底面半径为r，高为h的圆柱，两底的面积之和与它们的侧面积相等，h与r的函数关系为（     ）

It is believed that universities are a place ________ students ________ skills and knowledge,

not a factory to produce street vendors.[ ]

A.  to equip; with  

B.  equipping; with

C.  to equip; for  

D.  equipping; for