— Can I look at the menu for a few more minutes before I decide?

— Of course.________, sir. [      ]

A. Make yourself at home  

B. Enjoy yourself

C. It doesn't matter  

D. Take your time

对旋转零件作消除不平衡量的工作称为（）。

A.静平衡

B.动平衡

C.静不平衡

D.平衡