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