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M7Unit1
Livingwithtechnology
refrigerator
washingmachine
Airconditioner
microwaveovenvacuumcleaner
desktoplaptop
Theevolutionofvideoandsounddevices
Readingstrategy:understandingheadingsIfyouwanttoobtainsomespecificinformation,forinstance,informationaboutsatelliteTV,fromthispassageasfastaspossible,whatwillyoudo?Lookingatsubtitles(副标题)
______historyofTV(inorderof______)Earlyhistoryof____________________________goesdigitalTVAudiodevicesEarlytimemodernage:CableTV,satelliteTV,digitalTV,…The_______soundrecordersSoundandvideoFastreading
TVPartOne:(L1-25)Carefulreading
black-and-whiteTV
MakeatimelineofthedevelopmentofTV1925ThefirstpublicTVbroadcastweremadeintheUSA1928Long-distanceTVbroadcastwasmadebetweentheUKandtheUSA.Regularpublicbroadcastingbegan.1938ThefirstcolorTVprogramwasbroadcast1951RegularcolorTVbroadcastsbeganintheUSA
JohnLogieBairdMostearlyTVbroadcastsweremadeusinghissystem.However,hissystemwasvery________andhadmany____________.primitivedrawbacksEarlyhistory(1-17)
PhiloFarnsworth————————Hemadeimportant______________inthedevelopmentofTV.ModernTVsusemanyofthe___________firstdiscoveredbyhim.breakthroughsprinciples
1962SatelliteswereusedtobroadcastTVTheModernage(19-25)SatellitesmakeTV_________topeoplewholivefarawayfromcities.accessible
SatelliteTVdishesTheycanoftenbeseenthroughoutthecountrysideandremoteareas.However,mostpeoplebenefit______satelliteTV,aslocalTVcompaniesbroadcastthe_______tothepopulationlivingnearby.fromsignalsdistributed
PartTwo:(L26-52)AudioDevices
Earlyhistoryofsounddevices(26-32)1877:ThomasEdisonmadethefirstrecordingofahumanvoice.
tubesEarlyrecordplayersused______torecordon.
Heuseddiscsasalternativestotubes.Whoshe?EmileBeriner
tape
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