物理教学大纲不做要求，但有利于深化教材知识和构建知识体系，没有出现在教材里的内容，笔者称之为教材的“盲点”。比如学生学习《电磁振荡》的时候，提出为什么电容器放电完毕的一瞬间电流最大？给电容器充电完毕的一瞬间电流最小？学生无法从理论上推导，用实验又极难演示 The physics syllabus does not require, but it is helpful to deepen the teaching material knowledge and build the knowledge system. There is no content in the textbook. The author calls it the “blind spot” of the textbook. For example, when students study “electromagnetic oscillations”, why is the current at the moment when the capacitor is fully discharged? Is the current at the moment when the capacitor is fully charged? Students cannot be deduced theoretically, and it is extremely difficult to use the experiment to demonstrate