人教新课标高中英语必修二Unit 3 Computers课件(1).ppt

,computers,Iamveryoldnow.IwasborninancientChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydontlikemenow.DoyouknowwhoIam?,Riddles(谜语),abacus,Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?,calculator,Iamverybig.Scientistsusemetosolvesomemathematicalproblems.,hugecomputer,DoyouknowwhoIam?,PCPersonalComputer,Imasmall,relativelyinexpensivecomputerdesignedforanindividualuser.Athome,peopleusemetosurftheInternetandplaygames.DoyouknowwhoIam?,Icanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseImsmallenoughforyoutotakemewithyou.DoyouknowwhoIam?,laptop,PDAPersonalDigitalAssistant,IamsosmallinsizethatIcanfitinyourhand.Iusuallyhaveasmallscreenusuallybiggerthanadigitalphone,howeversmallerthanthesmallestlaptop,Imagreatwaytostoretelephonenumbers,accesstheinternet,makecalculations,andsoon.DoyouknowwhoIam?,robot,Imamachinethatworksautomatically.Icandoawidevarietyoftasks,especiallysuitablefordoingjobstooboring,difficult,ordangerousforhumanbeings.DoyouknowwhoIam?,Icandowithacomputer,Ifyouhaveacomputer,whatwouldliketodomost?,cosplay,searchfor,seemovies,listentomusic,readbooksandmagazines,drawpictures,lookatphotographsonthecomputer,sendemailstofriends,downloadmusicandfilms,buythingsonline,playgamesonthecomputer,Chattingonline,Playinggames,Watchingmovies,Searchingforinformation,problems,Shopping,computers,Listeningtomusic,SendingEmails,Thedevelopmentofcomputers,Thepassageonpage18willyoumore,WHOAMI?,Reading,1.Whoisthespeakerinthisstory?,2.Whatsthemainideaofthispassage?A.Thedevelopmentofcomputers.B.Thedevelopmentanduseofcomputers.C.Amachinewhichissimple-minded.D.Computersmayreplacehumanbeings.,Acomputer.,Skimming(3minutes),ReadingComprehensionI,Topicsentences,1,2,3,Thesechangesonlybecamepossibleasmymemoryimproved.,Sincethe1970smanynewapplicationshavebeenfoundforme.,Para1:,Para2:,Para3:,OvertimeIhavebeenchangedquitealot.,Thecomputerbeganasacalculatingmachine,1936,Thecomputergrewrapidlybothinsizeandinbrainpower.,1.Finishthetimelinebelow.,Scanning(5-8minutes),1960s,Computerswereusedinofficesandhomes.,Computersconnectpeopleallovertheworldtogether.,Thecomputerhadgrownaslargeasaroom.,Readthepassageagain.Findthetopicsentenceofeachparagraphandthesupportingdetails.Paragraph1:OvertimeIhavebeenchangedquitealot.1.calculatingmachine2.analyticalmachine3.universalmachine4.laptop,While-reading,Paragraph2:Thesechangesonlybecamepossiblework5.WorldWideWeb,While-reading,Paragraph3:Svidingalifeofhighquality,While-reading,abacus,hugecomputer,PC,calculator,laptop,PDA,Whatsnext?,Whatdotheytellyouaboutthedevelopmentofcomputers?,robot,Whataretheadvantagesanddisadvantagesofthecomputers?,Discussion,Theadvantage/disadvantageisIthink/dontthinkthatIthinkbecauseofLetsdecideAs/Since,IthinkIagree/dontagreebecauseFirstSecondIbelievethat