单选题
综合类
2016-02-15
Paragraph 4__________
A．The main components of the maglev train system
B．High-speed maglev due to zero friction
C．The working principle of the maglev train
D．Differences between polarity and magnetic field
E．Comparison of maglev trains with traditional ones
F．Maglev with a powerful motor
参考答案
E
答案解析
第四段就磁浮列车和传统火车进行了比较：磁浮列车没有发动机而传统火车有发动机。选项E用comparison来概括是准确的。
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A．The main components of the maglev train system
B．High-speed maglev due to zero friction
C．The working principle of the maglev train
D．Differences between polarity and magnetic field
E．Comparison of maglev trains with traditional ones
F．Maglev with a powerful motor
A．The main components of the maglev train system
B．High-speed maglev due to zero friction
C．The working principle of the maglev train
D．Differences between polarity and magnetic field
E．Comparison of maglev trains with traditional ones
F．Maglev with a powerful motor
A．to develop a maglev train rail system
B．to explain why maglev trains are faster
C．to pull and push the train forward
D．to create a magnetic field
E．to experiment with the maglev train
F．to travel from Paris to Rome in about two hours