______is a device attached to a rail to prevent it from creeping in the direction of train travel.
A: flat bottom rail
B: ullhead rail
C: ail ancho
D: aseplate
A: flat bottom rail
B: ullhead rail
C: ail ancho
D: aseplate
C
举一反三
- A _________________has a wider foot and narrower head. A: flat bottom rail B: ullhead rail
- ____is a train and rail system that reaches a high sustained rate of travel. Usually the speed is greater than 200 km/h.
- Don’t let your rails creep over time. Rail anchors protect against the forces of train traffic and weather.What do rail anchors protect against? A: Broken baseplates . B: Joint wear. C: Welding accidents. D: Creeping rails.
- High-speed rail is a passenger train system.
- The cost of the air fare is higher than ______. A: the rail fare B: that of the rail fare C: those of the rail fare D: which of the rail fare
内容
- 0
High-speed rail is a _____ train system. A: goods B: passenger
- 1
High-speed rail is a _____ train system. A: goods B: passenge
- 2
Interest in rail travel waned after World War II and by the late _______ the train was in decline. A: 1930s B: 1940s C: 1950s D: 1960s
- 3
What is the benefit of floating a wheelset in the bogie? A: It allows the wheelsets radial movement B: It fixes the wheelset rigidly. C: It allows the train to travel faster. D: It reduces vibrations from the wheel/rail interface.
- 4
The electricity can be got from( ),( )or an on-board energy storage device A: the line B: the overhead line C: a third rail D: the cable