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Unit3Computers单元课件（人教课标必修2）Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.DoyouknowwhoIam?abacusRiddles(谜语)Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculatorIamverybig.Scientistsusemetosolvesomemathematicalproblems.hugecomputerDoyouknowwhoIam?PCPersonalComputerI’masmall,relativelyinexpensivecomputerdesignedforanindividualuser.I’mbasedonthemicroprocessortechnology.Athome,peopleusemetosurftheInternetandplaygames.DoyouknowwhoIam?Icanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.DoyouknowwhoIam?laptopPDAPersonalDigitalAssistantIamsosmallinsizethatIcanfitinyourhand.Iusuallyhaveasmallscreenusuallybiggerthanadigitalphone,howeversmallerthanthesmallestlaptop,I’magreatwaytostoretelephonenumbers,accesstheinternet,makecalculations,andsoon.DoyouknowwhoIam?PDAabacuscalculatorhugecomputerPClaptopWhat’snext?Canyoutellthedevelopmentofcomputers?robotWHOAMI?ReadingSkimmingtogetmainidea1.Whoisthespeakerinthisstory?2.What’sthemainideaofthispassage?A.Thedevelopmentofcomputers.B.Thedevelopmentanduseofcomputers.C.Amachinewhichissimple-minded.D.Computersmayreplacehumanbeings.Acomputer.SkimmingReadingComprehensionIScanningtogetdetailinformation1.Whowasthefirstpersontomaketheearliestcomputer?A.AlanTuring.B.CharlesBabbage.C.CharlesTuring.D.AlanBabbage.2.Whenwasthe“universalmachine”built?A.In1822.B.In1642.C.In1936.D.In1970.ScanningReadingComprehensionⅡ3.Whenwasthecomputerthebiggest?A.In1642.B.In1936.C.Inthe1940s.D.Inthe1970s.4.Howoldisthecomputer?A.About170yearsold.B.About270yearsold.C.About370yearsoldD.About470yearsold.Scanning5.Whichofthefollowingisintherightorderoftime?a.Thecomputerwasconnectedwithothercomputers.b.AlanTuringwroteabookaboutthecomputer.c.ThecomputerhasbeensenttoexploretheMoonandMars.d.Thecomputerbegantosimplifydifficultsums.A.a.b.c.d.B.b.c.a.d.C.d.a.c.b.D.d.b.a.c.ScanningCarefulreadingtosolvedifficultpointstimeline1642:1822:1936:1940s:1960s:1970s:Now:Scanning:Thecomputerbeganasacalculatingmachine.theAnalyticalMachinewasbuiltbyCharlesBabbage.Thecomputergrewrapidlybothinsizeandinbrainpower.Computerhadgrownaslargeasaroom.Computerswereusedinofficesandhomes.Computersconnectpeopleallovertheworldtogether.ThefirstfamilyofcomputerswasconnectedtoeachotherParagraph1TopicsentenceOvertimeIhavebeenchangedquitealot.Supportingdetails1calculatingmachine2analyticalmachine3universalmachine4PC5laptopParagraph2TopicsentenceThesechangesonlybecamepossibleasmymemoryimproved.Supportingdetails1tubes2transistors3chips4network5WorldWideWebDoyouknowinwhatwayscomputersareusedtoday?searchfor…seemovieslistentomusicreadbooksandmagazinessendemailstofriendsdownloadmusicandfilmsbuythingsonlineplaygamesonthecomputerdrawpictureslookatphotographsonthecomputerCarefulreadingtosolvedifficultpointsParagraph3TopicsentenceSincethe1970smanynewapplicationshavebeenfoundforme.Supportingdetails1communications2finance3trade4robots5mobilephones6medicaloperations7spacerockets8providingalifeofhighquality1.MyrealfatherwasCharlesBabbage,whowroteabookandbuiltmein1936.2.Iwasbroughtintopeople’shomesinthe1970s.3.SincemybirthIhavebeenbuilttotaketheplaceofthehumanrace.TrueorFalseTest4.IbeganasacalculatingmachineinJapanin1642.5.In1936,Igrewrapidlybothinsizeandinbrainpower.6.Astimewentby,Iwasmadebigger.7.Sincethe1970smanynewapplicationshavebeenfoundforme.TestIbeganasa__________________in1642inFrance.In1822Iwasbuiltasan_________________.Thenin1936AlanTuringwroteabookandbuilta________________.Astheyearshavegoneby,Ihavebeenmade_______and________butIbecame_________and_________.calculatingmachineanalyticalmachinemachineuniversalsmallersmallerclevererquickerInthe______theygavemeafamilyconnectedbya________.NowpeoplecallittheInternet.Ihavebeenusedin______and______sincethe1970s.SoIbecamePC.Sincemy_____Ihavetrulybeenbuilttoservethe___________.network1960shumanraceofficeshomesbirthHomework•1.Readthetextafterclassandlookformoreinformationaboutthedevelopmentanduseofthecomputeranditsapplications.•2.Retellthepassage.