牛津英语模块七第一单元PPT课件.ppt

M7Unit1Livingwithtechnology 1 refrigerator 2 washingmachine 3 Airconditioner 4 microwaveoven vacuumcleaner 5 desktop laptop 6 Theevolutionofvideoandsounddevices 7 Readingstrategy understandingheadings Ifyouwanttoobtainsomespecificinformation forinstance informationaboutsatelliteTV fromthispassageasfastaspossible whatwillyoudo Lookingatsubtitles 副标题 8 historyofTV inorderof Earlyhistoryof goesdigital TV Audiodevices Early time modern age CableTV satelliteTV digitalTV The soundrecorders Soundandvideo Fastreading 9 TV PartOne L1 25 Carefulreading 10 black and whiteTV 11 MakeatimelineofthedevelopmentofTV 1925 ThefirstpublicTVbroadcastweremadeintheUSA 1928 Long distanceTVbroadcastwasmadebetweentheUKandtheUSA Regularpublicbroadcastingbegan 1938 ThefirstcolorTVprogramwasbroadcast 1951 RegularcolorTVbroadcastsbeganintheUSA 12 JohnLogieBaird MostearlyTVbroadcastsweremadeusinghissystem However hissystemwasvery andhadmany primitive drawbacks Earlyhistory 1 17 13 PhiloFarnsworth Hemadeimportant inthedevelopmentofTV ModernTVsusemanyofthe firstdiscoveredbyhim breakthroughs principles 14 1962 SatelliteswereusedtobroadcastTV TheModernage 19 25 SatellitesmakeTV topeoplewholivefarawayfromcities accessible 15 SatelliteTVdishes Theycanoftenbeseenthroughoutthecountrysideandremoteareas However mostpeoplebenefit satelliteTV aslocalTVcompaniesbroadcastthe tothepopulationlivingnearby from signals distributed 16 PartTwo L26 52 AudioDevices 17 Earlyhistoryofsounddevices 26 32 1877 ThomasEdisonmadethefirstrecordingofahumanvoice 18 tubes Earlyrecordplayersused torecordon 19 Heuseddiscsasalternativestotubes Who she EmileBeriner 20 taperecorders steeltape Soundandvideodevices 33 41 In1982 thefirst usedtocopysoundwereinGermany Mostearlyrecordersemployed torecordon steeltape 21 Portablecassetteplayerweredevelopebythe late1960s 22 Videorecorders Bythelate1970s videorecordersforhomeusewereintroduced 23 1982 Digitalera数字时代 1993 1995 VCD DVD thefirstCDs Soundandvideogodigital 24 walkman CDplayer MP3 MP4 iPad 25 1 ColorTVbecamepopularwithinjustafewyearsafteritwasinvented 2 PeoplewithoutsatellitedishesdonotbenefitatallfromsatelliteTVbroadcasts Reading PartC1 F 12 14 F 24 26 3 Someofthefirsttaperecordersusedplastictapetorecordon 4 RecordsandcassettesdonotofferasgoodasoundqualityasCDs 5 Newtechnologywillsoonmakemanyofthethingstalkedaboutinthearticleoutofdate T 43 45 F 28 T 49 50 27 KeysforactivityD 1 2 3 4 5 6