操作系统的五大基本功能是（31)。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29742' and id < 2415410 and id<>'2415410' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29742' and id > 2415410 and id<>'2415410' order by id asc limit 5