unit 3 computer

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1、Unit3Computer+第二教}育#资3源网o　　Unit3Computer　　PartOne:TeachingDesign(第一部分：教学设计)　　Period1:Asamplelessonplanforreading　　(WHOAMI?)　　Aims　　Totalkaboutcomputer　　Toreadaboutcomputer　　Procedures　　I.Warmingup　　Warmingupbytalkingaboutcomputer　　Lookatthepicturesonpage17.Whatarethey?Whatdotheyhaveinco

2、mmon?Yes,theyarecomputers.Thenwhatisacomputer?　　Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.　　计

3、算机室　　Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer’soperatingsystemanddata.Computerprogramscanbeinstalledontoacomputer.SomepeoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowsthecomputerstosendandreceivedat

4、aandemailacrosstheworld.　　曙光3000巨型计算机　　Acomputerisnowalmostalwaysanelectronicdevice.Itusuallycontainsmaterialswhicharetoxic;thesematerialswillbecometoxicwastewhendisposedof.Whenanewcomputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledprod

5、uctstewardship.　　Insomecountriesoldcomputersarerecycled(melteddown)togetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.　　Computersbecomeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemwithintwoorthreeyears.Thismakestheproblemw

6、orse.Computerrecyclingisthuscommon.Manyprojectstrytosendworkingcomputerstodevelopingnationssotheycanbere-usedandwillnotbecomewasteasquickly.　　Computerjargon计算机行话　　Computerjargonmeanswordstodowithcomputersandsurroundingtopics.Knowingwhatthesewordsmeancanhelpyouknowmoreaboutcomputers.Somepe

7、opleusethesewordstoimpressotherpeople(Alsoknownasbuzzwords).　　Examplesofjargon:　　Bit-Thesmallestdataunit,caneitherbea“0.”ora“1.”.　　Byte-unitofdata.SeealsoKilobyte,Megabyte,GigabyteandNibble　　CPU–CentralProcessingUnit,Anothernameforprocessor　　Data-Informationstoredon