It is to sketch the course, principle and its teaching function.

前言：简述了“蓝瓶子”实验的过程原理及在教学中的重要功能；

youdao

It is to sketch the course, principle and its teaching function.

前言：简述了“蓝瓶子”实验的过程原理及在教学中的重要功能；

youdao