预防急性肺不张,不必要的是()
A.术前禁烟
B.急性呼吸道感染者延期一周手术
C.老慢支病人应行体位引流
D.术中应打开叹气呼吸
E.支气管冲洗
参考答案:E
--Mary, have you got my email? I sent you a birthday card yesterday.
---Oh, really! I haven't ___my mailbox yet.
A.seen
B.checked
C.received
D.answered
客户洗钱风险等级根据划分标准可分为()。
A.低风险
B.中风险
C.高风险
D.无风险