实验室获得性感染最常见的暴露途径是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30409' and id < 2458291 and id<>'2458291' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30409' and id > 2458291 and id<>'2458291' order by id asc limit 5