明渠的净孔高是指（）至基础顶面的距离。
A、轨面
B、轨底
C、基础底面
D、承台底
参考答案：B
. You had better take enough money with _________ while you ___________.
A．yourself, were shopping
B．yourself, are shopping
C．you, are shopping
D．you, were shopping
怎样识别社会上的假道士？
