高中英语 Unit 3 Computers课件 新人教版必修.ppt

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1、Unit3ComputersPeriod2Readingrobot1.rmvbEarliestcomputerNowadayscomputerHowdoesitchange?WhoamI?Skimming:Itisacomputer.1.whoisthespeaker?2.What’sthepassageabout?It’saboutthehistoryofcomputer.Readthepassageagain.Findthetopicsentenceofeachparagraphandthesupportingdetails.Paragraph1:OvertimeIhavebeench

2、angedquitealot.1.calculatingmachine2.analyticalmachine3.universalmachine4.laptopSkimming:Q1:HowdidthecomputerworkasanAnalyticalMachine?Thecomputerfollowedinstructionsfromcardswithholes.Paragraph2:Thesechangesonlybecamepossibleasmymemoryimproved.1.tubes2.transistors3.chips4.network5.WorldWideWebPar

3、agraph3:Sincethe1970smanynewapplicationshavebeenfoundforme.1.communications2.finance3.trade4.robots5.mobilephones6.medicaloperations7.spacerockets8.providingalifeofhighquality2.Whichsentencecanbereplaced(代替）inthepassagebythefollowing?Later,IbecomesocleverthatIcanremembereverythingyoutoldme.Overtim

4、emymemoryhasdevelopedsomuchthat,likeanelephant,IneverforgetanythingIhavebeentold.SummaryAtopicsentencesetsoutthemainideaofaparagraph.Atopicsentenceisusuallythefirstorlastsentenceofaparagraph.1642TheAnalyticalMachinewasmadebyCharlesBabbage.19361940sThefirstfamilyofcomputerswasconnectedbyanetwork.19

5、70snowTimeThecomputerbeganasacalculatingmachine．1822AlanTuringwroteabooktodescribehowcomputerscouldbemadetoworkandbuilta“universalmachine”．ComputershadnewtransistorsandbecameSmallandthin.1960sComputerswerebroughtintopeople'shomes．Computersconnectpeopleallovertheworldtogether.Whatistheorderofthetex

6、t?Q3:howdidcomputerchangeinitssize,intelligence,speed,function?Andhowaboutpeople’sopinion?Size:Intelligence:Speed:Function:People’sopinion:smallerquickerclevererdealingwith…,communicatingwith…clever&usefulcalculatingsimple-mindedTrueorFalseAlanTuringbuiltanAnalyticalMachinetosolveanymathematical

7、problems.Peoplebegantorealizethatthecomputergotclevererandquickerwithtimepassing.Thecomputerbegantoservethehumanracesinceitwasbroughtintopeople’shomes.Sincethe1970s,thecomputerwasusedbypeoplearoundtheworldthrough