为了突出说明对象的本质特征,强调说明对象的内涵和外延,执教《中国石拱桥》时,我采取了逆写标题的教学方法. 我先写一个“桥”字,问学生:“谁能给桥下个定义呀?” 学生们七嘴八舌,议论纷纷,认为这个问题太简单了,我示意一个一个地说. In order to highlight the essential characteristics of the object and emphasize the intension and denotation of the object, I took the teaching method of rewriting the title when I was teaching the “Stone Arch Bridge in China.” I first wrote a “bridge” and asked the students: " Who can give the bridge a definition?” “The students were rapturous and talked about each other and thought that the problem was too simple. I said one by one.