阿摩線上測驗
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
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統計： A(3), B(2), C(2), D(1), E(9) #1819725
統計： A(3), B(2), C(2), D(1), E(9) #1819725
