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英语四级阅读理解积累练习.docx

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英语四级阅读理解积累练习Waterproblemsinthefuturewillbecomenoreintenseandmorecomplex.Ourincreasingpopulationwilltremendouslyincreaseurbanwastes,primarilysewage.Ontheotherhand,increasingdemandsforwaterwilldeceasesubstantialytheamountofwateravailablefordilutingwastes.Rapidlyexpandingindustrieswhichinvolvemoreandmorecomplexchemicalprocesseswillproducelargevolumesofliquidwastes,andmanyofthesewillcontainchemicalswhicharenoxious.Tofeedourrapidlyexpandingpopulation,agriculturewillhavetobeintensified.Thiswillinvolveever-increasingquantitiesofagriculturalchemicals,Fromthis,itisapparentthatdrasticstepsmustbetakenimmediatelytodevelopcorrectivemeasuresforthepollutionproblem.Therearetwowaysbywhichthispollutionproblemcanbedwindled.Thefirstrelatestothetreatmentofwastestodecreasetheirpollutionhazard.Thisinvolvestheprocessingofsolidwastes"priorto"disposalandthetreatmentofliquidwastes,orefflunets,topermitthereuseofthewaterorminimizepollutionuponfinaldisposal.Asecondapproachistodevelopaneconomicuseforallorapartofthewastes.Farmmanureisspreadinfieldsasanutrientororganicsupplement.Effluentsfromsewagedisposalplantsareusedinsomeareasbothforirrigationandforthenutrientscontained.Efflunetsfromotherprocessingplantsmayalsobeusedasasupplementalsourceofwater.Manyindustries,suchasmeatandpoultryprocessingplants,arecurrentlyconvertingformerwasteproductsintomarketablebyproducts.Otherindustriesarepotentialeonomicusesforwasteproducts.1.Thepurposeofthispassageis______.a.toalertthereadertothedwindlingwatersupplyb.toexplainindustrialusesofwaterc.toacquaintthereaderwithwaterpollutionproblemsd.todemostratevariousmeasurestosolvethepollutionproblem2.WhichofthefollowingpointsisNOTINCLUDEDinthepassage?a.Industrialdevelopmentincudesthesimplificationofcomplexchemicalprocesses.b.Dilutingwastesneedscertainamountofwaterc.Demandsforwaterwillgoupalongwiththeexpandingpopulationd.Intensivecultivationoflandrequiresmoreandmorechemicals3.Thereadercanconcluedthat________.a.countriesoftheworldwillworktogetheronpolutionproblemsb.byproduct