A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would pr

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问题 A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would provide a rail link only. (Passage 3)

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答案建大桥的开支要比修隧道大得多,但是在桥上既可以通火车也可以通汽车,而在隧道里却只能通火车。

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