 0.35 万辆 ， 余下 的 要求 在 4 天 内 完成 ． 平均 每天 应 生产 多少 万辆 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8846", "content": "有 浓度 为 2.5% 的 盐水 700 克 ， 为了 制成 浓度 为 3.5% 的 盐水 ， 从中 要 蒸发掉 多少 克 水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17079", "content": "运送 一批 货 ， 第一天 运 了 总数 的 (1/3) ， 第 二 天运 了 9 吨 ， 这时 已 运 的 与 剩下 的 吨数 比 是 7 ： 5 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15968", "content": "兴趣小组 有 女生 10 人 ， 男生 12 人 ， 还要 录取 女生 多少 人才 能 使 女生 占 舞蹈队 总 人数 的 (3/5) ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10701", "content": "小 华 与 小 丽 同时 从 东西 两 村 出发 ， 背向 而 行 ， 小 华 每 分 走 80 米 ， 小 丽 每 分 走 70 米 ， 经过 12 分钟 ， 两 人 相距 3000 米 ， 东西 两 村 相距 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17415", "content": "从 (5/6) 里面 连续 减去 多少 个 (1/12) ， 差 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21837", "content": "工程队 要 架 一条 长 4500 米 的 电话线 ， 计划 36 天 完成 ． 实际 每天 比 计划 多架 25 米 ， 实际 用 多少 天 架完 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21231", "content": "客车 和 货车 同时 从 两地 相对 出发 ， 5 小时 相遇 ， 货车 每 小时 行 50 千米 ， 客车 每 小时 行 65 千米 ， 两地 间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18013", "content": "光华路 小学 图书室 有 图书 4200 册 ， 借给 同学 们 32% 后 ， 图书室 还 剩 图书 多少 册 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5015", "content": "一 件 衣服 降 了 80 元 ， 比 原价 降 了 (1/6) ． 这件 衣服 的 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6795", "content": "学校 图书室 有 连环画 450 本 ． 故事书 的 本 数 是 连环画 的 (4/5) ， 又 是 科技 书 的 (1/5) ， 图书室 有 科技 书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8878", "content": "篮球 每个 68 元 ， 比 每个 排球 多 18 元 ， 学校 买 了 3 个 篮球 和 5 个 排球 ， 一共 要 用 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "14318", "content": "马戏团 准备 了 3 顶 不同 的 帽子 ， 4 件 不同 样式 的 大衣 ， 马戏团 最 多 可以 表演 出 多少 种 不同 的 装束 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16203", "content": "一 个数 的 3 倍 / 3.75 与 2.5 的 和 ， 商 是 0.3 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12471", "content": "一 桶 油 第一次 倒 出 总量 的 (1/4) ， 第 二 次 倒 出 总量 的 20% ， 还 剩 22 千克 ， 这 桶 油 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22176", "content": "五年级 人数 是 6 年 人数 的 (1/3) ， 六年级 人数 是 全校 人数 的 (1/6) ， 如果 全校 有 学生 864 人 ， 五年级 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8399", "content": "一 个 股民 以 每股 10.5 元 买进 某 股票 2000 股 后 ， 又 以 每股 13.75 元 全部 卖出 ． 此 过程 中 无论是 买进 还是 卖出 他 均 需 缴纳 交易额 为 0.3% 作为 手续费 ， 这位 股民 买卖 这种 股票 赚 了 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "698", "content": "东南 汽车厂 要 装 3000 辆 小汽车 ， 已经 装 了 750 辆 ， 剩下 要 在 9 天 装完 ， 平均 每天 安装 多少 辆 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19251", "content": "食堂 两天 用 完 一袋 大米 ， 第一天 用 了 全部 的 30% ， 第 二 比 第一天 多用 40 千克 ， 求 这 袋 大米 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6539", "content": "买 一辆 汽车 ， 分期付款 购买 要 多 加价 7% ， 如果 现金 购买 可 按 0.95 优惠 ． 小 新 算 完 后 发现 分期付款 比 现金 购买 多付 7200 元 ， 那么 这辆 汽车 的 原价 = 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6537", "content": "一 只 虎 体重 180 千克 ， 一只 熊 的 体重 是 虎 的 2 倍 ， 这 只 熊 的 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15049", "content": "六年级 有 学生 240 人 ， 正好 是 全校学生 人数 的 (1/5) ， 五年级 人数 占 全校 人数 的 (1/4) ， 五年级 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14317", "content": "李老师 看 一 本书 ， 第一周 看 了 这 本书 的 (2/13) ， 第 二 周 看 了 这 本书 的 (7/13) ， 还 剩下 这 本书 的 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14462", "content": "一 个数 的 3 倍 是 1101 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9170", "content": "一 辆 自行车 车轮 的 外 直径 是 0.6 米 ， 如果 它 每分钟 转 200 圈 ， 通过 一座 长 753.6 米 的 桥 ， 需要 多少 分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20937", "content": "小 红 看 一 本书 ， 已经 看 了 55 页 ， 正好 是 这 本书 的 (5/9) ， 这 本书 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17542", "content": "果园 里 有 苹果树 200 棵 ， 梨树 棵 数 比 苹果 数多 20% ， 梨树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14487", "content": "按 规律 填 数 (3/4) ， 1 ， (4/3) ， (16/9) ， 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "789", "content": "一 个 小组 8 位 同学 的 体重 分别 是 38 千克 、 39 千克 、 38.5 千克 、 36.5 千克 、 36 千克 、 37 千克 、 35.5 千克 、 39.5 千克 ． 这个 小组 同学 的 平均 体重 = 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "12561", "content": "有 9 升 酒精 ， 要 用 同样 大小 的 瓶子 来 装 ， 已知 6 个 瓶子 可 装 1.5 升 ， 要 分装 完 所有 的 酒精 ， 需要 这样 的 瓶子 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13990", "content": "一 本 故事书 240 页 ， 小 华 第一天 看 了 全书 的 27% ， 第 二 天 看 了 全书 的 23% ， 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3150", "content": "学校 图书馆 去年 有 320 本 科技 书 ， 今年 又 买来 一些 ， 今年 共有 400 本 ， 今年 的 科技 书 比 去年 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4636", "content": "两列 火车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 5 小时 后 相遇 ． 甲 车 每 小时 行 110 千米 ， 乙 车 每 小时 行 100 千米 ． 甲 、 乙 两地 间 的 路程 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1780", "content": "有 两个 养鸡场 ， 甲 鸡场 有 (2/5) 是 公鸡 ， 其余 都 是 母鸡 ， 总 只 数 比 乙 养鸡场 多 150 只 ， 乙 养鸡场 的 全部 是 公鸡 ， 两个 养鸡场 中 的 公鸡 只 数 共 690 只 ． 甲 养鸡场 养 母鸡 多少 只 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8669", "content": "甲乙 两车 同时 从 相距 540 千米 的 a 、 b 地 相对 开出 ， 5 小时 后 甲 车行 了 全程 的 (3/4) ， 乙 车行 了 全程 的 (2/3) ， 这时 两车 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9055", "content": "一 本 故事书 原价 8.60 元 ， 某班 添置 这本 故事书 51 本 ， 共 382.5 元 ， 每 本 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11005", "content": "当阳市 图书馆 给 学校 送来 一批 图书 分给 几个 班 ， 如果 每班 分 10 本 ， 则 余 40 本 ， 如果 每班 分 13 本 ， 则 不足 8 本 ， 一共 分给 几个 班级 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20016", "content": "少年宫 气象 小组 有 20 人 ， 美术 小组 比 气象 小组 多 6 人 ， 生物 小组 的 人数 是 美术 小组 的 2 倍 ． 生物 小组 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18016", "content": "小 华 在 菜场 买 了 8.5 千克 豆角 ， 付给 售货员 13 元 后 ， 找回 0.25 元 ． 每千克 豆角 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8775", "content": "王老师 从 家 骑车到 学校 ， 以 每 小时 15 千米 的 速度 要 用 0.25 小时 ， 如果 改为 步行 ， 每 小时 走 5 千米 ， 要 用 多少 小时 走 到 学校 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13955", "content": "做 早操 时 ， 小朋友 排成一列 ， 从前 数 小 王 排 第 4 ， 从 后 数 小 青 排 第 5 ， 已知 小 王 排 在 小 青 的 前面 ， 这 一列 同学 共有 多少 人 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8162", "content": "一 本 童话故事 书 共有 180 页 ， 小 红 前 4 天 看 了 60 页 ． 照 这样 计算 ， 这 本书 一共 需要 多少 天 看 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11142", "content": "园林 工人 分成 5 个 小组 ， 每个 小组 有 9 人 ， 要 完成 990 棵 树苗 的 植树 任务 ， 平均 每人 植 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18422", "content": "一 辆 摩托车 现价 2400 元 ， 比 原价 降低 了 (1/7) ， 摩托车 的 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "96", "content": "一 辆 公共汽车 上 有 6 个 空座位 ． 车 开 到 团结 站 ， 没有 人 下车 ， 但 上来 了 9 人 ， 空座位 还有 2 个 ， 上车 的 人 中 有 多少 人 站 着 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12247", "content": "商店 售出 3 筐 桔子 ， 每 筐 40 千克 ， 占 售出 水果 总数 的 (1/3) ． 售出 的 梨 占 售出 水果 总数 的 (5/9) ， 商店 售出 多少 千克 梨 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "34", "content": "王 大伯 卖出 两桶 单价 相同 的 苹果 ， 一桶 是 18 千克 ， 另 一桶 是 24 千克 ； 两桶 苹果 所 卖 的 钱 相差 10.8 元 ． 平均 每千克 苹果 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1904", "content": "王老师 读 一 本书 ， 每天 看 148 页 ， 第 6 天 他 应该 从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14607", "content": "每 台 复读机 的 价钱 是 238 元 ， 买 18 台 复读机 需要 多少 元 钱 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23010", "content": "小齿轮 有 28 个 齿 ， 是 大 齿轮 数 的 (1/5) ， 大 齿轮 有 多少 个 齿 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17218", "content": "一 个 苗圃 里 栽 了 松树 、 柏树 和 杉树 3 种 树苗 ， 其中 松树 苗 占 (3/10) ， 柏树 苗 占 (1/6) ， 杉 树苗 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13433", "content": "修路 队 要 修 一条 长 875 米 的 公路 ， 第一天 修 了 220 米 ， 第 二 天 修 了 297 米 ． 还 剩 多少 米 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20375", "content": "英语 竞赛 规定 10 道 题 ， 做 对 一 题 得 7 分 ， 做 错 一道 倒扣 4 分 ， 小 宇 得 了 48 分 ， 他 答对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15577", "content": "多少 的 倒数 是 0.1 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14401", "content": "爱神 爱 罗斯 采 来 一批 仙果 ， 其中 攸 忒 皮 拿走 (1/12) ， 克里奥 拿走 (1/5) ， 退 里 亚 禽 走 (1/8) ， 麦 蓬 麦 尼 拿走 (1/20) ， 忒 普 息 科里 拿走 (1/4) ， 尼 拉托 拿走 (1/7) ， 坡 力 欣 尼亚 拿走 30 个 ， 攸 果 尼亚 拿走 120 个 ， 卡 来 奥 皮 拿走 300 个 ， 最后 还 剩下 50 个 仙果 ． 问 这 批 仙果 原来 有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.9, "length": 21}
-{"question_id": "14509", "content": "花生 的 出油率 是 45% ， 要 榨出 450 千克 的 花生油 ， 需要 多少 千克 花生 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "534", "content": "小 美 家 到 学校 的 路程 是 0.6 千米 ， 小 丽 家 到 学校 的 路程 比 小 美 家 的 3 倍 少 0.3 千米 ． 小 丽 家 到 学校 的 路程 = 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5359", "content": "六年级 一班 红领巾 图书馆 有 科技 书 80 本 ， 文艺 书 120 本 ， 文艺 书 的 本 数 占 科技 书 和 文艺 书 总数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22709", "content": "商店 运 来 一些 水果 ， 梨 的 筐 数 是 25 筐 ， 苹果 的 筐 数 是 15 筐 ， 运 来 苹果 的 筐 数 是 梨 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2105", "content": "妈妈 买 了 5 条 毛巾 ， 每 条 8.5 元 ． 她 付给 售货员 100 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13626", "content": "工程队 修 一条 路 ， 已修 了 1800 米 ， 剩下 的 比 已修 的 3 倍 多 16 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5013", "content": "一 批 果树 的 成活率 是 90% ， 要 成活 180 棵 ， 至少 要 栽种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13270", "content": "某种 消毒液 按 水 与 消毒药 5 ： 1 的 比例 配制 而 成 ， 要 配制 这样 的 消毒液 2400 克 ， 需要 消毒药 多少 克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14193", "content": "学校 举行 夏季 运动会 ， 买来 28 箱 果汁 ， 每箱 有 24 瓶 ， 每瓶 的 价格 是 3 元 ． 一共 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2302", "content": "一 堆 黄沙 30 吨 ， 甲 车 每次 能 运 它 的 (1/6) ， 乙 车 每次 能 运 它 的 (1/5) ， 两车 每次 能 运 它 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21146", "content": "一 个 盒子 里 装有 1 个 红球 ， 2 个 白 球 ， 3 个 黑 球 ， 摸 到 白 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19156", "content": "3 名 学生 给 小树苗 浇水 ， 小 明 浇 了 24 棵 ， 是 小 华 浇 的 棵 数 的 2 倍 ， 小 英 比 小花 浇 的 3 倍 少 10 棵 ， 小 英 浇 了 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1257", "content": "甲乙 两 人 比赛 爬楼梯 ， 甲 的 速度 是 乙 的 2 倍 ， 当 甲 跑 到 9 层 时 ， 乙 跑 到 了 几层 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21586", "content": "一 桶 油 6 千克 ， 用 去 40% ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22097", "content": "食堂 买来 大米 280 袋 ， 吃 了 235 袋 ， 又 买来 218 袋 ． 现在 食堂 有 大米 多少 袋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16481", "content": "甲 乙丙 3 个 同学 参加 储蓄 ， 甲 存款 是 乙 的 (4/5) ， 丙 存款 比 乙 少 40% ， 已知 甲存 了 500 元 ， 丙 存 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6209", "content": "一 辆 货车 从 甲 城 开往 乙 城 ， 每 小时 行 50 千米 ， 行驶 了 12 小时 ； 返回 时 速度 提高 了 ， 用 了 10 小时 ． 货车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15228", "content": "一 列 火车 长 700 米 ， 以 每分钟 400 米 的 速度 通过 一座 长 900 米 的 大桥 ． 从 车 头上 桥 到 车尾 离 要 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7798", "content": "爱国 小学 图书馆 有 科技 书 3600 本 ， 故事书 比 科技 书 少 15% ． 有 故事书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3037", "content": "实验 小学 今年 有 计算机 121 台 ， 比 去年 增加 了 66 台 ， 今年 计算机 的 台数 比 去年 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "678", "content": "5 只 燕子 7 天 吃 害虫 2275 只 ， 平均 每 只 燕子 每天 吃 多少 只 害虫 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14577", "content": "一 段 高速公路 长 486 千米 ， 一辆 客车 4.5 小时 可行 完全 程 ， 一辆 货车 5.4 小时 可行 完全 程 ， 货车 的 速度 比 客车 的 速度慢 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13527", "content": "修 一条 水渠 ， 计划 每天 修 300 米 ， 40 天 完成 ． 实际上 2 天 就 修 了 800 米 ， 照 这样 计算 ， 可以 提前 多少 天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8049", "content": "两个 加数 都 是 46 ， 和 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21225", "content": "东东 要 做 315 道口 算题 ， 已经 做 了 4 天 ， 还 剩 115 道 没有 做 ， 东东 平均 每天 做 多少 道口 算题 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22502", "content": "比 42 多 30 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1478", "content": "修 一条 全长 12 km 的 公路 ， 开工 前 3 天 修 了 0.72 km ， 照 这样 计算 ， 修 完 这 条 路 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18390", "content": "池塘 里 有 4 只 鹅 ， 正好 是 鸭 的 只 数 的 (1/3) ． 池塘 里 有 多少 只 鸭 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16917", "content": "王老师 打 一份 稿件 ， 已经 打 了 25000 字 ， 还 剩下 总数 的 (3/4) ， 还 剩下 多少 字 没有 打 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8600", "content": "400 + 23 * 29 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3941", "content": "一 个数 比 40 的 30% 多 1.2 ， 求 这个 数 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13372", "content": "王师傅 每 小时 做 70 个 零件 ， 李师傅 每 小时 做 50 个 零件 ， 两 人 同时 开工 合 做 840 个 零件 ， 经过 几小时 可 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5611", "content": "甲 仓 的 大米 比 乙 仓 少 (1/4) ， 乙 仓 的 大米 比 甲 仓 多 (3/4) 吨 ， 乙 仓 有 多少 吨 大米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9548", "content": "学校 买来 篮球 和 排球 各 23 个 ， 篮球 每个 76 元 ， 排球 每个 24 元 ， 学校 买 篮球 和 排球 一共 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6246", "content": "在 长 7 分 米 ， 宽 4 分 米 的 长方形 中 ， 一共 可以 摆 多少 个 边长 1 分 米 的 小 正方形 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3502", "content": "学校 二 月份 付 水费 是 2000 元 ， 比 一月份 节约 500 元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10170", "content": "水 结成 冰 ， 体积 增加 (1/10) ． 现在 有 一块 冰 ， 体积 是 22 立方分米 ， 融化 后 的 体积 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2726", "content": "一 个 长方体 的 底 面积 是 12 平方厘米 ， 体积 是 36 立方厘米 ， 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12171", "content": "一 个 圆柱体 ， 它 的 底面 半径 是 2 厘米 ， 高 是 5 厘米 ， 它 的 体积 = ．", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "1614", "content": "甲 数 的 (1/4) 与 乙 数 的 20% 相等 ， 乙 数 是 100 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "325", "content": "310 - 256 与 8 的 商 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7469", "content": "青椒 每千克 1.56 元 ， 买 34 干 克 ， 应付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6220", "content": "一 个 长方形 的 宽 是 3 厘米 ， 长 是 宽 的 2 倍 ， 它 的 周长 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2347", "content": "手表 厂 原 计划 25 天 生产 1000 只 手表 ， 实际 比 计划 提前 5 天 完成 任务 ， 实际 每天 生产 多少 只 手表 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7573", "content": "旧 车床 18 小时 生产 90 个 零件 ， 新 车床 3 小时 生产 315 个 零件 ． 新 车床 单位 时间 内 生产 的 零件 是 旧 车床 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9101", "content": "1 千米 的 (2/3) 和 多少 千米 的 (1/3) 一样 长 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "990", "content": "小 明 体重 40 千克 ， 相当于 小 军 的 (10/9) ， 小 华 的 体重 是 小 军 的 (5/6) ． 小 华 体重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15137", "content": "20 - 11.2 与 4.54 的 和 所得 的 差 除以 4.26 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20060", "content": "小 高 读 一 本书 ， 第一天 读 了 全书 的 (11/15) ， 还 剩 这 本书 的 几分 之 几 没 读 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10693", "content": "工程队 修 一条 路 ， 第一周 修 了 全长 的 (1/4) ， 第 二 周 比 第一周 多 300 米 ， 还 剩下 340 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "998", "content": "利民 粮店 运 来 一批 大米 ， 卖出 37.5% ， 剩下 75 吨 ， 这 批 大米 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10240", "content": "某班 今天 缺席 2 人 ， 出勤率 是 96% ， 这个 班 今天 有 多少 人 上学 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8989", "content": "武昌 江边 将 竖立 华中地区 的 新 地标 - - 世界 第 3 高楼 ： 武汉 绿地 中心 ， 该楼 高 606 米 ， 比 世界 第一 高楼 迪拜 塔 低 (97/400) ， 世界 第一 高楼 迪拜 塔高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11193", "content": "一 个 长方体 游泳池 长 15 米 ， 宽 8 米 ， 深 2 米 ， 要 给 它 的 4 周 和 底面 贴 上 瓷砖 ， 贴 瓷砖 的 面积 有 多 大 ？", "knowledge": ["*", "+"], "difficulty": 0.6, "length": 15}
-{"question_id": "3032", "content": "一 种 服装 原价 180 元 ， 现在 降价 20% ． 现在 的 售价 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "489", "content": "小 平 在 踢毽 比赛 中 踢 了 42 下 ， 她 踢毽 的 数量 是 小 云 的 (3/4) ． 小 云 踢 了 多少 下 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3650", "content": "甲 数 是 120 ， 乙 数 比 甲 数 的 3 倍 少 20 ， 乙 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4815", "content": "学校 跑道 长 400 米 ， 小胖 跑 了 6 圈 ， 小巧 跑 了 4 圈 ， 他们 一共 跑 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "871", "content": "何 斌 读 一本 故事书 ， 前 4 天 平均 读 25 页 ， 后来 加快速度 ， 每天 比 原来 多 读 15 页 ， 这样 又 经过 6 天 正好 读完 这 本书 ． 他 平均 每 读 了 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "676", "content": "小 明 家 有 192 只 山羊 ， 其中 16 只 黑山羊 ， 其余 的 是 白 山羊 ． 白 山羊 的 只 数 是 黑山羊 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8737", "content": "甲 、 乙 两地 相距 243 千米 ， 一列 快车 和 一列 慢车 同时 从 两地 相对 开出 ， 1.5 小时 后 相遇 ． 已知 快车 速度 为 94.5 千米 / 时 ， 求 慢车 速度 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12047", "content": "每箱 旺 仔 牛奶 有 24 瓶 ， 妈妈 给 林 雪 买 了 32 箱 ． 请 你 给 她 算算 一共 有 多少 瓶 旺 仔 牛奶 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17091", "content": "27.2 - 11.8 与 13 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20581", "content": "用 (6/7) 的 (1/3) / 6 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3431", "content": "一 条 裤子 78 元 ， 一双 皮鞋 的 价钱 是 裤子 的 3 倍 ， 爸爸 买 一条 这样 的 裤子 配 一双 皮鞋 ， 共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13077", "content": "一 个 果园 的 形状 是 平行四边形 ， 底 是 115 米 ， 高 是 80 米 ， 如果 每棵 果树 占地 10 米 ^ 2 ， 这个 果园 一共 可 植 多少 棵 树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12583", "content": "爸爸 开车 带 小 俊 出门 旅游 ， 油箱 里 原来 还有 32 千克 汽油 ， 这辆 车 的 耗油量 约 是 每 千米 0.4 千克 ， 他们 去 的 旅游点 要 行 120 千米 ， 至少 还 需要 加多少 汽油 才能 到达 旅游点 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8929", "content": "发电厂 共运 来 2500 吨 煤 ， 用 去 一部分 后 ， 还 剩 40% ， 用 了 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2824", "content": "实验 小学 组织 师生 580 人 去 秋游 ， 坐满 10 辆车 后 还 剩 20 人 ． 平均 每辆车 坐 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5148", "content": "学校 新购 一批 成套 课桌椅 ， 共用 了 2380 元 ， 课桌 每张 48 元 ， 椅子 每 把 20 元 ， 学校 购进 多少 套 课桌椅 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13521", "content": "一 个数 的 (5/8) 是 20 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4588", "content": "飞机 每 小时 飞行 850 千米 ， 4 小时 可 飞行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10366", "content": "学校 的 教学大楼 每 上 一层 要 走 16 个 台阶 ， 那么 小 明 从 1 楼 走 到 4 楼 ， 然后 回到 2 楼 ， 小 明 一共 走 了 多少级 台阶 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3152", "content": "（ 十00 如 • 丰县 ） 一种 商品 原价 100 元 ， 连续 两次 降价 10% 后 ， 售价 应 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22938", "content": "16 / 2 的 商 加上 4 个 3.5 的 和 ， 结果 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22031", "content": "农场 今年 产 小麦 280 吨 ， 比 去年 增产 (1/4) ， 去 年产 小麦 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12665", "content": "小 华 体重 30 千克 ， 小 丽 比 小 华 重 (1/6) ， 小 丽 体重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15699", "content": "12 个 30 连续 相加 ， 结果 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22100", "content": "小 明 看 一本 105 页 的 书 ， 第一天 看 了 30 页 ， 第 二 天 看 了 剩下 的 (1/3) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "5528", "content": "水果店 运 来 苹果 、 荔枝 各 6 箱 ． 苹果 每箱 25 千克 ， 荔枝 每箱 21 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11883", "content": "食堂 买进 一车 煤 ， 计划 每天 用 1.5 吨 ， 可以 用 40 天 ． 实际 每天 只用 了 1.2 吨 ， 实际 比 计划 多用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20807", "content": "一 袋 大米 50 千克 ， 粮店 的 20 袋 大米 4 天 就 卖完 了 ． 粮店 平均 每天 卖 多少 千克 大米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10068", "content": "一 个 半导体 元件厂 实行 生产 自动化 后 ， 一种 元件 的 生产成本 比 原来 降低 了 20% ， 现在 每件 成本 是 30 元 ， 原来 每件 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4937", "content": "食品店 分装 糖果 ， 每 袋装 0.25 千克 的 酥糖 和 0.15 千克 的 水果糖 ， 当 水果糖 用 去 7.2 千克 时 ， 酥糖 用 去 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11783", "content": "《 童话世界 》 和 《 海洋 世界 》 两套 丛书 共用 去 260 元 ， 一套 《 童话世界 》 丛书 的 价钱 是 《 海洋 世界 》 的 (5/8) ， 一套 《 海洋 世界 》 丛书 的 价钱 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20916", "content": "修路 队 修 一条 1200 米 长 的 马路 ， 第一天 修 了 全长 的 (1/6) ， 第 二 天 修 了 全长 的 20% ， 两天 一共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1649", "content": "旺旺 水果店 2 千克 橘子 15 元 ， 3 千克 苹果 24 元 ． 赵老师 要 买 8 千克 橘子 和 6 千克 苹果 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5028", "content": "四年级 同学 去 看 儿童剧 ． 一班 去 了 32 个 学生 ， 二 班 去 了 34 个 学生 ， 还 去 了 2 位 班主任 老师 ． 学生票 6 元 ， 成人 票 12 元 ， 买票 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "14363", "content": "建设 小学 低年级 有 学生 325 人 ， 中 高年级 学生 人数 是 低年级 的 4 倍 ． 低年级 学生 比 中 高年级 学生 少 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8689", "content": "在 比例尺 是 4 ： 1 的 图纸 上 量 得 一种 零件 长 8 厘米 ， 这个 零件 实际 长 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13076", "content": "比 15 多 3 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19027", "content": "90 减去 它 的 20% 后 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4160", "content": "商店 运 来 4 箱 足球 ， 每箱 20 个 ， 这些 足球 的 总价 为 3360 元 ． 平均 每个 足球 价值 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16993", "content": "一 列 火车 3 小时 行驶 了 246 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 的 铁路 长 1066 千米 ， 火车 几小时 能 到达 乙地 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12222", "content": "仓库 里 有 1500 吨 梨 ， 平均 每天 运出 200 吨 ， 运 了 6 天 ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14889", "content": "一 件 上衣 128 元 ， 一条 裤子 72 元 ． 王 阿姨 打算 购进 这样 的 服装 15 套 ， 她 至少 要 带 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1080", "content": "一 个 平行四边形 的 面积 为 96 平方厘米 ， 底 是 12 厘米 ， 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23014", "content": "有 一块 布 ， 用 去 了 (3/5) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2749", "content": "同学 们 做 游戏 ， 男生 有 26 人 ， 女生 有 18 人 ， 现在 要 按 4 个人 分 一组 ， 可以 分成 几组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15850", "content": "食堂 张 叔叔 在 菜场 买 0.5 千克 豆角 ， 交给 售货员 10 元 钱 后 ， 找回 7.9 元 ． 每千克 豆角 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15779", "content": "甲 数 是 36 ， 甲 数 的 (1/4) 与 乙 数 的 (1/3) 相等 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16873", "content": "学校 召开 秋季 田径运动 会 ， 五年级 3 位 班主任 统计 参加 比赛项目 的 人数 如下 ： 参加 径赛 的 有 37 人 ， 参加 田赛 的 有 25 人 ， 其中 既 参加 田赛 又 参加 径赛 的 有 10 人 ， 田赛 径赛 都 没 参加 的 有 113 人 ． 这 可 把 余 老师 搞糊涂 了 ！ 听说 你 挺 会 动脑筋 ， 快 告诉 老师 五年级 有 多少 学生 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16228", "content": "果园 里 有 果树 160 棵 ， 梨树 占 其中 的 (3/8) ， 梨树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17426", "content": "从 6 名 学生 中选 4 人 参加 知识 竞赛 ， 其中 甲 被 选中 的 概率 为 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14774", "content": "小兵 去 跑步 ， 每分钟 跑 250 米 ， 出发 5 分钟 后 ， 小 军 骑 着 自行车 去 追 ， 每分钟 行 400 米 ， 多少 分钟 后 可以 追 上 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8530", "content": "龟 兔 赛跑 ， 全程 1995 米 ， 乌龟 每分钟 爬 15 米 ， 兔子 每分钟 跑 133 米 ． 兔子 自 以为 跑得快 ， 在 途中 睡 了 一 觉 ， 结果 反而 比 乌龟 晚 到 3 分钟 ， 兔子 在 途中 睡 了 多少 分钟 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6844", "content": "算式 143 * 21 * 4 * 37 * 2 的 计算结果 = ．", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "13998", "content": "从 甲地 到 乙地 ， 可以 乘火车 ， 也 可 乘 轮船 ， 还 可以 乘飞机 ． 在 一天 中 ， 从 甲地 到 乙 有 4 班 火车 ， 2 班 轮船 ， 1 班 飞机 ． 那么 在 一天 中 乘坐 这些 交通工具 从 甲地 到 乙地 ， 共有 多少 种 不同 的 走法 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8151", "content": "甲 、 乙 两地 相距 360 米 ， 一辆 汽车 从 甲地 开往 乙地 ， 计划 9 小时 到达 ． 因 天气 变化 ， 实际 每 小时 比 计划 少 行 4 千米 ， 实际 多少 小时 才能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17888", "content": "甲乙 两地 相距 600 千米 ， 一辆 汽车 从 甲地 出发 开往 乙地 ， 已经 行 了 全程 的 (4/5) ， 这时 汽车 距 乙地 有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7980", "content": "拖拉机 后轮 的 直径 是 1.2 米 ， 后 轮转 一周 前进 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17428", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 的 速度 是 每 小时 57 千米 ， 共用 4 小时 ， 返回 时 只用 3 小时 ， 这辆 汽车 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9677", "content": "一 块 体积 是 30 m ^ 3 的 长方体 大理石 ， 底面 是 面积 为 6 m ^ 2 的 长方形 ， 这块 大理石 的 高 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1012", "content": "假如 小麦 的 出粉率 是 85% ， 那么 用 400 吨 小麦 可以 磨 出 多少 吨 面粉 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20639", "content": "某 地产 集团 投资 1800 万元 建设 香格里拉 住宅 花园 ， 比 原 计划 投资 节约 了 (1/9) ． 原 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3507", "content": "一 个 鸡蛋 重 (1/16) 千克 ， 一个 鹅蛋 的 质量 是 鸡蛋 的 2 倍 ， 一个 鹅蛋 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1557", "content": "商店 为了 搬运 方便 ， 把 4 瓶 啤酒 捆 在 一起 ， 啤酒瓶 的 外 直径 为 10 厘米 ， 用 绳子 捆 一周 ， 至少 要 用 多长 的 绳子 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5538", "content": "甲 、 乙 两车 分别 同时 从 相距 380 千米 的 两地 相对 开出 ， 3 小时 相遇 ． 已知 甲 车 与 乙 车 速度 的 比 是 10 ： 9 ． 相遇 时 乙 车行 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4420", "content": "几个 体操 队员 排成 一队 正 步向前 走 ， 穿 黑 运动服 的 队长 排 在 第 6 个 ． 教练员 发令 ： “ 向后转 ” 后 ， 穿 黑衣服 的 队长 排 在 第 5 ， 这 队 一共 有 多少 个 体操 队员 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21921", "content": "一 个 长方形 的 大厅 ， 长 16.5 米 ， 宽 8.4 米 ， 用 每块 面积 为 0.12 平方米 的 方砖 铺 地 ． 至少 需要 方砖 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "809", "content": "花 店里 有 335 枝 玫瑰花 ， 卖出 了 268 枝 ． 今年 又 运来了 289 枝 玫瑰花 ． 花 店里 现在 有 多少 枝 玫瑰花 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4102", "content": "某校 有 男生 240 人 ， 女生 是 男生 的 (1/4) ， 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17686", "content": "把 一个 棱 长 是 2 dm 的 正方体 木块 ． 平均 分成 两个 小 长方体 木块 ， 表面积 增加 了 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20433", "content": "在 跳远 比赛 中 ， 小 华 跳出 了 3.26 米 ， 小 东 比 小 华 多 跳 0.4 米 ， 小强 比 小 东 少 跳 0.25 米 ， 小强 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5119", "content": "商店 购回 960 个 杯子 ， 营业员 将 它 6 个 装 一盒 ， 8 盒装 一箱 ， 能 装 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8215", "content": "学校 图书室 里 有 图书 3000 册 ， 其中 科技 书 占 (3/10) ， 文艺 书 是 科技 书 的 (5/9) ， 有 文艺 书 多少 册 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10677", "content": "一 只 轮船 运货 5000 吨 ， 是 一只 木船 运货 量 的 625 倍 ． 一只 木船 运货 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7807", "content": "某 钢 金厂 每天 加工 10 个 零件 ， 需要 用 0.6 吨 圆钢 ， 现 需 紧急 加工 100 个 这样 的 零件 ， 要 多少 吨 圆钢 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6545", "content": "有 浓度 为 15% 的 盐水 600 克 ， 为了 制成 浓度 为 20% 的 盐水 ， 需要 蒸发掉 多少 克 水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7991", "content": "园林 今年 种 了 48 棵 杨树 ， 松树 的 棵 树 是 杨树 的 12 倍 ， 杨树 和 松树 一共 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12965", "content": "养鸡场 用 2400 个 鸡蛋 孵小鸡 ， 有 5% 没有 孵出来 ， 孵出来 的 小鸡 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7069", "content": "“ 十一 ” 期间 ， 小 军 一家 计划 旅游 消费 1500 元 ． 实际 消费 1800 元 ． 实际 消费 比 计划 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8383", "content": "小 亮 的 身高 是 1.45 米 ， 爸爸 比 小 亮 高 0.42 米 ， 爸爸 的 身高 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8679", "content": "李老师 在 去年 9 月 10 日 把 2000 元 存入 银行 ， 定期 3 年 ， 如果 年利率 按 3.24% 计算 ， 到期 后 他 可以 取出 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1802", "content": "商店 运 来 10 筐 苹果 ， 从 每 筐 苹果 中 取出 15 千克 ， 余下 的 苹果 恰好 是 原来 4 筐 苹果 的 重量 ， 原来 每 筐 苹果 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13550", "content": "小 明 第一天 写 5 个 大字 ， 以后 每 一天 都 比 前一天 多 写 2 个 大字 ， 6 天 后 小 明 一共 写 了 多少 个 大字 ．", "knowledge": ["+"], "difficulty": 1.9, "length": 41}
-{"question_id": "18657", "content": "一 辆 客车 从 甲地 开往 乙地 ， 前 5 小时 行 了 400 米 ， 正好 行 了 全程 的 (2/5) ． 照 这样 速度 ， 到 乙地 还要 行 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8326", "content": "水果店 运 来 18 箱 苹果 ， 运 来 的 梨 是 苹果 的 5 倍 ， 水果店 运 来 苹果 和 梨 一共 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3282", "content": "10 / (5/12) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8252", "content": "小 明 看 一本 故事书 ， 已经 看 了 35 页 ， 正好 相当于 全书 的 (7/11) ， 这本 故事书 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7705", "content": "植树 队 有 3 个 小组 ， 每个 小组 有 14 人 ， 要 植 1554 棵 树 ， 平均 每人 植 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3517", "content": "亮 亮 买 了 2 本 记录本 和 4 支 铅笔 ， 红红 买 了 14 支 同样 的 铅笔 ， 两 人 用 去 的 钱 同样 多 ． 一本 记录本 的 价钱 = 多少 支 铅笔 的 价钱 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6111", "content": "一 双 运动鞋 原来 卖 260 元 ． “ 5 一 ” 促销 时 打 0.7 出售 ， 每 双 只 卖 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7837", "content": "吉林 足球 代表队 去 广州 参加 比赛 ， 中途 需要 到 北京 中转 ． 从 吉林 到 北京 有 3 种 出行 方式 ， 从 北京 到 广州 有 2 种 出行 方式 ． 吉林 代表队 从 吉林 到 广州 共有 多少 种 不同 的 出行 方式 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22551", "content": "甲 、 乙 两 校 ， 甲 校 有 学生 525 人 ， 乙 校 比 甲 校 的 2 倍 少 50 人 ， 乙 校 有 学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2364", "content": "(3/4) * 8 的 结果 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3758", "content": "一 本 故事书 180 页 ， 小 明 计划 20 天 看 完 ， 如果 要 提前 2 天 看 完 ， 小 明 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19128", "content": "小 丽 有 10.5 元 钱 ， 小 芳 的 钱 比 小 丽 的 3 倍 少 8.2 元 ， 两 人 共有 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14970", "content": "李师傅 做 了 一批 零件 ， 做 的 零件 合格 了 1900 个 ， 合格率 为 95% ， 李师傅 一共 做 了 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4789", "content": "（ 42 + 45 ） * 10 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5431", "content": "校 举办 运动会 ， 全校 有 (5/6) 的 人 参加 ， 其中 有 男生 90 人 ， 占 参赛 人数 的 (3/7) ， 这个 学校 有 多少 学生 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14163", "content": "超市 进行 摸 球 有奖 活动 ， 盒子 里 装有 黄 、 红 、 绿 3 种颜色 的 球 ， 红球 占 黄 球 的 (1/15) ， 是 绿 球 的 (1/9) ， 黄 球 有 30 个 ， 绿 球 有 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12609", "content": "一 个数 加上 210 再 减去 70 ， 结果 是 320 ， 这个 数 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10150", "content": "6 （ 1 ） 班 有 女生 20 人 ， 男 、 女生 人数 的 比 是 5 ： 4 ． 全班 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22500", "content": "计算 ( (1/2) + (1/3) ) * (3/4) / (1/4) = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22365", "content": "王老师 带 了 500 元 去 买 18 个 文具盒 ， 找回 32 元 ， 每个 文具盒 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17680", "content": "三年级 3 个 班 的 同学 去 秋游 ， 每班 都 是 46 人 ． 现在 已 到 124 人 ， 还有 多少 人 还 没有 到 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4437", "content": "一 家 电脑公司 ， 十 月份 按照 20% 的 税率 缴纳 了 营业税 ， 税后 的 实际收入 为 16.8 万元 ． 这家 电脑公司 的 纳税 额 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16218", "content": "每支 水笔 3 元 ， 小 刚 现在 有 22 元 ， 还 需要 多少 元 ， 就 可以 买 8 支 水笔 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1420", "content": "奥运 吉祥物 商店 某 天 上午 售出 福娃 129 套 ， 下午 售出 161 套 ， 已知 下午 比 上午 多 收入 2880 元 ． 每套 福娃 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1707", "content": "一 个数 的 75% 是 39 ， 它 的 (1/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1248", "content": "六年级 学生 积极 参加 兴趣小组 活动 ， 参加 语文 组 的 有 30 人 ， 占 六年级 学生 人数 (1/5) ， 参加 数学组 的 人数 占 六年级 人数 (3/10) ， 参加 数学组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17102", "content": "小 明 每分钟 可以 走 80 米 ， 7 分钟 可以 走 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17606", "content": "油菜籽 的 出油率 为 42% ， 250 千克 油菜籽 可 榨油 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2439", "content": "丁丁 今年 身高 165 厘米 ， 比 去年 长 高 5 厘米 ， 今年 比 去年 长 高 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9787", "content": "两个 小伙伴 称 体重 ， 小强 重 25.7 千克 ， 小 芳 比 小强 轻 1.04 千克 ， 两 人 体重 共 = 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17353", "content": "六年级 办公室 买进 一包 白纸 ， 计划 每天 用 20 张 ， 可以 用 28 天 ． 由于 注意 了 节约 用纸 ， 实际 每天 少 用 了 4 张 ， 这 包 白纸 实际 可以 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12499", "content": "李老师 家 新 买 了 一套 96 平方米 的 房子 ， 每平方米 5400 元 ， 李老师 买 这 套 房子 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10376", "content": "1 支 钢笔 比 3 支 圆珠笔 贵 5 元 ． 每支 钢笔 15.5 元 ， 每支 圆珠笔 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4638", "content": "小 明 两周 看 完 了 一 本书 ， 第一周 看 了 132 页 ， 第 二 周 看 了 这 本书 的 56% ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3883", "content": "一 批 产品 共 300 个 ， 有 9 个 废品 ， 从中 任 取 一个 ， 是 废品 的 可能性 是 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13131", "content": "海水 的 含盐 率 是 0.3% ， 要 晒盐 1.23 吨 ， 盐田 要 至少 灌入 海水 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8887", "content": "工地 上 运 来 800 包 水泥 ， 第一周 用 去 (2/5) ， 第 二 周 用 去 (3/8) ， 还 剩下 多少 包 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14370", "content": "一 根 铁丝 长 5 米 ， 第一次 用 去 它 的 (4/15) ， 第 二 次 又 用 去 (2/5) 米 ， 这根 铁丝 被 用 去 多少 米 ？ 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17948", "content": "张飞 回家 ， 3 分钟 走 180 米 ， 照 这样 ， 再 走 6 分 到 家 ， 他 回家 一共 走 多少 米 的 路 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22681", "content": "机器厂 生产 一批 零件 ， 原 计划 每天 生产 240 个 ， 20 天 完成 ， 实际 每天 多 生产 60 个 ， 实际 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9680", "content": "计算 350 / （ 35 - 28 ） 时 ， 应 先 算 多少 ， 再 算 多少 ， 结果 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13654", "content": "一 个数 的 (9/7) 是 (1/2) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17349", "content": "卖花 姑娘 有 500 枝 玫瑰 ， 7 枝 一束 ， 扎 了 40 束 ． 余下 的 玫瑰 5 枝 一束 ， 她 还 可以 扎 几束 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18914", "content": "商店 有 一款 售价 为 500 元 的 自行车 ， 商店 为了 搞 促销 ， 先 提价 5% ， 再 0.8 销售 ， 最后 商店 让利 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13672", "content": "一 副 球拍 原 标价 是 48 元 ， 学校 购买 时 ， 每 副 降价 15 元 ， 现在 买 28 副 羽毛球拍 ， 比 原来 少付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14423", "content": "学校 新 买进 一批 图书 ， 每班 分 得 48 本 ， 分给 12 个 班 后 还 剩 24 本 ， 这 批 图书 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6985", "content": "一 个数 乘 (2/3) 与 (4/7) 的 和 ， 所得 的 积 是 1 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6573", "content": "已知 两个 因数 的 积 是 51 ， 其中 一个 因数 是 (17/9) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12939", "content": "学校 春季 田径运动 会 跳高 比赛 中 ， 亮 亮 跳 了 1.2 米 ， 兰兰 比 亮 亮 跳 的 高 了 0.05 米 ， 张 奇 比 兰兰 跳 的 低 了 0.35 米 ， 张 奇 跳 过 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19848", "content": "甲 乙丙 3 人 同时 从 a 地 跑 到 b 地 ， 当 甲 到达 b 地 时 ， 乙 离 b 地 20 米 ， 丙 离 b 地 40 米 ； 当 乙 到达 b 地 时 ， 丙 离 b 地 24 米 ， ab 两地 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18529", "content": "第一次 游走 6 只 小鸭 ， 第 二 次 游走 8 只 小鸭 ， 两次 游走 多少 只 小鸭 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3110", "content": "学校 开展 植树 活动 ， 五年级 同学 植 了 120 棵 ， 六年级 比 五年级 多 植 了 (1/6) ， 六年级 植 了 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21148", "content": "劲 霸 专卖店 现阶段 在 搞 开业 周年 庆典 ， 所有 服装 优惠 30% ， 原来 卖 150 元 一件 的 衬衣 ， 现在 买 要 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4350", "content": "4.08 - 0.8 与 5 的 积 ， 所得 的 差 除以 0.4 ， 结果 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "482", "content": "汪 芳 5 分钟 走 300 米 ， 照 这样 的 速度 ， 她 从 家 到 学校 要 走 12 分钟 ， 她家 离 学校 多 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4329", "content": "一 项 工程 ， 甲 独 做 (1/5) 小时 完成 ， 乙 独 做 (1/6) 小时 完成 ， 如果 甲乙 合 做 ， 多少 小时 完成 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2360", "content": "甲 数 的 (3/4) 等于 乙 数 的 25% ， 已知 乙 数 是 120 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5002", "content": "一 本书 有 360 页 ， 小 明 第一个 星期 看 了 全书 的 (1/3) ， 那么 第 二 个 星期 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20012", "content": "有 32 支 龙舟队 参见 了 今年 龙舟 比赛 ， 最后 有 6 支队 进入 决赛 ， 进入 决赛 ， 进入 决赛 的 队 占 所有 参赛队 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21973", "content": "我市 去年 小学 毕业生 有 6000 人 ， 今年 比 去年 多 (1/20) ． 今年 小学 毕业生 有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5495", "content": "白兔 有 25 只 ， 灰 兔 有 30 只 ． 灰 兔 比 白兔 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11305", "content": "把 一个 棱 长 为 8 分 米 的 正方体 钢 块 ， 锻造 成 一个 宽 4 分 米 ， 高 2 分 米 的 长方体 钢件 ， 这个 钢件 的 长 = 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15497", "content": "学校 买 了 18 个 篮球 和 20 个 足球 ， 共 付 了 490 元 ， 每个 篮球 14 元 ， 每个 足球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17634", "content": "一 辆 旅游车 从 县城 开往 景点 用 了 3 小时 ， 速度 是 60 千米 / 时 ， 从 景点 返回 时 用 了 2 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5020", "content": "一 批 花生 种子 的 成活率 是 80% ～ 90% ． 现 要 保证 3600 棵 花生 成活 ， 至少 要 种 下 多少 粒 种子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10363", "content": "某 中介 公司 为 顾客 出售 房屋 收 2% 的 中介费 ， 中介 公司 为 李 大伯 出售 房屋 一套 ， 收取 中介费 1700 元 ． 若 李 大伯 卖房 还要 缴纳 1.5% 的 契税 ， 李 大伯 缴纳 契税 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "524", "content": "司机 王师傅 帮 商场 运 液晶电视 20 台 ， 合同 事先 规定 完好 运送 一台 得 70 元 ， 途中 损坏 的 倒赔 40 元 ， 没有 运到 不得 钱 ， 现在 他 已 全部 运到 ， 得 了 1070 元 ， 他 损坏 了 几台 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20514", "content": "王 云 在 计算 325 - □ * 5 时 先 算了 减法 ， 结果 得出 1500 ， 那么 这 道 题 的 正确 结果 应该 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14171", "content": "南京长江大桥 铁路桥 约 长 6800 米 ， 武汉长江大桥 相当于 它 的 (1/4) ， 武汉长江大桥 约 长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4529", "content": "卢 下 村 扩大 生猪 养殖 规模 ， 今年 养殖 生猪 2400 头 ， 比 去年 增加 (3/7) ， 去年 养殖 生猪 多少 头 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12020", "content": "仓库 里 有 10 吨 钢材 ． 第一次 用 去 总数 的 20% ， 第 二 次 用 去 (3/4) 吨 ． 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11185", "content": "植树节 5 （ 1 ） 班 同学 植树 的 成活率 是 95% ， 没有 成活 的 有 10 棵 ． 他们 共 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19700", "content": "师徒 两 人 共同 加工 一批 零件 ， 3 小时 后 完成 任务 ， 师傅 每 小时 加工 150 个 零件 ， 徒弟 每 小时 加工 零件 的 个数 是 师傅 的 (2/5) ， 徒弟 共 加工 零件 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7580", "content": "果园 里 有 桃树 180 棵 ， 梨树 比 桃树 多 (2/15) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8141", "content": "超市 上午 卖出 大米 176 袋 ， 下午 比 上午 少卖 43 袋 ， 这 一天 共 卖 大米 多少 袋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17115", "content": "实验 小学 有 男生 900 名 ， 女生 人数 是 男生 人数 的 (7/9) ， 实验 小学 一共 有 几 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13617", "content": "小 明 从 底楼 跑 到 4 楼 ， 共用 了 12 秒 ， 照 这样 计算 ， 他 如果 从 底 搂 跑 到 10 楼 需要 多少 秒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1087", "content": "某 空调 生产 车间 ， 原 计划 每天 生产 40 台 空调 ， 15 天 可以 完成 任务 ； 实际 每天 比 原 计划 多 生产 10 台 ， 实际 生产 这 批 空调 用 了 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13126", "content": "560 比 80 多 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17503", "content": "一 个数 比 20 的 2% 多 4 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16718", "content": "我 既 是 3 的 倍数 ， 又 是 2 的 倍数 ， 也 是 5 的 倍数 ， 且 比 40 小 ， 我 是 谁 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7457", "content": "某 园林 厂 去年 栽树 4500 棵 ， 今年 计划 比 去年 多 栽 20% ， 今年 计划 栽树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16969", "content": "一 个数 的 25% 是 125 ， 它 的 50% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17720", "content": "笑笑 从 家 到 学校 要 走 30 分钟 ， 他 走 了 12 分钟 ， 还要 走 全程 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21891", "content": "小 刚 上午 8 时 开车 去 乙地 ， 中午 12 时 到达 ， 一共 行驶 了 328 千米 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20276", "content": "一 块 地 ， (1/12) 种 玉米 ， (5/12) 种 青菜 ， 其余 种 西瓜 ． 种 西瓜 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9842", "content": "10.2 - (6/5) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15152", "content": "一 本 童话 书 得 价格 是 48 元 ， 一本 科技 画 的 价格 是 6 元 ， 一本 童话 书 的 价格 是 一本 科技 画 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7997", "content": "一 包 糖 ， 奶糖 占 总数 的 (9/20) ， 后 又 放入 16 块 水果糖 ， 这时 奶糖 占 总数 的 25% ， 有 奶糖 多少 块 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3405", "content": "水 步 中心小学 的 学生 参加 舞蹈 表演 ， 有 54 名 女生 参加 ， 女生 的 人数 是 男生 的 3 倍 ． 参加 舞蹈 表演 的 学生 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9307", "content": "火车 长 108 米 ， 每秒 行 12 米 ， 经过 长 48 米 的 桥 ， 要 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21943", "content": "汽油 每 升 7.05 元 ， 小巧 的 父亲 为 车 加 了 20.8 升 ， 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14628", "content": "某 车间 原有 工人 25 人 ， 其中 女工 有 18 人 ， 后来 又 调进 多少 名 男工 ， 这时 女工 人数 正好 占 车间 人数 的 (3/5) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10990", "content": "4.8 + 3.6 与 8 的 积 所得 的 和 除以 1.2 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19645", "content": "每 上 一层 要 走 12 个 台阶 ， 家住 6 楼 的 小 明 到 一楼 要 走 多少 个 台阶 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11410", "content": "五年级 一班 有 学生 45 人 ， 其中 男生 人数 占 全班 的 (3/5) ， 求 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3953", "content": "学校 组织 同学 们 参观 “ 生物科技 展览 ” ， 四年级 来 了 245 人 ， 三年级 来 了 265 人 ． 分 5 批 参观 ， 平均 每批 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "317", "content": "5 年 一班 原有 班费 24.2 元 ， 同学 们 卖 废品 又 得到 16.4 元 ． 用 这些 钱 可以 买 14 根 跳绳 ， 每 根 跳绳 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10569", "content": "买 5 箱 矿泉水 、 每箱 24 瓶 ， 每瓶 2 元 ， 一共 要 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15720", "content": "兴趣小组 有 6 个 女同学 ， 男同学 的 人数 是 女同学 人数 的 2 倍 还 多 3 人 ， 兴趣小组 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14082", "content": "一 个 自行车厂 第一季度 计划 生产 自行车 1200 辆 ， 实际 生产 1500 辆 ． 完成 计划 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2394", "content": "学校 图书室 购进 图书 264 本 ， 其中 科技 书 占 总数 的 (1/3) ， 故事书 占 总数 的 (5/12) ． 这 两种 书 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15190", "content": "一 根 木棒 锯 成 两段 ， 第一段 长 38.7 米 ， 第 二 段 比 第一段 长度 的 1.5 倍 还 长 2.3 米 ， 这根 木棒 原来 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6485", "content": "一 件 上衣 200 元 ， 一条 裤子 比 上衣 便宜 27 元 ， 一条 裤子 多少 钱 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18957", "content": "电子玩具 每 只 19.8 元 ， 张 叔叔 为 孩子 们 买 了 2 只 同样 的 玩具 ， 付出 50 元 ， 可以 找回 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9740", "content": "(1/5) 比 (1/4) 少 多少 %", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12356", "content": "张大妈 准备 养猪 ， 她 先买 了 5 只 小猪 花 了 275 元 钱 ． 她 还 想 再 买 16 只 这样 的 小猪 ， 需要 准备 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21424", "content": "绿化 组 原 计划 在 马路 的 一侧 每隔 9 米 种 一棵树 ， 连 两头 在内 共 能 种 81 棵 树 ． 今 改变 计划 ， 结果 用 等 距离 种树 121 棵 ． 求 现在 两 树 之间 的 棵 距 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16247", "content": "杨 杨家 有 12 盆花 ， 正好 是 丽丽 家养 花 的 盆 数 的 (3/5) ， 莎 莎 家养 花 的 盆 数 是 丽丽 家 的 (7/10) ， 莎 莎 家养 了 多少 盆花 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7088", "content": "火车 速度 比 汽车 速度 快 60% ， 汽车 速度 比 火车 慢 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19364", "content": "商店 以 每支 10 元 的 价格 购进 一批 钢笔 ， 加上 40% 的 利润 以后 定价 出售 ， 当 还 剩 这 批 钢笔 的 (1/4) 时 就 已经 获利 240 元 ． 这 批 钢笔 共有 多少 支 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18122", "content": "学校 报告厅 的 座位 号码 都 是 由 一个 英文字母 和 一个 数 组成 的 ， 并且 都 是 字母 在 前 ， 数 在 后 ． 已知 编 这些 号码 一 共用 了 26 个 英文字母 ， 同时 又 用 了 1 - 30 这些 数 ， 这个 剧场 有 多少 个 座位 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "555", "content": "服装厂 生产 童装 665 套 ， 生产 成人 服装 是 童装 的 7 倍 ， 生产 成人 服装 共 多少 套 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19643", "content": "将 一个 长方体 的 铁块 ， 浸没 在 底 面积 是 50 平方厘米 的 圆柱形 玻璃缸 里 ， 这时 水面 上升 了 4 厘米 ． 这个 长方体 铁块 的 体积 = 多少 立方厘米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15646", "content": "一 根 彩带 长 (5/6) 米 ， 第一次 用 去 (1/2) 米 ， 第 二 次 用 去 (1/6) 米 ， 这时 彩带 比 原来 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7357", "content": "一 块 长方形 广告牌 长 1.5 米 ， 宽 2.3 米 ． 如果 要 油漆 这 张 广告牌 ， 每平方米 用 油漆 0.6 千克 ， 一共 需要 多少 千克 油漆 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17750", "content": "什么 数 的 2 倍 比 25 个 4.6 少 15 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7253", "content": "果园 里 有 苹果树 480 棵 ， 梨树 的 棵 数 是 苹果树 的 (5/8) ， 又 是 桔子 树 的 (3/4) ． 桔子 树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18982", "content": "一 件 衣服 进价 120 元 ， 按 标价 0.8 出售 仍 赚 32 元 ， 则 标价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15126", "content": "一 种 皮大衣 ， 每件 降低 380 元 后 售价 为 1620 元 ， 这种 皮大衣 的 售价 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18477", "content": "甲 每 小时 行 9 千米 ， 乙 每 小时 行 7 千米 ， 甲 从 南庄 向 南行 ， 同时 乙 从 北庄 向 北 行 ． 经过 3 小时 后 ， 两 人 相隔 60 千米 ． 南北 两 庄 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6574", "content": "两个 因数 的 积 是 14.6 ． 其中 一个 因数 扩大 到 它 的 2 倍 ， 另 一个 因数 扩大 到 它 的 4 倍 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18631", "content": "水果店 一天 卖出 108 箱 苹果 ， 是 卖出 梨 的 (9/10) ， 卖出 的 橘子 是 梨 的 (5/8) ， 卖出 橘子 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20529", "content": "a 、 b 两地 相距 320 千米 ， 甲 、 乙 两车 同时 从 两地 相对 开出 ， 甲 车 每 小时 行 38 千米 ， 乙 车 每 小时 行 42 千米 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17243", "content": "甲 、 乙 两队 共同 修 一条 路 ， 修 了 12 天 后 ， 甲队 比 乙 队 多 修 360 米 ． 乙 队 每天 修 80 米 ， 甲队 每天 修 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19164", "content": "从 960 中 连续 减去 多少 个 24 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7890", "content": "赶制 一批 服装 ， 10 天 完成 了 (1/4) ， 为了 加快进度 ， 效率 提高 了 50% ， 照 这样 ， 完成 余下 的 任务 还要 多少 天 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17104", "content": "学校 图书室 原有 图书 1400 册 ， 今年 图书 册数 增加 了 12% ． 现在 图书室 有 多少 册 图书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5019", "content": "一 种 小型 电脑 现在 每 台 7800 元 ， 比 原价 降低 了 (1/5) ． 原价 每 台 比 现价 每 台 多 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20356", "content": "六年级 进行 计算 比赛 ， 共 20 题 ， 规定 算 对 一 题 得 5 分 ， 错 一 题 扣 2 分 ． ， 晓 华 得 了 79 分 ， 他 做 对 多少 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13148", "content": "李 阿姨 买 了 3000 元 国家 债券 ， 定期 3 年 ， 年利率 是 3.14% ． 到期 时 ， 她 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19327", "content": "一 堆 沙子 ， 用 去 它 的 (3/4) ， 正好 用 去 15 吨 ， 这 堆 沙子 有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19344", "content": "一 块 田地 ， 其中 (1/4) 种 山芋 ， (1/3) 种 青菜 ， 其余 种 黄豆 ． 种 黄豆 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12453", "content": "里 潭 乡 今年 小麦 播种面积 比 去年 增加 了 30% ， 今年 小麦 播种面积 相当于 去年 的 多少 % ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3225", "content": "参加 学校 绘画 组 的 男生 有 36 人 ， 女生 有 42 人 ， 其中 女生 占 整个 绘画 组 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3582", "content": "一 块 长方形 地 面积 是 280 平方米 ， 如果 宽 是 14 米 ， 那么 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18115", "content": "从 1 里面 减去 (1/5) ， 再 减去 (3/4) ， 得 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6497", "content": "李 红 的 妈妈 十 月份 应纳 个人所得税 额 275 元 ， 如果 按 5% 纳税 ， 应 交纳 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15429", "content": "某 公司 现有 电脑 50 台 ， 又 买来 25 台 ， 第一天 卖出 总数 的 (1/15) ， 第 二 天 卖出 剩下 的 (1/7) ， 两天 共 卖出 电脑 多少 台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "6550", "content": "某 小学 三年级 和 四年级 要 给 620 棵 树 浇水 ， 三年级 每天 浇 40 棵 ， 浇 了 8 天 ； 剩下 的 由 四年级 来 浇 ， 5 天 浇 完 ， 平均 每天 浇 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15588", "content": "刘 叔叔 带 800 元 买 化肥 ． 买 了 16 袋 化肥 ， 剩下 80 元 ， 每 袋 化肥 的 价钱 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2774", "content": "王老师 需要 用 32 分 米 长 的 铁丝 来 围 一个 圆形 木盆 的 底部 ． 他 先 将 一根 铁丝 剪 去 一半 ， 再剪 去 2 分 米 ， 正好 符合要求 ． 原来 这根 铁丝 长 多少 分 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10279", "content": "有 一件 上衣 50 厘米 ， 每 10 厘米 缝 一个 纽扣 ， 衣领 处 和 最 下边 各 缝 一个 ， 这件 衣服 上 缝 多少 个 纽扣 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19100", "content": "某 班上 体育课 ， 全班 排成 4 行 （ 每行 人数 相等 ） ， 小 芳 排 的 位置 是 从前 数 第 6 个 ， 从 后面 数 第 7 个 ， 这个 班 共有 多少 名 学生 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17278", "content": "希望 小学 的 教学楼 有 4 层 ， 每层 有 8 间 教室 ， 每间 教室 有 45 张 课桌 ， 希望 小学 一共 有 多少 张 课桌 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6933", "content": "某 电厂 上个月 计划 烧煤 80 吨 ， 实际 比 计划 节约 了 8 吨 ． 实际 烧煤 吨数 占 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3755", "content": "学校 开展 “ 学雷锋 做好事 4 人 小组活动 ” ． 报名 参加 人数 是 ： 男生 21 人 ， 女生 27 人 ． 一共 可 分成 几个 小组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21799", "content": "小 宁 和 小 青 从 教学楼 一起 出发 去 试验楼 ， 小 宁 每分钟 走 90 米 ， 6 分钟 后 到达 ， 小 青 以 60 米 / 分 的 速度 前进 ， 需要 几分钟 才能 走 到 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18951", "content": "6.2 - 2.4 与 1.3 的 和 ， 所得 的 差 乘以 100 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5924", "content": "新华书店 运 来 故事书 360 本 ， 比 上午 多 运 来 20% ， 书店 上午 运 来 故事书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9145", "content": "a 、 b 两地 相距 270 千米 ， 一辆 货车 和 一辆 客车 分别 从 a 、 b 两地 同时 相向 而 行 ． 已知 货车 的 速度 是 65 千米 / 时 ， 客车 的 速度 是 70 千米 / 时 ． 经过 多少 小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15416", "content": "正方形 的 广场 ， 边长 50 米 ， 董 小 洁 每天 跑 4 圈 ， 每天 跑 多少 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4626", "content": "甲 、 乙 、 丙 3 只 蚂蚁 爬行 的 速度 之 比 是 8 ： 6 ： 5 ， 它们 沿 一个 圆圈 从 同 一点 同时 同 向 爬行 ， 当 它们 首次 同时 回到 出发点 时 ， 就 结束 爬行 ． 问 蚂蚁 甲 追 上 蚂蚁 乙 一共 多少 次 （ 包括 结束 时刻 ） ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20663", "content": "女生 人数 占 全年 级 人数 的 (4/7) ， 男生 比 女生 的 (2/3) 多 40 人 ， 女生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20784", "content": "一 条 山路 长 24 千米 ， 小 华 上山 用 8 小时 ， 下山 用 4.8 小时 ， 小 华 上山 下山 平均 每 小时 行 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22976", "content": "一 件 大衣 现价 320 元 ， 比 原价 降低 了 80 元 ， 这件 大衣 比 原来 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10288", "content": "某班 有 学生 56 人 ， 比 全年 级 的 (1/8) 还 多 7 人 ， 则 全年 级 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23107", "content": "30 名 学生 参加 数学 竞赛 ， 已知 参赛者 中 任何 10 人 里 都 至少 有 一名 男生 ， 那么 男生 至少 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9942", "content": "五年级 某班 参加 秋游 活动 无论是 7 人 编 一组 ， 还是 8 人 编 一组 ， 都 正好 无 剩余 ， 参加 秋游 活动 至少 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11301", "content": "某 小学 有 学生 1800 人 ， 全体学生 参加 平安保险 ， 每人 保险金额 3000 元 ， 保险费率 是 0.1% ． 全校学生 应付 保险费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9006", "content": "食堂 运 来 大米 500 千克 ， 运 来 的 面粉 比 大米 少 (7/10) ， 运 来 的 面粉 比 大米 少 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4473", "content": "小 明 去 游泳池 游泳 ， 他 用 了 6 分钟 游 了 2 个 来回 ， 共 游 了 120 米 ， 平均 每分钟 游 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18839", "content": "一 个 木 工厂 要 做 2000 套 家具 ， 已经 做 了 150 天 ， 每天 做 13 套 ， 还 剩 多少 套 没有 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7665", "content": "海军 小学 召开 三年级 家长会 ， 每排 可以 坐 32 人 ， 坐 了 8 排 还 剩 46 个 家长 没有 座位 ， 一共 有 多少 个 家长 参加 家长会 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15004", "content": "工人 师傅 要 修 一条 水渠 ， 原 计划 每天 修 0.52 千米 ， 40 天 完成 ． 实际 用 了 32 天 就 完成 了 任务 ， 实际 每天 比 计划 多 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5986", "content": "一 个 圆柱 的 底面 半径 是 4 dm ， 高 是 10 dm ， 它 的 侧 面积 = 多少 dm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "1192", "content": "新桥 中介 公司 为 顾客 出售 房屋 收取 2% 的 中介费 ． 中介 公司 为 李先生 出售 房屋 一套 ， 收取 中介费 4700 元 ． 李先生 卖房 还要 缴纳 1.5% 的 契税 ， 李先生 缴纳 契税 要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4927", "content": "甲乙 两 人 同时 从 同一 地点 向 相反 方向 行走 ， 3.5 小时 后 两 人 相距 33.25 千米 ． 甲 每 小时 行走 5 千米 ， 乙 每 小时 行走 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14619", "content": "小 华 读 一本 课外书 ， 第一天 读 了 (1/3) ， 第 二 天 读 了 (1/4) ， 还 剩下 140 页 ， 求 总 页数 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7305", "content": "一 个 比 的 后 项 是 (7/10) ， 比值 是 15 ， 这个 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12719", "content": "一 个 工程队 铺 一条 760 米 长 的 水泥路 ， 前 4 天 铺 了 160 米 ． 剩下 的 每天 铺 50 米 ， 再 用 几天 可以 铺 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18059", "content": "湖州 到 上海 的 公路 全长 168 千米 ， 甲乙 两辆 汽车 分别 从 两城 同时 相对 开出 ， 经过 1.5 小时 交汇 ， 甲 车 每 小时 行驶 58 千米 ． 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18612", "content": "一 辆 汽车 每 小时 行 11.5 千米 ， 28 小时 到达 目的地 ． 如果 每 小时 多行 2.5 千米 ， 行 完全 程 需要 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17370", "content": "五年级 112 名 同学 参加 语文 、 数学考试 ， 每人 至少 有 一门 获 优 ， 已知 语文 获 优者 60 人 ， 数学 获 优者 73 人 ， 只有 语文 一门 获 优 的 人数 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5067", "content": "武汉 到 重庆 的 水路 长 1275 千米 ． 一艘 轮船 从 武汉 开往 重庆 ， 已经 航行 了 全程 的 (3/5) ． 离 重庆 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5827", "content": "水 结成 冰 后 ， 体积 增加 (1/10) ， 现在 有 5 升水 ， 结冰 后 体积 = 多少 立方分米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12326", "content": "小 明 看 一本 240 页 的 书 ， 第一周 看 了 全书 的 (1/4) ， 第 二 周 看 了 全书 的 (1/3) ， 这 本书 还有 多少 页 没 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14748", "content": "星光 小学 的 同学 坐 5 辆车 去 科技馆 参观 ， 前 4 辆车 每辆车 都 坐 60 人 ， 最后 一辆车 坐 57 人 ， 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5605", "content": "李师傅 要 做 600 个 零件 ， 前 8 小时 做 了 480 个 ． 要 完成 全部 任务 ， 一共 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18394", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 每 小时 行 45 千米 ． 早上 8 时 从 甲 城 发车 ， 12 时 到达 乙 城 ， 甲 城 到 乙 城 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22311", "content": "修路 队 修 一条 路 要 21 天 ， 前 11 天 修 了 400 米 ， 剩下 的 每天 修 35 米 正好 修 完 ， 这 条 路 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12384", "content": "修 一段 公路 ， 已修 的 和 未 修 的 比 为 5 ： 4 ， 已修 了 这 段 公路 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12079", "content": "中 诚 工程 公司 第 9 施工队 承包 1500 米 的 修路 工程 ， 前 8 天 完成 了 全部 工程 的 40% ， 照 这样 计算 ， 完成 剩余 的 工程 还 需要 几天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10817", "content": "六年级 学生 在 学校 运动会 上 比 五年级 多 得 8 分 ， 六年级 的 得分 是 五年级 的 1.25 倍 ． 五年级 学生 得 了 多少 分 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19416", "content": "某村 要 收割 3.6 公顷 小麦 ， 前 3 天 共 收割 2.4 公顷 ． 照 这样 计算 ， 余下 的 还要 收割 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3047", "content": "一 段 钢材 长 4 m ， 做 一个 零件 用 (3/20) m 的 钢材 ， 已经 做 了 15 个 这样 的 零件 ， 这 段 钢材 还 剩 多少 m ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12635", "content": "除数 是 (5/7) ， 商 与 除数 的 差 是 10 ， 商 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15349", "content": "小 明 的 爸爸 为 他 买 了 20 瓶 果汁 ， 商店 规定 每 7 个 空瓶 可 换回 3 瓶 果汁 ， 小 明 想 尽量 用 空瓶 换 果汁 喝 ， 这样 他 一共 可 喝 到 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "5149", "content": "到 北京站 之前 ， 火车 上 有 乘客 915 人 ， 在 北京站 下车 的 乘客 有 307 人 ． 上层 的 乘客 有 289 人 ． 火车 从 北京站 开出 后 ， 车上 有 乘客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4598", "content": "一 台 拖拉机 ， 前 4 小时 耕地 240 公亩 ， 后 5 小时 耕地 327 公亩 ． 这 台 拖拉机 平均 每 小时 耕地 多少 公亩 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15869", "content": "王 大伯 家养 了 185 只 公鸡 ， 229 只 母鸡 和 23 只 鸭 ． 养 的 鸡 的 只 数 是 鸭 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15501", "content": "一 款 电话机 ， 调价 后 每部 108 元 ， 相当于 原价 的 (3/4) ． 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4151", "content": "一 辆 汽车 5 小时 行驶 了 320 千米 ． 照 这样 的 速度 ， 又 行驶 了 2.5 小时 ， 这辆 汽车 共 行驶 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3579", "content": "一 个数 的 (5/12) 是 6 ， 那么 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16678", "content": "一 头 蓝鲸 的 体重 比 一头 大象 体重 的 37.5 倍 还 多 10 吨 ． 已知 蓝鲸 的 体重 是 182.5 吨 ， 大象 的 体重 = ？ 请 先 用 算术 方法 解答 ， 若 遇到困难 ， 试用 方程解 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18975", "content": "爸爸 贵阳 开车 去 广州 ， 每 小时 行驶 60 千米 ， 4 小时 到达 广州 ， 贵阳 到 广州 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21115", "content": "从 (2/5) 里面 连续 减去 多少 个 (1/10) 后 得数 为 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12678", "content": "一 个 旅游团 乘车 去 西安 世园 会 参观 ， 每辆 客车 中 乘坐 30 名 游客 ， 途中 一辆 客车 发生 了 故障 ， 把 这辆 车上 的 游客 转移 到 其他 车上 ， 每辆车 要 多 坐 5 人 ， 算 一 算 ， 这个 旅游团 一共 有 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8603", "content": "72.81 里面 有 9 个 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22702", "content": "东湖 小学 六年级 举行 数学 竞赛 ， 共 20 道 试题 ． 做 对 一 题 得 5 分 ， 没有 做 一 题 或 做 错 一 题 倒扣 3 分 ． 刘 刚 得 了 60 分 ， 则 他 做 对 了 多少 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18195", "content": "两个 加数 的 和 是 842 ， 其中 一个 加数 是 408 ， 另 一个 加数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10913", "content": "李 厂长 为 扩大 生产 规模 ， 向 银行贷款 200 万元 ， 贷款 的 年利率 为 5.4% ． 期限 1 年 ， 到期 后 李 厂长 需 付给 银行 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16692", "content": "一 个 比 ， 它 的 前项 是 9 ， 比值 是 (3/4) ， 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17727", "content": "一 堆 钢材 有 48 根 ， 每 根 长 2.45 米 ． 用 去 了 35.8 米 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7875", "content": "马街 乡 投资 修 一条 公路 ， 实际 投资 60 万元 ， 比 计划 投资 节省 15% ， 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11128", "content": "六年级 有 男生 63 人 ， 是 女生 人数 的 (7/8) ， 女生 比 男生 多 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4177", "content": "少年 乐队 有 女生 23 人 ， 男生 18 人 ， 合唱队 的 人数 是 乐队 的 3 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16123", "content": "8.72 / 4.36 的 商 减去 1.8 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15209", "content": "一 节 废电池 在 土壤 里 会 造成 周围 大约 140 平方分米 土地 污染 ， 6 （ 1 ） 班 同学 在 “ 环保 在 心中 ” 活动 中 ， 一天 就 拾起 58 节 废旧电池 ， 这样 减少 了 多少 平方分米 土地 污染 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20551", "content": "水果店 运进 苹果 和 梨 共 4.8 吨 ， 梨 的 重量 相当于 苹果 的 (3/5) ， 苹果 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6370", "content": "小 红 和 小 明 在 环形 跑道 上 跑步 ， 两 人 从 同一 地点 出发 ， 背向 而 行 ． 小 红 每秒 跑 4 米 ， 小 明 每秒 跑 6 米 ， 25 秒 两 人 相遇 ， 这个 环形 跑道 长 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17943", "content": "一 个数 的 (1/9) 是 8 ， 这个 数 的 30% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2124", "content": "一 个数 的 62 倍 是 3596 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11296", "content": "刘 华 看 一本 故事书 ， 每天 看 全书 的 (2/15) ， 多少 天 可以 看 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17119", "content": "333 * 3 * 11 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22575", "content": "对 一个班 的 50 名 同学 做 调查 ， 其中 有 25 名 去过 北京 ， 20 名 去过 桂林 ， 有 10 名 学生 两地 都 去过 ， 那么 有 多少 名 学生 两地 都 没 去 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4590", "content": "游乐园 上午 有 游客 752 人 ， 中午 有 386 人 离去 ， 下午 又 来 了 122 人 ， 这时 游乐园 内 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22305", "content": "现在 有 112 箱 苹果 ， 每箱 苹果 的 质量 相同 ， 都 是 25 千克 ． 这些 苹果 一共 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3104", "content": "一 座 大楼 52 层 ， 每 层楼 高 3 米 ， 这 座 大楼 大约 高 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16932", "content": "商店 运 来 3 种 水果 ， 其中 梨 的 重量 占 (1/5) ． 苹果 的 重量 和 其他 两种 水果 重量 之 和 的 比 为 1 ： 3 ， 苹果 比 梨 多 20 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5284", "content": "小 英 买 了 4 本 练习本 ， 付出 6.5 元 ， 找回 0.3 元 ． 每 本 练习本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15459", "content": "学校 举行 美术 作品展览 ． 一 、 二年级 展出 48 幅 ， 三年级 展出 的 图画 是 一 、 二年级 总数 的 2 倍 ． 3 个 年级 共 展出 多少 幅 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8742", "content": "甲 数 的 (1/3) 与 乙 数 的 (2/5) 相等 ， 乙 数 是 60 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16693", "content": "5 千克 的 香蕉 分给 小朋友 吃 ， 每人 吃 了 (5/13) 千克 ， 吃 香蕉 的 有 几个 小朋友 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15929", "content": "为 绿化 城市 ， 某 街道 栽种 一批 树苗 ， 这 批 树苗 的 成活率 是 75% ～ 80% ， 如果 要 栽 活 2400 棵 树苗 ， 至少 要 栽种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5087", "content": "某 店 去年 的 营业额 是 600 万元 ， 按 营业额 的 5% 缴纳 营业税 ， 要 纳税 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5777", "content": "王老师 把 5000 元 钱 存入 银行 ， 整存整取 5 年 ， 年利率 是 4.14% ． 到期 后 李老师 的 本金 和 利息 共有 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3392", "content": "妈妈 从 超市 买回来 5.2 千克 大米 和 1.5 千克 瘦肉 ， 一 共用 去 25.02 元 ． 知道 大米 每千克 1.35 元 ， 请问 瘦肉 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9818", "content": "科技园 上午 接待 游客 753 人 ， 比 下午 多 169 人 ， 科技园 下午 接待 游客 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7723", "content": "学校 准备 了 1500 元 购买 盆栽 美化 校园 ． 每 盆 的 单价 是 15 元 ， 如果 一次 买 4 盆 只 需要 付 50 元 ， 这样 学校 可以 多 买 几盆 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16671", "content": "一 个数 的 (4/5) 是 (2/9) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15220", "content": "月 星 小学 今年 有 电脑 96 台 ， 比 去年 增加 20% ， 月 星 小学 去年 有 电脑 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1848", "content": "葡萄 晒成 葡萄干 要 减轻 原 质量 的 80% ， 360 千克 可以 晒成 多少 千克 葡萄干 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4503", "content": "把 16.5 米 长 的 钢管 按 7 ： 8 分成 两段 ， 较 长 的 一段 = 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6373", "content": "学校 宿舍 里 有 4 个 房间 ， 每个 房间 有 8 个 床 ， 每个 床上 有 2 条 被子 ， 共有 多少 个 被子 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15161", "content": "一 个 纺织厂 织出 窗帘布 846 米 ， 织出 的 床单 布 是 窗帘布 的 3 倍 ． 织出 的 床单 布 比 窗帘布 多 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10608", "content": "老师 在 商店 里 花 了 56 元 钱 买 了 一条 牛仔裤 ， 因为 那儿 的 牛仔裤 正在 打 0.7 销售 ． 请 同学 们 猜猜看 ， 这 条 牛仔裤 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21222", "content": "□ / 6 = 12 … 2 ， □ 里 应 填 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17600", "content": "若干 轿夫 抬 3 顶 轿 （ 每 顶 轿 4 人 抬 ） 同 到 20 千米 路程 的 地方 ， 平均 每位 轿夫 抬 15 千米 ， 那么 需要 轿夫 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21642", "content": "一 台 压路机 ， 每分钟 行驶 60 米 ， 压路 的 宽度 是 4 米 ． 压路机 行驶 9 分钟 ， 能 压 多 大 的 路面 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6217", "content": "一 根 3.7 米 长 的 竹竿 垂直 插入 水池 中 ， 竹竿 的 入 泥 部分 是 0.4 米 ， 池 水深 2.5 米 ， 你 知道 露出 水面 的 部分 = 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9734", "content": "一 根 钢管 ， 用 去 (3/4) ， 剩下 20 分 米 ， 这根 钢管 原有 多少 分 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1343", "content": "一 车间 原来 男工 比 女工 多 55 人 ， 如果 调 走 男工 5 人 ， 那么 男工 人数 正好 是 女工 人数 的 3 倍 ， 原来 男工 有 几 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9639", "content": "某 工厂 一月份 生产 的 产品 的 增值额 是 12 万元 ． 如果 按照 增值额 的 17% 缴纳 增值税 ， 这个 月 该 工厂 应 缴纳 增值税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22121", "content": "育英 小学 180 名 同学 平均 分成 5 队 做好事 ， 每队 分成 4 组 活动 ． 平均 每组 有 多少 名 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21476", "content": "《 名人 故事集 》 共 9 本 ， 售价 是 75.6 元 ． 平均 每 本 售价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2809", "content": "一 个 汽车轮胎 的 外 直径 是 0.8 米 ， 如果 车轮 每分钟 转 400 周 ， 那么 ， 这辆 汽车 每分钟 能 行驶 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3570", "content": "学校 制 校服 ． 计划 每套 用布 3.8 米 ， 实际 每套 节省 了 0.4 米 ． 原来 计划 做 680 套 校服 的 布料 ， 实际 比 计划 多 做 多少 套 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21546", "content": "小 红 看 一 本书 ， 小 红 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 了 全书 的 (3/10) ， 还 剩 72 页 ． 这 本书 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5718", "content": "一 个 自然数 是 a ， 它 后 一个 自然数 是 b ． a = 49 ， 求 b ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4187", "content": "要 运 一堆 土 ， 如果 每天 运 350 车 ， 需 40 天 才能 运 完 ， 现在 要 提前 5 天 完成 ， 每天 要 运 多少 车 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8693", "content": "商店 运 来 1000 千克 水果 ， 上午 卖出 368 千克 ， 下午 比 上午 多 卖出 42 千克 ， 这 一天 共 卖出 水果 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7419", "content": "小 明 开始 练习 打字 时 ， 每分钟 只能 打 15 个 字 ， 现在 每分钟 打字 的 个数 是 刚 开始 时 的 12 倍 ， 现在 每分钟 打 多少 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17613", "content": "一 堆 沙 重 500 吨 ， 第一天 运走 30% ， 第 二 天 运走 (1/4) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9004", "content": "小 明 和小红 买 同样 的 铅笔 ， 小 明 买 了 7 支 ， 小 红 买 了 4 支 ， 小 明 比 小 红 多 花 了 1.2 元 ． 每支 铅笔 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10430", "content": "筑路 队 修 一条 10 千米 的 公路 ． 第一天 修 了 全长 的 (3/10) ， 第 二 天 修 了 1 米 ， 还有 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22198", "content": "奥 林 小学 六年级 有 学生 95 人 ． 参加 数学 邀请赛 的 人数 占 全年 级 人数 的 (2/5) ， 其中 参赛 女生 有 18 人 ． 参加 数学 邀请赛 的 男生 占 全年 级 人数 的 几分 之 几 ？ [ 思路 点击 ： 找准 单位 “ 1 ” ， 先 求 出 参加 数学 邀请赛 的 学生 数 ] ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1674", "content": "甲 、 乙 两 数 的 积 是 (2/3) ， 甲 数 是 (1/3) ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10158", "content": "5 一节 商场 搞 促销 活动 ， 某 品牌 夹克 每件 原价 480 元 ， 现 打 0.65 出售 ． 王 叔叔 买 了 一件 ， 比 原价 便宜 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19159", "content": "两个 因数 的 积 是 1.05 ， 其中 的 一个 因数 是 1.5 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3227", "content": "王老师 买来 一根 长 30 米 绳子 ， 用 它 的 (3/4) 做 了 6 根 跳绳 ， 还 剩下 多少 米 没有 用 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3469", "content": "小 刚 的 妈妈 买 了 一件 毛衣 花 了 360 元 ， 占 家里 这个 月 支出 的 20% ， 小 刚 家 这个 月 一共 花 了 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11248", "content": "甲 、 乙 两车 同时 从 a ， b 两地 相向 而 行 ， 甲 车 的 速度 是 80 千米 / 时 ， 乙 车 的 速度 是 60 千米 / 时 ， 两车 相遇 时 甲 比 乙 多 行驶 了 280 千米 ， 相遇 时 甲乙 行驶 了 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9133", "content": "我校 三年级 有 4 个 班 ， 四年级 有 3 个 班 ， 三年级 每班 43 人 ． 四年级 每班 46 人 ． 三年级 和 四年级 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21351", "content": "2 月份 产 煤 420 吨 ， 比 一月份 的 80% 多 20 吨 ． 一月份 产 多少 煤 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2606", "content": "一 辆 运煤车 从 里面 量 长 2.5 米 、 宽 1.8 米 ， 装 的 煤 高 0.6 米 ， 平均 每 立方米 煤 重 1.5 吨 ， 这辆 车 装 的 煤 有 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "19964", "content": "一 个数 的 34 倍 比 3700 少 538 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1610", "content": "李 丽 读 一本 课外书 ， 第一天 读 了 10 页 ， 以后 每天 比 前一天 多 读 6 页 ， 最后 一天 读 了 52 页 ， 她 共 读 了 多少 天 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16889", "content": "六年级 一班 有 48 名 同学 ， 调查 会 游泳 和 会 骑 自行车 的 人数 ， 发现 每个 学生 至少 会 一样 ． 有 (7/12) 的 学生会 游泳 ， 有 (1/4) 的 学生 两样 都 会 ， 会 骑 自行车 的 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "1377", "content": "3 （ 1 ） 班 有 42 名 同学 ， 每人 都 至少 定 一份 报纸 ， 定 《 小学生 数学 报 》 的 有 32 人 ， 定 《 少年报 》 的 有 27 人 ， 至少 有 多少 人 两种 报纸 都 定 了 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7724", "content": "把 一块 大 圆饼 平均 分成 10 份 ， 吃 了 7 份 ， 吃 了 这块 饼 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2981", "content": "小 明 收集 的 名山 图片 占 60% ， 河流 图片 占 30% ， 名山 图片 比 河流 图片 多 90 张 ， 问 小 明 一共 收集 了 多少 张 图片 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17557", "content": "学校 买来 6 个 书架 ， 每个 书架 有 4 层 ， 每层 可以 放 35 本书 ， 这些 书架 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16482", "content": "笑笑 看 课外书 ， 第一天 看 全书 的 (1/10) ， 第 二 天 看 了 全书 的 (1/5) ， 还 剩 这 本书 的 几分 之 几 没 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3208", "content": "一 艘 客轮 原有 205 人 ， 中途 有 79 人 下船 ， 后来 又 有 128 人 上船 ． 再 开船 时 客轮 上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6266", "content": "池塘 的 4 周 栽 了 一圈 树 ， 每 两棵树 相隔 4 米 ， 甲 、 乙 两 人 同时 从 同 一棵树 出发 ， 反向而行 ， 相遇 时 甲 走 了 46 米 ， 乙 走 了 54 米 ， 则 这 圈 树 共有 多少 棵 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16782", "content": "被除数 是 8460 ， 除数 是 6 ， 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3494", "content": "一 项 工程 已经 完成 了 82% ， 还 剩下 多少 没有 完成 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12500", "content": "有 一根 木料 ， 用 (1/12) 小时 截 成 5 段 ， 如果 每 截 一次 所用 的 时间 相同 ， 那么 要 截 7 段 ， 一共 需要 多少 小时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1898", "content": "同学 们 到 河 的 一边 种树 ， 河岸 长 64 米 ， 每隔 4 米 种 一棵树 ， 两端 都 不 种 ， 共 需要 多少 棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18790", "content": "(4/5) + (1/5) * (4/7) = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3556", "content": "某 修路 对 修 一条 公路 ， 已修 了 42.5 千米 ， 剩下 的 比 已修 的 1.8 倍 少 8.5 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20020", "content": "一 张 长方形 彩色纸 长 6 厘米 ， 宽比 长短 2 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13251", "content": "一 绳子 长 30 米 ， 剪 去 (3/5) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22235", "content": "同学 们 参加 暑假 夏令营 ， 低年级 参加 夏令营 的 有 21 人 ， 高年级 参加 夏令营 的 人数 是 低年级 的 3 倍 ， 高年级 参加 夏令营 的 人数 比 低年级 多 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6134", "content": "公园 里 的 梨树 棵 树 是 樟树 棵 树 的 (3/4) ， 梨树 有 36 棵 ， 樟树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8570", "content": "仓库 有 面粉 120 袋 ， 第一天 运走 了 全部 的 (1/4) ， 第 二 天 运走 了 全部 的 (2/3) ， 还 剩下 多少 袋 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5710", "content": "100 千克 增加 25% 后 = 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6683", "content": "甲 每分钟 走 50 米 ， 乙 每分钟 走 60 米 ， 丙 每分钟 走 70 米 ． 甲 、 乙 两 人 从 a 地 ， 丙 一 人 从 b 地 同时 相向 出发 ， 丙 遇到 乙 后 2 分钟 又 遇到 甲 ， 求 a 、 b 两地 的 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "3284", "content": "星星 皮件厂 接到 缝制 1500 条 皮 裙 的 任务 ， 前 6 天 每天 缝制 75 条 ， 余下 的 要 在 15 天 内 全部 完成 ． 余下 的 平均 每天 缝制 多少 条 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17830", "content": "修 一条 路 ， 原 计划 15 天 完成 ， 实际 每天 修 300 米 ， 结果 提前 3 天 完成 ， 原 计划 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20610", "content": "一 条 路 长 100 米 ， 在 这 条 路 的 一边 每隔 4 米 栽 1 棵 树 （ 两端 都 栽 ） ， 共 可以 栽 多少 棵 树 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20238", "content": "丫丫 身高 1.35 米 ， 站 在 0.5 米 高 的 床上 比 丫丫 的 爸爸 高出 0.15 米 ， 爸爸 身高 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19787", "content": "一 项 工程 前 8 天 完成 了 它 的 (1/6) ， 照 这样 计算 ， 余下 的 还要 多少 天 完成 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4559", "content": "修 一条 路 1500 米 长 的 路 ， 原 计划 每天 修 50 米 ， 实际 每天 修 75 米 ， 实际 比 原 计划 提前 几天 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16165", "content": "10 千克 的 (5/8) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15144", "content": "收购站 收购 红枣 ， 上午 收购 了 900 千克 ， 下午 收购 了 1020 千克 ， 每 15 千克 装 一袋 ， 下午 比 上午 多 收购 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17459", "content": "小 红 住 的 这幢 楼 共 7 层 ， 每层 楼梯 20 级 ， 她 家住 在 5 楼 ， 你 知道 小 红 走 多少级 楼梯 才能 到 自己 住 的 那 一层 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17151", "content": "一 辆 自行车 500 元 ， 在 原价 基础 上 打 0.8 ， 小 明 有 贵宾卡 ， 还 可以 再 打 0.9 ， 小 明 买 这辆 车 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19126", "content": "一 个 三角形 的 面积 是 25 cm ^ 2 ， 和 它 等 底 等 高 的 平行四边形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10885", "content": "小 李 每天 工作 8 小时 ， 3 天 生产 零件 240 个 ， 平均 每 小时 完成 总数 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22960", "content": "厂 计划 本月 用电 100 度 ， 实际 用 了 80 度 电 ， 实际 比 计划 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20111", "content": "一 堆 煤 ， 第一次 运走 它 (1/4) ， 第 二 次 又 运走 140 吨 ， 这时 余下 的 煤 的 吨数 与 运走 的 吨数 的 比 是 2 ： 3 ． 这 堆 煤 原有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21694", "content": "买 14 本 同样 的 书 花 了 224 元 ， 书 的 单价 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8661", "content": "一 根 木棒 截下 (1/3) 正好 是 2 米 ， 再 减去 (3/8) 米 ， 还 剩 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2601", "content": "果园 里 有 890 棵 桃树 ， 是 梨树 的 5 倍 ， 果园 里 一共 有 多少 棵 果树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12246", "content": "少先队员 在 山坡 上 栽 的 松树 是 柏树 的 25% ， 松树 比 柏树 少 150 棵 ， 柏树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14357", "content": "一 种 电视机 ， 原来 每 台 10000 元 ， 现在 打 了 0.25 ， 现在 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1333", "content": "画画 小组 女生 有 8 人 ， 每位 女生 画 3 幅 画 ， 男生 有 7 人 ， 一共 画 了 20 幅 画 ． 这个 画画 小组 一共 画 了 多少 幅 画 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15713", "content": "做 一件 工作 ， 甲 要 (1/2) 小时 ， 乙 要 (1/3) 小时 ， 两 人 合作 需要 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6327", "content": "一 个数 除以 34 ， 商 是 17 ， 还 余 21 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2112", "content": "一 根 钢管 用 去 (2/3) 后 ， 还 剩 5 米 ． 这根 钢管 原来 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14499", "content": "小 丽 在 图书馆 借 了 一本 《 鲁滨逊 漂流记 》 ， 她 第一天 看 了 全书 的 15% ， 第 二 天 看 了 全书 的 25% ， 还 剩 144 页 没 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12711", "content": "小 红 有 本 科技 书 共 120 页 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 20% ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14945", "content": "修路 队 修 一条 长 765 米德 路 ， 修 了 8 天 后 还有 165 米 没 修 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7480", "content": "商店 运 来 124 箱 苹果 和 76 箱 桔子 ， 每箱 重 15 千克 ， 请 你 帮助 算 一 算 ， 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8223", "content": "某 地区 前年 降水量 是 540 毫米 ， 去年 降水量 比 前 年少 25% ， 这个 地区 去年 降水量 = 多少 毫米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15914", "content": "某 公园 原有 26 条 船 ， 每天 收入 910 元 ， 照 这样 计算 ， 现在 又 增加 了 6 条 船 ， 每天 一共 可以 收入 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21660", "content": "张 大爷 报摊 昨天 收入 230 元 ， 《 海峡 晚报 》 每份 0.5 元 ， 《 周报 》 每份 1.5 元 ， 《 周报 》 卖出 85 份 ， 《 海峡 晚报 》 卖出 多少 份 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15149", "content": "296 / 多少 = 24 … 8 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22537", "content": "胜利 小学 为 家长 准备 了 座位 28 排 ， 每排 9 个 ， 但 开 家长会 时 有 36 个 座位 空 着 ． 一共 有 多少 家长 来 参加 家长会 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11836", "content": "一 个 圆形 油桶 ， 底面 半径 是 2 分 米 ， 高 是 8 分 米 ， 它 的 体积 = ．", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "18439", "content": "火车 2 小时 行驶 94 千米 ， 照 这样 的 速度 ， 长沙 到 北京 的 铁路 长 1316 千米 ， 要 行驶 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3855", "content": "一 件 毛衣 现价 80 元 ， 比 原价 降低 了 (1/11) ， 这件 毛衣 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3497", "content": "一 种 西服 ， 去年 售价 400 元 ， 今年 的 售价 是 320 元 ， 今年 售价 比 去年 售价 降低 了 多少 ． （ 填 分数 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18960", "content": "冬冬 和 红红 分别 从 各自 家 出发 去 奶奶家 ． 冬冬 乘 大客车 ， 红红 坐 轿车 ． 大客车 的 速度 是 45 千米 / 时 ， 轿车 的 速度 是 55 千米 / 时 ． 两车 同时 从 两地 相对 开出 ， 2.5 小时 后 ， 冬冬 和 红红 同时 到 了 奶奶家 ． 你 能 算 出 两家 的 距离 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5893", "content": "商店 用 30 千克 酥糖 和 20 千克 水果糖 混合 成 什锦糖 ． 每千克 酥糖 8 元 ， 每千克 水果糖 3 元 ． 每千克 什锦糖 应 卖 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13831", "content": "某 小学 高年级 有 320 人 ， 占 全校 总 人数 的 (4/11) ， 低年级 是 全校 人数 的 25% ， 低年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3213", "content": "某 实验 小学 计划 投资 240 万元 建造 一个 科技馆 ， 实际 比 原 计划 节省 了 (1/6) ． 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1038", "content": "6 个 百 除以 3 ， 商 = 多少 个 百 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13041", "content": "某 果园 要 运 一批 水果 ， 用 3 辆 汽车 每次 共运 水果 7.5 吨 ． 照 这样 计算 ， 要 一次 运 完 25 吨 水果 ， 需要 几辆 汽车 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18867", "content": "已知 甲 、 乙 两 数 的 和 是 20.58 ， 甲 数 是 7.86 ， 乙 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3199", "content": "果园 里 有 100 棵 桃树 ， 正好 是 梨树 棵 数 的 (5/6) ， 梨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20070", "content": "绿化 小组 有 男生 25 人 ， 有 女生 20 人 ． 男生 的 人数 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21374", "content": "王师傅 生产 了 64 个 零件 ， 每 6 个 装 一盒 ， 已经 装 了 8 盒 ， 还 剩下 多少 个 没有 装 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5314", "content": "某 锅炉房 ， 原 计划 一个月 （ 按 30 天 计算 ） 烧煤 480 吨 ， 实际 每天 比 原 计划 少 烧 4 吨 ， 这样 原 计划 烧 一个月 的 煤 实际 可以 烧 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22424", "content": "一 条 高速路 长 336 千米 ． 一辆 客车 3.2 小时 行 完全 程 ， 一辆 货车 用 4 小时 行 完全 程 ． 客车 的 速度 比 货车 的 速度 快 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7093", "content": "一 辆 汽车 的 速度 为 60 千米 / 时 ， 是 自行车 速度 的 5 倍 ． 自行车 的 速度 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10214", "content": "我 在 计算 一道 除法 题 时 ， 把 除数 60 看成 了 90 ， 结果 是 20 ． 正确 的 结果 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1373", "content": "农机站 有 433 千克 柴油 ， 用 了 5 天 ， 平均 每天 大约 用 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3233", "content": "小 明 去 书店 买 了 20 本 数学 书 ， 摞 在 一起 有 120 厘米 高 ， 同样 的 另 一摞 书 高 24 厘米 ， 问 ： 这 摞 书 有 几本 ？ （ 列 综合 式 解答 ）", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21469", "content": "做 一根 长 2 米 ， 管 口 直径 0.15 米 的 圆柱形 白铁皮 通风管 ， 至少 需要 白铁皮 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8178", "content": "两个 因数 分别 是 204 和 5 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9683", "content": "鸡场 里 ， 公鸡 与 母鸡 的 比 是 2 ： 3 ， 公鸡 有 1000 只 ， 鸡场 里 共有 多少 只 鸡 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20832", "content": "6 和 一个 数 的 最大 公因数 是 3 ， 最小 公倍数 是 30 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7392", "content": "一 个 因数 是 77 ， 另 一个 因数 比 它 多 3 ， 它们 的 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22794", "content": "一 本 故事书 有 120 页 ， 第一天 读 了 全书 的 (1/4) ， 第 二 天 应从 第 多少 页 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18347", "content": "李 叔叔 买 了 5 块 香皂 ， 每块 1.56 元 ． 他 给 了 售货员 10 元 钱 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22956", "content": "服装厂 4 月份 上 半月 完成 生产 计划 的 (3/5) ， 下半月 完成 生产 计划 的 (5/8) ， 结果 比 计划 多 生产 了 360 件 ， 原 计划 加工 服装 多少 件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15587", "content": "市中心 体育馆 原来 有 58 排座位 ， 平均 每 排座位 可 坐 169 人 ， 扩建 后 ， 增加 35 排座位 ， 可以 多 坐 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18600", "content": "一 个 水池 装有 甲 、 乙 两个 出水管 ． 单 开 甲 管 ， (1/2) 小时 可以 把 满 池水 放 完 ； 单 开 乙 管 ， (1/3) 小时 可以 把 满 池水 放 完 ． 如果 两 管 齐 开 ， 多少 小时 可以 把 满 池水 放 完 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5690", "content": "一 桶 油 ， 用 掉 了 (1/5) ， 还 剩 280 千克 ， 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2240", "content": "a 、 b 两城 相距 832 千米 ， 甲 车 从 a 城 去 b 城 ， 每 小时 行 56 千米 ． 2 小时 后 ， 乙 车 从 b 城 开往 a 城 ， 每 小时 行 64 千米 ， 乙 车 出发 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7825", "content": "甲 、 乙 两地 相距 460 千米 ， 一列 客车 每 小时 行 60 千米 ， 一列 货车 每 小时 行 55 千米 ． 如果 两车 同时 从 两地 相对 开出 3 小时 后 ， 两车 还 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "23108", "content": "新兴 小学 盖 了 一幢 3 层 教学楼 ． 每层 10 个 教室 ， 买来 600 张 课桌 放在 这些 教室 里 ， 平均 每个 教室 放 多少 张 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3984", "content": "一 箱 芒果汁 饮料 有 6 瓶 ， 共 42 元 ， 小 亮 买 3 瓶 芒果汁 饮料 ， 需要 付 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17638", "content": "用 汽车 运 一堆 货物 ， 原 计划 每 小时 运 120 吨 ， 8 小时 运 完 ． 实际 每 小时 运 80 吨 ， 多少 小时 可以 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12883", "content": "{ [ （ □ / 2 - 3 ） * 4 - 5 ] + 6 ) ) * 7 = 63 ， □ = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "3971", "content": "300 分 米 是 5 分 米 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8145", "content": "东风 小学 师生 为 残疾人 捐款 3450 元 ， 其中 老师 捐款 1050 元 ， 低 、 中 、 高年级 捐款 的 钱 数 比 是 3 ： 4 ： 5 ， 高年级 捐款 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20401", "content": "小 明 家 在 银行存款 2000 元 ， 定期 一年 ， 按 年利率 2.25% 计算 ， 到期 后 他家 可 得到 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21070", "content": "李 晨 平均 每个 月 生活 支出 2400 元 ， 正好 占 他 月 收入 的 60% ． 李 晨 月 收入 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12040", "content": "冠捷 电子厂 一月份 原 计划 生产 液晶 显示屏 2500 台 ， 比 实际 少 生产 了 (1/6) ， 这个 厂 一月份 实际 生产 多少 台 的 液晶 显示屏 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16248", "content": "一 盘 苹果 的 (1/2) 是 4 个 ， 2 个 同样 的 盘子 里 共有 多少 个 苹果 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10988", "content": "两队 合 修 一条 路 ， 第一队 修 了 全长 的 40% ， 第 二 队 修 了 450 km ， 这时 两队 修 的 总 千米 数 比 全长 的 (2/3) 还 少 350 km ． 这 条 路 长 多少 km ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3731", "content": "80 * 16 * 25 * 125 = ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "3334", "content": "教师节 来临 之际 ， 水泊 商场 举行 “ 尊师重教 ” 活动 ． 一种 品牌 冰箱 原价 2700 元 ， 教师 购买 ， 可以 降价 (2/9) ． 请问 ， 你 的 语文 老师 如果 在 活动 期间 买 这种 冰箱 ， 可以 节约 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5070", "content": "要 铺设 一条 长 106.8 千米 的 公路 ， 甲队 平均 每天 铺 5.4 千米 ， 7 天 后 乙 队 一起 参加 铺路 ， 两队 合 铺 6 天 后 完成 任务 ， 乙 队 平均 每天 铺设 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18499", "content": "一 个 正方体 的 棱 长 为 6 厘米 ， 它 的 体积 为 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12563", "content": "一 件 上衣 原价 200 元 ， 打 0.8 出售 ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7526", "content": "小 陈 从 广州 开 直升飞机 去 上海 看 世博 ， 去 时 很 兴奋 ， 开 的 很快 ， 速度 为 150 千米 / 时 ， 回 时 很 累 ， 开 的 很 慢 ， 速度 只有 100 千米 / 时 ， 问 ： 小 胡 往返 广州 和 上海 的 平均速度 = ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1313", "content": "一 本 故事书 ， 我 每天 看 5 页 ， 看 了 9 天 ， 还 剩 64 页 ， 这 本书 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18412", "content": "有 18 米 布 ， 正好 裁成 5 件 大人 衣服 和 4 件 儿童 衣服 ． 每件 大人 衣服 用布 2.4 米 ， 每件 儿童 衣服 用布 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6202", "content": "6 一 儿童节 ， 学生 们 乘坐 一辆 旅游车 去 二 龙山 游玩 ． 汽车 在 平面 路段 和 上山 路段 各行 了 3 小时 ， 在 平原 一般 车速 是 80 千米 / 小时 ， 在 山区 一般 车速 是 40 千米 / 小时 ； 最后 到达 了 山顶 ． 这 段 路程 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21171", "content": "拖拉机 耕 一块 40 公亩 的 地 ， 上午 耕 了 它 的 (2/5) ． 余下 的 每 小时 耕 6 公亩 ． 还要 多少 小时 耕 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19259", "content": "一 堆 煤 ， 用 去 25 吨 ， 还 剩 15 吨 ， 剩下 的 煤 占 这 堆 煤 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2819", "content": "一 辆 汽车 每 小时 行驶 60 千米 ， 3 小时 共 行驶 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "129", "content": "某 厂 有 女职工 54 人 ， 占 全厂 职工 的 (9/14) ， 全厂 有 职工 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8204", "content": "325 减去 一个 数 的 (3/5) 的 差 是 25 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10518", "content": "张师傅 做 一批 机器 零件 ， 原 计划 每天 做 50 个 ， 6 天 完成 ． 实际 每天 多 做 10 个 ． 实际 每天 做 的 零件 占 这 批 零件 总数 的 几分 之 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19332", "content": "阳光 小学 为 增强 师生 的 身体素质 ， 买 了 10 个 篮球 和 50 跟 跳绳 ， 共用 去 950 元 ， 已知 每 根 跳绳 5 元 ， 每个 篮球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9889", "content": "一 批 水果 ， 第一天 卖出 (1/3) ， 第 二 天 卖出 72 千克 ， 这 剩 120 千克 ． 这 批 水果 共 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3752", "content": "王师傅 一天 加工 了 50 个 零件 ， 合格率 为 98% ， 合格 的 零件 有 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10199", "content": "已知 100 日元 兑换 人民币 8 元 ， 妈妈 用 2000 元 人民币 约 可兑换 多少 日元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4512", "content": "永丰乡 水稻 去年 总产量 是 780 吨 ， 比 小麦 总产量 多 20% ， 小麦 总产量 = 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18991", "content": "工程队 修 一条 长 5600 米 的 公路 ． 已经 修 了 260 米 ， 剩下 的 要 30 天 完成 ， 剩下 的 平均 每天 要 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11320", "content": "平行四边形 的 底 是 40 米 ， 高 时 25 米 ， 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13043", "content": "乙 数 比 丙 数 的 2 倍 少 3 ， 甲 数 是 乙 数 的 4 倍 ， 已知 甲 数 是 132 ， 求 丙 数 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8447", "content": "一 件 皮 衣服 ， 第一次 降价 了 20% ， 第 二 次 又 降价 了 15% ． 现在 这件 皮 衣服 的 价格 是 原价 的 多少 % ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15397", "content": "15 个 同学 要 去 河 对岸 ， 只有 一只 小 渡船 ， 船上 只能 乘 3 个 同学 ． 问 最少 用 几次 可以 全部 渡 完 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17632", "content": "5 （ 1 ） 班 有 男生 16 人 ， 女生 24 人 ， 男生 占 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20135", "content": "王 宏 把 一条 1 米 长 的 绳子 分成 3 段 ， 第一段 长 (1/8) 米 ， 第 二 段长 (3/8) 米 ． 第 3 段长 多少 米 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5420", "content": "白粉笔 比 红 粉笔 少 28 盒 ， 其中 白粉笔 是 红 粉笔 的 80% ， 红 粉笔 有 多少 盒 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "520", "content": "人类 目前 共 进行 了 123 次 的 探 月 活动 ， 成功 的 次数 占 (20/41) ， 探 月 活动 成功 了 多少 次 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5543", "content": "加工 一批 零件 ， 4 个人 做 ， 要 24 小时 完成 ． 那么 6 个人 做 ， 要 多少 小时 完成 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2370", "content": "动物园 有 游客 802 人 ， 中午 离去 186 人 ， 下午 又 来 了 349 人 ， 这时 动物园 里 有 游客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16867", "content": "小林 的 体重 去年 是 40 千克 ， 今年 增加 到 46 千克 ， 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "797", "content": "一 个数 乘 10 ， 得到 的 数 比 原来 的 数多 72 ． 原来 的 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1405", "content": "甲 、 乙 两地 相距 616 千米 ， 一辆 客车 和 一辆 货车 同时 分别 从 甲乙 两地 相向 开出 ， 经过 5.6 时 相遇 ， 客车 每 时 行 65 千米 ， 货车 每 时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9388", "content": "建筑工人 把 水泥 、 沙子 、 石子 按 2 ： 3 ： 5 的 比例 配制 一种 混凝土 ． 配制 8000 千克 这种 混凝土 ， 需要 水泥 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17455", "content": "蜜蜂 采 的 花蜜 中 含 蜜 30% ， 用 这种 花蜜 制成 含 蜜 72% 的 花蜜 6 千克 ， 只 需 这种 花蜜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22742", "content": "六年级 有 35 个 同学 要 拍 集体照 ， 价钱 是 23.5 元 ， 送 6 张 照片 ； 如果 另外 加洗 ， 每张 是 0.6 元 ， 如果 全班 每人 一张 ， 共 需要 付 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17020", "content": "某 厂 为 支援 玉树 抗震救灾 赶制 一批 帐篷 ， 第一天 生产 了 总数 的 (1/4) ， 第 二 天 生产 了 总数 的 (3/10) ， 两天 共 生产 了 880 顶 ． 这 批 帐篷 为 多少 顶 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22887", "content": "新 名 小学 新 买来 45 套 单人 课桌椅 ， 每张 课桌 125 元 ， 每 把 椅子 65 元 ， 买 课桌 比 椅子 多用 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22208", "content": "小 华 每分钟 走 58 米 ， 从 家 到 学校 要 走 11 分钟 ， 她家 到 学校 的 距 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7033", "content": "一 个 长方体 的 体积 是 96 立方分米 ， 底 面积 是 16 平方分米 ， 它 的 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "56", "content": "快 车长 182 米 ， 每秒 行 20 米 ， 慢 车长 1034 米 ， 每秒 行 18 米 ． 两车 同 向 并行 ， 当 两车 车头 齐 时 ， 快车 几秒 可 越过 慢车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15802", "content": "小 明 看 一本 200 页 的 故事书 ， 第一天 看 了 全书 的 20% ， 第 二 天 看 了 全书 的 35% ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11583", "content": "一 共有 72 吨 的 货物 ， 一辆 卡车 一次 能 运货 8 吨 ， 这 堆 货物 一共 要 运 几次 才能 运 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5481", "content": "要 加工 3400 个 玩具 ， 已经 加工 了 5 天 ， 每天 加工 408 个 ， 已经 加工 了 多少 个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2763", "content": "修 一条 公路 ， 已经 修 了 84.5 米 ， 比 剩下 的 多 3.5 米 ， 剩下 的 5 天 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16499", "content": "口袋 里 放入 12 个 球 ， 任意 摸 一个 球 ， 要 使 摸 到 红球 的 可能性 为 (2/3) ， 要 放入 多少 个 红球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15649", "content": "张 爷爷 用 5 米 长 的 竹竿 插入 水中 后 ， 进入 泥土 部分 是 0.8 米 ， 露出 水面 是 1.36 米 ， 鱼塘 水深 多少 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11907", "content": "调查 表明 ， 6 只 穿山甲 可以 消灭 42 公顷 林地 的 白蚁 ． 常青 林场 一号 林区 有 560 公顷 松林 ， 要 放养 多少 只 穿山甲 才能 使 树林 不 受 白蚁 伤害 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "776", "content": "公园 里 有 芍药花 20 盆 ， 是 菊花 盆 数 的 (1/4) ， 月季花 盆 数 又 是 菊花 盆 数 的 (3/4) ． 公园 里 有 月季花 多少 盆 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "49", "content": "甲乙 两车 相距 20 千米 ， 乙 车 在 前 ， 甲 车 在 后 ， 两车 同时 出发 ， 2 小时 后 甲 车 追 上 乙 车 ， 已知 乙 车 每 小时 行 50 千米 ， 甲 车 每 小时 行 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22366", "content": "小 玲 家 到 学校 的 路程 是 1200 米 ， 今天 ， 她 从 家 到 学校 ， 已经 行 了 全程 的 (7/10) ， 现在 小 玲 离家 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18221", "content": "3 台 碾米机 4.5 小时 碾米 4860 千克 ． 用 一台 这样 的 碾米机 要 碾米 10800 千克 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6095", "content": "一 个数 减少 它 的 20% 后 是 48 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10732", "content": "□ / 6 = 155 … 4 ， □ 应 填 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19268", "content": "小 红 看 一 本书 ， 第一天 看 了 全书 总 页数 的 (1/4) ， 第 二 天 看 了 12 页 ， 还 剩 27 页 没 看 ． 这 本书 一共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19588", "content": "某 厂 上半年 完成 产值 480 万元 ， 占 全年 产值 的 (3/5) ， 该厂 今年 全 产值 = 多少 万元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6770", "content": "周 西 小学 买 了 1 个 篮球 和 8 个 皮球 ， 正好 用 去 360 元 ， 皮球 的 单价 是 篮球 的 (1/4) ， 篮球 的 单价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1899", "content": "一 套 《 百科全书 》 的 价钱 是 65 元 ， 一套 连环画 的 价钱 是 它 的 (3/5) ， 一本 小说 的 价钱 又 是 一套 连环画 的 (2/3) ， 一本 小说 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14515", "content": "一 辆 卡车 行驶 1 千米 要 用油 (3/10) 千克 ， 10 辆 同样 的 卡车 行驶 500 千米 ， 要 用油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10042", "content": "学校 合唱队 ， 男生 有 12 人 ， 女生 的 人数 是 男生 的 6 倍 还 多 3 人 ， 问 学校 合唱队 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12332", "content": "一 个 小区 共有 15 栋 楼房 ， 每栋 有 120 户 人家 ， 这个 小区 共有 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4599", "content": "商店 运 来 一批 货物 ， 第一天 售出 23% ， 第 二 天 售出 27% ， 这时 还 剩 1100 吨 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2552", "content": "赵 佳 和 李 敏 的 画片 张 数 的 比 是 4 ： 5 ． 如果 赵 佳 有 32 张 画片 ， 李 敏 有 多少 张 画片 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17163", "content": "一 列 火车 从 甲地 开往 乙地 ， 行 了 全程 的 (3/5) ， 距 乙地 还有 600 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19962", "content": "一 个数 减去 0.2 与 这个 数 减去 0.02 ， 结果 相差 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3450", "content": "玩具厂 生产 了 1500 件 玩具 ， 合格率 是 95% ， 这 批 产品约 有 多少 件 次品 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20892", "content": "甲 、 乙 两地 相距 960 千米 ， 一辆 汽车 3 小时 正好 行 了 全程 的 (1/4) ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22390", "content": "一 个数 的 (1/5) 是 (1/2) ， 它 的 40% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11348", "content": "6 月 1 日 ， 坝 前 水位 在 海拔 75 米 高程 ， 15 天 后 ， 3 峡 水库 蓄水 至 135 米 高程 ． 算 一 算 平均 每天 水位 升高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13240", "content": "合唱队 有 28 名 男生 ， 女生 人数 是 男生 的 2 倍 ． 合唱队 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9038", "content": "红星 文具厂 接到 一批 生产 任务 ． 计划 每天 生产 120 件 ， 25 天 可以 完成 ． 实际 提前 5 天 就 完成 了 任务 ， 实际 每天 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12175", "content": "有 两根 绳子 ， 第一根 长 16.2 米 ， 是 第 二 根 长度 的 2 倍 ． 这 两根 绳子 共 长 多少 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21456", "content": "新华书店 运 来 故事书 、 文艺 书 、 科技 书 共 1200 本 ， 其中 故事书 占 总数 40% ， 文艺 书 占 总数 的 (1/3) ， 科技 书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3146", "content": "一 条 马路 的 一边 从头到尾 共 种 了 10 棵 树 ， 每 两棵树 之间 相隔 8 米 ， 这 条 马路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22290", "content": "东风 小学 今年 上 学期 购置 50 套 课桌椅 ， 桌子 每张 80 元 ， 椅子 每 把 25 元 ， 一共 要 用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15332", "content": "李师傅 做 一个 长 6 dm ， 宽 5 dm ， 高 4 dm 的 长方体 框架 ， 至少 需要 铁丝 多少 dm ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6944", "content": "一 个 玩具 博士帽 ， 上面 是 边长 7 厘米 的 正方形 ， 下面 是 底面 直径 4 厘米 ， 高 3 厘米 的 圆柱 ． 求 这个 博士帽 的 表面积 = ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "4394", "content": "小 明 计划 用 12 天 看 完 一本 240 页 的 故事书 ， 实际 每天 比 计划 多 看 4 页 ． 实际 看 完 这 本书 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2538", "content": "停车场 里 停放 着 两种 车 ， 其中 大卡车 有 24 辆 ， 小汽车 的 数量 是 大卡车 的 7 倍 ， 这个 停车场 里 一共 有 多少 辆车 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1549", "content": "1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "4996", "content": "学校 图书室 买来 200 本书 ， 要 放在 2 个 4 层 的 书架上 ， 平均 每层 要 放 几本 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6655", "content": "妈妈 用 100 元 去 买 了 一袋 28 元 的 饼干 ， 剩下 的 钱 买 了 每瓶 24 元 的 色拉油 ， 最 多 可以 买 几瓶 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16007", "content": "0.2 与 (1/6) 的 和 除 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6465", "content": "王老师 为 自己 班 38 名 学生 每人 买 了 一本 作文 辅导书 ， 一共 花 了 456 元 ． 李老师 也 想 为 自己 班 42 名 学生 每人 买 了 一本 这样 的 作文 辅导书 ， 需要 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18744", "content": "张 明 和 李 南 从 甲 、 乙 两地 同时 相对 而 行 ， 张 明 每分钟 走 70 米 ， 李 南 每分钟 走 60 米 ， 两 人 走 了 4 分钟 ， 还 相距 130 米 ， 甲 、 乙 两地 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14009", "content": "希望 小学 一年级 有 学生 68 人 ， 比 二年级 的 学生 数 少 (1/5) ， 二年级 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8221", "content": "水果店 运进 西瓜 (14/5) 吨 ， 运进 的 葡萄 比 西瓜 多 (1/4) ， 运进 的 葡萄 多 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6492", "content": "甲 数 是 60 ， 甲 数 是 乙 数 的 20% ， 甲 、 乙 两 数 的 和 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6411", "content": "今年 妈妈 36 岁 ， 小 明 年龄 是 妈妈 的 (1/3) ． 小 明 今年 多少岁 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6955", "content": "多少 的 2 倍 是 28.8 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2678", "content": "把 9 克 糖 放入 50 克 水中 ， 糖 占 糖水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2535", "content": "一 种 50 型 的 收割机 每天 收割 小麦 (4/25) 公顷 ， 10 天 收割 小麦 多少 公顷 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13508", "content": "某 数 的 (2/5) 比 4.8 的 2 倍 多 0.4 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11316", "content": "学校 组织 同学 们 去 秋游 ． 汽车 上午 8 时 从 学校 出发 ， 上午 11 时 到达 风景区 ， 每 时 行驶 45 千米 ． 学校 至 风景区 的 路程 有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19429", "content": "6 （ 1 ） 班 的 同学 计划 向 贫困山区 的 学生 汇款 500 元 ， 由 贝 贝 和丽丽 去 学校 对面 面 的 邮局 汇款 ， 汇款 的 汇率 是 1% ， 她俩 要 完成 此项 任务 至少 需 带 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6604", "content": "小 娟 从 家 到 学校 ， 每分钟 走 64 米 ， 10 分钟 可以 到达 ． 如果 她 要 8 分钟 到达 ， 那么 平均 每分钟 要 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3093", "content": "某 修路 队 计划 修路 10 千米 ， 已经 修 了 (1/2) 千米 ， 还 剩 多少 千米 没 修 完 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7842", "content": "一 个 因数 是 6 ， 另 一个 因数 是 3 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3641", "content": "口袋 里 有 8 个 白色 的 乒乓球 和 4 个 黄色 的 乒乓球 ， 现在 从中 摸 出 1 个 球 ， 是 白色 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "704", "content": "一 桶 油 重 15 千克 ， 倒 出 (1/2) ， 平均 装 到 8 个 瓶子 里 ， 每个 瓶子 装 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2168", "content": "我国 领土 辽阔 ， 南北 总长度 约 是 5500 千米 ， 这个 长度 比 我国 长城 全长 大约 少 (3/8) ， 我国 长城 全长 大约 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9579", "content": "停车场 有 56 辆 小汽车 ， 其中 的 (1/8) 是 进口车 ， 其余 是 国产车 ． 停车场 有 多少 辆 国产车 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8918", "content": "体育 队 有 17 人 ， 合唱队 有 45 人 ． 舞蹈队 的 人数 比 体育 队 和 合唱队 的 总 人数 少 4 人 ． 舞蹈队 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16410", "content": "某地 气象局 统计资料 表明 ， 高度 每 增加 1000 米 ， 气温 就 降低 大约 6 摄氏度 ， 现在 某 地面 气温 25 摄氏度 ， 高地 顶上 的 气温 是 - 5 摄氏度 ， 则 该 高地 的 高度 = 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7270", "content": "一 条 路 修 了 全长 的 (3/5) ， 还 剩 240 米 没有 修 ． 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3810", "content": "小 敏 攒 了 56 元 的 零用钱 ， 他 拿出 其中 的 (5/8) 捐给 云南 盈江 地震 灾区 的 小学 ， 小 敏 捐 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21582", "content": "一 堆 煤 有 140 吨 ， 运走 这 堆 煤 的 (5/7) ， 还 剩下 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20010", "content": "99 与 100 的 和 乘 它们 俩 的 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13595", "content": "长距离 飞行 最快 的 鸟 - - 雨燕 平均 每 小时 能 飞行 170 千米 ， “ 和平 天使 ” 信鸽 的 飞行速度 比 雨燕 慢 55% ， 信鸽 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11073", "content": "青草 晒干 后 重量 会 减少 (2/3) ， 现在 有 66 吨 青草 ， 晒干 后 剩下 干草 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10710", "content": "16 的 (5/12) 比 一个 数 的 7 倍 多 2 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18559", "content": "某 饭店 买来 白菜 和 萝卜 各 8 千克 ， 共 花 了 24.8 元 ． 白菜 每千克 0.8 元 ， 萝卜 每千克 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4579", "content": "甲 校 的 图书 是 乙 校 的 150% ， 甲 校 比 乙 校 的 图书 多 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "525", "content": "王 叔叔 开车 从 上海 运货 到 北京 用 了 10 小时 ， 货车 的 速度 是 42 千米 / 时 ， 返回 只用 了 7 小时 ， 货车 返回 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4201", "content": "新年 到 了 ， 家里 要 给 自己 的 孩子 压岁钱 ． 这 不 ， 小 红 已经 计划 了 压岁钱 该 怎么 花呢 ! 小 红 准备 将 压岁钱 的 (1/6) 用来 买 学习用品 ， (1/3) 用来 买 早餐 ， 剩下 的 钱 捐给 希望工程 ． 问 ： 捐给 希望工程 的 钱 占 压岁钱 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20291", "content": "甲 、 乙 两城 相距 680 千米 ， 从 甲 城 开往 乙 城 的 普通 客车 每 小时 行驶 60 千米 ， 2 小时 后 ， 快车 从 乙 城 开往 甲 城 ， 每 小时 行 80 千米 ， 快车 开出 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2093", "content": "小 明 看 一本 480 页 的 书 ， 已经 看 了 60% ， 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17859", "content": "甲 仓 存粮 80 吨 ， 比 乙 仓 多 存粮 (3/5) 吨 ， 乙 仓 存粮 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22088", "content": "被减数 减去 减数 ， 差 是 0.4 ， 被减数 、 减数 与 差 的 和 是 2 ， 减数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3842", "content": "一 桶 “ 金龙鱼 ” 色拉油 重 5 千克 ， 用 去 了 它 的 (3/4) ， 用 去 了 多少 千克 ？ 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11389", "content": "一 瓶 酱油 (2/5) 千克 ， 6 天 用 完 ， 平均 每天 用 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8242", "content": "一 个数 除以 8 ， 商 16 余 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14096", "content": "食堂 买来 面粉 (4/5) 吨 ， 用 去 (3/4) 吨 后 ， 又 买来 (3/8) 吨 ， 现在 食堂 有 面粉 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12223", "content": "一 电视机厂 要 生产 240 台 电视机 ， 前 2 小时 生产 了 96 台 ， 比 完成 余下 任务 少 用 了 0.4 小时 ． 完成 余下 的 任务 平均 每 小时 要 生产 电视机 多少 台 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22021", "content": "一 套 西装 ， 原价 2500 元 ， 打折 后 现在 售价 2000 元 ， 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6729", "content": "一 个 平行四边形 相邻 两边 分别 是 12 厘米 和 8 厘米 ， 其中 一条 边上 的 高 是 10 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5277", "content": "学校 舞蹈队 原有 28 人 ， 今年 有 12 人 离开 舞蹈队 ， 后来 又 新 加入 16 人 ， 现在 舞蹈队 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9217", "content": "一 本书 有 680 页 ， 小洋 第一天 看 了 328 页 ， 第 二 天 看 了 285 页 ． 这 本书 还有 多少 页 没 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12478", "content": "有 一堆 化肥 已 运走 25% ， 正好 运走 12 吨 ， 这 堆 化肥 还 剩下 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14760", "content": "洁 瓷 净 是 用 原液 和 水 按 1 ： 10 配制 而 成 的 ． 现有 80 毫升 原液 ， 需要 加水 多少 毫升 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13958", "content": "已知 两个 因数 的 积 是 91 ， 其中 一个 因数 是 14 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18721", "content": "李 玲 第一天 看书 40 页 ， 第 二 天 比 第一天 多 看 (1/5) ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16632", "content": "一 根 电线 ， 长 70 米 ， 重 15.4 千克 ， 现有 这种 电线 940 米 ， 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22359", "content": "学校 有 科技 书 150 本 ， 恰好 是 故事书 的 本 数 的 (3/4) ， 文艺 书 的 本 数 是 故事书 的 (5/8) ， 文艺 书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9664", "content": "某 渔船 一天 上午 捕鱼 1200 千克 ， 比 下午 少 (1/7) ， 全天 共 捕鱼 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13122", "content": "一 个 圆柱体 的 体积 是 282.6 立方分米 ， 底 面积 是 31.4 平方分米 ， 圆柱体 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19292", "content": "某班 学生 共 50 人 ， 其中 27 人 会 游泳 ， 会 体操 的 有 18 人 ， 游泳 、 体操 都 不会 的 有 15 人 ． 既 会 体操 又 会 游泳 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3781", "content": "小 英 读 一本 故事书 ， 第一天 读 了 全书 的 (3/8) ， 第 二 天 读 了 剩下 的 (2/5) ， 这时 还 剩 45 页 没有 读 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9139", "content": "六年级 有 190 名 学生 回校 ， 比 请假 的 多 90% ， 六年级 有 多少 人 请假 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7754", "content": "三年级 同学 为 庆祝 元旦 ， 9 个人 2 小时 叠 花 270 朵 ， 平均 每人 每 小时 叠 花 多少 朵 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4218", "content": "妈妈 去 菜场 带 了 30 元 钱 ， 买 肉用 了 15.8 元 ， 买菜 用 了 9.45 元 ， 还 剩下 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11304", "content": "一 种 电视机 原价 1200 元 ， 现在 每 台 只 卖 960 元 ． 降价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4890", "content": "小 明 将 过年 时 的 500 元 压岁钱 存入 银行 ， 存期 为 一年 定期 ， 年利率 是 2.25% ， 明年 小 明 可 得到 的 利息 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12154", "content": "在 直尺 上 从 3 厘米 到 12 厘米 = 多少 厘米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17539", "content": "一 个 农具厂 要 生产 4000 件 农具 ， 前 5 天 平均 每天 生产 500 件 ， 余下 的 要 在 2 天 内 完成 ． 平均 每天 应 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15166", "content": "水果 店里 有 苹果 600 千克 ， 梨 的 重量 相当于 苹果 的 (7/12) ， 橘子 的 重量 只有 梨 的 (4/5) ． 橘子 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9104", "content": "王 阿姨 买 苹果 和 梨 各 2 千克 ， 每千克 梨 2.8 元 ， 一 共用 了 10.4 元 ． 每千克 苹果 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18941", "content": "果园 里 有 桃树 150 棵 ． 梨树 的 棵 数 是 桃树 的 (2/3) ， 又 是 苹果树 的 (2/7) ． 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4305", "content": "2003 * 0.999 - 2004 * 0.998 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13189", "content": "某人 驾车 以 每 小时 20 千米 的 速度 行 了 90 千米 ， 返回 时 每 小时 行 30 千米 ， 其 全程 的 平均速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15866", "content": "小 明 植树 3 棵 ， 是 全班 植树 的 (1/25) ， 全班 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8552", "content": "有 15 袋 块 数 相等 的 水果糖 ， 如果 从 每 袋中 取出 12 块 ， 剩下 水果糖 的 总 块 数 恰好 等于 原来 13 袋 糖 的 块 数 ． 原来 每 袋 糖 有 多少 块 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6026", "content": "一 个数 比 50 的 (9/25) 多 4.5 ， 求 这个 数 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14249", "content": "“ 6 • 一 ” 期间 ， 某 商场 举行 优惠活动 ， 一套 衣服 打 0.8 销售 ， 这 套 衣服 原价 是 200 元 ， 现在 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22811", "content": "一 只 大象 奔跑 的 速度 是 45 千米 / 时 ， 猎豹 的 速度 比 它 速度 的 2 倍 还 多 0.3 千米 ， 猎豹 奔跑 的 速度 = 多少 千米 / 时 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6837", "content": "同学 们 参加 暑期 夏令营 ． 低年级 有 28 人 参加 ， 高年级 的 人数 比 低年级 的 17 倍 还 多 16 人 ． 如果 每 13 人 合住 一顶 帐篷 ． 那么 低年级 、 高年级 的 同学 们 共 需要 架 多少 顶 帐篷 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2023", "content": "一 个数 的 (3/5) 是 (1/5) ， 这个 数 的 50% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "89", "content": "某班 存放 科技 书 150 本 ， 故事书 比 科技 书 的 2 倍 少 50 本 ， 故事书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9", "content": "王 叔叔 开车 从 甲地 去 乙地 ， 以 70 千米 / 时 的 速度 行 了 6 小时 才 到达 ． 返回 时 由于 有 任务 ， 加快 了 速度 ， 只用 了 4 小时 就 回到 了 甲地 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4", "content": "从 甲地 到 乙地 ， 如果 骑 自行车 每 小时 行驶 16 千米 ， 4 小时 可以 到达 ， 如果 乘 汽车 只 需要 2 小时 ， 汽车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3214", "content": "有 一个 2 米 深 的 圆形 水池 ， 半径 是 6 米 ， 现在 想 把 水池 底面 与 周边 用 瓷砖 贴 满 ， 贴 上 瓷砖 面 的 面积 = ？", "knowledge": ["*", "+", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "8595", "content": "小 明 有 34 个 红球 ， 28 个 黄 球 和 76 个 白 球 ． 小 明 一共 有 多少 个 球 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8115", "content": "9 / 0.45 的 商 加上 0.81 的 15 倍 ， 结果 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21290", "content": "计算 ： 76 - 23 - 17 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3203", "content": "86 与 59 的 差 去除 2835 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12720", "content": "甲 数 的 32% 相当于 乙 数 的 (4/5) ， 甲 数 是 40 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9236", "content": "小 明 今年 5 岁 ， 爸爸 今年 35 岁 ． 明年 爸爸 的 年龄 是 小 明 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "305", "content": "工程队 挖 一条 水渠 ， 第一天 挖 了 全长 的 (3/8) ， 第 二 天 挖 了 全长 的 40% ， 两天 共 挖 了 186 米 ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16312", "content": "校园 里 有 3 种树 ， 已知 杨树 有 80 棵 ， 占 总 棵 数 的 (2/9) ， 松树 与 柳树 的 棵 数 比 为 3 ： 4 ． 校园 里 有 松树 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11923", "content": "一 台 碾米机 30 分钟 碾米 50 千克 ， 照 这样 计算 ， 碾 1 千克 米 要 用 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8186", "content": "某种 品牌 的 电脑 降价 20% 后 ， 每 台 售价 为 4592 元 ， 则 该 品牌 电脑 降价 前 每 台 售价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9788", "content": "同学 们 去 游 公园 ． 三年级 去 了 86 人 ， 四年级 比 三年级 多 去 18 人 ， 五年级 去 的 人数 是 3 、 四年级 总 人数 的 2 倍 ． 五年级 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5192", "content": "一 辆 客车 和 一辆 货车 同时 从 相距 414 千米 的 两地 出发 ， 相向 而 行 ， 经过 3.6 小时 相遇 ． 客车 每 小时 行 60 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16733", "content": "用 木板 做 6 个 陈列 箱 ， 除 它 的 正面 用 玻璃 外 ， 其余 各 面 都 用 木板 ． 已知 陈列 箱 长 2 米 ， 宽 0.5 米 ， 高 1.5 米 ， 共 需要 木板 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.6, "length": 15}
-{"question_id": "16645", "content": "一 本书 ， 第一天 看 了 它 的 (1/3) ， 第 二 天 看 了 剩下 的 (1/2) ， 还 剩 20 页 没有 看 ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8659", "content": "某 物体 的 质量 等于 它 的 75% 再 加上 (3/4) 千克 ． 这个 物体 的 质量 = 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15651", "content": "小 华 看 一本 故事书 ， 第一天 看 了 全书 的 15% ， 第 二 天 看 了 48 页 ， 还 剩 全书 的 45% 没有 看 ， 小 华 第一天 看 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8920", "content": "口袋 中 有 大小 、 材质 相同 的 红球 3 个 ， 白 球 4 个 和 黑 球 5 个 ， 要 想 使 从中 摸 出 一个 红球 的 可能性 是 (1/2) ， 应该 再 往 口袋 中 放 多少 个 红球 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "3442", "content": "小学生 每天 在校 时间 为 6 小时 ， 其中 ， 体育 活动 时间 占 在校 时间 的 (1/6) ， 读书 时间 占 (1/8) ， 两项 活动 时间 共 占 在校 时间 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19631", "content": "学校 图书馆 买来 故事书 2400 本 ， 连环画 比 故事书 少 买 (3/8) ， 故事书 和 连环画 一共 买 了 多少 本 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9126", "content": "苹果 和 梨 共 重 2680 千克 ， 苹果 每 50 千克 装 一筐 ， 共 装 28 筐 ， 梨 40 千克 装 一筐 ， 梨 要 装 多少 筐 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22302", "content": "同学 们 参加 军训 会操 ， 原来 每行 20 人 ， 可以 站 24 行 ； 队形 变化 后 ， 每行 多 站 10 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20714", "content": "甲 、 乙 两 数 的 和 是 48.7 ， 乙 数 是 27.98 ， 甲 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4089", "content": "甲 、 乙 两 人 合作 生产 一批 零件 ， 甲 每 小时 做 20 个 ， 做 了 2.5 小时 ， 乙 每 小时 做 22 个 ， 做 了 3 小时 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4514", "content": "李 叔叔 买 了 一台 电脑 ， 价格 优惠 ， 是 原价 的 0.85 ， 比 打折 前 便宜 了 300 元 ， 李 叔叔 买 这 台 电脑 花 了 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13424", "content": "红 从 家里 到 小 英 的 家 ， 途中 必须 过 学校 门口 ． 一天 放学 ， 两 人 同时 从 学校 门口 出发 各自 回家 ． 如果 小 红 每分钟 走 58 米 ， 小 英 每分钟 走 62 米 ， 经过 9 分钟 小 红 回到 了 家 ， 但 小 英 还 在 走 150 米 才 回到 家 ． 那么 ， 小 红 家 到 小 英 家 的 路程 共有 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21122", "content": "将 20 克 糖 放入 白开水 中 制成 糖水 ， 这种 糖水 浓度 为 10% ， 需 白开水 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13959", "content": "一 根 电线 长 10 米 ， 第一次 剪 去 全长 的 (1/5) ， 第 二 次 剪 去 剩下 的 (1/8) ． 这根 电线 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "2603", "content": "今年 植树节 ， 向阳 小学 4 至 六年级 的 同学 一共 栽 了 704 棵 杨树 和 64 棵 松树 ， 栽 的 杨树 是 松树 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15417", "content": "叔叔 比 小 明 大 20 岁 ， 明年 叔叔 的 年龄 是 小 明 的 3 倍 ． 小 明 今年 多少岁 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "549", "content": "一 堆 煤 计划 每天 运 15 吨 ， 8 天 可以 运 完 ， 如果 每天 只 运 计划 的 (2/3) ， 那么 几天 才能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7641", "content": "某 运输队 计划 用 3 天 时间 运 一批 货物 ， 第一天 运 这 批 货物 的 (1/3) ， 第 二 天运 这 批 货物 的 50% ， 还 剩下 120 吨 没 运 ， 这 批 货物 一共 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20577", "content": "某 机器厂 去年 6 月份 生产 机器 528 台 ， 比 计划 多 28 台 ． 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4681", "content": "货车 以 65 千米 / 时 的 速度 从 甲 城 往 乙 城 装 货物 ， 4 小时 到 乙 城 ， 回来 用 了 5 小时 ， 货车 回来 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21475", "content": "把 一个 棱 长 为 20 分 米 的 正方体 分成 两个 相同 的 长方体 ， 表面积 增加 了 多少 dm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14022", "content": "操场上 有 408 名 学生 ， 老师 的 人数 是 学生 人数 的 (1/8) ． 操场上 师生 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "320", "content": "把 30 克 盐 放入 670 克 水中 ， 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3128", "content": "一 部 电视片 全长 390 分钟 ， 播出 6 集 后 还 剩 120 分钟 ． 平均 每集 长 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3435", "content": "一 辆 汽车 ， 如果 分期付款 ， 要 加价 7% ， 如果 一次性 付款 ， 可 按 0.95 优惠 ． 王 叔叔 算了算 ， 分期付款 比 一次性 付款 要 多付 7200 元 ． 这辆 车 的 售价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8395", "content": "粮库 现有 一批 大米 ， 运出 (2/5) 后 ， 又 运 来 45 吨 ． 这时 库里 的 大米 比 原来 大米 的 75% 还 多 3 吨 ． 库里 原有 大米 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2702", "content": "2013 年 1 月 ， 一年 定期 的 年利率 是 4.25% ， 李 明 当时 存 了 4000 元 ， 如果 利息税 为 20% ， 到期 时 可 得 利息 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "11129", "content": "小 明 看 一本 312 页 的 故事书 ， 每天 看 12 页 ， 看 了 6 天 ， 剩下 的 还要 看 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4845", "content": "学校 有 一个 圆形 花坛 ， 直径 5 米 ， 这个 花坛 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8387", "content": "停车场 有 28 辆 小汽车 ， 小汽车 比 大客车 多 (1/6) ， 大客车 有 几辆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20954", "content": "一 本书 先 看 了 15 页 ， 又 看 了 全书 的 (1/3) ， 还 剩下 全书 的 (1/4) ， 这本 有 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16027", "content": "每 台 冰箱 的 价钱 降低 了 10% ， 也 就是 现在 的 价钱 是 原来 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17852", "content": "一 辆 火车 上 原有 967 人 ． 先 下去 288 人 ， 后来 又 上来 105 人 ． 火车 上 现在 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9172", "content": "甲乙 两地 相距 850 千米 ， 一辆 轿车 从 甲地 开往 乙地 ， 以 95 千米 / 时 的 速度 行 了 5 时 ， 离 乙地 还有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1754", "content": "学校 买来 15 只 排球 各 23 只 足球 ， 共用 去 350 元 ． 每 只 足球 8.5 元 ， 排球 每 只 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17581", "content": "两座 大楼 门口 相距 300 米 甲乙 两 人 各 从 其中 一座 大楼 门口 出发 ， 同时 向 相反 的 方向 走 去 ， 7 分钟 后 两 人 相距 860 米 ， 甲 分钟 走 37 米 ， 乙 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16469", "content": "楼上 有 8 排座位 ， 每排 有 35 个 座位 ， 楼下 有 372 个 座位 ， 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19713", "content": "某种 上衣 每件 85 元 ， 服装店 一次 购进 这种 上衣 2 箱 ， 每箱 20 件 ， 一 共用 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20380", "content": "一 个数 乘 3 ， 减 8 ， 除以 2 ， 最后 加上 4 ， 结果 等于 9 ． 这个 数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21136", "content": "甲乙 两城 间 的 公路 长 150 千米 ， 一辆 汽车 从 甲 城 开往 乙 城 ， 行 了 全程 的 (3/5) ， 汽车 离开 甲 城 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4613", "content": "公园 里 有 月季花 90 棵 ， 正好 是 郁金香 的 (3/4) ， 兰花 的 棵 数 是 郁金香 的 (5/6) ， 兰花 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8349", "content": "21 * 4 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14849", "content": "小 华 家 先后 买 了 两批 小鸡 ． 第一批 的 20 只 每 只 重 60 克 ， 第 二 批 的 30 只 每 只 重 70 克 ． 小 华 家 的 小鸡 平均 多重 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9019", "content": "育才 小学 四年级 有 4 个 班 ， 每班 52 人 ， 五年级 有 3 个 班 ， 每班 55 人 ， 四年级 和 五年级 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13207", "content": "服装厂 要 做 1800 套 服装 ， 原 计划 12 天 完成 ， 实际 提前 2 天 就 完成 了 任务 ， 实际 每天 比 计划 多 做 了 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8177", "content": "修 一条 公路 ， 已经 修 了 200 米 ， 已修 的 和 剩下 的 长度 比 是 2 ： 3 ． 这 条 公路 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9944", "content": "化肥厂 计划 每月 用水 1080 吨 ， 由于 节水 抗旱 ， 实际 每月 比 计划 节约 10% ， 实际 每月 用水 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17252", "content": "小 明 原 计划 12 天 看 一本 240 页 的 故事书 ， 实际 每天 比 原 计划 多 看 10 页 ． 实际 看 完 这 本书 需 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20294", "content": "学校 图书室 的 故事书 比 科技 书 少 15% ， 故事书 是 科技 书 的 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10545", "content": "果园 里 有 428 棵 桃树 ， 梨树 比 桃树 少 180 棵 ， 果园 里 一共 有 多少 棵 树 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10109", "content": "一 根 电话线 用 去 (5/8) 后 ， 还 剩 6 米 ． 这根 电话线 原来 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3287", "content": "老师 在 一个 空 粉笔 盒里 放入 了 2 根红 粉笔 和 3 根 白粉笔 ， 任意 拿出 一根 ， 拿到 红 粉笔 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3967", "content": "多少 的 25 倍 是 500 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12687", "content": "往 一只 空 篮子 里 放 鸡蛋 ， 篮子 里 的 鸡蛋 数 每分钟 增加 1 倍 ， 放 了 12 分钟 ， 篮子 里 刚好 放满 鸡蛋 ． 什么 时候 鸡蛋 刚好 放到 半 篮 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21673", "content": "小 研 看 一本 162 页 的 书 ， 3 天 看 了 54 页 ， 问 多少 天 能 看 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12255", "content": "2 ， 1 ， 3 ， 4 ， 7 ， 多少 ， 18 ， 29 ， 47 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18775", "content": "小 明 从 家 到 学校 走 了 800 步 ， 他 每 步长 0.45 米 ． 小 明 家 到 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22326", "content": "农具厂 要 生产 2400 件 家具 ， 已知 生产 了 6 天 ， 每天 生产 250 件 ， 剩下 要 3 天 完成 ， 每天 要 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6283", "content": "东升 小学 十 月份 用水 285 吨 ， 比 9 月份 多用 30 吨 ， 这 所 小学 两个 月 共 用水 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14175", "content": "在 一个 口袋 中 有 10 个 黑 球 、 6 个 白 球 、 4 个 红球 ． 问 ： 至少 从中 取出 多少 个 球 ， 才能 保证 其中 有 白 球 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15594", "content": "32 * 33 * 34 + 64 * 66 * 68 + 96 * 99 * 102 + 128 * 330 * 331 = ．", "knowledge": ["*", "+"], "difficulty": 1.0, "length": 23}
-{"question_id": "20953", "content": "甲 数 是 乙 数 的 (3/4) ， 乙 数 是 丙 数 的 (1/5) ， 如果 丙 数 是 40 ， 则 甲 数 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2056", "content": "小 明 做 数学 作业 用 去 0.15 小时 ， 做 语文 作业 用 去 了 0.6 小时 ， 他 完成 这两项 作业 共用 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20431", "content": "某 乡 新建 一座 占地面积 为 125 平方米 的 温室 ， 全部 用于 栽种 花菜 ． 如果 每平方米 可 产 花菜 15 千克 ， 以 每千克 2.4 元 价格 售出 ， 那么 一共 可 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6351", "content": "运输 公司 要 将 268 吨 物资 运送 到 某地 ， 其中 的 60% 用 货船 运输 ， 其余 的 用 火车 运 ， 用 火车 运送 的 物资 比 用 船 运送 的 物资 少 多少 吨 ？ 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20671", "content": "一 辆 汽车 从 甲地 到 乙地 ， 去 时 的 速度 是 64 千米 / 时 ， 共用 了 5 小时 ， 返回 时 只用 了 4 小时 ， 这辆 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4370", "content": "小 翔 从 家 步行 到 超市 ， 步行 8 分钟 后 还 剩 全程 的 (1/3) ． 小 翔 平均 每分钟 步行 全程 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6806", "content": "把 一个 长 为 10 厘米 、 宽 为 8 厘米 的 活动 式 长方形 ， 拉 成 一个 一条 高 为 9 厘米 的 平行四边形 ， 拉 成 的 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12240", "content": "一 件 商品 原来 售价 618 元 ， 降价 后 为 309 元 ． 降价 后 的 商品 按 原价 的 百分之几 出售 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1016", "content": "有 24 箱 重量 相等 的 梨 ， 如果 从 每箱 取出 11 千克 ， 那么 剩下 的 梨 正好 等于 原来 16 箱 的 重量 ， 原来 每箱 有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15675", "content": "小 华 买 了 3 条 不同 的 裤子 ， 5 件 不同 的 上衣 和 2 双 不同 的 鞋 ， 他 一共 有 多少 种 不同 的 搭配 方式 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5318", "content": "小 芳 家 到 学校 有 630 米 ， 她 走路 的 速度 是 70 米 / 分 ， 小 芳 走路 到 学校 需要 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1531", "content": "计算 65 + 360 / （ 20 - 5 ） 时 ， 应 先 算 多少 法 ， 然后 算 多少 法 ， 最后 算 多少 法 ， 结果 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11170", "content": "食品厂 运到 核桃 9000 千克 ， 用 去 135 筐 以后 还 剩 900 千克 ， 每 筐 核桃 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1539", "content": "小 营 村 有 一批 菠萝 ， 每 筐 装 30 千克 ， 要 装 40 筐 ． 如果 每 筐 装 25 千克 ， 比 原来 多 要 几个 筐 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13414", "content": "学校 组织 三年级 同学 去 春游 ， 准备 了 9 箱 矿泉水 ， 每箱 24 瓶 ， 如果 把 它们 平均 分给 2 个 班 ， 每班 可 分 得 多少 瓶 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1635", "content": "a 、 b 两个 车站 相距 240 千米 ， 一 公共汽车 从 a 站 开出 ， 每 小时 行驶 48 千米 ， 一 小轿车 从 b 站 开出 ， 每 小时 行驶 72 千米 ． 小轿车 从 b 站 开出 1 小时 后 ， 客车 从 a 站 开出 ， 两车 相向 而 行 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14019", "content": "小 虎 早上 从 家 到 学校 上学 ， 要 走 1.3 千米 ， 他 走 了 0.3 千米 后 发现 没有 带 数学 作业本 ， 又 回家 去取 ， 这样 他 比 平时 上学 多 走 多少 千米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22985", "content": "一 幢 楼房 ， 每 上 一层楼 要 爬 23 级 台阶 ， 张老师 家 在 7 楼 ， 他 从 一楼 到 自己 家 ， 一共 要 爬 多少级 台阶 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3776", "content": "清明节 假期 ， 妈妈 带 小 明 去 爬山 ， 从 山脚 到 山顶 有 360 米 ， 他们 上山 用 了 3 小时 ， 下山 用 了 2 小时 ， 他们 上 下山 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1608", "content": "春节 快 到 了 ， 某 超市 购进 850 只 小 中国 节 ， 比 购进 的 大 中国 结 的 3 倍 少 50 只 ， 超市 购进 多少 只 大 中国 结 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22792", "content": "小 红 读 了 一本 故事书 ， 第一天 读 了 这 本书 的 (2/5) ， 第 二 天 读 了 45 页 ， 还 剩下 15 页 没有 读 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10249", "content": "甲 比 乙 多 (2/5) ， 乙 比 甲 少 多少 ． （ 判断 对错 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14697", "content": "李 叔叔 带 820 元 买 化肥 ． 买 了 12 袋 化肥 ， 剩 4 元 ， 每 袋 化肥 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16070", "content": "(2/3) * (5/6) * (6/7) = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19041", "content": "张师傅 每 小时 织 (2/5) 米 的 毯子 ， 织 (2/3) 米 长 的 毯子 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11848", "content": "一 个数 的 4 倍 是 204 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19316", "content": "刘老板 打算 把 一箱 梨 按 个 卖 ， 每个 梨 价钱 一样 ， 预计 一箱 可 得 120 元 ， 可是 烂 了 10 个 ， 他 只 卖 得 了 100 元 ． 这 箱 梨 有 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9699", "content": "修路 队 修 一条 公路 ， 已修 的 是 未 修 的 3 倍 ， 有 120 米 没 修 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19952", "content": "李 大叔 家养 160 只 鹅 ， 比 养 的 鸭 少 40 只 ， 养 的 鸡 是 鹅 和 鸭 总 只 数 的 5 倍 ． 李 大叔 家 养鸡 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21049", "content": "某班 一次 数学考试 中 ， 平均 成绩 是 78 分 ， 其中 男生 的 平均分 是 77 分 ， 女生 的 平均分 是 81 分 ， 这个 班 男生 人数 是 女生 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17072", "content": "小林 家 买 了 4000 元 国家 建设 债券 ， 定期 5 年 ， 年利率 4.85% ， 到期 可 获得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18040", "content": "实验 小学 共有 28 个 班 ， 每班 人数 相等 ． 3 年 一班 有 男生 21 人 ， 女生 11 人 ， 实验 小学 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18708", "content": "盐水 中 有 3 克 盐 和 100 克 水 ， 如果 再 加 2 克 盐 ， 那么 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6559", "content": "15 加上 一个 数 的 40% ， 正好 等于 20 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6703", "content": "一 堆 货物 16 吨 ， 用 去 (3/4) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22675", "content": "小 红 给 花园里 的 小树 浇水 ， 一共 有 9 棵 小树 ， 早上 小 红 已经 浇 了 3 棵 ， 小 红 早上 浇 了 所有 小树 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17834", "content": "做 一个 底面 直径 4 分 米 ， 高 5 分 米 的 圆柱 铁皮 通风管 ， 需 铁皮 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7243", "content": "体育老师 买 回 了 3 个 足球 ， 他 给 售货员 100 元 ， 找回 了 4 元 ， 请 你 算 一 算 每个 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15962", "content": "班上 共有 男生 23 人 ， 女生 27 人 ， 每人 交 课本费 37 元 ， 一共 要 交 多少 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21842", "content": "每个 同学 发 5 本 练习本 ， 三年级 一班 共有 52 个 同学 ， 一共 要 发 多少 本 练习本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21520", "content": "4 * 70 再 减去 28 得 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12623", "content": "一 件 上衣 原价 120 元 ， 现在 打 0.8 销售 ， 这件 上衣 便宜 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7762", "content": "两辆 汽车 ， 甲 车 每 小时 行驶 80 千米 ， 比 乙 车 慢 (1/3) ， 乙 车 每 小时 行驶 几千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3175", "content": "一 个数 的 5 倍 是 905 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1810", "content": "工程队 修 一条 公路 ， 第一天 修 了 400 米 ， 第 二 天 修 的 是 第一天 修 的 1.5 倍 ， 两天 一共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10923", "content": "在 100 克 水中 加入 10 克 盐 ， 这时 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10433", "content": "商店 运 来 15 箱 毛巾 ， 每箱 有 10 包 ， 每包 有 20 条 ， 这个 商店 共运 来 多少 条 毛巾 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21536", "content": "在 “ 迎 奥运 ” 植树 活动 中 ， 希望 小学 六年级 同学 植树 84 棵 ， 五年级 植树 的 棵 数 是 六年级 的 (6/7) ． 五年级 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12098", "content": "王老师 买 4 个 篮球 和 6 个 足球 的 总价 一样 多 ， 已知 每个 足球 80 元 ． 篮球 每个 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17411", "content": "某 厂 3 天 共 节约 煤 8.4 吨 ， 照 这样 计算 ， 再 工作 5 天 ， 共 节约 煤 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9197", "content": "服装厂 计划 4 月份 生产 西服 1500 件 ， 结果 上 半月 便 完成 了 65% ， 照 这样 计算 ， 全 月 超过 计划 产量 多少 件 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18621", "content": "一 个数 加 234 等于 800 ， 这个 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7060", "content": "一 辆 汽车 以 80 km / h 的 速度 从 甲地 运送 货物 乙地 ， 5 小时 到达 乙地 后 马上 返回 ， 返回 时 由于 是 空车 ， 速度 加快 25% ， 但 中途 汽车 抛锚 ， 停下 维修 了 1 个 小时 ， 问 从 离开 甲地 到 返回 甲地 一共 花 了 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1771", "content": "图书室 有 图书 1200 本 ， 借出 40% ， 还 剩 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10834", "content": "有 一根 钢管 ， 要 锯 成 16 小 段 ． 每 锯开 一处 需要 3 分 ， 全部 锯 完 一共 要 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21045", "content": "书店 运 来 一批 故事书 ， 第一天 卖 了 30% ， 第 二 天 卖 了 (1/2) ， 比 第一天 多 卖 60 本 ， 书店 运 来 的 这 批 故事书 一共 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1254", "content": "李 阿姨 游 3 峡 买 了 6 件 同样 的 旅游 纪念品 ， 王 叔叔 也 买 了 8 件 这种 旅游 纪念品 ． 王 叔叔 比 李 阿姨 多 花 了 24 元 ， 每件 旅游 纪念品 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5082", "content": "甲 仓库 有 粮食 180 千克 ， 乙 仓库 的 粮食 比 甲 仓库 多 可 (2/9) ． 乙 仓库 有 粮食 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18443", "content": "王师傅 本月 的 应 纳税 所得额 是 640 元 ， 如果 按 3% 的 税率 缴纳 个人所得税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1615", "content": "一 本 故事书 有 126 页 ， 已 看 页数 与 未 看 页数 的 比 是 4 ： 5 ， 这本 故事书 还 剩 多少 页 没 看 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21550", "content": "有 红 、 黄 、 黑 、 白 、 蓝 5 种颜色 的 小旗 若干 ， 每 面 小旗 一种 颜色 ． 任 取 其中 3 面 小旗 排成 一行 表示 信号 ， 问 共 可 表示 多少 种 不同 的 信号 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9200", "content": "一 本 故事书 ， 陈 洋 7 天 看 完 ． 他 平均 每天 看 这 本书 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22999", "content": "长沙市 城市 建设 日新月异 ． 1949 年 时 ， 长沙市 城区 面积 只有 6.75 平方千米 ， 经过 五十多年 的 发展 ， 城区 面积 已经 扩大 到 原来 的 28 倍 ， 现在 的 长沙市 城区 面积 有 多 大 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18173", "content": "2005 年 ， 买 一张 从 呼和浩特 到 北京 的 车票 是 204 元 ， 比 原价 增加 了 20% ， 原价 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1062", "content": "海洋公园 的 门票 是 130 元 ， “ 6 一 ” 期间 0.8 优惠 ， 购买 一张 门票 能 省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4022", "content": "一 节 课 的 时间 是 (2/3) 小时 ， 做 实验 的 时间 占 了 (3/5) ， 做 实验 用 了 多少 小时 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14091", "content": "甲乙 两个 建筑队 原有 水泥 的 重量 比 是 3 ： 2 ， 当 甲队 给 乙 队 54 吨 水泥 后 ， 甲乙 两队 水泥 的 重量 相等 ． 甲队 原来 有 多少 吨 水泥 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6873", "content": "妈妈 加工 一批 玩具 ， 白天 加工 了 (2/5) ， 晚上 加班 完成 了 45 个 ， 正好 完成 了 任务 的 50% ， 这 批 玩具 一共 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9742", "content": "一 种 农药 ， 药 和 水 按 1 ： 100 配成 ， 配成 这种 农药 202 千克 ， 需水 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4520", "content": "修路 队 修 一条 公路 平均 每天 修 175 米 ， 已经 修 了 12 天 ， 还有 350 米 ， 没有 修 完 ， 问 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1360", "content": "一 个 服装厂 原来 做 一种 儿童服装 ， 每套 用布 2.2 米 ， 现在 改进 了 裁剪 方法 ， 每套 节省 0.2 米 ， 原来 做 300 套 这种 服装 所用 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15813", "content": "有 (7/8) 千克 糖 ， 每个 袋子 装 (1/4) 千克 ， 可以 装 多少 袋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11027", "content": "益民 百货商店 有 空调 320 台 ， 电冰箱 比 空调 少 (2/5) ， 电冰箱 有 多少 台 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8239", "content": "5.6 / 11.2 的 商 ， 加上 1.25 的 (3/5) ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "701", "content": "今年 “ 丰收 杯 ” 篮球赛 有 25 个 村委会 参加 ， 每个 村委会 运动员 和 教练 都 是 18 人 ， 每人 需 15 元 的 赛前 体能 测试 费 ． 中心 卫生院 可 收入 体能 测试 费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18071", "content": "某 小学 有 男生 420 人 ， 男生 比 女生 多 (1/6) ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20572", "content": "从 (1/3) 里面 连续 减去 多少 个 (1/300) ， 结果 等于 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "149", "content": "5 辆 同样 的 汽车 3 次 共运 货物 67.5 吨 ， 每辆 汽车 每次 运 货物 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19186", "content": "布袋中 有 足够 多 的 5 种 不同 着色 的 球 ， 最少 取出 多少 个 球 ， 才能 保证 其中 一定 有 3 个 同 色 的 球 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13089", "content": "小 真 身高 1.23 米 ， 小海 比 小 真 高 0.02 米 ， 小 军 比 小海 矮 0.01 米 ． 小 军 身高 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9018", "content": "一 个 圆锥形 容器 中 装满 了 水 ， 把 水 倒入 一个 底面 直径 是 4 分 米 的 圆柱 容器 中 ， 水面 高度 正好 是 2 分 米 ． 这个 圆锥 容器 的 容积 = ？", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "13156", "content": "一 个 修路 队 ， 第一天 修 了 84 千米 ， 第一天 修 的 比 第 二 天 少 40% ， 两天 一共 修 了 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11299", "content": "在 六年级 统考 中 ， 刘 梅 数学 考 了 95 分 ， 刘 梅 的 成绩 比 王 强 数学 成绩 的 (9/8) 还 多 5 分 ， 王 强 在 这次 统考 中 数学 考 了 多少 分 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20857", "content": "一 个数 比 4.5 的 1.6 倍 小 0.7 ， 求 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9949", "content": "一 辆 客车 3 小时 行 270 千米 ． 照 这样 的 速度 ， 这辆 客车 从 甲地 开往 乙地 用 了 15 小时 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22360", "content": "司机 王 叔叔 从 济南 出发 到 徐州 送货 ， 前 3 小时 的 速度 是 60 千米 / 时 ， 后 2 小时 的 速度 是 55 千米 / 时 ， 从 济南 到 徐州 王 叔叔 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16887", "content": "甲 数 是 3200 ， 是 乙 数 的 80 倍 ， 甲乙 两 数 相差 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6771", "content": "一 件 上衣 原价 180 元 ， 现在 打 0.7 出售 ， 比 原价 降低 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15574", "content": "把 42 个 梨 平均 分成 3 份 ， 每份 = 多少 个 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13002", "content": "妈妈 买来 一个 西瓜 ， 小 明 吃 了 这个 西瓜 的 (1/5) ， 妈妈 吃 了 这个 西瓜 的 (3/10) ， 这个 西瓜 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14292", "content": "王老师 的 月工资 收入 是 2400 元 ， 按规定 ， 超过 2000 元 的 部分 要 按 5% 缴纳 个人所得税 ， 王老师 每月 实 得 工资 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3473", "content": "王大爷 有 一块 长 25 m ， 宽 14 m 的 长方形 麦田 ， 如果 每平方米 产 5 千克 小麦 ， 那么 这块 麦田 可以 产 小麦 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21254", "content": "601 班 有 64 名 学生 ， 上 学期 共 评出 8 名 优秀学生 ， 优秀学生 占 全班 人数 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20025", "content": "书店 要 把 980 本 教科书 送到 学校 去 ， 每箱 装 50 本 ， 已 装 了 18 箱 ， 没有 装箱 的 = 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12022", "content": "一 个数 减去 67 ， 得 54 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9725", "content": "小 云 有 邮票 138 张 ， 小 军 有 邮票 175 张 ． 小 明 的 邮票 的 张 数 比 小 云 和 小 军 的 总数 多 37 张 ． 小 明 有 多少 张 邮票 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13300", "content": "西 台 小学 共有 学生 720 人 ， 其中 六年级 是 全校 人数 的 (1/4) ， 五年级 是 六年级 的 (5/6) ， 五年级 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1314", "content": "一 个 长 20 厘米 ， 宽 15 厘米 ， 高 16 厘米 的 长方体 水槽 中 装满 了 水 ， 放入 一 石块 浸没 后 溢出 了 一些 水 ， 再 把 石块 拿出 ， 水位 下降 了 4 厘米 ． 求 石块 的 体积 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22454", "content": "体育课 时 学生 列队 报数 ， 从 左 至 右 ， 小 明报 12 ； 从 右 至 左 ， 小 明报 14 ， 列队 学生 共有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14521", "content": "幼儿园 原 计划 买 每套 45 元 的 儿童服装 36 套 ， 由于 断 货 ， 改 买 每套 54 元 的 儿童服装 ， 可以 买 多少 套 ？ （ 进一步 可以 求 出 什么 ？ ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17359", "content": "甲 是 (3/5) ， 比 乙 多 (1/4) ， 甲乙 的 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16358", "content": "把 144 名 三年级 学生 平均 分成 3 个 方队 ， 每个 方队 排成 4 排 ， 平均 每排 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1241", "content": "一 种 汽车 的 方向盘 的 直径 是 40 cm ， 它 的 周长 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21497", "content": "1029 - 145 与 2.5 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13825", "content": "8 辆 汽车 5 天 节约 汽油 48 千克 ， 照 这样 计算 ， 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22344", "content": "有 一个 教室 ， 长 8 米 ， 宽 3.2 米 ． 用 面积 是 0.64 平方米 的 方砖 铺 地 ， 至少 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8861", "content": "张 君 今年 45 岁 ， 小 刚 今年 5 岁 ， 3 年 后 ， 张 君 的 年龄 是 小 刚 的 多少倍 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18261", "content": "从 8256 中 减去 23 ， 连续 减去 36 次 ， 结果 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8020", "content": "宏远 电器 商店 有 一种 彩色 电视机 ， 如果 按 标价 降价 10% 出售 ， 可以 盈利 215 元 ， 如果 降价 20% 出售 ， 就 会 亏本 125 元 ． 那么 这 台 彩色 电视机 的 标价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8097", "content": "师徒 二 人 加工 一批 零件 ， 师傅 单独 做 要 20 天 完成 ， 而 徒弟 每天 做 27 个 零件 ， 他们 始终 合作 ， 当 他们 共同完成 这 批 零件 时 ， 徒弟 完成 的 数量 是 总数 的 (2/5) ， 求 这 批 零件 共 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14785", "content": "有 一条 公路 长 900 米 ， 在 公路 的 一侧 从头到尾 每隔 10 米 栽 一根 电线杆 ， 可 栽 多少 根 电线杆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8717", "content": "绘画 小组 的 人数 比 书法 小组 的 人数 少 (1/4) ， 绘画 小组 人数 是 书法 小组 人数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12821", "content": "一 个数 的 (1/5) 是 (1/2) ， 它 的 25% 是 _ _ _ _ _ _ _ _ ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10712", "content": "比 800 少 30% 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22207", "content": "修 一条 公路 ， 已修 5 千米 ， 剩下 的 占 已修 的 (7/5) ， 这 条 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15189", "content": "停车场 有 卡车 27 辆 ， 小汽车 的 辆数 比 卡车 的 辆数 的 4 倍 还 多 5 辆 ． 小汽车 有 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14840", "content": "甲乙 两 人 分别 从 两地 同时 出发 ， 甲 每分钟 走 65 米 ， 乙 每分钟 走 50 米 ， 经过 9 分钟 后 还 相距 20 米 ． 两地 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17291", "content": "制 体 厂 一 车间 装订 一批 练习本 ， 如果 每 小时 装订 600 本 ， 8 小时 可以 完成 任务 ． 如果 每 小时 装订 800 本 ， 可以 提前 几小时 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19842", "content": "8 千克 面粉 ， 吃掉 了 它 的 (3/4) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13361", "content": "如果 1 升 汽油 可 行驶 90 km ， 那么 驾车 行驶 99 km ， 需要 汽油 多少 l ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21626", "content": "有 一批 煤 ， 每天 烧 4.5 吨 ， 可 烧 28 天 ． 如果 每天 节省 0.3 吨 ． 这 批 煤 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15112", "content": "文具店 的 球类 物品 打 0.8 出售 ， 一个 篮球 原价 是 60 元 ， 现在 要 卖 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7854", "content": "在 回收 废电池 的 环保 活动 中 ， 四年级 共 回收 废电池 840 节 ， 是 六年级 所 回收 废电池 数量 的 (7/8) ， 五年级 回收 废电池 的 数量 是 六年级 的 (9/10) ． 五年级 回收 废电池 多少 节 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10377", "content": "五年级 （ 1 ） 班 有 男生 20 人 ， 男生 比 女生 多 (1/4) ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7046", "content": "小巧 和 小 亚 先后 从 学校 出发 骑车去 少年宫 ． 已知 小巧 每分钟 行 220 米 ， 小 亚 每分钟 行 280 米 ． 小巧 先行 了 660 米 后 ， 小 亚 才 出发 ， 结果 两 人 同时 到达 ． 小 亚 骑车 行 了 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15080", "content": "甲乙 两 师傅 (1/3) 小时 包 了 110 个 饺子 ， 甲 师傅 每 小时 包 180 个 ， 乙 师傅 每 小时 包 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9891", "content": "每千克 梨 3.5 元 ， 每千克 苹果 5 元 ． 小 明 带 了 50 元 ， 先买 了 2 千克 梨 ， 剩下 的 钱 买 苹果 ， 还 可以 买 多少 千克 苹果 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16967", "content": "学校 植树 ， 第一天 完成 计划 的 (3/8) ， 第 二 天 完成 余下 (2/3) ， 第 3 天 植树 55 棵 ， 结果 正好 完成 任务 ， 原 计划 植树 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1452", "content": "2 只 亚洲象 的 重量 相当于 3 只 河马 的 重量 ， 一只 河马 重 40 吨 ， 一只 亚洲象 重 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19720", "content": "一 本 故事书 有 136 页 ， 小 红 看 了 4 天 ， 还 剩 16 页 ． 小 红 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16349", "content": "水果店 运进 318 千克 荔枝 ， 上午 卖出 276 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13422", "content": "把 一根 (24/30) 米 长 的 绳子 剪成 相等 的 几段 ， 一共 剪 了 3 刀 ， 每 段长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1829", "content": "王师傅 计划 生产 零件 2000 个 ， 实际 超额 生产 了 250 个 ， 实际 完成 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3668", "content": "一 列 火车 从 甲地 开往 乙地 需要 3 个 小时 ， 我 (3/5) 小时 行驶 了 48 千米 ， 问 甲乙 两地 的 铁路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1936", "content": "小 明 和 小 丽 共有 20.60 元 ， 两 人 各 买 一本 同样 的 日记本 后 ， 小 明 还 剩 5.40 元 ， 小 丽 还 剩 3.20 元 ． 买 这样 的 日记本 一共 花 了 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19391", "content": "某 数 减去 它 的 10% ， 等于 210 的 (1/3) ， 求 某 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6504", "content": "学校 举行 冬季 长跑 比赛 ， 最慢 的 同学 每分钟 跑 170 米 ， 最快 的 每分钟 跑 183 米 ． 15 分钟 后 ， 最快 的 同学 和 最慢 的 同学 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20056", "content": "一 根 圆柱形 木头 ， 锯 成 4 段 ， 需 1.2 小时 ， 如果 锯 成 10 段 ， 需 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4964", "content": "“ 旺 佳 ” 水果 超市 运进 一批 梨 ， 第一天 卖出 梨 总量 的 (1/6) ， 第 二 天 卖出 余下 的 (2/5) ， 第 3 天 卖出 梨 总量 的 (1/4) 后 ， 还 剩下 140 千克 ． “ 旺 佳 ” 水果 超市 共 运进 多少 梨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "20579", "content": "一 水池 的 水 用 去 (2/7) ， 还 剩 20 吨 ， 这 池水 本来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19028", "content": "学校 要 在 我们 六年级 任选 一位 同学 参加 座谈会 ， 如果 全年 级 中 男生 被 选中 的 可能性 是 (1/3) ， 已知 全年 级 男生 有 35 人 ， 那么 全年 级 的 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14334", "content": "把 一张 饼 的 (3/7) 平均 分成 3 份 ， 每份 是 这 张 饼 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13061", "content": "圆柱 的 侧面 = 多少 形 ， 一个 圆柱 的 底面 周长 是 12.56 厘米 ， 高 是 5 厘米 ， 它 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19223", "content": "9 / 4.5 的 商 ， 减去 0.3 ， 再 乘 8 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21104", "content": "暑假 夏令营 里 有 548 位 同学 乘车 去 旅游 ， 租 了 12 辆车 ， 每辆车 坐 的 人数 相同 ， 还 剩下 8 人 没 座位 ， 每辆车 坐 了 多少 个 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12600", "content": "希望 小学 计划 招收 一年 级新生 80 人 ， 实际 招收 了 120 人 ， 实际 比 计划 增加 招生 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4849", "content": "三年级 （ 1 ） 班 有 42 名 同学 订阅 《 少年报 》 的 有 31 名 同学 ， 订阅 《 童话 报 》 的 有 27 名 同学 ， 每人 至少 订 其中 一份 报纸 ， 有 多少 名 同学 既 订 《 少年报 》 又 订 《 童话 报 》 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18045", "content": "粮店 运 来 大米 865 千克 ， 上午 卖出 278 千克 ， 下午 卖出 388 千克 ， 还 剩下 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7449", "content": "一 桶 油 重 5 千克 ， 多少 桶 这样 的 油 重 30 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3016", "content": "516 连续 减去 6 ， 减 多少 次 之后 差 为 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8797", "content": "张师傅 每 小时 做 18 个 零件 ， 王师傅 每 小时 做 20 个 零件 ． 两 人 合作 ， 6 小时 完成 了 一批 零件 加工 任务 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13562", "content": "建 一座 厂房 ， 计划 投资 200 万元 ， 实际 比 计划 节约 了 (3/50) ． 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "24", "content": "比 一个 数多 12% 的 数 是 112 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2963", "content": "学校 买来 一批 图书 ， 其中 故事书 有 430 本 ， 科技 书 的 数量 是 故事书 的 2 倍 ， 故事书 和 科技 书 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3626", "content": "桃树 的 棵 数 比 梨树 多 (2/5) ， 梨树 有 45 棵 ． 这里 是 把 多少 看作 单位 “ 1 ” ， 桃树 有 多少 棵 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8907", "content": "3 个 同学 踢毽子 ， 小强 踢 了 140 下 ， 是 李 平 的 (5/7) ， 张 丽 踢 的 是 李 平 的 (3/4) ， 张 丽 踢 了 多少 下 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "291", "content": "六年级 开 联欢会 ， 买 了 水果 18 千克 ， 买 的 糖 是 水果 的 (2/3) ， 又 是 买 的 点心 的 (5/4) ， 六年级 买 点心 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22402", "content": "原来 有 30 个 同学 ， 又 走来 15 个 ． 这些 同学 5 人 排 一行 ， 可以 排 几行 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7428", "content": "同学 们 做 了 46 朵 红花 ， 32 朵 黄花 ， 把 这些 花 平均 分给 一年级 的 3 个 班级 ， 每个 班级 得到 多少 朵花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17858", "content": "一 本 故事书 的 售价 是 3.82 元 ， 一本 连环画 的 售价 比 这本 故事书 售价 的 2 倍 少 0.85 元 ， 那么 一本 连环画 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16051", "content": "五年级 两个 班 参加 植树 活动 ， 一班 37 人 ， 植树 132 棵 ； 二 班 35 人 ， 植树 120 棵 ， 五年级 平均 每人 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14030", "content": "甲 仓 原来 比 乙 仓 少 存粮 50 吨 ， 从 甲 仓 往 乙 仓 调运 了 30 吨 粮食 后 ， 甲 仓 现在 存粮 比 乙 仓 少 (1/4) ． 乙 仓 现在 存粮 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9365", "content": "甲 数 的 (1/4) 与 乙 数 的 50% 相等 ， 甲 数 是 120 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20968", "content": "小 红 看 一本 120 页 的 书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (3/8) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18504", "content": "新 农村 里 有 30 幢 楼房 ， 每 幢 楼房 里 住 2 户 人家 ， 平均 每户 有 3 人 ， 新 农村 里 共有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17416", "content": "椅子 每 把 36 元 ， 每张 单人 课桌 的 价钱 比 每 把 椅子 贵 28 元 ， 买 一套 桌椅 需要 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5447", "content": "六年级 女生 和 男生 人数 的 比 是 4 ： 5 ， 那么 ， 女生 占 全年 级 学生 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10071", "content": "果园 里 桃树 和 梨树 棵 树 的 比 是 5 ： 4 ， 桃树 的 棵 树 比 梨树 多 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19838", "content": "一 个 商场 运进 衬衫 360 件 ， 上午 卖出 总数 的 (4/9) ， 下午 卖出 的 是 上午 的 (5/8) ， 下午 卖出 衬衫 多少 件 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5458", "content": "一 堆 煤 ， 原 计划 每天 烧 15 吨 ， 可 烧 40 天 ． 实际 每天 比 原 计划 节约 3 吨 ， 实际 烧 了 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7030", "content": "某 江 汛期 时 中流 与 沿岸 的 水速 有 很大 不同 ， 中流 每 小时 45 里 ， 沿岸 每 小时 25 里 ． 今 有 一 汽船 顺 中流 而 下 ， 4 小时 行驶 了 440 里 ， 问 从 沿岸 返回 原处 需 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5176", "content": "洋洋 读 一本 故事书 ， 第一天 读 了 全书 的 (3/8) ， 第 二 天 读 了 余下 页数 的 (1/5) ． 这时 还 剩下 60 页 没有 读 ． 这本 故事书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3603", "content": "今年 爸爸 35 岁 ， 儿子 的 年龄 是 爸爸 的 (1/7) ， 再 过 5 年 ， 儿子 的 年龄 是 爸爸 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7901", "content": "王 军 买 了 一 筒 羽毛球 ， 一 筒 有 12 个 ， 一共 花 了 21.6 元 ， 一个 大约 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11412", "content": "一 个 平行四边形 的 面积 是 32 平方厘米 ， 它 的 高 是 8 厘米 ， 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20706", "content": "一 种 商品 的 原价 是 200 元 ， 现价 比 原来 降低 了 20% ， 现价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2996", "content": "食堂 运来了 850 千克 大米 ， 吃 了 15 天 ， 平均 每天 吃 32 千克 ， 还 剩 多少 千克 大米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10924", "content": "甲 、 乙 两列 火车 同时 从 相距 1620 千米 的 两城 相对 开出 ， 经过 6 小时 相遇 ． 已知 甲 车 每 小时 行 130 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13628", "content": "一 条 铁路 ， 甲队 单独 修 5 天 完成 总 工程量 的 (1/20) ， 乙 队 单独 修 6 天 完成 总 工程量 的 (1/25) ． 两队 合 修 ， 需要 多少 天 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11319", "content": "“ 西装 专柜 ” 有 一款 西服 ， 原来 每套 900 元 ， 商家 庆元旦 搞 促销 活动 ， 现在 每套 0.9 出售 ， 现在 买 这样 一套 西服 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13312", "content": "一 副 羽毛球 球拍 220 元 ， 正好 是 5 盒 羽毛球 的 价钱 ． 小 刚 买 了 一副 羽毛球 球拍 和 一盒 羽毛球 ， 一共 要 付 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5540", "content": "两艘 军舰 同时 从 相距 688.5 千米 的 两个 港口 相对 开出 ， 一艘 军舰 每 小时 行 36.5 千米 ， 另 一艘 军舰 每 小时 行 40 千米 ， 经过 几小时 两艘 军舰 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19774", "content": "蜡笔画 有 80 幅 ， 水彩画 比 蜡笔画 少 (3/8) ， 水彩画 有 多少 幅 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19685", "content": "有 一台 空调 ， 原价 1600 元 ， 涨价 后 卖 2000 元 ， 涨 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8639", "content": "王 华 看 一本 课外读物 ， 第一天 看 了 这 本书 的 20% ， 第 二 天 看 了 剩下 的 30% ， 还有 140 页 没有 看 完 ， 这本 课外读物 共 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3367", "content": "把 4.3 米厂 的 竹竿 插入 水中 ， 测量 水池 的 深度 ， 入 泥 部分 是 0.3 米 ， 露出 水面 1.1 米 ， 水池 蓄水 深度 = 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13055", "content": "某 商场 原有 电脑 150 台 ， 后 又 运 来 60 台 ． 在 一个 星期 的 时间 里 共 售出 总 台数 的 (2/3) ， 售出 了 多少 台 电脑 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2572", "content": "一 个数 用 2 、 5 、 15 去除 都 能 整除 ， 这个 数 最小 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19542", "content": "比 12 米 多 (1/4) = 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4424", "content": "食品 公司 进 了 一批 桔子 ， 第一天 卖出 全部 的 (2/5) ， 第 二 天 卖出 剩下 的 (1/2) ， 第 3 天 比 第一天 少卖 (1/3) ， 这时 还 剩 50 公斤 ， 食品 公司 共 进 了 多少 公斤 桔子 ？ （ 列式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "20243", "content": "一 篮 苹果 连 篮 共 重 1635 克 ， 取出 8 个 苹果 后 ， 连 篮 还 重 675 克 ， 平均 每个 苹果 有 多重 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21846", "content": "一 瓶 饮料 正好 能 倒 满 4 个 相同 的 玻璃杯 ， 每个 玻璃杯 的 容量 是 饮料瓶 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12214", "content": "8888 * 77778 + 4444 * 22222 + 1777.6 * 55555 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "22222", "content": "李 英 把 500 元 钱 存入 银行 ， 整存整取 5 年 ， 年利率 是 3.75% ． 到期 时 李 英 一共 可以 从 银行 取出 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15708", "content": "民间故事 书 有 185 本 、 童话 书 有 210 本 、 儿童 小说 有 335 本 ． 儿童 小说 比 童话 书 多 多少 本 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13237", "content": "实验 小学 合唱组 有 80 人 ， 美术组 的 人数 是 合唱组 的 (2/5) ， 美术组 的 人数 是 书法 组 的 (2/3) ， 书法 组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9049", "content": "50 的 (3/10) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2829", "content": "商店 从 工厂 批发 了 80 部 快译通 ， 工厂 批发 的 快译通 每 台 180 元 ， 卖出 50 台后 ， 开始 降价 销售 ， 原价 每 台 200 元 ， 现价 每 台 160 元 ， 如果 商店 全部 售出 ， 商店 是 赚钱 还是 亏 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "20955", "content": "189 与 165 的 差 的 8 倍 / 32 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13787", "content": "一 列 火车 共有 14 节车厢 ， 其中 12 节车厢 是 软座 ， 每 节车厢 乘坐 108 人 ， 另外 2 节 是 卧铺 ， 每 节车厢 有 80 个 床位 ， 这 列 火车 共 可 乘 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3436", "content": "某 农机厂 今年 每月 生产 的 农具 是 去年 的 3 倍 ， 今年 每月 生产 4140 件 ， 今年 每月 比 去年 每月 多 生产 农具 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16652", "content": "有 3 吨 化肥 ， 第一天 运走 它 的 (1/4) ， 第 二 天 运走 它 的 (2/5) ， 还 剩 这 批 化肥 的 多少 没有 运 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11910", "content": "图书室 有 9 个 书架 ， 每个 书架 有 4 层 ， 每层 有 208 本书 ， 图书室 一共 有 多少 书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21038", "content": "李师傅 要 加工 300 个 零件 ， 已经 加工 了 60 个 ． 如果 每天 加工 48 个 ， 还要 几天 才能 加工 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21320", "content": "一 匹 马 的 体重 是 208 千克 ， 一头 大象 的 体重 是 一匹 马 的 8 倍 ， 一头 大象 的 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "500", "content": "妈妈 带 小 明 坐 长途汽车 去 看 奶奶 ， 汽车 平均 每 小时 行 80 千米 ， 4 小时 到达 奶奶家 ． 妈妈 和 小 明 乘车 的 里程 = 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10238", "content": "(1/2) / (2/3) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21125", "content": "学校 运动场 的 跑道 一侧 长 400 米 ， 从头到尾 每隔 10 米 栽 一棵树 ， 一共 栽 了 多少 棵 树 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22871", "content": "一 个 圆柱体 的 体积 500 立方分米 ， 高 为 25 分 米 ， 底 面积 = 多少 平方分米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3822", "content": "小 丽 的 爸爸 写 了 一本 《 数学家 故事 》 ， 获得 稿费 3600 元 ． 按规定 ， 一次 稿费 超过 了 800 元 的 部分 按 14% 的 税率 纳税 ， 纳税 后 小 丽 爸爸 的 稿费 收入 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5416", "content": "果园 里 有 桃树 300 棵 ， 是 苹果树 的 (3/4) ， 梨树 是 苹果树 的 (3/5) ． 梨树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14799", "content": "元旦 期间 ， “ 中 商 百货 ” 里 全场 打 0.85 ． 妈妈 看中 了 一套 原价 580 元 的 衣服 ， 如果 购买 ， 她 需要 准备 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20153", "content": "一 位 同学 在 数学 期中 测试 中 ， 除了 数学 外 ， 其它 几门 功课 的 平均 成绩 是 94 分 ， 如果 数学 算在内 ， 平均 每 门 95 分 ， 已知 他 数学 得 了 100 分 ， 问 这位 同学 一共 考 了 几门 功课 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6920", "content": "小 东 的 身高 1.40 米 ， 比 爸爸 矮 0.38 米 ， 爸爸 的 身高 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7104", "content": "商店 上午 卖出 水果 20 箱 ， 下午 卖出 的 水果 比 上午 多 (2/5) ． 这天 一共 卖出 水果 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13021", "content": "影剧院 有 座位 28 排 ， 每排 32 个 座位 ， 今晚 要 放映 一部 贺岁片 ， 每张 票 25 元 ． 如果 这些 票 全部 售出 ， 可以 收款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1671", "content": "甲 、 乙 两辆 汽车 同时 从 两地 相对 开出 ， 甲 车 每 小时 行 75 千米 ， 乙 车 每 小时 行 60 千米 ， 经过 4.5 小时 两车 相遇 ． 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19543", "content": "小 丁 看 故事书 ， 第一 星期 看 了 183 页 ， 第 二 星期 看 了 258 页 就 把 书 看 完 了 ， 那么 这本 故事书 一共 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6055", "content": "月 月 水果 批发部 共有 600 千克 水果 ， 其中 苹果 267 千克 ， 橘子 124 千克 ， 其余 的 都 是 梨 ． 梨 有 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6699", "content": "红光 农场 有 两块 麦田 ， 第一块 5.5 公顷 ， 共 收 小麦 27.3 吨 ， 第 二 块 3.6 公顷 ， 共 收 小麦 18.2 吨 ， 这两块 麦田 平均 每 公顷 收 小麦 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12528", "content": "把 一个 长方体 的 宽 增加 2 厘米 后 ， 就 变成 一个 棱 长 是 10 厘米 的 正方体 ， 原来 长方体 的 体积 = 多少 立方厘米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4284", "content": "李师傅 每 小时 加工 零件 57 个 ， 王师傅 每 小时 加工 零件 48 个 ， 两 人 一起 加工 12 小时 ， 一共 可以 零件 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12229", "content": "小强 参加 学校 体育 集训队 后 ， 跑 100 米 的 时间 从 原来 的 18 秒 缩短 到 15 秒 ， 小强 跑 百米 的 速度 比 原来 提高 了 百分之几 ？ （ 百分号 前 保留 一位 小数 ）", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13418", "content": "列式 计算 ： (5/4) 比 一个 数 的 (7/15) 少 (1/2) ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20972", "content": "周易 计划 在 今年 “ 5 一 ” 节 把 积蓄 的 零钱 1500 元 存入 银行 ， 定期 2 年 ， 准备 到期 后 把 利息 捐赠 给 贫困地区 的 “ 特困生 ” ． 如果 年利率 按 4.37% 计算 ， 到期 他 可以 捐出 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8871", "content": "一 件 衣服 ， 现价 120 元 ， 比 原价 少 了 40 元 ， 降价 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16067", "content": "一 本书 共 100 页 ， 小 红 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 全书 的 (1/5) ， 还 剩 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22523", "content": "数学 书 封面 长 24 厘米 ， 比 它 的 宽 多 7.2 厘米 ． 数学 书 封面 的 宽 = 多少 厘米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12932", "content": "月亮 艺术团 有 8 个 班 ， 每个 班 36 人 ， 其中 女生 有 159 人 ， 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21252", "content": "服装厂 计划 两周 生产 一批 服装 ， 第一周 完成 计划 的 (3/10) ， 第 二 周 完成 计划 的 (4/5) ， 结果 比 计划 多 生产 了 200 件 ． 服装厂 计划 生产 多少 件 服装 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10596", "content": "一 个 修路 队 20 人 要 抢修 一条 长 480 米 的 公路 ， 前 3 天 每天 修 50 米 ， 余下 的 5 天 修 完 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3740", "content": "某村 修 一条 水渠 ， 5 天 修 了 520 米 ， 照 这样 算 ， 再 修 8 天 就 完成 了 任务 ， 这 条 水渠 有 多长 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16488", "content": "一 个 长方形 的 长 是 24 米 ， 是 宽 的 3 倍 ， 它 的 面积 = 多少 平方米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8575", "content": "大 勇 和 小 云 有 同样 多 的 钱 ． 大 勇 买 卡通 书 用 去 22 元 ； 小 云 买 彩色笔 用 去 7 元 ． 这时 小 云 剩下 的 钱 是 大 勇 剩下 的 钱 的 4 倍 ． 那么 ， 大 勇 和 小 云 原来 各 有 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9020", "content": "把 3 只 匹萨饼 平均 分给 10 个 小朋友 吃 ， 每个 小朋友 吃 到 了 多少 个 匹萨饼 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4330", "content": "食堂 运 来 一批 煤 ， 计划 每天 烧 1.2 吨 ， 可以 烧 30 天 ． 实际 每天 节约 0.3 吨 ， 这 堆 煤 实际 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4432", "content": "递 铺 港 原来 有 3 条 游船 ， 每天 收入 225 元 ． 照 这样 计算 ， 现在 有 游船 14 条 ， 每天 可 收入 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20027", "content": "甲乙 两 数 的 比 是 3 ： 4 ， 乙 数 减 甲 数 得 10 ， 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16525", "content": "果园 里 种 了 2400 棵 桃树 ， 苹果树 的 棵 数 比 桃树 少 (1/6) ， 苹果 树种 了 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18765", "content": "司机 王 叔叔 从 厦门 出发 到 福州 送货 ， 去 时 用 了 7 小时 ， 车 的 速度 是 60 千米 / 小时 ， 返回 时 用 了 6 小时 ， 厦门 到 福州 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18847", "content": "多少 除以 8 商 125 余 4 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18993", "content": "李 丽 看 一本 漫画书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 全书 的 (1/4) ， 两天 共 看 了 84 页 ， 全书 共 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3265", "content": "希望 小学 四年级 有 50 名 学生 ， 有 26 人 参加 乒乓 比赛 ， 21 人 参加 篮球比赛 ， 两项 比赛 都 不 参加 的 有 17 人 ． 两项 比赛 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22509", "content": "甲 、 乙 两 数 的 积 是 10.2 ， 如果 甲 数 扩大 10 倍 ， 乙 数 扩大 100 倍 ， 则 现在 甲 、 乙 两 数 的 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20097", "content": "一 根 长方体 木料 长 4 米 ， 横截面 面积 是 0.05 平方米 ， 这根 木料 的 体积 = 多少 立方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10986", "content": "商店 买卖 一批 干洗机 ， 进货价 每 台 400 元 ， 售出 价 每 台 420 元 ． 每 台 可 获利 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1272", "content": "商店 运 来 25 箱 饮料 ， 每箱 12 瓶 ， 每瓶 售价 4 元 ． 这些 饮料 能 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2480", "content": "小 明 今天 看书 90 页 ， 昨天 看书 的 页数 比 今天 少 (1/9) ． 问 ： 小 明 昨天 看书 多页 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14097", "content": "一 个 圆柱 底面 半径 2 分 米 ， 侧 面积 是 113.04 平方分米 ， 这个 圆柱体 的 高 = 多少 分 米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9698", "content": "商店 进 50 吨 水果 ， 损耗率 为 2% ， 实际 售出 水果 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19229", "content": "儿子 的 年龄 是 妈妈 的 (6/17) ， 妈妈 的 年龄 是 爸爸 的 (17/19) ， 儿子 今年 12 岁 ， 爸爸 有 几岁 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6680", "content": "一 件 上衣 原价 28 元 ， 现在 降价 (1/4) ， 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12869", "content": "有 浓度 为 8% 的 盐水 400 克 ， 经 煮沸 后 ， 变成 10% 的 盐水 ． 水 减少 了 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22905", "content": "（ 2.8 + 3.85 / 3.5 ） * 4.6 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11865", "content": "一 本 故事书 小 明 要 12 天 看 完 ， 前 5 天 每天 看 18 页 ， 后 7 天 每天 看 2 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14003", "content": "小 明 把 1000 元 的 零花钱 存入 银行 里 ， 存期 3 年 ， 年利率 是 3.5% ， 到期 后 所得 的 利息 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11083", "content": "老李 骑车 从 家 出发 到 县城 ， 已经 行 了 7.5 千米 ， 相当于 全程 的 (3/8) ， 小 方家 到 县城 有 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19458", "content": "一 个 粮站 的 仓库 里 存有 大米 4000 千克 ， 一月份 卖出 总数 的 (3/10) ， 二 月份 卖出 总数 的 35% ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9345", "content": "在 2010 年 7 月 13 日 小河 镇 发生 特大 洪涝 泥石流 灾害 时 ， 一辆 救援车 从 离 小河 镇 灾区 450 千米 的 地方 赶来 ， 6 小时 到达 ， 这辆 救援车 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20643", "content": "一 台 v cd机 630 元 ， 比 一台 电视机 便宜 305 元 ， 电视机 的 价钱 = 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21947", "content": "小 青 和 妈妈 去 粮店 买 粮 ， 粮店 的 价 牌 上 写 着 大米 每千克 2.25 元 ， 面粉 每千克 2.37 元 ， 妈妈 准备 买 大米 30 千克 ， 买 面粉 25 千克 ， 妈妈 问 小 青 一共 要 用 多少 钱 ． 请 你 帮 小 青 算 一 算 一共 要 用 多少 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10765", "content": "小 猴 妈妈 买 回 了 一筐 香蕉 ， 贪吃 的 小 猴 们 一下子 吃 了 30% ， 还 剩下 28 千克 ， 小 猴 们 共 吃 了 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3071", "content": "红星 小学 有 男生 420 人 ， 女生 人数 是 男生 的 (6/7) ， 红星 小学 一共 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8481", "content": "16 路 公交车 在 水门 桥 有 (1/3) 的 人 下车 ， 又 有 20 人 上车 ， 这里 车上 的 人 比 原来 多 (1/7) ， 原来 车上 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17767", "content": "某 车队 运送 一批 救灾物资 ， 原 计划 每 小时 行 40 千米 ， 7.5 小时 到达 灾区 ． 实际 每 小时 多行 10 千米 ， 这样 到达 灾区 用 了 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3485", "content": "买 一套 运动服 135 元 ， 买 一双 运动鞋 48 元 ， 妈妈 用 200 元 钱 为 小 明 买 了 一套 运动服 和 一双 运动鞋 ， 问 还 剩下 多少 元 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8168", "content": "一 堆 沙石 ， 用 去 35 吨 ， 还 剩 15 吨 ， 剩下 的 沙石 占 这 堆 沙石 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "973", "content": "书店 运 来 一种 儿童 故事书 ， 第一天 卖 了 30% ， 第 二 天 卖 的 相当于 第一天 卖 的 120% ， 比 第一天 多 卖 30 本 ． 书店 运 来 的 这种 故事书 一共 有 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14583", "content": "某校 女生 比 男生 少 70 人 ， 正好 少 10% ， 该校 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11761", "content": "25 + 26 - 12 - 13 + 27 + 28 - 14 - 15 + 29 + 30 - 260 - 261 = ．", "knowledge": ["+", "-"], "difficulty": 1.0, "length": 23}
-{"question_id": "18041", "content": "已知 两个 因数 的 积 是 3.9 ， 一个 因数 扩大 10 倍 ， 另 一个 因数 缩小 100 倍 ， 积 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14044", "content": "10 米 的 (2/5) = 多少 米 的 (1/2) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14192", "content": "4 （ 1 ） 班 有 学生 34 人 ， 其中 爱好 乒乓 的 有 17 人 ， 爱好 游泳 的 14 人 ， 既 爱好 乒乓 又 爱好 游泳 的 4 人 ． 那么 ， 两样 都 不 爱好 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16335", "content": "一 个 平行四边形 底 长 12 米 ， 高 8 米 ， 它 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21318", "content": "一 块 平行四边形 模板 ， 面积 是 3 平方米 ， 高 是 (3/4) 米 ， 底 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13138", "content": "一 根 电线 长 600 米 ， 用 去 了 全部 的 (4/5) ， 用 去 了 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15198", "content": "六年级 男生 比 女生 多 (1/4) ， 女生 比 男生 少 6 人 ， 女生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "124", "content": "小 明 看 一 全书 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 了 15 页 ， 这时 已 看 的 和 未 看 的 页数 的 比 是 2 ： 3 ， 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9884", "content": "小 明 看 一本 故事书 ， 第一天 看 了 全书 的 25% ， 第 二 天 看 了 全书 的 (1/5) ， 两天 共 看 225 页 ， 这 本书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17835", "content": "航空母舰 从西向东 以 每 小时 40 千米 的 速度 航行 ， 飞机 从 舰 上 起飞 以 每 小时 1400 千米 的 速度 向东 执行 任务 ， 如果 飞机 在 空中 最 多 能 连续飞行 3 小时 ， 那么 这 架飞机 在 起飞 后 向东 最远 可 飞 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19086", "content": "一 包 茶叶 重 600 克 ， 用 去 (3/5) ， 用 去 多少 克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19642", "content": "修路 队 要 修 3000 千米 的 路 ， 第一天 修 了 639 千米 ， 第 二 天 修 了 865 千米 ， 两天 共 修 了 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17464", "content": "学校食堂 原来 每周 要 用 掉 4200 双 一次性 筷子 ， 每 双 筷子 0.03 元 ． 现在 学校食堂 不用 一次性 筷子 了 ， 一周 可 节约 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1550", "content": "4 头 大象 的 体重 是 20 吨 ， 2 头 蓝鲸 的 体重 是 320 吨 ． 平均 一头 蓝鲸 的 体重 比 一头 大象 重 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17018", "content": "在 一个 长 6 分 米 、 宽 2 分 米 的 长方形 纸 上 剪下 一个 最大 的 半圆 ， 这个 半圆 的 面积 = 多少 平方分米 ．", "knowledge": ["*", "/", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "7064", "content": "小 明 每分钟 走 75 米 ， 照 这样 的 速度 ， 他 从 家 到 学校 走 了 14 分钟 ， 离 学校 还有 130 米 ． 他家 到 学校 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22405", "content": "李 萌 在 银行 存 了 8000 元 ， 定期 3 年 ， 年利率 为 5% ． 到期 时 她 可 得 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10635", "content": "我 又 长胖 了 ， 现在 有 44.2 千克 ， 比 上个月 增加 了 0.9 千克 ． 丁丁 上个月 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14223", "content": "“ 十一 黄金周 ” 期间 某 公园 票价 上浮 50% 后 是 60 元 ． 这个 公园 原 票价 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7024", "content": "一 只 雨燕 3.5 小时 飞行 378 千米 ， 一只 信鸽 每 小时 大约 飞行 45 千米 ， 雨燕 的 速度 大约 是 信鸽 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3342", "content": "一 批 水泥 ， 用 去 (5/8) ， 剩下 的 是 用 去 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11220", "content": "五年级 两个 班 的 学生 采集 树种 ， （ 1 ） 班 46 人 ， 每人 采集 0.14 千克 ， （ 2 ） 班 36 人 共 采集 6.15 千克 ， 两个 班 一共 采集 树种 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6533", "content": "一 块 平行四边形 土地 ， 底 长 30 米 ， 高 20 米 ， 这块 土地 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22336", "content": "一 块 饼 ， 爸爸妈妈 各 吃 它 的 (2/5) ， 小 诗 把 剩下 的 都 吃 完 了 ， 小 诗 吃 了 这个 饼 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23098", "content": "李 叔叔 从 绵阳 到 成都 乘坐 汽车 ． 汽车 的 速度 是 83 千米 \\ 小时 ， 2 小时 后 还 相距 45 千米 ． 绵阳 到 成都 一共 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "523", "content": "水果 批发 站 原有 140 筐 水果 ， 运走 了 90 筐 ， 又 运进 一些 后 ， 现在 水果 批发 站 有 水果 150 筐 ， 又 运进 水果 多少 筐 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18693", "content": "桌子 42.8 元 / 张 ， 椅子 12.2 元 / 把 ． 实验 小学 购进 300 套 课桌椅 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1119", "content": "一 个 工程队 计划 修 一条 公路 ， 计划 每天 修 0.75 千米 ， 12 天 可以 完成 ， 因为 工作人员 减少 ， 每天 比 计划 少 修 0.15 千米 ， 多少 天 可以 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8265", "content": "三年级 有 95 个 同学 进行 武术 训练 ， 每 5 人 分 一组 ， 需要 分 多少 个 组 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1961", "content": "商店 运 来 10 箱 牙膏 ， 每箱 12 盒 ， 每盒 15 支 ， 一共 运 来 多少 支 牙膏 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8412", "content": "同学 们 参加 广播操 表演 ， 每个 方队 站 25 行 ， 每行 28 人 ． 一共 有 多少 同学 参加 表演 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6959", "content": "一 个 圆柱 的 底面 周长 是 31.4 厘米 ， 高 是 4 厘米 ， 它 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11325", "content": "布袋 里 有 红 、 绿 两种 小 木块 各 6 块 ， 形状 大小 都 一样 ， 如果 要 保证 一次 能 从 布袋 里 取出 2 块 颜色 不同 的 木块 ， 至少 必须 取出 几块 小 木块 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2155", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 40% ， 第 二 天 修 了 全长 的 30% ， 还 剩下 150 米 没 修 ． 这 条 水渠 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1825", "content": "我们 队 每天 修路 90 千米 ， 8 天 后 还 剩 325 千米 没 修 ． 这 条 路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2275", "content": "3 （ 2 ） 班 同学 中 ， 参加 唱歌 兴趣小组 的 有 32 人 ， 参加 画画 兴趣小组 的 有 28 人 ， 两样 都 参加 的 有 20 人 ， 两个 小组 一共 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11559", "content": "某 运输队 将 一批 帐篷 运往 地震 灾区 ， 原 计划 每 小时 行 70 千米 ， 12 个 小时 到达 ， 由于 道路 多处 受损 ， 实际 每 小时 行 40 千米 ． 运输队 到达 灾区 实际 用 了 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6099", "content": "一 根 电线 长 40 米 ， 先 用 去 它 的 30% ， 再 用 去 (1/4) 米 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11066", "content": "一 张 平行四边形 纸 的 底 是 10 分 米 ， 它 对应 的 高 是 6 分 米 ， 若 把 它 剪成 两个 完全 一样 的 三角形 ， 其中 一个 三角形 的 面积 = 多少 分 米 ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21537", "content": "电视机厂 计划 二 月份 生产 电视机 1800 台 ， 实际 比 计划 多 生产 了 (1/9) ， 实际 生产 了 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19092", "content": "某 修路 队 要 修 4960 米 长 的 一段 公路 ， 15 天 已经 修好 了 2400 米 ． 照 这样 的 速度 ， 再 修 多少 天 就 能 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9518", "content": "用 一根 长 8 m 的 绳子 绕 一棵 大树 一圈 后 还 剩 1.72 m ， 这 棵 大树 的 周长 = 多少 m ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22105", "content": "一 个数 的 37 倍 是 925 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "300", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/5) 还 多 16 页 ， 正好 看 了 88 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14909", "content": "甲乙 两辆 汽车 同时 从 相距 540 千米 的 两地 相向 开出 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 42 千米 ， 经过 几小时 两车 可以 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4648", "content": "一 辆 客车 2 小时 行驶 100 千米 ， 照 这样 的 速度 ， 如果 再 行驶 3.5 小时 就 能 行 完全 程 ， 全程 有 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1494", "content": "一 箱 可乐 重 5 千克 ， 8 箱 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5162", "content": "汽车 的 速度 比 摩托车 快 20% ． 汽车 的 速度 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13428", "content": "一 个数 的 3 倍 与 这个 数 的 2 倍 的 和 是 30 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15814", "content": "已知 m 、 n 两 数 的 比 是 2 ： 3 ， 它们 的 最大公约数 是 16 ， 那 m = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20837", "content": "张 元 和 李 欣 是 同班同学 ， 并 住 在 同 一幢 楼 的 同一个 门 号 里 ． 李 欣 以 每分钟 80 米 的 速度 先 从 学校 回家 ， 走 了 2400 米 后 ， 张 元 骑 自行车 沿 李 欣 回家 的 路线 以 每分钟 240 米 的 速度 也 回家 ． 张 元 多少 分钟 能 追 上 李 欣 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18540", "content": "六年级 有 学生 45 人 ， 上 学期 期末 跳远 测验 有 80% 的 同学 及格 ， 及格 的 同学 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20548", "content": "甲乙 两车 从 ab 两地 相向 而 行 ， 甲 行 了 全程 的 (4/7) ， 乙 行 了 全程 的 (5/7) ， 两车 相距 24 千米 ， 求 ab 两地 的 距离 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14105", "content": "甲 数 是 150 ， 乙 数 比 甲 数多 15% ， 丙 数 比 乙 数 少 20% ， 丙 数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20184", "content": "一 只 鸡 4 千克 ， 一只 鸭 比 它 重 (1/2) 千克 ， 鸭 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8635", "content": "啄木鸟 7 天 能 吃 4515 只 害虫 ， 山雀 一周 能 吃 1155 只 害虫 ． 啄木鸟 平均 每天 比 山雀 多 吃 害虫 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10177", "content": "一 张 桌子 85 元 ， 一把 椅子 35 元 ， 全班 共有 桌椅 36 套 ， 一共 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20298", "content": "智力 冲浪 ． 甲乙 两 数 相乘 ， 如果 甲 数 增加 10.1 ， 乙 数 不变 ， 积 增加 23.23 ； 如果 乙 数 增加 7.2 ， 甲 数 不变 ， 积 增加 33.12 ． 甲 数 除 乙 数 的 商 = ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3588", "content": "一 本书 已经 看 了 60 页 ． 正好 是 剩下 的 (1/4) ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23099", "content": "一 辆 货车 从 甲地 往返 乙地 ， 去 时 速度 是 36 千米 / 每 小时 ， 5 小时 到达 乙地 ， 从 乙地 返回 时 每 小时 行驶 45 千米 ， 货车 返回 时 需要 多少 时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6139", "content": "图书馆 有 科技 书 400 本 ， 比 故事书 少 (1/5) ， 故事书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3277", "content": "修 一条 水渠 ， 每天 修 500 米 ， 5 天 修 了 全程 的 50% ， 剩下 的 工作效率 提高 了 20% ， 剩下 这 段 工程 可以 提前 多少 天 完工 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19699", "content": "0.375 + (5/8) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6658", "content": "鞋厂 生产 皮鞋 ， 十 月份 购进 60 张 牛皮 ， 每 双 鞋 需要 牛皮 (4/15) 张 ， 把 做好 的 鞋 的 (4/5) 送给 部队 ， 送给 部队 多少 双 皮鞋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8397", "content": "一 辆 汽车 的 行驶 速度 为 90 千米 / 时 ， 行驶 585 千米 ， 用 了 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3688", "content": "乐 家 百货 运 来 苹果 和 橘子 各 40 箱 ， 苹果 每箱 18 千克 ， 橘子 每箱 25 千克 ． 这 两种 水果 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2453", "content": "44 / □ = 8 … 4 ， □ 最小 填 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4908", "content": "一 个数 的 (1/4) 是 (1/2) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14823", "content": "男 学生 人数 占 女 学生 的 40% ， 那么 女 学生 人数 占 男 学生 的 多少 %", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16363", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行驶 了 60 千米 ， 还 剩下 全程 的 40% ， 求 还 剩 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12248", "content": "甲 是 乙 的 (2/7) ， 那么 乙 比 甲 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7219", "content": "某 电器 股份 有限公司 去年 生产 移动电话 450 万部 ， 比 计划 增产 50 万部 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19809", "content": "一年级 一班 有 37 位 同学 在校 吃 中餐 ， 二 班 有 25 位 学生 在校 吃 中餐 ， 3 班 有 38 位 学生 在校 吃 中餐 ， 一年级 共有 多少 学生 在校 吃 中餐 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16129", "content": "新华书店 上午 卖书 219 本 ， 下午 卖出 的 书 是 上午 的 (2/3) ， 下午 卖 了 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16999", "content": "校园 里 有 柳树 84 棵 ， 比 桃 数多 26 棵 ， 苹果树 的 棵 树 是 桃树 的 3 倍 ， 校园 里 有 苹果树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3368", "content": "(1/10) 的 倒数 除以 10 ， 商 = ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5305", "content": "为 庆祝 “ 少代会 ” 召开 ， 同学 们 要 做 180 面 小旗 ， 已经 做 了 (5/6) ， 还有 几面 没 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19321", "content": "一 本书 ， 笑笑 已 读 45% ， 未 读 的 页数 比 已 读 的 页数 多 17 页 ， 全书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14220", "content": "把 19 本 练习本 平均 分给 多少 个 同学 ， 每人 分 到 2 本 ， 还 余 1 本 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14195", "content": "学校 买来 8 张 办公桌 和 12 把 椅子 ， 共 花 去 8176 元 ， 已知 每 把 椅子 158 元 ， 每张 桌子 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18270", "content": "动物园 上午 有 游客 534 人 ， 中午 有 236 人 离去 ． 下午 又 来 了 307 人 ， 这时 园内 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22733", "content": "甲 、 乙 两 人 4 小时 共同 加工 3600 个 机器 零件 ， 已知 甲 5 小时 可以 加工 1900 ， 乙 每 小时 加工 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14939", "content": "特快 列车 4 小时 行驶 640 千米 ， 一辆 汽车 每 小时 行驶 80 千米 ． 特快 列车 行驶 的 速度 是 汽车 行驶 速度 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22008", "content": "修 一条 长 1800 米 的 水渠 ， 8 天 修 了 全长 的 (2/5) ， 用 同样 的 速度 ， 修 完 剩下 的 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13394", "content": "38 * 3.67 与 11.33 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17617", "content": "苹果 有 2 个 ， 梨 有 5 个 ， 吃 到 苹果 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20973", "content": "两个 数 相差 28 ， 如果 被减数 减少 3 ， 减数 增加 5 ， 那么 它们 的 差 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1527", "content": "一 个 小孩 体内 所 含 的 水分 有 24 千克 ， 占 体重 的 (4/5) ， 这个 小孩 的 体重 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3786", "content": "奥 奥 家 房屋 总面积 是 127.8 平方米 ， 3 个 卧室 的 面积 和 是 48.9 平方米 ， 卫生间 、 厨房 、 阳台 等 的 面积 和 是 30.6 平方米 ． 其余 的 是 客厅 ， 客厅 的 面积 = ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21801", "content": "一 件 衣服 打 0.8 后 售价 96 元 ， 这件 衣服 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5470", "content": "一 个 平行四边形 的 面积 是 48 平方厘米 ， 底 是 12 厘米 ， 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23007", "content": "公园 的 露天剧场 有 4 个 同样 的 看台 ， 每个 看台 有 11 排 椅子 ， 每排 21 个 座位 ， 露天剧场 共有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7023", "content": "李师傅 带 了 800 元 到 市场 ， 先买 了 224 元 蔬菜 ， 余下 的 钱 刚好 买 了 18 袋 大米 ， 每 袋 大米 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14540", "content": "被减数 比 差 大 5.8 ， 减数 比 被减数 小 4.3 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8371", "content": "9229 + 8338 + 7447 + 6556 + 5665 + 4774 + 3883 + 2992 = ．", "knowledge": ["+"], "difficulty": 0.6, "length": 15}
-{"question_id": "10425", "content": "甲 、 乙 两地 相距 480 千米 ， 甲 车 以 每 小时 60 千米 的 速度 从 甲地 出发 ， 同时 乙 车 以 每 小时 80 千米 的 速度 从 乙地 出发 ， 乙 车 比 甲 车 早 到 终点站 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5267", "content": "一 只 老虎 重 182 千克 ， 一只 熊 的 重量 是 这 只 老虎 的 3 倍 ， 这 只 熊 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18075", "content": "用 一个 棱 长 是 0.5 米 的 正方形 钢 柸 锻造 成 一个 截面 是 边长 0.2 米 的 正方形 的 长方体 钢材 ， 钢材 的 长 = ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21157", "content": "某 实验 小学 去年 共 评出 3 好 学生 124 人 ， 它 的 (3/8) 正好 是 全校学生 人数 的 (3/70) ． 该 实验 小学 共有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10807", "content": "一 包 纸 有 4000 张 ， 用 去 了 (5/8) ， 还 剩下 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "567", "content": "24 比 1554 / 37 的 商 少 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5473", "content": "爸爸 的 体重 为 86 千克 ， 是 小 红 的 4 倍 ． 小 红 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6216", "content": "学校 运动会 ， 一年级 参加 比赛 的 人数 有 60 人 ， 比 二年级 的 人数 少 25% ， 二年级 参加 比赛 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6017", "content": "六年级 参加 数学 小组 的 有 36 人 ， 语文 小组 的 人数 是 数学 小组 的 (3/4) ， 体育 小组 的 人数 是 语文 小组 的 (2/3) ， 体育 小组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7501", "content": "小 明 家 有 工具书 12 本 ， 工具书 是 故事书 的 (4/5) ， 故事书 是 连环画 的 (1/3) ， 小 明 家 有 连环画 多少 本 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4808", "content": "一 件 商品 打 0.8 是 56 元 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15684", "content": "一 本 故事书 的 单价 是 28 元 ， 一本 童话 书 的 单价 比 故事书 贵 (1/7) ． 一本 童话 书 的 单价 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13317", "content": "将 一根 2 米 长 的 绳子 平均 截 成 5 段 ， 每 段长 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6334", "content": "111 + 222 + 333 + 444 + 555 + 667 * 5 = ．", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "21572", "content": "一 个数 减去 3.5 与 4 的 积 ， 差 是 5.7 ． 求 这个 数 ． 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10217", "content": "多少 的 5 倍 是 125 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6363", "content": "果园 里 有 120 棵 桃树 ， 桃树 的 棵 数 是 梨树 的 (5/6) ， 梨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17624", "content": "一 根 水管 ， 第一次 截去 全长 的 (1/4) ， 第 二 次 截去 余下 的 (1/3) ， 共 截去 全长 的 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19071", "content": "仓库 里 有 25 吨 钢材 ， 第一次 用 去 总数 的 20% ， 第 二 次 用 去 (1/2) 吨 ， 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7076", "content": "志 超 (1/8) 小时 步行 (3/4) 千米 ， 他 步行 l 千米 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21406", "content": "服装店 商务 卖出 服装 48 套 ， 下午 卖出 服装 56 套 ， 下午 比 上午 多 收 货款 1480 元 ， 平均 每套 服装 要 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10256", "content": "小 明 把 自己 画片 的 (1/6) 给 妹妹 ， 这时 妹妹 的 画片 数 正好 是 小 明 的 (3/5) ， 已知 妹妹 原有 画片 17 张 ， 小 明 原有 画片 多少 张 ？ （ 列式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8538", "content": "爷爷 今年 80 岁 ， 小 亮 的 年龄 是 爷爷 的 (1/5) ， 小 亮 今年 多 大 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9254", "content": "百货 超市 1 月份 的 营业额 是 14 万元 ， 如果 按 营业税 率 5% 缴纳 营业税 ， 这家 超市 应 缴纳 营业税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8670", "content": "有 一杯 糖水 ， 糖 与 水 的 比 是 1 ： 20 ， 如果 再 加入 2 克 糖 ， 这 杯 糖水 重 44 克 ， 求 糖水 中 水 的 重量 = 多少 克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6267", "content": "在 一条 公路 一边 从头至尾 每隔 6 米 架设 一根 电线杆 ， 共用 51 根 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16253", "content": "果园 里 有 梨树 270 棵 ， 苹果树 比 梨树 多 140 棵 ， 梨树 和 苹果树 一共 有 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8441", "content": "计算 （ 1350 + 249 + 468 ） + （ 251 + 332 + 1650 ） = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "19315", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 (1/4) ， 第 二 小时 行 了 60 千米 ， 这时 已 行 路程 与 剩下 路程 的 比 是 1 ： 2 ， 甲 、 乙 两地 路程 的 全长 = 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10421", "content": "甲 、 乙 两城 间 的 公路 长 150 千米 ． 一辆 汽车 从 甲 城 开往 乙 城 ， 行 了 全程 的 (3/5) ， 离 乙 城 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2234", "content": "某 影院 放映 《 变形金刚 2 》 的 第一场 共 卖出 525 张 票 ， 每张 票价 55 元 ， 则 这 一场 门票 一共 收 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "106", "content": "一 根 木料 ， 第一次 用 去 全长 的 (3/8) ， 第 二 次 用 去 2.2 米 ， 两次 共用 全长 的 (5/6) ， 第一次 用 去 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14966", "content": "六年级 的 同学 们 做操 ， 每行 站 12 人 ， 正好 站 10 行 ． 现在 老师 要求 改为 站 8 行 ， 平均 每行 站 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10655", "content": "若 甲 数 是 乙 数 的 (1/2) ， 则 乙 数 是 甲 数 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7359", "content": "一 套 奥运 纪念币 的 原价 是 200 元 ， 现在 上涨 了 (1/8) ， 上涨 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3846", "content": "杉树 的 成活率 是 95% ， 今年 植树节 植树 成活 了 285 棵 ， 求 一共 植 了 多少 棵 树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11932", "content": "同学 们 到 果园 里 参加 劳动 ， 收 了 6 筐 橘子 ， 连 筐 重 94 千克 ， 每个 筐 重 2 千克 ， 同学 们 一共 收 了 多少 千克 橘子 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20364", "content": "学校 买来 一批 新书 ， 其中 科技 书 有 124 本 ， 比 文艺 书 的 3 倍 还 多 19 本 ， 文艺 书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7514", "content": "萍 萍 水果店 运 来 一批 水果 ， 当 卖出 90 箱 时 ， 刚好 卖 了 这 批 水果 的 (5/6) ， 还 剩 多少 箱 水果 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17059", "content": "卡车 第一天 运 货物 11 吨 ， 第 二 天 比 第一天 多 运 货物 5 吨 ． 这辆 卡车 两天 共运 货物 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16102", "content": "两辆车 从 甲乙 两地 相对 开出 ， 甲 车 每 小时 行 45 千米 ， 乙 车 每 小时 行 50 千米 ， 甲 车 出发 3 小时 后 ， 乙 车 才 出发 ． 4 小时 后 两车 相遇 ， 两地 相距 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "1282", "content": "两个 数 的 差 是 546 ， 其中 较 小 的 数 是 119 ， 较大 的 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7604", "content": "6 年 一班 有 学生 40 人 ， 一次 数学考试 ， 前 15 名 的 平均分 比 全班 平均分 高 10 分 ， 其余 同学 的 平均分 比 全班 平均分 低 多少 分 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16875", "content": "某 服装厂 加工 一批 西服 ， 第一天 加工 总数 的 25% ， 第 二 天 加工 总数 的 (1/3) ， 第 3 天 加工 840 套 ， 刚好 加工 完 ， 这 批 西服 共有 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18826", "content": "6.8 / 3.2 的 商 ， 减去 4.25 与 0.5 的 积 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5298", "content": "修路 队 修 一条 公路 ， 第一天 修 了 53.4 千米 ， 比 第 二 天 多 修 了 10.6 千米 ， 两天 共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15389", "content": "一 种 商品 ， 原价 多少 元 ， 加价 10 元 后 ， 在 降价 10% ， 结果 卖 99 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21886", "content": "花布 的 长度 比 白布 多 (1/4) ， 是 把 多少 看作 单位 “ 1 ” ， 花布 的 长度 是 白布 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18769", "content": "洗衣机 里 有 5 千克 的 衣物 ， 每千克 衣物 要 用 (1/2) 勺 洗衣粉 ． 一共 需要 放 几勺 洗衣粉 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3147", "content": "小 华 从 甲地 步行 去 乙地 ， 第一天 行 了 全程 的 20% ， 第 二 天 行 了 全程 的 (1/4) ， 离 终点 还有 22 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12099", "content": "三年级 同学 去 秋游 ， 男生 共有 175 人 ， 女生 共有 169 人 ． 每 8 个 同学 分 1 组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12288", "content": "某 施工队 架设 电线 ， 前 3 天 架设 132.9 米 ， 后 4 天 架设 196.8 米 ． 平均 每天 架设 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22194", "content": "盒子 里 有 3 个 红球 、 2 个 黄 球 和 1 个 白 球 ， 球 除 颜色 外 完全相同 ， 从 里面 随便 摸 出 一个 ， 摸 出 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10267", "content": "某校 六年级 有 学生 150 人 ， 男生 占 其中 的 (3/5) ． 六年级 有 多少 男生 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2936", "content": "一 根 铁丝 ， 第一次 截下 (3/8) 米 ， 第 二 次 截下 (2/8) 米 ， 两次 一共 截下 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8070", "content": "实验 小学 开展 课外活动 ， 全校学生 的 (4/13) 参加 文艺 班 ， (2/13) 参加 书法 班 ， 美术班 和 文艺 班 的 人数 同样 多 ． 剩下 的 参加 武术 班 ， 参加 武术 班 的 人数 占 全校 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19091", "content": "一 个数 的 (2/3) 是 24 ， 这个 数 的 倒数 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12729", "content": "一 袋 白糖 40 千克 ， 用 了 (3/5) 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10767", "content": "哥 弟 俩 共有 邮票 70 张 ， 如果 哥哥 给 弟弟 4 张 邮票 后 还 比 弟弟 多 2 张 ， 哥哥 原来 有 邮票 多少 张 ？ （ 写出 过程 ）", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21542", "content": "(1/3) 里面 有 多少 个 (1/18) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12362", "content": "张 叔叔 的 一项 创造发明 ， 得到 了 15000 元 的 科技 成果奖 ． 按规定 应 缴纳 20% 的 个人所得税 ． 张 叔叔 实际 得到 奖金 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1956", "content": "小 刚 和 小强 各 有 一些 邮票 ， 小 刚 说 ： “ 你 的 邮票 张 数 比 我 少 (1/4) ” ， 小强 说 ： “ 要是 你 能 给 我 16 张 邮票 ， 我 就 比 你 多 2 张 了 ！ ” ． 小 刚 原有 邮票 多少 张 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21181", "content": "贝 贝 计算 一道 乘法 算式 时 ， 把 其中 一个 乘数 6 看成 了 9 ， 算 出 的 积 是 108 ， 正确 的 积 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15619", "content": "汽车 销售商 下半年 卖出 480 辆 汽车 ， 比 上半年 增加 了 (1/4) ， 上半年 卖出 了 多少 辆 汽车 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2164", "content": "商店 有 大米 210.6 千克 ， 卖出 109.8 千克 ， 又 运进 107.5 千克 ， 这时 商店 有 大米 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6726", "content": "10 个 小朋友 按 1 ～ 3 的 顺序 循环 报数 ， 报 双数 的 离队 ， 队伍 还 剩 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16509", "content": "用 长 31.4 厘米 ， 宽 15 厘米 的 长方形 卷 成 一个 圆柱形 ， 圆柱形 的 侧 面积 = 多少 厘米 ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "347", "content": "两个 数 的 差 是 539 ， 减数 是 761 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8572", "content": "一 根 木料 长 16 米 ， 把 它 锯 成 4 米 长 的 小 段 ， 每 锯下 一段 要 3 分钟 ， 把 这根 木料 全部 锯 完 要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6318", "content": "幼儿园 购进 50 米 布 做 演出服 ， 如果 每套 演出服 用布 2.2 米 ， 做 18 套 后 ， 还 剩下 多少 米 布 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3372", "content": "某 商店 一天 卖出 成人 服装 120 套 ， 比 儿童服装 少卖 (3/5) ． 这天 卖 了 多少 套 儿童 装 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13855", "content": "给 一块 48 公顷 的 水田 插秧 ， 24 天 插 完 ， 按 同样 的 速度 ， 给 一块 14 公顷 的 水田 插秧 ， 要 用 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19115", "content": "一 根 绳子 ， 第一次 用 去 (2/7) ， 第 二 次 用 去 (3/7) ， 两次 用 去 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18763", "content": "中 营 村 去年 修 了 2 条 水渠 ， 总长 604 米 ， 今年 修 的 水渠 长度 是 去年 的 3 倍 ． 今年 比 去年 多 修 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15072", "content": "学校 有 一块 3 公顷 的 苹果树 ． 占 果园 总面积 的 (3/4) ． 果园 总面积 = 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18984", "content": "一 个 长方体 的 水池 ， 长 5 米 ， 宽 4 米 ， 深 2 米 ． 在 水池 里 放入 36 立方米 的 水 ， 水深 = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5585", "content": "816 / 16 的 商 加上 13 与 28 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23145", "content": "时速 4 千米 的 a 追赶 时速 3 千米 的 b ， 两 人 相距 0.5 千米 时 ， 有 一只 蜜蜂 从 a 的 帽子 上 开始 来回 在 两 人 中间 飞 ， 只 飞 到 a 追 及 b 为止 ， 若 蜜蜂 时速 10 千米 ， 问 蜜蜂 飞 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1861", "content": "学校 有 女生 360 人 ， 比 男生 少 10% ， 学校 共有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3610", "content": "六年级 有 学生 150 人 ， 参加 体育 活动 小组 的 人数 占 全年 级 总 人数 的 (2/5) ， 是 参加 书法 小组 的 (4/3) ． 参加 书法 小组 的 人数 占 全年 级 总 人数 百分之几 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3065", "content": "一 瓶 饮料 ， 喝 了 300 毫升 ， 恰好 是 这 瓶 饮料 的 (3/5) ， 这 瓶 饮料 共 多少 毫升 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8718", "content": "一 个数 的 25% 正好 等于 0.6 与 1.2 的 积 ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10813", "content": "一 本 故事书 有 80 页 ， 小 明 每天 看 5 页 ， 看 了 7 天 ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18644", "content": "一 列 火车 从 甲地 开往 乙地 ， 速度 是 120 千米 / 小时 ， 出发 13 小时 后 离 乙地 还有 250 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13020", "content": "5 星 乡 果园 占地 20 公顷 ， 其中 的 (1/5) 种 苹果树 ， (1/4) 种 梨树 ， 剩下 的 地 种 橘子 ， 种 橘子 多少 公顷 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4059", "content": "小 明 身高 126 厘米 ， 是 堂弟 身高 的 2 倍 ， 而 叔叔 的 身高 比 堂弟 身高 的 3 倍 少 13 厘米 ． 叔叔 身高 多少 厘米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3158", "content": "720 与 160 的 和 ， 除以 84 与 40 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7263", "content": "王 伯伯 搞 写作 ， 一次 稿酬 所得 为 3000 元 ， 按规定 收入 超过 1000 元 的 部分 按 15% 缴纳 个人所得税 ， 缴 完税 后 他 实际 得 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13007", "content": "小 象 体重 670 千克 ， 比 象 妈妈 轻 280 千克 ， 象 妈妈 和 小 象 共 得 多少 千克 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16865", "content": "6 （ 一 ） 班 男生 有 24 人 ， 平均 身高 是 156 厘米 ， 女生 16 人 ， 平均 身高 是 152 厘米 ， 全班同学 的 平均 身高 = 多少 厘米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16668", "content": "现有 含 药 60% 的 消毒剂 2 千克 ， 需要 加 清水 配成 含 药 0.5% 的 药水 进行 消毒 ， 需加 清水 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11789", "content": "一 根 铁丝 先剪 去 它 的 (1/5) ， 再剪 去 它 的 (1/2) ， 还 剩下 这根 铁丝 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21995", "content": "河滩 的 一边 栽 了 45 棵 柳树 ， 每 两棵 柳树 之间 栽 2 棵 桃树 ， 栽 了 多少 棵 桃树 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13073", "content": "男生 有 20 人 ， 女生 人数 是 男生 的 3 倍 ， 女生 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1733", "content": "(2/7) / (1/2) 的 商 ， 减 (5/8) 的 (4/5) ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2983", "content": "师徒 两 人 加工 零件 ， 师傅 一周 能 加工 756 个 零件 ， 徒弟 7 天 能 加工 476 个 零件 ． 师傅 平均 每天 徒弟 多 加工 （ 多少 ） 个 零件 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20083", "content": "妈妈 买 了 一本 27.6 元 和 一本 15.9 元 的 书 ， 付出 50 元 ． 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15065", "content": "爸爸 今年 35 岁 ， 小 红 今年 10 岁 ． 4 年 后 ， 爸爸 比 小 红 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19794", "content": "小张 去年 挣 了 3.2 万元 ， 前年 比 去年 少 挣 10% ． 前年 挣 了 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21427", "content": "学校 有 630 人 参加 《 全国 中小学生 武术 健身操 - - 雏鹰展翅 》 比赛 ， 如果 每 70 人 站 成 一队 ， 可以 站 多少 队 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4285", "content": "印刷厂 在 装订 910 本 图书 ， 平均 每天 装订 90 本 ， 工作 多少 天 后 ， 还 剩下 190 本 没 完成 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20668", "content": "商店 售出 2 筐 苹果 ， 每 筐 24 千克 ． 占 售出 水果 总数 的 (6/11) ． 售出 的 梨 占 售出 水果 总数 的 (1/4) ． 商店 售出 梨 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13674", "content": "东明 小学 有 男生 637 人 ， 女生 比 男生 多 20 人 ， 东明 小学 共有 学生 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4914", "content": "学校 组织 六年级 同学 植树 ， 第一天 完成 了 任务 的 30% ， 第 二 天 又 完成 了 任务 的 45% ， 两天 正好 植树 300 棵 ． 六年级 同学 一共 要 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12202", "content": "一 个 工人 3 小时 做 120 个 零件 ， 照 这样 计算 ， 多少 小时 可 做 200 个 零件 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11280", "content": "土星 绕 太阳 转 1 周 需要 29.46 年 ， 那么 土星 绕 太阳 转 10 周 需要 多少 年 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1443", "content": "客车 和 货车 同时 从 相距 585 千米 的 两地 相对 开出 ， 客车 每 小时 行 79.5 千米 ， 经过 4.5 小时 两车 相遇 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9929", "content": "班里 图书 角 有 58 本 故事书 、 34 本 科普读物 ． 要 放在 一个 4 层 的 书架上 ， 平均 每层 要 放 多少 本书 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6044", "content": "一 列 火车 从 a 地 开往 b 地 ， 已经 行 了 全程 的 (3/5) ， 离 b 地 还有 100 千米 ． ab 两地 之间 的 铁路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11381", "content": "两列 火车 分别 从 ab 两地 相对 开出 ， 慢车 每 小时 行 55 千米 ， 快车 每 小时 行 65 千米 ， 两车 同时 行 了 1 小时 ， 刚好 行 了 全长 的 (3/5) ． 这时 慢 车行 了 全长 的 百分之几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1822", "content": "在 汶川 抗震救灾 的 日子 里 ， 志愿者 黄 医生 前 2 天 平均 每天 工作 18 小时 ， 后 5 天 一共 工作 了 83 小时 ， 这 一周 ， 黄 医生 平均 每天 工作 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9033", "content": "长沙 到 广州 的 铁路 长 728 km ， 一列 货车 从 广州 开往 长沙 ， 每 小时 行 71 km ． 一列 客车 从 长沙 同时 开往 广州 ， 4 小时 后 两车 相遇 ， 这 列 客车 的 速度 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1256", "content": "有 一批 货物 14.6 吨 ， 运走 一部分 ， 还 剩下 7.8 吨 没有 运 ， 已 运 了 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4525", "content": "六年级 有 女生 20 人 ， 是 男生 人数 的 (4/5) ， 全班 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3863", "content": "李师傅 加工 一批 零件 ， 已经 加工 好 了 390 个 ， 比 计划 的 (3/7) 少 60 个 ． 李师傅 计划 加工 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3924", "content": "兰兰 和 3 个 小朋友 折 星星 ， 一共 折 了 36 个 ， 平均 每人 折 多少 个 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20124", "content": "小巧 带 50 元 钱 去 买 面包 ， 她 买 的 是 每 只 5.5 元 的 豆沙包 ， 找回 11.5 元 ． 小巧 共 买 了 几只 豆沙包 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16283", "content": "实验 小学 合唱队 人数 是 美术组 的 (8/9) ， 体育组 人数 是 合唱队 的 (5/6) ， 美术组 有 54 人 ， 体育组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13093", "content": "甲乙 两地 相距 1464 千米 ， 一列 快车 从 甲地 开往 乙地 ， 行 了 全程 的 (5/8) ， 还要 行 多少 千米 才能 到达 乙地 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17801", "content": "三年级 同学 做操 排队 ， 如果 每行 有 12 人 ， 正好 排 6 行 ． 如果 排成 8 行 ， 每行 排 几 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17844", "content": "一 根 绳子 剪 去 180 米 后 ， 剩下 的 是 剪 去 的 4 倍 ， 这根 绳子 原来 长 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4700", "content": "果园 里 种 了 120 棵 桃树 ， 苹果树 的 棵 数 是 桃树 的 2 倍 ， 梨树 比 苹果树 少 26 棵 ， 果园 里 有 梨树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20948", "content": "幼儿园 小朋友 分 巧克力糖 ， 如果 每人 分 3 粒 ， 则 余 8 粒 ； 如果 每人 分 5 粒 ， 则 缺 28 粒 ｡ 小朋友 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11400", "content": "一 个 工人 一天 完成 一项 工程 的 (1/8) ， 他 工作 3 天 后 还 剩 全部 工程 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9651", "content": "体育 兴趣小组 买 了 3 个 小 足球 ， 付给 营业员 100 元 ， 找回 7 元 ， 每个 小 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "248", "content": "布袋 里 有 红 黑 球 各 10 个 ， 用 手 进去 摸 ， 至少 摸 多少 球 ， 可以 保证 摸 出 红球 的 (1/5) ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12347", "content": "一 个 小组 26 天工 做 了 226 个 花篮 ， 比 原 计划 多 做 了 18 个 ， 原 计划 每天 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18032", "content": "12 个 (5/6) 连 加 的 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14477", "content": "来 榜 辅导 小学 食堂 运 来 3 吨 大 柴 ， 上个月 用 去 这 堆 柴 的 (2/5) ， 这个 月 用 去 (1/2) 吨 ， 两个 月 一 共用 去 多少 吨 柴 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3471", "content": "一 种 毛衣 ， 原价 380 元 ， 现在 的 价钱 比 原来 降低 了 (3/19) ． 降低 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8514", "content": "修路 队 要 修 一条 公路 ， 已修 4500 米 ， 完成 了 总数 的 (3/8) ， 还要 修 多少 米 才能 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1258", "content": "一 批 货物 100 吨 ， 4 小时 运走 了 它 的 (4/5) ． 剩下 的 要 几小时 运 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9916", "content": "金 百利 印刷厂 生产 一批 挂历 ， 计划 每天 生产 250 本 ， 20 天 可以 完成 任务 ， 结果 16 天 就 完成 了 任务 ． 这样 平均 每天 完成 了 日 计划 的 百分之几 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5570", "content": "小 新 和 小 刚 从 家 去 学校 ， 他们 走 的 路程 之 比 是 6 ： 5 ， 所 走 的 路程 之 和 是 1100 米 ， 小 新 比 小 刚 多 走 了 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12037", "content": "某 小型 水电站 计划 投资 180 万元 ， 实际 比 计划 节约 (2/5) ， 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19696", "content": "汽车 的 辆数 相当于 自行车 辆数 的 (2/3) ． 汽车 有 40 辆 ， 那么 自行车 有 多少 辆 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22281", "content": "一 列 火车 32 小时 共 行驶 2481 千米 ， 已知 这 列 火车 先 以 每 小时 75 千米 的 速度 行驶 了 11 小时 ， 又 以 80 千米 的 速度 行驶 了 9 小时 ， 求 其余 时间 的 行驶 速度 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "5141", "content": "一 支 钢笔 24 元 ， 是 一支 圆珠笔 价钱 的 6 倍 ， 一支 钢笔 比 一支 圆珠笔 贵 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5209", "content": "乐乐 读 一本 世界名著 ， 平均 每天 读 14 页 ， 读 了 12 天 ， 发现 还有 19 页 没有 读完 ， 这本 世界名著 共有 多少 页 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16054", "content": "梅花鹿 高 1.46 米 ， 长颈鹿 的 身高 是 梅花鹿 身高 的 2.5 倍 还 多 0.98 米 ， 长颈鹿 的 身高 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5852", "content": "学校 图书馆 共有 16 个 书架 ， 每个 书架 摆放 图书 865 册 后 ， 还有 760 册 没 摆放 ． 学校 共有 图书 多少 册 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1620", "content": "新华书店 进来 一批 故事书 ， 上午 卖出 400 册 ， 下午 卖出 440 册 ， 这时 还 剩 这 批 故事书 的 (2/5) ． 还 剩 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4344", "content": "张师傅 加工 了 500 个 零件 ， 比 计划 多 100 个 ， 实际 比 计划 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16374", "content": "一 堆 煤 ， 第一天 运走 (2/5) ， 剩下 的 比 运走 的 多 30 吨 ， 运走 了 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16660", "content": "甲 、 乙 两队 合 修 一段 公路 ， 甲队 每天 完成 总数 的 (1/25) ， 乙 队 每天 完成 36 米 ， 经过 10 天 后 全部 完成 ， 这 段 公路 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10540", "content": "红叶 服装厂 为 东风 小学 学生 赶制 840 套 校服 ， 已经 做 了 6 天 ， 平均 每天 做 52 套 ， 剩下 的 要 在 8 天 内 完成 ， 剩下 的 平均 每天 应 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6967", "content": "如果 小 红 步行 (7/10) 小时 行 (14/15) 千米 ， 那么 她 (3/5) 小时 行 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18806", "content": "宝鸡 与 西安 相距 160 千米 ， 一辆 汽车 从 宝鸡 开 到 西安 用 了 2.5 小时 ， 返回 时 少 用 了 0.5 小时 ， 这辆 汽车 往返 的 平均速度 = 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20964", "content": "某 商场 举行 手机 促销 活动 ， 上午 售出 手机 180 只 ， 比 下午 多 售出 了 (1/5) 该 商场 上午 和 下午 共 售出 手机 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8031", "content": "一 农户家 有 18 只 小鸡 ， 小鸭子 的 数量 是 小鸡 的 3 倍 ， 该 农户家 有 多少 只 小鸭子 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19362", "content": "一 套 运动服 降价 (1/4) 后 ， 售价 240 元 ． 这 套 运动服 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "807", "content": "洗衣机 厂 要 生产 360 台 洗衣机 ， 原 计划 30 天 完成 ； 实际 每天 比 原 计划 多 生产 6 台 ， 实际 提前 几天 完成 任务 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11812", "content": "甲 、 乙 两 数 的 和 是 16 ， 这 两个 数 的 比 是 5 ： 3 ， 则 乙 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1470", "content": "运动会 上 ， 六年级 的 总分 是 64 分 ， 比 五年级 多 (1/7) ， 五年级 的 总分 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12113", "content": "苏宁 电器 商场 进 了 820 台 电视机 ， 已经 卖 了 47 天 ， 还有 350 台 没 卖完 ． 你 知道 苏宁 电器 商场 平均 每天 卖 多少 台 电视机 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22218", "content": "一 个数 的 (2/3) 是 270 ， 这个 数 的 45% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2511", "content": "3.75 是 2.5 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1815", "content": "一 根 绳子 4 米 ， 用 去 1.6 米 ， 还 剩下 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12374", "content": "有 大 汽车 6 辆 ， 小汽车 的 数量 是 大 汽车 的 30 倍 ， 小汽车 有 多少 辆 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19932", "content": "红星 小学 举行 运动会 ， 5 （ 2 ） 班 同学 每人 都 参加 了 一项 ． 其中 参加 径赛 的 占 全班 人数 的 (3/14) ， 参加 田赛 的 占 全班 人数 的 (2/7) ， 其余 的 参加 体操 表演 ． 参加 体操 表演 的 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12688", "content": "农具厂 计划 25 天 生产 农具 400 件 ， 实际 提前 5 天 完成 ， 实际 平均 每天 生产 农具 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22820", "content": "一 本 360 页 的 童话 书 ， 小 刚 用 20 天 读完 ， 小 芳 用 30 天 读完 ． 小 刚 平均 每天 比 小 芳 多 读 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6150", "content": "有 甲 、 乙 两家 商店 ， 如果 甲 店 的 利润 增加 20% ， 乙 店 的 利润 减少 10% ， 那么 这 两 店 的 利润 就 相同 ， 原来 甲 店 的 利润 是 原来 乙 店 的 利润 的 百分之 多少 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17159", "content": "9 + 99 + 999 + 9999 + 99999 + 999999 = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "3008", "content": "超市 苹果 售价 每千克 7.8 元 ， 小 丽 买 了 5 千克 ， 小 杰 买 的 苹果 的 千克 数 是 小 丽 所 买 的 (2/3) ， 两 人 各自 付钱 ， 小 杰 付给 收银员 一张 50 元 的 人民币 ， 收银员 应 找 小 杰 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1547", "content": "一 架飞机 每 小时 飞行 730 千米 ， 从 甲地 飞往 乙地 用 了 12 小时 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3762", "content": "小 红 录入 一份 稿件 ， 录入 了 (5/7) 后 还 剩 700 字 ， 这份 稿件 共有 多少 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7438", "content": "两个 数 有 共同 的 质因数 2 和 7 ， 它们 的 最大公约数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17687", "content": "果园 有 苹果树 1200 棵 ， 梨树 的 棵 数 比 苹果树 的 2 倍 多 80 棵 ． 梨树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12611", "content": "小 红 的 妈妈 上 月 应纳 的 所得税 额 是 500 元 ， 如果 按 5% 的 税率 缴纳 个人所得税 ， 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14941", "content": "房间 里 有 10 支 点燃 的 蜡烛 ， 风 从 窗外 吹 来 ， 吹灭 了 2 支 ， 接着 又 吹灭 了 1 支 ， 后来 主人 关 好 了 窗户 ． 第 二 天 打开 房间 ， 房 内 还有 几支 蜡烛 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11251", "content": "把 甲 仓库 存粮 的 (1/5) 调入 乙 仓库 ， 两 仓库 存粮 相等 ， 原来 乙 仓库 的 存粮 是 甲 仓库 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16550", "content": "大 脸 猫 抓 到 了 一些 鱼 ， 却 因为 看管 不慎 ， 被 蓝皮 鼠 偷走 了 60% ， 它 数 了 数 剩下 的 鱼 ， 发现 只有 30 条 了 ， 那么 被 蓝皮 鼠 偷走 了 多少 条 鱼 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16378", "content": "上海 世博园 内 最高点 是 “ 世博 和谐 塔 ” ， 原来 是 火电厂 的 烟囱 ， 高度 是 165 米 ， 经过 改造 后 高度 增加 了 (12/55) ， 现在 塔 的 高度 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "647", "content": "水果店 有 桔 了 72 千克 ， 比 香蕉 少 (1/9) ， 香蕉 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12779", "content": "王师傅 买 了 2000 元 的 国家 建设 债券 ， 定期 3 年 ， 年利率 12% ， 还要 付 20% 的 税款 ， 到期 时 他 可以 获得 本息 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "1794", "content": "宏 城 超市 运进 20 千克 苹果 ， 30 千克 桃子 ， 桃子 是 苹果 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6407", "content": "桃树 120 棵 ， 梨树 5 行 ， 每行 38 棵 ， 桃树 和 梨树 一共 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14418", "content": "王 华 买 《 趣味 数学 》 和 《 故事 大王 》 各 5 本 ， 一 共用 了 20 元 ． 每 本 《 趣味 数学 》 2.6 元 ， 每 本 《 故事 大王 》 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6119", "content": "用 一张 长 4.5 分 米 ， 宽 1.2 分 米 的 长方形 铁皮 制成 一个 圆柱 ， 这个 圆柱 的 侧 面积 最 多 = 多少 平方分米 ． （ 接口处 不计 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "714", "content": "甲 数 比 乙 数 少 甲 数 的 (1/4) ， 那么 乙 数 是 甲 数 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15508", "content": "服装厂 原来 计划 要 做 60 套 童装 ， 每套 用布 160 厘米 ， 实际 每套 用布 150 厘米 ， 这些 布 现在 比 原来 可 多 做 多少 套 童装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14355", "content": "光 和 青少年宫 准备 给 长 50.8 米 、 宽 30 米 的 剧场 铺地砖 ． 如果 用 每块 0.4 平方米 的 方砖 铺 地 ， 需要 这种 方砖 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1995", "content": "某 养鸡场 养 公鸡 2400 只 ， 养 的 母鸡 比 公鸡 多 (3/8) ， 公鸡 、 母鸡 共 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16449", "content": "小 红 的 体重 是 25 千克 ， 奶奶 的 体重 是 她 的 3 倍 ， 奶奶 和小红 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7062", "content": "张 亮 练习 打字 ， 他 每分钟 可以 打字 32 个 ， 照 这样 计算 ， 他 40 分钟 可以 打字 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4818", "content": "修 一条 567 米 长 公路 ． 已经 修 了 187 米 ， 剩下 的 计划 每天 修 76 米 ， 还 需要 几天 可以 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16330", "content": "张师傅 用 一根 不锈钢管 制作 防盗门 ， 第一次 截去 (3/5) ， 第 二 次 又 截去 (1/5) 米 ， 这时 还 剩下 (7/10) 米 ， 那么 这根 钢管 原来 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10034", "content": "某 工厂 运 来 一批 煤 ， 计划 每天 烧 5 吨 ， 可以 烧 90 天 ． 实际 每天 烧 4.5 吨 ， 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8531", "content": "某县 去年 计划 植树 面积 为 120 公顷 ， 实际 植树 150 公顷 ， 超额 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15383", "content": "115 比 一个 数 的 2 倍 少 25 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "27", "content": "一 辆 压路机 每分钟 行驶 50 米 ， 压路 的 宽度 为 3 米 ． 如果 行驶 压路机 12 分钟 ， 可以 压路 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22249", "content": "比 3.7 的 1.2 倍 多 0.8 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5222", "content": "一 块 菜地 的 (5/9) 种 黄瓜 ， 剩下 的 种 茄子 ， 种 茄子 的 地 占 整块 菜地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11368", "content": "小 冬 家 离 电影院 80 米 ， 一次 他 去 看 电影 ， 走 了 10 米 ， 想起 忘记 带 电影票 ， 又 马上 回家 取 ， 然后 回到 电影院 ， 他 一共 走 了 多少 米 路 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9196", "content": "学校 组织 羽毛球 比赛 ， 6 （ 1 ） 班 有 4 名 男生 和 3 名 女生 参加 ， 如果 要 一男一女 搭配 ， 一共 有 多少 种 不同 的 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22917", "content": "红白 村 要 修 一条 水渠 ， 原 计划 每天 修 30 米 ， 72 天 完成 ． 为了 预防 洪水 提前 到来 ， 现在 要 60 天 完成 ， 每天 应 修 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11516", "content": "学校 买来 24 张 办公桌 和 30 张 椅子 共用 去 8160 元 ， 已知 一张 办公桌 的 价格 相当于 3 把 椅子 的 价格 ， 那么 每张 椅子 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13095", "content": "科技馆 今天 接待 观众 802 人 ， 比 昨天 接待 人数 的 (5/4) 多 2 人 ． 昨天 接待 了 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7259", "content": "桃树 比 苹果树 多 56 棵 ， 桃树 是 苹果树 的 (5/3) ， 桃树 和 苹果树 共有 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "13035", "content": "比 一个 数 的 60% 少 4.8 的 数 是 11.2 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11077", "content": "一 堆 煤 ， 每天 用 去 (1/9) 吨 ， 3 天一 共用 去 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16719", "content": "有 30% 的 盐水 60 千克 ， 将 它 蒸发掉 一些 水分 之后 浓度 变为 了 40% ， 那么 此时 总 重 还有 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "112", "content": "海安 同济 大 药房 一种 药品 ， 降价 12 元 后 ， 现在 的 售价 比 原来 降低 了 (2/7) ． 这种 药品 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20378", "content": "水果店 卖出 梨 756 千克 ， 卖出 的 橘子 比 梨 多 127 千克 ， 卖出 橘子 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1736", "content": "学校 田径队 有 45 人 ， 足球队 的 人数 是 田径队 的 (2/3) ， 文艺 队 人数 是 足球 的 (5/6) ， 文艺 队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12497", "content": "六年级 有 女生 70 人 ， 比 男生 人数 的 (8/9) 少 2 人 ， 六年级 共有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13139", "content": "秦 利 涛 家 有 一块 稻田 ， 今年 收 稻谷 900 千克 ， 比 去年 增产 了 100 千克 ． 这块 稻田 今年 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7478", "content": "东方 小学 建 一幢 教学楼 ， 实际 造价 45 万元 ， 比 计划 节约 10% ． 原 计划 造价 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2687", "content": "李 明 看 一 本书 ， 第一天 看 了 55 页 ， 第 二 天 看 了 65 页 ， 两天 看 的 页数 正好 占 总 页数 的 60% ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14946", "content": "北京 和 上海 相距 1320 km ． 甲乙 两列 直快 火车 同时 从 北京 和 上海 相对 开出 ， 6 小时 后 两车 相遇 ， 甲 车 每 小时 行 120 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "387", "content": "“ 5 • 一 ” 节 济南 某 商场 对 一种 原价 为 6600 元 的 电脑 实施 打 0.8 降价 促销 活动 ， 节后 商场 又 提高 了 20% 销售 ． 问 这种 电脑 现价 为 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11729", "content": "镇海 雅乐 学校 一年级 和 二年级 共 200 人 ， 三年级 和 四年级 共 250 人 ， 二年级 和 三年级 共 220 人 ， 一年级 和 四年级 共 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10113", "content": "装配车间 装配 一批 机床 ， 原 计划 每天 装配 52 台 ， 15 天 完成 ， 改进 工艺 后 ， 实际 只用 了 10 天 完成 任务 ， 实际 每天 比 原 计划 每天 多 装配 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22798", "content": "一 本书 ， 看 了 (3/5) ， 还 剩 38 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4056", "content": "用 两个 长 3 厘米 、 宽 2 厘米 、 高 1 厘米 的 长方体 ， 拼成 一个 表面积 最小 的 长方体 ， 这个 长方体 的 表面积 = 多少 平方厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "22193", "content": "弟弟 有 14 元 钱 ， 哥哥 有 10 元 钱 ， 哥哥 给 弟弟 多少 元 钱 后 ， 弟弟 的 钱 正好 是 哥哥 的 3 倍 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22557", "content": "小 明 打 一篇 文章 ， 已 打 了 900 个 字 ， 还 剩 (2/5) 没有 打 完 ， 这 篇文章 一共 有 多少 字 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1583", "content": "五年级 有 学生 120 人 ， 相当于 六年级 学生 人数 的 (3/4) ， 六年级 一共 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "45", "content": "一 台 电视机 原价 1600 元 ． 提价 (3/10) 后 又 降价 (1/5) ． 现在 电视机 卖 多少 钱 一台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7977", "content": "0.3 / 3.8 ， 商 是 12 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3031", "content": "一 个 电饭煲 原价 220 元 ， 现价 154 元 ， 电饭煲 的 价格 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16250", "content": "一 个 除法 算式 中 ， 除数 是 9 ， 商 是 107 ， 余数 是 5 ， 求 被除数 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21713", "content": "一 条 走廊 长 48 米 ， 每隔 3 米 放 一 盆花 ， 走廊 的 两端 不 放 ， 一共 要 放 多少 盆花 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22470", "content": "妈妈 有 97.2 元 ， 买 了 5 千克 白菜 ， 每千克 1.7 元 ， 问 还 剩 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6383", "content": "一 辆 汽车 运 290 箱 面包 ， 送给 7 个 零售店 后 ， 还 剩 10 箱 ， 平均 每个 零售店 送 几箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21184", "content": "小 亮 家 上个月 用电 35.2 度 ， 他们 家 有 4 个人 ， 如果 每 度 电 2.8 元 ， 平均 每人 付 电费 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11991", "content": "运输队 接到 一个 长途运输 任务 ， 要 从 a 地 运送 一批 货物 到 和 a 地 相距 1200 千米 的 b 地 ， 运输车 6 小时 行 了 全长 的 (3/8) ， 照 这样 的 速度 ， 还 需要 多少 小时 才能 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "546", "content": "科技馆 今天 接待 游客 620 人 ， 比 昨天 接待 人数 的 (7/8) 少 10 人 ． 昨天 接待 了 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13598", "content": "17.5 吨 比 20 吨 少 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4958", "content": "某 化学品 店 一种 硫酸 溶液 是 将 硫酸 和 水 按 1 ： 9 配制 的 ， 根据 这些 信息 ， 你 能 知道 什么 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1367", "content": "学校 航模 组 人数 是 生物 组 的 (4/5) ， 生物 组 人数 是 美术组 的 (1/3) ， 航模 组 有 8 人 ， 美术 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21077", "content": "华 地 广场 一台 电视机 现价 2000 元 ， 比 原价 降低 了 20% ， 降低 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11821", "content": "小 明 从 青岛 坐车去 上海 ， 用 了 10 个 小时 ， 每 小时 行 72 千米 ． 返回 时 小 明 坐火车 ， 只用 了 8 个 小时 ， 火车 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12794", "content": "博闻 小学 的 宣传栏 有 8 平方米 ， 所用 玻璃 每平方米 16.5 元 ， 买 玻璃 一共 需要 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19599", "content": "平原 机械厂 计划 每天 生产 56 个 机器 零件 ， 28 天 完成 ． 实际 每天 多 生产 42 个 ， 实际 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15792", "content": "84 被 一个 数 除 ， 商 和 余数 都 是 7 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17287", "content": "台 织布机 2.7 小时 织布 405 米 ， 平均 每 台 织布机 每 小时 织布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14420", "content": "爸爸 今年 32 岁 ， 4 年 后 儿子 的 年龄 比 爸爸 的 (1/3) 还 多 1 岁 ， 儿子 今年 多少岁 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "821", "content": "妈妈 上街 买 菜花 了 34.20 元 ， 还 剩下 15.80 元 ． 妈妈 带 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11519", "content": "建筑工地 运 水泥 ， 上午 运 来 水泥 170 吨 ， 下午 运 来 的 比 上午 运 的 2 倍 还 多 85 吨 ． 下午 比 上午 多 运 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8912", "content": "一 个 长方体 容器 ， 底面 长 2 分 米 ， 宽 l . 5 分 米 ， 高 l 分 米 ， 将 一块 石块 放入 容器 中 水面 升高 0.2 分 米 ， 这个 石头 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16527", "content": "林场 小学 生物 小组 的 同学 收集 标本 ， 收集 到 的 蝴蝶 标本 是 蜻蜓 的 (3/4) ， 甲壳虫 是 蜻蜓 的 (1/2) ． 蝴蝶 标本 有 12 只 ， 甲壳虫 有 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19882", "content": "甲 数 的 (1/3) 与 乙 数 的 (1/6) 相等 ， 甲 数 是 90 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14661", "content": "从 翠 峰 到 昆明 有 98 千米 ， 一辆 货车 从 翠 峰 以 每 小时 40 千米 的 速度 开往 昆明 ， 同时 一辆 客车 从 昆明 开往 翠 峰 ， 客车 的 速度 是 货车 的 1.5 倍 ， 进 过 几小时 后 货车 和 客车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17990", "content": "王 叔叔 凭 会员卡 在 新兴 书店 ， 以 0.95 购 了 一套 《 少年 百科全书 》 ， 便宜 了 6 元 ， 这 套书 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13797", "content": "有 一块 面积 (7/8) 顷 的 地 ， 用 总面积 (1/4) 种 蔬菜 ， (2/5) 种 粮食 ， 其余 的 种 果树 ． 种 果树 的 面积 占 总面积 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11420", "content": "（ 多少 + 400 ） / 2 = 500 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18824", "content": "一 根 6 米 长 的 铁丝 ， 第一次 用 去 2.4 米 ， 第 二 次 用 去 1.5 米 ． 剩下 的 比 原来 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11423", "content": "爸爸 每天 看 一 本书 的 (1/5) ， 多少 天 可以 看 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15305", "content": "小 明 上楼 的 速度 是 爷爷 的 2 倍 ， 当 爷爷 上 到 3 楼 时 ， 小 明 上 到 多少 楼 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18446", "content": "李老师 给 学校 买 图书 用 了 139 元 ， 买 体育器材 用 了 97 元 ， 他 带 了 300 元 钱 ， 现在 还 剩下 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15053", "content": "一 个 圆柱 的 侧 面积 是 62.8 cm ^ 2 ， 高 是 4 cm ， 这个 圆柱 的 底面 半径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "516", "content": "甲乙 两队 合 修 一条 长 (5/6) 千米 的 水渠 ， 甲队 修 了 全长 的 (1/6) ， 乙 队 比 甲队 多 修 了 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2324", "content": "人民 公园 原来 有 30 条 船 ， 每天 收入 540 元 ． 照 这样 计算 ， 现在 有 45 条 船 ， 每天 可 多 收入 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8098", "content": "张 明 乘车 从 甲地 到 乙地 3 小时 行驶 了 255 千米 ， 照 这样 的 速度 ， 张 明 8 小时 可以 到达 乙地 ． 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16991", "content": "妈妈 买来 20 个 苹果 ， 全家 第一次 吃 了 7 个 ， 第 二 次 吃 了 5 个 ． 两次 一共 吃 了 多少 个 苹果 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20051", "content": "一 种 农具 现在 每件 成本 是 126 元 ， 现在 每件 成本 比 原来 降低 (7/25) ， 现在 每件 成本 比 原来 降低 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10975", "content": "四年级 一班 共有 41 名 同学 ， 期末 质量 调研 检测 全班 数学 平均 91 分 ， 这个 班 数学 总分 大约 = 多少 分 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7006", "content": "张 红 体重 35 千克 ， 刘 江 比 张 红 轻 2 千克 ， 他俩 体重 平均 多少 千克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10612", "content": "一 个 长方体 铁皮 水箱 ， 容积 是 60 l ， 高 是 4 dm ， 它 的 底 面积 = 多少 dm ^ 2 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14431", "content": "沪宁 调整 公路 自 上海 经 无锡 至 南京 ， 全长 272 千米 ． 一辆 轿车 以 每 小时 105 千米 的 速度 从 上海 出发 ， 经过 1.2 小时 到达 无锡 ． 无锡 至 南京 的 高速公路 长 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8100", "content": "卫民 小学 五年级 有 学生 84 名 ． 是 全校学生 总数 的 (4/25) ． 六年级 学生 人数 占 全校学生 总数 的 (4/15) ． 六年级 有 多少 学生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11464", "content": "妈妈 带 小 明 坐 长途汽车 去 看 奶奶 ， 早上 8 时 出发 ， 中午 12 时 到达 ， 汽车 每 小时 行 85 千米 ． 从小 明 家 到 奶奶家 有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4021", "content": "一 款 手机 从 网上 购买 比 商店 购买 便宜 320 元 ， 便宜 20% ． 这 款 手机 网上 卖 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15229", "content": "小 敏 和 王 刚 都 是 集邮 爱好者 ． 小 敏 和 王 钢 现在 两 人 邮票 枚 数 的 比 是 3 ： 4 ， 如果 王 刚 给 小 敏 9 枚 邮票 ， 那么 他们 的 邮票 张 数 就 相等 ． 两 人 共有 邮票 多少 枚 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9841", "content": "一 个数 除以 5 ， 商 是 123 ， 余数 是 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1147", "content": "学校 体操队 有 36 人 ， 合唱队 比 体操队 人数 的 2 倍 少 4 人 ， 合唱队 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16069", "content": "张 华 看 一本 故事书 ， 第一周 看 了 全书 的 (2/5) ， 第 二 周 看 了 全书 的 (11/35) ， 还 剩 120 页 ． 这本 故事书 一共 有 几页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3204", "content": "张老师 每月 的 总收入 是 3680 元 ， 如果 扣除 3000 元 后 ， 按 5% 的 税率 缴纳 个人所得税 ， 张老师 每 月份 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10396", "content": "百货大楼 一月份 的 全部 收入 都 按 5% 缴纳 营业税 ， 共 缴纳 税款 124 万元 ， 百货大楼 一月份 的 营业额 = 多少 万元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13059", "content": "一 台 步步高 学习机 h2 原价 1820 元 ， “ 元旦 ” 期间 0.8 优惠 ， “ 元旦 ” 期间 购买 一台 这样 的 步步高 学习机 可以 节省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "69", "content": "六年级 （ 1 ） 班 有 50 名 同学 ， 女生 人数 是 全班 人数 的 68% ， 女生 有 多少 名 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5223", "content": "某 学校 六年级 学生 有 300 人 ， 参加 拓展 课 学习 的 学生 有 210 人 ， 要 使 参加 拓展 课 学习 的 人数 达到 88% ， 还 需要 多少 学生 参加 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13011", "content": "计算 ： 1998 + 199.8 + 19.98 + 1.998 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14726", "content": "炼焦厂 运 来 78 吨 煤 ， 先 用 13 吨 煤 炼 出 9750 千克 焦碳 ， 照 这样 计算 ， 剩下 的 煤 可以 炼 出 多少 吨 焦碳 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12101", "content": "在 30 米 长 的 一段路 的 一侧 植树 ， 从头到尾 （ 两端 都 栽 ） 共 植 了 4 棵 树 ， 相邻 两棵树 之间 的 距离 = 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7554", "content": "长颈鹿 是 世界 上 最高 的 动物 ． 有 一头 长颈鹿 高 5 m ， 比 一头 大象 还要 高 (2/3) ， 这 头 大象 高 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4982", "content": "有 一堆 石子 ， 第一次 用 去 它 的 (2/7) ， 第 二 次 用 去 的 石子 比 第一次 多 24 吨 ， 两次 共用 去 石子 544 吨 ， 这 堆 石子 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12928", "content": "一 杯水 ， 第一次 喝 了 全 杯 的 (1/4) ， 第 二 次 喝 了 全 杯 的 (2/5) ， 剩下 的 占 这 杯水 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9506", "content": "一 本书 有 300 页 ， 第一天 读 了 全书 的 (1/10) ， 第 二 天 应从 第 多少 页 开始 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20225", "content": "一 堆 煤 ， 平均 每天 烧掉 2.5 吨 ， 7 天 后 还 剩 6.7 吨 ， 这 吨 煤 原有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13818", "content": "希望 小学 少先队 有 25 个 中队 ， 每个 中队 分成 4 个 小队 ． 全校 共有 少先队员 1300 人 ， 平均 每个 小队 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3197", "content": "六年级 参加 数学 小组 的 有 48 人 ， 参加 语文 小组 的 人数 是 数学 小组 的 (3/4) ， 参加 体育 小组 的 人数 是 语文 小组 的 (5/9) ． 参加 体育 小组 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17988", "content": "红红 皮鞋 店 以 每 双 39 元 购进 一批 儿童 皮鞋 ， 售出 价 为 48 元 ， 卖 到 还 剩 5 双 时 ， 除去 购进 的 这 批 儿童 皮鞋 的 所有 开支 ， 还 获利 93 元 ． 问 这 批 儿童 皮鞋 一共 购进 了 多少 双 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8582", "content": "一 本书 18 元 ， 莫 老师 要 买 39 本 ， 莫 老师 要 准备 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1461", "content": "夏季 里 一只 青蛙 6 天 大约 能 捕捉 900 只 害虫 ， 照 这样 计算 ， 一只 青蛙 一个月 大约 能 捕捉 多少 只 害虫 ？ （ 一个月 按 30 天 计算 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12958", "content": "甲 数 是 50 ， 乙 数 是 70 ， 乙 数 比 甲 数多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2477", "content": "除数 是 12 ， 商 是 7 ， 余数 是 11 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10086", "content": "第一 中学 301 宿舍 8 个人 5 个 月 共 用电 196 度 ， 平均 每人 每月 用电 多少度 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23095", "content": "甲 、 乙 两地 相距 380 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 140 千米 ． 剩下 的 路程 每 小时 行 60 千米 ， 还要 行 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4609", "content": "参观 上海 “ 世博会 ” ， 平日 普通 票 160 元 一张 ， 指定 日 普通 票 的 价格比 平日 普通 票 高 25% ， 指定 日 普通 票 多少 钱 一张 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1311", "content": "解放军 某部 开往 边境 ， 原 计划 需要 行军 18 天 ， 实际 平均 每天 比 原 计划 多行 12 千米 ， 结果 提前 3 天 到达 ， 这次 共 行军 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22604", "content": "一 个数 的 12.5% 比 57.5 的 (1/5) 少 3.5 ， 求 这个 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "477", "content": "甲班 和 乙班 共 96 人 ， 乙班 和 丙 班 89 人 ， 丙 班 和 丁 班 共 86 人 ， 问 甲班 和 丁 班 共 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15807", "content": "一 本书 ， 每天 读 10 页 ， 20 天 读完 ， 如果 提前 2 天 读完 ， 每天 应 读 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8064", "content": "5 （ 1 ） 班 有 45 名 学生 ， 其中 女生 有 28 名 ， 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11236", "content": "一 种 彩电 降价 (1/5) 后 是 960 元 ， 这种 彩电 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4623", "content": "一 堆 煤 12 千克 ， 用 了 一些 后 ， 还有 (1/4) 千克 ， 用 去 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10827", "content": "光华 小学 开展 了 支持 北京 2008 奥运会 捐款 活动 ， 其中 六年级 捐款 336 元 ， 比 五年级 多 (1/3) ， 五年级 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3994", "content": "香香 和 可可 背对背 站立 ， 香香 向北走 130 米 ， 可可 向南走 180 米 ， 两 人 相距 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15712", "content": "沙坡头 养鸡场 一 鸡 房 内 有 公鸡 125 只 ， 母鸡 只 数 是 公鸡 的 7 倍 ， 这个 鸡 房 内 共有 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15168", "content": "每块 蛋糕 5 元 ， 张 明 用 100 元 去 买 6 块 蛋糕 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14514", "content": "一 个数 的 5 倍 是 42.5 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9349", "content": "三年级 学生 去 农场 劳动 ， 女生 去 了 156 人 ， 男生 去 了 124 人 ， 4 人 分 一组 ， 一共 可以 分 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18298", "content": "甲 、 乙 两地 相距 456 千米 ， 一列 火车 从 甲地 开往 乙地 ， 平均 每 小时 行 76 千米 ， 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "953", "content": "有 4 棵 核桃树 每棵 产量 分别 是 78 千克 ， 69 千克 ， 55 千克 ， 64 千克 ， 平均 每棵 产 多少 千克 核桃 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22206", "content": "六年级 （ 1 ） 班 共有 40 名 学生 ， 其中 占 全班 (3/4) 的 学生 参加 了 各类 兴趣小组 ， 那么 参加 各类 兴趣小组 的 同学 共有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15542", "content": "学校 如 开 家长会 ， 请 了 144 位 家长 ， 9 人 围坐 一桌 ． 需要 准备 多少 张 桌子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7853", "content": "杨家 小学 上 学期 植树 495 棵 ， 这 学期 植树 827 棵 ． 两 学期 共 植 了 多少 棵 树 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19503", "content": "某 商站 运进 一批 红糖 ， 第一天 卖出 350 千克 ， 第 二 天 卖出 300 千克 ， 两天 正好 卖出 了 这 批 红糖 的 40% ， 这 批 红糖 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10243", "content": "朝阳 小学 上 月 水费 支出 960 元 ， 本月 水费 支出 比 上 月 节约 了 15% ， 本月 水费 支出 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7242", "content": "学校 运 来 一堆 沙子 ， 砌墙 用 去 (2/5) 吨 ， 修 运动场 用 去 (3/8) 吨 ， 还 剩 (1/10) 吨 ． 这 堆 沙子 原有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4992", "content": "商店 调进 65 台 电脑 ， 已经 出售 (1/5) ． 没 出售 电脑 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14111", "content": "修 一条 路 ， 当 修 到 这 条 路 的 (3/4) 时 ， 离 终点 还有 30 米 ， 这 条 路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1968", "content": "华光 小学 音乐 组 人数 是 美术组 的 (4/5) ， 美术组 人数 是 体育组 的 (1/3) ， 音乐 组 有 8 人 ， 体育组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17327", "content": "弟弟 比 哥哥 矮 (1/6) ， 弟弟 的 身高 是 哥哥 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14659", "content": "用 去 一桶 油 的 60% 后 ， 又 倒入 12 升 ， 这时 桶 里 的 油 和 原来 一样 多 ． 这 桶 油 原来 有 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9204", "content": "仓库 有 一批 货物 ， 第一天 运走 48.5 吨 ， 比 第 二 天 少 运走 18.5 吨 ， 两天 一共 运走 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5821", "content": "兰兰 家 距 图书馆 800 米 ， 她 出门 前往 图书馆 借书 ， 走 了 100 米 后 发现 忘 了 带 借书证 ， 连忙 回家 拿 借书证 再 去 图书馆 ． 兰兰 这 段时间 走 了 多 远 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8181", "content": "小 明 身高 1.52 米 ， 小 华 身高 1.65 米 ． 大 中 比 小 明 高 0.06 米 ， 大 中 比 小 华 矮 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14615", "content": "猴 妈妈 上山 摘 了 105 个 桃子 ， 他 准备 分给 7 个 猴 宝宝 来 吃 ， 每个 猴 宝宝 能 分 到 多少 个 桃子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17514", "content": "小 刚 的 课外书 本 数 比 小 明 多 45% ， 小 刚 有 课外书 116 本 ， 小 明 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1458", "content": "大 货车 和 客车 同时 从 甲 、 乙 两地 相对 开出 ， 大 货车 每 小时 行 35 千米 ， 客车 每 小时 行 40 千米 ， 4 小时 后 两车 相遇 ， 求 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15522", "content": "106 * 22 的 积 减去 432 / 24 的 商 ， 结果 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12266", "content": "植树 工人 今年 种 杨树 201 棵 ， 种 的 松树 是 杨树 的 3 倍 ， 一共 种 了 多少 棵 树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5031", "content": "一 自行车 选手 在 相距 950 千米 的 甲 、 乙 两地 间 训练 ． 他 从 甲地 出发 ， 去 时 每 90 千米 休息 一次 ， 到达 乙地 后 休息 一天 ， 再 沿 原 路 返回 ． 返回 时 ， 每 100 千米 休息 一次 ． 他 发现 恰好 有 一个 休息 地点 与 去 时 的 一个 休息 地点 相同 ． 问 这个 地方 距离 甲地 有 多 远 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3333", "content": "小 明 家 和 学校 相距 7.2 千米 ， 他 每分钟 骑 0.45 千米 ， 需要 多长时间 才能 到校 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12304", "content": "粮店 有 150 袋 大米 ， 第一天 卖出 (2/5) ， 第 二 天 卖出 第一天 的 (2/3) ． 还 剩下 多少 袋 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "21734", "content": "一 桶 汽油 倒 出 80% ， 刚好 倒 出 36 千克 ． 这 桶 汽油 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1113", "content": "小 明 读 一本 故事书 ， 第一天 读 了 (2/5) ， 第 二 天 读 了 (1/4) ， 还 剩 14 页 没有 读 ． 这本 故事书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17508", "content": "小 明 走 800 米 路 用 了 8 分钟 ， 他 平均 每分钟 走 了 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21591", "content": "元旦 期间 书店 打 0.7 销售 图书 ， 王老师 花 了 15 元 钱 ， 他 节省 了 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10303", "content": "在 一条 公路 的 两侧 种树 ， 每隔 10 米 种 一棵 ， 公路 一侧 一共 种 了 25 棵 树 （ 头尾 都 种 ） ． 这 条 公路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21368", "content": "某 工程队 修 一条 公路 ， 第一个 月 修 了 (3/4) 千米 ， 第 二 个 月 比 第一个 月 多 修 (3/5) 千米 ， 最后 还 剩下 (13/20) 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6896", "content": "比 800 少 265 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4304", "content": "一 堆 煤运 走 它 的 40% 后 ， 还 剩 36 吨 ， 如果 运走 它 的 (2/3) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1827", "content": "育 华 小学 六年级 有 学生 120 人 ， 其中 70 人 已 达到 国家 体育锻炼 标准 ， 要 使 六年级 “ 达标率 ” 达到 85% ， 还 应有 多少 人 达标 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1335", "content": "修 一条 长 1500 米 的 路 ， 已经 修 了 3 天 ， 平均 每天 修 240 米 ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8637", "content": "学校 买来 一批 图书 ， 18 个 班 每班 借 124 本 ， 还 剩下 30 本 ， 这 批 图书 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9029", "content": "小 芳 一家 准备 出去 旅游 ， 计划 每天 的 支出 如下 ： 住宿费 65 元 ， 交通费 25 元 ， 伙食费 60 元 ， 如果 外出 旅游 一周 （ 按 7 天 算 ） ， 至少 应 准备 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11167", "content": "一 本书 已 看 了 (2/3) 后 还 剩 80 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17500", "content": "商店 运回 苹果 240 千克 ， 运回 的 梨 是 苹果 的 (3/4) ， 又 是 橘子 的 (2/7) ， 运回 橘子 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5412", "content": "某 菜店 运 来 芹菜 225 千克 ， 是 运 来 的 萝卜 质量 的 1.5 倍 ； 运 来 白菜 的 质量 是 萝卜 的 2.6 倍 ． 运 来 白菜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18731", "content": "2 件 不同 的 上衣 和 3 条 不同 的 裤子 ， 一共 有 多少 种 不同 的 搭配 方案 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17236", "content": "某 建筑队 工地 运 来 40 吨 水泥 ， 5 天 用 了 这 批 水泥 的 25% ， 照 这样 计算 ， 这 批 水泥 一共 可用 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17345", "content": "红星 小学 操场 的 长 是 70 米 ， 宽比 长短 5 米 ． 亮 亮 绕 着 操场 跑 了 2 圈 ， 他 跑 了 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7998", "content": "一 个 车间 原来 每天 生产 108 个 零件 ， 比 现在 每天 少 生产 (1/7) ， 现在 每天 生产 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10305", "content": "26 个人 要 做 832 朵花 ， 如果 每人 每分钟 做 2 朵 ， 他们 需要 多长时间 才能 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21402", "content": "一 瓶 酱油 ， 用 去 一部分 后 还 剩 (1/2) 升 ， 还 剩 (1/5) ， 这 瓶 酱油 原来 有 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7142", "content": "一 只 蜗牛 向前 爬 25 厘米 ， 又 朝 后退 15 厘米 ， 在 朝 前 爬 10 厘米 ， 结果 前进 了 多少 厘米 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2001", "content": "某 小区 植树 250 棵 成活率 为 96% ， 这次 植树 有 多少 棵 没有 成活 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17317", "content": "学校 480 人 参加 大型 团体操 表演 ， 站 成 8 个 方阵 ， 每个 方阵 站 成 5 行 ， 每行 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11222", "content": "王师傅 需 对 一批 货物 进行 打包 ， 原 计划 每 小时 打包 30 件 ， 6 小时 可以 完成 ， 实际 每 小时 比 原 计划 多 打包 20% ， 实际 打包 这 批 货物 比 原 计划 提前 几小时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10029", "content": "华丰 微软公司 ， 制作 一批 软件 ， 计划 30 天 完成 ， 实际 每天 制作 120 件 ， 比 原 计划 提前 了 5 天 完成 任务 ． 原 计划 每天 制作 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19816", "content": "农场 在 一块 地里 培育 果树 苗 ， 下午 整修 了 这块 地 的 (7/15) 栽 桃树 ， (1/5) 栽 桃树 ， 其余 栽 苹果树 ， 苹果树 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1903", "content": "仓库 里 有 化肥 253 吨 ， 运出 一部分 后 ， 还 剩下 总数 的 (4/11) ， 这时 仓库 里 还有 化肥 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "108", "content": "一 个 长方体 盒子 的 长 是 (4/5) 米 ， 宽 是 (3/4) 米 ， 高 是 (1/6) 米 ． 这个 盒子 最 多 能 盛 多少 水 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6833", "content": "崂山 举行 登山 大赛 ， 组委会 在 长 达 845 米 的 山路 中 ， 每隔 65 米 设置 一个 服务站 （ 起点 和 终点 不 设 ） ． 共 设 多少 个 服务站 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18670", "content": "用 一张 长 18 cm ， 宽 5 cm 的 长方形 纸 围成 一个 圆柱 ， 侧 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18513", "content": "南大门 小学 有 女生 180 名 ， 比 男生 人数 少 (3/5) ， 男生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15811", "content": "张 叔叔 去年 年薪 15 万元 ， 应 缴纳 个人所得税 10% ． 张 叔叔 应 缴纳 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6824", "content": "社会 上 有 极个别 的 不法 商人 ， 制造 了 一些 假 、 冒 、 伪 、 劣 产品 ， 严重 侵犯 了 消费者 的 合法权益 ， 2004 年 5 月 18 日 报道 的 某区 假酒 中毒事件 就是 其中 之一 ． 这次 假酒 中毒事件 中 ， 毒死 11 人 ， 是 中毒 人数 的 (1/8) 还 多 4 人 ． 请 你 算 一 算 这次 中毒 人数 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20084", "content": "食堂 里 原来 有 24 袋 大米 ， 又 运来了 42 袋 ； 食堂 平均 每周 需要 3 袋 大米 ． 这些 大米 能够 吃 多少 周 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12908", "content": "学校 礼堂 门口 有 10 级 台阶 ， 每 级 台阶 长 4 米 ， 宽 0.6 米 高 0.2 米 ． 艺术节 学校 准备 给 礼堂 门口 的 台阶 铺上 红地毯 ， 至少 要 买 多少 平方米 的 红地毯 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "11877", "content": "我 县 在 全国 各地 从事 小吃 业 的 人员 已 达 4.48 万 人 ， 占 全县 农村 劳动力 的 56% ， 全县 农村 劳动力 有 多少 万 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7254", "content": "甲 数 是 40 ， 它 是 乙 数 的 80% ， 乙 数 比 甲 数多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16573", "content": "205 - 15 与 7 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17906", "content": "每 车 煤炭 大约 重 19 吨 ， 某 电厂 运 来 51 车 煤炭 ， 该厂 大约 运 来 煤炭 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9492", "content": "食堂 运 来 800 千克 煤 ， 烧 了 5 天 ， 还 剩 325 千克 ， 平均 每天 烧煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "428", "content": "一 个数 用 7 除 ， 商 是 25 ， 余数 是 4 ． 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19980", "content": "75 比 某 数 的 3 倍 多 12 ， 求 这个 数 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16681", "content": "李 叔叔 去年 收 了 134 千克 芒果 ， 今年 收 的 重量 是 去年 的 12 倍 ． 李 叔叔 今年 收 了 多少 千克 芒果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8045", "content": "2009 年 2 月 小 红 的 爸爸 把 20000 元 存入 银行 一年 ， 年利率 为 3.5% ． 到期 后 小 红 的 爸爸 可以 取出 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1609", "content": "小 明 打印 一篇 文章 ， 打 了 1600 个 字 后 ， 还 剩 全文 的 60% 没 打 ， 这 篇文章 有 多少 个 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18100", "content": "一 个 修路 队 前 5 天 一共 修路 644 米 ， 后 4 天 平均 每天 修路 145 米 ， 这个 修路 队 平均 每天 修路 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12694", "content": "一 根 绳子 的 (3/4) 是 24 米 ， 这根 绳子 的 (1/2) = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18830", "content": "甲乙 两车 同时 分别 从 ab 两地 相向 而 行 ， 相遇 时 甲 车 行驶 的 路程 占 全程 的 40% ， 乙 车 行驶 的 路程 比 全程 的 75% 少 12 千米 ， 问 ab 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17401", "content": "雄 城 商场 1 - 4 季度 分别 售出 冰箱 269 台 、 67 台 、 331 台 和 233 台 ． 雄 城 商场 全年 共 售出 冰箱 多少 台 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9662", "content": "通常 我们 把 海平面 的 高度 看做 0 m ， 喜马拉雅山 的 主峰 珠穆朗玛峰 的 高度 是 8844.43 m ， 太平洋 中 的 马里亚纳 海沟 是 世界 上 最深 的 海沟 ， 最深处 海拔 - 11034 m ． 如果 把 珠穆朗玛峰 填入 马里亚纳 海沟 的 最深处 ， 还 差 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10893", "content": "一 本 故事书 300 页 ， 每页 大约 有 0.55 千字 ． 它 的 前 180 页 是 中国 故事 ， 后面 部分 是 外国 故事 ， 外国 故事 大约 有 多少 千字 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7117", "content": "一 段 木头 ， 锯下 4.8 米 ， 还 剩 7.5 米 ． 这 段 木头 原来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11688", "content": "阳光 小学 一年级 有 男同学 92 人 ， 女同学 86 人 ， 三年级 的 人数 是 一年级 的 3 倍 ， 三年级 有 几 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19638", "content": "3 年 一班 的 48 名 同学 参加 植树 活动 ， 每位 同学 植树 5 棵 ， 他们 一共 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4852", "content": "学校 买来 300 张 软盘 ， 买来 的 光盘 比 软盘 少 20% ， 买来 光盘 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15769", "content": "学校 10 月份 上 半月 用电 3600 千瓦时 ， 下半月 比 上 半月 节约 (1/5) ， 下半月 用电 多少 千瓦时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14630", "content": "一 台 电风扇 的 价钱 是 305 元 ， 学校 购回 3 台 这样 的 电风扇 ， 一共 要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6977", "content": "体育 室 有 红色 跳绳 234 根 ， 蓝色 跳绳 比 红色 跳绳 少 76 根 ， 每 28 根 跳绳 放在 一个 盒子 里 ， 那么 这些 跳绳 一共 需要 多少 个 盒子 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14821", "content": "□ / 7 = 23 … 6 ． 这 道 算式 中 ， □ 里 应 填 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8213", "content": "甲 、 乙 两 数 的 最大公约数 是 3 ， 最小 公倍数 是 45 ， 若 甲 数 为 9 ， 则 乙 数 = 多少 ：", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3082", "content": "甲乙 两列 火车 分别 从 济南 和 青岛 同时 相对 开出 ， 4 小时 后 相遇 ． 已知 甲 车 每 小时 行 108 千米 ， 乙 车 每 小时 行 96 千米 ． 济南 和 青岛 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13941", "content": "某 服装厂 原来 做一套 童装 要 用布 2.1 m ， 现在 改进 了 裁剪 方法 ， 每套 比 原来 节约 0.1 m ． 原来 做 500 套 童装 的 布 ， 现在 可以 做 多少 套 童装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6755", "content": "工程队 修 一条 长 3000 米 的 公路 ， 已修 全长 的 (2/5) ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4759", "content": "学校 12 位 老师 到 台湾 旅游 ， 每人 交 4000 元 给 旅行社 ． 旅行社 为 每位 老师 支付 机票 1400 元 ， 住宿费 800 元 ， 门票 600 元 ， 若 按 5% 的 税率 缴纳 营业税 ， 该 旅行社 应 缴纳 多少 营业税 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18801", "content": "计算 ： 7 + 8 * 11 * 1.25 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15278", "content": "今年 旅游节 来 我市 的 游客 达到 4400 人 ， 比 去年 增加 了 (1/10) ， 去年 旅游节 来 的 游客 = 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14198", "content": "三年级 4 个 班 同学 ， 一起 外出 参加 “ 我 爱 科学 ” 活动 ， 每个 班 平均 分成 5 组 ， 每组 16 人 ， 三年级 一共 有 多少 人 参加 活动 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23125", "content": "一 台 彩色 电视机 打 0.7 后 卖 2100 元 ， 这 台 电视机 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8593", "content": "一 列 火车 的 票价 有 两种 3.5 元 一张 的 有 420 个 座位 ， 6 元 一张 的 有 380 个 座位 ， 如果 某次 客满 ， 这 列 客车 这次 的 收入 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11221", "content": "小 红 (1/6) 小时 行 了 (3/4) 千米 ， 她 每 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17451", "content": "李 明 看 一 本书 故事书 ， 第一天 看 了 (1/3) ， 第 二 天 看 了 全书 的 (2/5) ， 还 剩 24 页 没有 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4904", "content": "四年级 同学 参加 春游 活动 ， 有 102 个 男生 和 80 个 女生 参加 ， 如果 每 14 个 同学 需要 配 一个 老师 ， 那么 至少 应 配 多少 个 老师 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8528", "content": "光明 电影院 原来 有 座位 32 排 ， 平均 每排 坐 38 人 ， 扩建 后 增加 到 40 排 ， 比 原来 多 坐 704 人 ， 扩建 后 平均 每排 坐 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15200", "content": "文艺 书 是 科技 书 的 2 倍 ， 连环画 是 科技 书 的 3 倍 ． 已知 文艺 书 有 500 本 ， 科技 书 、 连环画 共有 多少 本 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13576", "content": "秋天 是 收获 的 季节 ， 动物 们 也 来 帮忙 了 ， 一只 猴子 摘 一篮 苹果 用 (1/12) 小时 ， 它 上午 摘 了 26 篮 ， 下午 摘 了 22 篮 ． 这 只 猴子 摘 苹果 共用 了 多少 小时 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16868", "content": "两座 楼房 之间 相距 40 米 ， 每隔 4 米 栽 一棵 雪松 ， 一直 行 共 能 栽 多少 棵 ？ （ 树 不能 直接 贴着 楼房 栽 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12531", "content": "用 144 只 箱子 装 鸡蛋 ， 每 只 箱子 装 504 个 ， 若 每 只 箱子 装 648 个 ． 这样 ， 可 空 出 几只 箱子 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13610", "content": "小 明 有 5 本 故事书 ， 他 比 小 华 少 3 本 故事书 ， 小 明 和 小 华 共有 多少 本 故事书 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21255", "content": "25 - 4.9 - 6.1 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1210", "content": "比 18 大 42 的 数 乘 6.25 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19541", "content": "一 座 温室 ， 室内 耕地面积 285 平方米 ， 全部 种植 西红柿 ， 每平方米 产 西红柿 0.6 千克 ， 每千克 按 0.65 元 计算 ， 一共 可以 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15148", "content": "某 伞 厂 为 支援 青海 玉树 抗震 赶制 一批 帐篷 ， 第一天 生产 了 总 帐篷 数 的 20% ， 第 二 天 生产 了 总 帐篷 数 的 (7/20) ， 还 剩 3600 顶 帐篷 没有 完成 ． 这 批 帐篷 一共 有 多少 顶 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17699", "content": "甲 数 是 30 ， 比 乙 数 少 (2/5) ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17", "content": "火箭 每秒 能 飞行 4500 米 ， 卫星 每秒 飞行 的 比 火箭 的 2 倍 少 1000 米 ． 卫星 每秒 飞行 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19330", "content": "停车场 有 小汽车 36 辆 ， 是 大客车 的 4 倍 ， 大客车 的 辆数 是 运货车 的 (3/5) ， 运货车 有 多少 辆 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19708", "content": "学校 美术组 有 70 人 ， 其中 男生 人数 是 女生 的 (3/4) ． 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10858", "content": "王 阿姨 摘 西红柿 96 千克 ， 摘 的 黄瓜 比 西红柿 的 2 倍 还 多 25 千克 ， 摘 的 黄瓜 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "719", "content": "一 桶 油 连 桶 重 20 千克 ， 倒 出 (1/3) 后 ， 连 桶 还 重 14 千克 ， 桶 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6335", "content": "李校长 一行 24 人 乘 高铁 去 长沙 听课 ， 每张 高铁 票 的 票价 是 160 元 ， 买票 共 需 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9129", "content": "修路 队 计划 用 30 天 时间 修 一段 公路 ． 实际 每天 修 360 米 ， 提前 5 天 完成 任务 ． 这 段 公路 全长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22160", "content": "菜市场 有 黄瓜 150 千克 ， 西红柿 的 千克 数 比 黄瓜 多 20% ， 西红柿 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5326", "content": "一 个 圆形 水池 周长 为 180 米 ， 若 沿着 水池 周围 种 上 柳树 ， 每隔 6 米 栽 一棵 ， 一共 栽 几棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4379", "content": "从 甲地 到 乙地 ， 快车 每 小时 行 84 千米 ， 3 小时 到达 ， 慢车 的 速度 只有 快车 的 (5/7) ， 慢车 几小时 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8354", "content": "一 辆 客车 从 昆明 开往 河口 ， 同时 一辆 货车 同时 从 河口 开往 昆明 ， 4 小时 后 两车 相遇 ， 相遇 后 又 经过 3 小时 ， 这时 客车 距 河口 还有 45 千米 ， 货车 距 昆明 还有 70 千米 ， 昆明 到 河口 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1821", "content": "王师傅 的 月工资 为 5000 元 ． 按照 国家 的 新税法 规定 ， 超过 3000 元 的 部分 应 缴 5% 个人所得税 ． 王师傅 每月 实际工资 收入 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7709", "content": "一 条 绳子 截去 (5/7) 后 剩 35 米 ， 这 条 绳子 原 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17690", "content": "强强 把 红 黄 共 20 个 外观 一样 的 球 放入 袋子 中 ， 他 摸 出 红球 的 可能性 是 (3/5) ， 他 放进 的 红球 比 黄 球 多 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18366", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (2/3) ， 第 二 天 看 的 是 第一天 的 (1/3) ， 还 剩 这 本书 的 几分 之 几 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12440", "content": "小 明 家 上个月 用水 14 吨 ， 这个 月 比 上个月 节约 了 (1/7) ． 节约 了 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20137", "content": "一 本 240 页 的 书 ， 小 红 第一天 看 了 20% ， 第 二 天 看 了 30% ， 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12921", "content": "一 件 衣服 原价 180 元 ， 现在 打 0.8 出售 ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5648", "content": "六年级 同学 为 灾区 捐款 ， 一班 52 人 ， 平均 每人 捐款 5 元 ， 二 班 有 48 人 ， 共 捐款 192 元 ， 两个 班 平均 每人 捐款 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1975", "content": "王 阿姨 把 4000 元 钱 存入 银行 ， 存期 5 年 ， 年利率 是 2.88% ， 到期 后 她 可以 取出 本金 和 税后 利息 多少 元 ？ （ 利息 按 20% 纳税 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9175", "content": "聚星 小学 选派 乒乓球 队员 参加 市级 小学生 乒乓球 比赛 ， 打算 从 5 名 队员 中 选出 2 名 队员 ， 一共 有 多少 种 不同 的 选 法 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16099", "content": "一 辆 卡车 和 一辆 货车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 5 小时 相遇 ． 客车 每 小时 行 80 千米 ， 货车 每 小时 行 90 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10931", "content": "1 米 的 (3/8) 与 多少 米 的 (1/8) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19589", "content": "一 本书 300 页 ， 小 红 上午 看 了 全书 的 (1/2) ， 下午 又 看 了 剩下 的 一半 ， 没有 看 的 部分 占 全书 的 几分 之 几 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4821", "content": "甲 数 是 58 ， 乙 数 比 甲 数多 6 倍 ， 甲乙 的 和 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8744", "content": "1 吨 的 (3/4) 和 多少 吨 的 (1/4) 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6939", "content": "一 种 糖果 的 配料 的 质量 比 是 白糖 ： 蜂蜜 ： 花生 = 1 ： 3 ： 6 ． 要 配制 这种 糖果 200 千克 ， 需要 准备 花生 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12737", "content": "小 明 今年 8 岁 ， 6 年 后 妈妈 的 年龄 是 小 明 的 3 倍 ， 妈妈 今年 多少岁 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20626", "content": "东东 买 一辆 玩具 汽车 ， 打 0.85 就 比 原价 便宜 6 元 ， 这辆 玩具 汽车 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13636", "content": "一 头 猪 有 130 千克 ， 8 头 这样 的 猪 共 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4494", "content": "一 群 蜜蜂 ， 其中 (1/5) 落 在 杜鹃花 上 ， (1/3) 落 在 玫瑰花 上 ， 剩下 的 21 只 蜜蜂 中 ， 除了 有 7 只 在 花丛 间 飞来飞去 ， 其余 的 都 落 在 了 月季花 上 ． 这 群 蜜蜂 一共 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12345", "content": "有 两列 火车 ， 一列 火车 长 180 米 ， 平均 每秒 行驶 15 米 ， 另 一列 火车 长 150 米 ， 平均 每秒 行驶 18 米 ． 两列 火车 从 相遇 到 相 离 一 共用 了 多长时间 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4899", "content": "李 叔叔 家 上个月 节约用水 (12/7) 吨 ， 每吨 水 按 (14/5) 元 计算 ， 上个月 节约 水费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9373", "content": "一 根 钢管 ， 用 去 它 的 (1/3) 还 剩 6 米 ； 若 用 去 它 的 (1/4) ， 还 剩 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10798", "content": "王老师 带 28 同学 去 汶川 参观 灾 后 重建 工程 ， 每人 车费 85 元 ， 一共 需要 多少 钱 买 车票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16968", "content": "果园 里 有 苹果树 240 棵 ， 苹果树 比 梨树 多 (2/3) ． 梨树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9930", "content": "果园 里 有 桃树 850 棵 ， 比 杏树 棵 树 的 3 倍 多 28 棵 ． 杏树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14101", "content": "小 明 用 10 元 买 了 4 支 钢笔 ， 找回 0.4 元 ， 每支 钢笔 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18990", "content": "商店 昨天 卖出 256 千克 苹果 ， 今天 卖出 苹果 的 数量 是 昨天 的 2 倍 ， 今天 卖出 多少 千克 苹果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12727", "content": "一 群 猴子 分 一堆 桃 ， 每个 猴子 分 6 个 桃 就 剩下 10 个 桃 ， 如果 每个 猴子 分 8 个 桃 就 还 差 4 个 桃 ． 这 群 猴子 有 多少 只 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7059", "content": "一 种 洗衣机 原来 每 台 成本 360 元 ， 现在 降低 到 270 元 ， 每 台 成本 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7764", "content": "1.8 / 2 - 1.6 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4065", "content": "一 个数 的 (2/9) 比 它 的 (5/6) 少 198 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16511", "content": "一 粮店 有 一批 大米 ， 卖出 了 (3/8) 吨 ， 还 剩 (4/8) 吨 ， 这个 粮店 一共 有 多少 吨 大米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9976", "content": "一 条 公路 已经 修好 147 千米 ， 还 剩下 30% 没有 修 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14759", "content": "5 米 的 钢筋 平均 锯 成 6 段 ， 每 段 全长 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22840", "content": "学校 买来 30 包 练习本 ， 每包 20 本 ， 每 本 0.3 元 ． 买 这些 练习本 要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11529", "content": "一 条 裤子 28 元 ， 一件 上衣 的 价钱 是 一条 裤子 的 3 倍 ． 买 这样 一套 衣服 ， 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13491", "content": "一 个 果园 的 总面积 是 (11/8) 公顷 ， 其中 梨 占 (1/22) ， 苹果 占 (4/11) ， 其余 的 地 种 了 其它 的 果木 ． 其它 果木 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10630", "content": "小 红 两天 读完 一本 故事书 ， 第一天 读 了 这 本书 的 40% ， 比 第 二 天 少 读 15 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18242", "content": "舒 婷 把 2000 元 存入 银行 ， 定期 2 年 ， 年利率 是 2.25% ， 到期 一共 领回 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22701", "content": "校办 厂 去年 计划 创产值 80 万元 ， 实际上 半年 创产值 45 万元 ， 下半年 创产值 50 万元 ， 去年 实际 产值 比 计划 超过 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1067", "content": "彩电 厂 计划 6 月份 生产 彩电 1050 台 ， 实际 前 6 天 生产 彩电 300 台 ． 照 这样 计算 ， 再生产 多少 天 就 可以 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20845", "content": "张师傅 3 小时 生产 21 个 零件 ， 照 这样 计算 要 生产 84 个 零件 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1417", "content": "一 件 商品 原价 200 元 ， 提价 10% 后 ， 又 降价 5% ， 现价 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "2602", "content": "某 小学 有 男生 420 人 ， 女生 比 男生 多 (1/7) ， 女生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5066", "content": "20 个 黄 球 、 15 个 白 球 、 5 个 红球 混装 在 盒 中 ， 任意 抓取 一个 ， 抓 到 白 球 的 可能性 大小 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8487", "content": "用 汽车 运 一堆 货物 ， 原 计划 每 小时 运 80 吨 ， 9 小时 运 完 ． 实际 每 小时 运 90 吨 ， 多少 小时 可以 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19722", "content": "一 根 长 10 米 的 绳子 ， 正好 绕 长 桌面 2 周 ， 这 张 长 桌面 的 周长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17982", "content": "商 是 0.2 ， 被除数 是 0.6 ， 除数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20214", "content": "小 明 看 一本 180 页 的 《 开心辞典 》 ， 前 3 天 平均 每天 看 20 页 ， 余下 的 每天 看 24 页 ， 看 完 这 本书 还要 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6086", "content": "1000 千克 青菜 ， 早晨 测 得 它 的 含水率 是 97% ， 下午 测 得 它 的 含水率 是 95% ， 那么 这些 菜 重量 减少 了 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7316", "content": "在 一次 植树 活动 中 ， 六年级 同学 植树 120 棵 ， 五年级 同学 植树 比 六年级 少 (1/6) ， 五年级 同学 植树 比 四年级 多 (1/4) ． 四年级 植树 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8255", "content": "从 仓库 里 运走 水泥 85.6 吨 ， 还 剩 52.3 吨 ． 仓库 里 原有 水泥 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11632", "content": "小 红 到 文具店 买 了 5 支 圆珠笔 和 3 支 铅笔 ， 共用 支 2.90 元 ． 已知 每支 铅笔 0.30 元 ， 每支 圆珠笔 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9603", "content": "一 种 vcd 影碟机 的 售价 是 900 元 ， 比 原来 降价 20% ． 原来 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18467", "content": "王 叔叔 带 了 600 元 钱 在 市场 买 了 15 只 小鸭 后 ， 还 剩下 75 元 ， 平均 每 只 小鸭 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "692", "content": "伯伯 家 今年 收入 11.55 万元 ， 是 去年 的 1.4 倍 ． 伯伯 家 去年 收入 多少 万元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12856", "content": "丽丽 看 一 本书 ， 第一天 看 了 25 页 ， 第 二 天 看 了 32 页 ， 还 剩下 全书 的 40% ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23064", "content": "兔子 每 小时 跑 41 千米 ， 5 小时 大约 跑 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1437", "content": "两车 从 a 、 b 两地 同时 开车 相向 而 行 ， 4 小时 后 相遇 ， 已知 甲 每 小时 行 50 千米 ， 乙 每 时 行 60 千米 ． 求 甲 行 完全 程 还 需要 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13973", "content": "甲乙 两车 从 相距 280 千米 的 两地 同时 相对 开出 ， (7/4) 小时 相遇 ． 乙 车 每 小时 行 70 千米 ， 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3354", "content": "车间 生产 了 240 个 乒乓球 ， 一共 装 了 8 箱 ， 每箱 5 盒 ． 每盒 装 几个 乒乓球 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3316", "content": "一 堆 煤 用 去 (1/8) 是 (9/4) 吨 ， 这 堆 煤 的 (2/3) = 多少 吨 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8414", "content": "某 品牌 篮球 降价 (1/5) 后 ， 售价 为 120 元 ． 该 品牌 篮球 的 原价 = 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3735", "content": "跳远 比赛 中 ， 小 英 跳 了 3.46 米 ， 强强 比 小 英 多 跳 了 0.87 米 ， 亮 亮 比 强强 少 跳 了 0.13 米 ． 亮 亮 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4245", "content": "一 个 棱 长 是 5 分 米 的 正方体 鱼缸 ， 里面 装满水 ， 把 水 倒入 一个 底 面积 50 平方分米 的 长方体 鱼缸 里 ， 长方体 鱼缸 里 的 水 有多深 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19263", "content": "电视机厂 生产 彩电 14000 台 ， 放进 仓库 8500 台 ， 剩下 的 由 50 辆车 运走 ， 平均 每辆车 运 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22265", "content": "果园 里 有 果树 1200 棵 ， 其中 梨树 占 40% ， 桃树 占 20% ， 两种 果树 共有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11161", "content": "五年级 有 女生 30 人 ， 男生 比 女生 少 10% ． 五年级 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12744", "content": "4 一班 有 男生 20 人 ， 相当于 女生 的 (2/3) ． 女生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9619", "content": "光明 小学 新 买来 45 套 单人 课桌椅 ， 每张 课桌 128 元 ， 每 把 椅子 52 元 ． 买 桌子 比 买 椅子 总共 多用 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "584", "content": "修 一条 公路 ， 第一天 修 了 全长 的 (3/8) ， 第 二 天 修 了 全长 的 在 (2/8) ， 两天 共 修 250 千米 ， 这 条 路 有 多长 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18523", "content": "一 列 火车 以 每分钟 800 米 的 速度 通过 一座 3200 米 的 大桥 ， 如果 火车 全长 200 米 ， 从 火车 上 桥 到 最后 一 节车厢 离开 大桥 需要 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3183", "content": "一 个 饲养场 ， 养鸭 1200 只 ， 养 的 鸡 比 养 的 鸭 多 (3/4) ， 养 的 鸡 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20168", "content": "拖鞋 售价 是 10 元 ， 一双 凉鞋 的 售价 比 一双 拖鞋 高 90% ， 正好 是 一双 皮鞋 售价 的 20% ． 一双 皮鞋 的 售价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18646", "content": "一 段 铁路 进行 安全 检修 ， 第一周 检修 了 15 千米 ， 还 剩下 全长 的 25% 没 检修 ． 这 条 铁路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2858", "content": "买 5 支 钢笔 需要 28 元 ， 照 这样 计算 ， 再 买 8 支 钢笔 ， 还 需要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3654", "content": "4 - (1/4) 的 差 乘 (3/5) ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10787", "content": "服装厂 要 加工 一批 服装 ， 加工 了 (4/9) 后 ， 还 差 250 套 没 加工 ， 服装厂 计划 要 加工 多少 套 服装 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7471", "content": "工厂 今年 共 生产 机器 240 台 ， 比 去年 多 生产 40 台 ， 今年 产量比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20625", "content": "学校食堂 运 来 大米 和 面粉 各 15 袋 ， 大米 每 袋 50 千克 ， 面粉 每 袋 25 千克 ， 学校食堂 运 来 大米 和 面粉 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "366", "content": "商店 购进 一批 鞋子 ， 第一天 卖出 总数 的 (1/4) ， 第 二 天 卖出 总数 的 (1/5) ， 此时 剩下 的 比 卖出 的 还 多 24 双 ， 购进 的 这 批 鞋子 共 多少 双 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17772", "content": "小 亮 买 了 一本 《 童话故事 》 ， 花 了 4.6 元 ； 又 买 了 一本 《 宇宙 探险 》 ， 花 了 10.5 元 ． 小 亮 买 这 两本书 一共 花 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1757", "content": "在 “ 绿色 家园 ” 的 植树 活动 中 ， 大 丰镇 计划 植树 2.5 万棵 ， 实际 植树 3 万棵 ． 实际 比 计划 多 植树 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17753", "content": "学校 买来 350 套 桌椅 ， 每套 99 元 ， 共用 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21898", "content": "一 套 茶具 ， 打 0.8 出售 后 是 48 元 ． 这 套 茶具 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11014", "content": "一 根 电线 长 22.4 米 ， 第一次 用 去 (1/4) ， 第 二 次 用 去 (1/2) 米 ， 两次 一 共用 去 电线 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11028", "content": "一 本 数 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 了 20 页 ， 还 剩 全书 的 (3/5) 没有 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "589", "content": "某 车间 要 生产 2700 个 零件 ， 计划 用 50 天 完成 ． 实际 每天 比 计划 多 加工 6 个 ． 加工 这 批 零件 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12584", "content": "某地 有 垃圾 90 吨 ， 现 要 雇用 每 车 能 装 1.5 吨 的 清运 车 若干辆 ， 一辆车 一天 最 多 能 拉 6 次 ， 若 这些 垃圾 必须 在 一天 之内 运走 ， 则 至少 雇 多少 辆 垃圾清运 车 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5980", "content": "水果店 运 来 苹果 和 桔子 各 50 箱 ， 每箱 苹果 22 千克 ， 每箱 桔子 28 千克 ． 苹果 比 桔子 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18014", "content": "教师 旅游团 有 58 人 去 森林公园 ， 每张 门票 35 元 ， 应付 门票 款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21336", "content": "修 一条 公路 ， 第一天 修 了 全长 的 25% ， 第 二 天 修 了 全长 的 30% ， 还 剩下 360 米 没有 修 ， 这 条 路 全长 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15654", "content": "某 化工厂 2 月份 生产 肥皂 8400 箱 ， 完成 了 全年 计划 的 (1/10) ， 全年 计划 生产 肥皂 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "268", "content": "(1/3) + 0.25 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20408", "content": "甲乙 两艘 船 分别 从 两个 码头 同时 相向 而 行 ． 甲 船 每 小时 行驶 40 千米 ， 乙 船 每 小时 行驶 28 千米 ， 两 船 行驶 4 小时 后 相遇 ． 甲 、 乙 两个 码头 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5729", "content": "学校 准备 发 练习本 ， 发给 18 个 班 ， 每班 156 本 ， 还 需要 准备 120 本 作为 备用 ． 学校 应 买 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10215", "content": "某 拦河坝 的 体积 是 8640 立方米 ， 横截面 面积 是 43.2 平方米 ， 这 段 拦河坝 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2733", "content": "草地 上 有 180 只 羊 在 吃 草 ， 其中 25% 是 山羊 ， 其余 的 都 是 绵羊 ， 绵羊 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21681", "content": "某 商店 运 来 青菜 500 千克 ， 大白菜 的 质量 是 青菜 的 (3/5) ， 同时 又 是 西红柿 的 (5/6) ， 运 来 西红柿 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13932", "content": "商店 卖 一种 桶装 的 菜油 ， 上午 卖出 16 桶 ， 下午 和 晚上 又 卖出 38 桶 ， 共 收款 1971 元 ． 这种 菜油 每桶 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18293", "content": "汽车 从 学校 出发 到 太湖 玩 ， (6/7) 小时 行驶 了 全程 的 (3/4) ， 这时 距 太 湖边 还有 4 千米 ． 照 这样 的 速度 ， 行 完全 程 共用 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16470", "content": "一 个 因数 是 125 ， 另 一个 因数 是 8 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20686", "content": "朴朴 有 一些 故事书 和 连环画 ， 其中 故事书 的 本 数 占 全部 的 (5/8) ， 剩下 的 连环画 有 36 本 ． 朴朴 有 故事书 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16245", "content": "一 个数 除以 7 ， 商 是 13 ， 余数 是 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4267", "content": "6 台 同样 织布机 ， 2.6 小时 织布 124.8 米 ， 平均 每 台 织布机 每 小时 织布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6786", "content": "海象 的 寿命 大约 是 40 年 ， 海狮 的 寿命 是 海象 的 (3/4) ， 海狮 的 寿命 是 海豹 的 (3/2) ． 海豹 的 寿命 = 多少 年 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16851", "content": "用 23 条 短绳 接 成 一条 长绳 ， 需要 打 多少 个 结 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19417", "content": "一 条 裤子 28 元 ， 一件 上衣 的 价钱 是 一条 裤子 的 2 倍 ． 买 这样 一套 衣服 ， 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13970", "content": "一 辆 卡车 车厢 长 3.5 米 ， 宽 2.5 米 ． 在 车厢 里 装 了 0.4 米 高 的 沙子 ． 1 立方米 沙子 重 1.2 吨 ， 这辆 卡车 装 了 多少 吨 沙子 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "18096", "content": "小 陈 中介 公司 为 顾客 出售 房屋 收取 2% 的 中介费 ． 中介 公司 为 刘先生 出售 房屋 一套 ， 收取 中介费 1000 元 ， 刘先生 卖房 还要 缴纳 1.5% 的 契税 ， 刘先生 缴纳 契税 要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17742", "content": "一 个数 和 25 相乘 的 积 是 15000 ， 如果 这个 数 缩小 100 倍 ， 积 变成 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6", "content": "10.6 - 0.4 与 5.5 的 积 ， 所得 的 差 除以 2.1 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16807", "content": "甲 数 是 30 ， 是 乙 数 的 (5/6) ， 乙 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6178", "content": "某 工厂 3 月份 生产 1600 个 机器 零件 ， 4 月份 生产 了 1800 个 零件 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13200", "content": "某班 有 男生 25 人 ， 男生 比 女生 少 5 人 ． 女生 人数 占 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1543", "content": "某 工厂 男女 员工 的 人数 比 是 7 ： 5 ， 女 员工 比 男员工 少 12 人 ， 男员工 有 多少 人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "50", "content": "几年 前 小 王 和 小 刘 一样 高 ． 这 几年 小 王 长 了 38 厘米 ， 小 刘 长 了 22 厘米 ， 现在 小 王 比 小 刘 高 (1/9) ． 现在 小 刘 有 多 高 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15063", "content": "把 14 厘米 的 绳子 平均 截 成 5 段 ， 每 一段 是 这根 绳子 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15513", "content": "希望 小学 的 同学 们 做 了 千纸鹤 ， 送给 幼儿园 的 小朋友 ． 幼儿园 有 9 个 班 ， 如果 每班 分 85 只 ， 就 会 缺 34 只 ， 同学 们 做 了 多少 只 千纸鹤 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5937", "content": "一 台 电脑 原价 4800 元 ， 现在 降价 (1/4) 出售 ， 现价 比 原价 降低 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1233", "content": "小 明 从 学校 到 图书馆 ， 走 了 全程 的 (1/3) 时 ， 离 图书馆 还有 900 米 ． 学校 和 图书馆 相距 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5053", "content": "小 明 有 15 张 邮票 ， 是 小 芳 邮票 张 数 的 (3/4) ， 小 丽 的 邮票 数 是 小 芳 的 (3/5) ， 则 小 丽 有 多少 张 邮票 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22070", "content": "某 电影院 共有 406 个 座位 ， 如果 每张 电影票 售 25 元 ， 整个 电影院 全部 坐满 ， 一共 可以 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7995", "content": "小林 的 老师 买 回 143 本 练习簿 ， 平均 分给 小林 和 他 的 12 个 同学 ． 平均 每人 分 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6918", "content": "学校 田径队 有 男 运动员 60 人 ， 比 女 运动员 的 (3/2) 多 6 人 ， 女 运动员 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14441", "content": "两个 加数 都 是 50 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11585", "content": "邮政 汇款 的 汇费 是 1% ， 王明 准备 给 家里 寄 850 元 钱 ， 要 交 多少 元 的 汇费 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6065", "content": "一 个 平行四边形 的 面积 是 64 平方厘米 ， 底 是 16 厘米 ， 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "351", "content": "百家 村 要 挖 一条 540 米 的 水渠 ， 第一天 挖 了 20% ， 第 二 天 挖 了 (1/8) ， 两天 共 挖 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9012", "content": "求 5 个 (2/11) 的 和 = ， 算式 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12649", "content": "一 节 烟囱 的 侧 面积 为 9.42 平方米 ， 长 为 2 米 ， 它 的 底面 半径 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7599", "content": "森林公园 里 有 柳树 120 棵 ， 是 杨树 棵 树 的 2 倍 ， 而 松树 棵 树 是 杨树 的 3 倍 ， 森林公园 里 有 松树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10594", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 40 千米 ， 4 小时 可以 到达 ， 如果 每 小时 行 32 千米 ， 几小时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23062", "content": "张 庄 去年 原 计划 造林 128 公顷 ， 实际 完成 计划 的 125% ， 实际 比 计划 多 造林 多少 公顷 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22493", "content": "用来 消毒 的 碘酒 是 把 碘 和 酒精 按 1 ： 50 的 比 混合 配置 而 成 的 ， 现在 有 20 克 碘 ， 可以 配置 这种 碘酒 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16814", "content": "垃圾 分类 ， 六年级 同学 收集 了 180 个 易拉罐 ， 其中 (1/3) 是 一班 收集 的 ， (2/5) 是 二 班 收集 的 ． 两班 共 收集 了 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "23159", "content": "某 商店 买 了 15 盒 乒乓球 ， 每 8 个 装 一盒 ， 一 共用 去 了 240 元 ． 平均 每个 乒乓球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20772", "content": "小 东 在 计算 一道 乘法 算式 时 ， 把 一个 因数 63 错 写成 了 36 ， 结果 得 积 是 1008 ， 这 道 题 正确 的 积 应该 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10859", "content": "李 丽 家 离 学校 有 455 米 远 ， 每天 上学 要 走 7 分钟 ． 照 这样 的 速度 ， 她 去 少年宫 要 走 1040 米 ， 需要 走 多长时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19181", "content": "甲 数 的 (2/3) 等于 乙 数 的 40% ， 甲 数 是 乙 数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2298", "content": "红色 粉笔 比 白色 粉笔 少 20% ， 白色 粉笔 比 红色 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18746", "content": "一 捆 电线 长 200 米 ， 第一次 用 去 30 米 ， 第 二 次 用 去 的 米 数 是 第一次 的 3 倍 ， 这 捆 电线 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8898", "content": "红星路 的 路 宽 由 原来 的 12 米 拓宽 到 现在 的 15 米 ， 拓宽 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4711", "content": "一 种 商品 ， 售价 450 元 ， 比 原来 降低 了 50 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10676", "content": "一 座 桥 实际 造价 2100 万元 ， 比 原 计划 多用 了 5% ， 原 计划 造价 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15645", "content": "有 两列 火车 ， 一列 火车 长 238 米 ， 每秒钟 行 16 米 ， 另 一列 火车 长 357 米 ， 每秒钟 行 19 米 ． 两车 相向 而 行 ， 从 车头 相遇 到 车尾 离开 需要 多少 秒钟 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5108", "content": "一 个 梯形 的 面积 是 30 cm ^ 2 ， 它 的 上下 底 的 和 是 12 cm ， 它 的 高 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7558", "content": "把 多少 扩大 100 倍 后 ， 再 缩小 10 倍 是 24 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21763", "content": "张 村 修 一条 水渠 ， 已经 修好 了 5.82 千米 ， 剩下 的 比 修好 的 多 0.42 千米 ． 这 条 水渠 长 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17066", "content": "一 个 梯形 的 上 底 是 3.8 cm ， 下 底 是 6.2 cm ， 面积 是 32 cm ^ 2 ， 高 = 多少 厘米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8109", "content": "柳湾 小学 全校学生 人数 的 (2/9) 是 300 人 ， 全校学生 人数 的 (8/9) = 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1168", "content": "熊猫 电视机厂 现在 每月 生产 电视机 1200 台 ， 比 过去 每月 生产 的 2 倍 少 120 台 ， 过去 每月 生产 电视机 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6970", "content": "0.94 / 0.7 ， 商 取 1.3 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7757", "content": "小 明 把 500 元 钱 存入 银行 ， 整存整取 2 年 ， 年利率 是 2.5% ． 到期 时 可 得 利息 和 本金 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13505", "content": "两地 相距 480 千米 ． 两辆 汽车 同时 从 两地 相对 开出 ， 甲 车 的 速度 是 乙 车 的 1.5 倍 ， 4 小时 后 还 相距 80 米 ． 乙 车 速度 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2282", "content": "某人 从 甲地 到 乙地 ， 第一天 走 了 全程 的 (3/17) ， 第 二 天 走 了 全程 的 (8/51) ， 第 3 天 走 了 全程 的 (1/6) ， 还 剩 全程 的 几分 之 几 没 走 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18433", "content": "小 亮 的 家 离 学校 很 近 ， 只有 60 米 ， 有 一天 他 上学 走 了 18 米 时 ， 看到 天 快 下雨 了 ， 于是 回家 拿 雨伞 继续 去 上学 ． 算 一 算 ， 小 亮 这次 上学 一共 走 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9516", "content": "一 个 圆形 跑道 长 300 米 ， 沿 道路 每隔 6 米 栽 一棵树 ， 跑道 周围 共 栽 了 多少 棵 树 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12015", "content": "一 根 木料 锯 成 5 段 要 用 32 分钟 ， 照 这样 计算 ， 如果 要 将 这根 木料 锯 成 8 段 ， 要 用 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6767", "content": "拖拉机厂 要 制造 27560 台 拖拉机 ， 计划 每天 生产 260 台 ， 实际 完成 任务 只用 了 104 天 ， 比 计划 提前 几天 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7276", "content": "师傅 每 小时 做 48 个 零件 ， 徒弟 每 小时 做 36 个 零件 ， 师傅 9 小时 做 的 零件 ， 徒弟 要 做 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5229", "content": "果园 里 梨树 与 桃树 的 比 是 3 ： 5 ， 已知 桃树 有 40 棵 ． 这个 果园 共有 果树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18147", "content": "甲 仓库 有 货物 42 吨 ， 比 乙 仓库 多 (1/6) ， 比 乙 仓库 多 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22856", "content": "小 莫 古 小学 有 男生 300 人 ， 女生 236 人 ． 已经 检查 身体 的 有 398 人 ， 没 检查 身体 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14766", "content": "某 发电厂 上 月 烧煤 2000 吨 ， 本月 烧煤 2250 吨 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16602", "content": "大兴 商场 运 来 7 件 新型 节能 电筒 ． 每件 12 只 ， 总价值 504 元 ． 每 只 电筒 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16826", "content": "一 辆 汽车 上山 每 小时 行 36 千米 ， 行 了 5 小时 到达 山顶 ， 下山 时 按 原 路 返回 ， 提前 了 1 小时 ． 汽车 下山 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4855", "content": "香山 去年 种树 360 棵 ， 今年 春季 种树 的 棵 数 是 去年 的 120% ， 今年 种树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "784", "content": "某 电视机厂 上 半月 已 生产 了 150000 台 电视机 ， 还有 全年 计划 的 40% 没 完成 ， 全年 计划 生产 多少 台 电视机 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5708", "content": "菜农 李 伯 把 收获 的 8400 千克 大白菜 准备 供应 给 4 个 菜场 ， 在 装运 的 过程 损耗 了 10% ， 平均 每个 菜场 能 得到 大白菜 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20373", "content": "商店 运 来 蓝 毛衣 15 包 ， 正好 是 运 来 的 红 毛衣 包 数 的 (3/5) ． 商店 运 来 红 毛衣 多少 包 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16600", "content": "筑路 队 计划 修 一条 3600 米 长 的 公路 ， 第一 月 修 了 全长 的 15% ， 第 二 月 修 了 全长 的 18% ， 还 剩 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17761", "content": "甲 、 乙 两车 分别 从 ab 两地 同时 相对 开出 ， 经过 5 小时 相遇 ， 分别 到达 目的地 后 ， 各 休息 1 小时 ， 再 以 原 速 返回 ． 当 再次 相遇 时 离 最初 出发 时 经过 了 多长时间 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1078", "content": "一 张 桌子 120 元 ， 一把 椅子 30 元 ， 公司 买 了 32 套 桌椅 ， 一共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16765", "content": "一 根 电线 长 4 米 ， 用 去 了 (3/8) 米 ， 还 剩 多少 米 ？ 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5644", "content": "2.73 与 0.27 的 和 乘 2.18 的 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20664", "content": "某 餐厅 7 月份 应 缴 税款 4500 元 ， 营业税 率 是 6% ， 营业 收入 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21112", "content": "计算 ： 1.25 * 0.32 * 2.5 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4130", "content": "妈妈 带 了 50 元 钱 ， 买 水果 花 了 18.35 元 ， 买 肉 花 了 20.55 元 ， 又 买 蔬菜 花 了 5.1 元 ， 妈妈 还 剩 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14805", "content": "锅炉房 运 来 一批 煤 ， 如果 每天 烧 1.2 吨 ， 可以 烧 20 天 ． 现在 每天 少 烧 0.2 吨 ， 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21219", "content": "9.6 的 1.5 倍 比 一个 数 的 60% 多 1.4 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "341", "content": "商店 购进 200 箱 梨 ， 每箱 18 千克 ， 每千克 卖 6 元 ， 这些 梨 一共 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "945", "content": "一 条 裤子 的 价钱 是 78 元 ， 是 一件 上衣 的 (2/3) ， 一件 上衣 的 价钱 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4172", "content": "已知 两个 因数 的 积 是 201.6 ， 一个 因数 是 72 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20149", "content": "5 千克 的 (1/9) 与 1 千克 的 多少 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12804", "content": "二年级 有 男生 56 人 ， 女生 35 人 ． 六年级 的 学生 人数 是 二年级 学生 人数 的 4 倍 ， 六年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5595", "content": "一 个数 的 5 倍 是 150 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6467", "content": "修 一条 水渠 ， 第一次 修 了 全长 的 (3/8) ， 第 二 次 修 15 米 ， 这时 已修 的 与 剩下 的 比 为 7 ： 5 ． 第一次 修 了 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4732", "content": "一 个 圆锥形 的 沙堆 ， 体积 是 28.26 立方米 ， 把 这 堆 沙 均匀 地 填 在 一个 长 5 米 ， 宽 2 米 的 长方形 沙坑 中 ， 沙 厚 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20620", "content": "某 工厂 原有 职工 500 人 ， 年初 有 40% 的 职工 下岗 ， 后来 在 下岗职工 中 有 (3/5) 的 人 重新 上岗 ． 下岗 后 重新 上岗 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15828", "content": "实验 学校食堂 运 来 一批 柴油 ， 计划 每天 烧 柴油 450 千克 ， 可 烧 25 天 ， 改进 炉灶 后 ， 可 烧 30 天 ， 现在 每天 烧 柴油 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14907", "content": "一 条 水渠 500 米 ， 第一天 修 了 全长 的 (3/20) ， 第 二 天 修 了 全长 的 (1/10) ， 两天 共 修 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16059", "content": "爸爸 买回来 一个 蛋糕 ， 小 华 吃 了 这个 蛋糕 的 (2/8) ， 妈妈 吃 了 这个 蛋糕 的 (1/8) ， 小 华 和 妈妈 共 吃 了 这个 蛋糕 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12655", "content": "美术 小组 有 54 人 ， 比 体育 小组 的 人数 少 (1/3) ． 两个 小组 一共 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15238", "content": "机械厂 制造 一批 零件 ， 原 计划 每天 生产 250 个 ， 12 天 完成 ． 实际 每天 生产 的 个数 是 原来 的 1.5 倍 ， 完成 这 批 零件 实际 用 了 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20623", "content": "服装厂 要 加工 480 套 服装 ， 甲组 每天 能 加工 43 套 ， 乙组 每天 能 加工 37 套 ， 两个 小组 合作 ， 几天 能 全部 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19736", "content": "学校 买 回 文艺 书 和 科技 书 各 45 本 ， 每 本 文艺 书 7 元 ， 每 本 科技 书 5 元 ． 买 文艺 书 比 科技 书 多 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17008", "content": "学校 开展 节约用水 活动 ， 这 星期 前 3 天 共 节约用水 14.7 吨 ， 后 4 天 每天 节约用水 4.2 吨 ， 这 星期 平均 每天 节约用水 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16735", "content": "奶奶 家养 了 2 只 公鸡 、 10 只 母鸡 ， 共生 蛋 240 个 ． 问 平均 每 只 鸡 生 了 多少 个 蛋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10285", "content": "食品店 上 月 的 营业额 是 20000 元 ， 如果 按 营业额 的 5% 缴纳 营业税 ， 上 月 应 缴纳 营业税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18026", "content": "计算 ： 2012 * 4.5 + 201.2 * 35 + 20.12 * 150 + 2.012 * 500 = ．", "knowledge": ["*", "+"], "difficulty": 0.6, "length": 15}
-{"question_id": "5452", "content": "一 个 长方形 的 宽 是 8 厘米 ， 长 是 宽 的 2 倍 ． 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10761", "content": "20 比 一个 数 的 (2/3) 多 2 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3339", "content": "一 本书 有 320 页 ， 小 明 第一天 读 全书 的 (1/8) ， 第 二 天 读 全书 的 20% ， 还 剩 多少 页 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16447", "content": "2828 * 33 - 7777 * 2 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12447", "content": "有 大小 两桶 油 共 26 千克 ， 大桶 的 油 用 去 2 千克 后 ， 剩下 的 油 与 小桶 内 油 的 重量 比 是 3 ： 1 ． 大桶 原来 装有 多少 千克 油 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13445", "content": "大 世界 运 来 120 箱 矿泉水 ， 运 来 冰红茶 的 箱 数 比 矿泉水 多 (1/3) ， 运 来 冰红茶 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17783", "content": "用 0.8 去除 7.2 的 商 乘 7.6 与 (3/5) 的 差 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18664", "content": "一 件 衣服 打 0.8 ， 小 明 用 150 元 买 到 ， 这件 衣服 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4836", "content": "王老师 在 手机店 花 1600 元 买 了 一部 品牌机 ， 比 原价 便宜 了 20% ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6188", "content": "小 丽 将 1000 元 存入 银行 ， 定期 2 年 ， 年利率 是 2.79% ， 到期 后 利息 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12838", "content": "小 红 采集 标本 24 件 ， 送给 小 芳 4 件 后 ， 小 红 恰好 是 小 芳 的 (4/5) ， 小 芳 原有 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13510", "content": "光明 小学 有 男生 384 人 ， 女生 比 男生 少 96 人 ， 光明 小学 共有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13554", "content": "有 含盐量 为 10% 的 盐水 600 克 ， 蒸发掉 多少 克 水 ， 就 可以 得到 含盐量 为 15% 的 盐水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19381", "content": "机床厂 原 计划 40 天 生产 1200 台 机床 ， 实际 30 天 就 完成 了 ． 实际 每天 多 生产 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2911", "content": "一 个数 加上 2 ， 减去 3 ， 乘以 4 ， 除以 5 等于 12 ， 这个 数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19711", "content": "甲 、 乙 两队 合 修 一条 水渠 ， 甲队 每天 修 14.5 米 ， 乙 队 3 天 修 46.5 米 ， 照 这样 计算 ， 两队 合 修 6 天 ， 共 修 水渠 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11762", "content": "从 a 城 到 b 城 有 320 千米 ， 一辆 汽车 3 小时 行驶 240 千米 ， 照 这样 计算 ， 再 用 多少 小时 能 到达 b 城 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9188", "content": "王经理 一个月 的 工资 是 1860 元 ， 按规定 ， 减去 800 元 后 的 部分 要 按 20% 的 税率 缴纳 个人所得税 ． 他 每月 应 缴 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17174", "content": "淘气 的 爸爸 为 淘气 投保 “ 平安保险 ” ， 保险金额 5000 元 ， 保险期限 3 年 ． 按 年 保险费率 0.4% 计算 ， 淘气 的 爸爸 应付 保险费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14173", "content": "一 车 化肥 ， 第一次 运走 了 (2/7) ， 第 二 次 运走 了 (3/7) ． 两次 一共 运走 了 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22328", "content": "果园 的 水果 丰收 了 ， 苹果 的 产量 占 水果 总产量 的 (1/5) ， 梨 的 产量 占 水果 总产量 的 25% ， 梨 比 苹果 多 收 了 5 吨 ， 果园 共 收 水果 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6934", "content": "一 台 拖拉机 耕地 ， 前 2 小时 耕地 (3/2) 公顷 ， 照 这样 计算 ， 再 耕 8 小时 就 可以 将 这块 地 耕 完 ， 这块 地 一共 多少 公顷 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6629", "content": "林场 有 2800 棵 杨树 ， 柳树 比 杨树 多 1500 棵 ， 松树 比 柳树 少 120 棵 ． 松树 有 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13678", "content": "课外活动 小组 做 剪纸 ， 8 个人 1.5 小时 共 剪 264 个 ， 平均 每人 每 小时 剪纸 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22022", "content": "甲 、 乙 两个 数 的 比 是 3 ： 5 ， 已知 甲 比 乙 少 30 ， 那么 甲 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3541", "content": "在 老年 运动会 上 ， 刘 大伯 和 李 大伯 都 参加 了 长跑 比赛 ， 全程 1.5 千米 ， 刘 大伯 用 了 9.7 分钟 跑 完 ， 李 大伯 比 他 多用 了 2 分钟 ， 李 大伯 跑 1 千米 平均 需要 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4200", "content": "一 个数 的 50 倍 是 300 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2516", "content": "仓库 里 有 180 吨 货物 ， 第一天 运走 46.8 吨 ， 第 二 天 运走 47.5 吨 ， 仓库 里 货物 减少 了 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18196", "content": "一 个数 的 (1/10) 是 90 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20252", "content": "每 筐 梨 30 千克 ， 每 筐 苹果 20 千克 ． 21 筐 梨 ， 22 筐 苹果 ， 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21204", "content": "在 一批 旅客 中 ， 有 (3/4) 的 人 懂 法语 ， (4/5) 的 人 懂 英语 ， 两种 语言 都 懂 的 占 (13/20) ， 另 有 10 人 这 两种 语言 都 不 懂 ． 这 批 旅客 有 多少 名 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7525", "content": "实验 小学 图书馆 新 购进 一批 图书 ， 图书馆 从 这些 图书 中 拿出 780 本分 给 6 个 年级 ， 每个 年级 2 个 班 ． 平均 每个 班 能 分 多少 本 图书 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10208", "content": "一 堆 西瓜 的 (3/8) 正好 是 450 千克 ， 如果 卖出 它 的 (1/4) ， 还 剩下 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19474", "content": "一 棵 树 的 树干 直径 是 40 厘米 ， 一根 绳子 绕 树 10 圈 后 还 多出 44 厘米 ． 这根 绳子 长 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15042", "content": "玩具厂 生产 一批 玩具 ， 原 计划 每天 生产 240 个 ， 12 天 完成 任务 ． 实际 每天 比 原 计划 多 生产 80 个 ， 实际 需 多少 天 就 可以 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9774", "content": "蜂蜜 中 糖分 占 (3/4) ， 20 克 蜂蜜 中 ， 含糖 多少 克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3652", "content": "一 堆 煤 重 (4/5) 吨 ， 第一天 用 去 了 (1/5) ， 第一天 用 去 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5476", "content": "周日 ， 小 明 和 爸爸 骑 自行车 去 郊游 ， 第一 小时 骑 了 全程 的 20% ， 第 二 小时 比 第一 小时 少 骑 了 4 千米 ． 此时 距 目的地 还有 全程 的 65% ， 求 全程 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8734", "content": "园林局 种 了 1500 棵 树 ， 成活率 为 98% ， 有 多少 棵 树 未 成活 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21053", "content": "商店 举办 促销 活动 ， 某 商品 比 原价 下降 了 (1/5) ， 现 售价 为 1440 元 ， 问 该 商品 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15768", "content": "一 件 衣服 进价 150 元 ， 按 售价 的 0.6 售出 仍 赚 30 元 ， 则 售价 为 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15337", "content": "某校 原有 科技 书 和 文艺 书 共 630 本 ， 其中 科技 书 与 文艺 书 的 比 为 1 ： 4 ， 后来 又 买进 一些 科技 书 ， 这时 科技 书 与 文艺 书 的 比 为 3 ： 7 ， 问 买进 科技 书 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "13551", "content": "小 明 用 (1/5) 小时 做 了 作业 的 40% ， 照 这样 计算 ， 完成 这项 作业 共 要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16188", "content": "实验 小学 绘画 组 有 男同学 16 人 ， 女同学 18 人 ， 合唱队 的 人数 是 绘画 组 的 4 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19392", "content": "食堂 有 煤 3 吨 ， 平均 每天 烧 (3/7) 吨 ， 可以 烧 多少 天 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16289", "content": "停车场 有 32 辆 大 汽车 ， 小汽车 比 大 汽车 多 18 辆 ， 小汽车 有 多少 辆 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22147", "content": "一 个 圆柱 体积 为 900 立方厘米 ， 高 为 15 厘米 ， 底 面积 = 多少 平方厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17245", "content": "一 辆 公共汽车 ， 从 起点站 开出 时 车上 座位 刚好 坐满 ， 中途 有 (1/6) 的 人 下车 ， 又 上车 10 人 ， 这样 有 6 人 没有 座位 ， 这时 车上 有 乘客 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "625", "content": "一 辆 汽车 上午 3 小时 行 273 千米 ． 照 这样 的 速度 ， 下午 又 行 了 4 小时 ， 全天 一共 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4470", "content": "要 修 一条 路 ， 已经 修好 了 全路 的 (5/9) ， 还 剩 全路 的 几分 之 几 没 修 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10281", "content": "小 欣 有 30 张 邮票 ， 送给 弟弟 6 张 ， 剩下 的 邮票 是 原来 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "756", "content": "工人 要 修 一条 路 ， 第一个 月 修 了 全程 的 (5/12) ， 第 二 个 月 修 了 全程 的 37.5% ， 两个 月 共 修 了 5700 米 ． 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5847", "content": "张 勇 与 李 龙 分别 从 a 城 、 b 城 同时 出发 ， 开车 到 c 城 参加 母校 校庆 活动 ． a 城 到 c 城 与 b 城 到 c 城 的 距离 比 是 2 ： 3 ， 他们 两 人 开车 的 速度 都 是 每 小时 80 千米 ． 到达 c 城 ， 李 龙 比 张 勇 晚 了 (3/4) 小时 ， 求 从 a 城 经 c 城 到 b 城 的 路程 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3205", "content": "修 一条 500 米 长 的 铁路 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 全长 的 30% ， 两天 共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5725", "content": "一 堆 钢管 ， 最上层 有 2 根 ， 最 下层 有 12 根 ， 相邻 两层 相差 1 根 ， 这 堆 钢管 一共 有 多少 根 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6320", "content": "学校 举行 歌唱 比赛 ， 6 名 评委 给 5 （ 8 ） 班 评分 ， 如果 去掉 一个 最高分 ， 平均分 86.7 分 ， 如果 去掉 一个 最低 分 ， 平均分 88.9 分 ， 最高分 比 最低 分 多 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17605", "content": "一 辆 汽车 里 有 乘客 32 人 ， 到 邮电 大楼 站 下去 9 人 ． 又 上来 13 人 ， 这时 车上 有 乘客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9741", "content": "一 种 铁丝 20 米 重 5 千克 ， 如果 一捆 同样 的 铁丝 150 千克 ， 这 捆 铁丝 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1670", "content": "小巧 看 一本 故事书 ， 每天 看 8 页 ， 12 天 看 完全 书 的 一半 ． 从这以后 ， 她 每天 看 的 页数 是 原来 的 2 倍 ， 看 完 剩下 的 页数 还要 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21936", "content": "一 个 电影院 共有 812 个 座位 ． 每张 电影票 的 价格 是 15 元 ， 这 一场 正好 满场 ． 这场 电影 的 收入 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9219", "content": "一 个 图书室 借出 1200 本书 后 ， 剩下 的 部分 比 原来 本 数 的 (3/4) 少 300 本 ， 这个 图书馆 原有 书 多少 本 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "863", "content": "一 根 铁丝 长 80.14 米 ， 先 截去 8.5 米 ， 剩下 的 平均 截 成 12 段 ， 每 段长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6127", "content": "某 水果 批发 站 运 来 桔子 1.25 吨 ， 比 运 来 的 苹果 多 0.45 吨 ， 两种 水果 共运 来 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11122", "content": "小 刚 骑 自行车 走 125.6 米 ， 车轮 正好 转 了 50 圈 ， 这辆 自行车 车轮 直径 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2015", "content": "李 阿姨 把 30000 元 存入 银行 ， 定期 5 年 ， 年利率 是 5.50% ， 到期 时 ， 她 总共 可以 从 银行 取回 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19686", "content": "(1/2) 与 0.25 的 差 再 加上 (3/4) / 25% 的 商 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13724", "content": "一 幢 大楼 地面 以上 最高层 记录 为 + 18 层 ， 地面 以下 最底层 记 为 - 5 层 ， 这幢 大楼 共有 多少 层 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11422", "content": "教室 里 有 7 名 学生 ， 平均年龄 10 岁 ， 来 了 一位 老师 ， 这时 8 人 的 年均 年龄 为 12 岁 ． 老师 的 年龄 = 多少岁 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11526", "content": "一 个 平行四边形 果园 ， 底 为 130 米 ， 高 为 30 米 ． 共 种 390 棵 果树 ， 平均 每棵 果树 占地 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10019", "content": "一 辆 汽车 前 2 小时 行驶 130 千米 ， 后 3 小时 行驶 220 千米 ． 这辆 汽车 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17833", "content": "一 个 畜牧场 卖出 肉牛 头数 的 (3/8) ， 还 剩 250 头 ． 这个 畜牧场 原有 肉牛 多少 头 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15935", "content": "修路 队 修 一条 路 ， 如果 每天 修 200 米 ， 15 天 可以 修 完 ． 如果 要求 10 天 修 完 ， 那么 每天 需要 多 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "434", "content": "甲 、 乙 两个 工程队 修 一条 长 1400 米 的 公路 ， 他们 从 两端 同时 开工 ， 甲队 每天 修 80 米 ， 乙 队 每天 修 60 米 ， 多少 天 后 能够 修 完 这 条 公路 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17846", "content": "运 一批 货物 ， 第一天 运 了 240 吨 ， 第 二 天运 了 这 批 货物 的 (2/5) ， 还 剩 15 吨 没有 运 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17589", "content": "养鸡场 卖出 一批 肉鸡 ， 第一次 卖出 肉鸡 总数 的 (2/5) ， 第 二 次 卖出 肉鸡 总数 的 (1/3) ， 还 剩 肉鸡 1200 只 ， 鸡场 有 肉鸡 共 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22863", "content": "王 叔叔 想 买 一台 6500 元 的 电脑 ， 他 现在 有 存款 5876 元 ， 如果 每月 存 78 元 ， 需要 存款 几个 月 才 能够 买 到 电脑 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7077", "content": "一 瓶 墨水 60 毫升 ， 用 去 (2/5) ， 还 剩 多少 毫升 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4967", "content": "某 小区 有 12 栋 居民楼 ， 每栋 楼 有 15 层 ， 每层 有 8 户 ， 每栋 楼 有 多少 户 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13146", "content": "(3/4) 与 (4/5) 的 和 的 (5/11) = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "533", "content": "3 个 2.4 的 和 加上 某 数 的 4 倍 得 10 ， 某 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12064", "content": "边长 4 分 米 的 正方形 相框 ， 它 的 周长 = 多少 分 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12076", "content": "多少 千米 的 40% 是 5 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9913", "content": "小 明 为 山区 小朋友 捐款 27 元 ， 小 红 捐 的 钱 是 小 明 的 (4/9) ， 小 玲 捐 的 钱 是 小 红 的 (2/3) ， 小 玲 捐款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1720", "content": "王师傅 要 加工 690 个 零件 ， 已经 完成 242 个 ， 余下 的 每 小时 加工 32 个 ， 还要 几小时 才能 全部 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11302", "content": "一 桶 油 连 桶 重 12 千克 ， 卖出 油 的 一半 后 ， 连 桶 重 6.75 千克 ． 如果 每千克 油 的 价格 是 4.2 元 ， 卖出 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8254", "content": "电视机厂 试制 一批 新 产品 ， 原 计划 每天 生产 40 台 ， 30 天 完成 ， 实际 每天 比 计划 增产 25% ， 实际 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8772", "content": "某 玩具店 计划 生产 150 件 玩具 ， 第一天 完成 了 计划 的 (1/5) ， 第 二 天 完成 了 计划 的 (2/3) ， 两天 共 生产 了 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4485", "content": "一 个数 加上 40% 等于 28 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13459", "content": "今年 秋天 ， 李 叔叔 家 的 果园 收 了 320 千克 红枣 ， 收 的 橘子 是 红枣 的 17 倍 ． 李 叔叔 家 收 橘子 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12757", "content": "有 一条 绳子 ， 第一天 用 去 45% ， 第 二 天 用 去 (1/5) ， 还 剩下 70 米 ， 这 条 绳子 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7159", "content": "《 安徒生 童话 》 每 本 原价 12 元 ， 现在 的 促销价 是 9 元 ， 现价 比 原价 便宜 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21790", "content": "凌云 大厦 3 月份 共 卖出 16 箱 苹果 ， 每箱 25 千克 ， 每千克 苹果 4 元 ， 一共 收入 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16225", "content": "副食店 运 来 480 千克 鸡蛋 ， 上午 卖出 150 千克 ， 下午 卖出 200 千克 ， 还 剩 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20504", "content": "一 种 笔记本 打 0.9 出售 ． 园 园 买 了 一本 比 原价 便宜 了 1.2 元 ， 笔记本 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3239", "content": "小 田 参加 了 市 上 的 兵 乓 球赛 ， 赛后 和 每个 参赛 的 运动员 都 握 了 一次 手 ， 她 一共 握 了 7 次 手 ， 这次 参加 比赛 的 有 几名 运动员 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1915", "content": "甲 、 乙 两车 分别 从 a 、 b 两地 同时 相向 开出 ， 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 70 千米 ， 5 小时 相遇 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11162", "content": "小 明 的 家住 在 6 楼 ， 他 每 上 一层楼 要 走 16 个 台阶 ， 他 从 一楼 回家 要 走 多少级 台阶 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6239", "content": "新区 小学 的 同学 去 栽树 ， 上午 栽 了 316 棵 ， 下午 3 小时 栽 了 252 棵 ． 下午 平均 每 小时 栽 了 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11581", "content": "耕 一块 地 ， 上午 耕 了 这块 地 的 (2/5) ， 下午 比 上午 多 耕 14 公顷 ， 正好 耕 完 ， 求 这块 地 共 多少 公顷 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14002", "content": "在 一条 长 75 米 的 长廊 一边 摆 花盆 ， 起点 和 终点 都 摆 ， 一共 摆 了 26 盆 ． 相邻 两 盆花 之间 的 距离 相等 ， 相邻 两 盆花 之间 相距 多 远 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22299", "content": "一 个 比 的 比值 是 3 ， 比 的 后 项 是 (3/4) ， 这个 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3591", "content": "依法 纳税 是 每个 公民 的 义务 ． 张老师 上个月 的 工资总额 为 1840 元 ， 按照 个人所得税法 的 有关 规定 ， 超过 1200 元 的 部分 要 缴纳 5% 的 个人所得税 ， 那么 张老师 上个月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17710", "content": "一 辆 汽车 去 省城 ， 去 时 用 了 5 小时 ， 回来 时 用 了 3 小时 ． 如果 去 时 的 速度 是 42 千米 / 时 ， 回来 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6405", "content": "2 / 3 / （ 4 / 6 ） = ．", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5615", "content": "小 明 和 小 华 存钱 数 的 比 是 3 ： 5 ， 如果 小 明 再 存入 400 元 ， 就 和 小 华 的 存钱 一样 多 ． 小 明 原来 存 了 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12935", "content": "一 种 电脑 原价 6800 元 ， 现 降价 1700 元 ， 降价 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11421", "content": "一 段 墙壁 ， 绘画 用 去 (3/6) ， 写 标语 用 去 (2/6) ， 一 共用 去 了 这 段 墙壁 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3237", "content": "修路 队 计划 20 天 修路 960 米 ， 实际 提前 4 天 完成 了 任务 ， 实际 每天 修路 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19303", "content": "已知 两个 数 的 和 是 85.7 ， 其中 一个 加数 是 15.7 ， 求 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "883", "content": "小 华 从 家里 已 走出 200 米 ， 她 的 姐姐 从 家里 骑 自行车 去 追 小 华 ． 已知 小 华 每分钟 走 70 米 ， 姐姐 骑 自行车 每分钟 行 120 米 ． 姐姐 追 上 小 华 需要 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16275", "content": "看 电影 一班 去 了 42 个 学生 二 班 去 了 34 个 学生 还 去 了 带队 的 2 位 班主任 ， 其中 学生票 6 元 ， 成人 票 12 元 请问 买票 一共 要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15088", "content": "一 本 科技 书 ， 小 明 第一天 看 了 (1/15) ， 第 二 天 看 了 全书 的 (1/10) ， 剩下 没有 看 的 占 全书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18271", "content": "6 （ 1 ） 班 52 名 同学 去 海洋 宾馆 游玩 ， 中午 时 老师 让 贝 贝 给 大家 去 买 饮料 ． 由于 买 的 多 ， 阿姨 给 “ 买 一箱 送 一盒 ” 的 优惠 ， 贝 贝 付 了 买 4 箱 的 钱 ， 正好 每人 一盒 ． 你 知道 每箱 饮料 有 多少 盒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4930", "content": "学校 买 回 大米 和 面粉 各 50 袋 ， 大米 每 袋 75 千克 ， 面粉 每 袋 25 千克 ， 买 回 的 大米 和 面粉 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "901", "content": "我国 今年 5 月份 火车 再次 提速 后 ， 一列 火车 每 小时 可行 160 千米 ． 这样 这 列 火车 从 北京 到 广州 只用 15 小时 ， 比 原来 少 花 了 3 小时 ． 这 列 火车 提速 前 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22542", "content": "一 头 大象 重 5 吨 ， 一条 鲸鱼 重 153 吨 ． 鲸鱼 的 体重 是 大象 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16854", "content": "4 个 房间 ， 每个 房间 不少 于 2 人 ， 其余 3 个 房间 不少 于 8 人 ， 这 4 个 房间 至少 有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1846", "content": "一 个 除法 算式 ， 除数 是 32 ， 商 是 8 ， 余数 是 12 ， 求 被除数 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3143", "content": "修 一条 公路 ， 已经 修 完 840 米 ， 还 剩下 全长 的 (3/4) ． 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18471", "content": "实验 小学 全校学生 人数 的 (2/9) 是 400 人 ， 实验 小学 共有 学生 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10393", "content": "有 两盒 彩球 ， 甲 盒 有 200 个 ， 如果 从 甲 盒 中 取出 (1/5) 放入 乙 盒 ， 两盒 彩球 个数 相等 ． 乙 盒 原有 彩球 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "63", "content": "学校 走廊 的 柱子 高 3 米 ， 底面 周长 3.14 米 ， 给 100 根 这样 的 柱子 刷油漆 ， 每千克 油漆 可以 漆 2 平方米 ， 一共 要 用 油漆 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21462", "content": "在 一个 袋子 里 装 了 6 只 铅笔 ， 1 枝 红 的 2 支 黄 的 3 支 蓝 的 ， 让 你 每次 任意 摸 一支 ， 这样 摸 若干次 ， 摸 出 黄 铅笔 次数 约 占 总 次数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15804", "content": "苗圃 园 要 出售 一批 树苗 ， 计划 出售 的 树苗 有 24 行 ， 每行 60 棵 ， 按照 市场价 每棵 树苗 25 元 计算 ， 预计 能 卖 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23112", "content": "商店 有 大米 180 袋 ， 比 面粉 的 (2/5) 多 30 袋 ， 面粉 有 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17832", "content": "把 5 克 盐 放入 355 克 水中 ， 盐 的 重量 占 盐水 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15923", "content": "把 56.8 平均 分成 8 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17648", "content": "一 本 故事书 共 120 页 ， 第一天 和 第 二 天 共 看 了 全书 的 (5/8) ， 若 第 3 天 接着 看 ， 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10268", "content": "两个 数 之 和 是 28 ， 大数 除以 小数 商 3 ， 且 没有 余数 ， 大数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9594", "content": "5 里面 有 多少 个 0.01 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17049", "content": "甲乙 两地 相距 420 千米 ， 一辆 汽车 行驶 了 全程 的 (5/7) ， 行驶 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15269", "content": "一 个数 的 2.5 倍 比 它 本身 多 30 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7940", "content": "用 250 粒 黄豆 做 发芽 实验 ， 已知 发芽率 是 98% ， 有 多少 粒 黄豆 没有 发芽 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11317", "content": "水果店 运进 450 千克 苹果 ， 已经 卖 了 240 千克 ， 还 剩下 6 箱 ， 平均 每箱 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10021", "content": "一 堆 煤 ， 用 去 总数 的 (2/5) ， 这时 用 去 的 比 剩下 的 少 30 吨 ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11187", "content": "乙 数 比 40 多 20% ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16386", "content": "为了 实施 “ 振兴 阅读 计划 ” ， 学校 图书馆 把 512 本 图书 平均 借给 8 个 班 ， 平均 每个 班 可 借 到 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3470", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 (5/8) ， 离 乙地 还有 243 千米 ． 两地 之间 的 公路 长 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18330", "content": "迎宾 超市 去年 上半年 纯收入 240 万元 ， 比 下半年 少 (1/4) ， 超市 去年 全年 纯收入 多少 万元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5378", "content": "小 明 在 超市 购买 了 7 瓶 矿泉水 ， 他 付给 营业员 10 元 钱 ， 找回 了 1.04 元 ， 每瓶 矿泉水 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1198", "content": "公园 里 新种 359 棵 树 ， 其中 杨树 196 棵 ， 剩下 的 是 柳树 ， 柳树 有 多少 棵 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19796", "content": "两个 工程队 合 铺 一段 地下 石油 管道 ． 铺 完 时 甲队 铺 了 全长 的 40% ， 乙 队 比 甲队 多 铺 了 2.4 千米 ． 这 段 石油 管道 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21621", "content": "(5/2) 千克 的 (3/2) 与 多少 的 5 倍 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21213", "content": "29 与 31 的 和 去除 240 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11260", "content": "一 家 饭店 十 月份 按照 15% 的 税率 交纳 了 营业税 后 ， 实际收入 17850 元 ． 这个 饭店 税前 的 收入 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4747", "content": "一 件 工作 ， 原 计划 10 天 完成 ， 实际 8 天 完成 ， 工作 时间 缩短 了 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21347", "content": "六年级 有 学生 112 人 ， 其中 男生 占 (5/8) ， 后来 又 转 来 女生 若干 人 ， 这时 男生 和 女生 人数 的 比 是 5 ： 4 ． 现在 女生 有 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "1430", "content": "开心 农场 今年 养鸡 3.6 万 只 ， 比 去年 的 2 倍 少 0.34 万 只 ， 去年 养鸡 多少 万 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21364", "content": "在 第一次 阅兵式 上 ， 因为 是 我们 祖国 刚刚 成立 所以 只有 28 个 方队 参加 ， 它 只是 我们 今年 阅兵式 方队 的 (1/2) ． 你 知道 我们 今年 有 多少 个 方队 参加 阅兵式 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20684", "content": "李老师 骑 自行车 上班 ， 每分钟 能 行 180 米 ， 他 从 家 到 学校 要 用 40 分钟 ． 李老师 家 离 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21755", "content": "工人 制作 一批 零件 ， 3 天 完成 这 批 零件 的 (2/5) ， 多少 天 可以 完成 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5257", "content": "一 辆 轿车 从 a 地 开往 b 地 ， 每 小时 100 千米 ， 经过 (9/2) 小时 到达 ， 如果 要 提前 (3/2) 小时 到达 ， 每 小时 应该 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20287", "content": "一 种 压路机 的 滚筒 是 圆柱体 ， 它 的 底面 直径 是 1 米 ， 长 1.5 米 ， 如果 它 滚动 5 周 ， 一共 压路 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "16882", "content": "一 件 衣服 原价 是 80 元 ， 打 0.8 销售 ， 则 现价 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6807", "content": "2003 年 ， 我国 西部 农村居民 年 人均收入 约 为 2800 元 ， 大约 相当于 全国 农村居民 人均 年收入 的 80% ， 全国 农村居民 人均 年收入 约 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1837", "content": "学校 运动会 上 ， 某班 参加 比赛 的 女生 占 全班 人数 的 (1/6) ， 参加 比赛 的 男生 占 全班 人数 的 (1/4) ， 参加 比赛 的 男生 比 女生 多 4 人 ， 这个 班 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4396", "content": "实验 小学 男生 有 400 人 ， 女生 人数 比 男生 多 20% ， 实验 小学 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12923", "content": "体育馆 的 看台 一排 有 28 个 座位 ， 爸爸 和 小 奇 去 看 比赛 ， 他们 俩 坐在 一起 ， 并且 小 奇 坐在 爸爸 的 左边 ． 在 同 一排 有 多少 种 不同 的 坐 法 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7702", "content": "天乐 养鸡场 今天 捡 了 3020 只 鸡蛋 ， 李 阿姨 把 鸡蛋 装 成 60 箱 后 ， 还 剩 20 只 ． 平均 每箱 鸡蛋 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10033", "content": "黄 凤蝶 在 飞行 时 每 分 扇动翅膀 300 次 ， 粉蝶 在 飞行 时 每 分 扇动翅膀 的 次数 比 黄 凤蝶 多 60% ， 粉蝶 在 飞行 时 每 分 扇动翅膀 多少 次 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13516", "content": "小 华 存 了 45 元 的 零用钱 ， 他 拿出 其中 的 (5/9) 捐给 了 地震 灾区 的 希望 小学 ． 小 华 捐 了 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8411", "content": "张 叔叔 这个 月 给 某 公司 搞 了 一个 小型 装修 ， 一次性 从 公司 领到 劳务费 4000 元 ， 如果 超过 800 元 后 的 余额 ， 按照 20% 的 税率 缴纳 个人所得税 ． 张 叔叔 应该 缴纳 税款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16432", "content": "食堂 运 来 一批 大米 ， 第一次 吃 了 (1/8) ， 第 二 次 吃 了 25% ， 还 剩 300 千克 ， 请问 这 批 大米 一共 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1561", "content": "计算 ： （ 5.25 + 0.125 + 5.75 ） * 8 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "294", "content": "一 条 绳子 长 4 米 ， 用 去 (1/4) 米 ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16802", "content": "一 批 黄瓜 有 48 筐 ， 每 筐 125 千克 ， 平均 装 在 4 辆 车上 ， 每辆车 运 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20414", "content": "航模 兴趣小组 有 27 人 ， 比 原来 人数 增加 了 (1/8) ， 航模 小组 原有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10123", "content": "苏果超市 运进 透明皂 360 块 ， 是 运进 香皂 块 数 的 1.5 倍 ， 苏果超市 运进 香皂 多少 块 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9869", "content": "小 亮 体重 27.5 千克 ， 爸爸 的 体重 是 小 亮 的 2.6 倍 ， 爸爸 和 小 亮 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7606", "content": "甲乙 两个 仓库 ， 如果 从 甲 仓库 运出 15 吨 粮食 放入 乙 仓库 ， 这时 乙 仓库 的 粮食 是 甲 仓库 的 (5/7) ， 已知 乙 仓库 原有 粮食 35 吨 ， 甲 仓库 原有 粮食 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10810", "content": "车站 有 一批 货物 ， 如果 运走 它 的 25% ， 剩下 156 吨 ， 如果 运走 它 的 (9/16) ， 运走 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22817", "content": "在 新 新 小学 的 校园 里 ， 种 的 杨树 棵 数 是 槐树 棵 数 的 3 倍 ， 种 的 槐树 的 棵 数 是 松树 棵 数 的 4 倍 ， 槐树 有 36 棵 ， 问 杨树 、 槐树 、 松树 共有 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1428", "content": "3800 - （ 160 + 13 * 22 ） 先 算 多少 ， 得数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5651", "content": "一 辆 小车 每次 可 运 沙 (1/3) 吨 ， 5 次 可 运 沙 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10350", "content": "[ ( 75% + 1 / (4/27) ) * 4.8 - 26 ] / ( (3/5) * 8 - 2.8 ) = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "21661", "content": "学校 原 计划 派出 15 名 同学 参加 数学 夏令营 活动 ， 实际 派出 了 21 名 同学 ， 实际 比 计划 多 派出 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4268", "content": "小 明 计划 3 天 读完 一本 故事书 ， 第一天 读 了 24 页 ， 占 全书 的 (2/9) ， 还要 读 多少 页 才能 读完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3753", "content": "四年级 二 班 有 6 个 小组 ， 每组 8 人 ， 共 种 向日葵 96 棵 ． 平均 每人 种 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15547", "content": "拖拉机 耕地 ， 上午 耕 这块 地 的 45% ， 下午 比 上午 多 耕 4.8 公亩 ， 正好 耕 完 ． 这块 地 共 多少 公亩 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3076", "content": "玩具厂 生产 某种 玩具 的 成本 是 37.4 元 ， 比 过去 降低 了 6.6 元 ， 成本 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22772", "content": "一 个 长 8 厘米 ， 宽 4 厘米 ， 高 5 厘米 的 长 万 体 ， 它 的 体积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2698", "content": "商店 运 来 一些 苹果 和 梨 ， 5 筐 苹果 的 重量 和 4 筐 梨 的 重量 相等 ， 每 筐 苹果 重 20 千克 ， 那么 每 筐 梨 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9167", "content": "爸爸 上 月 买 了 一部 手机 ， 花 了 1350 元 ， 占 月工资 的 60% ， 爸爸 的 月工资 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16055", "content": "四年级 一般 全体学生 参加 智能 测试 共 做 两道 题 ， 其中 ， 答对 第一 题 的 有 35 人 ， 答对 第 2 题 的 有 23 人 ， 两道 题 都 答对 的 有 18 人 两道 题 都 做 错 的 有 10 人 ， 这个 班 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6478", "content": "小客车 的 辆数 是 大客车 的 160% ， 小客车 的 辆数 比 大客车 多 多少 % ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19439", "content": "张 华 借来 一本 116 页 的 书 ， 看 了 7 天 后 还 剩下 53 页 ， 他 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16777", "content": "学校 体育 队 共有 体育 队员 32 人 ， 每人 买 一套 价格 是 98 元 的 运动服 ， 共 需要 多少 元 钱 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1496", "content": "家家 旺 超市 原来 有 苹果 480 千克 ， 梨子 320 千克 ， 又 运 来 苹果 20 筐 ， 每 筐 25 千克 ． 现在 一共 有 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21776", "content": "货场 有 一批 大米 ， 第 1 天 运走 总数 的 (2/5) ， 第 2 天 运走 1500 袋 ， 还 剩 900 袋 ． 这 批 大米 一共 有 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10764", "content": "林场 计划 栽 柳树 240 棵 ， 实际 比 计划 多 栽 了 60 棵 ， 实际 比 计划 多 栽 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15079", "content": "有 28 位 小朋友 排成 一行 ． 从 左边 开始 数 第 10 位 是 张 华 ， 从 右边 开始 数 他 是 第 多少 位 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "401", "content": "一 个 玩具厂 原来 准备 做 180 个 毛绒 兔 的 材料 ， 每个 需要 3.8 元 ． 后来 改进 了 制作方法 ， 每个 只 需要 3.6 元 的 材料 ． 现在 可以 做 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10420", "content": "一 个 工人 计划 4 小时 生产 零件 80 个 ， 技术 改进 后 ， 4.5 小时 加工 零件 180 个 ， 现在 每 小时 比 原来 每 小时 多 做 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1876", "content": "育 红 小学同学 们 去 植树 ， 四年级 植树 69 棵 ， 是 三年级 同学 植树 棵 数 的 3 倍 ． 五年级 植树 棵 数 比 3 、 四年级 植树 的 总数 多 15 棵 ， 五年级 同学 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21838", "content": "菜市场 运 来 西红柿 315 千克 ， 运 来 萝卜 的 重量 是 西红柿 的 4 倍 ， 西红柿 比 萝卜 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7110", "content": "某 厂 有 女职工 450 人 ， 是 全厂 男 职工 人数 的 (6/7) ． 这个 厂 共有 职工 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9995", "content": "成昆铁路 全长 1100 千米 ， 桥梁 和 隧道 占 全长 的 (2/5) ． 桥梁 和 隧道 长 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20091", "content": "一 批 产品 中 次品 与 合格品 的 比 是 1 ： 24 ， 这 批 产品 的 合格率 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15789", "content": "学校 买 了 一批 新书 ， 其中 故事书 有 30 本 ， 科技 树 有 18 本 ， 共 占 这 批 新书 的 (3/5) ． 这 批 新书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12638", "content": "某 电视机厂 原 计划 每月 生产 彩电 3000 台 ， 结果 上 半月 完成 了 原 计划 的 60% ， 下半月 比 上 半月 多 完成 了 (1/10) ． 求全 月 生产 的 彩电 比 原 计划 超额 百分之几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10258", "content": "1 千克 的 (2/5) = 多少 千克 的 (1/5) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10738", "content": "淘气 全家 5 一 假期 开车 去 北京 游玩 ， 车速 90.5 千米 / 小时 ， 行驶 了 4.5 小时 到达 目的地 ， 算 一 算 他们 共 走 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17399", "content": "某班 在 一次 测验 中 ， 有 26 人 语文 获 优 ， 有 30 人 数学 获 优 ， 其中 语 数 双优 的 有 12 人 ， 另外 有 4 人 语 数 成绩 均 未获 优 ， 这个 班 共有 多少 个 学生 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5716", "content": "为了 美化 贺兰 ， 已知 一种 树苗 的 成活率 是 96% ， 为了 保证 成活 480 棵 ， 请 你 算 一 算 至少 要 种 多少 棵 树苗 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3229", "content": "一 根 铁丝 长 (4/5) m ， 剪掉 (1/4) m ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20284", "content": "小 明 去 超市 购 了 50 元 的 货物 ， 用 去 了 所 带 钱款 的 (4/5) ， 求 小 明 带 了 多少 钱款 去 超市 购物 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19644", "content": "一 种 小汽车 的 速度 可以 达到 每 小时 180 千米 ， 比 一种 超音速 飞机 慢 (7/8) ． 这种 超音速 飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16834", "content": "阳光 机械厂 有 男 职工 120 人 ， 男 职工 人数 是 女职工 的 80% ． 阳光 机械厂 有 女职工 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15291", "content": "1000 - 2 个 15 相乘 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12823", "content": "小 红 每天 用 40 分钟 的 时间 锻炼身体 ， 小 伟 所用 的 时间 是 小 红 的 (6/5) ， 小 红 所用 时间 的 (4/5) 等于 小雨 用 的 时间 ． 小 伟 比 小雨 每天 多用 多少 时间 锻炼身体 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16721", "content": "星星 果品 批发部 运 来 26 箱 苹果 和 40 箱 梨 ， 苹果 每箱 20 千克 ， 梨 每箱 15 千克 ． 运 来 的 苹果 和 梨 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16217", "content": "多少 / 18 = 22 … 11 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19297", "content": "红星村 今年 小麦 总产量 是 55 吨 ， 比 去年 增产 (1/10) ， 去年 小麦 总产量 = 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12593", "content": "长江 、 黄河 号 两 货轮 ， 分别 从 相距 500 千米 的 甲 、 乙 两 洪 相向 而 行 ， 8 小时 后 两 相遇 ． 长江 号 的 航行 速度 为 每 小时 50 千米 ， 黄河 号 货轮 每 小时 航行 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11855", "content": "甲 数 是 120 ， 乙 数 是 甲 的 4 倍 ， 乙 数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13096", "content": "两 数 相乘 ， 若 被乘数 增加 8 ， 乘数 不变 ， 则 积 增加 104 ； 若 被乘数 不变 ， 乘数 增加 2 ， 则 积 增加 14 ． 那么 原来 的 积 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9808", "content": "甲 、 乙 两地 相距 820 千米 ， a 车 从 甲 开往 乙 ， 每 小时 行驶 80 千米 ， 开出 2 小时 后 ， b 车 才 从 乙地 开往 甲地 ， 每 小时 行驶 85 千米 ． 两车 还要 经过 多少 小时 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10436", "content": "王大妈 养 了 2 只 公鸡 ， 6 只 母鸡 ， 共生 了 24 个 蛋 ． 平均 一只 鸡 生 多少 个 蛋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13744", "content": "蓝天 小学 9 月份 用水 480 吨 ， 比 10 月份 多 用水 20% ． 该校 这 两个 月 共 用水 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5400", "content": "一 袋 巧克力 有 30 块 ， 笑笑 吃 了 (1/3) ， 吃 了 多少 块 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5547", "content": "在 一次 测试 中 ， 张 良 伟 语文 考 了 90 分 ， 刘 仁 杰 的 分数 是 张 良 伟 的 (8/9) ， 刘 仁 杰 考 了 多少 分 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12836", "content": "闽 星 小区 美化环境 要 种植 一批 树苗 ， 这 批 树苗 的 成活率 为 75% - 80% ， 如果 小区 要 种 活 240 棵 树苗 ， 那么 至少 应 种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17929", "content": "王 华 家 离 学校 有 720 米左右 ， 早上 他 通常 以 每分钟 走 80 米 的 速度 去 上学 ， 路上 要 花 几分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1882", "content": "两辆 汽车 同时 从 甲乙 两城 相对 开出 ， 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 60 千米 ， 11 小时 相遇 ， 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10191", "content": "一 个 加工厂 加工 大米 5000 千克 ， 3 小时 加工 了 1500 千克 ， 照 这样 计算 ， 加工 完 剩下 的 大米 还要 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7391", "content": "早上 妈妈 步行 出发 上班 ， 每分钟 行 70 米 ． 6 分钟 后 爸爸 发现 妈妈 忘 了 带 手机 ， 爸爸 以 每分钟 210 米 的 速度 骑车去 追 妈妈 ． 经过 多少 分钟 后 爸爸 能 追 上 妈妈 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8917", "content": "李老师 把 5000 元 存入 银行 ， 存 定期 3 年 ， 年利率 是 2.79% ， 到 期限 时 银行 共 付给 李老师 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "288", "content": "一 本 故事书 ， 小 明 每天 看 5 页 ， 看 了 9 天 ， 还 剩 25 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1463", "content": "配制 一种 稀释液 ， 药粉 和 水 的 质量 比 是 1 ： 25 ， 如果 配制 这种 稀释液 520 千克 ， 需要 药粉 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14051", "content": "工地 需要 1230 吨 水泥 ， 每次 用 5 辆 货车 运 ， 每辆 货车 载 水泥 12 吨 ， 这些 货车 运 了 20 次 后 ， 还有 多少 吨 水泥 没有 运 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13931", "content": "小 新 身高 1.32 米 ， 比 张 明 矮 0.08 米 ， 李 红 比 张 明 高 0.15 米 ． 李 红 身高 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8559", "content": "一 盒 牛奶 ， 奶奶 喝 了 (2/9) ， 红红 喝 了 (4/9) ， 其余 是 小 明 喝 的 ， 小 明 喝 了 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9272", "content": "24 与 15 的 差 去除 396 ， 所得 的 商 再 加上 77 ， 结果 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1030", "content": "学校 运 来 故事书 和 科技 书 各 8 箱 ， 每箱 故事书 有 25 本 ， 每箱 科技 书 30 本 ． 一共 运 来 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1797", "content": "李师傅 准备 15 天 加工 零件 420 个 ． 实际 提前 3 天 完成 了 任务 ， 实际 每天 多 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22904", "content": "某 剧场 能 坐 870 人 ， 一场 电影 的 票价 是 70 元 ， 这场 电影 的 票房 收入 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5993", "content": "水果店 运 来 100 筐 梨 ， 每 筐 重 35 千克 ， 一共 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22047", "content": "甲 数 是 32 ， 它 的 (1/8) 相当于 乙 数 的 (1/5) ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2225", "content": "西 丽 小区 新建 了 25 栋 楼房 ， 每栋 有 6 层 ， 每层 有 8 户 ． 新建 的 楼房 可 住 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12324", "content": "甲乙 两 数 的 比 是 8 ： 5 ， 乙 数 是 25 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17989", "content": "一 堆 煤 ， 第一次 运走 5 吨 ， 第 二 次 运走 了 这 堆 煤 的 37.5% ， 还 剩下 (1/2) ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15430", "content": "兴建 “ 希望 小学 ” 的 实际 投资 只 占 原 计划 的 80% ， 实际 投资 36 万元 ， 节约 了 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2178", "content": "一 件 上衣 240 元 ， 一条 裤子 120 元 ， 如果 买 套装 可以 打 0.8 ， 小 红 想 买 一件 上衣 和 一条 裤子 最少 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8407", "content": "妈妈 今年 5 月 1 日 存入 银行 5000 元 钱 ， 定期 2 年 ， 年利率 是 2.25% ， 到期 时 ， 她 从 银行 取回 多少 钱 ？ （ 利息 的 税率 是 20% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "13783", "content": "两地 相距 81 千米 ， 甲 、 乙 两 人 同时 从 两地 骑车 相向 而 行 ， 甲 每 小时 骑 10 千米 ， 两 人 4.5 小时 后 相遇 ． 甲 的 速度 比 乙 快 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9040", "content": "0.05 + (1/25) =", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4443", "content": "同学 们 到 科技馆 参观 ， 他们 排成 人数 同样 多 的 4 行 ， 小 军 排 在 第 2 行 ， 从前 数 是 第 9 人 ， 从 后 数 是 第 11 人 ， 参观 展览 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21564", "content": "一 条 裤子 比 一件 上衣 便宜 25 元 ． 一条 裤子 是 一件 上衣 价格 的 (2/3) ， 一件 上衣 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7485", "content": "果园 里 有 龙眼 4800 千克 ， 每 3 千克 装 一盒 ， 8 盒装 一箱 ， 这些 龙眼 能 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16706", "content": "一 件 衣服 原价 是 650 元 ， 现在 打 0.8 出售 ， 降价 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12485", "content": "已知 减数 是 3200 ， 差 是 360 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18756", "content": "小 明 经过 (2/3) 时 写 了 80 个 毛笔字 ， 平均 每 小时 写 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "959", "content": "计算 ： (3/20) - 0.15 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4429", "content": "操场上 有 学生 144 人 ， 其中 跳远 的 占 总 人数 的 (2/9) ， 打球 的 人数 是 跳远 的 (15/16) ． 打球 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "849", "content": "某 农场 用 拖拉机 耕地 1850 公顷 ， 已经 耕 完 (1/4) ， 剩下 的 用 2 台 拖拉机 5 天 耕 完 ， 平均 每 台 每天 耕地 多少 公顷 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10583", "content": "小 陈 看 一本 180 页 的 书 ， 第一周 看 了 全书 的 40% ， 第 二 周 看 了 全书 的 25% ， 两周 共 看书 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1941", "content": "地球 绕 太阳 一周 约 365 天 ， 比 水星 绕 太阳 一周 所 需 时间 的 5 倍 少 75 天 ． 水星 绕 太阳 一周 要 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11676", "content": "学校 图书馆 有 科技 书 2300 本 ， 占 图书 总量 的 (5/7) ， 图书馆 共有 存 书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "495", "content": "甲乙 两地 相距 540 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 3 小时 行驶 了 180 千米 ， 照 这样 的 速度 ， 这辆 汽车 还 需要 多少 时间 就 能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15731", "content": "国家一级 保护 动物 野生 丹顶鹤 ， 2001 年 全世界 约 有 2000 只 ， 我国 占 其中 的 (1/4) ． 我国 约 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19135", "content": "李老师 从 学校 领 了 一批 练习本 ， 分给 班上 的 38 位 同学 ， 每人 分 4 本 ， 分 到 最后 一个 人 时 ， 发现 差 1 本 ， 这 批 练习本 一共 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14670", "content": "小 红 妈妈 把 1000 元 钱 存入 “ 教育 储蓄 ” （ 不 交 利息税 ） ， 定期 3 年 ， 年利率 为 3.69% ， 到期 可 得到 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1747", "content": "列式 计算 ． 甲 数 是 45 ， 乙 数 比 甲 数多 (2/9) ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8802", "content": "小 任 每天 骑 ． 自行车 去 上班 ， 按 260 米 / 分 的 速度 30 分钟 就 可 ． 以 从 他家 到 单位 ． 他家 离 单位 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19006", "content": "信心 农场 新建 一座 温室 ， 室内 耕地面积 是 364 平方米 ， 全部 栽种 西红柿 ， 一茬 平均 每平方米 收 15 千克 ． 每千克 按 2.6 元 计算 ， 一共 可以 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21975", "content": "比 78 吨 多 135 吨 的 = 多少 吨 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1431", "content": "10.2 - 2.5 的 差 除以 20% 与 2 的 积 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7220", "content": "一 辆 汽车 以 每 小时 60 千米 的 速度 从 甲地 开往 乙地 ， 4 小时 可以 到达 ； 如果 返回 时 每 小时 行驶 80 千米 ， 几小时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3133", "content": "某 工程队 修路 ， 第一周 完成 了 全长 的 32% ， 第 二 周 完成 了 全长 的 43% ， 已知 两周 共 修 了 1800 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10183", "content": "一 辆 旅游车 在 平原 和 山路 分别 行 了 2 小时 和 3 小时 ， 已知 平原 上 行驶 速度 为 60 千米 / 时 ， 山路 上 行驶 速度 为 30 千米 / 时 ， 这 段 路程 共 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1324", "content": "一 个 平行四边形 和 一个 三角形 等 底 等 高 ． 已知 平行四边形 的 面积 是 16 dm ^ 2 ， 三角形 的 面积 = 多少 平方分米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9291", "content": "工程队 修 一段 公路 ， 已经 修 了 全长 的 (4/7) ， 还有 840 米 没有 修 ． 这 段 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6224", "content": "游乐场 的 门票 原来 30 元 一张 ， “ 6 • 一 ” 期间 0.8 优惠 ， 购买 一张 门票 能 省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6079", "content": "某 供热 公司 计划 运进 2000 吨 煤 ， 已 运进 (2/5) ， 还 剩 多少 吨 煤 没有 运 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20463", "content": "某村 建 一座 蔬菜 大棚 ， 棚内 耕地面积 是 200 平方米 ， 全部 栽 黄瓜 ， 平均 每平方米 产 8.5 千克 ， 每千克 按 2.5 元 计算 ， 一共 可 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2584", "content": "小 明 看 一 本书 ， 已经 看 了 全部 页数 的 (1/3) 还 多 16 页 ， 余下 没 看 的 比 已 看过 的 还 多 48 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5766", "content": "一 个数 乘以 9 ， 除以 6 ， 再 加上 12 ， 减去 8 ， 结果 等于 10 ， 这个 数 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1070", "content": "果园 里 有 苹果树 80 棵 ， 是 桃树 棵 数 的 (5/6) ． 果园 里 苹果树 和 桃树 共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13299", "content": "希望 小学 今年 有 毕业生 240 人 ， 比 去年 毕业 的 增加 20% ， 去年 毕业 的 学生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13443", "content": "甲 、 乙 两艘 轮船 同时 从 一个 码头 向 相反 方向 开出 ， 航行 了 5 小时 ， 两 船 相距 225 千米 ， 甲 船 每 小时 行 19.5 千米 ， 乙 船 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4413", "content": "甲 、 乙 两车 分别 人 烟台 和 青岛 出发 ， 甲 的 速度 是 48 千米 / 小时 ， 乙 的 速度 是 52 千米 / 小时 ， 经过 2 小时 相遇 ， 烟台 和 青岛 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17178", "content": "80.8 里面 含有 多少 个 0.8 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "80", "content": "水果 大 卖场 运 来 苹果 185 千克 ， 比 运进 的 梨 少 65 千克 ， 运进 橘子 的 重量 是 梨 的 3 倍 ， 运进 橘子 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19938", "content": "2.24 米 的 (3/8) = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "848", "content": "袋子 里 有 大小 相同 的 黄 球 7 个 ， 红球 3 个 ， 闭上眼睛 从 袋中 任意 摸 一个 球 ， 摸 出 黄 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20869", "content": "利民 超市 运进 50 箱 橙汁 ， 每箱 24 瓶 ， 共 卖出 2400 元 ． 每瓶 橙汁 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17197", "content": "张 军 家 有 240 本书 ， 正好 是 王 丽 家 图书 的 (2/3) ， 而 陈 明 家 的 图书 有 400 本 ， 是 王 丽 家 图书 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12294", "content": "一 辆 汽车 3.5 小时 行 了 210 千米 ， 照 这样 的 速度 行驶 318 千米 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19662", "content": "书店 里 有 《 数学 思维 训练 》 350 本 ， 第一天 卖出 40% ， 第 二 天 卖出 总数 的 (3/7) ， 还 剩下 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6963", "content": "13579 + 35791 + 57913 + 79135 + 91357 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "18971", "content": "张师傅 加工 一批 零件 ． 第一天 完成 了 这 批 零件 的 (1/4) ， 如果 第 二 天 再 加工 15 个 ， 两天 就 完成 这 批 零件 的 50% ． 这 批 零件 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19154", "content": "盛世 佳 和 超市 购进 12 箱 儿童 牙膏 ， 每箱 25 盒 ， 每盒 卖 4 元 钱 ． 这些 儿童 牙膏 一共 可以 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17420", "content": "一 种 合金 中 a 和 b 两种 物质 的 质量 比 是 4 ： 5 ， 那么 a 物质 的 质量 占 这种 合金 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21175", "content": "在 一个 书架上 有 不同 的 数学 参考书 9 本 ， 不同 的 语文 参考书 6 本 ， 不同 的 英语 参考书 3 本 ． 现 从中 取出 两本 不同 学科 的 参考书 ， 有 多少 种 不同 的 取法 ？", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "14102", "content": "一 桶 水 第一次 用 去 全 桶 的 20% ， 第 二 次 用 去 10 千克 ， 第 3 次 用 了 前 两次 的 和 ， 这时 桶 里 还 剩下 4 千克 水 ． 问 这 桶 水 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11597", "content": "比 45 少 20% 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9570", "content": "儿童 画册 有 6 本 ， 科技 书 39.2 元 ， 一共 是 87.9 元 ， 每 本 儿童 画册 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17999", "content": "把 一个 长 10 厘米 、 宽 8 厘米 的 长方形 框架 ， 拉 成 一个 高 为 9 厘米 平行四边形 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1966", "content": "一 个 等腰三角 形 ， 其中 的 两条 边 分别 是 6 厘米 和 15 厘米 ， 这个 三角形 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12812", "content": "利民 运动 商店 购进 一台 跑步机 ， 标价 4250 元 ． 一周 后 打 0.9 仍 没有 卖出 ， 再次 打 0.8 才 卖出 ， 这 台 跑步机 卖出 的 价格 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10685", "content": "对 120 种 食物 是否 含有 维生素甲 、 乙 、 丙 进行 调查 ， 结果 是 ： 含 甲 的 62 种 ， 含 乙 的 90 种 ， 含 丙 的 68 种 ； 含 甲 、 乙 的 48 种 ， 含 甲 、 丙 的 36 种 ， 含 乙 、 丙 的 50 种 ； 含 甲 、 乙 、 丙 的 25 种 ． 问 仅 含 维生素甲 的 有 - - - - - 种 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2389", "content": "爸爸 的 工资 应纳 税款 的 部分 是 480 元 ． 如果 按 5% 税率 计算 ， 爸爸 工资 的 这部分 收入 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22143", "content": "周日 ， 乐乐 一家 开车 从 青岛 市区 去 胶南 郊游 ． 去 时 每 小时 行 60 千米 ， 1.5 小时 到达 ， 返回 时 用 了 1.2 小时 ． 返回 时 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19209", "content": "小 红 家 有 4 口 人 ， 上个月 家庭 用电 共 80 度 ， 每 度 电 的 价钱 是 0.68 元 ， 平均 每人 付 电费 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1485", "content": "一 列 客车 和 一列 货车 同时 从 a 、 b 两地 相向 而 行 ， 6 小时 相遇 ． 相遇 后 客车 又 行 了 4 小时 到达 b 地 ． 这时 货车 还要 行驶 多少 小时 才能 到达 a 地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11571", "content": "“ 6 一 ” 期间 ， 中央 商场 搞 “ 家电 下乡 ” 活动 ， 农民 伯伯 购买 家电 时 可 享受 政府 补贴 13% 的 优惠政策 ． 张 大伯 家 买 了 一台 电冰箱 ， 只 需 付 2784 元 ， 这 台 电冰箱 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3395", "content": "一 群 鸭子 共 960 只 ， 其中 有 580 只 在 水中 ， 其余 的 在 岸上 ， 岸上 有 多少 只 鸭子 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15432", "content": "贝 贝 今年 9 岁 ， 爷爷 的 年龄 加上 5 ， 再 乘以 3 ， 然后 除以 10 ， 再 减去 12 ， 正好 是 贝 贝 的 岁数 ． 请问 爷爷 今年 多少岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18873", "content": "今年 参加 数学 兴趣小组 的 同学 比 去年 增加 了 12% ， 今年 参加 数学 兴趣小组 的 同学 是 去年 的 百分之几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14263", "content": "某 工程队 铺 一条 地下 石油 管道 ， 前 2 天 共铺 了 350 米 ， 剩下 的 850 米 只用 4 天 就 铺 完 了 ． 这个 工程队 平均 每天 铺 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6661", "content": "336 - 64 再 除以 16 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14080", "content": "服装店 的 上衣 每件 68 元 ， 裤子 每 条 57 元 ， “ 5 一 ” 黄金周 一共 卖出 8 套 这样 的 服装 ， 一共 卖 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17220", "content": "0.03 ^ 2 = ．", "knowledge": ["^"], "difficulty": 0.0, "length": 3}
-{"question_id": "13915", "content": "一 个数 增加 它 的 15% 是 4.6 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8676", "content": "10 米 长 的 一块 白布 ， 用 去 了 3.3 米 ． 从 剩下 的 上面 再剪 去 2.85 米 ． 还 剩下 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15967", "content": "比 3.5 的 8 倍 多 2.5 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19239", "content": "小 云 爬 青云山 ， 上 下山 共用 4 小时 ， 如果 他 上山 用 了 2.4 小时 ， 按 原 路 下山 速度 每 小时 7.5 千米 ， 他 上山 的 速度 = 多少 千米 / 时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2555", "content": "a 是 b 的 (1/5) ， c 是 b 的 (1/4) ， a 是 c 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10386", "content": "小 明 看 一 本书 ， 已经 看 了 115 页 ， 剩下 的 每天 看 20 页 ， 15 天 看 完 ． 这 本书 一共 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5242", "content": "打 一部 书稿 ． 第一天 打 了 12 页 ， 第 二 天 打 了 13 页 ． 两天 共 打 了 这部 书稿 的 (5/48) ． 这部 书稿 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22925", "content": "甲 、 乙 两车 同时 从 相距 162 千米 的 两地 出发 ， 相对 而 行 ， 甲 车 每 小时 行驶 60 千米 ， 乙 车 的 速度 是 甲 车 的 (4/5) ． 多少 上 时 后 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15369", "content": "2009 年 芳 芳 9 岁 了 ， 她 的 出生 年份 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12942", "content": "用 一个 自然数 去除 715 和 903 所得 余数 相同 ， 且 商 相差 4 ． 求 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5083", "content": "8.7 与 3.7 的 差 乘 6.32 + 3.68 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2229", "content": "一 批 零件 的 合格率 为 98% ． 如果 合格 的 零件 是 392 个 ， 那么 这 批 零件 一共 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3729", "content": "如果 一个 等腰三角 形 的 两条 边 分别 是 3 厘米 和 7 厘米 ， 这个 三角形 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6932", "content": "甲乙 两 人 同时 从 两地 相向 而 行 ， 甲 骑 自行车 每 小时 行 15 千米 ， 乙 骑 摩托车 每 小时 行 45 千米 ， 甲 在 离 出发 地点 30 千米 处 与 乙 相遇 ． 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2286", "content": "251 - 182 的 差 除 69 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3240", "content": "校园 里 有 松树 20 棵 ， 杨树 比 松树 多 14 棵 ， 杨树 和 松树 一共 有 多少 棵 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18671", "content": "新 建成 的 广州 塔 是 目前 世界 最高 的 电视塔 ， 它 高 610 米 ， 比 北京 的 中央 广播 电视塔 还要 高出 205 米 ， 北京 中央 广播 电视塔 高 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12631", "content": "2 * 3 * 5 * 7 * 11 * 13 = ．", "knowledge": ["*"], "difficulty": 0.4, "length": 11}
-{"question_id": "1773", "content": "一 桶 油 ， 第一次 用 去 (2/5) ， 第 二 次 用 去 (1/3) ， 还 剩 8 千克 ． 这 桶 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21192", "content": "在 中小学生 体质 健康 测试 中 ， 华兴 小学 体质 达标 人数 有 540 人 ， 正好 占 全校 总 人数 的 (3/5) ， 全校 共有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7667", "content": "一 本 故事书 有 193 页 ， 笑笑 已经 看 了 65 页 ， 如果 剩下 的 笑笑 打算 8 天 看 完 ， 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5003", "content": "牧场 养 山羊 和 奶羊 ， 其中 山羊 360 只 ， 是 奶羊 的 3 倍 ． 山羊 和 奶羊 共 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18323", "content": "一 张 书桌 175 元 ， 一把 椅子 58 元 ， 学校 要 买 5 套 桌椅 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22673", "content": "商店 运 来 一批 水果 ， 上午 卖 去 了 180 千克 ， 下午 又 卖 去 了 240 千克 ， 这 一天 共 卖 去 这 批 水果 的 (3/8) ， 这 批 水果 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19312", "content": "修 一条 公路 ， 已经 修 了 全长 的 (3/4) ， 正好 是 30 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22600", "content": "定做 一套 校服 ， 上衣 51 元 ， 裤子 39 元 ． 吴 城 小学 四年级 共有 180 名 学生 ， 给 每人 定做 一套 这样 的 校服 共 需 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3186", "content": "计算 ： 248 + 249 + 250 + 251 + 252 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "12630", "content": "农场 今年 养鸭 5000 只 ， 比 去年 多 养 1000 只 ． 这 两年 共 养鸭 多少 只 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13806", "content": "一 艘 轮船 ， 从 南京 驶往 向阳 渔港 ， 每 小时 行驶 20 千米 ， 10 小时 到达 ； 回来 时 ， 每 小时 行驶 25 千米 ， 几小时 可以 回到 南京 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6014", "content": "一 支 圆珠笔 的 价格 乘 3 ， 再 减去 0.5 元 ， 就 和 一支 钢笔 的 价格 相同 ， 一支 钢笔 的 价格 是 10 元 ， 一支 圆珠笔 的 价格 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2588", "content": "计划 修路 600 米 ， 20 小时 内 完成 ； 实际 3 小时 就 完成 了 20% ． 照 这样 计算 ， 能 在 计划 时间 内 完成 ？ 为什么 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "424", "content": "灰 太 狼 把 一段 木料 锯 成 了 5 段 ， 用 了 16 分钟 ． 照 这样 计算 ， 我 把 这根 木料 锯 成 8 段 ， 共 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7619", "content": "某 糖厂 去年 生产 白糖 400 吨 ， 今年 生产 白糖 480 吨 ， 今年 生产 白糖 比 去年 多几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2632", "content": "电影票 15 元 一张 ， 降价 后 观众 增加 一 倍 ， 收入 增加 (1/5) ， 每张 票价 降价 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3098", "content": "学校 去年 栽 树苗 250 棵 ， 这 批 树苗 的 成活率 是 80% ， 求 这 批 树苗 有 多少 棵 成活 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18900", "content": "六年级 同学 到 垃圾 发电站 去 参观 学习 ， 每辆车 能 坐 58 人 ． 已知 六年级 有 男生 218 人 ， 女生 188 人 ， 需要 几辆 这样 的 客车 ？ （ 用 综合 算式 解答 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "372", "content": "甲 、 乙 两 人 沿着 直径 是 100 米 的 环形 跑道 同时 同 地 背向 而 行 ， 甲 出发 3 分钟 后 首次 与 乙 相遇 ， 首次 相遇 时 乙 走 了 全程 的 40% ， 甲 每分钟 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12622", "content": "社区 学校 计划 每天 节约 18 度 电 ， 现在 每天 比 计划 多 节约 4 度 电 ， 照 这样 计算 ， 一个月 一共 能 节约 多少度 电 ？ （ 一个月 按 22 天 计算 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2545", "content": "学校 买来 6 盒 乒乓球 ， 共 是 30 个 ， 平均 每盒 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13067", "content": "贝 贝 每分钟 打字 250 个 ， 要 打 完 1000 个 字 的 一份 文件 ， 要 打 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4672", "content": "养鱼池 里 有 140 条 红 金鱼 ， 比 黄金 鱼 少 45 条 ， 黄金 鱼 有 多少 条 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16558", "content": "学校 购买 了 一批 数学 作业本 ， 把 它们 分给 低 、 中 、 高 3 个 年级 ， 低年级 分 得 180 本 ， 中年级 分 得 360 本 ， 高年级 分 得 46% ， 这 批 作业本 共有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15109", "content": "小 东 从 家 走 到 学校 要 23 分钟 ， 他 步行 的 速度 大约 是 55 米 / 分 ， 小 东家 离 学校 大约 有 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6579", "content": "某班 8 名 运动员 参加 跳绳 比赛 ， 前 7 名 运动员 平均 每人 跳 125 下 ， 要 使 所有 运动员 平均 每人 跳 的 下 数 达到 128 下 ， 最后 一名 运动员 必须 多少 下 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11944", "content": "赤壁 公园 上午 有 游客 762 人 ， 中午 有 275 人 离去 ， 下午 又 来 了 408 位 游客 ， 这时 公园 内 有 多少 位 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "975", "content": "1 - 0.12 + (1/2) + 0.34 + (1/3) - 0.56 + (1/5) - 0.78 = ．", "knowledge": ["+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "17778", "content": "某 天 ， 如果 1 美元 兑换 6.98 人民币 ． 那么 多少 元 人民币 可兑换 成 200 美元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19920", "content": "一 块 钢材 的 (3/4) 重 300 千克 ， 这块 钢材 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11346", "content": "一 根 电线 长 40 米 ， 先 用 去 它 的 40% ， 再 用 去 (3/4) 米 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16863", "content": "军 军 的 妈妈 今年 32 岁 ， 他 外公 的 年龄 是 妈妈 的 2 倍 ． 军 军 的 妈妈 和 外公 今年 一共 多少岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3415", "content": "人 的 心脏 的 跳动 次数 随着 年龄 的 变化 而 变化 ． 青少年 每 分 约 跳 77 次 ， 婴儿 每 分 跳动 的 次数 比 青少年 多 (4/7) ． 婴儿 每 分 心跳 多少 次 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2755", "content": "定期 一年 的 储蓄 的 年利率 是 2.25% ， 小 刚 把 800 元 压岁钱 存 定期 一年 ， 到期 后 ， 可以 得到 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13157", "content": "一 个 梯形 上 底 和 下 底 的 和 是 15 米 ， 高 3 米 ， 它 的 面积 = 多少 m ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18587", "content": "利 农 化肥厂 6 月份 实际 生产 化肥 300 吨 ， 比 计划 多 生产 60 吨 ， 超过 计划 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9686", "content": "学校 植树节 时 准备 栽 999 棵 树 ， 4 、 5 、 六年级 的 同学 们 已经 栽 了 699 棵 ， 剩下 的 由 四年级 的 6 个 班 完成 ， 平均 每个 班 栽 几棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3989", "content": "第一次 用 去 一根 铁丝 的 (2/5) ， 第 二 次 用 去 这根 铁丝 的 (2/7) ， 还 剩下 这根 铁丝 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4533", "content": "学校 计划 投资 200 万元 建造 活动 大楼 ， 实际 投资 180 万元 ， 实际 投资 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12632", "content": "一 个 果园 共有 果树 480 棵 ， 其中 苹果树 占 17% ， 梨树 占 25% ， 桃树 占 28% ． 其余 的 是 杏树 ， 杏树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9293", "content": "电视机厂 5 月份 计划 生产 电视机 2000 台 ， 结果 多 生产 500 台 ． 超产 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18632", "content": "水 结成 冰 后 ， 体积 增加 10% ． 一块 体积 是 2.2 立方米 的 冰 ， 融化 成 水 后 的 体积 = 多少 立方米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16940", "content": "给 服装 钉扣子 ， 每套 服装 钉 5 颗 ， 钉 完 15 套 后 还 剩 3 颗 ， 一共 买 了 多少 颗 扣子 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14025", "content": "学校 饲养 组 养 白兔 和 黑 兔 共 28 只 ， 其中 白兔 占 (3/7) ． 黑 兔 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18905", "content": "小 明 从 家 到 学校 有 1.16 千米 ， 他 走 了 10 分钟 ， 每分钟 走 0.06 千米 ， 剩下 的 路程 他 要 8 分钟 走 完 ， 剩下 的 路程 他 每分钟 走 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9989", "content": "甲 、 乙 两地 间 铁路 长 693 千米 ． 一列 客车 和 一列 货车 分别 从 两地 同时 在 上午 9 时 开出 ， 相对 而 行 ． 客车 每 小时 行 70 千米 ， 货车 每 小时 行 56 千米 ． 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5724", "content": "玲玲 和 冬冬 分别 住 在 学校 的 东西 方向 ， 两家 相距 800 米 ． 放学 时 两 人 同时 从 学校 出发 ， 经过 4 分钟 ， 两 人 同时 到 家 ， 冬冬 每分钟 走 80 米 ， 玲玲 每分钟 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12183", "content": "某 小学 植 杨树 和 柳树 共 756 棵 ， 种 的 杨树 和 柳树 的 棵 数 的 比 是 4 ： 5 ， 种 杨树 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1869", "content": "某 商品 按 定价 出售 ， 每个 可 获 利润 45 元 ． 如果 按 定价 的 70% 出售 10 个 ， 与 按 定价 每个 减价 25 元 出售 12 个 所 获得 的 利润 一样 多 ， 那么 这种 商品 每个 定价 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7753", "content": "星星 玩具厂 计划 生产 一批 玩具 猫 给 百 安 商场 ， 每天 生产 500 件 ， 20 天 可 完成 任务 ． 后来 根据 商场 要求 提前 4 天 完成 ． 实际 平均 每天 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "222", "content": "实验 小学 美术组 人数 是 科技 组 的 (5/6) ， 科技 组 人数 是 体育组 的 (4/3) ． 美术组 有 40 人 ， 体育组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4881", "content": "一 个数 的 2 倍 + 12 的 75% ， 等于 14 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15639", "content": "五年级 同学 收集 树种 56 千克 ， 六年级 收集 的 比 五年级 多 (4/7) ， 六年级 比 五年级 多 收集 树种 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18918", "content": "一 个 平行四边形 的 面积 是 13.5 平方厘米 ， 高 是 1.5 厘米 ， 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16159", "content": "李 阿姨 是 一名 导游 ， 今天 她 接待 了 一个 东南亚 旅游团 ， 一共 有 280 人 ， 安排 的 旅游车 每辆 限 乘客 40 人 ， 每辆车 的 租金 为 300 元 ． 李 阿姨 需要 付 租金 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "203", "content": "18 位 同学 合影留念 ， 拍照 需要 26.4 元 ， 可以 有 3 张 照片 ， 如果 现在 每人 要 1 张 照片 ， 就 需要 加印 ， 加印 一张 照片 要 0.64 元 ， 平均 每人 应付 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5799", "content": "小林 有 36 枚 邮票 ， 小 新 的 邮票 是 小林 的 (5/6) ， 小 明 的 邮票 是 小 新 的 (4/3) ， 小 明 有 多少 枚 邮票 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10026", "content": "同学 们 进行 体操 表演 ， 每排 10 人 ， 有 15 排 ， 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6994", "content": "郧县 服装厂 接到 生产 1200 件 衬衫 的 任务 ， 前 3 天 完成 了 40% ， 照 这样 计算 ， 完成 生产 任务 还要 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16885", "content": "某 学校 有 学生 1520 人 ， 每个 班 40 名 学生 ， 每个 班级 一天 上 6 节 课 ， 平均 每个 教师 一天 教 3 节 课 ， 那么 这 所 学校 至少 需要 配备 多少 名 教师 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22355", "content": "在 一个 周长 是 480 米 的 操场 周围 植树 ， 每隔 5 米 栽 一棵 ， 一共 要 栽 多少 棵 树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16596", "content": "一 大包 味精 比 一小包 的 4 倍 多 10 克 ， 一小包 味精 30 克 ， 一 大包 味精 = 多少 克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22639", "content": "一 个 平行四边形 的 底 长 (2/7) 米 ， 高 3 米 ， 它 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3332", "content": "一 种 冰箱 原价 是 2250 元 ， “ 5 一 ” 期间 0.7 出售 ， 现在 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19684", "content": "服装 商店 用 1800 元 进来 一批 衬衫 ， 按 20% 的 利润 定价 ， 能 获 利润 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14598", "content": "某 小学 6 （ 1 ） 班 有 女生 21 人 ， 是 男生 人数 的 (7/8) ， 这个 班 有 多少 名 学生 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12680", "content": "我 县 努力 创建 “ 绿色 工贸 城市 ” ， 在 宣传 活动 中 ， 我校 5 、 六年级 参加 活动 的 人数 比 是 3 ： 4 ， 六年级 的 120 人 ， 五年级 有 多少 人 参加 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6190", "content": "一 个 儿童 体内 所 含 的 水分 有 28 千克 ， 占 体重 的 (4/5) ． 这个 儿童 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5522", "content": "二年级 同学 去 看 电影 ， 买 了 82 张 票 ， 后来 退 了 9 张 ． 二年级 有 多少 同学 看 了 电影 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6576", "content": "一 列 火车 每 小时 行使 126 千米 ， 一辆 汽车 每 小时 行使 42 千米 ， 火车 的 速度 是 汽车 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13500", "content": "0.25 / 3.75 的 商 减去 1.8 * 4.5 的 积 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11249", "content": "果园 今年 种 果树 200 棵 ， 成活率 是 98% ． 死 了 多少 棵 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14679", "content": "一 辆 汽车 从 甲地 出发 ， 第一天 走 了 全程 的 (3/8) ， 第 二 天 走 了 余下 的 (2/3) ， 第 3 天 走 了 250 千米 到达 乙地 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22136", "content": "学校 买 8 个 篮球 和 3 个 足球 ， 每个 篮球 52.4 元 ， 每个 足球 45.1 元 ， 一共 要 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8469", "content": "某 超市 从 厂家 以 每件 21 元 的 价格 购进 一批 商品 ， 该 超市 可以 自行 定价 ， 但 物价局 限定 每件 商品 加价 不能 超过 进价 的 20% ， 则 这 批 商品 的 售价 不能 超过 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5143", "content": "大型 体操 表演 ， 一共 排 了 25 排 ， 每排 36 人 ． 每 50 人 穿 同 一种 颜色 的 衣服 ， 一共 要 准备 多少 种 不同 颜色 的 衣服 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11565", "content": "木工 组 修 课桌 ， 已经 修好 了 35 张 ， 还要 再 修 16 张 ， 他们 一共 要 修 多少 张 课桌 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "961", "content": "一 条 水渠 已修 了 17 千米 ， 还 剩下 13 千米 没有 修 ， 未 修 的 占 全长 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23018", "content": "六年级 同学 进行 体育 达标 测试 ， 在 第一次 达标 测试 中 (4/7) 的 同学 达到 了 标准 ， 经 一个月 锻炼 后 ， 没 达标 的 同学 又 参加 了 第 二 次 达标 测试 ， 结果 参加 人数 的 (5/6) 都 达到 了 标准 ， 只 余下 8 名 同学 没有 达标 ． 请 算 一 算 ， 六年级 共有 多少 名 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20785", "content": "一 个 西瓜 平均 分成 5 块 ， 玲玲 吃 了 3 块 ， 强强 吃 了 2 块 ， 两 人 一共 吃 了 西瓜 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19004", "content": "商店 运 来 960 千克 苹果 ， 比 运 来 的 梨 重 (1/4) ， 运 来 的 梨 多少 千克 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19535", "content": "把 10.6 缩小 到 它 的 (1/100) ， 再 扩大 到 它 的 10 倍 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6141", "content": "两 城市 相距 675 千米 ， 甲 、 乙 两 客车 分别 从 两 城市 同时 相对 开出 ， 经过 7.5 小时 相遇 ． 已知 甲 车 每 小时 行驶 42 千米 ， 求 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6257", "content": "学校 图书馆 有 科技 书 358 本 ， 比 故事书 少 274 本 ． 故事书 有 多少 本 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5202", "content": "小 云 有 漫画书 40 本 ， 故事书 的 本 数 比 漫画书 少 (3/5) ． 小 云 的 故事书 比 漫画书 少 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21394", "content": "王师傅 要 生产 400 个 零件 ， 已经 完成 了 总数 的 95% ， 为了 超产 20% ， 还 需要 加工 多少 个 零件 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6045", "content": "一 件 西装 标价 800 元 ， 现 0.75 销售 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6460", "content": "刘 奶奶 从 银行 购得 年率 为 3.7% 的 3 年期 国债 40000 元 ， 约定 每年 取 一次 利息 ， 每年 应得 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8285", "content": "新华书店 新 运进 一批 文艺 书 ， 第一天 卖出 138 本 ， 第 二 天 比 第一天 少 卖出 (1/6) ． 两天 一共 卖出 多少 本 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1859", "content": "王 阿姨 带 100 元 钱 去 买菜 ， 买 荤菜 用 去 28.7 元 ， 买 素菜 比 荤菜 少 用 去 6.3 元 ． 买 两样 菜 一 共用 去 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4075", "content": "沿着 家里 客厅 的 长 边 ， 我 从 一头 走 到 另一头 ， 大约 要 走 9 步 ． 我 的 1 步 大约 长 4 分 米 ， 家里 客厅 大约 长 多少 分 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17599", "content": "一 列 火车 从 甲 站 开往 乙 站 ， 4.5 小时 行 全程 的 (5/6) ， 照 这样 计算 ， 还要 几小时 可以 到达 乙 站 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6751", "content": "汽车 从 甲地 开往 乙地 ， 当 行 了 全程 的 (6/11) 时 ， 离 乙地 还有 75 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10460", "content": "4 / 5000 - 4708 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10894", "content": "足球 有 18 只 ， 篮球 的 数量 是 足球 的 3 倍 多 13 ， 篮球 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22412", "content": "大楼 高 29.2 米 ， 一楼 准备 开 商店 ， 层高 4 米 ， 上面 9 层 是 住宅 ． 住宅 每 层高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10671", "content": "修路 队 修 一条 6 千米 的 公路 ， 第一周 修 了 (3/4) km ， 第 二 周 修 了 (5/6) km ， 还 剩下 多少 千米 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13586", "content": "某 工厂 计划 投资 200 万元 ， 实际 节约 10 万元 ． 实际 投资 是 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17135", "content": "一 本书 640 页 ， 3 天 看 了 它 的 (3/8) ， 照 这样 的 速度 还要 几天 才能 看 完 这 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15341", "content": "把 160 千克 水泥 装袋 ， 装 好 6 袋 后 还 剩 10 千克 ， 平均 每 袋装 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8501", "content": "四年级 8 个 班 的 同学 要 去 植树 ， 每班 有 5 个 组 ， 共 植树 880 棵 树 ， 每个 组 植树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5477", "content": "把 一根 小 棒 锯 成 相等 的 ， 共 锯 了 4 次 ， 每 段 是 这根 小 棒 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14705", "content": "一 根 钢管 长 (7/6) 米 ， 比 另 一根 短 (1/3) 米 ， 这 两根 钢管 共 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8430", "content": "甲乙 两 数 的 比 是 2 ： 5 ， 乙 数 与 甲 数 的 差 是 10.5 ， 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7271", "content": "修 一条 公路 ， 第一天 修 了 全长 的 40% ， 第 二 天 修 了 全长 的 37.5% ， 还 剩 180 米 没有 修 ， 这 条 公路 共 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2009", "content": "一 个数 的 (3/5) 比 3.6 多 12 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22077", "content": "六年级 有 120 名 同学 ， 其中 75% 的 同学 达到 了 国家 体育锻炼 标准 ， 还有 多少 名 同学 没有 达到 国家 体育锻炼 标准 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2184", "content": "一 条 毛毛虫 由 幼虫 长成 成虫 ， 每天 长大 一倍 ， 30 天 能 长 到 20 厘米 ， 长 到 5 厘米 时 要 用 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16322", "content": "在 一段 长 42 米 的 小路 两边 从头到尾 共 栽 了 14 棵 树 ， 每 两棵 之间 相距 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18749", "content": "某 工厂 女职工 有 128 人 ， 比 男 职工 人数 多 (1/7) ． 该厂 有 男 职工 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12306", "content": "一 桶 油 ， 如果 倒 出 3.2 千克 ， 还 剩 (2/3) ， 如果 要 剩下 (3/4) ， 应 倒 出 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12702", "content": "五年级 师生 共 350 人 到 美景 园 秋游 ， 公交公司 安排 大客车 和 小客车 各 5 辆 ， 每辆 大客车 可以 乘坐 40 人 ， 每辆 小客车 可以 乘坐 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6515", "content": "元旦 期间 ， 甲 店 的 营业额 是 300 万元 ， 甲 店 的 营业额 比 乙 店 少 (1/5) ． 乙 店 的 营业额 = 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6788", "content": "同学 们 收集 树种 ． 五年级 收集 了 30 千克 ， 比 六年级 收集 的 少 (2/7) ， 六年级 收集 了 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9098", "content": "请 列 综合 算式 计算 ． (4/5) 的 (2/3) - 0.75 / (1/5) 的 商 ， 结果 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4810", "content": "一 台 液晶电视 ， 打 0.95 后 以 3800 元 卖出 ， 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15857", "content": "某市 前年 有 电话 用户 20 万个 ， 去年 比 前年 增加 60% ， 比 今年 已有 的 电话 用户 少 20% ． 今年 已有 电话 用户 多少 万个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7922", "content": "学校 门口 的 文具店 新 进 了 一批 文具 ， 其中 钢笔 有 50 枝 ， 签字笔 比 钢笔 的 3 倍 还 多 20 枝 ， 钢笔 和 签字笔 一共 有 多少 枝 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "847", "content": "甲 、 乙 两地 相距 l56 千米 ， 一辆 轿车 行驶 全程 的 (3/8) 用 了 (2/3) 小时 ， 按 这样 的 速度 计算 ， 轿车 行 完全 程 需 多少 时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8169", "content": "明德 小学 有 6 个 年级 ， 每个 年级 5 个 班 ， 按 每个 班 有 52 个 学生 计算 ， 这 所 学校 一共 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5324", "content": "一 根 钢条 长 (5/8) 米 ， 第一次 用 去 (2/7) 米 ， 第 二 次 用 去 一些 后 还 剩 全长 的 (1/4) ， 还 剩 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "285", "content": "一 个数 的 4 倍 是 20.8 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12811", "content": "公园 里 有 柳树 160 棵 ， 是 杨树 的 (8/5) ， 杨树 棵 数 又 是 槐树 的 (4/5) ． 槐树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8057", "content": "一 个 长方体 的 长 是 35 厘米 ， 宽 是 长 的 (4/5) ， 高 是 宽 的 (3/4) ． 这个 长方体 的 体积 = 多少 立方厘米 ？", "knowledge": ["*"], "difficulty": 0.4, "length": 11}
-{"question_id": "22439", "content": "在 笔直 的 跑道 一边 插 着 46 面 彩旗 ， 间隔 为 2 米 ． 现在 要 改为 插 31 面 彩旗 ， 两端 彩旗 位置 不变 ， 这时 间隔 = 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11312", "content": "计算 ： 64.87 * (2/15) / 1996 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3164", "content": "一 台 碾 石机 (3/4) 小时 可以 碾 石 (15/7) 吨 ， 照 这样 计算 ， 碾 1 吨 石 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14304", "content": "水果店 要 运 90 箱 桔子 ， 运 了 7 次 ， 每次 运 9 箱 ， 还有 多少 箱 没有 运 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13532", "content": "修路 队 第一周 修路 (2/5) 千米 ， 第 二 周 修路 (11/35) 千米 ， 两周 正好 修 了 全场 的 (2/7) ， 这 条 路 长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11801", "content": "一 种 压路机 的 前轮 是 圆柱形 ， 轮 宽 为 1.8 米 ， 直径 是 1 米 ， 前轮 滚动 一周 ， 压路 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10906", "content": "王 叔叔 从 银行借款 8000 元 ， 定期 3 年 ， 年利率 4.54% ， 到期 时 王 叔叔 还 银行 多少 利息 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18899", "content": "新兴 小学 168 名 学生 分 4 批 去 参观 科技展 ， 平均 每批 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16751", "content": "从 30 里 减去 48 的 (1/2) ， 所得 的 差 去除 3 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1099", "content": "小林 家养 了 28 只 鸡 ， 小 东家 养鸡 的 只 数 是 小林 家 的 4 倍 ． 小林 和 小 东家 一共 养 了 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18441", "content": "光明 小学 共有 学生 950 人 ， 星期一 缺席 2% ， 这 一天 出勤 了 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15756", "content": "一 桶 油 总共 有 30 千克 ， 卖 了 多少 千克 ， 还 剩下 (2/3) ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21140", "content": "某 商店 批发 了 一批 苹果 ， 批发价 每千克 1.20 元 ， 如果 不计 损耗 ， 商店 要 想 实现 25% 的 利润 ， 零售价 应 定为 每千克 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10072", "content": "班上 有 50 名 学生 ， 将 书 分给 大家 ， 至少 要 拿 多少 本 ， 才能 保证 至少 有 一个 学生 能 得到 两本 或 两本 以上 的 书 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10953", "content": "(1/15) + (4/5) 与 (2/3) 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13032", "content": "24.8 与 7.2 的 和 乘 0.5 ， 所得 的 积 去除 3.2 ， 商 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17794", "content": "某 乡 修 一条 水渠 ， 第一个 月 修 了 全长 的 45% ， 第 二 个 月 修 了 全长 的 (7/20) ， 还 剩 600 米 没有 修 ， 这 条 水渠 全长 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11692", "content": "小 兰 妈妈 把 1000 元 钱 存入 “ 教育 储蓄 ” （ 假如 免交 利息税 ） ， 定期 5 年 ， 年利率 为 3.84% ， 到期 可 得到 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14724", "content": "电视机厂 今年 生产 电视机 36000 台 ， 比 去年 少 生产 (1/4) ， 去年 生产 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14656", "content": "一 种 耳机 原来 一副 80 元 ， 现在 按 原价 的 (4/5) 销售 ， 现在 每 副 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11661", "content": "修 一条 长 208 米 的 管道 ， 前 5 天 一共 修 52 米 ， 照 这样 计算 ， 修 完 这 条 管道 要 用 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15518", "content": "铺 一条 公路 ， 甲 工程队 每天 铺设 (2/5) 千米 ， 乙 队 每天 铺设 的 是 甲队 的 (2/3) ， 丙 队 每天 铺设 的 是 乙 队 的 (3/4) ， 丙 队 每天 铺设 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20726", "content": "海豚 每 小时 可以 游 70 千米 ， 比 蓝鲸 的 速度 快 (1/6) ． 蓝鲸 每 小时 可以 游 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19782", "content": "小 丽 和 爸爸 相差 25 岁 ， 爸爸 今年 40 岁 ． 小 丽 今年 多少岁 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19339", "content": "甲 数 是 10.9 ， 比 乙 数 少 1.15 ， 甲 、 乙 两 数 的 和 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18667", "content": "多少 吨 比 (2/7) 吨 的 (3/4) 少 (1/7) 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11313", "content": "一 个 平行四边形 的 底 是 4.2 厘米 ， 高 是 3 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16534", "content": "把 (3/4) l 橙汁 分装 在 容量 是 (1/4) l 的 小瓶 里 ， 可以 装 多少 瓶 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5838", "content": "[ 26 * （ 6 - 2.5 ） / 0.5 - 25 ] * 0.2 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4214", "content": "玉米 的 发芽率 是 95% ， 在 1 平方米 的 田地 上 要 保障 有 38 棵 玉米面 ， 至少 要 播种 多少 粒 玉米种子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8645", "content": "商店 运 来 一批 酸奶 ， 卖出 32 件 还 剩 28 件 ． 商店 运 来 多少 件 酸奶 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14309", "content": "学校 图书室 有 文艺 书 120 本 ． 科技 书 的 本 数 是 文艺 书本 数 的 (3/4) ， 又 是 故事 书本 数 的 (1/3) ， 故事书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22273", "content": "李 丽 和 王 敏 同时 做 纸鹤 ， 李 丽 每 小时 做 12 只 ， 王 敏 每 小时 做 14 只 ， 做 了 3 小时 ， 两个 人 一共 做 了 多少 只 纸鹤 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7157", "content": "甲 、 乙 两车 同时 从 两地 相对 开出 ， 6 小时 相遇 ． 相遇 时 甲 车 比 乙 车 多行 60 千米 ． 已知 甲乙 两车 的 速度 比 是 11 ： 9 ， 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.9, "length": 21}
