多媒体投影机是一种新的电脑外设 ,可以将电脑等信号源转变为多媒体信息 ,将色彩艳丽的图像投射到大屏幕上。投影机声、图、文并茂的效果是任何传统手段都无法企及的。政府机构、事业单位、科研教育领域将会逐渐地采用 ,尤其在大中专院校 ,以往“电化教室”的闭路电视系统正逐? Multimedia projectors are a new type of computer peripheral that transforms sources such as computers into multimedia information and projects colorful images onto the big screen. Projector sound, map, Wen Mao’s effect is unmatched by any traditional means. Government agencies, institutions, scientific research and education will gradually be adopted, especially in colleges and universities, the past, “classroom” CCTV system is?