扩张型心肌病各瓣口常有不同程度的反流， 合理的解释为（     ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25732' and id < 2163096 and id<>'2163096' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25732' and id > 2163096 and id<>'2163096' order by id asc limit 5