人教版新课标高中英语必修2unit3-ppt课件

Unit3Computers Guessing DoyouknowwhoIam warmingup Iamveryoldnow IwasborninChina Manypeopleusedmeforcalculatinginthepast butnowIamabitlonelybecausetheydon tusemeoftennow DoyouknowwhoIam abacus Iamverysmall Icanbeusedforcalculating InChina alotofstudentsusemewhensolvingmathematicalproblems WhoamI calculator 计算器 Iamverybig Scientistsusemetosolvesomemathematicalproblems DoyouknowwhoIam hugecomputer巨型计算机 Icanbeusedforcalculating Besides IcanalsobeusedforwatchingDVD sendinge mailandcommunicatingthroughtheInternet However IamnotaPC becauseI msmallenoughforyoutotakemewithyou DoyouknowwhoIam notebookcomputer laptop 笔记本电脑 Whatdotheyhaveincommon 1 Theycanbeusedforcalculating 2 Theycandealwithmathsproblems 3 Theyareusefulandhelpful robot artificialintelligence Nowadayscomputersplayaveryimportantroleinourdailylife Doyouknowaboutcomputers keyboard键盘 mouse鼠标 monitor显示器 screen屏幕 speaker音响 host主机 ComponentsofaComputer Lookatthesepicturesandguesswhattheyare acalculatingmachine analyticalmachine universalmachine solvedifficultmathematicalproblems computeraslargeasaroom Lookattheseinventions Canyouputtheminanorderaccordingtothetimewhentheyappeared Afterreadingthepassage checktoseeifyouareright analyticalmachine laptop calculatingmachine robot PC universalmachine Reading WHOAMI Skimmingtogetgeneralideas While reading 1 1 Whoisthespeaker I inthisstory I ama 2 What sthemainideaofthispassage A Thedevelopmentofcomputers B Thedevelopmentanduseofcomputers C Amachinewhichissimple minded D Computersmayreplacehumanbeings computer 3 Thetextiswritteninanorderof time While reading 1 skimming Scanningtogetdetailedinformation While reading 2 3 careful reading timeline 1642 1822 1936 1940s 1960s 1970s Thecomputerbeganasacalculatingmachine TheAnalyticalMachinewasbuiltbyCharlesBabbage Thecomputergrewrapidlybothinsizeandinbrainpower Computerhadgrownaslargeasaroom Computerswereusedinofficesandhomes Thefirstfamilyofcomputerswasconnectedbyanetwork Manynewapplicationshavebeenfoundforcomputers Now Computersconnectpeopleallovertheworldtogether While reading 2 scanning Universalmachine Lookattheseinventions Canyouputtheminanorderaccordingtothetimewhentheyappeared Afterreadingthepassage checktoseeifyouareright analyticalmachine laptop calculatingmachine robot PC universalmachine 1 2 3 4 5 6 PDA abacus calculator hugecomputer PC laptop What snext robot Thehistoryofcomputers TopicSentence While reading 3 carefulreading ReadthepassageagaincarefullyandfinishEx 2onP19inthestudentbook OvertimeIhavebeenchangedquitealot calculatingmachine analyticalmachine universalmachine PC laptop WhycouldI think logicallyandproduceananswerquickerthananyperson BecauseIwasprogrammedbyanoperatorwhousedcardswithholes While reading 3 Thosechangesonlybecamepossibleasmymemoryimproved tubes transistors chips network WorldWideWeb 2 Itotallychangedmyshape because mymemorywasfirststoredintubes thenontransistorsandlateronvery smallchips Itotallychangedmyshape While reading 3 Sincethe1970smanynewapplicationshavebeenfoundforme communications finance trade robots mobilephones medicaloperations spacerockets providealifeofhighquality 3 Manynewapplicationshavebeenfoundforme suchas communications finance trade robots mobile Rockets phones medicaloperations space 4 translation Overtimemymemoryhasdevelopedsomuchthat likeanelephant IneverforgetanythingIhavebeentold 随着时间的推移 我的记忆力发展的如此之快 就像一头大象 我从来不会忘记告诉我的任何事情 While reading 3 1 MyrealfatherwasCharlesBabbage whowroteabookandbuiltmein1936 2 AfterIgotmynewtransistorsinthe1960s Ibecamesmallerbutclevererandquicker 3 Iwasbroughtintopeople shomesinthe1970s 4 SincemybirthIhavebeenbuilttotaketheplaceofthehumanrace TrueorFalse Quiz1 5 IbeganasacalculatingmachineinJapanin1642 6 In1936 Igrewrapidlybothinsizeandinbrainpower 7 Astimewentby Iwasmadebigger 8 Sincethe1970smanynewapplicationshavebeenfoundforme 1 Whowasthefirstpersontomaketheearliestcomputer A AlanTuring B CharlesBabbage C CharlesTuring D AlanBabbage 2 Whenwasthe universalmachine built A In1822 B In1642 C In1936 D In1970 Quiz2 3 Whenwasthecomputerthebiggest A In1642 B In1936 C Inthe1940s D Inthe1970s 4 Howoldisthecomputer A About170yearsold B About270yearsold C About370yearsoldD About470yearsold 5 Whichofthefollowingisintherightorderoftime Thecomputerwasconnectedwithothercomputers b AlanTuringwroteabookaboutthecomputer c ThecomputerhasbeensenttoexploretheMoonandMars d Thecomputerbegantosimplifydifficultsums A a b c d B b c a d C d a c b D d b a c Summaryofthereadingtext Ibeganasa in1642inFrance In1822Iwasbuiltasan Thenin1936AlanTuringwroteabookandbuilta Astheyearshavegoneby Ihavebeenmade and butIbecame and calculatingmachine analyticalmachine machine universal smaller smaller cleverer quicker Inthe theygavemeafamilyconnectedbya NowpeoplecallittheInternet Ihavebeenusedin and sincethe1970s SoIbecamePC Sincemy Ihavetrulybeenbuilttoservethe network 1960s humanrace offices homes birth palmtop smallerdesktops convenientlaptop Whataretoday ssmallercomputerslike theiPad Whatareadvantagesanddi