单项选择题
The term OIL as used in the Oil Pollution Regulations means（）.
A.fuel oil B.sludge C.oil refuse D.All of the above
单项选择题 The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
单项选择题 The radiotelegraph alarm signal is（）.
单项选择题 The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.
