高中英语 Unit3 Computers using language课件 新人教版必修2.ppt

unit3,usinglanguage,_,importantvocabularycalculate,calculator,pc,notebook,common,analytical,simple,simple-minded,technology,technological,revolution,universal,mathematical,artificialintelligence,anyway,totally,network,truly,race,birth,it,advantage,disadvantage,type,disagree,choice,material,personally,create,coach,move,arise,brain,mop,wanderincommon,inonesopinion,goby,sothat,dealwith,humanrace,inaway,makeup,afterall,withthehelpof,watchover,listentoaconversationaboutdifferentkindsofinformationtechnologyorit.payattentiontotheadvantagesanddisadvantagesofeachone.discusstheadvantagesanddisadvantages.,trytousethefollowingexpressionsinyourdiscussion.,theadvantage/disadvantageisidontlikethisonebecausewhatisyourreason?inmyopinionibelievethativedecidedithinkthisoneisbetterbecauseletsmakeourdecision.,lm:whatareyoudoingdave?d:imreadingaboutinformationtechnology.lm:youmeanthingslikecomputers?inmyopiniontheyresoboringtoreadabout.theyreonlygoodtouse.d:buttheyrejustonekindofit.lm:really?sowhatelseispartofit?,listeningtextliming=lmdave=d,d:wevehaditforalongtime.books,radiosandtvsarealsokindsofit.lm:oh.ineverthoughtofthatbefore.booksareawonderfulwayforustogetinformation.,d:yeah,ibelievethattoo.theyarecheapandeasytotakewithyoubutsometimestheinformationisoutofdate.lm:iagree.theworldischangingsofast.butinmyopinionlisteningtosportsontheradioisbetterthananythingelse.sometimesialsolistentoenglishprogrammesontheradio.buttheyspeaksofastandsometimesitsdifficulttounderstandeverything.,d:yes.ialsolistentoenglishontheradiobutitseasiertofollowontvbecauseyoucanalsoseewhatisgoingon.sometimesitismoreinterestingtowatchsportsontvthanjustlistentothemontheradio.,lm:idisagreebecauseyougetsuchalotofinformationonthetechnicalaspectsofagameontheradio.youdontgetthatontv.butistillthinkthatthecomputeristhebestkindofit.youcanwatchafilmonit,writetofriends,getinformation,andfindoutwhatisgoingonintheworld.,d:iknow,butitisalsothemostexpensiveanditistoobigtocarrywithyoueverywhere.alsotheinternethasnobodytocheckwhetherthaninformationyoufindthereiscorrect.soyouhavetobecareful.lm:well,isupposeallkindsofithavebothdisadvantagesandadvantages.,youcanbothlistenandwatch.,youcanfindinformation.,youcanlistentoenglish.,youcangetinformation.,youcannotwritetofriends.,itisveryexpensive.,youcannotwatchafilm.,sometimesitisoutofdate.,reading优势;有利条件thereareseveraladvantagesincitylife.takeadvantageof利用betoyouradvantage对有利disadvantagen.缺点,劣势;不利条件,languagepoints,2.type1)n.类型thisisanewtypeofmachine,withlotsofmetersonit.,2)v.打字willyoupleasetypethisletterforme?,3.disagree(vi)常与with连用,(食物,天气等)不适合muttondisagreeswithme.,不同意;意见不同idisagreewithyouaboutthis.,不一致;不符hisreportdisagreeswiththefact.,4.personallyadv.就自己而言;就我个人来说shedidntliketheplan,butpersonallyiseenothingwrongwithit.,person(n)-personal(adj.)-personally(adv.),5.ina/oneway在某种程度上,从某种意义上说,inaway,hisenglishhasimproved.,与inaway同义的词组有inoneway和insomeways。容易与之混淆的词组是intheway意为“造成阻碍”，请比较：inaway,ilikethisnewtextbookverymuchimafraidyourbikeisintheway,soyoumadeitafterall!afterall,whatdoesitmatter?,6.afterall毕竟;到底;终究,sheshouldhaveofferedtopayshesamillionaire,afterall,7.withthehelpof在的帮助下withthehelpoftheteacher,ihavemaderapidprogressinmyenglishstudy.,8.watchover看守;监视;照看theywerewatchedoverbythreepolicemen.,watchout(for)当心;注意undertheclosewatch在严密的监视下watchforsb./sth.观察等待keepawatchon监视,speaking,insmallgroups,discusshowtodesignyourownandroid.thefollowingquestionscanhelpyou.,1.whatwouldyoulikeittolooklike?2.whataresomeofthethingsyouwouldlikeittodo?3.doyouwantittobelikeamanorawoman,orneither?4.howmuchwoulditcost?,ithinkthatinmyopinionibelievethatwhatsyourreason?ihaddecidedthat,a:whatkindofrobothaveyoudecidedtomake?b:ivedecidedthatweshouldhaveahomeworkandroid.itcoulddoallourworkafterclassandleaveusmoretimetodofootball,sampledialogue:,b:inmyopinion,itshouldhavefourarmstocarrythebooks,alargeheadtorememberallthelessonsandaprintertowriteouttheanswerswhatdoyouthink?,a:ok.butwhatdoyouthinkitshouldlooklike?,a:well,thatsoundssensible.perhapsitcouldalsoputalltheexercisesintospeciallymarkedboxesforeachsubjectsowecouldfindthemquickly.whataboutputtingthatinitsstomacharea?b:doyouwantittobeamanorawoman?youcanchoose,a:ivedecideditshouldbeagirlb:whatsyourreason?a:girlsaresohard-workingb:soundsgoodtome!letsdrawitnow!,speakingtheinstructionsanddataarecalledsoftware.,allgeneral-purposecomputersrequirethefollowinghardwarecomponents:,memory:enablesacomputertostore,atleasttemporarily,dataandprograms.,massstoragedevice:allowsacomputertopermanentlyretainlargeamountsofdata.commonmassstoragedevicesincludediskdrivesandtapedrives.,inputdevice:usuallyakeyboardandmouse,theinputdeviceistheconduitthroughwhichdataandinstructionsenteracomputer.outputdevice:adisplayscreen,printer,orotherdevicethatletsyouseewhatthecomputerhasaccomplished.,centralprocessingunit(cpu):theheartofthecomputer,thisisthecomponentthatactuallyexecutesinstructions.,inadditiontothesecomponents,manyothersmakeitpossibleforthebasiccomponentstoworktogetherefficiently.forexample,everycomputerrequiresabusthattransmitsdatafromonepartofthecomputertoanother.,computerscanbegenerallyclassifiedbysizeandpowerasfollows,thoughthereisconsiderableoverlap:,personalcomputer:asmall,single-usercomputerbasedonamicroprocessor.inadditiontothemicroprocessor,apersonalcomputerhasakeyboardforenteringdata,amonitorfordisplayinginformation,andastoragedeviceforsavingdata.,workstation:apowerful,single-usercomputer.aworkstationislikeapersonalcomputer,butithasamorepowerfulmicroprocessorandahigher-qualitymonitor.minicomputer:amulti-usercomputercapableofsupportingfrom10tohundredsofuserssimultaneously.,mainframe:apowerfulmulti-usercomputercapableofsupportingmanyhundredsorthousandsofuserssimultaneously.supercomputer:anextremelyfastcomputerthatcanperformhundredsofmillionsofinstructionspersecond.,什么是计算机？一个可编制程序的机器。计算机的二种主要特性是:它响应一个具体的指令为一个明确定义的方式.现代计算机是电子和数字化的。现有机器-电线，晶体管和电路-被称为硬件；指令和数据被称为软件。所有通用计算机要求以下硬件元件:物理内存：使计算机,至少临时地,存放数据和节目。,一个可编制程序的机器。计算机的二种大容量存储器设备:允许计算机永久地保存很多数据。大容量存储器设备普遍包括驱动器和磁盘驱动器。输入设备:通常是键盘鼠标,输入设备是数据和指令进入计算机的途径。输出设备:显示器、打印机,或其他可以让您看到计算机完成了什么的设备。中央处理单元(cpu):计算机的心脏部分，是实际上执行指令的部件。,除了这些部件,使得许多其他的基本部件一起实现高效率地工作成为可能。例如,要求一个巴士传送一个计算机上的一部分数据到另外的巴士上去.电脑根据体积和重量大致分类如下,虽然有有可能的交叉：个人计算机（pc机）:一个小的、单用户的电脑微处理器.除微处理器之外,一台个人计算机有一个键盘用来输入数据,一个显示器用来显示信息,还有存贮设备用来保存数据。,工作站:一个强大的、单用户计算机.就是一台个人计算机,但它有个更强大的微处理器和更优质的显示器。小型机:多用户电脑，可支持10到上百用户同步.主机:一个强大的多用户电脑，可支持多用户或成百上千的用户同步.大型机:一个非常快的计算机，能每秒响应亿万个指令.,discusstogetherandthendecidewhichkindofcomputeryouwouldliketobuyforyourschool.,discussion,a:lookatthiscomputer.ithasbeengivenasmallermonitor.b:thatsgoodbecausewecanthenhavemorecomputersintheschool.doesithavetheinternetaswell?,sampledialogue:,a:youcanhaveitfittedbutitisnotincludedintheprice.nowlookatthisone.bothasmallmonitorandaflatscreenhavebeenincluded.itcanbejoinedtotheinternetstraightawayandithasbeengivenalargeharddisccapacity.thatsgoodofcourse.,b:doyouthinkweshouldbuylaptopcomputersforourschool?theyaremoreusefulbecausetheycanbemovedfromroomtoroom.theschoolwouldnotneedtoprovideaspecialroomforcomputers.theyarealsosmallerandcanbestoredawaymoreeasily.buttheyhaveprovedtobemuchmoreexpensivethanapersonalcomputer.,a:yes,thatiswhytheprincipaltoldmewecouldnotbuythem.hewouldnotbeabletoaffordenoughfortheschoolsowehadbetterlookatthepersonalcomputers.thisoneisveryfastandusesdiscswhichcanstoremoreinformation.alsoitisneithert