3岁前儿童的记忆一般不能永久保持，这种现象称为 ( )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28331' and id < 2318450 and id<>'2318450' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28331' and id > 2318450 and id<>'2318450' order by id asc limit 5