“正确使用酒精灯”是科学课教师的基本功,在上“沸腾”一课时,笔者向学生介绍酒精灯的正确使用方法,学生听得也特别认真。教师开始示范操作,刚点上火,突然听见“砰”的一声,一个不明“飞行物”拔桌而起,着实吓坏了所有人。当飞起的陶瓷灯芯管落下来时,我意识到这是一个 “Proper use of alcohol lamps” is a basic skill of science teachers. When the “boiling” lesson was over, the author introduced students to the correct use of alcohol lamps. Students also listened carefully. The teacher began the demonstration operation and was just getting angry. Suddenly he heard a bang, and an unknown “flying object” rose from the desk and really frightened everyone. When the flying ceramic wick fell, I realized it was a