A: My apartment is only 10 minutes’ walk from the office. Why don’t you drop by some timeB: ().

A. Because I didn’t know you live so close by.

B. Because I didn’t want to bother you.

C. I’d love to. Can I take my roommate along

D. That’s OK. I’ll be there soon.

离心式水泵运行中应经常检查（）。

A.电机温升和电流；

B.出口压力；

C.有无异声、震动；

D.轴承温升和润滑。