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1、 M7 Unit1Living with technology refrigeratorwashing machineAir conditioner microwave ovenmicrowave oven vacuum cleanervacuum cleaner desktop desktop laptop laptopThe evolution of video and sound devicesReading strategy:understanding headingsIf you want to obtain some specific information,for instanc
2、e,information about satellite TV,from this passage as fast as possible,what will you do?Looking at subtitles（副标题）（副标题）_history of TV(in order of_)Early history of_ goes digital TVAudio devicesEarlytimemodern age:Cable TV,satellite TV,digital TV,The _sound recordersSound and videoPart One:（L1-25)blac
3、k-and-white TVMake a timeline of the development of TV1925The first public TV broadcast were made in the USA1928Long-distance TV broadcast was made between the UK and the USA.Regular public broadcasting began.1938The first color TV program was broadcast 1951Regular color TV broadcasts began in the U
4、SAJohn Logie BairdMost early TV broadcasts were made using his system.However,his system was very _and had many _.primitivedrawbacksEarly history(1-17)Early history(1-17)Philo FarnsworthHe made important _ in the development of TV.Modern TVs use many of the _ first discovered by him.breakthroughspri
5、nciples1962 Satellites were used to broadcast TVThe Modern age(19-25)Satellites make TV _ to people who live far away from cities.accessibleSatellite TV dishesThey can often be seen throughout the countryside and remote areas.However,most people benefit _ satellite TV,as local TV companies broadcast
6、 the _ to the population living nearby.fromsignalsdistributedPart Two:(L26-52)Early history of sound devices(26-32)Early history of sound devices(26-32)1877:Thomas Edison made the first recording of a human voice.tubes Early record players used _to record on.He used discs as alternatives to tubes.Wh
7、os he?Whos he?Emile BerinerEmile Berinertape recorderssteel tapeSound and video devices(33-41)Sound and video devices(33-41)In1982,the first_used to copy sound were in Germany.Most early recorders employed _ to record on.steel tape Portable cassette player were develope by the _ late 1960sVideo reco
8、rdersBy the late 1970s,video recorders for home use were introduced._(1982)Digital era数字时代数字时代_(1993)_(1995)VCDDVDthe first CDs Sound and video go digitalSound and video go digitalwalkmanCD playerMP3MP4iPad1.Color TV became popular within just a few years after it was invented.()2.People without sat
9、ellite dishes do not benefit at all from satellite TV broadcasts.()Reading(Part C1):F（12-14）F（24）3.Some of the first tape recorders used plastic tape to record on.()4.Records and cassettes do not offer as good a sound quality as CDs.()5.New technology will soon make many of the things talked about in the article out of date.()T（43-45）F（28）T(49-50)Keys for activity D.1._ 2._ 3._ 4._ 5._ 6._ 7._ 8._edhcfabgKeys for activity E.1._ 2._3._ 4._5._ 6._7._foresawdrawbacksconstructeddelayedpercentagereceiverEventually