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Which of the following actions are stated in the correct order prior to loading or discharging cargo on a Ro-Ro vessel? （）
A:Lower the stern ramp，raise/open the stern door，turn on ventilation for cargo holds
B:Turn on ventilation for cargo holds，raise/open the stern door，lower the stern ramp
C:Turn on ventilation for cargo holds，lower the stern ramp，raise/open the stern door
D:Raise/open the stern door，lower the stern ramp，turn on ventilation for cargo holds

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出自：海船船员证

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