单项选择题
A.Stop fueling
B.Notify the dispatcher
C.Notify the terminal superintendent
D.Determine if your vessel is the source
单项选择题 If you detect oil in the water around your vessel while discharging fuel, the FIRST thing to do is（）.
单项选择题 When you notice oil on the water near your vessel while taking on fuel, you should FIRST （）.
单项选择题 Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.