英语四级考试辅导题附答案2017英语四级考试精选辅导题附答案Nothingisimpossibleforawillingheart.以下是小编为大家搜索整理的2017英语四级考试精选辅导题附答案，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!Wheredopesticidesfitintothepictureofenvironmentaldisease?Wehaveseenthattheynowpollutesoil,waterandfood,thattheyhavethepowertomakeourstreamsfishlessandourgardensandwoodlandssilentandbirdless.Man,howevermuchhemayliketopretendthecontrary,ispartofnature.Canheescapeapollutionthatisnowsothoroughlydistributedthroughoutourworld:Weknowthatevensingleexposurestothesechemicals,iftheamountislargeenough,cancauseextremelyseverepoisoning.Butthisisnotthemajorproblem.Thesuddenillnessordeathoffarmers,farmworkers,andothersexposedtosufficientquantitiesofpesticidesisverysadandshouldnotoccur.Forthepopulationasawhole,wemustbemoreconcernedwiththedelayedeffectsofabsorbingsmallamountsofthepesticidesthatinvisiblypolluteourworld.Responsiblepublichealthofficialshavepointedoutthatthebiologicaleffectsofchemicalsarecumulativeoverlongperiodsoftime,andthatthedangertoindividualmaydependonthesumoftheexposuresreceivedthroughouthislifetime.Fortheseveryreasonsthedangeriseasilyignored.Itishumannaturetoshakeoffwhatmayseemtousathreatoffuturedisaster."Menarenaturallymostimpressedbydiseaseswhichhaveobvioussigns,"saysawisephysician,DrReneDubos,"yetsomeoftheirworstenemiesslowlyapproachthemunnoticed."练习题：Choosecorrectanswerstothequestion:1.Whichofthefollowingisclosestinmeaningtothesentence"Man…ispartofnature"(Para.1,Lines3-4)?A.Manappearsindifferenttowhathappensinnature.B.Manactsasifhedoesnotbelongtonature.C.Mancanavoidtheeffectsofenvironmentalpollution.D.Mancanescapehisresponsibilitiesforenvironmentaleffectsofpesticides?2.Whatistheauthor"sattitudetowardtheenvironmentaleffectsofpesticides?A.PessimisticB.IndifferentC.DefensiveD.Concerned3.Intheauthor"sview,thesuddendeathcausedbyexposuretolargeamountsofpesticides_____.A.isnottheworstofthenegativeconsequencesresultingfromtheuseofpesticidesB.nowoccursmostfrequentlyamongallaccidentaldeathsC.hasshar