英语：UNIT 1 READING TV AND AUDIO DEVICES课件（牛津译林版选修7）.ppt

1、 M7 Unit1What would life be like without them?Free talkaudio devicesReading:TV and audio devices -a reviewa report of past eventsGuessaccording to the title:What does the passage talk about?What is the writers purpose in writing the passage?Read the text and finish Part A on P2.v 1.When did regular

2、public TV broadcasting begin around the world?v 2.What is WebTV?v 3.What was invented in 1954?It began on 11 May 1928 in New York and in London on 20 August 1929.It is the TV set combined with the World Wide Web.The cassette recorder.Fast-reading:True or false exercises1.Thomas Edison made the first

3、 recording 2.of a human voice.2.Until 1972,most people used black-and-white TV.3.Satellite TV is delivered with greater clarity than digital TV.4.The first record player was invented before 1877.5.Transistor technology was first used to receive radio programmes,and then to develop cassette recorders

4、.6.CDs were invented about ten years before the MD player was invented.7.MP3 technology began in Germany in 1987.Digital TVsatellite TVaftermilitary usefor(by _ of equipment)_history of TVtypes(in order of_)Early history of_ goes digitalTVAudio devicesEarlytimemodernSoundage:Cable TV,satellite TV,di

5、gital TV,The _audio devicesTape recorders and playersHow is the passage organized _.A.by paragraphs B.in chronological order C.by concepts D.by sub-topicsStructurespecific yearsthe eventsCareful-readinghistory of TVYearEvent First public showings of wireless TV transmissions were made in the USA.Cab

6、le TV began in the USA;3 American scientists invented the transistor.19511962International standards for digital TV were established.First WebTV set-top boxes came onto the market.19251948Colour broadcasts began in the USA.Satellites began to be used to broadcast TV.198919961.Who might be the invent

7、or of the first TV?A.Vladimir Zworykin from Russia.B.Philo Farnsworth in the USA.C.John Logie Baird from Scotland.D.It remains uncertain.2.How many countries have put digital TV into operation according to the passage?A.Only one.B.Already two.C.At most three.D.At least four.specific yearsthe eventsa

8、udio devicesYearEvent187719481954First LPs(long-play records)came onto the market.198219871992Invention of transistor led to the development of cassette recorders.First recording of a human voice was made.1958First CDs produced by using digital technology were made available.Development of MP3 techn

9、ology started in Germany.Development of MD player began.3 American scientists invented the transistor.audio devices 1.Who might have attributed to the development of the Walkman?A.two Japanese engineers.B.three American scientists.C.Thomas Edison.D.Emile Berliner.2.What is the main factor that cause

10、s the music websites to spring up all over the Internet?A.The popularity of Walkman.B.The development of the MD player.C.The development of MPs technology.D.The wide use of Discman.Task-reading任务型阅读Title:TV and audio devices:a reviewEarly history of TVThree men made great _1_ to the development of T

11、V between 1923 and 1927.In 1925,the first public showings of _2_ TV transmissions were made,which was _3_ by regular public broadcasting in 1928.The modern age:cable TV,satellite TV,digital TVCable TV came onto use in 1948 in the USA,but only a few _4_ had it at that time,while satellite TV _5_ to b

12、roadcast TV in 1962.Digital TV,which was introduced in 1996 when the first WebTV set-top boxes came onto the _6_ is considered to be _7_ than satellite TV.contributionswirelessfollowedhouseholdsbeganmarketbetterEarly history of audio devicesThomas Edison,the greatest _8_ the world has ever seen,made

13、 the first recording of a human voice in 1877.The first record player was invented by Emile Berliner.Tape recorders and playersTwo young Japanese engineers applied the _9_ of transistor to create the transistor radio.In 1979,the Walkman,a portable pocket-sized take player was invented.Sound goes dig

14、italIn 1982,the first CDs were made _10_.The next new development was the MD player in 1992.availabletechnologyinventorConsolidation The first public showings of _ TV transmissions were made in 1925.It took another three years _ there was any _ public broadcasting,first in the USA and in the _ year

15、in Britain.People must have found it quite a _ when color TV was first _ in 1929.However,_ the next 65 years,people would be able to choose what to watch from a _ of 200 channels because of digital TV.It is _ that in 1998,66 percent of _ in the USA had cable TV.The _ of audio devices started with Th

16、omas Edisons first _,and then moved on to different kinds of tape recorders,and finally CDs,which were _ in the 1980s.It may be surprising that Germany is the _ of MP3,not Japan or the USA.These things all bring great _ and delight to peoples lives.wirelessdelightbeforefollowingregularwithinshownvar

17、ietyhouseholdsreportedevolutionrecordingbirthplaceintroducedconvenience6.对作出贡献13.彩色的14.黑白电视19.比好;优于22.有机会使用25.上市26.做问卷调查27.与其他观众聊天32.被手动上发条38.电流45.声音数字化.52.正如名称所示16.花了50年才有66的美国家庭拥有了它.contribute to in colourblack-and-white TVbe superior tohave access tocome on to the marketrespond to questionnairesc

18、hat to other viewersbe wound up by handan electric currentSound goes digital.as the name indicatesIt took 50 years before 66percent of American households had it.Underline the phrases.advantagesdisadvantagesdiscussion:meet peoples needs.have improved peoples lives to some degree.radiation from them may be harmful to peoples health.generate large amount of waste,which is harmful to the environment.to sum upv Read the text and try to memorize the words and expressions.v Do Language practice on page 102.