单项选择题
On a ship，a fixed carbon dioxide or other approved system must be installed（）.
A.where oil or chemical drums are stored B.in all battery storage locations C.in paint lockers D.in all of the above locations
单项选择题 On a ship，a fire drill shall be conducted once every（）.
单项选择题 On a ship，a cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
单项选择题 On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）
