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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,M7 Unit1Living with technology,1/28,refrigerator,2/28,washing machine,3/28,Air conditioner,4/28,microwave oven,vacuum cleaner,5/28,desktop,laptop,6/28,The,evolution,of video and sound devices,7/28,Reading strategy:understanding headings,If you want to,obtain,some specific information,for instance,information about,satellite,TV,from this passage as fast as possible,what will you do?,Looking at headings and subtitles,（副标题）,8/28,_,history of TV,(in order of_),Early history of_,_ go digital,TV,Audio,devices,Early,time,modern,age:Cable TV,satellite TV,digital TV,The,_,sound recorders,Sound and video,Fast reading,9/28,1.Color TV became popular within just a few years after it was invented.(),2.People without satellite dishes do not benefit at all from satellite TV broadcasts.(),Reading(Part C1):,F,（,12-14,）,F,（,24,）,10/28,3.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offer as good a sound quality as CDs.(),5.New technology will soon make many of the things talked about in the article out of date.(),T,（,43-45,）,F,（,28,）,T,(49-50),11/28,TV,Part One:,（,L1-25),Careful reading,12/28,black-and-white TV,13/28,Make a timeline of the development of TV,1925,The first public TV broadcast were made in the USA,1928,Long-distance TV broadcast was made,between the UK and the USA.,Regular public broadcasting began.,1938,The first color TV program was broadcast,1951,Regular color TV broadcasts began in the USA,14/28,John Logie Baird,Most early TV broadcasts were made using his system.However,his system was very _,and had many _.,primitive,drawbacks,Early history(1-17),15/28,Philo Farnsworth,He made important _ in the development of TV.Modern TVs use many of the _ first discovered by him.,breakthroughs,principles,16/28,1962,in,Satellites were used to broadcast TV,The Modern age(19-25),Satellites make TV _ to people who live far away from cities.,accessible,17/28,Satellite TV dishes,They can often be seen,throughout the countryside and remote areas.,However,most people benefit _ satellite TV,as local TV companies broadcast the _ to the population living nearby.,from,signals,distributed,18/28,Part Two:,(L26-52),Audio Devices,19/28,Early history of sound devices(26-32),1877:,Thomas Edison made the first recording,of a human voice.,20/28,tubes,Early record players used _,to record on.,21/28,In 1887,Emile Berliner,used _ as alternatives to tubes.,discs,22/28,tape recorders,Sound and video devices(33-41),In1928,the first_used to copy sound were in Germany.Most early recorders employed _ to record on.,steel tape,23/28,_,were developed by the _,late 1960s,Portable cassette player,24/28,Video recorders,By the late,1970s,video recorders for home use were introduced.,25/28,_(1982),Digital era,数字时代,_(1993),_(1995),VCD,DVD,the first CDs,Sound and video go digital,26/28,Keys for activity D.,1._ 2._ 3._,4._ 5._ 6._,7._ 8._,e,d,h,c,f,a,b,g,27/28,Keys for activity E.,1._ 2._,3._ 4._,5._ 6._,7._,foresaw,drawbacks,constructed,delayed,percentage,receiver,Eventually,28/28,
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