关于肺动脉瓣狭窄。
肺动脉瓣狭窄常见的并发症为
A．缺氧发作
B．细菌性心内膜炎
C．肺炎
D．脑脓肿
E．脑血管血栓
参考答案：B
He raised his gun, pointed it at a bear and _____aim, shot at it.
A．took careful
B．taking careful
C．to take careful
D．taken careful
药学技术人员的道德义务是
A．以建设为中心
B．以经济为中心
C．促进医药发展
D．对病人高度负责
E．以病人为中心
