高中英语必修二unit3课件 24页

\nGuess!Atoy?Ahandbag?Computers\nIamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.DoyouknowwhoIam?abacusGuessmore:\nIamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculator\nIcanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.notebookcomputerDoyouknowwhoIam?\nAhugecomputerAPCthehistoryofthecomputerlaptop(手提电脑)PDA(掌上电脑)Caculator计算器abacus\nWhoamI?\nSkimming:Gooverthestorytofindoutwhothespeakeris.Writedown3sentencestosupportyouridea.Itisacomputer.●IwasabletosharemyknowledgewithothersthroughtheWorldWideWeb.●”MyrealfatherwasAlanTuring....”●IwasbuiltasanAnalyticalMachinebyCharlesBabbage.”\n1642TheAnalyticalMachinewasmadebyCharlesBabbage.19361940sThefirstfamilyofcomputerswasconnectedtoeachother.1970snowTimelineThecomputerbeganasacalculatingmachine．1822AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork．Computershadgrownaslargeasaroom.1960sComputerswereusedinofficesandhomes．Computerswereusedinofficesandhomes.Scanning:\nTrueorFalseAlanTuringbuiltanAnalyticalMachinetosolveanymathematicalproblems.Peoplebegantorealizethatthecomputergotclevererandquickerwithtimepassing.Thecomputerbegantoservethehumanracesinceitwasbroughtintopeople’shomes.Sincethe1970s,thecomputerwasusedbypeoplearoundtheworldthroughtheInternet.5.Thelargerthecomputeris,themorememoryithas.FTFTFauniversalmachineitsbirthIbecamesmallandthinbutIgotclevererandcleverer,quickerandquicker.AndmymemorybecamesolargethatIcouldn’tbelieveit!correctthewrongsentences\n1.Choosethebestanswers1)What’sthemainideaofthetext?A.Thecomputerwantstofind“whoheis”.B.Thefunctionalchangeofthecomputer.C.Thecomputerbecomespopulararoundtheworld.D.Thehistoryofthecomputer.Comprehending:\n2)Whatcanyouinferfromthetext?A.Thecomputerhasartificialintelligence.B.Thecomputerchangesalotovertheyears.C.Thecomputerwasnotconnectedbyanetworkuntilintheearly1960s.D.Nowthecomputercanonlybeusedtodealwithinformation.\nQ1:HowdidthecomputerworkasanAnalyticalMachine?Thecomputerfollowedinstructionsfromcardswithholes.2.Questions\nQ2:Inhowmanywaysdowesaythecomputerchanged?Whatarethey?Size:Intelligence:Speed:Function:People’opinion:smallerquickercleverercalculating----dealingwith…,communicatingwith…clever&useful\n1642began…calculating…France1822TheAnalyticalMachine…CharlesBabbage1936AlanTuring…wrote…built…1940sAslargeasconnected…share…talk…1970sBecomeveryimportantin…nowdealwith…communicate…1960sConsolidation:Retelling\n1Amonitoris2Thescreenis3Akeyboardis4Amouseis5ACD-ROMis6Aharddiskis(a)thepartofacomputerthatstoresinformation.(b)thepartofthecomputerthatyoutypeon.(c)thepartofthecomputerthatlookslikeatelevision(d)somethingyouusetoclickonthings(files,etc.).(e)thepartofthemonitorthatyoulookat.(f)aseparatediskthatcontainslotsofinformation.Matchthewordswiththeirmeanings.\nInternet1.Whatcanthecomputerbeusedfor?Task2.Discussion\nschoolworkgamesemailsmusicandfilmschatinformationphotosshoppingOurlifehaschanged!\npalmtopsmallerdesktopconvenientlaptopWhataretoday'ssmallercomputerslike?\n2.Whataboutinthefuture?virtualkeyboards虚拟键盘Nose-topkeyboard-vest\nrobotWhataboutinthefuture?\n\nSupposeyouareareporter.NowyouareinterviewingMr./MissComputer.Samplequestions:Whatdoyouliketoeat?Whatareyourhobbies?Whatisyournewestfunction(功能)?Canyousaysomethingaboutyourfutureplan?etc.……Task3.Role-play\nHomework:Reviewthepassage2.DoEx.1-3onP19-20.3.ReadthestoryaboutBillGates.