-{"question_id": "19526", "content": "小 华 看 一本 100 页 的 小说 ， 第一天 看 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/4) ， 第 3 天 应从 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12712", "content": "一 个数 除以 12 商 6 余 4 ， 那么 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7808", "content": "一 艘 轮船 从 上海 开往 汉口 ， 已经 航行 了 全程 的 (3/5) ， 离 汉口 还有 450 千米 ， 上海 到 汉口 的 水路 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3788", "content": "一 共有 360 千克 花生 ， 每 袋装 (2/5) 千克 ． 现在 已 装完 了 (3/4) ． 已经 装完 了 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10965", "content": "工厂 为 抗震 抢险 赶制 756 件 抢险 工具 ． 原 计划 每人每天 做 6 件 ， 派 18 个人 来 完成 ， 为 加快进度 ， 又 增加 了 3 人 ， 可 提前 几天 完成 任务 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "10224", "content": "老师 把 笔记本 平均 分给 小 红 和 小 晶 ， 小 晶 给 小 红 40 本 后 ， 小 红 的 笔记本 就是 小 晶 的 2 倍 ， 她们 原来 分 到 多少 本 笔记本 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19072", "content": "有 一筐 苹果 ， 卖出 (3/4) 后 ， 又 卖出 4 千克 ， 这时 还 剩 16 千克 ， 这 筐 苹果 原有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17567", "content": "一 辆 汽车 ， 前 3 小时 共 行 192 千米 ， 后 2 小时 每 小时 行 58 千米 ， 这辆 汽车 的 平均速度 = 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16150", "content": "宁海县 去年 实际 造林 比 原 计划 增加 (1/5) ， 实际 造林 600 公顷 ， 原 计划 造林 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21797", "content": "元旦 期间 ， 某 商场 进 了 一批 成本价 为 50 元 的 书包 ， 计划 盈利率 达到 80% ， 应 标价 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21378", "content": "学校 厨房 运回 180 千克 柴油 ， 已经 烧 了 (5/6) ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3981", "content": "7.5 与 6.2 的 和 乘 2.3 ， 再 减去 27.46 ， 差 = ？ 列出 式子 = ， 差 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6923", "content": "比 25 的 30 倍 少 20 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11840", "content": "6 年 一班 男女生 人数 的 比 是 4 ： 5 ， 已知 男生 有 20 人 ， 女生 有 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4116", "content": "白兔 有 36 只 ， 比 灰 兔 少 20% ． 灰 兔 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4317", "content": "小 红 从 家 到 外婆家 要 走 558 米 ， 她 用 同样 的 速度 从 外婆家 到 小 芳 家 走 了 248 米 ， 结果 比 从 家 到 外婆家 少 用 了 5 分钟 ， 她 平均 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14721", "content": "学校 买来 89 个 球 ， 其中 25 个 是 篮球 ， 37 个 是 排球 ， 剩下 的 是 皮球 ． 皮球 有 多少 个 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4076", "content": "商店 运 来 60 箱 水果 ， 卖 了 42 箱 ， 剩下 的 要 在 3 天 卖完 ， 平均 每天 要 卖 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17219", "content": "8 名 工人 7 天 共 做 2632 个 零件 ， 平均 每 名 工人 每天 做 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5596", "content": "养鸡场 有 肉鸡 和 蛋鸡 共 4500 只 ， 其中 肉鸡 只 数 占 (1/3) ， 后来 又 买 回 一批 小 肉鸡 ， 这时 肉鸡 只 数 相当于 总 只 数 的 40% ， 此时 这家 养鸡场 共 养鸡 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4349", "content": "加工 一批 零件 ， 原 计划 15 天 做 完 ， 如果 每天 做 300 个 ， 则 提前 3 天 做 完 ， 则 原来 每天 做 多少 个 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7420", "content": "我们 中华人民共和国 国旗 的 宽 是 长 的 (2/3) ， 如果 国旗 的 宽 为 80 厘米 ， 那么 它 的 面积 = 多少 平方厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17663", "content": "甲 、 乙 两辆 汽车 分别 从 南京 和 徐州 同时 出发 ， 相向 而 行 ， 甲 车 每 小时 行 65 千米 ， 乙 车 每 小时 行 67 千米 ， 2 小时 后 两车 相距 132 千米 ， 徐州 和 南京 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13060", "content": "有 一批 布 做 儿童服装 ， 每套 用布 1.5 米 ， 可 做 200 套 ， 如果 改 做成 人 服装 ， 每套 用布 2.5 米 ， 要 少 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16845", "content": "东阳 区 公开 招聘 小学教师 ， 报考 语文 的 都 是 有 360 人 ， 报考 数学 的 教师 有 270 人 ． 现 决定 每 30 人 编 一个 考 室 ， 报考 数学 的 比 报考 语文 的 少 几个 考 室 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5491", "content": "18 吨 的 (2/3) = 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4229", "content": "两个 因数 的 积 是 3.6 ， 如果 一个 因数 扩大 2 倍 ， 另 一个 因数 扩大 10 倍 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4863", "content": "小 明 计划 看 一本 厚 378 页 的 书 ． 前 7 天 平均 每天 看 24 页 ， 以后 平均 每天 多 看 11 页 ， 余下 的 书 还要 看 多少 天 才能 看 完 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14924", "content": "一 本 故事书 有 163 页 ， 第一天 看 了 56 页 ， 第 二 天 看 了 43 页 ， 第 3 天 应从 多少 页 看 起 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12959", "content": "一 根 电线 长 20 米 ， 用 去 它 的 (1/2) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3778", "content": "希望 小学 上个月 用电 3000 度 ， 这个 月 比 上个月 节约 (1/10) ， 如果 每 度 电 0.65 元 ， 这个 月 应付 电费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7465", "content": "用 一张 边长 是 10 分 米 的 正方形 纸板 ， 卷 成 一个 最大 的 纸筒 ． 纸筒 的 侧 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5926", "content": "一 座 大桥 长 2800 米 ， 一列 火车 通过 大桥 时 每分钟 行 800 米 ， 从 车头 开 上 桥 到 车尾 离开 桥 共用 4 分 ． 这 列 火车 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22399", "content": "学校 用 2400 元 钱 买 了 8 箱 毛巾 ， 每箱 25 条 ， 每 条 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7802", "content": "修路 队 修 一条 路 ， 第一天 修 了 800 米 ， 第 二 天 上午 修 的 比 第一天 少 200 米 ， 下午 修 了 400 米 ， 两天 一共 修 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3044", "content": "东升 化肥厂 原 计划 每天 生产 150 吨 化肥 ， 30 天 完成 ， 如果 提前 5 天 ， 每天 要 生产 多少 吨 化肥 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7517", "content": "杭州市委 市政府 为 积极 履行 公共财政 职能 ， 拉动 内需 ， 决定 发放 消费 券 ， 消费 券 购买 商品 按照 面值 享受 5% 的 优惠 （ 即 100 元 消费 券 可 当 105 元 使用 ） ， 小 明 家 共有 1800 元 的 消费 券 ， 他家 实际 可用 这些 消费 券 买 到 多少 元 钱 的 商品 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9357", "content": "□ / 8 = 25 … 6 ， □ 里 应该 填 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10639", "content": "一 本 故事书 ， 小 玲 第一天 读 了 全书 的 (1/5) ， 还 剩 48 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21410", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 37.5% ， 正好 行 了 81 千米 ． 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8544", "content": "学校 图书室 有 文学 类书 320 本 ， 自然科学 类书 数量 的 (4/9) 相当于 文学 类书 数量 的 (5/8) ． 学校 图书室 有 自然科学 类书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9032", "content": "商店 有 苹果 140 千克 ， 梨子 是 苹果 的 2 倍 ， 是 葡萄 的 4 倍 ， 有 葡萄 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10660", "content": "修 一段 公路 ， 平均 每天 修 18.5 千米 ， 修 15 天 后 还 剩 9.5 千米 ， 这 段 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6778", "content": "世界 第一 大河 是 南美洲 的 亚马逊河 ， 全长 6480 千米 ． 我国 的 长江 是 世界 第 3 大河 ， 全长 比 亚马逊河 短 (1/36) ． 长江 全长 为 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14277", "content": "有 一批 水果 ， 卖出 原来 的 (2/5) 以后 ， 又 运 来 1200 千克 ， 这时 的 水果 恰好 是 原来 的 (2/3) ． 你 知道 卖出 了 多少 水果 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5442", "content": "张师傅 加工 一批 机器 零件 ， 第一天 加工 了 50 个 ， 第 二 天 又 加工 了 这 批 零件 的 25% ， 这时 已 加工 的 个数 与 未加工 个数 的 比 是 1 ： 2 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19607", "content": "3 件 上衣 和 4 条 裙子 ， 共有 多少 种 不同 的 搭配 穿 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13536", "content": "一 个数 除以 6 ， 商 80 余 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19204", "content": "小 军 的 体重 是 36 千克 ， 比 小 红 轻 了 0.4 千克 ， 他们 两个 的 体重 一共 = 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8001", "content": "甲 数 是 415 ， 比 乙 数 少 20% ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12535", "content": "有 36 朵 红花 ， 平均 分给 4 个 小朋友 ， 每个 小朋友 分 得 多少 朵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7361", "content": "某 小学 装备 一间 音乐室 投资 了 4 万元 ， 比 原 计划 节省 (1/8) ， 原 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8686", "content": "小 红 的 妈妈 将 5000 元 钱 存入 银行 ， 存期 3 年 ， 年利率 是 2.43% （ 要 缴纳 5% 的 利息税 ） ． 到期 后 小 红 的 妈妈 可以 从 银行 中 取回 本息 多少 元 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "10949", "content": "育才 小学 今年 拥有 电脑 150 台 ， 比 去年 增加 了 75 台 ， 今年 比 去年 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20409", "content": "一 根 木棒 ， 如果 锯 成 7 段 要 用 18 分钟 ， 那么 锯 成 100 段 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "146", "content": "一 个 长方体 水箱 ， 长 为 8 分 米 ， 宽 为 6 分 米 ， 高 为 5 分 米 ， 装 水 高 4 分 米 ， 现在 把 一块 长 3 分 米 ， 宽 2 分 米 的 长方体 铁块 浸没 在 水箱 中 ， 这时 水面 高 4.2 分 米 ． 求 这个 铁块 的 高 = 多少 分 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2119", "content": "植树节 学校 组织 栽树 活动 ， 二年级 同学 把 30 棵 树 平均 栽 成 了 5 行 ， 每行 栽 了 几棵 树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16434", "content": "爸爸 今年 38 岁 ， 比 小 蔚 年龄 的 4 倍 还 大 2 岁 ． 小 蔚 今年 几岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21143", "content": "某市 拟建 一个 长方体 形状 的 体育馆 ， 预备 修建 长 60 米 、 宽 50 米 、 高 25 米 ． 体育馆 占 空间 有 多 大 ？ （ 忽略 墙体 厚度 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6378", "content": "一 个 长方形 菜地 ， 面积 是 84 平方米 ， 它 的 宽 是 7 米 ， 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6697", "content": "水果 店里 卖出 的 梨子 的 重量 是 苹果 的 (3/5) ， 梨子 比 苹果 少卖 30 千克 ． 梨子 卖 了 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22697", "content": "144 与 36 的 积 ， 比 它们 的 商 大 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18738", "content": "某 化工厂 采用 新 技术 后 ， 每天 用 原料 18 吨 ， 这样 原来 6 天 用 的 原料 ， 现在 可以 用 10 天 ， 这个 厂 现在 比 过去 每天 节约 多少 吨 原料 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1769", "content": "学校 购回 一批 图书 ， 发给 三年级 4 个 班 ， 每班 52 本 ， 剩下 156 本 发给 一年级 ， 学校 共 购回 图书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "68", "content": "常德市 的 出租车 起步价 是 5 元 （ 限定 4 千米 内 ） ， 每 超过 1 千米 要 多付 1.5 元 ． 星期天 小 明 一家人 坐 出租车 从 家 出发 到 爷爷奶奶 家 看望 他们 ． 下车时 ， 爸爸 付 了 29 元 钱 ， 那么 请 你 算 一 算 ， 小 明 家 到 爷爷奶奶 家 有 多 远 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1809", "content": "水果店 运 来 苹果 38 箱 ， 香蕉 22 箱 ． 两种 水果 每箱 都 重 15 千克 ， 运 来 的 苹果 比 香蕉 重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12685", "content": "一 根 12 米 长 的 铁丝 ， 用 去 它 的 (3/4) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20614", "content": "车站 有 一批 货物 ， 第一天 运走 总数 的 60% ， 第 二 天 运走 了 50 吨 ， 还 剩 (7/40) 没有 运走 ， 这 批 货物 一共 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10492", "content": "小 东 把 压岁钱 500 元 存入 银行 ， 定期 一年 ． 如果 年利率 按 2.25% 计算 ， 到期 时 小 东 可 从 银行 取回 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11990", "content": "112 * 118 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6723", "content": "720 + 15 与 14 的 积 ， 和 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19146", "content": "一 张 课桌 48 元 ， 椅子 的 价钱 是 课桌 的 (5/8) ， 一套 课桌椅 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3370", "content": "甲 、 乙 两 人 有 人民币 若干 元 ， 其中 甲 占 60% ， 若 乙 给 甲 12 元 后 ， 乙 余下 的 钱 比 总数 的 25% 少 3 元 ， 甲 、 乙 两 人 共有 人民币 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8653", "content": "一 个 正方形 的 长 是 9 厘米 ， 宽比 长短 3 厘米 ． 长方形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15352", "content": "一 杯 果汁 重 3.5 千克 ， 第一次 喝 了 (1/3) ， 第 二 次 喝 了 余下 的 (1/5) ， 然后 加满 牛奶 ． 第 3 次 喝 了 (1/2) ， 第 4 次 喝 了 余下 的 (1/4) ， 这时 杯子 里 剩下 的 果汁 重 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "230", "content": "大庆 路上 每隔 40 米 就 有 一盏 路灯 ， 吴 婷 从 某 一盏 路灯 开始 沿 大庆路 出发 ， 她 走 了 360 米 以后 停 在 一盏 路灯 下 ， 她 停 在 第 多少 盏 路灯 下 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2804", "content": "把 25 克 盐 放入 100 克 水中 ， 盐 占 盐水 的 多少 % ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15549", "content": "军 军 去年 体重 30 千克 ， 今年 增加 到 36 千克 ， 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5935", "content": "张 阿姨 被 评为 “ 十 佳 青年 ” 获得 奖金 5000 元 ， 按规定 张 阿姨 应 按 5% 的 税率 缴纳 个人所得税 ， 她 实际 获得 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15535", "content": "某人 上山 去 游玩 ， 上山 用 了 120 分钟 ， 然后 按 原 路 下山 返回 ， 已知 下山 速度 比 上山 速度 提高 了 75% ， 下山 要 用 多少 分钟 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1395", "content": "一 本书 ， 小 明 计划 每天 看 (2/7) ， 这 本书 计划 多少 看 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5228", "content": "书店 昨天 进 了 一批 书 ， 今天上午 卖出 了 这 批 书 的 40% ， 下午 卖出 了 这 批 书 的 35% ， 一天 共 卖 了 750 册 ， 这 批 书 共有 多少 册 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16306", "content": "陈 叔叔 每月 工资 是 4800 元 ， 按规定 ， 3000 元 后 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 陈 叔叔 应 缴纳 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21477", "content": "一 个数 减去 7.31 等于 14.29 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18451", "content": "发电厂 原来 每天 烧煤 2.1 吨 ， 现在 每天 烧煤 比 原来 节约 (1/7) ． 现在 每天 节约 煤 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5381", "content": "一 桶 油 ， 第一次 用 去 (1/4) ， 第 二 次 比 第一次 多用 5 千克 ， 桶 里 还 剩 7.5 千克 ． 这 桶 油 原来 有 油 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16982", "content": "文文 的 父亲 是 一名 铲车 司机 ， 铲车 车轮 直径 大约 是 1.5 米 ， 如果 车轮 每分钟 转 20 周 ， 每分钟 铲车 可 行进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21856", "content": "18 厘米 + 25 厘米 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13773", "content": "三年级 2 个 班 ， 每班 有 45 个 同学 ， 一共 割 菜 810 千克 ， 平均 每个 同学 割 菜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17700", "content": "小康村 鱼塘 今年 养鱼 5600 条 ， 比 去年 增加 12% ， 小康村 鱼塘 去年 养鱼 多少 条 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5035", "content": "甲地 一辆 汽车 每 小时 行 70 千米 ， 5 小时 到达 乙地 ， 若 要 4 小时 到达 乙地 ， 每 小时 需 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4141", "content": "一 辆 客车 从 车站 出发 ， 全 车 座位 刚好 坐满 了 人 ， 到 甲 站 是 有 19 人 下车 ， 12 人 上车 ， 这时 车 上空 出 了 (1/5) 的 座位 ． 这辆 车上 共有 多少 个 座位 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13112", "content": "服装厂 第一 车间 有 150 人 ， 是 第 二 车间 人数 的 (5/7) ， 两个 车间 的 人数 正好 是 全厂 工人 总数 的 (6/7) ， 全厂 有 工人 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12722", "content": "要 把 4 个 粮库 里 的 粮食 运往 灾区 ， 其中 3 个 粮库 里 各 存粮 31 吨 ， 另 一个 粮库 里 存粮 35 吨 ， 如果 用 载重 8 吨 的 卡车 来 运 ， 需要 多少 辆 卡车 才能 把 这些 粮食 一次 运 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15682", "content": "同学 们 整理 图书 ． 女生 48 人 ， 男生 37 人 ， 每 5 人 分成 一组 ， 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5649", "content": "一 双 皮鞋 降价 后 卖 160 元 ， 比 原来 降价 20% ， 这种 皮鞋 原价 = 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7898", "content": "电视机厂 今年 计划 比 去年 增产 (3/20) ． 去年 生产 电视机 460 万台 ， 今年 计划 比 去年 增产 多少 万台 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22219", "content": "如果 一个 数 的 2 倍 是 32 ， 那么 这个 数 的 6 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6063", "content": "李 爷爷 参加 了 农村 合作 医疗保险 ． 条款 规定 ： 参保 者 住院 医疗费 补偿 设 起 付 线 ， 乡 （ 镇 ） 级 医疗机构 为 100 元 ， 在 起 付 线 以上 的 部分 按 70% 补偿 ． 今年 1 月份 李 爷爷 由于 意外 伤害 造成 骨折 ， 在 镇 定点医院 住院治疗 了 28 天 ， 医疗 费用 共计 5100 元 ． 按 条款 规定 ， 李 爷爷 只 需 自付 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20133", "content": "新 时代 玩具厂 有 一份 980 个 玩具 的 生产 订单 ， 如果 客户 要求 14 天 完成 ， 平均 每天 至少 需要 生产 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22688", "content": "甲 、 乙 两辆 汽车 同时 从 相距 287.5 千米 的 两地 相对 开出 ， 经过 2.5 小时 相遇 ． 甲 汽车 每 小时 行 47 千米 ， 乙 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6551", "content": "两个 数 相除 ， 商 是 5 ， 余数 是 20 ， 除数 最小 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8185", "content": "小 华 打字 的 速度 是 38 个 / 分 ， 他 12 分钟 大约 能 打 多少 个 字 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7542", "content": "一 个 圆 的 直径 增加 多少 厘米 后 ， 它 的 周长 就 增加 12.56 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6056", "content": "3 克 盐 溶解 在 12 克 水中 ， 盐 占 盐水 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6547", "content": "325 - 135 / 9 的 商 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6149", "content": "（ 123456 + 234561 + 345612 + 456123 + 561234 + 612345 ） / 7 = ．", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12282", "content": "修 一条 20 千米 的 路 ， 若 每天 修 (1/10) 千米 ， 多少 天 修 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6535", "content": "一 本书 600 页 ， 第一天 看 了 它 的 (1/4) ， 第 二 天 看 了 它 的 (2/5) ， 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9091", "content": "甲 、 乙 两个 粮仓 共存 粮 1400 吨 ， 甲 仓 运走 本 仓 的 12.5% ， 乙 仓 运进 100 吨 ， 现在 两 仓库 存粮 相等 ， 原来 甲 仓 存粮 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18802", "content": "沪宁 高速公路 全长 274 千米 ， 卡车 从 南宁 出发 ， 沿 沪宁 高速公路 开往 上海 ， 每 小时 行 90 千米 ， 已经 行 了 2 小时 ， 卡车 离 上海 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12353", "content": "甲乙 两 数 的 比 是 3 ： 5 ， 甲 数 是 15 ， 甲乙 两 数 的 和 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3329", "content": "在 1500 米 赛跑 中 ， 肖 飞 已经 跑 了 (3/5) ． 他 还要 跑 多少 米 才能 到达 终点 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18958", "content": "有 红 、 白 、 黑 3 种颜色 的 珠子 各 若干个 ， 放在 一个 口袋 里 ， 在 黑暗 中 最少 摸 出 多少 个 就 能 保证 有 一对 是 同样 颜色 的 珠子 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6199", "content": "一 幢 大楼 每 层高 2.84 米 ， 小 华 住 在 第 6 层 ． 小 华 家 的 地板 离 地面 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1864", "content": "3 （ 1 ） 班 男生 占 全班 人数 的 (9/11) ， 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3671", "content": "赵 叔叔 带 了 850 元 钱 买 大米 ． 买 了 26 袋 大米 ， 剩 18 元 ， 每 袋 大米 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3858", "content": "一 共有 436 人 参观 恐龙 馆 ， 平均 分成 4 批 ， 每批 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16995", "content": "仓库 里 存有 一批 面粉 ． 第一次 运走 8.5 吨 ， 第 二 次 运走 12.6 吨 ， 还 剩 4.3 吨 ， 这 批 面粉 有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10890", "content": "一 个 正方体 6 个 面 分别 涂成 黑色 和 白色 ， 当 它 被 抛起 后 ， 黑 面向 上 的 可能性 是 (1/2) ， 它 有 多少 个 面 被 涂成 了 黑色 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22293", "content": "妈妈 买 了 白布 15 米 ， 买 的 花布 比 白布 多 (1/3) ． 买 花布 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14154", "content": "某 铁路线 上 共有 14 个 车站 ， 这 条 铁路线 上 共 需 多少 种 不同 的 车票 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17023", "content": "一 个数 比 23 的 3 倍 多 4 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1307", "content": "图书室 借出 456 本 图书 ， 还 剩 207 本 ， 现在 又 还 回 285 本 ， 图书室 里 现在 有 多少 本 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2958", "content": "一 堆 水泥 ， 第一次 运走 总量 的 (1/4) ， 第 二 次 运走 28 吨 ， 还 剩下 总量 的 (2/5) 没有 运 ， 这 堆 水泥 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "696", "content": "小 明 妈妈 的 体重 是 爸爸 的 (4/5) ， 小 明 的 体重 是 妈妈 的 (3/5) ， 小 明 的 体重 是 30 千克 ， 爸爸 的 体重 = 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22048", "content": "一 本书 225 页 ， 小 红 第一天 看 了 它 的 (3/5) ， 第 二 天 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1955", "content": "列式 计算 ： 1.5 与 0.6 的 差 乘 3 与 1.8 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10266", "content": "甲 、 乙 两辆车 都 从 a 地 开往 b 地 ， 乙 车 的 速度 比 甲 车 慢 20% ， 甲 车行 完全 程 要 8 时 ， 乙 车行 完全 程 需要 多少 时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19449", "content": "为了 解决 灾区 群众 急需 的 粮食 ， 辽宁省 往 四川 灾区 紧急 调运 了 一批 大米 ． 第一 运输队 22 辆 大卡车 ， 每 车 装 15 吨 大米 ； 第 二 运输队 25 辆 大卡车 ， 每 车 装运 12 吨 大米 ， 还 剩 50 吨 没有 运走 ． 这 批 大米 一共 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "8056", "content": "乐乐 百货商店 委托 搬运 站 运送 500 只 花瓶 ， 双方 商定 每 只 运费 0.24 元 ， 但 如果 发生 损坏 ， 那么 每 打破 一只 不仅 不 给 运费 ， 而且 还要 赔偿 1.26 元 ， 结果 搬运 站 共 得 运费 115.5 元 ． 问 ： 搬运 过程 中共 打破 了 几只 花瓶 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7019", "content": "张老师 找 明明 、 亮 亮 、 红红 安排 “ 联欢晚会 ” 节目 的 事情 ， 和 明明 谈话 要 10 分钟 ， 和 亮 亮 谈话 要 8 分钟 ， 和 红红 谈话 要 15 分钟 ， 怎样 安排 谈话 顺序 ， 使 3 人 花 的 总 时间 最少 ？ 最少 = 多少 分钟 ？", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "3235", "content": "陈 大爷 把 10000 元 钱 存入 银行 ， 年利率 为 3.33% ， 存期 3 年 ． 到期 时 ， 可 得 本金 和 利息 共 多少 元 ？ （ 免去 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9847", "content": "11 的 多少倍 是 55 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1542", "content": "建 一座 厂房 ， 实际 投资 3 万元 ， 比 计划 投资 减少 (1/11) ， 原 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5514", "content": "用 2 、 3 、 4 、 5 这 4 个数 能 组成 多少 个 不同 的 3 位数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22632", "content": "服装厂 用 190 米 布 做 服装 ， 做 了 60 件 上装 ， 每件 用布 1.5 米 ， 其余 的 刚好 做 40 件 同样 的 大衣 ， 每件 大衣 用布 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18588", "content": "有 20 袋 大米 共 重 1000 千克 ， 如果 每 袋 多 装 50% ， 现在 每个 袋子 能 装 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18534", "content": "学校 组织 向 “ 青海 玉树 ” 灾区 捐款 ， 五年级 同学 捐款 420 元 ， 比 六年级 少 20% ， 六年级 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1787", "content": "收割机 4 小时 可 收 820 平方米 稻谷 ， 用 这样 的 速度 收割 2460 平方米 稻谷 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11807", "content": "运输队 运 一批 面粉 ， 第一次 运走 全部 的 (3/7) ， 第 二 次 运走 全部 的 (2/7) ， 两次 共 运走 了 45 吨 ， 这 批 面粉 一共 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12634", "content": "水果店 运 来 45 筐 苹果 ， 比 梨 多 10 筐 ， 柑橘 的 筐 数 是 苹果 的 1.2 倍 ． 运 来 柑橘 比 梨 多 多少 筐 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17894", "content": "稀释 果汁 调配 方式 是 1 杯 原汁 要 加上 4 杯 开水 ， 20 杯水 要 倒入 多少 杯 原汁 调配 ， 怎样 表示 果汁 原汁 与 水 的 杯 数 之间 的 关系 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11940", "content": "某校 五年级 有 女生 72 人 ， 男生 人数 的 (8/9) 与 女生 人数 相等 ， 该校 五年级 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10330", "content": "两副 扑克牌 共有 108 张 ， 4 位 小朋友 一起 玩 ， 按 顺序 循环 发牌 ， 最后 要 留 8 张 作为 底牌 ． 每人 发到 几张 牌 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2781", "content": "多少 比 12 少 20%", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1201", "content": "王 芳 的 爸爸 将 5000 元 钱 存入 银行 ， 存期 2 年 ， 年利率 为 2.25% ， 利息税 为 总 利息 的 20% ． 到期 后 ， 王 芳 的 爸爸 可以 得到 本金 和 税后 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "17103", "content": "六年级 学生 参加 植树 劳动 ， 男生 植 了 160 棵 ， 女生 植 的 比 男生 的 (3/4) 多 5 棵 ． 女生 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7119", "content": "某 商场 8 月份 营业额 是 420 万元 ， 按 营业额 的 5% 缴纳 营业税 ， 要 缴纳 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12277", "content": "光明 小学 六年级 有 95 人 ， 比 五年级 的 人数 少 (1/6) ， 五年级 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16485", "content": "某 景区 第一天 门票 收入 为 900 元 ， 第 二 天 比 第一天 增加 了 (1/5) ， 这 两天 的 门票 收入 一共 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9804", "content": "学校 美术组 有 40 人 ， 音乐 组 人数 是 美术组 人数 的 (2/5) ， 又 是 数学组 人数 的 (4/5) ． 数学组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7806", "content": "水果店 上午 运进 水果 230 千克 ， 下午 运进 的 比 上午 的 3 倍 少 50 千克 ． 这 一天 一共 运进 水果 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9778", "content": "火车 行 了 全程 的 (3/7) ， 还 剩 全程 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11673", "content": "一 个 圆柱 的 侧 面积 是 188.4 平方分米 ， 底面 半径 是 2 分 米 ． 它 的 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13150", "content": "星期天 ， 小 红 的 妈妈 买 回 一些 糖果 ， 准备 与 小 红 一起 去 孤儿院 看望 小朋友 ． 小 红 将 这些 糖果 分装 在 小袋 中 ， 每 袋装 入 0.25 千克 奶糖 和 0.15 千克 水果糖 ． 当 水果糖 用 去 5.4 千克 时 ， 用 去 的 奶糖 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20517", "content": "把 300 平均 分成 3 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3903", "content": "现有 浓度 为 20% 的 糖水 300 克 ， 要 把 它 变成 浓度 为 40% 的 糖水 ， 需 加糖 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11411", "content": "某校 今年 参加 电脑 学习 的 有 180 人 ， 比 去年 增加 了 20% ， 去年 参加 电脑 学习 的 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8823", "content": "工地 有 14 吨 水泥 ． 第一天 用 了 2.5 吨 ， 第 二 天 用 的 比 第一天 少 0.75 吨 ． 两天 后 还 剩 水泥 多少 吨 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6319", "content": "儿童公园 有 一个 圆形 的 金鱼池 ． 在 金鱼池 周围 围 2 圈 直径 是 15 米 的 圆形 钢条 栏杆 ， 至少 要 用 多少 米 钢条 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3346", "content": "若 按 7 ： 4 的 比 来 放飞 一群 鸽子 与 麻雀 ， 鸽子 就 比 麻雀 多 120 只 ， 鸽子 与 麻雀 共 放飞 多少 只 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19142", "content": "甲 、 乙 两个 小组 做 手工 制作 ， 甲组 4 人 共 做 80 件 ， 乙组 6 人 共 做 90 件 ． 甲 、 乙 两组 平均 每人 做 多少 件 手工 制作 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12078", "content": "玩具厂 要 做 2885 辆 电动 小汽车 ， 每天 做 208 辆 ， 已经 做 了 5 天 ， 还要 做 多少 辆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13458", "content": "一 个数 的 (3/4) 是 (1/2) ， 这个 数 的 (3/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5849", "content": "黄龙 体育馆 5 号 看台 有 52 排 ， 每排 有 35 个 座位 ． 这个 看台 共 能 坐 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4121", "content": "50 的 40% = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2352", "content": "某 水泥厂 去年 生产 水泥 4500 吨 ， 今年 计划 比 去年 多 生产 900 吨 ， 今年 计划 比 去年 增产 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20665", "content": "人体 中 的 血液 约 占 体重 的 (1/13) ， 小 华 的 体重 是 52 千克 ， 他 身体 中 的 血液 大约 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22738", "content": "食堂 第一周 烧煤 0.64 吨 ， 第 二 周 比 第一周 节约 0.09 吨 ， 两周 共 烧煤 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3351", "content": "一 个 长方体 的 长 是 7 cm ， 宽 是 4 cm ， 高 是 3 cm ， 它 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2226", "content": "学校 要 添 制 50 套 课桌椅 ， 桌子 每张 129 元 ， 椅子 每张 21 元 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11216", "content": "一 根 绳子 ， 第一次 剪 去 全长 的 (1/2) ， 第 二 次 剪 去 全长 的 (1/3) ， 两次 共 剪 去 7.5 米 ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13121", "content": "造纸厂 去年 计划 造纸 1600 吨 ， 实际 造纸 1800 吨 ， 实际 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1204", "content": "一 桶 油 ， 用 了 4 千克 ， 正好 是 这 桶 油 的 (2/5) ， 这 桶 油 还 剩 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13462", "content": "某 解放 车 队伍 长 450 米 ， 以 每秒 1.5 米 的 速度 行进 ． 一 战士 以 每秒 3 米 的 速度 从 排尾 到 排头 并 立即 返回 排尾 ， 那么 这 需要 多少 秒 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9408", "content": "水果店 运 来 一批 水果 ， 梨 的 质量 相当于 香蕉 的 (4/5) ， 运 来 梨 200 千克 ， 运 来 香蕉 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6612", "content": "一 匹 马 的 体重 是 306 千克 ， 一头 大象 的 体重 比 一匹 马 的 体重 的 4 倍 少 259 千克 ， 一头 大象 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19324", "content": "小 丽 有 5 种 不同 颜色 的 上衣 ， 3 种 不同 颜色 的 裤子 和 2 种 不同 颜色 的 裙子 ， 她 要 参加 同学 的 生日 宴会 ， 有 多少 种 不同 的 穿 法 可以 选择 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12405", "content": "已知 两个 数 相乘 的 积 是 11368 ， 且 其中 一个 因数 是 56 ， 那么 另外 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7633", "content": "一 个 正方形 花坛 内 共 种 菊花 4 层 ， 最 外层 每 边 种 12 棵 ， 共 种 菊花 多少 盆 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1868", "content": "小林 全家 坐 一辆 汽车 去 旅游 ？ 汽车 的 速度 是 62 千米 / 时 ， 第一天 行使 了 6 小时 ， 第 二 天 行使 了 5 小时 ， 两天 行使 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16647", "content": "一 盒 图钉 共 重 600 克 ， 取出 250 个 后 ， 剩下 的 重 525 克 ． 这 盒 图钉 共有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16543", "content": "修 一段路 ， 预计 每天 修 180 米 ， 刚好 15 天 修 完 ， 实际 每天 修 240 米 ， 修 完 这 段 路 实际 要 用 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15265", "content": "甲 、 乙 两 数 的 和 是 451 ， 甲 数 与 乙 数 的 比 是 4 ： 7 ， 乙 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18570", "content": "半圆 的 直径 是 2 厘米 ， 半圆 的 周长 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11806", "content": "丽丽 把 2000 元 压岁钱 存入 银行 ， 定期 一年 ， 准备 到期 把 税后 利息 捐赠 给 地震 灾区 儿童 ， 如果 按 4.14% 计算 ， 到期 可以 捐出 多少 钱 ？ （ 利息税 按 5% 计算 ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8532", "content": "有 160 吨 煤 ， 18 天 正好 烧 了 这 堆 煤 的 (3/4) ， 列出 最 简 的 算术 式子 表示 这 堆 煤 可 烧 的 天数 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10121", "content": "在 新 农村 建设 中 大 西村 要 修 一条 水泥路 ， 已修 了 180 米 ， 剩下 的 比 已修 的 3 倍 多 16 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22970", "content": "某 商场 出售 一种 优惠 购物 卡 ， 花 200 元 买 这种 卡 后 ， 凭 此 卡 可 在 这家 商场 享受 0.8 优惠 ． 在 购物 多少 元 时 ， 买 这种 购物 卡 合算 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12925", "content": "一 种 服装 原来 售价 60 元 ， 现在 降低 到 45 元 出售 ， 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3491", "content": "一 共有 8040 棵 果树 ， 其中 苹果树 有 14 行 ， 每行 420 棵 ． 其余 的 都 是 桃树 ， 已知 桃树 18 行 ， 桃树 每行 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6136", "content": "图书室 新 到 了 300 本 新书 ， 现 将 其中 的 (3/5) 贴 好 标签 ， 平均 放入 3 个 书架 ， 每个 书架上 放 了 几本 新书 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16145", "content": "在 一个 比例 中 ， 两个 内 项 的 积 是 5.6 ， 如果 一个 外 项 是 2.8 ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1540", "content": "果园 里 有 桃树 385 棵 ， 梨树 比 桃树 少 18 棵 ， 果园 里 有 梨树 、 桃树 共 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20935", "content": "有 一台 冰箱 ， 原价 2000 元 ， 降价 后 卖 1600 元 ， 降 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22630", "content": "水泥厂 有 一批 水泥 ， 已经 运走 了 268 袋 ， 剩下 的 比 运走 的 少 68 袋 ． 这 批 水泥 有 多少 袋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20761", "content": "一 辆 汽车 每 小时 行 78 千米 ， 是 一辆 自行车 速度 的 6.5 倍 ． 这辆 自行车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2432", "content": "庆元旦 ， 我校 准备 了 一些 气球 布置 教室 ， 发给 11 个 班 ， 每班 105 个 ， 学校 还 需要 留 50 个 备用 ， 学校 应 买 多少 个 气球 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3965", "content": "列车 通过 一座 长 2700 米 的 大桥 ， 从 车 头上 桥 到 车尾 离 桥 共用 了 3 分钟 ． 已知 列车 的 速度 是 每分钟 1000 米 ， 列车 车身 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12238", "content": "一 本书 188 页 ， 小 明 已经 看 了 60 页 ， 剩下 的 计划 每天 看 16 页 ， 还要 几天 才能 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12646", "content": "城乡 客车 从 县城 到 乡下 ， 去 的 时候 用 了 4 小时 ， 车 的 速度 60 千米 / 小时 ． 返回 时 只用 了 3 小时 ， 你 能 算 出 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7647", "content": "一 辆 大客车 从 织金 开往 重庆 ， 前 3 小时 行 了 180 千米 ， 照 这样 的 速度 ， 再行 8.5 小时 就 到 重庆 ． 织金 到 重庆 有 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22157", "content": "汽车 (1/3) 小时 行 20 千米 ， 平均 每 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4713", "content": "甲 、 乙 两列 火车 同时 从 a 、 b 两城 相对 开出 ， 甲 每 小时 行 53.4 千米 ， 乙 每 小时 比 甲 多行 1.6 千米 ， 5 小时 后 两车 相遇 ． 求 a 、 b 两城 间 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20464", "content": "六年级 一班 有 学生 45 人 ， 其中 男生 人数 是 女生 人数 的 (4/5) ． 六年级 一班 有 女生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21764", "content": "联想 牌 电脑 现在 每 台 的 价格 是 6000 元 ， 比 原价 降低 400 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14771", "content": "一 瓶 蜂蜜 有 (1/2) 升 ， 芳 芳 喝 去 了 这 瓶 蜂蜜 的 (1/4) ， 这 瓶 蜂蜜 还 剩 多少 升 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23158", "content": "计算 ： 20112010 * 20122013 - 20112011 * 20122012 + 10002 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "15038", "content": "书 2 架 上层 有 80 本书 ， 下层 比 上层 的 4 倍 还 多 12 本 ， 这 书架 下层 比 上层 多 几本书 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3438", "content": "修 一条 高速公路 ， 甲队 修 了 全长 的 36% ， 乙 队 修 了 全长 的 42% ， 乙 队 比 甲队 多 修 了 4.2 千米 ． 这 条 高速公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4256", "content": "小 红 家养 有 母鸡 24 只 ， 公鸡 6 只 ． 她 家养 的 公鸡 的 只 数 是 母鸡 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1808", "content": "小强 有 12.5 元 ， 乐乐 有 18.5 元 ， 两 人 合 买 一套 《 格林童话 》 ， 还 差 8.2 元 ， 这 套书 售价 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21466", "content": "学校 植树 50 棵 ， 成活率 为 90% ， 成活 了 多少 棵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16339", "content": "甲 数 比 乙 数 少 3.5 ， 甲 数 是 2.8 ， 乙 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9955", "content": "5 星 家电 商场 运进 一批 格力空调 ， 已经 卖出 了 一半 少 2 台 ， 还 剩下 27 台 格力空调 ． 这 批 空调 原来 有 多少 台 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22295", "content": "拖拉机 以 每 小时 20 千米 的 速度 行驶 一段 路程 后 ， 立即 沿 原 路 以 每 小时 30 千米 的 速度 返回 ， 往返 的 平均速度 是 每 小时 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7631", "content": "张 阿姨 在 书店 买 了 两本书 ， 一本 10.6 元 ， 另 一本 25.8 元 ， 张 阿姨 付 了 50 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15191", "content": "电视机厂 去年 计划 生产 彩电 20 万台 ， 结果 生产 25 万台 ． 完成 了 计划 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5758", "content": "“ 5 • 一 ” 假期 ， 妈妈 买 一台 洗衣机 花 了 2508 元 ， 还 买 了 一台 冰箱 ， 冰箱 比 洗衣机 便宜 365 元 ， 买 这 两样 电器 共用 了 多少 元 钱 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17242", "content": "苗苗 学 具 厂 要 生产 教学 用具 10000 袋 ， 平均 每天 生产 206 袋 ， 已经 生产 了 43 天 ． 还 剩 多少 袋 没有 生产 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10384", "content": "“ 5 • 一 ” 假期 ， 妈妈 买 一台 洗衣机 花 了 2508 元 ， 还 买 了 一台 冰箱 ， 冰箱 比 洗衣机 便宜 463 元 ， 买 这 两样 电器 共用 了 多少 元 钱 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17391", "content": "期中考试 时 ， 聪聪 班上 语文 及格 的 有 48 人 ， 数学 及格 的 有 49 人 ， 两 科 都 及格 的 有 41 人 ， 没有 双 科 不及格 的 ， 聪聪 班上 共有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "512", "content": "陶 老师 家 上 月 用 去 的 水电费 比 本月 多 28 元 ， 本月 的 水电费 比 上 月 节约 (2/9) ， 上 月 用 去 水电费 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6493", "content": "一 辆 旅游车 以 50 千米 / 时 速度 在 平原 行驶 了 3 小时 ， 又 以 30 千米 / 时 的 速度 行驶 了 2 小时 ． 这 段 路程 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21397", "content": "明明 5 一节 去 岳麓山 ， 上山 的 速度 是 每分钟 20 米 ， 下山 按 原 路 返回 ， 速度 是 每分钟 30 米 ， 求 他 这次 往返 岳麓山 的 平均速度 = 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20385", "content": "电视 中 说 ： 在 科技节 的 14 天 期间 ， 我市 参观 各种 科技 展览 的 人数 达 252 万 人 ， 平均 每天 有 多少 万 人 参观 展览 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10405", "content": "一 本 童话故事 书 24 页 ， 丁丁 第一天 看 了 全书 的 (1/8) ， 第 二 天 看 了 全书 的 (5/6) ， 丁丁 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5854", "content": "25 的 2 倍 去除 8 个 125 相加 的 和 ， 结果 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6418", "content": "学校 美术 小组 有 男生 24 名 ， 女生 18 名 ． 合唱队 的 人数 是 美术 小组 的 3 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11534", "content": "一 只 长颈鹿 高 5.72 米 ， 比 一只 大象 高 (1/3) ． 这 只 大象 高 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13010", "content": "每个 书架 有 4 层 ， 每层 可以 放 16 本书 ． 学校 图书馆 有 18 个 这样 的 书架 ， 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16789", "content": "林场 载 了 450 棵 松树 苗 ， 柏树 苗 的 棵 数 比 松树 苗 多 276 棵 ． 如果 把 这些 松树 苗 、 柏树 苗 栽 成 12 行 ， 平均 每行 栽 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14878", "content": "有 一些 葡萄 重 (7/8) 千克 ， 吃 了 (1/7) 后 ， 还 剩 (3/4) 千克 ， 吃 了 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14576", "content": "列式 计算 ． 从 (3/5) 里面 减去 (1/10) 与 (3/8) 的 和 ． 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9909", "content": "一 辆 卡车 4 小时 行驶 了 182 千米 ， 这辆 卡车 从 甲 仓库 运货 到 乙 仓库 行驶 了 637 千米 ， 求 一共 行驶 了 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21725", "content": "童话故事 每套 38 元 ， 外星人 历险记 每套 125 元 ， 学校 各 买 15 套 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6384", "content": "一 个数 的 (3/5) 是 25 的 (2/5) ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19039", "content": "有 一袋 糖 ， 如果 每个 小朋友 分 8 颗 ， 可以 分给 7 个 小朋友 ， 还 剩 4 颗 ． 这 袋 糖 有 多少 颗 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9997", "content": "一 块 菜地 300 平方米 ， 其中 45% 种 黄瓜 ； 黄瓜 的 种植 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5399", "content": "一 根 绳子 长 36 米 ， 剪 去 (3/4) ， 剪 去 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14274", "content": "一 种 收音机 每 台 售价 今年 比 去年 降低 25% ， 今年 每 台 售价 36 元 ， 去年 每 台 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21449", "content": "一 个 平行四边形 底 长 18 厘米 ， 高 11 厘米 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "878", "content": "六1 班 一共 有 48 人 ， 每人 至少 订阅 一种 报刊 ， 其中 (5/6) 的 人 订阅 《 小学生 数学 报 》 ， (3/4) 的 同学 订阅 《 小学生 语文 学习 》 ， 两种 都 订 的 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18678", "content": "一 台 电脑 原价 6000 元 ， 先 打 0.9 促销 ， 然后 又 打 了 0.8 ． 这 台 电脑 现在 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2945", "content": "同学 们 参加 达标 活动 ， 达到 优 的 原有 50 人 ， 现在 增加 了 15 人 ， 增加 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5131", "content": "甲 是 乙 的 4 倍 ， 甲乙 的 和 是 乙 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15019", "content": "一 个 平行四边形 的 钢板 ， 面积 是 7.2 平方米 ， 量 得 它 的 底 是 6 米 ． 它 的 高 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18815", "content": "3 个 同学 跑步 ， 甲 、 乙 、 丙 的 速度 比 是 4 ： 3 ： 2 ． 甲 跑 了 600 米 ， 乙 比 丙 多 跑 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7400", "content": "一 桶 油 ， 第一次 用 去 (2/5) ， 第 二 次 比 第一次 多 2 千克 ， 桶 里 还 剩下 3 千克 ． 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14922", "content": "图书馆 有 25 个 同样 的 书架 ， 每个 书架 有 4 层 ， 每层 放 240 本书 ， 这些 书架 一共 能 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12373", "content": "某 商店 委托 搬运 公司 运送 10000 个 瓷碗 ， 每个 瓷碗 的 运费 是 0.18 元 ， 如果 破损 一个 不但 不 给 运费 ， 反而 倒扣 2.22 元 ． 最后 结账 ， 搬运 公司 共 得 运费 1761.6 元 ． 问 ： 搬运 中 破损 了 几个 瓷碗 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1239", "content": "学校 旁边 的 工地 上 在 修路 ， 卡车 已 运来了 40 吨 沙子 ， 正好 占 了 一天 用 沙量 的 20% ， 为了 赶 工程进度 ， 工人 们 加快 了 修路 的 速度 ， 工地 每天 的 用 沙量 也 增加 了 35% ， 卡车 每天 应 多 运 多少 吨 沙子 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20567", "content": "罗江县 开展 中小学 经典 诵读 比赛 ， 某校 带 了 960 元 钱 去 购买 比赛 用 服装 ， 买 了 12 套 ， 还 剩 72 元 ， 每套 服装 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5172", "content": "一 个 滴水 的 水龙头 一天 要 浪费 43 千克 水 ， 照 这样 计算 ， 一个 漏水 的 水龙头 一年 浪费 多少 千克 水 ？ （ 一年 按 365 天 计算 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14122", "content": "兴华 制衣厂 加工 一批 衣服 ， 每天 加工 380 件 ， 一共 加工 了 25 天 ， 还 剩 1260 件 没 做 ， 兴华 制衣厂 一共 要 加工 多少 件 衣服 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18239", "content": "把 480 千克 苹果 按 3 ： 5 分给 甲 、 乙 两个 人 ， 甲 分 得 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9531", "content": "有 9 筐 重量 相等 的 橘子 ， 如果 从 每 筐 取出 25 千克 ， 那么 剩下 的 橘子 正好 等于 原来 4 个 筐 的 重量 ， 原来 每 筐 有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18023", "content": "希望 小学 四年级 ， 春天 植树 时 ， 安排 了 36 人 抬 水 ． 剩下 的 同学 植树 ， 每 8 人 一组 ， 共 分 了 23 个 小组 ． 希望 小学 四年级 共用 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22596", "content": "6 一 儿童节 ， 延庆县 人民商场 按 0.85 出售 一种 童车 ， 原价 每辆 400 元 ， 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21302", "content": "实验 小学 六年级 原来 有 125 人 参加 科技 小组活动 ， 现在 有 275 人 参加 ， 现在 参加 的 人数 比 原来 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "637", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行驶 了 全程 的 (3/5) 时 正好 是 360 千米 ， 甲地 和 乙地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20910", "content": "10 除 多少 得 5 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13191", "content": "新华 小学 去年 有 120 台 电脑 ， 今年 的 电脑 数 比 去年 增加 了 (1/4) ， 今年 有 多少 台 电脑 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6914", "content": "一 个 排球 的 价钱 是 52.8 元 ， 一个 足球 的 价钱 是 排球 的 1.5 倍 ． 买 一个 排球 和 一个 足球 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19822", "content": "学校 共有 图书 0.385 万册 ， 其中 文艺 书 0.12 万册 ， 科技 书 0.06 万册 ， 其余 是 故事书 ， 故事书 有 多少 万册 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14862", "content": "工人 叔叔 一天 加工 12 个 零件 ， 照 这样 计算 ， 15 个 工人 10 天 可以 加工 多少 个 零件 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18460", "content": "如果 一台 电扇 按 原价 的 0.85 出售 ， 售价 为 204 元 ， 这 台 电扇 的 原价 为 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "928", "content": "3 个 同学 踢毽子 ， 小 红 踢 了 72 个 ， 小 光 踢 的 个数 是 小 红 的 (7/8) ， 小 梅 踢 的 个数 是 小 光 的 (5/7) ． 小 梅 踢 了 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11195", "content": "李老师 买 了 3 本书 ， 价格 分别 是 7.80 元 、 5.65 元 、 6.20 元 ， 他 付出 20 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7941", "content": "迎宾 广场 运 来 180 盆花 ， 准备 摆在 6 个 花坛 里 ， 平均 每个 花坛 摆 多少 盆花 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12664", "content": "一 根 电话线 长 9 米 ． 用 去 了 (2/3) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19922", "content": "2010 年 世界杯 足球赛 小组赛 共有 8 个 组 ， 每组 4 个 队 ， 一共 有 736 名 运动员 参加 比赛 ． 每个 队 有 多少 名 运动员 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8810", "content": "移民 小学 参加 庆 6 • 一 体操 表演 ， 如果 每行 24 人 ， 要 排 18 行 ． 如果 每行 27 人 ， 要 排 多少 行 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6025", "content": "甲 船 从 南京 出发 ， 每 小时 行 51.5 千米 ， 乙 船 从 上海 出发 ， 每 小时 行 60.5 千米 ． 两艘 船 同时 出发 ， 3.5 小时 相遇 ， 南京 到 上海 的 水路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11886", "content": "水果店 有 480 千克 水果 ， 其中 苹果 占 (3/8) ． 卖出 苹果 的 (3/4) ， 卖出 苹果 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18225", "content": "一 个数 的 (1/2) 比 它 的 (1/3) 多 18 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15394", "content": "红旗 小学 四年级 有 45 名 同学 ， 一共 为 青海 玉树 地震 灾区 捐款 540 元 ， 平均 每人 捐款 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16866", "content": "有 一份 5700 字 的 文件 ， 甲乙 两个 打字员 同时 打印 ， 甲 每 分 打 100 个 字 ， 乙 每 分 打 90 个 字 ， 打 完 这份 文件 需要 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16136", "content": "华联 超市 展开 “ 庆 6 一 童车 促销 ” 活动 ， 6 月 1 日 上午 售出 总数 的 一半 少 3 辆 ， 下午 售出 剩下 的 一半多 2 辆 ， 还 剩 12 辆 没有 卖出 ． 华联 超市 这次 活动 准备 了 多少 辆 童车 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10609", "content": "中心小学 综合楼 实际 投资 230 万元 ， 比 计划 节约 了 20 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7908", "content": "路边 有 松树 12 棵 ， 杨树 的 棵 树 是 松树 的 (5/6) ， 同时 又 是 杉树 的 (2/3) ． 杉树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6957", "content": "师徒 两 人 加工 一批 零件 ， 由 师傅 独 做 需 37 小时 ， 徒弟 每 小时 能 加工 30 个 零件 ， 现 由 师徒 两 人 同时 加工 ， 完成 任务 时 ， 徒弟 加工 的 个数 是 师傅 的 (5/9) ． 这 批 零件 共有 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12871", "content": "我们 学校 有 6 个 年级 ， 每个 年级 有 4 个 班 ， 每班 有 40 名 学生 ， 学校 共有 多少 名 学生 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13395", "content": "小 明 看 一本 620 页 的 书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 31 页 ， 两天 共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3564", "content": "小 明 (2/3) 小时 看 了 24 页 书 ， 要 看 180 页 书 ， 需要 多少 时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5957", "content": "有 沙土 8 立方米 ， 要 铺 在 长 5 米 、 宽 4 米 的 沙坑 里 ， 可以 铺 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2591", "content": "5 （ 一 ） 有 50 人 ， 女生 24 人 ， 男生 占 全班 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14113", "content": "一 件 上衣 打 0.7 后 售价 91 元 ， 这件 上衣 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13794", "content": "食堂 买来 240 千克 的 菜 ， 吃 了 一些 还 剩下 160 千克 ， 吃 了 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6093", "content": "某 小学 六年级 一班 有 男生 20 人 ， 正好 是 女生 人数 的 80% ， 六年级 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16975", "content": "一 本 故事书 120 页 ， 小 红 读 了 它 的 (3/4) ， 还 剩 多少 页 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5094", "content": "小 明 的 爸爸 今年 32 岁 ， 小 明 8 岁 ， 4 年前 爸爸 的 岁数 是 小 明 的 多少倍 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13113", "content": "480 与 160 的 差 乘 272 与 138 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12259", "content": "商店 出售 一种 足球 ， 按 0.8 处理 ， 每个 足球 售价 160 元 ， 比 原价 便宜 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2578", "content": "张 阿姨 (2/3) 小时 做 了 8 个 纸花 ， 1 小时 做 多少 个 纸花 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3708", "content": "王 钢 把 50000 元 人民币 存入 银行 ， 定期 2 年 ， 年利率 （ 每 一年 的 利率 ） 是 2.7% ． 到期 时 ， 王 钢 应得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7362", "content": "洛阳市 出租车 收费 标准 ： 起步价 5 元 （ 含 3 公里 ） ， 以后 每 公里 1.5 元 ． 小 明 和 爸爸 乘 7 公里 到 学校 ， 应付 车费 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14539", "content": "一 条 绳子 ， 第一次 剪 去 5 米 ， 第 二 次 剪 去 余下 的 (1/5) ， 这时 还 剩下 10 米 ， 这 条 绳子 原来 有 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12301", "content": "一 个 粮站 的 仓库 里 存有 大米 4000 千克 ， 一月份 卖出 总数 的 (3/10) ， 二 月份 卖出 总数 的 (1/5) ， 还 剩下 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1612", "content": "一 个 圆柱体 茶叶罐 ， 底面 半径 是 4.5 厘米 ， 高 是 10 厘米 ， 在 它 的 侧面 贴 上 商标纸 ， 商标纸 至少 = 多少 厘米 ^ 2 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "19227", "content": "一 种 电视机 ， 原来 售价 1200 元 ， 现在 比 原来 降低 了 (1/6) ． 现在 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3870", "content": "一 桶 油 用 去 25% ， 还 剩 12 千克 ， 这 桶 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11618", "content": "甲 堆 货物 重 204 吨 ， 乙 堆 货物 的 重量 是 甲 堆 的 (1/2) ， 是 丙 堆 货物 重量 的 (3/4) ， 丙 堆 货物 重 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9369", "content": "爸爸 比 妈妈 少 372 元 ， 妈妈 的 钱 是 爸爸 的 4 倍 ， 妈妈 有 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8842", "content": "工人 叔叔 挖土 准备 建造 一批 居民区 的 房子 ． 每 小时 能 运走 12 车 的 泥土 ， 运 了 5 小时 后 还有 30 车 的 泥土 没 运 完 ， 一共 需要 运走 几车 泥土 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8479", "content": "四年级 同学 准备 制作 240 个 小 灯笼 庆祝 国庆节 ， 已经 做 了 8 天 ， 还 剩 32 个 没 做 ， 平均 每天 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4743", "content": "一 箱 葡萄 重 28 千克 ， 吃 了 (1/4) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "193", "content": "计算 （ 124 + 125 + 126 + 127 + 1 ） * 4 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "18582", "content": "一 根 木料 长 24 米 ， 把 它 锯 成 3 米 长 的 一段 ． 每 锯 一段 要 用 6 分钟 ， 共用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4938", "content": "小 猴 采 了 18 个 桃子 ， 大 猴 采 的 个数 是 小 猴 的 3 倍 ， 大 猴 比 小 猴 多 采 了 多少 个 桃子 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15949", "content": "一 块 正方形 菜地 ， 边长 是 12 米 ， 它 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1946", "content": "李老师 将 5000 元 钱 存入 银行 ， 定期 一年 ， 年利率 是 2.25% ， 利息税 是 20% ， 到期 时 李老师 可 获得 本金 与 利息 一共 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "13340", "content": "小 明 看 一本 故事书 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 (2/5) ， 还 剩 21 页 ， 这 本书 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16744", "content": "一 堆 黄沙 重 120 吨 ， 一堆 石子 重量 的 (2/3) 与 黄沙 重量 的 (5/6) 相同 ， 这 堆 石子 重 多少 吨 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7473", "content": "40000 - 82620 / 27 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3639", "content": "看 一 本书 ， 每天 看 全书 的 (1/9) ， 3 天 看 了 全书 的 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12723", "content": "修 一条 公路 ， 计划 每天 修 1400 米 ， 15 天 修 完 ． 结果 时间 缩短 到 原来 的 70% ， 实际 每天 修路 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18835", "content": "李 明 平均 每分钟 走 80 米 ， 从 家 到 学校 要 走 12 分钟 ． 他家 离 学校 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17635", "content": "某 件 衣服 单价 200 元 ， 加价 10% ， 再 打 0.9 ， 这件 衣服 的 现价 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2976", "content": "有 一个 长方体 蓄水池 ， 长 3 米 、 宽 2 米 、 高 1.2 米 ． 水池 里 水深 0.5 米 ． 与 水 接触 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "17031", "content": "王师傅 买 了 6 千克 黄瓜 ， 付给 售货员 15 元 ， 找回 1.2 元 ， 每千克 黄瓜 = 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10099", "content": "五年级 有 14 人 参加 比赛 ， 六年级 有 42 人 参加 比赛 ， 已知 参加者 有 (2/7) 获奖 ， 获奖 的 人 有 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7856", "content": "一 辆 汽车 按 一定 的 速度 从 甲 城 开往 乙 城 5 小时 可以 到达 ． 这辆 汽车 从 甲 城 开出 3.5 小时 后 ， 距 乙 城 还有 90 千米 ． 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8605", "content": "服装厂 要 加工 一批 儿童服装 ， 如果 每套 用布 1.5 米 ， 现有 的 布料 可以 加工 480 套 ． 如果 每套 多 用布 0.1 米 ， 这 批 布料 可以 加工 多少 套 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7512", "content": "果园 里 有 苹果树 98 棵 ， 比 桃树 多 (1/6) ， 果园 里 有 桃树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16036", "content": "明明 将 一根 5.4 米 的 竹竿 插入 池水 中 ， 来 测 池水 的 深度 ， 已知 插入 泥 的 部分 长 0.6 米 ， 露出 水面 的 部分 长 1.23 米 ， 水深 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6505", "content": "王老师 买 回 一批 球 ， 其中 篮球 的 个数 是 足球 的 (3/4) ， 足球 的 个数 是 排球 的 (2/3) ， 篮球 有 15 个 ， 排球 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5124", "content": "养鸡 专业户 王 大伯 去年 养鸡 1090 只 ， 今年 养鸡 只 数 增加 到 去年 的 3 倍 ． 今年 养鸡 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9743", "content": "长颈鹿 行进 的 平均速度 为 50.18 千米 / 小时 ， 非洲 象 行进 的 平均速度 为 38.6 千米 / 小时 ． 长 劲 鹿 行进 的 平均速度 是 非洲 象 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5213", "content": "建筑工地 运 来 黄砂 15 吨 ， 运 来 的 水泥 比 黄砂 的 吨数 少 (1/3) ． 运 来 的 黄砂 比 水泥 多 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8914", "content": "六年级 （ 1 ） 班 男生 是 全班 人数 的 (2/5) ， 则 女生 是 全班 总 人数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8210", "content": "某 商场 昨天 卖出 电视机 45 台 ， 比 卖出 的 洗衣机 的 台数 的 75% 多 3 台 ， 昨天 卖 洗衣机 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1196", "content": "一 种 机器 零件 原来 成本 4.5 元 ， 改进 技术 后 ， 降低 了 (3/20) ， 现在 的 成本 是 每件 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1627", "content": "一 袋 大米 重 20 千克 ， 第一周 吃 了 6 千克 ， 第 3 周 吃 了 7 千克 ． 还 剩下 这 袋 大米 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21578", "content": "学校 用 1250 元 买 了 5 套 办公 桌椅 ， 已知 每 把 椅子 100 元 ， 每张 桌子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17565", "content": "瑞安 • 福州 两地 路程 380 千米 ， 一辆 动力火车 从 瑞安 站 出发 行驶 了 全程 的 (5/19) ， 还要 行驶 多少 千米 到达 福州 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3489", "content": "一 桶 油 ， 用 去 20% 后 连 桶 重 27 千克 ． 用 去 (1/2) 后 连 桶 共 重 18 千克 ． 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11689", "content": "一 个 长方体 的 底 面积 是 75 cm ^ 2 ， 高 是 15 cm ， 它 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16473", "content": "甲乙 两列 火车 同时 从 相距 300 千米 的 两地 相对 看出 ， 2 小时 后 没有 相遇 还 相距 20 千米 ， 已知 甲 车 每 小时 行 75 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10638", "content": "6.79 / 0.15 的 商 是 45 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11268", "content": "已知 一个 数 的 (4/7) 是 32 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20754", "content": "一 种 商品 打 0.85 后 出售 ， 售价 降低 了 450 元 ， 现在 买 这种 商品 需要 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10283", "content": "一 个 游泳池 可以 容 水 840 吨 ， 游泳池 装有 一个 进水管 ， 一个 出水管 ， 若 单 开 进水管 8 小时 能 把 空 池 注满 ， 若 单 开 出水管 7 小时 可以 把 满 池水 排空 ， 两 管 一起 开 ， 几小时 能 把 满 池水 排空 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16947", "content": "一 双 球鞋 打 0.75 出售 ， 现价 300 元 ， 原来 每 双 售价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13224", "content": "小 明 今天 看书 63 页 ， 昨天 看书 的 页数 是 今天 的 (1/9) ． 问 ： 小 明 昨天 看书 多页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1605", "content": "一 辆 车长 11 米 ， 每秒 可 行驶 20 米 ， 这辆 车 要 通过 一座 长 969 米 的 大桥 ， 需要 用 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16040", "content": "工程队 修 一条 公路 ， 4 天 完成 这项 工程 的 (4/15) ， 每天 完成 这项 工程 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21288", "content": "体育 用品商店 里 排球 数量 是 篮球 的 (1/3) ， 篮球 数量 又 是 足球 的 (5/8) ． 排球 有 50 个 ， 足球 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21055", "content": "超市 运回 了 240 箱 面条 ， 卖 了 3 天 后 ， 还 剩 90 箱 ， 超市 平均 每天 卖 多少 箱 面条 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20919", "content": "李 伯伯 家养 了 24 只 鸡 ， 鸭 的 只 数 是 鸡 的 (5/6) ， 也 是 鹅 的 (5/4) ． 李 伯伯 家养 了 多少 只 鹅 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14763", "content": "一 件 大衣 打 0.9 后 是 81 元 ， 比 原来 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6692", "content": "2012 个 乒乓球 手 淘汰赛 最后 决出 一个 冠军 要 比 多少 场 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22986", "content": "5 年 一班 有 男生 25 人 ， 占 全班 人数 的 (5/9) ． 全班 共有 学生 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18598", "content": "一 桶 油 20 千克 ， 用 去 一些 后 还 剩下 (2/5) ． 用 去 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22361", "content": "植物园 举办 花卉 展 ， 紫色 郁金香 有 160 朵 ， 红色 郁金香 的 朵 数 是 紫色 的 3 倍 还 多 21 朵 ． 红色 郁金香 有 多少 朵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1471", "content": "一 根 圆形 柱子 的 周长 是 6.28 米 ， 这根 柱子 的 直径 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6872", "content": "人民 路 小学 建造 新 教学楼 ， 原 计划 投资 68 万元 ， 实际 投资 比 计划 增加 20% ， 实际 投资 多少 万元 ？ （ 列 综合 算式 解 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8724", "content": "明明 和 亮 亮 在 环形 跑道 上 跑步 ， 两 人 同时 从 同一 地点 向 相反 的 方向 跑 去 ， 经过 40 秒 两 人 相遇 ， 这 条 跑道 长 360 米 ， 明明 每秒 跑 5 米 ， 亮 亮 每秒 跑 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16616", "content": "养鸡场 养 母鸡 800 只 ， 公鸡 的 只 数 是 母鸡 的 (1/16) ， 养鸡场 共 养鸡 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21686", "content": "丁丁 看 一本 200 页 的 书 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 45 页 ， 还 剩 多少 页 没有 看 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22651", "content": "甲乙 两 数 的 比 是 3 ： 7 ， 乙 数 减 甲 数 得 20 ， 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23141", "content": "老李 用 80 天 时间 完成 了 一项 任务 ， 比 计划 节省时间 (1/5) ． 计划 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8980", "content": "(5/6) 比 (3/8) 与 (1/3) 的 和 多 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20391", "content": "修路 队 修 一条 长 800 米 的 路 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 第一天 的 (4/5) ， 两天 一共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3055", "content": "一 堆 货物 重 150 吨 ， 用 去 了 30 吨 ， 还 剩 总数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19677", "content": "一 种 手表 ， 原价 每块 108 元 ， 现价 81 元 ， 便宜 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12469", "content": "汽车 从 甲地 到 乙地 计划 每 小时 行 50 千米 . 7 小时 到达 ， 实际 3 小时 行 了 180 千米 ． 这样 行 完全 程 要 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21201", "content": "两个 因数 的 积 是 0.96 ， 其中 一个 因数 是 1.2 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13214", "content": "某 厂 今年 创 利润 90 万元 ， 比 去年 多 创 利润 15 万元 ， 今年 比 去年 多 创 利润 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6396", "content": "一 辆 汽车 从 甲地 到 乙地 ， 每 小时 行 45 千米 ， 4.8 小时 到达 ． 如果 每 小时 多行 5 千米 ， 几小时 到达 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13614", "content": "比 10 的 (4/5) 多 (1/2) 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18353", "content": "32 / 多少 = 5 … 2 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12498", "content": "某 煤厂 有 一批 煤 ， 第一天 运走 总数 的 (2/5) ， 第 二 天 运走 总数 的 (1/3) ， 还 剩下 80 吨 ， 原有 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21551", "content": "人体 的 血液 占 体重 的 (1/13) ， 血液 里 约 (2/3) 是 水 ， 爸爸 的 体重 是 78 千克 ， 他 的 血液 大约 含水 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2792", "content": "甲 、 乙 两班 人数 的 比 为 3 ： 4 ， 其中 甲班 有 42 人 ， 你 知道 甲 、 乙 两班 共有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3113", "content": "一 共有 25 个 小组 ， 每组 里 4 人 负责 挖坑 种树 ， 2 人 负责 挑水 浇 树 ， 一共 有 多少 名 同学 参加 了 这次 植树 活动 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3734", "content": "录音机 厂 由于 改进 技术 ， 每 台 成本 比 原来 降低 了 (3/20) 后 每 台 成本 只要 51 元 ， 原来 每 台 成本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17304", "content": "两个 海港 之间 的 航路 为 1200 千米 ， 甲 、 乙 两 艇 同时 从 两 港 相对 开出 ， 12 小时 后 还 相距 48 千米 ． 已知 甲 艇 每 小时 行 47 千米 ， 乙 艇 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12134", "content": "小 军 带 50 元 去 商店 买 东西 ． 她 买 了 一副 36 元 的 乒乓球拍 ， 剩下 的 钱 正好 可以 买 7 个 乒乓球 ． 每个 乒乓球 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "626", "content": "数学考试 全班 平均 分为 85 分 ， 其中 有 (4/5) 的 人 及格 ， 及格 的 人 的 平均 分为 93 分 ， 那么 不及格 的 人 的 平均分 = 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3595", "content": "一 个数 的 (1/5) 比 它 的 (1/6) 多 60 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2091", "content": "学校 卖 来 一批 图书 ， 平均 发给 18 个 班 ， 每班 206 本 ， 还 剩 430 本 放在 图书室 ． 这 批 图书 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10848", "content": "5 （ 1 ） 班 昨天 的 出勤率 是 96% ， 全班 共有 50 人 ， 多少 人 有事 请假 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20710", "content": "小 明 有 48 张 邮票 ， 是 小 芳 邮票 数 的 (3/4) ， 小 丽 的 邮票 张 数 是 小 芳 的 (3/8) ， 小 丽 有 多少 张 邮票 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8996", "content": "一 条 长 100 米 的 道路 一旁 每隔 4 米 插 一面 小旗 ， 一共 要 插 多少 面 小旗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15952", "content": "买 3 支 钢笔 比 买 5 支 圆珠笔 要 多 花 4.5 元 ． 每支 圆珠笔 的 价钱 是 1.5 元 ． 每支 钢笔 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17254", "content": "1 + 2 + … + 100 ﹦ ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8562", "content": "比 (1/6) 的 倒数 多 2 的 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19486", "content": "王 林 读 一本 故事书 ， 已经 读 了 全书 的 60% ， 还 剩 120 页 没 读 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10669", "content": "哥哥 今年 8 岁 ， 妹妹 今年 3 岁 ， 10 年 后 ， 哥哥 和 妹妹 相差 多少岁 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17230", "content": "一 台 售价 2800 美元 的 手提电脑 ， 折合 成 人民币 = 多少 元 ？ （ 1 美元 等于 7.85 元 人民币 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16456", "content": "锯 一根 12.5 米 长 的 木棒 ， 每 锯 一段 要 2 分钟 ． 如果 把 这根 木棒 锯 成 相等 的 6 段 ， 一共 要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21441", "content": "一 种 药瓶 的 包装 上 写 着 ： 90 片 ， 每片 10 毫克 ． 医生 开 的 处方 上 写 着 ： 每天 吃 3 次 ， 每次 20 毫克 ． 这 瓶 药 按 医生 的 处方 ， 可以 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15921", "content": "小 晴 看 一 本书 ， 第一天 看 了 18 页 ， 是 第 二 天 看 的 (2/3) ． 两天 一共 看 了 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16847", "content": "商场 搞 促销 ， 一件 大衣 原价 120 元 ， 现价 95 元 ， 买 12 件 大衣 ， 现在 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "254", "content": "一 个 平行四边形 的 面积 是 36 平方米 ， 底 是 7.2 米 ， 高 应 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18761", "content": "一 块 平行四边形 花圃 ， 它 的 底 是 25 米 ， 比高 多 5 米 ． 平均 每平方米 产 鲜花 50 枝 ， 那么 这块 地 一共 可以 产 鲜花 多少 枝 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21435", "content": "一 个 圆柱形 量筒 ， 底面 半径 是 2 厘米 ， 把 一块 铁块 从 这个 量筒 里 取出 后 ， 水面 下降 5 厘米 ， 这块 铁块 的 体积 = ？", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "16300", "content": "某市 2003 年 的 出口额 为 75 亿元 ， 比 2002 年 多 15 亿元 ， 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4799", "content": "一 列 火车 有 16 节车厢 ， 每 节车厢 有 102 个 座位 ， 这 列 火车 可以 坐 多少 位 旅客 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4541", "content": "一 列 客车 和 一列 货车 从 相距 750 千米 的 两地 同时 相对 开除 ， 客车 每 小时 行 80 千米 ， 货车 每 小时 行 70 千米 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1872", "content": "红花 有 60 朵 ， 黄花 比 红花 多 (1/6) 朵 ， 黄花 有 多少 朵 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11738", "content": "工程队 修 一条 路 ， 第一周 修 了 (1/5) ， 第 二 周 修 了 (3/10) ， 还 剩下 340 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6554", "content": "计算 ： 667 + 458 + 345 + 542 + 333 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "11709", "content": "计算 ： 19 * 0.125 + 281 * (1/8) + 12.5 = ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21897", "content": "植树节 那天 ， 老师 要求 每个 班 植树 65 棵 ， 则 9 个 班 共 植树 多少 棵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18437", "content": "同学 们 到 河边 种树 ， 河岸 长 56 米 ， 每隔 4 米 种 一棵树 ， 两端 都 要 种 ， 共 需要 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5079", "content": "甲乙 两辆 汽车 分别 从 南京 和 上海 同时 出发 ， 在 沪宁 高速公路 上 相对 而 行 ． 甲 车 每 小时 行 103 千米 ， 乙 车 每 小时 行 112 千米 ， 经过 1.2 小时 两车 还 相距 16.08 千米 ． 沪宁 高速公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12249", "content": "挖 一条 长 440 m 的 水渠 ， 甲 、 乙 两队 同时 从 两头 开始 挖 ， 甲队 每天 挖 24.5 m ， 乙 队 每天 挖 30.5 m ． 经过 多少 天 能 完成 挖 渠 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17419", "content": "小 明 去 书店 ， 买 了 一本 字典 用 15.6 元 ， 还 买 了 一本 《 少年 百科全书 》 ， 《 少年 百科全书 》 比 字典 贵 9.2 元 ， 小 明 买 书 共 花 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9806", "content": "校园 里 一共 有 60 棵 树 ， 其中 杨树 占 (1/3) ， 柳树 占 (1/4) ， 槐树 占 (1/5) ， 其余 的 是 樱花树 ， 樱花树 有 多少 颗 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4997", "content": "小 明 看 一 本书 ， 第一天 看 了 这 本书 的 20% ， 第 二 天 看 了 这 本书 的 (1/4) ， 结果 两天 看 了 72 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17960", "content": "有 一盒 围棋 ， 黑子 和 白子 混 在 了 一块 ， 黑 棋 和 白 棋 各 有 150 颗 ， 那么 从 中间 摸 出 白子 的 可能性 的 大小 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16478", "content": "修 一条 长 600 m 的 路 ， 第一天 修 了 总数 的 25% ， 第 二 天 修 了 总数 的 15% ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9689", "content": "三年级 有 女生 323 人 ， 男生 有 265 人 ， 把 这些 学生 平均 分成 6 个 班 ， 每个 班 有 多少 名 学生 ？ ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3030", "content": "一 袋 米 50 千克 ， 第一天 吃 了 (2/5) ， 第 二 天 吃 了 剩下 的 (1/4) ， 这 袋 米 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18636", "content": "5 （ 1 ） 班 同学 种 了 80 棵 向日葵 ， 估计 每棵 向日葵 能 收 葵花籽 1.25 千克 ， 如果 每千克 葵花籽 能 榨油 0.17 千克 ， 同学 们 收获 的 葵花籽 可以 榨油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7310", "content": "修 一条 公路 ， 第一天 修 全长 的 (1/6) ， 第 二 天 修 全长 的 (2/15) ， 还 剩下 全长 的 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17534", "content": "饮水 供应站 用 同样 的 汽车 装运 饮用水 ， 每辆车 装运 60 桶 ， 上午 运 了 20 车 ， 下午 多 运 3 车 ， 这天 一共 运 水 多少 桶 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18145", "content": "盐 与 水 的 质量 比 是 2 ： 13 ， 其中 盐 有 6 克 ， 一共 配制 多少 克 盐水 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4162", "content": "学校 买来 130 盒 粉笔 ， 每星期 用 8 盒 ， 用 了 5 个 星期 ， 还 剩 多少 盒 ？ ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9524", "content": "小张 的 爸爸 乘坐 一辆 出租车 从 家 去 某 邮电局 ， 该车 起步价 为 10 元 （ 0 - - 3 千米 ） ， 超过 起步价 每 增加 1 千米 要 按 每 千米 1.2 元 计算 ， 他 爸爸 共 付 了 40 元 ． 请 你 帮 他 算 一 算 ， 他家 到 邮电局 共有 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2880", "content": "学校 阅览室 里 有 72 名 学生 在 看书 ， 其中 女生 占 (4/9) ， 后来 又 有 几名 女生 来看 书 ， 这时 女生 人数 占 所有 看书 人数 的 (9/19) ， 问 后来 又 有 几名 女生 来看 书 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13280", "content": "一 个数 的 (4/15) 是 50 的 (2/5) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "442", "content": "一 盒 粉笔 共 40 支 ， 第一天 用 了 它 的 (1/8) ， 第 二 天 用 了 它 的 (3/10) ， 两天 一 共用 了 多少 支 粉笔 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15978", "content": "5 • 一班 45 名 同学 参加 植树 ， 其中 (2/5) 的 同学 负责 挖坑 ， 其余 的 同学 负责 植树 ， 植树 的 同学 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22807", "content": "一 段长 30 米 的 铁丝 ， 先剪 去 50% ， 再剪 去 (1/2) 米 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11015", "content": "甲 、 乙 两地 相距 54 千米 ， a 、 b 两 人 同时 从 两地 相向 而 行 ， a 每 小时 行 4 千米 ， b 每 小时 行 5 千米 ， 两 人 经过 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10598", "content": "一 辆 汽车 (3/5) 小时 行驶 30 千米 ， 行 1 千米 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22601", "content": "小 芳 给 小林 6 张 画片 后 ， 两 人 就 一样 我 ， 原来 小 芳 比 小林 多 多少 张 画片 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19858", "content": "甲乙 两个 修路 队 共同 修 一条 路 ， 修 了 15 天 后 ， 甲队 比 乙 队 少 修 120 米 ． 甲队 每天 修 65 米 ， 乙 队 每天 修 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1160", "content": "75 的 (1/3) - 15 个 (1/2) ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20966", "content": "6 / 4.5 与 2.7 的 和 所得 的 商 ， 再 乘 17.5 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10165", "content": "实验 小学 五年级 有 5 个 班 ， 每班 捐 30 盆花 ， 布置 花坛 用 去 了 若干 盆 后 还 剩 25 盆 ， 布置 花坛 用 去 多少 盆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17940", "content": "杨 叔叔 帮 粮站 运 大米 ， 每次 运 45 袋 ， 每 袋 大米 重 50 千克 ， 4 次 正好 运 完 ． 一共 运 了 多少 千克 大米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3141", "content": "电影院 里 有 1300 个 座位 ， 学校 有 28 个 班 ， 平均 每个 班 有 45 人 ， 有 多少 个 座位 空 着 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17857", "content": "运输队 运 一批 化肥 ， 第一天 运走 全部 化肥 的 40% ， 第 二 天 比 第一天 多 运 60 吨 ， 正好 运 完 ， 这 批 化肥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9351", "content": "粮店 原有 大米 248 包 ， 卖出 179 包 后 又 运进 132 包 ． 这个 粮店 现有 大米 多少 包 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19150", "content": "一 件 120 元 的 衣服 涨价 20% 后 的 价格 = 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12307", "content": "公共汽车 从 动物园 到 文化宫 ， 原来 沿途 有 9 个 站 （ 包括 起始 站 和 终点站 ） ， 平均 每 两个 站 相距 1200 米 ， 现在 根据 需要 ， 共 设 6 个 站 ， 现在 平均 每 两个 站 相距 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13878", "content": "一 辆 旅游车 1.2 小时 行驶 67.2 千米 ． 从 甲地 到 乙地 共 行驶 了 3.2 小时 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9968", "content": "李 大爷 十 月份 的 工资 是 1650 元 ， 另外 奖金 1100 元 ， 工资 和 奖金 总和 扣除 2500 元 之后 所 剩余 的 部分 按 5% 向 国家 缴纳 个人所得税 ． 你 能 帮 李 大爷 算 一 算 ， 他 应该 缴纳 多少 税款 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17398", "content": "58 千克 花生 可 榨油 29 千克 ， 照 这样 计算 ， 每千克 花生 可 榨油 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2617", "content": "多少 乘 28 等于 420 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13689", "content": "一 个 袋子 中 放 有 同样 规格 的 10 个 黄 球 ， 4 个 黑 球 ， 6 个 红球 ． 随意 从 袋子 中 摸 出 一个 球 ， 摸 出 是 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15872", "content": "计算 ： 99999 + 9999 + 999 + 99 + 9 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "11205", "content": "一 袋 大米 ， 第一周 吃 了 (2/5) ， 第 二 周 吃 了 (1/5) ， 还 剩 6 千克 ， 这 袋 大米 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7458", "content": "一 个数 减少 它 的 20% 后 是 64 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21020", "content": "计算 ： 75 * 4.7 + 15.9 * 25 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21747", "content": "妈妈 买 了 一些 奶糖 和 35 粒 水果糖 ， 如果 奶糖 吃掉 20 粒 ， 就 比 水果糖 少 5 粒 ， 妈妈 买 了 多少 粒 奶糖 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12292", "content": "压路机 的 滚筒 是 一个 底面 直径 为 1.5 米 ， 滚筒 的 长 为 2 米 的 圆柱体 ， 如果 压路机 每分钟 可以 滚动 10 周 ， 求 压路机 每分钟 压路 面积 = ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "14672", "content": "某 工厂 有 职工 500 人 ， 某 天 的 出勤率 是 98% ， 其中 出勤 女职工 占 出勤 职工 的 60% ， 这天 出勤 的 女职工 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "46", "content": "妈妈 有 3 米 蓝 带子 ， 12 米 红带子 ． 红带子 的 长 是 兰 带子 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11050", "content": "张 伟 参加 了 6 门 功课 的 考试 ， 英语 成绩 公布 前 ， 他 5 门 功课 的 平均分 时 92.2 分 ， 英语 成绩 公布 后 ， 平均分 下降 了 1.7 分 ， 张 伟 的 英语 成绩 考 了 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18698", "content": "(1/8) + (5/8) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13656", "content": "一 个 桥墩 水上 部分 高 36 米 ， 水中 部分 占 全长 的 15% ， 埋 在 泥 中 的 部分 占 全长 的 (1/4) ， 求 桥墩 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6193", "content": "滑雪场 里 有 65 个 女生 ， 男生 人数 比 女生 的 3 倍 少 27 人 ， 男生 有 几 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12753", "content": "学校 买来 8 个 书架 ， 每个 书架 有 5 层 ， 每层 可以 放 35 本书 ， 这些 书架 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5735", "content": "某 机器厂 计划 做 5250 个 零件 ， 前 4 天 每天 做 了 525 个 ， 剩下 的 零件 还要 做 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20679", "content": "青山 小学 有 女生 540 人 ， 男生 人数 比 女生 的 (5/6) 少 6 人 ， 学校 有 男生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8467", "content": "商店 有 3 箱 矿泉水 ， 每箱 24 瓶 ． 每瓶 1.8 元 ， 可 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10657", "content": "26 个 170 的 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5500", "content": "180 是 9 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12380", "content": "四年级 有 5 个 班 ， 每班 58 个人 ， 其中 女生 有 130 人 ． 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21929", "content": "李 村 修 一段 公路 ， 第一天 修 了 240 米 ， 还 剩下 全长 的 (1/4) ， 这 段 公路 长 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7676", "content": "一 个 比例 的 两个 内 项 的 积 是 12 ， 一个 外 项 是 (1/5) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22839", "content": "十 运 会上 ， 运动员 程 菲 跳马 成绩 是 9.467 分 ， 自由体操 的 成绩 比 跳马 多 0.35 分 ， 她 两项 共 得分 多少 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15295", "content": "7 年级 同学 集邮 ， 红红 收集 了 90 张 ， 比 明明 多 收集 了 20% ， 明明 又 比 兰兰 少 收集 了 25% ， 兰兰 收集 了 多少 张 邮票 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12449", "content": "一 堆 燃料 重 60 吨 ， 先 用 载重 3.5 吨 的 货车 运 8 次 ， 余下 的 再 用 载重 3.2 吨 的 货车 运 ， 还要 几次 才能 运 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9051", "content": "甲 、 乙 两 俩 汽车 从 两地 相对 开出 ， 当 甲 车行 了 全程 的 (4/5) ， 乙 车行 了 全程 的 (1/3) 时 ， 两车 相距 20 千米 ， 两地 的 距离 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "745", "content": "791 * 9 + 81 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19667", "content": "学校 体操队 在 训练 ， 每排 人数 相等 ， 小 刚 站 在 其中 一排 ， ， 从 前面 数起 是 第 6 名 ， 从 后面 数起 是 第 5 名 ． 这样 的 一排 有 学生 多少 名 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8393", "content": "某 数 增加 它 的 40% 后 是 84 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12289", "content": "要 粉刷 一面 长 72 米 ， 宽 3 米 的 墙面 ， 如果 每平方米 的 粉刷 费用 是 18 元 ， 那么 粉刷 这 面墙 要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9535", "content": "农场 要 收割 1300 公顷 小麦 ， 原 计划 每天 收割 60 公顷 ， 收割 5 天 后 改为 每天 收割 50 公顷 ， 还 需要 多少 天 才能 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5895", "content": "妈妈 买 了 白布 15 米 ， 买 的 花布 比 白布 多 (1/3) ． 买 的 花布 比 白布 多 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6508", "content": "希望 小学 招收 一年 级新生 12 个 班 ， 每个 班 招收 48 人 ， 一共 招收 一年 级新生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6928", "content": "一 条 绳子 ， 剪 去 全长 的 75% ， 还 剩下 12 米 ， 原来 绳子 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8644", "content": "学校 阅览室 有 360 名 学生 在 看书 ， 其中 女生 占 (4/9) ， 后来 又 来 了 若干名 女生 ， 这时 女生 人数 占 所有 人数 的 (9/19) ， 后来 又 来 了 多少 名 学生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19052", "content": "农场 有 小牛 40 头 ， 是 大 牛头 数 的 (5/6) ， 大 牛 和 小牛 一共 有 多少 头 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1774", "content": "幼儿园 买来 84 个 皮球 ， 小班 分 得 这些 球 的 (1/3) ， 中 班 分 得 24 个 ， 大 班 分 得 这些 皮球 的 几分 之 几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5814", "content": "姐妹 两 人 同时 从 相距 630 米 的 两地 相向 而 行 ， 妹妹 每分钟 走 60 米 ， 姐姐 每分钟 走 80 米 ， 经过 多少 分钟 姐妹 两 人 在 途中 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2270", "content": "小 红 3 分钟 跳绳 跳 了 306 下 ， 她 一分钟 约 跳 多少 下 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15268", "content": "一 批 水泥 90 吨 ， 第一次 运走 (1/5) ， 第 二 次 运走 它 的 (2/5) ， 两次 共 运走 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11266", "content": "一 件 衣服 先 提价 10% ， 再 打 0.9 出售 ， 这时 这件 衣服 的 价格 是 原价 的 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21096", "content": "工地 有 黄沙 (17/20) 吨 ， 上午 用 去 (1/4) ， 下午 用 去 (2/5) ， 还 剩下 这 堆 黄沙 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21628", "content": "甲 、 乙 两辆 汽车 分别 从 a 、 b 两地 出发 相对 而 行 ， 甲 车 先行 1 小时 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 50 千米 ， 5 小时 相遇 ， 求 a 、 b 两地 间 的 距离 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "575", "content": "一 次 数学 测验 ． 全班 36 人 中 ， 做 对 第一道 聪明 题 的 有 21 人 ， 做 对 第 二 道 聪明 题 的 有 18 人 ， 每人 至少 做 对 一道 题 ． 问 两道 都 做 对 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5702", "content": "仓库 有 20 吨 煤 ， 第一次 用 去 (1/5) ， 第 二 次 用 去 (1/2) 吨 ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10715", "content": "成都 到 北京 坐飞机 要 1.5 小时 ， 如果 飞机 平均 每 小时 飞行 800 千米 ， 成都 与 北京 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10804", "content": "一 件 商品 在 节日期间 打 0.8 出售 ， 这样 就 比 原来 便宜 了 84 元 ， 这件 商品 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2262", "content": "买 一件 上衣 180 元 ， 是 一副 手套 的 36 倍 ， 买 一件 上衣 和 一副 手套 一共 要 花 多少 元 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2864", "content": "甲 数 的 (3/5) 和 乙 数 的 62.5% 相等 ， 乙 数 是 240 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9879", "content": "3 千克 绿豆 可以 制 1 千克 粉丝 ． 照 这样 计算 ， 要 制 15.9 千克 粉丝 ， 需要 绿豆 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21938", "content": "阳光 大 课间 ， 操场上 跳 竹竿 舞 的 同学 有 35 人 ， 比 玩 滑板 的 人 多 (2/5) ， 玩 滑板 的 同学 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10873", "content": "笑笑 有 12 本 故事书 ， 是 淘气 的 故事书 的 本 数 的 (2/3) ， 淘气 有 多少 本 故事书 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "81", "content": "一 桶 油 ， 第一次 倒 出 37.5% ， 第 二 次 倒 出 剩下 的 40% ， 这时 还 剩下 30 千克 ， 这 桶 油 原有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21044", "content": "例 2 ： 水果店 运 来 一些 苹果 ， 第一天 卖 了 20% ， 第 二 天 卖 的 相当于 第一天 卖 的 150% ， 这时 还 剩 300 千克 ， 求 一共 运 来 多少 千克 苹果 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19233", "content": "如果 三角形 的 底 扩大 3 倍 ， 对应 的 高 扩大 2 倍 ， 则 面积 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19355", "content": "某 厂 女工 人数 是 男工 人数 的 80% ， 后来 又 调 15 名 女工 ， 这时 女工 比 男工 多 30% ， 这个 工厂 有 多少 男工 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5969", "content": "王老师 从 家 到 学校 有 975 米 ， 共 走 了 15 分 ． 他 用 同样 的 速度 ， 从 家 走 到 390 米处 的 少年宫 ， 要 走 多少 分 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2639", "content": "一 个数 比 它 的 (2/5) 多 12 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21198", "content": "小 明 读 一本 故事书 ， 第一天 读 了 全书 的 (4/15) ， 第 二 天 读 了 全书 的 (2/5) ， 两次 共 读 了 60 页 ， 这本 故事书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17519", "content": "现行 我国 居民 人民币 定期 储蓄 一年期 的 年利率 是 1.98% ， 利息税 是 20% ， 若 你 在 银行 存 了 2000 元 压岁钱 ， 一年 后 你 可 得 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "10417", "content": "一 个 箱子 里 装满 了 实心球 ， 连 箱子 共 重 12 千克 ． 从 箱 中 取出 实心球 的 (1/4) 后 ， 剩下 的 实心球 连 箱 共 重 9.5 千克 ． 箱子 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10533", "content": "一 瓶 油 ， 第一次 吃 去 (1/2) ， 第 二 次 吃 去 余下 的 (1/5) ， 这时 瓶内 还有 30 千克 ， 这 瓶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17121", "content": "在 一个 长 24 米 ， 宽 15 米 的 长方形 厂房 里 ， 放 了 30 台 同样 的 机器 ． 平均 每 台 机器 占地 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7909", "content": "比 一个 数多 425 的 数 是 1235 ， 这个 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11656", "content": "王 叔叔 把 40000 元 人民币 存入 银行 ， 定期 2 年 ， 年利率 （ 每 一年 的 利率 ） 是 2.7% ． 到期 时 ， 王 叔叔 应得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20144", "content": "甲 、 乙 两辆 汽车 分别 从 a 城 和 b 城 同时 相对 开出 ． 甲 车 每 小时 行 42 千米 ， 乙 车 每 小时 行 58 千米 ． 5 小时 后 两车 相遇 ． a 城 到 b 城 一共 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20347", "content": "把 甲 仓 存粮 的 (1/10) 调入 乙 仓 ， 则 两个 仓库 存粮 吨数 相等 ， 那么 乙 仓 原来 的 存粮 是 甲 仓 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1559", "content": "某 车间 要 生产 一批 彩电 ， 原 计划 每天 生产 50 台 ， 12 天 完成 任务 ． 实际 每天 生产 60 台 ， 实际 多少 天 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9769", "content": "计算 ： [ (3/5) + (2/5) * ( 1 - (3/8) ) ] * 20 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "861", "content": "小 新 看 一 本书 ， 第一天 看 了 全书 的 40% ． 第 二 天 看 了 余下 的 (5/9) ， 两天 正好 看 了 121 页 ， 全书 共有 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10538", "content": "文具店 卖出 18 盒 橡皮 ， 每盒 12 块 ， 每块 0.75 元 ， 一共 售 得 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6544", "content": "在 学校 举行 的 跳高 比赛 中 ， 小 明 跳 了 0.74 米 ， 比 小 红 高 0.13 米 ， 小 军 又 比 小 红 高 0.36 米 ． 小 军 跳 了 多 高 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22771", "content": "如果 滚 一个 大 雪球 需要 7.8 分钟 ， 滚 了 一模一样 的 大 雪球 4 个 ， 共 需要 几分钟 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21574", "content": "水果店 运 来 苹果 27 筐 ， 梨 15 筐 ， 共 重 1284 千克 ； 已知 每 筐 梨 重 28 千克 ， 每 筐 苹果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16266", "content": "一 个 平行四边形 的 高 是 4.8 厘米 ， 相邻 的 两条 边 分别 是 4 厘米 ， 6 厘米 ， 平行四边形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14689", "content": "运输队 去 仓库 运 水泥 ， 第一天 运出 总数 的 (1/5) ， 第 二 天 运进 水泥 36 吨 ， 这时 仓库 里 的 水泥 是 原来 的 87.5% ， 仓库 里 原有 水泥 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11642", "content": "8 千克 面粉 ， 吃掉 了 它 的 (7/16) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13313", "content": "阳阳 的 体重 比 付款 航 重 5 千克 ， 佳 航 的 体重 比 阳阳 轻 (1/7) ， 阳阳 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22005", "content": "将 10 条 短绳 依次 结成 一条 长绳 ， 需要 打 多少 个 结 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14803", "content": "甲 、 乙 两地 相距 360 千米 ， 一列 火车 上午 8 时 从 甲地 出发 ， 上午 11 时 到达 乙地 ． 这 列 火车 均 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8722", "content": "小 红 看 一本 故事书 ， 8 天 看 了 128 页 ． 照 这样 又 看 了 4 天 全部 看 完 ， 这本 故事书 有 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "544", "content": "一 个 直角三角形 3 边 长度 分别 为 6 cm 、 10 cm 和 8 cm ， 这个 直角三角形 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19942", "content": "甲 数 是 49 ， 比 乙 数多 (1/7) ， 乙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4698", "content": "学校 买 了 4 个 篮球 和 6 个 排球 ， 一 共用 去 620 元 ． 每个 篮球 80 元 ， 每个 排球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15197", "content": "一 个数 ， 减去 它 的 20% ， 再 加上 5 ， 还 比 原来 小 3 ． 那么 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16753", "content": "一 桶 油 用 去 (5/8) ， 又 加进 7 千克 ， 这时 桶 里 的 油 正好 是 这 桶 油 的 (1/2) ． 这 桶 油 一共 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18485", "content": "某 天 早上 的 气温 是 15.2 摄氏度 ， 中午 升高 了 7.4 摄氏度 ， 晚上 又 比 中午 降低 了 6.8 摄氏度 ． 这天 晚上 的 气温 = 多少 摄氏度 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17462", "content": "小 芳 看 一 本书 ， 每天 看 5 页 ， 9 天 后 还 剩 56 页 ， 这 本书 一共 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14590", "content": "红 黄 两盒 小 棒 ， 红 盒里 比 蓝 盒里 多 5 根 ， 从 红 盒子 里 拿出 1 根 放进 蓝 盒子 里 后 ， 红 盒子 里 的 小 棒 比 蓝 盒子 里 的 多 几根 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9798", "content": "李 明 排 在 队伍 中 ， 他 前面 有 5 个 小朋友 ， 排 在 他 后面 的 人数 是 前面 人数 的 2 倍 ． 这 一排 队伍 共 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5900", "content": "一 个数 除以 2 ， 除以 5 ， 除以 11 都 余 1 ， 这个 数 最小 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15943", "content": "解放军 叔叔 列队 ， 如果 每排 16 人 ， 要 排成 12 排 ； 如果 每排 6 人 ， 要 排 多少 排 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8847", "content": "某班 在 一次 检测 中 ， 有 2 名 学生 不及格 ， 及格率 是 95% ， 该班 共有 学生 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "468", "content": "4 / 2.1 的 商 再 加上 3.6 与 2.5 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13090", "content": "5 个 自然数 的 平均数 是 68 ， 若 其中 一个 数 增加 20% ， 则 平均数 变为 70 ， 增加 的 那个 数 原来 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "686", "content": "一 口 井 深 8 米 ， 一只 蜗牛 从 最 底下 开始 往上爬 ， 白天 爬 上 3 米 ， 夜里 滑 下 2 米 ， 这样 它 多少 天 能 爬 到 井口 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15894", "content": "学校 买 了 一批 电教 设备 ， 其中 电脑 5 台 和 彩电 8 台 共用 去 46950 元 ， 其中 每 台 彩电 2450 元 ， 每 台 电脑 要 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14905", "content": "学校 里 有 松树 38 棵 ， 杨树 比 松树 多 23 棵 ， 柳树 的 棵 树 是 松树 和 杨树 总 棵 树 的 2 倍 ． 柳树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18910", "content": "一 列 火车 长 8.5 米 ， 宽 3 米 ， 高 2.4 米 ， 装 煤 每 立方米 重 1.4 吨 ， 求 一共 可以 装 多少 吨 煤 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "18823", "content": "甲乙 两列 火车 从 相距 1085 千米 的 两地 相对 开出 ， 经过 3.5 小时 后 两车 相遇 ． 甲 车 每 小时 行 118 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13534", "content": "学校 买来 8 个 足球 和 60 根 跳绳 ， 共用 去 730 元 ， 每 根 跳绳 1.5 元 ， 每个 足球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22190", "content": "一 根 长 (7/8) 米 长 的 铁丝 ， 第一次 用 去 全长 的 (1/8) ， 第一次 用 去 全长 的 (1/6) ． 还 剩下 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16255", "content": "82 个 0.125 的 和 除以 2.5 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1337", "content": "男生 比 女生 多 60% ， 女生 比 男生 少 多少 % ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8212", "content": "一 辆车 3 小时 行驶 180 千米 ， 照 这样 的 速度 计算 ， 这辆 汽车 从 甲 城 到 乙 城 共 需 6 小时 ， 甲 、 乙 两城 的 距离 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13248", "content": "5 （ 1 ） 班 学习 美术 的 学生 有 14 人 ， 是 学习 书法 的 学生 的 (2/7) ， 学习 书法 的 比 学习 美术 的 多 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6343", "content": "妈妈 的 体重 是 45 千克 ， 是 爸爸 体重 的 60% ， 小 明 的 体重 又 是 爸爸 的 (7/15) ． 小 明 的 体重 = 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16413", "content": "一 块 地 的 面积 约 (3/4) 公顷 ， 其中 (1/4) 的 种 玫瑰花 ， (2/5) 种 郁金香 ， 其余部分 种 杜鹃花 ， 种 杜鹃花 的 面积 占 总面积 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12909", "content": "10 个 小朋友 排成 一队 去 看 电影 ， 从 前面 数起 ， 小 华 是 第 5 个 ， 从 后面 数起 ， 小 华 是 第 多少 个 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11937", "content": "一 桶 油 ， 用 去 18 千克 后 ， 还 剩下 (2/5) ． 这 桶 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "78", "content": "一 个 运输队 承包 运输 1998 套 玻璃 茶具 ． 运输 合同规定 ： 每套 茶具 运费 1.6 元 ， 每 损坏 一套 茶具 ， 不仅 不得 运费 ， 还要 从 总 费 中 扣除 赔偿费 18 元 ． 结果 这个 运输队 实际 得到 运费 3059.6 元 ， 那么 ， 在 运输 过程 中 一共 损坏 了 多少 套 茶具 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17559", "content": "张家 镇 中心小学 距离 县城 48 千米 ， 其中 一部分 是 上坡路 ， 其余 是 下坡路 ． 张 校长 骑 自行车 从 学校 到 县城 ， 去 时 用 了 4.2 小时 ， 返回 时 用 了 3.8 小时 ． 已知 张 校长 骑 自 车上 坡 每 小时 行 10 千米 ， 则 他 骑 自行车 下坡 每 小时 行 多少 千米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5680", "content": "(4/5) + (1/3) 的 和 除 5 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19484", "content": "甲 居委会 为 灾区 捐 棉衣 240 件 ， 比 乙 居委会 多 捐 了 20% ， 比 乙 居委会 多 捐 棉衣 多少 件 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13102", "content": "吴 大爷 服用 高血压 药 ， 一共 120 片 ， 每日 服 3 次 ， 每次 2 片 ， 请问 这 瓶 药 可以 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19546", "content": "新华书店 运 来 400 本 儿童 故事书 ， 第一天 卖 了 20% ， 第 二 天 卖 的 相当于 第一天 卖 的 150% ， 书店 还 剩 多少 本书 没有 卖 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "22569", "content": "办公室 买来 一包 纸 ， 计划 每天 用 20 张 ， 可以 用 28 天 ． 由于 注意 节约 ， 实际 每天 只用 16 张 ， 实际 用 了 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10182", "content": "修路 队 修路 ， 上午 修 了 (5/8) 千米 ， 下午 修 的 是 上午 的 (3/4) ， 这 一天 共 修 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3978", "content": "师徒 两 人 加工 一批 零件 ， 徒弟 每 小时 加工 16 个 ， 是 师傅 的 (2/5) ， 完成 任务 时 ， 师傅 比 徒弟 多 加工 12 个 ， 这 批 零件 共 几个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6874", "content": "用 每千克 5.1 元 的 水果糖 10 千克 ， 用 每千克 7.8 元 的 奶糖 15 千克 ， 用 每千克 6 元 的 酥糖 5 千克 混合 成 什锦糖 ． 这种 什锦糖 的 单价 = 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "11055", "content": "青海 地震 后 ， 某 集团公司 捐赠 了 1000 顶 帐篷 ， 第一次 运 去 384 顶 ， 第 二 次 运 去 366 顶 ， 还有 多少 顶 没 运 去 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18757", "content": "校园 里 有 杨树 20 棵 ， 柳树 是 杨树 的 (9/10) ， 柳树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21527", "content": "一 个 圆柱 的 侧面 展开 图 是 一个 正方形 ． 已知 这个 圆柱 的 底面 周长 是 6 厘米 ， 它 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12747", "content": "一 个数 扩大 100 倍 ， 再 缩小 1000 倍 ， 结果 是 65.7 ， 这个 数 原来 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22372", "content": "水果店 运 来 36 筐 水果 ． 其中 运 来 的 苹果 是 总数 的 (5/12) ， 又 是 运 来 香蕉 的 (3/4) ， 水果店 运 来 多少 筐 香蕉 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11262", "content": "学校 手工 小组 有 女生 18 人 ， 男生 人数 是 女生 的 (2/9) ， 手工 小组 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1024", "content": "102 - 32 个 0.25 ， 所得 的 差 再 除以 47 ， 结果 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19137", "content": "停车场 有 大客车 32 辆 ， 比 小轿车 多 20 辆 ， 小轿车 有 多少 辆 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3732", "content": "学校 买 了 2 张 桌子 和 5 把 椅子 ， 共用 195 元 ． 已知 每张 桌子 35 元 ， 求 每 把 椅子 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4399", "content": "5 一 黄金周 ， 大象 游乐场 第一天 的 门票 收入 为 960 元 ， 第 二 天 比 第一天 增加 了 (1/6) ， 这 两天 的 门票 收入 一共 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7255", "content": "小 明 14 时 从 家 出发 ， 步行 速度 是 78 米 / 分 ， 经过 15 分钟 走 到 了 学校 ． 小 明 家 离 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10008", "content": "有 14 个 集装箱 ， 每个 重 2 吨 ， 要 用 载重量 是 4 吨 的 大卡车 一次 运走 ， 至少 需要 多少 辆 大卡车 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11687", "content": "学校 5 月份 计划 用电 480 度 ， 实际 少 用 60 度 ． 实际 用电 节省 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2369", "content": "林场 今年 种 杨树 3000 棵 ， 比 去年 多种 (1/5) ． 林场 去年 种 杨树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19369", "content": "甲 数 是 12 ， 乙 数 比 甲 数多 (1/3) ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20861", "content": "希望 小学 共有 25 个 中队 ， 每个 中队 又 分成 4 个 小队 ． 全校 共有 少先队员 1200 人 ， 平均 每个 小队 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6116", "content": "时 新 手表 厂 原 计划 每天 生产 75 块 手表 ， 12 天 完成 任务 ． 实际 比 计划 每天 多 生产 15 块 ， 实际 多少 天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18260", "content": "明明 买 图画 本 用 去 了 2.5 元 ， 他 现在 还 剩 3 元 钱 ， 他 原来 有 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22580", "content": "梅花鹿 的 体重 是 46 千克 ， 大象 的 体重 比 它 的 42 倍 少 16 千克 ， 大象 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11567", "content": "a ． b 两桶 油 ， a 桶 油 重 15 千克 ， 如果 倒 8 千克 给 b 桶 ， 则 b 就是 a 的 4 倍 ， b 桶 原来 有 油 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21515", "content": "一 条 绳子 ， 剪 去 全长 的 60% ， 还 剩下 12 米 ， 原来 绳子 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14442", "content": "唐僧 、 孙悟空 等 师徒 4 人 去 西天 取经 ， 路过 一处 桃园 ， 桃园 的 主人 一共 摘 了 24 个 桃子 款待 他们 ， 孙悟空 前去 探路 ， 先 吃 了 其中 的 (1/3) ， 唐僧 吃 的 比较 少 ， 只 吃 了 孙悟空 的 (1/2) ， 唐僧 吃 了 多少 个 桃子 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3618", "content": "有 两根 绳子 ， 白 绳 的 长度 比 红 绳 的 4 倍 少 2 米 ， 如果 白 绳 长 18 米 ， 红 绳 长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7742", "content": "396 / 4 的 商 = 多少 位数 ， 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16936", "content": "甲 、 乙 两地 相距 196 千米 ， 一辆 汽车 从 甲地 到 乙地 走 了 4 小时 ， 还 剩 56 千米 ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "577", "content": "老年 舞蹈队 需要 80 人 ， 原来 有 36 人 ， 又 有 24 人 报名 参加 了 ， 还 需要 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6281", "content": "在 知识 竞赛 中 ， 有 10 道 判断题 ， 评分 规定 ： 每 答对 一 题 得 2 分 ， 答错 或 不 答 一 题 要 倒扣 1 分 ． 小 明 只得 了 14 分 ， 他 答对 了 多少 道 题 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19024", "content": "已知 甲 数 是 乙 数 的 (2/3) ， 乙 数 是 甲 数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12408", "content": "笑笑 读 一本 科普 小说 ， 开始 8 天 读 了 这 本书 的 (3/7) ， 后来 加快 了 速度 ， 又 用 6 天 的 时间 读完 了 剩下 的 160 页 ， 笑笑 平均 每天 读 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5961", "content": "两堆 水泥 ， 甲 堆 有 280 吨 ， 乙 堆 有 245 吨 ． 每天 从 甲 堆 运走 18 吨 ， 从 乙 堆 运走 11 吨 ． 几天 后 两堆 剩下 的 重量 相等 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18694", "content": "两辆 汽车 同时 从 a 地 开往 b 地 ， 甲 汽车 每 小时 行 80 千米 ， 乙 汽车 每 小时 行 120 千米 ． 当 乙 汽车 比 甲 汽车 多行 200 千米 时 ， 甲 汽车 正好 行 了 全程 的 40% ． 问 a 地 到 b 地 的 路程 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5627", "content": "保险公司 开展 私人 保险业务 ， 假如 年 保险费 按 投保 金额 的 5% 计算 ， 王先生 私人 财产保险 总金额 为 12 万元 ， 王先生 一年 需 交 私人 财产 保险费 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22972", "content": "一 辆 卡车 每次 运货 5 吨 ． 18 辆 这样 的 卡车 运 720 吨 货物 ， 需要 运 多少 次 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12167", "content": "5 、 二 班 共有 学生 40 人 ， 去年 检查 体育 达标率 为 90% ， 今年 检查 体育 达标率 为 95% ． 从 去年 到 今年 ， 体育 达标 的 学生 增加 了 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12475", "content": "盒子 里 装有 2 个 红球 ， 4 个 黄 球 ， 3 个 白 球 ， 摸 到 红球 的 可能性 = ， 摸 到 多少 球 的 可能性 最大 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9168", "content": "534 是 一个 数 的 6 倍 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14000", "content": "甲 数 的 25% 与 乙 数 的 30% 相等 ， 甲 数 是 120 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7493", "content": "3 辆 汽车 7 天 节约 汽油 33.6 千克 ， 照 这样 计算 ， 每辆 汽车 平均 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18999", "content": "某 汽车 制造厂 计划 今年 第一季度 生产 15000 辆 轿车 ， 但 实际 生产 的 轿车 数量 比 计划 增加 了 (1/4) ， 那么 汽车 制造厂 今年 第一季度 实际 生产 了 多少 辆 轿车 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1598", "content": "新华 农场 第一天 收割 麦田 10.5 公顷 ， 第 二 天 比 第一天 多 收割 40% ， 两天 一共 收割 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18427", "content": "某校 在 全市 “ 小红花 ” 数学 竞赛 中 ， 获奖 人数 占 全校 参赛 人数 的 (1/4) ， 其中 男生 有 12 人 获奖 ， 获奖 男生 人数 占 男女生 总 人数 的 (4/7) ， 这个 学校 有 多少 名 同学 参赛 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16226", "content": "一 个 平行四边形 的 面积 是 48 平方厘米 ， 高 是 6 厘米 ， 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7506", "content": "学校 买来 160 个 毽子 ， 分给 8 个 班 ， 每个 班 有 4 组 ， 每组 能 分 得 多少 个 毽子 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10346", "content": "上海 要 一条 公路 ， 已 建成 70 千米 ， 剩下 的 比 建成 的 4 倍 少 20 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22608", "content": "山前 村 计划 造林 200 公顷 ， 实际 造林 250 公顷 ， 实际 造林 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20295", "content": "客车 和 货车 同时 从 两地 相对 开出 ， 9 小时 相遇 ， 相遇 时 客车 正好 行 了 全程 的 60% ， 客车 每 小时 比 货车 快 15 千米 ， 两地 的 距离 = 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17106", "content": "实验 小学 五年级 有 120 人 参加 运动会 ， 六年级 参加 运动会 的 人数 比 五年级 多 15% ， 六年级 有 多少 人 参加 运动会 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "563", "content": "210 个 同学 分 两批 去 看 电影 ， 第一批 分成 4 个 小组 ， 第 二 批 分成 3 个 小组 ， 每组 人数 相等 ， 第一批 去 了 多少 个 同学 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17986", "content": "0.816 / 0.96 的 商 ， 再 乘以 5.06 ， 积 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17490", "content": "学校 买来 690 本书 ， 平均 分给 3 个 年级 ， 每个 年级 有 5 个 班级 ， 平均 每个 班级 分 到 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19979", "content": "一 个 密封 的 箱子 里 装有 红球 4 个 ， 黄 球 5 个 ， 白 球 7 个 ， 小林 伸手 任意 抓 了 一个 球 ， 抓 到 红球 的 机会 是 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18159", "content": "农贸市场 要 运进 一批 水果 ， 第一次 运进 总量 的 25% ， 第 二 次 运进 16 吨 ， 两次 共 运进 这 批 水果 的 65% ． 这 批 水果 一共 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5112", "content": "妈妈 存 3000 元 钱 到 银行 ， 定期 一年 ， 年利率 3.5% ． 实际 取得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17155", "content": "北京 到 呼和浩特 的 铁路线 长 660 千米 ， 一列 火车 从 呼和浩特 开出 ， 每 小时 行驶 48 千米 ； 另 一列 火车 从 北京 开出 ， 每 小时 行驶 72 千米 ． 两列 火车 同时 开出 ， 相向 而 行 ， 经过 几时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14997", "content": "小 华 看 一 本书 ， 已经 看 了 全书 的 (7/9) ， 还 剩 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21358", "content": "一 列 火车 2 小时 行 了 320 千米 ， 3 小时 行 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14050", "content": "星 华 小学 去 秋游 ， 六年级 共有 248 名 学生 ， 需要 8 辆车 ． 星 华 小学 共有 学生 930 人 ， 如果 都 租 这样 的 车 ， 需要 多少 辆车 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15759", "content": "爸爸 的 手机卡 中 有 一定 数额 的 钱 ， 如果 每天 消费 6 元 ， 能 使用 18 天 ． 如果 每天 节约 1.5 元 ， 这 张 储值卡 可以 使用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4441", "content": "一 位 汽车 驾驶员 一天 节约 汽油 3.22 升 ， 已知 汽车 行驶 10 千米 用 汽油 1.4 升 ， 照 这样 计算 ， 一天 节约 的 汽油 能 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20042", "content": "小 明 骑车 上学 ， 计划 每 分行 300 米 ， 12 分 到校 ， 如果 要 提前 2 分 到校 ， 每分钟 要 行 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7430", "content": "从 甲地 去 乙地 ， 如果 速度 提高 (2/7) ， 那么 时间 将 缩短 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3493", "content": "红星 小学 五年级 有 3 个 班 ， 平均 每班 45 人 ， 在 为 灾区 小朋友 献爱心 的 活动 中 五年级 学生 共 捐款 472.5 元 ， 平均 每人 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18893", "content": "小 王 步行 到 县城 去 ， 每分钟 行 80 米 ， 5 分钟 后 老王 发现 小 王 忘 了 带 文件 ， 立即 骑车去 追 小 王 ， 2 分钟 后 追 上 ， 求 老王 骑车 的 速度 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20843", "content": "3.7 与 0.38 的 和 去除 4.6 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1116", "content": "南京 到 武汉 的 航道 长 大约 840 千米 ． 两艘 轮船 同时 从 两地 相对 开出 ， 武汉 开出 的 轮船 每 小时 行 26 千米 ， 南京 开出 的 轮船 每 小时 行 16 千米 ． 经过 多少 小时 两艘 轮船 在 途中 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4166", "content": "1 吨 的 (4/7) 与 多少 吨 的 (1/7) 同样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17085", "content": "一 个数 的 (2/3) 是 50 ， 它 的 (7/15) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20959", "content": "一 个 修路 队 要 修路 816 米 ， 已经 修 了 276 米 ， 剩下 的 如果 每天 修 60 米 ， 还要 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6394", "content": "妈妈 带 了 100 元 去 商场 买 衣服 ， 买 上衣 用 去 38.5 元 ， 买 牛仔裤 用 去 58 元 ， 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14108", "content": "一 条 绳子 长 20 米 ， 截去 它 的 (3/4) ， 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19200", "content": "车站 有 96000 吨 煤 需要 运往 外地 ， 一列 火车 有 20 节车厢 ， 每 节车厢 可 装 煤 60 吨 ， 运 完 这 批 煤 需要 多少 列 这样 的 火车 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12689", "content": "20 - 0.8 的 差 除以 4 个 0.3 的 和 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3477", "content": "12 个 班 的 学生 去 春游 ， 平均 每班 有 45 人 ． 一共 有 9 辆 大客车 ． 平均 每辆 大客车 要 坐 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13553", "content": "培 信 小学 的 学生 参加 少年宫 的 兴趣班 ， 有 54 名 女生 参加 文艺 小组 ， 女生 的 人数 是 男生 的 2 倍 ． 参加 文艺 小组 的 学生 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6157", "content": "电影院 的 一楼 有 座位 32 排 ， 每排 有 34 个 座位 ， 二 楼 有 480 个 座位 ． 这个 电影院 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21326", "content": "水果店 上午 卖出 水果 (5/8) 吨 ， 下午 比 上午 卖出 (1/10) 吨 ， 一共 卖出 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4212", "content": "7.8 * 11 与 89 的 和 ， 再 减去 609 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22998", "content": "一 杯 饮料 喝 了 它 的 (3/4) ， 还 剩 多少 没有 喝 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22933", "content": "某 食堂 新 买 了 7 桶 油 ， 且 每桶 油 中 各 拿出 40 千克 油 ， 则 剩下 的 油 只有 原来 3 桶 那么 多 ． 请问 ， 原来 每桶 油 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2879", "content": "一 列 火车 ， 提速 前 平均 每 小时 行驶 71 千米 ， 从 秦皇岛 到 邯郸 用 12 小时 ， 提速 后 平均 每 小时 行驶 95 千米 ， 提速 后 从 秦皇岛 开往 邯郸 大约 需要 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7809", "content": "一 种 商品 售价 396 元 ， 比 原价 便宜 24 元 ， 降价 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9648", "content": "两个 码头 相距 432 千米 ， 轮船 顺水 行 这 段 路程 要 16 小时 ， 逆水 每 小时 比 顺水 少 行 9 千米 ， 逆水 比 顺水 多用 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13504", "content": "红星 工厂 存 煤 160 吨 ， 原来 每天 烧 1.5 吨 ， 烧 了 20 天 后 ， 因 采用 节煤 措施 ， 每天 只 烧 了 1.3 吨 ． 剩下 的 煤 还 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17831", "content": "一 个 长方体 形状 的 汽油桶 ， 底 面积 是 18 平方分米 ， 高 是 6 分 米 ， 如果 1 升 汽油 重 0.75 千克 ， 则 这个 汽油桶 最 多 可以 装 多少 千克 汽油 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15435", "content": "三年级 的 同学 乘 4 辆 汽车 去 春游 ， 前 3 辆车 各 坐 78 个 同学 ， 第 4 辆车 坐 66 人 ， 这次 春游 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7638", "content": "学校 准备 粉刷 办公室 ， 粉刷 的 面积 是 80 平方米 ， 一般 每平方米 用 涂料 0.84 千克 ， 但 在 实际 粉刷 时会 有 损耗 ， 因此 要 多 准备 (1/10) ． 实际 应 准备 多少 涂料 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21207", "content": "买 1 只 书包 和 4 本 练习本 ， 共 花 了 28.2 元 ． 其中 书包 每 只 25 元 ， 练习本 每 本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1369", "content": "用 0 、 1 、 2 、 3 、 4 这 5 个 数字 可以 组成 多少 个 不同 的 3 位数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12120", "content": "养鸡场 有 300 只 公鸡 ， 母鸡 的 只 数 是 公鸡 的 (17/3) 倍 ， 养鸡场 一共 有 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6263", "content": "小强 铅笔 枝 数 的 (1/4) 是 6 枝 ． 小强 有 铅笔 多少 枝 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21399", "content": "冷库 储存 水果 ， 储存 苹果 2000 箱 ， 占 水果 总数 的 (2/5) ， 储存 桔子 占 总数 的 (1/4) ， 储存 的 桔子 有 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15669", "content": "16 名 同学 排成 一队 做操 ， 每 两 人 之间 相隔 2 米 ． 第一名 同学 与 最后 一名 同学 之间 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14241", "content": "工厂 现在 每天 制造 机器 零件 6600 个 ， 比 原来 每天 制造 机器 零件 多 10% ． 原来 每天 制造 机器 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9713", "content": "一 辆 货车 从 县城 出发 ， 送 教科书 到 温泉乡 ， 每 小时 行 42 千米 ， 3 小时 到达 ， 返回 时 由于 是 空车 ， 每 小时 比 去 时 多行 21 千米 ． 这辆 货车 返回 县城 时 用 了 多少 时间 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8296", "content": "比 5 千克 少 (1/5) 千克 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7874", "content": "贝 贝 在 新华书店 买 了 一套 《 少儿 百科全书 》 ， 共 4 本 ， 付 了 100 元 ， 找回 28 元 ． 每 本 《 少年 百科全书 》 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11337", "content": "小张 以 1 元 钱 买 3 个 练习本 的 价格 买进 练习本 若干个 ． 又 以 2 元 5 个 练习本 的 价格 将 这些 练习本 卖出 ． 如果 要 赚 得 10 元 钱 的 利润 ， 他 必须 卖出 多少 个 练习本 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1350", "content": "某村 去年 种 花生 4000 平方米 ， 今年 比 去年 多种 (1/8) ， 今年 比 去年 多种 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6339", "content": "学校 数学 兴趣小组 有 男生 和 女生 共 36 人 ， 其中 男生 占 (5/9) ， 后来 又 有 男生 参加 ， 现在 男生 人数 和 女生 人数 的 比 是 2 ： 1 ． 现在 数学 兴趣小组 共有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19495", "content": "水果 店里 有 苹果 300 千克 ， 运 来 的 雪梨 比 苹果 少 (2/5) ， 运 来 雪梨 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4343", "content": "一 个 文具盒 16.70 元 ， 一盒 水彩笔 25.80 元 ． 用 50 元 买 一个 文具盒 和 一盒 水彩笔 ， 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16037", "content": "甲 、 乙 两 人 要 加工 770 零件 ， 甲 每 小时 加工 50 个 ， 乙 每 小时 加工 40 个 ， 甲 先 加工 了 1 小时 乙 才 参加 进来 ， 完工 时 甲 加工 了 几小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6775", "content": "星星 幼儿园 每天 运 来 水果 6 箱 ， 每箱 10 千克 ． 一个月 按 21 天 计算 ， 运 来 水果 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5362", "content": "商店 运 来 600 千克 苹果 ， 草莓 比 运 来 的 苹果 的 3 倍 少 60 千克 ， 商店 运 来 的 草莓 有 多少 千克 ？ 列式 ： 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2705", "content": "一 袋 大米 20 千克 ， 第一周 吃 了 7 千克 ， 第 二 周 吃 了 这 袋 大米 的 (2/5) ， 还 剩下 这 袋 大米 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15592", "content": "某 菜场 上午 运进 大白菜 130 千克 ， 下午 运进 的 比 上午 的 2 倍 还 多 50 千克 ． 超市 上午 比 下午 少 运进 大白菜 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18140", "content": "一 个 学校 有 228 名 学生 去 旅游 ， 分成 4 辆 汽车 后 ， 还 剩下 76 人 没有 上车 ， 平均 每辆车 乘 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3925", "content": "一 杯 牛奶 ， 方方 喝 了 它 的 (2/5) ， 这 杯 牛奶 还 剩下 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3191", "content": "学生 问 李老师 今年 多少岁 ， 李老师 说 ： “ 把 我 的 年龄 数 加上 6 ， 除以 2 ， 减去 5 ， 再 乘 上 4 ， 是 44 岁 ． ” 李老师 今年 多少岁 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11647", "content": "小 刚 有 30 张 邮票 ， 小 军 的 张 数 比 小 刚 的 4 倍 少 10 张 ， 小 军 比 小 刚 多 多少 张 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3845", "content": "一 袋 大米 吃掉 40% 后 ， 还 剩 15 千克 ， 这 袋 大米 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3112", "content": "师徒 两 人 共同 做 一批 零件 ， 师傅 每 小时 做 20 个 零件 ， 是 徒弟 每 小时 做 零件 数 的 2 倍 ， 师徒 两 人 共同完成 一批 任务 用 了 3 小时 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14557", "content": "学校 买来 5 个 篮球 和 6 个 足球 ， 篮球 每个 32.4 元 ， 足球 每个 23.5 元 ， 学校 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "23162", "content": "一年级 和 二年级 学生 到 小精灵 剧场 看 木偶戏 ， 一年级 有 186 人 ， 二年级 有 235 人 ． 剧院 共有 500 个 座位 ， 还有 多少 个 空座位 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5568", "content": "小康 身高 1.42 米 ， 爸爸 比 小康 高 0.34 米 ， 小康 和 爸爸 身高 的 和 是 妈妈 身高 的 2 倍 ， 妈妈 的 身高 = ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7355", "content": "一 堆 煤 有 60 吨 ， 第一次 用 去 这 堆 煤 的 (2/5) ， 第 二 次 用 去 总数 的 (1/6) 吨 ， 两次 共用 去 多少 吨 煤 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3144", "content": "一 堆 煤 第一次 运走 它 的 (1/6) ， 第 二 次 运走 21 吨 ， 还 剩下 14 吨 ， 这 堆 煤 原有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22837", "content": "一 个 三角形 比 一个 与 它 等 底 等 高 的 平行四边形 的 面积 少 48 dm ^ 2 ， 已知 三角形 的 底 是 12 dm ， 高 = 多少 dm ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22501", "content": "102 与 68 的 差 的 23 倍 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8573", "content": "希望 小学 五年级 有 学生 120 人 ， 六年级 有 学生 135 人 ， 这 两个 年级 的 人数 占 全校 总 人数 的 (3/7) ， 全校 共有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17564", "content": "草原 上 有 黑 牛 144 头 ， 黑 牛 是 花 牛 的 3 倍 ， 而 黄牛 的 头数 又 是 花 牛 的 12 倍 ， 草原 上 有 黄牛 多少 头 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16966", "content": "甲 、 乙 两车 在 同一 地点 同 时间 追 前面 一个 人 ， 甲 速 21 m / s ， 乙 速 16 m / s ， 行人 速度 1 m / s ， 甲 追 上 用 了 72 s ， 乙 追 上 需 多久 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "10966", "content": "有 一堆 黄沙 ， 先 运走 18 吨 ， 剩下 的 用 7 辆车 运 完 ， 每 车运 6 吨 ， 这 堆 黄沙 共有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15035", "content": "一 架 钢琴 ， 降价 20% 后 ， 售价 是 4400 元 ． 这 架 钢琴 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7562", "content": "纺织厂 有 男工 178 人 ， 女工 316 人 ． 把 这些 工人 每 38 人 分成 一组 ， 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19097", "content": "科技园 上午 有 游客 952 人 ， 中午 有 373 人 离开 ， 下午 又 来 了 403 位 游客 ， 这时 园内 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20924", "content": "一 列 火车 有 9 节车厢 ， 每 节车厢 有 108 个 座位 ． 这 列 火车 一共 有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13558", "content": "某 工厂 4 月份 下半月 用水 5400 吨 ， 比 上 半月 节约 20% ， 上 半月 用水 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "951", "content": "甲乙 两站 相距 440 米 ， 一辆 大车 和 一辆 小车 从 两站 相对 开出 ， 大车 每 小时 行 35 千米 ， 小车 每 小时 行 45 千米 ， 一只 燕子 以 每 小时 50 千米 的 速度 和 大车 同时 出发 ， 向 小车 飞去 ， 遇到 小车 又 折回 向 大车 飞去 ， 遇到 大车 又 往回 飞 向 小车 ， 这样 一直 飞下去 ， 燕子 飞 了 多少 千米 两车 才 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10079", "content": "4.3 千克 苹果 售价 21.5 元 ， 2 千克 橙 售价 16 元 ． 橙 的 单价 是 苹果 单价 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6392", "content": "买 10 袋 大米 和 6 袋 面粉 一 共用 了 472 元 ． 每 袋 大米 28 元 ， 每 袋 面粉 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17817", "content": "“ 6 一 ” 期间 ， 衢州 某 商场 举行 0.85 的 促销 活动 ， 王 丽 买 了 一件 上衣 花 了 170 元 ， 这件 上衣 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7453", "content": "从 运动场 一端 到 另一端 全长 96 米 ， 从 一端 到 另一端 每隔 4 米 插 一面 小红旗 ， 一共 要 插 多少 面 小红旗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10806", "content": "时 新 手表 厂 原 计划 25 天 生产 1000 块 手表 ， 实际 每天 生产 了 50 块 ， 实际 比 计划 提前 几天 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7308", "content": "甲 乙丙 城 相距 263.2 千米 ， 一辆 客车 2.8 小时 行 完全 程 ， 一辆 货车 用 3.5 小时 行 完全 程 ． 客车 的 速度 比 货车 的 速度 快 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16529", "content": "一 个 平行四边形 的 底 长 18 厘米 ， 高 是 底 的 (1/2) ， 它 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3914", "content": "童话 书 4 本 ， 售价 26.8 元 ， 每 本 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "511", "content": "两地 相距 800 千米 ， 两车 同时 从 两地 相向 出发 ． 经过 10 小时 相遇 ， 货车 每 小时 行 36 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17963", "content": "一 个 布袋中 有 黑白 两种 颜色 的 球 ， 白色 球 有 16 个 ， 任意 摸 一个 恰好 是 白 球 的 可能性 是 (1/4) ， 则 黑 球 有 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22319", "content": "水果店 运 来 苹果 与 梨 共 4.8 吨 ， 苹果 的 重量 相当于 梨 的 (3/5) ， 梨 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14999", "content": "减数 是 120 ， 差 是 180 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1042", "content": "两个 因数 的 积 是 29.58 ， 其中 一个 因数 是 6.8 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15884", "content": "某班 50 人 进行 检查 ， 达标率 为 96% ， 未达标 的 人 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12388", "content": "共有 50 个 同学 参加 体育 活动 ， 其中 会 跳绳 与 不会 跳绳 的 人数 比 是 4 ： 1 ， 会 踢毽子 与 不会 踢毽子 的 比 是 3 ： 2 ， 两种 项目 都 会 的 有 25 个 同学 ， 两种 项目 都 不会 的 有 多少 个 同学 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "10925", "content": "一 个 钢铁厂 去年 生产 钢材 48 万吨 ， 今年 比 去年 增产 15% ， 今年 产 钢 多少 万吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2334", "content": "小兵 在 学校 为 支援灾区 举行 的 “ 爱心 义卖 ” 活动 中 ， 把 自己 心爱 的 《 格林童话 》 作为 义卖 商品 ， 原价 是 40 元 ， 义 卖价 比 原价 便宜 了 10 元 ， 他 的 义 卖价 是 原价 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3986", "content": "一 本书 打 0.85 便宜 了 9 元 钱 ， 这 本书 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17297", "content": "商店 运 来 苹果 3250 千克 ， 正好 是 运 来 的 梨 的 (5/6) ， 运 来 的 梨 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12502", "content": "农具厂 要 生产 2400 件 农具 ， 已 生产 了 6 天 ， 平均 每天 行 产 250 件 ， 剩下 的 3 天 完成 ， 平均 每天 比 原来 多 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2901", "content": "12 只 小 猴 分桃 ， 每人 分 到 5 只 ， 现在 又 来 了 几只 猴子 ， 大家 重新分配 ． 平均 每 只 猴子 分 到 4 只 桃子 ． 又 来 了 多少 只 猴子 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18634", "content": "一 台 抽水机 7 小时 可以 浇地 196 公顷 ， 照 这样 计算 ， 这 台 抽水机 要 浇 336 公顷 的 菜地 ， 要 用 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21004", "content": "甲 、 乙 、 丙 3 辆 汽车 运 一批 粮食 ， 甲 车运 全部 粮食 的 (1/3) ， 甲 车运 的 (3/5) 与 乙 车 的 (11/15) 相等 ， 剩下 5200 千克 由 丙 车运 ． 那么 这 批 粮食 共有 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2059", "content": "美丽 服装厂 计划 做 120 套 运动服 ， 每套 运动服 用布 4.8 米 ． 改进 裁剪 方法 后 ， 每套 节约 用布 0.3 米 ， 原来 用 的 布 现在 可 做 运动服 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21065", "content": "某 城市 修 地铁 ， 一期 工程 完成 全部 的 35% ， 二 期 工程 完成 了 全部 的 (2/5) ， 还 剩下 26 千米 没有 修 完 ． 该 城市 修 地铁 的 总长 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18289", "content": "一 个 足球 35.4 元 ， 一个 篮球 39.8 元 ， 王小明 用 100 元 买 一个 篮球 一 和 一个 足球 ， 售货员 阿姨 给 王小明 补 回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17563", "content": "展览馆 原有 426 人 参观 ， 走 了 121 人 ， 又 来 了 98 人 ， 展览馆 现有 多少 人 参观 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19301", "content": "人 的 血液 大约 占 体重 的 (1/13) ， 血液 里 大约 有 (2/3) 是 水 ． 王 壮 的 体重 是 39 千克 ， 他 的 血液 里 大约 含水 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13190", "content": "红 云 制衣厂 5 月份 生产 服装 20000 件 ， 比 原 计划 多 生产 了 4000 件 ． 实际 完成 了 原 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12140", "content": "光华 电视机厂 计划 15 天 生产 电视机 540 台 ， 实际 比 计划 提前 3 天 完成 任务 ， 实际 每天 生产 多少 台 电视机 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20310", "content": "某处 摆 着 甲 、 乙 两 盆花 ， 一群 蜜蜂 飞来 ， 在 甲 花 上 落 了 (1/4) ， 在 乙 花 上 落 了 (1/3) ． 假如 这 群 蜜蜂 中 再有 两 盆花 上 的 蜜蜂 之 差 的 3 倍 的 蜜蜂 落 在 花 上 ， 则 剩下 2 只 蜜蜂 ， 问 这 群 蜜蜂 共有 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6861", "content": "从 上海 到 武汉 的 水路 长 1200 千米 ， 一艘 客轮 从 上海 开往 武汉 港 ， 已经 行驶 了 全程 的 (3/4) ， 离 武汉 港 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "539", "content": "一 座 4 层 楼房 有 28 个 教室 ， 每个 教室 装 8 盏灯 ， 已经 装 好 了 128 盏 ， 还要 装 多少 盏灯 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4871", "content": "一 杯水 中 放入 10 克 糖 ， 再 加入 浓度 为 5% 的 糖水 200 克 ， 配成 浓度 为 2.5% 的 糖水 ， 原来 杯中 有 水 多少 克 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5607", "content": "粮店 装运 一批 面粉 ， 原 计划 用 每辆 装 24 袋 的 汽车 9 辆 15 次 可以 运 完 ， 现在 改用 每辆 可 装 30 袋 的 汽车 6 辆 来 运 ， 几次 可以 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14746", "content": "一 列 火车 长 360 米 ， 每秒 行 18 米 ． 全 车 通过 一座 长 90 米 的 大桥 ， 需要 多长时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13306", "content": "一 件 工作 ， 本月份 已经 完成 的 是 未 完成 的 (3/5) ， 那么 未 完成 的 是 本月 总 工作量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "536", "content": "小 明 买 2 本 集邮册 ， 每 本 14.5 元 ， 他 付给 售货员 50 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7669", "content": "甲班 人数 比 乙班 多 (1/4) ， 则 乙班 人数 比 甲班 少 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7675", "content": "宏村 小学 微机室 需要 换 120 台 电脑 ， 已 更换 完 78 台 ， 完成 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21814", "content": "8 辆 汽车 5 天 节约 汽油 50.4 千克 ， 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7148", "content": "王老师 要 打印 一份 20 页 的 稿件 ， 每页 26 行 ， 每行 28 个 字 ， 这份 稿件 有 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18416", "content": "学校 图书馆 有 图书 4500 本 ， 其中 科技 书 占 总 本 数 的 (4/9) ， 文艺 书 的 本 数 是 科技 书 的 (3/10) ， 求 学校 有 文艺 书 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2344", "content": "两个 数 相除 ， 商 是 8 ， 余数 是 16 ； 被除数 、 商 、 余数 的 和 是 490 ． 除数 = ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4631", "content": "昆山 实验 中学 的 图书 将 借给 24 个 班 ， 平均 每班 借 125 本 ， 结果 还 剩下 780 本 ． 学校 共有 图书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8263", "content": "一 块 锡 铁合金 里 约 含铁 60% ， 其中 锡 有 12 千克 ， 这块 合金 约 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5602", "content": "从 南京 到 上海 有 2 条 行走路线 ， 从 上海 到 南通 有 4 条 行走路线 ， 如果 从 南京 经 上海 到 南通 ， 有 几种 不同 的 行走路线 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17465", "content": "27 的 (5/18) 与 (2/3) 的 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4426", "content": "木箱 里 有 5 个 红球 和 4 个 黄 球 ， 它们 除 颜色 外 完全相同 ． 现在 从中 摸 出 1 个 球 ， 是 红色 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17412", "content": "一 台 电脑 进行 促销 ， 按 0.8 出售 ， 价钱 是 6000 元 ， 促销价 比 原价 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5397", "content": "一 把 椅子 售价 55 元 ， 一张 桌子 的 售价 比 椅子 贵 85 元 ， 一张 沙发 的 售价 相当于 一把 椅子 与 一张 桌子 之 和 的 2 倍 ， 一张 沙发 售价 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4388", "content": "一 堆 货 ， 甲 车 独 运 (1/2) 小时 完成 ， 乙 车 独 运 (1/3) 小时 完成 ， 两车 合 运 ， 多少 小时 可以 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7696", "content": "植物园 里 有 一个 平行四边形 的 玫瑰园 ， 量 得 玫瑰园 的 底 是 120 m ， 高 是 80 m ， 如果 每平方米 种 9 株 玫瑰 ， 这个 玫瑰园 一共 能 种 多少 株 玫瑰 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15543", "content": "有 两只 奶牛 ， 花奶牛 每天 产 牛奶 4.8 千克 ， 比 另一只 花 牛奶 少产 0.8 千克 ， 两只 奶牛 一天 共产 牛奶 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3761", "content": "一 桶 油 ， 连 桶 重 21 千克 ， 用 去 (1/3) 的 油 后 连 桶 重 15 千克 ， 桶 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20716", "content": "晓 光 这 学期 课堂 数学 作业 有 56 次 得 优秀 ， 离 自己 规定 的 目标 还 差 (1/9) ． 晓 光 给 自己 规定 的 得 优 目标 = 多少 次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2120", "content": "一 辆 汽车 运送 一批 物资 到 山区 ． 前 3 小时 共 行 105 千米 ， 后 5 小时 平均 每 小时 行 42 千米 ． 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17384", "content": "一 个数 的 40% 比 3.6 少 20% ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5270", "content": "一 袋 大米 50 千克 ， 第一周 吃掉 了 它 的 (1/4) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6235", "content": "一 台 抽水机 3.5 小时 可以 浇地 1.4 公顷 ， 这 台 抽水机 每 小时 可 浇地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3263", "content": "一 件 上衣 ， 现在 售价 240 元 ， 比 原来 上涨 了 20% ， 上涨 了 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18857", "content": "商店 出售 的 一种 电视机 比 原价 降价 (2/11) ， 正好 降低 了 640 元 ． 这种 电视机 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11815", "content": "小 明 按 每 段 40 厘米 的 要求 ， 把 一根 铁丝 剪 了 5 次 ， 正好 全部 剪成 同样 长 的 几段 ． 这根 铁丝 全长 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7680", "content": "一 个 长方体 的 长 、 宽 、 高 分别 是 4 cm 、 3 cm 、 2 cm ， 这个 长方体 的 棱 长 总和 = 多少 cm ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3722", "content": "甲 数 是 60 ， 乙 数 比 甲 数 的 (3/4) 多 4 ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15421", "content": "学校 举行 运动会 ， 参加 跑步 的 有 162 人 ， 参加 跳绳 的 有 18 人 ． 参加 跑步 的 人数 是 跳绳 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2249", "content": "一 列 客车 以 每 小时 120 千米 的 速度 从 甲 站 开往 乙 站 ， 同时 有 一列 货车 以 每 小时 100 千米 的 速度 从 乙 站 开往 甲 站 ， 经过 5 小时 两车 相遇 ． 甲乙 两站 间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17723", "content": "一 项 工程 ， 甲 单独 做 12 小时 完成 ， 乙 在 相同 时间 里 只能 完成 这项 工程 的 (4/5) ， 乙 单独 做 多少 小时 完成 全 工程 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10768", "content": "多少 增加 它 的 20% 是 6 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3423", "content": "草地 上 水牛 的 头数 是 总 牛 数 的 (3/5) ， 剩下 的 是 黄牛 ， 共有 30 头 ， 水牛 与 黄牛 共有 多少 头 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7855", "content": "小 明 每分钟 走 50 米 ， 小 红 每分钟 走 60 米 ， 两 人 从 相距 660 米 的 两地 同时 沿 一条 公路 相对 出发 ， 8 分钟 后 两 人 相距 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1473", "content": "图书馆 有 科技 书 360 本 ， 是 故事书 的 (3/8) ， 故事书 有 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16375", "content": "多少 吨 的 (2/5) 比 9 吨 还 多 1 吨 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4553", "content": "育才 小学 有 360 名 学生 ， 其中 有 (1/5) 的 学生 没有 参加 兴趣 活动 小组 ， 参加 兴趣 活动 小组 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13026", "content": "学校 购买 15 张 办公桌 和 22 把 办公椅 共用 了 6010 元 ， 每 把 办公椅 55 元 ， 每张 办公桌 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15473", "content": "食堂 运回 一批 煤 ， 第一个 月 烧 去 8.5 吨 ， 第 二 个 月 多 烧 1.8 吨 ， 还 剩下 6.2 吨 ． 这 批 煤 共有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18550", "content": "一 款 手机 0.7 出售 是 630 元 ， 这 款 手机 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5614", "content": "同学 们 参加 课外活动 ． 跳绳 的 和 打乒乓球 的 各 有 3 组 ， 跳绳 的 每组 18 人 ， 打乒乓球 的 每组 12 人 ， 一共 有 多少 人 参加 活动 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "164", "content": "把 一段 长 (5/8) 米 的 钢管 锯 成 若干 相等 的 小 段 ， 一共 锯 了 4 次 ， 平均 每 段 钢管 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12672", "content": "小 华 和 小 李 都 看 一本 180 页 的 故事书 ， 小 华 每天 看 10 页 ， 小 李 每天 看 15 页 ， 小 李 比 小 华 提前 几天 看 完 这 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12473", "content": "两个 数 的 和 是 (4/7) ， 其中 一个 加数 是 (1/7) ， 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20922", "content": "现在 用 20 克 糖 ， 把 糖 和 水 按 1 ： 4 ， 酿成 糖水 ， 可以 得到 糖水 多少 克 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15611", "content": "在 远古 之 国 ， 小春 香 遇到 梁 龙 ， 小春 香 发现 ， 从 碰到 梁 龙 的 头 到 离开 梁 龙 的 尾巴 ， 经过 了 9 秒 ， 而 梁 龙 完全 趟 过 一条 宽 60 米 的 河 ， 一 共用 了 29 秒 （ 从头 入 河 到 尾巴 离开 河 ） ， 那么 这 条 梁 龙 长 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20617", "content": "一 桶 水 共有 6280 毫升 ， 一个 杯子 装满 能 放 40 毫升 ， 这样 倒 满 多少 杯 后 ， 桶 里 还 剩下 2240 毫升 水 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20245", "content": "甲 每 小时 加工 54 个 零件 ， 乙 每 小时 加工 45 个 零件 ， 甲 、 乙 共同 加工 6 小时 ， 还 剩 83 个 零件 没 加工 完 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "545", "content": "商店 有 一款 毛衣 ， 售价 12000 元 ， 比 原价 便宜 40% ， 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12122", "content": "一 种 商品 ， 现在 成本 比 原来 降低 (1/12) ， 现在 成本 是 原来 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10705", "content": "某 食堂 购买 一批 大米 ， 第一周 吃 了 全部 的 (1/4) ， 第 二 周 吃 了 余下 的 (2/5) ， 第 3 周 吃 了 （ 前 两周 吃 后 ） 又 余下 的 (1/2) ， 第 4 周 将 剩下 的 180 斤 全部 吃 完 ， 则 这 批 大米 共有 多少 斤 ．", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14349", "content": "把 一张 边长 为 6 厘米 的 正方形 纸片 剪成 一个 最大 的 圆 ， 这个 圆 的 周长 = 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16513", "content": "一 个数 减去 它 的 75% 等于 56 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10692", "content": "制造 一台 机器 ， 原来 需要 钢材 3 吨 ， 现在 比 原来 节省 了 (1/6) ， 原来 做 100 台 机器 所用 的 钢材 ， 现在 可以 做 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12538", "content": "全班 50 人 ， 体育锻炼 达标 的 有 45 人 ， 未达标 的 人数 占 全班 人数 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9361", "content": "计划 将 一块 地 的 (7/9) 用于 栽花 ， (1/9) 用于 种草 ． 种草 的 地面 比 栽花 的 地面 少 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16886", "content": "甲 、 乙 两站 相距 720 千米 ， 两列 火车 由 两站 相对 开出 ， 2 小时 后 还 相距 80 千米 ． 已知 快车 每 小时 行 200 千米 ， 慢车 每 小时 行 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20802", "content": "一 件 皮衣 的 成本价 是 1200 元 ， 若 商家 以 30% 的 盈利率 卖 给 顾客 ， 则 售价 = 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20114", "content": "一 幢 6 层 的 楼房 ， 每 层高 约 2.83 米 ． 这幢 楼房 大约 高 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13399", "content": "小 玲 在 其中 考试 中 ， 数学 得 96 分 ， 英语 比 数学 少 4 分 ， 语文 比 英语 多 3 分 ， 语文 考 了 多少 分 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11427", "content": "张 凡 叔叔 竞争上岗 到 物业管理 所 工作 ， 每月 工资 1600 元 ， 按规定 ， 减去 1200 元 后 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 他 每月 实际收入 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22496", "content": "一 堆 煤 共 54 吨 ， 一辆 载重 8 吨 的 卡车 一共 运 了 4 次 ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21807", "content": "水果 批发市场 有 2 吨 水果 ， 卖出 了 (1/2) 吨 ， 还 剩 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21050", "content": "学校 运动会 开幕式 的 方块 队 共有 273 人 ， 女生 有 9 行 ， 每行 12 人 ， 男生 有 11 行 ， 每行 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19837", "content": "体育 室 有 排球 32 个 ， 足球 的 个数 是 排球 个数 的 5 倍 ， 足球 有 几个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7138", "content": "小 明 和 小 军 分别 同时 从 家 和 少年宫 出发 ， 相向 而 行 ． 小 明 每分钟 行 120 米 ， 5 分钟 后 小 明 已 超过 两地 中 点 50 米 ， 这时 他们 俩 还 相距 30 米 ， 小 军 每分钟 行 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19237", "content": "幼儿园 买来 16 盒 蛋糕 ， 每盒 8 个 ， 平均 分给 4 个 班 ， 每个 班 能 分 到 多少 个 蛋糕 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "665", "content": "水利工程 队 挖 了 一条 水渠 ， 第一天 挖 了 全长 的 (1/4) ， 第 二 天 挖 了 余下 的 (3/7) ， 第 3 天 挖 了 60 米 ， 水渠 正好 挖 完 ， 求 这 条 水渠 有 多长 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22287", "content": "李 小 东 用 一根 绳子 绕 树干 3 圈 ， 绳子 正好 多 5 分 米 ， 他 又 接上 6 分 米 的 绳子 ， 这样 正好 又 能 绕 树 一圈 ． 绳子 原来 长 多少 分 米 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6701", "content": "第一 仓库 存粮 250 吨 ， 第 二 仓库 存粮 比 第一 仓库 的 2 倍 还 多 30 吨 ， 两个 仓库 共存 粮 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3457", "content": "从 9.75 里 减去 7.29 / 0.81 的 商 ， 所得 的 差 再 减去 0.28 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16559", "content": "一 服装厂 原 计划 每天 生产 500 套 服装 ， 25 天 完成 任务 ， 实际 完成 任务 只用 了 20 天 ． 实际 每天 比 原 计划 每天 多 生产 服装 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6603", "content": "学校 图书室 购进 300 本 故事书 ， 比 科技 书 的 (2/5) 多 50 本 ． 购进 科技 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15652", "content": "一 根 50 米 的 铁丝 用 去 (1/5) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5199", "content": "学校 原有 文艺 书 338 本 ， 有 又 买来 214 本 ． 把 这些 文艺 书 平均 分给 6 个 年级 ， 每个 班级 分 得 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7955", "content": "小 军 的 体重 是 24 千克 ， 是 爸爸 体重 的 (3/8) ， 爸爸 的 体重 = 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4277", "content": "下午 放学 时 ， 弟弟 以 每分钟 40 米 的 速度 步行 回家 ． 8 分钟 后 ， 哥哥 以 每分钟 60 米 的 速度 也 从 学校 步行 回家 ， 结果 两 人 同时 到 家 （ 路上 两 人 都 没 逗留 ） ． 他们 家 距 学校 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "889", "content": "百 福 超市 举行 可乐 “ 买 3 赠 1 ” 的 活动 ． 三年级 共有 56 人 ， 每人 喝 一瓶 可乐 ， 只 需要 买 多少 瓶 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19824", "content": "328 与 308 的 和 乘以 它们 的 差 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18725", "content": "用 5.4 千克 花生 能 榨油 1.2 千克 ， 榨 1 千克 油 需要 花生 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19876", "content": "奶牛场 有 5 个 大棚 ， 每个 大棚 有 8 头 奶牛 ． 一天 共 喂 800 千克 饲料 ， 平均 每 头 喂 多少 饲料 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12955", "content": "一 个 圆柱 的 底面 半径 是 5 cm ， 高 是 4 cm ， 它 的 侧 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "21850", "content": "(3/2) * （ (1/6) + (4/9) ） = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6446", "content": "学校 购买 了 6 套 课桌椅 ， 一共 付 了 288 元 ． 一个月 后 又 购买 了 同样 的 课桌椅 8 套 ， 还要 再 付 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21802", "content": "一 个 环形 外 圆 半径 为 6 厘米 ， 内 圆 半径 为 4 厘米 ， 环形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "-", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "5336", "content": "小 明 读 一 本书 ， 第一天 读 了 这 本书 的 (1/3) 多 2 页 ， 第 二 天 读 了 这 本书 的 (1/2) 少 一页 ， 第 3 天 读完 剩下 的 10 页 ． 这 本书 共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16858", "content": "乐乐 买 书 用 去 8.55 元 ， 买 钢笔 用 去 3.8 元 ， 付给 售货员 30 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11853", "content": "王大妈 收 了 64 千克 黄瓜 ， 李大妈 收 了 28 千克 黄瓜 ． 把 这些 黄瓜 平均 装进 4 个 筐 里 ， 每 筐 装 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19434", "content": "某班 同学 数学考试 平均 分为 91.5 分 ， 复查 时 发现 ， 计算 成绩 时 将 一名 同学 的 98 分 误 作 89 分 计算 了 ， 经 重新 计算 后 ， 全班 数学 平均 分为 91.7 分 ， 那么 这个 班 有 多少 学生 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19025", "content": "一 个 木盆 的 底面 是 圆形 ． 在 它 的 底部 箍 一根 长 2.552 米 的 铁丝 ， 铁丝 的 接头处 用 了 0.04 米 ． 这个 木盆 的 底面 直径 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10544", "content": "一 本书 共 250 页 ， 一个 小朋友 已 读 页数 的 (4/7) 是 未 读 页数 的 3 倍 ， 这个 小朋友 读 了 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16923", "content": "一 根 木头 长 6 米 ， 要 把 它 锯 成 4 段 ． 每 锯 一段 需要 5 分钟 ， 锯 完 一共 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21197", "content": "一 个数 的 (1/2) 比 它 的 (1/3) 多 90 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5521", "content": "小 明 读 一本 故事书 ， 第一天 读 了 20 页 ， 第 二 天 读 了 25 页 ， 还 余下 全书 的 40% 没有 读 ， 这本 故事书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11948", "content": "一 根 绳子 的 长 是 (5/8) 米 ， 比 另 一根 短 (1/6) 米 ， 这 两根 绳子 一共 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13769", "content": "一 条 公路 长 10 千米 ， 第一次 修 了 (1/5) ， 第 二 次 又 修 了 余下 的 (1/3) ， 共 修 了 多少 千米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16254", "content": "民安 路 长 (3/2) km ， 小 玉 走 了 这 条 路 的 (1/3) ， 小 玉 走 了 多少 km ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17039", "content": "一 只 乒乓球拍 15 元 ， 如果 买 2 副 这样 的 乒乓球拍 ， 一共 需要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16715", "content": "甲 数 是 40 ， 比 乙 数 少 (1/5) ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17069", "content": "某 盐水 中 盐 和 水 的 比 为 1 ： 99 ， 现有 盐 2 kg ， 可 配制 这种 盐水 多少 kg ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16689", "content": "修 一条 长 1260 米 的 水渠 ， 100 人 6 天 可以 完工 ， 现在 增加 20 人 ， 多少 天 可以 完工 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17004", "content": "我们 班 同学 回收 了 2.5 千克 废纸 ， 这些 废纸 可 生产 多少 千克 的 再生纸 ？ （ 回收 1 千克 废纸 ， 可 生产 0.84 千克 的 再生纸 ． ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4604", "content": "六1 班 有 学生 44 人 ， 参加 合唱队 的 占 全班 人数 的 (2/11) ． 参加 合唱队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20309", "content": "一 根 长 12 米 的 绳子 ， 第一次 剪 去 3.9 米 ， 第 二 次 剪 去 2.2 米 ． 现在 这根 绳子 比 原来 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18888", "content": "修 一条 长 1800 米 得 水渠 ， 甲队 每天 可以 修 50 米 ， 乙 队 每天 可以 修 40 米 ， 两队 同时 修 ， 多少 天 可以 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10500", "content": "直径 为 10 厘米 的 圆 的 周长 为 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12489", "content": "在 一个 周长 900 米 的 湖边 栽树 ， 每隔 9 米 载 一棵 ， 可 栽树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4431", "content": "已知 甲乙 两地 相距 160 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 已经 走 了 全长 的 (3/4) ， 这辆 汽车 还要 走 多 远 才 到 乙地 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14243", "content": "煤厂 有 煤 400 吨 ， 上午 运出 总数 的 25% ， 下午 运出 总数 的 40% ， 下午 比 上午 多 运出 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "396", "content": "一 件 上衣 原价 500 元 ． 现在 打 0.8 销售 ， 这件 上衣 比 原来 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16032", "content": "修 一段 长 324 米 的 路 ， 前 8 小时 共 修 了 240 米 ， 如果 剩下 的 4 小时 修 完 ， 每 小时 修 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22882", "content": "排队 做操 ， 从 前面 数 小 明 排 第 4 个 ， 从 后面 数 小 明 排 第 6 个 ， 这 一排 一共 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20174", "content": "学校 组织 跳绳 比赛 ， 小 红 跳 了 460 下 ， 是 小花 的 (2/3) ， 小花 跳 的 又 是 小 明 跳 的 (3/4) ， 小 明 跳 多少 下 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20561", "content": "（ (1/3) + (3/4) ） * 12 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9458", "content": "迎 迎 家 离 学校 有 840 米 ， 她 从 家 到 学校 要 走 14 分钟 ． 她 用 同样 的 速度 ， 到 离家 360 米 的 新华书店 ， 要 走 几分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1186", "content": "被除数 是 24 ， 除数 是 3 ， 商 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13528", "content": "(2/5) - (1/3) + (1/2) = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5077", "content": "修 一条 水渠 ， 已经 修 了 42 千米 ， 剩下 18 千米 ， 这 条 水渠 有 多长 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1349", "content": "一 根 电线 ， 先 用 去 了 总长 的 (1/4) ， 又 用 去 剩下 的 (3/5) ， 最后 剩 12 米 ， 这根 电线 原来 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2549", "content": "回收 1 千克 废纸 ， 可 生产 0.8 千克 再生纸 ． 翠微 小学 四年级 学生 回收 86 千克 废纸 ， 四年级 同学 所 回收 的 废纸 可 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15539", "content": "一 篇 散文 的 字数 删去 300 字 ， 这时 散文 的 字数 相当于 小说 字数 的 (1/90) ， 若 散文 的 字数 删去 200 字 ， 这时 散文 的 字 当 数 相当于 小说 的 (1/100) ， 求 小说 的 字数 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "906", "content": "一 列 火车 4 小时 行驶 了 400 千米 ， 它 的 速度 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19732", "content": "一 列 火车 从 甲地 开往 乙地 ， 8 小时 行 了 全程 的 (4/7) ． 照 这样 的 速度 ， 再行 几小时 可 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1515", "content": "将 浓度 为 75% 是 盐水 32 克 稀释 成 浓度 为 30% 的 盐水 ， 需 加水 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22068", "content": "小强 投篮 的 命中率 是 96% ， 上周 比赛 时 他 投中 24 个 球 ， 他 一共 投 了 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6713", "content": "5.2 与 4.7 的 和 除以 它们 的 差 ， 结果 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9186", "content": "一 根 木料 要 锯 成 4 段 ． 如果 每 锯 一次 要 花 3 分钟 ， 全部 锯 完 要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2608", "content": "1 立方分米 棉花 重 0.08 千克 ， 15 立方分米 的 棉花 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22312", "content": "停车场 上 有 大 汽车 26 辆 ， 小汽车 的 数量 是 大 汽车 的 3 倍 ． 停车场 上 大 汽车 比 小汽车 少 多少 辆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5704", "content": "一 个 服装厂 计划 要 生产 850 套 西服 ， 已 生产 了 350 套 ， 剩下 5 天 完成 ， 剩下 的 平均 每天 生产 多少 套 ？ （ 用 综合 算式 解答 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8228", "content": "一 种 商品 现在 的 价格 相当于 原价 的 (6/7) ， 如果 现价 是 120 元 ， 这件 商品 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6634", "content": "1 米 的 (4/5) 和 多少 的 (1/5) 一样 长 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "493", "content": "小 方 看 一本 52 页 的 故事书 ， 已经 看 了 3 天 ， 每天 看 8 页 ． 剩下 的 要 4 天 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22813", "content": "某 旅游景点 双休日 的 门票 收 人 是 4.5 万元 ， 星期天 的 门票 收入 比 星期 6 的 收入 多 (1/4) ． 星期天 的 收 人为 多少 万元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13231", "content": "从 (19/30) 中 减去 5 个 (1/30) ， 结果 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1040", "content": "丽丽 家养 了 20 只 山羊 ， 14 只 绵羊 ， 还 养 了 272 只 兔子 ． 丽丽 家养 兔 的 只 数 是 羊 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "758", "content": "甲 数 除 乙 数 ， 商 是 3.6 ， 把 乙 数 扩大 5 倍 ， 甲 数 不变 ， 那么 商 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17507", "content": "从 450 中 连续 减去 多少 个 15 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12358", "content": "一 个数 分别 与 39 和 61 相乘 ， 再 把 结果 相加 ， 得 3800 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16683", "content": "比 35 的 (2/7) 多 9 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5007", "content": "学校 图书馆 新购 文艺 书 320 册 ， 新购 的 科技 书 比 文艺 书 多 60 册 ， 新购 的 连环画 的 册数 正好 是 科技 书 的 4 倍 ． 新购 的 连环画 多少 册 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16906", "content": "学校 要 为 运动员 添置 服装 ， 其中 上衣 每件 126 元 ， 裤子 每 条 88 元 ， 如果 添置 12 套 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9759", "content": "一 个 直角三角形 ， 两条 直角 线 都 是 2.6 cm ． 这个 三角形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18111", "content": "女工 有 20 人 ， 男工 与 女工 的 比 是 4 ： 5 ， 男 工人 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20584", "content": "学校 图书馆 共有 12 个 书架 ， 平均 每个 书架上 放 书 560 本 ， 现已 借给 学生 1870 本 ， 借给 老师 480 本 ， 问 图书馆 里 还有 书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3515", "content": "一 堆 煤 已 运走 (2/15) ， 剩下 的 比 运走 的 多 220 吨 ， 这 堆 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18518", "content": "王老师 要 批改 58 篇 作文 ， 已经 批改 了 13 篇 ． 如果 每 小时 改 9 篇 ， 还要 几小时 能 改 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7021", "content": "预 旺 中心小学 的 李老师 到 菜市场 买 了 4.5 千克 的 豆角 ， 交给 售货员 10 元 钱 后 ， 找回 1.9 元 ， 每千克 豆角 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7393", "content": "超级 女生 小春 在 唱歌 比赛 中 ， 有 3 个 评委 给 她 9.18 分 ， 有 4 个 评委 给 她 9.25 分 ， 她 的 总分 = 多少 分 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10043", "content": "水果店 卖出 28 筐 荔枝 ， 每 筐 8 千克 ， 每千克 12 元 ． 共 收款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3374", "content": "丁丁 计划 挖 一个 2 米 深 的 雪屋 ， 已经 挖 了 (3/8) ， 还 剩 多少 米 没有 挖 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2616", "content": "光明 学校 举行 体操比赛 ， 共有 5 个 组 ， 每组 有 3 个 队 ， 一共 有 735 人 参加 比赛 ， 每个 队 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7763", "content": "拌 制 36 吨 的 混凝土 ， 其中 水泥 占 (1/4) ， 黄沙 需 7.2 吨 ， 其余 的 是 石子 ， 石子 占 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "773", "content": "学校 开展 节水 活动 ， 某 星期 前 4 天 共 节水 8.4 吨 ， 后 3 天 平均 每天 节水 4.9 吨 ， 这 一 星期 平均 每天 节水 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12104", "content": "童 鞋店 运 来 6 箱 童鞋 ， 每箱 10 双 ， 一共 卖 了 900 元 ， 每 双 童鞋 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18508", "content": "饲养场 运回 106 袋 饲料 ， 每 袋 35 kg ， 用 了 一段时间 后 ， 还 剩下 45 袋 ， 已经 用 了 多少 千克 饲料 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7518", "content": "加工 一批 零件 ， 已经 加工 这 批 零件 的 25% 多 20 个 ． 已经 加工 的 零件 与 未加工 的 比 是 3 ： 5 ， 这 批 零件 = 多少 个 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2207", "content": "5 箱 蜜蜂 一年 可以 酿 175 千克 蜂蜜 ． 小林 家养 了 这样 的 蜜蜂 12 箱 ， 一年 可以 酿 多少 千克 蜂蜜 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6074", "content": "某 厂 原 计划 生产 水泥 60 万吨 ， 实际 生产 69 万吨 ， 实际 比 计划 多 生产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18945", "content": "育才 小学 六年级 有 学生 450 人 ， 其中 有 60% 达到 国家 体育锻炼 标准 ， 要 使 六年级 达标率 达到 80% ， 还 应有 多少 人 达标 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17715", "content": "某 商场 所有 商品 打 0.9 出售 ， 同时 按规定 ， 如果 持有 贵宾卡 ， 可以 再 打 0.95 ， 李老师 想 买 了 一件 2600 元 的 大衣 ， 同时 他 持有 贵宾卡 ， 李老师 实际 要 付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7904", "content": "琪琪 今年 12 岁 ， 她 妈妈 今年 36 岁 ， 5 年前 妈妈 比 琪琪 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7394", "content": "把 一颗 高 5 米 的 树种 入土 中 ， 露出 地面 的 部分 长 4.06 米 ， 种 入土 中 的 部分 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16937", "content": "植物园 里 新 种植 了 100 棵 针叶树 ， 预计 成活率 在 95% 以上 ， 至少 有 多少 棵 成活 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10926", "content": "一 个 工厂 原来 每天 生产 零件 270 个 ， 比 现在 每天 少 10% ， 现在 每天 生产 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17330", "content": "禽 场 养鸡 120 只 ， 养 的 鹅 是 鸡 的 (3/4) ， 养 的 鸭 是 鹅 的 2 倍 少 100 只 ． 养鸭 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14286", "content": "6 （ 1 ） 班 12 名 同学 进行 乒乓球 比赛 ， 如果 每 2 名 同学 之间 进行 一场 比赛 ， 一共 要 比赛 多少 场 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15557", "content": "五年级 有 120 人 ， 男 、 女生 人数 比 是 7 ： 5 ， 女生 有 多少 人 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11024", "content": "两个 工程队 挖 一条 水渠 ， 甲队 每天 挖 1.4 千米 ， 乙 队 每天 挖 1.6 千米 ， 它们 合作 挖 了 10 天 后 ， 还 剩 9 千米 ． 这 条 水渠 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22480", "content": "晓 冰 看 一本 230 页 的 书 ， 已经 看 了 5 天 ， 平均 每天 看 18 页 ， 剩下 的 要 7 天 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "526", "content": "5 （ 1 ） 班 有 46 人 ， 喜欢 打乒乓球 的 有 32 人 ， 喜欢 打 羽毛球 的 有 26 人 ． 有 2 人 两种 运动 都 不 喜欢 ． 既 喜欢 打乒乓球 ， 又 喜欢 打 羽毛球 的 至少 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8468", "content": "学校 买来 20 个 足球 ， 比 买来 篮球 的 个数 多 25% ． 买来 篮球 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2098", "content": "学校 航模 组 人数 是 电脑 组 人数 的 (4/5) ， 电脑 组 人数 是 美术组 的 (3/4) ， 航模 组 有 12 人 ， 美术组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21559", "content": "看 一 本书 ， 每天 看 全书 的 (2/7) ， 3 天 看 了 全书 的 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3760", "content": "小 军 的 邮票 张 数 比 小海 多 (1/3) ， 小海 的 邮票 张 数 是 小 明 的 (6/7) ． 已知 小 军 比 小海 多 30 张 邮票 ， 小 明 有 多少 张 邮票 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2920", "content": "700 比 250 多 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15178", "content": "已知 两个 数 的 积 是 5.6 ， 其中 一个 数 是 35 ， 另 一个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20143", "content": "一 本书 小 明 第一天 看 了 20% ， 第 二 天 看 了 60 页 ， 还 剩 120 页 没 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19399", "content": "两列 火车 分别 从 甲乙 两地 同时 相对 开出 ， 6 小时 后 相遇 ， 甲 车 每 小时 行 140 千米 ， 乙 车 每 小时 行 150 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19646", "content": "甲 港 与 乙 港 相距 120 千米 ， 船速 为 每 小时 35 千米 ， 水速 为 每 小时 5 千米 ， 一个 旅客 乘 该 船 在 甲 、 乙 两 港 来回 一趟 共 需 多少 小时 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16676", "content": "一 个 圆形 跑道 ， 全长 700 米 ． 甲乙 两 人 同时 同 地 出发 ， 相 背 而 行 ． 甲 每秒钟 跑 7.5 米 ， 乙 每秒 跑 6.5 米 ， 几秒钟 后 两 人 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15544", "content": "小 明 把 红 黄 两种 外观 一样 的 色球 放在 袋子 中 ， 红球 放 了 8 个 ． 他 摸 出 黄 球 的 可能性 是 (2/3) ， 他 放 了 多少 个 黄 球 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13937", "content": "李 明 和 王 华 到 果园 摘葡萄 ． 李 明 采摘 了 13.5 千克 ， 王 华 如果 再 采摘 3 千克 就 和 李 明 同样 多 ． 李 明 和 王 华 一共 采摘 了 多少 千克 葡萄 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20986", "content": "(2/3) 吨 煤 用 去 (1/4) = 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22317", "content": "一 种 手表 售价 62 元 ， 比 原价 降低 了 18 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9319", "content": "一 根 绳子 长 42 米 ， 用 去 它 的 (3/7) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6753", "content": "某 车间 生产 零件 ， 5 月份 上旬 完成 月 计划 的 (1/3) ， 中旬 完成 月 计划 的 (2/5) ， 正好 完成 了 1650 件 ， 求 月 计划 = 多少 件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3574", "content": "通济 乡 今年 每 亩产 小麦 600 千克 ， 比 去年 每亩 增产 20% ． 去年 每 亩产 小麦 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16710", "content": "水果店 运 来 18 筐 苹果 重 630 千克 ， 运 来 23 筐 梨 重 736 千克 ， 每 筐 苹果 比 梨 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11475", "content": "有 一桶 高级 饮料 ， 小 华 一 人 可 饮 14 天 ， 若 和 小 芳 同饮 则 可用 10 天 ， 若 小 芳 独自一人 饮 ， 可用 多少 天 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4257", "content": "新华 小学 在 向 灾区 捐款 活动 中 ， 中年级 捐款 数 比 低年级 的 1.5 倍 少 250 元 ， 是 高年级 捐款 数 的 (5/6) ． 已知 低年级 捐款 3500 元 ， 高年级 捐款 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2764", "content": "某 工程队 修 一条 公路 ， 已修 了 1200 米 ， 这时 已修 的 与 未 修 的 比 是 3 ： 2 ， 这 条 公路 全长 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2834", "content": "一 个数 的 6 倍 是 5400 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15180", "content": "某班 同学 利用 课余时间 栽 一批 树 ， 第一天 栽 了 全部 的 (1/6) ， 第 二 天 栽 了 21 棵 ， 还 剩 第一天 栽 的 棵 数 的 (3/2) 没 栽 ， 这 批 树 共 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9010", "content": "张 丽 买 了 3 支 铅笔 和 5 本 练习本 ， 共用 了 8.4 元 ， 已知 每 本 练习本 1.2 元 ， 每支 铅笔 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18459", "content": "小 红 家 3 天 用 去 一瓶 食用油 的 (1/3) ， 平均 每天 用油 150 毫升 ． 这 瓶 油 共有 多少 毫升 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18542", "content": "某班 第一 学习 小组 在 一次 单元 测验 中 ， 4 名 女生 比 5 名 男生 得分少 69 分 ， 已知 女生 平均分 是 91.5 分 ， 男生 的 平均分 = 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17249", "content": "甲 数 的 60% 是 48 ， 甲 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22016", "content": "张 小 青 有 125 张 邮票 ， 是 李 明 邮票 张 数 的 (5/7) ， 他们 两 人 的 邮票 相差 多少 张 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6010", "content": "从 甲地 到 乙地 坐飞机 需要 11 小时 ， 飞机 每 小时 飞行 735 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "529", "content": "青龙 4 小 开展 兴趣小组 活动 ， 书法 小组 有 75 人 ， 舞蹈 小组 是 书法 小组 的 4 倍 ， 舞蹈 小组 和 书法 小组 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "238", "content": "服装厂 上 半月 生产 服装 占 全 月 计划 的 (3/5) ， 下半月 生产 服装 占 全 月 计划 的 (5/8) ． 全 月 超额完成 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4671", "content": "甲 与 乙 两个 工人 加工 同 一种 零件 的 工作效率 比 是 6 ： 5 ， 现在 两 人 合 做 一批 零件 共计 880 个 ， 乙 比 甲 要 少 做 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22568", "content": "一 根 绳 用 去 20% 后 ， 还 剩 24 米 ， 这根 绳 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8939", "content": "一 个数 减去 它 的 (2/5) 等于 1.44 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13290", "content": "一 根 圆钢 的 底面 直径 为 10 厘米 ， 长 为 50 厘米 ， 它 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2409", "content": "服装厂 原 计划 做 西服 1080 套 ， 20 天 完成 ． 实际 每天 做 72 套 ， 实际 每天 比 原 计划 多 做 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16926", "content": "商店 运 来 240 千克 苹果 ， 卖出 6 箱 ， 每箱 15 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21646", "content": "乒乓球 厂 每天 可 生产 8400 只 乒乓球 ， 如果 每 12 只 装 一盒 ， 每 10 盒装 一箱 ， 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11568", "content": "小 和尚 用 12 分钟 把 一根 树干 锯 成 了 4 段 ， 那么 把 一根 树干 锯 成 8 段 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5822", "content": "妈妈 把 6000 元 人民币 存入 银行 ， 定期 2 年 ， 年利率 是 4.40% ， 到期 时 ， 妈妈 可 取出 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18003", "content": "有 一根 不锈钢 钢条 长 20 米 ， 小 明 先 锯下 两头 共 2 米 长 的 损坏 部分 ， 然后 把 剩下 的 不锈钢 钢条 锯 成 一样 长 的 几段 ． 他 又 锯 了 5 次 ， 则 余下 的 每 段 不锈钢 钢条 长 多少 米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22432", "content": "水果 大 卖场 上午 运进 120 千克 苹果 ， 下午 运进 的 苹果 比 上午 的 2 倍 还 多 40 千克 ． 这 一天 共 运进 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2330", "content": "鸭 的 孵化期 大约 是 28 天 ， 鸡 的 孵化期 比 鸭 少 (1/4) ． 鸡 的 孵化期 = 多少 天 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8485", "content": "李 大伯 养猪 320 头 ， 养牛 的 头数 是 养猪 的 12 倍 ， 李 大伯 养猪 、 牛 一共 有 多少 头 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4612", "content": "某校 有 学生 1028 人 ， 六年级 毕业 189 人 ， 一年级 新 招生 208 人 ， 现在 全校 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7044", "content": "修 一条 路 ， 已经 修 了 全长 的 60% ， 还 剩 240 米 没有 修 完 ， 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4124", "content": "一 个 文化 用品店 上午 卖出 练习本 622 本 ， 下午 卖出 279 本 ， 这时 一共 卖出 练习本 多少 本 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20384", "content": "一 套 运动服 打 0.8 后 卖 40 元 ， 这 套 运动服 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3089", "content": "被除数 是 2425 ， 商 是 60 ， 余数 是 25 ， 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3353", "content": "一 项 工程 要 12 天 完成 ， 多少 天 完成 这项 工程 的 (7/12) ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6189", "content": "6 （ 1 ） 班 有 女生 24 人 ， 占 全班 人数 的 (4/9) ， 今年 转 出 了 若干名 女生 ， 这时 女生 占 全班 人数 的 (2/5) ， 求 今年 转 出 的 多少 名 女生 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4184", "content": "5 年 一班 有 学生 48 人 ， 其中 有 女生 28 人 ， 男生 占 全班 总 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21033", "content": "工地 运 来 9 车 水泥 ， 平均 每 车 装 30 袋 ， 每 袋 水泥 重 50 千克 ， 这些 水泥 共 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8086", "content": "四年级 同学 收集 树种 28 千克 ， 六年级 收集 的 比 四年级 多 (2/7) ， 六年级 比 四年级 多 收集 树种 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10726", "content": "45 米 比 多少 多 20% ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14740", "content": "学校 新建 校舍 ， 实际 投资 182 万元 ， 比 原 计划 节约 18 万元 ． 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4868", "content": "小 明 看 一本 430 页 的 书 ， 第一天 看 了 147 页 ， 第 二 天 看 了 108 页 ． 这 本书 小 明 还有 多少 页 没 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2401", "content": "百货商店 运 来 50 包 袜子 ， 每包 袜子 4 双 ， 如果 每 双 袜子 售价 2 元 ， 这些 袜子 一共 可 售 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17693", "content": "菜场 有 黄瓜 250 千克 ， 黄瓜 的 重量 比 西红柿 少 (1/6) ． 菜场 有 西红柿 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2645", "content": "爸爸 买 了 200 元 国家 建设 债券 ， 定期 3 年 ， 如果 年利率 是 2.89% ， 到期 时 他 可以 获得 利息 多少 元 ？ （ 此 债券 免缴 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4146", "content": "运输队 计划 运 一批 货物 ， 当 运走 了 全部 的 (2/7) 时 ， 还 剩下 货物 360 吨 ， 运走 了 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7296", "content": "一 辆 公共汽车 上 有 一些 乘客 ， 到 文化路 站 时 ， 有 (2/5) 的 人 下车 ， 又 上来 了 30 人 ， 这时 车上 的 乘客 正好 是 原来 的 (6/5) ． 车上 原有 乘客 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7565", "content": "鑫 新 饭店 想 买 12 张 桌子 和 136 把 椅子 ， 已知 每张 桌子 156 元 ， 每 把 椅子 48 元 ， 一共 花 了 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21098", "content": "育英 小学 给 灾区 捐书 ， 一共 捐出 768 本 ， 每 8 本 装 一包 ， 每 4 包装 一箱 ． 一共 可以 装 几箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5943", "content": "工厂 实际 用 煤 190 吨 ， 比 计划 节约 5% ， 计划 用 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3331", "content": "52 与 48 的 和 4 与 25 的 积 除 ， 商 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22223", "content": "某次 数学考试 中 ， 9 个 同学 的 平均分 是 72 ， 去掉 一个 转学 同学 的 成绩 后 ， 剩下 的 同学 的 平均分 是 为 78 分 ， 转学 走 的 同学 的 成绩 为 多少 分 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8420", "content": "一 根 电线 长 10 米 ， 用 去 它 的 (2/5) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12663", "content": "一 个 游泳池 的 周长 为 300 米 ， 沿 池边 每隔 10 米 放 一把 椅子 ， 一共 可以 放 多少 把 椅子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "817", "content": "新 学期开始 ， 新源 书店 推出 优惠活动 ， 购书 一律 0.95 ． 王 军 买 了 一本 《 少年 百科全书 》 ， 比 原价 便宜 6 元 ． 这 本书 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5896", "content": "甲乙 两 数 的 积 是 10.5 ， 甲 数 是 7 ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13158", "content": "秀丽 中学 的 食堂 本月 用 煤 6.16 吨 ， 比 上 月 节省 了 12% ， 上 月 用 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8585", "content": "长江 是 我国 第一 大河 ， 在世界上 位列 第 3 ， 干流 全长 6300 千米 ． 黄河 仅次于 长江 ， 是 我国 第 二 大河 ， 它 上游 、 中游 、 下游 的 长度 分别 是 3470 千米 、 1210 千米 、 790 千米 ． 长江 比 黄河 长 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16409", "content": "一 条 裤子 98 元 ， 一件 上衣 的 价钱 是 裤子 的 2 倍 ． 买 这样 一套 衣服 需要 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14130", "content": "果园 里 有 梨树 564 棵 ， 桃树 的 棵 数 是 梨树 的 23 倍 ， 果园 里 有 桃树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22436", "content": "某 停车场 规定 ： 停车 一次 至少 交 停车费 5 元 ， 超过 2 小时 ， 每 多 停 1 小时 ， 加收 1.5 元 ， 刘师傅 在 此 停车 6 小时 ， 应交 停车费 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20476", "content": "学校 宣传栏 上 有 一块 长 2.4 米 ， 宽 1.2 米 的 玻璃 碎 了 ， 需要 更换 多 大 的 一块 玻璃 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5247", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 如果 每 小时 行 80 千米 ， 15 小时 可以 到达 ； 如果 每 小时 行 60 千米 ， 多少 小时 可以 到达 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8906", "content": "一 个 比 的 比值 是 (3/4) ， 比 的 后 项 是 60 ， 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4663", "content": "新华 小学 的 630 名 同学 平均 分成 5 个 方阵 表演 团体操 ， 如果 每个 方阵 都 由 9 行 组成 ， 平均 每行 有 多少 名 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6693", "content": "龙海 中小 中年级 有 7 个 班 ， 每个 班 有 48 人 ， 其中 女生 有 187 人 ， 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19050", "content": "东风 农 机场 原来 制造 一台 农业机器 要 用 1.43 吨 钢材 ， 技术革新 后 ， 每 台 节省 钢材 0.13 吨 ， 原来 制造 450 台 农业机器 的 钢材 ， 现在 可以 制造 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21051", "content": "现在 有 浓度 是 3% 的 盐水 500 克 ， 为了 制成 浓度 是 4% 的 盐水 ， 需要 蒸发掉 水 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3730", "content": "某校 有 80 名 同学 是 音乐 或 体育 爱好者 ， 其中 有 36 人 爱好音乐 ， 55 人 爱好体育 ， 两项 都 爱好 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15856", "content": "有 300 个 同学 乘 4 辆车 去 秋游 ， 每辆车 有 78 个 座位 ， 还有 多少 个 空座位 没有 坐 学生 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6925", "content": "央视 二 套 “ 购物 街 ” 栏目 有 一个 价格 游戏 ， 一个 口袋 里 装 1 颗 白 球 、 5 颗 彩色 球 ， 任意 摸 一颗 ， 摸 到 白 球 算 “ 爆 ” ， 那 第一次 摸 “ 爆 ” 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2757", "content": "28 个 桃子 的 (4/7) = 多少 个 桃子 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12342", "content": "今天 红红 8 岁 ， 姐姐 13 岁 ， 10 年 后 ， 姐姐 比 红红 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9660", "content": "一 种 服装 每套 标价 500 元 ， 因 季节 变换 打 0.8 出售 ， 这样 每套 仍 能 获利 25% ． 这种 服装 每套 成本 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2922", "content": "修路 队 两天 修 完 一段 公路 ， 第一天 修 了 120 米 ， 第 二 天 比 第一天 多 修 25% ． 这 段 公路 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9486", "content": "人造地球 卫星 的 速度 相当于 宇宙飞船 速度 的 (40/57) ． 如果 人造地球 卫星 每秒 飞行 8 千米 ， 那么 宇宙飞船 每秒 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14627", "content": "同学 们 参观 天文馆 ， 六年级 去 了 154 人 ， 五年级 去 的 人数 比 六年级 多 (1/11) ， 四年级 去 的 人 比 五年级 少 (1/8) ． 四年级 去 了 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22182", "content": "印刷厂 计划 每天 印 1350 本书 ， 实际 5 天 印 了 7000 本 ， 实际 每天 比 计划 多 印 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4430", "content": "一 堆 煤 ， 原 计划 每天 烧 3 吨 ， 可以 烧 72 天 ， 改造 锅炉 后 ， 每天 只 烧 2.4 吨 ， 这 堆 煤 现在 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15354", "content": "把 (3/5) 米 长 的 绳子 平均 分成 3 份 ， 每份 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20212", "content": "妈妈 买 一件 上衣 花 200 元 ， 比 裤子 贵 (3/5) ， 裤子 花 了 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22961", "content": "某 商场 购进 一批 服装 ， 每套 服装 的 进价 是 240 元 ， 售价 是 272 元 ， 售完 后 共 赢利 640 元 ． 这 批 服装 有 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5291", "content": "一 辆 旅游车 在 平原 和 山区 各行 了 2 小时 ， 最后 到达 山顶 ． 已知 旅游车 在 平原 每 小时 行 50 千米 ， 山区 每 小时 行 30 千米 ． 这 段 路程 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "535", "content": "一 个数 除以 6 ， 再 减去 120 ， 得 30 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9042", "content": "同学 们 去 秋游 ， 租 了 4 条 大船 和 6 条 小船 ， 共用 去 112 元 ， 每 条 小船 租金 是 8.5 元 ， 问 每 条 大船 租金 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3536", "content": "4 年 一班 46 个 同学 合影 ． 定价 是 24.5 元 ， 给 4 张 像片 ． 另外 再 加印 是 每张 2.3 元 ． 全班 每人 要 1 张 ， 一共 要 付 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15834", "content": "一 堆 煤 ， 每天 烧 1.5 吨 ， 可以 烧 32 天 ； 如果 每天 烧 1.2 吨 ， 可以 烧 多少 天 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20454", "content": "甲 、 乙 两辆车 人数 原来 相等 ． 甲 车 又 上来 24 人 ， 乙 车 下去 14 人 后 ， 现在 甲 车 人数 比 乙 车 人数 多 (19/6) ． 甲 、 乙 两车 原来 各 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5459", "content": "学校 有 75 个 篮球 ， 35 个 排球 ， 把 这些 球 平均 分给 5 个 班 ， 每个 班 分 得 几个 球 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20622", "content": "5 （ 3 ） 班 有 28 人 订立 《 小学生 天地 》 ， 20 人 订 了 《 中国 少年报 》 ， 班上 共有 42 名 学生 ， 每人 至少 订立 了 两种 刊物 中 的 一种 ， 那么 ， 两种 书 都 订 了 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8294", "content": "一 件 上衣 售价 260 元 ， 后来 打 0.7 出售 ， 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13584", "content": "一 个 数学 测验 只有 两道 题 ， 结果 全班 有 10 人 全 对 ， 第一 题 有 25 人 做 对 ， 第 二 题 有 18 人 做 错 ， 那么 两道 都 做 错 的 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6145", "content": "一 个 比 的 后 项 是 6 ， 比值 是 (1/2) ， 那么 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13939", "content": "冬冬 家 买来 二 袋 面粉 ， 吃 了 15 千克 ， 正好 是 这 袋 面粉 的 (3/5) ， 这 袋 面粉 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7094", "content": "在 一块 长 20 米 ， 宽 16 米 的 田地 上 种 棉花 ， 平均 每平方米 种 棉花 8 株 ， 这块 地 一共 可以 种 多少 株 棉花 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23022", "content": "一 辆 汽车 用 了 2 小时 行 完全 程 的 (4/5) ， 行 完全 程 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "515", "content": "一 个 平行四边形 的 面积 是 18 平方米 ， 底 是 6 米 ， 高 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3123", "content": "红星 水果店 有 775 千克 苹果 ， 400 千克 桔子 ， 如果 每 25 千克 装 1 袋 ， 那么 苹果 比 桔子 多 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19243", "content": "某班 有 女生 24 人 ， 男生 比 女生 多 4 人 ， 男生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17860", "content": "六年级 有 55 名 女生 ， 参加 校 合唱队 的 女生 占 全年 级 女生 人数 的 (3/11) ， 参加 合唱队 的 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22540", "content": "同学 们 去 公园 秋游 ， 玩 跷 板 的 有 8 人 ， 荡秋千 的 人 比 玩 跷 板 的 多 4 人 ， 滑 滑梯 的 人数 是 荡秋千 人数 的 3 倍 ． 滑 滑梯 的 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20203", "content": "小 明 在 月球 上 的 体重 是 5 千克 ， 在 月球 上 他 的 体重 是 地球 上 的 (1/6) ， 那么 她 在 地球 上 的 体重 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12404", "content": "756 / 18 的 商 加 995 的 和 是 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19208", "content": "盒 中 装有 红球 和 白 球 共 8 个 ， 如果 从 盒 中 任意 摸 出 一 球 ， 摸 到 白 球 的 可能性 是 (1/8) ， 那么 盒 中 应该 放 多少 个 白 球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13269", "content": "56 个 小朋友 排成 一队 去 春游 ， 从 排 头数 ， 小 刚 是 第 19 个 ， 从 排 尾数 ， 小 莉 是 第 12 个 ． 小 刚 与 小 莉 中间 有 多少 个 同学 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16383", "content": "水果 批发市场 有 桔子 450 千克 ， 苹果 比 桔子 少 20% ， 比 梨 多 12.5% ． 水果 批发市场 有 梨 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12100", "content": "3 月 种 桃树 360 棵 ， 种 梨树 的 棵 树 是 桃树 的 2 倍 ， 种 的 苹果树 是 前 两种 树 总数 的 一半 ， 种 的 苹果树 有 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15006", "content": "一 辆 火车 2 小时 行驶 240 千米 ， 从 甲地 到 乙地 ， 需要 行驶 12 小时 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18027", "content": "一 个 工程队 修 一条 水渠 ． 5 天 修 了 45 米 ， 占 这 条 水渠 的 (1/4) ． 照 这样 计算 ， 修 完 水渠 共 需 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8789", "content": "(5/6) / (32/7) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1947", "content": "小 光 喜欢 看书 ， 一本 864 页 的 童话 书 他 用 18 天 就 看 完 了 ， 小 光 平均 每天 看 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3025", "content": "有 一个 平行四边形 果园 底 长 70 米 ， 高 30 米 ， 平均 每 20 平方米 种 一株 果树 ， 这个 果园 能 种 多少 株 果树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12039", "content": "某 款 书包 打 0.8 后 售价 是 120 元 ， 如果 打 0.6 出售 ， 这 款 书包 要 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3254", "content": "0.2 与 (1/6) 的 和 乘 (5/6) ， 结果 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13476", "content": "图书室 原来 有 802 本 故事书 ， 中午 借出 了 387 本 ， 下午 放学 前 还 回 295 本 ， 现在 图书室 里 有 故事书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22092", "content": "一 辆 汽车 (3/4) 小时 行 了 45 千米 ， 照 这样 计算 ， 2 小时 行 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19500", "content": "一 辆 汽车 行驶 6 千米 用 汽油 (3/5) 千克 ， 平均 每 千米 用 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9763", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行驶 了 全程 的 (4/5) ， 剩下 的 路程 如果 每 小时 行 40 千米 ， 5 小时 可 到达 ， 问 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15848", "content": "一 种 小麦 的 出粉率 是 85% ， 现有 这种 小麦 340 千克 ， 能 磨 出 面粉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15815", "content": "小 红 把 1000 元 钱 存入 银行 ， 整存整取 3 年 ， 年利率 是 3.24% ． 到期 时 小 红 可 得 本金 和 利息 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15108", "content": "3.8 - 2.54 + 1.46 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9802", "content": "江南 糖厂 去年 计划 产 糖 300 吨 ， 实际 比 计划 增产 20% ， 去年 实际 产 糖 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7880", "content": "张 爷爷 的 标签 上 写 着 80 片 ， 每片 10 克 ． 医生 的 药方 上 写 着 ， 每天 3 次 ， 每次 20 克 ， 这 瓶 药 张 爷爷 能 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21430", "content": "饲养场 养 了 300 只 鸡 ， 鸡 的 只 数 比 鸭 少 (3/5) ， 饲养场 养 了 多少 只 鸭 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21788", "content": "有 一个 数 加上 3 ， 再 乘以 5 ， 然后 减去 7 ， 最后 的 结果 等于 38 ， 这个 数 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19717", "content": "一 块 地 ， 其中 (1/5) 种 玉米 ， (1/6) 种 青菜 ， 其余 种 西瓜 ． 种 西瓜 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22822", "content": "张 大爷 家养 了 180 只 公鸡 和 240 只 母鸡 ， 还 养 了 60 只 鹅 ． 养 母鸡 的 只 数 是 鹅 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17276", "content": "立新 机床厂 3 月份 生产 机床 2600 台 ， 比 计划 多 生产 100 台 ， 超额完成 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12846", "content": "某 修路 队 6 小时 修路 384 米 ， 平均 每 小时 修路 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7205", "content": "一 只 绵羊 的 质量 是 58 千克 ， 一头 牛 的 质量 是 这 只 绵羊 质量 的 9 倍 多 20 千克 ， 这 头牛 的 质量 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10203", "content": "一 个 长方体 的 体积 是 160 m ^ 3 ， 长 8 m ， 宽 4 m ， 高 = 多少 m ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8555", "content": "一 批 水果 共 768 箱 ， 4 辆车 ， 3 次 运 完 这 批 水果 ． 平均 每辆 汽车 每次 运 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21613", "content": "水果店 运 来 苹果 和 梨 各 6 箱 ， 苹果 每箱 25 千克 ， 梨 每箱 20 千克 ， 一共 运 来 水果 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9479", "content": "芦山 乡 约 有 30000 人 ， 东江 乡 比 芦山 乡 约 少 10000 人 东江 乡 约 有 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1855", "content": "900 / 5 的 商 加上 25 ， 再 乘以 16 ， 结果 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4538", "content": "商店 运进 苹果 、 雪梨 、 香蕉 共 若干 千克 ． 其中 苹果 150 千克 ， 雪梨 170 千克 ， 香蕉 占 运进 水果 总量 的 (1/5) ． 香蕉 有 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15707", "content": "（ 附加 题 ） 小 明 读 一本 事故 书 ， 第一天 读 了 8 页 ， 以后 每天 比 前一天 多 读 3 页 ， 最后 一天 读 了 32 页 ， 正好 读完 ， 她 一共 读 了 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16466", "content": "6 （ 1 ） 班 一次 考试 的 平均 成绩 是 87.3 分 ， 经过 复查 发现 将 李 晓 莉 的 87 分 误 看作 了 78 分 计算 ． 经过 重新 计算 ， 该班 的 平均 成绩 是 87.48 分 ， 这个 班 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16816", "content": "两个 加数 的 和 比 一个 加数 大 10 ， 比 另 一个 加数 大 30 ， 这 两个 加数 的 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4384", "content": "一 件 上衣 128 元 ， 一条 裤子 61 元 ， 学校 要 为 12 名 旗手 购买 统一 的 服装 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16187", "content": "一 根 木料 长 10 米 ， 每 锯 一次 用 2 分钟 ． 每 5 米 锯 一段 ， 锯 多少 次 才能 锯 完 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2780", "content": "100 名 同学 共 收集 废品 96 千克 ， 平均 每人 收集 废品 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17683", "content": "在 2008 年 第 29 届 北京 奥运会 上 ， 法国 夺得 40 枚 奖牌 ． 我国 得到 的 奖牌数 比 法国 多 150% ． 我国 夺得 多少 枚 奖牌 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16953", "content": "一 根 绳子 剪 去 20% 后 又 接上 5 米 ， 结果 比 原来 短 (3/20) ， 现在 绳子 长 多少 米 ？ （ 不计 接头 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12431", "content": "巧克力 与 奶 的 质量 比 是 2 ： 9 ， 其中 巧克力 有 1.6 千克 ， 一共 能 调制 多少 千克 巧克力 奶 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10900", "content": "为 美化 校园环境 ， 学校 栽 了 39 棵 桂花树 ， 29 棵 松柏 ， 栽 的 樟树 的 棵 数 是 桂花树 和 松柏 总数 的 3 倍 ， 栽 了 多少 棵 樟树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13485", "content": "一 辆 卡车 计划 运 52 吨 货 ， 已经 运 了 7 次 ， 还 剩 20.5 吨 没有 运 ． 平均 每次 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6852", "content": "一 种 商品 0.7 销售 后 价格 降低 了 210 元 ， 现价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13560", "content": "小 红 看 一本 故事书 ， 第一天 看 了 20 页 ， 第 二 天 看 了 全书 的 25% ， 这时 已 看 的 和 没 看 的 比 是 9 ： 11 ． 这本 故事书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12662", "content": "实验 小学 5 （ 1 ） 班 有 男生 22 人 ， 女生 多少 人 ， 若 从中 任选 一 人 ， 则 选 到 男生 的 可能性 是 (11/20) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12608", "content": "某 商场 去年 上半年 出售 彩色 电视机 2050 台 ， 下半年 出售 彩色 电视机 的 台数 是 上半年 的 2 倍 少 1200 台 ． 该 商场 去年 共 出售 彩色 电视机 多少 台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2424", "content": "甲 仓 存粮 54 吨 ， 乙 仓 存粮 70 吨 ， 若 从 乙 仓 运出 多少 吨 放入 甲 仓 ， 则 甲 仓 的 存粮 是 乙 仓 的 3 倍 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20237", "content": "既 是 2 的 倍数 ， 又 含有 质因数 3 和 5 的 最小 自然数 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12534", "content": "甲 数 是 56 ， 是 乙 数 的 25% ， 求 乙 数 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8876", "content": "某 数 加上 26 ， 从 它们 的 和 中 减去 37 ， 再 用 17 去 乘 这个 差 ， 最后 用 48 去除 它们 的 积 ， 结果 商 是 50 余 14 ． 求 某 数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9731", "content": "甲 数 比 乙 数多 60% ， 求 乙 数 是 甲 数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16909", "content": "某 化工厂 由于 改进 设备 ， 日产量 由 原来 的 40 吨 增加 到 60 吨 ， 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1138", "content": "甲 袋 货物 的 (1/4) 与 乙 袋 货物 的 (3/5) 相等 ， 已知 甲 袋 重 288 千克 ， 乙 袋 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5872", "content": "12 个 多少 是 0.12 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23130", "content": "一 种 服装 原价 150 元 ， 打 0.7 后 ， 现在 售价 为 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5099", "content": "有 一桶 油 ， 第一次 倒 出 这 桶 油 的 40% ， 第 二 次 倒 出 剩下 的 (2/3) ， 还 剩 5 千克 ， 这 桶 油 的 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21999", "content": "甲 、 乙 两个 工程队 共同 铺设 一条 长 120 米 的 煤气管道 ， 经过 (5/3) 小时 完成 任务 ． 甲 工程队 平均 每 小时 铺设 32 米 ， 乙 工程队 平均 每 小时 铺设 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2219", "content": "一 堆 煤 204 吨 ， 用 去 120 吨 后 ， 剩下 的 每天 烧 42 吨 ， 还 可以 烧 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12293", "content": "桶 里 装有 一些 油 ， 用 去 了 60% ， 恰好 是 48 千克 ， 原来 桶 里 装有 多少 千克 的 油 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1777", "content": "甲 、 乙 两辆 汽车 从 两地 相向 而 行 ， 甲 车 每 小时 行 85 千米 ， 乙 车 每 小时 行 76 千米 ， 甲 车 开出 2 小时 后 ， 乙 车 才 开出 ， 又 过 了 4 小时 两车 相遇 ， 两地 间 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "892", "content": "某 修路 队 修 一段路 ， 原 计划 每天 修 480 米 ， 15 天 修 完 ， 实际 用 12 天 ， 实际 比 原 计划 每天 多 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8550", "content": "小 华 每分钟 打 80 个 字 ， 小 敏 2 分钟 打 的 字 等于 小 华 3 分钟 打 的 字 ． 小 敏 每分钟 比 小 华 多 打 几个 字 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18677", "content": "一 个数 加 (3/4) 的 和 是 5 的 (8/15) ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8515", "content": "5.6 的 (5/8) / 4.9 的 (10/7) ， 商 的 25% = ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8240", "content": "某 工程队 修筑公路 ， 前 3 天 共 修筑 4.48 千米 ， 后 7 天 平均 每天 修筑 1.36 千米 ． 这个 工程队 平均 每天 修筑公路 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8069", "content": "口袋 中 有 6 个 黄 球 和 若干个 白 球 ， 它们 除 颜色 外 完全相同 ， 从中 任意 摸 出 1 个 球 ， 若 摸 出 黄 球 的 可能性 是 (3/4) ， 则 口袋 中 白 球 有 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21966", "content": "菜 场上 的 鲫鱼 每千克 5.5 元 ， 买 一条 1.4 千克 的 鲫鱼 要 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19425", "content": "幼儿园 买来 苹果 和 橘子 各 10 筐 ， 苹果 每 筐 32 千克 ， 橘子 每 筐 20 千克 ， 买来 的 苹果 比 橘子 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5161", "content": "超市 运 来 苹果 450 箱 ， 第一天 卖出 其中 的 (1/3) ， 第 二 天 卖出 剩下 的 (2/5) ， 两天 共 卖出 多少 箱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7141", "content": "67 - 13 的 差 乘以 4 的 积 ， 再 加上 34 ， 结果 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7833", "content": "小巧 到 文具店 买 2 支 铅笔 和 6 本 练习簿 ， 共 付 5 元 ． 每支 铅笔 0.7 元 ， 每 本 练习薄 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14522", "content": "一 个数 的 (1/4) 是 50 ， 这个 数 的 (1/2) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2522", "content": "公园 举办 玫瑰花 展览 ， 红玫瑰 和 黄玫瑰 都 摆 了 15 行 ， 红玫瑰 每行 24 盆 ， 黄玫瑰 每行 26 盆 ， 红玫瑰 和 黄玫瑰 共摆 了 多少 盆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14308", "content": "希望 小学 计算机房 要 配置 25 台 学生 电脑 ， 每 台 690 元 ， 上级 拨款 15000 元 ， 还 差 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17446", "content": "学校 买来 42 包 练习本 ， 每包 20 本 ． 每班 分 56 本 ， 这些 练习本 能够 分给 几个 班 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21340", "content": "兔脚 有 100 只 ， 鸡脚 的 只 数 是 兔脚 只 数 的 60% ， 鸡兔 脚数 共 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8405", "content": "妈妈 把 10000 元 钱 存入 银行 ， 定期 一年 ， 年利率 是 2.25% ， 到期 时 妈妈 共 可以 取回 多少 元 ． （ 利息税 是 5% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "8512", "content": "张老师 家 上 月 用 去 的 水电费 比 本月 多 14 元 ， 本月 的 水电费 比 上 月 节约 (2/15) ， 上 月 用 去 水电费 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "467", "content": "明明 一家 去 旅游 ， 他们 先 坐 了 14 小时 的 火车 ， 又 坐 了 5 小时 的 汽车 后 到达 目的地 ． 已知 火车 的 速度 是 120 千米 / 时 ， 汽车 的 速度 是 60 千米 / 时 ． 求 这 段 路 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5297", "content": "少先队员 种 柳树 40 棵 ， 种 的 杨树 的 棵 数 比 柳树 棵 数 的 3 倍 多 15 棵 ． 少先队员 种 杨树 和 柳树 共 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16874", "content": "(1/7) + 12 的 (5/24) ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18272", "content": "甲队 有 120 人 ， 乙 队 比 甲队 少 (1/5) ， 乙 队 比 甲队 少 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2045", "content": "小 明 步行 上学 ， 每 分行 75 米 ． 小 明 离家 12 分钟 后 ， 爸爸 骑 自行车 去 追 ， 每分钟 行 375 米 ， 爸爸 出发 多少 分钟 后 能 追 上 小 明 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9637", "content": "一 个数 的 7 倍 比 82 的 50% 少 6 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5238", "content": "装配车间 要 装配 300 台 彩电 ， 已经 装配 了 180 台 ， 还 剩下 装配 任务 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10442", "content": "一 辆 自行车 降价 后 卖 了 168 元 ， 比 原价 降低 了 20% ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15157", "content": "一 个 圆锥 沿 底面 直径 把 它 锯 成 相等 的 两部 份 ， 截 成 的 面积 是 2.5 cm ^ 2 ， 圆锥 的 底面 直径 是 5 cm ， 高 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10448", "content": "有 一个 长 、 宽 、 高 分别 是 30 厘米 、 20 厘米 、 25 厘米 （ 从 里面 量 ） 的 长方体 容器 ， 盛 满 水 后 ， 倒入 一个 正方体 玻璃缸 ， 水面 高 6 厘米 ， 这个 正方体 玻璃缸 的 底 面积 = 多少 平方厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8227", "content": "修 一条 水渠 ， 原 计划 每天 修 0.24 km ， 实际 每天 比 原 计划 多 修 0.08 km ， 14 天 后 还 差 0.4 km 没 修 完 ， 这 条 水渠 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17203", "content": "徒弟 加工 零件 180 个 ， 比 师傅 加工 零件 个数 的 (3/4) 多 36 个 ， 师傅 加工 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16240", "content": "28 的 (1/4) - 5 ， 所得 差 被 (5/6) 除 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16750", "content": "某班 学生 的 (1/3) 参加 了 科技 兴趣小组 ， 另 有 班级 学生 的 (2/5) 参加 了 体育 兴趣小组 ， 问 没有 参加 这 两个 兴趣 组 的 学生 是 班级 总 人数 的 多少 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12591", "content": "甲 数 比 乙 数 少 (1/4) ， 乙 数 60 ， 甲 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6016", "content": "我们 学校 共有 男生 262 人 ， 女生 253 人 ， 全校 共有 学生 多少 人 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6213", "content": "一 个 车轮 的 直径 是 5 分 米 ， 转 2 圈 共 走 了 多少 分 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3272", "content": "一 士 多 店 平均 每天 售出 饮料 350 支 ， 这个 月 （ 按 31 天 计算 ） 共 售出 饮料 多少 支 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15941", "content": "ab 两车 同时 从 两地 相向 而 行 ， 经过 1.5 小时 ， a 车行 了 70 千米 ， b 车行 了 90 千米 ， 这时 两车 的 路程 占 两地 路程 的 (2/5) ． 两地 相距 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20158", "content": "5.04 与 4.05 的 差 乘以 88 ， 积 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5942", "content": "王 大伯 家养 了 20 只 鹅 ， 养鸭 的 只 数 是 鹅 的 5 倍 ， 养 的 鸭 比 鹅 多 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2907", "content": "一 桶 油 净重 80 千克 （ 不 含 桶 重 ） ， 倒 出 (1/4) ， 倒 出 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13271", "content": "数学 兴趣小组 有 15 人 ， 美术 小组 有 12 人 ， 两个 小组 的 人数 刚好 是 体育 小组 人数 的 (9/13) ， 体育 小组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14961", "content": "汽车 制造厂 要 生产 8400 辆 客车 ， 已经 生产 了 1400 辆 ， 剩下 的 要 35 天 完成 任务 ， 平均 每天 生产 多少 辆 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20799", "content": "王 叔叔 从 甲 城 到 乙 城 去 考察 ， 乘坐 速度 是 200 千米 / 时 的 动车组 列车 ， 需要 1.5 时 ． 如果 改乘 速度 是 120 千米 / 时 的 列车 ， 需要 多少 时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8926", "content": "一 件 上衣 原价 240 元 ， 现在 打 0.75 出售 ， 现价 比 原价 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13436", "content": "光明 小学 一年级 有 女生 120 人 ， 男生 占 总 人数 的 (4/9) ， 一年级 共有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16185", "content": "一 批 货物 ， 第一次 运走 (1/4) ， 第 二 次 运走 了 35% ， 若 已知 货物 总量 为 240 吨 ， 未 运走 的 货物 有 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4259", "content": "甲 、 乙 、 丙 3 人 的 步行 速度 分别 为 每分钟 70 米 、 60 米 和 50 米 ， 甲 从 b 地 ， 乙 和 丙 从 a 地 同时 出发 相向 而 行 ， 途中 甲 遇到 乙 后 2 分钟 又 遇到 丙 ， 求 a 、 b 两地 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "3366", "content": "比 的 前项 是 20 ， 比值 是 (5/8) ， 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21005", "content": "动物园 里 有 一只 东北虎 重 207 千克 ． 一头 野牛 的 体重 比 东北虎 的 3 倍 还 重 27 千克 ． 这 头 野牛 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18484", "content": "食堂 原来 有 400 千克 大米 ， 吃掉 的 是 剩下 的 (2/3) ． 还 剩 多少 千克 大米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18595", "content": "一 款 笔记本电脑 进货价 12000 元 ． 按 25% 的 利润率 定价 ， 售价 应 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12946", "content": "食品店 分装 糖果 ， 每 袋装 有 0.25 千克 酥糖 ， 装有 0.15 千克 水果糖 ． 当 水果糖 用 去 5.4 千克 时 ， 酥糖 用 去 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "198", "content": "王 乐 和 张 强 两 人 从 相距 2280 米 的 两地 相向 而 行 ， 王 乐 每分钟 行 60 米 ， 张 强 每分钟 行 80 米 ， 王 乐 出发 3 分钟 后 张 强 才 出发 ， 张 强 出发 几分钟 与 王 乐 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19216", "content": "用 3000 粒 种子 做 发芽 实验 ， 有 10% 没有 发芽 ， 有 多少 粒 种子 发 了 芽 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3568", "content": "一 条 裤子 30 元 ， 一件 衣服 的 价钱 是 一条 裤子 的 4 倍 ． 这 套 服装 共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17041", "content": "1 + 2 + 3 + 4 + 5 + 6 + 7 + … + 99 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13233", "content": "截至 目前为止 ， 四川 地震 灾区 教育 项目 实际 投资 约 250 万元 ， 比 计划 多 投资 50 万元 ， 多 投资 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3305", "content": "小 红 的 姐姐 带 了 一些 钱 去 买 练习本 ， 如果 买 0.3 元 一本 的 可以 买 24 本 ， 如果 买 另 一种 练习本 ， 每 本 要 多 花 0.1 元 ， 那 她 所 带 的 钱 可以 买 多少 本 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6225", "content": "甲 数 是 (7/2) ， 它 的 (3/5) 乙 数 的 75% 正好 相等 ． 求 乙 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19788", "content": "许 老师 步行 上班 ， 她 每分钟 走 75 米 ， 从 家 到 学校 共用 了 25 分钟 ， 其间 在 路上 买 报纸 花 了 2 分钟 ， 许 老师 家 离 学校 有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9367", "content": "学校 航模 小组 有 25 人 ， 是 舞蹈 组 人数 的 (5/7) ， 舞蹈 组 的 人数 是 书法 组 的 (7/8) ， 书法 组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13885", "content": "一 列 火车 3 小时 行 了 276 千米 ， 照 这样 的 速度 ， 再行 16 小时 ， 共 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11606", "content": "一 种 电子产品 ， 原价 每 台 5000 元 ， 现在 降低 到 3000 元 ． 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15665", "content": "357 / 7 的 商 ， 加上 1000 与 0.875 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10493", "content": "某校 存 煤 320 吨 ， 16 天 正好 烧 了 总数 的 (4/5) ， 照 这样 计算 ， 这些 煤 还 可以 烧 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4000", "content": "李 兰 8 ： 00 从 家 步行 到 学校 ， 如果 每分钟 行 65 米 ， 15 分钟 到校 ， 现在 她 想 提前 2 分钟 到校 ， 每分钟 应 行 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5826", "content": "一 列 火车 长 180 米 ， 每秒钟 行 22 米 ， 全 车 通过 1140 米 的 山洞 ， 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19518", "content": "一 份 稿件 ， 甲 打字员 每天 打 它 的 (1/8) ， 多少 天 可以 打 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21385", "content": "超市 运 来 土豆 和 地瓜 各 200 袋 ， 每 袋 土豆 重 35 千克 ， 每 袋 地瓜 重 25 千克 ． 这些 土豆 和 地瓜 共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20055", "content": "小 芳 和 小 丽 同时 从 家 出发 ． 小 芳 每分钟 走 70 米 ， 小 丽 每分钟 走 60 米 ， 经过 了 15 分钟 ， 两 人 在 少年宫 相遇 ． 请问 ： 她们 两家 应该 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18519", "content": "学校 航模 小组 有 男生 48 人 ， 比 女生 多 17 人 ． 女生 有 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10169", "content": "一 个 长方形 的 长 是 14 厘米 ， 宽 为 2 厘米 ， 则 周长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12647", "content": "果 果 今年 身高 85 厘米 ， 比 去年 高 5 厘米 ， 果 果 身高 增高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22418", "content": "一 件 羊毛衫 打 0.8 出售 ， 便宜 了 42 元 ， 这件 羊毛衫 折 后 价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13227", "content": "某班 同学 分成 若干组 去 植树 ， 若 每组 植树 n 棵 ， 且 n 为 质数 ， 则 剩下 树苗 20 棵 ， 若 每组 植树 9 棵 ， 则 还 缺少 2 棵 ， 这个 班 的 同学 共 分成 几组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15008", "content": "一 块 试验田 的 (2/3) 种 水果 ， 而 种 西瓜 的 试验田 又 是 水果 田 的 (2/7) ， 那么 种 西瓜 的 田 占 总 试验田 的 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17618", "content": "丰华 农场 种 玉米 与 水稻 的 比 是 8 ： 11 ． 已知 种 水稻 的 面积 比 种 玉米 多 24 公顷 ， 种 玉米 多少 公顷 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5041", "content": "仓库 里 有 一批 货物 ， 第一天 运出 210 吨 ， 第 二 天 运出 货物 总数 的 (1/6) ， 这时 剩下 货物 与 运出 货物 的 比 为 1 ： 3 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19879", "content": "金山 小学 四年级 有 男生 153 人 ， 女生 135 人 ， 平均 48 人 一个班 ， 四年级 一共 有 多少 个 班 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19395", "content": "一 种 压路机 的 前轮 是 圆柱 形状 的 ， 轮 宽 1.5 米 ， 直径 1.2 米 ． 前轮 每分钟 滚动 20 周 ， 压路机 10 分钟 的 压路 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "2230", "content": "一 辆 汽车 从 甲 城 到 乙 城 需要 16 时 ， 行驶 的 速度 是 78 千米 / 时 ， 返回 时 用 了 12 小时 ， 求 返回 时 的 速度 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2752", "content": "小强 今年 11 岁 ， 爸爸 的 年龄 比 他 的 3 倍 还 多 4 岁 ． 爸爸 今年 几岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3627", "content": "一 个 长方体 水池 的 容积 是 5600 升 ， 这个 水池 的 底面 是 一个 长 为 40 分 米 ， 宽 为 20 分 米 的 长方形 ， 求 水池 的 高 = 多少 分 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1322", "content": "2006 * (2004/2005) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20999", "content": "一 列 火车 从 甲地 开往 乙地 ， 已经 行驶 了 全程 的 (1/4) ， 距离 乙地 还有 270 千米 ， 甲乙 两地 之间 的 铁路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22508", "content": "爸爸 在 家俱 店 购买 了 4 把 椅子 ， 付给 营业员 100 元 ， 找回 了 8 元 ． 每 把 椅子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21916", "content": "根据 “ 白兔 的 只 数 是 灰 兔 的 45% ” ， 可以 把 多少 看作 单位 “ 1 ” ， 白兔 的 只 数 比 灰 兔 少 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6862", "content": "(5/12) - (7/18) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14422", "content": "为 支援 洪涝 受灾 学校 小学生 的 学习 ， 实验 小学 学生 开展 捐书 活动 ． 四年级 捐 125 本 ， 五年级 比 四年级 多 捐 30 本 ， 六年级 捐 的 本 数 是 五年级 的 3 倍 ． 实验 小学 六年级 学生 捐书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18417", "content": "一 高速公路 对 小车 的 收费 标准 是 每 千米 0.5 元 （ 包含 隧道 ） ， 此外 还要 加收 隧道 通行费 20 元 ． 一 小车 从 甲地 到 乙地 共 行 了 78.4 千米 （ 包含 隧道 ） ， 共 要 交费 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13823", "content": "学校 计划 投资 7200 元 举办 才艺 展示 活动 ， 实际 的 费用 比 计划 节约 了 (3/8) ， 实际 的 费用 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20531", "content": "杨 教授 要领 稿费 4300 元 ， 根据 有关 规定 ， 超过 800 元 的 应 按 收入 的 5% 交 个人所得税 ， 他 应 交税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15097", "content": "水果店 第一天 运进 猕猴桃 203 只 ， 第 二 天 又 运进 了 157 只 ． 如果 把 这些 猕猴桃 每 30 只 装 一箱 ， 可以 装 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13609", "content": "今年 栽树 240 棵 ， 比 去年 多 栽 20% ， 去年 栽 了 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7751", "content": "甲乙 两桶 油 ， 甲 桶 油 的 重量 是 乙 桶 油 的 (2/3) ， 乙 桶 油 比 甲 桶 油 多 5 千克 ， 乙 桶 油 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13991", "content": "用 3 个 鹅蛋 能 换 9 个 鸡蛋 ， 2 个 鸡蛋 能 换 4 个 鸽子 蛋 ， 用 8 个 鹅蛋 能 换 多少 个 鸽子 蛋 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19452", "content": "工地 有 一批 水泥 ， 第一天 运走 总数 的 35% ， 第 二 天 运走 总数 的 (2/5) ， 还 剩下 28 吨 ， 这 批 水泥 原有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17323", "content": "135 与 216 的 和 除以 9 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19428", "content": "两列 火车 同时 从 相距 800 千米 的 两站 相对 开出 ， 8 小时 后 相遇 ， 其中 一列 火车 每 时 行 55 km ， 另 一列 火车 每 时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "604", "content": "奶奶 养 了 60 只 兔子 ， 其中 有 25% 是 黑 兔 ， 其余 的 都 是 白兔 ， 奶奶 养 了 多少 只 白兔 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7423", "content": "208 * 23 与 67 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16139", "content": "王经理 一个月 的 工资 是 1800 元 ， 按规定 ， 减去 1600 元 后 的 部分 要 按 5% 的 税率 缴纳 个人所得税 ． 他 每月 实 得 工资 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5795", "content": "果园 里 种 梨树 18 行 ， 每行 35 棵 ， 苹果树 25 行 ， 每行 32 棵 ． 果园 里 共有 果树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9238", "content": "人体 共有 206 块 骨头 ， 其中 手骨 的 块 数 占 全身 的 (27/103) ， 手指 骨 的 块 数 又 是 手骨 的 (14/27) ． 人体 的 手指 骨 有 多少 块 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4363", "content": "小 明 和 小强 两 人 集邮 ， 小 明 集邮 35 张 ， 小强 的 邮票 比 小 明 的 3 倍 多 2 张 ， 小强 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9591", "content": "实验 小学 5 （ 1 ） 班 共有 学生 45 人 ， 其中 参加 科技 小组 的 占 全班 人数 的 (1/5) ， 参加 体育 小组 的 占 全班 人数 的 (3/10) ， 剩下 的 学生 参加 阅读 小组 ， 参加 阅读 小组 的 占 全班 人数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2035", "content": "一 个 用 塑料薄膜 覆盖 的 蔬菜 大棚 ， 长 15 米 ， 横截面 是 一个 半径 2 米 的 半圆 ． 大棚 内 的 空间 大约 有 多 大 ？", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "5106", "content": "一 辆 汽车 要 运 89 吨 货物 ， 上午 运走 31.5 吨 ， 其余 的 下午 分 5 次 运 完 ， 下午 平均 每次 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13366", "content": "小 红 上 月 买 书 花 了 30 元 ， 占 总支出 的 20% ， 小 红 上个月 一 共用 了 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22464", "content": "一 辆 汽车 行 1 千米 路 要 耗油 (5/36) 千克 ， 现在 从 甲地 开 到 相距 180 千米 的 乙地 ， 一共 要 耗油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3836", "content": "甲 、 乙 两个 工程队 共同 修 一条 公路 ， 甲队 每天 修 62.5 米 ， 乙 队 每天 修 77.2 米 ， 10 天 完成 任务 ． 这 条 公路 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "407", "content": "小 华 每次 回家 上楼 要 走 108 个 台阶 ， 她 每 上 一层楼 要 走 18 个 台阶 ． 小 华 的 家住 在 几层楼 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17060", "content": "某班 一次 数学考试 平均 分数 为 70 分 ， 及格率 75% ， 及格 学生 的 平均 分数 为 80 ， 那么 不及格 学生 的 平均 分数 为 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18653", "content": "冰箱 厂 要 装配 1800 台 电冰箱 ， 装配 了 6 天 ， 平均 每天 装配 220 台 ， 还要 装配 多少 台 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2097", "content": "一 个 电视机厂 前年 生产 电视机 9600 台 ， 去年 比 前年 增产 20% ， 去年 生产 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13264", "content": "杯 里 装 100 克 糖水 ， 其中 糖 占 20% ， 向 杯 里 再 加入 多少 克 水 后 ， 这时 糖 占 糖水 的 5% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3987", "content": "西部 大 开发 中 ， 修筑 铁路 时 ， 很多 地方 物资 得 靠 畜力 运送 ． 王 叔叔 和 某 工程队 定下 协议 ， 每 运送 一包 水泥 到 目的地 付 16 元 ， 上个月 他 用 自家 的 骡子 为 工程队 运送 了 725 包 水泥 ， 工程队 应付 他 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17953", "content": "一 个 会议厅 有 8 根 圆柱形 的 大柱子 ， 柱子 的 底面 周长 2.5 米 ， 高 5 米 ； 按 1 千克 油漆 可 漆 4 平方米 计算 ， 漆 完 这些 柱子 要 用 多少 千克 油漆 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3934", "content": "一 件 西服 原价 180 元 ， 现在 的 价格比 原来 降低 了 (1/5) ， 现价 比 原价 便宜 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16259", "content": "3 张 办公桌 比 5 把 椅子 的 价钱 贵 50 元 ． 每张 办公桌 130 元 ， 每 把 椅子 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14911", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 时 行 60 千米 ， 8 时 到达 ． 如果 每 时 行 80 千米 ， 几时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17435", "content": "完成 一项 工程 ， 甲队 要 20 天 ， 乙 队 要 30 天 ， 丙 队 要 15 天 ， 甲队 先 修 8 天 后 3 队 合作 ， 还 需 多少 天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "13882", "content": "一 块 菜地 共 (11/12) 公顷 ， 种 茄子 的 面积 占 这块 地 的 (1/3) ， 种 黄瓜 的 面积 占 这块 地 的 (1/6) ， 其余 的 种 青菜 ． 种 青菜 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15527", "content": "修路 队 修 一条 长 1500 米 的 公路 ， 已经 修好 了 300 米 ， 剩下 的 要 在 6 天 修 完 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9460", "content": "一 辆 汽车 从 a 地 到 b 地 ， 每 小时 行 48 千米 ， 10 小时 到达 ． 返回 时 ， 只用 了 8 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10057", "content": "小 明 带 了 20 元 钱 去 超市 买 文具 ， 用 去 了 13.5 元 ， 小 明 还有 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4032", "content": "在 环形 湖 路上 每隔 10 米 放置 1 个 垃圾桶 ， 共 放 了 30 个 ． 环湖 长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22549", "content": "在 某市 关于 出租车 降价 的 听证会 上 ， 有 一个 出租车 报 的 收费 标准 是 ： 起步价 5 元 ， 超过 3 千米 ， 则 超过 部分 每 千米 1.8 元 ． 按照 这个 方案 若 支付 了 23 元 钱 ， 则 可 乘坐 多少 千米 行程 的 出租车 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "501", "content": "新世纪 百货 开展 “ 庆 6 一 ” 促销 活动 ， 一种 童鞋 的 价格下降 20% 后 再 降 8 元 ， 这时 的 价格 是 56 元 ． 这种 童鞋 的 原价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8347", "content": "一 个数 的 (3/5) 是 60 ， 这个 数 的 (7/10) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16838", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 平均 每 小时 行驶 80 千米 ． 行驶 3 小时 后 ， 离 乙 城 还有 240 千米 ． 甲乙 两城 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10821", "content": "马 庄 中心小学 五年级 有 学生 160 人 ， 六年级 的 学生 人数 比 五年级 多 (1/5) ． 五年级 比 六年级 少 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8187", "content": "一 袋 米 30 千克 ， 第一周 吃 了 40% ， 第 二 周 吃 了 50% ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20268", "content": "一 个数 减去 它 的 15% 后 再 乘 (5/34) ， 积 是 (1/8) ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3554", "content": "一 个 口袋 里 有 5 个 黑 球 ， 8 个 白 球 ， 9 个 红球 ， 2 个 蓝球 ， 一次 至少 取出 多少 个 球 才能 保证 至少 有 一个 红球 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "983", "content": "一 段 铁丝 长 8 米 ， 它 的 (1/2) = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6138", "content": "甲 数 是 60 ， 乙 数 是 甲 数 的 120% ， 乙 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18524", "content": "建筑工人 修 一条 水渠 ， 第一天 修 了 60 米 ， 刚好 修 了 这 条 水渠 的 (2/15) ， 这 条 水渠 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13133", "content": "学校 买来 5 盒 羽毛球 ， 每盒 12 只 ． 用 去 20 只 ， 还 剩下 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8304", "content": "甲 数 的 (3/4) 是 乙 数 的 (5/8) ， 甲 数 是 80 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12887", "content": "某 工厂 计划 生产 26500 个 零件 ， 前 5 天 平均 每天 生产 2180 个 零件 ， 由于 技术革新 每天 比 原来 多 生产 420 个 零件 ， 完成 这 批 零件 一共 需要 多少 天 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3004", "content": "含盐 15% 的 盐水 30 千克 ， 稀释 成 含盐 5% 的 盐水 后 ， 这时 盐水 有 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8026", "content": "欢乐谷 正 天 电影院 有 13 排座位 ， 第一排 有 42 个 座位 ， 后 一排 总 比 前 一排 多 4 个 座位 ， 求 最后 一排 有 多少 个 座位 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18642", "content": "3 台 拖拉机 4 小时 耕地 17.04 公顷 ， 每 台 拖拉机 平均 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8230", "content": "王老师 买 20 把 尺子 ， 付出 15 元 ， 找回 1.6 元 ， 每 把 尺子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "896", "content": "一 个数 的 (3/8) 是 24 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13101", "content": "一 个数 的 39 倍 是 2535 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22907", "content": "叔叔 一个月 收入 3600 元 ， 按规定 减去 2000 元 后 的 部分 按 40% 的 税率 缴纳 个人所得税 ， 叔叔 一个月 应该 缴纳 多少 元 个人所得税 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17582", "content": "学校 买 了 4 盒 钢笔 ， 每盒 10 枝 ， 每枝 16 元 ． 一 共用 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10307", "content": "练一练 ： 甲乙 两 人 在 相距 12 千米 的 ab 两地 同时 出发 ， 同 向 而 行 ． 甲 步行 每 小时 行 4 千米 ， 车 在 后面 ， 每 小时 速度 是 甲 的 3 倍 ． 几小时 后 乙 能 追 上 甲 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5965", "content": "一 种 手提电脑 现在 每 台 8700 元 ， 比 原价 降低 (2/5) ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19153", "content": "木工 师傅 要 把 一根 长 2.4 米 的 木条 锯 成 0.6 米 的 小 木条 ， 如果 每 锯 一段 要 3 分钟 ， 把 这根 木条 锯 完 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5350", "content": "把 一块 棱 长 8 厘米 的 正方体 钢坯 ， 锻造 成长 16 厘米 ， 宽 5 厘米 的 长方体 钢板 ， 这 钢板 有 多 厚 ？ （ 损耗 不计 ）", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21350", "content": "一 辆 汽车 3 小时 行 了 全程 的 (3/5) ， 它 每 小时 行 全程 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12333", "content": "某 工厂 采用 新 技术 后 ， 每天 用 煤 14 吨 ． 这样 原来 7 天 用 的 煤 ， 现在 可以 用 10 天 ， 这个 厂 现在 比 过去 每天 节约 多少 吨 煤 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14035", "content": "一 种 中成药 有 300 粒 ， 如果 每次 吃 15 粒 ， 每天 吃 2 次 ， 这些 药 能 吃 多少 天 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16501", "content": "王老师 这个 月工资 为 2600 元 ， 如果 按 国家 规定 ， 工资 在 1600 元 以上 的 部分 应 缴纳 5% 的 个人 取得 税 ， 王老师 这个 月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2442", "content": "师徒 二 人 用 (25/4) 小时 合作 完成 了 925 个 零件 ， 已知 师傅 每 小时 生产 78 个 ， 徒弟 每 小时 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15405", "content": "小 红 买 了 9 枝 钢笔 ， 一共 花 了 63 元 钱 ， 平均 每枝 钢笔 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1991", "content": "有 (9/10) 吨 煤 ， 每次 运走 它 的 (1/10) ， 多少 次 才能 运 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3581", "content": "王 霞 买来 一本 140 页 的 故事书 ， 已经 看 了 86 页 ． 剩下 的 计划 6 天 看 完 ， 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14649", "content": "甲 、 乙 两 人 分别 从 两地 同时 出发 相向 而 行 ， 甲 每 小时 走 6 千米 ， 比 乙 每 小时 多行 2 千米 ， 两 人 经过 3 小时 相遇 ． 求 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13842", "content": "62 千克 稻谷 出 了 46.5 千克 大米 ， 平均 每千克 稻谷 可以 出 多少 千克 大米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6326", "content": "一 个数 的 (2/3) 比 60 的 75% 多 55 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22566", "content": "学校 买来 排球 25 个 ， 买来 的 足球 比 排球 多 (3/5) ， 两种 球 一共 买来 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7929", "content": "甲 、 乙 两 人 同时 从 东 镇 到 西 镇 ， 当 甲 走 了 全程 的 (2/5) ， 乙 只 走 了 9.6 千米 ， 当 甲 到 达西 镇 时 ， 乙 距 西 镇 还有 全程 的 (3/11) ． 求 东西 两 镇 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4499", "content": "芳 芳 家 4 月份 用水 13.4 吨 ， 比 上个月 节约 了 1.6 吨 ， 芳 芳 家 上个月 用水 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6714", "content": "华华 过生日 ， 买 了 一个 周长 为 48 厘米 的 圆形 蛋糕 ， 在 它 的 4 周 每隔 4 厘米 插 上 一根 小 蜡烛 ． 共 插 了 多少 根 蜡烛 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7223", "content": "吉普车 2 小时 行驶 120 千米 ， 客车 3 小时 行驶 210 千米 ， 客车 每 小时 比 吉普车 多行 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3247", "content": "小 明 读 一 本书 ， 第一天 读 了 20 ， 第 二 天 读 的 页数 是 第一天 的 (9/10) ， 两天 读 了 这 本书 的 (19/40) ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9940", "content": "某 小学 为 文艺演出 选送 节目 ， 要 从 4 个 舞蹈 节目 中 选出 1 个 ， 3 个 合唱 节目 中 选出 2 个 ． 一共 有 多少 种 选送 方案 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7099", "content": "学校 买 回 7 个 书架 ， 每个 书架 4 层 ， 每层 放 24 本书 ， 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5715", "content": "10 / (5/9) 的 商 加上 (1/6) * 4 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17603", "content": "把 一个 长 、 宽 、 高 分别 是 5 cm 、 4 cm 、 3 cm 的 长方体 切成 两个 完全 一样 的 长方体 后 ， 表面积 最 多 增加 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16566", "content": "书架上 有 6 本 不同 的 画报 、 10 本 不同 科技 书 ， 请 你 每次 从 书架 上任 取 一本 画报 、 一本 科技 书 ， 共有 多少 种 不同 的 取法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17676", "content": "一 个数 的 倒数 是 (8/9) ， 这个 数 的 (1/3) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8503", "content": "甲乙 两城 相距 2590 千米 ． 两架 飞机 同时 从 两城 相对 飞 出 ， 经过 2 小时 相遇 ， 一架 飞机 每 小时 飞行 650 千米 ， 另 一架 每 小时 飞行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9647", "content": "林 老师 编写 了 一本 《 趣味 数学 故事 》 ， 获得 稿费 3800 元 ， 按规定 ， 一次 稿费 超过 800 元 部分 应 按 14% 的 税率 纳税 ． 林 老师 应 缴纳 税款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4856", "content": "将 100 克 浓度 为 10% 的 酒精 和 60 克 浓度 为 8% 的 酒精 混合 后 ， 新 酒精 的 浓度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19653", "content": "某校 去年 在校学生 有 2850 人 ， 今年 比 去年 减少 了 20% ． 这个 校 今年 在校学生 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17341", "content": "学校 举办 校庆 活动 ， 据统计 上午 来校 参观 的 人数 是 1089 人 ， 参观 后 有 455 人 离开 ， 下午 又 有 267 人 到校 参观 ， 现在 在校 参观 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8551", "content": "小强 每天 锻炼身体 ， 绕 操场 跑 5 圈 ， 每圈 200 米 ， 那么 他 每天 跑 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14492", "content": "某 车间 原有 锌 和 铜 共 84 千克 ， 现在 要 把 锌 和 铜 按 1 ： 2 熔铸 成 一种 合金 ， 需要 添加 12 千克 铜 ． 原有 铜 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3524", "content": "王 丽 做 了 38 面 黄旗 ， 李 明 做 了 22 面 红旗 ， 他俩 一共 做 了 旗子 总数 的 (1/3) ， 这次 一共 要 做 多少 面 旗子 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18505", "content": "一 台 彩电 ， 现价 1800 元 ， 比 原来 降低 了 (1/6) ， 原来 的 售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "135", "content": "张 阿姨 打 一份 稿件 ， 打 了 一些 后 ， 已 打 页数 与 剩下 页数 的 比 是 1 ： 4 ， 又 打 了 25 页 ， 此时 已 打 页数 与 剩下 页数 的 比 是 3 ： 7 ． 这份 稿件 共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7034", "content": "水果 超市 运 来 苹果 25 筐 ， 每 筐 45 千克 ， 运 来 香蕉 20 筐 ， 每 筐 50 千克 ． 运 来 的 苹果 比 香蕉 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1636", "content": "用 一根 52 厘米 长 的 木条 ， 恰好 可以 做 一个 长 6 厘米 ， 宽 4 厘米 ， 高 多少 厘米 的 长方体 木框 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1456", "content": "学校 夏令营 组织 行军 训练 ， 原 计划 3 小时 走 完 12.3 千米 ， 实际 2.5 小时 走 完 原定 路程 ． 实际 平均 每 小时 比 原 计划 多 走 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2869", "content": "玩具店 今天 卖 了 8 个 同样 的 溜溜球 ， 每个 卖 45 元 ， 共赚 了 160 元 ． 每个 溜溜球 的 进货价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22175", "content": "一 本书 第一天 看 了 (1/3) ， 第 二 天 看 的 比 第一天 多 3 页 ， 还 剩 5 页 没 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4839", "content": "在 某 地区 ， 夏季 高山 上 的 温度 从 山脚 起 每 升高 100 米 平均 降低 0.8 ℃ ， 已知 山脚 的 温度 是 24 ℃ ， 山顶 的 温度 是 4 ℃ ， 试 求 这 座 山 的 高度 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18104", "content": "国庆 期间 ， 杭州 大厦 店 庆 回馈 活动 一律 商品 降价 20% ， 妈妈 有 优惠 金 卡 ， 还 可以 再 打 0.9 ． 妈妈 看中 一件 “ 艾 莱 依 ” 长 款 羽绒服 标价 1780 元 ， 最终 应付 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18341", "content": "一 个数 的 (3/4) 是 18 的 (4/3) 倍 ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "439", "content": "甲乙 两地 相距 720 千米 ， 两辆 汽车 分别 从 两地 相向 出发 ． 客车 每 小时 行 40 千米 ， 货车 每 小时 行 32 千米 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13236", "content": "工人 运输 2000 块 玻璃 ， 按规定 每块 玻璃 运费 2 元 ， 损坏 一块 不但 不 给 运费 ， 反而 要 赔偿损失 10 元 ， 运 完 这 批 玻璃 后 ， 工人 共赚 了 3400 元 ． 他们 共 损坏 了 多少 块 玻璃 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "338", "content": "一 个 因数 缩小 3 倍 ， 另 一个 因数 缩小 2 倍 ， 积 变为 120 ， 原来 的 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7814", "content": "两列 汽车 分别 从 甲 、 乙 两城 相对 开出 ， 速度 保持 不变 ， 行驶 3 小时 后 两车 相距 320 千米 ， 如果 再 行驶 2 小时 ， 则 两车 相遇 ． 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4945", "content": "李 叔叔 每 小时 加工 6 个 零件 ， 7 小时 加工 的 零件 数 ： 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3553", "content": "2007 年 全国 铁路 第 6 次 大提速 ， 一列 火车 从 上海 开往 北京 每 小时 行驶 200 千米 ， 7.5 小时 可以 到达 ， 比 原来 快 了 4.5 小时 ， 这 列 火车 原来 每 小时 行驶 多少 千米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6553", "content": "弟弟 看 一本 故事书 ， 已经 看 了 36 页 ， 比 没 看 的 多 27 页 ， 看 的 页数 是 没 看 的 几倍 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17636", "content": "新星 农场 在 一块 地里 培育 果树 苗 ． 这块 地 的 (1/4) 栽 桃树 ， (2/5) 栽 梨树 ， 其余 的 栽 苹果树 ． 苹果树 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18611", "content": "甲乙 两包 糖 的 重量 比 是 4 ： l ， 如果 从 甲 包 取出 10 克 放入 乙 包 后 ， 甲乙 两包 糖 的 重量 比 变为 3 ： 2 ． 那么 两包 糖 重量 的 总和 = 多少 克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15333", "content": "水果店 昨天 运 来 西瓜 354 个 ， 今天 又 运 来 6 筐 西瓜 ， 每 筐 有 8 个 西瓜 ， 两天 共运 来 多少 个 西瓜 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17300", "content": "厦门 园 博 苑 座落在 集美 中洲 岛 ， 规划 总面积 约 7 平方千米 ， 其中 水面 面积 约 占 (11/20) ． 园 博 苑 的 水面 面积 约 多少 平方千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13479", "content": "7 年级 同学 集邮 ， 红红 收集 了 90 张 ， 比 明明 多 收集 了 20% ， 明明 又 比 兰兰 少 收集 了 25% ， 兰兰 收集 了 多少 张 邮票 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1590", "content": "一 个数 的 4.8 倍 是 24 ， 这个 数 的 10 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10342", "content": "一 段 长方体 钢材 ， 长 16 分 米 ， 高 3 分 米 ， 厚 2 分 米 ， 每 立方分米 钢材 重 7.8 千克 ， 这 段 钢材 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "10662", "content": "一 辆 汽车 从 某城 去 省城 ， 走 高速公路 的 速度 是 90 千米 / 小时 ， 用 了 2 小时 ， 返回 时 走 普通 公路 的 速度 是 70 千米 / 小时 ， 用 了 3 小时 ， 走 普通 公路 比 走 高速公路 多 走 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4165", "content": "副食店 原来 有 5 桶 色拉油 共 重 75 千克 ， 又 运 来 18 桶 ， 店里 运 来 多少 千克 色拉油 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3575", "content": "某 饭店 的 一盘 西红柿 炒鸡蛋 ， 用 去 鸡蛋 0.2 千克 ， 每千克 8 元 ， 用 去 西红柿 0.4 千克 ， 每千克 4 元 ， 调料 约 0.8 元 ， 利润 占 成本 的 150% ， 这 盘 西红柿 炒鸡蛋 应 售 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "8095", "content": "一 张 椅子 40 元 ， 一张 桌子 是 一张 椅子 的 3 倍 ， 一套 桌椅 共 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22231", "content": "6 个 475 + 4 个 175 ， 结果 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20452", "content": "一 个 等腰 梯形 ， 它 的 上 底 长 6.5 厘米 ， 下 底 长 8.5 厘米 ， 腰 长 为 4 厘米 ． 这个 梯形 的 周长 = 多少 厘米 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21685", "content": "一 个数 的 (3/5) 是 30 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11839", "content": "在 读书 活动 中 ， 小强 读 一 本书 ， 全书 共 136 页 ， 已 读 了 全书 的 25% ， 还 剩 多少 页 没有 读完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5065", "content": "一 个数 的 5 倍 是 605 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6565", "content": "洗衣机 厂 去年 生产 洗衣机 5400 台 ， 比 计划 多 生产 600 台 ， 实际 比 计划 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8315", "content": "体育场 的 环形 跑道 长 400 米 ， 小 刚 和 小 华 在 跑道 的 同一 起跑线 上 ， 同时 向 相反 方向 起跑 ， 小 刚 每分钟 跑 152 米 ， 小 华 每分钟 跑 148 米 ． 多少 分钟 后 他们 第 3 次 相遇 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10367", "content": "一 套 科幻 书 原价 90 元 ， 元旦 期间 0.8 优惠 ， 李老师 一共 买 了 3 套 ， 平均 每套 便宜 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3940", "content": "小 丁丁 带 了 60 元 钱 去 买 电影票 ， 一共 买 了 4 张 儿童票 ， 售票员 找 给 他 8 元 ， 儿童票 多少 元 一张 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4706", "content": "（ 111 * 58 - 148 * 16 ） / 37 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20213", "content": "小 明 今年 8 岁 ， 王老师 今年 32 岁 ， 王老师 的 年龄 是 小 明 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19783", "content": "小 青 的 体重 是 36 千克 ， 相当于 小 红 体重 的 (6/7) ． 小 红 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5881", "content": "小 圆 半径 2 厘米 ， 大圆 半径 5 厘米 ， 它们 的 周长 相差 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9959", "content": "一 只 羊 重 25 千克 ， 一头 牛 的 重量 是 一只 羊 的 14 倍 ， 一头 牛 比 一只 羊 重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21530", "content": "把 一根 粗细 均匀 的 木头 锯 成 2 段 需要 的 时间 是 5 分 ， 现 要 锯 成 4 段 需 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16701", "content": "计算 ： (2/7) - (1/14) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20783", "content": "甲 仓 存粮 128 吨 ， 乙 仓 存粮 132 吨 ， 甲乙 两 仓 的 存粮 共 分 5 次 运 完 ， 平均 每次 运粮 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8119", "content": "甲 的 (5/8) 是 乙 ， 甲 是 24 ， 甲 比 乙 多 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18887", "content": "某 小学 有 女生 240 人 ， 男生 比 女生 的 1.2 倍 少 18 人 ， 全校 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9082", "content": "小 丽 看 一本 故事书 ， 计划 每天 看 20 页 ， 30 天 看 完 ， 实际 每天 看 25 页 ． 可以 提前 几天 看 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20609", "content": "比 9 多 81 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3998", "content": "李师傅 和 小张 装配 同 一种 仪器 ． 李师傅 7 天 装配 119 台 ， 小张 5 天 装配 115 台 ． 小张 比 李师傅 每天 多 装配 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9463", "content": "作文 薄 每页 30 行 ， 小 杰 写 了 1 页 又 12 行 ， 每行 25 个 字 ． 一共 写 了 多少 个 字 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19856", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 的 是 第一天 的 (1/3) ， 还 剩 这 本书 的 几分 之 几 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20017", "content": "小 明 看到 河堤 上 有 一排 柳树 ， 每隔 4 米 一棵 ， 他 从 身边 的 一棵 走 到 第 20 棵 树 下 ， 他 共 走 了 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22247", "content": "甲 、 乙 两艘 轮船 同时 从 相距 224 千米 的 东西 两 港 相对 出发 ， 已知 甲 船 每 小时 行 35 千米 ， 乙 船 速度 是 甲 船 的 (3/5) ， 求 几小时 后 两 船 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19423", "content": "一 个 长方体 的 宽 是 长 的 (2/3) ， 长 是 高 的 (5/6) ， 它 的 宽 是 20 厘米 ， 它 的 高 = 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12973", "content": "有 一块 地 共 24 公顷 ， 其中 (2/5) 种 黄花菜 ， 其余 的 按 5 ： 4 种 上 白菜 和 萝卜 ． 白菜 地 有 多少 公顷 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17604", "content": "学校 从 书店 取回 9 捆 图书 ， 每 捆 40 本 ， 把 这些 书 平均 分给 5 个 班 ， 每个 班 可以 分 图书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12210", "content": "一 辆 汽车 从 甲地 到 乙地 ， 平均 每 小时 行驶 80 千米 ， 行 了 (3/4) 小时 ， 刚好 行 了 全程 的 (2/5) ， 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14608", "content": "什么 数 除以 6 ， 商 是 34 ， 余数 是 5 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4158", "content": "一 辆 汽车 4 小时 行 200 千米 ， 平均 每行 1 千米 要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14493", "content": "师徒 共同 工作 8 小时 ， 加工 好 768 个 零件 ， 师傅 每 小时 加工 52 个 零件 ， 徒弟 每 小时 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9629", "content": "一 辆 小 货车 的 载重量 是 2.4 吨 ， 解放牌 汽车 的 载重量 是 小 货车 的 3.2 倍 ， 两种 车 每次 一共 运货 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22113", "content": "修补 一批 图书 ， 已经 修补 了 30 本 ， 是 未 修补 本 数 的 25% ． 这 批 图书 一共 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2488", "content": "一 个 高 为 4.4 cm 的 直角 梯形 ， 把 它 的 下 底 减少 1.2 cm 就 变成 了 一个 正方形 ， 这个 梯形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3297", "content": "工厂 食堂 运 来 8 袋 面粉 ， 每 袋 25 千克 ， 一共 吃 了 4 天 ， 平均 每天 吃 多少 千克 面粉 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2335", "content": "一 根 竹竿 插入 水池 底部 ， 露出 水面 部分 长 5 米 ． 把 竹竿 倒 过来 插入 水池 底部 ， 露出 水面 部分 有 2 米 是 干 的 ． 求 这根 竹竿 的 长度 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4161", "content": "用 一张 长 31.4 厘米 ， 宽 20 厘米 的 长方形 的 纸 围成 一个 圆柱体 ， 这 张 纸 的 长 就是 圆柱体 的 多少 ， 宽 是 圆柱体 的 多少 ． 圆柱体 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9853", "content": "放假 了 ， 小 刚 要 到 外公 家 去 ． 他 从 家 出发 必须 先 坐 汽车 到达 山前 这个 地方 ， 每天 上午 有 4 班 汽车 可 到 山前 ． 到 了 山前 需要 过 一座 大山 ， 过 山 的 路 有 3 条 ， 一条 是 步行 爬山 越过 山顶 ； 一条 是 通过 山洞 走 ； 还有 一条 是 坐 环山 小河 上 的 小艇 ． 这 3 条 路 都 可以 到达 山后 的 外公 家 ． 小朋友 ， 小 刚 从 家 出发 到 外公 家 去 有 几种 走法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7509", "content": "某班 准备 购买 一些 体育用品 ， 篮球 每个 35 元 ， 足球 每个 45 元 ． 买 4 个 篮球 和 1 个 足球 ， 预支 货款 后 补 回 了 15 元 ， 原来 预支 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "12843", "content": "0.4 / 1.84 的 商 ， 加上 两个 0.5 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14635", "content": "希望 小学 气象 小组 有 24 人 ， 摄影 小组 的 人数 是 气象 小组 的 (2/3) ， 航模 小组 的 人数 是 摄影 小组 的 (5/8) ． 航模 小组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "824", "content": "玲玲 看 《 故事 大王 》 ， 每天 看 6 页 ， 看 了 3 天 ， 第 4 天 该 从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1765", "content": "一 辆 自行车 原价 500 元 ， 现在 打 0.8 销售 ， 小 明 现在 买 这辆 自行车 要 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17057", "content": "工程队 修 一条 长 3500 米 的 公路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 全长 的 (1/3) ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3020", "content": "三年级 学生 到 茶园 里 劳动 ， 女生 有 56 人 ， 男生 有 64 人 ． 4 名 学生 分成 一组 ， 共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1023", "content": "妈妈 在 超市 买 了 3 千克 牛肉 ， 付出 300 元 ， 找回 60 元 ， 每千克 牛肉 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1109", "content": "一 种 酸奶 原价 每瓶 4.8 元 ， 现在 超市 进行 促销 活动 ， 每瓶 售价 4 元 ． 原来 买 5 瓶 酸奶 的 钱 现在 能 多 买 几瓶 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6413", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 全程 的 (4/7) ， 正好 是 160 千米 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19501", "content": "弟弟 看 一本 故事书 ， 已经 看 了 72 页 ， 比 没 看 的 多 63 页 ， 看 的 页数 是 没 看 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22420", "content": "希望 小学 的 同学 去 春游 ， 校车 上山 时 速度 为 每 小时 36 千米 ， 行 了 5 小时 ， 下山 比 上山 少 用 了 1 小时 ． 下山 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16587", "content": "明明 到 文具店 买 文具 ， 如果 买 6 元 一支 的 钢笔 可以 买 4 支 ． 如果 用 这些 钱 买 8 元 一台 的 钉书机 ， 可以 买 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16928", "content": "师徒 两 人 合作 加工 一批 零件 ， 结果 徒弟 完成 了 30 个 ， 占 零件 总数 的 (3/5) ， 师傅 完成 了 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1918", "content": "网络 公司 为 某 花园 小区 安装 宽带 网络线 ， 已经 安装 了 250 户 ， 还有 (6/11) 没有 安装 ， 这个 花园 小区 一共 有 多少 户 居民 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16797", "content": "一 个人 在 月球 上 的 体重 只有 在 地球 上 的 (1/6) ． 如果 杨利伟 在 月球 上 的 体重 是 12 千克 ， 他 在 地球 上 有 多重 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13679", "content": "一 个数 的 (1/6) 正好 是 24 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19020", "content": "育才 学校 有 学生 1250 人 ， 其中 女生 占 48% ， 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13228", "content": "在 一次 救灾 捐款 中 ， 第一 小组 12 人 ， 共 捐 得 人民币 960 元 ， 第 二 小组 8 人 ， 共 捐 得 人民币 1240 元 ． 两个 小组 平均 每人 捐 人民币 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9815", "content": "张师傅 原 计划 18 天 做 2520 个 零件 ， 实际 每天 比 计划 多 做 70 个 零件 ， 实际 多少 天 做 完 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22467", "content": "（ 123456 + 234561 + 345612 + 456123 + 561234 + 612345 ） / 7 = ．", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9206", "content": "少先队员 采集 标本 152 件 ， 其中 (5/8) 是 植物 标本 ， 其余 的 是 昆虫 标本 ， 昆虫 标本 有 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14354", "content": "食堂 买来 一批 白菜 一共 360 千克 ， 第一天 吃 了 这些 白菜 的 (1/3) ， 第 二 天 吃 了 这些 白菜 的 (1/4) ， 还 剩 多少 白菜 没有 吃 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15532", "content": "高峰 小学 有 16 个 班 ， 每个 班 有 45 个 学生 ． 这个 学校 共有 多少 个 学生 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8657", "content": "某 工厂 生产 一批 零件 ， 上 半月 完成 计划 的 (3/8) ， 下半月 完成 计划 的 (2/5) ， 这 批 零件 还 剩 几分 之 几 没有 完成 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14238", "content": "(2/3) 米 比 (5/6) 米 的 (7/8) 短 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4019", "content": "食堂 运 来 一批 大米 ， 已经 吃 去 600 千克 ， 正 好吃 去 (3/4) ， 这 批 大米 共 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8908", "content": "植树 工人 今年 种 杨树 201 棵 ， 种 的 松树 是 杨树 的 3 倍 ， 种 了 多少 棵 松树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5429", "content": "化肥厂 计划 生产 7200 吨 化肥 ， 已经 生产 了 4 个 月 ， 平均 每月 生产 化肥 1200 吨 ， 余下 的 每月 生产 800 吨 ， 还要 生产 多少 个 月 才能 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14739", "content": "一 件 工作 ， 原 计划 8 天 完成 ， 实际 5 天 完成 ． 工作 时间 缩短 了 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4047", "content": "机床厂 今年 生产 450 台 机床 ， 已知 上半年 生产 了 (3/5) ， 下半年 生产 多少 台 机床 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20167", "content": "王老师 领取 一笔 3000 元 稿费 ， 按规定 超过 800 元 的 部分 要 按 20% 缴纳 个人所得税 ， 王老师 缴纳 个人所得税 后 应 领取 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "76", "content": "一 本 247 页 的 童话 书 ， 小 明 13 天 就 读完 ， 照 这样 的 阅读 速度 ， 一本 171 页 的 书 ， 小 明 要 多少 天 读完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18396", "content": "明明 上学 ， 从 家里 出发 ， 先 走 了 200 米 ， 发现 再 过 5 分钟 就 上课 了 ， 于是 以 每分钟 100 米 的 速度 跑步 赶往 学校 ， 刚好 准时 到校 ， 明明 家 离 学校 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12488", "content": "一 块 三角形 菜地 ， 它 的 3 条 边 分别 长 15 米 、 12 米 和 7 米 ， 这个 三角形 菜地 的 周长 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12302", "content": "一 幢 高 68.8 米 的 楼房 ， 一楼 的 层高 是 4.8 米 ， 其余 每层 的 层高 都 是 3.2 米 ， 这幢 楼 一共 有 多少 层 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11861", "content": "同学 们 收集 图片 ， 收集 的 名山 图片 占 60% ， 河流 图片 占 30% ． 名山 图片 比 河流 图片 多 30 张 ， 一共 收集 了 多少 张 图片 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16222", "content": "学校 买 回 一些 练习本 ， 发给 20 个 班 ， 每个 班 608 本 ， 还 剩 340 本 ， 学校 买 回 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16401", "content": "商店 运 来 一批 电视机 ， 卖出 18 台 ， 剩下 (1/3) ， 共运 来 多少 台 电视机 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9758", "content": "一 项 工程 原 计划 由 36 人 做 ， 要 17 天 完成 ， 工作 3 天 后 ， 决定 要 提前 2 天 完成 ， 需要 增加 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "8346", "content": "每个 一次性 纸杯 可以 装 0.25 升 果汁 ， 现有 一桶 5 升 的 果汁 ， 需要 多少 个 纸杯 才能 装完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21981", "content": "小 华 爸爸 在 银行 里 存入 8000 元 ， 存 定期 3 年 ， 年利率 是 3.69% ， 到期 时 可以 得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10603", "content": "商场 里 一件 衣服 卖 240 元 ， 比 原价 便宜 了 20% ， 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10856", "content": "一 只 熊猫 体重 65 千克 ， 一只 小 象 的 体重 比 熊猫 的 10 倍 多 12 千克 ． 小 象 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4962", "content": "两个 修路 队 合 修 一条 3.9 千米 的 路 ， 20 天 完成 ， 甲 修路 队 每天 修 0.1 千米 ， 乙 修路 队 每天 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12361", "content": "春节 快 到 了 ， 为 满足 大家 回家 过年 的 愿望 ， 某 火车站 决定 每天 加开 8 列 火车 ， 每 列 火车 14 节车厢 ， 每 节车厢 116 个 座位 ， 每天 可 多 运送 旅客 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "557", "content": "小 明 看 一本 180 页 的 故事书 ， 已经 看 了 4 天 ， 每天 看 35 页 ． 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2177", "content": "一 辆 汽车 0.3 小时 行使 15 千米 ， 用 同样 的 速度 ， 从 甲 站 开往 乙 站 需要 5.85 小时 ． 甲 、 乙 两站 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14660", "content": "在 神舟 7 号 飞船 的 697 台 合 装船 设备 中 ， 沿用 设备 346 台 ， 更改 设备 237 台 ， 其余 是 新 研制 设备 ． 新 研制 设备 有 多少 台 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13681", "content": "果园 里 有 梨树 300 棵 ， 比 苹果树 少 (1/4) ， 苹果树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8327", "content": "2.09 与 一个 数 相乘 得 26.752 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18464", "content": "青少年 活动中心 买来 5 个 篮球 和 12 个 气 排球 ， 共用 去 710 元 ， 每个 篮球 88 元 ， 每个 气 排球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16430", "content": "小 刚 有 一本 科技 书 共 60 页 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 60% ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3741", "content": "李老师 把 1000 元 存入 银行 ， 定期 5 年 ， 年利率 3.20% ． 到期 后 李老师 能 从 银行 取 到 本金 和 税后 利息 共 多少 元 ？ （ 按 5% 缴纳 利息税 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "8949", "content": "买 一个 布娃娃 要 21.7 元 ， 买 一个 玩具 熊 要 8.5 元 ． 布娃娃 比 玩具 熊 贵 多少 元 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14242", "content": "粮店 运回 9090 千克 大米 ， 卖出 90 袋 之后 ， 还 剩 大米 6390 千克 ， 问 每 袋 大米 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "752", "content": "3 个 (1/6) 与 多少 个 (1/12) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "551", "content": "湖里 有 23 只 鸭子 ， 岸上 的 鸭子 的 只 数 比 湖里 鸭子 的 2 倍 还 多 6 只 ， 一共 有 多少 只 鸭子 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3897", "content": "一 根 绳子 长 25 米 ， 第一次 剪 去 9 米 ， 第 二 次 剪 去 12 米 ， 这根 绳子 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20024", "content": "李 叔叔 从 县城 出发 去 上 庄 送 化肥 ， 去 的 时候 用 了 3 小时 ， 返回 时 用 了 2 小时 ． 已知 去 时 的 速度 为 50 千米 / 时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15468", "content": "工人 师傅 加工 某种 零件 ， 原来 平均 每 小时 能 加工 35 个 ． 技术革新 后 ， 现在 加工 这种 零件 ， 工效 比 原来 的 3 倍 少 10 个 ． 现在 平均 每 小时 加工 零件 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "835", "content": "四年级 有 学生 150 人 ， 四年级 比 五年级 多 (1/4) ， 五年级 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14023", "content": "秋天 换季 时 妈妈 给 我 买 了 一双 特价 的 凉鞋 ， 花 去 了 130 元 ， 比 标价 便宜 了 (7/20) ， 这 双 凉鞋 的 标价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13179", "content": "公交车 上 原有 乘客 18 人 ， 到 区 府 站 下车 5 人 ， 上车 7 人 ， 车上 现有 乘客 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15119", "content": "一 桶 油 重 20 千克 ， 倒 出 (3/5) 后 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14479", "content": "2 米 长 的 铁丝 ， 先剪 去 它 的 (1/2) ， 再剪 去 它 的 (1/6) ， 一共 剪 去 这根 铁丝 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16736", "content": "油菜籽 的 出油率 是 38% ， 要 榨菜 油 950 千克 ， 需要 多少 千克 油菜籽 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1735", "content": "1 千米 的 路程 15 分钟 走 完 ， 平均 每分钟 走 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19863", "content": "食堂 运 来 一些 大米 和 面粉 ， 已知 面粉 有 75 千克 ， 比 运 来 的 大米 多 (1/2) ， 食堂 运 来 大米 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9002", "content": "利民 水果店 运 来 500 千克 桃 ， 卖出 了 15 筐 ， 平均 每 筐 20 千克 ， 还 剩 多少 千克 桃 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "734", "content": "一 批 零件 有 8 个 不 合格 ， 至少 要 有 多少 个 合格 ， 才能 保证 合格率 98%", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15824", "content": "织金县 某 小学 组织 学生 参加 运动会 ， 四年级 有 12 人 参加 ， 比 五年级 少 7 人 ， 六年级 参加 的 人数 是 4 、 五年级 参加 的 总 人数 的 3 倍 ． 六年级 有 多少 人 参加 运动会 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7967", "content": "52.4 - 22.7 与 7.2 的 和 ， 所得 的 差 除以 4.5 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1115", "content": "诸暨市 向 云南省 干旱 灾区 运送 一批 救灾物资 ， 第一天 行 了 全程 的 30% ， 第 二 天 行 了 全程 的 (2/5) ， 这时 距离 灾区 还有 660 千米 ． 诸暨市 到 灾区 之间 的 距离 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12614", "content": "一 辆 汽车 从 成都 开往 昆明 ， 去 时 速度 为 80 千米 / 小时 ， 用 了 12 小时 ； 返回 时 速度 为 96 千米 / 小时 ， 返回 成都 用 了 多少 时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20419", "content": "一 个 班 的 学生 无论 6 人 一组 还是 5 人 一组 都 多 4 人 ， 这个 班 至少 有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13034", "content": "食堂 运 来 960 千克 煤 ， 计划 烧 20 天 ， 实际 每天 比 计划 节约 8 千克 ， 实际 烧 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16855", "content": "两地 相距 96 千米 ， 甲乙 两车 同时 从 两地 相对 开出 ， (4/5) 小时 相遇 ． 甲 车 每 小时 行 54 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18599", "content": "刘 叔叔 想 用 一块 菜地 的 (1/8) 种 白菜 ， 用 菜地 的 (2/8) 种 胡萝卜 ， 剩下 的 种 南瓜 ． 用来 种 南瓜 的 地 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7190", "content": "某 煤矿 今年 每月 生产 原煤 120 万吨 ， 比 去年 每月 产量 的 2 倍 少 80 万吨 ， 去年 每月 生产 原煤 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3670", "content": "运 一批 货物 ， 每天 运 (1/6) ， 多少 天 能 运 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1202", "content": "把 一个 铁球 浸没 在 长 30 cm ， 宽 和 高 都 是 20 cm 的 长方体 容器 的 水中 ， 容器 的 水深 由 8 cm 上升 到 10 cm ． 这个 铁球 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9885", "content": "快 、 慢 两列 火车 相向 而 行 ， 快 车长 50 米 ， 慢 车长 80 米 ， 快车 的 速度 是 慢车 的 2 倍 ． 如果 坐在 慢 车上 的 人 见 快车 驶过 窗口 的 时间 是 5 秒 ， 那么 ， 坐在 快车 上 的 人 见 慢车 驶过 窗口 的 时间 = 多少 秒 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9024", "content": "国庆节 期间 商场 搞 促销 ， 所有 商品 一律 0.8 出售 ， 王老师 花 260 元 买 了 一套 运动服 ， 这 套 衣服 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9789", "content": "李 明 星期天 进城 买 学习用品 ， 所 带 的 钱 如果 全部 买 练习本 ， 可以 买 10 本 ； 如果 全部 买 铅笔 ， 可以 买 15 枝 ． 李 明 先买 了 4 本 练习本 ， 剩下 的 钱 还 可以 买 多少 枝 铅笔 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22298", "content": "一 本书 ， 看 了 的 页数 与 剩下 的 页数 的 比 是 7 ： 8 ， 看 了 的 页数 占 总 页数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7611", "content": "学校 投保 了 “ 师生 平安保险 ” ， 保险金额 每人 5000 元 ， 按 每年 保险费率 0.4% 计算 ， 每年 每人 应付 保险费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12715", "content": "小 红 读 一 本书 ， 第一天 读 了 全书 的 (1/6) ， 第 二 天 读 了 余下 的 (1/3) ， 两天 共 读 32 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22879", "content": "把 一批 化肥 分给 甲 、 乙 、 丙 3 个 村子 ， 甲 村 分 得 总数 的 (1/4) ， 其余 按 2 ： 3 的 比例 分给 乙 、 丙 两 村 ， 已知 丙村 分 得 18 吨 ． 这 批 化肥 有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13972", "content": "某市 今年 上半年 工业 总产值 770 亿元 ， 比 去年同期 增长 10% ， 去年 上半年 工业 总产值 多少 亿元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9794", "content": "一 包 食盐 2 kg ， 用 去 它 的 (1/4) ， 用 去 了 几 kg ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20717", "content": "张师傅 要 加工 一批 零件 ， 每 小时 加工 20 个 ， 6 小时 可以 完成 ． 如果 每 小时 加工 24 个 ， 多少 小时 可以 完成 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10207", "content": "操场上 有 26 人 在 跳高 ， 跑步 的 人数 比 跳高 的 3 倍 多 10 人 ， 跑步 的 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5757", "content": "鸡 的 只 数 比 鸭 少 20% ， 鸭 的 只 数 比 鸡 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8621", "content": "口袋 里 有 大小 、 形状 完全相同 的 5 块 手表 ， 2 块 手表 的 表带 是 银白色 的 ， 3 块 手表 的 表带 是 黄色 的 ． 从中 任意 摸 一块 ， 摸 到 黄色 表带 手表 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21816", "content": "一 个数 除以 7 ， 商 是 101 ， 余数 是 4 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10485", "content": "一 列 火车 以 每分钟 800 米 的 速度 ， 通过 一座 长 3200 米 的 大桥 ， 如果 火车 全长 240 米 ， 从 车 头上 桥 到 最后 一 节车厢 离开 大桥 另一端 ， 一共 需 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13134", "content": "一 堆 煤 15 吨 ， 第一 月 烧 了 这 堆 煤 的 (1/3) ， 剩下 的 比 烧 了 的 多 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9551", "content": "当 你 开车 到 了 (2/3) 路程 时 ， 你 的 油箱 已 由 原来 的 满 箱 到 只有 (1/4) 箱 油 ． 问 只用 这些 剩下 的 油 你 能 将 车 开 到 距 终点 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21276", "content": "某 公园 去年 上半年 有 280 万名 游客 ， 比 下半年 多 (1/6) ． 该 公园 去年 有 多少 万名 游客 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17799", "content": "水果 批发店 运 来 560 箱 苹果 ， 上午 卖出 235 箱 ， 下午 卖出 198 箱 ， 还 剩 多少 箱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12458", "content": "李 明 开车 从 甲地 到 乙地 ， 前 3 小时 行 了 330 千米 ， 照 这样 计算 ， 还 需 5 小时 就 可以 到达 乙地 ， 甲乙 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14687", "content": "一 根 绳子 长 5 米 ， 这根 绳子 的 (2/3) = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11046", "content": "一 列 火车 身长 90 米 ， 火车 以 每分钟 160 米 的 速度 通过 山洞 ， 用 了 3 分钟 ， 山洞 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8310", "content": "粮店 原来 有 (13/20) 吨 大米 ， 卖出 (1/2) 吨 后 ， 又 运进 (7/10) 吨 ． 粮店 现在 有 大米 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3529", "content": "把 (2/3) 千克 的 糖果 平均 分成 4 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10824", "content": "创 卫生城 期间 ， 四年级 一班 51 人 ， 平均 每人 捡拾 塑料袋 6 个 ， 四年级 2 班 有 47 人 ， 平均 每人 捡拾 塑料袋 5 个 ． 两个 班 一共 捡拾 塑料袋 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6937", "content": "27 / 678 与 267 的 和 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5600", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 全程 的 (3/5) ， 距离 乙地 还有 80 千米 ， 已经 行 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4372", "content": "两箱 苹果 ， 从 甲 箱 中 取出 (1/4) ， 从 乙 箱 中 取出 (1/5) ， 这时 两箱 苹果 剩下 的 苹果 重量 相等 ， 已知 甲 箱 原有 苹果 40 千克 ， 乙 箱 原有 苹果 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16734", "content": "甲 、 乙 两 人 同时 从 a 地 到 b 地 ， 甲 骑 摩托车 时速 55 千米 ， 乙 骑 自行车 时速 是 20 千米 ． 6 小时 后 ， 甲 到达 b 地 ． 这时 ， 乙 离 b 地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13651", "content": "一 种 彩电 现价 每 台 2100 元 ， 比 原来 降低 了 400 元 ． 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21903", "content": "一 种 压路机 滚筒 是 一个 圆柱体 ， 它 的 底面 直径 是 1 米 ， 长 是 1.5 米 ． 如果 它 转 5 圈 ， 一共 压路 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2815", "content": "一 套 服装 的 成本价 是 50 元 ， 如果 厂家 赚 20% ， 零售商 赚 10% ， 则 这 套 服装 的 售价 应为 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "19574", "content": "天天 电器行 出售 的 彩电 目前 价格 为 每 台 1260 元 ， 比 原来 售价 降低 了 (1/9) ． 原来 每 台 彩电 的 售价 为 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9258", "content": "王 叔叔 骑 自行车 的 速度 是 每 小时 18 千米 ， 他 从 甲地 到 乙地 需要 6 小时 ． 如果 改乘 汽车 要 2 小时 ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15575", "content": "银 湖 社区 有 362 户 住户 ， 江南 社区 的 住户 数 是 银 湖 社区 的 8 倍 ， 江南 社区 比 银 湖 社区 多 多少 户 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "615", "content": "火车 每 小时 行 140 千米 ， 飞机 的 速度 是 火车 的 6 倍 ． 飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1801", "content": "现行 我国 居民 人民币 定期 储蓄 一年期 的 年利率 是 1.98% ， 利息税 是 20% ． 李 华 在 银行 存 了 1000 元 压岁钱 ， 一年 后 他 可 得 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "7342", "content": "两个 因数 的 积 是 0.45 ， 其中 的 一个 因数 是 1.2 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11859", "content": "大小 鱼缸 里 放 着 同样 多 的 金鱼 ， 如果 从小 鱼缸 里 拿出 4 条 放到 大鱼缸 里 ， 大鱼缸 金鱼 条数 就是 小 鱼缸 的 2 倍 ， 小 鱼缸 里 原来 有 多少 条 金鱼 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10056", "content": "一 个 电器厂 有 500 名 职工 ， 其中 女职工 占 43% ． 男 职工 共有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2026", "content": "“ 十一 ” 黄金周 期间 ， 花果山 景区 共 接待 中外 游客 25.6 万人次 ， 门票 收入 达 850 万元 ． 按 门票 收入 的 3% 缴纳 营业税 ， 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8620", "content": "龙南 镇 中心小学 要 为 四年级 的 学生 每人 买 一本 价格 14 元 的 《 安全 知识 竞赛 》 书 ． 四年级 有 学生 156 人 ， 学校 要 准备 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21019", "content": "一 辆 汽车 每 小时 行驶 40 千米 ． 这辆 车 从 甲地 到 乙地 行驶 了 8 小时 ， 接着 又 从 乙地 开往 丙 地 ， 用 了 5 小时 ． 从 甲地 到 丙 地 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12571", "content": "3 （ 1 ） 班 为 幼儿园 的 小朋友 做 花 ， 共 做 了 54 朵 ， 女生 做 的 花 的 数量 是 男生 的 2 倍 ． 女生 做 了 几朵 花 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2399", "content": "一 个 食堂 十一 月份 烧煤 45 吨 ， 比 原 计划 节约 了 5 吨 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12339", "content": "小 华 的 爸爸 从 南京 乘飞机 到 北京 ， 飞机票 原价 是 1050 元 ． 航空公司 规定 ， 每位 乘坐 飞机 的 旅客 ， 携带 行李 超过 20 千克 的 部分 ， 每千克 要 按 飞机票 原价 的 1.5% 购买 行李 票 ． 小 华 的 爸爸 带 了 30 千克 行李 ， 应付 行李 费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4554", "content": "男生 人数 是 女生 的 80% ， 女生 人数 占 全班 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12299", "content": "工地 运 来 一堆 石子 ， 砌墙 用 去 (3/5) 吨 ， 铺 地 用 去 (1/4) 吨 ， 还 剩 (1/10) 吨 ， 这 堆 石子 原来 有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9771", "content": "一 种 彩电 原价 每 台 2500 元 ， 现在 价格 降低 了 400 元 ． 降价 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "609", "content": "甲 、 乙 两地 相距 500 千米 ， 客车 和 货车 同时 由 甲地 开往 乙地 ， 当 客车 到达 乙地 时 ， 货车 只 行 了 400 千米 ， 继续 行驶 2 小时 才能 到 乙地 ． 客车 行 完全 程 需要 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21698", "content": "修 一段 420 米 的 公路 ， 每天 修 80 米 ， 修 了 4 天 后 剩下 的 每天 多 修 20 米 ， 剩下 的 几天 修 完 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11358", "content": "植树节 那天 ， 3 （ 5 ） 班 分 6 个 小组 ， 每个 小组 8 人 去 树 ， 植树 432 棵 ， 平均 每人 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11199", "content": "小 明 买 12 个 复读机 ， 每个 复读机 298 元 ， 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21815", "content": "蜻蜒 目前 有 4500 种 ， 占 昆虫 种类 的 0.45% ， 昆虫 有 多少 种 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8433", "content": "甲 、 乙 两 人 身上 的 钱 数 的 比量 4 ： 3 ， 甲 给 乙 10 元 后 ， 这时 乙 人 的 钱 占 两 人 总 钱 的 (1/2) ， 现在 乙 人 有 多少 钱 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4058", "content": "一 个 养鸭 场 ， 今年 养鸭 300 只 ， 比 去年 多 养 上 (1/5) ． 去年 养鸭 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16723", "content": "两个 因数 分别 是 6 和 8 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3006", "content": "仓库 里 有 一批 化肥 ， 第一次 取出 总数 的 (2/5) ， 第 二 次 取出 的 比 总数 的 (1/3) 少 12 袋 ， 这时 仓库 里 还 剩下 24 袋 ． 两次 共 取出 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14224", "content": "六年级 有 男生 22 人 ， 女生 比 男生 少 (2/11) ， 全班 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22969", "content": "妈妈 购回 一箱 早餐 奶 ， 共有 24 袋 ， 付 了 50 元 后 ， 找回 5.6 元 ． 每 袋 早餐 奶 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "376", "content": "飞机 每 小时 能 飞 1000 千米 ， 而 人造卫星 每 小时 飞行 的 路程 比 飞机 23 倍 还 多 1080 千米 ， 人造卫星 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "31", "content": "一 只 蝴蝶 0.8 小时 飞行 5.6 千米 ， 一只 蜜蜂 的 飞行速度 是 这 只 蝴蝶 的 2.5 倍 ， 这 只 蜜蜂 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5121", "content": "一 个 长方形 长 减少 (2/5) ， 宽 增加 (4/5) 米 ， 则 面积 不变 ， 原来 长方形 的 宽 = 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17097", "content": "一 根 钢管 ， 用 去 25% ， 正好 还 剩 (6/7) 米 ， 这根 钢管 一共 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13578", "content": "有 含盐 45% 的 盐水 300 克 ， 配制 成 含盐 15% 的 盐水 ， 需 加水 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10046", "content": "一 个 装满 稻谷 的 圆柱形 粮 屯 ， 底面 面积 为 20 平方米 ， 高 为 0.8 米 ， 每 立方米 稻谷 约 重 600 千克 ， 这个 粮 屯 存放 的 稻谷 约 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17524", "content": "果园 里 有 595 棵 苹果树 ， 是 桃树 的 7 倍 ． 苹果树 比 桃树 多 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12927", "content": "一 件 皮衣 价格 为 1650 元 ， 打 0.8 售出 仍 可 获利 10% ， 这件 皮衣 进价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17570", "content": "一 个 长方形 宽 3 米 ， 长 是 宽 的 2 倍 ， 这个 长方形 的 周长 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22750", "content": "小 芳 从 1 楼 走 到 3 楼 ， 用 了 48 秒 ． 那么 ， 她 从 2 楼 走 到 5 楼 用 了 多少 秒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11194", "content": "果园 里 有 苹果树 120 棵 ， 比 梨树 的 棵 树 多 20% ． 苹果树 和 梨树 共有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12590", "content": "96 - 35 的 差 ， 乘 63 与 25 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3630", "content": "8 kg 大米 用 去 (1/5) kg ， 剩下 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2188", "content": "盒 中 有 4 个 黄 球 、 3 个 红球 （ 黄 球 与 红球 的 大小 、 形状 一样 ） ， 从中 任意 摸 一个 球 ， 摸 出 黄 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3983", "content": "一 辆 汽车 (5/6) 小时 行 85 千米 ， 1 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14938", "content": "12 天 生产 216 辆 小汽车 ． 计划 生产 234 辆 小汽车 ， 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5654", "content": "计算 99999 * 7 + 11111 * 37 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "936", "content": "小 华 读 一本 92 页 的 故事书 ， 已经 读 了 4 天 ， 还 剩下 16 页 ， 小 华 平均 每天 读 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17336", "content": "新华书店 运进 文艺 书 2800 册 ， 运进 的 科技 书 比 文艺 书 的 2 倍 少 1200 册 ． 运进 科技 书 多少 册 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1934", "content": "小 明 的 爸爸 把 一根 铁丝 剪成 4 段 要 用 12 分钟 ， 如果 要 剪成 7 段 ， 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5191", "content": "名 智 学校 原有 学生 720 人 ， 本学期 初 转 进 的 学生 人数 相当于 原来 男生 人数 的 (1/20) ， 这时 全校 比 原来 多 了 18 人 ， 这个 学校 原来 有 男生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22385", "content": "某校 参加 兴趣小组 活动 的 学生 共 83 人 ． 其中 音乐 小组 有 25 人 ， 微机 小组 的 人数 是 音乐 小组 的 1.2 倍 ， 其余 的 是 绘画 小组 ． 绘画 小组 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3691", "content": "一 个 停车场 ， 有 23 辆 大 汽车 ， 面包车 的 数量 是 大 汽车 的 3 倍 ， 小汽车 的 数量 比 大 汽车 和 面包车 的 总数 少 18 辆 ， 小汽车 有 多少 辆 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10210", "content": "(2/3) * 4 * (1/2) = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1321", "content": "水果店 运 来 120 千克 水果 ， 第一天 卖 了 (1/6) ， 第 二 天 卖 了 48 千克 ， 两天 共 卖 了 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17517", "content": "一 种 树苗 经 试验 成活率 是 90% ， 为了 保证 成活 450 棵 ， 至少 要 栽种 多少 棵 树苗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12847", "content": "125 个 8 的 和 除 1000 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10016", "content": "一 个 公司 60 人 ， 用 22 天 的 时间 完成 一项 工程 的 任务 ， 工作 15 天 以后 ， 又 增加 了 10 人 ， 还要 多少 天 才能 完成 任务 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9893", "content": "某人 将 20000 元 存入 银行 ， 年利率 是 2.67% ， 一年 期满 后 按 国家 规定 须 缴纳 利息税 20% ． 实 得 利息 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "895", "content": "一 个 修路 队 计划 50 天 修 一段 铁路 ， 平均 每天 修 48 米 ， 实际 每天 修 60 米 ， 实际 修 这 段 路 用 了 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22831", "content": "同学 们 栽树 ， 四年级 栽 了 32 棵 ， 六年级 栽 的 棵 数 比 四年级 的 3 倍 少 18 棵 ， 四年级 比 六年级 少 栽 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6608", "content": "28 * 5 + 2 * 4 * 35 + 21 * 20 + 14 * 40 + 8 * 50 = ．", "knowledge": ["*", "+"], "difficulty": 0.9, "length": 21}
-{"question_id": "18933", "content": "妈妈 每天 骑 自行车 上下班 ， 一周 （ 5 天 ） 共 骑车 12.5 小时 ， 平均 每天 骑车 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21711", "content": "用 一个 杯子 向 一个 空瓶 里 倒水 ． 如果 倒 进 3 杯水 ， 连 瓶 共 重 440 克 ； 如果 倒 进 5 杯水 ， 连 瓶 共 重 600 克 ， 一个 空瓶 重 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15043", "content": "梯形 的 下 底 6 分 米 ， 上 底 9 分 米 ， 高 2 分 米 ， 它 的 面积 多少 平方分米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5239", "content": "库房 有 一批 货物 ， 第一天 运走 (1/5) ， 第 二 天运 了 8 吨 ， 还 剩 这 批 货物 总重量 的 (1/3) 这 批 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20550", "content": "加工 一批 服装 ， 计划 每天 做 45 套 ， 20 天 完成 ． 实际 18 天 完成 ， 平均 每天 多 加工 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10406", "content": "修 一条 路 ， 第一天 修 了 全路 的 (1/3) ， 第 二 天 修 了 余下 的 (2/5) ， 两天 共 修路 135 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5271", "content": "16 千米 的 (5/8) 与 多少 的 (1/4) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15047", "content": "一 本书 ， 第一天 读 了 全书 的 20% ， 第 二 天 读 了 11 页 ， 还 剩 25% 没有 读 ， 则 这本 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14560", "content": "按 《 个人所得税法 》 规定 ， 个人 月工资 收入 超出 1600 元 的 部分 ， 应 按 5% 的 税率 缴纳 个人所得税 ； 李 叔叔 每月 工资 是 1840 元 ， 他 每月 应 向 国家 缴纳 多少 元 的 个人所得税 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16232", "content": "甲 、 乙 两车 从 相距 210 米 的 a 、 b 两地 同时 出发 ， 相向 而 行 ， 3 小时 相遇 ． 已知 甲 车 每 小时 行 30 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22538", "content": "一 台 饮水机 的 价格 是 204 元 ， 一台 电脑 的 价格 是 饮水机 的 13 倍 ． 王 叔叔 要 买 一台 饮水机 和 一台 电脑 ， 需要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13922", "content": "修 一条 公路 ， 已经 修 了 (1/3) ， 正好 修 了 400 米 ， 还有 多少 米 没有 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7805", "content": "一 本书 共 250 页 ， 第一天 读 了 全书 的 (2/5) ， 第 二 天 读 了 全书 的 (1/5) ， 还 剩 多少 页 没 读 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11933", "content": "3.75 是 5 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15996", "content": "爸爸 想 买 一台 价格 为 6500 元 的 电脑 ， 他 现在 存款 5700 元 ． 如果 以后 每月 存 80 元 ， 需要 几个 月 才 能够 买 这 台 电脑 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17703", "content": "某 工厂 职工 原来 平均 月工资 是 1200 元 ， 现在 平均 月工资 增加 到 1500 元 ， 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3569", "content": "你 听说 过 “ 冰山一角 ” ？ 冰山一角 露 在 水面 上 的 只是 一小部分 ， 大部分 隐藏 在 水面 下 ， 如果 一座 冰山 露 在 水面 上 体积 约 是 80 立方米 ， 这 “ 一角 ” 只 占 这 座 冰山 的 (1/7) ， 那么 这 座 冰山 的 体积 = 多少 立方米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4920", "content": "一 根 钢材 长 (4/5) 米 ， 若 用 去 一些 后 还 剩 (1/2) 米 ， 用 去 了 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11701", "content": "银河 超市 运 来 10 包 毛巾 ， 每包 240 条 ． 卖出 1420 条 ， 还 剩 多少 条 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16419", "content": "一 个 等腰三角 形 的 周长 是 33 厘米 ， 一条 腰 与 底边 长度 的 比 是 4 ： 3 ． 这个 三角形 的 一条 腰 长 = 多少 厘米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15059", "content": "小 芳 家 到 学校 的 路程 是 2400 米 ， 一天 早上 ， 她 骑车去 学校 ， 以 每 分 250 米 的 速度 骑 了 6 分钟 ， 这时 发现 必须 用 3 分钟 赶到 学校 ， 否则 会 迟到 ， 剩下 的 路程 平均 每分钟 要 行 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16694", "content": "一 段 路 ， 从头到尾 有 23 盏 路灯 ， 每 两盏 路灯 相距 24 米 ， 这 段 路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11245", "content": "一 根 电线 长 16.4 米 ， 第一次 用 去 (1/4) ， 第 二 次 用 去 (1/2) 米 ， 这根 电线 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18511", "content": "红红 家 要 栽种 一批 树苗 ， 这种 树苗 的 成活率 一般 为 75% - 80% ， 假如 要 栽 活 1000 棵 树苗 ， 那么 至少 应 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20489", "content": "明明 比 亮 亮 多 32 张 邮票 ， 明明 和 亮 亮 邮票 的 比 是 5 ： 3 ， 明明 有 邮票 多少 张 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1283", "content": "有 1 吨 钢铁 ， 上午 运走 了 (3/8) 吨 ， 下午 又 运来了 (2/8) 吨 ， 现在 有 几分 之 几吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20891", "content": "一 袋 薯片 包装 上 标明 净重 250 （ ± 5 ） 克 ， 那么 这 袋 薯片 实际上 质量 最 多 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12755", "content": "一 游泳池 长 50 米 、 宽 5 米 、 深 2 米 ， 沿 游泳池 的 内壁 1.5 米 高处 用 漆画 一条 水位 线 ， 水位 线 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11504", "content": "水果糖 每盒 重 (1/8) 千克 ， 每千克 18 元 ， 酥糖 每盒 重 (1/10) 千克 ， 每千克 25 元 ， 买 一盒 水果糖 和 一盒 酥糖 要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1976", "content": "某 工厂 现在 每 件产品 的 成本 是 39 元 ， 比 原来 降低 了 25% ． 原来 每 件产品 的 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19907", "content": "运动场 的 看台 分 8 个 区 ， 每个 区 有 648 个 座位 ． 运动场 做 多 可以 坐 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2169", "content": "一 项 工程 ， 甲 、 乙 合作 8 天 完成 ， 如果 让 甲 先 独 做 6 天 ， 然后 乙 再 独 做 9 天 完成 任务 ． 求 乙 独 做 这项 工程 要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10124", "content": "从 北京 到 沈阳 的 铁路 长 738 千米 ， 两列 火车 从 两站 同时 相向 开出 ， 3 小时 后 相遇 ． 已知 甲 车 每 小时 行 118 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21142", "content": "一 种 电视机 现价 为 1900 元 ， 比 过去 降低 了 600 元 ， 这种 电视机 的 售价 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9420", "content": "一 列 火车 长 180 米 ， 以 每秒 15 米 的 速度 通过 一座 大桥 用 了 60 秒 ． 大桥 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10143", "content": "东门 小学 8 月份 节约用电 129 度 ， 9 月份 节约用电 263 度 ， 每 度 电 按 0.617 元 计算 ． 这 两个 月 共 节约 电费 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8293", "content": "几个 小朋友 分 苹果 ， 如果 每人 分 2 个 ， 就 余 16 个 ， 如果 每人 分 5 个 ， 少 14 个 ． 小朋友 有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9695", "content": "某 城市 出租车 这样 计费 ： 3 千米 以内 8 元 钱 ， 以后 每 千米 2 元 钱 ． 王 大伯 坐 了 5 千米 ， 应 给 多少 元 车费 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21573", "content": "在 用 折线 统计图 统计 东风 自行车厂 各 季度 产量 情况 时 ， 纵轴 上 0.8 厘米 的 线段 表示 1000 辆 ， 那么 3.2 厘米 表示 多少 辆 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "690", "content": "多少 / 28 = 16 … 7 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20906", "content": "一 个 加数 是 279 ， 另 一个 加数 是 146 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5001", "content": "某 电视机厂 原来 每天 生产 116 台 电视机 ， 现在 每天 生产 的 台数 是 原来 的 12 倍 ， 现在 每天 能 生产 多少 台 电视机 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2718", "content": "一 箱 可乐 48 元 ， 超市 里 今天 卖 15 箱 ， 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9028", "content": "有 5 个 不同 的 文具盒 ， 4 只 不同 的 铅笔 ， 3 只 不同 的 钢笔 ， 从中 各 取 一个 ， 配成 一套 学习 用具 ， 最 多 有 多少 套 不同 的 学习 用具 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6711", "content": "学校 合唱队 订做 了 80 套 演出服 ， 每件 上衣 54 元 ， 每 条 裤子 68 元 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13172", "content": "一 本 笔记本 4 元 钱 ， 王小明 共 带 了 112 元 ， 他 一共 能 买 多少 本 这样 的 笔记本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14018", "content": "1.5 与 (2/3) 的 和 除以 (5/6) ， 再 减去 2.3 ， 结果 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5260", "content": "两辆 汽车 从 a 、 b 两个 城市 同时 相对 开出 ， 甲 车 每 小时 行 35 千米 ， 乙 车 每 小时 行 55 千米 ， 开车 4 小时 后 ， 两车 走 完 的 路程 是 两城 之间 的 距离 的 (5/7) ， a 、 b 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9825", "content": "小 明 第一天 看 了 一 本书 的 (4/11) ， 第 二 天 看 的 相当于 第一天 的 (3/2) ， 小 明 两天 有没有 看 完 这 本书 ？ 为什么 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16861", "content": "把 72 个 同学 平均 分成 8 个 组 ， 每组 = 多少 个 同学 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2044", "content": "5 （ 1 ） 班 原有 42 人 ， 新学期 转入 3 个 男生 后 ， 男生 人数 占 全班 人数 的 (5/9) ． 女生 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12913", "content": "某 图书馆 买来 6 个 书架 ， 每个 书架 有 5 层 ， 每层 可以 放 35 本书 ， 这些 书架 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "497", "content": "往 盒子 里 放入 12 个 球 ， 要 使 摸 到 白 球 的 可能性 是 (1/3) ， 盒子 里 应该 放 多少 个 白 球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16164", "content": "一 块儿 边长 是 30 厘米 的 正方形 铁皮 制作 一个 圆柱 ， 它 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10415", "content": "一 辆 客车 和 一辆 货车 分别 从 a 、 b 两地 同时 出发 相对 而 行 ． 客车 每 小时 行 80 千米 ， 货车 每 小时 行 全程 的 (1/12) ． 当 货车 行至 全程 的 (2/3) 时 ， 客车 再行 全程 的 (1/9) 到达 b 地 ． 求 ab 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22087", "content": "甲 、 乙 两 人 沿 一个 圆形 的 操场 的 边 散步 ， 从 同一 地点 出发 ， 背向 而 行 ， 甲 每分钟 走 40 米 ． 乙 每分钟 走 38.5 米 ， 4 分钟 相遇 ， 这个 操场 的 直径 = 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4369", "content": "一 条 环形 跑道 长 400 米 ， 甲 骑 自行车 每分钟 450 米 ， 乙 跑步 每分钟 250 米 ， 两 人 同时 同 地 同 向 出发 ， 经过 多少 分钟 两 人 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22264", "content": "小 虎 家养 了 18 只 母鸡 ， 5 月份 下 了 450 个 蛋 ， 比 4 月份 多 下 了 36 个 ． 这 两个 月 一共 下 了 多少 个 蛋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15566", "content": "甲 、 乙 两 人 步行 速度 的 比 是 3 ： 2 ， 甲 、 乙 分别 从 a ， b 两地 同时 出发 ， 若 相向 而 行 ， 则 1 小时 后 相遇 ． 若 同 向 而 行 ， 则 甲 需要 多少 时间 才能 追 上 乙 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4634", "content": "6 （ 2 ） 班 有 40 个 同学 参加 数学考试 ， 及格率 是 97.5% ， 这次 考试 有 多少 个 同学 不及格 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13198", "content": "甲乙 两地 相距 630 千米 ， 甲乙 两车 同时 从 两地 相对 开出 ， 4.5 小时 后 相遇 ， 已知 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8796", "content": "某 商店 运 来 25 箱 苹果 和 20 箱 梨 ， 每箱 都 是 50 千克 ， 运 来 的 苹果 比 梨 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7348", "content": "商店 有 一种 衣服 ， 售价 68 元 ， 比 原价 便宜 15% ， 比 原来 定价 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10004", "content": "计算 ： 0.5 ^ 3 = ．", "knowledge": ["^"], "difficulty": 0.0, "length": 3}
-{"question_id": "21664", "content": "24 个 同学 在 操场上 围城 一个 圆圈 做 游戏 ， 每 相邻 两名 同学 之间 都 是 2 米 ， 这个 圆圈 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16484", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 (2/7) ， 这时 离 终点 还有 45 千米 ， 甲地 到 乙地 的 公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22814", "content": "把 3 米 长 的 电线 锯 成 4 段 ， 每 段长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22003", "content": "工人 叔叔 做 零件 ， 前 3 天 每天 做 125 个 ， 后 4 天 每天 做 160 个 ， 一 星期 工人 叔叔 做 零件 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2881", "content": "妈妈 给 小强 买 了 4 支 钢笔 ， 每支 钢笔 8 元 ， 又 用 了 5 元 钱 给 他 买 了 1 支 毛笔 ， 妈妈 给 小强 买 这些 笔 共用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2407", "content": "用 一辆 汽车 运 货物 ， 上午 运 4 次 ， 共运 15.6 吨 ， 下午 运 3 次 ， 比 上午 少运 2.5 吨 ， 全天 平均 每次 运货 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17009", "content": "小 玲 家养 了 46 只 鸭子 ， 24 只 鸡 ， 养 的 鸡 和 鹅 的 总数 比 鸭 多 5 只 ． 小 玲 家养 了 多少 只 鹅 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12051", "content": "修路 队 修 一条 公路 ， 每天 修 125 米 ， 修 了 22 天 后 还 余 50 米 没有 修 ， 那么 这 条 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4616", "content": "一 本书 有 120 页 ， 小 红 第一天 看 了 全书 的 (2/5) ， 第一天 看 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2271", "content": "学校 图书室 有 故事书 300 本 ， 科技 书 的 本 数 比 故事书 的 2 倍 少 40 本 ， 科 科 书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17520", "content": "( (1/3) + (1/6) + (1/10) + (1/15) ) + ( (2/3) + (2/6) + (2/10) + (2/15) ) + ( (3/6) + (3/10) + (1/6) * 0 ) + ( (1/6) * 1 + (1/6) * 2 ) + (1/6) * 3 = ．", "knowledge": ["*", "+"], "difficulty": 1.6, "length": 35}
-{"question_id": "877", "content": "甲 数 的 25% 等于 乙 数 的 75% ， 乙 数 是 40 ， 甲 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20246", "content": "甲 数 是 72 ， 乙 数 是 甲 数 的 (5/9) ， 甲乙 两 数 的 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9807", "content": "李 欢 同学 练习 跳远 ， 前 6 次 平均 跳 了 3.2 米 ， 又 跳 了 2 次 ， 前后 8 次 平均 跳 了 3.3 米 ， 最后 两次 平均 跳 了 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14735", "content": "灰 太 狼 步行 从 狼 堡 出发 到 羊 村 去 捉 羊 ， 用 2 小时 行 了 全程 的 (3/7) ， 它 到达 羊 村 还要 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10223", "content": "甲乙 两站 之间 的 铁路 长 420 千米 ， 一列 客车 和 一列 货车 分别 从 甲 站 和 乙 站 同时 相对 开出 ， 客车 每 小时 行 80 千米 ， 货车 的 速度 是 客车 的 (3/4) ． 经过 几小时 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3216", "content": "胜利村 要 挖 一条 8 千米 的 水渠 ， 每天 挖 (2/9) 千米 ， 多少 天 可以 挖 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17756", "content": "小 伟 同学 养 白兔 15 只 ， 黑 兔 30 只 ． 养 白兔 的 只 数 占 兔子 总数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9906", "content": "五年级 两个 班 的 学生 采集 树种 ， 一班 47 人 ， 每人 采集 了 0.25 千克 ， 二 班 45 人 共 采集 10.15 千克 ， 两个 班 一共 采集 树种 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6810", "content": "一 个 服装厂 原来 每天 生产 服装 160 套 ， 现在 每天 生产 240 套 ． 原来 30 天 生产 的 任务 ， 现在 多少 天 可以 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22023", "content": "运输队 有 18 辆 汽车 ， 全队 26 天 节约 汽油 819 千克 ， 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3521", "content": "说 稀奇 真 稀奇 ， 鸭子 队伍 里 混 只 鸡 ， 顺着 数 它 第 9 ， 倒 着数 它 18 ， 请 你 算 一 算 ， 小鸭子 一共 有 多少 只 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9888", "content": "四年级 同学 去 秋游 ， 每套 门票 和 车票 49 元 ， 一共 需要 104 套票 ， 应该 准备 多少 钱 买票 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9058", "content": "王 叔叔 4.5 分钟 加工 5 个 零件 ， 照 这样 计算 ， 加工 同样 的 2 个 零件 ， 需要 多少 分钟 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7519", "content": "果 店 运 来 一批 苹果 、 梨 和 香蕉 ， 苹果 的 重量 是 梨 的 (5/8) ， 梨 的 重量 相当于 香蕉 的 (4/5) ． 运 来 苹果 135 吨 ， 运 来 香蕉 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8979", "content": "王 阿姨 要 缝 320 件 棉衣 送给 灾区 群众 过冬 ， 已经 缝好 了 140 件 ， 剩下 的 要 在 4 天 内 完成 ． 平均 每天 缝 棉衣 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20908", "content": "妈妈 给 了 小 芳 一些 钱 ， 小 芳 买 学习 用具 用 了 14.5 元 ， 剩下 的 钱 比 用 去 的 少 1.7 元 ． 妈妈 给 了 小 芳 多少 元 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "799", "content": "小 明 家 的 花园 近似 一个 圆 ， 如果 它 的 直径 为 10 米 ， 那么 它 的 周长 约 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17190", "content": "三年级 （ 1 ） 班 有 36 人 ， 其中 9 人 是 女生 ， 男生 人数 是 女生 的 多少倍 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15979", "content": "某 茶具 店 规定 ： 凡 购买 一个 茶壶 赠送 一个 茶杯 ． 已知 每个 茶壶 15 元 ， 每个 茶杯 2.5 元 ． 李老师 购买 了 4 个 茶壶 和 一些 茶杯 共用 了 75 元 ， 李老师 买 回 了 多少 个 茶杯 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19185", "content": "一 个 隧道 长 2200 米 ， 一列 火车 通过 隧道 时 每分钟 行驶 800 米 ， 从 车头 开进 隧道 到 车尾 离开 隧道 共 需 5 分钟 ， 这 列 火车 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3743", "content": "挖 一条 3240 米 长 的 水渠 ， 计划 用 75 天 完成 ， 实际 每天 比 计划 多 挖 1.8 米 ， 实际 多少 天 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23016", "content": "学校 有 篮球 56 个 ， 足球 比 篮球 多 (1/8) ， 学校 有 多少 个 足球 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19625", "content": "工程队 要 挖 一条 3 千米 长 的 水渠 ， 每天 挖 全长 的 25% ， 多少 天 可以 挖 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17498", "content": "家电 商场 昨天上午 卖出 3 台 电风扇 ， 下午 又 卖出 同样 的 电风扇 5 台 ． 已知 每 台 电风扇 的 售价 相同 ， 且 下午 卖 的 电风扇 比 上午 多 收入 630 元 ． 每 台 电风扇 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15752", "content": "张 娟 从 家 到 学校 每分钟 走 65 米 ， 要 9 分钟 才 到 学校 ， 张 娟 家 到 学校 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20815", "content": "为了 美化 城市 环境 ， 园林 部门 在 一条 小路 的 一边 从头到尾 共 种 了 25 棵 银杏树 ， 每 相邻 两棵 银杏树 间隔 8.5 米 ， 这 条 路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10599", "content": "甲 、 乙 两车 同时 从 相距 1350 千米 的 两地 出发 ， 相向 而 行 ， 5 小时 后 还 相距 210 千米 ， 甲 车 每 小时 行 126 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2016", "content": "小 方 和 小 刚 每人 做 180 个 零件 ， 小 方 做 的 速度 比 小 刚 快 (1/5) ， 则 小 方 做 完 时 ， 小 刚 还 需要 做 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5466", "content": "老师 给 小朋友 们 发 糖果 ， 每人 发 一块 ， 小 冬 左边 有 8 个 小朋友 ， 小 冬 右边 有 7 个 小朋友 ， 一共 需要 多少 块 糖果 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8534", "content": "淘气 看 一 本书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 全书 的 (1/2) ， 还 剩 全书 的 几分 之 几 没 看 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21099", "content": "有 一条 10 米 长 的 彩绸 ， 其中 的 (3/4) 做成 了 彩旗 ． 这些 彩旗 的 (4/5) 用来 装饰 教室 ． 装饰 教室 的 彩旗 用 去 彩绸 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1686", "content": "王师傅 和 徒弟 小 李 共同 加工 一批 零件 ， 在 8 小时 中 ， 王师傅 加工 了 560 个 ， 小 李 加工 了 480 个 ， 王师傅 每 小时 比 小 李 每 小时 多 加工 了 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10419", "content": "一 种 彩电 先 降价 20% 优惠 出售 ， 后来 又 降价 5% ， 现在 的 价格 只 相当于 原价 的 百分之几 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2416", "content": "一 次 数学 竞赛 共有 10 题 ， 规定 每 做 对 一 题 得 8 分 ， 做 错 一 题 倒扣 3 分 ， 王 晶 得 了 47 分 ， 他 做 对 了 几题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14174", "content": "花店 运 来 198 朵 玫瑰花 ， 每 6 朵 扎 一束 ， 可以 扎成 多少 束 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21708", "content": "甲 数 为 24 ， 乙 数 比 甲 数多 (3/4) ， 则 乙 数 为 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17621", "content": "一 头 犀牛 的 体重 是 2.5 吨 ， 一头 鲸 的 体重 是 这 头 犀牛 的 19.8 倍 ． 这 头 鲸 的 体重 = 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22968", "content": "一 堆 煤 有 8 吨 ， 烧 了 (1/4) 吨 ， 还 剩 多少 吨 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5389", "content": "徒弟 8 小时 能 生产 96 个 零件 ， 师傅 的 工作效率 比 徒弟 工作效率 的 2 倍 多 6 个 ． 师傅 每 小时 能 生产 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4115", "content": "食堂 买来 60 棵 白菜 ， 吃 了 56 棵 ， 又 买来 30 棵 ， 现在 有 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6466", "content": "3 （ 1 ） 班 男生 比 女生 多 4 人 ， 男生 人数 占 全班 人数 的 (8/15) ． 全班 有 几 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17400", "content": "一 辆 玩具 小汽车 ， 原价 20 元 ， 打 0.9 出售 ， 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11355", "content": "明明 有 一 本书 ， 共有 400 页 ， 第一天 看 了 全书 的 35% ， 第 二 天 看 了 全书 的 (1/4) ， （ 先 补充 一个 两步 或 以上 的 问题 再 解答 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15760", "content": "花店 运进 624 朵 月季花 ， 每 12 朵 扎成 一束 ， 上午 已 卖出 34 束 ， 花店 还 剩下 月季花 多少 束 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6886", "content": "运 一批 货物 ， 每次 运 5.5 吨 ， 10 次 可以 运 完 ； 如果 要 8 次 运 完 ， 平均 每次 要 运 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3009", "content": "一 个 长方形 的 长 是 6 分 米 ， 宽 是 长 的 (3/4) ， 这个 长方形 宽 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3221", "content": "小 李 走 了 5 步 ， 一共 走 了 340 厘米 ， 小 李 平均 每步 走 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21648", "content": "小 明 参加 了 学校 的 课外阅读 考级 活动 ， 看 一本 192 页 的 《 鲁宾逊 漂流记 》 ， 第一天 看 了 全书 总 页数 的 (1/8) ， 第 二 天 看 了 全书 总 页数 的 (5/48) ， 他 两天 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9271", "content": "1 - (7/8) ， 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11596", "content": "一 堆土 ， 计划 每天 运 120 车 ， 需要 60 天运 完 ． 实际 提前 了 12 天运 完 ， 实际 每天 运 多少 车 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6042", "content": "赞 南 小学 阶梯教室 有 15 排座位 ， 每排 20 个 ． 一共 有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20501", "content": "修路 队 原 计划 每天 修路 16 米 ， 25 天 完成 任务 ， 实际 提前 5 天 完成 任务 ， 实际 每天 修路 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9125", "content": "水果店 运 来 40 筐 水果 ， 其中 苹果 占 (5/8) ， 苹果 有 多少 筐 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8425", "content": "一 项 工程 ， 实际 投资 510 万元 ， 比 计划 节约 15% ， 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "644", "content": "被减数 是 993 ， 减数 是 126 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5249", "content": "一 个数 的 (1/3) 是 2 ， 那么 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8142", "content": "计算 ： 12 * ( (1/3) + 0.25 ) = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20852", "content": "实验 小学 美术组 人数 是 科技 组 的 (2/3) ， 科技 组 人数 是 体育组 的 (3/10) ， 美术组 有 40 人 ， 体育组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10491", "content": "甲 、 乙 两车 从 相距 324 千米 的 两地 同时 相对 开出 ， 经 6 小时候 两车 在 中途 相遇 ， 已知 甲 车 的 速度 是 乙 车 的 (4/5) ， 求 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11511", "content": "一 桶 油 净重 48.5 千克 ， 如果 这种 油 每千克 卖 3.8 元 ， 这样 一桶 油 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "476", "content": "一 支 钢笔 现价 16 元 ， 是 原价 的 (4/5) ， 这 支 钢笔 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22808", "content": "“ 5 一 黄金周 ” 期间 ， 某 品牌 电视机 降价 20% 后 是 780 元 ． 该 品牌 电视机 的 原价 = 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15103", "content": "学校 去 买 桌椅 ． 如果 全 买 桌子 可 买 15 张 ； 如果 全 买 椅子 可 买 20 把 ， 如果 一张 桌子 2 把 椅子 为 一套 ， 学校 可 买 几套 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8337", "content": "某班 期末 评选 的 “ 3 好 学生 ” 有 6 人 、 “ 优秀 队员 ” 有 8 人 ， 共 占 全班 总 人数 的 35% ， 这个 班 共有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18730", "content": "工地 要 运 钢筋 63 吨 ， 甲队 运 了 总数 的 (4/7) ， 乙 队 运 的 比 甲队 的 (3/4) 多 8 吨 ， 甲乙 两队 共运 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "12054", "content": "刘 天 为 参加 新年 联欢会 的 演出 定制 了 一套 带 帽子 的 服装 ， 上衣 45 元 ， 占 总价 的 37.5% ， 帽子 的 价格 占 总价 的 (1/8) ， 帽子 的 价格 = 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12728", "content": "实验 小学 六年级 有 6 个 班 ， 每班 有 学生 50 人 ， 占 全校学生 总 人数 的 (1/6) ． 五年级 学生 人数 占 全校学生 总 人数 的 (2/9) ， 五年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11228", "content": "小 明 家 参加 家庭 财产保险 ， 参加 保险 的 财产 总额 是 56000 元 ， 如果 每年 的 保险费率 是 1.5% ， 小 明 家 每年 应付 保险费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12541", "content": "8642 - 7531 + 6420 - 5317 + 4280 - 3157 + 2084 - 1753 = ．", "knowledge": ["+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "2890", "content": "挖 一条 水渠 ， 已经 挖 了 全长 的 (3/5) ， 正好 是 240 米 ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14204", "content": "一 辆 货车 从 县城 到 乡下 ， 去 的 时候 用 了 5 小时 ， 车 的 速度 40 千米 / 小时 ． 返回 时 只用 了 4 小时 ， 你 能 算 出 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4447", "content": "小 红 带 了 980 元 钱 ． 买 一辆 自行车 用 去 276 元 ， 买 一台 电风扇 用 去 189 元 ． 小 红 还 剩 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4880", "content": "4 （ 1 ） 班 学生 在 全长 100 米 的 跑道 上 每隔 10 米 摆 一 盆花 （ 两端 要 摆 ） ， 一共 需要 多少 盆花 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21873", "content": "某 厂 一 车间 有 男 职工 232 人 ， 女职工 348 人 ， 男 职工 占 职工 总数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "450", "content": "水果店 运 来 的 苹果 比 梨 多 240 千克 ， 苹果 的 重量 是 梨 的 1.5 倍 ， 梨 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8352", "content": "一 个数 扩大 到 它 的 10 倍 后 与 原来 这个 数 相加 的 和 是 84.15 ， 原来 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "62", "content": "甲 、 乙 两车 从 a 、 b 两城 同时 相对 开出 ， 甲 车 平均 每 小时 行驶 75.5 千米 ， 乙 车 平均 每 小时 行驶 65.5 千米 ， 经过 4.5 小时 两车 在 途中 相遇 ． a 、 b 两城 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6362", "content": "生产 车间 本月 制造 零件 1472 个 ， 比 上个月 超产 15% ， 上个月 制造 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20355", "content": "小 红 买 了 8 束 鲜花 ， 每 束 9 朵 ， 送给 小 青 后 还 剩 23 朵 ． 送给 小 青 多少 朵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11969", "content": "桌上 有 10 根 蜡烛 ， 第一次 被 风 吹灭 4 根 ， 第 二 次 被 吹灭 3 根 ， 把 窗户 关 好 后 再也 没有 蜡烛 被 吹灭 ． 桌上 最后 有 多少 根 蜡烛 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9490", "content": "学校 有 20 个 足球 ， 篮球 比 足球 少 (1/5) ， 篮球 有 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14863", "content": "甲 、 乙 两车 分别 从 a 、 b 两地 同时 出发 ， 相向 而 行 ， 甲 每 小时 行 50 千米 ， 乙 每 小时 行 40 千米 ， 甲 比 乙 早 1 小时 到达 中 点 ． 甲 几小时 到达 中 点 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4755", "content": "“ 5 一 ” 期间 ， 中百 仓储 举行 0.85 的 促销 活动 ， 张 佩 买 了 一条 裤子 花 了 102 元 ， 这 条 裤子 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13865", "content": "学校 合唱队 有 80 人 ， 其中 六年级 学生 占 合唱队 总 人数 的 (2/5) ， 四年级 学生 占 合唱队 总 人数 的 (3/8) ， 其余 的 是 五年级 学生 ， 合唱队 中 我们 五年级 的 学生 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13037", "content": "小 红 家 今年 用水 36 吨 ， 比 去年 节约 了 4 吨 ， 比 去年 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11063", "content": "口 算 比赛 ， 小 珍 做 了 200 道 ， 错误率 为 5% ， 做 对 了 多少 道 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16675", "content": "修路 队 修 了 一条 路 ， 已修 了 596 米 ， 还 剩 256 米 没有 修 ， 这 条 路 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14026", "content": "一 个数 的 80% 倍 比 45 的 (3/5)   多 5 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15585", "content": "有 一列 火车 ， 长 168 公尺 ， 以 每秒 5 公尺 的 速度 通过 了 一座 862 公尺 长 的 铁桥 ， 问 自 车头 进 桥 到 车尾 离 桥 ， 一 共用 了 多少 秒 ﹖", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12911", "content": "5 个 7 相加 ， 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16234", "content": "梨树 有 30 棵 ， 桃树 的 棵 数 比 梨树 少 (2/5) ， 桃树 有 多少 棵 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15113", "content": "商店 有 5 箱 水果 ， 从 每箱 取出 6 千克 后 ， 余下 的 水果 恰好 是 原来 3 箱 水果 的 质量 ， 原来 每箱 水果 重 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12030", "content": "一 个数 的 (1/3) 是 12 ， 这个 数 的 (1/2) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13708", "content": "甲 数 是 8.9 ， 比 乙 数多 1.6 ， 乙 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17431", "content": "小 亚 体重 40.5 千克 ， 小 丁丁 比 她 轻 2.8 千克 ， 小胖 比 小 丁丁 重 6.5 千克 ． 小胖 体重 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10819", "content": "一 份 稿件 有 24 页 ， 每页 有 500 个 字 ， 李 华 将 此 稿件 重新 排版 之后 ， 每页 的 字数 为 600 个 ， 现在 的 页数 比 原来 少 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16956", "content": "要 下雨 了 ， 小 莉 看见 远处 有 闪电 ， 4 秒 后 听到 了 雷声 ， 请问 闪电 的 地方 离 小 莉 有 多 远 ？ （ 雷声 在 空气 中 的 传播速度 是 0.34 千米 / 秒 ． ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "310", "content": "用 火车 装运 一批 钢材 ， 14 节车厢 可 装运 840 吨 ． 照 这样 计算 ， 一列 火车 有 32 节车厢 ， 可 装运 钢材 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11394", "content": "100 克 15% 浓度 的 盐水 中 ， 放进 了 盐 8 克 ， 为 使 溶液 的 浓度 为 20% ， 那么 ， 还 得 再 加进 水 多少 克 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5348", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 4 小时 行 了 280 千米 ， 用 同样 的 速度 ， 一共 行 了 7 小时 到达 乙 ， 甲乙 两 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14768", "content": "丽丽 家 上 月 用电 50 度 ， 本月 比 上 月 节约 了 10 度 ， 比 上 月 节约 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3544", "content": "一 份 文稿 3600 字 ， 陈 叔叔 20 分钟 打 了 (1/3) ， 平均 每分钟 打字 几个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2149", "content": "一 根 竹笋 ， 从 发芽 到 长大 ， 匀速 生长 ， 经过 10 天 可以 长 到 40 分 米 ， 那么 ， 当 长 到 16 分 米 时 经过 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "232", "content": "一 台 计算器 的 价钱 是 35 元 ， 一台 电脑 的 价钱 是 它 的 90 倍 ， 买 一台 电脑 和 一只 计算器 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7475", "content": "某 商场 2 月份 的 营业额 是 320 万元 ， 比 一月份 增加 了 (1/3) ， 一月份 的 营业额 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3935", "content": "248 * 125 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18224", "content": "一 共有 25 个 小组 参加 植树 ， 每个 小组 种 了 5 棵 树苗 ． 购买 树苗 花 了 1250 元 ， 每棵 树苗 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18944", "content": "修 一段 公路 ， 已修 了 90 米 ， 比 未 修 的 70% 少 15 米 ， 这 条 公路 还有 多少 米 未 修 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20608", "content": "某 电脑 销售 公司 2009 年 上半年 共 销售 电脑 4500 台 ， 占 全年 计划 的 (5/13) ， 全年 计划 销售 电脑 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16621", "content": "修 一条 公路 ， 第一周 修 了 这 条 路 的 (2/5) ， 第 二 周 修 了 这 条 路 的 (1/4) ， 再 修 14 千米 就 完成 任务 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10498", "content": "红旗 服装厂 昨天上午 卖出 120 套 童装 ， 下午 卖出 185 套 童装 ． 今天 卖出 的 是 昨天 的 2 倍 ， 今天 卖出 童装 多少 套 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19617", "content": "王大爷 养 了 65 只 白兔 ， 养 的 灰 兔 比 白兔 的 2 倍 还 多 8 只 ， 王大爷 养 灰 兔 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7707", "content": "小 明 今年 10 岁 ， 爷爷 的 年龄 是 他 的 6 倍 多 4 岁 ， 爷爷 今年 多少岁 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22301", "content": "小 明 把 1500 元 压岁钱 放到 银行 去 存 2 年 ， 年利率 是 3.25% ， 到期 时 小 明 能 取回 多少 元 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2544", "content": "水果店 有 8 箱 桔子 ， 每箱 重 20 千克 ， 桔子 的 重量 是 白梨 的 4 倍 ． 水果店 有 白梨 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21116", "content": "小 明 (2/3) 小时 走 了 2 km ， 他 平均 每 小时 走 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17654", "content": "一 桶 水 ， 当 冰 化成 水 时 ， 它 的 体积 减少 了 (1/11) ， 那么 当 水 结成 冰 时 ， 它 的 体积 增加 了 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21453", "content": "王大爷 买 24 只 小鸡 花 了 72 元 钱 ， 他 还要 再 买 50 只 这样 的 小鸡 ， 王大爷 还要 花 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11845", "content": "某 养殖场 有 鹅 520 只 ， 鸭 的 只 数 比 鹅 的 2 倍 少 200 只 ， 鸭 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21016", "content": "王老师 在 超市 买 4.5 千克 豆角 ， 付给 售货员 10 元 ， 售货员 找回 1.9 元 ， 每千克 豆角 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21767", "content": "把 一块 蛋糕 平均 分给 8 个 小朋友 ， 每个 小朋友 吃 了 2 块 蛋糕 后 ， 还 剩下 4 块 ． 这块 蛋糕 分成 了 多少 块 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9522", "content": "李 小 军 按 0.9 优惠 的 价格 购买 了 3 张 足球赛 的 门票 ， 一 共用 去 81 元 ． 每张 门票 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5578", "content": "聪聪 今年 13 岁 ， 爷爷 的 年龄 比 聪聪 的 年龄 的 4 倍 还 多 12 岁 ， 爷爷 多 大 年龄 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13480", "content": "(3/5) 小时 的 (4/5) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10229", "content": "明明 爷爷 今年 的 年龄 加上 17 后 ， 再 缩小 4 倍 ， 再 减去 15 后 ， 扩大 10 倍 ， 恰好 是 100 岁 ， 明明 爷爷 今年 多少岁 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8835", "content": "汽车厂 去年 计划 生产 一批 汽车 ， 结果 上半年 完成 全年 计划 的 (5/9) ， 下半年 完成 全年 计划 的 (3/5) ， 超产 3360 辆 ． 去年 计划 生产 汽车 多少 辆 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9839", "content": "一 本书 看 完 了 48 页 ， 占 全书 总 页数 的 (3/4) ， 这 本书 的 (1/2) 有 多少 页 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3812", "content": "小 红 带 了 200 元 钱 买 了 一些 2.5 元 一支 的 玫瑰 ， 又 买 了 一个 50 元 的 花瓶 ， 还 找回 12.5 元 ， 小 红 买 了 多少 支 玫瑰 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10273", "content": "客车 和 货车 同时 从 相距 300 千米 的 两城 相对 开出 ， 经过 2.5 小时 后 两车 在 途中 相遇 ， 客车 每 小时 行 65 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20363", "content": "一 本书 已经 读 了 75% ， 比 没 读 的 多 40 页 ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16414", "content": "一 本书 ， 每天 看 9 页 ， 已经 看 了 4 天 ， 还 剩下 25 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14294", "content": "亮 亮 去 书店 ， 看到 一套 《 童话故事 》 标价 如下 ： 每套 16 本 ， 每 本 15.5 元 ， 亮 亮 用 会员卡 买 了 一套 ， 只用 了 218.7 元 ． 它 使用 会员卡 节省 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7290", "content": "上海 到 武汉 的 航道 长 1075 千米 ． 两艘 轮船 同时 从 上海 和 武汉 相对 开出 ， 经过 25 小时 两 船 在 途中 相遇 ． 已知 从 上海 开出 的 轮船 每 小时 行 19 千米 ， 那么 从 武汉 开出 的 轮船 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9631", "content": "一 块 地 的 形状 近似于 平行四边形 ， 底 为 23 米 ， 高 为 15 米 ． 如果 每平方米 栽 瓜秧 9 棵 ， 那么 这块 地 共 能 栽 瓜秧 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12205", "content": "要 修 一条 长 500 米 的 公路 ， 已经 修 了 200 米 ， 已经 修 了 这 条 公路 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16922", "content": "六年级 有 24 人 没有 通过 体育 达标 测试 ， 全年 级 达标率 为 88% ， 通过 体育 测试 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "828", "content": "一 列 火车 3 小时 行 270 千米 ， 一辆 汽车 5 小时 行 350 千米 ， 火车 的 速度 比 汽车 的 速度 快 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2400", "content": "6.73 + 2.56 + 1.44 + 3.27 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6746", "content": "巴蒂尔 的 体重 是 125 千克 ， 比 奥尼尔 的 体重 少 85 千克 ， 奥尼尔 的 体重 = 多少 千克 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10301", "content": "一 台 录音机 115 元 ， 一台 冰箱 的 价钱 是 一台 录音机 的 21 倍 ， 一台 冰箱 的 价钱 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10587", "content": "修 一条 长 400 米 长 的 路 ， 第一天 修 了 25% ， 第 二 天 修 了 30% ， 两天 共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15626", "content": "数学 资料 每 本 5.35 元 ， 王老师 和 5 （ 1 ） 班 41 名 同学 各 买 一本 ， 共 需 付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9355", "content": "英华 学校 合唱队 有 132 名 学生 ， 体操队 的 人数 是 合唱队 的 3 倍 ， 体操队 和 合唱队 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13070", "content": "有 一只 长颈鹿 高 5 米 ， 比 一头 大象 还要 高 (2/3) ． 这 头 大象 高 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18231", "content": "124 * 126 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2802", "content": "一 盒 糖 ， 如果 每人 发 9 块 ， 能 发给 24 个人 ， 如果 每人 发 8 块 ， 能 发给 几个 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13426", "content": "小 明 看 一本 小说 ， 第一天 看 了 全书 的 (1/8) 还 多 21 页 ， 第 二 天 看 了 全书 的 (1/6) 少 4 页 ， 还 剩 102 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6605", "content": "一 个 机关 精简 后 有 工作人员 120 人 ， 比 原来 人员 少 40 人 ， 精简 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3107", "content": "小 李 骑 摩托车 上山 每 小时 行 20 千米 ， 3 小时 到达 山顶 ． 下山 只用 2 小时 ， 求 小 李 骑 摩托车 往返 的 平均速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18300", "content": "一 个 足球 原价 105 元 ， 国庆 期间 0.75 优惠 ， 这 期间 买 这个 足球 可 节省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12588", "content": "同学 们 浇 树 ， 三年级 浇 了 23 棵 ， 四年级 浇 的 棵 数 是 三年级 的 2 倍 ， 六年级 浇 的 棵 树 比 三年级 和 四年级 浇 的 总数 还 多 18 棵 ． 六年级 一共 浇 了 多少 棵 树 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6391", "content": "思思 转 了 27 个 ， 茵茵 转 的 是 思思 的 3 倍 还 多 4 个 ． 茵茵 转 了 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3628", "content": "珠海 少年宫 的 小 记者 班 分为 上 、 下午 班 ， 上午 班 有 1120 人 ， 下午 班 人数 为 小 记者 班 总 人数 的 (2/7) ， 请问 小 记者 班 一共 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18462", "content": "甲乙 两地 之间 的 公路 长 216 千米 ． 一辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 37.5% % ， 离 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1468", "content": "一 辆 大巴车 从 张 村 出发 ， 如果 每 小时 行驶 60 千米 ， 4 小时 就 可以 到达 李 庄 ． 结果 只用 了 3 个 小时 就 到达 了 ． 这辆 汽车 实际 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21543", "content": "儿童 电影院 共有 两层 ， 楼上 有 240 个 座位 ， 楼下 有 9 排座位 ， 每排 32 个 座位 ， 这个 电影院 观众席 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8825", "content": "玫瑰花 16 元 一束 ， 买 3 束 送 一束 ， 一次 买 3 束 ， 每 束 便宜 了 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13571", "content": "希望 小学 三年级 有 男 学生 218 人 ， 女 学生 189 人 ． 希望 小学 三年级 一共 有 学生 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21037", "content": "小聪明 的 身高 是 13.5 分 米 ， 小淘气 比 小聪明 高 0.7 分 米 ， 比 小可爱 矮 1 分 米 ． 小可爱 的 身高 = ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3121", "content": "一 辆 客车 从 甲 站 开出 时 正好 满座 ， 到达 乙 站 是 有 (1/4) 的 乘客 下车 ， 又 有 15 人 上车 ， 这时 还有 3 人 没有 座位 ， 现在 车上 有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "538", "content": "张 大伯 把 一车 蔬菜 送到 菜市场 ， 去 时 的 速度 40 千米 / 时 ， 用 了 3 小时 送到 ， 返回 时 只用 了 2 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22936", "content": "三年级 学生 6 个 组 做 儿童玩具 72 件 ， 平均 分给 4 个 幼儿班 ， 每个 班 分 玩具 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21750", "content": "一 只 熊猫 重 432 千克 ， 大象 的 体 重量 是 熊猫 的 8.6 倍 ， 一只 大象 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13750", "content": "一 个数 的 (4/5) 是 80 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9671", "content": "一 辆 汽车 由 重庆 开出 ， 每 小时 行 68 km ， 5 小时 到达 成都 ， 如果 要 提前 1 小时 到达 ， 每 小时 行 多少 km ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13023", "content": "星期天 ， 芳 芳 在家 收拾 房子 ． 她 准备 将 自己 的 书 搬 到 另 一个 房间 ， 她 一次 可以 搬 13 本书 ， 一共 搬 了 10 次 ， 最后 发现 还有 20 本书 没有 搬 ， 你 能 知道 芳 芳 一共 有 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5259", "content": "一 个 游泳池 换水 ， 第一次 放掉 500 立方米 的 水 ， 第 二 次 放掉 700 立方米 的 水 ， 这时 剩下 全 池水 的 (2/5) ． 池里 原来 一共 有 水 多少 立方米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7213", "content": "一 列 快车 和 一列 慢车 同时 从 甲乙 两地 相同 而 行 ， 慢车 每 小时 行 50 千米 ， 快车 每 小时 比 慢车 快 20% ， 经过 2.5 小时 ， 两车 相遇 ， 请问 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "16404", "content": "甲 、 乙 两地 相距 500 千米 ， 火车 行 完全 程 要 5 小时 ， 汽车 行 完全 程 要 8 小时 ， 小 王 从 甲地 出发 ， 先 坐 2 小时 火车 后 改乘 汽车 到达 乙地 ， 他 从 甲地 到 乙地 共用 了 多少 小时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22209", "content": "一 件 羽绒衣 的 原价 是 400 元 ， 受 天气 影响 ， 现在 售价 提高 了 (2/5) ． 这件 羽绒衣 的 现价 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18591", "content": "甲 、 乙 两地 相距 425 千米 ， 一辆 汽车 从 甲地 到 乙地 ， 已经 行 了 173 千米 ， 剩下 的 路程 每 小时 行 42 千米 ， 还要 几小时 才能 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19366", "content": "挖 一条 3 千米 长 的 水渠 ， 每天 挖 它 的 (1/4) ， 多少 天 可以 挖 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3300", "content": "一 架飞机 每分钟 飞行 15 千米 ， 从 北京 到 银川 用 86 分钟 ， 从 北京 到 银川 约 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13567", "content": "草地 上 有 一群 蝴蝶 ， 花蝴蝶 占 总数 的 (1/3) ， 其余 的 是 黄蝴蝶 ， 黄蝴蝶 占 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20915", "content": "37 与 35 的 和 ， 除以 75 与 72 的 差 ， 商 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2295", "content": "一 本 故事书 ， 小 玲 第一天 读 了 全书 的 (1/3) ， 第 二 天 读 了 21 页 ， 还有 47 页 没有 读 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19578", "content": "张师傅 要 修 100 条 凳子 ， 已经 修好 了 36 条 ， 剩下 的 每 小时 修 16 条 ， 还要 几小时 才能 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1702", "content": "一 个数 的 80% 比 45 的 (3/5) 少 5 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22426", "content": "宁宁 看 一本 356 页 的 故事书 ， 平均 每天 看 21 页 ， 看 了 13 天 后 ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17829", "content": "小 明 买 了 一支 钢笔 和 一支 圆珠笔 ， 钢笔 的 单价 是 10.55 元 ， 圆珠笔 的 单价 是 2.78 元 ， 小 明 一共 花 了 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22954", "content": "一 堆 货物 ， 甲 车 运走 24 吨 ， 乙 车运 的 是 甲 车 的 (3/4) ， 丙 车运 的 是 乙 车 的 (2/3) ． 丙 车运 了 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "904", "content": "学校 原有 足球 和 篮球 共 36 个 ， 足球 与 篮球 的 比 是 7 ： 2 ， 又 买进 一些 足球 后 ， 足球 占 总数 的 80% ， 又 买进 足球 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22315", "content": "一 台 电视机 原价 4500 元 ， “ 十一 ” 节 期间 0.9 优惠 ， 买 一台 这样 的 电视机 能 节省 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "335", "content": "学校 买来 45 套 单人 课桌椅 ， 每张 课桌 128 元 ， 每 把 椅子 52 元 ． 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10212", "content": "一 个 面包 要 2.5 元 ， 一瓶 饮料 要 3.4 元 ． 买 一瓶 饮料 比 买 一个 面包 要 多付 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21018", "content": "一 个数 里面 有 256 个 320 ， 这个 数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8527", "content": "除数 是 7 ， 商 是 9 ， 余数 是 5 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10791", "content": "国光 超市 今天 卖出 苹果 和 香蕉 各 12 筐 ， 每 筐 苹果 35 千克 ， 每 筐 香蕉 25 千克 ． 今天 国光 超市 一共 卖出 多少 千克 苹果 和 香蕉 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10604", "content": "某班 男生 人数 是 女生 人数 的 (2/3) ， 在 一次 考试 中 ， 男生 的 平均分 是 90 分 ， 女生 的 平均分 是 82 分 ． 全班 的 平均分 = 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19909", "content": "一 个 圆柱体 的 侧 面积 是 12.56 平方厘米 ， 底面 半径 是 2 厘米 ， 它 的 高 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20093", "content": "1 小桶 醋 重 2 千克 ， 5 小桶 醋 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7262", "content": "甲 、 乙 两地 相距 471 千米 ， 一辆 客车 和 一辆 货车 同时 分别 从 两地 相对 开出 ， 经过 3 小时 相遇 ． 已知 客车 每 小时 行 82 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17038", "content": "一 辆 中巴车 从 甲地 开 行为表现 乙地 ， 平均 每 小时 行驶 40 千米 ， 4.5 小时 到达 乙地 ， 返回 时 比 原来 少 用 了 0.5 小时 ． 这辆 中巴车 返回 时 平均 每 小时 行驶 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6307", "content": "老师 要求 学生 用 1 和 2 这 两个 数字 写 一个 两位数 ， 8 个 学生 中 ， 至少 有 多少 个 学生 写 的 数 相同 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21753", "content": "一 根 电线 长 24 米 ， 第一次 用 去 (1/4) ， 第 二 次 用 去 (1/2) 米 ， 两次 一 共用 去 电线 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8112", "content": "某班 的 出勤率 是 98% ， 已知 到校 的 人数 是 49 人 ， 该班 的 总 人数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17502", "content": "学校 买 了 8 个 篮球 ， 每个 32 元 ， 一 共用 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "837", "content": "仓库 里 原有 一批 粮食 ， 运出 25% 后 ， 又 运进 240 吨 ， 这时 仓库 粮食 的 质量 比 原来 的 多 80 吨 ， 仓库 里 原有 粮食 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5887", "content": "某 宾馆 12 月 的 营业额 是 240 万元 ， 按规定 要 缴纳 5% 的 营业税 ， 还要 按 营业税 的 7% 缴纳 城市 维护 建设 税 ． 本月 应 缴纳 营业税 和 城市 维护 建设 税 各 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "16536", "content": "霞光 服装厂 与 某 商场 签订 了 1200 套 儿童服装 的 供货 合同 ． 在 以 每天 加工 150 套 的 速度 ， 生产 了 4 天 后 ， 商场 要求 剩下 的 服装 必须 在 3 天 内 全部 供 出 ． 霞光 服装厂 接下来 平均 每天 应 加工 多少 套 服装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19698", "content": "2.4 - 0.8 的 差 乘以 (3/4) ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16346", "content": "修路 队 修路 ， 第一天 修 (25/6) 千米 ， 比 第 二 天 少 修 了 (1/3) 米 ， 两天 共 修 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6787", "content": "一 袋 大米 重 5 千克 ， 第一次 吃 了 它 的 (1/5) ， 第 二 次 比 第一次 多 吃 了 (1/8) ， 还 剩 这 袋 大米 的 几分 之 几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "19438", "content": "亚 奥特 牛 场 培育 的 一头 小 奶牛 出生 时 重 30.5 千克 ， 3 个 月 后 重 77.3 千克 ， 平均 每月 增长 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17007", "content": "爸爸 的 集邮册 里 ， 每页 插 3 行 邮票 ， 每行 插 6 张 ， 14 页 一共 可以 插 多少 张 邮票 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "132", "content": "修路 队 修 一条 公路 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 全长 的 20% ， 两天 共 修 了 3.6 千米 ， 这 条 公路 有 多长 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13373", "content": "青青 小学 1 到 6 年级 ， 平均 每个 年级 为 灾区 捐款 405 元 ， 这个 学校 共 捐款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14028", "content": "一 批 货物 的 (1/2) 比 这 批 货物 的 (1/3) 多 70 吨 ， 这 批 货物 共 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21989", "content": "在 ☆ / 7 = 9 … □ 中 ， □ 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "414", "content": "王 爷爷 家养 了 巨型 高产 长毛兔 ， 兔 舍 有 4 层 ， 每层 有 15 只 ． 平均 每 只 兔 年产 兔毛 0.821 千克 ． 王 爷爷 家 一年 共产 兔毛 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3484", "content": "一 根 电线 长 14 米 ， 用 去 (2/7) ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5317", "content": "一 辆 汽车 行 (8/5) 千米 耗油 (1/6) 升 ． 照 这样 计算 ， 平均 每 千米 需要 耗油 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15418", "content": "爸爸 给 小雨 买 了 一个 书包 ， 原价 150 元 ， 现在 商店 打 0.8 出售 ， 爸爸 买 书包 花 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9148", "content": "某 玩具厂 要 生产 6480 个 小 皮鼓 ， 原 计划 每天 做 80 个 ， 实际 每天 比 原 计划 多 做 10 个 ， 完成 任务 时 ， 实际 比 原 计划 少 用 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18344", "content": "320 - 68 的 差 除以 4 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1415", "content": "小 明 将 自己 积攒 的 压岁钱 8000 元 存入 银行 ， 整存整取 一年 ， 他 准备 将 到期 后 的 利息 捐给 “ 希望工程 ” ， 如果 按 年利率 2.75% 计算 ， 到期 后 ， 小 明 可以 捐给 “ 希望工程 ” 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2448", "content": "甲 、 乙 两车 同时 从 两地 相向 开出 ， 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 50 千米 ， 经过 (5/6) 小时 后 两车 相遇 ， 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8568", "content": "孙 刚 有 一本 故事书 ， 第一个 月 读 了 全书 的 40% ， 第 二 个 月 读 了 余下 的 60% ， 这时 还 剩下 120 页 没有 读 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15503", "content": "135 - 7 与 12 的 积 ， 再 乘 4 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16570", "content": "小 明 看 一本 160 页 的 故事书 ， 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 了 (1/3) ， 还 剩下 全书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16216", "content": "装修 一个 会议室 ， 用 边长 3 分 米 的 方砖 需要 160 块 ． 如果 改用 边长 4 分 米 的 方砖 来 铺 ， 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18641", "content": "苹果 售价 3.7 元 / 千克 ？ 妈妈 买 了 3.42 千克 ， 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12696", "content": "欢欢 今年 10 岁 ， 爸爸 的 年龄 比 欢欢 的 3 倍 多 2 岁 ， 爸爸 今年 多少岁 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16958", "content": "四年级 有 78 个 男生 ， 是 女生 的 3 倍 ， 一共 有 几 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18479", "content": "木工 要 做 1400 张 桌子 ， 已经 做好 了 520 张 ， 剩下 的 要 用 16 天 完成 ， 平均 每天 要 做 多少 张 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1093", "content": "超音速 飞机 每秒 飞行 0.5 km ， 火车 每秒 行驶 0.025 km ， 超音速 飞机 的 速度 是 火车 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "570", "content": "小张 和 小 李 在 400 米 的 环形 跑道 上 跑步 ， 两 人 同时 从 同一 地点 出发 ， 反向而行 ． 小张 每秒 跑 4 米 ， 小 李 每秒 跑 6 米 ， 经过 多少 秒 两 人 第一次 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3565", "content": "一 根 电线 长 20 米 ， 用 去 它 的 75% ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16848", "content": "一 个 建筑队 原 计划 7 月份 筑路 (11/10) 千米 ， 结果 上 半月 筑路 (4/5) 千米 ， 下半月 筑路 (13/20) 千米 ． 实际 超过 计划 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2365", "content": "一 辆 卡车 一天 共运 苹果 260 筐 ， 其中 105 筐 是 上午 运 的 ， 下午 比 上午 多 运 多少 筐 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15666", "content": "校园 里 有 杨树 24 棵 ， 杨树 棵 树 是 柳树 的 (2/3) ． 校园 里 有 杨树 和 柳树 共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13440", "content": "小朋友 做 了 62 朵 大红花 ， 送给 幼儿园 27 朵 ， 剩下 的 大红花 平均 分成 5 份 ， 每份 有 几朵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20879", "content": "甲 、 乙 、 丙 3 人 ， 甲 每分钟 走 100 米 ， 乙 每分钟 走 90 米 ， 丙 每分钟 走 80 米 ， 甲 从 东村 ， 乙 、 丙 从 西村 同时 出发 ， 相向 而 行 ， 途中 甲 、 乙 相遇 后 1 分钟 又 与 丙 相遇 ， 东西 两 村 的 距离 = 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1489", "content": "一 个 棱 长 为 6 cm 的 正方体 纸盒 ， 它 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18127", "content": "一 篇 课文 ， 每行 28 个 字 ， 排 了 107 行 ， 这 篇 课文 有 多少 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5265", "content": "一 根 小 棒 锯 成 长度 相等 的 段 数 共 锯 了 4 次 ， 没有 重叠 据 ， 每 段 是 这根 小 棒 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7732", "content": "东 院里 有 400 只 鸡 ， 西 院里 的 鸡 比 东 院 少 (3/8) ， 西院 比 东 院 少 多少 只 鸡 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20440", "content": "学校 准备 发 练习本 ， 发给 15 个 班 ， 每班 144 本 ， 全校 还 需要 留 40 本 作为 备用 ． 学校 应 买 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7209", "content": "某 军事 学校 原 计划 每月 烧煤 48 吨 ， 改进 烧煤 方法 后 ， 每月 节约 25% ， 现在 每月 烧煤 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8909", "content": "一 个数 的 3 倍 与 9.6 的 差 ， 是 3.7 的 4 倍 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17932", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 完全 程 的 (2/5) 还 多 20 千米 ， 这 是 离 乙地 还有 70 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18456", "content": "两辆 汽车 都 从 a 地 开往 b 地 ， 甲 车 每 小时 行 40 千米 ， 先行 2 小时 后 ， 乙 车 才 出发 ， 经过 5 小时 乙 车 追 上 甲 车 ． 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22780", "content": "林场 有 松树 234 棵 ， 比 柏树 多 56 棵 ． 林场 里 松树 和 柏树 一共 有 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3357", "content": "修路 队 要 在 海景 公园 内 修 一条 游客 通道 ， 已经 修 了 1000 ， 恰好 是 整条 通道 长 的 (5/6) ， 这 条 游客 通道 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10868", "content": "学校 舞蹈队 有 60 人 ， 合唱队 的 人数 是 舞蹈队 的 (3/4) ， 合唱队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11434", "content": "同学 们 做 纸花 ． 做 红花 107 朵 ， 做 黄花 35 朵 ， 做 白花 26 朵 ． 做 红花 的 朵 数 比 黄花 和 白花 的 总 朵 数多 几朵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2554", "content": "18.2 与 11.7 的 和 乘 2.5 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5227", "content": "一 堆 煤 用 去 24 吨 ， 还 剩下 36 吨 ， 用 去 的 占 剩下 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6750", "content": "1 - (2/3) ， 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15101", "content": "甲 、 乙 两个 工程队 抢修 一条 灾区 公路 ， 它们 从 两端 同时 施工 ， 甲队 每天 修 8.5 千米 ． 乙 队 每天 修 6.5 千米 ， 5 天 修 完 ， 这 条 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10713", "content": "波斯 登 羽绒服 ， 夏季 打 0.85 后 卖 425 元 ， 这种 羽绒服 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3697", "content": "一 堆 煤 有 9 吨 ， 运走 了 (1/3) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7045", "content": "新星 幼儿园 买 回 一批 月饼 ， 发给 小班 小朋友 (2/7) ， 中 班 小朋友 (3/7) ， 大 班 小朋友 (1/7) ． 小班 和 中 班 一共 发 了 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8984", "content": "学校 买 回 480 盆花 ， 放在 8 个 花坛 里 ， 平均 每个 花坛 放 多少 盆 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11380", "content": "某 工厂 今年 十 月份 计划 用电 5000 度 ， 实际 只用 了 4500 度 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1718", "content": "1 千克 桃子 4 元 ， 24 元 可以 买 多少 千克 桃子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22552", "content": "有 一条 长 多少 米 的 电线 ， 用 去 25 米 ， 还 剩下 全长 的 (4/9) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1999", "content": "一 本 字帖 48 元 ， 一套 画片 65 元 ， 小 东 买 了 1 本 字帖 和 2 套 画片 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21294", "content": "有 桔子 1400 千克 ， 有 苹果 1575 千克 ， 桔子 每箱 35 千克 ， 苹果 每箱 25 千克 ， 共 可 装 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18487", "content": "小 妍 在 计算 一道 除法 题 时 ， 把 除数 72 看作 27 ， 结果 商 是 24 ， 正确 的 商 应该 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14084", "content": "为了 迎接 “ 6 • 一 ” 国际 儿童节 ， 玩具厂 4 月份 计划 生产 玩具 12000 件 ， 实际上 半月 生产 7000 件 ， 要 超额 全 月 计划 的 (3/20) ， 下半月 还要 生产 多少 件 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21757", "content": "一 件 工作 ， 某人 3 天 完成 (3/8) ， 照 这样 计算 剩下 的 工作 还要 多少 天 完成 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22846", "content": "一 件 衣服 打 0.75 后 是 120 元 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10560", "content": "小林 2 分钟 走 96 米 ， 用 这样 的 速度 他 从 家 到 少年宫 要 走 9 分钟 ， 小林 家 到 少年宫 有 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11349", "content": "一 本书 有 265 页 ， 小 明 看 了 6 天 后 ， 还 剩下 85 页 ， 小 明 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9832", "content": "一 车 客车 从 甲地 开往 乙地 ， 4 小时 行 320 千米 ， 离 乙地 还有 480 千米 ． 照 这样 计算 ， 这辆 客车 从 甲地 到 乙地 共 需 几小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15561", "content": "小 冬 用 20 元 钱 买 8 千克 西瓜 ， 找回 4 元 ， 每千克 西瓜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "121", "content": "某 车间 要 加工 550 个 机器 零件 ， 已经 工作 了 3.5 h ， 平均 每 小时 加工 52 个 零件 ． 为了 赶任务 ， 剩下 的 要 在 4 h 内 加工 完 ， 平均 每 小时 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20518", "content": "甲 居委会 为 灾区 捐款 2400 元 ， 比 乙 居委会 多 捐 了 20% ， 比 乙 居委会 多 捐款 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21723", "content": "一 车 客车 从 甲地 开往 乙地 ， 速度 是 80 千米 / 时 ， 4 小时 后 离 乙地 还有 480 千米 ． 甲地 到 乙地 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16120", "content": "5 名 工人 6 天 加工 零件 2250 个 ， 照 这样 计算 ， 要 在 相同 的 天数 内 加工 3150 个 零件 ， 需要 增加 多少 名 工人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4545", "content": "修路 队 修 一段 公路 ， 第一周 修 了 6 天 ， 平均 每天 修 100 米 ． 第 二 周 准备 再 修 4 天 完工 ， 平均 每天 修 120 米 ， 这 段 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4261", "content": "一 根 绳子 ， 第一次 用 去 全长 的 (1/3) ， 第 二 次 比 第一次 多用 8 米 ． 还 剩 12 米 ． 这根 绳子 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17774", "content": "用 棱 长 是 1 分 米 的 小 正方体 拼 成长 5 分 米 ， 宽 4 分 米 ， 高 2 分 米 的 长方体 ， 一共 需要 用 这样 的 小 正方体 多少 块 ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13288", "content": "运 一批 货物 ， 甲 车 每 小时 运 这 批 货物 的 (1/5) ， 乙 车 每 小时 运 这 批 货物 的 (2/9) ． 两车 同时 运 2 小时 后 ， 还 剩 这 批 货物 的 几份 之 几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "23060", "content": "(3/4) 箱 苹果 重 12 千克 ， (5/8) 箱 苹果 重 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4800", "content": "四年级 同学 准备 制作 160 个 小 灯笼 庆祝国庆 ， 已经 制作 了 76 个 ， 剩下 的 分给 28 个 同学 去 做 ， 平均 每人 要 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14156", "content": "有 一桶 油 ， 第一次 取出 总数 的 (2/5) 还 多 20 千克 ， 第 二 次 取出 总数 的 (1/4) ， 桶 里 还 剩 22 千克 油 ， 桶 内 原有 多少 千克 油 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19060", "content": "工程队 做 一条 公路 ， 第一周 做 了 全长 的 (1/5) ， 第 二 周 做 了 全长 的 (1/4) ， 两周 共 做 了 180 米 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4564", "content": "一 个 装订 小组 要 装订 2640 本书 ， 3 小时 装订 了 240 本 ． 照 这样 计算 ， 剩下 的 书 还 需要 多少 小时 能 装订 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2250", "content": "一 条 公路 长 10 千米 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 (1/2) 千米 ， 还有 多少 千米 没 修 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12479", "content": "小 李 已经 看 了 一 本书 的 (3/5) ， 正好 是 120 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19067", "content": "看 一 本书 240 页 的 故事书 ， 第一天 看 了 (1/5) ， 第 二 天 看 的 是 第一天 的 (5/8) ， 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "252", "content": "一 本书 共 258 页 ， 小 刚 已经 看 了 142 页 ， 余下 的 要 在 4 天 内 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16545", "content": "把 560 平均 分成 7 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19916", "content": "王 前 楼 中心小学 的 同学 利用 周日 采集 树种 ， 第一周 采集 2.8 千克 ， 第 二 周 采集 比 第一周 的 少 0.13 千克 ， 两周 一共 采集 了 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15410", "content": "妈妈 把 1500 元 钱 存入 银行 一年 ， 年利率 是 2.35% ， 到期 时 可 取回 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6670", "content": "小 明 看 一本 120 页 的 科技 书 ， 如果 再 看 8 页 ， 那么 看过 的 页数 就 相当于 这 本书 的 (2/5) ． 小 明 原来 看过 的 页数 占 全书 页数 的 几分 之 几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15289", "content": "李老师 在 银行 存入 20000 元 ， 存期 3 年 ， 年利率 为 5.40% ， 到期 李老师 一共 可以 取回 多少 元 ？ （ 存款 利息 按 5% 的 税率 纳税 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15472", "content": "2011 年 3 月 21 日 ， 李 阿姨 把 4000 元 存入 银行 ， 整存整取 5 年 ， 年利率 是 5.76% ， 利息 税率 是 5% ， 到期 时 ， 李 阿姨 可 得 税后 利息 和 本金 一共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "7251", "content": "六年级 同学 植树 60 棵 ， 成活率 是 85% ， 没有 成活 的 树 有 多少 棵 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17204", "content": "大桥 乡 修 一条 长 2100 米 的 水渠 ， 已修 了 5 天 ， 平均 每天 修 240 米 ． 余下 的 任务 要 在 3 天 内 完成 ， 平均 每天 应 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17590", "content": "用 一段 圆柱体 木料 削成 一个 最大 的 圆锥 ． 如果 圆锥 的 体积 是 30 dm ^ 3 ， 那么 原来 木料 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19944", "content": "学校 图书室 新 买 了 3 个 书架 ， 每个 书架 5 层 ， 一共 装书 135 本 ． 平均 每层 放 多少 本书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10233", "content": "240 / 60 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15005", "content": "25 * 3 * 4 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17746", "content": "宏 宇 市场 运 来 25 筐 西红柿 和 32 筐 茄子 ， 共 重 1870 千克 ， 西红柿 每 筐 重 30 千克 ， 茄子 每 筐 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4446", "content": "有 两堆 苹果 ， 甲 堆 质量 的 (2/5) 和 乙 堆 质量 的 (3/4) 相等 ， 甲 堆 有 苹果 45 千克 ． 乙 堆 有 苹果 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19476", "content": "少先队 第一 小队 6 人 参加 植树 ， 按计划 平均 每人 要 栽 10 棵 ． 实际 栽树 时 有 1 人 没 来 ， 其他人 仍然 完成 了 小队 计划 ． 这样 实际 平均 每人 多 栽 了 多少 棵 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20981", "content": "超级 女生 小 宇 在 唱歌 比赛 中 ， 有 3 个 评委 给 她 9.08 分 ， 有 4 个 评委 给 她 9.27 分 ， 她 的 总分 = 多少 分 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3295", "content": "甲 、 乙 两 人 同时 从 两地 相向 而 行 ， 相遇 时 乙 比 甲 多行 了 40 米 ， 已知 甲 行 了 全程 45% ， 两地 相距 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21349", "content": "果园 里 有 200 棵 梨树 ， 苹果树 是 梨树 的 3 倍 ， 两种 果树 一共 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3815", "content": "甲 、 乙 两辆 汽车 同时 从 a 、 b 两地 出发 ， 相向 而 行 ， 甲 车 每 时 行 84 千米 ， 乙 车 每 时 行 75.5 千米 ． 一段时间 后 两车 在 途中 相遇 ， 相遇 时 甲 车 比 乙 车 多行 20.4 千米 ， 求 a 、 b 两地 的 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9147", "content": "一 堆 苹果 的 (1/4) 有 5 个 ， 这 堆 苹果 一共 有 多少 个 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8936", "content": "有 含盐 15% 的 盐水 40 千克 ， 要 使 盐水 含盐 20% ， 需要 加入 盐 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14860", "content": "庄 师傅 上午 4 小时 生产 了 252 个 零件 ， 照 这样 的 速度 下午 又 工作 3 小时 ． 庄 师傅 这 一天 共 生产 零件 多少 件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9386", "content": "王 琳 想 买 一本 价格 为 3.85 元 的 书 ， 但是 还 差 1.27 元 ， 结果 她 买 了 一本 1.78 元 的 书 ， 她 还 剩 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4449", "content": "小巧 今年 9 岁 ， 爸爸 的 年龄 是 小巧 的 4 倍 多 2 岁 ， 爸爸 今年 多少岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4086", "content": "小 红 和 小 明 做 同样 的 口 算题 ， 小 红 每分钟 做 60 道口 算题 ， 小 明 每分钟 做 75 道口 算题 ， 当 小 明 做 完 时 ， 小 红 还有 45 道 没有 做 ， 小 明 做 了 几分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19929", "content": "甲 、 乙 、 丙 3 个数 的 平均数 是 12 ， 甲 、 乙 、 丙 的 比 是 2 ： 3 ： 4 ， 丙 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12145", "content": "气象 小组 的 同学 统计 了 若干天 的 平均温度 是 16 度 ， 事后 复查 发现 ， 计算 温度 时 将 某 一天 气温 的 21 度 误 作 12 度 计算 了 ， 经 重新 计算 后 ， 这 几天 的 平均温度 是 19 度 ， 气象 小组 的 同学 统计 了 几天 的 温度 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3969", "content": "在 一个 圆形 喷水池 边 的 一周 共 放 了 20 盆 鲜花 ， 每 两盆 鲜花 之间 相距 8 分 米 ， 求 这个 水池 的 周长 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7743", "content": "96 * 15 / （ 45 * 16 ） = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5055", "content": "某 工程队 修 一段路 ， 第一周 修 全长 的 (1/3) ， 第 二 周 修 全长 的 (1/4) ， 第 3 周 修 完 剩下 的 15 千米 ， 这 段 路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2558", "content": "学校 开 运动会 ， 共有 288 名 运动员 ， 已知 有 6 个 年级 ， 每个 年级 有 2 个 班 ， 平均 每个 班 有 多少 名 运动员 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4347", "content": "小 东 走 一步 的 平均 长度 是 0.58 米 ， 每分钟 走 90 步 ， 照 这样 的 速度 他 从 家 到 少年宫 要 用 15 分钟 ， 他家 到 少年宫 大约 多少 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3109", "content": "1.8 * 1.9 + 0.35 ^ 2 = ．", "knowledge": ["*", "+", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "141", "content": "小 华 家 今年 植树 16 棵 ， 比 去年 少 植 了 4 棵 ， 今年 比 去年 少 植 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8066", "content": "袋子 里 有 大小 相同 的 16 个 黄色 和 白色 的 乒乓球 ， 要 使 摸 到 白色 乒乓球 的 可能性 为 (5/8) ， 袋子 里 应 放 黄色 乒乓球 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10951", "content": "一 支 钢笔 按 0.65 出售 后 ， 便宜 了 4.2 元 ， 这 支 钢笔 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11601", "content": "一 辆 汽车 在 高速公路 上 每 小时 行 112 千米 ， 它 连续 行 12 小时 ， 可以 行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5186", "content": "王老师 今年 元旦 到 银行 存 了 10000 元 ， 定期 1 年 ， 年利率 为 2.25% ． 明年 元旦 他 一共 可 从 银行 取回 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21592", "content": "800 米 跑步 比赛 中 ， 李 刚 前 (1/3) 分钟 跑 了 全程 的 15% ， 他 跑 了 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9106", "content": "完成 一项 工程预算 为 80 万元 ， 后 因 需要 增加 了 预算 的 (1/10) ， 在 施工 中 由于 技术革新 ， 实际 费用 降低 了 (2/5) ． 这项 工程 实际 用 了 多少 万元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "15780", "content": "李 丹 家 去年 收 玉米 300 千克 ， 前年 收 玉米 249 千克 ， 去年 比 前年 的 玉米 增产 了 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11779", "content": "笑笑 家 共有 图书 100 本 ， 其中 75% 是 故事书 ， 其他 是 科技 书 ， 又 买进 一些 科技 书后 ， 科技 书 占 总数 的 40% ， 现在 笑笑 家 共有 多少 本 图书 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13284", "content": "一 根 绳子 长 25 米 ， 剪 去 了 它 的 (2/5) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15260", "content": "一 艘 客轮 从 甲地 开往 乙地 ， 途中 到达 丙 地 时 ， 有 (2/7) 的 旅客 离 船 上岸 ， 又 有 54 人 上船 ， 这时 船上 的 旅客 是 原来 的 (13/14) ， 原来 船上 有 多少 旅客 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16209", "content": "施工队 挖 一条 水渠 ， 已经 挖 的 和 还 没有 挖 的 米 数 的 比 是 1 ： 5 ， 施工队 又 挖 了 200 米 后 ， 乙 挖 的 米 数 是 这 条 水渠 总长度 的 (1/5) ， 这 条 水渠 有 多长 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16308", "content": "红星 小学 上 月 电费 是 480 元 ， 本月 电费 比 上 月 节约 了 (2/5) ． 本月 电费 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4171", "content": "一 个数 是 45 ， 这个 数 的 (2/3) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10490", "content": "一 列 火车 从 北京 出发 ， 开往 青岛 ， 平均 每 小时 行 82 千米 ， 10 小时 到达 ， 两地 相距 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9337", "content": "把 8 千克 苹果 平均 分为 5 个人 ， 每人 分 到 苹果 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16648", "content": "一 条 绳子 长 20 米 ， 剪下 4 米 后 ， 每 2 米 做 一根 跳绳 ， 剩下 的 可以 做 几根 跳绳 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "281", "content": "5 （ 1 ） 班 有 50 个人 ， 其中 23 人 参加 了 “ 育苗 杯 ” 数学 竞赛 ， 参加 比赛 的 人数 占 全班 的 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5840", "content": "一 桶 油 重 45 千克 ， 第一次 用 去 它 的 (2/9) ， 第 二 次 用 去 它 的 (1/5) ， 两次 共用 去 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18158", "content": "滨江 花园 小区 共 住 有 246 户 居民 ， 如果 小区 每户 每月 收 75 元 的 物业 管理费 ， 该 小区 每月 应收 多少 元 物业 管理费 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21690", "content": "科技 展览馆 每天 上午 展出 的 时间 是 8 时 - 11 时 ， 上午 展出 的 时间 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8110", "content": "从 甲 城 到 乙 城 的 公路 长 360 千米 ． 一辆 汽车 走 高速路 的 速度 是 90 千米 / 时 ， 走 普通 公路 的 速度 是 60 千米 / 时 ． 从 甲 城 去 乙 城 走 高速路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13934", "content": "把 含盐 率 为 22% 的 盐水 500 克 和 含盐 率 为 10% 的 盐水 300 克 混合 ， 混合 后 盐 水溶液 的 含盐 率 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12625", "content": "一 次 数学 竞赛 有 20 道 题 ， 兰兰 做 对 了 (4/5) ， 晶晶 做 对 的 题 数 是 兰兰 的 87.5% ． 晶晶 做 对 几道 题 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7867", "content": "一 件 商品 打 0.8 后 售价 400 元 ， 这件 商品 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2697", "content": "卓越 网 图书 打折 促销 ， 彤 彤 想 买 的 《 轰隆隆 老师 》 折 后 价 是 11.10 元 ， 《 会 唱歌 的 猫 》 的 价格比 《 轰隆隆 老师 》 的 多 1.80 元 ． 彤 彤 的 卓越 储值卡 里 原来 有 50 元 ， 买 这 两本书 后 还 剩 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21274", "content": "修路 队 要 修 一条 长 400 米 的 公路 ， 已经 修 了 8 天 ， 还 剩 80 米 ． 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5283", "content": "每张 电脑桌 130 元 ， 学校 一共 买 了 33 张 ， 已经 付 了 805 元 钱 ， 还 应 再 付 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13274", "content": "在 一条 长 40 米 的 马路 的 一边 ， 从头到尾 每隔 5 米 种 一棵树 ， 一共 可以 种 多少 棵 树 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5374", "content": "学校 计划 十 月份 用 煤 (4/5) 吨 ， 实际 比 计划 节约 了 (1/8) ． 实际 用 煤 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3080", "content": "一 台 电视机 0.7 售 的 价钱 是 2100 元 ， 这 台 电视机 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "613", "content": "小 明 在 计算 一道 除法 计算 时 ， 错 把 除数 63 看成 了 36 ， 于是 他 得出 错误 的 结果 是 14 ， 那么 这 道 题 的 正确 结果 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21576", "content": "水果店 进来 桃子 90 箱 ， 每箱 净重 25 千克 ， 如果 每千克 桃子 卖 4 元 ， 这些 桃子 可以 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7857", "content": "仓库 里 有 180 吨 化肥 ， 3 天 运走 了 (5/12) ， 平均 每天 运走 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3597", "content": "小 华 上学 步行 的 速度 是 76 米 / 分 ， 他 每天 上学 要 走 20 分钟 ， 他 的 家 离 学校 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20589", "content": "用 一根 长 109.9 米 的 绳子 正好 围绕 树干 10 周 ， 求 横截面 的 直径 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "398", "content": "农具厂 计划 生产 一批 农具 ， 已经 生产 了 240 件 ， 还 剩 660 件 ， 还 剩 计划 的 几分 之 几 没有 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16003", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 (7/10) ， 正好 行 了 56 千米 ． 这时 ， 这辆 汽车 离 乙地 还有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23075", "content": "小巧 计划 用 12 天 看 完 一 本书 ， 实际 每天 看 了 18 页 ， 只用 了 10 天 就 看 完 了 ， 实际 比 计划 每天 多 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20359", "content": "一 朵 玫瑰花 9 元 ， 小 敏 买 12 朵 ， 需要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10336", "content": " 计算 ：  19961997 * 19971996 - 19961996 * 19971997 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9669", "content": "学校 音乐教室 共有 108 个 座位 ， 图书馆 的 座位 是 音乐教室 座位数 的 15 倍 ． 学校 图书馆 共有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10698", "content": "有 煤 1500 吨 ， 用 一列 有 30 节 同样 大 的 车厢 的 火车 运走 一批 煤 后 ， 还 剩 150 吨 ， 每 节车厢 装 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21316", "content": "课堂 上 学生 做 实验 用 (1/5) 小时 ， 老师 讲解 用 0.3 小时 ， 其余 的 时间 学生 独立 做作业 ． 已知 每 堂 课 是 (2/3) 小时 ， 学生 做作业 用 了 多少 时间 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20582", "content": "王 叔叔 看中 一套 运动装 ， 标价 1200 元 ， 经过 还价 ， 打 0.85 买 到 ， 王 叔叔 实际 付 了 多少 元 买 了 这 套 运动装 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13086", "content": "小 明 看 一 本书 ， 已经 看 了 全书 的 (3/7) ， 没有 看 的 比 已经 看 的 多 全书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13897", "content": "修 一条 水渠 ， 原 计划 每天 修 12.3 千米 ， 实际 每天 比 原 计划 多 修 0.14 米 ， 修 了 7 天 ， 还 差 2.16 米 没 修 ， 这 条 水渠 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20403", "content": "每个 书架 有 6 层 ， 平均 每层 125 本 ， 共 8 个 书架 ， 这个 图书室 一共 有 （ 多少 ） 本书 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14376", "content": "有 一种 浓度 为 25% 的 农药 200 千克 ， 为了 得到 浓度 为 10% 的 农药 ， 需 加水 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21407", "content": "小 荣 今年 9 岁 ， 妈妈 今年 37 岁 ， 10 年 之后 ， 妈妈 比 小 荣 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8782", "content": "某班 有 女生 20 人 ． 女生 比 男生 少 20% ， 女生 比 男生 少 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8323", "content": "黄 村 修 水渠 ， 已经 修 了 480 米 ， 剩下 的 比 已修 的 2 倍 少 96 米 ． 这 条 水渠 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17512", "content": "王 阿姨 把 30000 元 钱 存入 银行 ， 整存整取 5 年 ， 年利率 为 3.6% ， 到期 时 王 阿姨 可以 获得 多少 利息 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11465", "content": "5 （ 1 ） 班 15 名 同学 收集 废电池 ， 一天 共 收集 废电池 19 节 ， 这 一天 平均 每人 收集 多少 节 ？ （ 用 带分数 表示 结果 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9328", "content": "一 辆 汽车 从 a 地 去 b 地 ， 去 时 下坡 多 ， 平均 每 小时 行驶 80 千米 ， 用 了 6 小时 ； 返回 时 ， 上坡 多 ， 用 了 8 小时 才 到达 ， 返回 时 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10728", "content": "76.25 / 3.05 的 商 减去 1.4 * 6.5 的 积 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6103", "content": "小牛 和 小狗 比赛 跳绳 ， 小牛 一次 跳 24 下 ， 小狗 跳 的 是 小牛 的 3 倍 ， 问 小牛 一次 比 小狗 少 跳 多少 下 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12754", "content": "一 条 路 长 2800 米 ， 从 起点 到 终点 ， 每 50 米 立 一根 电线杆 ， 一共 要 立 多少 根 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13662", "content": "一 种 服装 降价 (2/5) 后 ， 售价 为 120 元 ， 这种 服装 原价 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "658", "content": "南 莫 缫丝厂 前年 用 煤 23.02 吨 ， 去年 比 前年 节约 用 煤 0.78 吨 ， 今年 估计 要 比 前年 节约 用 煤 1.2 吨 ， 今年 估计 用 煤 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2315", "content": "学校 买 了 蓝球 、 排球 各 5 个 ， 买 篮球 用 去 245 元 ， 买 排球 用 去 115 元 ， 一个 篮球 比 一个 排球 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12526", "content": "甲 、 乙 两地 相距 1960 千米 ， 一辆 汽车 从 甲地 到 乙地 ， 25 时 后 距 乙地 还有 360 千米 ． 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12454", "content": "有 一批 水泥 ， 第一天 运走 40 吨 ， 第 二 天 运走 42 吨 ， 这时 剩下 的 水泥 和 运走 的 水泥 的 比 是 3 ： 2 ， 这 批 水泥 共有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11261", "content": "33333 / 66666 的 结果 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10891", "content": "一 段 木料 ， 锯 成 3 段 需要 12 分钟 ， 照 这样 计算 ， 如果 把 木料 锯 成 6 段 ， 需要 几分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17998", "content": "小 南 看 一本 侦探小说 ， 第一天 看 了 全书 的 25% 还 多 10 页 ， 第 二 天 看 了 全书 的 40% 少 8 页 ， 这时 还 剩 26 页 ， 这 本书 一共 有 多少 页 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10272", "content": "修 一条 公路 ， 第一天 修 了 全长 20% ， 第 二 天 修 了 全长 的 35% ， 两天 一共 修 了 5500 米 ， 这 条 公路 一共 有 多长 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3091", "content": "客车 和 货车 同时 从 相距 630 千米 的 两地 出发 ， 相向 而 行 ， 经 6 小时 相遇 ． 已知 客车 每 小时 行 48 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15445", "content": "8 一 小学 5 （ 1 ） 班 有 学生 64 人 ， 其中 女 学生 有 30 人 ， 男女 学生 各 占 全班学生 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1143", "content": "甲 仓库 有 化肥 120 吨 ， 乙 仓库 比 甲 仓库 多 20% ， 两个 仓库 共有 化肥 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14411", "content": "饲养 小组 养鸭 76 只 ， 是 养鸡 只 数 的 4 倍 ， 饲养 小组 养鸡 和 鸭 共 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18184", "content": "一 本 童话故事 书 ， 每天 看 24 页 ， 15 天 看 完 ， 如果 每天 看 30 页 ， 需 几天 看 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12979", "content": "万家 福 超市 进 了 一批 金龙鱼 油 ， 第一天 卖 了 (2/3) ， 第 二 天 把 剩下 的 15 桶 全部 卖完 ， 这 批 金龙鱼 油 共有 多少 桶 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19862", "content": "要 配制 60 克 含盐 率 20% 的 盐水 需要 多少 克 盐 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9937", "content": "比 5100 少 2895 的 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18378", "content": "有 图书 180 册 ， 按 4 ： 5 分给 一班 和 二 班 ， 两班 相差 多少 册 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12900", "content": "一 台 拖拉机 耕 一片 地 ， 耕 了 总面积 的 65% ， 还 剩下 28 公顷 没 耕 完 ， 这 片 地 一共 有 多少 公顷 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10332", "content": "刘阿姨 购进 100 条 同样 的 裤子 ， 卖出 的 价格比 购进 价 贵 (1/5) ， 结果 赚 了 500 元 ， 这 批 裤子 的 购进 时 每 条 价格 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "483", "content": "东方 水果店 有 水果 670 千克 ． 今天上午 卖出 120 千克 ， 下午 又 卖出 230 千克 ， 这时 商店 还有 水果 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9533", "content": "商场 上 有 一批 货 ， 第一天 运走 了 总数 的 (1/2) ， 第 二 天运 的 比 总数 的 (1/3) 多 4 吨 ， 这时 还 剩 20 吨 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12446", "content": "5 米 长 的 绳子 ， 平均 截 成 7 段 ， 每 段长 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18571", "content": "学生 参加 搬 砖 劳动 ， 6 人 搬 砖 162 块 ， 照 这样 计算 ， 再 增加 432 块 ， 需要 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7790", "content": "1976 年 ， 我国 收集 到 了 一块 陨石 重 1770 千克 ， 而 这 以前 ， 美国 的 一块 号称 “ 世界之最 ” 的 陨石 比 我国 的 这块 陨石 质量 少 39% ． 美国 的 号称 “ 世界之最 ” 的 陨石 重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18859", "content": "育 丰 小学 三年级 6 个 班 的 同学 参加 迎 奥运 圣火 活动 ， 每个 班 有 20 个 同学 ， 每个 同学 需要 2 个 气球 ， 一共 需要 多少 个 气球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17111", "content": "一 条 绳子 ， 剪 去 全长 的 (4/5) ， 刚好 是 (1/4) 米 ， 这 条 绳子 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7608", "content": "一 个数 是 120 ， 它 的 30% = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17404", "content": "用 魔术 拖把 2 分钟 飞行 了 580 米 ， 从 狼 堡 到 羊 村 还有 3480 米 ， 它 还要 飞行 几分钟 才能 到 羊 村 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16340", "content": "某 厂 今天 出勤率 是 99.2% ， 3 人 缺勤 ， 这个 厂 今天 出勤 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19352", "content": "汽车 的 速度 是 35 千米 / 时 ， 一列 火车 的 速度 比 汽车 多 30 千米 / 时 ， 飞机 的 速度 是 火车 的 4 倍 ， 这 架飞机 的 速度 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1526", "content": "3 个 小组 栽树 ， 每个 小组 有 12 人 ， 每人 栽 8 棵 ， 一共 栽 了 多少 棵 树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18392", "content": "2.85 要 加上 多少 才能 等于 3 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18964", "content": "某 制衣厂 有 女工 273 人 ， 男工 91 人 ． 这个 厂 的 女工 人数 是 男工 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4435", "content": "甲 、 乙 、 丙 3 人 共 修 一段路 ， 甲 一天 修 了 (1/5) 千米 ， 乙 一天 修 的 比 甲 多 (1/10) ， 丙 一天 修 的 比 甲 少 (1/20) 千米 ， 丙 一天 修 多少 千米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2373", "content": "粮店 运进 930 千克 大米 ， 第一天 卖 了 260 千克 ， 第 二 天 卖 了 340 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9237", "content": "修 一条 36 千米 的 公路 ， 已经 修 了 27 千米 ， 这 条 路 还 剩下 百分之几 没 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3278", "content": "姚明 的 身高 是 2.26 米 ， 他 的 身高 比 小 光 的 身高 的 2 倍 还 多 0.06 米 ， 小 光 的 身高 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7155", "content": "五年级 数学 竞赛 共 20 道 题 ， 规定 做 对 一 题 得 5 分 ， 做 错 一 题 倒扣 3 分 ， 王明 在 这次 竞赛 中 得 了 84 分 ， 他 做 错 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14258", "content": "李 铃 瑞 和 黄 凯 鹏 同 住 一层楼 ． 上学时 ， 李 铃 瑞 每分钟 走 90 米 ， 8 分钟 到达 学校 ， 黄 凯 鹏 多用 1 分钟 ， 黄 凯 鹏 每分钟 走 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23028", "content": "玩具厂 生产 一批 玩具 ， 计划 每天 生产 36 件 ， 12 天 完成 ， 这 批 玩具 一共 有 多少 件 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18548", "content": "一 段 路 ， 小 明 每 小时 走 完 它 的 (3/10) ， 多少 小时 可以 走 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13549", "content": "王 林 原来 有 10 元 ， 给 妹妹 3.4 元 后 ， 妹妹 还 比 他 少 0.34 元 ， 现在 妹妹 有 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "683", "content": "甲乙 两班 共有 90 人 ， 甲班 人数 是 乙班 人数 的 (4/5) ， 乙班 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3011", "content": "4 吨 的 (1/5) 与 多少 的 (4/5) 是 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8192", "content": "一 个 小组 在 一班 工作 时间 内 ， 前 3 小时 每 小时 生产 零件 170 个 ， 后 5 小时 每 小时 生产 零件 186 个 ， 平均 每 小时 生产 零件 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16630", "content": "小 红 课外书 的 册数 是 小 明 的 (4/5) ， 如果 小 明 给 小 红 4 本 ， 那么 两 人 的 数 同样 多 ． 小 红 原有 多少 本书 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17573", "content": "一 架飞机 4 小时 飞行 2800 千米 ， 一列 火车 7 小时 行 490 千米 ， 飞机 的 速度 是 火车 速度 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22737", "content": "水果店 上午 卖出 苹果 (11/18) 吨 ， 下午 比 上午 多 卖出 (1/24) 吨 ， 一天 共 卖出 苹果 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22475", "content": "李 红 有 22 本 故事书 ， 比 王 玲 少 7 本 ． 李 红 和 王 玲 共有 多少 本 故事书 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17478", "content": "某 工程队 修 一条 公路 ． 原 计划 每天 修 45 米 ， 24 天 完成 任务 ． 实际上 用 了 20 天 就 修 完 了 ， 实际 每天 比 原 计划 每天 多 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9358", "content": "学校 共有 102 名 教师 ， 其中 男 教师 占 全校 老师 人数 的 (1/3) ， 女 教师 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16818", "content": "两个 因数 的 积 是 13.2 ， 一个 因数 是 1.1 ， 则 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16252", "content": "（ 3.4 * 4.8 * 9.5 ） / （ 1.9 * 1.7 * 2.4 ） = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14626", "content": "学校 买来 9 箱 图书 ， 每箱 80 本 ， 平均 分给 5 个 年级 ， 每个 年级 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11890", "content": "果园 里 有 240 棵 桃树 ， 梨树 比 桃树 多 20% ， 梨树 是 苹果树 的 (3/4) ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1427", "content": "小 红 和 小 明 同时 从 校园 骑车 出发 去 植物园 ． 小 红 每 小时 行 10 千米 ， 小 明 每 小时 行 14 千米 ． 3 小时 后 ， 小 红 和 小 明 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8165", "content": "某 车间 有 女 工人 54 人 ， 正好 占 全 车间 工人 数 的 60% ． 这个 车间 有 工人 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7441", "content": "学校 有 故事书 127 本 ， 科技 书 138 本 ， 现在 把 这些 书 平均 分给 三年级 5 个 班 ， 每班 分 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12783", "content": "宁波 至 上海 的 公路 长 360 千米 ， 甲 、 乙 两辆 汽车 分别 从 宁波 和 上海 同时 出发 相向 而 行 ， 经过 1.8 小时 后 相遇 ， 已知 甲 车 的 速度 是 每 小时 105 千米 ， 求 乙 车 的 速度 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6908", "content": "5 米 长 的 铁丝 ， 第一次 用 去 总长度 的 20% ， 第 二 次 用 去 (1/2) 米 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16229", "content": "五年级 共有 40 位 同学 参加 体操 训练 ， 其中 男生 占 了 (2/5) ， 有 多少 名 男生 参加 了 体操 训练 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "930", "content": "在 一次 测试 中 ， 数学 小组 的 6 个人 中 ， 有 2 人 85 分 ， 有 3 人 90 分 ， 有 1 人 94 分 ， 则 该 数学 小组 成员 人均 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16464", "content": "数学课 上 ， 李老师 布置 了 两道 题 ， 结果 有 34 人 答对 了 第一 题 ； 有 46 人 做 对 了 第 二 题 ； 没有 人 两道 题 全部 做 错 ． 如果 这个 班 共有 52 人 ， 那么 两道 题 都 做 对 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8144", "content": "李家 村 去年 种 油菜 30 公顷 ， 今年 的 种植 面积 比 去年 多 (1/6) ， 今年 种植 油菜 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2248", "content": "一 段 木料 ， 锯 4 段 需 6 分钟 ， 如果 锯 5 段 需 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1250", "content": "水果 店里 橘子 的 重量 是 梨 的 6 倍 ， 是 苹果 的 2 倍 ． 已知 梨 有 4 筐 ， 每 筐 重 50 千克 ， 苹果 有 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1162", "content": "比 的 后 项 是 3.2 ， 比值 是 8 ， 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15153", "content": "一 个 锅 里 一次 只能 烙 两张 肉饼 ， 每 面 2 分钟 ， 小 军 一家 4 口 人 每人 一张 ， 至少 要 用 多少 分钟 才能 吃 上 肉饼 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16113", "content": "一 列 火车 的 速度 是 每 小时 110 千米 ， 提速 后 比 原来 快 (3/11) ， 火车 提速 后 每 小时 行 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6085", "content": "体育组 易 老师 买 了 4 个 足球 用 去 92 元 ， 他 还 想 再 买 5 个 这样 的 足球 ， 还 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3162", "content": "从 甲地 到 乙地 ， 第一天 行驶 了 全程 的 (1/5) ， 第 二 天 行驶 了 剩下 路程 的 (1/3) ， 还 剩下 300 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19155", "content": "服装厂 原 计划 做一套 服装 用布 2.25 米 ， 现在 改进 技术 后 ， 每套 节约 用布 0.15 米 ， 原来 做 1400 套 服装 的 布料 ， 现在 可以 多 做 几套 服装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10762", "content": "一 本书 96 页 ， 苗苗 看 了 这 本书 的 (1/3) 少 15 页 ， 看 了 多少 页 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11490", "content": "一 根 绳子 的 (3/4) 是 12 米 ， 这根 绳子 的 (1/8) = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15907", "content": "一 个数 的 (1/3) 是 15 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9963", "content": "在 庆祝 中国共产党 建党 90 周年 的 “ 唱红 歌 ” 比赛 中 ， 教师 合唱队 有 150 人 ， 比 工人 合唱队 的 人数 多 (1/4) ， 工人 合唱队 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5375", "content": "把 一根 木头 锯 成 5 段 要 10 分钟 ， 照 这样 的 速度 ， 把 这根 木头 锯 成 6 段 ， 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3145", "content": "学校 美术 小组 有 24 人 ， 是 航模 小组 人数 的 (4/5) ， 科技 小组 是 航模 小组 的 (3/5) ． 科技 小组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4953", "content": "亮 亮 到 食堂 里 去 买 饭菜 ， 食堂 里 共有 3 种 素菜 ， 2 种 荤菜 ， 一种 汤 ， 她 要 各 买 一样 ， 共有 多少 种 不同 的 买 法 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19619", "content": "在 育才 小学 举办 的 运动会 上 ， 有 (1/3) 的 学生 参加 了 径赛 项目 比赛 ， 有 (1/6) 的 学生 参加 了 田赛 项目 比赛 ， 其余 的 学生 参加 了 团体操 的 比赛 ， 参加 团体操 比赛 的 学生 占 全校学生 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7863", "content": "一 辆 汽车 从 甲地 去 乙地 每 小时 行 40 千米 ， 返回 时 每 小时 快 10 千米 ， 速度 提高 了 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17961", "content": "比 一个 数 的 80% 多 9 的 数 是 10 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5016", "content": "小 娟 的 爸爸 每月 工资收入 1800 元 ， 他 把 其中 的 (1/6) 储蓄 ， 小 娟 的 爸爸 每月 储蓄 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15458", "content": "同学 们 订 《 小学生 数学 报 》 和 《 小学生 语文报 》 ． 3 （ 1 ） 班 有 40 人 ， 全班 都 订 了 报 ． 订 《 小学生 数学 报 》 的 有 38 人 ， 订 《 小学生 语文报 》 的 有 26 人 ． 订 《 小学生 语文报 》 和 《 小学生 数学 报 》 共有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4068", "content": "京城 拖拉机厂 要 生产 1070 台 拖拉机 ， 已经 生产 了 7 天 ， 平均 每天 生产 85 台 ， 剩下 的 要 5 天 完成 ． 平均 每天 要 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6354", "content": "建筑工地 需要 黄沙 47 吨 ， 用 一辆 载重 4.5 吨 的 汽车 运 6 次 ， 余下 的 改用 一辆 载重 2.5 吨 的 汽车 运 ， 还要 运 多少 次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6777", "content": "153 + 64 / 4 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 最后 结果 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16500", "content": "水果店 运 来 苹果 、 梨 各 9 箱 ， 苹果 每箱 28 千克 ， 梨 每箱 32 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6793", "content": "双休日 ， 亮 亮 在家 帮 妈妈 做 家务 ， 烧 开水 22 分钟 ， 整理 书柜 8 分钟 ， 拖地 10 分钟 ， 洗 茶杯 4 分钟 ， 倒 开水 3 分钟 ， 亮 亮 做 这些 事 至少 要 几分钟 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5076", "content": "16.8 与 1.5 的 积 减去 5.2 后 ， 再 除 4 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15075", "content": "即将 全部 建成 通车 的 宁 启 铁路 ， 是 我市 的 首条 铁路 ， 它 的 一期 工程 （ 南京 到 海安 ） 全长 210 千米 ， 项目 总 投资 32.9 亿元 ， 其中 泰州市 境内 长 43 千米 ． 泰州 境内 的 工程量 约 占 总 工程 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9752", "content": "一 本 故事书 ， 我 每天 看 5 页 ， 看 了 7 天 ， 还 剩 65 页 ， 这 本书 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3420", "content": "一 批 货物 分 两次 运 完 ， 第一次 运 了 (1/4) 多 16 吨 ， 第 二 次 运 了 23 吨 ． 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14330", "content": "小 明 读 一 本书 ， 第一天 读 了 全书 的 (1/3) ， 第 二 天 读 了 全书 的 (1/2) ， 第 3 天 读 了 30 页 ， 把 这 本书 读完 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20806", "content": "一 个 圆形 的 周长 是 12.56 厘米 ， 可以 在 这个 圆 里 画 一条 最长 的 线段 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21073", "content": "用 橡皮泥 做 圆柱体 学 具 ， 第一次 做 的 高 是 15 厘米 ， 底 面积 是 3.2 平方厘米 需 一块 橡皮泥 做 ， 高 是 8 厘米 ， 底 面积 = 多少 平方厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5017", "content": "如果 甲 车 比 乙 车 多 运货 25% ， 也 就是 乙 车 比 甲 车 少 运货 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19378", "content": "一 只 文具盒 售价 8.5 元 ， 一只 书包 的 售价 比 文具盒 的 7 倍 少 1.5 元 ， 一只 书包 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1108", "content": "三年级 同学 参加 春游 活动 ， 女同学 有 138 人 ， 男同学 有 144 人 ， 每 6 位 同学 编 一组 ， 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13075", "content": "一 列 火车 从 甲地 开往 乙地 ， 前 3 小时 行 了 415 千米 ， 后来 每 小时 150 千米 的 速度 行 了 4 小时 ， 到达 了 乙地 ， 求 这辆 车 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8261", "content": "育 民 小学 三年级 有 140 个 同学 参观 自然 博物馆 展览 ， 每 20 个 同学 编成 一队 ， 可以 编成 几队 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19130", "content": "回收站 回收 的 易拉罐 和 饮料瓶 的 单价 一样 ， 15 个 易拉罐 ， 24 个 饮料瓶 ， 一共 是 3.9 元 ． 每个 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15955", "content": "鸵鸟 是 世界 上 最大 的 鸟 ， 它 奔跑 的 速度 可 达 72 km / 时 ， 比 野兔 的 2 倍 少 12 km ， 野兔 的 奔跑 速度 可 达 每 小时 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22605", "content": "学校 礼堂 每排 有 30 个 座位 ， 楼下 共有 22 排 ， 楼上 有 360 个 座位 ． 学校 礼堂 共有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13407", "content": "梨 的 筐 数 是 苹果 的 (3/4) ， 又 是 橘子 的 (4/5) ， 苹果 有 80 筐 ， 橘子 多少 筐 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4797", "content": "一 支 修路 队 要 修 300 千米 的 路 ， 第一天 修 了 63 千米 ， 第 二 天 修 了 86 千米 ， 还 剩 多少 千米 路 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18977", "content": "把 甲 筐 苹果 的 (1/5) 放入 乙 筐 ， 这时 ， 两筐 苹果 的 重量 相等 ， 原来 乙 筐 水果 是 甲 筐 水果 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2741", "content": "小强 看 一本 故事书 ， 每天 看 20 页 ， 5 天 后 还 剩下 全书 的 (1/5) 没 看 ， 这本 故事书 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14312", "content": "一 个数 的 (2/3) + (3/4) 的 和 是 1 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2025", "content": "六年级 有 18 人 参加 合唱队 ， 占 全年 级 的 (1/3) ， 参加 体育 队 的 人数 占 全年 级 的 (2/9) ， 参加 同 体育 队 的 同学 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18278", "content": "客车 每 小时 行驶 70 千米 ， 比 货车 的 速度 快 (1/6) ． 客车 每 小时 比 货车 快 多少 千米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2076", "content": "912 / 19 与 3 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17260", "content": "送 货车 给 惠 家 超市 送来 10 箱 罐装 啤酒 和 5 箱 可口可乐 ， 每箱 都 是 24 听 ． 如果 每 听 啤酒 和 每 听 可口可乐 都 卖 3 元 ， 这些 饮料 可以 卖 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10699", "content": "一 筐 香瓜 ， 第一次 卖出 全部 的 50% ， 第 2 次 卖出 的 是 第一次 卖出 数量 的 (3/5) ， 还 剩 这 筐 香瓜 的 几分 之 几 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "593", "content": "将 一根 长 2.8 米 的 竹竿 插入 池 中 ， (1/7) 露出 水面 ， 剩余 竹竿 的 (1/4) 插 在 泥 里 ， 问 池 深 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "12533", "content": "学校 图书馆 有 文艺 书 709 本 ， 文艺 书 比 科技 书 少 300 本 ， 故事书 的 本 数 是 科技 书 的 4 倍 ． 学校 图书馆 有 故事书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11335", "content": "学校 买 100 套 课桌椅 ， 已知 每张 桌子 78.5 元 ， 每 把 椅子 25.8 元 ， 共 应付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14169", "content": "小 明 家 8 月份 的 支出 中 ， 房租 占 全 月 的 (1/6) ， 用于 餐饮 、 水果 方面 的 支出 约 占 (1/4) ． 这 两样 支出 约 占 总支出 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "599", "content": "一 所 小学 去年 植树 50 棵 ， 成活率 是 98% ， 植 的 树 活 了 多少 棵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8278", "content": "某 商场 某月 下半月 的 营业额 是 480 万元 ， 比 上 半月 增加 了 (1/4) ， 上 半月 的 营业额 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7027", "content": "某 矿场 去年 4 个 季度 分别 完成 全年 计划 的 (1/4) 、 (1/6) 、 (3/8) 、 (1/3) ， 超额完成 全年 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18369", "content": "56 里面 有 多少 个 7 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16893", "content": "列式 计算 ． 用 (3/5) - (3/20) 的 差 除以 12.5 与 0.8 的 积 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "223", "content": "用 一个 数 去除 936 ， 等于 26 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3807", "content": "建设 乡 今年 植树 600 万棵 ， 比 去年 增加 了 20% ， 去年 植树 多少 万棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "976", "content": "李 丽 看 一本 漫画书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 全书 的 (1/2) ， 正好 是 60 页 ． 第一天 看 了 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15625", "content": "少年宫 招收 书法 班 学生 ， 已经 录取 男生 16 人 ， 女生 24 人 ， 还要 录取 多少 名 男生 ， 才能 使 男生 人数 占 总 人数 的 60% ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20961", "content": "同学 们 表演 团体操 ， 原来 排成 24 行 ， 每行 20 人 ． 队形 变化 后 ， 排成 30 行 ， 每行 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "173", "content": "一 块 蛋糕 ， 吃 了 (1/5) ， 还 剩 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18786", "content": "一 个 比 的 前项 是 16 ， 比值 是 (2/3) ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8853", "content": "小 红 家 根据 国家 规定 农民 购买 家用电器 可 获得 15% 的 优惠政策 ， 买 了 一台 电视机 850 元 ， 这 台 电视机 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19969", "content": "南山 果园 有 桃树 1500 棵 ， 比 梨树 的 棵 数多 20% ， 梨树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10257", "content": "某 山区 去年 有 电视机 420 台 ， 今年 比 去年 增加 45% ， 今年 有 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5502", "content": "工厂 要 加工 塑料 封皮 6799 个 ， 前 8 天 加工 4184 个 ， 照 这样 计算 ， 剩下 的 要 加工 多少 天 才能 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9281", "content": "压路机 的 滚筒 是 一个 圆柱形 ， 滚筒 的 直径 是 1.2 米 ， 长 1.5 米 ． 如果 向前 滚动 20 周 ， 所 压 路面 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "16900", "content": "甲 、 乙 两 数 的 和 是 120 ， 甲 、 乙 两 数 的 比 是 2 ： 3 ， 甲 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18850", "content": "学校 订 了 24 箱 牛奶 ， 每箱 4 盒 ， 每盒 15 袋 ， 全校 一共 订 了 多少 袋 牛奶 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10606", "content": "从 2100 里 “ 减去 50 ， 再 加上 20 ” ， 这 称作 一次 操作 ， 经过 多少 次 操作 ， 所得 的 结果 是 0 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9274", "content": "一 道 除法 算式 除数 是 38 ， 商 是 21 ， 余数 是 15 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "759", "content": "a 、 b 两站 相距 840 千米 ， 两列 火车 分别 从 两站 相对 开出 ， 8 小时 后 相遇 ． 甲 车 的 速度 是 每 小时 52 千米 ， 乙 车 的 速度 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11473", "content": "甲乙 两列 火车 分别 从 两个 车站 同时 相向 开出 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 52 千米 ， 如果 相遇 时 ， 甲 车 一共 比 乙 车 少 行 20 千米 ， 那么 两站 之间 的 距离 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15371", "content": "把 5 克 盐 放入 100 克 水中 ， 盐 占 盐水 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19473", "content": "一 个 长方体 的 水池 ， 长 10 米 ， 宽 5 米 ， 深 3 米 ， 如果 每 小时 可以 放进 7.5 立方米 ， 要 放满 这 一 池水 需要 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2631", "content": "修 一条 长 1800 m 的 路 ， 工人 叔叔 8 天 修 了 (2/5) ． 以 这样 的 速度 ， 他们 修 完 剩下 的 路 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9476", "content": "服装厂 要 加工 8000 套 服装 ， 已经 加工 了 4500 套 ， 剩下 的 要 5 天 加工 完 ， 平均 每天 要 加工 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7717", "content": "女生 有 9 人 ， 男生 是 女生 的 2 倍 ， 男生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14820", "content": "园林绿化 公司 去年 植树 2.4 万棵 ， 今年 植树 3 万棵 ． 今年 比 去年 多 植树 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13561", "content": "一 条 路 长 100 米 ， 在 这 条 路 的 一旁 从头到尾 每隔 5 米 插 一面 彩旗 ， 一共 要 插 多少 面 彩旗 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11419", "content": "晨光 电影院 有 9 个 放映室 ， 前 8 个 放映室 各 有 117 个 座位 ， 第 9 个 放映室 有 120 个 座位 ， 晨光 电影院 一共 可以 坐 多少 个 观众 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4898", "content": "车队 向 灾区 运送 一批 救灾物资 ， 去 时 每 小时 行 80 km ， 5 小时 到达 灾区 ． 回来 时 每 小时 行 100 km ， 这 支 车队 要 多长时间 能够 返回 出发地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13323", "content": "一 块 长方形 草地 的 长 是 456 米 ， 宽 是 38 米 ， 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3252", "content": "一 本书 有 120 页 ， 小 军 已 看 了 (3/4) ， 还有 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6607", "content": "两个 数 的 和 是 870 ， 其中 一个 加数 是 471 ， 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22896", "content": "化肥厂 计划 7 天 生产 化肥 1379 吨 ． 实际 每天 生产 化肥 214 吨 ， 实际 每天 比 计划 多 生产 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15212", "content": "一 个 长方体 ， 长 5 厘米 ， 宽 3 厘米 ， 高 4 厘米 ． 它 的 表面积 = 多少 厘米 ^ 2 ．", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "9960", "content": "一 个 压路机 的 前轮 是 圆柱形 ， 轮 宽 是 2 米 ， 直径 是 1.2 米 ， 前轮 想 前 滚动 100 周 ， 压路 得 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6868", "content": "甲 数 的 80% 是 乙 数 ， 乙 数 的 20% 是 16 ， 甲 数 = ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20377", "content": "一 个 工程队 修 一条 水渠 ， 4 天 修 了 1800 米 ． 照 这样 计算 ， 再 修 3 天 才能 修 完 ． 这 条 水渠 长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5933", "content": "在 一根 绳子 上 每隔 2 米 挂 一个 灯笼 起点 和 终点 都 不 挂 ， 一共 挂 了 12 个 灯笼 ， 这根 绳子 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19055", "content": "一 个数 的 50% 比 4.38 少 0.62 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "103", "content": "工程队 要 修 一条 长 250 千米 的 公路 ， 前 3 天 每天 修 30 千米 ， 剩下 的 如果 每天 修 40 千米 ， 还要 几天 才能 修 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10727", "content": "《 童话世界 》 一共 有 98 页 ， 小 丽 已经 看 了 18 页 ， 她 要 用 5 天 时间 把 剩下 的 看 完 ， 小 丽 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21329", "content": "养鸡场 今年 养鸡 2.3 万 只 ， 卖掉 0.7 万 只 后 ， 还 比 去年 多 0.3 万 只 ， 养鸡场 去年 养鸡 多少 只 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13318", "content": "小 明 家 有 一个 长方体 的 鱼缸 ， 鱼缸 的 底 是 长 为 100 厘米 ， 宽 为 40 厘米 的 长方形 ， 里面 放置 一块 棱 长 为 10 厘米 的 正方体 石块 ， 向 鱼缸 里 加水 ， 使 水面 没 过 石块 ． 如果 将 石块 取出 ， 那么 水面 降低 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "162", "content": "1092 - 389 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3889", "content": "小 明 的 妈妈 2 小时 做 了 5 件 衣服 ， 做 一件 衣服 用 多少 小时 ． （ 填 分数 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5737", "content": "学校 体操队 有 60 名 男队员 ， 女队员 比 男队员 多 (1/6) ， 女队员 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "870", "content": "小 明 家 离 学校 250 米 ， 小 丽 家 离 学校 400 米 ， 如果 两 人 步行 的 速度 都 是 每分钟 50 米 ， 小 明 从 家 到 学校 所 需 的 时间 是 小 丽 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19032", "content": "有 一批 书 ， 小 明 9 天 可 装订 (3/4) ， 小 丽 20 天 可 装订 (5/6) ． 如果 由 小 明 和 小 丽 两 人 合作 ， 那么 多少 天 可以 装完 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3522", "content": "15 * 26 的 积 ， 除 292 与 98 的 和 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8791", "content": "电业局 架设 一条 通往 山区 的 电线 ． 每天 架设 4.15 米 ， 工作 了 6 天 ， 还 剩 7.1 千米 没 架设 ． 这 条 线路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2380", "content": "王 大伯 家 去年 收 了 2400 千克 柑橘 ， 比 今年 少 (1/11) ． 今年 收 了 多少 千克 柑橘 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9110", "content": "同学 们 去 参观 ， 上午 去 了 3 批 学生 ， 每批 196 人 ， 下午 有 213 人 参观 ， 这 一天 一共 有 多少 学生 参观 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13000", "content": "甲 、 乙 两地 相距 300 千米 ， 甲 车行 完全 程 需要 5 小时 ， 乙 车行 完全 程 需要 6 小时 ， 甲 车 比 乙 车 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5335", "content": "一 套 家具 原来 售价 3200 元 ， 现在 售价 是 2680 元 ， 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7529", "content": "某校 五年级 男 、 女生 人数 的 比 是 5 ： 4 ， 男生 比 女生 多 20 人 ， 女生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3869", "content": "修 一段 公路 ， 第一个 月 修 了 全长 的 (3/10) ， 第 二 个 月 修 了 全长 的 35% ， 还 剩 168 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1051", "content": "学校 有 科普 书 240 本 ， 比 故事书 多 (1/7) ， 故事书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2006", "content": "两个 数 的 积 是 3.8 ， 其中 一个 因数 扩大 10 倍 ， 另 一个 因数 不变 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20139", "content": "3 名 同学 进行 100 米 跑步 比赛 ， 甲 比 乙 少 用 0.75 秒 ， 乙 比 丙 少 用 0.37 秒 ， 丙 的 成绩 是 14.1 秒 ， 甲 的 成绩 = ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "531", "content": "6 一 儿童节 这 一天 ， 新华书店 以 优惠价 销售 了 2530 本 图书 ． 其中 上午 和 下午 销售 的 图书 数量 的 比 是 3 ： 2 ． 下午 卖出 图书 多少 本 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21090", "content": "抗震救灾 捐款 中 王老师 给 同学 们 照相 ． 王老师 冲洗 一卷 胶卷 花 去 21.6 元 ， 又 加洗 了 其中 的 12 张 ， 加洗 每张 要 花 0.55 元 ， 她 共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19592", "content": "鸡 有 3000 只 ， 鹅 的 只 数 是 鸡 的 (3/5) ， 鸭 的 只 数 是 鹅 的 (1/4) ， 鸭 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13590", "content": "甲 、 乙 两筐 苹果 ， 如果 把 甲 筐 苹果 的 (3/8) 放入 乙 筐 内 ， 则 两筐 苹果 重量 相等 ， 原来 乙 筐 苹果 重量 是 甲 筐 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16935", "content": "甲 乙丙 3 人 ， 甲 每 分 走 200 米 ， 乙 每 分 走 225 米 ， 丙 每 分 走 250 米 ， 甲乙 从 东村 、 丙 从 西村 同时 相向 而 行 ， 丙 与 乙 相遇 10 分 后 再 与 甲 相遇 ， 求 东西 村 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19963", "content": "数 100 本 练习本 要 用 90 秒 ， 照 这样 的 速度 数 10000 本 练习本 大约 要 用 多少 秒 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4418", "content": "学校 美术组 有 24 人 ， 合唱组 的 人数 比 美术组 的 4 倍 少 6 人 ， 这 两个 兴趣小组 共有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15342", "content": "一 个数 的 (1/4) 是 100 ， 比 这个 数多 50% 的 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12117", "content": "一 袋 大米 的 (1/5) 正好 是 30 千克 ， 这 袋 大米 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9229", "content": "某 化工厂 一天 能 生产 20 吨 化肥 ． 如果 每 (1/20) 吨 一袋 ， 这些 化肥 可 装 多少 袋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19218", "content": "甲 、 乙 两地 相距 632.5 千米 ， 客车 与 货车 同时 从 甲 、 乙 两地 相对 开出 ， 5.5 小时 后 相遇 ． 已知 客车 平均 每 小时 行 65 千米 ， 货车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4381", "content": "10 减去 它 的 20% ， 再 去除 12 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22506", "content": "一 个 棱 长 是 1.5 米 正方体 无盖 水箱 放在 地上 ， 这 只 水箱 占地 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22044", "content": "修 一条 长 (4/5) 千米 的 路 ， 6 天 就 可以 完成 ， 平均 每天 修 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12093", "content": "甲 数 是 乙 数 的 125% ， 甲 数 比 乙 数多 多少 % ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20162", "content": "我们 有 一块 (2/3) 公顷 的 试验田 ， 其中 (1/5) 公顷 种 土豆 ， 剩下 的 种 大豆 ， 种 大豆 的 面积 = 多少 公顷 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8163", "content": "一 只 梅花鹿 高 1.46 米 ， 长颈鹿 的 身高 比 它 的 2 倍 还 多 0.4 米 ， 长颈鹿 高 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5021", "content": "有 5 个 黄 球 和 8 个 红球 ， 摸 到 黄 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7121", "content": "水果 批发市场 运 来 两批 苹果 ， 第一批 运 来 (3/8) 吨 ， 第 二 批 运 来 (1/5) 吨 ， 两批 一共 运 来 苹果 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1220", "content": "一 堆 货物 ， 已 运走 总数 的 (3/10) ， 如果 再 运 12 吨 ， 这时 已 运 的 吨数 与 总数 的 比 是 1 ： 2 ， 原来 这 堆 货物 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7376", "content": "一 辆车 从 甲地 到 乙地 ， 其中 上坡路 占 全程 的 (4/5) ， 下坡路 占 全程 的 (1/5) ， 上坡 速度 每秒 2 米 ， 下坡 速度 每秒 3 米 ， 这辆 车 的 平均速度 是 每秒 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13701", "content": "一 列 火车 每 小时 行驶 110 千米 ， 飞机 每 小时 飞行 的 速度 比 火车 速度 的 8 倍 少 20 千米 ． 飞机 每 小时 飞行 的 速度 = 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1074", "content": "洗衣机 厂 去年 计划 生产 洗衣机 4800 台 ， 实际 生产 5400 台 ， 实际 比 计划 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4751", "content": "一 件 商品 原价 是 150 元 ， 现在 售价 是 135 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10826", "content": "一 个数 除以 4 ， 余数 最大 可能 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9936", "content": "一 把 椅子 28 元 ， 一张 课桌 56 元 ， 学校 买来 142 套 课桌椅 ， 买 椅子 比 买 桌子 少 花 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11778", "content": "2007 * 20082008 - 2008 * 20072007 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16201", "content": "为 迎接 元旦 ， 学校 制作 了 一批 纸花 ， 其中 红花 140 朵 ， 黄花 比 红花 多 (2/7) ， 黄花 有 多少 朵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5903", "content": "小 明 骑车 从 家 去 学校 ， 平均 每分钟 行 300 米 ， 16 分钟 到达 ． 原 路 返回 时 用 了 12 分钟 ， 平均 每分钟 行 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3751", "content": "妈妈 买 回 苹果 和 橘子 各 3 千克 ， 付出 15 元 ， 找回 4.5 元 ， 每千克 苹果 1.5 元 ， 那 妈妈 买 的 橘子 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10252", "content": "学校 要 购买 一批 椅子 ， 用 200 元 可 买 椅子 8 把 ． 现有 850 元 ， 要 买 48 把 椅子 ， 还 差 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17797", "content": "一 列 长 125 公尺 的 火车 经过 一条 长 150 公尺 的 隧道 ， 由 车头 进入 至 整列 火车 完全 驶出 隧道 需 时 5.5 秒 ； 再 遇上 另 一列 逆向行驶 的 运货 火车 ， 两车 重迭 了 3 秒 ？ 若 运货 火车 长 100 公尺 ， 求 运货 火车 的 车速 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15439", "content": "一 根 钢管 ， 第一次 用 去 了 全长 的 (1/2) ， 第 二 次 用 去 了 全长 的 (1/3) ， 还 剩下 全长 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21793", "content": "甲 仓 存粮 10 吨 ， 乙 仓 存粮 是 甲 仓 的 (4/5) ， 丙 仓 比 乙 仓 少 (2/3) 吨 ， 丙 仓 存粮 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19676", "content": "张明正 在 学习测量 ， 他 测 得 5 本 《 新华字典 》 摞 在 一起 高 15 厘米 ， 他 把 同样 的 一些 《 新华字典 》 摞 在 一起 ， 量 得 高度 是 72 厘米 ， 那么 他 是 把 几本 字典 摞 在 一起 的 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8849", "content": "一 个数 的 (3/4) 是 36 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5306", "content": "某 图书室 借阅 图书 的 归还 期限 为 10 天 ． 小 敏 借 了 一本 故事书 ， 如果 每天 看 5 页 ， 16 天 才能 看 完 ． 她 每天 至少 再 多 看 几页 才能 按时 归还 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7127", "content": "姐姐 上 大学 ， 要 坐 5.6 小时 的 汽车 ， 汽车 的 平均速度 是 80.5 千米 / 时 ． 她 坐 汽车 走 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5818", "content": "火车 从 乙地 开往 丙 地 ， 每 小时 行 80 千米 ， 行 了 3 小时 ， 离 丙 地 还有 96 千米 ， 乙丙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16194", "content": "采矿 队 去年 共 采矿 4500 吨 ， 今年 采矿 量 比 去年 增产 20% ， 两年 一共 采矿 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12344", "content": "商店 运 来 苹果 、 橘子 各 56 筐 ． 已知 每 筐 苹果 重 22 千克 ， 每 筐 橘子 重 28 千克 ． 这 两种 水果 共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20909", "content": "一 捆 铅笔 ， 正好 分给 小巧 4 支 、 小 亚 5 支 、 小 丁丁 6 支 、 小胖 7 支 ． 小 亚 分 得 的 铅笔 的 支数 占 总数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19196", "content": "甲 数 比 乙 数多 30 ， 这个 差 恰好 是 乙 数 的 (1/5) ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3286", "content": "一 双 鞋 降价 (1/5) 后 是 60 元 ， 原价 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17593", "content": "一 件 上衣 打 0.8 后 售价 160 元 ， 这件 上衣 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21400", "content": "一 批 肥皂 ， 第一天 卖 了 总数 的 (2/11) ， 第 二 天 比 第一天 多 卖 8 箱 ， 这时 卖 了 的 箱 数 与 剩下 的 比 是 4 ： 5 ， 这 批 肥皂 一共 有 但 多少 箱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11021", "content": "一 个 等腰三角 形 的 底 是 (2/5) m 一条 腰 是 (1/4) m ， 这个 三角形 的 周长 = 多少 m ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6968", "content": "小 阳 做 一件 上衣 用布 1.5 米 ， 做 一条 裤子 用布 是 一件 上衣 的 (2/3) ， 小 阳 做一套 衣服 用布 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3702", "content": "小 军 收集 了 一些 画片 ， 他 拿出 画片 的 (1/3) 还 多 1 张 送给 小 明 ， 自己 还 剩下 21 张 ． 小 军 原来 有 几张 画片 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6062", "content": "四年级 向 灾区 捐款 658.3 元 ， 五年级 比 四年级 多 捐 132.7 元 ． 两个 年级 共 捐款 多少 元 ？ （ 5% ）", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17319", "content": "一 位 粗心 的 会计 在 给 货主 去 汇款 时 ， 把 货主 开 过来 的 发票 上 的 应付 货款 多 看 了 一位 ， 使 应付 货款 扩大 到 10 倍 ， 几天 后 ， 货主 将 他 多 汇 的 7020 元 如数 退回 ， 则 实际 应付 货款 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8314", "content": "某 车间 6 个 工人 一周 （ 以 5 个 工作日 计算 ） 生产 布 1875 米 ， 平均 每个 工人 每天 能 生产 布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6522", "content": "一 条 公路 修 了 60 千米 ， 正好 是 全长 的 40% ， 求 这 条 公路 剩下 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12092", "content": "452 + 208 的 30 倍 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12050", "content": "某 工地 有 一批 水泥 ， 如果 上午 4 小时 共 运走 140 吨 ， 下午 3 小时 每 小时 运走 28 吨 ． 这 一天 平均 每 小时 运 水泥 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6126", "content": "500 * 32 的 积 再 除以 125 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20795", "content": "一 个数 比 (3/4) 的 (8/9) 多 (1/6) ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18038", "content": "工程队 运 一堆 120 吨 的 建筑材料 ， 第一天 运走 了 总数 的 (3/8) ， 第 二 天 又 运走 了 总数 的 30% ． 两天 后 这 堆 建筑材料 比 原来 少 了 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8896", "content": "从 北京 开往 广州 的 列车长 350 米 ， 每秒钟 行驶 22 米 ， 从 广州 开往 北京 的 列车长 280 米 ， 每秒钟 行驶 20 米 ， 两车 在 途中 相遇 ， 从 车头 相遇 到 车尾 离开 需要 多少 秒钟 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10211", "content": "从 3636 中 连续 减去 多少 个 36 ， 差 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13601", "content": "三年级 同学 参加 “ 陈省身 杯 竞赛 颁奖典礼 ” ， 如果 每排 坐 8 人 可以 坐 12 排 ， 如果 每排 坐 6 人 ， 则 可以 坐满 多少 排 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "798", "content": "李 阿姨 去 服装城 批发 了 125 套 衣服 ， 一件 衣服 65 元 ， 一条 裤子 35 元 ， 李 阿姨 批发 这些 衣服 一共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15786", "content": "青青 水果 超市 上 半月 卖出 85 筐 苹果 ， 下半月 卖出 65 筐 苹果 ， 每 筐 苹果 重 20 千克 ． 青青 水果 超市 这个 月 一共 卖出 多少 千克 苹果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9564", "content": "新华书店 开展 “ 0.95 优惠 ” 购书 活动 ． 王 军 买 了 一本 《 少年 百科全书 》 ， 比 原价 便宜 了 6 元 ， 这 本书 的 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9517", "content": "2010 * 2011 - 2009 * 2012 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18276", "content": "学校 计划 给 通 廊 的 圆柱 外面 涂 上 油漆 ， 经 测量 每 根 圆柱 的 直径 0.4 米 ， 高 4 米 ， 6 根 圆柱 共 需要 涂漆 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "22963", "content": "某班 有 (4/5) 的 同学 参加 了 数学 竞赛 ， 其中 获奖 的 占 参赛 人数 的 (1/4) ， 那么 获奖 的 占 全班 的 多少 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20638", "content": "小 明 栽树 5 棵 ， 大 强 、 李 卫 、 大华 和 冬冬 每个 人 栽 的 棵 数 和 小 明 同样 多 ． 他们 一共 栽树 多少 棵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22983", "content": "一 块 圆形 铁片 ， 半径 2 分 米 ， 面积 = 多少 平方分米 ？", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "2742", "content": "一 件 西服 原价 450 元 ， 现在 的 价格比 原来 降低 了 (1/5) ， 现在 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2371", "content": "某 商店 运 来 一些 水果 ， 第一批 运进 60 吨 ， 第 二 批 运进 30 吨 ， 这 两批 运进 的 水果 占 商店 所有 水果 的 (2/3) ， 商店 一共 有 多少 吨 水果 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12337", "content": "在 汶川 地震 爱心 捐助 活动 中 ， 5 （ 1 ） 班 24 名 男生 共 捐款 1200 元 ， 16 名 女生 共 捐款 1080 元 ． 全班 平均 每人 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3904", "content": "有 80 个 青年 ， 其中 每个 青年 或者 会 骑 自行车 或者 会 游泳 ， 或者 两项 都 会 ， 现在 知道 会 骑 自行车 的 有 65 人 ， 会 骑 自行车 又 会 游泳 的 有 30 人 ， 会 游泳 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9606", "content": "12 的 0.2 倍 和 0.3 的 多少倍 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19559", "content": "水泥厂 今年 拨 出 332.4 万元 用于 治污 ， 改建 污水池 用 去 234.7 万元 ， 又 拨款 85.5 万元 ， 现在 厂里 治污 款 还有 多少 万元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13760", "content": "一 袋 大米 ， 吃 了 50 kg ， 正好 是 这 袋 大米 的 (5/8) ． 这 袋 大米 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8386", "content": "一 台 洗衣机 售价 580 元 ， 一台 彩色 电视机 售价 2400 元 ， 一台 彩色 电视机 售价 是 一台 洗衣机 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11056", "content": "这次 植树 的 成活率 是 95% ， 只有 10 棵 没有 成活 ， 这次 一共 植树 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16095", "content": "学校 买来 240 本 图书 ， 其中 文艺 书 占 (1/3) ， 科技 书 占 (1/4) ， 文艺 书 比 科技 书 多 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20650", "content": "某 超市 上个月 的 营业额 是 450 万元 ， 按 5% 的 税率 缴 营业税 ， 这个 超市 上个月 应 缴 营业税 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21035", "content": "某班 有 50 名 同学 ， 在 一次 测验 中 答对 第一 题 的 有 25 人 ， 答对 第 二 题 的 有 20 人 ， 两 题 都 答对 的 有 10 人 ， 则 有 几名 同学 两 题 都 不 对 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13238", "content": "服装厂 有 布料 201 米 ， 已经 做 了 30 套 校服 ， 每套 用布 2.8 米 ， 剩下 的 计划 每套 用 少 0.2 米 ， 还 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21524", "content": "西瓜 的 质量 比 苹果 多 (3/4) ， 西瓜 占 这 两种 水果 总 质量 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2665", "content": "修筑 一条 长 30 米 的 水渠 ， 8 天 已经 修筑 了 这 条 水渠 的 (8/15) ． 照 这样 计算 ， 修筑 完 这 条 水渠 共 需 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17029", "content": "甲 数 的 40% 与 乙 数 的 50% 相等 ， 甲 数 是 120 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15470", "content": "比 多少 多 37.5% 的 数 是 132 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11758", "content": "张 大爷 养 了 200 只 鹅 ， 鹅 的 只 数 是 鸭 的 (2/5) ． 养 了 多少 只 鸭 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5248", "content": "小 军 看 一 本书 ， 每天 看 14 页 ， 9 天 看 完 ， 这 本书 有 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15374", "content": "小 王 要 将 150 千克 含 药量 20% 的 农药 稀释 成 含 药量 5% 的 药水 ． 需要 加水 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10790", "content": "张老师 借来 一 本书 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 的 是 第一天 的 (2/3) ， 两天 共 看 了 70 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17864", "content": "一 张 长方形 的 彩纸 ， 小 华 用 去 这 张 彩纸 的 (2/9) ， 小 芳 用 去 这 张 彩纸 的 (5/9) ． 两 人 一 共用 去 这 张 彩纸 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12162", "content": "巧克力糖 每千克 45.5 元 ， 买 1.6 kg 应付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3253", "content": "把 20 克 糖 放入 80 水中 ， 水 占 糖水 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6652", "content": "汉光 印刷厂 装订 车间 的 6 个 工人 2 天 装订 《 趣味 数学 》 504 本 ． 平均 每个 工人 每天 装订 多少 本书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19201", "content": "甲 数 是 225 ， 甲 数 是 乙 数 的 5 倍 ， 他们 的 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18492", "content": "快 、 慢 两车 同时 从 a 、 b 两地 开出 ， 它们 的 速度 比 是 5 ： 4 ， 两车 开出 1.5 小时 在 途中 相遇 ， 然后 继续前进 ， 当 快车 到达 终点 时 ， 慢车 还要 多长时间 才能 到达 终点 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "2034", "content": "小 军 每分钟 大约 走 65 米 ， 他 从 家 到 学校 大约 要 走 8 分钟 ． 