問題詳情

60. Regarding space colonies, which of the following is NOT seen as attractive to NASA?
(A) Scarcity of resources.
(B) Microgravity and vacuum.
(C) Abundant solar power.
(D) Alternative power sources.

參考答案

答案:A[無官方正解]
難度:適中0.428571
統計:A(6),B(4),C(2),D(2),E(0)

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