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 and Latin 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 into electronic impulses, which can be sent through a wire or cable. These impulses, when fed into a receiver , 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 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.
名师讲解如何备考SAT作文
SAT OG作文满分范文2
攻克SAT作文三步走
SAT真题作文题目汇总11-18
SAT写作技巧分享
SAT OG Essay作文范文1
SAT作文真题解析
SAT写作题目大全 81-86
SAT作文素材名人类33:Ted Turner
SAT写作常考话题总结
SAT写作真题题目总结 27-34
如何写好SAT作文的开头
SAT考试写作素材two horses
如何写好SAT考试中的作文
SAT满分作文欣赏(一) 含点评
SAT作文五段式方法
SAT写作的几个要点 from CB
SAT作文范文一篇
SAT作文题目大全 72-76
10月9日SAT写作参考范文一
SAT考试作文题目总结19-26
SAT作文高分的3个秘密
SAT写作重点话题讲解(一)
SAT作文常用名言名句总结
SAT写作Essay部分经验总结
九步修改你的SAT作文
SAT写作真题题目大全 49-54
SAT写作参考范文 Consciousness and Avarice
SAT作文写作例子 Sample Essay
SAT写作名人素材艾柯卡
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |