25. ______ is an electrical device and can be used to measure the depth of the water.
(A) Decca
(B) Loran
(C) Hydrophone
(D) Echo sounder

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統計: A(1), B(9), C(42), D(553), E(0) #2051385

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說明如下: (A) Decca 德卡系...
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