The less expensive option of constructing special tracks for high-speed train is utilizing _____________ .
举一反三
- The less expensive option of constructing special tracks for high-speed train is utilizing __________ . A: dedicated lines B: existing lines C: specail lines D: continuous welded rails
- The tracks of high-speed train must have a _______________________.
- 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.
- Organic food grown with natural fertilizers may be less expensive than those foods not utilizing natural fertilizers.