我国地铁车辆全轴距约为________m

轨道在修车辆数一般为运用车辆的_____比较合适。

地铁轨道与地面铁路轨道基本相似，我国采用标准轨距________mm，以使与铁路相互配合，更好利用我国铁路的技术、设备。

Which do you think is ________, health or wealth？

_______________will not continue if an ongoing operation is changed or deletedA、

新生儿溶血病换血时，换血量为____________________，约为婴儿全血量的________________倍。

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

And they can ______their passports______，making leaving or “escaping” virtually impossible.

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

长沙轨道交通远景规划中共有_____条线路

“三全”是指______全、______全、______全。