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1、2016年6月英语四级仔细阅读真题及答案解析 SectionC PassageOne Questions46to50arebasedonthefollowingpassage. Decliningmentalfunctionisoftenseenasaproblemofoldage,butcertainaspectsofbrainfunctionactuallybegintheirdeclineinyoungadulthood,anewstudysuggests. Thestudy,w
2、hichfollowedmorethan2,000healthyadultsbetweentheagesof18and60,foundthatcertainmentalfunctions—includingmeasuresofabstractreasoning,mentalspeedandpuzzle-solving—startedtodullasearlyasage27. Dipsinmemory,meanwhile,generallybecameapparentaroundage37.
3、Ontheotherhand,indicatorsofaperson'saccumulatedknowledge—likeperformanceontestsofvocabularyandgeneralknowledge—keptimprovingwithage,accordingtofindingspublishedinthejournalNeurobiologyofAging. Theresultsdonotmeanthatyoungadultsneedtostartworryingabo
4、uttheirmemories.Mostpeople'smindsfunctionatahighlevelevenintheirlateryears,accordingtoresearcherTimothySalthouse. "Thesepatternssuggestthatsometypesofmentalflexibilitydecreaserelativelyearlyinadulthood,butthattheamountofknowledgeonehas,andtheeffecti
5、venessofintegratingitwithone'sabilities,mayincreasethroughoutallofadulthoodiftherearenodispases,"Salthousesaidinanewsrelease. Thestudyincludedhealthy,educatedadultswhotookstandardtestsofmemory,reasoningandperceptionattheoutsetandatsomepointoverthene
6、xtsevenyears. Thetestsaredesignedtodetectsubtle(细微的)changesinmentalfunction,andinvolvesolvingPuzzles,recallingwordsanddetailsfromstories,andidentifyingpatternsincollectionsoflettersandsymbols. Ingeneral,Salthouseandhiscolleaguesfound,certainaspects
7、ofcognition(认知能力)generallystartedtodeclineinthelate20sto30s. Thefindingsshedlightonnormalage-relatedchangesinmentalfunction,whichcouldaidinunderstandingtheprocessofdementia(痴呆),accordingtotheresearchers. "Byfollowingindividualsovertime,"Salthousesa
8、id,"wegaininsightincognitionchanges,andmaypossiblydiscoverwaystoslowtherateofdecline." Theresearchersarecurrentlyanalyzing,thestudyparticipants'healthandlifestyletoseewhichfactorsmightinfluenceage-relatedcognitivechanges. 47.【题干】Whatisthecommonview