成功的演示实验是激发学生浓厚而持久的学习兴趣的重要途径，氢气流吹肥皂泡实验即为一例。但课本中的实验设计是用玻璃导管吹肥皂泡，在实际操作中不易成功。其原因有两个：一是玻璃管太光滑，所蘸肥皂液较少，不易连续吹出多个肥皂泡，而且易使吹出的肥皂泡偏离管口，“结”? A successful demonstration experiment is an important way to stimulate students’ strong and lasting learning interest. One example is a hydrogen flow bubble experiment. However, the experimental design in the textbook is to use a glass tube to blow the soap bubbles. It is not easy to be successful in actual operation. There are two reasons for this: First, the glass tube is too smooth, there is less soap liquid, it is difficult to continuously blow out multiple soap bubbles, and it is easy to make the soap bubble out of the nozzle, “knot”?