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13 於無反射音場中,如空曠之戶外,點音源之傳播衰減,距離每增加一倍,聲音衰減多少 dB(分貝)?(A) 1 dB (B) 2 dB (C) 3 dB (D) 6 dB
問題詳情
13 於無反射音場中,如空曠之戶外,點音源之傳播衰減,距離每增加一倍,聲音衰減多少 dB(分貝)?
(A) 1 dB
(B) 2 dB
(C) 3 dB
(D) 6 dB
參考答案
答案:D
難度:適中0.68
統計:A(0),B(1),C(4),D(17),E(0)
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8. My landlord didn't renew my _____ contract, so I need to find a new place to live. (4/21)(A)
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【題組】29. The speech ________ by the small business owner was greater than what we had imagined.(A)mak
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