磁盘调度中根据访问者指定的柱面位置来决定执行次序的调度称 。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30252' and id < 2447354 and id<>'2447354' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30252' and id > 2447354 and id<>'2447354' order by id asc limit 5