关于“两类危险源”，下列说法不正确的是（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24809' and id < 2121301 and id<>'2121301' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24809' and id > 2121301 and id<>'2121301' order by id asc limit 5