- 阅读理解A
题干：Manyadultsmaythinkthey’regettingenoughshut-eye,butinamajorsleepstudyalmost80percentofrespondentsadmittedtonotgettingtheirprescribedamountofnightlyrest.Researchshowsthatadultsneedanaverageofseventoninehoursofsleepanightforoptimalfunctionality.Bygettinglessthansixhoursofsleepanight,youputyourselfatriskforhighbloodpressure.Whenyousleep,yourheartgetsabreakandslowsdownforasignificantperiodoftime.Butcuttingbackonsleepmeansyourhearthastoworkovertimewithoutitsallottedbreak.Inconstantlydoingso,yourbodymustaccommodatetoitsnewconditionsandelevateyouroveralldailybloodpressure.Andtheheartisn’ttheonlyorganthatisovertaxedbyalackofsleep.Thelesssleepyouget,thelesstimethebrainhastoregulatestresshormones,andovertime,sleepdeprivationcouldpermanentlyhinderthebrain’sabilitytoregulatethesehormones,leadingtoelevatedbloodpressure.Prolongedsleepdeprivationhaslongbeenassociatedwithdiminishedimmunefunctions,butresearchershavealsofoundadirectcorrelationbetween“modest”sleepdeprivation—lessthansixhours—andreducedimmuneresponse.DuringdeepREMsleep,yourmuscles(exceptthoseintheeyes)areessentiallyimmobilizedinordertokeepyoufromactingoutonyourdreams.Unfortunately,thiseffortyourbodymakestokeepyousafewhiledreamingcansometimesbackfire,resultinginsleepparalysis.SleepparalysisoccurswhenthebrainisarousedfromitsRMRcycle,butthebodyremainsinitsimmobilizingstate.Thiscanbequiteafrighteningsensationbecause,whileyourmindisslowlyregainingconsciousness,ithasnocontroloveryourbody,leavingsomewithafeelingofpowerlessness,fearandpanic.Imagineallofyourmemoriesareerased.It’sachillingthought,butthatiswhatalifewithoutsleepwouldbelike.Sleepisessentialtothecognitivefunctionsofthebrain,andwithoutit,ourabilitytoconsolidatememories,learndailytasks,andmakedecisionsisimpairedbyalargedegree.ResearchhasrevealedthatREMsleep,ordream-sleep,helpssolidifythe“fragile”memoriesthebraincreatesthroughoutthedaysothattheycanbeeasilyorganizedandstoredinthemind’slong-termcache.
题目： Which of the following statement is TRUE according to the last paragraph?（） - A 、Memories are part of the cognitive functions of the brain
- B 、Memories created during the daytime are usually fragile and impaired
- C 、You are likely to lose your memories of yesterday after a night’s sleep
- D 、Long-term memory cannot be formed without dream-sleep
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参考答案【正确答案：A】
推理判断。文章最后一段提到“Sleep is essential to the cognitive functions of the brain, and without it, our ability to consolidate memories, learn daily tasks...”从该句话可以推断出记忆是大脑认知功能的一部分，所以选择A，其它各项均与原文不符。
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