Book 2 Unit 3 Computers计算机课件定稿

Unit3ComputersPartI:CalculatingmachinesandpartsofacomputerabacuscalculatortheAnalyticalMachinetheuniversalmachinePartII:Reading:1.Pleasegooverthetextandanswerthefollowingtwoquestions:⑴Thepassageismainlyaboutthe_______.A.theuseofthecomputerB.thehistoryanddevelopmentofthecomputerC.goodandbadeffectsofthecomputer⑵Thepassageiswrittenin______order.A.spaceB.placeC.timeBC2.Listentothetapeandfindoutallthetimeofyearsfromthetext.164219361940s1960s1970sNowABCDEFMatchtheyearwiththerightpicturesNow1642182219361960s1970s3.Finishthetimeline.1642:_______________________________________________.1822:____________________________________________________.1936:________________________________________________________________________________.Thecomputerbeganasacalculatingmachine.AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork.TheAnalyticalMachinewasmadebyCharlesBabbage.1960s:__________________________________________________.______:Thefirstfamilyofcomputerswasconnectedtoeachother.1970s:__________________________________________________.Now:__________________________________________________.Computershadnewtransistorsandbecamesmaller1960sComputerswerebroughtintopeople’shomesComputersconnectpeopleallovertheworldtogether4：Completethefollowingsentences.1642:Thecomputerbeganasa.1822:Theanalyticalmachineby.1936:AllenTuringwroteatodescribehowcomputerstowork.1960s:Computershadnewand.1960s:Thefirstfamilyofcomputerstoeachother.1970s:Computersintopeople’shomes.Now:Peopleallovertheworld____byComputers.4：Summarizethetext，usingthefollowingasaguide1642calculatingmachine1822analyticalmachine1936universalmachine1960snewtransistors1960sanetwork1970sintopeople’shomesNowpeopleallovertheworldPartthreeToday’scomputersDiscussion:Discussthegoodandbadeffectscomputershaveonyourlife.Usefulstructures:Ithinkthat…Inmyopinion…Ibelievethat…Theadvantageis…Thedisadvantageis…PredictthecomputerinthenearfutureHomework:1.Writeashortpassageaboutthedevelopmentofcomputers.2.FindoutallthesentencesinthepassivevoicefromthereadingandfinishEx1-3onpage20.3.ThinkofwaystohelpstudentssurftheInternetsafelyandwritethemdown.