单项选择题
A.close the static leg filling valve
B.close the overflow tank falling valve
C.reduce the fuel oil pumping rate
D.stop the fuel oil pumping operation
单项选择题 After fuel tanks have been topped off, which of the listed procedures should be followed next?（）
单项选择题 The most critical part of the bunkering operations, which can result in an oil spill, is when the （）
单项选择题 During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）