What is the total railway mileage of China by the end of 2017?

中国大学MOOC: By 1910, the US topped the world in railway mileage at over _______ miles.

中国大学MOOC: Generally the vehicle must be returned in the same condition it was rented in, and often may exceed mileage restrictions.

I would like to know if the mileage has been added to my membership account?此处旅客在表达的诉求是

Existing low gas mileage vehicles will be ______ phased out over the next five years until transition to more fuel efficient new models is complete. A: accidentally B: gradually C: extremely D: occasionally

Of all the high-speed railway systems in the world, CRH has ( ) A: the most comprehensive system technology B: the strongest integration capability C: the longest operating mileage D: the highest operating speed E: the largest scale of construction

Which of the following is part of a positive feedback mechanism associated with global climate change? A: increase in the gas mileage of cars B: increase in the cloudiness caused by more moisture in the atmosphere C: melting of Arctic sea ice D: increase in the acidity of seawater E: increase in the growth of CO2 absorbing trees and grasses