2018年4月4日阅读理解之科普说明类-学易试题君之每日一题君2017-2018学年中考九年级

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1、2018年4月4日阅读理解之科普说明类中考频度：★★★★☆难易程度：★★★★☆（2017・江苏南通）AWespendaboutone-thirdofourlivesasleep・Thismaysoundlikealotoftime,butitisnotwasted・Ourbodiesneedsleeptostayhealthy.Notgettingenoughsleepcanmakeussick.Sleepandourimmune（免疫）systemTheimmunesystemprotectsthebodyfromd

2、iseasesandinfections（传染）.Notgettingenoughsleephurtsthisprotectivesystem.TheMayoClinicisaresearchhospitalintheUnitedStates.Itswebsiteexplainsthatwhenwesleepourbodiesproduceproteins（蛋白质）thatsupportsleepandhelpusfightinfections.Theyaddthatinfection-fightingantibodi

3、es（抗彳本）arcreducedduringperiodswhenyoudon'tgetenoughsleep.AnewstudyfromtheUniversityofWashingtonintheU.S.seemstoconfirmthis.Dr.NathanielWatsonwastheleadwriterofthestudy.Watsonsayshisstudyshowsthattheimmunesystemworksbestwhenthebodygetsenoughsleep.Forthestudy>Wats

4、onandhisteamstudied11pairsoftwins.Thisisanimportantdifferencefromothersleepstudies.Otherresearchdidnotstudytwins.Researchersfoundthatthetwinwhosleptlesshadaweakerimmunesystem.Watsonsayshisstudyshowedforthefirsttimethatalong-termlack（缺乏）ofsleepshutsdownpartsofthe

5、immunesystem.Hesayspartsthatmovewhitebloodcellsaroundthebodyareinfluenced.Whitebloodcellsfightinfectionsinthebody.Watson'sstudyprovidesmoreevidence（证据）thatsleepisimportanttoHoverallhealthM•Andsleepisespeciallyimportanttoimmunehealth.Theresearcherspublishedtheirf

6、indingsinthemagazineSleep・Howmuchsleepisenough?Tostayingoodhealth,expertsattheMayoClinicsaythatadultsshouldget7to8hoursofsleep・Teenagersneed9to10hours・Andschool-agedchildrenmayneedmorethan10hoursofsleepanight.Expertssayoursleepbecomespoorinour30s・Bythetimewereac

7、hour50s,theaveragepersonhaslost50percentoftheirabilitytohavearestfulsleep•Thesepeoplealsohavetroublefallingasleepandstayingasleepthroughthenight.Frommiddleageon,theysaytheseproblemsonlygetworse,andtheycaninfluenceourhealth.Signsyoumaynotbegettingenoughsleep•You，

8、rcalwayshungiyoryou^vegainedweight・•Youhavetroublemakingdecisions・•Youhavetroublerememberingthings.•Yourskindoesn'tlookgood・•Youarehavingtroubleseeing.1.Fromthefirstt