一、前言　　目前 ,用多媒体语言教学软件代替传统语言课本的呼声渐高。而现代教育课程设置的一个重要理念是 :如果利用不同的媒体能达到相似的教学效果 ,那么其中投资较少的一种应被采用 (Ｃｌａｒｋ ,1 994)。多媒体教学所需投资大大高出传统的课本教学。为了得以推广 ,多媒 First, the preface At present, multimedia language teaching software to replace the traditional language texts are getting louder. An important concept of modern education curricula is that if similar media can be used to achieve similar teaching effects, then one of the less expensive ones should be adopted (Clark, 1994). The investment required for multimedia teaching is much higher than the traditional textbook teaching. In order to be promoted, multimedia