問題詳情
20.( )有一艘海底探測船，若以等速向西行駛，每隔一段時間利用聲納探測海底深度一次，其回聲接收時間依序為20 秒、30 秒、40 秒、30 秒、5 秒、20 秒，則海底地形應為下列何者？
(A) 
(B) 
(C) 
(D) 
參考答案
無參考答案
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