問題詳情
17.The conservation of energy is of great ____ to all human beings on earth.
(A) acquisition
(B) significance
(C) humility
(D) gratitude
(A) acquisition
(B) significance
(C) humility
(D) gratitude
參考答案
答案：B
難度：非常困難0
統計：A(1),B(0),C(0),D(1),E(0)
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