There is someone _________ the door.[ ]
A. in
B. on
C. to
D. at
答案：D
Sir, you are not allowed to enter the building if you don't get our manager's ________.[ ]
A．permission
B．connection
C．instruction
D．introduction
证券公司财务管理的目标是( )。
A．防范风险
B．保持流动性
C．每股收益最大化
D．公司价值最大化
