单项选择题
A.at most references
B.at least references
C.maximum standards
D.minimum standards
单项选择题 Annex IV of MARPOL 73/78 contains regulations for the prevention of （）.
单项选择题 The SOLAS Convention in its successive forms is generally regarded as the most important of all international treaties concerning the （） of merchant ships.
单项选择题 The port state control inspection is carried out on the basis of the following international conventionsAmong them, which one was not set by IMO?（）