传统的电教媒体中,幻灯投影有像无声,录音机有声无像,录像电视虽然声像俱全,但制作复杂,需要专门的设备。多媒体计算机辅助教学可以充分发挥“三机一幕”的优势,将图、文、声、像有机地结合起来,充分呈现知识形成的过程。形象生动的画面、言简意赅的解说、悦耳动听的背景音 Traditional audio-visual media, slide projector as silent, voice recorder without sound, although the video and audio video, but complex, requires specialized equipment. Multimedia computer-aided teaching can give full play to the advantages of “three machines and one scene” and combine the pictures, the texts, the sounds and the images organically to fully present the process of knowledge formation. Vivid picture, concise and absurd explanation, melodious sound background