Science
Junior High
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求解，謝謝🙏，想請問一下（A)為什麽錯
下圖為傳聲筒示意圖,有關傳聲筒的敘述,下列何者正
確?
(A)傳聲筒能夠使人的聲帶發出的音量加大
(B)傳聲筒可以使傳播的聲音速率變快而傳到遠處
(C)傳聲筒是利用反射的原理設計而成的
(D)傳聲筒也可以應用來探測魚群的深度
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