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.
上一篇: 2011年英语六级考试写作练习文章3
2013高考英语复习素材:奥运会听力素材(Mp3)
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修8《Unit 2 The universal language》教学案
高三英语一轮单元复习精品教案:Module 3《Interpersonal Relationships—Friendship》(外研版选修6)
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》学案十
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 4 Law and order》学案三
广东省2017届高三英语一轮综合训练(9)
广东省2017高考英语一轮复习周周练 第二周 星期五
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》课件一
江苏省姜堰市张甸中学2017届高三英语一轮复习牛津译林版模块选修9《Unit 2 Witnessing time》基础过关作业四
广东省2017高考英语一轮复习周周练 第二周 星期三
广东省2017高考英语一轮复习周周练 第一周 星期二
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修8《Unit 4 Films and film events》复习学案
高三英语一轮单元复习精品教案:Module 1《British and American English》(外研版必修5)
广东省2017届高三英语一轮综合训练(1)
2017届湖北高考英语一轮复习基础知识课件:Unit4《Sharing》(新人教版选修7)
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修8《Unit 3 The world of colours and light》复习学案三
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》学案一
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》学案七
2013高考英语复习素材:表扬听力素材(Mp3)
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修9《Unit 2 Witnessing time》单词复习
广东省2017届高三英语一轮综合训练(2)
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 2 People on the move》课件二
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》课件二
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 1 Building the future》课件一
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》学案三
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修10《Unit 3 Protecting ourselves》学案五
广东省2017高考英语一轮复习周周练 第二周 星期四
江苏省姜堰市张甸中学2012届高三英语一轮复习牛津译林版模块选修9《Unit 2 Witnessing time》基础过关作业二
高三英语一轮单元复习精品教案:Module 6《Animals in Danger》(外研版必修5)
江苏省姜堰市张甸中学2017届高三英语一轮复习牛津译林版模块选修9《Unit 2 Witnessing time》基础过关作业一