—_______________?

—I’m looking for a T-shirt for hot summer.[ ]

A. What can I do for you ?    

B. Can you help me ?

C. What did you do ?          

D. What can you do for me ?

价值换算法就是用（）来反映班组的经济效果

A.货币量

B.折旧费

C.消耗量

D.利用率