Unit 3 Computer 教学设计Word文档下载推荐.docx

Unit 3 Computer 教学设计Word文档下载推荐.docx

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Unit3Computer教学设计@#@Unit3Computer教学设计@#@Unit3Computer鏁欏璁捐Period1:

@#@WarmingupandreadingTeachingAimsTotalkaboutcomputerToreadaboutcomputerProceduresI.WarmingupWarmingupbytalkingaboutcomputerLookatthepicturesonpage17.Whatarethey?

@#@Whatdotheyhaveincommon?

@#@Yes,theyarecomputers.Thenwhatisacomputer?

@#@Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;@#@itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;@#@thesecomputerscanbeusedforvoicemail.璁＄畻鏈哄Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer鈥檚operatingsystemanddata.Computerprogramscanbeinstalledontoacomputer.SomepeoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowsthecomputerstosendandreceivedataandemailacrosstheworld.鏇欏厜3000宸ㄥ瀷璁＄畻鏈?

@#@Acomputerisnowalmostalwaysanelectronicdevice.Itusuallycontainsmaterialswhicharetoxic;@#@thesematerialswillbecometoxicwastewhendisposedof.Whenanewcomputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledproductstewardship.Insomecountriesoldcomputersarerecycled（melteddown）togetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.Computersbecomeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemwithintwoorthreeyears.Thismakestheproblemworse.Computerrecyclingisthuscommon.Manyprojectstrytosendworkingcomputerstodevelopingnationssotheycanbere-usedandwillnotbecomewasteasquickly.Computerjargon璁＄畻鏈鸿璇?

@#@Computerjargonmeanswordstodowithcomputersandsurroundingtopics.Knowingwhatthesewordsmeancanhelpyouknowmoreaboutcomputers.Somepeopleusethesewordstoimpressotherpeople（Alsoknownasbuzzwords）.Examplesofjargon:

@#@Bit-Thesmallestdataunit,caneitherbea鈥?

@#@.鈥?

@#@ora鈥?

@#@.鈥?

@#@Byte-unitofdata.SeealsoKilobyte,Megabyte,GigabyteandNibbleCPU锟紺CentralProcessingUnit,AnothernameforprocessorData-InformationstoredonacomputerDisk-Aplacetostoredata.Email-Electronicmail.GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.Load-GetdatafromadiskNibble-HalfaByteSave-PutdataonadiskRAM锟紺random-accessmemory（闅忔満瀛樺彇瀛樺偍鍣?

@#@,themorethebetter.USB-UniversalSerialBus锛堥€氱敤涓茶鎬荤嚎锛屼竴绉嶇畝鍖栦簡鎻掓帴澶氱闄勪欢鐨勮杽鍨嬫彃搴э級WWW-WorldWideWeb,partoftheInternetII.Pre-reading1.QuestioningandansweringWhatdoyouknowaboutcomputer?

@#@鈼廍lectronicmachinecapableofperformingcalculationsandothermanipulationsofvarioustypesofdata,underthecontrolofastoredsetofinstructions.Themachineitselfisthehardware;@#@theinstructionsaretheprogramorsoftware.Dependinguponsize,computersarecalledmainframes,minicomputers,andmicrocomputers.Microcomputersincludedesk-topandportablepersonalcomputers.鈼廇multi-functionelectronicdevicethatcanexecuteinstructionstoperformatask.鈼廇devicethatacceptsinformation,processesit,andsuppliesanoutput.Acomputerusuallycontainsmemory,acontrolunit,arithmeticandlogicalunits,andameansforinputandoutput.鈼廰programmablehardwarecomponentthatiscontrolledbyinternallystoredprogramsandthatcanperformsubstantialcomputations（includingarithmeticandlogicoperations）withouthumanintervention.Acomputertypicallyconsistsofoneormoreprocessingunits,memoryunits,andassociatedperipheralinputandoutputdevices.鈼廟elatedtoautomationandelectronicdataprocessing.TheLibraryofCongresscommonlyclassesmostcomputer-relatedbooksinHF5548,QA75-76,Z52,T385,andsomeTKranges.鈼廰machineforperformingcalculationsautomaticallycalculator:

@#@anexpertatcalculation（oratoperatingcalculatingmachines）鈼廇computerisadeviceormachineformakingcalculationsorcontrollingoperationsthatareexpressibleinnumericalorlogicalterms.Computersareconstructedfromcomponentsthatperformsimplewell-definedfunctions.Thecomplexinteractionsofthesecomponentsendowcomputerswiththeabilitytoprocessinformation.Ifcorrectlyconfigured（usuallyby,programming）acomputercanbemadetorepresentsomeaspectofaproblemorpartofasystem.Ifacomputerconfiguredinthiswayisgive2.DiscussingandsharingHowhavecomputerschangedourlives?

@#@Somedaysoon,ifyouhaven鈥檛already,you鈥檙elikelytoplugintothecomputernetworknationgrowinginourmidst.Computerterminals,orsmallcomputersconnectedviamodem（amodulator/demodulatorcircuitforencoding/decodingcomputer