资源描述：
《Unit 3 Computers 教案1》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、Unit3Computers教案1（WHOAMI?)IntroductionInthisperiod,afterthewarmingup,studentswillfirstbeguidedtoimagineandsharetheirviewsaboutthetechnology.TheywillthenbehelpedtoreadanarrationentitledWHOAMI.Examplesof“WarmingUp”designsarepresentedinthisbookforteachers’
2、reference.Computerandoverheadprojectormaybeusedtoaidtheteachingandlearning.ObjectivesTotalkaboutcomputerToreadaboutcomputerFocusWordssimplify,sum,operator,logically,solve,reality,personal,network,finance,applications,exploreExpressionstechnologicalrevolution,a
3、rtificialintelligence,asaresult,anyhowPatternsFromthenon,Igrewrapidlybothinsizeandinbrainpower.AsaresultItotallychangedmyshape.Overtimemymemoryhasdevelopedsomuchthat,likeanelephant,IneverforgetanythingIhavebeentold!AidsMultimediafacilities,tape-recorder,photos
4、,diagramsProceduresI.Warmingup1.WarmingupbytalkingaboutcomputerLookatthepicturesonpage17.Whatarethey?Whatdotheyhaveincommon?Yes,theyarecomputers.Thenwhatisacomputer?Acomputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowle
5、dgeisstoredinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak;thesecomputerscanbeusedforvoicemail.计算机室Acomputerfrequentlyrequiresabootdevice.Thebootdevicecontainsthecomputer’soperatingsystemanddata.Computerprogramsc
6、anbeinstalledontoacomputer.SomepeoplethinkthatcomputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowsthecomputerstosendandreceivedataandemailacrosstheworld.曙光3000巨型计算机Acomputerisnowalmostalwaysanelectronicdevice.Itusually
7、containsmaterialswhicharetoxic;thesematerialswillbecometoxicwastewhendisposedof.Whenanewcomputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledproductstewardship.Insomecountriesoldcomputersarerecycled(melteddown
8、)togetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.Computersbecomeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemw
