[简答]  选择题　　Isthat6a.m.wokeoutgettinginthewayofgoodsleep?Don'tthinkyourfatcellswon'tnotice.AnewstudypublishedinTheAnnalsofInternalMedicine(amedicaljournal)findsthatinadequateshut-eyehasaharmfuleffectonfatcells,reducingtheirabilitytorespondtoinsulin(胰岛素)byabout30percent.Overthelong-term,thisdecreasedresponsecouldsetthestagefortype-2diabetes(amedicalconditioninwhichsomeonehastoomuchsugarinhisorherblood),fattyliverdiseaseandweightgain.　　Thestudyaddstoagrowingbodyofevidencethatthere'“anintimaterelationshipbetweentheamountofsleepwegetandourabilitytomaintainagood,healthybodyweight,”sayssleepexpertHeleneEmsellem,directoroftheCenterforSleepandWakeDisordersinChevyChase,Maryland.ButAmericansdon'tseemtobegettingthemessagethatweneedseventoninehoursparnight.Morethan1in5ofus,accordingtoareportfromtheCentersforDiseaseControlandPrevention,isgettingsixorfewerhoursofsleeppernight,onaverage.　　SohowdidresearchersstudyfatcellsintheAnnalspaper?MatthewBradyoftheUniversityofChicagoandagroupofcolleaguesselectedandpersuadedsevenvolunteerstotakepartintheresearchproject.Theywereallyoung,thinandhealthyandagreedtosleepforeightnightsinasleeplab.“Forfournightstheywereallowedtostayinbedfor8.5hoursanight,”saysBrady.Then,amonthlater,theycamebackforfouradditionalnights——butthistimetheywereallowedjust4.5hoursofsleeppernight.Andaftereachvisit,researchersgotasampleoftheirfat.Bradyexplainsthatthefatcellsrespondedsignificantlytothelossofsleep.“Iwasverysurprisedtobehonest,”hesays.　　Badthingscanhappenwhenfatcellsbecomelessresponsivetoinsulin.“Fatcellsareactuallyyourfriend,”hesays.“They'retheretostorelipids(血脂).”Whenlipidsstayinsidethecells,yourbodycanutilizethefatwhenyou'reexercisingorsleepingorgoingaboutyourday.“However,whenfatcellsstaretobecomeinsulinresistant,thelipidsstartoleachoutofthefatcellsandriseinthebloodstream,”Bradysays. 　　1.Accordingtothepassage,lackofsleepforalongwhilecanprobablyleadtoallofthefollowingEXCEPT.　　A.heartdisease　　B.weightgain　　C.diabetes　　2.Themainideaofthethirdparagraphis .　　A.howtowriteamedicalresearchpaper　　B.howtoavoidsleeploss　　C.howtheresearchwasconducted　　3.Whatdoesthe“leach”inthelastparagraphprobablymean?　　A.Leap.　　B.Lead.　　C.Leak.　　4.WhichofthefollowingisNOTTRUEaccordingtothepassage?　　A.Wewillbeintroubleifourfatcellsbecomelessresponsivetoinsulin.　　B.Moreandmorestudiesaredonetostudythelinkbetweensleepandweight.　　C.Morethan20%ofAmericansarenotgettingenoughsleep.　　5.Whichofthefollowingisanappropriatetitleforthispassage?　　A.PoorSleepMayLeadtoTooMuchStoredFatandDisease　　B.SleepExpertsHadExcitingFindingsinaFatStudy　　C.AmericansShouldHaveMoreThanSixHoursofSleep