单项选择题

Why could maglev trains replace short-fight commuter aircraft

A．Maglev trains are faster.
B．Maglev trains are cheaper.
C．Maglev trains are more fuel-efficient.
D．Maglev trains are safer.
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单项选择题
Which countries have probably spent the most money on maglev research
A．France and West Germany.
B．Japan and West Germany.
C．the United States and Japan.
D．West Germany and the United States.
单项选择题
It's ______ of her to refuse to admit that she is wrong; she is very stubborn.
A．characteristic
B．peculiar
C．specific
D．particular
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