【文档说明】Unit4__Topic3__SectionC__精品课件九年级上册英语【仁爱版】.ppt，共(22)页，1.950 MB，由小喜鸽上传

转载请保留链接：https://www.ichengzhen.cn/view-104636.html

以下为本文档部分文字说明：

Unit4AmazingScienceTopic3Chinaisthethirdnationthatsentapersonintospace.SectionCWhatarethecomputersusedfor?1a1.Tickthefieldsweusethecomputerin.•

educationbusiness•industrycommunication•dailylifemedicalcare•entertainmentsportsDoctorscanfinddiseaseseasilywiththehelpofcom

puters.Canyougiveanexampleoftheuseofthecomputerinoneofthefieldsabove?•Inspace,computershavebeenusedtocont

rolthespeedanddirectionofaspaceship.Whatisthepassageabout?TheImportanceofComputersUnderlinethetopicsentenceofeachparagraph.1.Si

ncecomputerswereinventedintheUSAinthe1950s,theyhavebecomeveryimportantinmanyareasofworkandleisure.2.SincetheInternetcameintobeing,peop

le’slivesathomehavebeenchanged,too.3.Computershaveimprovedourlives,buttheyhavebroughtproblems,too.PlaceTheusageofcomputersInspaceInhospitalsInfactor

iesInbusinesscontrolthespeedanddirectionfinddiseaseseasilyandsolveotherproblemsdodangerousworkusedtoplaceandcancelordersThereisnodoubtthatwewillbesuc

cessful.Idon'tdoubtthattheywillbeabletosolvetheproblems.doubtn.&v.怀疑，疑惑(2)doubt(vt.)+从句(3)doubt(vi.)+about/ofDoubtisthekeytoknowledge.Thereisnore

asontodoubtofhishonesty.Idoubtwhether/ifhe'llchangehismind.(1)doubt(n.)1.Thereisnodoubtthatcomputersareveryusefulintechnologyandbusin

ess.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

.Thewholeworldisconnected.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•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。•forinstance=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,suchasap

ples,pearsandbananas.(1)besides与except用于肯定句时，except意为“除……之外（不再有）”；besides意为“除……之外（还有）”。如：Ihaveanotherbluepenbesidesth

isone.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)except前几乎总有all、any、every、no及其复合词等词。如：Heansweredalltheque

stionsexceptthelastone.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：Thewindowis

neveropenexceptinsummer.这扇窗户从来不开，除夏季外。Hedidnothingexcept/butcleanthehouse.他只是打扫了房子。2.Besides,noteverythin

gwereadontheInternetistrueorgoodforus.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.computersusageproblem

workdailylife1.____________________________ofaspaceship.2.helpdoctors_____________________________.3.___________________

____________infactories.4.helpbusinessmen_____________________.1.playgamesand__________________________.2.

_______________and_____________athome.3.___________________bysendinge-mailsand_______________________________.1.getheadachesor

_____________________.2.don’thaveenoughtime__________________.3.somethingonInternetisnot________________.controlthespeedanddirectionf

inddiseaseseasilycontroltherobotsplaceandcancelorderswatchmoviesdoshoppingdobusinesscommunicatechattingonlinesoreeyestostudyorexerc

isetrueorgoodproperly,besides,brought,get,enough•Computershaveimprovedourlives,buttheyhave_______problems,too.F

orinstance,ifweworkoncomputerstoolong,wemay_____headachesorsoreeyes.Ifweplaycomputergamestoomuch,wew

on’thave______timetostudyorexercise.______,noteverythingwereadontheInternetistrueorgoodforus.Computershelpusatworkandathome,butt

heymustbeused_______.broughtgetenoughBesidesproperly2WriteashortpassagewiththetitlewithOneDayWithoutCo

mputers.Thefollowinginformationmayhelpyou.Supposeyouwereonaspecialdayin2030.Duringtheday,therewerenocomputersintheworld.Whattrou

blewouldyouhave?Youmaybeginlikethis:OneDayWithoutComputersToday,whenIgotup,Ijustturnedonthecomputerasusua

l,butitdidn’twork.ThenItriedmybrother’sPC,myparents’,evenmydog’s,butnoneofthemworked.Later,itwasreportedonTVthatall

ofthecomputersintheworldbrokedowntoday…OneDayWithoutComputersToday,whenIgotup,Ijustturnedonthecomputerasusual,butitdidn’twork.ThenItriedmybrother’s

PC,myparents’,evenmydog’s,butnoneofthemworked.Later,itwasreportedonTVthatallofthecomputersintheworldbr

okedowntoday.Sotheworldisquitedifferent.Forinstance,wecan’tplaygames,watchmoviesordoshoppingathome.Besides,wecan’tcommunicatebysending

e-mailsorchattingonline.Withoutthehelpofcomputers,businessmencan’tplaceorcancelordersonline.Teacherscan’tgivelessonstotheirstudents.What’sworse

,robotscontrolledbycomputerscan’tdodangerousworkforhumans.Eventhedoctorscan’tfindthediseaseseasily.Inshort,wealmosth

avetroublewitheverythingwithoutcomputerstoday.Youcanwriteitlikethis:SummaryWelearn:1.Somewords:doubt,tiny,inside,brain,cancel,connect

2.Somephrases:nodoubt,forinstance3.Somesentences:(1)Thereisnodoubtthatcomputersareveryusefulintechnologyandbusiness.(2)Computershelpusatwo

rkandathome,buttheymustbeusedproperly.Wecan:1.Talkabouttheimportanceofcomputers.2.Writeacompositionbyusingourimagination.•Read1a.

•Memorizetheusefulexpressionsandkeysentenceswhichwelearnedtoday.•FinishSectionCinyourworkbook.•ReviewSectionsA-C.