阿摩線上測驗
39.In cases where more than 25 percent of ship’s personnel has been changed, for the sake
of safety, you had better conduct the drills within .
(A)24 hours
(B)seven days
(C)one month
(D)three months
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統計： A(132), B(228), C(38), D(6), E(0) #781439
統計： A(132), B(228), C(38), D(6), E(0) #781439
