交通大学远程教育大学英语课后练习题及答案.docx

交通大学远程教育大学英语课后练习题及答案.docx

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交通大学远程教育大学英语课后练习题及答案

Unit1

PartTwo:

ReadandPractice

ReadandThink

II.Answerthefollowingquestionsaccordingtothetext.

1.WhatarethemaintypeofairPollution?

An.:

Theseincludesmog,acidrain,thegreenhouseeffect,and"holes"intheozonelayer.

2.Wheredoesexhaustcomefrom?

An.:

Theexhaustcomesfromburningfuelsinautomobiles,homes,andindustries.

3.Whyistheamountofcarbondioxideintheaircontinuingtoincrease?

An.:

Carbondioxideisproducedwhenfuelsareburned.Plantsconvertcarbondioxidebacktooxygen,butthereleaseofcarbondioxidefromhumanactivitiesishigherthantheworld'splantscanprocess.Thesituationismadeworsesincemanyoftheearth'sforestsarebeingremoved,andplantlifeisbeingdamagedbyacidrain.

4.Canpollutantsbecreatedbyindooractivities?

An.:

Yes.Somepollutantscanbecreatedbyindooractivitiessuchassmokingandcooking.

5.Whatisthefirststeptosolveairpollution?

An.:

Thefirststeptosolveairpollutionisassessment.

III.Putinthemissingwordsaccordingtothetext.

Thereareseveralmaintypesofpollutionandwell-knowneffectsofpollution.Onetypeofairpollutionisthereleaseofparticlesintotheairfromburningfuelforenergy.Anothertypeofpollutionisthereleaseofharmfulgasesintheatmosphere,formingsmogandacidrain.Thegreenhouseeffectisalsoreferredtoasglobalwarming.Inmanycountriesintheworld,stepsarebeingtakentostopthedamagetoourenvironmentfromairpollution.Theyhavesetcontrolsonpollutionemissionsfortransportationvehiclesandindustryandwemustmeetthechallengeinordertoassurethatahealthyenvironmentwillexistforourselvesandourchildren.

ReadandComplete

IV.Spellthefollowingwordswiththehelpoftheirmeaningsandfirstletters.

1.essentiala.absolutelynecessary.Vitallynecessary

2.substancen.thatwhichhasmassandoccupiesspace

3.significanta.important;ofconsequence;havingorexpressingameaning

4.well-beingn.acontentedstateorbeinghappyhealthyandprosperous

5.exhaustn.gasesejectedfromanengineaswasteproducts

6.convertv.tochangethenature,purpose,orfunctionofsomething

7.reactionn.aprocessinwhichoneormoresubstancesarechangedintoothers

8.derivev.toobtain;tocomefrom

9.consequencen.theoutcomeofaneventespeciallyasrelativetoanindividual

10.exposuren.thestateofbeingputintoasituationinwhichsomethingharmfulordangerousmightaffectyou

V.Completeeachofthefollowingstatementswiththewordsyouhavelearnedinthetext.

1.Heexplainedthathisdelaywasduetoanaccident.

2.Foreveryactionthereisanequalandoppositereaction.

3.Thisisoneofthemostsignificantstudiesofthesubject.

4.Thisgardenhasthebestcollectionofnativeplants.Inaddition,itcontainsnumeroustreesandflowersfromoverseas.

5.Thepaintcameoffastheresultofexposuretotherain.

VI.Fillintheblankswiththeproperwordsandexpressionsgivenbelow,changingtheformifnecessary.

1.Werefertocopperandsilverasgoodconductors.

2.Herepatienceisessential.

3.Thecompanysupply,thechildreninthemountainareawithalotofbooks.

4.Thesephenomenaareverycommonnow.

5.TheseEnglishwordsderivefromGreek.

6.Thestormcauseduntolddamagetothefarmer’sproduction.

7.Theregioncontinuestosufferfromseriouspollution.

8.Howdoyouconvertironintosteel?

9.ClimatechangecouldhaveseriousconsequencesforAfrica.

10.Theharmfulsubstancesreleasedintotheenvironment.

VII.Wordbuilding.

Nowadd-entoeachofthewordsbelowandthencompleteeachofthefollowingsentenceswithoneofthefinishedwords.

Sharp-sharpen;deep-deepen;high-heighten;bright-brighten;short-shorten;broad-broaden;wide-widen;quick-quicken;dark-darken;long-lengthen.

1.Johnglancedathiswatchandquickenedhispace.

2.Theroadbroadenedintoanimposingavenuelastyear.

3.HisexpressionbrightenedwhenImentionedthemoney.

4.Thegapbetweenincomeandexpenditurehaswidenedto10%.

5.Theyaretalkingaboutshorteningtheworkingweek.

6.Thebadnewsdarkenedtheirviewofthesituation.

7.It’sanopportunityforyoungpeopletodeepentheirunderstandingoftheworld.

8.Theteacheradvisespupilstosharpenalltheirpencilsbeforethetest.

9.Thedirectorusesmusictoheightentensioninthescene.

10.Thedayslengthenedassummerapproached.

VIII.PayattentiontotheitalicizedpartsintheEnglishsentencesandtranslatetheChinesesentences.

1.示例：

Airsuppliesuswithoxygenwhichisessentialforourbodiestolive.Treesandflowerscansupplyuswithfreshairandbeautifulview.

这家公司的任务是向周围的住户供应煤气。

译：

Thetaskofthiscompanyistosupplythehomesaroundwithgas.

他们向受洪灾地区（theflood-strickenarea）的人们提供了食品援助（aids）。

译：

Theysuppliedthepeople