在“浮力”一节的教学中,当我推导出一个容器中装有适量的水,水面上漂浮着一块冰,冰融化以后水面高低将保持不变时,一个学生露出十分疑惑的表情,于是我没有继续下面的内容,而是问那个同学:“有什么问题吗?”他说:“我在报纸上看到,如果南极冰山融化以后,海平面将上升,所以你的推导肯定是错误的。” In the teaching “Buoyancy”, when I deduced that a container filled with the right amount of water, a piece of ice floats on the surface of the water, the surface of the water will remain the same after the ice melts, a student reveals a very puzzled expression So I did not continue the following, but to ask the classmate: “What’s the problem? ” He said: “I saw in the newspaper, if the Antarctic icebergs melt, the sea level will rise, so your Derivation is definitely wrong. ”