他家 距 学校 大约 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12771", "content": "水泥厂 生产 一批 水泥 ， 原 计划 每天 生产 水泥 126.5 吨 ， 30 天 完成 ． 实际 只用 了 25 天 就 完成 任务 ， 实际 平均 每天 生产 水泥 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "908", "content": "李老师 把 400 元 钱 存入 银行 ， 定期 整存整取 4 年 ， 年利率 2.80% ． 到期 时 李老师 可 得 税后 利息 多少 元 ？ （ 存款 利息税 按 20% 纳税 ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4646", "content": "商店 运 来 8 筐 苹果 和 10 筐 梨 ， 共 重 430 千克 ， 每 筐 梨 重 23 千克 ， 每 筐 苹果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12920", "content": "老师 去 买 奖品 ， 买 20 份 奖品 ， 每份 7.5 元 ， 如果 用 这些 钱 买 另 一种 奖品 ， 每份 2.5 元 ， 可以 买 多少 份 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22095", "content": "已知 两个 数 的 和 是 325 ， 其中 一个 加数 是 146 ， 另 一个 加数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21937", "content": "ab 两地 相距 540 千米 ， 甲乙 两车 同时 分别 从 a 、 b 两地 对 开 ， 1.5 小时 后 ， 两车 还 相距 360 千米 ． 两车 再行 多少 小时 才能 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9507", "content": "甲 ， 乙 两 同学 相距 1000 米 ， 同时 相向 而 行 ． 甲 同学 速度 为 3 米 / 秒 ， 乙 同学 速度 为 2 米 / 秒 ． 与此同时 ， 一只 小狗 以 6 米 / 秒 的 速度 ， 从 甲 身边 跑 向 乙 ， 遇到 乙 后 又 以 同样 的 速度 跑 向 甲 ， … 如此 往返 ， 直到 甲 、 乙 同学 相遇 ． 问 在 此 段时间 内 ， 小狗 共 跑 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17946", "content": "书包 每 只 零售 25 元 ， 批发 买 4 只 送 一只 ． 按 批发价 平均 每 只 只 需 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7065", "content": "小 明 看 一本 40 页 的 故事书 ， 已经 看 了 25 页 ， 还 剩下 这 本书 的 几分 之 几 没有 看 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9812", "content": "一 种 皮鞋 打 0.7 后 便宜 36 元 ． 这种 皮鞋 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20497", "content": "每套 明信片 12 张 ， 每套 14 元 ， 邮局 今天 卖出 56 套 ， 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5187", "content": "699999 + 69999 + 6999 + 699 + 69 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "1090", "content": "《 安徒生 童话 》 现在 每 本 售价 25 元 ， 比 原价 降低 了 (1/6) ． 现价 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1922", "content": "实验 小学 的 学生 ， 五年级 比 四年级 多 15% ， 四年级 比 三年级 多 25% ， 而 五年级 学生 比 三年级 多 91 人 ， 三年级 有 学生 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "478", "content": "小 明 的 爸爸 在 美国 工作 ， 汇 回 了 6000 美元 ， 到 银行 换成 人民币 ， 能 换 多少 元 ？ （ 1 美元 约合 6.135 元 人民币 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18886", "content": "把 糖 平均 分给 7 个 小朋友 ， 每个 小朋友 都 分 到 3 颗 ， 还 剩 2 颗 ， 这些 糖 一共 有 多少 颗 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15234", "content": "客车 从 始发站 开出 时 正好 满座 ． 到 湖滨 站 时 ， 有 25% 的 乘客 下车 ， 又 有 21 人 上车 ， 这时 9 人 没有 座位 ． 现在 车上 有 乘客 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2657", "content": "8 个 25 相加 的 和 去除 5.3 的 4 倍 ， 结果 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "718", "content": "100 克 蜂 密 中 含有 34.5 克 葡萄糖 ， 500 克 蜂蜜 中 含有 多少 克 葡萄糖 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10286", "content": "动物园 上午 有 游客 587 人 ， 中午 有 239 人 离去 ， 下午 又 来 了 125 位 游客 ． 这时 园内 有 多少 位 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6845", "content": "快 车长 182 米 ， 每秒 行 20 米 ， 慢 车长 1034 米 ， 每秒 行 18 米 ． 两车 同 向 并行 ， 当 快车 车尾 接 慢车 车尾 时 ， 求 快车 穿过 慢车 的 时间 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17047", "content": "学校 买 28 个 足球 共用 去 980 元 ， 买 23 个 排球 共用 去 966 元 ． 平均 每个 排球 比 每个 足球 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18124", "content": "李老师 活 得 稿费 3000 元 ， 稿费 收入 超过 800 元 的 部分 ， 按 14% 的 税率 缴纳 个人所得税 ． 问 李老师 应 缴 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18246", "content": "一 件 衣服 降价 10% 后 ， 售价 是 207 元 ． 这件 衣服 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17145", "content": "4 个 20 与 5 个 10 的 和 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9585", "content": "李 华 家 春季 每月 用电 120 千瓦时 ， 预计 夏季 每月 的 用电量 比 春季 多 (3/4) ， 预计 夏季 每月 用电 多少 千瓦时 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12220", "content": "张老师 出版 了 一本 《 高年级 数学 解题技巧 》 ， 获得 稿费 5000 元 ． 按规定 ， 超出 800 元 的 部分 应 缴纳 14% 的 个人所得税 ． 张老师 应 缴税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3563", "content": "计划 销售 400 台 电视机 ， 实际 比 计划 多 销售 (1/5) ， 实际 销售 多少 台 电视机 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22834", "content": "每千克 苹果 6 元 ， 每千克 梨子 3 元 ， 妈妈 买 了 4 千克 苹果 ， 妈妈 如果 用 同样 多 的 钱 可以 买 多少 千克 梨子 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5384", "content": "一 堆 梨 重 252 千克 ， 取出 12 千克 后 ， 剩下 的 平均 装 在 6 个 箱子 里 ， 每箱 装 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3059", "content": "大润发 超市 进 了 40 箱 苹果 ， 每箱 25 千克 ． 如果 每千克 卖 4.54 元 ， 这些 苹果 可 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20867", "content": "小巧 买 一本 故事书 用 去 13.68 元 ， 买 一本 画报 用 去 15.82 元 ． 她 一共 花 去 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9350", "content": "食堂 运 来 (9/4) 吨 煤 ， 第一周 用 去 (1/3) ， 第 二 周 用 去 (3/5) 吨 ． 两周 共用 去 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17656", "content": "学校 买来 塑料绳 135 米 ， 每 9 米 能 做 5 根 跳绳 ， 照 这样 计算 ， 这些 绳子 可以 做 多少 根 跳绳 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17981", "content": "某班 统计 数学 成绩 ， 平均 成绩 为 85.13 ， 事后 复查 ， 发现 将 李 小 娜 的 成绩 87 分 误 成 78 分 ， 经 重新 计算 后 该班 平均 成绩 是 85.31 ， 这个 班 有 多少 个 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18303", "content": "一 个数 的 (2/3) 是 16 ， 它 的 (4/5) 多少 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20421", "content": "体育 用品商店 有 足球 36 个 ， 正好 是 篮球 数量 的 (3/4) ， 排球 的 数量 是 篮球 的 (5/6) ， 这个 商店 有 排球 多少 个 ？ 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3308", "content": "菜场 运 来 青菜 5800 千克 ， 又 运 来 萝卜 3 车 ， 平均 每 车 装 1250 千克 ， 青菜 比 萝卜 多 运 来 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10706", "content": "小 东 和 小 英 各 有 一些 零钱 ， 小 东 给 小 英 13 元 后 ， 两 人 的 钱 数 同样 多 ． 原来 小 英 比 小 东 少 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20641", "content": "在 一个 圆 内 ， 以 它 的 半径 为 边长 做 一个 正方形 ， 已知 正方形 的 面积 是 10 平方厘米 ， 圆 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19820", "content": "哥哥 给 弟弟 2 只 铅笔 后 ， 两 人 的 铅笔 数 一样 多 ， 则 原来 哥哥 比 弟弟 多 多少 只 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15658", "content": "王老师 买 了 两本 参考书 ． 《 小学 数学 教学 指导 》 和 《 数学 手册 》 ， 其中 《 小学 数学 教学 指导 》 每 本 12.36 元 ， 《 数学 手册 》 比 《 小学 数学 教学 指导 》 贵 4.25 元 ． 王老师 给 了 售货员 50 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1444", "content": "除数 和 商都 是 29 ， 则 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5565", "content": "少先队员 参加 植树 活动 ， 五年级 植树 123 棵 ， 四年级 比 五年级 子 多 植树 21 棵 ， 四年级 植树 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10525", "content": "王明 读 一 本书 ， 读 了 若干 页 后 ， 这时 已 读 的 页数 和 未 读 的 页数 的 比 是 2 ： 3 ， 如果 再 读 5 页 ， 这时 已 读 的 页数 和 未 读 的 页数 的 比 是 9 ： 11 ． 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19538", "content": "某班 有 学生 48 人 ， 其中 (5/8) 达到 了 《 国家 体育锻炼 标准 》 ， 达到 标准 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4025", "content": "20 米 的 (3/5) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18590", "content": "汽车 5 小时 行驶 240 千米 ， 平均 每 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4112", "content": "有 2000 千克 的 水果 ， 它 的 含水量 为 99% ， 经过 一段时间 的 晾晒 后 ， 含水量 下降 到 98% ， 晾晒 后 的 水果 重量 = 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10282", "content": "计算 ： 3.6 * 42.3 * 3.75 - 12.5 * 0.423 * 28 = ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "3547", "content": "供电局 原来 有 捆 电线 长 14.85 米 ， 工人 师傅 第一次 用 去 0.75 米 ， 第 二 次 又 用 去 1.25 米 ， 这时 电线 还 剩 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20903", "content": "2013 年 3 月 12 日 李 阿姨 买 了 5000 元 的 5 年期 国债 ， 年利率 是 5.41% ， 5 年 后 她 可以 取出 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11772", "content": "某村 去年 植树造林 20 公顷 ， 今年 比 去年 增加 了 25% ， 今年 植树造林 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19140", "content": "六年级 年级 学生 200 人 ， 一次 数学 测试 的 及格率 为 98% ， 不及格 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18586", "content": "王 玲 有 4.50 元 钱 ， 买 一本 1.05 元 的 连环画 和 一盒 2.95 元 的 颜料 ， 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20005", "content": "粮食 加工厂 运出 4 车 面粉 ， 每 车 装 107 袋 ， 每 袋 25 千克 ． 一共 运出 面粉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9050", "content": "小 丫 妈妈 把 10000 元 人民币 存入 银行 ， 定期 3 年 ， 年利率 是 3.33% ． 到期 时 ， 小 丫 应得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5005", "content": "一 辆 汽车 上午 行驶 了 2.5 小时 ， 平均 每 小时 行 68 千米 ， 下午 3 小时 行 了 220.5 千米 ． 这辆 汽车 一天 共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20040", "content": "六年级 会 跳 拉丁舞 的 人数 是 不会 跳 拉丁舞 人数 的 20% ， 不会 跳 拉丁舞 的 人数 比 会 跳 拉丁舞 的 多 32 人 ， 会 跳 拉丁舞 的 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4313", "content": "地球 的 表面 大部分 被 海洋 覆盖 ， 太平洋 约 占 地球表面 的 (1/3) ， 大西洋 约 占 地球表面 的 (1/5) ． 这 两个 洋 的 面积 一共 约 占 地球表面 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22561", "content": "学校 组织 4 、 五年级 的 同学 去 游乐园 ， 五年级 去 了 145 人 ， 四年级 去 了 132 人 ， 五年级 买 门票 比 四年级 多用 65 元 ． 每张 门票 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10584", "content": "学校 防 “ 非典 ” 准备 用 过氧乙酸 进行 消毒 ， 已知 药 和 水 的 比 是 1 ： 200 ， 现 需要 配制 药水 241.2 千克 ， 需 准备 过氧乙酸 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16635", "content": "袋子 里 有 5 个 红球 ， 2 个 白 球 ， 3 个 黄 球 ， 则 摸 到 白 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20902", "content": "冰 融化 成 水 后 体积 减少 原来 的 (1/11) ， 则 水 结成 冰 体积 会 增加 原来 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "199", "content": "王老师 家 的 书 可 多 了 ， 书房 内 并 排列 着 6 个 同样 的 书橱 ， 每个 书橱 有 4 层 ， 里面 的 书 都 放 得 整整齐齐 的 ， 我 数 了 其中 的 一层 共 42 本书 ， 同学 们 你 能 猜 一 猜 王老师 有 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14674", "content": "158 * 24 与 35 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8", "content": "买 一套 住房 ， 售价 28 万元 ， 每年 付 2 万元 ， 多少 年 后 才能 付清 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10526", "content": "小 方 看 一 本书 要 用 5 天 ， 第一天 看 了 它 的 (2/5) ， 第 二 天 看 了 这 本书 的 (2/7) ， 还 剩下 几分 之 几 没 看 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9347", "content": "饲养 小组 养 了 28 只 母鸡 ， 养 的 小鸡 是 母鸡 的 4 倍 ， 小鸡 和 母鸡 共养 了 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16429", "content": "草地 上 黑山羊 有 24 只 ， 白 山羊 是 它 的 (3/4) ， 白 山羊 有 多少 只 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5892", "content": "街心公园 里 有 杨树 60 棵 ， 槐树 棵 数 是 杨树 棵 数 的 (5/6) ， 柳树 棵 数 是 槐树 棵 数 的 (4/5) ． 公园 里 有 柳树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16406", "content": "商店 原有 365 箱 牛奶 ， 第一周 卖出 了 218 箱 ， 第 二 周 又 运进 了 129 箱 ． 现在 商店 里 有 牛奶 多少 箱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7843", "content": "某 鞋店 进来 运动鞋 180 双 ， 运进 的 皮鞋 比 运动鞋 多 (2/3) ， 皮鞋 比 运动鞋 多 多少 双 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1227", "content": "一 头牛 体重 0.34 吨 ， 一只 大象 的 体重 是 一头 牛 的 15 倍 ： 这 只 大象 比 这 头牛 重 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8400", "content": "6 （ 1 ） 班 有 学生 55 人 ， 数学 期中考试 成绩优秀 率 80% ， 没有 达到 优秀 的 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13957", "content": "世界 上 最高 的 动物 是 长颈鹿 ． 大象 高 3 米 ， 一只 长颈鹿 比 大象 高 (2/3) ， 这 只 长颈鹿 高 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16881", "content": "树上 有 20 只 小鸟 ， 第一次 飞 走 3 只 ， 第 二 次 又 飞 走 了 5 只 ， 一共 飞 走 了 多少 只 小鸟 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3481", "content": "一 种 手榴弹 爆炸 后 ， 有效 的 杀伤 半径 是 15 米 ， 杀伤 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14784", "content": "一 堆 煤 3 吨 ， 烧 了 (4/5) 吨 ， 还 剩 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10352", "content": "小 明 买 7 张 光盘 和 42 张 软盘 用 了 252 元 ， 每张 软盘 4 元 ， 一张 光盘 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21156", "content": "一 个 圆形 花坛 的 直径 是 10 米 ， 在 花坛 的 周围 摆 上 花盆 ， 每隔 1.57 米 放 一盆 ， 一共 可以 放 多少 盆 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 比 第一天 多 看 14 页 ， 剩下 的 25 页 第 3 天 看 完 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4673", "content": "新光 农场 种 白菜 1200 公顷 ， 种 的 萝卜 是 白菜 的 (4/5) ， 萝卜 又 是 黄瓜 的 (3/4) ， 种 黄瓜 多少 公顷 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3506", "content": "一 辆 汽车 从 甲 城 运货 到 乙 城 平均 每 小时 行 45.6 千米 ， 4.2 小时 到达 ． 返回 时 用 了 3.6 小时 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17705", "content": "光明 小学 六年级 有 学生 360 人 ， 五年级 比 六年级 的 人数 少 (1/5) ， 五年级 比 六年级 少 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14168", "content": "一 家 大型 化肥厂 ， 计划 全年 生产 化肥 45000 吨 ， 但 上半年 就 完成 了 全年 计划 的 60% ， 下半年 完成 了 全年 计划 的 70% ． 实际 比 计划 多 生产 了 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3712", "content": "有 5 筐 苹果 的 重量 相等 ， 如果 从 每 筐 中 取出 10 kg ， 那么 剩下 的 苹果 相当于 原来 3 筐 的 重量 ， 原来 每 筐 苹果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20667", "content": "商店 出售 的 一种 电视机 比 原来 降价 (2/11) ， 正好 降低 了 650 元 ， 这种 电视机 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10973", "content": "一 堆 煤 的 质量 等于 这 堆 煤 重 的 (1/5) + (2/5) 吨 ， 这 堆 煤 重 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16125", "content": "一 列 火车 从 甲 城 开往 乙 城 ， 每 小时 行 50 千米 ， 4.8 小时 可以 到达 ， 如果 速度 提高 (1/5) ， 那么 可以 提前 几小时 到达 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3949", "content": "练一练 ： 甲乙 两车 同时 同 地 相反 方向 开出 ， 甲 车 每 小时 行 40 千米 ， 乙 车 乙 车 每 小时 快 5.5 千米 ． 4 小时 后 ， 两车 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12776", "content": "把 5 克 盐 放入 55 克 水中 ， 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7186", "content": "□ / 7 = 20 … 5 的 算式 中 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2878", "content": "7 千克 油菜籽 可 榨 3 千克 菜籽油 ， 那么 ， 榨 1 千克 菜籽油 需要 多少 千克 油菜籽 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9069", "content": "化肥厂 要 运 化肥 960 袋 ， 用 2 辆 卡车 运 3 次 ， 平均 每辆 卡车 每次 运 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6542", "content": "一 列 火车 经过 南京长江大桥 ， 大桥 长 6700 米 ， 这 列 火车 长 140 米 ， 火车 每分钟 行 400 米 ， 这 列 火车 通过 长江大桥 需要 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14664", "content": "一 个 周长 100 米 的 圆形 池塘 ， 每隔 5 米 载 一棵 柳树 ， 需要 多少 棵 柳树 苗 才能 载 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3879", "content": "864 / 8 商 的 最高 位 = 多少 位 ， 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8904", "content": "某 车队 运送 一批 救灾物资 ， 原 计划 每 小时 行 60 千米 ， 7.5 小时 到达 灾区 ， 实际 提前 1.5 小时 到达 灾区 ， 实际 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19019", "content": "某人 骑 摩托车 从 甲 市 到 乙 市 ． 第一 小时 行 了 38 千米 ， 第 二 小时 行 了 全程 的 (1/3) ， 这时 离 甲 市 63 千米 ， 甲乙 两 市 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1387", "content": "儿童 体内 水分 含量 约 是 体重 的 78% ， 小 华 的 体重 是 35 千克 ， 他 体内 的 水分 含量 大约 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21008", "content": "张老师 要 要 打 一篇 8650 字 的 论文 ． 前 5 小时 完成 了 25% ， 照 这样 打 下去 ， 余下 的 还要 打 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4739", "content": "学校 图书室 现有 科技 书 1420 册 ， 文艺 书 比 科技 书 的 5 倍 少 40 册 ， 连环画 比 文艺 书 少 260 册 ． 图书室 有 连环画 多少 册 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15947", "content": "2011 * 20102010 - 2010 * 20112011 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22761", "content": "某 批 稻谷 种子 的 发芽率 是 97% ， 不 发芽率 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7454", "content": "在 航模 比赛 现场 ， 六年级 有 观众 245 名 ， 比 五年级 的 多 (1/4) ， 五年级 有 观众 多少 名 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17258", "content": "一 种 计算器 ， 打 0.8 后 需 64 元 ， 如果 打 0.75 ， 需要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17964", "content": "东方 俱乐部 共有 女 会员 55 人 ， 男 会员 比 女 会员 多 (1/5) ， 男 会员 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18037", "content": "李 叔叔 4 天 卖 了 8 箱 冰棒 ， 冰棒 每箱 30 支 ， 李 叔叔 平均 每天 卖 多少 支 冰棒 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "484", "content": "一 辆 汽车 从 甲地 到 乙地 ， 每 小时 行 65 千米 ， 行驶 了 6 小时 ， 离 乙地 还有 35 千米 ， 甲乙 两地 的 路程 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22427", "content": "某人 从 甲地 去 乙地 ， 去 时 每 小时 行 12 千米 ， 回来 时 每 小时 行 10 千米 ， 这个 人 往返 一次 的 平均速度 是 每 小时 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2417", "content": "小 红 看 一本 105 页 的 《 科学 探索 》 ， 已经 看 了 65 页 ， 剩下 的 页数 是 全书 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9193", "content": "一 座 大桥 长 3500 米 ， 一列 火车 通过 这 座 大桥 时 每分钟 行驶 950 米 ， 从 车头 开 上 桥 到 车尾 离开 桥 一 共用 了 4 分钟 ． 这 列 火车 长 多少 米 哦 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1799", "content": "光明 鞋厂 6 月份 计划 生产 鞋 24000 双 ， 实际 生产 了 25200 双 ． 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6484", "content": "一 个 长方形 ， 长 45 分 米 ， 宽 21 分 米 ， 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2886", "content": "建设 乡 今年 植树 414 万棵 ， 比 去年 增加 了 15% ， 去年 植树 多少 万棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8061", "content": "小 红 看 一 本书 ， 每天 看 6 页 ， 20 天 可 看 完 ． 如果 限定 15 天 看 完 ， 平均 每天 需要 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "651", "content": "学校 买 一批 书 ， 其中 有 故事书 310 本 ， 文艺 书 240 本 ， 其余 是 科技 书 ， 已知 科技 书 占 这 批 书 总数 的 45% ， 买来 科技 书 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "79", "content": "小 红 家 到 学校 的 距离 是 800 米 ， 早上 ， 小 红 从 家 到 学校 ， 已 行 了 全程 的 (3/4) ， 她 现在 离家 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17183", "content": "一 个 班 有 22 个 男生 ， 平均 身高 140.5 厘米 ； 有 18 个 女生 ， 平均 身高 142.1 厘米 ． 全班同学 的 平均 身高 = 多少 厘米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3306", "content": "服装厂 一天 上午 卖出 54 件 羽绒服 ， 下午 卖出 同样 的 羽绒服 36 件 ， 每件 羽绒服 售价 320 元 ． 上午 比 下午 多 卖 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11653", "content": "胜利 小学 植树节 共 植树 300 棵 ， 成活 的 棵 数 与 未 成活 的 棵 数 的 比 是 22 ： 3 ， 成活 的 树苗 有 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22013", "content": "有 一筐 苹果 ， 卖出 (3/5) 后 ， 还 剩 12 千克 ， 那么 这 筐 苹果 原来 有 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15192", "content": "一 种 电视机 现在 售价 1700 元 ， 比 原来 每 台 降价 800 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3027", "content": "一 件 商品 原价 50 元 ， 提价 20% 后 再 打 0.9 出售 ， 现价 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10788", "content": "新飞 建材厂 新建 厂房 ， 原 计划 投资 500 万 ， 实际 投资 477 万 ， 实际 比 原 计划 减少 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9435", "content": "一 辆 旅游车 在 平原 和 山区 各 行驶 了 4 小时 ， 到达 了 目的地 ． 在 平原 的 速度 是 72 千米 / 时 ， 在 山区 的 速度 是 35 千米 / 时 ． 到达 目的地 时 总共 行驶 了 多 远 的 路程 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19893", "content": "小 芳 在 计算 一个 数 除以 10 时 ， 将 除 号 看成 了 乘 号 ， 结果 得 3.2 ， 正确 的 结果 应该 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1993", "content": "爸爸 今年 35 岁 ， 儿子 今年 8 岁 ， 15 年 后 ， 他们 俩 共 多少岁 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20285", "content": "一 个 打字员 6 分钟 打 504 个 字 ， 打 一篇 文章 用 了 15 分钟 ． 这 篇文章 有 多少 个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21068", "content": "同学 们 上山 走 了 885 米 ， 下山 的 路 比 上山 的 路 多 180 米 ． 下山 要 走 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3877", "content": "2 - (1/5) + (4/5) = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13669", "content": "一 条 公路 已修 (2/5) ， 如果 再 修 50 千米 ， 就 正好 修 完 这 条 公路 的 (1/2) ． 这 条 公路 一共 有 多少 千米 长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8808", "content": "一 台 电脑 原价 4800 元 ， 先 提价 (1/6) ， 后来 进行 促销 活动 ， 降价 (1/4) 出售 ． 现价 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "1022", "content": "慈 客 隆 掌 起 二 店 5 月份 新 进 水果 250 千克 ， 卖出 了 (2/5) ， 卖出 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8830", "content": "单独 加工 一批 零件 ， 甲 要 (1/2) 小时 ， 乙 要 (1/3) 小时 ， 甲乙 合作 ， 多少 小时 可以 完成 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9636", "content": "商店 运 来 一些 水果 ， 梨 的 筐 数 是 苹果 筐 数 的 (3/4) ， 苹果 的 筐 数 是 橘子 筐 数 的 (4/5) ． 运 来 梨 15 筐 ， 运 来 橘子 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5409", "content": "师傅 每天 加工 48 个 零件 ， 徒弟 每天 加工 36 个 零件 ， 每天 徒弟 比 师傅 少 加工 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6019", "content": "小 明 买 笔 用 了 15.5 元 ， 买 书 用 了 24.6 元 ， 小 明 一 共用 了 多少 钱 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20735", "content": "爸爸 把 5000 元 存 人 银行 ， 定期 3 年 ， 年利率 是 4.14% ， 到期 后 ， 一共 可以 得到 本金 和 利息 多少 元 ？ （ 不用 缴纳 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21260", "content": "生产 车间 上个月 制造 零件 1280 个 ， 本月 比 上 月 超产 150% ， 本月 制造 零件 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3772", "content": "一 本 童话故事 12.50 元 ， 一本 字典 55.62 元 ， 小林 付给 售货员 100 元 买 这 两样 东西 ， 应 找回 多少 元 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4694", "content": "小 华 2008 年 2 月 26 日 把 1000 元 压岁钱 存入 银行 ， 整存整取 一年 ， 年利率 是 4.14% （ 税率 5% ） ． 准备 到期 后 把 税后 利息 捐赠 给 “ 希望工程 ” ． 到期 时 小 红 可以 捐赠 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "6815", "content": "一 辆 儿童 3 轮 车 售价 是 290 元 ， 刚好 是 一辆 成人 电动车 的 10% ， 一辆 成人 电动车 售价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18911", "content": "5 （ 1 ） 班 进行 统计 时 发现 ， 跳绳 、 打乒乓球 这两项 活动 ， 全班 每人 至少 喜欢 一种 ． 全班 有 (3/5) 的 同学 喜欢 跳绳 ， 有 (4/7) 的 同学 喜欢 打乒乓球 ， 两样 都 喜欢 的 占 全班 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20315", "content": "张 叔叔 有幸 成为 了 奥运 火炬手 ， 在 接力 过程 中 ， 他 (1/3) 小时 行 了 (3/2) 千米 ， 张 叔叔 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6611", "content": "小 明 有 32 本 小 画 书 ， 小 军 的 小 画 书 是 小 明 的 4 倍 ， 两 人 一共 有 多少 本 小 画 书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20289", "content": "286 - 86 与 64 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3418", "content": "5 （ 1 ） 班 有 男生 28 人 ， 男生 比 女生 少 了 (1/8) ． 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20731", "content": "春 芽 小学 自然 兴趣小组 12 人 共 采集 花籽 9.84 千克 ， 平均 每人 采集 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17407", "content": "6 福 鸡场 卖出 一批 肉鸡 ， 第一次 卖出 肉鸡 总数 的 40% ， 第 二 次 卖出 肉鸡 总数 的 (1/3) ， 还 剩 肉鸡 1200 只 ， 鸡场 有 肉鸡 共 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21262", "content": "商场 运 来 苹果 (3/4) 吨 ， 比 运 来 的 梨 多 (1/3) 吨 ， 运 来 的 香蕉 比 梨 多 (1/5) 吨 ， 运 来 香蕉 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21859", "content": "生产 一批 零件 ， 第一天 生产 了 180 个 ， 第 二 天 生产 的 比 总数 的 (1/4) 少 30 个 ， 两天 共 生产 了 总数 的 (1/3) ． 这 批 零件 共有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21635", "content": "笑笑 读 一 本书 ， 第一天 读 了 全书 的 (1/4) ， 第 二 天 读 了 全书 的 20% ， 第 3 天 她 从 第 91 页 读 起 ， 请 你 算算 这 本书 共 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2808", "content": "服装店 进 了 400 套 衣服 ， 8 天 就 卖出 了 (4/5) ， 还 剩下 多少 套 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1813", "content": "学校 安装 自来水管 ， 用 了 长 10 米 的 管子 108 根 ， 长 12 米 的 管子 130 根 ． 一 共用 了 多少 米 管子 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21212", "content": "一 种 商品 打 0.7 的 售价 是 42 元 ， 它 的 原价 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8723", "content": "甲 有 150 元 ， 乙 的 钱 比 甲 的 2 倍 还 多 35 元 ， 乙 有 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2258", "content": "一 个数 除以 3 ， 商 是 17 ， 余数 是 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11532", "content": "学校 运 来 240 棵 树苗 ， 按 5 ： 4 ： 3 分配 给 4 、 5 、 六年级 去 种植 ， 六年级 分 得 树苗 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14457", "content": "一 个 篮球 125 元 ， 学校 要 购买 9 只 篮球 ， 一共 要 花 几元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22974", "content": "一 条 裤子 148 元 ， 一件 上衣 的 价钱 是 一条 裤子 的 2 倍 ， 买 一套 这样 的 衣服 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5252", "content": "把 一个 长 7 厘米 ， 宽 6 厘米 ， 高 4.5 厘米 的 长方体 铁块 和 一个 棱 长 5 厘米 的 正方体 的 铁块 ， 熔铸 成 一个 大 圆柱体 ， 这个 圆柱体 的 底 面积 是 78.5 平方厘米 ， 那 圆柱 的 高 应 = 多少 厘米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7974", "content": "甲 、 乙 两辆 汽车 同时 从 扬州 开往 南京 ， 经过 4 小时 后 ， 甲 车 落 在 乙 车 后面 28 千米 ． 甲 车 每 小时 行 68 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7907", "content": "计算 ： 2007 - 7 * 11 * 13 * 2 = ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8756", "content": "光明 实验 小学 买来 8 盒 教具 ， 每盒 7 件 ， 共用 去 1008 元 ， 平均 每件 教具 要 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "278", "content": "啄木鸟 一天 能 吃 645 只 害虫 ， 青蛙 8 天 能 吃 608 只 害虫 ． 啄木鸟 每天 比 青蛙 多 吃 害虫 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3612", "content": "果园 里 有 桃树 96 棵 ， 苹果树 棵 数 是 桃树 的 (3/4) ． 果园 里 桃树 和 苹果 共有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3862", "content": "瓷器 厂 要 将 768 个 花瓶 装箱 运走 ． 每 8 个 花瓶 装 一箱 ， 分 4 次 运 完 ， 每次 要 运 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19612", "content": "书店 原有 10 个人 ， 刚 进来 了 7 个人 ， 又 走 出去 9 个人 ， 现在 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3549", "content": "商店 有 75 支 钢笔 ， 是 圆珠笔 支数 的 (3/5) ， 钢笔 和 圆珠笔 一共 有 多少 支 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14917", "content": "甲 、 乙 两 数 的 平均数 是 150 ， 甲 、 乙 两 数 的 比 是 3 ： 2 ， 乙 数 比 甲 数 少 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2441", "content": "菜市场 运 来 黄瓜 1200 千克 ， 比 西红柿 少 (1/5) ， 茄子 的 重量 是 西红柿 的 90% ， 菜市场 运 来 茄子 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14289", "content": "一 个 空 水池 ， 有 甲 、 乙 两个 进水管 ， 两 水管 同时 打开 ， 4 小时 注入 的 水 占 水池 容积 的 40% ， 若 甲 水管 再 开 5 小时 ， 同时 乙 水管 再 开 7.4 小时 ， 刚好 注满 水池 ， 如果 单 开 乙 水管 ， 多少 小时 可 将 空 池 注满 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "9310", "content": "新华 小学 有 学生 450 人 ， 其中 360 人 是 少先队员 ． 少先队员 占 全校学生 人数 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4860", "content": "○ / 65 = 24 ， ○ = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21023", "content": "甲乙 两艘 轮船 同时 从 上海 开往 武汉 ， 甲 船 每 小时 行 24 千米 ， 经过 8.5 小时 甲 船 超过 乙 船 51 千米 ． 乙 船 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20655", "content": "小 丽 计划 看 一本 小说 ， 每天 看 全部 页数 的 (1/9) ， 按计划 小 丽 看 了 6 天 后 还 剩下 30 页 没有 看 完 ， 这本 小说 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21174", "content": "一 辆 汽车 每 小时 行 60 千米 ， 一列 特快 列车 的 速度 是 这辆 汽车 的 2 倍 ， 而 磁悬浮列车 的 速度 比 这 列 特快 列车 的 速度 的 3 倍 多 70 千米 ． 磁悬浮列车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9450", "content": "2 台 播种机 10 时 播种 30000 平方米 ， 平均 每 台 播种机 每 时 播种 多少 平方米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15057", "content": "元旦 期间 ， 某 旅游 店 的 老板 进 了 1000 瓶 矿泉水 ， 前 1 天 卖出 了 全部 的 (2/5) ， 后 2 天 卖出 了 全部 的 (3/8) ， 假期 后 还 剩下 多少 瓶 没 卖出 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "23038", "content": "一 家 商场 ， 十 月份 的 营业额 是 352.6 万元 ， 按 营业税 率 5% 计算 ， 这个 月 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1601", "content": "修 一条 路 ， 每天 修 5 千米 ， 8 天 正好 修 全长 的 (1/4) ， 以后 每天 多 修 (5/2) 千米 ， 正好 按期 完工 ． 修 完 这 条 路 用 了 多少 天 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "14756", "content": "四年级 两个 班 为 灾区 小朋友 献爱心 ， 平均 每人 捐献 了 13 本书 ， 一班 有 51 人 ， 二 班 有 49 人 ， 两个 班 一共 捐献 了 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19320", "content": "一 个 圆形 花坛 的 周长 是 30 米 ， 在 它 的 边上 每隔 3 米 摆 一 盆花 ， 一共 需要 多少 盆花 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7105", "content": "玲玲 的 妈妈 每月 收入 1280 元 ， 爸爸 每月 收入 1320 元 ， 全家 每月 生活 支出 的 钱 数 是 储蓄 的 4 倍 ， 玲玲 家 每月 储蓄 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12010", "content": "一 根 钢管 长 4.9 米 ， 王 叔叔 想 把 它 锯 成 每 段长 为 0.7 米 的 小 段 ， 每 锯 一段 耗时 3.5 分 ， 锯 完 这根 钢管 共 耗时 多少 分 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19981", "content": "同学 们 去 划船 ， 男同学 去 了 23 人 ， 女同学 去 了 29 人 ， 每 4 人 坐 一条 船 ， 一共 需要 租 多少 条 船 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7268", "content": "一 条 路 长 480 米 ， 已经 修 了 (5/8) ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15579", "content": "把 12.6 平均 分成 15 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16008", "content": "东 东家 书房 地面 面积 是 8.75 平方米 ， 正好 用 了 35 块 地砖 ， 每块 地砖 的 面积 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19896", "content": "玩具厂 今年 生产 玩具 4000 件 ， 比 去年 减产 1000 件 ， 今年 比 去年 减产 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8364", "content": "光明 小学 扩建 教学楼 ， 原 计划 投资 20 万元 ， 实际 投入 18 万元 ， 实际 比 计划 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13451", "content": "装订 一批 书 ， 第一天 装订 了 这 批 书 的 (1/8) ， 第 二 天 装订 了 1400 册 ． 这时 没 装订 的 占 总数 的 (7/12) ， 这 批 书 一共 有 多少 册 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12605", "content": "一 个 长方形 的 游泳池 ， 长 25 米 ， 宽 12 米 ， 池 深 1.4 米 ． 放入 360 立方米 的 水 ， 这个 游泳池 里 水深 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15674", "content": "某人 以 5000 元 的 价格 买入 了 一批 河蟹 ， 因 某种原因 只 卖 了 4500 元 ， 则 他 这笔 生意 的 亏损率 为 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3839", "content": "仓库 里 有 一堆 重 588 千克 的 小麦 ， 如果 28 千克 装 一袋 ， 需要 多少 个 袋子 来 装 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1303", "content": "慈溪市 人民 公园 上午 有 游客 410 人 ， 中午 有 152 人 离去 ， 下午 又 来 了 174 人 ， 这时 公园 内 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3996", "content": "在 一条 长 120 米 的 隧道 一侧 ， 从头到尾 共 安装 了 16 盏 节能灯 （ 两头 都 安装 ） ， 平均 每隔 多少 米 安装 一盏灯 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9308", "content": "一 条 彩带 剪下 两段 ， 第一段 占 总长 的 (5/12) ， 第 二 段 占 总长 的 (1/4) ， 剩下 的 占 总长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1031", "content": "小 明 从 甲地 去 乙地 ， (5/3) 小时 走 了 15 千米 ， 正好 走 了 全程 的 (3/4) ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16641", "content": "修 一条 长 2875 千米 的 铁路 ， 已经 修 了 425 千米 ， 剩下 的 计划 5 天 修 完 ． 平均 每天 要 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16985", "content": "一 个 圆 的 直径 增加 5 厘米 ， 这个 圆 的 周长 增加 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19869", "content": "两个 修路 队 ， 甲队 有 118 人 ， 乙 队 比 甲队 的 2 倍 少 10 人 ， 两个 修路 队 一共 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19832", "content": "少先队员 在 果园 ， 上午 摘 了 18 筐 苹果 ， 比 下午 少 摘 了 100 千克 ， 下午 摘 了 22 筐 ， 平均 每 筐 苹果 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9431", "content": "每 上 一层 楼梯 要 走 18 级 台阶 ， 到 小 明 家 要 走 72 级 台阶 ， 小 明 家住 在 多少 楼 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16050", "content": "一 筐 苹果 ， 吃 了 一些 后 ， 还 剩下 (2/3) ， 正好 是 10 千克 ， 这 筐 苹果 原来 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17076", "content": "工厂 原有 煤炭 1 吨 ， 第一天 用 去 (2/9) 吨 ， 第 二 天 用 去 的 和 第一天 同样 多 ， 还 剩 多少 吨 煤炭 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13826", "content": "小 红 和 小强 给 街心花园 里 的 所有 小树 浇水 ， 小 红 浇 了 (3/9) ， 小强 浇 了 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12972", "content": "一 条 大堤 长 1200 米 ， 从头到尾 每隔 4 米 栽 一棵 垂柳 ， 可 栽 多少 棵 垂柳 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7281", "content": "30.6 - 12.1 与 8.7 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7889", "content": "一 本书 ， 小 明 从 第 2 页 看到 第 5 页 ， 他 看 了 多少 页 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21959", "content": "一 桶 油 重 90 千克 ， 第一次 倒 出 (2/5) ， 第 二 次 倒 出 (4/5) 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1548", "content": "小 丽 打 自己 的 作 文稿 ， 她 每分钟 大约 能 打 45 个 字 ， 打 好 一篇 作文 刚好 用 了 24 分钟 ， 这 篇 文稿 大约 有 多少 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17195", "content": "在 有 余数 的 除法 里 ， 除数 是 7 ， 最大 的 余数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7450", "content": "甲 数 的 (2/5) 与 乙 数 的 (1/2) 相等 ， 甲 数 是 120 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7960", "content": "今年 8 月份 ， 甲 所得 的 奖金 比 乙 少 200 元 ， 甲 得 的 奖金 的 (2/3) 正好 是 乙 得 奖金 的 (4/7) ， 甲 得 奖金 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8666", "content": "一 台 压路机 的 前轮 是 圆柱形 ， 轮 宽 2 米 ， 半径 0.5 米 ． 前轮 转动 一周 ， 压路 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "15240", "content": "两列 火车 从 两个 车站 同时 相向 开出 ． 甲 车 每 小时 行 95 千米 ， 乙 车 每 小时 行 85 千米 ， 经过 3 小时 两车 相遇 ． 两个 车站 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10879", "content": "哥哥 上 大学 ， 要 坐 8.5 小时 的 火车 ， 火车 的 平均速度 是 70.4 千米 / 小时 ． 他 坐火车 走 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18042", "content": "笑笑 读 一本 故事书 、 已经 读 了 90 页 、 还 剩下 这 本书 的 (1/3) 没有 读 、 这本 故事书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4779", "content": "某 学校 六年级 男生 人数 占 全年 级 人数 的 (5/9) ， 男生 有 225 人 ， 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13612", "content": "水果店 有 30 箱 香蕉 和 4 箱 苹果 ， 每箱 的 重量 都 是 25 千克 ， 水果店 一共 有 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3298", "content": "汽车 甲 、 乙 从 相距 420 千米 的 a 、 b 两地 同时 出发 相对 而 行 ， 甲 车 的 速度 是 每 小时 64 千米 ， 乙 车 的 速度 是 甲 车 的 (7/8) ． 两车 经过 几个 小时 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15395", "content": "学校 图书馆 科技 书 占 图书 总数 的 40% ， 故事书 占 图书 总数 的 30% ， 科技 书 比 故事书 多 1200 本 ． 学校 图书馆 共有 图书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11605", "content": "65 / 多少 = 10 … 5 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14450", "content": "一 台 彩色 电视机 ， 原来 售价 3000 元 ， 降价 (1/5) 后 ， 现价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20721", "content": "口袋 中 有 15 个 黑 球 ， 13 个 白 球 和 10 个 红球 ， 至少 从中 摸 出 多少 个 球 ， 才能 保证 其中 一定 有 白 球 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22102", "content": "学校 共有 2100 名 学生 ， 其中 男生 占 总 人数 的 (8/15) ． 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17019", "content": "小 明 买 了 4 只 篮球 ， 付给 售货 阿姨 100 元 钱 ， 找回 24 元 ． 平均 每 只 篮球 有 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8216", "content": "(2/7) + (3/7) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1416", "content": "学校 会议室 长 12 米 ， 宽 8 米 ． 一共 铺 了 384 块 地砖 ， 平均 每平方米 铺 了 多少 块 地砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3447", "content": "有 15 个 小朋友 一起 玩 捉迷藏 游戏 ， 已 捉 到 5 个 、 还 剩 多少 个 没 捉 到 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18723", "content": "计算 ： 45 * 1234321 - 3333 * 9999 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6561", "content": "学校食堂 运 来 大米 和 面粉 各 6 袋 ， 大米 每 袋 50 千克 ， 面粉 每 袋 25 千克 ， 一共 运 来 粮食 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18771", "content": "修路 队 修 一段 公路 ， 第一天 修 了 50 米 ， 第 二 天 修 了 60 米 ， 两天 正好 修 了 这 段 公路 的 (1/20) ． 这 段 公路 全长 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4913", "content": "建造 一栋 楼房 ， 实际 投资 是 计划 的 125% ， 实际 投资 超过 计划 的 多少 % ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5234", "content": "茉织华 服装厂 有 女 工人 800 人 是 男 工人 的 4 倍 ， 女 工人 比 男 工人 多 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13925", "content": "某 5 个数 的 平均值 为 60 ， 若 把 其中 一个 数 改为 80 ， 平均值 为 70 ， 这个 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20472", "content": "一 个 两位数 乘 6 所得 的 积 ， 等于 12 * 25 的 积 ， 这个 两位数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "721", "content": "甲队 已经 铺 了 (2/7) ， 乙 队 比 甲队 多 铺 了 这块 草坪 的 (1/5) ． 甲乙 两队 合 铺 一块 草坪 ． 已经 铺 了 这块 草坪 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3783", "content": "停车场 有 54 辆 汽车 ， 里边 有 大 汽车 45 辆 ， 其余 的 是 小汽车 ， 大 汽车 的 辆数 是 小汽车 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5369", "content": "白色 调和漆 每千克 7.2 元 ， 蓝色 每千克 7.8 元 ， 黄色 每千克 7.5 元 ． 现 要 配置 淡绿色 的 漆 ， 需要 白色 的 5 千克 ， 黄色 的 1.2 千克 ， 蓝色 的 0.8 千克 ． 调 好 之后 每千克 多少 元 钱 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "2421", "content": "一 个数 加上 24 与 乘以 3 的 结果 相同 ， 那么 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10622", "content": "408 是 8 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14861", "content": "白糖 比 红糖 多 500 克 ， 红糖 比 白糖 少 (2/5) ， 白糖 有 多少 克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12187", "content": "王 大伯 饲养 了 258 只 公鸡 和 432 只 母鸡 ． 还 养 了 46 只 鸭 ． 鸡 的 只 数 是 鸭 的 多少倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13704", "content": "有 一块 青铜 ， 是 由 铜 、 锡 和 锌 3 种 金属 熔合 而 成 的 ． 其中 铜 占 总重量 的 (21/25) ， 锡 占 总重量 的 (1/20) ， 锌 占 总重量 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14571", "content": "一 部手机 816 元 ， 买 4 部手机 大约 花 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4844", "content": "池塘 的 4 周 有 一条 小路 ， 小 明 和 爸爸 一起 沿着 这 条 小路 跑步 ． 他们 从 同一 地点 出发 ， 反向而行 ， 11 秒 后 相遇 ． 如果 爸爸 每秒 跑 6 米 ， 小 明 每秒 跑 4 米 ， 这 条 小路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5085", "content": "甲 、 乙 两列 火车 同时 从 相距 700 千米 的 两地 相向 而 行 ， 甲 列车 每 小时 行 85 千米 ， 乙 列车 每 小时 行 90 千米 ， 几小时 两列 火车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11345", "content": "一 艘 客轮 从 甲 港 出发 开往 乙 港 ， 计划 每 小时 行驶 28 km ， 12.5 小时 可以 到达 ． 由于 航行 时 顺风 ， 实际 每 小时 多 行驶 7 km ， 这样 需用 几小时 到达 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17578", "content": "梨树 17 棵 ， 苹果树 是 梨树 的 3 倍 ， 一共 有 果树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10341", "content": "甲 、 乙 两 数 相差 20 ， 甲 数 与 乙 数 的 比 是 7 ： 2 ， 甲 、 乙 两 数 的 和 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15452", "content": "一 只 蝴蝶 每 小时 飞行 9.6 千米 ， 一只 蜜蜂 的 飞行速度 比 蝴蝶 的 2.4 倍 还 多 0.8 千米 ． 这 只 蜜蜂 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2159", "content": "栽 一批 树苗 ， 成活率 为 90% ， 为 保证 栽 活 360 棵 ， 至少 要 栽 树苗 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "623", "content": "一 瓶 盐水 重 1470 克 ， 其中 盐 与 水 的 比 是 1 ： 20 ． 问 盐水 中 的 盐 有 多少 克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13223", "content": "大年初一 ， 我 就 跟着 爸爸妈妈 到 爷爷奶奶 家 拜年 ． 一路上 ， 爸爸 的 车 都 是 匀速 行驶 的 ， 速度 是 大约 42.5 千米 / 时 ， 早上 7 点 出发 ， 到 爷爷奶奶 家里 ， 已经 是 9 点 了 ， 你 知道 我家 距离 爷爷奶奶 家 有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20826", "content": "一 个数 除以 35 商 是 16 ， 余数 是 15 ． 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17741", "content": "侦察员 在 破案 现场 量 得 犯罪 嫌疑人 的 鞋印 长度 为 27 厘米 ． 资料 显示 ： 成人 的 脚 的 长度 约 是 鞋 长 的 (8/9) ， 是 身高 的 (1/7) ． 这个 犯罪 嫌疑人 身高 大约 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14433", "content": "王 伯伯 按 3 ： 37 把 药液 和 水 兑 在 一起 制成 了 喷洒 剂 ， 如果 共有 喷洒 剂 160 千克 ， 那么 ， 使用 了 药液 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6881", "content": "修 一条 公路 ， 第一天 修 了 (1/8) ， 第 二 天 修 了 (2/8) ， 还 剩下 多少 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "457", "content": "一 个数 的 2.5 倍 比 5 个 0.4 大 3 ， 求 这个 数 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5678", "content": "(2/3) * (9/8) 的 积 ， 除以 (1/2) 与 (1/4) 的 差 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5286", "content": "在 一次 跳远 比赛 中 ， 小强 跳 了 3.06 米 ， 小 新 比 小强 少 跳 了 0.18 米 ， 小 宇 比 小 新 多 跳 了 0.32 米 ． 小 宇 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19499", "content": "服装厂 生产 一批 服装 ， 已经 完成 的 件数 与 剩下 的 件数 比 是 2 ： 3 ， 再生产 2400 件 就 完成 生产 任务 ． 这 批 服装 一共 有 多少 件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14385", "content": "甲 、 乙 两个 图书馆 图书 之 比 为 7 ： 5 ， 甲 馆 给 乙 馆 650 册 后 ， 甲 、 乙 两个 图书 的 比 为 3 ： 4 ， 原来 甲 馆 有 图书 多少 本 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "8806", "content": "从 (5/9) 里 减去 (2/9) ， 再 减去 (3/9) ， 差 = ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19047", "content": "某 笔 奖金 原 计划 8 人均 分 ， 先 退出 一 人 ， 其余 每人 多 得 2 元 ， 则 这笔 奖金 共有 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16792", "content": "一 本 科技 书 售价 13 元 ， 这 本书 售出 后 可以 获得 30% 的 利润 ， 这 本书 的 成本 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21437", "content": "电器 商场 计划 全年 出售 电器 20000 台 ， 实际上 半年 就 完成 了 计划 的 60% ， 按 上半年 销售 情况 估计 ， 全年 比 计划 多 销售 电器 多少 台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22425", "content": "王 畅 计划 15 天 看 完 一 本书 ． 实际 每天 看 8 页 ， 结果 推迟 3 天才 看 完 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4258", "content": "一 个 木杆 ， 第一次 截去 了 全长 的 (1/2) ， 第 二 次 截去 所剩 木杆 的 (1/3) ， 第 3 次 截去 所剩 木杆 的 (1/4) ， 第 4 次 截去 所剩 木杆 的 (1/5) ， 这时 量 得 所剩 木杆 长 为 6 厘米 ． 木杆 原来 的 长 = 多少 厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "3861", "content": "一 层楼 有 10 步 楼梯 ， 一栋 大楼 有 17 层楼 ， 这栋 大楼 只有 5 个 楼道 ． 这栋 大楼 共有 多少 步 楼梯 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8522", "content": "学校 组织 植树 活动 ， 三年级 植树 38 棵 ， 四年级 植树 的 棵 树 是 三年级 的 3 倍 ， 两个 年级 共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3937", "content": "食堂 买来 一袋 大米 ， 第一天 用 了 (3/10) ， 第 二 天 用 了 10 千克 ， 两天 共用 去 这 袋 大米 的 (2/5) ， 这 袋 大米 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15386", "content": "一 种 服装 原来 售价 200 元 ， 现在 降低 到 了 160 元 出售 ， 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22916", "content": "李老师 乘火车 从 上海 去 北京 ， 10 小时 行 了 全程 的 (5/6) ． 照 这样 的 速度 ， 从 上海 到 北京 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10069", "content": "给 货主 运 2000 箱 玻璃 ． 合同规定 ， 完好 运到 一箱 给 运费 5 元 ， 损坏 一箱 不 给 运费 ， 还要 赔 给 货主 40 元 ． 将 这 批 玻璃 运到 后 收到 运 货款 9190 元 ， 损坏 了 多少 箱 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15048", "content": "小 明 做 一道 没有 余数 的 整数 除法 时 ， 把 被除数 180 误 成 了 108 ， 结果 商 小 了 6 ． 此 题 中 的 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11387", "content": "把 一根 5 米 长 的 铁丝 平均 分成 8 段 ， 每 一段 的 长度 是 这根 铁丝 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "125", "content": "一 个 小组 有 9 个 工人 ， 同时 加工 塑料 封面 ， 平均 每人 加工 105 个 ． 把 其中 的 850 个 装 在 箱子 里 ， 还 剩下 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10690", "content": "一 个 长方形 的 周长 是 18 分 米 ， 宽 是 2 分 米 ， 那么 它 的 长 = 多少 分 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19902", "content": "69 个 气球 ， 每 3 个 气球 扎成 一束 ， 可以 扎 多少 束 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16108", "content": "学校 有 月季花 15 棵 ， 桂花 的 棵 数 是 月季花 的 (2/3) ， 又 是 牡丹花 的 (2/7) ， 牡丹花 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15193", "content": "圆形 溜冰场 的 一周 全长 200 米 ． 如果 沿着 这 一圈 每隔 10 米 安装 一盏灯 ， 一共 需要 安装 多少 盏灯 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11016", "content": "买 香蕉 2.5 千克 18 元 ， 每千克 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13208", "content": "陈老师 买 了 一套 总价 为 30 万元 的 住房 ， 要 缴纳 1.5% 的 住房 契税 ， 契税 要 缴纳 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21756", "content": "3 （ 1 ） 班 男生 占 全班 人数 的 (3/7) ， 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3396", "content": "例 1 ： 甲乙 两 人 分别 从 相距 20 千米 的 两地 同时 出发 相向 而 行 ， 甲 每 小时 走 6 千米 ， 乙 每 小时 走 4 千米 ． 两 人 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7945", "content": "甲 数 是 560 ， 乙 数 既 是 甲 数 的 (1/4) ， 又 是 丙 数 的 (2/3) ， 丙 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "649", "content": "海洋公园 平日 普通 票 价格 为 成人 80 元 / 张 ， 儿童 优惠价格 为 50 元 / 张 ， 陈老师 带 12 位 同学 去 参观 海洋公园 ， 他 最少 应该 带 多少 钱 购买 门票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11181", "content": "两列 火车 同时 从 两地 相对 开出 ， 甲 每 小时 行 56 千米 ， 乙 每 小时 行 64 千米 ． 如果 两地 相距 720 千米 需要 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18838", "content": "妈妈 用 高压锅 蒸 米饭 需 10 分钟 ， 洗菜 需 3 分钟 ， 炒菜 需 8 分钟 ， 妈妈 最快 需用 多少 分钟 可以 让 家人 吃 上 饭 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "818", "content": "某 商品 降价 1000 元 后 ， 售价 4000 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9970", "content": "中国 在 2008 年 的 奥运会 上 获得 51 枚 金牌 ， 美国 获得 了 36 枚 ， 美国 获得 的 金牌数 是 中国 获得 金牌数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8529", "content": "有 两辆 火车 ， 车长 分别 是 125 米 和 115 米 ， 车速 分别 是 22 米 / 秒 和 18 米 / 秒 ， 两车 相向 行驶 ， 从 两车 车头 相遇 到 车尾 分开 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17729", "content": "甲 数 是 240 ， 比 乙 数 的 80% 少 20 ， 求 乙 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22823", "content": "为了 改善 交通 ， 方便 居民 ， 政府 将 维修 一条 540 米 长 的 路 ， 原 计划 15 天 修 完 ， 实际 提前 3 天 修 完 ， 实际 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10678", "content": "小 丹 看 一本 故事书 ， 上午 看 了 全书 的 (2/9) ， 下午 比 上午 多 看 了 全书 的 (1/9) ． 这 一天 共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8690", "content": "古 丽 米 热 看 一本 70 页 的 书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (2/7) ， 还 剩 多少 页 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "16617", "content": "书架 上层 有 6 本 不同 的 数学 书 ， 下层 有 5 本 不同 的 语文 书 ， 若 任意 从 书架上 取 一本 数学 书 和 一本 语文 书 ， 有 多少 种 不同 的 取法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3704", "content": "水果 批发部 运 来 9 筐 梨 ， 恰好 是 运 来 苹果 的 (1/4) ， 运 来 的 苹果 是 桔子 的 (9/7) 倍 ， 求 运 来 桔子 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6593", "content": "学校 图书室 有 故事书 400 本 ， 连环画 是 故事书 的 (5/8) ， 作 文书 是 连环画 的 (3/5) ， 作 文书 有 多少 本 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17685", "content": "5 、 六年级 参加 植树 活动 ， 五年级 学生 植树 120 棵 ， 六年级 植树 的 棵 数 比 五年级 的 2 倍 多 40 棵 ， 六年级 植树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22624", "content": "甲 、 乙 两 人 要 加工 60 个 零件 ， 上午 甲 加工 了 这 批 零件 的 (1/4) ， 乙 加工 了 这 批 零件 的 (1/3) ， 甲 、 乙 两 人 上午 共 加工 了 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19011", "content": "小 娟 加印 了 14 张 照片 ， 每张 照片 0.55 元 ， 她 一共 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19622", "content": "学校 里 有 240 棵 柏树 ， 是 香 樟树 的 2 倍 少 16 棵 ， 香 樟树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13616", "content": "农具厂 计划 生产 1378 件 小 农具 ， 已经 生产 了 10 天 ， 每天 生产 91 件 ， 剩下 的 要 4 天 完成 ， 平均 每天 应 做 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3446", "content": "有 两列 火车 ， 一列 长 102 米 ， 每秒 行 20 米 ． 另 一列 长 120 米 ， 每秒 行 17 米 ． 两车 相对 而 行 ， 从 车头 相遇 到 车尾 相 离 ， 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11150", "content": "小朋友 在 操场上 做操 ， 小 俊 站 在 左边 第 3 行 、 右边 第 8 行 ； 假如 从前 往后 数 小 俊 是 第 6 个 ， 从 后 往前 数 小 俊 是 第 7 个 ． 如果 每行 的 人数 相同 ， 那么 一共 有 多少 个 小朋友 在 做操 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "6269", "content": "妈妈 带 了 50 元 钱 去 买 苹果 ， 她 买 了 5 千克 苹果 ， 找回 了 9.2 元 钱 ． 妈妈 买 的 苹果 每千克 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10022", "content": "李老师 打 一篇 文章 ， 已经 打 了 900 个 字 ， 还 剩 (2/5) 没 打 完 ． 这 篇文章 一共 有 多少 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22671", "content": "饲养场 有 鸡 5600 只 ， 鸭子 的 只 数 比 鸡 的 只 数 少 (3/7) ， 饲养场 养鸭 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17521", "content": "一 个数 的 25% 是 12 ， 这个 数 的 15% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8701", "content": "一 根 方 钢 长 16 分 米 ， 横截面 积 是 8 平方分米 的 正方形 ， 这根 方 钢 的 体积 = 多少 立方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5471", "content": "要 修 一条 路 ， 甲队 先 修 了 全长 的 (1/20) ， 乙 队 又 修 了 全长 的 6% ， 甲队 比 乙 队 少 修 了 8 米 ， 两队 共 修 了 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21389", "content": "一 本书 有 80 页 ， 飞 飞 看 了 它 的 (3/8) ， 还 剩下 全书 的 几分 之 几 没 看 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10770", "content": "一 个 药瓶 的 标签 上 写 着 ： 0.2 mg （ 毫克 ） * 60 粒 ， 用量 ： 每天 3 次 ， 每次 0.4 mg ， 5 天 一个 疗程 ． 这 瓶 药 可以 服用 多少 个 疗程 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22154", "content": "电视机厂 4 月份 前 10 天 共 生产 电视机 3300 台 ． 后 20 天 共 生产 电视机 6300 台 ． 这个 月 平均 每天 生产 电视机 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "126", "content": "一 批 货物 共 120 吨 ， 已经 运走 了 45 吨 ， 剩下 的 要求 5 次 运 完 ， 平均 每次 运 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3922", "content": "一 条 路 长 137 米 ， 修 了 21 天 后 ， 还 余 11 米 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13653", "content": "服装厂 要 加工 3600 套 服装 ， 计划 10 天 完成 ． 实际 每天 多 加工 120 套 ， 完成 这 批 服装 的 加工 任务 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12257", "content": "五年级 植树 120 棵 ， 六年级 植树 是 五年级 的 80% ， 六年级 植 了 多少 棵 树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21027", "content": "一 条 公路 ， 已修 200 米 ， 未 修 的 与 公路 总长 的 比 是 4 ： 9 ， 这 条 公路 还有 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2021", "content": "果园 里 有 杏树 400 棵 ， 梨树 的 棵 数 比 杏树 多 25% ， 果园 里 有 多少 棵 梨树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "720", "content": "一 个数 的 2 倍 比 2.5 * 6 的 积 多 5 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11106", "content": "甲 、 乙 两 数 的 比 是 4 ： 5 ， 求 乙 比 甲 多几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10528", "content": "小 红 身高 (8/7) 米 ， 刚好 是 小 丽 的 (5/4) ， 小强 的 身高 是 小 丽 的 (5/7) ， 小强 身高 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10909", "content": "4 * (7/12) 的 积 ， 再 加上 (2/3) ， 所得 的 和 除以 (3/2) ， 商 = ？ （ 列出 综合 算式 ）", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "560", "content": "在 一个 除法 算式 里 ， 商 和 除数 相乘 的 积 是 2400 ， 余数 是 15 ， 被除数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8804", "content": "计划 将 一块 地 的 (6/7) 用于 种草 ， (1/7) 用于 植树 ， 植树 的 地面 比 种草 的 地面 少 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14481", "content": "赵老师 的 讲 桌上 有 红 粉笔 16 枝 ． 白粉笔 的 枝 数 是 红 粉笔 的 (5/4) ， 又 是 蓝 粉笔 的 (10/11) ． 蓝 粉笔 有 多少 枝 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11256", "content": "一 个 直角三角形 周长 是 26 cm ， 两条 直角 边长 是 8 厘米 和 5.5 cm ， 斜边 长 多少 厘米 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21895", "content": "一 辆 汽车 以 每 小时 85 千米 的 速度 从 甲地 到 乙地 ， 12 小时 后 距 乙地 还有 36 千米 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19408", "content": "a 、 b 两地 相距 90 千米 ， 甲 、 乙 两 人 同时 从 a 、 b 两地 相向 而 行 ， 甲 每 小时 行 18 千米 ， 相当于 乙 每 小时 所 行 路程 的 (2/3) ， 经过 几小时 甲 、 乙 两 人 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16347", "content": "前进 管理区 去年 平均 每 公顷 香蕉 收入 48000 元 ， 今年 增收 (1/10) ， 今年 平均 每 公 倾 香蕉 收入 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8627", "content": "某 生产 小组 生产 一批 零件 ， 前 6 天 生产 180 个 ， 照 这样 计算 ， 又 生产 了 15 天 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19049", "content": "甲乙 两 仓 共有 粮食 2400 袋 ， 甲 仓 运进 一批 粮食 后 ， 比 它 原有 的 粮食 增加 了 8% ， 乙 仓 运出 169 袋 ， 现在 甲乙 两 仓 一共 有 粮食 2359 袋 ， 甲 仓 原有 粮食 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1532", "content": "图书室 买 了 5 套 《 十 万个 为什么 》 丛书 ， 每套 280 元 ， 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7440", "content": "甲 数 比 乙 数 的 3.4 倍 多 3 ， 已知 甲 数 是 20 ， 求 乙 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18877", "content": "成人 的 头部 长度 约 占 身高 的 (1/8) ， 张老师 的 身高 是 176 cm ， 张老师 头部 的 长度 约 = 多少 cm ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2848", "content": "一 条 水渠 长 1120 米 ， 每天 修 75 米 ， 修 了 12 天 后 ， 还 剩 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14959", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 10 小时 行 了 全程 的 (5/6) ． 照 这样 计算 ， 余下 的 路程 还 需要 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20073", "content": "0.78 里面 有 多少 0.01 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7520", "content": "小 红 在 看 一本 故事书 ， 计划 每天 看 20 页 ， 实际 每天 比 计划 多 看 了 (3/10) ， 实际 每天 多 看 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4150", "content": "两个 因数 的 积 是 96.64 ， 一个 因数 是 32 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "42", "content": "篮球 的 数量 比 足球 多 (1/4) ， 篮球 的 数量 是 足球 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16677", "content": "赵 群 今年 5 月 1 日 把 1000 元 存入 银行 ， 定期 整存整取 一年 ， 如果 年利率 按 3.06% 计算 ， 利息税 按 5% 计算 ， 到期 时 他 可以 取出 本金 和 税后 利息 共 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "1545", "content": "一 桶 油 重 2 千克 ， 倒 出 (1/3) 后 ， 再 灌进 (1/2) 千克 ， 这时 = 多少 千克 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6560", "content": "水果店 张 大叔 带 900 元 钱 去 批发市场 买 苹果 ， 买 了 25 箱 ， 还 剩 150 元 ． 每箱 苹果 的 批发价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19805", "content": "修 一段 450 米 的 路 ， 已经 修 了 (4/9) ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1912", "content": "福林 小学 有 女生 480 人 ， 相当于 全校学生 人数 的 (4/7) ． 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8426", "content": "三年级 （ 1 ） 班 有 46 人 ， 其中 21 人 是 女生 ， 男生 比 女生 多 多少 人 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17740", "content": "350 - 80 的 差 ， 再 除以 3 ， 商 = ？ 列 算式 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5146", "content": "一 批 布 原 计划 做 服装 1800 套 ， 由于 每套 节约 用布 0.2 米 ， 结果 多 做 了 100 套 ， 现在 每套 用布 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2794", "content": "一 个 盒子 里 有 多少 个 红球 ， 8 个 白 球 ， 随便 摸 出 一个 球 ， 摸 到 红球 的 可能性 是 (2/3) ， 摸 到 白 球 的 可能性 是 (1/3) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3806", "content": "从 学校 步行 到 体育馆 ， 小 明 花 了 (3/4) 小时 ， 小 青 比 小 明 少 花 (1/5) 小时 ， 小 王 比 小 青 多 花 了 (1/15) 小时 ． 小 王 花 了 多少 时间 到达 体育馆 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "815", "content": "720 节电池 ， 每 9 节 装 一盒 ， 5 盒装 一箱 ． 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22715", "content": "赵 叔叔 用 510 元 买 6 箱 瓷砖 装饰 厨房 ， 结果 还 差 2 箱 ． 他 还要 准备 多少 钱 去 买 瓷砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14459", "content": "果园 里 有 桃树 240 棵 ， 杏树 252 棵 ， 杏树 比 桃树 的 棵 数多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18704", "content": "陈老师 出版 了 一本 《 小学 数学 总 复习 》 ， 获得 稿费 5000 元 ， 按规定 ， 超出 3500 元 的 部分 应 缴纳 14% 的 个人所得税 ． 陈老师 应 交税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23156", "content": "某 农场 挖 一条 水渠 ， 第一天 挖 了 92.6 米 ， 第 二 天 比 第一天 少 挖 8.56 米 ， 这 两天 共 挖 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5812", "content": "小 明 买 足球 和 篮球 共用 了 65.76 元 ， 已知 买 足球 用 了 42.86 元 ， 买 篮球 用 了 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10602", "content": "李 明 今年 身高 150 厘米 ， 比 妈妈 矮 (1/16) ， 妈妈 身高 多少 厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16607", "content": "红星 机械厂 5 台 机床 8 天 生产 零件 1800 个 ， 一台 机床 一天 生产 零件 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3452", "content": "果园 有 苹果树 150 棵 ， 梨树 比 苹果树 多 20 棵 ， 橘子 树 的 棵 数 是 苹果树 和 梨树 总 棵 数 的 2 倍 ． 橘子 树 = 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18555", "content": "有 一段 长 80 米 的 街道 一旁 安装 路灯 ， 街道 的 两端 都 要 安装 ， 中间 每隔 8 米 安装 一盏 ， 这 段 街道 一旁 要 安装 多少 盏 路灯 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12523", "content": "四年级 有 男生 286 人 ， 女生 265 人 ． 其中 有 176 名 同学 报名 参加 了 长跑 ， 有 多少 名 同学 没有 报名 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7116", "content": "两个 因数 的 积 是 156.48 ， 其中 一个 因数 是 48 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4773", "content": "小 亚 看 一 本书 ， 第一天 看 了 全书 的 (3/8) ， 第 二 天 看 了 全书 的 (2/8) ， 两天 一共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9445", "content": "一 座 宿舍 的 走廊 长 15 米 ， 插 有 6 面 彩旗 ， 走廊 两端 都 要 插 ． 照 这样 计算 ， 办公大楼 走廊 长 27 米 ， 要 插 多少 面 彩旗 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10972", "content": "把 一堆 皮球 分装 在 4 个 盒子 中 ， 其中 (1/5) 放入 甲 盒 ， (1/3) 放入 乙 盒 ， 放入 丙 盒 的 皮球 是 甲 、 乙 两盒 皮球 总数 的 (3/4) ， 丁 盒 放入 10 个 皮球 ， 这 堆 皮球 共 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "433", "content": "168 个 女同学 和 48 个 男同学 参加 团体操 表演 ， 每 8 个 同学 排成 一行 ， 可以 排成 几行 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17184", "content": "某校 数学 课外活动 组 ， 每组 8 人 ， 后 因 工作 需要 ， 又 重新 编组 ， 每组 改为 12 人 ， 因此 减少 了 2 组 ． 问 该校 共有 多少 人 参加 数学 课外活动 组 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17827", "content": "李 阿姨 买 了 5 千克 苹果 ， 苹果 的 售价 是 3.2 元 / 千克 ， 王 阿姨 付出 20 元 后 ， 应该 找回 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5352", "content": "李老师 买 4 本 《 童话 大王 》 付 了 100 元 ， 营业员 阿姨 找 给 他 36 元 ． 每 本 《 童话 大王 》 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4807", "content": "李老师 写 了 3 篇 科普 故事 ， 得 稿费 3400 元 ， 超出 800 元 以上 的 部分 按 14% 缴纳 个人所得税 ， 李老师 应 缴税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2363", "content": "商店 里 运 来 一批 皮鞋 ， 上 半月 卖出 总数 的 (1/3) ， 下半月 卖出 总数 的 (2/5) ， 还 剩下 64 双 没有 卖完 ， 这 批 鞋 一共 有 多少 双 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9679", "content": "龙 博士 开车 到 “ 彩色 城 ” 购买 玩具 ， 因 途中 一路 段 正在 抢修 而 将 车速 降低 了 (1/5) ． 那么 ， 龙 博士 在 路上 的 时间 增加 了 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "680", "content": "一 个 房地产 开发商 计划 把 (5/2) 公顷 的 地 分成 每 (1/4) 公顷 的 小 块 地 ， 可以 分成 多少 块 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6966", "content": "两个 加数 的 和 是 10.3 ， 其中 的 一个 加数 是 4.8 ， 另 一个 加数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20292", "content": "一 个 口袋 里 装 了 4 支 红 铅笔 、 6 支 蓝 铅笔 ， 从 这个 口袋 里 任意 摸 出 一支 铅笔 ， 摸 到 红 铅笔 的 可能性 是 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19763", "content": "施工队 修 一条 169 米 长 的 公路 ， 已经 修好 了 全长 的 (5/13) ， 已经 修好 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17366", "content": "180 比 一个 数 的 50% 多 10 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17978", "content": "等腰三角 形 的 周长 50 厘米 ， 已知 一条 腰 与 底 的 比 是 3 ： 4 ． 求 底 的 长度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9417", "content": "一 辆 汽车 从 甲 城 开 到 乙 城 ， 用 了 5 小时 ， 速度 为 30 千米 / 时 ， 返回 时 ， 只用 了 3 小时 ， 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11556", "content": "机械厂 计划 在 16 天 内 生产 零件 6120 个 ， 前 6 天 平均 每天 制造 420 个 ， 革新 技术 后 ， 平均 每天 生产 了 450 个 ， 照 这样 计算 ， 这 批 任务 可 提前 几天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17528", "content": "把 一个 棱 长 5 厘米 的 正方体 木块 放在 桌面上 ， 占 桌面 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2553", "content": "某班 有 学生 45 人 ， 其中 男生 占 40% ， 女生 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2445", "content": "一 桶 油 连 桶 共 重 9.8 千克 ， 倒 出 一半 油 以后 ， 连 桶 还 重 5.4 千克 ， 桶 重 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16547", "content": "小 红 在 书店 想 买 一本 原价 15 元 的 书 ， 现在 打 0.6 出售 ． 小 红 买 这 本书 便宜 了 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11097", "content": "教师 出 了 两道 思考题 给 全班同学 做 ， 结果 做 对 第一 题 的 有 26 人 ， 做 错 第 二 题 的 有 18 人 ， 两 题 都 做 对 的 有 12 人 ， 那么 两 题 都 做 错 的 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7188", "content": "某班 有 50 人 ， 会 游泳 的 有 27 人 ， 会 体操 的 有 18 人 ， 都 不会 的 有 15 人 ． 那么 既 会 游泳 又 会 体操 的 有 几 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4498", "content": "一 袋 大米 25 千克 ， 已经 吃 了 它 的 (2/5) ， 吃 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9119", "content": "把 3 块 棱 长 都 是 4 cm 的 正方体 木块 拼成 一个 长方体 ， 这个 长方体 的 表面积 比 原来 3 个 正方体 的 表面积 减少 了 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11306", "content": "比 的 前项 是 60 ， 后 项 = ， 比值 是 15 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22101", "content": "一 件 衣服 以 120 元 卖出 ， 可 赚 20% ， 如果 要 赚 40% ， 应 定价 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18434", "content": "现在 有 32 盆花 ， 如果 摆在 4 个 花坛 里 ， 每个 花坛 里 可以 摆 几盆 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8214", "content": "两艘 轮船 分别 从 武汉 （ 甲 ） 、 上海 （ 乙 ） 同时 相对 开出 ， 经过 23.5 小时 相遇 ， 甲 每 小时 行 23 千米 ， 乙 每 小时 行 20 千米 ． 问 武汉 到 上海 相距 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11336", "content": "修 一条 堤坝 ， 甲队 修 了 全长 的 (5/12) ， 正好 是 360 米 ， 乙 队 修 了 全长 的 (1/3) ， 乙 队 修 了 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14685", "content": "一 堆 煤 ， 用 去 30 吨 ， 还 剩 (1/3) ， 原有 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6625", "content": "5 得利 面粉厂 有 83 吨 面粉 要 调往 灾区 ， 用 一辆 载重 9 吨 的 货车 来 运 ， 已经 运 了 6 趟 ． 再 运 多少 吨 才能 全部 运 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5398", "content": "欢欢 有 365 元 ， 比 明明 少 35 元 ， 他俩 共有 多少 元 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9926", "content": "孙 明 买 了 4 支 铅笔 ， 付给 售货员 10 元 钱 ， 找回 6.8 元 ， 每支 铅笔 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8745", "content": "在 今年 的 “ 献爱心 ” 活动 中 ， 三年级 6 个 班 共 捐书 900 本 ， 其中 5 个 班 各 捐 了 145 本 ， 另 一个班 捐 了 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19949", "content": "果园 里 有 56 棵 苹果树 ， 梨树 的 棵 数 是 苹果树 的 (7/8) ， 梨树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18126", "content": "去年 植树 3600 棵 ， 今年 比 去年 多 植 (1/4) ， 今年 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6488", "content": "一 辆 汽车 4 小时 行 了 320 千米 ， 照 这样 的 速度 ， 再行 2 小时 就 能 到达 终点 ， 这辆 汽车 到达 终点 时 ， 一共 行 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10918", "content": "食堂 买 了 2700 千克 白菜 ， 其中 的 (2/5) 运到 食堂 ， 吃 了 运 来 的 (1/3) ， 吃 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6434", "content": "师徒 两 人 合作 生产 一批 零件 ， 师傅 每 小时 生产 40 个 ， 徒弟 每 小时 生产 30 个 ， 完成 任务 时 徒弟 正好 生产 了 450 个 ， 这 批 零件 共 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20801", "content": "25 个 40 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10454", "content": "某 小学 六年级 有 男生 60 人 ， 男生 人数 是 女生 人数 的 (4/5) ． 女生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15621", "content": "在 参加 长岭县 运动会 活动 中 ， 某 年级 参加 走 方队 的 女生 占 全年 级 总 人数 的 (1/6) ， 参加 走 方队 的 男生 占 全年 级 学生 总 人数 的 (1/4) ， 已知 方队 中 男生 比 女生 多 6 人 ， 这个 年级 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16584", "content": "甲 、 乙 两站 相距 354 千米 ， 一列 客车 和 一列 货车 同时 从 两站 相对 开出 3 小时 后 两车 相遇 ， 已知 客车 每 小时 行 62 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22783", "content": "2008 年 5 月 妈妈 将 1000 元 存入 银行 ， 定期 一年 ， 年利率 为 4.14% ， 到期 后 银行 将 扣除 5% 的 利息 所得税 ． 到期 后 妈妈 实 得 利息 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4173", "content": "华 地 百货 某种 空调 原价 2500 元 ， 现 0.8 出售 ， 现在 每 台 只要 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2786", "content": "乒乓球队 有 队员 40 人 ， 田径队 人数 相当于 乒乓球队 人数 的 (5/4) ， 游泳队 的 人数 是 田径队 的 (3/5) ． 游泳队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18351", "content": "一 双 运动鞋 打 0.75 后 ， 比 原价 便宜 35 元 ， 运动鞋 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4582", "content": "白猫 上周 钓 了 128 条 鱼 ， 白猫 钓 的 比 花猫 多 14 条 ． 花猫 在 上 一周 钓 了 多少 条 鱼 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19756", "content": "小强 特别 喜欢 看 《 少儿 百科全书 》 ， 他 4 天 看 了 120 页 ， 像 这样 又 看 了 20 天 ， 才 把 这 本书 看 完 ． 这 本书 一共 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8273", "content": "李 芬 同学 是 集邮 爱好者 ， 她 收集 的 邮票 中 ， 动物 邮票 有 80 张 ， 比 人物 邮票 多 25% ， 人物 邮票 有 多少 张 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16038", "content": "一 个 平行四边形 的 面积 是 120 平方米 ， 高 是 5 米 ， 底 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6083", "content": "用 边长 5 分 米 的 正方形 铁皮 围成 一个 圆柱形 通风管 （ 接头处 不计 ） ． 这个 通风管 的 侧 面积 最大 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17970", "content": "学校 举行 美术 作品展览 ． 一 、 二年级 各 展出 48 幅 ， 三年级 展出 的 图画 是 一 、 二年级 总数 的 3 倍 ． 三年级 展出 多少 幅 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12198", "content": "一 桶 油 ， 第一次 用 去 (1/5) ， 第 二 次 比 第一次 多用 去 20 千克 ， 还 剩下 16 千克 ， 这 桶 油 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19193", "content": "针织厂 原 计划 20 天 生产 运动衫 18000 套 ， 实际 每天 比 计划 多 生产 100 套 ， 实际 可比 计划 提前 多少 天 完成 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5746", "content": "校园 里 有 一个 直径 是 16 m 的 圆形 水池 ， 工人 叔叔 要 沿着 水池 铺设 一圈 2 m 宽 的 石子 小路 ， 这 条 小路 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "-", "/", "^"], "difficulty": 0.7, "length": 17}
-{"question_id": "17486", "content": "新华 农场 修 一条 长 7.45 千米 的 水渠 ， 已经 修 了 5 天 ， 每天 修 0.65 千米 ， 剩下 的 要 7 天 修 完 ． 剩下 的 平均 每天 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3719", "content": "中心小学 三年级 一共 有 26 人 ， 参加 语文 兴趣小组 的 有 14 人 ， 参加 数学 兴趣小组 的 有 20 人 ， 那么 既 参加 语文 兴趣小组 又 参加 数学 兴趣小组 的 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4857", "content": "每张 电脑桌 是 120 元 ， 学校 一共 买 了 32 张 ． 已付 订金 900 元 ， 还 应 再 付 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8474", "content": "小 丽 折 了 26 只 纸鹤 ， 小 华 比 小 丽 多 折 5 只 ， 小 英 折 的 只 数 正好 是 小 华 的 2 倍 ． 小 英 折 了 多少 只 纸鹤 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5971", "content": "某 商品 第一次 降价 20% ， 第 二 次 又 降价 10% ， 现价 是 423 元 ， 这个 商品 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6592", "content": "妈妈 骑 电动车 从 甲 镇 到 乙 镇 用 了 2 小时 ， 每 小时 行 15 千米 ， 返回 时 用 了 3 小时 ， 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18021", "content": "我国 约 有 660 个 城市 ， 其中 约 有 (2/3) 的 城市 供水 不足 ， 全国 供水 不足 的 城市 大约 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19621", "content": "建 一个 游泳池 ， 要 挖 一个 长 50 米 ， 宽 20 米 ， 深 1.5 米 的 坑 ． 挖土机 每 小时 可 挖土 25 立方米 ， 如果 每天 工作 8 小时 ， 多少 天 可以 挖 完 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13072", "content": "食堂 买来 2800 千克 煤 ， 20 天 正好 烧 完 ， 平均 每天 烧 多少 千克 煤 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11491", "content": "甲 、 乙 两 人 同时 从 ab 两地 相向 而 行 ， 当 甲 行 了 全程 的 (1/5) 时 ， 乙 行 了 42 千米 ； 当 甲 行 完全 程 时 ， 乙 行 了 全程 的 (6/7) ． 求 ab 全程 的 长 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20590", "content": "妈妈 去 一家 商场 买 一套 新 衣服 ， 买 一条 裤子 花 了 80 元 ， 是 一件 上衣 的 (4/7) ． 买 这 套 衣服 共 需 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17669", "content": "妈妈 为 小宝 做 早餐 ， 她 准备 了 2 片 8 毫米 厚 的 面包 ， 又 在 中间 夹 了 一个 约 厚 6 毫米 的 煎蛋 ． 这份 早点 一共 有 多 厚 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "383", "content": "外贸公司 计划 全年 盈利 300 万元 ， 实际 今年 盈利 360 万元 ， 今年 的 实际 盈利 额 将 超过 计划 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9201", "content": "有 544 棵 杨 数 ， 平均 每天 栽 35 棵 ， 最后 还 剩 19 棵 ， 一共 栽 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22770", "content": "同学 们 去 参观 展览 ． 一年级 有 48 人 ， 二年级 比 一年级 多 16 人 ， 比 三年级 少 20 人 ． 三年级 有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11604", "content": "某 超市 新 购进 12 箱 洗洁精 ， 每箱 28 瓶 ， 这家 超市 一共 购进 洗洁精 多少 瓶 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2118", "content": "希望 小学 扩建 教学楼 ， 原 计划 投资 56 万元 ， 实际 投资 比 原 计划 节约 了 (1/7) ， 实际 投资 了 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5058", "content": "一 批 树苗 ， 五年级 （ 1 ） 班 第一天 栽 了 全部 的 (1/5) ， 第 二 天 比 第一天 多 栽 了 全部 的 (1/20) ， 还 剩下 全部 的 几分 之 几 没有 栽 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20847", "content": "张老师 编写 了 一本 《 数字 童话 》 ， 得到 稿费 3800 元 ． 按规定 ， 一次 稿费 超过 800 元 的 部分 ， 应该 以 14% 的 税率 纳税 ． 张老师 实际 得到 稿费 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8995", "content": "甲乙 两 码头 相距 560 千米 ， 一只 船 从 甲 码头 顺水 航行 20 小时 到达 乙 码头 ， 已知 船 在 静 水中 每 小时 行驶 24 千米 ， 问 这 船 返回 甲 码头 需 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2136", "content": "新 农民 水果 站 运 来 600 千克 苹果 ， 卖出 350 千克 后 ， 又 运进 287 千克 ， 现在 水果店 有 水果 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2049", "content": "有 一箱 矿泉水 ， 平均 分给 7 个 小组 ， 每 组分 到 4 瓶 ， 箱子 里 还有 2 瓶 ， 这 箱 矿泉水 一共 有 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17496", "content": "水果店 有 水果 750 千克 ， 今天上午 卖出 284 千克 ， 下午 卖出 325 千克 ． 水果店 还 剩 多少 千克 水果 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17779", "content": "学校 科学 兴趣小组 的 人数 是 体育 兴趣小组 的 (3/5) ， 文艺 兴趣小组 的 人数 是 体育 兴趣小组 的 (2/5) ， 那么 ， 文艺 兴趣小组 的 人数 是 科学 兴趣小组 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12558", "content": "修 一条 水渠 ， 甲 单独 做 3 天 可以 完成 (1/5) ， 乙 队 单独 做 2 天 可以 完成 (1/10) ， 照 这样 做 ， 甲乙 两队 合作 多少 天 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7984", "content": "有 槐树 1500 棵 ， 杨树 的 棵 数 是 槐树 的 (2/3) ， 又 是 柳树 的 (2/7) ， 柳树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2979", "content": "劳 技 课 中 同学 分成 两组 做 红花 ， 第一组 5 人 ， 平均 每人 做 了 17 朵 ； 第 二 组 6 人 共 做 了 78 朵 ， 劳 技 课 中 这 两组 同学 一共 做 了 多少 朵 红花 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21006", "content": "甲 、 乙 两地 相距 48 千米 ， 一 船 顺流 由 甲地 去 乙地 ， 需 航行 3 小时 ； 返回 时间 因雨 后 涨水 ， 所以 用 了 8 小时 才 回到 乙地 ， 平时 水速 为 4 千米 ， 涨水 后 水速 增加 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16334", "content": "今年 小 华 和小红 的 年龄 和 是 22 岁 ， 3 年前 小 华 比 小 红 大 2 岁 ， 小 红 今年 多少岁 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16768", "content": "学校 买 了 120 套 课桌椅 ， 每张 桌子 75 元 ， 每 把 椅子 50 元 ， 买 课桌椅 一共 花 了 多少 元 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4191", "content": "学校 田径队 有 男队员 36 人 ， 男队员 人数 是 女队员 的 4 倍 ． 学校 田径队 共有 队员 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2934", "content": "一 条 公路 ， 第一天 ， 修 了 200 米 ， 还 剩下 95% 没有 修 ， 这 条 公路 有 多长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17889", "content": "小 刚读 一 本书 ， 第一天 读 了 全书 的 40% ， 第 二 天 读 了 余下 的 (5/9) ， 还 剩下 32 页 未 读 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17338", "content": "全世界 有 桦 数 40 种 ， 我国 的 桦树 的 种类 占 其中 的 (11/20) ， 我国 有 多少 种 桦树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7068", "content": "在 45 米 长 的 跑道 上 ， 每隔 5 米 插 一面 红旗 ， 从头到尾 共 插 了 多少 面 红旗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13083", "content": "学校 组织 了 一次 “ 迎 世博 ” 知识 竞赛 ， 初赛 共有 40 道 选择题 ， 竞赛 规则 规定 ： 每题 选 对 得 4 分 ， 选错 或 不 选 倒扣 3 分 ． 已知 小 明 得 了 62 分 ， 问 ： 小 明 答对 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15131", "content": "平行四边形 的 底 是 12 cm ， 高 是 7 cm ， 与 它 等 底 等 高 的 三角形 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8941", "content": "小 刚 家 去年 用电 960 度 ， 今年 计划 节约 (1/12) ， 今年 计划 用电 多少度 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10679", "content": "两个 城市 间 的 公路 长 418 千米 ． 甲乙 两辆 汽车 同时 从 两个 城市 出发 ， 相向 而 行 ， 经过 5.5 小时 相遇 ． 甲 车 每 小时 行 36 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6215", "content": "一 个数 的 3.4 倍 是 10.71 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18768", "content": "甲 仓库 存粮 240 袋 ， 相当于 乙 仓库 存粮 的 (4/5) ， 甲乙 仓库 一共 存粮 多少 袋 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22716", "content": "一 艘 轮船 从 a 港 开往 b 港 ， 每 时 航行 29 千米 ， 航行 了 16 时 后 离 b 港 还有 38 千米 ． a 、 b 两 港 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8759", "content": "一 个 长方体 纸盒 长 30 厘米 ， 宽 28 厘米 ， 高 18 厘米 ． 如果 每块 长 14 厘米 ， 宽 6 厘米 ， 高 2 厘米 的 肥皂 摆放 在 纸盒 中 ， 这个 纸盒 最 多 装 多少 块 肥皂 ？", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11869", "content": "图书室 里 有 科技 书 和 文艺 书 共 630 本 ， 两种 书 的 比 是 1 ： 4 ， 又 买来 一些 科技 书 ， 这时 科技 书 与 文艺 书 的 比 是 3 ： 7 ， 买来 的 科技 书 有 多少 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "8923", "content": "服装厂 计划 生产 850 套 学生服 ， 已经 生产 了 5 天 ， 每天 生产 30 套 ． 剩下 的 要 在 20 天 内 完成 ， 平均 每天 要 生产 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6698", "content": "吴 老师 用 400 元 买 了 1 双 鞋 和 2 条 相同 价格 的 裙子 ， 其中 鞋 168 元 ， 一条 裙子 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3526", "content": "一 根 铁丝 用 去 3 米 后 ， 用 去 的 与 剩下 的 比 是 1 ： 4 ， 这根 铁丝 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4252", "content": "一 种 商品 打 0.7 后 是 便宜 39 元 ， 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1316", "content": "一 共 1800 本 ， 我们 六年级 分 得 (2/9) ， 分给 五年级 的 本 数 相当于 六年级 的 (4/5) ， 五年级 分 得 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13437", "content": "28 ^ 2 - 83.5 = ．", "knowledge": ["-", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "7887", "content": "商店 运 来 一批 水果 ， 其中 有 香蕉 375 千克 ， 有 橘子 500 千克 ． 每 25 千克 装 一筐 ， 香蕉 比 橘子 少 几 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14475", "content": "小 莲 计划 用 10 天 看 完 一本 502 页 的 故事书 ， 实际上 前 4 天 平均 每天 只 看 43 页 ． 如果 要 按期 把 书 看 完 ， 以后 平均 每天 要 看书 几页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2712", "content": "上海 服装厂 去年 计划 生产 服装 2.4 万套 ， 实际 生产 了 2.76 万套 ． 实际 比 计划 增加 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22841", "content": "粮店 运 来 大米 250 吨 ， 卖出 一些 后 ， 还 剩下 90 吨 ． 一共 卖出 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17733", "content": "某 工厂 5 月份 烧煤 120 吨 ， 相当于 原 计划 的 (8/9) ， 原 计划 烧煤 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4055", "content": "56 吨 的 75% = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3824", "content": "商店 购进 红布 15 匹 ， 每匹 145 米 ， 购进 蓝布 32 匹 ， 每匹 120 米 ． 这个 商店 一共 购进 布料 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6053", "content": "某 钢铁厂 8 月份 生产 钢铁 2460 吨 ， 比 计划 增产 60 吨 ， 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21906", "content": "津南区 要 为 汶川 地震 灾区 运送 200 吨 救灾物资 ， 第一次 运走 总数 的 40% ， 第 二 次 运走 50 吨 ， 还 剩下 多少 吨 救灾物资 等待 运走 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7327", "content": "一 种 画册 原价 每 本 6.9 元 ， 现在 每 本 按 原价 的 0.7 出售 ， 这种 画册 每 本 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1843", "content": "一 条 损坏 的 公路 长 24 千米 ， 甲 、 乙 两个 工程队 同时 从 两端 修 这 条 路 ， 甲队 平均 每天 修 1.2 千米 ， 乙 队 平均 每天 修 1.8 千米 ． 多少 天 可以 修 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12219", "content": "工厂 进 了 一批 原料 ， 第一个 星期 用 去 总数 的 (2/5) ， 第 二 个 星期 用 去 总数 的 (4/9) ， 这时 用 去 的 比 剩下 的 多 31 吨 ， 这 批 原料 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9057", "content": "修 一条 路 ， 第一周 修 全长 的 (3/7) ， 第 二 周 修 的 是 第一周 修 的 (1/3) ， 这时 还 剩 60 千米 ， 这 条 路 全长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6143", "content": "某 服装厂 原 计划 每天 生产 200 套 西服 ， 30 天 完成 任务 ， 实际 每天 比 原 计划 多 生产 100 套 ， 这样 完成 任务 需要 几天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18619", "content": "工人 师傅 要 装配 1200 辆 自行车 ， 3 天 装配 了 450 辆 ． 照 这样 计算 ， 余下 的 还要 几天 才能 装完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9746", "content": "李老师 把 30000 元 以 整存整取 的 方式 在 银行 存 5 年 ， 年利率 为 3.6% ， 李老师 的 存款 到期 时 缴税 后 实际 要 得 多少 元 利息 ？ （ 利息 税率 为 5% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7836", "content": "学校 举行 了 跳绳 、 踢毽 比赛 活动 ， 参加 跳绳 的 有 161 人 ， 参加 踢毽 的 人数 是 跳绳 的 2 倍 ． 学校 一共 有 多少 人 参加 了 跳绳 、 踢毽 比赛 活动 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21561", "content": "多少 / 48 = 15 … 12 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22179", "content": "一 套 校服 140 元 ， 其中 裤子 的 价格 是 上衣 的 75% ． 上衣 的 价格 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15998", "content": "某 车 标价 18 万元 ， 按 5% 缴纳 购置税 ， 购车 时 应付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2818", "content": "甲 数 是 36 ， 比 乙 数 大 20% ， 乙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11478", "content": "一 盒 糖 ， 连 盒 共 重 500 克 ， 如果 吃 了 这 盒 糖 的 (2/5) ， 剩下 的 连 盒 重 340 克 ， 原来 糖 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8079", "content": "原 计划 投资 1000 万元 建 一所 小学 ， 实际 用 去 1200 万元 ， 增加 投资 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21491", "content": "王 丽 从 学校 出发 去 县 新华书店 ， 去 时 速度 每 小时 34 千米 ， 用 了 3 小时 ， 返回 时 用 了 2 小时 ， 那么 返回 时 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4088", "content": "在 2012 年 全国 初中 数学 竞赛 中 ， 我校 9 年级 陈 董 泽 同学 荣获 省级 3 等 奖 ， 是 我 县 唯一 获 省级 表彰 的 学生 ． 已知 我 县 获 省级 表彰 的 学生 比 获 市级 表彰 的 学生 少 75% ， 那么 我 县 获 市级 表彰 的 学生 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19280", "content": "一 个 等腰三角 形 的 周长 是 30 厘米 ， 如果 三角形 的 腰 长 是 8 厘米 ， 那么 这个 三角形 的 底边 长 = 多少 厘米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12654", "content": "一 个数 的 (8/9) 是 72 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16197", "content": "498 + 9870 / 35 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17882", "content": "一 种 电冰箱 0.9 销售 ， 王 军 家 买 了 一台 ， 比 原价 便宜 了 147 元 钱 ， 这种 冰箱 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18697", "content": "一 篇文章 ， 宋 老师 已经 打 了 1600 个 字 ， 正好 打 了 全文 的 40% ， 全文 共有 多少 个 字 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11699", "content": "把 一根 木料 锯 成 3 段 要 用 12 分钟 ， 若 要 锯 成 6 段 ， 则 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15155", "content": "(2/7) 吨 的 (3/4) = 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10480", "content": "小 红 的 妈妈 比 她 高 30 厘米 ， 小 红 是 130 厘米 ． 她 妈妈 的 身高 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12386", "content": "一 个数 减去 (7/15) 与 (7/30) 的 差 ， 结果 是 (2/3) ， 这个 数 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3964", "content": "一 堆 煤 ， 第一次 用 去 40% ， 第 二 次 又 用 去 它 的 (1/5) ， 两次 共用 去 36 吨 ． 这 堆 煤 共有 多少 煤 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6783", "content": "有 两列 火车 ， 一列 长 102 米 ， 每秒 行 20 米 ； 另 一列 长 83 米 ， 每秒 行 17 米 ． 两列 火 呈 在 双轨 线 上 相向 而 行 ， 从 两车 相遇 到 车尾 离开 共 要 用 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5216", "content": "仓库 里 有 一些 货物 ， 第一次 运出 全部 的 (2/5) ， 第 二 次 运出 剩下 的 (1/2) ， 第 3 次 比 第一次 少运 (1/3) ， 这时 还有 120 吨 货物 ， 这 批 货物 共有 多少 吨 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "11096", "content": "粮油 店 运 来 粮食 32 袋 ， 每 袋 25 千克 ． 卖出 328 千克 后 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3659", "content": "小 明 在 一 学期 的 5 次 数学 测验 中 的 得分 分别 是 95 、 87 、 92 、 100 、 96 ． 求 小 明 平均 每次 数学 测验 的 得分 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13631", "content": "三角形 的 面积 是 2.7 cm ^ 2 ， 底 长 1.5 cm ， 高 = 多少 cm ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22415", "content": "甲 、 乙 两 船 在 静 水中 的 时速 分别 为 24 和 32 公里 ． 两 船 在 相距 336 公里 的 两 港 同时 同 向 出发 ， 甲 船 在 前 ， 乙 船 在 后 ， 问 几小时 后 乙 船 追 及 甲 船 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3184", "content": "教室 地板 面积 50.4 平方米 ， 边长 是 0.3 米 的 方砖 铺 这个 教室 地面 ， 最少 要 用 多少 块 这样 的 地砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15013", "content": "食堂 运进 一批 煤 ， 计划 每天 烧 0.3 吨 ， 可以 烧 20 天 ， 实际 每天 节约 0.05 吨 ， 实际 能 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20341", "content": "陈老师 去 体育 用品店 买 了 12 个 排球 共用 去 240 元 ， 又 买 了 16 个 篮球 ， 每个 篮球 的 价钱 是 72 元 ． 陈老师 一 共用 了 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12165", "content": "甲 、 乙 两地 相距 800 千米 ， 两列 火车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 5 小时 后 还 相距 125 千米 ． 一列 火车 每 小时 行 65 千米 ， 另 一列 火车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3770", "content": "天天 制衣厂 要 加工 1200 套 运动装 ， 前 3 天 加工 了 总数 的 20% ， 照 这样 的 速度 加工 ， 剩下 的 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13430", "content": "牛奶 公司 搞 促销 ， 原来 每瓶 牛奶 售价 8 元 ， 现在 买 3 瓶 送 一瓶 ． 如果 一次 买 3 瓶 ， 那么 每瓶 比 原来 便宜 多少 钱 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1184", "content": "儿童 服装店 在 “ 6 一 ” 儿童节 卖 了 5 箱 服装 ， 每箱 6 件 ， 一共 收入 1500 元 ， 平均 每件 衣服 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21878", "content": "商店 运 来 苹果 4 吨 ， 比 运 来 的 桔子 的 2 倍 多 (3/4) 吨 ． 运 来 桔子 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4550", "content": "光明 小学 有 20 位 学生 到 超 大农场 摘 水果 ， 他们 一共 摘 了 8 筐 水果 ， 每 筐 水果 重 35 千克 ． 他们 一共 摘 了 多少 千克 水果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21261", "content": "某 粮店 运 来 面粉 450 袋 ， 比 运 来 的 大米 少 180 袋 ． 运 来 的 大米 是 面粉 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11569", "content": "停车场 有 80 辆 小轿车 ， 比 货车 多 (1/3) ， 停车场 停 有 货车 多少 辆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17639", "content": "一 种 袜子 原价 每 双 1.85 元 ， 在 每 双 降价 0.37 元 后 ， 小 红 买 了 5 双 ， 花 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2196", "content": "每 只 箱子 装 20 瓶 汽水 ， 装 140 瓶 汽水 要 多少 只 箱子 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7981", "content": "师傅 3.5 小时 织布 10.92 米 ， 徒弟 每 小时 比 师傅 少 织布 0.82 米 ， 徒弟 每 小时 织布 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9108", "content": "小 亚 读 一 本书 ， 前 4 天 每天 读 32 页 ， 后 3 天 共 读 117 页 ． 小 亚 平均 每天 读 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4340", "content": "某 品牌 电脑 如果 按 定价 出售 可以 获得 利润 480 元 ， 一天 ， 老板 的 一位 朋友 按 定价 的 80% 买 了 一台 ， 粗心 的 老板 等 客人 走 了 以后 一 算 ， 这笔 生意 自己 亏损 了 416 元 ， 你 知道 这 台 电脑 的 成本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12516", "content": "把 (7/4) 千克 可乐 装入 一些 小瓶 ， 每 小瓶 能 装 (1/4) 千克 ， 需要 几个 这样 的 小瓶 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "486", "content": "两只 兔子 比赛 吃 萝卜 ， 一只 吃 了 7 个 ， 另一只 吃 了 5 个 ． 两只 小兔 一共 吃 了 多少 个 萝卜 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19800", "content": "做 一个 生日蛋糕 要 用 0.5 千克 奶油 ， 现有 奶油 10 千克 ， 可以 做 多少 个 这样 的 生日蛋糕 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14600", "content": "爸爸 从 菜场 买 回 2.4 千克 肉 ， 每千克 15.5 元 ； 还 买 回 1.5 千克 鸡蛋 ， 每千克 4.8 元 ， 爸爸 一 共用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7999", "content": "工程队 修铁路 ， 第一次 修 了 要 修 部分 的 (1/9) ， 第 二 次 修 了 要 修 部分 的 (2/9) ， 还 剩 几分 之 几 的 铁路 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15261", "content": "0.46 / 0.3 的 商 是 1.5 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21780", "content": "光明 小学 计划 用 50 万元 新购 一批 电脑 ， 实际 节约 了 10 万元 ， 实际 用 的 是 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1180", "content": "某 工厂 现在 生产 一种 零件 用 了 105 分钟 ， 比 原来 缩短 15 分钟 ， 生产 这样 一个 零件 节省时间 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "319", "content": "长方体 货仓 1 个 ， 长 40 米 ， 宽 30 米 ， 高 15 米 ， 这个 长方体 货仓 最 多 可 容纳 8 立方米 的 正方体 货箱 多少 个 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "104", "content": "甲 数 的 (1/3) 与 乙 数 的 (1/4) 相等 ． 如果 甲 数 是 90 ， 则 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13285", "content": "一 张 存期 为 2 年 的 存单 ， 本金 为 10000 元 ， 年利率 为 4.40% ， 到期 后 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "739", "content": "把 216 朵 鲜花 平均 放在 4 个 花盆里 ， 每个 花盆 有 多少 朵 鲜花 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10547", "content": "(5/9) 的 (3/4) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9766", "content": "某 电器 商场 今年 销售 了 2400 台 电脑 ， 今年 的 销售量 比 去年 增加 了 (1/5) ， 去年 销售 电脑 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15559", "content": "一 根 电线 第一次 用 去 16 米 ， 第 二 次 用 去 它 的 15% ， 两次 一 共用 去 这根 电线 的 40% ， 这根 电线 原来 = 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5525", "content": "某 车间 把 加工 一批 零件 的 任务 按 4 ： 3 分给 甲 、 乙 两 人 ． 完成 任务 时 ， 甲 实际 加工 了 4800 个 零件 ， 超过 原 分配任务 的 20% ， 这 批 零件 计划 一共 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14394", "content": "一 根 木头 长 15 米 ， 要 把 它 平均 分成 5 段 ， 每 锯下 一段 需 8 分钟 ， 锯 完 一共 要 花 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9395", "content": "一 件 雨衣 原价 60 元 ， 现在 打 0.85 出售 ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2948", "content": "服装厂 计划 加工 一批 服装 ， 平均 每天 加工 360 套 ， 要 用 25 天 完成 ． 实际 每天 比 计划 多 加工 90 套 ， 实际 几天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14578", "content": "计算 ： (3/4) + (4/5) + (5/6) + (6/7) + (9/20) + (13/42) = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "19119", "content": "一 本书 共 100 页 ， 第一次 看 了 它 的 (1/4) ， 第 二 次 看 了 20 页 ， 还 剩 多少 没有 看 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12796", "content": "一 幢 楼房 有 6 层 ， 每层 有 8 套 ， 这幢 楼房 的 总面积 是 7020 平方米 ， 平均 每套 房子 有 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1141", "content": "丁丁 买 了 一张 音乐 贺卡 ， 用 了 12 元 ， 买 了 10 张 普通 贺卡 用 了 30 元 ． 一张 音乐 贺卡 比 一张 普通 贺卡 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20241", "content": "有 3 位 男同学 ， 5 位 女同学 ， 现在 从 这些 人 中 选出 一男一女 两名 主持人 ， 共有 多少 种 不同 的 选 法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "740", "content": "果园 里 有 36 棵 桃树 ， 梨树 的 棵 数 是 桃树 的 2 倍 ， 苹果树 比 桃树 和 梨树 的 总数 少 18 棵 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21705", "content": "王师傅 要 加工 455 个 零件 ， 前 5 天 加工 了 65 个 ， 照 这样 的 速度 王师傅 完成 这项 加工 任务 还要 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19054", "content": "一 本书 原价 20 元 ， 打 0.9 出售 的 价格 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1900", "content": "把 一根 钢管 锯 成 一样 长 的 小 段 ， 锯 了 4 次 ， 每 段 占 全长 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8179", "content": "林 琳 有 20 元 钱 ， 她 用 了 (1/5) 的 钱 购买 食物 ， (1/10) 的 钱 购买 饮料 ， 用 剩下 钱 的 (3/8) 购买 了 文具 ， 她 买 文具 用 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "15366", "content": "小 红 看 一 本书 ， 看 了 39 页 ， 剩下 的 比 全书 的 (5/7) 多 7 页 ， 问 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1750", "content": "甲 数 是 30 ， 比 乙 数多 (1/5) ， 乙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "968", "content": "运 一堆 货物 ， 第一天 运 (3/11) ， 第 二 天运 26 吨 ， 还 剩 22 吨 ， 这 堆 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9163", "content": "火车 上 原有 305 人 ， 到 站 后 有 89 人 下车 ， 有 156 人 上车 ． 再 开车 时 火车 上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8855", "content": "小马 有 76 个 苹果 ， 如果 小 李 给 小马 16 个 苹果 ， 小 李 的 苹果 就 比 小马 少 8 个 ． 小 李 原来 有 多少 个 苹果 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6858", "content": "一 件 商品 原价 420 元 ， 0.8 出售 ， 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6426", "content": "一 种 羽绒服 原价 385 元 ． 现在 0.8 出售 ， 买 一件 这样 的 羽绒服 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10358", "content": "小 红 家住 4 楼 ， 她 每 上 一层楼 要 走 17 级 台阶 ， 那么 她 从 第一层 到 第 4 层 要 走 多少级 台阶 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13731", "content": "一 辆 汽车 往返 于 两地 之间 ， 去 时 每 小时 50 千米 ， 6 小时 到达 ， 回来 时 用 了 5 小时 ， 回来 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10348", "content": "甲 、 乙 两地 有 280 千米 ， 一辆 客车 从 甲地 开往 乙地 ， 开出 4 小时 后 离 乙地 还有 20 千米 ． 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10186", "content": "一 个 计算器 35 元 ， 一台 电脑 的 价钱 是 这个 计算器 的 90 倍 ， 买 一台 电脑 和 一个 计算器 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14185", "content": "28 千克 蜂蜜 正好 装 7 罐 ． 照 这样 计算 ， 140 千克 蜂蜜 可以 装 多少 罐 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16048", "content": "修 一段路 ， 已经 修 了 87 千米 ， 是 剩下 的 3 倍 ． 这 段 路 还有 多少 千米 没有 修 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22124", "content": "光明 小学 美术组 有 30 人 ， 生物 组 的 人数 是 美术组 的 (1/3) ， 航模 组 的 人数 是 生物 组 的 (4/5) ． 航模 组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9298", "content": "学校 图书室 新 买 故事书 840 本 ， 是 原有 故事书 的 (3/5) ， 图书室 原有 故事书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17223", "content": "某人 上街 做买卖 ， 每次 只 买 1 斤 鱼 ． 如果 他 以 3 元 一斤 买进 ， 4 元 一斤 卖出 ； 然后 又 以 5 元 一斤 买进 ， 6 元 一斤 卖出 ． 他 赚 了 多少 元 钱 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1061", "content": "65 的 3 倍 ， 减去 81 与 56 的 和 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18072", "content": "淘气 看 一 本书 ， 第一周 看 了 全书 的 30% ， 第 二 周 看 了 全书 的 50% ， 还有 70 页 没 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7959", "content": "学校 买来 红 、 黄 两种 颜色 的 笔记本 做 奖品 ， 黄色 的 个数 占 总数 的 (5/9) ， 红色 的 数量 占 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2428", "content": "学校 图书室 原有 藏书 458 册 ， 有 209 册 破损 清除 了 ， 6 一 儿童节 时 同学 们 又 补 捐 了 149 册 ， 学校 现有 图书 多少 册 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7484", "content": "小 明 身高 126 厘米 ， 正好 是 爸爸 身高 的 70% ， 小 明 爸爸 身高 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16207", "content": "一 个 服装厂 5 天 生产 西服 850 套 ， 照 这样 计算 ， 一个月 生产 西服 多少 套 ？ （ 一个月 按 30 天 计算 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11176", "content": "一 个数 的 (1/4) 与 4 的 差 等于 5.2 的 30% ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8848", "content": "一 个 修路 队 要 修 一条 路 ， 计划 每天 修 150 米 ， 4 天 可以 修 完 ． 实际 提前 1 天 修 完 ， 实际 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7783", "content": "李老师 买 5 个 排球 花 了 175 元 ， 他 还 想 再 买 15 个 同样 的 排球 ， 需要 再 准备 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1967", "content": "甲 、 乙 两个 仓库 都 存有 货物 ， 甲 仓库 运出 80 吨 货物 ， 乙 仓库 运出 20 吨 货物 后 ， 两个 仓库 剩下 的 货物 数量 相同 ． 已知 乙 仓库 原来 存 的 货物 是 甲 仓库 的 (1/3) ， 甲 仓库 原来 存 的 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8763", "content": "化肥厂 第一 车间 8 小时 可 生产 化肥 34 吨 ， 照 这样 计算 ， 要 再生产 127.5 吨 化肥 ， 共 需要 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10219", "content": "水泥厂 计划 生产 一批 水泥 ， 原 计划 25 天 完成 ， 由于 更新 设备 ， 每天 比 原 计划 多 生产 60 袋 ， 因此 只用 20 天 就 完成 了 任务 ． 求 这 批 水泥 有 多少 袋 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20552", "content": "食堂 买来 12 筐 白菜 ， 每 筐 白菜 24 千克 ， 吃 了 185 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7166", "content": "一 块 巧克力 ， 莉莉 吃 了 (1/4) ， 还 剩 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2269", "content": "两块 油菜地 ， 第一块 施肥 (7/20) 吨 ， 比 第 二 块 多 施肥 (1/20) 吨 ， 两块 地 共 施肥 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "810", "content": "有 甲 、 乙 、 丙 3 袋 大米 ， 甲 袋 米 重 150 千克 ， 乙 袋 米 重 是 甲 的 (7/10) ， 是 丙 的 (3/4) ， 丙 袋 大米 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1174", "content": "某种 甘蔗 的 出 糖 率 为 14% ， 用 800 千克 这种 甘蔗 可 榨糖 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11828", "content": "超市 里 有 可乐 54 箱 ， 是 芬达 的 3 倍 ， 可乐 比 芬达 多 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11850", "content": "有 一个 蛋糕 ， 爸爸 和 妈妈 各 吃 了 这个 蛋糕 的 (2/7) ， 剩下 的 被 张旭 吃 完 了 ． 张旭 吃 了 这个 蛋糕 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13692", "content": "修 一条 公路 ， 甲队 单独 修 要 16 天 完成 ， 而 乙 队 每天 修 2.7 km ， 他们 始终 合作 ， 当 他们 共同完成 这 段 公路 时 ， 甲队 修 了 这 段 路 的 (5/8) ， 求 这 段 公路 的 全长 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5365", "content": "小 东 骑 自行车 上学 ， 他家 到 学校 的 路程 是 1570 米 ， 小 东 的 自行车 车轮 直径 大约 是 0.5 米 ， 如果 平均 每分钟 转 100 周 ， 他 从 家 到 学校 大约 需要 多少 分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3680", "content": "从 甲地 到 乙地 之间 的 公路 长 216 千米 ． 一辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 (3/8) ， 行 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8120", "content": "某 物品 按 定价 出售 可 获 6 元 利润 ， 现 按 定价 的 80% 出售 15 个 所 获得 利润 与 按 原价 每个 减价 2.4 元 出售 10 个 所 获 利润 相等 ， 那么 每个 物品 的 成本价 = 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "21710", "content": "一 支 钢笔 8.3 元 ， 一支 圆珠笔 2.5 元 ． 一支 钢笔 比 一支 圆珠笔 贵 几元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11119", "content": "把 8 支 红 铅笔 和 2 支 蓝 笔 放在 一个包 里 ， 让 你 每次 往 里 摸 一次 ， 这样 摸 了 20 次 ， 摸 出 蓝 铅笔 大约 占 总 次数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17552", "content": "一 个 平行四边形 框架 相邻 两边 的 长 分别 为 9 分 米 和 5 分 米 ， 如果 把 它 拉 成 一个 长方形 ， 这个 长方形 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11340", "content": "一 本书 共有 60 页 ， 已经 看 了 39 页 ， 还 剩下 全书 的 ( ( ( ) ) / ( ( ) ) ) 没 看 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12603", "content": "学校 图书馆 买来 2 个 书架 ， 每个 书架 有 5 层 ， 每层 放 30 本书 ， 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14880", "content": "要 运 一批 货物 ， 第一次 运 了 这 批 货物 的 (1/5) ， 第 二 次 运 了 这 批 货物 的 40% ， 还 剩 40 吨 ， 这 批 货物 共有 几吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2851", "content": "学校 买来 一些 粉笔 ， 用 去 28 盒 ， 还 剩 40 盒 ． 学校 买来 多少 盒 粉笔 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10649", "content": "有 甲乙 两桶 汽油 共 重 180 千克 ， 甲 桶 汽油 比 乙 桶 少 (2/5) ． 乙 桶 汽油 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4693", "content": "学校 图书馆 有 文艺 书 、 科技 书 共 640 本 ， 其中 科技 书 占 25% ， 后 又 买进 一批 科技 书 ， 这时 科技 书 占 40% ， 后 又 买进 多少 本 科技 书 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "105", "content": "一 本 故事书 有 192 页 ， 小 明 每天 看 32 页 ， 小强 每天 看 48 页 ， 小 明 比 小强 迟 几天 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19182", "content": "某 公司 2002 年 平均 每月 的 销售额 是 12 万元 ， 如果 按 销售额 的 15% 缴纳 消费税 ， 该 公司 全年 应 缴纳 多少 消费税 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18645", "content": "农贸市场 运 来 大白菜 540 千克 ， 萝卜 750 千克 ， 大白菜 每 筐 装 45 千克 ， 萝卜 每 筐 装 50 千克 ． 萝卜 比 大白菜 多 运 多少 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14170", "content": "张大妈 从 水果 批发店 买来 苹果 和 梨 各 50 千克 ， 共用 740 元 ． 每千克 苹果 9.8 元 ， 每千克 梨 要 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7777", "content": "加工 一批 零件 ， 如果 单独 加工 ， 师傅 2 小时 可以 完成 全部 零件 的 (1/6) ， 徒弟 3 小时 可以 完成 全部 零件 的 (1/8) ， 现 两 人 合作 ， 多少 小时 可以 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17034", "content": "小 英 沿着 一条 50 米 的 直 道 往返 走 了 2 个 来回 ， 共 走 了 400 步 ， 平均 每步 = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21588", "content": "据统计 ， 我国 660 个 城市 中 ， 有 (2/3) 的 城市 供水 不足 ， 在 这些 供水 不足 的 城市 中 ， 又 有 (3/10) 的 城市 严重 缺水 ， 我国 严重 缺水 的 城市 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3773", "content": "商店 原来 有 一批 彩电 ， 卖出 (5/7) ， 又 运进 54 台 ， 这时 店里 彩电 比 原来 少 (1/5) ， 原来 有 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4765", "content": "一 列 快车 和 一列 慢车 相向 而 行 ， 快车 的 车长 是 280 米 ， 慢车 的 车长 是 385 米 ． 坐在 快车 上 看见 慢车 驶过 的 时间 是 11 秒 ， 那么 坐在 慢 车上 看见 快车 驶过 的 时间 = 多少 秒 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19749", "content": "某 机械厂 十 月份 盈利 42 万元 ， 拿出 一部分 捐给 灾区 ， 捐给 灾区 的 钱 数 比 剩下 的 多 10% ， 捐给 灾区 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8166", "content": "方 明早 上 上学 ， 从 家 到 学校 要 用 15 分钟 ， 平均 每分钟 走 60 米 ． 下午 放学 回家 用 了 18 分钟 ， 放学 回家 时 方明 每分钟 走 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6491", "content": "修 一条 公路 ， 计划 每天 修 1.6 千米 ， 25 天 修 完 ， 实际 每天 多 修 0.4 千米 ， 实际 多少 天 修 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "989", "content": "王师傅 做 零件 ， 上午 工作 4 小时 ， 平均 每 小时 做 零件 55 个 ， 下午 工作 3 小时 ， 共 做 零件 130 个 ， 一天 平均 每 小时 做 零件 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19401", "content": "有 一 池水 ， 第一天 放出 200 吨 ， 第 二 天 比 第一天 多 放 20% ， 第 3 天 放 了 整 池水 的 36% ， 正好 全部 放 完 ． 这 池水 共有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2067", "content": "某 小学 今年 计划 全年 用水 200 吨 ， 比 去年 节约用水 50 吨 ， 今年 比 去年 计划 节约用水 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15787", "content": "某校 学生 中 有 72% 会 打乒乓球 ， 65% 会 打篮球 ， 已知 会 打乒乓球 的 比 会 打篮球 的 多 14 人 ， 这 所 学校 一共 有 多少 学生 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11492", "content": "某村 去年 植树 2400 棵 ， 今年 比 去年 多 20% ， 今年 和 去年 一共 植树 多少 课 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2064", "content": "果园 里 桃树 棵 数 的 (3/4) 等于 杏树 棵 数 的 (2/5) ， 这个 果园 有 桃树 80 棵 ， 有 杏树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20539", "content": "(3/2) + (6/5) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3790", "content": "航模 小组 有 8 人 ， 其中 女生 有 5 人 ， 男生 人数 占 全组 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3466", "content": "3 月 春天 来 了 ， 同学 们 集体 去 春游 ， 带 饼干 的 有 27 人 ， 带 面包 的 有 21 人 ， 既 带 饼干 又 带 面包 的 有 18 人 ， 每人 至少 带 一种 ， 参加 春游 的 一共 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6839", "content": "鲁迅故居 上午 来 了 835 个 游客 ， 中午 走 了 576 个 游客 ， 下午 又 来 了 349 个 游客 ， 这时 鲁迅故居 里 一共 还有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3361", "content": "一 条 公路 已经 修好 1500 米 ， 比 没 修 好多 500 米 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4156", "content": "某班 全体同学 参加 计算机 等级 考试 ， 其中 (2/7) 的 学生 取得 优秀 证书 ， 其余 25 名 同学 都 取得 合格证书 ， 问 该班 共有 学生 多少 名 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21114", "content": "圆形 滑冰场 的 一周 全长 为 300 米 ， 如果 每隔 15 米 安装 一盏 路灯 ， 一共 需要 按 几盏 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18218", "content": "东兴 服装厂 生产 一批 童装 ， 计划 每天 生产 255 套 ， 30 天 完成 任务 ． 由于 开展 劳动竞赛 ， 实际 只用 25 天 就 完成 了 任务 ， 实际 每天 比 原 计划 多 生产 多少 套 童装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9814", "content": "某 单位 举行 抽奖 活动 ， 参与 就 有奖 ， 设有 一等奖 3 名 ， 二 等 奖 10 名 ， 3 等 奖 60 名 ， 第一 抽奖 者 能 中 一等奖 的 可能 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13136", "content": "笑笑 买 了 3 盒 圆珠笔 ， 每盒 12 支 ， 每支 2 元 ， 一共 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13421", "content": "王 云 家 、 赵 红 家 和 学校 在 同 一条 路上 ． 王 云 到 学校 有 316 米 ， 赵 红 到 学校 有 128 米 ． 王 云 家 到 赵 红 家 至少 有 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12026", "content": "一 个数 扩大 10 倍 后 ， 比 原来 的 数 增加 了 22.05 ， 原 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5683", "content": "水果店 运 来 一种 含水 99% 的 某种 水果 1000 千克 ， 放置 几天 后 ， 含水量 变成 98% ， 这时 这种 水果 变成 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9777", "content": "工厂 有 一批 煤 ， 计划 每天 烧 5.5 吨 ， 可以 烧 70 天 ， 实际 每天 只 烧 5 吨 ， 这样 可以 比 计划 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3915", "content": "把 一根 3 米 长 的 竹竿 插入 土 中 ， 露出 地面 的 部分 长 2.4 米 ， 插入 土 中 的 部分 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11892", "content": "同学 们 做操 ， 小 丽 站 在 左 起 第 12 个 ， 从 右 起数 第 8 个 ， 从 前面 数 第 5 个 ， 从 后面 起 第 15 个 ， 一共 有 多少 名 同学 在 做操 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "20195", "content": "应用题 六年级 有 男生 84 人 ， 占 全年 级 人数 的 (7/12) ， 而 六年级 人数 又 占 全校 的 (1/5) ， 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6471", "content": "商店 运 来 梨 84 筐 ， 比 运 来 的 桔子 少 16 筐 ， 运 来 的 香蕉 的 筐 数 是 桔子 的 2 倍 ， 运 来 香蕉 多少 筐 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2859", "content": "修路 队 修 一条 公路 ， 已修 的 和 未 修 的 比 是 2 ： 3 ， 已知 已修 了 400 米 后 ， 这 条 公路 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13665", "content": "乙 、 丙 两 数 和 的 (3/17) 是 甲 数 ， 甲 数 是 15 ， 甲 乙丙 3 数 的 和 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15672", "content": "某村 修 一条 水渠 ， 原 计划 每天 修 40 米 ， 35 天 修 完 ． 结果 25 天 就 完成 了 任务 ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8122", "content": "一 辆 摩托车 以 每 小时 126 千米 的 速度 从 甲地 去 乙地 ， 经过 2 小时 到达 乙地 ， 然后 用 2.5 小时 返回 甲地 ． 这辆 摩托车 往返 一次 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8046", "content": "今年 3 月 ， 张 叔叔 把 1000 元 存入 银行 ， 定期 2 年 ， 年利率 4.40% ． 到期 应得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8190", "content": "张 阿姨 进货 ， 买 了 30 千克 苹果 和 28 千克 香蕉 ， 一 共用 去 146 元 ， 每千克 香蕉 2 元 ， 每千克 苹果 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2491", "content": "一 列 长 160 米 的 火车 穿过 一条 长 240 米 的 隧道 ， 进入 隧道 直到 完全 离开 用 2 分钟 ， 火车 每分钟 行 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13850", "content": "某 鞋厂 7 月份 上 半月 生产 了 12 天 ， 平均 每天 生产 350 双 鞋 ， 下半月 生产 了 13 天 ， 共 生产 了 4500 双 鞋 ， 这个 月 平均 每天 生产 多少 双 鞋 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8044", "content": "12 增加 20% 后 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8222", "content": "有 一块 花布 4 米 ， 正好 可以 做 6 条 童裤 ， 每 条 童裤 用 这块 布 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14140", "content": "沿着 一个 圆 广场 的 一周 ， 每隔 10 米 安装 一盏 路灯 ， 一共 需要 32 盏 ， 这个 圆形 广场 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1124", "content": "一 辆 越野车 在 沙漠 中 行使 32.5 千米 耗油量 为 5.2 升 ， 它 要 穿越 的 无人区 总 路程 为 1303 千米 ， 至少 要 准备 多少 升 汽油 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22722", "content": "甲 、 乙 两 人 步行 速度 之 比 是 7 ： 5 ， 甲 、 乙 分别 从 a 、 b 两地 同时 出发 ． 如果 相向 而 行 ， 0.5 小时 后 相遇 ， 如果 他们 同 向 而 行 ， 那么 甲 追 上 乙 需要 多长时间 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9783", "content": "羽毛球 训练 ， 甲组 有 5 名 男队员 ， 乙组 有 4 名 女队员 ， 进行 男女 混合双打 配对 ， 一共 有 多少 种 不同 的 配对 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3304", "content": "张 华 把 40000 元 钱 存入 银行 ， 存 定期 3 年 ， 年利率 为 3.69% ， 到期 后 的 利息 = ？ 应 交纳 多少 利息税 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14221", "content": "一 种 电视机 ， 原来 每 台 10000 元 ， 现在 比 原来 便宜 25% ， 现在 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9862", "content": "粮店 运进 大米 和 面粉 各 20 袋 ， 每 袋 大米 75 千克 ， 每 袋 面粉 25 千克 ， 运进 的 大米 和 面粉 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "23078", "content": "某 商店 将 每 台 彩电 先 按 进价 提高 40% 标出 售价 ， 然后 广告宣传 将 以 0.8 的 优惠价 出售 ， 结果 每 台 彩电 赚 了 300 元 ， 则 经销 这种 彩电 的 利润率 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6728", "content": "甲 、 乙 两车 同时 从 a 、 b 两站 相向 而 行 ， 相遇 时 甲乙 两车 所 行 路程 比 是 3 ： 5 ． 相遇 后 ， 甲 车 继续 以 原来 每 小时 135.7 km 的 速度 行驶 ， 又 用 了 4 小时 到达 b 地 ， 求 甲 、 乙 两车 相遇 时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20117", "content": "小 明 读 一本 故事书 ， 第一天 读 了 全书 的 (1/5) ， 第 二 天 读 了 24 页 ， 这时 已 读 的 与 未 读 的 比 是 2 ： 3 ， 这本 故事书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20254", "content": "一 家 商家 把 一件 连衣裙 标价 为 280 元 ， 经 打假 人员 鉴别 ， 降 至 60 元 一件 出售 ， 但 仍 可 赚 20% ， 那么 这件 连衣裙 的 成本价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17481", "content": "从 65 里 连续 减 5 ， 减 多少 次 才能 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "940", "content": "把 72 千克 糖 平均 装 在 8 个 袋子 里 ， 每个 袋子 应 装 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22560", "content": "有 一本 360 页 的 书 ， 小巧 每天 看 25 页 ， 看 了 几天 后 还 剩 110 页 没 看 完 ， 小巧 看 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18666", "content": "一 打 铅笔 有 12 支 ， 10 打 铅笔 装 一盒 ， 每 50 盒装 一箱 ， 一箱 铅笔 多少 支 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20946", "content": "学校食堂 有 面粉 200 千克 ， 大米 是 面粉 的 (4/5) ， 大米 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18574", "content": "一 列 火车 全长 (1/8) 千米 ， 通过 一座 长 (13/16) 千米 大桥 ， 从 车 头上 桥 到 车尾 离 桥 共用 了 3 分钟 ． 这 列 火车 过桥 时 ， 每分钟 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16567", "content": "某 办公室 需要 粉刷 的 面积 是 64 平方米 ， 在 无 损耗 的 情况 下 ， 每平方米 用 涂料 0.5 升 ， 如果 粉刷 时 有 (1/8) 的 损耗 ， 应 购买 多少 升 涂料 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22213", "content": "小强 体重 是 48 千克 ， 小林 体重 是 小强 的 (5/6) ， 小 明 体重 是 小林 的 (4/5) ． 小 明 的 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "986", "content": "水果店 运 来 苹果 (7/8) 吨 ， 运 来 的 梨 是 苹果 的 (4/5) ， 运 来 的 香蕉 比 梨 多 (1/2) ， 运 来 的 香蕉 比 梨 多 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1842", "content": "甲 、 乙 两辆 汽车 分别 从 相距 385 千米 的 a 、 b 两地 同时 出发 ， 相向 而 行 ， 经过 3.5 小时 相遇 ． 已知 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1271", "content": "有 324 个 零件 ， 张师傅 每天 生产 18 个 ， 李师傅 每天 生产 15 个 ． 张师傅 生产 8 天 后 由 李师傅 接着 生产 ． 李师傅 还要 多少 天 才能 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5692", "content": "一 个 圆柱 的 体积 是 36 立方分米 ， 底 面积 是 9 平方分米 ， 它 的 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19689", "content": "公园 里 的 小 火车 每次 坐 22 人 ， 3 次 一共 可以 坐 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13392", "content": "一 根 水管 锯 成 5 段 要 20 分钟 ， 锯 成 10 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14498", "content": "甲 数 是 105 ， 它 的 12 倍 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3085", "content": "有 含盐 率 为 15% 的 盐水 30 千克 ， 根据 需要 ， 要 使 盐水 的 含盐 率 变为 25% ， 那么 ， 我们 可以 加盐 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1182", "content": "一 辆 货车 4 小时 耗油 (20/3) 升 ． 这辆 货车 每 小时 耗油 多少 升 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22627", "content": "几名 工人 在 3 峡 水库 的 一边 植树 32 棵 ， 每棵 树 相距 3.64 米 ， 从 第 一棵树 到 最后 一棵树 共 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10670", "content": "买 一辆 汽车 ， 分期付款 要 多 加价 7% ， 如果 ， 现金 购买 可 按 0.95 优惠 ． 王 叔叔 准备 买 一辆 15 万元 的 汽车 ， 现金支付 的 方式 比 分期付款 少 多少 万元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19319", "content": "一 盒 巧克力 ， 已经 吃 了 (3/5) ， 还 剩 16 块 ， 这 盒 巧克力 原来 有 多少 块 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4269", "content": "一 个数 的 2.6 倍 加上 这个 数 本身 ， 和 是 57.24 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8636", "content": "小 红 买 了 3 本 作文 本 和 2 本 写字 本 ． 买 作文 本 用 了 2.25 元 ， 买 写字 本 用 了 0.96 元 ． 每 本 作文 本 比 写字 本 贵 多少 元 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13880", "content": "扩建 一项 工程 ， 投资 40 万元 ， 比 原 计划 节约 了 10 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2694", "content": "某 服装店 的 一件 上衣 按 0.75 出售 后 的 价钱 是 360 元 ， 这件 上衣 原价 卖 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17968", "content": "从 卧龙 滩 到 莲花 峰顶 要 走 4525 米 ， 小胖 3 小时 爬 2715 米 ， 如果 小胖 的 速度 不变 ， 他 爬 到 莲花 峰顶 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19007", "content": "某 饲养场 今年 养鸡 4000 只 ， 比 去年 增加 25% ， 去年 养鸡 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22799", "content": "装订 一批 书 ， 每天 装订 1200 册 ， 12 天 可以 装订 完 ． 如果 要 提前 2 天 装订 完 ， 每天 应 装订 多少 册 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4740", "content": "某班 红领巾 图书 角 有 图书 200 本 ， 借出 一批 后 还 剩 原有 图书 的 (1/4) ， 借出 图书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "865", "content": "2 台 拖拉机 3 小时 耕地 1.8 公顷 ， 每 台 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14708", "content": "某 修路 队 修 一条 路 ， 已经 修 了 240 米 ， 正好 是 剩下 长度 的 (2/3) ． 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20446", "content": "两队 筑路 工人 合 修 一条 路 ， 4 天 可以 修 完 ． 甲队 每天 修 60 米 ， 乙 队 3 天 修 150 米 ， 这 条 路 长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1863", "content": "玩具厂 生产 一批 绒毛 小兔 ， 原 计划 每天 加工 150 个 ， 16 天 完成 任务 ． 实际 每天 比 原 计划 多 加工 10 个 ， 实际 完成 任务 用 了 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15821", "content": "一 堆 260 吨 的 砂石 ， 前 5 天 运走 总数 的 30% ， 后 3 天 运走 总数 的 45% ， 还 剩下 多少 吨 砂石 没有 运走 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8303", "content": "五年级 （ 1 ） 班 有 学生 56 人 ， 其中 每人 至少 做 完 一种 作业 ， 45 人 做 完 数学 作业 ， 42 人 做 完 语文 作业 ， 这个 班 两种 作业 都 做 完 的 人 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3219", "content": "张 爷爷 家 有 一块 地 ， 他 用 这块 地 的 (2/9) 种 大豆 ， (2/5) 种 玉米 ， 其余 的 种 棉花 ， 种 棉花 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18407", "content": "妈妈 花 了 400 元 买 了 一件 打 0.8 的 衣服 ， 这件 衣服 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11048", "content": "已知 两个 因数 的 积 是 24 ， 其中 一个 因数 是 (1/2) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2379", "content": "李 明 看 一本 398 页 故事书 ， 已经 看 了 3 天 ， 每天 看 50 页 ， 剩下 的 4 天 看 完 ， 平均 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16269", "content": "1000 里面 连续 减去 多少 个 90 ， 就 剩下 10 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4199", "content": "超市 原有 4500 千克 大米 ， 买 掉 3000 千克 后 ， 又 运 来 1200 千克 ， 现在 有 多少 千克 大米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11934", "content": "翡翠 山 湖 小学 四年级 有 35 名 同学 要 去 旅游 ， 已知 每位 同学 要 120 元 的 旅游费 ， 那么 这次 旅游 要 花 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22826", "content": "学校 买 12 个 篮球 ， 11 个 排球 ， 每个 篮球 35 元 ， 每个 排球 32 元 ， 买 这些 球 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22664", "content": "芊芊 从 家里 骑车去 一个 离家 较 远 的 森林公园 ， 第一个 小时 行驶 了 全程 的 25% ， 第 二 个 小时 比 第一个 小时 多 行驶 了 5 千米 ， 又 行驶 了 15 千米 之后 才 到达 森林公园 ， 芊芊 从 出发 到 森林公园 一共 行驶 了 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11183", "content": "胡 老师 每个 月工资 1200 元 ， 超过 1000 元 的 部分 按 5% 交纳 个人所得税 ， 胡 老师 实际 每月 收入 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21784", "content": "一 种 录音机 原来 每 台 售价 250 元 ， 现在 每 台 200 元 ， 现在 每 台 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6773", "content": "实验 小学 为 支援灾区 捐款 ， 4 、 5 、 六年级 共 捐款 54000 元 ， 他们 捐款 钱 数 的 比 是 5 ： 6 ： 7 ， 六年级 捐款 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20150", "content": "一 辆 汽车 行 1 千米 耗油 (1/12) 升 ， 照 这样 计算 ， 行 (3/4) 千米 耗油 多少 升 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6654", "content": "张老师 带 800 元 钱 到 商店 买 了 12 套 运动服 ， 结果 剩下 80 元 ， 每套 运动服 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13971", "content": "客车 和 货车 同时 从 甲 、 乙 两地 相向 而 行 ， 5 小时 相遇 ， 相遇 后 客车 又 行 了 3 小时 到达 乙地 ， 已知 货车 每 小时 行 63 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14879", "content": "一 根 电线 ， 用 去 20 米 ， 剩下 的 比 原来 的 75% 多 5 米 ， 这根 电线 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20405", "content": "一 个数 的 8 倍 是 96 ， 这个 数 的 7 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10857", "content": "一 种 商品 现在 售价 80 元 ， 比 原价 提高 了 16 元 ． 现价 比 原价 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22932", "content": "一 台 压路机 的 前轮 是 圆柱形 ， 轮 宽 1.5 米 ， 直径 是 1.2 米 ， 前轮 转动 4 圈 ， 压路 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "5468", "content": "餐桌 长 (9/10) 米 ， 宽 (6/10) 米 ， 长 比 宽 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21253", "content": "修路 队 要 修 一条 长 650 米 的 路 ， 5 天 修 完 ． 平均 每天 修 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22226", "content": "高淳县 纺织 机械厂 一月份 计划 生产 纺织机 240 台 ， 实际 比 计划 多 生产 48 台 ， 实际 完成 了 原 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14267", "content": "一 辆 汽车 从 甲地 到 乙地 行 了 75.6 千米 ， 正好 是 全程 的 75% ， 距 乙地 还有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14951", "content": "把 8 米 长 的 绳子 截 成长 短 两段 ， 要 使 短 段 绳子 的 长度 是 长 段 的 25% ， 短 段 绳子 应 = 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9571", "content": "一 种 药水 ， 按 药物 和 水 2 ： 145 的 比例 配制 而 成 ， 现在 有 此种 药物 9 克 ， 一共 可 配制 成 这种 药水 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22853", "content": "小 红 和 小 亮 住 在 同一个 大楼 ， 小 红 家住 5 楼 ， 回家 要 上 96 个 台阶 ， 小 亮 回家 要 上 144 个 台阶 ， 问 小 亮 家住 多少 楼 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17075", "content": "在 北京 奥运会 上 ， 体操队 共 获得 14 枚 奖牌 ， 羽毛球队 共 获得 8 枚 奖牌 ， 体操队 比 羽毛球队 获得 的 奖牌 多 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7328", "content": "计算 ： 599999 + 59999 + 5999 + 599 + 59 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "6398", "content": "在 一次 检阅 中 ， 接受 检阅 的 一列 彩车 车队 共 30 辆 ， 每辆车 长 4 米 ， 前后 每辆车 相隔 5 米 ． 这 列车 队 共 排列 多长 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3960", "content": "一 根 木条 ， 要 把 它 锯 成 5 段 ， 如果 锯开 一处 要 用 2 分钟 ， 锯 完 这根 木条 一 共用 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19985", "content": "一 辆 汽车 从 甲地 到 乙地 要 行 15 小时 ， 这辆 汽车 的 速度 是 每 小时 60 千米 ， 甲地 到 乙地 的 路程 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10389", "content": "一 个数 除以 8 ， 商 和 余数 都 是 6 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17950", "content": "小 红 读 一本 120 页 的 课外书 ， 第一天 读 了 (1/3) ， 第 二 天 从 多少 页 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9364", "content": "六年级 去年 有 120 人 参加 兴趣小组 活动 ， 比 今年 减少 (1/5) ， 今年 有 多少 人 参加 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19479", "content": "纺织厂 原 计划 全年 （ 12 个 月 ） 生产 棉布 94.8 万米 ， 实际 只用 10 个 月 完成 了 全年 计划 ． 实际 每个 月 比 原 计划 多产 棉布 多少 万米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10928", "content": "在 相距 100 米 的 两 楼 之间 栽 上 桂花树 ， 每隔 5 米 栽 一棵 ， 一共 要 栽 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13908", "content": "一 个 三角形 ， 3 条 边 的 长度 分别 是 16 厘米 ， 25 厘米 和 24 厘米 ， 这个 三角形 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "426", "content": "已知 一 玩具店 每个 排球 售价 为 18.5 元 ， 小 明 买 了 7 个 排球 ， 手里 还 剩 98.4 元 ． 小 明 一共 带 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6012", "content": "星期天 ， 少先队员 帮助 敬老院 做 衣架 ， 小 华 做 7 个 ， 小 红 和 小 刚 合 做 了 13 个 ， 小 方 做 4 个 ， 平均 每个 人 做 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12468", "content": "修 一条 水渠 ， 已经 修 了 (3/4) ， 剩下 18 千米 ， 这 条 水渠 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18603", "content": "一 个数 的 40% + 12 正好 等于 这个 数 本身 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21324", "content": "国庆节 期间 ， 某 超市 的 商品 一律 按 原价 的 (7/8) 出售 ， 一种 商品 现在 售价 280 元 ， 那么 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11188", "content": "师徒 两 人 共同 加工 1200 个 零件 ， 已经 完成 了 全部 任务 的 (4/5) ， 其中 的 (5/8) 是 师傅 加工 的 ． 师傅 已经 加工 了 多少 个 零件 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1218", "content": "四川 汶川 地震 时 ， 某 车队 向 灾区 运送 一批 救灾物资 ， 去 时 每 小时 行驶 60 千米 ， 5 小时 到达 灾区 ， 回来 时 每 小时 行驶 75 千米 ， 经过 多少 小时 能够 返回 出发地 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18961", "content": "李师傅 (5/3) 小时 完成 了 一天 工作量 的 (3/10) ， 正好 做 了 60 个 零件 ． 李师傅 一天 要 做 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22940", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一天 走 350 千米 ， 第 二 天 走 的 比 第一天 多 20% ， 没 走 的 比 两天 共 走 的 多 (1/14) ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.8, "length": 19}
-{"question_id": "19445", "content": "一 项 工程 ， 甲乙 两组 合作 4 天 可 完成 这项 工程 的 (1/10) ， 那么 完成 全 工程 要 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17205", "content": "某 工厂 有 240 名 工人 ， 其中 女工 占 (5/8) ， 后来 又 调进 若干名 女工 ， 这时 女工 占 总 人数 的 (20/29) ． 调进 女工 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "350", "content": "某 海岛 战士 为 解决 岛上 淡水 缺乏 问题 ， 和 当地 居民 共同 修建 一个 长 22 m ， 宽 10 m ， 可以 蓄 淡水 396 方 的 长方体 蓄水池 ， 现在 已经 挖出 66 方 的 土 ， 还要 往 下 挖 多 深 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3958", "content": "甲 数 是 7.09 ， 比 乙 数 少 1.49 ， 甲乙 两 数 的 和 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1921", "content": "一 个数 的 (1/5) 比 它 的 (1/4) 少 10 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3535", "content": "计算 ： (2/3) - (3/5) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20985", "content": "某 车间 计划 生产 3000 个 零件 ， 生产 8 天 后 ， 已经 完成 (2/5) ， 照 这样 计算 ， 这 批 零件 多少 天 可 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6144", "content": "宏 光 机床厂 第一 生产 车间 共有 职工 350 人 ， 其中 男 、 女职工 人数 的 比 是 5 ： 2 ． 男 职工 有 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10368", "content": "1701 / 27 的 商 加上 189 与 73 的 差 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6672", "content": "小 明 骑 自行车 每分钟 能 行 0.25 千米 ， 从 他家 到 商店 有 4 千米 ， 需要 多长时间 能 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15829", "content": "一 个 圆柱 的 侧面 展开 是 一个 正方形 ． 如果 高 增加 2 厘米 ， 表面积 增加 12.56 平方厘米 ． 原来 这个 圆柱 的 侧 面积 = 多少 平方厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2152", "content": "王老师 拿 了 200 元 钱 为 学生 买 奖品 ， 笔记本 每 本 8 元 ， 要 买 15 本 ， 应 找回 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19734", "content": "胜利 小学 有 学生 328 人 ， 前进 小学 的 人数 是 胜利 小学 的 3 倍 ， 前进 小学 比 胜利 小学 多 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4279", "content": "某 学校 合唱队 与 舞蹈队 的 人数 之 比 为 3 ： 2 ， 如果 将 合唱队 队员 调 10 人 到 舞蹈队 ， 则 人数 比 为 7 ： 8 ， 原 合唱队 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "14157", "content": "声音 的 传播速度 是 340 米 / 秒 ， 天宫 一号 航天器 飞行速度 大约 是 声音 传播速度 的 22 倍 ． 天宫 一号 航天器 每分钟 大约 飞行 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2470", "content": "向阳 小学 大约 有 800 人 ， 10 个 这样 的 学校 大约 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20824", "content": "学校 准备 买 26 个 篮球 ， 每个 价格 为 13.30 元 ． 后来 从 买 篮球 的 钱 里 拿出 一部分 买 了 一些 排球 用 去 106.4 元 ， 这样 还 能 买 篮球 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12311", "content": "王 红 步行 每分钟 走 60 米 ， 她 从 家 到 学校 走 了 12 分 ， 她家 到 学校 多少 米 ， 数量 关系式 = 多少 ○ 多少 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16408", "content": "甲 ， 乙 两队 合 修 一段 公路 ， 修 完 时 ， 甲队 修 了 (3/4) 千米 ， 乙 队 比 甲队 少 修 (1/5) 千米 ． 这 段 公路 长 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8483", "content": "甲 、 乙 、 丙 每分钟 的 速度 分别 为 75 米 、 80 米 、 100 米 ． 甲 、 乙 从 a 地 ， 丙 从 b 地 ， 同时 相向 出发 ， 丙 遇上 乙 后 3 分钟 再 遇到 甲 ． 求 a 、 b 两地 的 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19785", "content": "奶奶 家养 了 一些 家禽 ， 其中 鸡 有 28 只 ， 鸭 的 只 数 是 鸡 的 只 数 的 (4/7) ， 鸭 的 只 数 是 鹅 的 只 数 的 (2/3) ． 奶奶 养 鹅 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21396", "content": "玲玲 买 了 一 本书 和 一支 钢笔 ， 书 的 价格 是 14 元 ， 正好 是 钢笔 价格 的 (2/5) ． 钢笔 的 价格 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16179", "content": "一 个数 的 (4/5) 是 120 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21429", "content": "小 红 折 纸鹤 （ h è ） ， 前 3 天 每天 折 4 只 ， 后来 又 折 了 5 只 ， 她 一共 折 了 多少 只 纸鹤 ？ 答 ： 她 一共 折 了 多少 只 纸鹤 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4082", "content": "小 明 所在 的 班 共有 学生 50 人 ， 其中 女生 占 60% ， 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12090", "content": "小 明 读 一本 240 页 的 书 ， 已 读 的 页数 与 未 读 页数 的 比 是 3 ： 2 ． 小 明 还有 多少 页 没有 读 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20693", "content": "甲乙 两地 相距 360 千米 ， 一列 货车 和 一列 客车 从 甲 、 乙 两地 同时 相对 开出 ， 已知 客车 的 速度 是 每 小时 50 千米 ， 货车 的 速度 是 客车 的 (4/5) ， 两车 开出 后 几小时 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5747", "content": "一 个 长方体 的 体积 是 30 立方厘米 ， 长 6 厘米 ， 宽 5 厘米 ， 高 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1053", "content": "计算 口 / △ ， 结果 是 ： 商 为 10 ， 余数 为 5 ． 那么 △ 的 最小值 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10276", "content": "小 聪 每天 写 3 个 大字 ， 他 一个月 （ 30 天 ） 可以 写 多少 个 大字 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18018", "content": "六年级 体育 达标率 为 88% ， 一共 有 24 个 同学 没有 达标 ， 全年 级 体育 达标 的 同学 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10432", "content": "某 鞋厂 今天 的 出勤率 是 95% ， 又 知 到 厂 上班 的 人数 比 缺勤 的 人数 多 180 人 ， 这家 工厂 一共 有 多少 工人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19997", "content": "某班 45 名 同学 参观 动物园 ， 汽车票 每人 8 元 ， 门票 每人 15 元 ， 他们 共用 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9673", "content": "水果店 运 来 葡萄 和 桔子 ， 葡萄 有 9 千克 ， 桔子 的 重量 是 葡萄 的 3 倍 ， 葡萄 和 桔子 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1952", "content": "某 数 加上 14 ， 除以 3 ， 再 减去 26 ， 最后 乘 25 ， 得 100 ． 这个 数 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21779", "content": "小 华 家 1 年 中 ， 前 5 个 月 用水 57.5 吨 ， 后 7 个 月 用水 80.5 吨 ． 平均 每个 月 用 多少 吨 水 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18661", "content": "学校 图书馆 购买 了 380 本 新书 ， 其中 科技 类图书 占 了 (1/4) ， 文艺 类图书 占 了 40% ， 科技 类图书 和 文艺 类图书 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6800", "content": "一 辆 汽车 给 工厂 运 原料 ， 上午 运 了 4 次 ， 共运 22.5 吨 ， 下午 运 了 5 次 ， 比 上午 多 运 7.5 吨 ， 平均 每次 运 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18430", "content": "苗圃场 有 杨 树苗 4500 株 ， 柳树 苗 比 杨 树苗 的 3 倍 少 800 株 ， 柳树 苗 有 多少 株 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19116", "content": "一 本书 共 150 页 ， 小 明 已 看 完 它 的 (1/6) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6530", "content": "6 （ 2 ） 班 有 男生 21 人 ， 女生 比 男生 少 (1/7) ， 全班 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17886", "content": "张师傅 锯 一根 木料 ， 锯 了 3 次 ， 每 段 刚好 长 150 厘米 ． 这根 木料 长 多少 厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13049", "content": "商店 运 来 苹果 3.6 吨 ． 比 运 来 桔子 的 80% 少 0.4 吨 ． 商店 运 来 桔子 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21910", "content": "一 车间 有 女工 120 人 ， 男工 人数 比 女工 人数 的 2 倍 还 多 45 人 ， 男 女工 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2941", "content": "儿童 游乐场 的 门票 原来 每张 30 元 ， “ 春节 ” 期间 0.8 优惠 ， 刘老师 一家 3 口 去 游乐场 玩 ， 购买 门票 一共 能 省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22379", "content": "一 辆 汽车 行驶 6 千米 用油 (3/5) 千克 ， 平均 1 千克 油 行驶 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "504", "content": "工人 加工 一批 机器 零件 ， 第一天 完成 了 任务 的 (7/15) ， 第 二 天 完成 了 任务 的 (3/15) ， 两天 共 完成 了 这项 任务 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11852", "content": "甲 、 乙 两列 火车 分别 从 两站 同时 相向 开出 ， 甲 车 每 小时 行 85 千米 ， 乙 车 每 小时 行 105 千米 ， 经过 2.4 小时 相遇 ． 两站 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2327", "content": "一 根 长方体 木料 ， 长 8 m ， 横截面 的 面积 是 0.09 m2 ， 这根 木料 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "811", "content": "饲养场 有 100 只 鸡 ． 其中 鸭 占 鸡 的 (1/4) ． 鸭 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "941", "content": "一 个数 是 90 ， 减少 它 的 20% 后 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17173", "content": "回收 1 千克 废纸 ， 可 生产 0.8 千克 的 再生纸 ， 四年级 一共 有 125 人 ， 如果 每人 回收 1.5 千克 废纸 ， 四年级 回收 的 废纸 可 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14572", "content": "15 辆 卡车 用 8 次 运 了 600 吨 苹果 ， 一辆 卡车 一次 运 多少 吨 苹果 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17010", "content": "一 张 桌子 、 一张 椅子 和 一个 熨斗 共 540 元 ． 已知 一张 椅子 的 价格比 一个 熨斗 多 60 元 ， 桌子 单价 是 椅子 的 2 倍 ． 请问 一张 椅子 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16021", "content": "一 辆 汽车 3 小时 行驶 186 千米 ， 照 这样 计算 ， 从 甲地 到 乙地 共 434 千米 ， 这辆 汽车 需要 行 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7273", "content": "2008 年 北京 奥运会 ， 中国 夺得 了 51 枚 金牌 ， 比 美国 多 15 枚 ， 美国 得到 多少 枚 金牌 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22129", "content": "从 1997 年初 到 2002 年初 ， 北京市 5 年 共 发放 节 水龙头 319.5 万 只 ， 平均 每年 发放 多少 万 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5775", "content": "一 个数 的 60% 是 36 ， 这个 数 的 (1/3) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14329", "content": "一 套 课桌椅 的 价格 是 48 元 ， 其中 椅子 的 价格 是 课桌 的 (5/7) ． 课桌 的 价钱 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22086", "content": "新建 了 一座 现代 图书馆 ， 支出 1500 万 ， 实际 超过 计划 300 万 ， 超过 计划 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20211", "content": "学校 体育 室 买来 5 个 排球 ， 每个 排球 25 元 ， 还 买 了 3 个 足球 ， 一 共用 去 242 元 ， 每个 足球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15680", "content": "一 种 服装 今天 大减价 ， 比 原价 降低 了 25% ， 现价 是 原价 的 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5913", "content": "甲 、 乙 两个 小组 5 天 加工 1600 个 零件 ， 甲组 每天 加工 144 个 ， 乙组 每天 加工 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20240", "content": "电影院 原有 座位 48 排 ， 每排 24 座 ， 扩建 后 增加 了 84 个 座位 ， 现在 电影院 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4040", "content": "一 个 化肥厂 7 月份 生产 化肥 1104 吨 ， 比 计划 多 144 吨 ， 完成 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6766", "content": "商场 进 回 香蕉 800 千克 ， 梨 比 香蕉 少 25% ， 商场 进 回 梨 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11908", "content": "李 大伯 有 一块 菜地 ， 计划 利用 这块 地 的 (2/7) 种 白菜 ， (1/5) 种 芹菜 ， 其余 的 种 油菜 ， 种 油菜 的 地 占 这块 菜地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14135", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 前 4 小时 行 了 全程 的 (2/5) ， 照 这样 的 速度 ， 行 完全 程 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14416", "content": "甲 、 乙 两地 铁路 长 960 千米 ． 一列 货车 从 甲地 开往 乙地 ， 每 小时 行 58 千米 ， 同时 一列 客车 从 乙地 开往 甲地 ， 每 小时 行 62 千米 ， 过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22992", "content": "如果 一个 数 的 (4/5) 是 80 ， 那么 这个 数 的 (5/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15281", "content": "压路机 的 滚筒 是 一个 圆柱体 ， 它 的 底面 直径 是 1 米 ， 长 是 1.5 米 ． 如果 它 转 5 圈 ， 一共 压路 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "15893", "content": "商店 上午 卖出 布鞋 48 双 ， 下午 比 上午 多 卖出 14 双 ． 上午 和 下午 一共 卖出 布鞋 多少 双 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20934", "content": "半径 为 2 厘米 的 半圆 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "/", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "7572", "content": "小 军 昨天 写 63 个 毛笔字 ， 他 再 写 9 个 就是 小 英 昨天 写毛笔字 的 3 倍 ． 小 英 昨天 写 了 多少 个 毛笔字 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18282", "content": "把 一张 正方形 的 纸 剪成 边长 为 5 厘米 的 正方形 ， 比 剪成 边长 为 6 厘米 的 正方形 多 99 个 ， 两种 剪法 都 没有 余下 一点 纸片 ， 原来 这 张 正方形 纸 的 面积 = 多少 平方厘米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "377", "content": "李老师 家住 的 那 座 楼房 ， 每层 有 20 阶 楼梯 ， 李老师 家住 15 楼 ， 今天 停电 ， 李老师 只有 从 楼梯 走 回家 ， 李老师 从 一楼 到 家 共 走 了 多少 阶 楼梯 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13642", "content": "某 乡 去年 的 工业 总产值 8500 万元 ， 今年 的 工业 总产值 比 去年 多 20% ， 今年 的 工业 总产值 = 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13255", "content": "王 阿姨 去 买 3 个 足球 ， 付给 营业员 100 员 ， 找回 7 元 ． 平均 每个 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22923", "content": "张老师 15 分 打 了 480 个 字 ， 照 这样 的 速度 ， 一篇 有 1440 个 字 的 文章 ， 需要 几分钟 打 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9249", "content": "某校 有 学生 1200 人 ， 女生 占 65% ， 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8260", "content": "师徒 两 人 合作 加工 一批 零件 ， 8 小时 共 加工 了 1280 个 ， 师徒 每 小时 加工 88 个 ， 徒弟 每 小时 加工 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15584", "content": "水果店 上午 卖出 苹果 53.6 千克 ， 下午 卖出 的 苹果 比 上午 卖出 的 1.2 倍 还 多 5.08 千克 ， 全天 共 卖出 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3779", "content": "甲 、 乙 两班 共有 84 人 ， 甲班 人数 的 (5/8) 与 乙班 人数 的 (3/4) 共 58 人 ， 求 甲班 之 人数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22079", "content": "一 根 钢管 ， 用 去 25% ， 正好 用 去 (6/7) 米 ， 这根 钢管 还 剩 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13315", "content": "果园 里 有 桃树 120 棵 ， 苹果树 的 棵 树 相当于 桃树 的 (3/4) ． 苹果树 与 桃树 一共 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21806", "content": "食品厂 共 生产 威化 饼干 960 块 ， 平均 放在 4 个 纸箱 里 ， 每个 纸箱 里 有 8 个 盒子 ， 每个 盒子 装 多少 块 威化 饼干 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19376", "content": "小 明 在 超市 买 了 一瓶 墨汁 和 一盒 颜料 ． 一瓶 墨汁 4.5 元 ， 一盒 颜料 比 一瓶 墨汁 贵 0.8 元 ， 小 明 一共 需要 花 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19530", "content": "一 条 50 千米 长 的 公路 ， 已经 修 了 全长 的 (4/5) ， 还 剩 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19817", "content": "小 丁 看 一本 72 页 的 故事书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 全书 的 (1/8) ， 还 剩下 多少 页 没 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10582", "content": "商场 运进 苹果 60 箱 ， 运进 的 香蕉 比 苹果 多 20% ， 运进 的 香蕉 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1263", "content": "6 （ 1 ） 班 男女生 人数 的 比 是 9 ： 8 ， 已知 男生 27 人 ， 女生 有 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10836", "content": "修路 队 每天 修 135 米 ， 修 了 25 天 ， 还有 210 米 没有 修 ， 这 条 路 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2133", "content": "一 根 电线 先 用 去 (2/3) 米 ， 又 用 去 (3/4) 米 ， 还 剩 (1/12) 米 ． 这根 电线 原 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8024", "content": "一 段 绳子 175 米 ， 第一次 剪 去 22 米 ， 第 二 次 再剪 去 15 米 ， 这时 这根 绳子 比 原来 短 了 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16405", "content": "王老师 买 了 两本 参考书 ． 《 小学 数学 教学 指导 》 12.36 元 ， 《 数学 手册 》 比 《 小学 数学 教学 指导 》 多 4.25 元 ． 王老师 应付 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13377", "content": "道路 的 一边 一共 有 25 根 电线杆 ， 每 两根 电线杆 之间 有 一块 广告牌 ， 一共 有 多少 块 广告牌 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "430", "content": "学校 栽 了 一些 盆花 ． 如果 每个 教室 放 12 盆 ， 可以 放 24 个 教室 ． 如果 每个 教室 放 16 盆 ， 可以 放 多少 个 教室 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "985", "content": "养殖场 有 鸡 3200 只 ， 第一周 卖出 (3/8) ， 第 二 周 卖出 (2/5) ． 还 剩 多少 只 没 卖 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22438", "content": "水果市场 运 来 315 千克 桔子 ， 若 每 5 千克 装 一箱 ， 平均 分给 7 个 商店 ， 每个 商店 分 到 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19976", "content": "小 明 课余时间 看 一本 360 页 的 故事书 ， 计划 每天 看 60 页 ， 实际 每天 多 看 30 页 ， 这样 他 可以 比 原 计划 提前 几天 看 完 这本 故事书 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19323", "content": "家 友 超市 运 来 大米 14 袋 ， 每 袋 21 千克 ， 卖出 了 181 千克 后 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17885", "content": "学校 组织 队列训练 ． 如果 每行 站 18 人 ， 正好 站 15 行 ． 如果 每行 站 9 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16653", "content": "“ 十一 ” 期间 ， 鼓楼 服装城 所有 商品 一律 降价 (1/10) 销售 ． 妈妈 花 63 元 买 了 一件 衬衣 ， 比 原来 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9253", "content": "有 一只 刻度 均匀 但 不 准确 的 温度计 ， 将 它 放在 100 摄氏度 的 沸水 中 ， 示 数 为 99 摄氏度 ； 将 它 放在 0 摄氏度 的 冰水 中 ， 示 为数 为 4 摄氏度 ， 则 将 它 放在 25 摄氏度 的 教室 中 ， 示 数 为 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21732", "content": "一 台 织布机 6 小时 织布 1200 米 ， 照 这样 计算 ， 再 织 3 小时 ， 一共 织布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10078", "content": "24 个 0.79 相加 ， 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11997", "content": "水果 批发市场 有 橘子 480 千克 ， 苹果 比 橘子 少 25% ， 比 梨 多 12.5% ， 水果 批发市场 有 梨 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "937", "content": "修 一段 公路 ， 第一天 修 了 全长 的 (1/8) 少 40 米 ， 第 二 天 修 了 250 米 ， 这时 未 修 的 米 数 与 已修 的 米 数 比 是 1 ： 3 ， 这 段 公路 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16081", "content": "一 种 药水 的 浓度 是 20% ， 现在 有 药液 15 千克 ， 需要 加水 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4167", "content": "甲乙 两列 火车 同时 从 相距 756 千米 的 两地 相对 开出 ， 已知 甲 车 每 小时 行 70 千米 ， 乙 车 每 小时 行 56 千米 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15898", "content": "张 叔叔 要 买 汽车 需要 向 银行贷款 30000 元 ， 贷款 期限 为 3 年 ， 年利率 为 6.65% ． 到期 时 张 叔叔 应付 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2292", "content": "果园 里 有 苹果树 150 棵 ， 梨树 比 苹果树 多 50 棵 ， 橘树 棵 数 比 梨树 棵 数 的 3 倍 少 20 棵 ． 果园 里 有 橘树 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22009", "content": "一 个 钢厂 去 年产 钢 88 万吨 ， 今年 计划 比 去年 增产 15% ， 今年 计划 产 钢 多少 万吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6673", "content": "有 大米 250 千克 ， 比 面粉 多 25% ， 面粉 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7884", "content": "一 根 铁丝 的 (3/8) 是 (6/7) 米 ， 这根 铁丝 全长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22510", "content": "四年级 有 男生 124 人 ， 女生 120 人 ， 四年级 的 学生 数 正好 是 全校 人数 的 (1/6) ， 全校 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13891", "content": "小 明 看 一本 120 页 的 故事书 ， 已经 看 了 全书 的 (5/6) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3095", "content": "冰 化成 水 后 体积 减少 (1/12) ， 一块 冰 的 体积 是 36 立方分米 ， 化成 水 后 的 体积 = 多少 立方分米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21287", "content": "20 * 9 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15419", "content": "6 （ 1 ） 班 有 男生 23 人 ， 女生 22 人 ， 占 六年级 人数 的 (1/4) ， 六年级 有 学生 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8837", "content": "水果店 运 来 60 筐 水果 ， 其中 柑桔 占 (1/5) ， 苹果 占 (5/12) ， 其余 的 是 梨 ； 运 来 的 苹果 比 柑桔 多 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5340", "content": "一 辆 客车 在 高速 路上 的 速度 是 82 千米 / 时 ， 在 普通 路上 的 速度 是 58 千米 / 时 ， 这辆 客车 在 高速路 和 普通 路上 各行 了 3 小时 ． 这辆 客车 共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2387", "content": "共有 32 位 乒乓球 选手 参加 比赛 ， 最后 有 8 位 选手 参加 决赛 ， 参加 决赛 的 选手 占 所有 参赛选手 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6903", "content": "有 37 名 战士 要 过河 ， 只有 一只 小船 ， 一次 能 载 5 人 ， 需要 几次 才能 渡 完 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4952", "content": "一 个 商店 运 来 一批 蔬菜 ， 卖出 (2/5) ， 还 剩 440 千克 ， 这 批 蔬菜 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18118", "content": "超市 运 来 300 袋 大米 ， 每 袋 25 千克 ， 卖 了 296 袋 后 ， 还 剩下 多少 袋 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8892", "content": "林 林家 有 一些 大米 ， 爸爸 说 ： “ 已经 吃 了 30% ， ” 妈妈 说 ： “ 如果 再 买进 90 千克 ， 就 和 原来 一样 多 ． ” 林 林家 原来 有 多少 千克 大米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16065", "content": "一 列 客车 与 一列 货车 同时 从 a 地 相 背 而 行 ， 经过 4.5 小时 后 ， 两车 相距 643.5 千米 ． 已知 客车 每 小时 行 78 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1412", "content": "一 本 故事书 ， 原来 每页 排 576 字 ， 排 了 25 页 ． 再版 时 字 改 小 了 ， 只 需 排 18 页 ． 现在 每页 排 多少 个 字 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9224", "content": "6 个 百 除以 2 得 多少 个 百 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2751", "content": "4 个 空 筐 共 重 20 千克 ， 每 只 筐 装满 货物 后 重 25 千克 ， 问 装满 8 筐 后 ， 筐 中 的 货物 共 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18420", "content": "在 一个 比例式 中 ， 组成 内 项 的 两个 数 分别 是 8 和 0.5 ， 其中 的 一个 外 项 是 4 ， 那么 另 一个 外 项 一定 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6808", "content": "一 台 电视机 价格 由 1000 元 降到 860 元 ， 这种 电视机 降价 百分之几 ？ （ ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8607", "content": "一 只 蝴蝶 0.5 时 飞行 3.9 千米 ， 一只 蜜蜂 的 飞行速度 是 这 只 蝴蝶 的 2.4 倍 ． 这 只 蜜蜂 每 时 飞行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15066", "content": "客车 和 货车 同时 从 甲乙 两地 出发 相向 而 行 ， 5 小时 相遇 ， 相遇 后 客车 又 行 了 3 小时 到达 乙地 ． 已知 货车 每 小时 行 72 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20722", "content": "水果店 卖出 4 箱 苹果 ， 每箱 25 千克 ， 还 剩 125 千克 ， 水果店 原有 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "82", "content": "小 丁丁 去 水果店 买 苹果 ， 按 原价 每千克 5.2 元 ， 他 带 的 钱 正好 可以 买 8 千克 ； 而 实际 苹果 现价 每千克 4 元 ， 现在 他 带 的 钱 最 多 可以 买 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3912", "content": "一 个数 的 5.4 倍 是 12.42 ， 这个 数 的 3.1 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11043", "content": "红 、 黄 、 蓝 3 种颜色 的 小 棒 各 10 根 混 放在 一起 ． 如果 让 你 闭上眼睛 ， 至少 拿出 多少 根 才能 保证 一定 有 2 根 不同 色 的 小 棒 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6347", "content": "一 条 公路 已 修好 全长 的 (4/7) ， 把 多少 看做 单位 “ 1 ” ， 还 剩下 多少 没有 修好 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10329", "content": "用 写 有 1 、 2 、 3 的 3 张 卡片 ， 一共 可以 组成 多少 个数 ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "2419", "content": "水果 公司 运 来 60 吨 水果 ， 水果 总量 的 (7/12) 是 苹果 ， 在 苹果 中 ， 青苹果 又 占 (2/9) ， 这 批 水果 中 青苹果 有 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15504", "content": "小 红 和 小林 去 买 同样 的 故事书 ， 小 红 买 了 7 本 ， 小林 买 了 5 本 ， 小 红 用 的 钱 比 小林 多 36 元 ． 这种 故事书 每 本 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14707", "content": "学校 运动会 跳高 比赛 中 ， 小 华 跳 了 1.3 米 ， 小 刚 比 小 华 多 跳 了 0.15 米 ， 小强 跳 的 高度 比 小 刚 低 0.05 米 ， 小强 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7727", "content": "节日期间 商场 进行 促销 活动 ， 一种 电冰箱 原价 3850 元 ， 现价 3080 元 ． 现价 是 原价 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10989", "content": "刘 奶奶 买 了 3 千克 桔子 ， 花 了 8 元 钱 ， 李 奶奶 买 了 同样 的 桔子 9 千克 ， 应付 多少 元 钱 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19342", "content": "每 两盏 路灯 之间 的 距离 都 是 40 米 ， 那么 第 1 个 路灯 与 第 9 个 路灯 之间 相距 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1451", "content": "兰兰 和 亮 亮 各 有 一些 邮票 ， 已知 兰兰 的 邮票 数 占 两 人 总数 的 60% ， 当 兰兰 借给 亮 亮 20 张 后 ， 兰兰 和 亮 亮 邮票 张 数 的 比 是 2 ： 3 ． 两 人 共有 邮票 多少 张 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2057", "content": "六年级 的 男生 人数 是 女生 人数 的 (4/11) ， 那么 男生 人数 占 全年 级 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10027", "content": "某人 运 玻璃杯 1000 个 ， 每 只 的 运费 是 0.5 元 ， 若 破损 一个 须 赔偿 8 元 ， 此人 共 得 运费 449 元 ， 问 搬运 过程 中 破损 了 几只 玻璃杯 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11099", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 45 千米 ， 2.4 小时 后 行 了 全程 的 30% ， 甲 、 乙 两地 相距 多 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16711", "content": "鄱阳湖 的 面积 是 3960 平方千米 ， 洞庭湖 的 面积 比 鄱阳湖 面积 的 (1/3) 大 1500 平方千米 ， 洞庭湖 的 面积 = 多少 平方千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17595", "content": "骑车 从 甲地 到 乙地 ， 如果 每分钟 骑 206 米 ， 13 分钟 到达 ， 甲地 到 乙地 的 路程 大约 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10140", "content": "王老师 要 批改 48 篇 作文 ， 已经 批改 了 12 篇 ． 如果 每 小时 批改 9 篇 ， 还要 多少 小时 能够 批改 完 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21079", "content": "学校 买 回 12 箱 粉笔 ， 每箱 10 盒 ， 每盒 60 支 ， 共有 粉笔 多少 支 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14728", "content": "学校 买来 810 本 练习册 ， 一年级 领走 168 本 ， 二年级 领走 165 本 ， 还 剩 多少 本 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14348", "content": "李老师 上 学期 到 商店 买 15 支 钢笔 奖励 给 3 好 学生 ， 下学期 又 去 买 了 同样 的 钢笔 18 支 ． 李老师 上 学期 比 下学期 少付 6 元 ， 你 能 算 出 每支 钢笔 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "84", "content": "浓度 为 20% 的 80 克 糖水 中 ， 加多少 克 水 就 得到 浓度 为 8% 的 糖水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4561", "content": "某班 有 学生 40 人 ， 对 数学 有 兴趣 的 有 17 人 ， 对 音乐 有 兴趣 的 有 13 人 ， 两样 都 有 兴趣 的 有 8 人 ． 两样 都 没有 兴趣 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22452", "content": "一 个数 的 (2/5) 是 18 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15640", "content": "一 个 羊场 养 绵羊 2000 只 ， 比 山羊 的 只 数多 (1/3) ， 这个 羊场 有 山羊 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15597", "content": "星期日 ， 笑笑 买 书 用 去 80 元 ， 是 爸爸 给 的 钱 的 (4/5) ， 爸爸 给 了 笑笑 多少 元 钱 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22485", "content": "饲养 组 养鸡 36 只 ， 养鸭 的 只 数 比 鸡 多 (5/9) ． 养鸭 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4235", "content": "一 根 绳子 长 46 米 ， 第一次 用 去 12.5 米 ， 第 二 次 用 去 23.6 米 ， 这时 绳子 比 原来 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9284", "content": "工程队 3 天 完成 了 一项 工程 的 (1/8) ， 完成 全 项 工程 需 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3703", "content": "有 含盐 16% 的 盐水 40 千克 ， 蒸发 多少 千克 水 后 可 将 浓度 提高 到 20% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7983", "content": "两个 工程队 共建 一项 工程 ， 甲队 每天 完成 这 工程 的 (1/8) ， 乙 队 每天 完成 这项 工程 的 (1/9) ， 两个 工程队 一天 可以 完成 这项 工程 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14473", "content": "一 列 货车 和 一列 客车 从 甲 、 乙 两地 同时 相对 开出 ， 已知 客车 的 速度 是 每 小时 60 千米 ， 货车 的 速度 是 客车 的 (4/5) ， 两者 开出 后 4 小时 相遇 ， 那么 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8667", "content": "淮安 与 南京 相距 200 千米 ， 歌手 张 绍 函 从 南京 赶到 淮安 参加 美食 文化节 文艺演出 ， 已经 行 了 全程 的 (3/4) ， 离 南京 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2868", "content": "学校 有 一个 平行四边形 菜园 ， 底边 长 36 米 ， 高 28 米 ， 每平方米 栽 9 棵 大白菜 ， 这块 菜地 一共 可以 栽 多少 棵 大白菜 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12281", "content": "一 条 路 ， 已经 修 了 249.6 m ， 是 没有 修 的 2.4 倍 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18004", "content": "杉 阳 镇 今年 修 公路 20 千米 ， 比 去年 的 (1/2) 还 多 5 千米 ． 去年 修 公路 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16278", "content": "被除数 是 4 ， 商 是 1.8 ， 余数 是 1.3 ， 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19203", "content": "林荫道 的 一侧 两端 共 栽 了 8 棵 树 ， 相邻 两棵树 间隔 5 米 ， 林荫道 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18216", "content": "学校食堂 买 8 箱 苹果 ， 每箱 重 9 千克 ， 又 买来 了 28 千克 鸭梨 ， 一共 买 了 多少 千克 的 水果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2813", "content": "比 32 的 17 倍 少 56 的 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1112", "content": "甲 数 的 (3/5) 与 乙 数 的 40% 一样 多 ， 乙 数 是 30 ， 甲 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13371", "content": "一 条 裤子 75 元 ， 一件 上衣 比 它 贵 25 元 ． 买 一套 这样 的 衣服 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19171", "content": "成人 体内 血液 约 是 体重 的 (1/13) ， 血液 中 含有 48% 的 水 ． 李 叔叔 的 体重 是 78 千克 ， 他 的 血液 中 含有 多少 千克 水 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12200", "content": "一 个 长方形 花坛 长 2.8 米 ， 宽 2.5 米 ， 如果 每平方米 能 培植 鲜花 20 支 ， 这个 花坛 一共 可以 培植 鲜花 多少 支 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18949", "content": "张 明 和 李 莉 早上 7 时 出发 去 学校 ， 张 去 学校 的 路程 比 李 多 (1/4) ， 而 李 去 学校 的 时间 比 张 少 (1/9) ， 那么 李 的 速度 是 张 速度 的 多少倍 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13849", "content": "一 个 服装厂 现在 做一套 衣服 比 原来 节省 布 0.15 米 ， 原来 做 240 套 这种 衣服 所用 的 布 ， 现在 可以 多 做 15 套 ， 原来 做一套 衣服 用布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "192", "content": "白酒 的 商标 上 写 着 ： 酒精度 45% ， 净 含 题 50 ml ， 这 瓶 酒 含水 多少 ml ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8581", "content": "计算 ： 12345 * 2345 + 2469 * 38275 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8344", "content": "一 个 三角形 的 面积 是 2.7 m ^ 2 ， 高 是 3.6 m ， 它 的 底 应 = 多少 m ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15216", "content": "修路 队 修 一段 长 800 m 的 公路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 全长 的 (3/8) ． 两天 一共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14786", "content": "为 支援灾区 ， 胜利 小学 五年级 6 个 班 平均 每班 捐款 120 元 ， 六年级 8 个 班 平均 每班 捐款 140.5 元 ． 两个 年级 一共 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13737", "content": "从 上饶 到 温州 的 公路 长 大约 是 180 千米 ． 5 一 假期 ， 小 明 一家 自驾游 从 上饶 出发 到 温州 野生 动物园 游玩 ， 如果 走 高速公路 每 小时 行 90 千米 ； 如果 走 国道 每 小时 行 60 千米 ． 走 高速公路 比 走 国道 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11501", "content": "6 （ 2 ） 班 同学 课间 分 点心 ， 生活 委员 领 来 225 个 荔枝 ， 按 比例 平均 分给 20 个 女生 和 25 个 男生 ， 女生 一共 分 到 多少 个 荔枝 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7718", "content": "学校 有 排球 20 个 ， 排球 的 个数 是 篮球 的 (4/5) ， 篮球 个数 是 足球 的 (5/6) ， 足球 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8105", "content": "李 明 的 体重 是 35.5 千克 ， 刘 晶 的 体重 是 李 明 的 1.2 倍 ， 刘 晶 比 张 华 轻 3.2 千克 ， 张 华 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4213", "content": "2012 年 7 月 21 日 ， 北京 遭遇 61 年 来 强降雨 ， 部分 地区 受 山洪 影响 严重 ， 洪灾 后 各地 展开 灾 后 重建 ． 一座 重建 楼 有 6 层 ， 4 个 单元 ， 共 住 有 216 户 ． 每个 单元 每层 住 多少 户 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15195", "content": "甲 、 乙 两 数 的 比 是 5 ： 3 ， 差 是 18 ， 它们 的 和 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7288", "content": "甲 数 的 (2/5) 是 40 ， 甲 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12849", "content": "织 一批 布 ， 第一天 织 了 总数 的 (1/5) ， 第 二 天 织 了 100 米 ， 还 剩下 总数 的 (7/15) ． 这 批 布 一共 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11392", "content": "甲乙 两队 合 挖 一条 隧道 ， 甲队 每天 挖 75 m ， 乙 队 每天 挖 50 m ， 两队 合作 8 天 后 完成 任务 ， 这 条 隧道 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16392", "content": "36 个 同学 参加 风筝 比赛 ， 平均 分成 9 组 ， 每组 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16840", "content": "小 明 走路 从 家 到 学校 用 了 0.7 小时 ， 他 每 小时 走 4.3 千米 ， 小 明 家 到 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15537", "content": "一 种 收录机 售价 450 元 ， 比 原价 降低 了 150 元 ． 比 原价 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18257", "content": "果园 里 收获 了 375 千克 苹果 ， 把 这些 苹果 平均 装进 9 个 筐 里 ， 还 剩 15 千克 ． 每 筐 装 了 多少 千克 苹果 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4324", "content": "一 辆 汽车 从 甲 城 去 乙 城 ， 它 每 小时 行驶 70 千米 ， 行驶 了 4 小时 距 乙 城 还有 35 千米 ， 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18148", "content": "从 (2/5) 的 倒数 里 减去 它 的 (1/2) ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9248", "content": "一 根 木棍 长 6.5 米 ， 第一次 截去 3.65 米 ， 第 二 次 截去 1.95 米 ． 这根 木棍 比 原来 短 了 几米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20645", "content": "甲 数 的 (2/3) 是 8 ， 乙 数 是 20 的 (4/5) ， 甲 、 乙 两 数 的 差 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5604", "content": "一 堆 煤运 走 了 25 吨 ， 刚好 是 总 吨数 的 (5/12) ． 若 运走 的 是 总 吨数 的 60% ， 那么 运走 的 = 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1464", "content": "载重汽车 以 每 小时 45 千米 的 速度 自 a 城 开往 b 城 ． 它 出发 了 3 小时 后 另 有 一辆 轻便 汽车 自 b 城 出发 往 a 城 ， 它 每 小时 比 载重汽车 快 15 千米 ． 若 两城 相距 345 千米 ， 轻便 汽车 出发 几小时 后 可 与 载重汽车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11503", "content": "一 列 火车 3 小时 可行 327 千米 ， 照 这样 的 速度 计算 ， 从 成都 到 北京 需要 19 小时 ， 成都 到 北京 的 铁路 大约 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7334", "content": "商店 运 来 10 箱 苹果汁 和 12 箱 橘子汁 ． 已知 ， 每箱 装有 24 瓶 ， 商店 一共 运 来 多少 瓶 饮料 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "898", "content": "能 同时 被 3 、 5 、 7 除 余数 为 1 的 最小 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1691", "content": "同学 参加 “ 6 一 ” 体操 表演 ， 每 横排 人数 同样 多 ， 每 竖排 人数 也 同样 多 ． 王 菁 的 位置 是从 左 数 第 10 人 ， 从 右 数 第 6 人 ， 从前 数 第 12 人 ， 从 后 数 是 第 9 人 ． 参加 表演 的 同学 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "17744", "content": "养鸭 1200 只 ， 鸭 的 只 数 比 鹅 多 (1/5) ， 养 鹅 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15920", "content": "修 一条 公路 ， 计划 每天 修 60 米 ， 实际 每天 比 计划 多 修 15 米 ， 结果 提前 3 天 修 完 ． 这 条 公路 长 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3916", "content": "钢琴 的 黑 键 有 48 个 ， 比 白 键 少 15 个 ， 白 键 有 多少 个 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "87", "content": "公园 外围 一圈 是 1.09 公里 ， 24 小时 超级 马拉松 比赛 ， 小名 跑 了 140 圈 ， 一共 跑 多少 公里 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17326", "content": "李 奶奶 把 50000 元 钱 存入 银行 ， 定期 3 年 ， 年利率 为 5.40% ， 到期 后 李 奶奶 可以 从 银行 取回 多少 钱 ？ （ 按照 国家 规定 ， 存款 的 利息 按 5% 的 税率 纳税 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "7793", "content": "甲 、 乙 两 数 的 比 是 5 ： 8 ， 甲 数 是 25 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18421", "content": "1 - 0.12 + (1/2) - 0.34 + (1/3) - 0.56 + (1/5) - 0.78 = ．", "knowledge": ["+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "1761", "content": "[ 1.65 / ( (1/4) + 0.8 ) - ( 0.5 + (1/3) ) * (24/35) ] / ( (3/4) - (1/2) ) 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "6381", "content": "一 个 车轮 的 直径 为 55 厘米 ， 车轮 转动 一周 ， 大约 前进 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19729", "content": "一 袋 大米 重 20 千克 ， 多少 袋 大米 重 100 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15716", "content": "王老师 每月 工资 1480 元 ， 按规定 超过 800 元 的 部分 按 (5/100) 缴纳 个人所得税 ， 王老师 每月 应 缴纳 多少 个人所得税 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1953", "content": "（ 3.9 + 7.75 - 9.375 ） / （ 0.4875 - 0.4 ） = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "832", "content": "修建 一座 厂房 ， 计划 投资 12.5 万元 ， 实际 只用 了 10 万元 ， 实际 投资 比 计划 节约 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13976", "content": "一 节 火车车厢 ， 从 里面 量 ， 长 10 m ， 宽 2.7 m ， 装 的 煤 高 1.5 m ． 每 立方米 煤 重 2 吨 ． 这 节车厢 里 的 煤 重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "184", "content": "一 个数 除以 8 ， 商 是 32 ， 余数 是 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "900", "content": "一 双 布鞋 25.85 元 ， 一双 皮鞋 比 一双 布鞋 贵 165.25 元 ， 爸爸 买 一双 皮鞋 付给 售货员 200 元 ． 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18483", "content": "一 个 比 的 比值 是 (3/4) ， 它 的 前项 是 12 ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20013", "content": "一 个数 除以 9 ， 商 是 99 ， 余数 是 8 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21327", "content": "一 名 成年人 身上 的 血液 约 占 重重的 (1/13) ． 体重 65 千克 的 人 ， 血液 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5803", "content": "夏天 来 了 ， 某校 买 了 20 台 空调 ， 合格率 为 95% ， 厂家 应 准备 多少 台 空调 以备 调换 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9478", "content": "每桶 水 约 重 24 千克 ， 送 水 叔叔 每天 送 10 桶 水 ， 他 每天 送 多少 千克 水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3341", "content": "6 （ 2 ） 班 女生 的 平均 身高 是 150 cm ， 如果 以 平均 身高 为 标准 ， 张 丽 的 身高 记 为 + 8 cm ， 那么 张 丽 的 实际 身高 = 多少 cm ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6991", "content": "口袋 里 装有 4 个 红球 ， 3 个 白 球 ， 任意 摸 出 一个 球 ， 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9443", "content": "一 个 长方体 玻璃缸 ， 从 里面 量 长 40 厘米 ， 宽 25 厘米 ， 缸内 水深 10 厘米 ． 把 一块 石头 浸入 水中 后 ， 水面 升 到 12 厘米 ， 求 石块 的 体积 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7503", "content": "(5/6) - (2/3) * (5/8) = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5922", "content": "学校 买 回 铅笔 30 枝 ， 每枝 8 元 ， 买 铅笔 一共 花 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5688", "content": "某 型号 微波炉 打 0.9 后 是 360 元 ， 这种 微波炉 打折 后 比 原价 要 便宜 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6986", "content": "一 批 产品 的 合格率 是 80% ， 不 合格 产品 占 合格 产品 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1741", "content": "舟山 是 个 缺水 的 海岛 小城 ， 我们 每个 舟山 市民 都 要 节约用水 ． 一个 人 用 浴缸 洗 一次 澡 大约 用水 125 升 ， 如果 改为 淋浴 ， 用 25 升水 就 够 了 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12243", "content": "草原 上 有 一群 羊 ， 山羊 只 数 的 (2/3) 与 绵羊 只 数 的 (2/9) 相等 ， 已知 山羊 有 72 只 ， 绵羊 有 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10155", "content": "我 的 身高 是 1.21 米 ， 比 表妹 高 0.49 米 ， 而 舅舅 身高 又 比 表妹 高 1.08 米 ， 舅舅 身高 = 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22487", "content": "在 一次 测试 中 ， 刘 涛 科学 考 了 84 分 ， 张 良 伟 比 刘 涛 少 考 (1/7) ， 张 良 伟 考 了 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19064", "content": "把 0.593 再 增加 7 个 多少 就是 0.6 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6043", "content": "兄妹 两 人 由 家 到 学校 ， 妹妹 步行 每分钟 走 45 米 ， 哥哥 骑车 每分钟 行 195 米 ． 妹妹 走 20 分钟 后 ， 哥哥 骑车 离家 ， 几分钟 后 追 上 妹妹 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10915", "content": "双语 小学 食堂 买来 1 筐 西红柿 和 3 筐 同样 的 青菜 ． 西红柿 重 50 千克 ， 青菜 共 重 90 千克 ． 每 筐 西红柿 比 每 筐 青菜 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11484", "content": "学校 兴趣小组 共有 36 人 ， 其中 男女生 人数 比 是 7 ： 2 ． 后 又 有 一些 男生 参加 ， 男生 占 总数 的 80% ． 现在 数学 兴趣小组 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4897", "content": "小 刘 和 小 李 在 5 天 内 合 做 了 340 个 零件 ， 已知 小 刘 平均 每天 做 60 个 ， 小 李 平均 每天 做 几个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18226", "content": "学校 买 一批 书 ， 其中 文艺 书 有 600 本 ， 科技 书 比 文艺 书 多 (1/3) ， 学校 共 买 文艺 书 和 科技 书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20956", "content": "亮 亮 买 一套 书 ， 在 网上 购买 只用 了 105 元 ， 比 在 书店 购买 便宜 (1/8) ， 在 书店 购买 这 套书 需要 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8478", "content": "华山 小学 三年级 栽树 56 棵 ， 四年级 栽 112 棵 ， 五年级 栽 的 比 3 、 四年级 总数 的 2 倍 少 10 棵 ． 五年级 栽树 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6863", "content": "小 刚 在 计算 除法 时 ， 把 除数 42 写成 24 ， 结果 得 360 ． 正确 的 商 应该 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2012", "content": "一 只 大象 重 5.1 吨 ， 是 一头 牛 体重 的 15 倍 ． 这 头 大象 比 这 头 黄牛 重 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21680", "content": "某 文具店 ， 商品 的 标价 比 进货价 提高 (1/3) ， 则 进货价 比 标价 少 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21071", "content": "一 列 火车 从 济南 开往 北京 ， 当 列车 到达 天津站 时 有 20% 的 人 下车 ， 在 天津站 又 有 48 人 上车 ， 这时 车上 的 旅客 只有 原来 的 (7/8) ， 从 天津 下车 的 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6355", "content": "小张 从 1 楼上 到 5 楼 要 36 秒 ， 照 这样 计算 ， 他 从 2 楼上 到 7 楼 要 用 多少 秒 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3054", "content": "一 批 水泥 重 30 吨 ， 第一次 用 去 总数 的 30% ， 第 二 次 用 去 总数 的 (1/6) ， 还 剩下 多少 吨 水泥 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "933", "content": "小 方 在 计算 小数 除法 算式 时 ， 错 把 除数 0.6 写成 6.6 计算 ， 得出 结果 是 3.2 ． 正确 结果 应该 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10306", "content": "5 米 长 的 铁丝 ， 用 去 (3/5) 米 ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16172", "content": "学校食堂 运 来 一批 煤球 ， 计划 每天 烧 煤球 6 块 ， 可 烧 40 天 ， 改进 炉灶 后 ， 可 烧 60 天 ， 现在 每天 烧 煤球 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10061", "content": "多少 除以 23 ， 商 与 余数 都 是 12 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15538", "content": "6 （ 1 ） 班 有 学生 45 人 ， 其中 男生 占 (4/9) ， 有 (1/10) 的 男生 眼睛 近视 ， 近视 的 男生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20273", "content": "建筑工地 计划 运进 一批 水泥 ， 第一次 运 来 总数 的 25% ， 第 二 次 运 来 180 吨 ， 这时 运 来 的 与 没 运 来 的 吨数 比 是 4 ： 3 ， 工地 计划 运进 的 这 批 水泥 = 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2701", "content": "奶奶 带 了 500 元 和 芳 芳 逛商场 ， 一套 运动服 245 元 ， 一双 运动鞋 155 元 ． 奶奶 买 这 两样 商品 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17907", "content": "一 个 长方形 的 面积 是 3 平方米 ， 它 的 宽 是 (3/5) 米 ， 则 它 的 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6274", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行驶 32 千米 ， 需要 5 小时 ． 如果 每 小时 行驶 40 千米 ， 需要 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2872", "content": "畜牧场 有 奶牛 250 头 ， 奶牛 头数 是 肉牛 头数 的 (2/5) ， 畜牧场 有 肉牛 多少 头 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8332", "content": "某 家具厂 要 生产 一批 沙发 ， 第一周 生产 了 64 套 ， 第 二 周 生产 了 86 套 ， 两周 生产 了 这 批 沙发 总数 的 (3/10) ． 家具厂 还要 生产 多少 套 沙发 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14425", "content": "一 台 液晶电视 原价 5600 元 ， 现在 降价 (5/14) 出售 ， 现价 比 原价 降低 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7229", "content": "学校 体育 室 买来 排球 32 只 ， 相当于 足球 只 数 的 (8/9) ． 买来 足球 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15735", "content": "被减数 是 180 ， 减数 与 差 的 比 是 2 ： 3 ， 差 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19003", "content": "妹妹 的 邮票 120 张 ， 比 姐姐 少 (1/3) ， 姐姐 的 邮票 多少 张 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9070", "content": "一 缸 水 ， 用 去 (1/2) 和 5 桶 ， 还 剩 30% ， 这 缸 水 有 多少 桶 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11111", "content": "机床厂 本月 生产 机床 240 台 ， 比 上 月 超产 (3/5) ， 上 月 生产 了 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6174", "content": "四年级 一班 买 作业本 264 本 ， 二 班 买 作业本 270 本 ， 每人 发 作业本 6 本 ， 两班 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21069", "content": "有 一堆 煤 ， 运出 (4/9) 后 ， 又 运进 210 吨 ． 这时 的 存 煤 量 是 原来 的 (3/4) ． 原来 有 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22884", "content": "为了 庆祝 “ 6 一 ” 儿童节 ， 王老师 为 小朋友 们 购买 演出 用 的 服装 ， 买 3 件 t恤 和 5 条 短裤 的 钱 同样 多 ， 每 条 短裤 69 元 ， 每件 t恤 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9205", "content": "一 个 挂钟 ， 分针 针尖 的 长度 是 3 厘米 ． 从 1 时 到 2 时 ， 分针 走过 了 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7075", "content": "(2121/2323) * (171717/212121) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4085", "content": "红旗 小学 买来 320 套 新 课桌椅 ， 每张 桌子 35 元 ， 每 把 椅子 26 元 ． 红旗 小学 买 这些 新 桌椅 一 共用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21676", "content": "123 + 456 + 877 + 544 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11397", "content": "三年级 有 84 个 同学 去 果园 劳动 ， 4 个 同学 分成 一组 ， 每组 摘 苹果 58 千克 ． 一共 摘 了 多少 千克 苹果 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21733", "content": "一 条 环形 跑道 长 400 米 ， 小强 每分钟 跑 300 米 ， 小 星 每分钟 跑 250 米 ， 两 人 同时 同 地 同 向 出发 ， 经过 多长时间 小强 第一次 追 上 小 星 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9644", "content": "学校 买 了 4 副 羽毛球拍 和 8 副 乒乓球拍 ， 共 付 了 357.6 元 ． 每 副 羽毛球拍 25.4 元 ， 每 副 乒乓球拍 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4717", "content": "一 个 长方形 的 面积 是 10.8 平方米 ， 这个 长方形 的 长 是 9 米 ， 它 的 宽 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17652", "content": "王 强 带 了 12.5 元 去 商店 ， 买 了 8 个 练习本 ， 还 剩 6.5 元 ， 每个 练习本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5047", "content": "玩具厂 生产 一批 皮球 ， 运走 了 24 箱 白 皮球 和 12 箱 花 皮球 ， 若 是 每箱 9 个 皮球 ， 一共 运走 了 多少 个 皮球 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21298", "content": "童星 玩具厂 生产 一批 玩具 ， 原 计划 每天 生产 64 个 ， 5 天 做 完 ， 实际 4 天 就 完成 了 任务 ， 实际 每天 比 原 计划 每天 多 做 多少 个 玩具 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8088", "content": "李老师 计划 买 12 个 足球 ， 每个 128 元 ， 15 个 篮球 ， 每个 65 元 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5441", "content": "小 明 借来 一本 故事书 ， 如果 每天 读 8 页 ， 15 天 可以 读完 ． 现在 要 12 天 读完 ， 每天 应该 读 几页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10696", "content": "有 2400 只 铅笔 ， 每 12 只 装 一盒 ， 每 20 盒装 一箱 ， 这些 铅笔 需要 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5880", "content": "一 种 商品 打 0.8 销售 ， 如果 这种 商品 原价 50 元 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20160", "content": "粮店 上午 运进 120 大米 袋 ， 下午 比 上午 的 2 倍 多 40 袋 ， 这天 共 运进 大米 多少 袋 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13993", "content": "有 一个 圆形 花坛 ， 一周 120 米 ， 每隔 6 米 种 一棵 紫丁香 ， 每 两棵 紫丁香 中间 种 一棵 月季花 ， 紫丁香 和 月季花 各 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10808", "content": "有 两块 木板 ， 长 都 是 60 厘米 ， 中间 钉 在 一起 的 部分 是 10 厘米 ， 那么 钉 成 后 的 木板 长 多少 厘米 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "21991", "content": "学校 有 一条 60 米 的 长廊 ， 计划 每隔 3 米 放 一 盆花 ， 如果 两端 不 放 ， 能 放 几 盆花 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5606", "content": "一 捆 电线 长 1000 米 ， 用 去 了 700 米 ． 剩下 的 比 用 去 的 少 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14975", "content": "3 个 成人 带领 几个 学生 去 公园 ， 成人 票价 每人 18 元 ， 学生 票价 比 成人 票价 低 6 元 ． 如果 买 门票 共 花 去 186 元 ， 那么 学生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18998", "content": "一 批 货物 ， 先 运进 总量 的 (1/4) ， 又 运出 30 吨 ， 这时 比 原来 多 10 吨 ， 原来 存 货物 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12881", "content": "做一套 衣服 要 3 米 长 的 布 ， 有 一块 54 米 长 的 布 ， 可以 做 多少 套 衣服 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17467", "content": "普通 特快 列车运行 速度 可 达 180 千米 / 时 ， “ 和谐 号 ” 动车 比 它 快 (17/18) ． “ 和谐 号 ” 动车 的 速度 比 普通 特快 列车 快 多少 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "924", "content": "学校食堂 运 来 大米 和 面粉 各 80 袋 ， 大米 每 袋 75 kg ， 面粉 每 袋 25 kg ， 面粉 比 大米 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1533", "content": "为 庆祝 6 一 儿童节 ， 六年级 同学 要 做 一些 彩旗 ， 已经 做 了 60% ， 还要 做 80 面 彩旗 才能 完成 任务 ． 同学 们 一共 要 做 多少 面 彩旗 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1447", "content": "张 阿姨 的 玩具店 本月 卖掉 了 65 辆 玩具车 ， 207 个 布娃娃 ． 如果 每辆 玩具车 可以 赚 3 元 ， 每个 布娃娃 可以 赚 5 元 ， 本月 她 一共 赚 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14588", "content": "（ 0.72 * 0.75 * 0.076 ） / （ 0.19 * 0.144 * 37.5 ） = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13728", "content": "某 工程队 计划 修 一条 15 千米 的 水渠 ， 开工 3 天 修 了 1.8 千米 ． 照 这样 计算 ， 修 完 这 条 水渠 一共 要 用 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17777", "content": "水果店 有 苹果 180 千克 ， 卖出 (1/5) 后 ， 剩下 的 重量 正好 是 橘子 的 60% ， 水果店 橘子 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9563", "content": "陈 叔叔 把 一车 货物 送到 商场 ， 去 时 的 速度 60 千米 / 时 ， 用 了 5 小时 送到 ， 返回 时 只用 了 4 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14983", "content": "小 东 看 一 本书 ， 每天 看 24 页 ， 6 天 后 还 剩 全书 的 (3/5) 没 看 ， 这 本书 = 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17898", "content": "笑笑 过生日 ， 爸爸 买 了 一个 蛋糕 ， 笑笑 吃 了 (1/3) ， 爸爸 和 妈妈 各 吃 了 (1/4) ， 这个 蛋糕 还 剩 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22001", "content": "420.5 - 294 / 2.8 * 2.1 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12147", "content": "某 工程队 修筑 一段 公路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 剩下 部分 的 (3/10) 又 24 米 ， 第 3 天 修 的 是 第一天 的 (3/4) 又 60 米 ， 正好 全部 修 完 ． 这 段 公路 全长 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "10479", "content": "一 个 养花 基地 ， 计划 用 总面积 的 (2/5) 种 玫瑰花 ， (1/3) 种 菊花 ， 其余 的 种 百合花 ． 种 百合花 的 面积 占 总面积 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11935", "content": "某校 六年级 有 住宿生 240 人 ， 占 全校学生 人数 的 (1/6) ， 已知 全校学生 中 有 (5/9) 为 走读生 ， 那么 该校 共有 多少 住宿生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "64", "content": "被减数 比 减数 多 25 ， 比 差 多 52 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13537", "content": "江南 摩尔 李宁 专场 店 ， 国庆 那天 上午 卖出 同 一款 运动鞋 8 双 ， 下午 卖出 同样 的 运动鞋 14 双 ， 下午 比 上午 多 卖 1227.6 元 ． 这 一天 共 卖 得 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4255", "content": "养鸡 厂 星期一 收 鸡蛋 ， 28 千克 装 一箱 ， 装 好 8 箱 后 还 剩 26 千克 ． 星期一 收 了 多少 千克 鸡蛋 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15443", "content": "李 叔叔 从 某 城市 乘火车 去 北京 用 了 12 小时 ， 火车 的 速度 每 小时 大约 行驶 145 千米 ． 该 城市 到 北京 大约 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10737", "content": "葡萄 7 千克 售 55 元 ， 现有 33 元 ， 可以 购买 葡萄 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15905", "content": "化肥厂 计划 二 月份 用电 12000 度 ， 实际 节约 了 (1/8) ． 实际 节约 了 多少度 电 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19424", "content": "一 台 彩色 电视机 原价 2400 元 ， 现在 打 0.8 售出 ， 现在 的 售价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5559", "content": "南 城区 的 小学 数学 竞赛题 共 25 道 ， 做 对 一 题 得 8 分 ， 做 错 一 题 倒扣 4 分 ， 不 做 不 记分 ， 也 不 扣分 ． 李 明 做 了 15 道 题 共 得 72 分 ， 他 做 对 了 多少 道 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22941", "content": "一 桶 油 ， 如果 倒 出 32 千克 ， 还 剩 (3/5) ． 这 桶 油 原来 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13860", "content": "某 工厂 去年 总产值 2300 万元 ， 比 前年 增加 15% ， 这个 工厂 前年 的 总产值 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12718", "content": "我校 食堂 买来 一些 大米 ， 6 天 吃 了 240 千克 ， 照 这样 计算 ， 剩下 的 吃 了 8 天 ， 学校 一共 买来 多少 千克 大米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11483", "content": "水果 商店 运 来 一批 水果 ． 上午 卖出 总数 的 30% ， 下午 卖出 总数 的 50% ， 全天 共 卖出 240 千克 ． 这 批 水果 共有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3014", "content": "一 段 布 ， 用 去 它 的 (3/4) ， 就 剩下 15 米 ； 若 用 去 它 的 (3/5) ， 则 用 去 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6212", "content": "一 件 衣服 打 0.8 后 价钱 是 80 元 ， 这件 衣服 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13777", "content": "一 辆 自行车 的 车轮 直径 是 0.5 米 ， 如果 这辆 自行车 的 车轮 每分钟 转 200 圈 ， 它 4 分钟 通过 一座 大桥 ， 这 座 大桥 长 多少 米 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "7838", "content": "某地 去年 使用 宽带网 的 家庭 有 2400 户 ， 今年 使用 宽带网 的 家庭 比 去年 增加 了 (1/3) ． 今年 使用 宽带网 的 有 多少 户 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2340", "content": "一 项 工程 ， 甲队 独 做 4 天 完成 (1/5) ， 乙 队 独 做 3 天 完成 (1/10) ， 现在 甲队 先 做 5 天 ， 余下 的 由 甲乙 两队 合 做 ， 还 需 几天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "113", "content": "学校 组织 植树 活动 ， 四年级 有 136 人 参加 ， 五年级 参加 的 人数 比 四年级 的 2 倍 少 16 人 ． 五年级 有 多少 人 参加 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22626", "content": "一 堆 沙子 重 240 吨 ， 一堆 石子 质量 的 (2/3) 与 这 堆 沙子 质量 的 60% 相等 ． 这 堆 石子 重 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12981", "content": "比 3.96 多 1.07 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21151", "content": "你 有 3 件 上衣 ， 4 条 裤子 ， 那么 当 你 出门时 ， 有 多少 种 不同 的 衣服 搭配 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7850", "content": "一 个 工程队 修 一条 长 1600 米 的 公路 ， 已经 修好 这 条 路 的 75% ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6496", "content": "一 根 绳子 用 去 (7/8) m ， 比 剩下 的 少 (3/4) m ， 这根 绳子 一共 长 多少 m ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20899", "content": "从 甲 到 乙 ， 货车 要 行 8 个 小时 ， 客车 要 行 6 个 小时 ． 两车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 相遇 时 货车 比 客车 少 行 24 千米 ． 那么 甲 、 乙 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "18178", "content": "六年级 参加 数学 小组 的 有 36 人 ， 语文 小组 的 人数 是 数学 小组 的 (5/6) ， 体育 小组 人数 是 语文 小组 的 (4/3) ． 体育 小组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "378", "content": "水果店 购回 香蕉 150 千克 ， 购回 苹果 比 香蕉 的 3 倍 还 多 50 千克 ， 购回 香蕉 、 苹果 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14567", "content": "少先队员 植树造林 ， 三年级 种树 64 棵 ， 四年级 种 的 棵 数 是 三年级 的 2 倍 ， 五年级 种 的 棵 数 比 3 、 四年级 的 总和 还 少 42 棵 ． 五年级 种树 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17210", "content": "一 袋 面粉 ， 吃 了 15 千克 ， 正好 是 剩下 的 (3/4) ， 这 袋 面粉 一共 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16766", "content": "小强 的 身高 是 1.52 米 ， 爸爸 的 身高 是 小强 的 1.25 倍 ， 爸爸 的 身高 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19328", "content": "甲 数 比 乙 数 少 37.5% ， 乙 数 比 甲 数多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "207", "content": "玫瑰花 每 只 1.8 元 ， 百合花 每 只 2.5 元 ． 小巧 买 了 5 只 玫瑰花 和 3 只 百合花 ， 一 共用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16355", "content": "甲乙 两城 相距 1230 千米 ． 两辆 汽车 同时 从 两城 相对 开出 ， 甲 城 开出 的 汽车 每 小时 行 49.8 千米 ， 乙 城 开出 的 汽车 每 小时 行 52.7 千米 ． 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7390", "content": "a 、 b 两地 相距 1160 千米 ， 甲 火车 从 a 地 开往 b 地 ， 2 小时 后 ， 乙 火车 从 b 地 开往 a 地 ， 已知 ： 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 70 千米 ， 乙 车 开出 几小时 后 与 甲 车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17181", "content": "王 叔叔 3 分钟 打字 270 个 ， 照 这样 的 速度 ， 一份 稿件 有 6300 个 字 ， 需要 打 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18213", "content": "同学 们 排练 体操 ， 每行 站 30 人 ， 正好 排 16 行 ， 如果 排 24 行 ， 每排 站 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20148", "content": "一 个 长方体 ， 高 减少 一些 后 ， 体积 就 减少 20 立方厘米 ， 剩下 的 是 棱 长 5 厘米 的 正方体 ， 高 减少 了 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4476", "content": "一 条 裤子 的 价格 是 18 元 ， 一件 上衣 的 价格 是 一条 裤子 的 2 倍 ， 买 一套 这样 的 衣服 共用 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17480", "content": "有 10 吨 煤 ， 第一次 用 去 10% ， 第 二 次 用 去 (1/10) 吨 ， 还 剩下 多少 吨 煤 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6624", "content": "卫生 大扫除 中 ， 明明 负责 擦 一个 窗户 上 的 玻璃 ， 他 已经 擦 了 (2/6) ． 请问 ： 他 还要 擦 几分 之 几 才能 全部 擦 完 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10011", "content": "宁城 小学 教学楼 占地面积 是 640 平方米 ， 大约 是 校园 总面积 的 (4/45) ． 求 宁城 小学 校园 的 总面积 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15971", "content": "一 个 编 筐 专业户 28 天 编 了 242 个 筐 ， 比 原 计划 多 编 了 18 个 筐 ， 原 计划 每天 编 多少 个 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2579", "content": "北京故宫 要 重新 油漆 12 根 大 圆柱 ， 圆柱 底面 周长 为 3.14 米 ， 高 6.5 米 ， 按 1 千克 油漆 可 漆 5 平方米 计算 ， 漆 这些 大 圆柱 要 多少 千克 油漆 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16476", "content": "学校 组织 秋游 ， 准备 了 4 辆 汽车 ， 学生 去 了 82 人 ， 老师 去 了 6 人 ， 平均 每辆车 坐 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2877", "content": "家具 运 来 35 把 木椅 ， 运 来 的 折椅 比 木椅 的 3 倍 还 多 10 把 ， 家具店 共运 来 多少 把 椅子 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3985", "content": "一 个数 除以 8 ， 商 是 56 ， 余数 是 7 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3667", "content": "图书馆 有 文艺 书 和 故事书 共 960 本 ， 其中 文艺 书 的 本 数 是 故事书 的 3 倍 ， 买来 故事书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9440", "content": "一 杯 盐水 ， 盐 和 水 的 质量 比 是 1 ： 5 ， 其中 水 有 100 克 ， 那么 这 杯 盐水 质量 有 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21251", "content": "两辆 汽车 分别 同时 从 甲 、 乙 两地 相对 开出 ， 甲 车 每 小时 行 50 千米 ， 乙 车 每 小时 行 60 千米 ， 经过 4 小时 两车 共 行 了 全程 的 80% ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11824", "content": "六年级 参加 军乐队 的 人数 是 没 参加 的 20% ， 没 参加 的 比 参加 的 多 32 人 ， 参加 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21930", "content": "一 项 工作 ， 第一天 甲 、 乙 两 人 合 做 4 小时 ， 完成 全部 工作 的 (2/5) ； 第 二 天 乙 又 独 做 了 7 小时 ， 还 剩 全部 工作 的 没 完成 (11/30) ． 这件 工作 由 甲 一 人 独 做 需要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1158", "content": "(9/10) 米 的 铁条 ， 用 去 它 的 (1/2) 后 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22341", "content": "一 个 比例 中 ， 两个 外 项 正好 互为 倒数 ， 已知 一个 内 项 是 (3/8) ， 那么 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14696", "content": "布袋 里 有 9 个 红色 小球 ， 6 个 白色 小球 ， 7 个 蓝色 小球 ， 小 玲 闭 着 眼睛 从 布袋 里 取 小球 ， 至少 取出 多少 个 小球 ， 才能 保证 取得 每 一种 颜色 的 小球 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7673", "content": "小 货车 的 载重量 是 5.4 吨 ， 大 货车 载重量 是 小 货车 的 3 倍 ， 大 货车 载重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "130", "content": "一 把 椅子 90 元 ， 买 1 张 办公桌 的 钱 可以 买 3 把 椅子 ． 买 一套 办公 桌椅 （ 一张 桌子 和 一把 椅子 ） 需要 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1423", "content": "一 种 电视机 原价 是 5800 元 ， 第一次 降价 280 元 ， 第 二 次 降价 120 元 ， 这种 电视机 现价 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16759", "content": "（ 2 * 4 * 8 * 16 ） * （ 25 * 6.25 * 1.25 ） = ．", "knowledge": ["*"], "difficulty": 0.5, "length": 13}
-{"question_id": "11574", "content": "一 个 小数 扩大 3 倍 后 得到 的 数 比 原 数 大 8.6 ， 原 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2744", "content": "把 一根 木料 锯 3 段 要 3.6 分钟 ， 锯 9 段 要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21514", "content": "4 * (3/11) / (3/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16857", "content": "一 种 小汽车 的 速度 可以 达到 180 千米 ， 比 一种 飞机 慢 (5/8) ， 这种 飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20705", "content": "修 一条 公路 ， 前 6 天 每天 修 46 米 ， 后 8 天 共 修 424 米 ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4745", "content": "挖 一个 长 120 米 、 宽 32 米 、 深 4 米 的 大 水塘 ， 用 每 小时 挖土 60 立方米 挖土机 来 挖 ， 需 多少 小时 可 挖 完 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14553", "content": "把 一根 (9/10) 米 的 木料 锯 成 长度 相等 的 几段 ， 一共 锯 了 2 次 ， 平均 每 段长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15471", "content": "两个 因数 的 积 是 1.53 ， 如果 一个 因数 扩大 100 倍 ， 另 一个 因数 不变 ， 那么 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2926", "content": "红星 小学 5 年 2 班 有 男生 25 人 ， 比 女生 多 3 人 ， 全班 共有 学生 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18837", "content": "清整 校园 运 脏土 ， 四年级 共运 60 筐 ， 相当于 五年级 运土 的 (4/5) ， 五年级 运土 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8953", "content": "甲乙 两 人 同时 从 a 地 到 b 地 ， 甲 每分钟 走 60 米 ， 乙 每分钟 走 50 米 ， 经过 3 分钟 后 ， 两 人 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9617", "content": "甲乙 两 汽车 从 相距 600 千米 的 两 城市 相对 开出 ， 甲 汽车 每 小时 行 65 千米 ， 乙 汽车 每 小时 行 55 千米 ， 两车 开出 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22491", "content": "将 1 升 装 的 苹果汁 倒入 (7/10) 升 的 瓶 中 ． 还 会 留下 多少 升 苹果汁 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7879", "content": "施工队 修 一条 2400 米 长 的 公路 ， 第一个 月 修 了 全长 的 (1/4) ， 第 二 个 月 修 了 全长 的 30% ． 两个 月 一共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9192", "content": "苹果 每千克 4.19 元 ， 鸭梨 每千克 5.21 元 ， 妈妈 各 买 了 3.8 千克 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2329", "content": "图书馆 有 565 本 科技 书 ， 童话 书 比 科技 书 少 65 本 ， 小说书 比 童话 书 少 35 本 ， 图书馆 有 小说书 多少 本 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1519", "content": "72 + 34 * 5 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19470", "content": "甲 、 乙 两 船 分别 从 a 、 b 两地 相对 开出 ， 甲 船 行 了 全程 的 (4/5) ， 乙 船 行 了 全程 的 (3/4) ， 这时 两 船 相距 99 千米 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20921", "content": "两个 因数 的 积 与 其中 一个 因数 相除 的 商 是 2.4 ， 与 另 一个 因数 相除 的 商 是 4.5 ， 这 两个 因数 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4988", "content": "一 个数 加上 它 的 40% 正好 等于 14 的 50% ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21920", "content": "南山 希望 小学 计划 投资 160 万元 建 一座 教学楼 ， 实际 投资 131.2 万元 ， 节约 投资 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3899", "content": "有 一种 药水 ， 药粉 与 水 的 比 是 1 ： 8 ， 药水 重 450 克 ， 药水 中 水 重 多少 克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10721", "content": "同学 们 为 国庆 做 彩旗 ， 男生 做 了 85 面 ， 女生 做 的 彩旗 比 男生 的 6 倍 多 20 面 ， 女生 做 了 多少 面 彩旗 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12877", "content": "一 个 比 的 后 项 是 (7/6) ， 比值 是 2 ， 它 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10613", "content": "张 叔叔 去年 年薪 18 万元 ， 缴纳 个人所得税 10% ， 给 儿子 教育 投资 15% ， 张 叔叔 还 剩 多少 万元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13582", "content": "学校 组织 手工 制作 大赛 ， 共有 12 位 辅导 老师 ， 每 8 名 同学 分为 一组 ， 每组 11 件 作品 ． 全校 有 1664 名 同学 参赛 ， 全校 的 学生 一共 做 了 多少 件 作品 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10354", "content": "李师傅 现在 做 一个 零件 只要 12 分钟 ， 比 原来 节约 了 75% ． 原来 做 一个 零件 要 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13322", "content": "学校 体育 室 有 篮球 45 个 ， 乒乓球 的 只 数 是 篮球 的 3 倍 ， 篮球 和 乒乓球 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3424", "content": "甲 在 乙 的 后面 16 千米 处 ， 两 人 同时 同 向 而 行 ， 甲 每 小时 行 18 千米 ， 乙 每 小时 行 10 千米 ， 多少 小时 甲 追 上 乙 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9501", "content": "有 一堆 糖果 ， 其中 奶糖 占 (9/20) ， 再 放入 16 块 水果糖 后 ， 奶糖 就 只 占 (1/4) ， 那么 这 堆 糖果 中 有 奶糖 多少 块 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "979", "content": "五年级 有 180 名 学生 ， 每人 至少 参加 一 项 课外活动 ， 其中 (2/3) 的 人 参加 了 科技 活动 ， (1/2) 的 人 参加 了 外语 小组 ， 这两项 活动 参加 的 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8698", "content": "养殖场 有 鸡 360 只 ， 鹅 的 只 数 是 鸡 的 (5/6) ， 又 是 鸭 的 (3/4) ， 鸭 有 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20696", "content": "一 种 图书 原价 每 本 28 元 ， 打 0.8 后 ， 这种 图书 每 本 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17854", "content": "一 件 儿童 上衣 50 元 ， 一条 长裤 比 上衣 便宜 8 元 ． 这 套 衣服 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20417", "content": "小 明 参加 班委 竞选 ， 已知 全班 共 40 人 ， 有 6 人 投 了 反对票 ， 2 人 投 了 弃权票 ， 其余 的 学生 都 投 了 赞成票 ， 那么 小 明 的 得票率 是 ： 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12628", "content": "一 袋 大米 第 二 天 吃 了 1400 克 ， 比 第一天 的 (4/5) 多 200 克 ， 第一天 吃 了 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5797", "content": "建筑工地 运 来 两车 水泥 ， 每 车 30 袋 ， 每 袋 50 千克 ， 共运 来 水泥 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20154", "content": "客车 每 小时 行 41 千米 ， 货车 每 小时 行 37 千米 ， 两车 同时 从 相距 624 千米 的 两个 车站 相对 开出 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18650", "content": "一 个 果园 ， 去年 共 收 苹果 100 吨 ， 今年 产量比 去年 多 20% ， 今年 共 收 苹果 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "726", "content": "东关 菜市场 运进 每 筐 质量 相等 的 西红柿 ， 上午 运进 120 筐 ， 下午 运进 150 筐 ， 上午 比 下午 少运 900 千克 ． 全天 共 运进 西红柿 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18058", "content": "淘气 这 几天 在 看 一本 课外书 280 页 ， 第一天 看 了 这 本书 的 (3/7) ， 第 二 天 看 的 页数 是 第一天 的 (2/3) ； 这 两天 淘气 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "19532", "content": "37 + 1008 + 963 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4719", "content": "一 酒店 “ 5 一 ” 黄金周 营业额 为 4.8 万元 ， 按规定 向 国家 缴纳 营业税 后账 上 还有 4.56 万元 ， 营业税 的 税率 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15039", "content": "2004 年 雅典 夏季 奥运会 ， 中国 代表团 共 派出 407 名 运动员 参赛 ， 2008 年 北京 夏季 奥运会 ， 中国 代表团 共 派出 639 名 运动员 参赛 ， 中国 代表团 在 北京 奥运会 比 雅典 奥运会 多派 多少 名 运动员 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1068", "content": "一 个数 的 30% 是 150 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17423", "content": "王老师 2006 年 3 月 的 工资 是 1800 元 ． 按照 规定 ， 每月 的 个人收入 超过 1600 元 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 王老师 这个 月 应 缴纳 税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15648", "content": "饲养场 养鸡 1400 只 ， 养 的 鸡 只 数 比 鸭 多 (3/7) ， 这个 饲养场 养鸭 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8103", "content": "一 台 织袜机 3 小时 织袜 39 双 ， 照 这样 计算 ， 这 台 织袜机 一天 工作 8 小时 ， 可以 织袜 多少 双 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3892", "content": "(1/2) + (2/4) + (1/3) + (6/9) + (1/4) + (9/12) = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "11375", "content": "新星 小学 参加 计算机 班 的 人数 是 美术班 的 (2/3) ， 美术班 人数 是 合唱队 的 (2/5) ， 已知 参加 计算机 班 的 有 20 人 ， 参加 合唱队 的 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9276", "content": "李老师 昨天 批改 了 13 篇 作文 ， 今天 批改 的 篇数 是 昨天 的 2 倍 ， 结果 还 剩 11 本 没 批改 ． 那么 李老师 所 教 的 这个 班 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18222", "content": "把 3 米 长 的 绳子 均 分成 7 份 ， 每份 就 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14145", "content": "一 种 商品 ， 进货价 400 元 ， 售价 500 元 ． 这种 商品 所 获得 的 利润 占 成本 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14852", "content": "四年级 186 人 去 红领巾 影院 看 电影 ， 全部 入座 后 还有 5 排空 座位 ， 每排 48 个 座位 ， 这个 红领巾 影院 一共 可以 坐 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15478", "content": "仓库 里 有 36 吨 钢材 ， 第一次 用 去 10% ， 第 二 次 用 去 (1/2) 吨 ． 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10326", "content": "一 根 钢筋 长 12 米 ， 每 (1/6) 米 截 成 一段 ， 可以 截 成 多少 段 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15827", "content": "某 工厂 有 一堆 煤 ， 已经 烧 了 16 天 ， 以后 每天 少 烧 0.1 吨 ， 剩下 的 19.8 吨 可以 烧 18 天 ． 这 一堆 煤 共有 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6289", "content": "水果店 运 来 45 箱 梨 和 52 箱 苹果 ， 平均 每箱 梨 重 18 千克 ， 平均 每箱 苹果 重 20 千克 ． 水果店 共运 来 多少 千克 水果 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14559", "content": "甲 仓 有 棉花 4200 包 ， 运出 (2/7) 给 乙 仓 后 ， 两 仓库 棉花包 数 相等 ， 原来 甲 仓 比 乙 仓 多 多少 包 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "21668", "content": "一 条 绳子 长 48 米 ， 剪 去 全长 的 75% ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16548", "content": "一 件 商品 降价 20% 后 的 价格 是 120 元 ， 这件 商品 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20512", "content": "一 根 电线 长 20 米 ， 先 用 去 它 的 (1/4) ， 又 用 去 了 (3/4) 米 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19397", "content": "大 猴 有 9 只 ， 小 猴 的 只 数 是 大 猴 的 3 倍 ． 小 猴 有 多少 只 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "988", "content": "两辆 汽车 从 a 地 开往 b 地 ， 甲 车 每 小时 行 64 千米 ， 乙 车 每 小时 行 80 千米 ， 甲 车 开出 1.5 小时候 ， 乙 车 才 开出 ， 结果 两车 同时 到达 b 地 ， 这时 乙 车行 了 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16508", "content": "8 连续 加 7 次 ， 再 加上 283 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4787", "content": "把 2400 双 袜子 进行 包装 ， 12 双 装 成 一盒 ， 40 盒装 成 一箱 ， 这些 袜子 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4489", "content": "某 商品 打 0.8 出售 现价 100 元 ， 原价 为 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16842", "content": "工程队 修 一条 长 2000 米 的 路 ， 每天 修 118 米 ， 修 了 5 天 后 ， 再 修 多少 米 就 修 完 了 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20597", "content": "养鱼场 去年 放养 鱼苗 896 尾 ， 今年 放养 的 鱼苗 数 比 去年 的 2 倍 少 329 尾 ． 今年 放养 多少 尾 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9590", "content": "张 明 读 一本 科技 书 ， 第一天 读 了 这 本书 的 16% ， 第 二 天 又 读 了 全书 的 (1/5) ， 比 第一天 多 读 6 页 ， 这 本书 一共 = 多少 页 ？ （ 列 综合 算式 解 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12143", "content": "乡 中心小学 今年 新购 40 张 课桌 ， 花 4400 元 ； 后来 又 买 了 60 把 椅子 ， 花 了 2700 元 ． 照 这样 计算 ， 一套 桌椅 的 价格 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6913", "content": "王 大伯 家 收 了 (5/8) 吨 白菜 ， 收 的 萝卜 比 白菜 少 (1/5) ． 王 大伯 家 收 的 萝卜 比 白菜 少 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12118", "content": "学校 有 72 个 篮球 ， 乒乓球 比 篮球 多 28 个 ， 足球 比 篮球 和 乒乓球 的 总数 少 32 个 ， 足球 有 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2499", "content": "一 枝 钢笔 18 元 ， 一枝 毛笔 的 价钱 是 钢笔 的 (1/3) ． 一枝 毛笔 的 价钱 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4641", "content": "一 筐 水果 卖 了 (4/7) 后 ， 还 剩 这 筐 水果 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15370", "content": "有 一批 同学 参加 游泳 、 跑步 比赛 ， 其中 参加 游泳 的 同学 42 人 ， 参加 跑步 的 有 38 个 同学 ， 两项 都 参加 的 有 18 人 ． 共有 多少 名 同学 参加 了 比赛 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13547", "content": "一 个数 减去 8 ， 加上 4 ， 再 乘 5 的 结果 是 25 ， 这个 数 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16325", "content": "今年 小 明 家 储蓄 了 5145 元 ， 比 去年 多 25% ． 去年 小 明 家 储蓄 了 有 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7543", "content": "商店 运 来 鸡蛋 和 鸭蛋 各 7 箱 ． 鸡蛋 每箱 重 26 千克 ， 鸭蛋 每箱 重 31 千克 ， 商店 一共 运 来 的 鸡蛋 和 鸭蛋 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7663", "content": "水 结成 冰 后 体积 增加 10% ， 现有 一块 冰 的 体积 是 11 立方厘米 ， 融化 成 水 后 体积 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10129", "content": "(1/3) + (1/15) + (1/35) + (1/63) + (1/99) + (1/143) = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "2667", "content": "把 4 米 长 的 绳子 平均 分成 7 段 ， 每 段长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7734", "content": "小 华 练习 投篮 60 次 ， 命中率 是 60% ， 他 有 多少 次 没 投中 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11040", "content": "阳光 超市 一种 电磁炉 的 售价 是 320 元 ， 比 原价 便宜 80 元 ， 电磁炉 的 价格 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16729", "content": "商店 有 14 箱 鸭蛋 ， 卖出去 250 千克 后 ， 还 剩 4 箱 零 20 千克 ， 每箱 鸭蛋 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7256", "content": "学校 各年级 共 植树 240 棵 ， 高年级 植 了 其中 的 (2/3) ， 五年级 植树 的 棵 数 是 高年级 的 (1/2) ． 五年级 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5628", "content": "甲乙 两个 工程队 维修 一条 公路 ， 甲队 维修 了 (11/24) 千米 ， 比 乙 队 少 维修 (5/12) 千米 ， 甲乙 两队 共 维修 了 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8143", "content": "小 明 爸爸 的 月工资 是 2100 元 ， 按照 个人所得税 的 有关 规定 ， 超过 2000 元 部分 要 缴纳 的 个人所得税 5% ， 那么 小 明 爸爸 月工资 应 缴纳 所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10811", "content": "某 工程队 ， 16 个 工人 9 天 能 挖水沟 1872 米 ， 27 个 工人 14 天 能 挖 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "761", "content": "修路 队 修 一条 公路 ， 原 计划 每天 修 60 米 ， 28 天 可以 修 完 ． 实际 每天 修 84 米 ， 实际 只用 几天 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18489", "content": "一 个 平行四边形 的 面积 是 45 cm ^ 2 ， 与 它 等 底 等 高 的 三角形 面积 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7975", "content": "小 明 妈妈 在 水果 店里 买 了 2.5 千克 香蕉 ， 她 付给 营业员 10 元 钱 ， 找回 2.10 元 钱 ， 每千克 香蕉 多少 元 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21863", "content": "多少 / 41 = 33 … 2 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20979", "content": "在 一条 长 1000 米 的 小河 一边 绿化 植树 （ 两端 都 种 ） ， 每隔 20 米 种 一棵 柳树 ， 一共 需要 多少 棵 柳树 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1352", "content": "工程队 安装 一条 水管 ， 原 计划 每天 安装 40 米 ， 6 天 就 能 完成 ． 实际 比 计划 提前 1 天 就 完成 了 任务 ， 实际 每天 安装 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9819", "content": "食堂 运 来 大米 250 千克 ， 是 运 来 面粉 的 (5/3) ， 运 来 的 蔬菜 是 面粉 的 (3/10) ， 运 来 蔬菜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4838", "content": "某 中学 的 科技 报告厅 楼上 有 20 排 ， 楼下 有 30 排 ， 每排 都 有 32 个 座位 ， 这个 报告厅 能 坐 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8663", "content": "商场 有 一种 衣服 售价 34 元 ， 比 原来 定价 便宜 15% ， 现价 比 原来 定价 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18925", "content": "亚洲 的 总人口 是 38.23 亿 ， 欧洲 的 总人口 是 7.26 亿 ， 美洲 总人口 是 8.69 亿 ， 亚洲 的 人口 比 欧美 两 洲 人口总数 还 多 多少 亿 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11668", "content": "在 一次 爱心 捐款 活动 中 ， 四年级 捐款 140 元 ， 六年级 捐款 210 元 ， 五年级 捐款 是 4 、 六年级 总数 的 (3/7) ， 五年级 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19272", "content": "甲乙 两车 经过 5 小时 相遇 ， 甲 车 每 小时 的 速度 是 85 千米 ， 乙 车 的 速度 是 甲 车 的 120% ， 问 a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9330", "content": "李师傅 要 生产 400 个 零件 ， 已经 生产 了 75% ， 还要 生产 多少 个 零件 才能 完成 任务 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18495", "content": "一 辆 汽车 从 南京 开往 上海 ， 已经 行 了 全程 的 (3/5) ， 这时 汽车 距 上海 120 千米 ． 南京 到 上海 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16213", "content": "挖 一个 菜 窑 ， 长 6 米 ， 宽 3.5 米 ， 要 使 这个 菜 窑 的 容积 为 42 立方米 ， 应 挖 多 深 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22891", "content": "甲 每分钟 走 75 米 ， 乙 每分钟 走 80 米 ， 丙 每分钟 走 100 米 ， 甲 、 乙 从 东 镇 ， 丙 人 西 镇 ， 同时 相向 出发 ， 丙 遇到 乙 后 3 分钟 再 遇到 甲 ． 求 两 镇 之间 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22589", "content": "一 种 玩具 现 售价 100 元 ， 原来 售价 比 现在 贵 25% ． 这种 玩具 比 原来 便宜 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9378", "content": "一 个 水箱 中 的 水 是 装满 时 的 (5/6) ， 用 去 200 升 以后 ， 剩余 的 水 是 装满 时 的 (3/4) ， 这个 水箱 的 容积 = 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2970", "content": "0.8 与 (3/5) 的 和 除 这 两个 数 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8054", "content": "甲 是 乙 的 (2/3) ， 同时 又 是 丙 的 (4/5) ， 丙 是 60 ， 乙 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5207", "content": "一 种 服装 原价 120 元 ， 现在 降价 (3/8) ， 现在 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1028", "content": "学校 体育组 买来 5 盒 羽毛球 ， 每盒 6 只 ， 共用 去 人民币 60 元 ， 每 只 羽毛球 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11390", "content": "甲 、 乙 两 人 分别 从 相距 200 米 的 a 、 b 两地 同时 出发 相向 而 行 ． 甲 每分钟 走 50 米 ， 乙 每分钟 走 40 米 ， 出发 6 分钟 后 两 人 相距 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "19010", "content": "一 条 公路 长 300 千米 ， 一个 修路 队 修 了 20 天 ， 还 剩 80 千米 没 修 完 ， 这个 修路 队 平均 每天 修路 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3151", "content": "在 一次 数学 测验 中 ， 包括 小 明 在内 的 6 名 同学 的 平均 分为 70 分 ， 其中 小 明 得 了 96 分 ， 则 小 明 以外 的 另 5 位 同学 的 平均 分为 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21820", "content": "计算 610 - （ 22 + 18 ） * 13 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 最后 算 多少 法 ， 结果 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14565", "content": "10 只 兔子 排队 做操 ， 每 两只 兔子 隔 2 米 ， 兔子 队伍 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "231", "content": "动物园 里 有 5 只 狮子 ， 体重 一共 是 900 千克 ， 平均 每 只 狮子 的 体重 恰好 是 一只 小羊 的 9 倍 ． 这 只 小羊 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16455", "content": "师傅 每 小时 加工 50 个 零件 ， 徒弟 8 小时 加工 288 个 零件 ． 徒弟 平均 每 时 比 师傅 少 加工 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12681", "content": "已知 爸爸 身高 180 厘米 ； 小 明说 ： “ 我 的 身高 是 爸爸 的 (7/9) ． ” 妈妈 说 ： “ 我 的 身高 是 小 明 的 (8/7) ； ” 妈妈 的 身高 = 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20488", "content": "学校 图书室 有 故事书 360 本 ， 比 科技 书 少 (1/4) ， 科技 书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12784", "content": "甲乙 两队 合 修 一条 公路 ， 甲队 平均 每天 修 235 米 ， 乙 队 平均 每天 比 甲队 少 修 48 米 ， 他们 共同 修 了 8 天 完成 了 任务 ， 这 条 公路 有 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20605", "content": "小 明 家 准备 买 一辆 节能 环保 新型 小汽车 ， 据 专家 介绍 分期付款 购买 要 多 加价 9% ， 如果 一次性 付款 购买 可以 按 0.95 优惠 ， 小 红 爸爸 算了算 发现 分期付款 比 一次性 付款 多付 14000 元 ， 请 你 帮忙 算 一 算 这种 汽车 售价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8913", "content": "一 本 59 页 的 书 ， 平均 每天 看 9 页 ， 多少 天 可以 看 完 ． （ 填 带分数 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14542", "content": "小 红 在 书店 买 了 两本 打 0.8 出售 的 书 ， 共 花 了 12 元 ， 小 红 买 这 两本书 便宜 了 多少 钱 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "131", "content": "工人 叔叔 在 公路 的 一侧 从头到尾 每隔 80 米 立 一根 电线杆 ， 刚好 立 了 9 根 ． 你 知道 这 段 公路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22637", "content": "小 华 将 4000 元 存入 银行 ， 定期 2 年 ， 如果 按 年利率 为 2.79% 计算 的话 ， 到期 后 应得 利息 和 本金 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "23082", "content": "小 辉 家 有 3 口 人 ， 住房面积 是 72.6 平方米 ， 他家 人均 住房面积 = 多少 平方米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18389", "content": "某 超市 为 鞋厂 代销 200 双 运动鞋 ， 代销 费 为 销售总额 的 8% ． 全部 销售 完 后 ， 超市 向 鞋厂 付 8280 元 ， 这 批 运动鞋 每 双 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20357", "content": "13 / 27 = 多少 （ 用 分数 表示 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3585", "content": "列式 计算 ： 一个 数 的 25% 比 它 的 (1/3) 少 1.2 ． 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21377", "content": "一 列 火车 要 通过 1800 米 长 的 大桥 ． 已知 从 货车 头上 桥 到 车尾 离开 桥 共用 112 秒 ， 货车 完全 在 桥 上 的 时间 为 80 秒 ， 这 列 货车 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13391", "content": "果园 里 有 桃树 396 棵 ， 比 梨树 少 108 棵 ， 桃树 和 梨树 一共 有 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18648", "content": "把 8 ： 15 的 前项 增加 16 ， 要 使 比值 不变 ， 后 项 应 增加 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20345", "content": "小 军 采集 了 15 个 昆虫 标本 ， 其中 7 个 是 蝴蝶 标本 ． 蝴蝶 标本 的 个数 是 昆虫 标本 总数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7266", "content": "美术学院 有 一个 3 层 的 展览馆 ， 每层 有 4 个 展览厅 ， 在 这些 展厅 里 一共 放 了 360 幅 画 ， 平均 每个 展厅 放 几幅 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18789", "content": "读 一本 200 页 的 故事书 ， 已经 读 了 15 天 ， 剩下 20 页 没 看 ， 平均 每天 读 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2493", "content": "4 千克 鸭蛋 可以 换 5 千克 鸡蛋 ， 照 这样 计算 ， 8 千克 鸡蛋 可以 换回 多少 千克 的 鸭蛋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8850", "content": "小巧 妈妈 带 了 58 元 ， 买 了 每千克 2.8 元 的 梨 ． 找回 的 钱 正好 买 6 个 单价 为 6.4 元 的 小 碗 ． 妈妈 买 了 多少 千克 的 梨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12564", "content": "客船 和 货船 分别 从 甲 、 乙 两 港 同时 出发 相对 开出 ， 客船 从 甲 港 开往 乙 港 ， 每 小时 行 30 千米 ； 货船 从 乙 港 开往 甲 港 ， 每 小时 行 全程 的 (1/8) ． 当 客船 距 甲 港 150 千米 时 ， 货船 正好 距 乙 港 120 千米 ． 甲 、 乙 两 港 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19772", "content": "某 厂 扩建 厂房 ， 计划 投资 500 万元 ， 实际 投资 560 万元 ， 投资 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12378", "content": "一 件 上衣 原价 180 元 ， 现在 降价 (1/6) ， 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20680", "content": "一 块 菜地 ， 其中 的 (1/16) 种 菠菜 ， (3/16) 种 油菜 ， (5/16) 种 白菜 ， 剩下 的 种 青菜 ， 青菜 和 菠菜 种植 的 面积 共 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12019", "content": "一 个 平行四边形 ， 相邻 的 两条 边 分别 长 4 厘米 和 6 厘米 ， 测 得 其中 一条 边上 的 高 长 5 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16282", "content": "一 本 连环画 封面 的 宽 是 (2/10) 米 ， 长 比 宽 多 (1/10) 米 ， 这本 连环画 封面 的 长 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17168", "content": "果园 里 栽 了 98 棵 桃树 ， 还 栽 了 7 行 杏树 ， 桃树 和 杏树 一共 有 182 棵 ， 平均 每行 杏树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4445", "content": "甲 、 乙 两 数 的 比 是 4 ： 5 ， 甲 数 是 两 数 和 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17996", "content": "果园 里 有 桃树 300 棵 ， 梨树 的 棵 数 比 桃树 少 20% ， 梨树 一共 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "417", "content": "一 个 熊猫 玩具 原价 是 56 元 ， 现价 比 原价 降低 了 (1/7) ， 现在 熊猫 玩具 的 价钱 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12860", "content": "小 明 这个 月 用 150 元 钱 ， 比 上个月 多用 (1/5) ， 他 上个月 用 多少 元 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18435", "content": "学校 买来 新书 240 本 ， 其中 (1/2) 是 故事书 ， (1/4) 是 文艺 书 ， 其余 是 连环画 ． 连环画 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13282", "content": "李老师 买 了 2 副 羽毛球拍 ， 付出 70 元 ， 找回 6 元 ． 每 副 羽毛球拍 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7144", "content": "学校 小星星 合唱团 中 ， 男生 人数 是 女生 的 (9/11) ， 后来 又 新增 了 8 名 男生 ， 这时 男女生 人数 刚好 相等 ． 这个 合唱团 有 多少 名 女生 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6294", "content": "一 根 绳子 ， 如果 剪 5 段 ， 则 差 2 米 ； 如果 剪 3 段 ， 则 余下 8 米 ． 绳子 长 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12467", "content": "一 根 绳子 长 2 米 ， 第一次 剪 去 95 厘米 ， 是 第 二 次 剪 去 的 5 倍 ， 这根 绳子 剪 了 两次 后 短 了 多少 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14073", "content": "电影院 分 上 下层 ， 楼下 有 38 排 ， 每排 有 32 个 座位 ； 楼上 有 15 排 ， 每排 有 28 个 座位 ． 这个 电影院 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9504", "content": "从 甲地 到 乙地 汽车 第一天 行 了 全程 的 25% ， 第 二 天 行 了 剩下 的 40% ， 这时 离 乙地 还有 135 千米 ， 两地 间 的 距离 = 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10251", "content": "一 个数 的 (1/6) 是 8 的 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9561", "content": "某种 药水 是 按 1 ： 500 配制 而 成 的 ， 现有 10 千克 药粉 ， 可 配制 多少 千克 的 药水 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20031", "content": "青山 村 去年 计划 造林 16 公顷 ， 实际 造林 20 公顷 ， 实际 造林 比 计划 造林 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18805", "content": "华中 建材 商店 原有 白 瓷砖 的 箱 数 比 花 瓷砖 多 1000 箱 ， 白 瓷砖 卖出 (1/3) 后 ， 花 瓷砖 的 箱 数 比 白 瓷砖 多 250 箱 ， 建材 商店 原有 白 瓷砖 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22756", "content": "6 一 儿童节 ， 百货商场 将 童装 按 进价 的 50% 加价 后 ， 写 上 “ 大 酬宾 ， 0.8 优惠 ” 结果 每件 童装 仍 获利 20 元 ， 这 类 童装 每件 进价 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11469", "content": "有 一堆 沙子 ， 运走 了 总数 的 35% 后 ， 还 剩 13 吨 ， 这 堆 沙子 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22170", "content": "学校 植树 ． 三年级 植 了 45 棵 ， 四年级 比 三年级 多 植 15 棵 ， 五年级 植 的 棵 数 等于 四年级 的 2 倍 ． 五年级 比 三年级 多 植 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14257", "content": "邮递 专车 从 邮局 给 科技馆 送 邮件 ， 每 小时 行驶 32 千米 ， 5 小时 到达 ， 今天 有 一 急件 要 4 小时 送达 ， 每 小时 需要 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18919", "content": "三年级 同学 去 参观 展览 ， 一共 4 个 班 ， 每班 5 队 ， 每队 有 12 人 ， 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11233", "content": "甲乙 两个 工程队 的 人数 之 比 为 5 ： 2 ， 从 甲队 跳出 4 人 给 乙 队 ， 此时 甲队 人数 是 乙 队 的 两倍 ， 问 甲队 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "15225", "content": "一 份 稿件 ， 如果 每 小时 打 (2/9) ， 多少 小时 可以 打 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9972", "content": "小 红 看 一 本书 ， 8 天 看 了 192 页 ， 平均 每天 看 的 页数 是 这 本书 的 (1/15) ， 这 本书 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2108", "content": "9 + 9.99 + 9.999 + 9.9999 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14864", "content": "一 种 书 原价 为 20 元 ， 现在 降价 25% ， 现在 买 这 本书 应付 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2066", "content": "冬冬 看 一本 120 页 的 故事书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/4) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3053", "content": "王师傅 从 邮局 给 家中 汇款 500 元 ， 按规定 ， 汇费 是 汇款 数 的 1% ． 王师傅 应付 汇费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5817", "content": "被减数 是 850 ， 减数 是 354 ， 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6331", "content": "两车 从 相距 360 千米 的 两城 同时 相向 而 行 ， 2.5 小时 相遇 ， 甲 车 每 小时 63 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7001", "content": "学校 组织 大家 去 动物园 ， 门票 是 每人 3 元 ， 一共 有 203 人 去 动物园 ． 问 ： 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13287", "content": "王 叔叔 从 家 去 县城 拉 化肥 ， 去 时 每 小时 行 45 千米 ， 用 了 4 小时 ， 回来 时 多用 了 2 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2162", "content": "小 明 去 爬山 ， 他 上山 行 了 629 米 ， 下山 比 上山 少 行 了 158 米 ， 小 明 下山 行 了 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17730", "content": "小 芳 做 语文 作业 用 (3/10) 小时 ， 做 数学 作业 用 (1/5) 小时 ， 做 英语 作业 用 (1/6) 小时 ． 小 芳 做 这 3 种 作业 一 共用 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9736", "content": "果园 收 一批 苹果 ． 用 小筐 装 每 筐 能 装 25 千克 ， 需要 28 个 筐 ， 如果 改用 10 个 大 筐 装 ， 还要 剩下 50 千克 ． 平均 每个 大 筐 装 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19562", "content": "“ 3 ， 8 ” 节 那天 ， 妈妈 路过 一家 服装店 ， 看见 里面 的 商品 一律 打 0.8 出售 ， 妈妈 花 160 元 钱 买 了 一条 裤子 ， 妈妈 节省 了 多少 元 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19255", "content": "一 条 公路 长 1500 米 ， 己 修好 900 米 ， 还 需 修 全长 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2666", "content": "706 与 78 的 积 加上 1680 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14359", "content": "一 只 大象 的 体重 是 696 千克 ， 正好 是 一头 牛 体重 的 12 倍 ． 这 头牛 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4236", "content": "李 帆 骑单车 去 学校 上学 ， 去 时 每 小时 15 千米 ， 返回 时 因 逆风 ， 每 小时 行 10 千米 ， 李 帆 往返 的 平均速度 = 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14589", "content": "在 计算 乘法 时 ， 小胖 错 把 一个 因数 51 看成 15 ， 结果 为 420 ， 原来 正确 得数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11269", "content": "小 玲 家 原来 每天 用电 3.2 度 ， 由于 更新 了 家用电器 ， 现在 每天 节约用电 0.2 度 ． 原来 150 天 用 的 电 ， 现在 可以 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20339", "content": "一 批 化肥 ， 3 天 运走 了 它 的 (1/5) ． 照 这样 的 速度 ， 几天 可以 运 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19998", "content": "甲 、 乙 两列 客车 同时 从 180 千米 的 两地 相对 开出 ， 甲 每 小时 行 50 千米 ， 乙 每 小时 行 40 千米 ， 一只 狗 以 80 千米 的 速度 在 两 人 之间 来回 奔跑 ， 直到 两 人 相遇 狗 行 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4581", "content": "学校 图书馆 买来 600 本书 ， 要 放在 书架上 ， 每个 书架 有 5 层 ， 每层 放 20 本书 ， 一共 需要 多少 个 书架 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6084", "content": "公园 运 来 240 朵花 ， 准备 摆 2 行 ， 每行 放 6 个 花瓶 ． 平均 每个 花瓶 插 多少 朵花 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19286", "content": "一 个数 的 (2/3) 比 8 的 (3/4) 少 3 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7969", "content": "一 把 椅子 52 元 ， 一张 课桌 148 元 ， 学校 买 了 35 套 座椅 ， 买 课桌 比 买 椅子 多 花 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15879", "content": "一 件 衣服 降价 20% 后 售价 是 184 元 ， 这件 衣服 原来 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20398", "content": "服装厂 的 仓库 里 有 一批 面料 ， 如果 都 做 儿童服装 ， 每套 用 2.2 米 ， 刚好 能 做 400 套 ． 如果 都 做成 人 服装 ， 每套 要 用 4.4 米 ， 能 做 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6851", "content": "一 个 装订 小组 平均 每天 装订 285 本书 ， 已经 装订 了 1425 本 ， 余下 的 要 7 天 完成 ， 这 批 书 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21512", "content": "去年 元旦 凤凰山 景区 共 接待 游客 20 万 人 ， 今年 元旦 凤凰山 景区 接待 游客 比 去年 多 了 (1/10) ， 今年 元旦 凤凰山 景区 共 接待 游客 多少 万 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11094", "content": "小 芳 买 了 2.5 千克 香蕉 ， 共用 了 9 元 钱 ， 平均 每千克 香蕉 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9072", "content": "李 爷爷 在 超市 买 了 2.8 千克 豆角 ， 付出 10 元 ， 找回 4.4 元 ， 每千克 豆角 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22836", "content": "李老师 每月 工资 3780 元 ， 按规定 超过 2000 元 的 部分 要 交纳 5% 的 个人收入 调节税 ， 李老师 实际 拿到 手 的 工资 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21702", "content": "明明 家 客厅 地面 的 面积 是 21.6 平方米 ， 如果 每块 地砖 的 面积 是 0.36 平方米 ， 那么 需要 多少 块 这样 的 地砖 才能 将 客厅 的 地面 铺满 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1814", "content": "除数 是 7 ， 商 是 48 ， 余数 是 5 ， 则 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17089", "content": "小 明 向 地震 灾区 捐款 51 元 ， 小林 捐 的 款 比 小 文 少 4 元 ， 而 小 文 捐 的 款 是 小 明 的 (1/3) ， 小林 捐 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8118", "content": "水果店 运 来 650 千克 梨 ， 已经 卖 了 15 箱 ， 平均 每箱 20 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20324", "content": "恋 精灵 服装厂 接到 生产 4800 件 儿童服装 的 任务 ， 前 6 天 生产 了 1920 件 ． 照 这样 的 工作效率 计算 ， 完成 这项 生产 任务 一共 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14240", "content": "明明 和 花花 用 同一个 数 做 除法 ， 明明 用 12 去除 ， 花花 用 15 去除 ． 明明 除 得 商 是 32 余数 是 6 ， 花花 计算 的 结果 应 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1964", "content": "服装厂 原有 职工 360 人 ， 其中 男工 占 (1/5) ， 后来 调 走 一些 男 职工 ， 这时 女职工 占 现有 人数 的 (8/9) ， 调 走 男 职工 多少 人 ﹖", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18629", "content": "苹果 的 售价 是 每千克 4.85 元 ， 买 2.3 千克 要 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15933", "content": "小 亚 在 登山 活动 中 ， 上山 、 下山 共用 了 32 分钟 ， 她 上山 时 每分钟 行 60 米 ， 下山 只用 了 12 分钟 ， 她 下山 时 每分钟 行 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14870", "content": "一 根 绳子 6 m ， 第一次 用 去 (1/2) ， 第 二 次 用 去 (1/4) 还 剩 多少 m ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21617", "content": "一 个 采煤 小队 4.5 小时 采煤 9.36 t ， 照 这样 计算 ， 这个 采煤 队 要 完成 124.8 t 的 采煤 任务 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7279", "content": "一 只 蜗牛 爬 8 米 高 的 墙 ， 白天 向 上爬 4 米 ， 夜晚 下滑 3 米 ， 多少 天 后 蜗牛 爬 到 墙 顶 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18080", "content": "粮店 运 来 大米 (4/5) 吨 ， 运 来 的 面粉 是 大米 的 (3/4) ， 运 来 的 面粉 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20267", "content": "武汉市 居民 生活 用水 的 水价 是 每 立方米 0.70 元 ， 污水处理 费 每 立方米 0.80 元 ， 水资源 费 每 立方米 0.01 元 ． 晓 慧 家 本月 用水 12 立方米 ， 则 本月 应交 水费 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14362", "content": "一 个数 的 6 倍 是 846 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19046", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行驶 32 千米 ， 需要 5 小时 ． 如果 需要 提前 1 小时 到达 ， 每 小时 应 行驶 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16891", "content": "挖 一条 长 1000 米 渠道 ， 前 5 天 挖 了 总长 的 (1/5) ， 按 这样 的 进度 还 需要 几天 挖 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18386", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 (3/8) ， 第 二 小时 行 了 45 千米 ， 还 剩下 全程 的 (2/5) ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1273", "content": "学校 服装厂 进 了 240 米 布 制作 校服 ． 做一套 校服 用布 2.5 米 ， 做 完 后 还 剩 65 米 ． 这 批 校服 共有 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6813", "content": "东海 村 修建 一个 长方体 游泳池 ， 游泳池 长 50 m ， 宽 20 m ， 深 2 m ． 在 游泳池 的 4 周 池壁 和 底面 贴 上 瓷砖 ， 贴 瓷砖 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "16337", "content": "3 个 工人 5 天 加工 零件 1200 个 ． 照 这样 计算 ， 增加 9 个 工人 ， 同样 的 天数 可以 加工 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4215", "content": "一 条 环形 跑道 长 400 米 ， 小 明 每分钟 跑 260 米 ， 小 亮 每分钟 跑 210 米 ， 两 人 同时 同 向 出发 ， 经过 多少 分钟 两 人 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5938", "content": "春华 学校 三年级 要 召开 家长会 ， 已知 本 年级 共有 学生 312 人 ， 每位 学生 只 要求 来 一位 家长 参加 ， 如果 把 所 需要 的 椅子 摆 8 行 （ 一把 椅子 只 坐 一 人 ） ， 那么 每行 大约 需要 摆放 多少 把 椅子 供 家长 坐 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3445", "content": "一 本书 80 页 ， 第一天 看 20% ， 第 二 天 看 30% ， 第 3 天 从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1685", "content": "比 40 千克 多 20% 的 = 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16189", "content": "世界 上 第一台 电子计算机 很大 ， 质量 为 35 吨 ， 比 一头 大象 体重 的 6 倍 还 多 0.2 吨 ． 一头 大象 重 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13930", "content": "修 一条 公路 ， 原 计划 按 8 ： 5 分给 甲 、 乙 两个 工程队 ， 完成 任务 后 ， 甲队 实际 修 了 3200 米 ， 超过 分配任务 的 (1/4) ， 乙 队 实际 完成 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "10559", "content": "一 辆车 从 土 主 开往 泸州 ， 每 小时 行 45 千米 ， 开出 2 小时 后 离 泸州 还有 8 千米 ， 土 主 到 泸州 一共 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13175", "content": "一 件 商品 原价 100 元 ， 先 提价 20% ， 再 按 0.8 出售 ， 现价 = 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9756", "content": "老 王家 养鸡 120 只 ， 是 鸭 的 (4/3) ， 养 的 鹅 又 是 鸭 的 (5/6) ． 养 鹅 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7384", "content": "动物园 里 的 一头 大象 每天 吃 180 千克 食物 ， 一只 熊猫 15 天 吃 540 千克 食物 ． 大象 每天 吃 的 食物 是 熊猫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19707", "content": "625 名 学生 参加 100 米 比赛 ， 跑道 有 5 条 ， 每 赛 一次 可 淘汰 4 名 选手 ， 只 留下 第一名 继续 参加 比赛 ， 需要 赛 多少 次 才能 决出 冠军 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "823", "content": "小 慧 在 统计 本组 期末考试 平均 成绩 时 发现 ： 如果 自己 多 得 15 分 ， 小组 的 平均 成绩 就 达到 92 分 ； 如果 自己 的 成绩 少 得 5 分 ， 小组 的 平均 成绩 就 只有 90 分 ； 那么 小 慧 他们 小组 有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20729", "content": "一 块 地 (4/5) 公顷 ， 其中 (2/5) 种 黄瓜 ， 其余 种 西红柿 ， 种 西红柿 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12159", "content": "乙 数 的 (8/9) 等于 甲 数 ， 甲 数 是 32 ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17695", "content": "150 千克 比 200 千克 少 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17745", "content": "有 算式 [ （ □ - 4 ） * 2 + 8 ] / 3 = 6 中 ， □ 处 应 填入 的 数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6631", "content": "一 个数 的 5 倍 与 它 的 3.6 倍 相差 5.6 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13859", "content": "工程队 修 一段 公路 ， 第一天 完成 全部 工程 的 (3/5) ， 第 二 天 完成 360 米 ， 正好 完成 全部 工程 ， 第一天 完成 了 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8164", "content": "李 叔叔 向 银行贷款 买 了 一辆 汽车 ， 按 银行 规定 首付 应交 车款 的 30% ， 已知 李 叔叔 首付 了 4.8 万元 ， 那么 这辆 车 的 购买 价格 = 多少 万元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21899", "content": "小 明 家养 了 40 只 鸭 ， 是 鸡 的 只 数 的 (5/8) ， 小 明 家养 了 多少 只 鸡 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5403", "content": "在 一棵树 下 用 2 m 长 的 绳子 拴着 一只 羊 ， 这 只 羊 可以 吃 到 草 的 面积 最大 = ？", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "3021", "content": "有 两个 无盖 的 长方体 水箱 ， 甲 水箱 里 有 水 ， 乙 水箱 空 着 ． 从 里面 量 ， 甲 水箱 长 40 厘米 ， 宽 32 厘米 ， 水面 高 20 厘米 ； 乙 水箱 长 30 厘米 ， 宽 24 厘米 ， 深 25 厘米 ． 将 甲 水箱 中 部分 水 倒入 乙 水箱 ， 使 两箱 水面 高度 一样 ， 现在 水面 高 多少 厘米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19446", "content": "一 条 绳子 ， 每 一次 剪 去 它 的 (1/4) 少 5 米 ， 这样 这 条 绳子 一共 剪 7 次 正好 剪 完 ， 这 条 绳子 原来 有 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10076", "content": "2005 年 某 城市 房价 平均 每平方米 5000 元 ， 2006 年 同期 涨 到 6000 元 ， 房价 涨 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10962", "content": "电视机厂 今年 生产 电视机 36000 台 ， 去年 产量 是 今年 的 (1/4) ， 去年 生产 多少 台 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13643", "content": "32 的 75% 是 一个 数 的 25% ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15025", "content": "把 一根 钢管 锯 成 5 段 需要 8 分钟 ， 假如 要 锯 成 20 段 ， 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19568", "content": "同学 们 排队 做操 ， 排 在 小 明 的 前面 有 5 人 ， 排 在 小 明 的 后面 有 3 人 ， 如果 每排 的 人数 一样 多 ， 540 人 可以 排 多少 排 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5623", "content": "李 明 看 一 本书 ， 已经 看 的 比 全书 的 (2/3) 少 6 页 ， 还 剩 全书 的 (2/5) 没 看 ， 全书 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "841", "content": "客 一间 会议室 长 10.8 米 ， 宽 6 米 ． 用 每块 0.36 平方米 的 方砖 铺 地 ， 需要 多少 块 这样 的 方砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19966", "content": "在 长 5 厘米 、 宽 2 厘米 、 高 3 厘米 的 长方体 中 切 一个 最大 的 圆柱 ， 圆柱 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "16176", "content": "张 军 有 25 张 邮票 ， 李 明 的 邮票 张 数 是 张 军 的 (7/5) 倍 ， 王 丽 的 邮票 张 数 是 李 明 的 (4/7) ， 王 丽 有 多少 张 邮票 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6204", "content": "一 个 圆柱形 水池 ， 底面 内 半径 是 2 米 ， 高 是 1.5 米 ， 在 池内 周围 和 底面 抹 上 水泥 ， 抹 水泥 的 面积 = ？", "knowledge": ["*", "+", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "9124", "content": "一 段 公路 长 2400 米 ， 在 公路 一边 每 6 米 种 一棵树 ， 可以 种 多少 棵 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13036", "content": "一 个 长方体 玻璃 水槽 ， 长 40 cm ， 宽 20 cm ， 水深 17 cm ， 在 里面 放入 一块 石头 后 ， 水深 为 19 cm ， 这块 石头 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15051", "content": "小 王 体重 30 千克 ， 小 丽 比 小 王 重 (1/6) ． 小 丽 的 体重 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5556", "content": "图书馆 有 图书 1000 本 ． 四年级 借 走 126 本 ， 五年级 借 走 174 本 ． 图书馆 还 剩 图书 多少 本 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11333", "content": "工地 上 有 一堆 黄沙 ， 第一次 用 去 (1/7) ， 第 二 次 用 去 (1/6) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "816", "content": "一 根 钢管 长 24 米 ， 截去 一部分 后 还 剩下 25% ， 截去 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4189", "content": "学校 举行 运动会 ， 参加 入场式 仪仗队 的 共有 180 人 ， 每 6 人 一行 ， 前后 两行 间隔 1 米 ， 这个 仪仗队 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8553", "content": "由 1 、 2 、 0 、 4 、 35 个 数字 可以 组成 多少 个 3 位数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19066", "content": "李师傅 加工 180 个 零件 ， 第一天 做 了 30 个 ， 第 二 天 做 了 余下 的 (2/5) ， 还 余下 多少 个 零件 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6516", "content": "一 本 《 金字塔 探秘 》 共有 180 页 ， 李 林 看 了 其中 的 45 页 ， 还 剩 全书 的 百分之几 没有 看 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15974", "content": "已知 甲 ： 乙 = 5 ： 7 ； 乙 ： 丙 = 3 ： 4 ， 而且 甲 、 乙 两 数 的 和 是 84 ， 则 乙 、 丙 两 数 的 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21178", "content": "修路 队 修 一条 公路 ， 已修 的 比 剩下 的 少 (1/5) ， 剩下 的 比 已修 的 多 (2/5) 千米 ， 已经 修 了 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20872", "content": "甲 、 乙 两车 分别 从 相距 650 km 的 a 、 b 两地 同时 出发 ， 相向 而 行 ， 5 小时 相遇 ， 甲 车 每 小时 行 70 km ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9697", "content": "小 丁 要 写 42 个 大字 ， 已经 写 好 了 24 个 ， 剩下 的 要 3 分钟 写 完 ， 平均 每分钟 写 几个 大字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14085", "content": "学校 买来 一批 新书 ， 其中 科技 书 80 本 ， 故事书 120 本 ， 这 两种 书 共 占 新书 总数 的 (4/5) ， 这 批 新书 一共 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15037", "content": "某 服装厂 要 生产 2400 件 衬衫 ． 前 3 天 完成 了 40% ， 照 这样 计算 ， 完成 这项 生产 任务 一共 要 用 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19692", "content": "某 玻璃杯 厂 要 为 商店 运送 1000 个 玻璃杯 ， 双方 商定 每个 运费 为 1 元 ， 如果 打碎 一个 ， 这 一个 不但 不 给 运费 ， 而且 要 赔偿 4 元 ． 结果 运到 目的地 结算 时 ， 玻璃杯 厂 共 得 运费 895 元 ， 求 打碎 了 几个 玻璃杯 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15214", "content": "小 明 妈妈 做 水果 生意 ． 今天 进 了 一批 水果 ， 其中 香蕉 50 箱 ， 是 苹果 数量 的 (2/5) ， 苹果 数量 刚好 是 梨 的 (2/9) ， 这 批 水果 中 梨 有 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4955", "content": "甲 、 乙 两地 相距 420 千米 ， 一辆 客车 从 甲地 到 乙地 计划 行驶 7 小时 ． 实际 每 小时 比 原 计划 多 行驶 10 千米 ， 实际 几小时 到达 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "711", "content": "一 种 糖果 4 千克 需 40.62 元 ， 买 同样 的 糖果 5 千克 ， 需 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21234", "content": "125 * 80 * 4 * 2.5 = ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "16674", "content": "有 一包 盐 重 500 克 ， 每天 吃 30 克 ， 吃 了 8 天 ， 还 剩 多少 克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2988", "content": "李 叔叔 写 了 一部 长篇小说 ， 除 800 元 以外 ， 按 14% 交纳 了 532 元 个人所得税 ， 李 叔叔 这次 共 得 了 多少 元 稿费 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17383", "content": "某人 爬山 上 下山 共用 4 小时 ， 已知 上山 用 2.4 小时 ， 下山 的 速度 是 每 小时 7.5 千米 ， 求 上山 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19033", "content": "十 月份 计划 生产 1000 台 机器 ， 实际 超额 200 台 ， 超产 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21177", "content": "县城 朝阳路 长 6.6 千米 ， 由 甲乙 两个 队 合 铺 ， 甲队 每天 铺 0.5 千米 ， 乙 队 每天 铺 的 是 甲队 的 1.2 倍 ， 两队 合 铺 这 段 公路 需要 几天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8543", "content": "天平 一端 放 着 一块 巧克力 ， 另一端 放 着 (1/3) 块 巧克力 和 40 克 的 砝码 ， 这时 天平 恰好 平衡 ． 整块 巧克力 的 质量 = 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7813", "content": "小 王 妈 11 月 2 日 存入 银行 2000 元 ， 定期 二 年 ， 如果 年利率 按 2.5% 计算 （ 10 月 9 日 起 ， 对 储蓄存款 利息 所得 暂免 征收 个人所得税 ） ， 到期 时 应得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10455", "content": "小龙 和 小 丽 住 同一个 院子 ， 上学时 小龙 每分钟 走 80 米 ， 到 学校 用 7 分钟 ， 小 丽 到 学校 用 8 分钟 ， 小 丽 每分钟 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19192", "content": "5 只 鸡 6 天 一共 吃 饲料 2700 克 ， 你 知道 平均 每 只 鸡 每天 吃 饲料 多少 克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5960", "content": "修 一条 水渠 ， 原 计划 每天 修 0.24 千米 ， 15 天 修 完 ． 如果 要 9 天 修 完 ， 每天 应 修 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17125", "content": "班级 图书 柜 有 故事书 118 本 ， 今天 借出 53 本 ， 还 回 33 本 ． 现在 图书 柜 里 还有 故事书 多少 本 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2644", "content": "张 叔叔 0.4 小时 加工 零件 24 个 ， 平均 每 小时 加工 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13961", "content": "38 与 22 的 差 是 它们 的 和 的 几分 之 几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21088", "content": "包装 一批 玩具 小汽车 ， 每箱 装 50 只 ， 需要 48 只 箱子 ． 如果 每箱 装 24 只 ， 需要 多少 只 箱子 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16809", "content": "学校 图书室 买来 了 520 本书 ， 放在 2 个 书架上 ， 每个 书架 有 4 层 ， 平均 每层 放 多少 本书 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "899", "content": "甲 、 乙 两车 同时 从 a 、 b 两城 相对 开出 ， 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 59 千米 ． 两车 相遇 时 ， 甲 车 多行 8 千米 ， 求 a 、 b 两城 的 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "488", "content": "100 公顷 的 20% = 多少 公顷 的 (3/5) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4315", "content": "学校 商店 运 来 4500 本 练习本 ， 卖 了 14 天 后 ， 还 剩下 594 本 ． 平均 每天 卖 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7516", "content": "要 加工 600 件 一样 的 电气设备 ， 加工 了 12 天 后 ， 已 加工 的 件数 与 未加工 的 件数 的 比 是 1 ： 3 ， 按 这样 的 工作效率 ， 加工 完 这 批 设备 ， 一共 要 用 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18134", "content": "一 本书 读 了 60% ， 还 剩下 80 页 没有 读 ， 已 读 了 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12610", "content": "图书 角 有 故事书 和 科技 书 ， 故事书 是 科技 书 的 6 倍 ， 科技 书 有 9 本 ， 故事书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10794", "content": "希望 小学 有 女生 205 人 ， 男生 的 人数 是 女生 的 4 倍 ， 希望 小学 有 多少 学生 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21670", "content": "0.5 增加 多少 后 ， 所得 的 数 是 它 的 5 倍 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16039", "content": "建造 一座 污水 处理厂 ， 实际 投资 是 计划 的 (9/10) ， 比 计划 节约 1.8 万元 ． 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16462", "content": "小 红 骑 自行车 从 甲地 到 乙地 ， 平均 每 小时 行 12 千米 ， 4.2 小时 到达 ， 回去 时 只用 了 3.2 小时 ， 回去 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3163", "content": "一 台 拖拉机 上午 耕地 49.3 公顷 ， 下午 耕地 是 上午 的 1.2 倍 还 多 0.8 公顷 ， 这 台 拖拉机 下午 耕地 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7921", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 50% ， 第 二 天 修 了 全长 的 30% ， 还 剩下 800 米 没有 修 ． 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7193", "content": "一 个数 的 (4/5) 比 120 的 20% 多 56 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5964", "content": "一 个数 的 (2/7) 与 (7/12) 的 (6/7) 相等 ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16403", "content": "红光 饲养场 养 了 小鸡 425 只 ， 母鸡 338 只 ， 公鸡 25 只 ， 鸭子 197 只 ， 问 养 的 鸡 的 只 数 是 鸭 的 多少倍 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10849", "content": "李强 体重 33 千克 ， 比 去年 增加 10% ， 去年 他 的 体重 = 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3749", "content": "把 25 克 盐 放在 100 克 水中 溶 成 盐水 ， 那么 盐 占 盐水 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16691", "content": "甲 、 乙 两地 相距 ， 508 千米 ， 一列 火车 从 甲地 开往 乙地 ， 行驶 了 5 小时 后 还 剩 38 千米 ． 这 列 火车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2462", "content": "梯形 的 上 底 是 5 分 米 ， 下 底 是 8 分 米 ， 高 是 上 底 的 2 倍 ， 它 的 面积 多少 平方分米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22710", "content": "把 20 克 盐 放入 100 克 水 里 配制 成 盐水 ， 300 克 这样 的 盐水 中 含盐 多少 克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19274", "content": "一 条 蚕 大约 吐丝 1500 米 ， 小 红 养 了 6 条 蚕 ， 大约 吐丝 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4081", "content": "把 底面 直径 6 cm ， 高 5 cm 的 圆柱 沿 底面 直径 切开 ， 表面积 增加 了 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23009", "content": "我国 参加 28 届 奥运会 的 男 运动员 138 人 ， 女 运动员 比 男 运动员 的 2 倍 少 7 人 ． 男 、 女 运动员 一共 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3572", "content": "一 个 纸箱 可以 装 35 千克 橘子 ， 现在 有 两堆 橘子 ， 一堆 114 千克 ， 另 一堆 是 166 千克 ， 共 需要 准备 多少 个 纸箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21280", "content": "某 幼儿园 有 一箱 玩具 ， 拿出 它 的 一半 又 3 件 给 中 班 的 小朋友 ， 然后 再 拿出 其余 的 一半 又 2 件 给 大 班 的 小朋友 ， 还 剩下 4 件 ， 问 这 箱 玩具 原来 有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15981", "content": "解放路 商场 原价 为 500 元 的 一件 衣服 ， 现在 按 0.9 优惠 出售 ． 如果 有 贵宾卡 ， 又 可以 按 优惠价 的 80% 出售 ， 那么 用 贵宾卡 买 这件 衣服 的 只 需要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9121", "content": "泾源县 今年 计划 造林 1000 亩 ， 实际 造林 1200 亩 ， 实际 造林 比 计划 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19608", "content": "爷爷 今年 62 岁 ， 东东 今年 8 岁 ， 明年 爷爷 的 年龄 是 东东 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20642", "content": "一 种 运货 的 集装箱 是 长方体 ， 从 里面 量 长 12 米 ， 宽 和 高 都 是 2.4 米 ， 平均 每 立方米 装 一种 化肥 0.5 吨 ， 这个 集装箱 共 装 这种 化肥 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "5117", "content": "一 个 篮球 的 标价 是 60 元 ， 一个 排球 的 标价 是 篮球 的 (17/20) ． 一个 排球 比 一个 篮球 便宜 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18130", "content": "六年级 男生 有 15 人 ， 是 全班 人数 的 (3/8) ， 六年级 一共 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14641", "content": "一 个 隧道 长 2550 米 ， 一列 火车 通过 用 了 28 秒 ， 火车 的 速度 是 每秒 100 米 ， 火车 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16031", "content": "校 举行 冬季 长跑 比赛 ， 最慢 的 同学 平均 每 分 跑 170 米 ， 最快 的 每 分 跑 183 米 ． 5 分钟 后 ， 最快 的 同学 和 最慢 的 同学 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2565", "content": "一 个数 乘 0.75 等于 6 个 2.4 相加 的 和 ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22529", "content": "甲 数 是 648 ， 是 乙 数 的 8 倍 ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3765", "content": "算式 （ 2011 - 9 ） / 0.7 / 1.1 的 计算结果 = ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12742", "content": "一 只 蝴蝶 0.3 小时 飞行 了 6.3 千米 ． 这 只 蝴蝶 每 小时 飞行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11909", "content": "一 段 布 ， 做 上衣 用 去 (2/5) ， 做 裤子 用 去 (1/3) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13080", "content": "挖 一条 水渠 ， 第一天 挖 11.8 km ， 比 第 二 天 少 挖 0.12 km ， 还 剩 0.4 km 没有 挖 ． 这 条 水渠 全长 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9136", "content": "修 一条 长 960 米 的 公路 ， 第一天 修 全长 的 (1/12) ， 第 二 天 修 第一天 的 (9/10) ， 两天 共 修 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2853", "content": "减数 是 8 、 被减数 是 10 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6285", "content": "一 个 饲养 厂 ， 养鸭 1200 只 ， 养 的 鸡 比 鸭 少 (3/5) ， 养 的 鸡 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9674", "content": "甲 数 的 (1/4) 和 乙 数 的 (1/5) 相等 ， 乙 数 是 100 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12168", "content": "一 个 圆形 养鱼池 的 周长 是 500 米 ， 在 4 周 每隔 5 米 栽 一棵 柳树 ， 共 需 栽 柳树 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18400", "content": "小强 和 小 明 两 人 同时 从 家中 出发 相向 而 行 ， 小强 每分钟 走 50 米 ， 小 明 每分钟 走 70 米 ， 经过 20 分钟 两 人 相遇 ， 他们 两家 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22753", "content": "科技 宫 的 套票 原来 每套 30 元 ， 6 一 期间 0.8 优惠 ， 购买 一套 这样 的 套票 能 省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17867", "content": "一 个 梯形 上 、 下 底 之 和 是 16 dm ， 高 是 10 dm ， 它 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11459", "content": "甲 的 (1/4) 比 乙 数多 (1/5) ， 乙 数 为 100 ， 甲 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15467", "content": "花店 先 运 来 14 束 玫瑰花 ， 每 24 朵 是 一束 ， 一共 有 多少 朵花 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21743", "content": "被减数 比 差 大 3.6 ， 减数 比 被减数 小 4.5 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5408", "content": "妈妈 买 回 一瓶 1.8 升 装 的 饮料 招待 明明 的 同学 ． 如果 每杯 倒 0.45 升 ， 这 瓶 饮料 能 倒 几杯 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16241", "content": "张老师 在 银行 存入 20000 元 钱 ， 整存整取 一年 ， 年利率 按 2.50% 算 ， 到期 后 可 取出 本金 和 税后 利息 共 多少 元 ？ （ 按 5% 缴纳 利息税 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "12671", "content": "丽丽 存 了 50.3 元 钱 ， 买 文具 花 了 37.4 元 ， 丽丽 还 剩 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20831", "content": "一 个数 的 (2/5) 是 12 ， 这个 数 倒数 的 (5/6) = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16788", "content": "栽 一种 树苗 ， 成活率 为 90% ， 为 保证 栽 活 540 棵 ， 至少 要 栽 树苗 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9360", "content": "红星 5 金厂 要 改造 设备 ， 向 建设银行 贷款 20 万元 ， 按 年利率 5.4% 计算 ， 2 年 后 要 还 银行利息 和 贷款 共 多少 万元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16709", "content": "一 个数 的 17 倍 是 306 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16828", "content": "开明 出版社 出版 某种 书 ． 今年 每册 书 的 成本 比 去年 增加 10% ． 但是 仍 保持 原 售价 ， 因此 每 本 盈利 下降 了 40% ， 但 今年 的 发行 册数 比 去年 增加 80% ， 那么 今年 发行 这种 书 获得 的 总 盈利 比 去年 增加 的 百分数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8464", "content": "小 刚 有 60 元 零用钱 ， 买 学习用品 花 了 (5/12) ， 买 杂志 花 了 剩余 零用钱 的 (1/5) ， 剩下 的 零用钱 全部 捐给 灾区 的 小朋友 ， 小 刚 向 项 灾区 捐 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "13409", "content": "把 9 米 长 的 铁丝 平均 分成 8 段 ， 其中 的 3 段长 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5092", "content": "某 家电 卖场 售出 同 一种 型号 的 电冰箱 ， 上午 卖出 8 台 ， 下午 卖出 5 台 ， 上午 比 上午 多 收款 7200 元 ， 这种 冰箱 每 台 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "499", "content": "已知 濮阳 与 郑州 相距 180 千米 ， 一辆 汽车 从 濮阳 开往 郑州 ， 已经 走 了 全长 的 (3/4) ， 这辆 汽车 还有 多 远 到达 郑州 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6377", "content": "3 （ 4 ） 班 有 52 人 ， 平均 每人 向 学校 捐 3 本书 ， 一共 捐 了 多少 本 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20413", "content": "食堂 有 192 千克 大米 ， 原 计划 吃 8 天 ， 实际 每天 吃 36 千克 ， 实际 每天 比 原 计划 多 吃 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1782", "content": "学校 有 个 长方体 的 沙坑 ， 用 5.76 立方米 的 黄沙 正好 把 它 填满 ， 测 得 这个 沙坑 的 长 是 3.6 米 ， 宽 是 2 米 ， 这个 沙坑 深 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8081", "content": "一 种 积压 商品 减价 25% 后 ， 每件 售价 48 元 ． 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6041", "content": "一 个 饲养场 ， 养鸭 800 只 ， 养 的 鸭 比 鸡 少 (1/5) ， 养 的 鸡 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14519", "content": "5 （ 1 ） 班 有 27 名 男生 ， 比 女生 少 2 人 ， 女生 占 全班 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4511", "content": "landy 从 家 到 市图书馆 ， 按 每 小时 3 km 的 速度 ， 步行 0.5 h 可以 到达 ． 他 沿着 原 路 回家 ， 按 每 小时 2 km 的 速度 ， 需要 步行 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19815", "content": "一 块 棱 长 是 0.6 米 的 正方体 的 钢坯 ， 锻 成 横截面 是 0.09 平方米 的 长方体 钢材 ， 锻 成 的 钢材 有 多长 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9053", "content": "尤佳 同学 有 一根 彩色 皮筋 ， 剪下 3.53 米 给 小 红 ， 自己 还 剩下 7.9 米 ， 这 跟 皮筋 原先 有 多少 米 长 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20192", "content": "科技园 上午 有 游客 658 人 ， 中午 有 239 人 离去 ． 下午 又 来 了 315 人 ， 这时 园里 有 游客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21968", "content": "一 所 学校 去年 有 350 名 学生 ， 今年 比 去年 增加 了 20% ， 这 所 学校 今年 有 学生 多少 名 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13938", "content": "李老师 对 一些 同学 进行 才艺 小 调查 ， 调查 的 结果 是 ： 会 吹 竖笛 的 有 22 人 ， 会 拉 小提琴 的 有 8 人 ， 其中 既 会 吹 竖笛 又 会 拉 小提琴 的 有 4 人 ． 被 调查 的 同学 至少 会 其中 一种 乐器 ． 李老师 调查 了 多少 名 同学 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9176", "content": "一 本 300 页 的 故事书 ， 小 明 看 了 (2/5) ， 小 明 看 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8389", "content": "李先生 花 880 元 钱 买 了 44 袋 饲料 ． 他 上网 搜索 后 发现 ， 这种 饲料 从 厂家 直接 购货 ， 每 袋 16 元 ． 李先生 一共 多 花 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6936", "content": "工人 叔叔 挖 一条 水渠 ， 已经 挖 了 6 天 ， 每天 挖 580 米 ， 还 剩 2000 米 没 挖 ． 这 条 水渠 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "802", "content": "水果店 进 一批 水果 ， 第一天 卖 了 50% ， 第 二 天 卖 了 余下 的 30% ， 这时 还有 35 千克 没有 卖 ． 这 批 水果 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22488", "content": "李 枫 看 一 本书 ， 第一周 看 了 全书 的 45% ， 第 二 周 看 了 全书 的 (2/5) ， 还有 60 页 没有 看 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11544", "content": "一 种 药水 ， 其中 药粉 与 水 的 质量 比 为 1 ： 120 ． 现有 药粉 2.5 千克 ， 要 配制 这种 药水 需 加水 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9939", "content": "同学 们 到 车站 参加 义务劳动 ， 男生 占 45% ， 女生 有 33 人 ． 参加 义务劳动 的 一共 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22325", "content": "一 种 冰箱 原价 2100 元 ， 现在 打 0.85 出售 ， 现在 购 一台 冰箱 需 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2668", "content": "有 甲 、 乙 两个 粮食 仓库 ， 如果 从 甲 仓库 运 10 吨 粮食 到 乙 仓库 ， 这时 甲 仓库 的 存粮 是 乙 仓库 的 40% ， 已知 甲 仓库 原 存粮 110 吨 ， 乙 仓库 原 存粮 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1860", "content": "用 10 克 糖 配制 成 含糖 率 为 20% 的 糖水 ， 需 加水 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19919", "content": "泸西县 氮肥厂 前 8 个 月 每月 生产 化肥 103 吨 ， 后 4 个 月 共 生产 443 吨 ， 平均 每季度 生产 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11120", "content": "两辆 汽车 同时 从 水泥厂 出发 ， 将 一批 水泥 送到 距 这里 165 千米 的 工地 上 ， 甲 车 比 乙 车 早 到 0.8 小时 ， 当 甲 车 到达 时 ， 乙 车 离 工地 还有 24 千米 ， 甲 车 行驶 全程 用 了 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3498", "content": "学校 买来 73 盒 粉笔 ， 拿给 二 （ 1 ） 班 10 盒 后 ， 剩下 的 要 分给 7 个 班 ， 平均 每个 班 分 到 多少 盒 粉笔 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13559", "content": "一 座 城市地图 上 两 地图 上 距离 为 10 cm ， 表示 实际 距离 30 km ． 在 这 座 城市 中 有 一 湖 ， 湖面 一 周长 27.6 千米 ． 湖 在 这 幅 地图 上 湖面 一 周长 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10831", "content": "前进 乡 计划 挖 一条 300 米 长 的 水渠 ， 已经 挖 了 (4/5) ， 还 剩下 多少 米 没 挖 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19409", "content": "菜地 里 西红柿 获得 丰收 ， 收下 全部 的 (2/5) 时 ， 装满 了 3 筐 还 多 16 千克 ， 收完 其余部分 时 ， 又 刚好 装满 6 筐 ， 则 共 收 得 西红柿 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12422", "content": "10 枚 5 分 的 硬币 重 27 克 ． 现在 有 一摞 同样 的 硬币 共 351 克 ， 这 摞 硬币 共有 多少 枚 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11625", "content": "一 种 药品 的 用药量 是 ： 成人 每千克 体重 每次 用药 0.06 克 ， 是 一个 儿童 每千克 体重 每次 用药量 的 2.5 倍 ． 如果 幼儿园 大 班 有 个 小朋友 的 体重 是 20 千克 ， 他 每次 只能 用药 多少 克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8084", "content": "饲养 小组 养 了 12 只 白兔 ， 白兔 的 只 数 与 黑 兔 的 只 数 比 是 2 ： 3 ， 饲养 小组 一共 养 了 多少 只 白兔 和 黑 兔 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "693", "content": "一 条 绳子 长 2 分 米 ， 正好 可以 绕 着 桌面 围 两圈 ， 桌子 的 周长 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16800", "content": "一 个数 除以 15 商 12 余 14 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4364", "content": "平原 机械厂 计划 每天 生产 56 个 机器 零件 ， 28 天 完成 ． 实际 每天 生产 98 个 ， 实际 多少 天 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "271", "content": "一 个 比例 的 两个 内 项 分别 是 0.7 和 30 ， 两个 外 项 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "260", "content": "计划 修 一条 360 米 长 的 公路 ， 前 5 天 修 了 这 条 公路 的 25% ， 照 这样 计算 ， 修 完 这 条 公路 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9387", "content": "印刷厂 每天 装订 340 本 日记本 ， 一 星期 （ 7 天 ） 装订 完 ， 一共 装订 了 多少 本 日记本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20864", "content": "三年级 240 名 同学 去 参观 国庆 62 周年 展览 ， 平均 分成 3 批 ， 每批 平均 分成 5 组 ， 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13210", "content": "长 凤 公园 原有 25 条 小 游船 ． 一天 出 租费 收入 1000 元 ． 照 这样 计算 ， 如果 再 增加 8 条 ． 一天 可 多 收入 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18413", "content": "停车场 有 158 辆 汽车 ， 一个 小时 后 ， 只有 128 辆 汽车 在 停车场 ． 问 开走 的 汽车 占 原 总 汽车 辆 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16924", "content": "3.08 / 1.76 与 2.5 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2096", "content": "有 一桶 油 重 80 千克 ， 第一次 取出 全 桶 的 (1/4) ， 第 二 次 取出 余下 的 40% ， 桶 里 还 剩 油 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "532", "content": "服装厂 计划 做 400 套 服装 ， 已经 完成 154 套 ． 剩下 的 要 在 6 天 完成 ， 平均 每天 要 做 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13555", "content": "星期日 小 明 计划 做 50 道口 算题 ， 实际 做 了 80 道 ． 实际 比 计划 多 做 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20691", "content": "张老师 要 批改 52 篇 作文 ， 已经 改 了 20 篇 ． 如果 每 小时 改 8 篇 ， 还要 多少 小时 才 可以 批改 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17505", "content": "红星 加工厂 要 生产 5400 个 零件 ， 6 天 生产 了 1800 个 ． 照 这样 计算 ， 几天 可以 完成 任务 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20350", "content": "水泥厂 仓库 里 有 水泥 500 吨 ， 甲 车队 一次 可以 运走 总数 的 12% ， 乙 车队 一次 可 运走 总数 的 20% ． 如果 让 两个 车队 一 起来 运 ， 一次 共 可 运走 多少 吨 水泥 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5484", "content": "粮店 运 来 一批 大米 ， 第一周 卖出 (1/4) ， 第 二 周 卖出 (1/5) ， 还 剩 22 吨 ， 这 批 大米 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18852", "content": "有 红花 20 朵 ， 比 黄花 少 (1/5) ， 黄花 有 多少 朵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "717", "content": "小 明 读 一本 故事书 ， 每天 读 全书 的 (1/15) ， 3 天 后 还 剩 240 页 没有 读 ， 这本 故事书 书 一共 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6142", "content": "某 年级 原有 男 、 女生 325 人 ， 新学年 男生 增加 25 人 ， 女生 减少 5% ， 总 人数 增加 16 人 ， 那么 现有 男生 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17897", "content": "6300 - 1050 与 45 的 和 乘 2 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12990", "content": "同学 们 参加 艺术 操 表演 ， 336 个 学生 排成 7 个 方阵 ， 每个 方阵 站 4 列 ， 每 列 有 多少 个 学生 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12088", "content": "计算 1 - 0.6 - 0.06 - 0.006 - 0.0006 = ．", "knowledge": ["-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10296", "content": "一 袋 化肥 ， 第一次 用 去 它 的 (2/7) ， 第 二 次 用 去 它 的 (1/5) ， 还 剩下 这 袋 化肥 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1348", "content": "百货商场 上午 卖出 洗衣机 18 台 ， 下午 卖出 同样 的 洗衣机 13 台 ， 下午 比 上午 少收 货款 3910 元 ， 每 台 洗衣机 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14246", "content": "小 东 家养 的 鸡 一 天下 了 8 个 蛋 ， 一共 (2/5) 千克 ， 平均 每个 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11863", "content": "一 本书 共 70 页 ， 每页 有 20 行 ， 每行 25 个 字 ． 这 本书 大约 有 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14037", "content": "甲乙 两 人 共同 生产 一批 零件 ， 甲 每 小时 生产 28.5 个 ， 乙 每 小时 生产 35 个 ， 甲 在 中 路途 因为 修理 机器 耽误 了 一 小时 ， 5 小时 后 ， 这 批 零件 全部 生产 完 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "5333", "content": "钢铁厂 要 生产 一批 钢材 ， 计划 每天 生产 600 吨 ， 20 天 完成 ． 实际 每天 生产 800 吨 ， 实际 比 原 计划 提前 几天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20486", "content": "2.7 与 4.5 的 和 除以 12 ， 得出 的 商 再 乘 0.3 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16803", "content": "张 大爷 将 2000 元 存入 银行 ， 定期 3 年 ， 年利率 为 3.14% ， 到期 时 他 可 取回 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4483", "content": "五年级 一班 同学 去 植树 ， 植 杨树 40 棵 ， 是 植 柳树 棵 数 的 5 倍 ， 五年级 一班 植 柳树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20728", "content": "食堂 运 来 面粉 23 袋 ， 运 来 的 大米 是 面粉 的 4 倍 ， 运 来 的 大米 比 面粉 多 多少 袋 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12556", "content": "40 人 参加 测验 ， 答对 第一 题 的 有 30 人 ， 答对 第 二 题 的 有 21 人 ， 两 题 都 答对 的 有 15 人 ， 两 题 都 没 答对 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4409", "content": "一 辆 卡车 ， 3 次 运 苹果 480 箱 ， 照 这样 计算 ， 再 运 2 次 ， 一共 可以 运 多少 箱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19733", "content": "三年级 图书 角 原有 图书 218 本 ， 借出 89 本 ， 还 回 67 本 ． 现有 图书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2055", "content": "学校 买来 一批 练习册 ， 分给 24 个 班 ， 每班 46 本 ， 还 剩 434 本 ， 学校 买来 多少 本 练习册 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20502", "content": "一 种 围巾 打 0.9 后 的 售价 为 270 元 ， 这种 围巾 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8736", "content": "客车 每 小时 行 60 千米 ， 货车 的 速度 是 客车 的 (5/6) ． 客货 两车 同时 从 甲 、 乙 两站 相对 开出 ， 8 小时 相遇 ， 甲乙 两站 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "7538", "content": "减数 是 268 ， 差 是 507 ， 被减数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20676", "content": "商店 运 来 苹果 (3/5) 吨 ， 运 来 梨 的 吨数 是 苹果 的 (5/6) ． 运 来 的 苹果 和 梨 一共 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14187", "content": "3 个 同学 分 练习本 ， 甲 得到 的 比 总数 的 一半 少 5 本 ， 乙 得到 的 比 余下 的 一半多 2 本 ， 丙 得到 12 本 ， 求 共有 练习本 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22006", "content": "鲜 羊肉 煮熟 后 只有 它 原 重量 的 (13/20) ， 要 加工 熟 羊肉 260 克 ， 需要 鲜 羊肉 多少 克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13964", "content": "晓 峰 有 邮票 48 张 比 小 华 少 5 张 ， 小 华 有 邮票 多少 张 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8150", "content": "学校 开展 “ 献爱心 ” 活动 ， 四年级 同学 捐款 898.8 元 ， 比 五年级 多 58.2 元 ， 两个 年级 共 捐款 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9166", "content": "一 个 因数 是 105 ， 另 一个 因数 是 8 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14445", "content": "甲 数 的 (2/3) 等于 乙 数 的 40% ， 甲 数 的 (1/2) 是 45 ， 乙 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16396", "content": "汪洋 的 身高 是 1.21 米 ， 比 肖 杰 矮 0.19 米 ， 肖 杰 的 身高 = 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16423", "content": "修 一条 2008 米 的 水渠 ， 已经 修 了 25 天 ， 还 剩下 783 米 没有 修 ， 平均 每天 修 了 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9621", "content": "学校 做 一批 服装 ， 每套 用 3.2 米 ， 可以 做 300 套 ， 由于 改进 裁剪 技术 ， 每套 可以 节省 0.2 米 ， 如果 还 用 这 批 布 做 校服 ， 可以 多 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "746", "content": "大润发 超市 运 来 伊利 牛奶 250 箱 ， 运 来 的 蒙牛 牛奶 比 伊利 牛奶 少 (2/5) ． 运 来 蒙牛 牛奶 多少 箱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6708", "content": "一 杯水 ， 喝 了 (2/4) 又 倒 进 了 (1/4) ， 现在 还有 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1653", "content": "仓库 里 有 水泥 88 吨 ， 先 运走 45.2 吨 ， 又 运走 32.8 吨 ， 还 剩 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9338", "content": "某村 去年 植树造林 20 公顷 ， 今年 植树 比 去年 多 5 公顷 ， 今年 植树 比 去年 多 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "322", "content": "东方 果汁厂 4 分钟 生产 果汁 428 瓶 ， 平均 每分钟 生产 果汁 多少 瓶 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16905", "content": "明明 和 亮 亮 参加 1000 米 的 比赛 ． 明明 已经 跑 了 750 米 ， 亮 亮 离 终点 还有 180 米 ， 明明 离 终点 还有 多少 米 ？ 他们 两 人 谁 跑得快 些 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5930", "content": "一 个 底面 直径 8 厘米 的 圆柱形 量杯 ， 里面 装有 5 厘米 深 的 水 ． 把 一个 圆锥形 铁块 放 完全 浸没 在 水中 ， 水面 上升 了 2 厘米 ． 这个 圆锥形 铁块 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "20752", "content": "利民 水果店 运 来 200 箱 梨 ， 运 来 的 桔子 比 梨 多 160 箱 ， 运 来 苹果 的 箱 数 比 桔子 的 箱 数 的 2 倍 少 38 箱 ． 利民 水果店 运 来 苹果 多少 箱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15393", "content": "0.25 * 19 + (3/4) * 27 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12057", "content": "工程队 修 一条 长 (3/4) 千米 的 道路 ． 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 全长 的 (1/3) ． 还 剩 全长 的 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11978", "content": "小 明 到 学校 一共 有 12 棵 树 （ 两端 都 栽 ） ， 每棵 树 相距 200 米 ， 小 明 平均 一分钟 走 50 米 ， 那么 他 走 到 学校 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14008", "content": "山西 煤矿 ， 去年 采煤 2400 万吨 ， 今年 采煤 量 比 去年 多 60% ， 今年 采煤 多少 万吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20119", "content": "一 辆 汽车 每 小时 行 80 千米 ， 是 一个 人 每 小时 步行 速度 的 20 倍 ， 一架 飞机 每 小时 飞行 的 路程 又 是 步行 的 200 倍 ， 这 架飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2", "content": "一 个 工程队 挖土 ， 第一天 挖 了 316 方 ， 从 第 二 天 开始 每天 都 挖 230 方 ， 连续 挖 了 6 天 ， 这个 工程队 一周 共 挖土 多少 方 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6712", "content": "学校 餐厅 购买 了 108 千克 西红柿 ， 比 黄瓜 多 (1/8) ， 购买 黄瓜 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10075", "content": "一 台 压路机 ， 前轮 的 作业 宽度 2 米 ， 工作 时 每分钟 前进 75 米 ， 这 台 压路机 工作 20 分钟 ， 前轮 压路 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19582", "content": "同学 们 参加 学雷锋 活动 ， 全校 分成 12 队 ， 每队 分 5 组 ， 每组 有 9 人 ， 全校 共有 多少 人 参加 学雷锋 活动 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10355", "content": "一 桶 油 倒 出 36 千克 ， 正好 是 这 桶 油 的 (3/4) ， 这 桶 油 一共 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9956", "content": "小 明 、 小 亮 想 买 同一 本书 ， 小 明 带 的 钱 少 1.8 元 ， 小 亮 带 的 钱 少 1.5 元 ． 若 两 人 合 买 这 本书 ， 钱 刚好 够 ， 这 本书 的 价钱 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1336", "content": "一 袋 面粉 ， 吃 了 15 千克 ， 正好 是 这 袋 面粉 的 (3/4) ， 这 袋 面粉 还 剩 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9177", "content": "用 650 与 150 的 差 去除 275 与 225 的 和 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18197", "content": "甲 的 岁数 和 乙 的 岁数 的 比 是 4 ： 5 ， 甲 的 岁数 是 乙 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5353", "content": "一 堆 煤 ， 第一天 运走 它 的 (2/9) ， 第 二 天 运走 43 吨 ， 两天 运走 这 堆 煤 的 (1/3) ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15560", "content": "一 个 平行四边形 的 两条 边 分别 长 7 cm 和 10 cm ， 其中 一条 边上 的 高 是 8 cm ， 这个 平行四边形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19386", "content": "3 、 四年级 的 同学 去 植树 ， 三年级 有 88 人 ， 四年级 有 87 人 ． 5 名 同学 分为 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10142", "content": "某班 同学 中 有 39 人 打篮球 ， 37 人 跑步 ， 25 人 既 打篮球 又 跑步 ， 问 全班 参加 篮球 、 跑步 这两项 体育 活动 的 总 人数 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18315", "content": "比 596 多 431 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20570", "content": "王 阿姨 做 3 条 同样 的 裤子 用布 2.7 米 ， 还 打算 做 4 件 同样 的 上衣 ， 每件 上衣 用布 量 是 每 条 裤子 的 1.5 倍 ． 王 阿姨 做 上衣 用布 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20516", "content": "(3/4) 的 (2/9) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9371", "content": "一 个数 的 (1/4) 是 25 ， 这个 数 的 85% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19412", "content": "粮店 运 来 48 kg 面粉 ， 运 来 的 大米 比 面粉 的 5 倍 少 100 kg ． 粮店 运 来 大米 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5078", "content": "在 一道 小数 减法 中 ， 差 是 5.27 ， 如果 被减数 少 0.5 ， 减数 增加 0.4 ， 则 现在 的 差 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5976", "content": "甲乙 两地 相距 600 千米 ， 一辆 客车 和 一辆 货车 同时 从 两地 相向 开出 5 小时 相遇 ， 货车 每 小时 行 50 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "648", "content": "学校 购买 了 99 套 单人 课桌椅 ， 课桌 每张 64 元 ， 椅子 每 把 36 元 ． 学校 购买 课桌椅 共 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6232", "content": "某人 从 甲地 到 乙地 需要 (1/3) 小时 ， 他 走 了 (1/5) 小时 ， 还有 960 米 没有 走 ， 他 已经 走 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8576", "content": "两组 同学 跳绳 ， 第一组 有 25 人 ， 平均 每人 跳 80 下 ； 第 二 组 有 20 人 ， 平均 每人 比 两组 同学 跳 的 平均数 多 5 下 ， 两组 同学 平均 每人 跳 几下 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "795", "content": "铺设 一条 长 10 千米 的 道路 需 7 天 完成 ， 平均 每天 铺设 的 道路 长度 为 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3440", "content": "红球 重 (3/4) 千克 ， 黄 球 的 质量 是 红球 的 (1/9) ， 这 两个 球 共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19537", "content": "6 （ 1 ） 班 星期一 的 出勤率 为 95% ， 未 出勤 的 是 出勤 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18608", "content": "2 位 教师 带 58 名 学生 游园 ， 他们 每人 想 喝 一瓶 汽水 ， 至少 要 买 多少 瓶 汽水 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22481", "content": "有 一根 木料 ， 打算 锯 成 5 段 ， 每次 锯下 一小 段 用 3 分钟 ， 全 锯 完 用 几分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21782", "content": "小 红 前面 有 25 个 小朋友 ， 她 后面 有 10 个 小朋友 ， 一共 有 多少 个 小朋友 排队 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22532", "content": "做 一幅 窗帘 大约 用 6 米 布 ． 现在 有 228 米 布 ， 做 了 一些 窗帘 后 ， 还 剩 18 米 布 ， 已经 做好 了 多少 幅 窗帘 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19487", "content": "某 工程队 修路 ， 第一 星期 完成 了 全长 的 32% ， 第 二 星期 完成 了 全长 的 43% ， 还 剩下 600 米 没有 修 ， 问 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15033", "content": "图书馆 有 985 本 故事书 ， 四年级 同学 借 走 了 509 本 ， 三年级 的 同学 还 来 452 本 ， 现在 图书馆 有 故事书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1874", "content": "六年级 植树 378 棵 ， 六年级 植树 的 棵 树 比 五年级 多 (1/8) ， 五年级 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22641", "content": "金 甲 百货商店 有 一种 布料 ， 每 米 售价 12.5 元 ， 张 阿姨 用 100 元 买 4 米 这样 的 布料 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16357", "content": "甲地 到 乙地 的 公路 长 250 千米 ， 一辆 客车 和 一辆 货车 同时 从 甲地 开往 乙地 ， 客车 每 小时 行 100 千米 ， 货车 每 小时 行 80 千米 ． 客车 到达 乙地 时 ， 货车 离 乙地 还有 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22545", "content": "车站 有 一批 货物 ， 上午 运走 了 总数 的 20% ， 下午 运走 了 总数 的 40% ， 下午 比 上午 多 运 了 3 吨 ， 这 批 货物 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8716", "content": "学校 更换 了 42 套 单人 课桌椅 ． 每张 桌子 55 元 ， 每 把 椅子 35 元 ， 购买 这些 课桌椅 要 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2541", "content": "小船 可 载重 12 吨 ， 大船 的 载重量 比 小船 的 25 倍 还 多 5 吨 ， 大船 的 载重量 = 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3832", "content": "节日 里 ， 要 在 240 米 长 的 城楼 上 插 上 彩旗 ， 每隔 5 米 插 一面 （ 两端 都 要 插 ） ， 一共 要 插 多少 面 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12598", "content": "四年级 二 班 要 买 49 套 校服 ， 一件 上衣 35 元 ， 一条 裤子 25 元 ， 一共 要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1560", "content": "张 村 去年 只有 24 家 有 电视机 ， 今年 又 有 30 家 新 买 了 电视机 ． 张 村 现在 有 电视机 的 家庭 是 去年 的 多少倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14402", "content": "甲 从 a 地 往 b 地 ， 乙 、 丙 两 人 从 b 地 往 a 地 ， 3 人 同时 出发 ， 甲 首先 在 途中 与 乙 相遇 ， 之后 15 分钟 又 与 丙 相遇 ， 甲 每分钟 走 70 米 ， 乙 每分钟 走 60 米 ， 丙 每分钟 走 50 米 ， 问 ： a 、 b 两地 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22275", "content": "甲 是 120 ， 比 乙 数 的 (1/3) 少 30 ， 乙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3220", "content": "一 根 绳子 剪 去 了 20.5 米 ， 比 剩下 的 短 3.6 米 ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19873", "content": "某 中学 春季 计划 植树 250 棵 ， 实际 植树 295 棵 ． 实际 植树 是 计划 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6909", "content": "40 减去 它 的 25% 得 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11769", "content": "两个 工程队 合 挖 一条 隧道 ， 当 甲队 挖 了 150 米 时 ， 乙 队 比 甲队 多 挖 了 (1/6) ， 这时 两个 队 正好 挖 了 全长 的 65% ． 这 条 隧道 全长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3705", "content": "一 桶 油 10 千克 ， 用 去 了 这 桶 油 的 (4/5) ， 用 去 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8651", "content": "一 本书 240 页 ， 小 明 6 天 看 了 全书 的 (3/5) ， 他 平均 每天 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9676", "content": "拖拉机厂 上个月 上 半月 生产 拖拉机 180 辆 ， 下半月 生产 拖拉机 140 辆 正好 完成 生产 任务 ， 下半月 完成 了 全 月 生产 任务 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23037", "content": "学校 有 20 个 足球 ， 篮球 比 足球 多 (1/4) ， 篮球 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2586", "content": "学校 美术 小组 有 25 人 ， 美术 小组 的 人数 比 书法 小组 多 (1/4) ． 书法 小组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22410", "content": "一 套 衣服 卖 170 元 ， 赚 了 70% ， 那么 这 套 衣服 的 进价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22054", "content": "菜农 张 大伯 摘 到 8400 千克 大白菜 ， 准备 供应 给 4 个 菜场 ， 在 装运 的 过程 中 损耗 了 0.1% ， 平均 每个 菜场 能 运到 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15202", "content": "一 列 快车 ， 车长 250 米 ， 每分钟 行 500 米 ． 这 列 快车 通过 一个 长 850 米 的 隧道 ， 需要 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10749", "content": "张老师 存 银行 20000 元 ， 定期 5 年 ， 年利率 3.2% ， 到期 张老师 可 得 税后 利息 多少 元 ． （ 注 ： 利息税 按 20% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8991", "content": "欢度 6 一 儿童节 ， 同学 们 做 了 30 朵 蓝花 ， 黄花 是 蓝花 的 2 倍 ， 红花 比 蓝花 和 黄花 的 总数 多 10 朵 ． 他们 做 了 多少 朵 红花 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15750", "content": "小 明 爸爸 每月 的 工资 是 840 元 ， 是 她 妈妈 每月 工资 的 (5/8) ， 问 小 明 妈妈 每月 工资 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5165", "content": "一 条 公路 全长 210 千米 ， 一辆 汽车 3 小时 行 135 千米 ， 照 这样 计算 ， 剩下 的 还要 行 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "765", "content": "王老师 有 500 元 钱 ， 买下 5 个 足球 ， 每个 20 元 ， 剩下 的 钱 正好 买 了 8 个 篮球 ， 每个 篮球 多少 元 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20841", "content": "把 5 米 长 的 竹竿 竖直 插入 水中 ， 竹竿 入 泥 部分 是 0.35 米 ， 露出 水面 部分 1.08 米 ， 水池 中 的 水深 = 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4456", "content": "比 420 少 56 的 数 的 4 倍 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15882", "content": "用 一张 长 15 厘米 ， 宽 12 厘米 的 长方形 纸 围成 一个 圆柱 ， 这个 圆柱 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20521", "content": "水 结成 冰 后 ， 体积 增加 10% ， 一块 体积 是 3.3 立方米 的 冰 ， 融化 成 水 后 体积 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14678", "content": "有 一个 数列 ， 4 、 10 、 16 、 22 、 … 70 ， 这个 数列 共有 多少 项 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17918", "content": "一 筐 桔子 ， 连 筐 重 50 千克 ， 卖出 了 (2/5) 后 ， 连 筐 还 重 36 千克 ． 这 筐 桔子 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5946", "content": "甲 数 是 (4/15) ， 比 乙 数 少 (1/5) ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2938", "content": "救灾 中心 集中 了 一批 救灾物资 ， 分批 运往 地震 灾区 ， 第一次 运出 480 件 ， 第 二 次 运出 总数 的 37.5% ， 这时 剩下 的 件数 与 运出 件数 的 比 是 5 ： 7 ． 这 批 救灾物资 共有 多少 件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17277", "content": "两个 工程队 18 天 合作 修 完 一条 1044 米 的 公路 ， 甲队 每天 修 30 米 ， 乙 队 每天 修 几米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12110", "content": "某班 有 46 人 ， 其中 会 骑车 的 有 27 人 ， 会 游泳 的 有 14 人 ， 既 会 骑车 又 会 游泳 的 有 5 人 ， 两样 都 不会 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7618", "content": "小 芳 将 一根 丝带 剪成 同样 长 的 8 段 ， 每 段长 (5/12) 米 ． 这根 丝带 原来 长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17271", "content": "一 个数 ， 乘以 2 再 减去 31 ， 加上 26 后 除以 9 ， 结果 为 7 ， 这个 数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11704", "content": "已知 两个 因数 的 积 是 0.12 ， 其中 一个 因数 是 6 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17074", "content": "用 一辆 汽车 运送 水泥 ， 上午 运 4 次 ， 平均 每次 运 875 千克 ； 下午 运送 5 次 ， 平均 每次 运 900 千克 ， 这辆 汽车 一天 共运 水泥 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16329", "content": "一 袋 土豆 ， 吃 了 它 的 (2/5) ， 还 剩 30 千克 ， 这 袋 土豆 原有 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8711", "content": "童 童 问 爸爸 ： “ 爸爸 ， 你 一个月 发 多少 工资 呀 ？ ” 爸爸 说 ： “ 告诉 你 吧 ， 我 每月 把 工资 的 60% 留 作 日常 开支 ， 把 剩下 的 工资 和 妈妈 节余 的 360 元 一起 存入 银行 ． 这样 每月 存 人 银行 的 钱 恰好 是 我 工资 的 (5/8) ． 你 自己 去 算 吧 ！ ” 你 知道 童 童 的 爸爸 每月 的 工资 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17352", "content": "有 一个 立于 公路 路口 的 圆柱形 中空 水泥 广告 柱 ， 底面 直径 是 1.2 米 ， 高 2 米 ， 将 它 的 表面 涂 上 红色 油漆 ， 估计 每千克 油漆 可以 涂 2.4 平方米 ， 涂 完 这根 柱子 需要 油漆 多少 千克 ？ （ 根据 生活 实际 考虑 好 哪些 面 用 涂 油漆 ）", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16183", "content": "三年级 的 学生 去 茶园 里 劳动 ， 女生 有 31 人 ， 男生 有 26 人 ， 3 名 学生 分成 一组 ， 一共 可以 分成 几组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13788", "content": "小 华 3 分钟 步行 210 米 ， 汽车 每分钟 的 速度 是 小 华 步行 速度 的 9 倍 ， 汽车 每分钟 行 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14057", "content": "一 箱 鱼片 24 袋 ， 其中 6 大袋 ， 每 袋 9 元 ； 余下 的 是 小袋 ， 每 小袋 5 元 ． 那么 这 箱 鱼片 的 价格 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17653", "content": "红旗 工程队 修 一段 公路 ， 7 天 修 了 (21/25) 千米 ． 平均 每天 修 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8155", "content": "小 红 打 一篇 576 字 的 作文 ， 12 分钟 就 完成 了 ． 平均 每分钟 打 多少 个 字 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5392", "content": "一 个数 的 (4/5) 是 80 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8592", "content": "王师傅 计划 每天 加工 45 个 零件 ， 需 8 天 完成 ， 实际 5 天 就 完成 了 ， 实际 平均 每天 比 计划 多 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20392", "content": "一 头 海象 体重 大约 是 1.13 吨 ， 北极熊 的 体重 比 海象 轻 0.48 吨 ， 白鲸 比 一只 北极熊 重 0.5 吨 ， 一头 白鲸 重 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17696", "content": "小 玲 和 小 丽 两 人 读 同一 本 故事书 ， 小 玲 读 了 24 页 ， 占 全书 的 37.5% ， 小 丽 读 了 全书 页数 的 (9/16) ， 小 丽 读 了 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8311", "content": "一 种 小汽车 ， 原来 每辆 售价 15 万元 ， 现在 每辆 售价 12 万元 ， 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21478", "content": "一 天 某 生产 小组 前 3 小时 共 生产 零件 510 个 ， 后 5 个 小时 每 小时 生产 零件 186 个 ， 这 一天 平均 每 小时 生产 零件 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10495", "content": "同学 们 在 果园 劳动 ， 第一组 摘 苹果 124 千克 ， 第 二 组 摘 苹果 146 千克 ． 把 这些 苹果 平均 装 在 30 个 箱子 里 ， 每箱 装 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15767", "content": "一 件 商品 原价 420 元 ， 现在 优惠 20% ， 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6940", "content": "修 一条 公路 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 全长 的 (2/7) ， 还有 180 米 没 修 ， 这 条 公路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6653", "content": "水果店 运 来 7 筐 苹果 ， 卖 了 150 千克 ， 还 剩 60 千克 ． 平均 每 筐 苹果 重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6037", "content": "一 个 长方形 地 ， 面积 是 480 米 ， 宽 是 8 米 ， 长 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2793", "content": "“ 青青草原 ” 组织 兴趣小组 ． 参加 书法 组 的 有 8 人 ， 参加 绘画 组 的 有 24 人 ， 参加 唱歌 组 的 人数 比 绘画 组 的 人数 多 2 倍 ， 唱歌 组 的 人数 是 书法 组 人数 的 多少倍 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15275", "content": "某 8 个数 的 平均数 为 50 ， 若 把 其中 的 一个 数 改为 90 ， 则 平均数 变为 了 60 ， 被 改动 的 这个 数 原来 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15983", "content": "植树节 那天 ， 五年级 同学 栽 了 54 棵 树 ， 六年级 同学 比 五年级 多 栽 (1/9) ． 六年级 同学 栽 了 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "667", "content": "手帕 厂 原 计划 8 月 生产 手帕 780 打 ， 采用 新 的 生产 流水线 后 ， 生产 的 手帕 运走 了 460 打 ， 还 剩 485 打 ， 比 原 计划 增产 多少 打 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5681", "content": "一 堆 沙 运走 了 总 吨数 的 (2/7) ， 剩下 的 比 运走 的 多 2.1 吨 ， 这 堆 沙 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7849", "content": "修 一条 水渠 ， 已经 修 了 (3/4) ， 剩下 18 千米 ， 这 条 水渠 有 多长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11562", "content": "11 届 13 班 同学 做 广播操 ， 如果 每行 站 10 人 ， 需要 站 6 行 ， 如果 每行 增加 5 人 ， 需要 站 多少 行 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11902", "content": "某 花生 牛奶 厂 每天 向 超市 运送 4500 箱 新 牛奶 ． 今天 已经 运送 了 20 车 ， 每 车运 165 箱 ， 还有 多少 箱 没有 运送 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11146", "content": "一 个 儿童 体内 所 含水 份 有 25 千克 ， 只 占 体重 的 (5/8) ， 这个 儿童 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2973", "content": "甲 车 每 小时 行 45 千米 ， 乙 车 每 小时 行 60 千米 ． 两车 分别 从 a 、 b 两地 同时 出发 ， 相向 而 行 ， 相遇 后 4 小时 甲 车 到达 b 地 ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22306", "content": "一 个数 的 (2/5) 正好 是 (8/25) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13082", "content": "王 叔叔 办理 了 一张 手机卡 ， 这种 手机卡 的 收费 标准 是 ： 每月 固定 收费 10 元 ， 此外 每 通话 1 分钟 收费 0.2 元 （ 接听电话 也 包含 在内 ） ． 王 叔叔 在 卡 中 存 了 50 元 钱 ， 本月 他 可以 通话 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22330", "content": "20 名 羽毛球 运动员 参加 单打 比赛 ， 两 两 配对 进行 单 单循环赛 ， 那么 冠军 一共 要 比赛 多少 场 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12157", "content": "粮店 一天 卖出 面粉 95 千克 ， 卖出 的 大米 是 面粉 的 16 倍 ， 这天 卖出 大米 和 面粉 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2933", "content": "商店 促销 活动 是 在 原价 的 基础 上 0.8 后 再 打 0.7 ， 一件 衣服 现价 是 56 元 ， 这件 衣服 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3866", "content": "一 段 10 米 长 的 电线 ， 用 去 了 6 米 ， 则 用 去 了 全长 的 多少 （ 用 分数 表示 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21775", "content": "淘气 今年 11 岁 ， 爷爷 的 年龄 是 他 的 6 倍 多 8 岁 ． 爷爷 今年 几岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11361", "content": "学校 体操队 有 队员 240 人 ， 比 舞蹈队 人数 的 3 倍 少 30 人 ， 舞蹈队 有 队员 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1344", "content": "一 头牛 重 605 千克 ， 大象 的 体重 是 牛 的 8 倍 ， 大象 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20278", "content": "2 / 5 的 商用 分数 表示 ： 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9716", "content": "把 一根 粗细 均匀 的 木头 锯 成 3 段 ， 要 用 12 分钟 ， 如果 把 它 锯 成 6 段 ， 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3040", "content": "14 与 72 的 积 减去 900 所得 的 差 除以 3 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2191", "content": "一 种 药水 是 把 药粉 和 水 按 1 ： 100 配制 成 的 ， 那么 药粉 占 药水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7249", "content": "a 是 b 的 (3/4) ， c 是 b 的 25% ， 那么 a 是 c 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14586", "content": "鲜花店 共 购进 鲜花 450 盆 ， 其中 “ 月季花 ” 占 总数 的 (2/9) ， “ 仙客来 ” 占 总数 的 (1/3) ， “ 仙客来 ” 比 “ 月季花 ” 多 多少 盆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8687", "content": "修路 队 两天 修 完 一段 公路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 (1/2) 千米 ． 这 段 公路 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "100", "content": "多少 / 7 = 23 … 3 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5093", "content": "李 大爷 把 女儿 寄 来 的 2000 元 钱 存入 银行 ， 存期 为 2 年 ， 年利率 为 4.68% ． 到期 时 李 大爷 能 拿到 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10554", "content": "合唱队 有 27 人 ， 围棋 班 的 人数 是 合唱队 的 (7/9) ， 围棋 班 又 是 篮球队 的 (3/4) ， 篮球队 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19082", "content": "(9/20) 与 一个 数 合 起来 是 (11/20) ， 这个 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12226", "content": "a 是 b 的 2 倍 ， b 是 c 的 3 倍 ， 则 a 是 c 的 多少倍 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17708", "content": "阳光 小学 安装 校园 网络 线路 ， 比 预算 的 投资 节约 了 5.1 万元 ， 正好 节约 了 20% ， 实际 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13099", "content": "一 辆 客车 从 甲地 到 乙地 ， 全程 650 千米 ， 它 的 速度 是 50 千米 / 时 ， 它 多少 时间 能 到达 乙地 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18079", "content": "六年级 有 学生 108 人 ， 相当于 全校学生 总数 的 15% ， 全校 有 学生 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "966", "content": "一 列 火车 每 小时 行驶 120 千米 ， 一辆 汽车 每 小时 行驶 的 速度 比 火车 速度 的 (3/5) 多 2 千米 ． 这辆 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1122", "content": "修 一条 路 ， 第一天 修 全长 的 (1/3) ， 第 二 天 修 全长 的 40% ， 还 剩 360 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12153", "content": "同学 们 去 植树 ， 一年级 栽 了 47 棵 ， 二年级 栽 了 54 棵 ， 三年级 栽 的 比 一 、 二年级 栽 的 总 棵 数 少 17 棵 ． 三年级 栽 了 多少 棵 树 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10428", "content": "果园 里 栽 了 780 棵 苹果树 ， 又 栽 了 5 行 梨树 ， 每行 12 棵 ． 苹果树 的 棵 树 是 梨树 的 多少倍 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3081", "content": "王老师 写 书 所得 稿费 5800 元 ， 按规定 ： 扣除 稿费 中 800 元 后 的 部分 按 20% 的 税率 缴纳 个人所得税 ， 那么 王老师 应 缴纳 个人所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16921", "content": "修 一条 4800 米 长 的 公路 ， 已经 修 了 2700 米 ， 剩下 的 要 21 天 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15975", "content": "食堂 李 阿姨 在 市场 买 了 5.5 千克 豆角 ， 交给 售货员 20 元 钱 ， 找回 4.6 元 ， 每千克 豆角 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22465", "content": "做 一个 无盖 的 长方体 铁皮 水桶 ， 底面 是 边长 为 4 分 米 的 正方形 ， 高 5 分 米 ， 做 这个 水桶 至少 需要 多少 平方分米 的 铁皮 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "9315", "content": "奥 斑马 和 小 美 分别 在 相距 111 千米 的 a 、 b 两城 ， 同 向 而 行 ． 已知 小 美 先行 3 小时 ， 奥 斑马 每 小时 行 35 千米 ， 小 美 每 小时 行 23 千米 ． 那么 ， 奥 斑马 出发 后 多少 小时 追 上 小 美 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16519", "content": "甲 、 乙 两袋 糖 的 质量 比 是 4 ： 1 ， 从 甲 袋中 取出 13 千克 糖 放入 乙 袋 ， 这时 两袋 糖 的 质量 比 是 7 ： 5 ． 求 两袋 糖 的 质量 之 和 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12418", "content": "一 个 机器厂 原 计划 每天 生产 40 台 机器 ， 20 天 可以 完成 任务 ． 如果 要 提前 4 天 完成 ， 每天 要 完成 多少 台 的 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14285", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 速度 是 80 千米 / 时 ， 15 小时 到达 ， 返回 时 用 了 12 小时 ， 求 返回 时 的 速度 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3622", "content": "小 明 原有 10 元 钱 ． 用 掉 (1/5) ． 还 剩 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13833", "content": "车上 原有 40 人 ， 下车 15 人 后 ， 又 上来 14 人 ， 现在 车上 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19657", "content": "工厂 食堂 用 去 原有 煤 的 40% 后 又 运 来 1200 千克 ， 这时 存 煤 量 恰好 是 原 存 煤 的 (2/3) ， 原有 煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21223", "content": "一 份 稿件 正好 有 4 页 ， 每页 25 行 ， 每行 28 个 字 ． 这份 稿件 一共 有 多少 字 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17692", "content": "一 只 圆柱体 水桶 ， 它 的 底面 内 半径 为 2 分 米 ， 桶 深 为 5 分 米 ， 现 将 盛 满 这 只 水桶 的 水 全部 倒 进 另一只 长方体 水箱 ， 倒 进 后 水箱 还 空 着 (1/3) ． 已知 长方体 水箱 内部 的 底 面积 是 15.7 平方分米 ， 这 只 水箱 的 内壁 高 多少 分 米 ？", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "1894", "content": "10.2 / 1.3 与 0.4 的 和 ， 商 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7816", "content": "把 一根 木料 锯 成 2 段 要 用 (1/6) 小时 ． 如果 把 它 锯 成 6 段 ， 要 几小时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21244", "content": "修 一条 公路 ， 已经 修 了 全长 的 (1/5) ． 如果 再 修 100 米 ， 已修 的 与 未 修 的 比 是 1 ： 3 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12303", "content": "包装 480 瓶 墨水 ， 一共 装 了 8 箱 ， 每箱 装 10 盒装 一箱 ． 每盒 装 多少 瓶 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21785", "content": "修 一条 长 5700 米 的 公路 ， 已经 修 了 一段 ， 还 剩下 900 米 没有 完成 ， 如果 按 每天 修 800 米 路 计算 ， 已修 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8436", "content": "李 芳 用 1 分钟 可以 做 45 道口 算题 ， 李强 的 速度 是 她 的 1.4 倍 ， 李强 每分钟 可以 做 多少 道口 算题 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6050", "content": "小 明 买 了 一支 钢笔 和 一支 圆珠笔 ， 钢笔 的 价钱 是 5 元 ， 圆珠笔 的 价钱 比 钢笔 便宜 (3/5) ， 圆珠笔 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9657", "content": "群星 学校 有 男 学生 1500 人 ， 占 全校 总 学生 人数 的 60% ， 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6823", "content": "国庆节 苏宁 电器 开展 优惠 大 酬宾 活动 ， 小 王 以 0.95 的 价格 购买 一台 原价 1800 元 的 洗衣机 ， 实际 比 原价 优惠 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20095", "content": "从 家 到 学校 有 2 千米 的 路程 ， 小 明 从 家 到 学校 ， 走 到 0.5 千米 时 ， 发现 数学 书 忘 在 家里 ， 立即 返回 家 拿 数学 书 ． 下午 正常 放学 回家 ， 小 明 今天 上学 到 放学 回家 共 走 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19839", "content": "大家乐 超市 这个 星期 卖出 4 箱 热水袋 ， 共 卖 了 360 元 ． 如果 每箱 有 6 个 热水袋 ， 平均 每个 热水袋 多少 元 钱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18363", "content": "计算 56 * （ 44 + 224 / 4 ） 时 ， 先 算 多少 ， 再 算 多少 ， 最后 的 结果 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11531", "content": "快车 和 慢车 同时 从 相距 620 千米 的 甲乙 两地 相对 开出 ， 快车 每 小时 行 68 千米 ， 慢车 每 小时 行 56 千米 ． 相遇 时 ， 快车 离 乙地 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8258", "content": "王师傅 计划 生产 500 个 零件 ， 实际 多 生产 了 100 个 ， 超产 百分之百 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9978", "content": "甲乙 两辆 汽车 同时 从 相距 630 千米 的 两地 相对 开出 ， 经过 4.2 小时 两车 相遇 ． 已知 乙 车 每 小时 行 70 千米 ， 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15721", "content": "学校 准备 去 商场 添置 课桌椅 ． 桌子 每张 65 元 ， 椅子 每 把 35 元 ． 现 需 添置 55 套 课桌椅 你 认为 至少 带 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20485", "content": "一 桶 油 的 (3/5) 是 45 千克 ， 这 桶 油 共 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11453", "content": "一 个数 的 (2/3) 比 56 少 4 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12870", "content": "小 华 的 年龄 加上 26 ， 减去 3 ， 乘以 4 ， 除以 5 是 24 ， 小 华 = 多少岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1624", "content": "用 一个 杯子 往 瓶子 里 倒水 ， 如果 倒 进 5 杯水 ， 连 瓶子 共 重 300 克 ； 如果 倒 进 7 杯水 ， 连 瓶子 共 重 440 克 ． 一杯 水 重 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10302", "content": "含盐 12% 的 盐水 6 千克 ， 加入 多少 千克 水 后 ， 使 盐水 含盐量 变为 5% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1954", "content": "大 货车 每 小时 行 35 千米 ， 面包车 的 速度 是 大 货车 的 1.2 倍 ， 小轿车 的 速度 是 面包车 速度 的 1.5 倍 ， 小轿车 每 小时 行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1318", "content": "4 、 五年级 同学 采集 树种 ， 五年级 采集 了 19.4 kg ， 比 四年级 少采 4.5 kg ， 两个 年级 一共 采集 了 多少 千克 树种 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18968", "content": "水果市场 进 了 3 车 苹果 ， 每 车 装有 58 箱 ， 如果 每箱 苹果 的 价格 是 13 元 ， 这些 苹果 共 值 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21107", "content": "一 棵 树 12 元 ， 如果 买 5 棵 送 1 棵 的话 ， 那么 每棵 便宜 了 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4877", "content": "图书馆 有 故事书 15.42 万册 ． 比 科技 书 少 5.8 万册 ， 科技 书 有 多少 万册 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6971", "content": "一 种 装 苹果 的 纸箱 ， 从 里面 量 长 45 cm ， 宽 32 cm ， 高 35 cm 每箱 装 120 个 苹果 ， 平均 每个 苹果 占 多少 立方厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14114", "content": "新兴 小学 新 购进 165 套 课桌椅 ， 每张 课桌 66 元 ， 每 把 椅子 34 元 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12986", "content": "有 36 朵 红花 ， 黄花 的 朵 数 是 红花 的 4 倍 ， 有 黄花 多少 朵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "659", "content": "果园 里 有 梨树 250 棵 ， 是 桃树 棵 树 的 (1/2) ． 橘树 的 棵 数 是 梨树 的 3 倍 ． 橘树 比 梨树 多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10899", "content": "小 华 从 家 到 学校 共 走 了 490.5 米 的 路 ， 如果 她 的 平均 步长 0.75 米 ， 从 家 到 学校 一共 走 了 多少 步 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18906", "content": "春风 饭馆 买来 西红柿 和 黄瓜 各 6 箱 ． 西红柿 每箱 15 千克 ， 黄瓜 每箱 18 千克 ． 西红柿 和 黄瓜 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1169", "content": "把 一块 棱 长 为 0.4 米 的 正方体 钢 块 锻造 成 横截面 面积 是 0.08 平方米 的 长方体 钢材 ， 则 钢材 有 多长 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14948", "content": "一 种 电脑 ， 现价 2800 元 ， 比 原来 降低 了 700 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10621", "content": "一 本 故事书 小 明 要 12 天 看 完 ， 前 5 天 看 了 120 页 ， 后 7 天 每天 看 了 30 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16580", "content": "在 一个 比例 中 ， 两个 外 项 互为 倒数 ， 其中 一个 内 项 是 (5/11) ， 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11190", "content": "一 列 火车 长 508 米 ， 比 42 辆 公共汽车 的 长度 总和 还 长 4 米 ， 一辆 公共汽车 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19083", "content": "春风 小学 六年级 有 4 个 班 ， 其中 6 （ 1 ） 班 有 48 人 ， 正好 相当于 全 级 人数 的 (6/25) ， 春风 小学 六年级 一共 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12174", "content": "小 红 有 64 张 纸 ． 做 纸花 用 去 27 张 ， 做 纸船 用 去 19 张 ． 小 红 还 剩 多少 张 纸 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14062", "content": "每千克 苹果 4.5 元 ， 买 了 2.57 千克 应该 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20983", "content": "一 瓶 2 升 的 葡萄汁 ， 喝 了 (3/5) 升 ， 还 剩 多少 升 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18880", "content": "一 个 足球 的 表面 是 由 32 块 黑色 5 边 形 和 白色 6 边 形 围成 的 ． 黑色 皮 和 白色 皮 的 块 数 的 比 是 3 ： 5 ， 黑色 皮 有 多少 块 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6568", "content": "一 根 钢筋 ， 截去 (7/8) 米 ， 还 剩 (4/5) 米 ， 这根 钢筋 的 全长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15007", "content": "一 个 平行四边形 面积 是 38 平方厘米 ， 底 是 9.5 厘米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4041", "content": "花店 运 来 216 朵 玫瑰花 ， 每 8 朵 扎 一束 ， 可以 扎成 多少 束 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10541", "content": "一 个 圆柱 的 体积 是 32 立方米 ， 底 面积 是 8 平方米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20565", "content": "公园 里 柳树 的 棵 数 是 松树 的 2 倍 少 49 棵 ， 松树 有 85 棵 ， 柳树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1637", "content": "甲 、 乙 两站 相距 640 千米 ， a 、 b 两车 同时 从 两站 相向 开出 ， 8 小时 后 相遇 ， a 车 的 速度 是 30 千米 / 时 ， b 车 的 速度 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "270", "content": "甲 、 乙 两地 相距 3200 米 ， 8 个人 轮流 推 着 几辆车 从 甲地 去 乙地 ， 平均 每人 推车 走 了 2000 米 ， 他们 共推 了 多少 辆车 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4585", "content": "某 厂 有 女职工 480 人 ， 女职工 人数 比 男 职工 少 (1/5) ． 这个 厂 有 男 职工 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17491", "content": "有 一筐 重 72 千克 的 苹果 ， 第一天 吃 了 它 的 (1/9) ， 第 二 天 吃 了 它 的 (5/9) ． 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20758", "content": "五年级 有 3 好 学生 20 人 ， 是 五年级 学生 总数 的 (2/9) ． 五年级 学生 人数 占 全校 人数 的 (1/5) ， 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3359", "content": "157 与 343 的 和 除以 25 与 2 的 积 ， 商 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22613", "content": "一 种 载重汽车 ， 它 的 轮胎 外 直径 是 1.76 米 ， 车轮 滚动 100 周 ， 汽车 行驶 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15179", "content": "一 本书 ． 如果 每页 排 600 个 字 ， 要 80 页 ． 现 决定 缩小 字号 ， 每页 多排 200 个 字 ． 现在 这 本书 有 多少 页 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9412", "content": "甲 数 是 328 ， 乙 数 是 8 ， 甲 数 是 乙 数 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10340", "content": "假期 小 严 准备 读 一些 课外书 ， 有 2 本 不同 的 科技 书 、 5 本 不同 的 世界名著 、 3 本 不同 的 人物传记 ， 小 严 要 从 3 类书 中 各 选 一本 阅读 ， 则 小 严 一共 有 多少 种 不同 的 选 法 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15259", "content": "学校 运 来 7.6 立方米 沙土 ， 把 这些 沙土 铺 在 一个 长 5 米 ， 宽 3.8 米 的 沙坑 里 ， 可以 铺 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6893", "content": "某 单位 机构 改革 后 有 工作人员 240 人 ， 比 原来 减少 了 60 人 ， 减少 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13658", "content": "运动会 开幕式 ， 160 名 同学 组成 了 2 个 花束 队 ， 每个 花束 队 4 行 ， 平均 每行 有 多少 名 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6511", "content": "学校 买 2 个 篮球 和 4 个 足球 一 共用 去 856 元 ， 篮球 一个 125 元 ， 足球 一个 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3992", "content": "小 红 和 小 芳 踢毽子 ， 小 红 踢 了 34 下 ， 比 小 芳 少 踢 6 下 ． 两 人 共 踢 多少 下 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15854", "content": "某 粮店 有 花生 3.62 万吨 ， 比 玉米 多 0.67 万吨 ． 粮店 共有 花生 和 玉米 多少 万吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20404", "content": "一 辆 货车 从 甲 城 到 乙 城 ， 每 小时 行驶 45 千米 ， 8 小时 到达 ． 返回 时 每 小时 行驶 60 千米 ， 需要 几小时 回到 甲 城 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2735", "content": "开开 商店 举行 促销 活动 ， 原价 126 元 一只 的 书包 ， 现价 只要 98 元 ， 便宜 了 多少 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18191", "content": "计划 每天 粉刷 3 间 ， 8 天 可以 完成 ， 实际 每天 粉刷 4 间 ． 实际 多少 天 可以 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17350", "content": "比 102 的 3 倍 少 175 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5346", "content": "林苑 公园 一个 长 80 米 ， 宽 40 米 的 长方形 草坪 中间 有 一个 小湖 ， 约 占 总面积 的 25% ， 小湖 周围 的 绿地面积 有 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3052", "content": "文具店 有 300 本 练习本 ， 卖出 一些 后 ， 还 剩 4 包 ， 每包 20 本 ， 卖出 多少 本 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "109", "content": "圆柱 的 体积 是 75 立方厘米 ， 高 是 15 厘米 ， 底 面积 = 多少 平方厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1499", "content": "修筑 一条 水渠 ， 4 天 已 筑 了 这 条 水渠 的 (8/15) ． 照 这样 计算 ， 筑 完 这 条 水渠 共 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19504", "content": "30 千克 油 用 去 (4/5) 千克 后 还 剩 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21758", "content": "2.7 与 4.5 的 和 除 144 的 商 再 加上 8.3 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12430", "content": "3 米 减少 它 的 (1/3) 后 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16510", "content": "小 明 做 一道 乘法 计算题 时 ， 把 其中 一个 因数 23 看成 了 32 ， 结果 得到 的 积 比 正确 的 积 多 2277 ． 请问 正确 的 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15520", "content": "甲 、 乙 两城 相距 750 千米 ． 一辆 汽车 以 每 小时 50 千米 的 速度 从 甲 城 开往 乙 城 ， 几小时 后 可以 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11599", "content": "两筐 苹果 重 40 千克 ， 从 甲 筐 取出 3 千克 放入 乙 筐 ， 则 甲 筐 比 乙 筐 还 多 2 千克 ． 原来 乙 筐 苹果 多少 千克 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "277", "content": "一 列 客车 和 一列 货车 同时 从 甲 、 乙 两个 城市 相对 开出 ， 客车 每 小时 行 120 km ， 货车 每 小时 行 90 km ， 经过 3.5 小时 两车 相遇 ． 甲 、 乙 两个 城市 间 的 铁路线 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11289", "content": "同学 们 去 天文台 参观 ， 上午 有 3 批 学生 去 参观 ， 每批 有 168 人 ， 下午 参观 的 学生 有 246 人 ． 这 一天 一共 有 多少 学生 去 参观 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14042", "content": "某 仓库 有 货物 126 吨 ， 已经 运 了 4 次 ， 平均 每次 运走 13.5 吨 ， 剩下 的 货物 要 3 次 运 完 ， 平均 每次 应运 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23155", "content": "星期日 ， 笑笑 向 他 的 爸爸 要 了 一些 钱 去 书城 买 书 ， 笑笑 用 去 80 元 ， 只是 用 去 他 爸爸 给 的 钱 的 (4/5) ， 笑笑 爸爸 给 了 多少 元 钱 让 笑笑 去 买 书 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9951", "content": "乘火车 从 甲地 到 乙地 ， 每 小时 行 120 千米 ， 6 小时 到达 ， 从 2007 年 元月 开始 将 每 小时 提速 到 180 千米 ， 提速 后 几小时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11327", "content": "超市 上午 运 来 毛巾 50 包 ， 下午 运 来 毛巾 60 包 ， 下午 比 上午 多 运 来 300 条 ， 每包 有 多少 条 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14808", "content": "菜市场 运 来 3 车 油菜 ， 每 车 装 1380 千克 ， 又 运 来 2613 千克 菠菜 ， 菜市场 一共 运 来 油菜 和 菠菜 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22914", "content": "甲 每分钟 行 80 米 ， 乙 每分钟 行 60 米 ． 两 人 同时 同 地 相 背 行 了 5 分钟 后 ， 甲 调转 方向 追赶 乙 ， 从 甲 开始 追 乙 到 甲 追 上 乙 需用 多少 分钟 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8616", "content": "一 个 钢铁厂 去 年产 钢 48 万吨 ， 今年 比 去年 增产 20% ， 今年 产 钢 多少 万吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "636", "content": "昆明 植物园 上午 来 了 游客 483 人 ， 中午 走 了 107 人 ， 下午 又 来 了 310 人 ， 这时 植物园 里 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21762", "content": "学校 要 为 图书馆 增添 两种 新书 ， 《 儿童 百科 》 每套 125 元 ， 《 数学 猜想 》 每套 18 元 ． 如果 每种 买 3 套 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16433", "content": "一 个 篮球 从 高空 自由 下落 ， 每次 接触 地面 弹起 的 高度 是 前 一次 下落 高度 的 (2/5) ， 如果 球 从 35 米 的 高处 落下 ， 第 二 次 弹起 的 高度 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14095", "content": "某 工厂 有 工人 726 人 ， 招工 后 人数 增加 了 (1/33) ， 这个 厂 现有 工人 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4380", "content": "15 的 80% 和 多少 的 (2/3) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17067", "content": "幼儿园 买 回 15 筐 苹果 ， 每 筐 约 重 23 千克 ． 如果 每千克 苹果 6 元 ， 买 这些 苹果 一共 要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12014", "content": "小 盈 今年 10 岁 ， 小 盈 的 年龄 是 爸爸 的 (2/7) ， 小 盈 的 爸爸 今年 多少岁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21376", "content": "学校 体操队 原有 女生 76 人 ， 男生 24 人 ， 后来 有 部分 女生 转 到 舞蹈队 ， 结果 男生 占 这时 体操队 的 37.5% ． 转 到 舞蹈队 的 女生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21915", "content": "小 李 、 小 华 比赛 爬楼梯 ， 小 李 跑 到 第 5 层 时 ， 小 华 正好 跑 到 第 3 层 ． 照 这样 计算 ， 小 李 跑 到 第 25 层 时 ， 小 华 跑 到 第 多少 层 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15725", "content": "一 架飞机 每 小时 飞行 860 千米 ， 比 一列 火车 每 小时 飞行 的 6 倍 还 多 20 千米 ． 这 列 火车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10181", "content": "食品 加工厂 上 半月 用 面粉 2.36 吨 ， 上 半月 比 下半月 多用 0.25 吨 ， 这个 加工厂 全 月 用 面粉 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6177", "content": "李 文 从 邮局 给 父母 汇款 3000 元 ， 按照 规定 汇费 是 汇款 的 1% ． 李 文 应付 汇费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11068", "content": "一 种 变速 自行车 ， 有 2 个 前 齿轮 ， 6 个 后 齿轮 ， 能 变 出 多少 种 速度 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "420", "content": "若干 同学 排成 一个 最 外层 每 边 10 人 共 4 层 的 中空 方阵 ， 那么 这 方阵 的 总 人数 = 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16491", "content": "一 种 商品 由于 热销 ， 因此 提价 20% ， 后 因 季节 改变 ， 只能 打 0.75 销售 ， 现在 售价 90 元 ， 这种 商品 原来 售价 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8866", "content": "放学 后 ， 陈 雅 莉 从 学校 回家 ， 妈妈 同时 从 家 到 学校 来 接 她 ． 陈 雅 莉 每分钟 走 60 米 ， 妈妈 每分钟 走 80 米 ， 她们 4 分钟 后 相遇 ， 陈 雅 莉 的 家 离 学校 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3999", "content": "一 桶 油 ， 连 桶 重 40 千克 ， 倒 出 油 的 (4/5) 后 ， 连 桶 还 重 12 千克 ， 桶 里 原来 有 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16939", "content": "一 辆 汽车 在 调整 公路 上 原先 每 小时 可以 行驶 100 千米 ， 需 耗油 6 升 ． 经过 技术 改进 ， 现在 的 速度 比 原来 提高 了 12% ， 而 每 小时 的 油耗 却 下降 了 10% ． 现在 这辆 汽车 在 高速公路 上 行驶 ， 每 小时 需 耗油 多少 升 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11912", "content": "学校食堂 原有 大米 3.2 吨 ， 第一周 用 去 了 总数 的 (1/4) ， 第 二 周 用 去 了 (7/10) 吨 ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2317", "content": "我们 班 72 人 参加 跳绳 比赛 平均 分成 6 个 组 ， 每个 组 平均 分成 4 个 队 ， 每个 队 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3586", "content": "明明 家 买 了 2.5 千克 苹果 ， 2.4 千克 草莓 ． 给 奶奶 拿 去 了 2 千克 草莓 ， 这时 明明 家 还有 多少 水果 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10152", "content": "一 套 衣服 现价 360 元 ， 比 原价 降低 了 了 (1/5) ． 这 套 西服 现价 比 原价 降低 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "527", "content": "小 华 有 邮票 80 张 ， 小 松 的 邮票 张 数 比 小 华 多 20% ， 小 松 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8200", "content": "袋中 有 15 个 红球 和 6 个 黄 球 ， 他们 的 形状 和 大小 一样 ， 至少 一次 摸 出 多少 个 球 就 能 确保 其中 有 10 个 球 是 一样 的 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5816", "content": "王明 看 一本 120 页 的 书 ， 前 4 天 平均 每天 看 15 页 ， 剩下 的 需 在 3 天 内 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7616", "content": "2007 年 7 月 ， 妈妈 的 月工资 薪金 所得 为 1860 元 ． 按 个人所得税法 规定 ， 每月 工资 薪金 所得 扣除 1600 元 后 ， 余额 不 超过 500 元 的 部分 按 5% 的 比例 缴纳 个人所得税 ． 妈妈 这个 月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15286", "content": "一 项 工程 ， 每天 完成 它 的 (1/10) ， 多少 天 完成 这项 工程 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7695", "content": "同学 们 做 广播操 ， 每行 站 15 人 ， 正好 站 8 行 ． 如果 每行 站 12 人 ， 能 站 几行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21395", "content": "培育 小学 二年级 有 学生 300 人 ， 它 的 (2/5) 正好 是 三年级 的 60% ． 三年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6183", "content": "工地 运 来 一批 水泥 ， 第一天 用 去 20% ， 第 二 天 用 去 3.2 吨 ， 还 剩 7.6 吨 ． 工地 运 来 水泥 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17828", "content": "一 本 科技 书 有 362 页 ， 我 平均 每天 看 多少 页 ？ 我 看 了 4 天 ， 还 剩 138 页 没 看 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6272", "content": "甲乙 两地 相距 340 千米 ， 客货 两辆 汽车 同时 从 两地 相对 开出 ， 4 小时 后 两车 相遇 ． 已知 客车 和 货车 的 速度 比 是 8 ： 9 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17225", "content": "小 华 读 一 本书 ， 每天 读 它 的 (1/4) ， 多少 天 读完 这 本书 的 (1/2) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6054", "content": "若 圆 的 直径 增加 1 厘米 ， 它 的 周长 增加 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10131", "content": "有 300 棵 树苗 ， 种植 在 5 块 花圃 中 ， 每块 花圃 中 3 行 ， 平均 每行 种 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12766", "content": "一 盒 钢笔 12 支 ， 每支 5 元 ， 36 盒 钢笔 装 一箱 ． 一箱 钢笔 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10535", "content": "货仓 有 540 袋 粮食 ， 先 用 一辆 微型车 运 ， 每 趟 装 15 袋 ， 运 了 12 趟 ， 剩下 的 用 一辆 大 货车 运 ， 每 趟 车 装 45 袋 ， 还要 运 几趟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8549", "content": "甲 数 是 50 ， 乙 数 比 甲 数多 30 ， 甲 数 是 乙 数 的 多少 （ 填写 分数 ） ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21699", "content": "兴华 村 修 一条 水渠 ， 每天 修 45 米 ， 已经 修 了 28 天 ， 还要 修 420 米 ， 水渠 全长 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1086", "content": "王 叔叔 从 县城 出发 去 王 庄 送 化肥 ． 去 时 按照 每 小时 40 千米 的 速度 用 了 3 小时 ， 返回 时 用 了 2 小时 ； 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4478", "content": "某班 出席 48 人 ， 出勤率 是 96% ， 有 多少 个人 没 来 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11271", "content": "一 列 火车 提速 前 每 小时 行驶 48 千米 ， 是 提速 后 速度 的 (2/3) ， 提速 后 每 小时 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10942", "content": "多少 千米 的 25% 是 80 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9998", "content": "春 林 小学 开展 植树 活动 ， 其中 40% 是 六年级 植 的 ， 15% 是 五年级 植 的 ， 两个 年级 一共 植树 220 棵 ． 这次 植树 活动 春 林 小学 一共 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19174", "content": "一 个 长方体 沙坑 ， 长 4 米 ， 宽 2 米 ， 深 0.5 米 ， 如果 每 立方米 黄沙 重 1.4 吨 ， 这 黄沙 重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "1200", "content": "少年宫 美术组 有 45 名 同学 ， 3 个 月 共 创造 810 幅 画 ， 平均 每人 每月 创造 多少 幅 画 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21879", "content": "王 叔叔 行 一段 4 km 的 路 用 了 (2/3) h ， 他 每 小时 行 多少 km ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13841", "content": "某市 手机 通话 的 话费 标准 是 ： 每月 基本 月租费 25 元 ， 每分钟 接听 或 打出 的 通话费 都 是 0.40 元 ． 计费 方式 是 ： 每月 话费 总额 = 基本 月租费 + 通话费 ． 今年 4 月份 ， 该市 的 李 叔叔 用 手机 接听 80 分钟 ， 打出 120 分钟 ， 李 叔叔 这个 月 要 付出 多少 元 的 话费 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6118", "content": "有 一片 边长 是 10 米 的 正方形 阔叶林 ， 如果 每 1 平方米 阔叶林 每天 能 制造 氧气 75 克 ， 这 片 阔叶林 每天 能 制造 氧气 多少 克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "963", "content": "运动会 上 4 年 （ 2 ） 班 48 名 运动员 出场 时 ， 排成 4 列 纵队 ， 前后 相邻 两 人 间隔 为 1 米 ， 每 列 队伍 长 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10104", "content": "建设 一座 研究所 ， 实际 投资 36 万元 ， 比 原 计划 节省 了 4 万元 ， 节省 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5150", "content": "冰 化成 水 后 ， 体积 比 原来 减少 (1/12) ， 一块 冰 融化 成 水 后 的 体积 为 440 立方厘米 ． 这 块冰 的 体积 = 多少 立方厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13879", "content": "果园 里 有 桃树 153 棵 ， 苹果树 是 桃树 的 3 倍 ． 苹果树 和 桃树 一共 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11049", "content": "饲养场 养 了 公鸡 28 只 ， 养 的 母鸡 只 数 比 公鸡 的 3 倍 多 9 只 ， 饲养场 养 的 母鸡 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15643", "content": "建筑 公司 远 一批 砖 ， 下午 运走 了 1200 块 ， 上午 运走 的 是 下午 的 (3/4) ． 全天 远走 多少 块 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17651", "content": "环球 旅行社 组织 9 寨 沟 5 日 游 ， 上午 有 360 人 名 ， 下午 有 240 人 报名 ． 如果 每 60 人 乘座 一辆车 ， 这次 一共 需要 旅行车 多少 辆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4861", "content": "如果 把 一根 木料 锯 成 4 段 要 4.5 分钟 ， 那么 用 同样 的 速度 把 这根 木料 锯 成 8 段 ， 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8844", "content": "工人 修 一条 水渠 ， 原 计划 每天 修 0.24 千米 ， 实际 每天 比 原来 多 修 0.06 千米 ， 原 计划 10 天 修 完 的 工程 ， 实际 用 了 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19553", "content": "(1/2) + (1/3) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14040", "content": "一 次 数学 测验 ， 某 小组 共 8 人 ， 他们 的 平均 成绩 是 82.5 分 ． 考卷 发 下 后 ， 小组长 李 丽 发现 老师 批 错 一 题 ， 这样 李 丽 的 成绩 下降 了 4 分 ， 现在 全 小组 平均分 = 多少 分 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21562", "content": "一 次 数学考试 后 ， 李 军 问 于 昆 数学考试 得 多少 分 ． 于 昆 说 ： “ 用 我 得 的 分数 减去 8 + 10 ， 再 除以 7 ， 最后 乘以 4 ， 得 56 ． ” 于 昆 的 数学考试 得分 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1152", "content": "学校 开展 为 灾区 捐赠 图书 活动 ， 五年级 捐赠 165 本 ， 六年级 比 五年级 多 捐赠 了 (2/11) ． 六年级 捐赠 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13811", "content": "在 4 个 城市 之间 ， 都 有 直达 的 航空线 ， 一共 有 多少 条 航空线 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "302", "content": "王老师 编写 的 《 学 与 玩 》 出版 后 ， 今年 5 月 取得 稿费 2400 元 ． 稿费 收入 扣除 1600 元 后 按 14% 的 税率 缴 个人所得税 ， 王老师 实际 得到 稿费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3311", "content": "某 地区 去年 降水量 是 427 毫米 ， 比 前年 减少 (2/9) ， 这个 地区 前年 降水量 = 多少 毫米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20877", "content": "李 明 看 一本 故事书 ， 5 天 看 了 115 页 ． 照 这样 的 速度 ， 剩下 的 207 页 ， 还要 多少 天 才能 看 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12002", "content": "一 尊 金 佛 全部 浸没 在 长 6 分 米 ， 宽 4 分 米 装有 水 的 长方体 容器 里 ， 测 得 水面 上升 5 分 米 ， 这 尊 金 佛 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20965", "content": "运输队 运 一批 货 ， 运走 的 吨数 是 总 吨数 的 (1/5) ， 没有 运 的 比 运走 的 多 12 吨 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2797", "content": "在 一个 长 50 厘米 ， 宽 40 厘米 ， 高 30 厘米 的 玻璃 鱼缸 里 放入 一块 石头 ， 石头 沉入 水底 ． 结果 水面 上升 了 3.5 厘米 ． 这块 石头 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2457", "content": "一 年 定期存款 的 年利率 是 2.25% ， 章 叔叔 将 30000 元 存入 银行 ， 定期 一年 ． （ 国家 规定 免交 利息税 ） ， 到期 时 ， 章 叔叔 可 获得 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13789", "content": "新华 粮仓 有 344 袋 面粉 ， 要 分 4 次 运 完 ， 平均 每次 运 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2577", "content": "商店 运 来 4 箱 乒乓球 ， 总价值 240 元 ． 如果 每个 乒乓球 2.5 元 ， 那么 每箱 有 几个 乒乓球 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1623", "content": "小朋友 带 10 元 钱 去 买 文具 ， 每支 铅笔 1.2 元 ， 每 本 练习本 0.7 元 ， 每张 彩纸 0.2 元 ， 小朋友 买 了 5 支 铅笔 ， 剩下 的 钱 买 彩纸 ， 还 可以 买 几张 彩纸 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3551", "content": "我家 买 了 5000 元 国家 建设 债券 ， 定期 5 年 ， 如果 年利率 是 3.14% ， 到期 时 ， 我家 可 得到 本金 和 利息 一共 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "741", "content": "修 一条 1500 米 长 的 路 ， 第一周 完成 了 全 工程 的 (5/17) ， 第 二 周 完成 了 全 工程 的 (3/11) ， 再 修 全 工程 的 几分 之 几 就 完成 了 全部 任务 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22909", "content": "一 个 圆 的 半径 是 2 厘米 ， 它 的 周长 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7576", "content": "1 + (1/2) + (1/4) + (1/8) + (1/16) + (1/32) + (1/64) + (1/128) + (1/256) = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "3261", "content": "要 挖 一个 长 60 米 ， 宽 40 米 ， 深 3 米 的 游泳池 ， 共 需 挖出 多少 立方米 的 土 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14296", "content": "蒋 师傅 生产 一批 零件 ， 前 3 天 生产 零件 126 件 ， 照 这样 计算 ， 再生产 12 天 完成 生产 任务 ． 这 批 零件 共有 多少 件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4809", "content": "商店 进 了 150 个 中国 结 ， 卖 了 2 天 还 剩 12 个 ， 平均 每天 大约 卖 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20057", "content": "男生 人数 是 24 人 ， 比 女生 人数 多 20% ， 男 、 女生 共有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "618", "content": "6 一班 有 女生 20 人 ， 相当于 男生 的 80% ， 男生 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2696", "content": "某校 3 、 4 、 五年级 学生 参加 作文 竞赛 ， 三年级 有 8 人 参加 ， 占 总 人数 的 (1/6) ， 四年级 参加 的 人数 占 总 人数 的 (1/3) ， 五年级 有 多少 人 参加 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10645", "content": "我们 学校 的 运动场 跑道 一圈 是 250 米 ， 那么 4 圈 就 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8299", "content": "亮 亮 参加 书法 比赛 得奖 了 ， 他 和 其他 获奖 的 每个 小朋友 都 合 了 一次 影 ， 他 一共 合 了 3 次 影 ． 一共 有 几个 小朋友 获奖 了 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1943", "content": "甲 数 比 乙 数 的 75% 少 3 ， 甲 数 是 24 ， 求 乙 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12653", "content": "一 辆 客车 从 甲 城 到 乙 城 ， 每 小时 行 4.5 千米 ， 2.6 小时 到达 ． 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15523", "content": "商店 运 来 一些 水果 ． 苹果 有 20 筐 ， 梨 的 筐 数 是 苹果 的 (3/4) ， 同时 又 是 桔子 的 (3/5) ． 桔子 有 多少 筐 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23044", "content": "用 1200 千克 出粉率 为 85% 的 小麦 ， 能 磨 出 面粉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21297", "content": "六年级 学生 参加 植树 劳动 ， 男生 植 了 160 棵 ， 男生 植 的 是 女生 的 80% ． 女生 植 了 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22034", "content": "小 华 的 零用钱 比 小 红 多 5.6 元 ， 小 红 比 小 明 少 1.2 元 ． 小 华 比 小 明 多 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18245", "content": "实验 小学 的 学生 ， 五年级 比 四年级 多 15% ， 四年级 比 三年级 多 25% ， 而 五年级 学生 比 三年级 多 182 人 ， 三年级 有 学生 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14261", "content": "修路 队 要 修 一条 路 ， 已修 了 全长 的 (3/8) ， 还 剩 750 米 未 修 ， 这 段 公路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3309", "content": "一 只 船 每 小时 行驶 13.5 千米 ， 32 小时 到达 目的地 ， 如果 每 小时 行驶 16 千米 ， 需要 多长时间 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20855", "content": "甲乙 两个 工程队 分别 从 两端 同时 开凿 隧道 ， 甲队 每天 开凿 17 米 ， 乙 队 每天 开凿 83 米 ， 120 天 后 开凿 完 ． 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17737", "content": "有 一批 布 做 儿童服装 ， 每套 用布 1.5 米 ， 可 做 300 套 ． 如果 改 做成 人 服装 ， 每套 用布 2.5 米 ， 可以 做 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19304", "content": "修 一条 公路 ， 计划 每天 修 200 米 15 天 可以 修 完 ； 实际 只 修 了 12 天 就 完工 了 ， 实际 每天 修 了 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22973", "content": "聪聪 的 体重 是 40 千克 ， 亮亮的 体重 比 聪聪 重 (1/20) ， 亮亮的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22707", "content": "甲 、 乙 两车 分别 同时 从 a 、 b 两站 相对 开出 ， 第一次 相遇 后 两车 继续 行驶 ， 到达 a 、 b 两站 后 立即 返回 ， 第 二 次 相遇 离 b 站 的 距离 是 a 、 b 两站 距离 的 20% ， 已知 乙 车 共 行 了 540 千米 ， a 、 b 两站 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11802", "content": "小 华 家 距 学校 240 千米 ， 如果 乘 小汽车 去 学校 ， 3 小时 可以 到 过 ， 小汽车 的 速度 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20794", "content": "一 头 非洲 大象 体重 5000 千克 ， 是 一只 绵羊 体重 的 125 倍 ， 一只 绵羊 的 体重 又 是 一只 小狗 体重 的 8 倍 ， 一只 小狗 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5897", "content": "食堂 买来 78 千克 洋白菜 ， 吃 去 20 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22456", "content": "一 个 平行四边形 面积 60 平方厘米 ， 底 10 厘米 ， 高 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20422", "content": "5 （ 1 ） 班 有 班费 36.8 元 ， 同学 们 在 图书 义卖 活动 中 又 筹集 到 53.2 元 ． 用 这些 钱 正好 可以 买 3 个 足球 ， 每个 足球 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1588", "content": "一 种 树苗 经 试种 成活率 是 90% ， 为了 保证 种 活 900 棵 ， 至少 应 栽种 多少 棵 树苗 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18827", "content": "一 辆 汽车 从 甲地 开 到 乙地 ， 每 小时 行 40 千米 ， 已经 行 了 4.5 小时 ， 已 行 的 路程 与 未 行 的 路程 比 是 3 ： 7 ， 剩下 的 路程 还 需要 几小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "6628", "content": "一 批 零件 甲 、 乙 两 人 合 做 每天 可以 加工 120 个 ， 现 由 甲 先 加工 8 天 ， 剩下 的 由 乙 再 加工 5 天 就 完成 了 任务 ， 已知 这 批 零件 共有 765 个 ， 乙 每天 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "209", "content": "工程队 修 一条 观赏 步 道 ， 第一周 完成 了 全长 的 30% ， 第 二 周 完成 了 全长 的 45% ． 两周 共 修 150 米 ， 这 条 步 道 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14232", "content": "计算 ： 1995 + 199.5 + 19.95 + 1.995 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5489", "content": "今年 7 月 13 日 泥石流 冲毁 甲 商店 大米 38 袋 ， 每 袋 大米 售价 125 元 ， 乙 商店 被 冲毁 同样 的 大米 42 袋 ， 甲乙 两个 商店 被 冲毁 的 大米 一共 值 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7651", "content": "仓库 有 一批 化肥 ， 运出 (2/5) 后 ， 又 运进 30 吨 ， 这时 仓库 里 的 化肥 比 原来 还 多 8 吨 ， 仓库 原有 化肥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2126", "content": "冬冬 家 买来 一袋 面粉 ， 吃 了 5 千克 ， 正好 是 这 袋 面粉 的 (5/8) ， 这 袋 面粉 还 剩 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14269", "content": "四年级 的 同学 参加 课外 兴趣小组 活动 ， 参加 书法 兴趣班 的 小组 占 全年 级 人数 的 (3/10) ， 参加 舞蹈 小组 的 人数 占 全年 级 的 (2/10) ， 有 (1/10) 的 同学 参加 体育 兴趣小组 ． 这 3 个 小组 的 人数 占 全年 级 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8827", "content": "同学 们 做操 ， 每行 站 20 人 ， 正好 站 18 行 ． 如果 每行 站 24 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9131", "content": "把 一个 西瓜 的 (3/4) 平均 分给 6 个 同学 ， 每个 同学 分 得 这个 西瓜 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11160", "content": "甲 数 是 (7/8) ， 与 乙 数 的 和 是 1 ， 甲 、 乙 两 数 差 的 倒数 = ？ （ 列 综合 算式 解答 ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14782", "content": "一 个数 的 75% 是 150 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22134", "content": "河西 小学 有 3600 名 学生 ， 正好 是 向阳 小学 人数 的 2 倍 ． 向阳 小学 有 (1/6) 的 同学 参加 了 学校 组织 的 “ 金秋 艺术节 ” ． 参加 艺术节 的 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11809", "content": "停车场 有 24 辆 公共汽车 ， 公共汽车 的 辆数 比 小汽车 少 (1/7) ， 小汽车 有 多少 辆 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5", "content": "小 刚 的 体重 是 28.4 千克 ， 小强 的 体重 是 小 刚 的 1.4 倍 ， 小强 的 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18373", "content": "(4/5) 与 (5/8) 的 和 乘 它们 的 差 ， 结果 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7349", "content": "老王 从 家 去 火车站 乘车 ， 若 每 小时 行 4 千米 ， 则 要 迟到 2 小时 ； 若 每 小时 行 6 千米 ， 则 可 提前 1 小时 到达 ． 求 老 王家 到 火车站 的 距离 = 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "7149", "content": "一 个 盒子 里 有 白 球 、 红球 共 18 个 ， 它们 除 颜色 外 完全相同 ， 从 盒子 中 任意 摸 出 一个 球 ， 摸 到 白 球 的 可能性 为 (2/3) ， 那么 红球 一共 有 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10643", "content": "小 军 爷爷 的 体重 是 50 千克 ， 小 军 比 爷爷 轻 (1/5) ， 爸爸 比 小 军 重 (5/8) ． 爸爸 有 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20546", "content": "今年 的 粮食产量 比 去年 增加 上 (1/9) ， 今年 的 粮食产量 是 去年 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8191", "content": "水果店 运 来 苹果 28 箱 ， 香蕉 35 箱 ， 每箱 都 重 15 千克 ， 水果店 共运 来 多少 千克 水果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9932", "content": "哥哥 有 28 张 邮票 ， 比 弟弟 邮票 张 数 的 1.5 倍 少 2 张 ， 他们 两 人 一共 有 多少 张 邮票 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "269", "content": "妈妈 买 苹果 和 梨 共 花 了 17.4 元 ， 梨 每千克 1.8 元 ， 苹果 每千克 2.4 元 ， 买 了 3 千克 梨 ， 问 买 了 多少 千克 苹果 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10571", "content": "6 筐 苹果 的 钱 等于 8 筐 梨 的 钱 ， 一筐 苹果 4 元 ， 一筐 梨 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8440", "content": "六年级 有 120 人 达到 《 国家 体育锻炼 标准 》 （ 儿童组 ） ， 达标率 是 75% ， 六年级 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18792", "content": "王师傅 6 天 完成 计划 的 (3/7) ， 按 这样 的 效率 ， 完成 任务 要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6760", "content": "一 袋 米 重 600 千克 ， 第一周 吃 了 40% ， 第 二 周 吃 了 (1/5) ， 两周 一共 吃 了 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3979", "content": "从 甲 城 到 乙 城 全程 882 千米 ， 一列 火车 的 速度 为 98 千米 / 时 ， 从 甲 城 到 乙 城 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20194", "content": "一 个数 的 (3/4) 是 (9/20) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6855", "content": "李 华 家 春季 每月 用电 120 千瓦时 ， 预计 夏季 每月 的 用电量 比 春季 多 (4/5) ， 预计 夏季 每月 用电 多少 千瓦时 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22270", "content": "学校 买来 3 箱 图书 ， 每箱 120 本 ， 平均 分给 6 个 年级 ， 平均 每个 年级 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17342", "content": "有 一根 木料 用 (3/4) 小时 截 成 4 段 ， 如果 每 段 所用 时间 都 相同 ， 那么 截 成 8 段 共 需 多少 小时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20064", "content": "2100 / 42 ， 再 加上 47 ， 结果 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3938", "content": "一 件 上衣 售价 400 元 ， 售出 后 可 得 (1/4) 的 利润 ． 这件 上衣 的 进价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4593", "content": "一 辆 自行车 原价 250 元 ， 在 端午节 促销 活动 中 0.8 优惠 出售 ， 小 明 有 贵宾卡 ， 还 可以 再 打 0.9 ， 小 明 买 这辆 车 实际 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9550", "content": "统计局 统计 了 664 座 城市 ， 按 空气污染 情况 可 分为 3 类 ： 良好 ， 轻度 污染 和 严重 污染 ． 其中 ， 空气质量 良好 的 城市 数 比 严重 污染 城市 数 的 3 倍 多 52 座 ， 轻度 污染 城市 数 是 严重 污染 城市 数 的 2 倍 ． 则 空气 严重 污染 城市 有 多少 座 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9923", "content": "甲 数 除以 乙 数 的 商 是 1.5 ， 如果 甲 数 增加 20 ， 则 甲 数 是 乙 数 的 2 倍 ． 原来 甲 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1945", "content": "一 种 电脑 原价 12500 元 ， 现价 8500 元 ， 现价 比 原价 便宜 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18009", "content": "圆 湖 周长 1080 米 ， 在 湖边 每隔 12 米 种植 柳树 一株 ， 再 在 两株 柳树 之间 等 距离 种植 3 棵 桃树 ， 这样 可 种 柳树 和 桃树 共 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5577", "content": "某 个体户 按 批发价 买进 一批 皮球 ， 成本价 每个 0.15 元 ， 零售价 每个 0.25 元 ， 当 他 卖 到 只 剩 20 个 皮球 时 ， 计算 卖 得 得 钱 除去 全部 成本 外 获利 10 元 ， 这 个体户 共 买进 皮球 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20681", "content": "一 种 衣服 原价 240 元 ， 现价 比 原价 降低 了 (1/4) ， 问 现在 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4733", "content": "把 一个 数 扩大 100 倍 后 得到 的 新 数 比 原 数多 396 ， 原 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3256", "content": "3 个人 跳绳 ， 一共 跳 了 360 下 ， 小 红 跳 了 130 下 ， 小 莉 跳 了 146 下 ， 小 文 跳 了 多少 下 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22447", "content": "已经 看 了 一 本书 的 (2/5) ， 正好 是 80 页 ． 这 本书 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7600", "content": "一 些 大米 ， 每天 吃 50 千克 ， 7 天 刚 好吃 完 ， 如果 每天 吃 35 千克 ， 够吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8306", "content": "妈妈 把 1000 元 钱 存入 银行 ， 整存整取 3 年 ， 年利率 是 3.33% ， 到期 时 妈妈 可以 取回 本金 和 利息 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "241", "content": "10 元 钱 能 买 苹果 3 千克 ， 12 元 钱 能 买 苹果 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16575", "content": "某 小学 准备 绿化 校园 ， 植 杨树 棵 数 是 植 广玉兰 棵 数 的 (4/5) ， 植 广玉兰 的 棵 数 是 植 垂柳 棵 数 的 (1/3) ， 植 杨树 16 棵 ， 问 值 垂柳 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13804", "content": "用 一只 杯子 盛 满 水 向 一个 水壶 里 灌水 ， 倒 进 3 杯水 后 ， 连 水壶 共 重 0.85 千克 ； 如果 灌满 水壶 要 倒 进 5 杯水 ， 这时 连 水壶 共 重 1.25 千克 ． 每 杯水 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20008", "content": "一 千克 大米 售价 3.1 元 ， 一 千克 黄豆 售价 4.6 元 ， 妈妈 买 大米 、 黄豆 各 20 千克 ， 应付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5646", "content": "山田 奶牛 厂 每天 能 向 市场供应 牛奶 300 箱 、 高 钙奶 260 箱 ， 一辆 卡车 一次 能 运 40 箱 ， 这辆 卡车 要 运 多少 次 才能 把 这些 牛奶 全部 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20632", "content": "商店 运 来 120 台 vcd ， 每 台 售价 440 元 ， 每 售出 一台 可 得到 售价 15% 的 利润 ， 这 批 vcd 售完 后 可 得 利润 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4647", "content": "16 * (2/3) * ( 9 * (1/8) ) =", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "17751", "content": "6 一班 同学 共 植树 288 棵 ， 女生 植 了 (1/4) ， 其余 全 是 男生 植 的 ， 男生 比 女生 多 植 多少 棵 树 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12192", "content": "除数 是 9 ， 商 是 15 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16704", "content": "15 米 增加 它 的 (1/5) 后 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18606", "content": "星光 奶业 生产 新鲜 酸奶 ， 每天 生产 12000 瓶 ， 每 24 瓶装 一盒 ， 每 20 盒装 一箱 ． 这 一天 生产 的 酸奶 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13751", "content": "9 * 644 与 256 的 差 ， 得数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21078", "content": "三年级 同学 3 小时 共 植树 9 排 ， 每排 24 棵 ． 三年级 同学 每 小时 植树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17820", "content": "某县 修建 移民 新村 安置 672 户 3 峡 移民 ， 如果 每 幢 楼 修 4 个 单元 ， 每个 单元 住 12 户 ， 一共 要 盖 多少 幢 这样 的 楼房 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5574", "content": "我们 班 有 68 人 ， 参加 体育 队 的 有 43 人 ， 参加 舞蹈队 的 有 38 人 ， 每人 至少 参加 一 个 队 ， 那么 这个 班 两队 都 参加 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16052", "content": "小 红 把 1000 元 压岁钱 存入 银行 ， 定期 3 年 ， 年利率 是 3% ， 他 到期 时 从 银行 里 拿到 税后 利息 多少 元 ？ （ 利息税 5% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "11362", "content": "大成 实验学校 四年级 有 3 个 班 ， 每个 班 42 人 ， 五年级 有 2 个 班 ， 每个 班 43 人 ， 四年级 比 五年级 多 多少 学生 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7994", "content": "妈妈 到 糖果店 买 了 6 袋 花生 和 3 盒 巧克力 ， 已知 每 袋 花生 3.24 元 ， 每盒 巧克力 21.7 元 ， 妈妈 共 付 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3187", "content": "一 间 制衣厂 原来 做一套 衣服 要 3.8 米 布 ， 后来 改进 了 裁剪 方法 ， 每套 节约 0.2 米 布 ， 原来 准备 做 360 套 衣服 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7505", "content": "读 一本 科技 书 ， 每天 读 它 的 (1/6) ， 多少 天 可以 读完 这 本书 的 (1/2) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2517", "content": "一 个 林场 要 栽树 2000 棵 ， 前 3 天 平均 每天 栽 350 棵 ． 其余 的 要求 2 天 栽 完 ， 平均 每天 要 栽 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16506", "content": "计算 ： 76.23 * 5104.98 - 396.5 * 510.498 + 51049.8 * 6.342 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "12309", "content": "一 列 火车 3 小时 行 318 千米 ， 一辆 汽车 5 小时 行 265 千米 ． 火车 的 速度 是 汽车 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22486", "content": "师徒 二 人 同时 各 加工 144 个 布娃娃 ， 师傅 每 小时 可以 加工 18 个 ， 徒弟 每 小时 加工 16 个 ． 当 两 人 都 完成 时 ， 徒弟 比 师傅 多用 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1467", "content": "在 一次 学校 组织 的 数学考试 中 ， 6 （ 2 ） 班 40 名 学生 中 有 21 名 男同学 的 平均 成绩 是 82 分 ， 19 名 女同学 的 平均 成绩 是 87 分 ． 全体同学 的 平均 成绩 = 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2817", "content": "42 与 24 的 和 乘以 它们 的 差 的 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8270", "content": "如果 希望 小学 五年级 有 215 人 ， 占 全校 总 人数 的 (1/5) ， 那么 全校 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5620", "content": "甲 数 除以 乙 数 ， 商 是 6 ． 若 甲 数 是 306 ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10674", "content": "一 个 服装厂 接到 生产 一批 西服 的 定单 ． 平均 每天 生产 60 套 ， 5 天 后 还 剩下 350 套 没有 完成 ． 这 批 西服 一共 有 多少 套 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2767", "content": "(5/9) 与 (1/3) 的 和 再 减去 它们 的 差 ， 结果 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4866", "content": "小 红 体重 42 千克 ， 比 小 明 重 12 千克 ， 大 立 的 体重 是 小 明 的 2 倍 ． 大 立 重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20991", "content": "客车 与 货车 分别 从 相距 335 千米 的 两站 同时 相向 开出 ， 2.5 小时 在 途中 相遇 ． 已知 客车 每 小时 行驶 60 千米 ， 货车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7966", "content": "小 明 坐在 火车 的 窗口 位置 ， 火车 从 大桥 的 南端 驶向 北端 ， 小 明 测 得 共用 时 35 秒 ． 爸爸 问 小 明 这 座 桥 有 多长 ， 于是 小 明 马上 从 铁路 旁 的 某 一根 电线杆 计时 到 第 10 根 电线杆 用 时 25 秒 ． 如果 路旁 每 两根 电线杆 的 间隔 为 50 米 ， 小 明 就 可 算 出 了 大桥 的 长度 为 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "23140", "content": "体育 室 有 45 只 球 ， 第一次 借 走 9 只 ， 第 二 次 借 走 10 只 ， 体育 室 的 球 缺少 了 多少 只 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11414", "content": "某 商场 每月 的 营业额 是 400 万元 ， 如果 按 营业额 的 5% 缴纳 营业税 ， 该 商场 每月 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3045", "content": "家具厂 要 做 一批 桌子 ， 每天 可以 做 26 张 ， 做 了 25 天 ， 还有 84 张 没有 做 ． 这 批 桌子 一共 有 多少 张 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14680", "content": "光明 玻璃厂 生产 了 4920 个 玻璃杯 ， 如果 每箱 装 8 盒 ， 每盒 装 15 个 杯子 ． 一共 需要 多少 个 箱子 才能 装完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4781", "content": "有 9 筐 苹果 ， 如果 从 每 筐 里 取出 12 千克 苹果 ， 那么 剩下 苹果 的 重量 相当于 原来 3 筐 苹果 的 重量 ｡ 原来 每 筐 苹果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7181", "content": "从 24 里 连续 减去 6 ， 最 多 减 多少 次 结果 等于 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7775", "content": "电脑公司 5 月份 计划 组装 1200 台 电脑 ， 实际 完成 1500 台 ， 这个 月 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15964", "content": "从 978 里 减去 126 的 5 倍 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1310", "content": "水果店 运 来 6 筐 苹果 和 5 筐 梨 ， 苹果 每 筐 重 35 千克 ， 梨 每 筐 重 24 千克 ， 水果店 运 来 苹果 和 梨 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7622", "content": "有 100 位 旅客 ， 其中 有 10 人 既 不 懂 英语 ， 又 不 懂 俄语 ， 有 75 人 懂 英语 ， 83 人 懂 俄语 ， 懂 英语 又 懂 俄语 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4835", "content": "一 种 商品 现在 48 元 ， 比 原来 降低 了 (1/5) ， 这件 的 商品 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3558", "content": "一 个 车间 要 生产 75 台 机器 ， 前 5 天 生产 25 台 ， 剩下 的 还要 生产 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1071", "content": "请 你 计算 ： 1 + 2 + 3 + … + 2006 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3430", "content": "某 商店 为了 谋取 暴利 ， 现 将 商品 按 80% 的 利润 定价 ， 然后 再 广告 中 写道 ： “ 大 酬宾 ， 0.8 优惠 ． ” 照 这样 的 做法 ， 一台 进价 是 3500 元 的 彩电 该 商店 赚 了 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17436", "content": "8 本书 摞 起来 高 168 毫米 ， 多少 本书 摞 起来 高 231 毫米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3756", "content": "一 种 录音机 ， 降价 (1/10) 后 是 630 元 ， 这种 录音机 原价 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7946", "content": "小 莉 家种 了 15 棵 芒果树 ， 荔枝树 的 棵 数 是 芒果树 的 (2/3) ， 又 是 龙眼树 的 (2/7) ． 小 莉 家 有 多少 棵 龙眼树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7650", "content": "小 红 有 2 顶 不同 的 帽子 ， 3 件 不同 的 上衣 ， 她 一共 有 多少 种 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15404", "content": "商店 购进 苹果 、 梨 共 54 千克 ， 苹果 占 (2/9) ． 后来 又 买进 一些 苹果 ， 这时 苹果 占 两种 水果 总重量 的 40% ， 后来 买进 的 苹果 = 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17264", "content": "10 月 1 日 上午 西游 洞 有 游客 985 人 ， 中午 有 545 人 离去 ， 下午 又 来 了 230 人 ， 此时 西游 洞 还有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12926", "content": "有 红 金鱼 380 条 ， 花 金鱼 的 条数 是 红 金鱼 的 3 倍 ， 求 花 金鱼 比 红 金鱼 多 多少 条 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15424", "content": "甲 、 乙 二 人 同时 从 相距 360 千米 的 两地 相向 而 行 ， 7.2 小时 后 相遇 ， 甲 的 速度 是 乙 的 3 倍 ， 乙 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15862", "content": "民 威 商场 原有 电视机 150 台 ， 国庆节 前夕 卖出 30 台 ， 国庆节 期间 又 卖出 余下 的 (3/5) ， 节后 又 新 进 现有 电视 的 (3/4) ， 民 威 商场 现有 电视 多少 台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16992", "content": "箱子 里 有 红球 13 个 ， 黄 球 10 个 ， 蓝球 15 个 ， 从中 摸 出 多少 个 球 ， 才能 保证 3 种颜色 的 球 都 至少 有 4 个 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2160", "content": "妈妈 买 了 一套 衣服 ， 上衣 花 了 152 元 ， 裙子 比 上衣 便宜 52 元 ， 妈妈 买 一套 衣服 一共 花 了 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "361", "content": "妈妈 月 收入 1500 元 ， 爸爸 月 收入 比 妈妈 高 (1/5) ， 爸爸 月 收入 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17808", "content": "火车 原来 从 上海 到 北京 要 9.6 小时 ， 提速 后 ， 速度 是 原来 的 1.2 倍 ， 现在 从 上海 到 北京 需 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15738", "content": "按照 个人所得税法 规定 ， 每月 的 个人收入 超过 800 元 的 部分 应 按照 5% 的 税率 征收 个人所得税 ， 小 刚 的 父亲 本月 缴纳 个人所得税 是 85 元 ， 你 能 算 出 小 刚 的 父亲 本月 工资 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1699", "content": "一 根 绳子 ， 如果 用 去 (1/4) ， 还 剩下 9 米 ； 如果 用 去 (5/6) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14110", "content": "张 奶奶家 前 6 个 月 一共 用水 108 吨 ． 平均 每个 月 用水 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15843", "content": "某班 举行 棋类 比赛 ， 参加 象棋 比赛 的 有 12 人 ， 参加 围棋比赛 的 有 7 人 ， 既 参加 象棋 比赛 又 参加 围棋比赛 的 有 3 人 ， 参加 棋类 比赛 的 共有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8205", "content": "石林 到 大理 的 距离 是 360 千米 ， 早上 客车 以 每 小时 58 千米 的 速度 开往 大理 ， 同时 有 一辆 小汽车 以 每 小时 62 千米 的 速度 开往 石林 ． 两车 经过 多长时间 在 途中 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1216", "content": "一 个数 增加 它 的 25% 是 40 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17627", "content": "比 0.9 大 4.7 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2263", "content": "小 刚 有 一本 故事书 共 60 页 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 40% ， 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18895", "content": "某村 修 一条 公路 ， 前 10 天 修 了 (2/15) ， 照 这样 计算 ， 剩下 的 路 还要 修 多少 天 才能 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14526", "content": "一 辆 摩托车 前 3 小时 行 了 195 千米 ， 后 2 小时 行 了 150 千米 ， 摩托车 的 平均速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9035", "content": "某校 少先队员 采集 树种 ， 四年级 采集 了 (1/2) 千克 ， 五年级 比 四年级 多 采集 (1/3) 千克 ， 六年级 采集 的 是 五年级 的 (6/5) ． 六年级 采集 树种 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11636", "content": "六年级 有 男生 80 人 ， 比 女生 多 (1/4) ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20530", "content": "在 一道 除法 算式 里 ， 除数 是 70 ， 商 是 43 ， 余数 是 40 ， 则 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15069", "content": "同学 们 为 灾区 捐款 ， 五年级 捐献 了 2000 元 ， 六年级 捐献 的 比 五年级 多 (1/4) ， 六年级 共 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13983", "content": "(12/13) * (91/144) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "182", "content": "一 个 车轮 的 外 直径 是 4 dm ， 它 滚动 10 距离 = 多少 dm ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "217", "content": "六年级 的 男生 人数 是 女生 的 人数 的 (3/4) ， 那么 男生 人数 占 全年 级 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18374", "content": "一 台 vcd 现价 200 元 ， 原价 489 元 ， 现价 比 原来 的 价格便宜 多少 元 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6757", "content": "甲 、 乙 两个 美术 兴趣小组 ， 甲组 4 人 每人 作画 80 张 ， 乙组 6 人 每人 作画 90 张 ． 甲 、 乙 两组 平均 每人 作画 多少 张 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12263", "content": "张 晓 同 用 自己 的 零花钱 买 书 捐给 一所 希望 小学 ， 科技 书 每 本 9.73 元 ， 故事书 每 本 6.27 元 ， 她 各 买 20 本 ． 张 晓 同一 共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1563", "content": "1 / (1/2) / (1/3) = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4742", "content": "一 堆 沙 ， 第一天 用 去 (1/2) ， 第 二 天 用 去 (1/3) ， 如果 还 余下 10 吨 ， 这 堆 沙 共 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4390", "content": "学校食堂 的 操作间 长 10 米 ， 宽 8 米 ， 共 铺地砖 960 块 ， 平均 每平方米 铺 了 多少 块 地砖 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20009", "content": "某 品牌 冰箱 现价 比 原价 便宜 了 (2/9) ， 比 原价 便宜 了 180 元 ． 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19634", "content": "一 列 火车 长 800 米 ， 它 通过 路边 的 一棵 大树 用 了 2 分钟 ； 它 用 同样 的 速度 通过 一座 大桥 用 了 5 分钟 ， 这 座 大桥 长 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5084", "content": "一 件 上衣 如果 售价 120 元 ， 则 能 赚 20% ， 如果 售价 110 元 ， 能 赚 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21948", "content": "小 明 帮 妈妈 卖 西瓜 ， 上午 卖出 240 千克 ， 共 卖 得 168 元 ， 下午 卖出 570 千克 ． 下午 比 上午 多 卖 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11973", "content": "一 辆 公共汽车 ， 从 起点站 开出 时 车上 座位 刚好 坐满 ， 中途 有 (1/8) 的 人 下车 ， 又 上车 10 人 ， 这样 有 6 人 没有 座位 ． 这时 车上 有 乘客 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21418", "content": "小 红 的 前面 有 6 人 ， 后面 有 18 人 ， 小 红 这 一排 一共 有 多少 人 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22106", "content": "小 杰 用 (2/5) 小时 走 了 (14/15) 千米 ， 则 小 杰 行走 的 速度 是 每 小时 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4603", "content": "甲 、 乙 两个 工程队 分别 从 两端 修 一条 公路 ． 甲队 每天 修 53 米 ， 乙 队 每天 修 47 米 ， 16 天 修 完 ． 这 条 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15702", "content": "李师傅 一共 生产 了 180 个 零件 ， 合格率 是 90% ， 其中 不 合格 的 零件 有 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9604", "content": "幸福 小区 有 甲 、 乙 两支 秧歌队 ， 甲队 有 48 人 ， 乙 队 的 人数 比 甲队 多 (1/6) ， 乙 队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12305", "content": "小林 看 一本 350 页 的 书 ， 他 前 6 天 每天 看 了 35 页 ， 第 7 天 看 了 55 页 ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "471", "content": "海河 印刷厂 今年 上半年 收入 71.34 万元 ， 支出 32.56 万元 ； 下半年 收入 83.28 万元 ， 支出 41.32 万元 ． 海河 印刷厂 今年 纯收入 多少 万元 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12045", "content": "一 节 火 车厢 ， 从 里面 量 ， 长 13 米 ， 宽 2.7 米 ， 装 的 煤 高 1.5 米 ， 平均 每 立方米 煤 重 1.33 吨 ， 这 节车厢 里 的 煤 重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6645", "content": "一 根 绳子 剪 去 (2/5) ， 还 剩 75 米 ， 如果 再剪 (2/3) ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19029", "content": "小强 走路 从 家 到 学校 共 花 了 10 分钟 ， 小强 步行 的 速度 是 80 米 / 分 ， 请问 小强 家 到 学校 的 路程 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8027", "content": "一 个数 的 3.5 倍 是 9.8 ， 这个 数 的 1.2 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21521", "content": "要 包装 600 个 零件 ， 每 3 个 零件 装 一盒 ， 每 4 盒装 一箱 ， 一共 可 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17409", "content": "新庄 小学 校园 总面积 的 (5/8) 是 空地 ， 空地 的 (2/5) 准备 铺 草坪 ， 铺 草坪 的 面积 占 校园 总面积 的 几分 之 几 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4715", "content": "看 一 本书 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 了 全书 的 (1/4) ， 还 剩下 90 页 未 看 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14059", "content": "一 个数 减去 848 等于 1576 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14622", "content": "希望 小学 有 6 个 年级 ， 平均 每个 年级 有 243 人 ， 希望 小学 一共 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12086", "content": "一 双 布鞋 25.65 元 ， 一双 皮鞋 比 布鞋 贵 216.45 元 ， 王老师 买 一双 皮鞋 付给 售货员 300 元 ， 应 找回 多少 元 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21857", "content": "一 列 火车 从 甲 城 开往 乙 城 ， 需要 行驶 18 小时 才能 到达 ， 火车 5 小时 行驶 480 千米 ， 甲 城 距 乙 城 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21993", "content": "小 明 家 到 学校 480 米 ， 用 8 分钟 走 到 ． 照 这样 计算 ， 小 明 家 到 电影院 有 720 米 ， 他 要 走 几分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5738", "content": "一 个 粮店 原来 有 大米 560 千克 ， 卖出 298 千克 后 又 运 来 239 千克 ， 现在 粮店 有 大米 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4402", "content": "从 甲地 到 乙地 有 2 条 路 可 走 ， 从 乙地 到 丙 地 有 4 条 路 可 走 ， 那么 从 甲地 经过 乙地 到 丙 地 共有 多少 种 不同 的 走法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "513", "content": "某班 有 男生 30 人 ， 女生 24 人 ， 女生 人数 是 男生 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13276", "content": "某校 六年级 有 男生 180 人 ， 女生 人数 是 男生 的 (5/9) ． 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10995", "content": "甲 、 乙 两地 相距 300 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 3 小时 行 了 全程 的 (3/5) ， 汽车 离 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20810", "content": "世界 上 最高 的 动物 是 长颈鹿 ． 有 一只 高 5 米 ， 比 一头 大象 还要 高 (2/3) ． 这 头 大象 有 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8038", "content": "动物园 有 4 只 老虎 ， 共 重 1120 千克 ． 有 一只 大象 ， 比 老虎 的 平均 重量 还 重 4320 千克 ， 这 只 大象 重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21513", "content": "小 明 的 爸爸 喜欢 集邮 ， 他 收集 的 邮票 中 有 20% 是 关于 戏曲 的 ， 有 30% 是 关于 书法 和 绘画 的 ， 这 两种 邮票 一共 有 175 张 ， 小 明 的 爸爸 共 收集 了 多少 张 邮票 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18266", "content": "冬冬 每分钟 跳绳 能 跳 150 下 ， 明明 每分钟 比 他 多 跳 12% ， 明明 每分钟 能 跳 多少 下 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12181", "content": "饲养场 有 白兔 60 只 ， 灰 兔 比 白兔 多 20% ， 有 灰 兔 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7841", "content": "商店 运 来 苹果 和 香蕉 共 120 千克 ． 其中 香蕉 占 (2/5) ， 香蕉 有 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15232", "content": "水果店 运 来 苹果 、 梨 各 12 箱 ， 苹果 每箱 28 千克 ， 梨 每箱 32 千克 ． 运 来 的 苹果 比 梨 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3209", "content": "把 一个 长 49 厘米 ， 宽 4 厘米 ， 高 3 厘米 的 长方体 铁块 ， 熔铸 成 一个 高 12 厘米 的 圆锥体 ， 这个 圆锥 的 底 面积 = 多少 平方厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6517", "content": "一 部 儿童 电视剧 一共 要 播放 560 分钟 ， 如果 每天 播放 35 分钟 ， 多少 天 可以 播放 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6696", "content": "一 条 水渠 长 106.53 米 ， 比 另 一条 长 5.74 米 ， 两条 水渠 一共 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18476", "content": "60 / 180 - 120 的 差 ， 商 是 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14758", "content": "一 个 班 有 45 人 ， 喜欢 体育 活动 的 有 29 人 ， 喜欢 文艺活动 的 有 23 人 ， 有 5 人 对 这两项 都 没有 兴趣 ， 求 两种 活动 都 喜欢 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7175", "content": "一 位 会计 把 一笔 488 元 的 收入 账 错误 地 记 成 了 48.8 元 ． 他 在 结账 时 将 会 发现 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4552", "content": "育才 小学 师生 开展 为 希望工程 购买 爱心 助学 卡 活动 ． 全校 24 个 班级 ， 平均 每班 学生 买 100 张 ， 全校 老师 一共 购买 160 张 ． 育才 小学 师生 共 购买 爱心 助学 卡 的 多少 张 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "139", "content": "赵老师 买 5 枝 同样 的 钢笔 用 了 35 元 ， 她 还 想 买 10 枝 这样 的 钢笔 ， 需要 准备 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10984", "content": "东风 电动车 厂 去年 第一季度 计划 生产 电动车 1200 辆 ， 实际 多 生产 了 96 辆 ． 实际 完成 了 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12781", "content": "六年级 （ 1 ） 班 为 四川 大 地震 的 灾民 捐款 ， 原来 每人 捐 20 元 ， 全班 有 40 人 ， 后来 每人 又 多 捐 (1/4) ， 实际 全班 共 捐 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21108", "content": "一 间 教室 长 (32/3) 米 ， 宽 (27/4) 米 ， 教室 里 有 55 人 上课 ， 平均 每人 占地 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16949", "content": "印刷 车间 要 装订 1314 套书 ， 已经 完成 362 套 ， 剩下 的 14 天 完成 ， 平均 每天 订 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13917", "content": "小 明 读 一 本书 ， 已 读 的 页数 和 未 读 的 页数 之 比 是 5 ： 4 ． 如果 再 读 27 页 ． 已 读 的 页数 和 未 读 的 页数 之 比 是 2 ： 1 ． 求 这 本书 有 多少 页 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12105", "content": "星期天 王 华 一家 去 郊游 ， 去 时 每 小时 行驶 60 千米 ， 用 了 3 小时 ， 返回 用 了 2 小时 ． 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7964", "content": "李师傅 做 一个 玩具 的 时间 由 原来 的 12 分钟 减少 到 8 分钟 ， 原来 做 200 个 玩具 的 时间 ， 现在 可以 多 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6972", "content": "一 根 铁丝 第一次 用 去 10 米 ， 是 第 二 次 用 去 的 (6/7) ， 两次 一 共用 去 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3132", "content": "六年级 两个 班 的 学生 采集 树种 ， 一班 45 人 ， 每人 采集 了 0.13 千克 ， 二 班 36 人 共 采集 6.15 千克 ， 两个 班 一共 采集 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7588", "content": "一 个 排球 的 价钱 是 120 元 ， 是 一个 篮球 价钱 的 (4/5) ， 一个 篮球 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6996", "content": "一 本 故事书 ， 小 红 第一天 看 了 全书 的 (4/15) ， 第 二 天 看 了 全书 的 (1/4) ， 两天 看 了 这 本书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9160", "content": "在 一张 长 8 分 米 ， 宽 4 分 米 的 长方形 纸 上 剪下 两个 最大 的 圆 ， 每个 圆 的 周长 = 多少 分 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16112", "content": "甲乙 两 人 同时 由 a 地 去 b 地 ， 甲 每分钟 走 65 米 ， 乙 每分钟 走 75 米 ． 途中 乙 休息 了 10 分钟 ， 结果 乙 比 甲 迟 2 分钟 到达 b 地 ． 则 ab 两地 相距 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9912", "content": "一 块 手表 打 0.85 后 便宜 30 元 ， 其 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2053", "content": "某 文具店 正在 举行 店 庆 活动 ， 所有 商品 一律 0.8 销售 ． 天天 买 了 一支 原价 12 元 的 钢笔 和 一只 原价 36 元 的 书包 ． 他 实际 需要 付 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11023", "content": "某 公司 组织 旅游 ， 去 北京 旅游 的 占 总 人数 的 (2/5) ， 去 海南 旅游 的 占 总 人数 的 (2/7) ， 剩下 的 去 青岛 旅游 ， 去 青岛 旅游 占 总 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21153", "content": "油菜籽 的 出油率 是 45% ， 要 榨 2100 千克 的 菜籽油 ， 需要 多少 千克 油菜籽 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17324", "content": "一 辆 货车 和 一辆 客车 同时 从 相距 320 千米 的 两地 相对 开出 ， 货车 每 时 行驶 40 千米 ， 行驶 完全 程 客车 比 货车 少 用 4 时 ． 客车 每 时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3693", "content": "丹 灶 小学 六年级 有 男生 59 人 ， 女生 37 人 ， 四年级 学生 人数 是 六年级 人数 的 (7/8) ， 四年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13397", "content": "食品店 的 一种 龙须面 售价 为 每箱 23 元 ， 上周 卖出 这种 龙须面 20 箱 ， 扣除 成 和 各种 费用 258 元 ， 还 能 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2534", "content": "修路 队 修 一段 公路 ， 第一天 修 了 这 段 路 的 (1/2) ， 第 二 天 修 了 这 段 路 的 (3/7) ， 还 剩 几分 之 几 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7949", "content": "一 辆 摩托车 的 价钱 相当于 8 辆 自行车 的 价钱 ， 一辆 小汽车 的 价钱 相当于 9 辆 摩托车 的 价钱 ． 一辆 自行车 500 元 ， 一辆 小汽车 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5487", "content": "把 200 本书 按 5 ： 3 分给 甲 、 乙 两个 班 ， 甲班 分 得 多少 本 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12241", "content": "操场上 男生 有 120 人 ， 女生 比 男生 多 (1/5) ， 女生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19601", "content": "某 小学 四年级 学生 组织 参观 科技馆 ， 男生 有 204 人 ， 女生 有 196 人 ． 如果 每 40 人 坐 一辆 汽车 ， 一共 需要 多少 辆 汽车 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1663", "content": "8 比 多少 多 25% ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7321", "content": "一 辆 汽车 在 甲乙 两地 间 行驶 ， 从 甲地 去 乙地 时 每 小时 行驶 60 千米 ， 8 小时 到达 ， 回来 时 载重 每 小时 行驶 48 千米 ， 几小时 可以 返回 到 甲地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4237", "content": "一 条 公路 全长 400 米 ， 已修 全长 的 (4/5) ． 已修 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5120", "content": "六年级 有 学生 111 人 ， 相当于 五年级 人数 的 (3/4) ， 五年级 一共 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15324", "content": "幼儿园 的 王老师 在 商店 里 用 100 元 钱 购买 了 3 个 小 足球 ， 找回 22 元 ． 每个 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22024", "content": "一 堆 货物 240 吨 ， 第一次 运走 总数 的 (2/5) ， 第 二 次 运走 总数 的 (1/4) ， 这 堆 货物 还 剩下 多少 吨 没有 运 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16819", "content": "数学课 上 ， 同学 们 做 练习 的 时间 用 了 (2/5) 小时 ， 老师 讲解 比 同学 们 做 练习 少 用 了 (1/6) 小时 ． 老师 讲解 和 同学 们 做 练习 一 共用 了 多少 小时 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15071", "content": "四年级 有 学生 120 人 ， 五年级 的 学生 比 四年级 的 多 (1/4) ， 六年级 的 学生 比 五年级 的 少 10 人 ． 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14618", "content": "2003 年 有人 在 亚洲 的 印尼 热带 森林 中 捕获 了 一条 重 447 千克 的 巨蟒 ， 这 条 巨蟒 堪称 “ 蛇 王之王 ” ． 我国 最重 的 东北虎 有 350 千克 ， 这 条 巨蟒 比 我国 最重 的 东北虎 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5772", "content": "一 条 路 已修 的 比 全长 的 (13/20) 少 1.44 千米 ， 没 修 的 占 全长 的 (3/4) ， 这 条 路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19144", "content": "朝 春 小学 评 “ 朝 春 之 星 “ ， 三年级 有 25 名 ， 比 四年级 少 8 名 ， 四年级 共有 几名 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11655", "content": "一 段 方 钢 长 30 dm ， 宽 0.8 dm ， 高 0.6 dm ， 如果 每 立方分米 的 钢 重 7.8 kg ， 这 段 方 钢 重 多少 kg ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "13904", "content": "一 套 西服 打 0.8 后 售价 168 元 ， 这 套 西服 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19014", "content": "计算 ： 1.87 - (1/4) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1776", "content": "在 通常 情况 下 ， 体积 相等 的 冰 的 质量 比 水 的 质量 少 (1/10) ． 现有 一块 重 18 千克 的 冰 ， 如果 有 一桶 水 的 体积 和 这 块冰 的 体积 相等 ， 这 桶 水 有 多重 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2161", "content": "新华 大楼 某 品牌 的 衣服 0.8 出售 ， 李老师 在 打折 期间 买 了 一件 ， 花 了 200 元 钱 ， 这件 衣服 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20475", "content": "商店 购回 25 箱 足球 ， 每箱 4 个 ， 共 4800 元 ， 每个 足球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21641", "content": "小 明 把 平时 积攒 的 1000 元 存入 银行 ， 整存整取 3 年 ， 年利率 是 3.24% ， 到期 时 小时 可以 取出 税后 利息 = 多少 元 ？ （ 国家 规定 利息税 是 20% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20571", "content": "货场 有 一批 煤 ， 第一次 运走 总数 的 20% ， 第 二 次 运走 总数 的 40% ， 两次 共 运走 27.6 吨 ． 这 批 煤 原来 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1149", "content": "“ 国庆 ” 期间 ， 中央 国际 新亚 商城 搞 促销 让利 活动 ， 一种 彩电 现价 2800 元 ， 现价 比 原价 降低 了 700 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22513", "content": "一 辆 客车 和 一辆 货车 从 相距 96 千米 的 a 、 b 两地 同时 出发 ， 同 向 而 行 ， 货车 在 前 ， 客车 在 后 ． 5 小时 后 两车 相距 的 路程 缩短 为 16 千米 ． 客车 每 小时 行 78 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10642", "content": "食堂 有 大米 (5/4) 吨 ， 用 去 它 的 (1/5) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8482", "content": "用 15 克 盐 配制 成 含盐 率 为 5% 的 盐水 ， 需 加水 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13427", "content": "一 只 排球 16 元 ， 正好 是 一只 足球 价钱 的 (4/7) ． 这 只 足球 的 价钱 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20219", "content": "某 酒店 今年 元月份 营业额 为 85 万元 ， 按规定 应 按 营业额 的 5% 缴纳 营业税 ． 这家 酒店 这个 月 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20736", "content": "有 苹果 若干个 ， 把 其中 的 (1/3) 给 a ， 把 余下 的 (1/5) 少 3 个 的 苹果 分给 b ， 再 把 剩下 的 全部 苹果 都 给 c ， 这样 c 得到 的 苹果 比 a 得到 的 苹果 数多 21 个 ， 问 共有 多少 个 苹果 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4013", "content": "工人 们 修 马路 ， 原 计划 用 40 个 工人 ， 实际 用 了 45 个 工人 ． 计划 要 修路 90 天 ， 实际 修 了 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5954", "content": "一 辆 汽车 3 小时 行 310 千米 ， 平均 每 小时 行 多少 千米 ？ （ 用 分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12073", "content": "两个 施工队 合 挖 一条 长 1791.6 米 的 污水 管道 ， 甲队 每天 挖 76.8 米 ， 乙 队 每天 挖 72.5 米 ． 两队 合 挖 用 几天 完工 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15196", "content": "学校 买 了 2 盒 铅笔 ， 每盒 48 支 ， 平均 分给 8 个 班级 ， 每个 班级 分 几支 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4221", "content": "一 个 邮票 商人 用 700 元 买 一张 罕见 的 邮票 ， 以 800 元 卖掉 了 ， 又 用 900 元 买回来 ． 最后 以 1000 元 卖掉 了 ． 那么 从 这 几次 买卖 中 他 赚 了 多少 元 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19252", "content": "足球场 的 宽 是 70 米 ， 是 长 的 (2/3) ． 足球场 的 长 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20260", "content": "售货员 小 李 由于 粗心大意 ， 误 把 单价 为 3.2 的 钢笔 当作 2.3 元 出售 ， 一共 卖出 22 支 ， 结果 小 李 要 赔款 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3343", "content": "林场 去年 种 了 2400 棵 树 ， 没有 成活 的 占 总 棵 数 的 5% ． 成活 的 有 多少 棵 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7515", "content": "计算 某 数 除以 3.75 时 ， 把 除 号 看成 了 乘 号 ， 结果 是 225 ， 这 道 题 的 正确 答案 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21444", "content": "甲 数 是 156 ， 比 乙 数 的 2 倍 多 8 ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "342", "content": "一 段 公路 长 (8/9) km ， 已经 修 了 (2/3) km ． 剩下 的 比 已修 的 少 多少 km ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21283", "content": "北京 在 2008 年 奥运会 主办权 中 ， 共有 105 张 有效票 ， 北京 获得 56 张 ． 北京 的 得票 占 有效票 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11609", "content": "妈妈 将 5000 元 人民币 存入 银行 ， 定期 一年 ， 年利率 1.98% ， 利息税 为 5% ， 到期 后 ， 妈妈 可以 从 银行 取回 本金 和 税后 利息 一共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "8132", "content": "一 头 鲸 长 7 米 ， 头 部长 占 全长 的 (2/5) ， 这 头 鲸 除 头 外 的 身体 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12924", "content": "一 节 火 车厢 ， 从 里面 量 ， 长 13 米 ， 宽 3 米 ， 装 的 煤 高 2 米 ， 平均 每 立方米 煤 重 1.3 吨 ， 这 节车厢 里 的 煤 重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "356", "content": "从 煤矿 要 运走 150 吨 煤 ， 每辆 卡车 装 5 吨 煤 ， 已经 装有 了 6 辆 卡 ， 还要 装 多少 辆车 才能 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18033", "content": "某 乡 要 修 一条 环山 水渠 ， 第一期 修 了 全长 的 50% ， 第 二 期 修 了 全长 的 30% ， 还 剩 800 米 没 修 ． 这 条 环山 水渠 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3629", "content": "一 辆 汽车 从 甲地 到 乙地 ， 第一 小时 行 了 全程 的 25% ， 第 二 小时 比 第一 小时 多行 20 千米 ， 还 剩下 200 千米 ， 甲乙 两地 全长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12778", "content": "小 伟 看 一本 120 页 的 书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 全书 的 25% ， 两天 一共 看书 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8494", "content": "一 项 工程 ， 甲队 单独 做 5 天 完成 ， 乙 队 单独 做 7 天 完成 ， 两队 合作 每天 完成 这项 工程 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8083", "content": "甲地 地 乙地 有 不同 的 3 条 路 可 走 ， 乙地 到 丙 地 有 不同 的 4 条 路 可 走 ， 小 军 从 甲地 到 丙 地 必 经过 乙 ， 他 有 多少 种 不同 的 走法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "735", "content": "小张 、 小 王 和 小 李 练习 投 篮球 ， 一共 投 了 100 次 ， 有 43 次 没 投进 ， 已知 小张 和 小 王 一共 投进 了 32 次 ， 小 王 和 小 李 一共 投进 了 46 次 ， 小 王 投进 了 多少 次 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10100", "content": "某县 去年 植树造林 80 公顷 ， 今年 比 去年 增加 了 25% ， 今年 植树造林 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16", "content": "小 红 每 小时 跳绳 25 下 ， 小 军 每 小时 跳 的 下 数 比 小 红 的 3 倍 多 10 下 ， 小 军 每 小时 跳 多少 下 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22531", "content": "公园 里 有 柳树 60 棵 ， 松树 的 棵 数 是 柳树 棵 树 的 (2/3) ， 公园 里 的 松树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "542", "content": "乔 乔 从 学校 到 家 720 米 共 走 了 12 分钟 ， 她 以 同样 的 速度 ， 从 距 家 420 米 的 游乐园 走 回家 ， 要 走 几分钟 ？ （ 列 综合 算式 解答 ）", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19350", "content": "东风 农机厂 原来 制造 一台 农业机器 要 用 1.43 吨 钢材 ， 技术革新 后 ， 每 台 节省 钢材 0.13 吨 ． 原来 制造 300 台 机器 的 钢材 ， 现在 可以 制造 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18466", "content": "76 与 25 的 差 乘 33 ， 积 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "229", "content": "生产 一种 机器 零件 ， 原来 的 成本 是 20 元 ， 技术革新 后 只用 15 元 ， 这种 零件 的 成本 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6619", "content": "从 重庆 到 贵州 有 750 千米 ， 一辆 卡车 已经 行 了 210 千米 ， 平均 每 小时 行 45 千米 ． 还要 几小时 才能 到达 贵州 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7787", "content": "李 叔叔 买 5 箱 雪梨 用 了 190 元 ． 他 还 想 再 买 8 箱 这样 的 雪梨 ， 还 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21703", "content": "按 规律 填 数 ： 3 ， 9 ， 27 ， 81 ， 多少 ， 729 ， …", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17873", "content": "15.2 与 6.3 的 积 除以 32 ， 结果 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17433", "content": "一 桶 油 ， 用 去 了 它 的 (2/3) ， 正好 用 去 50 千克 ， 这 桶 油 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16933", "content": "学校 买来 24 包 练习本 ， 每包 80 本 ， 每 本 0.35 元 ， 买 这些 练习本 共 花 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19228", "content": "一 个数 被 2 ， 3 ， 7 除 结果 都 余 1 ， 这个 数 最小 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4674", "content": "甲 数 的 (3/5) 是 乙 数 的 (5/6) ， 乙 数 是 18 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14303", "content": "一 座 水塔 高 23 米 ， 一座 电视发射塔 的 高度 是 水塔 的 13 倍 ． 这 座 电视发射塔 比 水塔 高 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11030", "content": "某 超市 本周 的 营业额 是 10.5 万元 ， 比 上周 增加 了 5% ， 上周 的 营业额 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4873", "content": "小 丽 身高 在 118 厘米 ， 是 表妹 身高 的 2 倍 ， 而 舅舅 高 是 表妹 的 3 倍 ． 舅舅 身高 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22766", "content": "一 辆 汽车 由 甲地 开往 乙地 ， 每 小时 行 80 千米 ， 已经 行 了 1.5 小时 ， 已 行 的 路程 是 剩下 路程 的 (3/5) ． 按 这样 的 速度 ， 剩下 的 路程 还要 行 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21918", "content": "明明 家 这个 月 交 了 240 元 水电费 ， 比 上个月 节约 了 60 元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20813", "content": "把 80 增加 80% 后 ， 再 减少 10% ， 结果 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "11518", "content": "760 + 800 与 680 的 差 ， 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8183", "content": "(1/4) * (1/5) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1972", "content": "有 一瓶 牛奶 ， 小 明 喝 了 这 瓶 牛奶 的 (3/5) ， 小 红 喝 了 这 瓶 牛奶 的 (1/5) ， 小 红 比 小 明 少 喝 这 瓶 牛奶 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22089", "content": "新兴 机械厂 扩展 厂房 ， 原 计划 投资 400 万元 ， 实际 投资 360 万元 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8862", "content": "水果店 运 来 42 筐 水果 ， 其中 梨 占 (2/3) ， 梨 有 多少 筐 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "52", "content": "联华 超市 凭 会员卡 购物 可以 打 0.95 ， 王老师 为 准备 联欢会 去 购买 某 品牌 饮料 2 箱 ， 他 使用 会员卡 共 付 61.75 元 ． 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7341", "content": "一 堂 数学课 ， 复习 用 去 (1/12) 小时 ， 讲 新 课 用 去 (1/3) 小时 ， 学生 练习 用 去 (1/4) 小时 ， 这 节 课 共有 几小时 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7180", "content": "服装厂 上半年 生产 童装 24500 套 ， 下半年 生产 的 童装 比 上半年 的 2 倍 少 4560 套 ． 全年 生产 童装 多少 套 ？ （ 先 列出 式子 ， 再 用 计算器 计算 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18325", "content": "王 丽 有 4 件 上衣 ， 3 条 裤子 ， 一共 有 多少 种 不同 的 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20336", "content": "修 一条 路 ， 原 计划 投资 56 万元 ， 实际 比 原 计划 节约 投资 (1/8) ， 修 这 条 路 实际 比 原 计划 节约 投资 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "181", "content": "小 明 看 一 本书 ， 每天 看 15 页 ， 4 天 后 还 剩 全书 的 (3/5) 没有 看 ， 问 这 本书 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6228", "content": "实验 小学 的 同学 为 玉树 灾区 捐款 ， 平均 每个 班 捐 45 元 ， 有 6 个 年级 ， 每个 年级 5 个 班 ， 他们 一共 捐 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15836", "content": "小 军 家 离 学校 有 540 米 ， 离 少年宫 900 米 ． 他 从 家 走 到 学校 要 9 分钟 ． 照 这样 的 速度 ， 他 从 家 走 到 少年宫 要 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "133", "content": "学校 有 男生 240 人 ， 是 男女生 总数 的 60% ， 有 女生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19396", "content": "筑路 队 修 一段 公路 ， 平均 每天 修 295 米 ， 修 了 15 天 后 还 剩 1650 米 ． 这 段 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12126", "content": "某 服装厂 接到 660 套 西服 的 订单 ， 约定 8 天 完成 ． 前 3 天 平均 每天 加工 75 套 ． 剩下 的 每天 至少 要 加工 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12570", "content": "从 一张 长 10 分 米 的 正方形 纸 里 剪下 一个 最大 的 圆 ， 这个 圆 的 周长 = 多少 分 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11290", "content": "口袋 里 有 红球 、 黄 球 、 白 球 各 5 个 ， 至少 要 摸 出 多少 个 球 ， 才能 保证 有 3 种 不同 颜色 的 球 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19170", "content": "同学 们 到 车站 义务劳动 ， 3 个 同学 擦 12 块 玻璃 ， 照 这样 计算 ， 9 个 同学 可以 擦 多少 块 玻璃 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18047", "content": "小 明 看 一本 科普 书 ， 已经 看 了 全书 的 20% ， 比 余下 的 少 36 页 ， 这本 科普 书 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19636", "content": "把 一根 长 192 厘米 的 木条 锯 成 每 段 16 厘米 长 的 小 段 ， 一共 要 锯 多少 次 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5921", "content": "6 个 小朋友 一起 玩 跳棋 ， 如果 每人 玩 的 时间 加在一起 是 60 分钟 ， 他们 每人 玩 了 多少 时间 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10478", "content": "有 一套 童话 选 ， 上册 有 292 千字 ， 下册 有 284 千字 ． 四年级 小学生 正在 使用 的 数学 教科书 （ 上册 ） 约 有 80 千字 ， 一套 童话 选 的 字数 相当于 多少 本 四年级 数学 教科书 的 字数 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22393", "content": "一 个数 的 (4/7) 是 28 ， 这个 数 的 (5/49) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11240", "content": "把 浓度 是 95% 的 酒精 溶液 360 克 ， 加水 稀释 成 45% 的 酒精 溶液 ， 需 加水 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18358", "content": "修 一段 公路 ， 第一周 修 了 这 段 公路 的 25% ， 第 二 周 修 了 这 段 公路 的 (1/3) ， 两周 共 修 了 260 千米 ． 这 段 公路 全长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7054", "content": "小强 每天 早上 跑步 15 分钟 ， 他 的 速度 是 120 / 分 ， 小强 每天 跑步 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18890", "content": "一 种 农药 是 药液 和 水 按 1 ： 400 配制 而 成 的 ， 现在 有 5 克 药液 ， 能 配制 这种 农药 多少 克 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16097", "content": "果园 里 有 梨树 120 棵 ， 是 桃树 棵 数 的 (4/5) ， 果园 里 有 桃树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21483", "content": "为 调控 过 快 上涨 的 房价 ， 国务院 于 2011 年 元月 出台 一项 关于 住房贷款 的 新 政策 ： 家庭 购买 第 二 套 信 房 ， 首付款 比例 从不 低于 50% 上调 至 不 低于 60% ． 小 张家 现 打算 贷款 购买 一套 总价 为 85 万元 的 住房 （ 小 张家 已有 一套 房子 ） ， 首付款 最少 要 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "569", "content": "修 一条 公路 ， 已经 修 了 (2/5) ， 还 剩下 300 米 ， 这 条 公路 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15494", "content": "水果店 运 来 26 箱 橙子 ， 每箱 18 千克 ， 运 来 的 苹果 比 橙子 多 278 千克 ， 水果店 运 来 橙子 和 苹果 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "22414", "content": "榜 头 中心小学 男生 有 725 人 ， 比 女生 多 35 人 ． 全校 有 学生 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6348", "content": "王 庄 煤矿 去 年产 煤 250 万吨 ， 今年 比 去年 增产 25 万吨 ． 增产 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15608", "content": "修 一条 公路 ， 修 了 几天 后 ， 剩下 320 米 ， 修 了 的 是 剩下 的 5 倍 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9292", "content": "震区 抢修 一条 生命 通道 ， 第一天 修 了 40% ， 第 二 天 修 了 250 米 ． 两天 共 修 了 这 条 路 的 80% ， 这 条 生命 通道 全长 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18856", "content": "修 一条 路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 全长 的 50% ， 还 剩 3.2 千米 没 修 ， 这 条 路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4788", "content": "五年级 同学 向 希望 小学 捐款 ． 第一 小队 14 人 ， 共 捐款 76 元 ； 第 二 小队 16 人 ， 共 捐款 80 元 ； 第 3 小队 15 人 ， 共 捐款 78 元 ． 全班 平均 每人 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9822", "content": "某 部队 57 辆 军车 排成一列 通过 一座 桥 ， 前后 两辆车 之间 都 保持 2 米 的 距离 ． 桥 长 200 米 ， 每辆 军 车长 5 米 ． 从 第一辆 车上 桥 到 最后 一辆车 离开 桥 ， 车队 共 行驶 了 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14437", "content": "小 红 读 一本 科技 书 第一天 读 了 8 页 ， 以后 每天 比 前一天 多 读 3 页 ， 最后 一天 读 了 32 页 ， 她 一共 读 了 多少 天 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9641", "content": "某 铁厂 前 14 天 平均 每天 制造 36 个 ， 后 11 天 制造 346 个 零件 ， 铁厂 平均 每天 制造 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19898", "content": "联欢会 时 ， 老师 买 奖品 ， 2.4 元 的 奖品 买 了 18 份 ， 1.8 元 的 奖品 买 了 38 份 ， 老师 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8986", "content": "一 个数 的 (2/7) 是 14 ， 这个 数 的 (1/2) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8042", "content": "四年级 准备 制作 162 个 灯笼 庆祝 元旦 ． 已经 制作 63 个 ， 剩下 的 分给 9 个 同学 去 做 ， 平均 每人 要 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11286", "content": "春节 前 ， 明明 的 妈妈 要 给 奶奶 寄 2000 元 ， 邮局 要 收取 1% 的 手续费 ， 那么 明明 妈妈 出 门前 至少 要 带上 多少 元 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19726", "content": "一 列 火车 (7/8) 小时 行 了 210 千米 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9918", "content": "小 明 在 写 一个 小数 时 ， 不 小心 把 小数点 的 位置 写错 了 ， 写成 0.085 ． 原 数 比 现在 的 数多 99 倍 ． 原 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11275", "content": "12 / 600 的 商 ， 加上 187 ， 结果 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9505", "content": "一 个 建筑工地 运 来 水泥 78 吨 ， 运 来 的 钢材 比 水泥 少 12 吨 ． 运 来 石子 的 吨数 是 水泥 和 钢材 的 总 吨数 的 2 倍 ． 运 来 石子 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20264", "content": "4.32 * 15 的 积 加上 0.85 / 5.1 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1574", "content": "950 / 19   的 商 再 乘 159 ， 积 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14141", "content": "小 明 有 一些 邮票 ， 他 把 邮票 的 一半多 2 张 送给 小 红 ， 还 剩下 50 张 ． 他 原来 有 多少 张 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16137", "content": "一 枝 钢笔 的 价钱 是 6 元 ， 一支 圆珠笔 的 价钱 比 钢笔 便宜 (1/12) ， 一支 圆珠笔 的 价钱 多少 元 ？ ’", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16737", "content": "一 件 标价 为 600 元 的 上衣 ， 按 0.8 销售 仍 可 获利 20 元 ． 这件 上衣 的 成本 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "256", "content": "4 个数 的 平均数 是 7.3 ， 后 3 个数 是 6.1 ， 7.2 ， 9.5 ， 第一个 数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20086", "content": "某 工厂 要 加工 660 套 衣服 ， 已经 加工 了 5 天 ， 每天 加工 75 套 ， 余下 的 要 3 天 完成 ， 每天 应 加工 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3090", "content": "一 列 火车 从 甲 站 开往 乙 站 ， 行 了 全程 的 20% 后 又 行 了 1 小时 ， 这时 已 行 的 路程 和 剩下 的 路程 的 比 是 3 ： 2 ， 这 列 火车 行 完全 程 要 多少 小时 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13467", "content": "学校 图书室 新 进 了 25 套 同样 的 课外书 ， 每套 有 4 本 ， 一共 花 1000 元 ． 每 本 课外书 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22603", "content": "李 明 家 距离 县城 60 千米 ． 以前 骑 自行车 ， 需要 4 小时 才能 到达 县城 ． 现在 乘 汽车 ， 平均 每 小时 行 90 千米 ． 汽车 的 速度 是 自行车 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11408", "content": "包装 560 本 《 故事 大王 》 ， 一共 包装 成 8 包 ， 每包 里 有 10 捆 ， 几本 《 故事 大王 》 扎成 一捆 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4306", "content": "一 辆 汽车 从 车站 开出 时 恰好 坐满 了 人 ， 途中 到达某 站 ， 有 (1/4) 的 乘客 下车 ， 又 有 21 人 上车 ， 有 6 位 乘客 没有 座位 ． 现在 ， 车 内 有 乘客 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20607", "content": "“ 5 一 ” 假期 时 ， 小 明 一家 5 个人 去 北京 旅游 ， 去 时 乘火车 ， 回来 时 乘飞机 ， 火车票 每张 80 元 ， 飞机票 每张 600 元 ． 请 你 算 一 算 他们 的 交通费 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9744", "content": "丽丽 写毛笔字 ， 计划 每天 写 15 个 ， 实际 每天 多 写 5 个 ， 结果 提前 2 天 完成 任务 ． 