問題詳情

55. According to the passage, what might cause problems for smart roads?
(A) The glass roads might not be strong enough.
(B) The cost of building the smart roads is too high.
(C) The batteries might not last very long.
(D) They only have limited potential outside the US.

參考答案

答案:B[無官方正解]
難度:適中0.538462
統計:A(1),B(7),C(2),D(1),E(0)

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