小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com选择性必修三Unit2拔卷选（考试时间：75分钟试卷满分：100分）第一部分阅读理解(共两节，满分50分)第一节（共15小题；每小题2.5分，满分37.5分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。AThefirsttimeIquestionedthetraditionalwisdomonthenatureofahealthydiet,itwas40yearsago,andthesubjectwassalt.Researchersfoundthatsaltsupplementation(补充)wasunnecessaryafterexercise,andthisadvicewaspassedonbyhealthreporters.Irecalledhighschoolfootballpracticesinhotdays.Withoutsaltpills,Icouldn’tmakeitthroughatwo-hourpractice.Althoughsportsnutritionistshaverecommendedconsumingmoresaltwhenwesweathardinphysicalactivity,themessagethatweshouldavoidsaltatallothertimesremainsstrong.Andsaltisstillconsidereddeadly.Sowhyhavewebeentoldthatsaltissodeadly?Theadvicehasalwayssoundedreasonable:Eatmoresalt,andyourbodykeepswatertomaintainastableconcentrationofsodium(钠)inyourblood.Thisiswhysaltyfoodmightmakeusthirsty:Wedrinkmore;wekeepwater.Theresultcanbeatemporaryincreaseinbloodpressure.Thescientificquestioniswhetherthistemporaryphenomenonleadstopermanentproblems:Ifweeattoomuchsaltforyears,doesitcausehighbloodpressure,andthenkillus?Itmakessense,butit’sonlyahypothesis(假设),whichhasn’tbeenprovedbutunfortunatelyacceptedasafact.Inreality,eatinglesssaltcanworsenhealth.Decadesago,Italianresearchers’studyreportedthatreducingsaltconsumptionincreasedtheriskofdyingearlyandthatreducingsodiumtoagovernment-recommended“safeupperlimit”isactuallyharmful.Supportersoftheeat-less-saltcampaign(运动)tendtodealwiththisopposingevidence(证据)byimplyingthatanyoneraisingitisashill(同谋)forthefoodindustry(widelycriticizedforaddingsalttoprocessedfoodstoimprovertaste).WhenseveralgovernmentagenciesheldahearinglastNovembertodiscusshowtoensureAmericanseatlesssalt,anti-saltsupportersarguedthatthelatestreportssuggestingdamagefromlower-saltdietsshouldsimplybeignored.Thisattitude,whichlacksrespectforscience,has小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.combeenheldfortheanti-saltcampaignfordecades.Maybenowisthetimeforittochange.1.Theunderlinedphraseinparagraph1referstothebeliefthat_________.A.peopleshouldtakeinsaltafterexerciseB.saltintakewasneedlessafterphysicalactivityC.saltpillswerehelpfulduringfootballpracticesD.ahealthydietdoesnotnecessarilyincludeenoughsalt2.WhatdoestheItalianresearchers’studyshow?A.Eatinglesssaltcanharmourhealth.B.Eatingtoomuchsaltraisesbloodpressure.C.Weshouldtrytoavoidsaltonadailybasis.D.Weshouldfollowtherecommended“safeupperlimit”.3.Whatdotheeat-less-saltcampaignersdowiththeopposingevidence?A.Theytreatitwithsomerespect.B.Theyreportittothegovernmentagencies.C.Theydoscientificexperimentstosupportit.D.Theysuggestthatthefoodindustryisbehindit.BPhysicaleducation,orPE,isn'trequiredforallhighschoolstudents.Insomeschools,itisn'tofferedforsomedifferentreasons.Butshouldhighschoolstudentshavephysicaleducation?Theansweriscertainly"yes".Todaymanypeopledon'tdosports.Butasisknowntoall.doingsportsisveryimportantforanadult.Teachingteenstheimportanceofahealthylifestyleandmakingfitnessplansnowcanhelpteensputexerciseinthefirstplaceasanadult.Highschoolisn'tthateasy.Manystudentsareunderalotofstress.Stresscanbeharmfultoastudent'sstudiesandlife.Doingsportsc...