遇到这种情形怎样行驶？（）
A．停车让对方车辆通过
B．开启左转向灯向左行驶
C．加速超越障碍后会车
D．开前照灯告知对方让行
参考答案：A
开口向下的抛物线y=（m2-2）x2+2mx+1的对称轴经过（-1，3），则m=（ ）。
—Look at the sign on the right.
—Oh, parking ______ here. [ ]
A. doesn't allow
B. isn't allowed
C. didn't allowed
D. wasn't allowed
