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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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 【站僕】摩檸Morning:有沒有達人來解釋一下?
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39.In cases where more than 25 percent o..-阿摩線上測驗