牛津英语模块七第一单元reading.ppt

M7Unit1Livingwithtechnology,refrigerator,washingmachine,Airconditioner,microwaveoven,vacuumcleaner,desktop,laptop,Theevolutionofvideoandsounddevices,Readingstrategy:understandingheadings,Ifyouwanttoobtainsomespecificinformation,forinstance,informationaboutsatelliteTV,fromthispassageasfastaspossible,whatwillyoudo?,Lookingatheadingsandsubtitles（副标题）,_historyofTV,(inorderof_),Earlyhistoryof_godigital,TV,Audiodevices,Early,time,modern,age:CableTV,satelliteTV,digitalTV,The,_,soundrecorders,Soundandvideo,Fastreading,1.ColorTVbecamepopularwithinjustafewyearsafteritwasinvented.()2.PeoplewithoutsatellitedishesdonotbenefitatallfromsatelliteTVbroadcasts.(),Reading(PartC1):,F（12-14）,F（24）,3.Someofthefirsttaperecordersusedplastictapetorecordon.()4.RecordsandcassettesdonotofferasgoodasoundqualityasCDs.()5.Newtechnologywillsoonmakemanyofthethingstalkedaboutinthearticleoutofdate.(),T（43-45）,F（28）,T(49-50),TV,PartOne:（L1-25),Carefulreading,black-and-whiteTV,MakeatimelineofthedevelopmentofTV,1925,ThefirstpublicTVbroadcastweremadeintheUSA,1928,Long-distanceTVbroadcastwasmadebetweentheUKandtheUSA.Regularpublicbroadcastingbegan.,1938,ThefirstcolorTVprogramwasbroadcast,1951,RegularcolorTVbroadcastsbeganintheUSA,JohnLogieBaird,MostearlyTVbroadcastsweremadeusinghissystem.However,hissystemwasvery_andhadmany_.,primitive,drawbacks,Earlyhistory(1-17),PhiloFarnsworth,Hemadeimportant_inthedevelopmentofTV.ModernTVsusemanyofthe_firstdiscoveredbyhim.,breakthroughs,principles,1962,in,SatelliteswereusedtobroadcastTV,TheModernage(19-25),SatellitesmakeTV_topeoplewholivefarawayfromcities.,accessible,SatelliteTVdishes,Theycanoftenbeseenthroughoutthecountrysideandremoteareas.However,mostpeoplebenefit_satelliteTV,aslocalTVcompaniesbroadcastthe_tothepopulationlivingnearby.,from,signals,distributed,PartTwo:(L26-52),AudioDevices,Earlyhistoryofsounddevices(26-32),1877:ThomasEdisonmadethefirstrecordingofahumanvoice.,tubes,Earlyrecordplayersused_torecordon.,In1887,EmileBerlinerused_asalternativestotubes.,discs,taperecorders,Soundandvideodevices(33-41),In1928,thefirst_usedtocopysoundwereinGermany.Mostearlyrecordersemployed_torecordon.,steeltape,_weredevelopedbythe_,late1960s,Portablecassetteplayer,Videorecorders,Bythelate1970s,videorecordersforhomeusewereintroduced.,_(1982),Digitalera数字时代,_(1993),_(1995),VCD,DVD,thefirstCDs,Soundandvideogodigital,KeysforactivityD.1._2._3._4._5._6._7._8._