diff --git a/PythonThinking/task2&3 课后练习及补充.md b/PythonThinking/task2&3 课后练习及补充.md
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@@ -1,12 +1,9 @@
 # 1 基础 课后练习及补充
 
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 ## 1.1 数据类型相关练习
 
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 ### 1.1.1 数据类型转换
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   运行下面单元格，了解`int()`，`float()`，`str()`，`type()`等的用法