情景对话。从II 栏中找出I 栏句子的正确答语。

I栏                

( ) 1. What’s your hobby, Tom?        

( ) 2. Do you like singing and dancing?

( ) 3. Can you play football, David?    

( ) 4. How do you spell “black”, Tom?

( ) 5. Where’s my basketball, Dad?

II栏

A. Yes.

B. Under the bed.

C. I like singing and dancing.

D. No, but I can play basketball.

E. B-L-A-C-K.

开启式压缩机组成的制冷系统，系统的COP是指（）

A.制冷机的制冷量与同一工况下制冷压缩机的轴功率的比值

B.制冷压缩机的制冷量与同一工况下制冷压缩机电机的输入功率的比值

C.压缩机的制热系数与同一工况下制冷压缩机的轴功率的比值

D.压缩机的制热系数与同一工况下制冷压缩机电机的输入功率的比值