必修2unit3 computers warming up课件.ppt

Book2Unit3Computerswarmingup,WordsaboutcomputersHistoryofdevelopmentofcomputersComparisonamongabacus,calculator,PCandPDASpeakingpracticeSummaryontheadvantagesanddisadvantagesofusingacomputer,Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydontlikemenow.DoyouknowwhoIam?,abacus,Guess:,Part1words,Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?,calculator,Itisamachine,whichyoucanusetotypeyourhomework,drawpictures,playgames,watchmovies,listentomusic,communicatewithyourfriends,gatherinformationWhoamI?,ComputerPC,itisakindofcomputerwhichcanbetakenconveniently(方便地)likeanotebook.,Alaptop,CPU(centralprocessingUnit)中央处理器,harddisc硬盘,chips主板,displaycard显卡,monitor显示器,keyboard键盘,mouse鼠标,modem,Scanner扫描仪,printer,Speaker音箱,CD/DVD/VCD,CD/DVD-ROM,光盘驱动器,Componentsofacomputer,Scanner,Printer,Monitor,Mouse,Speaker,内存RandomAccessMemory,重置,电脑组件,Whatdotheyhaveincommon?共同点,Whatsnext?,abacus,calculator,Hugecomputer,desktop,laptop,PDA,Robot,Part2History,Discussionandcompetition,Usewordsphrasestoexpresstheadvantages(优点)anddisadvantages(缺点)ofabacus,calculator,PC,andPDA.(用单词,词组来表达abacus,calculator,PC,PDA的优点,缺点)discussion3+writing5,Part3Comparison,AbacusAdvantages:fast,traditional,convenient,simpleDisadvantages:toosimpleCalculatorAdvantages:accurate(准确的),convenient,convenienttocarry,moreuseful,hasmorefunctions,likecos,sin,log,etcDisadvantages:peoplewillrelyonittoomuch,PCAdvantages:personal,popular,faster,intelligent,moreusefulusagesfunctions,(surfingtheInternet,lookingforinformation,drawpictures)Disadvantages:toobigtocarry,expensive,skillful(itrequirespeopleshouldknowhowtouseacomputer),PDAAdvantages:compact(小巧的),useful,portable(轻便的,方便携带的),convenienttocarryDisadvantages:thescreenistoosmall,itneedsbattery(电池),.losedata(数据).,Speakingpractice,Ifyoudecidetodesign(设计)yourownhouse,whichonedoyouliketousetohelpyour?abacus,calculator,PC,PDA?Giveyourreasons?,Part4,Summary,Discusstheadvantagesanddisadvantagesofusingacomputerwithyourpartner?,Part5,Advantages:1.surftheImunicatewithothersonline4.makefriendsallovertheworld5.makefreecallsthroughQQ6.watchfilms,videos.7.drawpictures8.usePhotoshoptomakeyourphotosmorebeautiful,disadvantages:1badinformation2badforourhealth,games.badforourstudy5.reducethetimeforrealfriendsa