丽丽 共 要 写 多少 个 毛笔字 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19363", "content": "210 * 3 + 多少 = 900 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17607", "content": "小 明 购买 了 4 本 《 蓝 猫 淘气 3000 问 》 ， 售价 67.2 元 ， 平均 每 本 售价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17790", "content": "农民 伯伯 卖出 苹果 150 kg ， 比 卖出 梨 的 (9/10) 少 30 kg ． 卖出 梨 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20069", "content": "一 台 电脑 原价 6500 元 ， 现 0.95 出售 ， 现价 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16321", "content": "小 明 今年 12 岁 ， 妈妈 的 年龄 比 小 明 的 3 倍 还 多 2 岁 ， 妈妈 今年 多少岁 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2204", "content": "一 个数 的 (1/3) 比 它 的 (1/2) 少 5 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3088", "content": "甲 数 是 乙 数 的 (2/3) ， 甲 数 是 120 ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21431", "content": "已知 两个 因数 的 积 是 0.24 ， 其中 一个 因数 是 0.3 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17585", "content": "工程队 要 修 一段路 ． 原 计划 每天 修 120 米 ， 需 60 天 完成 ； 现在 要 提前 20 天 完成 ， 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22277", "content": "某 商品 卖出价 比 进货价 增加 (1/20) ， 则 进货价 比 卖出价 少 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21657", "content": "商店 运 来 一批 笔记本电脑 ， 剩下 的 与 卖出 的 台数 比 是 5 ： 3 ， 剩下 的 比 卖出 的 多 18 台 ， 这家 商店 共运 来 笔记本电脑 多少 台 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16483", "content": "小巧 每分钟 跳 126 下 ， 比 小胖 的 2 倍 少 48 下 ， 小胖 每分钟 跳 几下 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15610", "content": "一 名 打字员 已经 打 了 1400 个 字 ， 比 没 打 的 少 30% ， 还有 多少 字 没有 打 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18622", "content": "帝 湖 小区 共有 15 栋 楼房 ， 每栋 有 130 户 人家 ． 帝 湖 小区 一共 住 了 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8706", "content": "甲 、 乙 两辆 客车 同时 从 威海 出发 开往 北京 ． 经过 18 小时 后 ， 甲 车 落 在 乙 车 后面 360 千米 ． 甲 车 每 小时 行 90 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5811", "content": "小 刚 家 买来 一袋 面粉 ， 吃 了 (3/4) ， 还 剩 5 千克 ． 这 袋 面粉 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10308", "content": "某 修路 队 修 一段 长 15 千米 的 公路 ， 已经 修 了 全长 的 (2/5) ， 还 剩 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19076", "content": "已知 两个 数 的 积 是 28.8 ， 其中 一个 数 是 9 ， 另 一个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13772", "content": "宝安 外国语 学校 这次 才艺 展示 ， 三年级 80.5 分钟 ， 比 六年级 多 15% ， 六年级 才艺 展示 用 了 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4943", "content": "两个 工程队 共同 开凿 一条 隧道 ， 各 从 一端 向 中间 开凿 ． 第一 工程队 每天 开凿 12 米 ， 第 二 工程队 每天 开凿 15 米 ， 经过 30 天 全部 开通 ． 这 条 隧道 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20662", "content": "果园 里 梨树 与 桃树 的 比 是 3 ： 5 ， 已知 梨树 比 桃树 少 40 棵 ， 这个 果园 共有 果树 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22789", "content": "小 华 家 今年 的 人均收入 是 3000 元 ， 比 去年 上涨 了 (1/5) ， 去年 小 华 家 的 人均收入 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20936", "content": "一 个数 的 43 倍 是 774 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22210", "content": "一 种 电扇 原价 300 元 ， 第一次 按 (9/10) 出售 ， 第 二 次 再 降价 10% ． 这种 电扇 现价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19258", "content": "修路 队 修 一条 公路 ， 已修 部分 与 未 修 部分 的 比 是 5 ： 3 ， 又 知 已修 部分 比 未 修 部分 长 600 米 ， 这 条 路 长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8062", "content": "在 一个 除法 算式 中 ， 商 和 除数 都 是 4 ， 余数 是 1 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14613", "content": "美术 小组 有 24 人 ， 美术 小组 的 人数 比 航模 小组 人数 少 (1/4) ． 航模 小组 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18117", "content": "果园 里 的 桃树 比 杏树 多 40 棵 ， 杏树 的 棵 数 是 桃树 的 80% ， 桃树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4004", "content": "小 刚 家 买 了 一 长方体 玻璃 鱼缸 ， 长 45 厘米 ， 宽 30 厘米 ． 小 刚 往 水箱 中加 了 20 厘米 深 的 水 后 ， 又 放入 金鱼 ， 当 金鱼 全部 游 入 水 下面 时 ， 测 的 水深 23 厘米 ． 放入 的 鱼 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13456", "content": "学校 花坛 里 栽 了 13 排 月季花 ， 每排 12 棵 ． 还 栽 了 8 排 菊花 ， 每排 24 棵 ， 月季花 比 菊花 少 栽 了 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15778", "content": "冰 化成 水 ， 体积 减少 (1/10) ， 水 结成 冰 ， 体积 增加 了 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21544", "content": "东华 小学 5 、 六年级 同学 向 四川 赈灾 捐款 900 元 ． 已知 五年级 的 捐款 与 六年级 捐款 的 比 是 7 ： 8 ， 六年级 捐款 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7684", "content": "一 箱 奶 24 瓶 ， 每瓶 2 元 ， 5 箱 奶 共 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6718", "content": "实验 小学 4 、 五年级 各 有 4 个 班 的 学生 参加 了 “ 爱 我 家乡 ， 绿化 家乡 ” 活动 ． 五年级 每班 植树 45 棵 ， 四年级 每班 植树 35 棵 ． 两个 年级 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1299", "content": "新星 小学 三年级 有 4 个 班 ， 平均 每人 捐 3 元 ， 共 捐款 576 元 ， 平均 每班 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5813", "content": "李 霞 带 260 元 钱 ， 吴 敏 带 了 170 元 钱 ， 在 某 商场 两 人 将 钱 合在一起 ， 正好 买 2 件 相同 的 衣服 ， 吴 敏 应该 还 李 霞 多少 钱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4972", "content": "一 堆 煤 ， 每天 烧 12.4 吨 ， 可以 烧 25 天 ， 如果 每天 烧 10 吨 ， 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8957", "content": "将 (4/5) m 的 丝带 剪成 同样 长 的 8 段 ， 每 段 丝带 长 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12385", "content": "六年级 评出 特长 之 星 75 人 ， 其中 (3/5) 是 女生 ， 特长 之 星 中 的 男生 有 几 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9525", "content": "文艺 书 的 (3/10) ， 正好 等于 故事书 的 (3/4) ， 已知 故事书 有 36 本 ， 文艺 书 有 多少 本 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19206", "content": "一 批 零件 ， 如果 由 24 个 工人 制作 ， 要 40 天 完成 ， 如果 增加 6 名 工人 ， 多少 天 可以 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14371", "content": "一 列 火车 的 第 10 号 车厢 原有 116 人 ， 到 某 站 后 ， 有 58 人 下车 ， 有 45 人 上 本 ． 再 开车 时 ， 这 节车厢 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8380", "content": "黄河 农场 要 收割 715 公顷 小麦 ， 前 3 天 收割 了 195 公顷 ， 还 剩 多少 公顷 ？ 如果 照 这样 的 速度 计算 ， 收割 完 剩下 的 小麦 ， 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6389", "content": "张 伯伯 有 240 千克 西瓜 ， 上午 卖 了 36 千克 ， 下午 卖 了 45 千克 ， 一共 卖 了 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9609", "content": "一 个 标价 为 40 元 的 商品 按 标价 的 0.9 出售 后 仍 可 获利 20% ， 则 该 商品 的 进价 为 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19048", "content": "一 块 长方形 地 ， 宽 120 米 ， 长 比 宽 多 (1/3) ． 这块 地 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2912", "content": "某地 新建 一条 公路 ， 全长 800 米 ， 已 建 好 320 米 ， 未 建 的 占 全长 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1309", "content": "一 个数 的 (1/5) 是 (1/2) ， 它 的 25% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15138", "content": "一 根 电线 全长 32 米 ， 第一次 用 去 了 全长 的 20% ， 第 二 次 用 去 了 全长 的 (1/2) ． 两次 共用 去 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1102", "content": "一 袋 面粉 42 元 ， 买 5 袋 送 2 袋 ， 算 一 算 每 袋 便宜 了 多少 钱 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21745", "content": "甲 数 是 40 ， 比 乙 数 的 (2/3) 少 18 ， 乙 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6242", "content": "学校 美术组 人数 的 (5/6) 正好 与 科技 组 人数 的 (5/8) 相等 ． 已知 美术组 有 24 人 ． 科技 组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13219", "content": "某校 六年级 体育 达标 人数 120 人 ， 占 六年级 人数 的 (4/5) ， 未达标 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14086", "content": "寒假 里 妈妈 带 我 坐飞机 到 北京 玩 ， 飞机 平均 每 小时 飞行 的 速度 是 680 千米 ， 飞 了 差不多 3 个 小时 ． 你 能 算 出 我们 到 北京 的 飞行 里程 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3956", "content": "果园 有 梨树 142 棵 ， 苹果树 是 梨树 的 12 倍 ， 苹果树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16205", "content": "一 台 冰箱 原价 4500 元 ， 现 0.8 出售 ， 现价 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8338", "content": "修路 队 第一天 修路 453 米 ， 第 二 天 修 的 路 比 第一天 的 3 倍 少 405 米 ， 两天 一共 修 了 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11110", "content": "一 个数 的 (7/8) 是 28 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2965", "content": "一 种 圆珠笔 原价 每支 4.8 元 ， 降价 后 每支 便宜 0.3 元 ， 原来 买 195 支 笔 的 钱 ， 现在 可以 买 多少 支 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4439", "content": "育才 小学 有 学生 650 人 ， 其中 有 96% 的 学生 入 了 保险 ， 没有 入 保险 的 学生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4093", "content": "一 列 火车 从 上海 开往 天津 ， 行 了 全程 的 60% ， 还 剩 540 千米 ， 上海 到 天津 铁路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19550", "content": "甲 、 乙 两辆 汽车 同时 从 相距 375 千米 的 a 、 b 两地 相向 开出 ， 甲 车 每 小时 行 70 千米 ， 乙 车 每 小时 比 甲 车 多行 10 千米 ． 两车 开出 后 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17954", "content": "除数 和 商都 是 0.8 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8672", "content": "小 红 看 一 本书 ， 全书 共 132 页 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 全书 的 (1/3) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21465", "content": "某 车间 生产 一批 零件 ， 平均 每天 生产 372 个 ， 生产 了 6 天 后 ， 还有 150 个 没有 生产 ． 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19044", "content": "仓库 里 堆放 着 3000 吨 货物 ， 运走 了 15% ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3207", "content": "国庆节 优惠酬宾 活动 中 ， 某 电器城 0.95 出售 一台 微波炉 ， 原价 1800 元 ， 现价 比 原价 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9586", "content": "粮店 有 大米 63 袋 ， 比 白面 多 28 袋 ． 大米 袋 数 是 黄豆 的 7 倍 ． 白面 与 黄豆 一共 有 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1997", "content": "小 华 看 一 本书 ， 每天 看 16 页 ， 5 天 后 还 剩 全书 的 (3/5) 没 看 这 本书 = 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21089", "content": "一 个 汽油桶 最 多 能 装 汽油 6.5 千克 ， 要 装 455 千克 汽油 ， 最少 需要 多少 个 这样 的 汽油桶 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18025", "content": "李 叔叔 原来 体重 80 千克 ， 坚持 体育锻炼 后 ， 体重减轻 了 (1/5) ， 现在 李 叔叔 体重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11510", "content": "2 个 (5/6) 相加 的 和 比 它们 的 积 多 多少 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5558", "content": "水果店 运 来 苹果 的 重量 是 梨 的 3 倍 ， 苹果 比 梨 多 160 千克 ， 运 来 梨 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8461", "content": "粮店 运进 大米 、 面粉 各 50 袋 ， 每 袋 大米 90 千克 ， 每 袋 面粉 25 千克 ， 运进 的 大米 比 面粉 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3875", "content": "除数 是 商 的 16 倍 ， 除数 是 80 ， 被除数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10628", "content": "(2/3) * (5/7) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13739", "content": "某 食品厂 引进 现代化 生产线 后 ， 平均 每 小时 可 生产 饼干 2400 盒 ， 比 原来 的 3 倍 少 450 盒 ． 原来 平均 每 小时 生产 多少 盒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4518", "content": "小 红 家 有 一些 大米 和 面粉 ， 面粉 吃 了 20 kg ， 爸爸 说 ： “ 大米 已经 吃 了 (1/5) ” 妈妈 说 ： “ 如果 再 买进 30 kg 大米 ， 就 和 原来 大米 一样 多 ． ” 小 红 家 原来 有 多少 千克 大米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9199", "content": "妈妈 给 王 丽 买 了 1 瓶 “ 成长 快乐 ” 补充 能量 ， 共 240 片 ， 每天 吃 3 次 ， 每次 吃 2 片 ， 这 瓶 “ 成长 快乐 ” 能 吃 几天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3577", "content": "实验 小学 科技 组 人数 是 美术组 的 (8/9) ， 科技 组 人数 是 体育组 的 (4/5) ， 美术组 有 72 人 ， 体育组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1569", "content": "五年级 同学 参加 课间操 比赛 ， 每队 18 人 ， 可以 站 15 行 ， 现 改为 9 行 ， 每队 应 站 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11967", "content": "大华 机械厂 原 计划 每天 生产 75 台 机床 ， 30 天 可以 完成 任务 ， 实际 每天 生产 的 台数 比 原 计划 多 (1/3) ． 几天 就 完成 了 原 计划 的 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11084", "content": "小 明 要 买 不同 档次 的 文具盒 ． 高档 的 5 个 ， 中档 的 占 总数 的 75% ， 低档 的 占 总数 的 (1/6) ． 你 知道 小 明 一共 要 买 多少 个 文具盒 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10938", "content": "一 个 因数 是 8 ， 另 一个 因数 是 7 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22362", "content": "一 个数 的 6 倍 + 4 个 0.8 的 和 是 36.2 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8747", "content": "一 个 长方体 形 的 无 上 、 下 底面 的 纸盒 ， 若 沿着 高 剪开 后 是 一个 边长 为 3 厘米 的 正方形 ． 那么 原来 长方体 纸盒 的 表面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3315", "content": "栽 一种 树苗 ， 成活率 为 94% ， 为 保证 栽 活 470 棵 ， 至少 要 栽 树苗 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19910", "content": "一 件 上衣 降价 20% 后 ， 售价 380 元 ， 问 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17030", "content": "某 粮食 加工厂 准备 运出 一批 大米 ， 已经 装满 42 袋 ， 每 袋 50 千克 ， 还 剩 1600 千克 ． 要 运出 的 这 批 大米 一共 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17206", "content": "一 本 故事书 原价 20 元 ， 现在 每 本 按 原价 打 0.9 出售 ． 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "389", "content": "王奶奶 家 上 月 用电 48 度 ， 这个 月 比 上个月 节约用电 (1/8) ， 这个 月 节约用电 多少度 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3947", "content": "今天 是 爷爷 60 岁 大寿 ． 明明 准备 了 很多 鲜花 ， 他 准备 把 这些 鲜花 送给 爷爷 、 奶奶 、 爸爸 和 妈妈 ． 明明 将 全部 的 (1/3) 献给 了 爷爷 ， 祝 爷爷 寿辰 快乐 ； 将 全部 的 25% 献给 了 奶奶 ， 祝 奶奶 寿比南山 ； 将 全部 的 (1/5) 献给 了 爸爸 ， 祝 爸爸 事业 顺利 ； 将 全部 的 (1/6) 献给 了 妈妈 ， 祝 妈妈 身体健康 ； 最后 剩下 6 朵 鲜花 ， 明明 把 它 留给 了 自己 ， 祝 自己 越来越 聪明 ， 学习 进步 ! 多 好 的 祝福 啊 ! 请 你 算 一下 明明 准备 了 多少 朵花 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1055", "content": "星期天 ， 9 名 同学 去 动物园 参观 ， 共 付 门票费 45 元 ， 每人 乘车 用 3 元 ， 平均 每人 花 了 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11391", "content": "一 堆 煤 ， 第一次 用 去 40% ， 第 二 次 用 去 原来 总量 的 (1/4) ， 还 剩余 14 吨 ． 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4820", "content": "某 工程队 前 5 天 共 修路 64 千米 ， 后 7 天 每天 修 14 米 ， 这个 修路 队 平均 每天 修路 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12517", "content": "某种 商品 原来 售价 50 元 ， 调价 后 售价 是 56 元 ． 这种 商品 的 价格 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18543", "content": "某种 产品 ， 原来 成本 是 150 元 ， 技术 改革 后 ， 现在 成本 降低 了 18% ， 现在 的 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15671", "content": "农场 有 牛 280 头 ， 猪 的 头数 是 牛 的 (2/5) ， 又 是 羊 的 70% ， 农场 养羊 多少 只 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2294", "content": "有 一块 布料 ， 做 上衣 用 去 (7/8) 米 ， 做 裤子 用 去 (3/4) 米 ， 还 剩 (1/2) 米 ， 这块 布料 一共 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1639", "content": "小兔 摘 了 136 个 果子 ， 小猪 摘 的 个数 和 小兔 同样 多 ， 小 猴 摘 了 97 个 ， 它们 一共 摘 了 多少 个 果子 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20554", "content": "少年宫 乐队 有 女同学 18 人 ， 男同学 17 人 ． 合唱队 的 人数 是 乐队 的 3 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17911", "content": "小 明 读 一 本书 ， 第一天 读 了 全书 的 20% ， 第 二 天 读 了 全书 的 25% ， 还 剩 33 页 没有 读完 ， 这 本书 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23033", "content": "一 个数 的 (4/25) 是 28 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16359", "content": "校 运动会 上 ， 参加 跳高 比赛 的 有 26 人 ， 参加 跑步 的 人数 比 参加 跳高 的 3 倍 多 10 人 ， 参加 跑步 比赛 的 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15221", "content": "水果店 运进 苹果 和 梨 各 15 箱 ， 已知 苹果 每箱 23.5 元 ， 梨 每箱 20.8 元 ． 这些 水果 共 要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17671", "content": "每 双 溜冰鞋 36.2 元 ， 每 只 呼拉圈 3.8 元 ． 学校 花 624.4 元 买 了 12 双 溜冰鞋 ， 还 可以 买 多少 只 呼拉圈 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11219", "content": "奥运会 铁人 3 项 比赛 长跑 距离 为 10 千米 ， 是 骑 自行车 距离 的 (1/4) ， 游泳 距离 是 自行车 的 (3/80) ， 游泳 距离 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18614", "content": "春季 运动会 就要 到 了 ， 学校 鼓号 队 将 进行 表演 ． 为了 演出 需要 ， 学校 为 鼓号 队 的 36 名 学生 每人 购买 一套 演出 服装 ． 最后 选中 的 上衣 每件 64 元 ， 裤子 每 条 56 元 ， 这样 学校 购买 服装 共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21101", "content": "60 千克 的 (5/12) = 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16450", "content": "一 袋 大米 的 (3/4) 正好 是 75 千克 ， 这 袋 大米 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7482", "content": "用 200 粒 种子 做 发芽 实验 ， 发芽率 是 98% ， 有 多少 粒 种子 没有 发芽 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5760", "content": "两个 因数 的 积 是 24.6 ， 其中 一个 因数 是 6 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9086", "content": "计算 ： 63 / 17 * 51 / 24 * 72 / 21 = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17870", "content": "畜牧场 养猪 800 头 ， 比 牛 的 头数 多 60% ， 猪 比 牛 多 多少 头 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22845", "content": "一 个数 减去 385 ， 差 是 273 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20100", "content": "13 与 2.1 / 3.5 的 商 相加 ， 再 乘以 (1/5) ． 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8268", "content": "农田 里 有 白菜 370 棵 ， 青菜 的 棵 数 是 白菜 的 (4/5) ． 农田 里 有 多少 棵 青菜 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8770", "content": "一 辆 汽车 已 行 了 75 千米 ， 还 剩下 25 千米 ， 这辆 汽车 已 行 了 全部 路程 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1979", "content": "万 德隆 超市 今天 卖出 15 台 电脑 ， 9 台 电视机 ． 卖出 的 电视机 是 电脑 台数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19189", "content": "龟 兔 准备 进行 第 二 次 赛跑 ， 兔子 让 乌龟 先 跑 1000 米 后 再 跑 ， 如果 兔子 每分钟 跑 35 米 ， 乌龟 每分钟 跑 10 米 ， 兔子 跑 几分钟 后 就 能 追 上 乌龟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8048", "content": "炼钢厂 在 一 星期 的 前 4 天 共 炼钢 0.72 万吨 ， 后 3 天 平均 每天 炼钢 0.25 万吨 ， 这 一 星期 平均 每天 炼钢 多少 万吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "261", "content": "一 只 钢笔 的 原价 是 20 元 ， 0.9 后 的 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3097", "content": "把 一个 长 、 宽 分别 是 15 厘米 和 10 厘米 的 长方形 ， 拉 成 一个 一条 高 为 12 厘米 的 平行四边形 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18884", "content": "一 箱 鸡蛋 重 25 千克 ， 一箱 鸭蛋 重 30 千克 ， 商店 购进 鸡蛋 、 鸭蛋 各 20 箱 ， 购进 鸡 、 鸭蛋 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3170", "content": "一 种 商品 打 0.7 后 售价 70 元 ． 这种 商品 现价 比 原价 便宜 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10074", "content": "在 校园 里 种 了 一排 树 ， 从 起点 到 终点 共有 11 棵 ， 每 两棵树 之间 都 相距 5 米 ． 校园 里 这 条 路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19602", "content": "一 件 上衣 降价 10% 后 卖 108 元 ， 这件 衣服 原价 是 _ _ _ _ _ _ _ _ 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11757", "content": "一 种 小汽车 的 速度 是 飞机 的 (1/15) ， 小汽车 速度 是 140 千米 / 小时 ， 飞机 的 速度 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15160", "content": "李 叔叔 汽车 邮箱 里 有 18.5 升 汽油 ， 每 升 汽油 可 行驶 6.4 千米 ， 李 叔叔 到 外地 办事 往返 路程 200 千米 ， 至少 忘 邮箱 里 加入 多少 升 汽油 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14446", "content": "中 、 高年级 同学 听 科学家 作 报告 中年级 有 84 人 参加 ， 高年级 参加 的 人数 是 中年级 的 3 倍 ． 听 报告 的 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9519", "content": "把 7 支 红 铅笔 和 3 支 蓝 铅笔 放在 一个包 里 ， 让 你 任意 摸 出 1 支 铅笔 ， 摸 出 的 铅笔 是 红 铅笔 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19310", "content": "1 只 鹅 可以 换 8 千克 鱼 ， 而 4 千克 鱼 可以 换 50 个 鸡蛋 ， 10 个 鸡蛋 可以 换 3 个 鹅蛋 ． 一只 鹅 可以 换 多少 个 鹅蛋 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9799", "content": "一 个数 除 8 ， 结果 是 0.5 ， 那么 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21738", "content": "一 种 衣服 现在 打 0.9 出售 ， 现在 售价 是 45 元 ， 每件 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17166", "content": "同学 们 为 班级 图书 角 捐书 ， 故事书 有 126 本 ， 文艺 书 是 故事书 的 (5/6) ， 科技 书 比 文艺 书 多 (1/3) ， 捐 的 科技 书 比 文艺 书 多 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22269", "content": "李 明 每月 收入 1900 元 ， 按规定 应 缴纳 8% 的 个人所得税 ， 李 明 实际 月 收入 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12287", "content": "华丰 农场 今年 小麦 播种面积 是 259.2 公顷 ， 比 去年 增加 了 8% ． 去年 小麦 播种面积 = 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13893", "content": "一 套 服装 原来 成本 160 元 ， 由于 技术创新 ， 成本 降低 20% ． 现在 每套 成本 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20371", "content": "在 第 29 届 北京 奥运会 上 ， 俄罗斯队 共 获得 奖牌 72 枚 ， 是 中国队 的 (18/25) ， 而 美国队 获得 的 奖牌数 是 中国队 的 (11/10) 倍 ． 美国队 共 获得 奖牌 多少 枚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21953", "content": "同学 们 植树 ， 挖坑 的 人数 除以 5 ， 再 加上 6 ， 正好 是 浇水 的 人数 ， 浇水 的 有 18 人 ． 挖坑 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17137", "content": "树上 原来 有 38 只 鸟 ， 飞 走 了 12 只 ， 树上 还有 多少 只 鸟 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17367", "content": "一 座 铁路桥 长 4620.8 米 ， 一列 火车 长 160 米 ， 火车 的 速度 是 每秒 30 米 ， 这 列 火车 从 车 头上 桥 到 车尾 离开 桥 需要 多长时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2777", "content": "5 （ 1 ） 班 有 男生 27 人 ， 比 女生 多 5 人 ， 男生 人数 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8493", "content": "今年 产量比 去年 增长 (1/6) ， 把 多少 看做 单位 “ 1 ” ， 今年 产量 是 去年 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16546", "content": "小胖 买 了 4 支 铅笔 和 7 本 练习本 共 付 5.8 元 ， 如果 每支 铅笔 为 0.4 元 ， 那么 每 本 练习本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17941", "content": "一 列 火车 以 每 小时 120.5 千米 的 速度 从 上海 开往 南京 ， 行驶 2.4 小时 后 还 剩下 15.8 千米 ． 上海 到 南京 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16022", "content": "小林 读 一本 494 页 的 故事书 ， 每天 读 13 页 ， 现在 还 剩 351 页 ， 小林 已经 读 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18001", "content": "食堂 有 一批 煤 ， 如果 用 去 这 批 煤 的 45% ， 剩下 的 比 用 去 的 多 200 千克 ， 那么 食堂 原来 有 煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20594", "content": "李 明 今年 身高 是 164 厘米 ， 比 去年 长 高 了 4 厘米 ， 今年 比 去年 长 高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12714", "content": "某 自行车厂 上半年 计划 生产 童车 36000 辆 ， 已经 生产 了 (2/5) ． 还要 生产 多少 辆 才能 完成 计划 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22850", "content": "一 辆 公交车 上 有 30 人 ， 到 和平 商场 时 ， 有 (2/15) 的 人 下车 ， 又 有 17 人 上车 ， 这时 车上 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15279", "content": "一 台 压路机 的 前轮 是 圆柱形 ， 轮 宽 2 m ， 直径 1.6 m ． 前轮 转动 两周 ， 前进 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1659", "content": "比 50 千克 多 (1/10) = 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4689", "content": "粮店 运 来 (3/4) 吨 大米 ， 运 来 的 面粉 是 大米 的 (2/5) ． 粮店 运 来 面粉 和 大米 一共 有 多少 吨 ？ ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4896", "content": "粮店 运进 大米 、 面粉 各 20 袋 ， 每 袋 大米 90 千克 ， 每 袋 面粉 25 千克 ， 运进 的 大米 比 面粉 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6960", "content": "学校 粉刷 墙壁 需要 10 天 完成 ， 平均 每天 完成 这项 工程 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16087", "content": "口袋 里 只有 3 个 红球 ， 任意 摸 1 个 ， 要 使 摸 出 红球 的 可能性 为 (1/5) ， 还要 往 口袋 里 放 多少 个 其它 颜色 的 球 ． （ 球 的 形状 、 大小 、 重量 均 相同 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7339", "content": "池 中 的 睡莲 所 遮盖 的 面积 每天 扩大 一倍 ， 40 天 正好 遮住 整个 水面 ， 问 遮住 水面 的 一半 需要 多少 天 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7388", "content": "从 甲地 到 乙地 ， 上坡路 占 (7/18) ， 平坦 路 占 (4/9) ， 下坡路 占 (1/6) ， 一辆 汽车 往返 一趟 ， 下坡路 共 走 了 20 千米 ． 甲乙 两地 之间 的 路程 的 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21610", "content": "青 云岭 小学 四年级 3 个 班 的 同学 在 山坡 上 植树 384 棵 ， 每个 班 都 是 32 人 ， 平均 每人 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2341", "content": "轴承厂 计划 加工 1800 个 轴承 ， 头 7 个 小时 加工 了 840 个 ， 照 这样 计算 ， 完成 这 批 任务 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19247", "content": "按规定 ， 酒店 每月 要 缴纳 5% 营业税 ， 还要 按 营业税 的 7% 缴纳 城市 维护 建设 税 ． 好 再 来 酒店 今年 一月份 缴纳 城市 维护 建设 税 0.63 万元 ， 好 再 来 酒店 今年 一月份 的 营业额 = 多少 万元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20880", "content": "一 批 水泥 ， 运出 总数 的 (5/8) 后 ， 又 运进 70 吨 ， 现在 水泥 数量 正好 是 原 重量 的 62.5% ， 这 批 水泥 原 重 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2609", "content": "河边 有 140 人 要 过河 ， 一只 渡船 每次 限 载 17 人 ， 渡 了 5 次 后 ， 还有 多少 人 没有 过河 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6024", "content": "小 明 有 3000 元 压岁钱 ， 打算 把 其中 的 10% 给 爸爸妈妈 买 礼物 ， 把 其中 的 15% 给 爷爷奶奶 买 礼物 ， 小 明 买 礼物 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14648", "content": "鸵鸟 4 小时 跑 216 千米 ， 猎豹 每 小时 跑 109.6 千米 ， 猎豹 每 小时 比 鸵鸟 多 跑 几千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1984", "content": "芳 芳 从 家 到 新华书店 ， 每 小时 走 4.8 千米 ， 0.5 小时 可以 到达 ， 芳 芳 家 到 新华书店 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5828", "content": "一 列 货运 火车 有 9 节车厢 ， 每 节车厢 载 50 吨 煤 ， 如果 照 这样 运 7 次 ， 一共 可以 运 多少 吨 煤 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2861", "content": "(8/25) / [ （ (53/12) - (85/24) ） * (4/7) + （ (55/18) - (31/12) ） / (17/27) ] = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "13775", "content": "水果店 售出 2 筐 橙子 ， 每 筐 24 千克 ， 占 售出 水果 总数 的 (6/11) ， 售出 的 香蕉 比 售出 水果 总数 少 (3/4) ． 商店 售出 香蕉 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8899", "content": "一 个 摩天轮 转 起来 ， 最高点 和 最低点 之间 的 距离 是 10 米 ， 坐 这个 摩天轮 转 一圈 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18915", "content": "世界 上 最 轻 的 鸟 是 蜂鸟 ． 一只 应 麻雀 的 体重 是 81 克 ， 比 蜂鸟 的 50 倍 少 19 克 ， 一只 蜂鸟 重 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12044", "content": "果园 有 桃树 120 棵 ， 梨树 是 桃树 的 (5/8) ， 杏树 是 梨树 的 (3/5) ， 杏树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8207", "content": "20 吨 煤 ， 用 去 (4/5) ， 用 去 多少 吨 煤 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22910", "content": "一 种 农具 ， 现在 每 台 售价 24 元 ， 比 原来 每 台 售价 上涨 了 20% ， 原来 每 台 售价 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6278", "content": "全班 有 56 人 ， 男生 比 女生 少 25% ， 女生 有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15987", "content": "姐姐 用 两条 长度 分别 是 1.26 和 0.95 米 的 彩 带来 包装 礼物 ， 接口处 共用 去 绳子 0.11 米 ， 接 好 后 的 绳子 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10659", "content": "修 一条 公路 ， 长 1000 米 ， 甲队 已经 修 了 这 条 路 的 (2/5) ， 剩下 的 由 乙 队 修 ， 乙 队 修 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18345", "content": "小 红 帮 妈妈 打 一份 稿件 ， 先 打 了 这份 稿件 的 (1/4) ， 又 打 了 这份 稿件 的 (2/5) ． 还 剩 这份 稿件 的 几分 之 几 没 打 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21731", "content": "小 马虎 在 做 一道 加法 题 时 ， 把 第 二 个 加数 135 看成 531 ， 结果 算 出来 的 和 是 716 ， 你 知道 正确 的 得数 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9823", "content": "在 比例 中 ， 两个 内 项 的 积 是 (5/12) ， 其中 一个 外 项 是 (3/4) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7835", "content": "一 桶 油 ， 用 去 25% ， 还 剩 21 千克 ， 用 去 了 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6668", "content": "学校 买来 故事书 128 本 ， 科技 书 112 本 ， 把 这些 书 分给 6 个 班 ， 平均 每个 班 分 得 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20988", "content": "水果 站 运回 一批 水果 ， 已知 梨 、 苹果 、 香蕉 的 重量 比 为 5 ： 3 ： 2 ， 其中 香蕉 有 120 千克 ， 这 批 水果 共 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17364", "content": "一 家 酒店 在 圣诞节 和 元旦 期间 的 营业额 为 4.8 万元 ． 如果 按 营业额 的 5% 缴纳 营业税 ． 这家 酒店 除去 营业税 后 的 收入 = 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17523", "content": "小 红 参加 唱歌 比赛 ， 她 和 参赛 的 小 选手 每个 人 握 1 次 手 ， 一共 握 了 6 次 ， 参加 唱歌 比赛 一共 有 多少 人 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5712", "content": "刘 莉 买 了 2000 元 的 国家 建设 债券 定期 2 年 ， 如果 年利率 为 2.7% ， 到期 她 可 获 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6393", "content": "两个 因数 的 积 是 12.5 ， 如果 一个 因数 扩大 到 原来 的 16 倍 ， 另 一个 因数 缩小 到 原来 的 (1/8) ， 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4178", "content": "甲乙 两地 相距 378 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 去 时 用 了 4 小时 ， 返回 用 了 4.5 小时 ， 去 时 比 返回 时 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "367", "content": "一 辆 汽车 行驶 225 千米 消耗 30 升 汽油 ． 照 这样 计算 ， 行驶 720 千米 ， 需要 汽油 多少 升 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8233", "content": "小 奥 有 8 个 弹球 ， 小林 的 弹球 是 小 奥 的 3 倍 少 1 个 ， 小林 的 弹球 = 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11177", "content": "姐姐 和 弟弟 共 给 “ 希望工程 ” 捐款 300 元 ， 其中 姐姐 和 弟弟 捐款 钱 数 的 比 是 2 ： 3 ． 姐姐 比 弟弟 少 捐款 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2556", "content": "球 从 高处 自由 下落 ， 每次 接触 地面 后 弹起 的 高度 是 前次 下落 高度 的 (2/5) ． 如果 球 下落 第 二 次 弹起 的 高度 是 5.6 米 ， 那么 球 是从 多少 米 的 高处 落下 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3345", "content": "某市 参加 数学 奥林匹克 夏令营 活动 的 共有 300 人 ， 李 想 也 是 其中 一员 ， 现在 要 从中 选拔 10 人 参加 比赛 ， 那么 李 想 被 选中 的 可能性 为 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "994", "content": "李老师 领取 一笔 3000 元 稿费 ， 按规定 扣除 2000 元 后 要 按 5% 缴纳 个人所得税 ， 李老师 实际 得到 稿费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12029", "content": "一 个 长方体 的 体积 是 54 立方分米 ， 底 面积 是 15 平方分米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3042", "content": "一 张 课桌 的 价钱 是 120 元 ， 相当于 3 把 椅子 的 价钱 ， 学校 新 添置 了 20 把 椅子 ， 买 椅子 共 花 去 了 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3270", "content": "4.5 + 8.4 / 21 的 商 ， 所得 的 和 再 乘 1.5 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6121", "content": "如果 把 一根 木料 锯 成 4 段 要 用 12 分 ， 那么 用 同样 的 速度 把 这根 木料 锯 成 5 段 ， 要 用 多少 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11515", "content": "(3/4) * (2/7) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2795", "content": "一 种 大豆 每千克 含油 (4/25) 千克 ， (5/8) 千克 这样 的 大豆 含油 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "751", "content": "收 废品 活动 中 ， 五年级 收集 废纸 56 千克 ， 是 六年级 的 (7/8) ， 四年级 又 是 六年级 的 (7/10) ， 四年级 收集 废纸 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19302", "content": "甲 、 乙 两地 相距 720 千米 ， 一辆 汽车 从 甲地 开往 乙地 需要 9 小时 ， 如果 要求 汽车 提前 1 小时 到达 乙地 ． 汽车 平均速度 应 提高 多少 千米 / 时 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21957", "content": "公园 里 有 个 圆形 花坛 ， 周长 180 米 ． 在 花坛 的 4 周 ， 每隔 4 米 种 1 棵 冬青树 ， 一共 可以 种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7421", "content": "修 一条 长 4800 米 的 公路 ， 计划 每天 修 600 米 ， 几天 可以 修 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15330", "content": "有 一根 长 6 米 的 绳子 ， 截 成 每 段长 (3/4) 米 ， 可以 截 成 几段 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4921", "content": "一 根 电线 剪掉 42% 以后 ， 余下 的 剪掉 的 长 1.6 米 ， 这根 电线 全长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7497", "content": "水果 超市 原有 西瓜 3400 千克 ， 卖出 3000 千克 后 ， 又 运 来 5000 千克 ． 现在 有 西瓜 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "965", "content": "2012 年 伦敦 奥运会 的 奖牌 重量 为 400 克 ， 其中 金牌 是 金 、 银 混合 制作 （ 金 镀在 表面 ） ， 金 占 总重量 的 (3/40) ， 请 根据 分数 的 意义 算 一 算 ： 一枚 金牌 中 有 多少 克 金 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2287", "content": "8 只 蜜蜂 6 小时 采 蜜 768 克 ， 一只 蜜蜂 一 小时 采 蜜 多少 克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18299", "content": "六年级 （ 1 ） 班 共有 22 名 男同学 和 24 名 女同学 ， 那么 男同学 占 全班 人数 的 多少 （ 用 最 简分数 表示 ） ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12428", "content": "小 红 妈妈 削 了 一支 甘蔗 ， 小 红 发现 削 好 的 甘蔗 比 原来 的 短 了 不少 ， 就 问 妈妈 是 怎么回事 ， 妈妈 告诉 小 红 ， 甘蔗 顶部 的 0.3 米 和 底部 的 0.2 米 去掉 了 ， 只 剩下 中间 的 1.6 米 了 ， 你 知道 甘蔗 原来 的 长度 = ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6690", "content": "5 （ 1 ） 班 有 50 名 学生 ， 其中 24 名 男生 ， 女生 占 全班 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12350", "content": "一 袋 水泥 ， 用 去 40% ， 剩下 的 部分 比 用 去 的 多 10 千克 ， 用 去 了 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6651", "content": "某 路桥 工程 公司 修 一条 公路 ， 第一次 修 了 全长 的 (2/5) ， 第 二 次 修 了 20 km ， 两次 共 修 了 全长 的 (3/5) ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1820", "content": "一 件 女 衣 打 0.8 出售 需要 160 元 ， 如果 打 0.7 出售 ， 只 需要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13624", "content": "一 台 vcd 原来 的 售价 是 900 元 ． 现在 降价 (1/4) ， 现在 每 台 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7387", "content": "修路 队 要 修 一条 路 ， 第一天 修 了 860 米 ， 第 二 天 修 了 685 米 ， 两天 一共 修 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5882", "content": "冬冬 骑车到 姥姥家 ， 每 小时 行 12 千米 ， 行 了 2 小时 ， 回家 按 原 路 返回 只要 1 小时 ， 冬冬 这次 到 姥姥家 来回 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9834", "content": "李老师 给 全校 15 个 班级 分发 练习本 ， 每个 班 分 150 本 ， 还 剩 40 本 做 为 备用 ． 学校 一共 买来 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17207", "content": "某 水泥厂 在 一 星期 里 ， 前 3 天 共 生产 水泥 0.48 万吨 ， 后 4 天 共 生产 水泥 0.78 万吨 ． 这 一 星期 平均 每天 生产 水泥 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3709", "content": "一 个 制作 陶瓷 小狗 的 工厂 ， 用 一个 泥坯 可以 做成 一只 小狗 ， 但 做成 小狗 时 要 抠 下 一些 泥块 ， 每 6 个 泥坯 做成 小狗 所 抠 下来 的 泥块 ， 又 够 做 一只 小狗 的 泥坯 ， 现有 36 个 这样 的 泥坯 ， 可以 制作 多少 只 小狗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10195", "content": "一 个数 的 (3/5) 比 它 的 (2/5) 多 2 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20002", "content": "一 台 电视机 每 小时 耗电 (3/20) 千瓦时 ， 张 奶奶家 平均 每天 收看 4 小时 ， 她家 电视机 平均 每天 耗电 多少 千瓦时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6987", "content": "学校 买来 800 本 练习本 ， 其中 的 (1/5) 分给 六年级 4 个 班 ， 平均 每个 班 分 到 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6490", "content": "某 小学 学生 中 37.5% 是 男生 ， 男生 比 女生 少 328 人 ， 该 小学 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9269", "content": "妹妹 今年 12 岁 ， 是 哥哥 的 年龄 的 (2/3) ， 哥哥 今年 多少岁 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10196", "content": "长寿 村 去年 植树 198 棵 ， 今年 植树 的 棵 树 是 去年 的 5 倍 ， 长寿 村 去年 和 今年 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13736", "content": "园林绿化 队 要 栽 一批 树苗 ， 第一天 栽 了 总数 的 15% ， 第 二 天 栽 了 76 棵 ， 这时 剩下 的 与 已 栽 的 棵 数 的 比 是 3 ： 5 ． 这 批 树苗 一共 有 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "346", "content": "菜场 运 来 一批 黄瓜 ， 每 筐 装 20 千克 ， 要 装 50 筐 ， 现在 每 筐 装 25 千克 ， 要 装 多少 筐 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23034", "content": "一 个 梯形 的 上 底 是 1.8 分 米 ， 下 底 是 2 分 米 ， 高 是 0.5 分 米 ， 它 的 面积 = 多少 平方分米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9113", "content": "四年级 同学 要 种 740 棵 树 ， 已经 种 下 了 540 棵 ． 如果 每 小时 种 50 棵 树 ， 还 需 几小时 种 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19738", "content": "0.85 / 0.2 的 商 是 4 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1432", "content": "一 本 故事书 有 350 页 ， 小 明 已经 看 了 100 页 ， 还 剩 几页 没 看 完 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11495", "content": "李 阿姨 批发 回 了 33 箱 同样 的 服装 ， 每箱 10 件 ， 每件 78 元 ， 如果 按 零售 每件 96 元 全部 售完 ， 她 能 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4508", "content": "一 辆 客车 从 甲 站 开出 时 刚好 满座 ， 到达 乙 站 时 ， 有 (1/4) 的 乘客 下车 ， 又 有 15 人 上车 ， 这时 车上 还有 3 个 空位 ． 这时 车上 有 乘客 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22805", "content": "甲 城 到 乙 城 的 飞机票 全价 是 1600 元 ， 晚上 的 票价 打 0.6 优惠 ， 晚上 的 票价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5819", "content": "把 一根 长 (9/11) 米 的 钢管 锯 成 若干 相等 的 小 段 ， 一共 锯 了 3 次 ， 每 段 钢管 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19296", "content": "食堂 运 来 一批 大米 ， 用 去 其中 的 (3/5) ， 还 剩 240 千克 ， 原来 运 来 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5380", "content": "有 一箱 苹果 ． 卖 去 20 千克 ， 正好 占 全 箱 质量 的 (4/5) ． 这 箱 苹果 原来 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11540", "content": "王 叔叔 长期 从事 科研工作 ， 去年 他 的 科研成果 获奖 ， 得到 奖金 10 万元 ． 按照 规定 ， 王 叔叔 要 缴纳 20% 的 个人所得税 ． 王 叔叔 实际 得到 奖金 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6879", "content": "把 (3/5) 米 长 的 绳子 平均 分成 4 段 ， 每 段 绳子 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5554", "content": "动物园 里 的 一头 大象 每天 吃 175 千克 食物 ， 一只 熊猫 3 天 吃 105 千克 食物 ． 一头 大象 每天 吃 的 食物 是 一只 熊猫 每天 所 吃 食物 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4551", "content": "小 李家 买 了 40 盆花 ， 每 盆 15 元 ， 买 树 又 用 去 200 元 ， 一 共用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10615", "content": "3 台 收割机 (1/6) 小时 收割 玉米 (7/3) 亩 ， 平均 每 台 收割机 每 小时 收割 几亩 地 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23045", "content": "仓库 里 有 一批 大米 ， 第一天 运出 全部 大米 的 一半 少 2 吨 ， 第 二 天 运出 余下 的 一半多 3 吨 ， 这时 仓库 里 还 剩下 12 吨 ， 仓库 里 原有 大米 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "16094", "content": "树上 拴着 一只 羊 ， 拴 羊 的 绳子 长 2 米 ， 羊 的 周围 全 是 草 ， 羊 能 吃 到 最 多 的 草 的 面积 = 多少 平方米 ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "15896", "content": "商场 进 了 一批 电脑 ， 卖出 72 台 ， 卖出 的 与 剩下 的 比 是 9 ： 5 ． 这 批 电脑 共 多少 台 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14152", "content": "把 一根 木头 截 成 3 段 ， 要 8 分钟 ． 如果 把 同样 的 木头 要 截 成 6 段 ， 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7313", "content": "一 台 碾米机 4 小时 碾米 200 千克 ， 照 这样 计算 ， 要 碾米 2500 千克 ， 要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12195", "content": "计算 ： 0.048 * 48 + 0.024 * 20 + 0.096 * 21 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "21405", "content": "有 一只 长颈鹿 高 (16/10) 米 ， 比 一头 大象 的 (5/2) 倍 还 多 (1/10) 米 ， 这 头 大象 高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1638", "content": "一 个数 是 72 ， 它 的 25 倍 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19341", "content": "工程队 修 一条 公路 ， 原 计划 每天 修 3.6 千米 ， 20 天 修 完 ． 实际 每天 比 计划 多 修 0.4 千米 ， 实际 提前 多少 天 修 完 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10961", "content": "修 一段路 ， 已修 的 米 数 与 未 修 的 米 数 的 比 是 4 ： 3 ， 已修 的 占 全长 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6877", "content": "一 个数 除以 5 - 200 再 乘以 2 ， 最后 加上 30 ， 结果 等于 230 ， 这个 数 = ？ 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7985", "content": "甲 、 乙 两城 相距 680 千米 ， 一辆 汽车 从 甲 城 开往 乙 城 ， 行驶 了 4 小时 后 ， 距 乙 城 还有 440 千米 ． 这辆 汽车 的 平均速度 是 每 小时 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15210", "content": "庆 6 一 活动 ， 幼儿园 买 回 380 份 奖品 ， 分给 7 个 班 后 ， 还 剩下 30 份 ． 平均 每班 分 得 奖品 多少 份 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22872", "content": "甲 每 小时 加工 58 个 零件 ， 乙 每 小时 加工 42 个 零件 ， 甲 、 乙 共同 加工 6 小时 ， 还 剩 83 个 零件 没 加工 完 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21030", "content": "一 个 机耕 队 为 某村 翻地 ， 前 5 天 翻 了 44.8 公顷 ， 后 6 天 每天 翻 10.5 公顷 ， 这个 机耕 队 平均 每天 翻地 多少 公顷 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4833", "content": "有 一幢 楼房 每 上 一层 要 走 14 级 台阶 ， 到 小 平 家 要 走 70 级 台阶 ， 他 家住 在 多少 楼 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9840", "content": "小 方 带 着 一条 猎犬 骑车 离家 到 25.2 千米 远 的 磨 山 效游 ， 他 骑车 速度 是 每 小时 18 千米 ， 猎犬 奔跑 的 速度 是 车速 的 2 倍 ． 当 猎犬 跑 到 磨 山脚下 后 ， 如 小 方 还 未 到 ， 则 马上 返回 迎 着 小 方 跑 去 ． 遇到 小 方 后 再 跑 回 磨 山 … 这样 来回 跑 一直 到 小 方 到 磨 山 为止 ． 这样 ， 这 只 猎犬 一共 跑 了 多少 千米 路 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2198", "content": "有 一个 挂钟 ， 几时 就 敲 几下 ， 钟 敲 5 下 ， 4 秒 完成 ， 钟 敲 10 下 ， 多少 秒 完成 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3119", "content": "9 寨 沟 的 长海 湖 最 宽 处 约 4400 m ， 比 它 的 长短 (9/20) ． 它 的 长 约 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16238", "content": "在 算式 □ * 5 / 4 - 414 + 12 = 2008 中 ， □ 里 应 填入 的 数字 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7811", "content": "买 4 千克 香蕉 和 5 千克 菠萝 共用 30.4 元 ， 已知 每千克 香蕉 售价 是 3.8 元 ， 每千克 菠萝 的 售价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14912", "content": "天平 一端 放 着 一块 巧克力 ， 另一端 放 着 (1/5) 块 巧克力 和 50 克 的 砝码 ， 这时 天平 恰好 平衡 ． 整块 巧克力 的 重量 = 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6965", "content": "世界 第一 长河 - - 尼罗河 全长 6670 千米 ， 长江 比 尼罗河 的 (9/10) 还 长 297 千米 ， 长江 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8313", "content": "某村 种粮 1600 亩 ， 种菜 比 种粮 多 (1/4) ， 种菜 比 种粮 多 多少 亩 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16901", "content": "一 个数 的 25% 是 4 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12124", "content": "小 李 打 一份 2700 字 的 稿件 ． 她 5 小时 打 了 (7/9) ． 她 平均 每 小时 打 多少 个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8860", "content": "东方 小学 组织 学生 到 校外 植树 ， 五年级 40 人 共 植树 150 棵 ， 六年级 45 人 ， 每人 植树 8 棵 ， 这 两个 年级 平均 每人 植树 多少 棵 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9775", "content": "一 辆 旅游车 在 平原 和 山区 各行 了 2 小时 ， 最后 到达 山顶 ， 已知 旅游车 在 平原 的 速度 是 50 千米 / 小时 ， 在 山区 的 速度 是 30 千米 / 小时 ． 这 段 路程 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16700", "content": "学校 买来 5 箱 排球 ， 每箱 8 只 ， 一 共用 了 2000 元 ， 每 只 排球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1505", "content": "墨水 厂 生产 了 3600 瓶 墨水 ， 25 瓶装 一盒 ， 4 盒装 一箱 ． 一共 可以 装 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6649", "content": "一 块 手表 打 0.85 后 卖价 是 34 元 ， 其 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18878", "content": "仓库 有 化肥 88 吨 ， 把 它 的 (3/4) 平均 分给 6 个 农资 商店 ， 每个 农资 商店 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18758", "content": "幸福村 原来 有 一个 宽 20 米 的 长方形 鱼池 ． 后 因 扩建 公路 ， 鱼池 宽 减少 了 5 米 ， 这样 鱼池 的 面积 就 减少 了 150 平方米 ． 现在 鱼池 的 面积 = 多少 平方米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15730", "content": "王师傅 做 了 125 个 零件 ， 合格率 是 80% ， 合格 的 零件 有 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13341", "content": "一 个数 除以 6 ， 商 是 102 ， 余数 是 3 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22127", "content": "文具店 中 2 支 自动铅笔 的 售价 是 7 元 ， 3 支 钢笔 的 售价 是 14 元 ． 张老师 准备 为 同学 们 购买 10 支 自动铅笔 和 21 支 钢笔 ， 一共 需要 花 多少 元 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22759", "content": "某 零件厂 计划 今年 生产 零件 240 万个 ， 结果 上半年 完成 今年 计划 的 (5/8) ， 下半年 完成 的 与 上半年 同样 多 ， 这个 厂 今年 的 产量 越过 计划 多少 万个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10205", "content": "一 台 电脑 先 打 0.9 ， 再 打 0.8 后 售价 为 3600 元 ， 这 台 电脑 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18220", "content": "在 学校 团体操 表演 中 ， 男生 有 400 人 ， 女生 有 340 人 ， 每行 站 20 人 ， 女生 比 男生 少 站 多少 行 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4878", "content": "小 卫 平均 每天 做作业 的 时间 是 (2/5) 小时 ， 体育锻炼 的 时间 是 做作业 时间 的 (5/6) ． 小 卫 每天 体育锻炼 的 时间 = 多少 小时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11723", "content": "甲乙 两艘 轮船 同时 从 大连 开往 天津 ， 甲 船 每 小时 行 19 千米 ， 乙 船 每 小时 行 27 千米 ， 经过 6 小时 ， 两 船 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13292", "content": "从 底楼 走 到 3 楼 ， 用 了 24 秒 ； 那么 从 1 楼 走 到 6 楼 ， 需要 多少 秒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16030", "content": "商店 以 68 元 一件 的 价格 购进 一批 衣服 ， 售价 为 每件 96 元 ， 一月份 共 售出 115 件 ， 除去 各种 开支 874 元 ， 那么 这家 商店 还 可以 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7343", "content": "一 个数 的 (1/2) 比 这个 数 的 75% 少 10 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20179", "content": "3 * 87 * 37 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15628", "content": "皇朝 家具城 运 来 8 车 椅子 ， 每 车 142 把 ， 每 把 椅子 的 售价 是 25 元 ． 这 批 椅子 一共 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21556", "content": "一 本书 看 了 28 页 ， 占 全部 页码 的 (1/4) ， 这 本书 共有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13632", "content": "学校 组织 少先队员 参观 创建 文明城市 图片展 ． 五年级 去 了 12 人 ， 六年级 去 的 人数 比 五年级 的 1.5 倍 多 20 人 ． 六年级 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22041", "content": "某 服装厂 一月份 生产 女 童装 7800 套 ， 生产 的 男 童装 比 女 童装 的 3 倍 少 1800 套 ， 生产 男 童装 多少 套 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5546", "content": "校门口 两侧 种 树苗 ， 原 打算 两侧 都 种 7 棵 ， 每隔 4 米 种 一棵 ， 实际 两侧 都 种 了 9 棵 ， 每 两棵树 间 的 距离 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22284", "content": "3.46 与 2.7 的 积 再 加上 4.08 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3195", "content": "慢车 的 速度 比 快车 速度慢 20% ， 快车 比 慢车 快 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2384", "content": "在 一个 环形 跑道 上 每隔 4 米 插 上 一面 红旗 ， 共 插 了 100 面 ， 这个 跑道 的 一周 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19307", "content": "星期天 ， 12 名 学生 去 参加 图书 展 ， 共 付 门票 300 元 ， 每人 去 的 时候 乘车 花 了 2 元 ， 平均 每人 一共 花 了 多 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12268", "content": "小 玲 和小红 都 喜欢 收集 邮票 ， 小 玲 说 ： “ 我 现在 有 150 张 邮票 ， 如果 再 收集 15 张 邮票 ， 我 的 张 数 就是 小 红 的 1.5 倍 ． ” 小 红 有 多少 张 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12741", "content": "12 * （ (1/6) + (3/4) ） = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12213", "content": "一 座 桥 长 3400 米 ， 一辆 火车 以 1200 米 / 分 的 速度 ， 从 车 头上 桥 到 车尾 离 桥 共用 了 3 分钟 ， 求 火车 的 长度 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20450", "content": "小 明 今天 在 游泳池 游 了 2 个 来回 ， 一共 游 了 200 米 ， 泳池 有 多长 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12286", "content": "水果 店里 有 梨 5 筐 ， 比 苹果 少 25 筐 ． 苹果 的 筐 数 是 梨 的 多少倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14396", "content": "一 堆 沙 ， 工程队 每天 用 去 (2/9) ， 3 天 共用 去 这 堆 沙 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20461", "content": "在 跳高 比赛 中 ， 张 颖 跳 了 1.1 米 ， 张 华 比 张 颖 跳 的 高 0.12 米 ． 销量 比 张 华 跳 的 低 0.08 米 小 亮 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7539", "content": "甲乙 两车 从 相距 328 千米 的 ab 两地 相向 而 行 ， 经过 4 小时 辆车 相遇 ， 已知 甲 车 平均 每 小时 行 47 千米 ， 乙 车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15911", "content": "甲 、 乙 两车 分别 从 a 、 b 两城 同时 相对 开出 ， 7 小时 后 相遇 ， 然后 又 各自 向前行驶 2 小时 ， 这时 甲 车 距 b 城 还有 240 千米 ， 乙 车 距 a 城 还有 360 千米 ， a 、 b 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12707", "content": "一 辆 汽车 前 5 小时 平均 每 小时 行 70 千米 ， 后 2 小时 平均 每 小时 行 35 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "114", "content": "汽车 从 甲地 开往 乙地 ， 每 小时 行 45 千米 ， 4 小时 到达 ． 返回 时 速度 增加 到 每 小时 60 千米 ， 这样 需要 几小时 才能 回到 甲地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22735", "content": "计算 ： 20112012 / 10001 + 30363033 / 30003 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14464", "content": "5 （ 1 ） 班 有 45 个 学生 ， 男生 占 全班 人数 的 (4/9) ， 则 女生 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4310", "content": "工程队 计划 铺设 一条 长 7.2 千米 的 水管 ． 实际 前 3 天 铺设 了 1.8 千米 ． 照 这样 计算 ， 剩下 还要 铺 几天 才能 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15440", "content": "一 个 空 油桶 装进 40% 的 油 以后 ， 连 桶 共 重 8.5 干 克 ， 当 这个 油桶 装满 油 以后 ， 连 桶 共 重 16 干 克 ， 这时 要 使 油桶 中 剩下 80% 的 油 ， 需要 从 桶 中 倒 出 多少 千克 油 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11558", "content": "6 一班 图书 角 有 图书 120 本 ， 借出 80 本 后 ， 还 剩下 几分 之 几 没有 借出 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11860", "content": "有 两筐 苹果 ， 单 甲 筐 用 去 (1/5) ， 乙 筐 用 去 (1/7) 后 ， 剩下 的 两筐 同样 多 ， 已知 甲 筐 有 45 千克 ， 乙 筐 苹果 有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18879", "content": "水果店 运 来 一批 水果 ， 其中 苹果 重 132 千克 ， 梨 的 重量 是 苹果 的 (5/11) ， 香蕉 的 重量 是 梨 的 (5/6) ． 运 来 香蕉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1046", "content": "某 商店 上午 卖出 牛奶 20 箱 ， 下午 卖出 30 箱 ， 下午 卖出 的 牛奶 比 上午 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19195", "content": "玩具厂 过去 5 天 生产 4000 盒 积木 ， 现在 每天 生产 1500 盒 ， 现在 比 过去 每天 多 生产 多少 盒 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18747", "content": "一 个 木工 组 要 做 1450 张 课桌 ． 已经 做 了 640 张 ， 剩下 的 要 用 30 天 做 完 ． 平均 每天 要 做 多少 张 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5485", "content": "一 个数 除以 5 ， 商 是 7 ， 余数 是 3 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "77", "content": "新光 电器城 一种 dvd 的 原价 是 每 台 1850 元 ， 现在 降价 20% 出售 ． 这种 dvd 现在 的 售价 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21902", "content": "向阳 小学 的 操场 是 一个 长方形 ， 长 100 米 、 宽 65 米 ． 小强 围着 操场 跑 了 2 圈 ， 小强 一共 跑 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19219", "content": "桐 县 去年 的 实际 绿化 面积 比 原 计划 增加 了 (1/5) ， 实际 比 原 计划 多 绿化 150 公顷 ， 原 计划 绿化 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7624", "content": "2929 * 22 - 8888 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9508", "content": "3 * 506 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22959", "content": "修建 一个 长方体 蓄水池 ， 要 蓄水 2.4 米 深 ， 如果 每分钟 灌水 36 立方米 ， 40 分钟 灌满 ， 这个 水池 的 底 面积 = 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16480", "content": "1 - (3/10) 的 差 除以 (3/8) + 0.5 的 和 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6223", "content": "把 108 个 练习本 平均 发给 9 个 同学 ， 每个 同学 分 得 多少 个 练习本 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7740", "content": "1 米 的 (3/8) 和 多少 米 的 (1/8) 一样 长 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5136", "content": "一 个 大 信封 中 放 3 个 中等 信封 ， 每个 中等 信封 中 又 放 6 个 小 信封 ， 一共 有 多少 个 信封 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2949", "content": "一 桶 油 用 去 10.2 千克 ， 剩下 的 是 用 去 的 2.8 倍 ， 剩下 多少 千克 油 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16085", "content": "将 9 张 长 25 厘米 的 木条 顺次 钉 在 一起 ， 每个 接头处 重合 3 cm ， 钉好 的 木条 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4889", "content": "学校 有 120 盒 彩 粉笔 ， 比 白粉笔 少 (3/5) ， 学校 共有 粉笔 多少 盒 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17975", "content": "小 刚 在 计算 小数 加法 时 ， 把 其中 一个 加数 2.6 当作 26 了 ， 结果 得 38.5 ， 那么 你 知道 正确 的 结果 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5734", "content": "小巧 家 本月 的 水费 为 32.70 元 ， 电费 比 水费 的 3 倍 多 5.25 元 ， 小巧 家 本月 的 电费 为 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20389", "content": "甲 ． 乙 两 人 分别 从 两地 同时 出发 相对 而 行 ， 甲 每分钟 行 70 米 ， 乙 每分钟 行 50 米 ， 20 分钟 后 ， 两 人 过 了 相遇 点 又 相距 100 米 ． 问 两地 间 的 路程 = 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9266", "content": "一 种 笔记本电脑 ， 现在 每 台 卖 3600 元 ， 比 原来 每 台 优惠 10% ． 原来 每 台 这种 电脑 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4169", "content": "12 的 (6/5) 倍 + (3/5) 再 去除 (9/10) ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18848", "content": "(6/7) 的 多少 是 (2/9) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2845", "content": "一 辆 公共汽车 到达 东方广场 站 有 (1/6) 的 人 下车 ， 接着 又 有 5 人 上车 ， 返 时 车上 的 人数 和 来 一样 多 ． 原来 车上 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1481", "content": "甲 是 72 ， 是 乙 的 80% ， 乙 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13812", "content": "一 个 正方形 的 周长 是 4 分 米 ， 它 的 边长 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12227", "content": "班主任 雷 老师 要 把 5 张 科学家 画像 贴 到 6 米 长 的 墙上 ， 每张 画像 的 宽 是 0.72 米 ， 要求 墙 的 两端 空 出 的 长度 与 相邻 两张 画像 之间 的 距离 都 相等 ． 相邻 两张 画像 之间 的 距离 = 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16302", "content": "妈妈 用 50 元 买 了 4 千克 桔子 ， 找回 的 钱 正好 可以 买 6 只 猕猴桃 ， 每 只 猕猴桃 售价 3 元 ， 每千克 桔子 售价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10680", "content": "果园 里 有 苹果树 93 棵 ， 梨树 是 苹果树 的 3 倍 ， 果园 里 有 苹果树 和 梨树 一共 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23109", "content": "李家 3 月份 用电 85 千瓦时 ， 付 电费 46.75 元 ． 4 月份 用电 105 千瓦时 ， 应付 电费 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19335", "content": "每千克 橘子 2.50 元 ， 每千克 香蕉 4.60 元 ， 妈妈 买 了 4 千克 橘子 和 5 千克 香蕉 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6519", "content": "要 从 含盐 12.5% 的 盐水 40 千克 中 蒸 去 多少 水分 才能 制出 含盐 20% 的 盐水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20628", "content": "一 家 电视机厂 9 月份 计划 生产 电视机 50000 台 ， 实际 增产 了 12% ， 实际 多 生产 了 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15114", "content": "暑假 期间 ， 王 朋 回到 乡下 奶奶家 ， 帮 奶奶 摘 果园 的 桃子 ， 3 天 摘 了 全部 的 (3/7) ， 照 这样 的 速度 ， 摘 完 果园 的 桃子 一共 要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21100", "content": "火车 每 小时 行 110 千米 ， 飞机 的 速度 比 火车 速度 的 8 倍 少 20 千米 ， 飞机 每 小时 行 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17662", "content": "甲乙 两地 相距 720 千米 ， 一辆 客车 和 一辆 货车 同时 从 甲乙 两地 相向 而 行 ， 客车 每 时 行 64 千米 ， 两车 经过 6 时 相遇 ， 货车 每 时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18238", "content": "15 * 338 与 109 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21486", "content": "一 捆 铁丝 重 400 克 ， 长 8 米 ， 另 一捆 铁丝 重 4000 克 ． 你 知道 这 捆 铁丝 有 多长 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4205", "content": "公园 里 有 柳树 60 棵 ， 松树 的 棵 数 比 柳树 多 (2/3) ， 公园 里 有 松树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19384", "content": "工程队 修 一条 公路 ， 原 计划 每天 修路 300 米 ， 25 天 完成 ， 现在 要 提前 到 15 天 完成 ． 每天 应 修 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18094", "content": "用 铁皮 制 10 节 同样 大小 的 通风管 ， 每节 长 5 分 米 ， 底面 直径 1.2 分 米 ， 至少 需要 多少 平方分米 铁皮 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "18024", "content": "某 沙漠 探险队 平均 每天 行 45 千米 ， 从 出发地 到 目的地 共 360 千米 ， 大约 几天 能 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4548", "content": "从 果园 运走 1500 千克 桃 ， 运走 的 苹果 是 桃 的 4 倍 ， 桃 和 苹果 一共 运走 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9882", "content": "生产 小组 加工 零件 1364 个 ， 计划 22 天 完成 ， 实际 每天 比 计划 每天 多 加工 9 个 ， 实际 每天 加工 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1907", "content": "山羊 有 120 只 ， 比 绵羊 少 (1/6) ， 绵羊 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15403", "content": "演 草本 每 本 0.45 元 ， 笔记本 每 本 1.3 元 ． 两种 本子 各 买 15 本 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10472", "content": "学校 花坛 里 种 了 35 行 月季花 ， 每行 160 棵 ． 一共 种 了 多少 棵 月季花 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22137", "content": "欣欣 水果店 运 来 苹果 、 橘子 和 梨 共 335 千克 ， 如果 橘子 再 增加 10 千克 ， 这 3 种 水果 的 重量 比 是 5 ： 6 ： 4 ， 问 橘子 原来 运进 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "3482", "content": "一 个 小数 ， 把 它 扩大 100 倍 后 就 比 原 数 大 482.13 ， 原来 这个 小数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19276", "content": "一 个数 的 (6/7) 与 20 的 (3/5) 相等 ． 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6700", "content": "一 次 数学 竞赛 总 分为 80 分 ， 小 方 得 了 60 分 ， 如果 把 这次 总分 折算 成 100 分 ， 那么 小 方 得 了 多少 分 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16627", "content": "6 只 燕子 7 天 吃 害虫 4200 只 ， 平均 每 只 燕子 每天 吃 多少 只 害虫 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15287", "content": "仓库 有 150 吨 钢材 ， 第一次 用 去 总数 的 20% ， 第 二 次 用 去 总数 的 (1/3) ． 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4232", "content": "乌龟 和 兔子 赛跑 ， 同 一段路 ， 兔子 跑 完 需 20 分钟 ， 乌龟 跑 完 需 30 分钟 ， 兔子 的 速度 是 乌龟 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7552", "content": "甲 、 乙 两辆 汽车 同时 从 a ， b 两地 相向 开出 ， 甲 车 每 小时 行 60 千米 ， 乙 车 的 速度 是 甲 车 的 (4/5) ， 经过 (5/6) 小时 后 两车 相遇 ， a ， b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8604", "content": "某 林场 去年 计划 造林 2000 公顷 ， 实际 造林 2400 公顷 ， 实际 比 计划 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5587", "content": "丁丁 排 在 一行 队伍 的 中间 ， 他 朝 右面 数数 有 4 个人 ， 朝 左面 数数 有 3 个人 ， 这 行 队伍 一共 有 多少 个人 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11001", "content": "滨江区 一套 112 平方米 的 住宅 需要 681520 元 ， 这 套 住宅 每平方米 的 售价 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14655", "content": "一 个 除法 算式 题 ， 除数 是 4 ， 商 是 7 ， 被除数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "391", "content": "14 辆 汽车 8 天 共 节约 汽油 360.64 千克 ． 平均 每辆 汽车 一天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19590", "content": "一 堆 沙 的 (4/5) 是 40 吨 ， 这 堆 沙 = 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13402", "content": "小 明 看 一本 120 页 的 故事书 ， 每天 看 (1/10) ， 已经 看 了 3 天 ， 还有 几分 之 几 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15944", "content": "学校 图书馆 有 故事书 500 本 ， 占 全部 图书 的 (1/13) ， 学校 图书馆 共有 图书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8301", "content": "王 爷爷 将 5000 元 存入 银行 ， 定期 3 年 ． 如果 年利率 是 2.89% ， 到期 时 他 可以 获得 本金 和 税后 利息 一共 多少 元 ？ （ 利息税 20% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14992", "content": "小 明 今年 12 岁 ， 小 杰 比 他 大 3 岁 ， 3 年 后 ， 小 明 年龄 是 小 杰 年龄 的 几分 之 几 ？ 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "246", "content": "养殖场 养 了 420 头 肉牛 ， 比 养 的 奶牛 少 (1/7) ， 养 了 多少 头 奶牛 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11575", "content": "一 桶 汽油 重 160 kg ， 用 去 (3/4) ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3138", "content": "某 军 排 着 300 米 长 的 队伍 行军 ， 速度 是 4 米 / 秒 ， 走 在 队伍 最后 的 通讯员 ， 接到 命令 后 立即 以 8 米 / 秒 的 速度 追赶 走 在 最 前面 的 指挥员 ， 追 到 后 又 立即 以 相同 速度 返回 原来 位置 ， 从 接到 命令 到 返回 原位 共用 多少 秒 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13363", "content": "仓库 里 有 15 吨 钢材 ． 用 去 总数 的 20% ， 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8257", "content": "5.6 + 9.8 与 5.4 的 差 ， 所得 的 和 除以 0.5 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7749", "content": "一 只 蜗牛 从 9 厘米 高 的 杯子 底 往上爬 ， 它 每 爬 3 厘米 要 用 4 分钟 ， 然后 休息 2 分钟 ， 这 只 蜗牛 从 杯子 底 爬 到 杯口 要 用 多长时间 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22586", "content": "爸爸 的 年龄 是 小 明 的 3.2 倍 ， 妈妈 的 年龄 是 小 明 的 2.6 倍 ， 已知 爸爸 比 妈妈 大 9 岁 ， 小 明 多少岁 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16492", "content": "商店 上午 运进 苹果 240 千克 ， 下午 运进 苹果 360 千克 ， 如果 每 15 千克 苹果 装进 一个 纸箱 ， 上午 比 下午 少 用 几个 纸箱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20672", "content": "一 个 畜牧场 养猪 1200 头 ， 比 养牛 的 头数 少 25% ， 养 的 猪 比 养 的 牛 少 多少 头 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8401", "content": "小 明 将 500 元 存入 银行 ， 有 2 年 定期 ， 已知 银行 两年 定期 的 年利率 为 3.06% ， 到期 需 支付 20% 的 利息税 ， 则 到期 时 小 明 取出 本利和 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "5629", "content": "从 9.6 里 连续 减去 多少 个 0.24 ， 结果 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16428", "content": "一 种 商品 打 0.8 后 售价 是 100 元 ， 原价 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19737", "content": "一 辆 客车 和 一辆 货车 同时 从 甲 城 开往 乙 城 ， 客车 每 小时 行 81 千米 ， 货车 每 小时 行 72 千米 ， 6 小时 后 ， 客车 达到 乙 城 ， 再 经过 几小时 货车 才能 到达 乙 城 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2193", "content": "一 件 工作 若 完成 它 的 (5/12) 用 10 小时 ， 若 完成 它 的 (2/3) 用 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11372", "content": "一 个 乘数 是 8 ， 积 是 968 ， 另 一个 乘数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7051", "content": "一 台 熊猫 电视机 ， 原价 是 2400 元 ， 现在 每 台 优惠 5% ， 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10785", "content": "甲 、 乙 、 丙 3 人 ， 甲 每分钟 走 20 米 ， 乙 每分钟 走 22.5 米 ， 丙 每分钟 走 25 米 ． 甲 、 乙 从 东 镇 ， 丙 从 西 镇 同时 相向 出发 ， 丙 遇到 乙 后 再 过 10 分钟 遇到 甲 ， 两 镇 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9036", "content": "工人 们 修 一条 公路 ， 如果 每天 修 12 米 ， 10 天 修 完 ， 实际 每天 多 修 3 米 ， 实际 多少 天 可以 修 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21229", "content": "一 个 修路 队 要 修 一条 公路 ， 计划 每天 修 280 米 ， 20 天 完成 任务 ， 实际 用 6 天 完成 ， 每天 比 原 计划 多 修 了 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17510", "content": "小 敏 看 一 本书 ， 第一天 看 了 这 本书 的 (2/9) ， 第 二 天 比 第一天 多 看 了 这 本书 的 (1/9) ． 这 本书 还有 几分 之 几 没 看 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3206", "content": "某 书店 将 定价 为 12.5 元 的 挂历 降价 20% 出售 ， 结果 还 获得 了 25% 的 利润 ． 进价 = 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6330", "content": "爸爸 的 身高 是 1.8 米 ， 是 小 明 身高 的 1.2 倍 ， 小 明 的 身高 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16315", "content": "行 同样 的 一段路 ， 客车 要 3 小时 ， 货车 要 5 小时 ． 两车 同时 从 甲乙 两地 相对 开出 ， 经过 6 小时 相遇 ， 货车 行 完全 程 共 要 用 多少 小时 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14194", "content": "小 明 从 家 到 学校 ， 前 4 分钟 每分钟 走 80 米 ， 后 6 分钟 每分钟 走 90 米 ， 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8267", "content": "一 张 长 35 厘米 ， 宽 15 厘米 的 长方形 纸卷 成 一个 圆柱 ， 圆柱 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22776", "content": "国庆节 期间 ， 君 宁 商城 的 李宁 运动鞋 降价 (1/8) 以后 ， 现价 比 原价 少 了 32 元 ， 李宁 运动鞋 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16657", "content": "小 明 看 一本 故事书 ， 看 了 4 天 ， 每天 都 看 5 页 ， 还 剩 20 页 ， 这 本书 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4637", "content": "小 明 带 若干 元 钱 去 超市 购物 ， 他 用 其中 的 (1/4) 买 图书 ， 用 其中 的 (1/5) 买 零食 ， 剩下 的 部分 购买 了 航模 材料 ， 问 购买 航模 材料 的 钱 占 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21749", "content": "上海 至 天津 铁路 长 1375 千米 ． 一列 火车 从 上海 开往 天津 ， 当 行 了 总 路程 的 (3/5) 时 ， 接到 通知 要求 火车 提速 到 每 小时 行 110 千米 ， 再 经过 多少 小时 到达 天津 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17346", "content": "甲 数 是 200 ， 乙 数 是 甲 数 的 35 倍 ， 乙 数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16018", "content": "a 、 b 、 c 3 人行 的 速度 分别 是 每分钟 40 米 、 50 米 、 60 米 ， a 、 b 在 甲地 ， 而 c 在 乙地 同时 相向 而 行 ， c 遇 b 后 10 分钟 和 a 相遇 ． 甲乙 两地 间 的 路 长 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "21170", "content": "小 明 买 一本 单价 0.9 元 的 练习本 ， 付 1 元 钱 ， 应 找回 多少 元 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1207", "content": "学校 买 了 15 套 桌椅 ， 每 把 椅子 21.6 元 ， 每张 桌子 78.4 元 ． 学校 买 椅子 和 桌子 共 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "447", "content": "去年 果园 里 有 梨树 和 桃树 共 400 棵 ， 其中 桃树 占 总数 的 40% ． 今年 又 种 一些 桃树 ， 梨树 棵 树 不变 ， 这 是 梨树 占 总数 的 48% ， 现在 这 两种 果树 一共 有 多少 棵 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12699", "content": "从 相同 的 6 盒 糖果 中 各 取出 200 颗 ， 剩余 的 糖果 的 数量 正好 等于 原来 2 盒 糖果 的 数量 ． 那么 ， 原来 每盒 装有 多少 颗 糖果 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19254", "content": "学校食堂 有 6000 千克 煤 ， 前 8 天 烧 650 千克 ， 剩余 的 2 天 烧 完 ， 剩余 的 平均 每天 烧 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8618", "content": "一 本 数学 读物 6.25 元 ， 一本 语文 读物 5.86 元 ． 两本书 一共 要 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6838", "content": "一 条 路 ， 修 了 4 天 后 ， 已修 部分 与 剩下 部分 的 比 是 2 ： 3 ， 如果 再 修 75 米 ， 就 能 到达 终点 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4425", "content": "一 根 绳子 ， 用 去 了 (2/3) 米 ， 正好 是 剩下 的 (1/8) ． 这根 绳子 原来 有 的 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19687", "content": "王 伯伯 家 承包 了 一块 菜田 ， 前年 收 白菜 41.6 吨 ， 去年 收 白菜 52 吨 ， 前年 比 去年 少收 了 几成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2139", "content": "食堂 运 来 一批 大米 ， 吃 了 520 千克 ， 还 剩下 的 是 吃 了 的 2 倍 ， 食堂 一共 运 来 多少 千克 大米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22565", "content": "王老师 带 了 71.2 元 去 文具店 ， 用 29.2 元 买 了 3 支 钢笔 ， 剩下 的 钱 准备 买 7 元 一本 的 日记本 ． 王老师 可以 买 几本 这样 的 日记本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18447", "content": "小 芳 每分钟 走 70 米 ， 小 丽 每分钟 走 60 米 ． 小 芳 和 小 丽 同时 从 家 出发 ， 经过 8 分钟 两 人 在 桥 上 相遇 ， 她们 两家 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6102", "content": "修 一条 高速公路 ， 甲队 修 了 全长 的 60% ， 乙 队 修 了 全长 的 30% ， 甲队 比 乙 队 多 修 27 千米 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6681", "content": "一 块 长方形 草地 的 面积 是 456 平方米 ， 长 是 38 米 ， 宽 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21109", "content": "小 明 读 一 本书 ， 已经 读 了 30 页 ， 还 剩下 全书 的 (13/18) 没有 读 ． 还要 读 多少 页 才能 读完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8660", "content": "在 课外 兴趣小组 中 ， 美术组 有 25 人 ， 舞蹈 组 的 人数 是 美术组 的 1.4 倍 ， 这 两个 小组 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18296", "content": "星光 小学 六年级 共有 学生 52 人 ， 其中 男生 38 人 ， 女生 人数 占 全年 级 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9115", "content": "玲玲 步行 去 上学 ， 现已 走 了 5 分钟 ， 走过 的 路程 和 剩下 的 路程 的 比 为 1 ： 2 ， 照 这样 的 速度 ， 走 到 学校 一共 需要 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8211", "content": "小 明 去 超市 买 文具盒 用 去 13.46 元 ， 买 铅笔 比 文具盒 少 用 了 2.9 元 ． 小 明 一共 花 了 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "472", "content": "一 种 电视机 ， 原来 每 台 10000 元 ， 比 现在 贵 25% ， 现在 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9500", "content": "一 个 小数 扩大 10 倍 后 ， 比 原 数 大 了 22.5 ， 这个 原 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8710", "content": "一 张 饼 ， 小 明 吃 了 (1/6) ， 小 青 吃 了 余下 的 (2/5) ， 小 青 吃 了 这 张 饼 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12455", "content": "(7/15) / 5 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1831", "content": "妈妈 存入 银行 60000 元 ， 定期 一年 ， 年利率 是 2.25% ， 一年 后 妈妈 从 银行 共 取回 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2944", "content": "二年级 同学 参加 杭州 乐园 和 千岛湖 两个 夏令营 活动 ． 参加 杭州 乐园 的 有 36 人 ， 参加 千岛湖 的 有 28 人 ， 两个 夏令营 都 参加 的 有 8 人 ． 二年级 一共 有 多少 人 参加 了 夏令营 活动 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11003", "content": "王老师 每月 工资 1450 元 ， 超出 1200 元 的 部分 按 5% 交纳 个人所得税 ． 王老师 每月 税后 工资 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12336", "content": "16 与 1.25 的 积 减去 2.6 与 1.7 的 和 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18507", "content": "服装厂 加工 1000 套 童装 ， 原 计划 40 天 完成 ， 实际 25 天 完成 ， 原 计划 每天 比 实际 每天 少 加工 多少 装 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13143", "content": "工地 运 来 一堆 红砖 ， 上午 用 去 了 (2/5) ， 下午 用 去 了 (3/8) ， 还 剩 270 块 ， 工地 一共 运 来 红砖 多少 块 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2326", "content": "化工厂 每天 用 煤 1.3 吨 ， 比 计划 每天 多用 0.1 吨 ， 那么 原 计划 65 天 用 的 煤 ， 实际 能 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11134", "content": "学校 开展 兴趣小组 活动 ， 参加 书法 组 的 有 30 人 ， 比 美术组 的 45% 少 6 人 ， 参加 美术组 的 有 几 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11250", "content": "妈妈 给 小 军 买 了 一盒 水果糖 ， 每天 吃 3 粒 则 能 吃 30 天 ， 如果 每天 只 吃 2 粒 ， 能 吃 多少 天 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15139", "content": "幼儿园 小朋友 做 纸花 ， 其中 有 8 朵 是 红色 的 ， 红色 的 纸花 占 纸花 总数 的 (2/5) ． 他们 共 做 了 多少 朵 纸花 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14458", "content": "江 叔叔 从 某 城市 乘火车 去 北京 用 了 14 时 ， 火车 1 时 约 行使 125 千米 ， 该 城市 到 北京 大约 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "276", "content": "果园 里 共有 1542 棵 果树 ， 其中 梨树 有 147 棵 ， 桃树 有 684 棵 ， 其余 的 全部 是 苹果树 ． 苹果树 有 多少 棵 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12496", "content": "聪聪 读 一本 课外书 ， 第一天 读 了 全书 的 (1/3) ， 第 二 天 读 了 全书 的 (1/4) ， 第 3 天 读 了 全书 的 (2/5) ， 你 知道 聪聪 还要 读 几分 之 几 就 能 读完 这 本书 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5761", "content": "一 块 三角形 菜地 边长 的 比 是 4 ： 3 ： 2 ， 周长 是 189 米 ， 其中 最长 的 边长 = 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21317", "content": "振华 机器 制造厂 制造 一台 机器 ， 原来 用 钢材 1.44 吨 ， 经过 技术革新 ， 现在 比 原来 节约 0.24 吨 ， 原来 制造 50 台 机器 用 的 钢材 ， 现在 可以 制造 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10914", "content": "一 条 长 192 千米 的 公路 ， 一辆 汽车 花 1.2 小时 行 48 千米 ， 照 这样 计算 ， 行 完全 程 还要 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5845", "content": "一 项 工程 ， 甲 单独 做成 15 天 完成 ， 乙 单独 做成 10 天 完成 ． 两队 合 做 多少 天 完成 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9625", "content": "某 公司 投资 建设项目 ， 实际 投资 60 万元 ， 比 计划 投资 节省 25% ， 节省 了 多少 万元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12684", "content": "工地 有 一堆 石子 ， 第一次 运走 60% ， 第 二 次 运走 (1/4) ， 还 剩下 30 吨 ， 这 堆 石子 共 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6613", "content": "一 件 衣服 打 0.8 出售 ， 便宜 了 15 元 ， 这件 衣服 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1880", "content": "学校 合唱组 的 人数 是 美术组 的 (5/6) ， 又 是 书法 组 的 (3/4) ． 已知 美术组 有 54 人 ， 书法 组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22028", "content": "如果 把 一根 木头 锯 成 4 段 要 12 分钟 ， 那么 用 同样 的 速度 把 这根 木头 锯 成 10 段 ， 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21314", "content": "加工 一批 零件 ， 第一天 加工 全部 的 (2/15) ， 比 第 二 天 少 加工 6 个 ， 两天 共 加工 的 个数 与 未加工 的 个数 比 是 2 ： 3 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17176", "content": "一 袋 大米 40 千克 ， 吃 了 (3/4) 千克 ， 还 剩 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18286", "content": "甲 、 乙 两辆 汽车 从 a 、 b 两地 同时 相向 开出 ， 出发 后 2 小时 ， 两车 相距 141 公里 ； 出发 后 5 小时 ， 两车 相遇 ． a 、 b 两地 相距 多少 公里 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21584", "content": "10 与 8.7 的 和 ， 除以 4.5 与 1.1 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2822", "content": "机床厂 去年 计划 生产 机车 500 台 ， 实际 生产 550 台 ， 超过 计划 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7228", "content": "一 根 绳 长 9 米 ， 剪 去 (1/3) 后 ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18795", "content": "红旗 连锁店 原有 饼干 632 袋 ， 卖出 385 袋 ， 又 运 来 200 袋 ， 这时 店里 有 多少 袋 瓶 干 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2871", "content": "学校 图书馆 新 买 科技 书 300 本 ， 故事书 的 本 数 比 科技 书 多 买 (1/5) ， 新 买 故事书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20104", "content": "小 红 买 一个 文具盒 用 了 5.3 元 ， 买 一本 笔记本 用 了 3.8 元 ． 她 给 售货员 10 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12033", "content": "参加 兴趣小组 的 120 人 ， 全校 人数 比 参加 兴趣小组 人数 的 12 倍 还 多 6 人 ， 全校 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20198", "content": "做 一个 圆圈 用 铁丝 (2/3) 米 ， 现有 铁丝 24 米 ， 若 用 它 的 (5/6) 做 圆圈 ， 可以 做 多少 个 圆圈 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22864", "content": "小 丽 的 妈妈 本月 买 煤气 270 方 ， 已经 用 去 (2/9) ， 还 剩下 多少 方 煤气 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2277", "content": "植树节 这天 ， 王老师 带领 同学 们 去 植树 ． 她 把 同学 们 分成 3 个 小组 ， 每个 小组 20 人 ． 共 要 植树 240 棵 ， 平均 每人 植树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12656", "content": "3 名 工人 5 小时 加工 零件 90 件 ， 要 在 10 小时 完成 540 个 零件 的 加工 ， 需要 工人 多少 人 ．", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21931", "content": "金盾 童装 厂 ， 要 做 1032 套 童装 ， 前 10 天 每天 做 60 套 ． 剩下 的 要 6 天 做 完 ， 平均 每天 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8925", "content": "甲 数 是 60 ， 乙 数 比 甲 多 20% ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22949", "content": "把 一个 长 6 厘米 ， 宽 5 厘米 ， 高 4 厘米 的 长方体 切成 3 个 大小 一样 的 小 长方体 后 ， 它 表面积 至少 要 增加 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18937", "content": "(4/5)   减去 0.9 * (2/3)   所得 的 差 被 29.4 除 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19448", "content": "学校 田径队 的 人数 是 足球队 的 (11/8) ， 田径队 有 88 人 ， 足球队 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11996", "content": "小 红 每天 用 (5/6) 小时 完成 家庭作业 ， 其中 语文 作业 占 了 (2/5) ， 语文 作业 用 了 多少 时间 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14146", "content": "前段时间 ， 南方 发生 雪灾 ， 高速公路 被 堵 ， 车辆 堵塞 ． 5 辆 8 米 长 的 卡车 和 10 辆 2.5 米 长 的 轿车 排成 了 一 字形 ， 它们 每 两辆车 之间 相隔 12 米 ， 这 队 车队 有 多长 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "13611", "content": "3 个 同学 跳绳 ， 小 明 跳 了 120 下 ， 小 亮 跳 的 是 小强 的 (2/3) ， 小强 跳 的 是 小 明 跳 的 (5/8) ， 小 亮 跳 了 多少 下 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13803", "content": "老师 家 、 小雪 家 和 学校 在 同 一条 路上 ， 老师 说 ： “ 我家 到 学校 有 315 米 ． ” 小雪 说 ： “ 我家 到 学校 有 150 米 ． ” 老师 家 与 小雪 家 最远 相距 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12371", "content": "一 只 鸡 4 千克 ， 一只 鹅 比 它 重 (1/2) ， 鹅 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2523", "content": "香蕉 每千克 售价 为 5.60 元 ， 小 亚 买 了 1.3 千克 ， 她 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21074", "content": "园林 工人 沿 公路 一侧 栽树 ， 每隔 4 米 栽 一棵 ， 一共 栽 了 16 棵 ． 从 第 一棵 到 最后 一棵 的 距离 = 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7479", "content": "15 个 学生 给 树苗 浇水 ， 平均 每人 要 浇 7 棵 ， 这时 又 来 了 几个 同学 ， 大家 重新分配 任务 ， 平均 每人 浇 5 棵 ， 又 来 了 几个 同学 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3995", "content": "学校 体育 室 有 80 根 跳绳 ， 借给 二年级 （ 1 ） 班 23 根 ， 二年级 （ 2 ） 班 30 根 ， 学校 体育 室 还 剩 多少 根 跳绳 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19354", "content": "5 名 同学 去 参观 航天 展览 ， 共 付 门票费 60 元 ， 每人 乘车 用 2 元 ， 平均 每人 花 了 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14865", "content": "箱内 装有 大小 相同 的 红球 、 白 球 、 黄 球 和 蓝球 各 10 个 ． 如果 从中 摸 出 一个 球 ， 摸 到 黄 球 的 可能性 是 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3035", "content": "新华书店 运 来 工具书 95 本 ， 运 来 的 科技 书 的 数量 是 工具书 的 3 倍 ， 一共 运 来 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13718", "content": "某 厂 要 加工 一批 零件 ， 计划 每天 加工 180 个 ， 5 天 可以 完成 ； 实际 每天 比 计划 少 加工 30 个 ， 实际 要 多少 天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8510", "content": "某 养猪场 ， 今年 养猪 400 头 ， 比 去年 多 养 25% ， 去年 养猪 多少 头 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5873", "content": "一 筐 鱼 连 筐 重 43 千克 ， 卖出 (1/3) 后 ， 又 卖出 5 千克 ， 这时 筐 里 的 鱼 连 筐 重 25 千克 ． 求 鱼 筐 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11651", "content": "食堂 买来 茄子 和 西红柿 各 15 千克 ， 每千克 茄子 2.4 元 ， 每千克 西红柿 3.6 元 ． 买 两种 菜 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3510", "content": "小 李 叔叔 上 月工资 2400 元 ， 扣除 2000 元 后 按 5% 的 税率 缴纳 个人所得税 ， 他 应 缴纳 多少 元 税 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17679", "content": "一 个数 的 (2/3) 是 20 ， 它 的 (3/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3232", "content": "张 琼 开 了 一个 童装店 ， 服装 的 定价 原则 是 ： 卖出 服装 的 价格 是 服装 进货价 加上 进货价 的 50% ． 已知 一套 男 童装 的 卖出 价格 是 180 元 ． 请问 这 套 男 童装 的 进货价 = 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3462", "content": "甲 ， 乙 两个 书架 ， 甲 书架 有 书 600 本 ， 从 甲 书架 借出 (1/3) ， 从 乙 书架 借出 75% 以后 ， 甲 书架上 的 书 比 乙 书架上 的 书 的 2 倍 还 多 150 本 ， 乙 书架 原有 书 多少 本 ？ （ 列式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19924", "content": "352.46 - 35.58 - 65.93 - 76.07 - 24.42 = ．", "knowledge": ["-"], "difficulty": 0.3, "length": 9}
-{"question_id": "12376", "content": "一 个数 的 48% 比 2.4 / 1.2 多 2 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5563", "content": "学校 新购 来 5 套 课桌椅 ， 一张 桌子 要 82 元 ， 一把 椅子 要 54 元 ， 学校 买 这些 课桌椅 共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17569", "content": "一 个数 的 6 倍 加上 这个 数 的 1.5 倍 等于 52.5 的 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19812", "content": "公园 里 有 柳树 60 棵 ， 比 松树 的 棵 数多 (2/3) ， 公园 里 有 松树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21139", "content": "(1/8) * (2/5) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4517", "content": "张 大爷 坚持 跑步 锻炼 ， 每天 6 圈 ． 跑 半圈 大约 用 了 2 分钟 ， 照 这个 速度 ， 张 爷爷 每天 跑步 要 用 多长时间 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11130", "content": "一 辆 汽车 每 小时 行驶 60 千米 ， 共 行驶 了 6 小时 ， 途中 停车 1 小时 ， 这辆 车 共 行驶 了 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12136", "content": "六年级 （ 1 ） 班 今天 除 2 人 请 病事假 外 ， 其余 38 人 都 到校 上课 ， 这个 班 今天 出勤 的 人数 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8284", "content": "一 条 路 第一天 修 了 (5/8) ， 第 二 天 修 了 (2/8) ， 还 剩 ( ( ( ) ) / ( ( ) ) ) 多少 没 修 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2218", "content": "师徒 二 人 同时 生产 一批 机器 零件 ， 6 小时 完成 ， 师傅 生产 了 336 个 ， 徒弟 生产 了 288 个 ， 平均 每 小时 师傅 比 徒弟 多 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9332", "content": "一 辆 汽车 和 一辆 自行车 同时 从 甲 、 乙 两地 相向 出发 ， 4 小时 后 两车 在 途中 相遇 ， 甲 、 乙 两地 相距 240 千米 ， 汽车 每 小时 行 45 千米 ． 自行车 每 小时 行 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13858", "content": "小 明 的 爸爸 买 了 3000 元 的 国家 建设 债券 ， 定期 3 年 ， 如果 年利率 是 2.89% ， 到期 时 他 可以 获得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14017", "content": "一 个 果园 ， 去年 共 收 苹果 95 吨 ， 今年 的 产量比 去年 多 20% ， 今年 可 收 苹果 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19715", "content": "六年级 有 男生 320 人 ， 男生 与 女生 人数 的 比 是 8 ： 7 ， 女生 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17903", "content": "养鸡场 共 养鸡 3000 只 ， 其中 的 (3/5) 是 蛋鸡 ． 蛋鸡 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12456", "content": "某 车间 计划 生产 3600 个 零件 ， 已经 生产 了 2400 个 ． 剩下 的 要 在 4 天 内 完成 ， 平均 每天 要 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6459", "content": "化肥厂 上 月 计划 用水 500 吨 ， 实际 用水 450 吨 ． 节约用水 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10096", "content": "盒子 中 有 红 、 绿 两种 颜色 的 球 若干个 ， 其中 红球 有 42 个 ， 占 总数 60% ， 再 放入 多少 个 绿 球 后 ， 绿 球 占 原来 总数 的 50% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21001", "content": "五年级 甲班 有 男生 18 人 ， 女生 24 人 ， 男生 人数 占 全班 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20317", "content": "菜场 运 来 白菜 (11/3) 吨 ， 运 来 黄瓜 是 白菜 的 (9/11) ， 运 来 的 萝卜 比 黄瓜 多 (1/6) ， 运 来 的 萝卜 比 黄瓜 多 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11577", "content": "一 项 工作 ， 甲 单独 做 需 (3/5) 小时 完成 ， 乙 单独 做 需 0.4 小时 完成 ． 如果 甲 、 乙 合 做 ， 那么 多少 小时 就 能 完成 这项 工作 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16540", "content": "电视机厂 计划 全年 生产 电视机 10 万台 ， 实际 增产 (1/20) ， 实际 生产 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19322", "content": "文字 题 ： 一个 数 的 (4/5) 比 15 的 60% 少 3 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22091", "content": "某校 有 1200 名 学生 ， 今年 毕业 200 人 ， 又 新 招生 260 人 ， 增加 学生 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16839", "content": "把 5 个 ○ 摆 成 一排 ， 在 每 两个 ○ 中间 摆 一个 △ ， △ 有 多少 个 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3338", "content": "甲 ， 乙 两地 相距 936 千米 ， 一辆 汽车 3 小时 行 了 216 千米 ， 照 这样 的 速度 ， 这辆 汽车 从 甲地 开往 乙地 还 需要 几小时 才能 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17560", "content": "6 （ 1 ） 班 有 25 人 参加 了 语文 和 数学 兴趣小组 ． 参加 语文 兴趣小组 的 有 15 人 ， 参加 数学 兴趣小组 的 有 18 人 ， 语 数 兴趣小组 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11842", "content": "水果店 购进 苹果 30 箱 ， 苹果 的 箱 数 比 梨子 箱 数 少 (1/6) ． 水果店 购进 梨子 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21075", "content": "除数 和 商都 是 0.9 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3929", "content": "沙漏 是 古代 的 一种 计时 工具 ． 一种 正方体 箱 型 沙漏 的 棱 长 是 12 dm ， 已知 平均 每 小时 漏 沙 72 dm ^ 3 ， 照 这样 计算 ， 多少 小时 漏光 一箱 沙 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11072", "content": "世界 上 最大 的 鸟 是 鸵鸟 ． 一个 鸵鸟蛋 约 重 (3/2) 千克 ， 一个 鸡蛋 的 质量 是 它 的 (1/25) ， 一个 鸡蛋 大约 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18728", "content": "一 个 钢铁厂 在 某 星期 内 ， 前 3 天 共 炼钢 424.5 吨 ， 后 4 天 每天 炼钢 174.75 吨 ， 平均 每天 炼钢 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10905", "content": "陈 平 同学 带 了 780 元 钱 去 买 残疾人 亚运会 开幕式 门票 ， 买 了 15 张 ， 还 剩 30 元 ， 残疾人 亚运会 开幕式 门票 每张 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16696", "content": "有 一个 正方形 容器 ， 边长 是 25 厘米 ， 里面 注满 了 水 ， 有 一根 长 50 厘米 ， 横截面 是 12 平方厘米 的 长方体 铁棒 ， 现 将 铁棒 垂直 插入 水中 ． 问 ： 会 溢出 多少 立方厘米 的 水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4651", "content": "一 种 方便面 每 袋 (3/25) 千克 ． 小 明 到 超市 买 了 2 袋 ． 他 弟弟 吃 了 (3/2) 袋 ． 弟弟 吃 了 多少 千克 方便面 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19697", "content": "小 明 有 15 张 邮票 ， 小强 的 邮票 张 数 是 小 明 的 3 倍 还 多 5 张 ， 小强 有 多少 张 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14369", "content": "图书室 有 故事书 356 本 ， 今天 借出 78 本 ， 还 回 44 本 ． 现在 图书室 有 故事书 多少 本 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5917", "content": "一 张 桌子 售价 97 元 ， 比 一把 椅子 售价 的 3 倍 多 1 元 ， 一把 椅子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18411", "content": "一 个数 的 (5/8) 是 45 ， 这个 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2222", "content": "刘 明 将 300 元 压岁钱 存入 银行 定期 3 年 ， 如果 年利率 是 2.5% ， 到期 后 他 准备 将 本息 捐献 给 南方 雪 灾区 ， 则 可 向 灾区 捐 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3963", "content": "有 一 本书 ， 第一天 看 了 20 页 ， 第 二 天 看 了 这 本书 的 (1/5) ， 如果 再 看 8 页 ， 正好 看 完 这 本书 的 (2/3) ， 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8156", "content": "学校 饭堂 买来 一袋 大米 ， 第一天 吃 了 10% ， 第 二 天 吃 了 8 千克 ， 还 剩下 14.5 千克 ． 这 袋 大米 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2893", "content": "一 种 收音机 每 台 原价 120 元 ， 降价 15% 后 ， 现在 每 台 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "197", "content": "甲乙 两地 相距 560 千米 ， 两辆 汽车 同时 从 两地 相对 开出 ， 4 小时 相遇 ， 甲 车 每 小时 行驶 75 千米 ， 乙 车 每 小时 行使 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8539", "content": "一 堆 煤 ， 用 去 总数 的 (1/5) ， 还 剩 这 堆 煤 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4669", "content": "蓝天 小学 六年级 有 女生 120 人 ， 男生 比 女生 多 15% ， 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7830", "content": "从 3 名 男生 和 4 名 女生 中 选出 一对 乒乓球 混合双打 选手 ， 有 多少 种 不同 的 组队 方案 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15116", "content": "锯 一块 木料 ， 锯 4 段 需 12 分钟 ， 锯 7 段 需 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4378", "content": "食堂 有 大米 250 千克 ， 如果 每天 吃 它 的 (1/10) ， 多少 天 可以 吃 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17536", "content": "一 列 火车 平均 每 小时 行驶 110 千米 ， 已经 行驶 了 18 小时 ， 这 列 火车 从 出发 到 现在 行驶 了 多长 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16122", "content": "光明 小学 6 （ 1 ） 班 有 男生 21 人 ， 女生 的 人数 是 男生 的 (6/7) ， 全班 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "764", "content": "百合花 有 360 朵 ， 玫瑰花 比 百合花 少 10% ， 玫瑰花 有 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9085", "content": "矿泉水 每桶 重 21 千克 ， 售价 12 元 ． 学校 买 23 桶 这样 的 矿泉水 ， 需要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18012", "content": "从 甲地 到 乙地 客车 要 10 小时 ， 货车 要 15 小时 ． 现在 两车 分别 从 两地 相对 开出 ， 相遇 时 客车 正好 行 了 240 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10888", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 计划 每 小时 行驶 80 千米 ， 5 小时 到达 ． 实际 每 小时 行驶 100 千米 ， 实际 提前 几小时 到达 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17128", "content": "王明 把 500 元 存入 银行 ， 定期 2 年 ， 年利率 2.2% ， 到期 时 ， 他 可以 从 银行 取回 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3410", "content": "从 4 里面 连续 减去 多少 个 0.05 ， 才 剩下 1 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19828", "content": "笑笑 和 淘淘 给 校园 里 所有 的 树林 浇水 ． 笑笑 浇 了 (3/9) ， 淘淘 浇 了 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9810", "content": "现有 含盐 8% 的 盐水 40 kg ， 要 将 盐水 配成 含盐 20% ， 需要 向 盐水 中 加盐 多少 kg ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17825", "content": "校园 里 有 杨树 20 棵 ， 柳树 是 杨树 的 (9/10) ， 槐树 是 柳树 的 (2/3) ． 槐树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19801", "content": "一 匹 布 长 60 米 ， 做 一件 衣服 用布 (7/10) 米 ， 现在 已经 做 了 这样 的 衣服 40 件 ， 还 剩 布 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22335", "content": "一 堆 煤 如果 用 7 辆 载重 2.5 吨 的 卡车 运 ， 4 次 刚好 运 完 ． 现在 改用 载重 5 吨 的 卡车 一次 运 完 ， 需要 多少 辆 卡车 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20346", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 50 千米 ， 6 小时 可以 到达 ， 返回 时 ， 每 小时 行 60 千米 ， 几小时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12978", "content": "人造地球 卫星 每秒 运行 8 千米 ， 比 宇宙飞船 的 速度慢 (17/57) ． 宇宙飞船 每秒 运行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19877", "content": "一 堆 砖 ， 用 去 它 的 (3/10) 后 ， 又 增加 了 340 块 ， 这时 砖 的 总 块 数 是 原来 没有 用 时 的 块 数 的 (9/8) ． 这 堆 砖 原有 多少 块 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8329", "content": "1.4477 / 0.0031 - 19.816 * 10.25 + 36.114 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8938", "content": "学校 举行 “ 小 制作 ” 比赛 ． 三年级 有 40 人 参赛 ， 四年级 参赛 的 人数 比 三年级 多 15 人 ， 五年级 参赛 的 人数 是 3 、 四年级 总 人数 的 2 倍 ． 五年级 有 多少 人 参赛 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15415", "content": "某班 男生 人数 与 女生 人数 的 比 是 3 ： 2 ， 则 男生 人数 占 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "187", "content": "一 条 500 米 长 的 路 ， 修路 队 已经 修 了 380 米 ， 剩下 的 要 在 5 天 内 修 完 ， 每天 应该 至少 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17919", "content": "2 千克 香蕉 售价 13 元 ． 妈妈 打算 买 8 千克 香蕉 ， 需要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5883", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 全程 的 (5/7) ， 这 是 离 乙地 还有 80 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21730", "content": "甲 有 45 枝 铅笔 ， 其中 红 铅笔 的 占 (4/9) ， 乙 有 铅笔 的 枝 数 是 甲 红 铅笔 枝 数 的 3 倍 ， 乙 铅笔 枝 数 比 甲 多 多少 枝 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11168", "content": "一 辆 旅游车 和 一辆 卡车 同时 从 南京 出发 ， 沿 泸 宁 高速公路 开往 上海 ． 3 小时 后 ， 旅游车 行驶 了 243 千米 ， 卡车 行驶 了 216 千米 ， 卡车 平均 每 小时 比 旅游车 少 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3767", "content": "甲 ， 乙 两地 相距 450 千米 ， 一辆 汽车 从 甲地 出发 ， 每 小时 行 80 千米 ， 已经 行 了 3 小时 ， 还要 行 多少 千米 才能 到达 乙地 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4686", "content": "一 瓶 “ 镇江 香醋 ” 吃 去 (1/2) 千克 ， 刚 好吃 去 (4/5) 这 瓶 醋 原有 多少 千克 ？ 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16725", "content": "把 一根 2 米 长 的 绳子 对折 后 ， 再 对折 ， 然后 沿着 折痕 剪开 ， 得到 的 绳子 每 段 有 多长 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6219", "content": "某 厂 运 来 一批 煤 ， 每天 用 煤 12.5 吨 ， 8 天 用 完 ． 如果 每天 用 煤 10 吨 ， 可以 多用 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22693", "content": "某 工厂 有 职工 500 人 ， 其中 男 职工 占 45% ， 女职工 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22505", "content": "某 商店 运 来 一批 电动车 ， 卖出 50 辆 ， 又 运进 120 辆 ， 现在 比 原来 多 20% ， 原来 运进 多少 辆 电动车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12889", "content": "篮球 队员 张 强 在 一次 投篮 训练 中 ， 命中 12 球 ， 命中率 刚好 为 60% ， 问 张 强 有 几个 球 没有 投进 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20126", "content": "“ 希望工程 ” 举办 一个 书画 ， 举行 捐献 拍卖会 ， 李先生 捐献 一幅 书画 第一次 叫作 3000 元 ， 往后 每次 的 叫作 比 上 一次 增加 200 元 ， 第 12 次 叫作 成交 卖出 ， 卖出 的 价格 = 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3876", "content": "一 件 上衣 现在 售价 120 元 ， 比 原价 便宜 40 元 ， 这件 上衣 现价 比 原价 便宜 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15499", "content": "计划 造林 12 公顷 ， 实际 造林 15 公顷 ， 实际 造林 比 计划 造林 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10688", "content": "自动扶梯 匀速 向上 行使 ， 甲乙 两 人 同时 从 扶梯 底部 到达 楼上 ， 甲 速度 是 乙 的 2 倍 ． 当 甲 走 了 27 级 到达 楼上 时 ， 乙 走 了 18 级 ． 问 扶梯 露 在 外面 部分 有 多少级 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1594", "content": "联想 电脑 专卖店 有 一批 电脑 ， 已经 卖 了 一部分 ， 已 卖 的 是 剩下 的 2 / 3 ， 当 再 卖 80 台 时 ， 已 卖 的 和 剩下 的 比 是 4 ： 1 ， 还 剩 多少 台 电脑 没 卖 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "17307", "content": "某 服装厂 一月份 计划 生产 5000 套 童装 ， 实际 生产 了 5800 套 ， 实际 比 计划 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19177", "content": "一 种 皮衣 现在 每件 售价 640 元 ， 比 原价 降低 了 20% ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15336", "content": "龟 兔 赛跑 ， 全程 400 米 ， 乌龟 每分钟 爬 2 米 ， 兔子 每分钟 跑 100 米 ， 发令枪 响 后 ， 兔子 遥遥领先 ， 很 骄傲 ， 在 途中 美美 地 睡 了 一 觉 ， 结果 乌龟 到达 终点 时 ， 兔子 离 终点 还有 50 米 ， 兔子 途中 睡 了 多少 分钟 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10151", "content": "将 a 组 人数 的 (1/5) 给 b 组 后 ， 两组 人数 相等 ， 原 a 组 比 b 组 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8814", "content": "高高 有 7 张 贺年片 ， 他 给 兴 兴 2 张 贺年片 后 ， 他俩 的 贺年片 数 一样 多 ． 兴 兴 原来 有 几张 贺年片 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3083", "content": "庆 6 一 活动 ， 幼儿园 买 回 400 份 奖品 ， 分给 8 个 班 后 ， 还 剩下 40 份 ． 平均 每班 分 得 奖品 多少 份 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20599", "content": "工厂 运 来 40 吨 煤 ， 用 去 总数 的 62.5% ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14815", "content": "一 个数 被 3 除 的 商 比 18 的 (1/3) 多 2 ， 求 这个 数 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17469", "content": "学校 准备 购买 电脑 ， 1 万元 能 买 2 台 ， 现有 经费 20 万元 ， 能够 买 这样 的 电脑 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "354", "content": "一 列 快车 从 a 市 到 b 市 要 12 小时 ， 平均 每 小时 行 112 千米 ． 另 一列 慢车 每 小时 行 84 千米 ． 它 从 a 市 到 b 市 要 多长时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3791", "content": "新星 小学 有 学生 680 人 ， 只有 5% 的 学生 没有 参加 意外事故 保险 ． 参加 意外事故 保险 的 学生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "194", "content": "一 批 零件 ， 师傅 每天 加工 8 小时 ， 15 天 完成 ； 徒弟 每天 加工 9 小时 ， 20 天 完成 ． 如果 二 人 合作 ， 每人每天 都 加工 6 小时 ， 需要 几天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "10567", "content": "7 / 9 = ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22370", "content": "玩具厂 计划 生产 “ 遥控 模型飞机 ” 1600 架 ， 已经 生产 了 4 天 ， 每天 生产 235 架 ， 还要 生产 多少 架 才能 完成 任务 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1419", "content": "一 辆 汽车 以 每 小时 40 千米 的 速度 从 甲地 开往 乙地 ， 行 了 全程 的 20% 后 ， 又 行 了 (3/2) 小时 ， 这时 ， 未 行 的 路程 与 已 行 的 路程 的 比 是 3 ： 1 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5518", "content": "小 聪 今年 5 岁 ， 爷爷 今年 65 岁 ， 明年 爷爷 的 年龄 是 小 聪 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14848", "content": "汽车 原来 有 37 人 ， 到 小 庄 站 下去 19 人 ， 到 新村 站 又 上来 8 人 ． 现在 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20023", "content": "2001 年 7 月 13 日 ， 北京 成功 取得 了 2008 年 奥运会 的 主办权 ． 在 第 二 轮 投票 的 105 张 有效票 中 ， 北京 获得 56 票 ． 北京 的 得票数 占 有效票 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21532", "content": "某 4 个数 的 平均值 是 30 ， 把 其中 一个 改为 50 ， 平均值 为 40 ， 这个 数 原来 = ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "73", "content": "校园 里 栽 的 杨树 是 松树 的 (3/4) ， 栽 的 松树 是 柳树 的 (4/5) ， 已知 栽 了 120 棵 杨树 ， 校园 里 栽 了 多少 棵 柳树 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20913", "content": "小 明 和 东东 同时 从 各自 家里 出发 到 学校 ， 小 明 每分钟 走 64.5 米 ， 东东 每分钟 走 75.5 米 ， 22 分钟 后 两 人 同时 到达 学校 ． 小 明 和 东 东家 最远 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21523", "content": "已知 两个 因数 的 积 是 10.8 ， 其中 一个 因数 是 24 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15502", "content": "一 种 电视机 原价 3500 元 / 台 ， 商场 在 春节 期间 进行 促销 活动 ， 降价 (1/7) ， 活动 结束 后 又 加价 (1/4) ， 这种 电视机 现价 多少 钱 一台 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3596", "content": "小 红 有 36 张 邮票 ， 小 新 的 邮票 是 小 红 的 (5/6) ， 小 明 的 邮票 是 小 新 的 (4/5) ， 小 明 有 多少 张 邮票 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "783", "content": "纺织厂 有 女工 50 人 ， 比 男工 多 25% ， 这个 厂 有 男工 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6463", "content": "一 辆 公共汽车 到 站 时 ， 有 15 人 下车 ， 留在 车厢 里 的 乘客 人数 是 下车 人数 的 2 倍 ， 车厢 里 原来 有 乘客 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9333", "content": "有 21 个 苹果 平均 分给 7 个 小朋友 ， 每个 小朋友 分 得 全部 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12970", "content": "光明 小学 4 、 5 、 六年级 各 有 3 个 班 ： 在 一次 为 地震 灾区 捐款 时 ， 四年级 捐 180.2 元 ， 五年级 捐 250.8 元 ， 六年级 捐 325 元 ． 平均 每班 捐 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "436", "content": "某班 有 40 名 学生 ， 其中 15 名 参加 数学 小组 ， 18 人 参加 航模 小组 ， 有 10 人 两个 小组 都 参加 ， 那么 有 多少 人 两个 小组 都 不 参加 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15784", "content": "一 个数 的 4 倍 是 276 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15776", "content": "光明 小学 三年级 种树 80 棵 ， 四年级 种 的 棵 数 是 三年级 的 2 倍 ， 五年级 种 的 比 四年级 多 12 棵 ． 五年级 种树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13768", "content": "养鸡场 共养 母鸡 485 只 ， 比 公鸡 的 只 数多 156 只 ， 小鸡 的 只 数 是 公鸡 的 3 倍 ， 养鸡场 共养 小鸡 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18123", "content": "1 美元 兑换 人民币 6.2 元 ． 用 500 美元 可兑换 人民币 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2411", "content": "把 300 克 药粉 放入 1300 克 水中 ， 药粉 占 药水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1020", "content": "甲乙 两车 同时 从 a 、 b 两地 相对 开出 ， 4 小时 相遇 ． 相遇 后 乙 车 继续 前行 5 小时 到达 a 地 ． 甲 车 每 小时 行 70 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10605", "content": "学校 器材 室 有 足球 35 个 ， 篮球 个数 比 足球 少 6 个 ， 两种 球 共有 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8548", "content": "一 辆 汽车 6 小时 行 全程 的 (3/8) ， 行 完全 程 共 要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7882", "content": "一 辆 小汽车 ， 每 升 汽油 可以 行驶 12.5 千米 ， 车 中 还有 5 升 汽油 ， 如果 要 行驶 240 千米 ， 至少 还要 再 加 汽油 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6328", "content": "小 刚 和 小苗 要 做 600 个 零件 ． 小 刚 每 时 做 15 个 ， 小苗 每 时 做 20 个 ． 小 刚 做 了 8 时 后 ， 余下 的 由 小苗 独立 完成 ， 小苗 再 做 多少 时 能 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13145", "content": "小 丽 看 一本 故事书 ， 她 每天 看 (1/15) ， 多少 天 才能 看 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8059", "content": "弟弟 有钱 14 元 ， 哥哥 有钱 10 元 ． 哥哥 要 给 弟弟 多少 元 ， 弟弟 的 钱 才 比 哥哥 多 2 倍 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1717", "content": "回收 1 千克 废纸 可 生产 0.8 千克 再生纸 ． 我们 班 有 45 人 ， 如果 每人 回收 1.6 千克 的 废纸 ， 可以 生产 多少 千克 的 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14570", "content": "希望 小学 六年级 男生 中 喜欢 足球运动 的 占 男生 人数 的 35% ， 喜欢 篮球运动 的 占 男生 人数 的 20% ， 喜欢 足球运动 的 男生 比 喜欢 篮球运动 的 多 27 人 ． 希望 小学 六年级 男生 共有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21678", "content": "小学 有 男生 420 人 ， 女生 比 男生 多 (1/5) ， 男生 比 女生 少 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11648", "content": "一 桶 花生油 6 千克 ， 第一次 倒 出 油 的 (1/3) ， 第 二 次 倒 出 (1/5) 千克 ， 桶 内 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11351", "content": "甲乙 两车 从 相距 140 千米 的 两地 同时 同 向 而 行 ， 甲 车 在 前 ， 每 小时 行驶 45 千米 ； 乙 车 在 后 ， 每 小时 行驶 65 千米 ， 乙 车 追 上 甲 车 需要 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6211", "content": "我校 阳光 体育 兴趣 活动 中 ， 参加 篮球队 的 有 148 人 ， 乒乓球队 的 人数 比 篮球队 的 (1/4) 少 3 人 ． 乒乓球队 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16778", "content": "电教室 需要 粉刷 的 面积 为 120 平方米 ， 如果 每平方米 需用 涂料 0.6 升 ， 在 实际 粉刷 时 有 10% 的 损耗 ， 共 需 涂料 多少 升 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "858", "content": "跳绳 比赛 中 ， 刘 红 跳 了 160 下 ， 李 明 跳 的 下 数 是 刘 红 的 (4/5) ， 张 华 跳 的 下 数 是 李 明 的 (7/8) ， 张 华 跳 了 多少 下 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6313", "content": "一 个 养蜂 专业户 ， 今年 饲养 蜜蜂 24 箱 ． 去年 5 箱 蜜蜂 酿 了 375 千克 蜂蜜 ， 照 去年 的 酿蜜 量计算 ， 今年 可以 酿 多少 千克 蜂蜜 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14278", "content": "三年级 一班 有 25 人 订阅 了 《 趣味 数学 》 ， 22 人 订阅 了 《 少年 科技报 》 ， 有 9 人 两种 刊物 都 订阅 了 ， 还有 10 人 两种 刊物 都 没 订阅 ． 你 知道 他们 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "23080", "content": "同学 们 进行 越野赛跑 ， 小兵 跑 了 全程 的 (1/3) ， 离 终点 还有 1 千米 ， 这次 越野 的 全程 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21804", "content": "用 80 个 8 连 加 的 和 除 640 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20460", "content": "一 个 圆形 花坛 ， 周长 60 米 ， 每隔 4 米 摆 一 盆花 ， 那么 摆满 这个 花坛 一共 要 多少 盆花 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3157", "content": "一 批 货物 ， 运走 10.5 吨 ， 比 剩下 的 少 2.6 吨 ， 这 批 货物 原有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15663", "content": "汽车 从 甲 城 到 乙 城 ， 平均 每 小时 行 45 千米 ， 4 小时 可以 到达 ， 如果 要 提前 1 小时 到达 ， 每 小时 比 原来 多行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22288", "content": "饲养场 养 了 绵羊 175 只 ， 山羊 的 只 数 是 绵羊 的 32 倍 ． 养 了 绵羊 与 山羊 共 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17361", "content": "一 只 山雀 每天 大约 能 吃掉 160 条 害虫 ， 一只 啄木鸟 8 天 吃掉 的 虫子 数 与 这种 山雀 6 天 吃掉 的 虫子 数 相同 ． 那么 一只 啄木鸟 每天 能 吃 多少 条 害虫 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15509", "content": "妈妈 上 月 的 总收入 是 1300 元 ， 按 国家有关 税法 的 规定 ： 超过 800 元 的 部分 要 缴纳 5% 的 个人所得税 ， 妈妈 这个 月 应 缴纳 多少 元 的 税金 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21717", "content": "小 华 妈妈 到 水果 商店 买 了 香蕉 和 苹果 各 3 千克 ， 共 花 了 25.5 元 ， 香蕉 每千克 4.5 元 ． 苹果 每千克 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11557", "content": "妈妈 买 菜花 了 15.8 元 ， 还 剩下 34.2 元 ， 妈妈 带 了 多少 元 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9562", "content": "2007 年 ， 上海 体育 盛事 不断 ， 女足 世界杯 、 田径 黄金 大奖赛 、 特奥会 等 重大 赛事 相继 举办 ， 促进 了 上海 体育运动 的 开展 ． 我 区 “ 友谊 学校 ” 是 体育 传统 校 ， 全校 1200 名 学生 中 ， 体育 爱好者 占 了 (4/5) ， 在 体育 爱好者 中 ， 足球 爱好者 又 占 到 (1/3) ， 试问 该 学校 有 多少 名 学生 是 足球 爱好者 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9453", "content": "小 明 集邮票 320 张 ， 送给 小 峰 20 张 后 ， 还 比 小 峰 多 8 张 ， 原来 小 峰 有 多少 张 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4627", "content": "把 36 连 加 20 次 ， 结果 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8817", "content": "去年 农业 收入 是 30 万元 ， 今年 收入 比 去年 增产 15% ， 增产 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21849", "content": "一 辆 卡车 从 a 地 开往 b 地 ， 每 小时 行 45 千米 ， 要 5 小时 到达 ． 如果 要 3 小时 到达 ， 每 小时 要 多行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10193", "content": "一 个 三角形 的 面积 是 17 cm ^ 2 ， 高 是 5 cm ， 底边 长 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3980", "content": "夏天 ， 商店 里 有 一双 皮 棉鞋 ， 原 售价 940 元 ， 为了 资金周转 快 ， 精明 的 老板 决定 打 0.55 销售 ， 这样 仍 可 获利 117 元 ， 这 双 皮 棉鞋 进价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8225", "content": "王 叔叔 家 养鸡 20 只 ， 养 的 鸭 比 鸡 多 (3/5) ， 鸭 比 鸡 多 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16964", "content": "差 和 减数 都 是 16.85 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14306", "content": "花 店里 有 红花 65 朵 ， 黄花 25 朵 ． 每 5 朵 扎 一束 ， 一共 可以 扎 多少 束 花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16731", "content": "李 明 同学 有 72 枚 邮票 ， 小 新 的 邮票 是 李 明 的 (5/6) ， 张 刚 的 邮票 又 是 小 新 的 (3/4) ， 张 刚 有 多少 枚 邮票 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2257", "content": "用 两台 拖拉机 耕地 24.5 公顷 ， 甲 拖拉机 3 天 耕地 4.5 公顷 ， 乙 拖拉机 5 天 耕地 10 公顷 ， 若 两台 拖拉机 同时 开始 工作 ， 多少 天 耕 完 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8005", "content": "同学 们 进行 野外 活动 ， 共 行 26 千米 ， 前 2.5 小时 在 平地上 行走 ， 平均 每 小时 行 5 千米 ， 后来 在 山地 上 行走 ， 平均 每 小时 行 3 千米 ， 在 山地 行走 了 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12327", "content": "9.9 + 9.99 + 9.999 + 9.9999 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11067", "content": "某校 六年级 有 男生 750 人 ， 占 全年 级 人数 的 (3/5) ． 六年级 共有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12443", "content": "用 汽车 将 一批 物资 运往 灾区 ， 第一次 运走 总数 的 (2/5) ， 第 二 次 运走 余下 的 (1/3) ， 这时 还 剩下 20 吨 ． 这 批 物资 一共 有 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3409", "content": "一 种 大豆 (3/4) 千克 可 榨油 (1/5) 千克 ． 照 这样 计算 ， 榨 1 千克 油 需要 大豆 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4053", "content": "书架 的 上层 有 7 本 科技 书 ， 下层 有 6 本 动漫 书 ， 每次 从 书架上 任意 取 一本 科技 书 和 一本 动漫 书 ， 共有 多少 种 不同 的 取法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6644", "content": "水果 批发 公司 有 水果 25000 千克 ， 卖出 (2/5) ， 卖出 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10978", "content": "两个 数 的 差 是 4.1 ， 如果 被减数 增加 0.2 ， 减数 减少 0.7 ． 差 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18468", "content": "一 个 正方形 的 边长 是 15 厘米 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7126", "content": "一 套 童装 用布 2.7 米 ， 做 50 套 童装 ， 需要 多少 米 布 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7582", "content": "一 辆 汽车 0.5 小时 行 35 千米 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7131", "content": "一 列 火车 的 速度 是 180 千米 / 时 ， 一辆 小汽车 的 速度 是 这 列 火车 速度 的 (5/9) ， 是 一架 飞机 的 速度 的 (1/9) ， 则 这 架飞机 的 速度 为 多少 千米 / 时 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13603", "content": "客车 和 货车 分别 从 相距 840 千米 的 两站 同时 相对 开出 ， 6 小时 在 途中 相遇 ． 已知 客车 每 小时 行 80 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9748", "content": "一 根 木头 15 米 ， 把 它 平均 分成 5 段 ， 共 需 16 分钟 ， 如果 把 它 平均 分成 8 段 ， 共 需 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11670", "content": "王老师 有 2 件 上衣 ， 3 条 裙子 ． 在 穿 这些 上衣 和 裙子 时 ， 共有 多少 种 不同 的 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "498", "content": "参加 儿童 书法 的 有 15 名 学生 ， 参加 合唱队 的 人数 是 参加 儿童 书法 人数 的 7 倍 ． 参加 合唱队 有 多少 名 学生 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20723", "content": "办公室 买进 一批 复印纸 ， 计划 每天 用 60 张 ， 可以 用 20 天 ． 由于 重视 了 节约 用纸 ， 实际 用 了 25 天 ， 实际 每天 用 了 多少 张 纸 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19665", "content": "288 里面 有 多少 个 8 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9886", "content": "欢欢 和 乐乐 两位 同学 在 一起 统计 本学期 数学 作业 得 “ 优 ” 的 次数 ． 欢欢 说 ： “ 我 得 了 18 次优 ” ． 乐乐 说 ： “ 你 真 行 ！ 比 我 还 多 (1/5) ． ” 请问 乐乐 本学期 数学 作业 得 优 多少 次 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9135", "content": "一 节 课 有 (2/3) 小时 ， 学生 讨论 用 (1/5) 小时 ， 教师 讲解 用 (3/10) 小时 ， 剩下 的 时间 用来 做作业 ． 做作业 用 了 多长时间 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8259", "content": "在 计算 （ (3/7) + (5/11) ） * 11 * 14 时 ， 运用 多少 律 比较简单 ， 结果 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12466", "content": "计算 ： 24 / [ (28/5) * ( 21 - (2/7) ) ] = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5653", "content": "一 本书 有 200 页 ， 李 刚 看 完 这 本书 的 (3/8) ， 那么 他 看 了 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10198", "content": "红红 看 一本 140 页 的 故事书 ， 已经 看 了 全书 总 页数 的 (4/7) ． 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10805", "content": "小 红 看 一 本书 ， 每天 看 25 页 ， 4 天 正好 看 完 ， 另 一 本书 的 页数 是 这 本书 的 3 倍 ， 另 一 本书 有 多少 页 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6170", "content": "一 种 彩电 原价 4200 元 ， 现在 降价 30% ， 现在 每 台 彩电 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5236", "content": "一 桶 水 连 桶 重 17.75 千克 ， 将 水 倒 出 (1/3) 后 ， 连 桶 重 12.25 千克 ， 空桶 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4721", "content": "果园 将 15000 千克 苹果 每 15 千克 装 一箱 ， 平均 送到 40 个 水果 商店 ， 每个 水果 商店 应 送 几箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21821", "content": "一 批 零件 有 1000 个 ， 经检测 有 40 个 不 合格 ， 为了 使 合格率 尽快 达到 98% ， 至少 要 再 连续 生产 多少 个 合格 零件 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18410", "content": "一 只 鸭 重 3 千克 ， 一只 鸡 的 重量 是 鸭 的 (2/3) ， 这 只 鸡 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12308", "content": "两个 因数 的 积 是 1 ， 其中 一个 因数 是 (5/3) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4073", "content": "在 一只 大 竹筐 里 装 着 苹果 160 个 ， 梨 若干个 ， 如果 从 竹筐 里 取出 苹果 的 75% ， 取出 梨 的 (1/3) 后 ， 剩下 的 苹果 是 梨 的 (1/2) ， 求 原来 竹筐 中 有 梨 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10094", "content": "9 个 (5/6) 的 和 去除 (1/2) ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11232", "content": "6 年 一班 有 学生 45 人 ， 其中 女生 有 20 人 ． 女生 人数 占 全班 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19928", "content": "有 6 名 运动员 参加 乒乓球 比赛 ， 如果 每 2 人 打 一场 ， 一共 要 安排 多少 场 比赛 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14603", "content": "李 明 今年 储蓄 4500 元 ， 比方 华 少 40% ． 方 华 今年 储蓄 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21432", "content": "世博会 伦敦 碳 馆内 大约 用 62.8 千克 废 纸箱 就 可以 做成 4 个 沙发 ． 平均 每个 沙发 用 多少 千克 废 纸箱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13339", "content": "两站 间 的 铁路 长 400 km ． 一列 货车 和 一列 客车 同时 从 这 两站 相对 开出 ， 客车 每 小时 行 110 km ， 货车 每 小时 行 90 km ． 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6615", "content": "如果 甲 数 是 乙 数 的 4 倍 ， 那么 （ 甲 数 + 乙 数 ） / 乙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5497", "content": "有 一个 等差数列 ： 2 、 5 、 8 、 11 … 101 ， 这个 等差数列 共有 多少 项 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19151", "content": "修 一条 公路 ， 原 计划 每天 修 12 米 ， 25 天 完成 ． 实际 只用 9 天 就 完成 了 任务 ， 平均 每天 比 原 计划 多 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10653", "content": "建筑工地 有 水泥 45 吨 ， 第一次 用 去 总 吨数 的 (1/5) ， 第 二 次 用 去 总数 的 (1/3) ． 两次 共用 去 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19356", "content": "水果店 运 来 梨 42 筐 ， 占 运 来 的 水果 总数 的 (2/3) ， 共运 来 水果 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15593", "content": "四年级 一班 49 人 参加 建校 劳动 ， 平均 每个 同学 搬 砖 102 块 ， 他们 一共 搬 砖 多少 块 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8055", "content": "张师傅 加工 一批 零件 ， 98 个 合格 ， 2 个 次品 ， 合格 的 产品 占 总 加工 数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1682", "content": "实验 小学 的 环形 跑道 一圈 是 300 米 ． 张 宇 在 这个 跑道 上 跑 3 圈 用 了 6 分 ， 平均 每 分 跑 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3888", "content": "新学期 开学 了 ， 张老师 为 同学 们 购买 桌椅 ， 买 2 张 桌子 和 3 把 椅子 的 钱 同样 多 ． 每 把 椅子 56 元 ， 每张 桌子 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11987", "content": "小朋友 带 18 元 钱 去 买 文具 ， 每支 铅笔 1.2 元 ， 每 本 练习本 0.7 元 ， 每张 彩纸 0.2 元 ， 小朋友 买 了 5 支 铅笔 ， 剩下 的 钱 买 彩纸 ， 还 可以 买 几张 彩纸 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22378", "content": "1050 名 学生 到 大礼堂 听 讲座 ， 入座 后 还有 6 排座位 空 着 ， 每排 有 46 个 座位 ． 大礼堂 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18371", "content": "一 个 小数 扩大 100 倍 后 ， 所得 的 数 比 原 数 大 29.7 ． 原 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7595", "content": "一 个数 的 5.1 倍 比 它 的 4.7 倍 多 56 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "85", "content": "a 地 到 b 地 的 公路 长 384 千米 ， 两辆 汽车 从 两地 相对 开出 ， 甲 车 每 小时 行 38 千米 ， 乙 车 每 小时 行 42 千米 ． 甲 车 先 开出 64 千米 后 ， 乙 车 才 出发 ． 乙 车 出发 后 几小时 两车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15785", "content": "某 工厂 男工 人数 比 女工 人数 多 (1/9) ， 那么 这个 厂 的 女工 人数 就 占 全厂 职工 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13840", "content": "张 明 妈妈 今年 4 月 的 工资收入 是 1250 元 ， 扣除 800 元 后 按 5% 的 税率 缴 个人所得税 ． 张 明 妈妈 应 缴 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17540", "content": "一 根 绳 长 5.1 米 ， 第一次 剪 去 2.32 米 ， 第 二 次 剪 去 1.78 米 ． 两次 共 剪 去 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16075", "content": "在 一个 长 125 米 环形 的 花园 4 周 种树 ， 每隔 5 米 种 一棵 ， 一共 要 多少 棵 树 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18613", "content": "光明 机器厂 原 计划 每天 加工 340 个 零件 ， 15 天 完成 任务 ． 实际 提前 3 天 完成 任务 ， 实际 每天 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17485", "content": "同学 们 今年 植树 300 棵 ， 比 去年 多 植树 20% ， 去年 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8852", "content": "工厂 要 加工 195 个 零件 ， 已经 加工 了 5 天 ， 平均 每天 加工 24 个 ， 余下 的 要 3 天 完成 ， 平均 每天 还要 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7613", "content": "小 红 有 不同 的 上衣 5 件 ， 裤子 4 件 ， 鞋子 3 双 ， 算 一 算 ， 小 红 能 有 多少 种 不同 的 穿戴 装束 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4210", "content": "一 块 长方形 地 长 24 千米 ， 宽 是 长 的 (5/12) ， 这块 地 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15183", "content": "商店 有 16 箱 苹果 ， 每箱 重 15 千克 ， 每千克 苹果 售价 为 6 元 ， 这些 苹果 一共 可以 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11281", "content": "6 （ 1 ） 班 有 36 人 ， 这 学期 有 20 人 订阅 了 《 少年 文艺 》 ， 订阅 《 小学生 数学 报 》 的 人数 比 订阅 《 少年 文艺 》 的 人数 多 (4/5) ， 订阅 《 小学生 数学 报 》 的 人数 比 订阅 《 少年 文艺 》 的 多 多少 人 ？ 你 发现 了 什么 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6865", "content": "甲 、 乙 两地 间 的 铁路 长 696 千米 ． 一列 客车 和 一列 货车 分别 从 两地 同时 开出 ， 相对 而 行 ， 经过 4.8 小时 相遇 ． 客车 每 小时 行 75 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8755", "content": "三年级 学生 去 果园 劳动 ， 女生 有 52 人 ， 男生 有 60 人 ， 4 名 学生 分成 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12199", "content": "一 辆 卡车 ， 装 的 面粉 占 全 车 的 (1/6) ， 其余 的 是 大米 ， 装 的 大米 占 全 车 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20901", "content": "一 个 化工厂 原来 每天 用水 12.5 吨 ， 由于 改进 用水 设备 ， 每天 可 节约用水 20% ， 原来 24 天 的 用水量 现在 可用 多少 天 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12274", "content": "有 一种 自动 旋转 喷水 龙头 ， 射程 是 4 米 ， 它 能 喷洒 的 最大 面积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12438", "content": "一 件产品 的 成本 原来 是 40 元 ， 改造 工艺 后 ， 成本费 降低 了 37.5% ， 现在 这件 成本 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6817", "content": "除数 是 890 ， 商 是 830 ， 余数 是 80 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18083", "content": "面粉 加工厂 上午 加工 面粉 2500 千克 ， 下午 加工 1000 千克 ， 每 25 千克 面粉 装 一袋 ， 上午 比 下午 多 加工 多少 袋 面粉 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21216", "content": "一 根 木头 长 10 米 ， 要 把 它 平均 分成 5 段 ． 每 锯下 一段 需要 8 分钟 ， 锯 完 一共 要 花 多少 分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10766", "content": "两个 数 的 乘积 是 其中 一个 因数 的 23 倍 ， 是 另 一个 因数 的 42 倍 ， 这 两个 数 的 乘积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20779", "content": "买 5 张 桌子 和 10 把 椅子 共 400 元 ， 买 1 张 桌子 和 2 把 椅子 的 价钱 正好 相等 ． 每张 桌子 的 价钱 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7916", "content": "计算 ： 25 * 34 * 32 * 125 = ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "20495", "content": "（ 0.75 * 42.7 + 57.3 - 0.573 * 25 ） / 3 * 7972 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9964", "content": "300 - 17 与 8 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3601", "content": "水果店 运进 菠萝 540 千克 ， 比 甘蔗 的 2 倍 少 20 千克 ， 运进 甘蔗 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5329", "content": "某 手表 厂 原 计划 25 天 生产 1000 只 手表 ， 实际 每天 生产 50 只 ， 实际 多少 天 就 能 完成 任务 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4147", "content": "某 体操队 有 男队员 60 人 ， 比 女队员 多 (1/5) ． 女队员 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6171", "content": "笑笑 的 身高 是 1.25 米 ． 淘气 比 笑笑 高 0.05 米 ， 但 比 小 立 矮 0.3 米 ． 小 立 的 身高 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21224", "content": "我家 种 了 24 棵 苹果树 ， 每棵 产 苹果 25 千克 ， 这些 苹果 用 3 辆车 运出去 ， 平均 每辆车 运 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19123", "content": "某 乡镇 去年 有 小学生 16500 人 ， 今年 比 去年 减少 5% ， 今年 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17874", "content": "一 个 修路 队 修 一条 公路 ， 前 5 天 修 了 660 米 ． 按照 这样 的 工作效率 ， 又 修 了 1688 米 才 把 这 条 公路 修 完 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5240", "content": "一 个数 加上 250 得 420 ． 这个 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1745", "content": "把 一个 数 先 扩大 10 倍 ， 再 缩小 到 原来 的 (1/100) 后 结果 是 3.56 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12613", "content": "一 本书 按 0.85 出售 比 原价 便宜 了 3 元 ， 这 本书 的 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19443", "content": "7443 + 2485 + 567 + 245 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3281", "content": "4.8 与 7.2 的 积 ， 加上 一个 数 后 正好 得 100 ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10682", "content": "小 明 的 邮票 比 小林 多 60 张 ， 小 明 后来 又 购进 12 张 ， 这时 小 明 的 邮票 比 小林 多 (1/4) ， 小林 有 邮票 多少 张 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19035", "content": "学校 订购 的 软 面包 ， 计划 每天 吃 25 千克 ， 24 天 可以 吃 完 ． 实际 20 就 吃 完 了 ， 实际 每天 吃 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12049", "content": "每千克 鸡蛋 6 元 ， 现有 7 箱 鸡蛋 ， 每箱 4 千克 ， 这些 鸡蛋 一共 可以 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "438", "content": "东乡 修 了 两条 水渠 ， 第一条 长 1200 米 ， 第 二 条 比 第一条 的 (5/6) 少 50 米 ． 两条 水渠 一共 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5562", "content": "修 一条 公路 ， 原 计划 每天 修 0.56 千米 ， 实际 每天 比 原 计划 多 修 0.14 千米 ， 7 天 后 还 差 3.5 千米 没有 修 ， 这 条 路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17427", "content": "农场 收 青菜 1800 千克 ， 是 收 的 萝卜 重量 的 (5/6) ， 收 的 萝卜 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8801", "content": "一 架飞机 5 分钟 飞行 了 60 千米 ， 距离 目的地 还有 540 千米 ， 如果 按 原来 的 速度 飞行 ， 飞 完全 程 要 用 多少 时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "263", "content": "小 莉 买 了 3 个 水杯 ， 付 了 50 元 ， 找回 2.3 元 ， 水杯 的 单价 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16981", "content": "圆形 的 操场 的 一周 全长 是 1800 米 ． 如果 沿着 这 一圈 每隔 12 米 安装 一盏灯 ， 一共 需要 装 几盏 灯 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13017", "content": "一 个数 的 75% 是 15 ， 这个 数 的 (5/6) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11377", "content": "小康 有 两块 水稻田 ， 共 收 稻谷 5712 千克 ， 第一块 面积 4.8 公顷 ， 平均 每 公顷 产 稻谷 680 千克 ， 第 二 块 面积 3.4 公顷 ， 平均 每 公顷 产 稻谷 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18290", "content": "已知 两个 因数 的 积 是 10.8 ， 其中 一个 因数 是 6 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15977", "content": "从 甲地 到 乙地 共 845 千米 ， 爸爸 驾车 13 小时 赶到 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4303", "content": "国际 著名 数学 大师 陈省身 先生 生于 1911 年 ， 2011 年 是 他 诞辰 100 年 的 日子 ， 请 你 计算 下面 的 算式 19112012 * 20121910 - 19112011 * 20121911 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3461", "content": "把 一根 长 80 cm 的 木棍 全部 锯 成 8 cm 的 小 棒 ， 一 共用 了 72 秒 ， 如果 把 同样 长 的 木棍 锯 成长 5 cm 的 小 棒 ， 一共 要 用 多少 秒 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14984", "content": "有 100 個 足球 隊 ， 兩 兩 進 行 淘汰 賽 ， 最 後 產 生 一 個 冠 軍 ， 一共 要 賽 多少 場 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12544", "content": "图书馆 共有 126 本书 ， 平均 放在 3 个 书架上 ， 每个 书架 有 6 层 ． 平均 每层 放 几本 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10063", "content": "2020202 * 333 - 3030303 * 222 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12876", "content": "果园 里 有 苹果树 80 棵 ， 樱桃树 比 苹果树 少 20% ， 果园 里 有 樱桃树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21671", "content": "一 台 彩电 现价 2400 元 ， 现在 降价 25% ， 每 台 降价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "608", "content": "杨 叔叔 把 10000 元 钱 存入 银行 ， 定期 2 年 ． 如果 年利率 是 4.15% ， 利息税 是 5% ． 到期 时 他 可以 获得 本金 和 税后 利息 一共 = 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15078", "content": "一 双 运动鞋 原价 400 元 ， 现在 打 0.85 销售 ， 这 双 运动鞋 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17257", "content": "甲乙 两个 生产 小组 用 了 (3/4) 天 共同 装配 了 225 台 电视机 ， 已知 甲组 每天 装配 120 台 ， 乙组 每天 装配 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9858", "content": "某 小学 买来 120 本 故事书 ， 正好 占 买来 图书 的 (4/9) ， 学校 共 买来 图书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1791", "content": "某 粮店 新 进 一批 大米 ， 第一天 卖出 总数 的 (1/5) ， 第 二 天 卖出 120 千克 ， 这时 剩下 的 与 卖出 的 比 是 2 ： 1 ， 这 批 大米 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14631", "content": "10 月 1 日 上午 华南 摩 有 游客 985 人 ， 中午 有 541 人 离去 ， 下午 又 来 了 235 人 ， 这时 华南 摩 里 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14448", "content": "一 个 苹果园 长 24 米 ， 宽 18 米 ， 如果 每棵 苹果树 占地 3 平方米 ， 这个 苹果园 一共 有 多少 棵 苹果树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17871", "content": "苹果 每千克 8 元 ， 香蕉 每千克 6 元 ． 妈妈 买 3 千克 苹果 和 5 千克 香蕉 ， 应付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7107", "content": "某班 同学 种 了 400 颗 向日葵 ， 平均 每颗 收 葵花籽 0.25 千克 ． 如果 每千克 葵花籽 可以 榨油 0.18 千克 ， 这个 班 收 的 葵花籽 可以 榨油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11756", "content": "一 辆车 4 小时 行 全程 的 (1/5) ， 每 小时 行 全程 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4565", "content": "一 个 因数 是 120 ， 另 一个 因数 比 它 的 2 倍 还 多 44 ， 另 一个 因数 是 几 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4482", "content": "4026 * 125 * 4 + 317 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9754", "content": "把 底 面积 是 60 平方分米 ， 高 6 分 米 的 长方体 铁块 熔铸 成 一个 底 面积 是 正方形 ， 边长 为 5 分 米 的 长方体 ， 这个 长方体 的 高 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6197", "content": "一 个数 的 75% - 5 等于 1 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2904", "content": "有 306 个 苹果 ， 每 6 个 装满 一袋 ， 可以 装满 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22718", "content": "一 扇 窗户 长 1.5 米 ， 宽 1.2 米 ， 给 这 扇 窗户 安装 上 玻璃 ， 如果 每平方米 玻璃 18.5 元 ， 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21589", "content": "新光 小学 六年级 有 128 人 ， 已经 达到 体育锻炼 标准 的 占 (5/8) ， 而 达标 的 学生 的 (2/5) 是 女生 ， 达标 的 女生 共有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "629", "content": "新世纪 双语学校 共有 1200 名 学生 ， 每个 学生 每天 要 上 5 节 课 ， 每位 任课教师 每天 都 要 教 4 节 课 ， 每节课 的 课堂 上 都 有 30 个 学生 和 一位 教师 ， 这 所 学校 的 任课教师 共有 多少 位 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13843", "content": "雾 露顶 到 昆明 长 240 千米 ， 大客车 的 速度 是 60 千米 / 时 ， 小轿车 的 速度 是 80 千米 / 时 ． ， 两车 同时 从 雾 露顶 开往 昆明 ， 小轿车 先 到 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12745", "content": "甲 、 乙 两辆 汽车 分别 从 相距 460 千米 的 两地 同时 出发 ， 相向 而 行 ． 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 40 千米 ． 乙 车 在 行驶 途中 因 事故 停留 1 小时 ． 两车 几小时 后 可 要 在 途中 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3317", "content": "甲乙 两辆 汽车 分别 从 相距 220 米 的 两地 同时 出发 ， 相向 而 行 ， 经过 2.5 小时 相遇 ． 已知 甲 车 每 小时 行 45 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12618", "content": "一 辆 汽车 从 甲地 到 乙地 ， 每 小时 行 35 千米 ， 6 小时 可以 到达 ； 如果 提前 1 小时 到达 ， 每 小时 必须 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3943", "content": "一 堆 煤 ， 原 计划 每天 烧 3 吨 ， 可以 烧 96 天 ， 由于 改建 炉灶 ， 每天 节约 0.6 吨 ， 这 堆 煤 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14642", "content": "章 华 看 一本 故事书 ， 第一周 看 了 90 页 ， 正好 是 这本 故事书 的 30% ， 还 剩 多少 页 没 看 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17748", "content": "一 种 产品 ， 原来 每件 的 成本 是 80 元 ， 采用 了 新工艺 后 ， 每件 成本 降低 了 15% ． 现在 每 件产品 的 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2474", "content": "学校 图书馆 有 上下 两层 ， 管理员 从 上层 取 15 本书 放入 下层 ， 这时 下层 图书 的 数量 正好 是 上层 图书 数量 的 (5/7) ， 已知 下层 原有 图书 95 本 ， 求 上层 原有 图书 比 下层 原有 图书 多 基本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6018", "content": "张师傅 8 小时 做 160 个 零件 ， 王师傅 4 小时 做 120 个 零件 ， 张师傅 比 王师傅 平均 每 小时 少 做 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12650", "content": "甲 数 是 34507 ， 比 乙 数 少 10895 ， 乙 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21971", "content": "把 一根 铁丝 平均 剪成 10 段 ， 每 段 铁丝 是 它 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6794", "content": "电动车 商店 在 5 一 期间 搞 优惠活动 ． 1800 元 能 买 一辆 电动车 ， 比 原价 便宜 了 200 元 ． 现价 比 原价 便宜 了 百分 这 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2092", "content": "修路 队 要 修 一条 960 米 长 的 公路 ， 原 计划 20 天 完工 ． 由于 任务 急 ， 需要 16 天 完工 ． 实际 每天 比 原 计划 多 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11763", "content": "学校 课桌 有 605 张 ， 损坏 138 张 ， 又 买 加 250 张 ， 学校 现在 有 课桌 多少 张 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17414", "content": "开凿 一条 隧道 ， 甲队 单独 干 要 60 天 完成 ， 乙 队 单独 干 要 40 天 完成 ． 两队 同时 从 两侧 对 凿 ， 当 两队 还 距 整个 洞 长 的 (1/6) 时 ， 已 工作 了 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7439", "content": "一 条 公路 长 8 千米 ， 工程队 已经 修 了 6 天 ， 每天 修 (5/6) 千米 ． 还 剩 多少 千米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16237", "content": "盒子 里 有 8 个 红球 、 5 个 白 球 ， 从中 任意 摸 出 一个 球 ， 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18831", "content": "从 乐 蟠 广场 到 合水 汽车站 共 栽 有 16 根 高压 电线杆 ， 相邻 两根 的 平均 距离 是 150 米 ， 乐 蟠 广场 到 合水 汽车站 大约 有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1426", "content": "李 阿姨 把 50000 元 钱 存 人 银行 ， 存期 3 年 ， 年利率 为 5.0% ． 到期 后 李 阿姨 可 得 税后 利息 多少 元 ？ （ 税率 为 20% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22677", "content": "小张 、 小 王 、 小 李 的 不行 速度 分别 是 每分钟 100 米 、 80 米 和 70 米 ， 小张 和 小 王 从 甲地 到 乙地 ， 小 李 是从 乙地 到 甲地 ． 他们 3 人 同时 出发 ， 如果 小张 与 小 李 相遇 时 ， 他们 距离 小 王 300 米 ． 那么 从 甲地 到 乙地 的 距离 = 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1317", "content": "一 辆 长途汽车 从 甲地 开往 乙地 ， 已经 行 了 全程 的 (4/5) ， 距 乙地 还有 26 千米 ． 从 甲地 到 乙地 的 路程 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21415", "content": "新华书店 新 到 一批 儿童读物 ， 第一天 卖出 总数 的 (1/5) ， 第 二 天 卖出 总数 的 40% ， 还 余下 400 本 ， 这 批 儿童读物 一共 有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15991", "content": "富民 村 要 修 一条 公路 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 全长 的 (1/3) ， 还 剩 全长 的 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3365", "content": "3 个 加数 都 是 24 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19485", "content": "果园 里 有 桃树 210 棵 ， 占 果树 总 棵 数 的 (7/12) ， 果园 里 共有 果树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4357", "content": "水果店 运 来 一批 橘子 ， 第一天 卖出 总数 的 40% ， 第 二 天 卖出 140 千克 ， 剩下 的 与 卖出 的 质量 比 是 4 ： 3 ， 这 批 橘子 重 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18714", "content": "一 个数 的 (5/8) 是 120 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10745", "content": "水果店 运进 一批 水果 ， 卖出 14 箱 ， 每箱 30 千克 ， 还 剩 80 千克 ． 这 批 水果 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10387", "content": "有 一个 牧场 ， 养 了 30 头牛 ， 牛 的 数量 比 羊 少 (3/8) ． 养羊 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15096", "content": "一 件 上衣 500 元 ， 妈妈 持 贵宾卡 可 享受 0.85 优惠 ． 妈妈 买 这件 衣服 ， 可以 优惠 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22809", "content": "奶牛场 有 4 个 牛棚 ， 每个 牛棚 里 有 8 头 奶牛 ． 平均 每 头 奶牛 一天 喂 30 千克 饲料 ， 这些 奶牛 一天 一共 喂 多少 千克 饲料 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17437", "content": "一 根 铁丝 ， 截去 (2/9) 后 ， 还 剩 28 米 ， 这根 铁丝 原来 有 多长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8039", "content": "北京 4 环路 上 分布 着 不同 规模 的 桥梁 147 座 ． 其中 立交桥 数量 占 桥梁 总数 的 (17/49) ， 人行天桥 占 桥梁 总数 的 (2/7) ， 这 两种 桥 共有 多少 座 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2754", "content": "嘉 明 中心 小学校 六年级 参加 奥数 社团 的 有 40 人 ， 比 参加 文学 社团 人数 的 (2/5) 还 多 10 人 ， 参加 文学 社团 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4181", "content": "一 本书 ， 小张 每天 读 全书 的 (1/15) ， 5 天 后 还 剩下 60 页 没有 读 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18936", "content": "六年级 参加 植树 活动 ， 种 活 了 192 棵 ， 没 种 活 的 占 总 棵 树 的 4% ， 这次 活动 ， 六年级 种 了 多少 棵 树 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15203", "content": "甲 、 乙 两个 车队 同时 从 相隔 840 千米 的 两地 出发 相向 而 行 ， 甲 车队 每 小时 行 120 千米 ， 乙 车队 每 小时 行 160 千米 ， 一个 人 骑 摩托车 每 小时 行 180 千米 ， 在 两 车队 中间 往返 联络 ， 问 两 车队 相遇 时 ， 摩托车 行驶 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13506", "content": "“ 6 一 ” 儿童节 期间 ， 书店 搞 促销 活动 ， 原价 25 元 的 《 趣味 数学 》 只 卖 15 元 ． 这 本书 降价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22610", "content": "张 叔叔 从 甲 城 开车 送货到 乙 城 ， 以 30 米 / 时 的 速度 行驶 了 3 小时 到达 ， 返回 时 只用 了 2 小时 ， 张 叔叔 从 甲 城 到 乙 城 往返 一次 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20428", "content": "一 桶 汽油 重 50 千克 ， 倒 出 (3/8) ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13142", "content": "小 明 今天 看书 90 页 ， 比 昨天 多 (1/9) ． 问 ： 小 明 昨天 看书 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14587", "content": "一 辆 轿车 每 小时 行 85 千米 ， 3 小时 行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21805", "content": "丁丁 一家 参加 “ 蔬菜 采摘 节 ” 活动 ． 丁丁 采摘 珍珠 番茄 520 克 ， 采摘 的 水果 黄瓜 比 珍珠 番茄 少 185 克 ． 丁丁 采摘 珍珠 番茄 和 水果 黄瓜 共 多少 克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14375", "content": "小 丽 攒钱 想 买 一套 4 本 的 《 百科知识 》 丛书 ， 书价 是 23.2 元 ． 小 丽 攒 够 了 钱 去 书店 买 书 ， 刚好 碰上 书店 促销 《 百科知识 》 丛书 只 售 17.4 元 ． 小 丽 就 用 剩下 的 钱 买 了 两本 笔记本 ． 平均 每 本书 便宜 了 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7363", "content": "一 件 衬衣 如果 卖 200 元 ， 那么 可 赚 60% ； 如果 卖 150 元 ， 那么 可 赚 多少 % ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8642", "content": "把 3 缩小 到 它 的 100 倍 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16512", "content": "一 根 绳子 剪 去 它 的 (1/5) ， 正好 是 (4/5) 米 ， 这根 绳子 原来 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4697", "content": "找 规律 填 数 ， 3 、 1 、 6 、 2 、 12 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1096", "content": "筑路 队 修 一条 路 ， 原 计划 每天 修 3.2 千米 ， 45 天 可以 修 完 ， 实际 每天 修 3.6 千米 ， 多少 天 可以 修 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9329", "content": "一 件 羊绒衫 原价 850 元 ， 节日期间 商场 决定 打 0.6 销售 ， 打折 后 这件 羊绒衫 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9076", "content": "工地 有 一批 水泥 ， 第一天 运走 (2/5) ， 第 二 天 运走 35% ， 还 剩下 25 吨 ， 这 批 水泥 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2104", "content": "“ 元旦 ” 商场 搞 促销 活动 ， 小 虎 花 350 元 买 了 一台 复读机 ， 比 原来 便宜 了 50 元 ， 复读机 的 价格 降 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20809", "content": "某 超市 第一批 运进 水果 320 千克 ， 第 二 批 运进 400 千克 ， 两批 的 重量 占 超市 现有 水果 的 (2/3) ， 超市 现有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4373", "content": "e60 手机 原来 每部 成本 是 860 元 ， 现在 的 成本 比 原来 降低 了 12% ， 这种 型号 的 手机 现在 每部 的 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12065", "content": "甲 数 是 720 ， 乙 数 是 甲 数 的 (1/6) ， 甲 数 是 丙 数 的 (4/3) 倍 ． 丙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3643", "content": "张师傅 开车 到 县城 运 货物 ， 张师傅 的 家 到 县城 的 距离 是 150 千米 ， 去 时 用 了 2 小时 ， 回来 原 路 返回 ， 用 了 3 小时 ， 求 张师傅 开车 往返 的 平均速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6078", "content": "比 36 的 15 倍 少 18 的 数 是 几 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21412", "content": "一 桶 纯净水 的 净含量 是 20 升 ， 喝 了 (3/8) ， 喝 了 多少 升 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19771", "content": "停车场 有 18 辆 大客车 ， 小汽车 的 辆数 比 大客车 多 (1/6) ， 小汽车 有 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22678", "content": "三年级 有 学生 150 人 ， 四年级 的 人数 是 三年级 的 2 倍 ， 五年级 的 人数 比 3 、 四年级 的 和 少 120 人 ， 五年级 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17566", "content": "一 匹 骆驼 运货 320 千克 ， 另 一匹 骆驼比 它 多 运 25 千克 ， 两匹 骆驼 共运 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10345", "content": "2005 年 邻 山村 有 4200 户 家庭 拥有 电话 座机 ， 比 去年 增加 了 20% ， 去年 有 多少 户 家庭 拥有 电话 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7120", "content": "化工 车间 有 男 工人 56 名 ， 女 工人 42 名 ， 这个 车间 的 工人 总数 正好 是 全厂 工人 总数 的 (2/7) ， 全厂 共有 多少 名 工人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3101", "content": "4 平 家电 商场 现有 各种 品牌 的 电视机 240 台 ， 比 电冰箱 多 (1/5) ， 商场 现有 电冰箱 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1262", "content": "奥林匹克 火炬 在 中国 某省 4 天 传递 了 816 千米 ． 平均 每天 传递 了 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1446", "content": "一 张 3.5 英寸 软盘 的 容量 是 1.44 兆 ， 已经 用 了 (2/3) ， 还 剩 多少 兆 空间 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3000", "content": "修路 工人 要 修 一条 路 ， 第一天 修 了 120 米 ， 第 二 天 修 了 全长 的 (1/3) ， 两天 共 修 了 300 米 ， 这 条 路 共 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3715", "content": "王师傅 原 计划 每天 生产 28 辆 玩具车 ， 15 天 完成 ． 实际 每天 比 原 计划 多 生产 2 辆 玩具车 ， 实际 几天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20704", "content": "一 辆 货车 从 甲地 到 乙地 送货 ， 去 时 每 小时 行 45 千米 ， 8 小时 送到 乙地 ． 回来 时 每 小时 行 60 千米 ， 它 几小时 能 返回 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12950", "content": "翠竹 村 原有 桃园 565 亩 ， 梨园 185 亩 ， 现 计划 把 一部分 梨园 改成 桃园 ， 使 桃园 的 亩数 是 梨园 亩数 的 4 倍 ， 问 ： 要 把 多少 亩 梨园 改成 桃园 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7635", "content": "化肥厂 去年 下半年 生产 化肥 600 吨 ， 比 上半年 的 3 倍 少 60 吨 ． 去年 全年 共 生产 化肥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3990", "content": "小 明 家 到 学校 共有 5 条 路 可 走 ， 从 学校 到 少年宫 共有 3 条 路 可 走 ． 小 明 从 家 出发 ， 经过 学校 然后 到 少年宫 ， 共有 多少 种 不同 的 走法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12695", "content": "学校 成立 兴趣小组 ． 美术 小组 有 36 人 ， 舞蹈 小组 的 人数 比 美术 小组 人数 多 (1/4) ， 舞蹈 小组 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18828", "content": "一 辆 汽车 从 甲地 到 乙地 用 了 4.2 小时 ， 平均 每 小时 行驶 54.6 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22629", "content": "海螺 伞 厂 为 支援 玉树 抗震 赶 产 一批 帐篷 ， 第一天 生产 了 总 帐篷 数 的 20% ， 第 二 天 生产 了 总 帐篷 数 的 (7/20) ， 两天 共 生产 帐篷 4400 顶 ． 这 批 帐篷 一共 有 多少 顶 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15498", "content": "100 个 零件 中 ， 3% 是 不 合格 的 ， 取出 25 个 合格 的 零件 后 ， 不 合格 的 目前 占 了 百分之几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3140", "content": "1 吨 菜籽 可 榨油 (2/3) 吨 ， 照 这样 计算 ， 15 吨 菜籽 可 榨油 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16705", "content": "200 吨 的 (2/5) = 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13623", "content": "六年级 同学 为 灾区 捐 衣物 1800 元 ， 五年级 捐 的 数量 比 六年级 的 (11/12) 少 50 元 ， 四年级 捐 的 比 五年级 的 (5/8) 多 120 元 ． 四年级 捐 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "19829", "content": "林场 有 柳树 180 棵 ， 是 杨树 棵 数 的 (3/4) ， 林场 有 杨树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6286", "content": "华 宇 工厂 每天 节约 原料 6 千克 ， 因此 原来 7 天 的 原料 能 用 10 天 ， 现在 每天 平均 用 多少 千克 原料 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1401", "content": "星星 商店 3 月份 的 营业额 是 16 万元 ， 按 3% 缴纳 营业税 ， 应 缴纳 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20925", "content": "小 军 参加 了 暑假 游泳 班 ， 12 天 里 他 共 游 了 4800 米 ， 平均 每天 游 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13851", "content": "一 种 消毒药水 是 用 药液 和 水 按照 1 ： 200 配成 的 ． 现在 要 配制 这种 消毒药水 5025 克 ， 需要 药液 多少 克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14291", "content": "五年级 有 (1/6) 的 学生 参加 轮滑 队 ， 有 (3/8) 的 学生 参加 舞蹈队 ， 参加 轮滑 队 的 学生 比 参加 舞蹈队 的 学生 少 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10317", "content": "一 辆 玩具车 跑 12 米 大约 需要 2 分钟 ， 则 用 这样 的 速度 在 一个 半径 为 60 米 的 圆形 跑道 上 跑 一圈 需要 多少 分钟 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7170", "content": "有 一瓶 酒精 ， 第一次 倒 出 这 瓶 酒精 的 (1/3) ， 第 二 次 倒 出 这 瓶 酒精 的 25% ， 正好 倒 出 14 千克 ． 这 瓶 酒精 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6796", "content": "一 台 电视机 现 售价 6000 元 ， 盈利 20% ， 这 台 电视机 的 进货价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3434", "content": "77 + 25 + 23 + 44 + 75 + 56 = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "9381", "content": "某 商场 搞 促销 活动 ， 所有 的 商品 都 打 0.85 出售 ， 爸爸 用 了 1700 元 钱 买 回 一台 彩色 电视机 ， 这 台 电视机 比 原价 便宜 了 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11897", "content": "用 91.2 千克 花生 可以 榨出 30 千克 花生油 ． 现在 要 榨 500 千克 花生油 ， 需要 多少 千克 花生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11000", "content": "2012 年 10 月 12 日 张 叔叔 买 了 8000 元 的 国库券 （ 国库券 的 利息 不 纳税 ） ， 定期 3 年 ． 如果 年利率 是 4.76% ， 到期 时 ， 张 叔叔 可以 获得 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18414", "content": "同学 们 做习题 ， 小 华 做 了 75 道 ， 小 明 做 了 85 道 ， 小 青 比 小 华 和 小 明 的 总数 少 30 道 ， 小 青 做 了 多少 道 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16745", "content": "一 列 客车 以 每 小时 90 千米 的 速度 从 甲 站 出发 ， 4 小时 可 到达 乙 站 ， 有 一列 货车 从 乙 站 开出 ， 6 小时 可以 到达 甲 站 ． 如果 两车 同时 从 甲 、 乙 两站 出发 ， 相向 而 行 ， 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14426", "content": "商场 出售 一批 服装 ， 每件 售价 60 元 ． 卖出 (5/8) 时 ， 商场 收回 全部 成本 后 还 盈利 200 元 ， 剩下 的 服装 全部 卖出 ， 又 盈利 1800 元 ． 这 批 服装 的 成本 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4033", "content": "一 个数 加上 8 ， 然后 乘 6 ， 再 减去 20 等于 58 ， 这个 数 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18136", "content": "某 车 从 甲地 到 乙地 ， 2 小时 行 了 全程 的 (3/4) ． 照 这样 的 速度 ， 行 完全 程 还要 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9691", "content": "某 工厂 投资 32 万元 新建 了 一 生产 车间 比 计划 少 投资 8 万元 ， 比 计划 少 投资 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2182", "content": "粮店 运 来 3 车 新鲜 大米 ， 每辆车 装 了 30 袋 ， 一共 运 来 1500 千克 ， 每 袋 大米 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15412", "content": "甲 桶 有 43 升 油 ， 乙 桶 有 32 升 油 ， 把 这些 油 每 5 升 装 一瓶 ， 一共 可以 装 多少 瓶 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2376", "content": "星光 饭店 上个月 的 营业额 是 42 万元 ， 如果 饭店 按 营业额 的 5% 缴纳 营业税 后 ， 上个月 的 纯收入 = 多少 万元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5243", "content": "贝 贝 去 超市 买 一支 圆珠笔 和 一本 软 面 抄 ， 她 发现 有 5 种 圆珠笔 ， 3 种 软 面 抄 ， 她 共有 多少 种 不同 的 买 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18050", "content": "公路 的 一旁 每隔 40 米 有 木 电杆 一根 （ 两端 都 有 ） ， 共 121 根 ， 现 改为 水泥 电杆 51 根 （ 包括 两端 ） ， 那么 两根 相邻 水泥 电杆 之间 的 距离 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10204", "content": "一 条 绳子 剪 去 (2/5) ， 还 剩 2 米 ， 这 条 绳子 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20707", "content": "48 * 2.5 的 积 减去 0.125 / 8 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12444", "content": "龙门 村 去年 人均收入 2800 元 ， 在 中央 建设 社会主义 新 农村 的 政策 支持 下 ， 今年 人均收入 4200 元 ． 龙门 村 人均收入 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1796", "content": "6 （ 1 ） 班 有 40 人 ， 一次 数学 测验 只有 两道 题 ， 结果 全班 有 10 人 全 对 ． 第一 题 有 25 人 做 对 ， 第 二 题 的 18 人 做 错 ， 那么 两道 题 都 做 错 的 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17126", "content": "有 60 道口 算题 ， 小 红 用 了 7.5 分钟 完成 ， 小 军用 了 8 分钟 完成 ， 小 红 平均 每分钟 做 的 比 小 军 快 多少 道 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11764", "content": "玩具厂 计划 生产 600 个 零件 ， 如果 每天 做 6 个 ， 要 几天 才能 完成 任务 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2296", "content": "边防战士 巡逻 共 行 26 千米 ， 前 2.5 小时 在 平 路上 行走 ， 平均 每 小时 行 5 千米 ， 后来 在 山上 行走 ， 平均 每 小时 行 3 千米 ． 在 山地 上 行走 了 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18688", "content": "429 + 1850 与 37 的 商 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16233", "content": "布袋 里 有 12 双 红 手套 和 5 双 白 手套 ， 一次 至少 摸 出 多少 只 才能 保证 能 配成 一双 相同 颜色 的 手套 ． （ 手套 有 左右 之 分 ）", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12144", "content": "某 房地产 公司 建 占地 9500 平方米 的 “ 安康 小区 ” ， 城市规划 要求 绿地 的 面积 至少 要 达到 小区 面积 的 30% ． 这个 小区 的 绿地面积 至少 要 达到 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12996", "content": "王 叔叔 骑 自行车 从 甲地 到 乙地 ， 如果 每 小时 行 12 千米 ， 5 小时 到达 ， 如果 想 提前 1 小时 到达 ， 每 小时 需要 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22236", "content": "食堂 一天 买 米 ， 上午 买 了 1500 千克 ， 是 下午 买 的 3 倍 ， 食堂 这 一天 共 买 大米 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20066", "content": "一 个 足球 65 元 ， 一个 篮球 35 元 ， 王老师 各 买 了 6 个 ， 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21485", "content": "工程队 已经 修 了 一条 路 的 (3/8) ， 还 剩下 1000 米 没有 修 ， 要 修 的 这 条 路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13326", "content": "1 千克 的 (4/5) 和 4 千克 的 多少 一样 大 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15089", "content": "合唱队 有 80 人 ， 舞蹈队 的 人数 比 合唱队 人数 少 (7/16) ， 舞蹈队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "702", "content": "少年宫 美术组 有 7 名 同学 ， 3 个 月 共创 作出 189 幅 画 ， 平均 每人 每月 创作 了 多少 幅 画 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "851", "content": "六年级 学生 报名 参加 数学 兴趣小组 ， 参加 的 同学 是 六年级 总 人数 的 (1/3) ， 后来 有 20 人 参加 ， 这时 参加 的 同学 与 未 参加 的 人数 的 比 是 3 ： 4 ． 六年级 一共 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10878", "content": "一 条 路 ， 已修 了 (2/5) ， 是 400 米 ， 还 剩 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5262", "content": "做 3 根 跳绳 要 买 6 米 塑料绳 ， 如果 要 做 18 根 跳绳 ， 需要 买 多少 米 塑料绳 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12658", "content": "玲玲 的 身高 是 1.42 米 ， 她 站 在 0.4 米 高 的 凳子 上 比 妈妈 高 0.15 米 ， 妈妈 的 身高 = 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14593", "content": "一 列 客车 和 一列 货车 同时 从 甲 、 乙地 相对 开出 ， 相遇 后 两车 继续 向前行驶 ， 当 客车 到达 乙地 ， 货车 到达 甲地 后 ， 两车 立即 返回 ， 已知 第 二 次 相遇 的 地点 距 甲地 120 千米 ， 客车 与 货车 的 速度 比 是 3 ： 2 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8029", "content": "一 件 衣服 原价 是 120 元 ， 现 按 0.9 出售 ， 买 这件 衣服 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1910", "content": "果园 里 有 桃树 328 棵 ， 比 梨树 多 50 棵 ， 苹果树 是 梨树 的 2 倍 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "868", "content": "小 明 到 商店 买 了 2 本 同样 的 练习本 ， 每 本 0.12 元 ， 又 买 了 一支 2.15 元 的 圆珠笔 ． 他 付给 营业员 5 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21934", "content": "比 (4/5) 米 长 (3/20) 米 的 = 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2342", "content": "5 （ 6 ） 班 共有 60 名 学生 ， 其中 女生 有 24 人 ， 男生 人数 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14871", "content": "小 华 早晨 上学 ， 从 家 到 学校 用 15 分钟 ， 平均 每分钟 走 60 米 ， 下午 放学 回家 ， 比 早晨 每分钟 少 走 10 米 ， 小 华 从 学校 到 家 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2127", "content": "一 个数 扩大 100 倍 是 1.38 ， 原来 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17791", "content": "一 堆 煤 原 计划 每天 烧 18 吨 ， 200 天 烧 完 ． 由于 改进 炉灶 ， 每天 烧 16 吨 ． 这 堆 煤 实际 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11702", "content": "一 件 工作 ， 如果 4 小时 可以 完成 它 的 (1/5) ， 那么 平均 每 小时 能 完成 这件 工作 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18953", "content": "小 明 看 一本 84 页 的 书 ， 前 4 天 平均 每天 看 11 页 ， 剩下 的 3 天 看 完 ， 这 一 星期 平均 每天 看 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14455", "content": "服装厂 生产 一批 服装 ， 每天 生产 210 件 ， 45 天 可以 完成 任务 ． 这 批 服装 一共 有 多少 件 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20348", "content": "一 堆 煤 已经 运走 47 吨 ， 还 剩下 18 吨 ， 运走 这 堆 煤 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14714", "content": "两列 火车 同时 从 两个 车站 相对 开出 ， 甲 车 每 小时 行 82.4 千米 ， 乙 车 每 小时 行 77.6 千米 ， 5.5 小时 后 相遇 ； 两站 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8381", "content": "公园 里 有 一个 圆形 的 水池 ， 李 大爷 每天 早晨 绕 着 水池 跑 15 圈 ， 如果 圆形 水池 的 直径 是 20 米 ， 李 大爷 每天 早晨 大约 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13137", "content": "有 一个 长方体 木箱 ， 长 7 分 米 ， 宽 5 分 米 ， 高 3 分 米 ， 怎么 放 ， 这个 木箱 的 占地面积 最小 ？ 最小 = 多少 平方分米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18073", "content": "一 本 故事书 ， 小 明 已 看 了 全书 的 (2/5) ， 还 剩下 全书 的 多少 没有 看 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "931", "content": "6 年 （ 1 ） 班 有 50 人 ， 今天 的 缺勤 率 为 2% ， 出勤 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8732", "content": "向阳 小学 评出 48 名 3 好生 ， 正好 是 全校学生 数 的 (2/25) ， 请问 全校学生 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3528", "content": "32 名 同学 在 操场 做 游戏 ， 每 4 人 分 一组 ， 可以 分成 多少 组 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19560", "content": "4 只 小 猴 共 摘 了 408 个 桃子 ， 平均 每 只 小 猴 摘 桃 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3700", "content": "师徒 两 人 共同 加工 一批 零件 ， 第一天 师傅 加工 了 总数 的 18% ， 徒弟 加工 了 总数 的 12% ， 一共 加工 了 300 个 ． 这 批 零件 一共 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17293", "content": "世界 上 最大 的 鸟 是 鸵鸟 ， 体重 可 达 90 千克 ， 最小 的 是 蜂鸟 ， 体重 只有 0.0016 千克 ． 鸵鸟 的 体重 是 蜂鸟 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21529", "content": "筑路 工人 要 在 1500 米 长 的 路段 上 修建 排水 井 ， 路 的 起点 和 终点 都 修 ． 每 相邻 两个 排水 井 相距 25 米 ， 这 段 路 需要 修建 多少 个 排水 井 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5025", "content": "王老师 带 了 900 元 钱 ， 买 一台 洗衣机 用 去 698 元 ， 买 一台 电风扇 用 去 185 元 ， 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15488", "content": "列式 计算 ： 4.5 * 1.84 ， 所得 的 积 再 乘 0.54 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18321", "content": "一 件 衣服 打 0.8 后 以 46.4 元 的 价钱 出售 ． 这件 衣服 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20078", "content": "筑路 队 修 一条 10 千米 的 公路 ． 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 全长 的 (1/4) ， 还有 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9474", "content": "5 一班 有 50 人 ， 有 一天 请假 2 人 ， 到校 上课 的 人数 占 全班 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22159", "content": "水果店 运进 苹果 480 千克 ， 运进 的 梨 比 苹果 少 (2/5) ， 运进 梨 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20595", "content": "商店 运 来 12 筐 苹果 ， 每 筐 24.5 千克 ． 运 来 的 梨 的 质量 比 苹果 的 2 倍 少 80 千克 ． 运 来 的 梨 有 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "909", "content": "某 实验 小学 科技 组 人数 是 美术组 的 (5/8) ， 又 是 体育组 的 (5/6) ． 美术组 有 40 人 ， 求 体育组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15024", "content": "一 些 钱 用 去 60% 后 剩下 280 元 ． 如果 用 去 (2/7) ， 应 剩下 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22602", "content": "叔叔 一次 稿酬 所得 为 3500 元 ， 按规定 减去 800 元 后 的 部分 按 20% 的 税率 交纳 个人所得税 ． 他 应 缴纳 多少 元 的 个人所得税 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21292", "content": "60 / 240 得 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13199", "content": "王大妈 用 50 元 钱 去 买 16.5 千克 大米 ， 每千克 大米 要 付 2.40 元 钱 ， 营业员 应 找 给 王大妈 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2800", "content": "某 超市 今天 购 （ ɡ ò u ） 进 喜之郎 果冻 860 千克 ， 上午 售出 256 千克 ， 下午 又 售 （ sh ò u ） 出 382 千克 ， 超市 还 剩 多少 千克 果冻 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2928", "content": "一 条 路 长 7500 米 ， 修路 工人 修 了 12 天 ， 还有 2700 米 没有 修 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22842", "content": "一 架 喷气式 飞机 3 小时 飞行 2880 千米 ， 一列 火车 每 小时 行 80 千米 ， 这 架飞机 的 速度 是 这 列 火车 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4272", "content": "幼儿园 买 回 5 袋 苹果 ， 每 袋 重 27 千克 ， 把 这些 苹果 平均 分给 9 个 班 ， 每个 班 分 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11989", "content": "平均 每 100 克 海水 中 含盐 5 克 ． 盐 占 海水 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22117", "content": "公园 运 来 160 盆花 ， 准备 摆在 4 个 花坛 里 ． 平均 每个 花坛 摆 多少 花盆 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6168", "content": "在 一个 长 25 厘米 、 宽 12 厘米 、 高 20 厘米 的 长方体 玻璃缸 中 放入 一个 棱 长 9 厘米 的 正方体 铁块 ， 然后 加满 水 ． 当 铁块 从 水中 取出 时 ， 玻璃缸 中 的 水 会 下降 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15226", "content": "科学研究 发现 水 结成 冰 后 ， 体积 比 原来 增加 约 11.1% ， 现在 某 公司 需要 一块 2.222 立方米 的 冰块 ， 大约 需要 多少 立方米 的 水 来 制冰 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6895", "content": "一 个 比 的 比值 是 1.5 ， 前项 和 后 项 的 和 是 60 ， 后 项 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20859", "content": "有 6 个人 ， 他们 互 寄 一张 贺卡 ， 一共 寄 了 多少 张 贺卡 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15840", "content": "由 1 、 2 、 3 、 4 4 个 数字 可 组成 多少 个 不同 的 3 位数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11684", "content": "五年级 有 女生 60 人 ， 男生 比 女生 少 10% ． 五年级 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22125", "content": "梅花鹿 高 1.44 米 ， 长颈鹿 的 身高 是 梅花鹿 身高 的 2.5 倍 还 多 0.72 米 ， 长颈鹿 的 身高 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7352", "content": "(25/100) + (8/10) 的 结果 用 小数 表示 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21658", "content": "万 德隆 超市 下午 卖出 白糖 24 千克 ， 比 上午 多 了 (1/5) ， 上午 卖出 白糖 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5169", "content": "一 块 木板 的 面积 是 (18/23) 平方米 ， 把 它 裁成 同样 大 的 6 块 ， 每块 的 面积 = 多少 平方米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22455", "content": "某 酒店 买来 12 包 毛巾 ， 共 付款 864 元 ， 每包 毛巾 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "157", "content": "某 开发商 计划 投资 350 万元 兴建 厂房 ， 实际 投资 了 301 万元 ， 实际 投资 占 计划 投资 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22765", "content": "牛郎星 运行 的 速度 是 26 千米 / 秒 ， 织女星 运行 的 速度 是 牛郎星 的 (7/13) ， 织女星 每秒 运行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3007", "content": "一 桶 油 的 质量 等于 它 本身 质量 的 75% 再 加上 (3/4) 千克 ， 这 桶 油 本身 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7274", "content": "文具厂 生产 一批 彩笔 ， 共 2800 枝 ， 每 7 枝 装 一袋 ， 每 2 袋装 一盒 ， 这 批 彩笔 一共 可以 装 多少 盒 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7557", "content": "甲 数 是 7.18 ， 比 乙 数 少 3.6 ， 甲 、 乙 两 数 的 和 = ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1811", "content": "一 项 工程 ， 甲乙 合作 8 天 完成 ． 如果 让 甲 先 做 6 天 ， 然后 乙 再 独 做 9 天 可以 完成 任务 ． 那么 乙 独 做 这项 工程 要 多少 天 ．", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12264", "content": "一 根 绳子 ， 剪 去 (1/4) 米 ， 剩下 的 部分 刚好 是 原来 全长 的 (3/4) ， 这根 绳子 长 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "855", "content": "修路 队 要 修 一条 40 千米 长 的 公路 ， 2 天 修 了 8 千米 ． 剩下 的 长度 是 已经 修 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20535", "content": "3.48 / 多少 = 0.348 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10616", "content": "学校 有 一批 作业本 ， 取出 它 的 (3/5) 按 2 ： 3 的 比例 分配 给 甲乙 两个 班 ， 已知 甲班 比 乙班 少 分 60 本 ， 这 批 作业本 一共 有 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3360", "content": "有 一桶 油 ， 第一次 倒 出 25% ， 第 二 次 倒 出 15 千克 ， 第 3 次 倒 出 的 是 前 两次 的 和 ， 此时 还 剩下 这 桶 油 的 12.5% ， 这 桶 没 原有 油 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5244", "content": "五年级 同学 去 游玩 ， 把 90 人 平均 分成 2 队 ， 每队 平均 分成 3 组 ， 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9988", "content": "光明 小学 为 山区 同学 捐书 ， 四年级 捐 240 本 ， 五年级 捐 的 是 四年级 的 2 倍 ， 六年级 比 五年级 多 捐 120 本 ， 六年级 捐 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14226", "content": "学校 去年 植树 120 棵 ， 今年 植树 的 棵 树 比 去年 的 (3/4) 多 5 棵 ， 今年 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20833", "content": "一 个数 增加 它 的 (1/7) 后 是 5.6 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "944", "content": "一 只 梅花鹿 高 1.46 米 ， 一只 长颈鹿 的 高度 是 梅花鹿 的 3 倍 ． 梅花鹿 比 长颈鹿 矮 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2156", "content": "已知 两 城市 相距 688 千米 ， a 、 b 两车 分别 从 两 城市 同时 相对 开出 ， a 车 每 小时 行 80 千米 ， b 车 每 小时 行 92 千米 ． 几小时 后 两车 能 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5630", "content": "20 米 减去 它 的 (1/4) 后 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1633", "content": "张卫东 计划 在 周末 完成 20 道 数学题 ， 已经 完成 16 道 ， 还 差 几分 之 几 就 可以 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21386", "content": "有 6 位 同学 在 春节 期间 ， 每人 都 给 其他同学 发 一条 短信 表示 问候 ， 那么 他们 一共 发 了 多少 条 短信 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "111", "content": "某班 共有 46 人 ， 参加 美术 小组 的 有 12 人 ， 参加 音乐 小组 的 有 23 人 ， 有 5 人 两个 小组 都 参加 了 ． 这个 班 既 没 参加 美术 小组 也 没 参加 音乐 小组 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10081", "content": "一 支 修路 队 计划 修路 5.7 千米 ， 已经 修 了 9 天 ， 还 剩 3 千米 ， 这 支 修路 队 平均 每天 修路 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2923", "content": "一 次 劳动 ， 第一次 割 半块 草地 加 2 公顷 ， 第 二 天 割 剩余 部分 的 25% ， 还 剩 6 公顷 未 割 ， 这块 草地 面积 共 多少 公顷 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9601", "content": "两列 火车 同时 从 相距 525 千米 的 两地 相对 开出 ， 3 小时 后 相遇 ． 一列 火车 每 小时 行驶 90 千米 ， 另 一列 火车 每 小时 行使 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3844", "content": "一 架飞机 每 小时 飞 1200 千米 ， 一列 火车 的 速度 正好 是 飞机 速度 的 (1/8) ， 而 一辆 汽车 的 速度 相当于 火车 速度 的 (1/3) ， 这辆 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "491", "content": "一 桶 啤酒 倒 出 (2/3) ， 刚好 倒 出 12 千克 ． 这 桶 啤酒 原来 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9678", "content": "商店 运 来 苹果 120 千克 ， 运 来 的 梨 比 苹果 的 (3/4) 少 10 千克 ． 运 来 梨 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18020", "content": "甜瓜 每千克 7.5 元 ， 妈妈 买 了 2.6 千克 ， 给 售货员 20 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2314", "content": "同学 们 准备 开 联欢会 ， 买来 一些 水果 ． 买来 苹果 68 个 ， 买来 梨 的 个数 是 苹果 的 3 倍 ， 联欢会 上 准备 了 多少 个 水果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7333", "content": "同学 们 进行 军训 共 行 15 千米 ． 前 1.5 小时 在 平地上 行走 ， 平均 每 小时 行 4 千米 ； 后来 在 山地 行走 ， 平均 每 小时 行 2.5 千米 ， 在 山地 行走 了 几小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18251", "content": "从 福州 到 上海 的 铁路 全长 1200 千米 ， 而 杭州 是 中间 的 一个 站 ． 已知 上海 到 杭州 的 路程 是 杭州 到 福州 路程 的 (1/4) ， 求 福州 到 杭州 的 路程 = 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11426", "content": "林 老师 买 了 12 种 不同 颜色 的 橡皮泥 各 3 盒 作为 奖励 ， 至少 要 有 多少 个 同学 获奖 （ 每人 奖励 一盒 ） ， 才能 保证 有 两个 同学 得到 的 橡皮泥 的 颜色 是 相同 的 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5274", "content": "两个 生物 小组 15 天 共 制作 蝴蝶 标本 690 个 ． 第一组 每天 制作 20 个 ， 第 二 组 每天 制作 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12945", "content": "服装厂 计划 做 863 套 服装 ， 已经 做 了 6.5 天 ， 平均 每天 做 76 套 ． 剩下 的 平均 每天 做 82 套 ， 还要 几天 做 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7628", "content": "学校 召开 运动会 ， 参加 田径比赛 的 有 60 人 ， 比 参见 球类 比赛 的 人数 多 20% ． 参加 球类 比赛 的 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13196", "content": "五年级 学生 用 一条 长 8 米 的 绳子 捆扎 收 聚 的 废品 ， 用 去 了 它 的 (5/8) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2980", "content": "校园 里 有 36 盆 杜鹃花 ， 菊花 的 盆 数 比 杜鹃花 的 3 倍 少 12 盆 ， 校园 里 一共 有 杜鹃花 和 菊花 多少 盆 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4077", "content": "在 一个 比例 中 ， 如果 两个 外 项 的 积 是 (1/2) ， 其中 一个 内 项 是 (2/3) ， 则 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16175", "content": "6 一班 54 位 同学 中 ， 调查 中 发现 50% 的 同学会 游泳 ， (1/3) 的 同学会 体操 ， 游泳 和 体操 都 不会 的 有 15 人 ， 既 会 游泳 又 会 体操 的 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9034", "content": "50 个数 的 平均数 是 38 ， 如果 把 其中 两个 数 45 和 55 去掉 ， 那么 剩下 的 48 个数 的 平均数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10095", "content": "冬冬 家 在 15 平方米 的 土地 上 共 育苗 135 棵 ， 照 这样 计算 ， 要 育苗 990 棵 ， 需要 多 大面积 的 土地 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16850", "content": "多少 / 7 = 18 … 3 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "822", "content": "一 件 衣服 进价 50 元 ， 按 标价 的 0.6 售出 仍 能 赚 34 元 ， 则 标价 为 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3550", "content": "爸爸 给 小雨 买 了 一辆 自行车 ， 原价 180 元 ， 现在 商店 打 0.85 出售 ． 买 这辆 车用 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13770", "content": "（ 200 小 • 武昌区 ） 为 支援灾区 的 学生 学习 ， 育 红 小学 开展 了 捐书 活动 ． 四年级 捐 了 120 本 ， 五年级 比 四年级 多 捐 60 本 ， 五年级 捐书 的 本 数 是 四年级 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14282", "content": "张 奶奶 在 菜场 买 了 6.5 千克 豆角 ， 付出 20 元 ， 找回 1.8 元 ， 每千克 豆角 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23068", "content": "在 校门口 一条 120 米 长 的 小路 一旁 每隔 3 米 插 一面 彩旗 （ 两端 要 插 ） ． 一共 要 插 多少 面 彩旗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4530", "content": "东东 摘 了 4 蓝 苹果 ， 共 96 千克 ； 西 西 共 摘 了 12 千克 ． 东东 摘 的 苹果 的 重量 是 西 西 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1602", "content": "一 根 木棒 把 它 锯 成 等 长 的 段 要 锯 3 次 ， 每 锯 一次 用 5 分钟 ， 每 段 是 全长 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22991", "content": "某 城市 去年 降雨量 是 1800 毫米 ， 比 前年 减少 (2/11) ． 这个 城市 前年 降雨量 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18861", "content": "学校 有 14 棵 杨树 ， 松树 的 棵 数 是 杨树 的 2 倍 ， 柳树 比 松树 少 4 棵 ， 有 多少 棵 柳树 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20487", "content": "一 辆 卡车 给 商店 运 来 10 箱 苹果汁 和 12 箱 橘子汁 ， 每箱 24 瓶 ， 一共 运 来 多少 瓶 饮料 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7113", "content": "教室 里 有 55 张 课桌 ， 兰兰 擦 了 全部 课桌 的 了 (3/5) ， 明明 擦 了 全部 课桌 的 (2/5) ． 明明 比 兰兰 少 擦 几张 课桌 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "522", "content": "5.6 与 3.8 的 和 乘 它们 的 差 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17782", "content": "在 2011 年 “ 地球 停电 一 小时 ” 活动 中 某 地区 烛光 晚餐 中 ， 设 座位 有 若干 排 ， 若 每排 坐 30 人 ， 则 有 8 人 无 座位 ； 每排 坐 31 人 ， 则 空 26 个 座位 ， 则 共有 多少 排座位 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4555", "content": "甲 城 和 乙 城 相距 875 千米 ． 一辆 汽车 以 每 小时 45 千米 的 速度 从 甲 城 开出 ， 行驶 了 11 小时 后 ， 距 乙 城 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22416", "content": "某 中学 高 、 初中 学生 积极 参加 “ 我 为 小 平 故里 植 棵 树 ” 活动 ． 高中学生 植树 1200 棵 ， 是 初中 学生 植树 棵 数 的 3 倍 还 多 60 棵 ． 某 中学 高 、 初中 学生 共 植树 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2070", "content": "有 60 个 小朋友 排成 一队 ， 从前 开始 数 ， 小 华 排 在 第 35 个 ． 从 后 开始 数 ， 他 排 在 第 多少 个 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16202", "content": "两个 小组 的 同学 浇花 ， 第一 小组 浇 了 总 花 数 的 (1/2) ， 第 二 小组 浇 了 总 花 数 的 (1/3) ， 两个 组 一共 浇 了 总 花 数 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6091", "content": "两艘 客船 同时 从 甲 、 乙 两个 港口 相对 开出 ， 甲 客船 每 时 行 36 千米 ， 乙 客船 每 时 行 40 千米 ， 两 客船 经过 10 时 相遇 ， 甲 、 乙 两 港口 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15444", "content": "从 a 城 到 b 城 可以 从 高速公路 上 走 ， 也 可以 坐火车 去 ． 一辆 小汽车 每 时 行 120 千米 走 要 3.5 小时 ． 如果 改乘 火车 ， 每 时 是 小汽车 的 (5/6) ， 多少 时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5159", "content": "张老师 去 商店 给 学校 买 粉笔 ， 白色 粉笔 每包 0.8 元 ， 彩色 粉笔 每包 1.2 元 ． 要 用 买 20 包 彩色 粉笔 的 钱 去 买 白色 粉笔 ， 能 买 白色 粉笔 多少 包 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4676", "content": "把 一个 底面 直径 4 分 米 的 圆柱体 ， 截去 一个 高 2 分 米 的 小 圆柱体 ， 原来 的 圆柱体 表面积 减少 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22229", "content": "5.5 与 0.406 相乘 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6636", "content": "一 个 圆柱 底面 半径 为 2 分 米 ， 高 5 分 米 ， 把 它 沿着 直径 竖直 平 分为 两 部分 ， 表面积 增加 了 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "11804", "content": "小 明 骑 自行车 从 家 出发 到 学校 ， 已经 行 了 全程 的 (5/8) ， 正好 是 (5/12) 千米 ． 小 明 离 学校 还有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2977", "content": "王 亮 去 给 李 丽 送 连环画 册 ， 为 节省时间 ， 两 人 同时 从 家 出发 ． 王 亮 每分钟 走 53 米 ， 李 红 平均 每分钟 走 67 米 ． 已知 王 亮 与 李 丽 家 相距 1200 米 ， 几分钟 后 两 人 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15245", "content": "小 华 有 一本 700 页 的 故事书 ， 看 了 16 天 ， 还 剩下 60 页 ， 小 华 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9473", "content": "一 个 平形四边 形 的 底 是 12 分 米 ， 高 是 8 分 米 ， 这个 平行四边形 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20374", "content": "茗 居 小学 四年级 师生 215 人 去 春游 ， 其中 35 人 乘坐 中巴车 ， 其余 的 人 乘坐 4 辆 大客车 ， 平均 每辆 大客车 坐 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4738", "content": "一 本 故事书 共有 460 页 ， 小 红 前 6 天 看 了 120 页 ， 照 这样 的 速度 ， 剩下 的 还要 多少 天 才能 读完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19544", "content": "果园 里 有 一批 苹果 ， 上午 运走 全部 的 (1/3) ， 下午 运走 120 千克 ， 这时 已经 运走 的 占 全部 苹果 重量 的 (3/8) ， 这 批 苹果 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "185", "content": "按 有关 规定 ， 进口 某种 货物 需 交纳 货物 价值 12% 的 税 ． 某 公司 进口 了 一批 这种 货物 ， 交税 6 万元 ， 这 批 货物 价值 多少 万元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3074", "content": "建筑工地 运 水泥 ， 上午 运 来 65 吨 ， 下午 运 的 比 上午 的 2 倍 还 多 15 吨 ， 这 一天 共运 来 多少 吨 水泥 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15441", "content": "甲乙 两地 相距 450 米 ， 一辆 汽车 从 甲地 出发 ， 已 行 的 路程 比 全程 的 (3/5) 还 多 25 千米 ， 这辆 汽车 离 乙地 还有 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10852", "content": "买 12 套 这样 的 舞蹈 服 ， 一共 需要 多少 钱 ？ （ 上衣 36 元 ， 下 衣 24 元 ． ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18163", "content": "一 张 长方形 桌面 的 面积 是 1 平方米 ． 一张 正方形 桌面 边长 是 (9/10) 米 ． 长方形 桌面 的 面积 比 正方形 的 多 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11862", "content": "妈妈 买来 一袋 大米 ． 每天 吃 2 千克 ， 8 天 吃 完 ． 这 袋 大米 一共 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2254", "content": "一 条 公路 全长 1000 千米 ， 一辆 汽车 8 小时 行 了 全程 的 40% ， 照 这样 的 速度 ， 行 完全 程 共 要 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4537", "content": "45 的 40% 比 一个 数 的 (1/3) 还 多 2 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8234", "content": "某 商品 现在 售价 4 元 ， 比 原价 降低 了 1 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22848", "content": "工人 叔叔 给 学校 体育馆 铺地板 ， 上午 和 下午 各 铺 了 (1/5) ， 还 剩下 几分 之 几 没 铺 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13404", "content": "育 红 小学 有 男生 760 人 ， 女生 640 人 ， 朝阳 小学 女生 人数 是 男生 人数 的 120% ， 如果 把 两个 学校 学生 合并 在 一起 ， 那么 男 、 女生 人数 相等 ． 朝阳 小学 有 男生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11237", "content": "工程队 修 一条 路 ， 已修 了 180 米 ， 剩下 的 比 已修 的 12 倍 少 16 米 ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10979", "content": "一 种 型号 的 汽车 原来 每辆 售价 5.4 万元 ， 后来 经历 了 两次 调价 ， 第一次 价格 上调 了 10% ， 第 二 次 价格 下调 了 20% ． 这种 型号 的 汽车 现在 每辆 售价 多少 万元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8272", "content": "王老师 用 150 元 为 小强 买 一些 文具 ， 他 用 96 元 钱 买 了 一个 书包 ， 剩下 的 钱 最 多 还 能 买 几本 日记本 ？ （ 钢笔 7 元 、 日记本 6 元 、 文具盒 15 元 、 书包 46 元 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17432", "content": "学校 新添 了 3 把 椅子 和 5 张 办公桌 ， 共 花 了 1035 元 ， 已知 每 把 椅子 45 元 ， 那么 每张 桌子 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5272", "content": "一 根 铁丝 长 36 米 ， 第一次 用 去 (2/5) 米 ， 请问 再 用 去 多少 米 正好 剩下 这根 铁丝 的 (1/3) ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18767", "content": "人民 小学 向 山区 小学 捐赠 了 200 本 图书 和 30 个 文具盒 ， 一共 花 了 1200 元 ， 文具盒 每个 12 元 ， 平均 每 本 图书 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7049", "content": "车站 有 一批 货物 ， 第一天 运走 全部 货物 的 (1/3) 少 20 吨 ， 第 二 天 运走 全部 货物 的 (1/4) 少 10 吨 ， 这时 车站 还 存 货物 110 吨 ． 这 批 货物 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4332", "content": "我国 有 22 种 桦树 ， 正好 占 全世界 桦树 种类 的 (11/20) ． 全世界 有 多少 种 桦树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1110", "content": "(1/3) - (1/4) 的 (1/2) 的 差 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6205", "content": "甲 数 是 56 ， 乙 数 比 甲 数 的 (6/7) 少 3 ． 乙 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2576", "content": "李老师 看 一本 小说 ． 如果 每天 看 34 页 ， 20 天 后 还 剩 125 页 ． 这本 小说 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "825", "content": "果品 公司 运 来 205 筐 水果 ， 有 120 筐 是 香蕉 ， 其余 的 是 芒果 ， 香蕉 比 芒果 多 多少 筐 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "910", "content": "四年级 有 5 个 班 ， 每个 班 平均 种 了 25 棵 树苗 ， 购买 树苗 花 了 1250 元 ， 每棵 树苗 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11523", "content": "张师傅 要 加工 一批 零件 ， 已经 加工 4.5 小时 ， 平均 每 小时 加工 32 个 零件 ， 还有 36 个 零件 未加工 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9521", "content": "李 明 录入 一份 书稿 ， 原 计划 每天 录入 2.4 万 字 ， 10 天 完成 ， 实际 每天 录入 3 万 字 ． 这样 比 原 计划 少 用 了 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6927", "content": "一 条 路 长 3000 米 ， 在 它 的 一边 栽树 （ 两头 都 栽 ） ， 每隔 50 米 栽 一棵 ， 共 栽 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "218", "content": "工程队 修 一段 公路 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 150 米 ， 第 3 天 修 了 全长 的 (3/8) ， 正好 修 完 ． 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2784", "content": "3 个 同学 踢毽子 ， 小强 踢 了 100 下 ， 是 李 平 的 (5/7) ， 张 丽 踢 的 是 李 平 的 (2/5) ， 张 丽 踢 了 多少 下 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "171", "content": "有 一条 水渠 需要 开挖 ， 第一天 挖 了 32 千米 ， 第 二 天 比 第一天 多 挖 17 千米 ， 还 剩 25 千米 没 挖 ， 这 条 水渠 全长 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1965", "content": "上海 到 武汉 的 航道 长 1075 千米 ． 两艘 轮船 同时 从 上海 和 武汉 相对 开出 ， 从 上海 开出 的 轮船 每 小时 行 17 千米 ， 从 武汉 开出 的 轮船 每 小时 行 26 千米 ， 经过 几小时 两 船 在 途中 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20222", "content": "学校 举行 “ 迎 奥运 ” 书画 比赛 ， 参赛 的 女生 比 男生 多 15 人 ， 比赛结果 是 女生 有 (3/4) 获奖 ， 男生 全部 获奖 ， 男女生 获奖 人数 相同 ， 参赛 的 男生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18531", "content": "一 本书 有 127 页 ， 小叶 已经 看 了 64 页 ， 剩下 7 天 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16724", "content": "小 萍 身高 140 厘米 ， 小 萍 比 小 青 矮 (1/8) ． 小 青 身高 多少 厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17754", "content": "这个 电影院 共有 825 个 座位 ， 每张 电影票 的 价格 是 30 元 ． 这 一场 电影 的 收 人 大约 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18214", "content": "李师傅 每天 加工 零件 960 个 ， 比 王师傅 少 加工 (1/5) ， 王师傅 每天 加工 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19547", "content": "用 铁丝 把 2 根 横截面 直径 都 是 20 厘米 的 圆木 捆 在 一起 ， 如果 接头处 铁丝 长 5 厘米 ， 那么 捆 一周 至少 需要 多少 厘米 的 铁丝 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "5806", "content": "王师傅 加工 一批 零件 计划 15 天 完成 ， 由于 改进 技术 ， 工效 提高 了 25% ， 王师傅 实际 加工 了 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8933", "content": "一 种 树苗 的 成活率 是 96% ， 要 种 活 384 棵 树 ， 至少 要 种 多少 棵 树苗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11857", "content": "一 根 铁丝 ， 第一次 用 去 它 的 (1/5) ， 第 二 次 用 去 它 的 (1/2) ， 还 剩下 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22902", "content": "修路 队 修 一条 6 千米 的 公路 ， 第一周 修 了 全长 的 (3/7) ， 第 二 周 修 了 全长 的 (4/9) ， 还 剩下 全长 的 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21333", "content": "妈妈 原来 的 体重 是 58 千克 ， 经过 一个月 的 锻炼 ， 减轻 了 3 千克 ． 妈妈 现在 的 体重 = 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7444", "content": "一 家 大型 的 超级市场 ， 一月份 营业额 是 5000 万元 ， 如果 按 营业额 的 5% 缴纳 营业税 后 ， 还 剩 多少 万元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11584", "content": "育才 小学 3 、 四年级 各 有 5 个 班 ． 三年级 平均 每班 48 人 ， 四年级 平均 每班 有 45 人 ． 三年级 和 四年级 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11634", "content": "a 、 b 两地 相距 600 千米 ， 甲乙 两车 同时 从 两地 相对 出发 ， 5 小时 相遇 ． 已知 甲 车 速度 是 乙 车 的 (3/5) ， 求 乙 车 的 速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5456", "content": "一 箱 苹果 重 24 千克 ， 吃 了 (3/4) ， 吃 了 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16555", "content": "甲 乙丙 3 人 合 修 一段路 ， 完工 时 ， 甲 完成 了 全 工程 的 30% ， 乙 和 丙 工作量 的 比 是 3 ： 4 ． 已知 丙 修 了 48 米 ． 这 段 路 长 一共 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10031", "content": "一 辆 大客车 可以 乘坐 48 人 ， 一列 火车 可以 乘坐 的 人数 是 一辆 大客车 的 12 倍 ． 一列 火车 比 一辆 大客车 能 多 乘坐 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13901", "content": "有 一批 木料 ， 可以 做 同样 的 课桌 20 张 或 同样 的 椅子 30 把 ， 现在 要 做 同样 成套 的 课桌椅 ， 可以 做 多少 套 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9321", "content": "人民 路 两旁 从头到尾 各 安装 了 51 盏灯 ， 每 相邻 两盏 间隔 10 米 ， 这 条 路 全长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11403", "content": "小 明 买 一本 《 大 迷宫 》 用 8.5 元 ， 一本 词典 的 价格 是 它 的 3 倍 ， 买 一本 《 大 迷宫 》 和 一本 词典 ， 一共 要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19387", "content": "五年级 师生 向 希望 小学 捐书 150 本 ， 六年级 比 五年级 多 捐 (2/15) ， 是 把 多少 看作 单位 “ 1 ” ， 六年级 捐 的 书 相当于 五年级 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17788", "content": "水果店 一天 卖出 苹果 40 箱 ， 卖出 的 桔子 是 苹果 箱 数 的 3 倍 ， 卖出 的 橙子 比 苹果 和 桔子 的 总数 少 25 箱 ， 卖出 橙子 多少 箱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4632", "content": "泰州 到 姜堰 的 公路 长 18 千米 ， 从 姜堰 到 泰州 骑 摩托车 大约 需 20 分钟 ， 乘 公共汽车 大约 需要 30 分钟 ． 星期 6 爸爸 和 小 华 准备 从 姜堰 到 泰州 去 玩 ， 爸爸 从 泰州 骑 摩托车 ， 小 华 乘 公共汽车 ， 他们 同时 出发 ， 当 爸爸 到达 泰州 后 ， 小 明 离 泰州 还有 多 远 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2782", "content": "一 个 长方体 的 宽 是 长 的 (2/3) ， 长 是 高 的 (5/6) ， 它 的 宽 是 10 厘米 ， 它 的 高 = 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19298", "content": "小 红 买 笔记本 用 了 3.7 元 ， 还 剩 6.3 元 ， 小 红 原来 有 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14222", "content": "中百 超市 某 分店 昨天 的 营业额 是 3.8 万元 ， 今天 的 营业额 是 4.75 万元 ． 今天 的 营业额 比 昨天 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1135", "content": "小 红 从 家 到 公园 ， 走 了 全程 的 80% 时 正好 到达 少年宫 ， 他 从 公园 沿 原 路 返回 ， 行 了 全程 的 (1/4) 时 ， 就 过 少年宫 (3/5) 千米 ， 他家 到 公园 的 路程 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20920", "content": "小 兰 和 小 芳 同时 从 两地 相向 而 行 ， 小 兰 步行 每分钟 行 70.6 米 ， 小 芳 骑 自行车 每分钟 行 350.2 米 ， 8 分钟 后 两 人 相遇 ， 他们 一共 行 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16168", "content": "六年级 图书 角 有 图书 270 本 ， 借出 (4/9) ， 借出 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21627", "content": "六年级 人数 是 五年级 的 (4/5) ， 五年级 人数 是 四年级 的 (10/9) ， 四年级 有 360 人 ， 六年级 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21341", "content": "王老师 要 批改 48 篇 作文 ， 批改 了 4 小时 后 ， 还 剩 12 篇 ， 平均 每 小时 批改 几篇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "806", "content": "超市 运 来 一批 水果 ， 第一天 卖出 总数 的 (1/12) ， 第 二 天 卖出 总数 的 (5/12) ， 还 剩 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1189", "content": "一 个 加数 是 354 ， 另 一个 加数 是 629 ， 和 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22645", "content": "书店 里 有 2 本 不同 故事书 和 3 本 不同 的 科技 书 ． 小 明 要 买 其中 的 一 本书 ， 一共 有 多少 种 不同 的 买 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11449", "content": "光明 小学 举行 迎 6 一 书画 比赛 ， 参加 比赛 的 女生 比 男生 多 15 人 ． 比赛结果 是 ： 男生 全部 获奖 ， 女生 有 75% 的 人 获奖 ， 男 、 女生 获奖 人数 相等 ． 参加 比赛 的 男生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14266", "content": "某班 参加 体育 活动 的 学生 有 25 人 ， 参加 音乐 活动 的 有 26 人 ， 参加 美术 活动 的 有 24 人 ， 同时 参加 体 、 音 活动 的 有 16 人 ， 同时 参加 音 、 美 活动 的 有 15 人 同时 参加 体 、 美 活动 的 有 14 人 ， 3 个 组 同时 都 参加 的 有 5 人 ． 这个 班 共有 多少 名 学生 参加 活动 ？", "knowledge": ["+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "7682", "content": "一 根 4 米 长 的 绳子 ， 剪成 同样 长 的 8 段 ， 每 段长 多少 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17454", "content": "一 种 电子表 ， 每 只 售价 21 元 ， 比 原来 降低 了 30% ， 原价 每 只 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14846", "content": "公园 里 有 120 棵 松树 ， 杨树 的 棵 数 比 松树 棵 数 的 2.5 倍 还 多 10 棵 ， 公园 里 有 多少 棵 杨树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10987", "content": "某 超市 运 来 204 筐 苹果 ， 每 筐 重 30 千克 ． 现在 卖出 1780 千克 ， 还 剩下 多少 千克 苹果 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12683", "content": "果园 里 有 桃树 1400 棵 ， 是 梨树 的 (7/8) ． 桃树 和 梨树 共有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9640", "content": "三年级 4 个 班 同学 ， 一起 外出 参加 “ 我 爱 科学 ” 活动 ， 每个 班 平均 分成 3 组 ， 每组 16 人 ， 三年级 一共 有 多少 人 参加 这次 活动 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20876", "content": "小 明 喝 了 一瓶 果汁 的 (2/5) ， 正好 喝 了 (1/2) 升 ． 这 瓶 果汁 有 多少 升 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12271", "content": "班级 开 迎新晚会 ， 共有 30 位 同学 ， 平均 每人 可以 分 得 7 个 桔子 ． 后来 新 来 了 几位 客人 ， 按 现在 的 人数 重新分配 ， 平均 每人 只能 分 得 5 个 桔子 ． 后来 新 来 了 多少 位 客人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8253", "content": "丁丁 计划 18 天 看 完 一本 《 格林童话 》 ， 而 卡卡 比 丁丁 要 多用 3 天 看 完 ， 已知 丁丁 每天 比 卡卡 多 看 4 页 ． 那么 ， 这本 《 格林童话 》 共有 多少 页 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15602", "content": "王大爷 家 今年 收获 了 1157 千克 桃子 ， 如果 每 13 千克 装 一箱 ， 一共 要 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "492", "content": "一 桶 油 倒 出 85% ， 桶 内 还 剩下 24 千克 油 ． 桶 内 原有 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22939", "content": "一 个 工程队 要 修 一条 长 22400 米 的 公路 ， 计划 每天 修 320 米 ， 实际 每天 修 400 米 ， 实际 比 计划 提前 几天 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1723", "content": "一 商品 的 售价 为 546 元 ， 其 盈利率 为 30% ， 求 此 服装 的 成本价 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8131", "content": "水果店 运 来 750 千克 苹果 和 一些 橘子 ， 共 1260 千克 ， 运 来 橘子 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14313", "content": "校办 厂 计划 生产 2000 只 小学生 书包 ， 已经 生产 了 1080 只 ， 剩下 的 如果 要 在 4 天 内 完成 ， 每天 应 生产 多少 只 书包 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20077", "content": "一 个 果园 去 年产 橘子 56 吨 ， 今年 比 去年 多 生产 (1/7) ， 今年 生产 橘子 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21839", "content": "淘气 家 共有 5 口 人 ， 其中 女性 占 40% ， 女性 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8560", "content": "公鸡 有 48 只 ， 比 母鸡 多 (1/3) ， 母鸡 有 多少 只 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19045", "content": "伙房 10 天 烧 了 13 千克 煤 ， 照 这样 计算 ， 烧 100 天 ， 需要 多少 千克 煤 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1026", "content": "有 40 名 运动员 ， 其中 有 25 人 会 摔跤 ， 有 20 人 会 击剑 ， 有 10 人 击剑 、 摔跤 都 不会 ， 既 会 摔跤 又 会 击剑 的 运动员 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17463", "content": "有 300 个 桃子 ， 大 猴子 拿走 (1/3) ， 小猴子 拿走 余下 的 (1/4) ． 小猴子 拿走 了 多少 个 桃 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20288", "content": "(9/2) - (7/2) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17371", "content": "商场 促销 ， 一个 原价 是 240 元 的 洋娃娃 现在 打 0.8 出售 ， 买 一个 洋娃娃 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12510", "content": "一 个 长方体 的 长 是 5 厘米 ， 宽 和 高 都 是 4 厘米 ， 体积 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22728", "content": "两个 年级 的 同学 去 买 书 ， 三年级 有 48 人 ， 每人 买 2 本 ， 四年级 每人 买 3 本 ， 四年级 买 的 总 本 数 和 三年级 一样 多 ． 四年级 一共 有 多少 人 买 书 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22727", "content": "甲 数 是 24 ， 甲 、 乙 两 数 的 最少 公倍数 是 168 ， 最大公约数 是 4 ， 求 乙 数 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12224", "content": "计算 ： 113 * 5 - 37 * 15 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22773", "content": "修 一段 100 米 的 公路 ， 第一天 修 了 全长 的 30% ， 第 二 天 修 了 全长 的 27.5% ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3078", "content": "某 商场 上半年 销售额 达 1.2 亿元 ， 下半年 销售额 达 1.36 亿元 ， 已 超额 0.14 亿元 完成 了 全年 的 计划 销售额 ． 这个 商场 全年 的 计划 销售额 = 多少 亿元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9711", "content": "一 瓶 药片 共 120 片 ， 标注 为 “ 每日 3 次 ， 每次 2 片 ” ． 这 瓶 药 可以 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14986", "content": "和平 超市 “ 5 一 ” 促销 ， 所有 的 商品 0.9 销售 ， 小 红 买 一本 笔记本 比 原来 便宜 了 1.2 元 ， 笔记本 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11123", "content": "一 辆 汽车 可 乘坐 45 人 ， 一列 火车 可 乘坐 的 人数 是 汽车 的 28 倍 ， 一列 火车 比 一辆 汽车 多 坐 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10877", "content": "超市 运进 橙子 的 箱 数 比 苹果 的 4 倍 多 10 箱 ， 运进 苹果 24 箱 ， 运进 橙子 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17997", "content": "甲 数 的 4 倍 比 乙 数 的 3 倍 少 1 ， 乙 数 是 0.5 ， 甲 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14651", "content": "合唱队 有 (1/3) 是 男生 ， 女生 占 合唱队 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17061", "content": "学生 参加 搬 砖 劳动 ， 每人 搬 36 块 ， 需要 5 人才 搬 完 ， 照 这样 计算 ， 若果 9 人 去 搬 ， 每人 搬 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9211", "content": "一 批 加工 服装 的 任务 按 4 ： 5 分配 给 甲 、 乙 两个 车间 ， 实际 甲 车间 生产 了 450 套 ， 超过 分配任务 的 (1/4) ． 这 批 服装 共有 多少 套 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17380", "content": "一 辆 普通 列车 的 速度 是 96 千米 / 时 ， 它 15 小时 行驶 的 路程 特快 列车 只用 了 9 小时 ， 特快 列车 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14214", "content": "两个 因数 的 积 是 20.52 ， 其中 一个 因数 是 5.4 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14913", "content": "小 明 看 一 本书 ， 已经 看 了 60% ， 还 剩下 480 页 没有 看 ． 这 本书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7158", "content": "一 条 绳子 ， 第一次 剪 去 全长 的 25% ， 第 二 次 剪 去 全长 的 35% ， 两次 共 剪 去 6 米 ， 这 条 绳子 共 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4786", "content": "海啸 过后 的 第 16 天 ， 已 不是 中国 首富 的 丁磊 在 广州 宣布 他 个人 向 中国 红 十 字 会 捐款 120 万美元 ， 帮助 受灾地区 重建家园 ． 他 的 捐款 折合 人民币 多少 万元 （ 1 美元 相当于 8.25 元 人民币 ） ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22692", "content": "已知 两个 因数 的 积 1 ， 其中 一个 因数 是 (7/2) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8402", "content": "6 （ 1 ） 班 参加 过 计算机 培训 的 人数 占 全班 人数 的 (4/5) ， 未 参加 过 计算机 培训 的 人数 是 参加 过 计算机 培训 的 人数 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14736", "content": "兄弟 二 人 从 200 米 长 的 环形 跑道 同一 起点 同时 同 向 跑步 ， 已知 弟弟 每分钟 跑 120 米 ， 哥哥 每分钟 跑 140 米 ， 几分钟 后 哥哥 追 上 弟弟 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19188", "content": "164 与 49 的 差 除以 23 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10475", "content": "(16/5) 比 一个 数 的 25% 少 (2/5) ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21701", "content": "夕阳红 俱乐部 共有 女 会员 65 人 ， 男 会员 比 女 会员 多 20% ， 男 会员 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18605", "content": "一 辆 公交车 从 翠 峦 开往 伊春 ， 车上 原来 有 67 人 ， 到 乌马 河 有 25 人 下车 ， 又 上来 28 人 ， 现在 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19480", "content": "青青 看 一本 280 页 得 故事书 ， 第一天 看 了 35 页 ， 第 二 天 看 的 与 第一天 同样 多 ． 还有 多少 页 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6543", "content": "小 红 看 一本 故事书 ， 已经 看 了 31 页 ， 还有 29 页 ， 没 看 的 页数 占 全书 页数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21976", "content": "六年级 的 学生 参加 了 平安保险 ， 他们 向 平安保险 公司 共 交纳 22500 元 保险费 ， 如果 每人 保险金额 都 是 15000 元 ， 保险费率 是 0.1% ， 求 这个 六年级 共有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16471", "content": "李 大爷 今年 养 兔 25 只 ， 比 去年 养 的 只 数 的 3 倍 少 8 只 ． 去年 养 兔 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22694", "content": "用 20 克 盐 配制 成 含盐 率 5% 的 盐水 ， 应 加水 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2274", "content": "一 段 路 长 180 米 ， 已经 修 了 (1/9) 米 ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12280", "content": "由于 原材料 涨价 ， 某种 冰箱 提价 了 5% ， 每 台 冰箱 的 售价 比 原来 贵 了 162.5 元 ． 原来 每 台 冰箱 的 售价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12853", "content": "祝 博 和 李 凯 一共 有 120 张 邮票 ， 已知 祝 博 的 张 数 是 李 凯 的 (5/7) ， 那么 祝 博 有 多少 张 邮票 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16762", "content": "一 个 长方形 的 镜子 的 面积 为 120 平方分米 ， 它 的 长 为 15 分 米 ， 宽 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7492", "content": "小 莉 把 10000 元 钱 存入 银行 ， 定期 一年 ， 已知 年利率 是 2.98% ， 利息税 为 5% ， 到 时 连 利息 带 本金 一共 可 取出 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "12832", "content": "用 一批 纸 装订 练习本 ． 若 每 本 装订 60 页 ， 则 可以 装订 30 本 ． 如果 要 多 装订 20 本 ， 那么 每 本 应该 装订 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5706", "content": "5 年 一班 有 学生 40 人 ， 其中 男生 22 人 ， 女生 占 全班 人数 的 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5877", "content": "6 年 一班 有 学生 50 人 ， 其中 男生 占 52% ， 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1491", "content": "一 个 因数 是 113 ， 另 一个 因数 是 2 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19874", "content": "6 （ 1 ） 班 48 位 同学 中 ， 有 (2/3) 的 人 订 了 《 少年报 》 ， 有 (1/2) 的 人 订 了 《 小学生 报 》 ． 两种 刊物 都 订 的 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10441", "content": "一 个 小型化 工厂 每天 生产 洗衣粉 100 kg ， 每 袋装 (1/2) kg ， 每天 生产 多少 袋 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4725", "content": "王老师 看 一 本书 ， 如果 每天 看 28 页 ， 15 天 可以 看 完 ． 第一天 看 了 21 页 ， 按照 第一天 的 进度 ， 几天 可以 看 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18501", "content": "某 农户 在 农田 里 种 了 两块 地 的 黄豆 ， 一块 地 收 了 4500 千克 黄豆 ， 另 一块 地 收 了 3857 千克 黄豆 ， 卖出 6000 干 克 ， 其余 的 榨油 ， 每千克 黄豆 可 榨油 0.13 千克 ， 问 可以 榨出 多少 千克 油 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12087", "content": "小 英 高 140 cm ， 比 小 明 矮 (1/8) ， 小 明 高 多少 厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12364", "content": "某 筑路 队 6 月份 修铁路 3000 米 ， 超过 了 原 计划 的 了 (1/5) ， 原 计划 修铁路 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11378", "content": "倒数 是 (2/3) 的 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7460", "content": "小 聪 身高 120 厘米 ， 比 小 明 高 35 厘米 ， 小 明 爸爸 的 身高 是 小 明 的 2 倍 ． 小 明 爸爸 的 身高 = 多少 厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5280", "content": "某 房间 需要 粉刷 的 面积 是 62 平方米 ， 若 每平方米 需要 涂料 0.5 升 ， 在 实际 粉刷 时 有 10% 的 损耗 ． 共 需要 涂料 多少 升 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12572", "content": "超市 运 来 黄瓜 36 箱 ， 运 来 西红柿 45 箱 ， 运 来 青菜 的 数量 是 黄瓜 的 4 倍 ， 运 来 的 青菜 有 多少 箱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3178", "content": "新亚 文具 柜 一天 卖出 18 盒 钢笔 ， 每盒 12 枝 ， 一共 卖出 多少 枝 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15826", "content": "木匠 师傅 要 把 一张 直径 为 1.2 米 的 圆形 桌面 边上 镶上 一圈 金边 ， 金边 条 的 长 至少 应有 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13531", "content": "某 工厂 去年 计划 生产 零件 4500 个 ， 实际 比 计划 多 生产 了 (2/5) ， 实际 生产 零件 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18692", "content": "一 支 钢笔 ， 打 0.8 出售 后 的 价钱 是 12 元 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22304", "content": "小 明 45 分钟 做 270 道口 算题 ， 小 华 每分钟 比 小 明 多 做 2 道 ， 小 华 每分钟 做 几道 口 算题 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21722", "content": "动物园 上午 有 游客 652 人 ， 中午 有 183 人 离去 ． 下午 又 来 了 204 人 ， 这时 园内 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10882", "content": "有 720 个 师生 参加 春游 ， 每辆车 可 坐 48 人 ， 需要 多少 辆车 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20333", "content": "师徒 两 人 共同 加工 一批 零件 ， 3 天 完成 了 (1/4) ， 已知 师傅 独 做 需要 20 天 完成 ． 徒弟 独 做 需要 多少 天 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4993", "content": "申办 2012 年 夏季 7 运 会 第 4 轮 投票 时 ， 伦敦 获得 54 票 ， 取得 了 主办权 ， 比 巴黎 多 获得 8% ， 巴黎 获得 多少 票 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8121", "content": "一 个数 除以 3 后 再 加 6 ， 减 7 ， 再 乘以 5 ， 积 是 10 ， 这个 数 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2346", "content": "一 种 农药 ， 用 药液 和 水 按 1 ： 100 配制 而 成 ． 要 配制 这种 农药 505 千克 ， 需要 药液 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1504", "content": "小 明 今天 看书 63 页 ， 是 昨天 的 (1/9) ． 问 ： 小 明 昨天 看书 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19451", "content": "一 个 平行四边形 相邻 两条 边 的 长度 分别 是 12 cm 和 8 cm 量 得 一条 边上 的 高 为 10 cm ， 这个 平行四边形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21659", "content": "2 个 50 的 积 除 2000 + 500 的 和 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10012", "content": "“ 6 一 ” 儿童节 ， 王老师 为 小朋友 购买 演出 用 的 服装 ， 买 3 件 t恤 和 5 件 短裤 的 钱 同样 多 ． 每件 短裤 42 元 ， 每件 t恤 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19950", "content": "一 项 工程 ， 甲 单独 完成 需要 24 天 ， 是 乙 单独 完成 天数 的 (4/5) ， 两 人 合作 ， 几天 可以 完成 这项 工程 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4488", "content": "甲 数 是 240 ， 乙 数 比 甲 数多 25% ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6295", "content": "建造 一栋 楼房 ， 实际 用 了 240 万元 ， 比 计划 节约 了 20% ． 计划 要 用 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2942", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 比 第一天 多 看 了 全书 的 (4/27) ． 两天 一共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14582", "content": "多少 ： (3/4) = 12 ： (1/8) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22407", "content": "某 居民小区 建设 信息化 小区 ， 共有 720 户 家庭 要 安装 宽带 设备 ， 工程队 工作 12 天 后 ， 已经 完成 了 安装 工作 的 (2/5) ， 还 剩 多少 户 居民 需要 安装 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8526", "content": "菜市场 有 黄瓜 和 西红柿 一共 有 400 千克 ， 西红柿 重量 和 黄瓜 重量 的 比 是 5 ： 3 ， 西红柿 重量 = 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14131", "content": "刚刚 有 9 本书 ， 爸爸 又 给 他 买 了 5 本 ， 小 明 借 去 2 本 ， 刚刚 还有 几本书 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9323", "content": "王师傅 加工 一种 零件 ， 由 原来 的 每个 用 12 分钟 降低 到 每个 8 分钟 ， 原来 每天 加 300 个 ， 现在 每天 加工 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18807", "content": "张 大叔 今年 种 了 45 棵 柳树 ， 种 的 杉树 棵 数 是 柳树 的 23 倍 ， 两种 树 一共 种 了 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10462", "content": "为 举行 庆 国庆 活动 ， 六二 班 学生 要 做 150 面 小旗 ， 已经 做 了 (4/5) ， 还有 多少 面 没有 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6677", "content": "某 学校 原有 跳绳 40 根 ， 其中 短绳 根 数 与 长绳 根 数 的 比 是 5 ： 3 ， 又 买进 一批 短绳 ， 这时 短绳 的 根 数 占 总数 的 75% ． 买进 短绳 多少 根 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2153", "content": "某 修路 队 需要 修 一段 公路 ， 第一天 修 了 (1/5) 千米 ， 第 二 天 修 了 (1/7) 千米 ， 两天 正好 修 了 这 段 公路 的 (1/10) ， 这 段 公路 长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17344", "content": "两个 打字员 合 打 一份 稿件 ， 甲 每 分 打 60 个 字 ， 乙 每 分 打 65 个 字 ， 现在 他们 已 打 了 500 个 字 ， 再 打 16 分 就 可以 完成 任务 ． 这份 稿件 一共 有 多少 个 字 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4286", "content": "一 条 绳子 ， 截去 (3/8) ， 还 剩 25 米 ， 这 条 绳子 有 多长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10372", "content": "甲 筐 里 有 苹果 30 千克 ， 乙 筐 里 有 桔子 若干 千克 ， 如果 从 乙 筐 里 取出 12 千克 桔子 ， 苹果 就 比 桔子 多 10 千克 ， 乙 筐 原有 桔子 多少 千克 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13365", "content": "3 吨 比 多少 吨 少 40% ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8972", "content": "一 种 洗衣机 连续 两次 降价 10% 后 ， 每 台 售价 1660.5 元 ， 这种 洗衣机 每 台 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12974", "content": "植物园 修 一段 围栏 ， 已经 修 了 40% ， 正好 是 80 米 ， 围栏 全长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5659", "content": "书店 有 《 生活 中 的 数学 》 2100 本 ， 上午 卖出 总数 的 (3/7) ， 下午 又 卖出 总数 的 40% ， 这 书店 一共 卖出 几本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11615", "content": "某 养鸡场 卖 一批 肉鸡 ， 第一次 卖出 肉鸡 总数 的 40% ， 第 二 次 卖出 总数 的 25% ， 还 剩 肉鸡 1400 只 ． 养鸡场 原来 有 肉鸡 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20782", "content": "一 个 工厂 原来 制造 机器 零件 1600 个 ， 比 现在 少 20% ， 现在 每天 制造 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2176", "content": "甲 、 乙 两辆 汽车 ， 甲 在 西 地 ， 乙 在 东 地 ， 同时 向东 开行 ． 甲 每 小时 行 60 千米 ， 乙 每 小时 行 48 千米 ， 行 了 5 小时 后 ， 甲 在 乙 后面 24 千米 处 ． 那么 东西 两地 相隔 多少 千米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17887", "content": "两地 相距 300 千米 ， 一列 客车 与 一列 货车 从 两地 同时 相向 而 行 ， 2.5 小时 后 相遇 ， 已知 客车 与 货车 的 速度 比 是 3 ： 2 ， 求 客车 的 速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "267", "content": "有 2 个 小组 的 同学 参加 植树 ， 每个 小组 有 4 个人 ． 一共 有 104 棵 树苗 ， 平均 每人 植树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17138", "content": "红星村 计划 造林 8 公顷 ， 实际 比 计划 多 造林 2 公顷 ， 实际 造林 比 计划 多 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15916", "content": "一 头 狮子 的 寿命 是 60 年 ， 一头 大象 的 寿命 比 狮子 长 (2/5) ． 一头 大象 的 寿命 = 多少 年 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "502", "content": "一 辆 汽车 每 小时 行驶 165 千米 ． 从 甲地 到 乙地 ， 共 行驶 4 小时 ． 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1599", "content": "一 个数 除以 4 商 是 12 ， 余数 是 3 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19058", "content": "什么 数 除以 25 ， 商 是 136 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8545", "content": "兴旺 乡 去年 开挖 鱼池 37.1 公顷 ， 比 原 计划 多 开挖 6% ， 原 计划 开挖 鱼池 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19515", "content": "手表 厂 计划 6 月份 生产 手表 10000 块 ， 结果 生产 了 12500 块 ． 实际 生产 超过 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21103", "content": "某校 派出 60 名 选手 参加 市 少年 田径 邀请赛 ， 其中 女选手 占 (1/4) ． 正式 比赛 时 ， 有 几名 女选手 因故 缺席 ， 这样 就 使 女选手 人数 变为 参赛选手 总数 的 (2/11) ， 求 正式 参赛 的 女选手 人数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "21525", "content": "一 根 钢管 ， 用 去 了 (2/5) 后 还 剩 12 米 ， 这根 钢管 长 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17036", "content": "一 列 从 邯郸 开往 北京 的 火车 ， 在 到 石家庄 站 之前 ， 车上 有 478 人 ， 在 石家庄 站 上车 的 有 328 人 ， 下车 的 乘客 有 288 人 ． 火车 从 石家庄 站 开出 后 ， 车上 共有 乘客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1034", "content": "小 明 想 知道 小区 里 一棵 大树 的 直径 ， 他 用 一条 长 20 米 的 绳子 围绕 一棵树 干 绕 了 6 圈 ， 还 余下 1.16 米 ， 这 棵 树干 的 直径 大约 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9701", "content": "两个 数 的 积 是 900 ， 一个 因数 不变 ， 另 一个 因数 扩大 3 倍 ， 积 变成 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15070", "content": "有 一筐 72 千克 的 苹果 ， 第一天 吃 了 它 的 (1/6) ， 第 二 天 吃 了 它 的 (5/9) ． 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9528", "content": "平平 在 为 汶川 灾区 捐款 活动 中 ， 共 捐款 35 元 ， 露露 捐 的 款 比 平平的 3 倍 少 5 元 ． 露露 捐款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16732", "content": "欢欢 今年 12 年 ， 5 年前 爷爷 的 年龄 是 欢欢 年龄 的 9 倍 ， 爷爷 今年 多少岁 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21826", "content": "光明 小学 有 6 个 年级 ， 每个 年级 有 2 个 班 ， 平均 每班 54 名 学生 ． 光明 小学 共有 多少 名 学生 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2378", "content": "新村 今年 全村 电视机 拥有量 为 612 台 ， 比 去年 增加 2% ， 去年 有 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15753", "content": "有 糖水 300 克 ， 糖 占 糖水 的 20% ； 加 了 一些 水 后 ， 糖 占 糖水 的 12.5% ， 加 了 多少 克 水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17915", "content": "一 批 煤 ， 每次 运 3.5 吨 ， 9 次 运 完 ， 如果 每次 多 运 1 吨 ， 几次 可以 运 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10073", "content": "一 桶 油 ， 空桶 重 2 千克 ， 恰好 比 这个 油 涌 所 装 油 的 30% 少 1 千克 ， 求 这 桶 油 连 桶 共 重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9627", "content": "新华 农场 修 一条 长 7.5 千米 的 水渠 ， 已经 修 了 4 天 ， 每天 修 0.65 千米 ， 剩下 的 要 7 天 修 完 ． 平均 每天 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19884", "content": "7 头 奶牛 5 天 产 牛奶 630 千克 ， 照 这样 计算 ， 15 头 奶牛 8 天 可以 产 牛奶 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7760", "content": "修整 一条 水渠 ， 原 计划 由 8 人 修 ， 每天 工作 7.5 小时 ， 6 天 可以 完成 任务 ； 由于 急 需要 灌水 ， 增加 了 2 人 ， 需要 4 天 完成 ． 每天 要 工作 多少 小时 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22025", "content": "操场上 有 男生 24 人 ， 男生 比 女生 多 (1/3) ． 操场上 有 女生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12096", "content": "一 个 计算器 16 元 ， 王老师 买 了 6 个 ， 付给 售货员 100 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15029", "content": "某 班级 一次 考试 的 平均分 ， 是 70 分 ， 其中 (3/4) 的 同学 及格 ， 他们 的 平均分 是 80 分 ， 不及格 同学 的 平均分 = 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20860", "content": "同学 们 种 下 了 一批 树苗 ， 有 69 棵 成活 了 ， 还有 13 棵 没 成活 ． 成活 的 树苗 棵 数 占 树苗 总 棵 数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15667", "content": "两地 相距 93 千米 ， 甲乙 两 人 骑 自行车 同时 从 两地 相对 出发 ， 经过 3 小时 相遇 ． 相遇 后 又 同时 行使 2 小时 ， 甲乙 两 人 相隔 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22553", "content": "超市 运 来 苹果 和 梨 共 90 筐 ， 苹果 的 筐 数 是 梨 的 80% ． 运 来 梨 多少 筐 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6160", "content": "2 名 工人 3 天 共 生产 4 个 零件 ， 照 这样 计算 ， 5 个 工人 6 天 可以 生产 这种 零件 多少 个 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "150", "content": "6 （ 2 ） 班 有 科技 书 240 本 ， 故事 比 科技 书 少 (1/6) ． 故事书 比 科技 书 少 多少 书 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13356", "content": "有 一个 圆柱形 蓄水池 ， 能 蓄水 753.6 立方米 ， 现 再 挖 深 1.5 米 ， 则 可 蓄水 1224.6 立方米 ， 原来 这个 蓄水池 深 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20191", "content": "某 修路 队 要 修 一条 长 1500 米 长 的 路 ， 原 计划 60 天 修 完 ， 实际 每天 比 原 计划 每天 修 的 2 倍 少 13 米 ， 实际 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4994", "content": "两个 书架 ， 甲 架 存 书 的 (1/4) 等于 乙 架 存 书 的 (2/5) ， 甲 架 比 乙 架 多 存 书 120 本 ， 乙 架 存 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13441", "content": "街心花园 有 24 棵 杨树 ， 有 8 棵 柳树 ， 杨树 的 棵 数 是 柳树 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5884", "content": "张 丽 的 爸爸 每月 工资收入 是 2510 元 ． 工资收入 超过 1600 元 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 他 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9359", "content": "同学 们 进行 广播操 表演 ， 参加 的 女生 有 56 人 ， 男生 有 64 人 ． 如果 每 8 人 站 一排 ， 一共 要 站 多少 排 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19640", "content": "姐弟俩 共 储蓄 315 元 ， 姐姐 储蓄 的 钱 数 占 两 人 储蓄 总额 的 (4/7) ． 8 月份 姐姐 因 有事 ， 连续 取款 两次 后 ， 她 的 存钱 数只 占 两 人 储蓄 总额 的 (5/14) ， 这时 姐弟俩 储蓄 总数 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "873", "content": "某校 三年级 有 4 个 班 ， 共 为 残疾人 捐款 576 元 ， 平均 每人 捐 3 元 ， 平均 每班 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22492", "content": "糕点 加工 ： 中秋佳节 到 了 ， 糕点 厂 加工 一批 “ 桂花 ” 牌 月饼 ， 第一批 加工 了 328 个 月饼 ， 每 4 个 装 1 盒 ， 每 2 盒装 一箱 ， 这些 月饼 可以 装 几箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4070", "content": "一 辆 汽车 要 从 甲地 开往 乙地 ． 先 用 80 千米 / 时 的 速度 在 平 路上 行驶 了 2.5 小时 ， 然后 用 68 千米 / 时 的 速度 在 上坡路 上 行驶 了 0.5 小时 到达 乙地 ． 问 这辆 车 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7540", "content": "多少 的 7 倍 是 490 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20323", "content": "水果店 有 柑橘 156 箱 ， 苹果 比 柑橘 的 5 倍 少 38 箱 ． 水果店 有 苹果 多少 箱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17063", "content": "客 、 货 两列 火车 分别 从 东西 两地 同时 出发 ， 相向 而 行 ． 6 小时 后 ， 客车 距 西 地 还有 全程 的 (1/8) ， 货车 距 东 地 还有 50 千米 ． 如果 客车 每 小时 比 货车 多行 4 千米 ， 东西 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21970", "content": "一 个 篮球 打 0.9 出售 后 ， 售价 72 元 ， 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10841", "content": "食堂 运 来 24 吨 煤 ， 用 去 了 它 的 (5/12) ， 食堂 还 余 多少 吨 煤 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1199", "content": "某 厂 要 生产 300 吨 化工原料 ， 计划 24 天 完成 ， 实际 每天 多 生产 2.5 吨 ． 这样 ， 实际 几天 可以 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20082", "content": "李师傅 加工 一批 零件 ， 已经 加工 了 全部 零件 的 (1/3) 还 多 16 个 ， 余下 的 比 已 加工 的 还 多 48 个 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7563", "content": "公园 里 有 杨树 235 棵 ， 柳树 比 杨树 的 1.2 倍 少 45 棵 ． 公园 里 有 柳树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4266", "content": "小 方 用 300 元 买 了 2 年期 的 国库券 ， 年利率 为 2.8% ， 到期 后 他 把 利息 捐给 了 “ 希望工程 ” ． 小 方 捐 了 多少 元 给 “ 希望工程 ” ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17655", "content": "学校 买 6 部 电话 ， 每部 130 元 ， 一共 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5157", "content": "王老师 打印 一份 10 页 的 复习资料 ， 每页 26 行 ， 每行 28 个 字 ， 这份 复习资料 有 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11155", "content": "学校 开展 植树造林 活动 中 ， 五年级 植 了 500 棵 树 ， 比 四年级 多 植 160 棵 ， 4 、 五年级 植树 棵 数 的 总和 正好 是 三年级 的 3 倍 ， 三年级 植 了 多少 棵 树 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13234", "content": "一 位 自行车 运动员 每天 训练 要 骑 自行车 78 千米 ， 一个月 （ 31 天 ） 要 骑 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4736", "content": "某 工厂 要 生产 4500 个 零件 ， 计划 25 天 完成 ， 实际 提前 5 天 完成 ， 实际 每天 生产 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4575", "content": "从 a 城 到 b 城 ， 甲 车 需要 行驶 (1/3) 小时 ， 乙 车 需要 行驶 (1/4) 小时 ． 甲 车 的 速度 是 乙 车 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5996", "content": "牛奶 专卖店 今天 卖出 加 钙 牛奶 40 包 ， 恰好 是 纯牛奶 的 (2/5) ． 今天 卖出 的 纯牛奶 又 正好 是 酸牛奶 的 (5/6) ， 今天 卖出 酸牛奶 多少 包 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3377", "content": "盒子 里 有 4 种颜色 的 小球 若干个 ， 一次 拿 多少 个 就 一定 有 两个 小球 同 色 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22881", "content": "甲 数 是 6.2 ， 乙 数 比 甲 数 的 2 倍 多 3 ， 两 数 的 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5508", "content": "百姓 超市 进 了 一种 毛巾 共 50 箱 ， 批发价 每箱 615 元 ， 零售价 每块 毛巾 6.8 元 ， 全部 卖出 可 得 毛利 多少 元 ？ （ 一 箱内 有 100 块 毛巾 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12880", "content": "某 商品 先后 两次 降价 ， 第一次 降价 10% ， 第 二 次 降价 20% ， 现价 相当于 原价 的 百分之几 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1989", "content": "48.83 + 126.3 再 减去 45 ， 结果 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8370", "content": "一 列 火车 从 甲 城 出发 ， 经过 乙 城 去 丙 城 ， 共 行 715 千米 ， 从 甲 城 到 乙 城 用 4 小时 ， 从 乙 城 到 丙 城 用 7 小时 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4867", "content": "学校食堂 原有 大米 (3/4) 吨 ， 前 3 天 每天 吃掉 (1/8) 吨 ， 剩下 的 2 天 吃 完 ， 剩下 的 平均 每天 吃 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15552", "content": "在 一次 过程 测试 中 ， 敬 丹丹 语文 考 了 95 分 ， 比 数学 多 考 了 (2/17) ， 比 数学 多 考 了 多少 分 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15819", "content": "2012 年 伦敦 残奥会 取得 了 圆满成功 ， 这 是 时 至 当时 参赛 人 数最多 的 一届 残奥会 ． 在 此次 残奥会 上 ， 中国 代表团 获得 奖牌 231 枚 ， 高 居首位 ． 英国 代表团 获得 的 奖牌 是 中国 的 (40/77) ， 德国 代表团 获得 的 奖牌数 是 英国 的 (11/20) ， 德国 代表团 获得 奖牌 多少 枚 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2985", "content": "王 叔叔 从 县城 出发 去 王 庄 送 化肥 ． 去 的 时候 速度 为 40 千米 / 时 ， 经过 3 小时 到达 ， 返回 时 用 了 2 小时 ， 返回 时 比 去 时 的 速度 快 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5997", "content": "在 “ 情 系 玉树 ， 大 爱 无疆 ” 捐款 活动 中 ， 光明 小学 四年级 3 个 班 共 捐款 2400 元 ， 平均 每班 有 学生 40 人 ， 平均 每人 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2843", "content": "某校 有 女生 180 人 ， 占 全校学生 总数 40% ， 学校 有 多少 学生 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7913", "content": "底面 直径 是 2 分 米 ， 高 是 1 分 米 的 圆柱体 的 表面积 = 多少 平方分米 ．", "knowledge": ["*", "+", "/", "^"], "difficulty": 0.6, "length": 15}
-{"question_id": "8113", "content": "学校 买来 3 大包 纸 ， 每包 250 张 ， 共 付 262.5 元 ， 买 一张 纸 大约 要 付 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1617", "content": "360 是 一个 数 的 45 倍 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20430", "content": "1632 连续 减去 3 ， 最 多 能 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17105", "content": "一 只 兔子 0.5 小时 跑 22.5 千米 ， 一只 长颈鹿 每 小时 跑 50.85 千米 ． 这 只 长颈鹿 的 速度 是 兔子 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1194", "content": "小 明 家 买来 一袋 大米 ， 重 15 千克 ， 吃 了 (2/5) ， 吃 了 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10759", "content": "有 两个 袋子 ， 都 装 着 红球 和 白 球 ． 从 第一个 袋子 中 摸 出 红球 的 概率 是 (1/4) ， 从 第 二 个 袋子 里 摸 出 红球 的 概率 是 (1/3) ． 两个 袋子 里 都 摸 出 白 球 的 概率 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4578", "content": "水果店 运 来 苹果 18 箱 ， 香蕉 22 箱 ． 两种 水果 每箱 都 重 15 千克 ． 运 来 的 苹果 和 香蕉 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20883", "content": "a 车 每 小时 行 120 千米 ， b 车 每 小时 行 100 千米 ． 两车 从 甲乙 两地 同时 相对 开出 ， 4 小时 后 还 相距 30 千米 ， 甲乙 两地 之间 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9846", "content": "三年级 共有 学生 224 人 ， 平均 分成 4 个 班 ， 每班 编成 7 组 ． 每组 有 多少 名 学生 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8372", "content": "一 个 口袋 里 有 6 个 黑 球 ， 4 个 白 球 ， 至少 从中 取出 多少 个 球 ， 才能 保证 其中 必 有 白 球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10379", "content": "行 一段路 ， 甲乙 两 人 所用 的 时间 的 比 是 4 ： 5 ， 甲 的 速度 是 乙 的 多少 ．", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1052", "content": "一 个 游泳池 ， 长 50 米 ， 宽 20 米 ， 深 2 米 ， 现在 要 给 游泳池 的 4 壁 和 底面 抹 水泥 ， 抹 水泥 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "13727", "content": "学校 买来 科技 书 120 本 ， 是 文艺 书 的 (3/5) ． 学校 买来 文艺 书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "295", "content": "甲 数 的 (1/3) 等于 乙 数 (3/8) ， 乙 数 是 16 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20316", "content": "100 克 油菜籽 可以 榨油 32 克 ， 榨 1 克 油 要 多少 克 油菜籽 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13634", "content": "同学 们 大扫除 ， 打扫 操场 的 有 36 人 ， 是 打扫 教室 的 人数 的 3 倍 ， 打扫 院子 的 有 27 人 ． 参加 大扫除 的 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10631", "content": "商 和 余数 都 是 7 ， 除数 是 8 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16908", "content": "某 种植 专业户 运 来 一批 农药 ， 第一天 用 去 总数 的 (4/7) ， 比 第 二 天 用 去 的 2 倍 还 多 12 千克 ， 这时 用 去 的 与 余下 的 农药 比 是 27 ： 8 ， 这 批 农药 有 多少 千克 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "13039", "content": "一 条 铁路 已经 修 了 95.8 千米 ， 剩下 的 一段 比 修好 的 少 25.8 千米 ， 这 条 铁路 一共 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20189", "content": "李 可 在 一家 玩具厂 工作 ， 她 5 天 装配 了 400 个 机器人 ． 照 这样 的 工作效率 ， 要 装配 880 个 同样 的 机器人 ， 要 用 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2998", "content": "姊姊 做 劳作 将 一条 锻 带 每 56.45 公分 剪成 一段 ， 共 剪 了 34 段 ， 还 剩下 25.7 公分 ， 这 条 锻 带有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10717", "content": "王 大伯 家 收 了 (5/8) 吨 白菜 ， 收 的 萝卜 比 白菜 少 (1/5) ． 王 大伯 家 收 萝卜 和 白菜 共 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2900", "content": "甲 、 乙 两 人 同时 从 学校 去 电影院 ， 甲 骑 自行车 每分钟 走 150 米 ， 乙 步行 每 分 走 80 米 ， 9 分钟 后 ， 甲 、 乙 两 人 相距 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18739", "content": "一 个 玩具厂 做 一个 小熊 玩具 原来 要 用 7.6 元 的 材料 ， 后来 改进 方法 ， 每 只 只 需 7.2 元 的 材料 ， 原来 准备 做 360 个 的 材料 ， 现在 可以 做 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9374", "content": "多少 的 (3/4) 是 27 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13511", "content": "一 个数 增加 100 ， 然后 缩小 5 倍 ， 再 减去 40 ， 得 30 ， 这个 数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21472", "content": "(1/7) + (5/7) * (7/8) + (3/8) - (1/3) + (4/9) - (1/4) = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "19464", "content": "一 种 花生 的 出油率 是 35% ， 要 榨出 350 千克 的 花生油 ， 需要 这种 花生 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11690", "content": "甲乙 两 数 的 比 是 3 ： 4 ， 说明 甲 比 乙 少 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4793", "content": "小 明 看 一 本书 ， 如果 每天 看 15 页 ， 24 天 看 完 ， 如果 每天 看 20 页 ， 几天 可以 看 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16551", "content": "用 2000 个 鸡蛋 孵小鸡 ， 结果 有 5% 的 没有 孵化 出 小鸡 ， 孵化 出 小鸡 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5668", "content": "一 种 商品 的 售价 是 960 元 ， 比 原来 便宜 了 240 无 ， 这件 商品 降价 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20101", "content": "计算 ： 223 * 7.5 + 22.3 * 12.5 + 230 / 4 - 0.7 * 2.5 + 1 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "16611", "content": "修 一条 水渠 ， 修 了 7 天 ， 每天 修 50 米 ， 剩下 的 任务 按 原来 的 速度 继续 修 ， 6 天 可以 完成 任务 ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18946", "content": "一 个数 的 (4/7) 等于 14.3 与 6.1 的 差 ． 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7986", "content": "一 桶 水 ， 用 去 它 的 (3/4) ， 正好 是 15 千克 ， 这 桶 水 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9723", "content": "甲乙 两地 相距 200 km ， 一辆 汽车 行 了 全程 的 (4/5) ， 行 了 多少 km ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2594", "content": "80 的 25% + (1/4) 的 (1/5) = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8316", "content": "粮店 运 来 大米 248 袋 ， 运 来 白面 的 袋 数 比 大米 的 2 倍 少 50 袋 ， 运 来 白面 多少 袋 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12109", "content": "快慢 两车 分别 从 甲乙 两地 相向 而 行 ， 相遇 后 继续前进 ， 在 两车 相距 210 千米 时 ， 快车 行 了 全程 的 (3/4) ， 慢 车行 了 全程 的 (3/5) ， 求 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17449", "content": "笑笑 做 种子 发芽试验 ， 有 485 粒 种子 发芽 ， 种子 发芽率 是 97% ， 你 知道 笑笑 用 多少 粒 种子 做 试验 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "778", "content": "汽车 从 甲地 开往 乙地 ， 每 小时 行 48 千米 ， (1/2) 小时 行 了 全程 的 (3/4) ， 照 这样 计算 还有 多少 时间 才能 行 完全 程 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9925", "content": "洞庭湖 近几年 面积 减少 40% ， 原来 它 的 面积 约 为 4350 km ^ 2 ， 现在 它 的 面积 约 为 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11872", "content": "学校 要 为 图书馆 增添 儿童 百科 和 数学 猜想 两种 新书 ， 每种 3 套 ． 儿童 百科 每套 125 元 ， 数学 猜想 每套 18 元 ． 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6013", "content": "一 根 绸带 ， 第一次 用 去 全长 的 (1/4) ， 第 二 次 用 去 11 米 ， 这时 用 去 的 与 剩下 的 长度 比 是 1 ： 2 ． 这根 绸带 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5180", "content": "王 大伯 参加 了 我 区 新型农村 合作 医疗保险 ． 条款 规定 ： 住院 医疗费 补偿 起 付 线 区级 医院 800 元 ， 在 起 付 线 以上 的 部分 按 55% 补偿 ． 今年 王 大伯 患 急性 肠炎 在 区 人民 医院 住院治疗 12 天 ， 共计 医疗费 6200 元 ． 按规定 王 大伯 自付 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19065", "content": "果农 们 给 650 棵 果树 打 农药 ， 已经 打 了 375 棵 ． 剩下 的 让 5 人 完成 ． 平均 每人 要 给 多少 棵 打 药 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19016", "content": "比 9 的 180 倍 少 30 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17815", "content": "据统计 ， 全世界 有 桦树 40 种 ， 其中 我国 桦树 种类 占 (11/20) ， 我国 有 多少 种 桦树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10118", "content": "修 一条 路 ， 没 修 的 比 修 了 的 多 30% ， 没 修 的 有 260 米 ， 修 了 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17192", "content": "用 3 辆 汽车 每次 可 运 大米 450 袋 ， 用 同样 的 的 汽车 8 辆 ， 每次 可以 运 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13677", "content": "汽车 每 小时 行 85.5 千米 ， 1.04 小时 行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10126", "content": "一 辆 汽车 2 小时 行驶 140 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 共 行驶 5 小时 ． 甲乙 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15986", "content": "a 、 b 两城 的 公路 长 400 千米 ， 一辆 汽车 从 a 城 开往 b 城 ， 第一 小时 行 了 全程 的 (1/8) ， 第 二 小时 行 了 全程 的 (3/10) ， 还 剩下 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22403", "content": "甲 、 乙 两地 相距 810 千米 ， 一辆 汽车 以 每 小时 60 千米 的 速度 从 甲地 开往 乙地 ， 行驶 了 13 小时 后 ， 离 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11141", "content": "建筑工地 需要 沙子 106 吨 ， 先 用 小汽车 运 15 次 ， 每次 运 2.4 吨 ． 剩下 的 改用 大车 运 ， 每次 运 5 吨 ， 还要 几次 运 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18180", "content": "一 个数 的 7 倍 是 (14/15) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10754", "content": "书店 “ 儿童读物 ” 一律 0.6 出售 ， 小 明 用 15 元 买 了 一本 童话 ， 这 本书 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "697", "content": "小 明 在 铁路 旁边 沿 铁路 方向 的 公路 上 散步 ， 他 散步 的 速度 是 每秒 2 米 ， 这时 从 他 后面 开 过来 一列 火车 ， 从 车头 到 车尾 经过 他 身旁 共用 了 21 秒 ， 已知 火车 全长 336 米 ， 求 火车 每秒 行 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22911", "content": "亮亮的 身高 是 1.25 米 ， 爸爸 的 身高 是 亮亮的 1.4 倍 ， 爸爸 比 亮 亮 高 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8888", "content": "两个 因数 的 积 是 (11/22) ， 其中 一个 因数 是 (22/9) ， 求 另 一个 因数 的 算式 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7025", "content": "某 汽车 制造厂 ， 去年 生产 轿车 15 万辆 ， 相当于 生产 大 货车 的 (5/12) ． 生产 大 货车 多少 万辆 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19937", "content": "小巧 带 了 216 元 去 买 水果 ， 如果 买 梨 正好 可以 买 18 千克 ； 如果 买 苹果 只能 买 12 千克 ． 每千克 苹果 比 每千克 梨 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3023", "content": "一 个 饲养场 ， 养鸭 800 只 ， 养 的 鸡 比 鸭 少 (1/5) ， 养 的 鸡 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9536", "content": "一 辆 汽车 从 甲地 去 乙 地拉 货 ， 去 时 空车 每 小时 行 105 千米 ， 3.2 小时 到达 ． 返回 时 用 了 4.2 小时 ， 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19379", "content": "挖 一条 200 千米 的 水渠 ， 第一周 挖 了 全长 的 (1/4) ， 第 二 周 挖 了 全长 的 (1/5) ． 两周 一共 挖 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22066", "content": "甲乙 两车 从 相距 600 千米 的 两地 同时 相对 开出 ， 4 小时 两车 共 行 了 全程 的 (4/5) ． 乙 车 每 小时 行 50 千米 ， 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1441", "content": "有 150 本 故事书 ， 93 本 科技 书 ． 平均 放在 3 个 书架上 ， 每个 书架 放 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8854", "content": "18 支 球队 参加 比赛 ， 最后 有 6 支队 进入 决赛 ． 进入 决赛 的 队 占 所有 参赛队 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17936", "content": "一 艘 轮船 每 时 航行 12.5 千米 ， 48 时 到达 目的地 ． 如果 每 时 航行 15 千米 ， 这 艘 轮船 需要 几时 才能 到达 目的地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14891", "content": "一 艘 快艇 和 一艘 轮船 分别 从 a 、 b 两地 同 向 出发 到 c 地 去 ， 快艇 在 后 ， 每 小时 行 42 千米 ， 轮船 每 小时 行 34 千米 ， 2.5 小时 后 它们 同时 到达 c 地 ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16320", "content": "5 （ 1 ） 班 有 学生 45 人 ， 其中 男生 占 (4/9) ， 男生 中 近视 的 人数 占 男生 人数 的 10% ． 近视 的 男生 有 多少 人 ？ ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6464", "content": "打字员 小 芳 平均 每分钟 打 85 个 字 ， 她 打 一篇 文稿 刚好 用 了 40 分钟 ， 这 篇 文稿 有 多少 字 ？ 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13918", "content": "某 小学 有 男生 630 人 ， 是 女生 的 (7/8) ， 全校 共有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17837", "content": "玲玲 有 零花钱 21 元 ， 卖 废纸 又 收入 29.4 元 ， 用 这些 钱 刚好 可以 买 6 本 《 动手做 》 ， 每 本 《 动手做 》 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4975", "content": "某班 男生 占 全班 人数 的 (5/9) ， 女生 占 男生 人数 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15936", "content": "一 个 装满 小麦 的 圆柱形 粮囤 高 2.5 米 ， 占地面积 16 平方米 ． 把 这些 小麦 全部 装进 粮仓 中 ， 正好 占 整个 粮仓 的 40% ， 这个 粮仓 的 容积 = 多少 立方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17530", "content": "小 华 要 写 25 个 毛笔字 ， 已经 写 好 了 (4/5) ， 写 好 了 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14230", "content": "果园 里 有 318 棵 苹果树 ， 是 梨树 棵 数 的 3 倍 ， 苹果树 和 梨树 一共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9529", "content": "小 丽 和 妈妈 的 年龄 相差 24 岁 ， 妈妈 的 年龄 是 小 丽 的 4 倍 ， 小 丽 今年 多少岁 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19834", "content": "3 、 四年级 采集 树种 ． 四年级 采集 了 共 24.08 千克 ， 比 三年级 多 采 了 3.4 千克 ， 两个 年级 共 采集 了 多少 千克 ？ ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11223", "content": "学校食堂 买来 大米 850 千克 ， 运 了 3 车 ， 还 剩 100 千克 ． 平均 每 车运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6688", "content": "学校 图书室 有 8400 本 图书 ， 其中 科技 书 占 全部 的 (3/8) ， 文艺 书 占 全部 的 (4/21) ， 其余 是 儿童读物 ， 儿童读物 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4617", "content": "妈妈 买来 22.5 米 布 做 裤子 ， 如果 每 条 裤子 用布 1.25 米 ， 这些 布 可以 做 几条 裤子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15474", "content": "当 甲 在 60 米 赛跑 中 冲 过 终点线 时 ， 比 乙 领先 10 米 、 比 丙 领先 20 ， 如果 乙 和 丙 按 原来 的 速度 继续 冲向 终点 ， 那么 当 乙 到达 终点 时 将 比 丙 领先 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9209", "content": "多吉 家养 了 山羊 、 绵羊 和 牦牛 3 种 家畜 ， 山羊 和 绵羊 的 数量 占 家畜 总数 的 (8/9) ， 绵羊 和 牦牛 的 数量 占 家畜 总数 的 (11/18) ， 绵羊 有 90 只 ， 多吉 家 共有 家畜 多少 只 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20929", "content": "两个 因数 的 积 是 (5/12) ， 一个 因数 是 (1/3) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15062", "content": "公园 有 40 棵 桃树 ， 柳树 的 棵 树 是 桃树 的 10 倍 ， 柳树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8180", "content": "一 个数 是 3 的 倍数 ， 又 是 5 的 倍数 ， 同时 又 是 6 的 倍数 ． 你 可以 写出 多少 个 这样 的 数 ？ 最小 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4826", "content": "水果 行运 来 橘子 135 千克 ， 是 香蕉 的 3 倍 ， 运 来 的 苹果 是 香蕉 的 2 倍 还 多 26 千克 ， 水果店 运 来 苹果 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15227", "content": "一 套 衣服 用布 2 米 ， 一匹 布 做 了 这样 的 28 套 衣服 后 ， 还 剩下 16 米 ， 这 匹 布 一共 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7858", "content": "80 / 25 的 商 = ， 它 = 多少 小数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22918", "content": "修路 队 修 一条 1575 米 长 的 公路 ， 修 了 15 天 后 ， 还 剩下 360 米 没有 修 完 ． 这个 修路 队 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20895", "content": "筑路 队 修 一条 10 千米 的 公路 ． 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 5 米 ， 还有 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12940", "content": "学校 为 每班 作 2 个 窗帘 ， 每个 窗帘 的 价格 是 48 元 ， 全校 20 个 班 ， 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10610", "content": "李老师 上楼 上课 ， 每 层楼 阶 12 级 ， 一共 有 48 级 ， 李老师 上 多少 楼 上课 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14039", "content": "小 红 和 小 丽 一起 去 公园 玩 ， 两 人 身上 所 带 钱 的 和 比 小 红 多 12 元 ， 比 小 丽 的 钱 多 27 元 ， 两 人 共 带 多少 元 钱 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5493", "content": "学校食堂 运 来 一批 大米 ， 吃掉 了 219 袋 ， 剩下 的 是 吃掉 的 7 倍 ， 这 批 大米 原来 有 多少 袋 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "458", "content": "学校 共 展出 了 336 件 标本 ， 每块 展板 排 6 行 ， 每行 放 8 件 ． 可以 放满 几块 展板 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5786", "content": "生产 一批 零件 ， 计划 每天 生产 80 个 ， 15 天 完成 ， 实际 每天 多 生产 20 个 ， 可以 提前 几天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "202", "content": "小 明 和小红 一起 玩 踢毽子 游戏 ． 小 红 对 小 明说 ： “ 我 踢 了 100 个 ， 你 比 我 少 (1/5) ” 你 知道 小 明 踢 了 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13342", "content": "洋洋 家 离 学校 的 距离 是 5 千米 ， 这样 一天 来回 4 趟 ， 需要 走 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17623", "content": "一 只 蜗牛 沿着 柱子 往上爬 ， 每天 清晨 到 傍晚 向 上爬 5 米 ， 夜间 又 滑 下 4 米 ， 按 这样 的 爬 法 ， 蜗牛 爬 了 20 天 到达 柱 顶 ． 这根 柱子 有 多 高 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7275", "content": "把 (2/3) 吨 平均 分成 多少 份 ， 每份 是 (1/9) 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12763", "content": "一 根 铁丝 长 (2/3) 米 ， 比 另 一根 短 (1/2) 米 ， 两根 铁丝 一共 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10097", "content": "从 535 连续 减去 多少 个 5 ， 结果 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4980", "content": "甲乙 两辆 汽车 同时 从 相距 504 km 的 a ， b 两城 相对 开出 ， 甲 车 每 小时 行 45 km ， 比 乙 车 每 h 的 速度慢 (1/4) ， 几小时 两车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "572", "content": "小 红 和 小 芳 去 必胜客 吃 比萨 ， 小 红 吃 了 一块 比萨 的 (3/8) ， 小 芳 吃 了 一块 比萨 的 (1/2) ， 小 红 与 小 芳 一共 吃 了 这块 比萨 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15448", "content": "从 1500 里 连续 减去 多少 个 24 ， 还 剩 300 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7892", "content": "新建 一所 小学 ， 计划 用款 400 万元 ， 实际 用 去 380 万元 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20849", "content": "一 种 花布 每 米 售价 18.5 元 ， 买 3.6 米 花布 的 钱 可以 买 7.2 米 白布 ， 每 米 白布 需要 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6387", "content": "动物园 有 狮子 18 只 ， 比 老虎 的 只 数 少 (1/4) ， 动物园 的 老虎 比 狮子 多 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7036", "content": "多少 的 (3/5) 是 6 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11125", "content": "一 堆 棋子 有 黑白 两种 颜色 ， 其中 黑子 占 (1/5) ， 若 增加 到 10 枚 白子 ， 这时 黑子 占 (2/7) ． 那么 ， 这 堆 棋子 有 多少 枚 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13813", "content": "希望 小学 六年级 （ 2 ） 班 有 男生 50 人 ， 女生 20 人 ， 女生 比 男生 少 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3412", "content": "苗苗 果园 有 2300 筐 苹果 ， 4 辆 汽车 参加 运输 ， 每辆 汽车 一次 可 运 25 筐 ， 几次 可以 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "360", "content": "小 芳 将 一根 丝带 剪成 同样 长 的 8 段 ， 每 段长 (1/10) m ． 这根 丝带 原来 长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7785", "content": "一 袋 面粉 重 25 千克 ， 食堂 买 了 8 袋 面粉 ， 一共 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16083", "content": "工地 有 一堆 沙 20 吨 ， 第一天 运走 总数 的 (1/5) ， 第 二 天 运走 40% ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16461", "content": "78 / 15 与 12 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7260", "content": "水果店 卖出 草莓 82 千克 ， 比 荔枝 多 28 千克 ， 卖出 荔枝 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11274", "content": "甲 数 是 乙 数 的 5 倍 ， 那么 乙 数 是 甲 数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17905", "content": "山东 烟台 是 全国 著名 的 “ 苹果 之 乡 ” ， 其 优良品种 “ 国光 ” 今年 亩产 达到 820 千克 ． 如果 每千克 “ 国光 ” 苹果 的 价格 是 7.5 元 ， 新星 果园 的 种植 面积 比 去年 扩大 了 6.5 亩 ， 这个 果园 比 去年 多 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4685", "content": "一 本书 共有 145 页 ， 王 小 艳 已经 看 了 45 页 ， 剩下 的 要 在 5 天 内 看 完 ， 剩下 的 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11826", "content": "进修 附小 五年级 一班 有 学生 45 人 ， 其中 女生 占 (5/9) ， 女生 中 又 有 (4/5) 的 学生 爱看 《 窗 边 的 小豆豆 》 ， 五年级 一班 有 多少 女生 爱看 《 窗 边 的 小豆豆 》 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7859", "content": "阿姨 在 超市 花 74.8 元 买 了 一桶 5 千克 的 食用油 ， 正值 超市 在 做 促销 活动 ， 赠送 一瓶 0.5 千克 的 同样 的 食用油 ， 平均 每千克 食用油 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3390", "content": "六年级 有 男生 130 人 ， 女生 120 人 ， 六年级 学生 占 全校学生 总数 的 (1/5) ． 全校 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15754", "content": "小 明 买 了 两本书 ， 《 格林童话 》 18.5 元 ， 《 新华字典 》 11.3 元 ， 小 明 付出 50 元 ， 应 找回 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4195", "content": "20 克 盐 溶解 在 1000 克 水中 ， 盐 占 盐水 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5673", "content": "蜜蜂 每秒 飞行 6.7 米 ， 比 蜻蜓 飞行 的 速度慢 33% ． 蜻蜓 每秒 飞 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8646", "content": "一 根 绳子 ， 第一次 减去 (3/8) ， 第 二 次 减去 余下 的 (1/5) ， 还 剩 24 米 ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22934", "content": "蔬菜 商店 运 来 黄瓜 和 西红柿 共 350 千克 ， 其中 黄瓜 的 重量 占 全部 的 (3/7) ， 运 来 黄瓜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7029", "content": "把 83 扩大 100 倍 后 ， 比 原 数 增加 了 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12750", "content": "计算 1.68 / 0.15 ， 当 商 是 11 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15328", "content": "超市 运进 8 箱 苹果 ， 每箱 48 千克 ， 卖掉 150 千克 后 ， 还 剩下 多少 千克 苹果 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21651", "content": "幼儿园 做 了 红 、 黄花 共 50 朵 ， 其中 红花 占 40% ， 后来 又 做 了 几朵 红花 后 ， 这时 红花 和 黄花 的 朵 数 正好 相等 ， 后来 又 做 了 多少 朵 红花 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "2047", "content": "操场上 跑步 的 人 有 153 人 ， 比 做操 的 多 23 人 ， 操场上 跑步 的 和 做操 的 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1100", "content": "两车 同时 从 甲 、 乙 两站 相向 而 行 ， 甲 车 的 速度 是 54 千米 / 时 ， 是 乙 车 速度 的 (3/4) ， 3.5 时 后 两车 相遇 ． 甲 、 乙 两站 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21422", "content": "一 个 比例 中 ， 两个 内 项 分别 是 10 和 (4/5) ， 其中 一个 外 项 是 4.5 ， 另 一个 外 项 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10558", "content": "修路 队 要 修 一条 公路 ， 已经 修 了 74 米 ， 还 剩 18 米 ， 这 条 公路 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1730", "content": "一 个 无盖 的 长方体 铁盒 ， 底面 是 边长 为 3 分 米 的 正方形 ， 高 4 分 米 ； 做 这个 铁盒 至少 要 用 铁皮 多少 平方分米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "6662", "content": "一 个数 扩大 到 它 的 100 倍 后 比 原 数多 321.75 ， 原 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1983", "content": "两辆 汽车 同时 从 两地 出发 ， 相向 而 行 ， 甲 每 小时 行 65 千米 ， 乙 每 小时 行 60 千米 ， 经过 4.8 小时 两车 相遇 ． 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14873", "content": "妈妈 带 了 100 元 钱 去 中西 仓储 购物 ， 买 食品 用 了 43.7 元 ， 买 生活用品 用 去 36.9 元 ， 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22442", "content": "3 个 小 动物 比 身高 ， 小 猴 高 0.85 米 ， 梅花鹿 比 小 猴 高 0.35 m ， 梅花鹿 比 长颈鹿 矮 0.94 m ， 长颈鹿 的 身高 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12334", "content": "一 种 手机 原价 是 1600 元 ， 现在 打 0.9 出售 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15616", "content": "甲乙 两地 相距 400 千米 ， 一辆 汽车 从 甲地 到 乙地 要 10 小时 ， 另 一辆 汽车 从 乙地 到 甲地 要 8 小时 ． 现在 两辆 汽车 同时 从 甲乙 两地 相对 开出 ， 经过 几小时 可以 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4337", "content": "1.3 / 7.8 的 商 ， 减去 2.4 与 3.6 的 和 ， 差 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16747", "content": "学校 新 买 一批 图书 ， 其中 连环画 与 科技 书本 数 的 比 是 3 ： 5 ， 连环画 比 科技 书 少 240 本 ， 科技 书 和 连环画 共 买 了 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19892", "content": "在 一个 暗箱 里 放 有 a 个 除 颜色 外 其他 完全相同 的 球 ， 这 a 个 球 中 只有 6 个 红球 ． 每次 将 球 搅拌 均匀 后 ， 任意 摸 出 一个 球 记下 颜色 再 放 回 暗箱 ． 通过 大量 重复 摸 球 实验 后 发现 ， 摸 到 红球 的 可能性 稳定 在 (1/4) ， 那么 可以 推算出 a 大约 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9859", "content": "超市 运 来 大米 和 面粉 各 20 袋 ， 大米 每 袋 是 52 元 ， 面粉 每 袋 是 65 元 ． 这些 粮食 一共 可以 卖 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22582", "content": "商店 运 来 250 千克 苹果 ， 运 来 的 梨 比 苹果 多 20% ， 运 来 的 梨 正好 是 橘子 的 (3/4) ， 运 来 橘子 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15758", "content": "在 跳远 比赛 中 ， 田 田 跳 了 3.02 米 、 乐乐 比 田 田 少 跳 了 0.15 米 ， 方方 比 乐乐 多 跳 了 0.18 米 ， 方方 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16138", "content": "图书馆 买 了 一批 新书 ， 其中 科技 书 占 总数 的 (1/9) ， 故事书 占 总数 的 (6/9) ， 其余 的 是 连环画 ， 连环画 占 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16076", "content": "在 第 29 届 北京 奥运会 上 ， 美国 代表团 获得 了 36 枚 金牌 ， 相当于 中国 代表团 的 (12/17) ， 中国 代表团 获得 了 多少 枚 金牌 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4748", "content": "水果店 上午 运 来 18 筐 苹果 ， 每 筐 30 千克 ， 下午 运 来 860 千克 苹果 ， 水果店 上 、 下午 共运 来 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21047", "content": "星星 水果店 运 来 一些 水果 ， 梨 的 筐 数 是 苹果 筐 数 的 0.75 倍 ， 苹果 的 筐 数 是 橘子 筐 数 的 (4/5) ． 运 来 梨 15 筐 ， 运 来 橘子 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15270", "content": "一 辆 货车 每 小时 行 26 千米 ， 一辆 面包车 的 速度 是 这辆 货车 的 3 倍 ， 这辆 面包车 每 小时 行 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "422", "content": "李 奶奶 在 菜市场 买 了 5.2 千克 的 茄子 ， 付出 20 元 ， 找回 4.4 元 ， 每千克 茄子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2058", "content": "养鸡场 上午 收 鸡蛋 85 千克 ， 卖出 42 千克 ， 下午 收 鸡蛋 26 千克 ． 现在 共有 鸡蛋 多少 千克 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6973", "content": "学校 开 运动会 为了 布置 会场 ， 五年级 买 了 700 个 气球 ， 四年级 是 五年级 买 的 气球 的 2 倍 ， 四年级 买 了 多少 个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23114", "content": "9 个 ■ 的 (1/3) = 多少 个 ■ ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6509", "content": "一 个 长方形 长 是 15 分 米 ， 宽 是 10 分 米 ， 从 这个 长方形 厘米 减去 一个 最大 的 正方形 ， 剩余 的 面积 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2898", "content": "7 吨 水泥 ， 每次 运走 它 的 20% ， 多少 次 运 完 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1664", "content": "一 瓶 橙子 粉 500 千克 ． 每 冲 一杯 需要 16 千克 橙子 粉 和 9 千克 白糖 ， 冲 完 这 瓶 橙子 粉 ， 大约 需要 多少 千克 白糖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21655", "content": "某 超市 促销 活动 ， 一件 衣服 打 0.8 出售 ， 便宜 了 30 元 ， 这件 衣服 的 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1887", "content": "一 个 等腰三角 形 周长 为 60 厘米 ， 它 的 两条 边 的 比 为 2 ： 5 ， 则 这个 三角形 的 腰 长 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9630", "content": "一 本书 的 (1/4) ， 比 它 的 (1/3) 少 12 页 ， 这 本书 有 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16707", "content": "把 一个 长 是 6 厘米 ， 宽 是 5 厘米 ， 高 是 4 厘米 的 长方体 加工 成 一个 最大 的 正方体 ， 这个 正方体 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "215", "content": "把 (1/4) 千克 糖 ， 平均 分装 5 袋 ， 每 袋 糖 的 重量 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12425", "content": "小 刚 有 12 本 课外书 ， 相当于 小 丽 课外书 本 数 的 (3/4) ， 这 两 人 一共 有 多少 本 课外书 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19104", "content": "阳光 小学 食堂 为了 学生 营养 午餐 能 吃 好 ， 到 某 超市 买 了 3000 个 鸡蛋 ， 第一 吃 了 这些 鸡蛋 的 (3/5) ， 还 剩 多少 个 鸡蛋 没有 吃 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10225", "content": "快乐 中队 为 准备 新年 晚会 买来 18 盒 巧克力 ， 每盒 6 块 ， 平均 分给 4 个 小队 ， 每个 小队 能 分 到 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4080", "content": "张 叔叔 要 为 公司 买 25 套 工作服 ， 每件 上衣 175 元 ， 每 条 裤子 98 元 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "409", "content": "在 某 汽车 制造厂 的 实验室 里 进行 赛车 实验 ， 甲 、 乙 两辆 赛车 从 相距 200 米 的 轨道 两端 同时 相向 而 行 ， 两车 速度 都 是 每秒 1 米 ． 在 两车 之间 有 一辆 信号 车 ， 以 每秒 5 米 的 速度 从 甲 车 开 向 乙 车 ； 遇到 乙 车 又 返回 开 向 甲 车 … 如此 不停 地 往返 于 甲 、 乙 两 赛车 之间 ． 当 甲 、 乙 两车 相距 10 米 时 ， 信号 车 一共 行 了 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16524", "content": "甲 镇 与 乙 镇 相距 138 千米 ， 张 、 王 二 人 骑 自行车 分别 从 两 镇 同时 出发 ， 相向 而 行 ． 张 每 小时 骑行 13 千米 ， 王 每 小时 骑行 12 千米 ， 王 在 途中 因 修车 耽误 1 小时 ， 然后 继续 行进 ． 两 人 从 出发 到 相遇 经过 几小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2089", "content": "某次 的 数学 竞赛 共有 20 道 题 ， 评分标准 是 ： 每 做 对 一 题 得 5 分 ， 每 做 错 或 不 做 一 题 扣 3 分 ， 小 明 了 这次 数学 竞赛 ， 得 了 68 分 ， 那么 小 明 做 对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9122", "content": "学校 购进 85 套 桌椅 ． 每张 桌子 67 元 ， 每 把 椅子 23 元 ． 学校 购进 这些 桌椅 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16593", "content": "妈妈 买 了 8.5 千克 苹果 ， 每千克 12 元 ． 5 千克 西红柿 ， 每千克 3 元 ． 2.5 千克 萝卜 ， 每千克 1.2 元 ． 4 千克 梨 ， 每千克 4.5 元 ． 妈妈 买 水果 用 去 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10383", "content": "某 年级 有 120 名 同学 参加 数学 竞赛 ， 其中 男同学 有 70 人 ， 他们 的 平均分 比 所有 同学 的 平均分 多 1.5 分 ， 问 女同学 的 平均分 比 所有 同学 的 平均分 低 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1839", "content": "动物园 里 有 33 只 兔子 ， 兔子 的 数量 是 猴子 数量 的 (3/4) ， 猴子 的 数量 是 天鹅 数量 的 (2/3) ． 动物园 里 天鹅 有 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6715", "content": "比 300 少 105 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15650", "content": "甲 、 乙 两个 筑路 队 合 修 4000 米 长 的 一段路 ， 修 了 10 天 ， 还 剩 500 米 ． 已知 甲队 平均 每天 修 160 米 ， 乙 队 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11401", "content": "从 一个 装有 20 个 红球 和 黄 球 的 袋中 ， 每次 摸 出 一个 球 ， 记下 颜色 后 再 放入 袋中 ， 摇匀 再 摸 ， 这样 共 摸 10 次 ， 其中 共 摸 到 黄 球 4 次 ， 请 根据 这 一 情况 ， 计算 袋中 红球 可能 有 多少 个 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17315", "content": "食堂 买来 面粉 850 千克 ， 运 了 5 车 ， 还 剩 100 千克 ， 平均 每 车运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14228", "content": "商店 有 黄 气球 38 人 ， 红 气球 25 个 ， 花 气球 的 个数 比 红 气球 和 黄 气球 总数 的 2 倍 少 9 个 ． 花 气球 有 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5061", "content": "多少 吨 的 (1/8) 和 1 吨 的 (5/8) 同样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5339", "content": "一 条 红 彩带 长 30 米 ， 黄 彩带 比 红 彩带 长 (1/6) ． 黄 彩带 长 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22002", "content": "两个 小队 的 同学 做 纸花 ， 8 人 做 了 72 朵 ． 照 这样 计算 ， 再 增加 10 个人 ， 一共 可以 做 多少 纸花 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14275", "content": "某 服装店 ， 某种 毛衣 140 元 ． 买 7 件 毛衣 的 钱 可以 买 5 件 大衣 ． 每件 大衣 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8111", "content": "一 套 西服 ， 裤子 的 价钱 是 85 元 ， 上衣 的 价钱 比 裤子 贵 0.6 倍 ， 买 一套 这种 西服 共用 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22111", "content": "一 本 字典 定价 18 元 ， 0.8 出售 ， 仍 比 成本价 高 20% ． 这本 字典 的 成本价 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9512", "content": "原 计划 21 天 完成 ， 实际 提前 了 5 天 ， 实际 多少 天 完成 任务 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8391", "content": "常有 药品 “ 碘酒 ” 里 碘 与 酒精 的 比 是 2 ： 25 ， 要 配制 8100 克 碘酒 ， 需要 碘 多少 克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14892", "content": "小 明 看 一 本书 ， 已 看 的 页数 比 总 页数 的 (3/5) 少 12 页 ， 已 看 了 60 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13877", "content": "小 华 从 1 楼 走 到 5 楼 要 1.6 分钟 ， 他 用 同样 的 速度 走 到 12 楼 ， 还要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13845", "content": "一 块 菜地 ， 今年 收 白菜 15 吨 ， 比 去年 增产 20% ， 去年 这块 菜地 收 白菜 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11603", "content": "五年级 图书 角 有 145 本 科普 类书籍 和 一些 故事书 ， 科普 类书籍 的 本 数 比 故事书 的 2 倍 还 少 15 本 ． 五年级 有 故事书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "685", "content": "小 华 家 到 学校 的 路程 是 0.5 km ， 小 芳 家 到 学校 的 路程 比 小 华 家 到 学校 路程 的 3 倍 少 0.2 km ． 两个 各自 从 家 到 学校 ， 小 华 要 比 小 芳 少 走 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17052", "content": "有 面粉 250 千克 ， 大米 比 面粉 多 (1/4) ， 大米 比 面粉 多 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21144", "content": "书店 运 来 一批 书 ， 第一天 卖出 的 比 这 批 书 的 (1/6) 少 10 本 ， 这时 还 剩 (7/8) 没有 卖 ． 这 批 书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13517", "content": "空调 厂 准备 装配 一批 空调 ， 计划 每天 装配 45 台 ， 20 天 完成 ． 实际 18 天 就 完成 了 任务 ， 实际 每天 装配 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15406", "content": "某 施工队 运 水泥 ， 4 次 运 10.4 吨 ． 照 这样 计算 ， 要 运 46.8 吨 水泥 ， 需要 运 多少 次 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5947", "content": "三年级 一班 参加 植树 活动 ， 分成 了 8 个 小组 ， 每个 小组 有 6 人 ． 全班 一共 植树 336 棵 ， 平均 每组 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3701", "content": "一 件 毛衣 按 20% 的 利润 定价 ， 然后 打 0.8 出售 ， 结果 每件 赔 了 10 元 ， 这件 毛衣 进价 多少 钱 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10555", "content": "一 种 小汽车 原来 的 售价 是 15 万元 ， 实际 售价 降低 了 3 万元 ． 实际 售价 是 原价 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20541", "content": "学校 为 学生 校服 ， 上衣 每件 48 元 ， 裤子 每 条 30 元 ， 四年级 有 学生 240 人 ， 这次 做 校服 四年级 共用 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13711", "content": "(5/8) / (1/4) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2039", "content": "学校 运 来 2 立方米 的 黄沙 ， 把 它 铺 在 长 8 米 ， 宽 1.25 米 的 长方形 沙坑 里 ， 能 铺 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15867", "content": "同学 们 参加 植树 劳动 ， 栽 了 432 棵 柏树 ， 栽 的 松树 棵 数 比 柏树 的 2 倍 多 27 棵 ． 栽 松树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10536", "content": "修 一条 路 ， 第一周 修 全长 的 20% ， 第 二 周 修 全长 的 25% ， 第 3 周 修 了 480 米 ， 还 剩 70 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7574", "content": "电视机厂 计划 每天 生产 500 台 电视机 ， 25 天 完成 任务 ， 实际 20 天 就 完成 任务 ， 实际 比 计划 每天 多 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "691", "content": "甲 、 乙 两个 工程队 合 修 一段路 ， 甲队 每天 修 70 米 ， 乙 队 每天 修 85 米 ， 11 天 正好 修 完 ． 甲队 比 乙 队 一共 少 修 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2685", "content": "某项 工程 ， 甲 、 乙 合 做 1 天 可以 完成 全部 工程 的 (5/24) ． 如果 这项 工程 由 甲队 独 做 2 天 ， 再 由 乙 队 独 做 3 天 ， 能 完成 全部 工程 的 (13/24) ． 乙 队 单独 完成 这项 工程 需要 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3043", "content": "某 商品 降价 20% 后 ， 要 想 恢复 原价 ， 则 价格 应 提高 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11143", "content": "一 个 长方形 的 长 是 10 分 米 ， 宽比 长 少 4 分 米 ， 这个 长方形 的 面积 = 多少 平方分米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15687", "content": "375 / 0.25 = （ 用 商 不变 的 性质 写 出来 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6917", "content": "一 个 养禽 专业户 养鸡 980 只 ， 养 的 鸡 比 鸭 的 2 倍 多 20 只 ． 养鸭 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "565", "content": "某 服装店 “ 感恩节 ” 酬宾 ， 服装 一律 0.8 出售 ， 李 阿姨 有 会员卡 还 可以 再 打 0.9 ． 李 阿姨 买 了 一套 150 元 和 一套 230 元 的 服装 ， 只 需要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18668", "content": "同学 们 栽树 ， 四年级 栽 了 58 棵 ， 五年级 栽 的 棵 数 比 四年级 的 3 倍 少 29 棵 ． 五年级 比 四年级 多 栽 多少 棵 ？ （ 用 综合 算式 计算 ）", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7920", "content": "20.01 * 314 + 200.1 * 31.4 + 2001 * 3.14 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "7521", "content": "一 种 微波炉 售价 360 元 ， 比 原来 降价 20% ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9184", "content": "老 寨 小学 三年级 一共 有 5 个 班 ， 其中 3 （ 1 ） 班 有 48 人 ， 其余 各 班 都 有 46 人 ， 老 寨 小学 三年级 一共 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8065", "content": "四年级 的 同学 为了 迎接 新年 ， 准备 制作 180 朵 大红花 来 美化 教室 ， 他们 平均 每 小时 做 42 朵 ， 做 了 4 小时 后 ， 还 需要 做 多少 朵 大红花 才能 完成 任务 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13838", "content": "某 水泥厂 计划 生产 水泥 48 万吨 ， 实际 生产 了 57.6 万吨 ， 完成 计划 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11424", "content": "一 支 铅笔 比 一块 橡皮 贵 7 分 ， 一支 园珠笔 可 买 11 支 铅笔 ， 已知 一块 橡皮 8 分 ， 一支 园珠笔 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9897", "content": "甲 、 乙 两 人 绕 周长 1200 米 的 环形 广场 竞走 ， 已知 甲 每分钟 走 80 米 ， 乙 的 速度 是 甲 的 2 倍 ． 现在 甲 在 乙 后面 240 米 ， 乙 追 上 甲 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19761", "content": "一 件 衣服 打 0.8 后 售价 比 原价 便宜 了 60 元 ， 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19284", "content": "一 个 长 50 cm ， 宽 40 cm ， 高 35 cm 的 鱼缸 水深 25 cm ， 放入 2 条 金鱼 后 水面 上升 到 25.5 cm ， 每 条 金鱼 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6069", "content": "畜牧场 养牛 400 头 ， 羊 的 只 数 是 牛 的 (7/8) ， 是 马 的 (7/10) ， 畜牧场 养 马 多少 匹 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "180", "content": "某 厂 男 职工 是 女职工 的 (7/13) ， 女职工 占 全厂 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22598", "content": "某 化肥厂 7 天 可以 生产 630 吨 化肥 ， 照 这样 计算 ， 一 昼夜 生产 化肥 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "729", "content": "小 亮 去 公园 ， 全程 的 (1/3) 骑 自行车 ， 剩下 的 路程 的 (4/5) 坐 汽车 ， 下 汽车 后 余下 的 路程 步行 ， 求 步行 的 路程 占 全程 的 几分 之 几 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3993", "content": "一 辆 轿车 从 甲地 到 乙地 ， 3 小时 行驶 了 240 千米 ， 照 这样 的 速度 ， 去 乙地 还 需 2 小时 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "412", "content": "两架 飞机 分别 从 南沙群岛 和 广州 相对 飞 出 ， 2 小时 后 在 离 中 点 200 千米 处 相遇 ， 已知 慢 飞机 每 小时 400 千米 ， 求快 飞机 的 速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17597", "content": "小 明 看 一 本书 ， 第一天 看 了 35 页 ， 第 二 天 看 的 相当于 第一天 的 (5/7) ， 两天 共 看 了 这 本书 的 (1/4) ． 这 本书 共 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8654", "content": "四川 卧龙自然保护区 有 一只 大熊猫 的 体重 是 104.4 千克 ， 一只 小熊猫 体重 是 7.2 千克 ． 大熊猫 的 体重 是 小熊猫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1004", "content": "学校食堂 运进 大米 20 袋 ， 每 袋 大米 90 千克 ， 运进 面粉 500 千克 ． 运进 的 大米 比 面粉 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1992", "content": "甲 、 乙 两地 相距 380 千米 ， 客车 和 货车 分别 从 两地 相对 开出 ， 3 小时 后 还 相距 20 千米 ， 客车 每 小时 行驶 70 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2769", "content": "同乐 小学 食堂 存 煤 3000 千克 ， 原 计划 25 天 烧 完 ， 实际 每天 比 原 计划 节约 45 千克 ． 实际 多少 天 烧 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11512", "content": "甲乙 两 港口 相距 612 千米 ， 轮船 从 甲 港口 驶 到 乙 港口 用 18 小时 ， 回来 时 每 小时 加快 2 千米 ， 问 回来 要 用 几小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6876", "content": "修 一条 公路 ， 上 半月 修 了 全长 的 40% ， 下半月 比 上 半月 多 修 了 800 米 ， 正好 修 完 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7318", "content": "3 个 同学 跳绳 ． 小强 跳 了 120 下 ， 小 明 跳 的 是 小强 的 (5/8) ， 小 伟 跳 的 是 小 明 的 (2/3) ． 小 伟 跳 了 多少 下 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22363", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相对 开出 ， 3 小时 相遇 ． 甲 车 每 小时 行 50 千米 ， 比 乙 车 的 速度 快 25% ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12559", "content": "工程队 修 一条 路 ， 第一周 修 了 200 米 ， 第 二 周 修 了 150 米 ， 这时 还 剩 全长 的 65% 没有 修 ． 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5308", "content": "小 方 看 一本 故事书 ， 看 了 64 页 ， 还有 28 页 没有 看 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13453", "content": "一 个 因数 是 35 ， 另 一个 因数 是 86 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18283", "content": "小 力 ： 我 买 4 个 小 足球 ； 营业员 阿姨 ： 收 你 100 元 ， 找 你 28 元 ； 平均 每个 小 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8841", "content": "3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "6206", "content": "甲 、 乙 两 数 的 和 是 21 ， 甲 数 是 18.2 ， 乙 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1261", "content": "小 红 买 一顶 帽子 和 一件 上衣 ， 帽子 的 价钱 是 15 元 ， 上衣 的 价钱 是 帽子 的 5 倍 ． 她 买 的 上衣 比 帽子 贵 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13267", "content": "比 400 的 15 倍 多 1400 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1292", "content": "学校 买 4 个 足球 用 去 72 元 ， 一个 篮球 的 价钱 比 一个 足球 贵 8 元 ． 一个 篮球 的 价钱 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10091", "content": "图书馆 买来 一批 新书 ， 分给 一年级 小朋友 (2/5) ， 剩下 的 30 本 全部 给 了 二年级 ， 这 批 新书 一共 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3486", "content": "用 3 台 拖拉机 4 小时 可耕地 1500 公亩 ， 用 同样 的 拖拉机 5 台 耕地 2000 公亩 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8649", "content": "同学 们 栽树 ， 栽 杨树 78 棵 ， 栽 的 柳树 是 杨树 棵 数 的 12 倍 ， 同学 们 一共 栽 了 多少 棵 树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8820", "content": "有 一根 细线 ， 第一次 用 去 (3/5) 米 ， 第 二 次 用 去 (7/10) 米 ， 还 剩下 (3/8) 米 ， 这根 细线 用 去 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22483", "content": "商店 有 彩电 45 台 ， 冰箱 比 彩电 的 10 倍 还 多 21 台 ． 商店 有 冰箱 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1920", "content": "光明 小学 五年级 有 学生 209 人 ， 比 六年级 学生 人数 多 (2/9) ， 六年级 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10458", "content": "学校 开展 植树 活动 ， 计划 植树 500 棵 ， 实际 植树 600 棵 ， 超出 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10694", "content": "某 县城 到 省城 的 高速公路 长 320 千米 ， 普通 公路 长 450 千米 ． 一辆 汽车 走 高速公路 的 速度 是 80 千米 / 时 ， 走 普通 公路 的 速度 是 50 千米 / 时 ， 从 县城 到 省城 走 高速公路 比 走 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7794", "content": "汽车 从 甲地 去 乙地 ， 去 的 时候 下坡 多 ， 平均 每 小时 行 80 千米 ， 用 了 6 小时 到达 ， 回来 时 上坡 多 ， 用 了 8 小时 才 到 ． 回来 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4243", "content": "比 24 千克 多 (1/4) = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15993", "content": "小 英 每月 平均 看电视 36 小时 ， 其中 新闻联播 占 (1/2) ， 少儿 节目 占 (1/3) ， 小 英 每月 看 新闻联播 和 少儿 节目 共用 多少 小时 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7218", "content": "小 明 看 一 本书 ， 如果 每天 看 18 页 ， 15 天 看 完 ． 如果 10 天 看 完 这 本书 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16829", "content": "一 头 大象 重 4.8 吨 ， 比 一头 牛 的 体重 多 4.3 吨 ， 一头 牛 重 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11272", "content": "21 + 201 + 2001 + 20001 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12709", "content": "贝 贝 的 钱 买 一本 5.9 元 笔记本 差 0.6 元 ， 他 买 一本 4.8 元 的 ， 剩下 的 钱 正好 买 一只 圆珠笔 ， 这 只 圆珠笔 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12209", "content": "修 一条 水渠 ， 已经 修好 480 米 ， 剩下 的 一段 比 修好 的 2 倍 少 96 米 ． 剩下 水渠 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21285", "content": "小淘气 看 一本 科技 书 ， 第一天 看 了 全书 的 (1/7) ， 第 二 天 看 了 42 页 ， 这时 看 了 的 页数 与 剩下 的 页数 比 是 2 ： 5 ， 这本 科技 书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16970", "content": "一 个 班 有 42 名 学生 ， 其中 男生 有 24 人 ， 女生 占 全班 人数 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12627", "content": "有 42 棵 杨树 ， 杉树 是 杨树 的 3 倍 ， 柳树 比 它们 的 总数 少 28 棵 ， 柳树 有 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17787", "content": "小 李 驾驶 一辆 货车 到 相距 13.5 千米 处 的 水果 批发市场 运 水果 ． 货车 行驶 6 千米 共用 去 0.4 升 汽油 ． 照 这样 计算 ， 小 李 驾驶 的 这辆 货车 到达 水果 批发市场 还 需要 多少 升 汽油 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21119", "content": "一 件 商品 ， 降价 20% 后 售价 是 320 元 ， 这件 商品 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3358", "content": "一 个数 的 (1/4) 是 5 ， 这个 数 的 35% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11951", "content": "一 种 手机 原价 3600 元 ， 现在 打 0.9 出售 ， 这种 手机 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16012", "content": "100 位 旅游者 中 ， 70 人 懂 中文 ， 52 人 懂 英文 ， 还有 10 人 两种 语言 都 不 懂 ． 问 只 懂 中文 不 懂 英文 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3695", "content": "以 正方形 的 任何 一条 边长 为 半径 画 一个 圆 ， 已知 正方形 的 面积 为 5 平方厘米 ， 那么 这个 圆 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22257", "content": "一 辆 快车 和 一辆 慢车 从 甲地 到 乙地 所用 的 时间 比 是 3 ： 5 ， 现在 快车 和 慢车 分别 同时 从 两地 相向 而 行 ， 经过 2 时 相遇 ． 已知 慢车 每 小时 行 60 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8542", "content": "“ 百家姓 ” 广场 周围 要 栽 一批 水杉 树苗 ， 这 批 树苗 的 成活率 是 75% ～ 80% ． 栽 1000 棵 树苗 ， 至少 能 保证 成活 多少 棵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11533", "content": "一 堆 煤 ， 第一次 用 去 (1/5) ， 第 二 次 用 去 (2/5) 吨 ， 两次 正好 用 去 1 吨 ， 这 堆 煤 原有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9074", "content": "在 一个 集装箱 内 装有 20 吨 货物 ， 货物 总量 的 (5/12) 是 服装 ． 在 服装类 货物 中 成年 装 又 占 了 (3/8) ． 这个 集装箱 装运 的 成年 装有 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9079", "content": "0.2010 * 0.20112011 - 0.2011 * 0.20102010 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4780", "content": "一 块 菜地 (7/8) 公顷 ， 它 的 (1/3) 种 青菜 ， 它 的 (1/2) 种 菠菜 ， 其余 的 种 萝卜 ， 种 萝卜 的 占 这块 地 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12191", "content": "a 、 b 两地 相距 915 千米 ， 甲 火车 从 a 地 开往 b 地 ， 3 小时 后 乙 火车 从 b 地 开往 a 地 ， 已知 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 70 千米 ． 乙 车 开出 几小时 后 与 甲 车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14829", "content": "一 个 三角形 面积 是 48 cm ^ 2 ， 高 是 8 cm ， 则 所 对应 的 底 = 多少 cm ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9577", "content": "某 数 的 (1/4) + 2.5 与 它 的 (1/3) 相等 ， 求 某 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20741", "content": "要 修 一条 长 370.8 千米 的 公路 ， 两队 合 修 要 36 天 修 完 ， 如果 甲队 每天 修 3.6 千米 ， 乙 队 每天 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6600", "content": "一 根 木头 长 12 米 ， 要 把 它 平均 锯 成 4 段 ， 每 锯 一段 需要 3 分钟 ， 锯 完 这根 木头 一共 要 用 多少 分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9990", "content": "秦 老师 一个 朋友 月工资 是 4950 元 ， 按照 个人 具 所得税 的 规定 ， 超 3500 元 部分 ， 要 按照 3% 的 税率 来 缴纳 个人所得税 ， 那么 我 的 朋友 月工资 应 缴纳 所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22033", "content": "一 辆 油罐车 装满 了 油 ， 连 车 重 10 吨 ， 用 去 一半 油 后 连 车 重 6 吨 ， 这辆 空车 重 多少 吨 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "395", "content": "打 某地 电话 每次 至少 要 交费 0.8 元 ． 如果 超过 3 分钟 ， 每 超过 1 分钟 再 交 0.3 元 ． 小 明 打 一次 到 某地 的 电话 ， 交费 2.9 元 ， 他 打 了 几分钟 的 电话 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16783", "content": "有 4 个 方块 里 育种 了 肥 团 玉米 苗 ， 每个 方块 里 有 216 个 肥 团 玉米 苗 ， 共 大约 育种 了 多少 个 肥 团 玉米 苗 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19299", "content": "商店 运 来 钢笔 120 盒 ， 运 来 的 圆珠笔 比 钢笔 多 40% ， 钢笔 和 圆珠笔 共运 来 多少 盒 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6687", "content": "电信局 计划 用 15 天 时间 ， 每天 为 用户 安装 360 门 电话 ． 为了 让 用户 早日 用 上 电话 ， 电信局 只用 12 天 时间 就 完成 了 任务 ． 平均 每天 安装 多少 门 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17755", "content": "解放 小学 六年级 有 女生 120 人 ， 比 男生 少 (2/3) ． 解放 小学 六年级 共有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7596", "content": "辆 汽车 从 都江堰 开往 重庆 ， 第一 小时 行 了 全程 的 25% ， 第 二 小时 行 了 30% ， 这时 离 重庆 还有 135 千米 ． 求 都江堰 与 重庆 之间 的 距离 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4940", "content": "医院 有 男同志 200 人 ， 女 同志 168 人 ， 已经 检查 身体 的 有 316 人 ， 没有 检查 身体 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9411", "content": "一 根 9 米 长 的 绳子 ， 剪 了 2 次 ， 平均 每 段长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12862", "content": "某 工厂 运 来 184 吨 煤 ， 前 8 天 平均 每天 用 去 15 吨 ． 剩下 的 预计 4 天 用 完 ， 平均 每天 可用 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15876", "content": "学校 买来 198 本 图书 ， 打算 平均 分给 全校 6 个 年级 ， 每个 年级 有 3 个 班 ． 平均 每班 分 得 多少 本 图书 ﹖", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12963", "content": "学校 购进 一批 粉笔 ， 每箱 36 盒 ， 学校 买 了 12 箱 零 20 盒 ． 这些 粉笔 一共 有 多少 盒 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5132", "content": "王 大伯 在 一块 地里 培育 了 56 行 松树 苗 和 44 行 柏树 苗 ， 每行 46 棵 ， 王 大伯 培育 的 松树 苗 比 柏树 苗 多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9738", "content": "录音机 现价 340 元 一台 ， 比 原价 降低 60 元 ． 降低 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12429", "content": "学校 教学楼 前 有 一块 480 平方米 的 空地 ． 计划 用 它 的 (1/4) 建 一 喷水池 ， 喷水池 占地 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2592", "content": "快车 和 慢车 同时 从 甲 、 乙 两地 相向 而 行 ， 快车 每 小时 行 40 千米 ， 经过 3 小时 ， 快车 已 驶过 中 点 25 千米 ， 这时 快车 与 慢车 还 相距 7 千米 ． 慢车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20912", "content": "牧场 有 牛 125 头 ， 羊 的 只 数 比 牛 的 3 倍 少 15 只 ． 牧场 共 养牛 、 羊 多少 只 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8392", "content": "某 修路 队 修 一条 公路 ， 9 天 修 了 720 米 ． 照 这样 计算 ， 再 修 6 天 ， 一共 可以 修 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12298", "content": "李 春 家 买 了 一台 电脑 和 一台 电冰箱 ， 一共 花 了 6000 元 ， 电冰箱 的 价钱 是 电脑 的 (1/3) ． 电脑 的 价钱 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10982", "content": "王老师 把 5000 元 的 稿费 存入 银行 ， 存期 为 2 年 ， 年利率 为 2.79% ， 到期 支取 时 ， 王老师 可 获得 本息 一共 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11614", "content": "人 在 火星 上 的 体重 是 地球 上 的 (3/8) ， 小 华 在 地球 上 的 体重 是 40 千克 ， 如果 在 火星 上 ， 小 华 的 体重 是 多千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5878", "content": "一 辆 货车 和 一辆 客车 同时 从 相距 135 千米 的 两地 相向 而 行 ， 经过 1.5 小时 相遇 ， 已知 货车 和 客车 速度 的 比 是 7 ： 8 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6196", "content": "甲 数 是 乙 数 的 多少 ， 乙 数 是 甲 数 的 2 倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12252", "content": "在 一块 直径 为 40 米 的 圆形 操场 周围 栽树 ， 每隔 6.28 米 栽 一棵 ， 一共 可 栽 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3851", "content": "妈妈 买 了 4 个 玻璃杯 ， 共 付 了 12 元 ， 找回 4.8 元 ， 每个 玻璃杯 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13481", "content": "被减数 是 15 ， 减数 是 10 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "403", "content": "高新 一中 初中 校区 7 年级 同学 开展 “ 跳蚤市场 ” 活动 ． 一位 同学 叫卖 一件 玩具 ， 第一次 叫价 ， 没 人 来 买 ； 第 二 次 喊价 ， 他 将 第一次 的 叫价 打 了 0.9 ， 仍 没 人 买 ； 他 只好 再 降价 1.2 元 ， 终于 售出 ． 已知 出售 的 价格 恰好 是 第一次 叫价 的 66% ． 这位 同学 第一次 给 这件 玩具 叫价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19281", "content": "一 辆 大卡车 0.6 小时 行 了 27 千米 ， 另 一辆 小汽车 的 速度 是 它 的 1.2 倍 ， 小汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20455", "content": "三年级 的 同学 去 春游 ， 每 条 船 坐 10 人 ， 正好 坐满 8 条 船 ． 如果 每 条 船只 坐 5 人 ， 需要 准备 多少 条 船 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10519", "content": "小 明 和 妈妈 到 邮局 给 奶奶 寄 了 2000 元 ． 汇费 是 1% ． 汇费 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18219", "content": "快车 每 小时 行 50 千米 ， 慢车 每 小时 行 40 千米 ， 慢车 先 出发 2 小时 ， 快车 才 从 另 一 地方 相对 而 行 ， 3 小时 两车 相遇 ． 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "1669", "content": "一 台 彩电 现价 是 3600 元 ， 比 原价 便宜 20% ， 这 台 彩电 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14802", "content": "有 一个 仓库 ， 从 里面 量 得 长 25 米 ， 宽 10 米 ， 存货 高度 为 3 米 ， 这个 仓库 最 多 能 存放 货物 多少 立方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14673", "content": "李 华 买 了 一辆 12 万元 的 汽车 ， 按规定 买 汽车 要 缴 10% 的 购置税 ． 他 买 的 这辆 汽车 一共 要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2197", "content": "从 甲地 到 乙地 共 738 千米 ， 一辆 汽车 3 小时 行 了 246 千米 ． 照 这样 计算 ， 这辆 汽车 还要 行 几小时 才能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8384", "content": "李老师 看 一 本书 ， 第一天 看 了 全书 的 20% ， 第 二 天 看 了 全书 的 25% ， 还 剩下 88 页 没有 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2199", "content": "李 明 在 书店 买 了 两本书 ． 一本 19.5 元 ， 另 一本 21.8 元 ． 他 付出 50 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16955", "content": "哥哥 给 了 弟弟 3 个 苹果 后 还 剩下 8 个 ， 这时 两 人 苹果 一样 多 ， 弟弟 原来 有 苹果 多少 个 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3867", "content": "93 * 4 - 58 得 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7365", "content": "甲乙 两车 从 相距 126 千米 的 两地 同时 同 向 而 行 ， 甲 车 在 前 ， 每 小时 行驶 43 千米 ； 乙 车 在 后 ， 每 小时 行驶 61 千米 ， 乙 车 追 上 甲 车 需要 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7623", "content": "我们 学校 六年级 有 120 人 ， 是 五年级 的 (2/3) ， 而 四年级 的 人数 是 五年级 的 (5/6) ， 求 四年级 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18474", "content": "林场 今年 植 松树 540 棵 ， 比 去年 多 植 (1/5) ． 林场 去年 植 松树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19972", "content": "黄 老师 一分钟 步行 可以 走 0.09 千米 ， 照 这样 计算 ， 山 高 小学 离 黄 老师 家 有 2.88 千米 远 ， 黄 老师 要 从 学校 步行 回家 ， 需要 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11810", "content": "甲 仓 存有 粮食 38 吨 ， 从 乙 仓 运走 18 吨 粮食 后 ， 甲 仓 的 存粮 是 乙 仓 存粮 的 2 倍 ． 乙 仓 原有 粮食 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4859", "content": "西藏 某 牧民 家养 牦牛 125 头 ， 西部 大 开发 后 ， 养 的 牦牛 头数 比 原来 的 2 倍 还 多 36 头 ， 现在 养 牦牛 多少 头 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9241", "content": "一 个 建筑工地 运 一批 水泥 ， 第一次 运 了 50 吨 ， 第 二 次 运 了 70 吨 ， 两次 正好 运 了 这 批 水泥 的 (1/4) ， 这 批 水泥 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12457", "content": "一 根 竹竿 露出 水面 2 米 ， 泥 中 部分 占 全长 的 (2/5) ， 水中 部分 比 泥 中 部分 多 1 米 ， 这根 竹竿 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12895", "content": "一 根 钢管 ， 锯 成 8 段 ， 每 锯 一次 要 3 分钟 ， 共 需 几分钟 锯 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13694", "content": "小 王 、 小张 、 小 李 共 得 1800 元 的 劳务费 ． 小 王 得 600 元 ， 小张 与 小 李 所得 劳务费 的 比 是 3 ： 5 ． 小 李 的 劳务费 = 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4407", "content": "一 桶 油 重 20 千克 ， 用 去 了 (2/5) ， 用 去 了 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "509", "content": "一 座 大桥 长 3800 米 ， 一列 火车 通过 大桥 时 每分钟 800 米 ， 从 车 头上 桥 到 车尾 离 桥 共用 5 分钟 ， 这 列 火车 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2504", "content": "一 本书 共有 420 页 ， 第一天 看 了 115 页 ， 第 二 天 看 了 89 页 ， 还 剩 几页 没有 看 完 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17240", "content": "教室 原有 67 名 同学 ， 男生 出去 了 (1/5) ， 女生 出去 5 人 ， 剩下 的 女生 比 男生 少 1 人 ， 教室 里 原有 女生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12825", "content": "计划 烧煤 15 吨 ， 实际 烧煤 13 吨 ， 节约 用 煤 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16522", "content": "赵本山 是 小 沈阳 的 师傅 ， 他 去年 52 岁 ， 比 小 沈阳 去年 的 年龄 多 (6/7) ， 小 沈阳 去年 多少岁 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5656", "content": "小 红 的 爸爸 在 法国 工作 ， 最近 寄 回家 5000 欧元 ， 要 到 银行 兑换 人民币 ， 能 换 多少 元 ？ （ 1 欧元 兑换 人民币 10.07 元 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14310", "content": "李 叔叔 在 一块 正方形 菜地 的 4 周围 篱笆 ， 每隔 3 米 打 一根 木桩 ， 一共 打 了 20 根 木桩 ， 这个 正方形 的 边长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18331", "content": "要 在 一个 长 5 dm ， 宽 3 dm ， 高 2 dm 的 长方体 商品 盒 的 4 周 贴 一圈 商标纸 ， 至少 需要 多少 平方分米 的 商标纸 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9152", "content": "食堂 7 天 正好 用 去 2 瓶 花生油 ， 共 6 千克 ． 平均 每天 用 花生油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17288", "content": "路边 栽 了 一些 树 ， 相邻 两棵树 之间 的 距离 为 10 米 ， 小 青 从 第 1 棵 树 跑 到 第 22 棵 树 ， 他 一共 跑 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16860", "content": "含盐 13% 的 盐水 100 克 ， 加入 多少 克 水 就 变成 含盐 10% 的 盐水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22283", "content": "甲乙 两 数 的 比 是 3 ： 5 ， 两 数 的 差 是 12 ， 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16071", "content": "一 桶 油 用 了 25 千克 ， 正好 用 了 (1/4) ， 如果 把 剩下 的 分装 成 (3/8) 千克 的 小瓶 ， 可以 装 多少 瓶 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "23153", "content": "某 商场 开展 促销 活动 ， 全场 0.75 销售 ， 妈妈 买 了 一件 原价 200 元 的 上衣 ， 可以 少付 多少 元 钱 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2670", "content": "某次 数学 竞赛 共有 20 条 题目 ， 每 答对 一 题 得 5 分 ， 错 了 一 题 不仅 不 得分 ， 而且 还要 倒扣 2 分 ， 这次 竞赛 小 明 得 了 86 分 ， 问 ： 他 答对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3886", "content": "一 辆 汽车 行 8 千米 消耗 汽油 (4/5) 升 ， 平均 每 千米 耗 汽油 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20423", "content": "“ 6 一节 ” 某 商店 玩具 一律 按 0.7 出售 ， 小 明 买 了 一辆 玩具 汽车 ， 原价 60 元 ， 现在 只 需 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20627", "content": "在 一幅 条形 统计图 中 ， 用 0.8 厘米 表示 200 吨 ， 要 表示 750 吨 的 数量 ， 直 条 应当 画 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21439", "content": "王明 回家 ， 距 家门 300 米 ， 妹妹 和 小狗 一齐 向 他 奔 来 ， 王明 和 妹妹 的 速度 都 是 每分钟 50 米 ， 小狗 的 速度 是 每分钟 200 米 ， 小狗 遇到 王明 后 用 同样 的 速度 不停 往返 于 王明 与 妹妹 之间 ． 当 王明 与 妹妹 相距 10 米 时 ， 小狗 一共 跑 了 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22796", "content": "一 堆 煤 ， 原 计划 每天 烧 9.2 吨 ， 160 天 烧 完 ， 由于 改建 了 炉灶 ， 每天 节约 1.2 吨 ， 这些 煤 可以 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20161", "content": "3.86 * [ 1 / （ 2.1 - 2.09 ） ] + 0.6 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22477", "content": "从 公园 到 动物园 有 4 条 路 ， 从 动物园 到 植物园 有 3 条 路 ， 从 公园 经过 动物园 到 植物园 有 几种 走法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2909", "content": "63 名 男同学 和 45 名 女同学 一起 做 游戏 ． 每 9 人 一组 ， 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3966", "content": "一 个 长方体 容器 ， 底面 长 3 分 米 ， 宽 2 分 米 ， 放入 一个 土豆 后 水面 升高 了 0.1 分 米 ， 这个 土豆 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18007", "content": "光明 造纸厂 生产 一批 新闻纸 ， 原 计划 28 天 完成 ， 每天 需 生产 12.5 吨 ． 实际 提前 3 天 完成 ， 实际 每天 比 原 计划 多 生产 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "321", "content": "基建工 地 有 一批 水泥 ， 第一次 用 去 7 吨 ， 比 第 二 次 多用 去 0.75 吨 ， 还 余下 5.5 吨 ． 这 批 水泥 一共 有 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10284", "content": "蘑菇 收购站 收 蘑菇 ， 要求 含水量 不能 超过 75% ， 源源 家 将 蘑菇 运到 收购站 ， 经检测 ， 质量 为 600 千克 ， 含水量 80% ， 不 合格 ， 源源 家 只好 对 蘑菇 进行 晾晒 ， 当 蘑菇 质量 降 至 多少 千克 时 正好 达到 验收 标准 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11918", "content": "玻璃杯 厂 生产 玻璃杯 858 只 ， 每 6 只 杯子 装 一盒 ． 如果 每盒 卖 7 元 ， 这些 杯子 可以 卖 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4783", "content": "学校 举行 歌咏 比赛 ， 中 高年级 有 146 人 参赛 ， 比 低年级 多 87 人 ． 全校 共有 多少 人 参加 这次 比赛 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17022", "content": "2.4 与 0.48 的 差 乘以 15 ， 所得 的 积 除以 120 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13370", "content": "有 300 千克 苹果 需要 装箱 ， 已经 装 了 8 箱 ， 每箱 35 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23137", "content": "木箱 里 装有 红色 球 3 个 、 黄色 球 5 个 、 蓝色 球 7 个 ， 若 蒙眼 去 摸 ， 为 保证 取出 的 球 中 有 两个 球 的 颜色 相同 ， 则 最少 要 取出 多少 个 球 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "23151", "content": "装订 小组 要 装订 1680 本书 ， 计划 每 小时 装订 80 本 ， 如果 要 提前 5 小时 完成 任务 ， 那么 每 小时 要 装订 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2840", "content": "李老师 买 数学 参考书 用 了 24.28 元 ， 买 语文 参考书 用 了 23.76 元 ， 他 付给 售货员 50 元 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22080", "content": "参加 美术组 的 有 24 人 ． 数学 小组 的 人数 是 美术 小组 的 2 倍 ， 数学 小组 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22036", "content": "一 列 客车 以 每 小时 行 80 千米 的 速度 从 甲 站 开往 乙 站 ， 同时 有 一列 货车 以 每 小时 60 千米 的 速度 从 乙 站 开往 甲 站 ， 经过 3.5 小时 两车 相遇 ． 甲乙 两站 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8828", "content": "一 本 故事书 ， 笑笑 已 看 了 全部 的 (3/8) ， 还 剩下 全书 的 多少 没有 看 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12839", "content": "中兴 汽车 制造厂 去年 生产总值 为 6.9 亿元 ， 比 计划 超额 了 15% ， 该厂 去年 计划 生产总值 多少 亿元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19493", "content": "学校 舞蹈 组 与 美术组 共 72 人 ． 其中 美术组 的 人数 是 舞蹈 组 的 (4/5) ， 舞蹈 组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9737", "content": "梨树 棵 数 比 苹果树 的 棵 数 少 30% ， 那么 梨树 棵 数 是 苹果树 的 多少 % ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8193", "content": "制作 一个 底面 直径 20 厘米 ， 长 50 厘米 的 圆柱形 通风管 ， 至少 需要 铁皮 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14718", "content": "小乐 爷爷 今年 的 年龄 数 减去 15 后 ， 除以 4 ， 再 减去 6 之后 ， 乘以 10 ， 恰好 是 100 ． 问 ： 小乐 爷爷 今年 多少岁 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10907", "content": "姐姐 和 妹妹 都 从 家 到 学校 上学 ， 姐姐 每分钟 走 55 米 ， 妹妹 每分钟 走 40 米 ， 姐姐 让 妹妹 先 走 3 分钟 ， 然后 姐姐 才 出发 追赶 妹妹 ， 经过 多少 分钟 姐姐 可以 追 上 妹妹 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10313", "content": "一 段 木料 锯 了 3 次 ， 一 共用 了 6 分钟 ， 像 这样 如果 要 锯 成 5 段 ， 那么 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21919", "content": "25 个 0.6 连 加 的 和 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16699", "content": "一 个数 的 (5/9) 是 20 ， 则 这个 数 的 (3/10) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21310", "content": "一 个 水箱 中 的 水 是 装满 时 的 (5/6) ， 用 去 20 升水 后 ， 剩余 的 水 是 装满 时 的 (3/4) ， 求 这个 水箱 的 容积 = 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2850", "content": "把 5 克 盐 溶化 在 100 克 水中 ， 盐 占 盐水 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11230", "content": "一 只 鸟 一天 吃 70 只 害虫 ， 照 这样 计算 ， 5 只 鸟 6 天 吃 多少 只 害虫 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7671", "content": "一 种 商品 降价 15% 后 价格 是 1700 元 ． 这种 商品 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18135", "content": "学校 预订 下 个 学期 的 课本 ， 发给 36 个 班 ． 每班 48 个 同学 ， 再 留出 60 本 备用 ， 一共 预订 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13875", "content": "一 个 圆锥形 零件 的 底 面积 是 30 平方厘米 ， 高 是 4 厘米 ， 与 它 等 底 等 高 的 圆 拄 形 零件 的 体积 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4662", "content": "某 食堂 十 月份 买 面粉 用 去 982.4 元 ， 比 买 大米 多用 去 506.23 元 ． 买 大米 用 去 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12139", "content": "一 种 药片 每次 吃 (1/4) 片 ， 每天 吃 3 次 ， 一盒 药片 共 24 片 ， 则 这 盒 药 共 可以 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7303", "content": "小 明 读 一本 故事书 ， 第一天 读 了 24 页 ， 占 全书 的 (1/3) ， 第 二 天 读 了 全书 的 37.5% ， 还 剩 多少 页 没有 读 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3884", "content": "小 红 体重 42 千克 ， 小 云 体重 40 千克 ， 小 新 的 体重 是 两 人 体重 的 (1/2) ． 小 新 体重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18354", "content": "从 甲 城市 到 乙 城市 ， 快车 每 小时 行 80 千米 ， 3 小时 可以 到达 ． 慢车 要 多用 1 小时 才能 到达 ． 慢车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8127", "content": "一 块 近似 平行四边形 的 菜地 ， 底 是 24 m ， 高 是 15 m ， 今年 一共 收获 了 1800 kg 蔬菜 ， 平均 每平方米 收获 多少 千克 蔬菜 ？ （ 可用 计算器 计算 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6433", "content": "有 320 盆 菊花 ， 排成 8 行 ， 每行 中 相邻 两盆 菊花 之间 相距 1 米 ， 每行 菊花 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18049", "content": "前 元 小学 新建 一幢 教学楼 ， 实际 投资 120 万元 ， 比 原 计划 节省 了 5 万元 ． 节省 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7978", "content": "25 + 45 / 5 的 商 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22661", "content": "某 商场 将 一种 商品 按 标价 的 0.9 售出 ， 仍 可 获 利润 10% ． 若 此 商品 的 标价 为 33 元 ， 那么 该 商品 的 进货价 为 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15327", "content": "一 堆 稻草 有 120 kg ， 已经 吃 了 45% ， 还 剩 多少 kg 没 吃 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21594", "content": "一 个 养禽 专业户 ， 养 鹅 的 只 数 是 鸭 的 (2/3) ， 同时 又 是 鸡 的 (3/4) ， 这个 专业户 养鸭 54 只 ， 养鸡 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10180", "content": "学校 图书馆 去年 有 图书 2800 册 ， 今年 图书 册数 比 去年 增加 了 12% ， 今年 比 去年 增加 了 多少 册 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20644", "content": "新华书店 运 来 1275 本 《 新华字典 》 ， 卖 25 天 后 ， 还 剩下 150 夲 ， 平均 每天 卖出 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "875", "content": "侦察员 小 王 扣押 了 5 包 盗版 影碟 ， 每包 有 4 捆 ， 每 捆 有 20 张 ， 共 扣押 了 多少 张 光碟 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12710", "content": "我们 班 有 35 人 订 了 《 数学 一 国 》 ， 有 18 人 订 了 《 作文 天地 》 ， 其中 有 9 人 两种 杂志 都 订 了 ， 我们 班 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21492", "content": "王 大伯 去年 收 6 袋 高粱 ， 共 重 330 千克 ， 收 9 袋 玉米 ， 共 重 720 千克 ． 平均 每 袋 玉米 比 每 袋 高梁 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1017", "content": "家电 下乡 计划 中 ， 农民 凡 购买 任意 一款 家电 ， 可 享受 政府 13% 的 补贴 ， 奶奶 买 了 一台 彩电 节省 了 325 元 ， 这 台 彩电 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18686", "content": "60 吨 比 多少 吨 多 20%", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10052", "content": "一 个 圆柱 的 底面 直径 是 8 cm ， 高 是 10 cm ， 它 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2022", "content": "水果店 有 90 筐 苹果 和 80 筐 梨 ， 苹果 共 重 1800 千克 ， 今天上午 卖出 苹果 总量 的 (1/5) ， 剩下 苹果 的 重量 是 梨 重量 的 (3/5) ， 水果店 有 梨 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9727", "content": "小 明 每分钟 步行 42 米 ， 小 刚 每分钟 步行 36 米 ， 照 这 速度 ， 两 人 同时 沿 跑道 走 ， 5 分钟 后 ， 小 刚 落后 小 明 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2082", "content": "8 中 有 多少 个 (1/10) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11087", "content": "在 争创 “ 文明城市 ” 活动 期间 ， 记者 对 100 位 市民 做 了 “ 你 曾经 是否 闯 过 红灯 ” 的 调查 ． 结果 只有 23 人 表示 未 闯 过 红灯 ． 在 这次 调查 中 ， 表示 曾 闯 过 红灯 的 人数 占 总 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14765", "content": "学校 购 科技 书 350 本 ， 恰好 是 故事书 的 (2/3) ， 故事书 相当于 连环画 的 (7/4) ， 学校 有 连环画 多少 本 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22801", "content": "一 根 钢管 ， 用 去 它 的 (2/5) 后 还 余 6 米 ， 这根 钢管 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21056", "content": "商店 原来 有 一批 肥皂 ， 卖出 (2/3) 后 又 运进 150 条 ， 这时 和 原来 的 肥皂 同样 多 ． 原来 有 肥皂 多少 条 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7495", "content": "25 * 103 与 87 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6821", "content": "一 根 绳子 长 是 (6/8) 米 ， 比 另 一根 长 (1/8) 米 ， 另 一根 绳子 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3837", "content": "服装厂 做 校服 ． 原来 每套 服装 用布 2.2 米 ， 现在 每套 节省 用布 0.2 米 ． 原来 做 800 套 这种 服装 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7883", "content": "一 瓶 汽水 喝 了 (2/5) ， 还 剩下 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8890", "content": "小 明 要 完成 3000 字 的 稿件 打印 ， 已经 打 了 30 分钟 ， 一共 打 了 1800 个 字 ， 剩下 需要 多少 时间 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3957", "content": "5 米 的 (1/7) 和 1 米 的 多少 同样 多 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2235", "content": "打扫 多功能 教师 ， 甲组 同学 (1/3) 小时 可以 打扫 完 ， 乙组 同学 (1/4) 小时 可以 打扫 完 ， 如果 甲 、 乙 合 做 ， 多少 小时 能 打扫 完整 个 教室 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1094", "content": "工厂 原来 每天 制造 机器 零件 1800 个 ， 现在 每天 制造 的 个数 比 原来 少 10% ． 现在 每天 制造 机器 零件 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17058", "content": "丽丽 每天 骑 自行车 上学 ， 她 平均 每分钟 骑 180 米 ， 需要 骑 8 分钟 ， 丽丽 家 离 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9414", "content": "小 明 家养 了 8 只 鸡 ， 共生 蛋 45 只 ， 每 只 母鸡 生 9 个 蛋 ， 这些 鸡 中 有 几只 公鸡 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18310", "content": "新光 小学 书画 班 有 75 人 ， 舞蹈班 有 48 人 ， 书画 班 人数 比 舞蹈班 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3257", "content": "学校 运 来 200 棵 树苗 ， 老师 栽种 了 10% ， 余下 的 按 7 ： 6 ： 5 分配 给 甲 、 乙 、 丙 3 个 班级 ， 丙 班 分 到 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11645", "content": "一 次 数学 竞赛 共 15 道 题 ， 每 做 对 一道 题 得 8 分 ， 做 错 一道 倒扣 4 分 ， 小 明 所有 题 都 做 了 ， 可 只得 了 72 分 ， 他 做 对 了 几道 题 ？ （ 列式 计算 ）", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6154", "content": "一 个 因数 是 58 ， 另 一个 因数 是 80 ， 他们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2662", "content": "甲 、 乙 两 人 绕 周长 1540 米 的 环形 广场 竞走 ， 已知 甲 每分钟 走 160 米 ， 乙 的 速度 是 甲 的 3 倍 ． 现在 甲 在 乙 后面 260 米 ， 乙 追 上 甲 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4155", "content": "小时 有 邮票 180 枚 ， 比 小 立 多 (1/8) ， 小 立 有 多少 枚 邮票 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5886", "content": "黎 老师 打 一篇 论文 已经 打 了 1600 字 ， 正好 是 全文 的 (2/5) ， 还有 多少 字 没有 打 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18986", "content": "甲 奶牛 每天 产 奶 14.8 千克 ， 乙 奶牛 每天 比 甲 奶牛 多产 奶 0.9 千克 ． 两头 奶牛 一天 共产 奶 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17650", "content": "一 本书 有 160 页 ， 小 明 第一天 读 了 全书 的 (3/5) ， 第 二 天 读 了 余下 的 (1/3) ， 还 剩 全书 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15184", "content": "某校 六年级 学生 中 男生 人数 占 52% ， 男生 中 爱 打乒乓球 的 占 80% ， 女生 中 不 爱 打乒乓球 的 占 70% ． 那么 ， 在 该校 全体 六年级 学生 中 ， 爱 打乒乓球 的 学生 占 百分之几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "19936", "content": "红星村 去年 植树 800 棵 ， 比 今年 多 (1/4) ， 今年 比 去年 减少 几分 之 几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14106", "content": "学校食堂 买来 一些 土豆 ， 已经 吃 了 (3/4) ， 还 剩 90 千克 ， 这些 土豆 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8434", "content": "某 粮食 店 购进 大米 和 小米 各 500 千克 ， 大米 批发价 是 2.54 元 / 千克 ， 小米 批发价 是 1.98 元 / 千克 ， 购进 这 批 大米 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9023", "content": "农场 今年 收 小麦 150 万吨 ， 比 去年 增产 20% ， 今年 比 去年 增产 小麦 多少 万吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21", "content": "4 （ 2 ） 班 有 男生 25 人 ， 女生 23 人 ． 体育课 上 ， 周 老师 把 他们 每 8 人 站 一队 ， 一共 可以 站 多少 队 ？ 列 综合 算式 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "427", "content": "育才 小学 有 女生 900 人 ， 男生 人数 比 女生 多 20% ． 这个 学校 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9973", "content": "97 + 198 + 199 + 200 + 201 + 202 + 203 + 204 = ．", "knowledge": ["+"], "difficulty": 0.6, "length": 15}
-{"question_id": "16106", "content": "一 件 衣服 现价 178 元 钱 ， 比 原来 降低 了 121 元 ， 这件 衣服 原价 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8885", "content": "3.6 的 (2/3) + 1.5 / (5/8) 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10362", "content": "一 个数 的 (1/2) 是 5 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3012", "content": "一 个 果园 里 栽 了 125 棵 苹果树 ， 梨树 的 棵 数 比 苹果树 的 4 倍 少 20 棵 ． 这个 果园 一共 栽 了 多少 棵 树 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2005", "content": "把 一个 棱 长 为 12 厘米 的 正方体 钢坯 锻造 成 高 和 宽 都 是 4 厘米 的 长方体 的 钢材 ， 长 = 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11127", "content": "某 食堂 运 来 5500 千克 大米 ， 已经 吃掉 3125 千克 ， 剩下 的 每天 吃 95 千克 ， 还 可以 吃 几天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9407", "content": "运 来 一批 纸 装订 成 练习本 ， 每 本 36 页 ， 可 订 40 本 ， 若 每 本 30 页 ， 可 订 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16133", "content": "已知 两个 因数 的 积 是 12.8 ， 其中 一个 因数 是 2 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3620", "content": "修 一段路 ， 第一天 修 了 全长 的 (3/10) ， 第 二 天 修 了 120 米 ， 还 剩下 全长 的 (2/5) ． 这 段 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20129", "content": "一 台 微波炉 742 元 ， 一台 冰箱 的 价钱 是 一台 微波炉 的 4 倍 ， 一台 冰箱 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7435", "content": "甲 仓 存 大米 120 吨 ， 乙 仓 存 大米 比 甲 仓 多 (1/2) ， 乙 仓 存 大米 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4874", "content": "一 堆 水泥 ， 上午 运 了 (2/7) 吨 ， 下午 运 了 (3/7) 吨 ， 一共 运 了 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15387", "content": "小麦 的 出粉率 为 85% ， 300 千克 小麦 能 磨 出 多少 千克 面粉 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9633", "content": "某村 去年 种植 棉花 10 公顷 ， 今年 比 去年 多 种植 (1/4) ， 今年 多 种植 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9733", "content": "有 两根 棒 ． 一根 长 25 厘米 ， 另 一根 长 93 厘米 ， 用 绳子 将 这 两根 棒 接 起来 ， 接头处 长 5 厘米 ， 接 成 后 的 棒子 长 多少 厘米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9750", "content": "某校 教师 有 120 人 ， 是 学生 人数 的 (1/10) ， 学生 和 教师 共有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16314", "content": "一 种 压路机 的 前轮 是 圆柱 形状 的 ， 轮 宽 为 1.6 米 ， 直径 0.8 米 ． 如果 每分钟 前轮 可 滚动 12 周 ， 那么 每分钟 能 压路 的 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "4119", "content": "（ 2.4 + (2/3) ） * 15 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13799", "content": "火车 的 速度 是 110 千米 / 时 ， 飞机 的 速度 比 火车 速度 的 8 倍 少 20 千米 / 时 ． 求 飞机 的 速度 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12055", "content": "一 辆 汽车 从 甲地 开往 乙地 如果 每 小时 行 75 千米 ， 那么 6 小时 到达 ， 甲乙 两地 间 的 路程 = 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1541", "content": "一 根 木头 长 10 米 ， 要 把 它 平均 分成 5 段 ． 每 锯下 一段 需要 8 分钟 ， 锯 完 一共 要 花 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17572", "content": "制造 1 吨 钢 ， 大约 需要 25 吨 水 ． 一个 小 钢厂 去 年产 钢 985 吨 ， 制造 这些 钢 时 用 去 的 水 有 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13347", "content": "畜牧场 今年 比 去年 多 养牛 120 头 ， 比 去年 多 养 20% ． 这个 畜牧场 去年 养牛 多少 头 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14020", "content": "一 辆 小车 ， 分期付款 要 比 定价 多付 10% ， 一次性 付款 能 打 0.95 ． 小强 的 爸爸 算了 一下 ， 两种 付款 方式 的 差价 是 15000 元 ． 这辆 车 的 定价 = 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6243", "content": "8 个 136 的 和 比 900 多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10062", "content": "207.2 + 389.7 - 157.6 - 109.1 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14366", "content": "1.2 + 1.8 与 4 的 积 ， 除以 0.4 ， 商 是 多么 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21994", "content": "某 考生 参加 若干次 考试 ， 在 最后 一次 考试 时 发现 ： 如果 这次 考试 他 考 95 分 ， 那么 平均 分为 89 分 ， 如果 这次 他 考 79 分 ， 他 平均分 是 87 分 ， 这个 考生 已 参加 了 多少 次 考试 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9745", "content": "3.7 / 1.2 = 3 … 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "304", "content": "糖 和 水 的 比 是 1 ： 9 ， 100 克 糖水 中 含糖 多少 克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13006", "content": "某 乡 今年 修 了 5 条 水渠 ， 总长 5000 米 ， 正好 等于 去年 修 的 4 倍 ， 去年 比 今年 少 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8613", "content": "将 一张 长 5 分 米 ， 宽 3 分 米 的 长方形 纸片 卷 成 一个 圆柱 ， 这个 圆柱 的 侧 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12848", "content": "一 箱 苹果 重 12.3 千克 ， 一箱 梨 比 一箱 苹果 重 2.5 千克 ． 一箱 苹果 和 一箱 梨 共 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10400", "content": "面粉 每千克 6.7 元 ， 大米 每千克 5.5 元 ， 妈妈 买 面粉 和 大米 各 15 千克 ， 一共 要 付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8994", "content": "一 本 故事书 ， 小 玲 第一天 读 了 全书 的 (1/5) ， 第 二 天 读 了 21 页 ， 还有 47 页 没有 读 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18066", "content": "学校 买来 足球 和 排球 各 5 个 ， 买 足球 用 去 115 元 ， 买 排球 用 去 360 元 ． 一个 足球 比 一个 排球 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16368", "content": "一 个数 除以 38 ， 商 是 7 ， 余数 是 23 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17378", "content": "从 a 城 到 b 城 ， (3/4) 是 平 路 ， 其余 是 上坡路 和 下坡路 ． 一辆 汽车 在 a ， b 两城 之间 往返 一趟 ， 共 行驶 20 千米 的 上坡路 ． a ， b 两城 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6597", "content": "一 辆 汽车 2 小时 行驶 130 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 共 驶 3.5 小时 ， 甲 、 乙 两地 间 的 公路 长 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19516", "content": "一 个数 的 (1/5) 比 它 的 (1/4) 少 10 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6364", "content": "除数 是 8 ， 商 是 2 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2844", "content": "某 果园 今年 产 苹果 96 吨 ， 比 去年 增产 20% ， 果园 去 年产 苹果 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8685", "content": "一 个数 除以 7 ， 商 是 23 ， 余数 是 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7735", "content": "(2/3) 与 (1/6) 的 差 的 (7/8) = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14053", "content": "在 35 米 长 的 游泳池 里 ， 甲 和 乙 分别 用 每秒 2 米 和 每秒 1.5 米 的 速度 同时 从 起点 出发 ， 经过 多少 秒 后 ， 甲 游 到 端点 返 游 时 与 乙 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22752", "content": "王师傅 把 一根 长 木料 锯 成 两段 要 2 分钟 ， 他 把 这根 木料 锯 成 8 段 ， 一共 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14518", "content": "英才 学校 有 学生 4200 人 ， 其他 年级 学生 人数 是 六年级 的 7 倍 ， 六年级 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21533", "content": "用 剪刀 将 一根 绳子 剪成 7 段 （ 绳子 不 折叠 ） ， 需要 剪 多少 次 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8377", "content": "王 阿姨 给 她 的 小宝宝 买 衣服 ， 每套 衣服 200 元 ， 裤子 与 上衣 的 价格比 是 3 ： 5 ， 单独 买 这 条 裤子 要 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18625", "content": "一 条 公路 120 米 ， 工人 每天 修 2.4 米 ， 多少 天 可以 修 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13924", "content": "一 辆 汽车 从 甲地 到 乙地 送货 ， 每 小时 行 45 千米 ， (4/3) 小时 送到 ． 返回 时 速度 是 原来 的 (6/5) 倍 ， 几小时 返回 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4145", "content": "90 的 (1/3) 等于 40 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11112", "content": "童心 玩具店 3 天 的 销售额 分别 是 720 元 、 700 元 、 680 元 ， 照 这样 计算 ， 这个 玩具店 30 天 的 销售额 = 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20218", "content": "某 乡 春季 植树 280 棵 ， 比 计划 多 (1/6) ， 比 计划 多 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6231", "content": "某 钢厂 去年 第一季度 与 第 二 季度 分别 销售 钢材 20 吨 和 25 吨 ， 如果 每吨 钢材价格 1600 元 并且 按 销售额 的 4% 缴纳 税款 ， 那么 这个 钢厂 两个 季度 共 交 多少 税款 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22069", "content": "上海 世博会 期间 ， 园区 内 共有 120 辆 纯 电动 公交车 ， 每辆车 限 载 45 人 ． 如果 园区 内 的 纯 电 公交车 全部 满载 ， 一次 可以 运载 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15181", "content": "一 辆 汽车 每行 1 千米 耗油 (1/9) 升 ， 甲 城 与 乙 称 相距 90 千米 ， 这辆 汽车 从 甲 城 到 乙 城 至少 要 准备 多少 升 油 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18044", "content": "妈妈 比 小 亮 大 27 岁 ， 当 妈妈 的 年龄 是 小 亮 的 2.5 倍 时 ， 小 亮 几岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19468", "content": "李师傅 和 张师傅 在 同样 的 时间 内 共 做 了 176 个 零件 ， 李师傅 每分钟 做 7 个 ， 张师傅 每分钟 做 9 个 ， 他们 做 了 几分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13457", "content": "饲养场 养 鹅 100 只 ， 是 养鸭 只 数 的 (1/4) ， 养鸭 只 数 又 是 养鸡 只 数 的 (4/9) ， 饲养场 养鸡 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2422", "content": "多少 / (3/5) - (2/7) * (7/10) = (2/5) ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14466", "content": "6.75 减去 某 数 的 5 倍 得 2.75 ， 求 某 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16236", "content": "小莲庄 上午 来 了 787 位 游客 ， 中午 有 460 位 游客 离开 ， 下午 又 来 了 260 位 游客 ． 这时 小莲庄 一共 有 多少 游客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11479", "content": "一 个数 除以 3 ， 商 是 18 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19489", "content": "向阳 小学 开展 读书 活动 ． 四年级 读 150 本 ， 五年级 比 四年级 多 读 70 本 ， 六年级 读 的 本 数 是 五年级 的 3 倍 ， 向阳 小学 六年级 的 学生 读 了 多少 本书 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12960", "content": "从 学校 校门 到 教学楼 的 校 道长 42 米 ， 计划 在 两旁 从 起点 每隔 2 米 摆 一 盆花 ， 一共 要 准备 多少 盆花 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17765", "content": "某校 选出 50 人 参加 作文 和 数学 竞赛 ， 作文 竞赛 有 14 人 获奖 ， 数学 竞赛 有 12 人 获奖 ， 有 3 人 两项 竞赛 都 获奖 ， 有 多少 人 两项 竞赛 都 没 获奖 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6635", "content": "7 / 917 再 加上 25 得 多少 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20791", "content": "一 本 故事书 ， 小 明 第一天 读 了 全书 的 (2/15) ， 第 二 天 比 第一天 多 读 8 页 ， 这 是 已 读 页数 与 未 读 页数 的 比 是 3 ： 7 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9987", "content": "甲 、 乙 两辆 汽车 同时 从 两地 相对 开出 ， 3 小时 相遇 ， 相遇 时 乙 车行 了 全程 的 (7/12) ， 甲 车行 了 120 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17081", "content": "仓库 里 有 一批 玩具 ， 运出 这 批 玩具 数量 的 (3/7) 后 ， 又 运进 20 万件 ， 这时 仓库 里 的 玩具 比 原来 还 多 5 万件 ． 仓库 原来 有 玩具 多少 万件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5033", "content": "修 一条 路 ， 第一期 工程 修 了 全长 的 40% ， 第 二 期 工程 修 了 全长 的 30% ， 还 剩 750 米 没有 修 ． 这 条 路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11031", "content": "张 叔叔 在 菜市场 买 了 4.5 千克 豆角 ， 付 了 10 元 钱 ， 找回 1.9 元 ． 每千克 豆角 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "507", "content": "一 个 书包 按 原价 的 (2/3) 后 的 价钱 是 60 元 钱 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1448", "content": "某 水果店 第一天 卖出 水果 290 千克 ， 比 第 二 天 少卖 50 千克 ， 这个 水果店 两天 一共 卖出 水果 多少 千克 ！", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9605", "content": "六年级 有 学生 112 人 ， 五年级 比 六年级 多 25% ， 五年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16824", "content": "一 个 长 12.56 分 米 ， 宽 5 分 米 ， 高 4 分 米 的 长方体 鱼缸 里 装满水 ， 把 水 倒 进 底 面积 是 125.6 平方分米 的 圆柱形 鱼缸 里 ， 可 倒 多 高 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14061", "content": "14.529 + （ 2.471 - 2.1 ） = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3726", "content": "一 根 木头 长 10 米 ， 要 把 它 平均 分成 5 段 ， 每 锯下 一段 用 6 分钟 ， 锯 完 一共 要 花 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12579", "content": "玲玲 家 离 学校 只有 1620 米 ， 爸爸 骑 摩托车 用 3 分钟 就 将 她 送到 了 学校 ， 爸爸 用 同样 的 速度 去 上班 要 骑 25 分钟 ， 玲玲 家 离 爸爸 单位 有 多 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20340", "content": "一 条 公路 已 修好 了 25 km ， 比 没 修 的 正好 多 5 km ， 已 修好 的 公路 是 全长 的 几分 之 几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3034", "content": "两个 互质数 的 最小 公倍数 是 195 ， 其中 一个 数 是 13 ， 另 一个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11332", "content": "李 小 红 看 一本 80 页 的 故事书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/4) ． 还 剩 多少 页 没 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17331", "content": "甲 、 乙 两个 港口 相距 77 千米 ， 船速 为 每 小时 9 千米 ， 水流 速度 为 每 小时 2 千米 ， 那么 由 甲 港 到 乙 港 顺水 航行 需 多少 小时 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16023", "content": "75 的 (1/3) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5975", "content": "已知 圆柱 的 底面 半径 是 2 厘米 ， 侧 面积 是 62.8 平方厘米 ， 则 它 的 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15315", "content": "一 列 火车 夜间 行驶 了 800 千米 ， 上午 以 同样 的 速度 行驶 了 160 千米 ， 夜间 比 上午 多行 了 8 小时 ． 这 列 火车 的 速度 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1407", "content": "两地 相距 457 千米 ， 甲乙 两车 同时 从 两地 相对 开出 ， 行 了 5 小时 后 ， 还 差 57 千米 相遇 ． 已知 甲 车 每 小时 行 38 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10483", "content": "在 一次 跳高 比赛 中小 明 跳 过 了 1.17 米 ， 小 英 比 小 明 少 跳 了 0.05 米 ， 小 亮 比 小 英 多 跳 了 0.19 米 ， 小 亮 跳 过 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22285", "content": "王 庄 煤矿 今年 产 煤 250 万吨 ， 比 去年 增产 25% ． 去 年产 煤 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22479", "content": "小 明 和 小 军 在 学校 环形 跑道 上 跑步 ， 两 人 从 同 一点 出发 ， 反向而行 ， 小 明 每秒 跑 4 米 ， 小 军 每秒 跑 6 米 ， 经过 40 秒 两 人 相遇 ， 跑道 的 周长 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20003", "content": "一 车 水泥 重 (1/2) 吨 ， 如果 用 去 (1/3) ， 则 还 剩 这 车 水泥 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13509", "content": "5 （ 3 ） 班 共有 37 人 ， 如果 平均 每人 回收 1.5 千克 废纸 ， 1 千克 废纸 可 生产 0.8 千克 的 再生纸 ． 回收 的 废纸 可 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11876", "content": "一 个 水果店 运进 梨 1176 kg ， 比 运进 的 苹果 多 (2/5) ， 运进 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5851", "content": "王师傅 生产 一种 零件 ， 现在 生产 一个 需要 (2/5) 小时 ， 比 过去 节约 (7/25) 小时 ． 过去 生产 一个 零件 的 时间 = 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12701", "content": "一 筐 橘子 连 筐 重 34 千克 ， 吃掉 (1/4) 后 ， 连 筐 重 28 千克 ． 这个 筐 内 原来 有 橘子 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21841", "content": "甲 是 50 ， 乙 是 甲 的 30% ， 乙 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "700", "content": "商店 运 来 8 筐 苹果 和 12 筐 梨 ， 每 筐 苹果 38 千克 ， 每 筐 梨 42 千克 ， 商店 共运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20970", "content": "一 本 故事书 共 100 页 ， 小 红 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 20 页 ， 还 剩 全书 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15685", "content": "买 4 张 桌子 的 钱 可以 买 5 把 椅子 ， 每张 桌子 60 元 ， 每 把 椅子 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1662", "content": "方方 和 圆圆 用 同一个 数 做 除法 ， 方方 用 12 去除 ， 圆圆 用 15 去除 ， 方方 除 得 的 商 是 32 还 余 6 ． 圆圆 计算 的 结果 应该 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16998", "content": "按照 个人所得税法 规定 ， 每月 的 个人收入 超过 3000 的 部分 ， 应 按 5% 的 税率 征收 个人所得税 ， 小 明 的 爸爸 平均 每月 工资 4500 元 ， 小 明 的 爸爸 每月 应 缴纳 个人所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22339", "content": "一 条 裤子 28.5 元 ， 一件 上衣 的 价钱 是 它 的 1.8 倍 ， 做一套 这样 的 衣服 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17439", "content": "一 份 稿件 有 420 页 ， 由 两台 打印机 同时 打印 ． 甲 台 打印机 每分钟 打 5 页 ， 乙 台 打印机 每分钟 打 9 页 ， 几分钟 可 打印 完 这份 稿件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22749", "content": "一 辆 自行车 原价 560 元 ， 这辆 自行车 打 0.85 后 的 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6040", "content": "工程队 整修 河道 ， 上午 整修 了 (2/5) 千米 ， 下午 整修 了 (1/4) 千米 ， 全天 共 整修 河道 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6742", "content": "一 个 因数 6 ， 另 一个 因数 是 4 ， 积 = ？ 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9146", "content": "被除数 是 900 ， 商 是 24 ， 余数 是 12 ， 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20103", "content": "一 个 火力发电厂 采用 新 技术 后 ， 每天 烧煤 100 吨 ， 原来 烧 16 天 的 煤 ， 现在 可以 烧 20 天 ， 现在 每天 比 原来 节约 用 煤 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4484", "content": "比 6.7 少 0.9 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11921", "content": "塘 里 有 鹅 30 只 ， 是 鸭 的 (5/6) ， 鸭 有 多少 只 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1449", "content": "某 湖泊 的 最 宽 处 约 4400 m ， 是 长 的 (11/20) ， 该 湖泊 的 长 约 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2321", "content": "多少 千克 的 25% 是 12 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4701", "content": "从 154 里 连续 减去 多少 个 7 ， 正好 减 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7655", "content": "某 机械厂 赶制 300 台 农具 ， 已经 做 了 48 天 ， 平均 每天 生产 5 台 ， 剩下 的 要求 10 天 完成 ， 平均 每天 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12133", "content": "食堂 运进 一批 煤 ， 如果 用 去 这 批 煤 的 40% ， 剩下 的 比 用 去 的 多 200 千克 ， 那么 食堂 原来 运进 煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13125", "content": "8 米 的 (3/4) 和 30 米 的 多少 一样 长 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8865", "content": "汽车 5 小 行 275 千米 ， 摩托车 2 小 行 124 千米 ， 汽车 平均 每 小时 比 摩托车 慢 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8786", "content": "某 工程队 修 一条 长 31.5 千米 的 公路 ， 原 计划 20 天 完成 ， 实际 18 天 就 完成 了 ． 实际 每天 多 修 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13596", "content": "商店 有 一款 毛衣 ， 售价 120 元 ， 比 原价 便宜 40% ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8492", "content": "某 工厂 计划 制造 拖拉机 550 台 ， 比 原 计划 超额 了 50 台 ． 超额 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21587", "content": "盐 是 盐水 的 (1/11) ， 如果 盐 是 2 克 ， 水 = 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18675", "content": "小 宇 在 唱歌 比赛 中 有 4 个 评委 给 她 9.27 分 ， 3 个 评委 给 她 9.08 分 ， 她 的 总分 = 多少 分 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7973", "content": "某种 产品 ， 现在 每件 成本 37.4 元 ， 比 原来 降低 了 15% ， 原来 每件 成本 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19172", "content": "一 堆 煤 有 5 吨 ， 第一天 运走 了 它 的 (2/3) ， 第 二 天 又 运走 了 (2/5) 吨 ， 这时 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10439", "content": "修路 队 修 一条 路 ， 已经 修 了 4.5 千米 ， 还 剩下 55% 没有 修 ， 这 条 路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "760", "content": "商店 有 苹果 280 千克 ， 上午 卖出 132 千克 ， 下午 购进 145 千克 ． 这时 商店 有 苹果 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7383", "content": "一 个 商店 运 来 一批 水果 ． 运 来 的 草莓 有 1.35 吨 ， 运 来 的 西瓜 是 草莓 的 1.5 倍 ． 问 这个 商店 运 来 水果 一共 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6271", "content": "小 明 和小红 暑假 卖 冰棒 赚 零花钱 ， 他俩 以 相同 的 价格 买来 了 冰棒 ． 小 明 以 每 10 个 冰棒 6 元 的 价格 出售 ， 小 红 以 每 12 个 冰棒 7 元 的 价格 出售 ． 假设 他俩 售出 的 数目 相同 ， 请问 要 等 售出 多少 个 冰棒 后 ， 小 明 会 比 小 红 多 赚 4 元 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14928", "content": "甲 、 乙 两堆 煤 ， 甲 堆 煤 的 (2/3) 正好 是 乙 堆 煤 的 (3/5) ， 已知 乙 堆 煤 重 150 吨 ， 甲 堆 煤 重 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16980", "content": "一 本书 ， 读 了 这 本书 的 (3/5) ， 还 剩 这 本书 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13673", "content": "一 根 钢管 ， 用 去 25% ， 正好 用 去 (6/7) 米 ， 这根 钢管 一共 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1", "content": "镇海 雅乐 学校 二年级 的 小朋友 到 一条 小路 的 一边 植树 ． 小朋友 们 每隔 2 米 种 一棵树 （ 马路 两头 都 种 了 树 ） ， 最后 发现 一共 种 了 11 棵 ， 这 条 小路 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7008", "content": "小 明 做 15 道 数学题 ， 做 错 3 道 ， 1 道 空 着 没 做 ， 做 对 的 占 总数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6429", "content": "一 块 平行四边形 的 菜地 ， 底 是 20 米 ， 高 是 8 米 ． 每平方米 收 白菜 3 千克 ， 这块 地 共 能 收 白菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11520", "content": "一 个 工程队 修 一条 公路 ， 第一周 修 了 32 米 ， 还 剩下 全长 的 (7/8) 没有 修 ， 这 条 公路 的 全长 为 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19931", "content": "一 根 钢筋 ， 锯下 20% 后 ， 又 接上 2 米 ， 这时 钢筋 比 原来 短 (1/10) ， 原来 这根 钢筋 有 多长 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12931", "content": "一 辆 自行车 打 0.85 后 售价 153 元 ， 打折 后 便宜 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "176", "content": "解放军 叔叔 为 汶川 灾区 架设 一条 2000 米 的 通讯 线路 ， 前 3 天 平均 每天 架设 350 米 ， 剩下 的 2 天 架设 完 ， 最后 两天 平均 每天 要 架设 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19765", "content": "市政建设 要 为 “ 中环线 ” 安装 照明 设施 ， 第一 小队 工人 负责 安装 一批 电杆 ． 每天 装 12 根 ， 20 天 可以 完成 ． 如果 每天 装 15 根 ， 能够 提前 几天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6106", "content": "某人 以 0.8 优惠价 买 一套 衣服 节省 15 元 钱 ， 则 此人 买 这 套 衣服 用 去 多少 元 钱 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19314", "content": "小 红 从 家里 到 学校 ， 每分钟 走 75 米 ， 12 分钟 可以 到达 ． 按 这样 的 速度 ， 小 红 从 家里 出发 ， 已 走 了 8 分钟 ， 离 学校 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18186", "content": "甲 每 小时 加工 54 个 零件 ， 乙 每 小时 加工 45 个 零件 ， 甲 、 乙 共同 加工 6 小时 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "153", "content": "修 一条 长 2400 米 的 公路 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 余下 的 (1/3) ， 还 剩 多少 米 没 修 ．", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "11608", "content": "甲 容器 中 装有 一定 数量 的 糖 ， 乙 容器 中 装有 若干 千克 水 ， 先 从 甲 容器 中 取出 8 克 糖 放入 乙 容器 ， 搅拌 均匀 后 ， 又 将 乙 容器 中 的 糖水 倒 30 克 到 甲 容器 ， 搅拌 均匀 后 ， 甲 容器 中 糖水 浓度 为 40% ， 乙 容器 中 糖水 的 浓度 为 20% ， 甲 容器 此时 有 糖水 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10947", "content": "建材 仓库 原有 一批 钢材 ， 第一次 运出 原有 钢材 的 20% ， 第 二 次 又 运出 原有 钢材 的 (3/5) ， 这时 仓库 中 还 剩下 15 吨 钢材 ， 这 批 钢材 原有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2450", "content": "商店 售出 橘子 48 千克 ， 占 售出 水果 总数 的 (6/11) ． 售出 的 香蕉 占 售出 水果 总数 的 (1/4) ． 商店 售出 香蕉 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8419", "content": "李 刚 看 一 本书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 24 页 ， 第 3 天 看 的 页数 是 前两天 看 的 总数 的 150% ， 这时 还 剩下 全书 的 (1/4) 没有 看 ． 问 全书 共有 多页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "7992", "content": "粮店 运 来 50 袋 面粉 ， 每 袋 面粉 重 25 千克 ． 卖出 29 袋 后 ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12919", "content": "40 个 工人 用 30 小时 可以 完成 一批 零件 ． 若 有些 工人 临时 请假 ， 余下 的 工人 要 用 50 小时 才能 完成 这 批 零件 ． 有 多少 人 请假 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20046", "content": "一 种 糖水 重 400 g ， 其中 糖 的 质量 占 30% ， 现在 又 向 其中 加入 一定 质量 的 糖 ， 此时 糖 的 质量 占 (3/8) ． 现在 的 糖水 有 多重 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15211", "content": "360 * 72 + 36 * 280 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11441", "content": "有 5 千克 油 ． 用 去 全部 的 (2/5) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8350", "content": "一 位 会计 把 一笔 57.5 元 的 收入 款 ， 错误 地 记 成 5.75 元 ． 他 结帐 时 将 会 发现 怎样 的 错误 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22784", "content": "“ 6 • 一 “ 儿童节 ， 学校 开展 “ 为 贫困 儿童 献爱心 “ 活动 ． 五年级 同学 捐款 450 元 ， 六年级 捐款 数量 比 五年级 多 20% ． 六年级 捐款 数量 恰好 占 全校 捐款 总数 的 (1/4) ． 全校学生 一共 捐款 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5572", "content": "李老师 为 某 杂志社 审稿 ， 审 稿费 为 200 元 ． 为此 她 需要 按 3% 的 税率 缴纳 个人所得税 ， 她 应 缴 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3562", "content": "中国 铁路 第 5 次 提速 后 ， 一列 火车 由 原来 的 每 小时 行驶 80 千米 ， 提速 到 每 小时 行驶 120 千米 ， 现在 的 速度 比 原来 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21986", "content": "一 套 衣服 0.85 出售 可 便宜 45 元 ， 买 这样 一套 衣服 要 付 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "770", "content": "边长 是 6 分 米 的 正方形 纸 围成 一个 圆柱形 纸筒 （ 接头处 不计 ） ， 这个 纸筒 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13942", "content": "一 个 工人 每天 加工 零件 80 个 ， 3 个 工人 2 天 加工 零件 多少 个 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12756", "content": "做一套 儿童服装 ， 上衣 要 用布 1 米 ， 比 裤子 多用 0.15 米 ， 如果 做 10 套 儿童服装 ， 共 要 用布 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14529", "content": "王师傅 计划 做 1500 个 零件 ， 已经 做 了 5 天 ， 每天 完成 5% ， 还 剩 多少 个 零件 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6140", "content": "超市 购回 了 5 箱 苹果 ， 每箱 苹果 重 20 千克 ， 买 回 这些 苹果花 了 400 元 ， 这种 苹果 每千克 售价 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18155", "content": "4 年 3 班 有 学生 45 人 ， 其中 女生 24 人 ， 男生 占 全班 总 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15912", "content": "车上 原有 45 位 乘客 ， 到 站 后 下去 10 位 ， 上来 12 位 ， 现在 车上 有 多少 位 乘客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12666", "content": "同学 们 外出 植树 ． 女生 56 人 ， 男生 28 人 ， 每 6 人 分成 一组 ， 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20217", "content": "男女生 人数 比 为 5 ： 6 ， 则 女生 比 全班 人数 少 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9702", "content": "小 兰 6 分钟 走 了 390 米 ， 照 这样 的 速度 ， 她 从 家 到 学校 走 了 18 分钟 ， 她家 到 学校 有 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5303", "content": "从 甲地 到 乙地 ， 一辆 汽车 以 每 小时 50 千米 的 速度 行驶 4.8 小时 可以 到达 ． 汽车 实际 每 小时 比 计划 多行 10 千米 ． 这辆 汽车 实际 几小时 到达 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2816", "content": "一 瓶 2.5 升 的 饮料 ， 第一次 倒 出 它 的 (2/5) ， 第 二 次 倒 出 它 的 (1/8) ， 还 剩 这 瓶 饮料 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13272", "content": "小 红 和 小 芳 在 看 同 一种 科幻 书 ， 两天 后 ， 小 红 对 小 芳 说 ： “ 我 已经 看 了 全书 的 25% 了 ． ” 小 芳 说 ： “ 我 已经 看 了 全书 的 (1/3) ， 后面 还有 80 页 没 看 ． ” 那么 ， 小 红 已经 看 了 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5741", "content": "小林 的 妈妈 在 农业银行 买 了 6000 元 国家 建设 债券 ， 定期 3 年 ， 年利率 为 2.89% ， 到期 她 可 获得 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12128", "content": "学校 美术组 有 男生 12 人 ， 女生 13 人 ． 学校 绘画 组 的 人数 是 美术组 8 陪 ． 学校 绘画 组 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16581", "content": "春蕾 小学 去年 毕业 的 学生 有 160 人 ． 今年 毕业 的 学生 比 去年 毕业 的 学生 增加 15% ， 今年 毕业 的 学生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "234", "content": "5 （ 一 ） 班 有 18 人 参加 了 数学 兴趣小组 班 ， 占 全班同学 的 (1/3) ． 参加 美术组 的 人数 占 全班 人数 的 (2/9) ， 参加 美术组 的 同学 有 多少 名 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13774", "content": "一 部 书 ， 分 上 、 下 两册 ， 已知 上 册页 数 的 25% 与 下 册页 数 的 (2/5) 相等 ， 且 下册 共有 200 页 ， 这部 书 上册 有 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "461", "content": "一 本书 ， 小 红 已经 看 了 这 本书 的 (1/4) ， 还 剩 ( ( ( ) ) / ( ( ) ) ) 没 看 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8788", "content": "一 个 长方形 的 长 是 8 米 ， 宽 是 2 米 ， 这个 长方形 的 周长 = 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5805", "content": "小 吴 是 一个 菜农 ， 他 星期一 去 蔬菜 批发市场 运 来 46.5 千克 白菜 ， 星期 二 卖掉 了 33.9 千克 白菜 ， 星期 3 又 从 批发市场 运 来 50.5 千克 白菜 ， 最后 剩下 多少 千克 白菜 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7048", "content": "某 公司 一月份 营业额 是 120 万元 ， 如果 按 营业额 的 6% 缴纳 营业税 ， 这 公司 一月份 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14901", "content": "某 款 彩色 电视机 降价 10% 后 ， 每 台 售价 为 900 元 ， 这 款 彩色 电视机 原价 为 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16650", "content": "修 一条 路 ， 甲队 每天 修 6 小时 ， 4 天 可以 完成 ； 乙 队 每天 修 8 小时 ， 5 天 可以 完成 ． 现在 让 甲 、 乙 两队 合 修 ， 要求 2 天 完成 ， 每天 应 修 多少 小时 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "18308", "content": "用 一段 长 1 米 的 钢材 做 零件 ， 做 一个 零件 需 钢材 (3/20) 米 ， 做 了 5 个 这样 的 零件 ， 这 段 钢材 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8418", "content": "某人 步行 的 速度 为 每秒钟 2 米 ． 一列 火车 从 后面 开来 ， 越过 他 用 了 10 秒钟 ． 已知 火车 的 长 为 90 米 ， 求 列车 的 速度 为 多少 米 / 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5850", "content": "有 一个 平行四边形 的 面积 是 36 平方厘米 ， 底 是 9 厘米 ， 那么 它 的 高 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15644", "content": "身上 带有 22 元 的 小 明 的 钱 比 小 王 多 10% ， 则 小 王 有 多少 元 钱 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22578", "content": "一 台 电视 的 进价 是 a 元 ， 零售价 是 1100 元 ， 商店 按 零售价 的 80% 出售 ， 仍 可 获利 10% ， 则 a = 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5098", "content": "为 庆祝 “ 建党 90 周年 ” ， 实验 小学 全体 党员 教师 召开 茶话会 ， 买来 苹果 80 千克 ， 是 香蕉 的 (5/3) ， 买来 的 香蕉 是 糖 的 (9/2) ， 学校 买来 糖 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20808", "content": "扎西 读 一本 150 页 的 科技 书 ， 头 3 天 读完 20% ， 照 这样 计算 ， 读完 这 本书 一共 需要 几天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17429", "content": "小 张家 上个月 用电 62.6 度 ， 这个 月 比 上个月 少 用电 6.8 度 ， 这 两个 月 小 张家 一共 用电 多少度 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15724", "content": "北京 到 天津 的 公路 长 120 千米 ， 货车 要 行 2 小时 ， 货车 的 速度 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7200", "content": "从 侗乡 开往 苗 寨 的 火车 ， 原来 每 小时 行 120 千米 ， 7 小时 可以 到达 ． 火车 提速 后 ， 每 小时 可行 140 千米 ， 现在 从 侗乡 到 苗 寨 要 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5617", "content": "公园 运 来 180 盘 花 ， 准备 摆在 3 个 花坛 里 ， 平均 每个 花坛 摆 多少 盘 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19215", "content": "小 明 体重 40 kg ， 比 妈妈 轻 (1/6) ， 妈妈 体重 = 多少 kg ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8960", "content": "四川省 汶川县 发生 大 地震 之后 ， 育才 小学 举行 了 “ 心 手 相连 ” 的 捐书 活动 ． 五年级 共 捐 了 108 本书 ， 比 六年级 少 捐 10% ， 六年级 捐 了 多少 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17609", "content": "7 - 4.36 + 5.378 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "402", "content": "操场上 有 24% 的 同学 在 踢毽子 ， 有 36% 的 同学 在 玩 打 口袋 ， 玩 打 口袋 的 同学 比 踢毽子 的 同学 多 6 人 ． 操场上 现在 有 多少 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9843", "content": "把 (4/3) 升 的 牛奶 平均 装 在 4 个 瓶子 里 ， 则 每 瓶装 多少 升 ． （ 每个 瓶子 容积 足够 大 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19414", "content": "三年级 1 班 第 二 小组 4 名 同学 测量 身高 ， 王 强 142 厘米 ， 陈 丹 156 厘米 ， 小 慧 130 厘米 ， 发现 他们 平均 身高 是 145 厘米 ， 郑 琪 身高 = 多少 厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "1817", "content": "爱 玲 第一次 数学 测试 考 了 70 分 ， 第 二 次 考 了 91 分 ， 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14537", "content": "一 个 正方体 ， 6 个 面上 分别 写 着 数字 1 ～ 6 ， 掷 一次 ， 出现 数字 “ 3 ” 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19521", "content": "一 堆 货物 ， 第一天 和 第 二 天 各 运走 货物 的 (1/3) 后 ， 仓库 还 剩下 30 吨 货物 ， 仓库 原来 有 货物 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4870", "content": "甲 数 的 (1/4) 是 乙 数 的 3 倍 ， 乙 数 是 7 ， 甲 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11025", "content": "某校 五年级 学生 参加 艺术 考级 的 有 183 人 ， 其中 考 美术 的 有 35 人 ， 考 声乐 的 人数 是 考 美术 的 3.2 倍 ， 其余 的 是 考 器乐 的 同学 ， 考 器乐 的 同学 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8780", "content": "一 辆 货车 与 一辆 客车 同时 分别 从 甲乙 两地 相对 开出 ， 4 小时 后 相遇 ． 已知 货车 每 小时 行 75 千米 ， 货车 与 客车 的 速度 比 是 3 ： 5 ． 求 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10921", "content": "小 明 和小红 共 重 78 千克 ， 小 明 比 小 红 重 8 千克 ， 小 红 重 多少 千克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17622", "content": "已知 两个 因数 的 积 是 0.35 ， 其中 一个 因数 是 1.4 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13337", "content": "小 军 练习 投篮 200 次 ， 命中率 是 60% ， 小 亮 投中 了 多少 次 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11278", "content": "一 堆 煤 重 986 千克 ， 平均 每天 烧 34 千克 ， 这 堆 煤 可以 烧 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11477", "content": "一 个数 的 (2/5) 比 (8/3) 的 90% 还 多 2 ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16662", "content": "商店 运 来 3 种 水果 ， 其中 梨 的 重量 占 (1/5) ． 苹果 的 重量 与 梨 、 香蕉 两种 水果 重量 之 和 的 比 为 1 ： 3 ， 香蕉 有 220 千克 ． 商店 共运 来 水果 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10465", "content": "56 的 (5/7) 正好 是 一个 数 的 (1/4) ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2158", "content": "通过 特快专递 寄 邮件 每份 需要 22 元 ． 王 叔叔 寄 邮件 时 付出 200 元 ， 找回 46 元 ． 他 共 寄 了 几份 邮件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21783", "content": "某 车间 制造 一种 零件 ， 每个 零件 原来 用 3.6 千克 钢材 ， 现在 减少 了 0.4 千克 ． 过去 做 800 个 零件 所用 的 钢材 ， 现在 可以 多 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8818", "content": "小 红 要 打印 一份 200 页 的 稿件 ， 已经 打印 了 (5/8) ， 还要 打印 几分 之 几 才能 打 完 这份 稿件 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11499", "content": "一 个 商店 有 钢笔 120 枝 ， 正好 是 铅笔 枝 数 的 (3/4) ， 这个 商店 有 铅笔 多少 枝 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10023", "content": "体育老师 买来 5 箱 乒乓球 ， 每箱 24 筒 ， 每 筒 6 个 ． 一共 买来 多少 个 乒乓球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3474", "content": "用 一批 布 做 服装 ， 每套 服装 用布 3.6 米 ， 可以 做 120 套 ． 如果 每套 服装 节约 用布 20% ， 这 批 布 可以 做 多少 套 服装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5140", "content": "某日 傍晚 ， 气温 从 中午 的 零 上 5 ° c 下降 到 零下 1 ° c ， 气温 下降 了 多少 ° c ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10778", "content": "通讯 器材厂 第一季度 生产 bp机 5600 台 ， 比 电话机 多 (1/7) ， 比 电话机 多 多少 台 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21645", "content": "工地 运 来 沙子 150 吨 ， 是 运 来 水泥 的 1.2 倍 ． 工地 运 来 水泥 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5288", "content": "一 辆 快车 和 一辆 慢车 同时 从 甲乙 两地 相向 而 行 ， 8 小时 后 ， 快车 距 乙地 还有 全程 的 (1/10) ， 慢车 距 甲地 还有 192 千米 ， 已知 快车 每 小时 比 慢车 多行 16 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8173", "content": "王 叔叔 用 货车 运送 一批 2 吨重 的 货物 ， 第一天 运 了 这 批 货物 的 (1/5) ， 第 二 天运 了 这 批 货物 的 (3/8) ， 还 剩下 这 批 货物 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16913", "content": "少年宫 乐队 有 女同学 18 人 ， 男同学 26 人 ． 合唱队 的 人数 是 乐队 的 4 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5561", "content": "3 + 5 + 6 - 14 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1203", "content": "有 一些 同学 站 成 一行 ， 间隔 2 米 ． 王 强 前面 有 4 人 ， 后面 有 5 人 ， 这 条 队伍 长 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "11354", "content": "一 块 白布 的 长度 比 花布 的 6 倍 少 9 米 ， 一块 花布 32 米 ． 这块 白布 有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3830", "content": "小 红 家 把 今年 收 来 的 1470 千克 玉米 装入 袋子 里 ． 先 用 大 袋子 装 ， 每 袋子 装 50 千克 ， 装 了 24 袋 后 改用 小 袋子 装 ， 每 袋装 30 千克 ． 还要 装 多少 个 小袋 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17713", "content": "某 工程队 修 一条 路 ， 第一天 修 了 全长 的 20% ， 第 二 天 修 了 300 米 ， 这时 剩下 的 与 已修 的 米 数 比 是 11 ： 9 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15376", "content": "一 个 圆柱 的 侧 面积 是 188.4 平方分米 ， 底面 半径 是 2 分 米 ． 它 的 高 = 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12161", "content": "食堂 运 来 大米 300 千克 ， 运 来 的 面粉 是 大米 的 (5/6) ， 运 来 大米 和 面粉 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2914", "content": "有 含盐 3% 的 盐水 500 毫升 ， 加入 多少 毫升 的 水 就 变成 含盐 2% 的 盐水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18391", "content": "甲 、 乙 两队 修 一条 水渠 ， 甲队 修 了 全长 的 (1/3) ， 乙 队 修 了 全长 的 (2/5) ， 已知 甲队 修 了 160 米 ， 乙 队 修 了 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21786", "content": "8.53 的 3 倍 - 32.5 与 0.2 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13375", "content": "把 一个 数 扩大 100 倍 后 ， 是 9.3 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7746", "content": "一 个数 的 80 倍 是 560 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6888", "content": "小 华 读 一本 故事书 ， 第一天 读 了 全书 的 (3/8) ， 第 二 天 读 了 余下 页数 的 (1/5) 还 多 8 页 ， 还有 52 页 没有 读 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19793", "content": "李老师 家 新 买 了 一套 96 平方米 的 单元房 ， 每平方米 1200 元 ， 李老师 买房 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6233", "content": "从 9.6 中 连续 减去 多少 个 0.24 后 ， 还 剩下 2.4 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11770", "content": "一 种 电视机 打 0.8 后 ， 每 台 售价 960 元 ， 这种 电视机 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16053", "content": "生产 小组 加工 一批 零件 ， 原 计划 用 14 天 ， 平均 每天 加工 1500 个 零件 ． 实际 每天 加工 2100 个 零件 ． 实际 用 了 多少 天 就 完成 了 加工 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10784", "content": "把 横截面 直径 都 是 20 厘米 的 4 根 圆木 捆 在 一起 ， 如果 不 考虑 接头 ， 捆 一圈 至少 要 用 多少 厘米 铁丝 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9945", "content": "仓库 有 一批 化肥 ， 运出 (3/7) 后 ， 又 运进 20 吨 ， 这时 仓库 里 的 化肥 比 原来 还 多 5 吨 ， 仓库 原有 化肥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18577", "content": "(3/8) 吨 比 多少 吨 少 (1/8) 吨 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12992", "content": "杨 阿姨 的 花店 上个月 卖出 茉莉花 125 盆 ， 茉莉花 每 盆 36 元 ， 她 共 卖出 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1000", "content": "实验 小学 六年级 有 女生 120 人 ， 比 男生 的 (2/3) 少 24 人 ． 实验 小学 六年级 学生 共有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8378", "content": "体育课 上 拍球 的 分成 4 组 ， 每组 有 6 个 同学 ， 踢毽子 的 有 12 人 ， 拍球 的 和 踢毽子 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18811", "content": "一 件 衣服 打 0.8 便宜 了 24 元 ， 现价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3854", "content": "天气 转 冷 ， 一家 羽绒服 店 这个 月 卖出 了 200 件 羽绒服 ， 比 上个月 多 卖出 25% ， 这家 羽绒服 店 上个月 卖出 多少 件 羽绒服 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "47", "content": "一 辆 特快 列车 3 小时 行驶 480 千米 ， 它 的 速度 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8126", "content": "学校 大修 需要 用 水泥 ， 已知 第一次 运 了 12 车 ， 平均 每 车运 4.5 吨 ； 第 二 次 运 9 车 ， 平均 每 车运 4 吨 ． 两次 运 来 的 水泥 在 工地 上 用 了 30 天 后 ， 还 剩下 15 吨 ， 求 工地 上 平均 每天 用 掉 水泥 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5160", "content": "一 块 菜地 的 (5/8) 种 了 菜花 ， (2/8) 种 了 黄瓜 ， 剩余 的 种 了 西红柿 ， 种 西红柿 的 面积 占 这块 菜地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15529", "content": "黄 天 村 今年 拥有 彩电 240 台 ， 比 去年 增加 80 台 ， 今年 比 去年 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2700", "content": "临街 小学 六年级 一班 有 学生 52 人 ， 占 全校学生 人数 的 (4/19) ． 这个 小学 共有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21719", "content": "黑板报 的 (2/7) 是 “ 数学 天地 ” ， (1/2) 是 “ 习作 园地 ” ， 剩下 部分 是 “ 世界各地 ” ． “ 世界各地 ” 占 黑板报 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3103", "content": "甲 数 和 乙 数 的 比 是 4 ： 5 ， 则 甲 数 是 乙 数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15958", "content": "从 一个 长方体 上 截下 一个 体积 是 32 立方厘米 的 小 长方体 后 ， 剩下 的 部分 是 一个 棱 长 4 厘米 的 正方体 ， 原 长方体 最长 的 一条 棱 长 长度 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13412", "content": "一 条 绳子 ， 第一次 剪 去 它 的 (1/4) ， 第 二 次 剪 去 余下 的 (1/5) ， 这时 还 剩下 10 米 ， 这 条 绳子 原来 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19090", "content": "有 苹果 12 千克 ， 苹果 比 梨 多 (1/3) ， 苹果 比 梨 多 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16042", "content": "计算 ： （ 2.5 * (4/5) ） / （ (1/4) * 0.8 ） - 0.75 / (3/40) = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12272", "content": "东东 看 一本 故事书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 比 第一天 多 看 15 页 ， 还 剩 75 页 没有 看 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20746", "content": "车间 要 加工 4700 个 零件 ， 每天 加工 150 个 ， 当 还 剩 200 个 没 加工 完 时 ， 这个 车间 已经 加工 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22388", "content": "工程队 修 一条 长 1400 的 公路 ， 已经 修 了 680 米 ， 剩下 的 要 在 12 天 内 完成 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3069", "content": "有 一块 平行四边形 钢板 ， 底 是 6.5 分 米 ， 高 是 3.4 分 米 ． 如果 每 平方分米 钢板 重 0.75 千克 ， 这块 钢板 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16399", "content": "一 个 长方体 的 金鱼缸 ， 长 是 7 分 米 ， 宽 是 5 分 米 ， 高 是 8 分 米 ， 前面 的 玻璃 不 小心 被 打坏 了 ， 修理 时 配 上 的 玻璃 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3787", "content": "有 一堆 煤 ， 第一天 运走 (2/5) 吨 ， 第 二 天 运走 与 第一天 同样 多 ， 两天 一共 运走 了 这 堆 煤 的 (1/2) ． 这 堆 煤 原来 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20871", "content": "桃树 的 棵 数 是 梨树 的 (1/3) ， 梨树 的 棵 数 是 杨树 的 (2/5) ， 已知 桃树 有 30 棵 ， 杨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18581", "content": "王 叔叔 买 了 一套 价值 80 万元 的 房子 ， 首付 40% ， 其余 的 贷款 20 年 ， 年利率 7.8% ． 王 叔叔 一共 要 支付 多少 利息 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20816", "content": "学校 买 了 320 本 练习本 ， 分给 三年级 5 个 班 ， 平均 每个 班 分 得 47 本 ， 还 剩 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5861", "content": "商场 打折 ， 原价 是 120 元 的 裤子 0.8 出售 ， 降价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9300", "content": "妈妈 用 5000 元 购买 3 年期 国债 ， 年利率 是 5.58% ， 到期 时 妈妈 一共 可以 兑换 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19570", "content": "一 根 铁丝 长 20 米 ， 用 去 (3/4) 后 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21066", "content": "一 种 洗衣机 ， 0.8 后 售价 是 560 元 ， 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4611", "content": "陕西 兵马俑 中 ， 步兵 俑 占 陶俑 总数 的 (2/5) ， 其他 陶俑 比 步兵 俑 多 1600 件 ， 你 能 求 出 陶俑 的 总数 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16221", "content": "学校 举行 校园文化 艺术节 ， 六年级 同学 都 报名 参加 了 文艺 组 和 书画 组 ． 已知 有 (2/3) 的 同学 参加 文艺 组 ， (5/12) 的 同学 参加 书画 组 ， 其中 12 个 同学 两个 小组 都 参加 ． 六年级 学生 的 总 人数 = 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22989", "content": "3 个 同学 进行 跳绳 比赛 ． 小 明 跳 了 120 个 ， 是 小强 跳 的 (3/4) ， 小 亮 跳 的 是 小强 的 (13/16) ， 小 亮 跳 了 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10241", "content": "粮店 运 来 50 袋 大米 和 40 袋 面粉 ， 每 袋 大米 25 千克 ， 每 袋 面粉 20 千克 ． 运 来 的 大米 比 面粉 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10958", "content": "学校 图书馆 有 25 个 书架 ， 每个 书架 有 4 层 ， 每层 放 80 本书 ， 一共 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22461", "content": "玩具厂 去年 计划 生产 玩具 熊猫 6700 只 ． 实际上 半年 生产 3976 只 ， 下半年 生产 4054 只 ． 超过 计划 多少 只 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10041", "content": "已经 包装 的 是 糖果 总数 的 (2/5) ， 再 包装 21 千克 ， 则 已 包装 的 正好 是 糖果 总数 的 (3/4) ． 这 批 糖果 一共 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2997", "content": "洗衣机 厂 原 计划 生产 洗衣机 2160 台 ， 30 天 完成 ， 实际 每天 比 原 计划 多 生产 18 台 ， 实际 多少 天 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15591", "content": "b 栋 教学楼 有 6 间 教室 ， 共 坐 了 480 个 学生 ， 平均 每个 教室 坐 了 多少 学生 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7426", "content": "建造 一幢 教学大楼 ， 计划 投资 150 万元 ， 实际 投资 比 计划 节省 (1/5) ， 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4421", "content": "99 + 198 + 297 + 396 + 495 + 594 + 693 + 792 + 891 + 990 = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "12017", "content": "一 个数 除以 14 ， 商 是 6 ， 余数 是 最小 的 一位数 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1084", "content": "小 红 家 有 一些 大米 ， 爸爸 说 ： “ 已经 吃 了 20% ， ” 妈妈 说 ： “ 如果 再 买进 30 千克 ， 就 和 原来 一样 多 ． ” 小 红 家 原来 有 多少 千克 大米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18365", "content": "一 张 18 元 钱 的 儿童乐园 标 打 0.8 后 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "991", "content": "王师傅 上午 加工 210 个 零件 ， 下午 加工 了 280 个 零件 ． 如果 每 小时 加工 70 个 ， 他 下午 比 上午 多 加工 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3974", "content": "在 一次 数学 竞赛 中 ， 小 华 做 对 了 18 道 题 中 的 (5/6) ， 小 华 做 对 了 几道 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18404", "content": "某 钢铁厂 去年 上半年 完成 全年 计划 的 (3/5) ， 下半年 练 钢 8 万吨 ， 全年 实际 产量 超过 全年 计划 的 (1/10) ． 全年 计划 为 多少 万吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4936", "content": "小 娟 给 了 小 燕 5 本 故事书 ， 两 人 的 故事书 同样 多 ， 原来 小 娟 比 小 燕 多 多少 本 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "736", "content": "某 运输队 要 运 100 吨 货 ， 第一次 运货 20 吨 ， 第 二 次 运货 的 吨数 是 第一次 的 1.2 倍 ， 剩下 的 4 次 运 完 ， 平均 每次 运货 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16288", "content": "英国 数学家 、 物理学家 、 万有引力 定律 的 发现者 牛顿 于 1642 年 出 生于 英国 林肯郡 ． 同一 年 ， 意大利 科学家 伽利略 逝世 ． 今年 是 2013 年 ， 那么 这 = 多少 年前 的 事情 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12476", "content": "一 个 小数 先 把 它 扩大 10 倍 ， 再 缩小 100 倍 ， 结果 是 10.3 ， 原来 这个 小数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9581", "content": "小 明 家 有 白兔 48 只 ， 黑 兔 比 白兔 多 24 只 ， 把 黑 兔 平均 装 在 9 个 笼子 里 ， 每个 笼子 里 装 几只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1689", "content": "学校 今年 暑假 从 7 月 1 日 开始 ， 8 月 31 日 结束 ， 暑假 共有 多少 天 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19149", "content": "为 庆祝 校庆 ， 五3 班 要 做 180 面 小旗 ， 已经 做 了 (5/6) ， 还有 多少 面 没 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16033", "content": "一 条 绳子 剪 去 (5/7) ， 剩下 的 比 剪 去 的 短 18 m ， 这 条 绳子 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10388", "content": "一 张 办公桌 125 元 一把 办公椅 45 元 ， 买 了 16 套 桌椅 一共 要 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6268", "content": "计算 ： 31.8 / 2.3 + 386 / 46 - 4.88 / 0.23 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18095", "content": "冰 化成 水 后 ， 体积 比 原来 减少 (1/12) ． 一块 480 立方厘米 的 冰块 化成 水 后 ， 体积 = 多少 立方厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12596", "content": "采煤 队 5 月份 计划 采煤 3200 吨 ， 实际 超产 5% ， 实际 采煤 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9401", "content": "一 套 《 新 分类 作文 》 读物 125 元 ， 一套 《 新 看 图 作文 》 读物 213 元 ， 明明 买 了 这 两套 读物 ， 一共 需要 多少 元 钱 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13577", "content": "街心公园 的 总面积 为 24000 平方米 ， 其中 建筑 、 道路 等 占 公园 总面积 的 25% ， 其余 为 绿地 ． 街心公园 的 绿地面积 有 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3393", "content": "动物园 有 8 只 大象 ， 56 只 猴子 ， 猴子 的 数量 是 大象 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17743", "content": "一 个 篮球 60 元 ， 一个 排球 价钱 是 篮球 的 85% ， 一个 排球 比 篮球 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "662", "content": "一 个数 的 50% 比 45 的 (2/9) 多 16 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9576", "content": "某 服装店 出售 某种 服装 ， 已知 售价 比 进价 高 20% 以上 才能 出售 ． 为了 获得 更 高 的 利润 ， 该 店老板 以 高出 进价 80% 的 格 标价 ． 若 你 想 买下 标价 360 元 的 这种 服装 ， 店老板 最 多 降价 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18976", "content": "一 列 火车 有 40 节车厢 ， 每 节车厢 从 里面 量 长 13 米 、 宽 2.7 米 、 高 3 米 ， 这 列 火车 的 容积 = ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2675", "content": "做 一批 零件 ， 原 计划 每天 生产 40 个 ， 实际 每天 比 原 计划 多 生产 10 个 ， 结果 提前 5 天 完成 任务 ， 原 计划 要 生产 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13094", "content": "小 明 用 150 元 买 3 个 热水瓶 ， 营业员 找 了 6 元 ， 每个 热水瓶 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22866", "content": "铺 一条 街道 已经 铺 了 (2/5) 千米 ， 正好 铺 了 全长 的 (3/4) ， 这 条 街道 全长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17001", "content": "有 一堆 黄沙 ， 用 去 这 堆 黄沙 的 (1/4) 后 ， 又 用 去 12 吨 ， 两次 一 共用 去 黄沙 30 吨 ， 这 堆 黄沙 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10908", "content": "建筑工地 有 一批 水泥 ， 第一天 用 去 这 批 水泥 的 (2/5) ， 第 二 天 用 去 120 袋 ， 还 剩 30 袋 ． 这 批 水泥 原有 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3578", "content": "学校 有 篮球 38 个 ， 排球 比 篮球 多 15 个 ， 足球 比 篮球 少 10 个 ， 排球 有 多少 个 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8822", "content": "从 安阳 开往 广州 的 火车 有 乘客 725 人 ， 到 郑州 站 有 106 人 下车 ， 348 人 上车 ． 这时 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16118", "content": "水果 商店 卖出 了 橘子 280 千克 ， 卖出 的 苹果 比 橘子 多 65 千克 ， 卖出 的 梨子 是 苹果 的 2 倍 多 40 千克 ， 卖出 梨子 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1339", "content": "一 列 火车 每 小时 行驶 130 千米 ， 从 北京 到 上海 共 行驶 了 8 小时 ， 北京 到 上海 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20165", "content": "一 个 等腰 梯形 的 上 底 是 8 厘米 ， 下 底 是 6 厘米 ， 一条 腰 长 7 厘米 ， 围成 这个 等腰 梯形 至少 要 多少 厘米 长 的 铁丝 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7456", "content": "果园 里 有 268 棵 桃树 ， 比 苹果树 少 155 棵 ， 两种 树 共有 多少 棵 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18882", "content": "小 丽 每分钟 打字 103 个 ， 5 分钟 大约 打 多少 个 字 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22967", "content": "一 批 水果 已经 卖出 (1/4) ， 正好 比 剩下 的 少 40 千克 ， 这 批 水果 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15231", "content": "有 一批 布料 ， 如果 只 做 上衣 可以 做 10 件 ， 如果 只 做 裤子 可以 做 15 条 ， 那么 这 批 布料 可以 做 几套 这样 的 衣服 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9261", "content": "一 个 长 20 厘米 ， 宽 15 厘米 的 长方体 水槽 中 水深 6 厘米 ， 放入 一 正方体 石块 后 ， 水深 10 厘米 ， 这 石块 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "177", "content": "把 一个 高 是 40 厘米 的 圆柱 的 侧面 展开 ， 得到 一个 正方形 ， 这个 圆柱 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14177", "content": "一 个数 的 20% 是 100 ， 这个 数 的 35% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4712", "content": "养猪场 去年 养猪 280 头 ， 今年 比 去年 增加 40% ， 今年 养猪 多少 头 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13619", "content": "商店 运进 一批 苹果 ， 上午 每 出 了 (3/8) ， 下午 卖出 了 (4/8) ， 这天 一共 卖 了 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7462", "content": "装满 一个 水池 需要 80 吨 水 ． 甲 管 单独 开 5 小时 可 把 满 池水 放 完 ， 乙 管 每 小时 可 放入 24 吨 水 ． 如果 两 管 齐 开 ， 多少 小时 可 把 空 池 装满 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5998", "content": "学学 和 思思 分别 从 a 、 b 两地 同时 出发 ， 相向 而 行 ． 学学 每分钟 走 50 米 ， 思思 每分钟 走 30 米 ， 出发 5 分钟 后 两 人 相遇 ． 那么 ab 两地 相距 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21360", "content": "小 明 把 5000 元 压岁钱 存入 银行 ， 定期 一年 ， 年利率 是 2.79% ， 到期 实 得 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21672", "content": "一 种 电扇 原价 400 元 ， 第一次 降价 20% ， 第 二 次 降价 (1/10) ， 现在 电扇 售价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9190", "content": "用 2 、 3 、 5 、 7 、 9 这 5 个 数字 进行 4 则 混合 运算 ， 每个 数字 只能 用 一次 ， 能够 得到 的 最大 的 质数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17717", "content": "一 批 稻谷 ， 第一次 运 了 总数 的 (1/6) ， 第 二 次 运 了 总数 的 (2/7) 又 5 吨 ， 还 剩 18 吨 ， 这 批 稻谷 共 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16876", "content": "某 工程队 修 一条 路 ， 第一天 修 了 全长 的 (3/10) ， 第 二 天 修 了 剩下 部分 的 (5/14) ， 结果 还 剩 81 千米 没有 修 ， 这 条 路 全长 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2836", "content": "在 一个 长方形 容器 里 ， 装有 12 厘米 深 的 水 ， 由于 天气 突变 ， 上面 结 了 一层 冰 ， 冰 的 厚度 为 3.6 厘米 ． 已知 水 结冰 体积 要 增加 (1/11) ， 这时 冰层 下 的 水深 多少 厘米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3200", "content": "一 个 梯形 的 面积 是 0.81 m ^ 2 ， 高 是 0.9 m ， 这个 梯形 上 底 与 下 底 的 和 = 多少 m ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "997", "content": "三年级 有 14 个 班 ， 平均 每班 46 人 ， 其中 男同学 有 358 人 ， 女同学 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4683", "content": "有 一 正方形 操场 ， 每 边 都 栽种 4 棵 树 ， 4 个 角 各种 1 棵 ． 问 共 种树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21026", "content": "一 根 木头 锯 4 段 要 12 分钟 ． 照 这样 的 速度 ， 锯 6 段 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1240", "content": "一 个 梯形 的 面积 是 24.6 cm ^ 2 ， 和 它 等 高 的 平行四边形 的 底 等于 梯形 两 底 之 和 ， 这个 平行四边形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6567", "content": "一 本书 已 看 了 (4/7) ， 看 的 比 没 看 的 多 36 页 ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20113", "content": "有 两个 容量 都 为 1000 毫升 的 瓶子 内 装满 了 橄榄油 和 醋 的 混合 溶液 ． 第一个 瓶子 内 的 橄榄油 是 醋 的 3 倍 、 第 二 个 瓶子 内 的 橄榄油 是 醋 的 4 倍 ． 现 将 它们 全部 倒入 一个 较大 的 容器 内 ， 在 新 的 混合 溶液 中 ， 橄榄油 的 体积 = 多少 毫升 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "2693", "content": "修 一条 路 ， 第一天 修 了 全长 的 (2/3) ， 第 二 天 修 了 全长 的 20% ， 还 剩 2.6 千米 没 修 ， 这 条 路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2646", "content": "一 列 火车 6 时 行驶 了 全程 的 (1/3) ， 平均 每 时 行驶 全程 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18287", "content": "一 个数 除以 7 ， 加 28 ， 乘以 5 ， 等于 700 ， 这个 数 是 几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8362", "content": "小 明 (2/5) 小时 行走 了 (6/5) 千米 ． 照 这样 计算 ， (3/4) 小时 可以 行走 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15311", "content": "12 的 (3/4) 与 6 的 差 除以 5 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12937", "content": "瑞安 “ 大润发 ” 超市 原有 20 千克 装 的 大米 500 袋 ， 有 一天 上午 卖出 50 袋 ， 收入 1200 元 ， 下午 又 卖出 同样 的 大米 35 袋 ， 这 一天 出售 这种 大米 共 收入 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9484", "content": "汽车 上山 速度 为 每 小时 40 千米 ， 行 了 5 小时 ， 按 原 路 下山 只用 了 4 小时 ， 汽车 下山 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15073", "content": "小 红 原有 19.04 元 钱 ， 买 本子 用 去 了 7.8 元 ， 妈妈 又 给 了 他 4.5 元 ． 小 红 现在 有 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1148", "content": "一 台 电视机 降价 20% 后 售价 1200 元 ， 降价 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13514", "content": "一 个 比 的 前项 是 (1/2) ， 比值 是 (1/3) ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5670", "content": "商店 运 来 一批 水果 ， 其中 苹果 有 180 kg ， 梨 比 苹果 多 (1/9) ， 梨 比 苹果 多 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12490", "content": "一 种 树苗 经过 试种 有 10% 的 未 成活 ， 为了 保证 种 活 360 棵 ， 至少 要 种 多少 棵 树苗 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17822", "content": "书架上 有 两层 书 ， 上层 64 本 ， 下层 80 本 ， 当 上层 给 下层 多少 本 时 ， 下层 的 本 数 是 上层 的 3 倍 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13912", "content": "李 明 收集 邮票 42 枚 ， 王 红 收集 的 邮票 比 李 明 多 (2/7) ． 李 明 比 王 红 少 收集 邮票 多少 枚 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9372", "content": "281 与 119 的 和 ， 除以 8 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "344", "content": "小 明 和 小 亮 各 有 一些 玻璃球 ， 小 明说 ： “ 你 有 球 的 个数 比 我 少 (1/4) ！ ” 小 亮 说 ： “ 你 要是 能 给 我 你 的 (1/6) ， 我 就 比 你 多 2 个 了 ！ ” ． 小 明 原有 玻璃球 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21426", "content": "有 10 名 男同学 排成 一排 ， 在 每 两名 男同学 之间 插入 一名 女同学 ， 女同学 一共 有 几名 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17248", "content": "一 瓶 饮料 有 (1/2) 升 ， 24 瓶 饮料 装 一箱 ， 一箱 饮料 有 多少 升 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1166", "content": "在 学校 举办 的 “ 我 是 遵纪守法 小 明星 ” 演讲 活动 中 ， 已有 18 名 学生 演讲 完 ， 比 未 演讲 的 人数 少 (3/5) ． 参加 演讲 的 共有 多少 名 学生 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1361", "content": "学校 到 小 黄山 进行 植树 活动 ， 本次 活动 成活 了 950 棵 ， 未 成活 的 棵 数 占 总数 的 (1/20) ， 学校 一共 栽 了 多少 棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8950", "content": "如果 一个 平行四边形 的 底 是 10 厘米 ， 高 是 5 厘米 ， 那么 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17274", "content": "如果 a 的 (4/5) 是 20 ， 那么 a 为 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11433", "content": "小 红 9 天 共 看书 108 页 ， 照 这样 计算 ， 她 再 看 4 天 就 能 把 这 本书 看 完 ， 这 本书 一共 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1347", "content": "一 条 输电 线路 最 多 能 同时 给 3 台 空调 供电 ， 某 公司 在 4 个 房间 里 各 安装 了 一台 这样 的 空调 ． 想一想 ， 在 每天 24 小时 里 ， 平均 每个 房间 可以 使用 空调 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9306", "content": "一 个 圆柱 的 底面 半径 为 2 厘米 ， 高 是 3 厘米 ， 圆柱 的 体积 = 多少 立方厘米 ．", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "6889", "content": "学校 原来 有 18 台 电脑 ， 又 买 了 17 台 ， 如果 每个 办公室 装 5 台 电脑 ， 可以 安装 多少 个 办公室 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8831", "content": "某 行 一段路 ， 客车 第一 小时 行 了 这 段 路 的 (1/4) ， 第 二 小时 行 了 这 段 路 的 (2/5) ， 距 终点 还有 140 千米 ． 这 段 路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20762", "content": "某 工厂 的 女工 的 占 (3/4) ， 又 招进 50 名 男工 ， 这时 女工 占 总 人数 的 (2/3) ， 工厂 原有 多少 工人 ？", "knowledge": ["-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "6341", "content": "一 本书 有 21 页 ， 平均 每天 看 这 本书 的 3 页 ， 占 全书 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10835", "content": "新华 印刷厂 计划 6 月份 装订 图书 13.6 万册 ， 实际上 半月 装订 6.8 万册 ， 比 下 月 少 装订 0.9 万册 ． 实际 全 月 装订 多少 万册 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14830", "content": "一 件 衣服 的 原价 是 100 元 ， 因 销售 旺季 来临 ， 提价 40% ， 一段时间 后 ， 因 样式 陈旧 不得不 降价 10% ． 现价 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4096", "content": "ab 两 人 从 相距 100 千米 的 两地 同时 出发 相向 而 行 ， a 每 小时 走 8 千米 ， b 每 小时 走 12 千米 ， a ， b 两 人 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22045", "content": "一 件 商品 降价 20% 后 价格 是 1600 元 ， 这件 商品 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13754", "content": "我们 学校 有 84 个 篮球 ， 每班 借 6 个 ， 共有 8 个 班 ． 还 剩 多少 个 篮球 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16598", "content": "今年 3 月 1 日 起 ， 国家 对 个人所得税 进行 调整 ． 按照 规定 ， 每月 收入 超过 2000 元 的 ， 超过 部分 应 按 5% 的 税率 缴纳 个人所得税 ． 王老师 的 本月 工资 是 2350 元 ， 他 本月 应 缴纳 个人所得税 多少 元 钱 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11743", "content": "一 口 养鱼池 呈 长方体 ， 长 50 m ， 宽 46 m ， 深 2.5 m ， 平均 每 立方米 能 养 3 条 鱼 ， 这 口 养鱼池 一共 能 养 多少 条 鱼 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "16348", "content": "湖滨 公园 有 18 条 游船 ， 每天 收入 1008 元 ． 照 这样 计算 ， 现在 有 26 条 游船 ， 每天 增加收入 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8043", "content": "水果 店里 有 批 香蕉 ， 已经 卖 了 6 天 ， 每天 卖 37 箱 ， 还 剩下 15 箱 ． 这 批 香蕉 一共 有 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10319", "content": "一 台 录音机 售价 415 元 ， 一台 电视 的 售价 是 一台 录音机 的 4 倍 ． 买 一台 录音机 和 一台 电视 一 共用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14599", "content": "一 批 故事书 第一天 售出 44% ， 第 二 天 售出 160 本 ， 还 剩 120 本 ， 这 批 故事书 一共 有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21479", "content": "去年 新 一年级 招生 300 人 ， 今年 比 去年 增加 了 25% 招生 ， 今年 招生 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10553", "content": "李 亮 买 了 1000 元 的 国家 建设 债券 ， 定期 2 年 ， 到期 后 ， 他 得到 57.8 元 的 利息 ， 这种 建设 债券 年利率 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16158", "content": "电影院 开展 3 天 宣传 新片 活动 ， 原来 每张 票 定为 10 元 ， 现在 每张 定价 8 元 ， 活动 期间 共有 1325 人 观看 ， 共 收 多少 元 票 费 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6449", "content": "张 强 编写 的 书 在 出版 后 得到 稿费 1400 元 ， 稿费 收入 扣除 800 元 后 按 14% 的 税率 缴纳 个人所得税 ， 张 强 应该 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4091", "content": "一 节电池 扔 在 土 里 会 造成 190 平方米 的 土地 污染 ， 使 植物 无法 生长 ， 小 明 在 公园 的 草地 上 拾起 了 15 节 废电池 ， 共 可 减少 多少 平方米 土地 污染 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21583", "content": "一 个 圆柱形 水桶 的 容积 是 72 立方分米 ， 桶 底 的 面积 是 12 平方分米 ． 里面 装 了 (3/4) 桶 水 ， 水面 高 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17843", "content": "一 辆 汽车 从 甲地 到 乙地 共 行驶 10 小时 ， 每 小时 行 68 千米 ， 这时 距 乙地 还有 45 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16846", "content": "修 一条 路 ， 第一天 修 了 全路 的 (1/6) ， 第 二 天 修 了 余下 的 (1/4) ， 两天 共 修路 225 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3061", "content": "甲乙 两车 同时 从 相距 30 千米 的 两地 同时 出发 同 向 而 行 ， 乙 车 在 前 ， 每 小时 6 千米 ， 甲 车 在 后 行车 ， 每 小时 12 千米 ， 甲 经过 几小时 才能 追 上 乙 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18557", "content": "新 农村 建设 绿树 造林 ， 张家村 购进 一批 树苗 ， 这 批 树苗 的 成活率 在 70% - 80% ， 要 保证 成活 2800 棵 树苗 ， 最少 要 栽 多少 棵 树苗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20586", "content": "阿 建 暑假 旅游 时 拍 了 许多 照片 ， 回来 后 字 制作 了 相册 以 作 纪念 ， 他 分别 选 了 最 喜爱 的 2 张 照片 做 封底 、 封面 ， 其余 16 页 ， 每页 夹 4 张 照片 ， 阿 建 暑假 共 拍 了 几张 照片 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "381", "content": "明明 买 了 一条 鱼 ， 重 1.8 千克 ， 每千克 12.8 元 ， 店 主要 明明 付 25.4 元 ． 店主 算 得 对 ？ 为什么 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5745", "content": "妈妈 买 了 4 包 饼干 和 2 只 面包 ， 共用 了 13.2 元 ． 面包 每 只 1.8 元 ， 饼干 每包 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20182", "content": "一 列 客车 和 一列 货车 同时 从 两地 相对 开出 ， 4.5 小时 相遇 ， 客车 每 小时 行 65 千米 ， 是 货车 速度 的 1.3 倍 ， 两地 间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4932", "content": "一 只 乌龟 每分钟 可 爬 (4/5) 米 ， 爬行 (128/25) 米 的 路程 ， 这 只 乌龟 需 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13627", "content": "王大爷 今年 收 苹果 138 千克 ， 收 的 梨 比 苹果 的 5 倍 还 多 105 千克 ， 王大爷 收 梨 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7358", "content": "一 根 绳子 用 去 20% 后 接上 3.5 米 ， 结果 比 原来 还 短 4 米 ． 绳子 原来 长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19596", "content": "实际 投资 42 万元 ， 占 计划 投资 的 (6/7) ， 计划 投资 多少 万元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14377", "content": "服装厂 要 加工 80 套 服装 ， 已经 加工 了 45 套 ， 剩下 的 要 5 天 加工 完 ， 平均 每天 要 加工 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18840", "content": "3 只 燕子 5 天 吃 害虫 975 只 ， 平均 每 只 燕子 每天 吃 害虫 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1535", "content": "水泥厂 去年 生产 水泥 6000 吨 ， 比 前年 增产 25% ． 比 前年 增产 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "200", "content": "1999 + 999 ^ 2 ．", "knowledge": ["+", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "8345", "content": "昌盛 农场 要 收割 小麦 16.4 公顷 ， 已经 收割 了 3 天 ， 每天 收割 1.8 公顷 ． 如果 从 第 4 天 起 ， 每天 收割 2.2 公顷 ， 那么 ， 剩下 的 小麦 还 需 多少 天 收割 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22345", "content": "一 个 汽车 制造厂 今年 生产 一辆 汽车 平均 用 (3/40) 小时 ， 比 去年 缩短 (1/120) 小时 ， 去年 生产 一辆 汽车 平均 用 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7147", "content": "果园 里 栽 桃树 84 棵 ， 栽 桃树 的 棵 树 比 杏树 多 (3/4) ， 杏树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4902", "content": "一 瓶 油 倒 出 (1/4) 千克 ， 剩下 的 比 倒 出 的 多 (5/8) 千克 ， 这 瓶 油 原来 有 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13539", "content": "155 / 20 与 18 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13846", "content": "有 一种 收音机 ， 每 台 是 35 元 ， 现在 按 0.8 出售 ． 这种 收音机 现在 每 台 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4368", "content": "某 商店 新 进 64 件 儿童 羽绒服 ， 每件 进价 450 元 ， 售价 580 元 ， 扣除 其它 费用 785 元 后 ， 还 能 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12325", "content": "用 3 部 同样 的 收割机 5 天 可以 收割 62.4 公顷 小麦 ， 每 台 收割机 每天 收割 多少 公顷 小麦 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22922", "content": "一 架飞机 每 小时 飞 1200 千米 ， 一列 火车 的 速度 正好 是 飞机 速度 的 (1/6) ， 而 一辆 汽车 的 速度 相当于 火车 速度 的 (1/4) ． 这辆 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23161", "content": "外国语 小学 新 买进 一批 书 ， 已知 故事书 的 (2/3) 等于 文艺 书 的 (4/5) ， 故事书 60 本 ， 文艺 书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10731", "content": "一 种 mp3 ， 现在 的 售价 是 330 元 ， 比 去年 降低 了 170 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7424", "content": "施工队 要 修 一条 路 ， 原 计划 每天 修 360 米 ， 18 天 修 完 ， 实际 每天 修 432 米 ． 照 这样 计算 ， 修 完 这 条 路 需要 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16293", "content": "有 两根 木条 ， 甲 木头 比 乙 木条 长 (1/5) ， 已知 甲 木条 长 (6/7) 米 ， 比 乙 木条 长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21092", "content": "把 一个 圆柱体 平均 分成 若干份 切开 ， 拼成 一个 近似 的 长方体 ． 这个 长方体 的 底 面积 是 7 平方分米 ， 高 是 8 分 米 ， 圆柱体 的 体积 = 多少 立方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6905", "content": "某 房间 需要 刷 的 面积 为 80 平方米 ， 在 无 损耗 的 情况 下 ， 每平方米 需用 涂料 0.55 升 ， 如果 在 实际 粉刷 时 有 (1/10) 的 损耗 ， 刷 这 间 房间 需 多少 涂料 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20669", "content": "妈妈 买 了 1.2 千克 的 西红柿 ， 每千克 2.4 元 ． 妈妈 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16387", "content": "有 一桶 开水 ， 灌满 8 水壶 后 ， 还 剩下 (6/7) ， 如果 只 灌满 7 水壶 ， 桶 里 还 剩下 56 升 ， 每个 水壶 装 水 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22278", "content": "前轮 在 720 米 的 距离 里 比 后轮 多 转 40 周 ， 如果 后轮 的 周长 是 2 米 ， 求 前轮 的 周长 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12383", "content": "一 头 大象 重 4.2 吨 ， 是 一头 牛 的 14 倍 ， 牛 的 重量 = 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15338", "content": "a 是 60 ， a 的 (1/4) 正好 是 b 的 (1/7) ， b = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9546", "content": "水 结成 冰 ， 体积 比 原来 增加 了 (1/11) ， 冰 融化 成 水 ， 体积 比 原来 减少 多少 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4667", "content": "小 兰 一本 故事书 ， 每天 看 15 页 ， 看 了 8 天 只 看 了 这 本书 的 一半 ， 后来 她 每天 多 看 5 页 ， 问 小 兰 看 完 这 本书 看 了 多少 天 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4558", "content": "一 种 商品 原价 180 元 ， 现 降价 (1/4) 销售 ， 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13118", "content": "步行街 上 张灯结彩 ， 从 这 一头 到 那 一头 每隔 4 米 挂 着 一个 红灯笼 ． 步行街 全长 有 600 米 ， 一共 挂 了 多少 个 灯笼 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14414", "content": "甲 、 乙 两 人 的 年龄 比 是 3 ： 5 ， 乙 比 甲 大 8 岁 ， 甲 = 多少岁 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "777", "content": "一 袋 米 ， 吃 了 (1/5) ， 还 剩 36 千克 ， 吃 了 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9037", "content": "130 * 64 与 138 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11612", "content": "一 件 外套 ， 原价 240 元 ， 商家 搞 活动 ， 准备 0.85 出售 ， 现在 这件 外套 的 标价 应该 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3816", "content": "某 商店 运进 香皂 857 块 ， 卖出 569 块 ， 又 运进 300 块 ， 这时 商店 里 有 香皂 多少 块 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9087", "content": "工人 师傅 修 一条 路 ， 前 3 天 每天 修 25 米 ， 接下来 的 4 天 每天 修 80 米 ， 这 7 天 工人 师傅 共 修路 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16614", "content": "棉厂 甲乙 两个 车间 共有 210 人 ， 如果 从 乙 车间 调出 (1/10) 的 人数 到 甲 车间 ， 那么 现在 甲乙 两个 车间 的 人数 的 比 是 4 ： 3 ， 原来 乙 车间 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17200", "content": "买 5 支 同样 的 钢笔 用 了 10 元 钱 ， 每支 钢笔 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10107", "content": "兰兰 非常 喜欢 看 课外书 ． 兰兰 看 一本 160 页 的 故事书 ， 第一天 就 看 了 总 页数 的 20% ， 第一天 看 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6502", "content": "一 套 课桌椅 的 价格 是 320 元 ， 桌子 与 椅子 的 价格比 是 5 ： 3 ， 一张 课桌 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16144", "content": "有 一根 木料 ， 第一次 用 去 全长 的 (1/3) ， 第 二 次 用 去 全长 的 (1/4) ， 还 剩 3.5 米 ， 这根 木料 原 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15034", "content": "学校 体育组 买 了 8 个 篮球 和 20 个 足球 ， 一 共用 去 1140 元 ． 已知 每个 篮球 35 元 ， 那么 每个 足球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1783", "content": "同学 们 做 了 40 朵 红花 ， 还 做 了 4 束 黄花 ， 每 束 2 朵 ， 红花 的 朵 数 是 黄花 的 多少倍 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20123", "content": "校 篮球队 有 38 人 ， 足球队 人数 比 篮球队 多 18 人 ， 体操队 人数 是 足球队 人数 的 2 倍 ， 体操队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19688", "content": "一 个 圆柱形 玻璃杯 内 装 着 水 ， 水面 高 15 厘米 ， 从 里面 量 ， 玻璃杯 的 底 面积 是 50 平方厘米 ， 将 一个 底 面积 为 10 平方厘米 ， 高 17 厘米 的 长方体 铁块 垂直 放入 杯中 ， 这时 高 多少 厘米 ？ （ 水 未 溢出 ）", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12460", "content": "甲乙 两 人 共 加工 240 套 服装 ， 当 甲 加工 了 8 天 ， 乙 加工 了 5 天 ， 甲 正好 比 乙 多 加工 20 套 ， 已知 乙 的 工作效率 比 甲 高 20% ， 那么 这时 甲 加工 了 多少 套 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13031", "content": "一 段 布 剪 去 6 米 ， 正好 剪 去 这 段 布 的 (2/5) ， 这 段 布 还 剩 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7759", "content": "某 商场 购进 一批 电器 ， 每 台 电器 进价 230 元 ， 售价 250 元 ， 这 批 电器 全部 售完 后 赢利 680 元 ， 这 批 电器 有 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2709", "content": "书包 打 0.75 后 的 售价 是 48 元 ， 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21076", "content": "小 红 的 体重 是 30.5 千克 ， 爸爸 的 体重 是 小 红 的 2.4 倍 ， 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20226", "content": "40 米 的 (5/8) 刚好 是 50 米 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3262", "content": "甲乙 两地 相距 300 千米 ， 一辆 汽车 行 了 全程 的 (4/5) ， 行 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17046", "content": "4 天 看 完全 书 的 (1/5) ， 多少 天 可以 看 完全 书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13762", "content": "一 根 绳 长 20 米 ， 剪下 6 根 2.3 米 的 短 跳绳 后 ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1581", "content": "多少 比 15 的 3 倍 多 21 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14750", "content": "马 老师 买 6 个 篮球 和 9 个 足球 一 共用 了 229.5 元 ， 已知 每个 足球 11.5 元 ， 那么 每个 篮球 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8351", "content": "欢欢 读 一本 240 页 的 故事书 ， 第 1 天 读 了 全书 的 (1/3) ． 剩下 多少 页 没有 读 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21914", "content": "我 家养 了 6 只 兔子 ， 其中 有 2 只是 黑 兔 ， 4 只是 白兔 ． 每 只 白兔 又 生 了 3 只 小兔 ， 家 现在 一共 有 多少 只 兔子 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6324", "content": "筑路 队 修筑 一段 公路 ， 第一天 修 了 全部 的 (1/6) ， 第 二 天 修 了 全部 的 25% ， 还 剩 140 米 没有 修 ． 这 段 公路 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16808", "content": "妈妈 到 超市 买 苹果 用 去 21.86 元 ， 买 梨 用 去 19.38 元 ， 一 共用 去 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6104", "content": "某 游泳队 教练 在 游泳 训练 小结 中 写道 ： “ 本队 已有 96% 的 参加 训练 者 达标 ” ， 已知 这 一 数字 的 误差 为 0.5% ， 那么 参加 训练 者 至少 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14857", "content": "张 爷爷 家 有 48 只 鸭 ， 养 的 鸡 是 鸭 的 13 倍 ， 张 爷爷 家 的 鸡 和 鸭 一共 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13529", "content": "一 件 衣服 现在 的 售价 是 210 元 ， 比 原价 降低 了 (3/10) ， 这件 衣服 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12676", "content": "甲乙 两车 同时 从 相距 340 千米 的 两地 相向 而 行 ， 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 90 千米 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11114", "content": "甲 数 和 乙 数 的 比 是 5 ： 8 ， 乙 数 比 甲 数多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21614", "content": "一 辆 汽车 的 速度 是 60 千米 / 时 ， 是 骑 自行车 的 速度 的 4 倍 ， 这辆 汽车 行 5 小时 的 路程 ， 骑 自行车 需要 多长时间 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5290", "content": "12 个 0.5 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5437", "content": "某 工厂 5 月份 生产 汽车 300 万辆 ， 比 计划 增产 50 万辆 ， 比 计划 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19514", "content": "六b 班 有 18 名 男同学 ， 22 名 女同学 ． 男同学 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13923", "content": "甲乙 两地 相距 450 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 平均 每 小时 行 65 千米 ， 4 小时 后 还 剩 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8643", "content": "一 个 钢厂 今年 计划 产 钢 80000 吨 ， 比 去年 增产 (1/4) ． 去 年产 钢 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3683", "content": "一 根 木头 长 12 米 ， 锯 成 4 段 要 24 分钟 ； 如果 要 锯 成 6 段 ， 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13763", "content": "李 玲 和 王英 从 学校 到 科技馆 ， 每 分 走 105 米 ， 已经 走 了 48 分 ， 学校 到 图书馆 的 路程 是 6000 米 ， 他们 还要 走 多少 米 才 到达 科技馆 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14817", "content": "汽车 从 甲地 开往 乙地 ， 每 小时 行 65 千米 ， 行驶 4.5 小时 后 还 离 乙地 35 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8080", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第 1 小时 行 了 全程 的 25% ， 第 2 小时 行 了 50 千米 ， 两个 小时 一共 行 了 全程 的 45% ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2383", "content": "一 辆 汽车 要 走 540 千米 的 路程 ， 已经 走 了 3 小时 ， 每 小时 走 40 千米 ． 剩下 的 路程 每 小时 走 42 千米 ， 还要 走 多少 小时 才能 走 完 这 段 路 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5837", "content": "2 个 5 连乘 = ？ 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22504", "content": "王老师 给 32 位 小朋友 分 蛋糕 ， 每人 分 3 块 后 ， 还 剩 4 块 ， 王老师 原来 有 多少 块 蛋糕 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11339", "content": "一 辆 客车 与 一辆 货车 同时 从 甲 、 乙 两个 城市 相对 开出 ， 客车 每 小时 行驶 46 千米 ， 货车 每 小时 行驶 48 千米 ， 3.5 小时 两车 相遇 ． 甲 、 乙 两个 城市 的 路程 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14398", "content": "一 件 衣服 ， 按 获利 30% 卖出 ， 可 获利 60 元 ， 这件 衣服 的 卖价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2960", "content": "篮球 的 单价 是 120 元 ， 排球 的 单价 是 篮球 的 单价 的 (4/5) ， 足球 的 单价 是 排球 单价 的 (7/8) ， 一个 足球 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20200", "content": "李 文 看 一本 572 页 的 书 ， 第一天 看 了 总 页数 的 (2/11) ， 第 二 天 看 了 余下 的 (3/13) ， 还有 多少 页 未 看 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "16211", "content": "某 汽车 制造厂 上半年 生产 小汽车 15000 辆 ， 比 原 计划 多 生产 3000 辆 ， 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16198", "content": "实验 小学 5 （ 1 ） 班 共有 学生 45 人 ， 其中 男生 占 (3/5) ， 这个 班 有 女生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5090", "content": "元旦 即将来临 ， 学校 准备 在 教学大楼 的 顶部 前沿 从头到尾 每隔 5 米 插 上 一面 彩旗 ， 测 得 大楼 的 顶部 前沿 长 50 米 ． 学校 需要 买 多少 面 彩旗 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18674", "content": "计算 ： 99 * (5/8) - 0.625 * 68 + 6.25 * 0.1 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14525", "content": "再 一次 献爱心 活动 中 ， 一年级 同学 共 捐 了 350 本书 ， 二年级 比 一年级 多 捐 了 270 本书 ， 二年级 同学 捐 了 多少 本书 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9439", "content": "某 公司 接到 一批 电脑 显示器 的 定单 ， 原 计划 每天 生产 50 台 ， 12 天 完成 任务 ， 实际 每天 生产 60 台 ， 多少 天 可以 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7455", "content": "有 40 粒 玉米种子 ， 发芽率 是 95% ， 不 发芽 的 有 多少 粒 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21867", "content": "挖 一条 水渠 ， 第一天 挖 了 全长 的 (1/6) ， 第 二 天 挖 了 6.5 km ， 还 剩 全长 的 (2/5) 没有 挖 ， 这 条 水渠 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18085", "content": "甲 、 乙 两地 相距 100 千米 ， 一位 商人 从 甲地 去 乙地 ； 第一天 行 了 全程 的 了 (3/5) ， 第 二 天 行 了 剩下 的 (3/4) ， 行 了 两天 后 还 剩下 少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9659", "content": "甲 、 乙 两车 同时 从 相距 180 千米 的 两地 相对 开出 ， (4/3) 小时 后 两车 在 途中 相遇 ． 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13260", "content": "一 堆 水泥 用 了 15% 后 ， 又 用 去 了 4 吨 ， 还 剩下 45% 没有 用 ． 这 堆 水泥 原来 有 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16073", "content": "火车头 的 主动轮 的 直径 是 1.5 米 ， 如果 每分钟 转 350 周 ， 这个 火车头 每分钟 前进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14868", "content": "已知 15 米 布 可以 做 5 套 校服 ， 照 这样 计算 ， 27 米 布 可以 做 多少 套 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5911", "content": "一 张 长方形 的 纸 它 的 (1/9) 涂 红色 ， 它 的 (5/9) 蓝色 ， 没 涂色 部分 占 这 张 纸 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3400", "content": "一 份 稿件 ， 甲 单独 打 (1/2) 小时 打 完 ， 乙 单独 打 (1/3) 小时 打 完 ． 现在 甲 、 乙 两 人 合 打 多少 小时 打 完 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7231", "content": "1 里面 有 多少 个 4 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8094", "content": "今年 在 我国 一个 湖区 越冬 的 有 16 只 白鹤 ， 176 只 白天鹅 ， 一共 有 多少 只 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9800", "content": "学校 图书室 今年 新 增加 了 810 本 图书 ， 现在 要 将 这些 图书 平均 放到 3 个 书架上 ， 每个 书架 又 平均 分成 了 6 层 ， 每层 放 几本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17283", "content": "学校 运 来 1900 吨 水泥 ， 用 15 条 船 来 运 ， 平均 每 条 船 装 了 120 吨 ， 余下 的 用 汽车 运 ， 汽车 运 了 多少 吨 水泥 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10446", "content": "某地 平均 年 日照 1200 小时 ， 甲地 年 日照时间 是 它 的 (3/2) ． 甲地 年 日照时间 大约 多少 小时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8692", "content": "司机 王 叔叔 从 厦门 出发 到 福州 送货 ， 前 3 小时 的 速度 是 58 千米 / 小时 ， 后 2 小时 的 速度 是 45 千米 / 小时 ， 王 叔叔 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14183", "content": "一 根 钢管 ， 用 去 它 的 (3/4) 后 ， 还 剩下 6 米 ， 这根 钢管 原来 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19023", "content": "从 630 里 连续 减去 多少 个 42 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20112", "content": "同学 们 栽树 ， 四年级 栽 了 32 棵 ， 五年级 栽 的 棵 数 比 四年级 的 3 倍 多 7 棵 ． 五年级 比 四年级 多 栽 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15581", "content": "希望 小学 3 、 四年级 共有 学生 478 人 ， 其中 三年级 有 4 个 班 ， 平均 每班 52 人 ， 四年级 有 5 个 班 ， 平均 每班 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2482", "content": "菊花 电扇厂 要 加工 一批 零件 ， 第一天 加工 零件 261 件 ， 第 二 天 加工 余下 零件 的 (2/7) ． 这 两天 共 加工 这 批 零件 总数 的 一半 ． 则 这 批 零件 共有 多少 个 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3754", "content": "一 堆 煤 有 65 吨 ， 用 去 (2/5) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1486", "content": "水 结成 冰 后 体积 增大 (1/10) ， 一桶 30 升 的 水 完全 结冰 后 ， 体积 有 多少 立方分米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15734", "content": "修路 队 修 一条 公路 ， 第一周 修 了 (3/4) km ， 比 第 二 周 多 修 了 (1/6) km ， 两周 修 共 了 多少 km ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4910", "content": "黄豆 中 的 蛋白质 含量 约 占 36% ， 280 千克 黄豆 中 ， 蛋白质 约 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4916", "content": "果园 里 有 6 行 枣树 ， 每行 12 棵 ， 每棵 收 枣 15 千克 ， 一共 收 枣 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1497", "content": "3 支 钢笔 的 价钱 与 6 支 圆珠笔 的 价钱 相等 ． 每支 钢笔 8 元 ， 每支 圆珠笔 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8356", "content": "同学 们 做 了 3 种 不同 颜色 的 花 ． 每种 25 朵 ， 布置 教室 用 了 一些 后 ， 还 剩 28 朵 ． 布置 教室 用 去 多少 朵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5742", "content": "苹果 每 筐 重 45 千克 ， 桔子 每 筐 重 50 千克 ， 某 水果店 运 来 苹果 和 桔子 各 25 筐 ， 运 来 的 苹果 和 桔子 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3038", "content": "李 叔叔 原来 体重 80 千克 ， 坚持 体育锻炼 后 ， 体重减轻 了 5% ， 现在 李 叔叔 体重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12668", "content": "有 一桶 油 ， 第一次 用 去 20% ， 第 二 次 又 用 去 全 桶 的 (2/5) ， 两次 共用 去 6 千克 ， 这 桶 油 重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1523", "content": "某 小学 有 男生 138 名 ， 男生 人数 比 女生 的 少 (1/3) ． 女生 有 多少 名 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "856", "content": "猎豹 最快 时速 是 每 小时 113 千米 ， 马 最快 时速 是 每 小时 75 千米 ， 那么 ， 猎豹 最快 时速 比 马 最快 时速 快 多少 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12503", "content": "一 捆 电线 ， 用 去 全长 的 (3/5) ， 还 剩下 30 米 ， 这 捆 电线 全长 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18273", "content": "买 一台 电视机 用 去 了 32 张 100 元 的 人民币 ， 这 台 电视 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4092", "content": "由于 天气 突然 降温 ， 市 第一 人民 医院 这 几天 每日 大约 有 260 人 前来 就诊 ， 比 平时 人数 增加 了 30% ， 根据 这 条 新闻 ， 你 能 算 出 平时 每天 大约 多少 人 就诊 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21744", "content": "开开 家 本月 预算 电费 为 300 元 ， 实际 比 预算 节约 了 (2/15) ． 他家 这 月 实际 电费 几元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18892", "content": "一 种 药液 ， 药 与 水 的 比例 是 1 ： 100 ， 现在 有 4.5 克药 ， 需要 水 多少 克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8750", "content": "6 （ 2 ） 班 共有 50 名 同学 ， 今天 的 缺勤 率 是 4% ， 今天 到校 的 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23001", "content": "凤凰山 到 青山 溶洞 的 距离 是 240 千米 ， 大客车 每 小时 行 60 千米 ， 小轿车 每 小时 行 80 千米 ． 两车 同时 从 凤凰山 开往 青山 溶洞 ， 小轿车 比 大客车 提前 几小时 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12494", "content": "据统计 ， 2003 年 世界 人均 耕地面积 为 2500 m ^ 2 ， 我国 人均 耕地面积 仅 占 世界 人均 耕地面积 的 (2/5) ． 我国 人均 耕地面积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4017", "content": "我 把 3000 元 存入 银行 定期 2 年 ， 年利率 3.25% ， 到期 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8244", "content": "阳 澄 小区 有 48 幢 楼 ， 每 4 幢 楼 一排 ． 一共 有 几排 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11002", "content": "小 丽 跳绳 一分钟 能 跳 83 下 ， 哥哥 3 分钟 能 跳 273 下 ， 哥哥 比 小 丽 一分钟 多 跳 多少 下 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "220", "content": "甲 、 乙 两个 仓库 ， 已知 甲 仓库 存 粮食 300 吨 ， 如果 从 甲 仓库 取出 (3/10) 放入 乙 仓库 ， 两个 仓库 存粮 相等 ， 原来 甲 仓库 比 乙 仓库 多 多少 吨 存粮 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "19629", "content": "一 个 班 有 学生 48 人 ， 每人 至少 参加 跑步 、 跳高 两项 比赛 中 的 一项 ， 已知 参加 跑步 的 有 37 人 ， 参加 跳高 的 有 40 人 ， 那么 这两项 比赛 都 参加 的 学生 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4127", "content": "一 个 仓库 存粮 若干吨 ， 如果 运走 (2/5) ， 剩下 360 吨 ． 如果 运走 总数 的 (3/4) ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14770", "content": "小巧 去 商场 买 了 一支 圆珠笔 6 元 ， 又 买 了 一个 计算器 ， 它 的 价格 相当于 8 支 圆珠笔 的 价钱 ． 小巧 买 这样 两样 东西 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10933", "content": "一 辆 汽车 每 小时 行驶 65 千米 ， 从 甲地 到 乙地 行驶 14 小时 ， 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9646", "content": "把 (4/9) 米 平均 分成 3 份 ， 每份 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18500", "content": "印刷厂 要 印刷 4800 张 试卷 ， 印刷 了 (1/2) 小时 ， 完成 了 总数 的 (2/5) ， 照 这样 计算 ， 完成 全部 印刷 任务 共 要 多长时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15185", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/3) ， 如果 再 看 40 页 ， 那么 已经 看 的 与 剩下 的 比 是 5 ： 4 ． 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5422", "content": "修 一条 长 1500 米 的 公路 ， 已经 修 了 785 米 ， 剩下 的 5 天 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5185", "content": "东江 小学 五年级 有 128 人 ， 六年级 有 103 人 ， 学校 要 为 5 、 六年级 的 每个 同学 购买 一本 价格 为 15 元 的 《 名师 数学 指导 》 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6954", "content": "五年级 两个 班 参加 植树 活动 ， 一班 37 人 ， 共 植树 331 棵 ； 二 班 35 人 ， 平均 每人 植树 7 棵 ． 五年级 平均 每人 植树 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12580", "content": "一 个 修路 队 要 修路 760 米 ， 已经 修 了 280 米 ． 剩下 的 如果 每天 修 60 米 ， 还要 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1223", "content": "已知 水果 店里 有 苹果 40 千克 ， 梨 是 苹果 的 (3/4) ， 同时 梨 又 是 橘子 的 (6/7) ， 水果 店里 有 橘子 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16249", "content": "水果店 有 桔子 、 苹果 、 梨 共 320 千克 ， 其中 桔子 和 苹果 总 重 与 梨 重 比 是 11 ： 5 ， 桔子 重 是 苹果 的 (5/6) ， 则 苹果 有 多少 千克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16664", "content": "爸爸 买 了 一辆 价值 12 万元 的 家用轿车 ． 按规定 需 缴纳 10% 的 车辆 购置税 ， 爸爸 买 这辆 车 共 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22081", "content": "玲玲 集邮 62 张 ， 冬冬 集邮 的 张 数 是 玲玲 的 3 倍 少 17 张 ． 冬冬 集邮 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8076", "content": "老师 带 了 1200 元 ， 买 自行车 用 去 总 钱 数 的 (1/3) ， 买 微波炉 用 去 总 钱 数 的 (2/5) ． 刘老师 还 剩 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20525", "content": "新世纪 电影院 有 35 排座位 ， 每排 38 个 ． 扩建 后 将 有 40 排座位 ， 每排 有 45 个 ． 扩建 后 将 增加 多少 个 座位 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15207", "content": "希望 小学 四年级 学生 为 甘肃省 舟曲县 灾区 捐款 130 元 ， 五年级 捐 的 是 四年级 的 1.2 倍 少 25 元 ． 五年级 捐款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7369", "content": "“ 6 一 ” 儿童节 小 英 家用 8100 元 买 了 一架 新 钢琴 ． 妈妈 告诉 别人 说 ： “ 这 架 钢琴 降价 10% 后 我 才 买 的 ． ” 你 知道 这 架 钢琴 原来 卖 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17311", "content": "把 4 米 长 的 钢筋 平均 截 成 6 段 ， 每 段长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15206", "content": "红旗 自行车厂 去年 实际 生产 自行车 75 万辆 ， 比 原 计划 增产 (1/4) ， 原 计划 生产 自行车 多少 万辆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9910", "content": "妈妈 有 40 块 巧克力 ， 她 将 (3/8) 给 妹妹 ， 妹妹 又 把 自己 所得 的 (2/5) 送给 弟弟 ， 弟弟 得 几块 巧克力 ？ （ 提示 ： 用 分数 的 意义 解答 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20578", "content": "李 明 在 元旦 放假 3 天 中 ， 第一天 完成 了 所有 作业 的 (6/10) ， 第 二 天 完成 了 全部 作业 的 (3/10) ， 两天 一共 完成 了 全部 作业 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15408", "content": "商店 运进 一批 水果 ， 苹果 比 梨 的 (4/5) 多 20 千克 ， 已知 苹果 重 120 千克 ， 梨 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9735", "content": "小龙 的 身高 是 0.87 米 ， 小龙 的 爸爸 （ 詹 老师 ） 的 身高 是 他 的 2 倍 ， 詹 老师 的 身高 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17110", "content": "某校 合唱队 有 120 人 ， 比 去年 增加 了 (1/4) ， 去年 合唱队 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3063", "content": "小 李 和 小张 两 人 同时 同 地 相 背 而 行 ， 小 李 每 分 走 50 米 ， 小张 每 分 走 60 米 ． 走 了 10 分 的 时候 ， 小 李 停下来 休息 了 2 分 后 继续 走 ． 再 走 6 分 两 人 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "11090", "content": "甲 、 乙 两个 数 的 比 是 5 ： 9 ， 甲 数 是 10 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14790", "content": "一 块 菜地 共 1.8 公顷 ， 它 的 (1/3) 种 青菜 ， 其余 的 种 萝卜 和 菠菜 ， 种 萝卜 和 菠菜 的 面积 比 为 2 ： 1 ， 则 种 萝卜 多少 公顷 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20207", "content": "6 （ 1 ） 班 有 男生 21 人 ， 女生 比 男生 少 (1/7) ， 女生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15486", "content": "我们 羊场 小学 有 252 人 要 乘 6 辆车 去 幺 铺 小学 参加 6 一节 活动 ， 如果 每辆车 的 人数 相同 ， 每辆车 应 坐 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3841", "content": "自行车 车轮 的 外 直径约 0.75 米 ， 小 明 骑车 通过 一座 长 1884 米 的 大桥 时 ， 每分钟 车轮 转 50 周 ， 通过 这 座 大桥 共 需 多少 分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8725", "content": "某 工厂 生产 一批 玩具 ， 完成 任务 的 80% 后 ， 又 增加 了 280 件 ， 这样 还 需要 做 的 玩具 比 原来 的 多 20% ， 原来 要 做 多少 件 玩具 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2740", "content": "公园 、 学校 和 超市 刚好 在 同 一条 直 路上 ， 并且 公园 和 超市 分别 在 学校 的 东面 和 西面 ， 公园 到 学校 有 1200 ， 米 ， 超市 到 学校 的 路程 是 公园 到 学校 的 80% ． 公园 到 超市 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4650", "content": "某 工厂 老 、 中 、 青 工人 的 比 是 2 ： 5 ： 8 ， 老工人 比 青年工人 少 60 人 ， 中年 工人 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10105", "content": "小雪 家 南面 78 米 是 超市 ， 北面 689 米 是 学校 ， 早晨 小雪 从 家 出发 ， 先 到 超市 买 铅笔 ， 然后 去 学校 上学 ． 她 一共 走 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1616", "content": "由 数字 1 、 2 、 3 、 4 、 5 、 6 、 7 、 8 可 组成 多少 个 3 位数 ． （ 每个 数字 只用 一次 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10487", "content": "超市 运回 8 箱 牛奶 ， 每箱 有 24 袋 ， 每 袋 进价 1.25 元 ， 这些 牛奶 的 总 进价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5345", "content": "某 养鸡户 共养 大 母鸡 1140 只 ， 是 大公鸡 只 数 的 19 倍 ， 大公鸡 的 只 数 是 小鸡 只 数 的 (1/20) ． 养鸡户 共养 小鸡 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22114", "content": "1 + 2 + 3 + 4 + 5 + 6 … + 100 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21365", "content": "小 刚 在 商店 里 买 一个 练习本 和 一支 铅笔 ， 练习本 1.6 元 1 个 ， 铅笔 0.5 元 一支 ． 付给 售货员 5 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3504", "content": "25 * 125 * 96 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4111", "content": "小时 读 一本 童话 书 ， 原 计划 每天 读 16 页 ， 9 天 读完 ， 实际 6 天 就 读完 了 ， 实际 平均 每天 读 了 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14610", "content": "修路 队 计划 修路 4 千米 ， 已经 修 了 (3/5) ， 修 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9612", "content": "李 明 看 一本 970 页 的 书 ， 已经 看 了 42 页 ， 剩下 的 想 16 天 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6659", "content": "实验 小学 三年级 有 86 人 被 选中 去 参加 跳绳 比赛 ， 还 剩下 179 人 ， 你 知道 三年级 有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6169", "content": "阳阳 正在 读 一本 科普 书 ， 第一周 读 了 90 页 ， 还 剩下 这 本书 的 (1/3) 没有 读 ． 这本 科普 书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14528", "content": "妈妈 买 了 4 个 开水瓶 ， 给 营业员 50 元 钱 ， 找回 了 2 元 ， 每个 开水瓶 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17576", "content": "小 兰 今年 9 岁 ， 妈妈 今年 36 岁 ， 妈妈 和 小 兰 相差 多少岁 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15314", "content": "学校 开展 冬季 跳绳 比赛 ， 小 明 跳 了 180 个 ， 小强 跳 的 是 小 明 跳 的 (8/9) ， 小 亮 跳 的 是 小强 的 87.5% ， 小 亮 跳 了 几个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "435", "content": "某校 派出 两个 队 （ 每队 3 人 ） 参加 全市 小学 奥数 竞赛 ． 一队 的 平均分 是 75 分 ， 二 队 的 平均分 是 81 分 ． 两个 队 的 平均分 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16612", "content": "一 根 铁丝 截去 (1/4) 正好 截去 25 米 ， 这根 铁丝 原 长 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "328", "content": "250 - 170 与 80 的 和 ， 差 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15018", "content": "一 个数 的 (5/8) 是 4 ， 这个 数 的 (8/9) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11013", "content": "《 甜心 格格 》 这部 动画片 已经 播放 了 24 集 ， 用 了 528 分钟 ， 这部 动画片 每集 有 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12801", "content": "修路 队 修 一条 路 ， 第一天 修 了 全长 的 (1/6) ， 第 二 天 修 了 全长 的 (1/2) ， 还 剩 全长 的 几分 之 几 没 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12659", "content": "有 一种 铁丝 ， 8 米 长 重 2 千克 ， 现有 这种 铁丝 300 米 ， 一共 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1294", "content": "一 个 比例 的 两个 内 项 的 积 是 (2/5) ， 其中 一个 外 项 是 0.6 ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15251", "content": "一 个 零件 加工厂 有 34 名 老工人 和 102 名 新 工人 ． 一名 老工人 每天 加工 零件 24 个 ， 一名 新 工人 每天 加工 零件 18 个 ． 现在 共 加工 零件 21216 个 ． 需要 多少 天 才能 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4226", "content": "果园 里 有 苹果树 1800 棵 ， 比 桃树 的 2 倍 少 1000 棵 ． 有 桃树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4083", "content": "用 500 粒 种子 做 发芽试验 ， 发芽率 是 96% ， 有 多少 发 了 芽 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19679", "content": "某 商场 元旦 期间 ， 开展 促销 活动 ， 电炒锅 的 价格 为 228 元 ， 比 原价 降价 了 12 元 ， 降价 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11566", "content": "一 个 平行四边形 相邻 两边 的 长度 分别 是 5.4 cm 和 4.8 cm ， 量 得 它 的 一条 高 是 5 cm ， 这个 平行四边形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11154", "content": "已知 ab = 12 ， bc = 10 ， ad = 18 ， cd = 多少 （ a 、 b 、 c 、 d 均 为 自然数 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21778", "content": "小 红 每分钟 打 28 个 字 ， 小 青 每分钟 打 30 个 字 ， 两个 人 合 打 一篇 1566 个 的 稿件 ， 需要 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "373", "content": "王 飞 到 山上 图书馆 借书 ， 他 上山 每 小时 行 3 千米 ， 从 原 路 返回 ， 每 小时 行 6 千米 ． 求 他 上 下山 的 平均速度 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21256", "content": "《 中华人民共和国 国旗法 》 规定 ， 国旗 的 长 应 是 宽 的 1.5 倍 ． 开发区 小学 每周 升旗 的 国旗 长 是 1.44 米 ， 这 面 国旗 的 面积 = 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19038", "content": "市政工程 队 修 一条 公路 ， 已经 修好 了 60 千米 ， 占 全长 的 (3/5) ， 这 条 公路 全长 有 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13542", "content": "从 28 里 连续 减 多少 个 4 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5636", "content": "王庄村 要 修 一条 600 米 长 的 公路 ． 已经 修 了 168 米 ， 剩下 的 12 天 修 完 ， 平均 每天 修 了 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20846", "content": "王老师 买 了 1500 元 国家 建设 债券 ， 定期 3 年 ， 如果 年利率 3% ， 到期 时 他 可以 获得 本金 和 利息 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8564", "content": "一 个 篮球 的 价钱 是 120 元 ， 一个 排球 的 价钱 是 一个 篮球 的 价钱 的 (4/5) ， 一个 足球 的 价钱 是 一个 排球 价钱 的 (7/8) ， 一个 足球 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16589", "content": "某 食堂 ， 3 月 运入 大米 600 吨 ， 比 运入 的 蔬菜 的 (3/5) 少 6 吨 ， 运入 蔬菜 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13954", "content": "历史博物馆 成人 票 35 元 ， 儿童票 28 元 ． 某 学校 有 5 位 老师 带领 112 名 学生 参观 博物馆 ， 购买 门票 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "916", "content": "王老师 与 5 名 运动员 ， 如果 每 2 人 握 一次 手 ， 一共 握 了 多少 次 手 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9665", "content": "青山 小学 五年级 有 学生 76 人 ， 占 全校 总 人数 的 (2/15) ， 六年级 的 人数 是 全校 总 人数 的 (4/19) ， 六年级 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11822", "content": "甲 、 乙 两 人 从 两地 同时 相对 出发 ， 甲 每分钟 走 75 米 ， 乙 每分钟 走 80 米 ， 经过 18 分钟 相遇 ． 两地 相距 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6404", "content": "学校食堂 买 了 一批 大米 ， 第一次 吃 了 全部 的 一半多 2 千克 ， 第 二 次 吃 了 余下 的 一半 ， 这时 还 剩 20 千克 ， 这 批 大米 共有 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13913", "content": "7 米 的 (1/8) = 多少 的 (7/8) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20269", "content": "甲 、 乙 两 船 从 两个 港口 对 开 ， 甲 船 每行 小时 行 30 千米 ， 乙 船 每 小时 35 千米 ． 乙 船 开出 1 小时 后 ， 甲 船 才 开出 ， 再 经过 4 小时 两 船 相遇 ． 两个 港口 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21507", "content": "一 批 煤 420 吨 ， 烧 去 (2/7) ， 烧 去 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22292", "content": "一 个 果园 ， 今年 收 苹果 480 吨 ， 已 出售 (5/6) ， 还 剩 多少 吨 ？ ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1075", "content": "一 盆 鲜花 30 元 ， 花店 搞 促销 活动 ， 买 5 盆 送 一盆 ， 学校 文化 长廊 现 需要 44 盆 鲜花 ． 最少 多少 钱 可以 买来 这些 花 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18874", "content": "甲 仓库 有 化肥 30 吨 ， 乙 仓库 有 化肥 40 吨 ， 甲 仓库 的 化肥 比 乙 仓库 少 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7715", "content": "一 条 下水管 道 ， 计划 每天 安装 120 米 ， 15 天 完成 ， 实际 只用 了 10 天 就 完成 了 ． 实际 每天 安装 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2475", "content": "儿童节 童装 专柜 一律 降价 20% 销售 ． 妈妈 花 150 元 为 兰兰 买 了 一件 裙子 ， 这件 裙子 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21250", "content": "班级 进行 跳高 测验 ， 小 红 跳 了 1.33 米 ， 小 明 跳 得 比 小 红 高 0.15 米 ， 小 方 跳 得 比 小 明 低 0.05 米 ， 小 方 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18980", "content": "一 辆 大客车 上午 8 时 从 广州 出发 ， 上午 11 时 到达 珠海市 ， 这辆 车 共 行驶 了 多少 小时 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16060", "content": "在 一个 减法 算式 中 ， 如果 被减数 增加 70 ， 差 减少 20 ， 那么 减数 增加 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3917", "content": "原价 为 28 元 的 物品 ， 现 降价 (1/4) 出售 ， 则 现在 售价 为 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22073", "content": "一 种 服装 原价 280 元 ， 现在 降价 (2/8) ， 现在 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5323", "content": "赵 明 看 一 本书 ， 已经 看 72 页 ， 正好 是 这 本书 的 (8/9) ， 这 本书 共有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11621", "content": "小 刚 的 身高 比 小强 矮 (1/14) ， 小 刚 的 身高 是 小强 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4223", "content": "贝 贝 到 书店 买 笔记本 ， 买 5.9 元 一本 的 ， 差 0.6 元 ， 他 只好 买 4.8 元 一本 的 ， 剩下 的 钱 正好 买 了 一支 圆珠笔 ． 这 支 圆珠笔 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2430", "content": "爸爸 重 80 千克 ， 妈妈 的 体重 是 爸爸 的 (3/5) ， 小 明 的 体重 是 妈妈 的 (1/2) ， 小 明 体重 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11253", "content": "有 一班 同学 去 划船 ， 他们 算了 一下 ， 如果 增加 一 条 船 ， 每 条 船 正好 坐 6 人 ； 如果 减少 一条 船 ， 每 条 船 正好 坐 9 人 ． 这 班 有 多少 人 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22233", "content": "有 120 辆 汽车 ， 售出 30% ， 还 剩 多少 辆 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17189", "content": "一 项 工程 ， 甲 、 乙 合 做 每 小时 完成 全 工程 的 (1/6) ， 如果 甲 先 做 4 小时 ， 乙 再 做 3 小时 ， 还 剩 全 工程 的 (2/5) 没有 完成 ． 若 由 甲 独立 完成 该 工程 要 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "790", "content": "虾 每千克 21.5 元 ， 鱼 每千克 11.4 元 ． 妈妈 买 了 0.6 千克 虾 和 1 千克 鱼 ， 付出 30 元 ， 应 找回 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "6367", "content": "妈妈 上楼 的 速度 是 小 华 上楼 速度 的 2 倍 ， 她们 两 人 从 一楼 同时 开始 爬楼梯 ， 当 小 华 到达 4 楼 时 ， 妈妈 到达 多少 楼 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5123", "content": "11 + 22 + 33 + 44 + 55 + 66 + 69 = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "13084", "content": "344 里 有 多少 个 8 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13349", "content": "修 一条 公路 ， 总长 150 千米 ， 前 20 天 修 了 60 千米 ， 照 这样 计算 ， 还要 多少 天 可 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1678", "content": "水果店 购进 苹果 1000 千克 ， 运输 途中 碰坏 了 一些 ， 没有 碰坏 的 苹果 卖完 后 ， 利润率 为 40% ， 碰坏 的 苹果 只能 降低 出售 ， 亏了 60% ， 最后 结算 时 发现 总 的 利润 为 32% ， 问 ： 碰坏 多少 千克 苹果 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12207", "content": "小巧 家 买 了 一捆 电线 ， 长 30 米 ， 用 掉 一些 后 ， 又 送给 邻居 10.26 米 ， 结果 还 剩下 9.32 米 ， 问 用 掉 了 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10048", "content": "一 个数 的 (3/4) 是 (4/5) ， 这个 数 的 (3/8) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "251", "content": "乙 数 是 36 ， 甲 数 比 乙 数 的 (1/3) 多 6 ． 甲 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7415", "content": "一 根 绳子 剪掉 (1/6) ， 再 接上 60 米 ， 结果 比 原来 长 50% ． 绳子 原 长 多少 米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1191", "content": "游乐场 上午 有 游客 542 人 ， 中午 有 215 人 离去 ， 下午 又 来 了 458 人 ， 全天 游乐场 内 来 了 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10718", "content": "游泳池 里 有 45 名 学生 在 游泳 ， 其中 (3/5) 是 男同学 ． 男同学 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12675", "content": "买 一双 运动鞋 要 112 元 ， 小 明 付给 营业员 一张 100 元 和 一张 50 元 ， 营业员 应该 找 给 他 多少 元 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1570", "content": "王 伯伯 从 昆明 乘 特快 列车 去 武汉 用 了 14 个 小时 ， 特快 列车 1 小时 行 162 千米 ． 从 昆明 到 武汉 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5983", "content": "小 红 看 一本 200 页 的 故事书 已 看 页数 和 未 看 页数 的 比 是 3 ： 2 ， 已经 看 了 多少 页 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3913", "content": "一 批 零件 ， 原 计划 按 5 ： 3 分配 给 师徒 两 人 加工 ， 结果 师傅 加工 1200 个 ， 超过 分配任务 的 20% ， 而 徒弟 因 病 只 完成 了 他 原定 任务 的 60% ， 徒弟 实际 加工 了 多少 个 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "19461", "content": "商场 里 有 一批 货 ， 第一天 运走 了 总数 的 (1/4) ， 第 二 天 运走 了 总数 的 40% 多 4 吨 ， 这时 共 运走 了 56 吨 ． 这 批 货物 共 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17839", "content": "张师傅 家电 表 本月 示 数 为 2096.00 度 ， 上 月 示 数 1923.00 度 ， 电费 为 每 度 0.56 元 ， 由于 迟 几天 到 银行 交费 ， 又 要 交 违约金 2 元 ， 张师傅 这次 要 交 银行 多少 元 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17385", "content": "小 李 有 一本 80 页 的 故事书 ， 第一天 他 看 了 全书 的 35% ， 第 二 天 他 应该 从 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2846", "content": "一 本书 282 页 ， 小 辉 看 了 7 天 后 ， 还有 86 页 没 看 完 ， 小 辉 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18576", "content": "2 路 公共汽车 行驶路线 全长 10 千米 ， 相邻 两站 的 距离 是 1 千米 ， 一共 有 多少 个 车站 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11760", "content": "一 个 棱 长 4 分 米 的 正方体 的 食品盒 ， 如果 围着 它 贴 一圈 商标纸 （ 上 下面 不 贴 ） ， 这 张 商标纸 的 面积 至少 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8872", "content": "制作 一个 底面 直径 20 厘米 ， 长 50 厘米 的 圆柱形 通风管 ， 至少 要 用 多少 铁皮 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17387", "content": "甲 、 乙 两辆 汽车 同时 从 东西 两站 相对 开出 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 46 千米 ， 5 小时 相遇 ． 东西 两站 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6163", "content": "3 （ 1 ） 班 男生 人数 占 全班 人数 的 (3/5) ， 女 人数 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18406", "content": "两 人 同时 同 地 出发 前往 同一 目的地 ， 一 人 骑 自行车 ， 速度 是 18 千米 / 时 ， 一 人 骑 摩托车 ， 速度 是 自行车 的 2.5 倍 ， 2 小时 后 ， 骑 摩托车 的 人 到达 目的地 ， 那么 骑 自行车 的 人 还要 多久 才 到 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6333", "content": "甲 铁块 重 (5/6) 吨 ， 相当于 乙 铁块 的 (5/12) ． 乙 铁块 重 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14737", "content": "快餐店 有 2 个 素菜 和 3 个 荤菜 ， 按 “ 一 素 一 荤 ” 的 方法 配菜 ， 有 多少 种 不同 的 配菜 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21072", "content": "工厂 计划 用 煤 ， 某月 10 天 中 前 3 天 共用 138 万吨 ， 后 7 天 平均 每天 用 28.8 万吨 ． 工厂 平均 每天 用 煤 多少 万吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6993", "content": "一 本书 80 页 ， 小 明 每天 看 (1/10) ， 已经 看 了 5 天 ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18732", "content": "张 华 用 925 元 在 大明 药店 购买 了 25 盒 感冒 胶囊 ， 来到 医药 批发市场 了解 到 ， 批发价 每盒 30 元 ． 每盒 批发价 比 零售价 便宜 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19163", "content": "两地 相距 400 米 ， 两 人 从 两地 同时 出发 向 相反 的 方向 而 行 ， 5 分钟 后 两 人 相距 960 米 ， 甲 每分钟 走 50 米 ， 乙 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12903", "content": "在 一架 天平 上 ， 一边 放 上 一盒 玻璃球 ， 另一边 放 上 (1/4) 盒 玻璃球 和 9 个 50 克 的 砝码 ， 天平 是 平衡 的 ， 一盒 玻璃球 有 多重 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7398", "content": "售货员 小 李 粗心大意 ， 误 把 单价 为 13.2 元 的 钢笔 当作 12.3 元 出售 ， 一共 卖出 17 支 ． 请 帮 小 李 算 一 算 ， 她 一共 要 赔款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19380", "content": "92 * 98 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12863", "content": "某 工程队 修建 一条 9.6 千米 的 公路 ， 计划 30 天 可以 完工 ． 实际 每天 比 原来 少 做 0.02 千米 ， 实际 要 多少 天 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13902", "content": "岭南 小学 三年级 有 4 个 班 ， 每班 都 是 42 人 ． 如果 每人 都 从 图书馆 借 2 本书 ， 这个 年级 的 学生 一共 借书 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22017", "content": "果园 里 有 苹果树 236 棵 ， 梨树 的 棵 数 是 苹果树 的 5 倍 ， 梨树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22519", "content": "某 城市 平均 每天 产生 生活 垃圾 5768 吨 ， 一辆 卡车 可以 装 8 吨 生活 垃圾 ， 如果 要 一次 全部 运走 这些 生活 垃圾 ， 需要 多少 辆 这样 的 卡车 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "357", "content": "3 （ 4 ） 班 有 学生 55 人 ， 人人 订阅 报纸 ， 订 《 少年报 》 的 有 40 人 ， 订 《 小 主人 报 》 的 有 25 人 ， 那么 多少 人 订阅 两种 报纸 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10872", "content": "我校 去年 取暖 用 煤 150 吨 ， 比 前年 节约 (1/6) ， 前年 用 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12733", "content": "一 个 比例 里 ， 两个 内 项 互为 倒数 ， 其中 一个 外 项 是 (1/3) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4134", "content": "三年级 学生 参加 美术 兴趣小组 的 有 18 人 ， 参加 合唱组 的 是 美术组 的 3 倍 ， 合唱组 比 美术组 多 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13565", "content": "为了 庆祝 莲花县 “ 莲 文化节 ” ， 文广局 准备 定做 一批 灯笼 ． 原来 做 一个 灯笼 需要 3.6 元 的 材料 ， 后来 因为 改进 了 制作方法 ， 现在 做 一个 只要 3.2 元 的 材料 ． 原来 准备 做 160 个 灯笼 的 材料 ， 现在 可以 做 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9475", "content": "一 件 上衣 原价 100 元 ， 现价 80 元 ， 比 原价 降价 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17726", "content": "丽丽 在 期末 测试 中 ， 语文 、 数学 、 品德 与 生活 、 科学 、 英语 这 5 科 的 平均 成绩 为 92 分 ， 其中 前 4 门 学科 的 平均 分为 91 分 ， 她 英语 考 了 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15773", "content": "一 根 铁丝 第一次 用 去 全长 的 (2/9) ， 第 二 次 用 去 全长 的 (3/9) ， 这根 铁丝 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18086", "content": "一 枝 钢笔 5.60 元 ， 一个 文具盒 7.80 元 ， 小 丽 买 了 一枝 钢笔 和 一个 文具盒 ， 付出 15 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22248", "content": "新学期 学校 发 新书 ． 发给 24 个 班级 ， 每班 145 本 ， 还 多 40 本 ． 学校 买来 几本 新书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1293", "content": "小 福 奥数 考试 ， 一共 20 题 ， 每题 3 分 ， 错 一 题 或者 不 答 一 题 倒扣 2 分 ， 小 福 一共 得 了 45 分 ， 他 对 了 多少 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8281", "content": "一 本书 共 600 页 ， 小 新 第一天 看 了 全书 的 30% ， 第 二 天 看 了 全书 的 (1/2) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14490", "content": "小 红 和 小 明 在 环形 跑道 上 跑步 ， 两 人 从 同一 地点 同时 出发 ， 反向而行 ． 小 红 每 分 跑 220 米 ， 小 明 每分钟 跑 180 米 ， 经过 2 分钟 两 人 相遇 ． 跑道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13167", "content": "甲乙 两地 相距 1578 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 60 千米 ， 行 了 12 小时 ， 距 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21727", "content": "爸爸 买 了 一辆 价值 11 万元 的 家用轿车 ． 按规定 需要 缴纳 10% 的 车辆 购置税 ． 爸爸 买 这辆 车 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "850", "content": "三年级 男生 有 364 人 ， 女生 有 287 人 ， 已经 量 了 身高 的 有 396 人 ， 还有 多少 人 没有 量 身高 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13256", "content": "粮店 仓库 有 面粉 305 袋 ， 大米 的 袋 数 是 面粉 的 12 倍 ， 仓库 里 有 面粉 和 大米 共 多少 袋 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8022", "content": "小 明 和小红 都 有 30 本书 ， 小 明 送给 小 红 10 本 后 ， 小 红 比 小 明 多 多少 本 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6322", "content": "小 明 看 一 本书 ， 每天 看 18 页 ， 26 天 可以 看 完 ． 如果 每天 看 24 页 ， 要 看 多少 天 看 完 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3559", "content": "20 个 乒乓球 ， 拿走 它 的 (1/5) ， 还 剩 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4608", "content": "正方形 的 周长 增加 4 厘米 ， 它 的 边长 增加 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21291", "content": "公园 有 杨树 124 棵 ， 柳树 棵 数 是 杨树 的 4 倍 ， 杨树 和 柳树 共有 多少 棵 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20473", "content": "造纸厂 运进 煤 270 吨 ， 计划 烧 30 天 ． 实际 每天 用 煤 7.5 吨 ， 比 计划 节省 了 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1655", "content": "小 明 读 一本 128 页 的 书 ， 已经 读 了 80 页 ， 剩下 的 4 天 内 读完 ， 剩下 的 平均 每天 读 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20703", "content": "联想 电脑 现在 的 售价 是 原来 价格 的 (9/11) ， 正好 降低 了 1000 元 ， 现在 的 售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20585", "content": "一 辆 旅游车 在 一段 水平 路上 行驶 2 小时 ， 每 小时 行 53 千米 ； 然后 行驶 上坡路 ， 又 行 5 小时 ， 每 小时 行 30 千米 ； 最后 以 每 小时 40 千米 的 速度 上坡 ， 又 行 1 小时 到达 目的地 ． 旅游车 从 出发 到 抵达 目的地 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "17466", "content": "一 篇 论文 ， 李 叔叔 3 小时 录入 了 (1/3) ， 照 这样 的 速度 ， 工作 7 小时 ， 可以 录入 这 篇 论文 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6848", "content": "有 16 克 盐 ， 加多少 克 水 就 能 使 所得 盐水 的 含盐 率 是 40% ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7894", "content": "一 个数 的 25% 比 它 的 (1/5) 多 24 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "890", "content": "五年级 一共 有 学生 164 人 ， 其中 75% 的 同学 达到 国家 体育锻炼 标准 ， 达标 的 学生 有 多少 人 ？ ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14202", "content": "(1/3) + (1/5) + (1/7) + (1/19) + (1/1995) = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "1137", "content": "一 个 平行四边形 的 面积 是 70 平方厘米 ， 底 是 10 厘米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4906", "content": "幸福 小学 参观 “ 神舟 6 号 ” 飞船 科技成果 展览 ， 三年级 参加 了 45 人 ， 四年级 参加 的 人数 是 三年级 的 3 倍 ， 六年级 参加 的 人数 是 四年级 的 4 倍 ， 六年级 有 多少 人 参加 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7868", "content": "有 几位 同学 参加 语文 考试 ， 赵 峰 的 得分 如果 再 提高 13 分 ， 他们 的 平均分 就 达到 90 分 ， 如果 赵 峰 的 得分 降低 5 分 ， 他们 的 平均分 就 只得 87 分 ， 那么 这些 同学 共有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16942", "content": "食堂 运 来 面粉 0.9 吨 ， 运 来 的 大米 比 面粉 重量 的 4 倍 多 0.2 吨 ， 食堂 运 来 的 大米 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18717", "content": "王老师 每天 骑车去 上班 ， 每分钟 行 (4/15) 千米 ， 从 家 到 学校 共 (16/3) 千米 ， 需要 用 多少 分钟 才能 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1853", "content": "学校 要 为 25 名 教师 订购 服装 ， 一件 上衣 的 售价 是 265 元 ， 裤子 的 售价 是 135 元 ． 请 你 帮 校长 算 一 算 ， 购买 这 批 服装 一共 要 花 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6440", "content": "一 列 火车 长 200 米 ， 如果 整列 火车 完全 通过 一条 长 400 米 的 隧道 ， 需要 10 秒 ． 若 以 同样 的 速度 整列 火车 完全 通过 一座 大桥 需要 15 秒 ． 那么 ， 大桥 长 = 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22217", "content": "张 阿姨 看中 一套 套装 ， 原价 1800 元 ， 现 商场 0.8 酬宾 ， 张 阿姨 凭 贵宾卡 在 打折 的 基础 上 又 享受 10% 的 优惠 ， 买 这 套 套装 实际 付 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11376", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 (1/6) ， 第 二 小时 比 第一 小时 多行 了 24 千米 ， 这时 距离 乙地 还有 116 千米 ， 甲乙 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19139", "content": "小胖 2 小时 做 了 98 个 幸运星 ， 照 这样 计算 ， 要 完成 245 个 幸运星 ， 还 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7436", "content": "服装厂 运 来 500 米 的 布 ， 做 大人 衣服 用 去 275 米 ， 剩下 的 布 都 做 儿童服装 ， 每套 儿童服装 用布 3 米 ， 可以 做 多少 套 儿童服装 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13184", "content": "一 项 工程 ， 甲 做 了 它 的 (2/7) ， 乙 做 了 它 的 (1/3) ， 甲乙 两队 共 做 了 全 工程 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6070", "content": "学校 采用 单 场 淘汰制 举行 乒乓球 单打 比赛 ． 共 赛 了 10 场 决出 冠军 ． 则 应有 多少 名 选手 参加 比赛 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17101", "content": "学校 举行 “ 读 好书 ， 书香 满 校园 ” 知识 竞赛活动 ， 新 进 一批 图书 ． 其中 ， 科技 书 820 本 ， 故事书 的 本 数 是 科技 书 的 (2/5) ， 文艺 书 是 故事 书本 数 的 (7/8) ． 新 进 文艺 书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15032", "content": "9 个 班 共有 360 个 ， 平均 每个 班 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6305", "content": "学校 合唱团 在 演出 时 要 排成 3 个 方阵 ， 每个 方阵 有 3 排 ， 每排 有 30 人 ． 学校 合唱团 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19173", "content": "某 园林工程 队 在 一条 公路 边 修建 一条 绿化带 ． 第一周 修建 全长 的 (1/5) ， 第 二 周 修建 全长 的 (3/8) ， 修建 了 两周 后 ， 还 剩下 34 千米 没 修 ， 这 条 绿化带 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8171", "content": "运输队 第一天 运货 64.5 吨 ， 第 二 天运 的 是 第一天 的 3 倍 少 26 吨 ， 两天 一共 运货 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21593", "content": "一 条 路 第一天 修 了 (5/8) ， 第 二 天 修 了 (1/8) ， 还 剩 ( ( ( ) ) / ( ( ) ) ) 没 修 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18655", "content": "一 批 化肥 先 运走 25% ， 又 运走 18 吨 ， 这时 还 剩 45% 没有 运 ， 这 批 化肥 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14574", "content": "一 段 路程 长 120 千米 ． 第一天 行 了 全程 的 (1/4) ， 第 二 天 行 了 全程 的 (1/5) ， 两天 后 距离 终点 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14121", "content": "有 一位 外地 记者 买 一支 油笔 和 一支 钢笔 ， 油笔 的 价钱 是 (21/25) 元 ， 正好 是 钢笔 价钱 的 (2/3) ， 钢笔 的 价钱 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17231", "content": "两地 相距 96 千米 ， 甲乙 两车 同时 从 两地 相对 开出 ， (1/2) 小时 相遇 ． 甲 车 每 小时 行 54 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3619", "content": "小 玲 看 一本 故事书 ， 如果 每天 看 15 页 ， 8 天 能 看 完 ， 如果 每天 多 看 5 页 ， 几天 能 看 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8458", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 的 速度 是 63 千米 / 时 ， 共用 了 4 小时 ． 返回 时 只用 了 3 小时 ， 这辆 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6450", "content": "甲 、 乙 两地 相距 150 千米 ． 一辆 汽车 从 甲地 开往 乙地 ， 行 了 3 小时 后 ， 离 乙地 还有 15 千米 ． 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21226", "content": "一 条 公路 已经 修 了 350 千米 ， 剩下 的 比 已修 的 少 150 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20886", "content": "一 个 排球 的 价格 是 58.5 元 ， 而 一个 篮球 的 价格 是 排球 的 1.6 倍 ， 买 一个 篮球 和 一个 排球 共 需 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1453", "content": "一 根 木料 长 21 米 ， 把 它 锯 成 3 米 长 的 一段 ． 每 锯 一段 要 用 6 分钟 ， 共用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17094", "content": "汽车 从 甲地 到 乙地 ， 每 小时 行驶 80 千米 ， 6 小时 可以 到达 ． 从 乙地 返回 甲地 需要 8 小时 ， 返回 时 汽车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17995", "content": "杭州 到 上海 之间 将 开通 高速铁路 ， 开通 后 预计 可以 提速 150% 现在 沪 杭 铁路 之间 的 列车 时速 为 108 千米 ， 1 小时 40 分 可以 从 杭州 到达 上海 ， 高速 列车 开通 后 时速 将 达到 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6445", "content": "菜场 运 来 560 千克 白菜 ， 白菜 比 萝卜 多 (2/5) ． 萝卜 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9826", "content": "学校 图书馆 共有 850 本 图书 ， 借出去 了 283 本 ， 又 还 回来 了 158 本 ， 现在 图书馆 里 有 多少 本 图书 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11019", "content": "龙岗 果园 种 的 苹果树 是 梨树 的 (2/5) ， 是 桃树 的 (3/4) ， 果园 里 共 种 了 梨树 480 棵 ， 桃 树种 了 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1025", "content": "两地 相距 660 千米 ， 甲 车 每 小时 行 32 千米 ， 乙 车 每 小时 行 34 千米 ， 两车 分别 从 两地 同时 出发 相向 而 行 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21484", "content": "某 作家 收到 3000 元 稿费 ， 如果 超出 2000 元 部分 按 20% 的 税率 缴纳 个人所得税 ． 他 应该 交税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18715", "content": "几位 同学 一起 算 他们 语文 考试 的 平均分 ． 若 赵 峰 的 得分 提高 8 分 ， 则 他们 的 平均分 就 达到 90 分 ． 若 赵 峰 的 得分 降低 12 分 ， 则 他们 的 平均分 只有 85 分 ， 求 他们 实际 的 平均分 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5635", "content": "李 阿姨 到 电脑城 选购 电脑 ， 看 上 了 一台 标价 8000 元 的 4 核 新款 电脑 ， 李 阿姨 对 经理 说 ： “ 打 0.8 行 ？ ” 经理 想 了 想 说 ： “ 你 说 的 价格 再 加 5% 吧 ． ” 就 这样 ， 李 阿姨 买下 了 这 台 新款 电脑 ． 李 阿姨 买下 这 台 电脑 实际 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4360", "content": "老师 给 同学 们 买 了 6 个 铅笔盒 作为 运动员 奖品 ， 付 了 100 元 ， 找回 10 元 ， 每个 铅笔盒 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13132", "content": "希望 小学 三年级 学生 ， 27 名 去 采摘 西红柿 ， 平均 每人 摘 32 千克 ． 一共 摘 了 多少 千克 西红柿 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19510", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 的 速度 是 57 千米 / 时 ， 用 了 4 小时 ． 返回 时 只用 了 3 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9203", "content": "有 310 本书 ， 分给 15 个 班 后 ， 还 剩下 10 本 ， 平均 每个 班 分 多少 本 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17704", "content": "军 军 每天 骑 自行车 上学 ， 他 平均 每分钟 骑 208 米 ， 需要 骑 8 分钟 ． 军 军 家 离 学校 大约 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3077", "content": "小 明 家 距离 学校 768 米 ， 小 军 每天 上学 要 走 12 分钟 ， 照 这样 的 速度 ， 他 去 离家 1536 米 的 李 红 家 ， 要 走 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21388", "content": "飞行速度 最快 的 鸟 是 尖 尾 雨燕 ， 它 2 分钟 可 飞行 (16/3) 千米 ． 照 这样 计算 ， 尖 尾 雨燕 每分钟 能 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17458", "content": "某 乡镇 中学 开垦 了 一块 平行四边形 荒地 种 油菜 ， 这块 平行四边形 地 的 底 是 32 米 ， 高 是 35 米 ． 如果 平均 每平方米 收 油菜 1.5 千克 ． 这块 地 一共 收 油菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10976", "content": "为了 防治 病虫害 ， 需要 给 50 棵 小树 刷 石灰水 ． 如果 平均 每棵 树 的 直径 是 5 m ， 每棵 刷 0.5 米 ， 每平方米 需 石灰水 0.4 kg ， 一共 需 石灰水 多少 千克 ？ （ 得数 保留 一位 小数 ）", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "13405", "content": "同学 们 为 班级 图书 角 捐书 ， 故事书 有 252 本 ， 文艺 书 是 故事书 的 (5/6) ， 科技 书 是 文艺 书 的 (2/3) ， 捐 的 科技 书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17666", "content": "中国科学院 附属小学 的 同学 们 去 春游 ， 三年级 去 了 120 人 ， 四年级 去 的 人数 是 三年级 的 2 倍 ， 五年级 去 的 人数 比 3 、 四年级 的 总和 少 30 人 ， 五年级 去 春游 的 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2418", "content": "有 一种 雪糕 的 批发价 是 每 根 0.38 元 ． 王 叔叔 购进 30 根 这样 的 雪糕 ， 以 每 根 0.5 元 的 价格 卖出 ， 全部 卖完 可 得 毛利 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1346", "content": "修路 工人 修 一条 路 ， 已修 和 未 修 的 长度 比 是 5 ： 10 ， 如果 再 修 390 米 ， 已修 和 未 修 的 长度 比 是 2 ： 3 ， 这 条 路 有 多长 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19669", "content": "某 果园 免费 往 敬老院 运送 苹果 ， 运 去 了 8 筐 ， 平均 每 筐 重 150 千克 ． 该 果园 共 往 敬老院 运 了 多少 千克 苹果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17144", "content": "看 一 本书 ， 已 看 (1/3) 还 多 18 页 ， 余下 的 比 看 的 多 4 页 ， 这 本书 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "553", "content": "2.5 的 1.2 倍 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12845", "content": "张 大爷 买 3 只 小羊 用 了 75 元 ， 他 又 买 了 5 只 这样 的 小羊 ， 一共 花 了 多少 元 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18279", "content": "小 明 买 一套 服装 要 90 元 ， 上衣 与 裤子 的 价钱 比 是 5 ： 4 ， 买 一条 裤子 就 花 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4519", "content": "实验 小学 师生 参加 植树 活动 ， 30 人 0.5 小时 植树 180 棵 ， 照 这样 计算 ， 52 人 2 小时 植树 多少 棵 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6456", "content": "学校 买 15 盒 彩色 粉笔 ， 每盒 50 枝 ， 用 去 10 盒 ． 还 剩 多少 枝 没有 用 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4749", "content": "果园 有 梨树 310 棵 ， 苹果树 410 棵 ， 这 两种 树 相当于 所有 果树 棵 树 的 (8/9) ． 果园 里 一共 有 多少 棵 果树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3746", "content": "甲 、 乙 两队 要 挖 一条 水渠 ， 甲队 独 挖 要 15 天 完成 ， 乙 队 独 挖 要 12 天 完成 ． 现在 甲乙 两队 合 挖 了 4 天 ， 还 剩下 这 条 水渠 的 几分 之 几 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19583", "content": "兄弟两人 共有 储蓄 385 元 ， 其中 哥哥 占 (4/7) ． 哥哥 两次 取款 后 （ 弟弟 储蓄 没有 变 ） ， 他 的 储蓄 款 占 两 人 储蓄 总数 的 (3/14) ， 这时 兄弟两人 还有 存款 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8334", "content": "在 股票交易 中 ， 买进 必须 按 成交额 的 0.3% 交纳 印花税 ， 小 李 以 每股 10 元 买进 1000 股 科技股 ， 需要 交纳 印花税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16342", "content": "飞机 每 小时 飞行 715 千米 ， 是 汽车 每 小时 所 行 路程 的 13 倍 ， 飞机 比 汽车 每 小时 快 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8730", "content": "一 瓶 果汁 (3/2) 升 ， 用 (1/4) 升 的 杯子 来 盛 ， 能 盛 多少 杯 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15132", "content": "新民 村 今年 植树 2120 棵 ， 去年 比 今年 少 植树 380 棵 ． 两年 共 植树 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4704", "content": "4 个 同学 排队 接 水 ， 小 红 排 第一位 ， 她 接 水花 了 2 分钟 ， 她 后面 的 同学 一共 等待 了 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12417", "content": "一 批 零件 共有 5040 个 ， 王师傅 6 小时 做 了 全部 的 (3/4) ， 以 这样 的 速度 ， 还 需 几小时 才能 全部 做 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13525", "content": "一 本书 ， 已经 看 了 这 本书 的 (3/5) ， 还 剩下 150 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6258", "content": "幼儿园 买来 50 箱 酸奶 ， 每箱 8 杯 ， 每杯 酸奶 (7/25) 升 ． 这些 酸奶 一共 有 多少 升 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22423", "content": "某地 发生 了 严重 的 洪涝灾害 冲垮 了 道路 ， 工程队 急修 一条 长 7000 米 的 公路 ， 工作 了 3 天 ， 平均 每天 修路 800 米 ， 剩下 的 要 在 5 天 内 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20882", "content": "两队 合 修 一条 长 (8/9) 米 的 路 ， 甲队 修 了 全长 的 (1/9) ， 乙 队 修 了 全长 的 (1/3) ， 还 剩 这 条 路 的 多少 没 修 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5287", "content": "一 块 布 ， 做 上衣 用 去 (1/3) ， 做 裤子 用 去 (1/2) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18138", "content": "小 明 家 距离 学校 396 米 ， 小 军 每天 上学 要 走 12 分钟 ， 照 这样 的 速度 ， 他 去 离家 1551 米 的 李 红 家 ， 要 走 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18102", "content": "小 明 有 58 本 连环画 ， 小 明 给 小 红 5 本 后 ， 小 红 和 小 明 相等 ， 小 红 原来 有 多少 本 连环画 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12392", "content": "一 本书 看 了 它 的 (3/4) 还 剩 30 页 没有 看 ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11887", "content": "80 - 57 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1651", "content": "小 李 叔叔 开车 从 a 城 到 b 城 办事 ． 汽车 先 在 高速公路 上 行驶 了 2 小时 ， 每 小时 110 千米 ， 又 在 一般 公路 上 行驶 了 3 小时 ， 每 小时 45 千米 ， 到达 b 城 ． 从 a 城 到 b 城 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9466", "content": "在 捐款 活动 中 ， 第一 小组 有 12 人 ， 共 捐 560 元 ， 第 二 小组 8 人 ， 共 捐 860 元 ． 两个 小组 平均 每人 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7677", "content": "两辆 汽车 上午 8 时 从 a 、 b 两城 出发 ， 相向 而 行 ． 一辆 汽车 每 小时 行 55 千米 ， 另 一辆 汽车 每 小时 行 60 千米 ， 上午 11 时 辆车 相遇 ． a 、 b 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21414", "content": "红光 印刷厂 装订 一批 日记本 ， 前 3 天 共 装订 了 960 本 ， 后 16 天 平均 每天 装订 420 本 ． 这 批 日记本 共有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23026", "content": "一 支 钢笔 12 元 ， 一支 圆珠笔 8 元 ， 如果 学校 要 购买 钢笔 和 圆珠笔 各 20 支 ． 学校 买 钢笔 和 圆珠笔 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1142", "content": "华侨 小学 举行 广播操 比赛 ， 三年级 共有 189 人 ， 准备 9 人 站 一行 ， 一共 要 站 多少 行 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21084", "content": "一 个 修路 队 要 修 一条 路 ， 前 6 天 平均 每天 修 12.5 千米 ， 后 8 天 共 修 125.2 千米 ， 平均 每天 修路 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1528", "content": "生产 一种 玻璃杯 ， 采用 新工艺 后 ， 每 只 成本 降低 到 1.5 元 ． 现在 每 只 成本 比 原来 降低 了 37.5% ， 原来 每 只 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19779", "content": "从 5430 中 减去 15 ． 连续 减去 多少 次 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12269", "content": "工人 张师傅 7 分钟 做 了 56 个 零件 ， 李师傅 每分钟 比 张师傅 多 做 2 个 零件 ． 李师傅 每分钟 做 几个 零件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7668", "content": "光明 小学 有 男生 486 人 ， 女生 人数 是 男生 的 (5/6) ， 光明 小学 男生 比 女生 多 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2919", "content": "笋 晒成 笋干 ， 要 蒸发掉 大约 90% 的 水分 ． 小 明 妈妈 晒 180 千克 笋干 ， 大约 需要 多少 千克 笋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14134", "content": "野生 动物园 里 养 了 30 只 骆驼 ， 养 的 骆驼 的 只 数 比 长颈鹿 多 50% ， 长颈鹿 有 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7758", "content": "一 个 篮球 的 价格 是 120 元 ， 一个 排球 的 价格 是 一个 篮球 的 价格 的 (1/4) ， 一个 排球 的 价格 是 一个 足球 价格 的 (2/5) ， 一个 足球 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14967", "content": "一 份 稿件 共 4500 个 字 ， 李 阿姨 打 了 这份 稿件 的 (5/9) ， 还 剩下 多少 个 字 没有 打 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2024", "content": "从 甲地 到 乙地 有 3 条 路 可 走 ， 从 乙地 到 丙 地 有 4 条 路 可 走 ， 从 甲地 经 乙地 到 丙 地 共有 多少 种 走法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16161", "content": "把 一根 木头 锯 成 4 段 要 12 分钟 ， 锯 成 6 段 要 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3631", "content": "一 个 工程队 修筑 一条 15.8 千米 长 的 公路 ， 第一周 修 了 5 千米 ， 第 二 周 比 第一周 多 修 0.7 千米 ， 还要 修 多少 千米 才能 修 完 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22757", "content": "水果店 运进 3 筐 苹果 、 2 筐 桃 ． 苹果 每 筐 重 42 千克 ， 桃 每 筐 重 46 千克 ． 运进 的 苹果 和 桃 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5455", "content": "小 红 和 妈妈 去 商场 购物 ， 妈妈 花 了 75.2 元 ， 小红花 了 80.08 元 ， 一共 带 了 200 元 ， 剩余 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10760", "content": "商店 运进 一批 皮鞋 ， 第一天 卖出 了 总数 的 (1/3) ， 第 二 天 卖出 了 第一天 的 (3/5) ， 还 剩下 280 双 ， 商店 共 运进 皮鞋 多少 双 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12169", "content": "为了 响应 政府 “ 绿色 家园 ， 和谐 共建 ” 的 号召 ， 李 村 要 挖 一个 圆柱形 的 沼气池 ， 底面 半径 5 米 ， 深 2 米 ． 在 沼气池 的 侧面 和 下 底面 抹 上 水泥 ， 抹 水泥 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "22680", "content": "甲乙 两辆 汽车 分别 从 ab 两地 相对 而 行 ， 3 小时 后 两车 相遇 ， 这时 甲乙 两车 所 行 路程 的 比 是 7 ： 5 ， 甲 比 乙 多行 24 千米 ， ab 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21275", "content": "李 阿姨 买 了 4 箱 饮料 ， 每箱 有 12 瓶 ， 每瓶 2.5 元 ． 李 阿姨 一共 花 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11970", "content": "一 个 化工厂 原 计划 16 天 完成 一项 生产 任务 ， 由于 每天 多 生产 化工原料 3.6 吨 ， 结果 12 天 就 完成 了 生产 任务 ， 原 计划 每天 生产 化工原料 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11736", "content": "一 艘 轮船 每 小时 行 15 千米 ， 它 逆水 6 小时 行 了 72 千米 ， 如果 它 顺水 行驶 同样 长 的 航程 需要 几个 小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6414", "content": "一 本 故事书 有 120 页 ， 计划 8 天 读完 ， 实际 提前 2 天 就 读完 了 ． 实际 每天 多 读 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20366", "content": "某 工程队 第一个 月 安装 路灯 1200 盏 ， 第 二 个 月 安装 路灯 1300 盏 ， 此时 ， 还 剩 500 盏 路灯 未 安装 ， 那么 已 安装 路灯 的 总数 是 未 安装 路灯 数量 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2131", "content": "甲 、 乙 两地 相距 350 千米 ， 一辆 货车 和 一辆 客车 同时 从 两地 相向 开车 ， 经过 3.5 小时 相遇 ， 货车 每 小时 行 45 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6846", "content": "一 个 圆 的 半径 6 分 米 ， 如果 半径 减少 2 分 米 ， 周长 减少 多少 分 米 ．", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "15307", "content": "2.8 比 多少 的 5 倍 少 1.2 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14611", "content": "一 个 比 的 比值 是 (2/3) ， 如果 这个 比 的 前项 是 10 ， 那么 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7494", "content": "6 张 50 元 的 人民币 可以 兑换 多少 张 20 元 的 人民币 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10786", "content": "去年 植树节 ， 育才 小学 在 校园 里 植树 ． 树木 的 成活率 是 96% ， 在 所 栽 的 树木 中 没有 成活 的 有 24 棵 ， 去年 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20272", "content": "甲 ， 乙 两 同学 相距 1000 米 ， 同时 相向 而 行 ． 甲 同学 速度 为 3 米 / 秒 ， 乙 同学 速度 为 2 米 / 秒 ． 与此同时 ， 一只 小狗 以 6 米 / 秒 的 速度 ， 从 甲 身边 跑 向 乙 ， 遇到 乙 后 又 以 同样 的 速度 跑 向 甲 ， … 如此 往返 ， 直到 甲 、 乙 同学 相遇 ． 问 在 此 段时间 内 ， 小狗 共 跑 了 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9958", "content": "大象 重 2 吨 ， 鲸鱼 重 20 吨 ． 大象 是 鲸鱼 重量 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18036", "content": "东风 小学 五年级 有 学生 180 人 ， 比 六年级 人数 多 (1/8) ， 六年级 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20613", "content": "食堂 运进 面粉 150 千克 ， 运进 的 大米 比 面粉 的 2 倍 还 多 30 千克 ． 运进 面粉 和 大米 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21355", "content": "客船 和 货船 分别 从 相距 96 千米 的 甲乙 两个 港口 相对 而 行 ， 客船 每 小时 行 38 千米 ， 货船 每 小时 行 26 千米 ， 几小时 可以 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11622", "content": "同学 们 做操 ， 每行 站 24 人 ， 正好 站 15 行 ． 如果 每行 站 30 人 ， 可以 站 多少 行 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3348", "content": "某 工程队 修筑 一条 马路 ． 第一天 修 了 全长 的 (3/10) ， 第 二 天 修 了 全长 的 (2/5) ， 还 剩 630 米 没有 修 ． 这 条 马路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8011", "content": "小 明 家 到 学校 1800 米 ， 骑车 需要 6 分钟 ， 步行 需要 30 分钟 ． 一天 早上 他 先 骑车 ， 行 了 2 分钟 车轮 坏 了 ， 这时 他 只好 步行 去 学校 ， 还有 多少 分钟 才能 到 学校 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3293", "content": "某 手机 制造厂 第一周 生产 手机 570 部 ， 比 计划 多 生产 90 部 ， 超额完成 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6275", "content": "熊猫 的 体重 是 432 千克 ， 大象 的 体重 是 熊猫 的 8.6 倍 ， 大 像 有 多重 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17571", "content": "要 修 一条 长 2000 米 的 公路 ， 前 8 天 每天 修 150 米 ， 以后 如果 每天 修 160 米 ， 还要 多少 天 修 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16077", "content": "把 一个 长 、 宽 、 高 分别 是 7 cm 、 6 cm 、 5 cm 的 长方体 截 成 两个 长方体 ， 使 这 两个 长方体 的 表面积 之 和 最大 ， 这时 表面积 之 和 = 多少 cm ^ 2 ？", "knowledge": ["*", "+"], "difficulty": 0.8, "length": 19}
