下列物质长期露置在空气中，质量不会增加的是（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19695' and id < 1705792 and id<>'1705792' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19695' and id > 1705792 and id<>'1705792' order by id asc limit 5