問題詳情

16.__________ means an easily transportable buoy used to temporarily replace an aid tonavigation not watching properly.
(A)Sea buoy
(B)Marker buoy
(C)Sound buoy
(D) Discrepancy buoy

參考答案

答案:D
難度:困難0.333333
統計:A(0),B(0),C(2),D(1),E(0)

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