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Unit4AmazingScienceTopic3Chinaisthethirdnationthatsentapersonintospace.SectionCWhatdoyouknowaboutthespaceships?Whatcancomputersdotospaceships?Astronautsusecomputerstocontrolthespeedanddirectionoftheirspaceships,eventhetemperature.Spaceshipsmainlyuseelectroniccontrols.Whatelsecancomputersbeusedfor?Forinstance/example,computerscanbeusedfor…1a1.Tickthefieldsweusethecomputerin.•educationbusiness•industrycommunication•dailylifemedicalcare•entertainmentsportsDoctorscanfinddiseaseseasilywiththehelpofcomputers.Canyougiveanexampleoftheuseofthecomputerinoneofthefieldsabove?Inbusiness,computersareusedtoplaceandcancleorders.下订单和取消订单Thereisnodoubtthatcomputersareveryimportant.毫无疑问Underlinethetopicsentenceofeachparagraph.1.SincecomputerswereinventedintheUSAinthe1950s,theyhavebecomeveryimportantinmanyareasofworkandleisure.2.SincetheInternetcameintobeing,people’slivesathomehavebeenchanged,too.3.Computershaveimprovedourlives,buttheyhavebroughtproblems,too.PlaceTheusageofcomputers(Computerscanbeusedto…)InspaceInhospitalsInfactoriesInbusinesscontrolthespeedanddirectionofaspaceshiphelpdoctorsfinddiseaseseasilyandsolveotherproblemscontroltherobotstododangerousworkplaceandcancelorders•comeintobeing•moreandmore•watchmovies•thanksto•dobusiness•insteadof•chatonline•maketheworldsmaller•做买卖•形成，产生•越来越多•看电影•代替•网上聊天•使世界更小•多亏，由于Whatproblemshavecomputersbrought?•Wemaygetheadachesorsoreeyes.•Wewon’thaveenoughtimetostudyorexercise.•NoteverythingontheInternetistrueorgoodforus.1aReadandunderstand.1b2.Completethefollowingdiagram.computersusageproblemworkdailylife1.____________________________ofaspaceship.2.helpdoctors_____________________________.3._______________________________infactories.4.helpbusinessmen_____________________.1.playgamesand__________________________.2._______________and_____________athome.3.___________________bysendinge-mailsand_______________________________.1.getheadachesor_____________________.2.don’thaveenoughtime__________________.3.somethingonInternetisnot________________.controlthespeedanddirectionfinddiseaseseasilycontroltherobotsplaceandcancelorderswatchmoviesdoshoppingdobusinesscommunicatechattingonlinesoreeyestostudyorexercisetrueorgoodComputersareimportantanduseful.However,theymustbeusedproperly.Nocomputers!!!Forhospitals?Forfactories?Foryou?Forbusiness:Fortheworld?2WriteashortpassagewiththetitlewithOneDayWithoutComputers.Thefollowinginformationmayhelpyou.Supposeyouwereonaspecialdayin2030.Duringtheday,therewerenocomputersintheworld.Whattroublewouldyouhave?Youmaybeginlikethis:OneDayWithoutComputersToday,whenIgotup,Ijustturnedonthecomputerasusual,butitdidn’twork.ThenItriedmybrother’sPC,myparents’,evenmydog’s,butnoneofthemworked.Later,itwasreportedonTVthatallofthecomputersintheworldbrokedowntoday.Sotheworldisquitedifferent.Forinstance,wecan’t…OneDayWithoutComputersToday,whenIgotup,Ijustturnedonthecomputerasusual,butitdidn’twork.ThenItriedmybrother’sPC,myparents’,evenmydog’s,butnoneofthemworked.Later,itwasreportedonTVthatallofthecomputersintheworldbrokedowntoday.Sotheworldisquitedifferent.Forinstance,wecan’tplaygames,watchmoviesordoshoppingathome.Besides,wecan’tcommunicatebysendinge-mailsorchattingonline.Withoutthehelpofcomputers,businessmencan’tplaceorcancelordersonline.Teacherscan’tgivelessonstotheirstudents.What’sworse,robotscontrolledbycomputerscan’tdodangerousworkforhumans.Eventhedoctorscan’tfindthediseaseseasily.Inshort,wealmosthavetroublewitheverythingwithoutcomputerstoday.Youcanwriteitlikethis:SummaryWelearn:1.Somewords:doubt,tiny,inside,brain,cancel,connect2.Somephrases:nodoubt,forinstance3.Somesentences:(1)Thereisnodoubtthatcomputersareveryusefulintechnologyandbusiness.(2)Computershelpusatworkandathome,buttheymustbeusedproperly.Wecan:1.Talkabouttheimportanceofcomputers.2.Writeacompositionbyusingourimagination.Thankyou