高中英语Unit3computers课件新人教版必修2

Unit3Computersperiod1warmingupAtoy?Ahandbag?ComputersRiddles(谜语):Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.

DoyouknowwhoIam?abacusRiddles(谜语):Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculatorRiddles(谜语):Icanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.laptopDoyouknowwhoIam?Riddles(谜语):abacushugecomputerPCcalculatorlaptopPDAWhat’snext?Whatdotheytellyouaboutthedevelopmentofcomputers?robotHowmuchdoyouknowaboutacomputer???GivetheEnglishnameofthefollowingpicturesofthecomputercomponents(组件)WhatisitinEnglish??Mainboard(主板)WhatisitinEnglish??CPU(centralprocessingUnit)中央处理器WhatisitinEnglish??harddiscWhatisitinEnglish??keyboard(键盘)WhatisitinEnglish??monitorscreenWhatisitinEnglish??mouse鼠标DVDROMTIPSSomewordsontheInternet:netizen

网民Netsurf网络漫游computervirus计算机病毒cyber计算机的，网络的browse浏览cyberspace网络空间scroll滚动显屏accesscharge接入费cursor光标BBS公告板服务

hacker黑客chatroom聊天室click点击

cyberbar网吧Computerscanbeusedas…..typewriterprojectorvideogameplayerdrawingboard

ConclusionThereisnodoubtthatcomputerhastwosides,too.Ifwemakegooduseofit,itwillmakeourlivesmorecolorfulandconvenient.Butdon’tloseyourselfinplayingcomputers.Justremember:Keepfit,studywellandworkhard.1642:Thecomputerbeganasacalculatingmachine.1822:TheanalyticalmachinewasmadebyCharlesBabbage.1936:Thecomputergrewrapidlybothinsizeandinbrainpower.1940s:Thecomputerhadgrownaslargeasaroom.1960s:Thefirstfamilyofcomputerswasconnectedtoeachother.1970s:Computerswereusedinofficesandhomes.now:Computersconnectpeopleallovertheworld.Paragraph1Paragraph2Paragraph3TopicsentenceSupport-ingdetailscalculatingmachine

tubescommunicationsfinanceanalyticalmachine

universalmachine

PC

laptop

transistors

chips

networkWorldWideWeb

trade

robots

mobilephones

medicaloperations

spacerobotsOvertimeIhavebeenchanged