When is the most critical time of bunkering in regards to oil pollution?（）<br>A:lining up the systems<br>B:topping off <br>C:starting delivery<br>D:connecting hoses and joints

When is the most critical time of bunkering in regards to oil pollution?（）
A:lining up the systems
B:topping off
C:starting delivery
D:connecting hoses and joints

出自：海船船员证

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