单项选择题
The term "load on top" is used on many crude oil carriers, is to provide a method for （）.
A.calculating the ullage in the cargo tanks B.loading ballast by gravity C.the loading of new cargo into the slop tank as a procedure to minimize pollution D.calculating the ratio of cargo expansion in a cargo tank
单项选择题 To avoid excessive pressures in the fuel oil filling system during bunkering, you should （）.
单项选择题 Which of the precautions listed should be observed when taking on diesel fuel?（）
单项选择题 Before the seas get rough, it is a good safety practice to （）.
