范文人教版高中英语必修2教案Unit 3 Computer.docx

范文人教版高中英语必修2教案Unit 3 Computer.docx

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范文人教版高中英语必修2教案Unit3Computer

人教版高中英语必修2教案Unit3Computer

　　Unit3computerPartone:

TeachingDesignPeriod1:

AsamplelessonplanforreadingAimsTotalkaboutcomputerToreadaboutcomputerProceduresI.warmingup

　　warmingupbytalkingaboutcomputerLookatthepicturesonpage17.whatarethey?

whatdotheyhaveincommon?

yes,theyarecomputers.Thenwhatisacomputer?

Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.　　计算机室

Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer’puterprogramscanbeinstalledontoacomputer.SomepeoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowsthecomputerstosendandreceivedataandemailacrosstheworld.　　曙光3000巨型计算机

Acomputerisnowalmostalwaysanelectronicdevice.Itusuallycontainsmaterialswhicharetoxic;thesematerialswillbecometoxicwastewhendisposedof.whenanewcomputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledproductstewardship.Insomecountriesoldcomputersarerecycledtogetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.　　computersbecomeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemwithintwoorthreeyears.Tputerrecyclingisthuscommon.manyprojectstrytosendworkingcomputerstodevelopingnationssotheycanbere-usedandwillnotbecomewasteasquickly.

computerjargon计算机行话computerjargonmeanswordstodowithcomputersandsurroundingtopics.knowingwhatthesewordsmeancanhelpyouknowmoreaboutcomputers.Somepeopleusethesewordstoimpressotherpeople.Examplesofjargon:

Bit-Thesmallestdataunit,caneitherbea“0.”ora“1.”.Byte-unitofdata.Seealsokilobyte,megabyte,GigabyteandNibblecPU–centralProcessingUnit,AnothernameforprocessorData-InformationstoredonacomputerDisk-Aplacetostoredata.Email-Electronicmail.GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.Load-GetdatafromadiskNibble-HalfaByteSave-PutdataonadiskRAm–random-accessmemory,themorethebetter.USB-UniversalSerialBus（通用串行总线，一种简化了插接多种附件的薄型插座）www-worldwideweb,partoftheInternetII.Pre-reading1.Questioningandanswering‑‑‑whatdoyouknowaboutcomputer?

●Electronicmachinecapableofperformingcalculationsandothermanipulationsofvarioustypesofdata,underthecontrolofastoredsetofinstructions.Themachineitselfisthehardware;theinstructionsaretheprogramorsoftware.Dependinguponsize,computersarecalledmainframes,minicomputers,andmicrocomputers.microcomputersincludedesk-topandportablepersonalcomputers.●Amulti-functionelectronicdevicethatcanexecuteinstructionstoperformatask.●Adevicethatacceptsinformation,processesit,andsuppliesanoutput.Acomputerusuallycontainsmemory,acontrolunit,arithmeticandlogicalunits,andameansforinputandoutput.●aprogrammablehardwarecomponentthatiscontrolledbyinternallystoredprogramsandthatcanperformsubstantialcomputationswithouthumanintervention.Acomputertypicallyconsistsofoneormoreprocessingunits,memoryunits,andassociatedperipheralinputandoutputdevices.●Relatedtoautomationandelectronicdataprocessing.TheLibraryofcongresscommonlyclassesmostcomputer-relatedbooksinHF5548,QA75-76,Z52,T385,andsomeTkranges.●amachineforperformingcalculationsautomaticallycalculator:

anexpertatcalculation●Aputersareconstructedfromcomponentsthatperformsimplewell-definedfunctions.Thecomplexinteractionsofthesecomponentsendowcomputerswiththeabilitytoprocessinformation.Ifcorrectlyconfiguredacomputercanbemadetorepresentsomeaspectofaproblemorpartofasystem.Ifacomputerconfiguredinthiswayisgive2.Discussingandsharing‑‑‑Howhavecomputerschangedourlives?

Somedaysoon,ifyouhaven’talready,you’puterterminals,orsmallcomputersconnectedviamodemtoordinarytelephonelines,shouldbeasubiquitousasthetelephoneitself.They’reamuchmoreusefulandhumanetoolthanthephone,andwithcorporateAmericabehindthemthenetworkswillbeeverywhere----changingourlivesmorethananytechnologysincetheautomobile.joiningacomputernetworkisthesameasjoiningacommunity.Smallsystemsarelikevillages,wherenewmembersareformallywelcomed.Thelargernetworks,theSourceandcompuServe,forexample,arecities-anonymous,fulloflifeandevents,butdifficulttofitinto.III.Reading1.ListeningandreadingtotherecordingofthetextwHoAmI?

Turntopage18andlistenandreadtotherecordingofthetext.Payattentiontothepauses,pronunciationandintonationofthenativereader.2.ReadingaloudandunderliningexpressionsNowwearetoreadthetextonceagainandunderlinealltheexpressionsinthetext.Putthemdownintoyournotebookafterclassashomework.collocationsfromwHoAmI?

beginas…,acalculatingmachine,bebuiltas…,followinstructionsfrom…,soundsimple,atthetime,a