医疗机构不得使用
A．未经注册的医疗器械
B．失效的医疗器械
C．过期的医疗器械
D．无合格证的医疗器械
E．淘汰的医疗器械
参考答案：A,B,C,D,E
—Would you mind answering some questions on shopping habits?
— ________.
A．Yes, with great pleasure
B．No, I am afraid I can't make it
C．Yes, it is worth the time
D．No, as long as it doesn't take long
如患者的二氧化碳结合力为13mmol/L,在应用5%碳酸氢钠静滴时发生手足搐搦，其原因是
A．因纠正酸中毒而引起低血钙
B．高镁血症
C．高钾血症
D．高钙血症
