单选题The term "load on top" is used on many crude oil carriers, is to provide a method for （）.Acalculating the ullage in the cargo tanksBloading ballast by gravityCthe loading of new cargo into the slop tank as a procedure to minimize pollutionDcalculating the ratio of cargo expansion in a cargo tank
单选题
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
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