-{"question_id": "16726", "content": "小强 送给 妹妹 6 个 气球 后 ， 还 比 妹妹 多 2 个 ， 小强 原来 比 妹妹 多 多少 个 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8749", "content": "一 个数 的 (3/8) 是 48 ， 这个 数 的 (1/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1008", "content": "全班 共有 60 人 ， 参加 武术队 的 人数 占 全班 人数 的 (1/3) ， 参加 舞蹈队 的 人数 是 武术队 人数 的 (1/5) ． 参加 舞蹈队 的 同学 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7658", "content": "一 桶 油 倒 出 25 千克 ， 倒 出 (3/5) ， 倒 出 的 又 用 去 (1/5) ， 用 去 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14075", "content": "王师傅 2 小时 加工 零件 10 个 ， 平均 加工 一个 零件 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18987", "content": "军 军 有 309 张 画 ， 方方 有 196 张 画 ． 小 红 比 军 军 和 方方 的 总 张 数 少 254 张 ． 小 红 有 多少 张 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13733", "content": "学校 去年 购买 了 52 套 桌椅 ， 桌子 每张 80 元 ， 椅子 每张 25 元 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5824", "content": "配制 一种 盐水 ， 盐 和 水 的 重量 比 是 1 ： 2 ， 盐 是 盐水 重量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1948", "content": "有 一款 手机 现价 1500 元 ， 比 原来 降价 了 60% ， 这 款 手机 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22700", "content": "甲乙 两艘 军舰 不停 地 往返 于 两个 军事基地 之间 巡逻 ． 甲 舰 时速 12 千米 ， 乙 舰 时速 9 千米 ， 两 舰 从 两个 基地 同时 相向 出发 ， 第一次 相遇 时 恰巧 用 了 6 小时 ． 这 两个 军事基地 之间 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6520", "content": "某 厂 的 机修车间 ， 技术革新 后 加工 一个 零件 只 需 18 分 ， 比 原来 缩短 了 40% ． 原来 加工 一个 零件 需要 多少 分 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22712", "content": "小 军 有 13.5 元 ， 小 丽 有 28.6 元 ， 两 人 准备 买 一副 羽毛球拍 ， 还 剩 3.2 元 ， 这 副 球拍 多少 元 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10531", "content": "“ 5 一 ” 节 国货 商场 衣服 柜台 ， 所有 衣服 打 0.65 出售 ， 小 华 买 了 一套 衣服 花 了 227.5 元 ， 这 套 衣服 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21619", "content": "雷声 在 空气 中 的 传播速度 是 0.33 千米 / 秒 ， 要 下 阵雨 ， 贝 贝 看见 远处 有 闪电 ， 5 秒 后 听到 了 雷声 ， 闪电 的 地方 距 贝 贝 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19881", "content": "昨天 某班 有 48 人 到校 ， 出勤率 为 96% ， 请问 昨天 该班 有 多少 人 没有 到校 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12066", "content": "某种 商品 的 标价 为 120 元 ， 若 以 标价 的 90% 降价出售 ， 仍 相对 于 进货价 获利 20% ， 则 该 商品 的 进货价 = 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5510", "content": "一 顶 帽子 原价 18 元 ， 现在 降价 10% ， 这 顶 帽子 现价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10740", "content": "玉林 汽车站 到 南宁 琅 东站 全长 230 千米 ， 一辆 货车 从 玉林 以 每 小时 60 千米 的 速度 先行 了 1.5 小时 ， 再 以 70 千米 的 速度 行 余下 的 路程 ， 还 需 多少 小时 才能 到达 南宁 琅 东站 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21700", "content": "(3/5) 的 倒数 与 (1/2) 的 倒数 的 和 除以 (1/4) 的 倒数 ， = ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10231", "content": "两 汽车 从 相距 525 千米 的 两地 同时 相对 开出 ， 甲 车 每 小时 行 84.5 千米 ， 乙 车 每 小时 行 65.5 千米 ， 经 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19112", "content": "甲 数 比 乙 数 大 5.5 ， 甲 数 是 13.6 ， 乙 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3716", "content": "某 工厂 去年 计划 产值 2400 万元 ， 采用 新 设备 后 ， 实际 产值 比 计划 增长 (3/5) ， 实际 产值 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4847", "content": "一 辆 汽车 4 小时 行 了 200 千米 ， 照 这样 的 速度 再行 3 小时 ， 一共 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21774", "content": "某 公司 职工 参加 了 平安保险 ， 全 公司 交纳 10920 元 保险费 ， 如果 每人 保险金额 都 是 15000 元 ， 保险 率 都 是 0.1% ， 这个 公司 共有 多少 人 参加 保险 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10875", "content": "小 红 妈妈 买 了 2000 元 国家 建设 债券 ， 定期 3 年 ， 如果 年利率 是 6.15% ， 到期 时 她 可以 获得 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6765", "content": "玩具 商店 上午 卖出 玩具 汽车 18 辆 ， 下午 卖出 同样 的 玩具 汽车 32 辆 ， 下午 比 上午 多 卖 128.8 元 ． 每辆 玩具 汽车 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14949", "content": "生物 小组 进行 玉米种子 发芽试验 ， 有 285 粒 种子 发芽 ， 发芽率 是 95% ， 这次 有 多少 粒 种子 试验 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8881", "content": "数学 竞赛 共 10 道 ． 每 做 对 道 得 8 分 ， 做 错 一道 倒扣 5 分 ， 小 秀 得 了 41 分 ， 她 做 对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12930", "content": "食堂 张 叔叔 在 菜市场 买 了 3.5 千克 豆角 交给 售货员 10 元 ， 找回 3.7 元 ， 每千克 豆角 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6298", "content": "南阳 饭店 9 月份 的 营业额 为 250000 元 ， 纳税 后 剩 237500 元 ． 这个 饭店 是 按 怎样 的 税率 纳税 的 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21684", "content": "修路 队 修 一条 公路 ， 第一天 修 了 3.4 千米 ， 比 第 二 天 多 修 了 0.6 千米 ， 两天 共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2770", "content": "草场 村 计划 修 一条 公路 ， 原 计划 每天 修 0.26 千米 ， 实际 每天 比 计划 多 修 0.04 千米 ， 修 了 30 天 后 ， 还 剩下 1.2 千米 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2971", "content": "甲乙 两个 仓库 ， 甲 仓库 存粮 30 吨 ， 如果 从 甲 仓库 中 取出 (1/10) 放入 乙 仓库 ， 则 两 仓库 存粮 数 相等 ． 乙 仓库 原来 存粮 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6087", "content": "果园 里 有 桃树 368 棵 ， 梨树 比 桃树 的 5 倍 还 多 46 棵 ， 梨树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5000", "content": "小 青 用 一些 钱 的 (2/7) 买 钢笔 ， 再 用 剩下 的 (1/5) 买 笔记本 ， 最后 还 剩 这些 钱 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9899", "content": "在 算式 □ / 7 = 8 … 多少 中 ， 当 余数 是 5 时 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18564", "content": "一 种 皮衣 降价 100 元 后 售价 400 元 ， 降价 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14347", "content": "一 段 路 长 236 米 ， 小 乌龟 前 5 分钟 爬 了 52 米 ， 后来 每分钟 爬 8 米 ， 小 乌龟 爬 完 这 段 路 总共 需要 几分钟 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19750", "content": "同学 们 排队 做操 ， 小 红 前面 站 6 个人 ， 小 红 后面 站 9 个人 ， 这 一队 一共 有 多少 个人 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5789", "content": "工程队 要 铺 一条 长 20 米 的 煤气管道 ， 每天 铺 2 米 ， 已 铺 了 7 天 ， 照 这样 计算 ， 还要 铺 多少 天 才能 铺 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14491", "content": "六年级 有 男生 120 人 ， 女生 比 男生 少 10% ， 六年级 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7022", "content": "一 个 小组 有 6 个 学生 ， 期末考试 中 ， 小 红 因 病 缺考 ， 这 5 名 考生 平均分 是 89 分 ， 小 红 补考 得 了 95 分 ， 这个 小组 期 未 考试 平均 分数 = 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20343", "content": "(11/15) + (3/15) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8082", "content": "一 根 铁丝 截去 它 的 20% 后 还 剩 4 米 ， 这根 铁丝 原来 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1036", "content": "90 与 (7/15) 的 积 减去 4 / (8/17) 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3148", "content": "河里 有 大 鸭 和 小鸭 共 84 只 ， 有 大 鸭 56 只 ， 有 小鸭 多少 只 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14004", "content": "游乐场 的 套票 原来 每套 30 元 ， “ 十一 ” 期间 0.9 优惠 ， 优惠 后 的 套票 价格 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3573", "content": "“ 乐乐 ” 水果 店里 运 来 200 千克 苹果 和 一些 梨 ， 先 卖出 25 千克 的 苹果 ， 又 卖出 20 千克 的 梨 ， 这时 所剩 的 苹果 和 梨 同样 多 ， 水果店 运 来 多少 千克 梨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6229", "content": "一 位 农民 伯伯 买 了 一台 彩色 电视机 ， 由于 享受 了 13% 的 政府 补贴 ， 实际 只 付 1740 元 ， 这 台 彩电 的 标价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9928", "content": "用 22 元 买 2 千克 奶糖 ， 用 8 元 买 1 千克 水果糖 ， 两种 糖 混合 后 ， 每千克 价值 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15085", "content": "一 个 长方体 的 棱 长 总和 是 48 厘米 ， 长 是 5 厘米 ， 宽 是 4 厘米 ， 它 的 高 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14320", "content": "一 台 拖拉机 每 小时 耕地 (5/7) 公顷 ， 5 台 拖拉机 工作 (28/5) 小时 ， 一共 耕地 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18091", "content": "甲 数 是 80 ， 是 乙 数 的 4 倍 ， 甲 数 比 乙 数多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20616", "content": "一 本书 共有 144 页 ． 女孩 8 天 就 看 完 了 ． 男孩 准备 12 天 看 完 ， 女孩 比 男孩 平均 每天 多 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11373", "content": "张 强 编写 的 书 在 出版 后 得到 一笔 稿费 ， 这笔 稿费 收入 扣除 1200 元 后 ， 按 14% 的 税率 缴纳 个人所得税 280 元 ， 张 强 编写 的 这 本书 原来 的 稿费 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15525", "content": "除数 是 589 ， 商 是 56 ， 余数 是 586 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11972", "content": "化肥厂 计划 36 天 生产 化肥 540 吨 ， 实际 每天 多 生产 5 吨 ， 实际 需要 几天 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6184", "content": "甲 、 乙 两辆 汽车 同时 从 两地 相对 开出 ， 经过 8 小时 相遇 ， 相遇 时 甲 车 正好 行 了 全程 的 (3/5) ， 两车 相遇 后 ， 乙 车 还要 行 几小时 才能 行 完全 程 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6021", "content": "服装厂 购买 一批 布 ， 原来 做 一件 婴儿 衣服 需要 0.8 米 ， 可以 做 720 个 ． 后来 改进 技术 每件 节约 用布 0.2 米 ， 这 批 布 现在 可以 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19308", "content": "元旦 放假 ， 小雨 在 家里 学 做饭 ． 她 择菜 8 分钟 ， 洗菜 5 分钟 ， 淘米 2 分钟 ， 煮饭 要 20 分钟 （ 用 电饭煲 ） ， 切 要 4 分钟 ， 炒菜 6 分钟 ． 做 完 这些 事情 至少 需要 多少 分钟 ？", "knowledge": ["+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "22212", "content": "一 堆 煤 有 5 吨 ， 运走 (1/5) 吨 ， 还 剩下 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8457", "content": "3 （ 1 ） 班 有 女生 22 人 ， 男生 比 女生 多 3 人 ， 一共 有 学生 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2180", "content": "一 批 水泥 ， 用 去 12 吨 ， 剩下 的 是 用 去 的 (5/9) ， 这 批 水泥 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19958", "content": "果园 里 有 荔枝树 240 棵 ， 龙眼树 是 荔枝树 的 (4/3) ， 龙眼树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4355", "content": "一 本 故事书 565 页 ， 小林 看 了 3 天 ， 平均 每天 看 105 页 ， 还有 多少 页 没有 看 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3774", "content": "新学年 学校 买来 单人 课桌椅 共 52 套 ． 每张 桌子 66 元 ， 每 把 椅子 34 元 ， 学校 买单 人 课桌椅 一 共用 去 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7577", "content": "学校 把 植树 任务 按 3 ： 5 分配 给 五年级 和 六年级 ． 六年级 实际 植树 156 棵 ， 相当于 它 原 分配任务 的 120% ． 原 计划 五年级 植树 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "8226", "content": "10 只 小鸭子 站 成 一排 ， 每 两只 小鸭子 中间 站 一只 大 鸭子 ， 大 鸭子 有 多少 只 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2201", "content": "商店 卖出 面粉 200 千克 ， 卖出去 的 大米 是 面粉 的 4 倍 ， 面粉 和 大米 一共 卖出 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12527", "content": "同学 们 拍球 ． 小 军 拍 了 108 下 ， 小 红 比 小 军 多 拍 了 47 下 ， 小 方 比 小 红 少 拍 13 下 ． 小 方 拍 了 多少 下 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14427", "content": "一 列 火车 从 武汉 开往 北京 ， 行 了 全程 的 (9/13) 后 ， 又 以 每 小时 90 千米 的 速度 行 了 4 小时 才 到达 北京 ， 从 武汉 到 北京 全长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10139", "content": "成龙 一次 演出 收入 10 万元 ， 按规定 必须 按 20% 缴纳 个人所得税 ． 成龙 这次 演出 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21997", "content": "18 的 (5/6) / (1/4) 的 12 倍 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4298", "content": "320 / 8 的 商 = 多少 位数 ， 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22472", "content": "一 件 儿童 上衣 50 元 ， 一条 长裤 比 上衣 便宜 13 元 ， 一条 裙子 又 比 长裤 贵 8 元 ． 这 条 裙子 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2061", "content": "“ 火把节 ” 期间 ， 商家 搞 促销 活动 ， 某 品牌 洗衣机 的 价格 从 2000 元 降到 1100 元 ， 价格 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14381", "content": "刘 志 新 身边 的 钱 能 买 12 枝 钢笔 ， 没过几天 ， 钢笔 涨价 了 ， 原来 买 3 枝 钢笔 的 钱 现在 只能 买 2 枝 了 ， 那么 刘 志 新 的 钱 还 能 买 几枝 钢笔 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7957", "content": "世界 上 最小 的 鸟 是 蜂鸟 ． 一只 麻雀 的 体重 比 蜂鸟 的 50 倍 多 1 克 ． 一只 麻雀 重 106 克 ， 一只 蜂鸟 的 体重 = 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13352", "content": "水果店 运进 160 千克 苹果 ， 运进 的 梨 比 苹果 少 37.5% ， 运进 多少 千克 梨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4851", "content": "甲 、 乙 两个 车间 共同 加工 一批 零件 ． 已知 甲 车间 生产 零件 数 的 (1/3) 与 乙 车间 生产 零件 数 的 (2/5) 相等 ． 完成 任务 时 ， 乙 车间 共 生产 零件 900 个 ， 甲 车间 共 生产 零件 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10714", "content": "一 个 圆形 花坛 的 半径 是 3 m ， 如果 将 这个 花坛 的 半径 增加 1 m ， 面积 就 会 增加 多少 m ^ 2 ．", "knowledge": ["*", "+", "-", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "20127", "content": "琳 琳 和 贝 贝 进行 踢毽子 比赛 ， 贝 贝 每 分 踢 90 下 ， 琳 琳 每 分 踢 的 比 贝 贝多 (1/5) ． 琳 琳 每 分 比 贝 贝多 踢 多少 下 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18989", "content": "东关 小学 体育 队 有 71 人 ， 其中 篮球队 有 15 人 ， 田径队 的 人数 是 篮球队 的 2.4 倍 ， 其余 的 是 足球 队员 ． 足球队 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11637", "content": "小 明 买 一 本书 原价 2.85 元 ， 书店 按 原价 0.8 卖 给 小 明 ， 小 明 付 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14055", "content": "两辆 汽车 同时 从 相距 250 千米 的 两地 相对 开出 ， 经过 2.5 小时 后 ， 还 相距 25 千米 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11958", "content": "为 庆祝 “ 7 • 一 ” ， 4 （ 一 ） 班 同学 准备 把 教室 装扮 一下 ． 他们 要 在 教室 的 两边 每隔 1 米 挂 一个 灯笼 （ 两端 也 要 挂 ） ， 班长 量 出 教室 长 8 米 ． 他们 共 需 买 几个 灯笼 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22874", "content": "一 套 运动服 标价 850 元 现 打 0.85 出售 这 套 运动服 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18774", "content": "一 块 地 的 (5/8) 种 白菜 ， 其余 的 种 萝卜 ， 白菜 地 比 萝卜 地 多 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8569", "content": "小 新 在 做 一道 数学题 时 ， 错 把 第 二 个 因数 56 看成 了 58 ， 结果 比 原来 的 结果 多出 了 22 ， 请问 正确 结果 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2930", "content": "(6/7) 千克 的 (1/2) = 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14792", "content": "在 一个 直径 10 厘米 的 圆 中 ， 截取 掉 一个 最大 的 正方形 后 ， 剩下 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.7, "length": 17}
-{"question_id": "11437", "content": "幼儿园 买来 了 一些 糖果 ， 第一次 吃 它 的 (1/5) ， 第 二 次 比 第一次 少 吃 了 这些 糖果 的 (1/6) ， 两次 一共 吃 了 这些 糖果 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23008", "content": "一 个 工厂 原有 个人 40 人 ， 由于 提高 设备 ， 需要 精简 工人 5 名 ， 精简 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2386", "content": "甲 、 乙 合 做 一件 工作 ， 甲 做 的 部分 占 乙 的 (2/5) ， 乙 做 的 占 全部 工作 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6245", "content": "100 是 (1/100) 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21625", "content": "给 一间 房子 铺 边长 为 4 分 米 方砖 要 250 块 ， 若 改用 边长 为 5 分 米 的 方砖 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22567", "content": "甲乙 两地 相距 800 千米 ， 一辆 汽车 8 小时 行 了 全程 的 (4/5) ， 行 完全 程 要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9574", "content": "图书馆 有 500 本 图书 ， 第一次 借出 80 本 ， 第 二 次 借出 200 本 ， 还 回 40 本 ， 这时 图书馆 存有 新书 多少 本 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "365", "content": "小熊猫 体重 125 千克 ， 小老虎 体重 比 小熊猫 多 55 千克 ， 小老虎 体重 多少 千克 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5498", "content": "一 个 修路 队 已经 修 了 315 米 的 路 ， 剩下 的 打算 5 天 修 完 ， 平均 每天 修 94 米 ． 这 条 路 一共 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18418", "content": "修路 队 修 一条 公路 ， 第一天 修 了 3.56 千米 ， 比 第 二 天 多 修 了 0.78 千米 ， 两天 共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3813", "content": "1 里面 有 多少 个 (1/6) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20997", "content": "淘气 要 到 邮局 汇 1000 元 钱 给 住 在 家乡 的 奶奶 ． 按规定 汇费 是 汇款 额 的 1% ， 淘气 一共 要 交给 邮局 营业员 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11384", "content": "商店 运 来 2 箱 足球 ， 每箱 12 个 ． 这些 足球 一共 价值 936 元 ． 平均 每个 足球 价值 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13905", "content": "一 只 长颈鹿 高 6 米 ， 一只 梅花鹿 高 约 是 长颈鹿 的 (1/3) ， 这 只 梅花鹿 高 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19074", "content": "甲乙 两辆 汽车 同时 从 a 、 b 两个 车站 出发 相向 而 行 ， 经过 5 小时 在 途中 相遇 ， 甲 车 每 小时 行 85 千米 ， 乙 车 每 小时 行 80 千米 ， 乙 车 在 途中 曾 停车 1.5 小时 ， a 、 b 两站 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3636", "content": "一 个 因数 是 147 ， 另 一个 因数 是 7 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15243", "content": "某 特种部队 在 丛林 地区 接到 一项 反恐 任务 ， 把 推进 速度 从 60 千米 / 小时 提高 到 72 千米 / 小时 ， 结果 提前 4 小时 还 差 36 千米 就 赶到 预定 地点 投 人 战斗 ． 行动 中 用 了 多少 小时 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "4491", "content": "超市 运 来 黄瓜 300 千克 ， 比 运 来 的 西红柿 少 25% ， 运 来 西红柿 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "592", "content": "0.6 与 0.7 的 和 除 52 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18565", "content": "一 项 工程 ， 实际 投资 了 43 万元 ， 比 计划 节约 了 7 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22937", "content": "一 件 衬衫 100 元 ， 一件 毛衣 的 价格比 它 的 2 倍 还 多 6 元 ， 毛衣 的 价格 = 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10316", "content": "王 芳 身高 116 厘米 ， 小 红 比 她 矮 18 厘米 ， 小 红 身高 = 多少 厘米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4990", "content": "甲 、 乙 两 人 共有 邮票 若干 张 ， 其中 甲 占 (9/20) ， 若 乙 给 甲 12 张 ， 则 乙 余下 的 张 数 占 总数 的 (2/5) ． 两 人 共有 邮票 多少 张 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "600", "content": "甲 、 乙 两辆 汽车 分别 从 a 、 b 两地 同时 相对 开出 ， 当 甲 车行 了 全程 的 (3/7) 时 ， 乙 车行 了 36 千米 ， 当 甲 车 到达 b 地 时 ， 乙 车行 了 全程 的 (7/10) ， 求 ab 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20533", "content": "水果 店里 橘子 、 桃子 、 苹果 的 重量 比 为 2 ： 5 ： 4 ， 如果 橘子 有 320 千克 ， 那么 桃子 和 苹果 一共 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19472", "content": "王师傅 加工 一批 零件 ， 5 小时 加工 20 个 ， 刚好 加工 了 这 批 零件 的 (1/3) ， 照 这样 计算 ， 加工 完 这 批 零件 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19860", "content": "东升 钢铁厂 原 计划 全年 产 钢 135.8 万吨 ， 结果 上半年 生产 79.6 万吨 ， 下半年 生产 82.4 万吨 ， 今年 超过 计划 多少 万吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10720", "content": "一 支 修路 队 修 一条 长 780 米 的 公路 ， 前 8 天 每天 修 45 米 ， 剩下 的 要 在 6 天 内 修 完 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5138", "content": "某 水泥厂 上半年 实际 生产 水泥 3 万吨 ， 比 原 计划 多 生产 水泥 0.6 万吨 ． 上半年 比 原 计划 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14920", "content": "甲 、 乙 两车 从 a 城 出发 ， 甲 车 每 小时 行 75 千米 ， 先行 12 小时 后 ， 乙 车 以 每 小时 120 千米 的 速度 去 追 甲 车 ， 多少 小时 追 上 甲 车 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10964", "content": "一 种 商品 ， 先 降价 20% 出售 ， 后 又 打 0.9 ， 这时 售价 360 元 ， 商品 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16331", "content": "一 个 梯形 剪成 一个 平行四边形 和 一个 三角形 ， 梯形 上 底 4.2 分 米 ， 下 底 6 分 米 ， 高 5 分 米 ， 剪 得 平行四边形 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13784", "content": "一 列 快车 和 一列 慢车 同时 从 甲 、 乙 两地 相对 开出 ， 快车 行 完全 程 的 (5/9) 时 ， 与 慢车 相遇 ． 慢车 继续 以 每 小时 45 千米 的 速度 向前行驶 ， 用 2 小时 行 完 余下 的 路程 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20528", "content": "把 10 克 盐 溶解 在 40 克 水中 ， 盐 的 重量 是 水 重量 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6883", "content": "六年级 的 3 个 好 朋友 玩 跳绳 ． 小 明 跳 了 120 个 ， 小 明 跳 的 是 小 亮 的 (5/8) ， 小强 跳 的 是 小 亮 的 (7/8) ， 请问 小强 同学 跳 了 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5045", "content": "一 个数 除以 6 ， 商 是 112 ， 余数 是 4 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20545", "content": "果园 里 有 桃树 45 棵 ， 梨树 棵 树 是 桃树 的 (5/9) ， 有 梨树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6329", "content": "洗衣机 厂 4 月份 计划 生产 洗衣机 3600 台 ， 实际上 半月 完成 了 计划 的 48% ， 下半月 完成 了 计划 的 57% ． 这个 月 超产 多少 台 洗衣机 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9223", "content": "6 • 一 儿童节 ， 学校 开 联欢会 ， 买 了 水果糖 12 千克 ， 买 的 奶糖 是 水果糖 的 (2/3) ， 又 是 买 的 酥糖 的 (4/5) ， 学校 买 了 酥糖 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10134", "content": "挖 一条 水渠 ， 计划 20 天 完成 任务 ， 实际 每天 挖 200 米 ， 结果 提前 5 天 完成 ， 这 条 水渠 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5478", "content": "学校 有 一条 长 60 米 的 小道 ， 计划 在 道路 一侧 种树 ． 每隔 3 米 栽 一棵 ， 如果 两端 都 各 栽 一棵树 ， 那么 共 需 栽 多少 棵 树苗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17974", "content": "菜场 运进 一批 白菜 ， 下午 比 上午 多 运进 10% ， 上午 比 下午 少 运进 100 千克 ． 菜场 上午 运进 了 多少 千克 白菜 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19340", "content": "李老师 为 学校 买 了 5 个 篮球 ， 每个 50 元 ， 还 剩 75 元 ． 李老师 一共 带 去 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22397", "content": "甲 数 比 乙 数多 (4/5) ， 乙 数 比 甲 数 少   ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16716", "content": "有 5 箱 乒乓球 ， 每箱 6 筒 ， 每 筒 有 12 个 乒乓球 ． 一共 有 多少 个 乒乓球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3718", "content": "一 件 儿童 上衣 98 元 ， 一条 长裤 比 上衣 便宜 12 元 ， 一条 裙子 的 价格 是 长裤 的 2 倍 ． 这 条 裙子 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3797", "content": "王师傅 做 零件 ， 上午 工作 4 小时 ， 共 做 零件 220 个 ， 下午 工作 3 小时 ， 共 做 零件 130 个 ， 一天 平均 每 小时 做 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19891", "content": "五年级 有 学生 49 人 ， 其中 有 女生 27 人 ， 男生 占 全班 总 人数 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20249", "content": "买 同 一种 布 ， 张 妈 买 12 米 ， 李 婶 买 7 米 ， 张 妈 比 李 婶 多用 40 元 ， 这种 布 每 米 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15903", "content": "化纤厂 由于 加强 企业 管理 ， 每班 的 工人 由 800 名 减少 到 650 名 ． 现在 每班 工人 数 比 原来 减少 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1784", "content": "一 个 加数 是 196 ， 另 一个 加数 是 397 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1287", "content": "电视机厂 5 月份 计划 生产 电视机 5000 台 ， 实际 生产 了 6000 台 ， 超额完成 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1495", "content": "学校 开展 为 希望 小学 捐书 的 活动 ， 全校 有 6 个 年级 ， 每个 年级 4 个 班 ， 平均 每班 捐书 50 本 ． 一共 捐书 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2642", "content": "一 块 试验田 面积 是 (2/3) 公顷 ， 其中 (1/5) 用来 种 荞麦 ， (3/10) 用来 种 小米 ， 其余 的 种 芝麻 ． 种 芝麻 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3401", "content": "5 峰 粮食 收购站 ， 收购 了 5 车 稻谷 ， 共 630 吨 ， 收购 的 小麦 比 稻谷 少 12 吨 ， 收购 小麦 和 稻谷 共 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7063", "content": "用 一张 边长 是 20 厘米 的 正方形 铁皮 ， 围成 一个 圆柱体 ， 这个 圆柱体 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20839", "content": "一 条 路 全长 2650 米 ， 甲队 每天 修 260 米 ， 已经 修 了 4 天 ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13848", "content": "把 长 为 18 厘米 、 宽 是 12 厘米 的 正方形 纸片 剪成 边长 是 3 厘米 的 正方形 纸片 ， 共 可 剪成 多少 个 这样 的 小 正方形 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12657", "content": "玩具厂 有 50 名 工人 ， 其中 女职工 有 15 人 ， 男 职工 占 全厂 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14778", "content": "有 (31/2) 千克 奶糖 ， 每 (1/4) 千克 装 一袋 ， 可以 装 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5686", "content": "黑白 团队 在 一个 黑漆漆 的 山 庙里 点 上 了 24 支 蜡烛 ． 突然 一阵风 吹灭 了 5 支 蜡烛 ； 过 了 一会 ， 又 被 吹灭 了 4 支 ； 这时 奥 斑马 把 窗子 都 关上 ， 之后 就 再也 没有 蜡烛 被 吹灭 ． 那么 ， 山 庙里 最后 还 剩下 多少 支 蜡烛 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5377", "content": "我校 六年级 同学 参加 合唱队 的 有 80 人 ， 比 参加 体育 活动 组 人数 的 2 倍 多 8 人 ， 参加 体育 活动 组 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16835", "content": "美术组 有 22 人 ， 体育组 的 人数 是 美术组 的 3 倍 ， 两个 组 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13111", "content": "李老师 要 批改 52 篇 作文 ， 已经 批改 了 7 篇 ． 剩下 的 如果 每 小时 批改 9 篇 ， 还要 几小时 能 批改 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18383", "content": "某 公司 王经理 的 儿子 结婚 请客 ， 共 请客 68 桌 ， 每 桌 价格 为 860 元 ， 王经理 共 花费 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22764", "content": "学校 一共 展示 了 378 件 昆虫 标本 ． 每块 展板 排 6 行 ， 每行 放 9 件 ． 可以 放满 几块 展板 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15877", "content": "学校 有 20 个 足球 ， 足球 比 篮球 多 (1/4) ， 篮球 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20307", "content": "商店 运 来 红 毛衣 25 包 ， 运 来 蓝 毛衣 的 包 数 是 红 毛衣 的 (3/5) ． 商店 运 来 蓝 毛衣 多少 报 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9875", "content": "一 块 地 ， 其中 (1/9) 种 玉米 ， (4/11) 种 青菜 ， 其余 种 西瓜 ． 种 西瓜 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3160", "content": "一 本 故事书 ， 原来 每页 排 576 字 ， 排 了 25 页 ． 再版 时 字 改 小 了 ， 只 需 排 18 页 ． 现在 每页 比 原来 多排 多少 个 字 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9437", "content": "六年级 参加 数学 兴趣小组 的 有 60 人 ， 占 全年 级 人数 的 (1/4) ． 参加 科技 小组 的 人数 是 全年 级 人数 的 (1/5) ， 六年级 参加 科技 小组 的 学生 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18923", "content": "一 辆 汽车 往返 于 甲 、 乙 两地 ， 去 时 的 速度 为 56 千米 / 时 ， 共用 5 小时 ， 返回 时 只用 了 4 小时 ， 这辆 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8307", "content": "陈 师傅 加工 221 个 零件 ， 6 小时 加工 了 78 个 零件 ， 照 这样 计算 ， 还要 加工 几小时 才能 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21874", "content": "禾 甸 小学校 园内 要 植树 480 棵 ， 前 5 天 平均 植树 60 棵 ， 余下 的 任务 要 在 4 天 内 植 完 ， 平均 每天 植树 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17992", "content": "一 批 煤 ， 原 计划 每天 烧 96 千克 ， 可 烧 45 天 ． 实际 每天 烧 72 千克 ， 实际 比 原 计划 要 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9039", "content": "510 - 240 的 差 除以 9 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8004", "content": "小胖 去 文具店 买 文具 ， 他 所 带 的 钱 ， 如果 买 9.8 元 的 钢笔 后 ， 还 能 剩下 5.2 元 ． 如果 改 买 5.8 元 的 水笔 ， 他 还 能 剩下 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6719", "content": "5 （ 3 ） 班 共有 32 名 同学 参加 了 今年 的 书法 比赛 ， 最后 6 名 进入 决赛 ． 进入 决赛 的 人数 占 所有 参赛 队员 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6226", "content": "学校 有 5 盒 乒乓球 ， 每盒 8 个 ， 后来 又 买来 10 个 ． 现在 一共 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12585", "content": "商店 运 来 37 箱 可乐 和 13 箱 果汁 ， 每箱 都 是 24 瓶 ， 一共 有 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8816", "content": "我 父亲 31 岁 时 我 8 岁 ， 今年 父亲 的 年级 比 我 大 一倍 ， 我 今年 应该 几岁 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9233", "content": "某校 计划 购置 图书 1200 册 ， 实际 购书 比 计划 多 20% ， 实际 购书 多少 册 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13670", "content": "一 个 圆形 花坛 的 直径 是 6 米 ， 绕 花坛 跑 一周 ， 要 跑 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15638", "content": "水果店 运 来 10 箱 苹果 ， 每箱 25 千克 ， 卖出 一些 后 ， 余下 180 千克 ， 卖出 了 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12736", "content": "书包 每个 82 元 ， 笔盒 每个 18 元 ， 现在 想 全班 32 人 每人 买 一套 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19459", "content": "一 段 公路 两周 修好 ， 第一周 修 了 全长 的 (3/8) ， 比 第 二 周 少 修 80 米 ， 这 段 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17444", "content": "学校 图书室 有 故事 类书 488 本 ， 文艺 类书 160 本 ， 把 这些 书 平均 分给 6 个 班 ． 每个 班 分 得 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2319", "content": "甲乙 两车 同时 从 两地 相对 开出 ， 9 小时 后 两车 相遇 ， 相遇 时 甲 车 正好 行 全程 的 (2/5) ． 乙 车行 完全 程 需要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3386", "content": "服装厂 做 一种 时装 ， 原来 每件 衣服 用布 1.6 米 ， 现在 每件 节省 用布 0.2 米 ． 原来 做 560 件 时装 所用 的 布 ， 现在 可以 多 做 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1647", "content": "一 箱 苹果 ， 吃 了 (1/3) ， 吃 了 18 颗 ， 这 箱 苹果 原有 多少 颗 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23076", "content": "一 块 菜地 ， (1/5) 种 茄子 ， (2/3) 种 黄瓜 ， 其余 的 种 菠菜 ， 种 菠菜 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9767", "content": "乙地 在 甲 ， 丙 两地 的 正中间 ， 一辆 汽车 从 甲地 出 发行 48.5 千米 后 离 乙地 还有 14.5 千米 ， 这时 汽车 离 丙 地 还有 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22263", "content": "小 华 家 本月 的 水费 是 20 元 ， 比 上 月 节约 了 20% ， 上 月 的 水费 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11037", "content": "迎 2008 年 奥运 ， 完成 一项 工程 ， 甲队 单独 做 20 天 完成 ， 乙 队 单独 做 要 30 天 完成 ． 甲队 先 干 了 这项 工程 的 (1/4) 后 ， 乙 队 又 加入 施工 ， 两队 合作 了 多少 天 完成 这项 工程 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22642", "content": "把 一批 重 50 吨 的 水果 运往 外地 ． 先 用 载重 (5/2) 吨 的 汽车 运 了 8 次 ， 余下 的 改用 载重 (5/4) 吨 的 拖拉机 运 ， 还要 几次 才能 运 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9331", "content": "服装厂 用 155.4 米 布 给 学生 做 了 84 套 秋季 校服 ， 平均 每套 校服 用布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2711", "content": "每千克 梨子 5 元 ， 小 红 买 了 49 千克 梨子 ， 小 红 大约 用 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4411", "content": "学校 运动会 上 ， 参加 团体操 表演 的 同学 中 ， 男生 有 570 人 ， 女生 有 360 人 ， 每行 站 30 人 ， 男生 比 女生 多 站 几行 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17489", "content": "甲 仓 可 存粮 180 吨 ， 已知 乙 仓 实际 存粮 是 甲 仓 存粮 数 的 (3/5) ， 乙 仓 实际 存粮 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4078", "content": "一 种 vcd 影碟机 现在 的 价钱 是 924 元 ， 比 原来 降低 (4/15) ． 原来 的 价钱 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6591", "content": "稻香村 食品店 有 2 位 售货员 ， 今年 “ 端午 ” 节 假期 （ 3 天 ） 共 售出 粽子 234 盒 ， 平均 每人每天 售出 粽子 多少 盒 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3859", "content": "小 明 买 了 一套 《 安徒生 童话集 》 ， 付 了 74.8 元 ， 比 原价 优惠 了 12% ． 这 套书 定价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13867", "content": "一 件 上衣 打 0.85 出售 是 255 元 ， 这件 上衣 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18240", "content": "小 红 家 有 一辆 自行车 ， 车轮 周长 大约 是 (23/12) m ， 如果 平均 每分钟 转 100 周 ， 小 红 从 家 到 学校 大约 骑 了 9 分钟 ， 学校 到 家 的 路程 是 多 远 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22049", "content": "一 个数 是 (15/16) ， 它 的 (4/5) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2543", "content": "含盐 20% 的 盐水 50 克 ， 再 加多少 克 水 ， 才能 使 盐水 含盐 5% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18713", "content": "一 个数 减去 它 本身 的 (3/4) 后 ， 再 加上 5 ， 结果 是 28 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20059", "content": "学校 买来 红笔 有 200 支 ， 黑笔 是 红笔 的 (4/5) ， 又 是 蓝 笔 的 (5/8) ， 蓝 笔 有 多少 支 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5080", "content": "明明 今年 的 身高 是 85 cm ， 比 去年 高 5 cm ， 明明 身高 增高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6704", "content": "平冈 小学 六年级 有 学生 318 人 ， 五年级 学生 人数 是 六年级 的 (5/6) ， 平冈 小学 五年级 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11527", "content": "一 根 绳子 长 43 米 ， 用 这根 绳子 剪成 10 根 同样 长 的 跳绳 ， 还 余 3 米 ， 每 根 跳绳 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7958", "content": "小 明 今年 的 身高 是 1.53 米 ， 比 去年 长 高 了 0.07 米 ． 小 明 去年 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "23160", "content": "一 项 工作 ， 小 华 单独 做 (1/2) 小时 完成 ， 小 明 单独 做 (1/3) 小时 完成 ． 若 两个 人 合作 则 需要 多少 小时 才能 完成 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2528", "content": "某 牛奶 厂 今年 年产 牛奶 550 万吨 ， 比 去年 增加 了 110 万吨 ， 今年 比 去年 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15407", "content": "小 军 2 分钟 走 98 米 ， 用 这样 的 速度 他 从 家 到 学校 要 走 9 分钟 ， 小 军 家 到 学校 有 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1354", "content": "小 明 6 天 看 了 一 本书 的 (2/3) ， 平均 每天 看 这 本书 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15945", "content": "一 根 绳 用 去 20% ， 正好 用 去 了 10 米 ， 这根 绳 有 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15400", "content": "小 明 家 参加 保险公司 的 财产保险 ． 参加 保险 的 财产 总额 是 42000 元 ， 如果 每年 的 保险费率 是 1.5% ， 小 明 家 每年 应付 保险费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11715", "content": "(4/5) 与 (1/3) 的 和 乘 它 的 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20283", "content": "妈妈 开车 从 家里 出发 去 批发市场 批发 水果 ， 每 小时 行驶 62 千米 ， 用 了 3 小时 ． 水果 批发市场 距离 家 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3809", "content": "参加 科技馆 的 成人 人数 是 儿童 的 3 倍 ． 如果 一共 有 240 人 参观 ， 儿童 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16309", "content": "一 件 上衣 原价 300 元 ， 现 按 0.85 出售 ， 应 卖 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22316", "content": "建造 一栋 大楼 ， 实际 投资 200 万元 ， 节约 了 50 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1530", "content": "运输队 要 运输 一批 面粉 ， 第一次 运走 全部 的 (3/7) ， 第 二 次 运走 全部 的 (2/7) ， 两次 共 运走 了 450 吨 ， 这 批 面粉 共有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2467", "content": "妈妈 买 了 白布 15 米 ， 买 的 花布 比 白布 少 (1/3) ． 买 花布 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2036", "content": "小 星 看 一 本书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 全书 的 20% ， 两天 共 看 33 页 ， 这 本书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2671", "content": "小 丽 的 小 储 钱 罐 里 有 20 元 的 人民币 3 张 ， 5 元 的 人民币 6 张 ， 1 元 的 人民币 12 张 ， 小 储 钱 罐 里 一共 有 多少 元 钱 ， 写出 你 用到 的 算式 ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "18773", "content": "一 桶 油 ， 第一次 用 去 25.2 千克 ， 第 二 次 用 去 总数 的 (1/4) ， 结果 还 剩下 4.2 千克 ， 这 桶 油 原来 重 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3070", "content": "把 一些 水果糖 分别 装 在 4 个 盘子 里 ， 其中 20% 放入 甲 盘 ， (1/3) 放入 乙 盘 ， 放入 丙 盘 的 水果糖 是 甲 、 乙 两盘 水果糖 总数 的 (1/4) ， 丁 盘 放入 10 块 水果糖 ， 这些 水果糖 共有 多少 块 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22858", "content": "供销社 收购 鸡蛋 1300 千克 ， 收购 的 鸭蛋 比 鸡蛋 多 2500 千克 ． 收购 的 鸡蛋 和 鸭蛋 共 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1558", "content": "一 件 西裤 162 元 ， 一条 西裤 138 元 ， 阿姨 卖 了 14 条 西装 ， 一共 收入 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17776", "content": "小 兰 拿 10 元 钱 去 商店 买 文具 ， 她 买 2 支 同样 的 圆珠笔 ， 每支 价格 2.2 元 ， 剩下 的 钱 正好 买 4 本 练习本 ， 每 本 练习本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6882", "content": "某 饭店 8 月份 的 营业额 是 4 万元 ， 按 营业额 的 5% 缴纳 营业税 ， 应 纳税 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9613", "content": "兄弟俩 共有 邮票 30 张 ， 如果 哥哥 给 弟弟 4 张 后 还 比 弟弟 多 2 张 ， 哥哥 原来 有 邮票 多少 张 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5341", "content": "一 个 比例 的 两个 内 项 互为 倒数 ， 其中 一个 外 项 是 8 ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14015", "content": "教室 有 桌子 和 椅子 共 36 张 ， 桌子 和 椅子 的 比 是 7 ： 2 ， 之后 又 买来 了 一些 桌子 ， 桌子 数 占 总数 的 80% ， 又 买来 多少 张 桌子 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19534", "content": "玩具厂 原 计划 生产 电动玩具 6000 件 ， 实际 比 计划 多 生产 (1/5) ． 实际 生产 电动玩具 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11947", "content": "运 一批 货物 ， 第一天 运 了 24 吨 ， 第 二 天运 了 这 批 货物 的 (1/3) ， 还 剩 15 吨 货物 没有 运 ． 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6284", "content": "按照 国家 规定 ， 对 个人 在 银行存款 所得 的 利息 要 征收 20% 的 税 ， 李 奶奶 存入 银行 10000 元 ， 定期 一年 ， 年利率 是 2.25% ， 一年 后 李 奶奶 实 得 利息 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22824", "content": "(3/5) 的 (3/4) 与 (5/8) 的 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14034", "content": "28 与 6.2 的 和 减去 一个 数 的 3 倍 等于 15.75 ， 这个 数 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14894", "content": "(1/30) + (1/42) + (1/56) + (1/72) + (1/90) + (1/110) + (1/132) = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "3997", "content": "一 块 布 长 40 米 ， 先剪 去 它 的 40% ， 再剪 去 (1/2) 米 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4892", "content": "爸爸 带 明明 去 滑雪 ， 乘 缆车 上山 用 了 10 分钟 ， 缆车 每分钟 行 200 米 ． 滑雪 下山 用 了 30 分钟 ， 每分钟 行 70 米 ． 滑雪 比 乘 缆车 多行 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14400", "content": "丽丽 的 妈妈 通过 银行 给 奶奶 汇 去 2000 元 钱 ， 如果 银行 收取 0.75% 的 手续费 ， 妈妈 应交 多少 元 的 手续费 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9961", "content": "一 个 长方体 游泳池 ， 长 50 米 、 宽 30 米 、 深 2.4 米 ． 如果 每分钟 注水 8 立方米 ， 将 这个 空 池 注满 水 要 多少 分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2338", "content": "前进 小学 有 学生 1260 人 ， 没有 加入 少先队 的 学生 有 63 人 ， 前进 小学 少先队员 占 全校学生 总数 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17043", "content": "一 本书 的 (1/6) 是 35 页 ， 它 的 (1/5) = 多少 页 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5351", "content": "甲 有 14 本书 ， 乙 给 甲 6 本 后 两 人 书 的 本 数 相等 ， 乙 原来 有 多少 本书 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4397", "content": "剧院 楼下 有 座位 840 个 ， 是 楼上 座位 的 21 倍 ， 这个 剧院 一共 有 多少 个 座位 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21409", "content": "小 明 统计 班里 的 数学 成绩 ， 平均 分数 为 85.74 ， 后来 发现 一个 同学 原来 的 分数 为 97 ， 统计 时 误 统计 为 67 ． 重新 统计 后 平均 分数 为 86.49 ， 此 班 共有 多少 个 学生 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3653", "content": "两 数 相乘 的 积 是 96 ， 如果 把 这 两个 因数 都 缩小 到 原来 的 (1/10) ， 这时 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2336", "content": "幸福 水果店 购回 苹果 150 千克 ， 梨 73 千克 ． 购回 西瓜 的 数量 是 苹果 和 梨 总数 的 4 倍 ， 水果店 购回 西瓜 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10627", "content": "小 明 今年 12 岁 ， 爷爷 的 年龄 比 他 的 6 倍 少 5 岁 ， 爷爷 今年 多少岁 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7203", "content": "工地 上 运 来 一堆 黄沙 ， 用 去 (4/7) 吨 后 ， 还 剩 (2/7) 吨 ． 这 堆 黄沙 原来 有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2661", "content": "好 再 来 超市 用 塑料袋 包装 120 千克 水果糖 ． 如果 每 袋装 (1/8) 千克 ， 这些 水果糖 可以 装 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10429", "content": "上 学期 新华 小学 六年级 共有 学生 192 人 ， 这 学期 女生 人数 增加 了 15% 男生 人数 减少 了 6 人 ， 这 学期 全年 级 共有 学生 198 人 ． 上 学期 六年级 有 女生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19647", "content": "王 华 正在 读 一本 故事书 ， 第一周 读 了 80 页 ， 还 剩下 这 本书 的 (3/5) 没 读 ， 这本 故事书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5580", "content": "5 台 织布机 4.5 小时 织布 108 米 ， 平均 每 台 织布机 每 小时 织布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3896", "content": "一 套 家具 降价 400 元 后 以 3600 元 出售 ， 降价 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12048", "content": "张老师 要 批改 58 份 数学试卷 ， 上午 已经 批改 了 18 份 ， 下午 还要 批改 2 小时 ， 下午 平均 每 小时 要 批改 多少 份 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2838", "content": "一 个 长方体 底 面积 是 25 平方厘米 ， 体积 是 200 立方厘米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15357", "content": "博物馆 上午 有 320 人 参观 ， 中午 离去 85 人 ， 下午 又 来 了 128 人 ， 现在 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3325", "content": "王 叔叔 的 果园 里 有 8 棵 苹果树 ， 收 了 344 千克 苹果 ， 平均 每棵 苹果树 收 苹果 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11837", "content": "一 列 火车 长 180 米 ， 每秒 行 30 米 ， 这 列 火车 通过 480 米 长 的 大桥 ， 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11677", "content": "幼儿园 第一次 花 了 90 元 钱 买 了 5 个 皮球 ， 照 这样 计算 ， 第 二 次 再 多 花 72 元 钱 ， 一共 可以 买 几个 皮球 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9314", "content": "某区 100 个 外语 教师 懂 英语 或 俄语 ， 其中 懂 英语 的 75 人 ， 既 懂 英语 又 懂 俄语 的 20 人 ， 那么 懂 俄语 的 教师 为 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16915", "content": "把 一个 棱 长 为 2 dm 的 正方体 削成 一个 最大 的 圆柱体 ， 削去 的 体积 = 多少 dm ^ 3 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.6, "length": 15}
-{"question_id": "14191", "content": "童装 厂 9 月份 计划 生产 童装 2060 套 ， 结果 上 半月 生产 1208 套 ， 下半月 生产 1395 套 ， 超过 计划 多少 套 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "451", "content": "粮店 运 来 面粉 380 千克 ， 运 来 的 大米 比 面粉 的 2 倍 多 20 千克 ， 运 来 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9643", "content": "小 明 寒假 在家 要 写 250 个 大字 ． 前面 10 天 每天 写 了 15 个 ， 余下 的 准备 5 天 写 完 ， 那么 每天 需要 写 多少 个 大字 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1179", "content": "一 段 铁路 ， 已修 的 长度 与 未 修 的 长度 的 比 是 4 ： 5 ， 如果 再 修 50 千米 ， 已修 的 长度 就 占 全长 的 (2/3) ， 这 段 铁路 全长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3036", "content": "一 个 三角形 3 条 边 的 长 分别 是 (1/3) 米 、 (5/9) 米 和 (7/18) 米 ， 这个 三角形 的 周长 = 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1816", "content": "仓库 有 150 吨 钢材 ， 第一次 用 去 总数 的 20% ， 第 二 次 用 去 总数 的 (1/2) ， 还 剩下 多少 吨 钢材 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19469", "content": "粮库 用 3 辆 小 卡车 运 面粉 ， 每 车 装 95 袋 ， 每 袋 25 千克 ， 这个 粮库 共运 面粉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21269", "content": "一 杯 糖水 中 ， 糖 的 含量 是 糖水 的 10% ， 500 克 这样 的 糖水 中 ， 水 有 多少 克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4941", "content": "一 根 绳子 截去 全长 的 (2/5) 正好 截去 8 米 ， 这根 绳子 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9461", "content": "一 堆 钢管 近似 三角形 ， 相邻 两层 之间 相差 2 根 ， 最 下层 有 25 根 ， 这 4 堆 钢管 共有 多少 根 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "16934", "content": "小林 家 今年 售出 自家 种植 的 草皮 ， 每平方米 6.5 元 ， 收入 455 元 ， 小林 家 出售 了 多少 平方米 的 草皮 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10201", "content": "一 根 长 (7/8) 米 的 绳子 ， 用 去 一部分 后 还 剩 (4/5) 米 ， 用 去 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13872", "content": "学校 有 篮球 60 个 ， 篮球 比 足球 少 (1/4) ， 足球 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17667", "content": "胜利 乡 中心小学 在 荒山 上 植树 ， 2005 年 共 植树 516 棵 ， 2006 年 植树 4 次 ， 每次 植树 127 棵 ． 两年 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11329", "content": "一 个人 血液 占 体重 的 (1/13) ． 小 明 体内 血液 约 4 千克 ， 他 的 体重 约 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7609", "content": "会议 大厅 里 有 10 根 底面 直径 0.6 米 ， 高 6 米 的 圆柱形 柱子 ， 现在 要 刷 上 油漆 ， 每平方米 用 油漆 0.5 千克 ， 刷 这些 柱子 要 用 油漆 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "15706", "content": "新 时代 服装厂 本月 计划 生产 一批 服装 ， 实际 上旬 完成 了 计划 的 (3/10) ， 中旬 完成 了 计划 的 (2/5) ， 下旬 完成 了 计划 的 (1/3) ． 这个 月 超额完成 了 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3096", "content": "某地 要 修 一条 环山公路 ， 第一期 工程 修 了 全长 的 45% ， 第 二 期 工程 修 了 全长 的 20% ， 还 剩下 1120 米 没有 修 完 ． 这 条 环山公路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11036", "content": "计算 ： (1/2) - (1/6) - (1/12) - (1/20) - (1/30) - (1/42) - (1/56) - (1/72) = ．", "knowledge": ["-"], "difficulty": 0.6, "length": 15}
-{"question_id": "4643", "content": "列式 计算 ． (2/3) 的 (1/2) - (1/4) 的 差 除以 (3/4) ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3678", "content": "李老师 带 45 名 学生 去 划船 ， 每 5 人 租 一条 船 ， 至少 要 租 多少 条 船 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5024", "content": "爸爸 带 小 明 去 滑雪 ， 乘 缆车 上山 用 了 4 分钟 ， 缆车 每分钟 行 200 米 ． 滑雪 下山 用 了 20 分钟 ， 每分钟 行 70 米 ． 滑雪 比 乘 缆车 多行 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13602", "content": "修路 队 今年 修路 2600 米 ， 比 去年 少 修 (1/5) ， 去年 修路 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3488", "content": "运输队 原 计划 25 天 运货 1000 吨 ， 实际 每天 运货 50 吨 ． 实际 比 计划 提前 几天 运 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9934", "content": "买 3 支 钢笔 比 买 5 支 圆珠笔 多 花 0.3 元 ， 每支 圆珠笔 1.5 元 ． 每支 钢笔 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10820", "content": "每 25.55 公尺 种 一棵 行道树 ， 路 的 两端 要 种树 ， 大同 路上 共 种 了 125 棵 行道树 ， 请问 大同路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17033", "content": "一 辆 汽车 从 a 到 b 城 ， 第一 小时 行 了 全程 的 (1/4) ， 第 二 小时 行 了 80 千米 ， 这时 恰好 行 了 全程 的 (3/4) ． a 、 b 两城 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19273", "content": "直径 是 8 厘米 的 圆 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14342", "content": "新华 小学 合唱组 有 80 人 ， 美术组 的 人数 是 合唱组 的 (3/5) ， 科技 组 的 人数 是 美术组 的 (2/3) ， 科技 组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1222", "content": "一 筐 小麦 ， 连 筐 称 共 重 40.5 千克 ， 取出 一半 后 ， 连 筐 还有 21.5 千克 ， 筐 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3266", "content": "参观 科技馆 的 成人 人数 是 儿童 的 2 倍 ， 参观 的 儿童 有 152 人 ， 一共 有 多少 人 参观 科技馆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16983", "content": "列车 提速 后 ， 穿过 某个 山洞 所用 时间 由 原来 的 40 秒 减少 到 现在 的 30 秒 ， 现在 穿过 山洞 的 时间 是 原来 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11705", "content": "库房 有 一批 货物 ， 第一天 运走 20 吨 ， 第 二 天运 的 吨数 比 第一天 多 (6/17) ， 还 剩 这 批 货物 总重量 的 (9/17) ， 这 批 货物 有 多少 吨 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10087", "content": "语文 书 每 本 售价 5.93 元 ， 数学 书 每 本 售价 5.45 元 ． 老师 从 书店 够 回 62 套书 ， 共 花费 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12841", "content": "50 个 学生 中 带 圆珠笔 的 有 10 人 ， 带 铅笔 的 有 45 人 ， 两种 笔 都 没有 带 的 有 1 人 ， 两种 笔 都 带 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19068", "content": "一 根 长 (7/20) 米 的 铁丝 ， 剪 13 次 剪成 同样 的 小 段 ， 平均 每 段长 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10304", "content": "去年 ， 甲 车间 制作 一个 风筝 需 32 分钟 ， 每天 可以 做 15 个 风筝 ． 今年 该 车间 改进 工艺 ， 每个 风筝 的 制作 时间 比 去年 减少 8 分钟 ， 则 今年 甲 车间 一天 可以 制作 多少 个 风筝 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14465", "content": "某 车间 把 加工 的 零件 任务 按 3 ： 5 分给 徒弟 和 师傅 俩 人 ， 师傅 实际 加工 了 180 个 ， 超过 原 分配任务 的 20% ， 原 计划 徒弟 加工 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "1181", "content": "动物园 里 的 一头 大象 每天 吃 180 千克 食物 ， 一只 熊猫 2 天 吃 72 千克 食物 ． 大象 每天 吃 的 食物 是 熊猫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19124", "content": "李 庄 要 修 一条 长 1200 千米 长 的 水渠 ， 前 3 天 修 了 全长 的 60% ． 照 这样 计算 ， 修 完 这 条 水渠 还 需要 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5721", "content": "某 工厂 生产 了 540 个 乒乓球 ， 每 10 个 装 一 筒 ， 每 9 筒 装 一箱 ． 一共 装 了 多少 箱 ？ （ 列 综合 式 解答 ）", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14032", "content": "把 一个 西瓜 平均 分给 5 个 小朋友 ， 每人 得到 这个 西瓜 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10509", "content": "暖 羊 羊 ， 灰 太 狼 两 人 分别 从 相距 20 千米 的 两地 同时 出发 相向 而 行 ， 假如 暖 羊 羊 每 小时 行走 4 千米 ， 灰 太 狼 每 小时 走 6 千米 ， 两 人 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14118", "content": "小 明 和 5 个 好 朋友 一起 折纸 风车 ， 每人 折 9 个 ． 送给 幼儿园 小朋友 17 个 ， 还 剩 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4746", "content": "沈阳 到 北京 的 铁路 长 738 千米 ， 一辆 火车 从 沈阳 出发 ， 以 每 小时 41 千米 的 速度 行驶 ， 问 需要 行驶 几小时 到达 北京 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9710", "content": "一 本书 有 324 页 ， 王 强 第一个 星期 看 了 全书 的 (1/3) ， 那么 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1854", "content": "一 个数 除以 47 ， 商 是 9 ， 余数 是 1 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15554", "content": "一 列 火车 以 每分钟 800 米 的 速度 ， 通过 一座 长 3760 米 的 大桥 ， 如果 火车 全长 240 米 ， 从 车 头上 桥 到 最后 一 节车厢 离开 大桥 另一端 ， 一共 需 多少 分钟 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22324", "content": "一 个数 的 75% 是 30 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2892", "content": "农场 有 桃树 96 棵 ， 是 梨树 棵 数 的 (2/3) ， 苹果树 棵 数 是 梨树 的 (3/4) ， 农场 有 苹果树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12513", "content": "一 条 公路 ， 第一天 修 了 (1/4) ， 第 二 天 修 了 (1/3) ， 还 剩 80 米 ， 还 剩 ( ( ( ) ) / ( ( ) ) ) 没 修 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21270", "content": "星星 影剧院 ， 设置 了 35 排座位 ， 每排 有 25 个 座位 ， 放映 某 场 电影 ， 每位 票价 是 4 元 ． 如果 满座 一共 可以 收入 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2130", "content": "某 电器 商场 ， 星期日 上午 卖出 收录机 35 台 ， 下午 卖出 的 台数 是 上午 的 (3/5) ， 全天 共 卖出 收录机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2596", "content": "小 玲 和 妈妈 到 商场 购物满 100 元 ， 可以 抽 一次 奖 ． 在 箱子 里 装 了 6 个 大小 相同 的 球 ， 1 个 红球 和 5 个 白 球 ， 摸 出 红球 为 获奖 ． 小 玲 任意 摸 出 一个 ， 中奖 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2129", "content": "张 爷爷 买 3 只 小羊 用 了 135 元 ， 他 还 想 再 买 5 只 这样 的 小羊 ， 还 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10895", "content": "筑路 队 要 修 一条 长 180 千米 的 路 ， 原来 每天 修 6 千米 ， 修 了 15 天 以后 加快速度 ， 每天 修 7.5 千米 ， 修 完 这 条 路 还要 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9459", "content": "修 一条 长 800 米 的 公路 ， 前 5 天 修 了 250 米 ， 照 这样 计算 ， 再 修 多少 天 就 能 把 这 条 公路 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17292", "content": "小 欣 今年 8 岁 ， 相当于 爸爸 年龄 的 (1/4) ， 爸爸 比 小 欣 大 多少岁 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9044", "content": "学校食堂 买来 蔬菜 800 千克 ， 其中 大白菜 占 (2/5) ， 大白菜 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5188", "content": "6440 / 多少 = 28 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7410", "content": "有 甲 、 乙 两个 粮仓 ， 甲 仓 存粮 360 吨 ， 从 甲 仓 运出 (1/3) 后 ， 剩下 的 粮食 是 乙 仓 存粮 的 60% ， 乙 仓 存粮 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12850", "content": "王奶奶 在 卖 报纸 ， 这种 报纸 的 批发价 是 每份 0.85 元 ， 出 售价 是 1 元 ． 王奶奶 卖完 全部 的 报纸 刚好 赚 了 11.1 元 钱 ． 请 你 算算 她 共 卖 了 几份 报纸 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6350", "content": "甲 数 是 35 ， 是 乙 数 的 7 倍 ， 乙 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5639", "content": "钢笔 的 价格 除以 5 ， 再 加上 2 元 ， 正好 是 圆珠笔 的 价格 ， 圆珠笔 的 价格 是 3.6 元 ， 钢笔 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12071", "content": "王师傅 开 着 一辆 汽车 去 某地 ， 前 3 小时 行 了 124 千米 ， 后 2 小时 行 了 86 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11124", "content": "某 商店 7 天 卖出 苹果 840 千克 ， 梨 630 千克 ， 平均 每天 卖出 的 苹果 比 梨 多 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7888", "content": "某种 型号 的 电子词典 原价 360 元 ， 现价 只 卖 270 元 ． 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10802", "content": "新光 小学 六年级 有 128 人 ， 已经 “ 达标 ” 的 占 (5/8) ， 而 “ 达标 ” 的 学生 的 (2/5) 是 女生 ， “ 达标 ” 的 男生 占 六年级 人数 的 几分 之 几 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16126", "content": "冰 融化 成 水 后 ， 体积 比 原来 减少 (1/11) ． 一盒 冰块 体积 是 121 dm ^ 3 ， 融化 成 水 以后 ， 体积 = 多少 立方分米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8655", "content": "甲乙 两地 相距 400 千米 ， 客车 和 货车 同时 从 两地 相对 开出 ， 相向 而 行 ， 4 小时 相遇 ， 已知 货车 每 小时 行 53 千米 ， 问 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10837", "content": "刘 东 把 5500 元 存入 银行 ， 整存整取 5 年 ， 税率 为 5% ， 到期 后 本金 和 税后 利息 为 6884.625 元 ， 年利率 为 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1800", "content": "服装厂 要 加工 一批 儿童服装 ， 如果 每套 用布 1.8 米 ， 可以 加工 450 套 ． 如果 每套 用布 1.5 米 ， 可以 加工 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11552", "content": "修路 队 第一天 修路 456 米 ， 第 二 天 修 的 路 比 第一天 的 3 倍 少 350 米 ， 两天 一共 修 了 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21110", "content": "商店 运进 一批 水果 ， 已 卖出 的 筐 数 与 未 卖出 的 筐 数 的 比 是 3 ： 5 ， 如果 再 卖 44 筐 ， 那么 已 卖 的 占 这 批 水果 总数 的 (4/7) ， 这 批 水果 共有 多少 筐 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9279", "content": "一 堆 货物 60 吨 ， 第一次 用 去 总数 的 (1/3) ， 第 二 次 用 去 总数 的 (2/5) ， 两次 共用 去 多少 吨 货物 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14488", "content": "小 红 骑 自行车 (3/5) 小时 行 了 15 千米 ， 平均 每 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1219", "content": "（ 竞赛题 ） 学校 有 数学 课外 小组 和 作文课 外 小组 ， 参加 数学 小组 的 有 118 人 ， 参加 作文 小组 的 有 140 人 ， 要 使 作文 小组 的 人数 是 数学 小组 的 2 倍 ， 应从 数学 小组 中 调 多少 人 去 作文 小组 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11928", "content": "在 一个 袋子 里 装有 形状 大小 一样 的 红 、 黄 两种 玻璃球 各 5 粒 ． 如果 不用 眼睛 看 ， 要 保证 一次 拿出 两粒 颜色 不 相同 的 玻璃球 ， 至少 必须 摸 出 多少 来 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16902", "content": "一 个 畜牧场 有 牛 280 头 ， 羊 只 数 的 (3/5) 与 牛 的 30% 正好 相等 ， 这个 牧场 有 羊 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18903", "content": "某 车间 每天 做 机器 328 个 ， 做 了 6 天 ， 客户 买 走 1250 个 ， 还 剩 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5037", "content": "童装 厂 原 计划 用 12 天 生产 一批 儿童服装 ， 平均 每天 生产 50 件 ． 实际上 5 天 就 完成 了 生产 任务 ， 实际 平均 每天 生产 了 多少 件 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2173", "content": "一 杯 果汁 ， 喝 了 (4/6) ， 杯中 还有 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11189", "content": "一 块 长方形 的 萝卜 地 ， 长 17 米 ， 宽 12 米 ． 在 这块 地里 一共 收 萝卜 3080 千克 ， 平均 每平方米 收 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13212", "content": "小 东 计划 把 自己 积蓄 的 8000 元 钱 存入 银行 ， 存期 3 年 ， 准备 到期 后 把 利息 捐献 给 贫困地区 的 “ 特困生 “ ， 如果 年利率 按 4.75% 计算 ， 到期 后 他 可以 捐出 利息 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20208", "content": "黄 师傅 每月 收入 1900 元 ， 按规定 工资收入 超过 1600 元 的 部分 要 按 5% 的 税率 缴 个人所得税 ， 黄 师傅 每月 税后 工资 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "375", "content": "小 红 共 收集 邮票 867 张 ， 如果 再 多 收集 231 张 ， 就 正好 是 小 兰 收集 邮票 的 3 倍 ． 小 兰 收集 的 邮票 有 多少 张 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22762", "content": "两个 加数 的 和 是 98 ， 一个 加数 增加 7.36 ， 另 一个 加数 减少 5.5 ， 改变 后 的 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4356", "content": "苹果 的 个数 含有 因数 5 ， 又 是 17 的 倍数 ． 苹果 至少 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19430", "content": "甲乙 两个 工程队 分别 从 两端 同时 开凿 一条 隧道 ， 甲队 每天 凿 18 米 ， 乙 队 每天 凿 22 米 ， 120 天 后 凿 完 ． 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15020", "content": "工人 王师傅 和 徒弟 合作 加工 一批 机器 零件 ． 王师傅 每 小时 加工 60 个 ， 徒弟 每 小时 加工 32 个 ． 王师傅 工作 7 小时 ， 徒弟 工作 9 小时 ， 他们 共 做 了 多少 个 机器 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1083", "content": "老师 布置 了 12 道 数学题 ， 小 红 做 了 (2/3) ， 还 剩 几分 之 几 没 做 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1646", "content": "邦德 华纳 教育 的 同学 向 四川 地震 灾区 儿童 献爱心 ， 六年级 捐款 占 全校 捐款 总数 的 28% ， 五年级 捐款 占 全校 捐款 的 30% ． 五年级 比 六年级 多 捐 56 元 ． 全校 共 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13948", "content": "一 个 因数 是 350 ， 另 一个 因数 是 68 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1359", "content": "一 块 正方体 的 钢锭 ， 棱 长 是 10 分 米 ， 如果 1 立方分米 的 钢 重 7.8 千克 ， 这块 钢锭 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "7483", "content": "学校 开展 兴趣 活动 ， 参加 合唱组 的 人数 是 美术组 的 (4/7) ， 美术组 的 人数 是 田径 组 的 (2/3) ， 合唱组 有 32 人 ， 田径 组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15558", "content": "一 袋 大米 50 千克 ， 第一周 吃掉 了 它 的 (2/13) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9296", "content": "新华书店 运到 2 车 图书 ， 每辆车 装 125 包 ， 每包 有 80 本 ． 新华书店 运到 图书 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18132", "content": "修 一条 长 4.8 千米 的 公路 ， 原 计划 15 天 修 完 ， 实际 12 天 就 完成 了 任务 ， 实际 每天 比 原 计划 多 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2030", "content": "多少 吨 的 4 倍 是 120 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20223", "content": "化肥厂 要 生产 一批 化肥 ， 原 计算 每天 生产 3.6 吨 ， 25 天 可以 完成 ， 实际 提前 5 天 完成 了 任务 ， 实际 每天 生产 化肥 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20358", "content": "一 条 绳子 长 (5/2) 米 ， 剪 去 (2/5) ， 还 剩下 ( ( ( ) ) / ( ( ) ) ) 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13446", "content": "26 * 450 的 积 = ， 积 的 最高 位 = 多少 位 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20448", "content": "军犬 的 耐力 很 强 ， 奔跑 速度 很快 ． 一只 军犬 3.5 小时 能 跑 89.6 千米 ， 平均 每 小时 跑 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16613", "content": "某班 男生 人数 与 女生 人数 的 比 是 4 ： 5 ， 已知 女生 有 30 人 ， 则 男生 有 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10573", "content": "李 丽 把 1000 元 钱 存入 银行 ， 定期 一年 ， 年利率 为 1.98% ， 若 不计 利息税 ， 到期 时 他 可 取出 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14779", "content": "学校 4 天 一共 栽树 212 棵 ， 平均 每天 大约 栽树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11547", "content": "3.6 米 增加 它 的 (1/6) 后 = 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18490", "content": "王老师 用 一些 钱 给 学生 买 奖品 ， 单买 钢笔 可 买 8 支 ， 单买 练习本 可 买 16 本 ， 王老师 买 了 5 支 钢笔 ， 剩下 的 钱 可 买 多少 本 练习本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2190", "content": "商店 进 了 一批 玩具 ， 用 零售价 12 元 卖出 30 个 与 用 零售价 15 元 卖出 20 个 的 利润 相同 ． 那么 每个 玩具 的 进货价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11288", "content": "同学 们 参加 兴趣小组 活动 ， 参加 小 记者团 的 有 24 人 ， 参加 篮球队 的 人数 比 参加 小 记者团 的 人数 多 (1/4) ． 参加 篮球队 的 同学 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9382", "content": "星火 电影院 2 号 厅 有 18 排座位 ， 每排 24 个 座位 ， 一共 可以 容纳 观众 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21649", "content": "小 刚 将 一张 长方形 纸 的 40% 涂 上 蓝色 ， 将 剩下 部分 的 (3/5) 涂 上 红色 ， 涂 上 红色 的 部分 是 这 张 纸 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21720", "content": "师傅 与 徒弟 加工 零件 个数 的 比 是 5 ： 4 ， 已知 徒弟 加工 了 128 个 零件 ， 师傅 加工 了 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10511", "content": "乙 数 是 210 ， 甲 数 是 乙 数 的 4 倍 ， 甲 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17620", "content": "16 个 苹果 ， 吃掉 了 它 的 (3/4) ， 吃掉 了 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16163", "content": "一 台 计算机 现价 4800 元 ， 比 原价 降低 20% ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15110", "content": "食堂 运 来 面粉 420 千克 ， 运 来 的 大米 比 面粉 多 120 千克 ． 如果 每天 吃掉 大米 12 千克 ， 这 批 大米 够吃 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17959", "content": "买 5 箱 纯净水 ， 每箱 有 24 瓶 ， 每瓶 要 1.9 元 ， 一共 要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13452", "content": "一 个 长方体 的 底 面积 是 80 cm ^ 2 ， 高 是 7 cm ， 它 的 体积 = 多少 cm ^ 3 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18898", "content": "两地 相距 260 千米 ， 甲 、 乙 两辆 汽车 同时 从 两地 相对 开出 ， (13/5) 小时 相遇 ， 已知 甲 、 乙 两辆 汽车 的 速度 比 是 12 ： 13 ， 甲 车行 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11966", "content": "梯形 上 底 是 12.6 cm ， 下 底 是 5.4 cm ， 高 是 12.5 cm ， 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9864", "content": "三年级 有 4 组 同学 去 植树 ， 每组 12 人 ， 三年级 去 了 多少 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14271", "content": "一 辆 卡车 运送 化肥 ， 上午 3 次 运 了 4260 千克 ， 下午 4 次 运 了 6400 千克 ， 下午 每次 比 上午 多 运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7544", "content": "商场 上 有 一批 货 ， 第一天 运走 了 总数 的 30% ， 第 二 天运 的 比 总数 的 (1/5) 多 4 吨 ， 这时 还 剩 20 吨 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4515", "content": "修 一段 公路 ， 第一周 修 了 这 段 公路 的 25% ， 第 二 周 修 了 这 段 公路 的 (1/5) ， 两周 共 修 了 270 千米 ． 这 段 公路 全长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12857", "content": "一 个数 的 34 倍 是 884 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13824", "content": "一 张 铁皮 4 平方米 ， 第一次 剪 去 这块 铁皮 的 (3/5) ， 第 二 次 剪 去 这块 铁皮 的 (1/4) ， 还 剩 这块 铁皮 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11551", "content": "学校 绘画 兴趣小组 有 男生 28 人 ， 女生 24 人 ． 合唱队 的 人数 是 绘画 人数 的 3 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10934", "content": "李师傅 加工 一批 零件 ， 原 计划 每天 加工 50 个 ， 30 天 完成 ， 实际 每天 加工 60 个 ， 实际 几天 就 完成 了 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13725", "content": "修路 队 4 天 修 了 两段 公路 ， 第一段 长 430 米 ， 第 二 段长 26 米 ， 平均 每天 修 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9000", "content": "一 件 皮衣 原价 1200 元 ， 季节性 减价 40% ， 这件 皮衣 现价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "44", "content": "甲 仓 有 粮食 若干 ， 运出 3.5 吨 后 ， 剩下 的 比 运走 的 多 2.7 吨 ， 甲 仓 原来 存有 粮食 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4280", "content": "快速 部队 要 去 某地 执行 任务 ， 如果 每 小时 前进 30 千米 ， 需要 6 小时 到达 ； 现在 需要 在 4 小时 内 到达 ， 每 小时 至少 要 前进 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5807", "content": "图书馆 内 有 科技 书 2500 册 ， 相当于 文艺 书 的 (5/9) ， 文艺 书 的 数量 又 相当于 全部 书 的 (5/12) ， 这个 图书馆 共有 图书 多少 册 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20449", "content": "小 红 拿 着 20 元 去 买 书 ， 《 故事 大王 》 单价 5.50 元 ， 《 神秘 侦探 》 单价 12.45 元 ． 小 红 各 买 一本 ， 还 剩 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5049", "content": "一 列 货车 的 速度 是 72 千米 / 时 ， 6 小时 货车 可以 行驶 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3853", "content": "食堂 买来 一批 大米 ， 如果 每天 吃 24 千克 ， 够吃 10 天 ， 如果 每天 吃 20 千克 ， 这些 大米 能 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12566", "content": "一 本书 ， 李 明 每天 看 25 页 ， 14 天 可以 看 完 ． 如果 每天 看 35 页 ， 多少 天 能 看 完 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16082", "content": "工人 加工 一批 零件 ， (2/3) 小时 加工 了 这 批 零件 的 20% ， 照 这样 计算 ， 加工 完 这 批 零件 需 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9596", "content": "五年级 同学 栽树 1200 棵 ， 比 六年级 同学 栽树 棵 数 的 80% 还 少 160 棵 ， 六年级 同学 栽树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20332", "content": "125 与 0.3 的 积 比 0.13 / 52 的 商 少 多少 ？ （ 用 综合 算式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14182", "content": "笑笑 家 有 40 个 桔子 ， 每天 吃 5 个 ， 多少 天正 好吃 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "619", "content": "一 个数 除以 56 ， 余数 是 52 ， 这个 被除数 最少 再 加上 多少 就 没有 余数 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7693", "content": "车队 有 8 辆 汽车 ， 7 天 共 节约 179.2 升 ， 平均 每辆 汽车 一天 节约 汽油 多少 升 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19309", "content": "一 个 长方体 水缸 ， 长 10 分 米 ， 宽 8 分 米 ， 水深 4.5 分 米 ， 放入 一块 石头 ， 这时 水面 上升 到 6 分 米 ， 这块 石头 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1438", "content": "某校 六年级 参加 球类 比赛 的 有 72 人 ， 参加 田径比赛 的 人数 比 参加 球类 比赛 的 人数 少 25% ， 参加 田径比赛 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10309", "content": "一 个 工厂 要 生产 3000 个 零件 ， 前 6 天 生产 了 1000 个 零件 ， 如果 剩下 的 要 在 10 内 完成 ， 剩下 的 平均 每天 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3490", "content": "小 明 的 身高 1.4 米 ， 我 比 他 矮 0.1 米 ． 你 知道 我 的 身高 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4753", "content": "亮亮的 教室 在 4 楼 ， 每层 楼梯 有 22 级 台阶 ． 亮 亮 早晨 到 教室 上课 要 上 多少级 台阶 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16495", "content": "学校 图书室 有 20 个 书架 ， 每个 书架 有 5 层 ， 平均 每层 放 80 本书 ， 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20006", "content": "一 块 平行四边形 菜 地底 边长 24 米 ， 高 比 底边 少 25% ， 高 = 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21869", "content": "甲 数 是 60 ， 乙 数 是 甲 数 的 (4/5) ， 乙 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20511", "content": "李 叔叔 家 菜地 旁 挖 了 一个 水坑 ， 长 3 米 ， 宽 2 米 ， 深 4 米 ， 这个 水坑 的 占地面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16804", "content": "船营区 运动会 开幕式 由 20 支 检阅 队伍 组成 ， 每支 队伍 长 8 米 ， 队伍 之间 的 距离 都 是 10 米 ， 这 支 检阅 队伍 全长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9764", "content": "书架 的 上 、 中 、 下层 各 有 3 本 、 5 本 、 4 本 故事书 ． 若 要 从 每层 书架 上任 取 一个 本书 ， 共有 多少 种 不同 的 取法 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7939", "content": "张 名 看 一本 60 页 的 书 ， 第一天 看 了 这 本书 的 30% 多 10 页 ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13732", "content": "抗震救灾 中 ， 驻军 部队 两个 工程队 要 抢修 一段 长 约 201.5 米 的 堵塞 公路 ． 甲队 能 每天 抢修 15 米 ， 乙 队 能 每天 抢修 16 米 ， 两个 工程队 同时 抢修 ， 打通 这 条 公路 需要 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17410", "content": "操场上 站 着 一排 男同学 ， 一共 有 6 个 ， 在 每 两个 男同学 之间 站 2 个 女同学 ， 一共 站 了 多少 个 女同学 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8893", "content": "一 片 细木工板 约 3 平方米 ， 用 去 (2/5) 平方米 ， 还 剩下 多少 平方米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5658", "content": "一 本书 共 180 页 ， 小林 第一天 看 了 全书 的 30% ， 第 二 天 看 了 46 页 ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21163", "content": "一 袋 面 ， 第一次 用 了 总数 的 (1/3) ， 第 二 次 用 了 总数 的 (1/4) ， 这时 ， 用 去 的 比 剩下 的 多 3 千克 ， 这 袋 面 共有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3948", "content": "东方 小 开展 植树 活动 ， 五年级 植 了 114 棵 ， 是 三年级 的 2 倍 ， 四年级 植 的 比 三年级 多 32 棵 ， 四年级 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3046", "content": "火车 上 原有 680 人 ， 到 长沙 后 下去 了 258 人 ， 又 上来 了 189 人 ， 火车 上 现在 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10515", "content": "一 地砖 长 3 分 米 ， 宽 2 分 米 ， 那么 它 的 周长 = 多少 分 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1002", "content": "超大 农业 园 新 购买 了 一批 化肥 ， 每 袋 化肥 125 元 ， 刘 叔叔 买 了 78 袋 ， 还 剩 253 元 ， 他 一共 带 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15392", "content": "参加 田径比赛 的 人数 有 54 人 ， 比 参加 球类 比赛 的 人数 少 25% ． 参加 球类 比赛 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5929", "content": "火车 每 小时 行驶 150 千米 ， 3 小时 行驶 了 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5490", "content": "520 除以 多少 ， 商 是 23 ， 余数 是 14 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1341", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 的 比 全长 的 (2/5) 少 7 米 ， 还有 35 米 没 修 ， 这 条 水渠 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2867", "content": "粮店 运 来 一批 大米 ． 其中 上午 运 来 18 袋 ， 下午 又 运 来 25 袋 ， 下午 运 来 的 比 上午 多 35 千克 ． 如果 每 袋 大米 的 重量 相等 ， 那么 上午 运 来 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17318", "content": "男生 有 120 人 ， 比 女生 少 20% ， 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12354", "content": "武 广 高铁 原来 最高 速度 为 350 千米 / 时 ， 从 2011 年 7 月 1 日 起 ， 高铁 最高 速度 下降 了 (1/7) ． 武 广 高铁 现在 最高 时速 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15992", "content": "一 只 小羊 重 900 克 ， 一只 小猪 的 重量 是 一只 小羊 的 6 倍 ， 一只 小猪 重 多少 克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5289", "content": "学校 买来 排球 和 足球 各 12 个 ， 排球 每个 15 元 ， 足球 每个 25 元 ， 学校 买 足球 和 排球 共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19637", "content": "古印度 的 数学 谜题 ， 因 诗人 郎费罗 的 介绍 而 广为流传 ． 下面 用 现代 语言 叙述 一下 ： 一大群 蜜蜂 ， (1/5) 飞 向 菜花 ， (1/3) 飞往 莲花 ， 两 小群 蜜蜂 数量 之 差 的 3 倍 去 采 蜜 ， 还有 10 只 绕 着 樱花 飞 ． 蜜蜂 总数 = 多少 只 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "18165", "content": "农场 种植 西红柿 (2/3) 公顷 ， 黄瓜 的 种植 面积 是 西红柿 的 (4/5) ， 黄瓜 和 西红柿 一共 种植 了 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20253", "content": "一 辆 火车 装 了 20 吨 货物 ， 货物 总量 的 (4/5) 是 水产 ， 在 水产 中 黄鱼 占有 (5/8) ． 这辆 车 中 黄鱼 有 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13483", "content": "一 个 粮食 加工厂 碾 了 一批 大米 ． 已经 装满 96 袋 ， 每 袋 75 千克 ， 还 剩 2700 千克 没有 装袋 ． 把 这 批 大米 平均分 两批 运出 ， 一共 运出 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16098", "content": "甲 仓库 存粮 运出 (2/3) 和 乙 仓 同样 多 ， 原来 甲 仓库 比 乙 仓库 多 多少倍 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15742", "content": "一 艘 轮船 ， 从 甲 港 开往 乙 港 ， 每 小时 航行 25 千米 ， 8 小时 可以 到达 目的地 ． 从 乙 港 返回 甲 港 ， 每 小时 航行 20 千米 ， 几小时 可以 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18759", "content": "一 个数 除以 56 ， 商 是 10 ， 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17055", "content": "汽车 上山 的 速度 为 36 千米 / 小时 ， 行 5 小时 到达 山顶 ， 到 山顶 后 立即 按 原 路 下山 ， 速度 为 45 千米 / 小时 ． 汽车 上山 和 下山 共用 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5281", "content": "甲 数 是 35.03 ， 乙 数 是 甲 数 的 15 倍 再 加上 31.61 ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10101", "content": "一 个 长方体 玻璃缸 ， 从 里面 量 长 5 分 米 ， 宽 3 分 米 ， 现有 水 的 深度 是 1.5 分 米 ， 当 把 一个 石块 浸没 在 水中 时 ， 水 的 深度 为 2 分 米 ， 问 这个 石块 的 体积 = 多少 立方分米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2310", "content": "比 932 少 192 的 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9938", "content": "蚂蚁 王国 现存 粮食 195 袋 ， 每 只 蚂蚁 运 5 袋 ， 需要 多少 只 蚂蚁 才能 一次 运 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1582", "content": "一 个数 的 (2/3) 是 24 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16634", "content": "支援 非典 疫区 的 防治 工作 ， 学校 五年级 的 同学 捐款 400 元 ， 五年级 捐款 是 六年级 的 (7/8) ， 六年级 捐款 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8942", "content": "某 车间 加工 一批 零件 ， 每天 加工 35 个 ， 加工 了 5 天 后 ， 这 批 零件 还 剩下 (2/7) ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12967", "content": "2.2 与 0.2 的 和 除 于 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13245", "content": "小 芳 今年 5 岁 ， 3 年 后 ， 小 芳 幼儿园 的 李老师 比 小 芳 大 20 岁 ， 李老师 今年 多少岁 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6273", "content": "15 / 30 的 商 乘 (1/4) 与 (1/5) 的 差 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21126", "content": "根据 测定 ， 儿童 体内 的 水分 约 占 体重 的 (4/5) ， 幼儿园 的 小朋友 琳 琳 体内 约 有 24 千克 的 水 ， 那么 琳 琳 的 体重 为 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1386", "content": "盐水 中 盐 和 水 的 重量 的 比 是 1 ： 10 ， 那么 盐 的 重量 占 盐水 重量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10871", "content": "一 个 长方形 菜地 面积 是 68.4 平方米 ， 它 的 长 是 7.2 米 ． 这个 菜地 的 宽 多少 ？ ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17413", "content": "一 张 长方形 纸 的 (1/8) 涂 红色 ， (4/8) 涂 蓝色 ． 没 涂色 的 部分 占 这 张 长方形 纸 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7167", "content": "一 个 潜水员 原来 在 水下 11 米处 ， 先 浮 上 6 米 ， 又 下潜 3 米 ， 这时 他 在 水下 多少 米处 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23036", "content": "从 甲地 到 乙地 如果 乘车 要 用 2.1 小时 ， 如果 骑 自行车 ， 平均 每 小时 行 10.5 千米 ， 比 乘车 多 花 2.9 小时 ， 乘车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10748", "content": "一 列 火车 和 一辆 汽车 同时 从 甲地 开往 乙地 ， 火车 每 小时 行 90 千米 ， 汽车 每 小时 行 45 千米 ， 两车 同时 行驶 5 小时 ， 火车 比 汽车 多行 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8999", "content": "小 月 身高 135 cm ， 小强 的 身高 比 小 月 高 10 cm ， 小强 的 身高 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14716", "content": "某 游泳池 长 60 米 ， 宽 10 米 ， 扩建 后 长 不变 ， 宽 增加 到 15 米 ， 扩建 后 的 游泳池 面积 比 原来 增加 了 百分之几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17811", "content": "五年级 的 同学 去 参观 黄继光 纪念馆 ， 共用 去 3 小时 ， 其中 路上 用 去 的 时间 占 (1/5) ， 休息 的 时间 占 (1/6) ， 剩下 的 是 游览 时间 ， 游览 的 时间 占 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22818", "content": "1 台 织布机 每 小时 可 织布 (21/4) 米 ， 同样 的 4 台 织布机 织布 (13/3) 小时 ， 可以 织布 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5542", "content": "仓库 里 有 6 吨 钢管 ， 第一 工程队 领 去 总数 的 30% ， 第 二 工程队 领 去 (1/2) 吨 ， 还 剩 钢管 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3226", "content": "小汽车 有 36 辆 ， 大 汽车 比 小汽车 多 (1/9) ， 两种 车 共 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11468", "content": "学校 运动会 上 小 洁 跑 了 100 米 ， 相当于 全程 的 (1/4) ． 你 知道 小 洁 参加 的 是 哪个 跑步 比赛项目 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15241", "content": "小 明 看 一 本书 ， 第一天 看 了 24 页 ， 第 二 来看 了 36 页 ， 两天 正好 看 了 全书 的 (2/5) ． 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4834", "content": "某 工厂 2005 年产值 是 1750 万元 ， 比 原 计划 增加 25% ， 原 计划 产值 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17913", "content": "一 本书 已 看 了 (3/5) ， 没有 看 的 页数 是 这本 数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4620", "content": "已知 两个 因数 的 积 是 (5/8) ， 其中 一个 因数 是 (5/7) ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18972", "content": "一 套 衣服 ， 裤子 的 单价 是 125 元 ， 上衣 的 价钱 比 裤子 贵 (4/5) ， 这 套 衣服 一共 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21272", "content": "铁道兵 开凿 一个 长 168 m 的 山洞 ， 原 计划 24 天 完成 任务 ， 实际 比 原 计划 提前 4 天 完成 ． 实际 每天 比 原 计划 多 开凿 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16790", "content": "水果店 运 来 一批 橘子 和 苹果 ， 其中 橘子 重量 占 55% ， 苹果 比 橘子 少 65 千克 ， 两种 水果 共运 来 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11939", "content": "乌龟 的 爬行 速度 大约 每分钟 0.003 千米 ， 兔子 的 奔跑 速度 是 乌龟 的 280 倍 ， 兔子 的 奔跑 速度 是 每分钟 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5865", "content": "在 为 玉树 灾区 捐款 活动 中 ， 五年级 学生 捐款 312 元 ， 比 六年级 少 捐 (1/7) ， 六年级 学生 一共 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7283", "content": "王 叔叔 用 一辆 卡车 从 县城 出发 去 王 庄 乡 送 化肥 ． 去 时 的 速度 是 40 千米 / 时 ， 3 小时 到达 ， 返回 时 只用 了 2 小时 ， 这辆 卡车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11487", "content": "一 条 铁丝 3 米 ， 用 去 (2/3) 后 ， 又 用 去 (1/3) 米 ， 用 去 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11646", "content": "小 璐 、 小雨 、 小 玲 共有 327 张 卡片 ． 小 璐 给 了 小雨 3 张 卡片 ， 小雨 给 了 小 玲 2 张 卡片 ， 小 玲 给 了 小 璐 7 张 卡片 ， 此时 3 人 的 卡片 数 一样 ． 那么 小雨 原有 多少 张 卡片 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22171", "content": "世界 上 跑 得 最快 的 哺乳动物 是 猎豹 ， 它 的 时速 高 达 105 千米 ， 鸵鸟 速度 比 猎豹 慢 (1/3) ， 鸵鸟 的 时速 = 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7819", "content": "天津 到 济南 的 铁路 长 358 千米 ， 一列 客车 和 一列 货车 分别 从 两地 同时 出发 相向 而 行 ， 2 小时 后 相遇 ， 已知 客车 每 小时 行 105 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8366", "content": "甲 仓库 有 货 (1/4) 吨 ， 乙 仓库 有 货 (1/2) 吨 ， 丙 仓库 存货 比 甲乙 两 仓库 货物 总和 少 (3/5) ． 丙 仓库 有 货物 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15550", "content": "一 个 水果店 ， 上午 卖出 180 千克 苹果 ， 正好 是 下午 卖出 的 (2/3) ． 这个 水果店 在 这 一天 共 卖出 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20368", "content": "4.5 的 (4/5) - 1.5 ， 所得 的 差 再 除以 2.1 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7834", "content": "108 千克 花生 可 榨油 96 千克 ， 平均 一 千克 花生 能 榨油 多少 千克 ． （ 结果 用 最 简分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4905", "content": "小 李 以 1 元 钱 3 个 苹果 的 价格 买进 若干个 ， 又 以 2 元 5 个 卖出 ． 若 他 要 赚 得 10 元 钱 利润 他 应 卖 多少 个 苹果 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19802", "content": "一 卷 绳子 长 10 米 ， 做 跳绳 用 去 了 4.2 米 ， 捆 包裹 用 了 1.8 米 ， 这 卷 绳子 还 剩 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "689", "content": "一 种 电脑 原价 每 台 6500 元 ． 现在 搞 促销 ， 每 台 售价 5200 元 ， 现在 售价 比 原来 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16115", "content": "一 根 电线 长 2.5 米 ， 第一次 用 去 (1/5) ， 第 二 次 用 去 (3/5) 米 ， 还 剩 几米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8956", "content": "某人 步行 的 速度 为 每秒 2 米 ． 一列 火车 从 后面 开来 ， 超过 他 用 了 10 秒 ． 已知 火车 长 90 米 ． 求 火车 的 速度 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6317", "content": "一 块 正方形 地毯 的 4 周 需要 镶 一条 花边 ． 地毯 的 边长 为 4 米 ， 求 所 需 花边 长度 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20700", "content": "商店 运进 苹果 280 筐 ， 比 运进 的 梨 多 (2/5) ， 运进 的 梨 有 多少 筐 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10148", "content": "北京 奥运会 3 米 跳台 比赛 中 ， 亚军 哈特利 最后 一 跳 得 了 76.5 分 ， 但是 冠军 郭晶晶 的 这 一 跳 的 得分 要 比 哈特利 高 (2/17) ， 郭晶晶 最后 一 跳 得 了 几分 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9645", "content": "一 种 叫 水浮莲 的 水草 生长 很快 ， 每天 增加 1 倍 ， 2012 天 刚好 长满 池塘 ， 到 多少 天 刚好 长满 池塘 面积 的 一半 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13012", "content": "书店 有 一批 书 ， 第一天 卖出 的 比 这 批 书 的 (1/6) 少 15 本 ， 这时 还 剩下 总数 的 (7/8) ， 这 批 书 共有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12208", "content": "计算 ： 3.6 * （ 2.45 - 1.9 ） / 0.4 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10032", "content": "小 红 看 一 本书 ， 第一周 看 了 全书 的 10% ， 第 二 周 看 了 全书 的 (1/4) ， 还 剩 130 页 没 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16029", "content": "甲乙 两地 相距 935 千米 ， 小 明 以 每 小时 75 千米 的 速度 从 甲地 向 乙地 出发 ， 7 个 小时 之后 ， 距离 乙地 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19085", "content": "被减数 是 78 ， 减数 是 40 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2798", "content": "在 一条 公路 的 一侧 插 红旗 ． 每隔 5 米 插 一面 ， 且 两端 都 不 插 ， 一共 需要 红旗 100 面 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3548", "content": "30 是 一个 数 的 (3/4) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17548", "content": "两车 同时 从 a 到 b ， 甲 每 小时 行 80 千米 ， 乙 每 小时 行 72 千米 ， 乙 先行 0.5 小时 ， 甲 再 出发 ， 甲 行 几小时 追 上 乙 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6207", "content": "有 不同 的 语文 书 5 本 ， 数学 书 6 本 ， 英语书 3 本 ， 自然 书 2 本 ． 从中 任 取 一本 ， 共有 多少 种 取法 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20425", "content": "一 堆 水泥 ， 已经 用 去 70 袋 ， 剩下 的 水泥 比 原来 的 (1/4) 还 多 20 袋 ． 原来 这 堆 水泥 有 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22061", "content": "一 种 彩色 电视机 ， 现在 每 台 售价 1980 元 ， 比 原来 价格 降低 了 20% ， 原来 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9429", "content": "学校 买 回 一批 大米 ， 吃 了 总数 的 60% ， 还 剩 40 千克 没有 吃 ， 这 批 大米 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19496", "content": "苏宁 电器 商场 春节 搞 促销 活动 ， 将 一种 标价 为 5300 元 的 平板电视 打 0.85 销售 ， 这 台 平板电视 现在 只要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16445", "content": "新建 一条 生产线 ， 实际 投资 27 万元 ， 比 计划 节约 (1/10) ． 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16916", "content": "妈妈 今年 39 岁 ， 妈妈 的 年龄 是 小 红 3 倍 ， 小 红 今年 多少岁 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13147", "content": "汽车 配件厂 要 加工 2440 个 汽车零件 ， 原来 每天 加工 80 个 ， 工作 20 天 后 ， 每天 多 加工 40 个 ． 剩下 的 还要 加工 多少 天 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13920", "content": "小 明 家 离 火车站 很 近 ， 他 每天 都 能 根据 车站 大楼 的 钟声 起床 ． 车站 大楼 的 钟 ， 每 敲响 一下 延时 3 秒 ， 间隔 1 秒 后 再 敲 第 二 下 ． 假如 从 第一 下 钟声 响起 ， 小 明 就 醒 了 ， 那么 到 小 明确 切 判断 出 已 是 清晨 6 时 ， 前后 共 经过 了 多少 秒钟 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19235", "content": "王老师 要 买 一辆 汽车 ， 如果 分期付款 购买 要 加价 8% ， 如果 一次性 付清 可 享受 0.99 优惠 ． 王老师 算了算 ， 发现 分期付款 比 一次性 付款 购买 要 多付 7200 元 ． 请 你 算 出 这辆 车 的 原价 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12233", "content": "同学 们 表演 团体操 ， 原来 排成 24 行 ， 每行 有 20 人 ， 队形 变化 后 ， 排成 30 行 ， 每行 减少 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8588", "content": "《 爱 的 教育 》 这 本书 有 354 页 ． 李 梅 看 了 8 天 ， 还 剩下 98 页 ， 平均 每天 看 了 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21455", "content": "有 两个 粮食 仓库 ， 如果 第一个 仓库 运走 2500 千克 ， 两个 仓库 存粮 一样 多 ， 已知 第 二 个 仓库 存粮 原有 50200 千克 ， 原来 两个 粮库 共存 粮 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1935", "content": "甲乙 两车 同时 从 a 地 开往 b 地 ， 当 甲 车行 完全 程 的 (1/4) 时 ， 乙 车 离 b 地 还有 140 千米 ， 照 这样 的 速度 ， 当 甲 车 到达 b 地 时 ， 乙 车行 完全 程 的 (8/9) ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13676", "content": "文具店 有 600 本 练习本 ， 卖出 一些 后 ， 还 剩 4 包 ， 每包 25 本 ， 卖出 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15427", "content": "某种 树苗 的 成活率 在 75% ～ 80% 之间 ， 要 种 活 120 棵 ， 至多 需要 种 多少 棵 树 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17643", "content": "加工 一根 钢筋 ， 第一次 用 去 75% ， 第 二 次 用 去 (1/2) 米 ， 还 剩下 1.5 米 ． 这根 钢筋 原来 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11508", "content": "少年宫 的 舞蹈队 有 48 人 ， 乐器 队 有 27 人 ， 合唱队 的 人数 是 舞蹈队 和 乐器 队 的 总数 3 倍 ． 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1424", "content": "甲 、 乙 两地 相距 240 千米 ， 去 时 8 小时 到达 ， 返回 时 ， 每 小时 多行 10 千米 ， 几小时 到达 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7399", "content": "两个 数 相加 的 和 是 445 ， 如果 其中 一个 加数 增加 58 ， 另 一个 加数 减少 76 ， 这时 和 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1885", "content": "4 （ 1 ） 班 有 46 人 ， 其中 会 弹钢琴 的 有 30 人 ， 会 拉 小提琴 的 有 28 人 ， 则 这个 班 既 会 弹钢琴 又 会 拉 小提琴 的 至少 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4587", "content": "某 工厂 有 女职工 1008 人 ， 占 全厂 职工 的 (2/3) ， 全厂 职工 共有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17259", "content": "一 辆 自行车 原价 是 300 元 ， 今年 这种 自行车 降价 10% ， 今年 这辆 自行车 要 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21130", "content": "小 明 看 一本 故事书 ， 看 了 4 天 后 ． 这 本书 还有 (4/10) 没 看 完 ， 他 看 了 这 本书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13949", "content": "(3/5) 吨 的 (1/10) = 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18615", "content": "食堂 里 有 大米 4500 千克 ， 吃 了 1860 千克 后 又 买 了 2680 千克 ， 现在 食堂 里 有 大米 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10929", "content": "现 要 生产 225 辆 小汽车 ， 12 天 生产 216 辆 小汽车 ， 照 这样 计算 ， 至少 需要 多少 天 才能 完成 任务 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7448", "content": "六年级 学生 参加 植树 活动 ， 男生 植 了 160 棵 ， 女生 植 的 树 比 男生 的 (3/4) 多 5 棵 ． 六年级 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "23117", "content": "暑假 快 到 了 ， 爸爸 打算 给 小 红 买 双 运动鞋 和 一根 跳绳 锻炼身体 ． 一双 运动鞋 38.5 元 ， 一根 跳绳 4.8 元 ， 付给 售货员 50 元 钱 ， 还 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6312", "content": "一 辆 汽车 从 甲地 到 乙地 ， 第一 小时 行 75 千米 ， 第 二 小时 行 了 第一 小时 的 (2/3) ， 两 小时 正好 行 了 全程 的 (4/7) ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2328", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 第一 小时 行 了 全程 的 (1/4) ， 第 二 小时 行 了 剩余 路程 的 (2/5) ， 第 3 小时 比 第一 小时 多行 (3/10) ， 离 乙 城 还有 30 千米 ． 甲乙 两成 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "13225", "content": "肖 雨 妈妈 的 月工资 是 2088 元 ． 按规定 ， 月 收入 超过 2000 元 的 ， 超过 部分 要 缴纳 5% 的 个人所得税 ． 肖 雨 妈妈 的 税后 工资 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13615", "content": "一 个 减法 算式 里 ， 减数 是 78 ， 被减数 是 326 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18770", "content": "商店 卖出 66 个 黄 气球 ， 卖出 的 红 气球 比 黄 气球 的 3 倍 少 42 个 ． 卖出 多少 个 红 气球 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18514", "content": "50 的 2% / 30 个 (1/5) ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8472", "content": "果园 里 有 苹果树 56 棵 ， 梨树 比 苹果树 多 18 棵 ， 橘子 树 的 棵 数 等于 苹果树 和 梨树 总 棵 数 的 2 倍 ． 橘子 树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14733", "content": "30 人 吃饭 ， 1 人 一个 饭碗 ， 2 人 一个 菜 碗 ， 3 人 一个 汤碗 ， 一共 要 准备 多少 个 碗 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7206", "content": "6 千米 的 (2/5) 是 4 千米 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13464", "content": "一 块 平行四边形 地 ， 底 是 150 m ， 高 是 60 m ， 共 收 小麦 6300 kg ， 平均 每平方米 收 小麦 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19099", "content": "一 辆 客车 4 小时 行 了 232 千米 ， 照 这样 的 速度 ， 再行 6 小时 ， 一共 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5663", "content": "一 辆 客车 从 甲地 开往 乙地 ， 0.8 小时 行 了 全程 的 (1/5) ， 行 了 全程 的 (1/2) 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20395", "content": "一 个 长方体 容器 长 13 厘米 ， 宽 9 厘米 ， 里面 装有 14 厘米 高 的 水 ， 把 一个 苹果 完全 放进 水中 ， 水面 上升 了 2 厘米 ， 这个 苹果 的 体积 有 多 大 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "695", "content": "甲 、 乙 两 人 的 速度 的 比 是 7 ： 5 ， 如果 甲乙 分别 从 a 、 b 两地 沿 同一 线路 相向 而 行 ， 甲 追 上 乙 需要 4 小时 ， 如果 相向 而 行 多少 小时 相遇 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2048", "content": "一 列 客车 和 一列 货车 同时 从 相距 270 千米 的 甲 、 乙 两地 相向 开出 ， 3 小时 后 两车 之间 相遇 ， 客车 和 货车 的 速度 比 是 5 ： 4 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14138", "content": "妈妈 买 回 大米 20 千克 ， 面粉 15 千克 ， 共用 去 85 元 ， 已知 大米 每千克 2.6 元 ， 面粉 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13192", "content": "甲乙 两 人 同时 从 相距 3000 米 的 两地 相向 而 行 ， 甲 每分钟 行 70 米 ， 乙 每分钟 行 80 米 ． 一只 小狗 与 甲 一起 出处 ， 每分钟 跑 100 米 ， 狗 与 乙 相遇 后 立即 掉头 向 甲 跑 去 ， 遇到 甲 后 又 向 乙 跑 去 ， 如此 反复 直到 两 人 相遇 ， 这 只 狗 跑 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10463", "content": "陕西 的 兵马俑 被称作 “ 世界 8 大 奇迹 ” 之一 ， 共有 8000 件 陶俑 ， 其中 步兵 俑 占 陶俑 总数 的 40% ， 其他 陶俑 有 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5145", "content": "某 饲养场 中 养鸡 250 只 ， 养鸭 的 只 数 是 鸡 的 3 倍 ， 鸡 、 鸭 总数 比 养 鹅 的 只 数多 70 只 ． 养 鹅 多少 只 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19992", "content": "一 种 小麦 的 出粉率 是 85% ， 现 要 磨 出 340 千克 面粉 ， 需要 这种 小麦 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21607", "content": "一 位 同学 15 分钟 抄写 一篇 作文 的 (3/5) ， 照 这样 的 速度 ， 全部 抄 完 需要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1047", "content": "育英 小学 合唱队 有 136 名 学生 ， 而 体操队 的 学生 人数 是 合唱队 的 3 倍 ． 请问 育英 小学 体操队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "505", "content": "果品 公司 购进 苹果 5000 千克 ， 每千克 的 进价 是 0.98 元 ， 损耗 2% ， 全部 销售 后 希望 得到 15% 的 利润 ． 请 你 帮 营业员 阿姨 算 一 算 ， 每千克 苹果 的 零售价 至少 要 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "9060", "content": "已知 两个 因数 的 积 是 116.5 ， 如果 其中 一个 因数 是 8 ， 那 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4718", "content": "某 水果 批发商 买进 一批 水果 ， 卖出 240 千克 ， 还 剩 (2/5) ， 买来 的 水果 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7130", "content": "丁丁 读 一 本书 ， 已经 读 了 (1/2) ， 再 读 54 页 就 读完 了 全书 的 80% ． 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4419", "content": "小 图书室 有 文艺 书 96 本 ， 故事书 的 本 数 是 文艺 书 的 (2/3) ， 科技 书 的 本 数 是 故事书 的 (1/4) ． 科技 书 有 多少 本 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13116", "content": "一 批 零件 ， 第一天 加工 了 总数 的 (1/3) ， 第 二 天 加工 了 总数 的 20% ， 这时 还 剩 210 零件 没有 加工 ． 这 批 零件 一共 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4843", "content": "一 件 商品 原价 1200 元 ， 现在 打 0.8 出售 ， 比 原价 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21217", "content": "丽丽 参加 新年 晚会 ， 她 有 3 件 上衣 ， 2 条 裙子 ， 一共 有 多少 种 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4600", "content": "菜市场 运 来 (4/5) 吨 西瓜 ， 运 来 的 甜瓜 比 西瓜 的 (3/4) 还要 少 (1/2) 吨 ， 运 来 甜瓜 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19138", "content": "一 批 货物 分 两次 运 完 ， 第一次 运 了 (1/3) 又 12 吨 ， 第 二 次 运 了 20 吨 ． 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20434", "content": "红领巾 影院 可以 容纳 500 人 ， 红星 小学 学生 全部 入座 后 还 剩 3 排空 座位 ， 每排 38 个 座位 ， 红星 小学 一共 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12548", "content": "有 两块 一样 长 的 木板 ， 各 长 130 厘米 ， 中间 钉 在 一起 成 了 一块 长 木板 ， 中间 钉 在 一起 的 重叠 部分 是 10 厘米 ， 则 这块 长 木板 的 长度 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6082", "content": "一 所 小学 有 男生 250 人 ， 女生 比 男生 的 2 倍 少 100 人 ， 这 所 学校 的 女生 比 男生 多 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14636", "content": "一 个 篮球 80 元 ， 一个 排球 是 一个 篮球 的 (3/5) ， 一个 排球 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8586", "content": "学校 购进 85 套 桌椅 ． 每张 桌子 57 元 ， 每 把 椅子 23 元 ． 学校 购买 这些 桌椅 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21307", "content": "小强 在 银行 里 储蓄 1200 元 ， 取出 一部分 捐献 给 灾区 ， 还 剩 (5/6) ， 他 捐献 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19993", "content": "一 个 水缸 的 内 底 面积 为 300 cm ^ 2 ， 高 20 cm ． 现在 放入 一个 棱 长 10 cm 的 正方体 铅块 ， 然后 把 水 加满 ． 当 铅块 从 水缸 中 取出 时 ， 缸 中 的 水 还 有多深 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15910", "content": "学校 生物 小组 制作 植物 标本 37 件 ， 制作 的 植物 标本 比 昆虫 标本 的 2.5 倍 少 3 件 ， 生物 小组 制作 的 昆虫 标本 有 多少 件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22844", "content": "一 个 建筑工地 9 月份 用 水泥 34 吨 ， 其中 下半月 用 的 水泥 是 上 半月 的 (8/9) ． 上 半月 用 水泥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22342", "content": "一 款 3 g 手机 原价 3000 元 ， 现在 0.85 出售 ， 现在 比 原来 价格便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22357", "content": "有 14 排 学生 体操 表演 ， 每排 人数 相同 ． 小 红 站 在 第 3 排 ， 从 左 数 ， 她 是 第 6 个 ； 从 右 数 ， 她 是 第 9 个 ． 请问 ： 一共 有 多少 个 学生 进行 体操 表演 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11818", "content": "78 个 105 = ， 积 的 最高 位 = 多少 位 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5810", "content": "商店 里 有 760 箱 矿泉水 ， 上午 卖出 172 箱 ， 下午 卖出 204 箱 ， 还 剩 多少 箱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10373", "content": "羊 有 200 只 ， 是 肉牛 头数 的 (5/9) ， 卖掉 肉牛 总数 的 (3/4) ， 还 剩下 多少 头 肉牛 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5164", "content": "一 个 棱 长 是 20 厘米 的 正方体 容器 里 装满水 ， 再 将 一个 西瓜 轻轻 放入 浸没 在 水中 ， 然后 取出 ， 这时 水面 高度 是 11 厘米 ， 求 这个 西瓜 的 体积 ． （ 不计 水 损失 ）", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16344", "content": "同学 们 去 参观 科技馆 ， 四年级 去 了 45 人 ， 五年级 去 的 人数 比 四年级 的 3 倍 多 12 人 ． 两个 年级 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15099", "content": "一 根 铁丝 ， 第一次 用 去 了 (1/3) ， 第 二 次 比 第一次 多用 了 6 米 ， 还 剩 34 米 没用 ， 这根 铁丝 全长 有 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4442", "content": "爸爸 把 3000 元 存入 银行 ， 定期 3 年 ， 如果 年利率 是 4.14% ， 到期 时 他 本息 共 可 取出 多少 元 ． （ 暂免 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6818", "content": "笑笑 要 看 一本 240 页 的 书 ， 已经 看 完 了 148 页 ， 剩下 的 如果 想 在 4 天 内 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3100", "content": "一 根 绳子 长 10 m ， 截去 (1/5) 后 ， 又 接上 5 m ， 这根 绳子 现在 长 多少 m ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16633", "content": "袋子 里 有 除 颜色 外 完全相同 的 黄 球 7 个 ， 蓝球 3 个 ， 闭上眼睛 从 袋子 中 摸 出 一个 球 ， 摸 出 黄 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4132", "content": "下河 乡 组织 了 挖土 队 和 运土 队 进行 兴修 河道 ． 挖土 队 的 人数 是 两个 队 人数 的 (5/8) ， 后 因 工作 需要 ， 从 挖土 队 调 90 人 到 运土 队 后 ， 挖土 队 与 运土 队 人数 的 比 是 2 ： 3 ， 两队 共有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21818", "content": "一 种 书 原价 为 19.8 元 ， 现在 降价 15% ， 现在 买 这 本书 应付 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3319", "content": "计算 ： 6.8 * (8/25) + 0.32 * 4.2 - 8 / 25 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10663", "content": "5 * (3/10) 再 加上 (1/4) ， 所得 的 和 除以 8 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6218", "content": "85 比 32 与 27 的 和 多 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13477", "content": "一 辆 汽车 4 天 节约 汽油 40.8 升 ， 平均 每天 节约 多少 升 汽油 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10473", "content": "商店 运 来 5 箱 乒乓球 ， 每箱 8 盒 ． 每盒 装 12 个 ， 一共 运 来 多少 个 乒乓球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9855", "content": "王 阿姨 到 菜场 买 了 (2/5) 千克 的 白菜 ， 用 去 (3/5) 元 ． 每千克 白菜 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15385", "content": "小 华 2008 年 6 月 1 日 把 4000 元 存入 银行 ， 整存整取 一年 ， 年利率 是 2.52% ， 准备 到期 后 把 税后 利息 捐给 四川 地震 灾区 ， 支援灾区 重建 ， 算 一 算 ， 存款 到期 时 小 华 可以 捐出 多少 元 钱 ？ （ 利息 税率 是 5% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20001", "content": "甲乙 两地 相距 2006 千米 ， 客车 和 货车 同时 从 两地 相对 开出 ， 相向 而 行 ， 12 小时 后 两车 还 相距 200 千米 ， 已知 货车 每 小时 行 60 千米 ， 则 客车 每 小时 行 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20534", "content": "一 个数 的 75% 是 60 ， 这个 数 的 (5/8) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20424", "content": "粮店 运进 920 千克 大米 ， 第一天 卖 了 360 千克 ， 第 二 天 卖 了 340 千克 ， 现在 还 剩 多少 千克 大米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1884", "content": "来 安 村 今年 栽种 柳树 120 棵 ， 是 栽种 槐树 的 (6/7) ， 槐树 又 是 杨树 的 (2/5) ． 今年 栽 杨树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13890", "content": "全校 有 1000 学生会 跳舞 或 唱歌 ， 其中 会 唱歌 的 750 人 ， 既 会 唱歌 又 会 跳舞 的 200 人 ， 那么 会 跳舞 的 为 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15630", "content": "被除数 是 8.9 ， 除数 是 0.5 ， 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4900", "content": "张 大爷 养 了 210 只 鹅 ， 鹅 的 只 数 是 鸭 的 (3/10) ． 养 了 多少 只 鸭 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9863", "content": "一 个数 的 (5/6) 与 40 的 (5/8) 相等 ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2140", "content": "原有 男 、 女同学 325 人 ， 新学年 男生 增加 25 人 ， 女生 减少 5% ， 总 人数 增加 16 人 ， 那么 现有 男同学 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17531", "content": "某 电器厂 4 月份 计划 生产 春兰 空调 350 台 ， 实际 比 计划 多 生产 70 台 ， 实际 增产 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7178", "content": "若 7 千克 甲种 茶叶 的 价钱 等于 5 千克 乙种 茶叶 的 价钱 ， 那么 3 千克 甲种 茶叶 的 价钱 = 多少 千克 乙种 茶叶 的 价钱 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21169", "content": "小 明 家用 地板砖 铺设 客厅 ， 每块 地砖 边长 0.8 米 ， 那么 铺设 16 平方米 需 多少 块 地砖 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10093", "content": "甲 、 乙 两车 同时 从 a 地 开往 b 地 ， 当 甲 车行 了 全程 的 (1/3) 时 ， 乙 车行 了 60 千米 ， 两车 的 速度 保持 不变 ， 当 甲 车 到达 终点 时 ， 乙 车 共 行 了 全程 的 (3/4) ． a 、 b 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23128", "content": "一 根 电线 全长 32 米 ， 第一次 用 去 了 全长 的 20% ， 第 二 次 用 去 了 全长 的 (7/10) ． 两次 共用 去 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1267", "content": "李 军 家 有 68 只 鸡 ， 正好 是 羊 的 数量 的 2 倍 ． 李 军 的 鸡 和 羊 共有 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4629", "content": "比 7 的 8 倍 还 多 158 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18292", "content": "一 列 火车 8 小时 行驶 704 千米 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20588", "content": "李 大爷 开 农用车 到 城里 买 化肥 ， 去 的 时候 每 小时 是 40 千米 ， 用 了 3 个 小时 到 城里 ， 回来 时 用 了 4 小时 ， 回来 时 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3893", "content": "学校 图书室 有 9 个 同样 的 书柜 ， 每个 书柜 有 4 层 ， 平均 每层 放 250 本书 ． 学校 图书室 一共 摆放 了 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14568", "content": "强强 从 学校 去 街心公园 ， 每 小时 走 4.8 千米 ， 0.5 小时 可以 到达 ； 如果 每 小时 只 走 3.2 千米 ， 要 多少 小时 才能 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "826", "content": "学校 买来 15 套 桌椅 ． 桌子 每张 68 元 ， 椅子 每 把 34 元 ． 学校 买 这些 桌椅 共用 去 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20699", "content": "果园 里 摘 了 2400 个 苹果 ， 每 25 个 装 一袋 ， 每 4 袋装 一箱 ， 一共 可以 装 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8630", "content": "一 个 平行四边形 的 底 是 24 分 米 ， 底 上 的 高 是 8 分 米 ， 这个 平形四边 形 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11137", "content": "野牛 的 体重 是 630 kg ， 大象 的 体重 是 野牛 的 8 倍 ， 大象 的 体重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "879", "content": "水果店 运进 38 筐 水果 ， 每 筐 25 千克 ． 卖出 280 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7133", "content": "学校 图书馆 买来 文艺 书 476 本 ， 比 科技 书 的 3 倍 多 92 本 ， 两种 书 一共 有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22108", "content": "计算 ： 25 * 32 * 125 =", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "974", "content": "同学 们 沿 笔直 的 操场 一侧 插 彩旗 ， 每隔 4 米 插 一面 ， 一共 插 了 26 面 ， 从 第 1 面 彩旗 到 最后 一面 的 距离 有 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16870", "content": "鸵鸟 的 速度 是 72.8 千米 / 时 ， 非洲 野狗 的 速度 是 56 千米 / 时 ， 鸵鸟 1.5 小时 跑 的 路程 ， 非洲 野狗 需要 几小时 才能 跑 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20688", "content": "有 一桶 油 ， 第一次 取出 (2/5) ， 第 二 次 取出 (1/3) ， 桶 里 还 剩 20 千克 ， 这 桶 油 原来 有 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8404", "content": "学校 运 来 240 棵 树苗 ， 按 5 ： 4 ： 3 分配 给 甲 、 乙 、 丙 3 个 班级 ， 丙 班 分 到 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10380", "content": "甲乙 两 人 从 a 地 到 b 地 办事 ， 甲 骑 自行车 ， 每 小时 行 15 千米 ； 经过 1.6 小时 后 ， 乙 骑 摩托车 从 a 地 出发 ， 经过 0.4 小时 追 上 了 甲 ． 乙 骑 摩托车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21356", "content": "某 工厂 的 女工 人数 是 男 工人 的 80% ． 因 工作 需要 ， 又 调入 女工 30 人 ， 这时 女工 人数 比 男工 多 10% ． 这个 工厂 有 男 工人 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11553", "content": "一 个 长方体 蓄水池 长 20 米 ， 宽 2 米 ， 深 3 米 ， 它 的 占地面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9433", "content": "希望 小学 有 学生 450 人 ， 女生 人数 是 男生 人数 的 (4/5) ， 君 武 小学 男生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23150", "content": "图书室 新 买来 50 本 科技 书 ， 新 买来 的 故事书 是 科技 书 的 5 倍 ， 两种 书 共有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13719", "content": "李 双 将 爷爷 给 的 500 元 存入 银行 ， 定期 2 年 ， 年利率 是 2.43% ， 到期 后 李 双 应 取回 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12005", "content": "工程队 要 挖 一段 第 565 米 的 水沟 ， 已经 挖 了 502 米 ． 剩下 的 每天 挖 7 米 ， 还要 挖 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16749", "content": "果园 有 桃树 280 棵 ， 正好 是 梨树 的 (4/5) ． 梨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5925", "content": "5 个 0.01 和 6 个 1 组成 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "712", "content": "把 含盐 60% 的 盐水 中 ， 加入 一些 水 后 变成 了 含盐 30% 的 盐水 ， 这时 盐水 的 重量 是 300 克 ， 原来 有 盐水 多少 克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21871", "content": "李 阿姨 买 了 6 箱 苹果 ， 每箱 24 千克 ， 每千克 2.5 元 ， 一共 要 花 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16899", "content": "太子 山 水泥厂 要 生产 3600 吨 水泥 ， 原 计划 用 60 天 ， 实际 只用 了 40 天 就 完成 了 任务 ． 实际 平均 每天 比 计划 每天 多 生产 多少 吨 水泥 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3062", "content": "春天 学校 图书馆 有 658 本 图书 ， 小学部 借 走 了 263 本 ， 中学部 借 走 了 137 本 ， 问 春天 学校 还有 多少 本 图书 没有 销售 完 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14579", "content": "修路 队 修 一条 路 ， 第一天 收 了 全长 的 (1/5) ， 第 二 天 修 了 45 m ， 两天 共 修 了 100 m ， 这 条 路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7556", "content": "小 明 上山 时 每 小时 行 3 千米 ， 原 路 返回 时 每 小时 行 5 千米 ， 求 小 明 往返 的 平均速度 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13488", "content": "利民 超市 玩具 柜台 购进 了 150 个 溜溜球 ， 每个 卖 25 元 ， 全部 卖出 后 赚 了 600 元 ， 每个 溜溜球 的 进价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21097", "content": "一 个 班 男生 占 全班 的 (3/5) ， 女生 是 男生 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22683", "content": "小 明 集 纪念邮票 204 张 ， 特种邮票 340 张 ， 他 集邮 的 张 数 是 他 妹妹 的 17 倍 ． 他 妹妹 集邮 多少 张 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5750", "content": "一 辆车 从 甲地 开往 乙地 ， 上午 行 了 200 千米 ， 下午 行 了 250 千米 ， 还 剩 (1/10) 没 行 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18930", "content": "张老师 带 50 元 钱 去 买 奖品 ， 2.4 元 的 奖品 买 了 18 份 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "48", "content": "一 个 水果店 运 一批 水果 ． 第一次 运 了 50 千克 ， 第 二 次 运 了 70 千克 ， 两次 正好 运 了 这 批 水果 的 (1/4) ， 这 批 水果 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17579", "content": "长青 小学 四年级 278 人 去 儿童 大 剧院 看 电影 ， 全部 入座 后 还有 6 排空 座位 ， 每排 48 个 座位 ． 这个 儿童 大 剧院 一共 可以 坐 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21193", "content": "a 、 b 两 数 的 比 是 5 ： 9 ， 如果 a = 30 ， 那么 ， b = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15146", "content": "六年级 有 女生 100 人 ， 男生 比 女生 少 3% ． 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21810", "content": "把 一个 小数 扩大 100 倍 得 735 ， 这个 小数 原来 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1763", "content": "小 明 每分钟 跳绳 120 下 ， 小强 跳 的 是 小 明 的 (5/8) ， 小强 每分钟 跳绳 多少 下 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5198", "content": "一 本书 120 页 ， 第一天 看 了 全书 的 (1/4) ， 第 二 天 看 了 20 页 ， 两天 共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21195", "content": "火车 每 小时 行 108 千米 ， 飞机 的 速度 是 火车 的 9 倍 ， 飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22745", "content": "乐乐 书店 有 婴儿 画报 205 本 ， 儿童 画报 是 婴儿 画报 的 3 倍 ， 两种 画报 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14127", "content": "在 一次 跳远 比赛 中 ， 尹 星 跳 了 3.5 米 ， 刘 强 比 尹 星 少 跳 0.46 米 ， 肖 平 比 刘 强 多 跳 0.35 米 ， 肖 平 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22877", "content": "汽车 从 甲地 开往 乙地 ， 每 小时 行 40 千米 ， 3 小时 后 剩下 的 路程 比 全程 的 一半 少 8 千米 ． 如 改用 每 小时 52 千米 的 速度 行驶 ， 再行 几小时 到达 乙地 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14532", "content": "一 小袋 糖 重 (1/8) 千克 ， 一大 袋 糖 重 (4/8) 千克 ， 一 小袋 糖 比 一大 袋 糖 轻 几分 之 几千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15818", "content": "在 一次 中国象棋 比赛 中 ， 一共 有 6 名 运动员 参加 比赛 ． 如果 每 2 名 运动员 之间 都 要 进行 一场 比赛 ， 一共 要 比赛 多少 场 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8106", "content": "甲乙 两根 同样 长 钢管 ， 如果 把 甲 截 (1/5) 接到 乙 管 上 ， 这时 乙 管长 9 米 ． 原来 乙 管长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7080", "content": "一 件 衣服 打 0.9 出售 是 270 元 ， 这件 衣服 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12036", "content": "广 洋 湖 镇 中心小学 修筑 一条 长 400 米 的 环形 塑胶跑道 ， 已经 完成 了 130 米 ， 剩下 的 要 在 30 天 内 完成 ， 平均 每天 要 修筑 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8922", "content": "甲 、 乙 两车 同时 从 两地 相对 开出 ， 4.5 小时 相遇 ． 甲 车 每 小时 行 36 千米 ， 乙 车 每 小时 行 的 路程 是 甲 车 的 1.4 倍 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15489", "content": "张师傅 把 一根 木头 锯 成 3 段 需要 6 分钟 ． 如果 把 它 锯 成 8 段 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3250", "content": "据 有关 资料 显示 ， 回收 1 千克 废纸 可 生产 0.8 千克 再生纸 ． 在 这 学期 学校 开展 的 “ 节约 一张 纸 ” 活动 中 ， 五年级 二 班 的 40 名 学生 ， 平均 每人 回收 废纸 1.5 千克 ． 这个 班 回收 的 废纸 可 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14734", "content": "3 、 四年级 的 同学 去 植树 ， 三年级 有 58 人 ， 四年级 有 67 人 ． 5 名 同学 分为 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20142", "content": "一 件 商品 ， 现价 42 元 ， 比 原来 降价 12.5% ， 原来 的 售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8016", "content": "甲乙 两地 相距 450 千米 ， 客车 和 货车 同时 从 两地 相对 开出 5 小时 相遇 ， 已知 客车 每 小时 行 48 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3051", "content": "体育老师 买来 5 箱 乒乓球 ， 每箱 有 6 筒 ， 每 筒 有 12 个 ， 一共 买来 多少 个 乒乓球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14623", "content": "为 迎 校庆 ， 同学 们 做 了 24 面 黄旗 ， 是 红旗 的 60% ， 红旗 做 了 多少 面 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7797", "content": "一 种 大豆 120 千克 可 榨油 30 千克 ． 照 这样 计算 ， 榨 1 千克 油 需要 大豆 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16151", "content": "有 5 升 波萝 汁 ， 把 它 灌入 能 装 (1/4) 升 的 小瓶 里 ， 可以 灌 多少 瓶 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9064", "content": "小 刚 家 买来 一袋 面粉 ， 吃 了 18 千克 ， 正好 是 这 袋 面粉 的 (3/4) ， 这 袋 面粉 还 剩 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7374", "content": "购物中心 玩具 柜 购进 了 80 个 溜溜球 ， 每个 售价 25 元 ， 全部 卖出 后 赚 了 400 元 ． 每个 溜溜球 的 进价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16631", "content": "学校 图书室 有 连环画 2500 本 ， 比 故事书 的 6 倍 还 多 100 本 ， 故事书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1049", "content": "装配车间 要 装 460 台 电脑 ， 前 2 天 平均 每天 装 50 台 ， 剩下 的 要 6 天 全部 完成 ， 平均 每天 装 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9559", "content": "12 / 600 的 商 加上 400 的 和 是 90 的 多少倍 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9837", "content": "一 列 火车 从 瑞安 开往 上海 ， 行 了 全程 的 (3/5) ， 离 瑞安 450 千米 ， 瑞安 到 上海 全程 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6122", "content": "6 个 同学 排成 一排 做操 ， 每 两个 同学 之间 相隔 2 米 ， 队伍 一共 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2368", "content": "把 45.5 平均 分成 5 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11009", "content": "甲乙 两堆 煤 共 重 18 吨 ， 甲 堆 煤 的 (1/4) 等于 乙 堆 煤 的 (1/5) ， 甲 堆 煤 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17360", "content": "有 一袋 米 ， 第一周 吃 了 12 千克 ， 第 二 周 吃 了 40% ， 还 剩下 6 千克 ． 这 袋 米 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7402", "content": "红 云 牧场 有 奶牛 360 头 ， 比 肉牛 头数 少 (5/9) ． 红 云 牧场 有 肉牛 多少 头 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7345", "content": "1 + 2 + 3 + 6 + 12 + 24 + 48 + 96 + 192 + 384 = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "21579", "content": "学校 将 图书 借给 45 个 班 ， 平均 每班 借 136 本 ， 还 剩下 880 本 ， 学校 共有 图书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4322", "content": "某村 去年 种 玉米 240 公顷 ， 今年 比 去年 多种 20% ， 今年 种 玉米 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11243", "content": "学校 举行 广播操 表演 ． 3 、 4 、 五年级 各 有 3 个 班 ， 每班 选 20 人 参加 ． 参加 表演 的 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17775", "content": "小 明 和 小 军 在 学校 环形 跑道 上 跑步 ， 两 人 从 同 一点 出发 ， 反向而行 ， 小 明 每秒 跑 4 米 ， 小 军 每秒 跑 6 米 ， 经过 60 秒 两 人 相遇 ， 跑道 的 周长 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "142", "content": "王老师 买 8 个 足球 花 了 360 元 ， 李老师 买 同样 的 足球 花 了 540 元 ， 李老师 买 了 几个 足球 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14252", "content": "一 堆 煤 用 去 (1/6) 后 ， 还 剩 150 吨 ， 这 堆 煤 的 20% = 多少 吨 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5669", "content": "商场 运 来 4 吨 桃子 ， 运 来 西瓜 的 重量 是 桃子 的 (3/8) ， 运 来 西瓜 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18384", "content": "4 * 8 + 9 先 算 多少 ， 再 算 多少 ， 得数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5190", "content": "小张 正在 画 一本 漫画 ， 已经 画 完 的 比 全部 的 25% 还 多 12 页 ， 这时 画 完 的 页数 与 未 画 的 比 是 2 ： 3 ． 这本 漫画 预计 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14952", "content": "有 一块 长 14 厘米 ， 宽 9.8 厘米 ， 高 3 厘米 的 铁块 ， 浸没 在 一个 长方形 的 油箱 中 ． 取出 铁块 后 ， 油 的 高度 下降 了 1.2 厘米 ． 这个 长方体 油箱 的 底 面积 = 多少 平方厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7812", "content": "玲玲 设计 了 一个 “ 摸奖 ” 活动 方案 ． 如果 要 使 每个 同学 获奖 的 可能性 为 (1/4) ， 她 先 往 盒子 里 放进 2 张 “ 有奖 ” 的 纸条 ， 还要 往 盒子 里 放进 多少 张 “ 无 奖 ” 的 纸条 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11716", "content": "回收 1 吨 废纸 ， 能 造 出新 纸 820 千克 ． 一个 回收站 回收 废纸 27 吨 ， 可以 造 出新 纸 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21331", "content": "丁丁 去 南山 游玩 ， 上坡 用 了 20 分钟 ， 平均 每分钟 走 35 米 ； 下坡 用 了 10 分钟 ， 平均 每分钟 走 50 米 ． 丁丁 从 家 到 南山 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1006", "content": "4 门 功课 的 总分 是 380 分 ， 则 平均分 = 多少 分 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10626", "content": "一 个 梯形 的 上 底 与 下 底 的 和 是 20 cm ， 梯形 的 高 是 8 cm ， 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22228", "content": "甲乙 两 军舰 同时 从 两个 巷口 相对 开出 ． 甲 军 舰队 每 小时 行 48 千米 ， 乙 军舰 的 速度 是 甲 军舰 的 (2/3) ， 4 小时 两 军舰 相遇 ， 两个 巷口 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20951", "content": "商场 为 迎接 “ 十一 ” 黄金周 ， 所有 的 商品 降价 (1/5) 销售 ． 一件 大衣 降价 后 卖 640 元 ， 这件 大衣 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21054", "content": "学校 组织 植树 劳动 ， 平均 每人 植树 4 棵 ． 一班 有 学生 42 人 ， 二 班 有 学生 38 人 ， 两个 班 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9189", "content": "学校 买来 一批 图书 ， 如果 每班 分 20 本 ， 可以 分给 9 个 班 ， 现在 需要 分给 10 个 班 ， 每班 只能 分 到 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3432", "content": "一 堆 煤 重 (4/5) 吨 ， 用 去 了 (1/5) 吨 ， 还 乘 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12944", "content": "箱 里 放 着 同样 个数 的 铅笔盒 ， 如果 从 每 只 里 拿出 60 个 ， 那么 5 只 箱 里 剩下 铅笔盒 的 个数 的 总和 等于 原来 2 只 箱 里 个数 的 和 ． 原来 每 只 箱 里 有 多少 个 铅笔盒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17806", "content": "一 个 因数 是 406 ， 另 一个 因数 是 25 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18755", "content": "(1/2) + (1/4) + (1/8) + (1/16) + (1/32) + (1/64) + (1/128) + (1/256) + (1/512) + (1/1024) = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "10259", "content": "学校 图书馆 新 买 故事书 650 本 ， 科技 书 200 本 ， 连环画 150 本 ， 科技 书 占 总数 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2902", "content": "实际 完成 计划 的 120% ， 实际 比 计划 多 完成 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10277", "content": "10 吨 的 (3/25) 比 (2/3) 吨 多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19663", "content": "如果 某种 奶粉 含 脂肪 25% ， 那么 450 克 奶粉 中 含 脂肪 = 多少 克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2508", "content": "50 减去 它 的 50% ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4074", "content": "从 640 里面 连续 减去 8 ， 最 多 能 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7413", "content": "小 敏 的 体重 是 30 千克 ， 是 哥哥 体重 的 (3/4) ， 哥哥 的 体重 是 爸爸 体重 的 (4/5) ， 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22975", "content": "大桥 乡 今年 粮食 比 去年 增产 25% ， 今年 收 粮食 80 万吨 ， 比 去年 增产 多少 万吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21363", "content": "小 明 乘 索道 缆车 上山 途中 发现 从 对面 过来 的 缆车 有 100 个 ， 那么 在 这 条 索道 上 共有 缆车 多少 个 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16435", "content": "运 一批 蔬菜 ， 原 计划 每 车运 1200 千克 ， 7 车 可以 运 完 ， 实际 每 车运 1680 千克 ， 实际 多少 车运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1163", "content": "一 批 布料 ， 第一天 用 去 总数 的 (3/10) ， 第 二 天 比 第一天 多用 去 64 米 ， 这时 用 去 的 布料 和 剩下 的 比 是 7 ： 2 ． 这 批 布料 共有 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20313", "content": "王 叔叔 原来 的 工资 是 1500 元 ， 现在 每月 工资 涨 了 300 元 ． 王 叔叔 的 工资 涨 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13004", "content": "0.07 扩大 100 倍 之后 减去 0.7 ， 差 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "272", "content": "马路 的 一边 原来 每隔 14 米 装 一支 木 电杆 ， 共 装 了 56 支 ， 现在 换成 水泥 电杆 ， 每隔 35 米 装 一根 即可 ， 只 装 多少 根 就 行 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1930", "content": "小 华 把 过年 的 压岁钱 500 元 2000 年 2 月 10 日 存入 银行 ， 一年期 的 年利率 是 5.67% ， 到期 时 可 获 本息 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5588", "content": "除数 是 6 ， 商 是 70 ， 余数 3 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "874", "content": "一 条 路 ， 第一周 修 了 40% ， 第 二 周 修 了 252 米 ， 两周 共 修 了 这 条 路 的 85% ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3139", "content": "甲 数 的 (1/5) 是 10 ， 则 它 的 25% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1521", "content": "两个 书法 小组 一共 交 了 175 幅 作品 ， 第一组 15 人 ， 第 二 组 20 人 ． 平均 每人 完成 几幅 作品 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12621", "content": "六年级 一班 有 48 名 同学 ， 其中 (1/4) 的 人 参加 篮球比赛 ， (1/3) 的 人 参加 排球比赛 ， 剩下 的 参加 棋类 活动 ． 参加 棋类 活动 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4028", "content": "司机 王 叔叔 从 厦门 出发 到 福州 送货 ， 前 3 小时 的 速度 是 60 千米 / 小时 ， 后 2 小时 的 速度 是 50 千米 / 小时 ， 王 叔叔 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "326", "content": "已知 两个 因数 的 积 是 7.5 ， 其中 一个 因数 是 0.15 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5057", "content": "一 个 面粉厂 ， 用 200 千克 小麦 磨 出 170 千克 面粉 ． 磨 出 的 面粉 占 小麦 总数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3648", "content": "甲 容器 中 有 浓度 为 2% 的 盐水 180 克 ， 乙 容器 中 有 浓度 为 9% 的 盐水 若干 克 ， 从 乙 中 取出 240 克 盐水 倒入 甲 ， 此时 ， 甲 、 乙 两个 容器 内 的 食盐 量 相等 ． 乙 容器 中原 有 盐水 多少 克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2597", "content": "一 个数 除以 5 ， 商 是 37 ， 余数 是 4 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6941", "content": "小胖 和 小 亚 一起 打 一份 1024 个 字 的 文稿 ， 小胖 每分钟 打 56 个 字 ， 小 亚 每分钟 打 48 个 字 ， 小 亚 先 打 了 5 分钟 ， 剩下 的 由 小胖 来 完成 ， 小胖 还 需要 几分钟 才能 打 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5991", "content": "学校 图书馆 有 连环画 114 本 ， 故事书 的 本 数 比 连环画 的 12 倍 多 87 本 ， 故事书 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2560", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相对 开出 ， 当 甲 车行 了 全程 的 (5/7) 时 ， 乙 车行 了 72 千米 ； 当 甲 车 到达 b 地 时 ， 乙 车行 了 全程 的 (7/10) ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20950", "content": "张 兰 从 家 到 学校 要 用 27 分钟 ， 她 每分钟 走 67 米 ， 她家 到 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10314", "content": "一 捆 电线 长 (1/2) 米 ， 第一次 用 去 全长 的 20% ， 第 二 次 用 去 (1/4) 米 ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6129", "content": "永明 小学 1 - 6 年级 的 数学教师 的 年龄 分别 是 27 、 35 、 40 、 37 、 45 、 32 岁 ， 那么 他们 的 平均年龄 = 多少岁 ？", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2961", "content": "某 筑路 队 5 天 挖土 150 方 ， 现有 750 方 土 ， 需 多少 天 挖 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11244", "content": "小强 要 制作 一个 棱 长 为 5 分 米 的 正方体 无盖 的 鱼缸 ， 至少 需要 多少 平方分米 的 玻璃 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3050", "content": "一 个 平行四边形 的 底 和 高 都 扩大 5 倍 ， 它 的 面积 扩大 多少倍 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "506", "content": "小 明 从 家 去 学校 ， 已经 行 了 (3/5) 千米 ， 已经 行 的 路程 比 剩下 的 少 (1/4) 千米 ， 小 明 从 家 到 学校 共有 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9914", "content": "红星 小学 五年级 有 男生 98 人 、 女生 112 人 、 四年级 学生 人数 比 五年级 少 (2/7) ， 四年级 有 多少 名 学生 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6531", "content": "在 集邮 活动 中 ， 李 丹 收集 了 110 张 ， 李 玉 比 李 丹 少 收集 20% ． 李 玉 收集 邮票 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15390", "content": "一 件 西服 原价 2400 元 ， 现在 打 0.85 出售 ． 比 原来 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18469", "content": "16 与 24 的 和 除以 8 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13847", "content": "布袋 里 有 30 枝 铅笔 ， 其中 红色 铅笔 20 枝 ， 绿色 铅笔 7 枝 ， 黄色 铅笔 3 枝 ． 任意 摸 一枝 ， 摸 出 红色 铅笔 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4451", "content": "三年级 4 个 班 去 春游 ， 每班 45 人 ， 学校 准备 了 5 辆 汽车 ， 平均 每辆车 要 坐 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4563", "content": "一 只 蜗牛 要 爬 一口 9 米 深 的 枯井 ， 它 白天 向 上爬 3 米 ， 晚上 下滑 2 米 ， 第 多少 天 蜗牛 能 爬 到 井口 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8135", "content": "5 （ 1 ） 班 有 42 名 同学 ， 会 下象棋 的 有 21 名 同学 ， 会 下围棋 的 有 17 名 同学 ， 两种 棋 都 不会 下 的 有 10 名 同学 ． 两种 棋 都 会 下 的 有 多少 名 同学 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10173", "content": "8 只 熊猫 5 天 吃 120 千克 玉米 ， 平均 每 只 熊猫 每天 吃 玉米 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18142", "content": "一 袋 大米 ， 用 去 了 它 的 (3/4) ， 剩下 的 比 用 去 的 少 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15677", "content": "小 明 过年 把 500 元 压岁钱 存入 银行 ， 定期 1 年 ， 年利率 是 2.5% ， 到期 小 明 一共 可 得 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15362", "content": "仓库 有 雨伞 36 把 ， 雨衣 比 雨伞 多 (1/9) ， 雨衣 有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13667", "content": "多少 / 6 = 7 … 3 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "298", "content": "一 辆车 平均 每 小时 行驶 x 千米 ， 6 小时 行驶 了 360 千米 ． 求 速度 = 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2643", "content": "沪宁 高速公路 全长 274 千米 ， 一辆 汽车 从 南京 开往 上海 ， 行驶 3 小时 后 离 上海 还有 34 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13781", "content": "我国 北方 某地 冬季 最高 气温 2 ℃ ， 而 南极 长城站 同期 的 最高 气温 比 北方 该地 最高 气温 的 5 倍 还 多 1.7 ℃ ， 南极 长城站 的 最高 气温 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19132", "content": "服装厂 原来 做一套 童装 用布 2.4 米 ， 改进 剪裁 方法 后 ， 每套 节省 用布 0.2 米 ， 原来 做 264 套 童装 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15766", "content": "利民 果园 有 梨树 180 棵 ， 其中 苹果树 的 棵 数 比 梨树 多 (1/4) ． 果园 里 有 苹果树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8714", "content": "小 明 家 到 学校 的 路程 有 4 千米 ， 他 已经 走 了 3 千米 ， 还 剩下 几分 之 几 没 走 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19857", "content": "有 一张 硬纸板 ， 王老师 做 数字 卡片 用 了 这 张 纸 的 (2/7) ， 做 试题 卡片 用 了 这 张 纸 的 (4/7) ． 还 剩下 这 张 纸板 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23020", "content": "18 的 (5/9) + (2/5) / (7/15) 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11497", "content": "动物园 里 有 大象 9 头 ， 金丝猴 4 只 ． 金丝猴 的 数量 是 大象 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9485", "content": "图书室 里 连环画 册 的 本 数 是 科技 书 的 (3/4) ， 故事书 的 本 数 是 科技 书 的 (1/3) ． 已知 连环画 册 有 90 本 ， 求 故事书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18935", "content": "清 达 家电 商场 “ 5 • 一 ” 期间 开展 大 酬宾 活动 ， 全场 家电 按 80% 销售 ， 原价 150 元 的 电饭锅 ， 现在 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12068", "content": "李老师 买 了 2 盒 羽毛球 ， 每盒 有 6 个 ， 一共 花 去 48 元 ． 平均 每个 羽毛球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10981", "content": "张 华 做 乘法 时 把 一个 因数 65 写成 了 85 ， 得到 的 积 是 7990 ， 正确 的 结果 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15799", "content": "6 是 一个 数 的 (2/9) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7876", "content": "一 个 修路 队 修 一条 公路 ． 原 计划 每天 修 200 米 ， 15 天 完成 任务 ． 实际 每天 修 250 米 ， 这样 可以 比 原 计划 提前 几天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9790", "content": "妈妈 今年 36 岁 ， 女儿 今年 9 岁 ， 当 女儿 年龄 是 妈妈 年龄 的 (2/5) 时 ， 女儿 多少岁 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6555", "content": "张 华 读 一 本书 ， 前 6 天 每天 读 25 页 ， 以后 每天 多 读 5 页 ， 又 经过 4 天 后 ， 正好 读完 ， 张 华 平均 每天 读 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1059", "content": "体育 用品商店 0.8 处理 一种 篮球 ， 现价 是 120 元 ． 篮球 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4903", "content": "谷子 的 出米率 大约 是 70% ， 要 出 米 840 千克 ， 需要 多少 千克 的 谷子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9214", "content": "△ / 8 = □ … ○ ， ○ 最大 填 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2214", "content": "小 华 今年 9 月 1 日 把 积攒 的 500 元 压岁钱 存入 银行 ， 定期 3 年 ， 年利率 3.69% ， 准备 到期 时 把 钱 全部 取出 捐给 希望工程 ， 到 时 她 可 捐款 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19404", "content": "火车 每 小时 行 180 千米 ， 相当于 一种 飞机 飞行速度 的 (1/45) ， 这种 飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9688", "content": "一 个数 的 (5/8) 是 40 ， 这个 数 的 (1/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "151", "content": "甲 、 乙 、 丙 、 丁 、 戊 5 人 拿出 同样 多 的 钱 ， 合伙 订购 同样 规格 的 若干 件 货物 ， 货物 买来 后 ， 甲 、 乙 、 丙 、 丁 分别 比 戊 多 拿 了 7 、 8 、 10 、 15 件 货物 ， 最后 结算 时 ， 丙 付给 戊 24 元 ， 那么 丁 应付 给 戊 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14048", "content": "今年 在 我国 某 一个 湖区 越冬 的 白天鹅 有 171 只 ， 是 白鹤 的 9 倍 ， 白鹤 有 几只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20451", "content": "果园 里 有 苹果树 560 棵 ， 梨树 比 苹果树 多 (3/8) ， 两种 树 共有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20734", "content": "甲 数 扩大 10 倍 等于 乙 数 ， 甲 、 乙 的 和 是 22 ， 则 甲 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19946", "content": "商场 里 的 布娃娃 ， 如果 有 优惠卡 可以 打 0.8 ， 小 平 用 优惠卡 买 一个 布娃娃 节约 了 9.6 元 ． 这个 布娃娃 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11903", "content": "菜场 里 有 茄子 6 筐 ， 每 筐 重 25 千克 ； 还有 西红柿 5 筐 ， 每 筐 重 20 千克 ． 菜场 里 茄子 和 西红柿 共有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19498", "content": "把 一颗 体积 为 120 立方厘米 的 玻璃 珠子 放入 底 面积 为 80 平方厘米 的 圆柱形 容器 中 ， 容器 中 有 足够 的 水 把 玻璃 珠子 淹没 ， 那么 容器 中 的 水位 上升 了 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15783", "content": "一 根 铁丝 ， 用 去 (4/5) 米 ， 正好 是 它 的 (1/6) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6428", "content": "一 根 长 4 米 的 圆木 锯 成 2 段 要 用 3 分钟 ， 锯 成 8 段 要 用 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4062", "content": "甲 仓 存粮 120 吨 ， 是 乙 仓 存粮 的 (2/3) ， 甲 、 乙 两 仓 一共 存粮 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9632", "content": "某 电脑公司 计划 用 9 天 时间 组装 电脑 630 台 ， 实际 只用 6 天 就 完成 了 任务 ， 实际 每天 比 计划 多 组装 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18651", "content": "马路 一边 共 栽 了 48 棵 柳树 ， 每 两棵 柳树 之间 栽 一棵 杨树 ， 共有 多少 棵 杨树 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20330", "content": "小 杨 在 计算 一道 小数 加法 题 时 ， 把 6.2 错 看作 62 来 算了 ， 得数 为 66.5 ， 那么 正确 的 答案 应该 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2132", "content": "王 飞 出生 时 重 3.65 千克 ， 3 个 月 以后 他 的 体重 是 8 千克 ， 他 平均 每个 月 长 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14796", "content": "一 个 学校 修建 阳光 操场 用 1.5 万元 ， 比 计划 节省 0.5 万元 ， 节省 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1593", "content": "一 台 拖拉机 上午 耕地 3.95 公顷 ， 下午 比 上午 多 耕 0.8 公顷 ． 这 台 拖拉机 全天 一共 耕地 多少 公顷 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7731", "content": "若 10 元 钱 可以 买 12 个 苹果 ， 晓 红 买 了 27 个 这样 的 苹果 ， 她 共 花 了 多少 元 钱 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16996", "content": "游乐场 的 门票 原来 每张 40 元 ， “ 6 一 ” 期间 0.8 优惠 ， 购买 一张 门票 省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20980", "content": "停车场 上 有 大 汽车 26 辆 ， 小汽车 的 数量 是 大 汽车 的 3 倍 ． 停车场 上 大 汽车 和 小汽车 一共 有 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16343", "content": "一 列 火车 从 北京 开往 上海 ． 当 行 了 全程 的 (2/5) 时 ， 离 北京 420 千米 ． 北京 到 上海 的 距离 = 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18988", "content": "某 电冰箱 厂 去年 计划 生产 电冰箱 4000 台 ， 实际 生产 了 4500 台 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19778", "content": "小 明 有 4.2 元 钱 ， 给 小 虎 0.5 元 后 ， 还 比 小 虎 多 3 元 ， 则 小 虎 原有 多少 元 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2974", "content": "苹果 有 60 筐 ， 比 梨 的 (3/4) 多 12 筐 ， 梨 有 多少 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4684", "content": "皮鞋厂 去年 生产 皮鞋 27500 双 ， 比 原 计划 增产 10% ， 去年 原 计划 生产 皮鞋 多少 双 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3116", "content": "小 辉 看 一本 133 页 的 杂志 ， 第一天 看 了 27 页 ， 第 二 天 看 了 33 页 ， 还 剩 多少 页 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7016", "content": "96 连续 减去 6 ， 减 多少 次 正好 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18578", "content": "某 商品 原价 200 元 ， 现在 打 0.88 出售 ， 现在 价格 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13106", "content": "长方体 蓄水池 中 有 水 2100 立方米 ， 这个 蓄水池 长 50 米 ， 宽 20 米 ， 水深 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11207", "content": "把 一根 5 米 长 的 绳子 平均 分成 3 段 ， 每 段 绳子 的 长 是 全长 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8454", "content": "一 把 椅子 68 元 ， 一张 桌子 147 元 ， 学校 准备 购买 9 套 课桌椅 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17912", "content": "一 批 货物 共 800 吨 ， 运走 350 吨 ， 运走 的 占 这 批 货物 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21214", "content": "一 个 木工 把 一根 长 24 米 的 木条 锯 成 3 米 长 的 小 段 ， 每 锯断 一次 要 用 5 分钟 ， 锯 完 共 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5863", "content": "1.3 与 (4/5) 的 和 除以 3 与 (2/3) 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8071", "content": "赵老师 的 月工资 为 4000 元 ， 按规定 超出 3500 元 的 部分 按 3% 的 税率 缴纳 个人所得税 ． 赵老师 税后 工资 为 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18223", "content": "李师傅 加工 一批 零件 ， 上 半月 完成 计划 的 (5/8) ， 下半月 完成 计划 的 (3/5) ． 这个 月 李师傅 超额完成 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8873", "content": "一 批 米 ， 已 吃 了 整批 米 的 (7/10) ， 已 吃 的 比 没 吃 的 多 160 千克 ． 这 批 米 有 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18558", "content": "一 筒 羽毛球 有 12 只 ， 李老师 买来 14 简 ， 李老师 共 买 了 多少 只 羽毛球 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18916", "content": "一 批 木料 ， 先 用 去 总数 的 (1/5) ， 又 用 去 总数 的 (4/9) ， 这时 用 去 的 比 剩下 的 多 13 方 ， 这 批 木料 共有 多少 方 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13038", "content": "图书馆 购回 一批 新书 ， 每层 摆 60 本书 ， 每个 书架 有 4 层 ， 共 摆满 了 15 个 这样 的 书架 ． 图书馆 共 购回 了 多少 本 新书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5071", "content": "超市 运 来 矿泉水 和 果汁 各 5 箱 ， 矿泉水 每箱 24 瓶 ， 果汁 每箱 36 瓶 ， 果汁 比 矿泉水 多 多少 瓶 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15586", "content": "化肥厂 1 、 2 月份 共 生产 化肥 520 吨 ， 3 月份 生产 310 吨 ， 4 月份 生产 354 吨 ， 平均 每月 生产 化肥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17673", "content": "某 电影院 每 排座位 可以 坐 38 人 ， 5 排座位 可以 坐 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2811", "content": "甲 、 乙 两 人 同时 从 相距 2000 米 的 两地 相向 而 行 ， 甲 每分钟 行 55 米 ， 乙 每分钟 行 45 米 ， 如果 一只 狗 与 甲 同时 同 向 而 行 ， 每分钟 行 120 米 ， 遇到 乙 后 ， 立即 回头 向 甲 跑 去 ， 遇到 甲 再 向 乙 跑 去 ． 这样 不断 来回 ， 直到 甲 和 乙 相遇 为止 ， 狗 共 行 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20033", "content": "加油站 有 850 升 汽油 ， 准备 每 罐装 25 升 ， 一共 需要 多少 罐 才能 装完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2322", "content": "在 400 米 长 的 环形 跑道 上 ， 甲 、 乙 两 人 同时 同 地 同 向 出发 跑步 ， 若 甲 每分钟 跑 320 米 ， 乙 每分钟 跑 300 米 ， 多长时间 两 人 第一次 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "61", "content": "小 明 每天 早上 跑步 13 分钟 ， 他 的 速度 大约 是 180 米 / 分 ， 他 每天 大约 跑步 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2783", "content": "一 种 小商品 的 现价 是 4.8 元 ， 比 原价 降低 了 20% ， 这种 小商品 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5296", "content": "李宁 家 有 花椒树 80 棵 ， 平均 每棵 可以 产 花椒 12 千克 ， 今年 每千克 花椒 可以 卖 9 元 ， 可以 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14353", "content": "一 个数 的 (2/3) 的 (1/2) 是 20 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19990", "content": "张师傅 以 1 元 4 个 苹果 的 价格 买进 苹果 若干个 ， 又 以 2 元 5 个 苹果 的 价格 把 这些 苹果 卖出 ， 如果 他 要 赚 得 15 元 的 利润 ， 那么 他 必须 卖出 苹果 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "411", "content": "3 台 磨粉机 4 小时 磨 面粉 10.2 吨 ， 平均 一台 磨粉机 一 小时 能 磨 面粉 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12762", "content": "半个 月 前 饭堂 购入 63 吨 大米 ， 已经 用 了 15 天 ， 平均 每天 用 1.4 吨 ， 余下 的 米 ， 如果 每天 用 1.2 吨 ， 还 可以 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6247", "content": "初3 年级 参加 数 、 理 、 化 小组 的 人数 比 是 6 ： 5 ： 4 ． 3 个 组 共有 135 人 ， 问 参加 物理 小组 有 多少 人 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19767", "content": "4 辆 汽车 3 次 运 水泥 960 袋 ， 平均 每辆 汽车 每次 运 水泥 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20543", "content": "爸爸 重 75 千克 ， 小 明 重 30 千克 ， 两 人 一共 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6007", "content": "300 千克 的 面粉 吃 了 30% 后 ， 又 吃 了 余下 的 70% ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "21129", "content": "在 除法 算式 642 / 6 中 ， 如果 要 使 商 增加 5 ， 被除数 应该 增加 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4486", "content": "一 节 课 的 时间 是 (2/3) 小时 ， 有 一节 科学课 老师 讲解 用 了 (1/5) 小时 ， 小组讨论 用 了 (3/10) 小时 ， 其余 时间 学生 做 实验 ， 学生 做 实验 用 了 多长时间 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22462", "content": "有 一群 兔子 ， 其中 白兔 60 只 ， 比 黑 兔 多 20% ， 黑 兔 有 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20145", "content": "刘 叔叔 从 a 地 到 b 地 平均 每 小时 行驶 58.5 千米 ， 2 小时 到达 ， 返回 时 用 2.5 小时 ， 求 返回 时 的 速度 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4726", "content": "吝啬鬼 总 喜欢 把 一条 面包 分成 很多 段 吃 ， 把 一条 面包 分成 5 段 用 20 秒 ， 那么 分成 4 段 要 用 多少 秒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2472", "content": "王老师 2008 年 2 月 26 日 把 4500 元 钱 存入 银行 ， 整存整取 一年 ， 年利率 是 2.25% ． 准备 到期 后 把 利息 捐赠 给 “ 希望工程 ” ． 到期 时 王老师 可以 捐赠 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15676", "content": "商丘市 一中 去年 入学考试 ， 有 (1/5) 的 学生 被 录取 ， 被 录取 考生 的 平均 成绩 是 135 分 ， 没有 被 录取 的 考生 的 平均 成绩 是 105 分 ． 考生 的 平均 成绩 = 多少 分 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15158", "content": "一 辆 旅游车 在 平原 和 山区 各行 了 3 小时 ， 在 平原 每 小时 行 50 千米 ， 在 山区 每 小时 行 30 千米 ， 这 段 路程 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "303", "content": "除数 是 9 ， 商 是 3 ， 被除数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9472", "content": "一 些 画片 ， 分别 分给 甲 乙丙 3 个 孩子 ， 甲 拿走 了 (1/3) 多 6 张 ， 乙 拿走 了 (2/5) 少 4 经 张 ， 丙 拿走 了 18 张 ， 这些 画片 一共 有 多少 张 ？ ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15093", "content": "把 一根 木头 锯 成 4 段 需要 6 分钟 ， 如果 要 锯 成 13 段 ， 需要 多少 分 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19002", "content": "一 辆 自行车 轮胎 外 直径 是 0.7 米 ， 王老师 骑车 从 学校 到 少年宫 ． 如果 车轮 每分钟 转 100 转 ， 5 分钟 可 到达 少年宫 ． 从 学校 到 少年宫 的 路程 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "19184", "content": "学校 安排 25 个 小组 去 植树 ， 每组 中 有 4 人 植树 、 2 人 浇水 ． 一共 有 多少 人 参加 这次 植树 活动 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6627", "content": "一 个 自动售货机 里 有 足够 多 的 10 种颜色 的 球 ， 小 明 想 买 一对 同 颜色 的 球 ， 如果 球 的 单价 是 2 元 ， 那么 ， 为了 确保 小 明 实现 愿望 ， 他 至少 要花费 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17484", "content": "池塘 里 ， 一根 竹竿 插入 泥 中 的 部分 为 (3/5) 米 ， 比 露出 水面 的 部分 少 (1/2) 米 ， 浸没 在 水中 部分 为 1 米 ． 这根 竹竿 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11075", "content": "根据 “ 松树 有 36 棵 ， 柳树 有 85 棵 ” ， 可以 求 出 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13056", "content": "某 粮店 有 一批 大米 ， 计划 每天 销售 0.5 吨 ， 24 天 售完 ． 实际 20 天 就 售完 了 ， 实际 每天 多 销售 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1858", "content": "杨 阿姨 打 一份 1000 个 字 的 文件 ， 已经 打 了 一些 ， 还 剩 270 个 字 没 打 ． 杨 阿姨 已经 打 了 多少 个 字 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19569", "content": "袁 家 湾 小学 每个 班 有 学生 48 名 ， 14 个 班 有 多少 名 学生 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8882", "content": "水果店 卖出 15 箱 水果 ， 共 收到 钱 300 元 ， 照 这样 计算 ， 若 卖出 25 箱 ， 共 收到 钱 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18538", "content": "在 一条 走廊 一边 ， 每 放 8 盆 月季花 的 距离 是 42 分 米 ， 照 这样 计算 ， 放 20 盆 月季花 的 距离 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8368", "content": "摩托车 和 自行车 在 相距 222 km 的 甲乙 两地 同时 出发 ， 自行车 在 前 ， 摩托车 在 后 ， 自行车 每 小时 行 18 km ， 摩托车 每 小时 行 48 km ． 途中 摩托车 发生 故障 修理 1 小时 后 继续前进 ． 摩托车 追 上 自行车 时 行 了 多少 km ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9179", "content": "王奶奶 买 的 苹果 比 桔子 多 (4/5) 千克 ， 桔子 比 苹果 少 (2/3) ， 王奶奶 买 了 多少 千克 苹果 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17441", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一天 行 了 全程 的 (1/4) ， 第 二 天 行 了 全程 的 (1/5) ， 离 乙地 还有 112 千米 ． 甲 、 乙 两地 相距 多 远 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7106", "content": "一 种 手机 原价 2000 元 ， 连续 两次 0.8 后 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20242", "content": "一 个数 减去 (3/8) 等于 (1/2) - (1/4) 的 差 ， 求 这个 数 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15058", "content": "师徒俩 加工 同 一种 零件 ， 徒弟 每 小时 加工 12 个 ， 工作 了 3 小时 后 ， 师傅 开始 工作 ， 6 小时 后 ， 两 人 加工 的 零件 同样 多 ， 师傅 每 小时 加工 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17339", "content": "在 一次 竞赛 中 ， 某班 的 及格率 为 50% ， 如 要 把 4 名 同学 的 成绩 由 59.5 分 提高 到 60 分 ， 及格率 为 60% ， 该班 共有 多少 名 学生 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15258", "content": "一 筐 桔子 ， 连 筐 重 50 千克 ， 买 出 了 40% 后 ， 连 筐 还 重 36 千克 ． 这 筐 桔子 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6147", "content": "生产 一批 草帽 ， 第一天 完成 总数 的 (1/3) ， 如果 再 加工 250 顶 ， 则 还 剩 这 批 任务 的 25% ， 这 批 草帽 一共 有 多少 顶 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10937", "content": "玩具厂 要 生产 一批 绒毛玩具 ， 原 计划 每天 生产 3000 个 ， 24 天 可以 完成 任务 ， 实际 每天 生产 4500 个 ， 实际 比 计划 提前 几天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9150", "content": "王老师 想 贷款 （ 既 向 银行 借贷 ） 购买 一套 价值 21 万元 的 住房 ． 银行 规定 住房 贷款额 最高 为 住房 总额 的 70% ， 王老师 最 多 能 贷款 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18022", "content": "小巧 体重 29 千克 ， 比 小胖 轻 9 千克 ， 小胖 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10117", "content": "王 庄 前年 植树 50150 棵 ， 去年 比 前年 多 植树 20% ， 今年 计划 比 去年 增加 10% ， 今年 应 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15749", "content": "制造 一种 机床 ， 原来 每 台 用 钢材 2 吨 ， 现在 每 台 用 钢材 比 原来 节约 (1/5) ， 现在 每 台 用 钢材 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14344", "content": "笑笑 看 一 本书 ， 已 看 的 页数 是 未 看 的 60% ， 已 看 了 84 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16243", "content": "笼 册 小学 六年级 有 学生 112 人 ， 它 的 (3/4) 正好 是 全校学生 人数 的 (1/11) ， 这 所 学校 共有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7738", "content": "李 娇 一分钟 做 仰卧起坐 30 个 ， 正好 是 张 强 的 (3/5) ． 张 强 一分钟 做 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16591", "content": "一 辆 汽车 从 甲地 到 乙地 ， 每 小时 进行 60 千米 ， 5 小时 到达 ． 如果 提前 1 小时 到达 ， 这辆 汽车 每 小时 需要 多行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15264", "content": "果园 里 有 苹果树 、 梨树 一共 800 棵 ， 其中 苹果树 占 60% ， 后来 又 栽 了 一些 苹果树 ， 这样 苹果树 占 总数 的 68% ， 后来 又 栽 了 多少 棵 苹果树 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22478", "content": "王老师 带 着 18 名 同学 参加 夏令营 ， 有 一条 近路 可以 很快 到达 住宿 的 地方 ， 但 必须 过 一条 河 ． 河边 的 小船 一次 可以 载 4 人 ， 而 只有 王老师 一个 人 会 划船 ． 至少 几次 ， 老师 和 同学 们 可以 全部 过河 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "642", "content": "一 个 养鸡 专业户 养 了 一些 鸡 ， 卖出 20% 后 还 剩 1280 只 ． 这个 养鸡 专业户 原来 有 鸡 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10489", "content": "电影票 一张 15 元 ， 降价 后 观众 增加 一 倍 ， 收入 增加 (1/5) ， 问 一张 电影票 降价 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9413", "content": "小 丽 的 妈妈 在 银行 里 存入 人民币 5000 元 ， 存期 一年 ， 年利率 2.25% ， 取款 时 由 银行 代扣 代收 20% 的 利息税 ， 到期 时 ， 所 交 的 利息税 为 多少 元 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "13834", "content": "从 3 幅 国画 、 2 幅 油画 中 选取 两幅 不同 类型 的 画 布置 教室 ， 问 有 几种 不同 的 选 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5200", "content": "公园 门票 每张 售价 25 元 ， 节假日 优惠 ， 买 4 张 送 1 张 ． 5 个人 节日 去 游 公园 ， 平均 每人 要 花 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9950", "content": "甲乙 两地 相距 120 千米 ， 赵 强 骑 自行车 从 甲地 到 乙地 ， 行 了 全程 的 60% ． 这时 离 乙地 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21558", "content": "我们 学校 参加 兴趣小组 活动 的 共有 103 人 ， 其中 小提琴 组 有 15 人 ， 美术组 的 人数 是 小提琴 组 的 2.4 倍 ， 其余 的 是 体育组 ， 体育组 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "299", "content": "据统计 ， 我国 有 桦树 22 种 ， 占 全世界 桦树 种类 的 (11/20) ， 求 世界 有 多少 种 桦树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11309", "content": "一 包 饼干 重 450 克 ， 这样 的 6 包 饼干 重 多少 克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "91", "content": "一 种 吸尘器 打 0.9 后 售价 585 元 ， 这种 吸尘器 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4099", "content": "第一天 看 了 这 本书 的 (3/8) ， 第 二 天 又 看 了 这 本书 的 (4/8) ， 两天 一共 看 了 这 本书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13723", "content": "某 工厂 有 男 职工 32 人 ， 女职工 的 人数 是 男 职工 的 18 倍 ， 这个 工厂 有 职工 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19418", "content": "小 冬 给 小 阳 2 颗 糖 后 ， 还 比 小 阳 多 3 颗 ． 小 冬 原来 比 小 阳 多 多少 颗 糖 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14390", "content": "弟弟 看 一本 故事书 ， 已经 看 了 36 页 ， 比 没 看 的 多 27 页 ， 一共 有 多少 页 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16579", "content": "修 一条 公路 ， 计划 投资 15 万元 ， 实际 只用 了 12 万元 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8624", "content": "在 一个 正方体 的 6 个 面上 分别 涂 上 颜色 ， 要 使 红色 朝 上 的 可能性 是 (1/3) ， 应该 有 多少 个 面 涂 上 红色 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7666", "content": "校园 里 有 258 棵 铁树 ， 175 棵 杨树 ， 榕树 的 棵 数 比 铁树 和 杨树 棵 数 的 总数 少 83 棵 ． 榕树 有 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2351", "content": "小 亚 有 150 元 钱 ． 买 书 用 掉 80 元 ， 买 笔 用 掉 12 元 ， 还 剩下 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15528", "content": "李师傅 生产 一批 零件 ， 已经 生产 了 16 天 ， 平均 每天 生产 45 个 ， 这样 还要 4 天 才能 完成 任务 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1371", "content": "三年级 有 39 个 同学 为 新生 做 小红花 ， 每人 做 了 5 朵 ， 如果 再 做 55 朵 ， 就 可以 送 每位 新生 1 朵 ． 今年 共 招 新生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11545", "content": "一 大 瓶 果汁 正好 能 倒 满 4 个 相同 的 杯子 ， 每个 杯子 的 容量 是 这 一大 瓶 果汁 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13816", "content": "某人 以 0.8 优惠价 购进 一套 衣服 节省 了 15 元 钱 ， 他 花 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17143", "content": "一 本 故事书 共 60 页 ， 王 华 前两天 看 的 页数 与 剩下 页数 的 比 是 1 ： 2 ， 看 了 两天 后 ， 剩下 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2398", "content": "把 两根 木棍 叠放 在 一起 ， 从头到尾 共 长 66 厘米 ， 其中 一根 木棍 长 48 厘米 ， 中间 重叠 部分 长 12 厘米 ， 另 一根 木棍 长 多少 厘米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21303", "content": "星月 饭店 平均 每天 要 用 掉 258 双 一次性 筷子 ． 这个 饭店 每个 月 大约 要 用 掉 多少 双 一次性 筷子 ？ （ 按 30 天 计算 ） ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17325", "content": "学校 今年 栽树 330 棵 ， 超过 原 计划 的 (1/5) ， 学校 原 计划 栽树 多少 棵 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13621", "content": "新 买来 840 本 图书 ， 每班 分 60 本 ， 可以 分给 几个 班 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11310", "content": "一 列 火车 上 原来 有 311 人 ， 到 1 号 站 时 下去 91 人 ， 上 了 70 人 ， 现在 火车 上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22543", "content": "买 一套 运动服 的 上衣 需要 58 元 ， 裤子 需要 65 元 ， 4 （ 1 ） 班 共有 学生 46 人 ， 每个 同学 买 一套 ， 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17374", "content": "一 个 电饭煲 的 原价 是 160 元 ， 现价 是 120 元 ， 电饭煲 的 原价 降低 了 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4480", "content": "上个月 用电量 比 这个 月 多 (1/9) ， 上个月 用电量 是 这个 月 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18254", "content": "育 红 小学 修建 一幢 教学楼 ， 计划 用 90 万元 ， 实际 节约 了 18 万元 ， 节约 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20054", "content": "小 明 跳绳 3 分钟 跳 了 120 下 ， 照 这样 计 跳 ， 5 分钟 跳 了 多少 下 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16516", "content": "修路 队 修 一条 路 ， 每天 修 全路 的 (1/10) ， 修 了 3 天 后 好 修 了 960 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21117", "content": "某市 出租车 的 起步价 为 14 元 ， 行驶 超过 3 千米 后 ， 每 千米 加收 2.10 元 ． 张 叔叔 要 乘 出租车 去 距 家 15 千米 的 某 公司 办事 ， 大约 需要 付 多少 钱 ？ （ 等候 时间 忽略不计 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18938", "content": "一 袋 红糖 的 (2/5) 是 80 克 ， 它 的 (1/4) = 多少 克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4917", "content": "食堂 王师傅 把 3 升 油 平均 装 在 6 个 油壶 里 ， 平均 每个 油壶 装 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20244", "content": "一 根 绳子 长 3 米 ， 用 去 了 (1/3) ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16805", "content": "粮库 用 3 辆 小 卡车 运 面粉 ， 每 车 装 30 袋 ， 每 袋 25 千克 ， 这个 粮库 共运 面粉 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2227", "content": "县政府 要 在 3 天 维修 一条 路 ， 第一天 修 了 全长 的 (1/3) ， 第 二 天 修 了 全长 的 (2/5) ， 第 3 天 修 了 160 米 ， 正好 修 完 ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20108", "content": "2013 年 全国 继续 推广 “ 家电 下乡 ” 政策 ， 为 使 农民 享受 更 多 实惠 ， 某种 型号 的 电冰箱 原价 3500 元 ， 现在 降价 15% ， 这 台 电冰箱 现价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15976", "content": "盒子 里 有 10 个 红色 木块 和 5 个 绿色 木块 ， 从中 摸 出 一个 木块 ， 摸 出 绿色 木块 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8517", "content": "公园 有 7 只 大 猴 ， 小 猴 的 只 数 比 大 猴 多 9 只 ， 公园 一共 养 了 多少 只 猴 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7692", "content": "希望 小学 四年级 原有 学生 520 人 ， 这 学期 转 走 38 人 ， 又 转 来 49 人 ． 现在 希望 小学 四年级 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21735", "content": "一 列 火车 从 台城 开往 海口市 行驶 了 12 小时 ， 每 小时 行驶 108 千米 ． 这 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13359", "content": "一 只 蜜蜂 1.5 时 飞行 24.6 千米 ， 是 一只 蝴蝶 飞行速度 的 2.5 倍 ． 这 只 蝴蝶 每 时 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11780", "content": "一 个 书架 ， 第一层 有 20 本书 ， 第 二 层 有 31 本书 ， 第 3 层 和 第一层 同样 多 ， 这个 书架 共有 多少 本书 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8792", "content": "小 云 、 小 会 和 小 飞 3 个 小朋友 一起 立定 跳远 比赛 ， 小 云 跳 了 1.76 米 ， 比 小 会 少 跳 0.15 米 ， 小 飞 比 小 会 少 跳 了 0.22 米 ． 小 飞 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16166", "content": "受 金融危机 的 影响 ， 某种 型号 的 钱 江 摩托 调整 了 售价 ， 降低 了 原来 的 20% 后 ， 现在 以 每辆 5400 元 的 新 售价 出售 ， 仍 获利 1200 元 ， 问 这种 型号 的 摩托车 在 降价 之前 的 利润 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10557", "content": "李老师 到 文化用品 批发部 买 奖品 ， 按 批发价 买 了 3 盒 钢笔 ， 每盒 10 枝 ， 一 共用 了 144 元 ， 这样 每枝 钢笔 比 零售价 便宜 多少 元 ？ （ 钢笔 零售价 ： 5.4 元 / 枝 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11041", "content": "节日 里 ， 要 在 120 米 长 的 城楼 上 插 彩旗 ， 每隔 5 米 插 一面 ． 两头 都 要 插 ， 一共 要 插 多少 面 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18544", "content": "小 红 看 一份 《 语文报 》 ， 上午 读 了 (1/3) ， 中午 又 读 了 余下 的 (3/5) ， 两次 共 读 了 全书 的 几分 之 几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7535", "content": "某 数 的 25% + 65 的 2 倍 ， 和 是 145 ． 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9400", "content": "学校 图书室 有 故事书 240 本 ， 占 图书 总数 的 (1/5) ， 科技 书 比 图书 总数 的 (1/3) 少 30 本 ． 科技 书 有 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17453", "content": "北京 奥运会 主会场 - - 国家 体育场 （ 鸟巢 ） 实际 投资 约 为 31 亿元 ， 比 原 计划 节约 了 (7/38) ， 原 计划 投资 多少 亿元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6260", "content": "在 创新 素质 实践 行 活动 中 ， 我校 学生 参加 社会 调查 ， 去年 有 900 名 参加 ， 相当于 今年 的 (9/10) ， 今年 有 多少 名 学生 参加 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4428", "content": "把 11 个 苹果 平均 分给 9 个 小朋友 ， 每个 小朋友 分 得 多少 个 苹果 ？ （ 结果 用 分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1409", "content": "李 明 从 学校 到 少年宫 ， 每 小时 走 4.5 千米 ， 0.6 小时 可以 到达 ． 如果 每 小时 只 走 3 千米 ， 要 多少 小时 才能 到达 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14476", "content": "在 学校 组织 的 数学 竞赛 中 ， 6 （ 1 ） 班 5 名 男生 的 总分 是 405 分 ， 7 名 女生 的 平均 成绩 是 87 分 ， 本次 竞赛 中 全班 的 平均 成绩 = 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20444", "content": "一 种 零件 的 标准 质量 是 25 克 ， 如果 质量 是 26 克 的 零件 记 作 + 1 ， 那么 23 克 的 零件 应该 记 作 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "94", "content": "某 电子厂 十 月份 的 上 半月 完成 了 计划 的 (2/5) ， 下半月 完成 了 计划 的 75% ， 结果 超额完成 了 30 台 ， 这个 月 实际 生产 了 多少 台 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "127", "content": "一 个 车间 9 月份 生产 零件 3600 个 ， 比 计划 多 生产 (1/8) ， 计划 生产 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14", "content": "（ 111 * 66 - 185 * 8 ） / 37 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20868", "content": "一 台 电冰箱 如果 打 0.8 出售 ， 售价 为 3200 元 ， 这种 电冰箱 原价 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5657", "content": "小 刚 骑 自行车 每分钟 行 280 米 ， 他 从 家 到 学校 共用 13 分钟 ， 小 刚 家 离 学校 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9539", "content": "有 85 千克 苹果 ， 占 水果 总数 的 (1/2) ， 共有 水果 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6238", "content": "修路 队 修 一条 长 1908 米 的 路 ， 修 了 的 长度 与 没 修 长度 的 比 是 1 ： 5 ， 修 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18966", "content": "学校 需要 购买 一些 电视机 ， 一台 电视机 3200 元 ， 李老师 带 的 钱 可以 买 6 台 电视机 ， 还 可以 余 600 元 ， 李老师 一共 带 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11726", "content": "希望 小学 五年级 有 学生 260 人 ， 体育 达标率 为 95% ， 体育 达标 人数 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11963", "content": "文文 每个 月 攒 8 元 钱 ， 攒 了 9 个 月 ， 他 买 了 一辆 滑板车 后 还 剩 7 元 ， 一辆 滑板车 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11064", "content": "把 一根 绳子 按 3 ： 2 截 成 甲 、 乙 两段 ， 已知 乙 段长 4.8 米 ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20438", "content": "一 种 面包车 降价 15% 后 ， 现在 的 售价 是 每辆 10.2 万元 ． 这种 面包车 原来 的 售价 是 每辆 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "550", "content": "学校 买 一批 皮球 ， 按 7 ： 3 ： 2 分给 了 一 二 三年级 班 ， 结果 二年级 比 一年级 少 分 36 只 ， 学校 共 买来 皮球 多少 只 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "15717", "content": "某校 体育 室 里 有 15 个 排球 ， 足球 的 个数 是 排球 的 4 倍 ， 足球 的 个数 比 排球 多 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "926", "content": "甲 、 乙 两车 从 相距 360 千米 的 两地 相对 开出 ， 甲 车 每 小时 行 45 千米 ， 乙 车 每 小时 行 55 千米 ， 两车 几小时 可以 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5551", "content": "有 一袋 大米 ， 用 去 40% 后 ， 减少 了 36 千克 ， 还 剩 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1737", "content": "果园 里 有 桃树 42 棵 ， 桃树 的 棵 数 是 苹果 数 的 (7/8) ， 苹果树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14112", "content": "老爷爷 每天 用 (1/6) 小时 跑 5 圈 ， 老爷爷 跑 一圈 平均 用 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18403", "content": "两列 火车 从 相距 798 千米 的 两地 同时 相对 开出 ， 经过 4.2 小时 两车 相遇 ， 甲 车 每 小时 行 86.7 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "794", "content": "星期 6 小 明 看 一本 课外书 ， 当 他 看 了 25 页 ， 正好 是 这 本书 的 (5/9) ， 这 本书 共有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17430", "content": "城东 小学 的 同学 们 做 早操 ， 21 个 同学 排成 一排 ， 每 相邻 的 两个 同学 之间 的 距离 相等 ， 第一个 人 到 最后 一个 人 的 距离 是 40 米 ， 相邻 两个 人 间距 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12151", "content": "24 的 (2/3) / 3 个 (2/51) 的 和 ． 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11984", "content": "某 工地 要 运 7860 千克 水泥 ， 运 了 9 次 后 ， 还 剩下 660 千克 没有 运 完 ． 平均 每次 运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15832", "content": "3 天 修 完 一条 路 ， 第一天 修 了 全长 的 20% ， 第 二 天 修 了 800 米 ， 第 3 天 修 的 比 前两天 的 总和 少 100 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1847", "content": "某 牛奶 制品厂 出售 一批 牛奶 ， 第一天 卖出 总数 的 (2/5) ， 第 二 天 卖出 总数 的 (3/5) ， 两天 的 销售量 相差 400 箱 ． 这 批 牛奶 共有 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12803", "content": "甲乙 两地 相距 740 米 ， 两列 火车 同时 从 两地 相对 开出 ， 经过 5 小时 相遇 ， 甲 车 每 小时 72 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19795", "content": "一 条 路 已修 了 15 千米 ， 是 剩下 的 2 倍 少 5 千米 ． 剩下 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1009", "content": "一 根 木头 锯 成 3 段 要 花 6 分钟 ， 锯 成 9 段 要 花 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21510", "content": "5 年 一班 种树 128 棵 ， 其中 32 棵 没 活 ， 成活 的 棵 数 占 总 棵 树 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14516", "content": "同学 们 参加 植树 活动 ， 其中 男生 有 72 人 ， 女生 人数 是 男生 的 62.5% ， 参加 植树 活动 的 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1442", "content": "一 个 平行四边形 的 面积 是 42 平方米 ， 它 的 高 是 6 米 ， 它 的 底 为 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19087", "content": "五年级 有 学生 120 人 ， 六年级 的 学生 人数 是 五年级 学生 人数 的 (5/6) ． 六年级 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23069", "content": "一 只 熊猫 和 一只 斑马 的 体重 之 和 是 750 千克 ， 已知 一只 斑马 的 体重 是 一只 熊猫 的 4 倍 ， 求 一只 熊猫 的 体重 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22322", "content": "甲乙 两 人 共同 生产 120 个 零件 ， (4/5) 小时 完成 任务 ． 甲 每 小时 生产 80 个 ， 乙 每 小时 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5858", "content": "两个 数 相乘 ， 如果 一个 因数 增加 4 ， 积 就 增加 64 ， 如果 另 一个 因数 减少 7 ， 积 就 减少 140 ． 原来 两个 数 的 积 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12660", "content": "甲 数 是 78 ， 是 乙 数 的 2 倍 ， 甲乙 两 数 的 和 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16571", "content": "幼儿园 买来 120 张 彩色 电光 纸 ， 比 买来 的 白纸 少 (2/5) ， 幼儿园 买来 白纸 多少 张 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8359", "content": "农技站 有 760 千克 柴油 ， 用 了 15 天 后 ， 还 剩下 160 千克 ． 平均 每天 用 柴油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13460", "content": "一 个 圆 的 周长 是 6.28 米 ， 这个 圆 的 直径 = ， 周长 与 直径 的 比值 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19813", "content": "春运期间 ， 火车 硬座 票价 上浮 15% ， 从 昆明 到 北京 的 火车 硬座 票价 是 320 元 ， 春运期间 的 票价 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1279", "content": "仓库 运 来 大米 240 吨 ， 是 运 来 的 大豆 吨数 的 (3/4) ， 运 来 大豆 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22665", "content": "甲 、 乙 两城 相距 163 千米 ， 一辆 汽车 从 甲 城 开往 乙 城 ， 速度 是 每 小时 50 千米 ， 行驶 了 3 个 小时 ， 此时 这辆 汽车 离 乙 城 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1236", "content": "用 一根 长 是 10 米 的 绳子 围着 一根 树 绕 4 圈 ， 还 余 3.72 米 ． 这 棵 树 的 直径 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22699", "content": "时代 超市 的 鲫鱼 每千克 4.52 元 ， 买 一条 1.2 千克 的 鲫鱼 需 付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22060", "content": "盒子 里 有 红 、 白 球 共 210 个 ， 若 每次 拿出 1 个 红球 和 3 个 白 球 ， 当 白 球 拿 完 时 ， 红球 还 剩 50 个 ， 那么 这 盒 有 红球 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12261", "content": "一 根 钢条 长 (5/8) 米 ， 用 去 一些 后 还 剩 (1/4) ， 用 去 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1376", "content": "在 一个 底面 长 为 20 cm ， 宽 15 cm 的 水箱 中 ， 水面 高度 为 10 cm ， 放入 一块 铁块 ， 水面 上升 到 17 cm ， 则 这块 铁块 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21460", "content": "为 治理 母亲河 ， 三年级 学生 捐款 408 元 ， 四年级 学生 捐款 的 钱 数 是 三年级 的 2 倍 ， 两个 年级 共 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4757", "content": "甲 数 的 (4/5) 和 乙 数 的 20% 相等 ， 乙 数 是 240 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14379", "content": "小 明 的 体重 52 千克 ， 体内 血液 有 4 千克 ． 血液 占 体重 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11323", "content": "小 明 带 了 40 元 钱 去 文具店 买 学习用品 ． 他 先 花 28.8 元 买 了 6 个 笔记本 ， 然后 准备 用 剩下 的 钱 买 一些 作业本 ， 每个 作业本 0.7 元 ， 小 明 还 可以 买 几个 作业本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19034", "content": "修 一条 公路 ， 第一次 修 了 25% ， 第 二 次 修 了 全程 的 15% ， 还有 120 千米 没 修 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19890", "content": "甲 、 乙 二 人 从 两地 相向 而 行 ， 相遇 时 乙 走 了 全程 的 (7/15) ． 相遇 后 ， 甲 继续 前行 ， 走 完全 程 用 了 45 分钟 ． 从 出发 到 相遇 乙 用 的 时间 = 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19037", "content": "把 7 个 红球 和 3 个 黄 球 装 在 同一个 口袋 中 任意 摸 出 1 个 球 ， 然后 再 放入 口袋 ． 照 这样 摸 20 次 ， 摸 出 红球 的 次数 大约 占 总 次数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4262", "content": "被减数 是 308 ， 减数 是 124 ， 差 大约 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "737", "content": "小 明 今年 10 岁 ， 妈妈 今年 38 岁 ， 当 小 明 15 岁 时 ， 妈妈 多少岁 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14070", "content": "2012 年 3 月 1 日 妈妈 将 20000 元 人民币 存入 银行 ， 定期 一年 ． 如果 按 年利率 3.5% 计算 ， 到期 后 ， 妈妈 可 取出 多少 元 ？ （ 免征 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9933", "content": "仓库 里 堆放 着 36 吨 货物 ， 运走 了 (7/9) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1804", "content": "一 个数 增加 它 的 50% 是 60 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18074", "content": "(5/6) - (3/8) 所得 的 差 与 (3/4) 相加 ， 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9599", "content": "一 种 微波炉 原价 是 800 元 ， 现在 以 0.9 出售 ， 现在 每 台 售价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18211", "content": "水果店 运 来 80 箱 水果 ， 每箱 25 千克 ， 比 原有 的 水果 多 150 千克 ， 原来 有 水果 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2438", "content": "盒子 里 有 6 个 红球 、 2 个 黄 球 和 一些 其它 颜色 的 球 ， 这些 球 除 颜色 外 完全相同 ． 如果 摸 出 一个 球 是 红球 的 可能性 为 (1/3) ， 盒子 里 其它 颜色 的 球 有 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14935", "content": "苗苗 把 4000 元 钱 存入 银行 ， 存期 3 年 ， 年利率 是 3.25% ． 到期 时 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10255", "content": "红星村 去年 栽树 35 棵 ， 今年 又 栽 了 20 棵 杨树 和 17 棵 柳树 ， 今年 栽 的 树 比 去年 栽 的 树 多 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8511", "content": "一 件 商品 ， 现价 是 180 元 ， 比 原价 便宜 了 20 元 ， 则 现价 比 原价 便宜 了 多少 % ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8437", "content": "超市 6 月份 营业额 3000 万元 ， 缴纳 了 150 万元 的 营业税 ． 超市 是 按 怎样 的 营业税 率 缴纳 营业税 的 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8429", "content": "某 小学 3 、 四年级 学生 收集 废纸 ， 三年级 45 人 ， 一共 收集 3375 克 ， 四年级 47 人 ， 一共 收集 4905 克 ． 两个 年级 平均 每人 收集 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15606", "content": "合唱队 有 男生 28 人 ， 比 女生 人数 的 (2/3) 少 2 人 ， 合唱队 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8574", "content": "小 敏 家 买来 一袋 面粉 ， 吃 了 20 千克 ， 正好 是 这 袋 面粉 的 (4/5) ． 这 袋 面粉 还 剩 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15657", "content": "一 个数 除以 3.2 后 再 加上 40 ， 和 是 120 ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2748", "content": "6 （ 1 ） 班 的 体育 达标率 是 85% ， 已知 该班 达标 的 人数 是 34 人 ， 则 未达标 的 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20658", "content": "一 个 养鸡场 今年 养鸡 15600 只 ， 去年 比 今年 少 养鸡 20% ， 养鸡场 今年 比 去年 多 养鸡 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17171", "content": "(2/5) - (1/4) - (1/10) = ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18452", "content": "压路机 的 滚筒 是 个 圆柱 ， 他 的 长 是 2 米 ， 横截面 的 半径 是 0.6 米 ， 如果 滚筒 每分钟 走动 10 周 ， 每分钟 能 压 路面 多少 米 ？", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "12201", "content": "一 种 书包 ， 如果 按 每个 84 元 出售 ， 则 可 赚 20% ． 每个 书包 的 成本 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "872", "content": "一 个 皮球 从 高处 自由 下落 ， 接触 地面 后 又 弹起 ， 每 一次 弹起 的 高度 是 上 一次 下落 高度 的 (2/5) ． 如果 皮球 第 3 次 弹起 的 高度 是 4 米 ， 那么 皮球 第一次 落下 时 的 高度 = 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17003", "content": "白兔 有 35 只 ， 黑 兔 的 只 数 比 白兔 少 (1/7) ， 黑 兔 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15271", "content": "一 台 碾米机 (2/3) 小时 碾米 6 吨 ， 相当于 这 批 大米 的 (4/5) ， 这 批 大米 共有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4248", "content": "学校 图书室 购买 了 一批 书 ， 运回 了 120 捆 ， 每 捆 50 本 ， 还有 2000 本 没有 运回 ， 这 批 书 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14336", "content": "100 千克 香蕉 ， 上午 卖 了 (3/5) ， 每千克 2.5 元 ， 剩下 的 下午 以 每千克 2.2 元 的 价格 卖出 ， 共 卖 了 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "12705", "content": "录音机 每 台 降价 30% 后 ， 售价 350 元 ， 这种 录音机 原来 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14776", "content": "服装厂 今年 计划 生产 20 万套 服装 ， 实际上 半年 完成 65% ． 照 这样 计算 ， 全年 可 超额完成 多少 万套 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16952", "content": "0.94 / 0.8 商 是 1.1 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20199", "content": "12 吨 的 (3/4) 与 多少 的 20% 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21003", "content": "一 件 衣服 原价 80 元 ， 现价 50 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11267", "content": "在 学校 举行 的 手工 比赛 中 ， 六年级 3 班 一共 制作 了 32 件 作品 ， 其中 女生 做 了 总数 的 (5/8) ， 女生 做 了 多少 件 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "167", "content": "一 列 火车 从 上海 开往 天津 ， 行 了 全程 的 (3/5) ， 距 天津 还有 538 千米 ． 这 列 火车 已经 行 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3951", "content": "小朋友 做 了 24 朵 红花 ， 比 黄花 的 朵 数多 (1/7) ， 则 黄花 做 了 多少 朵 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13819", "content": "百货商店 昨天上午 卖出 3 台 空调器 ， 下午 又 卖出 同样 的 空调器 5 台 ， 下午 比 上午 多 收入 货款 7200 元 ． 每 台 空调器 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9979", "content": "某班 开学 初 换 近视眼 的 有 10 人 ， 经过 治疗 ， 期末 检查 时 还有 8 人 换 近视眼 ， 比 开学 初 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1187", "content": "运 一批 货 ， 如果 每天 运走 6 吨 ， 要 20 天运 完 ； 如果 每天 多 运 2 吨 ， 需要 多少 天 可以 运 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11595", "content": "在 一道 乘法 算式 中 ， 积 是 一个 因数 的 25 倍 ， 是 另 一个 因数 的 16 倍 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5934", "content": "学校食堂 去年 用 去 煤 96 吨 ， 今年 用 去 的 比 去年 节约 20% ， 去年 用 煤 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8292", "content": "一 根 钢材 长 (4/5) 米 ， 如果 用 去 (1/2) 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22161", "content": "赵 阿姨 每分钟 打 108 个 字 ， 一篇 文稿 她 大约 用 15 分钟 上 打 完 ， 这 篇 文稿 有 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2110", "content": "甲 数 是 78 ， 乙 数 比 甲 数多 14% ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21864", "content": "四年级 同学 准备 制作 200 个 小 灯笼 庆祝国庆 ． 已经 做 了 88 个 ， 剩下 的 分给 28 个 同学 去 做 ， 平均 每人 要 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20063", "content": "一 个 比 的 比值 是 (1/3) ， 如果 前项 是 12 ， 则 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13703", "content": "做 一个 零件 需 钢材 (3/20) 米 ， 用 一段 长 1 米 的 钢材 做 5 个 这样 的 零件 ， 这 段 钢材 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21459", "content": "仓库 里 有 一批 货物 ， 运出 (3/5) 后 ， 有 运进 20 吨 ， 这时 仓库 里 的 货物 正好 是 原来 的 (1/2) ， 仓库 里 原来 有 货物 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12851", "content": "一 个数 的 5 倍 比 7 倍 少 12 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3759", "content": "筑路 队 修筑 一段 公路 ， 第一天 修 了 全部 的 (1/6) ， 第 二 天 修 了 全部 的 25% ， 还 剩 140 米 没有 修 ． 这 段 公路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6964", "content": "小区 里 栽 水杉 400 棵 ， 栽 的 梧桐 比 水杉 多 (1/4) ， 栽 了 梧桐 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9467", "content": "某 糖厂 7 月 生产 552 吨 糖 ， 比 计划 多 生产 72 吨 ， 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12160", "content": "商场 开展 店 庆 活动 ， 一台 冰箱 原价 为 3500 元 ， 打 0.8 后 ， 这 台 冰箱 现价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12789", "content": "甲 数 的 (4/5) 等于 乙 数 的 (1/5) ， 甲 数 是 乙 数 的 多少 （ 分数 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13568", "content": "甲 数 比 乙 数多 100 ， 乙 数 除 甲 数 的 商 是 3 ， 甲 、 乙 两 数 的 和 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11980", "content": "学校 艺术节 ， 准备 了 花环 和 彩球 各 20 个 ， 共 花 去 100 元 ， 彩球 每个 3.5 元 ， 花环 每个 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "128", "content": "1 吨 的 (4/7) 相当于 4 吨 的 多少 ． （ 判断 对错 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8416", "content": "光明 小学 有 60 人 参加 数学 竞赛 ， 获奖 人数 占 (2/5) ， 而 获奖 人数 中 的 (5/12) 是 男生 ， 获奖 男生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3192", "content": "甲 、 乙 两车 从 a 、 b 两地 同时 相向 而 行 ， 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 比 甲 车 多行 (1/5) ， 3 小时 后 两车 相遇 ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21880", "content": "果园 里 有 180 棵 桃树 ， 苹果树 比 桃树 多 (1/6) ， 又 比 梨树 少 (1/4) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16140", "content": "一 条 公路 长 780 米 ， 甲 、 乙 两队 同时 修 ， 正好 6 天 修 完 ． 甲队 平均 每天 修 58 米 ， 乙 队 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13447", "content": "一 辆 汽车 从 甲 站 开往 乙 站 ， 已经 行 了 85 千米 ， 正好 是 两站 路程 的 (5/7) ． 汽车 离 乙 站 还有 多 远 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19288", "content": "125 减少 它 的 12% 再 乘以 (3/11) ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5241", "content": "姐姐 步行 速度 是 75 米 / 分 ， 妹妹 步行 速度 是 45 米 / 分 ． 在 妹妹 出发 20 分钟 后 ， 姐姐 出发 去 追 妹妹 ． 问 ： 多少 分钟 后 能 追 上 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1892", "content": "在 跳远 比赛 中 ， 小 明 跳 了 3.35 米 ， 小 刚 比 小 明 多 跳 了 0.21 米 ， 小强 比 小 刚 少 跳 了 0.18 米 ． 小强 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6388", "content": "修路 队 修 一段路 原 计划 每天 修 16.8 千米 ， 20 天 修 完 ， 实际 每天 比 原 计划 少 修 2.8 千米 ， 实际 修 了 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12331", "content": "一 支 钢笔 16 元 ， 一支 毛笔 的 价格 是 钢笔 的 (3/4) ， 一支 毛笔 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19374", "content": "一 条 公路 ， 甲队 修 了 120 米 ， 乙 队 接着 修 了 210 米 ， 乙 队 比 甲队 多 修 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3125", "content": "一 桶 油 ， 第一次 倒 出 (2/5) ， 第 二 次 倒 出 20 千克 ， 桶 里 还 剩下 28 千克 ． 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2514", "content": "某 筑路 队 修 一条 通往 山区 的 公路 ， 已经 修 了 (3/4) ， 还 剩 6 千米 ， 这 条 公路 已经 修 了 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16416", "content": "甲 、 乙 两个 工程队 合 修 一条 长 1500 米 的 公路 ， 他们 从 两端 同时 开工 ， 10 天 完成 任务 ． 甲队 每天 修 70 米 ， 乙 队 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6172", "content": "服装厂 要 加工 2080 套 校服 ， 前 4 天 加工 了 640 套 ， 照 这样 计算 ， 完成 其余部分 任务 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11700", "content": "食堂 运 来 一批 煤 ， 已经 用 去 (1/4) ， 正好 用 去 (4/5) 吨 ， 这 批 煤 原有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8967", "content": "工程队 挖 一条 水渠 ， 每天 挖 1.4 千米 ， 10 天 挖 了 全长 的 (7/10) ， 还 剩 多少 千米 没有 挖 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1105", "content": "把 一根 钢筋 锯 成 5 段 ， 需要 20 分钟 ， 如果 用 同样 的 速度 把 它 锯 成 10 段 ， 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3276", "content": "玩具厂 计划 生产 一批 玩具 ， 已经 生产 了 6 天 ， 平均 每天 生产 148 件 ， 还要 生产 582 件 才能 完成 任务 ． 这 批 玩具 一共 有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4030", "content": "多少 米 比 30 米 多 (1/6) ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15637", "content": "a 的 (1/5) 是 12 ， a = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5059", "content": "一 本 故事书 有 180 页 ， 小雅 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 全书 的 (1/4) ． 小雅 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14962", "content": "一 条 公路 ， 每天 修 它 的 (3/20) ， 修 了 5 天 后 还 剩下 它 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5457", "content": "修路 队 修 一条 长 1200 米 的 公路 ， 已经 修 了 它 的 (3/4) ， 还 剩下 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5292", "content": "六年级 选出 3 好生 24 人 ， 占 本 年级 人数 的 (1/6) ， 六年级 人数 恰好 是 全校 的 (2/9) ， 全校 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1153", "content": "一 本 故事书 ， 已 读 了 (3/7) ， 未 读 页数 比 已 读 页数 多 15 页 ． 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11856", "content": "两个 火车站 相距 425 千米 ， 甲 、 乙 两列 火车 同时 从 两个 火车站 相对 开出 ， 经过 2.5 小时 相遇 ． 甲 车 每 小时 行 90 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18346", "content": "园林 工人 在 公路 的 一边 每隔 6 米 种 一棵树 ， 一共 种 了 201 棵 ． 从 第 一棵 到 最后 一棵 的 距离 = 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7216", "content": "比 2.5 的 1.6 倍 多 1.2 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "573", "content": "老鼠 每分钟 心跳 大约 500 次 ， 大象 每分钟 心跳 次数 约 是 老鼠 的 (2/25) ， 约 是 猫 的 (1/6) ． 猫 每分钟 心跳 约 多少 次 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7000", "content": "一 堆 煤 重 2 吨 ， 用 去 了 (1/2) 吨 ， 还 剩下 几分 之 几吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18131", "content": "某 工厂 上个月 实际 生产 轿车 10800 辆 ， 比 计划 多 生产 了 2800 辆 ， 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8476", "content": "养鸡场 养 有 公鸡 125 只 ， 母鸡 的 只 数 是 公鸡 的 2 倍 ， 养鸡场 共养 了 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6306", "content": "85 与 728 的 积 减去 4028 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16785", "content": "一 批 煤 ， 按计划 每天 烧 5.4 吨 计算 ， 可 烧 50 天 ， 实际 每天 节约 0.4 吨 ， 这 批 煤 实际 可 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18376", "content": "某校 五年级 共有 学生 152 人 ， 选出 男同学 的 (1/11) 和 5 名 女同学 参加 科技 小组 ， 剩下 的 男女 同学 人数 相等 ， 该校 原来 有 男同学 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9668", "content": "一 堆 煤 重 2.4 吨 ， 甲 车 运走 了 全部 的 (1/4) ， 乙 车 运走 了 剩下 的 (2/3) ． 乙 车 运走 了 多少 吨 煤 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12968", "content": "甲 、 乙 、 丙 3 个 油桶 ， 甲 桶装 油 (3/4) 千克 ， 乙 桶装 油 (4/5) 千克 ， 丙 桶装 的 油 比 甲 、 乙 两桶 之 和 少 (7/10) 千克 ． 丙 桶装 油 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6749", "content": "修路 队 修 一条 路 ， 第一天 修 了 (9/20) 千米 ， 第 二 天 比 第一天 少 修 了 (3/20) 千米 ． 两天 一共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6836", "content": "每 立方厘米 的 银 重 (21/2) 克 ， 比 每 立方厘米 铅 轻 (3/38) ． 每 立方厘米 铅 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7817", "content": "一 个数 除以 6 ， 商 7 ， 余 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22437", "content": "小巧 3 分钟 跳绳 216 个 ， 照 这样 的 效率 ， 她 再 跳 144 个 ， 需要 几分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "179", "content": "光明 小学 扩建 教学楼 ， 原 计划 投资 40 万元 ， 实际 用 了 36 万元 ， 实际 投资 是 计划 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "97", "content": "五年级 同学 站队 时 ， 站 成 5 人 一排 或 7 人 一排 都 还 剩 3 人 ， 五年级 至少 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16101", "content": "“ 6 一 ” 节 那天 ， 同学 们 买 了 150 个 气球 来 装扮 教室 ， 每个 教室 需要 25 个 气球 ． 照 这样 计算 ， 这些 气球 能 装扮 多少 间 教室 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4458", "content": "某校 有 16 个 班 ， 平均 每班 45 人 ， 每个 学生 每学期 可 收集 废纸 2 千克 ， 全校学生 一共 可以 收集 多少 千克 废纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11619", "content": "小 明 有 6 张 卡片 ， 小 红 的 卡片 数 是 小 明 的 2 倍 ， 小 红 和 小 明 一共 有 卡片 多少 张 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7893", "content": "杨师傅 3 小时 生产 零件 225 个 ， 技术革新 后 ， 2 小时 生产 180 个 ， 生产 效率 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12043", "content": "五年级 3 班 的 同学 去 爬山 ， 上山 的 速度 是 4 千米 / 时 ， 用 了 3 小时 ； 下山 按 原 路 返回 ， 返回 时 少 用 了 1 个 小时 ， 他们 下山 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20178", "content": "某 商店 将 某种 dvd 按 进价 提高 35% ， 然后 打出 “ 0.9 促销 ” ， 外 送 50 元 出租车费 的 广告 ， 结果 每 台 仍 获利 208 元 ， 那么 每 台 dvd 的 进价 = ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13892", "content": "三年级 二 班 图书 角 有 图书 674 本 ， 借出 了 253 本 ， 还 回 了 137 本 ， 现 图书 角 有 多少 本 图书 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10617", "content": "甲 、 乙 两地 相距 216 千米 ， 乘 轮船 4 小时 可以 到达 ． 轮船 平均 每个 小时 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21305", "content": "学校 组织 学生 到 奇怪 道 科技馆 参观 ， 并 将 参观 人数 平均 分成 12 个 小组 ， 每个 小组 由 4 名 学生 和 2 名 老师 ． 参观 的 学生 平均 乘坐 8 辆 汽车 ， 每辆车 乘坐 多少 名 学生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19005", "content": "120 的 20% 比 某 数 的 (4/5) 少 24 ， 求 这个 数 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13368", "content": "有 200 辆 自行车 ， 卖出 (7/10) ， 还 剩 多少 辆 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3503", "content": "两列 火车 从 两个 车站 相对 开出 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 54 千米 ， 经过 4.5 小时 相遇 ． 两 车站 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15533", "content": "一 个 修路 队 要 修路 726 米 ， 已经 修 了 285 米 ， 剩下 的 要 7 天 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20072", "content": "妈妈 买 了 9 支 钢笔 ， 给 小 冬 5 支 ， 小 立 4 支 ， 小 冬 拿 了 这些 钢笔 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1085", "content": "甲乙 两个 圆柱体 容器 ， 底 面积 之 比 是 5 ： 3 ， 甲 容器 水深 20 厘米 ， 乙 容器 水深 10 厘米 ， 再 往 容器 里 注入 同样 多 的 水 ， 使 两个 容器 中 的 水深 相等 ， 这时 水深 多少 厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6578", "content": "甲 、 乙 两个 工程队 共同 安装 一条 燃气管 道 ， 甲队 每天 安装 62.5 米 ， 乙 队 每天 安装 77.2 米 ， 10 天 完成 任务 ． 这 条 燃气管 道 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16962", "content": "羽毛球 有 32 个 ， 乒乓球 的 个数 比 羽毛球 多 (3/8) ， 乒乓球 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16769", "content": "一 种 洗衣机 现价 1080 元 ， 比 原价 降低 了 20% ， 这种 洗衣机 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "287", "content": "一 批 水果 ， 如果 卖出 这 批 水果 的 (3/8) ， 还 剩下 40 箱 ． 这 批 水果 原来 有 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10496", "content": "一 桶 油 ， 第一次 用 去 (3/5) 千克 ， 第 二 次 用 去 (5/6) 千克 ， 还 剩 (5/8) 千克 ， 这 桶 油 原 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11771", "content": "爷爷 养 白兔 820 只 ， 比 黑 兔 多 120 只 ， 爷爷 家 一共 养 了 多少 只 兔 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10896", "content": "运 一批 水果 ， 第一次 运 了 20% ， 如果 再 运 30 吨 ， 那么 这时 已 运 的 与 剩下 的 吨数 比 是 1 ： 3 ， 这 批 水果 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2345", "content": "甲 、 乙 两地 之间 的 公路 长 216 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 (3/8) ， 离 甲地 有 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17068", "content": "小兵 买 了 一支 钢笔 和 一支 圆珠笔 ， 钢笔 的 单价 是 13.56 元 ， 圆珠笔 的 单价 是 3.79 元 ， 小兵 一共 花 了 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10503", "content": "机床厂 投资 4200 万元 建 厂房 ， 比 原 计划 节约 了 (1/7) ， 原 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19455", "content": "水果 批发商 售出 1052 千克 桔子 后 ， 还 剩 12 箱 ， 每箱 24 千克 ． 原来 桔子 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19941", "content": "顾 老师 去年 把 5000 元 钱 存入 银行 ， 整存整取 一年 ， 年利率 为 3.5% ， 到期 时 可 得 本金 和 利息 共计 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6201", "content": "育才 小学 五年级 有 学生 480 人 ， 六年级 学生 人数 比 五年级 多 (1/10) ， 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17553", "content": "做 一项 工程 ， 甲 、 乙 两队 合作 要 10 天 完成 ． 甲 独 做 3 天 后 ， 乙 接着 独 做 2 天 ， 共 完成 全部 工程 的 (1/4) ． 甲队 独 做 ， 完成 这项 工程 要 多少 天 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11054", "content": "有 3 箱 毛巾 ， 每箱 装 12 包 ， 每包 20 条 ． 共有 毛巾 多少 条 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17499", "content": "某 车间 要 生产 2100 个 零件 ， 计划 用 12 天 完成 ， 由于 改进 了 生产 技术 ， 实际 每天 多 生产 了 35 个 零件 ， 完成 这项 生产 任务 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11613", "content": "一 个 长方形 的 长 30 米 ， 宽 16 米 ， 与 它 面积 相等 的 平行四边形 的 底 是 20 米 ， 高 = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21503", "content": "商场 运 来 240 千克 鲜蛋 ． 上午 卖出 总数 的 (1/3) ， 下午 卖出 上午 的 (7/8) ． 下午 卖出 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8720", "content": "一 座 大桥 全长 2000 米 ， 一列 火车 通过 大桥 时 每分钟 行驶 250 米 ， 从 火车头 开始 上 桥 到 车尾 离开 桥 共 需 10 分钟 ， 这 列 火车 车身 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5421", "content": "展览会 上午 来 了 216 人 参观 ， 下午 有 4 批 人 来 参观 ， 每批 49 人 ， 这 一天 一共 有 多少 人 来 参观 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10901", "content": "两箱 梨 ， 从 甲 箱 中 取出 (1/4) ， 从 乙 箱 中 取出 (1/5) ， 这时 两箱 剩下 的 梨 质量 相等 ． 已知 甲 箱 原有 梨 160 千克 ， 乙 箱 原有 梨 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4474", "content": "大卡车 每次 载运 货物 6 吨 ， 小 卡车 每次 载运 货物 1.5 吨 ， 大卡车 5 次 可 运 完 的 货物 ， 小 卡车 几次 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "255", "content": "建筑工地 运 来 6000 块 青砖 ， 运 的 红砖 是 青砖 的 75% ， 两种 砖 共运 来 多少 块 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12951", "content": "一 台 织布机 5 小时 织布 30 米 ， 照 这样 ， 再 织 2 小时 ， 共 织布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1902", "content": "一 艘 轮船 从 甲 港 开往 乙 港 ， 前 7 小时 航行 175 千米 ， 照 这样 的 速度 ， 再 航行 32 小时 才 到达 乙 港 ， 甲乙 两 港 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19690", "content": "工人 师傅 修 一条 路 ， 甲队 每天 能 修 这 条 路 的 (1/20) ， 乙 队 每天 能 修 这 条 路 的 (1/30) ， 两队 合 修 ， 每天 能 修 这 条 路 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4539", "content": "小 丽 走进 教室 ， 看见 教室 里 只有 7 名 同学 ， 那么 现在 教室 里 有 几名 同学 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16717", "content": "某 工程队 修路 两周 修 完 ． 第一周 修 了 全程 的 (3/5) ， 第 二 周 修 了 240 米 ． 第一周 修 了 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7708", "content": "一 台 拖拉机 上午 工作 5 小时 ， 平均 每 小时 耕地 15 公亩 ， 下午 工作 3 小时 ， 共 耕地 36 公亩 ， 求 拖拉机 一天 平均 每 小时 耕地 多少 公亩 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9872", "content": "5 （ 1 ） 班 有 学生 40 人 ， 其中 13 人 参加 了 “ 春 芽 杯 ” 书画 比赛 ， 参加 比赛 的 人数 占 全班 人数 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7918", "content": "甲乙 合 修 一段 公路 ， 乙 修 了 全长 的 (2/5) 时 ， 甲 比 乙 多 (1/8) ． 已知 这时 甲 修 了 210 米 ， 这 段 公路 有 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20", "content": "一 个数 除以 12 ， 商 3 余 7 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6878", "content": "有 一只 长颈鹿 高 (61/10) 米 ， 比 一头 大象 高 的 (5/2) 还 多 (1/10) 米 ， 这 头 大象 高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3472", "content": "学校 购回 一批 新书 ， 分给 六年级 (1/5) 后 ， 剩下 的 按 3 ： 4 ： 5 分给 3 、 4 、 五年级 ， 其中 五年级 分 得 40 本 ． 这 批 新书 共有 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "429", "content": "小 亮 妈妈 今年 元月 1 日 购买 了 20000 的 国债 ， 年利率 为 3.14% 到期 是 她 可 获 本息 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19826", "content": "实验 小学 买来 36 支 彩色 铅笔 和 24 支 普通 铅笔 ， 把 它们 平均 分给 三年级 的 3 个 班 ， 每班 可以 分 得 多少 支 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4864", "content": "甲 、 乙 两车 同时 从 东 、 西 两城 出发 相向 而 行 ， 4 小时 相遇 ， 已知 甲 车 平均 每 小时 行 85 千米 ， 乙 车 平均 每 小时 行 65 千米 ． 东 、 西 两城 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21985", "content": "往 20 千克 盐 中 加入 多少 千克 水 ， 可 得到 含盐 率 为 4% 的 盐水 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19865", "content": "水果店 上午 卖出 28 箱 苹果 ， 下午 卖出 了 33 箱 ， 下午 比 上午 多 卖 了 365 元 ， 每箱 苹果 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5390", "content": "客船 从 甲 港 开往 乙 港 ， 每 小时 行 24 千米 ． 货船 从 乙 港 开往 甲 港 ， 12 小时 行 完全 程 ． 现 同时 相对 开出 ， 相遇 时 ， 客船 和 货船 所 行 路程 之 比 为 6 ： 7 ， 甲乙 两 港 间 的 距离 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4052", "content": "从 296 里 减 4 ， 连续 减 多少 次 ， 结果 是 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13180", "content": "汽车 从 甲地 到 乙地 送货 ， 去 时 用 了 6 小时 ， 速度 是 32 千米 / 小时 ， 回来 只用 了 4 小时 ， 回来 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3248", "content": "一 辆 汽车 运河 沙 ， 每次 能够 运 15 吨 ， 运 了 12 次 后 还 剩下 180 吨 ， 以后 每次 多 运 3 吨 ， 还要 多少 次 就 能够 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1746", "content": "一 件 商品 的 售价 为 2000 元 ， 其 亏损率 为 20% ， 求 此 商品 的 成本价 为 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21268", "content": "仓库 里 有 15 吨 钢材 ． 第一次 用 去 总数 的 (1/5) ， 第 二 次 用 去 (1/2) 吨 ， 两次 共用 去 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11975", "content": "学校 教学楼 高 4 层 ， 每层 有 8 间 教室 ， 每间 教室 最 多 坐 56 名 学生 ． 教学楼 最 多 能 容纳 多少 名 学生 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16763", "content": "修路 队 20 天 修 了 一条 长 4 千米 的 乡村 公路 ． 平均 每天 修 了 这 条 乡村 公路 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12991", "content": "某班 有 40 名 学生 ， 其中 参加 数学 兴趣小组 的 学生 有 25 名 ， 参加 语文 兴趣小组 的 学生 有 27 名 ， 两个 小组 都 参加 的 学生 至少 有 多少 名 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15233", "content": "王经理 每月 工资 2260 元 ， 按 个人所得税法 规定 ， 月 收入 超过 1800 元 的 部分 ， 应 按照 5% 的 税率 征收 个人所得税 ． 王经理 每月 实际收入 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17577", "content": "王师傅 加工 250 个 零件 ， 已经 完成 了 40% ， 还 剩下 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5583", "content": "325 的 8 倍 再 加上 1007 得 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16919", "content": "修 一段 高速公路 ， 已经 修 了 60% ， 还 剩下 20 千米 没有 修 ， 这 段 高速公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5788", "content": "有 含盐 8% 的 盐水 40 千克 ， 要 配制 成 含盐 20% 的 盐水 ， 须 加盐 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2179", "content": "一 个 长方体 油箱 ， 从 里面 量 得 它 的 长 是 8 分 米 ， 宽 是 5 分 米 ， 高 是 4 分 米 ． 如果 每 升 柴油 重 0.85 千克 ， 这个 油箱 最 多 可 装 柴油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6709", "content": "王老师 准备 贷款 购买 一套 售价 30 万元 的 商品房 ， 银行 规定 贷款 买房 必须 首付 20% ， 王老师 要 买 这 套房 必须 首付 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4100", "content": "仓库 有 800 包 粮食 ， 上午 运走 了 250 包 ， 下午 运走 了 375 包 ， 还 剩 多少 包 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7905", "content": "(3/10) + (5/10) 的 结果 用 小数 表示 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4365", "content": "一 根 彩条 长 12 米 ， 截去 (1/3) ， 再 接上 13 米 ， 这时 彩条 长 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20420", "content": "电视机厂 去年 下半年 生产 电视机 48 万台 ， 是 上半年 产量 的 80% ． 这个 电视机厂 上半年 生产 电视机 多少 万台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10055", "content": "王 伯伯 家 的 果园 今年 收 了 450 千克 桔子 ， 收 的 苹果 是 桔子 的 15 倍 ． 两种 水果 共 收 了 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7238", "content": "60 的 (2/5) 的 (1/12) = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11178", "content": "火车 48 小时 行驶 5920 千米 ， 汽车 25 小时 行驶 2250 千米 ， 汽车 平均 每 小时 比 火车 每 小时 慢 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14231", "content": "(1/2) 与 (1/3) 的 和 除 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21401", "content": "计算 ： 13.5 * 9.9 + 6.5 * 10.1 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "257", "content": "小 丽 比 小 兰 多 12 张 邮票 ， 小 兰 的 张 数 比 小 丽 少 (1/6) ， 小 兰 有 多少 张 邮票 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22711", "content": "口袋 里 有 6 个 红球 和 3 个 黄 球 ， 它们 除 颜色 外 完全相同 ． 现在 从中 摸 出 1 个 球 ， 是 红色 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3593", "content": "把 5 米 长 的 绳子 平均 分成 6 份 ， 每份 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12521", "content": "老师 带 三年级 同学 去 植树 ， 共 植 了 54 排 ， 每排 6 棵 ， 一共 植 了 多少 棵 树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5723", "content": "一 个数 除以 5 ， 商 是 8 ， 余数 是 3 ， 求 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11993", "content": "种子 站 做 发芽 实验 ， 种子 的 发芽率 是 97.5% ， 要 得到 390 棵 芽 ， 需要 种子 多少 粒 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19338", "content": "修路 队 第一天 修路 725 米 ， 比 第 二 天 少 245 米 ， 两天 一共 修 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2135", "content": "四年级 同学 去 果园 劳动 ， 女同学 29 人 ， 男同学 有 35 人 ， 4 个 同学 分成 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6828", "content": "把 50 克 糖 溶解 在 300 克 水中 化成 糖水 ， 糖 占 糖水 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10912", "content": "一 个 圆形 花圃 周长 36 米 ， 每隔 3 米 放 一 盆花 ， 一共 放 了 多少 盆花 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13641", "content": "一 个数 除以 7 ， 商 是 36 ， 余数 是 4 ． 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21183", "content": "饲养场 养鸡 280 只 ， 比 鸭 多 (2/5) ， 饲养场 养鸭 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15187", "content": "一 件 皮衣 原价 每件 426 元 ， 现在 降价 (1/6) ， 现在 每件 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17532", "content": "同学 们 参加 植树 活动 ， 计划 植 355 棵 ， 已经 植 了 265 棵 ， 剩下 的 由 9 名 同学 来 植 ， 平均 每个 同学 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15151", "content": "今年 植树节 ， 我市 组织 万名 人员 参加 植树 活动 ， 在 一片 山岗 上 种 了 36 行 ， 每行 共 26 棵 ， 这次 活动 一共 种 了 多少 棵 树 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14403", "content": "五年级 的 同学 利用 课余时间 擦 正德 学校 教室 的 窗户 玻璃 ， 第一周 擦 了 全校 教室 窗户 玻璃 的 40% ， 第 二 周 擦 了 12 间 教室 窗户 玻璃 ， 还 剩 6 间 教室 窗户 玻璃 没有 擦 ， 正德 学校 一共 有 多少 间 教室 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23047", "content": "一 根 铁丝 ， 第一次 用 去 (3/7) 米 ， 比 第 二 次 多用 去 (1/7) 米 ， 两次 一 共用 去 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20062", "content": "本次 考试 共有 560 名 学生 参加 ， 其中 (13/16) 的 学生 做 对 了 最后 一 题 ， 而 在 这些 人 中 又 有 (4/35) 的 学生 得到 了 满分 ， 求 本次 考试 满分 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22010", "content": "光华 小学 有 3 好 学生 210 人 ， 它 的 (3/7) 正好 是 全校 人数 的 (3/35) ， 这个 学校 共有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12393", "content": "光明 小学 三年级 植树 60 棵 ， 四年级 植 的 棵 数 是 三年级 的 2 倍 ， 五年级 植 的 比 四年级 的 棵 数 少 15 棵 ． 五年级 植树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9607", "content": "学校 种植 组 种植 一批 树苗 ， 同学 们 的 “ 种植 报告 ” 说 ： “ 据统计 ， 这 批 树苗 的 死亡率 是 8% ． ” 那么 你 知道 这 批 树苗 的 成活率 = 多少 % ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22071", "content": "弟弟 出门 购物 ， 出行 的 速度 是 每 小时 6 千米 ， 2 小时 后 ， 妈妈 有事 要 通知 弟弟 ， 所以 安排 哥哥 骑车去 追 弟弟 ． 已知 哥哥 骑车 的 速度 是 每 小时 18 千米 ， 那么 ， 多少 个 小时 后 ， 哥哥 能 追 上 弟弟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "652", "content": "五年级 捐 了 597 本书 ， 50 本 包 成 一包 ， 包 了 11 包 ， 还 剩 几本书 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3802", "content": "学生 食堂 买来 面粉 600 千克 ， 买 大米 的 重量 比 面粉 的 3 倍 还 多 45 千克 ， 共 买 粮食 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11107", "content": "例 5 ： 甲 、 乙 二 人 沿 运动场 的 跑道 跑步 ， 甲 每分钟 跑 290 米 ， 乙 每分钟 跑 270 米 ， 跑道 一圈 长 400 米 ． 如果 两 人 同时 从 起跑线 上 同方向 跑 ， 那么 甲 经过 多长时间 才能 第一次 追 上 乙 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12221", "content": "挖 一条 20 千米 的 水渠 ， 第一天 挖 了 全长 的 (1/4) ， 第 二 天 挖 了 全长 的 (1/5) ． 两天 一共 挖 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11326", "content": "据 测算 阔叶林 3 天 可以 放出 氧气 2.19 吨 ， 照 这样 计算 一个月 可以 放出 多少 吨 氧气 ？ （ 以 30 天 计 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1775", "content": "王师傅 连续 工作 了 18 天 ， 平均 每天 生产 零件 150 个 后 完成 了 生产 任务 ， 李师傅 要 完成 同样 个数 的 零件 需要 25 天 ， 李师傅 每天 生产 零件 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9779", "content": "五年级 有 学生 180 人 ， 六年级 的 学生 人数 比 五年级 的 多 (5/9) ， 六年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5527", "content": "从 篮子 里 拿出 2 个 都 是 50 克 重 的 鸡蛋 ， 篮子 里 还 剩下 400 克 鸡蛋 ， 篮子 里 原来 有 鸡蛋 多少 克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17602", "content": "一 种 洗衣机 ， 原价 1600 元 ， 现价 1400 元 ． 洗衣机 的 价格 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6849", "content": "修路 队 修 一条 1200 米 的 路 ， 已经 修 了 5 天 ， 每天 修 80 米 ． 剩下 的 要 8 天 完成 ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8360", "content": "师傅 每 小时 做 零件 48 个 ， 徒弟 3 小时 做 120 个 ， 师傅 和 徒弟 每 小时 共 做 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22042", "content": "甲 、 乙 两辆 汽车 分别 同时 从 a 、 b 两地 相对 开出 ， 甲 车 每 小时 行 50 千米 ， 乙 车 每 小时 行 60 千米 ， 经过 4 小时 两车 共 行 了 全程 的 80% ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12445", "content": "宇航员 在 月球 上 的 体重 相当于 地球 上 的 20% ， 一位 宇航员 到 月球 上 体重减轻 了 64 千克 ． 这位 宇航员 在 地球 上 的 体重 = 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10202", "content": "有 (12/5) 升 桔子 汁 ， 分装 在 同样 的 8 个 瓶子 里 ， 平均 每个 瓶子 装 多少 升 桔子 汁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4501", "content": "白糖 比 红糖 多 300 千克 ， 红糖 比 白糖 少 (3/5) ， 白糖 有 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21353", "content": "同乐 学校 五年级 学生 在 进行 的 废品 回收 活动 中 ， 一个月 内 共 回收 废品 240 千克 ， 其中 男生 回收 的 废品 占 回收 废品 总数 的 (7/12) ， 男生 回收 的 废品 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10369", "content": "某 公园 在 一块 正方形 草坪 4 周 摆放 盆花 ， 要 使 每 边 都 放 25 盆 （ 4 个 顶角 各 放 1 盆 ） ， 一共 要 多少 盆花 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10438", "content": "星期一 花果山 桔园 里 摘 桔子 ， 25 千克 装 一袋 ． 装 好 28 袋 后 ， 还 剩 15 千克 ． 星期一 共 摘 了 多少 千克 桔子 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14787", "content": "一 根 200 厘米 长 的 木条 ， 要 锯 成 4 段 ， 每 锯 一次 需要 3 分钟 （ 锯 的 时候 不能 重叠 ） ， 一共 要 用 多少 分钟 锯 完 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7411", "content": "小 明 家 离 学校 900 米 ， 他 每天 步行 上学 ． 从 家 出发 后 12 分钟 到校 ． 他 平均 每分钟 走 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "43", "content": "修路 队 修 一条 路 ， 已经 修好 了 24 千米 ， 占 全长 的 (2/5) ， 这 条 路 长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21315", "content": "3 和 它 的 倒数 的 差 乘 (5/12) ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22579", "content": "王 强 的 身高 是 180 厘米 ， 比 赵 芳 高 12.5% ． 赵 芳 的 身高 = 多少 厘米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6443", "content": "计算 ： 4 * 37 * 25 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "36", "content": "一 件 工作 ， 甲 做 9 天 可以 完成 ， 乙 做 6 天 可以 完成 ． 现在 甲 先 做 了 3 天 ， 余下 的 工作 由 乙 继续 完成 ． 乙 需要 做 几天 可以 完成 全部 工作 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "934", "content": "建筑工地 运 来 水泥 74 吨 ， 运 来 的 黄沙 是 水泥 的 3 倍 多 12 吨 ， 运 来 黄沙 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7791", "content": "小 军 看 一本 100 页 的 书 ， 看 了 7 天 后 ， 还有 37 页 没 看 完 ， 小 军 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19999", "content": "工厂 加工 一批 零件 ， 若 每天 加工 207 个 ， 11 天 可 完成 ， 如果 要 想 提前 2 天 完成 ， 每天 应 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19405", "content": "同一个 物体 在 月球 上 受到 的 引力 只有 在 地球 上 受到 的 引力 的 (1/6) ． 在 月球 上 受到 72 牛顿 引力 的 物体 ， 在 地球 上 受到 多少 牛顿 的 引力 ？ （ 牛顿 是 重力单位 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19343", "content": "南华 小学 图书馆 藏书 3200 册 ， 故事书 占 藏书 总数 的 (1/4) ， 科普 书册 数 是 故事书 的 (7/4) ， 科普 书 有 多少 册 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4680", "content": "迎 世博 ， 整治 公路 ， 一条 长 120 米 的 公路 ， 已经 修 了 (5/6) ， 还有 多少 米 没 修 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19565", "content": "我校 一直 教育 学生 要 “ 勤俭节约 ， 理解 孝顺父母 ” ， 有 一天 ， 张 明 的 妈妈 给 了 20 元 给 他 当作 一周 的 零花钱 ， 而 张 明 只要 了 (4/5) ， 你 知道 孝顺 的 张 明 退 了 多少 钱 给 妈妈 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3224", "content": "超市 新 进 了 一批 服装 ， 第一天 售出 总量 的 (2/7) ， 第 二 天 售出 总量 的 (3/7) ， 两天 一共 售出 总量 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6094", "content": "战旗 学校 学生 参加 少年宫 活动 ， 参加 美术 小组 有 50 人 ， 比 参加 音乐 小组 的 人数 多 (1/4) ， 参加 音乐 小组 的 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22899", "content": "850 - 25 与 8 的 积 ， 再 除以 13 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5782", "content": "商店 运 来 一批 水果 ， 其中 苹果 有 600 千克 ， 梨子 有 375 千克 ． 每 25 千克 装 一箱 ， 苹果 比 梨子 多 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15940", "content": "丰华 电风扇 厂 今年 计划 生产 风扇 9600 台 ， 已经 生产 了 8480 台 ， 余下 的 要 用 40 天 完成 ， 平均 每天 要 生产 多少 台 风扇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18833", "content": "操场上 有 7 名 男同学 和 3 名 女同学 在 跳绳 ， 男同学 占 跳绳 总 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5474", "content": "一 个数 的 (5/8) 比 12 的 (3/2) 倍 多 15 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9336", "content": "72 与 8 的 商 ， 加上 52 * 27 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5316", "content": "学校 篮球队 用 440 元 购买 了 8 个 篮球 ， 后 因 队员 发展 ， 决定 再 购买 同样 的 篮球 24 只 ， 学校 还 需要 花 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20071", "content": "修路 队 修 一段 长 1200 米 的 公路 ， 修 了 4 天 ， 修 了 这 段 公路 的 (1/5) ． 照 这样 计算 ， 修 完 这 段 公路 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "860", "content": "妈妈 买 了 240 个 苹果 ， 每层 装 8 个 ， 每箱 装 3 层 ， 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5864", "content": "甲 、 乙 两地 相距 660 千米 ， ab 两地 汽车 同时 从 甲乙 两地 相对 开出 ， 经过 6 小时 相遇 ， a 车 每 小时 50 千米 ， 相遇 后 两车 继续 行驶 了 2 小时 ， 这 是 b 车 一共 走 了 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4577", "content": "一 堆 煤 3 吨 ， 用 去 总数 的 (4/5) ， 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17040", "content": "把 一根 长 7 米 得 竹竿 插 在 池里 ， (1/5) 露出 水面 ， 其余 的 (2/7) 插 在 泥 里 ， 问 水深 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "21823", "content": "6 （ 1 ） 班 有 26 个 男生 ， 24 个 女生 ， 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18793", "content": "简 算 ： 21500 / 125 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18963", "content": "商店 运 来 120 千克 的 苹果 ， 运 来 的 梨 比 苹果 多 (1/5) ， 商店 运 来 多少 千克 的 梨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20560", "content": "一 条 绳子 长 125 米 ， 用 去 了 全长 的 40% ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6671", "content": "副食 商店 用 塑料袋 分装 80 千克 牛奶糖 ， 如果 每 袋装 (1/4) 千克 ， 这些 牛奶糖 可 装 多少 袋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5808", "content": "长安 国际 酒店 运 来 一些 大米 ， 吃 了 (2/5) ， 正 好吃 了 2 吨 ， 酒店 运 来 大米 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17537", "content": "操场上 有 15 排 同学 做 早操 ， 每排 人数 相等 ． 王 苑 站 在 第 5 排 ， 从 排头 开始 数 ， 她 是 第 5 个 ， 从 排 尾数 起 ， 她 是 第 7 个 ， 操场上 一共 有 多少 个 同学 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18436", "content": "希望 号 客轮 原有 乘客 618 人 ， 到达某 港 后 ， 有 157 人 离 船 ， 另 有 248 人 上船 ， 现在 客轮 上 有 多少 乘客 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10486", "content": "水果店 第一天 运 来 西瓜 150 千克 ， 第 二 天运 来 的 是 第一天 的 2 倍 ， 两天 一共 运 来 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3127", "content": "工程队 修 一条 公路 ， 原 计划 每天 修 60 米 ， 30 天 完成 ， 实际 提前 5 天 完成 任务 ， 实际 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9971", "content": "一 批 货物 322 吨 ， 如果 用 一辆 载重量 为 3.5 吨 的 中型 卡车 来 运 ， 需 几次 才能 把 这 批 货物 全部 运 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20387", "content": "比 的 后 项 是 (4/15) ， 比值 是 (4/3) ， 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21369", "content": "王大妈 用 50 元 买 了 5 千克 大米 ， 共用 去 21.5 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6248", "content": "羚羊 在 遭到 猎豹 追捕 时 ， 以 120 米 / 分 的 速度 奔跑 ． 12 分钟 后 ， 羚羊 跑 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13757", "content": "一 个 因数 是 6 ， 另 一个 因数 是 1050 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11555", "content": "3 个 荤菜 和 8 个 素菜 ， 按 一荤一素 搭配 ， 可以 有 多少 种 搭配 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4341", "content": "某班 有 女生 30 人 ， 男生 比 女生 少 (1/5) ， 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19911", "content": "有 含盐 15% 的 盐水 600 克 ， 现 要 配制 成 含盐 8% 的 盐水 ， 需 加水 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10162", "content": "一 列 火车 ， 先 以 每 小时 65 千米 的 速度 行 3 小时 ， 又 以 每 小时 80 千米 的 速度 行 了 2 小时 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "713", "content": "3 、 四年级 的 学生 采集 树种 ， 三年级 采集 了 12.6 kg ， 四年级 采集 的 树种 比 三年级 多 2.8 kg ． 两个 年级 共 采集 了 多少 kg ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19731", "content": "840 是 21 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10392", "content": "汽车 运输 公司 要 运送 一批 货物 ， 第一天 运 了 总数 的 (1/4) ， 第 二 天运 了 300 吨 ， 这时 已 运 的 与 未 运 的 吨数 比 是 3 ： 2 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "494", "content": "李 刚 和 王 红 都 在 看 《 童话故事 》 这 本书 ， 全书 共有 120 页 ． 李 刚 每天 看 12 页 ， 王 红 每天 看 15 页 ． 王 红 比 李 刚 提前 几天 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18209", "content": "一 种 商品 如果 每件 定价 20 元 ， 可 盈利 25% ， 如果 想 每件 商品 盈利 50% ， 则 每件 商品 定价 应为 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20624", "content": "花园 小学 合唱团 40 名 女生 要 订 新 演出服 ． 每件 上衣 118 元 ， 每 条 裙子 82 元 ． 一共 要 付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11318", "content": "在 400 米 长 的 环形 跑道 上 ， 甲 、 乙 二 人 同时 同 地 同 向 跑步 ， 甲 每秒 跑 5 米 ， 乙 每秒 跑 3 米 ， 两 人 起跑 后 的 第一次 相遇 点 在 起跑线 前 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10815", "content": "工人 叔叔 计划 加工 1000 个 零件 ， 已经 加工 了 202 个 ． 剩下 的 零件 如果 每天 加工 57 个 ， 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12629", "content": "6 只 小 猴 分 到 180 个 桃子 ， 现在 有 小 猴 72 只 ， 照 这样 的 分 法 ， 还 余下 90 个 桃子 ， 那么 共有 桃子 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2806", "content": "一 根 绳子 用 去 它 的 20% ， 还 剩 16 米 ， 这根 绳子 原来 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2192", "content": "比 的 前项 是 12 ， 比值 是 2.4 ， 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20196", "content": "学生 参加 环保 行动 要 运 2 吨 垃圾 ． 五年级 运 了 垃圾 的 (3/5) ， 六年级 运 了 垃圾 的 (1/8) ． 余下 的 留给 四年级 运 ， 四年级 运 了 垃圾 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23119", "content": "某 家电 卖场 运 来 液晶 电视机 250 台 ， 是 运 来 冰箱 台数 的 (5/3) ， 运 来 洗衣机 的 台数 是 冰箱 台数 的 (3/10) ， 运 来 洗衣机 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2660", "content": "一 辆 汽车 从 甲地 到 乙地 ， 每 小时 行 72 千米 ， (5/6) 小时 到达 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2028", "content": "我国 是 世界 上 13 个 贫 水 国家 之一 ， 水资源 人均 占有量 只有 2300 立方米 ， 约 为 世界 人均 水平 的 (1/4) ， 世界 水资源 人均 占有量 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15695", "content": "做 3 根 同样 长 的 绳子 用 去 塑料绳 12 米 ， 照 这样 计算 ， 做 这样 的 9 根 跳绳 要 塑料绳 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3739", "content": "希望 小学 图书馆 有 连环画 546 本 ， 比 科技 书 多 168 本 ， 科技 书 有 多少 本 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12858", "content": "小 宁 家 客厅 的 面积 是 30 ㎡ ， 它 的 宽 5 m ， 客厅 长 = 多少 m ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20564", "content": "甲 的 年龄 比 乙 的 年龄 少 (1/6) ， 乙 的 年龄 比 丙 的 年龄 多 (1/3) ， 甲 比 丙 大 4 岁 ． 求 ： 丙 的 年龄 = 多少岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20941", "content": "蓝 气球 有 9 个 ， 红 气球 是 蓝 气球 的 3 倍 ， 一共 有 气球 多少 个 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20773", "content": "春雷 小学 有 女生 400 人 ， 比 男生 少 (1/5) ， 男生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22830", "content": "小 岩 买 了 一瓶 橙汁 ， 喝 了 (3/5) ， 正好 是 300 毫升 ， 这 瓶 橙汁 总量 = 多少 毫升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1687", "content": "小 明 买 了 6 支 铅笔 和 4 本 练习本 ， 每 本 练习本 0.68 元 ， 每支 铅笔 0.24 元 ． 小 明 付出 5 元 钱 ， 应 找回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "4895", "content": "一 张 桌子 605 元 ， 一把 椅子 比 一张 桌子 便宜 20.5 元 ， 一张 桌子 和 一把 椅子 一共 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13471", "content": "一 条 公路 ， 已经 修好 了 305.6 千米 ， 比 没 修好 的 多 125.65 千米 ． 这 条 公路 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9652", "content": "冬冬 家 买来 一袋 面粉 ， 重 25 千克 ， 吃 了 (3/5) ， 吃 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22895", "content": "小 红 家 距 学校 480 米 ， 从 家 经 少年宫 再 到 学校 要 走 4400 米 ． 小 红 从 家 到 学校 走 了 12 分钟 ， 她 用 同样 的 速度 从 家 经 少年宫 再 到 学校 ， 一共 要 用 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9809", "content": "为 绿化 城市 ， 某 街道 要 栽种 一批 树苗 ， 这 批 树苗 的 成活率 是 75% - 80% ． 如果 要 栽 活 1200 棵 树苗 ， 至少 要 栽种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6952", "content": "建造 一幢 教学大楼 ， 实际 投资 142.5 万元 ， 比 计划 投资 节省 5% ， 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9398", "content": "买 7 个 日记本 用 14 元 钱 ， 每个 日记本 多少 元 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2641", "content": "小 王 看 一本 故事书 ， 第一天 看 了 25 页 ， 第 二 天 看 的 比 第一天 的 2 倍 还要 多 8 页 ， 还 剩下 35 页 ． 这本 故事书 一共 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21998", "content": "妈妈 将 5000 元 人民币 存入 银行 ， 定期 一年 ， 年利率 2.25% ， 利息税 20% ， 到期 后 ， 妈妈 可 从 银行 取回 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "6665", "content": "果园 里 有 21 棵 杏树 ， 27 棵 梨树 ， 桃树 的 棵 数 是 杏树 与 梨树 总和 的 (2/3) ， 有 多少 棵 桃树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2852", "content": "甲 、 乙 两个 队 合 修 一条 公路 ， 共同 工作 3 天 后 完成 全部 任务 的 75% ， 已知 甲 、 乙 两队 的 工作效率 之 比 是 2 ： 1 ， 余下 的 任务 由 甲队 单独 去 做 ， 还要 几天 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2051", "content": "小 明 看 一本 140 页 的 书 ， 他 每天 看 20 页 ， 看 完 这 本书 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12319", "content": "王师傅 8 小时 生产 640 个 零件 ， 李师傅 4 小时 生产 520 个 零件 ． 王师傅 平均 每 小时 比 李师傅 少 生产 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11370", "content": "小 方 和 小强 给 小树 浇水 ， 小 方 浇 了 (2/5) ， 小强 浇 了 多少 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18610", "content": "一 辆 卡车 以 75 千米 / 时 的 速度 ， 从 甲地 开往 乙地 ， 用 了 8 小时 ， 返回 时 用 了 15 小时 ， 返回 时 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1064", "content": "张 叔叔 一月份 的 工资 总收入 是 4200 元 ， 超出 3500 元 的 部分 按 3% 缴税 ， 张 叔叔 一月份 应 缴税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7900", "content": "54.4 / 多少 = 16 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6901", "content": "六年级 学生 有 学生 45 人 ， 期末 跳远 测验 有 (2/5) 的 同学 及格 ， 及格 的 同学 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1866", "content": "修 一条 路 ， 已修 了 全长 的 60% ， 如果 再 修 30 米 ， 这时 已修 的 米 数 与 未 修 米 数 的 比 是 7 ： 3 ， 这 条 路 = 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12063", "content": "30 米 减少 (1/6) 米 后 = 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "166", "content": "一 个 班 原来 有 48 人 ， 男生 有 30 人 ， 后来 又 转 来 多少 个 女生 ， 这时 女生 人数 占 全班 人数 的 40% ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14155", "content": "一 个 长方体 长宽 高 分别 是 10 厘米 、 8 厘米 、 5 厘米 ， 左面 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7766", "content": "小马 在 计算 一个 除法 算式 时 ， 把 被除数 114 错 写成 141 ， 结果 商 和 余数 都 比 原来 大 3 ． 则 这个 算式 的 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3028", "content": "一 列 货车 和 一列 客车 分别 从 甲 城 开往 乙 城 ， 货车 每 小时 行 40 千米 ， 货车 开出 2 小时 后 ， 客车 才 从 甲 城 开出 ， 每 小时 行 70 千米 ， 为了 保证 安全 ， 规定 两 车间 的 距离 不 应 小于 10 千米 ， 按 此 规定 ， 货车 最 晚 应该 在 开车 后 几小时 停下来 让 客车 通过 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1039", "content": "18 个 (3/4) - 3.5 与 0.48 的 和 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1656", "content": "化肥厂 5 月份 生产 化肥 12 万吨 ， 比 计划 多 生产 了 (1/5) ， 原 计划 生产 化肥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17930", "content": "一 头 蓝鲸 体重 是 156 吨 ， 是 一头 大象 的 26 倍 ， 这 头 蓝鲸 体重 比 大象 重 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14809", "content": "甲 、 乙 两地 之间 公路 长 420 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 用 了 3 小时 ， 行 了 全程 的 (3/7) ， 这辆 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19264", "content": "王 华 看 1 本 64 页 的 书 ， 第一天 看 了 18 页 ， 是 第 二 天 看 的 1.5 倍 ， 这时 还 剩下 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18819", "content": "科技 书 的 本 数 比 文艺 书 少 (1/5) ， 把 多少 看作 单位 “ 1 ” ， 科技 书 的 本 数 是 文艺 书 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9720", "content": "甲乙 两地 相距 200 千米 ， 一辆 汽车 从 甲地 到 乙地 ， 8 时 刚好 行 全程 的 (4/7) ， 照 这样 的 速度 ， 行 完全 程 还 需要 几时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8202", "content": "一 只 手 有 5 根 手指 ， 2 个人 有 多少 根 手指 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7815", "content": "小 明 计划 到 风景区 旅游 ， 如果 他 坐 汽车 以 40 千米 / 小时 的 速度 行驶 ， 那么 比 骑车去 早 到 3 小时 ， 如果 他 以 8 千米 / 小时 的 速度 步行 去 ， 那么 比 骑车 晚 到 5 小时 ， 小 东 的 出发点 到 周口店 有 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2358", "content": "五年级 同学 收集 了 165 个 易拉罐 ， 六年级 同学 比 五年级 多 收集 了 (1/5) ． 六年级 收集 了 多少 个 易拉罐 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13639", "content": "一 块 平行四边形 的 地 ， 面积 是 54 m ^ 2 ， 已知 它 的 底 长 9 m ， 高 = 多少 m ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16395", "content": "同学 们 去 春游 ， 三年级 去 了 60 人 ， 六年级 去 的 人数 是 三年级 的 2 倍 ， 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "358", "content": "菜 站 有 一批 白菜 ， 第一天 卖出 了 40% ， 第 二 天 卖出 了 90 千克 ， 这时 卖 了 的 与 没 卖出 的 比 是 5 ： 3 ， 这 批 白菜 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5177", "content": "5 一班 有 45 人 参加 植树 ， 按计划 平均 每人 要 植树 8 棵 ． 实际 植树 时 有 5 人 没有 来 ， 其他人 仍 完成 计划 ． 这样 实际 每人 植树 多少 棵 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20349", "content": "学校 组织 体育比赛 ， 二年级 有 95 人 参加 ， 五年级 参加 的 人数 是 二年级 的 3 倍 ， 两个 年级 共有 多少 人 参加 比赛 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22660", "content": "一 个 长方形 的 长 2 厘米 ， 宽 1.5 厘米 ， 周长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16520", "content": "甲 数 比 乙 数多 (1/3) ， 则 乙 数 比 甲 数 少 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22476", "content": "果园 里 有 梨树 120 棵 ， 桃树 比 梨树 多 30% ． 果园 里 有 桃树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8682", "content": "除数 是 5 ， 商 是 170 ， 余数 是 3 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16135", "content": "修路 队 修 一条 公路 ， 第一周 修 了 全长 的 (2/5) ， 第 二 周 与 第一周 修 得 同样 多 ． 还 剩 几分 之 几 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5197", "content": "一 辆 汽车 从 武汉 开往 长沙市 ， 每 小时 行驶 32 千米 ， 6 小时 到达 ． 如果 另外 一辆 汽车 从 武汉 开往 长沙 ， 只 需 4 小时 ， 那么 另外 一辆 汽车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14229", "content": "参加考试 的 一年级 学生 有 20 名 ， 二年级 学生 有 30 名 ， 其中 一年级 学生 的 平均 分为 70 分 ， 二年级 学生 的 平均 分为 80 分 ． 两个 年级 合在一起 的 总 平均 分为 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9335", "content": "为了 让 贫困地区 的 孩子 学到 更 多 的 知识 ， 学校 举行 了 一次 “ 捐书 献爱心 活动 ” ， 五年级 同学 捐书 200 本 ， 六年级 捐 的 书 比 五年级 少 5% ， 六年级 同学 捐书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "876", "content": "小 刚 和 小 明 进行 100 米 短跑 比赛 （ 假定 二 人 的 速度 均 不变 ） ． 当 小 刚跑 了 90 米 时 ， 小 明 距 终点 还有 25 米 ， 那么 ， 当 小 刚 到达 终点 时 ， 小 明 距离 终点 还有 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16242", "content": "甲 数 是 9.5 ， 比 乙 数 的 40% 少 2.5 ， 求 乙 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20994", "content": "《 电工 手册 》 每 本 80 元 ， 可是 小 明 的 钱 只有 这 本书 价钱 的 (4/5) ， 他 再有 多少 元 钱 就 能 买 这 本书 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20601", "content": "大青山 林场 今年 计划 植树 800 棵 ． 已经 栽 了 3 天 ， 每天 载 了 140 棵 ， 剩下 的 打算 用 2 天 时间 栽 完 ． 平均 每天 要 栽 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10370", "content": "某 商品 因 滞销 而 降价 (1/10) ， 后来 开拓 了 市场 转为 畅销 ， 要 恢复 原价 应 提价 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12984", "content": "奶奶家 喂 有 母鸡 46 只 ， 公鸡 17 只 ， 每 9 只 鸡 装 一 笼 ， 可以 装 几笼 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13700", "content": "一 个人 以 相同 的 速度 在 小 路上 散步 ， 从 第 1 棵 树 走 到 第 13 棵 树 用 了 18 分 ， 如果 这个 人 走 了 24 分 ， 应 走 到 第 几棵 树 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5733", "content": "同学 们 做操 ， 男生 站 5 行 ， 每行 26 人 ， 女生 的 人数 是 男生 人数 的 2 倍 ， 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6301", "content": "一 本 课外读物 ， 小 红 看 了 35 页 ， 正好 是 剩下 的 (5/7) ， 这本 课外读物 一共 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4991", "content": "一 个数 比 32 的 3 倍 少 19 ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17561", "content": "小 明 在 行驶 的 火车 里 看 铁路 两旁 的 电线杆 ， 他 发现 从 经过 第一根 电线杆 到 第 45 根 ， 恰好 是 4 分钟 ， 已知 每 两根 电线杆 之间 的 距离 是 50 米 ， 火车 行驶 的 速度 是 每分钟 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14233", "content": "小 东家 离 学校 3 千米 ， 小 芹 家 离 学校 2 千米 ， 他们 的 家 相距 最近 = 多少 千米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11151", "content": "一 本书 有 180 页 ， 第一天 读 了 全书 的 (2/5) ， 第 二 天 应从 多少 页 开始 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7510", "content": "王 叔叔 购买 了 2000 元 的 国家 建设 债券 ， 定期 3 年 ． 如果 年利率 是 3.60% ， 到期 可 取回 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22279", "content": "用 0 ， 1 ， 2 ， 3 ， 4 ， 5 ， 6 ， 7 ， 8 ， 9 10 个 数字 ， 能够 组成 多少 个 没有 重复 数字 的 11 位数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "195", "content": "李老师 要 打 一篇 有 2300 字 ， 已经 打 了 1700 个 ， 剩下 的 如果 要 在 4 分钟 里 完成 ， 平均 每分钟 要 打 多少 个 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3397", "content": "6 （ 1 ） 班 男生 和 女生 人数 的 比 是 5 ： 4 ， 男生 比 女生 多 6 人 ， 这个 班 一共 有 多少 学生 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "20067", "content": "一 辆 自行车 车轮 外 直径 为 0.6 米 ， 小 华 骑 自行车 从 家 到 学校 ， 如果 每分钟 转为 100 周 ， 他 从 家 到 学校 出发 10 分钟 到达 学校 ， 小 华 家 距 学校 多少 米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "20825", "content": "李 明 收集 邮票 42 枚 ， 王 红 收集 的 邮票 比 李 明 多 (2/7) ． 王 红 收集 邮票 多少 枚 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7335", "content": "明明 的 爸爸 每月 工资 1800 元 ， 按规定 ， 工资 超过 800 元 的 部分 按 5% 缴纳 个人所得税 ， 明明 的 爸爸 每月 实 得 工资 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "971", "content": "阳光 商厦 有 一种 皮鞋 原来 每 双 定价 为 260 元 ， 现在 做 打 0.9 销售 ． 这种 鞋 现在 比 原来 便宜 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5590", "content": "某 商场 将 一种 商品 按 进价 的 50% 加价 后 定价 为 390 元 ， 这种 商品 的 进价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2121", "content": "学校 买 了 3 盒 钢笔 ， 每盒 10 支 ， 一 共用 了 360 元 ． 平均 每支 钢笔 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2991", "content": "衬衫厂 过去 4 天 生产 衬衫 640 件 ， 现在 每天 生产 350 件 ， 现在 比 过去 每天 多 生产 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5944", "content": "一 台 录音机 现在 售价 180 元 ， 比 原价 降低 了 10% ， 录音机 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4911", "content": "学校 图书馆 里 故事 书本 数 的 30% 正好 等于 文艺 书 的 (3/4) ， 已知 故事书 有 360 本 ， 文艺 书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18797", "content": "一 个数 的 (2/3) 是 12 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12933", "content": "学校 用 880 元 买 了 23 个 足球 ， 还 余 6 元 ， 每个 足球 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15237", "content": "明明 看 一本 450 页 的 故事书 ， 已经 看 了 6 天 ， 每天 看 55 页 ． 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21796", "content": "前进 镇 去年 水稻 总产量 是 2400 吨 ， 比 小麦 总产量 多 20% ， 小麦 总产量 = 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13307", "content": "环保 行 中 ， 五年级 清运 垃圾 (3/5) 吨 ， 比 六年级 少 清运 (1/8) 吨 ． 六年级 清运 垃圾 多少 吨 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20471", "content": "图书室 有 科技 书 720 本 ， 连环画 的 本 数 是 科技 书 的 (2/3) ， 故事书 的 本 数 是 连环画 的 (8/5) ， 故事书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7925", "content": "3 辆 汽车 3.5 小时 运 水果 2100 箱 ， 平均 每辆 汽车 每 小时 运 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16370", "content": "一 个数 的 32 倍 是 2080 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22988", "content": "一 桶 油 连 桶 共 重 54 千克 ， 倒 出 油 的 (5/8) 后 ， 剩下 的 油 连 桶 重 24 千克 ， 油桶 盛 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "186", "content": "把 一根 1 米 长 的 铁丝 剪成 3 段 ， 第一段 长 (3/8) 米 ， 第 二 段 与 第一段 同样 长 ． 剩下 的 一段 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21742", "content": "309 / 41.2 与 (3/4) 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18486", "content": "工程队 铺 一段 210 米 的 路面 ， 3 天 就 铺 了 90 米 ． 照 这样 计算 ， 铺 这 条 路 一共 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11981", "content": "阳光 小学 开展 为 灾区 捐款 活动 ． 四年级 有 4 个 班 ， 每班 45 名 学生 ， 共 捐款 900 元 ， 平均 每个 学生 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7768", "content": "学校 图书室 里 有 2800 本 故事书 ， 平均 借给 10 个 班 后 ， 还 剩 400 本 ， 平均 每班 借 了 多少 本 故事书 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16979", "content": "王 钢 把 10000 元 人民币 存入 银行 ， 定期 3 年 ， 年利率 是 2.7% ． 到期 时 ， 王 钢 应得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21383", "content": "4 季 鲜 果品 店 运 来 14 筐 梨 ， 每 筐 65 千克 ， 还 运 来 16 筐 苹果 ， 每 筐 58 千克 ． 运 来 的 梨 和 苹果 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9922", "content": "水果店 有 625 千克 水果 ， 上午 卖出 176 千克 ， 下午 卖出 235 千克 ． 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6303", "content": "甲 数 是 35 ， 乙 数 比 甲 数 的 3 倍 还 多 25 ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16191", "content": "体育 队 有 男生 24 人 ， 比 女生 多 16 人 ， 男生 的 人数 是 女生 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16119", "content": "有 积木 240 块 ， 黄色 占 (1/5) ， 红色 占 (1/4) ， 红色 积木 比 黄色 积木 多 多少 块 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "958", "content": "某 专业户 收 一批 梨 ， 每 筐 装 30 千克 ， 要 70 个 筐 ， 如果 每 筐 多 装 5 千克 ， 则 需要 多少 个 筐 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6431", "content": "王大妈 家养 了 24 只 鸭 ， 养鸡 的 只 数 比 鸭 的 4 倍 少 17 只 ， 王大妈 家 养鸡 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3793", "content": "一 件 上衣 ， 0.6 出售 时 每件 72 元 ， 若 是 0.8 出售 ， 每件 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7871", "content": "一 根 绳子 ， 剪 去 70% 后 ， 还 剩下 12 米 ， 如果 剪 去 60% ， 则 剩下 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18567", "content": "一 条 公路 ， 已经 修好 了 304.6 千米 ， 比 没 修好 的 多 123.65 千米 ， 这 条 公路 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8988", "content": "买 5 个 相同 的 篮球 ， 付出 500 元 ， 找回 45 元 ． 每个 篮球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6314", "content": "水果店 运 来 140 千克 梨 ， 运走 4 箱 ， 每箱 23 千克 ． 还 剩 多少 千克 梨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22164", "content": "一 袋 面粉 吃 了 23 千克 ， 还 剩 27 千克 ． 还 剩 这 袋 面粉 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13995", "content": "5.38 + 9.36 与 3.72 的 差 ， 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15777", "content": "一 个 粮仓 第一天 运出 粮食 的 (1/5) ， 第 二 天 比 第一天 多 运出 20 吨 ， 运出 的 与 剩下 的 比 为 11 ： 14 ， 这个 粮仓 共有 粮食 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7587", "content": "爸爸 身高 是 177 厘米 ， 小 红 的 身高 是 爸爸 的 (2/3) ， 小 红 身高 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16786", "content": "一 个数 的 (2/5) 是 24 ， 这个 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14824", "content": "小 红 为 100 棵 花 浇水 ， 已经 浇 了 28 棵 ， 剩下 的 每分钟 浇 6 棵 ， 还 需要 几分钟 才能 浇 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15306", "content": "某 机关 现有 45 人 ， 比 原来 精简 了 5 人 ， 精简 了 多少 % ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16622", "content": "甲 、 乙 两辆 列车 同时 从 宁波 、 上海 相对 开出 ， 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 55 千米 ， 经过 4 小时 相遇 ， 宁波 至 上海 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7902", "content": "把 一块 木料 平均 锯 成 6 段 ， 如果 每 锯 一段 所用 的 时间 相同 ， 每 锯 一段 所用 的 时间 占 全部 时间 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10673", "content": "一 座 楼房 每 上 一层 要 走 16 个 台阶 ， 到 小 英 家 要 走 64 个 台阶 ， 他 家住 多少 楼 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17188", "content": "(1/25) 米 的 绳子 ， 用 去 (1/2) 后 再 用 去 多少 米 ， 剩 (1/1000) 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18402", "content": "同学 们 向 灾区 捐款 ， 第一次 捐款 4000 元 ， 第 二 次 捐款 4500 元 ， 捐款 数额 上升 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16755", "content": "一 箱 橘子 卖 了 (1/5) ， 正好 是 6 千克 ， 这 箱 橘子 原来 有 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14463", "content": "0.36 / 18 = 0.02 ， 如果 把 被除数 扩大 到 原来 的 100 倍 ， 但 除数 大小 不变 ， 商 应 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6716", "content": "某 单位 工作人员 ， 精减 3 人 后 ， 还有 27 人 ， 精减 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "279", "content": "(4/5) 米 的 (3/4) 比 10 米 少 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13940", "content": "某县 去年 造林 1260 公顷 ， 超过 原 计划 (1/5) ． 原 计划 造林 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5217", "content": "一 件 工作 ， 甲 单独 完成 需要 8 天 ， 乙 单独 完成 需要 12 天 ， 两 人 合 做 一段时间 ， 完成 了 这件 工作 的 (2/3) ， 两 人 一共 合作 了 几天 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1154", "content": "白塔村 计划 修 一条 水渠 ， 如果 每天 修 16 米 ， 18 天 就 能 修 完 ． 第一天 修 了 24 米 ， 照 第一天 的 进度 ， 几天 能 修 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11282", "content": "从 a 地 去 b 地 ， 货车 需要 90 分钟 ， 客车 需要 80 分钟 ． 货车 每分钟 行 (5/3) 千米 ， 客车 每分钟 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8735", "content": "一 辆 汽车 5 h 行驶 了 265 km ， 照 这样 的 速度 从 甲地 到 乙地 一共 行驶 了 7 h ， 甲地 到 乙地 有 多少 km ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20034", "content": "水果店 有 7250 千克 苹果 ， 4000 千克 桔子 ， 如果 每 50 千克 装 1 袋 ， 那么 苹果 比 桔子 多 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4772", "content": "一 堆 煤 有 (5/6) 吨 ， 用 去 (1/3) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9283", "content": "找 规律 填 数 ： 1 ， 3 ， 6 ， 9 ， 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15313", "content": "商店 以 每枝 10 元 的 价格 购进 一批 钢笔 ， 加上 40% 的 利润 以后 定价 出售 ， 当 卖出 这 批 钢笔 的 (3/4) 时 就 已经 获利 240 元 ． 这 批 钢笔 共有 多少 枝 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15849", "content": "强强 用 100 元 钱 买 了 4 件 同样 的 汗衫 ， 还 剩 12 元 钱 ， 这样 的 汗衫 每件 多少 元 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10623", "content": "0.9 与 (3/5) 的 差 加上 1 / 1.25 的 商 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8018", "content": "田径队 共有 学生 220 人 ， 其中 男生 人数 是 女生 人数 的 (5/6) ， 男生 有 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21665", "content": "新华书店 运 来 540 本 《 白雪公主 》 ， 卖 了 7 天 ， 还 剩 120 本 ． 平均 每天 卖 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4846", "content": "阴雨天 ， 小 娟 看见 远处 的 闪电 以后 ， 经过 6 秒 才 听见 雷声 ． 如果 声音 在 空气 中 的 传播速度 是 每秒 0.34 千米 ， 那么 小 娟 离 闪电 的 地方 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10595", "content": "一 份 稿件 210 页 ， 由 两台 打印机 同时 打印 ， 第一台 每分钟 打 5 页 ， 第 二 台 每分钟 打 9 页 ， 几分钟 可 打印 完 这份 稿件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15351", "content": "妈妈 在 超市 买 了 6 千克 青苹果 ， 付出 50 元 ， 找回 21.2 元 ， 每千克 青苹果 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8072", "content": "新建 一栋 教学楼 ， 原 计划 投资 30 万元 ， 实际 节约 了 (1/6) ． 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13581", "content": "把 一个 圆锥体 浸没 在 底 面积 是 30 平方厘米 的 圆柱形 盛 有 水 的 容器 里 ， 水面 升高 4 厘米 ， 这个 圆锥体 的 体积 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14471", "content": "甲 车 每 小时 行 32 千米 ， 乙 车 每 小时 行 34 千米 ， 两车 同时 从 两地 相对 开出 ， 经过 3 小时 相遇 ． 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21463", "content": "家具厂 订购 400 根 方木 ， 每 根 方木 横截面 的 面积 是 0.24 m ^ 2 ， 长 是 4 m ， 这些 木料 一共 = 多少 方 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23096", "content": "小 明 看 一本 120 页 的 故事书 ， 第一天 读 了 全书 的 (1/10) ， 第 二 天 读 了 全书 的 (1/6) ， 第 3 天 应从 第 多少 页 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13331", "content": "百货大楼 1 月份 的 营业额 是 248 万元 ， 如果 按 5% 的 税率 纳税 ， 那么 税后 的 条 额 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22374", "content": "小 芳 带 100 元 去 商店 买 东西 ， 买 一副 52 元 的 乒乓球拍 ． 剩下 的 钱 正好 可以 买 8 个 乒乓球 ， 每个 乒乓球 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19852", "content": "一 个数 的 (5/6) 是 (10/3) ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12185", "content": "某 建筑工地 运 来 一批 水泥 ， 砌墙 用 去 了 (5/7) 吨 ， 抹 地 用 去 了 (7/8) 吨 ， 还 剩 (5/6) 吨 ， 这 批 水泥 共有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15524", "content": "两个 工程队 合 修 了 一段 长 156 km 的 高速公路 ， 100 天 正好 完工 ． 甲队 每天 修 0.76 km ， 乙 队 每天 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14302", "content": "甲乙 两地 相距 15 千米 ， 一辆 汽车 已经 行 了 全程 的 (2/5) ， 这辆 汽车 已经 行使 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15466", "content": "修 一条 公路 ， 4 天 修 了 全长 的 (4/5) ， 平均 每天 修 全长 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22859", "content": "育才 小学 有 360 名 学生 ， 其中 有 5% 的 学生 没有 参加 兴趣 活动 小组 ， 参加 兴趣 活动 小组 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7823", "content": "一 桶 酒精 ， 第一次 倒 出 它 的 (1/3) ， 第 二 次 倒 出 它 的 25% ， 两次 正好 倒 出 酒精 14 千克 ， 这 桶 酒精 原来 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22018", "content": "一 个 三角形 ， 两条 直角 边 都 是 4 厘米 ， 这个 三角形 的 面积 = 多少 厘米 ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "996", "content": "六年级 有 学生 560 人 ， 其中 会 打乒乓球 的 人数 占 了 其中 的 (3/8) ， 会 吹 口琴 的 人数 是 会 打乒乓球 的 人数 的 (1/7) ， 有 多少 人 会 吹 口琴 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11192", "content": "小 峰 要 将 96 张 照片 整理 在 相册 中 ， 平均 每页 放 8 张 ， 可以 放 几页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13081", "content": "一 个数 的 30 倍 是 240 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20563", "content": "一 个数 的 (5/2) 倍 比 120 的 (5/8) 少 12 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5948", "content": "同学 们 给 希望 小学 献爱心 ， 三年级 捐书 373 本 ， 四年级 捐书 的 本 数 比 三年级 的 3 倍 少 34 本 ． 四年级 捐书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17472", "content": "甲 、 乙 两地 相距 210 千米 ． 两辆 汽车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 1.5 小时 后 两车 相遇 ． 已知 一辆 汽车 每 小时 行 65 千米 ， 另 一辆 每 小时 行 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5727", "content": "一 列 火车 长 245 米 ， 每秒 行驶 25 米 ， 全 车 要 通过 一座 930 米 的 隧道 ． 需要 多少 秒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10593", "content": "某 玩具厂 把 630 件 玩具 分别 装入 5 个 塑料袋 和 6 个 纸袋 里 ， 一个 塑料袋 与 3 个 纸袋 装 的 玩具 同样 多 ． 每个 纸袋 装 多少 件 玩具 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2343", "content": "晓 晓 把 160 元 零用钱 存入 银行 ， 打算 到 明年 这个 时候 用 本金 和 利息 给 妈妈 买 一件 礼物 ， 如果 年利率 是 3.5% ， 请 你 计算 他 最 多 能 买 多少 钱 的 礼物 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1175", "content": "水果店 运 来 苹果 36 箱 ， 每箱 15 千克 ． 苹果 一共 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13091", "content": "刘 伯伯 开 汽车 从 a 城 去 b 城 ． 平均 每 小时 行驶 65.5 千米 ， 1.6 小时 后 距 b 城 还有 36.5 千米 ， 求 a 、 b 两城 之间 的 距离 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5719", "content": "656 被 29 与 12 的 和 除 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10250", "content": "一 根 旗杆 长 12 米 ， 其中 埋入 土 中 的 长度 是 1.5 米 ， 露出 地面 的 部分 是 全长 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7660", "content": "一 盒 牛奶 有 (2/5) 升 ， 正好 倒 满 3 大 杯 ． 平均 每杯 牛奶 有 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2614", "content": "一 件 毛衣 的 原价 是 85 元 ， 现价 是 68 元 ． 现价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18335", "content": "某 粮店 上周 卖出 面粉 30 吨 ， 比 大米 多 (1/5) ， 粮店 上周 卖出 大米 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9827", "content": "张老师 收集 了 一些 图片 ， 其中 名山 图片 占 45% ， 河流 图片 占 15% ， 名山 图片 比 河流 图片 多 60 张 ， 张老师 共 收集 了 多少 张 图片 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13008", "content": "停车场 上 停 有 84 辆车 ． 早晨 开走 了 30 辆 ， 又 开 进来 了 8 辆 ， 这时 停车场 上 还有 多少 辆车 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7772", "content": "篮球场 的 长 是 28 米 ， 宽 是 15 米 ， 它 的 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20874", "content": "某 化肥厂 十 月份 生产 化肥 180 吨 ， 比 原 计划 超产 20 吨 ， 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8970", "content": "王 叔叔 上 月 的 工资总额 为 5180 元 ， 按照 规定 超过 3500 元 的 部分 要 缴纳 5% 的 个人所得税 ， 王 叔叔 上个月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17302", "content": "张 兰 从 家 到 学校 要 用 25 分钟 ， 她 每分钟 走 74 米 ， 她家 到 学校 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22797", "content": "王老师 家 离 学校 很 远 ， 每天 乘 公交车 上班 很 不 方便 ， 她 打算 分期付款 买车 ． 她 选中 的 别克 轿车 现价 是 15 万元 ， 按规定 她 得 首付 (3/10) ， 余下 部分 可 向 银行贷款 ． 王老师 要 贷款 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11342", "content": "有 一根 木料 ， 用 0.4 小时 截 成 5 段 ， 如果 每 截 一次 所用 的 时间 相同 ， 那么 要 截 7 段 ， 一共 需要 多少 小时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9294", "content": "二 （ 1 ） 班 有 26 名 男同学 ， 22 名 女同学 ， 每 6 名 同学 分成 一个 学习 小组 ， 全班 可以 分成 几个 学习 小组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12648", "content": "李老师 上班 ， 骑 自行车 每 小时 行 15 千米 ， 0.25 小时 可以 到达 学校 ． 如果 她 改为 步行 ， 每 小时 只能 走 5 千米 ， 那么 她 要 用 多少 小时 才能 到达 学校 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11252", "content": "书店 运 来 一批 新书 ， 第一周 卖出 了 总数 的 (1/4) ， 第 二 周 卖出 了 总数 的 (2/5) ， 两周 正好 卖出 1300 本 ， 这 批 新书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6943", "content": "一 个 商店 违反 物价政策 擅自 把 一种 商品 的 价格 提高 了 25% ， 物价部门 发现 后 ， 责令 其 恢复 原价 ， 他们 应该 把 现价 降低 多少 % ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19325", "content": "春华 和 秋 生 骑 摩托车 同时 从 同一 地点 向 相反 方向 行驶 ． 0.5 小时 后 相距 47.5 千米 ， 春华 每 小时 行驶 42.5 千米 ， 秋 生 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2927", "content": "一 段 公路 计划 12 天 修 720 米 ， 实际 每天 修 90 米 ， 实际 比 计划 少 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7610", "content": "妈妈 买 了 2 千克 苹果 和 3 千克 梨 ， 共用 去 30.5 元 ． 已知 梨 每千克 5.2 元 ， 苹果 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17771", "content": "小 刚 带 20 元 去 商店 买 了 一个 7.5 元 的 铅笔盒 ， 那么 售货员 阿姨 应该 找 多少 元 钱 给 小 刚 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "443", "content": "学校食堂 的 炊事员 向 总务主任 汇报 说 ： “ 我们 食堂 这个 月 用 去 32 吨 ， 比 上个月 少 用水 8 吨 ” 请问 这个 食堂 本月 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14819", "content": "甲 数 是 168 ， 乙 数 是 甲 数 的 4 倍 ， 乙 数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6759", "content": "甲 、 乙 、 丙 3 个数 的 比 是 2 ： 3 ： 5 ， 平均数 是 116 ， 则 丙 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21771", "content": "一 本书 360 页 ， 第一天 看 了 全书 的 40% ， 第 二 天 看 了 全书 的 25% ， 这时 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13257", "content": "一 个 三角形 的 面积 是 36 cm ^ 2 ， 与 这 它 等 底 等 高 的 平行四边形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2246", "content": "第 29 届 北京 奥运会 的 主会场 - 鸟巢 建筑面积 是 25.8 公顷 ， 比 天安门广场 建筑面积 小 18.2 公顷 ， 天安门广场 的 建筑面积 有 多 大 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6112", "content": "一 个 圆柱形 水桶 的 容积 是 50.24 升 ， 从 里面 量 底面 半径 是 2 分 米 ， 装 了 (3/4) 桶 的 水 ， 水面 高 几分 米 ？", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "10197", "content": "一 种 服装 0.75 后 是 150 元 ， 这种 服装 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5825", "content": "大峪 村 挖 一条 水渠 ， 每天 挖 (1/12) ， 挖 了 7 天 共 挖 了 42 米 ． 这 条 水渠 全长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11735", "content": "某人 从 甲地 到 乙地 ， 步行 0.5 小时 后 ， 又 坐 汽车 走 了 4 小时 ， 共 走 了 205.6 千米 ． 若 他 步行 每 小时 走 6 千米 ， 汽车 每 小时 走 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9543", "content": "两只 蚂蚁 ， 相距 175 cm ， 大 蚂蚁 每秒钟 爬行 4 cm ， 小蚂蚁 每秒钟 爬行 3 cm ， 经过 几秒钟 后 ， 两只 蚂蚁 会 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "785", "content": "一 本 故事书 有 124 页 ． 小 明 第一天 读 了 47 页 ， 第 二 天 读 了 53 页 ， 还 剩 多少 页 没 读 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13780", "content": "有 两袋 大米 ， 乙 袋 倒入 甲 袋 5.4 千克 后 ， 甲 袋 比 乙 袋 重 1.5 千克 ， 乙 袋 原来 重 25 千克 ， 甲 袋 原来 大米 重 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1330", "content": "化肥厂 生产 一种 农用 肥 ， 原 计划 每周 生产 化肥 120 吨 ， 需用 4 周 完成 任务 ， 结果 提前 1 周 完成 ， 实际 每周 生产 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2217", "content": "哥哥 有 100 元 钱 ， 弟弟 有 80 元 ， 哥哥 给 弟弟 多少 元 钱 后 兄弟两人 的 钱 数 比 是 7 ： 11 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4986", "content": "买 一件 衣服 要 25.5 元 ， 买 一条 裤子 的 价钱 比 它 少 2.5 元 ， 买 一套 需要 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11793", "content": "一 辆 洒水车 每 分 行驶 60 米 ， 洒水 的 宽度 是 8 米 ， 洒水车 直行 9 分 ， 被 洒水 的 地面 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16162", "content": "有 一桶 油 ， 第一次 取出 2.1 千克 ， 第 2 次 取出 余下 的 (1/4) ， 这时 桶 里 还有 7.5 千克 ， 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22554", "content": "商店 里 原有 蓝 书包 41 个 ， 又 购进 绿 书包 30 个 ． 今天 共 卖出 书包 39 个 ， 现在 商店 还 剩 多少 个 书包 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12557", "content": "5.45 * 24 * 0.2 - 3.45 * 4.8 = ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18317", "content": "“ 5 一 ” 活动 期间 海尔 牌 空调 售价 2000 元 ， 比 原价 优惠 了 500 元 ， 优惠 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4392", "content": "有 黑白 棋子 一堆 ， 其中 黑子 的 个数 是 白子 个数 的 2 倍 ， 如果 从 这 堆 棋子 中 每次 同时 取出 黑子 4 个 ， 白子 3 个 ， 那么 取出 多少 次 后 ， 白子 余 1 个 ， 而 黑子 余 18 个 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7792", "content": "一 架 钢琴 售价 8500 元 ， 比 原来 价格 降低 了 15% ， 原来 一架 钢琴 的 价格 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17187", "content": "杨 大伯 的 鸡场 里 有 公鸡 79 只 ， 母鸡 比 公鸡 多 32 只 ， 鸡场 一共 有 鸡 多少 只 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16669", "content": "一 本书 有 120 页 ， 小 红 每天 看 18 页 ， 他 看 了 5 天 ， 第 6 天 应从 第 多少 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22931", "content": "一 张 桌子 比 一把 椅子 贵 20.7 元 ， 每 把 椅子 的 价钱 是 每张 桌子 价钱 的 (5/8) ， 每 把 椅子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9555", "content": "一 辆 汽车 0.2 小时 行 6 千米 ， 照 这样 计算 ， 1.8 小时 行 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8705", "content": "同学 们 回收 废旧电池 ， 三年级 回收 了 308 节 ， 比 二年级 多 回收 76 节 ， 两个 年级 共 回收 了 多少 节 废旧电池 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13218", "content": "一 个 平行四边形 的 底 是 18 分 米 ， 面积 是 72 平方分米 ， 它 的 高 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21615", "content": "王明 今年 的 身高 是 147 cm ， 比 去年 高 了 7 cm ， 王明 的 身高 比 去年 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18337", "content": "水果店 有 96 筐 苹果 ， 上午 卖出 28 筐 后 ， 下午 又 运进 30 筐 ． 现在 水果店 有 多少 筐 苹果 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22897", "content": "甲 数 是 乙 数 的 一半 ， 丙 数 是 乙 数 的 2 倍 ， 丙 数 是 甲 数 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20889", "content": "苹果树 比 梨树 少 (3/8) ， 梨树 比 苹果树 多 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21759", "content": "解放军 某 连队 进行 野营拉练 ， 第一次 行 了 3 小时 ， 平均 每 小时 行军 14 千米 ； 第 二 次 用 了 同样 的 时间 ， 共 行 了 30 千米 ． 这个 连队 两次 拉练 平均 每 小时 行军 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18868", "content": "修 一条 (4/5) 千米 的 水沟 ， 已经 修 了 全长 的 (3/4) ， 还 剩 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2137", "content": "从 番禺 莲花 港 到 香港 中港城 码头 的 路程 为 60 海里 ， 一艘 客轮 去 时 的 速度 是 30 海里 / 时 ， 沿 原 路 返回 时 ， 由于 刮起 了 大风 ， 速度 是 20 海里 / 时 ． 返回 时 比 去 时 多用 了 多少 时间 ？ （ 说明 ： 海里 是 航海 上 度量 距离 的 单位 ． ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1748", "content": "某 商品房 原来 售价 110 万元 ， 国家 对 房价 实行 调控 后 ， 现在 售价 比 原来 降低 了 (2/11) ． 该 商品房 现价 = 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6871", "content": "一 张 长方形 纸片 长 8 厘米 ， 宽 6 厘米 ， 把 它 剪成 一个 最大 的 正方形 ， 剪 去 部分 的 面积 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21021", "content": "张 钦 乘车 从 甲地 到 乙地 5 小时 行驶 了 310 千米 ， 照 这样 的 速度 ， 张 钦 12 小时 可以 到达 乙地 ． 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21028", "content": "学校 买 了 12 个 足球 和 16 个 篮球 一 共用 了 1960 元 ． 足球 的 单价 是 90 元 ， 篮球 的 单价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17527", "content": "学校 合唱队 的 人数 比 舞蹈队 多 (2/7) ， 舞蹈队 人数 比 合唱队 少 18 人 ． 舞蹈队 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4230", "content": "果园 里 有 梨树 144 棵 ， 苹果树 比 梨树 多 (2/3) ． 苹果树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7447", "content": "医院 里 经常 要 给 病人 输入 葡萄糖 水 ， 这种 葡萄糖 水 是 把 葡萄糖 和 水 按 1 ： 19 配制 的 ， 根据 这些 信息 ， 你 能 知道 什么 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22440", "content": "小 华 看 一本 96 页 的 故事书 ， 看 了 25% 一共 看 了 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15833", "content": "一 本书 定价 75 元 ， 售出 后 可 获利 50% ， 这 本书 的 成本 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1650", "content": "甲 、 乙 两列 火车 分别 从 滨海 和 阳城 同时 相对 开出 ， 12 小时 后 相遇 ． 一直 甲 车 每 小时 行 108 千米 ， 乙 车 每 小时 行 96 千米 ． 两地 之间 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21912", "content": "新村 菜园 ， 摘 西红柿 550 千克 ， 比 摘 的 豆角 的 重 的 5 倍 少 50 千克 ． 摘 豆角 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17098", "content": "把 一根 木料 锯 成 4 段 要 6 分钟 ， 锯 成 7 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16014", "content": "商店 运 来 桃 和 苹果 ， 桃 和 苹果 的 重量 比 是 5 ： 7 ， 那么 苹果 重量 占 这 两种 水果 总量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15017", "content": "一 条 隧道 ， 甲队 每天 修 85 米 ， 乙 队 每天 修 110 米 ， 两队 合作 18 天 能 修 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19293", "content": "甲乙 两 人 同时 从 东村 到 西村 ， 甲 每分钟 行 120 米 ， 乙 每分钟 行 100 米 ， 结果 甲 比 乙 早 5 分钟 到达 西村 ． 东村 到 西村 的 路程 = 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9327", "content": "园艺场 里 银杏树 的 棵 数 是 柳树 的 (5/8) ， 是 广玉兰 棵 数 的 (5/4) ， 柳树 有 160 棵 ， 园艺场 里 有 广玉兰 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7615", "content": "为民 农机厂 装配 一台 农机 ， 原来 要 用 4.8 小时 ， 改进 技术 后 ， 只用 3 小时 就 可以 完成 ， 原来 装配 120 台 农机 的 时间 ， 现在 可以 装配 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14562", "content": "小 明 带 了 8.5 元 钱 去 买 学习用品 ． 他 买 了 一个 笔记本 2.6 元 ， 一副 3 角 板 3.4 元 ， 小 明 还 剩 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7261", "content": "一 只 篮球 56.6 元 ， 一只 足球 24.8 元 ， 学校 张老师 带 了 400 元 ， 先买 了 4 只 篮球 ， 剩下 的 钱 买 足球 ， 还 能 买 多少 只 足球 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12270", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行驶 了 全程 的 (3/8) ， 正好 行驶 了 102 千米 ． 甲 、 乙 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11786", "content": "新建 一座 工厂 ， 计划 投资 200 万元 ， 实际 只 投资 175 万元 ． 实际 投资 是 计划 投资 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20227", "content": "一 袋 大米 ， 乙 袋 倒入 甲 袋 5.4 千克 后 ， 甲 袋 比 乙 袋 重 1.5 千克 ， 乙 袋 原来 重 25 千克 ， 甲 袋 原来 大米 重 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9549", "content": "某 工程队 抢修 一段 铁路 ， 第一队 修 了 25% ， 第 二 队 修 了 210 米 ， 两队 修 的 刚好 是 全长 的 40% ． 这 段 铁路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8673", "content": "师徒 加工 一种 零件 的 工作效率 比 是 5 ： 3 ， 早上 同时 开工 ， 收工 时 共 加工 了 480 个 ， 师傅 比 徒弟 多 加工 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "3198", "content": "配制 一种 农药 ， 药液 和 水 的 比 是 1 ： 50 ， 配制 农药 1020 克 ， 需要 药液 多少 克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4481", "content": "如果 每班 每天 节约用水 50 千克 ， 照 这样 计算 ， 西林 校区 14 个 班 ， 9 月份 （ 按 22 天 计算 ） 一共 能 节约 多少 千克 水 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6316", "content": "妈妈 买来 20 千克 橘子 和 9 千克 梨 ， 买来 的 桃子 和 梨 同样 多 ， 妈妈 买来 的 水果 一共 有 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3215", "content": "67 + 54 + 33 + 46 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "178", "content": "某 数 的 40% 是 8 ， 这个 数 的 25% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15736", "content": "小张 叔叔 5 月份 的 工资 是 1450 元 ， 另外 奖金 是 900 元 ． 工资 和 奖金 的 总和 扣除 2000 元 后 ， 所剩 部分 按 个人所得税 5% 缴税 ． 你 能 帮 小张 叔叔 算算 他 应 缴纳 多少 元 税 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17251", "content": "一 块 平行四边形 的 钢板 ， 底 是 15 米 ， 高 是 8 米 ． 如果 这种 钢板 每平方米 重 35 千克 ， 这块 钢板 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "766", "content": "一 种 大豆 的 出油率 是 13.5% 至 15% ， 某 榨油厂 每天 需要 大豆 8.5 吨 ， 这个 厂 每天 的 最高 产油量 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2361", "content": "一 个 班 有 45 个 小学生 ， 统计 借 课外书 的 情况 是 ： 全班学生 都 借 有 语文 或 数学 课外书 ． 借 语文 课外书 的 有 39 人 ， 借 数学 课外书 的 有 32 人 ． 语文 、 数学 两种 课外书 都 借 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20709", "content": "一 块 长方体 石料 ， 长 10 分 米 ， 宽 3.5 分 米 ， 厚 2 分 米 ， 如果 每 立方分米 石料 重 4.5 千克 ， 这块 石料 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2812", "content": "某 公司 购进 300 台 联想 电脑 ， 卖出 一些 后 还 剩下 120 台 ， 卖 了 多少 台 联想 电脑 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4976", "content": "中华 服装厂 生产 儿童服装 数量 的 (3/5) 同 成人 服装 数量 的 (1/2) 相等 ， 儿童服装 生产 了 4500 套 ， 成人 服装 生产 了 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17356", "content": "一 种 电风扇 ， 原价 125 元 ， 现价 100 元 ， 降价 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5679", "content": "甲乙 两个 仓库 存放 着 同样 的 货物 ． 甲 仓库 存放 128 吨 ， 甲 仓库 再 运进 12 吨 ， 正好 是 乙 仓库 的 2 倍 ． 乙 仓库 存放 着 多少 吨 货物 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3972", "content": "副食店 运 来 400 千克 鸡蛋 ， 上午 卖出 全部 鸡蛋 的 (1/4) ， 下午 卖出 全部 鸡蛋 的 (1/5) ， 一共 卖 了 这些 鸡蛋 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16391", "content": "杨树 的 棵 数 是 槐树 棵 数 的 (4/5) ， 已知 杨树 有 16 棵 ， 槐树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11703", "content": "学校 准备 给 小学部 师生 发 笔记本 ， 发给 11 个 班 ， 每班 36 本 ， 还 需要 发给 老师 们 42 本 ． 学校 应 买 多少 本 笔记本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12077", "content": "预备 一班 41 人 共存 123.5 元 ， 预备 二 班 40 人 每人 存 4 元 ， 两班 平均 每人 存 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "349", "content": "有 浓度 为 3.2% 的 食盐水 500 克 ， 为了 把 它 变成 浓度 是 8% 的 食盐水 ， 需要 使 它 蒸发掉 多少 克 的 水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18546", "content": "一 本 软 面 抄 1.20 元 ， 一根 钢笔 5.60 元 ． 买 一本 软 面 抄 和 一枝 钢笔 一共 要 付 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5537", "content": "一 列 火车 上午 6 小时 行 了 366 千米 ， 下午 4 小时 行 了 276 千米 ． 下午 比 上午 平均 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10504", "content": "幼儿园 老师 买来 一包 糖 发给 小朋友 ， 35 个 小朋友 每人 领到 16 颗 糖 ． 还 剩下 10 颗 糖 ． 这 包 糖 一共 有 多少 颗 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4574", "content": "用 一根 长 30 分 米 的 钢材 做 零件 ， 每个 零件 用 钢材 (2/5) 分 米 ， 这根 钢材 可 做 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19943", "content": "一 条 路 全长 480 米 ， 第一天 修 了 这 条 路 的 (1/3) ， 第 二 天 修 了 这 条 路 的 (1/6) ， 还 剩 这 条 路 的 多少 没有 修 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11745", "content": "小 明 用 一张 纸 的 (3/8) 做 红花 ， 小 刚 用 这 张 纸 的 (2/8) 做 小旗 ， 两 人 一 共用 去 这 张 纸 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11624", "content": "一 件 家具 1500 元 ， 打 0.9 后 比 原来 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12888", "content": "学校 买 了 一根 长 27.5 米 的 绳子 ， 剪成 9 根 同样 长 的 跳绳 后 ， 还 剩 5 米 ， 平均 每 根 跳绳 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12915", "content": "(5/6) * (7/8) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1385", "content": "一 艘 轮船 从 甲 港 开往 乙 港 ， 去 时 顺水 ， 每 小时 32 千米 ， 15 小时 到达 ． 返回 时 逆水 ， 速度 降低 了 25% ， 多少 小时 返回 甲 港 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12703", "content": "在 春游 活动 中 ， 学校 安排 3 、 四年级 去 宝塔 公园 ． 三年级 共有 4 个 班 ， 每班 平均 有 34 人 ， 四年级 比 三年级 总 人数 的 2 倍 少 24 人 ， 四年级 去 了 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9302", "content": "甲 数 除以 乙 数 ， 商 是 3.6 ， 如果 把 乙 数 扩大 3 倍 ， 甲 数 不变 ， 那么 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10444", "content": "林场 栽 了 450 棵 松树 苗 ， 栽 了 270 棵 柏树 苗 ． 将 这些 树苗 栽 成 40 行 ， 平均 每行 栽 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9792", "content": "一 种 品牌 电视机 现价 3600 元 ， 比 原价 降低 了 20% ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11747", "content": "(2/5) / 4 的 商 ， 再 乘以 (3/4) ， 结果 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11834", "content": "电视机厂 5 月份 生产 电视机 2500 台 ， 比 原 计划 多 生产 500 台 ． 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1871", "content": "甲 数 是 32.8 ， 比 乙 数 的 4 倍 少 3.6 ， 求 乙 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15273", "content": "一 堆 沙 ， 运走 了 它 的 (1/5) ， 正好 是 运走 24 吨 ， 这 堆 沙 有 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10413", "content": "用 汽车 运 一批 货物 ， 第一次 运走 总数 的 (1/3) ， 第 二 次 运走 总数 的 (1/4) ， 第 3 次 运走 75 吨 ， 还 剩下 15 吨 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21235", "content": "3.2 与 1.7 的 差 乘以 4 ， 所得 的 积 去除 2.4 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16057", "content": "果园 里 有 桃树 32 棵 ， 梨树 是 桃树 的 2 倍 ， 苹果树 比 桃树 和 梨树 的 总数 多 54 棵 ． 果园 里 有 苹果树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9305", "content": "张 晨 向 老师 汇报 晨 检 情况 “ 今天 出勤率 为 92.5% ， 病假 2 人 ， 事假 1 人 ” ， 今天 出勤 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15863", "content": "六年级 参加 植树 活动 ， 种 活 了 92 课 ， 没 种 活 的 占 总 棵 数 的 8% ， 这次 活动 ， 六年级 种 了 多少 棵 树 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7688", "content": "一 瓶 牛奶 ， 小 红 喝 了 (7/8) ， 瓶 中 还有 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5855", "content": "在 计算 890 / （ 189 - 25 * 4 ） 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 最后 算 多少 法 ， 结果 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10469", "content": "54 里面 有 几个 9 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5446", "content": "156 + 78 * 1994 + 22 * 1996 = ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "10793", "content": "某 化肥厂 上个月 用 煤 160 吨 ， 这个 月 比 上个月 节约 了 30% ， 这个 月 实际 用 煤 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5042", "content": "多少 / 2 = 105 … 1 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11365", "content": "果园 里 种 了 6 行 苹果树 ， 每行 14 棵 ， 还 种 了 47 棵 桃树 ， 果园 里 一共 种 了 多少 棵 果树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15572", "content": "冬冬 的 家 到 学校 一共 有 3 千米 ． 这天 早上 ， 冬冬 上学 走 了 1 千米 后 发现 红领巾 没 戴 ， 连忙 回家 取 红领巾 再 去 上学 ． 这天 早上 ， 冬冬 上学 一共 走 了 多少 千米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9452", "content": "一 个 书柜 708 元 ， 一张 办公桌 比 书柜 贵 96 元 ， 买 一张 办公桌 要 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "339", "content": "实验 小学 为 庆祝 “ 建党 90 周年 ” 组建 舞蹈队 与 合唱队 ． 舞蹈队 有 24 人 ， 合唱队 的 人数 比 舞蹈队 的 11 倍 还 多 16 人 ， 合唱队 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2613", "content": "在 一幅 扇形 统计图 中 ， 桃树 的 棵 树 占 30% ， 图 上 扇形 的 面积 正好 是 3 平方厘米 ； 如果 橘树 的 棵 数 占 45% ， 那么 图 上 扇形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14065", "content": "书法 班 有 15 人 ， 绘画 班 的 人数 是 书法 班 的 6 倍 ， 绘画 班 的 人数 平均 分成 5 个 小组 ， 每个 小组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17064", "content": "100 米 比 多少 米 少 20% ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23053", "content": "某种 童装 的 批发价 是 每件 30 元 ， 零售价 是 每件 38 元 ， 王 叔叔 今天 赚 了 72 元 ， 王 叔叔 今天 卖 了 多少 件 童装 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5430", "content": "+50 表示 在 起点 的 东边 50 米处 ． 如果 小 佳 从 起点 先 向东走 280 米 后 再 向 西 走 350 米 ， 那么 小 佳 这时 的 位置 可以 表示 为 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14612", "content": "修 一条 水渠 ， 第一天 修 了 全长 的 (4/15) ， 第 二 天 比 第一天 多 修 全长 的 (2/15) ， 还 剩 几分 之 几 没有 修 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12027", "content": "把 一根 木头 锯 成 5 段 ， 每 锯 一次 要 2 分钟 ， 一共 要 锯 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "869", "content": "甲 数 是 60 ， 比 乙 数 少 20% ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "148", "content": "四年级 共有 13 个 合作 小组 ， 每个 小组 有 4 名 同学 ． 已知 全班同学 本学期 共 得到 312 颗 合作 星 ， 平均 每个 同学 得到 几颗 合作 星 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9392", "content": "学校 改建 操场 ， 实际 费用 是 26000 元 ， 比 计划 费用 超出 (1/12) ， 计划 改建 费用 = 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19270", "content": "385 * 204 的 积 减去 8765 ， 差 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19748", "content": "某班 有 学生 50 人 ， 会 游泳 的 占 全班 人数 的 72% ， 女生 25 人 中 有 (3/5) 会 游泳 ， 那么 男生 中 有 百分之几 会 游泳 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9721", "content": "同学 们 去 参观 军事博物馆 ， 上午 来 了 12 个 班 ， 每班 36 人 ， 把 这些 人 平均 分成 9 个 小组 ， 平均 每组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5914", "content": "果园 有 苹果树 245 棵 ， 桃树 的 棵 数 比 苹果树 的 3 倍 还 多 75 棵 ， 这 两种 树 共有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2456", "content": "水泥厂 原 计划 全年 生产 水泥 78.15 万吨 ， 结果 上半年 生产 54.32 万吨 ， 下半年 生产 47.86 万吨 ， 今年 生产 超过 计划 多少 万吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12943", "content": "小 亚 前 3 天 平均 每天 折 28 只 纸鹤 ， 后 2 天 共 折 73 只 纸鹤 ． 小巧 这 5 天 平均 每天 折 多少 只 纸鹤 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9902", "content": "张 阿姨 把 相同 数量 的 苹果 和 橘子 分给 若干名 小朋友 ， 每 名 小朋友 分 得 1 个 苹果 和 3 个 橘子 ． 最后 橘子 分 完 了 ， 苹果 还 剩下 12 个 ． 那么 一共 分给 了 多少 名 小朋友 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16382", "content": "一 根 绳子 长 5 米 ， 用 去 它 的 (2/5) 后 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5978", "content": "展销 时 一 本书 减价 25% ， 这 一新 的 价格 又 被 减少 了 40% ． 则 这 一 本书 的 实际 售价 是 原价 的 多少 ． （ 答案 写成 百分数 ）", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18913", "content": "学校 到 电影院 全长约 900 米 ， 小巧 用 30 分钟 走 完 ， 小胖 用 25 分钟 走 完 ， 小胖 平均 每分钟 比 小巧 多 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3218", "content": "用 13 去除 10.1 与 24.35 的 和 ， 所得 的 商 再 乘 0.6 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13092", "content": "星期天 ， 我 去 郊游 ． 前 2 小时 走 了 11 千米 ， 第 3 小时 走 了 4 千米 ． 平均 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16186", "content": "一 项 工程 甲 独 做 4 天 完成 ， 乙 独 做 12 天 完成 ． 甲乙 合作 多少 天 完成 这项 工程 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20836", "content": "一 块 长方形 菜地 长 (3/8) 米 ， 宽 (34/7) 米 ， 其中 (2/3) 种 白菜 ． 白菜 地 有 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2962", "content": "a 、 b 两地 相距 569 千米 ， 甲 、 乙 两车 同时 从 两地 相向 而 行 ， 甲 车 每 小时 行 61 千米 ， 乙 车 每 小时 行 65 千米 ， 甲 车 在 中途 修车 耽误 1 小时 后 ， 继续 行驶 与 乙 车 相遇 ， 从 出发 到 相遇 经过 几小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19572", "content": "从 a 城 到 b 城 有 960 千米 ， 一辆 客车 每 小时 行 60 千米 ， 一辆 轿车 每 小时 行 80 千米 ， 两车 同时 从 a 城 开往 b 城 ， 轿车 比 客车 提前 几小时 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4978", "content": "一 条 绳子 剪 去 6 米 正好 是 (1/3) ， 这根 绳子 长 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23067", "content": "北京西站 到 拉萨 的 火车 t27 次 每日 开行 ， 全程 4046 千米 ． 如果 进藏 火车 每 小时 行 75 千米 ， 要 行 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1403", "content": "有 一根 木料 ， 用 0.4 小时 截 成 5 段 ， 如果 每 截 一次 所用 的 时间 相同 ， 那么 要 截 10 段 ， 一共 需要 多少 小时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21988", "content": "张 叔叔 骑 自行车 过 一道 立交桥 ， 上 桥 速度 是 每 小时 8 千米 ， 下 桥 速度 是 每 小时 12 千米 ， 而且 上 桥 与 下 桥 所 经过 的 路程 相等 ， 中间 也 没有 停顿 ． 张 叔叔 骑车 过 这 座 桥 的 平均速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22640", "content": "从 甲地 到 乙地 ， 甲 每 小时 行 全程 的 (1/8) ， 乙 每 小时 行 全程 的 (1/7) ， 行 完全 程 乙 比 甲 少 用 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15317", "content": "98 - 9 / 81 商 ， 差 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14842", "content": "一 列 火车 挂 了 10 节车厢 ， 共有 1142 个 座位 ， 其中 9 节车厢 各 有 118 个 座位 ， 另 一 节车厢 有 多少 个 座位 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13910", "content": "某 工厂 9 月份 （ 30 天 ） 节约用水 720 吨 ， 平均 每天 节约用水 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1573", "content": "一 个 圆环 的 外 圆 半径 是 2 厘米 ， 内 圆 半径 是 1 厘米 ， 那么 圆环 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "-", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "12748", "content": "小 红 家住 在 一座 高 楼上 ， 她 上面 有 7 层 ， 下面 有 8 层 ， 小 红 家 的 楼房 一共 多少 层 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10125", "content": "把 5 枝 红 铅笔 和 3 枝 蓝 铅笔 放在 一个包 里 ， 让 你 每次 任意 摸 出 1 枝 ， 这样 摸 10000 次 ． 摸 到 蓝 铅笔 的 次数 大约 占 总 次数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13716", "content": "学校 买来 一批 图书 ， 其中 文艺 书 占 总数 的 (1/3) ， 科技 书 占 总数 的 25% ， 文艺 书 比 科技 书 多 20 本 ． 这 一批 图书 共有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17309", "content": "食堂 运 来 面粉 和 大米 各 3 袋 ． 面粉 每 袋 重 25 千克 ， 大米 每 袋 重 50 千克 ． 运 来 面粉 和 大米 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1852", "content": "我校 第 6 届 体育 文化节 快要 来到 了 ， 需要 准备 1500 张 运动员 的 号码 布 ， 现在 已经 有 (5/6) 的 号码 布 ， 还要 定做 多少 张 号码 布 才 够用 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4454", "content": "挖 一个 长 4 米 ， 宽 3 米 ， 深 2 米 的 地窖 ， 这个 地窖 占地 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9996", "content": "某班 有 36 个 同学 在 一项 测试 中 ， 答对 第一 题 的 有 25 人 ， 答对 第 二 题 的 人 有 23 人 ， 两 题 都 答对 的 有 15 人 ． 两 题 都 答 不 对 的 同学 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7132", "content": "一 套 《 大百科全书 》 ， 实行 0.85 优惠 后 ， 每套 425 元 ， 优惠 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "617", "content": "一 个 服装厂 今年 计划 生产 服装 8.19 万件 ， 是 去年 产量 的 1.3 倍 ， 去年 生产 服装 多少 万件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3666", "content": "22 的 32 倍 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "247", "content": "张 华 参加 1000 米 跑步 比赛 ， 每分钟 跑 320 米 ， 跑 了 3 分 ， 距离 终点 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2461", "content": "有 一筐 苹果 ， 卖出 (1/4) 后 ， 又 卖出 4 千克 ， 这时 还 剩 16 千克 ， 这 筐 苹果 原有 多少 千克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8697", "content": "欧 欧 用 同样 大小 的 小方块 拼 宝塔 ， 第一层 放 1 个 ， 以后 每 一层 都 比 前 一层 多 放 2 个 ， 已知 这个 宝塔 共有 20 层 ． 那么 ， 欧 欧 拼成 这个 宝塔 一 共用 了 小方块 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8674", "content": "东方 外语学校 要 建 一栋 教学楼 ， 原 计划 投资 150 万元 ， 实际 只用 了 120 万元 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14833", "content": "某 池塘 的 睡莲 每天 长大 一倍 ， 28 天 就 能 把 整个 池塘 遮住 ， 问 ： 睡莲 遮住 半个 池塘 需要 多少 时间 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9762", "content": "2006 年 ， 某市 决定 两年 内 修建 一条 80 千米 的 环城 汽车 专用道 ， 到 去年 年底 ， 已修 的 和 专用道 全长 的 比 是 3 ： 5 ， 今年 还要 修 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13817", "content": "小 军 看 一 本书 ， 每天 看 20 页 ， 7 天 看 完 ， 这 本书 有 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7015", "content": "小 华 有 书 的 本 数 比 小 明 多 20 本 ， 小 明 书 的 本 数 比 小 华 少 (1/8) ， 小 方 有 书 的 本 数 是 小 明 的 (1/2) ， 小 方 有 书 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "455", "content": "在 一次 跳高 比赛 中 ， 欢欢 跳 过 了 1.1 米 ， 红红 比 欢欢 跳 的 低 0.1 米 ， 强强 比 欢欢 跳 的 高 0.2 米 ， 强强 跳 过 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14484", "content": "水 结成 冰 ， 体积 增加 (1/10) ． 现有 一块 冰 ， 体积 是 4 立方厘米 ， 融化 后 的 体积 = 多少 立方厘米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6650", "content": "甲乙 相距 500 千米 ， 客车 从 甲地 开往 乙地 ， 每 小时 行 40 千米 ， 1 小时 后 ， 火车 从 乙地 开往 甲地 ， 每 小时 行 60 千米 ， ． 货车 出发 后 几小时 与 客车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14031", "content": "宏富 超市 购进 一批 食盐 ， 第一个 月 售出 这 批 盐 的 40% ， 第 二 个 月 又 售出 这 批 盐 的 420 袋 ， 这时 已 售出 的 和 剩下 食盐 的 数量 比 是 3 ： 1 ， 则 宏富 超市 购进 的 这 批 食盐 有 多少 袋 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12721", "content": "一 件 大衣 现价 是 600 元 ， 相当于 原价 的 (5/6) ， 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18908", "content": "果园 里 有 240 棵 桃树 ， 占 苹果树 的 (3/4) ， 苹果树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16153", "content": "做一套 衣服 用布 2 米 ， 成本价 是 86 元 ， 这 套 衣服 卖出 的 价格 是 120 元 ， 现有 300 米 布 ， 全部 制成 这种 衣服 出售 ， 全部 售出 可 得 利润 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14327", "content": "3 （ 1 ） 班 有 共有 48 人 ， 32 人 订阅 了 《 小学生 作文 》 ， 有 24 人 订阅 《 少年 科技 》 ， 每人 至少 订阅 其中 的 一种 ， 两种 杂志 都 订阅 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21563", "content": "(3/4) - (1/3) 的 差 加上 (5/6) ， 和 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14288", "content": "一 个 圆柱体 底面 半径 是 2 厘米 ， 高 8 厘米 ， 如果 把 它 沿着 高 切成 两个 体积 相等 的 半 圆柱体 ， 然后 把 这 两个 半 圆柱体 接 成 一个 大半 圆柱体 ， 这个 大半 圆柱体 的 表面积 = 多少 平方厘米 ？", "knowledge": ["*", "+", "^"], "difficulty": 0.9, "length": 21}
-{"question_id": "10944", "content": "学校 打字员 打 一篇 510 字 的 稿件 ， 5 分钟 就 完成 了 ． 平均 每分钟 打 多少 字 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6164", "content": "有 盐水 25 千克 ， 含盐 20% ， 加 了 一些 水 后 含盐 8% ， 加 了 多少 水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15551", "content": "一 种 商品 提价 15% 后 是 184 元 ， 这种 商品 的 原价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21852", "content": "10 千克 的 油 ， 卖出 (4/5) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17550", "content": "144 / 72 的 商 加上 467 ， 所得 的 和 乘 18 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22662", "content": "爸爸 体重 65 千克 ， 正好 比 小 明 重 30% ． 小 明 重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21296", "content": "小 明 爸爸 的 月工资 是 2840 元 ， 按照 个人所得税 的 有关 规定 ， 超过 2000 元 部分 要 缴纳 20% 的 个人所得税 ， 那么 小 明 爸爸 月工资 应 缴纳 所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5764", "content": "笑笑 看 课外书 ， 第一天 看 了 全书 的 (1/10) ， 第 二 天 看 了 全书 的 (1/5) ， 第 3 天 看 了 全书 的 (3/10) ， 还 剩 全书 的 几分 之 几 没 看 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17021", "content": "果园 里 有 苹果树 15 棵 ， 桃树 的 棵 数 是 苹果树 的 (2/3) ， 又 是 杏树 的 (2/7) ， 杏树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "845", "content": "一 筐 苹果 连 筐 重 41.5 千克 ， 取出 一半 苹果 后 ， 连 筐 还 重 21.5 千克 ， 筐 重 多少 千克 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17239", "content": "李老师 爱好 书法 ， 天天 练 钢笔字 和 毛笔字 ． 他 每天 要 练 100 个 钢笔字 ， 正好 是 毛笔字 的 4 倍 ． 李老师 每天 一共 要 练 多少 个 字 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17044", "content": "六年级 男生 人数 和 女生 人数 的 比 是 5 ： 4 ， 女生 人数 占 全年 级 总 人数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18181", "content": "甲 、 乙 两艘 军舰 ， 从 两个 港口 对 开 ， 甲 舰 每 小时 行 42 千米 ， 乙 舰 每 小时 行 38 千米 ． 乙 舰 开出 1 小时 后 ， 甲 舰 才 开出 ． 再 经过 4 小时 两 舰 相遇 ． 两个 港口 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6227", "content": "一 块 蛋糕 ， 如果 爸爸妈妈 各 吃 了 它 的 (1/5) ， 那么 小巧 能 吃 这块 蛋糕 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21150", "content": "玩具厂 原 计划 生产 电动玩具 80000 件 ， 实际 比 计划 多 生产 (1/5) ． 实际 生产 电动玩具 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22539", "content": "某 汽车厂 去年 计划 生产 汽车 12600 辆 ， 结果 上半年 完成 了 全年 计划 的 (5/9) ， 下半年 完成 全年 计划 的 (3/5) ． 全年 超产 汽车 多少 辆 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11748", "content": "一 根 绳子 长 40 米 ， 剪 去 一段 后 ， 还 剩 (3/4) ， 剪 去 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22356", "content": "现有 5 个 同学 参加 数学 竞赛 ， 其中 4 人 的 平均 成绩 是 80 分 ， 加上 小 刚 的 分数 后 ， 平均 成绩 是 83 分 ， 小 刚 考 了 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18275", "content": "一 本书 60 页 ， 读 了 60% ， 多少 页 没有 读 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10030", "content": "学校 准备 发 故事书 给 19 个 班 ， 每班 240 本 ， 还 留下 50 本 作为 备用 ． 学校 应 准备 多少 本 故事书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17928", "content": "两个 因数 的 积 是 6 ， 如果 一个 因数 扩大 5 倍 ， 另 一个 因数 扩大 10 倍 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6361", "content": "水果 店里 有 苹果 75.2 kg ， 比 生 梨 多 23.7 kg ， 水果 店里 有 苹果 和 生 梨 一共 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5843", "content": "某 果园 有 梨树 4800 棵 ， 比 苹果树 多 800 棵 ， 梨树 比 苹果树 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "554", "content": "有 含盐 20% 的 盐水 40 克 ， 要 配制 成 含盐 8% 的 盐水 ， 需 加水 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19775", "content": "商店 运进 240 箱 苹果 ， 每次 运 8 箱 ， 要 几次 才能 完成 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8589", "content": "神童 幼儿园 里 买来 一些 玩具 ， 如果 每班 分 8 个 玩具 ， 就 多出 2 个 玩具 ， 如果 每班 分 10 个 玩具 ， 就 少 12 个 玩具 ， 幼儿园 里 有 多少 个 班 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1123", "content": "帆船 每分钟 行驶 0.18 千米 ， 摩托艇 每分钟 行驶 0.62 千米 ， 两种 船 都 行驶 8.5 分钟 ， 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11813", "content": "要 配制 成 一种 含盐 率 为 20% 的 盐水 ， 现有 35 克 盐 ， 需要 加水 多少 克 水 才能 配制 成 这种 盐水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1756", "content": "甲乙 两 人 共 买 了 20 本书 ， 如果 甲 给 乙 6 本 ， 那么 甲 就 比 乙 少 2 本 ， 乙 买 了 多少 本书 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4314", "content": "修路 队 要 修 一条 公路 ， 每天 修 36 米 ， 修 了 8 天 后 还有 152 米 没 修 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19013", "content": "一 块 方砖 的 面积 是 (4/25) 平方米 ， 一个 房间 用 了 425 块 方砖 ， 这 间 房 的 地面 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8388", "content": "一 辆 客车 从 甲地 开往 乙地 ， 3 小时 行 了 174 千米 ． 照 这样 的 速度 ， 还要 行 9 小时 才能 到达 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19084", "content": "学校 图书室 有 故事书 562 本 ， 比 文艺 书 多 208 本 ， 少儿 科技 书 一本 数 正好 是 文艺 书 的 2 倍 ， 学校 图书室 共有 科技 书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14333", "content": "(8/15) - (1/5) 的 差 除 3 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20515", "content": "5 年 一班 同学 植树 ， 60 人 2 小时 共 植树 120 棵 ， 平均 每人 每 小时 植树 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2525", "content": "从 甲 城 到 乙 城 铁路 长 312 千米 ， 以前 快车 要 行 5.2 小时 ， 现在 只要 行 3.9 小时 ， 现在 比 过去 平均 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7571", "content": "一 把 办公椅 62 元 ， 一张 办公桌 的 价钱 比 椅子 的 3 倍 多 32 元 ， 买 一张 办公桌 用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16644", "content": "一 个数 的 7 倍 是 2100 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15266", "content": "商店 运 来 7 袋 白糖 ， 从 每 袋中 取出 16 千克 后 ， 余下 的 白糖 恰好 等于 原来 3 袋 的 重量 ， 原来 一袋 白糖 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3381", "content": "某 数 增加 它 的 30% 后 是 78 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14884", "content": "一 双 皮鞋 0.9 出售 ， 顾客 可以 比 原价 少 花 20 元 ， 这种 皮鞋 原价 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15294", "content": "甲 、 乙 两地 相距 300 千米 ， 大 货车 和 客车 同时 从 甲 、 乙 两地 相对 开出 ， 4 小时 后 两车 相遇 ． 已知 大 货车 每 小时 行 35 千米 ， 求 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14250", "content": "从 240 里 连续 减去 多少 个 16 ， 结果 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11530", "content": "圆柱体 的 高 是 5 米 ， 它 的 底面 周长 是 3.14 米 ， 这个 圆柱体 的 侧 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18628", "content": "一 辆 快 客 3 小时 行驶 315 千米 ， 一辆 普通 客车 4 小时 行驶 320 千米 ． 快 客 平均 每 小时 比 普通 客车 多 行驶 多少 千米 ？ （ 列 综合 算式 计算 ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18294", "content": "在 一个 比例 中 ， 两个 外 项 互为 倒数 ， 其中 一个 内 项 是 (3/7) ， 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14947", "content": "学校 合唱队 中 男生 36 人 ， 女生 人数 比 男生 的 2 倍 多 12 人 ． 合唱队 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22468", "content": "一 条 绳子 长 10 米 ， 用 去 2 米 ， 剩下 的 占 全长 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10206", "content": "小 明 和 小 新 在 同一 街道 ， 小 明 家 在 学校 东 600 米处 ， 小 新 家 在 学校 西 200 米处 ， 那么 小 新 家 距离 小 明 家 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18426", "content": "甲乙 两个 最 简分数 的 分子 相同 ， 分母 的 比 是 3 ： 2 ． 若 甲乙 之 和 是 (25/12) ， 则 甲 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12265", "content": "华 立 家 离 学校 大约 3600 米 ， 放学 后 他 从 学校 走 回家 ， 同时 他 妈妈 从 家 骑 电动车 来 接 华 立 ， 12 分钟 后 两 人 相遇 ． 已知 华 立 和 妈妈 的 速度 之 比 是 1 ： 5 ， 华 立 每分钟 行 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5624", "content": "一 块 菜地 ， 用 其中 的 (5/9) 种 萝卜 ， (1/9) 种 白菜 ， 萝卜 地 和 白菜 地 一共 占 总面积 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21187", "content": "利群 超市 运进 一批 大米 ， 大 、 小袋 各 16 袋 ， 大袋 每 袋 50 千克 ， 小袋 每 袋 25 千克 ． 利群 超市 一共 运进 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16417", "content": "中心小学 舞蹈 兴趣小组 有 38 人 ， 合唱 兴趣小组 的 人数 是 舞蹈 兴趣小组 人数 的 3 倍 ． 两个 兴趣小组 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8790", "content": "一 件 商品 ， 对 原价 打 0.8 和 打 0.6 的 售价 相差 4.8 元 ， 那么 这件 商品 的 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15956", "content": "某 商场 出售 一批 冰箱 ， 第一天 卖出 总数 的 (2/5) 又 16 台 ， 第 二 天 卖出 总数 的 (1/3) ， 正好 售完 ． 这 批 冰箱 共 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11955", "content": "某班 男生 比 女生 多 (2/7) ， 这个 班 女生 比 男生 少 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20732", "content": "钢笔 原价 10 元 ， 打 0.85 后 ， 现价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17273", "content": "永胜 小学 4 、 5 、 6 共 捐款 2040 元 ， 其中 四年级 的 捐款 是 六年级 的 (3/4) ， 六年级 捐款 额 的 (4/5) 与 五年级 刚好 相等 ． 六年级 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5564", "content": "王 叔叔 从 我 村 送 烟叶 去 县城 ， 去 时 以 40 千米 / 时 的 速度 行驶 了 3 小时 ， 返回 时 王 叔叔 只用 了 2 小时 ． 王 叔叔 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6128", "content": "甲 、 乙 两个 生产组 为 迎 世博 做 “ 海 宝 ” ． 甲组 每天 可 做 200 个 ， 乙组 每天 可 做 250 个 ； 甲组 先 做 了 400 个 ， 乙组 才 开始 做 ． 乙组 做 了 几天 后 ， 才能 与 甲组 做 的 同样 多 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5174", "content": "蔬菜 店 早上 运 来 8 筐 青菜 ， 每 筐 重 76 千克 ， 卖 了 一部分 后 还 剩 176 千克 ， 卖掉 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20820", "content": "某校 买来 一批 图书 ， 放在 两个 书柜 中 ， 其中 第一 柜 的 本 数 占 这 批 图书 的 58% ， 如果 从 第一 柜 取出 32 本 ， 放到 第 二 柜 中 ， 这时 两个 书柜 的 书 各 占 这 批 图书 的 (1/2) ． 这 批 图书 共 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7910", "content": "小齿轮 每分钟 转 85 周 ， 比 大 齿轮 每分钟 转 的 周 数多 (2/3) ， 大 齿轮 每分钟 转 多少 周 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "888", "content": "在 一堂 40 分钟 的 数学课 中 ， 学生 操作 实验 的 时间 占 (2/5) ， 学生 操作 实验 用 了 多少 时间 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22463", "content": "某 修路 队 要 修 一条 路 ， 已经 修 了 378 米 ， 是 未 修 的 14 倍 ， 这 条 路 全长 多少 米 ？ （ 用 综合 算式 来 解答 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22743", "content": "甲 船 每 小时 行驶 30 千米 ， 乙 船 每 小时 行驶 26 千米 ， 两 船 同时 同 地 背向 出发 巡逻 ， 2 小时 后 ， 甲 船 返回 去 追 乙 船 ， 几小时 后 追 上 乙 船 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22211", "content": "同学 们 站队 做操 ， 站 成 40 行 ， 每行 36 人 ， 如果 每行 72 人 ， 要 站 成 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16304", "content": "小金 身高 140 cm ， 是 小 红 身高 的 (7/8) ， 小 红 身高 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12975", "content": "六年级 有 160 人 参加 数学 竞赛 ， 其中 女生 人数 是 男生 的 (7/9) ． 参加 数学 竞赛 的 男生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "58", "content": "妈妈 在 水果 店里 买 了 18 个 苹果 ， 小 刚 吃 了 3 个 ， 妈妈 吃 了 7 个 ， 还 剩 多少 个 苹果 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6356", "content": "在 一个 比例 中 ， 两个 外 项 的 积 是 128 ， 其中 一个 内 项 是 16 ， 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20210", "content": "一 瓶 饮料 ， 已经 喝 了 全部 的 (2/5) ， 瓶 里 还 剩 270 毫升 ， 已经 喝 了 多少 毫升 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20692", "content": "计算 2009 * 98 + 4018 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5553", "content": "学校 图书室 原有 故事书 907 本 ， 借出去 416 本 ， 后来 又 还 回来 245 本 ， 图书室 现在 有 故事书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15309", "content": "(1/3) 与 (1/5) 的 和 乘 (8/15) ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15373", "content": "把 一根 钢管 锯 成 小 段 ， 一共 花 了 28 分钟 ， 已知 每 锯开 一段 需要 4 分钟 ， 这根 钢管 被 锯 成 了 多少 段 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19108", "content": "一 个数 除以 5 得 9 ， 余数 是 3 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16244", "content": "体操队 共有 队员 50 人 ， 某 天 的 出勤率 事 98% ， 当天 缺勤 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1731", "content": "小 红 从 家 到 学校 走 了 8 分钟 ， 每分钟 走 50 米 ． 从 学校 到 体育馆 走 了 800 米 ， 用 了 12 分钟 ． 小 红 从 家 走 到 体育馆 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9015", "content": "甲 、 乙 两辆 汽车 从 相距 255 千米 a 、 b 两地 同时 相向 开出 ， 甲 车 的 速度 是 45 千米 / 时 ， 乙 车 的 速度 是 40 千米 / 时 ， 他们 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13874", "content": "甲乙 两名 打字员 合 打 一份 稿件 ， 第一天 甲 打 了 总数 的 (1/4) ， 乙 打 了 总数 的 (2/5) ， 结果 还有 7000 字 没有 打 ． 这份 稿件 共有 多少 字 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11307", "content": "每箱 矿泉水 24 瓶 ， 每瓶 3 元 ， 运动会 上 ， 张老师 给 同学 们 买 了 2 箱 矿泉水 ， 共 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3399", "content": "小 方 读 一本 科技 书 ， 第一天 读 了 20 页 ， 占 全书 的 (1/5) ， 第 二 天 读 了 全书 的 40% ； 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18076", "content": "某 饲养场 养鸡 14000 只 ， 鸭 的 只 数 是 鸡 的 (3/7) ， 鹅 的 (3/5) 与 鸭 的 只 数 相等 ， 鹅 有 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12242", "content": "上海 到 天津 的 铁路 长 1325 千米 ， 一列 火车 从 上海 开往 天津 ， 已 行 了 (3/5) ， 剩下 的 路程 如果 每 小时 行 106 千米 ， 还要 几小时 到达 天津 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20011", "content": "一 个 工厂 原来 每天 制造 零件 1800 个 ， 比 现在 少 10% ， 现在 每天 制造 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15121", "content": "一 件 原价 45 元 的 商品 ， 降价 40% 后 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12193", "content": "学校食堂 原有 14 瓶 金龙鱼 油 ， 用 了 5 瓶 ， 剩下 的 占 原来 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18954", "content": "一 辆 汽车 和 一辆 拖拉机 同时 从 甲 城 出发 开往 乙 城 ， 汽车 每 小时 行驶 49 千米 ， 拖拉机 每 小时 行驶 35 千米 ， 出发 6 小时 后 ， 汽车 先 到达 乙 城 ， 再 经过 几小时 后 拖拉机 才能 到达 乙 城 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19914", "content": "一 台 电子词典 原价 是 320 元 ， 打 0.85 后 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10880", "content": "王 叔叔 从 某 城市 乘火车 到 北京 ， 火车 每 小时 行 125 千米 ， 行 了 12 小时 ， 还有 280 千米 到 北京 ． 该 城市 到 北京 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11570", "content": "体育馆 有 足球 18 个 ， 排球 个数 是 足球 的 3 倍 ． 这个 体育馆 有 足球 和 排球 共 多少 个 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18572", "content": "豆腐店 有 10 袋 黄豆 ， 每 袋 50 千克 ． 1 千克 黄豆 做 4 千克 豆腐 ． 这些 黄豆 能 做 多少 千克 豆腐 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21600", "content": "王老师 买 了 两本 参考书 ． 《 小学 数学 教学 指导 》 12.36 元 ， 《 数学 手册 》 比 《 小学 数学 教学 指导 》 多 4.25 元 ． 王老师 给 了 售货员 50 元 ， 应 找回 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1914", "content": "学校 为 艺术节 选送 节目 ， 要 从 3 个 合唱 节目 中 选出 2 个 ， 4 个 舞蹈 节目 中 选出 1 个 ， 一共 有 多少 种 选送 方案 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10418", "content": "某 工程队 修 一条 长 1000 千米 的 公路 ， 第一周 完成 了 全长 的 (1/7) ， 第 二 周 和 第 3 周 各 完成 了 全长 的 (2/5) ， 还 剩下 全长 的 几分 之 几 没 修 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10983", "content": "汽车厂 计划 25 天 组装 汽车 4000 辆 ， 实际 提前 5 天 完成 ， 实际 平均 每天 组装 汽车 多少 辆 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13805", "content": "果园 里 苹果树 25 棵 ， 占 果树 总数 的 20% ， 果园 共有 果树 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17215", "content": "光明 幼儿园 大 班 和 中 班 一共 有 75 人 ， 其中 大 班 的 人数 占 (3/5) ， 中 班 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11888", "content": "学校 文艺 组 有 72 人 ， 比 美术组 人数 的 2 倍 少 10 人 ， 学校 文艺 组 和 美术组 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21165", "content": "一 个 长方体 木块 的 长 、 宽 、 高 分别 为 10 厘米 、 8 厘米 、 6 厘米 ， 如果 用 它 锯 成 一个 最大 的 正方体 ， 体积 减少 了 百分之几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "5626", "content": "王 阿姨 从 某 城市 乘火车 来 北京 ， 火车 每 小时 行 120 千米 ， 行 了 15 小时 ， 回去 时 乘 汽车 ， 每 小时 行 90 千米 ， 回去 时 用 多少 时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8175", "content": "欣欣 牌 换气扇 原来 每 台 售价 150 元 ， 夏季 促销 时 每 台 降低 到 120 元 ， 降价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3411", "content": "建造 一幢 教学大楼 ， 计划 投资 150 万元 ， 实际 投资 比 计划 节省 (1/5) ， 比 计划 投资 节省 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6801", "content": "学校 买来 540 本 新书 ， 其中 科技 书 占 (1/6) ， 故事书 占 (1/3) ． 科技 书 和 故事书 共 买来 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7672", "content": "3 （ 1 ） 班 有 46 人 ， 其中 29 人 参加 了 体育 小组 ， 25 人 参加 了 美术 小组 ， 有 15 人 两个 小组 都 参加 了 ． 有 多少 人 两个 小组 都 没 参加 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8700", "content": "白云 园 12 个 班 的 同学 去 春游 ， 平均 每班 有 36 人 ， 共有 9 辆 大客车 ， 平均 第 辆 大客车 坐 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22413", "content": "修 一条 公路 ， 第一个 月 修 了 全长 的 20% ， 第 二 月 修 了 300 km ， 还 剩下 100 km 没有 修 ． 这 条 公路 全长 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15751", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 前 3 小时 共 行 163 千米 ， 后 2 小时 共 行 102 千米 ． 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3921", "content": "小 青 自己 订 草稿本 ， 每 本 70 页 ． 订 了 5 本 后 还 剩 50 张 纸 ， 她 原来 有 多少 张 纸 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7694", "content": "3 / 72 商 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17169", "content": "一 根 木头 ， 锯 去 12.5 米 ， 还 剩下 3.8 米 ． 这根 木头 原来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9582", "content": "小 华 爸爸 的 年龄 是 爷爷 的 (8/15) ， 是 小 华 的 (10/3) ． 如果 爷爷 今年 75 岁 ， 小 华 今年 几岁 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9649", "content": "甲 用 (3/4) 小时 行 了 总 路程 的 (2/3) ， 那么 甲 还要 行 多少 小时 才能 走 完 总 路程 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13266", "content": "爸爸 买 500 克 西红柿 用 了 0.8 元 ， 买 一棵 白菜 用 了 2.6 元 ． 一 共用 去 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "208", "content": "△ / 8 = ○ … □ ， □ 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15873", "content": "某 小区 有 8 幢 楼 ， 每 幢 楼 有 102 户 居民 ， 平均 每户 每月 交 水费 9 元 ， 这个 小区 每月 共 交 水费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4336", "content": "某 生态 家禽 饲养 基地 养鸡 5000 只 ， 鹅 的 只 数 是 鸡 的 (4/5) ， 又 是 鸭 的 (5/8) ． 这个 饲养 基地 养鸭 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11385", "content": "某 车间 一天 的 出勤率 是 98% ， 有 4 人 请假 ， 这个 车间 共有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20509", "content": "多少 吨 比 35 吨 多 15% ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19648", "content": "一 箱 珠 尔 山 矿泉水 有 24 瓶 ， 每瓶 售价 0.8 元 ， 学校 买来 32 箱 ， 一共 要 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2612", "content": "修 一条 铁路 ， 如果 平均 每 3 米铺 5 根 枕木 ， 共 要 用 5000 根 枕木 ． 如果 平均 每 4 米铺 6 根 枕木 ， 共 要 用 多少 根 枕木 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4923", "content": "机床厂 今年 计划 比 去年 多 生产 机床 320 台 ， 正好 比 去年 增产 20% ， 今年 计划 生产 机床 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19224", "content": "小 红 有 故事书 160 本 ， 是 小 萍 故事 书本 数 的 2 倍 ， 而 小 冬 的 本 数 是 小 萍 的 3 倍 ． 小 冬 故事书 的 本 数 = 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14629", "content": "一 箱 装有 24 瓶 饮料 的 箱子 重 15 千克 ， 取出 饮料 后 称 得 箱子 重 (3/4) 千克 ， 问 每瓶 饮料 平均 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1389", "content": "5 箱 蜜蜂 一年 可以 酿 375 千克 蜂蜜 ． 李 明 家养 了 12 箱 这样 的 蜜蜂 ， 一年 可以 酿 多少 千克 蜂蜜 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19956", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 45 千米 ， 3 小时 后 恰好 行 了 全程 的 (5/7) ， 求 甲乙 两地 的 路程 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7926", "content": "汶川 大 地震 后 ， 希望 小学 4 个 年级 共 捐款 1200 元 ， 平均 每个 年级 有 学生 25 人 ， 平均 每人 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14867", "content": "一 辆 汽车 自驾游 从 a 市 开往 b 市 ， 3 小时 行驶 了 330 千米 ． 照 这样 计算 ， 再 行驶 5 小时 才能 到达 b 市 ． a 市 到 b 市 有 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15556", "content": "光明 小学 303 班 共有 35 名 同学 ， 在 选择 兴趣 课时 ， 有 18 人 报 了 美术班 ， 22 人 报 了 音乐 班 ， 既 报 美术班 又 报 音乐 班 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8496", "content": "一 批 水果 ， 苹果 是 梨 的 (5/6) ， 梨 又 是 香蕉 的 (2/3) ． 苹果 150 千克 ， 香蕉 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23091", "content": "一 袋 大米 重 50 千克 ， 吃 了 60% ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "902", "content": "3 千克 的 (1/5) 和 多少 千克 的 (3/5) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16000", "content": "一 本 《 成语 接龙 》 14.8 元 ， 买 2 本 应付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18702", "content": "一 个 公园 原有 20 条 游船 ， 每天 收入 1440 元 ． 照 这样 计算 ， 再 增加 6 条 同样 的 游船 ， 每天 可以 多 收入 （ 多少 ） 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3167", "content": "南溪 镇 中小学 在 大礼堂 举行 开学典礼 ， 礼堂 座位 是 8 排 ， 每排 有 168 个 位置 ． 现在 位置 空 出 了 17 个 ， 一共 有 多少 人 参加 这个 开学典礼 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11685", "content": "修 一条 公路 ， 每天 修 全长 的 (1/16) ， 修 了 6 天 以后 ， 还有 7.5 千米 没 修 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20370", "content": "3 筐 苹果 的 价钱 等于 4 筐 梨 的 价钱 ． 一筐 苹果 40 元 ， 一筐 梨 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15224", "content": "一 根 2 米 长 的 电线 ， 第一次 用 去 全长 的 25% ， 第 二 次 用 去 (1/4) 米 ， 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11536", "content": "某 部队 长途 行军 到 某地 ， 行 了 12 天 ， 平均 每天 行军 路程 减少 5 千米 ， 使得 剩下 的 366 千米 的 路程 还要 行 15 天 ， 这次 行军 的 总 路程 = 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12798", "content": "在 一堆 芒果 中 ， 国王 取 (1/6) ， 王后 取 剩下 的 (1/5) ， 3 个 王子 分别 取 逐次 余下 的 (1/4) 、 (1/3) 、 (1/2) ， 最 年幼 的 王子 取 剩下 的 3 个 芒果 ． 你 知道 芒果 的 总数 = ？", "knowledge": ["-", "/"], "difficulty": 0.9, "length": 21}
-{"question_id": "3130", "content": "爱心 小学 六年级 同学 参加 学校 组织 的 赈灾 捐款 活动 ． 一班 48 人 ， 共 捐款 268 元 ； 二 班 50 人 ， 共 捐款 297 元 ； 3 班 46 人 ， 平均 每人 捐款 6.5 元 ． 六年级 同学 平均 每人 捐款 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2018", "content": "向阳 花园 新建 8 幢 楼房 ， 每 幢 楼房 住 104 户 ， 新建 的 楼房 一共 能 住 多少 户 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10561", "content": "某 蔬菜园 有 一天 收获 黄瓜 1500 千克 ， 收获 的 西红柿 比 黄瓜 少 (1/5) ． 把 收获 的 西红柿 按 每 30 千克 装 一筐 ， 需要 装 多少 筐 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22644", "content": "池塘 里 有 鹅 15 只 ， 鸭 的 只 数 是 鹅 的 3 倍 ， 鸭 和 鹅 一共 有 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15801", "content": "粮店 运进 一批 大米 ， 第一天 卖出 总数 的 (1/5) ， 第 二 天 比 第一天 少卖 15 袋 ， 这时 卖出 的 与 剩下 的 袋 数 比 是 3 ： 5 ， 这 批 大米 共有 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10310", "content": "蜗牛 从 24 厘米 深 的 杯底 往上爬 ， 每 爬 6 厘米 要 用 3 分钟 ． 然后 停 2 分钟 ， 问 蜗牛 从 杯底 爬 到 杯口 要 用 多少 时间 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4734", "content": "光明 小学 六年级 已经 达到 《 国家 体育锻炼 标准 》 的 学生 人数 占 全年 级 总 人数 的 (7/9) ， 达标 的 学生 中 有 (3/7) 是 女生 ， 达标 的 男生 占 六年级 总 人数 的 几分 之 几 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9483", "content": "天平 的 一端 放 着 一块 巧克力 ， 另一端 放 着 (1/4) 块 巧克力 和 90 克 砝码 ， 这时 天平 恰好 平衡 ． 一块 巧克力 的 质量 = 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16502", "content": "195 的 3 倍 - 608 / 2 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12296", "content": "小 红 有 3 件 上衣 和 4 条 裤子 ， 配成 一套 衣服 ， 有 多少 种 不同 的 搭配 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12993", "content": "一 辆 汽车 从 甲 城 到 乙 城 每 小时 行 40 千米 ， 经过 4 小时 后 ， 离 乙 城 还有 34 千米 ． 甲 、 乙 两城 之间 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17211", "content": "今天 口渴 我 带 了 (3/4) 瓶 水 ， 中午 喝 了 (1/4) 瓶 ． 还 剩下 多少 瓶 水 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1732", "content": "把 一根 长 (9/10) 米 的 钢材 锯 成 相等 的 若干段 ， 一共 锯 了 5 次 ， 平均 每 段长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8834", "content": "一 个 修路 队 修 一条 公路 ， 前 4 天 每天 修 12.5 千米 ， 后 5 天 每天 修 13.4 千米 ， 这个 修路 队 平均 每天 修路 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11667", "content": "水果店 运 来 苹果 35 千克 ， 运 来 的 桔子 是 苹果 的 4 倍 ． 水果店 运 来 的 苹果 比 桔子 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15582", "content": "揭阳 实验 小学 8 月份 用水 160 吨 ， 比 7 月份 节约用水 40 吨 ， 节约用水 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17348", "content": "某 项目 计划 投资 250 万元 ， 实际 投资 200 万元 ， 实际 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6580", "content": "少年宫 参加 艺术 培训 的 女生 有 123 人 ， 男生 78 人 ． 参加 数学 培训 的 学生 人数 是 艺术 培训 的 2 倍 ， 参加 数学 培训 的 学生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7592", "content": "光明 小学 四年级 有 382 人 ， 五年级 比 四年级 多 58 人 ． 六年级 人数 是 五年级 人数 的 1.2 倍 ． 六年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19661", "content": "一 条 路 的 一边 从头到尾 共 种 了 36 棵 树 ， 每 两棵树 间隔 5.6 米 ， 这 条 路 长 约 多少 米 ？ （ 得数 保留 整数 ）", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11234", "content": "某 电器城 上个月 买 出 电视机 150 台 ， 卖出 冰箱 的 台数 是 电视机 的 (4/5) ， 卖出 的 冰箱 比 电视机 少有 多少 台 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8696", "content": "粮店 运 来 面粉 500 袋 ， 运 来 大米 比 面粉 少 10% ． 运 来 大米 多少 袋 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12483", "content": "学校 买来 5 个 书架 ， 每个 书架 有 4 层 ， 每层 可以 放 45 本书 ， 这些 书架 一共 可以 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20322", "content": "一 个 粮油 店 ， 第一天 卖 了 全部 面 的 (1/3) ， 第 二 天 卖 了 余下 的 40% ， 两天 一共 卖出 144 袋 ． 这个 粮油 店 共有 多少 袋 面 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5915", "content": "园林 工人 沿 公路 一侧 植树 ， 每隔 6 米 种 一棵 ， 一共 种 100 棵 ， 从 第 l 棵 到 最后 一棵 的 距离 = 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "885", "content": "某 工程队 计划 修 一条 12 千米 的 水渠 ， 开工 3 天 修 了 1.5 千米 ． 照 这样 计算 ， 修 完 这 条 水渠 一共 要 用 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18210", "content": "学校食堂 运 来 面粉 140 千克 ， 运 来 的 大米 是 面粉 的 2.5 倍 还 多 15 千克 ． 学校食堂 运 来 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11442", "content": "一 个数 的 7 倍 是 91 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3576", "content": "两个 加数 的 和 比 一个 加数 大 12 ， 比 另 一个 加数 大 17 ， 这 两个 加数 的 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16897", "content": "某 花店 一天 卖出 玫瑰 120 枝 ， 卖出 的 康乃馨 是 玫瑰 的 (3/5) ， 同时 又 是 百合 的 (3/4) ． 卖出 百合 多少 枝 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18461", "content": "声音 在 空气 中 的 传播速度 是 340 米 / 秒 ． 在 一个 雷雨 天 ， 壮 壮 在 看到 闪电 4 秒钟 后 听到 了 雷声 ， 壮 壮 当时 距离 打雷 的 地方 大约 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3015", "content": "一 块 平行四边形 的 地 ， 底 53 米 ， 高 16 米 ． 在 这块 地上 栽 桃树 ， 每棵 占地 4 平方米 ． 这块 地 大约 能 栽 多少 棵 桃树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22271", "content": "妈妈 买 了 15 个 梨 ， 小 华 吃掉 3 个 后 ， 把 剩下 平均 放在 3 个 袋子 里 ， 平均 每个 袋子 里 装 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "918", "content": "一 部 儿童 电视剧 ， 共 336 分钟 ， 分 8 集 播放 ， 每集 大约 播放 多长时间 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2303", "content": "一 台 mp3 的 售价 是 100 元 ， 是 一台 小 录音机 的 (1/2) ， 一台 小 录音机 的 价格 又 是 一台 电视机 的 (1/20) ， 一台 电视机 的 售价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7752", "content": "小 明 去 公园 游玩 ， 在 动物园 停留 了 (1/3) 小时 ， 在 植物园 停留 了 (1/5) 小时 ， 其余 时间 都 在 儿童乐园 ， 在 儿童乐园 停留 了 (1/2) 小时 ， 小 明 在 公园 一共 停留 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12866", "content": "王 大伯 家 有 一块 菜地 ， 他 把 其中 的 种 (2/7) 白菜 ， (3/7) 种 萝卜 ． 种 白菜 和 萝卜 的 地 一共 是 这块 地 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14541", "content": "甲 、 乙 两地 之间 的 距离 是 456 千米 ， 一辆 客车 和 一辆 货车 同时 从 两地 相向 而 行 ， 客车 的 速度 是 每 小时 45 千米 ， 货车 的 速度 是 每 小时 36 千米 ， 3 小时 后 ， 两车 还 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19248", "content": "20 个 小朋友 围成 一圈 玩 丢 手绢 的 游戏 ， 手绢 落到 每个 小朋友 后面 的 可能性 都 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17955", "content": "甲 、 乙 两城 相距 860 千米 ， 一辆 汽车 以 每 小时 60 千米 的 速度 从 甲 城 开往 乙 城 ， 行 了 11 小时 后 ， 汽车 离 乙 城 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15247", "content": "足球比赛 分 上下 两个 半场 ， 上半场 45 分钟 ， 下半场 跟 上半场 的 时间 一样 ， 中间 休息 15 分钟 ， 全场 比赛 需要 多少 时间 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9341", "content": "把 1 厘米 长 的 线段 平均 分成 10 小格 ， 每 小格 长 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15576", "content": "卡车 每 小时 行 62 千米 ， 火车 每 小时 行驶 的 是 卡车 的 2 倍 还 少 12 千米 ， 火车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9881", "content": "裤子 每 条 75 元 ， 是 上衣 单价 的 (3/5) ． 买 一套 这样 的 衣服 要 用 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15077", "content": "一 条 裤子 的 价格 是 18 元 ， 一件 上衣 的 价格 是 一条 裤子 的 3 倍 ， 买 一套 这样 的 衣服 共用 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22948", "content": "一 个 环形 的 外 圆 直径 是 10 cm ， 内 圆 半径 是 4 cm ， 它 的 面积 多少 cm ^ 2 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.5, "length": 13}
