磁盘碎片整理的作用是（24)。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29743' and id < 2415334 and id<>'2415334' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29743' and id > 2415334 and id<>'2415334' order by id asc limit 5