驾驶机动车在没有交通信号的路口遇到前方车辆缓慢行驶时要依次交替通行。
参考答案：对
函数f（x）=3x-4x3，x∈[0，1]的最大值为______．
Please go _________the ship quickly. There is only fifteen minutes left.
A．on the board
B．to aboard
C．on aboard
D．Aboard
