高中英语必修二unit3课件.ppt
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高中英语必修二unit3课件.ppt
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Guess!
Atoy?
Ahandbag?
Computers,Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydontlikemenow.DoyouknowwhoIam?
abacus,Guessmore:
Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?
calculator,Icanbeusedforcalculating.Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseImsmallenoughforyoutotakemewithyou.,notebookcomputer,DoyouknowwhoIam?
Ahugecomputer,APC,thehistoryofthecomputer,laptop(手提电脑),PDA(掌上电脑),Caculator计算器,abacus,WhoamI?
Skimming:
Gooverthestorytofindoutwhothespeakeris.Writedown3sentencestosupportyouridea.,IwasabletosharemyknowledgewithothersthroughtheWorldWideWeb.,”MyrealfatherwasAlanTuring.”,IwasbuiltasanAnalyticalMachinebyCharlesBabbage.”,Timeline,Thecomputerbeganasacalculatingmachine,1822,AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork,Computershadgrownaslargeasaroom.,1960s,Computerswereusedinofficesandhomes,Computerswereusedinofficesandhomes.,Scanning:
TrueorFalse,AlanTuringbuiltanAnalyticalMachinetosolveanymathematicalproblems.Peoplebegantorealizethatthecomputergotclevererandquickerwithtimepassing.Thecomputerbegantoservethehumanracesinceitwasbroughtintopeopleshomes.Sincethe1970s,thecomputerwasusedbypeoplearoundtheworldthroughtheInternet.5.Thelargerthecomputeris,themorememoryithas.,F,T,F,T,F,auniversalmachine,itsbirth,IbecamesmallandthinbutIgotclevererandcleverer,quickerandquicker.AndmymemorybecamesolargethatIcouldntbelieveit!
correctthewrongsentences,1.Choosethebestanswers1)Whatsthemainideaofthetext?
A.Thecomputerwantstofind“whoheis”.B.Thefunctionalchangeofthecomputer.C.Thecomputerbecomespopulararoundtheworld.D.Thehistoryofthecomputer.,Comprehending:
2)Whatcanyouinferfromthetext?
A.Thecomputerhasartificialintelligence.B.Thecomputerchangesalotovertheyears.C.Thecomputerwasnotconnectedbyanetworkuntilintheearly1960s.D.Nowthecomputercanonlybeusedtodealwithinformation.,Q1:
HowdidthecomputerworkasanAnalyticalMachine?
Thecomputerfollowedinstructionsfromcardswithholes.,2.Questions,Q2:
Inhowmanywaysdowesaythecomputerchanged?
Whatarethey?
Size:
Intelligence:
Speed:
Function:
Peopleopinion:
smaller,quicker,cleverer,calculating-dealingwith,communicatingwith,clever&useful,1960s,Consolidation:
Retelling,1Amonitoris2Thescreenis3Akeyboardis4Amouseis5ACD-ROMis6Aharddiskis,(a)thepartofacomputerthatstoresinformation.(b)thepartofthecomputerthatyoutypeon.(c)thepartofthecomputerthatlookslikeatelevision(d)somethingyouusetoclickonthings(files,etc.).(e)thepartofthemonitorthatyoulookat.(f)aseparatediskthatcontainslotsofinformation.,Matchthewordswiththeirmeanings.,Internet,1.Whatcanthecomputerbeusedfor?
Task2.Discussion,schoolworkgamesemailsmusicandfilmschatinformationphotosshopping,Ourlifehaschanged!
palmtop,smallerdesktop,convenientlaptop,Whataretodayssmallercomputerslike?
2.Whataboutinthefuture?
virtualkeyboards虚拟键盘,Nose-topkeyboard-vest,robot,Whataboutinthefuture?
Supposeyouareareporter.NowyouareinterviewingMr./MissComputer.Samplequestions:
Whatdoyouliketoeat?
Whatareyourhobbies?
Whatisyournewestfunction(功能)?
Canyousaysomethingaboutyourfutureplan?
etc.,Task3.Role-play,Homework:
Reviewthepassage2.DoEx.1-3onP19-20.3.ReadthestoryaboutBillGates.,
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