单项选择题

A．Indifferent.
B．Surprised.
C．Worried.
D．Confident.
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单项选择题
A．It is more comfortable than a conventional train.B．It doesn’’t require much track maintenance.C．It doesn’’t remain in any station very long.D．It carries more passengers than a conventional train.
A．It is more comfortable than a conventional train.
B．It doesn’’t require much track maintenance.
C．It doesn’’t remain in any station very long.
D．It carries more passengers than a conventional train.
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