液柱移动问题一直是“气体性质”一章的热点问题，对这类问题的求解学生颇感棘手，其原因在于：引发液柱移动的动因较多呈现“灵活性”；液柱两侧气体状态变化互相牵连和干扰呈现“复杂性”；知识内涵丰富呈现“综合性”；推理判断因果性强呈现“逻辑性”．因此如果缺乏对气体 The movement of the liquid column has always been a hot topic in the chapter “Gas Properties”. Students who find solutions to this type of problem are rather intractable. The reason is that the causes of liquid column movement are more “flexibility”; gas on both sides of the liquid column The interactions of state changes implicate and interfere with each other to present “complexity”; knowledge content is rich in “comprehensiveness”; reasoning and judgment is causality and strong “logicality”. So if there is a lack of gas