正常成人右下肺动脉主干应不宽于多少厘米：

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24997' and id < 2128913 and id<>'2128913' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24997' and id > 2128913 and id<>'2128913' order by id asc limit 5