题目内容

脑栓塞最常见病因是（）

A. 风心病二尖瓣狭窄
B. 低血压
C. 高血压
D. 心律失常
E. 脑动脉粥样硬化

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[音频]W=WaiterG =GuestG: Waiter! This meat is (1)! It's enough to (2)in your head.W: Perhaps you'd like to (3), sir. The steak is (4).G: Ok, man. I think I'll have the steak.W: How (5)your steak cooked?G: （6）for me, please.

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