单选题
Why could maglev trains replace short-flight commuter aircraft?
A) Maglev trains are faster. C) Maglev trains are more fuel-efficient.
B) Maglev trains are cheaper. D) Maglev trains are safer.
A、
Why could maglev trains replace short-flight commuter aircraft?
B、
Maglev trains are faster.
C、
Maglev trains are cheaper.
D、
Maglev trains are more fuel-efficient.
E、
Maglev trains are safer.
【正确答案】
C
【答案解析】
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