胸骨旁左室长轴M型收缩期主动脉瓣右冠 瓣和无冠瓣开放间距为（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27181' and id < 2251912 and id<>'2251912' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27181' and id > 2251912 and id<>'2251912' order by id asc limit 5