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ComputersUnit3Atoy?Ahandbag?Acomputerisamachinewhichkeepsknowledgeinitsmemoryanddoesworkonthatknowledge.Thisknowledgeiskeptinsymbols;itiscalleddata.Acomputerusuallyhasamonitortoshowresults.However,somecomputerscanspeak.Thesecomputerscanbeusedforvoicemail.Whatisacomputer?Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.DoyouknowwhoIam?abacusRiddles(谜语)Icanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.DoyouknowwhoIam?laptopPDAPersonalDigitalAssistantIamsosmallinsizethatIcanfitinyourhand.Iusuallyhaveasmallscreenusuallybiggerthanadigitalphone,howeversmallerthanthesmallestlaptop,I’magreatwaytostoretelephonenumbers,accesstheinternet,makecalculations,andsoon.DoyouknowwhoIam?Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculatorIamverybig.Scientistsusemetosolvesomemathematicalproblems.hugecomputerDoyouknowwhoIam?robotI’mamachinethatworksautomatically.Icandoawidevarietyoftasks,especiallysuitablefordoingjobstooboring,difficult,ordangerousforhumanbeings.DoyouknowwhoIam?PCPersonalComputerI’masmall,relativelyinexpensivecomputerdesignedforanindividualuser.I’mbasedonthemicroprocessortechnology.Athome,peopleusemetosurftheInternetandplaygames.DoyouknowwhoIam?1.Theycanbeusedforcalculating.2.Theycandealwithmathsproblems.3.Theyareourfriends.4.Theyareusefulandhelpful.Inpairsdiscusswhattheyhaveincommon.DiscussionCanyougiveustheEnglishnamesofacomputercomponents(组件)?Tips:1.Wecanuseacomputerto…2.Itismadeupofsomeparts,suchas…keyboard键盘mouse鼠标monitor显示器screen屏幕speaker音响host主机componentsofacomputermainboardCPU(centralprocessingunit)floppydiscDVDROMUSBflashdiskprinterscannermodemscreenkeyboardmousemonitorDVD-ROMharddisk1.thepartofthecomputerthatlookslikeatelevision2.thepartofthemonitorthatyoulookat3.somethingyouusetoclickonthings(files,etc.)4.thepartofthecomputerthatyoutypeon5.thepartofacomputerthatstoresinformation6.thepartofcomputerthatwecanputaCDinMatchPDAabacuscalculatorhugecomputerPClaptopWhat’snext?Canyoutellthedevelopmentofcomputers?robot有人预测现行的计算机体系将在2010年遇到无法逾越的障碍。但从目前的技术发展趋势来看，新技术不断被应用到计算机行业，Moore定律至少到2010年仍会有效，届时计算机的基本构造应不会有大的改变。Whatdoyouthinkwillbethenextdevelopment?另一方面，在沿着传统框架发展高性能计算机的同时，一些新型的计算机体系也已被提出，有些已从根本上突破了冯·诺依曼计算机体系与电子技术的局限，这方面的工作得到了多方面的重视。高速超导计算机激光计算机分子计算机量子计算机DNA计算机神经元计算机生物计算机未来高性能计算机Doyouknowinwhatwayscomputersareusedtoday?Workoutalistandcompareitwithyourpartner.searchfor…seemovieslistentomusicreadbooksandmagazinessendemailstofriendsdownloadmusicandfilmsbuythingsonlineplaygamesonthecomputerdrawpictureslookatphotographsonthecomputeruseacomputerforschoolworktakepartinchatgroupsBesidescomputer,whatelsecanwegetinformationfrom?1.HavethecomputerandInternetbecomepartofyourlife?2.Howhascomputerchangedourlife?DiscussionHomework1.Writeapassagetotalkaboutthefunctionsofacomputerorarobotinabout80words.2.Previewthereading:WHOAMI?