A _________________has a wider foot and narrower head.
A: flat bottom rail
B: ullhead rail
A: flat bottom rail
B: ullhead rail
A
举一反三
- ______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
- 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
- High speed rail has the advantage over automobile in that______________.
- British Rail has ___________ become more commercial over the past decade.
- Where is the measuring position of the uneven gauge in our country？ A: 10mm below the rail top surface B: 12mm below the rail top surface C: 14mm below the rail top surface D: 16mm below the rail top surface
内容
- 0
High –speed rail is public transport by rail at speeds in excess of ________ km/h.
- 1
Which is the first high-speed rail in the world to use the BDS?（ ）。 A: The Datong-Qinghuangdao Railway B: The Beijing-Guangzhou High-speed Rail C: The Harbin-Dalian High-speed Railway D: The Beijing-Zhangjiakou High-speed Rail
- 2
isthe surface on which the wheels move. A: toe B: unning rail C: stock rail
- 3
The ________ can support the sides of a coach. A: ody B: cant rail C: dome D: waist rail
- 4
What is the main purpose of the report? A: to compare high-speed rail lines B: to propose building high-speed rails C: to explain the development of high-speed rail D: to discuss the design of high-speed rail