关于空气质量，下列说法正确的有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31898' and id < 2550120 and id<>'2550120' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31898' and id > 2550120 and id<>'2550120' order by id asc limit 5