人教版高中英语必修二Unit-3-computers-readingppt课件.pptx

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1、Unit3ComputersGuess!Atoy?Ahandbag?ComputersIamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.DoyouknowwhoIam?abacusGuessmore:Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsuseme

2、whensolvingmathematicalproblems.DoyouknowwhoIam?calculatorIcanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.notebookcomputer/laptopDoy

3、ouknowwhoIam?LookatthefollowingpicturesandtelltheirEnglishnames.abacuscalculatorhugecomputerPCpersonalcomputerlaptopPDAPersonalDigitalAssistantrobotCanyoutellthedevelopmentofcomputers?abacuscalculatorhugecomputerPClaptopPDArobotReadingWhoamI?Thisisashort_

4、_______ofthe______________ofcomputers.Themainideaofthepassage:historydevelopmentPredicatingWhoamI?ComputerListentothepassageandfindoutthedevelopmentofcomputersinthefollowingyears.Listening16421822TheanalyticalmachinewasmadebyCharlesBabbage.19361940s1960sT

5、hefirstfamilyofcomputerswasconnectedtoeachother.1970sNowTimeline:Thecomputerbeganasacalculatingmachine．Thecomputergrewrapidlybothinsizeandinbrainpower.Thecomputerhadgrownaslargeasaroom.Computerswereusedinofficesandhomes.Computerisadevotedfriendandhelperof

6、thehumanrace.ParaI:ParaII:ParaIII:WhoamI?OvertimeIhavebeenchangedquitealot.Thesechangesonlybecamepossibleasmymemoryimproved.Sincethe1970smanynewapplicationshavebeenfoundoutforme.Skimthepassageandfindoutthetopicsentenceineachparagraph.Readpara1andfillinthe

7、chart.(2mins)CarefulreadingTimeMachineApplicationsIn1642A__________machine________difficultsumsAboutin_____AnanalyticalmachineThink_________In1936A________machineSolveanydifficultproblemBythe1940sAlargermachine______worriedthedesigners____________Persona

8、lcomputer/Laptop______________________________calculatingSimplify1822logicallyuniversalRealitySincethe1970sUsedinofficesandhomesMyshapedidn’tchangeeventhoughmymemoryimproved.TheolderIam,thelargerIhavebecome.Overtime