75.Which of the following statements is true?
(A) Traditional railroads are no longer in use.
(B) Airlines will lose their customers to high-speed rails because of speed.
(C) High-speed rail is defined as having a speed of over 200kilometers per hour.
(D) High-speed rail companies will replace all land transporters.

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統計： A(0), B(7), C(23), D(0), E(0) #667150