高中一年级英语必修2课件.ppt

Unit3Computers Guessinggame Iamveryoldnow IwasborninChina Manypeopleusedmeforcalculatinginthepast butnowIamabitlonelybecausetheydon tlikemenow DoyouknowwhoIam abacus Iamverysmall Icanbeusedforcalculating InChina alotofstudentsusemewhensolvingmathematicalproblems DoyouknowwhoIam calculator Iambuilttosolvesomemathematicalproblems ButIamverybig DoyouknowwhoIam Ahugecomputer Iamacomputerwhichcansolveallkindsofproblemsandbeusedbothathomeandofficewidelynow Ihavebiggerscreen DoyouknowwhoIam APC desktop personalcomputer Iamakindofcomputerwhichcanbetakenconveniently 方便 DoyouknowwhoIam Alaptop notebookcomputer PDAPersonalDigitalAssistant IamsosmallinsizethatIcanfitinyourhand Iusuallyhaveasmallscreenusuallybiggerthanadigitalphone howeversmallerthanthesmallestlaptop I magreatwaytostoretelephonenumbers accesstheinternet makecalculations andsoon DoyouknowwhoIam robot I mamachinethatworksautomatically Icandoawidevarietyoftasks especiallysuitablefordoingjobstooboring difficult ordangerousforhumanbeings DoyouknowwhoIam Ahugecomputer PC PDA thehistoryofthecomputer laptop abacus calculator WhoamI 1 Lookthroughthepassagetofindoutwhothespeakeris Itisacomputer 2 Whichtype styledoesthetextbelongto 3 WhydoesthewriterusethetitleWHOAMI Whatkindofliterarydevices 修辞 doesthetextuse Personificationthefirstperson A Description 描写 B Narration 叙述 C Exposition 说明 D Argumentation 议论 Reading simple vivid interesting understandable 4 Whatisthemainideaofthewholepassage A Theearlydevelopmentofthecomputer B Thelatedevelopmentofthecomputer C Theimportanceofthecomputer D Thedevelopmentanduseofcomputers5 Inwhatorderisthispassagearranged 安排 Reading Time Timeline1642 1822 TheAnalyticalMachinewasmadebyCharlesBabbage 1940s Thefirstfamilyofcomputerswasconnectedtoeachother 1970s Now Thecomputerbeganasacalculatingmachine AlanTuringwroteabooktodescribehowcomputerscouldbemade Computersconnectpeopleallovertheworldtogether 1960s Computerswereusedinofficesandhomes Thecomputergrewaslargeasaroom Scanning 1936 Readparagraph1andthinkwhatisthetopicsentenceofthispassage OvertimeIhavebeenchangedquitealot haschangedovertime WhoamI Thecomputer Carefulreading Q1 1Whobuiltthefirstanalyticalmachine 2Whowasthenextimportantpersontodesigncomputers CharlesBabbagebuiltthefirstanalyticalmachine AlanTuringwasthenextimportantpersontodesigncomputers AlanTuring CharlesBabbage APC analyticalmachine calculatingmachine laptop universalmachine robot 1 2 3 4 5 6 Q2 thehistoryofthecomputer putinorder calculatingmachine analyticalmachine universalmachine PC desktop laptop Changesinfunctions Simplifydifficultsums Thinklogicallyandproduceananswerquickerthananyperson Solveanydifficultmathematicalproblem Usedinofficesandhomes Changesinsize 1 earlier 2 inthepast 3 modern notverybig huge smallerandthinner Changesinsize Changesinsize Readparagraph2quicklyandfindoutthetopicsentence Thesechangesonlybecamepossibleasmymemoryimproved 内存 tubes transistors chips WorldWideWeb network 网络 万维网 Para3 Sincethe1970smanynewapplicationshavebeenfoundforme communication finance trade robots mobilephones medicaloperations spacerockets Anyhow mygoalistoprovidinghumanswithalifeofhighquality exploretheMoonandMars Howcanyouunderstandtheunderlinedword Sincethe1970smanynewapplicationshavebeenfoundforme A aformalrequestforsthB thepracticaluseofsthC anactofspreadingsthD anactofmakingarule Everycoinhastwosides sodoestheInternet Thinkabouttheadvantagesanddisadvantagesaboutittousstudents Advantages Disadvantages Discussion ComputerandInternet sfunctions advantages typemyhomework drawpictures playgames communicatewithmyfriends gatherinformationformylessons listentomusic watchmovies doshopping BadforoureyesandhealthAwasteoftimeandmoneyMakepeopleisolatefromtheirfriendsSomepeopleespeciallytheteenagersareaddictedtothecomputergamesandchattingontheInternet Asaresult theyhavelittletimetostudy Somepeopleusethecomputerwrongly Thedisadvantages ConclusionThereisnodoubtthatcomputerhastwosides too Ifwemakegooduseofit itwillmakeourlivesmorecolorfulandconvenient Butdon tloseyourselfinplayingc