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1、M7U1ReadingTheevolutionofvideoandsounddevicesImportantexpressionstheevolutionofvideoandsounddevicesTitleshortlyafterwardsL4contributedtothedevelopmentofTVL6wasveryprimitiveandhadmanydrawbacksL8madeimportantbreakthroughsL9inthelate1920sandearly1930sL10TVsusemanyoftheprinciplesL10constructedthefirstco
2、lourTVL12regularcolourTVbroadcastsweredelayedL15withinashorttimeL15SatellitesallowTVprogrammestobebroadcastliveL19overvastdistancesL20overalongdistanceL2P5makeTVaccessibletopeoplewholivefarawayfromcitiesL21throughoutthecountrysideandtheremoteareasL22-23asmallpercentageofpeopleL23benefitfromsatellite
3、TVL24broadcastthesignalsL24-25madethefirstrecordingofahumanvoiceL27usedroundtubestorecordonL28-29useddiscsasalternativetotubesL30bewoundupbyhandL31Timessurelyhavechanged!L32employedsteeltapetorecordonL35bythelate1960sL38-39Soundandvideogodigital.L42ThefirstCDsweremadeavailable.L43makethingsofthepast
4、L49-50keeppacewithL51foreseewhatthefuturewillbringL51-52adaptationsweremadeL9P5RelayconversationandmusicL9P5hadaccesstoL13(倒数L3)P5TheprimarymeansofgettingnewsandentertainmentL14(倒数L2)P51.Many different people contributed to the development of TV. (L6) 2. 很多不同的人对电视的发展作出了贡献。很多不同的人对电视的发展作出了贡献。contribut
5、e: verb vi or vt 1) 捐助，贡献捐助，贡献 必修必修6 Come to the meeting if you feel you have something to contribute. Her family have contributed 50, 000 to the fund.2) 投稿投稿 She contributes to several magazines. contribute to sth. 有助于，成为有助于，成为的原因的原因 Smoking certainly contributed to his early death.注意：以下短语中注意：以下短语中
6、 “to” 是是介词介词，后接名词或动名词后接名词或动名词：look forward to; take to; refer to; get/be used to; be/get/become accustomed to; lead to; contribute to；devote to; pay attention to; get down to; the key to2. It took more than two decades, though, until 1951, for colour broadcasts to begin in the USA. (L13-14) 但是彩色电视节目
7、一直到但是彩色电视节目一直到1951年才得以年才得以在美国开播在美国开播,这其间一共经历了二十多年的时间。这其间一共经历了二十多年的时间。though conj.1) 虽然虽然She hasnt phoned, even though she said she would.2) 但是但是Theyre coming next week, though I dont knowwhich day.adv.despite this: 可是可是,不过不过We were at school together. I havent seen her for years though.as if/though
8、似乎似乎,仿佛仿佛She looked as if shed had some bad news.I felt as though Id been lying in the sun for hours.They stared at me as if I was crazy. even though 尽管尽管Even though he left school at 16, he still managed to become prime minister.delaysth.until推迟到推迟到 The opening of this section of the road is delaye
9、d until September.2)tomakesomeoneorsomethinglate延误seriously/badly/slightlyetcdelayedThe flight was badly delayed because of fog.3.RegularcolourTVbroadcastsweredelayedintheUKuntil1967.L15delay(v.)1)towaituntilalatertimetodosomethingHe delayed his decision on whether to call an election.推迟delaydoingst
10、h.Big companies often delay paying their bills.4.SatellitesallowTVtobebroadcastliveovervastdistances,L19-20live(adj.)1)alivetelevisionorradioprogramisseenorheardontelevisionorradioatthesametimeasitisactuallyhappening直播的2)a live radio phone-in showThere will be live TV coverage of tonights big match.
