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【单选题】
引起心肌收缩力下降的最常见病因是( )
A.
肺栓塞
B.
主动脉瓣狭窄
C.
急性心肌梗死
D.
原发性高血压
E.
急性大失血
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A.
He tells her honestly what he thinks about it.
B.
He refuses to eat it.
C.
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B.
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C.
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D.
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A.
Hello, my name is John Smith.
B.
Hello, I'd like to sit beside my friend. Can you arrange that for us?
C.
Good morning. Nice to meet you.
D.
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