随着多媒体、网络等现代化信息技术的迅猛发展和教学改革的不断深入，计算机在教育领域中的应用备受人们关注。CAI（ComputerAssistedInstruction）课件应用于课堂教学是外语教学发展的新趋势，它充分利用声、画、视频等多媒体手段，创设情境，化隐为显，化静为动，化无声为有? With the rapid development of modern information technology such as multimedia and networks and the continuous deepening of teaching reforms, the application of computers in the field of education has attracted much attention. The application of CAI (Computer Assisted Instruction) courseware in classroom teaching is a new trend in the development of foreign language teaching. It makes full use of multimedia means such as sound, painting, and video to create a situation, conceal it as a sign, turn silence into action, and change it into silence.