选择定位基准时，尽量（）。
A.以平面定位
B.以孔定位
C.以设计基准定位
D.以测量基准定位
参考答案：C
Which of the following statements concerning coupon rate structures is FALSE （）
A. Step-up notes have coupon rates that increase over time at a pre-specified rate.
B. Accrual bonds have only one cash inflow at maturity.
C. Accrual bonds, like zero-coupon bonds, always sell at a discount to face value.
计算机网络都有哪些类别？各种类别的网络都有哪些特点？
