问题
单项选择题
By regulation, cargo tanks must be inert before and during what operation?().
A.Stripping
B.Loading
C.Cleaning
D.Crude oil washing
答案
参考答案:D
By regulation, cargo tanks must be inert before and during what operation?().
A.Stripping
B.Loading
C.Cleaning
D.Crude oil washing
参考答案:D