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1、2019-2020年高考英语一轮复习Unit5Thepowerofnature单元检测卷新人教版选修Ⅰ.阅读理解Thenewfindingsholdthatlessdemandingactivities,suchaslisteningtoclassicalmusic,probablywon’tbringnoticeablebenefitstoanagingmind.“Itseemsitisnotenoughjusttogetoutanddosomething—itisimportanttogetoutanddosomethingthatisunfamiliarandme
2、ntallychallenging,andthatprovidesbroadstimulation（刺激）mentallyandsocially,”saidleadresearcherDeniseParkoftheUniversityofTexasatDallas.Thenewfindingsprovidemuch-neededinsightintothefactorsofeverydayactivitiesthatcontributetocognitivevitality（认知活力）asweage.“Weneed,asasociety,tolearnhowtomain
3、tainahealthymind,justlikeweknowhowtomaintainphysicalhealthwithdietandexercise,”saidPark,“Weknowsolittlerightnow.”“Thisisanassumption,butwhatifchallengingmentalactivityslowstherateatwhichthebrainages?Everyyearthatyousavecouldbeanaddedyearofhigh-qualitylifeandindependence.”Fortheirstudy,Pa
4、rkandcolleaguesrandomlyassigned221adults,aged60to90,toengageinaparticulartypeofactivityfor15hoursaweekoverthecourseofthreemonths.Someparticipantswereassignedtolearnanewskill—digitalphotography,quilting,orboth—whichrequiredactiveengagementandtappedworkingmemory,long-termmemoryandotherhigh
5、-levelcognitiveprocesses.Otherparticipantswereinstructedtoengageinmorefamiliaractivitiesathome,suchaslisteningtoclassicalmusicandpletingwordpuzzles.And,toaccountforthepossibleinfluenceofsocialcontact,someparticipantswereassignedtoasocialgroupthatincludedsocialinteractions,fieldtrips,ande
6、ntertainment.Attheendofthreemonths,Parkandcolleaguesfoundthattheadultswhowereproductivelyengagedinlearningnewskillsshowedimprovementsinmemoryparedtothosewhoengagedinsocialactivitiesornon-demandingmentalactivitiesathome.Thethreelearninggroupswerepushedveryhardtokeeplearningmoreandmasterin
7、gmoretasksandskills.Onlythegroupsthatwerefacedwithcontinuousmentalchallengeimproved.“Ourparticipantsessentiallyagreedtobeassignedrandomlytodifferentlifestylesforthreemonthssothatwecouldparehowdifferentsocialandlearningenvironmentsaffectedthemind,”saidPark,“Peoplebuiltrela
