问题
选择题
From April 18,2007，the elevated trains can travel________a speed of 250 kilometers per hour.[ ]
A．in
B．at
C．with
D．for
答案
答案：B
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From April 18,2007，the elevated trains can travel________a speed of 250 kilometers per hour.[ ]
A．in
B．at
C．with
D．for
答案：B