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)