目前,多媒体已经成为课堂教学不可缺少的重要角色。多媒体可以把文字、图形、视频图像、动画和声音等信息有机结合在一起,使学习资料呈现的形式多样化、宏观微观现象可视化、抽象过程形象化。利用多媒体的人机交互功能,还可以促进学生自主学习、帮助教师因材施教。因此,如果使用得当,多媒体对提高课堂教学效 At present, multimedia has become an indispensable and important role in classroom teaching. Multimedia can combine texts, graphics, video images, animations and sounds and other information to make learning materials appear in the form of diversification, visualization of macro and micro phenomena, the abstract process of visualization. The use of multimedia interactive features, but also can promote students to learn independently to help teachers teach students according to their aptitude. Therefore, if used properly, multimedia can improve classroom teaching effectiveness