在许多物理习题中附有图形或图像 .这些图形或图像 ,一方面表达了题意 ,另一方面又为解题提供了一个分析依据 .有时直接分析题图较难 ,若能适当作些转化 ,则很容易从中找到一些解题所必需的条件或是很容易理解题目所描述的意思 .一、将立体图转化为平面图立体示意图真实感强 , There are many physical exercises with graphics or images. These graphics or images, on the one hand, express the meaning of the questions, and on the other provide an analysis basis for problem solving. Sometimes it is difficult to directly analyze the questions and diagrams. If appropriate, some transformations can be made. , it is easy to find some necessary conditions for the problem solving, or it is easy to understand the meaning of the topic. First, the three-dimensional map into a three-dimensional map of the plane, a strong sense of reality,