高中英语必修7Unit 1 Living with technology-Section 1VIP专享VIP免费

Unit1Livingwithtechnology-Section1PartTwoTeachingResourcesSection1AtextstructureanalysisofTVandaudiodevices:areviewI.SummaryofTVandaudiodevices:areviewMainideaofthepassagebriefintroductionofthehistoryofTVandaudiodevicesMainideaofpart1earlyhistoryofTVMainideaofpart2TVsinmodernageMainideaofpart3earlyhistoryofaudiodevicesMainideaofpart4thedevelopmentoftaperecordersandplayersMainideaofpart5theuseofdigitaltechnologyinsoundsII.AtreediagramofthetextIII.AretoldversionofthetextTVandaudiodevices:areviewThereadingpassageisareviewofthedevelopmentofthedevelopmentofTVandaudio用心爱心专心116号编辑TVandaudiodevice:areviewaudioeviceoldTVcolourTV(1929)wirelessTV(1925)long-distanceTV(1928)cableTV(1948)satellite(1962)Digital(1989)webTV(1996)recorderplayerThefirsthumanecord(1877)thefirstrecordplayer(1887)taperecordsandplayersThefirstorders(1931)theWalkman(1979)thetransistor(1948)ThefirstD(1982)MDlayer(1992)MP3(1987)modernTVthefirstLPs(1958)cassettecorder(1954)TVdevices.Itprovidessomeinformationaboutthehistory,thecurrentsituationandthefutureimprovementofTVandaudiodevices.TakeTVforexample,thefirstpublicshowingsofwirelessTVtransmissionstookplacewaybackin1925.ThenTVkeptprogressinginthefollowingdecadesandin1998,66percenthouseholdsintheUSAhadcableTV.AswithTV,audiodeviceshavebeendevelopingrapidlyandsurprisingly.Theseinventionsallbringgreatconvenienceanddelighttopeople’slives.用心爱心专心116号编辑