公开课课件unit3-computers

L/O/G/O’tlikemenow.DoyouknowwhoIam?Riddles(谜语)abacusIamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculatorIamverybig.Scientistsusemetosolvesomemathematicalproblems.hugecomputerDoyouknowwhoIam?PCPersonalComputerI’masmall,relativelyinexpensivecomputerdesignedforanindividualuser.Athome,peopleusemetosurftheInternetandplaygames.DoyouknowwhoIam?Icanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.DoyouknowwhoIam?laptopPDAPersonalDigitalAssistantIamsosmallinsizethatIcanfitinyourhand.Iusuallyhaveasmallscreenusuallybiggerthanadigitalphone,howeversmallerthanthesmallestlaptop,I’magreatwaytostoretelephonenumbers,accesstheinternet,makecalculations,andsoon.DoyouknowwhoIam?robotI’mamachinethatworksautomatically.Icandoawidevarietyoftasks,especiallysuitablefordoingjobstooboring,difficult,ordangerousforhumanbeings.DoyouknowwhoIam?Icando…withacomputerIfyouhaveacomputer,whatwouldliketodomost?cosplaysearchfor…seemovieslistentomusicreadbooksandmagazinesdrawpictureslookatphotographsonthecomputersendemailstofriendsdownloadmusicandfilmsbuythingsonlineplaygamesonthecomputerChattingonlinePlayinggamesWatchingmoviesSearchingforinformationproblemsShoppingListeningtomusicSendingEmailsThedevelopmentofcomputers•Thepassageonpage18willyoumoreWHOAMI?Reading1.Whoisthespeakerinthisstory?2.What’sthemainideaofthispassage?A.Thedevelopmentofcomputers.B.Thedevelopmentanduseofcomputers.C.Amachinewhichissimple-minded.D.Computersmayreplacehumanbeings.Acomputer.Skimming(3minutes)ReadingComprehensionITopicsentences123Thesechangesonlybecamepossibleasmymemoryimproved.Sincethe1970smanynewapplicationshavebeenfoundforme.Para1:Para2:Para3:OvertimeIhavebeenchangedquitealot.16421822TheanalyticalmachinewasmadebyCharlesBabbage.Thecomputerbeganasacalculatingmachine．1936Thecomputergrewrapidlybothinsizeandinbrainpower.1.Finishthetimelinebelow.Scanning(5-8minutes)1940sThefirstfamilyofcomputerswasconnectedtoeachother.1970sNow1960sComputerswereusedinofficesandhomes.Computersconnectpeopleallovertheworldtogether.Thecomputerhadgrownaslargeasaroom.Readthepassageagain.Findthetopicsentenceofeachparagraphandthesupportingdetails.Paragraph1:OvertimeIhavebeenchangedquitealot.1.calculatingmachine2.analyticalmachine3.universalmachine4.laptopWhile-readingParagraph2:Thesechangesonlybecamepossibleasmymemoryimproved.1.tubes2.transistors3.chips4.network5.WorldWideWebWhile-readingParagraph3:Sincethe1970smanynewapplicationshavebeenfoundforme.1.communications2.finance3.trade4.robots5.mobilephones6.medicaloperations7.spacerockets8.providingalifeofhighqualityWhile-readingabacushugecomputerPCcalculatorlaptopPDAWhat’snext?Whatdotheytellyouaboutthedevelopmentofcomputers?robotWhataretheadvantagesanddisadvantagesofthecomputers?DiscussionTheadvantage/disadvantageis…Ithink/don’tthinkthat…Ithink…becauseof…Let’sdecide…As/Since…,Ithink…Iagree/don’tagree…because…First…Second…Ibelievethat…I’vedecidedthat…Readthepassageagain.Underlinethesentencesthatyoudonotunderstandandtrytosolvetheproblemsusingcontextcluesandthedictionary.V.HomeworkL/O/G/O!