来自:查字典高考网 2014-12-25
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 Greekand Latinroots, 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 imageinto 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.
【托福写作背诵文选全集(7)】相关文章:
★ 托福写作活用小词
[标签:海外留学,语言考试,托福,,]
NBA流言收割机 第6集 神预测?高考数学试题暗示猛龙勇士4
探秘历史 第二季 第211集 此人高考数学考了0分,因作文写3句话被重点大学录取
amc传媒音乐影像 第一季 第598集 西安原创乐队走进英泰青卓 用音乐助力高考学子
创艺第二届:2019届高考录取表彰大会暨“核桃音乐节”合影——你只管努力,剩下的交给创艺
2019全国高考志愿填报攻略 第50集 天津市高考历史三年本科录取排名
乾坤已定,组合解读2019高考数学全国3卷理科18题,你是黑马吗?
他高考作文仅得6分,总分428分,被985高校录取,却被导师拒绝!
高考阅卷名师给考生的高考作文密训课 第3集 高考作文审题实操方法精讲(一)
沈阳音乐学院郎亦农教授的女高音高考曲目解析课程 第1集 沈阳音乐学院郎亦农为你讲解女高音高考曲目