According to the passage, the speeds at which a train must travel to qualify as “high-speed”______________.
举一反三
- According to the passage, the speeds at which a train must travel to qualify as “high-speed”______________. A: has the same standard B: is above 250 km/h C: vary from country to country D: was set in 1990
- The speeds at which a train must travel to quality as “high-speed” vary form country to country, ranging from _______ km/h to over ________ km/h.
- The speed of high-speed train is over ( ).
- Which of the following is a possible cause of the event "the high speed train is underdeveloped in the US"? A: Americans don't like the high speed train. B: Highway network is advanced. C: The geography is unsuitable for the high speed train. D: The high speed train damages environment.
- High-speed trains travel at 300 kilometers an hour, which is about __________ normal trains. A: four times the speed as B: the speed four times of C: four times as the speed of D: four times the speed of