在物理习题处理中,我们常会遇到一些形相似而实质却不相同的问题,很多学生不加注意把头脑中原问题的解法直接迁移过来进行解答,结果形成错误.这些问题看似相同但实质却大相径庭,弄清这些问题的差异,充分挖掘题目中的隐含条件,将有利于提高学生分析问题、解决问题的能力.1“动杆 In the process of physical exercises, we often encounter some similar and substantive but not the same problem, many students do not pay attention to the solution of the original problems in the Central Plains directly migrate to answer, the results form a mistake.These problems seem the same, but the essence They are very different from each other, so it is helpful to make clear the differences between these problems and fully tap the implicit conditions in the subject so as to improve their ability to analyze and solve problems.1 "