-{"question_id": "21094", "content": "奶奶 养 了 24 只 鸡 ， 养鸭 的 只 数 比 鸡 多 16 只 ． 养 鹅 的 只 数 比 鸭 少 8 只 ． 奶奶 养 了 几只 鹅 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20817", "content": "20 - 13.8 的 差 去除 49.6 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12904", "content": "某 服装 商场 举行 促销 活动 ， 所有 商品 均 降价 (1/3) ． 妈妈 买 了 一套 原价 1500 元 的 衣服 ， 需要 付 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4060", "content": "“ 6 一 ” 节 那天 ， 新华 公园 举行 庆祝 活动 ， 其中 有 一个 活动 是 用 铁丝 做 几何图形 框架 ． 一根 36 米 长 的 铁丝 ， 小 明 用 去 (1/3) 做 了 一个 长方形 框架 ， 还 剩 多少 米 铁丝 可以 做 正方形 框架 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16398", "content": "某 车间 有 50 名 工人 ， 车间 组织 活动 ， 参加 划船 的 有 34 人 ， 参加 游泳 的 有 28 人 ， 车间 有 多少 人 两项 活动 都 参加 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17716", "content": "东 苑 小学 有 57 个 班 ， 平均 每个 班 有 学生 55 人 ， 全校 共有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11246", "content": "六年级 参加 数学 兴趣小组 有 49 人 ， 比 写作组 人数 的 2 倍 少 1 人 ， 写作 小组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5836", "content": "学校 买 了 8 个 篮球 ， 每个 16.5 元 ， 买 了 10 个 排球 ， 每个 12.5 元 ， 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17545", "content": "修 一条 公路 ， 已修 的 是 未 修 的 60% ， 已修 840 米 ， 这 条 公路 长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18356", "content": "东湖 菜场 运 来 青鱼 865 千克 ， 运 来 的 鲢鱼 比 青鱼 的 2 倍 还 多 230 千克 ， 运 来 鲢鱼 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4016", "content": "食堂 运 来 面粉 420 千克 ， 运 来 的 大米 比 面粉 多 140 千克 ． 如果 每天 用 掉 80 千克 大米 ， 这 批 大米 够用 几天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4687", "content": "一 根 铁丝 长 15 米 ， 第一次 剪 去 全长 的 (1/3) ， 第 二 次 剪 去 (2/5) 米 ， 两次 一共 剪 去 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16741", "content": "专卖店 促销 一款 运动服 ， 打 0.85 后 每套 比 原价 便宜 30 元 ． 这 款 运动服 原价 每套 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8197", "content": "一 匹 马 重 0.45 吨 ， 一头 河马 的 重量 相当于 3 匹 马 的 重量 ， 一头 大象 的 重量 是 一头 河马 的 6 倍 ， 一头 大象 重 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21052", "content": "一 块 平行四边形 的 花生 地 ， 底 长 45 米 ， 高 18 米 ， 每平方米 种 花生 6 棵 ， 每棵 花生 的 产量 约 是 0.8 千克 ， 这块 花生 地 共 收 花生 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "10060", "content": "小 红 去 超市 买 西瓜 ， 每千克 西瓜 1.8 元 ， 小 红 付 了 30 元 ， 收银员 找回 3.9 元 ． 小 红 买 了 多少 千克 西瓜 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18855", "content": "买 一双 鞋 120 元 ， 相当于 15 双 袜子 的 价钱 ， 买 一双 鞋 比 买 一双 袜子 贵 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2084", "content": "一 个 因数 是 480 ， 另 一个 因数 是 6 ， 它们 的 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15719", "content": "学校 开展 植树造林 活动 ， 三年级 植 了 120 棵 树 ， 比 五年级 少 植 680 棵 ， 五年级 植 的 棵 数 正好 是 四年级 5 倍 ， 四年级 植 了 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8446", "content": "利民 农具厂 生产 一批 小 农具 ． 原 计划 每天 生产 240 件 ， 25 天 完成 ． 结果 提前 5 天 完成 任务 ， 平均 每天 生产 多少 件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3789", "content": "一 个 长方形 的 长 减少 1.5 米 ， 或 宽 减少 1.2 米 ， 那么 它 的 面积 就 都 减少 6 平方米 ， 这个 长方形 的 面积 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22524", "content": "一 本书 的 (2/3) 是 40 页 ， 这 本书 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19888", "content": "某 体育中心 修建 一个 长方体 游泳池 ， 长 50 m ， 宽 20 m ， 如果 将 2400 m ^ 3 的 水 放入 池 中 ， 水面 到 池底 深 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9157", "content": "欣欣 小学 有 学生 1000 人 ， 其中 在 学校 吃 午餐 的 有 900 人 ， 在校 用 午餐 的 学生 占 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7309", "content": "春辉 小学 12 个 班 去 春游 ， 每班 15 人 ， 分 坐 5 辆车 ， 平均 每辆车 坐 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3058", "content": "一 批 货物 ， 运走 了 40% ， 剩下 的 比 运走 的 多 12 吨 ， 这 批 货物 还 剩 多少 吨 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1014", "content": "一 个 新建 学校 需要 配备 15 个 教室 的 课桌椅 ． 一套 课桌椅 售价 200 元 ， 每个 教室 要 配 30 套 ， 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5363", "content": "学校 新建 了 一个 长 35 米 ， 宽 15 米 的 花坛 ， 如果 每平方米 可以 栽 18 棵 月季花 ， 这个 花坛 共 可以 栽 多少 棵 月季花 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8969", "content": "电池厂 生产 了 4800 节电池 ， 每 12 节 装 一盒 ， 每 8 盒装 一箱 ． 这 批 电池 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6748", "content": "某 印刷厂 要 将 一批 图书 打包 后 送往 书店 （ 要求 每包 书 同样 多 ） ． 工人 先 领 来 这 批 书 的 (11/18) ， 打成 了 14 包 后 还 剩 40 本 ． 然后 他们 把 余下 的 书 全部 领 来 ． 连同 第一次 剩下 的 书 一起 正好 打 了 10 包 ， 这 批 图书 共有 多少 本 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2573", "content": "某 商场 举行 店 庆 酬宾 活动 ， 所有 商品 0.8 销售 ． 李 阿姨 在 该 商场 花 480 元 钱 购买 了 一件 上衣 ． 这件 上衣 的 原价 = 多少 元 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4345", "content": "一 只 船 每 小时 行驶 12.5 千米 ， 42 小时 到达 目的地 ． 如果 每 小时 多 行驶 2.5 千米 ， 需要 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12179", "content": "一 个数 的 5 倍 是 65 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8198", "content": "一 个数 的 4 倍 再 加上 0.1 得 1.7 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11502", "content": "在 “ 送温暖 ， 献爱心 ” 活动 中 ， 3 （ 1 ） 班 的 8 名 同学 共 捐款 960 元 ， 平均 每人 捐款 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21692", "content": "甲 、 乙 两 人 同时 开始 做 机器 零件 ， 各 要 做 200 个 ， 甲 每 小时 生产 25 个 ， 当 甲 完成 任务 时 ， 乙 还 需要 2 小时 才能 完成 任务 ， 乙 每 小时 生产 多少 个 零件 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6546", "content": "我国 的 人均 土地 面积 比 世界 人均 土地 面积 少 (2/3) ． 世界 人均 土地 面积 约 (12/5) 公顷 ， 我国 的 人均 土地 面积 约 多少 公顷 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17073", "content": "文具店 原有 钢笔 140 支 ， 又 新 进 16 盒 钢笔 ， 每盒 12 支 ， 现在 文具店 有 多少 支 钢笔 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10922", "content": "小 明 有 7 张 图片 ， 小 刚 的 图片 张 数 是 小 明 的 5 倍 ． 小 刚 有 几张 图片 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7474", "content": "光明 小学 三年级 有 44 人 ， 四年级 有 52 人 ， 每 6 人 分成 一组 参加 植树 活动 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13346", "content": "公共汽车 从 起点 开出 ， 停靠 第一站 有 10 人 下车 ， 5 人 上车 ， 停靠 第 二 站 时 只有 8 人 上车 ， 停靠 第 3 站 时 ， 只有 7 人 下车 ， 这时 车上 还有 28 人 ， 车 在 起点站 开出 时 有 乘客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20128", "content": "学校 大队 部 组织 同学 们 为 军烈属 和 困难户 做好事 ， 男生 有 53 人 ， 女生 有 38 人 ， 每 7 人 编成 一个 活动 小组 ， 可以 编成 多少 个 小组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17891", "content": "一 桶 油 20 千克 ， 用 去 (4/5) ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7004", "content": "甲 、 乙 、 丙 3 人 加工 一批 零件 ， 甲 加工 了 总数 的 40% ， 乙 、 丙 加工 零件 的 个数 比 为 2 ： 3 ． 已知 丙 加工 了 360 个 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17048", "content": "六年级 办公室 买进 一包 白纸 ， 计划 每天 用 20 张 ， 可以 用 28 天 ． 由于 注意 了 节约 用纸 ， 实际 每天 只用 了 16 张 ， 实际 比 计划 多用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13149", "content": "小 玲 参加 数学 竞赛 ， 全卷 总 题 数 是 18 题 ， 小 玲 只 做 对 总 题 数 的 (8/9) ． 小 玲 做 错 了 多少 题 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12188", "content": "果园 里 有 桃树 240 棵 ， 比 梨树 少 20% ， 梨树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9270", "content": "加工 一批 零件 ， 原 计划 每天 加工 200 个 ， 18 天 完成 ． 由于 改进 技术 ， 加工 的 天数 缩短 了 (1/6) ． 实际 每天 加工 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1173", "content": "小 红 有 2 本 相册 ， 每 本 32 张 照片 ， 小 东 的 相片 是 小 红 的 3 倍 ． 小 东 有 多少 张 照片 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7291", "content": "有 18 棵 白菜 ， 每 6 棵 装 一筐 ， 需要 几个 萝筐 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19057", "content": "一 列 长 350 米 的 火车 ， 通过 一座 长 1550 米 的 隧道 ， 从 车头 开 过 隧道 到 车尾 离开 隧道 用 了 2 分钟 ， 以 同样 的 速度 要 通过 一座 4400 米 长 的 大桥 ， 需要 多少 分钟 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13250", "content": "一 项 工程 ， 预计 30 人 15 天 可以 完成 任务 ． 后来 工作 4 天 后 ， 又 增加 3 人 ． 如果 每人 的 工作效率 相同 ， 这样 可以 提前 几天 完成 任务 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "16604", "content": "一 列 火车 6 时 从 甲 站 开出 ， 17 时 到达 乙 站 ， 这 列 火车 平均 每 小时 行 85 千米 ， 甲乙 两站 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "935", "content": "弟弟 有 故事书 16 本 ， 哥哥 再 给 弟弟 2 本 ， 这时 ， 弟弟 与 哥哥 的 故事书 的 本 数 的 比 是 3 ： 5 ． 哥哥 原有 多少 本 故事书 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22965", "content": "一 双 球鞋 130 元 ， 按 0.75 出售 ， 可以 省 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8006", "content": "故事书 有 126 页 ， 王 丽 每天 看 7 页 ， 看 了 9 天 ， 还 剩 多少 页 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18305", "content": "李 叔叔 为 某 杂志社 审稿 ， 审 稿费 为 6000 元 ， 为此 他 需要 按 3% 的 税率 缴纳 个人所得税 ， 他 应 缴纳 个人所得税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16888", "content": "某 工厂 存 煤 160 吨 ， 原来 每天 烧 1.5 吨 ， 烧 了 30 天 后 ， 余下 的 每天 烧 2.5 吨 ， 还 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12194", "content": "花果山 上 的 桃 熟 了 ， 小 猴 忙 到 树上 摘 桃 ． 第一次 ， 它 摘 了 树上 桃 的 一半 ， 回家 时 还 随手 从 树上 摘 了 2 个 ； 第 二 次 ， 它 将 树上 剩下 的 8 个 桃 全部 摘 回家 ． 小 猴 共 摘 回 多少 个 桃 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7778", "content": "一 根 小 棒 锯 成 等 长 的 小 段 ， 5 次 锯 完 ， 每 段 是 这根 小 棒 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15491", "content": "一 桶 油 ， 第一次 用 去 这 桶 油 的 (1/6) ， 第 二 次 用 去 30 千克 ， 还 剩下 这 桶 油 的 (1/2) ， 这 桶 油 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13074", "content": "一 个 班 参加 数学 兴趣小组 的 人数 有 16 人 ， 占 全班 人数 的 (2/7) ． 参加 美术 小组 的 人数 是 全班 人数 的 (1/4) ， 参加 美术 小组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8809", "content": "甲 数 是 30 ， 乙 数 比 甲 数 少 (2/3) ， 乙 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7017", "content": "王 华 看 一本 240 页 的 书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 全书 的 25% ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10969", "content": "佳 味 饮料厂 生产 了 6000 瓶 优酸乳 ， 每 12 瓶装 一盒 ， 每 10 盒装 一箱 ， 这些 优酸乳 可以 装 几箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4568", "content": "某 广场 共 摆放 菊花 、 月季 与 兰花 1550 盆 ， 菊花 与 月季 的 盆 数 之 比 为 6 ： 5 ， 月季 比 兰花 多 50 盆 ， 求 兰花 多少 盆 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1379", "content": "比 8 的 6 倍 多 25 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "352", "content": "市场 上 某种 品牌 的 笔记本电脑 刚 上市 时 8000 元 ， 现在 降低 了 40% ． 现在 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15105", "content": "小 红 家 今年 养 了 4 箱 蜜蜂 ， 共 收 蜂蜜 380 千克 ， 去年 平均 每箱 收 蜂蜜 84 千克 ． 今年 每箱 平均 产 蜜 量 比 去年 高 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4362", "content": "一 箱 花生 牛奶 有 24 瓶 ， 每箱 售价 48 元 ， 芳 芳 要 买 5 瓶 ， 需要 付 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21526", "content": "学校 田径队 有 12 人 ， 轮滑 队 人数 是 田径队 的 (5/6) ， 同时 又 是 足球队 人数 的 (5/11) ． 学校 足球队 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18372", "content": "甲队 运货 40 吨 ， 比 乙 队 少 4.2 吨 ， 丙 队 比 乙 队 多 运 3.82 吨 ， 丙 队 运货 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8456", "content": "在 一次 激烈 的 战争 中 ， 有 100 名 士兵 参战 ， 其中 70 名 失去 了 一只 眼睛 ； 75 名 失去 了 一只 耳朵 ； 80 名 士兵 失去 了 一只 手 ； 85 名 失去 了 一只 脚 ． 问 ： 同时 失去 了 一只 眼睛 ， 一只 耳朵 ， 一只 手 ， 一只 脚 的 士兵 至少 有 多少 个 ．", "knowledge": ["+", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "21166", "content": "甲 、 乙 两地 相距 500 米 ， 从头到尾 一共 栽 了 51 棵 树 ， 平均 每 两棵树 之间 的 距离 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15171", "content": "一 本 故事书 ， 每天 读 24 页 ， 25 天 可 读完 ． 如果 每天 多 读 6 页 ， 几天 可 读完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15175", "content": "学校 准备 为 多媒体 教室 铺 装 地板 ， 多媒体 教室 长 30.5 米 ， 宽 9.6 米 ． 地板 的 价格 是 每平方米 120 元 ． 多媒体 教室 地板 大约 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18820", "content": "一 本 小说 分 上下 两册 ， 下册 为 154 页 ， 上册 的 (1/3) 比 下册 的 (3/7) 少 5 页 ， 求 上册 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16843", "content": "一 本书 b 页 ， 打字员 每天 打 9 页 ， 打 了 5 天 ， 还 剩 多少 页 没有 打 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6524", "content": "甲乙 两队 合 修 一条 路 ， 甲队 完成 全长 的 62% ， 比 乙 队 多 修 360 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17952", "content": "食品店 以 每 只 1.6 元 的 价格 购进 一批 面包 ， 然后 按照 每 只 2.5 元 售出 ， 当 还 剩下 80 只 没 售完 时 ， 已 全部 收回 了 成本 ， 还 获得 250 元 的 利润 ， 这 批 面包 共 多少 只 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19371", "content": "瑞金 林场 去年 植树 1600 棵 ， 超过 了 计划 的 (1/7) ， 今年 3 月 12 日 植树 又 比 去年 计划 植树 多 (5/7) ． 这个 林场 今年 计划 植树 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5643", "content": "4 吨 水 ， 用 去 (3/5) 吨 ， 剩 多少 吨 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8990", "content": "一 个数 的 20% 是 100 ， 这个 数 的 (3/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6097", "content": "绘画 比赛 中共 有 120 名 学生 获奖 ， 其中 获 一等奖 的 人数 比 获奖 总 人数 的 30% 还 多 2 人 ， 获 一等奖 的 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11402", "content": "一 根 竹杆 长 8.6 米 ， 竖直 插入 河里 后 ， 插入 淤泥 里 的 部分 长 1.2 米 ， 河 水深 2.8 米 ， 露出 河面 的 部分 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4175", "content": "商店 里 有 梨 390 千克 ， 苹果 比 梨 少 40% ． 商店 里 有 苹果 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10950", "content": "37.5 * 3 * 0.112 + 35.5 * 12.5 * 0.224 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "9495", "content": "一 辆 汽车 行 40 千米 用 了 (2/5) 小时 ， 平均 一 小时 行 名 少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21923", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 (3/8) ， 正好 行 了 81 千米 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22216", "content": "一 次 数学考试 后 ， 李 军 问 于 昆 数学考试 得 多少 分 ． 于 昆 说 ： “ 用 我 得 的 分数 减去 8 + 10 ， 再 除以 7 ， 最后 乘以 4 ， 得 56 ． ” 小朋友 ， 你 知道 于 昆 得 多少 分 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19831", "content": "某 厂 今年 生产 产品 36000 件 ， 比 去年 增产 了 (1/4) ， 去年 生产 了 多少 件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "537", "content": "甲 、 乙 两 人 绕 周长 1000 米 的 环形 广场 竞走 ， 已知 甲 每分钟 走 125 米 ， 乙 的 速度 是 甲 的 2 倍 ． 现在 甲 在 乙 后面 250 米 ， 乙 追 上 甲 需要 多少 分钟 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15001", "content": "一 头羊 重 75 千克 ， 一头 牛 的 重量 比 一头 羊 的 9 倍 还 多 25 千克 ， 这 头牛 有 多重 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16078", "content": "在 一条 环行 公路 上 ， 甲乙 两车 在 同一 车站 先后 相 背 开出 ， 甲 车 每 小时 行 40 千米 ， 乙 车 每 小时 行 38 千米 ， 甲 车 开出 1.5 小时 后 ， 乙 车 开出 ， 经过 2.5 小时 ， 两车 在 途中 相遇 ， 这 条 环行 公路 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "3211", "content": "小 红 有 邮票 43 张 ， 小 文 的 邮票 数 是 小 红 的 3 倍 少 6 张 ， 小 文 有 多少 张 邮票 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5870", "content": "1057 比 846 多 多少 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9277", "content": "已知 一个 数 的 50% 是 80 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14811", "content": "妈妈 带 900 元 去 买 上衣 ， 买 了 12 件 ， 还 剩 72 元 ， 每件 上衣 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7336", "content": "一 个数 的 1.2 倍 是 8.4 ， 这个 数 的 2 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13520", "content": "光明 村 今年 比 去年 多 植树 (2/9) ， 今年 植树 220 棵 ， 去年 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13314", "content": "某 地区 有 土地 520 平方千米 ， 其中 沙漠 荒地 20 平方千米 ， 由于 该 地区 的 乱砍滥伐 ， 该 地区 以 每年 4 平方千米 的 速度 沙漠化 ， 如 不 加 治理 ， 8 年 后 该 地区 沙漠化 地带 占 整个 地区 的 百分数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22055", "content": "副食店 运 来 410 千克 鸡蛋 ， 上午 卖出 152 千克 ， 下午 卖出 174 千克 ， 还 剩 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23049", "content": "计算 （ 58 + 16 ） - 24 / 6 时 ， 应 先 算 多少 法 ， 再 算 多少 法 ， 最后 算 多少 法 ， 结果 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6860", "content": "计算 ： 12.34 * 56.78 + 876.6 * 5.678 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13684", "content": "六年级 一班 有 男生 24 人 ， 女生 21 人 ， 全班学生 占 全校学生 总数 的 (3/16) ． 全校学生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8968", "content": "一 件 上衣 降价 20% 后 ， 售价 为 96 元 ， 这件 上衣 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19017", "content": "明明 的 爸爸 成功 地 为 工厂 设计 出 一条 新 的 生产线 ， 为此 工厂 给 他 奖励 9000 元 ， 按 国家 税收政策 规定 ， 个人 一次性 收入 超过 3500 元 部分 按 (1/5) 缴纳 个人所得税 ． 这次 明明 爸爸 实际 所得 的 奖金 金额 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20306", "content": "某 化工厂 3 月份 生产 化肥 1280 吨 ， 比 计划 少 生产 320 吨 ， 完成 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10426", "content": "果园 里 有 38 棵 梨树 ， 桃树 比 梨树 多 23 棵 ， 苹果树 的 棵 数 等于 梨树 和 桃树 总 棵 树 的 2 倍 ． 有 苹果树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15743", "content": "林 玲 同学 练习 竞走 ， 开始 时 她 每分钟 走 30 米 ， 从 第 4 分钟 起 ， 她 开始 加速 ， 每分钟 都 比 前 一分钟 多 走 3 米 ， 则 到 第 5 分钟 后 ， 她 一共 走 了 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "228", "content": "一 个数 乘 0.5 的 积 是 0.86 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15570", "content": "京广中心 大厦 是 北京市 目前 最高 的 摩天大楼 ， 高 210 米 ， 它 比 中央 电视塔 约 矮 (14/29) ． 你 知道 中央 电视塔 有 多 高 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12135", "content": "李 力 要 写 62 个 大字 ， 已经 写 好 了 14 个 ， 如果 他 每分钟 能 写 8 个 ， 还要 几分钟 写 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8093", "content": "小 岗 计划 4 天 做 15 道 数学题 ， 结果 多 做 了 9 道 ． 平均 每天 做 了 多少 道 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16443", "content": "一 个 平行四边形 的 面积 是 125 cm ^ 2 ， 底 是 25 cm ， 高 = 多少 cm ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14072", "content": "学校 要 买 不同 档次 的 文具盒 作为 奖品 ， 其中 高档 的 5 个 ， 低档 的 占 总数 的 75% ， 中档 的 占 总数 的 (1/6) ． 学校 一共 要 买 多少 个 文具盒 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15169", "content": "奶奶 服用 一种 降血脂 药 ． 每次 服用 25 克 ， 每天 服用 3 次 ． 现在 奶奶 的 这种 药 还有 450 克 ， 她 能 服用 几天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7156", "content": "一 个 三角形 的 面积 为 176 m ^ 2 ， 底 是 22 m ， 它 的 高 = 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14151", "content": "图书馆 有 故事书 7260 本 ， 是 文艺 书 的 6 倍 ， 文艺 书 有 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13688", "content": "一 本 故事书 有 72 页 ， 小 红 看 了 2 天 ， 还 剩下 8 页 ， 小 红 看 了 多少 页 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18528", "content": "一 只 兔子 每 小时 跑 41 千米 ， 一只 雨燕 的 飞行速度 是 一只 兔子 的 4 倍 ． 这 只 雨燕 每 小时 大约 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "967", "content": "20 克 盐 溶解 在 80 克 水中 ， 盐 占 盐水 的 多少 ． （ 填 分数 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3369", "content": "一 辆 童车 的 价钱 是 126 元 ． 星星 幼儿园 买 回 4 辆 这样 的 童车 ， 一共 要 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21243", "content": "王 大伯 今年 收 玉米 2800 千克 ， 大豆 是 玉米 的 (3/7) ， 同时 又 是 花生 的 (6/7) ． 王 大伯 今年 收获 花生 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12363", "content": "王 刚 家 买 了 一 套房 ， 交纳 了 1.5% 的 契税 ， 一 共用 了 81.2 万元 ． 这 套房 价值 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8743", "content": "在 正方形 毛巾 上 绣花 ， 4 个 顶点 上 各 有 1 朵 ， 每 边 都 有 6 朵 ． 这 条 毛巾 4 周一 共 绣 了 多少 朵花 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5370", "content": "一 只 东北虎 重 215 千克 ， 一头 野牛 的 体重 比 东北虎 的 3 倍 少 38 千克 ． 这 头 野牛 重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16961", "content": "迎春 农机厂 计划 生产 一批 插秧机 ， 现已 完成 计划 的 68% ， 如果 再生产 5000 台 ， 总产量 就 超过 计划 产量 的 18% ． 那么 ， 原 计划 生产 插秧机 多少 台 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15235", "content": "希望 小学 六年级 有 男生 79 人 ， 女生 83 人 ， 五年级 人数 是 六年级 的 (7/9) ， 五年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5411", "content": "一 个 正方形 的 边长 是 2.4 米 ， 这个 正方形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5315", "content": "小 红 回家 ， 距 家门 30 米 ， 妹妹 和 小狗 一起 向 她 奔 来 ， 小 红 和 妹妹 的 速度 都 是 每分钟 50 米 ， 小狗 的 速度 是 每分钟 200 米 ， 小狗 遇到 小 红 后 用 相同 的 速度 往返 于 小 红 与 妹妹 之间 ， 当 小 红 与 妹妹 相距 10 米 时 ， 小狗 一共 跑 了 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7700", "content": "修 一条 路 ， 每天 修 这 条 路 的 (1/8) ， 多少 天 可以 修 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20484", "content": "甲乙 两 数 的 和 是 24 ， 甲 与 乙 的 比 是 3 ： 5 ， 甲 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9854", "content": "150 与 25 的 差 乘 8 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11891", "content": "一 瓶 酱油 ， 已 用 去 (3/10) ， 用 去 了 (3/4) 升 ， 这 瓶 酱油 原来 有 多少 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5096", "content": "李 阿姨 买 了 2 副 同样 的 乒乓球拍 ， 付出 70 元 ， 找回 16 元 ． 每付 乒乓球拍 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1981", "content": "乐天 影院 正在 放映 一部 最新 电影 ， 原来 电影票 20 元 一张 ． 现在 降价 ， 观众 增加 一 倍 ， 收入 增加 了 (1/5) ． 门票 现在 多少 元 一张 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "10844", "content": "李老师 发表 一篇 文章 ， 稿费 是 500 元 ． 为此 她 要 按 3% 的 税率 缴纳 个人所得税 ． 她 应 缴税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22122", "content": "职工 技术学校 原有 科技 书 、 文艺 书 630 本 ， 其中 科技 书 占 20% ， 后来 又 买进 一些 科技 书 ， 这时 科技 书 占 总数 的 30% ， 又 买来 科技 书 多少 本 ？ （ 列式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9181", "content": "同学 们 进行 跳远 比赛 ． 冬冬 跳 了 3.16 米 ， 亮 亮 比 冬冬 多 跳 0.23 米 ， 强强 比 亮 亮 少 跳 0.18 米 ， 强强 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18743", "content": "书店 运 来 《 科幻 故事 》 书 560 册 ， 第一天 卖出 总数 的 (2/7) ， 这时 还 剩 多少 册 未 卖出 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18438", "content": "明明 看 一本 200 页 的 书 ， 5 天 看 了 全书 的 25% ． 照 这样 计算 ， 几天 能 看 完全 书 ？ 多少 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "214", "content": "两个 车间 装配 电视机 ． 第一 车间 每天 装配 35 台 ， 第 二 车间 每天 装配 37 台 ． 照 这样 计算 ， 这 两个 车间 15 天 一共 可以 装配 电视机 多少 台 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12769", "content": "一 座 大桥 长 2400 米 ， 一列 火车 以 每分钟 900 米 的 速度 通过 大桥 ， 从 车头 开 上 桥 至 车尾 离开 桥 共 需要 3 分钟 ， 这 列 火车 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11203", "content": "动物园 上午 有 游客 230 人 ， 下午 游客 比 上午 少 25 人 ， 这 一天 一共 有 游客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20576", "content": "服装厂 用 一匹 布 做 校服 ， 当 用 去 这些 布 的 (4/5) 时 ， 刚好 做 了 120 套 校服 ． 这 匹 布 一共 可以 做 多少 套 这样 的 校服 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16562", "content": "一 种 彩电 ， 原价 每 台 3000 元 ， 现在 价格 降低 了 600 元 ， 降低 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "364", "content": "学校 举行 动手 能力 大赛 ， 其中 有 一项 给 绳子 打结 的 比赛 ， 在 一条 长 20 米 的 绳子 上 ， 每隔 2 米 打 一个 结 ， 两端 不 打结 ， 一共 应 打 多少 个 结 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10449", "content": "小影 乘客 车 从 家 去往 外省 的 外婆家 ， 去 时 时速 66 千米 ， 52 小时 到达 ． 来时 乘坐 特快 列车 33 小时 到达 ， 请问 列车 时速 多少 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12891", "content": "3 筐 苹果 的 价钱 等于 4 筐 梨 的 价钱 ， 一筐 梨 60 元 ， 一筐 苹果 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12448", "content": "甲 数 扩大 10 倍 等于 乙 数 ， 甲 、 乙 的 和 是 33 ， 则 甲 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2213", "content": "两辆 汽车 同时 从 一个 收费站 出发 向 同一 地点 开车 ， 客车 每 小时 行 84 千米 ， 货车 每 小时 行 68 千米 ， 4 小时 后 ， 货车 与 客车 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3898", "content": "学校 图书室 友 连环画 150 本 ， 是 科技 书本 数 的 (3/4) ， 故事书 的 本 数 是 科技 书 的 (9/5) ． 图书室 里 有 故事书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21434", "content": "星星 农庄 今年 秋季 喜获丰收 ， 果园 里 收 苹果 24.2 吨 ， 比 收 的 梨 80% 还 多 0.2 吨 ， 收 梨 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1399", "content": "中山 小学 五年级 学生 一周 要 上 6 节 语文课 ， 占 总 课 数 的 (1/5) ， 音乐课 占 总 课 数 的 (1/15) 他们 一周 要 上 几节 音乐课 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16301", "content": "有 28 个 小朋友 排成 一路 纵队 ， 每 2 个 小朋友 之间 相距 1 米 ． 这 路 纵队 全长 大约 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6684", "content": "某 玩具厂 计划 30 天 生产 玩具 840 套 ， 实际 24 天 就 完成 了 ， 实际 比 计划 每天 多 生产 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1851", "content": "甲 乙丙 3 个人 都 做 同样 的 零件 20 个 ， 同时 开始 做 ， 甲 做 完 时 ， 乙 做 了 15 个 ， 丙 做 了 12 个 ， 乙 做 完 时 丙 还有 多少 个 没 做 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5603", "content": "圆规 两 脚 之间 的 距离 是 1 cm ， 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "3661", "content": "5292 / 36 的 商 ， 乘 1370 与 1080 的 差 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17714", "content": "学校 图书馆 有 180 本书 ， 借 走 了 108 本 ， 剩下 的 平均 分给 8 个 班 ， 每个 班 能 分 到 几本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20026", "content": "小 明 家 到 学校 有 550 米 ． 他 每天 上学 大约 走 10 分钟 ， 他 每分钟 大约 走 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2072", "content": "已知 两个 数 相除 的 商 是 5.3 ， 除数 是 4 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23055", "content": "学校 有 100 张 彩色纸 ， 其中 用 25 张 做 小花 ， 用 32 张 做 小旗 ， 其余 的 用来 扎 彩球 ， 扎 彩球 要 用 多少 张 彩色纸 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5940", "content": "某 车间 要 生产 一批 零件 ， 原 计划 每天 生产 250 个 ， 12 天 完成 ， 现在 要 提前 2 天 完成 ， 平均 每天 生产 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19670", "content": "小 红 前面 5 人 ， 后面 7 人 ， 一共 有 多少 人 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5410", "content": "超市 一种 服装 打 0.9 后 的 售价 是 135 元 ， 这种 服装 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2243", "content": "一 件 衣服 售价 180 元 ， 比 原价 降低 了 25% ． 这件 衣服 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3727", "content": "《 大百科全书 》 原价 每套 500 元 ， 现 实行 0.85 优惠 后 ， 每套 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21904", "content": "小强 的 爸爸 拿出 一个月 工资 的 (1/5) ， 正好 买 了 4 张 单价 是 80 元 的 椅子 ． 小强 的 爸爸 一个月 的 工资 = 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12734", "content": "学校 图书室 有 科技 书 420 本 ， 比 文艺 书 少 (2/5) ， 学校 图书室 有 文艺 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20175", "content": "一 个 小 正方体 的 棱 长 是 2 厘米 ， 把 3 个 这样 的 小 正方体 合成 一个 长方体 ， 这个 长方体 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "416", "content": "粮库 要 运走 一批 面粉 ， 先 用 小 卡车 运 ， 每辆车 每次 运 5 吨 ， 运 了 7 次 ， 剩下 125 吨 面粉 用 大卡车 来 运 ， 这 批 面粉 共有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17062", "content": "6 （ 1 ） 班 学生 进行 视力 测试 ， 近视 率 是 28% ， 不 近视 的 人数 比 近视 的 多 22 人 ． 这个 班 共有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2449", "content": "一 套 衣服 按 其 原价 的 85% 出售 可 便宜 45 元 ， 买 这样 一套 衣服 原来 要 付 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18208", "content": "309 是 3 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6789", "content": "客车 和 货车 同时 从 甲 、 乙 两地 相向 而 行 ， 客车 每 小时 行 50.6 千米 ， 货车 每 小时 行 48.8 千米 ， 4.5 小时 相遇 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19850", "content": "江 欣 造纸 有限公司 今年 实际 生产 纸张 60 万吨 ， 比 原 计划 多 生产 了 20% ． 实际 比 原 计划 多 生产 了 多少 万吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1909", "content": "水果店 运 来 120 千克 苹果 ， 比 运 来 的 梨 少 了 (1/6) ． 水果店 运 来 多少 千克 梨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "586", "content": "2010 年 4 月 14 日 ， 我国 青海 玉树县 发生 了 7.1 级 的 大 地震 ． 实验 小学 6 个 年级 的 师生 自发 捐款 共 3701.2 元 ， 其中 老师 捐款 1600 元 ， 平均 每个 年级 的 学生 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9773", "content": "阿姨 从 12 只 蚌 里 剖 出 了 432 颗 珍珠 ， 照 这样 计算 ， 她 从 26 只 蚌 里 可以 剖 出 珍珠 多少 颗 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21062", "content": "玩具厂 计划 生产 游戏机 2000 台 ， 实际 超额完成 (1/10) ， 实际 生产 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18862", "content": "一 堆 沙 ， 运走 了 它 的 (3/8) ， 正好 是 24 吨 ， 这 堆 沙 有 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16943", "content": "甲乙 两个 袋子 的 大米 质量 相等 ． 如果 从 甲 袋子 取出 5 千克 ， 乙 袋子 加入 7 千克 ， 这时 乙 袋 的 大米 是 甲 袋 的 4 倍 ， 甲 袋 原有 多少 千克 大米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "962", "content": "舞蹈队 女生 有 25 人 ， 男生 有 15 人 ． 合唱队 的 人数 是 舞蹈队 的 3 倍 ． 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18853", "content": "小 红 徒步 行走 2 km ， 每 (1/5) km 处 有 一个 标志 ， 小 红 走 到 第 5 个 标志 时 ， 正好 步行 了 多少 km ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13461", "content": "三年级 有 4 个 班 ， 平均 每班 有 45 名 学生 ， 每人 买 2 本 作业本 ， 一共 要 买 多少 本 作业本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15673", "content": "小 丽 家 离 学校 有 (8/10) 千米 ， 她 每天 要 步行 (1/4) 小时 到 学校 ． 小 丽 平均 每 小时 步行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22862", "content": "某 工程队 计划 100 人 90 天 完成 一项 工程 ， 按计划 工作 15 天 后 ， 由于 采用 了 先进 的 技术 ， 每个 人 的 工作效率 都 可 提高 50% ， 完成 这项 工程 可 提前 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "23142", "content": "体育馆 路 小学 六年级 有 268 人 ， 计划 每人 植树 4 棵 ， 因 有事 调 走 了 60 人 ， 共 植树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9353", "content": "商店 有 一种 衣服 ， 售价 96 元 ， 比 原来 定价 便宜 25% ． 现在 的 售价 比 原来 定价 便宜 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1826", "content": "1991 + 8119 + 8009 + 1881 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2680", "content": "甲 桶 里 有 油 470 千克 ， 乙 桶 里 有 油 190 千克 ， 甲 桶 的 油 倒入 乙 桶 多少 千克 ， 才能 使 甲 桶 油 是 乙 桶 油 的 2 倍 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20204", "content": "师傅 每 小时 生产 零件 64 个 ， 徒弟 每 小时 生产 零件 48 个 ， 师傅 3 小时 生产 的 零件 ， 徒弟 要 几小时 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6153", "content": "一 个数 的 (3/4) 是 (3/8) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6191", "content": "爷爷 对 小胖 说 ： 你 今年 的 年龄 的 8 倍 再 减去 11 ， 就是 我 去年 的 年龄 ， 已知 爷爷 今年 的 年龄 是 62 岁 ， 小胖 今年 多少岁 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14225", "content": "7 / 1750 的 商 与 124 的 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11838", "content": "某 鱼 场 第一次 捕鱼 843 千克 ， 第 二 次 捕鱼 348 千克 ， 每千克 售价 4 元 ， 这些 鱼 共 可 卖 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11513", "content": "文文 周日 到 游乐 宫 ， 上坡 用 了 7 分钟 ， 共 走 了 336 米 ； 下坡 用 了 9 分钟 ， 平均 每分钟 走 64 米 ． 文文 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19246", "content": "某校 要 在 100 米 长 的 校 道旁 种 21 棵 棕树 （ 两端 必须 种 一棵 ） ， 每 两棵 棕树 的 间隔 应 = 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14253", "content": "希望 小学 2005 年 有 50 名 学生 得到 了 捐赠 的 电脑 ， 占 全校学生 总数 的 (1/4) ． 希望 小学 共有 学生 多少 名 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1342", "content": "一 辆 汽车 以 每 小时 60 千米 的 速度 从 甲地 开往 乙地 ， 用 了 12 小时 ， 返回 时 只用 9 小时 ， 这辆 汽车 返回 时 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9848", "content": "12 米 的 (4/3) = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5519", "content": "足球 上 共有 白色 皮 20 块 ， 比 黑色 皮 的 2 倍 少 4 块 ． 共有 黑色 皮 多少 块 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15413", "content": "元旦 期间 某 商场 卖出 女式 羽绒服 327 件 ， 儿童 羽绒服 136 件 ． 卖出 的 男式 羽绒服 比 上面 两种 羽绒服 的 总数 少 118 件 ， 卖出 男式 羽绒服 多少 件 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17876", "content": "修路 队 修 一条 公路 ， 已修 了 (2/5) ， 正好 是 40 千米 ， 这 条 公路 全长 有 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1568", "content": "爸爸 的 年龄 减去 7 ， 乘以 3 ， 加上 1 是 100 ， 爸爸 今年 多少岁 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11629", "content": "计算 ： 16 * 76.1 + 41 * 7.61 + 201 * 2.39 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "21022", "content": "学校 图书馆 买来 科技 书 250 本 ， 买来 的 故事书 比 科技 书 少 (2/5) ， 买来 的 故事书 比 科技 书 少 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5179", "content": "两地 相距 760 km ， 甲 、 乙 两车 同时 从 两地 相对 开出 ， 5 小时 相遇 ． 已知 甲 车 每 小时 行 88 千米 ， 求 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17722", "content": "李 刚 家 要 栽种 一批 树苗 ， 这种 树苗 的 成活率 一般 为 80% - 85% ， 如果 要 栽 活 2000 棵 树苗 ， 那么 至少 应 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10524", "content": "某 厂 4 月份 计划 生产 洗衣机 4000 台 ， 实际 超产 1000 台 ． 超产 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17890", "content": "工人 叔叔 要 把 一根 10 m 长 的 钢管 锯 成 同样 长 的 小 段 ， 共 锯 了 4 次 ， 每 段 的 长 是 这根 钢管 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2857", "content": "一 本 小说 320 页 ， 李 红 第一天 看 了 全书 的 (1/8) ， 第 二 天 比 第一天 少 看 了 5 页 ， 还 剩 多少 页 没有 看 ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "2485", "content": "一 根 铁丝 ， 剪 去 2.5 米 后 ， 剩下 的 比 剪 去 的 3 倍 少 1.5 米 ？ 这根 铁丝 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1798", "content": "甲乙 两辆 汽车 从 两地 相对 开出 ， 甲 车 每 小时 行 85 千米 ， 乙 车 每 小时 行 75 千米 ， 两车 出发 后 4.8 小时 相遇 ． 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20221", "content": "某 修路 队 需要 修 一段 公路 ， 第一天 修 了 (1/5) 千米 ， 第 二 天 修 了 (3/10) 千米 ， 两天 正好 修 了 这 段 公路 的 (1/7) ， 这 段 公路 长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4886", "content": "商店 运 来 一批 蔬菜 ， 黄瓜 占 总数 的 (4/15) ， 西红柿 占 总数 的 (2/5) ， 其它 的 是 土豆 ， 土豆 占 这 批 蔬菜 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3864", "content": "一 列 火车 长 600 米 ， 它 以 每秒 10 米 的 速度 穿过 长 200 米 的 隧道 ， 从 车头 进入 隧道 到 车尾 离开 隧道 共 需 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18444", "content": "学校食堂 要 买 330 个 碗 每个 要 4 元 ， 超市 正在 举办 优惠 促销 ， 每 买 10 个 送 一个 同样 的 碗 ． 这样 学校 在 优惠期 购买 碗 ， 可比 平时 便宜 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "679", "content": "甲 、 乙 两 人 在 500 米 长 的 环形 跑道 上 跑步 ． 甲 以 每分钟 300 米 的 速度 从 起点 跑 出 1 分钟 时 ， 乙 从 起点 同 向 跑 出 ， 从这时起 甲 用 了 5 分钟 赶上 乙 ． 问 ： 乙 每分钟 跑 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4546", "content": "妈妈 买 了 一个 大 面包 ， 重 190 克 ， 还 买 了 4 个 小面包 ， 每个 重 50 克 ． 这些 面包 共 重 多少 克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18845", "content": "一 本词典 15 元 ， 小 红 带 了 200 元 ， 买 了 9 本 ， 还 剩 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1228", "content": "李师傅 6 小时 加工 240 个 零件 ． 照 这样 计算 ， 再 加工 2 小时 ， 一共 可以 加工 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3508", "content": "参观 科技馆 的 成人 人数 是 儿童 人数 的 2 倍 ， 如果 一共 有 456 人 参观 ， 其中 儿童 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21241", "content": "生产 小组 生产 一批 零件 ， 原 计划 用 14 天 ， 平均 每天 加工 1500 个 零件 ， 实际 每天 加工 的 零件 比 原 计划 的 多 (2/5) ． 实际 用 了 多少 天 就 完成 了 这 批 加工 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16931", "content": "修 一条 路 ， 修 了 5 天 ， 这时 已修 的 是 未 修 的 3 倍 ， 已修 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3118", "content": "同 一种 电扇 ， 商店 上午 卖出 25 台 ， 下午 卖出 30 台 ， 每 台 电扇 的 价格 是 163 元 ． 电扇 一共 卖 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9542", "content": "商店 运 来 苹果 和 梨 各 12 筐 ， 共 1080 千克 ， 已知 苹果 每 筐 重 48 千克 ， 梨 每 筐 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13425", "content": "小 亮 家 的 鸡 一天 生 了 15 个 鸡蛋 ， 一共 重 (3/4) 千克 ， 平均 每个 鸡蛋 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10581", "content": "今年 5 月份 ， 实验 小学 派出 192 名 同学 组成 4 个 方队 参加 了 庆 5 一 演出 活动 ， 平均 每个 方队 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21552", "content": "多少 / 700 = 23 … 300 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4594", "content": "商店 运 来 40 箱 单衣 ， 每箱 25 套 ， 卖出 185 套 后 ， 还 剩 多少 套 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "388", "content": "一 个 因数 是 6 ， 另 一个 因数 是 8 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16872", "content": "养殖场 有 鸡 3200 只 ， 第一周 卖出 (3/8) ， 第 二 周 卖出 (2/5) ． 两周 一共 卖出 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3800", "content": "学校 图书室 故事书 比 科技 书本 数多 (1/4) ， 故事书 有 600 本 ， 科技 书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18401", "content": "小 明 用 140 元 买 了 一台 语言 复读机 ， 买 的 时候 ， 就是 打 了 0.7 ， 这 台 语言 复读机 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17156", "content": "星星 食堂 买来 大米 50 千克 ， 比 面粉 的 (3/4) 还 少 10 千克 ， 买来 面粉 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19531", "content": "某 机关 原来 有 工作人员 160 人 ， 现在 有 工作人员 120 人 ， 现在 工作人员 比 原来 工作人员 精简 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14512", "content": "小 明 的 妈妈 带 100 元 钱 去 粮站 买 东西 ， 买 油 用 去 38.2 元 ， 买 米 用 去 44.5 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21282", "content": "一 件 上衣 0.85 之后 需要 102 元 ， 降价 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5014", "content": "某 小学 有 教师 105 人 ， 其中 女 教师 比 男 教师 人数 的 3 倍 还 多 5 人 ， 这 所 小学 有 男 教师 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5043", "content": "新 修 一条 公路 ， 已经 完成 64 千米 ， 剩下 的 比 完成 的 3 倍 少 25 千米 ． 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22187", "content": "小 明 的 体重 比 小强 轻 (1/5) ， 小 明 的 体重 是 小强 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20544", "content": "某 工程 原 计划 需要 80 万元 ， 实际 用 了 60 万元 ， 实际 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21963", "content": "5 年 二 班 有 50 人 ， 昨天 的 出勤率 是 98% ， 昨天 上学 的 学生 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15924", "content": "两座 大楼 之间 相距 168 米 ， 管理处 要 在 两座 楼房 之间 的 小路 的 一边 栽树 ， 相邻 两棵树 之间 的 距离 是 6 米 ． 一共 要 栽 多少 棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10261", "content": "妈妈 买 回 一盒 巧克力 ， 小 华 吃 了 (3/8) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9030", "content": "爸爸 骑 摩托车 去 上班 ， 每 小时 行 50 千米 ， (3/10) 小时 到达 单位 ， 如果 他 改 骑 自行车 ， 则 沿 原 路 到达 单位 需 (5/7) 小时 ， 爸爸 骑 自行车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9821", "content": "一 件 商品 标价 为 150 元 ， 打 0.8 销售 仍 可以 获利 20% ， 则 这件 商品 的 进价 为 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9285", "content": "一 桶 农药 ， 第一次 取出 34 千克 ， 第 二 次 取出 (5/12) ， 还 剩 30% ， 这 批 农药 原来 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21159", "content": "探索 ： 把 一根 木料 锯 成 9 段 要 20 分钟 ， 同样 速度 锯 成 18 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16157", "content": "某 苹果电脑 加工厂 去年 生产 ipad 平板 电脑 85000 台 ， 今年 比 去年 增产 10% ． 今年 生产 ipad 平板 电脑 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11341", "content": "周日 ， 小 丽 家 来 客人 了 ， 为了 迎接 客人 ， 爸爸 叫 小 丽 到 市场 采购 水果 ， 有 一种 香蕉 叫 “ 小米 蕉 ” 每千克 卖 19.6 元 ， 小 丽 一共 买 了 2 千克 ． 小 丽 算了 一下 ， 如果 用 这些 钱 买 橙子 ， 可 买 5 千克 ． 你 知道 每千克 橙子 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19490", "content": "某 品牌 彩电 降价 20% 后 ， 由于 出口量 增加 ， 现在 想 恢复 原价 ， 则 价格 应 提高 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10412", "content": "学校 要 为 每班 配备 一个 排球 和 一个 篮球 ， 每个 排球 38 元 ， 每个 篮球 42 元 ， 全校 有 36 个 班 ， 共 需 多少 经费 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10248", "content": "有 一堆 煤 ， 一辆 汽车 每天 运走 (7/10) 吨 ， 运 了 10 天 后 ， 还 剩下 (5/10) 吨 ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16047", "content": "一 辆 汽车轮胎 的 外 直径 是 1.5 米 ， 如果 平均 每秒 转 5 圈 ， 那么 通过 一座 长 942 米 的 大桥 ， 需要 多少 秒 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5557", "content": "小 明 的 体重 是 24 千克 ， 正好 是 爸爸 体重 的 (3/8) ， 爸爸 体重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12773", "content": "一 根 钢管 锯 成 2 段 需要 (2/5) 分钟 ， 如果 锯 成 5 段 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10184", "content": "书架上 有 4 本 不同 的 科技 书 和 5 本 不同 的 文艺 书 ， 张 萌 想 借 两本 不同 类 的 书 ， 共有 多少 种 不同 的 借 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11505", "content": "叮当 童装 厂 做 童装 ， 第一批 做 了 48 套 ， 第 二 批 做 的 套数 是 第一批 的 1.5 倍 ， 两批 一共 做 多少 套 童装 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23015", "content": "291 - 13.5 与 6 的 积 ， 所得 的 差 除以 4.2 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9538", "content": "今年 甲 的 年龄 是 乙 的 (5/6) ， 乙 的 年龄 是 丙 的 (3/4) ， 甲 的 年龄 比 丙 小 15 岁 ， 今年 甲 = 多少岁 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1944", "content": "刚 开业 的 普 码 特 超市 ， 招聘 男 营业员 5 人 ， 占 全 超市 营业员 人数 的 (5/16) ， 问 这个 超市 招聘 女 营业员 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17810", "content": "一 列 从 汕头 开往 广州 的 火车 ， 途中 到达 惠州 时 有 (2/9) 的 旅客 下车 ， 又 有 126 人 上车 ， 这时 车上 的 旅客 是 原来 的 (17/18) ， 问 在 汕头 开车 时 有 旅客 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15942", "content": "某 养鸡场 去年 养鸡 3500 只 ， 今年 比 去年 增加 30% ， 今年 养鸡 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8374", "content": "甲 、 乙 两 村 共同 修 一条 水渠 ， 修 了 8 天才 修 完 ． 甲 村 修 了 480 米 ， 乙 村 修 了 360 米 ． 甲 村 平均 每天 比 乙 村 多 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5401", "content": "学校 图书馆 原有 文艺 书 和 科技 书 共 5400 本 ， 其中 科技 书 比 文艺 书 少 20% ， 最近 又 买来 一批 科技 书 ， 这时 科技 书 和 文艺 书 的 本 数 的 比 是 9 ： 10 ， 图书馆 买来 科技 书 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "17296", "content": "300 平均 分成 20 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8987", "content": "光明 村 今年 每 百户 拥有 彩电 120 台 ， 比 去年 增加 40 台 ， 比 去年 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19527", "content": "学校 买 324 盒 水彩笔 ， 每盒 有 12 枝 ， 发给 绘画 比赛 中 获奖 的 36 名 同学 ， 平均 每位 同学 得到 多少 枝 水彩笔 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2372", "content": "学校 图书室 买来 科技 书 和 故事书 的 比 是 3 ： 5 ， 故事书 比 科技 书 多 120 本 ， 两种 书 共 买 了 多少 本 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21063", "content": "钢厂 今年 计划 产 钢 55 万吨 ， 比 去年 增产 25% ， 去 年产 钢 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15969", "content": "政府 关心 农民 就医 ， 在 农村 实行 合作 医疗保险 ． 农村 合作医疗 的 缴费 标准 是 每人 100 元 （ 保 期 从 参保 之日起 一年 ） ． 其中 ， 被 保人 个人 缴纳 (1/5) ， 其余部分 由 政府 财政负担 ． 新 塘村 有 村民 1200 人 ， 问 这 一年 政府 给 新 塘村 负担 多少 医疗保险 金 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "474", "content": "甲地 到 乙地 240 千米 ， 某人 从 甲地 骑 摩托车 去 乙地 ， 1 小时 行 了 60 千米 ， 照 这样 的 速度 ， 他 还要 再行 多少 小时 到达 乙地 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23124", "content": "有 两堆 煤 ， 甲 堆 比 乙 堆 多 28 吨 ． 如果 再 从 乙 堆 中 运 4 吨 到 甲 堆 ， 这时 ， 甲 堆 的 煤 重 是 乙 堆 的 2 倍 ． 甲 堆 原有 煤 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21121", "content": "王 大伯 种 的 龙眼树 有 125 棵 ， 种 的 枇杷树 是 龙眼树 的 9 倍 ． 种 的 枇杷树 比 龙眼树 多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8010", "content": "一 只 梅花鹿 高 1.42 米 ， 一只 长颈鹿 的 高度 比 梅花鹿 的 3.5 倍 还 多 0.8 米 ． 长颈鹿 高 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12601", "content": "10 / [ 9 / 8 / （ 7 / 6 / 5 / 4 ） / 3 / 2 ] = ．", "knowledge": ["/"], "difficulty": 0.7, "length": 17}
-{"question_id": "18329", "content": "一 捆 电线 长 200 米 ， 用 去 了 (1/5) ． 剩下 的 比 用 去 的 多 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14827", "content": "矿泉水 买 5 瓶 送 l 瓶 ． 36 名 同学 每人 要 喝 一瓶 矿泉水 ， 至少 需要 花钱买 多少 瓶 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10751", "content": "一 个 工厂 生产 一种 工艺品 ， 由于 采用 了 新工艺 ， 现在 每 件产品 的 成本 是 40.5 元 ． 比 原来 降低 了 10% ， 比 原来 降低 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11209", "content": "甲 仓 存粮 120 吨 ， 乙 仓 存粮 比 甲 仓 少 (2/3) ， 乙 仓 存粮 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8959", "content": "一 个数 的 80% 是 32 ， 这个 数 的 40% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8963", "content": "王 阿姨 用 电脑 录入 一篇 文章 ， 每分钟 打 58 个 字 ， 12 分钟 能 完成 ， 如果 想 8 分钟 完成 ， 每分钟 应 打 多少 个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14216", "content": "一 根 铁丝 ， 第一次 用 去 全长 的 (2/5) ， 第 二 次 又 用 去 14 米 ， 剩下 的 与 用 去 的 长度 比 是 1 ： 3 ． 这根 铁丝 原来 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19673", "content": "一 本书 共有 72 页 ， 小 红 每天 看 8 页 ， 第 6 天 她 应从 第 多少 页 看 起 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12916", "content": "3 （ 1 ） 班 9 名 同学 植树 ， 如果 每人 植 4 棵 ， 还 剩 3 棵 ， 他们 一共 要 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13170", "content": "3 （ 1 ） 班 48 名 同学 去 植树 ， 每 2 人 一组 ， 一共 分成 了 多少 组 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10327", "content": "在 12 千克 含盐 9% 的 盐水 中 蒸发 水 使 盐水 中 含盐 15% ， 需 蒸发 水 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5386", "content": "4 瓶 饮料 20 元 ， 38 人 每人 一瓶 ， 共 要 付 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20354", "content": "赵 叔叔 开 了 一家 商店 ， 按 营业额 的 5% 缴纳 营业税 ， 某月 赵 叔叔 需 缴纳 税款 约 950 元 ， 赵 叔叔 这 月 的 营业额 约 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3280", "content": "甲 、 乙 两车 同时 从 相距 600 千米 的 a ， b 两地 相对 开出 ， 4 小时 后 ， 两车 共 行驶 了 全程 的 80% ． 已知 甲 、 乙 两车 的 速度 比 是 5 ： 7 ， 甲 车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20187", "content": "王大爷 用 96 元 买 了 3 只 小 猪崽 ． 他 还 想 再 买 6 只 这样 的 小 猪崽 ， 还要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11356", "content": "一 台 水泵 (3/5) 小时 可 抽水 60 吨 ． 照 这样 的 速度 ， 要 抽水 180 吨 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15805", "content": "王奶奶 在 银行存款 20000 元 ， 存 定期 一年 ， 利率 是 2.25% ， 到期 她 可以 获得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9295", "content": "小 丁 要 打 420 个 字 ， 已经 打 好 了 240 个 ， 剩下 的 要 3 分钟 打 完 ， 平均 每分钟 打 几个 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15960", "content": "内 宜 （ 内江 - 宜宾 ） 高速公路 对 某类 车 的 收费 标准 是 0.35 元 / 千米 ， 到 站 后 收取 桥梁 费 8 元 / 车 ． 李 叔叔 一次 开车 在 高速公路 上行 了 288 千米 ， 应 交费 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5387", "content": "一 辆 汽车 从 甲地 开往 乙地 每 小时 行 80 千米 ， 用 了 6 小时 ． 返回 时 只用 了 5 小时 ， 这辆 汽车 返回 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7951", "content": "甲乙 两车 同时 从 两地 相对 开出 ， 甲 车 每 小时 行 32 千米 ， 乙 车 每 小时 行 30 千米 ， 相遇 时 甲 车 比 乙 车 多行 16 千米 ． 求 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21064", "content": "小强 的 妈妈 给 奶奶 汇 了 3000 元 钱 ， 邮局 规定 要 交 1% 的 汇费 ， 则 应 交汇 费 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6020", "content": "四年级 有 学生 147 人 ， 五年级 学生 的 人数 是 四年级 的 (2/3) ， 6 级 学生 的 人数 相当于 五年级 的 (6/7) ． 六年级 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7451", "content": "某人 将 20000 元 存入 银行 ， 存期 3 年 ， 到期 后 共 取出 22136 元 ， 请 算 出 其 存款 利率 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1454", "content": "三年级 同学 大扫除 ， 擦 窗 的 有 48 人 ， 是 拖地 的 人数 的 6 倍 ， 扫地 的 人数 是 拖地 的 人数 的 2 倍 ． 扫地 的 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5050", "content": "17 与 19 的 和 ， 去除 80 与 44 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15106", "content": "水果店 有 苹果 300 千克 ， 梨 的 质量 是 苹果 的 (4/5) ， 梨 的 质量 是 桃子 的 (6/7) ， 桃 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6720", "content": "小 晴 去 新华书店 买 一本 《 趣味 数学 》 ， 原价 15 元 ， 现 打 0.8 出售 ， 小 晴 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7047", "content": "淘气 家 到 笑笑 家 的 路程 是 840 米 ， 两 人 同时 从 家 出发 ， 相向 而 行 ， 淘气 每分钟 走 70 米 ， 笑笑 每分钟 走 50 米 ， 他们 相遇 时 ， 笑笑 走 了 多 远 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1098", "content": "4 （ 1 ） 班 36 名 同学 去 动物园 游玩 ， 中午 时 小巧 和 小 亚 给 大家 买 饮料 ， 由于 买 得 多 ， 阿姨 给予 他们 买 一箱 送 一盒 的 优惠 ， 小巧 和 小 亚 共 付 了 4 箱 的 钱 ， 正好 每人 一盒 ． 那么 每箱 饮料 有 多少 盒 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "999", "content": "59 / 多少 = 8 … 3 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13062", "content": "一 件 衣服 进货价 是 100 元 ， 按 标价 打 0.8 出售 仍 可 获 60 元 的 利润 ， 则 这件 衣服 的 标价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5981", "content": "新庄 苗圃 今年 培育 了 880 棵 松树 苗 ， 比 原 计划 多 培育 10% ． 原 计划 培育 松树 苗 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14494", "content": "甲 、 乙 两袋 大米 的 重量 比 是 4 ： 1 ， 从 甲 袋中 取出 130 千克 大米 放入 乙 袋 ． 这时 两袋 大米 的 重量 比 是 7 ： 5 ． 求 两袋 大米 的 重量 和 = 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14071", "content": "李 大爷 的 养鸡场 ， 养 了 肉鸡 125 只 ， 养 的 蛋鸡 只 数 是 肉鸡 的 3 倍 ， 李 大爷 共 养鸡 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15012", "content": "在 一条 长 80 米 的 小路 一侧 ， 从头到尾 每隔 8 米 栽 一棵树 ， 一共 可以 栽 多少 棵 树 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11977", "content": "生产 一批 零件 ， 甲乙 合 做 需 12 天 完成 ， 甲 单独 做 20 天 可以 完成 ， 若 乙 独 做 需 多少 天 完成 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19853", "content": "为 支援 贫困山区 ， 五年级 捐出 图书 200 本 ， 相当于 六年级 捐出 本 数 的 (4/5) ， 比 六年级 少 捐书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11776", "content": "美术 小组 有 30 人 ， 体育 的 比 美术 的 2 倍 还 多 15 人 ， 体育 小组 有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1132", "content": "4.6 - 1.2 与 1.5 的 积 ， 所得 的 差 除以 3.5 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14831", "content": "演唱会 票价 分别 为 60 元 、 90 元 两种 ， 刘老师 要 各 买 12 张 ， 带 2000 元 钱 还 剩 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7831", "content": "我 今年 8 岁 ， 民警 王 叔叔 今年 44 岁 ， 明年 民警 王 叔叔 的 年龄 是 我 年龄 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8579", "content": "一 条 绳子 长 2 米 ， 剪 去 (2/5) 米 ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7163", "content": "一 批 货物 ， 第一次 运走 40% ， 第 二 次 运走 15 吨 ， 两次 一共 运走 这 批 货物 的 70% ， 这 批 货物 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13069", "content": "妈妈 带 小 明 坐 长途汽车 去 看 奶奶 ， 早上 8 时 出发 ， 中午 12 时 到达 ， 汽车 每 小时 的 速度 是 80 千米 ， 从小 明 家 到 奶奶家 有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13887", "content": "某 一 品牌 电视机 每 台 售价 1500 元 ， 现在 降低 (1/5) 出售 ， 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6032", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 了 全书 的 (1/7) ， 两天 共 看 全书 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "597", "content": "70 + 50 的 和 除以 40 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12615", "content": "口袋 里 有 6 个 红球 和 9 个 黄 球 ， 它们 除 颜色 外 完全相同 ． 现在 从中 摸 出 1 个 球 ， 是 红色 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7840", "content": "一 项 工程 预计 15 人 每天 做 4 小时 ， 18 天 可以 完成 ， 后来 增加 3 人 ， 并且 工作 时间 增加 1 小时 ， 这项 工程 多少 天 完成 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1139", "content": "一 个数 与 (1/7) 的 和 等于 (4/9) 的 45% ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21242", "content": "一 堆 煤 ， 第一天 运走 它 的 (1/7) ， 第 二 天 运走 了 它 的 (4/7) ， 还 剩下 这 堆 煤 的 几分 之 几 没有 运 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14551", "content": "学校食堂 扩建 后 共 占地 420 平方米 ， 增加 的 面积 占 原来 面积 的 40% ， 原来 面积 = 多少 平方米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "221", "content": "商店 有 一种 衣服 ， 原价 每件 40 元 ， 降价 后 每件 只 卖 34 元 ， 便宜 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11521", "content": "一 堆 煤 如果 每天 烧 0.2 吨 ， 36 天 可以 烧 完 ， 实际 每天 烧 0.3 吨 ， 实际 烧 了 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12619", "content": "李 大爷 家 的 麦地 有 (3/2) 公顷 ， 王大爷 家 的 麦地 比 李 大爷 家 的 麦地 大 (1/3) ． 王大爷 家 的 麦地 比 李 大爷 家 的 麦地 大 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4544", "content": "王 丽 在 天平 的 左边 放 一块 蛋糕 ， 右边 放 (1/4) 块 蛋糕 和 90 克 的 砝码 ， 这时 天平 恰好 平衡 ． 一整块 蛋糕 的 重量 = 多少 克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2200", "content": "一 辆 汽车 和 一辆 摩托车 同时 同 地 同一 方向 开出 ， 汽车 每 小时 行 62 千米 ， 摩托车 每 小时 行 45 千米 ， 4 小时 后 ， 两车 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19290", "content": "一 辆 厂 车 每月 用 汽油 4.2 吨 ， 3 辆 这样 的 厂 车 一个 季度 用油 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10916", "content": "淘气 问 笑笑 ： “ 你 今年 几岁 ？ ” 笑笑 回答 回答 说 ： “ 用 我 的 年龄 数 减去 8 ， 乘 7 ， 加上 6 ， 除以 5 ， 正好 等于 4 ， 请 你 算 一 算 ， 我 今年 几岁 ？ ”", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9502", "content": "一 桶 油 连 桶 共 重 60 千克 ， 用 去 油 的 (3/5) 后 ， 连 桶 共 重 30 千克 ． 这 桶 油 净重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17088", "content": "秘书 打印 一份 材料 ， 他 每 小时 打 1600 个 字 ， (5/4) 小时 后 完成 这份 材料 的 (2/3) ， 这份 材料 一共 有 多少 个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6237", "content": "水果店 下午 运 来 水果 45 筐 ， 下午 比 上午 多 运 8 筐 ， 水果店 今天 一共 运 来 多少 筐 水果 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1445", "content": "学校同学 排队 做操 ， 每 列 36 人 ， 要 排 20 列 ． 如果 少 排 2 列 ， 每 列 要 排 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19770", "content": "甲 、 乙 、 丙 3 个 小队 去 农场 采茶 ． 甲队 采 的 是 乙 队 的 (4/5) ， 乙 队 采 的 是 丙 队 的 (5/6) ， 丙 队 采 了 (3/4) 千克 ． 甲队 采 了 多少 千克 茶叶 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17165", "content": "客车 从 甲地 开往 乙地 ， 已 行 (2/5) ， 距 甲地 68 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10300", "content": "在 一个 铁桶 里 装有 一些 水 ， 把 水 加 到 原来 的 3 倍 ， 连 桶 重 9 千克 ； 把 水 加 到 原来 的 8 倍 ， 连 桶 重 19 千克 ． 原来 水 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16528", "content": "食堂 买来 450 千克 大米 ， 买来 的 面粉 比 大米 少 20% ， 买来 面粉 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12764", "content": "有 一桶 油 ， 如果 倒 出 3.2 千克 ， 就 会 剩下 这 桶 油 的 (2/3) ， 这 桶 油 的 质量 = 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11004", "content": "李 叔叔 写 一部 长篇小说 ， 稿费 是 4600 元 ， 按 有关 规定 稿费 超过 800 元 以上 部分 按照 14% 缴纳 个人所得税 ． 李 叔叔 税后 稿费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22020", "content": "一 根 铁丝 长 4.71 米 ， 正好 在 一个 圆筒 上 绕 了 10 圈 ， 这个 圆筒 的 直径 = ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4015", "content": "学校 买来 25 箱 矿泉水 ， 每箱 24 瓶 ， 一共 买 了 多少 瓶 矿泉水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18689", "content": "把 一根 木头 锯 成 两段 要 用 2 分钟 ， 如果 锯 成 8 段 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7002", "content": "一 个 圆柱形 水桶 里 装满 了 水 ， 倒 出 (2/5) 后 ， 还 剩下 24 升 ． 如果 水桶 的 高 是 5 分 米 ， 水桶 的 底 面积 = 多少 平方分米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12067", "content": "水果店 运 来 3750 千克 的 苹果 ， 每 筐 苹果 重 75 千克 ， 卖出 了 45 筐 ， 还 剩 多少 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20326", "content": "小 明 和 姐姐 一道 去 书店 ， 姐姐 买 一本 《 英语 辞典 》 用 去 87 元 ， 小 明 买 一本 科技类 的 书 用 去 24 元 ． 姐姐 付给 收银员 150 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20834", "content": "一 架 直升飞机 每 小时 飞行 400 千米 ， 一列 火车 每 小时 行 80 千米 ． 这 架 直升飞机 每 小时 行 的 千米 数 是 火车 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21293", "content": "如果 小 杰 身高 150 厘米 ， 小 丽 比 小 杰 矮 (1/30) ， 那么 小 丽 身高 为 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15989", "content": "一 枝 钢笔 原价 15 元 ， 降价 10% 以后 ， 又 降价 12% ． 钢笔 现在 售价 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22606", "content": "王 阿姨 给 幼儿园 小班 的 每个 小朋友 买 一辆 玩具 小汽车 ， 如果 买 9 元 钱 一辆 的 需要 72 元 ， 后来 她 买 了 7 元 一辆 的 玩具 小汽车 ， 这样 可 节省下来 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13699", "content": "一 堆 煤 960 吨 ， 第一次 运走 了 总数 的 (1/8) ， 第 二 次 运走 了 总数 的 (3/5) ， 两次 一共 运走 了 多少 吨 煤 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20138", "content": "一 条 裤子 55 元 ， 一件 上衣 的 价钱 是 一条 裤子 的 3 倍 ． 买 这样 一套 衣服 ， 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11482", "content": "王老师 给 品学兼优 的 学生 发 奖品 ． 如果 每人 发 2 本 日记本 ， 则 多出 13 本 日记本 ； 如果 每人 发 3 本 日记本 ， 则 少 5 本 日记本 ． 获奖 的 学生 有 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10014", "content": "甲 、 乙 、 丙 3 个数 的 比 是 3 ： 4 ： 5 ， 他们 的 平均数 是 20 ， 那么 甲 数 比 乙 数 少 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15156", "content": "老王 把 2000 元 钱 存入 银行 ， 定期 3 年 ， 年利率 是 2.98% ， 他 到期 时 从 银行 里 拿到 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19278", "content": "一 只 蜗牛 ， 爬 9 m 高 的 树 ， 白天 上升 lm ， 夜间 下滑 (1/3) m ． 它 从 某日 早晨 开始 向 上爬 ， 多少 天 后 可以 到达 树梢 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6342", "content": "学校 买来 排球 25 个 ， 买来 的 足球 比 排球 多 15 个 ， 两种 球 一共 买来 多少 个 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20918", "content": "一 块 三角形 菜地 3 边 分别 长 24 米 、 17 米 、 16 米 ， 这块 三角形 菜地 的 周长 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14358", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行驶 了 全程 的 (3/7) ， 行驶 了 120 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16687", "content": "一 种 复读机 ， 原价 360 元 ， 商场 打 0.8 销售 ， 打折 后 可以 便宜 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21566", "content": "一 条 道旁 ， 从头到尾 每隔 5 米 种 一棵树 ， 共 种 101 棵 ， 这 条 小道 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4148", "content": "水果店 运 来 香蕉 258 千克 ， 比 运 来 的 苹果 少 62 千克 ， 每箱 苹果 重 20 千克 ， 运 来 苹果 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19934", "content": "一 台 电视机 原来 售价 是 3500 元 ， 现在 比 原来 降低 了 (2/7) ， 降低 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16068", "content": "体育老师 用 460 元 买 了 4 个 篮球 ， 每个 篮球 55 元 ， 剩下 的 钱 正好 能 买 6 个 足球 ， 每个 足球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1994", "content": "一 个 棱 长 4 分 米 的 正方体 水箱 装满水 ， 如果 把 这 箱 水 倒入 另 一个 长 8 分 米 ， 宽 2.5 分 米 的 长方体 水箱 中 ， 水深 = ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3398", "content": "修 一条 长 为 (4/5) 千米 的 道路 ， 3 天 修 了 它 的 (1/4) ． 平均 每天 修 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14556", "content": "甲 、 乙 两辆 汽车 同时 从 相距 225 千米 的 两地 相对 开出 ， 经过 2.5 小时 相遇 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15402", "content": "一 堆 煤 ， 第一次 运走 它 的 (1/3) ， 第 二 次 运走 它 的 (1/4) ， 两次 一共 运走 这 堆 煤 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "16142", "content": "一 根 铁丝 长 120 米 ， 第一次 用 去 (1/4) ， 第 二 次 用 去 (2/5) ， 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11781", "content": "把 一个 长 是 12 厘米 ， 宽 6 厘米 的 长方形 ， 拉 成 一个 高 是 10 厘米 的 平行四边形 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2175", "content": "某 化肥厂 全年 计划 生产 化肥 40 万吨 ， 上半年 生产 了 23 万吨 ， 上半年 完成 了 全年 计划 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6125", "content": "有 一根 长 52 厘米 的 铁丝 ， 恰好 可以 焊接 成 一个 长 6 厘米 ， 宽 4 厘米 ， 高 多少 厘米 的 长方体 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "487", "content": "一 列 火车 3 小时 行 240 千米 ， 照 这样 算 ， 7 小时 行 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4110", "content": "森林 里 ， 动物 们 正在 举行 数字 比赛 ． 羊 老师 出 了 一道 题 ： “ 小 动物 们 站队 ， 小兔 站 中间 ， 它 前边 有 4 只 小 动物 ， 后边 有 5 只 小 动物 ， 一共 有 多少 只 小 动物 ？ ” 小 猴 连忙 举手 说 ： “ 一共 有 9 只 小 动物 ． ” 羊 老师 摆摆头 说 ： “ 错 了 ， 再 想一想 ． ” 小朋友 ， 你 知道 答案 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2982", "content": "工人 叔叔 修 一条 长 4500 米 的 路 ， 已经 修 了 24 天 ， 平均 每天 修 175 米 ， 还 剩下 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20098", "content": "为 庆祝 校庆 ， 6 （ 1 ） 班 要 做 240 面 小旗 ， 已经 做 了 (5/6) ， 还有 多少 面 没 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20079", "content": "我 今年 40 岁 了 ， 女儿 5 岁 时 ， 我 的 年龄 正好 是 她 的 6 倍 ， 你 知道 我 女儿 几岁 了 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1111", "content": "青青草 园 小学 六年级 举行 语文 和 数学 竞赛 ， 参加 数学 竞赛 的 人数 占 全年 级 总 人数 的 80% ， 参加 语文 竞赛 的 占 竞赛 人数 的 60% ， 两 科 都 参加 的 有 30 人 ， 全年 级 共有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7745", "content": "一 筐 苹果 的 (3/5) 是 18 千克 ， 吃 去 这 筐 苹果 的 (1/4) ， 吃 去 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14107", "content": "一 家 宾馆 5 月份 的 营业额 是 12 万元 ， 6 月份 的 营业额 是 13 万 ， 若 按 6% 缴纳 营业税 ， 该 宾馆 两个 月 一共 纳税 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17909", "content": "修 一条 公路 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 全长 的 (1/6) ， 第 3 天 修 了 全长 的 (1/4) ， 还 剩 多少 没有 修 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5366", "content": "李 风 家 今年 养鸡 480 只 ， 养 鹅 的 只 数 是 鸡 的 (2/5) ， 又 是 养鸭 的 (6/7) ， 问 今年 养鸭 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2575", "content": "3 （ 1 ） 班 同学 去 科学 实验室 做 实验 ． 男生 有 26 人 ， 女生 有 22 人 ． 每 4 人 分成 一组 ， 一共 可以 分成 多少 个 小组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10435", "content": "运 一批 货物 ， 第一次 运 了 (1/3) ， 第 二 次 运 了 5 吨 ， 第 3 次 运 了 40% ， 还 剩 7 吨 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6641", "content": "小 芳 今年 15 岁 ， 她 3 年前 的 年龄 与 小 云 2 年 后 的 年龄 相等 ． 小 云 今年 多少岁 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3196", "content": "ab 两地 相距 45 千米 ， 甲乙 两 人 同时 从 a 地 出发 去 b 地 ， 甲 每 小时 走 3 千米 ， 乙 每 小时 走 5 千米 ． 当 乙 到达 b 地 时 ， 甲 离 目的地 还有 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11163", "content": "一 根 电线 长 300 米 ， 用 了 40% 后 ， 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8934", "content": "24 + 91 的 (2/13) ， 所得 的 和 再 除 (19/20) ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19897", "content": "食堂 运 来 大米 7000 千克 ， 比 运 来 面粉 的 2.5 倍 少 500 千克 ， 运 来 面粉 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18894", "content": "妈妈 今年 40 岁 ， 小 红 的 年龄 是 妈妈 的 (3/10) ， 又 正好 是 外婆 的 (1/6) ， 小 红 的 外婆 今年 几岁 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7354", "content": "一 辆 汽车 3 小时 行驶 258 千米 ， 这辆 汽车 的 速度 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22995", "content": "笑笑 借 了 一本 故事书 共 420 页 ， 她 8 天 看 了 56 页 ， 照 这样 的 速度 ， 她 多少 天 可以 看 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3463", "content": "小 芳 站 在 铁路 边 ， 一列 火车 从 她 身边 开 过 用 了 2 分钟 ． 已知 这 列 火车 长 360 米 ， 以 同样 的 速度 通过 一座 大桥 ， 用 了 6 分钟 ， 这 座 大桥 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14337", "content": "某校 少先队员 要 植 一批 树 ， 高年级 植 了 总数 的 (1/2) ， 低年级 植 了 总数 的 (1/3) ． 如果 高年级 比 低年级 多 植 150 棵 ， 那么 这 批 树苗 共有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14744", "content": "一 条 路 已经 修 了 87.5 千米 ， 比 剩下 的 少 21.5 千米 ， 这 条 路 全长 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4776", "content": "一 个 修路 队 3 天 修路 240 米 ， 平均 每天 修路 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1673", "content": "一 个 梯形 的 面积 是 70 cm ^ 2 ， 上 底 是 4 cm ， 下 底 是 6 cm ， 这个 梯形 的 高 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12892", "content": "粮食 店 运进 一批 面粉 和 大米 ， 其中 大米 占 总重量 的 42% ， 大米 比 面粉 少 720 千克 ， 运进 大米 和 面粉 共 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "727", "content": "画圆 时 ， 圆规 两 脚 叉开 的 距离 是 2 cm ， 画 出 的 圆 的 周长 = 多少 cm ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1234", "content": "生产 240 个 零件 ， 师徒 二 人 合 做 6 天 完成 ， 师傅 单独 做 4 天 能 完成 全部 任务 的 (2/5) ， 徒弟 每天 生产 零件 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "805", "content": "小 丽 看 一 本书 ， 第一天 看 了 28 页 ， 第 二 天 看 了 22 页 ， 她 两天 一共 看 了 全书 的 (1/4) ， 这 本书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14203", "content": "现有 浓度 为 20% 的 糖水 350 克 ， 要 把 它 变成 浓度 为 30% 的 糖水 ， 需 加糖 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18561", "content": "水果店 今天 3 种 水果 的 销售 情况 ： 苹果 45% ， 梨 30% ， 橘子 25% ． 已知 销售 梨 和 苹果 共 150 千克 ． 这天 销售 水果 共 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "616", "content": "普通 火车 的 速度 是 85 千米 / 时 ， 高速 火车 的 速度 是 普通 火车 速度 的 3.6 倍 ． 高速 火车 的 速度 = 多少 千米 / 时 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13015", "content": "某 工厂 生产 一批 零件 ， 原 计划 每天 生产 900 个 ， 40 天 完成 ， 实际 每天 生产 1200 个 ． 照 这样 计算 ， 多少 天 能 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9770", "content": "一 群 鸡 中 ， 母鸡 有 12 只 ， 占 总数 的 (2/5) ． 这 群 鸡 一共 有 多少 只 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22132", "content": "学校 这个 星期 前 3 天 节约用水 14.7 吨 ， 后 4 天 平均 每天 节约用水 5.6 吨 ， 这个 星期 平均 每天 节约用水 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7699", "content": "3 个 小朋友 一起 跳远 ， 小强 跳 了 3.06 米 ， 比 小 星 少 跳 0.16 米 ， 小 宇 比 小 星 多 跳 了 0.24 米 ． 小 宇 跳 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "74", "content": "小学 买来 价格 相同 的 排球 和 价格 相同 的 篮球 各 6 个 ， 一 共用 去 510 元 ， 一个 排球 40 元 ， 一个 篮球 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7625", "content": "某 工程队 ， 第一天 修 600 米 ， 第 二 天 修 全长 的 20% ， 第 3 天 修 了 全长 的 25% ， 这时 修 了 的 占 全长 的 75% ， 这 条 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9728", "content": "三年级 的 学生 去 茶园 里 劳动 ． 女生 有 46 人 ， 男生 有 74 人 ． 如果 4 名 学生 分成 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6875", "content": "客车 和 货车 同时 从 甲 、 乙 两地 出发 ， 相向 而 行 ， 10.5 小时 后 相遇 ， 相遇 时 货车 比 客车 多 行驶 60.9 千米 ． 如果 客车 平均 每 小时 行驶 50.2 千米 ， 那么 货车 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2750", "content": "某 厂 原 计划 3 天 生产 690 台 机器 ， 实际 每天 比 原 计划 多 生产 35 台 ， 实际 每天 生产 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22191", "content": "妹妹 今年 10 岁 ， 哥哥 比 她 大 (1/5) ， 哥哥 今年 多少岁 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12885", "content": "小 星 看 一本 故事书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/6) ， 两天 共 看 了 33 页 ． 这 本书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17214", "content": "一 件 上衣 以 240 元 的 标价 卖出 后 ， 刚好 赚 了 20% ． 这件 上衣 的 本钱 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19605", "content": "自行车 超市 37 天 前 共有 927 辆 自行车 ， 卖出 了 435 辆 后 ， 又 从 自行车厂 购买 回 287 辆 ． 这个 自行车 超市 现在 共有 多少 辆 自行车 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2208", "content": "小花 买 了 32 支 铅笔 ， 送给 弟弟 4 支 ， 剩下 的 支数 占 总 支数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19217", "content": "豆浆店 煮 了 44.8 千克 豆浆 ， 分装 在 112 个 杯子 里 ， 平均 每杯 装 了 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13100", "content": "多少 的 (3/4) 等于 80 的 (3/5) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9927", "content": "王 庄 去年 总产值 为 23.5 万元 ， 今年 比 去年 增加 了 20% ， 今年 的 产值 = 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7710", "content": "小 红 读 一本 故事书 ， 她 每天 读 28 页 ， 12 天 大约 读 了 多少 页 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1021", "content": "一 只 装有 水 的 长方体 玻璃杯 ， 底 面积 是 60 平方厘米 ， 水深 8 厘米 ． 现 将 一个 底 面积 是 12 平方厘米 的 圆柱体 铁块 竖 放在 水中 后 ， 仍 有 一部分 铁块 露 在 水面 上 ， 现在 水深 多少 厘米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7347", "content": "水果店 有 苹果 166.5 千克 ， 有 梨 18.5 千克 ， 苹果 的 重量 是 梨 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11798", "content": "小 华 看 一 本书 ， 每天 看 这 本书 的 20% 还 多 40 页 ， 这样 4 天 刚好 看 完 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20995", "content": "甲乙 两 工程队 同时 合 修 一条 隧道 ． 甲队 每天 修 25 米 ， 乙 队 每天 修 32 米 ， 128 天 修 完 ． 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5030", "content": "杭州 至 宁波 铁路 长 168 千米 ， 甲乙 两列 火车 分别 从 两城 同时 相向 而 行 ． 甲 车 每 小时 行 68 千米 ， 乙 车 每 小时 行 72 千米 ， 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13997", "content": "小 军 的 飞机 模型 在 空中 飞行 2 分钟 ， 比 小 峰 的 飞机 模型 的 飞行 时间 长 (1/5) ． 小 峰 的 飞机 模型 在 空中 飞行 了 多长时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4295", "content": "学校 买 9 张 光盘 用 去 180 元 ， 和 买 30 张 软盘 的 价钱 一样 多 ． 一张 软盘 比 一张 光盘 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16820", "content": "某 工程队 修 一条 路 ， 原 计划 每天 修 4.2 千米 ， 15 天 修 完 ． 实际 每天 修 7 千米 ， 实际 多少 天 修 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11474", "content": "重庆 到 贵阳 的 高速公路 全长 380 千米 ． 甲 、 乙 两辆 汽车 同时 从 两地 相向 开出 ， 1.6 小时 后 两车 相遇 ． 已知 甲 车 每 小时 行 116 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9811", "content": "张师傅 计划 3 小时 生产 120 个 零件 ， 实际 每 小时 比 计划 多 做 60 个 ， 实际 每 小时 做 多少 个 零件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "834", "content": "某 养殖场 ， 养鸡 鸭 共 24000 只 ， 鸡 占 总数 的 (5/8) ， 卖出 一部分 鸡 后 ， 鸭 占 总数 的 (3/7) ， 卖出 多少 只 鸡 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4888", "content": "新园 中学 原有 电脑 149 台 ， 今年 新 买 的 比 原有 少 51 台 ． 学校 现在 共有 电脑 多少 台 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4278", "content": "60 千克 比 多少 千克 多 (1/4) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20695", "content": "冬令营 活动 中 学校 包 了 3 辆车 ， 每辆车 乘坐 42 名 学生 ， 到达 目的地 后 每 6 名 学生 分成 一个 活动 小组 ， 问 ， 一共 有 多少 个 活动 小组 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1370", "content": "比 60 米 多 30% = 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22898", "content": "某 超市 运进 320 袋 大米 ， 每 袋 25 千克 ， 卖 了 186 袋 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "309", "content": "某 校服 厂 一套 小学生 夏装 卖 75 元 ， 一套 秋装 卖 95 元 ． 思源 小学 4 （ 1 ） 班 有 48 人 ， 每人 预订 了 一套 夏装 和 一套 秋装 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12952", "content": "把 10 米 长 的 绳子 至少 剪成 多少 段 ， 其中 必 有 一段 的 长度 小于 1 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "460", "content": "数学 兴趣小组 有 30 人 ， 比 英语 兴趣小组 多 (1/5) ， 英语 兴趣小组 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11874", "content": "甲乙 两艘 轮船 分别 从 a 、 b 两 港 同时 出发 相向 而 行 ， 甲 船 每 小时 行驶 18 千米 ， 乙 船 每 小时 行驶 15 千米 ， 经过 6 小时 两 船 在 途中 相遇 ． 两地 间 的 水路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21024", "content": "森林 小学 有 学生 3600 人 ， 五年级 学生 人数 占 全校 总 人数 的 (5/18) ， 五年级 学生 中 女生 占 (4/25) ， 五年级 女生 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12962", "content": "一 个数 的 (1/2) 比 它 的 (3/5) 少 4 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11631", "content": "小 刚 从 家 到 学校 ， 每分钟 走 60 米 ， 16 分钟 可以 到达 ， 放学 回家 时 可用 24 分钟 ， 他 放学 回家 时 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "240", "content": "例 4 ： 甲乙 两 人 分别 从 相距 24 千米 的 两地 同时 向东 而 行 ， 甲 骑 自行车 每 小时 行 13 千米 ， 乙 步行 每 小时 走 5 千米 ． 几小时 后 甲 可以 追 上 乙 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4249", "content": "一 块 地 有 (9/10) 公顷 ， 用 2 台 拖拉机 耕 ， (3/4) 小时 可以 耕 完 ， 平均 每 台 拖拉机 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6315", "content": "有 红 ， 黄 ， 绿 ， 蓝 4 种颜色 的 花 ， 每 2 种颜色 扎成 一束 ， 有 多少 种 不同 的 扎 法 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22029", "content": "东南 摩托车厂 上个月 计划 生产 摩托车 多少 辆 ， 实际 1104 辆 ， 超额完成 了 15% ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7287", "content": "血液 占 一个 人 体重 的 (1/13) ， 小 华 的 体重 是 52 kg ， 他 的 血液 约 有 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2297", "content": "甲 、 乙 两 人 从 相距 1100 米 的 两地 相向 而 行 ， 甲 每分钟 走 65 米 ， 乙 每分钟 走 75 米 ， 甲 出发 4 分钟 后 ， 乙 才 开始 出发 ． 乙 带 了 一只 狗 和 乙 同时 出发 ， 狗 以 每分钟 150 米 的 速度 向 甲 奔 去 ， 遇到 甲 后 立即 回头 向 乙 奔 去 ， 遇到 乙 后 又 回头 向 甲 奔 去 ， 直到 甲 、 乙 两 人 相遇 时 狗 才 停止 ． 这 只 狗 共 奔跑 了 多少 路程 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21761", "content": "小 红 的 衣柜 里 有 3 件 上衣 ， 一条 裙子 和 一条 裤子 ， 配成 一套 衣服 一共 有 多少 种 不同 的 配法 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18031", "content": "一 种 盐水 是 盐 和 水 按 1 ： 9 的 比例 配制 而 成 的 ， 现在 用 180 克 的 水 ， 可以 配制 这种 盐水 多少 克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23046", "content": "6 年 一班 有 男生 25 人 ， 占 全班 人数 的 (5/9) ， 全班 共有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "972", "content": "一 台 电视机 降低 500 元 后 ， 售价 是 1500 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8615", "content": "一 个 木 工厂 要 做 2350 套 家具 ， 已经 做 了 25 天 ， 每天 做 70 套 ， 还 剩 多少 套 没有 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22123", "content": "冷饮店 运 来 30 箱 汽水 ， 运 来 的 桔子水 是 汽水 的 3 倍 ． 汽水 和 桔子水 每箱 都 是 24 瓶 ． 两种 饮料 一共 运 来 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4891", "content": "龙井 小学 6 一班 有 女生 25 人 ， 比 男生 人数 多 (1/4) ， 男生 人数 占 全校学生 人数 的 (2/75) ， 龙井 小学 共有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9422", "content": "希望 小学 三年级 148 人为 灾区 儿童 捐书 ， 如果 每人 捐 5 本 ， 三年级 一共 捐 了 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4117", "content": "拍摄 一套 儿童 写真集 原价 460 元 ， “ 6 • 一 ” 儿童节 期间 ， 0.85 优惠 ， 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10960", "content": "同学 们 排队 做操 ， 每行 站 15 人 ， 可以 站 32 行 ， 如果 每行 多 站 1 人 ， 可以 站 几行 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23041", "content": "某 工厂 食堂 原来 每天 用 煤 (2/5) 吨 ， 改造 锅炉 后 ， 每天 比 原来 节约 (1/6) ， 每天 节约 用 煤 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20520", "content": "一 批 煤 计划 每天 烧 4.8 吨 ， 可以 烧 56 天 ， 如果 每天 用 煤 量减少 0.6 吨 ， 这 批 煤 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7818", "content": "被减数 是 150 ， 减数 与 差 的 比 是 3 ： 2 ， 减数 是 90 ， 差 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2142", "content": "东乡 农场 计划 耕 6420 公顷 地 ． 已经 耕 了 5 天 ， 平均 每天 耕 780 公顷 ． 剩下 的 要 3 天 耕 完 ， 平均 每天 要 耕 多少 公顷 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8448", "content": "一 瓶 可乐 原来 5 元 ， 节日 一律 打 0.8 ， 现 每瓶 售价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23059", "content": "ab 两地 相距 180 千米 ， 甲乙 两车 同时 从 两地 开出 ， 同 向 而 行 ． 甲 车 每 小时 行 105 千米 ， 乙 车 每 小时 行 81 千米 ， 几小时 后 甲 车 能 追 上 乙 车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6819", "content": "78 - 18 的 (5/9) ， 所得 的 差 除以 17 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23042", "content": "某 蔬菜 商店 上午 卖出 蔬菜 128 千克 ， 下午 卖出 215 千克 ， 还 剩 67 千克 ， 这个 商店 原来 有 蔬菜 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17910", "content": "小 明 看 一本 课外读物 ， 看 了 30 页 ， 没 看 的 比 看 了 少 30% ， 还有 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22189", "content": "拖拉机厂 计划 生产 4800 台 拖拉机 ， 实际 比 计划 生产 增产 20% ， 实际 生产 了 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20769", "content": "男生 有 24 人 、 比 女生 多 (1/3) ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6678", "content": "李师傅 加工 一批 零件 ， 每 小时 加工 120 个 ， 8 小时 完成 ． 如果 要 6 小时 加工 完 ， 每 小时 要 加工 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9795", "content": "一 个 比例 的 两个 内 项 分别 是 25 和 1.2 ， 两个 外 项 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2640", "content": "王老师 写 书 所得 稿费 2700 元 ， 按规定 ： 减去 800 元 后 的 部分 按 20% 的 税率 缴纳 个人所得税 ， 王老师 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14215", "content": "李 阿姨 从 邮局 给 家中 汇款 2000 元 ， 汇费 是 汇款 额 的 1% ， 李 阿姨 应付 给 邮局 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12536", "content": "圆柱 的 底面 周长 是 3.14 厘米 ， 高 是 2 厘米 ， 这个 圆柱 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4675", "content": "4 加上 一个 数 的 75% 等于 11.5 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14910", "content": "一 个数 的 (5/6) 是 45 ， 这个 数 的 50% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3624", "content": "王师傅 加工 一批 零件 ， 6 天 完成 了 这 批 零件 的 (2/5) ， 照 这样 计算 ， 剩下 的 还要 做 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13115", "content": "380 + 11 * 20 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18751", "content": "同学 们 做 早操 ， 每行 18 人 ， 正好 可以 站 20 行 ． 如果 每行 排 24 人 ， 可以 站 多少 行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9835", "content": "一 个 最 简分数 分子 缩小 5 倍 ， 分母 扩大 9 倍 后 是 (2/27) ， 原 分数 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7963", "content": "每 100 鸡蛋 含 蛋白质 14.8 克 ， 250 克 鸡蛋 的 蛋白质 含量 = 多少 克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5394", "content": "某校 建 一座 新 教学楼 ， 原 计划 投资 50 万元 ， 实际 比 计划 节约 10% ． 实际 投资 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7741", "content": "李 叔叔 带 900 元 买 化肥 ， 买 了 16 袋 化肥 ， 还 剩 260 元 ， 每 袋 化肥 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9860", "content": "甲地 到 乙地 的 距离 是 2100 米 ， 一辆 自行车 从 甲地 到 乙地 ， 平均 每分钟 行使 95 米 ． 走 了 13 分钟 后 ， 距离 乙地 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6077", "content": "学校 科技 组 有 女生 18 人 ， 男生 人数 比 女生 的 2 倍 少 5 人 ， 学校 科技 组 有 男生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2497", "content": "一 条 公路 ， 工程队 已修 了 (3/8) ， 剩下 50 米 ， 这 条 公路 共有 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18236", "content": "小 明 知道 了 节约用水 的 重要性 后 ， 决定 从 自己 身边 的 小事 做起 ， 于是 ， 他 在 自己 家 马桶 中 放入 了 一个 盛 满 水 的 矿泉水瓶 ． 马桶 的 水箱 容积 是 5 立方分米 ， 现在 用水量 比 原来 节约 了 (1/3) ， 你 知道 小 明 在 在 马桶 里 放入 的 矿泉水瓶 的 体积 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22849", "content": "果园 里 有 梨树 1800 棵 占 果园 总数 的 (3/5) ， 而 桃树 的 棵 数 相当于 果树 总数 的 (5/12) ， 果园 里 有 桃树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "594", "content": "甲 、 乙 两车 先后 从 上海 出发 去 杭州 ， 甲 车 平均 每 小时 行驶 84.5 千米 ， 乙 车 平均 每 小时 行驶 104.5 千米 ， 甲 车 先行 60 千米 后 乙 车 出发 ， 几小时 后 乙 车 追 上 甲 车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16365", "content": "新华书店 运到 一批 图书 ， 第一天 卖出 这 批 图书 的 32% ， 第 二 天 卖出 这 批 图书 的 (9/20) ， 已知 第一天 卖出 640 本 ， 两天 一共 卖出 多少 本 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18662", "content": "体育 室 里 有 足球 50 个 ， 篮球 个数 比 足球 少 8 个 ， 两种 球 共 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5086", "content": "2 只 小猴子 已 摘 了 3 个 香蕉 ． 要 使 每 只 小猴子 分 到 6 个 香蕉 ， 还要 再 摘 多少 个 香蕉 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4969", "content": "一 辆 运送 救灾物资 的 专车 ， 去 时 每 小时 行 65 千米 ， 4 小时 到达 ， 返回 时 ， 5 小时 到达 ， 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7962", "content": "爸爸 今年 37 岁 ， 爸爸 比 爷爷 小 23 岁 ， 今年 爷爷 多 大 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12012", "content": "甲 、 乙 、 丙 3 个 工程队 合 修 一条 21 千米 长 的 公路 ， 甲队 修 了 全长 的 (1/3) ， 乙 队 修 了 全长 的 (3/7) ， 其余 的 由 丙 队 修 完 ． 丙 队 修 了 这 条 公路 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19413", "content": "小 明 从 家 走路 去 超市 ， 每分钟 走 66 米 ， 8 分钟 到达 ． 原 路 返回 时 ， 用 了 6 分钟 ， 返回 时 每分钟 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21631", "content": "一 个数 的 (4/5) 是 80 ， 这个 数 的 75% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7511", "content": "在 一条 长 1200 米 的 马路 两边 每隔 30 米 种 一棵 梧桐树 （ 两端 都 要 种树 ） ， 在 每 相邻 的 2 棵 梧桐树 之间 又 补 栽 1 棵 香 樟树 ． 这 条 马路 两边 一共 栽 了 多少 棵 树 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "893", "content": "8 只 猴子 分 一堆 桃 ， 如果 这 堆 桃子 中 再 加 9 只 ， 那么 每 只 猴 就 能 分 得 7 只 ， 这 堆 桃 原来 有 多少 只 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8134", "content": "一 批 货物 ， 第一次 运走 总数 的 (1/4) ， 第 二 次 运走 总数 的 30% ， 还 剩下 27 吨 ， 这 批 货物 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10743", "content": "少先队员 种树 ， 第一组 13 人 ， 每人 种 2 棵 ； 第 二 组 14 人 ， 共 栽 40 棵 ． 两个 小组 一共 种 多少 棵 树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19269", "content": "一 个 比 的 前项 是 (15/24) ， 比值 是 (5/12) ， 它 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19959", "content": "一 只 轮船 从 上海港 开往 武汉 港 ， 顺流而下 每 小时 行 25 千米 ， 返回 时 逆流而上 用 了 75 小时 ． 已知 这 段 航道 的 水流 是 每 小时 5 千米 ， 求 上海港 与 武汉 港 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14937", "content": "a 、 b 两地 相距 280 千米 ， 甲 车 每 小时 行 36 千米 ， 乙 车 每 小时 行 34 千米 ． 两车 分别 从 a 、 b 两地 同时 出发 ， 相对 开出 ， 相遇 时 甲 车 离 b 地 还有 多 远 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5382", "content": "一 台 电视机 ， 原价 5600 元 ， 商场 搞 促销 ， 0.8 销售 ， 现价 比 原价 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8471", "content": "9 个 小朋友 站 成 一圈 做 游戏 ， 每 两 人 之间 相隔 2 米 ， 你 知道 这 一圈 共 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2138", "content": "小 明 体内 所 含水分 有 32 千克 ， 占 他 的 体重 的 (4/5) ． 小 明 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4614", "content": "某 车间 有 一天 的 出勤率 是 98% ， 有 一 人 病假 ， 这个 车间 共有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15319", "content": "少年宫 美术班 有 124 名 学员 ， 舞蹈班 的 学员 人数 是 美术班 的 2 倍 ， 美术班 和 舞蹈班 一共 有 多少 名 学员 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2771", "content": "用 同样 的 2 台 抽水机 3 小时 可 浇地 1.2 公顷 ， 平均 每 台 每 小时 可 浇地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19960", "content": "修路 工人 3 天 修 完 了 全 工程 的 (1/12) ． 如果 用 同样 的 速度 几天 可 修 完 这 条 路 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14454", "content": "光明 农场 今年 产 柑桔 300 吨 ， 比 去年 增产 (1/5) ， 今年 比 去年 增产 多少 吨 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6857", "content": "看 一集 《 动画 世界 》 ， 片头 和 片尾 用 了 (1/10) 小时 ， 中间 插播 广告 用 (1/8) 小时 ， 已知 每集 一共 播出 时间 为 (3/4) 小时 ， 每集 实际 播出 时间 = 多少 小时 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15580", "content": "一 辆车 从 a 地 行驶 到 b 地 用 了 两天 时间 ， 第一天 行 了 全程 的 (2/5) 多 168 千米 ， 第 二 天 行 的 路 和 第一天 的 路程 比 是 1 ： 4 ， ab 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20146", "content": "亮 亮 买 了 6 个 练习本 ， 燕 燕 买 了 3 个 练习本 ． 每个 练习本 0.5 元 钱 ， 亮 亮 比 燕 燕 多 花 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5908", "content": "甲乙 两车 同时 从 a 、 b 两城 出发 ， 相向 而 行 ， 经过 6 小时 两车 相遇 ， 相遇 后 甲 车 继续 行驶 4 小时 到达 b 城 ， 乙 车 每 小时 行 69 千米 ， ab 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3803", "content": "一 个 工程队 铺设 一条 铁路 ． 计划 15 天 铺 完 ， 每天 铺 1.24 米 ． 已经 铺 了 9.2 天 ， 还 剩 多少 米 没 铺 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21232", "content": "一 列 火车 经过 一个 路标 需要 5 秒钟 ， 通过 300 米 的 山洞 要 20 秒钟 ， 经过 一座 800 米 的 大桥 需要 多少 秒 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13239", "content": "六年级 男生 比 女生 多 (1/4) ， 女生 比 男生 少 12 人 ， 女生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15782", "content": "半径 是 2 厘米 的 圆 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "21637", "content": "一 辆 汽车 行驶 全程 的 (7/9) ， 离 目的地 还有 140 千米 ， 全程 多少 千米 ？ ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19120", "content": "某 商品 打 0.75 后 300 元 出售 ， 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11998", "content": "数 0.63 / 0.7 的 商 加上 2.6 ， 再 乘以 (3/5) ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6182", "content": "好又多 超市 购进 850 箱 饮料 ， 运 了 3 车 ， 还 剩 100 箱 ． 平均 每 车运 饮料 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13791", "content": "新世纪 电影院 原有 座位 24 排 ， 平均 每排 坐 36 人 ； 扩建 后 增加 到 32 排 ， 可比 原来 多 坐 224 人 ． 扩建 后 平均 每排 可以 坐 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13830", "content": "粮店 今天 要 运 49.5 吨 大米 ， 上午 运 了 5 次 ， 每次 运 4.5 吨 ， 下午 还要 运 几次 才能 运 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22230", "content": "一 辆 汽车 从 甲 城 去 乙 城 ， 汽车 的 速度 是 49 千米 / 时 ， 行 了 16 小时 后 离 乙 城 还有 105 千米 ， 甲 城 到 乙 城 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5794", "content": "一 根 钢管 长 18 米 ， 第一次 用 去 (3/4) ， 第 二 次 又 用 去 (1/2) 米 ， 这根 钢管 还 剩 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19951", "content": "小 亮 去 外婆家 2 小时 走 了 8 千米 ， 照 这样 计算 ， 去 外婆家 还要 3 小时 ， 她家 离 外婆家 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2536", "content": "学校 图书馆 的 科普读物 册数 占 图书 总数 的 35% ， 数学 读物 册数 占 图书 总数 的 25% ． 已知 科普读物 和 数学 读物 共 1248 册 ， 学校 图书馆 一共 有 图书 多少 册 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18237", "content": "学校 田径队 有 男 运动员 60 人 ， 比 女 运动员 的 (2/3) 多 6 人 ， 学校 田径队 一共 有 运动员 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17393", "content": "一 个 工厂 计划 生产 570 个 零件 ， 已经 做 了 10 天 ， 平均 每天 生产 21 个 ， 剩下 的 要 在 18 天 完成 ， 平均 每天 要 生产 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "917", "content": "有 一个 长 4 厘米 ， 宽 3 厘米 ， 高 2 厘米 的 长方体 ， 它 的 表面积 = 多少 平方厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "307", "content": "同学 们 练习 跳绳 ， 小 明 跳 了 120 下 ， 小强 跳 的 是 小 明 的 (5/8) ， 小 亮 跳 的 是 小强 的 (2/3) ． 小 亮 跳 了 多少 下 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14321", "content": "某校 三年级 学生 数 如下 ： 甲班 和 乙班 共 83 人 ， 乙班 和 丙 班 共 86 人 ， 丙 班 和 丁 班 共 88 人 ． 甲班 和 丁 班 共 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7943", "content": "小 明 (2/7) 小时 走 了 (12/21) 千米 ， 他 每 小时 走 了 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "932", "content": "6 年 （ 1 ） 班 分 3 个 小组 参加 植树 活动 ， 甲组 植树 60 棵 ， 是 乙组 植树 棵 树 的 (4/5) ， 丙 组 比 乙组 少 植 (2/15) ． 丙 组 植树 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13962", "content": "饲养场 养鸡 450 只 ， 鸡 的 只 数 比 鸭 的 只 数 少 150 只 ． 鸭 的 只 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11753", "content": "比 306 的 5 倍 少 489 的 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8320", "content": "两列 火车 同时 从 甲 、 乙 两城 相对 开出 ， 第一列 每 小时 行 90 千米 ， 是 第 二 列 速度 的 (5/6) ， 这 两列 火车 经过 (8/3) 小时 相遇 ， 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4386", "content": "小 华 一家 上 了 火车 ， 发现 一列 火车 有 12 节 硬座 车 帽 ， 平均 每 节车厢 有 108 个 座位 ； 另外 卧铺 共有 乘客 160 人 ， 这 列 火车 如果 满座 ， 一共 有 多少 名 乘客 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22894", "content": "某 车间 生产 的 产品 的 合格率 是 95% ， 从 这个 车间 取出 320 件产品 ， 这 批 产品 中 不 合格 的 有 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15703", "content": "夏天 空调 促销 ， 一款 空调 原价 8100 元 ， 现在 打 0.8 出售 ． 现在 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12041", "content": "小 明 家 本月 支出 的 电话费 200 元 ， 支出 的 电费 是 电话费 的 (3/5) ， 同时 以 是 煤气费 的 4 倍 ， 小 明 家 本月 支出 的 煤气费 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "687", "content": "一 艘 客轮 从 上海 开往 武汉 ， 12 小时 后 已 行 路程 与 未 行 路程 的 比 是 3 ： 2 ， 照 这样 的 速度 ， 行 完全 程 1100 千米 ， 需要 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9120", "content": "两座 楼 之间 相距 48 米 ， 每隔 6 米 栽 一棵 雪松 ， 两座 楼房 之间 一共 能 栽 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4535", "content": "小马 在 做 一 题 数学题 时 ， 把 第 二 个 加数 135 看成 531 ， 结果 算 出来 的 和 是 716 ， 你 知道 正确 的 结果 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18255", "content": "妈妈 的 体重 60 千克 ， 恰好 是 爸爸 体重 的 (2/3) ， 小 明 体重 是 爸爸 的 (2/9) ， 小 明 的 体重 = 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3566", "content": "一 个 服装店 一天 卖出 80 件 羽绒服 ， 上午 卖出 30 件 ， 每件 羽绒服 110 元 ． 照 这样 计算 ， 下午 比 上午 多 卖 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4209", "content": "星 辉 服装店 以 210 元 的 价格 进 了 20 件 衣服 ， 以 300 元 的 价格 全部 卖出 ， 可 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10424", "content": "一 副 乒乓球拍 26 元 ， 一个 乒乓球 2 元 ． 小 刚 用 50 元 钱 买 一副 乒乓球拍 ， 剩下 的 钱 还 能 买 多少 个 乒乓球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10562", "content": "红红 买 了 一个 闹钟 花 了 11.5 元 ， 买 了 一个 订书 器 花 了 9.85 元 ， 买 闹钟 比 买 订书 器 多 花 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19610", "content": "世界 上 最大 的 鸟 是 鸵鸟 ， 一个 鸵鸟蛋 约 重 1.5 千克 ． 一个 鸡蛋 约 重 0.06 千克 ． 一个 鸵鸟蛋 的 重量 是 一个 鸡蛋 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6264", "content": "小雨 将 20000 人民币 存入 银行 定期 3 年 ， 如果 年利率 是 2.5% ， 国家 新 规定 不用 交纳 利息税 ， 到期 后 ， 她 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12142", "content": "红旗 小学 去年 在校学生 有 640 名 ， 今年 比 去年 增加 了 (1/8) ， 今年 增加 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13254", "content": "一 条 路 ， 已经 修 了 65% ， 还 剩下 多少 没 修 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21605", "content": "叔叔 2008 年 3 月 1 日 把 2000 元 存入 银行 ， 定期 3 年 ， 年利率 为 5.22% ， 到期 时 应交 5% 的 利息 所得税 ， 取款 时 ， 叔叔 一共 可 取回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "19849", "content": "某 工程队 投资 20 万元 完成 了 一项 工程 ， 比 计划 节约 了 (1/5) ， 比 计划 节约 投资 了 多少 万元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20110", "content": "一 种 书包 ， 儿童节 降价出售 ， 每个 售价 28 元 ， 比 原来 的 售价 降低 了 20% ． 这种 书包 原来 每个 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3580", "content": "小 明 刚出生 时 身高 58 厘米 ， 爸爸 身高 174 厘米 ， 爸爸 的 身高 是 小 明 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13417", "content": "一 桶 油 ， 用 去 10 千克 ， 剩下 的 比 用 去 的 少 (4/5) ， 剩下 的 比 用 去 的 少 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15482", "content": "一 根 绳子 的 5 倍 是 45 米 ， 一根 铁丝 是 这根 绳子 的 7 倍 ． 这根 铁丝 长 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12834", "content": "“ 6 一 ” 前夕 ， 大队 部 把 为 幼儿园 做 小 玩具 的 任务 按 5 ： 3 分给 六年级 和 四年级 学生 ． 四年级 实际 做 了 99 件 ， 超过 分配任务 的 10% ， 六年级 原定 任务 = 多少 件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "5095", "content": "一 条 路上 每隔 10 米 有 一根 电线杆 ， 连 两端 一共 有 24 根 ， 这 条 路 有 多少 米 长 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13734", "content": "有 甲 、 乙 两个 仓库 ， 甲 仓库 存 大米 40 吨 ， 如果 从 乙 仓库 中 运出 (1/3) 的 大米 到 甲 仓库 ， 那么 甲 、 乙 两个 仓库 中 大米 一样 多 ． 乙 仓库 有 大米 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15411", "content": "一 副 围棋 42 元 ， 一副 军棋 的 价格 是 围棋 的 (3/14) ， 一副 中国象棋 比 军棋 贵 (8/9) ． 一副 中国象棋 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17697", "content": "操场上 打球 的 同学 比 跑步 的 多 (1/9) ， 跑步 的 比 打球 的 少 10 人 ， 打球 的 同学 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18105", "content": "小强 对 小 丽 说 ： “ 我 比 你 考试 的 分数 的 (9/8) 还 多 5 分 ， 数学 测验 我 考 了 95 分 ” ， 你 知道 小 丽 数学 考 了 多少 分 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7137", "content": "某 手机 超市 门口 放 着 一个 按 20 ： 1 的 比例 制作 的 手机 模型 ， 已知 手机 模型 的 高度 是 180 cm ， 手机 的 实际 高度 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2520", "content": "某种 图书 每套 6 本 ， 售价 72 元 ． 书店 昨天 共 售出 这样 的 图书 18 套 ， 一共 卖 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23050", "content": "由于 日本政府 “ 购买 ” 钓鱼岛 而 引发 中国 民众 自发 的 “ 抵制 日货 ” 行动 ， 导致 日 系 车 销售 “ 遇冷 ” ． 一款 日 系 车 原价 12 万元 ， 现在 降价 (1/6) 出售 ， 这 款 车 现在 的 售价 = 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13119", "content": "若 甲 数 比 乙 数多 0.8 ， 且 甲 数 ： 乙 数 = 7 ： 5 ， 你 能 求 出 甲 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20258", "content": "粮店 运 来 面粉 80 吨 ， 运 来 的 大米 比 面粉 多 65% ， 运 来 的 大米 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11666", "content": "一 列 火车 长 300 米 ． 这 列 火车 通过 一座 大桥 每 分行 900 米 ， 从 车头 开 上 桥 到 车尾 离开 桥 共用 3 分 ． 这 座 大桥 全长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6234", "content": "果园 里 有 荔枝树 150 棵 ， 是 龙眼树 的 (2/3) ， 果园 里 有 多少 棵 龙眼树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7706", "content": "在 一块 长 15 米 、 宽 12 米 的 菜 地上 种 西红柿 ， 平均 每平方米 种 西红柿 9 株 ， 这块 地 共 可以 种 多少 株 西红柿 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4283", "content": "一 辆 汽车 从 甲 城 到 乙 城 ， 已 行 了 全程 的 35% ， 这时 剩下 的 比 已 行 的 还 多 180 千米 ． 甲 城 到 乙 城 的 距离 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8431", "content": "学生 喝 课间 奶 ， 每班 48 袋 ， 发 了 35 个 班 ， 还 剩 172 袋 ， 一共 准备 了 多少 袋 牛奶 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "70", "content": "甲 、 乙 两地 相距 490 千米 ， 货车 从 甲地 开出 ， 速度 是 50 千米 / 时 ， 1 时 后 ， 客车 从 乙地 开出 ， 客车 行驶 4 时 后 与 货车 相遇 ． 客车 每 时 行驶 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1057", "content": "3006 + 300.6 + 30.06 + 3.006 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8612", "content": "36 的 (5/6) 相当于 45 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15174", "content": "一 段 路 已修 了 280 米 ， 占 全长 的 (5/6) ， 全长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4293", "content": "小 丽 有 120 张 邮票 ， 小 芳 的 邮票 是 小 丽 的 (3/5) ， 小强 的 邮票 是 小 芳 的 (2/3) ， 小强 有 多少 张 邮票 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18253", "content": "修路 队 修 一条 水渠 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 全长 的 20% ， 两天 共 修 了 1.35 千米 ， 这 条 水渠 有 多长 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3302", "content": "一 根 绳子 10.4 米 ， 第一次 剪下 0.54 米 ， 第 二 次 剪下 5.2 米 ， 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13909", "content": "一 台 压路机 的 前轮 是 圆柱形 ， 轮 宽 2 米 ， 直径 1 米 ， 如果 每分钟 转 20 周 ， 这 台 压路机 每分钟 可 压 路面 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6468", "content": "在 学校 门口 一条 长 180 米 的 林荫 路 的 一侧 栽 一行 树 ， 起点 和 终点 都 栽 ． 如果 每 两棵树 之间 相隔 3 米 ， 至少 需要 多少 棵 树苗 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12426", "content": "一 个 大 信封 里面 放 着 5 个 中等 的 信封 ， 每个 中等 的 信封 里 又 放 6 个 小 信封 ， 一共 有 多少 个 信封 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16595", "content": "甲 数 是 10.78 ， 乙 数 比 甲 数多 3.88 ， 乙 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10769", "content": "三年级 有 86 个 学生 ， 比 四年级 的 学生 少 37 人 ， 三年级 和 四年级 一共 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14981", "content": "我国 首都北京 到 革命 老区 延安 的 铁路 长 1581 km ， 由 北京 开往 延安 的 列车 平均 每 时 行 108 km ， 已经 行 了 825 km ． 照 这样 的 速度 ， 列车 还要 多少 时间 才能 到达 延安 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14500", "content": "一 种 国产 彩电 现价 为 1440 元 ， 比 原来 减价 10% ， 这种 国产 彩电 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4325", "content": "一 张 cd 碟片 的 周长 是 37.68 厘米 ， 它 的 直径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16354", "content": "一 个 书包 原价 70 元 ， 打 0.6 出售 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13220", "content": "一 本 80 页 的 故事书 ， 第一天 读 了 这 本书 的 (3/5) ， 第 二 天 应从 第 多少 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3707", "content": "两辆 汽车 同时 从 两地 出发 ， 相向 而 行 ， 甲 每 小时 行 65 km ， 比 乙 每 小时 少 行 5 km ， 经过 4.8 h 两车 相遇 ． 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "866", "content": "某市 800 个 外语 教师 懂 英语 或 俄语 ， 其中 懂 英语 的 550 人 ， 既 懂 英语 又 懂 俄语 的 140 人 ， 那么 懂 俄语 的 教师 为 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14989", "content": "用 3 辆 同样 的 卡车 去 运 198 吨 的 苹果 ， 每辆 卡车 每次 运 6 吨 ． 这些 卡车 需要 多少 次 才能 把 苹果 全部 运走 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20573", "content": "一 吨 甘蔗 水 约 可 榨出 186 kg 的 糖 ， 现有 35 吨 甘蔗 水 ， 约 可 榨出 多少 千克 的 糖 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4496", "content": "一 个 教室 的 长 是 8 米 ， 宽 是 6 米 ， 高 是 4 米 ． 要 粉刷 教室 的 天花板 和 4 周 ， 除去 门窗 面积 30 米 ^ 2 ， 要 粉刷 多 大 的 面积 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "18985", "content": "红星 小学 去 郊游 ， 用 8 辆 同样 的 客车 每次 可以 运送 272 名 学生 ， 用 15 辆 这样 的 客车 ， 每次 可以 运送 多少 名 学生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19133", "content": "买 一支 钢笔 要 4.8 元 ， 买 4 支 铅笔 的 钱 是 买 一支 钢笔 的 钱 的 (1/3) ， 买 一支 铅笔 要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22333", "content": "工厂 上半年 生产 电视机 48 万台 ， 下半年 是 上半年 的 (4/5) ， 一年 生产 多少 台 电视机 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "143", "content": "李老师 带 了 2000 元 钱 为 学校 选购 15 台 同样 的 电话机 ， 每 台 128 元 ． 还 剩 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5963", "content": "某校 有 650 个 学生 ， 有 637 人 参观 了 抗日战争纪念馆 ， 参观 抗日战争纪念馆 的 人数 占 全体学生 人数 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13110", "content": "小 明 和 爸爸 一起 去 电脑城 买 电脑 ， 他们 看 上 了 一台 标价 8000 元 的 新款 电脑 ． 小 明 爸爸 对 经理 说 ： “ 打 0.8 行 ？ ” ， 经理 想 了 想 说 ： “ 你 说 的 价格 再 加 5% 吧 ． ” 就 这样 ， 小 明 家 买 的 这 台 新款 电脑 实际 付 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5068", "content": "5 、 六年级 学生 为 希望工程 捐款 ， 分别 占 全校 总 捐款 数 的 (2/7) 和 (1/6) ， 六年级 捐款 427 元 ， 五年级 捐 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19260", "content": "跳水 比赛 中 ， 甲 运动员 前 3 跳 的 成绩 为 ： 76.25 分 、 80.13 分 、 83.45 分 ． 如果 想 超过 乙 运动员 319.13 分 的 总成绩 ， 最后 一 跳 甲 运动员 的 成绩 至少 应 超过 多少 分 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11", "content": "要 修 一段 长 24 千米 的 路 ， 第一天 修 了 4 千米 ， 第 二 天 修 了 余下 的 (3/8) ， 还 剩下 多少 千米 没有 修 完 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22421", "content": "一 根 电线 长 94.2 米 ， 盘成 圈 ， 每圈 直径 0.3 米 ， 这根 电线 可 盘 多少 圈 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3406", "content": "甲乙 两 军舰 同时 从 两个 巷口 相对 开出 ． 甲 军 舰队 每 小时 行 48 千米 ， 乙 军舰 的 速度 是 甲 军舰 的 (5/6) ， 4 小时 两 军舰 相遇 ， 两个 巷口 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20510", "content": "学校 上个月 用水 70 吨 ， 这个 月 节约 (5/14) ， 这个 月 学校 用水 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9221", "content": "一 袋 大米 ， 吃 了 (3/5) ， 剩下 的 占 总数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6557", "content": "一 台 影碟机 降价 15% 后 ， 售价 是 170 元 ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13587", "content": "小 红 去 邮局 ， 买 了 6 套 邮票 ， 每套 12 元 ， 又 买 了 一本 邮 册 ， 每 本 39 元 ． 小 红 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10025", "content": "小 红 乘船 以 6 千米 / 时 的 速度 从 a 到 b ， 然后 ， 又 乘船 以 12 千米 / 时 的 速度 沿 原 路 返回 ， 那么 小 红 在 乘船 往返 的 行程 中 ， 平均 每 小时 行驶 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11579", "content": "一 个 圆柱 的 体积 是 241.2 dm ^ 3 ， 它 的 底 面积 是 12 dm ^ 2 ， 它 的 高 = 多少 分 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14701", "content": "小 红 带 了 一些 钱 和 妈妈 一起 去逛 超市 ， 到 商业 大楼 购物 时 用 了 总 钱 数 的 (2/9) ， 之后 妈妈 又 给 了 小 红 15 元 钱 ， 这时 小 红 身上 的 钱 是 原来 总 钱 数 的 (11/12) ， 小 红 原来 身上 带 了 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12236", "content": "一 辆 卡车 运 化肥 ， 上午 运走 9.5 吨 ， 下午 比 上午 多 运 1.8 吨 ， 全天 共运 了 化肥 多少 吨 ？ （ 5% ）", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9620", "content": "三年级 有 男生 218 人 ， 比 女生 的 2 倍 少 12 人 ． 女生 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "314", "content": "9 个 (1/18) 的 和 乘 (5/6) ， 结果 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10274", "content": "甲 、 乙 两地 相距 480 米 ， 一辆 汽车 从 甲地 开往 乙地 ， 计划 8 小时 到达 ． 因 天气 变化 ， 实际 每 小时 比 计划 少 行 5 千米 ， 实际 多少 小时 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2760", "content": "男工 与 女工 的 比 是 6 ﹕ 5 ， 男工 比 女工 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1072", "content": "街心公园 里 有 各种 树 共 180 棵 ， 其中 槐树 占 (2/9) ． 杨树 棵 数 是 槐树 棵 数 的 (4/5) ． 公园 里 有 杨树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14207", "content": "一 件 上衣 比 一条 裤子 贵 160 元 ， 其中 裤子 的 价格 是 上衣 的 (3/5) ， 一条 裤子 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11489", "content": "(1/3) 与 (3/7) 的 积 ， 除以 (5/14) - (2/7) 的 差 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6616", "content": "小 东家 买 了 一台 冰箱 ， 打 了 0.88 ， 比 原来 便宜 了 240 元 ， 这 台 冰箱 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20152", "content": "一 个 等腰三角 形 一边 长 4 厘米 ， 一边 长 9 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19885", "content": "某 旅游区 有 abcd 4 个 景点 ， 由 a 景点 到 b 景点 的 道路 有 4 条 ， 由 b 景点 到 c 景点 的 道路 有 3 条 ， 由 c 景点 到 d 景点 的 道路 有 5 条 ， 则 由 a 景点 到 b 景点 到 c 景点 再 到 d 景点 的 不同 旅游 线路 有 多少 条 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20482", "content": "一 种 电视机 现在 每 台 售价 720 元 ， 比 原来 降低 (4/19) ， 原来 每 台 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23149", "content": "盒子 里 有 7 个 红球 ， 6 个 白 球 ， 任意 摸 一个 球 ， 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21428", "content": "老师 买 了 96 朵花 ， 每个 花瓶 插 8 朵花 ， 需要 几个 花瓶 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14591", "content": "一 列 汽车 每 小时 行 72 千米 ， 小 芳 骑 自行车 每 小时 行 的 比 汽车 每 小时 行 的 (2/9) 少 4 千米 ． 小 芳 骑 自行车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20239", "content": "王奶奶 家养 了 6 头 大 肥猪 ， 它们 一周 （ 7 天 ） 吃 了 168 千克 食物 ， 平均 每 头 大 肥猪 每天 吃 多少 千克 食物 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9588", "content": "一 个数 比 367 多 233 ， 这个 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13793", "content": "大象 的 体重 是 5.1 吨 ， 是 黄牛 体重 的 15 倍 ． 黄牛 重 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7013", "content": "粮食 仓库 运 来 4.5 吨 大米 ， 运 来 的 面粉 是 大米 的 2 倍 ， 仓库 共运 来 大米 和 面粉 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16131", "content": "一 个 10 米 的 枯井 里 有 一张 蜗牛 ， 它 白天 向 上爬 3 米 ， 夜里 往 下滑 2 米 ， 多少 天 后 蜗牛 爬 出 枯井 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7789", "content": "一 辆 汽车 从 甲地 到 乙地 ， 行 了 总 路程 的 (3/5) 多 60 千米 ， 剩下 的 是 已 行 的 (1/3) ． 甲 、 乙 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21811", "content": "小 红 和 小 薇 投篮 数 之 比 是 3 ： 5 ， 小 薇 比 小 红 多 投 了 6 个 ， 小 红 投 了 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4901", "content": "学校 买来 480 只 气球 布置 教室 ， 每班 分 40 只 ， 可以 分给 多少 个 班 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20789", "content": "一 辆 小汽车 每 小时 行驶 90 千米 ， 比 同 向 行驶 的 一列 火车 的 速度慢 40% ， 请问 这辆 火车 的 速度 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10747", "content": "甲 、 乙 两车 从 a 、 b 两地 同时 出发 ， 相向 而 行 ， 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 60 千米 ， 经过 5 小时 两车 相遇 ， 求 a 、 b 两地 的 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22350", "content": "已知 除数 是 17 ， 商 是 6 ， 余数 是 8 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21081", "content": "小 明 和 小 立 背对背 站立 ， 小 明 向北走 150 米 ， 小 立 向南走 120 米 ， 两 人 相距 多 远 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10166", "content": "一 幢 高 16 层 的 楼房 ， 一楼 的 层高 是 4.5 米 ， 其余 每层 的 层高 都 是 3.2 米 ， 这幢 楼 高 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10846", "content": "小 明 爸爸 买 了 18000 元 的 国家 建设 债券 ， 定期 5 年 ． 如果 年利率 为 3.4% ． 到期 小 明 爸爸 可以 获得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11741", "content": "某 水稻 专业户 去年 种 水稻 亩产量 是 每亩 120 亩 ． 相当 今年 的 (4/5) ， 今年 种 水稻 多少 亩 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1365", "content": "上海市 的 面积 5800 平方千米 ， 比 北京市 小 12000 平方千米 ． 北京市 的 面积 = 多少 平方千米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7397", "content": "王师傅 搬 40 块 玻璃 ， 搬 一块 得 4 元 ， 如果 打碎 一块 没有 搬运费 ， 还要 赔 6 元 ， 最后 王师傅 拿到 了 140 元 ， 问 王师傅 打碎 了 几块 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16134", "content": "把 24 个 苹果 平均 分给 6 个 同学 ， 每个 同学 分 到 多少 个 苹果 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11880", "content": "一 根 长 1884 米 的 铁丝 绕 一个 圆柱形 物体 绕 了 100 圈 ， 求 该 圆柱形 物体 的 直径 长 多少 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5831", "content": "甲 数 是 64 ， 比 乙 数 的 2 倍 还 多 18 ， 求 乙 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3944", "content": "被减数 是 (6/9) ， 减数 是 (2/9) ， 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2986", "content": "一 部 儿童 连续剧 共 336 分钟 ， 分 8 集 播放 ， 平均 每集 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20743", "content": "小 华 从 家 走 到 学校 ， 每分钟 走 60 米 ， 用 了 8 分钟 ． 返回 时 用 了 6 分钟 ， 每分钟 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3190", "content": "从 义乌 到 赤 岸 ， 小 明 跑步 用 了 1.8 小时 ， 巧 丹 跑步 用 了 1.5 小时 ， 小 明 的 速度 比 巧 丹 慢 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20018", "content": "李老师 带 了 850 元 钱 去 文体 商店 买 篮球 ， 买 了 18 个 篮球 ， 找回 40 元 ． 每个 篮球 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8174", "content": "某 工厂 生产 一批 零件 ， 计划 每天 生产 200 件 ， 25 天 可以 完成 任务 ， 实际 每天 超产 25% ， 实际 生产 了 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15280", "content": "两个 小组 装配 收音机 ， 甲组 每天 装配 50 台 ， 第一天 完成 了 总任务 的 10% ， 这时 乙组 才 开始 装配 ， 每天 装配 40 台 ， 完成 这 批 任务 时 ， 甲组 做 了 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1517", "content": "18 个 (1/9) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17738", "content": "一 张 长方形 纸 长 24 cm ， 宽 18 cm ， 把 它 剪 成长 3 cm 、 宽 2 cm 的 小 长方形 ， 一共 能 剪 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4126", "content": "一 件 150 元 衣服 打 0.85 销售 ， 现价 比 原价 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7", "content": "象山 学校 原有 学生 700 人 ， 7 月份 毕业 280 人 ， 9 月份 招 入 新生 350 人 ， 这时 象山 学校 的 学生 比 原来 增加 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1498", "content": "六年级 植树 260 棵 ， 比 原 计划 多 植 了 10 棵 ， 实际 比 原 计划 多 植 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18926", "content": "历史博物馆 成人 票 25 元 ， 学生票 12 元 ． 某 学校 4 位 老师 带领 112 名 学生 参观 历史博物馆 ， 购买 门票 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6406", "content": "比 470 多 320 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12413", "content": "一 袋 面粉 吃掉 40% 后 ， 还 剩下 30 千克 ， 这 袋 面粉 共有 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "266", "content": "13 个 小朋友 在 玩 捉迷藏 的 游戏 ， 已经 捉 到 了 其中 的 3 个人 ， 藏 起来 还 没有 捉 到 的 小朋友 有 多少 个 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3356", "content": "十二 工程局 修 一条 公路 ， 5 个 月 修 了 全长 的 (10/11) ， 平均 每个 月 修 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13785", "content": "221 名 学生 和 5 名 老师 周末 乘 4 辆车 去 郊游 ， 前 3 辆车 每 车 坐 56 人 ， 最后 一辆车 坐 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5512", "content": "同学 们 为 希望工程 捐款 ， 每 400 元 可以 救助 一名 失学 儿童 ， 4 个 班 一共 救助 了 2 名 儿童 ， 平均 每个 班 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17646", "content": "一 项 工程 8 个 工人 做 24 天 完成 了 (2/3) ， 要 在 28 天 内 完成 ， （ 继续 做 下去 ） 需要 增加 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "18983", "content": "城镇 小学 三年级 有 4 个 班 ， 每班 有 8 个 学习 小组 ． 三年级 有 学生 192 人 ， 平均 每个 学习 小组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5584", "content": "小 红 的 体重 是 26 千克 ， 爸爸 的 体重 比 她 的 3 倍 少 4 千克 ． 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13543", "content": "阳光 小学 有 少先队员 967 人 ， 比 全校学生 数 的 (3/15) 少 8 人 ． 这个 学校 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14259", "content": "王 叔叔 用 两条 长度 分别 是 2.83 米 、 1.37 米 的 绳子 接 起来 捆扎 报纸 ． 接口处 共用 去 绳子 0.25 米 ， 接 好 后 的 绳子 有 多长 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7681", "content": "有 25 个 班 参加 表演 ， 每个 班 站 3 列 ， 每 列 16 人 ， 一共 有 多少 人 参加 表演 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "635", "content": "小 明 集 了 一些 邮票 ， 其中 22% 是 中国 邮票 ， 其余 的 是 外国 邮票 ， 外国 邮票 有 78 张 ． 小 明 共 集 了 多少 张 邮票 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19481", "content": "东风 洗染 厂 ， 每天 用水量 比 过去 节约 20% ， 原有 390 吨 水 ， 现在 比 过去 多用 30 天 ， 现在 每天 用水 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21925", "content": "一 根 绳子 的 (6/7) 是 36 米 ， 这根 绳子 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19098", "content": "在 一次 捐款 活动 中 ． 老师 捐 了 360 元 ， 婷婷 捐 了 老师 的 (1/9) ， 婷婷 捐 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12463", "content": "一 列 火车 9 小时 行 720 千米 ， 一架 飞机 3 小时 飞行 2400 千米 ， 飞机 的 速度 是 火车 速度 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6323", "content": "用 同样 的 地砖 铺 地 ， 铺 16 平方米 用 了 128 块砖 ， 如果 再 铺 12 平方米 ， 一共 要 用 砖 多少 块 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8117", "content": "青蛙 从 9 米 的 井底 往 上 跳 ， 每 跳 3 米 要 用 5 分钟 ， 然后 休息 2 分钟 ． 那么 青蛙 从 井底 跳 到 井口 要 用 多少 分钟 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3437", "content": "小 马虎 在 做 一 除法 计算 时 ， 把 除数 70 错 写成 80 ， 算 出 的 商 是 7 ， 这 道 题 的 正确 得数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16680", "content": "小 明 看 120 页 的 书 ， 还 剩下 这 本书 的 (5/8) 没 看 ， 小 明 还 剩 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20574", "content": "学校 栽 了 6 行 杨树 ， 每行 15 棵 ， 栽 的 柳树 比 杨树 多 40 棵 ， 栽 了 多少 棵 柳树 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3376", "content": "图书馆 的 地面 长 25 分 米 ， 宽 12 分 米 ， 若 用 边长 是 2 分 米 的 地砖 铺 图书馆 地面 ， 需要 这样 的 地砖 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5088", "content": "王 强 读 一本 故事书 ， 已经 读 了 80 页 ， 已 读 页数 和 未 读 页数 的 比 是 4 ： 5 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6290", "content": "汽车厂 今年 生产 汽车 2400 台 ， 比 去年 增产 400 台 ， 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22854", "content": "一 本 故事书 ， 看 了 (2/3) ， 没 看 的 是 看 的 页数 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4619", "content": "小 红 昨天 和 今天 共 做 了 16 道 题 ， 昨天 做 了 10 道 ， 小 红 今天 做 了 几道 题 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1215", "content": "一 货车 从 a 镇 运货 到 b 镇 ， 去 的 时候 满载 货物 ， 平均 每 小时 行驶 55 千米 ， 一共 行驶 2.4 小时 ， 返回 时 空车 行驶 了 2 小时 就 到达 a 镇 ， 返回 时 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4109", "content": "电视机 原价 2500 元 ， 现 降价 (1/10) ， 则 现价 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9368", "content": "小强 从 家 到 学校 ， 如果 步行 每分钟 走 80 米 ， 20 分钟 可以 到校 ． 如果 他 骑 自行车 ， 只 需用 8 分钟 就 能 到 学校 ， 他 骑 自行车 每分钟 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "882", "content": "一 辆 汽车 从 9 时 到 12 时 一共 行 315 米 ， 平均 每 小时 行 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8324", "content": "要 把 4500 元 的 奖金 分给 甲 、 乙 两 人 ， 甲 得 的 是 乙 的 80% ． 乙 得 奖金 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "814", "content": "20 张 纸 叠起来 厚 1 毫米 ， 100 张 叠起来 厚 多少 毫米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20344", "content": "计算 ： 2 - (8/9) / (5/4) * (3/16) = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1013", "content": "一 列 火车 长 600 米 ， 以 每分钟 800 米 的 速度 通过 一座 1000 米 的 大桥 ， 需要 多长时间 ？ （ 从 车 头上 桥 到 车尾 离 桥 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10263", "content": "停车场 有 16 辆 货车 ， 轿车 比 货车 的 3 倍 少 5 辆 ， 两种 车 共有 多少 辆 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13798", "content": "王师傅 一 小时 大约 做 28 个 零件 ， 4 小时 大约 能 做 多少 个 零件 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10636", "content": "把 (8/17) 米 平均 分成 4 份 ， 每份 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8778", "content": "修路 队 修 一条 公路 ， 16 天 修 了 24.48 千米 ， 平均 每天 修 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11854", "content": "一 堆 煤 重 (3/4) 吨 ， 用 去 (1/4) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2454", "content": "买 6 个 相同 的 篮球 ， 付出 600 元 ， 找回 54 元 ． 每个 篮球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20092", "content": "服装店 购进 一批 衬衫 ， 其中 女式 衬衫 120 件 ， 男式 衬衫 比 女式 衬衫 的 (2/5) 多 20 件 ． 购进 男式 衬衫 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6898", "content": "甲 数 是 乙 数 的 (3/4) ， 乙 数 是 丙 数 的 (5/8) ， 已知 甲 数 是 60 ， 丙 数 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21831", "content": "一 堆 沙子 的 (1/3) 比 这 堆 沙子 的 (1/2) 少 2 吨 ， 这 堆 沙子 = 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15046", "content": "猜 数 游戏 ： 小 明 对 小兵 说 ： “ 你 先 想 好 一个 数 ， 把 这个 数 减 3 ， 将 差 乘以 2 ， 然后 把 结果 说 出来 ， 我 就 能 猜 出 你 想 的 是 什么 数 ． ” 若 小兵 给出 的 结果 是 106 ， 你 猜 小 明 想 的 数 是 ： 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16400", "content": "甲 城 到 乙 城 ， 6 小时 行 了 全程 的 (1/4) ， 再行 4 小时 ， 一共 行 了 全程 的 几分 之 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7750", "content": "新 时代 小学 组织 三年级 小朋友 去 秋游 ， 共 租 了 4 辆 大客车 ． 每辆 有 50 个 座位 ， 结果 有 13 个 座位 空 着 ． 三年级 共有 多少 名 学生 去 秋游 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9510", "content": "一 个 长方体 的 体积 是 300 ， 横截面 积 是 15 ， 它 的 长 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8403", "content": "小轿车 每 时 能 行 72.8 千米 ， 比 货车 快 20.5 千米 ． 货车 每 时 能 行 多少 千米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11398", "content": "果园 里 有 苹果树 240 行 ， 桃树 155 行 ， 每行 都 是 24 棵 ． 这个 果园 苹果树 比 桃树 多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7344", "content": "一 件 棉袄 现价 120 元 ， 比 原价 降低 了 (1/4) ． 这件 棉袄 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16577", "content": "杨 欢 看 一 本书 ， 第一天 看 了 (3/6) ， 第 二 天 看 了 (2/6) ， 两天 一共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6297", "content": "工程队 修 一条 长 为 84 千米 的 路 ， 原 计划 28 天 完成 ， 实际 21 天 就 完成 了 ， 实际 每天 比 计划 多 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5586", "content": "三年级 4 个 班 的 同学 参加 跳绳 比赛 ， 每班 分 2 组 ， 平均 每组 有 15 人 ． 一共 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "6956", "content": "王 丽 家 在 学校 的 东面 ， 何 川 家 在 学校 的 西面 ． 王 丽 每 分行 70 米 ， 离开 学校 3 分 后 ， 何 川 每 分行 80 米 才 离开 ， 又 经过 12 分 后 两 人 同时 到 家 ． 他们 两家 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "3677", "content": "一 个 正方形 的 边长 是 4 分 米 ， 它 的 周长 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8733", "content": "修建 一条 高速公路 ， 修路 队 第一个 月 修 了 这 条 路 的 (1/5) 多 50 千米 ， 第 二 个 月 修 的 比 全长 的 (1/4) 少 20 千米 ， 结果 还 剩余 300 米 ， 这 条 高速公路 全长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13766", "content": "小 明 有 360 张 邮票 ， 他 每 20 张 放 一组 ， 每 2 组 放在 一个 盒子 里 ， 这样 能 装 几盒 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4707", "content": "水泥厂 有 754 吨 水泥 要 运到 工地 ， 一辆 大 货车 每次 运 8 吨 ， 一辆 小 货车 每次 运 5 吨 ． 两辆 货车 同时 运送 水泥 ， 需要 运 多少 次 才能 把 这 批 水泥 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6988", "content": "学校 买来 一根 17 米 长 的 塑料绳 ， 剪成 10 根 同样 长 的 跳绳 后 还 剩 2 米 ， 每 根 跳绳 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1170", "content": "幸运 号 客轮 从 起始 港口 出发 时 有 游客 305 人 ， 到 中途 一 港口 有 89 人 下船 ， 108 人 上船 ． 此时 客轮 上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12482", "content": "一 种 小家电 ， 打 0.8 后 的 价格 是 160 元 ， 这种 小家电 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16636", "content": "修 一段路 ， 第一天 修 了 全长 的 20% ， 第 二 天 修 了 450 米 ， 还 剩下 全长 的 35% 没有 修 ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16626", "content": "一 台 碾米机 上午 工作 5 小时 ， 下午 工作 4 小时 ， 如果 每 小时 碾米 2.85 吨 ， 这 台 碾米机 一天 共 碾米 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12782", "content": "一 根 铁丝 ， 剪 去 它 的 (5/9) 后 ， 还 剩 8 米 ， 原来 这根 铁丝 长 = 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14801", "content": "1805 年 4 月 2 日 是 丹麦 童话 大师 安徒生 诞辰 ， 其 著作 《 安徒生 童话 》 深受 小朋友 喜爱 ． 小 悦 看 了 144 页 ， 还 剩下 (2/5) 没 看 完 ， 则 这 本书 共有 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2381", "content": "小 丽 (3/8) 时 行 (3/4) km ， (2/5) 时 行 多少 km ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21868", "content": "学校 有 一批 图书 ， 如果 每班 分 45 本 ， 正好 可以 分给 20 个 班 ． 如果 每班 分 得 50 本 ， 可以 分给 几个 班 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9784", "content": "拖拉机 5 台 24 天 耕地 12000 亩 ， 问 18 天 耕 完 54000 亩 ， 需 增加 拖拉机 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7315", "content": "北极熊 是 北极 的 象征 ． 北极熊 也 叫 白熊 ， 是 熊类 中 个体 最大 的 一种 ． 北极熊 身躯 庞大 ， 体长 可 达 2.7 米 以上 ， 行走 时 肩 高 为 1.6 米 ， 最大 的 北极熊 体重 可 达 900 千克 ， 比 棕熊 重 200 千克 ． 奔跑 时 最快 可以 和 骏马 媲美 ． 棕熊 体重 可 达 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8894", "content": "商店 昨天 卖出 某 型号 电视机 18 台 ， 今天 同型号 的 电视机 卖出 23 台 ， 今天 比 昨天 多 收入 9800 元 钱 ， 该 型号 电视机 每 台 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13177", "content": "每 台 电风扇 130 元 ， 学校 买 了 4 台 ， 一共 要 用 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16453", "content": "王 叔叔 带 了 900 元 买 木材 ， 买 了 28 根 木材 ， 剩下 4 元 ． 每 根 木材 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22705", "content": "把 一根 4 米 长 的 铁丝 平均 分成 7 段 ， 每 段长 是 这根 铁丝 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7061", "content": "食用油 的 价格 去年 是 每千克 10.8 元 ， 今年 比 去年 提价 50% ， 今年 食用油 的 价格比 去年 贵 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17123", "content": "小 明 原有 一些 邮票 ， 今年 又 收集 了 28 张 ， 送给 小 飞 19 张 后 ， 还 剩 35 张 ． 小 明 原有 多少 张 邮票 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15647", "content": "一 条 公路 长 81 千米 ， 已经 修 了 46 千米 ． 还 剩下 全长 的 几分 之 几 没 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18921", "content": "图书室 里 科技 书 占 藏书量 的 20% ， 故事书 占 藏书量 的 (1/3) ， 科技 书 比 故事书 少 500 本 ． 图书室 共有 藏书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19077", "content": "一 批 煤 用 去 25% ， 还 剩 48 吨 ， 这 批 煤 共有 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8798", "content": "小 红 8 天 读 一 本书 的 (2/5) ， 剩下 的 准备 6 天 读完 ， 平均 每天 读 这 本书 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5618", "content": "叶 老师 到 书店 买 了 16 本 《 科学家 的 故事 》 ， 每 本 6 元 ， 他 给 售货员 100 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6437", "content": "五年级 有 图书 120 本 ， 正好 是 学校 图书 总数 的 (1/14) ， 学校 有 图书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7970", "content": "同学 们 借 走 了 一些 足球 ， 现在 还 剩下 24 个 ， 正好 是 全部 足球 的 (3/5) ， 一共 有 多少 个 足球 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7168", "content": "一 瓶 洗发水 有 (3/4) 升 ， 3 瓶 洗发水 共有 多少 升 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5871", "content": "已知 相邻 两根 电线杆 之间 的 距离 是 35 米 ， 从小 洪家 到 学校 门口 有 36 根 电线杆 ， 再 往前 595 米 ， 共有 多少 根 电线杆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6457", "content": "一 个 工厂 由于 采用 新工艺 ， 现在 每 件产品 的 成本 是 20.4 元 ， 比 原来 降低 了 15% ． 原来 每 件产品 的 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "603", "content": "120 的 (1/4) 相当于 60 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17644", "content": "商店 零售 娃哈哈 2.5 元 ， 如果 买 一箱 （ 24 瓶 ） 只 需 48 元 ， 妈妈 一次 买 一箱 可以 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12792", "content": "王 丽 做 了 30 朵花 ， 比 李 明 多 做 20% ， 李 明 做 了 多少 朵花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7463", "content": "南山 小学 四年级 共有 4 个 班 ， 每个 班 48 人 ， 平均 每人 为 四川 灾区 捐款 25 元 ， 四年级 学生 一共 捐 了 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19808", "content": "李老师 家 有 4 个 书柜 ， 共有 9 层 ， 每层 都 放 了 25 本书 ， 李老师 家 共有 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1457", "content": "铺路 队 铺 一段 公路 ． 上午 工作 3.5 小时 ， 铺路 164.5 米 ． 每 小时 铺路 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10040", "content": "一 个数 的 60% 是 30 ， 这个 数 的 20% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17522", "content": "长途客车 的 速度 约 是 816 米 / 分 ． 客轮 的 速度 约 是 345 米 / 分 ． 它们 分别 行驶 12 分钟 后 ， 长途客车 比 客轮 多行 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21978", "content": "某村 去年 产粮 48 万千克 ， 比 前年 增加 了 16 万千克 ， 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "282", "content": "我校 将 在 11 月份 召开 运动会 ， 共有 544 名 运动员 ， 体育组 准备 的 号码 布 只 够 (5/8) 的 运动员 使用 ， 至少 还要 定做 多少 张 号码 布 才 够用 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1106", "content": "红星 果园 今年 产 苹果 1200 吨 ， 去 年产 苹果 的 重量 是 今年 的 (5/6) ， 去 年产 苹果 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20932", "content": "战旗 学校 学生 参加 少年宫 活动 ， 参加 美术 小组 有 25 人 ， 比 参加 体育 小组 的 人数 少 (1/6) ， 参加 体育 小组 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2272", "content": "某 船 在 静 水中 的 速度 是 每 小时 13.5 千米 ， 水流 速度 是 每 小时 3.5 千米 ， 逆水 而 行 的 速度 是 每 小时 多少 千米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17194", "content": "建筑工地 运 来 2 吨 黄沙 ， 第一天 用 去 它 的 (2/5) ， 第 二 天 用 去 它 的 (1/4) ， 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6133", "content": "一 个数 除以 9 ， 商 是 23 ， 余数 是 4 ． 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21944", "content": "一 条 铁丝 长 125.6 米 ， 正好 可以 在 一个 圆形 线圈 上 绕 500 周 ， 这个 线圈 的 直径 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3483", "content": "一 桶 油 ， 第一次 用 去 它 的 (1/6) ， 第 二 次 用 去 它 的 (1/4) ． 如果 第 3 次 用 去 3 千克 正好 用 完 ， 那么 第一次 用 去 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7322", "content": "甲 仓库 有 大米 18 吨 ， 乙 仓库 有 大米 13.5 吨 ， 一辆 汽车 一次 最 多 能 运货 4.5 吨 ， 几次 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22343", "content": "火车 2 小时 行驶 204 千米 ， 照 这样 的 速度 ， 广州 到 北京 的 铁路 长 2346 千米 ， 要 行驶 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20604", "content": "20082008 * 2007 - 20072007 * 2008 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8128", "content": "四年级 3 班 分 两个 小组 进行 跳绳 比赛 ， 第一组 18 人 ， 一分钟 共 跳 2152 下 ； 第 二 组 22 人 ， 平均 每人 每分钟 跳 124 下 ， 这个 班 平均 每人 每 分 跳 几下 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17226", "content": "甲乙 二 人 5 小时 共同完成 一批 零件 ， 完成 任务 时 甲 做 了 225 个 ． 已知 乙 的 工效 比 甲 快 (2/9) ． 这 批 零件 一共 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22795", "content": "一 段 路 长 324 米 ， 已经 修 了 240 米 ， 剩下 的 计划 4 小时 修 完 ． 平均 每 小时 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20320", "content": "一 个 正方形 的 广场 ， 边长 50 米 ， 小林 每天 沿 广场 跑 4 周 ， 小林 每天 大约 跑 多少 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18521", "content": "小 明 爱好 书法 ， 他 规定 自己 每周 （ 7 天 ） 平均 每天 写 30 个 大字 ， 这个 星期 他 前 3 天 按时 完成 任务 ， 周 4 因 病 没 写 ， 周 5 周 6 共 写 80 个 大字 ， 周日 他 要 写 多少 个 大字 才 达到 规定 要求 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "280", "content": "张 明 有 48 张 邮票 ， 李 亮 的 邮票 比 张 明 的 (5/6) 多 3 张 ． 李 亮 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11291", "content": "3.45 * 6.8 + 65.5 * 0.68 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18897", "content": "修 一条 路 ， 每天 修 45 米 ， 修 了 4 天 ， 还 剩下 25% 没有 修 ， 这 条 路 共 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3933", "content": "电器 仓库 里 运进 130 台 洗衣机 ， 比 运进 的 空调 少 10 台 ， 运进 的 彩色 电视机 的 数量 是 空调 的 5 倍 多 13 台 ， 运进 的 彩色 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "774", "content": "一 个 圆柱 的 底面 直径 是 2 分 米 ， 侧面 展开 图 是 正方形 ， 这个 圆柱 的 侧 面积 = ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "681", "content": "“ 6 一 ” 儿童节 那天 ， 新华书店 举行 促销 活动 ， 所有 图书 按 原价 的 0.85 出售 ． 小 明 买 了 一套 标价 150 元 的 图书 ， 打折 后 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8264", "content": "有 8 个 〇 ， 拿出 它 的 (1/2) ， = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5581", "content": "王 村 修 一条 长 1200 米 的 水渠 ， 已经 修 了 10 天 ， 还有 480 米 没有 修 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8634", "content": "6 （ 甲 ） 班 有 56 名 学生 ， 男生 29 人 ， 女生 27 人 ， 参加 奥数 小组 有 32 人 ， 参加 科技 小组 有 28 人 ， 两个 小组 都 没有 参加 的 有 20 人 ， 两个 小组 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13710", "content": "徒弟 9 小时 加工 零件 72 个 ， 师傅 平均 每 小时 比 徒弟 多 加工 零件 15 个 ． 师傅 每 小时 加工 多少 个 零件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16948", "content": "体育 李老师 带 1000 元 钱 去 商场 买 篮球 ， 买 了 15 个 ， 还 剩 40 元 钱 ， 每个 篮球 的 价钱 = ？ ", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12759", "content": "老师 买 了 48 个 日记本 ， 买 的 日记本 比 数学 本 少 (1/7) ， 老师 买 了 多少 个 数学 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15282", "content": "把 一根 长 4.2 米 的 绳子 截 成 两段 ， 其中 一段 与 另 一段 之 比 是 5 ： 2 ， 应 在 多少 米处 截断 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19231", "content": "186 - 98 的 差 ， 再 乘 47 + 25 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16682", "content": "欣欣 电脑城 新 进 240 台 电脑 ， 前 3 天 卖出 30% ， 照 这样 计算 ， 还 需要 几天 才能 卖完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6203", "content": "小 明 去 书店 ， 买 了 一本 字典 用 13.2 元 ， 还 买 了 一本 少年 百科全书 ， 少年 百科全书 比 字典 贵 9.27 元 ， 小 明 买 书 共 花 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21844", "content": "一 根 铁丝 围成 了 一个 边长 4 厘米 的 正方形 ， 这根 铁丝 长 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1069", "content": "某班 统计 数学 成绩 ， 得 平均 分为 87.13 ， 经 复查 ， 发现 将 吴江 的 98 分 误 作 89 分 ， 再 计算 ， 平均 分为 87.31 求 这个 班 有 学生 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12262", "content": "学校 要 挖 一个 长方形 状 沙坑 ， 长 5 米 ， 宽 3 米 ， 深 0.6 米 ， 需要 多少 立方米 的 黄沙 才能 填满 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14123", "content": "王 玲 今年 身高 165 厘米 ， 比 去年 长 高 5 厘米 ， 今年 比 去年 长 高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7304", "content": "一 辆 客车 从 甲地 开往 乙地 ， 第一天 行 了 全程 的 (1/5) ， 第 二 天 行 了 450 千米 ， 这时 已 行 的 路程 与 剩下 的 路程 的 比 是 3 ： 7 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1255", "content": "一 个 工厂 现在 每 件产品 的 成本 是 340 元 ， 比 原来 降低 了 15% ， 原来 每件 成本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3441", "content": "学校 买来 54 本 新书 ， 其中 科技 书 占 (1/6) ， 文艺 书 占 (1/3) ， 文艺 书 比 科技 书 多 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20205", "content": "把 4 根 铁条 焊接 成 一根 直 条 ， 用 去 6 分钟 ， 照 这样 计算 ， 如果 把 8 根 这样 的 铁条 焊接 成 一根 直 条 ， 一共 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8475", "content": "甲 、 乙 两地 相距 560 千米 ， 一列 客车 和 一列 货车 同时 从 甲 、 乙 两地 相对 开出 ， 经过 3.5 小时 两车 相遇 ， 客车 每 小时 行 90 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4005", "content": "46 / 580 - 74 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20402", "content": "实验 小学 有 1800 名 学生 ， 5 （ 2 ） 班 的 学生 人数 占 全校 总 人数 的 (1/36) ， 占 六年级 人数 的 (1/6) ． 实验 小学 六年级 有 多少 名 学生 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11010", "content": "服装店 有 一批 衣服 ， 第一天 卖出 30% 后 ， 又 运 来 120 件 ， 这时 店里 的 服装 正好 比 原来 少 6% ， 店里 原来 有 服装 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5768", "content": "菜园 里 收 了 3 筐 白菜 ， 每 筐 重 210 千克 ， 共 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15340", "content": "压路机 的 滚筒 是 一个 圆柱体 ， 直径 是 1.5 米 ， 宽 是 2 米 ． 现在 向前 滚动 40 周 ， 求 压出 路面 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "15900", "content": "光明 小学 购买 一批 校服 ， 每件 上衣 48 元 ， 裤子 26 元 ． 四年级 共有 210 名 学生 ， 每人 买 一套 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14645", "content": "操场上 有 108 名 同学 在 锻炼身体 ， 其中 女生 占 (2/9) ， 后来 又 来 了 几名 女生 ， 使 女生 人数 和 男生 人数 的 比 是 3 ： 7 ， 后来 来 了 几名 女生 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8583", "content": "2 吨 的 25% 与 多少 吨 的 (5/7) 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18592", "content": "每 一箱 梨 的 重量 为 18 千克 ， 一辆 卡车 每次 最 多 运送 360 箱 梨 ． 这辆 卡车 运送 8 次 ， 最 多 可以 运送 多少 千克 梨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20085", "content": "图书室 买 回 一批 图书 ， 每个 书架 可 放 150 本书 ， 放 了 11 个 书架 ， 还有 630 本 没 放进去 ， 学校 一共 买 回 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6541", "content": "甲乙 两个 港口 相距 180 千米 ， 一艘 客船 从 甲 港 出发 向 乙 港 驶去 ， 每 小时 行 20 千米 ， 2 小时 后 一艘 货船 从 乙 港 出发 ， 以 每 小时 15 千米 的 速度 向 甲 港 驶去 ， 货船 行驶 几小时 后 在 途中 与 客船 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21958", "content": "红 黑 球 共 40 个 ， 其中 红球 占 62.5% ， 红球 比 黑 球 多 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12999", "content": "修路 队 修 一条 公路 ， 第一天 修 了 13.4 千米 ， 比 第 二 天 多 休 了 0.6 千米 ， 两天 共 修 了 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12146", "content": "学校 图书室 有 故事书 和 科技 书 共 620 本 ， 故事书 的 本 数 是 科技 书 的 3 倍 ． 故事书 有 多少 本 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21860", "content": "一 本书 140 页 ， 小 明 已经 看 了 20 页 ， 剩下 的 他 想 在 3 天 内 看 完 ， 平均 要 看 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11201", "content": "一 个 打字员 5 分钟 打 了 560 个 字 ， 照 这样 计算 ， 他 再 工作 18 分钟 ， 就 能 把 一份 稿件 打 完 ， 这份 稿件 一共 有 多少 个 字 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15122", "content": "一 支 圆珠笔 比 一本 练习本 贵 8 元 ， 已知 练习本 的 单价 是 圆珠笔 单价 的 (1/5) ． 一本 练习本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5012", "content": "一 辆 汽车 的 速度 是 60 千米 / 时 ， 从 甲地 到 乙地 行 了 15 时 ． 如果 返回 时 每 时 行 90 千米 ， 这辆 汽车 返回 的 时间 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3660", "content": "小 明 星期 6 去 外婆家 玩 ， 他 骑 的 自行车 轮子 的 直径 是 0.6 米 ， 快 到 外婆家 时 要 通过 一座 长 1884 米 的 桥 ， 过 这 座 桥 自行车 的 轮子 要 转 多少 圈 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13044", "content": "小 明 家 有 白兔 48 只 ， 黑 兔 比 白兔 多 24 只 ， 把 黑 兔 平均 装 在 8 个 笼子 里 ， 每个 笼子 里 装 几只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16463", "content": "学校 买来 排球 22 只 ， 比 买来 的 篮球 的 只 数 的 2 倍 少 6 只 ， 学校 买来 篮球 和 排球 共 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14882", "content": "(6/5) + 14 / (7/2) 的 商 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22685", "content": "有 红 金鱼 38 条 ， 花 金鱼 的 条数 是 红 金鱼 的 3 倍 ， 花 金鱼 比 红 金鱼 多 多少 条 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1005", "content": "水果店 运 来 15 筐 桔子 和 12 筐 苹果 ， 一共 重 600 千克 ． 每 筐 桔子 重 20 千克 ， 每 筐 苹果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11846", "content": "儿童 剧场 楼下 有 308 个 座位 ， 楼上 有 9 排 ， 每排 有 32 个 座位 ， 儿童 剧场 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13088", "content": "3 名 工人 5 小时 加工 零件 90 件 ， 要 在 10 小时 完成 540 个 零件 的 加工 ， 需要 工人 多少 人 ？", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2589", "content": "一 根 木棒 截下 (1/3) 正好 是 3 米 ， 这根 木棒 原来 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21894", "content": "人体 中 的 血液 约 占 体重 的 (1/13) ， 血液 里 的 (2/3) 是 水 ． 小 华 的 体重 是 39 千克 ． 他 的 血液 里 大约 含水 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19649", "content": "540 与 120 的 和 ， 除以 74 与 30 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23152", "content": "平行四边形 的 底 是 (4/5) 米 ， 是 高 的 (2/3) ， 高 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4389", "content": "某 数 的 5 倍 + 6 ， 再 除以 7 ， 结果 是 8 ， 求 某 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12083", "content": "一 个 密封 的 长方体 玻璃缸 ， 长 50 厘米 、 宽 30 厘米 、 高 20 厘米 ， 水深 10 厘米 ， 如果 把 玻璃缸 向 右 竖立 后 ， 这 是 水深 多少 厘米 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "33", "content": "甲 、 乙 两车 同时 从 a 、 b 两城 出发 ， 相向 而 行 ． 经过 一段时间 后 ， 甲 车行 了 全程 的 (2/3) ， 乙 车行 了 全程 的 45% ， 这时 两车 相距 35 千米 ． a 、 b 两城 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12833", "content": "一 套 课桌椅 的 价格 是 48 元 ， 其中 椅子 的 价格 是 课桌 的 (5/7) ． 椅子 的 价格 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10700", "content": "5 六年级 同学 去 植树 ， 五年级 去 了 47 人 ， 六年级 去 的 人数 比 五年级 的 3 倍 还 多 12 人 ， 问 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5835", "content": "徒弟 每 小时 加工 86 个 零件 ， 比 师傅 少 24 个 ， 师傅 6 小时 可 加工 零件 多少 个 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10179", "content": "一 盒 钢笔 的 (3/5) 正好 是 15 枝 ， 这 盒 钢笔 共有 多少 枝 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18010", "content": "一 个数 的 3.4 倍 是 68 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21935", "content": "小 明 买 了 4 枝 钢笔 ， 付给 营业员 30 元 ， 找回 1.2 元 ， 平均 每枝 钢笔 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20096", "content": "商 和 除数 都 是 1.2 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11920", "content": "小强 每天 早上 跑步 21 分钟 ， 速度 是 138 米 / 分 ， 小强 每天 早上 大约 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22663", "content": "当 含盐 为 30% 的 60 克 盐水 蒸发 为 含盐 40% 的 盐水 时 ， 盐水 重量 = 多少 克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4246", "content": "王 大伯 种 5 棵 苹果树 共 收 苹果 280 千克 ， 每 7 千克 装 一筐 ， 需要 多少 个 筐 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "29", "content": "小 明 把 1800 元 存入 银行 ， 定期 整存整取 3 年 ． 如果 按 年利率 3.33% 计算 ， 到期 后 小 明 可 得 利息 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8521", "content": "除数 是 6 ， 商 是 75 ， 余数 是 5 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22653", "content": "在 一段 长 650 米 的 马路上 铺设 路灯 ， 每隔 50 米 铺设 一盏 ， 一共 需要 多少 盏 路灯 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8032", "content": "某 商品 按 每个 7 元 的 价格 卖出 6 个 的 利润 ， 与 按 每个 8 元 的 价格 卖出 4 个 的 利润 一样 多 ． 这种 商品 的 进货价 是 每个 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17328", "content": "84 千克 黄豆 可 榨 12 千克 油 ， 照 这样 计算 ， 如果 要 榨 120 千克 油 需要 黄豆 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18068", "content": "运输 公司 运 一批 树 ， 第一次 运 了 (1/7) ， 第 二 次 运 了 (1/5) ， 还 剩 230 棵 没有 运 ， 这 批 树苗 一共 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16178", "content": "甲乙 两车 分别 从 a 、 b 两地 同时 相向 而 行 ， 甲 车 每 小时 行 40 千米 ， 乙 车行 完全 程 要 6 小时 ， 相遇 时 乙 车行 了 全程 的 (7/12) ， 这时 甲 车行 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7637", "content": "一 块 铁片 ， 第一次 用 去 (9/10) 米 做 材料 ， 第 二 次 用 去 余下 的 (3/5) 做 小门 ， 两次 共用 去 6 米 ． 这块 铁片 原来 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2377", "content": "工程队 第一天 修路 158 米 ， 第 二 天 修 的 长度 是 第一天 的 2 倍 多 21 米 ， 这个 工程队 两天 一共 修路 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4487", "content": "720 连续 减去 多少 个 90 的 差 正好 等于零 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8864", "content": "丰收 粮仓 优惠 销售 某种 优质 大米 ， 每千克 的 价格 是 5.68 元 ， 妈妈 买 了 20 千克 ， 付给 售货员 120 元 ， 还 剩下 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16452", "content": "一 辆 汽车 每 小时 行驶 45 千米 ， 这辆 汽车 (4/5) 小时 行驶 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1268", "content": "粮油 批发市场 共有 520 吨 大米 ， 第一周 批发 走 总数 的 40% ， 第 二 周 批发 走 总数 的 (1/4) ． 还 剩 多少 吨 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17967", "content": "小 明 买 了 4 支 圆珠笔 用 了 6 元 ． 小 刚 想 买 12 支 同样 的 圆珠笔 ， 需要 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6162", "content": "一 辆 汽车 以 每 小时 45 千米 的 速度 从 甲 城 开往 乙 城 ， 3 小时 行 了 全程 的 (5/9) ． 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12107", "content": "多少 人 比 80 人 少 (1/8) ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1501", "content": "李 大伯 家 去年 收 小麦 1050 千克 ， 是 收 玉米 的 1.5 倍 ， 他家 去年 这 两种 粮食 共 收 了 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6869", "content": "60 个 25 相加 的 和 除以 15 的 20 倍 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8325", "content": "一 列 客车 从 北京 开往 上海 ， 每 小时 行 90 千米 ， 同时 有 一列 火车 从 上海 开往 北京 ， 每 小时 行 80 千米 ， 经过 8 小时 两车 还 相距 100 千米 ． 北京 到 上海 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3930", "content": "和 盛 超市 上午 收 货款 1.78 万元 ， 下午 比 上午 多 收 0.536 万元 ． 和 盛 超市 全天 共 收 货款 多少 万元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1269", "content": "404 / 2 的 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10360", "content": "胜利 小学 为 山区 同学 捐书 ， 四年级 捐 240 本 ， 五年级 捐 的 是 四年级 的 2 倍 ， 六年级 比 五年级 多 捐 130 本 ， 六年级 捐 了 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22353", "content": "甲 数 是 137 ， 乙 数 是 甲 数 的 5 倍 ， 甲乙 两 数 相差 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1195", "content": "一 件 衣服 进货价 80 元 ， 按 标价 打 0.6 出售 仍 获 52 元 利润 ， 则 这件 衣服 标价 为 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16066", "content": "水果店 运 来 苹果 ， 葡萄 各 20 箱 ． 苹果 每箱 25 千克 ， 葡萄 每箱 15 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9344", "content": "学校 进行 广播操 比赛 ， 有 25 个 班 参加 ， 每个 班 排成 4 组 ， 每组 有 12 人 ， 一共 有 多少 名 学生 参加 广播操 比赛 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11816", "content": "一 张 桌子 的 价钱 是 120 元 ， 是 一把 椅子 的 3 倍 ， 一把 椅子 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17372", "content": "红星 服装厂 6 月份 计划 加工 服装 32000 套 ， 结果 上 半月 完成 计划 的 (3/5) ， 下半月 完成 计划 的 (5/8) ， 这个 月 比 原 计划 多 加工 服装 多少 套 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10686", "content": "一 辆 汽车 从 甲地 到 乙地 ， 5 小时 行 了 360 千米 ． 照 这样 计算 ， 再行 3 小时 就 能 到达 乙地 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13929", "content": "某 公司 投资 建设项目 ， 实际 投资 600 万元 ， 比 计划 节省 (1/6) ． 计划 投资 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2500", "content": "一 个数 除以 7 ， 商 是 3 ， 余数 是 1 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4705", "content": "一 个 玩具厂 生产 一种 玩具 ， 上个月 生产 800 件 ， 这个 月 比 上个月 少 生产 (3/16) ， 这个 月 生产 玩具 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12765", "content": "一 个 田径队 有 男生 20 人 ， 女生 15 人 ， 女生 人数 是 男生 人数 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3303", "content": "某 学校 里 三年级 有 325 个 男生 ， 比 女生 少 29 人 ， 三年级 一共 有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "329", "content": "一 份 稿件 共 3000 字 ， 小 明 录入 了 这份 稿件 的 (5/6) ， 小 明 录入 了 多少 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1164", "content": "一 条 小路 全长 900 米 ， 要 在 路 的 一旁 植树 ， 从头到尾 共 植树 61 棵 ， 每 两棵树 之间 相距 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4072", "content": "在 一座 桥 上 ， 两侧 各 有 20 块 广告牌 ， 每块 长 3 米 ， 宽 2 米 ． 两块 广告牌 之间 相距 5 米 ， 靠近 桥 两端 的 广告牌 距离 桥 端 是 50 米 ， 求 这 座 桥 长 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "22201", "content": "一 种 铁矿石 的 含铁 率 是 30% ， 炼铁 (3/8) 吨 需 这种 铁矿石 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16235", "content": "有 一块 长方形 木料 ， 长 10 分 米 ， 宽 6 分 米 ， 把 它 锯 成 一个 最大 的 正方形 后 ， 剩下 的 木料 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4661", "content": "一 个 比 的 前项 是 (2/3) ， 比值 是 0.6 ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18597", "content": "欣欣 农场 养 了 125 只 鸡 ， 养鸭 的 只 数 是 鸡 的 7 倍 ． 欣欣 农场 一共 养鸡 、 鸭 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4702", "content": "小强 比 小 斌 多 12 张 彩色 画片 ， 这个 数目 正好 相当于 小 斌 画片 张 数 的 (3/10) ， 小强 有 多少 张 彩色 画片 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12731", "content": "周末 ， 小洋 一家 5 人 去 登山 ， 带 了 2 个 旅行包 ， 5 个 轮流 背 ， 走 了 15 千米 ， 则 平均 每人 背包 走 了 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "188", "content": "一 人 有 米 ， 过 关税 时 第一次 收取 (1/3) ， 第 二 次 收取 剩下 的 (1/5) ， 第 3 次 收取 剩下 的 (1/7) ， 还 剩 5 斗 米 ， 问 原有 几斗 米 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1274", "content": "张师傅 计划 30 天 加工 1500 个 零件 ， 实际 提前 了 5 天 ， 实际 每天 加工 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8807", "content": "学校 六年级 有 195 人 参加 了 “ 百 题 无差错 ” 竞赛 ， 全 对 人数 占 (2/5) ， 而 全 对 人数 中 的 (7/13) 是 女生 ， 全 对 的 女生 人数 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13259", "content": "月 利 收集 20 张 邮票 ， 燕 超 收集 的 邮票 是 月 利 的 3 倍 ． 桂 香 比 燕 超 少 收集 15 张 ． 桂 香 收集 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22559", "content": "蜡笔画 有 80 幅 ， 蜡笔画 比 水彩画 多 60% ， 水彩画 有 多少 幅 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7164", "content": "一 个数 是 36 的 25 倍 ， 这个 数 平均 分成 9 份 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12724", "content": "新民 小学 的 学生 比 河 屯 小学 的 学生 多 (3/5) ， 河 屯 小学 的 学生 比 新民 小学 的 学生 少 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20156", "content": "杨 叔叔 的 商店 有 8 箱 冰棍 ， 每箱 30 根 ． 4 天 全部 卖完 ， 杨 叔叔 平均 每天 卖 多少 根 冰棍 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12864", "content": "一 桶 油 两天 卖完 ． 第一天 卖 了 36% ， 第 二 天 卖 了 32 千克 ． 这 桶 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9430", "content": "6 （ 1 ） 班 男生 占 全班 总 人数 的 (3/5) ， 求 女生 占 男生 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21712", "content": "光明 小学 购买 教学设备 ， 原 计划 投资 80 万元 ， 实际 比 原 计划 超出 4 万元 ， 超出 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22166", "content": "服装厂 要 生产 475 套 服装 ． 前 5 天 共 生产 了 95 套 ， 照 这样 计算 ， 完成 这 批 任务 共 需 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15010", "content": "一 堆 沙 400 吨 ， 第一天 运走 (5/8) ， 第 二 天 运走 100 吨 ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7373", "content": "某 方便面 的 广告语 这样 说 ： “ 增量 25% ， 加 量 不 加价 ． ” 一袋 方便面 原来 的 重量 是 100 克 ， 你 知道 现在 增量 后 有 多少 重 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "386", "content": "给 小 冬 做一套 衣服 ， 上衣 用布 2.4 米 ， 裤子 用布 是 上衣 的 (5/6) ， 做一套 这样 的 衣服 共 用布 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7100", "content": "小花 做 了 38 朵花 ， 比 小 红 少 做 17 朵 ． 两个 人 一共 做 了 多少 朵 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21342", "content": "一 种 大豆 每千克 含油 (4/25) 千克 ， 100 千克 大豆 含油 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7329", "content": "花猫 的 只 数 比 白猫 多 20 只 ， 正好 比 白猫 多 10% ， 花猫 有 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4658", "content": "一 台 计算器 195 元 ， 一台 电脑 的 价钱 比 计算器 的 价格 30 倍 少 150 元 ． 一台 电脑 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21417", "content": "20 个 同学 排成 一队 做操 ， 每 两 人 之间 相距 1.8 米 ， 这 支 队伍 从前 到 后 一共 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "992", "content": "校办 厂 生产 塑料盒 ， 已经 完成 原 计划 的 85% ， 如果 再生产 3000 个 ， 就 超过 计划 15% ， 原 计划 生产 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18194", "content": "操场上 跑步 的 有 135 人 ， 比 做操 的 多 37 人 ， 操场上 跑步 的 和 做操 的 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1772", "content": "某 学校 参加 元旦 联欢 活动 的 少先队员 中 ， 女队员 占 全体 少先队员 的 (4/7) ， 男队员 比 女队员 的 (2/3) 多 40 人 ， 问 男队员 有 多少 人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "633", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相对 开出 ， 甲 车 比 乙 车 每 小时 多行 28 千米 ， 经过 6 小时 相遇 ， 相遇 后 两车 继续前进 ， 又 经过 3 小时 ， 甲 车 到达 b 地 ， 这时 乙 车 距 a 地 还有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11103", "content": "一 堆 水泥 (3/5) 吨 ， 运走 (2/3) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5987", "content": "一 个数 除以 8 ， 商 是 65 ， 余数 是 6 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15422", "content": "手工 小组 的 同学 用 15 平方分米 大 的 彩纸 叠 千纸鹤 ， 每个 千纸鹤 用 去 彩纸 (3/5) 平方分米 ． 将 这些 千纸鹤 的 (13/25) 送给 幼儿园 的 小朋友 ， 送给 幼儿园 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "956", "content": "停车场 上 ， 车牌号 是 单数 的 有 46 辆 ， 车牌号 是 双数 的 车 比 单 号 的 车 的 3 倍 多 15 辆 ， 车牌号 是 双数 的 车 有 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22151", "content": "(3/8) 吨 煤 用 去 (1/4) 后 = 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16784", "content": "一 个 月饼 ， 小 红 吃 (5/12) ， 妈妈 吃 了 (1/12) ， 还 剩下   ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8013", "content": "电视机厂 原 计划 20 天 生产 一批 电视机 ， 实际 每天 生产 25 台 ， 提前 4 天 完成 了 任务 ． 这 批 电视机 有 多少 台 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16606", "content": "水果店 进来 490 千克 苹果 ， 每 7 千克 装 一箱 ， 已经 卖出 了 40 箱 ， 水果 店里 还有 多少 箱 苹果 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21618", "content": "一 个 直角三角形 的 两条 直角 边 分别 是 3 cm 、 4 cm ， 这个 三角形 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9541", "content": "计算 ： (7/12) - (9/20) + (11/30) - (13/42) + (15/56) - (17/72) = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9105", "content": "电视机厂 今年 生产 电视机 36000 台 ， 去年 产量比 今年 少 (1/4) ， 去年 生产 多少 台 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22180", "content": "一 辆 汽车 按 50.8 千米 / 时 速度 从 甲 城 开往 乙 城 ， 5 小时 后 距 乙 城 还有 90 千米 ． 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "723", "content": "课外 小组 到 海边 捡 贝壳 ， 8 人 1.5 小时 共 捡 贝壳 564 个 ， 平均 每人 每 小时 捡 贝壳 多少 个 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21206", "content": "550 元 可以 帮助 一名 失学 儿童 完成 小学 学业 ， 三年级 5 个 班 的 捐款 正好 能 帮助 4 名 失学 儿童 ， 平均 每个 班 捐 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20277", "content": "我国 人均 水资源 拥有量 是 2200 立方米 ， 比 世界 人均 水资源 拥有量 少 (3/4) ， 世界 人均 水资源 拥有量 = 多少 立方米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8738", "content": "小林 身高 120 厘米 ， 是 表妹 身高 的 2 倍 ， 而 舅舅 身高 是 表妹 的 3 倍 ． 舅舅 比 小林 高 多少 厘米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1285", "content": "工程队 修 一条 路 ， 已修 的 和 未 修 的 长度 比 是 1 ： 5 ， 再 修 490 米 后 ， 已修 的 与 未 修 的 长度 是 比值 恰好 是 3 ． 这 条 路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6595", "content": "小 明 看 一本 小说 ， 第一天 看 的 页数 比 总 页数 的 (1/8) 多 16 页 ， 第 二 天 看 的 页数 比 总 页数 的 (1/6) 少 2 页 ， 还 余下 88 页 ， 这 本书 共有 多少 页 ？ （ 列式 解答 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15510", "content": "7456789 - 7456788 + 7456787 - 7456786 + 7456785 - 7456784 = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "23148", "content": "小 东 每天 早上 跑步 15 分钟 ， 他 的 速度 大约 是 每分钟 跑 125 米 ， 小 东 每天 早上 跑步 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9067", "content": "有 一些 水果 ， 第一天 售出 这些 水果 的 (1/5) ， 第 二 天 售出 余下 的 (4/9) ， 两天 共 售出 这些 水果 的 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20673", "content": "一 个 工厂 有 男 职工 275 人 ， 女职工 的 人数 是 男 职工 的 4 倍 ， 这个 工厂 一共 有 多少 职工 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5311", "content": "一 件 上衣 打 0.7 后 ， 售价 是 210 元 ， 现价 比 原价 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11708", "content": "小 明 要 买 一台 电脑 ． 打 0.8 后 比 原价 便宜 了 400 元 ， 那么 这 台 电脑 原来 的 价格 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18875", "content": "一 个数 除以 6 ， 商 201 ， 余数 1 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3073", "content": "工人 叔叔 挖 一个 长 8 m ， 宽 6 m ， 深 2 m 的 游泳池 ． 如果 游泳池 的 4 周 和 底部 贴 上 瓷砖 ， 至少 需要 多少 平方米 的 瓷砖 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "3721", "content": "1460 - 22 * 18 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11493", "content": "小 明 家 上个月 用电 85 度 ， 每 度 电 的 价格 是 0.42 元 ， 小 明 家 上个月 付 电费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8140", "content": "轧路 机 前轮 直径 1.2 米 ， 每分钟 滚动 6 周 ， 每分钟 能 前进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2896", "content": "冬冬 今年 10 岁 ， 爸爸 今年 40 岁 ， 冬冬 多少岁 时 ， 爸爸 的 年龄 正好 是 冬冬 的 2 倍 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9320", "content": "极地 海洋 世界 有 一头 900 千克 重 的 海象 ， 驯兽师 体重 60 千克 ， 海象 每天 要 吃 36 千克 食物 ． 海象 的 体重 是 驯兽师 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18733", "content": "“ 国庆 ” 节 4 （ 1 ） 班 的 同学 去 郊游 ， 王老师 一共 给 他们 照 了 216 张 照片 ． 一盒 胶卷 能 照 36 张 照片 ， 已知 每盒 胶卷 18 元 ， 王老师 买 这些 胶卷 共 花 了 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13936", "content": "有 两堆 煤 ， 第一 堆 (5/9) 吨 ， 比 第 二 吨 少 (1/4) 吨 ， 两堆 煤 共有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3131", "content": "一 枝 钢笔 售价 5.85 元 ， 比 一枝 圆珠笔 贵 2.43 元 ， 小 明 带 10 元 钱 买 一枝 钢笔 和 一枝 圆珠笔 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10", "content": "一 个 果园 的 李 树 棵 数 是 桃树 的 (7/8) ， 桃树 棵 数 是 梨树 的 (5/6) ． 已知 李树有 1680 棵 ， 梨树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13987", "content": "山东 烟台 是 全国 著名 的 “ 苹果 之 乡 ” ， 其 优良品种 “ 国光 ” 今年 亩产 达到 820 千克 ． 如果 每千克 “ 国光 ” 苹果 的 价格 是 1.2 元 ， 又 知 “ 新星 果园 ” 的 种植 面积 比 去年 扩大 了 6.5 亩 ， 这个 果园 比 去年 多 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15172", "content": "一 堆 煤 重 (4/5) 吨 ， 用 去 (1/5) 吨 ， 用 去 这 堆 煤 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16298", "content": "三年级 148 人 去 参观 动物园 ， 第一批 进去 100 人 ， 剩下 的 分 4 批 进场 参观 ， 剩下 的 平均 每批 进去 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17525", "content": "一 个数 除以 4 ， 商 正好 是 36 ， 没有 余数 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7011", "content": "一 条 水渠 ， 长 1200 m ， 已经 修 了 (1/5) ， 还 剩 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4066", "content": "菜市场 运 来 韭菜 15 千克 ， 运 来 的 西红柿 是 韭菜 的 16 倍 ， 两种 蔬菜 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22547", "content": "吴 新 去年 的 身高 是 147 厘米 ， 今年 比 去年 高 了 (1/21) ， 今年 长 高 了 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1958", "content": "学校食堂 运 来 大米 和 面粉 各 6 袋 ， 大米 每 袋 50 千克 ， 面粉 每 袋 25 千克 ， 大米 比 面粉 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6008", "content": "一 根 电线杆 长 4 米 ， 埋入 地下 的 部分 占 (1/3) ， 露 在 地上 的 部分 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6422", "content": "一 个 足球 打 0.9 后 是 61.2 元 ， 原价 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20636", "content": "王大爷 带 了 900 元 去 买 化肥 ． 买 了 15 袋 化肥 ， 还 剩 30 元 ． 每 袋 化肥 的 价格 = 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5194", "content": "某 工程队 承包 一条 水管 安装 工程 ， 原 计划 每天 安装 0.48 千米 ， 35 天 完成 ， 实际 每天 多 安装 0.12 千米 ， 实际 安装 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1475", "content": "某 工厂 计划 生产 机器 零件 24000 个 ， 已经 生产 了 18600 个 ， 其余 的 每天 生产 270 个 ， 还 需要 多少 天 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6365", "content": "4 与 (1/2) 的 差 除以 它们 的 和 ， 商 = ？ （ 列 综合 算式 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21149", "content": "公园 里 有 水杉 22 棵 ， 松树 的 棵 树 比 水杉 的 3 倍 多 6 棵 ． 水杉 和 松树 一共 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14405", "content": "皮鞋厂 原 计划 生产 皮鞋 4800 双 ， 现在 要 多 生产 600 双 ， 而且 要 在 30 天 内 完工 ， 平均 每天 要 生产 多少 双 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6569", "content": "甲 、 乙 、 丙 3 个数 相加 的 和 为 70 ， 甲 数 减去 乙 数 的 差 正好 与 丙 数 相等 ， 甲 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9312", "content": "一 个数 的 倒数 是 (1/8) ， 这个 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17812", "content": "商店 运 来 500 千克 桔子 ， 比 香蕉 多 3 箱 ， 已知 每箱 桔子 20 千克 ， 每箱 香蕉 重 26 千克 ， 运 来 的 香蕉 一共 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8599", "content": "某 制衣厂 要 生产 540 件 上衣 ， 共 做 了 7.5 天 ， 平均 每天 做 上衣 多少 件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "921", "content": "甲 、 乙 两车 从 相距 600 千米 的 两地 同时 开出 ， 4 小时 后 相遇 ． 甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7470", "content": "0.5 除 一个 数 的 1.2 倍 ， 商 是 9.6 ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5354", "content": "育苗 小学 5 年 （ 1 ） 班 有 6 个 组 每组 8 人 ． 全班同学 帮助 学校 搬运 红砖 1728 块 ， 平均 每人 搬运 红砖 （ 多少 ） 块 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2019", "content": "水果店 运 来 750 千克 梨子 ， 上午 卖出 255 千克 ， 下午 卖出 407 千克 ， 还 剩 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19506", "content": "两个 数 相减 差 是 25.2 ． 现在 被减数 增加 6.4 ， 减数 减少 2.6 ， 差 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13649", "content": "修 一条 水渠 ， 已经 修 了 16 天 ， 每天 修 37 米 ， 还有 146 米 没有 修 ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20797", "content": "截止 2008 年 ， 我市 共 获得 温州 名牌产品 75 个 ， 获得 浙江 名牌产品 数 是 获得 温州 名牌产品 数 的 (7/15) ， 获得 中国 名牌产品 数 是 获得 温州 名牌产品 数 的 (1/25) ， 获得 浙江 名牌产品 的 有 几个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12180", "content": "六年级 同学 科技 小 制作 285 件 ， 比 三年级 的 2 倍 还 多 25 件 ， 三年级 同学 有 科技 小 制作 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7058", "content": "有 12 千克 白糖 ， 每 (1/2) 千克 包 成 一包 ， 可以 包 多少 包 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16215", "content": "我国 的 长江 是 世界 第 3 大河 ， 全长 仅 比 世界 第一 大河 - 南美洲 的 亚马逊河 少 (1/46) ， 亚马逊河 全长 6440 千米 ， 长江 全长约 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9801", "content": "甲 数 的 (2/3) 等于 乙 数 的 (4/9) ， 甲 数 是 60 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17749", "content": "一 辆 汽车 行驶 的 速度 是 63 千米 / 时 ， 行驶 945 千米 ， 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21531", "content": "小 明 到 电脑 柜台 购买 光盘 ， 他 所 带 的 钱 如果 买 3 张 光盘 多 5.82 元 ， 如果 买 8 张 光盘 少 2.93 元 ． 每张 光盘 的 价格 = 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2008", "content": "同学 们 分成 4 组 做 风车 ， 每组 做 了 8 只 ， 送给 幼儿园 小朋友 18 只 ， 还有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6304", "content": "商店 运 来 苹果 20 筐 ， 每 筐 15 千克 ， 运 来 的 橘子 比 苹果 多 (2/5) ． 运 来 橘子 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11971", "content": "小 玲 的 体重 是 31.5 kg ， 小强 的 体重 比 小 玲 的 2 倍 少 8.6 kg ， 小强 的 体重 有 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19675", "content": "小 明 把 500 元 存入 银行 3 年 ， 年利率 为 8% ， 那么 3 年 后 他 可以 得到 本息 多少 （ 按 5% 纳税 ） ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "10351", "content": "一 辆 卡车 载重量 8 吨 ， 有 40 吨 货物 ， 这 一辆 卡车 几次 能 运 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2995", "content": "小 明 每分钟 做 9 道口 算题 ， 小 刚 每分钟 做 的 是 小 明 的 3 倍 ． 小 刚 每分钟 比 小 明 多 做 几道 口 算题 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17973", "content": "县 教育 和 科技局 组织 学生 参观 黎平 会议 会址 ． 上午 去 了 33 批 学生 ， 每批 169 人 ， 下午 又 去 了 123 人 ， 这 一天 共有 多少 学生 去 参观 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2952", "content": "小 明 家 要 粉刷 客厅 的 4 周 墙壁 及 天花板 ． 已知 客厅 长 6 m ， 宽 5 m ， 高 3 m ， 扣除 门窗 面积 10.4 m ^ 2 ． 如果 每平方米 需要 5.4 元 工料 费 ， 粉刷 客厅 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "11095", "content": "一 辆 自行车 的 速度 是 18 千米 / 时 ， 一架 飞机 的 速度 比 自行车 的 25 倍 还 多 16 千米 ， 求 飞机 的 速度 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7733", "content": "甲 、 乙 两个 修路 队 合 修 一条 长 480 米 的 路 ， 两队 同时 从 两端 开工 ， 6 天 刚好 修 完 ． 已知 甲队 每天 修 45 米 ， 乙 队 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15517", "content": "某班 共有 学生 40 人 ， 男女生 人数 的 比 是 5 ： 3 ， 女生 有 多少 人 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7289", "content": "学校 图书馆 科技 书 占 图书 总数 的 25% ， 故事书 占 图书 总数 的 15% ， 科技 书 和 故事书 一共 有 12800 本 ， 学校 共有 图书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5593", "content": "甲 车 每 小时 行 80 千米 ， 乙 车 每 小时 比 甲 车 多行 5 千米 ， ab 两地 相距 595 千米 ， 乙 车 从 a 地 出发 到 b 地 需要 几小时 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "156", "content": "现在 ， 1 美元 可以 兑换 人民币 6.83 元 ， 王 叔叔 有 30 美元 ， 可以 兑换 人民币 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11734", "content": "商店 有 糖果 48 千克 ， 每 (1/2) 千克 装 一袋 ． 卖 了 总 袋 数 的 (5/6) ， 卖 了 多少 千克 糖果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8194", "content": "1.75 升 装 的 大桶 牛奶 ， 如果 平均 每 0.25 升 倒 一杯 ， 一共 能 倒 多少 杯 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18064", "content": "把 一根 木料 锯 成 3 段 要 用 4 分钟 ， 锯 成 8 段 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7082", "content": "一 辆 汽车 3 小时 行 了 135 千米 ， 一架 飞机 飞行 的 速度 是 汽车 的 28 倍 还 少 60 千米 ， 这 架飞机 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10954", "content": "某 商店 按 一元 钱 2 千克 买进 若干 千克 黄瓜 ， 如果 按 每千克 0.6 元 卖出 一半 又 60 千克 后 ， 这时 成本 全部 收回 ． 买进 黄瓜 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9693", "content": "有 甲 、 乙 两筐 苹果 ， 其中 乙 筐 重 26 千克 ． 现在 从 甲 筐 取出 一些 放入 乙 筐 ， 使 乙 筐 苹果 是 甲 筐 的 2 倍 重 ， 这时 甲 筐 还 剩下 18 千克 ． 原来 甲 筐 里 有 多少 千克 苹果 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6198", "content": "甲 、 乙 两 汽车 从 两地 相向 行驶 ． 甲 车 每 小时 行 75 千米 ， 乙 车 每 小时 行 69 千米 ， 甲 车 开出 2 小时 后 ， 乙 车 才 开出 ， 又 过 了 3 小时 两车 相遇 ． 两地 间 距离 = 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15774", "content": "修 一条 24 千米 的 高速公路 ， 已经 修 了 21 千米 ， 修 了 全长 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4513", "content": "有 一种 款式 的 mp3 ， 打 0.3 出售 比 原价 便宜 了 196 元 ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5482", "content": "一 辆 汽车 用 每 小时 100 千米 的 速度 从 甲地 开 到 乙地 ， 比 原 计划 提前 l 小时 到达 ； 用 每 小时 60 千米 的 速度 从 甲地 开 到 乙地 比 原 计划 迟到 1 小时 ； 原 计划 开 多少 小时 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2484", "content": "盘子 里 有 一些 糖 ， 小巧 吃掉 了 这些 糖 的 (2/3) ， 还 剩下 5 粒 糖 ， 盘子 里 原来 有 多少 粒 糖 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5616", "content": "一 家 商场 的 “ 元旦 大 促销 ” 活动 中 ， 原价 1000 元 的 洗衣机 ， 打 0.85 出售 ， 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3181", "content": "2007 年 4 月 我国 火车 第 6 次 提速 ， 某 火车 干线 上 火车 速度 从 平均 每 小时 160 千米 提高 到 平均 每 小时 200 千米 ． 火车 速度 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1565", "content": "学校 举办 一次 艺术品 展览 ， 每个 学生 准备 布料 0.75 米 ， 布料 每 米 售价 为 4.6 元 ， 如果 5 （ 2 ） 班 有 学生 50 人 ， 买 布料 共 花 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10897", "content": "某村 畜牧场 养鸡 68 只 ， 养 的 鸭 比 鸡 多 16 只 ， 养 的 鹅 是 鸭 的 15 倍 ， 养 的 鹅 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5443", "content": "5 （ 2 ） 班 今天 有 48 人 出勤 ， 出勤率 是 96% ． 这 班 共有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14063", "content": "新华书店 有 900 本 故事书 ， 卖 了 4 天 后 还 剩下 640 本 ， 平均 每天 卖 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17027", "content": "一 口 水井 ， 水面 的 高度 占 井 深 的 60% ， 已知 水面 距离 井口 有 8 米 ， 这 口 井 深 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1766", "content": "两个 因数 的 积 是 390 ， 其中 一个 因数 是 26 ， 另 一个 因数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14160", "content": "在 口袋 里 共 放 20 个 红球 和 黄 球 ， 要 让 摸 到 红球 的 可能性 是 (1/4) ， 应 放 多少 个 黄 球 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14213", "content": "18 / 4120 与 3148 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13593", "content": "妈妈 买 了 一条 裤子 ， 这 条 裤子 打 0.8 后 的 售价 是 60 元 ． 它 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6132", "content": "0.78 加上 多少 个 0.01 ， 结果 是 1 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14162", "content": "一 个 长 、 宽 、 高 分别 为 8 dm 、 6 dm 、 4 dm 的 长方体 水箱 ， 水箱 里 水深 是 2.5 dm ， 这些 水 所 占 空间 为 ： 多少 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3422", "content": "15 个 圆钉 大约 重 10 克 ， 多少 个 圆钉 大约 重 20 克 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2481", "content": "一 件 上衣 的 售价 是 480 元 ， 比 原价 降低 了 20% ， 降价 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23100", "content": "甲乙 两车 从 ab 两地 同时 出发 ， 相向 而 行 3 小时 后 ， 甲 车行 到 全程 的 (3/7) 处 与 乙 车 相遇 ， 已知 甲 车 每 小时 行 30 千米 ， 乙 车行 完全 程 要 (21/4) 小时 ， 求 ab 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2849", "content": "王师傅 和 李师傅 要 做 300 个 零件 ， 王师傅 每 时 做 16 个 ， 李师傅 每 时 做 14 个 ． 李师傅 先 做 了 60 个 后 ， 余下 的 两 人 合 做 ， 还要 多少 小时 才能 做 完 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22507", "content": "粮店 运 来 25 袋 面粉 和 60 袋 大米 ， 共 重 3650 千克 ， 已知 每 袋 面粉 重 50 千克 ， 每 袋 大米 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20532", "content": "56 / 7 的 商 再 乘 12 ， 积 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18885", "content": "水 是 由 氢 和 氧 按 1 ： 8 的 质量 比 组成 的 ， 一瓶 重 432 克 的 水 ， 氧 的 质量 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18741", "content": "学校 图书馆 买来 一批 新书 ． 其中 科普读物 126 本 ， 正好 是 连环画 的 3 倍 ． 两种 书 一共 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13455", "content": "学校 图书馆 有 故事书 230 本 ， 比 科技 书 多 70 本 ， 连环画 的 本 数 是 科技 书 的 3 倍 ． 连环画 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15604", "content": "《 数学家 的 故事 》 原价 25 元 ， 打 0.8 出售 ， 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22446", "content": "菜籽 的 出油率 是 30% ， 30 吨 菜籽 可以 炸 出 多少 吨 菜籽油 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21032", "content": "育才 小学 六年级 有 学生 107 人 ， 占 全校学生 数 的 (1/5) ， 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10160", "content": "一 批 零件 ， 25 个 工人 20 天 可以 完成 ． 现在 想 用 10 天 时间 完成 ， 需要 多少 个 工人 ？", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20190", "content": "美 羊 羊 读 一 本书 ， 她 从 第 3 页 读 到 第 9 页 ， 一共 读 了 多少 页 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4006", "content": "液化 石油气 每瓶 原价 75 元 ， 现在 涨价 14% ， 涨价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8449", "content": "水果店 进来 36 箱 香蕉 ， 每箱 香蕉 重 25 千克 ， 每千克 卖 4 元 ， 全部 卖完 可 卖 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20777", "content": "甲 、 乙 两 人 环湖 同 向 竞走 ， 环湖 一周 的 长度 是 900 米 ， 甲 每分钟 走 60 米 ， 乙 每分钟 的 速度 比 甲 的 2 倍 少 30 米 ， 乙 在 甲 前面 180 米 ， 问 ： 经过 多少 分钟 后 两 人 第一次 相遇 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20382", "content": "小 泓 对 低年级 同学 的 上学 方式 进行 了 调查 统计 ， 通过 家长 接送 的 有 135 人 ， 占 总 调查 人数 的 90% ． 小 泓 调查 了 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18843", "content": "商店 运 来 水果 180 千克 ， 其中 苹果 占 (1/5) ， 桔子 占 (1/4) ， 苹果 和 桔子 共有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21741", "content": "从 70.2 里 连续 减去 5.4 ， 减 多少 次 正好 减 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1580", "content": "5 支 钢笔 比 8 支 圆珠笔 贵 5.4 元 ， 每支 圆珠笔 的 价钱 是 1.2 元 ， 每支 钢笔 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5977", "content": "故事书 有 729 本 ， 科技 书 的 本 数 是 故事书 的 (8/9) ， 漫画书 是 科技 书 的 (5/6) ． 如果 买 其中 最少 的 一种 书 ， 需要 买 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7416", "content": "小 明 读 一 本书 ， 第一天 读 了 全书 的 (1/6) ， 第 二 天 读 了 全书 的 (1/4) ， 第 3 天 他 正好 应从 第 151 页 读 起 ， 这 本书 共有 多少 页 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15213", "content": "某校 四年级 一个班 有 42 人 ， 全班 都 订 了 杂志 ， 订 《 小学生 世界 》 的 有 38 人 ， 订 《 中华 好 少年 》 的 有 24 人 ． 两种 杂志 都 订 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20600", "content": "树林 里 有 槐树 457 棵 ， 桑树 比 槐树 少 169 棵 ． 树林 中 的 槐树 和 桑树 一共 有 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13327", "content": "通讯员 原 计划 2.5 小时 行 60 千米 ， 实际 只用 了 2 小时 ． 实际 每 小时 多行 多少 千米 ？ 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9544", "content": "一 辆 汽车 行 了 全程 的 (5/6) ， 距离 终点 还有 30 千米 ， 全程 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16927", "content": "学校 新 购进 一批 图书 分 放在 两个 书架上 ， 甲 书架 放 这 批 图书 的 (3/8) ， 乙 书架 比 甲 书架 多 放 80 本 ， 这 批 图书 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3736", "content": "一 个 环形 ， 如果 内 圆 的 半径 是 2 厘米 ， 环形 的 宽度 是 1 厘米 ， 那么 环形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "+", "-", "^"], "difficulty": 0.4, "length": 11}
-{"question_id": "18635", "content": "果园 里 有 桃树 330 棵 ， 苹果树 的 数量 是 桃树 的 5 倍 ， 梨树 比 苹果树 少 110 棵 ， 梨树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19624", "content": "小 丽 把 积攒 的 400 元 零花钱 存入 银行 ， 定期 5 年 ， 年利率 是 2.88% ． 利息 的 税金 是 20% ． 到期 后 把 税后 利息 捐赠 给 贫困 失学 儿童 ， 她 能 捐 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17320", "content": "水果店 运 来 香蕉 、 菠萝 各 8 箱 ． 香蕉 每箱 35 千克 ， 菠萝 每箱 20 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12410", "content": "小 明 看 一本 故事书 ， 每天 看 18 页 ， 7 天 只 看 了 这 本书 的 一半 ， 从此 后 他 每天 多 看 3 页 ， 小 明 看 完 这 本书 共用 了 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7171", "content": "师徒俩 同时 加工 一批 零件 ， 经 12 小时 后 ， 师傅 比 徒弟 多 加工 36 个 ． 如果 徒弟 每 小时 加工 零件 24 个 ， 师傅 每 小时 加工 零件 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10035", "content": "一 个数 增加 它 的 20% 以后 是 360 ， 这个 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11787", "content": "多少 吨 的 (7/20) 是 42 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2605", "content": "甲乙 两地 相距 441 千米 ， 客车 每 小时 行驶 50 千米 ， 比 货车 快 2 千米 ， 两车 同时 从 甲 、 乙 两地 开出 ， 经过 多少 小时 两车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10234", "content": "甲乙 两地 之间 的 公路 路程 是 804 千米 ， 一辆 货车 和 一辆 轿车 同时 从 两地 出发 ， 相向 而 行 ， 途中 货车 停车 修理 了 1.2 小时 ， 结果 轿车 经过 5 小时 与 货车 相遇 ， 轿车 平均 每 小时 行 100 千米 ， 货车 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9062", "content": "一 次 10 分钟 的 知识 竞赛 ， 小 明 每分钟 能 做 15 道 题 ， 但 做 3 道 错 一道 ， 而且 他 做 2 分钟 要 休息 1 分钟 ， 那么 小 明 这次 竞赛 做 对 了 多少 道 题 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4840", "content": "今天 妈妈 买 了 两种 水果 ， 买 梨花 了 3.50 元 ， 买 苹果花 了 4.80 元 ． 妈妈 今天 买 水果 共 花 了 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6583", "content": "学校食堂 运 来 一车 煤 ， 原 计划 每天 烧 0.25 吨 ， 可以 烧 24 天 ， 现在 改进 锅炉 技术 ， 每天 节约 0.05 吨 ， 现在 ， 这 车 煤 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5360", "content": "青龙镇 今年 种 玉米 32 公顷 ， 种 的 玉米 比 水稻 面积 的 (2/7) 少 8 公顷 ． 青龙镇 今年 种 水稻 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6894", "content": "王 叔叔 买 了 一辆 价值 12000 元 的 摩托车 ． 按规定 ， 买 摩托车 要 缴纳 10% 的 车辆 购置税 ． 王 叔叔 买 这辆 摩托车 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "393", "content": "a 、 b 两座 城市 相距 1075 千米 ． 两辆 汽车 同时 从 甲 城 和 乙 城 出发 ， 相向 而 行 ， 每 小时 分别 行 120 千米 和 95 千米 ． 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15368", "content": "多少 的 倒数 是 0.5 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14328", "content": "一 个数 除以 25 商 4 余 3 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20976", "content": "南京 地铁 一期 工程 分 高架 线 和 地下 线 两 部分 ． 其中 高架 线 长 约 6.5 千米 ， 地下 线 的 长度 比 高架 线 的 1.4 倍 还 多 0.21 千米 ． 地下 线 全长约 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15530", "content": "小 明 家 的 鸡 的 只 数 是 鸭 的 只 数 的 (4/5) ， 鸭 的 只 数 是 鹅 的 只 数 的 (2/3) ． 已知 鸡 有 48 只 ， 鹅 有 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8348", "content": "工程队 修 一条 公路 ， 第一天 修 了 全长 的 (5/24) ， 第 二 天 修 了 全长 的 (1/8) ， 还有 多少 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4970", "content": "我校 新建 的 “ 宏志 ” 教学楼 有 4 层 ， 每 层楼 有 9 间 教室 ． 如果 每间 教室 能 容纳 50 位 同学 ， 这 座 教学楼 共 可 容纳 多少 位 同学 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10948", "content": "一 种 洗衣机 现在 每 台 售价 是 960 元 ， 比 原来 降低 了 (5/21) ， 原来 每 台 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5254", "content": "一 辆 汽车 从 沈阳 开往 大连 ， 4 小时 后 行 了 480 千米 ． 照 这样 的 速度 ， 再行 3 小时 才能 到 大连 ． 沈阳 到 大连 有 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22964", "content": "一 架 天平 的 左边 秤 里 放 着 一包 水果糖 ， 右边 秤盘 里 放 着 (2/3) 包 同样 的 水果糖 和 100 克 砝码 ， 这时 天平 平衡 ， 问 一包 水果糖 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7370", "content": "甲乙 两 人 从 相距 150 米 的 两地 同时 同 向 行走 ， 甲 在 前面 每分钟 走 65 米 ， 在 后面 每分钟 走 75 米 ， 几分钟 后 乙 可以 追 上 甲 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19420", "content": "一 个 环形 跑道 长 400 米 ． 小 红 和 小 明 同时 同 地 同 向 而 行 ， 小 红 每分钟 跑 280 米 ， 小 明 每分钟 跑 320 米 ． 多少 分钟 后 小 明 第一次 遇到 小 红 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16149", "content": "自行车 3 小时 行驶 24 千米 ， 比 小轿车 每 小时 慢 80 千米 ， 小轿车 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17175", "content": "6 一班 同学 布置 宽 6 米 教室 ， 每 (1/3) 米 挂 一个 气球 ， 要 准备 多少 个 气球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12150", "content": "学校 组织 同学 们 看 电影 ， 3 年 （ 2 ） 班 有 54 人 ， 每人 交 6 元 钱 ， 全班 一共 交 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11121", "content": "水果店 有 一些 水果 ， 第一天 卖出 了 (1/4) ， 第 二 天 卖出 了 (2/5) ， 还 剩下 多少 没有 卖 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5479", "content": "学校 新 进 一批 图书 ． 借出 了 40% ， 还 剩 360 本 ， 学校 新 进 图书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20648", "content": "一 个 工厂 扩建 计划 投资 500 万元 ， 实际 节约 了 45 万元 ， 节约 投资 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20115", "content": "一 段 布 剪 去 它 的 (2/3) ， 还 剩 30 米 ， 这 段 布 原有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13999", "content": "从 4.05 里 减去 0.8 与 5 的 积 ， 所得 的 差 再 除以 0.5 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3910", "content": "一 条 环行 跑道 长 400 米 ， 甲 每分钟 行 100 米 ， 乙 每分钟 行 50 米 ． 甲 、 乙 两 人 同时 同 地 同方向 出发 ， 问 多长时间 后 他们 再 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19704", "content": "一 个数 的 (3/4) 是 (4/3) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20698", "content": "小 明 看 一 本书 ， 看 了 40% 后 ， 还 剩下 54 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11413", "content": "某 小学 有 男生 560 人 ， 是 女生 人数 的 (14/15) ． 全校 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10992", "content": "图书馆 有 故事书 2400 册 ， 比 科技 书 的 本 数多 (1/5) ． 科技 书 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16111", "content": "某地 平均 年 日照 1200 小时 ， 乙地 年 日照时间 是 它 的 (3/4) ． 乙地 年 日照时间 大约 多少 小时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5373", "content": "水果店 运 来 犁 120 千克 ， 比 苹果 少 30 千克 ， 运 来 的 犁 比 苹果 少 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4453", "content": "李老师 给 参加 数学 竞赛 获奖 的 同学 买 奖品 ， 用 148.8 元 买 了 12 枝 钢笔 ， 每枝 钢笔 值 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13707", "content": "甲 、 乙 两 人 赛跑 ， 甲 跑 到 全程 (2/3) 处 时 ， 乙 跑 的 路程 与 未 跑 的 比 是 3 ： 1 ， 这时 甲乙 两 人 相距 12 千米 ． 问 全程 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4668", "content": "甲乙 两个 鱼缸 共有 金鱼 若干 尾 ， 其中 甲鱼 缸 占 60% ， 从 乙 鱼缸 中 取出 12 尾 放 人 甲鱼 缸 ， 这时 乙 鱼缸 的 金鱼 占 总数 的 (1/4) ， 甲乙 两个 鱼缸 共有 金鱼 多少 尾 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1045", "content": "星星 儿童 制衣厂 原来 做一套 童装 需要 1.8 米 布料 ， 后来 改进 了 裁剪 方法 ， 每套 童装 只 需 1.6 米 布料 ． 原来 准备 做 360 套 童装 的 布料 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16338", "content": "一 个数 除以 9 ， 商 是 27 ， 当 余数 为 最大 时 ， 被除数 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5499", "content": "一 个 服装厂 原来 生产 一套 服装 的 成本 是 160 元 ， 由于 扩大 生产 规模 ， 现在 每套 服装 的 成本 是 136 元 ． 现在 每套 衣服 的 成本 比 原来 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10311", "content": "从 县城 修 一条 公路 到 先锋 村 ， 长 165 千米 ， 工程队 每周 大约 修 15 千米 ， 几周 能 完成 任务 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22408", "content": "三年级 学生 为 希望 小学 捐书 ， 捐出 的 书 每 45 本 包 一包 ， 包 了 14 包 ， 还 多出 35 本 ， 三年级 学生 一共 捐 了 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4722", "content": "一 个 水利 队 ， 前 4 天 平均 每天 修水 125 米 ， 后 6 天 每天 修 150 米 ， 这个 水利 队 平均 每天 修 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2975", "content": "一 个 箱子 里 装满 了 实心球 ． 实心球 连 箱子 的 质量 总共 为 12 千克 ． 从 箱 中 取出 实心球 的 (1/4) 后 ， 剩下 的 实心球 连 箱子 的 质量 总共 为 9.5 千克 ． 这个 箱子 的 质量 为 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12318", "content": "湖面 上 有 84 只 鹅 ， 其中 有 29 只是 灰鹅 ， 其余 的 都 是 白鹅 ． 白鹅 比 灰鹅 多 多少 只 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2507", "content": "小 明 从 家 走 到 学校 要 15 分钟 ， 他 步行 的 速度 大约 是 50 米 / 分 ， 小 明 家 离 学校 大约 有 多少 米 ？ ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21471", "content": "图书 角 有 连环画 24 本 ， 故事书 15 本 ． 借出 32 本 后 ， 还 剩 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12273", "content": "妈妈 从 超市 买回来 5.2 千克 大米 和 1.45 千克 瘦肉 ， 一 共用 去 31.38 元 ． 知道 大米 每千克 1.35 元 ， 瘦肉 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10244", "content": "有 一块 白菜 地 ， 已 收 了 20% 正好 是 2000 千克 ， 这块 地 大约 收 白菜 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9155", "content": "为 庆祝 国庆节 ， 百货商场 的 一种 洗衣机 每 台 按 原价 的 0.85 出售 ， 比 原价 便宜 225 元 ， 这种 洗衣机 原来 一台 的 售价 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19894", "content": "减数 是 (1/12) ， 差 是 (11/12) ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21560", "content": "图书馆 有 科技 书 300 本 ， 文艺 书 的 本 数 比 科技 书 多 150 本 ． 连环画 的 本 数 是 科技 书 与 文艺 书 总和 2 倍 ， 图书馆 有 多少 本 连环画 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15154", "content": "某 毛巾厂 十 月份 实际 生产 彩色 方格 毛巾 710 条 ， 比 计划 多 生产 105 条 ， 原 计划 生产 多少 条 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21040", "content": "宇航员 到 了 月球 以后 ， 体重 就 只有 地球 上 的 (1/6) ． “ 航天 英雄 ” 杨利伟 到 了 月球 上 ， 体重减轻 了 50 千克 ． 那么 他 在 地球 上 的 体重 = 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6797", "content": "某村 粮食作物 播种面积 减少 (1/5) ， 要 保持 粮食 总产量 不变 ， 每 公顷 产量 需 增加 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15711", "content": "甲 每 小时 行 9 千米 ， 乙 每 小时 比 甲 少 行 3 千米 ， 两 人 从 相隔 20 千米 的 两地 同时 相 背 而 行 ， 多少 小时 后 两 人 相隔 80 千米 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12829", "content": "李 叔叔 今年 4 月份 在 中国农业银行 存入 4800 元 ， 每月 的 利率 是 0.145% ， 存 满 8 个 月 时 ， 可以 取出 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5650", "content": "食堂 买来 一些 大米 ， 3 天 吃 了 其中 的 (3/5) ， 还 剩下 150 千克 ． 求 这些 大米 共有 多少 千克 ？ 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7452", "content": "王老师 买 了 15 个 篮球 ， 每个 24 元 ， 还 买 了 21 个 足球 ， 每个 45 元 ， 王老师 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18424", "content": "同学 们 排成 一队 ， 共 36 人 ， 每 相邻 两 人 之间 的 距离 是 2 米 ， 那么 这 一 队伍 从头到尾 共 长 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5465", "content": "一 个 长方体 容器 ， 长 30 厘米 ， 比 宽 多 10 厘米 ， 里面 装有 8 厘米 深 的 水 ． 将 一块 铜板 放入 容器 中 浸没 ， 水面 上升 6 厘米 ， 这块 铜板 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19096", "content": "青山 果园 收获 了 300 箱 苹果 和 240 箱 梨 ， 一辆 卡车 每次 能 运 30 箱 ， 这辆 卡车 要 运 多少 次 才能 全部 运 完 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21279", "content": "玩具厂 生产 1800 件 玩具 ， 原 计划 45 天 完成 ， 实际 30 天 完成 ， 实际 每天 比 原 计划 多 做 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22512", "content": "a 瓶 装满水 是 450 克 ， 倒 出 其中 的 (1/5) 正好 装 至 b 瓶 的 (2/3) ， b 瓶 能 装 多少 水 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4933", "content": "水果店 运 来 水果 240 千克 ， 其中 苹果 占 了 (3/8) ， 梨 占 了 (1/4) ， 其余 的 是 橘子 ． 运 来 橘子 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5575", "content": "修 一条 水渠 ， 计划 每天 修 300 米 ， 8 天 修 完 ， 实际 每天 修 400 米 ， 这样 可以 提前 几天 修 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14469", "content": "甲 数 的 4 倍 等于 乙 数 的 5 倍 ， 已知 乙 数 是 0.8 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12328", "content": "甲 车间 比 乙 车间 多 50 人 ， 甲 车间 和 乙 车间 的 人数 比 是 5 ： 4 ， 两 车间 共有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9389", "content": "某 厂 有 男工 125 人 ， 女工 的 人数 比 男工 的 3 倍 还 多 25 人 ， 这个 工厂 有 女工 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9419", "content": "减数 是 280 ， 被减数 是 440 ， 它们 的 差 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8470", "content": "从 上海 开出 一列 北上 的 火车 ， 共有 12 节车厢 ， 平均 每 节车厢 有 旅客 110 人 ． 如果 旅客 中 的 (3/5) 是 去 北京 的 ， 去 北京 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3057", "content": "我们 学校 原 计划 每月 用 煤 180 吨 ， 实际 每月 比 计划 节约 (2/15) ， 实际 每月 用 煤 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8342", "content": "在 一个 加法 算式 里 ， 一个 加数 是 218 ， 和 是 这个 加数 的 5 倍 ， 另 一个 加数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16116", "content": "往 一个 篮子 里 放 鸡蛋 ， 假定 篮子 里 的 鸡蛋 数目 每分钟 增加 1 倍 ， 这样 放下去 ， 10 分钟 时 ， 篮子 放满 了 ． 那么 ， 多少 分钟 时 恰好 放入 半 篮子 鸡蛋 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20522", "content": "小 华 的 邮票 张 数 比 小 红 少 (1/5) ． 如果 小 华 又 增加 6 张 邮票 就 比 小 红 的 邮票 张 数多 (1/10) ， 小 红 有 多少 张 邮票 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17167", "content": "某 娱乐场所 商务 售出 门票 135 张 ， 比 下午 售出 的 多 42 张 ， 今天 一共 售出 门票 多少 张 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2288", "content": "制鞋厂 3 天 生产 4500 双 凉鞋 ， 其中 1200 双 是 塑料 凉鞋 ， 其余 是 皮 凉鞋 ， 皮 凉鞋 比 塑料 凉鞋 多 多少 双 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6230", "content": "甲乙 两 数 的 差 是 12 ， 甲乙 两 数 的 比 是 5 ： 3 ， 那么 甲乙 两 数 的 和 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9255", "content": "在 乘法 里 ， 一个 因数 是 49 ， 积 是 931 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12525", "content": "新光 小学 四年级 人数 是 五年级 的 (4/5) ， 三年级 人数 是 四年级 的 (2/3) ， 如果 五年级 是 120 人 ， 那么 三年级 = 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10106", "content": "一 辆 小轿车 可以 坐 5 人 ， 15 辆 小轿车 可以 坐 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11033", "content": "夕阳红 俱乐部 共有 女 会员 65 人 ， 男 会员 比 女 会员 多 (1/5) ， 男 会员 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4152", "content": "2011 年 3 月 把 5000 元 存入 银行 定期 一年 ， 年利率 是 3.25% ， 一年 后 的 利息 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13108", "content": "爸爸 月工资 是 2580 元 ， 按规定 扣除 1600 元 后 的 余额 部分 ， 按 5% 的 比例 缴纳 个人所得税 ． 爸爸 每月 交税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21996", "content": "水果店 运 来 苹果 2488 千克 ， 是 运 来 的 香蕉 的 4 倍 ， 运 来 的 香蕉 比 橘子 少 307 千克 ． 水果店 运 来 橘子 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4352", "content": "一 辆 本田 轿车 在 国内 的 售价 是 25.48 万元 ， 日本 的 售价 折合 人民币 是 23.15 万元 ． 这种 轿车 在 国内 购买 要 贵 多少 万元 钱 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20943", "content": "夺冠 平台 ： 一盒 粉笔 ， 第一次 用 去 (1/2) ， 第 二 次 用 去 剩下 的 (2/3) ， 一 共用 去 了 几分 之 几 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6249", "content": "一 捆 电线 ， 第一次 用 去 80 米 ， 第 二 次 用 去 余下 的 (3/5) ， 还 剩 12 米 ， 这 捆 电线 原有 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21940", "content": "有 一种 款式 的 mp3 ， 打 0.3 出售 是 84 元 ， 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10410", "content": "箱子 中 有 红 、 白 、 黄色 乒乓球 各 2 个 ， 不用 眼看 伸手 去 摸 球 ， 摸 出 多少 个 球 才能 保证 至少 有 一个 白色 乒乓球 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9757", "content": "甲乙 两地 相距 240 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 (1/3) ， 第 二 小时 行 了 全程 的 (1/4) ， 这辆 汽车 离 甲地 有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21025", "content": "妈妈 将 6000 元 钱 存入 银行 ， 定期 一年 ， 年利率 2.25% ， 利息税 20% ． 到期 后 ， 妈妈 可 从 银行 取回 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "12879", "content": "一 个数 的 6 倍 + 24 ， 结果 是 366 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11946", "content": "一 瓶 墨水 大约 有 (3/50) 升 ， (2/3) 瓶 这样 的 墨水 有 多少 升 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3681", "content": "一 个 机耕 队 用 拖拉机 耕 6.8 公顷 棉田 ， 用 了 4 天 ． 照 这样 计算 ， 再 耕 13.6 公顷 棉田 ， 一共 要 用 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22145", "content": "笑笑 有 12 本 故事书 ， 是 淘气 的 故事书 的 (3/4) ， 淘气 有 多少 本 故事书 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15014", "content": "一 本 科普 书 ， 小 明 第一天 看 了 全书 的 (3/8) ， 第 二 天 读 了 全书 的 (1/3) ， 还 剩下 全书 的 几分 之 几 没有 读 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16263", "content": "水果店 运 来 4 箱 梨 ， 每箱 24 个 ， 一共 运 来 梨 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19240", "content": "一 根 木料 长 8 米 ， 另 一根 比 它 短 (1/4) ， 另 一根 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17698", "content": "钱 老师 这个 月工资 收入 扣除 1600 元 后 ， 按 5% 的 税率 缴纳 个人所得税 30 元 ， 钱 老师 这个 月工资 收入 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14977", "content": "已知 一个 比例式 的 两 外 项 之 积 是 15 ， 一个 内 项 是 (1/3) ， 另 一个 内 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "596", "content": "某 鞋 店老板 为了 提高 销售额 ， 先 将 所有 皮鞋 提价 30% ， 而后 宣传 说 ： “ 为了 回收 资金 ， 所有 皮鞋 0.85 优惠 ． 数量 有限 ， 欲购从速 ． ” 那么 ， 一双 原来 的 标价 200 元 的 皮鞋 ， 现在 实际 售价 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9623", "content": "妈妈 用 10.08 元 钱 买 回 3.6 千克 苹果 ， 每千克 苹果 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10178", "content": "把 一根 木料 锯 成 3 段 要 30 分钟 ， 照 这样 计算 ， 锯 成 5 段 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4985", "content": "3 个 红 圆 片 占 整体 的 (3/8) ， 再 增加 1 个 红 圆 片 ， 这时 红 圆 片 占 整体 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8900", "content": "校园 里 有 君子兰 25 盆 ， 菊花 盆 数 是 君子兰 的 (3/5) ， 吊兰 盆 数 是 菊花 的 (7/3) ， 吊兰 有 多少 盆 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1490", "content": "水果 店员 本月 利润 为 20 万元 ， 比 预计 利润 多 了 4 万 ， 多 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "459", "content": "一 瓶 可乐 5 升 ， 喝 了 (1/2) 升 ， 还 剩 多少 升 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20805", "content": "一 盒 钢笔 10 支 ， 每支 8 元 ， 24 盒 钢笔 装 一箱 ． 一箱 钢笔 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10658", "content": "参加 数学 比赛 的 同学 有 40 人 ． 小 红 和 一起 参加 比赛 的 同学 每人 握 一次 手 ， 一共 握 多少 次 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "465", "content": "粮 店里 原来 有 大米 123 袋 ， 后来 又 运 来 的 大米 袋 数 是 原来 的 2 倍 ， 现在 共有 大米 多少 袋 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10237", "content": "6 年 3 班 有 40 名 同学 ， 每人 都 向 希望工程 捐 了 款 ． 其中 有 一名 同学 捐 了 2.80 元 ． 但是 统计数字 时 把 这个 数字 搞错 了 ， 结果 计算 出 的 全班 平均 每人 捐款 数 比 实际 平均 每人 捐款 数 高 了 0.63 元 ． 统计数字 时 把 这个 数字 当成 了 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7007", "content": "修 一条 4500 米 的 路 ， 已修 了 24 天 ， 平均 每天 修 165 米 ， 还 剩下 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17354", "content": "一 根 钢管 ， 用 去 它 的 (2/5) ， 还 剩 16 米 ； 如果 用 去 它 的 (2/3) ， 还 剩 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1483", "content": "一 场 足球比赛 ， 主队 的 球迷 人数 是 客队 球迷 人数 的 7.5 倍 ， 客队 的 球迷 人数 比 主队 球迷 人数 少 39000 人 ． 客队 的 球迷 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5322", "content": "雷锋 小学 参加 运动会 的 男生 人数 和 女生 人数 的 比 是 5 ： 3 ， 其中 女生 有 36 人 ， 男生 比 女生 多 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6397", "content": "今年 春季 蔬菜 价格 持续 上涨 ， 李 叔叔 购进 大蒜 和 土豆 各 85 筐 ． 大蒜 每 筐 65 千克 ， 土豆 每 筐 75 千克 ． 李 叔叔 一共 购进 蔬菜 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22383", "content": "一 桶 油 连 桶 共 重 40 千克 ． 倒 出 一部分 油 后 ， 桶 里 的 油 还 剩 40% ， 这时 连 桶 称 共 重 19.6 千克 ， 这个 桶 原来 共 装 油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19166", "content": "941 / （ ） = 25 … 16 ， 括号 里 填 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7498", "content": "一 袋 面粉 ， 第一次 用 去 (1/5) ， 第 二 次 用 去 25 千克 ， 刚好 剩下 15 千克 ， 这 袋 面粉 共有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18098", "content": "公园 里 有 柳树 60 棵 ， 比 松树 的 棵 数 少 (2/3) ， 公园 里 有 松树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7847", "content": "一 个 工人 要 将 63 个 零件 装进 两种 盒子 里 ， 每 只 大 盒子 装 12 个 零件 ， 每 只 小盒子 装 5 个 零件 ， 需要 准备 4 个 大 盒子 和 多少 个 小盒子 才能 把 这些 零件 装 下去 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7956", "content": "小 明 从 家 到 学校 和 路程 是 1800 米 ， 平时 走 24 分 ． 一天 他 有 急事 ， 每 分 比 平时 多 走 15 米 ， 这天 小 明 用 多少 分 从 家 走 到 学校 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16494", "content": "狮子 每 小时 跑 60 千米 ， 狐狸 的 速度 是 狮子 的 (3/4) ， 狐狸 的 (13/9) 倍 是 狗 的 速度 ， 狗 每 小时 跑 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10702", "content": "王 叔叔 计划 用 7500 元 买 家用电器 ， 买 冰箱 用 了 2680 元 ， 买 电视机 用 了 3320 元 ， 王 叔叔 还 剩 多少 元 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5347", "content": "小 芳 买 了 2 本 笔记本 和 5 枝 圆珠笔 ， 共用 去 7.5 元 ， 每枝 圆珠笔 0.5 元 ， 每 本 笔记本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2109", "content": "一 堆 煤 ， 计划 每天 烧 1.5 吨 ， 可以 烧 24 天 ． 改进 炉灶 后 ， 平均 每天 节约 煤 0.3 吨 ． 这 堆 煤 现在 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1295", "content": "服装厂 原 计划 做 120 套 西服 ， 每套 西服 用布 4.8 米 ． 改进 剪裁 方法 后 ， 每套 节约 0.3 米 ． 节约 下来 的 布 可 做 多少 套 西服 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20823", "content": "一 辆 汽车 作 加速运动 ， 在 第 1 分钟 内 行驶 了 300 米 ， 从 第 2 分钟 开始 ， 每分钟 都 要 比 前 一分钟 多 行驶 50 米 ， 照 这样 计算 ， 当 汽车 的 速度 达到 每分钟 1200 米 时 ， 这辆 汽车 一共 行驶 了 多少 分钟 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3894", "content": "一 根 绳 ， 第一次 用 去 全长 的 20% ， 第 二 次 用 去 全长 的 30% ， 两次 一 共用 去 了 15 米 ， 这根 绳 原来 有 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22272", "content": "360 里面 有 多少 个 4 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22915", "content": "四年级 200 名 学生 平均 排成 4 列 纵队 去 看 展览 ， 前后 两名 同学 相距 1 米 ． 这 支 队伍 首尾 的 学生 相距 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20453", "content": "小 明 妈妈 买 了 2.5 千克 苹果 和 3 千克 梨 ， 一共 花 19.7 元 ， 每千克 梨 的 价钱 是 3.5 元 ， 每千克 苹果 的 价钱 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3685", "content": "(2/15) 米 是 (2/5) 米 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1812", "content": "水果店 运 来 桔子 和 苹果 共 130 千克 ， 运 来 的 苹果 与 桔子 的 重量 是 5 ： 4 ， 运 来 苹果 多少 千克 ？ 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6108", "content": "运动会 长跑 比赛 ， 8 人 站 在 14 米 长 的 白线 上 ， 如果 每 两 人 之间 的 距离 相等 ， 请问 两 人 之间 的 间隔 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18869", "content": "学校 买来 180 本 图书 ， 其中 文艺 书 占 (1/3) ， 科技 书 占 (1/4) ， 文艺 书 比 科技 书 多 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22518", "content": "游泳池 里 ， 参加 游泳 的 学生 ， 小学生 占 30% ， 又 来 一批 学生 后 ， 学生 总数 增加 20% ， 小学生 占 学生 总数 的 40% ， 小学生 增加 百分之几 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18904", "content": "学校 买 了 排球 36 个 ， 比 足球 个数 的 3 倍 还 多 6 个 ， 学校 买 了 多少 个 足球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4008", "content": "一 条 塑料绳 长 4.5 米 ， 第一次 剪 去 全长 的 40% ， 第 二 次 剪 去 (2/5) 米 ， 这 条 塑料绳 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14161", "content": "一 个数 的 (3/5) 是 30 的 (1/6) ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19851", "content": "加工 6000 个 零件 ， 甲 车间 单独 加工 需要 30 天 完成 ， 乙 车间 单独 加工 每天 加工 300 个 ， 现在 两个 车间 共同 加工 只要 几天 就 能 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14634", "content": "72 个 2 相加 的 和 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11630", "content": "(12/33) / (3/11) = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13064", "content": "笑笑 在 蛋糕店 买 2 个 面包 花 了 14 元 ． 笑笑 班 56 名 学生 春游 ， 如果 每人 都 买 一个 这样 的 面包 ， 一共 要 付 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16128", "content": "妈妈 买 苹果 用 去 14.6 元 ， 买 橘子 用 去 27.56 元 ， 付给 售货员 50 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18832", "content": "明明 读 一本 课外书 ， 第一天 读 了 12 页 ， 以后 每天 比 前一天 多 读 6 页 ， 最后 一天 读 了 48 页 ， 他 共 读 了 几天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16720", "content": "王 阿姨 从 邮局 给 在外 地上 大学 的 儿子 汇款 600 元 ， 按照 规定 ， 汇费 是 汇款 数 的 2% ． 王 阿姨 应付 汇费 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16132", "content": "一 种 服装 现价 是 140 元 ， 比 原价 降低 了 (2/7) ． 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2723", "content": "一 列 火车 从 甲 站 开往 乙 站 ， 每 小时 行驶 64 千米 ， 行驶 了 (3/4) 小时 ， 正好 通过 全程 的 (8/25) ． 甲 、 乙 两站 间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16420", "content": "一 块 地 (9/20) 公顷 ， 用 3 台 拖拉机 来 耕 ， (3/5) 小时 可以 耕 完 ． 平均 每 台 拖拉机 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2473", "content": "商店 有 4 筐 苹果 ， 每 筐 55 千克 ， 已经 卖出 135 千克 ， 还 剩 多少 千克 苹果 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7096", "content": "把 一个 长 9 分 米 ， 宽 3 分 米 的 纸卷 成 一个 圆柱 ． 圆柱 的 侧 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19633", "content": "一 个 等腰三角 形 周长 80 分 米 ， 一条 腰 与 底 的 比 是 3 ： 2 ． 它 的 底 = 多少 分 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5115", "content": "小 红 家养 了 鹅 130 只 ， 鸭 的 只 数 是 鹅 的 2 倍 ， 鸡 的 只 数 比 鹅 和 鸭 的 总数 少 50 只 ， 鸡 有 多少 只 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17645", "content": "有 一堆 糖果 ， 其中 奶糖 占 45% ， 再 放入 16 块 水果糖 后 ， 奶糖 就 占 25% ， 那么 ， 这 堆 果糖 中 有 奶糖 多少 块 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20215", "content": "小 红 看 一本 《 童话 小说 》 ， 看 了 90 页 ， 还 剩 30 页 没有 看 ， 已 看 的 页数 比 剩下 的 页数 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17294", "content": "5 / 12 的 商 可用 分数 表示 为 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20701", "content": "学校 买来 4 箱 图书 ， 每箱 80 本 ， 平均 分给 5 个 年级 ， 平均 每个 年级 多少 本 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9866", "content": "小 华 骑 自行车 15 分钟 行 了 3000 米 ， 平均 每分钟 行 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3323", "content": "一 堆 货物 已经 运走 了 (3/8) ， 还 剩 几分 之 几 没 运走 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12184", "content": "两筐 苹果 单价 相同 ， 甲 筐 苹果 重 64 千克 ， 乙 筐 苹果 重 48 千克 ， 两筐 都 卖出 一部分 后 ， 剩下 的 苹果 重量 相等 ， 已知 乙 筐 比 甲 筐 少卖 了 56 元 ， 甲 筐 苹果 可 卖 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13406", "content": "燕子 每 小时 飞行 150 千米 ， 是 汽车 速度 的 (15/4) ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8009", "content": "今年 北京市 人均 公共绿地 面积 是 12 平方米 ， 预计 明年 比 今年 增加 5% ， 预计 明年 北京市 人均 公共绿地 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20774", "content": "小 明 买 了 一本 15.3 元 的 辅导书 ， 付出 50 元 钱 ， 售货员 应 找回 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13311", "content": "国家 规定 ， 某种 汽油 每吨 涨价 1000 元 后 卖 6000 元 每吨 ， 汽油 每吨 价格上涨 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15612", "content": "做一套 学生装 用布 (2/3) 米 ， 现有 布 240 米 ， 用 它 的 (5/6) 做 学生装 ， 可以 做 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1951", "content": "小林 身高 1.33 米 ， 他 站 在 0.5 米 高 的 凳子 上 时 ， 比 爸爸 高 0.07 米 ， 爸爸 身高 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2490", "content": "除数 是 7 ， 商 是 6 ， 余数 是 4 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3675", "content": "一 个数 的 (5/8) 比 20 少 4 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4832", "content": "李师傅 改进 技术 后 ， 每天 制造 零件 120 个 ， 比 原来 每天 多 生产 (1/5) ， 李师傅 原来 每天 制造 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2684", "content": "公司 准备 包 一辆 大客车 送 家住 外地 的 员工 回家 过年 ， 包车费 是 固定 的 ． 根据 外地 员工 人数 统计 ， 每人 需 出 15 元 ． 后来 知道 有 6 名 外地 员工 不 回去 ， 这样 每人 需 多出 3 元 ． 包车费 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12589", "content": "学校 举行 “ 小 制作 ” 比赛 ． 三年级 有 60 人 参赛 ， 比 四年级 的 人数 少 15 人 ， 五年级 参赛 的 人数 是 3 、 四年级 参赛 总 人数 的 2 倍 ． 五年级 有 多少 人 参赛 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16367", "content": "一 辆 货车 从 甲地 开往 乙地 ， 去 时 速度 是 54 千米 / 时 ， 去 时 用 了 12 小时 ． 返回 时 速度 是 72 千米 / 时 ， 返回 时 用 了 多少 时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9014", "content": "学校 运 来 200 棵 树苗 ， 老师 栽 了 10% 后 ， 余下 的 按 5 ： 4 分配 给 5 、 6 两个 年级 栽 ， 六年级 分 到 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4630", "content": "同学 们 排队 做操 ， 小 明 前面 有 26 个人 ， 后面 有 19 个人 ， 这 一排 一共 有 多少 个人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14012", "content": "汽车 沿着 盘山公路 翻越 一座 大山 ， 全长 120 千米 ． 已知 汽车 上山 的 速度 是 每 小时 30 千米 ， 下山 的 速度 是 每 小时 40 千米 ． 汽车 往返 一次 需 多少 小时 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16538", "content": "一 个 平行四边形 的 底 是 12 厘米 ， 高 是 5 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11623", "content": "在 创建 “ 绿荫 校园 ” 植树 活动 中 ， 某日 ， 有 15 名 同学 先 到 学校 ， 班长 宣布 ： “ 我们 每人 正好 植 7 棵 树 ” ， 这时 就 又 来 了 一些 同学 ， 班长 马上 重新分配 任务 说 ： “ 现在 我们 平均 每人 只 需要 植 5 棵 树 就 完成 任务 了 ” ． 实际 参 ． 加 植树 的 同学 有 几名 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11868", "content": "学校 运动会 团体操 表演 有 90 人 参加 表演 ， 共 分 5 个 方阵 ， 每个 方阵 站 3 行 ． 每行 站 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22883", "content": "博物馆 举行 书画 作品展 ， 第一天 有 326 人 参加 ， 第 二 天 参加 的 人数 是 第一天 的 3 倍 还 多 22 人 ， 两天 一共 有 多少 人 参加 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13836", "content": "一 个数 的 (2/5) 比 它 的 30% 多 210 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14027", "content": "张 大爷 从 北京 到 上海 ， 3 小时 行 了 全程 的 25% ， 行 完全 程 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3267", "content": "菜场 运进 青菜 1600 千克 ， 是 萝卜 的 4 倍 ， 运进 萝卜 比 菠菜 少 380 千克 ， 运进 菠菜 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10335", "content": "甲 、 乙 两车 同时 从 两地 相向 而 行 ， 当 甲 车行 了 全程 的 60% 时 ， 乙 车 正好 行 了 全程 的 75% ， 这时 两车 相距 140 千米 ． 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2745", "content": "小强 买 了 6 枝 圆珠笔 用 去 9 元 钱 ， 用 15 元 钱 买 同样 的 圆珠笔 ， 能 买 几枝 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4974", "content": "养鸡场 运 来 500 袋 饲料 ， 喂鸡 用 了 128 袋 ， 喂猪 用 了 343 袋 ， 还 剩下 多少 袋 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14991", "content": "小巧 双休日 背 了 64 个 英语单词 ， 是 小 亚 背 的 单词 数 的 4 倍 ， 小 亚 背 了 多少 个 单词 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12216", "content": "一 个数 比 495 多 28 ， 这个 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18215", "content": "商店 有 黄 气球 19 个 ， 红 气球 比 黄 气球 少 7 个 ， 花 气球 的 个数 是 红 气球 的 2 倍 ， 花 气球 有 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12735", "content": "养鸡 厂 今年 养鸡 21000 只 ， 今年 比 去年 增加 (2/5) ， 去年 养鸡 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10005", "content": "一 捆 电线 ， 用 了 60% ， 正好 用 了 120 米 ， 还 剩 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15636", "content": "小 明说 ： “ 我 每天 做 5 页 练习册 ， 共用 (4/21) 小时 ， 做 一页 练习册 要 用 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "677", "content": "从 265 里面 减去 一个 数 得 80 ， 减去 的 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3505", "content": "已知 两个 因数 的 积 是 20.4 ， 其中 一个 因数 是 4 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11895", "content": "小 明 的 妈妈 上街 卖 白菜 ， 上午 卖 了 45.6 千克 ， 下午 卖 了 32.4 千克 ， 一共 卖 了 117 元 ， 平均 每千克 白菜 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14818", "content": "天水市 市政 修 一条 路 ， 原 计划 每天 修 0.35 千米 ， 但 实际 每天 比 原 计划 多 修 0.04 千米 ， 16 天 后 还 差 0.8 千米 没 修 ， 这 条 路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12000", "content": "大米 每千克 2.3 元 ， 爸爸 买 了 25 千克 大米 ， 付出 100 元 ， 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22621", "content": "奥林匹克 火炬 在 中国 某省 8 天 传递 了 816 千米 ， 平均 每天 传递 了 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8012", "content": "小 华 有 46 枚 邮票 ， 小 明 的 邮票 比 小 华 多 16 枚 ， 小强 的 邮票 等于 小 华 和 小 明 的 邮票 总数 的 3 倍 ． 小强 有 多少 枚 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13494", "content": "4 千克 的 西瓜 平均 分给 3 个人 吃 ， 每人 吃 到 了 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6002", "content": "小 兰 看 一本 320 页 的 儿童 百科全书 ， 已经 看 了 8 天 ， 每天 看 21 页 ， 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10530", "content": "三年级 有 4 个 班 ， 每个 班级 有 47 人 ， 其中 男同学 有 112 人 ． 女同学 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12377", "content": "1 升 煤油 重 (4/5) 千克 ， 一 升 汽油 重 (7/10) 千克 ， 一 升 汽油 比 一 升 煤油 轻 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5101", "content": "箱子 中 有 3 个 红球 ， 4 个 白 球 和 5 个 蓝球 ， 从中 摸 出 多少 球 ， 才能 保证 每种 颜色 的 球 至少 有 一个 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15607", "content": "铁道 工程兵 修建 一条 铁路 ， 已经 修好 了 90 千米 ， 比 剩下 的 2 倍 还 多 10 千米 ， 还 剩下 多少 千米 没 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19830", "content": "在 2012 年 的 伦敦 奥运会 上 ， 我国 选手 获得 了 金 、 银 、 铜 共 87 枚 奖牌 ， 其中 金牌 38 枚 ， 铜牌 22 枚 ， 获得 的 银牌 占 奖牌 总数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13721", "content": "一 个数 的 (2/3) 等于 30 的 (4/5) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3860", "content": "6 月 26 日 是 国际禁毒日 ， 首都 禁毒 会员 会 首次 举办 了 以 “ 提倡 健康 人生 ， 全民 参与 禁毒 ” 为 主题 的 万 人 长 走 活动 ． 由于 当 天下 起 了 大雨 ， 只有 12000 名 学生 参加 了 长 走 活动 ， 比 原 计划 参加 长 走 的 学生 少 (1/5) ． 原 计划 参加 长 走 的 学生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2561", "content": "修 一条 96 千米 长 的 公路 ， 第一周 修 了 全长 的 (1/5) ， 第 二 周 比 第一周 多 修 2.5 千米 ， 两周 共 修 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "20202", "content": "如果 相邻 两个 同学 相隔 2 米 排 成长 18 米 一排 的 队伍 做操 ， 那么 一共 有 多少 个 同学 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3687", "content": "学校 要 栽 一批 树苗 ， 这种 树苗 的 成活率 一般 为 80% ， 如果 要 栽 活 1200 棵 树苗 ， 那么 应 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4995", "content": "小 王 身高 172 厘米 ， 他 弟弟 的 身高 是 他 身高 的 (3/4) ， 则 他 弟弟 身高 = 多少 厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20788", "content": "某 汽车 制造厂 上半年 生产 小汽车 36400 辆 ， 比 原 计划 多 生产 3900 辆 ， 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7102", "content": "学校 一条 大路 的 一边 共 插 了 20 面 彩旗 ． 如果 每 两面 彩旗 之间 放 一 盆花 ， 一共 要 放 多少 盆花 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14544", "content": "食品盒 加工厂 原来 每天 生产 食品盒 500 个 ， 由于 购进 了 生产 设备 ， 现在 每天 可以 多 生产 食品盒 100 个 ． 照 这样 计算 生产 18000 个 食品盒 ， 可以 比 原来 提前 几天 完成 任务 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22178", "content": "一 千克 桔子 有 8 个 ， 一 千克 苹果 比 桔子 少 2 个 ， 妈妈 买 了 3 千克 桔子 和 4 千克 苹果 ， 两种 水果 共 多少 个 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "9887", "content": "一 个数 的 30% + 21 等于 它 本身 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8776", "content": "电脑公司 5 月份 计划 组装 2000 台 电脑 ， 实际 完成 2200 台 ， 这个 月 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9553", "content": "4 月份 ， 某校 开展 评选 “ 小 书虫 ” 趣味 阅读 活动 ． 明明 选择 了 一本 80 页 的 童话故事 书 ， 他 两天 看 了 51 页 ， 看过 的 页数 占 这 本书 总 页数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21328", "content": "小 红 看 一 本书 ， 已经 看 了 24 页 ， 占 全书 的 30% ， 还 剩 多少 页 没 看 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8219", "content": "200 / 50 与 4 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6738", "content": "小 东 有 50 朵花 ， 送给 小朋友 18 朵 ， 剩下 的 平均 分成 4 份 ， 每份 有 几朵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13969", "content": "小康村 修 防洪堤 ， 第一周 修 了 全长 的 30% ， 第 二 周 修 了 1500 米 ， 这 两周 修 的 总 米 数 占 全长 的 (4/5) ． 这 条 防洪堤 还有 多少 米 没 修 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18712", "content": "一 种 树苗 的 成活率 是 98% ， 为了 保证 成活 392 棵 ， 至少 应 种 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12102", "content": "一 根 电线杆 埋 在 地下 (5/2) 米 ， 露出 地面 的 长度 是 (23/3) 米 ， 这根 电线杆 一共 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22563", "content": "假期 同学 们 收集 作文 ， 我们 班 有 4 个 小组 ， 每个 小组 人数 相等 ． 每人 收集 了 15 篇 作文 ． 老师 统计 了 一下 ， 全班 一共 收集 了 720 篇 作文 ， 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11889", "content": "幼儿园 买来 红 气球 6 个 ， 买 的 黄 气球 比 红 气球 的 1.5 倍 少 8 个 ， 买来 黄 气球 的 数量 = 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3337", "content": "被减数 是 160 ， 减数 与 差 的 比 是 5 ： 3 ， 减数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1509", "content": "甲 、 乙 两 人 装配 自行车 ， 甲 每 小时 装 8 辆 ， 乙 每 小时 装 6 辆 ， 两 人 各 装配 240 辆 ． 乙 比 甲 要 多用 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11669", "content": "电视机厂 去年 生产 彩电 8400 台 ， 比 前年 增产 了 (1/5) ， 前年 生产 彩电 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21982", "content": "老师 准备 为 全班同学 买 彩色 铅笔 ， 买 24 盒 ， 每盒 5 支 ， 每支 彩色 铅笔 2 元 ， 一共 花 去 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21496", "content": "一 辆 汽车 向 山区 送货 ， 以 每 小时 45 千米 的 速度 在 山路 上行 了 4 小时 ， 又 以 时 每 小时 行 55 千米 的 速度 行 了 3 小时 ， 这辆 车 一共 行 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14011", "content": "有 一根 长方体 木料 体积 是 540 立方分米 ， 它 的 截面 面积 是 20 平方分米 ， 这根 木料 的 长 应 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8769", "content": "甲 数 是 60 ， 乙 数 比 甲 数 少 (1/5) ， 乙 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17977", "content": "建造 一幢 教学大楼 ， 计划 投资 150 万元 ， 实际 投资 120 万元 ， 实际 比 计划 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22851", "content": "学校 举行 运动会 ， 三年级 共 4 个 班 ， 每个 班 有 12 名 运动员 ， 观众 人数 是 运动员 人数 的 2 倍 ， 三年级 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "10941", "content": "4 / 1.8 的 商 ， 加上 3 ， 再 乘 2 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14725", "content": "小 明 读 一 本书 ， 第一次 读 了 总数 的 (3/8) ， 第 二 次 读 了 余下 的 (1/5) 还 多 8 页 ， 这 是 书 还 剩 52 页 ． 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18776", "content": "一 个数 的 (3/4) 是 12 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17661", "content": "0.3125 * 457.83 * 32 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1508", "content": "某校 有 学生 960 人 ， 其中 有 510 人 订阅 “ 作文 报 ” ， 有 330 人 订阅 “ 数学 报 ” ， 有 120 人 订阅 “ 科学 爱好者 ” ， 全校学生 中 有 270 人 订阅 两种 报刊 ， 有 58 人 3 种 报刊 都 订 ， 那么 这 学校 中 没有 订阅 任何 报刊 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "13597", "content": "小 红 从 甲地 到 乙地 办事 ， 行 了 全程 的 (3/7) ， 他 又 行 了 20 千米 ， 这时 他 行 的 路程 与 未 行 的 路程 的 比 是 5 ： 2 ． 小 红 行 了 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11721", "content": "甲 车 每 小时 行 40 千米 ， 乙 车 每 小时 行 60 千米 ， 甲 车 从 a 地 、 乙 车 从 b 地 同时 出发 相向 而 行 ， 两车 相遇 后 4 小时 ， 甲 车 到达 b 地 ， a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22530", "content": "从 甲 到 乙 ， 客车 每 小时 行 60 千米 ， 4.5 小时 到达 ， 货车 每 小时 行 54 千米 ， 需 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7140", "content": "为了 缓解 交通 拥挤 状况 ， 某市 正在 进行 道路 拓宽 ． 团结 路 的 路 宽 由 原来 的 12 m 增加 到 18 m ， 拓宽 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12961", "content": "五年级 开展 数学 竞赛 ， 一共 20 题 ， 答对 一 题 得 7 分 ， 答错 一 题 扣 4 分 ， 王 磊 得 74 分 ， 他 答对 了 多少 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18787", "content": "在 体育 用品商店 中 一个 足球 标价 是 95 元 / 个 ， 现在 打 0.8 出售 ， 它 的 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3542", "content": "某 商店 购进 一批 皮 凉鞋 ， 每 双 售出 价 比 购进 价 多 15% ． 如果 全部 卖出 ， 则 可 获利 120 元 ； 这 批 皮 凉鞋 的 购进 价 = 多少 元 ？ （ 提示 ： 每 双 可 获利 数 ， 与 总 获利 数 有 什么 关系 ？ ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7551", "content": "青菜 20 千克 ， 白菜 的 重量 是 青菜 的 3 倍 还 多 14 千克 ， 一共 有 多少 千克 菜 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17841", "content": "小胖 看 一本 故事书 ， 开始 每天 看 9 页 ， 10 天 正好 看 完 这 本书 的 一半 ， 以后 他 每天 看 15 正好 在 借 期内 看 完 ， 这 本书 借期 = 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3954", "content": "拖拉机厂 计划 制造 720 台 拖拉机 ， 已经 干 了 4.5 天 ， 平均 每天 制造 90 台 ， 剩下 的 要 在 3 天 内 完成 ， 平均 每天 制造 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14001", "content": "修路 队 修 一条 公路 ， 第一个 星期 修 了 全长 的 (1/12) ， 第 二 星期 修 了 全长 的 (1/9) ， 两个 星期 正好 修 2100 m ， 这 条 路 有 多长 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22719", "content": "小 亮 在 计算 小数 减法 时 ， 把 减数 3.8 看成 了 38 ， 结果 是 52.8 ， 正确 得数 应 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4094", "content": "四年级 一班 有 男生 23 人 ， 女生 25 人 ． 每 4 人 一组 去 参加 劳动 ， 一共 要 分 多少 组 ？ （ 用 综合 算式 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15845", "content": "一 盒 什锦糖 ， 其中 花生糖 的 质量 是 奶糖 的 (4/5) ， 水果糖 的 质量 是 奶糖 的 (3/4) ， 糖盒 内 有 奶糖 600 克 ， 水果糖 有 多少 克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "843", "content": "a 、 b 两地 相距 3300 米 ， 甲 、 乙 两 人 同时 从 两地 相对 而 行 ， 甲 每分钟 走 82 米 ， 乙 每分钟 走 83 米 ， 已经 行 了 15 分钟 ， 还要 行 多少 分钟 才 可以 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10945", "content": "四年级 一班 有 学生 54 人 ， 每人 购买 一台 价值 210 元 的 复读机 共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2476", "content": "一 辆 汽车 3 小时 行 了 135 千米 ， 一架 飞机 飞行 的 速度 是 汽车 的 28 倍 ， 这 架飞机 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12555", "content": "小 亮 用 电脑打字 ， 3 分钟 打 了 294 个 字 ． 照 这样 计算 ， 他 打 490 个 字 需要 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21311", "content": "打 一份 稿件 ， 如果 每分钟 打 90 个 字 ， 5 分钟 可 打 完 ， 如果 要 10 分钟 打 完 ， 每分钟 需要 打 多少 个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12524", "content": "一 件 上衣 现价 比 原价 降低 (2/9) ， 正好 降低 240 元 ． 这件 上衣 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8610", "content": "有 2 吨 煤 ， 第一次 运走 总数 的 (1/3) ， 第 二 次 运走 总数 的 (2/5) ， 还 剩下 这 堆 煤 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2167", "content": "一 种 呢大衣 每件 标价 600 元 ， 因 季节 转换 打 0.8 出售 ， 每件 获利 25% ， 店家 出售 这样 的 大衣 120 件 ， 可 获 利润 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "4361", "content": "在 40 米 长 的 人行道 一侧 栽树 ， 每隔 5 米 栽 一棵 ， 两头 都 栽 ， 一共 可以 栽 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9151", "content": "小 明 看 一本 故事书 ， 每天 看 40 页 ， 8 天 可以 看 完 ， 如果 要 4 天 看 完 ， 每天 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3292", "content": "公园 里 有 一个 圆形 的 水池 ， 李 大爷 每天 早晨 绕 着 水池 跑 20 圈 ， 如果 圆形 水池 的 直径 是 38 米 ， 李 大爷 每天 早晨 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14067", "content": "一 批 布 ， 按 每套 衣服 用布 2.6 米 裁剪 ， 可 做 120 套 ， 改进 裁剪 方法 后 ， 现在 每套 用布 只 需 2.4 米 ， 这样 可以 多 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15732", "content": "把 943 平均 分成 41 份 ， 每份 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21155", "content": "校门口 商店 的 老板 花 3000 元 批发 了 225 把 雨伞 ， 如果 每 把 雨伞 卖 15 元 ， 售完 这些 雨伞 ， 可以 赚 到 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15451", "content": "甲乙 两车 同时 从 a 、 b 两地 相对 开出 ， 甲 车 每 小时 行 25 千米 ， 乙 车 每 小时 行 38 千米 ， 5 小时 后 两车 相遇 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15076", "content": "一 个 平行四边形 的 面积 是 4.5 平方分米 ， 高 是 1.5 分 米 ， 底 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15838", "content": "在 地球 漫长 的 历史 上 ， 已经 有 90998 种 鸟类 消亡 ， 比 现在 鸟类 的 10 倍 还 多 768 种 ． 现存 鸟类 多少 种 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12840", "content": "一 套 家具 打 0.85 就 可以 少 花 753 元 ， 这 套 家具 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12501", "content": "六年级 有 264 名 学生 ， 每人 起码 订 了 一种 杂志 ， 其中 有 (5/8) 的 学生 订 了 《 科学 画报 》 ， 有 (2/3) 的 学生 订 了 《 小学生 天地 》 ， 这 两种 杂志 都 订 的 有 几名 学生 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13758", "content": "一 个数 乘 上 0.32 的 积 比 3 的 5 倍 少 12.44 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16608", "content": "希望 小学 图书室 有 故事书 300 本 ， 比 科普读物 多 (1/4) ， 科普读物 有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12700", "content": "水果店 运 来 450 箱 苹果 ， 每箱 15 千克 ， 卖出 225 箱 ， 还 剩 多少 千克 苹果 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "312", "content": "客车 和 货车 同时 从 相距 360 千米 的 两地 相对 开出 ， 客车 每 小时 行 80 千米 ， 经过 2.4 小时 两车 相遇 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2185", "content": "四年级 有 120 人 ， 是 全校 人数 的 (1/6) ， 三年级 人数 占 全校 人数 的 (2/9) ， 三年级 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11131", "content": "水果 店里 运 来 500 千克 水果 ， 上午 卖出 275 千克 ， 下午 卖出 138 千克 ， 还 剩 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12842", "content": "在 学校 的 前面 有 一条 公路 ， 在 一旁 每隔 2 米 植 一棵树 ， 从 起点 到 终点 一共 植 了 22 棵 树 ， 这 条 公路 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18109", "content": "一 学生 从 家 到 学校 ， 如果 以 每分钟 50 米 的 速度 行走 ， 就要 迟到 8 分钟 ； 如果 以 每分钟 60 米 的 速度 前进 ， 就 可以 提前 5 分钟 到校 ， 这个 学生 出发 时 离 上学 时间 有 多少 分钟 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6371", "content": "一 个 比 的 前项 是 (7/10) ， 比值 是 15 ， 这个 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19372", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 出发 相向 而 行 ， 经过 8 小时 相遇 ， 相遇 后 两车 继续 前行 ， 由于 甲 车 每 小时 多行 15 千米 ， 这样 又 经过 5 小时 ， 两车 同时 到达 各自 目的地 ， 求 a 、 b 两地 的 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "21800", "content": "小 晴 在 做 小数 减法 时 ， 把 减数 4.8 看成 了 48 ， 结果 得 2.2 ． 正确 的 得数 应该 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6310", "content": "甲乙 两地 相距 630 千米 ， 快车 行驶 完全 程 要 10 小时 ， 慢车 行驶 完全 程 要 15 小时 ， 两车 同时 从 两地 相对 开出 ， 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2955", "content": "海象 的 寿命 大约 是 40 年 ， 海狮 的 寿命 是 海象 的 (2/3) ， 海豹 的 寿命 是 海狮 的 (3/4) ． 海豹 的 寿命 大约 = 多少 年 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2734", "content": "服装厂 生产 的 童装 与 女装 的 比 为 2 ： 5 ， 童装 是 女装 的 多少 % ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13888", "content": "一 辆 压路机 ， 滚筒 半径 为 1 米 ， 长 2 米 ， 每分钟 转 10 下 ， 每分钟 转 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "3017", "content": "0.21 / (3/5) 的 商 加上 2.4 * (1/4) 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12539", "content": "在 一张 长 为 10 分 米 、 宽 为 8 分 米 的 长方形 铁皮 4 个 角 上 剪 去 边长 为 2 分 米 的 正方形 后 ， 把 它 折 成 一个 长方体 容器 ， 这个 容器 的 容积 = 多少 立方分米 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "5798", "content": "一 个 文具厂 计划 生产 7000 个 笔盒 ， 已经 生产 了 3 天 ， 每天 生产 1500 个 ， 余下 的 要 2 天 完成 ． 平均 每天 要 生产 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18107", "content": "多少 扩大 6 倍 是 0.24 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4966", "content": "4 辆 大 货车 比 5 辆 小 货车 多 运货 2.2 吨 ， 已知 每辆 小 货车 运货 4.8 吨 ， 每辆 大 货车 运货 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7081", "content": "李老师 4 分钟 可以 打 416 个 字 ， 他 平均 每分钟 打 多少 个 字 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13050", "content": "学校 买来 5 个 篮球 和 12 个 足球 ， 共 付 了 362.50 元 ． 已知 每个 足球 的 售价 是 22.5 元 ， 每个 篮球 的 售价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5951", "content": "甲 、 乙 两列 火车 从 相距 798 千米 的 两地 同时 相对 开出 ， 经过 4.2 小时 两车 相遇 ， 已知 甲 车 每 小时 行驶 96 千米 ， 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5720", "content": "一 个数 与 3 的 和 是 7 的 倍数 ， 与 5 的 差 是 8 的 倍数 ， 这个 数 最小 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2885", "content": "张 叔叔 家种 了 月季花 96 棵 ， 种 的 菊花 棵 数 是 月季花 的 (5/12) ， 种 兰花 的 棵 数 又 是 菊花 的 (3/8) ， 他家 种 了 多少 棵 兰花 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1579", "content": "小 红 从 家 到 学校 845 米 的 路程 共 走 了 13 分钟 ， 从小红 家 到 新华书店 有 390 米 ， 她 用 同样 的 速度 要 走 几分钟 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15475", "content": "李老师 买 了 3 千克 白菜 和 6 千克 青菜 ， 一 共用 了 7.62 元 ， 已知 每千克 青菜 0.36 元 ， 每千克 白菜 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9540", "content": "一 个 汽车 制造厂 4 天 生产 汽车 288 辆 ， 照 这样 的 工作效率 ， 再生产 12 天 ， 这个 汽车 制造厂 一共 生产 汽车 多少 辆 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1244", "content": "一 本 《 格林童话 》 25 元 ， 小 明 买 了 24 本 ， 小 红 买 了 16 本 ， 他们 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12420", "content": "一 批 布料 长 215 米 ， 栽 40 套 西服 ， 每套 3.5 米 ， 剩下 的 布料 栽 30 套 童装 ， 平均 每 套装 用 布料 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3530", "content": "学校 购买 惠普 牌 激光打印机 ． 在 商店 购买 5 台 ， 付款 4050 元 ； 在 网上 付款 6000 元 购买 了 12 台 同样 的 打印机 ． 在 网上 购买 一台 打印机 比 在 商店 购买 要 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17558", "content": "一 台 电视 打 0.75 后 的 售价 是 1800 元 ， 原价 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8021", "content": "某 学校 有 学生 720 人 ， 女生 占 (5/9) ． 有 女生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15973", "content": "粮站 运 来 大米 4200 千克 ， 卖出 了 (5/6) ， 卖出 多少 千克 大米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4131", "content": "计算 9999 * 4444 / 6666 / 2222 的 结果 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16160", "content": "张 叔叔 家种 了 月季花 96 棵 ， 种 的 菊花 棵 数 是 月季花 的 (3/4) ， 种 兰花 的 棵 数 又 是 菊花 的 (1/3) ， 他家 种 了 多少 棵 兰花 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14041", "content": "学校 新 开辟 了 一块 劳动 实践 基地 ， 如果 每班 20 平方米 ， 12 个 班 参加 ； 又 有 3 个 班 要求 参加 ， 那么 平均 每班 分 得 多少 平方米 的 实验 地 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21367", "content": "读 一本 科技 书 ， 3 天 可 读 它 的 (3/20) ， 读完 这 本书 共 需 多少 天 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13495", "content": "“ 5 • 12 ” 大 地震 使 陕西省 共 倒塌 和 损坏 房屋 约 30 万 间 ， 比 甘肃省 少 (1/4) ， 甘肃省 倒塌 和 损坏 房屋 约 多少 万 间 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7569", "content": "红光 灯泡厂 今年 上半年 生产 节能 灯泡 24 万 只 ， 是 去年 全年 产量 的 (3/4) ， 去年 全年 产量 = 多少 万 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13647", "content": "王 老伯 家 一块 平行四边形 菜地 ， 底边 长 8 米 ， 高 6 米 ， 已知 平均 每平方米 可 收 青菜 15 千克 ， 这块 菜地 可以 收 青菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16260", "content": "菜 场上 黄瓜 每千克 售价 4.5 元 ， 比 每千克 青菜 贵 1.25 元 ， 买 一 千克 黄瓜 与 一 千克 青菜 共 需 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9919", "content": "电视机厂 原 计划 生产 电视机 6000 台 ， 30 天 完成 ． 实际 每天 比 原 计划 多 生产 50 台 ， 实际 每天 生产 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7301", "content": "商场 运 来 一批 糖果 ， 卖出去 了 250 千克 剩下 的 是 卖出去 的 3 倍 ． 商场 运 来 多少 糖 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15994", "content": "幸福 小学 暑假 毕业 学生 86 人 ， 开学 招进 新生 148 人 ， 同时 又 转入 学生 7 人 ， 转 出 3 人 ， 这时 全校 共有 学生 654 人 ， 问 暑假 前 幸福 小学 有 多少 学生 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "22768", "content": "把 一根 45 米 长 的 铁丝 剪成 相等 的 小 段 ， 每 段长 (3/5) 米 ， 可以 剪 多少 段 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21371", "content": "(1/2) + (2/3) + (5/6) = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21046", "content": "建筑工地 运 来 20 车 水泥 ， 每 车 45 袋 ， 每 袋 水泥 重 50 千克 ． 一共 运 来 水泥 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16910", "content": "一 堆 苹果 不到 1500 个 ， 3 个人 分 、 5 个人 分 、 7 个人 分 、 13 个人 分 都 正好 分 完 且 无 剩余 ， 这 堆 苹果 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "19525", "content": "2009 年 12 月 1 日 ， 张 叔叔 把 20000 元 的 稿费 存入 银行 ， 存期 为 3 年 ， 年利率 为 3.33% ． 到期 后 张 叔叔 可 得 本金 和 利息 一共 多少 元 ？ （ 从 2008 年 10 月 9 日 起 国家 暂停 收取 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11145", "content": "甲 数 的 (2/3) 与 乙 数 的 和 是 60 ， 甲 数 的 (3/16) 正好 等于 乙 数 ． 甲 、 乙 两 数 的 和 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21344", "content": "一 个 长方体 ， 长 、 宽 、 高 分别 是 9 厘米 、 7 厘米 和 6 厘米 ， 从中 截去 一个 最大 的 正方体 ， 正方体 的 体积 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1315", "content": "两个 因数 的 积 是 1 ， 其中 一个 因数 是 1.7 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22562", "content": "小 明 看 一本 320 页 的 书 ， 第一天 读 了 整本书 的 (1/4) ， 第 二 天 读 了 整本书 的 (1/5) ， 第 3 天 应该 从 第 多少 页 开始 读 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22657", "content": "修路 队 要 修 一段 1423 米 的 公路 ， 已经 修 了 559 米 ， 剩下 的 要 用 24 天 修 完 ． 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11964", "content": "一 列 火车 从 威海 开往 济南 ， 已经 行 了 全程 的 (2/5) ， 离 济南 还有 360 千米 ． 威海 距离 济南 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19913", "content": "一 辆 货车 第一次 运 (23/16) 吨 的 西瓜 ， 第 二 次 比 第一次 少运 (1/4) 吨 ． 两次 共运 西瓜 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14068", "content": "多少 是 6 的 2 倍 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6602", "content": "鸵鸟 的 速度 是 72 千米 / 时 ， 非洲 野狗 的 速度 是 56 千米 / 时 ， 鸵鸟 7 小时 跑 的 路程 ， 非洲 野狗 需要 几小时 才能 跑 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21965", "content": "一 道 除法 算式 里 ， 除数 是 6 ， 商 是 18 ， 余数 是 3 ． 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22214", "content": "工地 上 原有 5 立方米 的 砖 ， 用 了 一些 后 ， 现在 还 剩 2 立方米 ， 用 掉 总数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7109", "content": "我国 是 一个 贫 水 的 国家 ， 人均 淡水 资源量 仅 为 世界 人均 淡水 资源量 的 (1/4) ． 世界 人均 淡水 资源量 是 9200 m ^ 3 ． 我国 人均 淡水 资源量 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23113", "content": "小 明 看 一 本书 ， 已经 看好 480 页 ， 比 剩下 的 多 60% ． 这 本书 共 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6642", "content": "把 一个 西瓜 放入 一个 长 4.5 分 米 ， 宽 3.8 分 米 ， 高 3.5 分 米 的 长方体 水池 中 ， 水面 没 过 西瓜 后 ， 水面 上升 了 0.4 分 米 ， 这个 西瓜 的 体积 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22525", "content": "六年级 同学 为 灾区 捐款 500 元 ， 五年级 同学 捐 的 是 六年级 的 (4/5) ， 四年级 同学 捐 的 是 五年级 的 (9/8) ． 四年级 同学 捐款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17660", "content": "一 列 火车 有 8 节车厢 ， 每 节车厢 有 118 个 座位 ， 这 列 火车 一共 有 多少 个 座位 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8741", "content": "小 东家 到 学校 有 490 米 ， 他 每天 上学 大约 走 8 分钟 ， 他 每分钟 大约 走 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20415", "content": "学校 开展 植树 活动 ， 一共 植 了 526 棵 ， 其中 5 、 六年级 植 了 378 棵 ， 其他 年级 植树 多少 棵 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20751", "content": "新民 小学 去年 毕业 的 学生 有 160 人 ， 今年 毕业 的 学生 比 去年 毕业 的 增加 25% ， 今年 毕业 的 学生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12852", "content": "小 华 看 一本 故事书 ， 已 看 的 页数 与 未 看 的 页数 之 比 是 3 ： 5 ， 他 已 看 了 45 页 ， 这本 故事书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "225", "content": "360 + 300 的 和 除以 这 两个 数 的 差 ， 结果 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20507", "content": "同学 们 为 班级 图书 角 捐书 ， 故事书 有 126 本 ， 文艺 书 是 故事书 的 (5/6) ， 科技 书 是 文艺 书 的 (1/3) ， 捐 的 科技 书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11432", "content": "有 一堆 化肥 已 运走 25% ， 正好 运走 75 吨 ， 这 堆 化肥 还 剩下 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13181", "content": "师徒 二 人 赶 做 一批 零件 ， 师傅 每 小时 做 15 个 ， 徒弟 每 小时 做 12 个 ， 两 人 合作 5 小时 全部 完工 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6915", "content": "一 本书 960 页 ， 小 明 原 计划 20 天 看 完 ， 实际 每天 比 原 计划 多 看 12 页 ， 实际 几天 看 完 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "421", "content": "计算 ： 9998 + 998 + 99 + 9 + 6 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "13606", "content": "果园 里 有 梨树 120 棵 ， 苹果树 的 棵 数 是 梨树 的 (3/4) ， 苹果树 的 棵 数 又 是 桃树 的 (2/3) ， 果园 里 有 桃树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15399", "content": "用 分数 表示 13 / 27 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17099", "content": "李 明 买 了 一辆 30 万元 的 汽车 ， 按规定 要 缴纳 10% 的 新车 购置税 ． 他 买 这辆 汽车 一共 要 付 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13749", "content": "一 支 修路 队 要 修 441 米 的 路 ， 如果 每天 修 63 米 ， 需要 几天 修 完 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6587", "content": "5 年 一班 有 故事书 150 本 ， 科技 书 比 故事书 少 (1/3) ， 科技 书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15618", "content": "50 页 纸 大约 厚 0.4 厘米 ， 一本 2 厘米 厚 的 书 大约 有 多少 页 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14727", "content": "甲乙 两城 相距 263.2 千米 ， 一辆 客车 行 了 3 小时 ， 每 小时 行 76.5 千米 ． 这辆 客车 已经 行 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13344", "content": "甲乙 两个 城市 相距 630 千米 ， 一列 客车 和 一列 货车 同时 从 两个 城市 相对 开出 ， 客车 平均 每 小时 行 60 千米 ， 货车 平均 每 小时 行 45 千米 ， 两车 开出 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7307", "content": "小 红 每分钟 走 65 米 ， 从 家 到 学校 走 了 12 分钟 ， 小 红 家 到 学校 大约 有 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18480", "content": "学校 发 作业本 ， 有 25 个 班 ， 每班 发 144 ， 还要 留 80 本 作为 备用品 ， 学校 应该 买 多少 本 作业本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3931", "content": "甲乙 两地 相距 355 千米 ， 一辆 客车 和 一辆 货车 分别 从 甲 城 和 乙 城 相对 开出 ， 2.5 小时 相遇 ． 已知 货车 每 小时 形式 69.4 千米 ， 客车 每 小时 形式 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7214", "content": "一 个 标准 油桶 ， 桶 连 油 共 重 7 千克 ． 司机 马 叔叔 已经 用 去 一半 油 ， 现在 连 桶 还 重 4 千克 ． 桶 里 还有 多少 油 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20887", "content": "长江流域 面积 约 占 我国 陆地 总面积 的 (1/5) ， 黄河流域 面积 约 占 我国 陆地 总面积 的 (2/25) ， 两条 流域 一共 占 我国 陆地 总面积 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21391", "content": "小 芳 看 一本 188 页 的 故事书 ， 前 4 天 看 了 68 页 ． 剩下 的 6 天 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8340", "content": "王老师 带 了 100 元 钱 去 买 学习 用具 ， 他 买 了 8 支 钢笔 ． 找回 4 元 ， 每支 钢笔 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8506", "content": "一 辆 汽车 0.5 小时 行驶 15.2 千米 ， 照 这样 计算 ， 行驶 228 千米 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17976", "content": "修 一条 水渠 ， 计划 每天 修 60 米 ， 12 天 可以 修 完 ， 实际 每天 比 原 计划 多 修 20 米 ， 只 需要 几天 修 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4377", "content": "梨 是 苹果 筐 数 的 (3/4) ， 苹果 又 是 香蕉 筐 数 的 (5/6) ． 梨 是 120 筐 ， 香蕉 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19901", "content": "食堂 运 来 大米 8 吨 ， 运 来 的 面粉 是 大米 的 (1/4) ， 运 来 的 面粉 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4652", "content": "某 车间 计划 生产 零件 5200 个 ， 前 12 天 共 生产 零件 1800 个 ， 从 第 13 天 起 ， 每天 能 生产 零件 200 个 ， 这个 车间 完成 这 批 零件 的 任务 共 需要 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14741", "content": "某校 进行 野外 军训 ， 甲 、 乙 两队 同时 从 学校 出发 ． 两队 白天 的 行走 速度 是 不同 的 ， 甲队 每个 白天 行 20 千米 ， 乙 队 行 15 千米 ， 夜里 两队 的 行走 速度 是 相同 的 ， 结果 甲队 恰好 用 5 个 昼夜 达 目的地 ， 乙 队 恰好 用 6 个 昼夜 到达 目的地 ． 那么 ， 从 学校 到 目的地 共有 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "18017", "content": "少年宫 乐队 有 女同学 35 人 ， 男同学 27 人 ， 合唱队 的 人数 是 乐队 的 4 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14482", "content": "饲养 组 有 黑 兔 60 只 ， 白兔 比 黑 兔 多 (1/5) ， 白兔 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7603", "content": "农 博园 的 果树园 中 有 桃树 360 棵 ， 比 梨树 的 3 倍 少 30 棵 ． 有 梨树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8727", "content": "修路 队 要 修 一条 长 500 米 的 铁路 ， 已经 修 了 80% ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19573", "content": "妈妈 买来 茄子 和 西红柿 各 1.8 千克 ． 每千克 茄子 2.2 元 ， 每千克 西红柿 3.8 元 ． 两种 菜 一共 花 了 多少 钱 ？ 5 分 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5645", "content": "口袋 里 放入 9 个 球 ， 任意 摸 一个 球 ， 要 使 摸 到 红球 的 可能性 为 (2/3) ， 要 放入 多少 个 红球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19786", "content": "东方 机床厂 ， 前 11 天 共 生产 机床 346 台 ， 后 14 天 平均 每天 产 36 台 ， 这个 机床厂 平均 每天 产 机床 多少 台 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16251", "content": "在 一个 盒子 里 装 着 只有 颜色 不同 的 若干 黑 、 白 、 红 3 种颜色 的 珠子 ， 其中 红色 珠子 的 颗 数 是 白色 的 (1/7) ， 黑色 珠子 的 颗 数 是 红色 珠子 的 50% ． 如果 从 盒子 中 任意 摸 出 一颗 珠子 ， 摸 出 黑色 珠子 的 可能性 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7204", "content": "一 件 风衣 现在 售价 为 210 元 ， 比 原来 售价 降低 了 30% ， 这件 风衣 原来 售价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2353", "content": "甲 、 乙 两车 分别 同时 从 a 、 b 两城 相对 开出 ， 甲 车 从 a 城 开往 b 城 ， 每 小时 行 全程 的 10% ， 乙 车 从 b 城 开往 a 城 ， 每 小时 行 80 千米 ， 当 甲 车 距 a 城 260 千米 时 ， 乙 车 距 b 城 320 千米 ， a 、 b 两城 之间 的 路程 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15246", "content": "某 单位 第一次 向 灾区 捐款 24 万元 ， 第 二 次 比 第一次 的 3 倍 还 多 5 万元 ， 该 单位 两次 共 捐款 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1156", "content": "学校 有 足球 120 个 ， 比 排球 的 (4/5) 多 12 个 ， 排球 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6048", "content": "方庄 小学 举行 队列 体操 表演 ， 一共 512 人 ， 平均 排成 8 个 方队 ， 每个 方队 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6998", "content": "希望 小学 三年级 有 学生 216 人 ， 四年级 的 人数 比 三年级 多 (2/9) ， 四年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14647", "content": "两城 相距 550 千米 ， 一列 客车 和 一列 货车 同时 从 两个 城市 相对 开出 ， 客车 每 小时 行 55 千米 ， 货车 的 速度 是 客车 的 (9/11) ， 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5181", "content": "一 个数 的 后 项 是 3.5 ， 比值 是 2 ， 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3829", "content": "某 装修 公司 每月 按 营业额 的 3% 上交 营业税 ， 平均 每月 上交 营业税 12900 元 ． 该 装修 公司 每年 的 营业额 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20044", "content": "电影票 10 元 一张 ， 降 阶 后 观众 增加 了 50% ， 收入 增加 了 (1/5) ． 则 一张 门票 降价 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8280", "content": "公园 里 有 一条 长 120 米 的 石子路 ， 计划 在 路 的 一边 每隔 6 米 栽 一棵树 （ 两端 都 要 栽 ） ， 共 需 多少 棵 树 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12751", "content": "把 32 千克 糖 平均 装 在 8 个 袋子 里 ， 每个 袋子 应 装 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3519", "content": "李 庄 今年 油菜 的 种植 面积 是 28 公顷 ， 比 去年 增加 (1/6) ． 去年 油菜 的 种植 面积 = 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11968", "content": "一 个 平行四边形 的 花坛 ， 它 的 面积 是 50 m ^ 2 ， 底 是 5 m ， 高 = 多少 m ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7885", "content": "一 辆 小车 从 罗源 出发 开往 禾 风景区 用 了 4 小时 ， 时速 是 30 千米 / 时 ， 回来 时 用 了 3 小时 ， 回来 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17836", "content": "某校 美术组 有 40 人 ， 美术组 人数 是 音乐 组 人数 的 (2/3) ， 数学组 人数 又 是 音乐 组 人数 的 (3/4) ． 数学组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12451", "content": "一 个数 除以 6 ， 商 是 40 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2664", "content": "一 种 商品 进行 处理 销售 ， 降价 10% 后 售价 是 990 元 ， 该 商品 降价 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19961", "content": "电影院 共有 28 排座位 ， 第一排 有 20 个 座位 ， 以后 每排 都 比 前排 多 2 个 座位 ， 最后 一排 有 多少 个 座位 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22098", "content": "一 个 因数 是 205 ， 另 一个 因数 是 36 ， 它们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22635", "content": "学校 4 、 五年级 学生 为 希望 小学 共 捐 了 913 本书 ， 五年级 学生 捐 的 本 数 是 四年级 的 1.2 倍 ， 四年级 学生 捐 了 多少 本书 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7338", "content": "水果店 运 来 一批 水果 ， 其中 苹果 重 132 千克 ， 梨 的 重量 是 苹果 的 (5/11) ． 运 来 梨 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18997", "content": "大成 小学 买 了 5 个 篮球 和 12 足球 ， 每个 足球 的 价格 是 15.3 元 ， 每个 篮球 的 价格 是 27.8 元 ． 一共 要 付 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20827", "content": "赵老师 把 3000 元 存入 银行 ， 定期 2 年 ， 年利率 是 4.5% ， 到期 时 可 得 本金 和 税后 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7191", "content": "学校 组织 去 看 电影 ， 光明 小学 全体师生 共 720 人 观看 ， 团体票 每张 9 元 ， 学校 需要 带 多少 钱 去 买票 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19895", "content": "某 小区 开展 了 “ 我 为 家园 添 绿色 ” 的 主题 活动 ， 去年 植树 苗 360 棵 ， 今年 比 去年 多 植 (1/4) ， 这个 小区 今年 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20856", "content": "多少 的 (7/8) 是 (1/2) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17130", "content": "李老师 为 某 杂志 审稿 ， 审 稿费 250 元 ． 为此 她 需要 按 3% 的 税率 缴纳 个人所得税 ， 她 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8161", "content": "把 一块 石头 ， 浸没 在 一个 底 面积 是 60 平方厘米 的 圆柱形 容器 里 ， 容器 的 水面 上升 了 1.5 厘米 ， 这块 石头 的 体积 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9915", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 (2/5) ， 离 乙地 还有 135 千米 ． 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9838", "content": "一 个 底 长 3.2 分 米 的 平行四边形 和 一个 边长 是 2.4 分 米 的 正方形 面积 相等 ， 求 这个 平行四边形 的 高 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18654", "content": "学校 班车 4 分钟 行驶 了 2400 米 ， 照 这样 的 速度 ， 从 第 1 站 到 学校 共 行驶 了 30 分钟 ， 这 段 路程 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14280", "content": "钢琴 的 黑 键 有 36 个 ， 比 白 键 少 16 个 ， 白 键 有 多少 个 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17681", "content": "图书室 新 到 图书 800 本 ， 科技 书 占 (3/16) ， 故事书 占 (3/5) ， 其它 类书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21522", "content": "丰收 农具厂 制造 一批 镰刀 ． 原 计划 每天 制造 360 把 ， 18 天 完成 ． 实际 每天 多 制造 72 把 ， 照 这样 计算 ， 多少 天 就 能 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17132", "content": "红光 大队 用 拖拉机 耕地 ， 2 台 3 小时 耕 75 公亩 ， 照 这样 算 ， 4 台 5 小时 耕 多少 公亩 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12021", "content": "甲乙 两地 相距 840 km ． 一辆 汽车 早上 6 ： 00 从 甲地 出发 开往 乙地 ， 3 时 行 了 180 km ． 照 这样 的 速度 ， 汽车 什么 时间 能 到达 乙地 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9267", "content": "多少 的 (3/4) 是 75 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14709", "content": "张师傅 和 李师傅 合作 生产 一批 同样 的 零件 ， 张师傅 每 小时 生产 18 个 ， 李师傅 每 小时 生产 12 个 ， 当 完成 任务 时 张师傅 生产 了 108 个 零件 ， 这 批 零件 共有 多少 个 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10154", "content": "400 的 60% 比 它 的 45% 多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7292", "content": "王 叔叔 带 了 800 元 钱 去 买 化肥 ， 买 了 18 袋 ， 剩下 8 元 ， 每 袋 化肥 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8516", "content": "一 项 工程 ， 由 甲 、 乙 两队 合 做 6 天 后 ， 还 剩下 这项 工程 的 (4/7) ． 两队 合 做 剩下 的 工程 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19594", "content": "一 个 长方形 池塘 ， 面积 是 220 平方米 ， 长 不变 ， 宽 扩大 3 倍 ． 这时 面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "206", "content": "1300 / 600 的 商 是 2 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "92", "content": "(10/3) 与 (1/3) 的 和 比 (5/6) 与 (4/5) 的 和 多 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16072", "content": "张 叔叔 从 某 城市 乘火车 去 上海 用 了 14 小时 ， 火车 每 小时 行 175 千米 ． 该 城市 到 上海 有 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12809", "content": "学校 天天 书屋 有 科普读物 640 本 ， 比 故事书 的 本 数多 60% ． 天天 书屋 有 故事书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18092", "content": "食堂 的 王师傅 把 4 升 油 平均 装 在 8 个 油壶 里 ， 平均 每个 油壶 装 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "296", "content": "三年级 252 人 要 乘 6 辆车 去 参观 科技馆 ． 如果 每辆车 的 人数 相同 ， 每辆车 应 坐 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15276", "content": "青年 旅行社 在 元旦 期间 推出 优惠活动 ， 原价 2800 元 的 “ 黄山 游 ” 现在 打 0.85 ， 比 原价 便宜 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12290", "content": "比 18 千克 少 (1/3) = 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "788", "content": "重阳节 快 到 了 ， 小 英 想 和 同学 们 一起 做 几个 中国 结 送给 福利院 的 爷爷奶奶 ． 做 一个 要 用 (3/4) 米 彩 绳 ， 小 英 想 做 6 个 ， 至少 要 准备 多少 米 彩 绳 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "41", "content": "某 商店 运 来 18 箱 苹果 和 22 箱 梨 ， 每箱 都 是 50 千克 ， 运 来 的 苹果 和 梨 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7952", "content": "在 植树节 那天 ， 一班 41 人 ， 共 种树 530 棵 ， 二 班 43 人 ， 共 种树 562 棵 ， 两个 班 平均 每人 种树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "374", "content": "小强 有 56 张 邮票 ， 小 芳 的 邮票 数 是 小强 的 2 倍 ， 他们 一共 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23134", "content": "六年级 有 学生 111 人 ， 相当于 五年级 学生 人数 的 (3/4) ， 五年级 和 六年级 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7443", "content": "小 明 买来 红 气球 35 个 ， 蓝 气球 的 个数 是 红 气球 的 3 倍 ． 小 明 一共 买来 多少 个 气球 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14566", "content": "某 家 商场 以 800 元 一台 的 价格 购进 一批 洗衣机 ， 以 965 元 一台 的 零售价 出售 ． 当 卖出 这 批 洗衣机 的 75% 时 ， 商场 已 获 利润 9900 元 ． 问 商场 购进 的 这 批 洗衣机 一共 有 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12642", "content": "2008 年 伦敦 奥运会 中国 共 获得 奖牌 总数 是 100 枚 ， 其中 金牌 51 枚 ， 银牌 21 枚 ， 铜牌 = 多少 枚 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12007", "content": "黄豆 的 营养 很 丰富 ， 其中 蛋白质 含量 约 占 36% ， 脂肪 含量 约 占 18.4% ． 750 克 黄豆 中 ， 蛋白质 和 脂肪 共 含 多少 克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1382", "content": "在 一个 口袋 里 有 2 个 红球 和 8 个 黄 球 ， 从中 任意 摸 出 1 个 球 ， 摸 出 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4281", "content": "3 （ 1 ） 班 有 52 人 ， 班长 组织 为 地震 灾区 四川 雅安 捐款 ， 平均 每人 捐 了 18 元 ， 这个 班 共 捐款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7976", "content": "胜利 工程队 修 一条 水渠 ， 第一周 修 了 150 米 ， 正好 修 了 30% ． 还 剩下 多少 米 没有 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2113", "content": "学校食堂 运 来 3 吨 大米 ， 10 天正 好吃 完 ， 平均 每天 吃 多少 吨 大米 ？ （ 用 分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2727", "content": "将 一根 3.5 米 长 的 竹竿 插入 游泳池 池底 ， 露出 水面 的 部分 长 1.9 米 ， 这儿 的 水深 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13592", "content": "小 东 的 身高 116 厘米 ， 爸爸 的 身高 176 厘米 ， 小 东 再 长 多少 厘米 才 和 爸爸 一样 高 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16651", "content": "爷爷 今年 75 岁 ， 正好 是 我 和 哥哥 的 年龄 的 3 倍 ， 我 今年 9 岁 ， 哥哥 今年 多少岁 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1183", "content": "一 件 商品 ， 提价 20% 后 又 降价 30% ， 这件 商品 的 现价 是 原价 的 多少 （ 用 百分数 表示 ） ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7340", "content": "一 个 平行四边形 与 一个 三角形 的 底 和 高 都 是 4 cm ， 平行四边形 面积 比 三角形 面积 多 多少 cm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1525", "content": "0.0625 + 0.125 + 0.1875 + 0.25 + 0.3125 + 0.375 + 0.4375 + 0.5 + 0.5625 + 0.625 + 0.1250 + 0.1251 + 0.1252 + 0.1253 + [ [ 0.1254 ] ] = ．", "knowledge": ["+"], "difficulty": 1.3, "length": 29}
-{"question_id": "11171", "content": "一 件 衣服 现价 80 元 ， 比 原价 便宜 了 (1/5) ， 这件 衣服 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10681", "content": "白 兔子 有 27 只 ， 灰 兔子 的 只 数 是 白 兔子 的 4 倍 ， 白 兔子 比 灰 兔子 少 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4968", "content": "水果店 运 来 1500 千克 苹果 ， 运 来 的 梨 是 苹果 的 (3/5) ， 梨 又 是 桃 的 (3/4) ， 桃 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "235", "content": "一 艘 轮船 从 甲 城 开往 乙 城 ， 以 每 小时 85 千米 的 速度 行驶 4 小时 到达 ． 从 乙 城 返航 时 由于 逆风 ， 轮船 每 小时 的 速度慢 了 17 千米 ， 轮船 几小时 才能 到达 甲 城 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20416", "content": "一 件 衬衫 售价 比 原价 降低 (2/5) 后 是 60 元 ， 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2078", "content": "大树 村 今年 油菜籽 的 总产量 是 98.9 吨 ， 比 去年 增产 12.9 吨 ， 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1962", "content": "天河 村 去年 开展 植树造林 活动 ， 上半年 完成 造林 计划 的 (3/5) ， 下半年 完成 造林 计划 的 75% ， 结果 多 造林 630 棵 ， 这个 村 去年 实际 造林 多少 棵 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2154", "content": "叔叔 比 小 华大 20 岁 ， 明年 叔叔 的 年龄 是 小 华 的 3 倍 ， 小 华 今年 多少岁 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2144", "content": "买 一枝 圆珠笔 和 一枝 钢笔 共 需要 25 元 ， 买 一枝 圆珠笔 需要 2.65 元 ， 一枝 钢笔 比 一枝 圆珠笔 贵 多少 元 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9554", "content": "全世界 拥有 8600 多种 鸟 ， 我国 的 鸟类 约 占 全世界 的 15% ， 我国 约 有 多少 种鸟 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5074", "content": "跳绳 比赛 规定 每人 跳 3 分钟 ， 刘 平 跳 了 339 下 ， 张 英 平均 每分钟 比 刘 平 多 跳 12 下 ， 张 英 一共 跳 多少 下 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5612", "content": "一 块 平行四边形 的 花圃 ， 它 的 底 是 30 m ， 高 25 m ． 如果 每平方米 草坪 需要 36 元 ， 那么 铺满 整块 草坪 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10167", "content": "四年级 学生 开展 跳舞 和 唱歌 比赛 ， 参加 比赛 的 人数 占 全年 级 的 80% ， 其中 参加 跳舞 的 占 比赛 人数 的 30% ， 唱歌 的 占 参赛 人数 的 (4/5) ， 两种 比赛 都 参加 的 有 24 人 ． 四年级 共有 学生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6114", "content": "把 一根 绳子 按 5 ： 3 截 成 两段 ， 长 的 一段 比 短 的 长 2.5 米 ， 这根 绳子 原来 长 = 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1178", "content": "1 吨 的 (4/5) 和 多少 吨 的 (1/5) 同样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18809", "content": "小 方 说 ： “ 我 集 了 8 张 风景 邮票 ． ” 小 华 说 ： “ 我 集 的 邮票 比 你 的 3 倍 还 多 2 张 ． ” 小 华 集 了 多少 张 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18656", "content": "林场 今年 植树 2400 棵 ， 比 去年 多 植 (1/5) ， 去年 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "464", "content": "1 - (1/3) - (2/5) = ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2403", "content": "学校 图书室 里 有 连环画 册 180 本 ， 科技 书 的 本 数 是 连环画 册 的 (3/4) ， 是 故事 书本 数 的 (1/3) ． 求 故事书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20412", "content": "电冰箱 厂 原 计划 20 天 完成 2000 台 的 生产 任务 ， 实际 每天 的 产量比 原 计划 多 18 台 ． 求 实际 每天 生产 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8170", "content": "999 / 8 * 10 / 3 * 100 / 125 = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8036", "content": "果园 里 有 桃树 200 棵 ， 比 梨树 的 (1/5) 少 50 棵 ， 果园 里 有 梨树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7272", "content": "甲 的 月 收入 是 乙 的 12 倍 ， 已知 甲 的 收入 比 乙 多 16500 元 ， 那么 乙 的 月 收入 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18078", "content": "商店 运 来 红 毛衣 25 包 ， 蓝 毛衣 15 包 ， 蓝 毛衣 的 包 数 是 红 毛衣 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13712", "content": "徒弟 每 小时 加工 48 个 零件 ， 他 5 小时 加工 好 的 零件 个数 ， 师傅 只 需要 4 小时 就 能 完成 ， 师傅 每 小时 加工 零件 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9391", "content": "大米 有 80 千克 ， 面粉 比 大米 少 (3/4) ， 面粉 有 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11662", "content": "学校 某 天 到校 384 人 ， 出勤率 为 96% ， 这个 学校 共 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17869", "content": "相邻 两根 电线杆 之间 的 距离 是 45 米 ， 从 少年宫 起到 育英 小学 门口 有 36 根 电线杆 ， 再 往前 585 米 是 书店 ， 求 从 少年宫 到 书店 一共 有 多少 根 电线杆 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1879", "content": "王 叔叔 一次 劳务 报酬 所得 2000 元 ， 按规定 减去 800 元 后 的 部分 按 20% 的 税率 缴纳 个人所得税 ． 他 应 纳税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17709", "content": "小 云 看 一本 故事书 ， 上午 看 了 全书 的 25% ， 正好 是 50 页 ， 下午 又 看 了 全书 的 (2/5) ． 小 云 下午 看 了 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13487", "content": "豪 城 天下 有 105 栋 楼 ， 每栋 48 套房 ， 还有 43 套 未 住 人 ， 多少 套 已 住 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2623", "content": "一 根 钢材 长 24 米 ， 需要 锯 成 每 段 4 米 的 材料 ， 每 锯 一次 需要 2.5 分钟 ， 锯 完 这根 钢材 一共 需要 多长时间 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18996", "content": "687 比 48 与 296 的 和 多 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19626", "content": "学校食堂 运进 面粉 650 千克 ， 吃 了 5 天 后 还 剩 260 千克 ， 平均 每天 吃 面粉 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "905", "content": "一 个 长方体 的 长 是 8 厘米 ， 高 是 5 厘米 ， 它 的 底 面积 是 48 平方厘米 ， 那么 这个 长方体 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13416", "content": "一 种 电脑 ， 商家 按 成本 的 30% 赢利 定价 ， 为了 吸引 顾家 ， 又 以 “ 0.9 ” 卖出 ， 结果 每 台 电脑 仍 获利 680 元 ． 这种 电脑 成本 每 台 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16752", "content": "小 明 有 邮票 46 枚 ， 小 华 的 邮票 比 小 明 多 16 枚 ， 小强 的 邮票 枚 数 等于 小 华 的 3 倍 ． 小强 有 多少 枚 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12641", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 的 速度 36 千米 / 时 ， 用 了 4 小时 到达 乙地 ． 返回 时 用 了 3 小时 回到 甲地 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11458", "content": "一 个数 的 (1/5) 比 它 的 15% 多 50 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4813", "content": "计算 15.38 - 3.99 + 6.72 - 9.01 = ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5128", "content": "569 + 384 + 147 - 328 - 167 - 529 = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "5193", "content": "夏季 高山 上 的 温度 从 山脚 每 升高 1000 米 ， 约 下降 6 度 ， 已知 某 山脚 的 温度 是 27 度 ， 山顶 的 温度 是 13.2 度 ， 那么 这 座 山 的 高度 大约 = 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11057", "content": "学校 买 了 530 套 桌椅 ， 一张 桌子 168 元 ， 一把 椅子 32 元 ， 共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22498", "content": "乘坐 飞机 的 每位 乘客 ， 携带 行李 超过 20 千克 的 部分 ， 每千克 要 按 飞机票 原价 的 1.5% 购买 行李 票 ． 从 武汉 到 海南 的 飞机票 原价 是 1300 元 ， 可 按 0.8 出售 ． 李 叔叔 带 了 30 千克 行李 ， 正好 要 乘坐 这 架飞机 ， 试 求 他 买 飞机票 和 行李 票 一共 要 多少 钱 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "490", "content": "两个 因数 的 积 是 0.65 ， 一个 因数 扩大 到 原来 的 10 倍 ， 另 一个 因数 缩小 到 它 的 (1/100) 积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22670", "content": "一 捆 电线 长 150 米 ， 第一次 用 去 18 米 ， 第 二 次 用 去 的 是 第一次 的 3 倍 ， 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7919", "content": "某 数 被 13 除 ， 商 是 9 ， 余数 是 8 ， 则 某 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8826", "content": "修 一条 公路 ， 已经 修 了 全长 的 (3/4) ， 如果 再 修 50 米 ， 则 余下 全长 的 10% 没有 修 ， 这 一条 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23111", "content": "一 本书 400 页 ， 小 刘 每天 看 这 本书 的 (1/10) ， 是 小 李 每天 看 的 (4/5) ． 小 李 每天 看 了 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17625", "content": "544 名 师生 去 秋游 ， 68 人 坐 一辆车 ， 一共 需要 几辆车 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10752", "content": "学校 买来 640 本书 ， 准备 放在 2 个 书架上 ， 每个 书架 有 4 层 ， 平均 每层 放 几本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14373", "content": "一 个 哈密瓜 的 质量 等于 它 的 75% 再 加上 (3/4) 千克 ， 这个 哈密瓜 的 质量 = 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17471", "content": "张 小 云 有 75 张 邮票 ， 李 华 的 邮票 是 他 的 (7/15) ， 他们 俩一 共有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19333", "content": "小 华 家 的 客厅 一共 铺 了 64 块 地砖 ， 每 8 块 地砖 的 面积 是 2 平方米 ， 小 华 家 客厅 的 面积 = 多少 平方米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8597", "content": "小 明 看 一本 故事书 ， 前 5 天 每天 看 12 页 ， 最后 一天 看 了 20 页 ， 正好 看 完 这 本书 ， 这本 故事书 一共 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12434", "content": "一 个数 的 (1/12) 是 2.5 的 4 倍 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21259", "content": "邮局 汇款 的 汇率 是 1% ， 在外 打工 的 小 明 的 爸爸 给 家里 汇钱 ， 一共 交 了 38 元 的 汇费 ， 小 明 的 爸爸 一共 给 家里 汇 了 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5834", "content": "一 个数 的 (7/12) 是 80 ， 这个 数 的 (1/5) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3571", "content": "学校食堂 买 回 一些 大米 ， 每天 吃 141 千克 ， 吃 了 5 天 还 剩 95 千克 ， 学校 共运 来 多少 千克 大米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19257", "content": "6 个 14 连 加 的 和 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21539", "content": "小 程 的 身高 是 155 厘米 ， 小强 的 身高 比 小 程 矮 (1/5) ． 小强 的 身高 = 多少 厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11034", "content": "学校 图书室 有 新书 117 本 ， 借出去 9 本 ， 剩下 的 书 是 借出去 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16389", "content": "王 叔叔 从 江门 出发 到 湛江 送货 ， 前 2 小时 的 速度 是 60 千米 / 小时 ， 后 3 小时 的 速度 是 50 千米 / 小时 ， 王 叔叔 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18683", "content": "75 与 25 的 和 除以 它们 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6376", "content": "一 个数 加上 它 的 25% 正好 等于 15 的 (2/3) ， 这个 数 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14851", "content": "修 一段路 ， 甲队 单独 修 比 乙 队 单独 修 少 用 2 天 ． 已知 甲队 每天 可以 完成 这 段 路 的 (1/6) ， 则 乙 队 要 用 多少 天 可以 修 完 这 段 路 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12094", "content": "班级 召开 联欢会 ， 大家 围成 一个 椭圆形 ， 在 男孩 小 明 的 左边 依次 是 2 名 女同学 ， 一名 男同学 ， 又 4 名 女同学 ， 一名 男同学 ， 6 名 女同学 ， 一名 男同学 ， 如此 下去 ， 在 小 明 的 右边 排列 规律 与 他 的 左边 相同 ， 直至 两名 男同学 之间 有 8 名 女同学 ， 那么 ， 小 明 班级 共有 学生 多少 名 ．", "knowledge": ["+"], "difficulty": 1.2, "length": 27}
-{"question_id": "8785", "content": "某 电脑公司 5 月份 计划 装 1500 台 电脑 ， 实际 完成 1800 台 ， 这个 月 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10245", "content": "把 一根 木头 锯 成 2 段 要 3 分钟 ， 把 这根 木头 锯 成 5 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20760", "content": "( (24/10) + (16/17) ) * (1/8) + (15/17) = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3900", "content": "小 红 参加 一 次 科学 测验 ， 一共 有 20 道 是非题 ， 对 一 题 得 5 分 ， 错 一 题 扣 2 分 ． 小 红 得 了 79 分 ， 小 红 做 对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4457", "content": "为 缓解 道路 拥挤 的 情况 ， 我市 国道 正在 进行 道路 拓宽 ， 由 原来 的 18 米 拓宽 到 24 米 ， 拓宽 了 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19600", "content": "有 一块 布 长 5 米 ， 正好 可以 做 6 条 同样 大小 的 童裤 ． 每 条 童裤 用布 几分 之 几米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18030", "content": "一 辆 汽车 从 甲地 到 乙地 ， 第一 小时 行 了 全长 的 20% ， 第 二 小时 比 第一 小时 多行 15 千米 ， 离 乙地 还有 165 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13864", "content": "□ / ○ = 15 … 8 ， ○ 最小 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5010", "content": "学校食堂 购进 一批 酸奶 30 盒 ， 每盒 有 8 杯 ， 每杯 酸奶 (4/15) 升 ， 这 批 酸奶 共 多少 升 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19991", "content": "一 个 图书馆 有 12 个 同样 的 书架 ， 每个 书架 有 3 层 ， 每层 放 250 本书 ． 这些 书架 一共 能 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7239", "content": "一 个数 除以 6 ， 商 150 余 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22394", "content": "王 大伯 家 今年 粮食产量 达到 28 吨 ， 比 去年 增产 3 吨 ． 今年 比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6382", "content": "工地 上 要 运送 20 吨 黄沙 ： 先 用 一辆 载重 4 吨 的 汽车 运 3 次 ， 剩下 的 用 一辆 载重 为 0.5 吨 的 板车 运 ， 板车 还 需 运 几次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10467", "content": "每吨 黄豆 榨油 (13/100) 吨 ， (25/39) 吨 黄豆 可以 榨油 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3328", "content": "张 阿姨 将 3000 元 钱 存入 银行 ， 存期 为 2 年 ， 年利率 2.7% ． 到期 取款 时 ， 张 阿姨 可以 取 到 本金 和 利息 共 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1877", "content": "小 明 一不小心 把 一个 长 8 分 米 ， 宽 6 分 米 ， 深 4 分 米 的 长方体 玻璃 鱼缸 的 前面 玻璃 碰坏 了 ， 现在 要 修补 这个 鱼缸 ， 应 配 上 一块 面积 = 多少 平方分米 的 玻璃 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4586", "content": "把 一根 木头 ， 锯 成 9 段 ， 锯下 一段 占 总 次数 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20719", "content": "一 个 篮球 45 元 ， 一个 足球 76 元 ． 学校 买 了 相同 数量 的 篮球 和 足球 ， 相差 248 元 ． 学校 买来 篮球 和 足球 各 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9464", "content": "王师傅 给 一家 公司 运 200 块 玻璃 ， 每块 运费 0.6 元 ， 如果 打破 一块 ， 除 不得 运费 外 ， 还 需 赔偿 4 元 ， 结果 该 公司 付给 王师傅 106.2 元 运费 ， 问 ： 打破 了 几块 玻璃 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2486", "content": "一 辆 卡车 4 次 运 来 面粉 136 袋 ． 照 这样 再 运 8 次 ， 一共 可以 运 来 面粉 多少 袋 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2440", "content": "有 一个 正方体 ， 其中 3 面 涂成 绿色 ， 2 面 涂成 蓝色 ． 1 面 涂成 红色 ． 抛 了 9 次 ， 发现 有 8 次 是 绿色 的 面朝 上 ． 现在 抛 第 10 次 ． 朝 上 的 面 是 绿色 的 可能性 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2539", "content": "把 一根 木头 据 成 10 段 ， 每 锯 一次 要 3 分钟 ， 锯 完 一共 要 用 多少 分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5783", "content": "三年级 学生 上午 做 红旗 50 面 ， 下午 做 了 45 面 ． 每 5 面 一盒 ， 可以 装 多少 盒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17227", "content": "一 桶 汽油 ， 第一次 倒 出 (3/8) 升 ， 第 二 次 倒 出 (7/12) 升 ， 现在 还 剩 (19/24) 升 ． 原来 这 桶 汽油 有 多少 升 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15982", "content": "一 个 圆柱形 水桶 的 容积 是 24 立方分米 ， 内 底 面积 是 6 平方分米 ， 差 (1/4) 就 装满 了 水 ， 水面 多 高 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21498", "content": "一 个 大厅 长 24.8 米 ， 宽 9.6 米 ， 用 每块 0.32 平方米 的 方砖 铺 地 ， 需要 多少 块 这样 的 方砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22490", "content": "计算 ： 62 + 59 + 70 + 53 + 55 + 58 + 63 + 60 + 64 + 56 = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "15966", "content": "王师傅 要 生产 1400 个 零件 ， 已经 生产 了 450 个 ， 剩下 的 要 在 19 小时 内 完成 ， 那么 每 小时 应该 完成 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2307", "content": "现在 成本 比 原来 降低 (1/4) ， 现在 成本 是 原来 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15345", "content": "妈妈 去 超市 买 东西 花 了 76.8 元 ， 还 剩下 29.8 元 ， 妈妈 买 东西 共 带 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "2357", "content": "一 台 彩电 的 价钱 是 2500 元 ， 一台 洗衣机 的 价钱 是 彩电 的 (4/5) ． 一台 微波炉 的 价钱 是 洗衣机 的 (3/4) ． 一台 微波炉 的 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16195", "content": "4 、 五年级 的 学生 采集 树种 ， 四年级 采集 树种 18.6 千克 ， 四年级 比 五年级 少 采集 2.5 千克 ， 两个 年级 一共 采集 多少 千克 树种 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6410", "content": "学校 想 买 一批 课桌椅 ， 全 买 桌子 可以 买 30 张 ， 全 买 椅子 可以 买 60 把 ， 如果 成套 的 买 可以 买 多少 套 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22984", "content": "糖水 中 糖 和 水 的 重量 比 是 1 ： 9 ， 这时 糖 的 重量 占 糖水 重量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "66", "content": "一 个 工人 锯木 料 ， 他 用 15 分钟 把 一段 长 木料 锯 成 了 4 段 ， 如果 保持 工作 速度 不变 ， 再 把 每 段 木料 锯 成 两段 ， 还 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7382", "content": "体育 用品商店 出售 一种 排球 ， 打 0.75 出售 每个 是 36 元 ， 这种 排球 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11314", "content": "除数 是 7 ， 商 是 13 ， 余数 是 6 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14467", "content": "三年级 学生 参加 广播操 比赛 ， 共 排 了 38 列 ， 每 列 27 人 ， 三年级 共有 多少 人 参加 了 比赛 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7366", "content": "水果店 运 来 苹果 ， 梨子 和 桔子 共 98 千克 ． 苹果 重 45 千克 ， 梨子 重 18 千克 ， 桔子 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6588", "content": "某 商店 规定 3 个 空 汽水瓶 可以 换 一瓶 汽水 ． 小 华 买 了 10 瓶 汽水 ， 吃 完 后 用 空 汽水瓶 去 换 汽水 ． 小 华 一共 可以 喝 到 多少 瓶 汽水 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12770", "content": "甲 有 140 元 ， 甲 的 钱 数 是 乙 的 2 倍 ， 甲乙 共有 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5263", "content": "一 根 水管 ， 第一次 截去 全长 的 (3/20) ， 第 二 次 截去 余下 的 (3/10) ， 两次 共 截去 全长 的 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22654", "content": "甲 、 乙 两 人 共 生产 零件 450 个 ， 其中 甲 生产 的 零件 个数 是 乙 的 1.5 倍 ， 乙 生产 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7545", "content": "一 间 教室 的 长 是 10 m ， 宽 是 8 m ， 高 是 4 m ． 要 粉刷 教室 的 屋顶 和 4 面 墙壁 ， 除去 门窗 和 黑板 面积 25 m ^ 2 ， 粉刷 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "1421", "content": "小 明 在 银行 存 活期储蓄 1200 元 ， 每月 的 月利率 是 0.72% ， 存 满 6 个 月 后 ， 可 取出 本金 和 利息 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21545", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相对 开出 ， 甲 车 每 小时 行 50 千米 ， 乙 车 每 小时 行 完全 程 的 10% ， 当 乙 车行 到 全程 的 (3/5) 时 ， 甲 车行 完 了 全程 的 (5/8) ， a 、 b 两地 相距 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3865", "content": "某 品牌手机 ， 原价 5800 元 ， 节日期间 优惠 20% ， 节日期间 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4029", "content": "一 车 水果 ， 第一天 运走 它 的 (1/3) ， 第 二 天 运走 它 的 (1/6) ， 还 剩 这 车 水果 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17958", "content": "福林 小区 进行 路面 改造 ， 压路机 的 滚筒 直径 是 0.8 米 ， 长 1.5 米 ， 如果 这个 滚筒 每分钟 转 50 周 ， 这 台 压路机 每分钟 能 压 路面 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2839", "content": "5 一班 共有 50 名 同学 ， 会 游泳 的 有 27 人 ， 会 演奏 乐器 的 有 18 人 ， 这 两样 都 不会 的 有 15 人 ． 既 会 游泳 又 会 演奏 乐器 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9066", "content": "抄写 一份 材料 ， 王老师 单独 抄 要 (1/2) 小时 抄 完 ； 李老师 单独 抄 要 (1/3) 小时 抄 完 ． 如果 王老师 和 李老师 一起 抄 ， 多长时间 能 抄 完 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13355", "content": "一 盘 苹果 吃 了 它 的 (2/5) ， 剩下 的 是 这 盘 苹果 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5334", "content": "一 批 水果 500 千克 ， 含水率 90% ， 一 星期 后 含水率 为 80% ， 这 批 水果 现在 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6669", "content": "李 冬 看 一本 故事书 ， 第一天 看 了 全书 的 (1/12) 还 少 5 页 ， 第 二 天 看 了 全书 的 (1/15) 还 多 3 页 ， 还 剩 206 页 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22698", "content": "有 一袋 米 ， 第一周 吃 了 (2/5) ， 第 二 周 吃 了 12 千克 ， 还 剩 6 千克 ． 这 袋 米 原有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8684", "content": "小 丽 带 80 元 到 书店 买 书 ， 刚巧 碰上 书店 促销 ， 《 百科知识 》 丛书 打 0.75 ， 只 售 18.4 元 / 本 ． 小 丽 买 了 一套 4 本 的 《 百科知识 》 丛书 ， 又 剩下 的 钱 买 了 2 个 笔记本 ， 每个 笔记本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20575", "content": "原价 88 元 一本 的 词典 0.8 出售 ， 售价 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5730", "content": "正方体 a 的 棱 长 是 2 厘米 ， 正方体 b 的 棱 长 是 4 厘米 ， 正方体 a 的 体积 是 正方体 b 体积 的 百分之几 ？", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14793", "content": "一 个 平行四边形 的 面积 是 40 平方厘米 ， 高 是 5 厘米 ， 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2725", "content": "一 部手机 原价 2000 元 ， 活动 期间 按 0.8 销售 ， 降价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1640", "content": "学 具 厂 要 生产 1350 套 学 具 ， 已经 生产 了 860 套 ， 剩下 的 要 在 7 天 完成 ， 平均 每天 生产 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18973", "content": "围巾 按 20% 的 利润 标价 ， 售价 为 240 元 ， 那么 围巾 的 成本价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17875", "content": "小 李 的 袜子 筐 里 有 12 只 脏 袜子 和 20 只 干净 袜子 ． 这天 ， 他 迷迷糊糊 地 从 筐 中 拿 袜子 ， 每次 拿 两只 ． 如果 其中 有 脏 袜子 就 会 把 两只 都 扔 到 地上 ， 然后 从 筐 中 重 拿 ． 那么 ， 他 至少 拿 多少 次 才能 保证 一定 拿到 两只 干净 的 袜子 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19674", "content": "师徒 两 人 6 天 生产 了 894 个 零件 ． 师傅 每天 生产 81 个 ， 徒弟 每天 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16352", "content": "王老师 拿 200 元 钱 为 班级 买 图书 ， 买 了 13 本 ， 不同 的 童话故事 书 ， 找回 5 元 钱 ， 平均 每 本 童话故事 书 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2478", "content": "把 一个 数 扩大 为 原来 的 34 倍 后 是 20.4 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9614", "content": "王师傅 上 月 完成 生产 任务 的 102% ， 其中 上 半月 完成 计划 的 65% ， 则 下半月 完成 计划 的 百分之几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17598", "content": "一 辆 旅游 大巴 和 一辆 轿车 同时 从 上海 出发 ， 沿 沪宁 高速公路 开往 南京 ． 3 小时 后 ， 轿车 行驶 了 330 千米 ， 旅游 大巴 行驶 了 300 千米 ， 旅游 大巴 平均 每 小时 比 轿车 少 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16265", "content": "田径队 有 男生 16 人 ， 比 女生 的 (5/6) 多 6 人 ， 这个 田径队 共有 学生 多少 人 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4469", "content": "一 列 火车 每 小时 行驶 80 千米 ， (24/5) 小时 到达 目的地 ． 如果 这 列 火车 提速 (1/5) ， 那么 只 需要 几小时 就 能 到达 目的地 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9089", "content": "兰兰 正在 读 一本 科技 书 ， 第一周 读 了 90 页 ， 还 剩 这 本书 的 (1/3) 没有 读 ． 这本 科技 书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7217", "content": "一 个 圆柱 侧面 展开 是 一个 正方形 ， 这个 圆柱 的 底面 直径 是 4 厘米 ， 高 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "781", "content": "植树节 上 五年级 植树 120 棵 ， 六年级 比 五年级 多 植 40% ． 两个 年级 一共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "607", "content": "一 个 花 房里 ， 玫瑰 比 水仙 数量 少 20% ， 水仙 有 80 盆 ， 玫瑰 有 多少 盆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10862", "content": "学校 举办 运动会 ， 6 （ 1 ） 班 参加 比赛 的 女生 占 全班 人数 的 (1/7) ， 参加 比赛 的 男生 占 全班 人数 的 (1/4) ， 参加 比赛 的 女生 比 男生 少 6 人 ． 这个 班 参加 比赛 的 女生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15463", "content": "明明 说 “ 我 每分钟 大约 打 41 个 字 ” ， 5 分钟 能 打 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18217", "content": "快车 和 慢车 同时 从 东 、 西 两地 相对 开出 ． 已知 快车 每 小时 行 40 千米 ， 经过 3 小时 后 ， 快车 已 驶过 中 点 25 千米 ， 这时 与 慢车 还 相距 7 千米 ． 慢车 每 小时 行 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7153", "content": "一 件 上衣 打 0.7 后 ， 售价 是 280 元 ． 这件 上衣 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19935", "content": "唐 浩 的 爸爸 把 10000 元 人民币 存入 银行 ， 定期 3 年 ， 年利率 是 3.7% ． 到期 时 ， 唐 浩 的 爸爸 应得 本金 和 利息 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20942", "content": "修 一条 公路 ， 8 天 修 了 这 条 路 的 (8/15) ， 照 这样 计算 ， 修 完 这 条 路 共 需 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6195", "content": "一 辆 汽车 往 山区 送货 ， 每 小时 行 42 千米 ， (6/7) 小时 到达 ． 原 路 返回 时 只用 了 (3/4) 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "839", "content": "20 个 同学 排成 队 做操 ， 小 红 前面 有 11 人 ， 小 红 的 后面 还有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5685", "content": "书店 运 来 一批 书 ， 第一天 卖 了 30% ， 第 二 天 卖 的 相当于 第一天 卖 的 120% ， 比 第一天 多 卖 30 本 ． 这 批 书 共 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14132", "content": "渔 沟 中心小学 三年级 有 5 个 班 ， 每班 都 是 52 人 ． 如果 每人 都 从 图书馆 借 2 本书 ， 这个 年级 的 学生 一共 借书 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20338", "content": "小 明 织 一条 120 厘米 长 的 围巾 ， 第一天 织 了 全长 (1/5) ， 第 二 天 织 了 全长 的 25% ． 还 剩下 多少 厘米 没有 织 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9952", "content": "一 列 火车 (3/4) 小时 行 90 千米 ， 照 这样 计算 ， 还要 行 3 小时 才能 到 乙地 ， 甲 、 乙 两地 铁路 长 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4253", "content": "小 华 从 学校 步行 回家 要 20 分 ， 骑 自行车 回家 要 10 分 ． 小 华 步行 每 分 走 45 米 ， 他 骑 自行车 每 分行 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18722", "content": "甲 、 乙 两地 相距 480 千米 ． 大 货车 和 客车 同时 从 甲 、 乙 两地 相对 开出 ， 4 小时 后 两车 相遇 ， 大 货车 每 小时 行 45 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13984", "content": "已知 甲 、 乙 两 数 的 商 及 差 都 等于 5 ， 那么 甲 、 乙 两 数 的 和 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9634", "content": "在 一幅 条形 统计图 中 ， 用 0.5 厘米 长 的 直 条 表示 5 吨 ， 用 多少 厘米 长 的 直 条 表示 28 吨 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17971", "content": "一 个 服装厂 做一套 服装 原来 需要 3.8 米 布料 ， 改进 方法 后 ， 每套 衣服 只 需 3.6 米 布料 ． 原来 准备 做 180 套 服装 的 布料 ， 现在 可以 做 服装 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10889", "content": "5 吨 的 (1/3) 与 1 吨 的 ( ( ( ) ) / ( ( ) ) ) 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12056", "content": "工厂 要 加工 1200 个 零件 ， 计划 20 天 完成 ， 实际 3 天 就 完成 了 20% ， 照 这样 计算 ， 可 提前 几天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20247", "content": "果园 里 有 桃树 8 行 ， 每行 14 棵 ， 移走 一些 后 ， 还有 82 棵 ． 移走 了 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6632", "content": "师徒 两 人 合 做 一批 零件 ， 徒弟 做 了 总数 (2/7) ， 比 师傅 少 做 21 个 ， 这 批 零件 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4034", "content": "56 名 少先队员 参加 学校 劳动 ， 其中 (3/7) 的 人 打扫 礼堂 ， 剩下 的 队员 中 (3/8) 的 人 打扫 操场 ， 再 剩下 的 (1/4) 打扫 教室 ， 其余 的 人 负责 打扫 室外 空地 ， 问 打扫 空地 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "14319", "content": "某 工厂 下半年 用 煤 240.5 吨 ， 比 上半年 多用 24.36 吨 ， 这个 工厂 全年 共用 煤 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16582", "content": "把 一个 长 14 分 米 ， 宽 5 分 米 的 长方形 拉 成 一个 平行四边形 ， 面积 减少 28 dm ^ 2 ， 拉 成 的 平行四边形 的 高 = 多少 分 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3833", "content": "图书室 有 少儿读物 280 本 ， 借给 8 个 班 ， 每班 25 本 ， 还 剩 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19905", "content": "李 林 去年 9 月 1 日 在 银行 定期存款 2000 元 ， 按 年利率 2.25% 计算 ， 一年 到期 后 可 得 税后 利息 多少 元 ？ （ 利息 税率 20% ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "660", "content": "一 个 足球 150 元 ， 一个 篮球 120 元 ， 学校 各 买 了 8 个 足球 和 篮球 ， 买 足球 比 买 篮球 多用 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13535", "content": "鸡 比 鸭 少 210 只 ， 鸡 的 只 数 和 鸭 的 只 数 比 是 2 ： 5 ． 鸭 有 多少 只 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9159", "content": "港 华 天然气 公司 在 进行 管道 施工 中 ， 实际 铺设 管道 1200 米 ， 比 计划 多 铺 20% ， 港 华 天然气 公司 计划 铺设 管道 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16002", "content": "长安 小学 有 一块 长方形 花圃 ， 长 8 米 ． 在 修建 校园 时 ， 花圃 的 长 增加 了 3 米 ， 这样 花圃 的 面积 就 增加 了 18 平方米 ． 花圃 原来 = 多少 平方米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19702", "content": "一 条 绳子 剪掉 它 的 (1/5) ， 再 接上 40 米 ， 结果 正好 与 原来 一样 长 ． 这 条 绳子 原来 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "384", "content": "6000 / 59 与 35 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7074", "content": "昆明 到 玉溪 的 公路 长 96 千米 ， 一辆 客车 行驶 到 全程 的 (5/8) 处 ， 已经 行驶 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9715", "content": "一 堆 煤 用 去 了 20.96 吨 ， 余下 的 是 用 去 的 25% ． 这 一堆 煤 共 重 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15837", "content": "甲 、 乙 两车 从 相距 690 千米 的 两城 相向 而 行 ， 甲 车 每 小时 行 60 千米 ， 甲 车 先行 1 小时 后 乙 车 才 出发 ． 乙 车 每 小时 行 80 千米 ， 甲 车 开出 几小时 后 与 乙 车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "688", "content": "一 件 工作 ， 甲 4 小时 可以 完成 它 的 (1/6) ， 那么 甲 完成 这件 工作 需 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1511", "content": "学校 运 来 (2/5) 吨 水泥 ， 运 来 的 黄沙 比 水泥 的 2 倍 还 多 (1/8) 吨 ， 运 来 黄沙 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9354", "content": "王老师 买 体育用品 ， 买 篮球 用 去 75 元 ， 买 羽毛球拍 用 去 55 元 ， 付给 营业员 200 元 ． 应该 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16426", "content": "水果店 有 35 筐 橘子 、 55 筐 梨 ， 苹果 的 筐 数 是 橘子 和 梨 的 总数 的 (1/2) ， 苹果 有 几 筐 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "650", "content": "一 个数 的 (3/4) 是 24 ， 这个 数 的 (3/8) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11827", "content": "一 只 麻雀 的 体重 是 81 克 ， 恰好 是 蜂鸟 的 40 倍 ． 一只 蜂鸟 重 多少 克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10514", "content": "既 不是 质数 也 不是 合数 的 数 是 0.1 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5682", "content": "小雅 读 一本 名著 ， 第一天 读 了 一部分 后 ， 已 读 的 页数 与 未 读 页数 的 比 是 5 ： 7 ， 第 二 天 又 读 了 92 页 ， 这时 已 读 的 页数 是 未 读 页数 的 4 倍 ． 第一天 读 了 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "17095", "content": "尚 老师 买 了 25 筒 乒乓球 ， 每 筒 6 个 ． 购买 乒乓球 花 了 300 元 钱 ， 每个 乒乓球 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4505", "content": "一 桶 油 ， 用 去 25% ， 正好 用 去 了 7 千克 ， 则 这 桶 油 原来 有 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14172", "content": "商店 有 黄 气球 38 个 ， 红 气球 25 个 ， 花 气球 比 黄 气球 与 红 气球 的 总数 少 19 个 ， 花 气球 有 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3655", "content": "育 红 小学 六年级 参加 田径比赛 的 人数 有 48 人 ， 比 参加 球类 比赛 的 人数 少 20% ． 参加 球类 比赛 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15143", "content": "学校 修建 一座 教学楼 ， 实际 投资 186 万元 ， 比 计划 投资 节省 了 14 万元 ， 则 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19933", "content": "筑路 队 修 一条 2000 米 长 的 路 ， 第一天 修 了 全路 的 (1/4) ， 第 二 天 修 了 余下 的 (3/5) ， 还 剩 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "239", "content": "一 个 长方体 木块 ， 长 15 cm ， 宽 10 cm ， 高 8 cm ， 把 它 削成 最大 的 正方体 ， 削去 部分 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9477", "content": "长方形 的 长 与 宽 的 比 是 5 ： 3 ， 长 是 18 厘米 ， 宽 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1144", "content": "小 明 数学 考 了 85 分 ， 比 语文 少 考 (2/19) ， 比 语文 少 考 多少 分 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9817", "content": "从 72 里 连续 减去 多少 个 6 ， 正好 减 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6710", "content": "某校 5 月份 电话费 240 元 ， 比 4 月份 节约 60 元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16388", "content": "晓 红 3 天 看 完 一 本书 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 了 全书 的 (9/20) ， 第 3 天 看 了 120 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16565", "content": "在 一张 长 6 厘米 、 宽 3 厘米 的 长方形 纸 上 ， 可以 画 多少 个 边长 为 1 厘米 的 正方形 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16246", "content": "新华 食品 商场 二 月份 营业额 是 240 万元 ， 缴纳 了 12 万元 的 营业税 ， 税率 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15771", "content": "一 个数 除以 35 的 商 是 18 ， 这个 数 除以 7 的 商 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3465", "content": "打字员 小张 要 打 360 页 稿子 ， 原 计划 每天 打 60 页 ， 实际 每天 打 90 页 ， 这样 小张 可以 比 原 计划 提前 几天 打 完 这份 稿子 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1644", "content": "如果 除数 是 31 ， 商 是 12 ， 余数 是 20 ， 那么 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22309", "content": "一 根 绳子 对折 2 次 后 ， 每 段长 9.25 米 ， 这根 绳子 总长 多少 米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4472", "content": "用 一张 长 10 厘米 ， 宽 5 厘米 的 长方形 纸 ， 围成 一个 圆柱 ， 这个 圆柱体 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12411", "content": "电视机 在 关机 状态 下 也 会 悄悄 消耗 能量 ， 只要 没 拔掉 插头 ， 每 小时 也 会 耗电 约 0.008 千瓦时 ． 如果 小 丽 家 电视机 插头 从来不 拔 ， 按 每天 待机 20 小时 计算 ， 她家 一年 在 这 一项 上 要 多 消耗 多少 电 ？ （ 一年 按 365 天 计算 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13278", "content": "“ 6 • 一 ” 儿童节 老师 买 奖品 花 了 15.8 元 ， 还 剩 44.2 元 ， 老师 带 了 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15316", "content": "小 华 看 一 本书 ， 每天 看 8 页 ， 看 了 5 天 ， 还 剩 24 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16181", "content": "师父 和 徒弟 共同 加工 零件 8 小时 ． 师父 每 小时 加工 56 个 ， 徒弟 每 小时 加工 28 个 ， 师徒 两 人 一共 加工 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15479", "content": "筑路 队 要 修 800 米 的 公路 ， 已修 了 240 米 ， 余下 的 要 在 8 天 内 修 完 ， 平均 每天 应 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6447", "content": "甲 、 乙 二 人 在 一个 长 400 米 的 环形 跑道 上 从 同 一点 ， 同时 反向而行 ， 甲 每分钟 走 45 米 ， 乙 每分钟 走 35 米 ． 多少 分钟 后 两 人 第一次 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11293", "content": "有 一桶 油 ， 倒 出 (3/5) 后 ， 桶 里 还 剩 30 升 ， 这 桶 油 原来 有 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16210", "content": "一 张 课桌 的 价格 为 72 元 ， 一把 椅子 的 价格 为 28 元 ， 买 这样 的 50 套 课桌椅 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6947", "content": "菜市场 运 来 一批 西红柿 ， 第一天 卖出 了 总数 的 40% ， 第 二 天 卖 了 1200 千克 ， 还 剩 600 千克 ． 这 批 西红柿 共有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10453", "content": "一 个 学校 去年 六年级 的 学生 人数 是 180 人 ， 今年 比 去年 增加 了 (1/6) ， 这个 学校 今年 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20427", "content": "8 台 同样 的 织布机 4 小时 织布 960 米 ， 平均 每 台 织布机 每 小时 织布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "134", "content": "果园 里 有 120 棵 梨树 ， 桃树 棵 数 是 梨树 的 (5/6) ， 苹果树 棵 数 比 桃树 少 (2/5) ， 苹果树 比 桃树 少 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13383", "content": "一 辆 快车 和 一辆 慢车 同时 从 甲乙 两地 相向 而 行 ， 3 小时 后 ， 快车 距 乙地 还有 全程 的 (1/4) ， 慢车 距 甲地 还有 54 千米 ， 已知 快车 每 小时 比 慢车 多行 5 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19604", "content": "纺织 公司 有 男 职工 106 人 ， 女职工 比 男 职工 的 4 倍 少 84 人 ． 女职工 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11148", "content": "希望 小学 的 操场上 有 150 名 学生 在 跳绳 和 打球 ． 其中 女生 54 名 ， 如果 有 63 名 学生 在 跳绳 ， 有 42 名 男生 在 打球 ， 那么 至少 有 多少 名 女生 在 跳绳 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13028", "content": "商店 运进 男 衬衫 16 箱 ， 女 衬衫 18 箱 ， 每箱 有 25 件 ， 共 运进 衬衫 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17707", "content": "把 一个 圆锥体 浸没 在 棱 长 10 厘米 盛 有 水 的 正方体 容器 里 ， 水面 上升 2 厘米 ， 这个 圆锥 的 体积 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13065", "content": "126 与 234 的 和 乘以 1035 / 45 的 商 ， 积 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20798", "content": "3 个 同学 跳绳 ， 小 明 跳 了 120 个 ， 小强 跳 的 是 小 明 跳 的 (4/5) ， 小 亮 跳 的 是 小强 跳 的 (2/3) ． 小 亮 跳 了 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12788", "content": "甲乙 两桶 油 ， 甲 有 油 10 千克 ， 如果 从 甲 桶 倒 出 (1/2) 给 乙 桶 ， 这时 甲乙 两桶 的 比 是 1 ： 7 ， 两桶 原来 有 多少 油 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "11833", "content": "一 个 乘数 是 6 ， 另 一个 乘数 是 7 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14658", "content": "盒子 里 有 12 个 大小 相同 的 乒乓球 ， 其中 有 5 个 黄色 的 ， 7 个 白色 的 ， 摸 到 白 球 的 可能性 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16356", "content": "一 个数 连续 减去 265 ， 减 14 次 以后 得数 为 100 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9390", "content": "某 粮食 仓库 上午 运出 大米 380 袋 ， 下午 运出 560 袋 ， 如果 每 袋 大米 重 50 千克 ． 这 一天 一共 运出 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6512", "content": "在 计算 3000 - （ 2600 - 125 * 8 ） 时 ， 先 算 括号 里面 的 多少 法 ， 再 算 括号 里 的 多少 法 ， 最后 算 多少 法 ， 结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5100", "content": "甲 每 小时 行 11 千米 ， 乙 每 小时 行 13 千米 ， 甲 从 南庄 向 南行 ， 同时 乙 从 北庄 向 北 行 ． 经过 3 小时 后 ， 两 人 相隔 80 千米 ． 南北 两 庄 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21196", "content": "我 班 64 位 同学 都 参加 了 “ 人生 意外保险 ” 每人 保险费 金额 为 6000 元 ， 保险费率 为 0.3% ． 课外活动 时 ， 小 孟 不 小心 手腕 骨折 ， 保险公司 调查 后 酌情 赔偿 了 1280 元 ， 这样 ， 保险公司 将 我 班 收取 的 保费 全部 给 了 小 明 后 ， 还要 贴补 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17768", "content": "利民 小学 在 “ 献爱心 ” 捐款 活动 中 ， 三年级 捐款 32 元 ， 四年级 捐 43 元 ， 五年级 捐款 的 元 数 是 3 、 四年级 捐款 总数 的 2 倍 ， 五年级 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20494", "content": "计算 ： （ 12345 + 23451 + 34512 + 45123 + 51234 ） / （ 1 + 2 + 3 + 4 + 5 ） = ．", "knowledge": ["+", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "12024", "content": "水果店 第一天 运回 苹果 600 箱 ， 第 二 天运 的 是 第一天 的 (3/4) 还 多 15 箱 ， 两天 共 运回 苹果 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22007", "content": "3 （ 2 ） 班 买 了 3 个 一样 的 排球 ， 付给 售货员 100 元 ， 找回 13 元 ， 每个 排球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7559", "content": "五年级 师生 向 希望 小学 捐书 150 本 ， 六年级 比 五年级 多 捐 (2/15) ． 六年级 师生 捐书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19635", "content": "青草 晒干 后 质量 会 减少 (2/5) ， 96 吨 青草 晒干 后 的 质量 将 = 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21034", "content": "水果店 运 来 苹果 96 筐 ， 运 来 梨 的 筐 数 是 苹果 的 (1/4) ， 又 是 桔子 筐 数 的 (2/3) ． 运 来 桔子 多少 筐 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4865", "content": "有 一台 电视 ， 原价 1200 元 ， 降 了 300 元 ， 价格 降 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9602", "content": "星期天 ， 小 明 的 爸爸 在 河里 钓 了 一条 鲫鱼 和 一条 鲤鱼 ， 一共 重 2 千克 ， 其中 鲤鱼 重 (3/2) 千克 ， 鲫鱼 比 鲤鱼 轻 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18244", "content": "希望 小学 一年级 有 学生 120 人 ， 比 二年级 学生 数 少 (1/4) ， 二年级 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19846", "content": "一 本书 120 页 ， 已 读 过 它 的 25% ， 再 读 时 应从 多少 页 读 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15931", "content": "榆树 和 夹竹桃 对 空气 中 的 尘埃 都 有 过滤 作用 ． 每平方米 榆树 叶 能 吸附 灰尘 12.8 克 ， 是 夹竹桃 叶片 的 1.6 倍 ． 每平方米 夹竹桃 叶片 能 吸附 灰尘 多少 克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17179", "content": "50 个 学生 解答 a 、 b 两 题 ， 其中 没 答对 a 题 的 有 12 人 ， 答对 a 题 的 且 没 答对 b 题 的 有 30 人 ． 那么 a 、 b 两 题 都 答对 的 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12977", "content": "光明 小学 每 16 个 学生 就 组成 一个 雏鹰 小队 ， 学校 共有 672 名 学生 ， 可以 组成 多少 个 雏鹰 小队 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7323", "content": "为 庆祝 元旦 ， 翠 湖 公园 每隔 6 米 摆放 1 盆 鲜花 ， 小 丽 从 第一 盆花 走 到 第 20 盆花 ， 一共 走 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2268", "content": "果园 里 有 桃树 156 棵 ， 苹果树 的 棵 树 比 桃树 的 3 倍 还 多 96 棵 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16703", "content": "育 红 小学 学生 参观 农业 展览 ． 他们 排成 4 行 ， 每行 人数 同样 多 ． 小 丽 排 在 第 2 行 ， 从前 数 是 第 9 人 ， 从 后 数 是 第 11 人 ． 参观 展览 的 一共 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3433", "content": "小 明 每分钟 跑 85 米 ， 小 红 每分钟 跑 的 米 数 是 小 明 的 (4/5) ． 小 红 每分钟 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18377", "content": "甲乙 两辆 汽车 同时 从 相距 360 千米 的 两地 相向 而 行 ， 4 小时 相遇 ， 如果 甲 车 每 小时 行 40 千米 ， 那么 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4929", "content": "4 （ 1 ） 班 有 男生 24 人 ， 女生 27 人 ， 他们 向 贫困山区 的 同学 捐 了 408 本书 ， 平均 每人 捐书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22791", "content": "儿童公园 里 的 商店 开张 营业 ， 饮料 6 元 3 瓶 ， 买 5 瓶 送 l 瓶 ． 现有 36 名 学生 ， 如果 每人 买 1 瓶 ， 至少 要 花 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7530", "content": "修 一条 路 ， 4 小时 修 320 米 ， 10 小时 可以 修 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23132", "content": "小 东家 在 8 楼 ， 小 东 每 上 一层楼 用 15 秒 ， 他 从 一楼 到 家 需要 多少 秒 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22652", "content": "甲 、 乙 两 船 同时 从 一个 码头 向 相反 方向 开出 ， 航行 5 小时 两 船 相距 225 千米 ， 已知 乙 船 每 小时 行 19.5 千米 ， 甲 船 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20381", "content": "甲 数 的 (1/3) 和 乙 数 的 (2/5) 相等 ， 乙 数 是 45 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22787", "content": "粮库 有 240 吨 粮食 ， 运走 总数 的 (1/5) ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11265", "content": "甲 、 乙 、 丙 3 人 进行 100 米 赛跑 ， 当 甲 到达 终点 时 ， 乙 离 终点 还有 8 米 ， 丙 离 终点 还有 12 米 ． 如果 甲 、 乙 、 丙 赛跑 时 速度 不变 ， 那么 ， 当 乙 到达 终点 时 ， 丙 离 终点 还有 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17947", "content": "张大妈 以 1 元 钱 3 个 苹果 的 价格 买进 许多 苹果 ， 又 以 2 元 钱 5 个 苹果 的 价格 将 这些 苹果 卖出 ． 今天 张大妈 净赚 10 元 钱 ， 请问 她 卖出 苹果 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22774", "content": "小强 的 身高 比 小 华 高 (1/9) ， 小 华 身高 135 厘米 ， 小强 身高 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12542", "content": "某 县城 到 省城 的 高速公路 长 160 千米 ， 普通 公路 长 200 千米 ． 一辆 汽车 走 高速路 的 速度 是 80 千米 / 时 ， 走 普通 公路 的 速度 是 40 千米 / 时 ． 从 县城 去 省城 走 高速路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7786", "content": "食堂 买来 大米 和 面粉 各 50 千克 ， 共 花 去 258.5 元 钱 ， 大米 每千克 2.9 元 ， 面粉 每千克 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11617", "content": "爸爸 买 回 了 一些 桔子 ， 吃 了 26 个 后 还 剩 9 个 ， 爸爸 买 回 了 多少 个 桔子 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9065", "content": "1966 + 1976 + 1986 + 1996 + 2006 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21118", "content": "(5/7) 和 (7/5) 的 乘积 = ， 这 两个 数 互为 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13786", "content": "一 根 铁丝 长 (7/10) 米 ． 第一次 剪 去 全长 的 (1/4) ， 第 二 次 剪 去 全长 的 (2/5) ． 还 剩 全长 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11472", "content": "中心小学 学生 抬 水 浇 树 ， 三年级 浇 了 50 棵 ， 四年级 比 三年级 多 浇 35 棵 ， 五年级 浇 的 棵 数 是 四年级 的 2 倍 ， 五年级 比 三年级 多 浇 多少 棵 树 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2094", "content": "一 辆 汽车 上山 用 30 千米 / 时 的 速度 行 了 4 小时 到 山顶 ， 下山 准备 用 3 小时 到达 山脚下 的 停车场 ， 如果 你 是 司机 ， 你 准备 汽车 行驶 的 速度 应该 = 多少 正好 可以 到 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23104", "content": "一 条 路 长 180 米 ， 在 它 的 一边 从头到尾 都 种 上 梧桐树 ， 每隔 3 米 种 一棵 ， 一共 要 种 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "28", "content": "早晨 教室 里 有 36 名 学生 ， 其中 女生 占 教室 里 总 人数 的 (5/9) ， 后来 又 来 了 几名 女生 ， 这时 女生 占 教室 里 总 人数 的 (11/19) ， 后来 又 来 了 几名 女生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19030", "content": "一 卷 600 米 长 的 电线 ， 第一次 用 去 128 米 ， 第 二 次 用 去 178 米 ， 这 卷 电线 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2906", "content": "回收 2 吨 废纸 可 生产 再生纸 1600 千克 ， 照 这样 计算 ， 回收 5 吨 废纸 可以 生产 再生纸 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23102", "content": "2.8 与 4 的 积 ， 减去 6.5 / 5 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9027", "content": "1 吨 大豆 可以 榨油 (7/20) 吨 ， 140 吨 大豆 可以 榨油 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11563", "content": "一 件 儿童 上衣 180 元 ， 一条 裤子 比 上衣 便宜 33 元 ， 一条 裙子 又 比 一条 裤子 贵 21 元 ． 这 条 裙子 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23157", "content": "果园 里 3 棵 梨树 去年 共产 梨 (5/6) 吨 ， 平均 每棵 梨树 产 梨 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19478", "content": "学校 图书馆 买来 一批 新书 ， 其中 科普 书 有 38 本 ， 文艺 书 有 67 本 ， 故事书 的 本 数 是 科普 书 和 文艺 书本 数 之 和 的 3 倍 ， 学校 买来 故事书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19015", "content": "小 明 读 一本 200 页 的 故事书 ， 已经 读 了 这 本书 的 (3/5) ， 他 读 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22090", "content": "某 工厂 男工 人数 有 600 人 ， 女工 人数 是 男工 人数 的 (2/3) ． 男 女工 一共 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14007", "content": "272 + 11 与 18 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12399", "content": "一 瓶 油 重 (9/10) 千克 ， 第一天 用 去 它 的 (3/10) ， 第 二 天 用 去 它 的 (1/5) ， 还 剩 它 的 几分 之 几 没用 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10447", "content": "仓库 原有 货物 128.5 吨 ， 运出 一部分 后 ， 又 运进 97.8 吨 ， 这时 仓库 内 有 货物 187.6 吨 ， 运走 货物 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19833", "content": "寒假 里 三年级 同学 制作 灯笼 45 个 ， 四年级 同学 制作 灯笼 的 个数 比 三年级 的 2 倍 少 18 个 ， 四年级 同学 制作 灯笼 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "370", "content": "小猫 杯 到 了 39 个 老鼠 ， 大 猫 捉 到 的 数量 是 小猫 的 4 倍 少 17 个 ． 大 猫 捉 了 多少 个 老鼠 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20830", "content": "新民 小学 买来 一些 课外读物 ， 平均 分给 15 个 班 ， 每班 分 到 40 本 ， 还 剩下 25 本 ． 一共 买来 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8462", "content": "2.1 * 1.1 * 0.54 / （ 5.4 * 1.21 / (5/21) ） = ．", "knowledge": ["*", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21132", "content": "一 道 除法 算式 ， 被除数 和 除数 同时 扩大 100 倍 后 ， 余数 是 35 ， 原 式 的 余数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11775", "content": "甲 、 乙 两地 相距 350 千米 ， 小 王 与 小 李 同时 从 甲 、 乙 两地 开车 相向 而 行 ． 小 王 的 车速 是 每 小时 80 千米 ， 小 李 的 车速 是 每 小时 60 千米 ． 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14775", "content": "学校 买来 125 套 桌椅 ， 每张 桌子 48 元 ， 每 把 椅子 32 元 ， 学校 一共 花费 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12004", "content": "朝阳 小学 买 5 个 足球 用 去 了 340 元 ． 学校 还 想 再 买 13 个 这样 的 足球 ， 还 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6109", "content": "两个 数 的 最大公约数 是 126 ， 最小 公倍数 是 7938 ， 其中 一个 数 是 1134 ， 则 另 一个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1487", "content": "62 与 5 的 差 乘 8 / 4 的 商 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22617", "content": "一 个 平行四边形 和 一个 长方形 的 面积 都 是 72 平方厘米 ． 长方形 长 18 厘米 ， 是 平行四边形 高 的 2 倍 ． 平行四边形 的 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1585", "content": "水果店 运 来 一批 水果 ， 卖出 (2/5) 后 还 剩下 24 千克 ， 水果店 运 来 水果 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2932", "content": "一 个 圆柱体 的 体积 是 (1/3) 立方米 ， 与 它 等 底 等 高 的 圆锥体 的 体积 = 多少 立方米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3269", "content": "水果店 运 来 20 箱 梨 ， 每箱 25 千克 ． 卖出 325 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13779", "content": "一 个 修路 队 计划 修 一条 长 2400 米 的 公路 ， 已经 修 了 955 米 ， 剩下 的 每天 修 85 米 ， 还要 修 多少 天 才能 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7379", "content": "学校 给 新建 的 教学大楼 每个 教室 安装 9 盏灯 ． 学校 共有 4 层楼 ， 每层 有 5 个 教室 ， 一共 要 安装 多少 盏灯 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20907", "content": "一 台 压路机 的 前轮 是 圆柱形 ， 直径 1 米 ． 前轮 转动 一周 ， 压路机 前进 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "189", "content": "一 块 平行四边形 的 街头 广告牌 ， 底 是 12.5 米 ， 高 是 6.4 米 ． 如果 要 油饰 这块 广告牌 ， 每平方米 用 油漆 0.6 千克 ， 需要 多少 千克 油漆 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18560", "content": "数学 兴趣小组 共有 30 人 ， 其中 男生 占 40% ， 女生 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9572", "content": "菜地 里 黄瓜 获得 丰收 ， 收下 全部 的 (3/8) 时 ， 装满 了 4 筐 还 多 36 千克 ， 收完 其余部分 时 ， 又 刚好 装满 8 筐 ， 求 共 收 黄瓜 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "18129", "content": "木匠 锯 一根 10 米 长 的 木头 ， 每 锯 一段 要 用 2 分钟 ． 如果 把 这根 木头 锯 成 相等 的 5 段 ， 一共 要 用 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18575", "content": "某班 有 学生 48 人 ， 参加 音乐 兴趣小组 的 有 20 人 ， 参加 美术 兴趣小组 的 有 27 人 ， 两种 小组 都 参加 的 有 18 人 ， 参加 兴趣小组 的 学生 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8195", "content": "学校 新 买来 56 个 篮球 和 45 个 排球 ， 一 共用 去 3020 元 ． 其中 每个 篮球 25 元 钱 ， 平均 每个 排球 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6421", "content": "同学 们 做 纸花 ． 做 红花 371 朵 ， 做 黄花 168 朵 ， 做 白花 的 朵 数 比 红花 和 黄花 的 总 朵 数 少 35 朵 ， 同学 们 做 白花 多少 朵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13492", "content": "水 结成 冰 后 ， 体积 增加 (1/10) ． 现有 一块 冰 ， 体积 是 2 立方分米 ， 融化 后 的 体积 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22713", "content": "小 明 身高 1.54 米 ， 比 小 华 矮 0.09 米 ． 小 华 身高 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7412", "content": "乘坐 空调 公交车 每人 需 投币 2 元 ， 如果 刷 ic卡 ， 则 每次 扣 费 1.6 元 ． 刷卡 比 投币 便宜 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9920", "content": "739 * 9 - 6138 / 3 最后 进行 多少 计算 ， 结果 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3444", "content": "一 辆 卡车 3 次 可 运 梨 240 筐 ， 一个 果园 要 运 2560 筐 梨 ， 用 4 辆 这样 的 卡车 来 运 ， 几次 能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16793", "content": "树 台 小学 去年 共有 学生 900 人 ， 今年 比 去年 增加 (4/9) ， 今年 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17991", "content": "有 浓度 为 5% 的 盐水 120 克 ， 浓度 为 7% 的 盐水 300 克 ， 浓度 为 12% 的 盐水 100 克 混合 在 一起 ， 得到 的 混合 溶液 的 浓度 为 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "2145", "content": "1128 / 38 与 14 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16869", "content": "2011.2011 / 2.011 * 201.1 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22401", "content": "一 个 水果店 上午 售出 42 千克 苹果 ， 下午 售出 54 千克 苹果 ． 这些 苹果 共 卖 了 288 元 ， 每千克 苹果 售价 = 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3283", "content": "两辆 汽车 分别 从 两地 相向 开出 ， 甲 车 每 小时 行 48.3 千米 ， 乙 车 每 小时 行 51.7 千米 ， 经过 6.3 小时 两车 在 途中 相遇 ， 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5337", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相对 开出 ， 相遇 后 继续 前行 ． 当 两车 又 相距 70 千米 时 ， 甲 行驶 了 全 路程 的 75% ， 乙 离 a 地 路程 与 已 行 路程 的 比 为 1 ： 2 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22550", "content": "小 明 和 爷爷 聊天 ， 小 明说 ： “ 您 和 爸爸 的 年龄 差 恰好 是 我 年龄 的 3 倍 ． ” 爷爷 笑笑 说 ： “ 你们 父子俩 的 年龄 加 起来 还 跟 我 差 18 岁 呢 ! ” 那么 小 明 今年 多少岁 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1680", "content": "2291 - 7 个 25 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7950", "content": "育 民 小学 有 男同学 840 人 ， 女同学 人数 是 男同学 的 (4/7) ， 这个 学校 有 女同学 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4107", "content": "图书室 里 原有 故事书 228 本 ， 科技 书 165 本 ， 后来 又 购进 这 两种 书 各 89 本 ， 这时 故事书 比 科技 书 多 几本 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20180", "content": "某校 建 修 塑胶 操场 计划 投资 120 万元 ， 实际 用 了 90 万元 ， 节省 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21295", "content": "女生 人数 是 男生 人数 的 (4/5) ， 则 男生 人数 比 女生 人数 多 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1692", "content": "两辆 轿车 从 相距 456 千米 的 两地 相向 而 行 ， 经 3 小时 相遇 ． 已知 甲 车 的 速度 是 72 千米 / 小时 ， 乙 车 的 速度 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5501", "content": "饮料 批发部 运 来 290 箱 饮料 ， 运 了 3 车 ， 还 剩 110 箱 ， 平均 每 车运 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2990", "content": "一 辆 自行车 前轮 的 直径 是 0.8 米 ． 如果 这辆 自行车 每分钟 转 100 圈 ， 那么 它 每分钟 可行 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22340", "content": "36 吨 少 (1/3) 后 = 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16713", "content": "某 建筑工地 有 两堆 水泥 共 900 袋 ． 如果 从 甲 堆 取出 40 袋 放入 乙 堆 ， 这时 甲 堆 的 水泥 是 乙 堆 的 4 倍 ， 原来 乙 堆 有 水泥 多少 袋 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15223", "content": "2010 年 遇到 百年一遇 的 大旱 ， 小 明 的 爸爸 和 妈妈 都 给 灾区 人民 捐 了 钱 ， 妈妈 捐 了 100 元 ， 爸爸 比 妈妈 多 捐 50% ， 爸爸 捐出 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20923", "content": "李 大 娘家 的 果园 今年 收 了 210 千克 苹果 ． 收 的 葡萄 比 苹果 的 19 倍 还 多 35 千克 ， 收 葡萄 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18431", "content": "5 （ 1 ） 班 的 同学 自发 组织 了 3 个 环保 小组 ． 其中 参加 垃圾 清理 小组 和 参加 废品 回收 小组 的 同学 的 占 全班 人数 的 (3/4) ， 参加 废品 回收 小组 和 参加 废品 归类 的 同学 占 全班 人数 的 (5/6) ， 参加 废品 回收 小组 的 同学 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14103", "content": "学校 图书馆 买来 260 本 新 图书 ， 其中 科技 书 占 55% ， 文艺 书 占 25% ， 其余 的 都 是 故事书 ， 故事书 有 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2245", "content": "6 一班 有 学生 50 人 ， 女生 占 40% ， 女生 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19709", "content": "一 本书 ， 小 明 计划 每天 看 (2/9) ， 多少 天 可以 看 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10687", "content": "张老师 为 某 报社 写稿 ， 稿费 收入 为 500 元 ， 需 缴纳 5% 的 个人所得税 ， 她 的 实际 纯收入 应为 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16549", "content": "8 辆 汽车 3 天 节约 汽油 109.56 千克 ． 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12893", "content": "客车 与 货车 分别 从 甲 、 乙 两地 同时 相对 开出 ， 6 小时 后 在 途中 相遇 ， 相遇 后 两车 继续 按 原来 的 速度 和 方向 前进 ， 又 经过 4 小时 客车 到达 乙地 ， 而 货车 离 甲地 还有 200 千米 ． 甲 、 乙 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "4133", "content": "杨 坊 寄宿制 小学 有 学生 650 人 ， 其中 有 96% 的 学生 入 了 保险 ， 没有 入 保险 的 学生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5046", "content": "一 根 塑料绳 剪 去 4 分 米 后 又 接上 6 分 米 ， 这时 比 原来 的 全长 多 了 (2/5) ， 这根 塑料绳 原来 全长 多少 分 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18808", "content": "赖 叔叔 家 的 果园 产 脐橙 4650 千克 ， 卖 了 150 箱 ， 还 剩下 450 千克 ． 每箱 脐橙 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21345", "content": "一 个 学生 在 爬山 中 ， 上山 下山 共用 4 小时 ， 如果 他 上山 用 2.4 小时 ， 原 路 返回 ， 下山 速度 是 每 小时 1.5 千米 ， 则 他 的 上山 速度 是 每 小时 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10456", "content": "有 两条 绸带 ， 第一条 长 6.2 米 ， 第 二 条 比 第一条 的 2 倍 少 0.2 米 ， 两条 绸带 共 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2758", "content": "加工 240 个 零件 ， 甲 每天 加工 这 批 零件 的 (1/8) ， 乙 每天 加工 这 批 零件 的 (1/4) ， 乙 每天 比 甲 多 加工 多少 个 零件 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15102", "content": "已知 两个 数 的 差 是 2345 ， 两 数 相除 的 商 是 8 ， 这 两 数 之 和 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6830", "content": "建筑工地 运 来 8000 吨 材料 ， 其中 沙石 占 总数 的 75% ， 运 来 沙石 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2412", "content": "水果店 运 来 一批 苹果 和 香蕉 ， 已知 它们 的 比 是 4 ： 5 ， 苹果 运 来 320 千克 ． 这 批 水果 共有 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15545", "content": "一 条 路 ， 甲 修 了 (1/4) ， 乙 修 了 30% ， 还 剩下 9 千米 ， 这 条 路 全长 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1190", "content": "在 一段 公路 上 ， 从 起点 到 终点 每隔 5 千米 设 一块 指示牌 ． 这 段 路上 共有 6 块 指示牌 ． 这 段 路 总长 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14083", "content": "一 件 上衣 标价 240 元 ， 售出 后 可以 获得 (1/5) 的 利润 ． 这件 上衣 的 成本 = 多少 元 ？ （ 利润 = 成本 * 利润率 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3243", "content": "一 只 轮船 从 甲 港 开往 乙 港 ， 8 小时 行 了 全程 的 (3/10) ， 再行 多少 小时 可以 到达 乙 港 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18291", "content": "工厂 6 月份 实际 每天 生产 600 个 零件 ， 20 天 完成 任务 ， 计划 每天 生产 500 个 零件 ， 比 计划 提前 多少 天 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11650", "content": "云 桂 高速铁路 要 挖 一条 1330 米 长 的 隧道 ， 为了 赶工期 ， 分别 由 甲乙 两个 工程队 同时 从 两头 相向 开凿 ． 甲队 每天 挖 15 米 ， 乙 队 每天 挖 20 米 ， 照 这样 的 速度 ， 多少 天 后 这 条 隧道 可以 挖通 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18716", "content": "陈 生 有 邮票 125 张 ， 饶 生 比 陈 生 多 (1/5) ， 饶 生 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12907", "content": "7 / 13 的 商用 分数 表示 是 ： 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18056", "content": "一 种 花生 的 出油率 是 40% ， 要 榨出 200 千克 的 花生油 ， 需要 这种 花生 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21464", "content": "一 个数 和 30 相乘 的 积 是 18000 ， 如果 这个 数 缩小 100 倍 ， 积 变成 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16005", "content": "一 本 童话 书 有 160 页 ， 张 山 已经 读 了 (2/5) ． 还有 多少 页 没 读 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3274", "content": "有 一个 停车场 上 ， 现有 24 辆车 ， 其中 汽车 是 4 个 轮子 ， 摩托车 是 3 个 轮子 ， 这些 车 共有 86 个 轮子 ． 其中 摩托车 有 多少 辆 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "479", "content": "被减数 是 789 ， 减数 是 658 ， 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "23029", "content": "书架上 有 6 本 不同 的 外语 书 ， 4 本 不同 的 语文 书 ， 从中 任 取 外语 、 语文 书 各 一本 ， 有 多少 种 不同 的 取法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10484", "content": "甲 、 乙 同时 从 a 、 b 两地 相向 走来 ． 甲 每 时 走 5 千米 ， 两 人 相遇 后 ， 乙 再 走 10 千米 到 a 地 ， 甲 再 走 1.6 时 到 b 地 ． 乙 每 时 走 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11805", "content": "91.5 + 88.8 + 90.2 + 270.4 + 89.6 + 186.7 + 91.8 = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "10993", "content": "一 个 修路 队 ， 15 天 修路 1800 m ， 实际 每天 比 计划 多 修 20 m ， 原 计划 每天 修路 多少 m ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2420", "content": "把 一批 苹果 装箱 ， 15 千克 装 一箱 ， 已经 装 了 80 箱 ， 还 剩下 66 千克 没有 装 ， 这 批 苹果 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18202", "content": "王师傅 从 5 月 1 日 到 8 月 31 日 这 123 天 中 加工 零件 6512 个 ， 这 4 个 月 中 王师傅 共 休息 了 35 天 ， 这 段时间 王师傅 平均 每天 加工 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15081", "content": "鱼缸 里 有 10 条 金鱼 ， 其中 4 条 是 红 金鱼 ， 其余 的 是 黑 金鱼 ， 黑 金鱼 有 多少 条 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12716", "content": "小 明 每天 早上 跑步 12 分钟 ， 他 的 速度 大约 是 每分钟 179 米 ， 他 每天 大约 跑步 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14262", "content": "小 冬 从 家 上 学校 每分钟 走 60 米 ， 15 分钟 到校 ， 放学 回家 时 ， 他 想 比 上学时 提前 3 分钟 到 家 ， 请 你 帮 小 冬 算 一 算 ， 他 每分钟 应 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19988", "content": "一 列 快车 和 一列 慢车 同时 从 两地 相对 开出 ， 快车 每 小时 行 78 千米 ， 慢车 每 小时 行 62 千米 ， 两车 出发 后 4.5 小时 相遇 ， 两地 之间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18607", "content": "897 * (3/8) - 37.5% + 104 * 0.375 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18736", "content": "欣欣 玩具厂 要 生产 玩具 1107 个 ， 前 6 天 平均 每天 生产 72 个 ， 余下 的 要 在 5 天 内 完成 任务 ， 平均 每天 生产 多少 个 玩具 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20437", "content": "学校 举办 艺术节 ， 准备 了 拉 花 和 气球 各 30 个 ， 共用 去 180 元 ． 气球 每个 1.5 元 ， 每个 拉 花 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6071", "content": "四年级 举重 兴趣小组 在 亚运会 期间 集体 到 体育馆 看 举重 比赛 ， 门票 68 元 / 人 ， 他们 去 了 18 人 ， 应该 准备 多少 钱 买票 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15364", "content": "要 把 570 吨 原料 运到 加工厂 ， 第一次 运走 总 重 的 (1/3) ， 第 二 次 运走 总 重 的 (2/5) ． 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15242", "content": "王 强 工作 3 天 得到 540 元 报酬 ， 照 这样 计算 ， 他 工作 20 天 可以 得到 报酬 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "196", "content": "一 本 字典 厚 40 毫米 ， 一本 数学 书 厚 5 毫米 ， 几本 数学 书 的 厚度 与 一本 字典 的 厚度 一样 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15761", "content": "某 畜牧场 养羊 1500 头 ， 比 牛 的 数量 多 (1/3) ， 这个 畜牧场 养牛 多少 头 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1245", "content": "小 丽 的 妈妈 今年 34 岁 ， 比 小 丽 年龄 的 3 倍 少 2 岁 ， 小 丽 今年 几岁 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4031", "content": "一 个 车间 要 生产 一批 零件 ． 平均 每天 要 生产 60 个 ， 7 天 后 还 剩下 350 个 没有 生产 ． 这 批 零件 共 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16989", "content": "一 根 绳子 长 50 米 ， 做 了 6 根 同样 的 跳绳 后 ， 带 还 剩 38 米 ， 平均 每 根 跳绳 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "957", "content": "计算 200.9 * 191.2 - 2010 * 19.11 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14036", "content": "某校 六年级 有 学生 160 人 ， 比 五年级 多 25% ， 五年级 学生 是 全校 人数 的 (1/7) ， 这个 学校 有 学生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6375", "content": "一 个 平行四边形 的 底 是 3 cm ， 高 是 3.7 cm ， 它 的 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9567", "content": "一 批 煤 ， 一辆 货车 每次 运 8 吨 ， 运 了 16 次 后 还 剩 42 吨 ， 这 批 煤 一共 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13978", "content": "一 个数 除以 16 ， 商 是 20 ， 余数 是 10 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6626", "content": "平行四边形 的 高 是 4 厘米 ， 面积 是 248 平方厘米 ， 平行四边形 的 底 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10111", "content": "商店 运 来 3 车 苹果 ， 每 车 8 箱 ， 雪梨 运 来 6 箱 ， 运 来 的 苹果 箱 数 是 雪梨 的 多少倍 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14176", "content": "洗衣机 的 价格 从 每 台 1500 元 降到 每 台 1200 元 ， 价格 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2805", "content": "有 一捆 电线 一共 长 100 米 ， 剪下 24.8 米 ． 剩下 的 比 剪下 的 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7356", "content": "一 件 商品 涨价 10% 后 ， 又 涨价 15% ， 现在 降价 20% ， 这 商品 现在 价格 是 原来 的 百分之几 ？ 多少 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "13648", "content": "一 个 长方形 的 长 是 13 厘米 ， 宽 是 8 厘米 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4639", "content": "新华书店 为 庆祝 儿童节 ， 买 4 套 送 1 套 ， 已知 原来 每套 45 元 ， 一次 买 5 套 ， 每套 便宜 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6072", "content": "1250 - 28 与 5 的 积 再 加上 95 ， 和 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1704", "content": "一 段 公路 ， 已修 的 长度 与 未 修 的 长度 的 比 是 3 ： 5 ， 如果 再 修 55 米 ， 已修 的 长度 就 占 全长 的 (4/7) ． 这 段 公路 有 多长 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9052", "content": "有 48 个 桃子 ， 平均 分给 2 只 猴子 ， 每 只 猴子 分 多少 个 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15003", "content": "甲 城 到 乙 城 的 路程 是 800 千米 ， 一辆 汽车 前 6 小时 行 了 全程 的 (3/5) ． 照 这样 的 速度 ， 行 完全 程 一共 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19361", "content": "电影院 大 门前 有 8 级 台阶 ， 每 级 台阶 长 7 米 ， 宽 0.4 米 ， 高 0.2 米 ． 给 这些 台阶 铺上 地毯 ， 至少 需要 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "11287", "content": "水 结成 冰 ， 体积 增加 了 10% ． 现有 一块 冰 ， 体积 是 5500 立方分米 ， 融化 成 水 后 的 体积 = 多少 立方分米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8694", "content": "把 4 千克 桃子 平均 分给 5 只 小猴子 ， 每 只 小 猴 分 到 了 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18081", "content": "修 一条 路 ， 前 3 天 修 39.6 千米 ． 按 这样 的 速度 又 修 了 118.8 千米 ， 修 完 这 条 路 一 共用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17816", "content": "有 6 名 运动员 要 进行 乒乓球 比赛 ， 如果 每 2 名 运动员 之间 都 要 进行 一场 比赛 ， 一共 要 进行 多少 场 比赛 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9690", "content": "如果 a 是 b 的 (1/3) ， 那么 b 就是 a 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "673", "content": "小 明 的 爸爸 每月 工资 是 1800 元 ， 如果 按 超过 1600 元 部分 需要 缴纳 5% 的 个人所得税 的 规定 交税 ， 那么 小 明 的 爸爸 每月 交税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6598", "content": "一 个 工程队 要 修 一条 长 4.8 千米 的 公路 ， 前 4 天 已修 0.48 千米 ， 照 这样 计算 ， 还要 多少 天 才能 完成 任务 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16093", "content": "小张 叔叔 5 月份 工资 是 1450 元 ， 另外 奖金 900 元 ． 工资 和 奖金 总和 扣除 1600 元 后 ， 所剩 部分 按 个人 调节税 20% 缴税 ， 你 能 帮 小张 叔叔 算算 ， 他 应 交纳 多少 元 税 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14859", "content": "商店 运 来 苹果 和 桔子 共 440 千克 ， 卖 了 苹果 重量 的 (1/3) 后 ， 剩下 的 苹果 和 运 来 的 桔子 的 重量 恰好 相等 ， 商店 运 来 桔子 的 重量 = 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1048", "content": "配制 某种 药水 ， 药 与 水 的 比 为 1 ： 6 ， 140 克 这种 药水 中 含 药 多少 克 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5494", "content": "叮当 童装 厂 做 童装 ， 第一批 做 了 48 套 ， 第 二 批 做 的 套数 是 第一批 的 1.5 倍 ， 一 共用 去 216 米 布 ， 每套 童装 用布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22094", "content": "学校 举行 春季 运动会 ， 5 （ 2 ） 班 (1/4) 的 同学 参加 跑步 ， (1/8) 的 同学 参加 跳高 ， (1/5) 的 同学 参加 游泳 ， 其余 的 当 拉拉队 队员 ． 有 几分 之 几 的 同学 当 拉拉队 队员 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8124", "content": "一 根 竹竿 长 5 米 ， 把 它 插入 水中 ， 露出 水面 部分 是 (8/3) 米 ， 在 水中 部分 是 2.25 米 ． 插入 水池 中 泥土 部分 长 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14982", "content": "南湖公园 城 共有 24 栋 楼房 ， 毎 栋 106 户 人家 ， 这个 住宅小区 共有 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4353", "content": "一 瓶 可乐 400 升 ， 喝 了 其中 的 25% ， 又 喝 了 余下 的 60% ， 还 剩下 多少 升 可乐 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20933", "content": "一 堆 货物 ， 运走 (4/7) ， 正好 是 (12/5) 吨 ， 这 堆 货物 有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3599", "content": "裁缝 有 一段 16 米 长 的 料子 ， 每天 减去 2 米 ， 第 多少 天 剪 完 剩下 的 最后 一段 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6702", "content": "王 伯伯 带 700 元 买 大米 ． 买 了 16 袋 大米 ， 剩 60 元 ． 每 袋 大米 的 价钱 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2992", "content": "服装厂 第一 车间 生产 服装 489 件 ， 第 二 车间 生产 服装 474 件 ， 每 9 件 装 一箱 ， 两 车间 生产 的 服装 一共 可以 装 多少 箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21892", "content": "一 条 水渠 全长 5312 米 ． 已经 修 了 8 天 ， 还 剩 456 米 没 修 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2574", "content": "小 华 从 家 到 商场 有 2 条 路线 ， 从 商场 到 公园 有 3 条 路线 ， 那么 小 华 从 家 到 公园 一共 有 多少 条 路线 可以 走 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6850", "content": "一 个 练习本 0.8 元 钱 ， 小 东 拿 2 元 钱 买 两个 练习本 ， 还 剩 多少 元 钱 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6781", "content": "学校 合唱队 由 4 、 5 、 六年级 学生 组成 ． 其中 四年级 占 总 人数 的 (1/4) ， 六年级 占 总 人数 的 (2/5) ． 五年级 占 总 人数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11586", "content": "一 辆 自行车 ， 原价 300 元 ， 现 打 0.8 出售 ． 现在 买 这辆 车 要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17208", "content": "一 个 长方形 的 池塘 长 100 米 ， 宽 40 米 ， 在 池边 每隔 2 米 种 一棵树 ， 一共 需要 种 多少 棵 树 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11916", "content": "某 农场 有 山羊 280 只 ， 是 绵羊 只 数 的 (4/7) ． 绵羊 有 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21361", "content": "一 艘 轮船 4 小时 航行 108 千米 ， 照 这样 计算 ， 继续 航行 了 270 千米 ， 一共 航行 了 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16796", "content": "一 块 布 长 2 米 ， 用 去 (2/3) 米 ． 还 剩 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19289", "content": "小 明 的 钱 正好 可以 买 5 支 单价 为 12 元 的 钢笔 ． 如果 买 水笔 ， 可以 买 6 支 ， 水笔 每支 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15125", "content": "学校 舞蹈队 有 男生 20 人 ， 如果 女生 人数 减少 (1/5) ， 就 和 男生 人数 相等 ． 学校 舞蹈队 有 女生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13899", "content": "3.4 与 7.15 的 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20612", "content": "师徒 两 人 要 作 294 个 零件 ， 师傅 每 小时 做 36 个 ， 徒弟 每 小时 做 24 个 ． 师傅 做 54 个 后 ， 师徒 合作 还要 多少 时间 才能 完成 任务 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16328", "content": "小 刚 看 一本 130 页 的 故事书 ， 已经 看 了 30 页 ， 剩下 的 书 他 想 在 5 天 内 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11554", "content": "为了 迎国庆 ， 白玉兰 学校 共 买 了 968 张 彩色 折纸 ， 如果 平分 给 8 个 班级 ， 每个 班级 能 分 到 多少 张 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12283", "content": "小 芳 有 36 张 邮票 ， 小 华 的 邮票 张 数 比 小 芳 多 (1/3) ， 小 华 比 小 芳 多 多少 张 邮票 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11488", "content": "布袋 里 有 4 种 不同 颜色 的 球 ， 每种 都 有 10 个 ． 最少 取出 多少 个 球 ， 才能 保证 其中 一定 有 3 个 球 的 颜色 一样 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20811", "content": "某 玩具厂 生产 一批 玩具 ， 上 半月 完成 计划 的 (3/5) 下半月 完 计划 的 (5/8) 这个 玩具厂 全 月 超额完成 计划 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7235", "content": "科幻 书 每 本 32 元 ， 科幻 书 比 故事书 的 3 倍 还 少 1 元 ， 故事书 每 本 几元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7636", "content": "假日 实践 活动 小队 共有 2 队 ， 每队 6 人 ， 在 一次 植树 活动 中 ， 他们 每人 植树 14 棵 ， 这个 小队 共 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2865", "content": "一 块 地 728 平方米 ， 其中 (1/8) 种 番茄 ， (1/2) 种 白菜 ， 其余 的 种 南瓜 ， 种 南瓜 的 面积 = 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4536", "content": "池塘 里 的 水草 每天 长大 一倍 ， 16 天 长满 ， 多少 天 长满 半个 池塘 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5320", "content": "甲 、 乙 两辆 汽车 同时 从 两地 出发 ， 相向 而 行 ， 甲 车 的 速度 是 85 千米 / 时 ， 乙 车 的 速度 是 110 千米 / 时 ， 经过 4 小时 两车 在 途中 相遇 ． 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9509", "content": "春节 前 ， 妈妈 要 给 奶奶 寄 3000 元 钱 ， 邮局 要 收取 1% 的 手续费 ， 那么 妈妈 出门 至少 要 带上 多少 元 现金 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9063", "content": "有 一根 木料 长 20 米 ， 先 锯下 2 米 长 的 损坏 部分 ， 然后 把 剩下 的 木料 锯 成 一样 长 的 木条 ， 又 锯 了 5 次 ， 每 根 短 木条 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10262", "content": "一 种 空调器 现在 售价 是 2170 元 ， 比 原来 降低 了 (1/8) ， 这种 空调器 原来 售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16074", "content": "甲 数 的 (2/3) 与 乙 数 的 (4/5) 相等 ， 甲 数 是 30 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7829", "content": "3.2 与 0.8 的 积 再 乘以 1.2 ， 结果 = ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20763", "content": "商店 卖出 15 台 电视机 ， 7 台 洗衣机 ． 卖出 的 电视机 的 台数 是 洗衣机 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2987", "content": "一 个 锅 每次 只能 放 两片 面包 ， 每片 面包 第一面 要 考 2 分钟 ， 第 二 面 要 烤 1 分钟 ． 小 红 早点 要 吃 3 片 面包 ， 至少 要 等 多少 分钟 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8731", "content": "武汉长江大桥 大约 长 1600 米 ， 相当于 黄埔 大桥 的 (2/9) ． 黄埔 大桥 长 大约 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11311", "content": "每 12 支 铅笔 装 一盒 ， 每 20 盒 铅笔 装 一箱 ， 现 要 装 4 箱 ， 需要 多少 支 铅笔 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16994", "content": "一 个数 的 (5/8) 是 (1/2) ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8932", "content": "体育 用品商店 有 38 个 篮球 ， 排球 的 个数 是 篮球 的 4 倍 ， 足球 比 排球 、 篮球 的 总数 少 62 个 ， 足球 有 多少 个 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4770", "content": "校园 里 有 柳树 60 棵 ， 杨树 的 棵 数 是 柳树 的 (2/3) ， 又 是 槐树 的 (4/5) ． 校园 里 有 槐树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4216", "content": "南京 铁路 队 要 修 一段 铁路 ， 已经 修好 了 4.05 千米 ， 剩下 的 比 修好 的 少 2.45 千米 ． 这 段 铁路 全长 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19089", "content": "一 次 体育比赛 结束 时 ， 7 名 获奖 运动员 想到 握手 ， 如果 每 2 人 握 一次 手 ， 共 握 几次 手 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3389", "content": "小 静 看 一本 194 页 的 数学 故事书 ， 前 4 天 平均 每天 看 35 页 ． 剩下 的 打算 用 3 天 看 完 ， 平均 每天 还要 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15299", "content": "一 本 科技 书 原来 的 售价 是 80 元 ， 现在 降价 了 (1/8) ， 现在 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19818", "content": "工人 叔叔 修 机器 ， 第一天 修 了 4 台 ， 第 二 天 修 了 6 台 ， 第 3 天 上午 修 了 3 台 ， 下午 修 了 2 台 ． 平均 每天 修 了 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21609", "content": "一 个 平行四边形 的 两条 邻边 分别 是 4 厘米 和 6 厘米 ， 其中 一组 对 边 的 距离 是 4.5 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12395", "content": "小 红 的 母亲 月工资 是 2000 元 ． 按 个人所得税 的 规定 ， 超过 1600 元 的 部分 （ 500 元 以内 ） ， 按 5% 的 比例 缴纳 个人所得税 ． 小 红 的 母亲 实际 领到 的 工资 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17554", "content": "一 个 长方体 的 宽 是 20 厘米 ， 宽 是 长 的 (2/3) ， 长 是 高 的 (5/6) ， 它 的 高 = 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18506", "content": "果园 里 有 桃树 48 棵 ， 梨树 的 棵 数 是 桃树 的 3 倍 ， 苹果树 的 棵 数 是 梨树 棵 数 的 2 倍 ， 苹果树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14717", "content": "真真 面粉厂 上午 加工 面粉 2400 千克 ， 下午 加工 面粉 2250 千克 ． 每 25 千克 面粉 装 一袋 ， 下午 比 上午 少 加工 多少 袋 面粉 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11217", "content": "一 辆 汽车 以 每 小时 90 千米 的 速度 从 甲地 开往 乙地 ， 2 小时 后 ， 还 剩下 全程 的 (3/8) ． 甲 、 乙 两地 间 的 距离 = 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22083", "content": "红星 制衣厂 5 月份 计划 制衣 1500 件 ， 上 半月 完成 了 计划 的 (2/3) ， 下半月 完成 计划 的 50% ， 实际 超产 了 多少 件 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11788", "content": "甲乙 两辆 汽车 分别 从 a 、 b 两个 城市 同时 出 ， 沿 这 两个 城市 的 高速公路 相对 而 行 ， 甲 车 每 小时 行 110 千米 ， 乙 车 每 小时 行 100 千米 ， 经过 3 小时 两车 相遇 ． 这 两个 城市 间 的 高速公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20766", "content": "建筑工地 有 15 吨 黄沙 ， 第一次 用 去 了 它 的 (2/5) ， 第 二 次 用 去 了 (1/5) 吨 ， 两次 一 共用 去 了 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8867", "content": "某 电器 商场 今年 销售 了 2250 台 电脑 ， 今年 的 销售量 比 去年 增加 了 (1/4) ， 去年 销售 了 多少 台 电脑 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13895", "content": "李 民 要 用 “ 高乐高 ” 冲 一杯 220 克 的 巧克力 ， 根据 产品 的 建议 ， 高乐高 与 牛奶 质量 的 比 是 1 ： 10 ， 她 需要 放 多少 克 的 高乐高 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8638", "content": "3 块 月饼 ， 平均 分给 4 个人 ， 每人 分 得 多少 块 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "639", "content": "奶奶 今年 65 岁 ， 妈妈 的 年龄 是 奶奶 的 (3/5) ， 小 红 的 年龄 是 妈妈 的 (1/3) ． 小 红 今年 多少岁 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15521", "content": "王明 去 超市 买 了 一瓶 墨汁 0.55 元 ， 买 了 一个 大字 本 0.7 元 ， 付 了 2 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8952", "content": "一 辆 汽车 以 每 小时 45 千米 的 速度 从 甲地 到 乙地 ， 3 小时 行 了 全程 的 (5/7) ， 这辆 汽车 还要 行 多少 千米 才能 到达 乙地 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6148", "content": "商场 以 每个 3.2 元 的 价格 购进 了 一批 文具盒 ， 每个 售价 5 元 ， 还 剩下 80 个 没 售出 时 ， 已 售出 的 获利 648 元 ． 问 这 批 文具盒 一共 有 多少 个 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15997", "content": "47 与 37 的 和 除以 它们 的 差 ， 商 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2989", "content": "某 乡 去年 造林 15 公顷 ， 今年 造林 18 公顷 ， 今年 比 去年 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18198", "content": "50 l 的 牛奶 分装 在 容积 为 (1/2) l 的 小 盒内 出售 可以 装 多少 盒 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "587", "content": "一 本 故事书 每天 看 16 页 ， 看 了 5 天 ， 还 剩 9 页 ， 这本 故事书 共 多少 页 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20633", "content": "一 个 两位数 同时 是 2 、 3 、 5 的 倍数 ， 这个 两位数 最小 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9568", "content": "一 本 书稿 ， 原 计划 共印 540 页 ， 每页 24 行 ， 每行 26 个 字 ． 现在 又 改为 每页 30 行 ， 这本 书稿 比 原 计划 减少 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13194", "content": "小 红 买 了 练习本 和 生字 本 各 3 本 ， 一本 练习本 0.36 元 ， 一本 生字 本 0.32 元 ， 小 红 买 生字 本 比 买 练习本 少 用 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22920", "content": "一 桶 油 连 桶 共 重 16.5 千克 ， 倒 出 油 的 (1/3) 后 ， 连 桶 共 重 11.5 千克 ， 油桶 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11241", "content": "书架上 有 两层 书 ， 第一层 比 全部 的 (3/5) 多 90 本 ， 第 二 层 是 全部 的 (1/3) ． 书架上 共有 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20074", "content": "甲 步行 每分钟 行 80 米 ， 乙 骑 自行车 每分钟 200 米 ， 二 人 同时 同 地 相 背 而 行 3 分钟 后 ， 乙 立即 调头 来 追 甲 ， 再 经过 多少 分钟 乙 可 追 上 甲 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12097", "content": "一 个 布袋 里 装有 红 、 黄 、 蓝 3 种颜色 的 袜子 各 7 只 ， 一次 至少 取出 多少 只 ， 才能 保证 每种 颜色 的 袜子 至少 有 一只 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22595", "content": "78 + 130 与 15 的 积 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3674", "content": "甲乙 两 人 同时 、 同 地 出发 去 同一 目的地 ． 甲 每 分行 65 米 ， 乙 每 分行 75 米 ． 途中 乙 休息 了 10 分钟 ， 结果 乙 比 甲 迟到 2 分 到 目的地 ． 求 两地 相距 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5666", "content": "修 一段 690 米 长 的 公路 ， 已经 修 了 150 米 ． 剩下 的 准备 3 天 修 完 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9256", "content": "某 款 书包 0.8 优惠 售价 是 120 元 ， 如果 按 0.75 出售 ， 买 这 款 书包 需要 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18429", "content": "育英 小学 合唱队 有 120 人 ， 篮球队 的 人数 是 合唱队 的 (2/5) ， 舞蹈队 的 人数 是 篮球队 的 (7/8) ． 舞蹈队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22659", "content": "王 刚 从 家 到 学校 每 小时 步行 3.5 千米 ， 1.6 小时 到达 ， 从 学校 返回 时 ， 每 小时 行 4 千米 ， 王 刚 返回 家 要 多少 小时 才能 到达 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1280", "content": "春节 期间 ， 书法 小队 的 小 红 和 王 强 准备 写 一些 大 ‘ 福 ’ 字 春联 免费 赠送给 各家 ， 当 小 红 写 完 40% 时 ， 李老师 对 王 强 说 ： “ 如果 你 写 105 张 ‘ 福 ’ 字 的话 ， 就 超出 任务 的 (1/10) ” 聪明 的 你 能 算 出 他们 两 人 共 要 写 多少 张大 ‘ 福 ’ 字 ？ ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11576", "content": "一 辆 汽车 的 速度 是 60 千米 / 时 ， 15 小时 行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16174", "content": "把 一根 粗细 均匀 的 钢管 锯 成 两段 ， 一段 长 4 米 ， 重 33.2 千克 ， 另 一段 长 3 米 ， 这 两段 钢管 共 重 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15809", "content": "把 3200 克 盐分 装 在 4 个 □ 袋 里 ， 平均 每 袋 有 多少 克 盐 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7143", "content": "一 袋 大米 ， 吃 了 (2/5) ， 还 剩下 12 千克 ． 这 袋 大米 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17394", "content": "学校 要 添置 40 套 课桌凳 ， 凳子 每 条 25 元 ， 桌子 的 单价 100 元 ， 学校 买 这些 课桌椅 共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14996", "content": "一 个数 的 25% 是 80 ， 这个 数 的 55% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2593", "content": "把 浓度 为 95% 的 酒精 150 千克 稀释 为 75% 的 酒精 ， 需 加水 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4934", "content": "自行车 的 时速 是 12 千米 / 时 ， 摩托车 的 时速 是 32 千米 / 时 ． 自行车 的 速度 是 摩托车 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17363", "content": "甲 数 是 60 ， 乙 数 比 甲 数 少 20% ， 乙 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14264", "content": "张师傅 做 一批 零件 ， 计划 每 小时 做 40 个 ， 15 小时 做 完 ． 实际 每 小时 多 做 10 个 ， 实际 多少 小时 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4026", "content": "蔬菜 公司 运 来 1350 千克 白菜 和 4200 千克 萝 ． 把 这些 菜 平均 放在 3 个 冷库 中 ， 每个 冷库 里 放 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15887", "content": "修 一条 路 ， 甲队 要 4 天 修 完 ， 乙 队 要 8 天 修 完 ， 甲 所用 的 时间 是 乙 的 多少 （ 分数 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2143", "content": "一 副 手套 7 元 ， 一双 运动鞋 77 元 ， 一双 运动鞋 的 价钱 是 一副 手套 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14604", "content": "甲班 有 51 人 ， 乙班 有 49 人 ， 某次 考试 两班 平均 成绩 是 81 分 ， 乙班 平均 成绩 比 甲班 平均 成绩 高 7 分 ， 那么 ， 乙班 平均 成绩 = 多少 分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "5968", "content": "小 骞 同学 看 一本 《 儿童文学 》 ， 第一天 看 了 它 的 (1/5) ， 第 二 天 看 了 25 页 ， 这时 正好 看 了 这 本书 的 (9/20) ． 这本 《 儿童文学 》 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1725", "content": "实验 小学 有 学生 1752 名 ， 实验 中学 的 学生 数 比 实验 小学 的 学生 数 的 2 倍 少 305 名 ， 实验 中学 有 学生 多少 名 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18183", "content": "一 台 彩电 ， 原价 2496 元 ， 现在 价格比 原来 降低 了 (1/8) ， 现在 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13203", "content": "明明 班 有 25 名 女生 ， 20 名 男生 ． 任意 挑选 一 人 ， 选 到 明明 的 可能性 是 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11979", "content": "有 一块 棱 长 40 厘米 的 正方体 钢材 ， 将 它 锻造 成 高 和 宽 都 是 20 厘米 的 长方体 钢材 ， 锻造 成 的 钢材 长 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5739", "content": "张 大爷 把 2000 元 存入 银行 ， 定期 2 年 ， 年利率 是 2.25% ， 到期 需 支付 20% 的 利息税 ， 求 到期 后 张 大爷 可以 拿到 税后 利息 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "2966", "content": "一 本 故事书 ， 小 文 已经 看 了 全书 的 (3/5) ， 还 剩下 全书 的 多少 没有 看 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21240", "content": "汽车 上山 的 速度 为 每 小时 54 千米 ， 行 了 5 小时 到达 山顶 ， 下山 时 按 原 路 返回 只用 了 4 小时 ． 汽车 下山 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16569", "content": "某 杀虫剂 和 水 混合 配成 杀虫药 水 ， 杀虫剂 与 水 的 比值 是 (1/150) ． 现有 4 千克 杀虫剂 ， 需要 用 多少 千克 水 混合 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7409", "content": "桶 中原 有 80 斤 油 ， 后 又 加进 240 斤 油 ． 现在 桶 中 的 油 的 重量 是 原来 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14047", "content": "一 种 喷洒 果树 的 药水 ， 农药 和 水 的 比 是 1 ： 200 ． 现有 10 千克 农药 ， 能 配制 多少 千克 药水 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6686", "content": "把 1 升 果汁 先 倒 满 3 小瓶 ， 每 小瓶 (1/4) 升 ． 剩下 的 平均 倒 进 2 个 杯 里 ． 每个 杯 里 倒 进 果汁 多少 升 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8037", "content": "54.6 - 31.4 的 差 ， 加上 6 / 96 的 商 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8563", "content": "30 - 3.9 * 5 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3764", "content": "有 一项 工程 要 铺设 一条 电缆线 ， 第一周 铺 了 全长 的 (1/4) ， 第 二 周 铺 了 全长 的 (1/5) ， 还 剩 180 千米 没有 铺 ， 这 条 电缆线 全长 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7522", "content": "妈妈 买 了 5 千克 的 大米 ， 每千克 2.38 元 ； 买 了 6.5 千克 面粉 ， 每千克 3.10 元 ． 妈妈 买 大米 和 面粉 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22767", "content": "卷烟厂 上 月 香烟 的 销售额 为 1500 万元 ． 如果 按 销售额 的 45% 缴纳 消费税 ． 上 月 应 缴纳 消费税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2695", "content": "一 块 长方形 铁皮 的 长 是 3 米 ， 宽 是 2 米 ， 它 的 周长 = 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12379", "content": "一 列 火车 32 小时 共 行 1504 千米 ． 已知 这 列 火车 先 以 每 小时 50 千米 的 速度 行驶 11 小时 ， 又 以 每 小时 42 千米 的 速度 行驶 9 小时 ， 求 在 其余 时间 内 的 平均速度 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "6210", "content": "多少 除 768 的 商 是 24 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7971", "content": "粮食 一批 ， 可 供 25 名 院 童 20 日 食用 ； 8 天 后 ， 院 童 人数 多 了 5 人 ， 问 还 可 支持 多少 天 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.9, "length": 21}
-{"question_id": "16815", "content": "草地 上 有 绵羊 42 只 ， 正好 是 山羊 的 (3/7) 少 6 只 ， 山羊 有 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7160", "content": "粮店 出售 一批 大豆 ， 第一天 卖 了 (1/4) ， 第 二 天 卖 了 230 千克 ， 两天 共 卖出 大豆 480 千克 ， 这 批 大豆 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3827", "content": "我们 的 祖先 早 在 公元前 700 多年 就 发明 了 用水 漏计 时 的 方法 ， 科技 小组 的 同学 也 尝试 做 了 一个 长方体 水 漏 计时器 ， 这个 计时器 长 4 dm ， 宽 2 dm ， 高 3 dm ， 全部 漏 完 要 8 小时 ． 某 天 中午 12 时 ， 同学 们 往 水 漏 计时器 里加 满 了 水 ， 下午 5 时 放学 时 ， 水 漏 计时器 里 大约 还有 多少 升水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14788", "content": "电脑公司 要 420 台 电脑 ， 已经 装 20 台 ， 剩下 的 每天 装配 25 台 ， 还要 几天 才能 装完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21992", "content": "把 一根 10 米 长 的 绳子 平均 分成 5 份 ， 每 段 是 这根 绳子 的   ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19415", "content": "一 辆 旅游车 在 平原 和 山区 个 行驶 2 小时 ， 在 平原 一 小时 行驶 50 千米 ， 在 山区 一 小时 行驶 30 千米 ， 最后 到达 山顶 ， 这 段 路程 大约 有 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4113", "content": "一 项 工程 ， 甲 单独 做 (1/6) 小时 完成 ， 乙 单独 做 (1/7) 小时 完成 ， 如果 甲乙 合 做 ， 多少 小时 能 完成 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20969", "content": "小 亮 练习 投篮 160 次 ， 命中率 是 60% ， 他 有 多少 次 命中 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21926", "content": "学校 手工 组 做 了 60 多 蓝花 ， 是 做 的 红花 的 (3/5) ， 做 的 红花 是 黄花 的 (5/6) ． 做 黄花 多少 朵 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3002", "content": "学校 阅览室 里 有 36 名 学生 在 看书 ， 其中 女生 占 (4/9) ， 后来 又 有 几名 女生 来看 书 ， 这时 女生 人数 占 所有 看书 人数 的 (9/19) ， 问 后来 又 有 多少 名 女生 来看 书 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "21164", "content": "学校 买来 315 本 科普读物 ， 按 3 ： 4 的 比 借给 5 、 六年级 的 同学 ， 那么 五年级 比 六年级 少 借 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20052", "content": "某 工厂 有 职工 616 人 ， 其中 男 职工 占 (4/7) ， 这个 工厂 女职工 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13795", "content": "六年级 共有 180 名 学生 ， 其中 男生 占 (3/5) ， 六年级 有 女生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5203", "content": "如今 国家 正在 实行 “ 电器 下乡 ” ， 政府 对 农民 购买 家电产品 时 按 产品 销售价 的 13% 进行 财政补贴 的 优惠政策 ， 张 大爷 享受 了 这 一 政策 买 了 一台 空调 ， 从 政府 获得 补贴 195 元 ， 请问 这 台 空调 的 销售价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20500", "content": "比 65 多 35 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19313", "content": "小 玲 看 一本 故事书 ， 每 小时 可以 看 12 页 ， 看 了 6 小时 ， 还 剩下 10 页 没 看 ． 这 本书 共有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22241", "content": "商店 有 苹果 84 千克 ， 它 的 (3/4) 正好 是 香蕉 的 重量 ； 香蕉 又 是 水果 总数 (3/40) 的 ． 一共 有 水果 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22056", "content": "5 / 515 的 商 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5677", "content": "妈妈 今年 40 岁 ， 儿子 的 年龄 是 妈妈 的 (2/5) ， 又 正好 是 外婆 年龄 的 (1/4) ． 外婆 今年 几岁 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21830", "content": "一 个 小数 ， 先 扩大 100 倍 ， 再 缩小 1000 倍 后 是 0.82 ， 原来 的 小数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20399", "content": "要 收割 420 亩 小麦 ， 开始 的 4 小时 割 了 240 亩 ， 照 这样 ， 再 用 多少 小时 可 收割 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19859", "content": "有 一个 车间 ， 今年 7 月 调 走 (2/9) 的 工人 后 ， 又 招进 12 位 工人 ， 正好 与 原有 的 工人 数 相等 ， 这个 车间 原来 有 多少 位 工人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13563", "content": "某 运输 公司 在 一个 星期 里 ， 前 3 天 平均 每天 运 货物 1977 吨 ， 后 4 天 平均 每天 运 货物 1970 吨 ． 这 一 星期 平均 每天 运 货物 多少 吨 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7129", "content": "一 套 衣服 105 元 ， 买 8 套 这样 的 衣服 要 多少 元 钱 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5423", "content": "果园 里 种 了 218 棵 梨树 ， 苹果树 是 梨树 的 12 倍 ， 苹果树 比 梨树 多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13507", "content": "甲 、 乙 两筐 水果 重量 相等 ， 如果 从 甲 筐 取出 4 千克 水果 放入 乙 筐 ， 这时 ， 甲 筐 比 乙 筐 少 (1/4) ， 甲 筐 原有 水果 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15668", "content": "乐乐 将 20 克 的 糖 放入 180 克 的 水中 ， 溶解 后 她 喝 了 这 杯 糖水 的 (1/4) ， 她 喝掉 了 多少 克 的 糖水 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14637", "content": "一 本书 现价 6 元 比 原价 降价 2 元 ， 售价 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9844", "content": "民众 电影院 的 楼上 有 200 个 座位 ， 正好 是 楼下 座位 的 (1/5) ， 在 电影院 楼下 有 多少 个 座位 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11649", "content": "栽 杨树 480 课 ， 比 柳树 多 (2/3) ， 栽 柳树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13273", "content": "小 明 要 打 一篇 文章 ， 第一天 打 了 全篇文章 的 (1/3) ， 第 二 天 打 了 全篇文章 的 (2/7) ， 两天 共 打 143 个 字 ， 问 这 篇文章 共有 多少 个 字 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22482", "content": "某 商品 按 定价 出售 ， 每件 可 获得 利润 50 元 ． 如果 按 定价 的 80% 出售 10 件 ， 与 按 定价 每件 减少 30 元 出售 12 件 所 获得 的 利润 相同 ， 那么 ， 这种 商品 每件 定价 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7581", "content": "一 套 运动服 打 0.75 之后 是 360 元 ， 那么 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11147", "content": "一 袋 面粉 ， 第一次 用 去 全部 的 (1/5) ， 第 二 次 用 去 全部 的 (1/4) ， 两次 共用 27 千克 ， 这 袋 面粉 重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8556", "content": "3 千克 芝麻 可 榨油 (4/5) 千克 ， 榨 1 千克 油 要 用 多少 千克 芝麻 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14844", "content": "自行车 制造厂 如果 每天 生产 自行车 180 辆 ， 10 天 完成 ， 如果 每天 比 原 计划 多 生产 20 辆 ， 几天 可以 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22084", "content": "一 个 足球 比 一个 排球 贵 5% ， 买 一个 排球 花 48 元 ， 买 一个 足球 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21373", "content": "第一 小组 种 了 10 棵 树 ， 其中 ， 红红 种 了 3 棵 ， 明明 种 了 4 棵 ． 红红 和 明明 一共 种 了 这些 树 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21309", "content": "瑞星 2007 版 杀毒软件 打 0.75 销售 后 ， 现价 是 24 元 ， 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19117", "content": "水果店 有 300 千克 香蕉 ， 比 桔子 多 20% ， 水果 店里 有 桔子 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13644", "content": "8.6 的 7 倍 + 95 / 50 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1331", "content": "在 含盐 10% 的 盐水 100 克 中 ， 再 加入 20 克 盐 ， 得到 的 盐水 含盐 的 百分比 为 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16170", "content": "练一练 ： 两列 火车 同时 从 相距 540 千米 的 甲乙 两地 相向 而 行 ， 经过 3.6 小时 相遇 ． 已知 客车 每 小时 行 80 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12360", "content": "一 个数 的 25% 与 36 的 (1/2) 相等 ． 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22267", "content": "李老师 买 书 用 去 76.8 元 ， 买 5 千克 苹果 共用 去 12 元 ， 她 带 了 100 元 ， 还 剩下 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17562", "content": "一 种 商品 0.8 优惠 是 150 元 ， 0.7 优惠 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7698", "content": "一 辆 汽车轮胎 的 外 直径 是 1 米 ， 每分钟 转 200 周 ， 这辆 汽车 经过 一座 长 3140 米 的 跨 江 大桥 ， 需要 多少 分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16350", "content": "玩具厂 生产 一种 玩具 ， 原来 的 成本 是 108 元 ， 现在 比 原来 降低 了 (1/6) ， 现在 的 成本 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13268", "content": "学校 体育 室 买来 排球 28 只 ， 相当于 足球 只 数 的 (7/9) ． 买来 足球 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7367", "content": "一 件 商品 原价 250 元 ， 现在 打 0.75 出售 ， 现在 买 这件 商品 ， 比 原来 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2040", "content": "若 某次 数学考试 标准 成绩 定为 85 分 ， 规定 高于 标准 记 为 正 ， 某位 学生 的 成绩 记 作 ： - 3 分 ， 则 这 名 学生 的 实际 得 分为 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "5676", "content": "15 个 209 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14125", "content": "张 叔叔 的 一项 创造发明 得到 了 5000 元 的 科技 成果奖 ， 按规定 应 缴纳 20% 的 个人所得税 ． 张 叔叔 实际 得到 奖金 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21167", "content": "某校 6 （ 1 ） 班 有 男生 25 人 ， 女生 26 人 ， 男生 人数 相当于 总 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5535", "content": "苹果 每千克 2.6 元 ， 香蕉 每千克 5.2 元 ， 妈妈 买 了 6 千克 苹果 和 4 千克 香蕉 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8355", "content": "乌兰 看 了 一 本书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 全书 的 (1/4) ， 第 3 天 看 25 页 就 看 完 了 这 本书 ． 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9694", "content": "客车 以 每 小时 60 千米 的 速度 从 甲地 开往 乙地 ， 同时 一辆 货车 从 乙地 开往 甲地 ， 每 小时 比 客车 少 行 12 千米 ， 经过 5 小时 两车 在 途中 相遇 ， 甲 、 乙 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13230", "content": "服装厂 原 计划 20 天 加工 360 套 服装 ． 结果 提前 5 天 完成 任务 ， 实际 平均 每天 比 计划 多 加工 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21677", "content": "果园 里 梨树 有 208 棵 ， 苹果树 比 梨树 的 3 倍 少 16 棵 ， 苹果树 与 梨树 共有 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19199", "content": "在 每年 “ 创建 绿色 社区 ” 的 进程 中 ， 都 会 举行 一个 大型 的 花车 巡游 活动 ． 一列 彩车 由 25 辆车 组成 ， 每辆车 长 8 米 ， 前后 两车 相隔 10 米 ， 这 列 彩车 车队 共 长 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "14896", "content": "一 个数 的 (3/8) 是 45 ， 这个 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18200", "content": "科学 老师 将 10 克 盐 溶解 到 100 克 水中 ， 制成 盐水 ． 盐 占 盐水 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3307", "content": "王 村 修 一条 水渠 ， 第一天 修 8.5 km ， 第 二 天 比 第一天 多 修 3.5 km ， 这时 修 完 的 比 没 修 的 少 4 km ， 求 还有 多少 千米 没 修 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "23013", "content": "一 条 裤子 的 价格 是 75 元 ， 是 一条 上衣 的 (2/3) ． 一套 衣服 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4045", "content": "一 架飞机 每 小时 飞行 560 千米 ， 一辆 汽车 每 小时 行驶 70 千米 ， 这辆 汽车 行驶 16 小时 的 路程 ， 飞机 只 需 飞行 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10497", "content": "学校 买 了 245 套 桌椅 ， 一张 桌子 68 元 ， 一把 椅子 32 元 ， 共 花 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15173", "content": "我们 班 有 45 名 学生 ， 其中 女生 占 (3/5) ， 女生 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "297", "content": "一 个数 的 (6/7) 比 2.5 的 (4/5) 多 10 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14702", "content": "一 个 长方体 的 游泳池 ， 长 60 米 ， 宽 40 米 ， 深 2 米 ， 现在 要 在 4 壁 和 底面 抹 一层 水泥 ， 抹 水泥 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.7, "length": 17}
-{"question_id": "7215", "content": "王 阿姨 昨天 卖出 45 套 明信片 ， 每套 明信片 12 张 ， 每张 3 元 ， 这些 明信片 一共 卖 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5608", "content": "一 本书 ， 小强 已经 看 了 240 页 ， 还 剩 (3/5) 没有 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11098", "content": "甲 、 乙 两 数 的 和 是 7.16 ， 甲 数 是 3.28 ， 乙 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20634", "content": "一 个 最 简分数 的 分子 扩大 4 倍 ， 分母 缩小 3 倍 后 正好 等于 10 ， 那么 这个 最 简分数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4044", "content": "为 支援灾区 ， 某县 实验 小学 开展 捐书 活动 ． 四年级 捐 了 150 本 ， 五年级 比 四年级 多 捐 了 60 本 ， 六年级 捐 的 本 数 是 五年级 的 3 倍 ， 六年级 捐 了 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5751", "content": "春节 快 到 了 ， 某 超市 购进 380 个 小 灯笼 只 小 中国 节 ， 比 购进 的 大 灯笼 的 3 倍 多 20 个 ， 超市 购进 多少 个 大 灯笼 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10295", "content": "商店 进来 36 辆 自行车 ， 第一周 卖出 总数 的 (1/4) ， 第 二 周 卖出 总数 的 (1/9) ， 两周 共 卖出 自行车 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17555", "content": "甲 、 乙 两队 合 做 一批 零件 ， 甲队 做 了 全部 的 (2/5) ， 乙 队 比 甲队 多 做 了 全部 零件 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15462", "content": "客车 和 货车 分别 从 甲 、 乙 两地 同 进 相向 开出 ， 行 了 6 小时 ， 客车 距离 乙地 还有 (1/8) 的 路程 ， 货车 距离 甲地 138 千米 ． 已知 客车 每 小时 比 货车 多行 了 15 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21161", "content": "某 数 的 (1/2) 比 这个 数 的 (2/3) 少 19 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22717", "content": "一 次 考试 中 ， 五年级 有 114 人 及格 ， 及格率 为 95% ， 五年级 一共 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21951", "content": "一 根 铁丝 ， 第一次 用 去 全长 的 (3/10) ， 第 二 次 用 去 的 比 第一次 多 3 米 ， 第 3 次 用 去 全长 的 20% ， 正好 用 完 ， 这根 铁丝 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17087", "content": "计算 ： 1002 - 992 + 982 - 972 + 962 - 952 + 942 - 932 + 922 - 912 = ．", "knowledge": ["+", "-"], "difficulty": 0.8, "length": 19}
