B2unit3Warmingup

Unit3ComputersWarmingup,高一人教新课标版必修二,abacus,1.Lookatthesepictures.Inpairsdiscusswhattheyhaveincommon.,Anabacusisanancienttoolusedforcounting.TheabacushasbeeninexistenceinChinasincethesecondcenturyBCuntilnow,althoughtheoldestcountingboardshavebeenfoundinfourthcenturyBCRome.,Acalculator,Acalculatorisanewcalculatingmachinewhichcansolvealargenumberofmathematicalproblems.,TheElectronicNumericalIntegratorAndCalculator,ThefirstelectroniccountingmachineincontinentalEurope.ItwasbuilttosolvesomemathematicalProblems.ThefirsttasksweresolvedonJanuary,4,1951.Butitistoobig.,APC/desktop,APCisapersonalcomputerwhichcansolveallkindsofproblemsandisusedwidelynow.,Alaptop/notebookcomputer,Anotebookcomputerisakindofusefulcomputerwhichcanbetakenconvenientlylikeanotebook.,PersonalDigitalAssistant,掌上电脑，又称为PDA，就是电脑的外围助理功能丰富，应用简便，可以满足你日常的大多数需求，比如看书、游戏，字典，学习，记事，看电影等等一应俱,Averysmalllightcomputerthatyoucancarrywithyou,andthatyouusetostoreinformationsuchastelephonenumbers,addresses,andappointments.SomePDAscansendandreceiveemail,andconnecttotheInternet.,Robot,Robotisamechanicaldevicethatsometimesresemblesahumanandiscapableofperformingavarietyofoftencomplexhumantasksoncommandorbybeingprogrammedinadvance.,Whatcanthefuturecomputerbelike?Whatcanwedobycomputerinthefuture?,Discussion,virtualkeyboards虚拟键盘,Nose-topkeyboard-vest,Discusswhattheyhaveincommon?Youareaskedtousethefollowingexpressionsinyourdiscussion.IthinkthatInmyopinionIbelievethatWhydoyouthinkso?Whatsyourreason?,Ithinktheyallcancalculatesomething.Theycandealwithsomemathproblems.Ibelievethattheyareourgoodfriendsinourdailylife.Wecannotfinishourworkquicklywithoutthem.Inmyopinion,theyarebeingusedwidelyandconvenientlyintheworld.,schoolworkgamesemailsmusicandfilmschatinformationphotosshopping,Whatcancomputersbeusedtodoinourdailylife?,WhatEnglishwordsdoyouknowaboutcomputers?,CD/DVD-ROM,CRTmonitor,LCDmonitor,CPU,harddisc,chips/motherboard,keyboard,mouse,modem,scanner,printer,speaker,floppydisc软盘（FloppyDisk）是个人计算机（PC）中最早使用的可移介质。,USBflashdiscU盘,CD/DVD/VCD,MP3player,Interviewyourclassmatesandfillinthefollowingchart.Askeachotherthequestion:HowdoyouusecomputersandtheInternet?Thenusethesentencepatternstomakeadialogue.,IoftenuseacomputertoIsometimesuseittoIneveruseitto,Computershavegreatpower.Theymakeourlivesmorecolorfulandmoreconvenient.BUTdontjustusecomputersforfun.Dontspendtoomuchtimeinplayingcomputergamesorchattingonline.Weshouldle