交通大学远程教育大学英语课后练习题及答案文档格式.docx

交通大学远程教育大学英语课后练习题及答案文档格式.docx

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Theseincludesmog,acidrain,thegreenhouseeffect,and"

holes"

intheozonelayer.2.Wheredoesexhaustcomefrom?

Theexhaustcomesfromburningfuelsinautomobiles,homes,andindustries.3.Whyistheamountofcarbondioxideintheaircontinuingtoincrease?

Carbondioxideisproducedwhenfuelsareburned.Plants convertcarbondioxidebacktooxygen,butthereleaseofcarbondioxidefromhumanactivitiesishigherthantheworld'

splantscanprocess.Thesituationismadeworsesincemanyoftheearth'

sforestsarebeingremoved,andplantlifeisbeingdamagedbyacidrain.

4.Canpollutantsbecreatedbyindooractivities?

Yes.Somepollutantscanbecreatedbyindooractivitiessuchassmokingandcooking.5.Whatisthefirststeptosolveairpollution?

Thefirststeptosolveairpollutionisassessment.

III.Putinthemissingwordsaccordingtothetext.

Thereareseveralmaintypesofpollutionandwell-knowneffectsofpollution.Onetypeofairpollutionisthereleaseofparticlesintotheairfromburning fuelforenergy.Anothertypeofpollutionisthereleaseofharmfulgasesintheatmosphere,formingsmogandacidrain.Thegreenhouseeffectisalsoreferredtoasglobalwarming.Inmanycountriesintheworld,stepsarebeingtakentostopthedamagetoourenvironmentfromairpollution.Theyhavesetcontrolsonpollutionemissionsfortransportationvehiclesandindustryandwemustmeetthechallengeinordertoassurethatahealthyenvironmentwillexistforourselvesandourchildren.

ReadandComplete

IV.Spellthefollowingwordswiththehelpoftheirmeaningsandfirstletters.

1.essential a. absolutelynecessary.Vitallynecessary

2.substance n. thatwhichhasmassandoccupiesspace

3.significant a. important;

ofconsequence;

havingorexpressingameaning

4.well-being n. acontentedstateorbeinghappyhealthyandprosperous

5.exhaust n. gasesejectedfromanengineaswasteproducts

6.convert v.tochangethenature,purpose,orfunctionofsomething

7.reaction n. aprocessinwhichoneormoresubstancesarechangedintoothers

8.derive v.toobtain;

tocomefrom

9.consequencen. theoutcomeofaneventespeciallyasrelativetoanindividual

10.exposure n. 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.Treesandflowers

cansupplyuswithfreshairandbeautifulview.

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）。

Theysuppliedthepeopleintheflood-strickenarea