启动混合泵后泵的流量不足，属于泵的原因是（）。

A.转速不够

B.叶轮破损或有淤塞

C.吸入管或轴封漏气

D.管路静压升高

Speaker A: Excuse me, sir. Can you tell me where the bus stop for Hyde Park is
Speaker B: ().

A. Of course. I’m glad to tell you where it is.

B. Yes. Turn right and walk two blocks and you’ll find a bus stop sign.

C. Sorry, I’m too busy to lead you to the nearest bus stop.

D. Just a moment. I have to figure out the best way to get there.