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  3. Television that most pervasion and persuasive of modern technologies, marked by rapid change and growth is moving into a new era

Television that most pervasion and persuasive of modern technologies, marked by rapid change and growth is moving into a new era

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问题     Television that most pervasion 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.
    Very simply put, television works in this way: through a sophisticated system of electronics, television provides the capability of converting an image 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.
    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 one broadcast television, which provides for the needs of individuals or specific interest groups through controlled transmission techniques.
    Traditionally, we are most familiar with broadcast television; ABC, NBC and CBS have been the major purveyors of news,information, and entertainment. But now, in addition, we have CNN, Cable News Network, the first global TV news company. With its advent, the very definition of news was rewritten from something that has happened to something that is happening at the very moment you are hearing of it. In 1991 ,one of the most eventful years of this century, the world witnessed the dramatic and transforming impact of live televised news coverage on the latest developments. For turning viewers in 150 countries into instant witnesses of history, whereby influencing the dynamic of events, Robert Edward Turner president of CNN, was Time’s Man of the Year for 1991.
According to the passage, how many major networks are there? (  )
选项 A、Two.
B、Three.
C、Four.
D、Five.
答案C
解析 判断题。文章第四段中提到了ABC，NBC，CBS，以及CNN共四种网络站点。
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