城市轨道线网规划研究的内容主要包括哪些方面?
参考答案:
⑴城市背景研究
⑵线网构架研究是线网规划的核心
⑶实施规划研究是确定轨道交通可操作性的关键
My father works very hard, and he often ___________ quite late. [ ]
A. go home
B. go to home
C. goes home
若a+b=4,那么3a-(5-3b)=( )。