单项选择题
On a ship，firefighting equipment must be inspected once every（）.
A.three months
B.six months
C.twelve months
D.eighteen months
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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（）.
A.week
B.month
C.crew change
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On a ship，a cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
A.posted with instructions on the operation of the system
B.ventilated and equipped with explosion-proof switches
C.painted with red and black diagonal stripes
D.equipped with a battery powered source of emergency lighting
