問題詳情
38.If there has no crew was changed within last four months, the ISPS drills should be conducted.
(A)at least once
(B)at least once within last six month
(C)at least once in a year
(D)twice within eighteen months
參考答案
答案：A
難度：簡單0.862069
統計：A(125),B(10),C(5),D(5),E(0)