問題詳情
33. In cases where more than 25 percent of ship’s personnel has been changed, for the sakeof safety, 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：適中0.5
統計：A(9),B(12),C(2),D(1),E(0)