慢性肺心病最常见的病因是（）
A.重症肺结核
B.先天性肺囊肿
C.支气管扩张
D.慢性阻塞性肺病
E.支气管哮喘
参考答案：D
—Do you know how to get to Peterson Building, please?
—______.[ ]
A. Don't ask me
B. Yes. You can take the No.3 bus
C. You're welcome
D. Thank you all the same
二尖瓣狭窄患者可在哪个部位触及震颤
A．心尖部
B．剑突下
C．胸骨右缘第3-4肋间
D．胸骨右缘第2肋间
E．胸骨左缘第2肋间
