A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.<br>A:posted with instruction on the operation of the systm<br>B:ventilated and equipped with explosion-proof switches<br>C:painted with red and black diagonal stripes<br>D:equipped with a battery powered source of emergency lighting

A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
A:posted with instruction on the operation of the systm
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

出自：海船船员证

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