护理职业安全中最常见的职业性有害因素是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30905' and id < 2486655 and id<>'2486655' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30905' and id > 2486655 and id<>'2486655' order by id asc limit 5