問題詳情
【題組】55. In the article, what does "self-sustaining mean"?
(A) Life that exists co-dependently.
(B) Life that exists independently.
(C) Life that exists without nitrogen.
(D) Life that exists without carbon dioxide.
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)