下列（ ）为操作系统软件。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31910' and id < 2551270 and id<>'2551270' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31910' and id > 2551270 and id<>'2551270' order by id asc limit 5