高一英语人教课标必修2-unit3-reading课件

Unit3ComputersIamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculating

inthepast,butnowIamabitlonelybecausetheydon’tlikemenow.Theabacus

playedaveryimportant

part

incalculatinginancientChina.WhoamI?abacusIamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemetosolvemathematicalproblems.Thecalculatoriswidelyusedinbusinessandfinance.WhoamI?

calculatorIcanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailsandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.WhoamI?Thelaptopservesasadevotedfriendandhelperofthehumanrace.laptoptopicsentenceofeachparagraphPara1:OvertimeIhave

beenchangedquitealot.Para2:ThesechangesonlybecamepossibleasmymemoryimprovedPara3:Sincethe1970smanynewapplicationshavebeenfoundforme.Thepassageisaboutthe____________andnew__________________ofthecomputer.

developmentWhoamI?computer

applicationsOvertimeIhavebeenchangedquitealot.Para1acalculatingmachineananalyticalmachineauniversalmachinefunction(功能)SimplifydifficultsumsThinklogicallyandproduceananswerquicklySolvedifficultmathematicalproblemsgrowaslargeasaroombeusedinofficesandhomesfirstasa____thenasa_______PC

laptop

beganaswasbuiltas

wasmadetoworkas

fromthenongrewrapidlybothinsizeandinbrainpower1642182219361940sastimewentby1970showeverTheComputerMuseumHello,everyone!Welcometothecomputermuseum.Now,letmeintroducetoyou.Overtime,thecomputerhasbeenchangedquitealot.1642:

1822:From1936on:Bythe1940s:

Astimewentby:Sincethe1970s:

beganas…Simplify…wasbuiltas…Think…andproduce…grewrapidlybothin…hadgrownas…as…

wasmade…first…then…

hasbeenusedin…thedevelopmentofthecomputerPara2Thesechangesonlybecamepossibleasmymemoryimproved.

Itwasstoredtube

transistorchipAsaresult,Itotallychangedmy_________.

shape

Intheearly1960s,myfamilywereconnectedbya________.SoIwasabletosharemyknowledgewithothersthroughthe__________________.networkWorldWideWeb

result?shape?thecomputer’sfamily？Iwanttoknowsomethingaboutthememoryofthecomputer.PairworkA:Wherewasthememorystored?B:First…then…later…A:…A:Wherewasthememorystored?B:Firstitwasstoredintubesthenontransistorsandlateronverysmallchips.A:What’stheresultofthat?B:Asaresult,thecomputertotallychangeditsshape.A:Whendidthecomputerhaveafamily?B:Intheearly1960s,computerswereconnectedbya

network.Para3c______________f______________t_____________r____________m_________p________m__________

o__________

s________

r________ommunicationinanceradeobotsobilehonesedicalperationspaceocketsMygoalis__________________________________________________

toprovidehumanswith

alifeofhighquality.AdevotedfriendandhelperofhumanraceSincethe1970smanynewapplicationshavebeenfoundforme.DiscussionShouldhighschoolstudentssurftheinternet(上网)?addictedto（沉迷）AdevotedfriendandhelperPeoplesaycomputershavemoreadvantagesthandisadvantages.Doyouthinkso?advantagesdisadvantagesABSuchas:Sendane-mailItisbadforyoureyesDownload(下载)informationSeeamovieorwatchTVPlaycomputergamesBuygoodsyouwant

Dosomechattingadvantages-------improvepeople'sabilityofthinking

TooexpensiveAddictedto（沉迷）playinggames

-------disadvantagesPeoplecan’twriterightChineselettersNotarealworldThecomputercanbeusedto:playcomputergameslistentomusicwatchmoviescommunicatewithourfriendssearchforusefulinformation(Google,Yahoo!)buythingsIlike(eBay,Taobao)typemyhomeworkdrawpicturesWhatcanthecomputerbeusedtodo?Discussiondoharmtooureyesawasteoftimeandmoneyinfluenceourstudythereissomethingdangerousonline…advantagesdisadvantages

AdvantagesanddisadvantagesoftheInternetWiththedevelopmentoftechnology,theInternetisplayingamoreandmoreimportantpartinourdailylife.Atfirst,…Wha