城市商业银行应设立在（）级以上城市。
A.省
B.地
C.县
C.乡
参考答案：B
When he ____home,he saw his mother cleaning the room.[ ]
A. gets back
B. got back
C. had got back
D. has got back
在进行设备购买与设备租赁方案经济比较时，应将购买方案与租赁方案视为( )。
A．互斥方案B．相关方案C．独立方案D．组合方案
