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  3. Television Television——the most pervasive and persuasive of modern technologies, marked by rapid change and growth—is moving

Television Television——the most pervasive and persuasive of modern technologies, marked by rapid change and growth—is moving

admin2017-04-24  0
问题     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 (vision: 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 non-broadcast television, which provides for the needs of individuals or specific interest groups through controlled transmission techniques.
    Traditionally, television has been a medium of the masses. We are most familiar with broadcast television because it has been with us for about thirty-seven years in a form similar to what exists today. During those years, it has been controlled, for the most part, by the broadcast networks, ABC, NBC, and CBS, who have been the major purveyors of news, information, and entertainment. These giants of broadcasting have actually shaped not only television but our perception of it as well. We have come to look upon the picture tube as a source of entertainment, placing our role in this dynamic medium as the passive viewer.  
Which of the following is NOT mentioned in the passage as a function of electronics in television transmissions?
选项 A、The conversion of an image into electronic impulses.
B、The sending of impulses through a wire cable.
C、The changing of one image into another image.
D、The feeding of impulses into a receiver.
答案C
解析 事实细节题。第二段提到电视的工作原理，先把图像转换为电子脉冲并用电线或电缆传输，这些脉冲到达接收器时，被还原为相同的图像，所以答案应为C。
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