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设置演示实验必须按照“外观变化显著易于观察、装置简单便于安装、实验方法可靠易于操作”的三个基本原则,演示实验功能可按照客观效果以及演示者的主观意图分为“展开课题、发现规律、验证化学理论”三种类型;根据课堂教学实际需要,教师可增设演示实验内容、调整演示实验在教学进程中的先后顺序。
The demonstration experiment must be in accordance with the three basic principles of “appearance changes significantly easy to observe, the device is simple and easy to install, the experimental method is reliable and easy to operate ”, demonstration experiment function can be divided according to the objective effect and the presenter’s subjective intent According to the actual needs of classroom teaching, teachers may set up additional demonstration experiments to adjust the sequence of demonstration experiments in the teaching process.