近些年来,不少师生用《超级画板》或类似的动态几何作图软件探索研究几何问题,取得了丰富的经验.这些经验中最主要之点,就是把图形看作是可变的,把一幅静态的图形想象成某个变化过程中的一个环节.这样一来,有关这个静态图形的命题,就可能变成一个新的命题.如果新的命题成立,探 In recent years, many teachers and students have made rich experience in using “super drawing board” or similar dynamic geometry mapping software to explore and study geometric problems.The most important point of these experiences is to regard graphics as a variable, Imagine a static graphic as a part of a process of change, so that the proposition about the static graphic may become a new proposition. If the new proposition holds,