在物理教学中，课内、外练习是学生巩固所学知识，拓宽知识面的重要一环，因此题目必须精选在选题过程中，教师不能满足于摘录现成的题目，有时要自己动手编写，怎样才能编写出合理、科学的命题呢？笔者认为必须考虑以下原则：1命题必须符合科学性在编写命题过程中，有时因考虑 In physics teaching, both in-class and out-of-class exercises are an important part for students to consolidate what they have learned and broaden their knowledge. Therefore, the topics must be carefully selected. In the process of selecting topics, teachers can not be satisfied with excerpts of existing problems and sometimes write their own , How to write a reasonable and scientific proposition? The author believes that we must consider the following principles: Propositions must be consistent with the scientific proposition in the process of preparation, sometimes due to consider