2021版高考英语大一轮复习Unit5Thepowerofnature练习新人教版选修6.doc

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1、Unit5　ThepowerofnatureⅠ.阅读AStartingthedayonaneggcouldkeepyourbloodpressureundercontrol,researchsuggests.Scientistshaveshownthateggsproduceproteinswithafunctionsimilartothatofpowerfulbloodpressure-loweringdrugs.Theresearch,fromtheUniversityofAlbertainCanada,showedthatwheneggscomeincontactw

2、ithstomachenzymes(酶)theyproduceaproteinthatactsinthesamewayasAceinhibitors,butmoreworkisneededtoshowtheeffectsoutsidealabandinthehumanbody.Earlierthismonth,Britishresearchersdeclaredthat,contrarytopopularbeliefs,itishealthytogotoworkonanegg.Theyconcludedthatthetypeofcholesterol(胆固醇)foundi

3、neggshaslittleeffectonincreasingheartdiseaserisks.ResearcherProfessorBruceGriffin,fromtheUniversityofSurrey,said,“Thewrongbeliefslinkingeggeatingtohighbloodcholesterolandheartdiseasemustbecorrected.Theamountoffatinourdiethasaneffectonbloodcholesterolthatisseveraltimesgreaterthantherelativ

4、elysmallamountsofcholesterolfoundineggs.TheUKpublicdonotneedtobelimitingthenumberofeggstheyeat.Theycanbeencouragedtoincludetheminahealthydietastheyareoneofnature’smostnutritiousfoods.”TheBritishHeartFoundationdroppeditsthree-egg-a-weeklimitin2005.However,almosthalfofBritonsbelievethelimit

5、stillapplies.1.FromthetextweknowthatAceinhibitorsare　　　. A.akindofproteinB.akindoffoodC.akindofmedicineD.akindofillness2.AccordingtowhatProfessorBrucesaid,eggs　　　. A.arethemostnutritiousfoodB.canbeincludedinahealthydietC.havenoeffectonbloodcholesterolD.areforbiddentobeeatenintheUK73.Wecan

6、inferfromthetextthat　　　. A.stomachenzymesmixedwitheggscancureheartdiseasesB.drugstolowerbloodpressurewillbereplacedbyeatingeggsC.mostBritonsagreethethree-egg-a-weeklimitshouldbedroppedD.about50%ofBritonsthinkeatinganeggadayisbadfortheirhealth4.Thetextismeant　　　. A.tointroduceamedicinemade

7、fromeggsB.tointroducescientificfindingsabouteggsC.totellpeoplehowtolowertheirbloodpressureD.toadvisepeopletoeatasmanyeggsaspossible语篇解读:本文是一篇说明文,主要讲述了关于鸡蛋的科学研究发现:鸡蛋在消化酶的作用下能产生一种可以降低血压的蛋白质,可以把血压控制在一定的范围内,但是为了验证这个结论仍需要大量的人体实验。答案及剖析:1.A　推理判断题。根据第一段中的Scientistshaveshown