提示慢性阻塞性肺气肿的体征是()
A.心脏相对浊音界缩小或叩不出
B.双下肺湿啰音
C.剑突下示心脏抬举性搏动
D.肺动脉瓣区第二心音亢进
E.颈静脉怒张
参考答案:A
______a nurse, she knew how to take care of a patient.
A.Been
B.Being
C.To be
D.Be
The boys succeeded______swimming across the river. [A] at [B] with [C] in