If there is nothing to absorb the energy of sound waves, they travel on ___

問題詳情

7.If there is nothing to absorb the energy of sound waves, they travel on ____ , but their intensity ____ as they travel further from their source.
(A)erratically – mitigates
(B)eternally – alleviates
(C)forever – increases
(D)steadily – stabilizes
(E)indefinitely – diminishes

參考答案

答案：E
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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