小气道是指吸气状态下内径小于多少的细 支气管（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27186' and id < 2253286 and id<>'2253286' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27186' and id > 2253286 and id<>'2253286' order by id asc limit 5