高一英语M2Unit3ComputerPeriod1:Warmingup(WHOAMI?)WarmingupThissectionisanintroductiontothetopic．Itistogetthestudentsthinkingaboutthedifferentwayscomputerscanbemade．Dothispartofthelessoninpairsandasaspeakingactivity．WarmingupbytalkingaboutcomputerLookatthepicturesonpage17.Whatarethey?Whatdotheyhaveincommon?Yes,theyarecomputers.Thenwhatisacomputer?Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.DrawontheblackboardadiagramtoillustratetheinfluenceofthecomputerandtheInternetovertheschooleducation．Belowisadiagramyoumayliketouse．Askstudentstolookatthediagramandconsider,”WhatchangeshavecomputersandtheInternetbroughttoschools?Whatchangeswilltheybringtoschoolsinthefuture?”AsktheSstoworkingroupsandtomakealistofthepossiblechangestheycanthinkof．Whenmostofthegroupshavetheirlistsready,theteachercanholdaclassdiscussion．Writedownthemajorchangesthestudentsthinkofunder/besidethediagram．Theteachercanaddoneortwochangesthatmayaffecttheirownteaching．Forexample,“ComputersandtheInternetcanhelpbusyparentscontactteachersbyemail．”Theteachercanendthetaskwithabriefsummary,orholdafurtherdiscussiontofindoutstudents'personalopinionsaboutthechanges．Forexample,askthem,“Doyoulikeallthesechanges?Whyandwhynot?Whatchangesdoyoulike/dislike?”Someinformation:计算机室Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer’soperatingsystemanddata.Computerprogramscanbeinstalledontoacomputer.Some用心爱心专心peoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.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,GigabyteandNibbleCPU–CentralProcessingUnit,AnothernameforprocessorData-InformationstoredonacomputerDisk-Aplacetostoredata.Email-Electronicmail.GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.Load-GetdatafromadiskNibble-HalfaByteSave-PutdataonadiskRAM–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,partoftheInternetPeriod2-3Pre-reading&Reading用...
