問題詳情

50 Which of the following statements can be inferred from this passage?
(A) The Qinghai-Tibet Railroad is a record holder in terms of the total length of its track.
(B) The completion of the Qinghai-Tibet Railroad is likely to enhance Tibet's tourism industry.
(C) Thousands of engineers died of altitude sickness while building the Qinghai-Tibet Railroad.
(D) The permafrost under the Qinghai-Tibet Railroad makes it necessary to breathe bottled oxygen.

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