单项选择题

Why could maglev trains replace short-flight 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
Argonne believes that people should regard maglev transportation as ______.
A．safe, efficient high-speed trains
B．the most exciting form of transportation for the future
C．a kind of aircraft
D．the most economical form of transportation
单项选择题
For a commuter trip of 500 miles, about how much less fuel would maglev train use compared to a small plane
A．25%.
B．50%.
C．75%.
D．80%.
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