![Haveyouevergonetravelingonthetrainthatwasnamedafterthel...]( "Haveyouevergonetravelingonthetrainthatwasnamedafterthel...")
- 問題詳情：HaveyouevergonetravelingonthetrainthatwasnamedaftertheletterD?NamedaftertheletterD,thenewtrainsrunatspeedsof200to250kilometersonehour.ThesearemuchfasterthanZ-typeandT-typetrains.Forexample,itusedtotakepeople12hourstotravelfromShanghaitoBeijin...
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