高中英语必修二unit3课件

Guess!Atoy?Ahandbag?Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.DoyouknowwhoIam?abacusGuessmore:Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculatorIcanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.notebookcomputerDoyouknowwhoIam?AhugecomputerAPClaptop(手提电脑)PDA(掌上电脑)Caculator计算器abacusWhoamI?Skimming:Gooverthestorytofindoutwhothespeakeris.Writedown3sentencestosupportyouridea.Itisacomputer.●IwasabletosharemyknowledgewithothersthroughtheWorldWideWeb.●”MyrealfatherwasAlanTuring....”●IwasbuiltasanAnalyticalMachinebyCharlesBabbage.”1642TheAnalyticalMachinewasmadebyCharlesBabbage.19361940sThefirstfamilyofcomputerswasconnectedtoeachother.1970snowTimelineThecomputerbeganasacalculatingmachine．1822AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork．Computershadgrownaslargeasaroom.1960sComputerswereusedinofficesandhomes．Computerswereusedinofficesandhomes.Scanning:TrueorFalse1.AlanTuringbuiltanAnalyticalMachinetosolveanymathematicalproblems.2.Peoplebegantorealizethatthecomputergotclevererandquickerwithtimepassing.3.Thecomputerbegantoservethehumanracesinceitwasbroughtintopeople’shomes.4.Sincethe1970s,thecomputerwasusedbypeoplearoundtheworldthroughtheInternet.5.Thelargerthecomputeris,themorememoryithas.FTFTFauniversalmachineitsbirthIbecamesmallandthinbutIgotclevererandcleverer,quickerandquicker.AndmymemorybecamesolargethatIcouldn’tbelieveit!1.Choosethebestanswers1)What’sthemainideaofthetext?A.Thecomputerwantstofind“whoheis”.B.Thefunctionalchangeofthecomputer.C.Thecomputerbecomespopulararoundtheworld.D.Thehistoryofthecomputer.Comprehending:2)Whatcanyouinferfromthetext?A.Thecomputerhasartificialintelligence.B.Thecomputerchangesalotovertheyears.C.Thecomputerwasnotconnectedbyanetworkuntilintheearly1960s.D.Nowthecomputercanonlybeusedtodealwithinformation.Q1:HowdidthecomputerworkasanAnalyticalMachine?Thecomputerfollowedinstructionsfromcardswithholes.2.QuestionsQ2:Inhowmanywaysdowesaythecomputerchanged?Whatarethey?•Size:•Intelligence:•Speed:•Function:•People’opinion:smallerquickercleverercalculating----dealingwith…,communicatingwith…clever&useful1642began…calculating…France1822TheAnalyticalMachine…CharlesBabbage1936AlanTuring…wrote…built…1940sAslargeasconnected…share…talk…1970sBecomeveryimportantin…nowdealwith…communicate…1960sConsolidation:Retelling1Amonitoris2Thescreenis3Akeyboardis4Amouseis5ACD-ROMis6Aharddiskis(a)thepartofacomputerthatstoresinformation.(b)thepartofthecomputerthatyoutypeon.(c)thepartofthecomputerthatlookslikeatelevision(d)somethingyouusetoclickonthings(files,etc.).(e)thepartofthemonitorthatyoulookat.(f)aseparatediskthatcontainslotsofinformation.Matchthewordswiththeirmeanings.1.Whatcanthecomputerbeusedfor?Task2.Discussionschoolworkgamesemailsmusicandfilmschatinformationphotosshoppingpalmtopsmallerdesktopconvenientlaptop2.Whataboutinthefuture?virtualkeyboards虚拟键盘Nose-topkeyboard-vestrobotWhataboutinthefuture?Supposeyouareareporter.NowyouareinterviewingMr./MissComputer.Samplequestions:Whatdoyouliketoeat?Whatareyourhobbies?Whatisyournewestfunction(功能)?Canyousaysomethingaboutyourfutureplan?etc.……Task3.Role-playHomework:1.Reviewthepassage2.DoEx.1-3onP19-20.3.ReadthestoryaboutBillGates.