-{"question_id": "3222", "content": "小 华 和 爷爷 的 年龄 比 是 1 ： 6 ， 已知 爷爷 比 小 华大 50 岁 ， 小 华 和 爷爷 的 年龄 和 = 多少岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12725", "content": "红糖 的 (3/4) 与 白糖 的 (1/3) 相等 ， 已知 白糖 有 36 千克 ， 红糖 有 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1806", "content": "人体 中 的 血液 在 动脉 中 的 速度 是 每秒 流动 0.5 m ， 比 在 静脉 中 流动 速度 的 (2/3) 还 多 (7/18) ， 血液 在 静脉 中 流动 的 速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8537", "content": "(8/9) 千克 大豆 可以 榨油 (1/3) 千克 ， 1 千克 大豆 能 榨油 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1155", "content": "4 个人 6 天 加工 了 528 个 零件 ， 平均 每人每天 加工 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7899", "content": "小强 看 一本 60 页 的 科技 书 ， 上午 看 了 总 页数 的 (1/4) ， 下午 看 了 总 页数 的 20% ， 还 余下 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19069", "content": "甲 数 是 30 ， 比 乙 数 少 (1/10) ， 乙 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20232", "content": "一 块 地 今年 产 粮食 1500 千克 ， 比 去年 多产 300 千克 ， 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23056", "content": "妈妈 买 了 一套 运动服 164 元 ， 一双 运动鞋 59 元 ， 一共 应付 多少 元 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20229", "content": "计算 ： 1.996 + 19.97 + 199.8 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7531", "content": "某 修理部 要 修 380 台 机器 ， 前 4 天 每天 修 60 台 ， 余下 的 2 天 修 完 ， 平均 每天 要 修 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17065", "content": "要 加工 一批 汽车配件 ， 原 计划 每天 加工 200 个 ， 15 天 完成 任务 ． 实际 每天 加工 了 250 个 ． 这样 比 原 计划 提前 几天 完成 了 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7683", "content": "某 工厂 计划 生产 一批 零件 ， 第一季度 完成 全部 任务 的 60% ， 第 二 季度 和 第一季度 完成 的 同样 多 ， 结果 超产 60 个 ， 这个 工厂 实际 生产 零件 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4543", "content": "5 （ 1 ） 班 50 人 参加 语文 和 数学 竞赛 ， 参加 语文 竞赛 所有 30 人 ， 参加 数学 竞赛 的 有 38 人 ， 两 科 都 不 参加 的 有 2 人 ， 两 科 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18556", "content": "暑假 中 ， 玲玲 借 到 一本 《 哈利 • 波特 》 的 书 ， 原 计划 平均 每天 看 26 页 ， 10 天 看 完 ． 由于 比较 好看 ， 实际 平均 每天 多 看 14 页 ， 实际 几天 看 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9722", "content": "甲乙 两 人 同时 从 ab 两地 相对 而 行 ， 甲 走 到 全程 的 (5/11) 时 与 乙 相遇 ． 如果 甲 每 小时 走 4.5 千米 ， 乙 5 小时 可以 走 完全 程 ． ab 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "947", "content": "某 幼儿园 准备 发 铅笔 ， 发给 32 个 班 ， 每班 321 枝 ， 还 需 留 170 枝 备用 ． 幼儿园 应 买 多少 枝 铅笔 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1328", "content": "甲 数 是 乙 数 的 (1/4) ， 则 甲 数 是 甲 、 乙 两 数 和 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5511", "content": "一 个数 乘以 12 的 积 ， 与 18 * 14 的 积 相等 ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9975", "content": "孙 军 今年 12 岁 ， 爷爷 的 年龄 是 他 的 5 倍 多 7 岁 ， 爷爷 今年 多 大 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14712", "content": "“ 家电 下乡 ” ， 政府 对 按 产品 销售价 的 13% 进行 财政补贴 的 优惠政策 ， 张 大爷 享受 了 这 一 政策 买 了 一台 冰箱 ， 补贴 195 元 ， 张 大爷 买 这 台 冰箱 付 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9626", "content": "871 - 299 =", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1058", "content": "淘气 家里 准备 买车 了 ， 爸爸 看中 了 一款 小轿车 ， 如果 分期付款 要 比 定价 多付 10% ， 如果 现金 一次性 付款 能 打 0.95 ． 淘气 算了 一下 ， 两种 付款 方式 有 9000 元 的 差价 ． 这 款 小轿车 的 定价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13042", "content": "某 厂 计划 全年 完成 1600 万元 产值 ， 上半年 完成 了 全年 计划 的 (3/5) ， 下半年 比 上半年 多 完成 (1/8) ， 这样 全年 产值 可 超过 计划 多少 吨 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "7071", "content": "一 杯 牛奶 ， 妈妈 喝 了 (1/4) ， 儿子 喝 了 剩下 的 (1/2) ， 儿子 喝 了 这 杯 牛奶 的 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7070", "content": "一 条 绳子 长 (5/6) 米 ， 第一天 剪 去 它 的 (1/4) ， 第 二 天 剪 去 它 的 (2/5) ， 还 剩 这 条 绳子 的 几分 之 几 没有 剪 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1253", "content": "校门口 一条 长 85 米 的 林 阴道 一旁 栽 了 一行 树 ， 起点 和 终点 都 栽 ， 一共 栽 了 18 棵 ， 相邻 两棵树 之间 的 距离 相等 ． 求 相邻 两棵树 之间 的 距离 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10502", "content": "王 婕 看 一本 216 页 的 故事书 ， 已经 看 了 8 天 ， 每天 看 12 页 ， 剩下 的 每天 看 20 页 ， 还 需要 多少 天 看 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1566", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行 了 120 千米 ， 占 全长 的 (3/4) ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4569", "content": "在 地毯 35 米 长 的 一边 ， 每 5 米 布置 一盆 鲜花 （ 两端 不 布置 ） ， 一共 要 多少 盆 鲜花 ﹖", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10260", "content": "两个 修路 队 合 修 一段 公路 ， 甲队 5 人 修 了 (27/5) 千米 ， 乙 队 4 人 修 了 (18/5) 千米 ， 甲乙 两队 平均 每人 修 了 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20479", "content": "一 个 平形四边 形 的 面积 是 5.6 平方米 ， 高 是 2 米 ， 底 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12806", "content": "小强 每分钟 走 72 米 ， 要 8 分钟 才能 走 到 学校 ， 小强 每天 上 、 下 学 要 往返 2 次 ， 他 每天 要 走 多少 米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "11115", "content": "大 卖场 运 来 215 盒 薯片 ， 比 运 来 的 巧克力 少 15 盒 ， 大 卖场 运 来 的 巧克力 多少 盒 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19618", "content": "水 结成 冰 ， 体积 增加 (1/10) ， 一块 体积 为 143 立方分米 的 冰 化成 水 后 ， 体积 应该 = 多少 立方分米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3686", "content": "口袋 里 有 12 个 球 ， 从 里面 任意 摸 一个 球 ， 摸 到 红球 的 可能性 为 (3/4) ， 口袋 里 可能 有 多少 个 红球 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14506", "content": "4.8 - 2.1 与 2.39 的 和 ， 再 除以 20 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6594", "content": "商店 运进 10.5 吨 大米 ， 第一天 卖出 4.39 吨 ， 第 二 天 卖出 4.18 吨 ． 哪 天 卖出 的 多 ？ 多 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18379", "content": "一 个 平行四边形 ， 其中 的 两条 边 分别 是 10 厘米 与 6 厘米 ， 有 一条 高 8 厘米 ， 它 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20286", "content": "一 种 电冰箱 的 价格 打 0.78 后 ， 比 原价 便宜 330 元 ， 这种 电冰箱 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20765", "content": "一 根 电线 截去 (1/4) 后 再 接上 12 米 ， 结果 比 原来 长 (1/3) ． 这根 电线 原 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22650", "content": "某 学校 低年级 有 600 人 ， 中年级 人数 是 低年级 的 (5/6) ， 又 是 高年级 的 (5/7) ． 这个 学校 高年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8309", "content": "学校 要 为 图书室 增加 两种 新书 ． 一种 历史 书 每套 125 元 ， 一种 科技 书 每套 18 元 ， 每种 3 套 ． 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5909", "content": "甲 、 乙 两地 相距 405 千米 ， 一辆 货车 和 一辆 客车 分别 从 两地 同时 出发 ， 相向 而 行 ． 已知 客车 每 时 行驶 45 千米 ， 货车 的 速度 比 客车 慢 (1/5) ． 经过 多长时间 两车 可以 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6454", "content": "甲 数 比 乙 数多 25% ， 那么 乙 数 就 比 甲 数 少 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7091", "content": "从 2100 里 减去 50 ， 再 加上 20 ， 这 称作 1 次 操作 ， 经过 多少 次 操作 ， 所得 的 结果 是 0 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14888", "content": "小 华 有 一 本书 ， 第一天 看 了 全书 的 (3/10) ， 第 二 天 看 了 全书 的 (4/10) ， 两天 一共 看 了 全书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8879", "content": "罗南 中心小学 有 柳树 38 棵 ， 松树 的 棵 树 比 柳树 的 2 倍 多 10 棵 ． 柳树 和 松树 一共 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7461", "content": "某 公司 要 生产 54 万 部手机 ， 前 10 天 平均 每天 制造 1.5 万部 ， 余下 的 要 在 20 天 完成 ， 平均 每天 要 制造 多少 万部 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "820", "content": "一 份 稿件 ， 甲 单独 打 要 (1/4) 小时 ， 乙 单独 打 要 (1/3) 小时 ， 现 2 人 合 打 ， 多少 小时 才能 打 完 这份 稿件 的 (2/5) ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2266", "content": "商店 里 有 圆珠笔 72 盒 ， 钢笔 的 盒 数 是 圆珠笔 的 (7/9) ． 铅笔 的 盒 数 是 钢笔 的 (11/8) ． 商店 里 有 铅笔 多少 盒 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12547", "content": "学校 买来 12 只 足球 和 16 只 篮球 ， 共 付款 2176 元 ， 已知 每 只 足球 68 元 ， 每 只 篮球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12486", "content": "搬运 1200 只 瓶子 ， 每 搬运 30 只 可 得 运费 5 元 ， 损坏 的 瓶子 不 给 运费 ， 某人 共 得 运费 185 元 ， 问 他 损坏 了 几只 瓶子 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8014", "content": "“ 6 一 ” 儿童节 ， 大队 辅导员 为 优秀 少先队员 买 奖品 ． 原 计划 买 6 本 笔记本 ， 共 需 72 元 钱 ， 现在 准备 买 这样 的 笔记本 15 本 ， 需要 多少 元 钱 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11254", "content": "多少 米 绳子 增加 25% 后 长 为 50 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18008", "content": "某 书店 打 0.7 销售 ， 王 俊 买 了 一本 《 少年 百科全书 》 比 原价 便宜 6 元 ， 这 本书 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8358", "content": "从 甲 村 到 乙 村 ， 有 2 条 路 可 走 ， 从 乙 村 到 丙村 有 3 条 路 可 走 ． 如果 从 甲 村 经 乙 村 到 丙村 ， 有 多少 条 不同 的 路 可 走 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2590", "content": "小 明 上楼 ， 每 上 一层楼 需要 20 秒 ， 那么 以 这样 的 速度 ， 从 1 楼 到 5 楼 需要 多少 秒 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8625", "content": "一 辆 公共汽车 共 载客 42 人 ， 其中 一部分 人 在 中途下车 ， 每张 票价 6 元 ， 另 一部分 人 到 终点 下车 ， 每张 票价 9 元 ， 售票员 共 收 票款 318 元 ， 中途下车 的 有 多少 人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12633", "content": "学校 图书室 购进 300 本 故事书 ， 比 科技 书 的 2 倍 多 50 本 ． 购进 科技 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17934", "content": "在 一个 不 透明 的 盒子 里 放入 1 个 红球 ， 2 个 黄 球 ， 3 个 黑 球 ， 4 个 白 球 ． 摸 得 白 球 的 概率 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18113", "content": "小 莉 家 前年 在 银行 存入 人民币 4500 元 ， 2 年 后 共 得 本息 4674.96 元 ， 求 年利率 ． （ 不用 扣 利息税 ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21411", "content": "学校 图书馆 有 文艺 书 135 本 ， 故事书 的 本 数 是 文艺 书 的 1.2 倍 ， 故事书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12607", "content": "晚自习 时 同学 们 写 作业 ， 写 完 语文 作业 的 有 32 人 ， 写 完 数学 作业 的 有 25 人 ， 两种 作业 都 写 完 的 有 8 人 ， 都 没有 写 完 的 有 2 人 ． 这个 班 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18498", "content": "比 3.3 的 3 倍 多 0.3 的 数 除以 0.24 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7125", "content": "一 根 长 12.56 米 的 绳子 把 一个 圆 刚好 可以 绕 10 圈 ， 这个 圆 的 直径 大约 = 多少 米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16280", "content": "某 抢险 工程队 要 疏通 一条 长 14.5 千米 的 公路 ， 第一天 疏通 了 0.35 千米 ， 第 二 天 比 第一天 多 疏通 0.15 千米 ． 两天 后 还有 多少 千米 没有 疏通 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4276", "content": "王老师 5 月份 的 工资 是 1200 元 ， 按照 个人所得税法 规定 ， 个人 的 月 收入 超过 1000 元 的 部分 ， 应 按照 5% 的 税率 征收 个人所得税 ． 王老师 这个 月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6921", "content": "小 王 买 了 一辆 9600 元 的 摩托车 ． 按规定 ， 买 摩托车 要 缴纳 10% 的 车辆 购置税 ． 小 王 买 这辆 车 一共 要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20132", "content": "6 （ 2 ） 班 有 48 人 ， 每人 至少 订 一本 刊物 ， 已知 有 (2/3) 的 同学 订 了 《 少年报 》 ， 有 (3/4) 的 同学 订 了 《 语文报 》 ， 这 两种 报纸 都 订 的 同学 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6302", "content": "丰华 农场 种 玉米 120 公顷 ， 种 玉米 的 面积 是 小麦 的 (8/11) ， 这个 农场 种 玉米 和 小麦 共 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12253", "content": "一 个 因数 是 540 ， 另 一个 因数 是 5 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15763", "content": "“ 陈省身 数学 周 ” 组委会 为了 奖励 参加 活动 的 学生 ， 买来 数学 故事 数 和 数学 文化 书 共 2010 本 ， 其中 数学 文化 书 是 数学 故事书 的 4 倍 ， 那么 数学 故事 数 有 多少 本 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19714", "content": "因为 国家 进一步 实行 免费 义务教育 政策 ， 小 明 坐在 的 学校 学生 人数 今年 比 去年 增加 了 (1/11) ， 小 明 所在 的 学校 去年 有 132 名 学生 ， 今年 有 多少 名 学生 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4610", "content": "一 根 电线杆 埋入 土 中 的 部分 占 全长 的 14% ， 露出 地面 有 12.9 米 ， 这根 电线杆 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10625", "content": "活动室 有 24 盒 象棋 ， 军棋 的 盒 数 是 象棋 的 2 倍 ， 跳棋 有 12 盒 ， 跳棋 比 军棋 少 多少 盒 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "757", "content": "11.7 里 有 多少 个 2.6 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18912", "content": "五年级 同学 植树 98 棵 ， 六年级 比 五年级 植树 棵 树 的 2 倍 多 4 棵 ， 六年级 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20173", "content": "甲 数 是 1200 ， 比 乙 数多 278 ， 乙 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12640", "content": "修 一条 路 ， 前 4 天 修 了 160 米 ， 照 这样 的 速度 ， 还要 8 天 才能 把 路 全部 修 完 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19244", "content": "小 明 读 一本 故事书 ， 第一天 读 了 24 页 ， 占 全书 的 (3/8) ， 第 二 天 读 了 全书 的 37.5% ， 还 剩 多少 页 没有 读 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21332", "content": "甲乙 两个 工程队 合 埋 一条 长 9.45 千米 的 地下 电缆 ， 甲队 每天 埋 0.8 千米 ， 工作 6 天 后 ， 剩下 的 由 乙 队 5 天 埋 完 ， 乙 队 每天 埋 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4054", "content": "一 瓶 油 重 (8/5) 千克 ， 用 去 25% ， 用 去 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4724", "content": "多少 个 (1/4) 是 1 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1751", "content": "5.6 与 0.7 的 和 乘以 1 与 0.4 的 差 ， 得 多少 ？ 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7584", "content": "运输 公司 为 某 厂 运 1500 套 玻璃 茶具 ， 每套 运费 2 元 ， 每 损坏 一套 ， 不但 没有 运费 ， 还要 从 运费 中 扣除 赔偿费 78 元 ， 结果 运输 公司 实 得 运费 2440 元 ． 运输 过程 中共 损坏 多少 套 茶具 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3335", "content": "有 2 个 大人 和 3 个 小孩 ， 每个 大人 抱 每个 小孩 一次 ， 一共 要 抱 多少 次 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21306", "content": "学校 买来 8 箱 图书 ， 每箱 80 本 ， 平均 分给 5 个 年级 ， 每个 年级 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17719", "content": "(3/4) - (2/5) 与 (1/4) 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22282", "content": "李 明 家 去年 养鸭 600 只 ， 今年 比 去年 多 248 只 ， 今年 和 去年 一共 养 了 多少 只 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15500", "content": "六年级 二 班 共有 学生 45 人 ， 其中 女生 有 21 人 ， 再 增加 多少 名 女生 ， 这时 女生 人数 刚好 是 全班 人数 的 (1/2) ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16274", "content": "同学 们 用 一根 长 13 米 的 绳子 ， 绕 树干 4 周 ， 余 0.44 米 ， 这 棵 大树 的 直径 = 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2074", "content": "为了 给 城市 增添 一片 绿 ， 某 市政府 决定 今年 在 街道 两旁 植树 60000 棵 ， 樟树 和 广玉兰 的 棵 树 比 是 3 ： 2 ， 樟树 多少 棵 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22419", "content": "工人 师傅 要 做 480 个 零件 ， 已经 做 完 120 个 ， 如果 每 小时 做 90 个 ， 还要 几小时 能 全 做 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16044", "content": "修路 队 新建 一条 高速公路 ， 前 8 天 修 了 360 米 ， 照 这样 的 速度 ， 又 修 了 15 天才 完成 ， 这 条 路 共 长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12758", "content": "从 甲 城 到 乙 城 有 420 千米 ． 一辆 汽车 3 时 行驶 了 全程 的 60% ， 这辆 汽车 平均 每 时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13919", "content": "一 本书 若 定价 每 本 10 元 ， 获得 的 纯利润 是 25% ； 如果 想 使 获得 的 纯利润 是 40% ， 则 每 本书 应 定价 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18633", "content": "南山 小学 共 占地 8000 平方米 ， 其中 绿地面积 占 65% ， 其余 为 教学楼 和 道路 等 ， 南山 小学 的 绿地面积 有 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15781", "content": "多少 / 7 = 121 … 1 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2273", "content": "棉花 产量 是 487 万吨 ， 茶叶 产量比 棉花 产量 少 409 万吨 ， 早稻 产量比 茶叶 多 3866 万吨 ． 早稻 产量 = 多少 万吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1679", "content": "一 批 圆珠笔 ， 如果 每 袋装 6 支 ， 可以 装 36 袋 ． 如果 每 袋装 4 支 ， 可以 装 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8188", "content": "甲 数 是 (3/4) ， 乙 数 比 甲 数 少 (2/3) ， 乙 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20365", "content": "王 叔叔 用 电脑 练习 打字 ， 前 5 分钟 打 了 120 个 字 ， 照 这样 计算 ， 打 一篇 1200 字 的 文章 ， 需要 打 多长时间 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18649", "content": "实验 小学 合唱组 有 120 人 ， 美术组 人数 是 合唱组 的 (3/5) ， 科技 组 的 人数 是 美术组 的 (2/3) ． 科技 组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11206", "content": "兰兰 参加 夏令营 ， 原 计划 9 天 交 135 元 住宿费 ， 后来 夏令营 延长 了 4 天 ． 兰兰 还要 补交 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16496", "content": "车站 有 一批 货物 ， 上午 运走 了 总数 的 20% ， 下午 运走 了 总数 的 40% ， 还 剩下 16 吨 ， 这 批 货物 原来 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15871", "content": "羊毛衫 厂 原来 6 天 生产 羊毛衫 2340 套 ， 现在 每天 比 原来 每天 多 生产 120 套 ． 现在 每天 生产 羊毛衫 多少 套 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19265", "content": "小 红 4 天 看 了 32 页 故事书 ， 小 刚 每天 看 24 页 ， 小 刚 每天 看 的 页数 是 小 红 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12435", "content": "一 本书 ， 小 聪 第一天 看 了 全书 的 (3/5) ， 第 二 天 看 了 20 页 ， 正好 占 全书 的 (1/6) ， 第一天 看 了 多少 页 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20748", "content": "生 生 做 口 算题 的 正确率 是 98% ， 考试 中 生 生 做 错 4 题 ， 生 生 做 对 多少 题 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19762", "content": "一 台 冰箱 的 进价 是 1000 元 ， 如果 商家 要 盈利 30% ， 那么 售价 = 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16290", "content": "今年 5 月 某 餐厅 的 营业额 25000 元 ， 除了 按 营业额 的 5% 缴纳 营业税 以外 ， 还要 按 营业税 的 7% 缴纳 城市 维护 建设 税 ． 这个 月 该店 需 缴纳 营业税 和 城市 维护 建设 税 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "7938", "content": "一 个数 的 (3/4) 与 5 的 差 是 1 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18488", "content": "甲 、 乙 两列 火车 同时 从 两城 相对 开出 ， 5 小时 后 相遇 ， 甲 车 每 小时 行 90 千米 ， 乙 车 每 小时 比 甲 车 慢 10% ， 两城 相距 多 远 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "12861", "content": "一 个数 除以 8 ， 商 是 5 ， 余数 是 6 ， 这个 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15104", "content": "小 丽 买 了 9 个 面包 ， 小 华 买 了 6 个 面包 ， 小 明 买 了 7 个 面包 ， 小 丽 比 小 华 多用 15 元 钱 ， 小 明 花 了 多少 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21547", "content": "一 家 童装 公司 ， 3 月份 预订 到 一份 6000 件 的 童装 业务 ， 每套 估计 用布 1.4 米 ， 由于 改进 了 裁剪 方法 ， 实际 每套 节省 0.2 米 ． 原来 的 用布 量 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17793", "content": "把 3 块 蛋糕 平均 分给 7 个人 ， 每人 分 得 多少 块 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4108", "content": "医院 常用 的 碘酒 是 用 碘 和 酒精 按 2 ： 25 的 比例 配成 的 ， 现在 要 配制 1890 克 这样 的 碘酒 ， 需要 碘 多少 克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3114", "content": "350 克 比 80 克 多 多少 克 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9278", "content": "李老师 带 800 元 买 学习用品 ， 买 了 16 盒 钢笔 ， 还 剩下 80 元 ， 每盒 钢笔 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4011", "content": "工程队 要 修 一条 长 (7/8) 千米 的 水渠 ． 第一天 修 了 全长 的 (1/3) ， 第 二 天 修 了 全长 的 (3/8) ， 还 剩 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "541", "content": "有 7500 块砖 ， 用 小车 运 要 运 15 次 ， 如果 改用 大车 运 ， 要 运 10 次 ． 大车 比 小车 每次 多 运 多少 块 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7472", "content": "食堂 运 来 560 千克 大米 ， 已经 吃 了 8 袋 ， 每 袋 25 千克 ， 还 剩 多少 千克 大米 没 吃 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12599", "content": "一 种 圆珠笔 原价 每支 4.8 元 ， 降价 后 每支 便宜 0.3 元 ， 原来 买 150 支 笔 的 钱 ， 现在 可以 买 多少 支 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6395", "content": "火电厂 实际 烧煤 比 计划 烧煤 节约 50 吨 ． 实际 烧煤 950 吨 ， 比 计划 节约 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4918", "content": "有 960 节电池 ， 每 8 节 装 一盒 ， 5 盒装 一箱 ． 这些 电池 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10876", "content": "一 个 足球 35 元 ， 一个 篮球 比 一个 足球 贵 20% ， 一个 篮球 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14046", "content": "工厂 生产 发电机 ， 原 计划 每天 生产 36 台 ， 10 天 完成 ， 实际 只用 9 天 就 完成 任务 ． 实际 每天 比 原 计划 多 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13078", "content": "据 科学 推算 ， 地球 上 重 一 千克 的 物体 ， 到 月球 上 只有 (1/6) 千克 重 ， 小 亮 的 体重 是 42 千克 ， 如果 到 月球 上 ， 他 的 体重 = 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2889", "content": "冰 融化 成 水 后 ， 水 的 体积 变为 冰 的 体积 的 (10/11) ， 现在 有 块冰 ， 融化 成 水 后 的 体积 是 30 立方分米 ， 这 块冰 的 体积 = 多少 立方分米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17456", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 前 3 小时 行 了 168 千米 ， 照 这样 的 速度 又 行 了 5 小时 ， 正好 到达 乙地 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13204", "content": "计算 ： 11 * 327327 * 125 - 3 * 125125 * 327 = ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "12025", "content": "五年级 有 200 人 ， 六年级 的 人数 比 五年级 人数 多 (1/5) ， 六年级 有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16890", "content": "0.7 吨 的 40% = 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22536", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行驶 了 全程 的 30% ， 离 终点 还有 140 千米 ， 甲地 到 乙地 的 路程 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "283", "content": "统计 部门 对 39 户 居民 家用电器 购买 情况 进行 调查 ， 他们 发现 每 至少 有 一种 电器 ， 其中 有 收录机 的 25 户 ， 有 彩电 的 20 户 ， 有 冰箱 的 12 户 ， 收录机 、 彩电 都 有 的 10 户 ， 彩电 、 冰箱 都 有 的 3 户 ， 没有 3 种 电器 都 具备 的 ， 收录机 和 电冰箱 都 有 的 共 多少 户 ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14602", "content": "某 养鸡场 这个 星期 共 收 鸡蛋 1320 千克 ， 每 筐 最 多 装 24 千克 ， 这个 星期 的 鸡蛋 至少 要 多少 筐 才能 完全 装 下 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14621", "content": "利民 超市 为了 供应 节日 市场 ， 新 进 一批 商品 ， 第一天 就 卖 了 全部 的 (3/10) 还 多 8 件 ， 这时 还 余下 76 件 ． 这 批 商品 共有 多少 件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12626", "content": "一 种 药水 是 由 药液 和 水 按照 1 ： 500 的 比配 成 的 ． 要 配制 这种 药水 4008 千克 ， 需要 药液 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6058", "content": "两 数 相加 ， 和 是 15.9 ， 如果 一个 加数 减少 6.2 ， 另 一个 加数 增加 2.4 ， 和 应变 为 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18515", "content": "据统计 ， 全球 荒漠化 土地 面积 达到 3600 万 平方千米 ， 占 陆地 总面积 的 (1/4) ， 而且 每年 仍 以 约 6 万 平方千米 的 速度 扩展 ． 如 不 制止 ， 多少 年 后 ， 地球 上 连 一根 草 都 看不到 了 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14606", "content": "有 一条 长 800 米 的 公路 ， 在 公路 的 一侧 从头到尾 每隔 20 米 栽 一棵 杨树 ， 需 多少 棵 杨 树苗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "60", "content": "爬 雪山 与 在 平地上 行走 完全 不同 ， 需要 一步 一个 脚窝 地 向前 跋涉 ． 同学 们 在 雪地 中 平均 每分钟 可 行走 8 米 ， 从 山脚 到 山顶 走 了 (3/4) 小时 ， 从 山脚 到 山顶 约 有 多少 米 的 路程 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7224", "content": "采购员 小 李 买 了 5 支 钢笔 用 去 了 40 元 钱 ， 采购员 小 王 准备 买 同样 的 钢笔 12 支 ， 需要 带 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "355", "content": "同学 们 做 了 192 朵花 ， 每 6 朵 扎成 一束 ， 如果 把 为 些 花 分给 4 个 班 ， 每班 分 得 多少 束 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15086", "content": "超市 里 运进 1200 箱 饮料 ， 其中 矿泉水 占 (1/3) ， 碳酸 饮料 占 (2/5) ， 其余 的 是 果汁 类 饮 ， 果汁 类 饮料 运 来 多少 箱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19175", "content": "青蛙 可以 活 6 年 ， 比目鱼 可以 活 60 年 ． 比目鱼 的 寿命 是 青蛙 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15536", "content": "工人 运 青瓷 花瓶 250 个 ， 规定 完整 运 一个 到 目的地 给 运费 20 元 ， 损坏 一个 倒赔 100 元 ， 运 完 这 批 花瓶 后 ， 工人 共 得 4400 元 ， 则 损坏 了 多少 只 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10108", "content": "一 件 服装 的 售价 是 246 元 ， 它 的 盈利率 是 20% ， 那么 这件 服装 的 成本价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10520", "content": "物流 公司 6 辆 卡车 7 趟 共 运送 货物 315 吨 ， 平均 每辆 卡车 每 趟 运货 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10009", "content": "本次 列车 全程 运行 640 千米 ， 前 3 小时 共 行 了 240 千米 ， 剩下 的 路程 平均 每 小时 行 80 千米 ， 行 完全 程 共用 几小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15511", "content": "一 堂 课 共 (2/3) 小时 ， 在 这 堂 课 中 我们 动手 操作 用 了 (1/5) 小时 ， 老师 引导 讲解 用 了 (3/10) 小时 ， 其余 时间 我们 自主 作业 ． 自主 作业 用 了 多少 小时 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17951", "content": "学校食堂 买来 大米 250 千克 ， 正好 是 买来 面粉 的 (5/7) ， 食堂 买来 的 大米 和 面粉 一共 有 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19360", "content": "甲乙 两地 相距 302 千米 ， 一辆 客车 从 甲地 开往 乙地 ， 每 小时 行驶 80 千米 ， 已经 行驶 了 2.5 小时 ， 余下 的 路程 要求 在 1.2 小时 内 到达 乙地 ， 请问 余下 的 路程 客车 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11042", "content": "0.125 * 160 * 5000 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10270", "content": "大雁 平均 每分钟 飞行 889 米 ， 燕子 平均 每分钟 飞行 645 米 ． 同时 起飞 15 分钟 后 ， 大雁 比 燕子 多 飞 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19917", "content": "一 段 路 已修 了 (5/8) 千米 ， 占 全长 的 (5/9) ， 这 段 路 全长 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12875", "content": "有 两块 麦地 第一块 2 公顷 ， 平均 每 公顷 收 小麦 16.5 吨 ， 第 二 块 3.5 化 顷 ， 共 收 小麦 23.1 吨 ， 两块 地 平均 每 公顷 收 小麦 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "59", "content": "一 根 绳子 长 24 米 ， 剪 6 米 做 一根 长 跳绳 ， 剩下 的 每 2 米 做 一根 短 跳绳 ， 最 多 做 几根 短 跳绳 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8729", "content": "199999 + 19999 + 1999 + 199 + 19 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "19718", "content": "一 盒 蛋糕 126 元 ， 一箱 蛋糕 有 4 盒 ， 一箱 蛋糕 一共 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2186", "content": "学校 图书馆 共运 来 700 本书 ， 准备 放在 7 个 书架上 ， 每个 书架 有 5 层 ． 请 你 算 一 算 书架上 每层 放 多少 本书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21604", "content": "教师节 那天 ， 6 （ 1 ） 班 42 人 中 ， 有 (1/3) 的 同学 提前 到 教室 布置 教室 ， 而 参加 给 老师 制作 贺卡 的 同学 是 布置 教室 同学 的 (8/7) 倍 ， 有 多少 名 同学 参加 了 制作 贺卡 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "602", "content": "一 条 马路 长 120 米 ， 从 一头 开始 种 树苗 ， 每隔 8 米 栽 一棵 ， 一共 栽 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21490", "content": "人民 小学 为 400 名 学生 投保 “ 平安保险 ” ， 保险金额 每人 5000 元 ， 保险期限 一年 ． 按 年 保险费率 0.4% 计算 ， 学校 应付 保险费 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14695", "content": "一 批 芝麻 的 出油率 是 30% ． 要 榨出 (9/50) 吨 芝麻油 ， 需要 这种 芝麻 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9867", "content": "32 与 23 的 积 减去 308 / 14 所得 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4796", "content": "一 堆 煤 有 25 吨 ， 运走 了 (2/5) ． 运走 了 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20261", "content": "比 260 的 3 倍 多 47 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11047", "content": "甲乙 两组 用 5 天 时间 完成 一批 机器 零件 的 制造 任务 ． 甲组 每天 做 160 个 ， 乙组 每天 做 140 个 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8948", "content": "3.1 / 0.7 = 4 … 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13358", "content": "从 下午 3 时 到 下午 6 时 ， 三年级 同学 共 浇 了 906 棵 树 ． 他们 平均 每 小时 浇 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5462", "content": "50 个 8 相加 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9457", "content": "一 包 瓜子 的 重量 是 (1/4) 千克 ， 一包 糖 比 一包 瓜子 重 (2/4) 千克 ， 一包 糖 的 重量 = 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10264", "content": "张 大伯 收 了 一批 西瓜 ， 第一天 卖出 了 总数 的 (3/8) ， 第 二 天 卖出 了 总数 的 (1/4) ， 两天 一共 卖出 总数 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22885", "content": "师傅 和 徒弟 同时 开始 生产 ， 各 要 做 100 个 零件 ， 师傅 每 小时 生产 25 个 ， 当 师傅 完成 任务 时 ， 徒弟 还要 做 1 小时 才能 完成 任务 ． 徒弟 每 小时 生产 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20361", "content": "折 一个 纸飞机 用 (1/4) 张 彩纸 ， 黄 芳 折 了 60 个 纸飞机 ， 共用 了 多少 张 彩纸 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13540", "content": "黄豆 中 的 蛋白质 含量 约 是 36% ， 250 克 黄豆 中 ， 蛋白质 约 有 多少 克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2713", "content": "妈妈 买 一件 衣服 花 了 120 元 ， 妈妈 说 是 商场 打 0.8 卖 的 ， 这种 衣服 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6779", "content": "（ 500 - 180 ） / （ 17 + 23 ） = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12997", "content": "丰收 粮店 运 来 大米 80 袋 ， 运 来 的 面粉袋 数 比 大米 的 3.5 倍 还 多 23 袋 ， 运 来 的 面粉 有 多少 袋 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15747", "content": "某 厂 去年 收入 总额 900 万元 ， 按 国家 的 税率 规定 ， 应 缴纳 17% 的 增值税 ． 一共 要 缴纳 多少 万元 的 增值税 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17270", "content": "小 华 从 家 到 学校 每分钟 走 60 米 ， 12 分钟 可以 走 到 ． 小 华 家 离 学校 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16361", "content": "一 个数 的 (2/3) 是 15 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "205", "content": "某 工厂 有 职工 500 人 ， 某 天 出勤率 是 95% ， 其中 出勤 女工 占 出勤 职工 的 60% ， 这天 出勤 的 女工 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19520", "content": "一 堆 煤 有 750 千克 ， 用 3 辆 小推车 5 次 运 完 ． 平均 每辆 小推车 每次 运 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20796", "content": "修 一条 1500 米 长 的 路 ， 第一周 完成 了 全 工程 的 (1/4) ， 第 二 周 完成 了 全 工程 的 (2/5) ， 再 修 全 工程 的 几分 之 几 就 完成 了 全部 任务 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20049", "content": "一 批 面粉 卖出 (1/3) ， 还 剩 420 千克 ． 这 批 面粉 共 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3768", "content": "修 一条 长 21.6 千米 的 路 ， 原 计划 45 天 修 完 ， 实际 每天 比 原 计划 多 修 0.12 千米 ， 实际 要 多少 天 修 完 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13016", "content": "王平 计划 看 一本 小说 ， 他 前 4 天 平均 每天 看 28 页 ， 后 3 天 平均 每天 看 21 页 ， 求 王平 平均 每天 看 多少 页 书 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20496", "content": "一 列 火车 ， 从 车头 达到 山洞 的 洞口 算 起 ， 用 16 秒 全部 行驶 进 山洞 ， 45 秒 后 车尾 离开 山洞 ． 已知 山洞 长 638 米 ， 火车 全长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11697", "content": "快 过年 了 ， 王 建 家 准备 拿出 一部分 钱 给 全家 购买 新 衣服 ， 其中 爸爸 、 王 建 、 妈妈 的 购 衣服 的 钱款 之 比 为 1 ： 2 ： 3 ， 王 建 说 我 只 花 150 元 ． 则 王 建 全家 准备 购 衣服 的 总 钱 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15454", "content": "一 瓶 果酱 (1/2) 千克 ， 小 明 家 5 天 吃 完 ， 平均 每天 吃 的 占 整瓶 果酱 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2821", "content": "便利店 运进 香皂 240 块 ， 是 运进 肥皂 块 数 的 1.5 倍 ． 便利店 一共 运进 多少 块 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7174", "content": "480 = 多少 的 24 倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6060", "content": "一 批 货物 ， 每箱 装 20 件 ， 需要 42 只 箱子 ． 如果 每箱 多 装 4 件 ， 需要 多少 只 箱子 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2236", "content": "刘老师 想 买 一套 95 m ^ 2 的 商品房 ， 单价 是 每平方米 5600 元 ， 如果 一次 付清 房款 ， 可以 享受 0.95 优惠 ， 这样 刘老师 共 需 付款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "23071", "content": "车站 水果店 运 来 桃子 850 千克 ， 苹果 1150 千克 ， 如果 把 这些 水果 全部 装 竹篓 里 ， 每 只 竹篓 装 100 千克 ， 需要 这样 的 竹篓 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9776", "content": "聪聪 家 有 3 口 人 ， 原来 居住面积 是 75 平方米 ． 搬入 新居 后 ， 居住面积 有 120 平方米 ， 聪聪 家 人均 居住面积 比 原来 增加 了 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10985", "content": "林 叔叔 开车 从 甲地 到 乙地 一 共用 了 6 小时 ， 每 小时 行 50 km ， 返回 时 用 了 4 小时 ， 返回 时 每 小时 行 多少 km ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13201", "content": "某 剧场 能 坐 870 人 ， 一场 电影 的 票价 是 8 元 ， 这场 电影 的 票房 收入 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12971", "content": "光明 小学 体育 达标 人数 占 全校学生 总数 的 (3/5) ， 正好 是 270 人 ， 全校 有 学生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "286", "content": "某种 商品 的 成本 是 37.4 元 ， 比 原来 降价 15% ， 原来 的 成本 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4527", "content": "有 一根 钢管 ， 用 0.5 小时 锯 6 段 ， 如果 每 锯 一次 所 需 时间 相同 ， 那么 锯 12 段 需要 多少 小时 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6120", "content": "某人 开 汽车 ， 2 小时 行 168 千米 ， 照 这样 的 速度 ， 他 行驶 了 9 个 小时 ， 一共 可以 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22656", "content": "一 条 路 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 全长 的 (2/9) ， 还 剩 560 米 没 修 ， 这 条 路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13541", "content": "一 堆 煤 ， 第一次 运走 (1/3) ， 第 二 次 运走 (2/5) ， 还 剩 120 吨 ， 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9638", "content": "李强 14 分钟 打 了 588 个 字 ， 王 丽 16 分钟 打 了 720 个 字 ， 李强 平均 每分钟 比 王 丽 少 打 多少 个 字 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2993", "content": "一 只 斑马 重 320 千克 ， 比 一头 牛 轻 98 千克 ， 一头 牛 重 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7368", "content": "8 只 羊 9 天 一共 吃 草 288 千克 ， 平均 每 只 羊 每天 吃 草 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13432", "content": "水果店 运 来 480 千克 的 苹果 ， 一共 装 了 2 车 ， 每 车 装 了 40 箱 ， 平均 每箱 装 了 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7712", "content": "今年 6 月份 ， 津 元 中学 9 年级 毕业 离校 学生 人数 比 全校 人数 的 (1/3) 多 10 人 ， 新学期 开学 后 又 招收 7 年级 新生 340 人 ， 且 无 其他 转入 转 出 学生 ， 这样 比 原来 在校 人数 还 多 了 (1/8) ， 原来 全校 有 多少 名 学生 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21697", "content": "一 辆 汽车 的 平均 每 小时 行驶 65.8 千米 ， 他 上午 行驶 了 2.8 小时 ， 下午 又 行驶 了 4.6 小时 ， 这辆 汽车 全天 共 行驶 了 多少 千米 ？ （ 得数 保留 两位 小数 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7195", "content": "多少 * 30 = 420 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18516", "content": "成都 到 广安 的 高速公路 长 约 276 千米 ， 大客车 前 1.4 小时 比 后 2.28 小时 少 行驶 了 66 千米 ． 你 能 求 出 大客车 的 平均速度 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "265", "content": "从 a 城 到 b 城 有 650 千米 ， 一辆 汽车 从 a 城 开往 b 城 ， 已经 行 了 128 千米 ， 剩下 的 路 每 小时 行 58 千米 ， 还要 多少 小时 才能 到达 b 城 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22786", "content": "水果店 运 来 4800 千克 的 水果 ， 一共 装 了 2 车 ， 每 车 装 了 40 箱 ， 平均 每箱 装 了 多少 千克 ？ ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18455", "content": "一 本书 打 0.75 后 的 售价 是 24 元 ， 这 本书 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16561", "content": "蔬菜 店 运 来 508 千克 青菜 ， 运 来 的 萝卜 重量 是 青菜 的 4 倍 ， 蔬菜 店 运 来 萝卜 大约 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5081", "content": "某 公园 上午 有 游人 180 人 ， 下午 有 270 人 ． 如果 每 30 位 游人 需要 一名 保洁员 ， 下午 要 比 上午 多派 几名 保洁员 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8160", "content": "商店 有 一种 衣服 ， 售价 100 元 ， 比 原价 便宜 了 20% ， 比 原来 售价 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4020", "content": "甲乙 两地 相距 480 千米 ， 客车 和 货车 相对 开出 经过 4 小时 相遇 ， 客车 每 小时 行 70 千米 ， 货车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3801", "content": "商店 有 红 气球 40 个 ， 黄 气球 比 红 气球 的 3 倍 多 10 个 ， 黄 气球 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12954", "content": "红旗 小学 有 男生 360 人 ， 女生 人数 是 男生 的 (5/6) ， 红旗 小学 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4260", "content": "3 （ 1 ） 班 小 图书 箱 第一天 借出 了 存 书 的 一半 ， 第 2 天 又 借出 43 本 ， 还 剩 32 本 ． 小 图书 箱 原有 图书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5463", "content": "把 一根 木头 锯断 要 3 分钟 ， 把 木头 锯 成 8 段 要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2931", "content": "抗洪抢险 战斗 中 ， 战士 将 一根 7 米 长 的 木桩 砸 入 河水 中 后 ， 其中 (1/5) 露出 水面 ， (2/7) 在 河底 的 泥土 中 ， 河 水深 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5027", "content": "某 乡 今年 造林 18 公顷 ， 比 计划 多 造林 3 公顷 ． 实际 比 计划 多 造林 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10200", "content": "体育课 上 有 15 人 跳绳 ， 打球 的 人数 是 跳绳 人数 的 (2/3) ， 练 长跑 的 人数 是 打球 人数 的 (4/5) ， 练 长跑 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11830", "content": "“ 李宁 ” 牌 鞋子 打 0.6 后 单价 是 240 元 ， 李宁 ” 牌 鞋子 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5220", "content": "一 根 木料 长 15 米 ， 把 它 锯 成 3 米 长 一段 ， 每 锯 一段 要 5 分钟 ， 锯 完 共用 了 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19827", "content": "3 元 小学 新 买来 50 套 单人 课桌椅 ， 每张 课桌 128 元 ， 每 把 椅子 52 元 ． 一 共用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9317", "content": "学校 把 购进 图书 的 (3/5) 按 2 ： 3 ： 4 分给 4 、 5 、 六年级 ， 已知 六年级 分 到 56 本 ， 学校 共 购进 图书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "8373", "content": "李 阿姨 把 4000 元 存入 银行 ， 为期 5 年 ， 年利率 是 2.88% ， 存款 的 利息 按 5% 的 税率 纳税 ． 到期 时 ， 李 阿姨 可 得 税后 利息 和 本金 一共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9426", "content": "天天 有 12 枝 铅笔 ， 他 送给 平平 2 枝 ， 两 人 的 铅笔 就 一样 多 ， 平平 原来 有 多少 枝 铅笔 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16535", "content": "某 工程队 修 一条 水渠 ， 第一天 修 了 (4/5) 千米 ， 比 第 二 天 多 修 了 (1/5) 千米 ， 两天 修 的 正好 是 全长 的 (2/5) ， 这 条 水渠 长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19275", "content": "黄 叔叔 家 原来 每月 用水 约 10 吨 ． 更换 了 节 水龙头 后 ． 每月 用水 约 8 吨 ， 现在 每月 用水 比 原来 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8003", "content": "一 根 绳子 长 45 米 ， 第一次 用 去 了 (3/5) 米 ， 第 二 次 用 去 了 原 长 的 (2/5) ， 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15425", "content": "六年级 有 60 个 同学 ， 其中 男生 占 (2/3) ， 后来 又 增加 10 名 男 插班生 ， 这时 男生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5402", "content": "可口可乐 每 小箱 6 瓶 ， 每 大箱 24 瓶 ． 买 1 大箱 和 5 小箱 可口可乐 ， 一共 有 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1959", "content": "水泥厂 仓库 有 一批 水泥 ， 第一次 运走 总数 的 40% ， 第 二 次 运走 总数 的 (1/2) ， 还 剩下 100 吨 ， 仓库 原有 水泥 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11270", "content": "5.1 班 的 王小明 在 一次 调查 中 发现 ， 全班 有 (4/5) 的 同学 喜欢 数学 ； (3/4) 的 同学 喜欢 语文 ； 数学 、 语文 两 科 都 不 喜欢 的 同学 占 全班同学 的 (1/20) ； 既 喜欢 语文 又 喜欢 数学 的 同学 占 全班 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19357", "content": "出油率 是 42% 的 油菜籽 榨 得 2100 千克 的 油 ， 共用 去 油菜籽 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2635", "content": "甲 、 乙 两辆 汽车 用 同样 的 速度 先后 从如皋 开往 南京 ， 上午 8 ： 30 ， 甲 车 离 南京 还有 168 千米 ， 乙 车 离 南京 还有 150 千米 ； 上午 10 时 整 ， 甲 车 距离 南京 的 路程 是 乙 车 距离 南京 路程 的 4 倍 ． 此时 ， 乙 车 离 南京 还有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4670", "content": "一 桶 油 ， 第一次 用 去 20% ， 第 二 次 用 去 的 是 第一次 的 (5/6) ， 这时 还 剩下 22 千克 ， 原来 这 桶 油 有 多重 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8954", "content": "三年级 一班 订 《 我 爱 科学 》 的 同学 有 16 人 ， 订 《 故事 大王 》 的 同学 有 20 人 ， 其中 有 7 人 订 了 这 两种 书 ． 三年级 一班 订 这 两种 书 的 一共 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16738", "content": "汽车 车轮 的 直径 是 0.5 米 ， 汽车 行驶 314 米 ， 车轮 滚动 了 几周 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4351", "content": "小 明 家 有 一间 储藏室 ， 从 里面 量 长 1.2 米 ， 宽 0.7 米 ， 高 2.4 米 ， 则 这 间 储藏室 的 容积 = 多少 立方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3387", "content": "一 种 彩电 原价 每 6300 元 ， 第一次 降 原价 的 (1/6) ， 第 二 次 又 降 原价 的 (1/5) ， 现价 每 台 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "6251", "content": "水果 店里 有 500 千克 苹果 ， 卖 了 3 筐 ， 还 剩下 335 千克 ， 平均 每 筐 苹果 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21093", "content": "720 节电池 ， 每 8 节 装 一盒 ， 5 盒装 一箱 ． 这些 电池 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9593", "content": "某 商店 推行 空瓶 兑换 汽水 活动 ， 规定 每 3 个 空 瓶子 可以 换 一瓶 汽水 ， 体育 张老师 买 了 10 瓶 汽水 供 篮球队 的 同学 ， 那么 共有 多少 个 同学 可以 喝 上 汽水 （ 规定 每人 喝 一瓶 ） ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3318", "content": "一 根 绳子 (5/6) 米 ， 用 去 它 的 (1/6) ， 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11092", "content": "有 3 辆 客车 ， 甲乙 两车 从 东站 ， 丙 车 从 西站 相向 而 行 ， 甲 车 每分钟 行 1000 米 ， 乙 车 每分钟 行 800 米 ， 丙 车 每分钟 行 700 米 ， 丙 车 遇到 甲 车 后 20 分钟 又 遇到 乙 车 ． 东西 两站 相距 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "15255", "content": "小 明 看 一本 250 页 的 故事书 ， 已经 看 了 (3/5) ， 已 看 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12743", "content": "一 个数 的 25% 等于 14 与 16 的 和 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15540", "content": "街道 要 更换 一批 水管 ， 已知 新 水管 每 根 长 8 米 ， 原有 的 旧 水管 每 根 长 5 米 ． 现在 有 新 水管 共 400 根 ， 可以 换掉 多少 根 旧 水管 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "656", "content": "据统计 ： 我国 660 个 城市 中 ， 有 (3/10) 的 城市 供水 不足 ． 在 这些 供水 不足 的 城市 中 ， 又 有 (1/3) 的 城市 严重 缺水 ． 我国 严重 缺水 的 城市 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16182", "content": "1997 + 199.7 + 19.97 + 1.997 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3679", "content": "一 列 火车 3 小时 行 273 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 要 20 小时 ， 甲地 到 乙地 有 多 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22244", "content": "甲 数 比 乙 数 的 3 倍 少 198 ， 乙 数 是 420 ， 甲 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16879", "content": "甲乙 两车 分别 从 a 、 b 两地 同时 相对 开出 ， 4 小时 相遇 ， 甲 车 每 小时 行 130 千米 ， 乙 车 每 小时 行 110 千米 ． ab 两地 相距 多少 千米 ？ （ 画 线段 图 整理 条件 和 问题 ， 再 解答 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "922", "content": "一 堆成 梯形 摆放 的 钢管 最 下层 有 7 根 ， 最上层 有 2 根 ， 每 相邻 的 两层 都 相差 1 根 ， 这 堆 钢管 共有 多少 根 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20470", "content": "小 华 身高 比小龙 矮 (1/8) ． 小 华 的 身高 是 112 厘米 ， 小龙 的 身高 = 多少 厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18680", "content": "某队 安装 480 米 的 水管 ， 前 4 天 装 了 120 米 ， 照 这样 计算 ， 安装 完 这 水管 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10508", "content": "一 根 绳子 长 20 米 ， 第一次 用 去 7.6 米 ， 第 二 次 用 去 5.7 米 ， 两次 共用 去 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13557", "content": "口袋 里 有 4 个 黄 球 ， 3 个 红球 ， 2 个 绿 球 和 1 个 蓝球 ， 从 口袋 里 任意 摸 出 一个 球 ， 摸 到 绿 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17922", "content": "电影院 的 叔叔 上个月 去 了 趟 内蒙古 ， 为 内蒙古 的 小朋友 放 了 两部 科学 教育片 ， 第一部 影片 长 615 米 ， 放映 24.6 分钟 ， 第 二 部 影片 长 780 米 ， 要 比 第一部 多 放映 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21893", "content": "李 叔叔 和 王 叔叔 一起 加工 一批 零件 ， 李 叔叔 每 小时 加工 49 个 ， 王 叔叔 每 小时 加工 51 个 ， 两 人 一起 工作 了 6 小时 才 完成 任务 ． 这 批 零件 一共 有 多少 个 ？ （ 运用 简便 方法 计算 ）", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6092", "content": "“ 6 一 ” 节 ， 书店 的 儿童读物 打 0.9 出售 ， 一套 儿童读物 的 现价 360 元 ， 那么 便宜 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6643", "content": "一 条 裤子 的 价钱 是 36.8 元 ， 一件 上衣 的 价钱 是 它 的 1.2 倍 ， 买 一套 这样 的 服装 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8148", "content": "一 堆 煤 720 吨 ， 原 计划 可 烧 120 天 ． 实际 每天 烧煤 4.5 吨 ， 实际 每天 比 计划 节约 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13168", "content": "希望 小学 原 计划 买 12 个 皮球 ， 每个 0.84 元 ， 现在 从 买 此 球 的 钱 中 拿出 1.68 元 买 了 跳绳 ， 剩下 的 钱 可 买 几个 皮球 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4422", "content": "甲 、 乙 两地 相距 390 千米 ， 一辆 汽车 以 每 小时 65 千米 的 速度 行驶 了 4 小时 ， 照 这样 计算 ， 剩下 的 路程 还 需要 行 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2050", "content": "114 是 6 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16043", "content": "儿童节 这天 ， 新华书店 打 0.8 出售 儿童读物 ， 小 朋 买 了 一 本书 ， 比 原价 便宜 1.2 元 ． 这 本书 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14682", "content": "冰 融化 成 水 后 体积 减少 (1/11) ， 现有 一块 冰 体积 是 2 立方米 ， 融化 成 水 后 的 体积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4382", "content": "星光 鞋厂 25 天 生产 600 双 鞋 ， 平均 每天 生产 多少 双 鞋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14293", "content": "李老师 给 三年级 一班 购买 38 套 单价 39.5 元 的 校服 ， 需要 带 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13330", "content": "156 与 429 的 和 比 659 少 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17584", "content": "水果店 运 来 苹果 350 千克 ， 运 来 的 桔子 比 苹果 的 2 倍 少 50 千克 ， 苹果 和 桔子 一共 运 来 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18779", "content": "张师傅 生产 一批 零件 ， 已经 完成 了 计划 的 (5/8) ， 如果 再生产 200 个 这种 零件 ， 就 超额 了 原定 计划 生产 的 25% ， 原 计划 生产 这 批 零件 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2375", "content": "两个 数 的 积 是 406 ， 其中 一个 数 是 29 ， 另 一个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6185", "content": "水果店 运 来 苹果 150 千克 ， 又 运 来 12 箱 梨 ， 每箱 15 千克 ． 运 来 苹果 比 梨 少 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5368", "content": "一 个 梯形 的 上 、 下 底 之 和 是 36 dm ， 是 高 的 4 倍 ， 这个 梯形 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6408", "content": "有 一段 长 8 分 米 ， 横截面 是 一个 边长 6 分 米 的 正方形 的 长方体 铁块 ， 已知 每 立方分米 铁 重 7.8 千克 ， 这块 铁 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2256", "content": "一 架飞机 以 每 小时 500 千米 的 速度 ， 由 甲地 飞往 乙地 用 了 3 小时 ， 返回 时 只用 了 2 小时 ， 这 架飞机 的 往返 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9587", "content": "计算 ： （ (4/3) - (15/36) + (9/20) - (7/12) ） - (11/30) + (13/42) = ．", "knowledge": ["+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "22517", "content": "4 张 课桌 的 价钱 可以 买 5 把 椅子 ， 每 把 椅子 40 元 ， 每张 桌子 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2510", "content": "在 一个 比例 中 ， 两个 内 项 分别 是 12 和 4 ， 其中 一个 外 项 是 8 ， 另 一个 外 项 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9415", "content": "比 18 的 20% 多 0.35 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18630", "content": "一 块 12 公顷 的 土地 ， 其中 (2/3) 种 茄子 ， (1/4) 种 黄瓜 ， 其余 种 西红柿 ， 种 西红柿 的 地 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12948", "content": "学校 买来 160 盆花 ， 放在 大礼堂 28 盆 ． 剩下 的 花 分给 22 个 班 ， 平均 每班 分 到 几盆 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4328", "content": "小 东 的 体重 是 23 千克 ， 爸爸 的 体重 比 小 东 的 3 倍 还 多 2 千克 ， 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7726", "content": "红利 服装厂 第一 车间 生产 服装 265 套 ， 第 二 车间 生产 服装 347 套 ， 准备 6 套 服装 装 一袋 ， 可以 装 几袋 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10353", "content": "小 华 读 一 本书 ， 第一天 读 了 全书 的 15% ， 第 二 天 读 了 全书 的 20% ， 两天 共 读 了 70 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11922", "content": "圆柱 的 底 面积 是 (3/7) 平方分米 ， 高 是 (2/3) 分 米 ， 它 的 体积 = 多少 立方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8432", "content": "做 一节 底面 直径 为 10 分 米 ， 长 40 分 米 的 烟筒 ， 至少 需要 多少 平方分米 铁片 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10401", "content": "王 红 将 一条 毛线 剪成 8 小 根 ， 需 剪 多少 次 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20775", "content": "13.5 是 0.03 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10777", "content": "在 一次 跳远 达标 测试 中 ， 有 4 人 未达标 ， 达标率 是 98% ． 参加 跳远 达标 测试 的 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20759", "content": "一 辆 客车 以 每 小时 行 85 千米 的 速度 从 甲地 开往 乙地 ， 另 一列 货车 同时 以 每 小时 行 60 千米 的 速度 从 乙地 开往 甲地 ． 在 两辆车 相遇 前 的 1 小时 ， 它们 相距 多少 千米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "454", "content": "金 湖 人民 修建 的 “ 金 宝 南线 ” 起 于 331 省 道 金马 公路 ， 止 于 京沪 高速公路 界首 段 ． 第一期 修 了 全长 的 (1/2) ， 第 二 期 修 了 全长 的 25% ， 还 剩 12.5 千米 没有 修 ． 金 宝 南线 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14931", "content": "一 列 火车 有 10 节车厢 ， 每 节车厢 有 118 个 座位 ， 车上 的 旅客 只 坐满 了 8 节节 厢 ， 还 剩 多少 个 座位 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8547", "content": "18 箱 蜜蜂 一年 可以 酿 蜂蜜 990 千克 ， 丽丽 家养 了 这样 的 蜜蜂 6 箱 ， 一年 可以 酿蜜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3891", "content": "六年级 一班 有 50 人 ， 喜欢 小品 文艺节目 占 全班 的 10% ， 喜欢 小品 文艺节目 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22004", "content": "两列 火车 同时 从 两地 相对 开出 ． 甲 车 每 小时 行 62 千米 ， 乙 车 每 小时 行 70 千米 ， 经过 (2/3) 小时 两车 相遇 ． 两地 间 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2557", "content": "4 （ 1 ） 班 有 50 人 ， 一次 数学 测验 ， 前 15 名 同学 的 平均分 比 全班 平均分 高 7 分 ， 那么 其余 35 名 同学 的 平均分 比 全班 的 平均分 低 多少 分 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18264", "content": "101 路 公交车 到 炎黄 广场 时 ， 有 8 名 乘客 下车 ， 又 有 14 人 上车 ， 这时 车上 的 乘客 比 原来 多 30% ． 原来 车上 有 乘客 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15293", "content": "学校 三年级 有 学生 80 名 ， 四年级 比 三年级 多 20 名 同学 ， 两个 年级 共有 （ 多少 ） 名 同学 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13497", "content": "一 只 大桶 能 装 4.5 千克 油 ， 一只 小桶 能 装 2.5 千克 油 ， 40 只 大 桶装 的 油 如果 用 小桶 来 装 ， 需要 多少 只 小桶 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "462", "content": "学校 有 教师 45 人 ， 学生 的 人数 比 教师 人数 的 14 倍 多 28 人 ， 学校 有 学生 和 教师 一共 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5516", "content": "学校 里 组织 兴趣小组 ， 合唱队 的 人数 是 器 乐队 人数 的 3 倍 ， 舞蹈队 的 人数 比 器 乐队 少 8 人 ， 舞蹈队 有 24 人 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20170", "content": "一 列 火车 3 小时 行驶 294 千米 ， 从 北京 到 上海 需要 行驶 15 小时 ， 从 北京 到 上海 的 距离 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14677", "content": "我国 淡水鱼 种类 大约 有 700 种 ， 比 海洋 鱼类 少 1300 种 ， 我国 淡水鱼 的 种类 相当于 海洋 鱼 种类 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16679", "content": "刘 强 的 爸爸 上个月 的 应 纳税 所得额 为 600 元 ， 如果 按 3% 的 税率 缴纳 个人所得税 ， 应纳 个人所得税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20282", "content": "某市 乘坐 公交车 每次 投币 2 元 ， 如果 刷 公交 卡 ， 则 每次 扣 费 1.8 元 ， 刷 公交 卡比 投币 便宜 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1325", "content": "男生 比 女生 人数 多 20% ， 男生 人数 是 女生 人数 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15339", "content": "小强 看 一本 科技 书 ， 第一天 看 了 20 页 ， 第 二 天 看 了 25 页 ， 两天 正好 看 了 全书 的 (3/5) ． 这本 科技 书 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18969", "content": "一 台 步步高 vcd 降价 (1/7) 后 ， 现在 每 台 售价 780 元 ， 降低 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5445", "content": "一 列 客车 (1/2) 小时 行 了 26 干 米 ， 一列 货车 (5/3) 小时 行 了 75 千米 ． 客车 比 火车 平均 每 小时 快 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14893", "content": "小 红 家 新 购置 了 3 件 家用电器 ， 共 花掉 3650 元 ， 其中 买 电视机 用 去 2355 元 ， 买 dvd 机 用 去 了 880 元 ， 买 饮水机 用 去 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21473", "content": "一 个 圆形 广场 的 周围 栽 了 48 棵 树 ， 相邻 两棵树 之间 的 距离 是 5 米 ， 这个 广场 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6039", "content": "光明 小学 六年级 有 学生 360 人 ， 其中 女生 占 (7/12) ， 后来 又 转 来 了 几名 女生 ， 这样 女生 占 六年级 总 人数 的 (3/5) ， 转 来 的 女生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "145", "content": "6 （ 1 ） 班 共有 学生 63 人 ， 其中 男生 人数 是 女生 人数 的 (4/5) ， 女生 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13533", "content": "甲乙 两 人 同时 从 相距 36 千米 的 a 、 b 两城 同 向 而 行 ， 乙 在 前 甲 在 后 ， 甲 每 小时 行 15 千米 ， 乙 每 小时 行 6 千米 ． 几小时 后 甲 可 追 上 乙 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15298", "content": "一 辆 汽车 在 山区 行驶 ， 上山 用 了 3 小时 ， 平均 每 小时 行 30 千米 ， 下山 原 路 返回 ， 只用 了 2 小时 ， 求 这辆 汽车 上山 、 下山 的 平均速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1388", "content": "a 和 b 的 最大 公因数 是 3 ， 最小 公倍数 是 60 ， 如果 a 是 15 ， 那么 b = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10656", "content": "一 件 大衣 原价 180 元 ， 现在 降价 (1/6) ， 现在 比 原来 便宜 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15855", "content": "一 辆 自行车 从 甲地 到 乙地 ， 行 了 全程 的 (5/6) ， 还要 行 全程 的 几分 之 几 ， 就 到达 乙地 了 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21754", "content": "一 个数 的 50% 等于 32 的 18 倍 ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8754", "content": "沪宁 高速公路 全长约 270 千米 ， 一辆 轿车 以 96 千米 / 时 的 速度 从 上海 开往 南京 ， 已经 行驶 126 千米 ， 还 需要 多少 小时 到达 南京 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18719", "content": "小 冬 的 体重 是 33.12 千克 ， 小民 比 小 冬 轻 2.15 千克 ， 盼 盼 比 小民 重 3.8 千克 ． 盼 盼 的 体重 = 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19948", "content": "一 副 乒乓球拍 26 元 ， 一个 乒乓球 2 元 ， 用 50 元 钱 买 一副 乒乓球拍 ， 剩下 的 钱 还 能 买 几个 乒乓球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9584", "content": "一 个 车间 有 200 人 ， 今天 出勤 96% ， 缺勤 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18368", "content": "一 台 录音机 原价 220 元 ， 国庆节 期间 打 0.85 出售 ， 能 便宜 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8007", "content": "新建 一栋 教学楼 ， 原 计划 投资 30 万元 ， 实际 节约 了 (1/12) ． 求 实际 比 原 计划 节约 了 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20844", "content": "王 阿姨 付给 售货员 50 元 ， 买 了 5 双 袜子 ， 找回 31 元 ， 每 双 袜子 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17035", "content": "有 3 件 上衣 、 2 条 裤子 ， 要 配成 一套 衣服 有 多少 种 不同 的 配法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13594", "content": "（ 3 ） 班 有 35 人 ， 许多 同学 参加 了 课外 小组 ． 参加 美术组 的 有 20 人 ， 参加 武术 组 的 有 22 人 ， 两个 组 都 没有 参加 的 有 6 人 ． 既 参加 美术组 又 参加 武术 组 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2495", "content": "一 个数 乘 2 得 100 ， 这个 数 乘 6 得 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11247", "content": "一 间 会议室 长 8 m ， 宽 6.5 m ， 用 边长 0.5 m 的 正方形 瓷砖 给 这 会议室 铺上 地面 ， 大约 要 用 瓷砖 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22577", "content": "多少 公顷 的 25% 是 20 公顷 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13894", "content": "把 一个 边长 4 分 米 的 正方形 木条 框 拉 成 一个 平行四边形 ， 这个 平行四边形 的 周长 = 多少 分 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4862", "content": "一 个 等腰三角 形 的 周长 是 48 cm ， 相邻 两边 之 比 是 2 ： 5 ， 这个 三角形 底边 长 多少 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17924", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 的 37.5% ， 离 乙地 还有 135 千米 ． 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18753", "content": "妈妈 带 600 元 钱 去 商场 ， 买 了 一件 羊毛衫 用 去 248 元 ， 又 买 了 一个 皮包 用 去 252 元 ， 应 找回 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12461", "content": "全校 人数 的 (3/7) 是 360 人 ， 全校 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3029", "content": "叔叔 养 了 8 笼 鸽子 ， 每个 笼子 里 有 12 只 鸽子 ， 如果 每天 卖出 4 只 ， 几天 可以 卖完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20690", "content": "一 种 报纸 进价 每份 0.3 元 ， 零售价 每份 0.5 元 ， 军 军 星期天 卖 这种 报纸 赚 了 40 元 ， 军 军 卖 了 多少 份 这种 报纸 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20106", "content": "96587 + 79658 + 87965 + 58796 + 65879 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "10708", "content": "男生 是 40 人 ， 女生 是 男生 的 80% ， 女生 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7687", "content": "某 市场 运 来 苹果 、 梨 共 210 千克 ， 苹果 和 梨 的 比 是 3 ： 4 ， 梨 吃 了 (2/5) ， 还 剩 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12512", "content": "从 甲 到 乙 ， 每 小时 行 20 千米 ， 从 原 路 返回 ， 每 小时 行 30 千米 ， 往返 甲乙 的 平均速度 是 每 小时 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18947", "content": "一 种 绿色 冰箱 ， 原价 每 台 3840 元 ， 先 提价 (1/10) 后 ， 又 降价 (1/8) ， 现价 = 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7583", "content": "一 张 课桌 的 价格 是 238 元 ， 一把 椅子 的 价格 是 62 元 ． 学校 要 买 67 套 这样 的 课桌椅 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22303", "content": "果园 里 有 杏树 24 棵 ， 梨树 的 棵 数 是 杏树 的 (1/3) ， 又 是 苹果树 的 棵 数 的 (4/5) ． 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9892", "content": "376 + 385 + 391 + 380 + 377 + 389 + 383 + 374 + 366 + 378 = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "8703", "content": "多少 / 6 = 5 … 3 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15874", "content": "某校 高年级 有 女生 84 人 ， 排练 团体操 时 ， 从 女生 中 抽 选出 60 名 ， 从 男生 中 抽选 了 (2/3) ， 这时 余下 的 男生女生 人数 相等 ， 这个 学校 高年级 有 男生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6853", "content": "同学 们 做 了 80 朵花 ， 每 5 朵 扎成 一束 ， 已经 扎 了 9 束 ， 还 能 再 扎 多少 束 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18229", "content": "小 明 收集 了 285 枚 邮票 ， 是 小 华 收集 邮票 枚 数 的 3 倍 ， 小 明 收集 的 邮票 比 小 华 多 多少 枚 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10120", "content": "马路 的 一边 有 20 盏 路灯 ， 每 两盏 路灯 中间 有 一个 广告牌 ． 一共 有 多少 个 广告牌 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1306", "content": "甲 、 乙 两筐 水果 ， 甲 筐 水果 重 90 千克 ， 甲 筐 用 去 (1/3) ， 乙 筐 用 去 (1/4) ， 两筐 剩下 的 质量 一样 重 ， 乙 筐 水果 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15659", "content": "某 车间 有 3 个 小组 ， 甲组 生产 了 120 个 零件 ， 乙组 生产 的 零件 数 是 甲组 的 (5/4) ， 丙 组 生产 的 零件 数 是 乙组 的 (5/6) ． 丙 组 生产 了 多少 个 零件 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22908", "content": "修路 队 修 一条 公路 ， 第一天 修 了 全长 的 (1/15) 多 2 km ， 第 二 天 修 了 全长 的 (1/10) 少 6 km ， 还 剩 124 km ， 这 条 公路 全长 多少 km ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12964", "content": "一 堆 货物 有 184 吨 ， 用 4 辆 汽车 运走 一部分 货物 后 ， 还 剩 20 吨 货物 ， 平均 每辆 汽车 运货 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9851", "content": "完成 一项 工程 ， 甲 单独 做 需要 8 天 ， 乙 2 天 完成 工程 的 (1/5) ． 甲乙 两队 合作 几天 完成 这项 工程 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8783", "content": "徒弟 8 小时 能 生产 96 个 零件 ， 师傅 的 工作效率 比 徒弟 工作效率 的 2 倍 多 4 个 ． 师傅 每 小时 能 生产 多少 个 零件 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2950", "content": "0.4 是 0.16 的 多少倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "791", "content": "仪征 人民 修建 的 沿江 高速 仪征 段 起 于 著名 席 村 土桥 ， 止 于 风景优美 青山 ． 第一期 修 了 全长 的 (1/2) ， 第 二 期 修 了 全长 的 25% ， 还 剩 2.5 千米 没有 修 ． 沿江 高速 仪征 段 公路 全长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22607", "content": "科技馆 上半年 卖出 成人 票 3.5 万张 ， 卖出 的 儿童票 张 数 是 成人 票 张 数 的 1.6 倍 ， 科技馆 上半年 卖出 的 成人 票 和 儿童票 共有 多少 万张 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17011", "content": "把 3 米 长 的 绳子 截 成 相等 的 几段 ， 截 了 5 次 ， 每 段长 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5526", "content": "一 个 畜牧 厂 养牛 200 头 ， 马 320 匹 ， 马 比 牛 多 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15823", "content": "一 个 环形 ， 外 圆 的 半径 是 5 dm ， 内 圆 的 半径 是 3 dm ， 这个 环形 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*", "-", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "15705", "content": "(3/4) 米 的 多少 是 (3/5) 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17162", "content": "一 筐 柿子 重 20 千克 ， 卖出 (1/5) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8675", "content": "0.8 与 (3/5) 的 差 除 这 两个 数 的 和 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11844", "content": "某 地区 总面积 8000 平方千米 ， 有 240 平方千米 的 森林区 ， 这个 地区 的 森林 覆盖率 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5707", "content": "工人 加工 一批 零件 ， 10 分钟 做 了 25 个 ， 平均 每 做 1 个 零件 需要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1482", "content": "一 桶 油 第一天 用 去 40% ， 第 二 天 用 去 10 千克 ， 还 剩下 (1/2) ． 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3246", "content": "一 本书 看 了 的 和 未 看 的 页数 的 比 是 5 ： 3 ， 已经 看 了 的 是 25 页 ， 这 本书 一共 多少 页 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4708", "content": "用 一个 底面 为 边长 8 厘米 的 正方形 ， 高 为 16 厘米 的 长方体 容器 ， 测量 一个 铅锤 的 体积 ， 容器 中 装 的 水 距 容器 口 还有 2 厘米 ． 当 铅垂 放入 容器 中 ， 有 部分 水 溢出 ； 当 把 铅锤 取出 后 ， 水面 比 原来 下降 了 5 厘米 ． 这个 铅锤 的 体积 = 多少 立方厘米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6835", "content": "张 大爷 家养 了 64 只 鸡 ， 一个 星期 共生 蛋 512 只 ， 平均 每 只 鸡 一个 星期 可 生蛋 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22730", "content": "一 根 绳子 长 (9/10) 米 ， 第一次 剪 去 (1/5) 米 ， 第 二 次 比 第一次 多 剪 去 (1/10) 米 ， 问 现在 还 剩下 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "792", "content": "粮店 有 一批 大米 ， 卖出 40% 后 ， 还 剩 360 千克 ． 粮店 原来 有 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10128", "content": "1 千克 的 多少 和 3 千克 的 (1/4) 相等 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15506", "content": "果园 里 有 300 棵 桃树 ， 苹果树 的 棵 树 是 桃树 的 5 倍 ， 果园 里 桃树 和 苹果树 一共 有 多少 课 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5534", "content": "4 台 电子计算机 5 秒 可以 完成 1.7 亿次 计算 ， 每 台 电子计算机 每秒 可以 完成 多少 亿次 计算 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20792", "content": "一 瓶 540 毫升 的 纯净水 可以 倒 满 3 杯 ， 婷婷 一天 大约 要 喝 这样 的 5 杯水 ． 婷婷 一天 大约 喝 多少 毫升 水 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17786", "content": "学校 合唱队 有 女生 36 人 ， 比 男生 少 25% ， 这个 合唱队 有 男生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20870", "content": "一 根 电线 长 30 米 ， 第一次 剪 去 4.8 米 ， 第 二 次 剪 去 15.2 米 ， 这样 和 原来 相比 ， 短 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8608", "content": "工程队 修 一条 水渠 ， 第一天 修 了 全长 的 (1/3) ， 第 二 天 修 了 30 米 ， 两天 共 修 了 全长 的 (1/2) ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20697", "content": "有 浓度 为 8% 的 盐水 200 克 ， 需 稀释 成 浓度 为 5% 的 盐水 ， 需 加水 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13914", "content": "林 大伯 家 养鸡 48 只 ， 养鸭 的 只 数 比 鸡 少 (1/6) ， 鸭 比 鸡 少 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2356", "content": "张 大伯 在 超市 买 了 3 把 椅子 ， 付给 营业员 100 元 ， 找回 了 7 元 ， 平均 每 把 椅子 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9140", "content": "一 根 绳子 ， 剪 去 (1/4) 后 ， 短 了 5 米 ． 这根 绳子 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13469", "content": "客车 从 甲地 开往 开 乙地 ， 货车 从 乙地 开往 甲地 ， 每 小时 客车 比 货车 多 得 12 千米 ， 经过 4 小时 相遇 ． 相遇 后 ， 两车 继续 按 原 方向 前进 ， 又 经过 3 小时 客车 到达 乙地 ， 这时 货车 离 乙地 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4217", "content": "一 个 书包 原价 120 元 ， 现在 商场 打 0.8 出售 ， 这个 书包 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8580", "content": "一 匹 布 ， 第一次 用 去 全长 的 12% ， 第 二 次 用 去 全长 的 38% ， 还 剩 40 米 ． 这 匹 布 原有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5953", "content": "2 种 不同 的 饼干 和 4 种 不同 的 饮料 ， 如果 只 取 一种 饼干 和 一种 饮料 ， 可以 有 多少 种 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19724", "content": "篮球 每个 98 元 ， 每个 篮球 比 足球 贵 (2/7) ， 每个 足球 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22373", "content": "王 伟 上 月 的 工资 为 2200 元 ， 扣除 800 元 后 按 5% 的 税率 缴 个人所得税 ， 他 应 缴税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2830", "content": "a * b = 234 时 ， 如果 a 不变 ， b 缩小 2 倍 ， 则 积 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16957", "content": "一 个数 除以 4 ， 商 是 112 ， 余数 是 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4532", "content": "3 个 小朋友 (1/5) 小时 割草 (2/9) 千克 ， 平均 每个 小朋友 每 小时 割草 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9782", "content": "某 化肥厂 去年 生产 化肥 5000 吨 ， 今年 生产 化肥 7000 吨 ， 今年 比 去年 多 生产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4576", "content": "叔叔 去 爬山 ， 上山 每 小时 行 2.2 千米 ， 2.5 小时 到达 山顶 ． 下山 时 每 小时 走 4 千米 ， 下山 要 用 多少 小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "862", "content": "巧克力糖 每千克 售价 30 元 ， 奶糖 每千克 售价 18 元 ． 奶糖 的 售价 比 巧克力糖 低 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13499", "content": "一 个人 血液 占 体重 的 (1/13) ． 小 明 体重 52 千克 ， 体内 血液 约 有 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17308", "content": "某 车间 计划 16 天 生产 2400 个 零件 ， 实际 每天 多 生产 10 个 ， 实际 多少 天 可以 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1221", "content": "小 明 读 一 本书 ， 第一天 读 了 这 本书 的 (1/3) ， 第 二 天 读 了 这 本书 的 (1/2) ， 第 3 天 读完 剩下 的 10 页 ． 这 本书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4320", "content": "(99/100) 里面 有 多少 个 (1/100) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13570", "content": "一 项 水利工程 ， 实际 用 了 1200 万元 ， 比 计划 节约 了 20% ， 比 计划 节约 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3005", "content": "一 个 班 有 48 人 ． 班主任 问 ： “ 谁 做 完 了 语文 作业 ？ ” 这时 有 37 人 举手 ． 又 问 ： “ 谁 做 完 了 数学 作业 ？ ” 这时 有 42 人 举手 ． 最后 问 ： “ 谁 语文 、 数学 作业 都 没 做 完 ？ ” 没有 人 举手 ． 请 你 算 一 算 ， 这个 班 语 、 数 作业 都 做 完 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11543", "content": "一 份 稿件 ， 打印 了 它 的 60% 后 ， 还有 2400 字 没 打 完 ， 这份 稿件 共有 多少 字 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21267", "content": "一 种 风衣 现价 每件 360 元 ， 比 原价 降低 了 25% ， 原价 每件 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8541", "content": "一 个 足球 要 32 元 ， 一个 排球 要 18 元 ， 学校 买 了 8 个 足球 和 6 个 排球 ， 一共 要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14495", "content": "某 方便面 广告语 ： “ 增量 25% ， 加 量 不 加价 ． ” 一袋 方便面 原来 的 重量 是 100 克 ， 现在 增量 后 有 多少 克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8343", "content": "一 种 录像机 ， 原价 4800 元 ， 现价 3120 元 ， 现价 相当于 原价 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10974", "content": "一 座 大桥 长 1200 米 ， 一列 火车 通过 大桥 时 每分钟 行 380 米 ， 从 火车头 开 上 桥 到 火车 尾 离开 桥 共 需要 4 分钟 ． 这 列 火车 车身 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11091", "content": "甲 、 乙 两车 分别 从 a 、 b 两站 同时 相对 开出 ， 甲 车 与 乙 车 的 速度 比 是 3 ： 2 ． 甲 车 行驶 6 小时 到达 b 站 ， 乙 车 行驶 多少 小时 可以 到 a 站 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19693", "content": "一 条 公路 全长 400 米 ， 已修 320 米 ． 已修 全长 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7038", "content": "5.4 比 一个 数 的 2 倍 少 0.7 ， 这个 数 是 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6942", "content": "饲养 小组 养 灰 兔 75 只 ， 是 白兔 的 5 倍 ． 这个 饲养 小组 共养 兔 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10840", "content": "(1/152) + (1/304) + (1/608) + (1/1216) + (1/2432) = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "19441", "content": "用 载重 为 3.5 吨 的 货车 5 辆 ， 运 122.5 吨 货物 ， 要 几次 运 完 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5385", "content": "每支 钢笔 6 元 钱 ， 每 本 练习本 3 元 ， 东东 买 了 4 支 钢笔 和 1 本 练习本 ， 东东 买 钢笔 用 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18623", "content": "珥 陵 中心校 图书馆 门厅 有 5 根 完全相同 的 圆柱体 柱子 ， 这些 柱子 的 周长 是 6.28 米 、 高 3.2 米 ， 要 把 它们 全部 刷 上 油漆 ， 油漆 部分 的 总面积 = 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2736", "content": "学校 参加 数学 兴趣小组 的 有 45 人 ， 参加 计算机 兴趣小组 的 有 68 人 ． 既 参加 数学 兴趣小组 又 参加 计算机 兴趣小组 的 有 15 人 ， 参加 这 两个 兴趣小组 的 同学 共有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2425", "content": "国家一级 保护 动物 野生 丹顶鹤 ， 2001 年 全世界 约 有 2000 只 ， 我国 占 其中 的 (1/4) ， 其它 国家 约 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16594", "content": "树 台 小学 回族 学生 有 1100 人 ， 回族 学生 人数 与 汉族 学生 人数 的 比 是 11 ： 2 ， 树 台 小学 有 汉族 同学 多少 名 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21652", "content": "一 件 衣服 降价 20% 后 是 200 元 ， 这件 衣服 降价 前 售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21215", "content": "一 台 拖拉机 2 小时 耕地 (5/8) 公顷 ， 照 这样 计算 ， 3 台 拖拉机 (4/5) 小时 能 耕地 多少 公顷 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13986", "content": "小 红 从 家 到 学校 ， 行 到 全程 的 (8/9) 处 是 邮局 ； 她 从 学校 往 家 走 ， 行 到 全程 的 (1/3) 的 地方 距 邮局 0.42 千米 ， 小 红 家 距 学校 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21656", "content": "湖边 种 着 一排 柳树 ， 每 两棵树 之间 相距 6 米 ， 小 明 从 第 1 棵 树 跑 到 第 10 棵 树 ， 一共 跑 了 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17013", "content": "妈妈 从 水果店 买 回 2.5 千克 苹果 和 3 千克 香蕉 ． 已知 苹果 每千克 12 元 ， 香蕉 每千克 6.8 元 ． 妈妈 买 这 两种 水果 共 花 了 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11359", "content": "一 个数 的 6 倍 是 72 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21248", "content": "小 明 家 去年 养鸡 300 只 ， 今年 比 去年 养 的 3 倍 多 50 只 ， 今年 养鸡 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "453", "content": "湖边 有 灰鹤 80 只 ， 是 白鹤 只 数 的 4 倍 ， 白鹤 、 灰鹤 共有 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18125", "content": "果园 里 有 98 棵 桃树 ， 还有 8 行 杏树 ． 已知 杏树 比 桃树 多 22 棵 ， 那么 平均 每行 杏树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11444", "content": "计算 ： 8 - 9 + 10 - 11 + 26 - 41 + 42 = ．", "knowledge": ["+", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "2060", "content": "图书室 新 进 一批 新书 ， 其中 故事书 占 (1/6) ， 其余 是 连环画 和 文艺 书 ， 连环画 和 文艺 书 的 比 是 3 ： 4 ， 己 知 文艺 书 有 400 本 ， 这 批 新书 共有 多少 本 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10783", "content": "把 4 块 月饼 平均 分给 5 个人 ， 每人 分 得 多少 块 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1121", "content": "一 列 火车 3 小时 行驶 384 千米 ， 以 这样 的 速度 ， 从 北京 到 成都 的 铁路 长 2048 千米 ， 大约 要 行驶 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17246", "content": "甲 数 是 176 ， 比 乙 数 少 42 ， 甲乙 两 数 和 = ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15908", "content": "5 一班 有 45 人 ， 其中 有 20 人 参加 了 球类运动 ， 10 人 参加 了 田径运动 ， 只有 3 人 及 参加 了 球类运动 又 参加 了 田径运动 ， 那么 ， 没有 参加 这 两种 运动 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14164", "content": "为 “ 希望 小学 ” 捐款 ， 五年级 共 捐款 240 元 ， 占 全校 捐款 总数 的 (1/4) ， 四年级 捐款 数 占 全校 捐款 总数 的 (1/6) ． 四年级 捐款 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13098", "content": "每年 4 月 23 日 是 “ 世界 读书 日 ” ， 知识 书城 所有 图书 0.9 优惠 ， 小涵 买 了 一本 原价 35 元 的 《 海底 探秘 》 和 一本 原价 45 元 的 《 世界 神秘 之 旅 》 ， 小涵 实际 用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15590", "content": "商店 购进 大米 和 黄米 各 500 千克 ， 大米 的 批发价 是 每千克 4.67 元 ， 黄米 的 批发价 是 每千克 4.33 元 ． 购进 这 批 大米 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14434", "content": "水果店 李 大伯 带 2000 元 钱 去 批发市场 买 苹果 ， 买 了 25 箱 ， 还 剩 150 元 ． 每箱 苹果 的 批发价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7664", "content": "燕子 的 飞行速度 大约 是 每 小时 39 千米 ， 飞行 (5/13) 小时 ， 飞行 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11164", "content": "小 明 家 有 120 只 鸡 ， 是 鸭 的 3 倍 ， 鸡 的 只 数 比 鸭 多 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13152", "content": "六年级 一班 有 男生 30 人 ， 女生 比 男生 多 (1/3) ， 有 女生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9227", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 30 千米 ， 开出 5 小时 后 ， 离 乙地 还有 全程 的 (1/3) ， 甲地 到 乙地 公路 长 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4064", "content": "48 的 (5/8) + (7/9) / (7/3) 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13434", "content": "爸爸 的 工资 是 4800 元 ， 超过 3500 元 的 部分 要 缴纳 个人所得税 ， 税率 是 5% ， 爸爸 要 缴 多少 税款 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2789", "content": "甲 数 比 乙 数 的 50% 少 1.5 ， 甲 数 是 3.3 ， 乙 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11542", "content": "小 东 从 家 走 到 学校 要 20 分钟 ， 他 步行 的 速度 大约 是 55 米 / 分 ， 小 东家 离 学校 大约 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16526", "content": "7890 比 24 个 75 多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12738", "content": "医生 给 爷爷 开 了 一瓶 药 ， 药瓶 标签 上 写 着 “ 0.2 mg （ 毫克 ） * 252 片 ” ． 医生 开 的 处方 上 写 着 ： “ 每天 3 次 ， 每次 0.6 mg ， 7 天 为 一个 疗程 ． ” 医生 给 爷爷 开 的 药 可 供 爷爷 服 几个 疗程 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21740", "content": "小 红 和 小 明 比赛 口 算 ． 小 红 2 分钟 计算 了 24 道 题 ． 小 明说 ： “ 看来 我 的 计算速度 要 比 你 快 25% ． ” 小 明 每分钟 口 算 多少 道 题 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15087", "content": "体育老师 买 了 3 个 排球 ， 每个 40 元 ； 还 买 了 5 个 篮球 ， 每个 62 元 ， 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9222", "content": "刘 杉 今年 12 岁 ， 体重 为 36 千克 ， 属于 超重 儿童 ． 她 加入 一个 健康 俱乐部 ， 平均 每个 星期 体重减轻 了 0.8 千克 ， 6 个 星期 过去 了 ， 请问 李 林 现在 的 体重 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17949", "content": "东风 电子厂 去年 生产 录音机 40 万台 ， 上半年 生产 了 (5/6) ． 上半年 生产 多少 台 录音机 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15061", "content": "有 含盐 20% 的 盐水 16 千克 ， 要 配成 含盐 8% 的 盐水 ， 需要 加入 多少 千克 水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18754", "content": "工人 叔叔 修 一条 长 4500 米 的 路 ， 已经 修 了 24 天 ， 平均 每天 修 160 米 ， 还 剩下 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18472", "content": "植树节 时 同学 们 去 种树 ， 种 了 7 行 ， 每行 9 棵 ， 结果 死 了 4 棵 ， 成活 了 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10543", "content": "学校 组织 三年级 同学 参观 上海 世博园 区 ， 租 了 6 辆 客车 ， 规定 每辆 客车 乘坐 50 人 ． 等 同学 们 全部 上车 后 ， 老师 发现 每辆车 还有 3 个 空座位 ， 一共 有 多少 同学 去 参观 上海 世博园 区 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13454", "content": "参加 数学 竞赛 的 男生 有 40 人 ， 比 女生 多 (3/5) ． 参加 数学 竞赛 的 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4208", "content": "光明 小学 有 男生 368 人 ， 女生 287 人 ， 已经 检查 身体 的 有 395 人 ， 还有 多少 人 没有 检查 身体 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17234", "content": "同学 们 做 口头 题 ， 东东 做 对 了 全部 题目 的 90% ， 恰好 是 180 道 ， 丁丁 的 正确率 是 92% ， 丁丁 做 对 了 几道 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7434", "content": "8 支 篮球队 参加 淘汰 比赛 决出 冠军 ， 一共 要 比赛 多少 场 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20508", "content": "1.68 与 0.72 的 差 乘 0.25 ， 所得 的 积 除以 2.4 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4816", "content": "化工厂 要 生产 一批 化肥 ， 原 计划 每天 生产 0.65 t ， 10 天 完成 任务 ， 现在 已经 生产 了 2.18 t ， 其余 的 如果 每天 生产 0.48 t ， 剩下 的 化肥 还 需要 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19745", "content": "6 （ 2 ） 班 有 男生 25 人 ， 是 女生 人数 的 (5/7) ， 全班 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1709", "content": "食堂 里 原来 有 青菜 300 千克 ， 吃 了 5 天 后 还 剩下 55 千克 ， 平均 每天 吃 多少 千克 ？ （ 列 综合 算式 解答 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9232", "content": "2012 * 20122012 - 2011 * 20122013 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21083", "content": "小 明 和 小 华 一起 清点 盒子 里 的 画片 ． 小 明 比 小 华 的 动作 快 ， 小 明 数 6 张 得 时间 小 华 只能 数 4 张 ． 小 华 数 到 48 张 时 忘 了 数 的 数 = ， 只好 从 头数 起 ， 当 他 数 到 112 张 时 ， 盒子 里 只 剩下 1 张 画片 ． 盒子 里 原来 有 多少 张 画片 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "10343", "content": "一 列 数 1 ， 5 ， 9 ， 13 ， 17 ， … 从 第 二 项 起 ， 后 项 减去 它 的 前 一项 的 差 都 相等 ， 从 左向右 数起 ， 第 多少 个数 是 197 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22919", "content": "从左往右 数 ， 强强 排 第 5 ， 从 右 往 左 数 ， 强强 排 第 8 ， 这 一排 一共 有 多少 个 小朋友 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15512", "content": "乙 数 是 160 ， 如果 减去 40 ， 正好 是 甲 数 的 4 倍 ， 求 甲 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12785", "content": "某班 女生 人数 减少 (1/3) 就 与 男生 人数 相等 ， 则 ， 女生 比 男生 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "634", "content": "宾馆 有 364 千克 大米 ， 用 了 8 天 后 还 剩 156 千克 ， 平均 每天 用 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11506", "content": "甲 数 是 426 ， 乙 数 比 甲 数 的 8 倍 多 243 ， 乙 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10213", "content": "篮球 与 足球 的 个数 比 是 7 ： 5 ， 篮球 35 个 ， 足球 有 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10823", "content": "一 个 长方体 的 水槽 可 容 水 480 吨 ． 水槽 装有 一个 进水管 和 一个 排水管 ． 单 开 进水管 8 小时 可以 把 空 池 注满 ； 单 开 排水管 6 小时 可 把 满 池水 排空 ． 两 管 齐 开 需 多少 小时 把 满 池水 排空 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11626", "content": "水果店 运 来 苹果 280 筐 ， 比 运进 的 梨 多 (3/7) ． 运进 的 梨 有 多少 筐 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4467", "content": "李师傅 改进 生产工艺 后 ， 制作 一个 零件 所用 的 时间 比 过去 缩短 了 50% ， 他 的 工作效率 提高 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13690", "content": "用 2 个 长 为 20 厘米 ， 宽 为 12 厘米 的 直角三角形 拼成 一个 长方形 ， 这个 长方形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14507", "content": "爸爸 出差 到 某地 ， 在 招待所 住 了 5 天 ， 交 住宿费 162.5 元 ． 后 因 事 延长 2 天 ， 应 补交 多少 元 住宿费 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15021", "content": "学校 合唱队 有 女生 24 人 ， 比 男生 少 25% ， 这个 合唱队 有 男生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10395", "content": "火车 行 了 全程 的 (3/5) ， 还 剩 全程 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20342", "content": "一 场 男篮 比赛 ， 中国队 以 110 ： 71 击败 黎巴嫩 队 ． 姚明 独 得 33 分 ， 朱芳雨 得 25 分 ． 姚明 比 朱芳雨 多 得 的 分数 占 总分 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "448", "content": "庆安 小学 420 人 参加 体育 达标 测试 ， 结果 有 25% 的 人 达到 优秀 ， (3/5) 的 人 合格 ， 不 合格 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "175", "content": "两艘 轮船 从 上海 和 武汉 相对 开出 ， 从 武汉 开出 的 轮船 每 小时 行 26 千米 ， 从 上海 开出 的 轮船 每 小时 行 17 千米 ， 经过 25 小时 两 船 相遇 ． 上海 到 武汉 的 航道 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19614", "content": "有 两条 各 长 30 厘米 的 纸条 ， 粘贴 在 一起 长 56 厘米 ， 粘贴 在 一起 的 部分 长 多少 厘米 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3936", "content": "兰兰 早上 去 上学 ， 她 每分钟 走 80 米 ， 走 了 15 分 种 离 学校 还有 10 米 ． 兰兰 家 离 学校 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5776", "content": "甲 、 乙 两辆 汽车 同时 从 东 、 西 两地 相对 开出 ， 甲 车 每 小时 行 56 千米 ， 乙 车 开出 3 小时 与 甲 车 相遇 ， 相遇 时 ， 乙 车 行驶 了 全程 的 (5/12) ． 东 、 西 两地 相距 多千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14944", "content": "10 与 42 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8884", "content": "修 一条 公路 ， 长 1000 米 ， 甲队 已经 修 了 这 条 路 的 (2/5) ， 剩下 的 由 乙 队 修 ， 乙 队 修 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14326", "content": "甲 、 乙 两车 同时 从 同一 地点 向 相反 的 方向 开出 ， 行驶 3.2 时 后 两车 相距 304 千米 ， 甲 车 每 时 行驶 43 千米 ， 乙 车 每 时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10291", "content": "两桶 油 共 重 (5/8) 吨 ， 甲 桶 油 重 (1/5) 吨 ， 比 乙 桶 油 轻 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16154", "content": "粮库 有 一批 稻谷 ， 第一次 运走 全部 的 80% ， 第 二 次 运走 剩下 的 65% ， 这时 还 剩下 稻谷 455 袋 ， 粮库 原有 稻谷 多少 袋 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6030", "content": "小 芸 买 3 个 排球 ， 付出 100 元 ， 找回 7 元 ， 每个 排球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7227", "content": "(2/3) 的 倒数 加上 (5/6) / (1/3) 的 商 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21620", "content": "我国 是 世界 上 最 缺水 的 国家 之一 ， 人均 淡水 资源 为 2300 立方米 ， 比 世界 人均 淡水 资源 少 75% ， 那么 世界 人均 淡水 资源 为 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4220", "content": "甲乙 两艘 轮船 同时 从 上海 出发 开往 青岛 ． 经过 18 小时 后 ， 甲 船 落 在 乙 船 后面 57.6 km ． 甲 船 每 小时 行 32.5 km ， 乙 船 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4735", "content": "快车 和 慢车 从 甲 、 乙 两地 同时 相对 开出 ， 1.4 小时 后 两车 相遇 ， 快车 每 小时 行 53 千米 ， 慢车 每 小时 行 45 千米 ， 甲 、 乙 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9009", "content": "李 阿姨 卖 水果 ， 上午 卖出 36.45 千克 ， 下午 比 上午 卖出 的 少 8.7 千克 ， 一天 共 卖出 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4540", "content": "小 辉 步行 的 速度 是 65 米 / 分 ， 他 从 家里 出发 步行 去 学校 ， 行 了 20 分钟 后 离 学校 还有 350 米 ． 从小 辉 家 到 学校 的 路程 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10110", "content": "学校 买来 一批 新书 ， 科技 书 有 200 本 ， 故事书 是 科技 书 的 5 倍 ， 两种 书 共有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22115", "content": "美术组 的 人数 是 音乐 组 的 (5/6) ， 音乐 组 的 人数 是 体育组 的 (2/3) ． 美术组 有 10 人 ， 体育组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8271", "content": "张 亮 想 买 一本 价格 为 3.90 元 的 小人书 ， 他 现有 的 钱 再 添 上 0.80 元 正好 买 一本 ， 但 他 只 买 了 一本 1.50 元 的 书 ， 他 剩下 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7085", "content": "一 堆 沙 ， 盖房 用 去 了 (2/5) ， 正好 用 去 了 4 吨 ． 这 堆 沙 共有 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8598", "content": "加工 一种 零件 ， 现在 每天 加工 1500 个 ， 比 过去 每天 多 加工 300 个 ， 现在 每天 加工 的 零件 个数 比 过去 增加 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21746", "content": "一 个 平行四边形 的 底 是 6 米 ， 高 是 底 的 (9/8) 倍 ， 高 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7852", "content": "小 刚 有 科技 读物 14 本 ， 童话故事 书 的 本书 是 科技 读物 的 (3/7) 少 1 本 ， 则 小 刚 童话故事 书 为 多少 本 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17855", "content": "一 列 火车 从 北京 开往 广州 ， 火车 行驶 了 全程 的 (5/11) 用 了 10 时 ， 从 北京 到 广州 需要 多长时间 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20197", "content": "小 红 看 一本 趣味 数学 书 ， 已经 看 了 全书 的 30% ， 还 剩下 42 页 没有 看 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21565", "content": "甲 桶 油 重 50 千克 ， 是 乙 桶 油 质量 的 (1/4) ， 乙 桶 油 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1476", "content": "学校 离 少年宫 有 980 米 ， 小 明 步行 从 学校 到 少年宫 ， 走 了 12 分钟 ， 每分钟 走 65 米 ， 他 离 少年宫 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6866", "content": "甲 、 乙 两车 从 相距 300 千米 的 两地 同时 相向 而 行 ， 2.5 小时 后 还 相距 全程 的 2.5% ， 又 甲 、 乙 两车 的 速度 比 是 5 ： 4 ， 求 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "22982", "content": "学校食堂 每周 要 用 掉 1200 双 一次性 筷子 ， 每 双 筷子 0.03 元 ， 每周 用 掉 的 筷子 一共 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22614", "content": "有 4 件 上衣 ， 3 条 裙子 ， 2 条 裤子 ， 要 选 一件 上衣 和 一条 裤子 搭配 穿 ， 共有 多少 种 不同 的 穿 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1208", "content": "学校 足球队 有 35 人 ， 篮球队 人数 是 足球队 的 (4/5) ， 又 是 排球队 的 (7/8) ． 排球队 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6473", "content": "妈妈 带 了 100 元 钱 ， 买 文具 用 去 38.25 元 ， 买 牛奶 用 去 46.50 元 ， 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "408", "content": "小 明 拿 一些 钱 到 商店 买 练习本 ， 如果 买 大 练习本 可以 买 8 本 而 无 剩余 ； 如果 买 小 练习本 可以 买 12 本 而 无 剩余 ， 已知 每个 大 练习本 比 小 练习本 贵 0.32 元 ， 小 明 有 多少 元 钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4764", "content": "商店 卖 一种 袖珍 收音机 ， 每 台 是 14.4 元 ， 现在 按 0.8 出售 ． 这种 收音机 现在 每 台 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6064", "content": "一 台 电脑 原价 4500 元 ， 现在 降价 900 元 出售 ， 降价 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7236", "content": "小 明 看 一 本书 575 页 ， 看 了 5 天 ， 平均 每天 阅读 75 页 ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18699", "content": "把 一根 (3/4) 米 的 铁丝 剪成 相等 的 小 段 ， 一共 剪 了 2 次 ， 平均 每 段 的 长 = 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14929", "content": "学校 图书 阅览室 内 看书 的 人 ， 人人 有 座位 ， 而且 是 座无虚席 ． 过 了 一会儿 ， 看书 的 人 走 了 (1/8) ， 又 新 来 了 21 人 ， 因此 座位 不够 了 ， 于是 其中 有 14 人 是 2 人 合 坐 一个 位置 ． 这个 图书 阅览室 有 多少 个 座位 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15361", "content": "淘气 的 体重 是 35 千克 ， 是 妈妈 体重 的 (5/7) ， 妈妈 的 体重 = 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10192", "content": "水果店 运 来 苹果 、 香蕉 各 8 箱 ． 苹果 每箱 25 千克 ， 香蕉 每箱 18 千克 ． 一共 运 来 水果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16384", "content": "武汉 到 广州 的 高速铁路 全长 1068 千米 ， 一列 动车 从 武汉 开往 广州 ， 行 了 全程 的 (2/3) ， 行 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2548", "content": "一 根 电线杆 埋 在 地下 的 部分 长 2 米 ， 占 全长 的 12.5% ， 这根 电杆 有 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5713", "content": "7014 - 5 * 7 * 11 * 13 = ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7234", "content": "妈妈 的 体重 是 55 千克 ， 恰好 是 爸爸 体重 的 (11/12) ， 小 刚 的 体重 正好 是 爸爸 的 50% ， 小 刚 的 体重 = 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15788", "content": "24 等于 乙 数 的 (4/5) ， 乙 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4542", "content": "小汽车 每 小时 可以 行驶 120 千米 ， 比 卡车 行驶 的 速度 快 (1/3) ， 卡车 的 速度 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21990", "content": "8 个 鸡蛋 重 (2/5) 千克 ， 平均 每个 鸡蛋 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19241", "content": "一 台 vcd 降低 价格 25 元 后 ， 售价 600 元 ， 降价 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1695", "content": "一 根 绳子 长 4 米 ， 剪 去 它 的 (1/4) ， 余下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20206", "content": "某 商场 在 一次 促销 活动 中 ， 第一天 卖出 t恤衫 54 件 ， 第 二 天 卖出 总量 的 (1/4) ， 这时 已 卖出 的 t恤 与 剩下 的 件数 比 是 4 ： 3 ， 还 剩下 t恤衫 多少 件 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "15117", "content": "在 画 条形 统计图 时 ， 用 2 厘米 长 的 直 条 表示 500 万元 ， 要 表示 2000 万元 产值 ， 直 条 应 画 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11995", "content": "工程队 修 一条 长 1600 m 的 路 ， 已修 了 40% ， 还 剩下 多少 m 没有 修 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21419", "content": "我国 幅员辽阔 ， 南北 相距 5500 km ， 南北 相距 是 东西 相距 的 (55/52) ． 东西 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5011", "content": "计算 ： (3/4) + (5/36) + (7/144) + (9/400) + (11/900) + (13/1764) + (15/3136) = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "161", "content": "食堂 运 来 一批 大米 ， 吃 了 一 星期 后 ， 剩下 的 比 吃 了 的 多 14.7 千克 ， 剩下 98.7 千克 ． 食堂 运 来 多少 千克 大米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21654", "content": "某 洗衣机 厂 第一季度 生产 洗衣机 1200 台 ， 相当于 全年 计划 的 (2/5) ， 该厂 全年 计划 生产 洗衣机 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14508", "content": "电机厂 去年 计划 生产 500 台 电动机 ， 结果 生产 了 600 台 ， 完成 了 计划 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19167", "content": "8.4 的 1.7 倍 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13155", "content": "同学 们 在 长 100 米 的 小路 一边 植树 ， 每隔 5 米 栽 一棵 （ 两端 都 要 栽 ） ， 一共 需要 多少 棵 树苗 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6117", "content": "小 宇 春 看 一本 故事书 ， 每天 看 15 页 ， 24 天 刚好 看 完 ； 如果 每天 多 看 3 页 ， 多少 天 可以 看 完 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3799", "content": "截至 5 月 11 日 ， 今年 手足 口 死亡 病例 中 宁波 比 温州 少 (5/7) ， 那么 温州 比 宁波 多 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9090", "content": "将 240 吨 煤 分成 甲 、 乙 、 丙 3 堆 ， 甲 堆 煤 比 丙 堆 煤 少 12 吨 ， 乙 、 丙 两堆 煤 的 质量 比 为 2 ： 5 ． 甲 堆 煤 有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12244", "content": "一 个 正方体 玻璃 鱼缸 ， 底面 边长 为 3 dm ， 放入 一块 石头 后 水面 升高 了 0.3 dm ， 这块 石头 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5800", "content": "19 个 战士 来到 一条 河边 准备 过河 ， 可是 河边 只有 一条 船 ， 小船 一次 最 多 只能 坐 4 个 ， （ 不 包括 船夫 ） ． 想一想 ， 小船 至少 几次 才能 将 战士 全部 运 过河 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16801", "content": "李 教练 买 了 12 个 排球 ， 每个 32 元 ， 如果 用 买 排球 的 钱 买 足球 ， 可以 买 16 个 ， 每个 足球 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7804", "content": "小 军 每天 早上 跑步 16 分钟 ， 他 的 速度 大约 是 每分钟 130 米 ． 小 军 每天 跑步 大约 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22072", "content": "某 房间 需要 粉刷 的 面积 是 105 平方米 ， 若 每平方米 需要 涂料 0.5 升 ， 在 实际 粉刷 时 有 10% 的 损耗 ． 共 需要 涂料 多少 升 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1288", "content": "有 若干辆 卡车 在 运货 ， 如果 每辆 卡车 运 3.5 吨 ， 这 批 货物 就 有 2 吨 不能 运走 ； 如果 每辆 卡车 运 4 吨 ， 运 完 这 批 货物 后 还 可以 装 1 吨 其他 货物 ． 这 批 货物 一共 有 多少 吨 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20353", "content": "夏季 高山 上 气温 从 山脚 起 每 升高 100 米 降低 0.7 摄氏度 ， 已知 山顶 气温 是 14.1 摄氏度 ， 山脚 气温 是 26 摄氏度 ， 那么 此 山 相对 山脚 的 高度 = 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8460", "content": "每箱 饮料 有 24 听 ， 每 听 3 元 ， 5 箱 共 需 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19194", "content": "一 根 铁丝 长 20 米 ， 剪 去 多少 米 后 ， 还 剩 全长 的 20% ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9857", "content": "一 个 长方体 容器 ， 里面 长 12 分 米 、 宽 10 分 米 、 水深 10.5 分 米 ， 容器 中 浸没 着 一个 小 铁块 ， 当 铁块 从 水中 取出 后 ， 水面 下降 了 0.4 分 米 ， 这个 小 铁块 的 体积 = 多少 立方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "397", "content": "一 根 钢管 长 8 米 ， 锯 成 1 米 一段 ， 如果 每 锯 一次 需要 3 分钟 ， 要 几分钟 才能 锯 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15485", "content": "一 艘 轮船 以 45 千米 / 时 的 速度 从 甲 港 驶往 乙 港 ， 6 小时 后 到达 ． 这 艘 轮船 从 乙 港 返回 甲 港 时 少 用 了 1 个 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7277", "content": "为了 筹备 元旦晚会 ， 刘老师 带 700 元 钱 到 水果 批发市场 去 买 水果 ． 他 买 了 16 箱 水果 ， 还 剩下 60 元 ． 平均 每箱 水果 的 价钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21955", "content": "黄 芳 家 到 学校 的 距离 是 600 米 ， 早上 ， 黄 芳 从 家 到 学校 ， 已 行 了 全程 的 (3/4) ， 她 现在 离 学校 有 多 远 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19671", "content": "某 蔬菜 店 运 来 一批 大蒜 ， 卖出 (2/5) ， 正好 卖 了 480 元 ， 这些 大蒜 一共 可以 卖 多少 元 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16823", "content": "金 龙 航运公司 有 26 条 船 ， 每天 收入 780 元 ， 照 这样 计算 ， 现在 30 条 船 ， 每天 一共 收入 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11560", "content": "一 种 商品 ， 原价 是 300 元 ， 经过 两次 降价 后 是 240 元 ， 已知 第一次 降价 (1/9) ， 第 二 次 降价 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "6562", "content": "一 支 圆珠笔 4.8 元 ， 相当于 一支 钢笔 价钱 的 75% ， 一支 钢笔 的 价钱 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19814", "content": "一 间 教室 的 面积 是 58.5 平方米 ， 用 边长 是 0.5 米 的 方砖 铺 地面 ， 请 你 算算 要 用 多少 方砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21961", "content": "“ 6 一 ” 儿童节 ， 学校 举行 绘画 比赛 ． 五年级 获奖作品 总数 为 48 张 ， 是 四年级 获奖 总数 的 (4/3) ， 四年级 获奖 总数 相当于 六年级 的 (4/5) ． 六年级 获奖作品 总数 = ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9099", "content": "奇奇 有 铁丝 12 米 ， 用 这些 铁丝 做 棱 长 为 (1/5) 米 的 正方体 框架 ， 可以 做 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20822", "content": "水果 批发市场 运进 3 车 苹果 ， 平均 每 车 装 64 箱 ， 平均 每箱 重 10 千克 ． 一共 运进 苹果 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7860", "content": "有 甲 、 乙 、 丙 3 个 空 量杯 ． 甲 杯 的 容量 是 (1/5) 升 ， 乙 杯 的 容量 是 (1/4) 升 ． 如果 将 甲 、 乙 两杯 都 装满水 ， 一起 倒入 丙 杯 ， 这时 ， 丙 杯中 的 水 约 占 (9/10) ． 丙 杯 的 容量 = 多少 升 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15431", "content": "一 堆 货物 ， 甲 车 运走 24 吨 ， 乙 车运 的 是 甲 车 的 (3/4) ， 乙 车运 的 是 丙 车 的 (2/3) ． 丙 车运 了 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13129", "content": "一 本书 共 160 页 ， 小 明 第一天 看 了 10% ， 第 二 天 看 了 5% ， 两天 一共 看 了 多少 页 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17501", "content": "(7/10) 除以 一个 数 ， 商 是 2 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8540", "content": "斯太尔 大 货车 从 甲地 和 夏利 牌 小轿车 从 乙地 同时 出发 相向 而 行 ， 4 小时 相遇 ， 这时 小轿车 离 甲地 有 240 千米 ， 大 货车 离 乙地 还有 480 千米 ， 照 这样 的 速度 ， 小轿车 行 完全 程 用 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14021", "content": "海洋馆 第一天 卖出 456 张 门票 ， 第 二 天 上午 卖出 187 张 ， 下午 卖出 313 张 ． 这 两天 一共 卖出 多少 张 门票 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17969", "content": "一 个 工人 要 磨 面粉 200 千克 ， 3 小时 磨 了 60 千克 ． 照 这样 计算 ， 磨 完 剩下 的 面粉 还要 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12800", "content": "学校 添置 体育用品 ， 买来 每 只 32 元 的 篮球 14 只 ， 买来 每 只 18 元 的 足球 8 只 ， 问 学校 添置 体育用品 用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17945", "content": "修 一段路 ， 如果 每天 修 42 米 ， 13 天 可以 完成 ． 修 了 4 天 后 ， 每天 多 修 6 米 ， 还要 几天 才能 完成 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6419", "content": "一 个 长方体 的 体积 是 30 立方厘米 ， 长 是 5 厘米 ， 高 是 3 厘米 ， 宽 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6435", "content": "一 个 长方形 的 一条 长 与 一条 宽 的 和 是 12 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "10592", "content": "比 的 前项 是 (3/8) ， 比值 是 (1/3) ， 比 的 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8843", "content": "两个 因数 的 积 是 630 ， 其中 一个 因数 是 21 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5762", "content": "学校 图书馆 有 270 本 故事书 ， 科技 书 的 本 数 是 故事 书本 数 的 40 倍 ， 故事书 和 科技 书 一共 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5771", "content": "一 个 比 的 比值 是 0.6 ， 它 的 前项 是 9 ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2410", "content": "一 双 皮鞋 打 0.8 后 降 了 40 元 ， 这 双 皮鞋 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10161", "content": "3 （ 1 ） 班 有 45 人 学生 ， 每人 都 报名 参加 了 科技 组 或 电脑 组 两个 兴趣小组 ． 其中 参加 科技 组 的 有 30 人 ， 参加 电脑 组 的 有 25 人 ， 两个 兴趣小组 都 参加 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2318", "content": "一 个 运输队 第一天 运货 64.5 吨 ， 比 第 二 天 的 2 倍 多 10.5 吨 ， 两天 共 运货 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20467", "content": "1.62 的 2.5 倍 + 2.4 / 1.2 的 商 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18740", "content": "用 800 个 鸡蛋 孵小鸡 ， 上午 孵 了 329 只 小鸡 ， 下午 比 上午 多 孵 了 106 只 ， 下午 孵 了 多少 只 小鸡 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9220", "content": "做 一批 玩具 ， 计划 每天 做 16 个 ， 要 35 天 ． 实际 每天 做 20 个 ， 实际 比 计划 少 用 几天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10884", "content": "一 个数 除以 28 ， 商 是 25 ， 这个 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17658", "content": "小 刚 两天 看书 30 页 ， 第一天 看 了 全书 的 (3/10) ， 第 二 天 看 了 12 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6453", "content": "海水 中 盐 的 含量 为 5% ， 在 40 千克 海水 中 ， 需 加入 多少 千克 淡水 才能 使 海水 中 盐 的 含量 为 2% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22367", "content": "亮 亮 体重 40 千克 ， 明明 比 亮 亮 重 (3/20) ， 明明 体重 多少 千克 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "86", "content": "一 款 原价 3000 元 的 空调 先后 两次 降价 ， 第一次 降价 10% ， 第 二 次 又 降价 5% ． 现在 这 款 空调 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13222", "content": "粮店 运 来 面粉 165 袋 ， 比 大米 袋 数 的 3 倍 还 多 15 袋 ， 粮店 运 来 大米 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2203", "content": "王老师 写 书 所得 稿费 2800 元 ， 按规定 ： 扣除 稿费 中 800 元 后 的 部分 按 20% 的 税率 缴纳 个人所得税 ， 那么 王老师 应 缴纳 个人所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20651", "content": "一 根 木棒 锯 成 2 段 需要 (3/4) 分钟 ， 锯 成 10 段 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "16313", "content": "1 与 一个 数 的 倒数 之 差 是 (5/6) ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17863", "content": "从 4 个 男生 ， 5 个 女生 中选 一名 班长 和 副班长 ， 共有 多少 种 不同 的 选 法 ？ （ 班长 和 副班长 必须 由 男生 和 女生 搭配 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5072", "content": "把 30 平均 分成 6 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3644", "content": "把 一堆 皮球 分装 在 4 个 盒子 里 ， 其中 (1/3) 放入 甲 盒 ， (1/5) 放 人 乙 盒 ， 放 人 丙 盒 的 皮球 是 甲 、 乙 盒 皮球 总数 的 75% ， 丁 盒 放入 4 个 皮球 ． 这 堆 皮球 一共 有 几个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2583", "content": "六年级 4 个 班 共有 学生 180 人 ， 一年级 3 个 班 共有 学生 102 人 ， 一年级 比 六年级 平均 每班 少 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20957", "content": "学校 运 来 一堆 砂子 ， 砌墙 用 去 (1/5) ， 修 操场 又 用 去 剩下 部分 的 (5/8) ， 结果 还 剩下 6 吨 ， 一 共用 去 砂子 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14133", "content": "回收 1 千克 废纸 ， 可 生产 0.9 千克 再生纸 ， 如果 每人 回收 3.5 千克 废纸 ， 200 人 回收 的 废纸 可以 生产 多少 千克 再生纸 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17244", "content": "一 个 梯形 ， 下 底 长 8 厘米 ， 如果 下 底 减少 2 厘米 ， 就 变成 了 正方形 ． 原来 这个 梯形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13828", "content": "把 245 本书 分 发给 五年级 一个班 的 同学 ， 为 保证 1 人 至少 要 发到 5 木 书 ， 这个 班 最 多 可以 有 多少 人 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1906", "content": "甲队 说 ： 我们 队 每月 修 720 米 公路 ． 乙 队 说 ： 我们 队 每月 修 800 米 公路 ． 两队 分别 同时 施工 ， 6 个 月 开通 ， 这 条 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9532", "content": "一 列 快车 从 甲地 开往 乙地 需 8 小时 ， 一列 慢车 从 乙地 开往 甲地 需 10 小时 ． 两列 火车 同时 从 甲 、 乙 两地 相对 开出 ， 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17493", "content": "小 红 有 84 张 邮票 ， 其中 (3/8) 是 中国 邮票 ， 其余 的 是 外国 邮票 ， 外国 邮票 有 多少 张 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22075", "content": "光明 拖拉机厂 前年 生产 拖拉机 480 台 ， 去年 生产 的 台数 比 前年 增加 了 (1/6) ， 今年 生产 的 台数 比 去年 增加 了 (1/8) ． 这个 厂 今年 生产 了 多少 台 拖拉机 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "7135", "content": "一 根 绳 长 的 (2/7) + (4/5) 米 正好 等于 它 本身 ， 这根 绳 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "669", "content": "盒子 里 有 红 、 白 两种 球 ， 其中 红球 有 20 个 ， 占 总数 的 (2/5) ， 那么 白 球 有 多少 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15715", "content": "希望 小学 今年 有 学生 1300 人 ， 比 去年 多 了 500 人 ， 比 去年 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22392", "content": "甲 、 乙 、 丙 3 人 ， 甲 每分钟 走 80 米 ， 乙 每分钟 走 50 米 ， 丙 每分钟 走 100 米 ． 甲 、 乙 两 人 从 a 地 出发 ， 丙 从 b 地 同时 相向 出发 ， 经 20 分钟 丙 与 甲 相遇 ． 丙 与 甲 相遇 后 ， 再 过 多少 分钟 ， 丙 与 乙 相遇 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22358", "content": "在 一块 平行四边形 的 菜地 里 种 辣椒 ， 已知 这块 菜地 的 底 是 40 米 ， 高 是 0.9 米 ， 如果 每棵 辣椒 苗 占地 0.18 平方米 ， 这块 地 可 种 辣椒 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20776", "content": "三年级 6 个 班 的 捐款 正好 能 帮助 3 名 失学 儿童 ， 400 元 可以 帮助 一名 失学 儿童 完成 小学 学业 ． 平均 每班 捐 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8982", "content": "李玉明 上 月工资 1080 元 ， 奖金 540 元 ． 夜班 补贴 120 元 ． 按 个人 所 税法 规定 ， 每月 个人收入 扣除 1000 元 后 余额 部分 ， 按 5% 的 税率 缴纳 个人所得税 ． 李玉明 上 月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10337", "content": "一 块 地 有 (5/6) 公顷 ， 其中 (1/3) 种 苦瓜 ， (3/8) 种 茄子 ， 其余 的 种 韭菜 ， 种 韭菜 的 面积 是 总面积 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10825", "content": "小 明 有 故事书 46 本 ， 小 军 比 小 明 故事 书本 数 的 2 倍 还 多 4 本 ． 小 军 有 多少 本 故事书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2003", "content": "李老师 到 电器 商城 购买 一台 彩电 ， 原价 2000 元 ， 现在 降价 200 元 ， 降低 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15331", "content": "今年 ， 北京 到 上海 的 高速铁路 正是 投入 运营 ． 一列 火车 以 时速 450 公里 从 北京 直达 上海 ， 3 小时 就 行驶 了 全程 的 (2/3) ， 按 这样 计算 ， 这 列 火车 从 北京 开出 ， 几小时 可以 到达 上海 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21924", "content": "学校 组织 同学 祭扫 烈士墓 ， 中年级 去 了 82 人 ， 高年级 去 的 人数 比 中年级 的 3 倍 多 20 人 ， 中 、 高年级 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5130", "content": "学校 每节课 的 时间 是 (2/3) 小时 ． 在 某 节 数学 课堂 上 ， 老师 讲解 用 了 (1/4) 小时 ， 同学 们 动手 操作 用 了 (1/5) 小时 ， 其余 的 时间 同学 们 合作 交流 ， 同学 们 合作 交流 的 时间 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2621", "content": "有 两列 火车 ， 一列 长 130 米 ， 每秒 行 23 米 ． 另 一列 长 250 米 ， 每秒 行 15 米 ． 现在 两车 相向 而 行 ， 从 相遇 到 离开 需 几秒钟 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13195", "content": "我校 食堂 买来 560 千克 大米 ， 6 天 吃 了 240 千克 ， 照 这样 计算 ， 剩下 的 能 吃 几天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "120", "content": "同学 们 参加 植树 活动 ， 四年级 栽 了 42 棵 ， 六年级 栽 的 棵 树 比 四年级 的 3 倍 少 18 棵 ， 四年级 比 六年级 少 栽 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14399", "content": "学校 有 一堆 砖 ， 共有 300 块 ， 要 给 学生 砌 一 盘灶 和 一个 水井 ， 砌 灶 用 了 200 块 ， 其余 的 用来 砌 水井 ， 砌 水井 的 砖 占 这 堆 砖 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21674", "content": "比 270 的 5 倍 多 28 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9393", "content": "幼儿园 买 12 包 毛巾 ， 每 包装 5 条 ， 每 条 售价 3 元 ， 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12807", "content": "刘老师 比 张老师 大 16 岁 ， 张老师 的 岁数 是 刘老师 的 (3/5) ． 张老师 多少岁 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10940", "content": "给 算式 “ 7 * 9 + 12 / 3 - 2 ” 加 一 对 括号 后 ， 算式 的 最大值 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13400", "content": "79 / 多少 = 7 … 2 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2891", "content": "一 服装厂 原来 做 衣服 ， 每套 用布 3.2 米 ， 改进 裁剪 方法 后 ， 现在 每套 节省 0.2 米 ， 原来 做 360 套 这种 服装 所用 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1063", "content": "松树 的 棵 数 比 柳树 少 (1/4) ， 松树 的 棵 数 是 柳树 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17972", "content": "一 本 故事书 有 455 页 ， 小 明 前 12 天 平均 每天 看 25 页 ， 他 打算 剩下 的 书 5 天 看 完 ， 平均 每天 他 应该 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19211", "content": "一 列 匀速 前进 的 火车 ， 从 它 进入 320 m 长 的 隧道 到 完全 通过 隧道 经历 了 60 s ， 隧道 顶 有 一盏 固定 的 灯 ， 垂直 向下 发光 ， 灯光 在 火车 上 照 了 10 s ， 则 这 列 火车 的 长 为 多少 m ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2672", "content": "(1/8) + (1/16) + (1/32) + (1/64) + (1/128) = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "13687", "content": "化肥厂 全年 计划 生产 化肥 2184 吨 ， 第一季度 就 完成 了 全年 任务 的 (5/12) ． 已知 第一季度 3 个 月 平均 每月 增产 20% ， 问 元月份 生产 了 多少 吨 化肥 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.7, "length": 17}
-{"question_id": "4157", "content": "商店 里 有 水果 50 千克 ， 卖出 30.5 千克 后 ， 又 运进 了 20.5 千克 ， 这时 商店 里 有 水果 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "987", "content": "为 迎接 新年 ， 同学 们 做 了 25 朵 红花 ， 30 朵 绿 花 ． 做 的 绿 花 比 红花 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16425", "content": "512 - 304 的 差 除以 8 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11044", "content": "学校 买来 16 只 足球 和 20 只 篮球 共 付 1732 元 ， 每 只 篮球 的 价钱 是 45 元 ， 求 每 只 足球 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2796", "content": "一 艘 客轮 从 上海 出发 开往 武汉 ， 12 小时 后 已 行 的 路程 与 还 剩 的 路程 的 比 是 3 ： 2 ． 已知 已 行 的 路程 比 还 剩 的 路程 多 220 千米 ， 从 上海 到 武汉 的 水路 长 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21667", "content": "12.8 - 4.6 ， 再 加上 25.18 ， 结果 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "708", "content": "牛肉 中 脂肪 的 含量 是 10.2% ， 500 克 牛肉 中 含有 脂肪 多少 克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7311", "content": "某种 花生 的 出油率 为 42% ， 500 千克 的 这种 花生仁 能 榨 花生油 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20812", "content": "由于 液晶 电视机 的 持续 热销 ， 导致 传统 的 显像管 电视机 价格 不断 下滑 ． 在 某 家电 商场 ， 一款 显像管 电视机 的 价格 由 4000 元 调整 为 2400 元 ， 调整 后 的 价格 是 原价 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3154", "content": "有 2 吨 煤 ， 第一次 运走 (1/4) ， 第 二 次 又 运走 (1/2) 吨 ， 这时 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21190", "content": "计算 （ 12.6 * 4 - 0.1 ） * 20 + 201 * 5 = ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "8224", "content": "为了 丰富 学生 的 业余生活 ， 学校 购买 了 一批 图书 ， 5 辆 汽车 3 次 共运 960 万册 ， 平均 每辆 汽车 每次 可 运 书 多少 册 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13800", "content": "王师傅 生产 了 5000 个 零件 ， 不 合格 的 占 3% ． 合格 零件 有 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6601", "content": "小 丽 从 家 去 书店 ， 她 先 步行 走 了 0.5 小时 ， 又 坐 公交车 0.75 小时 ， 共 行 了 30 千米 ． 如果 她 步行 速度 是 每 小时 6 千米 ， 那么 公交车 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15347", "content": "李 明 和 王 军 赛跑 ， 李 明 的 速度 是 90 米 / 分 ， 用 11 分钟 跑 到 了 终点 ， 王 军 比 他 早 2 分钟 到达 ． 王 军 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15465", "content": "海 侨 糖厂 2008 年 二 月份 计划 生产 780 吨 红糖 ， 实际 每天 生产 29 吨 ， 照 这样 的 计算 ， 这个 月 超产 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11026", "content": "7 / 56 ， 商 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20262", "content": "连续 5 个 25 相乘 的 结果 = ．", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "17619", "content": "计算 ： 8888 * 3333 + 4444 * 3334 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14795", "content": "一 组 互相 咬合 的 齿轮 ， 小齿轮 有 32 个 齿 ， 是 大 齿轮 的 (2/5) ， 大 齿轮 有 多少 个 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19792", "content": "姜堰 与 上海 的 公路 长 252 千米 ， 甲乙 两辆 大 客 同时 从 姜堰 驶往 上海 ， 甲 客车 每 小时 行 80 千米 ， 0.8 小时 后 两车 相距 16 千米 ． 乙 客车 每 小时 至少 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14089", "content": "果园 里 有 梨树 120 棵 ， 桃树 棵 数 是 梨树 的 (4/5) ， 果园 里 有 桃树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20188", "content": "校园 里 有 36 棵 柏树 ， 松树 比 柏树 多 (2/3) ， 校园 里 有 松树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18370", "content": "有 一个 除法 算式 ， 它 的 除数 是 9 ， 商 和 余数 相等 ， 被除数 最小 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "645", "content": "一 、 二 、 三年级 共有 学生 512 人 ， 一年级 学生 人数 是 二年级 的 2 倍 ， 三年级 学生 人数 是 二年级 的 5 倍 ． 你 能 算 出 二年级 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10809", "content": "100 / 1.5 与 2.6 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17529", "content": "冰箱 厂 今年 上半年 生产 冰箱 24000 台 ， 超过 计划 4000 台 ． 超额 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16223", "content": "8 只 母鸡 一个月 下蛋 168 个 ， 小 军 家 喂 了 32 只 这样 的 母鸡 ， 一个月 可以 下 多少 个 蛋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16311", "content": "有 一根 长 7.2 米 的 钢材 锯 成 每 段长 0.9 米 的 短 钢材 ， 需要 35 秒钟 ， 若 改成 锯 成 每 段长 0.8 米 的 短 钢材 ， 需要 多少 秒钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2775", "content": "超市 上旬 完成 当月 销售 计划 的 (1/5) ， 中旬 完成 当月 销售 计划 的 (7/10) ， 下旬 完成 当月 计划 的 (1/4) ． 这个 月 实际 超额完成 当月 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16666", "content": "小 明 和 小 青 在 环形 跑道 上 跑步 ， 两 人 从 同一 地点 出发 ， 反向而行 ． 小 明 每秒 跑 3 m ， 小 青 每秒 跑 5 m ． 经过 50 秒 ， 两 人 在 跑道 上 第 1 次 相遇 ， 问 ： 跑道 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15791", "content": "一 辆 汽车 从 甲地 开往 乙地 速度 是 60 千米 / 时 ， 5 小时 达到 ． 返回 时 速度 比 去 时 快 15 千米 / 时 ， 返回 时 只 需 几小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1300", "content": "一 个 游泳池 ， 长 50 米 ， 宽 12 米 ， 深 2.5 米 ． 注满 水 后 一共 可 装 水 多少 立方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3234", "content": "有 一批 货物 ， 每天 运走 它 的 (1/5) ， 多少 天 可以 运 完 这 批 货物 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19912", "content": "一 根 电线 ， 用 去 了 5.6 米 ， 比 剩下 的 多 1.25 米 ， 这根 线 原来 长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15812", "content": "已知 两个 因数 的 积 是 75.6 ， 其中 一个 因数 是 21 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2835", "content": "商店 一天 中 卖出 衣服 8 套 ， 上衣 每件 180 元 ， 裤子 每 条 125 元 ． 这 一天 商店 的 营业额 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7930", "content": "张 楠 体重 36 千克 ， 刘 青 比 张 楠 轻 2 千克 ， 她俩 体重 平均 多少 千克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22572", "content": "一 辆 汽车 从 甲地 到 乙地 ， 已 行 的 路程 与 未 行 的 路程 比 是 1 ： 3 ， 如果 再行 52 千米 ， 已 行 的 路程 是 全程 的 (5/7) ． 甲地 到 乙地 有 多 远 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "831", "content": "小 明 的 爸爸 将 上 月工资 的 80% 存 人 银行 ， 这时 还 剩下 工资 360 元 ， 小 明 爸爸 上 月 的 工资 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12338", "content": "同学 们 为 希望 小学 捐书 ， 男生 捐 了 480 本 ， 女生 捐 的 书 比 男生 的 (7/8) 还 多 10 本 ， 女生 捐 了 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21461", "content": "一 个 因数 是 50 ， 另 一个 因数 是 80 ， 它们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7247", "content": "一 堆 货物 ， 用 25 辆 汽车 来 运 ， 6 次 运 完 ， 如果 要 5 次 运 完 ， 需要 多少 辆 汽车 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17757", "content": "被除数 是 3320 ， 商 是 150 ， 余数 是 20 ， 除数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3594", "content": "红红 去 北京 参加 竞赛 ， 参加 竞赛 的 同学 为了 欢迎 她 ， 每人 都 和 她 握 了 一次 手 ， 红红 记得 握 了 10 次 ， 请问 有 多少 同学 参加 竞赛 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3552", "content": "400 - 170 与 80 的 和 ， 差 = ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9116", "content": "一 辆 汽车 (3/4) 小时 行 45 千米 ， 照 这样 计算 ， 120 千米 需 行 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20105", "content": "一 条 长 6 千米 的 公路 ， 修路 队 每天 能 修 (4/5) 千米 ， 修 了 4 天 后 还 剩下 多少 千米 没有 修 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17160", "content": "学校 买来 8 包 毛巾 ， 每包 12 条 ， 共 付 864 元 ， 每 条 毛巾 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14816", "content": "一 堆 货物 120 吨 ， 用 去 了 45 吨 ， 还 剩 总数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17232", "content": "一 个 工程队 要 修 一条 长 4340 米 的 公路 ， 已经 修 了 1860 米 ． 剩下 的 要 16 天 修 完 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18881", "content": "一 列 火车 从 甲地 开往 乙地 ， 已经 行 了 全程 的 (2/7) ， 距离 乙地 还有 245 千米 ． 甲乙 两地 之间 的 距离 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13085", "content": "一 辆 汽车 从 甲地 到 乙地 ， 每 小时 行驶 160 千米 ， 已经 行 了 12 小时 ， 离 乙地 还有 485 千米 ， 甲地 到 乙地 有 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9263", "content": "一 块 巧克力 ， 小 东 吃 了 (1/8) ， 小 红 吃 了 (3/8) ， 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1010", "content": "油桶 里 原来 有 7 千克 油 ， 又 倒进去 35 千克 油 ， 现在 油桶 里 油 的 质量 是 原来 的 几倍 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12835", "content": "甲 是 乙 的 (8/5) ， 乙 数 是 25 ， 甲 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9158", "content": "多少 和 3 互为 倒数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21036", "content": "师徒 二 人 同时 加工 一批 零件 ， 他们 的 工效 比 是 9 ： 7 ， 完成 任务 时 ， 师傅 比 徒弟 多 加工 80 个 零件 ， 这 批 零件 有 多少 个 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16062", "content": "同学 们 要 植 96 棵 树 ， 第一天 植 了 (5/12) ， 其中 (3/8) 是 六年级 植 的 ． 第一天 六年级 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20325", "content": "各 班 向 学校 图书室 借书 ， 其中 16 个 班 每班 借 54 本 ， 7 个 班 每班 借 50 本 ． 图书室 一共 借出 了 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2210", "content": "珠穆朗玛峰 的 海拔高度 为 海平面 以上 8844 m ， 吐鲁番 盆地 的 高度 为 海平面 一下 155 米 ， 则 珠穆朗玛峰 的 最高点 和 吐鲁番 盆地 的 最低点 相差 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12367", "content": "一 个 三角形 的 底 是 5 厘米 ， 高 是 底 的 2 倍 ， 那么 它 的 面积 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3872", "content": "一 个 建筑工地 运 来 水泥 570 吨 ， 是 运 来 石子 重量 的 3 倍 ． 运 来 的 石子 和 水泥 一共 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21798", "content": "从 甲地 到 乙地 ， 如果 骑 自行车 ， 每 小时 行 15 千米 ， 4 小时 到达 ． 如果 乘 汽车 ， 只 需 2 小时 ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1744", "content": "每枝 玫瑰花 1.5 元 ． 每枝 百合花 3.8 元 ． 小巧 买 了 5 枝 玫瑰 和 3 枝 百合 ， 她 一共 要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9870", "content": "红星 小学 去年 植树 300 棵 ， 成活率 是 95% ， 有 多少 棵 没有 成活 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16973", "content": "小 华 看 一本 课外书 ， 已经 看 了 全书 的 (3/4) ， 正好 是 75 页 ． 这 本书 有 多少 页 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12357", "content": "小 军 和 小 亮 在 400 米 的 环形 跑道 上 ， 从 同一 地点 相 背 出发 ， 经过 50 秒 后 两 人 第一次 相遇 ． 小 军 每秒 跑 4.5 米 ， 小 亮 每秒 跑 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7208", "content": "一 辆 汽车 上山 的 速度 是 每 小时 45 千米 ， 行走 4 小时 到达 目的地 ， 然后 从 另 一条 路 下山 ， 下山 速度 每 小时 60 千米 ， 车行 2 小时 到 山脚 ， 问 这辆 车上 下山 的 平均速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5133", "content": "商店 运 来 5 箱 热水瓶 ， 每箱 12 个 ， 每个 热水瓶 32 元 ， 这些 热水瓶 可 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "891", "content": "在 一次 跳高 比赛 中 ， 苗苗 跳 过 了 1.2 米 ， 笑笑 比 苗苗 跳 的 高 0.05 米 ， 明明 比 笑笑 跳 的 低 0.15 米 ， 明明 跳 过 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "919", "content": "我国 淡水鱼 大约 有 700 种 ， 比 海洋 鱼类 的 50% 少 300 种 ． 海洋 鱼类 大约 有 多少 种 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9489", "content": "李 军 去 文具店 买 文具 ， 所 带 的 钱 如果 全部 买 笔记本 ， 刚好 可以 买 10 本 ， 如果 全部 买 铅笔 ， 刚好 可以 买 15 枝 ． 现在 他 先买 了 4 本 笔记本 ， 剩下 的 钱 还 能 买 多少 枝 铅笔 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21795", "content": "白兔 和 灰 兔 的 只 数 比 是 5 ： 4 ， 表示 白兔 比 灰 兔 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2238", "content": "一 枝 钢笔 5.5 元 ， 比 一枝 圆珠笔 贵 2.15 元 ， 张老师 买 了 一枝 钢笔 和 一枝 圆珠笔 ， 付给 售货员 20 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7003", "content": "两个 工程队 合 修 一条 隧道 ， 同时 从 两侧 开凿 ， 甲队 每天 修 50 米 ． 乙 队 修 的 比 甲队 的 2 倍 少 10 米 ， 8 天 后 修通 ， 这 条 隧道 有 多长 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "18302", "content": "某班 有 男生 25 人 ， 女生 20 人 ， 女生 比 男生 少 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1277", "content": "刘 叔叔 的 水果 店里 有 苹果 200 千克 ， 比 桃子 少 500 千克 ， 把 桃子 每 5 千克 装 一袋 ， 一共 可以 装 几袋 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18785", "content": "瑞星 2007 版 杀毒软件 打 0.75 销售 后 ， 便宜 了 24 元 ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5905", "content": "13 个 孩子 在 一起 捉迷藏 的 游戏 ， 最后 有 2 个 孩子 躲 得 最巧 ， 没有 捉 到 ， 请问 被 捉 到 的 孩子 有 多少 个 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16665", "content": "一 项 工程 ， 甲 单独 做 5 天 能 完成 这项 工作 的 (5/7) ， 甲 单独 完成 这项 工程 需要 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15186", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 每 小时 行 6 千米 ， 共用 了 4 小时 ， 返回 时 少 用 了 1 小时 ， 这辆 汽车 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2101", "content": "一 本书 有 260 页 ， 小 明 每天 看 12 页 ， 已经 看 了 5 天 ， 剩下 的 想 10 天 看 完 ． 平均 每天 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9396", "content": "某县 今年 稻谷 的 总产量 是 44 万吨 ， 比 去年 增产 (1/10) ． 去年 该县 稻谷 的 总产量 = 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4265", "content": "雨燕 是 长距离 飞行 最快 的 鸟 ． 一只 雨燕 0.5 小时 可 飞行 85 千米 ， 比 一只 信鸽 每 小时 飞行 的 速度 还要 快 10.5 千米 ． 信鸽 每 小时 飞行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15145", "content": "《 百科全书 》 原价 每套 400 元 ， 现 实行 0.75 优惠 后 ： 每套 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22250", "content": "小强 和 小 明 各 有 图书 若干 本 ． 已知 小强 的 图书 占 两 人 图书 总数 的 60% ， 当 小强 借给 小 明 20 本 后 ， 小强 和 小 明 图书 本 数 的 比 是 2 ： 3 ． 两 人 一共 有 图书 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5156", "content": "(5/8) - (1/4) 的 差 除以 (5/16) ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7774", "content": "河东村 有 村民 390 人 ， 比 河西村 少 了 (1/14) ， 河西村 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7886", "content": "2004 年 赵 叔叔 购买 “ 中国邮政 贺卡 有奖 明 雠 片 ” 获得 一等奖 ， 奖金 是 5000 元 ， 根据 税法 规定 他 应 按照 20% 的 税率 缴纳 个人所得税 ． 赵 叔叔 实际 可以 获得 奖金 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2202", "content": "工人 叔叔 修路 ， 第一天 修 了 全长 的 (1/8) ， 第 二 天 修 了 全长 的 (5/8) ， 还 剩 全长 的 几分 之 几 没有 修 完 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14866", "content": "果园 里 有 杏树 65 棵 ， 桃树 的 棵 数 比 杏树 的 4 倍 多 30 棵 ， 果园 里 杏树 和 桃树 共有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10122", "content": "某 钟表 的 分针 表 10 厘米 ， 从 1 时 至 2 时 ， 分针 扫 过 的 面积 = 多少 平方厘米 ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "5956", "content": "第一 车间 原 计划 用 48 小时 生产 2736 个 零件 ， 实际 每 小时 生产 75 个 ， 比 原 计划 每 小时 多 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14925", "content": "一 头 大 猪 重 280 千克 ， 一头 小猪 重 40 千克 ， 这 头 大 猪 的 体重 是 小猪 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10085", "content": "玩具厂 购买 了 一批 布 ， 原来 做 一个 玩具 熊 需要 0.8 米 布 ， 可以 做 720 个 ， 后来 改进 技术 ， 每个 玩具 熊 节约 用布 0.2 米 ， 这 批 布 现在 可以 做 多少 个 玩具 熊 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23002", "content": "利民 商店 一共 花 了 288 元 批发 了 4 箱 梨 ， 每箱 24 ㎏ ， 梨 的 批发价 是 每千克 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4633", "content": "时代 超市 “ 5 一 ” 大 酬宾 ， 全场 家电 按 0.8 销售 ， 原价 150 元 的 电饭锅 ， 现在 售价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6610", "content": "小 兵家 圆桌 的 直径 1.5 米 ， 买 铝合金 条 把 桌边 包 起来 ， 要 买 多少 米 铝合金 条 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7586", "content": "修 一条 公路 ， 第一天 修 了 全长 的 20% ， 第 二 天 修 了 全长 的 35% ， 还 剩 450 米 没有 修 ， 这 条 路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13379", "content": "一 个 乘数 是 7 ， 另 一个 乘数 是 8 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11470", "content": "一 本 故事书 180 页 ， 小 红 已经 看 了 (4/9) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1665", "content": "期末 每班 评 4 名 优秀学生 ， 全校 有 23 个 班 ， 一共 评 多少 名 优秀学生 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17355", "content": "3 台 织布机 (3/2) 小时 织布 72 米 ， 平均 每 台 织布机 每 小时 织布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16984", "content": "我国 税法 规定 ， 月 收入 超过 800 元 的 部分 应 缴纳 个人所得税 ， 超过 部份 在 500 元 至 1500 元 的 要 缴纳 10% 的 个人所得税 ， 小强 的 爸爸 月 收入 2250 元 ， 每月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8668", "content": "一 支 温度计 的 刻度 不 准确 ， 但 相邻 两 格 的 距离 仍然 是 均匀 的 ． 将 这 支 温度计 插入 0 摄氏度 的 冰水 中 ， 温度计 的 示 数 为 8 摄氏度 ； 插入 100 摄氏度 的 沸水 中 ， 温度计 的 示 数 为 96 摄氏度 ． 当 温度计 的 示 数 为 30 摄氏度 时 ， 实际 温度 为 多少 摄氏度 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4762", "content": "张师傅 上 半月 生产 5600 个 零件 ， 比 下半月 少 (1/5) ， 张师傅 这个 月 生产 多少 个 零件 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22703", "content": "一 种 冷藏车 的 车厢 是 长方体 ， 从 里面 量 ， 长 4 米 ， 宽 1.9 米 ， 高 1.8 米 ． 它 的 容积 = 多少 立方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22867", "content": "一 辆 小汽车 4 小时 行 了 260 米 ， 一辆 大客车 每 小时 比 小汽车 少 行 15 千米 ， 一辆 大客车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8715", "content": "一 辆 汽车 以 每 小时 58 千米 的 速度 和 一辆 货车 以 43 千米 / 时 的 速度 同时 从 a 地 开 住 b 地 ， 行驶 11 小时 后 ， 汽车 和 货车 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6425", "content": "第一 果园 里 共有 果树 420 棵 ， 其中 苹果树 占 (3/7) ， 第一 果园 苹果树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1351", "content": "王 刚 参加 数学 竞赛 ， 共 做 了 25 道 题 ， 如果 做 对 一 题 得 4 分 ， 做 错 一 题 倒扣 2 分 ， 王 刚 共 得 了 58 分 ， 问 他 做 错 了 多少 道 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7761", "content": "甲 数 是 48 ， 乙 数 是 32 ， 两 数 和 相当于 丙 数 的 (3/4) ， 丙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21012", "content": "张 教师 把 一根 36.4 米 的 绳子 剪掉 2.8 米 做 了 一根 长 跳绳 ， 他 把 剩下 的 剪成 1.6 米 长 的 短 跳绳 ， 问 一共 可 做成 几根 短 跳绳 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18766", "content": "一 捆 电线 上午 用 去 368 米 ， 下午 用 去 232 米 ， 还 剩 400 米 ． 这 捆 电线 原有 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13298", "content": "3 （ 1 ） 班 有 男生 25 人 ， 女生 23 人 ． 把 全班同学 平均 分成 4 组 ， 每组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10007", "content": "两个 因数 的 积 是 10.8 ， 其中 一个 因数 是 0.9 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8152", "content": "邻居 张 叔叔 很 高兴 ， 原来 他 购买 福利彩票 中 了 奖 ！ 按照 规定 缴纳 20% 的 个人所得税 后 ， 得到 了 一部分 奖金 ， 他 从 这些 奖金 中 抽取 了 12 万元 资助 部分 贫困学生 ， 这时 还 剩下 20 万元 ． 你 猜猜 ： 这次 张 叔叔 究竟 中 了 多少 奖金 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8622", "content": "学校 买来 科技 书 147 本 ， 文艺 书 的 (3/5) 等于 科技 书 的 (4/7) ， 文艺 书 有 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11746", "content": "一 个 三角形 和 与 它 等 底 等 高 的 平行四边形 面积 和 是 120 m ^ 2 ， 三角形 面积 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13262", "content": "张 伯伯 把 20 公顷 土地 的 (2/3) 用来 种 玫瑰 ， 其中 红玫瑰 占 玫瑰 种植 面积 的 (3/5) ． 张 伯伯 中 了 多少 公顷 红玫瑰 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11439", "content": "一 个 农场 用 拖拉机 耕地 ， 3 台 3.5 小时 共 耕地 2.52 公顷 ． 平均 每 台 拖拉机 每 小时 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7043", "content": "小 杨 上午 做 了 48 个 玩具 ， 下午 做 了 54 个 玩具 ， 每 6 个 玩具 装 一箱 ． 这天 小 杨 做 的 玩具 一共 可以 装 几箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21633", "content": "每个 乐 羊 羊 挂件 4.5 元 ， 冬冬 买 了 3 个 ， 他 付给 售货员 20 元 钱 ， 应该 找回 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18932", "content": "学校 图书馆 买来 3 种 图书 共计 1800 余册 ． 其中 科技 书 250 册 ， 故事书 比 科技 书 多 320 册 ， 其余 的 教学 参考书 ． 买 教学 参考书 多少 册 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "955", "content": "小 明 寒假 看 一本 126 页 的 科普 书 ， 第一天 看 了 24 页 ， 第 二 天 看 的 与 第一天 同样 多 ， 还有 多少 页 没有 看 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9765", "content": "某 小学 学生 乘坐 相同 的 船 到 岛屿 学校 上课 ， 如果 每 条 船 坐 15 人 ， 则 有 3 人 没 位置 坐 ， 如果 每 条 船 多 坐 2 人 ， 则 有 5 个 空 坐位 没 人 坐 ， 问 一共 有 多少 条 船 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5548", "content": "公路 旁 每 两根 电线杆 之间 的 距离 是 15 米 ， 小 明 从 第一根 电线杆 跑 到 第 10 根 电线杆 ， 共 跑 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14810", "content": "“ 6 • 一 ” 儿童节 期间 ， 某 书店 的 儿童读物 一律 打 0.6 出售 ． 打折 期间 一本 儿童读物 的 售价 是 5.4 元 ， 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19079", "content": "某校 有 学生 800 人 ， 其中 男生 480 人 ， 男生 比 女生 多 几 人 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10356", "content": "小 月 爸爸 将 48000 元 钱 存入 银行 ， 整存整取 2 年 ， 年利率 是 2.79% ． 到期 时 ， 小 月 爸爸 应 缴纳 多少 元 利息税 ？ （ 利息 税率 为 5% ）", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "7244", "content": "一 个 剧场 能 坐 870 人 ． 这 剧场 的 票 8 元 一张 ， 票 都 买 完 ． 这场 的 票房 收入 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11159", "content": "一 桶 油 剩下 的 是 28 千克 ， 用 去 的 是 剩下 的 25% ， 用 去 的 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4806", "content": "一 种 商品 的 原价 是 120 元 ， 现 打 0.8 销售 ， 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18162", "content": "小 明 计划 20 天 走 400 米 ， 实际 每天 多 走 100 米 ， 她 提前 几天 走 完 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10920", "content": "买 一台 电脑 需要 7200 元 ， 比 买 一台 空调 的 2 倍 少 80 元 ， 买 一台 空调 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9047", "content": "把 一根 绳子 平均 截 成 8 段 ， 每 段 绳 长 是 这根 绳 长 的 多少 （ 填 分数 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15697", "content": "小强 计划 用 12 天 看 一本 180 页 的 小说 ， 实际 每天 比 计划 多 看 5 页 ， 照 这样 计算 ， 看 完 这 本书 比 计划 少 用 了 多少 天 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9215", "content": "小 芳 家 土 个 月 买 了 一台 电脑 用 去 了 4660 元 ， 又 花 了 1840 元 配置 了 一套 软件 ． 这两项 开支 共用 去 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9005", "content": "张师傅 4 小时 生产 28 个 零件 ， 照 这样 计算 要 生产 84 个 零件 需要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5343", "content": "6 （ 1 ） 班 有 45 人 ， 女生 比 全班 人数 的 (1/3) 多 2 人 ， 这个 班 有 男生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20483", "content": "甲乙 两辆 货车 同时 从 相距 954 千米 的 两地 相向 而 行 ， 经过 18 小时 两车 相遇 ， 甲 车 的 速度 是 每 小时 25 千米 ， 乙 车 的 速度 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14747", "content": "从 420 里 连续 减去 6 ， 最 多 可以 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6255", "content": "图书馆 新 买 了 一张 桌子 用 了 65 元 ， 买 了 一把 椅子 用 了 25 元 ， 照 这样 计算 ， 买 12 套 这样 的 桌椅 ， 要 用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1327", "content": "学校 图书室 买来 200 本书 ， 放在 2 个 书架上 ， 每个 书架 有 4 层 ． 你 能 算 出 平均 每层 放 了 多少 本书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19453", "content": "小 立 买 了 一个 随身听 ， 原价 240 元 ， 商场 按 0.75 销售 ， 小 立 少 花 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5261", "content": "客车 从 甲地 ， 货车 从 乙地 同时 相对 开出 ， 6 小时 后 客车 距 乙地 还有 全程 的 (1/8) ， 货车 距 甲地 还有 138 千米 ， 已知 客车 比 货车 每 小时 多行 15 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22119", "content": "水果店 有 一批 西瓜 ， 上午 卖掉 2 吨 ， 卖掉 的 正好 是 这 批 西瓜 的 (4/7) ． 下午 卖掉 这 批 西瓜 的 40% ， 下午 卖掉 了 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9212", "content": "学校 买 彩色 粉笔 45 盒 ， 买 的 白粉笔 比 彩色 粉笔 多 15 盒 ． 一共 买 多少 盒 粉笔 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12905", "content": "向阳 小学 有 文艺 书 1500 本 ， 科技 书 的 本 数 比 文艺 书 的 2 倍 少 260 本 ， 文艺 书 和 科技 书 一共 有 多少 本 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "981", "content": "一 个数 的 7.2 倍 是 133.2 ， 它 的 4.8 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21772", "content": "从 54 里面 减 9 ， 连续 减 多少 次 后 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17182", "content": "小 红 家 买来 一袋 大米 ， 吃 了 (5/8) ， 还 剩 5 千克 ， 小 红 家 买来 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1833", "content": "养鸡场 将 一批 鸡蛋 装箱 ， 若 用 a型 箱 ， 正好 要 装 800 箱 ， 但 a型 箱 数量 不足 ， 全部 改用 b型 箱 装 ． 已知 每个 b型 箱 的 容量 是 a型 箱 的 (4/5) ， 需要 b型 箱 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6105", "content": "6 （ 4 ） 男生 人数 是 女生 人数 的 3 / 5 ， 女生 人数 占 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21433", "content": "绿化 小分队 原 计划 8 天 植树 768 棵 ， 实际 每天 比 原 计划 多 植树 32 棵 ． 实际 多少 天 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8189", "content": "果园 里 桃树 棵 数 是 苹果树 的 (2/5) ， 苹果树 棵 数 是 梨树 的 (2/3) ， 桃树 棵 数 是 梨树 的 多少 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22430", "content": "一 个数 的 60% 是 19.2 ， 它 的 90% = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14255", "content": "光明 小学 一年级 有 学生 248 人 ， 是 二年级 人数 的 2 倍 ， 而 三年级 学生 的 人数 是 二年级 的 3 倍 ． 光明 小学 三年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4174", "content": "一 捆 电线 有 30 圈 ， 每圈 的 直径 是 0.6 米 ， 求 电线 的 总长 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20351", "content": "飞行员 们 要 每天 训练 3 小时 飞行 ， 训练 飞机 飞行 的 速度 大约 是 760 千米 / 时 ， 飞行员 们 每天 飞行 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7078", "content": "学校 美术 兴趣小组 有 18 人 参加 ， 参加 音乐 兴趣 组 的 人数 是 美术组 的 12 倍 ， 参加 音乐 兴趣 组 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "301", "content": "什么 数 减去 3.5 后 乘 8 ， 结果 是 56 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20130", "content": "商店 运 来 120 辆 自行车 ． 第一天 卖出 总数 的 (1/3) ， 第 二 天 卖出 的 辆数 相当于 第一天 的 (7/8) ． 还 剩 多少 辆 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "20134", "content": "小胖 今年 10 岁 ， 爷爷 的 年龄 是 小胖 的 7 倍 少 3 岁 ， 爷爷 今年 几岁 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7405", "content": "王老师 从 家 步行 去 学校 ， 平均 每步 的 长度 是 0.55 米 ． 他 已经 走 了 312 步 ， 这时 离 学校 还有 455 米 ． 王老师 家 距离 学校 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6790", "content": "学校 用 5000 元 购买 电脑桌 ． 一张 电脑桌 是 290 元 ， 一共 买 了 12 张 ， 还 剩 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1290", "content": "小 明 读 一本 180 页 的 书 ， 已 读 了 全书 的 (2/3) ， 还 剩下 多少 页 没 读 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8394", "content": "小 明 看 一本 课外读物 ， 每天 看 6 页 ， 8 天 看 完 这个 本书 的 一半 ． 以后 他 每天 多 看 2 页 ， 那么 他 要 看 完 这 本书 ， 一共 需要 多少 天 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14669", "content": "哥哥 身高 105 厘米 ， 比 弟弟 高 20 厘米 ， 爸爸 的 身高 正好 是 弟弟 的 2 倍 ． 爸爸 的 身高 = 多少 厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22334", "content": "城市 花园 共 占地 24000 平方米 ， 绿化率 占 到 35% ． 绿化 面积 有 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4682", "content": "比 36 千克 少 20% = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9118", "content": "一 个数 的 1.9 倍 是 114 ， 求 这个 数 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21854", "content": "水利 工地 挖 一条 长 (3/4) 千米 的 水渠 ， 第一周 挖 了 (1/3) ， 第一周 挖 了 多少 千米 ？ 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11988", "content": "某 乡 要 修 一条 长 6 千米 的 环山 渠 ， 第一期 修 了 全长 的 (1/2) ， 第 二 期 又 修 了 全长 的 30% ， 还 剩 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13054", "content": "同学 们 参加 大扫除 ． 男同学 有 30 人 ， 比 女同学 多 6 人 ． 女同学 有 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14413", "content": "学校 买来 12 个 书架 ， 每个 书架 有 4 层 ， 每层 可以 放 45 本 ， 这些 书架 一共 可以 放 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14472", "content": "已知 汽车 在 公路 上 的 速度 是 80 千米 / 时 ， 在 草原 上 的 速度 是 50 千米 / 时 ， 一辆 汽车 出发 在 行驶 过程 中 ， 走 了 3 小时 公路 ， 又 在 草原 上 走 了 2 小时 ． 终于 到达 目的地 ， 目的地 距离 起点 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11814", "content": "卡车 从 南京 开往 上海 ， 行 了 2 小时 走 完 了 180 千米 ， 照 这样 的 速度 计算 ， 行 完全 程 540 千米 ， 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10236", "content": "把 一个 长 2 ， 宽 1.5 米 ， 高 0.8 米 的 箱子 放在 仓库 里 ， 这个 箱子 的 占地面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20088", "content": "0.25 * 43 + 0.75 * 19 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10534", "content": "一 台 点读机 打 0.8 后 的 价钱 是 320 元 ， 这 台 点读机 的 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23154", "content": "江 老师 买 一张 光碟 用 去 26 元 ， 买 5 张 软盘 用 去 75 元 ， 一张 软盘 比 一张 光盘 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11582", "content": "在 为 印度洋 地震 海啸 灾区 捐款 活动 中 ， 五年级 同学 共 捐款 480 元 ， 比 六年级 少 捐 20% ． 六年级 同学 捐款 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8577", "content": "从 72 里 连续 减去 多少 个 9 ， 正好 减 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2627", "content": "一 批 水果 卖掉 (1/5) 后 ， 又 卖出 6 千克 ， 这时 卖出 的 与 剩下 的 水果 的 比 是 1 ： 2 ． 这 批 水果 原来 有 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11725", "content": "一 堆 沙子 ， 用 去 一部分 后 还 剩 (1/4) 吨 ， 正好 是 用 去 的 (1/5) ． 这 堆 沙子 共 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2703", "content": "某 公司 接到 一批 电脑 显示器 的 定单 ， 原 计划 每天 生产 50 台 ， 12 天 完成 任务 ． 实际 每天 比 计划 每天 多 生产 20% ． 实际 多少 天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22019", "content": "某 河坝 横截面 式 43.2 平方米 的 梯形 ， 体积 共 8640 平方米 ， 那么 河坝 长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1643", "content": "学校 五年级 6 个 班 参加 乒乓球 比赛 ， 每班 选 3 个 男同学 和 2 个 女同学 ． 参加 比赛 的 一共 有 多少 个 同学 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19957", "content": "同学 们 拾 废品 ， 第一 小组 拾 了 5.4 千克 ， 第 二 小组 比 第一组 多 拾 了 0.5 千克 ． 两个 小组 共 拾 了 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8229", "content": "一 件 商品 降价 20% 后 是 320 元 ， 商品 的 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5158", "content": "新华书店 新 运进 故事书 3800 本 ， 文艺 书 比 故事书 少 运进 800 本 ． 两种 书 一共 运进 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1492", "content": "3.7 与 3 的 积 ， 减去 36.8 / 4 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10579", "content": "1 千克 大米 5.66 元 ， 买 3.5 千克 大米 应付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18804", "content": "某 大型超市 每天 的 营业额 约 8800 元 ， 而 一 小型 超市 每天 的 营业额 只有 大型超市 的 (1/4) ， 小型 超市 每天 的 营业额 比 大型超市 少 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8805", "content": "减数 是 4.67 ， 差 是 2.45 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "15030", "content": "1.25 与 16 的 积 减去 4 / 1.6 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21061", "content": "仓库 有 一批 货物 ， 运走 的 货物 与 剩下 的 货物 的 质量 比 为 7 ： 2 ， 如果 又 运走 64 吨 ， 那么 剩下 的 货物 只有 仓库 原有 货物 的 (1/5) ， 仓库 原有 货物 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2537", "content": "建筑工地 运 来 水泥 30 吨 ， 第一天 用 去 了 全部 的 (1/5) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19989", "content": "一 批 煤 共有 500 吨 ， 第一个 月 用 去 了 总量 的 (1/5) ， 还 剩下 多少 吨 煤 没用 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4375", "content": "水果店 运 来 苹果 12 箱 ， 香蕉 18 箱 ． 两种 水果 每箱 都 重 15 千克 ． 运 来 的 苹果 和 香蕉 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23032", "content": "一 根 绳子 长 (8/9) 米 ， 截下 (1/4) 米 ， 还 剩 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10570", "content": "耀华 学校 举办 圣诞 晚会 ， 准备 做 15 套 演出服 ， 平均 每套 衣服 用布 1.6 米 ， 每 米 布 的 价格 是 45.5 元 ． 算 一 算 ， 购买 布料 一共 要 花 去 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17862", "content": "王小兰 和 李 小 鹏 两个 爱 集邮 ， 王小兰 集邮票 86 张 ， 李 小 鹏 集邮票 张 数 比 王小兰 集邮票 张 数 的 3 倍 少 34 张 ， 两 人 一共 集邮 多少 张 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20649", "content": "5 （ 3 ） 班 买 了 4 把 椅子 和 2 张 桌子 共 花 了 198 元 ， 每 把 椅子 的 价钱 是 22 元 ， 你 能 算 出 每张 桌子 的 价钱 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1435", "content": "一 个数 除以 6 ， 商 是 104 ， 余数 是 5 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14876", "content": "张 阿姨 上午 做 了 36 个 福娃 ， 下午 做 了 48 个 福娃 ． 把 这些 福娃 每 6 个 装 一盒 ， 可以 装 多少 盒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19143", "content": "小 明 读 一本 科技 书 ， 已经 读 了 86 页 ， 还有 74 页 没有 读 ， 这本 科技 书 有 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12530", "content": "一 支 钢笔 现价 24 元 ， 比 原价 降低 了 (1/7) ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17080", "content": "一 个数 的 4 倍 是 32 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20562", "content": "两个 数 的 差 是 15.4 ， 如果 被减数 减少 2 ， 减数 不变 ， 那么 差 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9442", "content": "一 个数 的 (4/9) 是 15 个 (1/10) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6046", "content": "王 生 储蓄 的 钱 数 比 张 华 多 20% ， 王 生 储蓄 的 钱 数 是 张 华 的 百分之几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19533", "content": "将 一个 边长 为 5 分 米 的 正方形 纸片 卷 成 圆柱 筒 ， 这个 圆柱 的 侧 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2969", "content": "已知 甲 校 学生 数 是 乙 校 学生 数 的 (2/5) ， 甲 校 的 女生 数 是 甲 校 学生 数 的 (3/10) ， 乙 校 的 男生 数 是 乙 校 学生 的 (21/50) ， 那么 两 校 女生 总数 占 两 校 学生 总数 的 几分 之 几 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9011", "content": "王 蒙 买 了 一个 步步高 点读机 ， 原价 840 元 ， 现在 打 0.8 出售 ， 王 蒙 实际 花 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1091", "content": "一 辆 自行车 轮胎 的 直径 是 0.6 米 ， 如果 每分钟 转 200 圈 ， 那么 通过 一座 长 1507.2 米 的 大桥 ， 需要 多长时间 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21666", "content": "某 小学 “ 地球村 ” 的 同学 们 回收 废品 活动 的 成绩显著 ， 去年 共 回收 旧 报纸 720 千克 ， 废塑料 600 千克 ． 回收 的 旧 报纸 比 废塑料 重 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20147", "content": "从 18.3 里 减去 4.5 的 4 倍 ， 所得 的 差 被 3 除 ， 结果 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20263", "content": "客车 货车 同时 从 a 地 、 b 地 相对 开出 ， 已知 客车 每 小时 行 60 千米 ， 货车 每 小时 行 全程 的 (1/10) ， 当 货车 行 到 全程 的 (2/5) 时 ， 客车 恰好 行 了 全程 的 (5/8) ． ab 两地 间 的 路程 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9265", "content": "一 堆 水泥 24 吨 ， 已 用 去 (3/4) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2052", "content": "一 桶 水 的 (1/4) 正好 是 15 千克 ， 这 桶 水 = 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14797", "content": "比 200 少 15% 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1762", "content": "一 辆 客车 从 甲地 开往 乙地 ， 行 了 全程 的 (5/8) ， 距离 终点 84 千米 ， 两地 间 的 公路 长 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22064", "content": "光明 小学 共 27 个 班 ， 每班 各 买 一个 脸盆 和 一条 毛巾 一共 要 用 去 189 元 ， 每 条 毛巾 3 元 ， 每个 脸盆 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2081", "content": "洋洋 买 一种 “ 龙骑士 ” 战斗 陀螺 ， 经过 还价 后 ， 付款 6 元 钱 ， 比 原价 便宜 了 4 元 钱 ． 小龙 买 战斗 陀螺 实际 价钱 比 原价 便宜 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20429", "content": "为民 食堂 上 月 实际 用 煤 3.4 吨 ， 比 计划 节约 20% ， 节约 了 多少 吨 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10822", "content": "长沙 到 广州 的 铁路 长 699 千米 ， 一列 货车 从 长沙 开往 广州 ， 每 小时 行 69 千米 ， 这 列 货车 开出 1 小时 后 ， 一列 客车 从 广州 出发 开往 长沙 ， 每 小时 行 71 千米 ， 再 过 几小时 后 两车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5379", "content": "一 辆 汽车 去 省城 ， 前 3 小时 的 速度 是 60 千米 / 小时 ， 后 2 小时 的 速度 是 50 千米 / 小时 ， 这辆 汽车 一共 行驶 了 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22868", "content": "被除数 是 18 ， 除数 是 3 ， 商 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20125", "content": "王老师 把 20000 元 存入 银行 ， 存期 一年 ， 到期 后 的 税前 利息 和 本金 共 20700 元 ． 年利率 = ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10757", "content": "科技 小组 女生 人数 占 总 人数 的 (2/5) 少 3 人 ， 男生 有 24 人 ， 科技 小组 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4354", "content": "同学 们 为 班级 图书 角 捐书 ， 故事书 有 120 本 ， 文艺 书 是 故事书 的 (11/12) ， 科技 书 是 文艺 书 的 (9/11) ， 捐 的 科技 书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3887", "content": "筑路 队 修 一条 公路 ． 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 (3/4) 千米 ， 还 剩 3 千米 ． 这 条 路 全长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13844", "content": "东村 今年 植树 24 公顷 ， 去年 植树 的 面积 是 今年 的 (7/8) ． 去年 植树 多少 公顷 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1908", "content": "24 辆 卡车 一次 能 运货 192 吨 ， 现在 同样 的 卡车 增加 到 32 辆 ， 一次 能 运货 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15870", "content": "王老师 往 图书室 里 搬 书 ， 每次 搬 15 本 ， 12 次 刚好 搬 了 一半 ． 剩下 的 每次 搬 18 本 ， 再 要 几次 才能 搬 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19706", "content": "甲乙 两队 合 修 一条 路 ， 甲队 修 了 320 米 ， 占 这 条 路 的 (4/9) ． 乙 队 修 了 这 条 路 的 (3/8) ， 乙 队 修 了 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20993", "content": "买 3 箱 同样 的 苹果 共 付 180 元 ， 照 这样 计算 ， 再 买 5 箱 这样 的 苹果 ， 一共 需 付 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14485", "content": "某 饲养场 养 了 2400 只 鹅 ， 鹅 的 只 数 是 鸭 的 (3/4) ， 鸭 的 只 数 是 鸡 的 (4/5) ， 饲养场 养 了 多少 只 鸡 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8125", "content": "某 安居 小区 今年 植树 45 棵 ， 已知 去年 植树 的 棵 数 相当于 今年 的 (4/5) ， 今年 比 去年 多 植树 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21907", "content": "34.16 + 47.82 + 53.84 + 64.18 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16714", "content": "35 吨 增加 它 的 (1/7) 后 = 多少 吨 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8874", "content": "粮店 运 来 一批 面粉 ， 每 袋 25 千克 ， 卖 了 35 袋 后 还 剩 50 千克 ， 粮店 运 来 多少 千克 面粉 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8927", "content": "一 个 正方形 的 周长 是 4 分 米 ， 它 的 面积 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19440", "content": "啄木鸟 每天 吃 害虫 632 只 ， 青蛙 每天 吃 害虫 78 只 ， 那么 啄木鸟 每天 吃 害虫 比 青蛙 多 多少 只 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "3509", "content": "美术 、 科技 两个 组 比赛 ， 美术组 48 人 参赛 ， 科技 组 比 美术组 的 2 倍 还 多 10 人 ， 两个 组 共有 多少 人 参赛 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11710", "content": "芜湖 钢铁厂 要 生产 一批 钢材 ， 计划 每天 生产 600 吨 ， 20 天 完成 ． 实际 每天 生产 800 吨 ， 实际 比 计划 少 用 多少 天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13197", "content": "2222 + 3333 + 4444 + 5555 + 6666 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "5815", "content": "学校 举行 运动会 ， 同学 们 分成 了 6 个 大队 ， 每个 大队 包括 8 个 小队 ， 每 小队 35 人 ， 一共 有 多少 人 参加 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14956", "content": "水 结成 冰 后 体积 增加 (1/10) ， 现在 有 一块 冰 ， 体积 是 (22/5) 立方米 ， 融化 成 水 后 的 体积 = 多少 立方米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22144", "content": "电视机厂 今年 计划 比 去年 增产 (2/5) ． 去年 生产 电视机 (1/5) 万台 ， 今年 计划 增产 多少 万台 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3313", "content": "327 * 2.8 + 17.3 * 28 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11671", "content": "工厂 生产 啤酒 680 瓶 ， 装 成 56 箱 后 ， 还 余下 8 瓶 ， 平均 每箱 装 多少 瓶 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14898", "content": "一 辆 旅游车 0.6 小时 行驶 30.6 千米 ， 用 同样 的 速度 由 甲 站 开往 乙 站 需 行驶 3.85 小时 ． 甲 、 乙 两站 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21858", "content": "减数 是 180 ， 差 是 120 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19984", "content": "小 明 3 天 内 看 完 一本 小说 ． 第一天 看 的 比 总 页数 的 (1/3) 多 5 页 ， 第 二 天 看 的 比 总 页数 的 50% 少 10 页 ， 已知 前两天 看 的 页数 相等 ． 这 本书 有 几页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1845", "content": "第一 养鸡场 养鸡 2670 只 ， 第 二 养鸡场 比 第一 养鸡场 少 养 980 只 ， 两个 养鸡场 一共 养鸡 多少 只 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6758", "content": "果园 里 有 苹果树 180 棵 ， 桃树 78 棵 ， 杏树 49 棵 ， 苹果树 比 桃树 和 杏树 的 总数 还 多 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18093", "content": "5 （ 1 ） 班 有 48 本 童话 书 ， 是 科技 书 的 3 倍 ． 科技 书 有 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10719", "content": "一 堆 煤 ， 计划 每天 烧 45 千克 ， 可以 烧 32 天 ， 由于 节省 用 煤 ， 实际 烧 了 36 天 ， 实际 每天 烧煤 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4884", "content": "甲 数 比 乙 数 少 (1/4) ， 乙 数 比 甲 数多 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12343", "content": "在 200 克 盐水 中 ， 食盐 10 克 ， 则 盐 占 水 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18940", "content": "6 一 国际 儿童节 表演 节目 要 购买 男女生 的 服装 各 16 套 ， 男装 每套 36 元 ， 女装 每套 42 元 ． 买 这些 服装 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16684", "content": "某 工厂 计划 生产 一批 零件 ， 第一次 完成 计划 的 (1/2) ， 第 二 次 完成 计划 的 (3/7) ， 第 3 次 完成 450 个 ， 结果 超过 计划 的 (1/4) ， 计划 生产 零件 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17672", "content": "小林 和 爸爸 花 了 70 元 钱 买 了 2 张 足球 票 看 足球 ， 因为 人 太 多 ． 他们 只能 坐在 最后 的 第 55 排 的 149 号 和 150 号 ． 这场 足球赛 卖票 收入 最 多 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9225", "content": "存车 棚里 有 自行车 60 辆 ， 比 摩托车 多 25% ， 摩托车 有 多少 辆 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3540", "content": "一 个 底 面积 是 24 平方米 的 长方体 蓄水池 ， 最 多 能 蓄水 60 立方米 ， 这个 蓄水池 深 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13655", "content": "某 服装厂 出厂 960 件 衬衫 ， 一共 装 了 12 箱 ， 每箱 装 8 包 ， 每包 多少 件 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19790", "content": "小 伟 一个 星期 看 一本 故事书 ， 前 3 天 共 看 46 页 ， 后 4 天 每天 看 20 页 ． 他 平均 每天 看书 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18992", "content": "李 叔叔 上山 时 每分钟 走 65 米 ， 40 分钟 到达 山顶 ； 下山 时 按 原 路 返回 ， 只用 了 26 分钟 ． 李 叔叔 下山 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2241", "content": "第一 小学 去年 植树 2000 棵 ， 成活率 是 98% ， 植 的 树 活 了 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7570", "content": "书店 以 每 本 10.08 元 的 价格 购进 某种 图书 ， 每 本 售价 16.8 元 ， 卖 到 还 剩 10 本 时 ， 除了 收回 全部 成本 外 ， 还 获利 504 元 ． 这个 书店 购进 该种 图书 多少 本 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2115", "content": "列式 ． 不 计算 ： 一袋 米 ， 用 去 20% ， 还 剩 50 公斤 ， 这 袋 米 原有 多少 公斤 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9615", "content": "王 兵 读 一本 课外书 ， 已经 读 了 22 页 ， 己 读 页数 和 未 读 页数 的 比 是 2 ： 5 ． 这本 课外书 一共 有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21454", "content": "玲玲 买 了 一个 随身听 ， 原价 160 元 ， 现在 离 店 打 0.9 出售 ， 现价 比 原价 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9025", "content": "列式 计算 ： 8 的 2.5 倍 比 一个 数 的 40% 少 7.2 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18752", "content": "20 位 小朋友 站 成 一排 做操 ， 每 相邻 的 两个 小朋友 相隔 2 米 ， 做操 的 队伍 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13695", "content": "一 共 要 种 680 棵 树苗 ， 园林 叔叔 平均 每天 种 90 棵 ， 种 了 5 天 ， 还 剩 多少 棵 没 种 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15810", "content": "把 一个 长 1.2 米 ， 宽 0.6 米 ， 高 4 分 米 的 长方体 鱼缸 放在 厅堂 里 ， 这个 鱼缸 的 占地面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16303", "content": "甲乙 两车 同时 从 相距 90 千米 的 两地 相对 开出 ， (2/3) 小时 后 两车 在 途中 相遇 ． 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9280", "content": "某 电脑厂 冢 原来 每天 生产 电脑 300 台 ， 现在 每天 的 产量比 原来 增加 (2/25) ， 现在 每天 生产 的 电脑 比 原来 多 多少 台 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20555", "content": "一 个数 的 (1/3) 等于 (2/3) 与 (2/5) 的 和 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16261", "content": "一 件 工作 ， 由 甲 单独 做 10 天 能 完成 ， 乙 单独 做 12 天 才能 完成 ， 丙 独 做 15 天 才能 完成 ． 如果 3 人 合 做 ， 多少 天 可 完成 ？", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1172", "content": "幼儿园 买 了 56 箱 矿泉水 ， 每箱 24 瓶 ， 每瓶 2 元 ， 一共 要 花 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "140", "content": "一 批 货物 ， 上午 运走 12 吨 ， 下午 运 的 吨数 是 上午 的 (3/4) ， 这天 一共 运走 货物 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2106", "content": "某 乡 去年 的 工业 总产值 8500 万元 ， 比 前年 多 20% ， 前年 的 工业 总产值 = 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17250", "content": "甲 、 乙 两个 车队 同时 从 相隔 330 千米 的 两地 相向 而 行 ， 甲队 每 小时 行 60 千米 ， 乙 队 每 小时 行 50 千米 ． 一个 人 骑 摩托车 以 每 小时 行 80 千米 的 速度 在 两 车队 中间 往返 联络 ， 问 两 车队 相遇 时 ， 摩托车 行驶 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4502", "content": "布袋中 装有 红 、 黄 、 蓝 、 绿 4 种颜色 的 小球 各 4 个 ， 为 保证 一次 能 取出 两个 颜色 相同 的 小球 ， 一次 至少 要 摸 出 多少 个 小球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8339", "content": "果园 里 有 300 棵 桃树 ， 苹果树 的 棵 树 是 桃树 的 80% ， 又 是 梨树 的 (4/7) ， 桃树 比 梨树 少 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1893", "content": "王 芳 把 节约 的 48 元 钱 存入 红领巾 银行 ， 王 芳 存 的 钱 相当于 刘 燕 存款 的 (3/4) ， 而 张 红 的 存款 是 刘 燕 的 (5/8) ， 张 红 的 存款 有 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5966", "content": "把 3 米 长 的 钢管 平均 分成 4 段 ， 每 段长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18563", "content": "大客车 到 站 后 下车 15 人 ， 上车 3 人 ， 这时 车上 有 30 人 ， 原来 大客车 上 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "612", "content": "买 3 本 笔记本 ， 付出 20 元 ， 找回 8 元 ， 每 本 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14520", "content": "实验 小学 开展 “ 环保 周 种 盆花 ” 活动 ， 前 3 天 平均 每天 种 114 盆 ， 后 4 天 共 种 750 盆 ， “ 环保 周 ” 内 平均 每天 栽种 盆花 多少 盆 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1768", "content": "徐 露 家 安装 数字电视 后 共 可 收 83 个 台 ， 比 原来 的 2 倍 还 多 11 个 台 ， 原来 有 多少 个 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13304", "content": "25 + [ (2/5) * 0.75 + （ (1/2) + □ ） * 3 ] / 0.3 = 111 ， □ 应 填 多少 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2585", "content": "红日 小学 二年级 有 学生 156 人 ， 比 三年级 多 39 人 ， 四年级 比 三年级 多 78 人 ， 四年级 有 学生 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9967", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 25% ， 第 二 小时 行 了 全程 的 35% ， 两 小时 行 了 114 千米 ． 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11580", "content": "50 的 (3/5) 相当于 80 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22126", "content": "一 件 西服 原价 180 元 ， 现在 的 价格比 原来 降低 了 (1/5) ， 现在 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14447", "content": "5 （ 一 ） 班 有 男生 23 人 ， 女生 27 人 ， 男生 占 全班 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13109", "content": "陈 华 画画 用 了 (3/4) 小时 ， 比 写毛笔字 多用 (1/6) 小时 ， 写毛笔字 用 了 多少 小时 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21808", "content": "某 数 的 4 倍 + 0.9 ， 和 是 6.7 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22978", "content": "练一练 ： 甲 、 乙 两地 相距 480 千米 ， 客车 和 货车 同时 从 两地 相向 而 行 ， 经过 5 小时 相遇 ， 客车 的 速度 是 每 小时 50 千米 ， 求 货车 的 速度 是 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23133", "content": "小 芳 家 距 她 的 姑姑家 有 195 千米 ， 她 坐 的 汽车 平均 每 小时 行驶 65 千米 ， 她 到 姑姑家 要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13253", "content": "一 个 因数 是 180 ， 另 一个 因数 是 9 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3945", "content": "甲 数 27 ， 比 乙 数 的 40% 多 5 ， 乙 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17026", "content": "19 / 209 的 商 加上 47 ， 和 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5781", "content": "王家 有 耕地 8 公顷 ， 其中 3 公顷 是 旱地 ． 旱地 的 面积 是 耕地 总面积 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15710", "content": "一 辆 汽车 前 2 小时 每 小时 行 60 千米 ， 后 3 小时 每 小时 行 70 千米 ， 这辆 汽车 的 平均速度 = 多少 千米 / 小时 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4971", "content": "某 粮店 运 来 140 袋 大米 ， 每 袋 重 25 千克 ， 卖出 一些 大米 后 ， 还 剩 48 袋 ， 问 这个 粮店 卖出 了 多少 千克 大米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18084", "content": "大西洋 平均 深度 为 3.627 千米 ， 印度洋 平均 深度 比 它 深 0.27 千米 ， 太平洋 平均 深度 比 印度洋 深 0.131 千米 ， 太平洋 平均 深度 = 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19719", "content": "某班 有 学生 48 人 ， 其中 女生 有 18 人 ， 后来 又 转 来 多少 名 女生 ， 这时 女生 是 全班 人数 的 40% ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8985", "content": "在 一条 长 24 千米 的 公路 的 一边 ， 一共 栽 了 4300 棵 杨树 ， 3020 棵 柳树 ． 平均 每 千米 栽 了 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20888", "content": "用 0.32 千克 的 鸡蛋 能 做出 1.6 千克 的 蛋糕 ， 现在 要 做 14 千克 的 蛋糕 ， 需要 鸡蛋 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8028", "content": "小麦 的 出粉率 是 65% ， 要 出 粉 195 千克 需要 小麦 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11133", "content": "从小 华 家 到校 有 3 条 路 ， 从 学校 到 公园 4 条 路 走 ． 从小 华 家 经过 学校 到 公园 ， 有 几种 不同 的 走法 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5667", "content": "1.25 * 17.6 + 36 / 0.8 + 2.64 * 12.5 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10017", "content": "4.5 的 4 倍 比 一个 数 的 1.2 倍 多 1.8 ， 求 这个 数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8771", "content": "甲乙 两地 相距 500 千米 ， 两车 同时 从 两地 相对 出 ， 开出 5 小时 后 两车 相遇 ． 客车 平均 每 小时 行 60 千米 ， 货车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4466", "content": "白兔 有 60 只 ， 白兔 与 黑 兔 的 比 是 3 ： 5 ， 一共 有 多少 只 兔 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7325", "content": "4 台 收割机 2 小时 可以 收割 288 公亩 小麦 ． 照 这样 计算 ， 用 8 台 同样 的 收割机 收割 1800 公亩 小麦 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13005", "content": "一 辆 汽车 从 甲地 往 乙地 送货 ， 去 时 每 小时 行驶 44 km ， 用 了 6 小时 ， 回来 时 用 5.5 h ， 这辆 汽车 回来 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18836", "content": "一 项 工程 ， 甲 单独 做 6 天 完成 ， 那么 甲 每天 完成 工作量 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20367", "content": "修路 队 要 修 一条 4.8 千米 的 公路 ， 计划 要 用 15 天 修 完 ． 实际 每天 比 计划 多 修 0.08 千米 ， 实际 多少 天 就 完成 了 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8905", "content": "a ， b 两地 相距 320 千米 ， 甲 、 乙 两车 分别 从 a ， b 两地 同时 相向 而 行 ， 2 小时 后 相遇 ． 已知 甲 车 的 速度 是 乙 车 的 (7/9) ， 甲 车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17335", "content": "一 根 电线杆 埋 在 地下 的 部分 长 2 米 ， 占 全长 的 (2/13) ， 这根 电杆 有 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13512", "content": "平 东乡 修 一条 2.04 千米 的 护城河 河堤 ， 前 15 天 平均 每天 修 0.085 千米 ， 余下 的 要 用 5 天 完成 ， 平均 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15519", "content": "公园 里 有 月季 375 棵 ， 兰花 有 75 棵 ， 菊花 的 棵 数 是 月季 的 6 倍 多 45 棵 ， 有 菊花 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13103", "content": "汽车 3 小时 行驶 165 千米 ， 摩托车 每 小时 比 汽车 快 12 千米 ． 摩托车 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4408", "content": "一 个 服装厂 原来 做一套 制服 用 3.8 米 布 ， 改变 裁剪 方法 后 ， 每套 节省 布 0.2 米 ， 原来 做 1800 套 制服 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1015", "content": "果园 里 有 35 行 桃树 ， 每行 24 棵 ， 平均 每棵 收 48 kg 桃子 ， 这个 果园 一共 可以 收 桃 多少 kg ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9878", "content": "一 支 钢笔 18 元 ， 一本 儿童读物 4 元 ． 小 红 用 50 元 钱 买 了 一支 钢笔 ， 剩下 的 钱 买 儿童读物 ， 可以 买 几本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21438", "content": "有 甲 、 乙 两筐 苹果 ， 乙 筐 装 24 千克 ， 如果 从 甲 筐 倒 出 25% 给 乙 筐 ， 则 两筐 一样 重 ， 甲 筐 原有 多少 千克 苹果 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10755", "content": "两个 水管 同时 向 池 中 放水 ， 粗 管 每 小时 放水 15 吨 ， 细管 每 小时 放水 11 吨 ， 经过 8 小时 把 水 放满 ， 这个 水池 能 装 多少 吨 水 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13027", "content": "甲 、 乙 两车 分别 从 烟台 和 青岛 同时 出发 ， 甲 的 速度 是 每 小时 52.9 千米 ， 乙 的 速度 是 每 小时 47.1 千米 ， 经过 3.2 小时 两车 相遇 ， 烟台 和 青岛 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10903", "content": "一 只 老虎 重 374.4 千克 ， 是 一只 豹子 重量 的 1.2 倍 ， 一只 熊 的 重量 是 这 只 豹子 重量 的 1.5 倍 ， 这 只 熊 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "137", "content": "一 套 西服 的 价格 是 1800 元 ， 其中 裤子 的 价格 是 上衣 的 (2/3) ， 一条 裤子 的 价格 = 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16836", "content": "组装 一批 电脑 ， 已 装 了 总数 的 40% ， 剩下 的 比 已 装 的 多 300 台 ． 这 批 电脑 共有 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2083", "content": "一 根 绳子 用 去 (1/5) ， 正好 用 去 6 米 ． 绳子 全长 有 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21185", "content": "修 一条 长 10.8 千米 的 公路 ， 计划 15 天 修 完 ， 结果 提前 3 天 完成 任务 ， 实际 每天 比 计划 多 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4180", "content": "两块 布 ， 第一块 长 (1/8) 米 ， 比 第 二 块 短 (4/8) 米 ． 两块 布 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19536", "content": "教室 里 走 了 37 人 ， 又 进来 9 人 ， 这时 教室 里 有 20 人 ， 教室 里 原来 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21602", "content": "李 刚 家 在 肇庆市 康乐 花园 ． 每 上 一层楼 要 走 24 个 台阶 从 一楼 到 李 刚 家 要 走 144 个 台阶 李 刚 家住 在 多少 楼 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1286", "content": "一 个 木 工厂 要 做 2418 套 家具 ， 已经 做 了 15 天 ， 每天 做 130 套 ， 还 剩 多少 套 没有 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8286", "content": "10 米 的 皮尺 ， 减少 了 它 的 (1/10) 后 = 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8146", "content": "某 服装厂 第一 车间 计划 25 天 生产 1275 套 校服 ， 前 5 天 生产 了 195 套 ， 要 在 计划 时间 内 完成 任务 ， 以后 平均 每天 要 比 计划 每天 多 生产 几套 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18658", "content": "计算 （ 18 + 27 ） - 28 / 7 时 ， 先 算 括号 里 的 多少 法 ， 再 算 括号 外面 的 多少 法 ， 最后 算 多少 法 ， 得 多少 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10744", "content": "甲队 有 120 人 ， 乙 队 人数 占 丙 队 人数 的 (3/5) ， 丙 队 人数 占 甲队 的 (2/3) ， 乙 队 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16204", "content": "一 袋 面粉 25 千克 ， 吃掉 它 的 (1/5) ， 还 剩 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22912", "content": "小 玲 问 一 老爷爷 今年 多 大 年龄 ， 老爷爷 说 ： “ 把 我 的 年龄 加上 17 后 用 4 除 ， 再 减去 15 后 用 10 乘 ， 恰好 是 100 岁 ” 那么 ， 这位 老爷爷 今年 多少岁 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "13546", "content": "学校 买来 15 个 排球 和 10 个 足球 ， 共用 去 1190 元 ． 每个 足球 56 元 ， 每个 排球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12397", "content": "(3/5) - (1/2) / 5 的 商 ， 所得 的 差 乘 (6/7) ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5919", "content": "某 发电厂 运 来 一批 煤 ， 原 计划 每天 烧 15 吨 ， 80 天 烧 完 ． 实际 每天 比 原 计划 节约 了 20% ， 实际 烧 了 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14581", "content": "张老师 写 了 几篇 论文 ， 得 稿费 3400 元 ， 按规定 超出 800 元 的 部分 按 14% 缴纳 个人所得税 ， 张老师 缴税 后 实 得 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1621", "content": "6 （ 1 ） 班 有 28 人 参加 了 语文 和 数学 竞赛 ． 参加 语文 竞赛 的 有 15 人 ， 参加 数学 竞赛 的 有 18 人 ， 语 数 竞赛 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2469", "content": "一 根 电线 ， 第一次 用 去 了 它 的 (1/3) ， 第 二 次 用 去 了 它 的 (1/5) ， 还 剩 这根 电线 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12549", "content": "400000000 + 30000 + 5 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6500", "content": "服装 加工厂 用 120 米 的 布 可 做成 人 服装 24 套 ， 如果 做 儿童服装 ， 可 做 30 套 ， 每套 儿童服装 比 成人 服装 少 用布 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20569", "content": "水果店 有 梨子 378 千克 ， 卖出 210 千克 后 ， 又 运 来 一批 ， 现在 水果店 共有 梨子 896 千克 ． 水果店 又 运 来 梨子 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14273", "content": "小 丁丁 去 商店 买 了 4 本 价格 相同 的 练习本 和 3 支 单价 3.5 元 的 原 珠 笔 ， 一 共用 去 13.7 元 ， 练习本 每 本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17405", "content": "一 本书 有 96 页 ， 小 明 第一天 看 全书 的 (1/12) ， 第 二 天 看 的 相当于 第一天 看 的 (1/2) ， 这 本书 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "12427", "content": "爷爷 告诉 小 明 ： “ 当 我 在 你 爸爸 现在 的 这个 年龄 时 ， 你 爸爸 当时 的 年龄 比 你 现在 的 年龄 大 了 3 岁 ． ” 如果 爷爷 、 爸爸 和 小 明 3 人 现在 的 年龄 和 99 岁 ， 则 爸爸 现在 的 年龄 = 多少岁 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17238", "content": "校园 里 有 4 行树 ， 每行 13 棵 ， 春天 又 种 了 一些 树 ， 这样 校园 里 一共 有 69 棵 树 ． 春天 种 了 多少 棵 树 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2278", "content": "某 服装厂 一月份 生产 女 童装 2600 套 ， 生产 的 男 童装 比 女 童装 的 3 倍 少 800 套 ， 生产 男 童装 多少 套 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15660", "content": "13 除 某 数 的 商 比 20 小 7 ， 求 某 数 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22689", "content": "妈妈 去 商场 买鞋 花 了 45 元 ， 占 所 花 总 钱 数 的 (1/5) ， 买 上衣 用 了 总 钱 数 的 (4/15) ， 买 上衣 用 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9031", "content": "比 90 的 (1/2) 多 2 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21630", "content": "甲 、 乙 两艘 轮船 同时 从 苏州 驶向 杭州 ， 4 小时 后 乙 船 落后 甲 船 14 千米 ． 甲 船 每 小时 行 23.5 千米 ， 乙 船 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13242", "content": "百货商店 卖出 5 箱 上衣 ， 每箱 20 件 ， 每件 42 元 ， 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21189", "content": "在 学校 举行 的 手工 比赛 中 ， 六年级 3 班 一共 制作 了 32 件 作品 ， 其中 女生 做 了 总数 的 (5/8) ， 女生 做 了 多少 件 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6732", "content": "被除数 除以 除数 商 是 17 ， 被除数 减去 除数 差 是 160 ， 求 被除数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10792", "content": "除数 是 8 ， 商 是 13 ， 余数 是 5 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5147", "content": "一 个 平行四边形 相邻 两边 的 长 分别 是 10 厘米 和 15 厘米 ， 其中 一条 底边 上 的 高 是 12 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12761", "content": "80 kg 减少 (1/4) 后 = 多少 kg ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2260", "content": "30 个 ★ ， 每 6 个 一份 ， 可以 分成 多少 份 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5469", "content": "王老师 用 160 元 买 3 个 茶杯 ， 营业员 找 了 4 元 ， 每个 茶杯 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1660", "content": "一 个数 除以 27 ， 商 是 9 ， 余数 是 6 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3699", "content": "淮河 的 全长约 是 1000 千米 ， 且 淮河 全长 是 黄河 的 (2/11) ， 那么 黄河 全长约 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21568", "content": "学校食堂 买 回 一批 面粉 ， 第一次 用 去 (1/5) ， 第 二 次 用 40 千克 ， 这时 用 去 的 与 剩下 的 粉 重量 的 比 是 3 ： 2 ， 食堂 共 买 回 面粉 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21983", "content": "甲 、 乙 两个 修路 队 共同 修 一条 路 ． 甲队 每天 修 4.8 千米 ， 修 了 12 天 ， 乙 队 只 修 了 8 天 ， 但 比 甲队 多 修 1.6 千米 ， 乙 队 平均 每天 修 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10176", "content": "一 条 水渠 长 268.55 米 ， 另 一条 水渠 比 它 长 25.48 米 ， 另 一条 水渠 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21679", "content": "修 一条 长 3600 米 的 路 ， 第一天 修 了 全长 的 (4/9) ， 第一天 修 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3962", "content": "一 桶 油 倒 出 一部分 后 ， 剩下 (5/8) ． 剩下 的 5 天 用 完 ， 平均 每天 用 (3/4) 千克 ． 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4090", "content": "用 去 一桶 油 的 40% 后 又 倒入 2 升 ， 这时 桶 里 的 油 和 原来 的 一样 多 ． 这 桶 油 原有 几 升 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1758", "content": "同学 们 进行 团体操 表演 ， 每行 站 15 人 ， 正好 站 20 行 ， 如果 要求 站 30 行 ， 每行 需要 站 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11032", "content": "2001120011 / 20011 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18051", "content": "一 辆 货车 在 高速公路 上 的 速度 是 85 千米 / 时 ， 在 国道 上 的 速度 是 60 千米 时 ． 这辆 车 在 高速公路 和 国道 上 各行 了 12 小时 ， 最后 到达 目的地 ． 这 段 路 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9138", "content": "修 一条 公路 540 千米 ， 已经 修 了 5 天 ， 还 剩 40 千米 ， 平均 每天 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "249", "content": "一 列 长 200 米 的 火车 以 每分钟 800 米 的 速度 通过 某 座 大桥 共用 了 3 分钟 ， 这 座 桥 长 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18825", "content": "一 个 图书馆 有 儿童读物 2.5 万册 ， 其他 读物 是 儿童读物 的 3 倍 少 0.2 万册 ， 其他 读物 有 多少 万册 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12592", "content": "光明 小学 有 学生 840 人 ， 五年级 占 学校 学生 的 (2/7) ， 五年级 的 女生 占 本 年级 的 (5/12) ， 五年级 有 女生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11462", "content": "一 桶 汽油 ， 第一次 用 去 总数 的 30% ， 第 二 次 用 去 总数 的 20% ， 还 剩 50 千克 ． 原来 这 桶 汽油 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6023", "content": "甲 、 乙 两个 工程队 合 铺 一条 148.5 千米 的 公路 ． 甲队 每天 4.5 千米 ， 乙 队 每天 铺 的 是 甲队 的 1.2 倍 ． 两队 合 铺 这 条 公路 需要 多少 天 铺 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22744", "content": "国家 规定 储蓄存款 需 征收 利息税 ， 利息税 的 税率 为 20% ， 小 红 在 银行 存入 人民币 2000 元 ， 定期 一年 年 利息 为 2.25% ， 存款 到期 时 ， 小 红 应交 利息税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "10145", "content": "爸爸 给 舅舅 打 长途电话 一共 花 了 8.4 元 ， 他们 共 通话 12 分钟 ， 平均 每分钟 付费 多少 钱 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21538", "content": "学校 买 粉笔 ， 白粉笔 比 彩色 粉笔 多 42 盒 ， 彩色 粉笔 39 盒 ， 买 了 多少 盒 白粉笔 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1224", "content": "张 先生 购买 体彩 中 了 奖 ， 按规定 交纳 奖金 总额 20% 的 个人所得税 后 ， 得到 了 20 万元 ． 张 先生 这次 中奖 的 奖金 总额 = 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17460", "content": "沿着 池塘 的 一周 种 了 56 棵 柳树 ， 如果 在 相邻 的 两棵 柳树 中间 种 2 棵 桃树 ， 问 一共 有 多少 棵 树 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19540", "content": "买 6 元 一 千克 的 苹果 ， 小 明 的 钱 刚好 能 买 24 千克 ， 如果 买 18 元 一 千克 的 湿 核桃 ， 能 买 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11416", "content": "实验 小学 组织 乒乓球 混合双打 比赛 ， 6 年 一班 派出 5 名 男生 和 6 名 女生 参赛 ， 共有 多少 种 不同 的 组队 方式 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20435", "content": "张 叔叔 到 文具用品 商店 买 了 2 枝 钢笔 ， 每枝 钢笔 18 元 ． 他 付给 营业员 100 元 ， 应 找回 多少 元 ？ （ 列 综合 算式 解答 ）", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3324", "content": "饭店 买来 面粉 (7/8) 吨 ， 第一天 用 去 这 批 面粉 的 (3/14) ， 第 二 天 又 用 去 (3/16) 吨 ， 两天 共用 去 面粉 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "379", "content": "一 个数 的 (5/8) + 60 等于 400 的 (3/4) ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8136", "content": "营业员 误 将 单价 6.4 元 一支 的 钢笔 当作 4.6 元 出售 ， 结果 共 少收 45 元 ． 他 一共 卖 了 这种 钢笔 多少 支 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2823", "content": "学校食堂 原有 大米 3.2 吨 ， 第一周 用 去 了 总数 的 (1/4) ， 第 二 周 用 去 了 (7/10) 吨 ， 还 剩下 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11917", "content": "建设 小学 六年级 有 学生 153 人 ， 体育 达标 人数 占 全年 级 的 (8/9) ， 其中 男生 的 达标 人数 占 达标 总 人数 的 (5/8) ． 男生 达标 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11694", "content": "妈妈 在 粮店 买 了 15 千克 大米 和 5 千克 面粉 ， 付给 售货员 50 元 ， 找回 19 元 ， 已知 面粉 每千克 2 元 ， 大米 每千克 值 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6501", "content": "装订厂 装订 了 语文课 本 1800 本 ， 装订 的 数学 课本 是 语文课 本 的 5 倍 ， 数学 课本 比 语文课 本 多 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3902", "content": "用 7 辆 同样 的 卡车 运货 ， 每天 可 运 56 吨 ， 如果 增加 同样 的 卡车 2 辆 ， 每天 运货 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21043", "content": "爸爸 买 回 一个 大 西瓜 ， 把 它 平均 切成 了 10 块 ， 他 自己 吃 了 4 块 ， 妈妈 吃 了 3 块 ， 小 庆 把 剩下 的 都 吃 完 了 ． 小 庆 吃 了 这个 西瓜 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19776", "content": "甲乙 两队 学生 从 相隔 18 千米 的 两地 同时 出发 相向 而 行 ． 一个 同学 骑 自行车 以 每 小时 15 千米 的 速度 在 两队 之间 不停 地 往返 联络 ． 甲队 每 小时 行 5 千米 ， 乙 队 每 小时 行 4 千米 ． 两队 相遇 时 ， 骑 自行车 的 同学 共 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22708", "content": "张 大伯 用 5 米 长 的 竹竿 测量 自家 鱼塘 水 的 深度 ， 竹竿 插入 水中 后 ， 进入 泥土 部分 是 0.8 米 ， 露出 水面 是 1.36 米 ， 鱼塘 水深 多少 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14391", "content": "甲 、 乙 两车 从 a 、 b 两地 同时 出发 相向 而 行 ， 甲 每 小时 行 60 千米 ， 乙 车 每 小时 行 45 千米 ， 2 小时 后 两车 之间 的 距离 占 a 、 b 两地 距离 的 (2/5) ， 则 a 、 b 两地 相距 多少 千米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11901", "content": "桶 里 装有 80 千克 油 ， 用 去 了 60% ， 用 去 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13334", "content": "一 堆 沙 第一次 运走 它 的 一半多 3 吨 ， 第 二 次 运走 剩下 的 一半 少 2 吨 ， 还 剩 23 吨 ， 这 堆 沙 原来 多少 吨 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "5246", "content": "一 堆 煤运 走 了 25 吨 ， 刚好 是 总 吨数 的 (5/12) ． 若 运走 的 是 总 吨数 的 (3/5) ， 那么 运走 的 = 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17032", "content": "食堂 买来 面粉 450 千克 ， 比 买来 的 大米 少 20% ， 买来 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12902", "content": "一 艘 货船 载有 3200 吨 货物 ， 在 港口 卸下 1850 吨 ， 又 装 上 1000 吨 其他 货物 ． 船上 现在 有 多少 吨 货物 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22599", "content": "王 叔叔 从 家 去 县城 拉 化肥 ， 去 时 每 小时 行 48 千米 ， 用 了 4 小时 ， 回来 时 多用 了 2 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16109", "content": "有 一批 货物 ， 第一天 运走 30% ， 第 二 天 运走 35% ， 第 3 天 运走 35 吨 刚好 运 完 ． 这 批 货物 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17917", "content": "王老师 把 25000 元 存入 银行 ， 定期 一年 ， 年利率 为 3.25% ， 到期 后 可 取回 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12230", "content": "小林 参加 2008 年 小学 “ 奥林匹克 ” 数学 竞赛 ， 整套 试卷 共有 50 道 题 ， 评分标准 是 每 答对 一道 得 2 分 ， 每 答错 一道 题 不但 不 得分 还要 反 扣 1 分 ． 已知 小林 这次 竞赛 得 了 88 分 ， 请 你 帮 小林 算 出 在 这次 竞赛 中 答错 了 几道 题 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12138", "content": "一 根 绳子 剪 去 20% 以后 ， 再 接上 9 米 结果 比 原来 的 绳子 长 10% ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16015", "content": "一 根 绳子 长 3 米 ， 用 去 了 (1/3) 米 ， 还 剩下 多少 米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16774", "content": "饲养场 养鸭 120 只 ， 比 鸡 多 20 只 ， 养 的 鹅 比 鸡 多 230 只 ， 养 鹅 多少 只 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4580", "content": "李 叔 从 县城 开车 去 王 庄 送 化肥 ， 去 时 每 小时 行 40 千米 ， 3 小时 到达 ， 返回 时 只用 了 2 小时 ， 返回 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17588", "content": "东东 看 一本 150 页 的 故事书 ， 已经 看 了 3 天 ， 每天 看 32 页 ． 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22952", "content": "一 堆 煤 ， 用 去 (3/5) ， 剩下 的 是 用 去 大 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10763", "content": "一 项 工程 由 甲队 独 做 63 天 后 再 由 乙 队 独 做 还 需要 28 天 ； 如果 两队 合 做 要 48 天 ； 如果 由 甲队 独 做 要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17587", "content": "新 文书 店 的 文学 书 比 百科 书 多 320 本 ， 销售 一周 后 余下 的 本 数 相同 ， 文学 书 还 剩 (4/5) ， 百科知识 书 卖出 524 本 ． 文学 书 原有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12321", "content": "小 明 去 超市 购物 ， 用 去 了 50 元 ， 用 去 的 钱 是 所 带 钱款 的 (4/5) ， 则 小 明 带 了 多少 元 去 超市 购物 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22555", "content": "在 一条 长 500 米 的 公路 一侧 架设 电线杆 ， 每隔 50 米 架设 一根 ， 若 公路 两端 都 不 架设 ， 共 需 电线杆 多少 根 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9530", "content": "一 个 商人 ， 把 一件 连衣裙 标价 为 680 元 ， 经 打假 人员 鉴别 ， 降 至 100 元 一件 出售 ， 仍 可 赚 25% ， 如 按 原价 出售 ， 则 每件 可 赚 多少 元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22888", "content": "晓 华 3 次 口 算 分别 算 对 了 14 题 、 12 题 、 19 题 ． 平均 每次 算 对 了 多少 题 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16130", "content": "淘气 借 一本 120 页 的 故事书 ， 她 3 天 看 了 这 本书 的 (1/3) ． 看 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13283", "content": "除数 是 7 ， 商 是 570 ， 余数 是 5 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11082", "content": "小 明 和 小 华 去 买 同样 的 练习本 ， 小 明 买 7 本 ， 小 华 买 5 本 ， 小 明 用 的 钱 比 小 华 多 6 角钱 ， 这种 练习本 每 本 = 多少 钱 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22371", "content": "济南 与 青岛 相距 380 千米 ． 大客车 每 小时 行 76 千米 ， 小汽车 每 小时 行 95 千米 ， 两车 同时 从 济南 开往 青岛 ， 小汽车 比 大客车 提前 几小时 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5634", "content": "我们 班 开展 两种 课外 小组 ， 科技 小组 的 有 41 人 参加 ， 美术 小组 的 有 36 人 参加 ， 两个 小组 都 参加 的 有 25 人 ， 另外 还有 3 人 两个 小组 都 没有 参加 ， 请问 全班 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22142", "content": "一 个 匹萨饼 平均 分给 5 个 小朋友 吃 ， 每个 小朋友 吃 到 多少 个 匹萨饼 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5104", "content": "(1/9) 与 (2/3) 的 和 与 一个 数 的 (1/3) 相等 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14311", "content": "一 件 衣服 售价 180 元 ， 比 原价 降低 了 (1/10) ， 降低 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8774", "content": "一 只 圆柱形 水桶 的 容积 是 9.42 立方分米 ， 直径 是 2 分 米 ， 这 只 水桶 的 高 = 多少 分 米 ？", "knowledge": ["*", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "4138", "content": "雨燕 是 长距离 飞行 最快 的 鸟 ． 一只 雨燕 3 小时 飞行 540 千米 ， 一只 信鸽 每 小时 飞行 72 千米 ． 雨燕 飞行 的 速度 是 信鸽 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6241", "content": "咱们 班 有 18 人 参加 了 奥数班 ， 占 全班同学 的 (1/3) ， 参加 英 奥 班 的 人数 占 全班 人数 的 (2/9) ， 参加 英 奥 班 的 同学 有 多少 名 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14340", "content": "100 克 盐水 里 含盐 20 克 ， 盐 占 盐水 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8427", "content": "一 只 普通 的 白炽灯 一年 耗电 约 71.2 千瓦时 ， 如果 换成 亮度 相同 的 节能灯 ， 一年 可以 省 电 55.2 千瓦时 ． 白炽灯 的 耗电量 是 节能灯 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5425", "content": "开学 第一天 ， 5 （ 1 ） 班 12 位 同学 照 合影留念 ． 拍 一次 付 20 元 ， 给 4 张 照片 ， 加洗 一张 另付 2.5 元 ． 如果 每人 要 一张 照片 ， 他们 一共 要 付 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22389", "content": "一 种 音响 原价 1000 元 ， 现 降价 (3/20) 出售 ， 现 售价 为 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7954", "content": "一 个 花坛 ， 每 两盆 兰花 之间 放 3 盆 菊花 ， 从 第 5 盆 兰花 到 第 10 盆 兰花 之间 ， 一共 有 多少 盆 菊花 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22184", "content": "黄 老师 身高 160 厘米 ， 他 比 张 明 高 15 厘米 ， 张 明 高 多少 厘米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "21570", "content": "一 个 平行四边形 形 的 面积 是 80 平方厘米 ， 底 是 20 厘米 ， 高 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20303", "content": "甲乙 两队 学生 从 相隔 18 千米 的 两地 同时 出发 ， 相向 而 行 ， 一名 学生 骑 自行车 以 每 小时 14 千米 的 速度 在 两队 间 不停 的 往返 联络 ， 甲 对 每 小时 行 5 千米 ， 乙 对 每 小时 行 4 千米 ， 两队 相遇 时 ， 骑 自行车 的 学生 共 行 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7057", "content": "学校 买来 彩色 粉笔 35 盒 ， 买来 的 白粉笔 比 彩色 粉笔 多 100% ， 一共 买 粉笔 多少 盒 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19093", "content": "水果店 运 来 桔子 27 筐 ， 每 筐 24 千克 ， 卖掉 459 千克 后 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15118", "content": "某 商店 一共 进 了 95 个 皮球 ， 卖出 37 个 ， 如果 卖出 的 皮球 单价 是 18 元 ， 商店 收入 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3391", "content": "水果 批发市场 运进 苹果 7.2 吨 ， 是 梨 的 1.8 倍 ， 苹果 比 梨 多 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3777", "content": "一 个 圆柱形 蓄水池 ， 底面 半径 是 2 米 ， 高 是 6 米 ， 要是 水面 降低 0.5 米 ， 需要 排水 多少 立方米 ？", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "3189", "content": "狮子 奔跑 时 的 最高 速度 可以 达到 60 千米 / 时 ， 大约 是 猎豹 的 (6/11) ， 猎豹 奔跑 时 最高 时速 大约 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9041", "content": "一 个数 的 (3/5) 是 9 ， 这个 数 的 (7/15) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12164", "content": "某 工程队 修 一条 长 180 千米 的 高速公路 ， 前 5 个 月 修 了 全长 的 (1/4) ， 照 这样 计算 ， 修 完 这 条 公路 共 需 几个 月 ？ （ 请 你 用 最 简便 的 方法 解答 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9447", "content": "学校 兴趣小组 里 歌咏 组 有 48 人 ， 比 美术组 的 3 倍 多 6 人 ， 两个 小组 共有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17759", "content": "按 规律 填 数 ： 3 、 5 、 7 、 11 、 17 、 27 、 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "371", "content": "两个 工程队 合 修 一段 公路 ． 甲队 每天 修 2.82 千米 ， 乙 队 每天 修 3.18 千米 ， 10 天 后 还 剩下 3 千米 没有 修 ． 这 段 公路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16624", "content": "修 一条 1200 km 的 水渠 ， 一月份 修 完全 长 的 (1/3) ， 二 月份 修 完全 长 的 (1/4) ， 还 剩 多少 km ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "122", "content": "食堂 买来 7 桶 油 ， 每桶 油 质量 相等 ． 如果 从 每桶 油 中 各 取出 30.4 千克 油 ， 则 剩下 的 油 与 原来 3 桶 油 的 质量 相等 ． 原来 每桶 油 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12790", "content": "一 条 路 长 20 千米 ， 第一周 修 了 (2/5) ， 第 二 周 修 了 25% ， 还 剩 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5233", "content": "商 和 余数 都 是 8 ， 除数 是 9 ， 被除数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "259", "content": "小 芳 有 45 张 邮票 ， 比 小 华 的 邮票 多 25% ． 小 华 有 多少 张 邮票 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7648", "content": "一 种 服装 原价 120 元 ， 现 降价 30% ， 现在 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18039", "content": "同学 们 做 了 67 朵 大红花 ， 送给 幼儿园 27 朵 ， 剩下 的 大红花 平均 分成 5 份 ， 每份 有 几朵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10334", "content": "甲乙 两辆 汽车 从 相距 324 千米 的 两地 同时 相对 开出 ， 经过 3 小时 后 在 途中 相遇 ， 甲 车 的 速度 是 乙 车 的 (4/5) ， 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5105", "content": "一 根 绳子 的 长度 等于 它 本身 长度 的 (1/5) + 20 米 ， 这 跟 绳子 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9953", "content": "一 个数 的 6 倍 是 78 ， 这个 数 的 8 倍 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10239", "content": "一 列 火车 到达 安溪 站 时 有 983 人 ， 在 安溪 站 下车 的 有 94 人 ， 上车 的 68 人 ． 开出 安溪 站 时 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10408", "content": "李 江 买 2 支 铅笔 和 6 本 练习本 一 共用 了 4.20 元 ， 每支 铅笔 0.60 元 ， 每 本 练习本 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8591", "content": "某 超市 在 今年 第一季度 按 营业额 的 5% 缴纳 营业税 后 ， 税后 余额 为 38 万元 ， 这个 超市 第一季度 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13526", "content": "在 电梯 里 有 3 个 大人 和 2 个 孩子 ． 孩子 的 平均 体重 为 32 kg ， 大人 的 平均 体重 为 62.5 kg ． 电梯 里 所有人 的 平均 体重 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11943", "content": "4 、 五年级 同学 在 “ 清理 白色 垃圾 ， 倡导 低 碳 生活 ” 的 活动 中 ， 四年级 同学 清理 废塑料 (5/7) 千克 ， 比 五年级 少 清理 (2/3) 千克 ， 两个 年级 一共 清理 废塑料 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19407", "content": "松鼠 妈妈 采 松子 ， 晴天 每天 采 20 颗 ， 雨天 每天 采 12 颗 ， 松鼠 妈妈 一连 8 天 一共 采 了 112 颗 ． 请问 这 几天 里 一共 有 几个 雨天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1630", "content": "学校食堂 买 了 8 套 不锈钢 碗 ， 每套 里 装 9 只 ， 共 花 去 216 元 钱 ， 每 只 碗 多少 元 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20505", "content": "小 明 在 商店 买 回 足球 和 篮球 各 24 个 ． 每个 篮球 57 元 ， 每个 足球 43 元 ， 小 明 一共 要 付 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22120", "content": "一 桶 水 用 去 它 的 (3/5) ， 正好 用 去 15 千克 ． 这 桶 水 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14421", "content": "修路 队 计划 用 15 天 修 一条 4800 米 长 的 公路 ． 实际 每天 多 修 80 米 ， 实际 多少 天 就 完成 了 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7009", "content": "某 工厂 计划 用 一年 的 时间 完成 一批 零件 的 生产 任务 ． 第一季度 完成 了 计划 的 (1/4) ， 第 二 季度 完成 了 计划 的 30% ， 正好 比 第一季度 多 生产 400 个 ， 全年 计划 生产 零件 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15696", "content": "宏 城 超市 运进 20 千克 苹果 ， 桔子 的 重量 是 苹果 的 (9/10) ， 葡萄 的 重量 比 桔子 少 (1/3) ， 葡萄 重 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7194", "content": "苹果 比 桃 多 3 kg ， 苹果 的 质量 是 桃 的 1.5 倍 ． 桃 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1613", "content": "爸爸 每月 存款 550 元 ， 6 个 月 后 ， 妈妈 的 存款 比 爸爸 多 了 300 元 ， 妈妈 有 存款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4549", "content": "小 芳 参加 了 5 次 满 分为 100 分 的 数学 测验 ， 其 平均分 是 90 分 ， 请问 小 芳 的 每次 数学 测验 成绩 不会 低 过 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19383", "content": "小 刚读 一本 140 页 的 故事书 ， 第一天 读 了 这 本书 的 (2/7) ， 第 二 天 读 了 这 本书 的 (3/7) ， 还 剩 多少 页 没有 读 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "16148", "content": "锅炉厂 这个 月 每天 用 煤 1.5 吨 ， 比 上个月 每天 节约 约 0.3 吨 ， 那么 原来 可用 20 天 的 煤 ， 现在 要 多用 多少 天 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15135", "content": "一 箱 水果 ， 苹果 有 36 kg ， 梨 的 重量 是 苹果 的 (1/3) ， 桔子 的 重量 是 梨 的 (5/4) ． 这 箱 水果 共 多少 重 ？", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "9016", "content": "“ 清明 ” 期间 ， 义乌 解百 商场 举行 0.8 的 促销 活动 ， 王 丽 买 了 一件 上衣 花 了 160 元 ， 这件 上衣 的 原价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3625", "content": "(14/5) 与 4.5 的 积 的 倒数 比 (15/4) / (1/2) 的 商 少 多少 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12645", "content": "学校 组织 学生 春游 ， 用 4 辆车 3 次 把 全校 672 名 师生 运 完 ． 平均 每辆 汽车 每次 运送 多少 名 师生 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6483", "content": "三年级 同学 种树 80 颗 ， 4 、 五年级 种 的 棵 树 比 三年级 种 的 2 倍 多 14 棵 ， 3 个 年级 共 种树 多少 棵 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6734", "content": "甲乙 两地 相距 490 千米 ， 一艘 轮船 从 甲地 开往 乙地 ， 每 小时 行驶 35 千米 ， 几小时 可以 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14159", "content": "超市 运 来 300 袋 大米 ， 每 袋 25 千克 ， 卖 了 96 袋 后 ， 还 剩下 多少 袋 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "10735", "content": "制造 一种 机床 ， 原来 每 台 用 钢材 (36/25) 吨 ， 现在 每 台 用 的 钢材 比 原来 节约 (1/6) ． 现在 每 台 机床 用 钢材 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16643", "content": "商店 卖出 16 盒 圆珠笔 ， 每盒 10 枝 ， 每枝 3 元 ． 一共 卖 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20045", "content": "某 服装厂 要 加工 一批 套裙 ， 前 4 天 加工 了 120 套 ， 后 5 天 加工 了 150 套 正好 完成 ， 平均 每天 加工 多少 套 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "102", "content": "光明 小学 上 学期 书画 兴趣小组 有 100 人 ， 本学期 有 125 人 ， 本学期 人数 增加 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15254", "content": "实验 小学 订购 《 科技报 》 ， 中年级 订 150 份 ， 高年级 比 中年级 的 1.5 倍 少 30 份 ， 中 、 高年级 共 订购 多少 份 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22889", "content": "13 只 鸡 排成 一队 ， 其中 有 1 只 大公鸡 ， 它 的 前面 有 8 只 鸡 ， 它 的 后面 有 几只 鸡 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14828", "content": "学校 新 购进 一批 书 ， 其中 科普读物 有 320 本 ， 占 全部 图书 的 (1/5) ． 学校 新 购进 图书 多少 本 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4239", "content": "一 件 上衣 38 元 ， 一条 裤子 16 元 ， 买 2 套 这样 的 衣服 ， 共 花 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4557", "content": "有 一瓶 饮料 ， 小 芳 第一次 喝 了 这 瓶 饮料 的 (3/9) ， 第 二 次 喝 了 这 瓶 饮料 的 (2/9) ， 一共 喝 了 这 瓶 饮料 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11695", "content": "工人 师傅 要 修 一条 800 米 长 的 马路 ， 第一天 修 了 274 米 ， 第 二 天 修 了 398 米 ． 两天 一共 修 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20047", "content": "一 本书 共 80 页 ， 第一次 看 了 它 的 (1/4) ， 第 二 次 看 了 余下 的 (2/3) ， 还有 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "6444", "content": "工人 师傅 平均 1 小时 能 检测 235 个 零件 ， 每天 工作 8 小时 ， 一天 共 检测 多少 个 零件 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14550", "content": "一 个 圆柱形 容器 的 底面 半径 是 10 厘米 ， 把 一块 铁 放入 这个 容器 后 ， 水面 上升 2 厘米 ， 这块 铁 的 体积 = ？", "knowledge": ["*", "^"], "difficulty": 0.2, "length": 7}
-{"question_id": "7617", "content": "菜场 运 来 560 千克 白菜 ， 萝卜 比 白菜 多 (2/5) ． 萝卜 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11180", "content": "小 红 家 有 一些 大米 ， 爸爸 说 ： “ 已经 吃 了 20% ， ” 妈妈 说 ： “ 如果 再 买进 30 千克 ， 这时 大米 的 重量 比 原来 多 10% ． ” 小 红 家 原来 有 多少 千克 大米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8658", "content": "运 一批 苹果 ， 每 筐 15 千克 ， 要 装 40 个 筐 ． 如果 改用 新 筐 ， 每个 新 筐 装 苹果 的 重量 是 旧 筐 的 (4/5) ， 需用 多少 个 新 筐 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8812", "content": "小 红 是 集邮 爱好者 ． 如果 在 集邮册 中 每页 放 6 枚 邮票 ， 32 页 就 可以 放 完 ． 如果 每页 放 4 枚 邮票 ， 需要 几页 才能 放 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2551", "content": "一 件 上衣 ， 打 0.8 后 比 现价 便宜 了 70 元 ， 这件 上衣 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18700", "content": "百盛 超市 要 购进 苹果 360 箱 ， 橘子 312 箱 ， 每 96 箱 装 一车 ， 这些 水果 可 装 几辆车 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7564", "content": "甲 数 的 (5/6) 比 乙 数 的 (4/7) 大 2 ， 乙 数 是 14 ， 甲 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18541", "content": "6 台 相同 的 磨面 机 8 小时 可 磨 面粉 33.6 吨 ， 每 台 磨面 机 平均 每 小时 能 磨面 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9876", "content": "从 甲地 到 乙地 ， 货车 要 行 2.25 时 ， 比 客车 多用 0.2 时 ， 小轿车 需要 的 时间 比 客车 还 少 0.65 时 ． 小轿车 从 甲地 到 乙地 需要 多少 时间 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16319", "content": "底 面积 相等 的 两个 圆柱体 ， 甲 圆柱 比 乙 圆柱 高 2 厘米 ， 表面积 大 94.2 平方厘米 ， 乙 圆柱 的 底面 直径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11913", "content": "育才 中学 举行 春季 运动会 ， 男 运动员 人数 占 全体 运动员 人数 的 (5/9) ， 女 运动员 人数 比 男 运动员 的 (3/5) 多 18 人 ． 一共 有 运动员 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2433", "content": "汽车 去 县城 送货 ， 去 时 速度 是 42 千米 / 时 ， 用 了 4 小时 ， 返回 时 的 速度 是 56 千米 / 小时 ， 返回 时 用 了 几小时 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2999", "content": "一 堆 煤 重 45 吨 ， 运走 了 (2/5) ， 还 剩下 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10624", "content": "一 台 收音机 原价 100 元 ， 现在 降价 10% ， 现在 售价 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4204", "content": "五年级 同学 参加 “ 大 健康 ， 大 课间 ” 活动 有 42 人 ， 其中 参加 跳绳 队 的 有 30 人 ， 参加 踢毽子 队 的 有 25 人 ， 并且 每人 至少 参加 一 项 活动 ， 五年级 同学 两项 活动 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14666", "content": "一 套 儿童 演出服 的 价格 是 120 元 ， 裤子 的 价格 是 上衣 的 (3/5) ， 单买 一件 上衣 需要 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12481", "content": "商店 卖出 白菜 250 吨 ， 比 卖出 萝卜 的 (5/6) 少 30 吨 ． 卖出 萝卜 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7532", "content": "甲乙 两车 同时 从 ab 两地 相对 开出 ， 甲 车 每 小时 行 48 千米 ， 乙 车 每 小时 行 54 千米 ， 相遇 时 甲 车 比 乙 车 少 行 72 千米 ． ab 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5029", "content": "两地 相距 54 千米 ， 甲 、 乙 两 人 骑车 分别 从 两地 同时 出发 ， 相向 而 行 ， 经过 (6/5) 小时 相遇 ． 甲 每 小时 行 25 千米 ， 乙 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12074", "content": "“ 6 一 ” 节 ， 书店 的 儿童读物 打 0.8 出售 ， 一套 儿童读物 的 现价 160 元 ， 那么 便宜 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2312", "content": "小 明 乘车 从 孝感 到 汉口 ， 40 分钟 行 了 全程 的 (2/5) ， 从 孝感 到 汉口 汽车 需 行驶 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9363", "content": "我 昨天 看 了 9 页 ， 今天 看 的 和 昨天 一样 多 ， 两天 一共 看 了 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13348", "content": "食堂 买来 大米 和 面粉 的 袋 数 比 是 3 ： 2 ， 大米 买来 180 袋 ， 面粉 买来 多少 袋 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18334", "content": "两个 数 相乘 ， 如果 一个 因数 增加 3 ， 积 就 增加 51 ， 如果 另 一个 因数 减少 6 ， 积 就 减少 150 ， 那么 两个 数 和 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3241", "content": "某 单位 举行 迎春 茶话会 ， 买来 4 箱 同样 重 的 苹果 ， 从 每箱 取出 24 千克 后 ， 结果 各箱 所 剩下 的 苹果 重量 的 和 ， 恰好 等于 原来 一箱 的 重量 ． 那么 原来 每箱 苹果 重 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13398", "content": "37 与 18 的 和 ， 再 乘 48 得 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21322", "content": "8 - 0.7 / 4.4 所得 的 差 再 乘 44 ， 积 = ？ （ 用 综合 式 解 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14093", "content": "一 头牛 重 约 500 千克 ， 一头 大象 的 体重 是 牛 的 6 倍 ， 这 头 大象 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18311", "content": "幼儿园 买来 4 箱 梨 ， 每箱 20 千克 ， 平均 分给 5 个 幼儿班 ， 每班 分 多少 千克 梨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16960", "content": "苹果 的 含水率 是 95% ， 50 千克 苹果 含水 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4981", "content": "校 栽 了 45 棵 杨树 ， 柳树 比 杨树 少 17 棵 ， 水 杉树 比 柳树 多 31 棵 ． 水 杉树 有 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11740", "content": "菜场 运 来 黄瓜 250 千克 ， 运 来 黄瓜 比 西红柿 少 (1/6) ， 运 来 西红柿 和 黄瓜 共 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4919", "content": "运走 一些 花盆 后 ， 剩下 的 和 运走 的 一样 多 ， 运走 36 盆 ， 原来 有 多少 盆 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5383", "content": "一 台 压路机 ， 每分钟 行 50 米 ， 压路 的 宽度 是 5 米 ， 压路机 行驶 15 分钟 ， 能 压 多 大 的 面积 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17100", "content": "玩具厂 要 生产 480 只 玩具 ， 已经 生产 了 3 天 ， 完成 了 90 只 ． 照 这样 计算 ， 完成 这 批 玩具 还要 多少 天 ？ （ 列 综合 算式 解答 ）", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17440", "content": "一 本 数学 大辞典 售价 80 元 ， 利润 是 成本 的 25% ， 如果 把 利润 提高 到 35% ， 那么 应 提高 售价 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17637", "content": "一 列 长 120 米 的 火车 ， 以 每秒 12 米 的 速度 通过 一座 山洞 ， 从 车头 进洞 到 车尾 出 洞 共用 70 秒 ， 这 座 山洞 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1576", "content": "一 个数 的 (5/9) 是 60 ， 这个 数 的 (1/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19654", "content": "晨光 小学 一年级 有 男生 548 人 ， 女生 456 人 ． 已经 检查 身体 的 有 398 人 ， 没 检查 身体 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5018", "content": "一 个 长方体 沙坑 ， 长 4 米 ， 宽 2 米 ， 深 1 分 米 ． 这个 沙坑 的 占地面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5118", "content": "3 千克 苹果 要 25.5 元 ， 5 千克 苹果 要 多少 元 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5842", "content": "往 33 千克 盐 中 加入 多少 千克 的 水 ， 可 得到 含盐 率 33% 的 盐水 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16267", "content": "一 列 火车 从 甲 城 出发 去 乙 城 ， 每 小时 行 145 千米 ， 12 小时 到达 ， 甲乙 两城 间 的 距离 = 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18788", "content": "养殖场 养鸭 360 只 ， 鸡 的 只 数 比 鸭 多 80% ， 养殖场 共 养鸡 、 鸭 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "628", "content": "一 根 绳子 ， 第一次 剪 去 全长 的 (1/6) ， 第 二 次 剪 去 全长 的 (1/5) ． 这根 绳子 共 缩短 了 22 米 ． 这根 绳子 原来 长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18327", "content": "甲 数 是 560 ， 乙 数 是 70 ， 甲 数 是 乙 数 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12196", "content": "有 一位 老人 ， 把 他 今年 的 年龄 加上 16 ， 用 5 除 ， 再 减去 lo ， 最后 用 10 乘 ， 恰巧 100 岁 ， 这位 老人 今年 多少岁 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11953", "content": "一 种 钢材 每 米 重 (8/125) 千克 ， 现在 有 这种 钢材 500 米 ， 共 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22310", "content": "一 堆 煤 有 220 吨 ， 第一天 运走 总数 的 (1/5) ， 第 二 天 运走 总数 的 (1/4) ， 这时 还 剩下 多少 吨 没有 运走 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21768", "content": "尧 塘 小学 鼓号 队 有 男生 10 人 ， 女生 比 男生 多 (1/5) ， 女生 比 男生 多 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2503", "content": "超市 原来 有 126 瓶 水 ， 又 新 进 26 箱 ， 每箱 40 瓶 ， 超市 现在 一共 有 多少 瓶 水 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4037", "content": "爸爸 从 菜场 买 回 2.4 千克 肉 ， 每千克 26.5 元 ， 还 买 回 1.5 千克 鸡蛋 ， 每千克 64 元 ， 爸爸 一 共用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "13130", "content": "一 件 外衣 ， 现价 98 元 ， 比 原来 降低 了 30% ， 原来 这件 衣服 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19477", "content": "一 批 货物 ， 已经 运走 了 总数 的 (7/9) ， 余下 的 要 2 天运 完 ， 平均 每天 要 运 这 批 货物 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18481", "content": "一 个 警察 以 每分钟 65 米 的 速度 到 一 案发 地 破案 ， 出发 时 带 着 一只 警犬 ， 警犬 在 两地 间 以 每 分 100 米 的 速度 来回 奔跑 ， 当 到达 3900 米 的 案发 地 时 ， 警犬 也 同时 到达 ， 警犬 跑 的 路程 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "418", "content": "一 个 乘数 是 4 ， 另 一个 乘数 是 2 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13393", "content": "9 月份 小 刚 买 学习用品 花 了 自己 零用钱 的 (5/12) ， 买 杂志 花 了 零用钱 的 (1/5) ， 剩下 的 零用钱 全部 捐给 灾区 的 小朋友 ， 小 刚 向 灾区 捐款 的 钱 占 自己 零用钱 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3798", "content": "在 一个 比例 里 ， 两个 内 项 互为 倒数 ， 其中 一个 外 项 是 (2/5) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16448", "content": "一 个 修路 队 ， 3 天 修路 420 米 ， 照 这样 计算 ， 还要 5 天 完成 ， 这 条 路 长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4312", "content": "育才 学校 新 教学楼 实际 投资 180 万元 ， 比 计划 节约 了 20 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17107", "content": "参观 科技馆 的 一共 有 456 人 ， 其中 儿童 人数 是 成人 的 2 倍 ． 成人 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11481", "content": "果品 公司 存储 一批 苹果 ， 售出 这 批 苹果 的 30% 后 ， 又 运 来 160 箱 ， 这时 比 原来 存储 的 苹果 多 (1/10) ， 这时 有 苹果 多少 箱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20141", "content": "303 班 有 25 人 ， 许多 同学 参加 了 课外 小组 ． 参加 音乐 组 的 有 12 人 ， 参加 美术组 的 有 10 人 ， 两个 组 都 没 参加 的 有 6 人 ． 既 参加 音乐 组 又 参加 美术组 的 有 多少 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5779", "content": "甲 、 乙 两班 共有 学生 104 人 ， 乙 、 丙 两班 共有 学生 106 人 ， 丙 、 丁 两班 共有 学生 101 人 ． 甲 、 丁 两班 共有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20466", "content": "一 件 羽绒服 原价 450 元 ， 现在 0.8 出售 ， 买 一件 这样 的 羽绒服 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5661", "content": "某 农场 计划 收割 水稻 224 公顷 ， 前 3 天 收割 了 84 公顷 ， 照 这样 计算 ， 剩下 的 水稻 还 需要 多少 天 才能 收割 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8931", "content": "6 年 二 班 第一组 有 6 名 男同学 ， 他们 的 身高 分别 是 148 厘米 、 139 厘米 、 146 厘米 、 153 厘米 、 156 厘米 、 149 厘米 ． 这 组 男同学 的 平均 身高 = 多少 厘米 ？", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "17631", "content": "一 个 三角形 的 底 是 6 厘米 ， 高 是 3 厘米 ， 与 它 等 底 等 高 的 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7386", "content": "一 个数 的 (2/5) 是 18 ， 这个 数 的 (4/9) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8519", "content": "某种 型号 的 手机 ， 连续 两次 降价 10% 后 的 价格 相当于 原价 的 多少 % ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "1971", "content": "粮店 运 来 面粉 和 大米 各 200 袋 ． 面粉 每 袋 重 25 千克 ， 大米 每 袋 重 50 千克 ． 运 来 面粉 和 大米 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6001", "content": "陈 悦 本学期 数学 单元 考试成绩 经 统计 ： 得 100 分 1 次 ， 得 98 分 3 次 ， 其余 2 次 共 得 188 分 ． 请 计算 他 本学期 数学 单元 考试 的 平均分 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14850", "content": "5 千克 大米 14 元 钱 ， 买 5.4 千克 同样 的 大米 应付 多少 元 钱 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12897", "content": "一 个 农场 用 拖拉机 耕地 ， 4 台 3 天 耕地 38.4 公顷 ， 平均 每 台 拖拉机 每天 耕地 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5569", "content": "明明 读 一本 故事书 ， 第一天 读 了 全书 的 (2/5) ， 第 二 天 比 第一天 多 读 12 页 ， 这时 已 读 的 页数 与 剩下 页数 的 比 是 5 ： 1 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3072", "content": "石泉 乡 去年 造林 60 公顷 ， 超过 原 计划 的 50% ． 原 计划 造林 多少 公顷 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1391", "content": "本期 数学 新 课 共有 26 个 练习 ． 开学 时 ， 王老师 打算 每周 完成 (1/15) 的 新 内容 ， 国庆 假 、 中秋节 放假 约 1 个 星期 ． 那么 ， 按计划 王老师 将 在 第 多少 周 结束 新 课 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18167", "content": "一 辆 汽车 开往 乙地 ， 如果 把 车速 提高 20% ， 那么 可以 比 原定 时间 提前 1 小时 到达 ， 现在 行 完全 程 要 几小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16270", "content": "(1/5) + (3/5) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6479", "content": "特快 列车 5 时 可行 800 千米 ， 它 的 速度 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21447", "content": "某 农场 要 收割 2300 公顷 小麦 ， 原 计划 每天 收割 60 公顷 ， 收割 5 天 后 改为 每天 收割 80 公顷 ， 还 需要 多少 天 才能 完成 任务 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8757", "content": "学校 生物 小组 制作 昆虫 标本 36 件 ， 制作 的 植物 标本 比 昆虫 标本 的 2.5 倍 少 3 件 ． 生物 小组 制作 植物 标本 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17334", "content": "一 批 木料 ， 做 课桌 可以 做 20 张 ， 做 椅子 可以 做 30 把 ． 这 批 木料 可以 做 几套 这样 的 课桌椅 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19427", "content": "把 14 个 苹果 平均 分成 7 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3733", "content": "三年级 同学 去 劳动 ， 男生 32 人 ， 女生 28 人 ． 如果 每 3 人 分成 一组 ， 一共 可以 分 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14474", "content": "二年级 一班 有 8 本 边 环 画 ， 故事书 是 连环画 的 3 倍 ． 故事书 比 连环画 多 几本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4287", "content": "公园 里 有 16 只 白鹤 ， 144 只 白天鹅 ， 白天鹅 的 只 数 是 白鹤 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4228", "content": "一 件 大衣 打 0.85 后 价格比 原来 便宜 了 75 元 ， 这件 大衣 原来 价格 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7924", "content": "1 - (1/7) = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7250", "content": "植树 队 在 一 星期 中 前 4 天 共 植树 84 棵 ， 后 3 天 共 植树 147 棵 ， 植树 队 在 这 星期 中 平均 每天 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8245", "content": "校园 里 有 柳树 60 棵 ， 比 杨树 少 (1/5) ， 杨树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5151", "content": "已知 两个 因数 的 积 是 10.64 ， 其中 一个 因数 是 1.9 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16518", "content": "2 个 (4/5) / 8 所得 的 商 ， 乘 4 的 倒数 ， 结果 = ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11480", "content": "体育老师 买来 2 箱 乒乓球 ， 每箱 24 筒 ， 每 筒 6 个 ， 一共 买来 多少 个 乒乓球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3479", "content": "有 一个 长方体 木块 ， 长 10 分 米 ， 宽 8 分 米 ， 高 6 分 米 ， 现 将 它 加工 成 一个 最大 的 正方体 ， 削去 的 木料 = 多少 立方分米 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "17494", "content": "甲 、 乙 两包 糖 的 重量 比 是 4 ： 1 ， 如果 从 甲 包 取出 10 克 放入 乙 包 后 ， 甲乙 两包 糖 的 重量 比 变为 7 ： 5 ， 那么 两包 糖 的 重量 和 = 多少 克 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1266", "content": "修 一条 水渠 ， 总长 24 千米 ． 开工 3 天 修 了 1.5 千米 ． 照 这样 计算 ， 修 完 这 条 水渠 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "710", "content": "学校 合唱队 有 男生 18 人 ， 比 女生 多 6 人 ， 女生 有 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15797", "content": "一 台 洗衣机 ， 现在 售价 是 1700 元 ， 比 原价 便宜 了 15% ， 比 原价 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15693", "content": "157.8 * 5.78 + 2578 * 0.422 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12190", "content": "从 北京 到 上海 的 列车 上 有 乘客 1563 人 ， 到 济南 站 下车 259 人 ， 上车 284 人 ， 这时 车上 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10466", "content": "食堂 运 来 4 车 白菜 ， 每 车 395 千克 ， 吃 了 636 千克 ． 还 剩 多少 千克 白菜 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "159", "content": "王师傅 加工 了 180 个 零件 ， 经 检验 合格率 是 95% ， 不 合格 的 有 多少 个 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14597", "content": "一 袋 大米 ， 吃 去 它 的 (1/3) ， 正好 剩余 20 千克 ． 这 袋 大米 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14478", "content": "甲 数 比 乙 数 少 208 ， 乙 数 是 1999 ， 甲 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19683", "content": "甲 仓库 存 粮食 180 吨 ， 乙 仓库 存 粮食 120 吨 ， 甲 仓库 运出 一部分 到 乙 仓库 后 ， 乙 仓库 与 甲 仓库 的 粮食 比 7 ： 3 ． 甲 仓库 运 了 多少 吨 粮食 到 乙 仓库 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "19886", "content": "小强 读 一本 故事书 ， 第一天 读 了 24 页 ， 占 全书 的 (1/5) ， 第 二 天 读 了 全书 的 35% ， 还 剩 多少 页 没 读 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2215", "content": "2009 * 8 与 11 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16297", "content": "一 次 数学 竞赛 ， 测试题 只有 两道 ， 结果 全班 只有 17 人 全 对 ， 做 对 第 二 道 题 的 有 26 人 ， 做 错 第一道 题 的 共 33 人 ， 两 题 都 错 的 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20035", "content": "甲 数 是 200 ， 乙 数 比 甲 数 大 20% ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22254", "content": "一 台 电脑 降价 8% 后 ， 售价 为 5060 元 ， 这 台 电脑 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13423", "content": "东林 小学 要 为 4 、 五年级 的 每个 同学 购买 一本 价格 是 12 元 的 阅读 辅导书 ． 已知 四年级 有 124 人 ， 五年级 有 128 人 ， 两个 年级 一共 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2946", "content": "12 与 21 的 和 乘 (4/3) ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10774", "content": "小 红 今年 重 22 千克 ， 比 去年 增加 了 10% ， 她 去年 的 体重 = 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9611", "content": "有 960 个 杯子 ， 把 这些 杯子 装进 包装箱 中 ， 每 12 个 装 一盒 ， 每 8 盒装 一箱 ． 一共 可以 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10672", "content": "某 厂 4 月份 实际 生产 洗衣机 5000 台 ， 比 计划 超产 1000 台 ． 实际 完成 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14006", "content": "两个 因数 的 积 是 0.45 ， 其中 一个 因数 是 1.5 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1177", "content": "春风 饭馆 买来 西红柿 和 黄瓜 各 17 箱 ． 西红柿 每箱 15 千克 ， 黄瓜 每箱 25 千克 ． 西红柿 和 黄瓜 共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5609", "content": "学校 图书馆 有 360 本书 ， 其中 (1/4) 是 故事书 ， (1/3) 是 科技 书 ． 故事书 和 科技 书 各 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5711", "content": "修 一条 长 5 千米 的 水渠 ， 第一天 修 了 (3/10) ， 第 二 天 修 了 余下 (2/5) ， 还有 多少 米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "8176", "content": "一 个数 的 (1/2) 比 它 的 (1/3) 多 15 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13333", "content": "甲乙 两 人 加工 零件 ． 甲 每 时 加工 65 个 ， 乙 每 小时 加工 75 个 ， 两 人 加工 12 个 小时 ， 一共 加工 了 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19157", "content": "丰乐 村 挖 一个 长方形 蓄水池 ， 长 30 米 ， 宽 20 米 ， 平均 深度 是 3 米 ． 这个 蓄水池 的 占地面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13104", "content": "一 个 奶牛场 有 25 头 奶牛 和 15 头 小牛 ， 每 头 奶牛 每天 吃 草 12 千克 ， 每 头 小牛 每天 吃 草 6 千克 ． 现有 草 7020 千克 ， 可 供 它们 吃 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11782", "content": "两个 工程队 同时 合 开 一条 1500 米 的 隧道 ， 甲 工程队 在 一端 开工 ， 每天 挖 14 米 ， 乙 工程队 在 另一端 开工 ， 每天 挖 16 米 ， 多少 天 后 隧道 可以 挖通 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13926", "content": "甲地 到 乙地 相距 750 千米 ， 一辆 汽车 从 甲地 驶向 乙地 ， 已经 行 了 全程 的 (4/5) ． 这时 离 乙地 还有 多少 千米 没有 行 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20975", "content": "学校 买来 268 本 练习本 ， 原来 还有 384 本 ， 现在 一共 有 多少 本 练习本 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21194", "content": "某 书店 上个月 的 营业额 是 50 万元 ． 如果 按 营业额 的 5% 缴纳 营业税 ， 该店 上个月 应 缴纳 营业税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10723", "content": "一 个 长方体 玻璃 容器 ， 从 里面 量 ， 长 是 7 分 米 ， 宽 是 3 分 米 ， 高 是 8 分 米 ， 向 这个 容器 中 注水 ， 容器 中 的 水 所 形成 的 长方体 第一次 出现 一组 相对 的 面 是 正方形 时 ， 水 的 体积 = 多少 立方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4338", "content": "一 个 蛋糕 小 红 吃 了 (3/5) ， 还 剩 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2683", "content": "五年级 一班 45 名 同学 去 照 合影 ， 定价 32 元 ， 共 4 张 照片 ． 另外 加印 一张 照片 是 1.2 元 ． 如果 每人 要 一张 照片 ， 一共 要 付 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7089", "content": "车间 要 装订 40000 本书 ， 已经 装订 了 7500 本 ． 如果 剩下 的 书 要求 25 天 装订 完 ， 平均 每天 装订 多少 本 才能 按时 完成 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13776", "content": "1 千克 苹果 的 价格 是 (5/2) 元 ， 妈妈 买 了 (9/10) 千克 ． 用 去 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20549", "content": "一 个 圆柱体 的 侧 面积 是 9.42 平方厘米 ， 高 是 3 厘米 ， 它 的 底面 直径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20737", "content": "一 种 手机 ， 现在 售价 是 1200 元 ， 比 原来 降低 了 400 元 ． 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18146", "content": "六年级 有 学生 360 人 ， 男生 与 女生 人数 比 是 5 ： 4 ． 六年级 男生 人数 比 女生 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3975", "content": "把 (3/4) 千克 橙汁 ， 装入 一些 小瓶 ， 每个 小瓶 能 装 (1/4) 千克 ， 需要 多少 个 这样 的 小瓶 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11347", "content": "一 辆 汽车 2 小时 行驶 160 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 共 行驶 8 小时 ． 甲乙 两地 之间 的 公路 长 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5125", "content": "两个 因数 的 积 是 480 ， 一个 因数 不变 ， 另 一个 因数 除以 3 ， 积 变成 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8688", "content": "小 明 步行 的 速度 是 65 米 / 分 ， 他 从 家 到 学校 要 步行 25 分钟 ， 请问 ： 小 明 家 离 学校 有 多 远 ？ （ 提示 ： 速度 s ù d ù * 时间 sh í ji ā n ﹦ 路程 l ù ch é ng ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21737", "content": "饲养 组 养 了 48 只 小兔 ， 每个 笼子 里 放 4 只 ， 一共 需要 多少 只 笼子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18784", "content": "一 把 椅子 12 元 ， 一张 桌子 的 价钱 是 一把 椅子 的 5 倍 ， 买 这样 一套 桌椅 ， 需要 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13329", "content": "某校 的 数学 兴趣小组 ， 女生 人数 的 (2/5) 相当于 男生 人数 的 25% ． 已知 男生 有 24 人 ， 女生 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9444", "content": "小 梅 划 一条 小船 向 上游 划 去 ， 将 草帽 放在 了 船尾 ， 草帽 被 风吹 进 了 河 中 ， 当 他 发现 并 调 过 船头 时 ， 草帽 已 与 船 相距 1 千米 ， 若 船 是 以 每 小时 5 千米 的 速度 行驶 ， 水流 速度 每 小时 2 千米 ， 那么 ， 他 追 上 草帽 需要 几小时 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17993", "content": "甲 、 乙 、 丙 3 人 行走 的 速度 依次 分别 为 每分钟 30 米 、 40 米 、 50 米 ． 甲 、 乙 在 a 地 ， 丙 在 b 地 ， 同时 相向 而 行 ， 丙 遇 乙 后 10 分钟 和 甲 相遇 ． 求 a 、 b 两地 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "3427", "content": "学校 科技 组 有 23 名 同学 ， 美术组 有 13 名 ， 书法 组 的 人数 是 美术组 的 2 倍 ． 书法 组 的 人数 比 科技 组 多 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18110", "content": "仓库 里 有 一批 粮食 ， 运走 (1/5) 后 ， 又 运进 150 吨 ， 这时 仓库 里 的 粮食 吨数 是 原来 的 (7/5) 倍 ， 仓库 里 原有 粮食 多少 吨 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21334", "content": "街心公园 里 有 杨树 60 棵 ， 是 槐树 棵 数 的 (3/4) ， 柳树 棵 数 是 槐树 棵 数 的 (3/5) ． 公园 里 有 柳树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2807", "content": "欧 欧 看 一本 《 东游记 》 故事书 ， 每天 看 6 页 ， 10 天 看 了 这 本书 的 一半 ． 后来 他 每天 都 比 前一天 多 看 2 页 ， 最后 一天 看 了 16 页 ， 那么 他 要 看 完 这 本书 ， 一共 需要 多少 天 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17798", "content": "一 台 微波炉 原价 840 元 ， 提价 (3/10) 后 又 降价 (1/7) ， 现在 这 台 微波炉 的 售价 = 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17150", "content": "一 个 长方体 水箱 ， 从 它 的 里面 量 得 它 的 底面 长 是 3.6 dm ， 宽 2.4 dm ． 已知 它 能 容纳 43.2 l 水 ， 这个 水箱 有 多 高 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16896", "content": "果园 里 有 苹果树 108 棵 ， 苹果树 的 棵 数 是 桃树 的 3 倍 ． 桃树 和 苹果树 一共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10999", "content": "王老师 为 一年级 的 小朋友 买票 ， 一共 花 了 210 元 ， 每张 票 5 元 ， 一年级 一共 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11635", "content": "陈 大伯 向 山西 风味小吃 运 来 白菜 25 kg ， 运 来 的 西红柿 比 白菜 少 (1/5) ． 请问 运 来 西红柿 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14045", "content": "庄浪 一小 图书馆 室 有 故事书 708 本 ， 比 科技 书 多 139 本 ， 两种 书 一共 有 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12793", "content": "东湖 小学 美化 校园 ， 工人 叔叔 用 3 小时 粉刷 墙壁 180 平方米 ， 占 所 要 粉刷 墙壁 面积 的 (2/3) ， 工人 叔叔 粉刷 完 还要 多少 小时 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14890", "content": "一 个 网站 举办 “ 2013 年 春晚 我 最 喜欢 的 节目 ” 调查 活动 ， 其中 喜欢 小品 和 歌舞 的 观众 共有 9600 人 ， 喜欢 小品 的 观众 人数 是 喜欢 歌舞 的 3 倍 ． 喜欢 歌舞 的 观众 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "630", "content": "李 明 看 一本 225 页 的 童话集 ． 前 5 天 每天 看 24 页 ． 以后 每天 看 35 页 ， 再 用 几天 可以 看 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12532", "content": "甲 数 是 6 ， 乙 数 是 甲 数 的 9 倍 ， 乙 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19978", "content": "甲 、 乙 、 丙 3 个 班 ， 甲班 有 50 人 ， 乙班 是 甲班 的 (9/10) ， 丙 班 是 乙班 的 (8/9) ． 丙 班 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16393", "content": "用 一口 平底锅 煎饼 ， 煎 一张 饼 需要 8 分钟 （ 正 、 反面 各 4 分钟 ） ， 每次 可以 煎 3 张 ， 煎 7 张 饼 需要 多少 分钟 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15889", "content": "一 块 地 (2/3) 公顷 ， 其中 (1/5) 种 西红柿 ， (1/3) 种 黄瓜 ， 剩下 的 种 青菜 ， 种 青菜 的 面积 占 这块 地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14236", "content": "一 本 故事书 一共 有 98 页 ， 小 明 看 了 8 天 后 还 剩下 18 页 ， 他 平均 每天 看 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6890", "content": "实验 小学 五年级 植树 120 棵 ， 四年级 植树 的 棵 数 比 五年级 少 (1/4) ， 六年级 比 四年级 多 (1/9) ， 六年级 植树 多少 棵 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3689", "content": "朱 老师 到 国光 超市 买 了 件 打 0.85 的 西装 680 元 ， 比 打折 前 优惠 了 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5438", "content": "小 杰 从 甲地 上山 越过 山顶 下山 到 乙地 ． 他 上山 每 小时 行 2 千米 ， 下山 每 小时 行 5 千米 ， 从 甲地 到 乙地 共用 4.5 小时 ， 按 原 路 返回 用 了 2.5 小时 ， 求 甲 、 乙 两地 之间 的 距离 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16016", "content": "汽车轮胎 的 外 直径 是 1.02 米 ， 每分钟 转 50 周 ， 车轮 每分钟 前进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22181", "content": "小 东 从 家 到 学校 ， 如果 每 分 走 75 米 ， 要 12 分钟 到达 ； 现在 要 提前 2 分钟 到达 ， 每 分 要 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8074", "content": "算式 2012 - 2.4 * 2.6 * 50 的 计算结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10572", "content": "李 大伯 饲养 鸡 的 只 数 的 60% 与 鹅 的 只 数 的 (4/5) 相等 ． 已知 李 大伯 饲养 了 120 只 鸡 ， 那么 李 大伯 饲养 了 多少 只 鹅 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6472", "content": "彩电 生产 中心 4 月份 计划 生产 彩电 1200 台 ， 10 天 完成 了 计划 的 40% ， 完成 计划 任务 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22078", "content": "纳税 是 每个 公民 应 尽 的 义务 ． 做 服装 生意 的 李 叔叔 上 月 营业额 是 9800 元 ， 如果 按 5% 的 税率 缴纳 营业税 ， 李 叔叔 上 月 应 缴纳 营业税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "562", "content": "今年 的 人均收入 是 去年 的 105% ， 就是 今年 的 生产 值 比 去年 的 增长 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11610", "content": "哲 商 小学 五年级 一个 班级 有 60 名 学生 ， 其中 (1/6) 的 同学 爱好 画画 ， 其中 (3/5) 的 同学 爱好音乐 ， 这 两种 都 不 喜欢 的 有 25 人 ， 这 两种 都 喜欢 的 有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "2123", "content": "两个 数 的 差 是 13.6 ， 如果 被减数 增加 2.5 ． 减数 减少 1.5 ， 差 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8491", "content": "新华书店 新 购进 文艺 书 125 本 ， 科技 书 是 文艺 书 的 6 倍 ， 学生 用书 是 科技 书 的 8 倍 ， 学生 用书 购进 了 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1738", "content": "甘蔗 的 出 糖 率 是 23% ， 要 用 多少 千克 甘蔗 才能 榨出 55.2 千克 的 糖 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7736", "content": "1.8 与 2.5 的 积 除以 0.9 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5310", "content": "本月 比 上 月 节约用电 (1/8) ， 本月 用电 是 上 月 用电 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17842", "content": "将 1 元 平均 分给 4 个人 每人 得 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5791", "content": "一 项 工程 ， 计划 投资 20 万元 ， 实际 投资 比 计划 节约 了 2 万元 ， 实际 投资 相当于 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4987", "content": "一 个 长方体 的 底 面积 是 18 dm ^ 2 ， 高 是 5 dm ， 它 的 体积 = 多少 dm ^ 3 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13321", "content": "水果店 运 来 一批 水果 ． 其中 50% 是 苹果 ， 30% 是 梨 ， 并且 苹果 比 梨 多 400 千克 ． 水果店 一共 运 来 多少 千克 水果 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9487", "content": "李 霖 看 一本 故事书 ， 第一天 看 了 120 页 ， 比 第 二 天 多 看 了 (1/5) ． 李 霖 两天 一共 看 了 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11911", "content": "某 建筑工地 原有 水泥 37 吨 ， 又 运 来 187 吨 水泥 ， 这些 水泥 刚好 够用 8 天 ， 这个 工地 平均 每天 用 多少 吨 水泥 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "359", "content": "某 电信公司 为 手机用户 新 推出 了 两种 业务 ． a 种 ： 每月 先 给 月租费 15 元 ， 然后 拨打 电话 每分钟 0.2 元 ； b 种 ： 免 月租费 ， 拨打 电话 每分钟 0.35 元 ． 每月 拨打 多少 分钟 ， 两种 业务 所 付费 用 相同 ． 如果 王 总 每月 拨打 电话 在 500 分钟 以上 ， 他 选择 多少 种 业务 比较 合适 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8901", "content": "一 辆 汽车 从 a 城 去 b 城 ， 走 高速公路 的 速度 是 90 千米 / 小时 ， 用 了 2 小时 ， 公路 返回 时 走 普通 公路 的 速度 是 70 千米 / 小时 ， 用 了 3 小时 ， 走 普通 公路 比 走 高速 多 走 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6762", "content": "一 堆 煤 用 去 (2/5) 正好 剩 45 吨 ， 这 堆 煤 原有 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21286", "content": "小 明 现在 的 体重 是 36 千克 ， 是 刚出生 时 的 9 倍 ， 小 明 现在 比 刚出生 时 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16655", "content": "一 共有 12 张 连 号 的 火车票 ， 王 军 想 拿 3 张 连 号 的 票 ， 一共 有 多少 种 不同 的 拿 法 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5610", "content": "用 2 的 平方 减去 2.5 的 倒数 ， 所得 的 差 去除 120 ， 商 = ？ （ 列式 解答 ）", "knowledge": ["-", "/", "^"], "difficulty": 0.3, "length": 9}
-{"question_id": "21379", "content": "一 桶 油 ， 第一次 倒 出 40% ， 第 二 次 比 第一次 少 倒 出 13 千克 ， 这时 还 剩 27 千克 ， 这 桶 油 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9494", "content": "18 / 1.5 - (1/2) * 0.2 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18701", "content": "供应站 运 来 350 瓶 鲜奶 ， 运 来 的 酸奶 瓶 数 是 鲜奶 瓶 数 的 1.3 倍 ， 运 来 的 果味 奶 的 瓶 数 比 酸奶 还 多 20 瓶 ， 运 来 果味 奶 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8766", "content": "电视机厂 上午 生产 电视机 274 台 ， 下午 生产 196 台 ， 这 一天 生产 多少 台 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17122", "content": "10 吨 煤 ， 用 去 (4/5) 吨 ， 还 剩 多少 吨 煤 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7404", "content": "一 台 播种机 的 滚筒 是 一个 圆柱体 ， 底面 直径 和 筒 长 都 是 1 m ， 滚动 300 圈 共 可 播种 多少 m ^ 2 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "6639", "content": "一 种 股票 昨天 的 收盘价 16 元 ， 今天 的 收盘价 15.2 元 ， 下跌 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15596", "content": "王老师 从 新华书店 买来 科技 书 、 文艺 书 各 12 本 ， 科技 书 每 本 5.75 元 ， 文艺 书 每 本 4.25 元 ， 王老师 一 共用 去 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7508", "content": "要 加工 2500 个 零件 ， 已经 加工 好 1420 个 ， 剩下 的 4 天 加工 完 ， 平均 每天 加工 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5264", "content": "果园 今年 收 水果 21.6 吨 ， 比 去年 增产 80% ， 今年 水果 增产 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19107", "content": "服装 批发店 的 一种 儿童服装 进价 每套 48.5 元 ， 售价 为 每套 68 元 ， “ 6 • 一 ” 前 一周 卖出 这种 服装 120 套 ， 扣除 各种 费用 880 元 ， 还 能 赚 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14764", "content": "学校 买 回 4 个 篮球 ， 每个 45 元 ； 6 个 足球 ， 每个 38 元 ， 一共 花 了 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8699", "content": "一 个 木 工厂 要 做 2418 套 家具 ， 已经 做 了 150 天 ， 每天 做 13 套 ， 还 剩 多少 套 没有 做 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5327", "content": "甲 、 乙 两车 同时 从 ab 两地 相对 开出 ， 甲 车 每 小时 行 60 km ， 乙 车 每 小时 行驶 全程 的 10% ， 当 乙 车 行驶 到 全程 的 (2/5) 时 与 甲 车 相遇 ， 求 甲乙 两地 的 距离 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10733", "content": "小 明 看 一本 故事书 ， 第一天 看 了 全书 的 (1/9) ， 第 二 天 看 了 24 页 ， 两天 看 了 的 页数 与 剩下 页数 的 比 是 1 ： 4 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10092", "content": "一 列 “ 高铁 ” 火车 的 最高 时速 是 350 千米 ， “ 动车 ” 的 最高 时速 是 它 的 (5/7) ， “ 动车 ” 的 最高 时速 是 特快 火车 的 (5/3) ． 一列 特快 火车 的 最高 时速 = 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6498", "content": "把 一个 边长 为 一个 6 cm 的 正方形 剪成 一个 最大 的 圆 ， 则 圆 的 周长 为 多少 cm （ π 取 3.14 ）", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6981", "content": "已知 甲 、 乙 两 数 的 和 是 20 ， 甲 数 是 9.05 ， 乙 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18250", "content": "读 一本 科技 书 ， 每天 读 它 的 (3/8) ， 多少 天 可以 读完 这 本书 的 (3/4) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17198", "content": "文明 小学 六年级 有 150 人 ， 要 选出 (1/6) 的 学生 参加 数学 竞赛 ． 其中 女同学 占 (2/5) ， 参赛 的 女生 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19755", "content": "把 一块 棱 长 是 0.5 米 的 正方体 钢坯 ， 锻 成 横截面 面积 是 0.05 平方米 的 长方体 钢材 ， 锻 成 的 钢材 有 多少 长 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13360", "content": "一 个 修路 队 第一天 修 一段路 的 (2/7) ， 第 二 天 修 第一天 的 (1/2) ， 这时 再 修 1400 米 就 休 完全 路 ， 这 路 有 多长 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10600", "content": "某 粮食 生产 专业户 ， 去 年产 小麦 80 吨 ， 今年 产 小麦 110 吨 ， 今年 比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18829", "content": "某 工程队 修 一段 公路 ， 原 计划 每天 修 800 米 ， 15 天 完成 ， 实际 每天 多 修 200 米 ， 实际 多少 天 完成 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2766", "content": "学校 为 同学 们 体检 ， 测 得 张 强 的 身高 是 1.2 米 ， 刘 松 的 身高 是 1.1 米 ． 张 强 比 刘 松 高 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14013", "content": "一 个 圆柱 的 底 面积 是 12.56 平方厘米 ， 体积 是 6.28 立方厘米 ， 它 的 高 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7527", "content": "小 刚 的 妈妈 每月 工资 2400 元 ， 按 税法 规定 ， 每月 工资 扣除 1600 元 以后 ， 按 余额 的 5% 交纳 个人所得税 ， 小 刚 的 妈妈 每月 应 上缴 税金 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12129", "content": "一 个数 (1/3) 比 这个 数 的 (1/4) 多 33 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5294", "content": "甲 数 + 乙 数 = 28 ， 甲 数 ： 乙 数 = 4 ： 3 ， 甲 数 比 乙 数多 多少 （ 填 分数 ） ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19358", "content": "妈妈 存入 银行 60000 元 ， 定期 一年 ， 年利率 是 5.22% ， 一年 后 妈妈 从 银行 共 取回 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21516", "content": "师徒 两 人 共同 加工 一批 零件 ， 原 计划 师徒 两 人 所 做 零件 个数 的 比 为 5 ： 4 ， 结果 完成 任务 时 ， 师傅 做 了 总数 的 (2/3) ， 比 原 计划 多 做 了 18 个 零件 ， 徒弟 原 计划 做 多少 个 零件 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "2037", "content": "一 件 上衣 128 元 ， 比 一条 裤子 价钱 的 3 倍 少 22 元 ， 这 条 裤子 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15700", "content": "一 只 蚱蜢 一次 能 跳跃 72 厘米 ， 是 它 身长 的 9 倍 ， 这 只 蚱蜢 身长 多少 厘米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7377", "content": "甲 、 乙 两缸 共有 金鱼 若干 尾 ， 其中 甲 缸 占 60% ， 从 乙 缸 取出 12 尾 放入 甲 缸 ， 这时 乙 缸 金鱼 占 总数 的 25% ． 甲 缸 原来 有 金鱼 多少 尾 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17933", "content": "某 化肥厂 要 生产 一批 化肥 ， 计划 每天 生产 化肥 25.6 吨 ， 需要 18 天 完成 ． 实际 提前 3 天 就 完成 了 任务 ， 实际 平均 每天 生产 化肥 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17269", "content": "体育老师 带 800 元 钱 去 体育 用品商店 ， 买 了 24 个 足球 后 还 剩 8 元 ， 平均 每个 足球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15372", "content": "食堂 原有 34 袋 大米 ， 又 运 来 6 袋 ． 食堂 每周 吃 4 袋 大米 ． 这些 大米 够吃 几周 的 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9132", "content": "一 个数 的 (3/5) 是 30 的 (7/8) ， 这个 数 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2362", "content": "2010 * 20112011 - 2011 * 20102010 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21354", "content": "吉祥 蛋糕 房 加工 一种 蛋糕 ， 每个 蛋糕 需要 用 5.6 克 白色 奶油 和 2.5 克 彩色 奶油 ． 国庆节 那天 加工 这种 蛋糕 共用 了 彩色 奶油 100 克 ， 你 能 算 出 一 共用 了 多少 白色 奶油 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3108", "content": "3 米 的 (1/5) 和 多少 米 的 (3/5) 一样 长 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11215", "content": "算式   (46/75) / （ (5/12) + (11/15) ） - (7/30) 的 值 为 多少 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7014", "content": "甲 、 乙 两地 相距 285 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 行 了 3 小时 后 还 剩 60 千米 ， 这辆 汽车 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7961", "content": "两个 数 的 和 是 940 ， 其中 一个 加数 是 362 ， 另 一个 加数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15094", "content": "园林 工人 对 一块 750 平方米 的 草坪 进行 剪 修 ， 平均 每 小时 剪 修 84 平方米 ， 已经 剪 修 了 4.5 小时 ， 剩下 的 要 在 5 小时 内 剪 修 完 ， 平均 每 小时 要 剪 修 多少 平方米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14417", "content": "某 商场 的 电冰箱 现在 只 卖 3600 元 ， 比 刚 上市 时 降低 了 40% ， 刚 上市 时 ， 每 台 冰箱 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2253", "content": "飞机 顺风 航行 需 5 小时 ， 飞机 无 风 飞行 的 速度 为 每 小时 36 千米 ， 风速 为 每 小时 2 千米 ， 问 逆风 行驶 需 几小时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4038", "content": "陈 师傅 用 铁皮 做 8 节 同样 大小 的 圆柱形 通风管 ， 直径 是 20 厘米 ， 每节 长 40 厘米 ． 一 共用 铁皮 多少 平方厘米 ？ （ 接头处 不计 ）", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2820", "content": "六年级 学生 今天 的 出勤率 是 94% ， 有 3 人 缺勤 ， 这个 班 一个 有 多少 名 学生 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2897", "content": "植树节 同学 们 要 植 150 棵 树 ， 第一天 植 了 (1/3) ， 其中 的 (2/5) 是 六年级 植 的 ． 六年级 第一天 植 了 多少 棵 树 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20618", "content": "给 一个 直径 8 米 的 圆形 喷水池 围 上 栏杆 ， 栏杆 每隔 1.57 米 做 1 个 立柱 ． 这个 喷水池 需要 几个 立柱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14699", "content": "甲 、 乙 两个 人 同时 从 a 、 b 两地 相向 而 行 ， 甲 每分钟 走 100 米 ， 甲 的 速度 是 乙 的 速度 的 (5/4) ， 5 分钟 后 ， 两 人 正好 行 了 全程 的 (3/5) ， a 、 b 两地 相距 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17762", "content": "240 - 125 / 25 * 3 的 计算 顺序 是 先 算 多少 法 ， 再 算 多少 法 ， 最后 算 多少 法 ， 结果 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "595", "content": "加工 一批 零件 ， 每天 完成 全部 加工 任务 的 (5/36) ， 3 天 后 还有 105 个 没 完成 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23063", "content": "袋子 里 由 同样 大小 的 红色 和 白色 的 乒乓球 各 10 个 ， 要 想 摸 出 的 球 一定 有 2 个 同 色 的 ， 至少 要 摸 出 多少 个 球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14711", "content": "四年级 一班 有 6 个 小组 ， 每组 7 个 同学 ． 平均 每人 采集 5 只 昆虫 制作 标本 ． 全班同学 一共 采集 了 多少 只 昆虫 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "10775", "content": "一 辆 汽车 一次 可 运 化肥 30 吨 ， 要 运 7200 吨 化肥 ， 用 12 辆 这样 的 汽车 来 运 ， 多少 次 才能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19382", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 的 速度 是 每 小时 60 千米 ， 共用 3 小时 ， 返回 时 只用 2 小时 ， 这辆 汽车 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4477", "content": "同学 们 买 16 只 黄 气球 、 20 只 红 气球 ， 买 红 气球 比 黄 气球 多 花 2.4 元 ， 每 只 气球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2738", "content": "小 明 做 数学 家庭作业 用 了 (1/3) 小时 ， 做 语文 作业 比做 数学 作业 多用 了 (1/6) 小时 ， 他 完成 作业 一 共用 了 多少 小时 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6814", "content": "餐厅 购进 40 套餐 桌椅 ． 每张 桌子 225 元 ， 每张 椅子 75 元 ， 购置 这 批 桌椅 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7319", "content": "张师傅 上午 生产 了 47 个 零件 ， 下午 生产 了 49 个 零件 ． 每 8 个 零件 装 一盒 ， 一共 要 装 多少 盒 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14128", "content": "一 列 客车 与 一列 货车 同时 从 a ， b 两站 出发 ， 相向 而 行 ， 已知 客车 每 时 行 80 千米 ， 货车 每 时 行 60 千米 ， 2.5 时 后 ， 两车 还 相距 50 千米 ． 求 两站 之间 的 铁路 长 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4334", "content": "爸爸 今年 40 岁 ， 儿子 的 年龄 比 爸爸 年龄 的 (1/4) 多 4 岁 ， 儿子 今年 多少岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6924", "content": "一 列 货车 有 30 节车厢 ， 每 节车厢 可 装 煤 104 吨 ， 用 这 列 火车 运 3000 吨 煤 ． 能 不能 一次 全部 运走 ？ 为什么 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5486", "content": "爷爷 今年 65 岁 ， 爸爸 的 年龄 是 爷爷 的 (3/5) ， 爸爸 今年 多少岁 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2483", "content": "师徒 两 人 同时 加工 一批 零件 ， 师傅 每 小时 加工 12 个 ， 徒弟 每 小时 加工 8 个 ， 完成 任务 时 师傅 比 徒弟 多 加工 6 个 ， 他们 加工 这个 零件 共用 了 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17923", "content": "长虹 饭店 第一季度 营业额 为 12 万元 ， 第 二 季度 的 营业额 为 15 万元 ， 增长 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19294", "content": "小胖 乘火车 从 上海 出发 ， 开往 相距 600 千米 的 小镇 ， 3 小时 行 150 千米 ， 还要 多少 小时 才能 到达 终点 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17900", "content": "350 连续 减去 70 ， 减 多少 次 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8910", "content": "黄瓜 每千克 的 售价 为 3.20 元 ， 妈妈 买 了 1.5 千克 黄瓜 ， 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22583", "content": "6 一班 共有 学生 60 人 ， 每人 至少 参加 一 个 兴趣小组 ， 其中 (2/3) 的 人 参加 体育 兴趣小组 ， (3/5) 的 人 参加 数学 兴趣小组 ． 两个 小组 都 参加 的 至少 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22096", "content": "甲 仓库 存粮 10.8 吨 ， 乙 仓库 存粮 14 吨 ， 要 使 甲 仓库 的 存粮 是 乙 仓库 的 3 倍 ， 那么 必须 从 乙 仓库 运出 多少 吨 放入 甲 仓库 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9705", "content": "一 条 通道 长 45 米 ， 从 起点 到 终点 ， 每 1.5 米 立 一根 彩 杆 ， 一共 要 立 多少 根 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15571", "content": "0.4 与 (1/3) 的 和 除以 它们 的 差 ， 商 = ？ （ 列 综合 算式 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12316", "content": "李 明 走 了 5 步 ， 一共 走 了 440 厘米 ， 小 李 平均 每步 走 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19870", "content": "甲 数 是 320 ， 比 乙 数多 76 ， 乙 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15420", "content": "一 本书 ， 看 了 几天 后 还 剩 160 页 没 看 ， 剩下 的 页数 比 这 本书 的 (2/3) 少 20 页 ， 这 本书 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16351", "content": "5 年 定期存款 的 年利率 是 4.52% ． 李 燕 把 4000 元 存入 银行 ， 5 年 后 共 取回 多少 元 ？ （ 税率 为 5% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15878", "content": "一 块 地 是 (4/5) 公顷 ， 这块 地 的 (1/7) = 多少 公顷 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16173", "content": "有 30 分 米 长 的 木棍 ， 现 要 在 木棍 上 划线 ． 先 每隔 2 分 米 划 一条线 ， 再 每隔 3 分 米 划 一条线 ， 最后 按 划线 处 锯开 木棍 ， 共 能 锯 成 多少 段 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "13664", "content": "甲乙 两地 相距 1200 千米 ， 一列 火车 3 小时 行驶 了 240 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 火车 需要 行驶 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22686", "content": "做 一批 零件 4 小时 可以 完成 ， 那么 多少 小时 可以 完成 这 批 零件 的 (3/8) ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7795", "content": "寒假 期间 ， 小 明 计划 读书 60 万 字 ， 小 刚 说 ： “ 小 明 计划 读 的 比 我 的 2 倍 少 20 万 字 ． ” 请 你 算 一 算 ， 小 刚 准备 读 多少 万 字 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13351", "content": "学校 图书室 有 5 个 书架 ， 每个 书架 有 830 本书 ， 学校 图书室 一共 有 多少 本 图书 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3448", "content": "一 种 服装 降价 (1/5) 后 ， 售价 是 96 元 ， 那么 这种 服装 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7360", "content": "一 捆 绳子 长 125 米 ， 第一次 用 去 全长 的 40% ， 第 二 次 用 去 47 米 ． 用 了 两次 后 ， 这根 绳子 短 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12594", "content": "一 桶 水 ， 用 去 它 的 (3/4) ， 用 去 了 15 千克 ． 这 桶 水 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19811", "content": "在 一个 不 透明 的 口袋 中 摸 出 红球 的 可能性 为 (1/5) ， 已知 口袋 中 的 红球 是 3 个 ， 则 袋中 一共 有 多少 个 球 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13856", "content": "有 含盐 6% 的 盐水 80 千克 ， 要 配制 含盐 20% 的 盐水 150 千克 ， 需 加盐 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21087", "content": "王 叔叔 买 了 一辆 小轿车 ， 按 车价 的 9% 缴纳 车辆 购置税 1.8 万元 ． 这辆 小轿车 纳税 后 的 总价 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20947", "content": "小 明 从 a 地 出发 ， 以 每分钟 70 米 的 速度 向 b 地 走 去 ， 行 了 全程 的 20% 以后 ， 小 华以 每分钟 80 米 的 速度 从 b 地 出发 ， 与 小 明 相向 而 行 ， 12 分钟 后 相遇 ． a 、 b 两地 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11751", "content": "李 宏 同学 读 一 本书 ， 前 6 天 平均 每天 读 25 页 ， 后 4 天 共 读 了 60 页 ． 他 平均 每天 读 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17216", "content": "龟 和 兔 进行 1500 米 的 赛跑 ， 龟 每分钟 爬 25 米 ， 兔 每分钟 跑 325 米 ， 兔 自 以为 能 得 第一 ， 途中 睡 了 一 觉 ． 结果 龟 到 终点 时 ， 兔 还有 200 米 ， 兔 睡 了 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19305", "content": "把 一根 木材 锯 成 4 段 要 用 12 分钟 ， 照 这样 计算 ， 锯 成 5 段 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8647", "content": "甲 有 36 本 课外书 ， 乙 有 24 本 课外书 ， 两 人 捐出 同样 多 本书 后 ， 甲 剩下 的 书本 数 是 乙 剩下 书本 数 的 3 倍 ， 两 人 各 捐 多少 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21634", "content": "妈妈 拿 200 元 买 衣服 ， 买 上衣 用 了 154 元 ， 余下 的 钱 刚好 买 了 一条 裤子 ， 上衣 比 裤子 贵 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4692", "content": "一 件 上衣 和 一条 裤子 共 400 元 ， 其中 每 条 裤子 的 价格 是 每件 上衣 的 (3/5) ， 求 每件 上衣 的 价格 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21346", "content": "某 小学 四年级 学生 有 136 人 ， 占 全校学生 总数 的 (4/25) ， 五年级 学生 是 全校学生 数 的 18% ， 五年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21179", "content": "修 一条 公路 ， 已修 的 是 未 修 的 (3/4) ． 没有 修 的 还有 120 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17735", "content": "一 个数 先 乘以 4 再 减去 28 ， 再 除以 6 后 是 24 ， 这个 数 原来 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8650", "content": "学校 美术 作品展 中 ， 有 50 幅 水彩画 ， 60 幅 蜡笔画 ， 蜡笔画 比 水彩画 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2211", "content": "要 修建 一个 长 18 米 ， 宽 10 米 ， 深 2 米 的 游泳池 ， 如果 要 在 游泳池 的 4 壁 和 底面 抹 上 一层 水泥 ， 抹 水泥 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.6, "length": 15}
-{"question_id": "18192", "content": "聪聪 在 计算 一道 除法 题 时 ， 把 除数 2.8 错 写成 了 28 ， 结果 得 25 ． 那么 正确 结果 应 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10585", "content": "学校 计划 植树 450 课 ， 已经 植 了 300 棵 ， 已经 植 了 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11960", "content": "50 千克 的 (2/5) = 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17482", "content": "某种 花生 出油率 为 25% ， 要 想 榨出 100 千克 花生油 ． 需要 多少 千克 花生 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "654", "content": "南京 到 常州 的 铁路 长 是 138 千米 ． 一列 快车 和 一列 慢车 同时 从 南京 和 常州 相对 开出 ． 已知 快车 每 小时 行 88 千米 ， 经过 1 小时 两车 相遇 ． 相遇 后 慢车 还要 行 几小时 才能 到达 南京 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20938", "content": "某 车间 男工 人数 是 女工 人数 的 (4/5) ， 男工 是 全厂 人数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19889", "content": "一 个 纺织厂 平均 每 小时 生产 棉纱 928 千克 ， 如果 每千克 棉纱 织布 7.2 米 ， 这个 厂 每 小时 生产 棉纱 可以 织 多少 米 布 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3134", "content": "甲乙 两 人 拿出 同样 多 的 钱 合 买 一段 花布 ， 原 约定 各 拿 花布 一样 多 ． 结果 甲 拿 了 6 尺 ， 乙 拿 了 14 尺 ， 这样 ， 乙 就 给 甲 2 元 钱 ． 每 尺 花布 单价 多少 元 ？ （ 只 写 答案 ， 不 列式 ）", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15052", "content": "一 台 拖拉机 上午 耕地 3.85 公顷 ， 下午 比 上午 少 耕 0.5 公顷 ． 这 台 拖拉机 全天 一共 耕地 多少 公顷 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2107", "content": "小 明 有 45 张 邮票 ， 是 小 芳 邮票 张 数 的 (3/4) ， 小 丽 的 邮票 张 数 是 小 芳 的 (3/5) ， 小 丽 有 多少 张 邮票 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12060", "content": "小 明 在 做 减法 时 ， 错 把 减数 117 写成 了 171 ， 结果 为 80 ， 正确 的 结果 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3168", "content": "某 产品 的 合格率 为 98% ， 那么 12350 件产品 中 有 多少 件 是 废品 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12123", "content": "上海 到 北京 大约 有 1200 千米 的 路程 ， 乘 高铁 从 上海 去 北京 只要 4.8 小时 ， 从 上海 到 北京 的 快速 火车 的 平均速度 只有 100 千米 / 时 ， 求 高铁 的 速度 是 快速 火车 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9375", "content": "学校 有 780 本 图书 ， 五年级 借 去 了 (1/5) ， 六年级 借 去 了 (5/12) ， 还 剩下 多少 本 图书 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4071", "content": "一 个数 的 25% 是 150 ， 这个 数 的 40% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10959", "content": "一 个 果园 占地 20 公顷 ， 其中 的 (1/2) 种 苹果树 ， (1/4) 种 梨树 ， 剩下 的 地 种 橘子 ， 种 橘子 多少 公顷 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21384", "content": "多少 / 5 = 8 … 4 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6685", "content": "一 个 底 是 6 cm ， 高 是 4 cm 的 平行四边形 ， 面积 = 多少 cm ^ 2 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14283", "content": "张 大爷 养 了 200 只 鹅 ， 鹅 的 只 数 比 鸭 少 (3/5) ． 养 了 多少 只 鸭 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18230", "content": "3 个 小朋友 一起 跳远 ， 小强 跳 了 3.26 米 ， 比 小 星 少 跳 0.16 米 ， 小 宇 比 小 星 多 跳 了 0.24 米 ． 小 宇 跳 了 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20873", "content": "养鸡场 共养 母鸡 485 只 ， 比 公鸡 的 只 数多 156 只 ， 小鸡 的 只 数 是 公鸡 的 4 倍 ， 养鸡场 共养 小鸡 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8891", "content": "甲 比 乙 少 10% ， 表示 甲 数 是 乙 数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1077", "content": "商店 新近 了 一批 水果 ， 每 筐 装 12 千克 ， 需要 68 个 筐 ． 如果 每 筐 装 16 千克 ， 要 多少 个 筐 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18349", "content": "平行四边形 相邻 两边 分别 长 5 厘米 、 7 厘米 、 它 的 高 是 6 厘米 ， 它 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11949", "content": "一 间 教室 宽 6 米 ， 长 比 宽 多 (1/3) ， 这 间 教室 的 面积 = 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "5212", "content": "一 本 故事书 ， 王 静 如果 每天 看 25 页 ， 6 天 可以 看 完 ． 她 如果 每天 看 30 页 ， 几天 能 看 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5867", "content": "师徒 两 人 共同 加工 一批 零件 ， 徒弟 加工 了 28 个 ， 师傅 加工 的 个数 是 徒弟 的 3 倍 ． 师徒 两 人 一共 加工 了 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20266", "content": "一 天 ， 小 明 和 小 刚 两 人 分别 去 对方 家里 ， 他们 同时 从 自家 出发 ， 小 明 每分钟 走 70 米 ， 小 刚 每分钟 走 80 米 ． 10 分钟 后 ， 他们 两 人 之间 的 距离 是 两家 之间 的 距离 的 20% ， 那么 小 明 家 和 小 刚 家 可能 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11785", "content": "五年级 （ 1 ） 班 有 男生 17 人 和 女生 15 人 ， 在 电脑 比赛 中 ， 男生 平均 成绩 为 80 分 ， 女生 平均 成绩 为 88 分 ． 全班学生 平均 成绩 为 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20480", "content": "一 条 高速路 长 336 千米 ． 一辆 客车 3.2 小时 行 完全 程 ， 一辆 货车 3.5 小时 行 完全 程 ． 客车 的 速度 比 货车 的 速度 快 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15428", "content": "同学 们 站 成 一队 做操 ， 从 第一个 到 最后 一个 学生 是 36 米 ， 每 两个 学生 都 间隔 2 米 ， 一共 有 多少 名 学生 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21154", "content": "尼罗河 全长 6670 km ， 长江 比 尼罗河 的 (9/10) 还 长 297 km ． 长江 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7891", "content": "(2/3) = 6 / 9 = 多少 ： 81 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "715", "content": "某 工程队 修 一段 公路 ， 第一期 修 了 全长 的 (1/2) ， 第 二 期 修 了 800 米 ， 还 剩下 全长 的 30% 没有 修 ． 这 段 公路 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4098", "content": "一 个数 的 (9/10) 是 36 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5253", "content": "计算 ： 1999.9 + 199.9 + 19.9 + 1.9 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19162", "content": "佳 友 伞 厂 为 青海 玉树 灾区 赶制 一批 帐篷 ． 第一天 生产 了 这 批 帐篷 的 (1/5) ， 第 二 天 生产 了 总数 的 (7/20) ， 两天 共 生产 帐篷 4400 顶 ． 第一天 生产 帐篷 多少 顶 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10006", "content": "王老师 家 上个月 的 支出 中 ， 房租 约 占 全 月 总支出 的 (1/6) ， 水果 方面 的 支出 占 总支出 的 (1/4) ， 这两项 支出 占 总支出 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8829", "content": "蔬菜 店 运 来 白菜 500 千克 ， 运 来 茄子 是 白菜 的 (2/25) ， 又 是 西红柿 的 (1/6) ， 运 来 西红柿 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10481", "content": "某 工厂 工人 中 ， 青年工人 占 (3/4) ， 其余 是 老工人 ． 老工人 占 青年工人 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21691", "content": "电视机厂 5 月份 计划 生产 电视机 2400 台 上旬 完成 全 月 计划 的 (2/5) ， 中旬 完成 计划 全 月 计划 的 50% ， 上旬 和 中旬 一共 生产 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8297", "content": "一 台 录音机 售价 425 元 ， 一台 电视机 的 售价 是 一台 录音机 的 4 倍 ． 买 一台 录音机 和 一台 电视机 一共 需 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14325", "content": "快慢 两列 火车 的 长 分别 是 200 米 、 300 米 ， 它们 相向 而 行 ． 坐在 慢 车上 的 人 见 快车 通过 此人 窗口 的 时间 是 8 秒 ， 则 坐在 快车 上 的 人 见 慢车 通过 此人 窗口 所用 的 时间 = 多少 秒 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10522", "content": "胜利 电影院 原有 座位 32 排 ， 平均 每排 坐 38 人 ， 扩建 后 增加 到 40 排 ， 可比 原来 多 坐 624 人 ， 扩建 后 平均 每排 可 坐 多少 人 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13308", "content": "学校 组织 学生 参观 屈原祠 ， 上午 去 参观 的 有 670 人 ， 下午 分 3 批 去 参观 ， 每批 136 人 ． 这 一天 去 参观 的 学生 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3811", "content": "王老师 买 排球 用 了 40 元 ， 买 篮球 用 的 钱 数 是 排球 的 3 倍 ． 王老师 买 球 一 共用 了 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4464", "content": "实验 小学 要 把 一种 棱 长 5 dm 的 正方体 纸箱 的 每 一个 面 都 贴 上 红纸 ， 用来 做 “ 爱心 捐款箱 ” ． 要 做 这样 的 6 个 纸箱 ， 至少 需要 多少 平方分米 的 红纸 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "17222", "content": "书店 一套 《 童话故事 》 标价 如下 ： 每套 16 本 ， 每 本 15.5 元 ． 小 明 用 会员卡 买 了 一套 ， 只用 了 198.4 元 ． 他 使用 会员卡 节省 了 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8955", "content": "一 辆 压路机 ， 每分钟 行驶 30 米 ， 压路 宽度 是 3 米 ， 压路机 行驶 5 分钟 ， 能 压 多 大 的 地面 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19691", "content": "甲乙 两位 同学 在 学校 环形 跑道 上 跑步 ， 两 人 在 同一 地点 往 相反 方向 跑 ， 甲 每分钟 跑 52 米 ， 乙 每分钟 跑 48 米 ， 4 分钟 后 两 人 相遇 ， 学校 环形 跑道 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14710", "content": "一 本书 100 页 ， 小 明 看 了 20 页 ， 没 看 的 页数 是 看过 页数 的 多少倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1652", "content": "把 一根 绳子 平均 分成 5 段 ， 每 段长 6 米 ， 还 剩 2 米 ． 这根 绳子 原来 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20037", "content": "李老师 把 一张 纸 的 (3/4) 送给 小 红 做 手工 ， 小 红 只用 了 其中 的 (5/6) ， 小 红 用 去 这 张 纸 的 几分 之 几 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9316", "content": "小 明 看 一 本书 ， 看过 的 页数 比 全书 的 (1/4) 多 13 页 ， 没 看 的 页数 比 全书 的 (2/3) 少 3 页 ， 全书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4688", "content": "200572 * 200711 - 200571 * 200712 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20000", "content": "小 华 借来 一本 《 海底 探秘 》 ， 这 本书 共 150 页 ． 小 华 已经 看 了 60 页 ， 剩下 的 打算 用 5 天 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14165", "content": "一 桶 油 ， 第一天 用 去 它 的 30% ， 第 二 天 用 去 10 千克 ， 两天 共用 去 这 桶 油 的 (2/5) ， 则 用 去 两天 后 还 剩 多少 千克 油 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8237", "content": "水果店 运 来 一批 水果 ， 第一天 卖出 这 批 水果 的 (1/9) ， 还 剩 多少 没 卖 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11100", "content": "某 电脑公司 请 小 红 的 爸爸 设计 了 一套 软件 ， 公司 付给 他 报酬 3600 元 ， 按规定 超过 800 元 的 部分 应 按 20% 的 税率 缴纳 个人所得税 ， 小 红 的 爸爸 税后 所得 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17376", "content": "展览厅 内 有 8 根 同样 的 圆柱形 柱子 ， 每 根 高 5 米 ， 底面 周长 是 3.2 米 ， 要 在 柱子 外 面包 一层 广告 纸 ， 至少 需 多少 平方米 的 广告 纸 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2032", "content": "上海 广播 电视塔 高 468 米 ， 中央 广播 电视塔 高 405 米 ， 上海 广播 电视塔 比 中央 广播 电视塔 高 多少 米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22806", "content": "100 克 清水 中 放入 15 克 糖 ， 那么 糖 是 糖水 的 几分 之 几 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4128", "content": "有 梨 和 苹果 若干个 ， 梨 的 个数 是 全体 的 (3/5) 少 17 个 ， 苹果 的 个数 是 全体 的 (4/7) 少 31 个 ， 那么 梨 和 苹果 的 个数 共 多少 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22751", "content": "小 明 有 一本 180 面 的 书 ， 已经 看 了 60 页 ． 如果 剩下 的 部分 要 在 4 天 内 看 完 ， 平均 每天 要 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14798", "content": "一 套 服装 原价 105 元 ， 是 现价 的 1.4 倍 ， 这 套 服装 现价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21696", "content": "美 华 服装厂 计划 生产 3800 件 运 服 ， 已经 工作 12 天 ， 平均 每天 做 210 件 ， 剩下 的 如果 每天 做 160 ， 还 算 需要 几天 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20233", "content": "养鸡场 有 公鸡 168 只 ， 公鸡 比 母鸡 少 382 只 ． 一共 有 多少 只 鸡 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22163", "content": "除以 是 23 ， 商 与 余数 都 是 12 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2704", "content": "一 把 椅子 45 元 ， 一张 桌子 的 价钱 比 椅子 的 3 倍 少 18 元 ， 一张 桌子 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15217", "content": "一 个数 的 2 倍 / 0.6 的 商 是 4.5 ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20682", "content": "两个 不是 0 的 因数 ， 第一个 因数 缩小 到 它 的 (1/10) ， 第 二 个 因数 扩大 到 它 的 100 倍 ， 他们 的 积 就 扩大 多少倍 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1714", "content": "小林 看 一本 80 页 的 故事书 ， 第一天 看 了 它 的 (1/4) ， 第 二 天 应从 第 多少 页 开始 看 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7445", "content": "商店 进 了 一批 水果 ， 第一天 卖出 30% ， 第 二 天 卖出 120 千克 ， 比 第一天 多 卖出 20% ． 这 批 水果 有 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7744", "content": "和平 公园 运 来 80 箱 牡丹花 ， 每箱 14 盆 ， 在 装点 时 已经 用 去 670 盆 ， 还 剩 多少 盆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20720", "content": "李老师 带 320 元 钱 去 买 球 ， 买 了 4 个 篮球 以后 剩下 的 钱 正好 买 2 个 足球 ． 一个 篮球 60 元 ， 一个 足球 的 价钱 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10290", "content": "一 间 房子 用 方砖 铺 地 ， 用 边长 是 3 dm 的 方砖 ， 需要 48 块 ． 如果 改用 边长 是 4 dm 的 方砖 ， 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14990", "content": "小 松鼠 储藏 了 一些 松果 过冬 ． 小 松鼠 原 计划 每天 吃 6 个 松果 ， 实际 每天 比 原 计划 多 吃 2 个 ， 结果 提前 5 天 吃 完 了 松果 ． 小 松鼠 一共 储藏 了 多少 个 松果 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18927", "content": "学校 有 一个 长方形 花池 长 12 米 ， 宽 9 米 ， 如果 每平方米 栽 21 株 花 ， 这个 花池 一共 能 栽 多少 株 花 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11906", "content": "杨 树种 了 20 棵 ， 柳树 比 杨树 多 60% ． 柳树 种 了 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8133", "content": "一 本书 100 页 ， 已经 看 了 28 页 ， 还 剩下 百分之几 没有 看 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13216", "content": "将 一个 蛋糕 看成 整体 1 ， 小 明 和 妈妈 吃 了 这块 蛋糕 的 (1/3) ． 现 小 明 想 把 余下 的 蛋糕 平均 分成 5 份 ， 取 其中 的 4 份 带到 学校 分给 他 的 4 个 好 朋友 吃 ， 剩下 的 留给 他 爸爸 吃 ， 小 明 带到 学校 去 的 蛋糕 是 整个 蛋糕 的 多少 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5461", "content": "一 块 石头 重 50 千克 ， 多少 块 这样 的 石头 重 1000 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5513", "content": "一 个 三角形 的 底 是 12 分 米 ， 高 是 0.6 分 米 ， 与 它 等 底 等 高 的 平行四边形 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16295", "content": "一 根 铜丝 长 18.84 米 ， 正好 在 一个 圆形 线轴 上 绕 40 周 ． 这个 圆形 线轴 的 直径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12278", "content": "小 明 体重 是 36 千克 ， 比 小 玲 轻 (1/7) ． 小 玲 的 体重 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1092", "content": "把 一根 木头 锯 成 4 段 需要 12 分钟 ， 如果 把 它 锯 成 8 段 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "23101", "content": "有 一个 数 ， 把 它 乘 4 以后 减去 46 ， 再 把 所得 的 差 除以 3 ， 然后 减去 10 ， 最后 得 40 ， 问 ： 这个 数 是 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19180", "content": "李 峰 想 买 一套 音响 ， 如果 在 30 天 内 付款 ， 可 优惠 15% ， 如果 在 10 天 内 付款 ， 可 优惠 20% ， 他 听 后 立即 付 了 4000 元 ， 那么 原价 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11592", "content": "某班 55% 的 学生 是 女生 ， 女生 比 男生 多 4 人 ， 全班 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19102", "content": "2.5 / 0.12 的 商 是 20 时 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21585", "content": "一 根 绳子 截去 (5/6) 米 后 ， 剩下 的 比 截去 的 多 (7/12) 米 ． 这根 绳子 原 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3086", "content": "某班 学生 有 (3/5) 是 男生 ， 男生 中 (1/10) 的 人 想 当 老师 ， 全班学生 中 想 当 老师 的 人 中 (3/8) 是 男生 ， 女生 中 想 当 老师 的 人数 占 女生 的 几分 之 几 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "13765", "content": "(5/8) 平方米 的 (4/11) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8751", "content": "840 / 6 / 70 + 630 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22497", "content": "两个 乘数 相 乘积 是 250 ， 一个 乘数 不变 ， 另 一个 乘数 扩大 100 倍 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15011", "content": "光明 小学 共有 教师 120 人 ， 男 教师 人数 是 女 教师 的 (1/2) ， 男 教师 有 多少 人 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15868", "content": "食品店 运 来 500 千克 桔子 ， 运 来 的 桔子 比 香蕉 多 3 箱 ． 已知 每箱 桔子 重 20 千克 ， 每箱 香蕉 重 21.5 千克 ， 运 来 香蕉 共 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1246", "content": "比 (1/4) 吨 多 (1/2) 吨 = 多少 吨 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22404", "content": "小 聪 和 小 华 从 学校 去 少年宫 ， 小 聪 每分钟 走 72 米 ， 小 聪 出发 2 分钟 后 小 华 出发 ， 小 华 比 小 聪 早 4 分钟 到 少年宫 ， 小 华 每分钟 走 90 米 ， 学校 到 少年宫 有 多少 米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9595", "content": "有 科技 书 的 有 28 人 ， 有 故事书 的 有 26 人 ， 两种 都 有 的 有 10 人 ， 两种 都 没有 的 有 2 人 ， 这个 班 共有 学生 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17642", "content": "青蛙 爸爸 每天 消灭 54 只 害虫 ， 青蛙 儿子 每天 消灭 46 只 害虫 ， 青蛙 爸爸 和 青蛙 儿子 一个月 （ 31 天 ） 一共 消灭 多少 只 害虫 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16256", "content": "天线宝宝 有 一些 跳 跳球 ， 每 4 个 装 一盒 可以 装 72 盒 ， 如果 将 这些 跳 跳球 每 8 个 装 一盒 ， 可以 装 多少 盒 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1632", "content": "在 减少 白色污染 环保 大 行动 中 ， 四年级 （ 1 ） 班 40 名 同学 共 捡 白色 塑料袋 200 个 ． 平均 每 名 学生 捡 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16894", "content": "一 根 电线 长 20 米 ， 第一次 用 去 全长 的 (1/5) ， 第 二 次 用 去 (2/5) 米 ， 两次 一 共用 去 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20075", "content": "一 架飞机 3 小时 飞行 2400 千米 ， 一辆 汽车 4 小时 行驶 160 千米 ． 飞机 的 速度 是 汽车 速度 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2233", "content": "一 辆 汽车 从 甲地 去往 乙地 ， 去 时 每 小时 行驶 45 千米 ， 用 了 6 小时 ， 返回 时 比 去 时 多用 1 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18669", "content": "在 一个 圆 内 ， 以 它 的 半径 为 边长 做 一个 正方形 ， 已知 正方形 面积 是 16 平方厘米 ， 圆 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21832", "content": "某 厂 原有 职工 300 人 ， 其中 男工 占 全厂 总 人数 的 40% ， 今年 又 招进 一批 男工 ， 这时 男工 占 全厂 总 人数 的 (1/2) ． 今年 招进 男工 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "5395", "content": "小 明 今天 看书 90 页 ， 昨天 看书 的 页数 比 今天 多 (1/9) ． 问 ： 小 明 昨天 看书 多页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5573", "content": "食堂 运来了 850 千克 大米 ， 吃 了 16 天 ， 平均 每天 吃 28 千克 ， 还 剩 多少 千克 大米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4492", "content": "一 把 椅子 的 价钱 是 25 元 ， 一张 桌子 的 价钱 是 一把 椅子 的 3 倍 ． 买 一把 椅子 和 一张 桌子 共用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5637", "content": "某 修路 队 修 一条 路 ， 第一天 修 了 全长 的 (1/4) ， 第 二 天 修 了 全长 的 (1/3) ， 还 剩 100 米 没有 修 ， 这 条 路 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13475", "content": "0.6 的 8 倍 - 2.7 / 0.81 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14616", "content": "张 敏 看 一 本书 ， 每天 看 18 页 ， 12 天 正好 看 了 这 本书 的 一半 ． 剩下 的 要 9 天 看 完 ， 每天 要 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2730", "content": "比 (1/7) 多 (2/7) 的 数 = ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5549", "content": "小 明 家住 在 6 楼 ， 小 华 家住 在 4 楼 ， 每 层楼 之间 的 楼梯 的 级数 都 相同 ． 小 华 回家 共 要 走 48 级 楼梯 ， 问 小 明 回家 要 走 多少级 楼梯 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10359", "content": "小 红 买 一个 文具盒 ， 付给 营业员 20 元 ， 找回 13.8 元 ， 这个 文具盒 多少 元 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4193", "content": "水果市场 上午 批发 苹果 (3/4) 吨 ， 比 下午 多 (1/12) 吨 ， 全天 共 批发 苹果 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10159", "content": "某班 有 学生 42 人 ， 女生 占 (4/7) ， 女生 有 多少 人 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7739", "content": "小猴子 摘 桃子 28 个 ， 大 猴子 摘 的 比 小猴子 的 3 倍 多 11 个 ， 大 猴子 摘 了 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22261", "content": "为 筹集 捐款 ， 同学 们 参加 义务 卖报 活动 ． 卖出 晚报 120 份 ， 晨报 比 晚报 多 卖 20% ． 晨报 卖出 多少 份 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9268", "content": "小兵 拿 7.2 元 买 文具 ， 买 了 3 枝 铅笔 ， 每枝 0.8 元 ， 剩下 的 钱 买 笔记本 ， 每 本 0.6 元 ， 能 买 几本 笔记本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23074", "content": "商店 运 来 一批 水果 ， 运 来 苹果 36 筐 ， 梨 的 筐 数 是 苹果 的 (3/4) ， 同时 又 是 橘子 的 (3/5) ． 商店 运 来 橘子 多少 筐 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1281", "content": "“ 6 一 ” 期间 ， 中央 商场 搞 “ 家电 下乡 ” 活动 ， 农民 购买 家电 时 可 享受 政府 补贴 13% 的 优惠政策 ． 张 大伯 家 买 了 一台 电冰箱 ， 只 需 付 1392 元 ， 这 台 冰箱 的 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17053", "content": "有 平行四边形 钢板 一块 ， 底 是 2.5 米 ， 高 是 1.6 米 ， 如果 每平方米 钢板 重 24 千克 ， 这块 钢板 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "160", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 上午 用 3.5 小时 行 了 217 千米 ． 照 这样 的 速度 ， 它 还要 再行 4.5 小时 才能 到达 乙 城 ， 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5232", "content": "28 乘 一个 数 ， 积 为 504 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19747", "content": "把 3 千克 的 糖果 ， 平均 装 在 8 个 盒子 里 ， 每个 盒子 的 糖果 占 这些 糖果 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20615", "content": "小张 是 1989 年 6 月 25 日 出生 的 ， 到 2006 年 生日 时 ， 他 满 多少 周岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11675", "content": "甲 、 乙 两车 同时 从 a 、 b 两地 相向 而 行 ． 甲 车 每 小时 行 60 千米 ， 乙 车 每 小时 走 全程 的 10% ， 当 乙 车 走 到 全程 的 (24/13) 时 ， 甲 车 走 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10917", "content": "某 彩电 原来 的 售价 为 1900 元 ， 现在 降价 200 元 ， 现在 的 售价 是 原来 价 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14995", "content": "张 丽 看 一 本书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 余下 的 (1/4) 又 多 15 页 ， 这时 还 剩 60 页 没有 看 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "10588", "content": "一 个 食堂 在 4 月份 的 前 10 天 每天 烧煤 340 千克 ， 后 20 天 中 每天 比 原来 节约 30 千克 ， 这个 月 平均 每天 烧煤 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14486", "content": "有 1040 人 参加 电视大学 学习 ， 按照 每 8 人 准备 一台 电视机 ， 已经 准备 了 120 台 ， 还 需要 为 多少 人 准备 电视机 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2628", "content": "小 军 和 小 明 共有 故事书 24 本 ， 小 明 的 故事书 比 两 人 的 总数 的 (3/4) 少 3 本 ， 小 明 有 多少 故事书 多少 本 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10247", "content": "a 、 b 两地 相距 840 千米 ， 甲 、 乙 两车 分别 从 a 、 b 两地 同时 相对 开出 ， 甲 车 每 小时 行 90 千米 ， 乙 车 每 小时 行 120 千米 ． 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17305", "content": "修 一条 公路 ， 第一天 修 了 全长 的 25% ， 第 二 天 修 了 90 米 ， 第 3 天 修 了 150 米 ？ 这 条 公路 长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19528", "content": "计划 一批 零件 180 个 ， 小 王 3 小时 做 了 计划 的 (1/6) ， 照 这样 计算 ， 完成 全部 零件 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17706", "content": "学校 买 了 排球 和 篮球 各 6 个 ， 一 共用 去 510 元 ， 一个 排球 40 元 ， 一个 篮球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1264", "content": "王老师 为 班上 买 回 了 3 本 图书 ， 付给 营业员 100 元 ， 找回 7 元 钱 ． 平均 每 本书 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13747", "content": "4 辆 汽车 7 天 节油 35.28 千克 ， 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5040", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 1.5 小时 行驶 了 96 千米 ， 这时 离 乙地 还有 134.4 千米 ． 照 这样 的 速度 ， 这辆 汽车 从 甲地 到 乙地 一共 需要 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12370", "content": "某 公司 兴建 一幢 大楼 ， 实际 投资 120 万元 ， 比 计划 节约 5 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19226", "content": "玲玲 和 小 丽 去 买 丝带 ， 小 丽 买 了 (1/5) 米 ， 玲玲 买 了 (2/5) 米 ． 两 人 一共 买 了 多少 米 丝带 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "23118", "content": "一 个 工程队 修筑公路 ， 前 5 天 每天 筑路 25.5 米 ． 后 3 天 共 筑路 78.5 米 ， 这 几天 中 平均 每天 筑路 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11371", "content": "学校 买进 一批 树苗 ， 第一次 运来了 180 棵 ， 第 二 次 运来了 总数 的 (1/4) ， 这时 运 来 的 与 没 运 来 的 棵 树 比 是 4 ： 3 ． 学校 计划 买 树苗 多少 棵 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2165", "content": "修路 队 3 天 完成 了 任务 的 (1/9) ， 照 这样 计算 ， 多少 天 可以 完成 任务 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19160", "content": "某 数 加上 1 ， 减去 2 ， 乘以 3 ， 除以 4 得 9 ， 求 这个 数 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3604", "content": "第 二 实验 小学 四年级 有 12 个 班 ， 每班 有 8 个 小组 ， 共 为 灾区 捐 图书 864 本 ， 平均 每个 小组 捐 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2629", "content": "有 180 名 学生 做 卫生 ， 平均 分成 5 队 ， 每队 分成 4 组 ， 平均 每组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22130", "content": "一 条 绳子 ， 剪 去 了 (5/6) ， 这 条 绳子 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6904", "content": "车 南站 货场 有 货物 4.25 万吨 ， 每天 运出 0.37 万吨 ， 运 了 5 天 ， 剩下 的 货物 要求 在 4 天 内 运 完 ， 平均 每天 需 运出 货物 多少 万吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1998", "content": "挖 一条 330 米 长 的 隧道 ， 有 甲 、 乙 两支 工程队 从 两端 同时 施工 ， 甲队 每天 向前 挖 16 米 ， 乙 队 每天 向前 挖 17 米 ， 挖通 这 条 隧道 需要 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10935", "content": "某 型号 空调 0.8 后 的 价钱 是 2400 元 ， 该 型号 的 空调 原价 几元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14239", "content": "某 数 的 6 倍 - 1 ， 得到 的 差 为 3 ， 那么 ， 这个 数 的 9 倍 + 4 ， 和 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4273", "content": "某 车间 用 两台 机床 加工 2160 个 零件 ， 第一台 机床 每 小时 加工 24 个 ， 第 二 台 机床 每 小时 加工 30 个 ， 如果 每天 工作 8 小时 ， 加工 完 这 批 零件 需要 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21875", "content": "学校 多功能 室 主席台 下 有 15 排座位 ， 每排 坐 10 人 ， 台上 有 8 个 座位 ， 多功能 室 能 做 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21828", "content": "小 明 原有 30 元 ， 妈妈 又 给 了 他 50 元 ， 小 明 把 这些 钱 的 (2/5) 捐给 了 灾区 ， 他 捐 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11808", "content": "将 一 壶 咖啡 的 (1/5) 倒入 一个 杯子 中 ， 离 杯子 满 还 差 10 毫升 ． 如果 将 这 壶 咖啡 的 (1/4) 倒入 这个 杯子 ， 正好 装满 杯子 ． 这 壶 咖啡 有 多少 毫升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15691", "content": "小 方 看 一 本书 ， 已经 看 了 136 页 ， 剩下 的 每天 看 15 页 ， 18 天 看 完 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16904", "content": "钢笔 每盒 6 枝 ， 每盒 98 元 ， 买 24 枝 钢笔 ， 一共 要 用 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7547", "content": "学校 购回 40 筒 乒乓球 ， 每 筒 12 个 ， 共用 了 2400 元 ， 每个 乒乓球 售价 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17303", "content": "两辆 汽车 分别 从 甲 、 乙 两地 同时 相向 而 行 ， 4 小时 相遇 ． 甲 车 每 小时 行 86 千米 ， 乙 车 每 小时 多行 12 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19022", "content": "食堂 买来 一些 大米 ， 吃 去 16 袋 ， 还 剩 28 袋 ． 食堂 买来 大米 多少 袋 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1237", "content": "一 个 车轮 的 直径 是 0.5 米 ， 它 滚动 一周 所 走 的 路程 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8868", "content": "小 明 跑 了 1600 米 ， 小 刚跑 的 是 小 明 的 (7/8) ， 小 勇 跑 的 是 小 刚 的 (3/4) ， 小 勇 跑 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3013", "content": "小 丽 看 一本 故事书 ， 看 了 12 天 ． 平均 每天 看 50 页 ， 还 剩下 175 页 ， 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11322", "content": "一 个 车间 计划 6 月份 生产 400 个 零件 ， 上 半月 完成 了 40% ， 现在 要 使 实际 产量 超额完成 10% ， 下半月 还 必须 生产 多少 个 零件 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6841", "content": "5 （ 1 ） 班 有 学生 50 人 ， 其中 有 女生 21 人 ， 男生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22666", "content": "一 种 农药 ， 用药 和 水 按照 1 ： 500 配制 而 成 ， 现有 25 千克 药液 ， 则 需 用水 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10163", "content": "张老师 6 月 10 日 领 得当 月工资 1200 元 ， 按照 个人所得税法 规定 ， 每月 个人收入 超过 800 元 的 部分 ， 应 按 5% 的 税率 征收 个人所得税 ． 张老师 这个 月 应 交纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18442", "content": "一 根 钢管 长 12 米 ， 要 把 它 锯 成 每 4 米 的 一段 ， 共 需要 20 分钟 ， 锯 一次 需要 多少 分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16376", "content": "1000 千克 青菜 早晨 测 得 它 的 含水率 为 97% ， 这些 菜 到 了 下午 测 得 含水率 为 95% ， 那么 这些 菜 的 重量 减少 了 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5594", "content": "计算 ： 25 / （ 23 / 8 ） * 253 = ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6192", "content": "6 千米 的 (2/5) = 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12511", "content": "一 辆 汽车 以 每 小时 80 千米 的 速度 从 甲 城 去 乙 城 3 小时 行 了 全程 的 (3/4) ． 甲乙 两城 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14090", "content": "一 条 长 (5/10) 米 的 绳子 和 一条 长 (3/10) 米 的 绳子 合 起来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8508", "content": "一 双 运动鞋 38 元 ， 一双 旅游鞋 的 价钱 是 运动鞋 的 4 倍 ， 旅游鞋 价钱 比 运动鞋 多 几元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4251", "content": "一 个 长方形 的 宽 是 10 厘米 ， 长 比 宽 多 2 厘米 ， 则 周长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "2721", "content": "一 段 钢管 截去 (2/3) ， 刚好 是 4 米 ， 这 段 钢管 原有 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6000", "content": "一 本 故事书 共有 180 页 ， 一本 连环画 共有 45 页 ． 连环画 的 页数 是 故事书 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18727", "content": "学校 有 科技 书 1800 本 ， 故事书 的 本 数 比 科技 书 的 2 倍 少 350 本 ， 故事书 和 科技 书 一共 有 多少 本 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19262", "content": "计算 ： 2006 * 20052006 - 2005 * 20062005 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9803", "content": "修路 队 要 修 一条 199 千米 的 公路 ， 修 了 5 天 后 还 剩 69 千米 ， 修路 队 平均 每天 修 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15548", "content": "一 台 拖拉机 (5/6) 小时 耕地 (7/8) 公顷 ， 照 这样 计算 ， 一 小时 可以 耕地 多少 公顷 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6252", "content": "一 列车 通过 530 米 的 隧道 要 40 秒钟 ， 以 同样 的 速度 通过 380 米 的 大桥 要 用 30 秒钟 ， 这 列 火车 车长 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4657", "content": "5 辆 汽车 12 天 共 节约 汽油 240.6 千克 ， 平均 每辆 汽车 每天 节约 汽油 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17684", "content": "将 2 个 同样 的 小 长方体 拼成 一个 大 长方体 ， 已知 每个 小 长方体 的 长 、 宽 、 高 分别 是 5 厘米 、 4 厘米 、 3 厘米 ， 那么 拼成 的 大 长方体 表面积 最大 = 多少 平方厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.7, "length": 17}
-{"question_id": "9513", "content": "商店 出售 录音机 ， 每 台 原价 430 元 ， 现价 打 0.9 出售 ， 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2172", "content": "自行车厂 去年 生产 自行车 6000 辆 ， 今年 生 生产 自行车 7200 辆 ， 今年 比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21889", "content": "三年级 同学 去 参加 植树 劳动 ， 女生 有 256 人 ， 男生 有 196 人 ． 每 4 人 分成 一组 ， 一共 可以 分成 多少 组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21813", "content": "一 种 电视 原价 2300 亓 ， 现在 降价 (1/5) ， 现有 的 价格 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18263", "content": "万通 超市 用 35000 元 ， 钱 重新 装修 了 店铺 ， 比 计划 少 用 5000 元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17483", "content": "6 一节 那天 ， 新华书店 举行 促销 活动 ， 所有 书 按 原价 打 0.8 出售 ． 小 明 买 了 一套 原价 是 160 元 的 《 海洋 世界 》 丛书 ， 打折 后 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15367", "content": "一 辆 汽车 3 小时 行驶 了 129 千米 ． 照 这样 的 速度 从 甲地 到 乙地 还要 行驶 5 小时 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21443", "content": "张 大伯 收 了 一批 西瓜 ， 第一天 卖出 了 总数 的 (1/5) ， 第 二 天 卖出 了 总数 的 (1/6) ， 两天 共 卖出 总数 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17596", "content": "缝纫 组 有 18 人 ， 平均 每人每天 做 3 套 衣服 ， 4 月份 工作 25 天 ， 一共 可以 做 多少 套 衣服 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9356", "content": "琦 琦 看 一本 故事书 ， 已经 看 了 全书 的 (2/9) ， 还 剩 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "732", "content": "一 种 玩具 熊 ， 原来 每 只 用布 0.8 米 ， 改进 方案 后 ， 现在 每 只 用布 0.6 米 ， 原来 做 150 只 的 布 ， 现在 可以 做 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8628", "content": "美术班 有 男生 20 人 ， 是 女生 的 (5/6) ， 近视 的 女生 是 女生 的 (1/6) ， 近视 的 女生 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "99", "content": "一 件 儿童 上衣 价格 是 32 元 ， 一件 成人 上衣 价格 是 288 元 ． 一件 成人 上衣 的 价格 是 一件 儿童 上衣 价格 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13160", "content": "把 一些 花 摆 成 实心 正方形 ， 每 条 边 都 有 8 盆花 ， 一共 有 多少 盆花 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2496", "content": "轿车 时速 可 达 180 千米 ， 货车 的 时速 是 轿车 的 (1/3) ． 货车 的 时速 = 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6166", "content": "南京长江大桥 约 长 6800 米 ， 武汉长江大桥 相当于 它 的 (1/4) ， 虎门 大桥 是 武汉长江大桥 的 长度 的 6 倍 ， 虎门 大桥 长 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8886", "content": "某班 的 缺勤 率 为 5% ， 到校 有 38 人 ， 缺勤 的 有 多少 人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17691", "content": "一 件 名牌 运动衣 原价 350 元 ， 现在 打 0.5 出售 ， 合 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5936", "content": "一 列 火车 每 小时 行驶 180 千米 ， 比 一辆 汽车 的 速度 快 120 千米 ． 从 甲 城 到 乙 城 火车 行驶 了 3 小时 ， 汽车 需要 行驶 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21601", "content": "妈妈 身高 1.64 米 ， 李 芳 比 爸爸 矮 0.29 米 ， 妈妈 比 李 芳 高 0.15 米 ， 爸爸 身高 = 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5388", "content": "某 作家 从 出版社 领取 稿费 5800 元 ． 按规定 ， 稿费 如果 超过 800 元 ， 超出 部分 按 14% 缴纳 个人所得税 ， 这位 作家 实 得 稿费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1764", "content": "小海 到 商店 买 了 5 本 练习本 和 一些 铅笔 ， 共用 了 9.5 元 ． 练习本 1.5 元 一本 ， 铅笔 0.5 元 一支 ． 小海 买 了 几支 铅笔 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19457", "content": "计算 ： 345345 * 788 + 690 * 105606 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3742", "content": "一 条 路 已修 了 全长 的 (3/5) ， 还 剩 120 千米 没 修 ， 这 条 路 全长 有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5472", "content": "物流 公司 为 超市 送 大米 ， 上午 送 了 4 次 ， 每次 送 4.5 吨 ， 下午 送 了 6 次 ， 共 送 去 大米 19 吨 ， 物流 公司 平均 每次 送 大米 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11962", "content": "一 个 工程队 挖土 方 ， 连续 挖 7 天 ， 每天 都 挖 210 方 ． 这个 工程队 共 挖 多少 方 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5004", "content": "（ 附加 题 ） 少先队员 利用 暑期 时间 举办 军事 夏令营 ． 某 天 出 早操 ， 排成 两列 纵队 ， 甲队 301 人 ， 乙 队 103 人 ， 快步 走 每分钟 行 90 米 ， 跑步走 每分钟 行 100 米 ， 每 两个 间隔 距离 为 0.5 米 ， 排头 看齐 ， 甲队 跑步走 ， 乙 队 快步 走 ， 按 同一 方向 ， 多少 分钟 后 ， 甲队 超过 乙 队 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19444", "content": "星星 小学 有 学生 840 人 ， 三年级 学生 数 是 全校学生 总数 的 (2/7) ， 三年级 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "210", "content": "扬 桥 村 要 挖 一条 480 米 的 水渠 ， 第一天 挖 了 60% ， 第 二 天 挖 了 (1/8) ， 两天 共 挖 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16698", "content": "华 誉 养鸡场 一 房 内 有 公鸡 65 只 ， 母鸡 只 数 是 公鸡 的 7 倍 ， 这个 房 内 共有 多少 只 鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6186", "content": "在 一个 乘法 算式 中 ， 一个 因数 是 35 ， 积 是 770 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14206", "content": "一 个数 的 40% 是 18 ， 这个 数 的 60% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4677", "content": "学校 买来 一批 新书 ， 借给 同学 275 本 ， 还 剩 225 本 ． 这 批 新书 中 有 科普知识 291 本 ， 其余 的 是 故事书 ． 故事书 有 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "844", "content": "益民 小学 植树 180 棵 ． 其中 (1/5) 是 六年级 种 的 ， (1/4) 是 五年级 种 的 ， 六年级 一共 植 了 多少 棵 树 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18053", "content": "王 妍 的 奶奶 家养 了 2 只 公鸡 、 4 只 母鸡 ， 共生 蛋 28 个 问 平均 每 只 鸡 生 了 几个 蛋 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11308", "content": "小 明 看 一 本书 ， 已经 看 完 了 (1/3) ， 再 看 16 页 就 看 完全 书 的 (3/5) ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10280", "content": "李 大爷 买 了 4 只 羊 ， 用 了 100 元 ， 他 还 想 再 买 8 只 这种 羊 ， 需要 再 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23092", "content": "一 辆 汽车 往 城里 运货 ， 去 时 每 时 行 45 千米 ， 行 了 4 小时 ， 返回 时 只用 了 3 小时 ， 返回 时 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "67", "content": "李 大爷 买 了 3 年期 的 国家 建设 债券 1000 元 ， 如果 年利率 为 5.74% ， 到期 时 他 可 获 本金 和 利息 共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15355", "content": "林场 计划 种植 树苗 750 棵 ， 第一天 种 了 550 棵 ， 还 剩下 全部 树苗 的 几分 之 几 没有 种 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6441", "content": "三年级 有 107 个 小朋友 去 春游 ， 带 矿泉水 的 有 78 人 ， 带 水果 的 有 77 人 ， 每人 至少 带 一样 ． 三年级 既 带 矿泉水 又 带 水果 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17674", "content": "甲乙 两车 从 相距 140 千米 的 两地 开出 ， (4/7) 小时 相遇 ． 甲 车 每 小时 行 33 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20441", "content": "把 一根 木料 锯 成 6 段 要 30 分钟 ， 照 这样 计算 ， 锯 成 5 段 要 用 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9552", "content": "果园 树 有 苹果树 540 棵 ， 比 梨树 多 (1/5) ， 梨树 有 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1363", "content": "一 列 客车 与 一列 货车 从 相距 405 千米 的 两地 相向 而 行 ， 经过 4.5 小时 两车 相遇 ， 已知 客车 每 小时 行驶 50 千米 ， 货车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "804", "content": "一 台 电冰箱 打 0.7 出售 是 1680 元 ， 这 台 电冰箱 原价 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3649", "content": "一 件 衣服 ， 原价 120 元 ， 现价 是 原价 的 (2/3) ， 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2913", "content": "a 、 b 两地 相距 320 千米 ， 甲 、 乙 两车 分别 从 a 、 b 两地 同时 相向 而 行 ， 2 小时 后 相遇 ， 已知 甲 、 乙 两车 的 速度 比 是 7 ： 9 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12706", "content": "爸爸 将 1000 元 钱 存入 银行 ， 定期 一年 ， 年利率 是 4.14% ． 到期 后 ， 他 应得 利息 多少 元 ． （ 要 缴纳 5% 的 利息税 ）", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "17640", "content": "修 一条 3000 米 的 水渠 ， 30 天 修 了 2250 米 ， 照 这样 计算 ， 修 完 这 条 水渠 还 需 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1661", "content": "一 艘 货轮 的 最大 载重量 是 5000 吨 ， 每 只 集装箱 的 质量 为 40 吨 ． 这 艘 货轮 最 多 可以 装载 这样 的 集装箱 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19000", "content": "青藏铁路 施工队 要 修 一道 210 米 的 隧道 ， 已经 修 了 96 米 ， 余下 的 要 在 3 个 月 内 修 完 ， 平均 每月 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16011", "content": "一 台 收割机 (3/4) 小时 收割 了 (2/3) 公顷 小麦 ． 这 台 收割机 1 小时 能 收割 多少 公顷 小麦 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "813", "content": "桃树 有 24 棵 ， 梨树 比 桃树 少 (1/3) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9903", "content": "某 商场 商场 去年 销售 了 1000 台 康佳 电视 ， 去年 的 销售 比 今年 减少 了 50% ， 今年 销售 了 多少 台 康佳 电视 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10797", "content": "除数 是 24 ， 商 是 25 ， 余数 是 19 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21540", "content": "一 只 书包 64 元 ， 一个 文具盒 的 价钱 是 书包 的 (1/4) ， 一枝 钢笔 的 价钱 是 一个 文具盒 的 (1/2) ， 一枝 钢笔 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19855", "content": "甲乙 两 人 同时 从 a 地 到 b 地 ， 甲 比 乙 早 到 3 小时 ， 甲 每 小时 行 10 千米 ， 乙 每 小时 行 8 千米 ， 甲 走 完全 程 要 几小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4526", "content": "一 块 地 的 (5/8) 种 了 玉米 ， 剩下 的 种 土豆 ， 种 土豆 的 地 占 整块地 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4939", "content": "一 块 布料 做 上衣 用 去 (3/9) ， 做 裙子 用 去 (2/9) ， 一 共用 去 这块 布 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20767", "content": "妈妈 买 了 白布 15 米 ， 买 的 花布 比 白布 多 (1/3) 米 ． 买 花布 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3375", "content": "一 共有 960 个 杯子 ， 每 6 个 装 一盒 ， 每 8 个 装 一箱 ， 一共 能 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13186", "content": "一 堆 黄沙 有 150 吨 ， 用 载重 8 吨 的 卡车 运 了 13 次 ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6175", "content": "某 茧 站 去年 收购 茧 3.2 吨 ， 今年 计划 比 去年 增收 20% ， 现在 已经 收购 2.5 吨 ， 还 需 收购 多少 吨 就 能 完成 今年 计划 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19213", "content": "某项 工程 实际 投资 75 万元 ， 比 计划 省 5 万元 ， 节省 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22691", "content": "一 种 压路机 的 前轮 直径 是 1.5 米 ， 每分钟 转 8 圈 ， 压路机 每分钟 前进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11238", "content": "一 本 故事书 有 240 页 ， 小 明 第一天 看 了 它 的 (1/6) ， 第 二 天 看 的 页数 是 第一天 的 (7/8) ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "16327", "content": "两个 工程队 共同 开凿 一条 长 126 米 长 的 隧道 ， 各 从 一端 同时 相向 施工 ， 14 天 打通 ， 甲队 每天 开凿 5 米 ， 乙 队 每天 开凿 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20014", "content": "一 根 电线 全长 32 米 ， 第一次 用 去 了 全长 的 20% ， 第 二 次 用 去 了 全长 的 (3/10) ． 两次 共用 去 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6548", "content": "在 学校 林荫道 一侧 插 彩旗 ， 每隔 5 米 插 一面 ， 从 一端 到 另一端 一共 插 了 8 面 ， 这 条 林荫道 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5992", "content": "36 与 63 的 积 ， 减去 2678 / 13 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19488", "content": "蜗牛 的 爬行 速度 是 0.045 千米 / 时 ． 如果 要 爬行 0.135 千米 ， 蜗牛 要 爬 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9499", "content": "小 芳 看 一本 80 页 的 书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 25% ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22944", "content": "李 爷爷 买 3 只 小羊 用 了 75 元 ， 他 还 想 再 买 5 只 这样 的 小羊 ， 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22782", "content": "甲地 到 乙地 150 千米 ， 一辆 汽车 从 甲地 出发 ， 走 了 全程 的 (4/5) ， 走 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4828", "content": "果园 里 有 30 桃树 ， 梨树 棵 数 比 桃树 少 (3/5) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7935", "content": "今年以来 ， 枣阳市 着力 做 大 做 强 棉花 加工 产业 ， 市政府 引导 加工 大户 向 纵深 延伸 ， 发展 棉花 纺纱 、 棉短绒 、 油脂 加工 等 项目 ． 某 公司 用 6 台 织布机 每天 织布 1800 米 ， 增加 4 台 同样 的 织布机 后 ， 每天 可以 织布 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1018", "content": "爸爸 买来 181 本 新书 后 ， 现在 书架上 有 900 本书 ， 书架上 原来 有 书 多少 本 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "107", "content": "270 比 一个 数 的 (2/3) 多 30 ， 求 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14812", "content": "一 个 正方体 的 6 个 面上 分别 标 上 a 、 b 、 c 、 d 、 e 、 f ， 投掷 这个 正方体 一次 ， 每个 字母 朝 上 的 可能性 都 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12504", "content": "小 明 有 60 张 邮票 ， 小 红 比 小 明 多 (1/5) ， 小 红 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8123", "content": "把 8 支 红 铅笔 和 2 支 蓝 笔 放在 一个包 里 ， 让 你 每次 往 里 摸 一次 ， 摸 后 放 回 ， 这样 摸 了 20 次 ， 摸 出 蓝 铅笔 的 可能性 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13211", "content": "把 一张 纸 的 (4/7) 平均 分成 3 份 ， 每份 是 这 张 纸 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20689", "content": "饲养场 今年 养猪 2009 头 ， 比 去年 养猪 头数 的 3 倍 少 220 头 ， 去年 养猪 多少 头 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11328", "content": "同学 们 编排 体操比赛 的 队形 ． 如果 每行 站 12 人 ， 可以 排 4 行 ． 如果 每行 站 8 人 ， 可以 排 几行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2686", "content": "一 袋 大米 ， 吃 了 (2/5) ， 剩下 的 比 吃掉 的 多 10 千克 ， 这 袋 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13188", "content": "光明 小学 图书馆 拥有 丰富 的 图书 ， 其中 故事书 约 占 (1/3) ， 科技 书 约 占 (1/5) ． 剩下 的 其他 书 占 图书馆 存 书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17202", "content": "一 个 文具盒 11.40 元 ， 一枝 钢笔 6.80 元 ， 小 华 带 了 30 元 钱 ， 买 了 一个 文具盒 和 一枝 钢笔 ， 还 剩下 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3033", "content": "小 红 读 一本 320 页 的 书 ， 第一天 读 了 它 的 (5/8) ， 第 二 天 应从 第 多少 页 开始 读 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1587", "content": "一 个数 的 (5/8) 是 25 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10049", "content": "一 件 上衣 原价 85 元 ， 现在 按 原价 打 “ 0.8 ” 出售 ， 现价 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "653", "content": "两个 因数 的 积 是 96 ， 其中 一个 因数 是 6 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9451", "content": "张 庄 砖瓦厂 上半年 计划 用 煤 400 吨 ， 实际 用 煤 388 吨 ， 节约 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19854", "content": "比 35 的 (4/5) 少 0.2 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20407", "content": "99 + 9 + 9999 + 999 + 99999 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "4444", "content": "一 个数 的 30% 正好 等于 36 的 (3/4) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10704", "content": "一 堆 煤 有 220 吨 ， 第一天 运走 总数 的 (1/5) ， 第 二 天 运走 总数 的 (1/4) ， 这时 还 剩下 几分 之 几 没有 运走 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16171", "content": "一 个 平行四边形 的 面积 是 25.5 平方分米 ， 高 是 5.1 分 米 ， 它 的 底 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13513", "content": "一 个 等腰三角 形 的 周长 是 78 厘米 ， 一 腰 长 25 厘米 ， 底边 长 = 多少 厘米 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22631", "content": "学校 买来 科技 书 206 本 ， 比 故事书 的 2.5 倍 多 31 本 ， 买来 故事书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5376", "content": "欣欣 果园 栽 梨树 952 棵 ， 栽 桔树 34 棵 ， 梨树 棵 数 是 桔树 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12808", "content": "语文 老师 推荐 了 a 、 b 两本 课外读物 ， 全班同学 每人 都 至少 买 了 一本 ． 已知 有 (2/3) 的 同学 买 了 a ， (5/8) 的 同学 买 了 b ， 14 名 同学 两本 都 买 了 ． 该班 共有 多少 名 同学 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6038", "content": "某校 上个月 用电 320 千瓦时 ， 本月 比 上 月 节约 5% ， 本月 用电 多少 千瓦时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1157", "content": "小 丁丁 看 一本 科技 故事书 ， 已经 看 了 42 页 ， 剩下 的 页数 正好 是 已 看 的 5 倍 ， 小 丁丁 还有 多少 页 没有 看 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4135", "content": "李 明 看 一 本书 ， 已经 看 的 比 全书 的 (3/4) 少 6 页 ， 还 剩 全书 的 (1/3) 没有 看 ， 全书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9635", "content": "一 辆 轿车 从 甲地 开往 乙地 ， 4 小时 行驶 了 320 千米 ， 照 这样 的 速度 ， 去 乙地 还 需 3 小时 ， 甲 、 乙 两地 相距 多少 千米 ？ ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15437", "content": "快车 每 小时 行 83 千米 ， 慢车 每 小时 行 68 千米 ． 5 小时 后 ， 快车 一共 比 慢车 多行 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20386", "content": "小 丽 的 身高 比 小 华 矮 (1/16) ， 小 丽 的 身高 1.35 米 ， 小 华 身高 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4182", "content": "某 酒店 上个月 的 营业额 是 26.5 万元 ， 按 营业额 的 3% 上交 营业税 ， 应交 税款 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7674", "content": "信鸽 平均 飞行 76.5 km ， 比 长距离 飞行 最快 的 鸟 - - 雨燕 的 速度慢 55% ． 雨燕 平均 每 小时 可 飞行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14886", "content": "一 堆 煤 ， 运走 了 (5/8) ， 还 剩下 24 吨 ， 则 运走 了 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6695", "content": "一 桶 油 用 去 5.8 千克 ， 剩下 的 是 用 去 的 1.5 倍 ， 原来 油桶 里 一共 有 多少 千克 的 油 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14543", "content": "果园 里 有 一批 水果 ， 上午 运走 全部 的 (1/3) ， 下午 运走 120 千克 ， 这时 已经 运走 的 占 全部 水果 重量 的 37.5% ， 这 批 水果 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19214", "content": "人体 血液 在 动脉 中 的 流动 速度 是 50 厘米 / 秒 ， 在 静脉 中 的 流动 速度 是 动脉 中 的 (2/5) ， 在 毛细血管 中 的 速度 只有 在 静脉 中 的 (1/40) ． 血液 在 毛细血管 中 每秒 流动 多少 厘米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13489", "content": "上海 世博会 中国馆 的 建筑面积 为 160000 平方米 ， 比 日本 馆 面积 的 26 倍 还 多 4000 平方米 ， 日本 馆 的 建筑面积 大约 多少 平方米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19349", "content": "已知 两个 因数 的 积 是 33894 ， 其中 一个 因数 是 42 ， 则 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21458", "content": "操场上 有 12 排 学生 在 做操 ， 每排 人数 都 相同 ， 小 明 站 在 第 3 排 ， 从 排 头数 他 是 第 5 个 ， 从 排 尾数 他 是 第 10 个 ， 一共 有 多少 个 学生 在 做操 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9455", "content": "一 袋 水泥 重 50 千克 ， 2 袋 水泥 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5208", "content": "一 项 工程 ， 甲队 单独 做 需要 18 天 完成 ； 乙 队 单独 做 15 天 完成 全部 工程 的 (2/3) ． 如果 两队 合 做 ， 多少 天 可 完成 这项 工程 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15589", "content": "一 批 货物 ， 第一天 运出 总数 的 20% ， 第 二 天 运出 剩下 的 15% ， 这 批 货物 比 原来 少 了 多少 % ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14139", "content": "笑笑 买 了 1.6 千克 火龙果 ， 给 售货员 阿姨 20 元 钱 ， 找回 3.2 元 ． 火龙果 每千克 要 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18777", "content": "学校 买 5 台 电扇 ， 一台 140 元 ， 一共 要 用 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21266", "content": "一 根 10 厘米 长 的 铁丝 做 一个 腰 长 3 厘米 的 等腰三角 形 ， 这个 等腰三角 形 的 底 长 = 多少 厘米 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12914", "content": "学校 准备 给 16 个 班 发 练习本 ， 每班 240 本 ， 还 需 800 本 备用 ． 学校 应 买 多少 本 练习本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "606", "content": "有 一根 钢管 ， 要 锯 成 16 小 段 ， 需要 锯 多少 次 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13410", "content": "一 个数 的 5 倍 是 450 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7548", "content": "计算 1234 + 2341 + 3412 + 4123 = ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6803", "content": "一 座 桥 实际 造价 2100 万元 ， 比 原 计划 多用 了 (1/8) ， 原 计划 造价 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6811", "content": "一 根 绳子 ， 用 去 全长 的 (1/7) ， 刚好 比 原来 短 了 (9/10) 米 ， 这根 绳子 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2374", "content": "+6 表示 在 起点 的 东边 6 米 ， 如果 小林 从 起点 先 向 西 走 15 米 后 再 向东走 20 米 ， 那么 小林 这时 的 位置 可以 表示 为 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7425", "content": "长 4000 米 的 公路 ， 原 计划 每人每天 修 4 米 ， 派 20 人 来 完成 ， 实际 修 时 增加 了 5 人 ， 可以 提前 几天 完成 任务 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "1188", "content": "王师傅 要 加工 一批 零件 ， 第一天 完成 计划 的 (5/8) ， 第 二 天 完成 计划 的 (7/12) ， 实际 完成 的 超过 原 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20058", "content": "工人 师傅 安 电话 ， 一捆 电话线 第一次 用 去 了 15 米 ， 第 二 次 用 去 了 13 米 ， 还 剩下 60% ， 这 一捆 电话线 原来 有 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19576", "content": "一 辆 客车 从 甲 城 到 乙 城 ， 每 小时 行 85 千米 ， 全程 用 了 6.5 小时 ， 求 从 甲 城 到 乙 城 的 距离 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14078", "content": "181440 / 3 / 4 / 5 / 6 / 7 / 8 = ．", "knowledge": ["/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8218", "content": "商店 运进 男装 皮鞋 200 双 ， 女装 皮鞋 比 男装 皮鞋 多 (1/5) ， 商店 共 运进 皮鞋 多少 双 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18734", "content": "一 支 钢笔 单价 是 一支 圆珠笔 单价 的 3.5 倍 ， 老师 买 了 一支 钢笔 和 5 支 圆珠笔 做 奖品 ， 一 共用 去 8.5 元 ， 求 圆珠笔 的 单价 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19821", "content": "900 与 600 的 和 ， 除以 它们 的 差 ， 商 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18967", "content": "新 毛 温 氏 家禽 饲养场 养 的 鸡 比 鸭 多 (1/3) ， 已知 鸭 有 180 只 ， 问 养 的 鸡 比 鸭 多 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15629", "content": "一 台 洗衣机 原价 1450 元 ， 现 降价 20% 出售 ， 但 售价 仍 比 成本 高 (1/9) ． 这 台 洗衣机 成本 多少 元 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22155", "content": "大客车 和 小轿车 同 地 、 同方向 开出 ， 大客车 每 小时 行 60 千米 ， 小轿车 每 小时 行 84 千米 ， 大客车 出发 2 小时 后 小轿车 才 出发 ， 几小时 后 小轿车 追 上 大客车 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18637", "content": "(1/2) * (1/4) 与 (1/3) 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20447", "content": "春蕾 小学 图书室 文艺 类图书 占 (1/4) ， 自然科学 类图书 占 (3/8) ， 社会科学 类图书 占 (3/10) ． 文艺类 和 自然科学 类图书 比 社会科学 类图书 多 占 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7285", "content": "电影院 原来 共有 35 排座位 ， 每排 28 个 ， 扩建 后 增加 到 42 排 ， 每排 增加 了 6 个 座位 ， 扩建 后 这个 电影院 一共 有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16009", "content": "张 华 参加 800 米 跑步 比赛 ， 每分钟 跑 320 米 ， 跑 了 2 分钟 ， 距 终点 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7634", "content": "3 （ 1 ） 班 有 46 人 ， 其中 25 人 订阅 了 《 少年 科学 》 ， 22 人 订阅 了 《 少年 文艺 》 ， 有 18 人 两种 刊物 都 订阅 了 ． 有 多少 人 两种 刊物 都 没有 订阅 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "14016", "content": "今年 “ 6 一 ” 儿童节 ， “ 心连心 ” 艺术团 用 演出 收入 的 40% 捐助 贫困 儿童 ， 已知 此次 收入 共 75000 元 ， 据 了解 一个 贫困 儿童 一年 的 学杂费 是 300 元 ， 这些 钱 可 资助 多少 个 学生 交纳 一年 的 学杂费 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17477", "content": "甲乙 两车 同时 从 a 地 到 b 地 ， 甲 车 每 小时 行 55 千米 ， 乙 车 每 小时 行 65 千米 ， 经过 3 小时 ． 两车 相距 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7230", "content": "今年 在 我国 一个 湖区 越冬 的 有 16 只 丹顶鹤 ， 176 只 白天鹅 ． 白天鹅 的 只 数 是 丹顶鹤 的 几倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19113", "content": "上海 到 南京 的 高速公路 全长 370 千米 ， 卡车 从 南京 出发 ， 开往 上海 ， 每 小时 行 90 千米 ， 已经 行 了 190 千米 ， 卡车 到 上海 还要 行 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "674", "content": "某市 今年 投诉 商品质量 问题 的 消费者 有 348 人次 ， 比 去年 增加 了 45% ． 去年 投诉 商品质量 问题 的 消费者 有 多少 人次 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16523", "content": "甲 、 乙 两列 火车 同时 从 a 地 向 相反 的 方向 行使 ， 分别 开往 b 地 和 c 地 ． 已知 a 、 b 之间 的 路程 是 a 、 c 之间 路程 的 (9/10) ． 当 甲 车 行使 60 千米 时 ， 乙 车 行使 的 路程 与 剩下 路程 的 比 是 1 ： 3 ， 这时 两列 火车 离 目的地 的 路程 相等 ． 求 a 、 c 两地 之间 的 路程 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18720", "content": "六年级 一班 男生 比 女生 多 6 人 ， 女生 比 男生 少 (1/4) ， 这个 班 共有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21519", "content": "在 一段 100 米 的 街道 两旁 安装 路灯 ， 每隔 10 米 安装 一盏 （ 街道 的 两头 都 要 安装 ） ， 这 段 街道 一共 要 安装 多少 盏 路灯 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12830", "content": "王 大伯 家 今年 收获 (5/4) 吨 白菜 ， 收 的 萝卜 比 白菜 少 (1/5) ． 王 大伯 家 收 的 萝卜 比 白菜 少 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7597", "content": "妈妈 买来 一袋 10 千克 的 大米 ， 每 做 一顿饭 要 用 去 (2/5) 千克 ， 这 袋 大米 大约 能 做 多少 顿饭 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18745", "content": "某班 女生 与 男生 之 比 为 5.5 ： 4.5 ， 那么 女生 占 全班 的 百分比 为 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18309", "content": "一 辆 汽车 每次 运 1.25 吨 ， 运 了 6 次 ， 还 剩 2.8 吨 货物 没有 运走 ． 这 堆 货物 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17265", "content": "一 本书 已经 看 了 (2/5) ， 还 剩下 60 页 没有 看 ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4319", "content": "小 明 的 爸爸 把 2000 元 的 稿费 存入 银行 ， 存期 为 2 年 ， 年利率 为 2.70% ， 到期 支取 时 ， 小 明 的 爸爸 能 拿到 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16017", "content": "王 彬 看 一 本书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 全书 的 (1/4) ． 还 剩下 全书 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12698", "content": "某种 品牌 的 牙膏 每盒 8 元 ， 阳光 超市 实行 促销 活动 ， 买 3 盒 送 1 盒 ． 妈妈 需要 买 4 盒 ， 每盒 要 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12276", "content": "李 华 买 了 一辆 4700 元 的 摩托车 ． 按规定 ， 买 摩托车 要 缴纳 10% 的 车辆 购置税 ． 他 买 这辆 摩托车 一共 要 花 多少 元 钱 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22240", "content": "20 公斤 的 (3/4) = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1007", "content": "学校 买来 330 本 课外书 ， 后来 又 买来 120 本 ． 把 这些 课外书 平均 分给 15 个 班 ， 每个 班 能 分 到 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8784", "content": "食品 商店 运 来 350 瓶 鲜牛奶 ， 运 来 酸奶 的 瓶 数 是 鲜牛奶 的 1.8 倍 ． 食品店 运 来 多少 瓶 酸奶 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10513", "content": "退休 的 张老师 在 田径场 跑道 上 慢走 锻炼 ， 他 每分钟 走 75 米 ， 打算 走 3 圈 ， 已知 每圈 跑道 长 400 米 ． 他 走 完 要 多久 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11755", "content": "四年级 有 3 个 班 ， 每班 50 个人 ， 其中 女生 有 70 人 ． 男生 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3156", "content": "李老师 2010 年 6 月工资 是 2600 元 ， 按规定 每月 超过 2000 元 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 李老师 这个 月 实际 拿到 的 工资 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13474", "content": "天然气 化工厂 有 女工 45 人 ， 男工 比 女工 人数 的 5 倍 少 20 人 ， 男工 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5103", "content": "金利 服装厂 计划 每天 生产 西装 320 件 ， 25 天 完成 任务 ． 实际 每天 生产 400 件 ， 实际 用 几天 完成 任务 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16214", "content": "一 种 空调 现价 2100 元 ， 比 原价 降低 了 300 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16441", "content": "从 279 里 连续 减去 多少 个 9 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10390", "content": "拖拉机 耕地 ， 第一天 耕 了 (1/4) ， 第 二 天 又 耕 了 余下 的 (1/3) ， 最后 还 剩下 3.6 公顷 ， 这块 地 原来 有 多少 公顷 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20637", "content": "把 一些 图书 分给 某班 学生 阅读 ， 如果 每人 分 3 本 ， 则 剩余 20 本 ； 如果 每人 分 4 本 ， 则 还 缺 25 本 ． 则 这个 班 有 多少 学生 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17856", "content": "王 芳 看 一 本书 ， 原 计划 10 天 看 完 ， 实际 前 2 天 就 看 了 全书 的 (2/5) ． 照 这样 的 进度 ， 可以 提前 几天 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8739", "content": "学校 手工 组 做 绢花 送给 幼儿园 美化环境 ， 已经 做 了 372 朵 ， 已经 做 的 绢花 是 还要 做 的 绢花 数量 的 6 倍 ， 求 一共 要 做 多少 朵 绢花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7990", "content": "被除数 是 56 ， 除数 是 8 ， 商 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18672", "content": "华 风 小学 6 个 年级 的 同学 参加 跳绳 比赛 ， 每个 年级 有 5 个 班 ， 每班 有 23 人 参加 ． 一共 有 多少 人 参加 比赛 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14927", "content": "光明 小学 去年 有 小学生 2400 人 ， 今年 比 去年 减少 了 10% ． 今年 有 小学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14268", "content": "王 大伯 有 块 玉米地 ， 共 种 玉米 24 行 ， 平均 每行 115 棵 ． 平均 每 15 棵 可 收 玉米 4 千克 ， 这块 玉米地 可 收 玉米 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6135", "content": "比 300 少 20% 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2550", "content": "两地 相距 480 千米 ， 甲乙 两辆 汽车 同时 从 两地 出发 相向 而 行 ， 甲 车 每 小时 行 70 千米 ， 乙 车 每 小时 行 80 千米 ， 两车 几小时 后 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1828", "content": "一 块 菜地 有 800 平方米 ， 其中 (3/5) 种 西红柿 ， 西红柿 种 了 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10468", "content": "一 个 饲养 专业户 养鸡 420 只 ， 养鸭 的 只 数 是 鸡 的 (5/6) ， 鹅 的 只 数 是 鸭 的 (6/7) ． 养 鹅 多少 只 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3426", "content": "为 支援灾区 ， 兴隆 小学 开展 捐书 活动 ． 四年级 捐 了 120 本 ， 五年级 比 四年级 多 捐 12 本 ， 六年级 捐 的 本 数 是 五年级 的 2 倍 ， 六年级 捐 了 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6300", "content": "甲 数 的 (2/3) 等于 乙 数 的 (5/6) ， 甲乙 两 数 的 和 是 132 ， 甲 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14218", "content": "王 叔叔 开车 从 甲地 到 乙地 一 共用 了 3 小时 ， 每 小时 行 50 千米 ， 返回 时 每 小时 行 60 千米 ， 返回 时 用 了 多长时间 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16830", "content": "一 个 篮子 里 有 25 个 鸡蛋 ， 这个 篮子 和 鸡蛋 一共 重 1525 克 ， 篮子 重 400 克 ， 平均 每个 鸡蛋 重 多少 克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10648", "content": "120 千米 比 多少 千米 多 (4/5) 千米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4761", "content": "我校 要 为 图书室 新购 两种 少儿读物 ， 《 童话故事 》 每套 85 元 ， 《 作文选 》 每套 79 元 ， 每种 4 套 ， 一共 需要 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13286", "content": "王师傅 计划 12 小时 生产 零件 960 个 ， 实际 用 的 时间 比 计划 少 (1/3) ． 实际 每 小时 生产 零件 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12003", "content": "甲 数 的 (1/2) 与 乙 数 的 (1/3) 相等 ， 甲 数 是 60 ， 乙 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11352", "content": "一 共有 8 kg 桃 ， 平均 分给 10 只 猴子 ， 每 只 猴子 能 分 到 多少 千克 桃 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12652", "content": "一 列 客车 和 一列 货车 同时 从 甲 、 乙 两地 开出 ， 相向 而 行 ， 经过 6 小时 相遇 ． 客车 平均 每 小时 行 112 千米 ， 货车 平均 每 小时 行 88 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3534", "content": "把 一种 农药 和 水 混合 配制 成 药水 ， 农药 和 水 的 比值 是 (1/150) ． 现有 农药 4 千克 ， 要 加多少 千克 水 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17664", "content": "甲乙 两 人 相距 1200 米 ， 两 人 相向 而 行 ， 甲 每分钟 70 米 ， 乙 每分钟 50 米 ， 甲 带 一条 狗 ， 来往 奔跑 于 甲乙 两 人 之间 ， 每分钟 200 米 ， 甲乙 相遇 时 ， 狗 跑 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10668", "content": "每个 书架上 有 546 本书 ， 图书室 有 8 个 这样 的 书架 ， 一共 有 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4122", "content": "一 头 猪 的 体重 是 100 千克 ， 一头 奶牛 的 体重 比 猪 的 4 倍 还 多 162 千克 ． 这 头 奶牛 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2415", "content": "用 5 千克 面粉 做 馒头 ， 每个 馒头 用 (1/8) 千克 面粉 ． 把 这些 馒头 的 (3/10) 送给 奶奶 ． 送给 奶奶 多少 个 馒头 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18812", "content": "水果店 运 来 360 千克 苹果 ， 240 千克 梨 ． 如果 每 24 千克 装 一箱 ， 梨 比 苹果 少装 多少 箱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15938", "content": "一 个 筑路 队 筑 公路 ， 前 14 天 共 筑路 360 米 ， 照 这样 的 速度 ， 又 修筑 了 5 天才 完工 ， 这 条 路 全长 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "561", "content": "a 、 b 两地 之间 的 道路 分 上坡 和 下坡 两种 路段 ， 共 70 千米 ， 兰兰 上坡 速度 为 5 千米 / 时 ， 下坡 速度 为 7 千米 / 时 ， 去 时 用 了 10.5 小时 ， 则 返回 时 用 多少 小时 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18154", "content": "一 只 熊猫 5 天 吃 食物 135 千克 ， 一只 大象 比 一只 熊猫 每天 多 吃 食物 432 千克 ． 一只 大象 每天 吃 食物 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3171", "content": "一 张 长方形 硬纸板 长 12 厘米 ， 宽 9 厘米 ． 在 这个 长方形 中 ， 剪 去 一个 最大 的 正方形 ， 剩下 的 小 长方形 的 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2546", "content": "搬运 4000 个 玻璃瓶 ， 规定 搬 一个 得 运费 0.2 元 ， 但 打碎 一个 要 赔 1.3 元 ． 如果 运 完 后 共 得 运费 780.5 元 ， 搬运 中 打碎 几个 瓶子 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8417", "content": "上海 到 宁波 的 高速公路 全长 296 千米 ， 一辆 轿车 和 一辆 客车 分别 从 上海 和 宁波 两地 出发 相向 而 行 ． 两车 同时 出发 ， 途中 轿车 休息 了 0.5 小时 ． 已知 客车 平均 每 小时 行 92 千米 ， 轿车 平均 每 小时 行 108 千米 ， 客车 行驶 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4782", "content": "小 兰 看 一本 故事书 ， 第一天 看 了 18 页 ， 第 二 天 看 了 42 页 ， 这时 已 看 的 与 未 看 的 页数 之 比 是 2 ： 3 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5689", "content": "制作 一个 毛绒玩具 现在 的 成本 是 18 元 ， 比 原来 降低 了 (1/7) ， 毛绒玩具 原来 的 成本 相当于 一个 电动玩具 成本 的 (3/4) ， 一个 电动玩具 的 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5436", "content": "一 辆车 从 甲地 开往 乙地 ， 山路 占 全程 的 20% ， 上 山路 占 山路 的 40% ， 如果 上 山路 是 16 千米 ， 则 全程 = 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3850", "content": "纺织厂 的 工人 们 织 窗帘 ， 他们 接到 一个 360 块 的 订单 ， 如果 每天 织 40 块 ， 要 几天 才 可以 完成 任务 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17574", "content": "我 有 120 张 邮票 ， 是 小 明 的 4 倍 ， 小 军 比 小 明 多 15 张 ， 小 军 有 多少 张 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9287", "content": "商店 卖出 108 台 电视机 ， 是 电视机 总数 的 30% ， 原有 电视机 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21123", "content": "学校 运回 9 立方米 细沙 ， 把 这些 细沙 铺 在 一个 长 6 米 ， 宽 2.5 米 的 长方体 沙坑 里 ， 可以 铺 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21382", "content": "甲 乙丙 3 种 糖果 每千克 的 价格 分别 是 9 元 ， 7.5 元 ， 7 元 ， 现 把 甲种 糖果 5 千克 ， 乙种 糖果 4 千克 ， 丙种 糖果 3 千克 混合 在 一起 ， 那么 36 元 可 买 多少 千克 这种 糖果 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.8, "length": 19}
-{"question_id": "7832", "content": "一 桶 汽油 ， 先 用 去 总数 的 20% ， 再 用 去 剩下 的 (1/2) ， 这时 汽油桶 里 还 剩 60 千克 ， 这 桶 汽油 原来 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19580", "content": "水泥厂 计划 生产 一批 水泥 ， 第一个 月 完成 了 这 批 水泥 的 30% ， 第 二 月 生产 了 45 吨 ， 这时 还 剩下 这 批 水泥 的 (2/5) 没 生产 ． 这 批 水泥 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19394", "content": "甲 、 乙 两 工人 程 在 山 的 两边 同时 开凿 同一个 山洞 ， 甲队 每天 开 13.8 米 ， 乙 队 每天 开 15.2 米 ， 40 天 开通 ． 这个 山洞 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16058", "content": "龟 兔 赛跑 ， 全程 200 m ， 乌龟 爬 0.6 m 时 兔 就 跑 了 6 m ， 比赛 开始 兔 就 跑 了 105 m 便 开始 睡觉 ， 乌龟 不停 地 爬 ． 当 兔 醒来时 ， 龟 距 终点 只有 7.2 m 了 ， 兔 拼命 追 ， 龟 还是 得 了 第一 ． 龟 到 终点 时 兔 距 终点 还有 多少 m ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6867", "content": "一 套 校服 ， 上衣 59 元 ， 裤子 41 元 ， 购买 2 套 ， 一共 需要 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10164", "content": "学校 合唱队 有 48 人 ， dv 社团 的 人数 是 合唱队 人数 的 (2/3) ， 美术 小组 的 人数 是 dv 社团 人数 的 125% ． 美术 小组 由 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15839", "content": "一 张 办公桌 132.8 元 ， 比 一把 椅子 贵 36 元 ． 买 一把 椅子 和 一张 办公桌 需 付 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4225", "content": "三年级 4 班 的 5 个 小队 的 少先队员 去 摘 黄瓜 ， 每个 小队 9 人 ， 平均 每人 摘 13 千克 ， 一共 摘 了 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11038", "content": "铺 一条 公路 ， 已经 铺 了 6 千米 ， 正好 铺 了 全长 的 (3/5) ， 还 剩 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23126", "content": "山羊 100 只 ， 山羊 比 绵羊 少 (1/5) ， 绵羊 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1364", "content": "阳光 农场 有 桃树 240 棵 ， 是 梨树 棵 数 的 3 倍 ， 苹果树 棵 数 是 梨树 棵 数 的 4 倍 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6240", "content": "小学 六年级 学生 植树 150 棵 ， 五年级 比 六年级 植树 多 40% ， 五年级 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9462", "content": "有 一批 水果 ， 用 小筐 120 只 可 装运 完 ， 用 大 筐 80 只 也 可 装运 完 ， 已知 每 只 小筐 比 每 只 大 筐 少装 20 千克 ， 那么 这 批 水果 有 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10115", "content": "多少 除以 3 得 20 余 2 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19628", "content": "一 辆 客车 从 甲地 开往 乙地 ， 前 2 小时 每 小时 行 80 千米 ， 后 3 小时 每 小时 行 100 千米 ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22527", "content": "美术组 男生 有 6 人 ， 女生 有 11 人 ， 男生 人数 是 美术组 人数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15461", "content": "一 种 喷洒 蔬菜 的 药水 ， 农药 和 水 的 比 是 1 ： 200 ． 现有 2 千克 农药 ， 需要 加水 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15762", "content": "一 堆 煤 用 去 (3/5) 吨 ， 比 剩下 的 多 45% ， 这 堆 煤 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19977", "content": "爸爸 将 1000 元 存入 银行 ， 定期 一年 ， 年利率 是 3.25% ， 到期 后 ， 他 应得 的 利息 多少 元 （ 免征 利息税 ） ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16281", "content": "一 个数 的 (1/3) 比 这个 数 的 40% 少 15.6 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12173", "content": "学校 购买 课外书 发给 14 个 班 ， 每个 班 发 45 本 后 ， 还 剩 16 本 ． 学校 一共 购买 了 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20821", "content": "一 组 学生 参加 电脑 考试 ， 3 名 女生 共 得分 258 分 ， 5 名 男生 平均 每人 得分 90.8 分 ， 这 组 学生 的 平均 成绩 = 多少 分 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15728", "content": "学校 要 买 了 8 箱 乒乓球 ， 每箱 30 盒 ， 每盒 12 个 ， 每盒 买 24 元 ， 学校 买 乒乓球 用 了 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16310", "content": "3   （ 1 ） 班 同学 做 早操 ， 每排 7 人 ， 排 4 排 还 多 5 人 ． 全班 一共 多少 名 同学 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7944", "content": "某 厂 的 一种 产品 ， 原来 每件 成本 96 元 ， 技术革新 后 ， 每件 成本 降低 到 了 84 元 ， 每件 成本 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23006", "content": "教室 里 有 一些 女同学 和 25 个 男同学 ， 走出 3 个 男同学 和 15 个 女同学 后 ， 剩下 的 男同学 和 女同学 一样 多 ． 原来 有 女同学 多少 个 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7151", "content": "2012 年 诺贝尔文学奖 获得者 莫言 的 著作 《 莫言 文集 》 ， 在 当当网 上 打 0.7 出售 ， 售价 为 490 元 ， 书 的 标价 = 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12560", "content": "小 峰 将 12 个 红 玻璃球 、 5 个 蓝 玻璃球 和 8 个 绿 玻璃球 放入 一个 纸袋 里 ， 任意 从 纸袋 里 取出 一个 玻璃球 ， 取出 绿 玻璃球 的 可能性 是 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1963", "content": "甲 、 乙 两个 圆柱形 容器 ， 底 面积 比 为 6 ： 3 ， 甲 容器 水深 20 厘米 ， 乙 容器 水深 10 厘米 ， 再 往 两个 容器 中 注入 同样 多 的 水 ， 使得 两个 容器 中 的 水深 相等 ， 这时 水深 多少 厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "1586", "content": "装订 小组 计划 装订 一批 书 ， 每 小时 装订 222 本 ， 10 小时 可 装订 完 ． 如果 现在 要 比 原 计划 多 装订 1110 本 ， 现在 共 需 多少 小时 才能 装订 完 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6792", "content": "用 拖拉机 耕地 ， (1/2) 小时 耕 了 (11/9) 公顷 ， 正好 相当于 这块 地 的 (11/21) ． 这块 地 有 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17848", "content": "甲 车 和 乙 车 同时 从 两地 相对 开出 ， 8 小时 后 相遇 ， 甲 车 每 小时 行 80 千米 ， 乙 车 的 速度 是 甲 车 的 1.02 倍 ， 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "12565", "content": "果农 要 把 4500 千克 的 葡萄 装箱 运走 ， 每个 纸箱 最 多 装 15 千克 ， 如果 一辆 卡车 运 100 箱 ， 需要 几辆 卡车 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2366", "content": "一 辆 汽车 3 小时 行 120 千米 ． 照 这样 计算 ， 行 360 千米 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6156", "content": "有 一条 长 1600 米 的 公路 ， 在 公路 一侧 从头到尾 每隔 20 米 安装 一盏 路灯 ， 一共 要 准备 多少 盏 路灯 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4061", "content": "工地 有 一批 水泥 ， 上午 用 了 总数 的 (1/4) ， 下午 用 了 总数 的 40% ， 还 剩下 14 吨 ， 这 批 水泥 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9991", "content": "五年级 一班 有 学生 40 人 ， 其中 女生 有 21 人 ， 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21922", "content": "新桥镇 今年 共 养牛 1200 头 ， 比 去年 增加 了 (1/7) ， 去年 养牛 多少 头 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1296", "content": "一 个 化肥厂 原 计划 14 天 完成 一项 生产 任务 ， 由于 每天 多 生产 化肥 3.5 吨 ， 结果 9 天 就 完成 任务 ． 原 计划 每天 生产 化肥 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8235", "content": "学校食堂 买来 1500 千克 大米 ， 前 5 天 就 用 了 60% ， 还 剩下 多少 大米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3523", "content": "据统计 ， 前年 全国 高校 毕业生 达 630 万 人 ， 去年 全国 高校 毕业生 人数 比 前年 多 4.8% ， 去年 全国 高校 毕业生 有 多少 万 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6774", "content": "把 5 张 同样 长 的 纸 连接成 一张 长 纸条 ， 接头处 都 重叠 1 厘米 时 ， 全长 正好 是 40 厘米 ， 每张 纸条 的 长 = 多少 厘米 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9112", "content": "李 叔叔 在 商场 买 了 4 千克 苹果 和 2 千克 梨 ， 付给 售货员 20 元 ， 找回 了 5.6 元 ， 每千克 苹果 2.5 元 ， 每千克 梨 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8102", "content": "一 根 木料 用 去 40% 后 ， 还 剩 1.5 米 ， 这根 木料 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15343", "content": "一 堆 煤 每天 烧 6 吨 ， 可以 烧 40 天 ， 如 每天 少 烧 1.2 吨 ， 可以 多 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20304", "content": "某 机床厂 计划 每天 生产 机床 40 台 ， 30 天 完成 任务 ． 现在 要 提前 10 天 完成 任务 ， 每天 要 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16884", "content": "甲乙 两地 相距 274 千米 ， 一辆 客车 从 甲地 开出 ， 每 小时 行驶 95 千米 ， 一段时间 后 ， 离 乙地 还有 84 千米 ． 这辆 客车 已经 行驶 了 几小时 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10936", "content": "小 红 的 爸爸 通常 平均 每天 消费 4.5 元 话费 ， 他 查 了 一下 手机卡 中 的 话费 余额 ， 可以 用 16 天 ． 如果 从现在起 每天 节约 0.9 元 ， 这些 话费 可以 用 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2054", "content": "有 红球 7 个 ， 白 球 9 个 ， 混合 后 放到 一个 布袋 里 ， 问 一次 至少 摸 出 多少 个 ， 就 能 保证 两种 球 不同 色 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "23031", "content": "某校 开展 节约用电 活动 ， 前 4 个 月 共 节约用电 424 度 ． 照 这样 计算 ， 一年 （ 12 月 ） 能 节约用电 多少度 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22746", "content": "某 商品 按 每个 10 元 的 利润 卖出 5 个 所得 的 总 钱 数 ， 与 按 每个 25 元 的 利润 卖出 4 个 的 总 钱 数 相等 ， 这种 商品 每个 进价 = 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11445", "content": "一 辆 汽车 从 甲地 向 乙地 行驶 ， 行 了 一段 后 ， 距离 乙地 还有 220 千米 ， 接着 又 行 了 全程 的 25% ， 这时 已 行 路程 和 未 行 路程 的 比 是 5 ： 3 ， 求 甲乙 两地 距离 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6691", "content": "一 辆 汽车 从 甲地 开往 乙地 用 了 6 小时 ， 每 小时 行驶 80 千米 ， 返回 时 只用 了 5 小时 ， 这辆 汽车 返回 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5134", "content": "四年级 某班 50 人 ， 做 两 题 数学 选择题 ， 做 对 第一 题 的 有 36 人 ， 做 对 第 二 题 的 有 24 人 ， 两 题 都 对 的 18 人 ， 那么 两 题 都 没有 做 对 的 最 多 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21508", "content": "26 * 98 - 33 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16407", "content": "陈老师 出版 了 一本 《 小学 数学 解答 100 问 》 ， 获得 稿费 5000 元 ， 按规定 ， 超出 800 元 的 部分 应 缴纳 14% 的 个人所得税 ． 陈老师 实际 得到 稿费 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3905", "content": "王师傅 开车 从 县城 出发 ， 以 60 千米 / 小时 的 速度 向 张 村 送 化肥 ． 去 时 用 了 5 小时 ， 返回 时 用 了 4 小时 ， 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9288", "content": "一 个 正方形 鱼池 ， 在 它 的 周围 每隔 6 米 插 一根 柱子 ， 一共 插 了 10 根 ， 这个 鱼池 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4621", "content": "一 个 圆柱体 ， 底面 半径 是 2 厘米 ， 高 是 6 厘米 ， 它 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "4164", "content": "一 个 因数 是 36 ， 另 一个 因数 是 6 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5923", "content": "一 堆 煤 有 45 吨 ， 用 去 (2/5) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16730", "content": "一 桶 汽油 连 桶 共 重 25 千克 ， 用 去 (1/3) ， 连 桶 还有 17 千克 ． 原来 有 汽油 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17795", "content": "五年级 两个 班 的 学生 一起 排队 出操 ， 如果 9 人 排 一行 ， 多出 一个 人 ； 如果 10 人 排 一行 ， 同样 多出 一个 人 ． 这 两个 班 最少 共有 多少 人 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8997", "content": "服装厂 以前 做一套 西装 用 布料 2.4 米 ， 现在 改进 裁剪 技术 后 每套 可以 节约 布料 0.1 米 ． 现在 做 600 套 的 布料 ， 以前 只能 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "273", "content": "陕西 的 兵马俑 被称作 “ 世界 8 大 奇迹 之一 ” ， 共有 8000 件 陶俑 ， 其中 步兵 俑 占 陶俑 总数 的 39% ， 其他 陶俑 有 多少 件 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6735", "content": "甲 、 乙 两地 相距 770 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 42 千米 ， 汽车 开出 126 千米 后 ， 一辆 轿车 从 乙地 开往 甲地 ， 每 小时 行 50 千米 ， 轿车 开出 几小时 后 与 汽车 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21939", "content": "一 个 盒子 里 有 除 颜色 外 大小 相同 的 3 个 白 球 和 4 个 红球 ， 任意 摸 一个 ， 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16990", "content": "如果 一盒 蛋糕 吃掉 了 (1/4) 后 还 剩 12 块 ， 那么 这 盒 蛋糕 原来 有 多少 块 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3750", "content": "王 力 每天 白天 卖 报纸 可以 赚 12 元 钱 ， 但是 每天晚上 要 花掉 7 元 ， 如果 他 现在 身无分文 ， 那么 要 多少 天 才能 赚 够 500 元 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11896", "content": "粮食 加工厂 用 两台 磨面 机 同时 磨面 17280 千克 ， 第一台 磨面 机 每 小时 磨面 364 千克 ， 第 二 台 磨面 机 每 小时 磨面 356 千克 ， 如果 每天 工作 8 小时 ， 磨 完 这些 面 需要 多少 天 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9061", "content": "李 爷爷 把 5000 元 钱 存入 银行 ， 定期 3 年 ， 如果 年利率 为 3.69% ， 到期 后 可 得 本金 和 利率 一共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19539", "content": "在 一次 越野赛跑 中 ， 甲 、 乙 两 人 跑 完 了 全程 ， 甲 用 了 46 分钟 ， 如果 乙 的 速度 是 甲 的 2 倍 ， 那么 乙 用 了 多少 分钟 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10506", "content": "一 个 制衣 小组 计划 8 天 加工 200 套 服装 ， 实际 提前 3 天 就 完成 了 任务 ， 实际 每天 加工 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18640", "content": "有 一块 长 25.5 米 ， 宽 15 米 的 菜园 ， 如果 把 长 和 宽 都 增加 5 米 ， 菜园 面积 增加 多少 平方米 ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "9174", "content": "有 3600 人 到 动物园 玩 ， 其中 成人 占 (2/5) ， 成人 的 人数 相当于 小孩 人数 的 (3/4) ， 到 动物园 的 小孩 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18340", "content": "买来 足球 55 个 ， 买来 的 篮球 比 足球 少 20% ， 买来 篮球 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9048", "content": "一 个数 的 60% 比 24 的 (1/4) 多 3 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11443", "content": "某班 同学 18 个人 可以 植树 150 棵 ， 如果 要 植树 225 棵 ， 还 需要 派 多少 个 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2189", "content": "学校 第一天 运 来 3200 千克 煤 ， 第 二 天运 来 2400 千克 煤 ． 这些 煤 计划 烧 7 个 月 ， 平均 每个 月 烧煤 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4227", "content": "一 本 小说书 共有 200 页 ， 小 杰 第一天 看 了 后 ， 还 剩下 全书 的 (5/8) ， 则 第 二 天 应从 第 多少 页 开始 看 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8897", "content": "盒子 里 有 5 只 红袜子 和 4 只 白袜子 ， 小 方 至少 要 摸 出 多少 只 袜子 ， 才能 保证 有 两只 颜色 不同 的 袜子 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "1575", "content": "五年级 有 135 人 ， 六年级 的 人数 比 五年级 的 (4/5) 多 18 人 ， 六年级 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5372", "content": "李 叔叔 上 月 的 工资 为 2500 元 ， 扣除 2000 元 后 按 5% 的 税率 缴纳 个人所得税 ， 他 应 缴纳 个人所得税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5219", "content": "甲乙 两辆 汽车 同时 从 相距 237 千米 的 两个 车站 相向 开出 ． 经过 3 小时 两车 相遇 ． 甲 汽车 每 小时 行 38 千米 ， 乙 汽车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20945", "content": "一 块 白布 长 32 米 ， 一块 花布 的 长 是 白布 的 3 倍 少 14 米 ， 这块 花布 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19370", "content": "一 个数 扩大 1000 倍 后 ， 再 缩小 100 倍 是 0.56 ， 原来 这个 小数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3520", "content": "(9/10) * (2/5) / (4/9) 的 商 ， 积 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7042", "content": "老师 买 了 25 支 红 、 蓝 笔 ， 红笔 每支 1.2 元 ， 蓝 笔 每支 1.4 元 ， 共 花 了 33 元 ， 老师 买 了 蓝 笔 多少 支 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5796", "content": "在 助残 捐款 中 ， 五年级 学生 共 捐款 2400 元 ， 六年级 比 五年级 学生 多 捐款 (1/3) ， 两个 年级 共 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21436", "content": "一 本书 580 页 ， 李老师 看 了 11 天 后 还 剩下 30 页 ． 李老师 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6403", "content": "学校 有 14 棵 杨树 ， 杨树 的 棵 数 是 松树 的 2 倍 ， 柳树 比 松树 多 4 棵 ， 有 多少 棵 柳树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16539", "content": "一 艘 轮船 从 甲地 开往 乙地 ， 去 时 用 4 小时 ， 返回 用 7 小时 ， 甲乙 两地 相距 140 千米 ， 问 去 时 每 小时 比 返回 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13640", "content": "某校 的 两幢 教学楼 相距 144 米 ， 在 它们 之间 每隔 12 米 种 一棵 松树 ． 共 可 栽 松树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13387", "content": "有 面粉 250 千克 ， 比 大米 多 (1/4) ， 大米 有 多少 千克 ？ （ 只 列式 ， 不 计算 ）", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1506", "content": "一 辆 救护车 从 甲地 开往 青海 树 地震 灾区 ， 上午 行驶 3 小时 ， 每 小时 行驶 60 千米 ； 为了 尽快 救援 ， 下午 行驶 速度 每 小时 提高 了 10 千米 ， 行驶 4 个 小时 到达 ， 则 两地 相距 有 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "13185", "content": "王师傅 的 月工资 为 3000 元 ． 按照 国家 的 新税法 规定 ， 超过 2500 元 的 部分 应 缴 5% 个人所得税 ． 王师傅 每月 实际工资 收入 = 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6740", "content": "有 两班 同学 参加 劳动 ， 共 分 一批 树苗 ， 一班 分 得 的 棵 数 比 总数 的 30% 多 100 棵 ， 二 班 分 得 的 棵 数 比 总数 的 60% 少 50 棵 ， 则 这 批 树苗 有 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8758", "content": "一 个 圆柱 侧面 展开 是 一个 边长 为 9.42 分 米 的 正方形 ， 圆柱体 底面 直径 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20396", "content": "同学 们 参加 语文 与 数学 课外活动 的 一共 有 30 人 ． 参加 语文 课外活动 的 有 24 人 ， 参加 数学 课外活动 的 有 26 人 ， 则 两种 活动 都 参加 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19872", "content": "学校食堂 运回 一批 粮食 ， 其中 大米 占 粮食 总量 的 (3/4) ， 当 吃 了 36 千克 大米 后 ， 剩下 的 大米 占 粮食 总量 的 (3/5) ． 这 批 粮食 共 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "413", "content": "我国 是 一个 缺水 的 国家 ． 根据 1999 年 中国 水资源 公报 ， 我国 人均 水资源 约 为 2200 立方米 ， 仅 占 世界 人均 水平 的 25% ． 世界 人均 水资源 = 多少 立方米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13221", "content": "3 （ 1 ） 班 为 受灾 同学 捐书 960 本 ， 6 本 捆成 一捆 ， 8 捆 装 一箱 ． 能 装 多少 箱 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21952", "content": "一 个 修路 队 每天 修路 20 千米 ， 3 天 修 了 这 条 路 的 (1/3) ， 修 完 这 条 路 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11639", "content": "2 台 织布机 (3/4) 小时 共 织布 (39/5) 米 ， 每 台 织布机 每 小时 织布 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18478", "content": "甲 、 乙 两车 分别 从 a 、 b 两地 相向 而 行 ， 甲 车 每 小时 行驶 74.5 千米 ， 乙 车 每 小时 行驶 84.6 千米 ， 2.5 小时 后 两车 相遇 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20659", "content": "把 930 平均 分成 31 份 ， 每份 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5916", "content": "计算 ： 17 * (17/18) + 35 * (35/36) = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19908", "content": "马路上 路灯 的 电线杆 之间 相距 50 米 ， 陈老师 晚饭 后 去 散步 从 第 1 根 走 到 第 10 根 电线杆 ， 一共 走 了 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2434", "content": "一 袋 大米 重 80 千克 ， 第一次 售出 总数 的 (1/4) ， 第 二 次 售出 总数 的 (3/8) ， 两次 一共 售出 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20169", "content": "28 个 (4/7) 与 12 的 (5/24) 相加 ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7936", "content": "小 芳 为了 参加 演讲比赛 ， 她 准备 了 一篇 大约 900 字 的 演讲稿 ， 演讲 时间 为 5 分钟 ． 如果 要 作 一个 时 问 为 12 分钟 的 演讲 ， 那么 大约 要 准备 多少 字 的 演讲稿 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7079", "content": "一 本书 ， 第一天 看 了 12 页 ， 第 二 天 看 了 全书 的 40% ， 还 剩下 (1/3) ， 这 本书 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1870", "content": "一 个 平行四边形 的 面积 是 3.5 dm ^ 2 ， 底 是 1.4 dm ， 它 的 高 = 多少 dm ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13906", "content": "体育场 用 37.5 立方米 的 煤渣 铺 在 一条 长 100 米 、 宽 7.5 米 的 直 跑道 上 ． 煤渣 可以 铺 多 厚 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5529", "content": "a 数 与 b 数 的 比 是 4 ： 5 ， b 数 比 a 数多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9309", "content": "有 4 个 同学 见了面 ， 每 2 人 都 握 一次 手 ， 一共 握 了 多少 次 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17533", "content": "友谊 书店 有 600 本 故事书 ， 卖出 5 天 后 还 剩 150 本 ， 平均 每天 卖出 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13790", "content": "少年宫 乐队 有 18 名 女生 ， 16 名 男生 ， 合唱队 的 人数 是 乐队 的 4 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3635", "content": "一 个 因数 是 202 ， 另 一个 因数 是 11 ， 它们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22331", "content": "超市货架 上 有 一批 饼干 ， 卖出 (2/5) 后 ， 营业员 又 加进 了 12 包 ， 这时 货架 上 饼干 的 包 数 恰好 比 原来 的 80% ． 货架 上 原有 饼干 多少 包 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7350", "content": "果园 里 桃树 棵 数 是 梨树 棵 数 的 (3/5) ， 又 是 苹果树 的 (4/7) ， 梨树 有 120 棵 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13389", "content": "甲 、 乙 两车 同时 从 相距 396 千米 的 两地 出发 ， 相向 而 行 ． 甲 车 每 小时 行 64 千米 ， 途中 甲 车 因 故障 停车 修 了 0.5 小时 ， 然后 继续 行驶 ． 结果 乙 车 出发 4 小时 后 与 甲 车 相遇 ． 求 乙 车 的 速度 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12824", "content": "某 工厂 计划 4 月份 生产 机床 500 台 ， 实际 多 生产 80 台 ， 实际 完成 了 计划 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9534", "content": "某 一 品牌 电视机 每 台 售价 1500 元 ， 现在 降低 (1/10) 出售 ， 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4170", "content": "朝阳 小学 美术组 有 女 32 人 ， 女生 人数 是 男生 的 80% ． 美术组 有 男生 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7561", "content": "王 叔叔 开车 从 甲地 到 乙地 ， 前 2 小时 行 了 100 千米 ， 照 这样 的 速度 ， 从 甲地 到 乙地 一共 要 用 4 小时 ， 甲乙 两地 相距 多 远 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18659", "content": "小 明 在 一天 中 测量 了 6 次 气温 ， 分别 是 ： 18 ° c 、 21 ° c 、 27 ° c 、 28 ° c 、 24 ° c 、 20 ° c ． 这 一天 的 平均气温 = 多少 ° c ．", "knowledge": ["+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "480", "content": "小轿车 4.5 小时 行驶 了 325.8 千米 ， 平均 每 小时 行驶 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13193", "content": "码头 到货 1200 吨 ， 装卸队 原 计划 每 小时 卸货 120 吨 ， 但 接到 紧急通知 需要 提前 2 小时 卸完 ， 那么 该 装卸队 每 小时 应 卸货 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "857", "content": "运 一批 货物 ， 运走 的 与 剩下 的 比 为 3 ： 7 ， 如果 再 运走 30 吨 ， 那么 剩下 的 货物 只 占 原有 货物 的 (2/5) ， 这 批 货物 原有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18844", "content": "李师傅 加工 一批 零件 共用 了 15 小时 ， 平均 每 小时 加工 零件 48 个 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21158", "content": "小客车 限乘 14 人 ， 大客车 限乘 46 人 ， 如果 两种 车 各 开来 20 辆 ， 刚好 让 学校 的 学生 全部 坐下 ， 那么 这个 学校 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15830", "content": "鲜花店 平均 月 营业额 8000 元 ， 若 按 营业额 的 5% 缴纳 营业税 ， 该 鲜花店 平均 每月 需 缴纳 营业税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17351", "content": "在 一个 有 余数 的 除法 中 ， 如果 除数 是 99 ， 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15267", "content": "今年春节 ， 王 宁 得到 压岁钱 360 元 ， 比 李 华 的 压岁钱 少 25% ， 则 李 华 的 压岁钱 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6721", "content": "3 （ 一 ） 班 有 学生 55 人 ， 每人 至少 参加 赛跑 和 跳绳 比赛 中 的 一种 ． 已知 参加 赛跑 的 有 36 人 ， 参加 跳绳 的 人 有 38 人 ． 问 这两项 比赛 都 参加 的 有 几 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23087", "content": "王老师 家 买 了 一套 商品房 ， 总价 44 万元 ， 如果 一次 付清 房款 ， 可以 0.9 优惠 ． 王老师 一次 付清 房款 多少 元 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10098", "content": "小 兰 和 小 芳 同时 从 环形 跑道 上 的 一点 向 相反 方向 走 去 ， 小 兰 每 分 走 65 米 ， 小 芳 每 分 走 75 米 ， 经过 2.5 分 相遇 ． 这个 环形 跑道 全长 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6664", "content": "摆 3 个 ○ ， 摆 ☆ 的 个数 是 ○ 的 8 倍 多少 个 ☆ ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8683", "content": "830 - 2 个 15 相乘 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12651", "content": "修路 队 在 一条 公路 上 施工 ． 第一天 修 了 这 条 公路 的 (1/4) ， 第 二 天 修 了 余下 的 (2/3) ， 已知 这 两天 共 修路 1200 米 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5038", "content": "甲乙 二 人 绕 长 400 米 的 跑道 跑步 ， 两 人 从 同一 地点 背向 而 行 ， 则 经过 2 分钟 可 相遇 ； 如果 两 人 从 同一 地点 同 向 而 行 ， 经过 20 分钟 才 相遇 ， 且 已知 甲 的 速度 比 乙 的 速度 快 ， 那么 甲 的 速度 是 每分钟 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1552", "content": "一 个 底面 半径 2 cm ， 高 10 cm 的 圆柱 的 表面积 = 多少 平方厘米 ．", "knowledge": ["*", "+", "^"], "difficulty": 0.6, "length": 15}
-{"question_id": "6402", "content": "刘 艳 家 3 月份 节约 电费 32.56 元 ， 4 月份 比 3 月份 多 节约用电 15.09 元 ． 两个 月 共 节约用电 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12595", "content": "某 饭店 有 服务员 17 名 ， 如果 平均 每人 每月 工资 1855 元 ， 那么 该 饭店 老板 每月 共 要 支付 这些 服务员 多少 工资 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20930", "content": "李 村 小学 组织 同学 们 为 学校 图书馆 捐书 ， 四年级 有 203 人 ， 平均 每人 捐 3 本书 ， 五年级 有 230 人 ， 平均 每人 捐 4 本书 ， 五年级 比 四年级 多 捐 了 多少 本书 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17608", "content": "某 农场 去年 原 计划 造林 12 公顷 ， 实际 比 计划 多 造林 16% ． 去年 实际 造林 多少 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1724", "content": "一 套 住房面积 是 126 平方米 ， 客厅 面积 大约 占 住房 的 (1/6) ， 卧室 占 整套 住房 的 (2/7) ， 卧室 比 客厅 大 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5152", "content": "学校 图书馆 有 教科书 240 本 ， 连环画 是 教科书 的 (7/8) ， 两种 书 共有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "368", "content": "汽车 每 小时 行 80 千米 ， 是 火车 速度 的 (2/3) ， 火车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13808", "content": "把 100 克 的 药粉 放入 5000 克 的 水中 配成 一种 农药 ， 药粉 占 农药 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6409", "content": "某 居民小区 有 18 幢 楼房 ， 每 幢 楼 有 8 层 ， 每层 住 6 户 人家 ， 这个 小区 一共 可 住 多少 户 人家 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22376", "content": "要 在 学校 操场上 挖 一个 长 5 米 、 宽 3 米 、 深 0.6 米 的 沙坑 ， 每 立方米 沙 重 1.7 吨 ， 填满 这个 沙坑 需要 多少 吨 沙子 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "5613", "content": "小 明 现在 的 体重 是 36 千克 ， 比 去年 增加 了 (1/17) ． 去年 体重 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11628", "content": "8 - (4/9) / (1/3) 的 商 ， 所得 的 差 乘 (4/5) ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "212", "content": "慢车 每 小时 行驶 58 千米 ， 快车 每 小时 行驶 85 千米 ， 两车 相向 而 行 ， 经过 5 小时 相遇 ， 相遇 时 快车 比 慢车 多行 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21787", "content": "一 辆 卡车 运 一批 木材 ， 每次 运 105 根 ， 运 了 6 次 后 还 剩 70 根 ， 这 堆 木材 共有 几根 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15016", "content": "爸爸 买 了 3.9 千克 的 苹果 ， 如果 再 多 买 0.3 千克 就 相当于 妈妈 买 的 3 倍 ， 两 人 一共 买 了 多少 千克 的 苹果 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22167", "content": "有 两堆 水泥 ， 第一 堆 重 (5/8) 吨 ， 比 第 二 堆 轻 (1/4) 吨 ， 两堆 水泥 共 重 几吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22107", "content": "一 个 粮食 店 运 来 大米 840 千克 ， 是 运 来 面粉 重量 的 4 倍 ， 粮食 店 运 来 大米 和 面粉 一共 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21210", "content": "小 明 从 家 骑 自行车 去 学校 ， 每分钟 行 800 米 ， 4.5 分钟 到达 ， 放学 时 每分钟 行 600 米 ， 这样 要 几分钟 到 家 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23135", "content": "一 辆 客车 前 3 小时 行 105 千米 ， 后 2 小时 行 80 千米 ． 平均 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16105", "content": "一 种 消毒剂 ， 用 药液 和 水 按照 1 ： 50 配制 而 成 ． 如果 现在 要 配置 153 千克 的 消毒剂 ， 需要 药液 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "331", "content": "每盒 水彩笔 13 元 ， 每张 绘画 纸 4 元 ， 每块 画板 23 元 ． 张老师 带 的 钱 正好 可以 买 9 盒 水彩笔 和 1 块 画板 ． 这些 钱 如果 买 绘画 纸 ， 可以 买 多少 张 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14837", "content": "水蜜桃 味 的 水果糖 每粒 0.2 元 ， 买 4 粒 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13518", "content": "已知 小 红 有 240 张 邮票 ， 小 明 的 邮票 数 比 小 红 的 5 倍 多 10 张 ， 小 明 有 多少 张 邮票 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12381", "content": "小 明 要 用 100 元 买 一些 文具 ， 他 先 花 45 元 买 了 9 本 笔记本 ， 并 准备 用 剩下 的 钱 买 钢笔 ， 每支 钢笔 2.5 元 ． 小 明 可以 买 几支 钢笔 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2404", "content": "一 数 的 50% 与 它 (1/4) 相差 6 ， 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1366", "content": "6 福 鸡场 卖出 一批 肉鸡 ， 第一次 卖出 肉鸡 总数 的 40% ， 第 二 次 卖出 肉鸡 总数 的 (1/5) ， 还 剩 肉鸡 1200 只 ， 鸡场 有 肉鸡 共 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6321", "content": "妈妈 买 了 4 千克 苹果 ， 交给 售货员 30 元 ， 找回 4.8 元 ， 每千克 苹果 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3384", "content": "学校 要 在 校园内 栽 一批 树苗 ． 如果 这 批 树苗 的 成活率 为 80% ， 要 保证 成活 160 棵 树苗 ， 至少 要 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1041", "content": "乒乓球 兴趣小组 有 8 人 ， 如果 每 2 人 都 打 一场 比赛 ， 共 要 打 多少 场 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7524", "content": "一 批 水果 卖 了 70% ， 还 剩 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11999", "content": "水果店 运进 一批 雪梨 ， 第一天 卖出 了 (2/6) ， 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17006", "content": "把 2 克 盐溶 在 50 克 水中 ， 盐 占 盐水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2924", "content": "修 一条 公路 ， 总长 20 千米 ， 前 5 天 修 了 2.5 千米 ， 照 这样 计算 ， 修 完 这 条 路 还要 用 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8208", "content": "一 根 绳子 对折 后 ， 这时 它 的 长度 的 (1/2) 是 1 米 ， 这根 绳子 原来 长 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12983", "content": "两队 解放军 分别 从 相距 110 千米 的 a 、 b 两地 同时 相向 而 行 ， 经过 2 小时 相遇 ． a 队 每 小时 行 25 千米 ， b 队 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4924", "content": "如果 一个 数 的 (1/3) 比 它 的 (1/4) 大 5 ， 那么 这个 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1667", "content": "胜利 北路 修 公路 ， 前 5 天 共 修路 2854 米 ， 后 又 修 了 3 天 ， 每天 修 510 米 ， 一共 修路 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16286", "content": "解放军 某部 出动 80 辆 汽车 参加 工地 劳动 ， 在 途中 要 经过 一个 长 120 米 的 隧道 ． 如果 每辆 汽车 的 长 为 10 米 ， 相邻 两辆 汽车 相隔 20 米 ， 那么 ， 车队 以 每分钟 500 米 的 速度 通过 隧道 ， 需要 多少 分钟 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12661", "content": "学校 为 小朋友 定制 校服 ． 上衣 每件 42 元 ， 裤子 每 条 38 元 ， 要 定制 120 套 这样 的 校服 ， 需要 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20426", "content": "有 一堆 糖果 ， 其中 甲 糖果 占 总数 的 45% ， 再 放入 16 块 乙 糖果 后 ， 甲种 糖果 只 占 现在 总数 的 25% ， 问 这 堆 糖果 中 有 多块 甲种 糖果 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "5091", "content": "一 个 物体 在 月球 上 的 重量 只有 在 地球 上 的 (1/6) ， 在 地球 上 重 78 千克 的 宇航员 ， 在 月球 上 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12103", "content": "有 白 、 黑 、 红 、 黄 4 色 大小 一样 的 小球 各 4 个 ， 每次 至少 摸 出 多少 个 ， 才能 保证 有 2 个 相同 颜色 的 小球 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20506", "content": "用 边长 为 6 分 米 正方形 纸 剪成 一个 最大 的 圆 ， 剪 去 部分 的 面积 = 多少 分 米 ^ 2 ．", "knowledge": ["*", "-", "/", "^"], "difficulty": 0.4, "length": 11}
-{"question_id": "1867", "content": "泸 宁 高速公路 全长约 270 千米 ， 一辆 轿车 以 80 千米 / 时 的 速度 从 上海 开往 南京 ， 已经 行驶 了 1.5 小时 ， 还 需要 多少 小时 才能 到 南京 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22417", "content": "一 台 织布机 3 小时 织布 96.3 米 ， 照 这样 计算 ， 这样 的 5 台 织布机 织布 8 小时 ， 可以 织布 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15864", "content": "学校 图书室 买 回 了 20000 本 新 图书 ， 把 这些 新 图书 平均 摆放 在 25 个 新 书架上 ， 每个 书架 有 4 层 ， 平均 每层 摆放 多少 本 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "925", "content": "人民 炼铁厂 4 月份 计划 炼铁 1800 吨 ； 上旬 炼 了 原 计划 的 (2/5) ， 中旬 炼 了 原 计划 的 (9/20) ； 问 上 、 中旬 共 炼铁 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19179", "content": "平整 一块 土地 ， 原来 打算 每天 平整 0.6 公顷 ， 12 天 可以 完成 任务 ， 实际 每天 比 原 计划 多 平整 0.2 公顷 ， 实际 多少 天 可以 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8631", "content": "高速 磁悬浮列车 每 小时 可 行驶 500 千米 ， 6 小时 可 行驶 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10814", "content": "家电市场 进行 降价 酬宾 活动 ， 某 款 彩电 降价 (1/5) 后 ， 以 6480 元 出售 ． 该款 彩电 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7241", "content": "实验 小学 举行 捐赠 图书 活动 ． 五年级 同学 捐赠 380 本 ， 六年级 同学 捐赠 的 图书 比 五年级 多 5% ． 六年级 同学 捐赠 图书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20596", "content": "在 一个 小数 减法 算式 中 ， 差 是 51.3 ． 如果 被减数 增加 0.06 ， 减数 减少 4.21 ， 那么 现在 的 差 = ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21913", "content": "园林 工人 2 人 计划 用 15 天 的 时间 绿化 4000 平方米 的 地面 ， 实际 绿化 的 面积 超过 原来 的 (1/8) ， 实际 绿化 地面 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10136", "content": "同学 们 搬 砖 维修 花园 ， 五年级 有 243 人 ， 六年级 有 257 人 ， 平均 每人 搬 4 块砖 ． 他们 一共 搬 了 多少 块砖 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9954", "content": "春蕾 小学 组织 同学 们 进行 收集 树种 活动 ， 计划 20 天 收集 树种 120 千克 ， 实际 每天 比 计划 多 收集 1.5 千克 ， 收集 这 批 树种 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16620", "content": "修建 一 自来水厂 ， 计划 投资 500 万元 ， 实际 比 计划 节约 了 5% ， 实际 用 去 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12884", "content": "一 个数 的 (3/4) + (5/8) 的 和 是 1 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8524", "content": "有 两堆 苹果 ， 甲 堆 质量 的 (2/5) 和 乙 堆 的 (3/4) 一样 多 ． 甲 堆 有 45 千克 苹果 ， 乙 堆 有 多少 千克 苹果 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23083", "content": "120 的 (3/4) 比 它 的 (2/5) 多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11277", "content": "甲 城 到 乙 城 的 铁路 长 1157 千米 ， 比 甲 城 到 丙 城 的 距离 少 72 千米 ， 甲 城 到 丙 城 的 铁路 长 多少 千米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18265", "content": "一 筐 梨 重 45 千克 ， 上午 卖出 (3/5) ， 下午 卖出 剩下 的 (2/3) ， 还 剩 多少 千克 梨 没 卖 ？", "knowledge": ["*", "-"], "difficulty": 0.5, "length": 13}
-{"question_id": "9729", "content": "一 头 大象 每天 吃 180 千克 食物 ， 一只 熊猫 3 天 吃 108 千克 食物 ． 大象 每天 吃 的 食物 是 熊猫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15615", "content": "幸福村 村民 要 修 一条 水渠 ， 8 天 修 了 全长 的 (2/5) ． 照 这样 计算 ， 修 完 剩下 的 水渠 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2114", "content": "学校 印制 一批 画册 一 共用 了 1740 元 ， 其中 制版 费 300 元 ， 平均 每 本 画册 白白 印制 费用 是 3.6 元 ． 这 一批 画册 有 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3288", "content": "李 明 收集 邮票 40 枚 ， 王 红 收集 的 邮票 比 李 明 多 (2/5) ． 王 红 收集 邮票 多少 枚 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12562", "content": "汽车 (2/5) 小时 行 20 千米 ， 平均 每 小时 行 多少 千米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3766", "content": "百货大楼 出售 一种 彩色 电视机 ， 5 一 期间 降价 10% ， 每 台 售价 1980 元 ． 请 你 算 一 算 ， 这种 电视机 的 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3834", "content": "一 列 火车 和 一列 慢车 ， 同时 分别 从 甲乙 两地 相对 开出 ． 快车 每 小时 行 75 千米 ， 慢车 每 小时 行 65 千米 ， 相遇 时 快车 比 慢车 多行 了 40 千米 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18955", "content": "一 年 定期存款 的 年利率 是 4.14% ， 10000 元 的 存款 一年 以后 得到 利息 和 本金 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12016", "content": "全班 42 名 同学 把 写 有 自己 学 号 的 纸头 放进 一 盒子 内 ， 从中 抽 一张 纸头 能 抽取 恰 为 自己 学 号 的 可能性 的 大小 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11679", "content": "新学期 开学 ， 学校 运 来 20 箱 教科书 ， 每箱 有 12 包 ， 每包 有 35 本 ， 求 一共 运 来 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2882", "content": "实验 小学 的 学生 ， 五年级 比 四年级 多 (3/20) ， 四年级 比 三年级 多 (1/4) ， 而 五年级 学生 比 三年级 多 91 人 ， 三年级 有 学生 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9226", "content": "从 甲地 到 乙地 有 4 条 不同 的 路 ， 从 乙地 到 丙 地 有 6 条 不同 的 路 ． 那么 从 甲地 经 乙地 到 丙 地 共有 多少 不同 的 路 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11438", "content": "3 个 同学 在 跳绳 ， 王 红 跳 了 90 个 ， 是 小 明 的 (3/4) ， 小 东 跳 的 是 小 明 的 (5/8) ， 小 东 跳 了 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13473", "content": "有 一栋 居民楼 ， 每家 都 订 2 份 不同 的 报纸 ， 该 居民楼 共 订 了 3 种 报纸 ． 其中 《 南通 广播电视 报 》 34 份 ， 《 扬子晚报 》 30 份 ， 《 报刊 文摘 》 22 份 ． 那么 ， 订 《 扬子晚报 》 和 《 报刊 文摘 》 的 共有 多少 家 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11456", "content": "水果店 运 来 苹果 340 千克 ， 梨 260 千克 ， 运 来 苹果 和 梨 的 总重量 是 桔子 的 6 倍 ， 运 来 桔子 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15922", "content": "孵化场 用 一批 鸡蛋 孵化 出 285 只 小鸡 ， 孵化率 达到 95% ， 鸡蛋 有 多少 只 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13263", "content": "甲 车 每 小时 行 70 千米 ， 乙 车 比 甲 车 每 小时 多行 5 千米 ． 甲乙 两车 从 相距 480 千米 的 a 、 b 两地 同时 出发 ， 相向 而 行 ， 几小时 能够 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3970", "content": "实验 小学 美术组 人数 是 科技 组 的 (8/9) ， 科技 组 人数 是 体育组 的 (5/6) ． 美术组 有 40 人 ， 体育组 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18539", "content": "全校 有 517 名 学生 ， 其中 男生 268 人 ， 女生 有 多少 人 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22364", "content": "甲乙 两车 从 东西 两站 同时 相对 开出 ， 相遇 后 继续 行驶 ， 当 甲乙 两车 相距 29.4 千米 时 ， 甲 车行 了 全程 的 (3/5) ， 车行 了 全程 的 75% ． 东西 两站 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11383", "content": "我国 每年 约 产生 35 亿吨 的 工业 污水 ， 其中 只有 (3/10) 的 污水 经过 处理 ， 每年 没有 经过 处理 的 污水 大约 有 多少 亿吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11931", "content": "有 一盒 糖果 ， 共有 84 块 ， 第一次 吃 这 盒 的 (1/2) ， 第 二 次 吃 这 盒 的 (1/3) ， 两次 一共 吃 了 多少 块 糖 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "19983", "content": "春季 运动会 上 ， 六年级 少先队 为 同学 们 准备 了 10 千克 糖水 ， 其中 糖 和 水 的 比 是 1 ： 26 ， 因 天气炎热 需加 量 ， 先 补充 了 52 千克 水 ． 再 加多少 千克 糖 ， 才能 保持 原来 的 浓度 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18535", "content": "一 个 发电厂 原有 煤 3000 吨 ， 用 去 (5/6) ， 还 剩 多少 吨 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7298", "content": "一 张 桌子 是 152 元 ， 一把 椅子 是 42 元 ， 公司 买 了 25 套 桌椅 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11264", "content": "某班 共有 48 个 ， 采集 树种 3 小时 ， 其中 第一个 小组 7 人 共 采集 73.5 千克 ， 照 这样 计算 ， 全班 可 采集 树 多少 千克 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12414", "content": "例 1 ： 小 丽 和小红 两家 相距 910 米 ， 两 人 电话 相约 同时 从 家中 出发 向 对方 相向 行驶 ， 小 丽 每分钟 走 60 米 ， 小 红 每分钟 走 70 米 ， 几分钟 后 两 人 在 途中 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11498", "content": "一 块 底 面积 是 12 平方分米 ， 重 702 千克 的 钢材 ， 已知 每 立方分米 的 钢材 重 7.8 千克 ， 这块 钢材 长 多少 分 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9904", "content": "一 辆 汽车 用 (8/5) h 行 了 96 km ， 平均 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13637", "content": "如果 甲 数 的 (3/5) 和 乙 数 的 (3/8) 相等 ， 甲 数 是 40 ， 则 甲 数 比 乙 数 少 多少 % ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11640", "content": "一 堆 煤 重 2 吨 ， 用 去 了 (1/3) ， 还 剩下 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14751", "content": "(3/4) / 6 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21338", "content": "图书室 新 买来 200 本 科技 书 ， 新 买来 的 故事书 是 科技 书 的 5 倍 ， 两种 书 共有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16568", "content": "一 条 水渠 全长 5316 米 ． 已经 修 了 32 天 ， 还 剩 452 米 没 修 ， 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20905", "content": "食堂 运 来 白菜 60 千克 ， 运 来 的 黄瓜 是 白菜 的 (4/5) ． 食堂 运 来 的 白菜 和 黄瓜 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13071", "content": "操场上 原来 有 235 人 ， 又 来 了 5 个 小组 ， 每组 8 人 ， 现在 操场上 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15382", "content": "化妆品 公司 上 月 化妆 的 销售额 为 本 2000 万元 ， 如果 按 销售额 的 30% 缴纳 消费 消费税 ， 上 月 缴纳 消费税 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18896", "content": "400 - 64 ， 再 除以 8 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4854", "content": "一 个 水果店 有 苹果 480 千克 ， 橘子 是 苹果 的 3 倍 ． 这个 水果店 苹果 和 橘子 一共 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11884", "content": "一 桶 油 重 12 千克 ， 用 去 它 的 (3/4) ， 还 剩下 多少 千克 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9836", "content": "一 根 木头 长 20 米 ， 要 把 它 平均 分成 4 段 ． 每 锯下 一段 需 7 分钟 ， 锯 完 一共 要 用 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10058", "content": "12 吨 比 多少 少 25%", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5153", "content": "一 台 拖拉机 昨天上午 耕地 4800 平方米 ， 下午 耕地 的 面积 是 上午 的 (4/5) ． 这 台 拖拉机 昨天 一共 耕地 多少 平方米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18616", "content": "某 商店 进 了 一批 货 ， 其中 彩电 有 40 台 ． 进 的 录像机 台数 是 彩电 台数 的 (3/4) ， 恰好 又 是 dvd 机 台数 的 (2/3) ． 这个 商店 进 了 dvd 机 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6638", "content": "老人 活动中心 在 重阳节 时 组织 292 名 老人 去 游玩 ， 其中 250 名 老人 乘 5 部 大客车 ， 剩下 的 老人 乘 6 辆 小 面包车 ， 平均 每辆 小 面包车 坐 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20477", "content": "科技 小组 买来 一捆 电线 ， 用 去 28.6 米 ， 剩下 的 比 用 去 的 多 12.7 米 ． 这 捆 电线 原来 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18193", "content": "把 一根 木料 锯 成 3 段 要 6 分钟 ， 锯 成 8 段 要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22816", "content": "王大妈 收 了 (1/2) 吨 瓜 ， 第一天 卖出 (1/5) 吨 ， 第 二 天 卖出 (1/6) 吨 ， 还 剩 多少 吨 没 卖出 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7566", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 去 时 以 每 小时 66 千米 的 速度 行驶 了 4 小时 ， 返回 时 行驶 了 3 小时 ， 这辆 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18526", "content": "一 台 拖拉机 3 次 可 运 梨 240 筐 ， 一个 果园 要 运 7200 筐 梨 ， 用 5 台 这样 的 拖拉机 来 运 ， 几次 能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11173", "content": "a 、 b 两地 相距 648 千米 ， 甲乙 两 人 分别 从 两地 同时 相向 而 行 ， 甲 每 小时 行 80 千米 ， 甲 的 速度 是 乙 的 (4/5) ， 经过 几小时 两 人 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6222", "content": "白兔 比 黑 兔 少 4 只 ， 白兔 比 黑 兔 少 (1/5) ， 白兔 有 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8709", "content": "学校 有 女生 102 人 ， 男生 122 人 ， 做 广播体操 ， 如果 每 8 人 排成一列 ， 一共 可以 排成 多少 列 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17926", "content": "一 根 彩带 24 米 ， 每 4 米 一段 （ 每次 剪 单根 ） ， 一共 剪 多少 次 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17718", "content": "计算 （ 86 - 41 ） * 23 / 15 时 ， 要 先 算 多少 ， 再 算 多少 ， 最后 算 多少 ， 结果 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7351", "content": "师傅 加工 零件 100 个 ， 比 徒弟 加工 零件 个数 的 2 倍 少 8 个 ， 徒弟 加工 零件 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10194", "content": "小 勇 的 爸爸 把 8000 元 钱 存入 银行 ， 定期 2 年 ， 年利率 是 2.43% ， 利息税 是 20% ， 到期 后 ， 他 一共 可 取出 多少 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "9993", "content": "青少年 心跳 每分钟 约 75 次 ， 婴儿 每分钟 心跳 的 次数 比 青少年 多 (4/5) ， 婴儿 每分钟 心跳 多少 次 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21468", "content": "五年级 有 学生 110 人 ， 六年级 比 五年级 少 (1/10) ． 六年级 有 学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21977", "content": "工厂 运 来 一批 煤 ， 计划 每天 烧 1% ， 实际 每天 节约 20% ， 比 原 计划 每天 少 烧 30 千克 ， 实际 每天 烧 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "954", "content": "小 明 看 一本 240 页 的 书 ， 第一周 看 了 40% ， 第 二 周 看 了 全书 的 25% ． 两周 共 看 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16779", "content": "在 1000 米 的 直线 跑道 上 ， 间距 50 米 放 一个 障碍物 ， 那么 一共 要 放 多少 个 障碍物 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8477", "content": "一 辆 货车 ， 从 a 站 到 b 站 空车 行驶 每 小时 75 千米 ， 用 了 4 小时 ． 回来 时 装满 货物 按 原 路 返回 ， 用 了 6 小时 ， 返回 时 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4327", "content": "商店 运 来 桔子 、 苹果 、 梨 共 360 千克 ， 桔子 与 苹果 的 重量 比 是 5 ： 6 ， 梨 的 重量 是 苹果 的 (1/6) ， 桔子 有 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22381", "content": "百货商店 进 100 只 石英表 ， 后来 退还 厂家 5 只 ， 如果 每 售出 1 只 手表 的 零售价 120 元 ， 利润 相当于 售价 的 12% ， 那么 共 获得 利润 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9791", "content": "水果 批发部 有 苹果 350 千克 ， 梨 480 千克 ， 香蕉 比 苹果 和 梨 的 总 质量 少 260 千克 ． 水果 批发部 有 香蕉 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10067", "content": "妈妈 到 商场 买 了 一条 裤子 95 元 ， 一件 衬衣 48 元 ． 她 付给 收银员 150 元 ， 请 你 快速 心算 一下 应 找回 多少 元 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17028", "content": "张师傅 每 小时 做 18 个 零件 ， 王师傅 每 小时 做 20 个 零件 ， 两 人 同时 工作 ， 6 小时 后 完成 ， 这 批 零件 有 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14675", "content": "李 叔叔 上个月 工资 发 了 4000 元 ， 这个 月 发 了 4500 元 ， 这个 月 比 上个月 多发 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10037", "content": "幸福村 农民 去年 人均收入 2150 元 ， 今年 比 去年 增加 了 (1/10) ， 今年 人均收入 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17766", "content": "小 明 和小红 在 校门口 分手 ， 两 人 背向 而 行 ． 8 分钟 后 他们 同时 到 家 ． 小 明 和小红 家 相距 560 米 ， 小 明 平均 每分钟 走 42 米 ， 小 红 平均 每分钟 走 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4795", "content": "新兴 玩具厂 计划 生产 1200 只 小 猴 ， 15 天 完成 任务 ， 结果 12 天 就 完成 了 任务 ， 实际 每天 比 计划 每天 多 生产 多少 只 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13465", "content": "学校食堂 买来 西红柿 38.25 千克 ， 黄瓜 21.08 千克 ， 买来 的 芹菜 比 西红柿 和 黄瓜 的 总和 少 4.35 千克 ， 买来 芹菜 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12412", "content": "装订 小组 用纸 装订 练习本 ， 一本 练习本 40 张 ， 装订 了 75 本 后 ， 还 剩 32 张 纸 ， 原来 有 多少 张 纸 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10968", "content": "一 个 平行四边形 的 面积 是 7.2 平方分米 ， 高 是 30 分 米 ， 则 底 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14749", "content": "苹果 有 80 kg ， 梨 比 苹果 多 25% ， 梨 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22451", "content": "一 辆 汽车 从 甲 城 开往 乙 城 ， 6 小时 行驶 了 300 千米 ， 这时 距 乙 城 还有 220 千米 ， 如果 速度 不变 ， 到达 乙 城 时 共 行驶 了 多少 小时 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "993", "content": "石料厂 运 来 一批 石料 ， 用 去 25.3 吨 ， 剩下 的 是 用 去 的 2.5 倍 ． 这 批 石料 一共 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3350", "content": "杨树 有 24 棵 ， 柳树 的 棵 数 是 杨树 的 4 倍 ， 柳树 有 多少 棵 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12406", "content": "240 的 (1/3) - 32 与 25 的 和 ， 差 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21357", "content": "某 数 的 正好 是 3 的 40% ， 这个 数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5189", "content": "养猪 专业户 王 爷爷 买 12 只 小猪 用 去 900 元 ， 他 还 想 再 买 8 只 同样 的 小猪 ， 还 需要 准备 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5691", "content": "某 车间 有 女工 155 人 ， 女工 人数 比 男工 的 3 倍 还 多 8 人 ， 男工 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20790", "content": "修路 队 要 修 一条 公路 ， 前 3 天 共 修 了 425 米 ， 接下来 的 2 天 分别 修 了 120 米 、 130 米 ． 平均 每天 修 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12295", "content": "压路机 的 滚筒 是 圆柱形 ， 它 的 长 是 1.5 米 ， 横截面 直径 是 1.2 米 ， 如果 每分钟 转动 10 圈 ， 那么 每分钟 可 压 路面 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "11717", "content": "大小 两个 齿轮 的 齿 数 比 是 4 ： 3 ， 大 齿轮 有 32 个 齿 ， 小齿轮 有 多少 个 齿 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22558", "content": "一 桶 油 连 桶 共 重 10 千克 ， 如果 卖 去 (2/3) ， 则 连 桶 共 重 4 千克 ． 油 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15865", "content": "列式 计算 ： 比 1.2 的 4 倍 多 2.4 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14923", "content": "两个 游泳队 同时 从 相距 2040 米 的 a 、 b 两地 相向 出发 ， 甲队 从 a 地下水 ， 每分钟 游 40 米 ， 乙 队 从 b 地下水 ， 每分钟 游 45 米 ， 一只 汽船 负责 两队 的 安全 ， 同时 从 b 地 出发 ， 每分钟 行使 1200 米 ， 遇到 甲队 就 立即 返回 ， 返回 遇到 乙 队 又 向 甲队 开出 ， 这样 不断 的 往返 下去 ， 汽艇 行使 了 多少 米 两队 才能 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21343", "content": "一 列 火车 (5/12) 小时 行驶 25 千米 ， 用 这样 的 速度 从 甲地 开往 乙地 行 了 (25/6) 小时 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13994", "content": "把 一根 长 8 千米 的 绳子 平均 剪 4 次 ， 每 段长 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9905", "content": "一 捆 电线 用 去 76 米 ， 剩下 的 比 用 去 的 3 倍 少 16 米 ， 这 捆 电线 原来 有 多长 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9446", "content": "南 栅 小学 五年级 同学 植树 45 棵 ， 四年级 同学 植树 的 棵 数 比 五年级 的 2 倍 少 18 棵 ， 四年级 同学 植树 多少 棵 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15480", "content": "修 一条 公路 ， 已修 的 比 全长 的 (3/8) 多 6 千米 ， 还 剩 24 千米 没 修 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9273", "content": "某 工厂 去年 产值 800 万元 ， 今年 产值 比 去年 增加 (1/10) ， 今年 产值 多少 万元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21728", "content": "小 明 体重 是 35 千克 ， 是 爸爸 体重 的 (7/15) ， 爸爸 体重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2492", "content": "一 个数 除以 15 ， 商 是 45 、 余数 是 2 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9871", "content": "乐乐 水果店 运 来 橘子 485 千克 ， 是 运 来 香蕉 重量 的 5 倍 ． 香蕉 和 橘子 一共 运 来 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11224", "content": "小 明 家 去年 用水 40 吨 ， 今年 比 去年 节约 了 4 吨 ， 节约 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8594", "content": "甲 、 乙 两地 相距 540 千米 ， 一辆 汽车 从 甲地 开往 乙地 ， 每 小时 行 48 千米 ； 另 一辆 汽车 从 乙地 开往 甲地 ， 每 小时 行 32 千米 ． 两车 从 两地 同时 相对 开出 5 小时 后 ， 还 相距 多少 千米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "363", "content": "扬州 日报 小 记者 假期 到 凤凰 岛 采风 ， 汽车 从 学校 出发 ， 每 小时 行 48 千米 ， (1/2) 小时 行 了 全程 的 (3/4) ， 照 这样 计算 ， 还要 多少 时间 才能 行 完全 程 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15507", "content": "计算 ： 12 + 34 * 56 + 96 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9240", "content": "二年级 男生 占 女生 的 (8/7) ， 那么 男生 比 女生 多 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "15303", "content": "一 个 长方体 的 金鱼缸 ， 长 是 12 分 米 ， 宽 是 6 分 米 ， 高 是 8 分 米 ， 不 小心 前面 的 玻璃 被 打坏 了 ， 修理 时 配 上 的 玻璃 的 面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1231", "content": "一 个 因数 是 9 ， 另 一个 因数 是 7 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9275", "content": "商店 运 来 112 箱 香皂 ， 每箱 25 块 ， 每块 卖 4 元 ， 这些 香皂 一共 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17082", "content": "学校 买来 一批 少儿读物 ， 发给 31 个 班 的 同学 ， 每班 发 50 本 ， 还 剩 135 本 ． 学校 一共 买来 多少 本 少儿读物 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11144", "content": "王师傅 加工 一批 零件 ， (2/5) 小时 完成 了 工作量 的 (2/3) ． 照 这样 计算 ， 王师傅 完成 全部 任务 ， 一共 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6374", "content": "31 个 9 连 加 的 和 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1544", "content": "小 敏 看 一 本书 ， 前 3 天 看 了 24 页 ， 照 这样 计算 ， 看 完 这本 120 页 的 书 ， 一共 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15477", "content": "287 * 3 的 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8408", "content": "一 根 铁丝 长 30 米 ， 截去 (1/6) 后 ， 它 还 剩 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21501", "content": "一 架 民航 飞机 的 速度 是 每 小时 600 千米 ， 相当于 一架 斗 机 速度 的 (2/3) ． 战斗机 的 速度 = 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19367", "content": "长 6.28 米 的 绳子 ， 正好 绕 树干 10 圈 ． 树干 横截面 的 直径 大约 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6432", "content": "王师傅 和 他 的 3 个 徒弟 一起 加工 零件 ， 8 小时 共 加工 了 768 个 零件 ， 平均 每人 每 小时 加工 多少 个 零件 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3468", "content": "小 丽 读 一 本书 ， 计划 每天 读 全书 的 (2/7) ， 读 了 3 天 后 ， 还 剩 280 页 没有 读 ， 这 本书 共有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2778", "content": "平坝村 去年 种 西瓜 150 公顷 ， 今年 比 去年 多种 (1/3) ， 今年 种瓜 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15980", "content": "小 明 从 家 到 学校 要 行 24 分钟 ， 他 的 速度 大约 是 60 米 / 分 ， 小 明 家 到 学校 大约 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15201", "content": "某 车间 要 加工 500 个 零件 ， 已经 加工 了 10 天 ， 每天 加工 30 个 ， 剩下 的 要 在 5 天 内 完成 ， 每天 应 加工 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12313", "content": "体育 室 有 45 副 羽毛球拍 ， 乒乓球拍 比 羽毛球拍 多 (4/9) ， 乒乓球拍 有 多少 副 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22140", "content": "把 100 元 钱 按 一年期 存入 银行 ， 年利率 是 1.98% ， 同时 银行 代收 20% 的 利息税 ， 到期 后 可 从 银行 取得 本息 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "7704", "content": "电视机厂 要 生产 120 台 电视机 ， 已经 生产 了 6 天 ， 还 差 30 台 ， 平均 每天 生产 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5506", "content": "一 只 西瓜 的 重量 等于 2 千克 加上 半个 西瓜 的 重量 ， 这个 西瓜 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16362", "content": "一 些 乒乓球 ， 如果 每盒 装 6 个 ， 可以 装 36 盒 ． 如果 每盒 装 4 个 ， 可以 装 几盒 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15304", "content": "一 个 果园 有 苹果树 250 棵 ， 梨树 占 所有 果树 的 (1/3) ， 这 两种 果树 正好 是 果园 果树 的 (3/8) ， 这个 果园 一共 有 果树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3782", "content": "一 本 91 页 的 科技 书 ， 小 明 看 了 80 页 ， 看过 的 页数 占 这 本书 总 页数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10818", "content": "地球 上 现存 的 鸟类 有 9621 种 ， 已经 消亡 的 鸟类 比 现存 鸟类 的 10 倍 还 多 769 种 ， 已经 消亡 的 鸟类 有 多少 种 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13820", "content": "一 个 工厂 原来 造 一台 机器 要 用 144 小时 ， 改进 技术 后 ， 只用 96 小时 就 可以 生产 一台 ． 原来 造 6 台 机器 的 时间 ， 现在 可以 造 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2284", "content": "一 个 饮料瓶 能 装 (7/10) 升 的 橙汁 ， 小 明 一次 喝 了 这 瓶 橙汁 的 (5/14) ， 小 明 一次 喝 了 多少 升 橙汁 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10665", "content": "东方 小学 二年级 有 男生 128 人 ， 有 女生 134 人 ， 二年级 学生 比 一年级 多 17 人 ， 一年级 有 学生 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20881", "content": "学校 图书室 原有 故事书 2350 本 ， 现在 又 买来 了 280 本 ， 并 借出 了 1348 本 ． 现在 图书室 有 故事书 多少 本 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10861", "content": "一 套 服装 先 涨价 20% ， 后来 又 打 0.8 ， 现在 卖 480 元 ， 这 套 服装 原价 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17083", "content": "从 甲地 到 乙地 的 路程 是 186.83 千米 ， 王 亮 骑 自行车 从 甲地 出发 ， 4 小时 行 了 47.6 千米 ． 按 这样 的 速度 ， 他 还要 几小时 才能 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17814", "content": "王老师 带 了 386 元 钱 ， 买 足球 用 去 了 130 元 ， 剩下 的 钱 又 买 了 8 个 篮球 ， 平均 每个 篮球 多少 元 ？ （ 用 综合 算式 来 解答 ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10829", "content": "一 条 绳子 ， 剪 去 全长 的 (4/5) ， 还 剩下 3 米 ， 这 条 绳子 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9523", "content": "学校 科技 组 有 36 名 同学 ， 美术组 有 26 名 ， 书法 组 的 人数 是 美术组 的 3 倍 ． 书法 组 的 人数 比 科技 组 多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "664", "content": "一 个 正方形 的 边长 是 10 厘米 ， 如果 边长 减少 4 厘米 ， 则 它 的 面积 减少 多少 平方厘米 ．", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "20442", "content": "两位 同学 参加 一 次 应用题 比赛 ， 李 军 已 做 了 12 题 ， 占 总 题 数 的 (2/3) ， 王英 已 做 了 总 题 数 的 (5/6) ， 王英 做 了 几道 题 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18320", "content": "爸爸 将 20000 元 存入 银行 ， 定期 一年 ， 年利率 是 3.06% ． 准备 到期 后 把 税后 利息 捐给 “ 希望工程 ” ． 利息税 是 20% ， 爸爸 能 捐款 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "1362", "content": "某 公共汽车 线路 中间 有 10 个 站 ． 车 有 快车 及 慢车 两种 ， 快车 车速 是 慢车 车速 的 1.2 倍 ． 慢车 每 站 都 停 ， 快车 则 只 停 中间 一个 站 ， 每 站 停留时间 都 是 3 分钟 ． 当 某次 慢车 发出 40 分钟 后 ， 快车 从 同一 始发站 开出 ， 两车 恰好 同时 到达 终点 ． 问 快车 从 起点 到 终点 共用 多少 时间 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "8587", "content": "某 农场 开垦 一块 菜地 ， 第一周 开垦 了 (2/3) 公顷 ， 比 第 二 周 多 开垦 了 (5/8) 公顷 ， 两周 一共 开垦 了 多少 公顷 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1159", "content": "5 架 玩具 飞机 共 值 1560 元 ， 平均 每 架 玩具 飞机 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "174", "content": "320 - 168 / 6 的 商 ， 所得 的 差 乘以 18 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14936", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行驶 了 全程 的 (3/8) ， 正好 是 102 千米 ． 问 此时 该车 距 乙地 还有 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12156", "content": "一 瓶 花生油 36 元 ， 是 一瓶 调和油 价格 的 (6/7) ． 一瓶 调和油 的 价格 = 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9325", "content": "16 + （ 14 - 9 ） / 0.5 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7278", "content": "水果店 有 梨子 387 千克 ， 卖出 205 千克 后 ， 又 运 来 一批 ， 现在 水果店 共有 梨子 945 千克 ． 水果店 又 运 来 梨子 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16299", "content": "16 的 (3/4) 相当于 36 的 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2099", "content": "某 商店 有 一种 衣服 ， 打 0.95 后 售价 是 142.5 元 ， 这种 衣服 原价 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1752", "content": "某班 统计 语文 期末考试 成绩 ， 班 平均分 85.13 分 ， 经 复查 张 小 敏 的 成绩 87 误 为 78 分 ， 重审 后 平均 分为 85.31 分 ， 问 这个 班 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14387", "content": "运 一堆 煤 ， 已经 运 了 (2/5) ， 还 剩下 360 吨 ． 这 堆 煤 原有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4509", "content": "有 一捆 铁丝 ， 第一次 用 去 它 的 (2/5) ， 第 二 次 用 去 它 的 (1/3) ， 第 3 次 用 去 40 米 ， 正好 用 完 ， 这 捆 铁丝 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21300", "content": "运 一堆 煤 ， 第一次 运走 (5/6) 吨 ， 第 二 次 运走 (8/9) 吨 ， 还 剩 (3/4) 吨 ， 这 堆 煤 原有 多少 吨 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19616", "content": "小学 有 男生 420 人 ， 男生 比 女生 多   (1/5) ， 女生 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8209", "content": "小 军 的 妈妈 一个月 的 工资 是 2400 元 ， 按 国家有关 规定 ， 扣除 1500 元 后 ， 把 余额 的 (1/5) 作为 个人 所 缴纳 的 税 ， 这样 小 军 妈妈 一个月 实际 获得 多少 元 的 工资 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "22779", "content": "修路 队 要 修 一条 长 500 千米 的 公路 ， 已经 修 了 40% ， 还 剩 多少 千米 没有 修 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13165", "content": "小 明 看 一本 120 页 的 科普 书 ， 先 看 了 (2/5) ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6730", "content": "某 厂 今年 计划 完成 产值 600 万元 ， 实际 完成 产值 720 万元 ， 实际 比 计划 超产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11300", "content": "一 根 竹笋 ， 从 发芽 到 长大 ， 如果 每天 长 高 1 倍 ， 经过 8 天长 到 24 dm ， 那么 长 到 3 dm 时 ， 经过 了 多少 天 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7799", "content": "东方 小学 新建 教学大楼 ， 实际 造价 45 万元 ， 比 原 计划 节约 了 (1/10) ． 原 计划 造价 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12158", "content": "王师傅 每 时 加工 15 个 零件 ， 赵师傅 每 时 加工 12 个 零件 ． 两位 师傅 共同 加工 (2/3) 时 ， 共 加工 多少 个 零件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13205", "content": "体育老师 买 了 8 只 乒乓球拍 ， 付出 100 元 ， 营业员 找 给 他 4 元 ． 请 你 帮 他 算 一 算 ， 每 只 球拍 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10997", "content": "从 甲 城 到 乙 城 铁路 长 468 千米 ， 以前 快车 要 行 5.2 小时 ， 现在 只要 行 3.9 小时 ， 现在 比 过去 平均 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16576", "content": "做 一种 布 艺 娃娃 ， 原来 每个 需要 0.8 m 布 ， 后来 改进 了 制作方法 ， 每个 节省 0.2 m 布 ， 原来 做 240 个 布 艺 娃娃 的 布 ， 现在 可 做 多少 个 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5206", "content": "小 明 3 天 看 了 全书 的 (9/10) ， 求 平均 每天 看 了 全书 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13951", "content": "桌子 上 有 96 个 苹果 ， 每次 拿走 4 个 ， 拿 多少 次 后 还 剩下 76 个 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12046", "content": "一 辆 摩托车 从 甲地 开往 乙地 ， 已 行 了 全程 的 (4/7) ， 离 乙地 还有 42 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4703", "content": "商店 有 5 盒 手电筒 ， 每盒 有 12 个 ， 每个 手电筒 卖 6 元 ， 这些 手电筒 一共 可以 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9095", "content": "一 张 课桌 的 价格 是 100 元 ， 椅子 的 价格 是 课桌 的 (2/5) ． 一套 课桌椅 的 价格 = 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3795", "content": "纳税 是 每个 公民 应 尽 的 义务 ． 做 服装 生意 的 王 叔叔 上 月 营业额 是 6000 元 ， 如果 按 5% 的 税率 缴纳 营业税 ， 王 叔叔 上 月 应 缴 营业税 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3676", "content": "李 大爷 带 600 元 钱 买 化肥 ， 买 了 36 袋 化肥 后 还 剩下 60 元 钱 ， 每 袋 化肥 多少 元 钱 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2630", "content": "要 维修 一段 长 387.8 米 的 路 ， 已经 修 了 8 天 ， 平均 每天 修 25 米 ． 剩下 的 6 天 修 完 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6577", "content": "一 根 钢筋 ， 第一次 截去 (3/4) 米 ， 还 剩 (4/5) 米 ， 这根 钢筋 的 全长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3617", "content": "陈老师 去 体育 用品店 买 了 12 个 篮球 ， 每个 篮球 的 价钱 是 63 元 ， 又 买 了 8 个 排球 用 去 240 元 ， ． 陈老师 一 共用 了 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2676", "content": "一 块 长方形 菜地 ， 长 是 9 米 ， 宽 是 6 米 ． 这块 菜地 一共 收 青菜 972 千克 ． 平均 每平方米 收 青菜 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5912", "content": "北京 时间 7 月 29 日 ， 2012 伦敦 奥运会 女子 10 米 气手枪 决赛 ． 中国 选手 郭 文 珺 以 总成绩 488.1 环 夺冠 ， 法国 选手 席 琳 • 格 贝维勒 以 总成绩 486.6 环 夺得 银牌 ． 郭 文 瑶 比 法国 选手 席 琳 • 格 贝维勒 高出 多少 环 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "19975", "content": "两 数 相 乘积 是 180 ， 其中 一个 因数 不变 ， 另 一个 因数 乘 3 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8129", "content": "丰林 村 栽种 了 一批 树苗 ， 已知 这 批 树苗 的 成活率 在 70% ～ 80% 之间 ． 如果 要 保证 有 4200 棵 树苗 成活 ， 需要 种 多少 棵 树苗 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7486", "content": "一 个 烙饼 锅 最 多 只能 放 2 张 饼 ， 一张 饼 烙 一面 需 3 分钟 ， 妈妈 要 烙 8 个 饼 ， 两面 都 要 烙 ， 至少 要 几分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13735", "content": "把 一根 绳子 按 3 ： 2 截 成 甲 、 乙 两段 ， 已知 甲 段长 4.8 米 ， 乙 段长 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9654", "content": "一 座 大桥 长 2500 米 ， 一列 火车 通过 大桥 时 每分钟 行 960 米 ， 从 火车 车头 开 上 桥 到 车尾 离开 桥 共 需 3 分钟 ． 这 列 火车 车身 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3388", "content": "一 种 小麦 的 出粉率 是 70% ， 麦皮 与 杂质 为 180 千克 ， 这 批 小麦 出 粉 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11794", "content": "三年级 学生 去 郊游 ， 其中 男生 125 人 ， 女生 118 人 ． 学校 包 了 9 辆 大巴车 ， 平均 每辆车 坐 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "547", "content": "王老师 买 了 新房子 ， 装修 用 了 10.4 万元 ， 比 计划 节约 了 20% ． 王老师 原 计划 用于 装修 的 费用 = 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11360", "content": "一 个 三角形 的 底 是 1.2 dm ， 高 是 0.6 dm ， 与 它 等 底 等 高 的 平行四边形 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "23123", "content": "商店 进 了 一批 新款 玩具 ， 第一天 卖出 的 数量 比 总数 的 (2/5) 少 9 个 ， 还 剩 33 个 没 卖出 ． 这 批 玩具 共有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "404", "content": "一 个 建筑工地 ， 第一天 运 来 水泥 565 袋 ， 比 第 二 天运 来 的 多 128 袋 ， 这 两天 一共 运 来 多少 袋 水泥 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2532", "content": "出租车 起步价 是 5 元 ， 2 千米 以后 按 每 千米 1.2 元 计费 ， 王老师 要 乘 出租车 去 8 千米 处 的 机场 接 朋友 ， 王老师 应付 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17541", "content": "笑笑 看 一本 故事书 共 170 页 ， 她 已经 看 了 90 页 ． 剩下 的 页数 ， 她 要 在 4 天 内 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8422", "content": "面包房 制作 面包 时 ， 规定 每 400 克 面粉 要 加入 5 只 鸡蛋 ． 现有 面粉 6800 克 ， 需要 加入 鸡蛋 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13979", "content": "妈妈 买 了 4 卷 胶卷 ， 每 卷 可以 拍 36 张 ， 去 春游 时 拍掉 了 118 张 ， 还有 几张 可以 拍 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8203", "content": "筑路 队 修 一条 公路 ， 第一天 修 了 全长 的 (1/5) 又 100 米 ， 第 二 天 又 修 了 余下 的 (2/7) ， 这时 还 剩下 500 米 路 没有 修 ． 问 ： 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "13837", "content": "同学 们 要 做 120 朵花 ， 每人 做 5 朵 ， 每个 小组 有 12 人 ， 要 几组 同学 来 做 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18316", "content": "某 汽车 制造厂 去年 生产 汽车 30000 辆 ， 今年 比 去年 增产 (3/5) ， 今年 增产 汽车 多少 俩 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22280", "content": "红光 村 有 村民 1280 人 ， 幸福村 的 村民 比 红光 村 少 25% ， 向阳 村 的 村民 是 幸福村 的 80% ， 向阳 村 有 村民 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13743", "content": "一 种 电视机 ， 现价 每 台 2400 元 ， 比 原价 降低 了 600 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2333", "content": "水果店 运进 200 千克 苹果 ， 上午 卖出 总数 的 (1/4) ， 下午 又 卖出 总数 的 (1/5) ， ， 这 一天 一共 卖出 多少 千克 的 苹果 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21835", "content": "一 个 平行四边形 ， 两条 邻边 的 长 分别 是 4 厘米 和 8 厘米 ， 其中 一边 上 的 高 为 5 厘米 ， 这个 平行四边形 的 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19460", "content": "同学 们 要 在 长 150 米 的 路 的 一边 种 一排 树 ， 如果 每隔 5 米 种 一棵树 ， 那么 一共 要 种 多少 棵 树 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12480", "content": "小 文 和小红 进行 投篮 比赛 ， 小 文 投中 6 个 ， 小 红 投中 5 个 ． 小 文 投中 的 个数 比 小 红 多几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "744", "content": "粮站 有 2800 千克 大米 和 1200 千克 面粉 ， 又 运 来 80 袋 大米 ， 每 袋 50 千克 ， 现在 一共 有 大米 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1838", "content": "王师傅 5 分钟 加工 4 个 零件 ， 平均 每 加工 一个 零件 要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9589", "content": "一 个 班里 ， 男生 占 女生 的 (4/5) ， 女生 是 15 人 ， 男生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5175", "content": "昨天 ， 果园 共 摘下 了 150 筐 苹果 ， 每 筐 苹果 重 48 千克 ． 昨天 一共 摘下 了 多少 千克 苹果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4263", "content": "6 千克 苹果 的 价钱 相当于 8 千克 橘子 的 价钱 ， 每千克 苹果 4 元 ， 每千克 橘子 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1807", "content": "红球 和 绿 球 若干 ， 如果 在 布袋中 放入 一些 球 ， 要求 摸 到 红球 的 可能性 是 (3/8) ， 已知 放 了 15 个 红球 ， 放 了 多少 个 绿 球 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22256", "content": "一 菜店 购 来 梨 344 千克 ， 比 西瓜 的 4.5 倍 少 16 千克 ， 购 来 西瓜 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19799", "content": "一 根 长方体 木料 ， 长 6 米 ， 横截面 积 是 0.4 平方米 ， 已知 每 立方米 的 木 重 0.6 吨 ． 这根 木料 有 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "25", "content": "商店 里 有 梨 390 千克 ， 比 苹果 少 40% ， 商店 里 有 苹果 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19109", "content": "“ 海西 号 ” 列车 从 龙岩 站 出发 时 载有 乘客 813 人 ， 到 长汀 站 下车 了 89 人 ， 又 上车 237 人 ． 这时 火车 上 有 乘客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11707", "content": "一 件 商品 的 进价 加上 40 元 是 售价 ， 一位 顾客 买 这种 商品 打 0.8 ， 商场 还 赚 12 元 ， 则 这件 商品 的 进价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9482", "content": "一 道 减法 算式 中 的 减数 和 差 都 是 132 ， 被减数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4461", "content": "学校 组织 同学 们 去 游泳 ， 女生 去 369 人 ， 男生 去 381 人 ， 把 他们 平均 分成 30 个 小组 ， 每个 小组 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6675", "content": "在 一个 比例 里 ， 两个 外 项 分别 是 35 和 37 ， 一个 内 项 是 45 ， 另 一个 内 项 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10253", "content": "水泥厂 日产量 由 原来 的 300 吨 增加 到 了 400 吨 ， 增加 了 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12690", "content": "把 一个 底面 为 正方形 且 边长 是 3 dm 、 高 是 5 dm 的 长方体 石料 凿 去 一部分 ， 尽量 加工 为 体积 最大 的 正方体 ， 那么 凿 去 的 石料 体积 = 多少 立方分米 ？", "knowledge": ["*", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "17649", "content": "挖 一条 1800 米 长 的 水沟 ， 甲 、 乙 两队 分别 同时 从 两端 相向 开挖 ， 经过 (24/5) 小时 挖通 ． 已知 甲队 与 乙 队 的 工作效率 比 是 3 ： 2 ， 甲队 挖 完 这 条 水沟 需要 多少 小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10325", "content": "爸爸 今年 36 岁 ， 正好 是 小 华 年龄 的 4 倍 ． 小 华 今年 多少岁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1029", "content": "三年级 3 个 班上 学期 卖 废纸 和 矿泉水瓶 一共 收入 540 元 ， 平均 每个 班 收入 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11847", "content": "一 块 长方形 水稻田 ， 宽 是 50 米 ， 长 比 宽 的 2 倍 少 20 米 ， 这块 水稻 地 的 面积 = 多少 平方米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2435", "content": "甲 、 乙 两艘 轮船 同时 从 两个 港口 相对 开出 ． 已知 甲 船 每 小时 行 36.5 千米 ， 乙 船 每 小时 行 43.2 千米 ， 经过 8 小时 两 船 相遇 ． 问 ： 这 两个 港口 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21598", "content": "电视机 原价 990 元 ， 现价 880 元 ， 现在 买 电视机 比 原来 便宜 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6115", "content": "学校 体育组 有 36 人 ， 美术组 人数 比 体育组 人数 的 2 倍 少 12 人 ． 学校 美术组 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8428", "content": "每 上 一层楼 要 走 16 个 台阶 ， 齐齐 走 到 家里 一共 有 64 个 台阶 ， 齐齐 家住 几楼 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18212", "content": "前进 小学 学生 参加 植树 ， 六年级 植树 96 棵 ， 是 五年级 植树 棵 数 的 (6/5) ， 两个 年级 共 植树 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17390", "content": "阳阳 正在 读 一本 科普 书 ， 第一周 读 了 88 页 ， 第 二 周 读 了 (1/5) ， 还 剩下 这 本书 的 (1/4) 没有 读 ， 这本 科普 书 一共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11522", "content": "小 明 的 身高 是 135 cm ， 小 华 的 身高 比 小 明 身高 的 (8/9) 还 矮 2 cm ． 小 华 身高 多少 厘米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16950", "content": "一 个 袋子 中 有 10 只 红袜子 、 8 只 蓝 袜子 、 6 只 绿 袜子 和 4 只 白袜子 ， 闭 着 眼睛 从 袋子 中 摸 袜子 ， 每次 只许 摸 一只 ， 至少 要 摸 多少 只 才能 保证 摸 出 的 这 几只 袜子 中 至少 有 一双 颜色 一样 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22636", "content": "水果店 运 来 菠萝 、 苹果 和 橘子 ． 菠萝 有 100 千克 ， 比 苹果 少 24 千克 ， 橘子 的 重量 是 苹果 的 2 倍 ， 橘子 有 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14545", "content": "一 个 工程队 前 12 天 修路 1800 米 ， 照 这样 的 速度 还 需 8 天 就 可以 完成 任务 ， 这 条 路 有 多长 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12206", "content": "立 华 小学 买 白粉笔 175 盒 ， 比 彩色 粉笔 多 26 盒 ， 一共 买 了 多少 盒 粉笔 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "914", "content": "我国 13 亿 人口 中 城市 人口 约 占 40% ， 一般 发达国家 这 一 比例 约 为 70% ． 要 达到 一般 发达国家 的 水平 ， 我国 城市 人口 还要 增加 多少 亿 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16514", "content": "一 匹 马 运 了 256 千克 货物 ， 一匹 骆驼 运 的 货物 是 这 匹 马 的 2 倍 ， 它 俩 一共 运 了 多少 千克 货物 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6146", "content": "小 明 3 分钟 行 225 米 ， 照 这样 计算 ， 再行 2 分钟 ， 共 行 多少 米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16656", "content": "一 根 钢筋 ， 第一次 截去 (7/8) 米 ， 比 第 二 次 多截 去 (3/10) 米 ， 还 剩 (4/5) 米 ， 这根 钢筋 的 全长 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4206", "content": "盘子 里 有 一些 糖 ， 小 红 吃 了 (1/3) 后 ， 还 剩下 10 块 ． 这个 盘子 里 原来 有 多少 块 糖 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13382", "content": "甲 数 是 6 ， 乙 数 是 甲 数 的 7 倍 ， 乙 数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3538", "content": "某 乡镇 5 、 六年级 同学 参加 数学 竞赛 ， 五年级 人数 是 六年级 人数 的 (5/6) ， 后来 因为 下 暴雨 ， 五年级 有 25 人 不能 到校 参加 比赛 ， 这时 五年级 人数 是 六年级 人数 的 (4/5) ． 原来 五年级 参加 数学 竞赛 的 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4321", "content": "工人 叔叔 给 一个 礼堂 铺地砖 头 ， 上午 铺 了 (1/6) ， 下午 铺 了 (2/6) ， 一天 共铺 了 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20558", "content": "小 梅 为了 养 颜 ， 自己 配制 橙汁 ． 一瓶 纯 鲜橙汁 倒 出 2 升 后 ， 再 用水 兑 满 ， 这时 纯 鲜橙汁 与 水 的 比 是 1 ： 8 ， 原来 这 瓶 橙汁 有 多少 升 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4649", "content": "某 镇 共有 耕地 360 公顷 ， 今年 将 35% 的 耕地 改种 蔬菜 ， 剩下 的 种 粮食 ， 种 粮食 的 耕地 = 多少 公顷 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8880", "content": "某 集团 去年 的 营业额 为 13.03 亿元 ， 前年 比 去年 少 2.95 亿元 ． 前年 和 去年 的 营业额 共有 多少 亿元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8629", "content": "一 块 锡 铁合金 重 45 千克 ， 其中 铁 的 含量 约 占 60% ， 这块 合金 里 约 有 铁 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8002", "content": "某 工厂 今年 实际 全年 产值 比 原 计划 超额 18% ， 实际 完成 计划 的 百分之几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8566", "content": "把 一根 钢条 锯 成 4 段 要 用 12 分钟 ， 如果 锯 成 10 段 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18061", "content": "王 大伯 计划 明年 在 承包 的 荒山 上 植树 ， 其中 的 (2/5) 栽种 松树 ， (1/2) 栽种 苹果树 ， 其余 的 面积 栽种 梨树 ， 梨树 面积 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3646", "content": "24 的 (1/3) 比 16 少 多少 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6073", "content": "工厂 运 来 一批 原料 ， 原 计划 每天 用 15 吨 ， 可用 60 天 ， 实际 每天 用 12 吨 ， 这 批 原料 能 用 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3279", "content": "某 数 减去 2 ， 乘以 9 ， 再 加上 3 ， 最后 除以 4 ， 结果 等于 12 ． 求 这个 数 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2069", "content": "某 车队 运送 一批 救灾物资 ， 原 计划 每 小时 行驶 40 千米 ， 5 小时 到达 ． 实际 每 小时 比 原 计划 多 行驶 10 千米 ， 行 完全 程 需要 几小时 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4989", "content": "商店 运 来 18 箱 梨 ， 每箱 25 千克 ． 5 天 卖完 ， 平均 每天 卖 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2837", "content": "妈妈 买 回 一些 鸭蛋 和 12 个 鸡蛋 ， 吃 了 8 个 鸡蛋 后 ， 剩下 的 鸡蛋 和 鸭蛋 同样 多 ， 问 妈妈 一共 买 回 几个 蛋 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10488", "content": "5 月 12 日 ， 四川省 遭遇 了 特大 的 地震 灾害 ， 为了 支援灾区 人民 度过难关 ， 重建家园 ， 同学 们 人人 都 献出 了 一份 爱心 ． 实验 小学 五年级 同学 捐款 6000 元 ， 六年级 比 五年级 多 捐 (1/10) ， 六年级 同学 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1865", "content": "一 架 钢琴 售价 8500 元 ， 比 原价 降价 了 (3/20) ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22690", "content": "修 一条 公路 第一周 修 了 全长 的 (3/8) ， 第 二 周 修 了 余下 部分 的 (3/12) ， 这 是 还 剩 100 米 没 修 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "18939", "content": "一 个 圆锥形 谷堆 高 1.2 米 ， 占地面积 是 16 平方米 ， 把 这 堆 谷 装进 粮仓 里 ， 正好 占 这个 粮仓 容积 的 (1/3) ， 这个 粮仓 的 容积 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "292", "content": "一 根 绳子 有 10 米 ， 每天 用 去 (1/5) ， 多少 天 可以 全部 用 完 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16317", "content": "一 块 正方体 的 石料 ， 棱 长 是 6 dm ， 这块 石料 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17295", "content": "从 8 时 到 12 时 ， 王师傅 共 加工 320 个 零件 ， 平均 每 小时 加工 多少 个 零件 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17823", "content": "全校 840 名 同学 有 35 名 同学 参加 了 奥林匹克 数学 竞赛 ， 没有 参加 人数 是 参加 人数 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7380", "content": "把 5 克 糖 溶化 在 100 克 的 水中 ， 糖 占 糖水 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "762", "content": "某 书店 购书 一律 0.95 ， 小 红 买 了 一 本书 ， 比 原价 便宜 6 元 ， 这 本书 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "35", "content": "在 一 正方形 花池 的 4 周 栽 了 44 棵 柳树 ， 每 两棵 柳树 之间 的 间隔 是 20 米 ， 这个 正方形 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "65", "content": "张 明 有 120 元 钱 ， 买 书 用 去 80% ， 买 文具 的 钱 是 买 书 的 15% ． 买 文具 用 去 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "118", "content": "一 个 工厂 要 生产 3000 个 零件 ， 前 6 天 生产 了 750 个 ， 剩下 的 要 在 15 天 内 完成 ， 平均 每天 生产 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "163", "content": "一 本 字典 定价 9 元 ， 0.8 出售 后 还 赚 20% ， 这本 字典 进价 = 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "233", "content": "修 一段 长 324 米 的 路 ， 前 8 小时 共 修 了 240 米 ， 剩下 的 每 小时 修 21 米 ， 还要 几小时 才能 修 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "243", "content": "一 个 圆 的 半径 是 3 厘米 ， 如果 把 它 的 半径 延长 2 厘米 ， 那么 面积 增加 多少 ．", "knowledge": ["*", "+", "-", "^"], "difficulty": 0.4, "length": 11}
-{"question_id": "244", "content": "山上 有 苹果树 200 棵 ， 桃树 比 苹果树 多 (1/5) ， 桃树 有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "253", "content": "除数 是 6 ， 商 是 75 ， 余数 是 1 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "306", "content": "一 捆 电线 ， 第一次 用 去 全长 的 (1/4) ， 第 二 天 用 去 余下 的 (1/5) ， 这时 还 剩 108 米 ． 这 捆 电线 共 长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "316", "content": "甲乙 两辆 汽车 同时 从 同一 地点 向 相反 的 方向 行驶 ， 4 小时 后 两车 相距 300 千米 ， 已知 甲 车 每 小时 行 40 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "327", "content": "甲乙 两根 绳子 分别 长 9 米 和 6 米 ， 各剪 去 同样 长 的 一段 后 ， 乙 根 的 长 是 甲 根 的 (3/5) ， 甲 根 剪 去 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "340", "content": "鸡蛋 有 120 个 ， 鸭蛋 比 鸡蛋 多 (1/6) ， 请问 两种 蛋 共有 几个 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "362", "content": "计算 ： 234 + 432 - 4 * 8 + 330 / 5 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "406", "content": "54 除 多少 的 商 是 6 ， 余数 是 20 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "432", "content": "图书馆 里 有 一些 科技 书 和 文艺 书 ， 其中 科技 书 占 (4/5) ， 如果 用 文艺 书 换 走 科技 书 20 本 ， 那么 科技 书 占 全部 的 (8/15) ， 问 原来 科技 书 有 多少 本 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "440", "content": "甲队 调 (1/6) 的 人 给 乙 队 ， 两队 的 人数 就 相等 ． 原来 乙 队 是 甲队 人数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "514", "content": "一 项 工程 ， 12 个 工人 25 天 完成 ． 如果 要 20 天 完成 ， 需要 多少 个 工人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "581", "content": "教室 的 长 是 8 米 ， 宽 是 6 米 ， 高 是 3.5 米 ， 现在 要 粉刷 教室 4 周 的 墙壁 ， 扣除 门窗 的 面积 16 平方米 ， 要 粉刷 的 面积 = 多少 平方米 ？ 如果 每 2 平方米 用 涂料 1 千克 ， 粉刷 这个 教室 共 需 涂料 多少 千克 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "588", "content": "王 华 和 张 强 两 人 骑 自行车 同时 从 两地 相对 出发 ， 王 华 骑 到 全程 的 (5/8) 与 张 强 相遇 ， 张 强 继续 以 每 小时 12 千米 的 速度 向前 骑 ， 用 2.5 小时 骑 完 余下 的 路程 ， 求 王 华 的 速度 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "610", "content": "饲养场 养 了 257 只 公鸡 ， 268 只 母鸡 ， 平均 每 只 卖 35 元 ， 一共 卖 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "643", "content": "某 工程队 4 天 完成 一项 工程 的 (2/7) ， 照 这样 计算 ， 完成 这项 工程 一共 需要 多少 天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "706", "content": "春季 植树 ． 五年级 植树 12 棵 ， 六年级 植树 16 棵 ， 全校 植树 的 棵 数 是 5 、 六年级 植树 棵 数 的 3 倍 ， 全校 共 植树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "730", "content": "小 明 8 分钟 行走 了 35 米 ， 那么 小 明 平均 每分钟 行走 了 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "742", "content": "文具盒 22 元 一个 ， 买 3 个 文具盒 ， 一共 需要 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "754", "content": "服装店 购进 一批 衬衫 ， 其中 男式 衬衫 150 件 ， 女式 衬衫 比 男式 衬衫 的 (2/5) 多 20 件 ． 购进 女式 衬衫 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "771", "content": "为了 庆祝 国庆节 ， 在 润扬 大桥 的 栏杆 上 插 彩旗 ， 从头到尾 共 插 500 面 ， 每 两面 彩旗 中间 放 一 盆花 ， 一共 需要 多少 盆花 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "793", "content": "果园 里 苹果树 棵 数 的 (2/5) 相当于 梨树 棵 数 的 (3/7) ， 梨树 56 棵 ， 苹果树 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "829", "content": "食堂 大米 比 面粉 多 (5/6) ， 正好 多 300 千克 ， 食堂 面粉 有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "842", "content": "小 红 到 书店 想 买 一本 7.8 元 的 童话 书 ， 可是 差 0.7 元 ， 她 只好 买 了 5.1 元 的 笔记本 一本 ， 剩下 的 钱 正好 买 了 一枝 钢笔 ， 这 枝 钢笔 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "853", "content": "爸爸 开车 从 家 去 动物园 ， 去 时 平均 每 时 行 37.5 千米 ， 0.4 时 到达 ． 回来 时 ， 为了 赶时间 ， 只用 了 0.3 时 ． 爸爸 回来 时 平均 每 时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "915", "content": "在 一个 比例 中 ， 两个 内 项 的 积 是 10 ， 其中 一个 外 项 是 (5/2) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "923", "content": "某 机关 原有 工作人员 120 人 ， 现有 90 人 ． 精简 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "969", "content": "一 桶 油 ， 分 两次 倒 完 ． 第一次 倒 出 全部 的 (1/4) ， 第 二 次 比 第一次 多 倒 出 75 千克 ， 求 第一次 倒 出 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "978", "content": "光大 花卉市场 举办 花展 ， 展出 玫瑰 780 盆 ， 展出 的 兰花 是 玫瑰 的 (2/5) ， 展出 兰花 多少 盆 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1035", "content": "六年级 一班 有 50 人 ， 数学 测验 有 38 人 得 优秀 ， 成绩优秀 的 学生 占 全班 总 人数 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1120", "content": "甲乙 两个 修路 队 合 修 完 一条 公路 ， 甲队 修 的 公路 长 增加 到 2 倍 多 30 米 ， 才 和 乙 对 修 的 一样 多 ， 甲队 修 了 250 米 ． 这 条 公路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1125", "content": "小 刚 和 小强 在 400 米 的 环形 跑道 上 ， 从 同一 地点 相 背 出发 ． 小 刚 每秒 跑 4.5 米 ， 小强 每秒 跑 5.5 米 ， 出发 后 多少 秒 两 人 第一次 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1131", "content": "一 根 钢材 长 18.4 米 ， 锯下 3.8 米 后 ， 剩下 的 比 锯下 的 长 几米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1140", "content": "在 一个 停车场 上 ， 汽车 、 摩托车 共 停 了 48 辆 ， 其中 每辆 汽车 有 4 个 轮子 ， 每辆 摩托车 有 3 个 轮子 ， 这些 车 共 172 个 轮子 ， 停车场 上 有 摩托车 多少 辆 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1235", "content": "比 12 与 40 的 积 少 60 的 数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1249", "content": "王老师 要 买 一个 足球 和 4 根 跳绳 共用 50 元 ， 每个 足球 38 元 ， 每 根 跳绳 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1275", "content": "一 个 圆形 水池 周围 每隔 2 米 栽 一棵 杨树 ， 共 栽 了 40 棵 ， 水池 的 周长 = 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1278", "content": "(3/7) 再 添 上 多少 个 (1/7) 是 1 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1291", "content": "喜洋洋 和 灰 太 狼 在 体育场 进行 20000 米 赛跑 ， 灰 太 狼 的 速度 是 喜洋洋 速度 的 6 倍 ． 当 它们 从 起点 一起 出发 后 ， 喜洋洋 不停 地 跑 ， 灰 太 狼 跑 到 某 一处 开始 睡觉 ， 当 灰 太 狼 醒来 后 ， 喜洋洋 已经 领先 灰 太 狼 10000 米 ， 灰 太 狼 奋起直追 ， 当 喜洋洋 到达 终点 时 ， 灰 太 狼 仍 落后 200 米 ， 那么 灰 太 狼 睡觉 期间 ， 喜洋洋 跑 了 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1302", "content": "某 厂 去年 第一季度 各 月 分别 完成 本季度 计划 的 (2/5) 、 (1/3) 、 (3/8) ， 超额完成 第一季度 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1329", "content": "一 个 除法 算式 ， 除数 是 2.5 ， 商 是 5 ， 被除数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1338", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 行 了 全程 (3/8) 时 ， 正好 是 108 千米 ， 如果 这辆 汽车 行 了 全程 的 (2/3) ， 这时 ， 这辆 汽车 行 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1355", "content": "甲 数 的 (4/5) 与 乙 数 的 (3/4) 相等 ， 乙 数 是 24 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1372", "content": "一 列 火车 每 小时 行 95 千米 ， 小 明 家 和 省城 相距 285 千米 ， 小 明 坐火车 到 省城 需要 几小时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1392", "content": "800 板 巧克力 ， 每 2 板 包 一包 ， 每 8 包装 一盒 ． 一共 可以 装 多少 盒 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1393", "content": "王 叔叔 存入 银行 6000 元 ， 年利率 是 3.24% ， 存期 2 年 ． 到期 后 可以 取回 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1411", "content": "小 涛 家 买 了 一套 房子 准备 装修 ， 原 计划 花 12 万元 装修 ， 实际 装修 后 用 去 了 10.8 万元 ． 小 涛 家 实际 用 去 的 装修费 比 原 计划 节约 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1433", "content": "甲乙 两个 小镇 的 公路 长 75 千米 ． 小 王 驾驶 一辆 汽车 行驶 30 千米 共用 去 2 升 汽油 ． 照 这样 计算 ， 这辆 汽车 行 完全 程 还 需要 多少 升 汽油 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1462", "content": "某 工程队 3 天 修 完 一条 公路 的 (1/6) ， 修 完 这 条 路 需 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1466", "content": "某 山庄 今年 稻谷 收 66 吨 ， 比 去年 增产 10% ， 去年 这 山庄 收 稻谷 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1474", "content": "一 根 水泥 桩 露出 水面 2 m ， 在 水中 的 占 全长 的 (2/5) ， 水中 的 比 泥 中 的 多 1 m ， 这根 桩 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1514", "content": "东华 小学 要 买 50 套 课桌椅 ， 每张 桌子 75 元 ， 每 把 椅子 25 元 ． 一共 付 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1520", "content": "甲 数 是 3 ， 乙 数 是 0.25 ， 甲 数 与 乙 数 的 比值 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1536", "content": "5 箱 蜜蜂 一年 可以 酿 375 千克 蜂蜜 ． 小林 家养 了 这样 的 蜜蜂 13 箱 ， 一年 可以 酿 多少 千克 蜜蜂 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1538", "content": "两只 轮船 同时 从 青岛 去 上海 ， 18 小时 后 ， 甲 船 落后 乙 船 57.6 千米 ， 甲 船 平均 每 小时 行 32.5 千米 ， 乙 船 平均 每 小时 行 多少 千米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1553", "content": "2 吨 水泥 ， 用 去 (1/4) ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1591", "content": "一 堆 黄沙 ， 第一天 运走 25% ， 比 第 二 天 少运 4 吨 ． 这时 还 剩下 56 吨 ． 这 堆 黄沙 共 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1592", "content": "华阳 小学 六年级 有 女生 100 人 ， 男生 占 全年 级 总 人数 的 (5/9) ， 全年 级 有 学生 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1595", "content": "一 根 木头 ， 用 32 秒 的 时间 分成 了 5 段 ， 以 同样 的 速度 将 另 一根 木头 分成 7 段 ， 需要 多少 时间 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "1606", "content": "一 套 运动服 的 售价 是 240 元 ， 其中 上衣 占 售价 的 (5/8) ， 如果 只 买 上衣 ， 应付 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1611", "content": "小 明 体重 60 千克 ， 由于 生病 住院 ， 他 的 体重减轻 了 (1/15) ， 这时 小 明 的 体重 为 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1631", "content": "东江 水泥厂 今年 3 月份 生产 水泥 2700 吨 ， 比 计划 超产 20% ， 计划 生产 水泥 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1675", "content": "一 袋 大米 吃 了 15 千克 正好 是 这 袋 大米 的 (3/5) ， 还 剩下 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1688", "content": "小 红 看 一 本书 故事书 ， 第一天 看 了 全书 的 (1/9) ， 还 剩 几分 之 几 没 看 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1705", "content": "学校 买来 35 套 课桌椅 ， 其中 桌子 每张 115 元 ， 椅子 每张 85 元 ． 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1739", "content": "5 一 期间 ， 商场 打折 促销 ． 一款 原来 售价 1500 元 的 时尚手机 打 0.8 出售 ， 促销 期间 买 这 款 手机 可以 节省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1779", "content": "我 过 大多数 的 高速公路 的 最高 时速 为 每 小时 120 千米 ， 比 磁悬浮列车 的 时速 的 (3/10) 少 9 千米 ， 磁悬浮列车 的 时速 可 达到 每 小时 多少 千米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1789", "content": "学校食堂 买来 面粉 180 千克 ， 比 买来 的 大米 少 (3/5) ． 学校 买来 的 面粉 和 大米 共 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1790", "content": "小 华 的 爸爸 买 了 一辆 15.6 万元 的 小轿车 ， 如果 按 车价 的 10% 缴纳 购置税 ， 小 华 的 爸爸 应 缴纳 购置税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1795", "content": "一 辆 汽车 从 甲地 开 乙地 ， 行 了 全程 的 (1/3) ， 剩下 的 路程 如果 以 每 小时 60 千米 的 速度 行驶 ， 3 小时 可以 到达 ， 甲乙 两地 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1818", "content": "我校 教学楼 有 4 层 ， 如果 每层 有 6 个 教室 ， 每个 教室 摆 8 盆花 ， 一共 要 摆 多少 盆花 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1830", "content": "超市 运 来 一 怕 运动服 ， 卖 了 6 天 ， 平均 每天 卖 了 108 件 ， 还 剩 112 件 ， 这 批 运动服 一共 有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1832", "content": "5000 元 存入 银行 3 年 ， 年利率 是 2.5% ． 到期 可 得 利息 多少 元 ． （ 不 扣 利息税 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "1883", "content": "一 个数 的 2 倍 比 它 的 1.5 倍 多 1.9 ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1888", "content": "某 书店 经 每 本 14.98 元 的 价格 购进 一批 书 ， 每 本 售价 21.7 元 ， 卖完 后 ， 除了 收回 成本 外 ， 还 获得 了 504 元 的 利润 ， 这个 书店 共 购进 这 批 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1911", "content": "爱心 超市 运 来 1780 千克 大米 ， 卖 了 8 天 后 ， 还 剩 100 千克 ， 平均 每天 卖 大米 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1919", "content": "一 桶 油 重 (3/2) 千克 ， (1/2) 桶 油 重 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1929", "content": "食堂 买来 8 吨 煤 ， 11 天 烧 完 ， 平均 每天 烧煤 多少 吨 ？ （ 用 分数 表示 ）", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "1938", "content": "长方体 的 长 、 宽 、 高 分别 是 7 cm 、 6 cm 、 3 cm ， 它 的 表面积 = 多少 cm ^ 2 ．", "knowledge": ["*", "+"], "difficulty": 0.5, "length": 13}
