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1、2012高考英语二轮复习专题限时训练专题限时训练(二十七) [科普知识型阅读理解(一)](限时：25分钟)(一)Ifyouseeastudentnapping(打瞌睡)inthelibrary,don’trollyoureyes.NewresearchfromtheUniversityofCalifornia,Berkeley,showsthatanhour’snapcanconsiderablyimproveandrestoreyourbrainpower.Indeed,thefindingssugges
2、tthatanapnotonlyrefreshesthemind,butcanmakeyousmarter.“Sleepnotonlyrightsthewrongofextendedwakefulnessbutitmovesyoubeyondwhereyouwerebeforeyoutookanap.”saidMatthewWalker,anassistantprofessorofpsychologyatUCBerkeleyandtheleadinvestigatorofUCBerkeleysleepstu
3、dies.Thelateststudysuggeststhatthebrainmayneedsleeptoprocessshorttermmemories,creating“space”fornewfactstobelearned.Intheirexperiment,39healthyadultsweredividedintotwogroups—napandnonap.Atlastitshowedthatthenappersimprovedtheirscoresby10percentonaverageaft
4、ersleeping;thescoresofthosewhodidn’tnapactuallydroppedby10percent.Theresultssupportpreviousdatafromthesameresearchteamthatstayingupallnight—acommonpracticeatcollegeduringmidtermsandfinals—decreasestheabilitytomemorizenewfactsbynearly40percent,duetoashutdow
5、nofbrainregionsforlackofsleep,saidWalker.“Sleepisneededtoclearthebrain’sshorttermmemorystorageandmakeroomfornewinformation.”saidWalker.“It’sasthoughtheemailinboxinyourbrainisfulland,untilyousleepandclearoutthoseemails,you’renotgoingtoreceiveanymoreemails.”
6、However,ProfessorDerkJanDijk,thedirectoroftheSurreySleepResearchCentre,saidthattherewasnoclearevidencethatdaytimenappingofferedadistinctadvantageoversleepingsoundlyjustonceover24hours.“Thesleepwakecycleisnotasfixedaswemightthink—wehavethecapabilitytosleepi
7、ndifferentways.”saidProfessorDerkJanDijk.7用心爱心专心“Thesizeoftheseeffectsismuchmoredifficulttojudge—ifIhavetolearnsomething,forexample,it’seasiertodothiswhenI’mfeelingawakeandreadythanwhenI’msleepy.”headded.( )1.AccordingtoUCBerkeley’snewfindings,thebenefito
8、fanapisthat________.A．ithelpstofixanapper’ssleepwakecycleB．itmakeshardlearningtasksnotdifficultanymoreC．itallowsthebraintomakeroomfornewlearningD．itgivesnapperschancestocleartheirmemorystorage( )2.MatthewWal
