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初中物理中常出现一类关于液面升降问题的习题或考题，其主要特点是两个或两个以上的物体浸在同一种液体里，物体经过某种变化后，问液面高度怎样变化．这类问题由于涉及的知识点多、综合性强，学生普遍感到困难．教学中我尝试引导学生利用整体法解这类问题，效果较好．下面介
In junior high school physics, there is often a class of exercises or questions about liquid surface lifting problems. Its main feature is that two or more objects are immersed in the same liquid. After a certain change in the object, how does the height of the liquid surface change? This type of problem is generally difficult for students because of the knowledge and complexity involved. In teaching, I try to guide students to use the overall method to solve this kind of problem, and the effect is better. Below