2019版高考英语unit7thesea夯练含解析北师大版

《2019版高考英语unit7thesea夯练含解析北师大版》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit7TheSea李仕才一、阅读理解。Inthedeadofwinter，wedon'ttypicallythinkaboutspendingtimeoutdoors，butaccordingtomanyphysiciansweshould.Thesunisourgreatestsourceofavitaminthatisessentialforgoodhealth—VitaminD.Thisimportantvitaminstrengthensbonesandteethandislinkedtothepreventionofheartdisease，cancerandmany

2、otherlifethreateningdiseases.Therecommendeddailyrequirementis400600InternationalUnits(IU)．Insummer，peoplewithdarkbrowneyesanddarkerskinturnsunlightfromjust15minutesoutsidewithoutsunscreenintoadequateamountsofVitaminD.Evenduringwinter，justa10minutewalkatmiddaycankeepthebody'sVitaminDathealthyle

3、vels.Duringbriefwinterwalks，wereceivethegreatestbenefitswhenwewearnosunscreenandexposeasmuchskintothesunaspossible.VitaminDcanbealsoobtainedfromfoods.SalmonisoneofthebestsourcesoftheVitamin.Eggyolks(蛋黄)，cheese，mushroomsandsomeanimalorganscontainsmallerquantitiesofit.Toattractconsumers，foodcomp

4、aniesaddVitaminDtosomeoftheirmilkproducts.ThepracticeofputtingtheVitaminintomilkbeganinthe1930s.Atthattime，manychildrenweresufferingfromrickets，anillnessthatiscausedbyadeficiency(缺乏)ofVitaminD．Itmadethechildren'sbonessoftandweak.AddingVitaminDtomilkhelpedtosolvetheproblem，andithasbeenavailable

5、eversince.ForpeoplewhostillneedmoreVitaminD，thereisanotheroption：TakeVitaminDsupplements(补充物)．Theseproductsarewidelysoldinstores.However，anyoneconsideringtakingsupplementsshouldconsultaphysicianfirst.1．Duringthewintermonths，people________.A．aren'tabletomeettheirdeadlinesB．oftendon'tdresswarmly

6、enoughC．generallyliketoremainindoorsD．leavelotsofworkforotherstodo2．Accordingtothetext，VitaminD________.A．canbeobtainedbybeingexposedtothesunB．canbeusedtocurelifethreateningdiseasesC．canbemainlyfoundinsomemilkproductsD．canmakethechildren'sbonessoftandweak3．Whyissalmonmentionedinthisarticle?A．I

7、t'sseldompreparedinthecorrectway.B．It'sausefuladditiontoaperson'sdiet.C．Ithasahugeimpactontheenvironment.D．Itsadvantageshavebeenexaggerated.4．Themainpurposeofthisarticleis________.A．tointroduceavaluablenutrientB．toadvertiseVitaminDsuppl