判断液面的高度变化问题，在各种物理竞赛中时常出现．然而，许多同学对这类问题的处理往往思维受阻，难以得出满意的结论．对此，本文将根据不同情况，对液面高度变化的判断归纳出几种不同的判断方法，供同学们学习时参考．一、但质判断法例1如图1所示，一块冰漂浮在盛有水的? The problem of judging the height change of the liquid surface often occurs in various physical competitions. However, many students deal with this kind of problem often thinking blocked, it is difficult to draw satisfactory conclusions. In this regard, this article will summarize several different methods of judging changes in liquid surface height according to different conditions, for reference when students learn. First, but the quality of judging the law as shown in Figure 1, an ice floating in the water?