11、2)notdeadorartificial=living生动的experiments on live animals3)aliveperformanceisoneinwhichtheentertainerperformsforpeoplewhoarewatching,ratherthanafilm,recordetc有生气的，活泼的The band will be giving a live concert performance next week.4)awireorpieceofequipmentthatislivehaselectricityflowingthroughit（正在）通电的
12、Be careful - those wires are live.live(adv.)Theceremonywillbebroadcastliveontelevision.直播ThematchwillbeshownlivebytheBBC.Ilovetheirmusic,butIveneverseenthemperformlive.现场ThebandisplayingliveinBirminghamtonight.现场5.TheyalsomakeTVaccessibletopeoplewholivefarawayfromcities,L21accessible(adj.)1)easytoob
13、tainoruse容易获得或使用2)accessibletothe need for an efficient health service that is accessible to alleasily/readilyaccessibleComputers should be made readily accessible to teachers and pupils.2)aplace,building,orobjectthatisaccessibleiseasytoreachorgetintoThe island is only accessible by boat.There is a
14、church which is easily accessible from my home.3)someonewhoisaccessibleiseasytomeetandtalkto,eveniftheyareveryimportantorpowerfulI think that youll find shes very accessible.4)abook,poem,paintingetcthatisaccessibleiseasytounderstandandenjoyHe wants his music to be accessible to everyone.access(n.)1)
15、therighttoenteraplace,usesomething,seesomeoneetchaveaccessto进入，得到，获得进入，得到，获得1、Access to the papers is restricted to senior management.2、Cats should always have access to fresh, clean water.2)howeasyordifficultitisforpeopletoenterapublicbuilding,toreachaplace,ortalktosomeone（容易或难以）进入、通向accesstoa hous
16、e with easy access to the seaaccess(n.)3)tosucceedinenteringaplaceorinseeingsomeoneorsomething获得进入的方法、找到进入的路、进入gain/getaccess(tosth)The police managed to gain access through an upstairs window.access(vt.)使使进入、获得（信息）进入、获得（信息）tofindinformation,especiallyonacomputerUsers can access their voice mail rem
17、otely.6.ThefirstrecordplayershadtobewoundupbyhandL31wind(v.)(wound,wound)1)toturnortwistsomethingseveraltimesaroundsomethingelse绕、缠绕windstharound/roundsth The hair is divided into sections and wound around heated rods.2)toturnpartofamachinearoundseveraltimes,inordertomakeitmoveorstartworking上/紧发条als
18、owindupDid you remember to wind the clock?3)ifaroad,riveretcwindssomewhere,ithasmanysmoothbendsandisusuallyverylong蜿蜒前行wind(itsway)through/alongetcsthHighway 99 winds its way along the coast.a winding path4)tomakeatapemoveinamachine进带、到带windsthforward/backCan you wind the video back a little way - I
19、 want to see that bit again.Understandingdifficultsentences1.Regularpublicbroadcastingfollowedshortlyafterwards,firstbeginningon11May1928inNewYorkL4Regularpublicbroadcastingfollowedshortlyafter.Regularpublicbroadcastingfirst_on11May1928inNewYork.began2.itwasnotuntil1938thatthefirstcolourTVprogrammew
20、asbroadcast.L12-13ThefirstcolourTVprogramme_.3.SatelliteswereusedtobroadcastTVbeginningin1962.L19SatelliteswereusedtobroadcastTVandthis_in1962.wasnotbroadcastuntil1938began 4.andsosatellitedishescanoftenbeseendistributedthroughoutthecountrysideandtheremoteareas.L22-23andsoyoucanoftensee_throughoutth
21、ecountrysideandtheremoteareas.5.broadcastthesignalstheygetfromsatellitereceiverstothepopulationlivingnearby.L25broadcastthesignalstheygetfromsatellitereceiverstothepopulation_nearby.satellitedisheswholivedistributed6.Technologyisnowchangingfasterthanmostpeoplecankeeppacewith.L51Mostpeople_.cannotkeeppacewiththespeedofthechangingoftechnologyRead the text again and again. Try to memorize the language points.Parts A and B on pages 106 & 107 in Workbook.
