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Unit4AmazingScienceTopic3Chinaisthethirdnationthatsentapersonintospace.SectionCWhatarethecomputersusedfor?1a1.

Tickthefieldsweusethecomputerin.•educationbusiness•industrycommunication•dailylifemedicalcare•entertainmentsportsDo

ctorscanfinddiseaseseasilywiththehelpofcomputers.Canyougiveanexampleoftheuseofthecomputerinoneofthefieldsabove?•Inspace,computershavebeenusedtocon

trolthespeedanddirectionofaspaceship.Whatisthepassageabout?TheImportanceofComputersUnderlinethetopicsentenceofeachparagraph

.1.SincecomputerswereinventedintheUSAinthe1950s,theyhavebecomeveryimportantinmanyareasofworkandleisure.2.SincetheInter

netcameintobeing,people’slivesathomehavebeenchanged,too.3.Computershaveimprovedourlives,buttheyhavebroughtproblem

s,too.PlaceTheusageofcomputersInspaceInhospitalsInfactoriesInbusinesscontrolthespeedanddirectionfinddiseaseseasilya

ndsolveotherproblemsdodangerousworkusedtoplaceandcancelordersThereisnodoubtthatwewillbesuccessful.Idon'tdoubtthattheywillbeabletosolv

etheproblems.doubtn.&v.怀疑，疑惑(2)doubt(vt.)+从句(3)doubt(vi.)+about/ofDoubtisthekeytoknowledge.Thereisnoreasontodoubtof

hishonesty.Idoubtwhether/ifhe'llchangehismind.(1)doubt(n.)1.Thereisnodoubtthatcomputersareveryusefulintechnologyandbusiness.毫无疑问电脑在技术和贸易业都非

常有用。2.Forexample,tinycomputerswhichareinsidepatients’bodiescankeeptheirheartsbeatingnormally.例如，病人体内植入微电脑能帮助病人的心脏正常搏动。64英寸超大型（Huge）32英寸

大型（Large）16英寸中型（Medium）8英寸小型（Small）4英寸超小型（Tiny）tinyverysmallinsizeadj.极小的，微小的atinygirlprep.在……内adv.在里面Languagepoints3.Th

ewholeworldisconnected.网络连接了全世界。connectv.连接connectionn.关系，联系1.connectAwithB使A与B连接2.connectsth.(tosth.)使电、气、水等接通3.connectsb./sth.(withsb

./sth.)与……有联系，把……联系起来•comeintobeing•moreandmore•watchmovies•thanksto•dobusiness•insteadof•chatonline•maketheworldsm

aller•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1.Forinstance,ifweworkoncomputerstoolong,wemaygetheadachesorsoreeyes.比如：如果我们使用的电脑工作的时间太长，我们就会头昏眼花。•f

orinstance=forexample用来举例说明某一论点或情况，一般只举同类人或物中的“一个”为例。•suchas用来列举事物时，一般列举同类人或事物中的几个例子。E.g.（1）Manycountries,Japan

,forinstance(forexample),hasalotofearthquakes.（2）Ilikefruits,suchasapples,pearsandbananas.(1)besides与except用于肯定句时，except意为“除……之外（不再有）”；beside

s意为“除……之外（还有）”。如：Ihaveanotherbluepenbesidesthisone.除了这支外，我还有另一支蓝色钢笔。（1+1，共2支）WeallpassedtheexamexceptTom.我们都通过了考试，汤姆除外。（整体中……汤姆一人不及格）(2)ex

cept前几乎总有all、any、every、no及其复合词等词。如：Heansweredallthequestionsexceptthelastone.除了最后一个问题没答外，其余问题他都答了。(3)except后接名词、代词、动名词和动词原形，这时except=but；但except后

跟副词、介词短语时，不能用but代替。如：Thewindowisneveropenexceptinsummer.这扇窗户从来不开，除夏季外。Hedidnothingexcept/butcleanthehouse.他只是打扫了房子

。2.Besides,noteverythingwereadontheInternetistrueorgoodforus.另外，我们在网上看到的东西并不都是真实的、有益的。1aReadandunderstand.动画1a1b2.Completethefollowingdiagram.

computersusageproblemworkdailylife1.____________________________ofaspaceship.2.helpdoctors____________

_________________.3._______________________________infactories.4.helpbusinessmen_____________________.1.pla

ygamesand__________________________.2._______________and_____________athome.3.___________________bysendinge-mailsa

nd_______________________________.1.getheadachesor_____________________.2.don’thaveenoughtime__________

________.3.somethingonInternetisnot________________.controlthespeedanddirectionfinddiseaseseasilycontroltherobo

tsplaceandcancelorderswatchmoviesdoshoppingdobusinesscommunicatechattingonlinesoreeyestostudyorexercisetrueorgoodproperly,besides,brought,get,e

nough•Computershaveimprovedourlives,buttheyhave_______problems,too.Forinstance,ifweworkoncomputerstoolong,we

may_____headachesorsoreeyes.Ifweplaycomputergamestoomuch,wewon’thave______timetostudyorexercise._____

_,noteverythingwereadontheInternetistrueorgoodforus.Computershelpusatworkandathome,buttheymustbeused_____

__.broughtgetenoughBesidesproperly2WriteashortpassagewiththetitlewithOneDayWithoutComputers.Thefollowinginformationmayhelpyou.Supposeyouwereonaspeci

aldayin2030.Duringtheday,therewerenocomputersintheworld.Whattroublewouldyouhave?Youmaybeginlikethis:OneDayWithoutCompu

tersToday,whenIgotup,Ijustturnedonthecomputerasusual,butitdidn’twork.ThenItriedmybrother’sPC,myparents’,evenmydog’s,butnoneofthemworked.Late

r,itwasreportedonTVthatallofthecomputersintheworldbrokedowntoday…OneDayWithoutComputersToday,whenIgotup,Ijusttu

rnedonthecomputerasusual,butitdidn’twork.ThenItriedmybrother’sPC,myparents’,evenmydog’s,butnoneofthemworked.Later,itwasre

portedonTVthatallofthecomputersintheworldbrokedowntoday.Sotheworldisquitedifferent.Forinstance,wecan’tplaygames,w

atchmoviesordoshoppingathome.Besides,wecan’tcommunicatebysendinge-mailsorchattingonline.Withoutthehelpofcomputers,businessmencan’tplaceorcancelord

ersonline.Teacherscan’tgivelessonstotheirstudents.What’sworse,robotscontrolledbycomputerscan’tdodang

erousworkforhumans.Eventhedoctorscan’tfindthediseaseseasily.Inshort,wealmosthavetroublewitheverythingwithoutcomputerstoday.Youcanwriteitlikethis:Su

mmaryWelearn:1.Somewords:doubt,tiny,inside,brain,cancel,connect2.Somephrases:nodoubt,forinstance3.Somesentences:(

1)Thereisnodoubtthatcomputersareveryusefulintechnologyandbusiness.(2)Computershelpusatworkandathome,buttheymustbeusedproperly.Wecan:1.Ta

lkabouttheimportanceofcomputers.2.Writeacompositionbyusingourimagination.•Read1a.•Memorizetheusefulex

pressionsandkeysentenceswhichwelearnedtoday.•FinishSectionCinyourworkbook.•ReviewSectionsA-C.