—Do you watch sports every day?

—No, I don't. _____ I play ping-pong _____ tennis every day. So I can play them well. [ ]

A. But, or        

B. And,  but    

C. But,  and    

D.  And,  or

钟面式百分表也能在某些机床或测量装置中用作（）和指示。

A.定位 

B.定心 

C.平行