简便易行的课堂实验安徽省淮南七中陆启文农村和山区中的一些学校，由于条件所限，常常讲实验．我们在教学中摸索出一些因陋就简的方法，例如用废旧的暖水瓶底代替凸面镜和四面镜；用一叠玻璃片或用一只方形瓶装满水代替玻璃砖；用黑白电视机上的高压电源代替感应圈等．材... Easy-to-follow classroom experiments. Lu Qiwen, a seven-in-one school in Huainan, Anhui Province. Some schools in rural areas and mountainous areas, due to limited conditions, often talk about experiments. In the teaching, we have tried to find some simple methods, such as replacing the convex mirror and four-sided mirror with the waste warm water bottle bottom; using a stack of glass or a square bottle filled with water instead of a glass block; replacing the induction coil with a high-voltage power supply on a black-and-white TV set. Wait. material...