单项选择题

A．portion
B．percentage
C．proportion
D．fraction
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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.
单项选择题
A．in whichB．from whichC．of whichD．by which
A．in which
B．from which
C．of which
D．by which
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