-{"question_id": "1970", "content": "4 个 同学 在 假期 里 约定 ， 每 两 人 互通 一封信 ， 他们 共 要 写 多少 封信 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1988", "content": "一 种 商品 ， 第一次 打 了 0.9 ， 第 二 次 又 降价 5% ， 现在 该 商品 是 原价 的 多少 % ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2075", "content": "做 5 根 长 2 米 ， 管 口 直径 是 0.2 米 的 通风管 ， 至少 需要 铁皮 多少 平方米 ．", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "2079", "content": "8 + 88 + 888 + 8888 + 88888 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "2102", "content": "小 天才 培训 学校 选出 一批 优秀 的 学生 参加 全国 作文 比赛 和 数学 比赛 ， 结果 7 人 两项 比赛 都 获奖 了 ， 有 13 人 两项 比赛 都 没有 获奖 ， 已知 作文 比赛 获奖 的 有 12 人 ， 数学 比赛 获奖 的 有 28 人 ． 那么 这 批 优秀 的 学生 一共 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2141", "content": "小 明 的 体重 是 28 千克 ， 比 表弟 中 6 千克 ， 而 爸爸 的 体重 是 表弟 的 4 倍 ， 爸爸 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2195", "content": "光明 小学 有 学生 485 人 ， 其中 40% 的 同学 参加 了 课外 科技 活动 小组 ， 参加 课外 科技 活动 小组 的 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2205", "content": "林场 春天 种 500 棵 树苗 ， 成活率 为 98% ， 成活 了 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2216", "content": "县 图书馆 有 故事书 15.4 万册 ， 比 科技 书 少 5.8 万册 ， 这 两种 书 共 多少 万册 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2255", "content": "小 红 把 1000 元 钱 存入 银行 ， 存 整存整取 3 年 ， 年利率 是 3.24% ． 到期 时 小 红 可 得 利息 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2267", "content": "一 件 工作 ， 甲 每天 完成 全部 工作 的 (1/8) ， 乙 每天 完成 全部 工作 的 (1/12) ， 两 人 合作 2 天 ， 能 完成 全部 工作 的 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2305", "content": "一 根 铁丝 长 10 米 ， 第一次 剪 去 它 的 (2/5) ， 第 二 次 剪 去 (3/10) 米 还 剩下 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2316", "content": "3 个 同学 比赛 跳高 ， 王 军 跳 了 1.52 米 ， 张 华 比 王 军 多 跳 了 0.18 米 ， 李 林 比 张 华 少 跳 了 0.11 米 ， 李 林 跳 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2332", "content": "一 本 故事书 原价 24.8 元 ． 现在 按 原价 的 0.6 出售 ， 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2337", "content": "荣 荣 家 买来 一筐 苹果 ， 爸爸 吃 了 其中 的 (1/3) ， 荣 荣 吃 了 其中 的 (1/4) ， 剩下 的 都 是 妈妈 吃 的 ， 如果 爸爸 比 荣 荣 多 吃 了 3 个 苹果 ， 那么 ， 妈妈 吃 了 多少 个 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2339", "content": "学校 准备 发 《 感恩 教育 》 读本 给 16 个 班 ， 每班 50 本 ， 还要 给 学校 图书室 留 30 本 ． 学校 应 购买 《 感恩 教育 》 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2349", "content": "已知 等差数列 首项 是 5 ， 第 8 项 是 26 ， 这个 等差数列 的 公差 = ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2350", "content": "一 个 县 今年 小麦 总产量 是 35 万吨 ， 比 去年 增产 12% ， 去年 全县 小麦 总产量 = 多少 万吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2455", "content": "一 道 除法 算式 ， 除数 是 18 ， 商 是 21 ， 余数 是 5 ， 则 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2466", "content": "五年级 同学 收集 邮票 48 枚 ， 六年级 收集 的 比 五年级 多 (1/3) ， 六年级 收集 邮票 多少 枚 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2468", "content": "弟弟 (2/3) 小时 写 了 24 个 大字 ， 弟弟 平均 每 小时 写 几个 大字 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2479", "content": "一 辆 汽车 上午 行驶 3 小时 ， 下午 用 同样 的 速度 行驶 4 小时 ． 如果 上午 行驶 了 315 千米 ， 下午 行驶 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2498", "content": "45 + 129 的 和 乘 28 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2506", "content": "鸡 有 36 只 ， 鸭 的 只 数 是 鸡 的 2 倍 ， 鸡 和 鸭 一共 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2519", "content": "3.14 与 268 的 和 乘 7 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2570", "content": "一 堆 煤 用 去 20% ， 剩下 的 比 用 去 的 多 12 吨 ， 这 堆 煤 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2587", "content": "原来 每 台 录音机 售价 500 元 ， 现在 每 台 售价 350 元 ， 每 台 降价 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2598", "content": "建筑工地 有 一堆 垃圾 分 两次 运走 ， 每 一次 运 15 吨 ， 第 二 次 运 的 吨数 是 第一次 的 1.2 倍 ． 这 堆 垃圾 有 多少 吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2599", "content": "甲 数 的 (5/7) 是 10 ， 甲 数 又 是 乙 数 的 (3/2) 倍 ， 乙 数 = ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2625", "content": "大豆 出油率 是 16% ， 要 榨 豆油 64 千克 ， 需用 大豆 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2651", "content": "多少 千克 的 (3/4) 是 (9/10) 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2717", "content": "8400 / 12 * 7 的 积 ， 商 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2719", "content": "从 30 里 减去 48 的 (1/3) ， 所得 的 差 去除 3 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2732", "content": "4 （ 1 ） 班 有 42 名 同学 ： 订阅 《 少年报 》 的 有 31 名 同学 ， 订阅 《 童话 报 》 的 有 27 名 同学 ． 每人 至少 订 其中 一份 报纸 ， 有 多少 名 同学 既 订 《 少年报 》 又 订 《 童话 报 》 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2747", "content": "修 一条 公路 ， 已经 修 了 20 千米 ， 比 未 修 的 少 (3/8) ， 这 条 公路 有 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2772", "content": "一 批 货物 120 吨 ， 2 天 运走 这 批 货物 的 (3/4) ． 平均 每天 运货 多少 吨 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2791", "content": "百货店 运 来 15 包 毛巾 ， 每包 20 条 ， 每 条 售价 4 元 ． 这些 毛巾 一共 售价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2801", "content": "李 总务 帮 学校 买来 5 张 办公桌 和 8 把 椅子 ， 共 花 去 1236 元 钱 ． 每张 办公桌 的 价钱 是 180 元 ， 每 把 椅子 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2866", "content": "服装厂 3 月份 计划 加工 5400 件 衣服 ， 结果 上 半月 完成 了 (3/4) ， 下半月 完成 了 (2/3) ， 这个 月 比 原 计划 多 加工 多少 件 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2894", "content": "建筑工地 运来了 4 车 水泥 ， 每 车 4.5 吨 ， 共用 了 4410 元 ， 平均 每吨 水泥 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2903", "content": "王老师 要 批改 48 篇 作文 ， 已经 批改 了 13 篇 ． 如果 每 小时 批改 7 篇 ， 还要 几小时 能 批改 完 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2916", "content": "某 学校 图书馆 有 故事书 375 本 ， 比 科技 书 少 35 本 ， 连环画 是 科技 书 的 3 倍 ． 连环画 比 故事书 多 多少 本 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "2929", "content": "甲 、 乙 两 数 的 和 是 60 ， 甲 数 是 乙 数 的 50% ， 乙 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2954", "content": "9 ： 6 = 15 ： 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2957", "content": "一 辆 汽车 从 甲地 驶向 乙地 ， 第一 小时 行 了 50 千米 ， 第 二 小时 行 了 全程 的 20% ， 还 剩下 190 千米 ． 甲乙 两地 相距 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2972", "content": "一 本 故事书 有 197 页 ， 小 军 看 了 42 页 ， 剩下 的 要 在 5 天 看 完 ， 平均 每天 看 几页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3003", "content": "一 列 快车 和 一列 慢车 同时 从 相距 500 千米 的 两地 相向 而 行 ． 已知 快车 每 时 行 70 千米 ， 慢车 每 时 行 55 千米 ， 经过 多少 时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3064", "content": "每瓶 洗发水 18 元 ， 买 4 瓶 送 一瓶 ， 妈妈 一次 买 10 瓶 ， 共用 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3094", "content": "京沪 速 全长 1300 千米 ， 一辆 汽车 从 北京 出发 开往 上海 ， 已经 行 了 700 千米 ， 剩下 的 路程 每 小时 行 120 千米 ， 还 行 几小时 就 到达 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3111", "content": "加工 一批 零件 ， 黄 师傅 (1/5) 天 完成 ， 洪 师傅 (1/7) 天 完成 ． 两 人 合作 多少 天 就 可以 完成 加工 任务 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3115", "content": "一 瓶 油 ， 将 它 的 (1/4) 倒入 一个 重 200 克 的 玻璃杯 里 ， 再 把 杯 放在 天平 的 一个 盘 里 ， 然后 在 天平 的 另 一个 盘中 放 人 500 克 砝码 ， 这时 天平 就 平衡 了 ． 这 瓶 油 重 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3161", "content": "王老师 计划 用 100 元 钱 买 一些 文具 作为 奖品 奖给 优秀学生 干部 ． 他 先 用 65.4 元 买 了 6 个 笔记本 ， 剩下 的 钱 准备 买 5 支 钢笔 ， 那么 钢笔 的 单价 必须 控制 在 多少 钱 以内 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3180", "content": "小 红 看 一本 60 页 的 故事书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/4) ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3188", "content": "小 平 今年 是 他 父亲 年龄 的 (1/3) ， 若干年 后 他们 相差 22 岁 ， 那么 小 平 今年 多少岁 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3193", "content": "20032003 + 20320030 + 23200300 + 22003003 + 20030032 + 20300320 + 23003200 = ．", "knowledge": ["+"], "difficulty": 0.5, "length": 13}
-{"question_id": "3202", "content": "造纸厂 今年 前 5 个 月 完成 全年 造纸 任务 的 45% ， 再生产 1650 吨 就 可以 完成 全年 任务 ． 造纸厂 今年 计划 造纸 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3242", "content": "饲养 小组 养 灰 兔 75 只 ， 养 的 白兔 是 灰 兔 的 5 倍 ． 两种 兔 共 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3255", "content": "某年 9 月份 晴天 有 20 天 ， 雨天 的 天数 比 晴天 少 (4/5) ， 阴天 的 天数 比 雨天 多 (1/2) ． 这个 月 阴天 有 多少 天 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3258", "content": "超市 运进 水果 ， 第一批 运进 320 千克 ， 第 二 排 运进 400 千克 ， 这 两批 运进 水果 的 重量 占 超市 现在 所有 水果 的 (2/3) ， 超市 现在 一共 有 水果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3268", "content": "甲乙 两 数 的 差 是 144 ， 甲 数 比 乙 数 的 3 倍 少 14 ， 那么 甲 数 = ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3271", "content": "五年级 一班 48 个 同学 集体 合影 ． 定价 是 24.5 元 ， 给 4 张 相片 ． 另外 加印 是 每张 2.3 元 ． 全班 每人 一张 ， 再 送给 班主任 和 科任 教师 5 张 ， 一共 要 付 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "3301", "content": "学校 买来 12 只 足球 和 18 只 篮球 ， 共 付出 1392 元 ， 每 只 足球 68 元 ， 每 只 篮球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3379", "content": "一 辆 汽车 从 甲 城 到 乙 城 3 小时 行 126 千米 ， 照 这样 的 速度 ， 行 完全 程 共用 7 小时 ， 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3407", "content": "甲 、 乙 两 数 的 比 是 5 ： 4 ， 甲 数 比 乙 数多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3416", "content": "小兵 与 小 军 两 人 同时 从 两地 相向 而 行 ， 小兵 每分钟 走 70 米 ， 比 小 军 每分钟 少 走 10 米 ． 12 分钟 后 两个 相遇 ， 两地 相距 多少 米 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "3421", "content": "某人 出差 从 甲地 到 乙地 ， 第一天 坐火车 行 了 全程 的 40% ， 第 二 天 乘 汽车 行 了 270 千米 ， 这时 离 乙地 还有 全程 的 (3/8) ， 甲乙 两地 之间 的 路程 = 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3439", "content": "把 3 米 长 的 木料 锯 成 4 小 段 ， 每 锯下 一小 段 需 5 分钟 ． 全部 锯 完 需 多少 分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3456", "content": "李师傅 每 小时 织 (2/5) 米 的 毯子 ， (2/3) 小时 织 多少 米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3475", "content": "比 的 后 项 是 2.5 ， 比值 是 5 ， 比 的 前项 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "3478", "content": "果园 里 一共 收 了 220 吨 苹果 ， 用 13 辆 卡车 运 了 一趟 后 还 剩下 12 吨 ， 每辆 卡车 一趟 能 运 多少 吨 苹果 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3487", "content": "一 个数 的 (5/8) 与 10 的 (4/5) 相等 ， 求 这个 数 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3500", "content": "红星 小学 四年级 有 96 名 同学 去 参观 科技馆 ， 平均 分成 4 队 ， 每队 分成 3 组 ， 平均 每组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3501", "content": "花园 小学 四年级 两个 班 共有 学生 80 人 ． 开学 初 学校 为 四年级 全部 更换 了 新 的 单人 课桌 和 椅子 ， 每张 课桌 68 元 ， 每 把 椅子 32 元 ， 花园 小学 四年级 一 共用 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3513", "content": "98 / 16 * 112 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3514", "content": "三角形 的 面积 是 6.2 cm ^ 2 ， 高 是 3.1 米 厘米 ， 底 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3561", "content": "用 货车 运 水泥 ， 要 运 45 吨 ， 已经 运 了 15 吨 ， 剩下 的 用 载重 5 吨 的 货车 一次 运 完 ， 需要 几辆 这样 的 货车 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3583", "content": "有 一列 长 200 米 的 火车 ， 每秒 行驶 15 米 ． 它 通过 一座 长 850 米 的 大桥 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3589", "content": "0.58 / 0.14 竖 式 计算 时 ， 除 得 的 商 是 4 ， 余数 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3645", "content": "三年级 5 个 班 参加 欢迎 中国航天 英雄 报告团 活动 ， 每班 选 15 个 同学 ， 每个 同学 要 2 个 气球 ， 一共 要 多少 个 气球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3724", "content": "三年级 同学 参加 “ 陈省身 杯 竞赛 颁奖典礼 ” ， 如果 每排 坐 6 人 ， 可以 坐满 12 排 ； 如果 每排 坐 8 人 ， 则 可以 坐满 多少 排 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3744", "content": "李 阿姨 用 1080 元 买 了 30 箱 饮料 ． 上网 查询 后 ， 发现 该 产品 从 厂家 直接 购买 ， 每箱 只 需 28 元 ． 她 多 花 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3757", "content": "一 件 上衣 与 一条 裤子 的 总价 为 360 元 ， 上衣 与 裤子 的 价钱 比 是 5 ： 4 ， 买 一条 裤子 应 花 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3775", "content": "一 堆 黄沙 重 400 吨 ， 第一天 运走 了 (1/4) ， 第 二 天 运走 30% ， 还 剩 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "3784", "content": "已知 ： 梨子 4 千克 6 元 ， 桔子 5 千克 11 元 ． 张大妈 买 12 千克 梨子 和 20 千克 桔子 ， 共 应付 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "3843", "content": "果园 里 有 255 棵 苹果树 ， 再 种 35 棵 梨树 就 正好 和 苹果树 相等 ． 如果 梨树 每 20 棵 种 一排 ， 梨树 一共 可以 种 多少 排 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3852", "content": "超市 上午 运进 水果 402.3 千克 ， 下午 运进 398.7 千克 ， 要 把 这些 水果 分装 在 每箱 可 装 4.5 千克 的 包装箱 里 ， 需要 准备 多少 个 这样 的 包装箱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3906", "content": "杨树 与 柳树 棵 数 的 比 是 5 ： 4 ， 柳树 的 棵 数 比 杨树 少 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3932", "content": "甲乙 两地 相距 496 千米 ， 一辆 客车 从 甲地 开往 乙地 ， 每 小时 行 64 千米 ， 行驶 1 小时 后 ， 一辆 货车 从 乙地 开往 甲地 ， 每 小时 行 56 千米 ， 货车 开出 几小时 后 与 客车 相遇 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3946", "content": "某 修路 队 前 3 天 每天 修路 160 千米 ， 后 4 天 共 修路 710 千米 ． 平均 每天 修路 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "3950", "content": "王 叔叔 把 年终奖金 2500 元 存入 银行 ， 定期 3 年 ， 年利率 是 3.25% ． 到期 时 ， 王 叔叔 可 拿到 本息 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4012", "content": "工厂 有 一堆 煤 ， 用 掉 (2/3) 后 ， 又 运 来 36 吨 ， 这时 工厂 的 煤 正好 与 原来 一样 多 ， 这个 工厂 原有 煤 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4018", "content": "在 路 的 一侧 从头至尾 栽树 ， 每隔 9 米 栽 一棵 ， 共 栽 了 100 棵 ， 这 条 路 有 多长 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4050", "content": "在 学校 举行 的 体育 达标 测试 中 ， 六年级 200 名 同学 参加 测试 ， 合格率 是 98% ， 有 多少 名 同学 达标 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4079", "content": "一 本 225 页 的 故事书 ， 读 了 多少 页 后 ， 还 剩 全书 的 (2/5) ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4084", "content": "小张 的 劳动 生产 技术 不断 提高 ， 第一天 生产 零件 30 个 ， 第 二 天 生产 零件 32 个 ， 第 3 天 生产 零件 34 个 … ， 照 这样 ， 每天 增加 2 个 ， 他 第 12 天 应 生产 零件 多少 个 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4118", "content": "鸵鸟 每 小时 能 跑 64 千米 ， 照 这样 的 速度 ， 它 2 小时 能 跑 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4129", "content": "佳佳 5 分钟 走 300 米 ， 照 这样 的 速度 ， 她 从 家里 到 学校 走 了 15 分钟 ， 佳佳 家 到 学校 的 路程 有 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4142", "content": "小 红 看 一本 故事书 ， 第一天 看 了 68 页 ， 第 二 天 比 第一天 多 看 了 16 页 ， 还 剩下 116 页 没 看 ． 这本 故事书 有 多少 页 ？", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4143", "content": "一 个 平行四边形 相邻 的 两条 边 的 长度 是 3 厘米 和 4 厘米 ， 它 的 周长 = 多少 厘米 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4159", "content": "设 座位 若干 排 ， 若 每排 坐 30 人 ， 则 有 8 人 无 座位 ， 若 每排 坐 31 人 ， 则 空 26 个 座位 ， 共有 几排 座位 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4179", "content": "修 一条 公路 ， 第一天 修 了 全路 的 (2/7) ， 第 二 天 修 了 全路 的 (1/5) ， 还 剩 全路 的 多少 没有 修 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4197", "content": "湖边 有 一排 柳树 ， 每 两棵树 之间 相距 6 米 ， 小 明 从 第 1 棵 树 跑 到 第 20 棵 树 ， 共 跑 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4219", "content": "有 一批 书 ， 第一天 卖出 400 本 ， 第 二 天 卖出 占 总数 的 (1/3) ， 第 3 天 卖出 总数 的 30% ， 还 剩下 150 本 ． 这 批 书 一共 有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4234", "content": "小 明 看 一本 120 页 的 故事书 ， 第一天 看 了 20% ， 第 二 天 看 了 40% ， 两天 一共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4250", "content": "学校 有 一块 800 平方米 实验田 ， 用 500 平方米 种 豆角 ， 剩余 部分 的 40% 种 黄瓜 ， 其余 的 全部种 西红柿 ， 种 西红柿 的 面积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4289", "content": "一 个数 的 (3/2) + (1/2) 得 (12/5) ， 这个 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4294", "content": "我们 这栋 教学楼 有 3 层楼 安排 了 教室 ， 每层 有 6 间 教室 ， 如果 每间 教室 里 装有 8 盏 日光灯 ， 问 这栋 教学楼 总共 要 装 多少 盏 日光灯 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "4299", "content": "一 堆 煤 ， 原 计划 每天 烧 4 吨 ， 可以 75 天 ， 由于 改进 炉灶 ， 每天 烧 3 吨 ， 这 堆 煤 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4346", "content": "a 、 b 两地 相距 2500 千米 ， 甲 、 乙 两辆 汽车 同时 从 a 地 出发 开往 b 地 ， 4.2 小时 后 乙 领先 甲 42 千米 ， 已知 甲 每 小时 行 70 千米 ， 乙 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4358", "content": "甲乙 两辆 汽车 分别 从 南京 和 上海 同时 出发 ， 在 沪宁 高速公路 上 相对 而 行 ． 甲 车 每 小时 行 103 千米 ， 乙 车 每 小时 行 112 千米 ， 经过 1.2 小时 两车 还 相距 16 千米 ． 沪宁 高速公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4383", "content": "在 学校 为 四川 地震 举行 的 捐款 活动 中 ， 六年级 同学 踊跃 捐款 献爱心 ， 共 捐款 1200 元 ， 比 五年级 同学 的 捐款 数多 20% ， 两个 年级 共 向 灾区 捐款 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4412", "content": "湖滨 种 着 一排 柳树 ， 每 相邻 两棵树 之间 相距 8 米 ， 小 明 从 第 5 棵 树 跑 到 第 100 棵 树 ， 一共 跑 了 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4415", "content": "一 块 长方形 菜地 ， 宽 是 20 米 ， 长 比 宽 多 (1/4) ， 问 这块 菜地 的 面积 = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4436", "content": "小 猴 分桃 ． 一共 有 30 千克 桃子 ， 平均 分给 5 个 小伙伴 ． 每 只 小 猴 能 分 到 多少 千克 的 桃子 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4468", "content": "五年级 的 同学 去 参观 东莞 展览馆 ， 共用 去 4 小时 ， 其中 路上 用 去 的 时间 占 (1/5) ， 休息 的 时间 占 (1/6) ， 剩下 的 是 游览 时间 ， 游览 的 时间 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4479", "content": "一 个 油桶 ， 装进 (2/5) 桶 花生油 后 ， 连 桶 共 重 3.5 千克 ， 把桶 装满 连 桶 共 重 6.5 千克 ， 这 桶 油 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4490", "content": "甲 数 是 32 ， 甲乙 两 数 的 最小 公倍数 288 ， 最大公约数 是 4 ， 那 乙 数 应该 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4493", "content": "a 城 到 b 城 的 公路 长 160 千米 ． 一辆 汽车 走 高速路 的 速度 是 80 千米 / 时 ， 走 普通 公路 的 速度 是 40 千米 / 时 ． 从 a 城 去 b 城 走 高速路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4497", "content": "在 家电 下乡 活动 中 ， 陈 伯伯 买 了 一台 彩色 电视机 ， 获得 政府 给予 销售价 的 13% 资金 补贴 后 ， 这样 他 实际 付出 1131 元 ． 这 台 彩色 电视机 的 销售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4504", "content": "甲 、 乙 两车 分别 从 相距 650 km 的 a 、 b 两地 同时 出发 ， 相向 而 行 ． 甲 车 每 小时 行 70 km ， 乙 车 每 小时 行 60 km ． 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4622", "content": "某班 统计 数学考试 成绩 ， 平均 成绩 为 85.13 分 ． 事后 复查 ， 发现 将 小 玲 的 成绩 87 分 误 作 78 分 计算 ， 经 重新 计算 后 ， 该班 平均 成绩 是 85.31 分 ． 这个 班 有 多少 个个 学生 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4640", "content": "从小 行 小区 开往 云南 北路 的 26 路 公交车 ， 从 总站 开出 时 车上 有 (1/8) 的 座位 空 着 ， 到 “ 雨花 新村 ” 这 一站 时 ， 有 6 人 下车 ， 10 人 上车 ， 这时 车上 座位 全部 坐满 ， 这辆 公交车 共有 多少 个 座位 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4664", "content": "期中考试 中 ， 我们 班 语文 优秀 的 有 28 人 ， 数学 优秀 的 有 25 人 ． 全班 共有 的 35 人 中 两门 都 优秀 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4716", "content": "李 丽 看 一本 故事书 ， 第一周 看 了 (2/5) ， 还 剩 几分 之 几 没有 看 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4752", "content": "某 厂 计划 投资 30 万元 ， 实际 投资 24 万元 ， 节省 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4814", "content": "王老师 从 报社 获得 了 1780 元 的 稿费 ， 按照 国家标准 ， 超过 800 元 的 部分 按照 20% 的 税率 纳税 ． 王老师 实际 得到 稿费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4829", "content": "水果店 运 来 15 箱 苹果 ， 每箱 重 12 千克 ， 水果店 运 来 苹果 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4872", "content": "滨河公园 原来 有 20 条 船 ， 每天 收入 360 元 ， 照 这样 计算 ， 现在 增加 了 15 条 船 ， 每天 可以 多 收入 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4922", "content": "学校 阅览室 看书 的 人 ， 人人 有 座位 ， 而且 座无虚席 ． 过 了 一会儿 ， 看书 的 人 走 了 (1/4) ， 又 新 来 了 24 人 ， 现在 座位 不够 了 ， 其中 8 人 是 2 人 合 坐 一个 座位 ， 这时 在 阅览室 看书 的 人 有 多少 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4961", "content": "某地 出租车 收费 标准 为 ： 起步价 为 6 元 ， 3 千米 后 每 千米 加收 1.2 元 ， 某人 乘坐 出租车 5 千米 ， 则 应付款 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "4963", "content": "一 种 服装 现在 售价 180 元 ， 比 原来 便宜 了 (3/8) ， 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4999", "content": "11 + 88 + 66 + 33 + 77 + 55 = ．", "knowledge": ["+"], "difficulty": 0.4, "length": 11}
-{"question_id": "5006", "content": "龟 兔 赛跑 ， 全程 2000 米 ， 龟 每分钟 爬 25 米 ， 兔 每分钟 跑 320 米 ． 兔 自 以为 速度 快 ， 在 途中 睡 了 一 觉 ， 结果 龟 到 终点 时 ， 兔 离 终点 还有 400 米 ， 兔 在 途中 睡 了 几分钟 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5009", "content": "长方体 的 体积 是 120 m ^ 3 ， 长 是 5 米 ， 宽 是 4 米 ， 高 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5036", "content": "一 堆 垃圾 共 280 吨 ， 环卫工人 第一天 运走 全部 垃圾 的 20% ， 第 二 天 运走 全部 垃圾 的 45% ， 还有 多少 垃圾 没 运走 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5063", "content": "果园 里 有 苹果树 120 棵 ， 梨树 的 棵 数 是 苹果树 的 (2/3) ， 果园 里 有 梨树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5069", "content": "李 叔叔 在 一栋 大楼 里 乘 电梯 从 地上 10 层 到 地上 9 层 要 (3/20) 分钟 ， 他 乘 电梯 从 地上 8 层 到 地下 1 层 车库 ， 要 用 多少 分钟 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5089", "content": "妈妈 今年 40 岁 ， 是 小 芳 的 4 倍 ， 小 芳 今年 多少岁 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5111", "content": "强强 读 一本 故事书 ， 第一天 读 了 (3/8) ， 第 二 天 读 了 36 页 ， 这时 一共 读 了 全书 的 60% ． 这本 故事书 一共 有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5126", "content": "5 里面 有 多少 个 (1/4) ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5135", "content": "一 件 运动服 原价 120 元 ， 现在 打 0.8 出售 ， 这件 运动服 现价 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5137", "content": "粮食 仓库 存有 大米 1650 袋 ， 正好 是 存有 的 面粉袋 数 的 6 倍 ． 粮库 中 存有 的 面粉 比 大米 少 多少 袋 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5144", "content": "一 盒 糖 ， 连 盒 共 重 500 克 ， 如果 吃 去 40% ， 剩下 的 糖 连 盒 重 还有 340 克 ， 求 原来 盒 中 糖 的 重量 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5205", "content": "小 芳 平均 每 分 打字 32 个 ． 一份 稿子 有 1250 个 字 ， 小 芳 打 了 30 分 后 ， 还 剩下 多少 个 字 没 打 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5214", "content": "一 箱 苹果 重 8 千克 ， 吃 了 (1/4) ． 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5221", "content": "水果店 星期天 卖出 香蕉 、 桔子 和 菠萝 3 种 水果 一共 150 千克 ， 其中 香蕉 27.5 千克 ， 卖出 的 桔子 的 数量 是 香蕉 的 3.6 倍 ． 水果店 星期天 卖出 菠萝 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5231", "content": "某 玻璃厂 要 为 商场 运送 1000 个 玻璃杯 ， 双方 商定 每个 运费 为 1 元 ． 如果 打碎 一个 ， 这个 不但 不 给 运费 ， 而且 要 赔偿 3 元 ， 结果 运到 目的地 后 结算 时 ， 玻璃杯 厂 共 得 运费 920 元 ， 求 打碎 了 几个 玻璃杯 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5237", "content": "张师傅 与 李师傅 共同 加工 1000 个 零件 ． 张师傅 先 做 了 4 天 ， 一共 做 了 220 个 ， 剩下 的 由 李师傅 15 天 做 完 ， 李师傅 每天 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5250", "content": "光明 小学 有 毕业生 210 人 ， 考入 重点中学 的 占 (1/15) ， 其余 升入 普通中学 ， 升入 普通中学 的 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5266", "content": "用 面积 为 9 平方分米 的 方砖 ， 480 块 正好 铺满 ， 如果 用 边长 为 4 分 米 的 方砖 ， 需要 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5273", "content": "小麦 上学 要 走 18 分钟 ， 她 的 速度 是 130 米 / 分 ． 她家 到 学校 有 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5364", "content": "挖 一个 长 和 宽 都 是 5 米 的 长方体 菜窖 ， 要 使 菜窖 的 容积 是 50 立方米 ， 应该 挖 多少 米 深 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5404", "content": "男 比 女 多 10 人 ， 女 比 男 少 10% ， 女生 = 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5413", "content": "李强 6 月份 的 生活费 为 255 元 ， 比 计划 节省 了 15% ， 节省 了 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5419", "content": "东郊 果园 收获 苹果 2475 千克 ， 装 了 39 筐 ， 还 剩 1500 千克 ， 每 筐 苹果 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5449", "content": "客 、 货 两车 分别 从 相距 900 千米 的 甲乙 两城 同时 出发 ， 相向 而 行 ． 已知 客车 从 甲 城 到 乙 城 需要 10 小时 ， 货车 从 乙 城 到 甲 城 需要 15 小时 ． 两车 出发 后 多少 小时 相遇 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5483", "content": "我国 岛屿 海岸线 长 约 14000 km ， 是 大陆 海岸线 长 的 (7/9) ； 大陆 海岸线 长 是 陆地 边界线 长 的 (9/11) ． 我国 陆地 边界线 长 多少 km ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5633", "content": "一 个 棱 长 为 20 cm 的 正方体 容器 里 装 了 一半 的 水 ， 现 将 一块 铁块 投入 容器 中 ， 铁块 完全 沉没 在 水底 ， 水面 上升 了 2 cm ， 这块 铁块 的 体积 = 多少 立方厘米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "5687", "content": "有 78 吨 煤 ， 已经 运 了 2 次 ， 每次 运 16 吨 ， 还 剩 多少 吨 没 运 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5701", "content": "95 / 135 与 815 的 和 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5726", "content": "服装厂 原来 做一套 学生 服用 2.6 米 布料 ， 采用 新 裁剪 法 后 ， 每套 节约 用布 0.3 米 ． 原来 做 460 套 学生服 的 布 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5754", "content": "乐乐 从 甲地 步行 去 乙地 ， 第一 小时 行 了 全程 的 (1/4) ， 第 二 小时 行 了 全程 的 20% ， 这时 离 乙地 还有 22 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5756", "content": "一 个数 的 (4/5) 是 80 ， 这个 数 的 (1/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5846", "content": "一 段 公路 ， 汽车 45 分行 了 60 千米 ， 相当于 这 段 路 全长 的 (2/5) ， 这 段 路 全长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5853", "content": "一 箱 矿泉水 24 瓶 ， 每瓶 1.8 元 ． 买 一箱 一共 需要 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "5859", "content": "丽丽 看 一 本书 共 240 页 ， 她 已经 看 了 这 本书 的 40% ， 还 剩 多少 页 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5868", "content": "红星 小学 买 了 一些 体育用品 ． 买 足球 用 去 了 135.60 元 ， 买 篮球 比 足球 多 花 了 12.20 元 ． 红星 小学 买 足球 和 篮球 共 花 了 多少 元 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5899", "content": "某 服装厂 计划 每天 加工 服装 125 件 ， 实际 20 天 加工 了 3000 件 ， 实际 每天 比 计划 多 加工 服装 多少 件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5902", "content": "四年级 一班 有 34 人 ， 共 借书 544 本 ， 四年级 一班 平均 每人 借书 多少 本 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5906", "content": "妈妈 买 了 5 米 布 ， 给 小 明 做 了 2 套 同样 的 衣服 ， 还 剩下 1.4 米 ， 小 明 的 每套 服装 用 不 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5918", "content": "某校 有 女生 280 人 ， 女生 人数 是 男生 的 (4/5) ． 男生 有 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "5985", "content": "小 红 有 2 件 背心 ， 3 条 短裤 ， 她 穿衣 时 有 多少 种 搭配 方法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6022", "content": "一 辆 货车 从 a 地 把 苹果 运到 b 地 ， 去 的 时候 每 小时 行 40 千米 ， 用 了 6 小时 到达 ， 回来 的 时候 每 小时 行 60 千米 ， 需要 几小时 才能 回到 a 地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6051", "content": "小 芳 在 计算 除法 时 ， 把 除数 32 错 写成 320 ， 结果 得到 商 是 48 ． 正确 的 商 应该 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6057", "content": "从 30 里面 减去 40 个 0.25 的 和 ， 再 乘 0.05 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6061", "content": "六年级 （ 1 ） 班 参加 义务劳动 ， 计划 派 16 名 同学 去 植树 ， 平均 每人 要 植 3 棵 ， 后来 增加 了 一些 同学 ， 这时 平均 每人 只 需 植树 2 棵 ． 问 增加 了 多少 名 同学 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6088", "content": "4 （ 1 ） 班 50 人 中 有 28 人 喜欢 吃 香蕉 ， 27 人 喜欢 吃 苹果 ， 14 人 两种 水果 都 喜欢 吃 ． 请问 有 多少 人 喜欢 的 不是 这 两种 水果 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6096", "content": "用 废纸 生产 再生纸 的 再生 率 为 80% ， 利民 造纸厂 用 回收 的 废纸 生产 了 120 吨 再生纸 ． 这些 再生纸 需要 回收 多少 吨 废纸 才能 生产 出来 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6130", "content": "奥林匹克 火炬 在 中国 某省 4 天 传递 了 820 千米 ， 平均 每天 传递 了 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6137", "content": "育才 学校 有 男生 785 人 ， 女生 576 人 ， 育才 学校 一共 有 学生 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6152", "content": "51 的 28 倍 大约 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6155", "content": "拖拉机 耕 一块 地 ， 每 时 耕 这块 地 的 (1/9) ， 一天 工作 8 时 ， 耕 了 这块 地 的 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6181", "content": "全班 女生 和 男生 的 人数 比 是 1 ： 3 ． 一次 考试 ， 男生 平均分 是 80 ， 全班 的 平均分 是 82 ， 女生 平均分 = 多少 分 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "6187", "content": "修 一段 长 (7/8) 千米 的 公路 ， 已经 修 了 (3/5) 千米 ， 剩下 的 比 已修 的 少 多少 千米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6254", "content": "一 本书 有 400 页 ， 小 红 已经 看 了 265 页 ， 余下 的 准备 9 天 看 完 ， 平均 每天 要 看 多少 个 好 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6282", "content": "纸箱 里 放 有 大小 、 质量 完全相同 的 塑料 球 ， 其中 2 个 绿 的 、 3 个 黄 的 、 5 个 红 的 ． 从中 任意 摸 一个 ， 摸 出 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6340", "content": "今年 比 去年 减产 (1/5) ， 今年 产量 是 去年 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6360", "content": "某人 在 一次 选举 中 ， 需 全部 选票 的 (2/3) 才能 当选 ， 计算 全部 选票 的 (3/4) 后 ， 他 得到 的 选票 已 达到 当选 选票 数 的 (5/6) ， 他 还 需要 得到 剩下 选票 的 多少 才能 当选 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6427", "content": "小 明 骑 自行车 从 家 到 学校 ， 已知 他 每分钟 走 310 米 ， 走 12 分钟 ， 距 学校 还有 210 米 ， 他家 距 学校 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6439", "content": "商场 开展 店 庆 活动 ， 一台 冰箱 打 0.8 后 是 2400 元 ， 这 台 冰箱 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6470", "content": "果园 里 苹果树 比 梨树 多 420 棵 ， 梨树 的 棵 树 是 苹果树 的 (3/5) ， 苹果树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6575", "content": "一 种 电脑 现价 每 台 3800 元 ， 比 原来 降低 了 200 元 ， 降低 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6581", "content": "汽车 的 现价 比 原价 降低 了 (1/7) ， 现价 是 原价 的 ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6648", "content": "果园 去年 收 苹果 4500 千克 ， 比 前年 增 25% ， 前年 收 苹果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6679", "content": "水果店 运 来 25 筐 桃子 ， 桃子 的 筐 数 是 苹果 的 (5/6) ， 运 来 桃子 和 苹果 一共 多少 筐 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6682", "content": "机械 加工厂 加工 一台 机器 原来 需要 1.2 吨 钢材 ． 后来 采用 了 新 科技 ， 每 台 只 需要 0.8 吨 钢材 ． 现在 加工 300 台 机器 的 钢材 ， 原来 做 多少 台 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6725", "content": "少年宫 乐队 有 女生 18 人 ， 男生 17 人 ． 合唱队 的 人数 是 乐队 的 4 倍 ， 合唱队 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6744", "content": "商店 以 每枝 10 元 的 价格 购进 一批 钢笔 ， 加上 40% 的 利润 以后 定价 出售 ， 当 卖出 这 批 钢笔 的 (3/4) 时 就 已经 获利 240 元 ． 这 批 钢笔 共有 多少 枝 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6776", "content": "鸡 的 孵化期 是 21 天 ， 鸭 的 孵化期 比 鸡 长 (1/3) ， 鸭 的 孵化期 = 多少 天 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6780", "content": "五年级 有 学生 180 人 ， 五年级 比 六年级 的 (5/9) 还 多 15 人 ， 六年级 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6827", "content": "一 辆 汽车 从 甲地 出发 ， 3 小时 行 了 195 千米 ， 照 这样 的 速度 ， 再行 4 小时 就 可 到达 乙地 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6832", "content": "小 明 有 课外书 48 本 ， 是 小 兰 的 (3/4) ， 是 小 红 的 (6/7) ， 小 红 比 小 兰 多 多少 本书 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6892", "content": "刘校长 带 1300 元 去 买 篮球 ， 买 了 16 个 后 还 剩 20 元 ， 平均 每个 篮球 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6900", "content": "甲 、 乙 、 丙 3 袋 粮食 重量 比 是 3 ： 4 ： 5 ， 已知 甲 、 乙 共 重 700 克 ， 求 丙 袋 的 重量 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6910", "content": "超市 运 来 45 辆 红色 自行车 ， 15 辆 黄色 自行车 ． 已经 售出 全部 自行车 的 (2/3) ， 售出 了 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6922", "content": "一 袋 年 奶 3 元 钱 ， 36 元 钱 可以 买 到 多少 袋 牛奶 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6931", "content": "服装厂 要 生产 6000 套 服装 ， 前 5 天 已经 生产 了 这 批 服装 的 40% ， 余下 的 服装 要 在 6 天 内 完成 ， 平均 每天 要 生产 多少 套 服装 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6951", "content": "□ / 7 = 26 … 6 ， □ 里 的 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6953", "content": "一 个 西瓜 被 爸爸 平均 切成 数块 ． 爸爸 和 妈妈 吃 了 这个 西瓜 的 (3/4) ， 小强 吃 了 2 块 ， 3 人 正好 把 这个 西瓜 吃 完 ． 这个 西瓜 被 平均 切成 了 多少 块 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6992", "content": "2005 * 20062006 - 2006 * 20052005 = ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6997", "content": "已知 两个 数 的 商 是 4 ， 而 这 两个 数 的 差 是 39 ， 那么 这 两个 数 中 较 小 的 数 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7005", "content": "水果店 运 来 410 千克 水果 ， 上午 卖出 139 千克 ， 下午 卖出 183 千克 ， 还 剩 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7012", "content": "一 桶 油 用 去 40% ， 还 剩 84 千克 ， 这 桶 油 原来 有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7028", "content": "2008 年 奥运会 各项 比赛 门票 销售 正在 火热 进行 中 ， 一场 手球 比赛 的 最低 票价 为 30 元 ， 一场 游泳 比赛 的 最低 票价 比 手球 比赛 的 4 倍 少 20 元 ， 一场 游泳 比赛 的 最低 票价 比 手球 比赛 贵 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7066", "content": "小 明 与 爸爸 到 电脑城 去 买 电脑 ， 他们 看到 了 一台 标价 8000 元 的 电脑 ． 小 明 爸爸 对 经理 说 ： “ 打 0.8 可以 ？ ” ， 经理 想 了 想 ， 说 ： “ 你 说 的 价格 ， 再 加 5% ， ” 就 成交 了 ． 请问 小 明 家 买 这 台 电脑 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7086", "content": "学校 去年 种树 225 棵 ， 今年 比 去年 增加 8% ， 今年 种树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7098", "content": "(1/5) * 10 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7118", "content": "从 1 里面 每次 减去 (1/10) ， 减去 多少 次 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7123", "content": "张 新 看 一本 120 页 的 科普 书 ， 第一天 看 了 全书 的 30% ， 第 二 天 看 了 全书 的 (2/5) ， 还 剩下 多少 页 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7150", "content": "春节 过后 ， 小 明 把 400 元 压岁钱 存入 银行 ， 年利率 2.25% ， 存期 一年 ． 到期 时 ， 小 明 可以 拿到 利息 多少 元 ． （ 利息税 忽略不计 ）", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7154", "content": "一 箱 肥皂 分 发给 某 车间 工人 ， 平均 每人 可 分 到 12 块 ． 若 只 分给 女工 ， 平均 每人 可 分 到 20 块 ； 若 只 分给 男工 ， 平均 每人 可 分 到 多少 块 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7183", "content": "农机厂 计划 生产 800 台 ， 平均 每天 生产 44 台 ， 生产 了 10 天 ， 余下 的 任务 要求 8 天 完成 ， 平均 每天 要 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7185", "content": "3 名 工人 2 小时 加工 零件 90 个 ， 要 在 10 小时 完成 1800 个 零件 的 加工 ， 需要 工人 多少 名 ．", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7198", "content": "某 厂 4 月份 实际 生产 洗衣机 5000 台 ， 超产 1000 台 ． 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7202", "content": "一 辆 汽车 4 小时 行 了 320 公里 ， 这辆 汽车 从 甲 城 出发 到 乙 城 总共 用 了 7 小时 ． 甲 、 乙 两城 之间 距离 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7211", "content": "货场 有 一批 货物 要 运走 ， 第一天 运走 总数 的 (3/8) ， 第 二 天 运走 总数 的 25% ， 还有 270 吨 没有 运走 ， 这 批 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7212", "content": "大西洋 平均 深度 约 为 3.62 千米 ， 印度洋 平均 深度 比 大西洋 深 0.27 千米 ， 印度洋 比 北冰洋 深 2.59 千米 ． 北冰洋 的 平均 深度 约 = 多少 千米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7221", "content": "一 瓶 果汁 有 2 升 ， 如果 把 它 分别 倒入 (1/4) 升 的 玻璃杯 中 ， 可以 倒 几杯 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7240", "content": "小 李 翻过 一座 山 ， 山路 长 6 千米 ， 上山 时 每 小时 行 2 千米 ， 下山 时 沿 原 路 返回 ， 每 小时 行 3 千米 ， 求 小 李 上 下山 的 平均速度 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7257", "content": "小 军 要 游 200 米 ， 已 游 了 (3/5) ， 还 剩 多少 米 没 游 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7258", "content": "贺兰 一小 六年级 一班 原来 有 学生 54 人 ， 其中 男生 占 全班 的 (5/9) ， 后来 男生 转 走 了 几 人 ， 现在 男生 占 全班 的 (13/25) ， 转 走 了 几名 男生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7269", "content": "甲乙 两地 相距 380 千米 ， 一列 动力火车 从 甲 站 出发 行驶 了 全程 的 (5/19) ， 行驶 了 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7293", "content": "一 辆 汽车 从 总站 开出 ， 全 车 座位 上 有 (5/6) 坐 了 乘客 ， 到达 中点站 时 ， 有 12 人 下车 ， 20 人 上车 ， 这时 车 内 座位 恰好 坐满 ． 这辆 车 有 多少 个 座位 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7295", "content": "一 种 盐水 重 200 克 ， 盐 的 重量 占 盐水 的 20% ， 加 了 一些 水 后 ， 盐 的 重量 占 盐水 重量 的 12.5% ． 加 了 多少 克 水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7312", "content": "小 红 看 一 本书 ， 已 看 的 页数 与 剩下 的 页数 的 比 是 2 ： 3 ， 如果 再 看 56 页 ， 正好 看 完全 书 的 (3/4) ． 这 本书 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7326", "content": "服装厂 做 一件 男 上衣 需用 2.5 米 布料 ， 一条 男 裤子 需用 1.8 米 布料 ， 现有 600 米 布料 ， 可以 做 多少 件 男 上衣 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7364", "content": "2.8 / 0.8 / 0.5 = ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7395", "content": "看 一 本书 ， 第一天 看 了 全书 的 (2/7) ， 第 二 天 比 第一天 少 看 5 页 ， 还 剩 62 页 没 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7408", "content": "工厂 生产 了 1015 筒 毛 球 ， 每 筒 6 个 ． 一共 生产 了 多少 个 羽毛球 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7417", "content": "6 （ 1 ） 班 有 50 人 ， 某 天 该班 出勤率 为 96% ， 这天 缺席 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7418", "content": "比 40 千克 多 (1/5) 千克 = 多少 千克 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "7459", "content": "通过 特快专递 寄 邮件 每份 需要 22 元 ． 李 阿姨 寄 邮件 时 付出 200 元 ， 找回 68 元 ． 她 共 寄 了 几份 邮件 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7487", "content": "美术 兴趣小组 有 36 人 ， 比 音乐 兴趣小组 少 20% ． 美术 兴趣小组 和 音乐 兴趣小组 相差 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7490", "content": "来 电话 时 每次 响铃 时间 为 4 秒 ， 两次 之间 间隔 2 秒 ， 这个 电话响 了 8 次 ， 从 响铃 到 结束 共 持续 了 几秒 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "7496", "content": "果园 里 有 桃树 48 棵 ， 相当于 苹果树 的 (3/4) ， 苹果树 有 多少 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7534", "content": "甲 、 乙 两 人 从 一楼 开始 比赛 爬楼梯 ， 甲 爬楼梯 的 速度 是 乙 的 1.5 倍 ． 他们 同时 出发 ， 当 甲 爬 到 16 楼 时 ， 乙 在 多少 楼 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7536", "content": "一 个 电影院 共有 812 个 座位 ， 票价 15 元 ， 这场 的 票 都 卖完 了 ， 这场 电影 的 收入 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7553", "content": "一 根 绳子 长 24 米 ， 剪 去 全长 的 (1/6) ， 剩下 的 比 全长 短 了 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "7555", "content": "推销员 每 工作 1 小时 可以 挣 6.5 元 ， 另外 ， 每 做成 一次 交易 他 可以 得 2.5 元 的 奖金 ． 某个 星期 他 共 收入 212.5 元 ， 其中 做成 了 7 次 交易 ， 他 这个 星期 工作 了 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7598", "content": "果品 公司 运 来 苹果 (3/4) 吨 ， 运 来 的 梨 是 苹果 的 (5/6) ， 运 来 的 桃 比 梨 少 (1/5) ， 运 来 的 桃 比 梨 少 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7607", "content": "小 兰 看 一 本书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 全书 的 (1/5) ， 正好 是 66 页 ． 第一天 看 了 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7652", "content": "幼儿园 王 阿姨 买 了 345 个 小点心 ， 给 大 班 的 小朋友 每人 发 了 3 个 ， 正好 把 点心 发 完 ． 这个 幼儿园 大 班 有 小朋友 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7654", "content": "求 是 小学 组织 少先队员 去 采集 动物 标本 ． 男生 采集 了 95 件 标本 ， 占 所 采集 标本 总数 的 (5/8) ． 问 ： 女生 采集 了 多少 件 标本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7657", "content": "猎豹 的 速度 是 马 的 2.25 倍 ． 如果 马 每 时 跑 64.4 千米 ， 猎豹 每 时 比 马 多 跑 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7661", "content": "某 工程 由 甲 单独 做 25 天 后 ， 再 由 乙 单独 做 60 天 即可 完成 ． 如果 甲 、 乙 两 人 合作 ， 需 40 天 完成 ， 现在 甲 先 单独 做 34 天 ， 然后 再 由 乙 来 单独 完成 ， 还 需要 做 多少 天 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7686", "content": "某 个体 服装商 清仓 甩卖 ， 将 一件 衣服 的 原 标价 连续 两次 降 15% ， 这时 的 标价 为 289 元 ， 已知 这件 衣服 进价 是 原 标价 的 70% ， 这件 衣服 进价 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7721", "content": "小林 阅读 一 本书 ， 前 3 天 他 共 看 了 156 页 ， 后 9 天 他 平均 每天 看 32 页 ， 这些 天 中 小林 平均 每天 看书 多少 页 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "7722", "content": "从 动物园 到 火车站 20 千米 ， 张师傅 每天 开车 行驶 5 个 来回 ， 张师傅 每天 行驶 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7729", "content": "苹果 的 产量 是 梨 的 2 倍 ， 已知 苹果 和 梨 共有 120 吨 ， 梨 有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7781", "content": "李 大爷 家 有 黑 兔 172 只 ， 黑 兔 的 只 数 比 白兔 多 75 只 ， 李 大爷 家 有 白兔 多少 只 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7828", "content": "某 工程队 修 一条 长 20 千米 的 公路 ， 已经 修 了 20% ， 还 剩 多少 千米 没有 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7844", "content": "某 学校 开展 环保 活动 ， 有 4 个 小组 收集 了 768 节电池 ． 每个 小组 有 8 人 ， 他们 平均 每人 收集 废电池 多少 节 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7862", "content": "一 件 工作 ， 甲 先 单独 完成 (2/3) 用 了 (1/5) 小时 ， 如果 全 完成 ， 要 用 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7911", "content": "一 批 钢材 第一次 用 去 20% ， 第 二 次 用 去 (1/2) 吨 ， 还 剩下 3 吨 ， 这 批 钢材 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7931", "content": "大 妙 乡 要 修 一条 新 公路 ， 第一个 周 修 了 全长 的 (1/5) ， 第 二 个 周 修 了 600 米 ， 这时 两个 周 刚好 修 了 全长 的 60% ． 这 条 公路 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7942", "content": "商店 所有 货物 打 0.8 出售 ， 爸爸 买 了 一个 剃须刀 花 了 120 元 ， 这种 剃须刀 原来 卖 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8030", "content": "小 刚 看 一本 故事书 ， 第一天 看 了 全书 的 (1/3) ， 第 二 天 又 看 了 8 页 ， 这时 已 看 的 页数 与 未 看 的 页数 的 比 是 2 ： 3 ， 这 本书 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8033", "content": "燃烧 的 蜡烛 ． 桌子 上 原来 有 12 根 点燃 的 蜡烛 ， 先 被 风 吹灭 了 3 根 ， 不久 又 一阵风 吹灭 了 2 根 ， 最后 桌子 上 还 剩 几根 蜡烛 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8040", "content": "36 个 学生 回答 两个 问题 时 ， 答对 第一 题 的 有 23 人 ， 答对 第 二 题 的 有 25 人 ， 两 题 都 答对 的 有 14 人 ， 两 题 都 没 答对 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "8047", "content": "食堂 运 来 600 千克 大米 ， 已经 吃 了 4 天 ， 每天 吃 50 千克 ． 剩下 的 5 天 吃 完 ， 平均 每天 吃 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8067", "content": "5 / 2.7 与 1.3 的 和 ， 商 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8085", "content": "师傅 计划 生产 40 个 零件 ， 实际 比 计划 多 生产 25% ， 实际 生产 多少 个 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8089", "content": "一 件 皮毛 大衣 的 单价 是 954 元 ， 一件 t恤衫 的 单价 是 9 元 ， 皮毛 大衣 的 单价 是 t恤衫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8101", "content": "用 1.5 * 1.6 的 积 减去 0.6 后 去除 0.36 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8137", "content": "一 根 长 32 米 的 绳子 ， 剪 去 8 米 后 ， 剩下 的 做 短绳 ． 每 根 短绳 长 4 米 ， 剩下 的 绳子 可以 做 几根 短绳 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8199", "content": "一 个数 的 3 倍 是 180 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8241", "content": "麦当劳 叔叔 准备 送 出 玩具 猫 手镯 58 个 、 玩具 小车 67 个 给 学习 好 的 同学 ， 平均 在 5 天 内 送 完 ， 每天 送 出 多少 个 玩具 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8248", "content": "王老师 买 了 2000 元 的 国家 建设 债券 ， 定期 3 年 ， 年利率 是 7.11% ， 到期 时 他 获得 的 本息 一共 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8269", "content": "某个 旅游景点 ， 游客 每 6 人 乘坐 一辆 游览车 ， 一共 有 408 辆 游览车 ， 可以 同时 供 多少 人 参观 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8287", "content": "一 列 火车 从 长沙 开往 广州 ， 每 小时 行 70 千米 ， 这 列 货车 开出 1 小时 后 ， 一列 客车 从 广州 出发 开往 长沙 ， 每 小时 行 60 千米 ， 客车 经 4.5 小时 后 ， 与 货车 相遇 ． 长沙 到 广州 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "8289", "content": "某 汽车 制造厂 11 月 制造 汽车 5400 台 ， 比 计划 多 生产 600 台 ， 实际 比 计划 增产 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8319", "content": "王师傅 加工 一批 零件 ， 第一天 加工 了 (1/5) ， 第 二 天 又 加工 了 30 个 ， 这时 已 加工 的 与 未加工 的 个数 比 是 2 ： 3 ， 这 批 零件 一共 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8321", "content": "已知 6 （ 1 ） 班 男 、 女生 人数 比 为 5 ： 3 ， 男生 比 女生 多 8 人 ， 男生 有 多少 人 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8379", "content": "两地 间 的 路程 是 280 千米 ． 甲乙 两辆 汽车 同时 从 两地 开出 ， 相向 而 行 ， 3.5 小时 相遇 ． 甲 车 每 小时 行 47.5 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8438", "content": "一 段 绳子 长 176 米 ， 第一次 剪 了 46 米 ， 第 二 次 剪 了 44 米 ， 这时 绳子 比 原来 短 了 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8444", "content": "客 、 货 两车 分别 从 甲 、 乙 两地 同时 出发 ， 相向 而 行 ， 4.5 小时 后 相遇 ． 客车 每 小时 行 56 千米 ， 货车 每 小时 行 60 千米 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8452", "content": "梨 的 筐 数 是 苹果 的 (3/4) ， 苹果 的 筐 数 是 橘子 的 (4/5) ， 梨 有 150 筐 ， 橘子 多少 筐 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8453", "content": "一 个 盛 水 的 正方体 容器 ， 棱 长 20 厘米 ， 现 放入 10 个 鸡蛋 （ 浸没 ） ， 水面 升高 了 1 厘米 ， 求 一个 鸡蛋 的 体积 = ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8463", "content": "水果 批发市场 运 来 一批 菠萝 ， 第一周 卖出 (17/20) 吨 ， 第 二 周 卖出 的 比 第一周 少 (1/5) 吨 ， 两周 一共 卖出 菠萝 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8509", "content": "六年级 共有 学生 108 名 ， 其中 女同学 68 名 ， 女同学 占 全年 级 人数 的 多少 （ 用 分数 表示 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8535", "content": "6 （ 1 ） 班 有 学生 60 人 ， 男生 人数 是 全班 的 (7/12) ， 又 转 来 几名 女生 后 ， 这时 男生 人数 是 全班 的 (5/9) ． 又 转 来 几名 女生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8558", "content": "34 毫米 比 90 毫米 少 多少 毫米 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8561", "content": "慢车 身长 125 米 ， 车速 每秒 22 米 ， 快车 身长 140 米 ， 车速 每秒 27 米 ， 慢车 在 前面 行驶 ， 快车 在 后面 追 上 完全 超过 需要 多少 秒 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8565", "content": "用 400 吨 小麦 磨 面粉 ， 出粉率 85% ． 可以 磨 面粉 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8590", "content": "修路 队 修 一段 公路 ， 第一天 修 了 全长 的 25% ， 第 二 天 修 了 全长 的 20% ． 第一天 修 了 50 米 ， 还 剩 多少 米 没有 修 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8614", "content": "圆珠笔 和 铅笔 的 单价 比 为 4 ： 3 ， 学校 买 了 15 支 圆珠笔 和 16 支 铅笔 一 共用 去 了 54 元 ， 那么 圆珠笔 的 单价 = 多少 元 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8726", "content": "3 个 同学 跳绳 ， 小 明 跳 了 240 下 ， 小强 跳 的 是 小 明 跳 的 (5/8) ， 小 亮 跳 的 是 小强 跳 的 (2/3) ． 小 亮 跳 了 多少 下 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8777", "content": "李 华 买 一顶 草帽 用 1.8 元 ， 买 一把 茶壶 用 2.5 元 ， 又 买 了 一个 热水瓶 ， 3 样 东西 正好 用 了 9 元 ． 买 热水瓶 用 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8793", "content": "花果 林场 有 桃园 (3/8) 公顷 ， 占 果园 的 总面积 的 (1/4) ． 果园 的 总面积 有 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8819", "content": "两个 因数 都 是 6 ， 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8839", "content": "有 3 个 小朋友 ， 每次 选 2 个人 排成 一排 拍照片 ， 一共 有 多少 种 拍法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8945", "content": "一 个 西瓜 ， 妈妈 吃 了 它 的 (1/8) ， 丁丁 吃 了 它 的 (2/8) ， 他们 一共 吃 了 这个 西瓜 的 几分 之 几 ？ （ ）", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9078", "content": "重阳节 市 体委 组织 登山 比赛 ． 在 长 达 845 米 的 山路 中 ． 每隔 65 米 设 一个 服务站 （ 起点 和 终点 不 设 ） ． 共 设 多少 个 服务站 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9080", "content": "水果店 运 来 一批 水果 ， 第一天 卖出 全部 的 (2/8) ， 第 二 天 卖出 全部 的 (3/8) ， 两天 一共 卖出 全部 水果 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9111", "content": "每千克 苹果 3.25 元 ， 爸爸 买 了 14 千克 苹果 ， 付出 了 50 元 ， 应 找回 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9130", "content": "学校 体育 训练队 3 天 喝 了 90 瓶 矿泉水 ， 照 这样 计算 ， 还有 180 瓶 矿泉水 ， 还 能 喝 几天 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9143", "content": "小 明 骑 自行车 到 姥姥家 ， 他 的 自行车 的 轮子 的 直径 是 1 米 ， 若 姥姥家 离 小 明 家 628 米 ． 则 到达 姥姥家 时 小 明 的 自行车 至少 要 转 多少 圈 ． （ 假设 小 明 的 自行车 走 直线 ）", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9165", "content": "一 件 羽绒服 打 0.7 出售 ， 现在 每件 280 元 ， 现价 比 原价 便宜 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9208", "content": "林场 去年 种植 了 1000 棵 树苗 ， 死亡率 是 2% ， 林场 种植 的 这 批 树苗 的 成活率 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "9245", "content": "6 （ 1 ） 班 有 40 人 ， 有 (3/4) 的 同学 订 了 《 小学生 数学 报 》 ， 有 (4/5) 的 同学 订 了 《 小学生 语文 学习 》 ， 两种 都 订 的 至少 有 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9251", "content": "有 一堆 螺丝 和 螺母 ， 若 一个 螺丝 配 2 个 螺母 ， 则 多 10 个 螺母 ； 若 1 个 螺丝 配 3 个 螺母 ， 则 少 6 个 螺母 ． 共有 多少 个 螺丝 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9252", "content": "一 个数 的 40% 比 它 的 (2/9) 多 64 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9289", "content": "有 15 只 甲 a 足球队 ， 进行 双循环 比赛 （ 每 两 支队 赛 两场 ） ， 共 要 举行 多少 场 比赛 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9322", "content": "假期 时间 ， 王 叔叔 要 去 青岛 旅游 ． 王 叔叔 家 到 青岛 825 千米 ， 他 坐火车 3 小时 行 了 495 千米 ． 王 叔叔 还 需 几小时 到达 青岛 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9334", "content": "环保 小队 要 栽种 500 棵 树苗 ， 5 天 后 还有 180 棵 没 栽 ， 环保 小队 平均 每天 栽种 多少 棵 树苗 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9342", "content": "花园里 有 75 盆 菊花 ， 月季花 比 菊花 的 12 倍 多 15 盆 ， 花园里 有 多少 盆 月季花 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9448", "content": "两个 加数 的 和 比 第一个 加数 大 4.75 ， 比 第 二 个 加数 大 9.65 ， 这 两个 加数 的 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9488", "content": "李老师 看 一 本书 ， 第一天 看 了 全书 的 (1/5) ， 第 二 天 看 了 全书 的 (1/4) ， 还 剩下 88 页 没有 看 ， 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9511", "content": "镇海 雅乐 学校 的 运动会 入场 时 ， 全班 正好 排成 相等 的 6 行 ． 小林 排 在 第 二 行 ， 从前 数 ， 她 是 第 5 个 ， 从 后 数 她 是 第 3 个 ， 这个 班 共有 多少 人 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9566", "content": "李 华 读 一本 故事书 ， 第一天 读 了 全书 的 (1/5) ， 第 二 天 读 了 全书 的 (2/5) ， 两天 一共 读 了 全书 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "9592", "content": "六年级 有 138 名 学生 订杂志 ， 其中 有 (5/6) 的 学生 订 《 科学 画报 》 ， 有 (2/3) 的 学生 订 《 智力 大王 》 ． 两种 读物 都 订 的 有 多少 名 学生 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "9597", "content": "一 个数 的 (4/5) 是 80 ， 这个 数 的 (3/4) = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9650", "content": "商店 原有 面粉 300 吨 ， 又 运 来 240 吨 ， 如果 这些 面粉 9 天 卖完 ， 平均 每天 卖 面粉 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9658", "content": "某校 初 3 英语 口试 达到 优秀 标准 的 有 60 人 占 总 人数 的 30% ， 在 扇形 统计图 中 ， 表示 良好 等级 的 占 50% ， 良好 等级 的 有 多少 人 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9672", "content": "一 种 电视机 ， 原来 售价 1200 元 ， 现在 的 售价 是 1080 元 ． 降价 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9681", "content": "一 种 洗衣机 现在 每 台 售价 3000 元 ， 比 原来 降低 了 750 元 ， 现在 每 台 的 售价 是 原价 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9682", "content": "神机妙算 ： 650000 / 125 / 2 / 5 / 8 = ．", "knowledge": ["/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9749", "content": "小小 超市 新 进 25 瓶 苹果酱 ， 草莓酱 比 苹果酱 的 2 倍 多 5 瓶 ． 草莓酱 有 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9820", "content": "有 3 件 上衣 、 2 条 裤子 、 1 条 裙子 ， 要 配成 一套 衣服 有 多少 种 不同 的 配法 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "9828", "content": "一 本 童话 书 有 48 页 ， 每页 25 行 ， 每行 20 个 字 ， 这本 故事书 共 多少 个 字 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "9849", "content": "食品 商店 运 来 鸡蛋 和 鸭蛋 共 14 筐 准备 节日 供应 ， 其中 鸭蛋 占 总 筐 数 的 (3/7) ， 因 供应 需要 ， 又 运 来 几 筐 鸭蛋 ， 这时 鸭蛋 占 总 筐 数 的 50% ． 后来 又 运 来 多少 筐 鸭蛋 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9856", "content": "祝 飞 办 了 一张 手抄报 ． “ 趣味 数学 ” 栏目 大约 占 了 手抄报 的 (1/8) ， “ 学海 拾贝 ” 栏目 大约 占 了 手抄报 的 (1/4) ， “ 古今中外 ” 栏目 比 “ 趣味 数学 ” 和 “ 学海 拾贝 ” 两个 栏目 的 版面 少 占 手抄报 的 (2/32) ， “ 古今中外 ” 栏目 占 了 手抄报 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9874", "content": "修路 队 原 计划 25 天 修 一条 路 ， 每天 修 480 米 ， 结果 比 原 计划 提前 1 天 完成 任务 ， 实际 每天 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9883", "content": "图书室 有 故事书 315 本 ， 比 科技 书 少 129 本 ， 两种 书 共有 多少 本 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9962", "content": "一 根 绳子 ， 截去 20% 以后 ， 再 接上 6 m ， 结果 比 原来 的 绳子 长 1.5 m ， 这根 绳子 原来 长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10001", "content": "妈妈 在 超市 买 1 袋 大米 和 3 千克 白糖 一 共用 去 42 元 ． 已知 这 袋 大米 的 价钱 是 27 元 ， 每千克 白糖 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10002", "content": "汽车 从 武平 到 龙岩 ， 去 时 用 了 3 小时 ， 返回 用 了 2 小时 ， 往返 平均速度 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10045", "content": "清明 前 ， 四年级 （ 1 ） 班 的 同学 决定 自己 做 小白花 去 祭扫 烈士墓 ， 他们 分成 6 个 小组 ， 每 小组 9 人 ， 共 做 了 864 朵 小白花 ， 平均 每位 同学 做 了 多少 朵 小白花 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10050", "content": "把 576 瓶 可乐 平均 装 在 24 个 盒子 中 ， 每盒 售价 是 48 元 ， 平均 每瓶 售价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10051", "content": "甲 数 比 乙 数 的 85% 多 0.8 ． 甲乙 两 数 的 和 是 56.3 ， 乙 数 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10077", "content": "一 辆 汽车 4 小时 行 280 千米 ， 照 这样 的 速度 ， 5 小时 行驶 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10265", "content": "一 批 货物 ， 第一次 运走 它 的 (1/3) ， 第 二 次 运走 它 的 (4/9) ， 这时 还 剩 36 吨 ， 这 批 货物 原来 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10287", "content": "125 与 43 的 和 被 239 与 197 的 差 除 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10298", "content": "一 辆 客车 从 a 地 开往 b 地 ， 行 了 全程 的 80% ， 这时 距 b 地 52 千米 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10299", "content": "公共汽车 上 原有 一些 人 ， 又 上来 25 人 ， 然后 再 下去 了 8 人 ， 这时 还 剩 34 人 ． 公共汽车 上 原来 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10328", "content": "猴子 和 大象 的 年龄 加 起来 一共 22 岁 ， 再 过 6 年 ， 猴子 和 大象 的 年龄 加 起来 共 多少岁 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10333", "content": "一 条 路 长 200 米 ， 在 路 的 一旁 从头至尾 每隔 5 米 植 一棵树 ， 一共 要 植 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10394", "content": "一 种 服装 降价 20% 后 售价 为 84 元 ， 原来 的 售价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10398", "content": "有 - 根 木头 ， 要 锯 成 13 段 ． 每 锯开 一处 需要 5 分 （ 钟 ） ， 全部 锯 完 一共 要 多少 分 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10407", "content": "从 540 中 连续 减去 多少 次 6 ， 结果 得 0 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10437", "content": "刘 叔叔 带 700 元 钱 买 化肥 ， 买 了 16 袋 化肥 ， 剩 60 元 ， 每 袋 化肥 的 价钱 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10464", "content": "光明 小学 五年级 有 180 名 学生 ， 六年级 学生 人数 是 五年级 的 (5/6) ， 又 是 全校 人数 的 (2/11) ， 光明 小学 全校 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10474", "content": "一 个 球拍 的 价格 是 43.56 元 ， 足球 的 价格 是 球拍 的 1.5 倍 多 2 元 ， 一个 足球 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10505", "content": "王师傅 9 月份 的 工资 是 3200 元 ， 按照 个人所得税法 规定 ， 个人 的 月 收入 超过 3000 元 的 部分 ， 应 按照 5% 的 税率 征收 个人所得税 ． 王师傅 这个 月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10529", "content": "甲 、 乙 两队 一起 检修 一条 公路 ， 共用 7 天 检修 完 ． 甲队 检修 了 840 米 ， 乙 队 检修 了 1050 米 ， 甲队 比 乙 队 平均 每天 少 检修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10565", "content": "计算 ： 32 / (16/25) * 5 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10589", "content": "春 松 果园 有 梨树 460 棵 ， 苹果树 比 梨树 多 25% ， 果园 里 有 苹果树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10590", "content": "学校 李老师 带 8750 元 去 购买 体育用品 ， 其中 买 篮球 用 去 (2/5) ， 买 排球 用 去 (3/7) ， 其余 的 买 足球 ． 买 足球 用 了 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10632", "content": "一 个 街心花园 占地 (5/8) 公顷 ， 其中 草坪 占 (2/5) ， 花圃 占地 (1/8) 公顷 ， 其余 的 是 人行道 ． 人行道 的 面积 = 多少 公顷 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10640", "content": "一 辆 公共汽车 出发 时 ， 车上 有 12 个 乘客 ， 到 了 第一站 ， 下去 了 2 个 乘客 ， 上来 了 6 个 乘客 ； 到 了 第 二 站 ， 下去 了 3 个 乘客 ， 上来 了 4 个 乘客 ， 这时 车上 共有 多少 个 乘客 ？", "knowledge": ["+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "10654", "content": "张 叔叔 在 书店 买 了 两本书 ． 一本 28.5 元 ， 另 一本 14.4 元 ． 他 付出 50 元 ， 应 找回 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10667", "content": "一 批 煤 用 去 25% ， 还 剩 48 吨 ， 这 批 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10684", "content": "有 一列 火车 以 每 小时 140 千米 的 速度 离开 洛杉矶 直奔 纽约 ， 同时 ， 另 一辆 火车 以 每 小时 160 千米 的 速度 从 纽约 开往 洛杉矶 ． 如果 有 一只 鸟 以 每 小时 30 千米 的 速度 和 两列 火车 同时 启动 ， 从 洛杉矶 出发 ， 碰到 另 一列 火车 后 返回 ， 往返 在 两列 火车 之间 ， 直到 两列 火车 相遇 为止 ． 已知 洛杉矶 到 纽约 的 铁路 长 4500 千米 ， 请问 ： 这 只 小鸟 飞行 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10707", "content": "学校 在 小 红 和 小 明 两家 之间 的 一段 公路 边 ． 放学 后 ， 两 人 同时 向 各自 家里 走 去 ． 小 明 每 小时 走 (18/5) 千米 ， 小 红 每 小时 走 3 千米 ， (5/12) 小时 后 两 人 同时 到 家 ． 两家 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10725", "content": "某市 500 名 外语 教师 ， 懂 英语 或 德语 ， 其中 懂 英语 的 有 375 人 ， 既 懂 英语 又 懂 德语 的 有 100 人 ， 那么 懂 德语 的 教师 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10750", "content": "一 个数 除以 23 商 15 余 21 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10758", "content": "在 一块 长 18 米 ， 宽 12 米 的 长方形 果园 里 种 果树 ， 平均 每棵 占地 2 平方米 ， 这块 果园 能 种 果树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10772", "content": "在 道路 的 一侧 植树 ， 每隔 5 米 植 一棵 ， 从 起点 到 终点 共 植 10 棵 ， 这 条 路 有 多少 米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10799", "content": "现在 每件 衣服 的 成本 比 过去 降低 了 20% ， 是 把 多少 看作 单位 “ 1 ” ， 现在 每件 衣服 的 成本 是 过去 的 多少 % ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10838", "content": "同学 们 参加 植树 活动 ． 男生 植 了 40 棵 ， 女生 植 了 50 棵 ． 男生 比 女生 少 植 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10865", "content": "甲 数 的 25% 是 1.25 ， 乙 数 是 60 的 20% ， 乙 数 是 甲 数 的 百分之几 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10867", "content": "新建 一条 高速公路 ， 已 建成 240 千米 ， 剩下 的 比 已 建成 的 2 倍 还 多 8 千米 ， 这 条 新建 的 高速公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "10869", "content": "一 堆 煤 平均 每天 烧 10 吨 可以 烧 18 天 ， 如果 平均 每天 烧 12 吨 ， 可以 烧 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10874", "content": "去年 某校 参加 数学 奥林匹克 竞赛 的 学生 中 ， 女生 占 总数 的 (1/4) ， 今年 全校 参赛 的 学生 增加 了 20% ， 女生 占 总数 的 (1/3) ， 与 去年 相比 ， 今年 参赛 的 女生 人数 增加 了 多少 % ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10910", "content": "特快 列车 1 小时 大约 行 160 千米 ， 12 小时 大约 行 多少 千米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10930", "content": "洛阳 市民 在 隋唐 城 遗址 公园 举行 民间艺术 展 ， 其中 展出 剪纸作品 128 件 ， 比 书法作品 的 (9/11) 少 16 件 ， 这次 共 展出 书法作品 多少 件 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10977", "content": "计算 ： 0.5 - (1/3) + (1/4) = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "10980", "content": "一 个 书架 有 上 、 下 两层 ， 共 放 着 128 本 图书 ． 上 、 下 两层 图书 本 数 的 比 是 5 ： 3 ， 上层 比 下层 多 多少 本 图书 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11029", "content": "甲乙 两地 相距 1500 米 ， 小 红 与 小 明 从 两地 同时 相向 而 行 ， 10 分钟 后 相遇 ． 小 红 每分钟 走 70 米 ， 小 明 每分钟 走 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11060", "content": "一 本 280 页 的 故事书 ， 小 红 第一天 看 了 20% ， 第 二 天 看 了 30% ， 还 剩 多少 页 没 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11061", "content": "(6/5) 吨 化肥 平均 分成 3 份 ， 每份 应该 = 多少 吨 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11062", "content": "甲乙 两辆 汽车 同时 从 车站 向 相反 方向 开出 ， 8 小时 后 ， 甲 车 与 乙 车 相距 920 千米 ， 已知 甲 车 每 小时 行 55 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11078", "content": "学校 六年级 栽 432 棵 树 ， 其中 48 棵 是 杨树 ， 其余 是 柳树 ， 栽 的 柳树 是 杨树 的 几倍 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11081", "content": "平行四边形 面积 是 72 平方米 ， 高 6 米 ， 它 的 底边 长 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11132", "content": "一 个 加数 是 3.89 ， 和 是 5.21 ， 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11135", "content": "小 华 有 的 钱 可以 买 6 个 蓝球 、 16 个 足球 ， 或 买 9 个 蓝球 ． 现在 小 华 把 这些 钱 全部 买 了 足球 ， 送给 贫困山区 小朋友 ． 小 华 共 买 了 足球 多少 个 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11165", "content": "甲 、 乙 两桶 水 同样 重 ， 如果 从 乙 桶 中 倒 25 千克 水 到 甲 桶 中 ， 则 甲 桶 的 水 的 千克 数 是 乙 桶 的 6 倍 ， 甲 桶 原来 有 多少 千克 水 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11169", "content": "王 村 今年 生产 棉花 250 吨 ， 今年 比 去年 多 生产 50 吨 ， 今年 比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11202", "content": "甲 、 乙 、 丙 3 人行路 ， 甲 每分钟 走 60 米 ， 乙 每分钟 走 50 米 ， 丙 每分钟 走 40 米 ． 甲 从 a 地 ， 乙 和 丙 从 b 地 同时 出发 相向 而 行 ， 甲 和 乙 相遇 后 ， 过 了 15 分钟 又 与 丙 相遇 ， 求 a 、 b 两地 间 的 距离 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "11204", "content": "多少 米 的 (2/5) 是 16 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11213", "content": "有 两捆 粗细 相同 的 铁丝 ， 其中 一捆 铁丝 长 8 米 ， 重 400 千克 ， 另 一捆 铁丝 重 200 千克 ， 这 捆 铁丝 长 多少 米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11214", "content": "“ 全球通 ” 手机 月租费 30 元 ， 通话费 0.3 元 / 分 ． 如果 某人 每月 的 手机费 不会 超过 60 元 ， 那么 他 每月 最 多 可以 打电话 多少 分钟 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11231", "content": "小 王 6 月份 稿费 收入 5000 元 ， 按规定 超过 1500 元 的 部分 要 缴纳 20% 的 个人所得税 ， 小 王 税后 的 收入 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11242", "content": "某 工厂 准备 买 一套 20 万元 的 设备 ， 实际 节约 了 15% ， 节约 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11258", "content": "王 叔叔 的 3 轮 车上 装 了 26 袋 同样 的 大米 ， 连 车 共 重 1000 千克 ． 中途 卸下 6 袋 大米 ， 这时 连 车 重 820 千克 ． 每 袋 大米 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11276", "content": "果园 里 桃树 的 棵 树 是 梨树 的 2 倍 ， 苹果树 比 桃树 多 了 111 棵 ． 苹果树 有 147 棵 ， 3 种树 共有 多少 棵 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "11292", "content": "乐乐 要 打 一篇 320 字 的 文章 ， 乐乐 的 打字速度 是 每分钟 45 个 ， 打 了 5 分钟 后 ， 这 篇文章 还 剩 多少 字 没 打 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11294", "content": "一 个数 加上 它 的 (9/20) 等于 58 ， 这个 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11334", "content": "班长 把 全班 50 个 学生 的 学习 与 巩固 收集 后 摞 成 了 一个 长 26 cm ， 宽 18 cm ， 高 25 cm 的 长方体 ， 计算 每 本 的 体积 = 多少 立方厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11350", "content": "一年级 有 学生 125 人 ， 比 二年级 少 20 人 ． 两个 年级 一共 有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11417", "content": "大西洋 平均 深度 为 3.62 千米 ， 印度洋 平均 深度 比 它 深 0.27 千米 ， 太平洋 平均 深度 比 印度洋 深 0.13 千米 ， 太平洋 平均 深度 是 （ 多少 ） 千米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11429", "content": "0.12 与 80 的 积 除以 一个 数 ， 商 是 0.5 ， 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11446", "content": "一 根 绳子 ， 用 去 (1/3) 后 又 接上 16 米 ， 这时 比 原来 长 (1/5) ． 这根 绳子 原来 = 多少 米 长 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11450", "content": "某 小学 一 、 二年级 共有 学生 150 人 ， 正好 是 全校 人数 的 (1/6) ． 全校 女生 占 总 人数 的 40% ， 全校 男生 有 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11476", "content": "晶晶 和 玲玲 的 家 分别 在 在 体育场 的 东面 和 西面 ． 星期天 上午 她们 相约 去 锻炼 ． 两 人 同时 出发 ， 晶晶 每 分 走 80 米 ， 玲玲 每 分 走 75 米 ， 经过 4 分 两 人 在 体育场 门口 会面 了 ． 她们 两家 之间 相距 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11509", "content": "张老师 编写 的 《 童话故事 》 在 出版社 出版 后 ， 得到 稿费 1800 元 ． 按照 个人所得税 计算 办法 ， 稿费 扣除 800 元 后 按 14% 缴税 ． 张老师 实 得 稿费 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11528", "content": "一 艘 轮船 从 重庆 开往 上海 有 960 位 客人 ， 到 武汉 港 有 179 人 下船 ， 又 有 213 人 上船 ， 这时 轮船 上 还有 多少 客人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11538", "content": "学校 买来 126 米 塑料绳 ， 每 18 米 做 10 根 跳绳 ， 照 这样 计算 ， 能 做 多少 根 跳绳 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11541", "content": "一 个 圆柱 的 侧 面积 是 12.56 平方米 ， 底面 半径 是 2 分 米 ， 它 的 高 = 多少 分 米 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11573", "content": "广源 畜牧 公司 饲养 的 奶牛 是 奶羊 的 7 倍 ． 奶牛 和 奶羊 一共 有 48 只 ， 广源 公司 养 了 多少 只 奶羊 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11602", "content": "学校 规定 每个 学生 至少 参加 语文 兴趣小组 和 数学 兴趣小组 中 的 一个 ， 204 班 有 45 人 ， 参加 语文 兴趣小组 的 有 30 人 ， 参加 数学 兴趣小组 的 有 22 人 ， 语文 和 数学 兴趣小组 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11644", "content": "比 37 的 25 倍 多 16 的 数 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11657", "content": "益民 小学 植树 180 棵 ． 其中 (1/5) 是 五年级 种 的 ， (1/4) 是 四年级 种 的 ， 四年级 比 五年级 多 植 了 多少 棵 树 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11659", "content": "4 、 五年级 要 栽 220 棵 树 ． 四年级 有 3 个 班 ， 每班 栽 28 棵 ， 剩下 的 分给 五年级 4 个 班 栽 ， 平均 每班 栽 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11665", "content": "商店 进 了 360 套 童装 ， 第一周 卖 了 95 套 ， 第 二 周 卖 了 108 套 ， 现在 比 原来 少 了 多少 套 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11683", "content": "一 个数 的 (3/4) 是 (12/21) ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11718", "content": "9.1 / 7 的 商 加上 3.8 * 5 的 积 ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11727", "content": "多少 除以 3 得 10 余 2 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11767", "content": "某 工地 上午 运走 水泥 25% ， 下午 比 上午 多 运走 10.5 吨 ， 这 批 水泥 还 剩下 24.5 吨 ， 那么 这 批 水泥 共有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11790", "content": "小 王 重 36.5 千克 ， 小 李 重 41.4 千克 ， 一个 相扑 运动员 的 体重 是 125.8 千克 ， 这个 运动员 的 体重 比 小 王 ， 小 李 两 人 的 体重 和 还要 重 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11792", "content": "在 学校 运动会 开幕式 上 进行 大型 团体操 表演 ， 开始 有 15 行 ， 每行 12 人 ， 变阵 后 每行 有 9 行 ， 这时 每行 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11849", "content": "在 铁路 的 旁边 ， 每隔 60 米 安装 电杆 一根 ， 一位 旅客 在 行进 中 的 火车 内 ， 5 分钟 经过 电杆 75 根 ． 求 此 火车 每分钟 的 速度 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11873", "content": "甲 、 乙 两列 火车 分别 从 相距 822 千米 的 两地 同时 相向 而 行 ， 甲 每 小时 行 65 千米 ， 乙 每 小时 行 72 千米 ， 几小时 后 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11879", "content": "为了 学生 的 卫生 安全 ， 学校 给 每个 学生 配 一个 水杯 ， 每 只 水杯 3 元 ， 正好 超市 打 0.9 ， 学校 想 买 180 只 水杯 ， 请 你 算 一下 一共 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11894", "content": "甲 、 乙 两队 去 修路 ， 甲队 完成 总 工程 的 (4/15) ， 乙 队 比 甲队 多 完成 这项 工程 的 (2/15) ， 两队 一共 完成 了 总 工程 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11925", "content": "5 （ 1 ） 班 学生 去 老区 参观 ， 共用 去 10 小时 ， 其中 路上 用 去 的 时间 占 (1/5) ， 吃 午餐 与 休息时间 共 占 (3/8) ， 剩下 是 浏览 的 时间 ， 浏览 的 时间 占 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11936", "content": "一 电影院 11 月份 的 收入 是 20 万元 ， 缴税 后 剩余 19 万元 ． 请问 税率 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11942", "content": "两个 加数 的 和 是 420 ， 其中 一个 加数 是 162 ， 另 一个 加数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "11945", "content": "多少 千米 是 630 千米 的 (4/9) ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11954", "content": "王师傅 8 分钟 做 1 个 零件 ， 平均 每分钟 做 多少 个 零件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11957", "content": "食堂 买来 面粉 200 千克 ， 吃 了 5 天 ， 每天 吃 35 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11959", "content": "学校 合唱组 人数 是 美术组 的 (7/8) ， 书法 组 人数 是 合唱组 的 (3/4) ， 已知 美术组 有 32 人 ， 书法 组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11982", "content": "一 种 书 如果 每 本 按 50 元 出售 ， 可 盈利 25% ； 若想 盈利 40% ， 那么 每 本 应 按 多少 元 出售 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11985", "content": "元旦节 ， 刘老师 为 本班 学生 购买 演出 用 的 服装 ， 买 5 件 女生 装 和 8 件 男生 装 的 钱 同样 多 ． 每件 男生 装 39 元 ， 每件 女生 装 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12008", "content": "小 杰 每分钟 打 135 个 字 ， 他 打 一篇 文章 用 了 28 分钟 ， 还有 650 个 字 没有 打 完 ， 这 篇文章 有 多少 个 字 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12013", "content": "找 规律 ： 1 、 3 、 4 、 7 、 11 、 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12042", "content": "筑路 队 铺 一条 公路 ， 第一周 铺 了 全长 的 (1/8) ， 第 二 周 铺 了 900 米 ， 还 剩 4700 米 没有 铺 ． 这 条 公路 全长 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12053", "content": "两个 工程队 合作 完成 一项 工程 ， 甲队 每天 完成 全 工程 的 (3/5) ， 乙 队 每天 完成 全 工程 的 (1/4) ． 两队 合作 一天 ， 还 剩 全 工程 的 几分 之 几 没有 完成 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12069", "content": "某校 六年级 学生 人数 为 150 人 ， 占 全校学生 总数 的 20% ， 五年级 学生 人数 占 全校学生 总数 的 10% ， 五年级 有 学生 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12072", "content": "在 一次 义卖 活动 中 ， 王 刚 卖 柠檬水 和 热 巧克力 共 400 杯 ， 得 款 546 元 ． 如果 柠檬水 1 元 / 杯 ， 热 巧克力 2 元 / 杯 ， 那么 王 刚 在 这次 义卖 活动 中 卖出 了 多少 杯 柠檬水 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12075", "content": "有 一桶 油 ， 第一次 取出 30% ， 第 二 次 取出 的 比 第一次 多 (1/5) 千克 ， 桶 里 还 剩 3.8 千克 ， 这 桶 油 重 多少 千克 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12115", "content": "水果店 运 来 水果 36 箱 ， 每箱 重 15 千克 ． 卖出 285 千克 后 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12119", "content": "老人院 的 李 玉 老人 过生日 ， 义工 邀请 院里 的 老人 和 职工 一共 48 人为 老人 庆生 ， 义工 要 给 每人 准备 一瓶 矿泉水 和 一个 苹果 ． 已知 矿泉水 每瓶 2 元 ， 苹果 每个 2.5 元 ， 义工 至少 要 带 多少 钱 才 够 用于 采购 ？", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "12148", "content": "学校 组织 献爱心 活动 ． 五年级 捐款 312 元 ， 六年级 比 五年级 多 捐 (1/8) ， 六年级 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12149", "content": "(5/8) 的 (4/3) 倍 + (1/6) ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12186", "content": "甲 、 乙 两 数 的 最大 公因数 是 25 ， 最小 公倍数 是 150 ， 若 甲 是 75 ， 乙 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12203", "content": "某 商店 按 定价 出售 ， 每个 可 获利 50 元 ． 如果 按 定价 的 50% 出售 10 件 ， 则 与 按 定价 每个 减价 30 元 出售 12 件 所 获 利润 一样 多 ． 这种 商品 每件 定价 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "12215", "content": "一 块 三角形 的 广告牌 ， 底 长 2.4 m ， 高 是 1.2 m ， 它 的 面积 = 多少 m ^ 2 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12256", "content": "一 件 衣服 降价 20% 后 是 120 元 ， 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12285", "content": "小 明 和 小 刚 家 相距 1240 米 ． 一天 ， 两 人 约定 在 两家 之间 的 路上 会合 ． 小 明 每分钟 走 75 米 ， 比 小 刚 的 速度慢 (1/16) ． 两 人 同时 从 家 出发 ， 多长时间 后 能 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12323", "content": "一 根 绳子 长 (4/5) 米 ， 剪 去 全长 的 (3/4) ， 还 剩下 全长 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12335", "content": "某 电视机厂 计划 5 月份 生产 5000 台 电视机 ， 实际上 半月 完成 计划 的 60% ， 下半月 完成 计划 的 (7/10) ， 这个 月 超产 完成 多少 台 电视机 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "12348", "content": "某 牧民 养羊 450 只 ， 其中 (3/5) 是 山羊 ． 现在 又 买 回 10 只 山羊 ， 现在 山羊 占 几分 之 几 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12349", "content": "李经理 一个月 的 工资 是 3600 元 ， 按规定 ， 减去 2000 元 后 的 部分 按 5% 的 税率 缴纳 个人所得税 ， 他 每月 应 缴纳 的 个人所得税 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12372", "content": "一 辆 货车 和 一辆 客车 从 相距 545 千米 的 甲乙 两地 相对 而 行 ． 客车 先 行驶 2 小时 后 货车 才 出发 ， 再 过 3 小时 两车 相遇 ． 已知 货车 每 小时 行 65 千米 ， 客车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12387", "content": "商店 里 有 25 套 儿童服装 ， 原价 每套 87 元 ． 实际 每套 只 卖 63 元 ． 这样 卖完 这些 儿童服装 ， 一共 比 原来 少卖 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12421", "content": "某 化肥厂 今年 生产 化肥 1500 吨 ， 比 去年 多 生产 300 吨 ， 今年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12465", "content": "有 12 个 △ ， △ 的 个数 是 ○ 的 2 倍 ， ○ 有 多少 个 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12472", "content": "24 比 多少 多 (1/3) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12474", "content": "水果店 原有 橘子 的 重量 比 苹果 多 100 千克 ． 橘子 卖出 (1/3) 后 ， 苹果 的 重量 比 橘子 多 25 千克 ． 水果店 有 橘子 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12505", "content": "一 个 正方体 木块 ， 它 的 棱 长 是 5 分 米 ， 已知 每 立方分米 重 0.4 千克 ， 这个 木块 重 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "12514", "content": "5 、 六年级 同学 参加 植树 活动 ， 六年级 植树 150 棵 ， 五年级 植树 的 棵 数 是 六年级 的 (4/5) ， 五年级 同学 植树 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12537", "content": "一 块 地 用 拖拉机 来 耕 ， 45 分钟 耕 了 (11/6) 公顷 ， 相当于 这块 地 总面积 的 (11/21) ， 这块 地 有 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12567", "content": "一 个 修路 队 ， 第一天 修 了 全长 的 (2/15) ， 第 二 天 修 了 第一天 的 (1/2) ， 这时 还有 1800 米 就 到 这 条 路 的 中 点 处 ， 求 这 条 路 有 多长 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12577", "content": "学校 买 了 8 盒 羽毛球 ， 每盒 有 4 袋 ， 每 袋 有 12 个 羽毛球 民 ． 一共 买 了 多少 个 羽毛球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12587", "content": "100 克 浓度 为 15% 的 盐水 中 ， 放进 8 克 盐 ， 若 要 使 其 浓度 变成 20% ， 还要 再 加多少 克 水 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12602", "content": "制 伞 厂 要 生产 5000 把 雨伞 ， 已经 生产 了 12 天 ， 还 剩 2120 把 没 完成 ， 平均 每天 生产 多少 把 雨伞 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12643", "content": "4 （ 3 ） 班 的 图书 角 共 放 有 图书 210 本 ， 第一天 借出 了 总数 的 (1/7) ， 第 二 天 借出 了 总数 的 (2/21) ． 两天 一共 借出 了 多少 本 图书 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12677", "content": "某 电视机厂 上半年 生产 电视机 40 万台 ， 下半年 生产 比 上半年 多 (1/8) ， 下半年 生产 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12691", "content": "某校 已 招收 一年 级新生 315 人 ， 其中 女生 占 20% ， 计划 再 招 一批 女生 ， 使 女生 占 全体 新生 的 30% ， 计划 再 招 女生 多少 人 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12775", "content": "学校 运 来 白色 粉笔 225 箱 ， 彩色 粉笔 36 箱 ， 如果 每箱 粉笔 都 装 45 盒 ， 运 来 的 白色 粉笔 和 彩色 粉笔 一共 有 多少 盒 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12797", "content": "妈妈 今年 35 岁 ， 小 明 今年 8 岁 ， 5 年 以后 ， 妈妈 比 小 明 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "12802", "content": "一 个 卷烟厂 上个月 香烟 销售额 为 2600 万元 ． 如果 按 销售额 的 5% 缴纳 消费税 ， 上 月 应 缴纳 消费 税款 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12813", "content": "果园 里 有 9 棵 苹果树 ， 7 棵 梨树 ． 每棵 苹果树 大约 摘 160 千克 苹果 ， 这个 果园 大约 摘 多少 千克 苹果 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12826", "content": "一 辆 汽车 从 甲地 到 乙地 ， 行 了 全程 的 (4/5) ， 在 剩下 的 路程 中 ， 70% 是 上坡路 ， 其余 是 下坡路 ． 已知 下坡路 长 3 千米 ， 甲 、 乙 两地 相距 多 远 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12831", "content": "一 批 零件 ， 已 生产 (2/3) 再生产 80 个 就 超额完成 (1/5) ， 这 批 零件 有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12837", "content": "把 一个 棱 长 为 5 分 米 的 正方体 钢材 锻造 成 一个 宽 2.5 分 米 ， 高 2 分 米 的 长方体 钢 块 ， 能 锻造 多长 ？", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12855", "content": "妈妈 用 20% 的 钱 买 了 一件 180 元 的 衣服 ， 妈妈 原来 有 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12868", "content": "某班 有 学生 48 人 ， 女生 占 全班 的 37.5% ， 后来 又 转 来 女生 若干 人 ， 这时 人数 恰好 是 占 全班 人数 的 40% ， 问 转 来 几名 女生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12878", "content": "一 个 合数 的 质因数 是 2 和 3 ， 这个 合数 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12894", "content": "一 个数 除以 23 ， 商 是 18 ， 余数 是 20 ， 这个 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12899", "content": "李 阿姨 准备 购买 一套 住房 ， 如果 分期付款 要 多付 10% ， 如果 用 现金 付款 可以 优惠 5% ， 李 阿姨 计算 了 一下 ， 两种 付款 方式 的 差价 是 15000 元 ． 这 套 住房 原价 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12906", "content": "阳光 小学 去年 有 小学生 1800 人 ， 今年 比 去年 减少 了 8% ， 今年 有 小学生 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12922", "content": "配置 一种 盐水 ， 盐 和 水 的 质量 比 是 1 ﹕ 15 ， 盐 占 盐水 质量 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12936", "content": "一 个 圆柱体 ， 底面 周长 是 94.2 厘米 ， 高 是 25 厘米 ， 它 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12969", "content": "一 个数 的 75% 是 30 ， 这个 数 的 20% = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12988", "content": "电视机厂 今年 生产 电视机 36000 台 ， 比 去年 多 生产 (1/4) ， 去年 生产 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12994", "content": "一 种 服装 原价 96 元 ， 现在 降价 (3/8) ， 现在 的 售价 = 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13009", "content": "印刷 车间 要 装订 1314 套书 ， 已经 订 了 14 天 ， 还 剩 362 套 没 完成 ， 平均 每天 订 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13141", "content": "某 商店 2 月份 的 营业额 是 8000 元 ， 按规定 营业额 的 5% 纳税 ， 应 纳税 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13162", "content": "育英 中学 3 个 年级 共 18 个 班 ， 全校师生 1100 人 ， 教师 92 人 ， 平均 每班 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13163", "content": "南京 地铁 一期 工程 分 高架 线 和 地下 线 两 部分 ， 其中 高架 线 长 约 6.5 千米 ， 地下 线 是 高架 线 的 1.6 倍 ， 第一期 工程 全线 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13206", "content": "师徒 加工 一批 零件 ， 徒弟 已经 加工 了 总数 的 20% ， 师傅 加工 了 总数 的 (1/3) ． 这时 师傅 比 徒弟 多 加工 80 个 ， 这 批 零件 一共 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13213", "content": "停车场 有 面包车 32 辆 ， 小轿车 的 辆数 比 面包车 的 4 倍 少 19 辆 ． 小轿车 有 多少 辆 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13217", "content": "某 饭店 十 月份 的 营业额 为 250000 元 ， 税率 是 5% ， 营业税 应 缴 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13229", "content": "一 座 桥 长 2400 米 ， 一列 火车 以 每秒 20 米 的 速度 通过 这 座 桥 ， 火车 车身 长 200 米 ， 则 火车 从 上 桥 到 车 尾巴 离开 桥 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13275", "content": "一 个 装订 小组 要 装订 1820 本书 ， 4.5 小时 装订 了 315 本 ． 照 这样 计算 ， 剩下 的 书 还 需要 多少 小时 才能 装订 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13295", "content": "一 个数 的 2.1 倍 是 7.77 ， 这个 数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13309", "content": "501 班 有 学生 42 人 ， 其中 男生 有 25 人 ， 女生 人数 是 全班 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13367", "content": "一 台 彩电 现在 的 售价 是 1480 元 ， 比 原来 降低 了 120 元 ， 现在 的 售价 是 原价 的 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13376", "content": "一 本 故事书 有 240 页 ， 比 一本 科技 书 少 25% ， 这本 科技 书 = 多少 页 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13381", "content": "李 大爷 把 一根 6 米 长 的 竹竿 垂直 插入 鱼塘 中 ， 竹竿 的 入 泥 部分 是 1.5 米 ， 露出 水面 的 部分 是 1.24 米 ， 这个 鱼塘 水深 多少 米 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13439", "content": "山羊 有 60 只 ， 绵羊 比 山羊 多 80% ， 绵羊 有 多少 只 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13450", "content": "一 列 火车 从 泰山 到 青岛 以 平均 每 小时 85 千米 的 速度 行驶 ， 需 5.6 小时 到达 ． 提速 后 ， 只 需 3.4 小时 就 能 到达 ． 提速 后 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13466", "content": "某 商场 元旦 大 酬宾 ， 标价 40 元 童装 ， 按 标价 的 (4/5) 出售 ， 售价 = 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13490", "content": "有 一摞 纸 ， 共有 120 张 ． 第一次 用 了 它 的 (3/5) ， 第 二 次 用 了 它 的 (1/6) ， 两次 一 共用 了 多少 张 纸 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13501", "content": "37 与 23 的 和 ， 乘 3.6 与 2.8 的 差 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13544", "content": "用 边长 0.6 米 的 方砖 铺 54 平方米 的 地面 ， 需要 多少 块 这样 的 方砖 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13552", "content": "王 康 同学 买 4 本 日记本 用 了 48 元 ， 他 还 想 买 8 本 送给 他 的 好 朋友 们 ， 需要 准备 多少 钱 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13573", "content": "甲 数 是 14.6 ， 乙 数 比 甲 数 的 3 倍 少 8.2 ， 乙 数 比 甲 数多 多少 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13635", "content": "我们 学校 美术 小组 有 24 人 ， 摄影 小组 人数 是 美术 小组 的 (1/2) ， 航模 小组 的 人数 是 摄影 小组 的 (5/6) ， 航模 小组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13680", "content": "某 小学 三年级 有 学生 145 人 ， 四年级 有 学生 155 人 ， 学校 要 为 这 两个 年级 的 学生 每人 发 4 个 桃子 ． 一共 要 发 多少 个 桃子 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13691", "content": "一 个 图书馆 有 24 个 同样 的 书架 ， 每个 书架 有 4 层 ， 每层 放 240 本书 ． 这些 书架 一共 能 放 多少 本书 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13693", "content": "学校 田径队 有 男队员 35 人 ， 女队员 21 人 ． 如果 把 它们 平均 分成 4 个 小组 进行 训练 ， 每个 小组 有 多少 队员 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13741", "content": "甲 、 乙 两车 从 相距 450 千米 的 两地 相向 开出 ， 4.5 小时 相遇 ． 已知 甲 车 每 小时 行 54 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13746", "content": "甲乙 两地 相距 406 公里 ， 一辆 汽车 从 甲地 开往 乙地 ， 4 小时 行驶 了 180 公里 ． 照 这样 的 速度 再 行驶 多少 小时 这辆 汽车 就 可以 到达 乙地 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13792", "content": "6 （ 2 ） 班 图书 角 有 故事书 36 本 ， 漫画书 比 故事书 多 (1/3) ， 漫画书 有 多少 本 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13807", "content": "农资 公司 要 运 250 吨 化肥 到 农村 ， 其中 60% 用 船运 ， 其余 的 用 卡车 运 ． 用 船运 的 比 用 卡车 运 的 多 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13810", "content": "红旗 小学 今年 招收新生 240 人 ， 比 原 计划 多 招收 (1/5) ， 原 计划 招生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13814", "content": "从 9500 / 19 的 商 里面 减去 36 * 12 的 积 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13861", "content": "胜利 小学 有 学生 1200 人 ， 某 一天 的 出勤率 是 99.5% ． 这天 有 多少 人 没有 到校 读书 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13907", "content": "一 本书 售价 36 元 ， 利润 是 成本 的 20% ， 成本 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13945", "content": "商店 共运 来 470 个 玩具 熊 ， 已经 卖出 348 个 ， 每个 23 元 ， 剩下 的 每个 卖 17 元 ， 一共 可以 收入 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "13947", "content": "挖 一条 长 400 米 的 水渠 ， 已经 挖 了 全长 的 (3/5) ， 还 剩 多少 米 没 挖 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "13982", "content": "放假 乘火车 去 奶奶家 要 用 16 小时 ． 现在 火车 提速 了 ， 14 小时 就 能 到 ． 现在 乘火车 去 奶奶家 的 时间 比 原来 节省 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13992", "content": "小 明 的 爸爸 发表 了 一篇 文章 ， 获得 稿酬 1200 元 ． 按规定 ， 稿酬 收入 超过 800 元 的 部分 按 14% 的 税率 缴纳 个人所得税 ． 小 明 的 爸爸 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14014", "content": "学学 看到 太上老君 正在 用 一根 绳子 拴 宝 葫芦 ， 第一次 用 去 全长 的 一半 还 多 2 米 ， 第 二 次 用 去 余下 的 一半 少 10 米 ， 第 3 次 用 去 15 米 ， 最后 还 剩 9 米 ， 那么 这根 绳子 原来 有 多少 米 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "14058", "content": "学校 买 回 25 箱 墨水 ， 每箱 36 瓶 ， 每瓶 4.8 元 ． 一共 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14069", "content": "小 军 读 一本 故事书 ， 第一天 共 读 42 页 ， 第 二 天 共 读 了 43 页 ， 还 余下 全书 的 83% 没有 读 ， 这本 故事书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14076", "content": "胜利 小学 为 贫困地区 捐款 3750.8 元 ， 比 红旗 小学 少 52.2 元 ， 两所 学校 共 捐款 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14100", "content": "甲 数 比 乙 数 的 (4/5) 还 少 20 ， 已知 甲 数 是 40 ， 乙 数 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14117", "content": "某 化肥厂 去年 生产 化肥 6000 吨 ， 今年 比 去年 增产 20% ， 今年 增产 多少 吨 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14126", "content": "同学 们 参加 爬山 比赛 ， 女同学 分成 了 4 组 ， 每组 有 15 人 ． 参赛 的 男同学 有 76 名 ， 一共 有 多少 名 同学 参加 爬山 比赛 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14142", "content": "一 根 绳子 长 20 米 ， 剪 去 多少 米 后 ， 剩下 的 占 全长 的 40% ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14143", "content": "一 台 洗衣机 的 原价 是 1250 元 ， 实际 售价 为 1200 元 ， 实际 售价 比 原价 降低 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14179", "content": "把 一根 25 米 长 的 水管 锯 成 5 段 ， 每 锯 一次 用 8 分钟 ， 一共 需要 多少 分钟 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14217", "content": "一 个数 是 8 ， 另 一个 数 是 840 ， 积 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14235", "content": "淘气 生日 时 ， 妈妈 送给 他 一个 圆锥形 的 陀螺 ， 陀螺 的 底面 直径 是 6 厘米 ， 高 5 厘米 ， 如果 妈妈 要 把 它 装 在 一个 长方体 盒子 中 ， 这个 盒子 的 容积 至少 = 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14281", "content": "多少 - 278 = 192 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14314", "content": "一 辆 客车 从 甲地 到 乙地 ， 计划 要 8 小时 ， 实际 时间 比 计划 少 用 (1/16) ， 实际 用 了 多少 小时 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14332", "content": "一 件 原价 90 元 的 商品 打 0.9 出售 ， 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14335", "content": "要 挖 一条 全长 120 米 的 水渠 ， 前 8 天 平均 每天 挖 10.5 米 ， 剩下 的 每天 挖 12 米 ， 还 需 几天 挖 完 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14341", "content": "一 个 因数 是 60 ， 另 一个 因数 是 88 ， 他们 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14343", "content": "一 项 工程 25 人 15 天 可以 完成 ， 如果 每人 的 工作效率 不变 ， 工作人员 减少 5 人 ， 需要 多少 天 可以 完成 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14372", "content": "商场 运 来 一批 衣服 ， 一共 460 件 ， 进价 每件 75 元 ， 零售价 每件 96 元 ， 如果 这 一批 衣服 全部 卖完 ， 这家 商场 可以 赚 多少 元 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14404", "content": "甲 、 乙 两站 相距 246 千米 ， a 、 b 两辆 汽车 分别 从 甲 站 、 乙 站 同时 相向 开出 1.5 小时 后 相遇 ． a 汽车 的 速度 是 89 千米 / 小时 ， b 汽车 的 速度 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14444", "content": "同学 们 要 折 120 只 纸鹤 ， 每人 折 5 只 ， 每个 小组 有 12 人 ， 需要 几个 小组 才能 完成 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14461", "content": "某 工人 要 加工 一批 零件 ， 已 加工 了 这 批 零件 的 (3/5) ， 还 剩下 120 个 没 加工 ， 这 批 零件 共 几个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14524", "content": "映山红 剧院 分 4 个 区 ， 每个 区 有 20 排座位 ， 每排 有 25 个 座位 ． 剧院 里 一共 能 坐 多少 人 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14531", "content": "王老师 以 每股 10 元 的 价格 购进 某种 股票 5000 股 ， 过 了 一段时间 后 以 每股 12 元 卖出 ， 按规定 买卖 股票 都 要 按 买卖 金额 的 0.55% 缴纳 手续费 ， 王老师 这次 买卖 股票 实际 赚 多少 元 ．", "knowledge": ["*", "+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "14552", "content": "红 石 村 小学 分成 6 个 小组 去 浇 树 ， 每组 有 4 人 ， 一共 浇 树 360 棵 ， 平均 每人 浇 树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14575", "content": "小 明 到 商店 去 买 了 一个 9 元 钱 的 文具盒 ， 给 营业员 阿姨 13 元 钱 ， 应 找回 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14580", "content": "小 华 骑车 每分钟 行 290 米 ， 他 从 家 到 学校 共用 16 分钟 ， 小 华 家 离 学校 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14601", "content": "生产 一批 件 ， 原 计划 18 天 完成 ， 实际 每天 生产 600 个 ， 这样 时间 缩短 了 6 天 ． 原 计划 每天 生产 多少 个 零件 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14609", "content": "一 个 养鸡 专业户 ， 今年 养鸡 1250 只 ， 比 去年 增加 了 (1/4) ． 去年 养鸡 多少 只 ？ 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14706", "content": "6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24 = ．", "knowledge": ["+"], "difficulty": 0.8, "length": 19}
-{"question_id": "14731", "content": "爷爷 去 医院 看病 ． 医生 处方 ： 每日 3 次 ， 每次 2 片 ， 一瓶 药 有 90 片 ， 可以 吃 多少 天 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14732", "content": "电动车 厂 前年 生产 80 万辆 电动车 ， 去年 比 前年 增产 25% ． 去年 生产 了 多少 辆 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14752", "content": "某班 今天 的 出勤率 为 92.5% ， 请 病假 2 人 ， 事假 1 人 ， 今天 出勤 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14754", "content": "王大妈 卖 鸡蛋 ， 上午 卖 了 12 千克 ， 下午 卖 了 18 千克 ， 下午 比 上午 多 卖 了 55.2 元 ． 平均 每千克 鸡蛋 卖 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14762", "content": "树上 一共 有 8 只 小鸟 ， 第一次 飞 走 了 1 只 ， 第 二 次 又 飞 走 了 2 只 ， 一共 飞 走 了 多少 只 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14773", "content": "修 一段路 ， 已经 修好 了 75 千米 ， 没 修 的 比 修好 的 2 倍 多 15 千米 ， 这 段 路 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14777", "content": "某 修路 队 修 一条 公路 ， 原 计划 每天 修 300 米 ， 实际 每天 比 原 计划 多 修 12% ， 实际 每天 修 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14847", "content": "有 5 个 同学 投 沙包 ， 老师 如果 发给 每人 2 个 沙包 就 差 1 个 ， 老师 共有 多少 个 沙包 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14855", "content": "妈妈 带 100 元 钱 去 超市 ， 买 了 一袋 14.8 元 的 奶粉 ， 还 买 了 15.2 元 的 猪肉 ， 最后 还 剩 多少 元 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14858", "content": "我国 的 淡水鱼 类 大约 有 700 种 ， 比 海洋 鱼类 少 65% ． 我国 的 海洋 鱼类 大约 有 多少 种 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14874", "content": "学校 购进 面包 76 箱 ， 购进 的 牛奶 是 面包 的 9 倍 ， 学校 购进 的 面包 和 牛奶 一共 有 多少 箱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14903", "content": "小 李 从 家 到 学校 ， 每分钟 走 50 米 ， 7 分钟 走 了 一半 路程 ， 剩下 的 一半 路程 要 5 分钟 走 完 ， 平均 每分钟 要 走 多少 米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14906", "content": "菜 场上 有 342 千克 大白菜 ， 比 胡萝卜 多 16 千克 ， 大白菜 和 胡萝卜 一共 有 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14915", "content": "李 芳 用 彩纸 制作 了 一条 花边 ， 一共 排列 了 100 朵花 ． 每 朵花 的 宽 是 4.5 厘米 ， 每 两朵花 之间 的 距离 是 1.2 厘米 ． 请 算 出 这 条 花边 一共 长 多少 厘米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "14955", "content": "永 红 小学 六年级 学生 参加 课外活动 生物 组 的 有 35 人 ， 参加 微 机组 的 人数 是 生物 组 的 (4/5) ， 又 是 美术组 的 (7/8) ． 美术组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14965", "content": "水果 批发部 要 运进 一批 水果 ， 第一次 运进 总量 的 22% ， 第 二 次 运进 1.5 吨 ， 两次 共 运进 这 批 水果 的 62% ， 这 批 水果 一共 有 多少 吨 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14974", "content": "某 图书馆 的 童话 书 占 图书 总数 的 25% ， 科技 书 占 图书 总数 的 15% ， 童话 书 和 科技 书 共有 230 本 ． 这个 图书馆 共有 图书 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14980", "content": "一 辆 旅游车 3 小时 行驶 了 150 千米 ， 照 这样 的 速度 这辆 旅游车 行驶 了 13 小时 到达 目的地 ， 这辆 旅游车 行驶 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15036", "content": "李 明 有 存款 130 元 ， 王 芳 有 存款 70 元 ， 王 芳 想 赶上 李 明 ， 李 明 每月 存 10 元 ， 王 芳 每次 存 15 元 ， 多少 个 月 后 ， 王 芳 才能 赶上 李 明 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15083", "content": "花生仁 的 出油率 为 38% ， 要 榨 380 千克 花生油 大约 需要 多少 千克 花生仁 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15090", "content": "甲 乙丙 3 人 共同 加工 一批 零件 ， 甲 加工 了 总数 的 40% ， 乙 加工 了 总数 的 (3/8) 还 多 26 个 ， 丙 加工 了 剩下 的 64 个 ． 这 批 零件 一共 有 多少 个 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15092", "content": "商店 运 来 800 只 塑料盒 ， 上午 买 出 (1/4) ， 下午 卖出 (2/5) ． 一天 共 卖出 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15100", "content": "一 头 大象 4 天 吃 320 千克 食物 ， 一只 熊猫 每天 吃 40 千克 食物 ． 大象 每天 吃 的 食物 是 熊猫 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15140", "content": "一 列 火车 长 75 米 ， 每秒 行驶 24 米 ， 30 秒 通过 一条 隧道 ， 这 条 隧道 长 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15141", "content": "小 圆 的 面积 相当于 大圆 的 面积 (2/3) ， 这 两个 圆 的 面积 和 是 100 平方厘米 ， 大圆 的 面积 = 多少 平方厘米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15150", "content": "修 一条 长 4500 米 的 路 ， 已经 修 了 24 天 ， 平均 每天 修 185 米 ． 还 剩下 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15159", "content": "服装厂 加工 一批 服装 ， 前 3 天 加工 了 180 套 ， 照 这样 计算 ， 再 用 15 天 就 能 完成 任务 ， 这 批 服装 共有 多少 套 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15177", "content": "一 辆 汽车 从 a 城 开往 b 城 ， 上午 行驶 3 小时 ， 每 小时 行驶 75 千米 ， 中午 休息 了 1 小时 ， 下午 用 同样 的 速度 又 行驶 了 4 小时 到达 b 城 ， a 、 b 两城 相距 多 远 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15208", "content": "商店 以 每 双 13 元 购进 一批 凉鞋 ， 售价 为 14.8 元 ， 卖 到 剩下 5 双 时 ， 除去 购进 这 批 凉鞋 的 全部 开销 外 还 获利 88 元 ， 这 批 凉鞋 共有 多少 双 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15248", "content": "一 辆 汽车 运 一堆 货物 ， 运走 了 总数 的 35% ， 这时 剩下 的 比 运走 的 还 多 18 吨 ． 原来 这 堆 货物 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15263", "content": "体育馆 有 960 个 皮球 ， 6 个 装 一盒 ， 8 盒装 一箱 ， 这些 皮球 能 装 多少 箱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15318", "content": "爸爸 将 2500 元 存入 银行 ， 整存整取 两年 ， 年利率 为 4% ， 2 年 后 利息 共有 多少 元 ？ 若 利息税 为 20% ， 那么 税后 利息 和 本金 一共 多元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15320", "content": "新建 小学 修建 教学楼 用 去 90 万元 ， 比 计划 节约 了 30 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15323", "content": "张 阿姨 家住 在 郊区 ， 周末 她 从 家 公共汽车 去 华美 电器城 买 电冰箱 ． 去 时 公交车 的 速度 是 60 千米 / 小时 ， 用 了 2 小时 ． 回来 时 用 了 3 小时 ． 她 返回 时 公交车 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15334", "content": "夏日 超市 一天 卖 了 57 箱 杏仁露 和 43 箱 矿泉水 ， 每箱 杏仁露 和 矿泉水 都 是 24 瓶 ． 夏日 超市 一共 卖 了 杏仁露 和 矿泉水 多少 瓶 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15346", "content": "男生 有 24 人 ， 比 女生 少 4% ． 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15377", "content": "某 工地 需要 沙 50 吨 ， 用 一辆 载重 0.5 吨 的 汽车 运 了 5 次 ， 余下 的 改用 一辆 重 2.5 吨 的 汽车 来 运 ， 还要 运 多少 次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15384", "content": "(7/8) * 2.4 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15409", "content": "一 堆 糖果 共 200 块 ， 其中 奶糖 占 这 堆 糖果 的 40% ， 再 加入 多少 块 奶糖 后 ， 奶糖 占 现有 糖果 60% ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15434", "content": "小林 家 的 果园 里 种 了 5 行 桃树 ， 每行 159 棵 ， 又 种 了 586 棵 苹果 ， 桃树 比 苹果 多 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15436", "content": "商场 运 来 6 箱 毛巾 ， 每箱 8 条 ， 一共 卖 了 480 元 ， 平均 每 条 毛巾 卖 了 多少 元 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15464", "content": "一 列 客车 从 东城 开往 西城 ， 行 了 全程 的 (5/8) ， 正好 是 365 千米 ， 东西 两成 之间 的 铁路 长 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15481", "content": "养禽 厂 养 的 鸭 是 鸡 的 (2/3) ， 同时 又 是 鹅 的 (4/5) ， 养 的 鸡 有 2400 只 ， 养 的 鹅 有 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15534", "content": "计算 ： 666 * 778 + 333 * 444 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15553", "content": "3 个 好 朋友 约 好 一起 去 少年宫 玩 ． 他们 各自 从 家 去 到 少年宫 ， 小 明 用 了 (3/4) 小时 ， 小 青 比 小 明 少 用 (1/5) 小时 ， 小 王 比 小 青 多 花 了 (1/10) 小时 ． 小 王 从 家 去 到 少年宫 用 了 多少 时间 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15563", "content": "合唱队 里 有 男生 21 人 ， 比 女生 少 (1/4) ， 合唱队 共有 多少 人 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15573", "content": "做 5 节 底面 直径 是 2 分 米 ， 长 8 分 米 的 圆柱形 通风管 ， 至少 需要 多少 铁皮 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "15583", "content": "从 567 中 连续 减去 7 ， 要 得到 结果 是 0 ， 需 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15599", "content": "体育老师 用 720 元 钱 买 了 18 个 足球 ， 还 买 了 数量 同样 多 的 篮球 花 了 1080 元 ． 每个 篮球 比 每个 足球 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15632", "content": "小花 妈妈 打算 将 20000 元 定期 存入 银行 3 年 ， 如果 按 年利率 3.69% 计算 ， 到期 时 小花 妈妈 实际 的 本息 共有 多少 元 ？ （ 另记 利息税 10% ）", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "15678", "content": "4 个 小朋友 通电话 ， 每 2 人 通 一次 话 ， 一 共通 多少 次 话 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15688", "content": "合唱 小组 的 同学 排队 ， 若 每排 站 24 人 ， 可以 站 8 排 ， 如果 每排 站 6 人 ， 能 站 多少 排 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15740", "content": "希望 小学 6 （ 1 ） 班 男生 人数 的 (2/3) 等于 全班 人数 的 (4/13) ， 该班 有 女生 28 人 ， 男生 有 多少 人 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15748", "content": "小 东 计划 到 周口店 参观 猿人 遗址 ． 如果 他 坐 汽车 以 40 千米 / 小时 的 速度 行驶 ， 那么 比 骑车去 早 到 3 小时 ， 如果 他 以 8 千米 / 小时 的 速度 步行 去 ， 那么 比 骑车 晚 到 5 小时 ， 小 东 的 出发点 到 周口店 有 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15757", "content": "图书馆 科技 书 占 该馆 藏书 的 25% ， 如果 该馆 有 科技 书 1.2 万册 ， 那么 该馆 藏书 多少 万册 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15765", "content": "一 位 老红军 伯伯 准备 用 自己 多年 的 积蓄 9900 元 资助 一批 失学 儿童 返 校园 ， 他 先 拿出 540 元 ， 资助 了 3 名 失学 儿童 ． 照 这样 计算 ， 剩下 的 钱 还 可以 资助 多少 名 失学 儿童 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15793", "content": "食堂 运进 一批 大米 ， 吃掉 (4/5) 吨 ， 比 剩下 的 多 (1/4) 吨 ． 这 批 大米 原有 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15803", "content": "王 飞 同学 2006 年 元旦 把 积攒 的 800 元 零花钱 存入 银行 ， 存 整存整取 一年 ． 准备 到期 后 把 利息 捐赠 给 “ 希望工程 ” ， 支援 贫困地区 的 失学 儿童 ． 如果 年利率 按 3.5% 计算 ， 到期 时 他 可以 捐赠 给 “ 希望工程 ” 多少 元 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "15835", "content": "一 堆 沙子 ， 第一天 运走 总数 的 (1/5) ， 第 二 天 运走 总数 的 (1/4) 还 多 4.5 吨 ， 剩下 12 吨 第 3 天 全部 运 完 ， 这 堆 沙子 一共 有 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15886", "content": "甲 ， 乙 两列 火车 同时 从 a 、 b 两地 相向 而 行 ， 甲 车 平均 每 小时 行驶 120 千米 ， 乙 车 平均 每 小时 行驶 110 千米 ， 3 小时 相遇 ． a 、 b 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15890", "content": "王老师 乘车 从 绍兴 去 杭州 参加 教学活动 ， 客车 已 行 了 33 千米 ， 还 剩 全程 的 (3/4) 没有 行 ． 绍兴 到 杭州 全程 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15892", "content": "修路 队 每天 修路 105 米 ， 已经 修 了 25 天 ， 还 剩 215 米 没有 修 ． 这 条 路 长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15897", "content": "被除数 是 288 ， 商 和 余数 分别 是 2 、 4 ， 求 除数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15901", "content": "学校 建 综合楼 ， 实际 投资 220 万元 ， 节约 了 30 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15917", "content": "(1/5) 的 (5/2) 倍 - (1/12) / (2/3) 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15937", "content": "某 县城 到 省城 的 公路 长 180 千米 ． 一辆 汽车 走 高速公路 的 速度 是 90 千米 / 小时 ， 走 普通 公路 的 速度 是 60 千米 / 小时 ． 从 县城 到 省城 走 高速公路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15948", "content": "小 红 看 一本 小说 ， 第一天 看 了 总 页数 的 25% 少 17 页 ， 第 二 天 看 的 比 总 页数 的 (1/8) 还 多 16 页 ， 还 剩下 61 页 没 看 ， 这本 小说 一共 有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15961", "content": "学校食堂 运进 豆角 120 千克 ， 茄子 是 豆角 的 (3/4) ， 运进 的 茄子 = 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15995", "content": "650 + 11 与 30 的 积 ， 再 除以 35 ， 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16001", "content": "一 支 钢笔 4.5 元 ， 一支 圆珠笔 3.5 元 ， 小 明 买 一支 钢笔 和 一支 圆珠笔 ， 付给 售货员 阿姨 10 元 钱 ， 应 找回 多少 元 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16019", "content": "把 (8/9) 米 长 的 绳子 平均 剪成 4 段 ， 每 段长 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16035", "content": "一 种 生理盐水 重 250 克 ， 含盐 率 是 10% ， 现在 使 含盐 率 提高 到 25% ， 应 加入 多少 克 盐 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16156", "content": "丁丁 的 外婆 有 一个 4 合 院 正在 出租 ， 院子 里 的 大 房 每 月租金 为 2310 元 ， 小房 每 月租金 为 1925 元 ， 且 大 房 比 小房 多 7 平方米 ． 丁丁 想 知道 外婆 的 出租房 每平方米 的 租金 ， 你 能 帮 他 算 一 算 ？ 试一试 ． （ 说明 ： 假设 每平方米 的 租金 一定 ． ）", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16206", "content": "5 星 小学 的 同学 去 参观 博物馆 ， 六年级 去 了 354 人 ， 比 五年级 去 的 人数 的 3 倍 少 了 63 人 ， 五年级 去 了 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16208", "content": "小 明 读 一 本书 ， 已知 他 已 读 的 页数 比 全书 的 20% 多 2 页 ， 没 读 的 页数 比 全书 的 75% 多 10 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16212", "content": "一 块 花布 ， 用 去 (5/8) ， 还 剩 (1/8) 米 ． 这块 花布 有 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16227", "content": "一 根 铁箍 长 11.49 分 米 ， 正好 做成 一个 木桶 的 一道 箍 ． 已知 铁箍 接头处 是 0.5 分 米 ． 这个 木桶 的 外 直径 = 多少 分 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16257", "content": "小春 在 计算 减法 时 ， 把 减数 72 写成 27 ， 得到 的 差 是 176 ， 正确 的 差 应该 = ．", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16273", "content": "每 12 支 水彩笔 要 装 一盒 ， 每 40 盒 要 装 一箱 ， 现在 要 装 5 箱 ， 需要 多少 支 水彩笔 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16277", "content": "五年级 学生 在 校园 里 栽树 ， 一共 栽 了 80 棵 ， 成活 了 75 棵 ． 成活 的 棵 树 占 栽树 总 棵 数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16284", "content": "a 、 b 两地 相距 864 千米 ， 甲乙 两辆 汽车 分别 从 两地 相对 开出 ， 6.4 小时 两辆 汽车 在 途中 相遇 ， 已知 乙 车 每 小时 行 87.5 千米 ， 甲 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16385", "content": "某 件 商品 按 每个 5 元 的 利润 卖出 4 个 钱 数 ， 与 按 每个 20 元 的 利润 卖出 3 个 的 钱 数 一样 多 ， 这种 商品 每个 成本 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "16422", "content": "小 文 今年 11 岁 ， 爷爷 的 年龄 比 他 的 5 倍 多 8 岁 ， 爷爷 明年 多少岁 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16437", "content": "跳绳 比赛 中 ， 刘 红 跳 了 160 下 ， 是 李 明 跳 的 下 数 的 (4/5) ， 张 华 跳 的 下 数 是 李 明 的 (3/4) ， 张 华 跳 了 多少 下 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16486", "content": "一 头 大象 重 3.4 吨 ， 一头 鲸鱼 的 重量 是 大象 的 5.8 倍 ， 鲸鱼 比 大象 重 多少 吨 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16489", "content": "学校 买来 故事书 、 科技 书 各 9 包 ． 故事书 每包 25 本 ， 科技 书 每包 18 本 ． 一共 买来 书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16493", "content": "一 个 县 去年 计划 造林 1000 公顷 ， 实际 超过 计划 的 (1/10) ， 实际 造林 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16553", "content": "(4/5) 吨 煤 ， 用 去 (13/20) ， 还 剩下 这 堆 煤 的 几分 之 几 ？ 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16601", "content": "把 一根 钢管 锯 成 一样 长 的 小 段 ， 锯 了 5 次 ， 每 段 占 全长 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16628", "content": "学校 书法 组 有 25 人 ， 器乐 组 的 人数 是 书法 组 的 3 倍 ． 器乐 组 有 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16629", "content": "一 本书 共有 440 页 ． 小 华 已经 读 了 8 天 ， 一共 读 了 240 页 ． 剩下 的 如果 要 5 天 读完 ， 每天 至少 要 读 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16638", "content": "姐姐 今年 15 岁 ， 我 今年 12 岁 ． 5 年 后 ， 姐姐 比 我 大 多少岁 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16642", "content": "有 一条 宽 4 米 的 人行道 ， 占地面积 480 平方米 ， 为了 方便 ， 道路 的 宽度 要 增加 到 12 米 ， 长 不变 ， 扩宽 后 这 条 人行道 的 面积 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16702", "content": "东华 小学 中年级 有 学生 220 名 ， 高年级 比 中年级 多 (1/4) ， 而 比 低年级 少 (1/6) ， 低年级 有 学生 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16746", "content": "加工 1920 个 零件 ， 王师傅 单独 完成 要 12 天 ， 李师傅 单独 完成 要 16 天 ， 李师傅 每天 比 王师傅 少 加工 多少 个 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16757", "content": "秦 庄 去年 玉米 每 公顷 产量 达到 8 吨 ， 进行 改良 后 ， 今年 每 公顷 达到 9.6 吨 ， 比 去年 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16758", "content": "小 红 今年 12 岁 ， 爸爸 的 年龄 比 小 红 年龄 的 3 倍 大 2 岁 ， 爸爸 今年 多少岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16895", "content": "学校 组织 4 、 五年级 学生 看望 烈士 家属 ， 四年级 去 了 80 人 ， 五年级 去 的 人数 是 四年级 的 5 倍 ， 他们 一共 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16903", "content": "a 城 到 b 城 的 公路 长 150 千米 ． 一辆 汽车 走 高速路 的 速度 是 75 千米 / 时 ， 走 普通 公路 的 速度 是 50 千米 / 时 ． 从 a 城 去 b 城 走 高速路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16918", "content": "码头 上 有 165 吨 货物 ， 现 用 6 辆 载重 为 5.5 吨 的 卡车 运 ， 需要 运 多少 次 才能 运 完 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16946", "content": "运动会 上 315 个 同学 参加 体操 表演 ． 他们 平均 分成 5 队 ， 每队 平均 分成 7 组 ． 每组 有 多少 个 同学 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16997", "content": "张 阳 读 一本 科普 书 ， 第一周 读 了 这 本书 的 (1/3) ， 第 二 周 读 了 160 页 ， 剩下 这 本书 的 (2/5) 没有 读 ， 这本 科普 书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17014", "content": "某 工地 需要 运 黄土 44.5 吨 ， 用 一辆 载重 2.5 吨 的 汽车 运 了 10 次 ， 余下 改用 一辆 载重 1.5 吨 的 汽车 运 ， 还要 运 多少 次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17025", "content": "用 49 - 38 的 差 乘以 8 / 64 的 商 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17078", "content": "甲 、 乙 两个 工程队 共同 修 一条 7.15 米 长 的 公路 ， 甲队 每天 修 0.65 米 ， 乙 队 每天 比 甲队 多 修 0.13 米 ， 多少 天 能 修 完 这 条 公路 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17108", "content": "一 艘 货轮 从 上海 到 广州 航程 是 1800 千米 ． 平均 每天 行 300 千米 ． 几天 可以 到达 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17109", "content": "甲 、 乙 、 丙 3 人 共 加工 1000 个 零件 ． 甲 、 乙 两 人 完成 数量 的 比 是 7 ： 5 ， 丙 比 甲 少 完成 64 个 零件 ， 乙 完成 了 多少 个 零件 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17134", "content": "李老师 有 415 本 练习本 ， 发给 二年级 同学 196 本 ， 一年级 同学 208 本 ． 李老师 还 剩 多少 本 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17140", "content": "爸爸 身高 1.74 米 ， 妈妈 身高 1.5 米 ， 小 明 踩 在 一块 石头 上 与 妈妈 一样 高 ， 妈妈 踩 在 这块 石头 上 与 爸爸 一样 高 ． 小 明 身高 = 多少 米 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17147", "content": "一 个 除法 算式 ， 除数 是 5 ， 商 是 48 ， 余数 是 4 ， 那么 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17180", "content": "修 一条 路 ， 已修 和 未 修 的 千米 数 比 是 3 ： 5 ． 如果 再 修 12 千米 ， 则 已修 和 未 修 的 千米 数 9 ： 1 ， 这 条 路 共 长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "17256", "content": "工厂 一共 做 了 48 个 玩具 熊 ， 送给 幼儿园 15 个 ， 剩下 的 平均 分给 一年级 3 个 班 ， 每班 可 分 得 几个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17266", "content": "少先队员 共 采集 标本 120 只 ， 其中 62.5% 是 植物 标本 ， 其余 是 昆虫 标本 ， 昆虫 标本 有 多少 只 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17268", "content": "商场 1 - 6 月份 共 卖出 彩色 电视机 264 台 ， 平均 每个 月 卖出 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17281", "content": "(2/3) - (3/5) 的 差 乘 (5/7) ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17285", "content": "一 艘 大 船运 了 6 次货 ， 一艘 小 船运 了 9 次货 ， 大船 每次 运 30 吨 ， 小船 每次 运 12 吨 ， 大船 和 小船 一共 运 了 多少 吨 货 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "17290", "content": "杭州 到 黄山 相距 240 千米 ． 一列 火车 的 速度 是 120 千米 / 时 ， 一辆 汽车 的 速度 是 80 千米 / 时 ． 如果 火车 和 汽车 同时 从 杭州 出发 ， 那么 火车 比 汽车 到达 黄山 的 时间 早 多少 小时 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17301", "content": "阳光 小学 三年级 有 学生 248 人 ， 比 四年级 学生 少 63 人 ， 四年级 有 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17369", "content": "滑冰场 上午 有 72 人 ， 中午 有 44 人 离去 ， 又 有 85 人 到来 ． 现在 有 多少 人 滑冰 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17388", "content": "小 红 在 跳绳 比赛 中 ， 前 3 次 每次 平均 跳 96 下 ， 第 4 次 跳 了 104 下 ， 她 平均 每次 跳 多少 下 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17403", "content": "某 汽车厂 去 年产 汽车 20000 辆 ， 其中 小型车 占 (1/8) ， 其余 为 大型 车 ， 今年 计划 大型 车 产量 未 变 ， 增产 小型车 若干辆 使 小型车 产量 占 总产量 的 (1/5) ， 求 今年 增产 多少 辆 小型车 （ 列式 解答 ）", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17421", "content": "原来 做 一条 裙子 用布 (7/10) 米 ， 现在 只要 (3/5) 米 ． 原来 做 900 条 裙子 所用 的 布 ， 现在 可以 做 多少 条 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17422", "content": "甲 数 的 80% 与 乙 数 的 30% 相等 ， 已知 甲 数 的 倒数 是 3 + (1/5) ， 乙 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17470", "content": "一 辆 汽车 从 宝应 去 扬州 ， 已经 行 了 42 千米 ， 占 全程 的 (2/5) ， 两地 相距 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17479", "content": "超市 原有 西瓜 348 千克 ， 上午 卖出 153 千克 ， 下午 又 运 来 213 千克 ， 这时 超市 有 西瓜 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17497", "content": "某 织布厂 第一 车间 有 工人 250 人 ， 相当于 第 二 车间 人数 的 (5/6) ， 两 车间 人数 的 总数 占 职工 总数 的 11% ． 全厂 职工 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17504", "content": "小 明 看 一本 150 页 的 故事书 ， 前 3 天 看 了 整本书 的 (3/5) ． 平均 每天 看 多少 页 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17516", "content": "学校 图书室 科技 书 的 本 数 是 故事书 的 (2/3) ， 故事书 的 本 数 占 图书 总数 的 (3/5) ， 图书室 共有 图书 4500 ， 科技 书 有 多少 本 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17526", "content": "喜 羊 羊 和 灰 太 狼 在 体育场 进行 20000 米 赛跑 ， 灰 太 狼 的 速度 是 喜 羊 羊 的 6 倍 ， 当 它们 从 起点 一起 出发 后 ， 喜 羊 羊 不停 地 跑 ， 灰 太 狼 跑 到 某处 后 开始 睡觉 ， 等 它 醒来时 喜 羊 羊 已经 领先 它 10000 米 ， 灰 太 狼 奋起直追 ， 当 喜 羊 羊 到达 终点 时 ， 灰 太 狼 仍然 落后 200 米 ， 那么 灰 太 狼 睡觉 期间 喜 羊 羊 跑 了 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17535", "content": "学校 组织 同学 们 去 看 电影 ， 三年级 有 260 人 ， 分别 乘坐 5 辆车 ， 平均 每辆车 坐 多少 人 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17583", "content": "一 根 铁丝 用 去 10.5 米 ， 是 剩下 铁丝 的 5 倍 ， 剩下 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17611", "content": "一 头 猪 重 208 千克 ， 一头 牛 的 重量 是 它 的 3 倍 ， 一头 牛 和 一头 猪 一共 重 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17668", "content": "甜美 水果店 上午 卖 苹果 12 箱 ， 每箱 重 20 千克 ． 如果 平均 每千克 苹果 售价 2 元 ， 这些 苹果 卖 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "17694", "content": "桃林 沟 果园 里 有 苹果树 100 棵 ， 梨树 的 棵 树 比 苹果树 少 (1/4) ， 梨树 有 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17773", "content": "甲 、 乙 两 人 同时 骑 自行车 从 a 城 到 b 城 ， 甲 每 小时 行 15 千米 ， 乙 每 小时 行 12 千米 ， 甲 由于 途中 有事 耽误 了 4 小时 ， 结果 甲 和 乙 同时 到达 b 城 ． 求 a 、 b 两城 间 的 距离 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "17781", "content": "李 明 家 5 月 共 支出 2000 元 ， 其中 购物 支出 占 20% ， 伙食费 支出 占 40% ． 两项 支出 共 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17789", "content": "饲养场 有 公鸡 245 只 ， 母鸡 的 只 数 比 公鸡 的 3 倍 多 45 只 ， 饲养场 一共 有 多少 只 母鸡 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17849", "content": "某 商店 6 月份 的 营业额 是 50 万元 ， 按 5% 缴纳 营业税 ， 这个 商店 要 缴纳 营业税 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17850", "content": "一 堆 煤 ， 第一周 用 去 这 堆 煤 的 40% ， 每 二 周 用 去 这 堆 煤 的 (1/3) ， 刚好 用 去 4 吨 ． 这 堆 煤 原有 多少 吨 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17853", "content": "学校 计划 用 一些 钱 购买 单价 1050 元 得 电子琴 ， 正好 可以 买 7 台 ， 实际 买 录音机 用 去 了 3150 元 ， 剩下 的 钱 还 够买 几台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17880", "content": "一 个数 的 (5/7) 是 114 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17901", "content": "黄河 全长 5464 千米 ， 长江 全长 6300 千米 ， 长江 比 黄河 长 多少 千米 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "17902", "content": "3 、 四年级 学生 向 灾区 捐款 ， 三年级 捐 了 769.3 元 ， 比 四年级 少 48.9 元 ， 两个 年级 共 捐 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17983", "content": "王老师 给 营业员 200 元 买 了 16 个 排球 ， 找回 8 元 ， 每个 排球 几元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18002", "content": "为 支援 汶川 抗震救灾 ， 滨海 市 和平 小学 五年级 一班 41 人 共 捐款 943 元 ， 三年级 一班 38 人 共 捐款 722 元 ， 五年级 平均 每人 比 三年级 多 捐 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18046", "content": "我国 供水 不足 的 城市 个数 占 全国 总 城市 的 (2/3) ， 其中 又 有 (1/4) 的 城市 严重 缺水 ， 全国 严重 缺水 的 城市 个数 占 总 城市 个数 的 几分 之 几 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18054", "content": "从 5050 中 连续 减去 5 ， 最 多 能 减 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18063", "content": "某 商店 今天 卖出 15 台 电视机 ， 7 台 洗衣机 ． 卖出 的 电视机 是 洗衣机 的 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18088", "content": "12 路 公共汽车 车队 每月 计划 用 汽油 5400 升 ， 采取 节油 措施 后 ， 实际 节约 了 (1/12) ， 实际 节油 多少 升 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18149", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 已经 行驶 了 全程 的 (5/7) ， 距离 乙地 还有 132 千米 ， 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18153", "content": "小 红 上个月 买 书 花 了 15 元 ， 占 总支出 的 20% ， 小 红 上个月 一共 花 了 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18156", "content": "买 4 支 钢笔 比 买 5 支 中性笔 贵 4.8 元 ， 每支 中性笔 的 价钱 是 1.2 元 ， 每支 钢笔 多少 元 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18166", "content": "一 件 衬衫 原价 140 元 ， 现在 打 0.9 出售 ， 这件 衬衫 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18168", "content": "75 * 32 与 23 的 和 ， 积 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18174", "content": "小 明 有 一本 故事书 ， 第一天 看 了 16 页 ， 第 二 天 看 了 20% ， 还 剩下 56 页 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18176", "content": "一 批 牡丹花 种 的 发芽率 是 80% ， 张 叔叔 打算 培育 3000 株 花苗 ， 需要 播种 多少 个 红球 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18232", "content": "阳光 小学 在 大礼堂 举行 开学典礼 ， 礼堂 座位 是 9 排 ， 每排 有 186 个 位置 ． 现在 位置 空 出 了 12 个 ， 一共 有 多少 人 参加 这个 开学典礼 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18252", "content": "妈妈 今年 35 岁 ， 小 红 今年 5 岁 ， 明年 妈妈 的 年龄 是 小 红 的 多少倍 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18301", "content": "一 个数 的 (1/3) 比 它 的 (1/6) 多 60 ， 求 这个 数 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18318", "content": "水果店 有 苹果 180 ㎏ ， 卖出 (1/3) 后 ， 剩下 的 苹果 正好 是 桔子 的 60% ， 水果店 有 桔子 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18319", "content": "学校 举行 运动会 ， 参加 入场式 的 仪仗队 同学 共有 205 人 ， 每 5 人 排 一行 ， 每 一行 空 2 米 ． 如果 这个 仪仗队 以 每分钟 20 米 的 速度 通过 主席台 ， 需要 多少 分钟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18326", "content": "计算 ： （ (2/29) + (2/23) ） * 29 * 23 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18332", "content": "希望 小学 六年级 共有 女生 25 人 ， 男生 28 人 ， 男生 比 女生 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18333", "content": "甲乙 两艘 船 分别 从 两个 码头 同时 相向 而 行 ． 甲 船 每 小时 行驶 40 海里 ， 乙 船 每 小时 行驶 28 海里 ， 两 船 行驶 4 小时 后 相遇 ． 甲 、 乙 两个 码头 相距 多少 海里 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18360", "content": "甲地 到 乙地 的 公路 长 250 千米 ， 一辆 客车 和 一辆 货车 同时 从 甲地 开往 乙地 ， 客车 每 小时 行 100 千米 ， 货车 每 小时 行 80 千米 ． 客车 到达 乙地 时 ， 货车 行 了 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18362", "content": "4 （ 1 ） 班 有 40 人 ， 其中 15 人 会 下 国际象棋 ， 23 人 会 下 中国象棋 ， 两种 象棋 都 不会 下 的 有 10 人 ． 两种 象棋 都 会 下 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18385", "content": "学校 教学楼 有 4 层 ， 每层 5 间 教室 ， 共 装 120 盏 日光灯 ， 平均 每间 教室 安装 多少 盏 日光灯 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18405", "content": "甲 、 乙 两 人 住 在 同一个 地方 ， 甲 、 乙 骑车 速度 分别 为 300 米 / 分 、 360 米 / 分 ． 乙 从 住处 骑车到 学校 用 时 15 分钟 ， 求 甲 从 家 到 学校 用 时 几分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18415", "content": "一 种 商品 原价 是 100 元 ， 现在 打 0.8 销售 ， 现在 便宜 了 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18419", "content": "计算 ： 3333 * 13 + 4444 * 4 + 5555 * 9 = ．", "knowledge": ["*", "+"], "difficulty": 0.4, "length": 11}
-{"question_id": "18450", "content": "学校 图书室 原有 图书 4200 册 ， 今年 图书 册数 增加 了 (3/20) ． 今年 有 图书 多少 册 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18453", "content": "妈妈 买来 一些 梨 和 6 个 苹果 ， 吃 了 4 个 梨 ， 剩下 的 梨 是 苹果 的 2 倍 ， 妈妈 买 了 多少 个 梨 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18517", "content": "两辆 汽车 同时 从 甲 、 乙 两城 出发 相向 而 行 ， 快车 每 小时 行 57 千米 ， 慢车 每 小时 行 43 千米 ， 5 小时 后 相遇 ， 则 甲 、 乙 两城 相距 多少 千米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18553", "content": "学校 种植 一批 树苗 ， 其中 樟树 有 30 ， 桂花树 的 棵 数 是 樟树 的 了 (4/5) ， 广玉兰 的 棵 数 是 桂花树 的 (2/3) ． 学校 种植 了 多少 棵 广玉兰 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18573", "content": "张师傅 5 天 完成 任务 的 (1/3) ， 完成 任务 他 需要 多少 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18585", "content": "王 大伯 花 1740 元 买 一台 家电 下乡 冰箱 ， 享受 政府 13% 的 补贴 ， 这 台 冰箱 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18609", "content": "一 件 商品 打 0.7 出售 ， 正好 比 原来 便宜 60 元 ． 这件 商品 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18617", "content": "甲 、 乙 两车 从 相距 594 千米 的 两地 同时 开出 ， 甲 车 每 小时 行 54 千米 ， 乙 车 每 小时 行 45 千米 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18618", "content": "一 个 玻璃瓶 装有 含盐 率 为 15% 的 盐水 500 克 ． 如 要 配制 成 含盐 率 为 5% 的 盐水 ， 要 加入 多少 克 水 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18626", "content": "3.9 与 2.9 的 和 除以 3.4 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18638", "content": "“ 6 • 一 ” 节 那天 ， 新华书店 举行 促销 活动 ， 所有 书 按 原价 打 0.85 出售 ． 小 红 买 了 一套 原价 是 200 元 的 《 安徒生 童话 》 丛书 ， 打折 后 比 原价 便宜 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18685", "content": "工程队 修 一条 公路 ， 计划 每天 修 100 米 ， 40 天 完成 ． 实际 2 天 就 修 了 800 米 ， 照 这样 的 速度 ， 多少 天 可以 完成 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18707", "content": "(4/5) + (3/15) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18748", "content": "一 件 衣服 打 0.8 出售 ， 比 原价 便宜 32 元 ， 原价 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18772", "content": "一 个数 除以 7 ， 商 是 9 ， 余数 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "18851", "content": "一 种 毛衣 ， 原价 56 元 ， 现在 的 价钱 比 原来 降低 了 (2/7) ， 降价 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18854", "content": "在 1200 米 的 跑道 上 等 距离 植树 ， 最少 要 种 多少 棵 树 ， 才能 保证 至少 有 两棵树 之间 的 距离 小于 15 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18864", "content": "某地 的 水库 4 周 有 长 为 8080 米 的 防水 堤 ， 堤上 每隔 8 米 栽 一棵树 ， 然后 在 相邻 的 两棵树 之间 栽 一棵 柳树 ， 应该 准备 两种 树 各 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18883", "content": "压路机 的 滚筒 是 圆柱体 ， 它 的 长 是 2 米 ， 滚筒 横截面 的 半径 是 0.6 米 ． 如果 每 分 转动 5 周 ， 每 分 可以 压 多 大 的 路面 ？ （ π 取 3.14 ）", "knowledge": ["*"], "difficulty": 0.3, "length": 9}
-{"question_id": "18902", "content": "一 个 因数 = ， 另 一个 因数 是 44 ， 则 它们 的 积 是 836 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18952", "content": "一 辆 小汽车 的 速度 是 60 千米 / 时 ， 一辆 货车 的 速度 是 48 千米 / 时 ， 两车 从 甲地 同时 出发 到 乙地 ， 小汽车 4 小时 到达 乙地 ， 货车 要 几小时 才能 到达 乙地 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18959", "content": "张老师 在 文具店 里 买 了 一支 钢笔 和 一 本书 ， 一支 钢笔 的 单价 15.8 元 ， 比 一 本书 的 单价 少 1.2 元 ， 张老师 一 共用 了 多少 元 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18974", "content": "一 根 绳子 长 120 米 ， 第一次 用 去 全长 的 (2/5) ， 第 二 次 用 去 40 米 ， 这根 绳子 短 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18978", "content": "修 一条 长 12000 米 的 公路 ， 原 计划 每天 修 300 米 ， 结果 30 天 完成 了 任务 ， 实际 比 原 计划 每天 多 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19018", "content": "果园 里 有 桃树 120 棵 ， 苹果树 是 桃树 棵 数 的 (3/4) ， 这 两种 树 共有 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19122", "content": "汽车 3 小时 行驶 243 千米 ， 火车 6 小时 行驶 606 千米 ， 火车 的 速度 比 汽车 的 速度 快 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19129", "content": "电视机厂 计划 30 天 生产 电视机 1200 台 ， 实际 每天 比 计划 多 生产 10 台 ， 实际 多少 天 完成 任务 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19158", "content": "4 （ 1 ） 班 共有 50 人 参加 语 、 数 、 英 3 科 的 兴趣小组 ． 其中 参加 数学 兴趣小组 有 20 人 ， 参加 语文 兴趣小组 有 15 人 ， 只 参加 英语 兴趣小组 的 有 24 人 ． 数学 、 语文 两个 兴趣小组 都 参加 的 有 多少 人 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19176", "content": "3.6 比 一个 数 的 25% 少 1.2 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19222", "content": "小 明 看 一 本书 ， 第一天 看 了 全书 的 (1/7) ， 第 二 天 看 了 27 页 ， 两天 共 看 的 页数 与 剩下 页数 的 比 是 2 ： 3 ， 这 本书 共有 多少 页 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19230", "content": "在 一个 有 余数 的 除法 算式 里 ， 余数 是 5 ， 那么 除数 最小 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19245", "content": "小 明 用 10.2 元 买 文具 ， 买 了 6 支 铅笔 ， 每支 0.45 元 ， 余下 的 钱 买 圆珠笔 ， 每支 2.5 元 ， 可以 买 多少 支 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19267", "content": "有 210 吨 黄沙 要 运到 建筑工地 ， 第一次 运走 了 总数 的 (1/3) ， 第 二 次 运走 总数 的 40% ， 还要 运 多少 吨 才能 运 完 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19291", "content": "妈妈 带 了 500 元 钱 ， 给 我 买 了 一双 鞋 花 了 228 元 ， 买 一条 裙子 花 了 172 元 ． 还 剩 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19368", "content": "同学 们 沿 小路 一侧 植树 （ 两端 都 种 ） ， 每隔 8 米 种 一棵 ， 一共 种 了 40 棵 ． 这 条 小路 有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19377", "content": "小 明 看 一本 180 页 的 故事书 ， 已经 看 了 (3/5) ， 已 看 了 多少 页 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19390", "content": "一 个 棱 长 为 6 分 米 的 正方体 木块 的 表面积 = 多少 平方分米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19437", "content": "佳 怡 家 去年 收 苹果 650 千克 ， 今年 比 去年 增产 5% ， 今年 收 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19497", "content": "一 桶 油 ， 第一次 倒 出 40% ， 第 二 次 比 第一次 少 倒 出 10 千克 ， 桶 里 还 剩 30 千克 ， 这 桶 油 原来 有 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "19545", "content": "一 个 数学 检测 只有 两道 题 ， 结果 全班 有 12 人 全 对 ， 有 一 题 有 27 人 做 对 ， 第 二 道 题 有 21 人 做 错 ， 两道 题 都 做 错 的 有 多少 人 ．", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19586", "content": "王大妈 收 了 (1/2) 吨 瓜 ， 第一天 卖出 总数 的 (1/5) ， 第 二 天 卖出 总数 的 (1/6) ， 还 剩 总数 的 几分 之 几 没 卖出 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19587", "content": "一 辆 汽车 每 小时 行驶 80 千米 ， 从 甲地 到 乙地 共 行驶 了 (4/5) 小时 ． 甲 、 乙 两地 相距 多少 千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19595", "content": "张师傅 去 商店 买 大米 ， 由于 售货员 疏忽 ， 少 给 了 他 10 斤 大米 ， 但 收 了 他 36 元 钱 ， 已知 每 3 斤 大米 1.2 元 ． 问 售货员 给 了 张师傅 多少 斤 大米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19655", "content": "玲玲 和 丫丫 两 人 相距 200 米 ， 玲玲 在 前 每秒 跑 3 米 ， 丫丫 在 后 每秒 跑 5 米 ． 两 人 同时 出发 ， 同 向 而 行 ， 几秒 后 丫丫 能 追 上 玲玲 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19680", "content": "540 = 多少 的 20 倍 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19695", "content": "小 刚 看 一本 课外书 ， 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 了 全书 的 (3/7) ． 小 军 两天 一共 看 了 这 本书 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "19730", "content": "(12/5) 小时 的 (7/24) = 多少 小时 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19741", "content": "小 丽 和 小强 共同 打 一份 稿纸 ， 他们 打字速度 比 是 5 ： 3 ， 完成 任务 时 ， 小 丽 比 小强 多 打 1400 个 字 ． 这份 稿件 共有 多少 个 字 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "19746", "content": "三年级 同学 做操 ， 如果 每排 站 12 人 ， 可以 站 20 排 ； 如果 每排 站 8 人 ， 可以 站 几排 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19806", "content": "《 成长 日记 》 一 书 有 252 页 ， 小 华 前 5 天 一共 看 了 60 页 ， 照 这样 计算 ， 余下 的 还 需 多少 天 看 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19819", "content": "小 丽 读 一本 故事书 ， 第一天 读 了 全书 的 10% ， 以后 每天 读 21 页 ， 又 读 了 6 天 正好 读完 ． 这 本书 一共 有 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19866", "content": "甲 、 乙 两城 相距 875 千米 ， 一辆 汽车 以 每 小时 48 千米 从 甲 城 开出 ， 行驶 11 小时 ， 离 乙 城 还有 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19867", "content": "一 个 圆柱体 的 表面积 比 侧 面积 大 6.28 dm ^ 2 ， 高 是 10 dm ． 这个 圆柱体 的 体积 = 多少 dm ^ 3 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19868", "content": "一 个 饲养场 ， 养鸭 1200 只 ， 养 的 鸡 比 养 的 鸭 多 (3/5) ， 养 的 鸡 比 鸭 多 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19875", "content": "水果店 运进 36 筐 水果 ， 每 筐 25 千克 ． 卖出 320 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19878", "content": "图书馆 购进 一批 新书 ， 其中 385 本 是 科技 书 ， 710 本 是 文艺 书 ， 其余 是 连环画 ． 连环画 占 总数 的 25% ， 这 批 新书 有 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19900", "content": "郭 海燕 同学 买 了 3 本 《 科学 趣谈 》 ， 付 了 50 元 ， 找回 8 元 ． 每 本 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19906", "content": "小 明 0.5 小时 行走 2.6 千米 ， 一只 蜜蜂 的 飞行速度 是 小 明 的 3.8 倍 ． 这 只 蜜蜂 每 小时 飞行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19915", "content": "一 个 长方体 的 体积 是 40 立方厘米 ， 底面 是 边长 2 厘米 的 正方形 ， 这个 长方体 的 高 = 多少 厘米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19921", "content": "180 的 (4/9) 比 一个 数 的 50% 少 20 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19973", "content": "5 （ 1 ） 班 昨天 的 出勤率 是 96% ， 昨天 48 人 到校 ， 多少 人 有事 请假 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20022", "content": "何 老师 买 了 110 本 故事书 ， 114 本 科技 书 ， 平均 分给 14 个 读书 小组 ， 每组 可以 分 得 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20043", "content": "比 25 多 9 的 数 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "20076", "content": "二年级 买来 科技 书 16 本 ， 故事书 26 本 ． 把 这些 书 平均 分给 二年级 7 个 班 ， 平均 每个 班 分 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20131", "content": "一 堆 煤 ， 第一次 用 去 40% ， 第 二 次 用 去 原来 总量 的 (1/3) ， 还 剩余 12 吨 ． 这 堆 煤 共有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20140", "content": "一 根 4.8 米 长 的 竹竿 直 插入 水池 中 ， 竹竿 的 入 泥 部分 是 0.4 米 ， 露出 水面 的 部分 是 0.8 米 ， 池 水深 多少 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20151", "content": "一 根 绳子 的 长度 等于 它 本身 长度 的 (1/3) + 10 米 ， 这 绳子 长 多少 米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20185", "content": "光明 小学 新建 了 一幢 8 层 的 数字 楼 ， 每层 有 5 个 教室 ， 每个 教室 放 24 张 课桌 ， 一共 需要 多少 张 课桌 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20186", "content": "学校 图书馆 有 故事书 1820 本 ， 是 科技 书 的 2 倍 ． 借出 一部分 科技 书后 ， 剩下 科技 书 900 本 ． 借出 科技 书 多少 本 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20234", "content": "一 项 工程 ， 由于 采用 了 先进 技术 ， 只用 了 14.4 万元 ， 比 原 计划 节约 投资 3.6 万元 ， 节约 了 百分之几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20236", "content": "被除数 是 除数 的 8 倍 ， 被除数 是 1000 ， 除数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20259", "content": "某个 地区 有 一个 活动 ： 用 3 个 空瓶 可以 换 一瓶 水 ， 小 明 现在 有 10 个 空瓶 ， 那么 小 明 可以 喝 到 多少 瓶 水 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20281", "content": "鸭 比 鸡 多 210 只 ， 鸡 的 只 数 和 鸭 的 只 数 比 是 2 ： 5 ． 鸭 和 鸡 共有 多少 只 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20297", "content": "一 台 计算机 10 小时 用电 (12/5) 千瓦时 ． 这 台 计算机 平均 每 小时 用电 多少 千瓦时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20300", "content": "1932 / 437 与 368 的 差 ， 商 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20302", "content": "一 块 铜 和 锡 的 合金 中 ， 铜 与 锡 的 比 是 9 ： 5 ， 已知 铜 比 锡 重 800 克 ， 这块 合金 有 多少 克 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20321", "content": "用 一只 水 桶装水 ， 把 水 加 到 原来 的 2 倍 ， 连 桶 重 10 千克 ， 如果 把 水 加 到 原来 的 5 倍 ， 连 桶 重 22 千克 ． 桶 里 原有 水 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20327", "content": "五年级 同学 一共 捐款 640 元 ， 四年级 捐 的 比 五年级 多 (1/8) ， 四年级 同学 捐款 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20360", "content": "外国语 实验 小学 三年级 学生 参加 浇 树 活动 ， 7 个 班 一共 浇 了 644 棵 树 ． 平均 每个 班 浇 多少 棵 树 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20388", "content": "小 婷 跳绳 原来 每分钟 跳 75 下 ， 现在 每分钟 可以 跳 100 下 ． 原来 4 分钟 跳 的 下 数 ， 现在 只要 跳 几分钟 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20436", "content": "203 - 198 的 差 乘 53 与 27 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20445", "content": "甲 数 是 18 ， 乙 数 是 40 ， 甲 数 是 乙 数 的 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20458", "content": "襄樊市 体育场 是 一个 直径 大约 是 400 米 的 圆柱形 ， 王 叔叔 每天 早上 要 绕 体育场 跑跑 4 圈 一共 大约 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20490", "content": "每天 放 4 场 电影 ， 每场 最 多 可 坐 580 人 ， 每天 最 多 有 多少 人 看 电影 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20513", "content": "实验 幼儿园 食堂 买来 豆角 和 西红柿 各 16 千克 ， 每千克 豆角 3.4 元 ， 每千克 西红柿 1.6 元 ， 买 两种 菜 共 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20519", "content": "车站 有 850 千克 蔬菜 要 运到 菜场 出售 ， 运 了 4 车 还 剩 90 千克 ． 平均 每 车运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20524", "content": "小 丽 的 姐姐 将 一个月 工资 的 25% 存入 银行 ， 15% 作为 保险费 ， 20% 用于 炒股 ， 最后 剩下 800 元 作为 生活费 ， 她 一个月 工资 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20583", "content": "如果 从 一捆 粗细 均匀 的 电线 上 截取 1 米 长 的 电线 ， 称 得 它 的 重 为 0.2 斤 ， 再 称 得 剩余 电线 的 重 为 20 斤 ， 则 原来 这 捆 电线 总长度 为 多少 米 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20611", "content": "弟弟 今年 4 岁 ， 哥哥 今年 12 岁 ， 10 年 后 ， 哥哥 比 弟弟 大 几岁 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20631", "content": "两个 铺路 队 从 两端 同时 施工 铺 一条 2070 m 的 路 ， 甲队 每天 铺 46 m ， 乙 队 每天 铺 44 m ， 多少 天 能 铺 完 这 条 路 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20646", "content": "五年级 有 学生 29 人 ， 比 女生 多 16% ， 女生 有 多少 人 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20647", "content": "平 海 家园 要 修 一条 420 米 长 的 自来水管 道 ， 如果 每 根 自来水管 长 6 米 ， 至少 需要 多少 根 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20657", "content": "“ 5 一 ” 劳动节 ， 家电 商场 搞 促销 活动 ， 一款 彩电 原价 4500 元 ， 现 以 原价 的 85% 出售 ， 现在 的 售价 比 原来 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20771", "content": "一 个 比 的 前项 是 (1/6) ， 比值 是 (1/3) ， 后 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20781", "content": "有 10 个 铅笔盒 ， 其中 5 个 装有 铅笔 ， 4 个 装有 钢笔 ， 2 个 既 装有 铅笔 又 有 钢笔 ， 空 笔盒 有 多少 个 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20787", "content": "西山 村 今年 已 积肥 82 万吨 ， 比 原 计划 多 积 14 万吨 ， 完成 计划 的 几分 之 几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20800", "content": "李师傅 铺设 1 平方米 地砖 需要 (1/8) 小时 ． 按照 这样 的 速度 计算 ， 他 铺 好 一个 长 16 米 、 宽 (16/3) 米 的 长方形 会议室 ， 需要 多少 时间 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20803", "content": "鸡场 养 有 小鸡 2240 只 ， 中 鸡 是 小鸡 的 (5/8) ， 大 鸡 是 中 鸡 的 (6/7) ， 大 鸡 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20819", "content": "一 本 《 快乐 学 数学 》 定价 4.5 元 ， 一本 《 数学 小灵通 》 定价 2.8 元 ． 王 鹏 有 10 元 钱 ， 他 各 买 了 一本 ， 还 剩下 多少 钱 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20828", "content": "小 邵 带 500 元 去 买 《 数学 小灵通 》 ， 买 了 25 套 ， 还 剩 50 元 ． 每套 价钱 多少 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20848", "content": "李 明 收集 邮票 49 枚 ， 王 红 收集 的 邮票 比 李 明 多 (2/7) ． 李 明 比 王 红 少 收集 邮票 多少 枚 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20940", "content": "学校 有 808 个 同学 ， 分 乘 6 辆 汽车 去 春游 ， 第一辆 车 已经 接 走 了 128 人 ， 如果 其余 5 辆车 乘 的 人数 相同 ， 最后 一辆车 乘 了 几个 同学 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20952", "content": "学校 图书馆 有 科技 书 650 本 ， 文艺 书本 数 比 科技 书本 数 的 3 倍 多 45 本 ， 图书馆 有 科技 书 、 文艺 书 共 多少 本 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20963", "content": "小 明 今年 15 岁 ， 爸爸 年龄 是 小 明 的 3 倍 ， 爸爸 比 小 明 大 几岁 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20984", "content": "新华 小学 今年 春季 新 栽 了 一批 树 ， 其中 松树 比 柏树 多 12 棵 ， 柏树 比 松树 少 (1/7) ． 新 栽 的 柏树 有 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21017", "content": "城西 学校 买 了 29 只 足球 ， 足球 的 只 数 比 篮球 只 数 的 2 倍 少 3 只 ， 这 两种 求 一共 买 了 多少 只 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21128", "content": "商店 运 来 5 筐 黄瓜 和 4 筐 茄子 ， 共 重 230 千克 ． 每 筐 黄瓜 重 30 千克 ， 每 筐 茄子 重 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21176", "content": "一 种 商品 现价 2400 元 ， 比 原价 降低 了 20% ， 这种 商品 比 原价 降低 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21186", "content": "一 套 服装 的 成本价 是 50 元 ， 零售商 从 生产厂家 以 出厂价 买入 ， 然后 卖出 ． 如果 生产厂家 的 利润率 为 20% ， 零售商 的 利润率 为 30% ， 则 这 套 服装 的 售价 为 ： 多少 元 ．", "knowledge": ["*", "+"], "difficulty": 0.3, "length": 9}
-{"question_id": "21203", "content": "长跑 锻炼 ， 小 雄 跑 了 3 千米 ， 小 雄 跑 的 (5/6) 等于 小 刚跑 的 ． 小 刚跑 的 是 小 勇 的 (4/5) ． 小 勇 跑 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21211", "content": "竹子 在 生长 旺盛期 每 时 约 增高 4 厘米 ， 钟状 菌 生长 更 快 ， 生长 旺盛期 每 时 约 增高 25 厘米 ． 如果 它们 都 在 生长 旺盛期 ， 开始 时 竹子 高 32 厘米 ， 钟状 菌 高 0.5 厘米 ， 几时 后 钟状 菌 的 高度 可 赶上 竹子 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21236", "content": "挖 一条 水渠 ， 如果 每天 挖 全长 的 15% 又 20 米 ， 那么 6 天 正好 挖 完 ． 这 一条 水渠 全长 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21239", "content": "沃尔玛 超市 之前 塑料袋 的 日均 使用量 为 20000 个 ， 实施 限 塑 令 以后 日 用量 下降 了 (3/4) ， 现在 塑料袋 的 日 用量 为 多少 个 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21301", "content": "某校 全体学生 列队 ， 不论 他们 人数 相等 的 分成 2 队 ， 3 队 ， 4 队 ， 5 对 ， 6 对 ， 7 对 ， 8 对 或 9 队 ， 都 会 多出 1 人 ， 那么 该校 至少 有 多少 名 学生 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "21323", "content": "一 个数 的 (2/5) 与 (3/4) * (2/3) 的 积 相等 ． 求 这个 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21325", "content": "股市 交易 中 ， 无论 买进 和 卖出 ， 均 需要 交纳 交易 资金 的 0.3% 作为 手续费 ． 某 股民 以 每股 10.65 元 买 过 某种 股票 3000 股 ， 过 了 一段时间 ， 又 以 每股 13.68 元 将 这种 股票 全部 卖出 ． 此 股民 买卖 这 支 股票 赚 了 多少 元 ？ （ 只 列式 不 计算 ）", "knowledge": ["*", "+", "-"], "difficulty": 0.6, "length": 15}
-{"question_id": "21348", "content": "用 13.1 - 6.9 的 差 去除 24.8 ， 商 = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21370", "content": "农业 机械厂 有 39 吨 煤 ， 已经 烧 了 16 天 ， 平均 每天 烧煤 1.2 吨 ． 剩下 的 煤 如果 每天 烧 1.1 吨 ， 还 可以 烧 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21398", "content": "化肥厂 计划 生产 一批 化肥 ， 第一天 生产 了 全部 任务 的 (1/6) ， 第 二 天 又 生产 了 余下 任务 的 (1/4) ， 第 3 天 又 生产 了 前两天 生产 后 余下 的 (1/5) ， 结果 还 剩下 50 吨 没有 完成 ． 问 化肥厂 计划 生产 化肥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "21403", "content": "一 辆 货车 3.5 小时 行 了 227.5 千米 ， 一列 火车 的 速度 是 货车 的 2 倍 ， 求 火车 的 速度 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21421", "content": "一 个 三角形 的 面积 是 15 cm ^ 2 ， 它 的 底 是 5 厘米 ， 高 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21487", "content": "一 瓶 油 连 瓶 重 3.4 千克 ， 瓶 重 0.5 千克 ， 用 去 1.52 千克 油 后 ， 还 剩下 多少 千克 油 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21500", "content": "空调 厂 去年 上半年 完成 全年 计划 任务 的 (9/16) ， 下半年 和 上半年 完成 的 同样 多 ， 空调 厂 去年 实际 超额完成 全年 计划 任务 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21505", "content": "王 叔叔 每个 月 的 收入 扣除 2000 元 后 按 5% 的 税率 交 了 个人所得税 22.5 元 ， 王 叔叔 的 月 收入 = 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21555", "content": "甲 、 乙 两 油库 原 存 油 数量 的 比 是 5 ： 3 ， 现 因 生产 需要 ， 从 甲 库 调出 了 90 桶 油 ， 这时 甲 、 乙 两 库 油 数 相等 ， 求 乙 库 原有 油 多少 桶 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21557", "content": "小 亮 的 储蓄 箱 中 有 18 元 ， 小 华 储蓄 的 钱 是 小 亮 的 (5/6) ． 小 新 储蓄 的 钱 是 小 华 的 (2/3) ． 小 新 储蓄 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "21575", "content": "一 包 茶叶 重 l 千克 ， 倒 出 (1/4) 后 还 剩下 多少 克 茶叶 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21612", "content": "江东 修 一条 长 600 米 的 水渠 ， 第一天 修 了 全长 的 (2/5) ， 第 二 天 修 了 全长 的 (1/4) ． 一共 修 了 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21632", "content": "板桥 小学 四年级 有 女生 120 人 ， 男生 人数 比 女生 的 2 倍 少 105 人 ． 四年级 共有 学生 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "21639", "content": "小朋友 们 在 红果 果 和 绿 泡泡 指导 下 分 糖果 ， 如 每个 人 10 个 还 剩 6 个 ， 如 每个 人 12 个 就 有 1 个 小朋友 分 不到 糖果 ， 那么 有 多少 小朋友 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21662", "content": "有 水果篮 50 个 ， 盛 有 橘子 的 有 25 个 ， 当中 16 个 还 放 有 苹果 ； 8 个 水果篮 是 空 的 ， 余下 的 只 放 有 香蕉 ？ 问 只 放 有 一种 水果 的 水果篮 有 多少 个 ﹖", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21695", "content": "一 个 班 有 学生 42 人 ， 参加 体育 代表队 的 有 30 人 ， 参加 文艺 代表队 的 有 25 人 ， 并且 每个 人 至少 参加 了 一个 队 ， 这个 班 两个 队 都 参加 的 有 几个 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21714", "content": "商店 运 来 一些 水果 ， 梨 的 筐 数 比 苹果 筐 数 少 (1/5) ． 已知 运 来 梨 40 筐 ， 运 来 苹果 多少 筐 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21726", "content": "王 大伯 养 鹅 的 只 数 是 鸡 的 (2/5) ， 是 鸭 的 (6/7) ， 养鸡 480 只 ， 养鸭 多少 只 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21794", "content": "王老师 买 60 本 一样 的 故事书 ， 付出 250 元 ， 找回 28 元 ， 每 本 图书 多少 钱 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21848", "content": "一 筐 苹果 的 (2/7) 正好 是 20 千克 ， 这 筐 苹果 重 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21855", "content": "一 个数 的 45% 比 4.8 的 2 倍 少 0.6 ， 这个 数 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21876", "content": "有 纯酒精 60 克 ， 配制 浓度 为 75% 的 酒精 溶液 需 加水 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21881", "content": "修 一段 公路 ， 第一天 修 了 这 段 路 的 (5/16) ， 第 二 天 与 第一天 修 的 同样 多 ， 还 剩下 这 段 路 的 几分 之 几 没有 修 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21882", "content": "为了 保护 3 峡 库区 的 生态 竦 境 ， 国家 给 幸福村 拨款 800 万元 专款 ， 其中 (3/5) 用于 退耕还林 ， (3/10) 用于 农民 生活 、 生产 补偿 ， 用于 退耕还林 的 比 用于 生活 、 生产 补偿 的 多 多少 万元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21884", "content": "一 个 工厂 由于 采用 了 新工艺 ， 现在 每 件产品 的 成本 是 37.4 元 ， 比 原来 降低 了 15% ， 原来 每件 成本 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21887", "content": "小马 的 班上 制作 了 100 张 彩券 销售 ， 这些 彩券 中 只有 一张 能 获奖 ． 小马 要 购买 多少 张 彩券 才 会 有 (1/10) 机会 获奖 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "21946", "content": "多少 除以 32 ， 商 和 余数 都 是 16 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22011", "content": "一 批 零件 共有 5400 个 ， 王师傅 6 小时 做 了 全部 的 (1/3) ， 以 这样 的 速度 ， 还 需 几小时 才能 全部 做 完 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22015", "content": "花园 小学 组织 学生 植树 ， 五年级 植树 160 棵 ， 正好 是 四年级 的 2 倍 ， 三年级 比 四年级 少 20 棵 ， 三年级 植树 多少 棵 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22051", "content": "服装厂 要 做 一批 童装 ， 如果 每天 做 35 套 ， 18 天 完成 ， 实际 少 用 3 天 完成 了 任务 ． 实际 每天 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22057", "content": "一 场 足球赛 的 票价 为 240 元 ， 因为 票 很 紧张 ， 涨价 20% ， 涨价 后 的 票价 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22059", "content": "幸福村 要 修 一条 乡村 公路 ， 预计 每天 修 240 米 ， 15 天 就 能 完成 ； 如果 12 天 修 完 这 条 公路 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22110", "content": "服装厂 要 加工 一批 儿童服装 ， 如果 每套 用布 1.65 米 ， 可以 加工 450 套 ． 如果 每套 用布 1.5 米 ， 可以 加工 多少 套 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22148", "content": "在 一条 公路 的 一边 ， 每隔 4 米 栽 一棵树 ， 一共 栽 了 200 棵 树 ， 这 条 路 全长 有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22153", "content": "妈妈 拿 20 元 买 了 3 千克 苹果 ， 找回 9.2 元 ． 每千克 苹果 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22183", "content": "姐姐 的 年龄 比 小 红 大 (1/6) ， 小 红 比 姐姐 小 2 岁 ． 小 红 今年 多少岁 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22186", "content": "放寒假 了 ， 叔叔 送给 强强 一本 有 许多 个 故事 的 书 ， 强强 计划 每天 看 同样 个数 的 故事 ， 用 20 天 可 看 完 ． 但 强强 在 看书 时 发现 故事 很 有趣 ， 实际 每天 比 原 计划 多 看 3 个 故事 ， 结果 提前 4 天 看 完 了 故事书 ． 这本 故事书 一共 有 多少 个 故事 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22195", "content": "一 个 农场 计划 28 天 完成 收割 任务 ， 由于 每天 多 收割 7 公顷 ， 结果 18 天 就 完成 了 任务 ． 实际 每天 收割 多少 公顷 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22202", "content": "建筑 一座 楼房 ， 实际 投资 840 万元 ， 超过 计划 5% ， 计划 投资 多少 万元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22220", "content": "某 希望 小学 有 男生 120 人 ， 女生 人数 比 男生 多 (1/4) ， 学校 里 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "22239", "content": "一 张 光盘 能 刻录 资料 600 兆 ， 现已 用 它 的 80% ， 还 剩下 多少 兆 空白 部分 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22255", "content": "一 个 长方形 宽 是 4 分 米 ， 长 是 宽 的 3 倍 ， 这个 长方形 的 面积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "22259", "content": "果园 里 有 桃树 42 棵 ， 桃树 的 棵 树 是 苹果树 的 (6/7) ， 苹果树 有 多少 棵 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22294", "content": "有 一桶 油 ， 第一次 用 去 20% ， 第 二 次 又 用 去 (2/5) 千克 ， 两次 一 共用 去 3.6 千克 ． 这 桶 油 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22332", "content": "某 电器 有限公司 要 生产 5000 台 彩电 迎接 建国 60 周年 庆典 ， 前 5 天 平均 每天 生产 400 台 ． 余下 的 要 在 6 天 内 完成 ， 平均 每天 应 生产 多少 台 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22380", "content": "植物园 上午 有 游客 935 人 ， 中午 有 357 人 离去 ， 下午 又 来 了 397 人 ， 这时 园内 有 游客 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22395", "content": "李 阿姨 花 了 120 元 钱 买 了 3 箱 苹果 ， 每箱 苹果 多少 元 钱 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22396", "content": "第 16 届 亚运会 于 2010 年 11 月 12 日 至 27 日 再 中国 广州 进行 ， 广州 是 中国 第 二 个 取得 亚运会 主办权 的 城市 ． 届时 广州 的 体育馆 数量 达 72 个 ， 比 原来 体育馆 数量 增加 20% ， 广州 原有 体育馆 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22444", "content": "笑笑 有 4 件 上衣 ， 2 条 裙子 ， 她 有 多少 种 不同 的 穿 法 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22574", "content": "甲 、 乙 两车 从 a 、 b 两地 同时 相向 而 行 ， 甲 车 每 小时 开 60 km ， 乙 车 从 b 地 开 到 a 地 需 4 小时 ． 两车 相遇 时 ， 甲 、 乙 两车 行驶 的 路程 比 是 3 ： 5 ， 相遇 时 甲 车 行驶 了 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22584", "content": "甲 、 乙 两 人 在 周长 为 200 米 的 圆形 跑道 的 同一 地点 同时 起跑 ， 甲 每秒 跑 6 米 ， 乙 每秒 跑 4 米 ， 经过 多少 秒钟 ， 甲 比 乙 多 跑 一圈 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22620", "content": "修 一条 450 千米 的 公路 ， 已 修好 (4/15) ， 还 剩 多少 千米 没 修 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22633", "content": "小 明 今年 14 岁 ， 爷爷 的 年龄 比 小 明 的 5 倍 小 4 岁 ， 爷爷 今年 多少岁 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22667", "content": "一 个 厂 计划 全年 生产 洗衣机 6 万台 ， 实际 生产 了 7.2 万台 ， 超过 了 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22672", "content": "聪聪 要 看 一本 484 页 的 书 ， 他 每天 看 86 页 ， 看 了 5 天 ， 还 剩下 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22682", "content": "甲 数 的 (2/5) 是 乙 数 的 (5/6) ， 乙 数 是 12 ， 甲 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22714", "content": "修 一条 200 米 的 路 ， 前 6 天 修 了 全长 的 15% ， 照 这样 计算 ， 修 完全 程 还要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22726", "content": "两个 修路 队 合 修 一条 公路 ． 甲队 修 了 全长 的 (4/9) ， 乙 队 比 甲队 多 修 了 (1/9) ． 乙 队 修 了 这 条 公路 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "22739", "content": "李 刚 家 要 栽种 一批 树苗 ， 这种 树苗 的 成活率 一般 为 75% - 80% ， 如果 要 栽 活 1500 棵 树苗 ， 那么 至少 应 栽 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22775", "content": "六年级 同学 上山 植 松树 96 棵 、 柏树 24 棵 ． 松树 的 棵 数 是 柏树 的 多少倍 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22821", "content": "一 个 卷烟厂 上 月 香烟 的 销售额 为 1600 万元 ． 如果 按 销售额 的 56% 缴纳 消费税 ， 上 月 应 缴纳 消费 税款 多少 万元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22852", "content": "老 5 屯 今年 修 了 4 条 水渠 ， 总长 1608 米 ， 等于 去年 修 的 3 倍 ． 今年 比 去年 多 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22913", "content": "水果店 运 来 苹果 120 千克 ， 梨 相当于 苹果 的 80% ， 是 桔子 的 75% ． 桔子 重 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22928", "content": "修 一条 路 ， 第一天 修 了 全长 的 (1/5) ， 第 二 天 修 了 全长 的 (1/4) ， 两天 一共 修 了 1800 米 ， 这 条 路 有 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22981", "content": "从 甲地 到 乙 地铺 一条 长 840 米 的 路 ， 铺 了 24 天 后 离 乙地 还有 240 米 ， 平均 每天 铺 了 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22994", "content": "商店 出售 一种 电视机 ， 原价 1540 元 ， 现在 降低 了 (4/11) ， 降低 了 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "23017", "content": "一 个 平行四边形 的 面积 是 4.8 平方分米 ， 高 是 1.2 分 米 ， 底 = 多少 分 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23027", "content": "一 条 水渠 ， 已经 修 了 5.6 千米 ， 未 修 的 是 已修 的 2.7 倍 ， 这 条 水渠 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "23054", "content": "我国 第一 长河 - - 长江 全长 6380 km ， 黄河 比 长江 的 (9/10) 要 短 278 km ． 黄河 全长 多少 千米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "23066", "content": "一 本 文艺 书 ， 小 明 第一天 看 了 全书 的 (1/3) ， 第 二 天 看 了 余下 的 (3/5) ， 还 剩下 48 页 ， 这 本书 共有 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "23085", "content": "学校 建 综合楼 ， 实际 投资 170 万元 ， 比 计划 节约 了 15% ， 计划 投资 多少 万元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23131", "content": "每包 30 本 ， 一共 要 寄 240 本书 ， 需要 几包 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23146", "content": "广场 新种 了 一批 花木 ， 其中 (5/16) 是 玫瑰 ， (3/8) 是 月季 ． 已知 月季 有 36 棵 ， 玫瑰 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15653", "content": "父亲 与 儿子 的 年龄 和 是 70 岁 ， 父亲 的 年龄 比 儿子 的 年龄 的 3 倍 少 6 岁 ． 今年 儿子 多少岁 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10235", "content": "星期天 ， 6 个 同学 们 去 参观 博物馆 ， 共 付 门票 36 元 ， 每人 乘车 用 3 元 ． 他们 平均 每人 用 多少 钱 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6799", "content": "把 5 千克 大米 平均 分成 10 份 ， 每份 是 它 的 多少 （ 写 分数 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "22760", "content": "学校 图书馆 有 180 本 科技 书 ， 连环画 占 故事书 的 (2/5) ， 科技 书 占 连环画 的 (1/6) ， 图书馆 有 多少 本 故事书 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12508", "content": "一 个 加数 是 256 ， 另 一个 加数 是 308 ， 和 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "3602", "content": "一 本 故事书 有 280 页 ， 亮 亮 已经 看 了 5 天 ， 平均 每天 看 20 页 ， 剩下 的 每天 比 原来 多 看 10 页 ， 看 完 这本 故事书 还要 多少 天 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "8525", "content": "图书室 借出 156 本 卡通 书 ， 还 剩 78 本 ， 现在 又 还 回 45 本 ． 现在 图书室 有 多少 本 卡通 书 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18764", "content": "泰山 服装厂 2006 年 每 做一套 衣服 用布 2.6 米 ． 今年 采用 了 新 的 裁剪 方法 ， 每套 可 节省 用布 0.2 米 ． 原来 做 1200 套 衣服 的 布料 ， 现在 可以 做 多少 套 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2331", "content": "一 个 学生 在 一次 爬山 活动 中 ， 上 下山 共用 2 小时 ， 如果 他 上山 用 1.2 小时 ， 按 原 路 下山 ， 速度 是 每 小时 3.75 千米 ， 这个 学生 上山 的 速度 是 每 小时 多少 千米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10971", "content": "今年 春天 ， 育才 小学 中年级 4 个 班 和 高年级 6 个 班 共 植树 1018 棵 ． 中年级 平均 每班 种 52 棵 ， 高年级 平均 每班 种树 多少 棵 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14265", "content": "小利 骑车 送 盒饭 ， 中午 送 了 34 份 盒饭 ， 晚上 比 中午 多 送 了 27 份 ． 他 这天 一共 送 了 多少 份 盒饭 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19295", "content": "筑路 队 修 一条 公路 ， 第一周 修 了 (13/14) 千米 ， 比 第 二 周 少 修 (1/5) 千米 ． 两周 一共 修 了 多少 千米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20089", "content": "某村 运 来 化肥 3600 千克 ， 其中 的 (2/5) 分给 9 个 专业户 ． 平均 每户 分 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10847", "content": "新星 机械 制造厂 平均 每天 制造 机器 28 台 ， 15 天 共 制造 机器 多少 台 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "22313", "content": "快车 和 慢车 同时 从 相距 630 千米 的 两 城市 相对 开出 ， 快车 每 小时 行 70 千米 ， 慢车 的 速度 是 快车 的 80% ， 开出 几小时 后 两车 相遇 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11500", "content": "某 商场 一天 共 卖出 服装 240 件 ， 已知 卖出 的 男装 与 女装 的 件数 比 是 5 ： 3 ． 女装 比 男装 少 卖出 多少 件 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "14700", "content": "阳光 工程队 计划 修 一条 长 6525 米 的 公路 ， 计划 29 天 修 完 ， 实际 提前 4 天 完成 ， 实际 每天 比 计划 每天 多 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11395", "content": "快车 和 慢车 同时 从 相距 450 千米 的 两城 相对 开出 ， 4.5 小时 后 两车 还 相距 90 千米 ， 快车 和 慢车 的 速度 比 为 9 ： 7 ， 慢车 每 小时 行 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "14284", "content": "用 一张 长 18 厘米 ， 宽 8 厘米 的 长方形 纸 围成 一个 最大 的 圆柱 ， 圆柱 的 侧 面积 = 多少 平方厘米 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17120", "content": "商店 运 来 120 台 彩电 ， 第一天 卖出 总数 的 (1/4) ， 还 剩下 多少 台 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8845", "content": "一 本书 共 100 页 ， 小 明 一 看 了 全书 的 (3/5) ， 再 从 第 多少 页 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18821", "content": "王 华以 每 小时 4 千米 的 速度 从 家 去 学校 ， (1/6) 小时 行 了 全程 的 (2/3) ， 王 华 家 离 学校 有 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17365", "content": "同学 们 要 植 85 棵 树 ， 已经 植 了 15 棵 ， 剩下 的 树苗 平均 分给 7 个 小组 ， 每个 小组 还要 植 多少 棵 树 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22441", "content": "冬冬 1 分钟 做 9 道口 算题 ， 如果 做 54 题 ， 需要 多少 分钟 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17473", "content": "某 商品 按 定价 的 95% 卖出 可 得 利润 84 元 ， 若 按 定价 的 80% 出售 ， 则 亏损 36 元 ， 则 商品 的 购入 价 = 多少 元 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "7987", "content": "一 批 货物 计划 按 5 ： 7 分配 给 甲乙 两个 运输队 ． 实际 乙 队 运 了 840 吨 ， 完成 本 车队 任务 的 80% ， 后 因 另 有 任务 调 走 ， 其余 的 全部 由 甲队 运 完 ， 甲队 实际 运 了 多少 吨 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "4709", "content": "小强 的 爸爸 每天 步行 去 上班 ， 平均 每分钟 走 91 米 ， 需要 走 18 分钟 ， 小强 家 到 爸爸 单位 有 多 远 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "11152", "content": "小 明 今年 12 岁 ， 爷爷 的 年龄 是 他 的 6 倍 多 7 岁 ， 爷爷 今年 多少岁 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16822", "content": "如果 一个 圆锥 的 底 面积 和 高 都 缩小 2 倍 ， 那么 体积 缩小 原来 的 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9164", "content": "已知 两个 因数 的 积 是 4.89 ， 其中 一个 因数 是 1.5 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9173", "content": "小 王 打 一份 稿件 ， 上午 打 了 2000 个 字 ， 下午 打 了 1500 个 字 ， 还 剩 12.5% 没有 打 ， 这份 稿件 共有 多少 个 字 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12827", "content": "在 800 米 比赛 中 ， 刘 刚跑 了 全程 的 (11/16) ． 他 离 终点 还有 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11797", "content": "学校 今年 植树 120 棵 ， 比 去年 的 (3/5) 多 6 棵 ， 去年 植树 多少 棵 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3352", "content": "一 架 钢琴 ， 降价 20% ， 刚好 降价 1700 元 ． 这 架 钢琴 原价 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13124", "content": "妈妈 将 5000 元 人民币 存入 银行 定期 1 年 ， 年利率 为 2.52% ， 利息税 为 5% ， 到期 后 ， 妈妈 可 从 银行 取回 本金 和 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "8238", "content": "小 丽 把 2000 元 存 人 银行 ， 定期 2 年 ， 年 利息 是 3.25% ， 到期 需 支付 20% 的 利息税 ， 问 ： 到期 后 她 可以 拿到 税后 利息 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "6345", "content": "2013 年 10 月 新华书店 卖 了 120 本 《 动物 世界 》 ， 比 卖 的 《 中国 民间故事 》 多 (1/4) ， 新华 俗 点 卖 了 多少 本 《 中国 民间故事 》 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7713", "content": "同学 们 做操 ， 每 25 人 排成 一排 ， 男生 排 了 30 排 ， 女生 排 了 28 排 ． 男生 比 女生 多 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18143", "content": "用 (9/5) 去除 45 个 (1/5) - 4 的 差 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9600", "content": "3 ^ 2 * 5 = ．", "knowledge": ["*", "^"], "difficulty": 0.1, "length": 5}
-{"question_id": "19317", "content": "我校 “ 快乐 活动 日 ” 的 手工 制作 社团 有 男生 24 人 ， 女生 28 人 ， 做 手工 时 ， 每 4 人 分成 一个 小组 ， 一共 可以 分成 多少 个 小组 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11108", "content": "两个 底 面积 相等 的 圆柱 ， 一个 圆柱 的 高 是 4 分 米 ， 体积 是 32 立方分米 ． 另 一个 圆柱 的 高 是 3.5 分 米 ， 它 的 体积 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4784", "content": "一 件 衣服 34 元 ， 比 原来 便宜 15% ， 比 原来 便宜 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4805", "content": "某 车间 更新 机器 后 ， 9 天 共 节约用电 261 千瓦时 ， 平均 每天 节约用电 多少 千瓦时 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16025", "content": "服装厂 生产 一批 服装 ， 已经 生产 了 计划 的 80% ， 如果 再生产 200 套 ， 就 超额完成 了 (1/5) ， 实际 生产 了 多少 套 服装 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19840", "content": "多少 的 36% 是 1.8 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20553", "content": "甲 数 是 5.08 ， 比 乙 数 大 0.99 ， 乙 数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14158", "content": "一 条 公路 ， 已经 修好 了 5.8 千米 ， 未 修 的 比 已修 的 5 倍 还 多 0.12 千米 ， 这 条 公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "14902", "content": "服装厂 第一 车间 有 工人 150 人 ， 第 二 车间 的 人数 正好 是 第一 车间 的 (2/5) ， 两个 车间 的 人数 正好 是 全厂 工人 数 的 (5/6) ， 两个 车间 共有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22116", "content": "一 根 电线 ， 第一次 截去 60 米 ， 第 二 次 截去 80 米 ． 两次 截去 了 全长 的 (2/7) ． 这根 电线 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "12817", "content": "7.5 与 0.65 的 和 比 他们 的 差 大 多少 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "15060", "content": "红星 机床厂 去年 原 计划 每月 生产 机床 125 台 ， 实际 头 10 个 月 就 超过 计划 30 台 ． 实际 每月 生产 机床 多少 台 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3344", "content": "商场 购进 400 条 毛巾 ， 按 每 条 6 元 出售 ， 卖出 了 (4/5) 后 ， 发现 非常 畅销 ， 于是 商场 决定 余下 的 毛巾 提价 销售 ， 每 条 售价 比 原来 贵 (1/3) ， 余下 的 毛巾 能 卖 多少 钱 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "2447", "content": "一 块 棉花 地 3 亩 ， 产 皮棉 210 千克 ， 另 一块 比 它 多 2 亩 ， 平均 每 亩产 皮棉 68 千克 ， 两块 地 平均 每 亩产 多少 千克 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "20996", "content": "a 、 b 两 城市 间 相距 420 千米 ， 一辆 汽车 从 a 城 开往 b 城 ， 已 行驶 了 全程 的 (5/7) ， 此时 还要 行驶 多少 千米 才 到达 b 城 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1323", "content": "有 一桶 油 ， 重 100 千克 ， 第一次 取出 总数 的 10% ， 第 二 次 取出 总数 的 11% ， 这 桶 油 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13566", "content": "某 品牌 电脑 原来 每 台 售价 7000 元 ， 现在 降价 (1/5) ， 现在 每 台 售价 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11008", "content": "汽车 上山 的 速度 为 每 小时 36 千米 ， 行 了 5 小时 到达 山顶 ， 下山 时 按 原 路 返回 只用 了 4 小时 ． 汽车 下山 时 平均 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20231", "content": "在 “ 华 杯赛 ” 中 ， 李 静 做 对 了 16 题 ， 占 总 题 数 的 (4/5) ， 王明 做 对 的 占 总 题 数 的 (3/4) ， 王明 做 对 了 几题 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11460", "content": "小 明 有 20 元 ， 小 华 对 小 明说 “ 我 的 钱 是 你 的 钱 的 (4/5) ” ． 小 华 有 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13401", "content": "商店 卖出 12 盒 羽毛球 ， 每盒 5 筒 ， 每 筒 6 个 ， 一共 卖出 多少 个 羽毛球 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7968", "content": "方方 的 奶奶 带 了 20 元 钱 去 买 花 鲢鱼 ． 每千克 花 鲢鱼 8.6 元 ， 买 了 1.9 千克 ， 还 剩 多少 钱 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "22400", "content": "张老师 到 银行存款 4500 元 ， 年利率 是 2.25% ， 扣除 20% 利息税 ， 一年 后 取回 本息 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "2855", "content": "为了 节约用电 ， 电力部门 规定 ， 电费 每 度 0.475 元 ， 一个 用户 每月 用电量 超过 60 度 ， 超过 部分 每 度 另加 0.04 元 ， 超过 100 度 的 部分 ， 每 度 另 价 0.06 元 ． 小 明 家 上 月 用电 90 度 ， 那么 ， 小 明 家 上 月 应 缴 电费 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "7821", "content": "72 的 12 倍 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "18006", "content": "张 军 带 了 35 元 钱 去 买 文具 ， 买 铅笔 用 去 了 所 带 钱 的 (4/7) ， 余下 的 钱 正好 买 6 块 同样 的 橡皮 ． 每块 橡皮 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "867", "content": "有 一片 长 96 米 、 宽 58 米 的 长方形 阔叶林 ． 如果 每 1 方 米 阔叶林 每天 能 制造 氧气 75.9 克 ， 这 片 阔叶林 每天 能 制造 氧气 多少 克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12713", "content": "甲 、 乙 两地 相距 480 千米 ， 快车 从 甲地 ， 慢车 从 乙地 ， 同时 出发 ， 已知 快车 每 小时 行 70 千米 ， 慢车 每 小时 行 50 千米 ， 两车 在 途中 丙 地 相遇 ， 问 丙 地 与 甲地 相距 多少 千米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17337", "content": "王 叔叔 看中 一套 运动装 ， 标价 200 元 ， 经过 还价 ， 打 0.85 买 到 ， 王 叔叔 买 这 套 运动装 实际 付 了 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14144", "content": "1456 - 299 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "20099", "content": "一 盒 牛奶 ， 喝 了 (2/5) ， 剩下 的 比 喝 了 的 多 多少 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16880", "content": "甲 数 是 30 ， 乙 数 比 甲 数 的 4 倍 多 10 ， 乙 数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "11593", "content": "把 2 支 红 铅笔 和 8 支 粉 铅笔 放进 一个 布袋 里 ， 每次 从 布袋中 摸 出 1 支 （ 摸 出 后 放 回 ） ， 摸 20 次 ， 摸 出 红 铅笔 的 次数 大约 占 总 次数 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17056", "content": "啦啦队 有 28 位 同学 ， 至少 要 准备 多少 套 队服 ， 才能 保证 至少 有 一个 队员 能 分 到 两套 队服 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "21440", "content": "一 袋 面粉 重 90 千克 ， 用 去 了 它 的 (5/6) ， 还 剩下 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9234", "content": "百货商店 卖出 4 箱 帽子 ， 每箱 20 顶 ， 一共 卖 了 480 元 ． 每 顶 帽子 多少 元 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1556", "content": "组装 一批 电脑 ， 已 装 了 总数 的 40% ， 剩下 的 比 已 装 的 多 500 台 ． 这 批 电脑 共有 多少 台 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "566", "content": "有 一批 零件 共 714 个 ， 原 计划 48 天 完成 ， 实际 少 用 了 6 天 ， 实际 每天 做 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6259", "content": "把 525 张 照片 平均 存放 在 5 本 档案 相册 里 ， 每 本 相册 存放 多少 张 照片 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12704", "content": "小林 的 体重 是 34.5 千克 ， 小强 比 小林 的 2 倍 少 11.8 千克 ． 小强 的 体重 = 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12844", "content": "一 个 等腰 梯形 的 上 底 是 8 厘米 ， 下 底 是 12 厘米 ， 腰 是 9 厘米 ， 围成 这个 等腰 梯形 至少 要 多少 厘米 长 的 铁丝 ．", "knowledge": ["+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1319", "content": "一 辆 送 货车 拉 了 490 箱 面包 ， 平均 送到 8 个 商店 后 ， 还 剩 10 箱 ， 平均 每个 商店 送 几箱 面包 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19804", "content": "商场 购进 一批 汽车 玩具 ， 进价 每个 24 元 ， 售价 每个 30 元 ， 售完 后 盈利 360 元 ． 这 批 汽车 玩具 有 多少 个 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3976", "content": "有 150 袋 水泥 ， 有 汽车 运走 了 这些 水泥 的 (2/5) ， 运走 了 多少 袋 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4584", "content": "水族馆 的 两个 水管 同时 向 池 中 放水 ， 大 管 每 小时 放水 15 吨 ， 小 管 4 小时 放水 52.4 吨 ， 经过 8 小时 把 水池 放满 ， 这个 水池 能 装 水 多少 吨 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13244", "content": "爱民 小学 有 男同学 619 人 ， 比 女同学 少 58 人 ， 爱民 小学 一共 有 学生 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "12998", "content": "小巧 用 8 颗 围棋子 放在 桌子 上 排成 一行 ， 每 两颗 围棋子 之间 都 相隔 5 厘米 ， 从 第一颗 围棋子 到 最后 一颗 之间 一共 相隔 多少 厘米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21312", "content": "被减数 是 713 ， 差 是 524 ， 减数 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "16827", "content": "在 一个 比例 中 ， 两个 内 项 的 积 是 (2/3) ， 其中 一个 外 项 是 (1/3) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15165", "content": "王 叔叔 卖 梨 、 苹果 、 桔子 3 种 水果 ， 它们 的 重量 比 是 3 ： 4 ： 6 ， 其中 桔子 比 苹果 多 80 千克 ， 梨 有 多少 千克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19168", "content": "（ 341 + □ ） * 7 = 2821 ， □ = ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4741", "content": "一 台 压路机 的 滚筒 长 1.6 米 ， 直径 是 0.5 米 ． 这 台 压路机 滚动 一周 压 过 的 路面 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "8507", "content": "南门 水果店 运 来 一批 柑桔 ， 如果 卖出 这 批 柑桔 的 40% 后 ， 还 剩下 282 千克 ； 如果 卖出 这 批 柑桔 的 65% 后 ， 还 剩下 多少 千克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "6804", "content": "一 个 修路 队 有 8 个 工人 ， 4 月份 修路 480 米 ， 比 3 月份 少 修 160 米 ． 这 两个 月 一共 修路 多少 米 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22387", "content": "一 条 走廊 长 24 米 ， 每隔 3 米 放 一 盆花 ， 走廊 两端 都 要 放 ． 一共 要 放 多少 盆花 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7128", "content": "为 添置 教学设备 ， 学校 去年 支出 了 20000 元 ， 比 今年 支出 的 (4/5) 少 120 元 ． 今年 支出 多少 元 ？ ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1926", "content": "校服 秋装 每套 58 元 ， 冬装 每套 82 元 ． 4 甲班 共有 学生 30 名 ， 每人 各 订 一套 秋装 和 冬装 ， 共 需 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16477", "content": "甲 、 乙 两地 相距 56 千米 ， 汽车 行 完全 程 需 1.4 小时 ， 步行 要 14 小时 ． 一个 人 由 甲地 出发 ， 步行 3.5 小时 后 改乘 汽车 ． 他 到达 乙地 总共 用 几小时 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "2111", "content": "买 一支 圆珠笔 3 元 钱 ， 钢笔 的 价钱 是 圆珠笔 的 6 倍 ， 买 一支 钢笔 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16438", "content": "一 个 水池 眼睛 灌 了 (5/8) 池 的 水 ， 还要 灌 多少 池 的 水 才 满 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "13717", "content": "中央 电视塔 高 405 m ， 上海 东方明珠 电视塔 比 中央 塔高 (7/45) ． 东方明珠 电视塔 高 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14315", "content": "把 一个 小数 扩大 100 倍 得 3.6 ， 原来 的 小数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "12237", "content": "水果店 要 用 2 辆车 运进 76 箱 苹果 ， 每箱 18 千克 ， 平均 每辆车 运 多少 千克 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20727", "content": "由 40 名 同学 组成 的 夏令营 在 一次 射击训练 中 ， 每人 射击 10 发 子弹 ， 共有 78 发 子弹 脱靶 ． 这次 射击训练 的 命中率 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16326", "content": "儿童节 那天 ， 老师 把 一些 糖果 平均 分给 39 个 小朋友 ． 每人 分 到 3 颗 ， 还 剩 30 颗 ． 一共 有 多少 颗 糖果 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "19042", "content": "一 个数 减去 24.8 与 18.6 的 和 得 65.9 ， 求 这个 数 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21057", "content": "在 7 * （ 253 - 12 ） 的 算式 中 ， 应 先 算 多少 法 ， 在 算 多少 法 ， 结果 = ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20251", "content": "招待所 用 500 元 钱 买 15 床 毛巾被 ， 还 剩 20 元 钱 ． 平均 每 床 毛巾被 的 价格 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19169", "content": "一 个 机关 精简 后 有 工作人员 120 人 ， 比 原来 少 了 40 人 ， 原来 有 工作人员 多少 人 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "12865", "content": "食堂 买 回 3 袋 大米 ， 每 袋 50 千克 ． 每千克 2 元 ， 一共 需要 多少 钱 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "12686", "content": "新华书店 售书 ， 售出 的 科技 书 是 故事书 的 (4/5) ， 连环画 是 故事书 的 (8/9) ， 售出 连环画 240 本 ， 售出 科技 书 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6596", "content": "一 块 菜地 长 8 米 、 宽 5 米 ， 平均 每平方米 收 菜 16 千克 ， 在 这块 地里 一共 收 菜 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "7182", "content": "一 个数 的 62 倍 是 2356 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19053", "content": "374 与 426 的 和 ， 除以 16 ， 商 = ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22431", "content": "甲乙 两艘 客轮 同时 从 上海 和 武汉 分别 开出 ， 相向 而 行 ， 全长 1100 千米 ， 经过 25 小时 相遇 ． 相遇 时 甲 船 行驶 了 500 千米 ． 乙 船 平均 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11331", "content": "一 桶 油 ， 用 去 它 的 (3/7) ， 正好 用 去 24 千克 ， 这 桶 油 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "808", "content": "有 3 个 小组 ， 每组 2 人 ． 植树节 共 植树 102 棵 ， 平均 每人 植树 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11200", "content": "某 加油站 有 汽油 7500 升 ， 用 去 (4/5) ， 用 去 多少 升 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9610", "content": "六年级 一班 有 学生 45 人 ， 上 学期 期末 跳远 测验 有 80% 的 同学 及格 ． 不及格 的 有 多少 人 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16740", "content": "一 份 周报 1.5 元 ， 一份 晚报 0.5 元 ， 田 爷爷 的 报摊 昨天 卖出 85 份 周报 和 若干份 晚报 ， 共 收款 230 元 ． 田 爷爷 昨天 卖出 多少 份 晚报 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5671", "content": "某 银行 为 每 名 职工 订做 了 一套 统一 的 制服 ， 其中 女职工 45 人 ， 男 职工 24 人 ， 每套 制服 320 元 ， 订做 这些 服装 一共 要 用 多少 元 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7697", "content": "一 堆 沙子 用 去 20% ， 还 剩下 1120 吨 ， 这 堆 沙子 有 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21002", "content": "学校 有 一个 面积 是 360 平方米 的 长方形 绿化带 ， 长 40 米 ， 宽 = 多少 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18343", "content": "王 叔叔 开车 从 甲地 到 乙地 ， 原 计划 每 小时 行 84 km ， 这样 需要 5 时 才能 到达 ； 实际 每 时 行 120 km ， 这样 比 原 计划 提前 多少 时 到达 乙地 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10521", "content": "小 丽 的 体重 是 40 千克 ， 小强 比 她 重 (1/5) ， 小强 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9556", "content": "每 2 人 下 一盘 象棋 ， 5 个人 一共 要 下 多少 盘 象棋 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3684", "content": "小 明 看 一本 故事书 ， 已经 看 了 全书 的 40% ， 再 看 30 页 就 全部 看 完 ， 这本 故事书 共 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22169", "content": "饲养 小组 养 32 只 白兔 ， 26 只 黑 兔 ， 养 的 灰 兔 比 白兔 的 只 数 少 18 只 ， 养 灰 兔 多少 只 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "4438", "content": "一 个数 除以 55 ， 商 是 160 ， 这个 数 = ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2212", "content": "一 只 蜜蜂 0.5 小时 飞行 9.3 千米 ， 是 一只 蝴蝶 飞行速度 的 2.4 倍 ． 这 只 蝴蝶 每 小时 飞行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18695", "content": "钢铁厂 计划 全年 生产 钢 235.8 万吨 ， 结果 上半年 生产 了 115.7 万吨 ， 下半年 生产 了 129.9 万吨 ． 全年 超过 计划 多少 万吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5515", "content": "一 片 果园 中 ， 苹果树 占 (4/9) ， 桃树 占 (2/9) ， 其余 的 是 山楂树 ， 山楂树 占 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5601", "content": "明明 做 口 算 前 3 分钟 平均 每分钟 做 8 题 ， 后 2 分钟 一共 做 了 21 题 ， 明明 平均 每分钟 做 多少 题 口 算 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15689", "content": "一 种 商品 降价 15% 后 价格 是 34 元 ． 这种 商品 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4665", "content": "小 敏 和 小 江 背对背 站立 ， 小 敏 向北走 150 米 ， 小 江 向南走 120 米 ， 两 人 相距 多少 米 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "5107", "content": "小苗 看 一本 105 页 的 书 ， 第一天 看 了 10 页 ， 第 二 天 看 的 页数 是 第一天 的 3 倍 ， 第 3 应从 多少 看 起 ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "7773", "content": "我国 是 世界 上 最 缺水 的 国家 之一 ， 世界 人均 淡水 资源 9200 立方米 ， 我国 人均 淡水 资源 比 世界 人均 淡水 资源 少 (3/4) ． 我国 人均 淡水 资源 为 多少 立方米 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3952", "content": "一 本 《 黑猫 警长 》 比 一本 《 花仙子 》 便宜 0.5 元 钱 ， 一本 《 喜 羊 羊 与 灰 太 狼 》 比 一本 《 黑猫 警长 》 贵 3.8 元 钱 ． 已知 一本 《 花仙子 》 的 售价 是 4.8 元 ， 一本 《 喜 羊 羊 与 灰 太 狼 》 多少 元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19967", "content": "一 个 足球 的 价钱 是 105 元 ， 是 一个 排球 价钱 的 3 倍 ． 一个 足球 比 一个 排球 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1973", "content": "食堂 运 来 一批 大米 ， 第一天 吃 了 30% ， 第 二 天 吃 了 (1/5) ， 还 剩下 1200 千克 ， 这 批 大米 共有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11546", "content": "四年级 同学 排队 做操 ， 站 成 16 行 ， 每行 15 人 ． 如果 每行 20 人 ， 可以 站 几行 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17980", "content": "两艘 军舰 从 相距 609 千米 的 两个 港口 同时 相对 开出 ， 一艘 军舰 每 小时 行 42 千米 ， 另 一艘 军舰 每 小时 行 45 千米 ， 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20914", "content": "妈妈 买 回 苹果 和 橘子 各 5 千克 ， 付出 25 元 ， 找回 4.5 元 ， 每千克 苹果 2.5 元 ， 那 妈妈 买 的 橘子 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5496", "content": "一 个 筐 里 有 6 个 苹果 、 5 个 桃 和 7 个 梨 ． 小 华 从 这 3 种 水果 中 各 取 一个 ， 有 多少 种 取法 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11728", "content": "乐东 要 把 3.6 米 长 的 木条 锯 成 相等 的 15 段 ， 已知 每 锯 一次 需 4 分钟 ， 把 这根 木条 锯 完 需要 多少 分钟 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15310", "content": "市中心 体育馆 原来 有 58 排座位 ， 平均 每 排座位 可 坐 160 人 ； 改建 后 增加 到 98 排座位 （ 每 排座位 不变 ） ， 改建 后 比 原来 增加 了 多少 个 座位 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9565", "content": "杏山 果园 去年 收获 苹果 20000 千克 ， 今年 比 去年 增长 了 10% ， 今年 收获 苹果 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "8677", "content": "服装厂 每天 生产 500 套 西装 ， 比 计划 每天 增产 100 套 ， 实际 比 计划 每天 增产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10114", "content": "一 根 绳 20 米 ， 第一次 用 去 12 米 ， 第 二 次 用 去 全长 的 (1/5) ， 第一次 用 去 全长 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16193", "content": "一 辆 汽车 (2/3) 小时 行驶 28 千米 ， 1 小时 行驶 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11696", "content": "宝山 小学 有 700 名 学生 ， 280 人 毕业 后 ， 又 新 招 了 350 名 新生 ． 这时 宝山 小学 学生 数 比 原来 增加 了 百分之几 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "12059", "content": "某 工地 需要 94 吨 沙子 ， 用 一辆 载重 4.5 吨 的 汽车 运 5 次 ， 余下 的 改用 一辆 载重 6.5 吨 的 汽车 运 ， 还要 运 多少 次 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14038", "content": "一 个 自然数 ， 把 它 扩大 10 倍 后 ， 与 原 数 之间 的 差 是 1017 ， 这个 自然数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20537", "content": "100 比 多少 多 25% ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19887", "content": "小 明 看 一本 故事书 ， 第一天 看 了 12 页 ， 第 二 天 看 了 13 页 ， 还 剩下 8 页 没有 看 ． 这本 故事书 有 多少 页 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18537", "content": "小 军 花 17 元 买 了 一 本书 ， 比 原来 便宜 15% ． 这 本书 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5743", "content": "一 件 衣服 原价 80 元 ， 打 0.8 后 的 价钱 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2125", "content": "有 两块 地 ， 第一块 收 了 8 筐 萝卜 ， 第 二 块 收 了 6 筐 萝卜 ， 平均 每 筐 重 25 千克 ． 一共 收 萝卜 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9946", "content": "书包 35.64 元 ， 文具盒 比 书包 便宜 14.36 元 ， 小 刚 同时 买 这 两种 商品 共 要 多少 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19987", "content": "一 辆 洒水车 每分钟 前进 40 米 ， 洒水 宽度 是 6 米 ， 洒水车 工作 10 分钟 ， 能 洒 多少 平方米 地面 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "2707", "content": "一 只 蜗牛 掉 进 一口 9 米 深 的 井 里 ， 它 每天 白天 爬 上 3 米 ， 夜里 又 滑 下 1 米 ， 这样 要 多少 天 ， 才 爬 出 井口 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "4168", "content": "每盒 纸巾 2.85 元 ， 小 徐 阿姨 付给 售货员 50 元 ， 找回 4.4 元 ． 她 买 了 几盒 纸巾 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19008", "content": "一 个 电视机厂 前年 生产 电视机 8000 台 ， 去年 比 前年 增产 10% ， 去年 生产 电视机 多少 台 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "1212", "content": "骑 自行车 的 速度 是 每 小时 16 千米 ， 是 汽车 速度 的 (1/6) ， 汽车 每 小时 行 多少 千米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21663", "content": "小 明 家 在 学校 的 西面 ， 小 红 家 在 学校 的 东面 ， 两 人 同时 离开 学校 ． 小 红 每分钟 行 78 米 ， 小 明 每分钟 行 95 米 ， 12 分钟 后 ， 两 人 同时 到 家 ． 小 明 家 离 学校 比 小 红 家 离 学校 远 多少 米 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "20468", "content": "小 明 打 一篇 文章 ， 每分钟 打 96 个 字 ， 15 分钟 打 完 ． 如果 想 12 分钟 打 完 ， 平均 每分钟 要 打 多少 个 字 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9109", "content": "朝晖 小学 生物 小组 的 同学 收集 标本 ， 收集 到 的 蝴蝶 是 蜻蜓 的 (2/3) ， 蜻蜓 是 甲壳虫 的 (1/4) ． 蝴蝶 有 12 只 ， 甲壳虫 有 多少 只 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19945", "content": "小 明 有 4.2 元 钱 ， 给 小 华 0.5 元 后 还 比 小 华 多 0.3 元 ， 小 华 原有 多少 元 钱 ．", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1716", "content": "364 位 同学 到 阶梯教室 观看 演出 ， 入座 后 还 剩 4 排座位 空 着 ， 每排 有 28 个 座位 ． 该 阶梯教室 共有 多少 个 座位 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4942", "content": "一 个 化肥厂 原 计划 14 天 完成 一项 任务 ， 由于 每天 多 生产 15 吨 ， 结果 9 天 就 完成 任务 ． 原 计划 每天 生产 化肥 多少 吨 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6158", "content": "甲乙 两个 仓库 存粮 吨数 的 比 为 4 ： 3 ， 从 甲 仓库 取出 45 吨 运往 乙 仓库 后 ， 甲乙 两 仓库 存粮 吨数 的 比 是 7 ： 9 ， 那么 原来 两 仓库 各 存粮 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "20652", "content": "有 甲 、 乙 两个 仓库 ， 甲 仓 的 货物 比 乙 仓 多 20 吨 ， 乙 仓 的 货物 比 甲 仓 少 (1/5) ， 甲 仓 有 多少 吨 货物 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "21481", "content": "在 一个 减法 算式 里 ， 被减数 是 差 的 5 倍 ， 已知 减数 是 16 ， 被减数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1479", "content": "用 一个 杯子 向 一个 空瓶 里 倒水 ， 如果 倒 进 3 杯水 ， 则 连 瓶 重 450 克 ； 如果 倒 进 7 杯水 ， 则 连 瓶 重 630 克 ． 每 杯水 重 多少 克 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6570", "content": "一 个 长 6 厘米 ， 宽 5 厘米 ， 高 10 厘米 的 长方体 铁盒 ， 其 容积 为 多少 立方厘米 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "16578", "content": "一 杯 糖水 ， 糖 和 水 的 比 是 1 ： 20 ， 糖 占 糖水 的   ( ( ( ) ) / ( ( ) ) ) ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1512", "content": "某校 有 2400 名 学生 ， 每 名 学生 每天 上 5 节 课 ， 每位 教师 每天 教 4 节 课 ， 每节课 是 一位 教师 给 30 名 学生 讲授 ． 那么 该校 共有 教师 多少 位 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6926", "content": "某 饮料厂 6 月份 生产 饮料 180 箱 ， 比 原 计划 超产 30 箱 ， 超产 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "23129", "content": "列式 计算 ： 8 / 2.4 的 商 ， 加上 107 的 (1/5) ， 和 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22237", "content": "一 条 路 ， 修 了 的 和 没 修 的 长度 比 是 6 ： 7 ， 又 修 了 210 千米 后 ， 修 了 的 和 没 修 的 长度 比 是 9 ： 4 ， 这 条 路 全长 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.5, "length": 13}
-{"question_id": "7039", "content": "光明 小学 上个月 共 用电 672 千瓦时 ， 这个 月 比 上个月 节约 (1/12) ． 这个 月 比 上个月 节约用电 多少 千瓦时 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "10132", "content": "一 筐 苹果 ， 连 筐 重 45.5 千克 ， 取出 一半 后 ， 连 筐 还 重 24.5 千克 ， 筐 重 多少 千克 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14563", "content": "某 玻璃厂 托运 玻璃 250 箱 ， 合同规定 每箱 运费 20 元 ， 如果 损坏 一箱 ， 不但 不 付 运费 还要 赔偿 100 元 ． 运 后 结算 时 ， 共 付 运费 4400 元 ． 托运 中 损坏 了 多少 箱 玻璃 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "16772", "content": "学校 开展 环保 扶贫 活动 ， 计划 20 天 收集 120 千克 废纸 ， 实际 每天 比 原 计划 多 收集 2 千克 ， 收集 废纸 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22297", "content": "★ ★ 一块 布 ， 王师傅 做 衣服 用 去 了 (2/5) ， 剩下 的 给 张师傅 用 ． 张师傅 第一天 就 用 去 (1/3) ， 还 剩 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1480", "content": "一 根 木条 用 去 1.3 米 ， 剩下 的 比 用 去 的 多 0.7 米 ． 这根 木条 原有 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "5116", "content": "某 商场 9 月份 营业额 是 120 万元 ， 按 营业额 的 5% 缴纳 营业税 ， 应 缴税 多少 万元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20193", "content": "甲 、 乙 两 数 的 比 是 3 ： 4 ， 乙 数 减 甲 数 得 20.5 ， 乙 数 = ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1681", "content": "某校 五年级 一班 一共 有 40 人 ， 女生 有 25 人 ． 女生 占 全班 人数 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20456", "content": "一 箱 橘子 重 24 千克 ， 卖出 (3/4) ， 卖出 了 多少 千克 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2918", "content": "小 丽 用 2 天 的 时间 做 完 了 寒假作业 的 (1/4) ， 照 这样 计算 ， 完成 这本 寒假作业 要 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8217", "content": "星光 小学 有 12 个 班 ， 每班 48 人 ． 如果 植 96 棵 树 ， 平均 多少 人 植 一棵树 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4949", "content": "自行车 3 小时 行 45 千米 ， 汽车 4 小时 行 216 千米 ． 汽车 平均 每 小时 比 自行车 平均 每 小时 多行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2921", "content": "妈妈 买 回 鸡蛋 和 鸭蛋 共 21 个 ， 其中 鸭蛋 占 (3/7) ； 后来 ， 妈妈 又 买 回 几个 鸭蛋 ， 这时 鸭蛋 占 总 蛋 数 的 (7/13) ， 后来 妈妈 又 买回来 几个 鸭蛋 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "10860", "content": "小 玲 6 分钟 走 300 米 ， 照 这样 的 速度 ， 她 从 家里 到 学校 走 15 分钟 ， 她家 到 学校 有 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3259", "content": "白兔 有 75 只 ， 黑 兔 的 只 数 是 白兔 的 (2/5) ， 黑 兔 有 多少 只 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "9471", "content": "一 辆 卡车 运 矿石 ， 晴天 每天 可 运 16 次 ， 雨天 每天 可 运 11 次 ． 这辆 车 一连几天 运 了 195 次 ， 平均 每天 运 13 次 ． 这 几天 中 ， 雨天 有 多少 天 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "2964", "content": "世界 上 最长 的 跨海大桥 是 我国 的 杭州湾 跨海大桥 ， 全长 有 36 千米 ， 大约 是 瑞安 飞云 江 大桥 的 20 倍 多 1 千米 ， 瑞安 飞云 江 大桥 大约 有 多少 千米 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21822", "content": "2.08 与 0.48 的 差 乘以 5 ， 用 所得 的 积 去除 16 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3", "content": "小 明 看 一本 故事书 ， 第一天 看 了 全书 的 (1/6) ， 第 二 天 看 了 24 页 ， 第 3 天 看 的 页数 是 前两天 看 的 总数 的 150% ， 这时 还有 全书 的 (1/4) 没有 看 ， 那么 这 本书 一共 多少 页 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "425", "content": "李 明 收集 邮票 63 枚 ， 比 王 红 多 (2/7) ， 王 红 收集 邮票 多少 枚 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8760", "content": "养鸡 厂 今年 养鸡 3600 只 ， 比 去年 增加 了 (2/7) ， 去年 养鸡 多少 只 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9685", "content": "淘气 有 300 元 钱 ， 买 书 用 去 56 元 ， 买 文具 用 去 128 元 ， 淘气 剩下 的 钱 比 原来 少 多少 元 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "4524", "content": "实验 小学 本学期 计划 招收 一年 级新生 200 人 ， 实际 招收 了 220 人 ， 超过 计划 的 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7442", "content": "铁路 小学 有 男生 450 人 ， 女生 的 人数 是 男生 的 (4/5) ． 这个 学校 共有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4452", "content": "一 个数 的 8 倍 是 160 ， 比 这个 数多 25 的 数 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21273", "content": "6 （ 2 ） 班 有 32 个 同学 ， 评选 “ 环保 卫士 ” 时 ， 要 从 5 名 候选人 中 选出 1 人 ， 每位 候选人 选 上 的 可能性 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "20770", "content": "一 个 长方形 的 面积 是 48 平方米 ． 它 的 宽 为 6 米 ， 长 为 多少 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11899", "content": "晓 明 家 5 月份 水费 比 电费 少付 48 元 ， 电费 与 水费 的 比 是 3 ： 1 ． 晓 明 家 应付 电费 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7851", "content": "超市 运 来 62 千克 的 黄瓜 ， 每千克 4 元 ； 运 来 78 千克 的 西红柿 ， 每千克 3 元 ． 要是 全 卖光 ， 超市 大约 能 卖 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "12081", "content": "妈妈 存入 银行 4000 元 钱 ， 定期 5 年 ， 年利率 是 5.63% ， 到期 时 妈妈 可 取回 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6173", "content": "大沙河 上 、 下游 相距 120 千米 ， 每天 定时 有 甲 、 乙 两艘 船速 相同 的 客轮 从 上 、 下游 同时 出发 ， 面对面 行驶 ． 假定 这 两艘 客轮 的 船速 都 是 每 小时 25 千米 ， 水速 是 每 小时 5 千米 ， 则 两艘 客轮 在 出发 后 几小时 相遇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2042", "content": "妈妈 给 我 再 银行 存入 20000 元 的 教育费 ， 定期 一年 ， 年利率 是 3.5% ， 到期 缴纳 利息税 （ 利息 的 20% ） 后 ， 本金 和 税后 利息 一共 = 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "17877", "content": "小 华 带 40 元 到 商店 买 了 两件 文具 ， 一件 14.5 元 ， 另 一件 18.8 元 ， 还 剩 几元 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6514", "content": "王 芳 看 一本 290 页 的 书 ， 计划 7 天 看 完 ． 实际 前 4 天 每天 看 了 20 页 ， 要 按计划 看 完 ， 以后 每天 应 看 多少 页 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "2306", "content": "2.5 与 18 的 积 减去 1.2 / 2.4 的 商 ， 差 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "14386", "content": "甲 、 乙 两地 相距 168 千米 ， a 、 b 两车 同时 从 甲地 开往 乙地 ， a 车 每 小时 行 39 千米 ， b 车 每 小时 行 24 千米 ， a 车 因故 在 途中 停 了 一会儿 ， 当 b 车 到达 乙地 时 ， a 车 再行 12 千米 才能 到达 乙地 ， 问 a 车 在 途中 停 了 多长时间 ？", "knowledge": ["-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9935", "content": "双休日 ， 玉 华 小学 高年级 同学 到 社区 参加 公益活动 清运 垃圾 ， 上午 运出 总量 的 35% ， 下午 运出 总量 的 30% ， 上 、 下午 共 运出 130 车 ， 剩下 的 垃圾 大约 还有 多少 车 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "16833", "content": "客车 从 甲地 开往 乙地 ， 货车 从 乙地 开往 甲地 ， 两车 同时 相向 开出 ， 12 小时 相遇 ． 相遇 后 ， 客车 又 行 了 8 小时 到达 乙地 ． 相遇 后 ， 货车 再行 几小时 到达 甲地 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13839", "content": "(1/6) + (2/7) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "6494", "content": "东村 计划 修 一条 长 1200 米 长 的 公路 ， 前 两周 已修 了 全长 的 (2/3) ， 再 修 多少 米 就 可以 修 完 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "12929", "content": "一 个 盒子 里 装有 5 个 红球 ， 2 个 黄 球 ， 3 个 白 球 ， 一次 摸 到 红球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2956", "content": "六年级 一班 男生 人数 和 女生 人数 的 比 是 3 ： 2 ， 男生 有 24 人 ， 全班 一共 有 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17896", "content": "果园 里 有 苹果树 60 棵 ， 是 桃树 棵 数 的 (2/5) ， 果园 里 有 桃树 多少 棵 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "14592", "content": "学校 北 墙 前 要 栽 月季花 ， 全长 300 米 ， 每隔 5 米 种 一株 ， 两头 不能 种花 ． 共 能 栽 多少 株 月季花 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4931", "content": "某 食堂 一月份 烧煤 1.2 吨 ， 比 计划 节约 了 (1/5) ， 节约 了 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9537", "content": "一 条 路 长 570 米 ， 已经 修 了 8 天 ， 还 剩 250 米 ． 平均 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22291", "content": "一 根 彩带 用 去 了 (5/6) 米 ， 剩下 比 用 去 的 长 (3/4) 米 ， 这根 彩带 长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6276", "content": "一 辆 汽车 每 小时 行 60 千米 ， 6 小时 行 完全 程 ． 现在 已 行 了 180 米 ， 行 完全 程 还 需要 多少 小时 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "7824", "content": "一 根 电线 用 去 它 的 (4/9) ， 还 剩下 它 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6978", "content": "甲 数 是 (4/5) ， 比 乙 数 的 4 倍 多 (3/10) ， 乙 数 = ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6495", "content": "方方 家住 在 6 楼 ， 每 两层楼 之间 有 15 级 台阶 ， 她 从 1 楼 到 家 ， 一共 要 走 多少级 台阶 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1493", "content": "一 个 比例 的 两个 内 项 互为 倒数 ， 如果 一个 外 项 是 (2/3) ， 另 一个 外 项 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19836", "content": "抗日战争 时期 王 庄 民兵 自制 一种 土 雷 ， 爆炸 时 ， 有效 杀伤 距离 是 15 米 ， 它 的 有效 杀伤 面积 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "19784", "content": "学校 买来 一批 笤帚 ， 李老师 想 平均 分给 全校 24 个 班 ， 如果 每班 分 6 把 ， 还 差 5 把 不够 分 ． 买来 的 笤帚 = 多少 把 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21380", "content": "笑笑 家 5 月份 的 支出 中 ， 房租 占 全 月 支出 的 (1/6) ， 用于 餐饮 、 水果 的 占 全 月 支出 的 (1/5) ， 这两项 支出 占 全 月 支出 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "14978", "content": "一 段 公路 ， 5 天 修 了 全长 的 (3/10) ， 平均 每天 修 了 这 段 公路 的 几分 之 几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "15026", "content": "明明 看 一本 200 页 的 书 ， 5 天 看 了 全书 的 20% ． 照 这样 计算 ， 看 完全 书 还要 几天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20866", "content": "压路机 的 滚筒式 一个 圆柱 ， 它 的 横截面 积 直径 是 1 米 ， 长 是 2 米 ， 如果 每分钟 滚 20 圈 ， 每分钟 可以 压 多长 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11550", "content": "1 千克 玉米 ， 大约 要 用 368 千克 水 浇灌 出来 ． 一家 肯德基 店 每星期 约 卖出 玉米 72 千克 ． 这些 玉米 在 生长 过程 中 大约 要 用 去 多少 千克 水 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19598", "content": "李 叔叔 带 1316 元 买 化肥 ， 买 了 16 袋 化肥 ， 还 剩 260 元 ， 每 袋 化肥 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14569", "content": "36 吨 减少 了 (2/9) 以后 ， 减少 了 多少 吨 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6731", "content": "冰 化成 水 后 ， 体积 减少 (1/11) ． 现有 一块 冰 化成 水 后 的 体积 是 4 立方厘米 ， 这 块冰 原来 的 体积 = 多少 立方厘米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20235", "content": "按 平均数 计算 ， 9 只 鸡 6 天 能 生 27 个 蛋 ， 那么 5 只 鸡 4 天 能 生 多少 个 蛋 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9324", "content": "某 服装厂 6 月份 计划 生产 服装 2500 套 ， 实际 生产 了 2700 套 ． 实际 产量比 计划 多 百分之几 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16467", "content": "银河 商场 庆元旦 进行 促销 活动 ． 原价 3500 元 的 海尔 液晶电视 ， 现在 打 0.9 出售 ， 现在 买 一台 海尔 液晶电视 比 原来 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "93", "content": "从 南京 到 连云港 的 铁路 长 568 千米 ， 两列 火车 从 两地 同时 相对 开出 ， 从 连云港 开出 的 火车 每 小时 行驶 154 千米 ， 从 南京 开出 的 火车 每 小时 行驶 130 千米 ， 两车 经过 几小时 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16930", "content": "6 （ 6 ） 班 有 48 人 ， 在 选 班干部 的 投票 中 规定 得票数 超过 (2/3) 才能 当选 ， 小 明 已经 获得 16 票 ， 他 还要 在 剩下 的 票数 中 获得 多少 票 才能 当选 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7872", "content": "商场 5 一节 促销 活动 ， 一台 彩电 原价 5200 元 ， 现在 0.85 出售 ， 这 台 彩电 现价 多少 元 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "19454", "content": "一 堆 煤 重 39.8 吨 ， 第一天 运走 12.8 吨 ， 比 第 二 天 少运 3.6 吨 ， 两天 后 还 剩 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.2, "length": 7}
-{"question_id": "1950", "content": "40 位 小朋友 站 成 人数 相等 的 两列 做操 ， 每 相邻 两位 小朋友 相隔 2 米 ， 做操 的 队伍 长 多少 米 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6510", "content": "某次 数学 测验 共 20 题 ， 做 对 一 题 得 5 分 ， 做 错 一 题 倒扣 1 分 ， 不 做 得 0 分 ． 小 华 得 了 76 分 ， 问 他 做 对 几题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9941", "content": "秭归 农场 去 年产 脐橙 2.5 万吨 ， 今年 比 去年 增加 12% ， 今年 产 脐橙 多少 万吨 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20299", "content": "联 滘 小学 共有 学生 280 ， 二年级 学生 数 是 全校学生 总数 的 (1/7) ， 二年级 有 学生 多少 人 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "2247", "content": "大酒店 门前 有 一根 圆形 柱子 ， 量 得 它 的 周长 是 31.4 分 米 ， 这根 柱子 的 直径 = 多少 分 米 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16856", "content": "学校食堂 买来 面粉 950 千克 ， 运 了 3 车 ， 还 剩 50 千克 ． 平均 每 车运 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18106", "content": "一 个数 (2/3) 的 正好 是 24 ， 这个 数 = ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "10816", "content": "甲 、 乙 两 人 在 环行 跑道 上 赛跑 ， 跑道 全长 400 米 ． 如果 甲 的 速度 为 16 米 / 秒 ， 乙 的 速度 为 12 米 / 秒 ． 两 人 同时 同 地 同 向 而 行 ， 那么 多少 秒 后 第一次 相遇 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14640", "content": "工程队 要 挖 一条 长 463 米 的 隧道 ， 前 25 天 每天 挖 7 米 ． 剩下 的 要 在 32 天 内 挖 完 ， 平均 每天 挖 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20177", "content": "2008 年 第 29 届 奥运会 在 北京 举行 ． 奥运会 彩票 收入 约 14 亿元 ， 比 电视转播 收入 少 (39/40) ， 奥运会 电视转播 收入 大约 = 多少 亿元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9144", "content": "树 人 小学 今年 对 数学 楼 进行 重新 装修 用 了 129 万元 ， 比 计划 节约 了 21 万元 ， 节约 了 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1760", "content": "一 个 三角形 与 一个 平行四边形 的 面积 相等 ． 三角形 的 面积 是 35 平方厘米 ， 平行四边形 的 高 是 7 厘米 ， 底 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "2033", "content": "某 厂 去年 上半年 生产 洗衣机 36 万台 ， 是 下半年 产量 的 (4/5) ． 这个 洗衣机 厂 去年 全年 的 产量 = 多少 万台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7294", "content": "一 种 服装 降价 20% 后 ， 售价 是 144 元 ． 这种 服装 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9717", "content": "小蚂蚁 3 分钟 爬行 (9/10) 米 ， 平均 每分钟 爬行 多少 米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8398", "content": "一 辆 汽车 上 的 油箱 里 装满 汽油 ， 用 去 40 升 汽油 后 ， 还 剩下 (3/4) ， 这个 油箱 的 容积 = 多少 升 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18133", "content": "修路 队 修筑 一条 高速公路 ， 共用 了 3.57 亿元 ， 比 计划 节省 了 15% ， 节省 了 多少 亿元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10551", "content": "胜利 街 的 一边 有 20 盏 路灯 （ 两头 不 装 ） ， 每 两盏 灯 之间 相隔 10 米 ． 胜利 街 全长 = 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17086", "content": "a / 7 = b … c ， c 最大 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8116", "content": "面粉 每千克 2.4 千克 ， 大米 每千克 2.5 元 ， 小 华 买 面粉 和 大米 各 5 千克 ， 付出 25 元 ， 应 找回 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.3, "length": 9}
-{"question_id": "2359", "content": "超市 运进 大米 425 千克 ， 卖 了 300 千克 ， 又 运 来 420 千克 ， 现在 超市 有 大米 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20982", "content": "美美 有 13 朵 红花 ， 小小的 红 花朵 数 是 美美 的 3 倍 还 多 6 朵 ， 小小 有 多少 朵 红花 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "9618", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 去 时 的 速度 是 每 小时 80 千米 ， 共用 了 6 小时 ． 返回 时 只用 了 4 小时 ， 这辆 汽车 返回 时 的 速度 = ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8619", "content": "某 乡镇企业 ， 去年 上半年 完成 了 全年 产值 计划 的 (7/12) ， 下半年 完成 了 全年 产值 计划 的 (5/8) ， 去年 企业 的 产值 超过 全年 产值 计划 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8993", "content": "六年级 同学 去年 植树 120 棵 ， 今年 比 去年 增加 了 15% ， 今年 植树 多少 棵 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20865", "content": "一 本 字贴 14 元 ， 一套 画片 15 元 ， 小 明 买 了 1 本 字贴 和 2 套 画片 ， 一共 花 了 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15851", "content": "5.12 地震 后 学校 组织 四年级 同学 为 灾区 小朋友 捐款 ． 四年级 共有 4 个 班 ， 平均 每班 48 人 ， 每人 捐款 5 元 ， 四年级 一共 捐款 多少 元 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "14184", "content": "修 一条 公路 ， 已修 的 是 未 修 的 (3/4) ． 已经 修 了 120 米 ， 这 条 路 全长 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18295", "content": "一 种 商品 连续 两次 降价 20% 后 ， 现在 每件 144 元 ， 原价 多少 元 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "18285", "content": "一 本书 有 320 页 ， 小 刚 第一天 看 了 全书 的 19% ， 第 二 天 看 了 全书 的 31% ， 还 剩 多少 页 没有 看 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7491", "content": "从 广丰县 城 到 南昌 的 公路 长 300 千米 ， 一辆 汽车 走 高速公路 的 速度 是 100 千米 / 小时 ， 走 普通 公路 的 速度 是 50 千米 / 小时 ， 从 县城 去 南昌 走 高速路 比 普通 公路 节省 多少 时间 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20081", "content": "甲 数 的 (3/4) 是 36 ， 它 的 (1/3) 比 乙 数 少 25 ， 乙 数 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13294", "content": "5 （ 2 ） 班 有 45 人 ， 许多 人 参加 课外 小组 ， 参加 美术组 的 有 12 人 ， 参加 奥 数组 的 有 30 人 ， 两个 组 都 没 参加 的 有 8 个人 ， 既 参加 美术组 又 参加 奥 数组 的 有 多少 人 ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "19615", "content": "搬运工 接受 搬运 250 个 花瓶 的 任务 ， 运 一个 完整 的 花瓶 到 目的地 可 得 搬运费 20 元 ， 损坏 一个 要 倒赔 100 元 ． 运 完 这 批 花瓶 后 ， 工人 共 得 搬运费 4400 元 ， 那么 搬运工 人 损坏 了 多少 个 花瓶 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "14594", "content": "要 将 浓度 为 40% 的 某种 消毒液 500 克 稀释 成 5% 的 消毒液 ， 需 加水 多少 克 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5302", "content": "某 小区 有 480 户 住户 ， 其中 有 电脑 的 占 (5/8) ． 该 小区 有 电脑 的 住户 有 多少 户 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1003", "content": "一 桶 油 ， 用 去 20% ， 还 剩 32 千克 ， 这 桶 油 原有 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "18262", "content": "1 kg 的 (3/4) 与 多少 kg 的 (1/4) 一样 重 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3826", "content": "浓度 为 16% 的 盐水 800 克 ， 要 加 浓 到 浓度 20% ， 应 加盐 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12163", "content": "有 松树 64 棵 ， 比 柳树 少 16 棵 ， 杨树 的 棵 数 等于 松树 、 柳树 棵 数 和 的 3 倍 ， 公园 里 有 杨树 多少 棵 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "4583", "content": "修 一条 水路 ， 第一周 修 了 全长 的 20% ， 第 二 周 修 了 全长 的 (2/7) ， 两周 共 修 了 170 米 ， 这 条 路 全长 = 多少 米 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10226", "content": "某 数 的 (1/5) 正好 是 3 的 40% ， 求 某 数 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15880", "content": "爸爸 体重 65 千克 ， 小 明 的 体重 是 爸爸 体重 的 (1/5) 多 3 千克 ， 小 明 的 体重 = 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "441", "content": "有 12 个 棋子 ， 拿出 其中 的 (1/2) ， 拿出 了 多少 个 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14555", "content": "多少 个 138 的 和 是 1104 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "558", "content": "两列 火车 在 两组 互相 平行 的 轨道 上 相向 行驶 ． 甲 车长 720 米 ， 速度 是 28 米 / 秒 ； 乙 车长 900 米 ， 速度 是 26 米 / 秒 ． 从 两车 车头 相遇 到 车尾 离开 ， 共 需要 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3075", "content": "学校 有 科技 书 600 本 ， 是 文艺 书 的 5 倍 ， 科技 书 和 文艺 书 共有 多少 本 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1755", "content": "计算 ： 9 * 99 * 999 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "641", "content": "一 条 路 长 80 米 ， 修 完 了 30 米 ， 还 剩 几分 之 几 没 修 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16460", "content": "95 - 38 的 差 乘 9 / 63 的 商 ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22587", "content": "小男孩 喜欢 看 《 格林童话 》 ， 这个 星期 的 前 3 天 看 了 178 页 ， 后 4 天 看 了 余下 的 125 页 ． 这 本书 共有 多少 页 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "11366", "content": "学校 果园 中 有 梨树 9 棵 ， 柿子树 6 棵 ． 桃树 是 梨树 的 3 倍 ， 桃树 有 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "20039", "content": "39 与 25 的 和 乘 6 = ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10070", "content": "同学 们 排队 做操 ， 小 明 后面 有 7 人 ， 前面 有 8 人 ， 这 一队 共有 几 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7914", "content": "被除数 和 商都 是 25 ， 除数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16379", "content": "一 台 电脑桌 打 0.85 后 卖 255 元 ， 比 原价 便宜 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5201", "content": "两条船 同时 从 两地 相向 而 行 ． 快船 每 小时 行 20 千米 ， 慢 船 每 小时 行 18 千米 ， 5 小时 后 相遇 ， 两地 相距 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "10866", "content": "“ 感恩节 ” 酬宾 服装 一律 降价 20% ， 我 有 优惠卡 还 可以 再 打 0.9 ， 妈妈 买 了 一套 衣服 花 了 450 元 钱 ， 这 套 衣服 原价 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5970", "content": "某 水电 运进 苹果 657 千克 ， 卖出 569 千克 后 ， 又 运进 了 300 千克 ， 这 是 水果店 有 苹果 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7317", "content": "振 越 电脑城 运 来 一批 新 电脑 ， 其中 笔记本电脑 有 140 台 ， 占 新 运 来 电脑 总数 的 (7/18) ， 新 运 来 的 电脑 总共 有 多少 台 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3467", "content": "一 辆 汽车 以 不变 的 速度 从 甲地 开往 乙地 ， 前 4 小时 刚好 行 了 全程 的 (2/5) ． 这辆 汽车 从 甲地 行驶 到 乙地 共用 了 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1990", "content": "学校 为 六年级 的 老师 购买 了 一包 办公 用纸 ， 计划 平均 每天 用 42 张 ， 可以 用 25 天 ． 由于 老师 们 节约 ， 实际 用 了 35 天 ， 平均 每天 节约 用纸 多少 张 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2724", "content": "某次 小学 数学 竞赛 ， 共有 20 道 题 ， 评分标准 是 ： 每 做 对 一 题 得 5 分 ， 每 做 错 一 题 或 不 做 都 倒扣 3 分 ． 笑笑 参加 了 这次 竞赛 ， 得 了 68 分 ， 求 她 做 对 了 几道 题 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "5722", "content": "把 (3/4) 升 橙汁 灌 到 能 装 (1/4) 升 的 小瓶 里 ， 可以 灌 多少 瓶 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9894", "content": "小 明 有 35 朵花 ， 小 亮 比 小 明 多 (5/7) ， 小 亮 比 小 明 多 几朵 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13720", "content": "每 百克 玉米 含钙 22 毫克 ， 比 每 百克 小米 的 含钙量 少 (9/20) ． 每 百克 小米 含钙 多少 毫克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11386", "content": "学校 里 月季花 60 棵 ， 菊花 的 棵 数 是 月季 的 (1/2) ， 同时 ， 又 是 芍药 的 (3/4) ， 芍药 有 多少 棵 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20369", "content": "草地 上 有 一群 蝴蝶 ， 白蝴蝶 占 总数 的 (2/7) ， 剩下 的 是 花蝴蝶 ． 花蝴蝶 占 总数 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "2308", "content": "猫 追 老鼠 ， 原来 它们 相距 25 米 ， 猫 跑 了 50 米 后 与 老鼠 相距 5 米 ． 猫 还要 跑 多少 米 就 可以 追 上 老鼠 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10427", "content": "一 个 县 去年 计划 造林 1000 公顷 ， 实际 超过 计划 的 30% ， 实际 造林 多少 公顷 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14300", "content": "王 阿姨 把 5000 元 钱 存入 银行 ， 定期 整存整取 3 年 ． 如果 年利率 按 2.70% 计算 ， 到期 要 交纳 20% 的 利息 所得税 ． 到期 后 ， 她 可 获得 本金 和 税后 利息 共 多少 元 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "18269", "content": "一 个 养 兔 专业户 养 白兔 800 只 ， 黑 兔 比 白兔 少 20% ． 白兔 和 黑 兔 共有 多少 只 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "7032", "content": "学校食堂 运进 350 千克 白菜 ． 第一天 用 去 (1/5) ， 第 二 天 用 去 (1/7) ． 两天 一 共用 去 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4163", "content": "用 1 、 2 、 3 这 3 个 数字 和 小数点 ， 可以 组成 多少 个 不同 的 两位 小数 ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18981", "content": "水果 店里 有 苹果 300 千克 ， 比 运 来 的 雪梨 少 (2/5) ， 运 来 雪梨 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1607", "content": "两个 因数 的 积 为 390 ， 其中 一个 因数 扩大 4 倍 ， 积 为 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14178", "content": "学校 买来 7 套 同样 的 桌椅 ， 其中 桌子 共 花 了 105.7 元 ， 椅子 共 花 了 77.7 元 ． 每张 桌子 比 每 把 椅子 贵 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9739", "content": "修 一条 长 1200 米 的 公路 ， 已经 修 的 与 未 修 的 比 是 3 ： 5 ． 已经 修 了 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15335", "content": "小 敏 看 一本 课外书 ， 已 看 了 全书 的 (1/3) ， 还 剩 112 页 未 看 ． 这 本书 共有 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5428", "content": "妈妈 买 了 4 千克 香蕉 和 3.5 千克 苹果 ， 一共 花 了 51.2 元 ． 已知 香蕉 每千克 7.2 元 ， 苹果 每千克 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5142", "content": "两辆 火车 同时 从 相距 3450 千米 的 a 、 b 两站 相向 开出 ， 15 小时 后 两车 相遇 ． 甲 车 每 小时 行驶 120 千米 ， 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13752", "content": "一 艘 军舰 模型 摆放 在 水池 中 ， 军舰 的 船 沿 高出 水面 80 厘米 ， 现 向 池 中 不断 注水 ， 每 小时 水面 会 上涨 20 厘米 ． 问 几小时 后 这 艘 军舰 会 沉没 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6829", "content": "六年级 某班 有 35 人 ， 男同学 人数 占 全班 人数 的 (4/5) ， 女同学 有 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3926", "content": "粮站 原有 1620 千克 面粉 和 2300 千克 大米 ， 又 运 来 32 袋 面粉 ， 每 袋 25 千克 ， 现在 一共 有 面粉 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "7827", "content": "3 / (2/3) 的 商 减去 1.5 ， 再 乘 (4/15) ， 积 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22609", "content": "一 个数 的 3 倍 加上 这个 数 的 4 倍 ， 和 是 1.68 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22706", "content": "“ 鸟巢 ” 总 用 钢 量 约 为 11 万吨 ， 比 外部 结构 用 钢 量 的 2.5 倍 还 多 0.5 万吨 ． 问 “ 鸟巢 ” 的 外部 结构 大约 用 钢 量 多少 万吨 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11279", "content": "甲 、 乙 两 人 去 商店 ， 他们 看中 了 同 一款 的 小型 计算器 ． 但 甲 带 的 钱 差 30 元 ， 乙 带 的 钱 差 25 元 ， 于是 他们 合 买 了 一台 ， 结果 还 剩下 10 元 ． 这 台 计算器 的 定价 = 多少 元 ．", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "775", "content": "聪聪 读 一本 故事书 ， 第一天 读 了 全书 的 (4/7) ， 第 二 天 又 读 了 余下 的 (3/5) ， 这时 还有 24 页 没 读完 ， 这本 故事书 共有 多少 页 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12669", "content": "幸福 小学 参观 “ 神舟 6 号 ” 飞船 科技成果 展览 ， 三年级 参加 了 45 人 ， 四年级 参加 的 人数 是 三年级 的 3 倍 ， 六年级 参加 的 人数 是 四年级 的 4 倍 ， 六年级 有 多少 人 参加 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "3135", "content": "张 大伯 养 了 76 只 鸭 ， 养鸡 的 只 数 正好 是 鸭 的 2 倍 ， 张 大伯 养鸡 、 鸭 共有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16446", "content": "一 套 房价 为 52 万元 的 房子 ， 按 房价 的 (3/200) 交纳 契税 ， 则 交税 后 实际 应付 多少 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4434", "content": "甲乙 两车 同时 从 a 、 b 两地 相向 而 行 ， 行驶 1.5 小时 后 两车 相距 87 千米 ； 又 行驶 了 0.5 小时 后 两车 相距 38 千米 ， 如果 甲 车 每 小时 行 42 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12774", "content": "排球 个数 比 足球 多 (1/5) ， 足球 比 排球 少 6 个 ， 排球 有 多少 个 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2790", "content": "施工队 要 挖 一条 水渠 ， 已经 挖 了 35.4 米 ， 没 挖 的 比 已 挖 的 多 6.6 米 ， 这 条 水渠 全长 多少 米 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "20900", "content": "甲 、 乙 两辆 汽车 分别 从 相距 800 千米 的 两城 相向 开出 ， 8 小时 相遇 ， 已知 甲 车 每 小时 行驶 45 千米 ， 乙 车 每 小时 行驶 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10697", "content": "193 - 178 的 差 ， 乘 12 + 18 的 和 ， 积 = ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5448", "content": "食堂 有 580 千克 煤 ， 烧 了 6 天 ， 每天 烧煤 36 千克 ， 还 剩 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1043", "content": "一 个 圆锥 的 体积 是 12 立方分米 ， 3 个 和 它 等 底 等 高 的 圆柱 的 体积 = ．", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "880", "content": "一 本书 7 元 ， 四年级 一班 有 47 人 ， 二 班 有 53 人 ， 每人 买 一本 ， 要 多少 元 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "172", "content": "新华 小学 有 学生 825 人 ， 六年级 学生 人数 占 全校学生 总数 的 (2/5) ， 五年级 学生 人数 比 六年级 多 (1/11) ， 五年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "18139", "content": "同学 们 去 公园 划船 ， 三年级 114 人 ； 四年级 132 人 ； 每 船 做 6 人 ， 一共 需要 租 多少 条 船 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15562", "content": "一 所 大学 今年 计划 招收 6500 名 新生 ， 比 去年 扩招 30% ， 这 所 大学 去年 招收新生 多少 名 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17802", "content": "108 * 91 与 68 的 差 ， 积 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "21124", "content": "河边 有 35 棵 杨树 ， 杨树 的 棵 数 是 柳树 的 5 倍 ， 杨 、 柳树 共 多少 棵 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7177", "content": "师傅 每 时 织锦 (1/5) 米 ， 徒弟 8 时 织 的 与 师傅 6 时 织 的 同样 多 ． 徒弟 每 时 织 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21548", "content": "有 甲 、 乙 两杯 水 ， 甲 杯 装 水 0.2 千克 ， 如果 从 乙 杯中 倒 出 (1/3) 给 甲 杯 ， 两杯 水 就 一样 多 ， 乙 杯 原来 装 水 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7346", "content": "某 工厂 原 计划 每天 烧煤 18 吨 ， 存 煤 量 够 烧 48 天 ， 实际 每天 烧 的 吨数 是 原 计划 的 (8/9) ， 实际 可以 烧 多少 天 ．", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "19641", "content": "水果店 一天 上午 卖出 香 焦 25 千克 ， 下午 比 上午 多 卖 (1/5) ， 下午 卖出 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "22901", "content": "工程队 5 天 完成 全部 工程 的 (1/3) ， 完成 全部 工程 需要 多少 天 ．", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21362", "content": "马 小 虎 同学 在 统计 一个 小组 的 一次 考试 的 平均 成绩 时 ， 将 李 明 同学 的 得分 96 误 写作 69 ， 算 出 的 平均分 是 87 分 ， 发现 后 将 平均分 更正 为 90 分 ， 则 这个 小组 有 多少 位 同学 ．", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9195", "content": "王老师 要 批改 84 篇 作文 ． 第一天 批改 了 14 篇 ， 第 二 天 批改 了 16 篇 ． 余下 的 要 3 天 批改 完 ， 平均 每天 批改 多少 篇 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10028", "content": "绿化 队 计划 60 天 种植 1500 棵 树苗 ， 实际 每天 种植 的 棵 数 比 计划 多 5 棵 ． 种植 这 批 树苗 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8443", "content": "今年 植树节 期间 ， 沙坡 镇 中心小学 六年级 学生 共 植树 252 棵 ， 比 五年级 同学 多 植 48 棵 ． 两个 年级 共 植树 多少 棵 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "20592", "content": "(1/2) + (1/4) = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "17784", "content": "二年级 3 班 有 34 人 会 跳绳 ， 有 26 人 会 踢毽子 ， 其中 有 24 人 既 会 跳绳 又 会 踢毽子 ， 还有 2 人 两样 都 不会 ． 你 算算看 ， 全班 有 多少 位 同学 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12396", "content": "36 个 同学 在 操场上 围成 一个 圆圈 做 游戏 ， 每 相邻 两个 同学 之间 都 是 2 米 ， 这个 圆圈 的 周长 = 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "16268", "content": "在 一次 跳高 比赛 中 ， 张 敏 跳 过 了 0.9 米 ， 肖 红 比 张 敏 跳 得 低 0.05 米 ， 李 海 比 肖 红 跳 得 高 0.15 米 ． 李 海 跳 过 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14270", "content": "学校 修 阅览室 ， 计划 投资 60 万元 ． 实际 节约 了 5% 的 费用 ， 修建 阅览室 的 实际 投资 费用 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6820", "content": "李 华 看 一 本书 ， 每天 看 29 页 ， 看 了 30 天 后 还 剩 205 页 ， 这 本书 一共 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13857", "content": "在 口袋 里 放入 除了 颜色 外 完全相同 的 6 个 红球 和 3 个 黄 球 后 ， 现在 从中 摸 出 1 个 球 ， 是 红色 球 的 可能性 = ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7083", "content": "电视机厂 3 月份 实际 生产 电视机 4500 台 ， 比 原 计划 多 生产 (1/8) ． 原 计划 要 生产 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16531", "content": "买 一台 电脑 ， 分期付款 购买 要 加价 6% ， 现金 购买 则 可 按 原价 的 98% 成交 ． 李 叔叔 算了算 ， 发现 分期付款 比 现金 购买 多付 600 元 ． 这 台 电脑 原价 = 多少 元 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22740", "content": "苹果 售价 每千克 3.5 元 ． 妈妈 买 了 3.57 千克 这样 的 苹果 ， 应付 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "1727", "content": "长 150 米 的 火车 以 每秒 18 米 的 速度 穿越 一条 300 米 的 隧道 ． 问 火车 穿越 隧道 （ 进入 隧道 直到 完全 离开 ） 要 多少 时间 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11524", "content": "上个星期 小 英 家用 7650 元 新 买 了 一架 钢琴 ． 妈妈 告诉 别人 说 ： “ 这 架 钢琴 降价 了 10% 后 我 才 买 的 ． ” 你 知道 这 架 钢琴 原来 要 卖 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19351", "content": "一 种 自行车 的 轮胎 外 直径 是 0.8 米 ， 每分钟 转动 60 周 ， 每分钟 能 前进 多少 米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13965", "content": "一 套 西服 原价 250 元 ， 现在 降价 (1/5) ． 现在 买 这 套 西服 要 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15888", "content": "四年级 二 班 共有 学生 50 人 ， 他们 共 做好事 400 件 ． 平均 每人 做好事 多少 件 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4244", "content": "师徒 二 人 要 生产 2100 个 零件 ， 计划 10 天 完成 ， 实际 每天 少 生产 了 35 个 ， 完成 这项 任务 实际 用 了 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22348", "content": "一 根 绳子 截去 20% 后 ， 再 接上 6 米 ， 结果 比 原来 的 绳子 还 长 30% ， 这根 绳子 原来 多少 米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20619", "content": "708 减去 一个 数 是 263 ， 这个 数 = ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "8158", "content": "某 车间 4 月份 生产 机床 2100 台 ， 超过 计划 5% ， 计划 生产 多少 台 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9410", "content": "爸爸 买来 一些 巧克力 ， 张 华 吃 了 (1/5) ， 正 好吃 了 4 块 ． 爸爸 买来 多少 块 巧克力 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19548", "content": "长方形 的 长 是 3 厘米 ， 宽 是 2 厘米 ， 周长 = 多少 厘米 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15885", "content": "买 8 本 笔记本 和 4 枝 圆珠笔 共用 去 26 元 ， 已知 笔记本 的 单价 是 1.8 元 ， 圆珠笔 的 单价 = 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2281", "content": "张 叔叔 给 某个 公司 送 100 个 花瓶 ， 每个 运费 1.5 元 ， 如果 运送 途中 有 损坏 ， 那么 每 损坏 一个 不但 不 给 运费 ， 还要 赔偿 15 元 ． 送 完 货 ， 张 叔叔 得到 运费 84 元 ， 他 损坏 了 几个 花瓶 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "11156", "content": "一 本书 ， 已 读 了 总数 的 (1/3) 还 多 15 页 ， 已 读 的 页数 与 未 读 的 页数 比 是 2 ： 3 ， 全书 共 多少 页 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10546", "content": "修路 队 修 一条 路 ， 5 天 修 了 这 条 路 的 (2/9) ， 照 这样 的 速度 ， 修 完 这 条 路 还 需要 多少 天 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8249", "content": "浮萍 在 池塘 里 所 占 水面 面积 每天 增加 一 倍 ， 经过 62 天 整个 池塘 长满 了 浮萍 ． 浮萍 长 到 半个 池塘 水面 时 ， 用 了 多少 天 时间 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "591", "content": "一 种 医用 酒精 ， 用 纯酒精 和 水 按 3 ： 1 配制 而 成 ， 现有 纯酒精 45 千克 ， 可以 配制 多少 的 这种 医用 酒精 ．", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9250", "content": "多少 除以 30 的 商 是 13 ， 余数 是 14 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14064", "content": "育才 小学 春季 植树 ， 成活 了 150 棵 ， 没有 成活 的 有 12 棵 ， 没有 成活 的 占 植树 总 棵 数 的 几分 之 几 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "2803", "content": "某 数 除以 5 ， 减去 10 ， 再 乘 2 ， 最后 加上 20 ， 结果 等于 40 ， 这个 数 = ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "768", "content": "商店 以 每个 48 元 的 价格 购进 一批 篮球 ， 售价 为 58 元 ， 卖 到 还 剩 10 个 时 ， 除 成本 外 ， 已 获利 540 元 ． 这 批 篮球 一共 多少 个 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "22758", "content": "一 个 玩具厂 做 一个 毛绒 兔 原来 需要 3.8 元 的 材料 ． 后来 改进 了 制作方法 ， 每个 只 需 3.6 元 的 材料 ． 原来 准备 做 180 个 毛绒 兔 的 材料 ， 现在 可以 做 多少 个 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13482", "content": "果园 里 有 桃树 120 棵 ， 苹果树 的 棵 树 相当于 桃树 的 (4/5) ， 梨树 棵 树 比 苹果树 多 (1/8) ． 梨树 棵 树 比 苹果树 多 多少 棵 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13646", "content": "小 明 和 小 刚 从 市场 的 同一 地点 同时 向 相反 的 方向 走 去 ， 小 明 每分钟 走 65 米 ， 小 刚 每分钟 走 55 米 ， 8 分钟 后 两 人 分别 走 到 了 市场 的 两端 ． 市场 全长 有 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16821", "content": "张 先生 以 标价 的 95% 买下 一套 房子 ， 经过 一段时间 后 ， 又 以 超出 原 标价 30% 的 价格 把 房子 卖出 ． 这样 他 一共 获利 10.5 万元 ． 这 套 房子 原 标价 多少 万元 ．", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22131", "content": "笔记本 一本 3 元 ， 买 9 本 需要 花 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "12616", "content": "一 种 水果 每千克 2.8 元 ， 妈妈 带 10 元 钱 买 3 千克 这样 的 水果 ， 应 找回 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6003", "content": "我 借 了 一本 侦探小说 256 页 ， 已经 看 了 164 页 ， 剩下 的 页数 要 在 4 天 内 看 完 ， 平均 每天 看 多少 页 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5440", "content": "压路机 的 后轮 直径 是 1 米 ， 长 1.25 米 ， 如果 后轮 每分钟 可 转动 6 周 ， 每分钟 可 压路 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.2, "length": 7}
-{"question_id": "13953", "content": "甲 、 乙 两车 从 相距 280 千米 的 两地 同时 出发 ， 相向 而 行 ， 经过 4 小时 两车 相遇 ． 甲 车 每 小时 行 30 千米 ， 乙 车 每 小时 行 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14663", "content": "打 一份 稿件 ， 小 王 用 了 (7/10) 小时 ， 比 小 方 多用 了 (1/5) 小时 ． 小 方 用 了 多长时间 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "22564", "content": "1.1 + 2.2 + 3.3 + 4.4 + 5.5 + 6.6 + 7.7 + 8.8 + 9.9 = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "17979", "content": "8 个 鸭蛋 重 (4/5) 千克 ， 一个 鸭蛋 重 多少 千克 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "410", "content": "某班 女生 人数 是 男生 人数 的 (4/5) ， 后来 又 转 进 1 名 女生 ， 这时 女生 是 男生 的 (5/6) ， 现在 班上 有 多少 女生 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "15484", "content": "一 个 修路 队 要 修 一条 长 2100 米 的 公路 ， 前 5 天 平均 每天 修 240 米 ， 余下 的 任务 要 3 天 完成 ， 平均 每天 要 修 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "20536", "content": "学校 有 篮球 60 个 ， 篮球 比 足球 多 (1/4) ， 足球 有 多少 个 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "14573", "content": "张老师 出版 了 一本 《 高年级 数学 解题技巧 》 ， 获得 稿费 4000 元 ． 按规定 ， 超出 800 元 的 部分 应 缴纳 14% 的 个人所得税 ． 张老师 应 缴税 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19134", "content": "小 明 爸爸 用 一根 绳子 拴 摘 回来 的 玉米棒 ， 第一次 用 去 全长 的 一半 还 多 2 米 ， 第 二 次 用 去 余下 的 一半 少 10 米 ， 第 3 次 用 去 15 米 ， 最后 还 剩 9 米 ， 那么 这根 绳子 原来 有 多少 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.4, "length": 11}
-{"question_id": "11919", "content": "一 筐 梨 吃 去 了 (3/5) ， 正好 是 18 千克 ． 求 这 筐 梨 原有 多少 千克 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8671", "content": "某人 在 一年 中 接受 工厂 分配 的 任务 若干次 ， 按规定 如果 及时 完成 任务 就 奖给 他 25 元 ， 如果 没 能 按时 完成 任务 ， 就 被 罚款 50 元 ， 最后 完成 任务 的 次数 是 没有 完成 任务 的 7 倍 ， 该 工人 年终 共 得 款 3750 元 ． 求 他 在 这 一年 中 没 完成 任务 的 次数 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "12791", "content": "一 个 圆 的 周长 是 25.12 厘米 ， 它 的 直径 = 多少 厘米 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "9880", "content": "新时尚 服装店 里 服装 换季 打折 出售 ． 一种 服装 按照 原价 的 0.7 出售 ， 这样 就 比 原价 便宜 了 120 元 ． 这种 服装 原价 = 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15360", "content": "花生仁 的 出油率 是 42% ， 一个 榨油厂 用 2000 千克 的 花生仁 榨油 ， 能 榨出 多少 千克 花生油 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "17228", "content": "欧 欧 、 小 美 、 小泉 3 人 行走 的 速度 分别 是 每分钟 走 60 米 ， 80 米 、 100 米 ． 欧 欧 、 小 美 两 人 在 b 地 ， 小泉 在 a 地 与 欧 欧 、 小 美 两 人 同时 相向 而 行 ． 小泉 与 小 美 相遇 后 ， 又 过 3 分钟 和 欧 欧 相遇 ． 那么 ， a 、 b 两地 相距 多少 米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.6, "length": 15}
-{"question_id": "970", "content": "水果店 卖出 香蕉 和 苹果 各 48 箱 ， 香蕉 每箱 50 千克 ， 苹果 每箱 25 千克 ， 卖出 香蕉 和 苹果 一共 多少 千克 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4323", "content": "化肥厂 今年 7 个 月 完成 全年 生产 任务 的 (3/4) ， 再生产 2000 吨 就 可 超产 200 吨 ， 该厂 全年 生产 化肥 多少 吨 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9402", "content": "一 个 足球 比 一个 排球 贵 23 元 ， 足球 的 单价 是 排球 的 1.2 倍 ． 一个 足球 多少 钱 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8800", "content": "小 明 从 学校 回家 ， 如果 步行 要 20 分钟 ， 如果 骑 自行车 要 8 分钟 ， 已知 他 步行 每分钟 走 60 米 ， 那么 他 骑 自行车 每分钟 多少 米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1259", "content": "小 明 妈妈 月工资 收入 是 2000 元 ， 按 税法 规定 ， 超过 1600 元 的 部分 要 按 5% 的 税率 缴纳 个人所得税 ． 小 红 妈妈 每月 应 缴纳 个人所得税 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15162", "content": "山羊 的 只 数 比 绵羊 的 只 数 少 (1/5) ， 山羊 的 只 数 是 绵羊 只 数 的 多少 ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "14219", "content": "家电 商场 促销 ， 打 0.9 销售 ． 买 一台 原价 6400 元 的 电视机 ， 能 节省 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "14211", "content": "星星 小学 五年级 有 男生 152 人 ， 女生 118 人 ． 六年级 的 学生 人数 是 五年级 的 (7/9) ， 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6707", "content": "一 辆 旅游车 在 平原 和 山区 各行 了 2 小时 ， 在 平原 每 小时 行 60 千米 ， 在 山区 每 小时 行 45 千米 ， 最后 到达 山顶 ， 这 段 路程 有 多长 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "11898", "content": "一 台 彩色 电视机 降价 20% 后 售价 是 880 元 ， 这 台 电视机 降价 了 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "2494", "content": "百货商店 今天 卖出 25 台 电视机 、 7 台 洗衣机 ， 卖出 的 电视机 的 台数 是 洗衣机 的 几分 之 几 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "7679", "content": "正 广 和 饮用水 公司 的 送水工 人 ， 每 上 一层 楼梯 要 50 秒 ， 那么 ， 送水工 人 送 一桶 水 到 5 楼 需要 多少 秒 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18620", "content": "读 一本 450 页 的 书 ， 第一天 读 了 全书 的 (1/3) ， 第 二 天 读 了 全书 的 (2/5) ， 还 剩 多少 页 没 读 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10664", "content": "用 篱笆 围 一块 边长 分别 为 4 米 和 2 米 的 平行四边形 花圃 ， 需要 篱笆 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "21949", "content": "粮店 运 来 花生 和 大豆 各 50 袋 ， 每 袋 大豆 重 115 千克 ， 每 袋 花生 重 98 千克 ， 粮店 运 来 的 大豆 比 花生 多 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "10683", "content": "新华 校办 厂 生产 玩具 ， 张师傅 做 了 135 个 ， 李师傅 比 张师傅 多 做 26 个 ， 王师傅 比 李师傅 少 做 12 个 ， 王师傅 做 玩具 多少 个 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2299", "content": "六年级 一班 帮 木工 爷爷 修理 板凳 ． 上午 修 了 54 条 ， 下午 修 的 比 上午 多 (1/6) ． 下午 修 了 多少 条 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "13442", "content": "比 一个 数 的 (4/5) 少 12 的 数 是 45.6 ， 求 这个 数 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15456", "content": "15.6 / 24 * 0.5 的 积 ， 商 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6475", "content": "一 道 除法 算式 ， 商 和 余数 都 是 3 ， 除数 是 29 ， 被除数 = ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18103", "content": "梨 比 苹果 多 (1/4) ， 刚好 多 32 个 ， 苹果 有 多少 个 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "13316", "content": "实验 小学 买 了 2 只 足球 ， 5 只 篮球 共用 去 287 元 ， 每 只 足球 49 元 ， 每 只 篮球 多少 元 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4869", "content": "一 套 家 真 现价 51000 元 ， 比 原价 降低 了 15% ， 这 套 家具 现价 比 原价 降低 了 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17962", "content": "一 袋 大米 50 千克 ， 吃 了 12.5 千克 ． 吃 了 的 是 剩下 的 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13613", "content": "小 明 有 故事书 30 本 ， 比 小 红 的 故事书 多 (1/5) ， 比 小 红 多 多少 本 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22314", "content": "养鸡场 有 公鸡 120 只 ， 小鸡 比 公鸡 多 40 只 ， 母鸡 的 只 数 是 小鸡 的 3 倍 ， 母鸡 有 多少 只 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4591", "content": "一 根 长方体 木料 ， 长 5 m ， 横截面 的 面积 是 0.08 dm ^ 2 ． 如果 把 这根 木料 截 成 两段 ， 表面积 就 增加 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "6165", "content": "某 粮店 运进 面粉 3.3 吨 ， 面粉 比 大米 多 0.7 吨 ， 问 粮店 运进 面粉 和 大米 一共 多少 吨 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6552", "content": "修路 队 要 修 一条 路 ， 已经 修 了 1200 米 ， 剩下 要 在 6 天 内 修 完 ， 平均 每天 修 250 米 ， 这 条 公路 全长 多少 米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2325", "content": "妈妈 买 火腿 用 去 38.4 元 ， 买 巧克力 用 去 24.8 元 ， 最后 还 剩 25.3 元 ， 妈妈 一共 带 了 多少 钱 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "4596", "content": "从 369 里 减去 45 的 4 倍 ， 得到 的 差 再 被 3 除 ， 商 = ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18942", "content": "工程队 修铁路 ， 第一次 修 了 要 修 部分 的 (1/9) ， 第 二 次 修 了 要 修 部分 的 (2/9) ， 两次 共 修 了 要 修 部分 的 几分 之 几 ？", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13663", "content": "学校 有 8 名 教师 进行 象棋 比赛 ， 如果 每 2 名 教师 之间 都 进行 一场 比赛 ， 一共 要 比赛 多少 场 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "17725", "content": "(3/5) 与 (4/7) 的 和 减去 它们 的 差 ， 结果 = ？", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "12464", "content": "一 桶 油 ， 用 去 它 的 (3/5) ， 剩下 10 千克 ， 这 桶 油 原 重 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6279", "content": "敬老院 里 有 8 位 老奶奶 ， 平均年龄 80.5 岁 ； 有 12 位 老爷爷 ， 平均年龄 75 岁 ． 全院 老人 的 平均年龄 = 多少岁 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12491", "content": "20 米 - (1/4) 米 后 = ．", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "6764", "content": "3 千克 鸡蛋 6 元 钱 ， 1 千克 鸡蛋 要 多少 元 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "6296", "content": "用 一个 杯子 向 空瓶 里 倒水 ， 如果 倒 进 3 杯水 ， 那么 连 瓶 共 重 400 克 ； 如果 倒 进 5 杯水 ， 那么 连 瓶 共 重 500 克 ． 这个 空瓶 重 多少 克 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12947", "content": "101 路 公交车 到 炎黄 广场 时 ， 有 (2/5) 的 乘客 下车 ， 又 有 14 人 上车 ， 这时 车上 的 乘客 比 原来 多 30% ． 原来 车上 有 乘客 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7381", "content": "面粉 加工厂 上午 加工 面粉 2300 千克 ， 下午 加工 面粉 1900 千克 ， 每 25 千克 面粉 装 一袋 ， 上午 比 下午 多 加工 多少 袋 面粉 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "7866", "content": "某 食堂 买来 一批 米 ， 吃 去 158 千克 ， 剩下 的 比 吃 去 的 4 倍 少 32 千克 ， 食堂 买来 多少 千克 米 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "13755", "content": "苹果 的 重量 是 800 千克 ， 苹果 与 梨 的 重量 比 是 4 ： 3 ． 共 运进 水果 多少 千克 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11461", "content": "一 袋 大米 吃 了 (5/8) ， 还 剩 45 千克 ． 这 袋 大米 重 多少 千克 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "5453", "content": "总务处 的 王老师 买来 白粉笔 112 盒 ， 红 粉笔 89 盒 ， 买来 的 黄 粉笔 比 白粉笔 和 红 粉笔 的 总数 少 121 盒 ． 黄 粉笔 买 了 多少 盒 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "1404", "content": "食堂 有 煤 5 吨 ， 平均 每天 烧 (1/5) 吨 ， 可以 烧 多少 天 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "17630", "content": "清河 村 有 棉田 21 公顷 ， 占 全村 耕地面积 的 (3/7) ． 全村 耕地面积 = 多少 公顷 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "8099", "content": "一 座 大桥 长 396 米 ， 一列 长 72 米 得 火车 以 每秒 18 米 得 速度 通过 这 座 大桥 ， 从 车 头上 桥 到 车尾 离开 桥 一共 需要 多少 秒 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "353", "content": "6 （ 1 ） 班 有 男生 36 人 ， 是 全班 人数 的 (4/7) ． 女生 有 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17389", "content": "一 辆 洒水车 每 分 行驶 60 米 ， 洒水 的 宽度 是 6 米 ． 洒水车 直行 10 分钟 ， 被 洒水 的 地面 = 多少 平方米 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13742", "content": "五年级 某班 的 一次 身高 调查 中 ， 男生 28 人 平均 身高 1.42 米 ， 女生 22 人 ， 平均 身高 1.45 米 ， 这个 班 同学 的 平均 身高 = 多少 米 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "15124", "content": "学校 修建 围墙 ， 第一天 运 来 砖 4560 块 ， 比 第 二 天 多 运 960 块 ． 两天 共运 来 砖 多少 块 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5168", "content": "一 个数 的 (1/6) 是 8 的 (3/4) ， 这个 数 = ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4954", "content": "15 / (3/20) 的 商 ， 加上 2 - (3/4) 的 差 ， 和 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "21133", "content": "a 比 b 少 (1/4) ， 则 b 比 a 多 多少 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "9718", "content": "（ 2 * 3 * 5 * 7 * 11 * 13 * 17 * 19 ） / （ 38 * 51 * 30 * 31 ） = ．", "knowledge": ["*", "/"], "difficulty": 1.0, "length": 23}
-{"question_id": "17724", "content": "班队 课 上 同学 们 进行 吹 气球 比赛 ， 王 刚 3 分钟 吹 了 12 个 气球 ． 照 这样 计算 ， 他 再 吹 2 分钟 ， 一共 可 吹 几个 气球 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "4654", "content": "两个 因数 的 积 是 3500 ， 其中 一个 因数 是 50 ， 另 一个 因数 = ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "4777", "content": "5 个 同学 参加 数学 竞赛 ， 其中 4 人 的 平均 成绩 是 79 分 ， 加上 张 华 的 分数 后 ， 平均 成绩 是 81 分 ． 张 华 数学 竞赛 得 了 多少 分 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "17289", "content": "21 / 60 = 多少 （ 用 百分数 表示 ） ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "19348", "content": "12345 + 23451 + 34512 + 45123 + 51234 = ．", "knowledge": ["+"], "difficulty": 0.3, "length": 9}
-{"question_id": "15798", "content": "学校 组织 去 航空 博物馆 参观 ， 中年级 男生 去 了 149 人 ， 女生 去 了 132 人 ， 高年级 去 的 人数 是 中年级 的 3 倍 ， 高年级 大约 去 了 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "18549", "content": "粮店 某 天 卖出 大米 (3/5) 吨 ， 比 卖出 的 面粉 多 (1/8) 吨 ． 卖出 面粉 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "1862", "content": "360 - 25 * 4 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "15129", "content": "78 * 6.4 + 2.4 的 30% ， 和 = ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "6854", "content": "一 间 教室 长 8.5 米 ， 宽 5.5 米 ， 用 每块 面积 为 0.25 平方米 的 方砖 铺 地 ， 需要 方砖 多少 块 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "21534", "content": "五年级 有 学生 120 人 ， 六年级 的 学生 人数 比 五年级 多 (1/4) ． 六年级 有 学生 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2085", "content": "食品店 原来 有 400 千克 瓜子 ， 卖出 310 千克 ， 又 运 进来 3 袋 ， 每 袋 80 千克 ， 这个 商店 现有 瓜子 多少 千克 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "5051", "content": "白 冰 和 林木 两家 相距 1800 米 ． 他俩 同时 从 家 出发 ， 相对 而 行 ． 白 冰 骑 自行车 ． 每分钟 行驶 235 米 ， 林木 步行 ， 每分钟 走 65 米 ， 经过 多长时间 两 人 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "6768", "content": "弟弟 以 每 小时 6 千米 的 速度 从 家里 出发 步行 去 公园 ， 2 小时 后 ， 哥哥 离开 家 以 每 小时 18 千米 的 速度 骑车去 追赶 弟弟 ． 问 多少 小时 后 能 追 上 弟弟 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3236", "content": "一 个 工程 小组 计划 修 公路 48 千米 ， 实际 修 的 比 原 计划 多 (7/8) ， 实际 比 原 计划 多 修 几千米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "4288", "content": "业务员 小 李 要 到 6 楼 联系 工作 ， 他 从 1 楼 到 4 楼 用 了 54 秒 ， 照 这样 计算 ， 小 李 走 到 6 楼 还 需要 多少 秒 ．", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "21408", "content": "减数 是 差 的 (4/7) ， 则 被减数 是 减数 的 多少 ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "18277", "content": "纺织厂 每 台 织布机 每 小时 织布 (21/5) 米 ， 3 台 织布机 要 织布 84 米 ， 需要 多少 小时 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3939", "content": "学校 买 回 故事书 320 本 ， 买 回 的 科技 书 比 故事书 的 6 倍 还 多 24 本 ， 学校 买 回 科技 书 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6620", "content": "建筑工地 运到 一批 水管 ， 管理员 把 这 批 水管 按 每堆 21 根 堆成 3 堆 后 ， 还 剩 7 根 ． 问 这 批 水管 有 多少 根 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17984", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 25% ， 第 二 小时 行 了 余下 的 (10/27) ， 这时 离 乙地 还有 102 千米 ． 甲 、 乙 两地 之间 的 路程 = 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "20279", "content": "小 明 有 108 本书 ， 小 红 有 80 本书 ， 小 华 的 书 比 他们 俩 的 总 本 数多 50% ， 小 华 有 多少 本书 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "1037", "content": "一 批 服装 ， 一 车间 的 工人 每天 加工 108 件 ， 5 天 后 还 差 289 件 就 完成 任务 ． 这 批 服装 一共 有 多少 件 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16748", "content": "一 列 火车 从 甲 站 开往 乙 站 ， 已经 行 了 全程 的 (9/20) ， 剩下 的 路程 比 已 行 路程 的 (2/3) 还 多 60 千米 ， 那么 甲乙 两站 相距 多少 千米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "5804", "content": "学校 计划 十 月份 用 煤 (4/5) 吨 ， 实际 比 计划 节约 了 (1/8) 吨 ． 实际 用 煤 多少 吨 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7632", "content": "一 个数 比 38 的 5 倍 少 9 ， 这个 数 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3251", "content": "从 4.6 里 减去 0.4 * 2 的 积 ， 差 = ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4644", "content": "小张 在 地铁站 乘 自动扶梯 下楼 ， 如果 他 向下 走 14 级 时 ， 那么 需 30 秒 可 由 自动扶梯 顶端 到达 底部 ； 如果 他 向下 走 28 级 时 ， 那么 需 18 秒 可 由 自动扶梯 顶端 到达 底部 ， 则 这部 自动扶梯 共有 多少级 ．", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "22516", "content": "630 与 720 的 和 ， 除以 92 与 17 的 差 ， 商 = ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18791", "content": "一 辆 载满 乘客 的 客车 从 甲 市 开出 ， 途经 新农 站 时 ， 有 (1/3) 的 乘客 下车 ， 同时 又 上来 5 名 乘客 ， 这时 车上 乘客 是 原来 的 75% ． 车上 原有 乘客 多少 人 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "13629", "content": "两个 数 的 积 是 一个 乘数 的 72 倍 ， 是 另 一个 乘数 的 59 倍 ， 这 两个 乘数 的 积 = ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "8851", "content": "小 红 买 单价 是 7.5 元 的 钢笔 ， 付 了 40 元 钱 ， 找回 2.5 元 ， 她 买 了 几枝 钢笔 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19597", "content": "实验 小学 ， 今年 有 插班生 125 人 ， 比 去年 多招 了 (1/4) ， 去年 有 插班生 多少 人 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15635", "content": "3 只 母鸡 2 天 产 了 5 个 鸡蛋 ， 那么 6 只 母鸡 12 天 能 产 多少 个 蛋 ．", "knowledge": ["*", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "10338", "content": "小 红 看 一本 160 页 的 故事书 ， 第一天 看 了 全书 的 (2/5) ， 第 二 天 看 了 全书 的 25% ， 两天 共 看 了 多少 页 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "20780", "content": "学校 买来 4 盒 乒乓球 ， 每盒 18 个 ， 买来 的 羽毛球 数 正好 是 乒乓球 的 6 倍 ， 买来 羽毛球 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "11795", "content": "李 阿姨 看中 了 一套 套装 原价 1200 元 ， 现 商场 0.8 酬宾 ， 李 阿姨 凭 贵宾卡 在 打折 的 基础 上 又 享受 5% 的 优惠 ， 她 买 这 套 套装 实际 付 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "11627", "content": "一 套 家具 标价 6500 元 ， 砍价 后 ， 老板 愿 0.8 出售 ． 买 这 套 家具 便宜 了 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2692", "content": "一 辆 电车 从 起点 到 终点 一共 要 行 36 千米 ， 如果 每隔 3 千米 停靠站 一次 ， 那么 从 起点 到 终点 ， 一共 要 停靠 多少 次 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "3228", "content": "有 两堆 煤 ， 甲 堆 重 127 千克 ， 从 甲 堆 运走 12 千克 后 ， 甲 堆 比 乙 堆 的 3 倍 还 多 1 千克 ， 乙 堆 有 煤 多少 千克 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8159", "content": "小 马虎 在 计算 一道 除法 算式 时 ， 把 除数 24 抄 成 了 42 ， 结果 得到 商 7 余 18 ． 正确 的 商 = ？", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "5829", "content": "多少 吨 的 40% 是 24 吨 的 (2/3) ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13579", "content": "计算 ： 24 + 63 + 52 + 17 + 49 + 81 + 74 + 38 + 95 = ．", "knowledge": ["+"], "difficulty": 0.7, "length": 17}
-{"question_id": "1276", "content": "参加 学校 田径比赛 的 女选手 有 50 人 ， 男 选手 人数 比 女选手 多 80% ． 男 选手 有 多少 人 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "16945", "content": "蔬菜 批发点 一天 卖出 西红柿 85 千克 ， 卖出 的 土豆 比 西红柿 的 12 倍 少 28 千克 ． 卖出 土豆 多少 千克 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19234", "content": "工人 王师傅 加工 一批 零件 ， 原 计划 每天 加工 360 个 ， 15 天 完成 ， 实际 完成 加工 任务 的 天数 是 原 计划 的 (2/3) ， 实际 每天 加工 零件 多少 个 ？", "knowledge": ["*", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "18352", "content": "光明 小区 新建 了 18 栋 楼房 ， 每栋 有 8 层 ， 每层 有 6 户 ， 这个 小区 可 容纳 多少 户 人家 ？ ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "20090", "content": "学校 买来 6 箱 学 具 ， 每箱 36 盒 ． 把 这些 学 具 平均 分给 4 个 班 ， 每班 分 到 多少 盒 学 具 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "17908", "content": "今年 5 一 李 明 一家 3 口 由 济南 出发 去 看望 祖母 ， 客车 每 小时 行 64 千米 ， 12 小时 到达 ， 返回 时 乘火车 6 小时 到 济南 ， 若 乘坐 汽车 与 火车 行驶 的 距离 相同 ， 那么 火车 每 小时 行 多少 千米 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "11881", "content": "甲 每 小时 加工 48 个 零件 ， 乙 每 小时 加工 36 个 零件 ， 两 人 共同 工作 8 小时 后 ， 检验 出 64 个 废品 ． 两 人 平均 每 小时 共 加工 多少 个 合格 的 零件 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "15739", "content": "有 一堆 橡皮 ， 其中 4 块 是 红色 的 ， 占 整体 的 (4/11) ， 若 再 增加 1 块 红色 的 橡皮 ， 则 红色 橡皮 占 整体 的 多少 ．", "knowledge": ["+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20523", "content": "某 船 在 静 水中 的 速度 是 每 小时 18 千米 ， 水速 是 每 小时 2 千米 ， 这 船 从 甲地 到 乙地 逆水 行驶 需 15 小时 ， 则 甲 、 乙 两地 相距 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "7092", "content": "王 叔叔 本月 领取 工资 1800 元 ， 按 税法 规定 ， 超过 1600 元 的 部分 ， 按 5% 的 税率 纳税 ， 王 叔叔 实 得 工资 多少 元 ．", "knowledge": ["*", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "23110", "content": "工程队 保修 一段 高速公路 ， 平均 每月 修 16.5 千米 ， 修 了 18 个 月 后 ， 离 中 点 还有 18.5 千米 ， 这 段 高速公路 全长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "15954", "content": "玩具厂 去年 出口创汇 850 万美元 ， 相当于 前年 创汇 的 (5/4) ， 前年 创汇 多少 万美元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "16972", "content": "淮安 动物园 今天上午 接待 了 5 批 游客 ， 平均 每批 130 名 ． 下午 又 来 了 804 名 ， 上午 比 下午 少 了 多少 名 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "9043", "content": "商场 里 一件 大衣 原价 1200 元 ， 购买 时 打 0.8 后 ， 还 可以 再 让利 200 元 ， 购买 这件 大衣 实际 只 需 多少 元 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16333", "content": "甲 、 乙 两地 相距 1500 千米 ， 飞机 从 甲地 到 乙地 是 顺风 需要 2 小时 ． 从 乙地 返回 甲地 需要 2.5 小时 ， 则 飞机 来回 的 平均速度 = ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9075", "content": "李师傅 计划 7 天 完成 一批 零件 ， 每天 生产 50 个 ， 实际 每天 多 生产 40% ， 实际 用 多少 天 完成 任务 ？", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "20122", "content": "图画书 每套 25 元 ， 故事书 每套 126 元 ， 学校 两种 书 各 买 12 套 ， 一共 要 花 多少 钱 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "17800", "content": "一 个数 的 (3/4) 比 30 的 25% 多 1.5 ， 求 这个 数 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10461", "content": "小 芳 的 身高 比 小 明 的 (4/5) 少 3 cm ， 小 芳 身高 117 cm ， 小 明 身高 多少 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "22445", "content": "小胖 带 了 50 元 钱 去 联华 超市 ， 买 学习用品 用 去 了 19.37 元 ， 零食 用 去 了 15.63 元 ， 还 剩下 多少 元 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "4103", "content": "以 4 dm 长 的 线段 为 公共 边 ， 在 两侧 分别 画 出 高 是 6 dm 和 8 dm 的 两个 三角形 ， 这个 组合 图形 的 面积 = 多少 dm ^ 2 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "17112", "content": "某校 有 女 教师 72 人 ， 男 教师 比 女 教师 人数 的 (2/3) 少 5 人 ． 全校 有 教师 多少 人 ？", "knowledge": ["*", "+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "18493", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 第一 小时 行 了 全程 的 (1/7) ， 第 二 小时 比 第一 小时 多行 了 16 千米 ， 这时 距 乙地 还有 94 千米 ， 甲乙 两地 的 公路 长 多少 千米 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9235", "content": "一 件 商品 降价 10% 后 ， 又 加价 4 元 后 的 售价 是 58 元 ， 这件 商品 原价 多少 元 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "3245", "content": "某 筑路工程 队 ， 在 7 月份 前 12 天 完成 了 3.5 千米 的 筑路 任务 ； 为了 早日 完成 任务 ， 在 余下 的 19 天 里 要 修筑 已 完成 任务 的 3 倍 还要 多 0.2 千米 ． 这个 筑路 队 共 要 完成 多少 千米 的 筑路 任务 ？", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "15568", "content": "一 辆车 (1/3) 小时 行驶 12 千米 ， 2 小时 共 行驶 多少 千米 ．", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "20319", "content": "运 一堆 煤 ， 平均 每 小时 运 这 堆 煤 的 (1/18) ， 运 完 这 堆 煤 要 多少 小时 ．", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "11994", "content": "一 袋 糖果 有 (3/4) 千克 ， 20 袋 这种 糖果 装 成 一箱 ， 一辆 小 货车 一次 能 装 60 箱 ， 小 货车 一次 能 装 糖果 多少 千克 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "13046", "content": "学校 举行 跳高 比赛 ， 张 英 跳 过 了 1.1 m ， 李强 比 张 英 跳 得 高 0.15 m ， 李强 比 肖 红 跳 得 高 0.09 m ， 肖 红 跳 过 了 多少 米 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "3383", "content": "计税 金额 是 200000 元 ． 税率 是 15% ， 应 交纳 税额 = 多少 元 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "15746", "content": "有 100 棵 白菜 ， 吃 了 (2/5) ， 剩 了 多少 棵 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17921", "content": "一 辆 面包车 和 一辆 小 货车 同时 分别 从 甲乙 两地 同 向 出发 ， 小 货车 在 前 ， 每 小时 行 30 千米 ， 面包车 在 后 ， 每 小时 行 70 千米 ． 经过 3 小时 面包车 追 上 小 货车 ， 甲乙 两地 路程 = 多少 千米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "11768", "content": "一 段 绳子 ， 剪下 (2/3) 后 ， 长 26 米 ， 这 段 绳子 全长 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "19930", "content": "学校 图书室 有 文艺 书 1500 本 ， 科技 书 比 文艺 书 多 (1/5) ， 科技 书 有 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3713", "content": "畜牧场 去年 养牛 比 今年 少 20% ， 今年 养牛 120 头 ， 去年 养牛 多少 头 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "6843", "content": "3 （ 1 ） 班 4 个 小组 的 同学 收集 旧 罐子 ， 每个 小组 有 12 人 ， 平均 每人 收集 8 个 ． 一共 收集 了 多少 个 ？", "knowledge": ["*"], "difficulty": 0.1, "length": 5}
-{"question_id": "18491", "content": "买 (9/2) 千克 的 苹果 用 去 18 元 钱 ． 平均 每千克 苹果 多少 元 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "23144", "content": "王 叔叔 从 甲 城 到 乙 城 ， 第一天 行 了 全程 的 40% ， 第 二 天 行 了 全程 的 (9/20) ， 距 乙 城 还有 90 千米 ． 甲 、 乙 两城 相距 多少 千米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "11956", "content": "在 学校 组织 的 捐书 活动 中 ， 低年级 同学 捐 了 206 本 ， 高年级 同学 捐 的 本 数 比 低年级 的 4 倍 多 88 本 ， 高年级 同学 捐 了 多少 本 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "2905", "content": "金 岗 小学 举行 班 运动会 ， 每人 只 参加 一 项 ， 五年级 同学 参加 径赛 的 占 全年 级 的 (2/5) ， 参加 田赛 的 占 全年 级 的 (9/20) ， 其余 的 参加 团体操 表演 ． 参加 团体操 表演 的 占 全年 级 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "19659", "content": "一 块 菜地 10 公顷 ， 它 的 (2/9) 种 大蒜 ， 它 的 (4/9) 种 菠菜 ， 其余 的 种 萝卜 ， 种 萝卜 的 占 这块 地 的 几分 之 几 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "17721", "content": "新城 小学 合唱组 有 120 人 ， 美术组 的 人数 是 合唱组 的 (3/4) ， 美术组 的 人数 是 科技 组 的 (2/3) ， 科技 组 有 多少 人 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8068", "content": "王师傅 用 钢管 做 一个 防盗窗 ， 如果 每 锯 一次 钢管 的 损耗 是 2 毫米 ， 把 一根 长 12 米 的 钢管 锯 成 6 段 ， 锯 完 后 这根 钢管 共 损耗 多少 毫米 ．", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "5328", "content": "专卖店 运 来 一批 毛绒玩具 ， 上午 卖出 其中 的 15% ， 下午 卖出 27% ， 已知 这天 共 卖 840 元 ， 这 批 毛绒玩具 共 值 多少 元 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "3792", "content": "一 个 工地 ， 第一天 运进 32.5 吨 石子 ， 比 第 二 天 的 4 倍 多 0.5 吨 ， 两天 共 运进 石子 多少 吨 ？", "knowledge": ["+", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "9966", "content": "修 一条 长 1920 米 的 公路 ， 甲队 每天 修 96 米 ， 这 条 路 如果 由 乙 队 修 可以 提前 4 天 完成 ， 乙 队 每天 修 多少 米 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "6518", "content": "□ / △ = 4 … 5 ， △ 最小 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "13419", "content": "小 华 的 妈妈 带 50 元 钱 去 买菜 ， 买 荤菜 用 去 25.35 元 ， 买 素菜 用 8.15 元 ． 还 剩 多少 元 钱 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "8930", "content": "甲乙 两车 同时 从 a 、 b 两地 相向 而 行 ， 4 小时 后 向 遇 ． 相遇 后 ， 甲 车 继续 行驶 3 小时 到 b 地 ， 乙 车 每 小时 行驶 24 千米 ， 求 ab 两地 之间 的 距离 = 多少 千米 ．", "knowledge": ["*", "+", "/"], "difficulty": 0.3, "length": 9}
-{"question_id": "9663", "content": "运动场 跑道 一圈 是 400 米 ． 小 明 坚持 每天 跑 3 圈 ， 他 每天 跑 多少 米 ？", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "14972", "content": "一 个 西瓜 ， 明明 吃 了 (1/8) ， 妈妈 吃 了 (3/8) ， 还 剩下 这个 西瓜 的 几分 之 几 ？", "knowledge": ["-"], "difficulty": 0.1, "length": 5}
-{"question_id": "16554", "content": "把 10000 元 存 定期 一年 ， 年利率 为 2.25% ， 到期 时 本息 和 = 多少 元 ． （ 不 考虑 利息税 ）", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "16914", "content": "小强 买 了 4 支 钢笔 ， 小林 买 了 3 条 同样 的 钢笔 ， 一 共用 去 了 14 元 钱 ， 一支 钢笔 用 多少 元 ．", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "1459", "content": "小 军 有 42 张 画片 ， 他 将 总数 的 (1/3) 还 多 6 张 送给 小 明 ． 送给 小 明 多少 张 ．", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "3165", "content": "小 马虎 在 计算 一道 减法 题 时 ， 不 小心 把 被减数 500 写成 了 560 ， 减数 没有 写错 ， 小 马虎 算 得 的 答案 和 正确 答案 相差 多少 ？", "knowledge": ["-"], "difficulty": 0.0, "length": 3}
-{"question_id": "7567", "content": "3.2 + 1.68 = ．", "knowledge": ["+"], "difficulty": 0.0, "length": 3}
-{"question_id": "8567", "content": "2008 年 奥运会 我国 的 足球队 共有 8 个 组 ， 每组 有 4 个 队 ， 一共 有 736 名 运动员 参加 比赛 ． 每个 队 有 多少 名 运动员 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "13057", "content": "科技园 星期一 有 游客 1262 人 ． 星期 二 上午 有 游客 738 人 ， 下午 有 游客 525 人 ． 这 两天 一共 有 游客 多少 人 ？", "knowledge": ["+"], "difficulty": 0.1, "length": 5}
-{"question_id": "6292", "content": "轮船 从 甲 港 开往 乙 港 共 行 3 天 ， 第一天 行 了 全程 的 (2/5) ， 第 二 天 行 了 全程 的 (1/3) ， 第 3 天 行 了 280 km ， 甲 港 到 乙 港 的 航程 有 多少 km ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "10957", "content": "某 工厂 有 男 职工 145 人 ， 女职工 的 人数 比 男 职工 的 4 倍 少 30 人 ， 有 女职工 多少 人 ？", "knowledge": ["*", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "2463", "content": "某 超市 原 计划 运进 食用油 480 箱 ， 实际 多 运 了 24 箱 ， 实际 多 运 了 百分之几 ？", "knowledge": ["/"], "difficulty": 0.0, "length": 3}
-{"question_id": "18011", "content": "一 辆 汽车 从 甲地 开往 乙地 ， 出发 2 小时 后 离 乙地 还有 865 千米 ， 出发 5 小时 后 离 目的地 还有 55 千米 ． 甲乙 两地 的 距离 = 多少 千米 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "12477", "content": "一 件 商品 打 0.85 后 比 原价 便宜 15 元 ， 原价 = 多少 元 ．", "knowledge": ["-", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "16929", "content": "工程队 挖 一条 水渠 ， 计划 每天 挖 100 米 ， 24 天 完成 ， 实际 提前 4 天 完成 ， 实际 平均 每天 挖 多少 米 ？", "knowledge": ["*", "-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "22448", "content": "服装 商场 以 65 元 一套 的 价格 购进 一批 服装 ， 然后 以 110 元 一套 的 价格 出售 ， 当 卖出 这 批 服装 的 (5/7) 时 ， 商场 获利 1575 元 ， 问 商场 共 购进 该种 服装 多少 套 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1803", "content": "学校 买来 7 箱 图书 ， 每箱 54 本 ， 平均 分给 6 个 年级 ． 每个 年级 分 得 多少 本 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4140", "content": "张 其 家中 了 128 棵 蓖麻 ， 还 种 了 2 行 向日葵 ， 每行 4 棵 ． 蓖麻 的 棵 数 是 向日葵 的 多少倍 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "703", "content": "计算 ： 74 * 11 + 26 * 12 = ．", "knowledge": ["*", "+"], "difficulty": 0.2, "length": 7}
-{"question_id": "666", "content": "某 年级 有 320 人 ， 其中 参加 篮球比赛 的 有 92 人 ， 参加 乒乓球 比赛 的 有 145 人 ， 既 参加 篮球比赛 又 参加 乒乓球 比赛 的 有 37 人 ， 那么 ， 有 多少 人 没有 参加 这两项 比赛 ．", "knowledge": ["+", "-"], "difficulty": 0.2, "length": 7}
-{"question_id": "6176", "content": "食堂 第一次 运进 大米 550 千克 ， 比 第 二 次 多 50 千克 ， 两次 一共 买进 大米 多少 千克 ？", "knowledge": ["+", "-"], "difficulty": 0.1, "length": 5}
-{"question_id": "18865", "content": "甲乙 两地 相距 560 千米 ， 一辆 货车 以 60 千米 / 每 小时 的 速度 从 甲地 开往 乙地 ， 一辆 客车 同时 从 乙地 相对 开出 ， 每 小时 行 80 千米 ， 经过 几小时 两车 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "15055", "content": "玩具厂 原 计划 5 天 生产 玩具 1820 个 ， 实际 每天 比 原 计划 多 生产 91 个 ． 实际 用 了 多少 天 ？", "knowledge": ["+", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "8484", "content": "一 个 环形 操场 的 周长 是 500 米 ， 甲 、 乙 两名 学生 相 背 而 行 ． 甲 每分钟 走 56 米 ， 乙 每分钟 走 69 米 ． 经过 几分钟 才能 相遇 ？", "knowledge": ["+", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "4043", "content": "某 学校 用 长 9 米 ， 宽 6 米 的 长方形 红布 ， 裁剪 成 面积 0.3 平方米 的 直角三角形 小旗 ， 可以 裁 多少 面 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
-{"question_id": "10734", "content": "一 段 钢材 长 (7/8) 米 ， 做 4 个 零件 用 去 了 (1/2) 米 ， 剩下 的 钢材 还 可以 做 多少 个 这样 的 零件 ？", "knowledge": ["-", "/"], "difficulty": 0.2, "length": 7}
-{"question_id": "1089", "content": "春晖 小学 的 老师 们 带领 学生 外出 春游 ， 参加 春游 的 老师 占 15% ， 其余 的 是 学生 ． 在 学生 中 男 、 女生 人数 的 比 是 9 ： 8 ， 女生 有 160 人 ． 那么 ， 外出 春游 的 师生 一共 有 多少 人 ？", "knowledge": ["*", "+", "-", "/"], "difficulty": 0.4, "length": 11}
-{"question_id": "9264", "content": "一 段 公路 每天 修 全长 的 (1/12) ， 4 天 修 全长 的 多少 ．", "knowledge": ["*"], "difficulty": 0.0, "length": 3}
-{"question_id": "13832", "content": "两列 火车 同时 从 重庆 和 成都 出发 ， 相向 而 行 ， 甲 火车 的 速度 是 62 km / 时 ， 乙 火车 的 速度 是 108 km / 时 ， 经过 2 时 相遇 ． 重庆 到 成都 的 铁路 长 多少 千米 ？", "knowledge": ["*", "+"], "difficulty": 0.1, "length": 5}
-{"question_id": "14964", "content": "工厂 租用 10 辆 汽车 运 480 吨 货 ， 每辆 汽车 都 运 了 12 次 ． 平均 每辆车 每次 运货 多少 吨 ？", "knowledge": ["/"], "difficulty": 0.1, "length": 5}
-{"question_id": "8971", "content": "买 7 双 鞋 的 钱 可以 买 5 件 大衣 ， 每件 大衣 140 元 ， 每 双 鞋子 多少 钱 ？", "knowledge": ["*", "/"], "difficulty": 0.1, "length": 5}
diff --git a/static/test_data/quesnet_data.json b/static/test_data/standard_luna_data.json
similarity index 88%
rename from static/test_data/quesnet_data.json
rename to static/test_data/standard_luna_data.json
index b1faa29d..9b8e3906 100644
--- a/static/test_data/quesnet_data.json
+++ b/static/test_data/standard_luna_data.json
@@ -1,25 +1,25 @@
-{"ques_content": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$", "ques_subject": 1, "ques_id": "726cdbec-33a9-11ec-909c-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["\\\\{-4,1\\\\}", "\\\\{1,5\\\\}", "\\\\{3,5\\\\}", "\\\\{1,3\\\\}"], "ques_answer": "D", "know_list": [0, 10, 57], "know_name": ["代数", "集合", "集合的相等"], "difficulty": 0.424379, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "若复数$z=1+2 i+i^{3}$，则$|z|=$", "ques_subject": 1, "ques_id": "726e139c-33a9-11ec-bd9e-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["0", "1", "$\\\\sqrt{2}$", "2"], "ques_answer": "C", "know_list": [0, 19, 269], "know_name": ["代数", "数系的扩充与复数", "复数代数形式的加减运算"], "difficulty": 0.566538, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
+{"ques_content": "已知集合$A=\\left\\{x \\mid x^{2}-3 x-4<0\\right\\}, \\quad B=\\{-4,1,3,5\\}, \\quad$ 则 $A \\cap B=$", "ques_subject": 1, "ques_id": "726cdbec-33a9-11ec-909c-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["\\\\{-4,1\\\\}", "\\\\{1,5\\\\}", "\\\\{3,5\\\\}", "\\\\{1,3\\\\}"], "ques_answer": "D", "know_list": [0, 10, 57], "know_name": ["代数", "集合", "集合的相等"], "difficulty": 0.424379, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "若复数$z=1+2 i+i^{3}$，则$|z|=$", "ques_subject": 1, "ques_id": "726e139c-33a9-11ec-bd9e-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["0", "1", "$\\\\sqrt{2}$", "2"], "ques_answer": "C", "know_list": [0, 19, 269], "know_name": ["代数", "数系的扩充与复数", "复数代数形式的加减运算"], "difficulty": 0.566538, "ques_figure_ids": [], "ques_figure_paths": []}
 {"ques_content": "埃及胡夫金字塔是古代世界建筑奇迹之一，它的形状可视为一个正四棱锥。以该四棱锥的高为边长的正方形面积等于该四棱锥一个侧面三角形的面积，则其侧面三角形底边上的高与底面正方形的边长的比值为", "ques_subject": 1, "ques_id": "726e3a92-33a9-11ec-88d7-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{\\\\sqrt{5}-1}{4}$", "$\\\\frac{\\\\sqrt{5}-1}{2}$", "$\\\\frac{\\\\sqrt{5}+1}{4}$", "$\\\\frac{\\\\sqrt{5}+1}{2}$"], "ques_answer": "C", "know_list": [6, 30, 511], "know_name": ["立体几何", "空间几何体", "棱柱的结构特征"], "difficulty": 0.604718, "ques_figure_ids": ["726e3a92-33a9-11ec-88d7-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d66b18-33a9-11ec-a11a-98fa9b625adb.png"]}
-{"ques_content": "设$O$为正方形$ABCD$中心，在$O, A, B, C, D$中任取$3$点，则取到的$3$点共线的概率为", "ques_subject": 1, "ques_id": "726e3a93-33a9-11ec-9d16-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{1}{5}$", "$\\\\frac{2}{5}$", "$\\\\frac{1}{2}$", "$\\\\frac{4}{5}$"], "ques_answer": "A", "know_list": [1, 21, 309], "know_name": ["排列组合与概率统计", "概率", "古典概型及其概率计算公式"], "difficulty": 0.455177, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
+{"ques_content": "设$O$为正方形$ABCD$中心，在$O, A, B, C, D$中任取$3$点，则取到的$3$点共线的概率为", "ques_subject": 1, "ques_id": "726e3a93-33a9-11ec-9d16-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{1}{5}$", "$\\\\frac{2}{5}$", "$\\\\frac{1}{2}$", "$\\\\frac{4}{5}$"], "ques_answer": "A", "know_list": [1, 21, 309], "know_name": ["排列组合与概率统计", "概率", "古典概型及其概率计算公式"], "difficulty": 0.455177, "ques_figure_ids": [], "ques_figure_paths": []}
 {"ques_content": "某校一个课外学习小组为研究某作物的发芽率$y$和温度$x$（单位：$^{\\circ} \\mathrm{C}$）的关系，在$20$个不同温度条件下进行种子发芽实验，由实验数据$\\left(x_{i}, y_{i}\\right)(i=1,2, \\cdots, 20)$得到下面的散点图：$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$由此散点图，在$10$$^{\\circ} \\mathrm{C}$至$40$$^{\\circ} \\mathrm{C}$之间，下面四个回归方程类型中最适宜作为发芽率$y$和温度$x$的回归方程类型的是", "ques_subject": 1, "ques_id": "726e618c-33a9-11ec-9f9e-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$y=a+b x$", "$y=a+b x^{2}$", "$y=a+b e^{x}$", "$y=a+b \\\\ln x$"], "ques_answer": "D", "know_list": [1, 20, 286], "know_name": ["排列组合与概率统计", "统计与统计案例", "变量间的相关关系"], "difficulty": 0.530059, "ques_figure_ids": ["726e618c-33a9-11ec-9f9e-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d69210-33a9-11ec-b2fe-98fa9b625adb.png"]}
-{"ques_content": "已知圆$x^{2}+y^{2}-6 x=0$，过点($1,2)$的直线被该圆所截得的弦的长度的最小值为", "ques_subject": 1, "ques_id": "726e8886-33a9-11ec-b0d0-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["1", "2", "3", "4"], "ques_answer": "A", "know_list": [5, 27, 440], "know_name": ["平面解析几何", "直线与方程", "斜率的计算公式"], "difficulty": 0.58802, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
+{"ques_content": "已知圆$x^{2}+y^{2}-6 x=0$，过点($1,2)$的直线被该圆所截得的弦的长度的最小值为", "ques_subject": 1, "ques_id": "726e8886-33a9-11ec-b0d0-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["1", "2", "3", "4"], "ques_answer": "A", "know_list": [5, 27, 440], "know_name": ["平面解析几何", "直线与方程", "斜率的计算公式"], "difficulty": 0.58802, "ques_figure_ids": [], "ques_figure_paths": []}
 {"ques_content": "设函数$f(x)=\\cos \\left(\\omega x+\\frac{\\pi}{6}\\right)$ 在 $[-\\pi, \\pi]$的图像大致如下图，则$f(x)$的最小周期为", "ques_subject": 1, "ques_id": "726e8887-33a9-11ec-a994-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{10 \\\\pi}{9}$", "$\\\\frac{7 \\\\pi}{6}$", "$\\\\frac{4\\\\pi}{3}$", "$\\\\frac{3 \\\\pi}{2}$"], "ques_answer": "C", "know_list": [4, 26, 422], "know_name": ["三角函数", "三角函数", "函数y=Asin(ωx +ф)的图像变换"], "difficulty": 0.421256, "ques_figure_ids": ["726e8887-33a9-11ec-a994-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d6b902-33a9-11ec-b912-98fa9b625adb.png"]}
-{"ques_content": "设对数$a \\log _{3} 4=2,$ 则 $4^{-a}=$", "ques_subject": 1, "ques_id": "726eb0ac-33a9-11ec-b339-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{1}{16}$", "$\\\\frac{1}{9}$", "$\\\\frac{1}{8}$", "$\\\\frac{1}{6}$"], "ques_answer": "B", "know_list": [0, 13, 129], "know_name": ["代数", " 基本初等函数Ⅰ", "指数函数的实际应用"], "difficulty": 0.34596, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
+{"ques_content": "设对数$a \\log _{3} 4=2,$ 则 $4^{-a}=$", "ques_subject": 1, "ques_id": "726eb0ac-33a9-11ec-b339-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{1}{16}$", "$\\\\frac{1}{9}$", "$\\\\frac{1}{8}$", "$\\\\frac{1}{6}$"], "ques_answer": "B", "know_list": [0, 13, 129], "know_name": ["代数", " 基本初等函数Ⅰ", "指数函数的实际应用"], "difficulty": 0.34596, "ques_figure_ids": [], "ques_figure_paths": []}
 {"ques_content": "执行右面的程序框图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$，则输出的$n=$", "ques_subject": 1, "ques_id": "726ed764-33a9-11ec-9fd2-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["17", "19", "21", "23"], "ques_answer": "C", "know_list": [2, 23, 351], "know_name": ["算法与框图", "算法初步与框图", "程序框图"], "difficulty": 0.78378, "ques_figure_ids": ["726ed764-33a9-11ec-9fd2-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d6dff8-33a9-11ec-8bfa-98fa9b625adb.png"]}
-{"ques_content": "设$\\left\\{a_{n}\\right\\}$是等比数列，且$a_{1}+a_{2}+a_{3}=1, a_{2}+a_{3}+a_{4}=2,$ 则 $a_{6}+a_{7}+a_{8}=$", "ques_subject": 1, "ques_id": "726ed765-33a9-11ec-b319-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["12", "24", "30", "32"], "ques_answer": "D", "know_list": [0, 17, 213], "know_name": ["代数", "数列", "等比数列"], "difficulty": 0.455039, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "设$F_{1}, F_{2}$是双曲线$C: x^{2}-\\frac{y^{2}}{3}=1$的两个焦点，$O$为坐标原点，点$P$在$C$上且$|O P|=2$，则$\\triangle P F_{1} F_{2}$的面积为", "ques_subject": 1, "ques_id": "726efed0-33a9-11ec-a18c-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{7}{2}$", "3", "$\\\\frac{5}{2}$", "2"], "ques_answer": "B", "know_list": [5, 29, 494], "know_name": ["平面解析几何", "圆锥曲线与方程", "双曲线的定义"], "difficulty": 0.393424, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "已知$A, B, C$为球$O$的球面上的三个点，$\\odot O_{1}$ 为 $\\triangle A B C$ 的外接圆，若 $\\odot O_{1}$ 的面积为 $4 \\pi$，$A B=B C=A C=O O_{1},$ 则球 $O$ 的表面积为", "ques_subject": 1, "ques_id": "726f25f0-33a9-11ec-8501-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$64 \\\\pi$", "$48 \\\\pi$", "$36 \\\\pi$", "$32 \\\\pi$"], "ques_answer": "A", "know_list": [6, 31, 569], "know_name": ["立体几何", "空间向量与立体几何", "用空间向量求直线间的夹角、距离"], "difficulty": 0.365152, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "若$x,y$满足约束条件$\\left\\{\\begin{array}{c}2 x+y-2 \\leq 0 \\\\ x-y-1 \\geq 0 \\\\ y+1 \\geq 0\\end{array}\\right.$，则$z=x+7 y$的最大值为_______", "ques_subject": 1, "ques_id": "726f25f1-33a9-11ec-82f6-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "1", "know_list": [4, 25, 379], "know_name": ["三角函数", "三角函数及其恒等变换", "三角函数的定义域"], "difficulty": 0.371465, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "设向量$a=(1,-1), \\quad b=(m+1,2 m-4)$，若$a \\perp b$，则$m=$_______", "ques_subject": 1, "ques_id": "726f4ce4-33a9-11ec-8c62-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "5", "know_list": [4, 25, 385], "know_name": ["三角函数", "三角函数及其恒等变换", "同角三角函数间的基本关系"], "difficulty": 0.49898, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "曲线$y=\\ln x+x+1$的一条切线的斜率为$2$，则该切线的方程为_______", "ques_subject": 1, "ques_id": "726f4ce5-33a9-11ec-b1f4-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "$2 x-y=0$", "know_list": [0, 13, 134], "know_name": ["代数", " 基本初等函数Ⅰ", "换底公式的应用"], "difficulty": 0.755708, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "数列$\\left\\{a_{n}\\right\\}$满足$a_{n+2}+(-1)^{n} a_{n}=3 n-1$，前$16$项和为$540$，则$\\left\\{a_{1}\\right\\}=$_______", "ques_subject": 1, "ques_id": "726f737a-33a9-11ec-8c30-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "$\\left\\{a_{1}\\right\\}=7$", "know_list": [7, 33, 587], "know_name": ["高等数学", "矩阵与变换", "二阶矩阵"], "difficulty": 0.559559, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "某厂接受了一项加工业务，加工出来的产品（单位：件）按标准分为$A, B, C, D$四个等级。加工业务约定：对于$A$级品，$B$级品，$C$级品，厂家每件分别收取加工费$90$元，$50$元，$20$元；对于$D$级品，厂家每件要赔偿原料损失费$50$元。该厂有甲、乙两个分厂可承接加工业务，甲分厂加工成本费为$25$元/件，乙分厂加工成本费为$20$元/件。厂家为决定由哪个分厂承接加工业务，在两个分厂各试加工了$100$件这种产品，并统计了这些产品的等级，整理如下：分别估计甲、乙两分厂加工出来的一件产品为$A$级品的概率；分别求甲、乙两分厂加工出来的$100$件产品的平均利润，以平均利润为依据，厂家应选哪个分厂承接加工业务？", "ques_subject": 1, "ques_id": "726f9938-33a9-11ec-a236-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "（1）0.4和0.28；（2）$x+y+z=1$", "know_list": [0, 14, 164], "know_name": ["代数", "函数的应用", "函数模型的选择与应用"], "difficulty": 0.29537, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "$\\triangle A B C$ 的内角为 $A, \\quad B, \\quad C$的对边分别为$a, b, c$，已知$B=150^{\\circ}$。若$a=\\sqrt{3} c, \\quad b=2 \\sqrt{7}, \\quad$ 求 $\\triangle A B C$ 的面积；若$\\sin A+\\sqrt{3} \\sin C=\\frac{\\sqrt{2}}{2}, \\quad$ 求 $C$", "ques_subject": 1, "ques_id": "726f9939-33a9-11ec-981c-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "（1）$S_{\\triangle A B C}=\\sqrt{3}$；（2）$C=\\frac{\\pi}{12}$。", "know_list": [4, 26, 436], "know_name": ["三角函数", "三角函数", "解三角形"], "difficulty": 0.286434, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$，$D$ 为圆锥的顶点，$O$是圆锥底面的圆心，$\\triangle A B C$是底面的内接正三角形，$P$ 为$DO$上一点，$\\angle A P C=90^{\\circ}$。证明：平面$P A B \\perp$平面$P A C $设$D O=\\sqrt{2}$，圆锥的侧面积为$\\sqrt{3} \\pi$，求三棱锥$P-A B C$的体积。", "ques_subject": 1, "ques_id": "726fc02e-33a9-11ec-99e4-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "", "know_list": [6, 31, 555], "know_name": ["立体几何", "空间向量与立体几何", "空间点、线、面的位置"], "difficulty": 0.339271, "ques_figure_ids": ["726fc02e-33a9-11ec-99e4-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d72de2-33a9-11ec-84f7-98fa9b625adb.png"]}
-{"ques_content": "已知函数$f(x)=e^{x}-a(x+2)$当$a=1$时，讨论$f(x)$的单调性；若$f(x)$有两个零点，求$a$的取值范围", "ques_subject": 1, "ques_id": "726fc02f-33a9-11ec-8019-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "（1）$f(x)$在$(-\\infty, 0)$上单调递减，在$(0, +\\infty)$上单调递增\n（2）$\\left(e^{-1},+\\infty\\right)$", "know_list": [0, 15, 177], "know_name": ["代数", "导数及其应用", "利用导数研究函数的极值"], "difficulty": 0.270787, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "已知$A,B$分别为椭圆$E: \\frac{x^{2}}{a^{2}}+y^{2}=1 \\quad a>1$的左、右顶点，$G$ 为$E$的上顶点， $\\overrightarrow{A G} \\cdot \\overrightarrow{G B}=8$。$P$为直线$x=6$的动点，$P A $与$ E$的另一交点为 $C$, $PB$与$E$的另一交点为$D$求$E$的方程证明：直线$CD$过定点", "ques_subject": 1, "ques_id": "726fe850-33a9-11ec-9724-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "（1）$\\frac{x^{2}}{9}+y^{2}=1$；（2）$\\left(\\frac{3}{2}, 0\\right)$", "know_list": [5, 29, 486], "know_name": ["平面解析几何", "圆锥曲线与方程", "椭圆的定义"], "difficulty": 0.358355, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "[选修$4-4$:坐标系与参数方程]\n在直角坐标系$xOy$中，曲线$C_1$的参数方程为$\\left\\{\\begin{array}{l}x=\\cos ^{k} t \\\\ y=\\sin ^{k} t\\end{array}\\right.$（$t$为参数），以坐标原点为极点，$x$轴正半轴为极轴建立极坐标系，曲线$C_2$的极坐标方程为$4 \\rho \\cos \\theta-16 \\rho \\sin \\theta+3=0$当$k=1$时，$C_1$是什么曲线？当$k=4$时，求$C_1$与$C_2$的公共点的直角坐标", "ques_subject": 1, "ques_id": "726fe851-33a9-11ec-bf44-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "（1）以原点为圆心，以1为半径的圆；\n（2）$\\left(\\frac{1}{4}, \\frac{1}{4}\\right)$", "know_list": [7, 35, 615], "know_name": ["高等数学", "坐标系与参数方程", "简单曲线的极坐标方程"], "difficulty": 0.331245, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "[选修$4-5$:不等式选讲]\n已知函数$f(x)=|3 x+1|-2|x|$画出$y=f(x)$的图像求不等式$f(x)>f(x+1)$的解集", "ques_subject": 1, "ques_id": "72700f52-33a9-11ec-bdd0-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": "", "ques_answer": "（1）如图；（2）$\\left(-\\infty,-\\frac{7}{6}\\right)$", "know_list": [7, 36, 635], "know_name": ["高等数学", "不等式选讲", "绝对值不等式"], "difficulty": 0.517198, "ques_figure_ids": ["72700f52-33a9-11ec-bdd0-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d754d2-33a9-11ec-8dee-98fa9b625adb.png"]}
-{"ques_content": "$1.$已知集合 $A=\\{x||x|<3, x \\in Z\\}, \\quad B=\\{x||x|>1, x \\in \\mathbf{Z}\\}, \\quad$ 则 $A \\cap B=$", "ques_subject": 1, "ques_id": "72700f53-33a9-11ec-8395-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\varnothing$", "$\\\\{-3,-2,2,3\\\\}$", "$\\\\{-2,0,2\\\\}$", "$\\\\{-2,2\\\\}$"], "ques_answer": "D", "know_list": [0, 10, 57], "know_name": ["代数", "集合", "集合的相等"], "difficulty": 0.349825, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
-{"ques_content": "复数 $(1-i)^{4}=$", "ques_subject": 1, "ques_id": "7270351c-33a9-11ec-82f2-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["-4", "4", "$-4i$", "$4i$"], "ques_answer": "A", "know_list": [0, 19, 269], "know_name": ["代数", "数系的扩充与复数", "复数代数形式的加减运算"], "difficulty": 0.649847, "ques_figure_ids": NaN, "ques_figure_paths": NaN}
\ No newline at end of file
+{"ques_content": "设$\\left\\{a_{n}\\right\\}$是等比数列，且$a_{1}+a_{2}+a_{3}=1, a_{2}+a_{3}+a_{4}=2,$ 则 $a_{6}+a_{7}+a_{8}=$", "ques_subject": 1, "ques_id": "726ed765-33a9-11ec-b319-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["12", "24", "30", "32"], "ques_answer": "D", "know_list": [0, 17, 213], "know_name": ["代数", "数列", "等比数列"], "difficulty": 0.455039, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "设$F_{1}, F_{2}$是双曲线$C: x^{2}-\\frac{y^{2}}{3}=1$的两个焦点，$O$为坐标原点，点$P$在$C$上且$|O P|=2$，则$\\triangle P F_{1} F_{2}$的面积为", "ques_subject": 1, "ques_id": "726efed0-33a9-11ec-a18c-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\frac{7}{2}$", "3", "$\\\\frac{5}{2}$", "2"], "ques_answer": "B", "know_list": [5, 29, 494], "know_name": ["平面解析几何", "圆锥曲线与方程", "双曲线的定义"], "difficulty": 0.393424, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "已知$A, B, C$为球$O$的球面上的三个点，$\\odot O_{1}$ 为 $\\triangle A B C$ 的外接圆，若 $\\odot O_{1}$ 的面积为 $4 \\pi$，$A B=B C=A C=O O_{1},$ 则球 $O$ 的表面积为", "ques_subject": 1, "ques_id": "726f25f0-33a9-11ec-8501-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$64 \\\\pi$", "$48 \\\\pi$", "$36 \\\\pi$", "$32 \\\\pi$"], "ques_answer": "A", "know_list": [6, 31, 569], "know_name": ["立体几何", "空间向量与立体几何", "用空间向量求直线间的夹角、距离"], "difficulty": 0.365152, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "若$x,y$满足约束条件$\\left\\{\\begin{array}{c}2 x+y-2 \\leq 0 \\\\ x-y-1 \\geq 0 \\\\ y+1 \\geq 0\\end{array}\\right.$，则$z=x+7 y$的最大值为_______", "ques_subject": 1, "ques_id": "726f25f1-33a9-11ec-82f6-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "1", "know_list": [4, 25, 379], "know_name": ["三角函数", "三角函数及其恒等变换", "三角函数的定义域"], "difficulty": 0.371465, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "设向量$a=(1,-1), \\quad b=(m+1,2 m-4)$，若$a \\perp b$，则$m=$_______", "ques_subject": 1, "ques_id": "726f4ce4-33a9-11ec-8c62-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "5", "know_list": [4, 25, 385], "know_name": ["三角函数", "三角函数及其恒等变换", "同角三角函数间的基本关系"], "difficulty": 0.49898, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "曲线$y=\\ln x+x+1$的一条切线的斜率为$2$，则该切线的方程为_______", "ques_subject": 1, "ques_id": "726f4ce5-33a9-11ec-b1f4-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "$2 x-y=0$", "know_list": [0, 13, 134], "know_name": ["代数", " 基本初等函数Ⅰ", "换底公式的应用"], "difficulty": 0.755708, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "数列$\\left\\{a_{n}\\right\\}$满足$a_{n+2}+(-1)^{n} a_{n}=3 n-1$，前$16$项和为$540$，则$\\left\\{a_{1}\\right\\}=$_______", "ques_subject": 1, "ques_id": "726f737a-33a9-11ec-8c30-98fa9b625adb", "ques_type": 2, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "$\\left\\{a_{1}\\right\\}=7$", "know_list": [7, 33, 587], "know_name": ["高等数学", "矩阵与变换", "二阶矩阵"], "difficulty": 0.559559, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "某厂接受了一项加工业务，加工出来的产品（单位：件）按标准分为$A, B, C, D$四个等级。加工业务约定：对于$A$级品，$B$级品，$C$级品，厂家每件分别收取加工费$90$元，$50$元，$20$元；对于$D$级品，厂家每件要赔偿原料损失费$50$元。该厂有甲、乙两个分厂可承接加工业务，甲分厂加工成本费为$25$元/件，乙分厂加工成本费为$20$元/件。厂家为决定由哪个分厂承接加工业务，在两个分厂各试加工了$100$件这种产品，并统计了这些产品的等级，整理如下：分别估计甲、乙两分厂加工出来的一件产品为$A$级品的概率；分别求甲、乙两分厂加工出来的$100$件产品的平均利润，以平均利润为依据，厂家应选哪个分厂承接加工业务？", "ques_subject": 1, "ques_id": "726f9938-33a9-11ec-a236-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "（1）0.4和0.28；（2）$x+y+z=1$", "know_list": [0, 14, 164], "know_name": ["代数", "函数的应用", "函数模型的选择与应用"], "difficulty": 0.29537, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "$\\triangle A B C$ 的内角为 $A, \\quad B, \\quad C$的对边分别为$a, b, c$，已知$B=150^{\\circ}$。若$a=\\sqrt{3} c, \\quad b=2 \\sqrt{7}, \\quad$ 求 $\\triangle A B C$ 的面积；若$\\sin A+\\sqrt{3} \\sin C=\\frac{\\sqrt{2}}{2}, \\quad$ 求 $C$", "ques_subject": 1, "ques_id": "726f9939-33a9-11ec-981c-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "（1）$S_{\\triangle A B C}=\\sqrt{3}$；（2）$C=\\frac{\\pi}{12}$。", "know_list": [4, 26, 436], "know_name": ["三角函数", "三角函数", "解三角形"], "difficulty": 0.286434, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$，$D$ 为圆锥的顶点，$O$是圆锥底面的圆心，$\\triangle A B C$是底面的内接正三角形，$P$ 为$DO$上一点，$\\angle A P C=90^{\\circ}$。证明：平面$P A B \\perp$平面$P A C $设$D O=\\sqrt{2}$，圆锥的侧面积为$\\sqrt{3} \\pi$，求三棱锥$P-A B C$的体积。", "ques_subject": 1, "ques_id": "726fc02e-33a9-11ec-99e4-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "", "know_list": [6, 31, 555], "know_name": ["立体几何", "空间向量与立体几何", "空间点、线、面的位置"], "difficulty": 0.339271, "ques_figure_ids": ["726fc02e-33a9-11ec-99e4-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d72de2-33a9-11ec-84f7-98fa9b625adb.png"]}
+{"ques_content": "已知函数$f(x)=e^{x}-a(x+2)$当$a=1$时，讨论$f(x)$的单调性；若$f(x)$有两个零点，求$a$的取值范围", "ques_subject": 1, "ques_id": "726fc02f-33a9-11ec-8019-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "（1）$f(x)$在$(-\\infty, 0)$上单调递减，在$(0, +\\infty)$上单调递增\n（2）$\\left(e^{-1},+\\infty\\right)$", "know_list": [0, 15, 177], "know_name": ["代数", "导数及其应用", "利用导数研究函数的极值"], "difficulty": 0.270787, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "已知$A,B$分别为椭圆$E: \\frac{x^{2}}{a^{2}}+y^{2}=1 \\quad a>1$的左、右顶点，$G$ 为$E$的上顶点， $\\overrightarrow{A G} \\cdot \\overrightarrow{G B}=8$。$P$为直线$x=6$的动点，$P A $与$ E$的另一交点为 $C$, $PB$与$E$的另一交点为$D$求$E$的方程证明：直线$CD$过定点", "ques_subject": 1, "ques_id": "726fe850-33a9-11ec-9724-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "（1）$\\frac{x^{2}}{9}+y^{2}=1$；（2）$\\left(\\frac{3}{2}, 0\\right)$", "know_list": [5, 29, 486], "know_name": ["平面解析几何", "圆锥曲线与方程", "椭圆的定义"], "difficulty": 0.358355, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "[选修$4-4$:坐标系与参数方程]\n在直角坐标系$xOy$中，曲线$C_1$的参数方程为$\\left\\{\\begin{array}{l}x=\\cos ^{k} t \\\\ y=\\sin ^{k} t\\end{array}\\right.$（$t$为参数），以坐标原点为极点，$x$轴正半轴为极轴建立极坐标系，曲线$C_2$的极坐标方程为$4 \\rho \\cos \\theta-16 \\rho \\sin \\theta+3=0$当$k=1$时，$C_1$是什么曲线？当$k=4$时，求$C_1$与$C_2$的公共点的直角坐标", "ques_subject": 1, "ques_id": "726fe851-33a9-11ec-bf44-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "（1）以原点为圆心，以1为半径的圆；\n（2）$\\left(\\frac{1}{4}, \\frac{1}{4}\\right)$", "know_list": [7, 35, 615], "know_name": ["高等数学", "坐标系与参数方程", "简单曲线的极坐标方程"], "difficulty": 0.331245, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "[选修$4-5$:不等式选讲]\n已知函数$f(x)=|3 x+1|-2|x|$画出$y=f(x)$的图像求不等式$f(x)>f(x+1)$的解集", "ques_subject": 1, "ques_id": "72700f52-33a9-11ec-bdd0-98fa9b625adb", "ques_type": 5, "ques_system": 10, "ques_period": 2, "ques_options": [], "ques_answer": "（1）如图；（2）$\\left(-\\infty,-\\frac{7}{6}\\right)$", "know_list": [7, 36, 635], "know_name": ["高等数学", "不等式选讲", "绝对值不等式"], "difficulty": 0.517198, "ques_figure_ids": ["72700f52-33a9-11ec-bdd0-98fa9b625adb"], "ques_figure_paths": ["/share/luna/database-data/figure/LUNA-figure/7/73/73d754d2-33a9-11ec-8dee-98fa9b625adb.png"]}
+{"ques_content": "$1.$已知集合 $A=\\{x||x|<3, x \\in Z\\}, \\quad B=\\{x||x|>1, x \\in \\mathbf{Z}\\}, \\quad$ 则 $A \\cap B=$", "ques_subject": 1, "ques_id": "72700f53-33a9-11ec-8395-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["$\\\\varnothing$", "$\\\\{-3,-2,2,3\\\\}$", "$\\\\{-2,0,2\\\\}$", "$\\\\{-2,2\\\\}$"], "ques_answer": "D", "know_list": [0, 10, 57], "know_name": ["代数", "集合", "集合的相等"], "difficulty": 0.349825, "ques_figure_ids": [], "ques_figure_paths": []}
+{"ques_content": "复数 $(1-i)^{4}=$", "ques_subject": 1, "ques_id": "7270351c-33a9-11ec-82f2-98fa9b625adb", "ques_type": 7, "ques_system": 10, "ques_period": 2, "ques_options": ["-4", "4", "$-4i$", "$4i$"], "ques_answer": "A", "know_list": [0, 19, 269], "know_name": ["代数", "数系的扩充与复数", "复数代数形式的加减运算"], "difficulty": 0.649847, "ques_figure_ids": [], "ques_figure_paths": []}
\ No newline at end of file
diff --git a/tests/test_i2v/test_pretrained.py b/tests/test_i2v/test_pretrained.py
index 22e8cf5b..9ff72edc 100644
--- a/tests/test_i2v/test_pretrained.py
+++ b/tests/test_i2v/test_pretrained.py
@@ -4,6 +4,7 @@
 from EduNLP import get_pretrained_i2v
 # from EduNLP.I2V.i2v import MODELS
 from EduNLP.I2V import D2V, W2V
+from EduNLP.Vector import get_pretrained_model_info, get_all_pretrained_models
 
 
 def test_pretrained_i2v(tmp_path):
@@ -11,6 +12,12 @@ def test_pretrained_i2v(tmp_path):
     d = tmp_path / "model"
     d.mkdir()
 
+    url, t2v_name = get_pretrained_model_info("d2v_test_256")
+    assert url != ""
+    assert t2v_name == "d2v"
+    model_names = get_all_pretrained_models()
+    assert "d2v_test_256" in model_names
+
     get_pretrained_i2v("d2v_test_256", d)
 
     with pytest.raises(KeyError):
@@ -18,11 +25,8 @@ def test_pretrained_i2v(tmp_path):
 
     get_pretrained_i2v("w2v_test_256", d)
 
-    get_pretrained_i2v("quesnet_test_256", d)
-
-    get_pretrained_i2v("elmo_test", d)
+#     get_pretrained_i2v("quesnet_test_256", d)
 
-    # get_pretrained_i2v("tal_edu_bert", d)
+#     get_pretrained_i2v("elmo_test", d)
 
-    with pytest.raises(KeyError):
-        get_pretrained_i2v("error")
+#     # get_pretrained_i2v("tal_edu_bert", d)
diff --git a/tests/test_model_zoo/test_rnn.py b/tests/test_model_zoo/test_rnn.py
new file mode 100644
index 00000000..821bcdb7
--- /dev/null
+++ b/tests/test_model_zoo/test_rnn.py
@@ -0,0 +1,18 @@
+import torch
+from EduNLP.ModelZoo.rnn import LM
+
+
+idxs = torch.tensor([
+    [1, 2, 3, 4, 0, 0],
+    [1, 2, 0, 0, 0, 0],
+    [1, 0, 0, 0, 0, 0],
+    [1, 2, 0, 0, 0, 0]
+])
+
+lens = torch.tensor([4, 2, 1, 2])
+
+rnn = LM(rnn_type="lstm", vocab_size=20, embedding_dim=5, hidden_size=10)
+output, hn = rnn(idxs, lens)
+
+print("[output]", output)
+print("[hn]", hn)
diff --git a/tests/test_pipeline/conftest.py b/tests/test_pipeline/conftest.py
new file mode 100644
index 00000000..6769d2b3
--- /dev/null
+++ b/tests/test_pipeline/conftest.py
@@ -0,0 +1,21 @@
+import pytest
+from PIL import Image
+from EduNLP.utils import abs_current_dir, path_append
+from EduNLP.Vector import get_pretrained_model_info
+from EduData import get_data
+
+
+@pytest.fixture(scope="module")
+def pretrained_elmo_for_property_prediction_dir():
+    model_dir = path_append(abs_current_dir(__file__), "../../examples/test_model/elmo", to_str=True)
+    url, _ = get_pretrained_model_info('elmo_pp_test')
+    path = get_data(url, model_dir)
+    return path
+
+
+@pytest.fixture(scope="module")
+def pretrained_elmo_for_knowledge_prediction_dir():
+    model_dir = path_append(abs_current_dir(__file__), "../../examples/test_model/elmo", to_str=True)
+    url, _ = get_pretrained_model_info('elmo_kp_test')
+    path = get_data(url, model_dir)
+    return path
diff --git a/tests/test_pipeline/test_pipelines.py b/tests/test_pipeline/test_pipelines.py
new file mode 100644
index 00000000..d0a51ffd
--- /dev/null
+++ b/tests/test_pipeline/test_pipelines.py
@@ -0,0 +1,124 @@
+from EduNLP.Pipeline import pipeline
+from EduNLP.Pipeline.components import PREPROCESSING_PIPES
+from EduNLP.ModelZoo.rnn import ElmoLMForPropertyPrediction, ElmoLMForKnowledgePrediction
+from EduNLP.Pretrain import ElmoTokenizer
+import pytest
+
+
+class TestPipelines:
+    def test_preprocessing_pipeline(self):
+        item = "如图所示，则三角形ABC的面积是_。"
+        items = [item, item]
+        processor = pipeline(preprocess=['is_sif', 'to_sif', 'is_sif', 'seg_describe'])
+        processor.add_pipe(name='seg', symbol='fm', before='seg_describe')
+        assert processor.component_names == ['is_sif', 'to_sif', 'is_sif', 'seg', 'seg_describe']
+        assert len(processor.component_names) == len(processor.pipeline)
+        processor(item)
+        processor(items)
+
+        processor.remove_pipe(0)
+        processor.remove_pipe('to_sif')
+        processor.rename_pipe(1, 'seg_pipe')
+        assert processor.component_names == ['is_sif', 'seg_pipe', 'seg_describe']
+
+        processor = pipeline(preprocess=[item for item in PREPROCESSING_PIPES.keys()])
+        processor(item)
+        assert len(processor.component_names) == len(PREPROCESSING_PIPES)
+
+    def test_error_usage_pipeline(self, pretrained_elmo_for_property_prediction_dir):
+        pretrained_elmo_for_pp = ElmoLMForPropertyPrediction.from_pretrained(
+            pretrained_elmo_for_property_prediction_dir)
+        pretrained_elmo_tokenizer = ElmoTokenizer.from_pretrained(pretrained_elmo_for_property_prediction_dir)
+        processor = pipeline(preprocess=['is_sif', 'seg_describe'])
+        with pytest.raises(ValueError):
+            pipeline(preprocess=['hallo', 'Welt'])
+        with pytest.raises(ValueError):
+            processor.add_pipe('to_sif', before='is_sif', after='is_sif')
+        with pytest.raises(ValueError):
+            processor.add_pipe('to_sif', before=-1)
+        with pytest.raises(ValueError):
+            processor.add_pipe('to_sif', after=4)
+        with pytest.raises(ValueError):
+            processor.add_pipe('to_sif', before='missing_pipe')
+        with pytest.raises(ValueError):
+            processor.add_pipe('to_sif', after='missing_pipe')
+        with pytest.raises(ValueError):
+            processor.add_pipe('to_sif', first=True, last=True)
+        with pytest.raises(ValueError):
+            processor.rename_pipe('Im_not_here', 'got_you')
+        with pytest.raises(ValueError):
+            processor.add_pipe('pipe_running_away')
+        with pytest.raises(ValueError):
+            processor.remove_pipe('I_do_not_exist')
+
+        with pytest.raises(RuntimeError):
+            pipeline()
+        with pytest.raises(RuntimeError):
+            pipeline(task='property-prediction', tokenizer=pretrained_elmo_tokenizer)
+        with pytest.raises(RuntimeError):
+            pipeline(model=pretrained_elmo_for_pp)
+        with pytest.raises(KeyError):
+            pipeline(task='I-am-a-robot')
+        with pytest.raises(KeyError):
+            pipeline(task='property-prediction', model=1, tokenizer=2)
+        with pytest.raises(ValueError):
+            p = pipeline(task='knowledge-prediction', model=pretrained_elmo_for_pp, tokenizer=pretrained_elmo_tokenizer)
+            p("如图所示，则三角形ABC的面积是_。")
+
+    # def test_property_prediction_pipeline_with_default_model(self):
+    #     item = "如图所示，则三角形ABC的面积是_。"
+    #     items = [item, item]
+    #     processor = pipeline(task="property-prediction")
+    #     assert 0 <= processor(item) <= 1
+    #     assert len(processor(items)) == 2
+    #     processor = pipeline(task="property-prediction", preprocess=['is_sif', 'seg_describe'])
+    #     assert 0 <= processor(item) <= 1
+    #     assert len(processor(items)) == 2
+
+    def test_property_prediction_pipeline_with_specified_model(self, pretrained_elmo_for_property_prediction_dir):
+        item = "如图所示，则三角形ABC的面积是_。"
+        items = [item, item]
+        pretrained_elmo_for_pp = ElmoLMForPropertyPrediction.from_pretrained(
+            pretrained_elmo_for_property_prediction_dir)
+        pretrained_elmo_tokenizer = ElmoTokenizer.from_pretrained(pretrained_elmo_for_property_prediction_dir)
+        pretrained_elmo_for_pp.eval()
+        processor = pipeline(task="property-prediction",
+                             model=pretrained_elmo_for_pp,
+                             tokenizer=pretrained_elmo_tokenizer)
+        assert 0 <= processor(item)["property"] <= 1
+        assert len(processor(items)) == 2
+
+        processor.add_pipe("is_sif")
+        assert processor.component_names == ["is_sif", "tokenizer", "ElmoLMForPropertyPrediction",
+                                             "property-prediction"]
+        assert len(processor) == 4
+        processor.remove_pipe(0)
+        assert processor.component_names == ["tokenizer", "ElmoLMForPropertyPrediction", "property-prediction"]
+        assert len(processor.component_names) == len(processor.pipeline)
+
+    # def test_knowledge_prediction_pipeline_with_default_model(self):
+    #     item = "如图所示，则三角形ABC的面积是_。"
+    #     items = [item, item]
+    #     processor = pipeline(task="knowledge-prediction")
+    #     assert 0 <= processor(item) <= 1
+    #     assert len(processor(items)) == 2
+    #     processor = pipeline(task="knowledge-prediction", preprocess=['is_sif', 'seg_describe'])
+    #     assert 0 <= processor(item) <= 1
+    #     assert len(processor(items)) == 2
+
+    def test_knowledge_prediction_pipeline_with_specified_model(self, pretrained_elmo_for_knowledge_prediction_dir):
+        item = "如图所示，则三角形ABC的面积是_。"
+        items = [item, item]
+        pretrained_elmo_for_kp = ElmoLMForKnowledgePrediction.from_pretrained(
+            pretrained_elmo_for_knowledge_prediction_dir)
+        pretrained_elmo_tokenizer = ElmoTokenizer.from_pretrained(pretrained_elmo_for_knowledge_prediction_dir)
+        pretrained_elmo_for_kp.eval()
+        processor = pipeline(task="knowledge-prediction",
+                             model=pretrained_elmo_for_kp,
+                             tokenizer=pretrained_elmo_tokenizer)
+        assert isinstance(processor(item)["knowledge_list"], list)
+        assert isinstance(processor(item)["knowledge_scores"], list)
+        assert len(processor(items)[0]["knowledge_list"]) == len(processor(items)[1]["knowledge_list"])
+        processor.add_pipe("is_sif")
+        assert processor.component_names == ["is_sif", "tokenizer", "ElmoLMForKnowledgePrediction",
+                                             "knowledge-prediction"]
diff --git a/tests/test_pretrain/conftest.py b/tests/test_pretrain/conftest.py
new file mode 100644
index 00000000..e5e7d145
--- /dev/null
+++ b/tests/test_pretrain/conftest.py
@@ -0,0 +1,37 @@
+# coding: utf-8
+# 2021/5/30 @ tongshiwei
+import torch
+import pytest
+import os
+from EduNLP.utils import abs_current_dir, path_append
+from EduNLP.ModelZoo import load_items
+
+# TEST_GPU = torch.cuda.is_available()
+TEST_GPU = False
+
+
+@pytest.fixture(scope="module")
+def standard_luna_data():
+    data_path = path_append(abs_current_dir(__file__), "../../static/test_data/standard_luna_data.json", to_str=True)
+    _data = load_items(data_path)[:10]
+    return _data
+
+
+@pytest.fixture(scope="module")
+def pretrained_tokenizer_dir(tmp_path_factory):
+    return str(tmp_path_factory.mktemp("pretrained_tokenizer_dir"))
+
+
+@pytest.fixture(scope="module")
+def pretrained_model_dir(tmp_path_factory):
+    return str(tmp_path_factory.mktemp("pretrained_model_dir"))
+
+
+@pytest.fixture(scope="module")
+def pretrained_pp_dir(tmp_path_factory):
+    return str(tmp_path_factory.mktemp("pretrained_pp_dir"))
+
+
+@pytest.fixture(scope="module")
+def pretrained_kp_dir(tmp_path_factory):
+    return str(tmp_path_factory.mktemp("pretrained_kp_dir"))
diff --git a/tests/test_pretrain/test_hugginface_utils.py b/tests/test_pretrain/test_hugginface_utils.py
new file mode 100644
index 00000000..cb0de6a5
--- /dev/null
+++ b/tests/test_pretrain/test_hugginface_utils.py
@@ -0,0 +1,24 @@
+from EduNLP.Pretrain.hugginface_utils import TokenizerForHuggingface
+from transformers import AutoTokenizer
+import os
+
+
+# TODO
+class TestPretrainUtils:
+    def test_hf_tokenzier(self, pretrained_tokenizer_dir):
+        tokenizer = TokenizerForHuggingface(tokenize_method=None)
+        tokenizer = TokenizerForHuggingface(add_special_tokens=True)
+        assert isinstance(tokenizer.vocab_size, int)
+        item = 'This is a test.'
+        res = tokenizer.decode(tokenizer.encode(item))
+        right_ans = '[CLS] [UNK] is a test. [SEP]'
+        assert res == right_ans, res
+        items = ['This is a test.', 'This is a test 2.']
+        res = tokenizer.decode(tokenizer.encode(items))
+        right_ans = ['[CLS] [UNK] is a test. [SEP]', '[CLS] [UNK] is a test 2. [SEP]']
+        assert res == right_ans, res
+
+        tokenizer_hf = AutoTokenizer.from_pretrained("bert-base-chinese")
+        tokenizer_hf.save_pretrained(pretrained_tokenizer_dir)
+
+        tokenizer_hf = TokenizerForHuggingface.from_pretrained(pretrained_tokenizer_dir)
diff --git a/tests/test_pretrain/test_pretrain_utils.py b/tests/test_pretrain/test_pretrain_utils.py
new file mode 100644
index 00000000..2608925a
--- /dev/null
+++ b/tests/test_pretrain/test_pretrain_utils.py
@@ -0,0 +1,64 @@
+from EduNLP.Pretrain.pretrian_utils import EduVocab, PretrainedEduTokenizer, EduDataset
+import pytest
+import os
+
+
+class TestPretrainUtils:
+    def test_eduvocab(self):
+        test = EduVocab(specials=['token1'])
+        assert len(test) == 5
+        token_list = ['An', 'apple', 'a', 'day', 'keeps', 'doctors', 'away']
+        test.add_tokens(token_list)
+        right_ans = ['[PAD]', '[UNK]', '[BOS]', '[EOS]', 'token1',
+                     'An', 'apple', 'a', 'day', 'keeps', 'doctors', 'away']
+        assert test.tokens == right_ans
+        assert test.vocab_size == len(right_ans)
+        test_token_list = ['An', 'banana', 'is', 'a', 'kind', 'of', 'fruit']
+        res = test.convert_sequence_to_token(test.convert_sequence_to_idx(test_token_list, bos=True, eos=True))
+        right_ans = ['[BOS]', 'An', '[UNK]', '[UNK]', 'a', '[UNK]', '[UNK]', '[UNK]', '[EOS]']
+        assert res == right_ans
+        test.add_specials(['token2', 'token3'])
+        right_ans = ['[PAD]', '[UNK]', '[BOS]', '[EOS]', 'token1', 'token2', 'token3']
+        test.special_tokens == right_ans
+        test = EduVocab(corpus_items=[token_list])
+
+    def test_edu_tokenizer(self, pretrained_tokenizer_dir):
+        test = EduVocab()
+        token_list = ['An', 'apple', 'a', 'day', 'keeps', 'doctors', 'away']
+        test.add_tokens(token_list)
+        vocab_path = os.path.join(pretrained_tokenizer_dir, 'vocab.txt')
+        test.save_vocab(vocab_path)
+        test = EduVocab(vocab_path=vocab_path)
+
+        text = 'An apple a day keeps doctors away'
+        tokenizer = PretrainedEduTokenizer(vocab_path=vocab_path, max_length=100)
+        res = tokenizer(text, padding='max_length')
+        assert res['seq_idx'].shape[0] == 100
+        res = tokenizer(text, padding='longest')
+        assert res['seq_idx'].shape[0] == res['seq_len']
+        res = tokenizer(text, padding='do_not_pad')
+        assert res['seq_idx'].shape[0] == res['seq_len']
+        with pytest.raises(ValueError):
+            res = tokenizer(text, padding='wrong_pad')
+        tokenizer.add_tokens("[token]")
+        tokenizer.add_specials("[special]")
+        res = tokenizer.decode(tokenizer.encode({'content': 'An banana'}, key=lambda x: x['content']))
+        right_ans = ['An', '[UNK]']
+        print(res)
+        assert res == right_ans, res
+
+        res = tokenizer.decode(tokenizer.encode(['An banana']))
+        assert res == [['An', '[UNK]']]
+        tokenizer.save_pretrained(f"{pretrained_tokenizer_dir}/save_dir")
+
+    def test_edu_dateset(self, standard_luna_data, pretrained_tokenizer_dir):
+        tokenizer = PretrainedEduTokenizer()
+        tokenizer.set_vocab(standard_luna_data, key=lambda x: x["ques_content"])
+        dataset = EduDataset(tokenizer,
+                             items=standard_luna_data,
+                             stem_key="ques_content")
+        assert "seq_idx" in dataset[0].keys() and "seq_len" in dataset[0].keys()
+        dataset.to_disk(f"{pretrained_tokenizer_dir}/dataset")
+
+        local_dataset = EduDataset(tokenizer, f"{pretrained_tokenizer_dir}/dataset")
+        assert local_dataset[0] == dataset[0]
diff --git a/tests/test_pretrain/test_pretrained_bert.py b/tests/test_pretrain/test_pretrained_bert.py
new file mode 100644
index 00000000..80929a91
--- /dev/null
+++ b/tests/test_pretrain/test_pretrained_bert.py
@@ -0,0 +1,222 @@
+import os
+os.environ["CUDA_VISIBLE_DEVICES"] = ""
+
+import torch
+from EduNLP.ModelZoo.bert import BertForPropertyPrediction, BertForKnowledgePrediction
+from transformers import BertModel as HFBertModel
+from EduNLP.Pretrain import BertTokenizer, finetune_bert
+from EduNLP.Pretrain import finetune_bert_for_property_prediction, finetune_bert_for_knowledge_prediction
+from EduNLP.Vector import T2V, BertModel
+from EduNLP.I2V import Bert, get_pretrained_i2v
+
+from conftest import TEST_GPU
+
+
+class TestPretrainBert:
+    def test_tokenizer(self, standard_luna_data, pretrained_tokenizer_dir):
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        text_params = {
+            "granularity": "char",
+            # "stopwords": None,
+        }
+        tokenizer = BertTokenizer(pretrained_model="bert-base-chinese", add_specials=True,
+                                  tokenize_method="ast_formula", text_params=text_params)
+
+        tokenizer_size1 = len(tokenizer)
+        tokenizer.set_vocab(standard_luna_data, key=lambda x: x["ques_content"])
+        tokenizer_size2 = len(tokenizer)
+        assert tokenizer_size1 < tokenizer_size2
+        tokenizer.save_pretrained(pretrained_tokenizer_dir)
+        tokenizer = BertTokenizer.from_pretrained(pretrained_tokenizer_dir)
+        tokenizer_size3 = len(tokenizer)
+        assert tokenizer_size2 == tokenizer_size3
+        tokens = tokenizer.tokenize(test_items, key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], list)
+        tokens = tokenizer.tokenize(test_items[0], key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], str)
+        res = tokenizer(test_items, key=lambda x: x["ques_content"])
+        assert len(res["input_ids"].shape) == 2
+        res = tokenizer(test_items[0], key=lambda x: x["ques_content"])
+        assert len(res["input_ids"].shape) == 2
+        res = tokenizer(test_items, key=lambda x: x["ques_content"], return_tensors=False)
+        assert isinstance(res["input_ids"], list)
+
+    def test_train_model(self, standard_luna_data, pretrained_model_dir, pretrained_tokenizer_dir):
+        tokenizer = BertTokenizer.from_pretrained(pretrained_tokenizer_dir)
+        items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        finetune_bert(
+            standard_luna_data,
+            pretrained_model_dir,
+            data_params={
+                "stem_key": "ques_content",
+            },
+            train_params={
+                "num_train_epochs": 1,
+                "per_device_train_batch_size": 2,
+                "save_steps": 500,
+                "no_cuda": not TEST_GPU,
+            }
+        )
+        model = HFBertModel.from_pretrained(pretrained_model_dir)
+        tokenizer = BertTokenizer.from_pretrained(pretrained_model_dir)
+
+        encodes = tokenizer(items[0], lambda x: x['ques_content'])
+        model(**encodes)
+        encodes = tokenizer(items, lambda x: x['ques_content'])
+        model(**encodes)
+
+        finetune_bert(
+            standard_luna_data,
+            pretrained_model_dir,
+            pretrained_model=pretrained_model_dir,
+            data_params={
+                "stem_key": "ques_content",
+            },
+            train_params={
+                "num_train_epochs": 1,
+                "per_device_train_batch_size": 2,
+                "save_steps": 500,
+                "no_cuda": not TEST_GPU,
+            }
+        )
+
+    def test_train_pp(self, standard_luna_data, pretrained_pp_dir, pretrained_model_dir):
+        data_params = {
+            "stem_key": "ques_content",
+            "label_key": "difficulty"
+        }
+        train_params = {
+            "num_train_epochs": 1,
+            "per_device_train_batch_size": 2,
+            "per_device_eval_batch_size": 2,
+            "no_cuda": not TEST_GPU,
+        }
+        train_items = standard_luna_data
+        # train without eval_items
+        finetune_bert_for_property_prediction(
+            train_items,
+            pretrained_pp_dir,
+            pretrained_model=pretrained_model_dir,
+            train_params=train_params,
+            data_params=data_params
+        )
+        # train with eval_items
+        finetune_bert_for_property_prediction(
+            train_items,
+            pretrained_pp_dir,
+            pretrained_model=pretrained_model_dir,
+            eval_items=train_items,
+            train_params=train_params,
+            data_params=data_params
+        )
+        model = BertForPropertyPrediction.from_pretrained(pretrained_pp_dir)
+        tokenizer = BertTokenizer.from_pretrained(pretrained_pp_dir)
+
+        encodes = tokenizer(train_items[:8], lambda x: x['ques_content'])
+        # TODO: need to handle inference for T2V for batch or single
+        model(**encodes)
+
+    def test_train_kp(self, standard_luna_data, pretrained_model_dir, pretrained_kp_dir):
+        data_params = {
+            "stem_key": "ques_content",
+            "label_key": "know_list"
+        }
+        train_params = {
+            "num_train_epochs": 1,
+            "per_device_train_batch_size": 2,
+            "per_device_eval_batch_size": 2,
+            "no_cuda": not TEST_GPU,
+        }
+        model_params = {
+            "num_classes_list": [10, 27, 963],
+            "num_total_classes": 1000,
+        }
+        train_items = standard_luna_data
+        # train without eval_items
+        finetune_bert_for_knowledge_prediction(
+            train_items,
+            pretrained_kp_dir,
+            pretrained_model=pretrained_model_dir,
+            train_params=train_params,
+            data_params=data_params,
+            model_params=model_params
+        )
+        # train with eval_items
+        finetune_bert_for_knowledge_prediction(
+            train_items,
+            pretrained_kp_dir,
+            pretrained_model=pretrained_model_dir,
+            eval_items=train_items,
+            train_params=train_params,
+            data_params=data_params,
+            model_params=model_params
+        )
+        model = BertForKnowledgePrediction.from_pretrained(pretrained_kp_dir)
+        tokenizer = BertTokenizer.from_pretrained(pretrained_kp_dir)
+
+        encodes = tokenizer(train_items[:8], lambda x: x['ques_content'])
+        # TODO: need to handle inference for T2V for batch or single
+        model(**encodes)
+
+    def test_t2v(self, pretrained_model_dir):
+        items = [
+            {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer = BertTokenizer.from_pretrained(pretrained_model_dir)
+        encodes = tokenizer(items, key=lambda x: x['stem'])
+
+        t2v = BertModel(pretrained_model_dir)
+        output = t2v(encodes)
+        assert output.shape[2] == t2v.vector_size
+
+        t2v = T2V('bert', pretrained_model_dir)
+        output = t2v(encodes)
+        assert output.shape[-1] == t2v.vector_size
+        assert t2v.infer_vector(encodes).shape[1] == t2v.vector_size
+        assert t2v.infer_tokens(encodes).shape[2] == t2v.vector_size
+        t2v.infer_vector(encodes, pooling_strategy='CLS')
+        t2v.infer_vector(encodes, pooling_strategy='average')
+
+    def test_i2v(self, pretrained_model_dir):
+        items = [
+            {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer_kwargs = {
+            "tokenizer_config_dir": pretrained_model_dir
+        }
+        i2v = Bert('bert', 'bert', pretrained_model_dir, tokenizer_kwargs=tokenizer_kwargs)
+
+        i_vec, t_vec = i2v(items, key=lambda x: x['stem'])
+        assert len(i_vec[0]) == i2v.vector_size
+        assert len(t_vec[0][0]) == i2v.vector_size
+
+        i_vec = i2v.infer_item_vector(items, key=lambda x: x['stem'])
+        assert len(i_vec[0]) == i2v.vector_size
+        t_vec = i2v.infer_token_vector(items, key=lambda x: x['stem'])
+        assert len(t_vec[0][0]) == i2v.vector_size
+
+    #     output_dir = pretrained_model_dir
+    #     i2v = get_pretrained_i2v("luna_pub_bert_math_base", output_dir)
+    #     i_vec, t_vec = i2v(items, key=lambda x: x['stem'])
+    #     assert len(i_vec[0]) == i2v.vector_size
+    #     assert len(t_vec[0][0]) == i2v.vector_size
+
+    #     i_vec = i2v.infer_item_vector(items, key=lambda x: x['stem'])
+    #     assert len(i_vec[0]) == i2v.vector_size
+
+    #     t_vec = i2v.infer_token_vector(items, key=lambda x: x['stem'])
+    #     assert len(t_vec[0][0]) == i2v.vector_size
diff --git a/tests/test_pretrain/test_pretrained_disenqnet.py b/tests/test_pretrain/test_pretrained_disenqnet.py
new file mode 100644
index 00000000..41998568
--- /dev/null
+++ b/tests/test_pretrain/test_pretrained_disenqnet.py
@@ -0,0 +1,149 @@
+import os
+os.environ["CUDA_VISIBLE_DEVICES"] = ""
+
+import pytest
+import torch
+from EduNLP.ModelZoo.disenqnet import DisenQNet
+from EduNLP.Pretrain import DisenQTokenizer, train_disenqnet
+from EduNLP.Vector import T2V, DisenQModel
+from EduNLP.I2V import DisenQ, get_pretrained_i2v
+from conftest import TEST_GPU
+
+
+# TODO
+class TestPretrainDisenQNet:
+    def test_tokenizer(self, standard_luna_data, pretrained_tokenizer_dir):
+        pretrained_dir = pretrained_tokenizer_dir
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer = DisenQTokenizer()
+        tokenizer_size1 = len(tokenizer)
+        tokenizer.set_vocab(standard_luna_data, key=lambda x: x["ques_content"])
+        tokenizer_size2 = len(tokenizer)
+        assert tokenizer_size1 < tokenizer_size2
+        tokenizer.save_pretrained(pretrained_dir)
+        tokenizer = DisenQTokenizer.from_pretrained(pretrained_dir)
+        tokenizer_size3 = len(tokenizer)
+        assert tokenizer_size2 == tokenizer_size3
+
+        tokens = tokenizer.tokenize(test_items, key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], list)
+        tokens = tokenizer.tokenize(test_items[0], key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], str)
+
+        res = tokenizer(test_items, key=lambda x: x["ques_content"])
+        assert len(res["seq_idx"].shape) == 2
+        res = tokenizer(test_items[0], key=lambda x: x["ques_content"])
+        assert len(res["seq_idx"].shape) == 1
+        res = tokenizer(test_items, key=lambda x: x["ques_content"], return_tensors=False, return_text=True)
+        assert isinstance(res["seq_idx"], list)
+
+    def test_train_disenq(self, standard_luna_data, pretrained_model_dir):
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        train_disenqnet(
+            standard_luna_data,
+            pretrained_model_dir,
+            data_params={
+                "stem_key": "ques_content",
+                "data_formation": {
+                    "knowledge": "know_name"
+                }
+            },
+            train_params={
+                "num_train_epochs": 3,
+                "per_device_train_batch_size": 2,
+                "per_device_eval_batch_size": 2,
+                "no_cuda": not TEST_GPU,
+            }
+        )
+        # train with a pretrained model
+        train_disenqnet(
+            standard_luna_data,
+            pretrained_model_dir,
+            pretrained_dir=pretrained_model_dir,
+            eval_items=standard_luna_data,
+            data_params={
+                "stem_key": "ques_content",
+                "data_formation": {
+                    "knowledge": "know_name"
+                }
+            },
+            train_params={
+                "num_train_epochs": 1,
+                "per_device_train_batch_size": 1,
+                "per_device_eval_batch_size": 1,
+                "no_cuda": not TEST_GPU,
+                "gradient_accumulation_steps": 2
+            },
+            model_params={
+                "hidden_size": 300
+            },
+            w2v_params={
+                "min_count": 5
+            }
+        )
+        model = DisenQNet.from_pretrained(pretrained_model_dir)
+        tokenizer = DisenQTokenizer.from_pretrained(pretrained_model_dir)
+
+        # TODO: need to handle inference for T2V for batch or single
+        # encodes = tokenizer(test_items[0], lambda x: x['ques_content'])
+        # model(**encodes)
+        encodes = tokenizer(test_items, lambda x: x['ques_content'])
+        model(**encodes)
+
+    def test_disenq_t2v(self, pretrained_model_dir):
+        items = [
+            {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer = DisenQTokenizer.from_pretrained(pretrained_model_dir)
+
+        t2v = DisenQModel(pretrained_model_dir)
+        encodes = tokenizer(items, key=lambda x: x['stem'])
+        outputs = t2v(encodes)
+        assert len(outputs) == 3
+
+        t2v = T2V('disenq', pretrained_model_dir)
+        encodes = tokenizer(items, key=lambda x: x['stem'])
+        t_vec = t2v.infer_tokens(encodes, key=lambda x: x["stem"])
+        i_vec_k = t2v.infer_vector(encodes, key=lambda x: x["stem"], vector_type="k")
+        i_vec_i = t2v.infer_vector(encodes, key=lambda x: x["stem"], vector_type="i")
+        assert i_vec_k.shape[1] == t2v.vector_size
+        assert i_vec_i.shape[1] == t2v.vector_size
+        assert t_vec.shape[2] == t2v.vector_size
+
+    def test_disenq_i2v(self, pretrained_model_dir):
+        test_items = [
+            {"content": "10 米 的 (2/5) = 多少 米 的 (1/2),有 公 式"},
+            {"content": "10 米 的 (2/5) = 多少 米 的 (1/2),有 公 式 , 如 图 , 若 $x,y$ 满 足 约 束 条 件 公 式"},
+        ]
+
+        tokenizer_kwargs = {"tokenizer_config_dir": pretrained_model_dir}
+        i2v = DisenQ('disenq', 'disenq', pretrained_model_dir, tokenizer_kwargs=tokenizer_kwargs, pretrained_t2v=False)
+
+        t_vec = i2v.infer_token_vector(test_items, key=lambda x: x["content"])
+        i_vec_k = i2v.infer_item_vector(test_items, key=lambda x: x["content"], vector_type="k")
+        i_vec_i = i2v.infer_item_vector(test_items, key=lambda x: x["content"], vector_type="i")
+        assert i_vec_k.shape[1] == i2v.vector_size
+        assert i_vec_i.shape[1] == i2v.vector_size
+        assert t_vec.shape[2] == i2v.vector_size
+
+        i_vec, t_vec = i2v.infer_vector(test_items, key=lambda x: x["content"], vector_type=None)
+        assert len(i_vec) == 2
+        assert i_vec_k.shape[1] == i2v.vector_size
+        assert i_vec_i.shape[1] == i2v.vector_size
+        assert t_vec.shape[2] == i2v.vector_size
+
+        with pytest.raises(KeyError):
+            i_vec = i2v.infer_item_vector(test_items, key=lambda x: x["content"], vector_type="x")
diff --git a/tests/test_pretrain/test_pretrained_elmo.py b/tests/test_pretrain/test_pretrained_elmo.py
new file mode 100644
index 00000000..16ffb55e
--- /dev/null
+++ b/tests/test_pretrain/test_pretrained_elmo.py
@@ -0,0 +1,222 @@
+import os
+os.environ["CUDA_VISIBLE_DEVICES"] = ""
+
+import pytest
+import torch
+from EduNLP.ModelZoo.rnn import ElmoLM
+from EduNLP.Pretrain import ElmoTokenizer, train_elmo
+from EduNLP.Pretrain import train_elmo_for_property_prediction, train_elmo_for_knowledge_prediction
+from EduNLP.Vector import T2V, ElmoModel
+from EduNLP.I2V import Elmo, get_pretrained_i2v
+
+from conftest import TEST_GPU
+
+
+class TestPretrainEmlo:
+    def test_tokenizer(self, standard_luna_data, pretrained_tokenizer_dir):
+        pretrained_dir = pretrained_tokenizer_dir
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer = ElmoTokenizer(tokenize_method="pure_text")
+        tokenizer_size1 = len(tokenizer)
+        tokenizer.set_vocab(standard_luna_data, key=lambda x: x["ques_content"])
+        tokenizer_size2 = len(tokenizer)
+        assert tokenizer_size1 < tokenizer_size2
+        tokenizer.save_pretrained(pretrained_dir)
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_dir)
+        tokenizer_size3 = len(tokenizer)
+        assert tokenizer_size2 == tokenizer_size3
+
+        tokens = tokenizer.tokenize(test_items, key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], list)
+        tokens = tokenizer.tokenize(test_items[0], key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], str)
+
+        res = tokenizer(test_items, key=lambda x: x["ques_content"])
+        assert len(res["seq_idx"].shape) == 2
+        res = tokenizer(test_items[0], key=lambda x: x["ques_content"])
+        assert len(res["seq_idx"].shape) == 1
+        res = tokenizer(test_items, key=lambda x: x["ques_content"], return_tensors=False, return_text=True)
+        assert isinstance(res["seq_idx"], list)
+
+    def test_train_elmo(self, standard_luna_data, pretrained_model_dir):
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        train_elmo(
+            standard_luna_data,
+            pretrained_model_dir,
+            data_params={
+                "stem_key": "ques_content"
+            },
+            train_params={
+                "num_train_epochs": 3,
+                "per_device_train_batch_size": 2,
+                "per_device_eval_batch_size": 2,
+                "no_cuda": not TEST_GPU,
+            }
+        )
+
+        # train with a pretrained model
+        str_items = [item["ques_content"] for item in standard_luna_data]
+        train_elmo(
+            str_items,
+            pretrained_model_dir,
+            pretrained_dir=pretrained_model_dir,
+            data_params={
+                "stem_key": None
+            },
+            train_params={
+                "num_train_epochs": 1,
+                "per_device_train_batch_size": 2,
+                "per_device_eval_batch_size": 2,
+                "no_cuda": not TEST_GPU,
+            }
+        )
+        model = ElmoLM.from_pretrained(pretrained_model_dir)
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_model_dir)
+        model.save_pretrained(f"{pretrained_model_dir}/save")
+        tokenizer.save_pretrained(f"{pretrained_model_dir}/save")
+        # TODO: need to handle inference for T2V for batch or single
+        # encodes = tokenizer(test_items[0], lambda x: x['ques_content'])
+        # model(**encodes)
+        encodes = tokenizer(test_items, lambda x: x['ques_content'])
+        model(**encodes)
+
+    def test_train_pp(self, standard_luna_data, pretrained_model_dir, pretrained_pp_dir):
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        data_params = {
+            "stem_key": "ques_content",
+            "label_key": "difficulty"
+        }
+        train_params = {
+            "num_train_epochs": 1,
+            "per_device_train_batch_size": 2,
+            "per_device_eval_batch_size": 2,
+            "no_cuda": not TEST_GPU,
+        }
+        # train without a pretrained model
+        train_elmo_for_property_prediction(
+            standard_luna_data,
+            pretrained_pp_dir,
+            train_params=train_params,
+            data_params=data_params
+        )
+        # train with a pretrained model
+        train_elmo_for_property_prediction(
+            standard_luna_data,
+            pretrained_pp_dir,
+            pretrained_dir=pretrained_model_dir,
+
+            eval_items=standard_luna_data,
+            train_params=train_params,
+            data_params=data_params,
+        )
+        model = ElmoLM.from_pretrained(pretrained_pp_dir)
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_pp_dir)
+
+        # TODO: need to handle inference for T2V for batch or single
+        # encodes = tokenizer(test_items[0], lambda x: x['ques_content'])
+        # model(**encodes)
+        encodes = tokenizer(test_items, lambda x: x['ques_content'])
+        model(**encodes)
+
+    def test_train_kp(self, standard_luna_data, pretrained_model_dir, pretrained_kp_dir):
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        # train_items = standard_luna_data
+        data_params = {
+            "stem_key": "ques_content",
+            "label_key": "know_list"
+        }
+        train_params = {
+            "num_train_epochs": 1,
+            "per_device_train_batch_size": 2,
+            "per_device_eval_batch_size": 2,
+            "no_cuda": not TEST_GPU,
+        }
+        model_params = {
+            "num_classes_list": [10, 27, 963],
+            "num_total_classes": 1000,
+        }
+        # train without pretrained model
+        train_elmo_for_knowledge_prediction(
+            standard_luna_data,
+            pretrained_kp_dir,
+            train_params=train_params,
+            data_params=data_params,
+            model_params=model_params
+        )
+        # train with pretrained model
+        train_elmo_for_knowledge_prediction(
+            standard_luna_data,
+            pretrained_kp_dir,
+            pretrained_dir=pretrained_model_dir,
+
+            eval_items=standard_luna_data,
+            train_params=train_params,
+            data_params=data_params,
+            model_params=model_params,
+        )
+        model = ElmoLM.from_pretrained(pretrained_kp_dir)
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_kp_dir)
+        # TODO: need to handle inference for T2V for batch or single
+        # encodes = tokenizer(test_items[0], lambda x: x['ques_content'])
+        # model(**encodes)
+        encodes = tokenizer(test_items, lambda x: x['ques_content'])
+        model(**encodes)
+
+    def test_elmo_t2v(self, pretrained_model_dir):
+        items = [
+            {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer = ElmoTokenizer.from_pretrained(pretrained_model_dir)
+
+        t2v = ElmoModel(pretrained_model_dir)
+        encodes = tokenizer(items, key=lambda x: x['stem'])
+        output = t2v(encodes)
+        assert output.shape[1] == t2v.vector_size
+
+        t2v = T2V('elmo', pretrained_model_dir)
+        encodes = tokenizer(items, key=lambda x: x['stem'])
+        output = t2v(encodes)
+        assert output.shape[-1] == t2v.vector_size
+        assert t2v.infer_vector(encodes).shape[1] == t2v.vector_size
+        assert t2v.infer_tokens(encodes).shape[2] == t2v.vector_size
+
+    def test_elmo_i2v(self, pretrained_model_dir):
+        items = [
+            {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        tokenizer_kwargs = {"tokenizer_config_dir": pretrained_model_dir}
+        i2v = Elmo('elmo', 'elmo', pretrained_model_dir, tokenizer_kwargs=tokenizer_kwargs, pretrained_t2v=False)
+
+        i_vec, t_vec = i2v(items, key=lambda x: x["stem"])
+        assert len(i_vec[0]) == i2v.vector_size
+        assert len(t_vec[0][0]) == i2v.vector_size
+        i_vec = i2v.infer_item_vector(items, key=lambda x: x['stem'])
+        assert len(i_vec[0]) == i2v.vector_size
+        t_vec = i2v.infer_token_vector(items, key=lambda x: x['stem'])
+        assert len(t_vec[0][0]) == i2v.vector_size
diff --git a/tests/test_pretrain/test_pretrained_quesnet.py b/tests/test_pretrain/test_pretrained_quesnet.py
new file mode 100644
index 00000000..f1ca3323
--- /dev/null
+++ b/tests/test_pretrain/test_pretrained_quesnet.py
@@ -0,0 +1,162 @@
+from lib2to3.pgen2 import token
+import os
+
+from bson import encode
+os.environ["CUDA_VISIBLE_DEVICES"] = ""
+
+import pytest
+import torch
+from EduNLP.ModelZoo.quesnet import QuesNet
+from EduNLP.Pretrain import QuesNetTokenizer, Question, pretrain_quesnet
+# from EduNLP.Pretrain import train_quesnet_for_property_prediction, train_quesnet_for_knowledge_prediction
+from EduNLP.Vector import T2V
+from EduNLP.Vector.quesnet import QuesNetModel
+from EduNLP.I2V import QuesNet as QuesNetI2V, get_pretrained_i2v
+from EduNLP.utils import abs_current_dir, path_append
+
+from conftest import TEST_GPU
+
+
+class TestPretrainQuesNet:
+    def test_tokenizer(self, standard_luna_data, pretrained_tokenizer_dir):
+        pretrained_dir = pretrained_tokenizer_dir
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        img_dir = path_append(abs_current_dir(__file__), "test_data/quesnet_img", to_str=True)
+        tokenizer = QuesNetTokenizer(max_length=10, img_dir=img_dir, add_specials=[])
+
+        # set_vocab
+        tokenizer_size1 = len(tokenizer)
+        tokenizer.set_vocab(standard_luna_data, key=lambda x: x["ques_content"])
+        tokenizer.set_meta_vocab(standard_luna_data)
+        with pytest.raises(Exception):
+            tokenizer.set_meta_vocab([{"ques_content": "已知", "know_name": 1}])
+        tokenizer.set_img_dir(None)
+
+        # save and load
+        tokenizer_size2 = len(tokenizer)
+        assert tokenizer_size1 < tokenizer_size2
+        tokenizer.save_pretrained(pretrained_dir)
+        tokenizer = QuesNetTokenizer.from_pretrained(pretrained_dir)
+        tokenizer.load_meta_vocab('wrong_path')
+        tokenizer.load_meta_vocab(tokenizer.meta_vocab_dir)
+        tokenizer_size3 = len(tokenizer)
+        assert tokenizer_size2 == tokenizer_size3
+
+        # tokenize
+        tokens = tokenizer.tokenize(test_items, key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], list)
+        tokens = tokenizer.tokenize(test_items[0], key=lambda x: x["ques_content"])
+        assert isinstance(tokens[0], str)
+        tokenizer.tokenize({"ques_content": "已知"}, key=lambda x: x['ques_content'])
+        tokenizer.tokenize({"ques_content": ""}, key=lambda x: x['ques_content'])
+        tokenizer.tokenize(test_items[:2], key=lambda x: x['ques_content'])
+
+        # call
+        res = tokenizer(test_items, key=lambda x: x["ques_content"])
+        assert len(res["seq_idx"]) == 2
+        res = tokenizer(test_items[0], key=lambda x: x["ques_content"])
+        assert len(res["seq_idx"]) == 10
+        ret = tokenizer({"ques_content": "已知", "know_name": ['立体几何', '空间几何体']},
+                        key=lambda x: x['ques_content'], return_text=True, padding=True)
+        assert 'seq_token' in ret
+        assert 'meta' in ret
+        with pytest.raises(Exception):
+            tokenizer({"ques_content": "已知", "know_name": 3}, key=lambda x: x['ques_content'])
+
+    def test_train_quesnet(self, standard_luna_data, pretrained_model_dir):
+        test_items = [
+            {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+                    如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$,\
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
+            {'ques_content': '如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$, \
+                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+
+        ques_file = path_append(abs_current_dir(__file__),
+                                "../../static/test_data/standard_luna_data.json", to_str=True)
+        img_dir = path_append(abs_current_dir(__file__),
+                              "../../static/test_data/quesnet_img", to_str=True)
+        pretrain_quesnet(
+            ques_file,
+            pretrained_model_dir,
+            img_dir=img_dir,
+            save_embs=True,
+            # data_params={
+            #     "stem_key": "ques_content"
+            # },
+            train_params={
+                # "num_train_epochs": 3,
+                # "per_device_train_batch_size": 2,
+                # "per_device_eval_batch_size": 2,
+                # "no_cuda": not TEST_GPU,
+                'max_steps': 2,
+                'feat_size': 256,
+                'save_every': 1,
+                'emb_size': 256,
+                'device': "cpu"
+            }
+        )
+
+        tokenizer = QuesNetTokenizer.from_pretrained(pretrained_model_dir, img_dir=img_dir)
+        model = QuesNet.from_pretrained(pretrained_model_dir)
+        # TODO: need to handle inference for T2V for batch or single
+        # encodes = tokenizer(test_items[0], lambda x: x['ques_content'])
+        # model(**encodes)
+        encodes = tokenizer(test_items, lambda x: x['ques_content'])
+        qs = [Question("", encodes['seq_idx'][i],
+                       [0], [[0], [0], [0]], encodes['meta_idx'][i]) for i in range(len(encodes))]
+        # content = encodes['seq_idx']
+        # meta_idx = encodes['meta_idx']
+        # qs = [Question("", content[i], [0], [[0], [0], [0]], meta_idx[i]) for i in range(len(encodes))]
+        batch = model.make_batch(qs, device="cpu")
+        out = model(batch)
+        print(out.embeded.shape)
+
+    def test_quesnet_t2v(self, pretrained_model_dir):
+        items = [
+            {'ques_content': '如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        img_dir = path_append(abs_current_dir(__file__),
+                              "../../static/test_data/quesnet_img", to_str=True)
+        tokenizer = QuesNetTokenizer.from_pretrained(pretrained_model_dir, img_dir=img_dir)
+        t2v = QuesNetModel(pretrained_model_dir)
+
+        encodes = tokenizer(items, key=lambda x: x['ques_content'])
+        output = t2v(encodes)
+        assert len(output) == 2
+
+        t2v = T2V('quesnet', pretrained_model_dir)
+        encodes = tokenizer(items, key=lambda x: x['ques_content'])
+        output_i = t2v(encodes)
+        assert output_i.shape[1] == t2v.vector_size
+        assert t2v.infer_vector(encodes).shape[1] == t2v.vector_size
+        assert t2v.infer_tokens(encodes).shape[2] == t2v.vector_size
+
+    def test_quesnet_i2v(self, pretrained_model_dir):
+        items = [
+            {'ques_content': '如图$\\FigureID{000004d6-0479-11ec-829b-797d5eb43535}$, \
+                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
+        ]
+        img_dir = path_append(abs_current_dir(__file__),
+                              "../../static/test_data/quesnet_img", to_str=True)
+        tokenizer_kwargs = {
+            "tokenizer_config_dir": pretrained_model_dir,
+            "img_dir": img_dir
+        }
+        i2v = QuesNetI2V('quesnet', 'quesnet', pretrained_model_dir, tokenizer_kwargs=tokenizer_kwargs,
+                         pretrained_t2v=False)
+
+        i_vec, t_vec = i2v(items, key=lambda x: x["ques_content"])
+        assert len(i_vec[0]) == i2v.vector_size
+        assert len(t_vec[0][0]) == i2v.vector_size
+        i_vec = i2v.infer_item_vector(items, key=lambda x: x['ques_content'])
+        assert len(i_vec[0]) == i2v.vector_size
+        t_vec = i2v.infer_token_vector(items, key=lambda x: x['ques_content'])
+        assert len(t_vec[0][0]) == i2v.vector_size
diff --git a/tests/test_tokenizer/test_tokenizer.py b/tests/test_tokenizer/test_tokenizer.py
index aec81dd2..1ab479dd 100644
--- a/tests/test_tokenizer/test_tokenizer.py
+++ b/tests/test_tokenizer/test_tokenizer.py
@@ -12,9 +12,9 @@ def test_tokenizer():
 
 
 def test_disenQTokenizer():
-    tokenizer = DisenQTokenizer(max_length=10)
-    with pytest.raises(RuntimeError):
-        tokenizer("10 米 的 (2/5) = () 米 的 (1/2) .")
+    tokenizer = DisenQTokenizer(max_length=10, tokenize_method="space")
+    # with pytest.raises(RuntimeError):
+    #     tokenizer("10 米 的 (2/5) = () 米 的 (1/2) .")
 
     test_items = [
         "10 米 的 (2/5) = () 米 的 (1/2) . 多 余 的 字",
@@ -22,13 +22,91 @@ def test_disenQTokenizer():
         "5 % 2 + 3.14",
         "3.x",
         ".",
-        ""
+        "",
+        "-1/2",
+        "/",
+        "1.2%",
     ]
-    tokenizer.set_vocab(test_items, silent=False)
+    tokenizer.set_vocab(test_items)
     print(tokenizer.vocab_size)
     for item in test_items:
         token_item = tokenizer(item)
         print(token_item)
 
     test_item = tokenizer(test_items[0], padding=True)
-    assert test_item["content_idx"].shape[-1] == 10
+    assert test_item["seq_idx"].shape[-1] == 10
+
+
+def test_CharTokenizer():
+    items = [{
+        "stem": "文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？",
+        "options": ["1", "2"]
+    }]
+    tokenizer = get_tokenizer("char", stop_words=set("，？"))
+    tokens = tokenizer(items, key=lambda x: x['stem'])
+    ret = next(tokens)
+    ans = ['文', '具', '店', '有', '$', '600', '$', '本', '练', '习', '本', '卖', '出', '一',
+           '些', '后', '还', '剩', '$', '4', '$', '包', '每', '包', '$', '25', '$', '本', '卖', '出', '多', '少', '本']
+    assert ret == ans
+
+
+def test_SpaceTokenizer():
+    items = ['文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？']
+    tokenizer = get_tokenizer("space", stop_words=[])
+    tokens = tokenizer(items)
+    ret = next(tokens)
+    ans = ['文具店有', '$600$', '本练习本，卖出一些后，还剩', '$4$', '包，每包', '$25$', '本，卖出多少本？']
+    assert ret == ans
+
+
+def test_AstformulaTokenizer():
+    items = ['文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？']
+    tokenizer = get_tokenizer("ast_formula")
+    tokens = tokenizer(items)
+    ret = next(tokens)
+    ans = ['文具店', 'textord', 'textord', 'textord', '练习本', '卖出', '剩', 'textord', '包', '每包', 'textord', 'textord', '卖出']
+    assert ret == ans
+
+
+def test_PuretextTokenizer():
+    items = ['文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？']
+    tokenizer = get_tokenizer("pure_text", stop_words=[])
+    tokens = tokenizer(items)
+    ret = next(tokens)
+    ans = ['文具店', '600', '练习本', '卖出', '剩', '4', '包', '每包', '25', '卖出']
+    assert ret == ans
+    tokenizer = get_tokenizer("pure_text", stop_words=[], handle_figure_formula=None)
+    tokens = tokenizer(items)
+    ret = next(tokens)
+    assert ret == ans
+    tokenizer = get_tokenizer("pure_text", stop_words=[], handle_figure_formula='symbolize')
+    tokens = tokenizer(items)
+    ret = next(tokens)
+    assert ret == ans
+    with pytest.raises(ValueError):
+        tokenizer = get_tokenizer("pure_text", stop_words=[], handle_figure_formula='wrong')
+
+
+def test_CustomTokenizer():
+    items = [{
+        "stem": "文具店有 $600$ 本练习本，卖出一些后，还剩 $4$ 包，每包 $25$ 本，卖出多少本？",
+        "options": ["1", "2"]
+    }]
+    tokenizer = get_tokenizer("custom", symbol='f')
+    tokens = tokenizer(items, key=lambda x: x['stem'])
+    ret = next(tokens)
+    ans = ['文具店', '[FORMULA]', '练习本', '卖出', '剩', '[FORMULA]', '包', '每包', '[FORMULA]', '卖出']
+    assert ret == ans
+    items = [{
+        "stem": "有公式$\\FormFigureID{1}$，如图$\\FigureID{088f15ea-xxx}$,若$x,y$满足约束条件公式$\\F\
+            ormFigureBase64{2}$,$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$",
+        "options": ["1", "2"]
+    }]
+    tokenizer = get_tokenizer("custom", symbol='f', handle_figure_formula="symbolize")
+    tokens = tokenizer(items, key=lambda x: x['stem'])
+    ret = next(tokens)
+    ret.pop(3)
+    ans = ['公式', '[FORMULA]', '如图', '\\FigureID{088f15ea-xxx}', '[FORMULA]', '约束条件', '公式', '[FORMULA]',
+           '\\SIFSep', '[FORMULA]', '最大值', '\\SIFBlank']
+    ans.pop(3)
+    assert ret == ans
diff --git a/tests/test_vec/conftest.py b/tests/test_vec/conftest.py
index 4cdb9198..7f47d806 100644
--- a/tests/test_vec/conftest.py
+++ b/tests/test_vec/conftest.py
@@ -10,37 +10,7 @@
 @pytest.fixture(scope="module")
 def data():
     _data = []
-    data_path = path_append(abs_current_dir(__file__), "../../static/test_data/OpenLUNA.json", to_str=True)
-    with codecs.open(data_path, encoding="utf-8") as f:
-        for line in f.readlines():
-            _data.append(json.loads(line))
-    return _data
-
-
-@pytest.fixture(scope="module")
-def disen_train_data():
-    _data = []
-    data_path = path_append(abs_current_dir(__file__), "../../static/test_data/disenq_train.json", to_str=True)
-    with codecs.open(data_path, encoding="utf-8") as f:
-        for line in f.readlines():
-            _data.append(json.loads(line))
-    return _data
-
-
-@pytest.fixture(scope="module")
-def disen_test_data():
-    _data = []
-    data_path = path_append(abs_current_dir(__file__), "../../static/test_data/disenq_test.json", to_str=True)
-    with codecs.open(data_path, encoding="utf-8") as f:
-        for line in f.readlines():
-            _data.append(json.loads(line))
-    return _data
-
-
-@pytest.fixture(scope="module")
-def quesnet_data():
-    _data = []
-    data_path = path_append(abs_current_dir(__file__), "../../static/test_data/quesnet_data.json", to_str=True)
+    data_path = path_append(abs_current_dir(__file__), "../../static/test_data/standard_luna_data.json", to_str=True)
     with codecs.open(data_path, encoding="utf-8") as f:
         for line in f.readlines():
             _data.append(json.loads(line))
diff --git a/tests/test_vec/test_bert.py b/tests/test_vec/test_bert.py
deleted file mode 100644
index f3e37034..00000000
--- a/tests/test_vec/test_bert.py
+++ /dev/null
@@ -1,99 +0,0 @@
-import torch
-import numpy as np
-import pytest
-from EduNLP.Pretrain import BertTokenizer, finetune_bert
-from EduNLP.Vector import BertModel, T2V
-from EduNLP.I2V import Bert, get_pretrained_i2v
-
-
-@pytest.fixture(scope="module")
-def stem_data_bert(data):
-    test_items = [
-        {'stem': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
-            如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
-        {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-            若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    ]
-    data = test_items + data
-    _data = []
-    tokenizer = BertTokenizer()
-    for e in data[:10]:
-        d = tokenizer(e["stem"])
-        if d is not None:
-            _data.append(d)
-    assert _data
-    return _data
-
-
-def test_bert_without_param(stem_data_bert, tmpdir):
-    output_dir = str(tmpdir.mkdir('finetuneBert'))
-    finetune_bert(
-        stem_data_bert,
-        output_dir
-    )
-    tokenizer = BertTokenizer.from_pretrained(output_dir)
-    model = BertModel(output_dir)
-    item = {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-            若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    inputs = tokenizer(item['stem'], return_tensors='pt')
-    output = model(inputs)
-    assert model.vector_size > 0
-    assert output.shape[-1] == model.vector_size
-    t2v = T2V('bert', output_dir)
-    assert t2v(inputs).shape[-1] == t2v.vector_size
-    assert t2v.infer_vector(inputs).shape == (1, t2v.vector_size)
-    assert t2v.infer_vector(inputs, pooling_strategy='average').shape == (1, t2v.vector_size)
-    assert t2v.infer_tokens(inputs).shape[-1] == t2v.vector_size
-
-
-def test_bert_i2v(stem_data_bert, tmpdir):
-    output_dir = str(tmpdir.mkdir('finetuneBert'))
-    train_params = {
-        'epochs': 1,
-        'save_steps': 100,
-        'batch_size': 8,
-        'logging_steps': 3
-    }
-    finetune_bert(
-        stem_data_bert,
-        output_dir,
-        train_params=train_params
-    )
-
-    item = {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-            若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    tokenizer_kwargs = {"tokenizer_config_dir": output_dir}
-    i2v = Bert('bert', 'bert', output_dir, tokenizer_kwargs=tokenizer_kwargs)
-    i_vec, t_vec = i2v([item['stem'], item['stem']])
-    assert len(i_vec[0]) == i2v.vector_size
-    assert len(t_vec[0][0]) == i2v.vector_size
-
-    i_vec = i2v.infer_item_vector([item['stem'], item['stem']])
-    assert len(i_vec[0]) == i2v.vector_size
-
-    t_vec = i2v.infer_token_vector([item['stem'], item['stem']])
-    assert len(t_vec[0][0]) == i2v.vector_size
-
-
-# def test_luna_pub_bert(stem_data_bert, tmpdir):
-#     output_dir = str(tmpdir.mkdir('bert_test'))
-#     i2v = get_pretrained_i2v("luna_pub_bert_math_base", output_dir)
-#     item = {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-#                         若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-#     i_vec, t_vec = i2v([item['stem'], item['stem']])
-#     assert len(i_vec[0]) == i2v.vector_size
-#     assert len(t_vec[0][0]) == i2v.vector_size
-
-#     i_vec = i2v.infer_item_vector([item['stem'], item['stem']])
-#     assert len(i_vec[0]) == i2v.vector_size
-
-#     t_vec = i2v.infer_token_vector([item['stem'], item['stem']])
-#     assert len(t_vec[0][0]) == i2v.vector_size
-
-
-def test_bert_tokenizer(stem_data_bert, tmpdir):
-    output_dir = str(tmpdir.mkdir('test_bert_tokenizer'))
-    tokenizer = BertTokenizer(add_special_tokens=True, text_tokenizer='pure_text')
-    tokenizer.save_pretrained(output_dir)
-    tokenizer = BertTokenizer.from_pretrained(output_dir)
-    tokenizer = BertTokenizer.from_pretrained('bert-base-chinese')
diff --git a/tests/test_vec/test_disenQNet.py b/tests/test_vec/test_disenQNet.py
deleted file mode 100644
index c752c52a..00000000
--- a/tests/test_vec/test_disenQNet.py
+++ /dev/null
@@ -1,120 +0,0 @@
-import torch
-import numpy as np
-import pytest
-import os
-from EduNLP.Pretrain import DisenQTokenizer, train_disenqnet
-from EduNLP.Vector import DisenQModel, T2V
-from EduNLP.I2V import DisenQ, get_pretrained_i2v
-import warnings
-from copy import deepcopy
-
-
-def test_dataset(disen_train_data, disen_test_data, tmpdir):
-    output_dir = str(tmpdir.mkdir('disenq_dataset'))
-    tokenizer = DisenQTokenizer(max_length=250, tokenize_method="space")
-    train_params = {
-        'epoch': 2,
-        'batch': 1,
-        'trim_min': 1,
-    }
-    data_formation = {
-        "content": "content",
-        "knowledge": "knowledge"
-    }
-    train_disenqnet(
-        deepcopy(disen_train_data[:100]),
-        tokenizer,
-        output_dir,
-        output_dir,
-        train_params=train_params,
-        test_items=disen_test_data[:100],
-        data_formation=data_formation
-    )
-    # for test Datasets
-    os.remove(os.path.join(output_dir, "vocab.list"))
-    with pytest.warns(UserWarning):
-        train_disenqnet(
-            deepcopy(disen_train_data[:100]),
-            tokenizer,
-            output_dir,
-            output_dir,
-            train_params=train_params,
-            test_items=None,
-        )
-
-
-def test_disen_train(disen_train_data, disen_test_data, tmpdir):
-    output_dir = str(tmpdir.mkdir('disenq'))
-    tokenizer = DisenQTokenizer(max_length=250, tokenize_method="space")
-    train_params = {
-        'epoch': 2,
-        'batch': 16,
-        'trim_min': 5,
-    }
-
-    train_disenqnet(
-        disen_train_data[-100:],
-        tokenizer,
-        output_dir,
-        output_dir,
-        train_params=train_params,
-        test_items=disen_test_data[-100:],
-    )
-
-    pretrained_dir = output_dir
-    tokenizer_kwargs = {
-        "tokenizer_config_dir": pretrained_dir,
-    }
-    i2v = DisenQ('disenq', 'disenq', pretrained_dir, tokenizer_kwargs=tokenizer_kwargs, device="cpu")
-
-    test_items = [
-        {"content": "10 米 的 (2/5) = 多少 米 的 (1/2),有 公 式"},
-        {"content": "10 米 的 (2/5) = 多少 米 的 (1/2),有 公 式 , 如 图 , 若 $x,y$ 满 足 约 束 条 件 公 式"},
-    ]
-
-    t_vec = i2v.infer_token_vector(test_items[0], key=lambda x: x["content"])
-    i_vec_k = i2v.infer_item_vector(test_items[0], key=lambda x: x["content"], vector_type="k")
-    i_vec_i = i2v.infer_item_vector(test_items[0], key=lambda x: x["content"], vector_type="i")
-    assert i_vec_k.shape == torch.Size([1, 128])
-    assert i_vec_i.shape == torch.Size([1, 128])
-    assert t_vec.shape == torch.Size([1, 11, 128])
-    assert i2v.vector_size == i_vec_k.shape[1]
-
-    i_vec, t_vec = i2v.infer_vector(test_items[0], key=lambda x: x["content"], vector_type=None)
-    assert len(i_vec) == 2
-    assert i_vec[0].shape == torch.Size([1, 128])
-    assert i_vec[1].shape == torch.Size([1, 128])
-    assert t_vec.shape == torch.Size([1, 11, 128])
-
-    with pytest.raises(KeyError):
-        i_vec = i2v.infer_item_vector(test_items[0], key=lambda x: x["content"], vector_type="x")
-
-
-def test_disen_i2v(tmpdir):
-    test_items = [
-        {"content": "10 米 的 (2/5) = 多少 米 的 (1/2),有 公 式"},
-        {"content": "10 米 的 (2/5) = 多少 米 的 (1/2),有 公 式 , 如 图 , 若 $x,y$ 满 足 约 束 条 件 公 式"},
-    ]
-
-    pretrained_dir = str(tmpdir.mkdir('pretrained'))
-    i2v = get_pretrained_i2v("disenq_test_128", model_dir=pretrained_dir)
-    i_vec, t_vec = i2v(test_items[0], key=lambda x: x["content"])
-    assert len(i_vec) == 2
-    assert t_vec.shape[2] == i2v.vector_size
-
-    t_vec = i2v.infer_token_vector(test_items[0], key=lambda x: x["content"])
-    i_vec_k = i2v.infer_item_vector(test_items[0], key=lambda x: x["content"], vector_type="k")
-    i_vec_i = i2v.infer_item_vector(test_items[0], key=lambda x: x["content"], vector_type="i")
-    assert i_vec_k.shape == torch.Size([1, 128])
-    assert i_vec_i.shape == torch.Size([1, 128])
-    assert t_vec.shape == torch.Size([1, 11, 128])
-    assert i2v.vector_size == i_vec_k.shape[1]
-
-    i_vec, t_vec = i2v.infer_vector(test_items[0], key=lambda x: x["content"], vector_type=None)
-    assert len(i_vec) == 2
-    assert i_vec[0].shape == torch.Size([1, 128])
-    assert i_vec[1].shape == torch.Size([1, 128])
-    assert t_vec.shape == torch.Size([1, 11, 128])
-
-    i_vec, t_vec = i2v(test_items, key=lambda x: x["content"])
-    assert t_vec.shape == torch.Size([2, 23, 128])
diff --git a/tests/test_vec/test_elmo.py b/tests/test_vec/test_elmo.py
deleted file mode 100644
index 451a52c2..00000000
--- a/tests/test_vec/test_elmo.py
+++ /dev/null
@@ -1,77 +0,0 @@
-import torch
-import numpy as np
-import pytest
-import os
-from EduNLP.Pretrain import ElmoTokenizer, ElmoDataset, train_elmo
-from EduNLP.Vector import ElmoModel, T2V
-from EduNLP.I2V import Elmo, get_pretrained_i2v
-
-
-@pytest.fixture(scope="module")
-def stem_data_elmo(data):
-    test_items = [
-        {'stem': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
-                如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,\
-                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
-        {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    ]
-    data = test_items + data
-    _data = []
-    for e in data[:10]:
-        _data.append(e['stem'])
-    assert _data
-    return _data
-
-
-def test_elmo_without_param(stem_data_elmo, tmpdir):
-    output_dir = str(tmpdir.mkdir('elmo_test'))
-    tokenizer = ElmoTokenizer()
-    train_text = [tokenizer.tokenize(item=data, freeze_vocab=False) for data in stem_data_elmo]
-    train_elmo(train_text, output_dir)
-    model = ElmoModel(output_dir)
-    item = {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    inputs, length = tokenizer(item=item['stem'], freeze_vocab=True, pad_to_max_length=False)
-    output = model(inputs)
-    assert model.vector_size > 0
-    assert output.shape[-1] == model.vector_size
-    t2v = T2V('elmo', output_dir)
-    assert t2v(inputs).shape[-1] == t2v.vector_size
-    assert t2v.infer_vector(inputs).shape[-1] == t2v.vector_size
-
-
-def test_elmo_i2v(stem_data_elmo, tmpdir):
-    output_dir = str(tmpdir.mkdir('elmo_test'))
-    tokenizer = ElmoTokenizer()
-    train_text = [tokenizer.tokenize(item=data, freeze_vocab=False) for data in stem_data_elmo]
-    train_elmo(train_text, output_dir)
-    tokenizer_kwargs = {"path": os.path.join(output_dir, "vocab.json")}
-    i2v = Elmo('elmo', 'elmo', output_dir, tokenizer_kwargs=tokenizer_kwargs, pretrained_t2v=False)
-    item = {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-                若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    i_vec, t_vec = i2v(item['stem'])
-    assert len(i_vec) == i2v.vector_size
-    assert len(t_vec[0]) == i2v.vector_size
-    i_vec = i2v.infer_item_vector(item['stem'])
-    assert len(i_vec) == i2v.vector_size
-    t_vec = i2v.infer_token_vector(item['stem'])
-    assert len(t_vec[0]) == i2v.vector_size
-
-    i_vec, t_vec = i2v([item['stem'], item['stem'], item['stem']])
-    assert len(i_vec[0]) == i2v.vector_size
-    assert len(t_vec[0][0]) == i2v.vector_size
-
-
-def test_pretrained_elmo_i2v(stem_data_elmo, tmpdir):
-    output_dir = str(tmpdir.mkdir('elmo_test'))
-    i2v = get_pretrained_i2v("elmo_test", output_dir)
-    item = {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
-                    若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
-    i_vec, t_vec = i2v(item['stem'])
-    assert len(i_vec) == i2v.vector_size
-    assert len(t_vec[0]) == i2v.vector_size
-    i_vec = i2v.infer_item_vector(item['stem'])
-    assert len(i_vec) == i2v.vector_size
-    t_vec = i2v.infer_token_vector(item['stem'])
-    assert len(t_vec[0]) == i2v.vector_size
diff --git a/tests/test_vec/test_quesnet.py b/tests/test_vec/test_quesnet.py
deleted file mode 100644
index a2f86691..00000000
--- a/tests/test_vec/test_quesnet.py
+++ /dev/null
@@ -1,104 +0,0 @@
-import pytest
-import torch
-from EduNLP.Pretrain import QuesNetTokenizer, pretrain_quesnet
-from EduNLP.I2V import QuesNet
-from EduNLP.utils import abs_current_dir, path_append
-from EduNLP.ModelZoo.quesnet import QuesNet as _QuesNet, ImageAE, MetaAE
-import numpy as np
-import os
-
-
-def test_quesnet_tokenizer(quesnet_data, tmpdir):
-    tokenizer = QuesNetTokenizer(meta=['know_name'], max_length=10,
-                                 img_dir=path_append(abs_current_dir(__file__),
-                                                     "test_data/quesnet_img", to_str=True))
-    with pytest.raises(Exception):
-        tokenizer.tokenize(quesnet_data[0], key=lambda x: x['ques_content'])
-
-    # set_vocab
-    tokenizer.set_vocab([{"ques_content": "已知", "know_name": ['立体几何', '空间几何体']}],
-                        key=lambda x: x['ques_content'], trim_min_count=1)
-    with pytest.raises(Exception):
-        tokenizer.set_vocab([{"ques_content": "已知", "know_name": 1}],
-                            key=lambda x: x['ques_content'], trim_min_count=1)
-
-    tokenizer.set_vocab(quesnet_data[:100], key=lambda x: x['ques_content'],
-                        trim_min_count=2, silent=False)
-
-    # vocab_size, set_img_dir
-    assert isinstance(tokenizer.vocab_size, int)
-    tokenizer.set_img_dir(None)
-
-    # tokenize
-    tokenizer.tokenize({"ques_content": "已知"}, key=lambda x: x['ques_content'])
-    tokenizer.tokenize({"ques_content": ""}, key=lambda x: x['ques_content'])
-    tokenizer.tokenize(quesnet_data[:2], key=lambda x: x['ques_content'])
-
-    # __call__
-    ret = tokenizer({"ques_content": "已知", "know_name": ['立体几何', '空间几何体']},
-                    key=lambda x: x['ques_content'], return_text=True, padding=True)
-    assert 'content' in ret
-    assert 'meta' in ret
-    with pytest.raises(Exception):
-        tokenizer({"ques_content": "已知", "know_name": 3}, key=lambda x: x['ques_content'])
-
-
-def test_quesnet_pretrain(quesnet_data, tmpdir):
-    output_dir = str(tmpdir.mkdir('quesnet'))
-
-    tokenizer = QuesNetTokenizer(meta=['know_name'],
-                                 img_dir=path_append(abs_current_dir(__file__),
-                                                     "../../static/test_data/quesnet_img",
-                                                     to_str=True))
-
-    tokenizer.set_vocab(quesnet_data, key=lambda x: x['ques_content'],
-                        trim_min_count=2, silent=False)
-    tokenizer.save_pretrained(output_dir)
-
-    tokenizer = QuesNetTokenizer.from_pretrained(output_dir,
-                                                 img_dir=path_append(abs_current_dir(__file__),
-                                                                     "../../static/test_data/quesnet_img",
-                                                                     to_str=True))
-    train_params = {
-        'max_steps': 2,
-        'feat_size': 256,
-        'save_every': 1,
-        'emb_size': 256
-    }
-    pretrain_quesnet(path_append(abs_current_dir(__file__),
-                                 "../../static/test_data/quesnet_data.json", to_str=True),
-                     output_dir, tokenizer, True, train_params)
-
-    tokenizer_kwargs = {
-        'tokenizer_config_dir': output_dir,
-    }
-    i2v = QuesNet('quesnet', 'quesnet', output_dir,
-                  tokenizer_kwargs=tokenizer_kwargs, device="cpu")
-    t_vec = i2v.infer_token_vector(quesnet_data[0], key=lambda x: x["ques_content"])
-    i_vec = i2v.infer_item_vector(quesnet_data[0], key=lambda x: x["ques_content"])
-    assert t_vec.shape[-1] == 256
-    assert i_vec.shape == torch.Size([1, 256])
-    t_vec = i2v.infer_token_vector(quesnet_data[:2], key=lambda x: x["ques_content"])
-    i_vec = i2v.infer_item_vector(quesnet_data[:2], key=lambda x: x["ques_content"])
-    assert t_vec.shape[0] == 2, t_vec.shape
-    assert i_vec.shape[0] == 2, i_vec.shape
-
-    assert i2v.vector_size == 256
-
-    # test pretrained embeddings
-    ie = ImageAE(train_params['emb_size'])
-    meta_size = len(tokenizer.stoi['know_name'])
-    me = MetaAE(meta_size, train_params['emb_size'])
-    ie.load_state_dict(torch.load(os.path.join(output_dir, 'trained_ie.pt')))
-    me.load_state_dict(torch.load(os.path.join(output_dir, 'trained_me.pt')))
-    _QuesNet(_stoi=tokenizer.stoi, feat_size=train_params['feat_size'],
-             emb_size=train_params['emb_size'],
-             rnn='GRU',
-             embs=np.load(os.path.join(output_dir, 'w2v_embs.npy')),
-             pretrained_meta=me, pretrained_image=ie)
-    with pytest.raises(ValueError):
-        _QuesNet(_stoi=tokenizer.stoi, feat_size=train_params['feat_size'],
-                 emb_size=train_params['emb_size'],
-                 rnn='wrong_rnn',
-                 embs=np.load(os.path.join(output_dir, 'w2v_embs.npy')),
-                 pretrained_meta=me, pretrained_image=ie)
diff --git a/tests/test_vec/test_vec.py b/tests/test_vec/test_vec.py
index e12665a4..d97d1d96 100644
--- a/tests/test_vec/test_vec.py
+++ b/tests/test_vec/test_vec.py
@@ -14,7 +14,7 @@
 def stem_data(data):
     _data = []
     for e in data[:10]:
-        d = e["stem"]
+        d = e["ques_content"]
         _data.append(d)
     assert _data
     return _data
@@ -45,16 +45,16 @@ def stem_text_tokens(stem_data):
 @pytest.fixture(scope="module")
 def stem_data_general(data):
     test_items = [
-        {'stem': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
+        {'ques_content': '有公式$\\FormFigureID{wrong1?}$和公式$\\FormFigureBase64{wrong2?}$，\
             如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$,若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'},
-        {'stem': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
+        {'ques_content': '如图$\\FigureID{088f15ea-8b7c-11eb-897e-b46bfc50aa29}$, \
             若$x,y$满足约束条件$\\SIFSep$，则$z=x+7 y$的最大值为$\\SIFBlank$'}
     ]
     data = test_items + data
     _data = []
     tokenizer = GensimWordTokenizer(symbol="gmas", general=True)
     for e in data[:10]:
-        d = tokenizer(e["stem"])
+        d = tokenizer(e["ques_content"])
         if d is not None:
             _data.append(d.tokens)
     assert _data