A rate is a ______.
A: speed
B: train
C: fast
D: track
A: speed
B: train
C: fast
D: track
举一反三
- One of the 3 elements of high-speed train is ______ A: speed up to 199km/h B: need for a smaller curve radius C: track made with continuous welded rail D: speed up to 500km/h
- ____is a train and rail system that reaches a high sustained rate of travel. Usually the speed is greater than 200 km/h.
- What are the reasons for people to choose high-speed rail? A: convenient ticket purchasing B: fast running speed C: high punctuality rate D: effortless transfer
- A _______ line is a track used exclusively for a high-speed train. A: train B: track C: welded D: dedicated
- Track circuits detect__1__if a train is occupying a block.