超全精美教案最新人教版高一英语必修2教学案Unit 3 Computer.docx
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超全精美教案最新人教版高一英语必修2教学案Unit3Computer
Unit3Computer
PartOne:
TeachingDesign(第一部分:
教学设计)
Period1:
Asamplelessonplanforreading
(WHOAMI?
)
Aims
Totalkaboutcomputer
Toreadaboutcomputer
Procedures
I.Warmingup
Warmingupbytalkingaboutcomputer
Lookatthepicturesonpage17.Whatarethey?
Whatdotheyhaveincommon?
Yes,theyarecomputers.Thenwhatisacomputer?
Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.
计算机室
Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer’soperatingsystemanddata.Computerprogramscanbeinstalledontoacomputer.SomepeoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowsthecomputerstosendandreceivedataandemailacrosstheworld.
曙光3000巨型计算机
Acomputerisnowalmostalwaysanelectronicdevice.Itusuallycontainsmaterialswhicharetoxic;thesematerialswillbecometoxicwastewhendisposedof.Whenanewcomputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledproductstewardship.
Insomecountriesoldcomputersarerecycled(melteddown)togetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.
Computersbecomeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemwithintwoorthreeyears.Thismakestheproblemworse.Computerrecyclingisthuscommon.Manyprojectstrytosendworkingcomputerstodevelopingnationssotheycanbere-usedandwillnotbecomewasteasquickly.
Computerjargon计算机行话
Computerjargonmeanswordstodowithcomputersandsurroundingtopics.Knowingwhatthesewordsmeancanhelpyouknowmoreaboutcomputers.Somepeopleusethesewordstoimpressotherpeople(Alsoknownasbuzzwords).
Examplesofjargon:
Bit-Thesmallestdataunit,caneitherbea“0.”ora“1.”.
Byte-unitofdata.SeealsoKilobyte,Megabyte,GigabyteandNibble
CPU–CentralProcessingUnit,Anothernameforprocessor
Data-Informationstoredonacomputer
Disk-Aplacetostoredata.
Email-Electronicmail.
GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.
Load-Getdatafromadisk
Nibble-HalfaByte
Save-Putdataonadisk
RAM–random-accessmemory(随机存取存储器),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,partoftheInternet
II.Pre-reading
1.QuestioningandansweringWhatdoyouknowaboutcomputer?
●Electronicmachinecapableofperformingcalculationsandothermanipulationsofvarioustypesofdata,underthecontrolofastoredsetofinstructions.Themachineitselfisthehardware;theinstructionsaretheprogramorsoftware.Dependinguponsize,computersarecalledmainframes,minicomputers,andmicrocomputers.Microcomputersincludedesk-topandportablepersonalcomputers.
●Amulti-functionelectronicdevicethatcanexecuteinstructionstoperformatask.
●Adevicethatacceptsinformation,processesit,andsuppliesanoutput.Acomputerusuallycontainsmemory,acontrolunit,arithmeticandlogicalunits,andameansforinputandoutput.
●aprogrammablehardwarecomponentthatiscontrolledbyinternallystoredprogramsandthatcanperformsubstantialcomputations(includingarithmeticandlogicoperations)withouthumanintervention.Acomputertypicallyconsistsofoneormoreprocessingunits,memoryunits,andassociatedperipheralinputandoutputdevices.
●Relatedtoautomationandelectronicdataprocessing.TheLibraryofCongresscommonlyclassesmostcomputer-relatedbooksinHF5548,QA75-76,Z52,T385,andsomeTKranges.
●amachineforperformingcalculationsautomatically
calculator:
anexpertatcalculation(oratoperatingcalculatingmachines)
●Acomputerisadeviceormachineformakingcalculationsorcontrollingoperationsthatareexpressibleinnumericalorlogicalterms.Computersareconstructedfromcomponentsthatperformsimplewell-definedfunctions.Thecomplexinteractionsofthesecomponentsendowcomputerswiththeabilitytoprocessinformation.Ifcorrectlyconfigured(usuallyby,programming)acomputercanbemadetorepresentsomeaspectofaproblemorpartofasystem.Ifacomputerconfiguredinthiswayisgive
2.DiscussingandsharingHowhavecomputerschangedourlives?
Somedaysoon,ifyouhaven’talready,you’relikelytoplugintothecomputernetworknationgrowinginourmidst.Computerterminals,orsmallcomp