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：
[标签：海外留学,语言考试,托福,,]
1000张学生用草稿纸考研专用免邮空白便宜薄演草演算纸白纸本书写纸批发打草a4大张实惠装18k高考数学草稿本
你高考成绩高吗？这道题目怎能成立？高难度奥数，能不能把你难住
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
一边扔试卷一边玩摇滚？这个学校的高考减压方式，真是帅到没朋友
高考前必听的5首励志歌曲，《Dream it possible》最能鼓舞人心！
广州早晨 2019 山西一高中班主任带学生骑行1800公里去上海
视频|2019全国高考今日开考: 语文特级教师评析上海卷高考作文
高考体育四项生的日常训练——深蹲移动跳：发展膝关节，踝关节力量。
张雪峰高考志愿填报指南 第28集 高考志愿分析，材料科学与工程专业，就业很一般，建议慎重选择
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
衍声高考琴行2019高本硕学生暑假音乐会 张俊瀚《陕北民歌主题变奏曲》《阿根廷舞曲》第三乐章
