在初中物理习题中,有相当数量的比较类习题。其中有一部分习题只要求学生在定性分析的基础上,判定出它们之间的大小、多少等关系。多年来,我采用学生熟悉的线性函数图象,来求解这一类习题。由于图象的直观性,学生易懂、易掌握,取得了较为理想的教学效果。下面是本人归纳出的三种解题方法。 In junior high school physics exercises, there are quite a few comparative exercises. Some of the exercises only require students to determine the size, number, etc. of their relationships based on qualitative analysis. Over the years, I have used familiar linear function images to solve this type of problem. Because of the intuitiveness of the image, the students are easy to understand and easy to grasp and have achieved a more ideal teaching effect. The following are the three methods I have outlined.