Accordingtothespeed，Chinesetrainsaredividedintodifferen...
问题详情：Accordingtothespeed，Chinesetrainsaredividedintodifferentclasses，identified（确认）withdifferentlettersandnumbers．Thelettersrefertodifferentclasses． G﹣High﹣SpeedElectricMultipleUnits（EMU）Train Th...