单项选择题
A.there are two certificated tankermen on each vessel
B.the vessel is equipped with constant-tension winches
C.discharge containment equipment (i.e. drip pans) are in place
D.All of the above
单项选择题 Of the following，the most important consideration for a tanker is（）.
单项选择题 Notwithstanding the provisions of this Regulation，the segregated ballast conditions for oil tankers less than 150 meters in length shall be to the（）of the Administration.
单项选择题 Litmus paste is used in order to determine（）.