我们可以用手代替一些实验仪器做很多的实验,这些实验教师和学生都能做,可以自己,也可以共同完成,而且简单易行、形象直观、生动有趣、化难为简,能很快地解决很多实际问题。现介绍几个实例: We can use hands instead of some experimental instruments to do a lot of experiments. These experiments can be done by both teachers and students. They can be done by themselves or they can be completed together. They are easy to implement, intuitive, vivid, and difficult to simplify. They can be solved quickly. A lot of practical problems. Here are a few examples: