英语必修二第三单元课文.ppt

《英语必修二第三单元课文.ppt》由会员上传分享，免费在线阅读，更多相关内容在PPT专区-天天文库。

1、Unit3ComputersReadingSendorreceiveemails……COMPUTERUnit3Computerskeyboardmousemonitorscreenspeakerhostcomputercamera1234567WhatisitinEnglish?CPU(centralprocessingUnit)中央处理器WhatisitinEnglish?Mainboard(主板)WhatisitinEnglish?harddisc硬盘WhatisitinEnglish?displayca

2、rd显卡DVDROMDigitalVersatileDiscReadOnlyMemory数字通用光盘WhatisitinEnglish?Thefirstcomputer?ThefirstcalculatingmachinewasinventedbyPascalinFrancein1642.Intheearly1960s,peoplecouldcommunicatewitheachotherthroughWorldWideWeb.WhoamI?Reading:Ibeganasacalculatingmachin

3、einFrancein1642.AlthoughIwasyoungIcouldsimplifydifficultsums.IdevelopedveryslowlyandittooknearlytwohundredyearsbeforeIwasbuiltasananalyticalmachinebyCharlesBabbage.AfterIwasprogrammedbyanoperatorwhousedcardswithholes,Icould"think"logicallyandproduceananswer

4、quickerthananyperson.Atthattimeitwasconsideredatechnologicalrevolutionandthestartofmy"artificialintelligence".In1936myrealfather,AlanTuring,wroteabookabouthowIcouldbemadetoworkasa"universalmachine"tosolveanydifficultmathematicalproblem.Fromthenon,Igrewrapid

5、lybothinsizeandinbrainpower.Bythe1940sIhadgrownaslargeasaroom,andIwonderedifIwouldgrowanylarger.However,thisrealityalsoworriedmydesigners.Astimewentby,Iwasmadesmaller.FirstasaPC(personalcomputer)andthenasalaptop,Ihavebeenusedinofficesandhomessincethe1970s.O

6、vertimeIhavebeenchangedquitealot.Firstitwasstoredintubes,thenontransistorsandlateronverysmallchips.AsaresultItotallychangedmyshape.AsIhavegrownolderIhavealsogrownsmaller.Overtimemymemoryhasdevelopedsomuchthat,likeanelephant,IneverforgetanythingIhavebeentold

7、!AndmymemorybecamesolargethatevenIcouldn'tbelieveit!ButIwasalwayssolonelystandingtherebymyself,untilintheearly1960stheygavemeafamilyconnectedbyanetwork.IwasabletosharemyknowledgewithothersthroughtheWorldWideWeb.Thesechangesonlybecamepossibleasmymemoryimprov

8、ed.Ihavebecomeveryimportantincommunication,financeandtrade.Ihavealsobeenputintorobotsandusedtomakemobilephonesaswellashelpwithmedicaloperations.IhaveevenbeenputintospacerocketsandsenttoexploretheMoonan