問題詳情

21. _____ means a tidal current that flows continually with the direction of flow changingthrough all points of the compass during the tidal period.
(A) Continuous current
(B) Reversing current
(C) Cycling current
(D) Rotary current

參考答案

答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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