本刊今年第4期《如何解答液面升降问题》一文,给出了应用“变化前后水槽底部受到的压力不变”来迅速、准确判断液面升降的方法.但这一方法有一个限制条件:“变化前后直壁容器中物体的总重力不变”,即只适用于水槽这样的容器,而对于其他形状的容器,如水杯状的圆台容器,就不适用, In the 4th issue of this year’s “How to Solve Liquid Level Lifting Problem”, a method of quickly and accurately judging liquid level rise and fall is given by applying “the pressure at the bottom of the sink before and after the change”. However, this method has a limiting condition. : “The total weight of the objects in the straight-walled container before and after the change does not change”, that is, it is only applicable to containers such as sinks, but it is not applicable to containers of other shapes such as cup-shaped round-table containers.