我们常说的噪音污染是指（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31814' and id < 2542745 and id<>'2542745' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31814' and id > 2542745 and id<>'2542745' order by id asc limit 5