单项选择题
Controls for a fixed carbon dioxide system shall be mounted（）.
A.directly outside the space protected by the system B.as near the gas cylinders as possible C.in the pilothouse D.on the main deck near the bow
单项选择题 Control of flooding should be addressed（）.
单项选择题 Control of fire on a ship should be addressed（）.
单项选择题 Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.
