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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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
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