問題詳情
40. Every vessel shall ___________maintain a proper look-out by sight and hearing as well asby all available means appropriate in the prevailing circumstances and conditions so as to make afull appraisal of situation and of the risk of collision.
(A) at all times
(B) often
(C) sometimes
(D) usually
參考答案
答案：A
難度：非常簡單0.9
書單：沒有書單，新增