截水沟长度一般不宜超过500m，其平、纵转角处应设曲线连接，其沟底纵坡应不小于（）。
A．0．2%
B．0．4%
C．0．5%
D．0．3%
参考答案：D
Consider a 1-year quarterly-pay $1000000 equity swap based on 90-day London Inter-bank Offered Rate (LIBOR) and an index return. Current LIBOR is 3.0 percent and the index is at 840. Below are the index level and LIBOR at each of the four settlement dates on the swap.（）
A.Q1
B.Q2
C.Q3
D.Q4
在磨合期内，（）换档，避免猛烈撞击。
