全新版大学英语第四册unite2

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1、Unit2SmartcarsInthisUnit,youwill…Pre-readingtaskText-analysisWordsandexpressionsClassassignmentsWritingskillsHomeworkpre-readingtaskDiscussing:IfIcanaffordacar,Iwillnotbuyonebecause…Listentothepassageagainandsaywhatchangeswillmakedriving:--wheels/power?--seatingarrangement?--roadsystem?--drivers?

2、II■Thecharacteristicofexpositorywriting:Factsandopinionsareofteninterwoven(交织)inexpositorywriting,andwemustlearntodistinguishthem.PleasetellsentencesthatexpressopinionsfromfactualstatementsinPartI.(分辨事实和看法)Anotherability---findingoutdefinitions:Providedefinitionsfor“blindspot”and“globalpositionin

3、gsystem”,“atomicclock”,“automateddriver.”TextanalysisWhatis“blindspot”?2.WhatistheGlobalpositioningsystem?3.Whatisanatomicclock?4.Whatisanautomateddriver?keykeykeykeyAnswers:1.Ablindspotmustbeaportionoftheroadbehindacar,whichadrivercannotobservefromtherear-viewmirror2.Globalpositioningsystemisase

4、rvicelinkedwithasatellite.Theymakeitpossibletodetermineyourlocationontheearthtowithinaboutahundredfeet.3.Atomicclockvibratesataprecisefrequency,accordingtothelawsofthequantumtheory.4.Anautomateddriverisaplancallsforcomputers,aidedbythousandsofthree-inchmagneticspikesburiedinthehighway,totakecompl

5、etecontrolofthedrivingofcarsonheavilytraffickedroads.Carswillbebunchedintogroupsoftentotwelvevehicles,onlysixfeetapart,travelinginunison,andcontrolledbycomputer2.eliminateremove,esp.sb./sth,thatisnotwantedorneeded;getridofvt.消除，消灭，排除Examples:1.Itisdifficultforourgovernmenttoeliminatepoverty.2.他可能

6、被取消了参加游泳比赛的资格。Collocation:eliminatesth.;eliminatesth.fromsth.e.g.Ifyouthinkyoumaybeallergictoafoodordrink,eliminateitfromyourdiet.3.Intheairintheearth'satmosphere;uncertain,notyetdecided空气顺空中;悬而未决Examples:Thereisapeculiarsmellintheair.Hundredsofbirdssuddenlyroseintheair.Ourplansarestillintheair.4

7、.startupExample:Peterlookedinhismirrorandstarteduptheengine.5.alertExamples:Whyweren'tthepolicealerted?Collocation:alertsb.;alertsb.tosthThemanageralertedthestafftothecrisisfacingthecompany.Theteacheralertedthestudents