（课标通用）2018版高考英语大一轮复习Unit4Pygmalion课时作业新人教版选修8

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1、Unit4PygmalionI•阅读理解Weighingtoomuchcandamageyourhealth,andobesityisagrowingproblemforbothkidsandadultsaroundtheworld.Sleepmightbeoneanswertotheproblem・AnewstudyhasfoundthatelementaryschoolstudentswhoslepttooIittleweremorelikelytogainpounds.Paststudieshaveshownalinkbetweensleepinglessandweighingm

2、ore,butscientistshavehadatoughtimedeterminin£"whichcamefirst,thechickenortheegg,”saysJulieC.LumengoftheUniversityofMichiganinAnnArbor.Inotherwords,ithasn，tbeenclearwhetherkidswhoweightoomuchhavetroublesleeping,orwhethersleepinglessleadstoweightgain.Bothscenarios（W能出现的情况）seemedequallypossible.Tog

3、etabetterideaofwhichcauseswhich,Lumengandhercolleaguesinterviewedtheparentsof785thirdgradersfromaroundtheUnitedStates.Theparentsansweredquestionsabouthowwel1theirkidssieptthatyear.Threeyearslater,theparentsansweredthesamequestions.Bysixthgrade,18percentofkidsinvolvedinthestudywereobese.Thescient

4、istsfoundnorelationshipbetweenweightandthestudents'raceorgonder.Italsodidn'tmatterhowstricttheirparentswere,orwhethertheywereboysorgirls.Obesitystruckallofthesegroupsequally.Instead,sleepseemedtobethekeyfactor.Overthe3yearsofthestudy,thechiIdrenaveragedahealthy9.5hoursofsleepanight.Somekids,howe

5、ver,sleptalotmore一orless一thanothers.Forthesixthgraders,everyhourofsleepabovethe9.5—houraverage—waslinkedtoa20percentlowerriskofbeingobese.Sleepappeareddoublyimportantforthethirdgraders・Everyextrahourofsleeptheygotwaslinkedtoa40percentdropinobesity.1-WhatdoestheunderlinedsentenceinParagraph2imply

6、?A-Scientistshavefoundtheexactcausesofchildren，sobesity.B.Thereisalwayssomethingdifficulttounderstandthroughtheory.C.Thecause・effectrelationshipbetweenweightandsleepisntclear.D.Apersosweighthassomethingtodowiththeamountofhissleep・2-Whatdidtheinterviewfindout?A・9.5hoursofsleepanightisenoughforchi

7、ldren・B.Themoreachildsleeps,thehealthierhewillbe.C.Sixgradersneedmuchmoresleepthanthirdgraders・D