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高二英语经典背诵:电视思维导图

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查看详情高二英语经典背诵:电视思维导图

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树图思维导图提供 高二英语经典背诵:电视 在线思维导图免费制作,点击“编辑”按钮,可对 高二英语经典背诵:电视  进行在线思维导图编辑,本思维导图属于思维导图模板主题,文件编号是:7662a602f0f2cfb7c06e3de516531639

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高二英语经典背诵:电视思维导图模板大纲

Television

Television -- the most pervasive and persuasive of modern technologies, marked by rapid change and growth -- is moving into a new era, an era of extraordinary sophistication and versatility, which promises to reshape our lives and our world. It is an electronic revolution of sorts, made possible by the marriage of television and computer technologies.

The word "television", derived from its Greek (tele: distant) and Latin (visio: sight) roots, can literally be interpreted as sight from a distance. Very simply put, it works in this way: through a sophisticated

system of electronics, television provides the capability of converting an image(focused on a special photoconductive plate within a camera) into electronic impulses, which can be sent through a wire or cable. These impulses, when fed into a receiver (television set), can then be electronically reconstituted into that same image.

Television is more than just an electronic system, however. It is a means of expression, as well as a vehicle for communication, and as such becomes a powerful tool for reaching other human beings.

The field of television can be divided into two categories determined by its means of transmission. First, there is broadcast television, which reaches the masses through broad-based airwave transmission of television signals. Second, there is nonbroadcast television, which provides for the needs of individuals or specific interest groups through controlled transmission

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