問題詳情

4.As energy sources, petroleum and coal are not_____________meaning that once they areused up, they are gone.
(A)renewable
(B)universal
(C)disposable
(D)replaceable

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)