教学课件：必修 2—unit 3

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1、必修2-Unit3Page18LanguagePoints：(Translation)1.havesth.incommonwith…：和…有相同之处beincommonwith…：和…有相同之处2.compare…with…：与…相比较3.acalculatingmachine：计算器4.Ittooknearlytwohundredyears(todosth.)：花费时间做某事5.bebuiltasananalyticalmachine：被制作(组装)为一台分析机6.cardswithholes：有孔的卡片7.atechn

2、ologicalrevolution：技术革命8.fromthenon：从那时起overtime：随着时间的过去，经过一段时间，一直以来/astimegoby随着时间的推移9.asaresult：因此，作为结果asaresultof…：因为…，作为…的结果10.sothat：(1)以至于…(结果状语从句)；(2)为了…(目的状语从句)somuchthat…(结果状语从句)solargethat…(结果状语从句)(1)so…that：以至于…(结果状语从句)(2)inorderthat/inordertodo…/soasto

3、…：为了…(目的状语从句)11.sharesth.withsb.：和…共享…sharein…：分享…，分担…12.providesb.withsth.：提供给某人什么东西13.befilledwith/fill…withsth.：充满fillin：填写；填充14.thehumanrace：人类/ahumanbeing：一个人必修2-Unit3Page19Comprehending：1.Readthepassageandfinishthetimelinebelow.(1)1642:Thecomputerbeganasacal

4、culatingmachine(2)1822:TheanalyticalmachinewasmadebyCharlesBabbage(3)1936:Thecomputergrewrapidlybothinsizeandinbrainpower(4)1940s:Thecomputerhadgrownaslargeasaroom(5)1960s:Thefirstfamilyofcomputerswasconnectedtoeachother(6)1970s:Computerswereusedinofficesandhomes(

5、7)Now:Computersconnectpeopleallovertheworldtogether2.Readthepassageagainandcompletethechartbelow.Paragraph1Paragraph2Paragraph3TopicOvertimeIhavebeenThesechangesonlySincethe1970smanynew8sentencechangedquitealotbecomepossibleasmymemoryimprovedapplicationshavebeenfo

6、undformeSupportingdetails1.calculatingmachine2.analyticalmachine3.universalmachine4.PC5.laptop1.tubes2.transistors3.chips4.network5.WorldWideWeb1.communications2.finance3.trade4.robots5.mobilephones6.medicaloperations7.spacerockets8.providingalifeofhighquality必修2-

7、Unit3Page20Discoveringusefulwordsandexpressions：1.Findthewordorexpressionforeachofthefollowingmeaningfromthetext.(1)revolution:completechangeinwaysofthinking,working,etc(2)network:connectedcomputersystem(3)simplify:tomakethingseasier(4)calculate:tofindtheanswerusi

8、ngnumbers(5)mobile:abletobemovedeasilyfromplacetoplace(6)solve:toworkouttheanswertoaproblem(7)explore:totravelaroundanareatofindoutaboutit(8)totally:com