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單項(xiàng)選擇題

Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?()

A.Start ventilation,lower the ramp,notify engine room
B.Lower the ramp,start ventilation,notify engine room
C.Notify engine room,lower the ramp,start ventilation
D.Start ventilation,notify engine room,lower the ramp

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