左心衰竭时最早出现的症状是（）。 A.呼吸困难 B.咳嗽、咯痰、_爱下问搜题

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问题单项选择题 A1型题

左心衰竭时最早出现的症状是（）。

A.呼吸困难

B.咳嗽、咯痰、咯血

C.肝-颈静脉反流征阳性

D.急性肺水肿

E.少尿

答案

参考答案：A

选择题

— How did you play in the match?
— Well, our team was ahead by 2 to 0 during the first half, but we _____ in the last ten minutes.

A. had lost
B. have lost
C. were losing
D. lost

单项选择题

风机外壳至墙壁或其他设备的距离不应小于（）mm。

A.300

B.400

C.500

D.600