2019高中英语unit9wheels课时跟踪练（三）lesson2

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1、课时跟踪练(三)Lesson2&Lesson3—Pre-readingⅠ.阅读理解AAfteryearsofresearchandtesting,thehybridcarwasdevelopedandputonthemarket.It'saninterestingandexcitingnewimprovementintoday'sworldaswelookforbetterwaystoprotectthequalityoftheairwebreatheandconserveournaturalresources.Thequalityofourairisaff

2、ectedbymanydifferentthings.Butoneofthelargestsourcesofairpollutionistheburningoffossilfuelssuchascoalandgasolinewhichisusedtopowerthecar'sengine.TheEPA(EnvironmentalProtectionAgency)hassetnationalstandardstohelpcontrolthelevelofharmfulpollutantsgivenoffintotheair,andtheautomobilein

3、dustryhasactedbyproducingahybridcarthatuseslessgasandthereforecauseslesspollution.Ahybridcarisacombinationofaregularcarthatrunsongasolineandanelectriccarthatisbatterypowered.Somepeopletendtothinkthatsincethehybridcarispartiallyelectric,youhavetoplugitintochargeit.Butthat'snothowitw

4、orks.The144voltbatterypackisactuallyrechargedthroughtheenergythatisproducedwhenthecar'sbrakesareused.Thisisreferredtoas“regenerativebraking”，becauseitgenerateselectricity.Althoughthehybridcarstillrunsongasolinemostofthetime,thishelpsituselessgasthanaregularcar.Whenthedriverstopsata

5、trafficlight,theengineautomaticallyshutsofftosavefuel.Then,assoonasthedriverputsthecaringearandtouchesthegaspedal,theenginestartsbackup.Haveyoueverriddeninacarwithsomeonewhoranoutofgas?Thatprobablywouldn'thappenifyouwereridinginahybridcar.Itflashesawarningonitscomputerscreenthatsay

6、s,“Iamlowongas.”Whenitcompletelyrunsout,thewarningreads：“YOUARENOWOUTOFGAS！”Thentheelectricpowersupplykicksintoletthedrivertravelafewmoremilestoagasstation.语篇解读：你是否在开车或坐车的时候，为汽车产生的尾气担忧？你是否有过在半路上汽油用完了的经历？现在已经有一种发明可以为你解忧了。1．Accordingtothepassage,theword“hybrid”isbestdefinedas________

7、.A．ahightechdiscoveryB．energysavingC．anewinventionD．acombinationoftwothings解析：选D　词义猜测题。由文章第三段第一句可知，这种汽车是普通燃油汽车与电动汽车的结合体，故推测hybrid应是“(不同事物的)混合物，合成物”之意，只有D项符合。2．“Regenerativebraking”isanimportantprocessofthehybridcarbecause________.A．itallowsthecartocometoaquickstopB．itmakesthecarrid

8、esmootherC．itgeneratesener