CTCS2-200H型列控车载设备主机与外部连接的连接端，用来外接110V电源的是（）。
A.CN0
B.CN1
C.CN2
D.CN3
参考答案：B
Explain the meaning of the following terms with regard to the law of agency, providing specific examples within the context of company law:
(b) implied authority; (3 marks)
一梯形断面渠道，截面积w=7.2m2，水力半径R=0.803m，粗糙系数n=0.0192，通过的流量为8.1m3/s，则渠道底坡i为（）。
A．0.025
B．0.028
C．0.000779
D．0.000625
