Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?（）<br>A:Start ventilation，lower the ramp，notify engine room<br>B:Lower the ramp，start ventilation，notify engine room<br>C:Notify engine room，lower the ramp，start ventilation<br>D:Start ventilation，notify engine room，lower the ramp

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

出自：海船船员证

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