题目内容:
Paragraph6___________
A.Effectsofagingonaperson'srecallability B.short-termmemoryversuslong-termmemory
C.retentionasthesecondnecessityformemory
D.likebetweenlearningstrategiesandeffectivememoryskills
E.Significanceofexercisingyourmuscles
F.importanceofstayingintellectuallyactive
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答案解析: