人教版高中英语-必修二-Unit3-《Computers-----Warming-up》-教学教学教案.ppt

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1、Unit3ComputersWarmingup高一人教新课标版必修二abacus1.Lookatthesepictures.Inpairsdiscusswhattheyhaveincommon.Anabacusisanancienttoolusedforcounting.TheabacushasbeeninexistenceinChinasincethesecondcenturyBCuntilnow,althoughtheoldestcountingboardshavebeenfoundinfourthcenturyBCRome.AcalculatorAcalculatoris

2、anewcalculatingmachinewhichcansolvealargenumberofmathematicalproblems.HugecomputerThefirstelectroniccountingmachineincontinentalEurope.ItwasbuilttosolvesomemathematicalProblems.ThefirsttasksweresolvedonJanuary,4,1951.Butitistoobig.APC/desktopAPCisapersonalcomputerwhichcansolveallkindsofprobl

3、emsandisusedwidelynow.Anotebookcomputerisakindofusefulcomputerwhichcanbetakenconvenientlylikeanotebook.Alaptop/notebookcomputerPersonalDigitalAssistantAverysmalllightcomputerthatyoucancarrywithyou,andthatyouusetostoreinformationsuchastelephonenumbers,addresses,andappointments.SomePDAscansend

4、andreceiveemail,andconnecttotheInternet.RobotRobotisamechanicaldevicethatsometimesresemblesahumanandiscapableofperformingavarietyofcomplexhumantasksoncommandorbybeingprogrammedinadvance.Discusswhattheyhaveincommon?Youareaskedtousethefollowingexpressionsinyourdiscussion.Ithinkthat…Inmyopinion

5、…Ibelievethat…Ithinktheyallcancalculatesomething.Theycandealwithsomemathproblems.Ibelievethattheyareourgoodfriendsinourdailylife.Wecannotfinishourworkquicklywithoutthem.Inmyopinion,theyarebeingusedwidelyandconvenientlyintheworld.Doyouknowinwhatwayscomputersareusedtoday?doinghomeworkdrawingpi

6、cturesplayinggameswatchingmovieschattingwithfriendsgettinginformationlisteningtomusic…analyticalmachine（分析机）laptopcalculatingmachine（计算机器）robotPCuniversalmachine（通用机器）Canyouputtheseinventionsinanorderaccordingtothetimewhentheyappeared?p17Task1:Choosethebestanswer.1.What’sthemainideaofthetext

7、?A.Whatacomputeris.B.WhatacomputerisusedforC.Howthecomputerbecomespopular.D.Thehistoryofthecomputer.D2.“I”inthepassagerefersto_____.A.ATVsetB.AcomputerC.AradioD.Theinternet3.Whenwasthecomputerthebiggest?A.In1642B.In1936C.Inthe1940sD.Inthe1970sBC4.H