通常情况下,道路红线在( )地方需要调整。
A.绿化带
B.平面弯道
C.上下坡
D.平面交叉口
参考答案:B,D
解析: 考虑到交叉口视距三角形和弯道视距限界,应选用B和D项。
It has been many years since I was last in London_______I still remember something that happened during that visit.
A.and
B.for
C.but
D.as
透平油有什么作用?