問題詳情

51 ________of energy has become a very important policy for many countries due to the limited resources.
(A)Affirmation
(B)Fascination
(C)Conservation
(D)Observation

參考答案

答案:C
難度:適中0.403226
統計:A(6),B(12),C(25),D(13),E(0)

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