a．用实验打开物理前言的大门。我们的物理教师对第一节前言课往往不那么重视，总是把重点放在以后的知识教学上，我认为这样做是不妥的。做什么事情都要有兴趣，特别是十三四岁的青少年，他们的知识面窄，好奇心特别强，上好第一堂物理课，用精彩有趣的实验打开物理的大门，对 a. Use experiments to open the door to the physical foreword. Our physics teachers tend to pay less attention to the preface class in the first section. They always focus on the teaching of knowledge in the future. I do not think it is appropriate to do so. You must be interested in what you do, especially when you are 13 or 14 years old. Their knowledge is narrow and their curiosity is particularly strong. Take the first physics class and open the physical door with exciting and interesting experiments.