活动头磁盘存储器的平均寻址时间是指 。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29992' and id < 2430579 and id<>'2430579' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29992' and id > 2430579 and id<>'2430579' order by id asc limit 5