单项选择题
A.explosimeter B.oxygen indicator C.fresh air indicator D.all of the above
An oxygen indicator will detect （）.A.concentrations of ...
单项选择题An oxygen indicator will detect （）.
A.concentrations of explosive gas B.an oxygen deficiency in a space C.the presence of harmful amounts of carbon monoxide D.All of the above
The term "oily mixture", as defined in the Pollution Pr...
单项选择题The term "oily mixture", as defined in the Pollution Prevention Regulations includes （）.
A.sludge B.oily ballast water C.bilge slops D.All of the above
The term "oil", as used in the Pollution Prevention Reg...
单项选择题The term "oil", as used in the Pollution Prevention Regulations, means （）.
A.fuel oil only B.crude oil only C.liquefied petroleum gas D.petroleum oil of any kind
