2019版高考英语一轮基础达标选题 Unit 2 Working the land（含解析）新人教版必修4

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

2、entionofheartdisease，cancerandmanyotherlifethreateningdiseases.Theremendeddailyrequirementis400－600InternationalUnits(IU).Insummer,peoplewithdarkbrowneyesanddarkerskinturnsunlightfromjust15minutesoutsidewithoutsunscreenintoadequateamountsofVitaminD．Evenduringwinte

3、r,justa10minutewalkatmiddaycankeepthebody’sVitaminDathealthylevels.Duringbriefwinterwalks，wereceivethegreatestbenefitswhenwewearnosunscreenandexposeasmuchskintothesunaspossible.VitaminDcanbealsoobtainedfromfoods.SalmonisoneofthebestsourcesoftheVitamin.Eggyolks(蛋黄)

4、，cheese，mushroomsandsomeanimalorganscontainsmallerquantitiesofit.Toattractconsumers，foodpaniesaddVitaminDtosomeoftheirmilkproducts.ThepracticeofputtingtheVitaminintomilkbeganinthe1930s.Atthattime，manychildrenweresufferingfromrickets，anillnessthatiscausedbyadeficie

5、ncy(缺乏)ofVitaminD．Itmadethechildren’sbonessoftandweak.AddingVitaminDtomilkhelpedtosolvetheproblem,andithasbeenavailableeversince.ForpeoplewhostillneedmoreVitaminD,thereisanotheroption；TakeVitaminDsupplements(补充物)．Theseproductsarewidelysoldinstores.However，anyoneco

6、nsideringtakingsupplementsshouldconsultaphysicianfirst.【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’tdresswarmlyenoughC．generallyliketoremainindoorsD．leavelotsofworkforotherstodoC　解析：细节理解题。根据第一

7、段中的“Inthedeadofwinter，wedon’ttypicallythinkaboutspendingtimeoutdoors，butaccordingtomanyphysiciansweshould.”可知，在冬天人们愿意待在室内。2．Accordingtothetext，VitaminD___________．A．canbeobtainedbybeingexposedtothesunB．canbeusedtocurelifethreateningdiseasesC．canbemainlyfoundinsome

8、milkproductsD．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’sseldomprepar