問題詳情
32. Everyvessel shall_____ maintain a proper look-out by sight and hearing as well as by allavailable means appropriate in the prevailing circumstances and conditions so as to make a full 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：適中0.666667
統計：A(6),B(1),C(0),D(2),E(0)