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1、1、Thedarksmokethatcomesoutofstacks(大烟囱)orfromaburningdump(垃圾)containstinybitsofsolidor1iquidmatter.Thesmokealsocontainsmanygases,mostofwhichcannotbeseen.Altogether,theymakeuptheseriousproblemsofairpollution.Insomanyplacesitkeepsusfromseeingthesun,irr
2、itate(刺痛)oureyes,causesustocoughandmakesusill.Airpollutioncanspreadfromcitytocity・Itevenspreadsfromonecountrytorniother.SomenorthernEuropeancountrieshavehad"blacksnow"frompol1utantsthathavetraveledthroughtheairfromothercountriesandhavefallenwiththesn
3、ow.Soairpollutionisaglobalproblem.Itcankillbabies,olderpeopleandthosewhohaverespiratory(QfBR)disease・In1952,fourthousandspeopledieinoneweekasaresultofaseriousairpollutionbreakoutinLondon.In1948inasmalltownofPennsylvania,20peoplediedinafour一dayperiodo
4、fairpollution.Asoftenfoundincities,airpollutionincreasestherisksoflungdisease,suchasbronchitisandasthma.Ofcourse,smokingandotherfactorshelptocausetheseillnesses,too,butthesecauseshaveincreasedgreatlyduringrecentyearsasairpollutionhasbecomeworse.(1)、W
5、hichofthefollowingisNOTtrueaboutthe"blacksnow〃incident?A：IthappenedinthenorthernEuropeancountries.B：Ithappenedtherebecauseairpollutioninthesecountrieswasmostserious.C：Pollutantsthatfellwithsnowmadeitdirty.D：Ttisaglobalproblem.答案：B(2)、Whocanbekilledby
6、airpollution?A：Earthandplants.B：Stonesandbirds.C：Thosewhosufferfromrespiratoryillnesses.D：BothAandC.答案：c(3)、HowmanypeoplediedofairpollutioninPennsylvaniain1948?A：4,000.B：20.C：None-D：4020.答案：B(4)>Whatarebronchitisandasthma?A：Differenttypesofheadaches.
7、B：Lungdisease-C：Heartdiseases.D：Differenttypesofstomachaches・答案：B(5)、Accordingtothepassage,airpollutionincreasespeople'schanceofgetting9A：Headache.B：Alungdisease.C：Stomachache.D：Nervousbreakdown.答案:B2、Aslongasthesunshines,theearthwillnotrunoutofenerg
8、y.Thesunpoursmoreenergyonearththanwecaneveruse.Mostofthatenergycomestousasheatandlight.Energyfromthesuniscalledsolarenergy.Anythingtodowiththesuniscalled"solar〃・ThewordbeganwiththeRomanwordforthesunandtheirgodofthesun,whowascalledSol.Solarenergyisasa
