单项选择题
Convection spreads a fire by（）.
A.heated gases flowing through ventilation systems B.the transfer of heat across an unobstructed space C.burning liquids flowing into another space D.transmitting the heat of a fire through the ship's metal
单项选择题 Controls for a fixed carbon dioxide system shall be mounted（）.
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（）.
