高中英语必修2_Unit_3_Computers_(人教新课标)

Book2Unit3Computers,back,keyboard,mouse,monitor,screen,speaker,hostcomputer,Howmuchdoyouknowaboutacomputer?,GivetheEnglishnameofthefollowingpicturesofthecomputercomponents(组件),WhatisitinEnglish?,RAM(随机存储器)(RandomAccessMemory),WhatisitinEnglish?,harddisc硬盘,WhatisitinEnglish?,Powersupply(电源),WhatisitinEnglish?,displaycard显卡,DVDROMDigitalVersatileDiscReadOnlyMemory数字通用光盘,Lookatthepicturesandusesomeadjectivestodescribeher/hisfeelings.,Free!Easy!Fast!Quick!,Warmingup,ThedevelopmentofcomputerP17Lookatthepictures.Talkabouteachofthem.Discusswhattheyhaveincommon.,abacus,calculator,hugecomputer,PC,laptop,PDA,robot,abacus,calculator,hugecomputer,PC,laptop,PDA,robot,Youareaskedtousethefollowingexpressionsinyourdiscussion.IthinkthatInmyopinionIbelievethatWhydoyouthinkso?Whatsyourreason?,Ithinktheyallcancalculatesomething.Itcandealwithsomemathsproblems.,Ibelievethattheyareourgoodfriends.Inoureverydaylife.Wecannotfinishourworkquicklywithoutthem.,Inmyopinion,peopleimproveabacus,makeitmoreusefulandmakeitacomputer.Theyarebeingusedwidelyandconvenientlyintheworld.,AnabacusisanoldcalculatingmachineusedinChinauntilnow.Ahugecomputerisbuilttosolvesomemathematicalproblems.Butitistoobig.Acalculatorisanewcalculatingmachinewhichcansolvealargenumberofmathematicalproblems.APCisapersonalcomputerwhichcansolveallkindsofproblemsandiswidelyusednow.Alaptopisakindofusefulcomputerwhichcanbetakenconvenientlylikeanotebook.,Whatdotheyhaveincommon?,Ithinkthattheyallcancalculatesomething.Itcandealwithsomemathsproblems.,HavethecomputerandInternetbecomepartofyourlife?Whatcanyouusethemtodo?,IusethecomputerorInternetto:,typemyhomeworkdrawpicturesplaygamescommunicatewithmyfriends.gatherrelatedinformationformylessonsbuythethingsIlike,egbooksandclothes.listentomusicwatchmovies.,Whatsthemainideaofthispassage?A.ThedevelopmentofcomputersB.ThedevelopmentanduseofcomputersC.Amachinewhichissimple-mindedD.Computersmayreplacehumanbeing,Fast-reading,B.Thedevelopmentanduseofcomputers,()IbeganasacalculatingmachineinJapanin1642.()In1936,Igrewrapidlybothinsizeandinbrainpower.()Astimewentby,Iwasmadebigger.()Sincethe1970smanynewapplicationshavebeenfoundforme.,2.TrueorFalse,F,T,F,T,Further-reading,Thecomputerbeganasacalculatingmachine.,1936,Thecomputerhadgrownaslargeasaroom.,1960,Computerswereusedinofficesandhomes.,Fillintheblanks,I,the_,wasacalculatingmachinein1642in_.In1936,Ibecamea“_machine”to_anymathematicalproblem.Sincethe1970sIhavebeenusedfirstasa_andthenasa_inofficeand_.Manychangedhavehappenedtomy_,somy_totallychanged.Ihavebeenwidelyusedinmanyfields,Ihavealsobeenputintorobotsto_theMoonandMars.,computer,France,universal,solve,PC,laptop,homes,size,shape,explore,OvertimeIhavebeenchangedquitealot,Thesechangesonlybecomepossibleasmymemoryimproved,Sincethe1970smanynewapplicationshavebeenfoundforme,calculatingmachineanalyticalmachineuniversalmachinepclaptop,tubestransistorschipsnetworkworldwideweb,communicationsfinancetraderobotsmobilephonesmedicaloperationsspacerocketsprovidingalifeofhighquality,Whenyoumeetsomeoneforthefirsttime,doyouaskfortheirASL?DoyouLOLiftheycomeoutwithsomethingfunny,andsayCUL8erwhenyoufinishtheconversation?IfyouknowwhatImtalkingabout,thenyouareprobablyalreadyauserofInstantMessaging,orIM.TheideabehindIMissimple.Aprograminyourcomputertellsyouwhenafriendisonline.Youcanthensendamessagetoyourfriend,whocantypeareplyinstant.Todothis,youneedanIMprogram.Theadvantageovere-mailisthatwithInstantMessagingyouknowyourelikelytogetareply.IMisalreadyhugelypopularintheUSA,wherepeoplespendfivetimesmoretimeonlinethaninEurope.However,IMisstartingtotakeoffintheUK,withover3000peoplesigninguptoMSNMessengereveryday.,Enjoying,Anewwaytocommunicate,WhilethepluspointsofIMareobvious,thereisoneveryimportantdisadvantage:youcanonlycontactsomeoneonthesamenetworkasyou.IfyourfriendisusingAIM,andyouareusingMSN,youcannottalktoeachother.ThismakesIMlessusefulthanitshouldbe.Imaginewhatifyoucouldntsendane-mailfromhotmailtoyahoo.However,itseemsthatthingswillchangesoon.Ingeneral,thefuturelooksbrightforIM.Lotsofprogramsalsoallowyoutohavevoiceconversations,videoconferences.Thismeansyou