单项选择题
Sour crude oil（）.
A.contains high quantities of hydrogen sulfide B.is diluted with other products for carriage C.is lighter than other crudes D.is less hazardous to load than other crudes
单项选择题 Releasing oil from the sea anchor of a survival craft may（）.
单项选择题 Reid vapor pressure is（）.
单项选择题 Regulations require that tankers handling grade B liquids shall have their cargo pumps separated from all sources of vapor ignition by（）.
