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1、少儿英语儿童英语故事大全孩子学英语,离不开脍炙人口的寓言小故事,阅读这些英文短文故事,不但能扩充词汇量,还能在阅读之余体味其中深义,瑞思学科英语特别甄选了短文故事大全,为孩子学英语提供有力的英文资料,还有更多英文给本、英语电影、英语动画片、英语书籍、英文儿歌等,敬请关注瑞思学科英语,免费获得以上资料哦~>01Television电视电视--以快速变化与发展为标志的最普遍、最具有影响力的一项现代技术,正在步入一个极端复杂化与多样化的新时代。这个时代承诺重新塑造我们的生活和我们的世界。这可以称得上是又一次电子革命,其关键在于电视技术与计算机技术的结合。"电视"这个
2、词来源于希腊语词根(tele:远)和拉丁语词根(vision:景象),可以从字面上理解为来自远处的景象。简单说来,电视是以这种方式工作的,通过一个复杂的电子系统,电视能够将一幅图像(这幅图像被聚焦在一部摄像机内的一块特殊的光导底片上)转换成能经过导线或电缆发送出去的电子脉冲信号。Television--themostpervasiveandpersuasiveofmoderntechnologies,markedbyrapidchangeandgrowth–ismovingintoanewera,aneraofextraordinarysophisticati
3、onandversatility,whichpromisestoreshapeourlivesandourworld.Itisanelectronicrevolutionofsorts,madepossiblebythemarriageoftelevisionandcomputertechnologies.Theword"television",derivedfromitsGreek(tele:distant)andLatin(visio:sight)roots,canliterallybeinterpretedassightfromadistance.Ver
4、ysimplyput,itworksinthisway:throughasophisticatedsystemofelectronics,televisionprovidesthecapabilityofconvertinganimage(focusedonaspecialphotoconductiveplatewithinacamera)intoelectronicimpulses,whichcanbesentthroughawireorcable.Theseimpulses,whenfedintoareceiver(televisionset),canth
5、enbeelectronicallyreconstitutedintothatsameimage.Televisionismorethanjustanelectronicsystem,however.Itisameansofexpression,aswellasavehicleforcommunication,andassuchbecomesapowerfultoolforreachingotherhumanbeings.Thefieldoftelevisioncanbedividedintotwocategoriesdeterminedbyitsmeanso
6、ftransmission.First,thereisbroadcasttelevision,whichreachesthemassesthroughbroad-basedairwavetransmissionoftelevisionsignals.Second,thereisnonbroadcasttelevision,whichprovidesfortheneedsofindividualsorspecificinterestgroupsthroughcontrolledtransmissiontechniques.Traditionally,televi
7、sionhasbeenamediumofthemasses.Wearemostfamiliarwithbroadcasttelevisionbecauseithasbeenwithusforaboutthirty-sevenyearsinaformsimilartowhatexiststoday.Duringthoseyears,ithasbeencontrolled,forthemostpart,bythebroadcastnetworks,ABC,NBC,andCBS,whohavebeenthemajorpurveyors(货物、服务、消息等的提供者,供
8、应者)ofnews,informati