（）原则是基金管理人内部部门和岗位的设置应当权责分明、相互制衡。
A.独立性
B.健全性
C.相互制约
D.成本效益
参考答案：C
一个圆柱体底面积不变，高扩大2倍，侧面积______，体积______．
---Has Tom finished his homework?
---I don’t know. But he _________ it the whole morning.
A．did
B．does
C． was doing
D． is doing
