高中英语必修2_Unit_3_Computers_(人教新课标)

Book2Unit3ComputersbackkeyboardmousemonitorscreenspeakerhostcomputerHowmuchdoyouknowaboutacomputer???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Heavy!Difficult!Hard!Tired!Lookatthepicturesandusesomeadjectivestodescribeher/hisfeelings.Free!Easy!Fast!Quick!WarmingupThedevelopmentofcomputerP17Lookatthepictures.Talkabouteachofthem.Discusswhattheyhaveincommon.abacuscalculatorhugecomputerPClaptopPDArobotabacuscalculatorhugecomputerPClaptopPDArobotYouareaskedtousethefollowingexpressionsinyourdiscussion.Ithinkthat…Inmyopinion…Ibelievethat…Whydoyouthinkso?What’syourreason?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.1.What’sthemainideaofthispassage?A.ThedevelopmentofcomputersB.ThedevelopmentanduseofcomputersC.Amachinewhichissimple-mindedD.ComputersmayreplacehumanbeingFast-readingB.Thedevelopmentanduseofcomputers()①IbeganasacalculatingmachineinJapanin1642.()②In1936,Igrewrapidlybothinsizeandinbrainpower.()③Astimewentby,Iwasmadebigger.()④Sincethe1970smanynewapplicationshavebeenfoundforme.2.TrueorFalseFTFTTimeEvents16421822TheanalyticalmachinewasmadebyCharlesBabbage.Thecomputergrewrapidlybothinsizeandinbrainpower.1940sThefirstfamilyofcomputerswasconnectedtoeachother.1970snowComputersconnectpeopleallovertheworldtogether.Further-readingThecomputerbeganasacalculatingmachine.1936Thecomputerhadgrownaslargeasaroom.1960Computerswereusedinofficesandhomes.FillintheblanksI,the_________,wasacalculatingmachinein1642in_______.In1936,Ibecamea“_________machine”to_____anymathematicalproblem.Sincethe1970sIhavebeenusedfirstasa___andthenasa_______inofficeand______.Manychangedhavehappenedtomy____,somy_______totallychanged.Ihavebeenwidelyusedinmanyfields,Ihavealsobeenputintorobotsto_______theMoonandMars.computerFranceuniversalsolvePClaptophomessizeshapeexploreParagraph1Paragraph2Paragraph3TopicsentenceSupportingdetailsOvertimeIhavebeenchangedquitealotThesechangesonlybecomepossibleasmymemoryimprovedSincethe1970smanynewapplicationshavebeenfoundforme•calculatingmachine•analyticalmachine•universalmachine•pc•laptop•tubes•transistors•chips•network•worldwideweb•communications•finance•trade•robots•mobilephones•medicaloperations•spacerockets•providingalifeofhighqualityWhenyoumeetsomeoneforthefirsttime,doyouaskfortheirASL?DoyouLOLiftheycomeoutwithsomethingfunny,andsayCUL8erwhenyoufinishtheconversation?IfyouknowwhatI’mtalkingabout,thenyouareprobablyalreadyauserofInstantMessaging,orIM.TheideabehindIMissimple.Aprograminyourcomputertellsyouwhenafriendisonline.Youcanthensendamessagetoyourfriend,whocantypeareplyinstant.Todothis,youneedanIMprogram.Theadvantageovere-mailisthatwithInstantMessagingyouknowyou’relikelytogetareply.IMisalreadyhugelypopularintheUSA,wherepeoplespendfivetimesmoretimeonlinethaninEurope.However,IMisstartingtotakeoffintheUK,withover3000peoplesigninguptoMSNMessengereveryday.AnewwaytocommunicateWhilethepluspointsofIMareobvious,thereisoneveryimportantdisadvantage:youcanonlycontactsomeoneonthesamenetworkasyou.IfyourfriendisusingAIM,andyouareusingMSN,youcannottalktoeachother.ThismakesIMlessusefulthanitshouldbe.Imaginewhatifyoucouldn’tsendane-mailfromhotmailtoyahoo.However,itseemsthatthingswillchangesoon.Ingeneral,thefuturelooksbrightforIM.Lotsofprogramsalsoallowyoutohavevoiceconversations,videoconferences.Thismeansyoucanseetheotherpersonusingawebcam,andyoucanexchangepictures,musicandotherfiles.So,perhapswe’llallsoonbeaskingsomeone’sage,sexandlocation(ASL),andlaughingoutloud(LOL)whentheysaysomethingfunny.Seeyoulater(CUL8er)!back