UNIT4TOPIC3SECTIONC课文讲解课件仁爱版英语九年级上册

SectionC课文讲解Unit4AmazingScienceTopic3Chinaisthethirdnationthatsentapersonintospace.Whatarethecomputersusedfor?educationbusinessindustrycommunication……..TheImportanceofComputersleisuren.闲暇，业余时间；休闲活动leisureadj.空闲的，有闲的；业余的e.g.In

leisure

time,

my

parents

played

with

me

and

Coco.

SincecomputerswereinventedintheUSAinthe1950s,theyhavebecomeveryimportantinmanyareasofworkandleisure.译文：从20世纪50年代，美国发明了电脑以后，它就在人们的工作和休闲领域有很重要的作用。Thereisnodoubtthatcomputersareveryusefulintechnologyandbusiness.译文：毫无疑问，电脑在技术和商业领域都非常有用。Thereisnodoubtthat…无疑，毫无疑问……e.g.Thereisnodoubtthatwewillbesuccessful.

Thereisnodoubtthatwedidtherightthing.Inspace,computershavebeenusedtocontrolthespeedanddirectionofaspaceship.译文：在太空中，电脑可以用来控制宇宙飞船的速度和方向。Withthehelpofcomputers,doctorscanfinddiseaseseasilyandsolveotherproblems.译文：在电脑的帮助下，医生能够轻而易举地发现疾病并解决其他问题。withthehelpof…在……帮助下e.g.With

the

help

of

myclassmates,

my

spokenEnglish

got

improved

inthe

end.

Forexample,tinycomputerswhichareinsidepatients’bodiescankeeptheirheartsbeatingnormally.译文：例如，病人体内的微型电脑能够让他们的心脏正常跳动。verysmallinsizeadj.极小的，微小的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）Infactories,robotsarecontrolledbycomputersthatarelikehumanbrains.Theycandoworkthatisdangeroustohumans.译文：在工厂中，可以用类似人脑的电脑来控制机器人。它们可以做很危险的工作。Inbusiness,computersareusedtoplaceandcancelorders.Theyarealsomakingtheworkplacesaferandbetter.译文：在商业领域，电脑是用来设置或取消命令的。它们还能让工作场所更安全更好。SincetheInternetcameintobeing,people'slivesathomehavechanged,too.Moreandmorepeoplehavepersonalcomputersthatareusedtoplaygamesandwatchmovies.译文：电脑出现以后，人类的生活也发生了改变。越来越多的人有私人电脑用来玩游戏或看电影。comeintobeing形成moreandmore越来越多ThankstotheInternet,peoplecandoshoppinganddobusinessathome.译文：有了网络，人们可以在家里购物或办公。thanksto多亏，由于doshopping购物dobusiness经商Insteadofwritinglettersonpaper,peoplecommunicatebysendinge-mailsandchattingonline.译文：人们交流时不再用纸写信，而是发送邮件或在网上聊天。insteadof

代替Thewholeworldisconnected.TheInternetismakingtheworldsmaller,likeavillage.译文：整个世界都联系在一起。网络让地球变得更小，像个村子一样。connectv.连接

1.connect

Awith

B使A与B连接2.connect

sth.(to

sth.)使电、气、水等接通3.connectsb./sth.(withsb./sth.)与……有联系，把……联系起来connectionn.关系，联系Computershaveimprovedourlives,buttheyhavebroughtproblems,too.Forinstance,ifweworkoncomputerstoolong,wemaygetheadachesorsoreeyes.Ifweplaycomputergamestoomuch,wewon'thaveenoughtimetostudyorexercise.Besides,noteverythingwereadontheInternetistrueorgoodforus.Computershelpusatworkandathome,buttheymustbeusedproperly.forinstance=forexample例如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。e.g.Manycountries,Japan,forinstance(forexample),hasalotofearthquakes.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.Ilikefruits,suchasapples,pearsandbananas.

Computershaveimprovedourlives,buttheyhavebroughtproblems,too.Forinstance,ifweworkoncomputerstoolong,wemaygetheadachesorsoreeyes.Ifweplaycomputergamestoomuch,wewon'thaveenoughtimetostudyorexercise.Besides,noteverythingwereadontheInternetistrueorgoodforus.Computershelpusatworkandathome,buttheymustbeusedproperly.除……之外（还有）except除……之外（不再有）e.g.WeallpassedtheexamexceptTom.

我们都通过了考试，汤姆除外。（整体中……汤姆一人不及格）except前几乎总有all、any、every、no及其复合词等词。e.g.Heansweredallthequestionsexceptthelastone.

除了最后一个问题没答外，其余问题他都答了。知识拓展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。e.g.Thewindowisneveropenexceptinsummer.这扇窗户从来不开，除夏季外。Hedidnothingexcept/butcleanthehouse.他只是打扫了房子。知识拓展computersusageproblemworkdailylife1.____________________________ofaspaceship.2.helpdoctors_____________________________.3._______________________________infactories.4.helpbusinessmen_____________________.1.playgamesand__________________________.2._______________and_____________athome.3.___________________bysendinge-mailsand_______________________________.1.getheadachesor_____________________.2.don’thaveenoughtime__________________.3.somethingonInternetisnot