Hainan owns the world’s first island train looping high-speed train line. ( )
举一反三
- The speed of high-speed train is over ( ).
- existing line/dedicated line A The high-speed train runs exclusively on a(n) . B The high-speed train shares a(n) .
- The high-speed train runs exclusively on a(n) __________________. A: existing line B: dedicated line
- The main factors which affect the pressure wave when two high-speed trains meet: A: The speed of the meeting trains B: The streamline degree of train C: Line spacing D: Train marshalling form E: Train power distribution form F: Train traction power supply mode
- 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.