18．计算机媒介通讯（Computer Media Communication , CMC）：CMC 是以计算机网络为 媒体进行通讯的系统，如电子邮件、电子电传、网络电话等。
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The computer network technology, satellite communication technology and multi-media technology offer a new teaching mode for the distance education.
计算机网络技术、卫星通信技术和多媒体技术为远程教育提供了一种新的教学模式。
The Modern Educational Technology(MET)is an independent branch of education science. It applies the multi media computer and network communication technology to the practical activity of education.
现代教育技术是指以多媒体计算机和网络通讯技术为核心的信息技术应用于教育教学实践活动而产生并逐渐形成的一门教育技术学科。
It's transmission rate is decided by many factors including computer software and hardware, transmission media, communication apparatus and network protocols etc.
它的传输速率由计算机软硬件、传输介质、通讯设备、网络协议等决定。
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