患者女，51岁，心脏手术后，突感胸痛，结合CT图像，最可能的诊断是（）
A.肺栓塞
B.支气管扩张
C.肺水肿
D.肺癌
E.肺不张
参考答案：A
—He failed his exam again.
—But what did you _____? Had he ever been working hard?
A．think
B．expect
C．consider
D．imagine
使证券的发行交易发挥着调节资本流向的作用的是其 ( )
A．权益性
B．流通性
C．机会性
D．风险性
