本量利图分为（）。
A.正方形本量利图
B.基本的本量利图
C.边际贡献式本量利图
D.园形本量利图
参考答案：A, B, C
---Can I ________ your pen?
----- _________________________.
A．borrow. No, you can’t.
B．use, Give you.
C．borrow, Sure, here you are.
D．use, Sorry, I have one.
The flood washed away the road, so they were ________ from the base.[ ]
A．cut off
B．set off
C．move off
D．put off
