高考英语一轮复习 unit 5 the power of nature单元检测卷[新人教版]选修6

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1、Unit5ThepowerofnatureⅠ.阅读理解Thenewfindingsholdthatlessdemandingactivities,suchaslisteningtoclassicalmusic,probablywon’tbringnoticeablebenefitstoanagingmind.“Itseemsitisnotenoughjusttogetoutanddosomething—itisimportanttogetoutanddosomethingthatisunfamiliarandmentallychallenging,andt

2、hatprovidesbroadstimulation（刺激）mentallyandsocially,”saidleadresearcherDeniseParkoftheUniversityofTexasatDallas.Thenewfindingsprovidemuch-neededinsightintothefactorsofeverydayactivitiesthatcontributetocognitivevitality（认知活力）asweage.“Weneed,asasociety,tolearnhowtomaintainahealthymin

3、d,justlikeweknowhowtomaintainphysicalhealthwithdietandexercise,”saidPark,“Weknowsolittlerightnow.”“Thisisanassumption,butwhatifchallengingmentalactivityslowstherateatwhichthebrainages?Everyyearthatyousavecouldbeanaddedyearofhigh-qualitylifeandindependence.”Fortheirstudy,Parkandcol

4、leaguesrandomlyassigned221adults,aged60to90,toengageinaparticulartypeofactivityfor15hoursaweekoverthecourseofthreemonths.Someparticipantswereassignedtolearnanewskill—digitalphotography,quilting,orboth—whichrequiredactiveengagementandtappedworkingmemory,long-termmemoryandotherhigh-

5、levelcognitiveprocesses.Otherparticipantswereinstructedtoengageinmorefamiliaractivitiesathome,suchaslisteningtoclassicalmusicandcompletingwordpuzzles.And,toaccountforthepossibleinfluenceofsocialcontact,someparticipantswereassignedtoasocialgroupthatincludedsocialinteractions,fieldt

6、rips,andentertainment.Attheendofthreemonths,Parkandcolleaguesfoundthattheadultswhowereproductivelyengagedinlearningnewskillsshowedimprovementsinmemorycomparedtothosewhoengagedinsocialactivitiesornon-demandingmentalactivitiesathome.Thethreelearninggroupswerepushedveryhardtokeeplear

7、ningmoreandmasteringmoretasksandskills.Onlythegroupsthatwerefacedwithcontinuousmentalchallengeimproved.“Ourparticipantsessentiallyagreedtobeassignedrandomlytodifferentlifestylesforthreemonthssothatwecouldcomparehowdifferentsocialandlearningenvironmentsaffectedthemind,”saidPark,“Pe

8、oplebuiltrelationshipsandlearnedn