单项选择题

患者，男，70岁。患慢性支气管炎8年，高血压3年。今晨排便时，突感右胸部刀割样疼痛，随即出现胸闷、呼吸困难，最可能的原因是（）

A.突发冠心病
B.急性胸膜炎
C.急性心包炎
D.自发性气胸
E.心脏神经官能症

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听力原文：W: Excuse me, Prof. Davidson. But I was hoping to talk to you about my class project for economies.
M: I have a class in a few minutes. Why don't you come and see me during office hours tomorrow?
Q: When will the woman discuss her project with Prof. Davidson?
(13)
A．Before economics.
B．In about an hour.
C．The next day.
D．During economics class.

A.
M:
B.Before
C.
B．In
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服用硫糖铝的最佳时间为（）

A.餐前2小时
B.餐前1小时
C.餐时服用
D.餐后1小时
E.餐后2小时