2017考研英语阅读理解考前冲刺试题第十一套
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排&g
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排>>>2017年考研大纲下载及解析汇总>>>2017年全国硕士研究生招生简章专题新东方网校推荐:2017年考研政治、英语、数学课程!!点击进入免费试听>>IFYOU'RECONFUSEDBYALLthenewsaboutthehealtheffectsofeatingfish,you'renotalone.Ononehand,theomega-3fattyacidsinfishareknowntorecetheriskofheartdisease,astheAmericanHeartAssociationremindedustwoweeksagowhenitrestateditsrecommendationthateverybodyeatatleasttwofishservingsaweek.Ontheotherhand,fishthatfeedincontaminatedwaterwayscontainhighlevelsofmercury,whichcanleadtocognitiveproblemsindevelopingbrains.That'swhypregnantwomenandnursingmothersareadvisedtolimittheirconsumption.Asifthatweren'tconfusingenough,twonewstudiespublishedlastweekintheNewEnglandJournalofMedicineinvestigatedthepossibleeffectsofmercuryontheheart,andtheyseemtohavereachedcontradictoryconclusions.Onefoundnoclearlinkbetweenmercurylevelsandheartdisease;theotherfoundthatmenwithhighlevelsofmercuryintheirtoenailsweremorelikelytosufferaheartattackthanthosewithlowlevels.Whatarewetomakeofthis?Thefirstthingtorememberisthatthisishowscienceproceeds,byfitsandstartsandseeminglycontradictoryresultsthatgetresolvedonlybyfurtherstudy.Thesecondisthatnotallfisharecreatedequal.Comparedwithalltheotherthingsyoumighteat,fishareanexcellentsourceofprotein.Theytendtoeatalgaeaspartoftheirnaturallifecycle,convertingitintoomega-3fattyacidsthatcanimproveyourcholesterolprofile.Butit'salsotruethatourwaterwayshavebecomeincreasinglycontaminatedwithallsortsofpollutants,includingmercury,andthatthesepollutantstendtoaccumulateatdifferentlevelsindifferentspecies.Thefishmostatriskarepredatorshighinthepelagicfoodchain,suchasswordfishandsharks(seechart)。Itwastotesttheeffectsofmercuryontheheartthatthetwonewstudiescomparedthemercurylevelsinclippingsfromtoenails,whereheavymetalstendtobedeposited.Inonestudy,researchersledbyDr.EliseoGuallaratJohnsHopkinsfoundthatEuropeanandIsraelimenwiththehighestmercurylevelswerenearly2.2timesaslikelytohaveaheartattackasthosewiththelowestlevels.Theotherstudy,ledbyDr.WalterWillettattheHarvardSchoolofPublicHealth,lookedataselectionofAmericanmenandfoundnoconnectionbetweenmercuryexposureandriskofheartdisease,althoughWilletttoldmea“weakassociation”cannotberuledout.Formostofus,eatingtwoservingsoffishaweekshouldnotposeanyproblems.Guallar,whohailsfromcoastalSpain,continuestoflavorhispaellawithsalmon,whichhasnegligiblemercurylevels.Willetteatsswordfishonlyabouttwiceamonth——becauseofitsexpense,notanyfearofmercury.Fish-oilsupplementsarehighinomega3fattyacidsandprobablydon'tcontainasmuchmercuryaswholefish.Buttheydon'ttastenearlyasgood.注(1):本文选自Time;12/9/2002,p99;注(2):本文习题命题模仿对象2005真题Text1;1.Intheopeningparagraph,theauthorintroceshistopicby[A]makingacomparison[B]justifyinganassumption[C]posingacontrast[D]explainingaphenomenon2.Thephrase“byfitsandstarts”(Line6,Paragraph2)mostprobablymeans_______.[A]somethinghappenssmoothly[B]somethingkeepsstartingandthenstoppingagain[C]somethingdeservesalotofeffort[D]somethingistroublesome3.Clippingsfromtoenailswerechosenfortheresearchmostprobablybecause_______.[A]theyaremorelikelytocontainmercury[B]theyinfluenceaperson‘sheart[C]theycanbeeasilyobtained[D]theyareconnectedwiththeheart4.TheviewsofDr.EliseoGuallarandDr.WalterWillettare______.[A]identical[B]similar[C]opposite[D]complementary5.Whatcanweinferfromthelastparagraph?[A]FishisnothreattoMan.[B]Donotbefrightenedbysomefish.[C]EatFish-oilsupplementsinsteadoffish.[D]Tasteismoreimportantthanthesafetyofthefood.答案:CBACB
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排&g
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排&g
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排&g
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排&g
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排>&g
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相关推荐:>>>2017年考研现场确认时间及地点汇总>>>全国各地2017年考研报考点汇总>>>2017年考研时间、研究生考试时间安排&g