牛津英语模块七第一单元reading课件.ppt

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1、M7Unit1LivingwithtechnologyrefrigeratorwashingmachineAirconditionermicrowaveovenvacuumcleanerdesktoplaptopTheevolutionofvideoandsounddevicesReadingstrategy:understandingheadingsIfyouwanttoobtainsomespecificinformation,forinstance,informationaboutsatelliteTV,fromthispassageasfastasp

2、ossible,whatwillyoudo?Lookingatsubtitles（副标题）______historyofTV(inorderof______)Earlyhistoryof____________________________goesdigitalTVAudiodevicesEarlytimemodernage:CableTV,satelliteTV,digitalTV,…The_______soundrecordersSoundandvideoFastreadingTVPartOne:（L1-25)Carefulreadingblack-a

3、nd-whiteTVMakeatimelineofthedevelopmentofTV1925ThefirstpublicTVbroadcastweremadeintheUSA1928Long-distanceTVbroadcastwasmadebetweentheUKandtheUSA.Regularpublicbroadcastingbegan.1938ThefirstcolorTVprogramwasbroadcast1951RegularcolorTVbroadcastsbeganintheUSAJohnLogieBairdMostearlyTVbr

4、oadcastsweremadeusinghissystem.However,hissystemwasvery________andhadmany____________.primitivedrawbacksEarlyhistory(1-17)PhiloFarnsworth————————Hemadeimportant______________inthedevelopmentofTV.ModernTVsusemanyofthe___________firstdiscoveredbyhim.breakthroughsprinciples1962Satelli

5、teswereusedtobroadcastTVTheModernage(19-25)SatellitesmakeTV_________topeoplewholivefarawayfromcities.accessibleSatelliteTVdishesTheycanoftenbeseenthroughoutthecountrysideandremoteareas.However,mostpeoplebenefit______satelliteTV,aslocalTVcompaniesbroadcastthe_______tothepopulationli

6、vingnearby.fromsignalsdistributedPartTwo:(L26-52)AudioDevicesEarlyhistoryofsounddevices(26-32)1877:ThomasEdisonmadethefirstrecordingofahumanvoice.tubesEarlyrecordplayersused______torecordon.Heuseddiscsasalternativestotubes.Who'she?EmileBerinertaperecorderssteeltapeSoundandvideodevi

7、ces(33-41)In1982,thefirst_______________usedtocopysoundwereinGermany.Mostearlyrecordersemployed__________torecordon.steeltapePortablecassetteplayerweredevelopebythe________late1960sVideorecordersBythelate1970s,videorecordersforhomeusewereintroduced.___________(1982)Digitalera数字时代__

8、_____(1993)_______(1995)VC