下列电机中属于同步电机的是（）。

A.油剂泵电机

B.空调水泵电机

C.预热炉风机电机

D.油剂输送电机E.计量泵电机

Speaker A: What are you and Joe doing this weekend, Michelle Would you be free to come over for drinks after dinner sometime

Speaker B: ().

A. No, no. I think you and Mike should come over for dinner.

B. Hey, thank you, Pat. That sounds nice. I don’t think we have made any plans yet.

C. It’s hard to decide now.

D. We are doing nothing this weekend. What about you