問題詳情

39.In cases where more than 25 percent of ship’s personnel has been changed, for the sake ofsafety, you had better conduct the drills within .
(A)24 hours
(B)seven days
(C)one month
(D)three months

參考答案

答案：B
難度：簡單0.7
統計：A(7),B(28),C(4),D(1),E(0)