房间隔缺损的X线表现应该除外下列哪项() ["肺血多","右房右室大","肺动脉段突出","主动脉结增宽","透视可见肺门舞蹈"]
法乐四联症不包括下列哪一种畸形() ["房间隔缺损","室间隔缺损","升主动脉骑跨","右心室肥厚","肺动脉狭窄"]
对人工心脏瓣膜的评价,下列哪项正确() ["机械瓣抗凝治疗1年即可","生物瓣终生不损坏","以上两种瓣组织相容性均差","机械瓣耐久性较好,生物瓣不需终身抗凝治疗","机械瓣易并发感染"]
什么叫极限应力?什么叫应力集中?
张力性气胸不会出现以下哪种情况() ["颈静脉怒张","皮下气肿","气管移位","纵隔扑动","胸廓膨隆"]
公差带的组成要素是什么?