英语三级课程课件unit four section a

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1、UNITFoursectionATheComputerIsDownSometimesthebestthingsinlifecanalsobetheworst!Ifyouuseacomputer,thenyouknowallaboutthis.Computerscanhelpusdomanythings,butwhatiftheybreak?Let'sreadonandfindouthowlifecanchangeincrazywayswithnewtechnology.Ⅰ.airportn.[C]aplacewhereair

2、craftcanlandandtakeoff,oftenwithseveralbuildingswherepayingpassengerswait,gothroughcustoms,etc.航空港；飞机场eg:Iliveneartheairport.我住在飞机场附近。airportsecurity机场安全保卫2.allowvt.let(someone)dosomethingwithoutopposingthemortryingtopreventthem;let(something)bedone;permit允许；准许eg:W

3、eallowsmokingonlyinthisarea.我们只允许在这个区吸烟。3.issuevt.produce(especiallysomethingprintedand/orofficial)发行；发布eg:Thisstampwasissued10yearsago.这张邮票是10年前发行的。issueastatement发布一项声明n.1.[C]asubjecttobetalkedabout,arguedabout,ordecidedupon问题；议题eg:Ididn'twanttomakeanissueofit.我不

4、想去争论这件事。2.[C]somethingthatisproducedsoastobepubliclysoldorgivenout发行物eg:ThisisthelatestissueofTime.这是最新一期《时代》杂志。theChristmasissue圣诞特刊4.countern.1.[C]anarrowtableorflatsurfaceatwhichcustomersareservedinashop,bank,etc.柜台eg:Thiscounterisclosednow.这个柜台现在已停止营业。underthec

5、ounter秘密地；暗地里2.[C]apersonorespeciallyanelectricalapparatusthatcounts计算者；计算器eg:Setthecountertozero.把计数器拨到零。v.moveoractinordertoopposeordefendoneselfagainst(something)反对；对抗eg:Hecounteredmyplanwithoneofhisown.他以自己的一个计划来反对我的计划。adv.(inamannerordirectionthatis)opposedoro

6、pposite相反地eg:runcountertoone'swill与某人的意愿背道而驰Heactedcountertohispromise.他言行不一。5.starevi.looksteadilyforalongtime(e.g.ingreatsurpriseorshock)凝视；瞪眼睛eg:Hestaredattheword,tryingtorememberwhatitmeant.他盯着这个单词，努力想记起它的意思。stareintothedistance凝视远方6.screenn.1.[C]thefrontglasss

7、urfaceofanelectricalinstrument屏幕；荧光屏eg:Thisshowwillbebackonyourscreensagainnextyear.这个节目明年将在电视上再次和大家见面。2.[C]asurfaceonwhichacinemafilmisshown（电影）银屏；银幕eg:ascreenactor电影演员Shefirstappearedonthescreentenyearsago.10年前她在银幕上首次露面。vt.shelterorprotect遮蔽；掩护eg:Shescreenedherey

8、eswithherhands.她用手遮住双眼。screensomebody'sfaults掩盖某人的过失7.backupn.[C;U]athingorpersonreadytobeusedinplaceof,ortohelp,another替代物；助手；支援人员eg:Thisisaback