高考英语一轮基础达标选题unit2workingtheland（含解析）必修

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1、Unit2Workingtheland一、阅读理解Inthedeadofwinter，wedon’ttypicallythinkaboutspendingtimeoutdoors，butaccordingtomanyphysiciansweshould.Thesunisourgreatestsourceofavitaminthatisessentialforgoodhealth—VitaminD．Thisimportantvitaminstrengthensbonesandteethandislin

2、kedtothepreventionofheartdisease，cancerandmanyotherlifethreateningdiseases.Therecommendeddailyrequirementis400－600InternationalUnits(IU).Insummer,peoplewithdarkbrowneyesanddarkerskinturnsunlightfromjust15minutesoutsidewithoutsunscreenintoadequateamount

3、sofVitaminD．Evenduringwinter,justa10minutewalkatmiddaycankeepthebody’sVitaminDathealthylevels.Duringbriefwinterwalks，wereceivethegreatestbenefitswhenwewearnosunscreenandexposeasmuchskintothesunaspossible.VitaminDcanbealsoobtainedfromfoods.Salmonisoneof

4、thebestsourcesoftheVitamin.Eggyolks(蛋黄)，cheese，mushroomsandsomeanimalorganscontainsmallerquantitiesofit.Toattractconsumers，foodcompaniesaddVitaminDtosomeoftheirmilkproducts.ThepracticeofputtingtheVitaminintomilkbeganinthe1930s.Atthattime，manychildrenwe

5、resufferingfromrickets，anillnessthatiscausedbyadeficiency(缺乏)ofVitaminD．Itmadethechildren’sbonessoftandweak.AddingVitaminDtomilkhelpedtosolvetheproblem,andithasbeenavailableeversince.ForpeoplewhostillneedmoreVitaminD,thereisanotheroption；TakeVitaminDsu

6、pplements(补充物)．Theseproductsarewidelysoldinstores.However，anyoneconsideringtakingsupplementsshouldconsultaphysicianfirst.【解题导语】　本文是一篇科普文，主要介绍了维生素D的一些情况。1．Duringthewintermonths，people___________．A．aren’tabletomeettheirdeadlinesB．oftendon’tdresswarmlyeno

7、ughC．generallyliketoremainindoorsD．leavelotsofworkforotherstodoC　解析：细节理解题。根据第一段中的“Inthedeadofwinter，wedon’ttypicallythinkaboutspendingtimeoutdoors，butaccordingtomanyphysiciansweshould.”可知，在冬天人们愿意待在室内。2．Accordingtothetext，VitaminD___________．A．canbeobta

8、inedbybeingexposedtothesunB．canbeusedtocurelifethreateningdiseasesC．canbemainlyfoundinsomemilkproductsD．canmakethechildren’sbonessoftandweakA　解析：细节理解题。根据第一段第二句以及第三段第一句可知，维生素D可以通过晒太阳获得，故选A。3．Whyissalmonmentionedinthisarticle?A．It’sseldom