21.Oil tankers of 70,000 tonnes deadweight and above delivered after 31 December 1979, shall be provided with at least () slop tanks.
A.1 B.2 C.3 D.4正确答案B
21.Oil tankers of 70,000 tonnes deadweight and above delivered after 31 December 1979, shall be provided with at least () slop tanks.
A.1 B.2 C.3 D.4正确答案B