单项选择题
A vessel’s Derat Certificate is always issued by （）.
A.Classification Society B.Cargo Survey Bureau C.Environmental Protection Agency D.Public Health
单项选择题 The certificate of pratique certifies that （）.
单项选择题 The vessel’s Loadline Certificate is always issued by （）.
单项选择题 Official proof of a Chinese vessel’s nationality is contained in the （）.
