单项选择题
A.contaminating food with extinguishing agent B.spreading through the engineering space C.causing loss of stability D.a grease fire in the ventilation system
A.cooling the outside bulkheads with water B.shutting all sources of air into the compartment C.closing the sea chest D.flooding the compartment with salt water
A.contains 15 pounds of CO2 B.weighs 15 pounds when full of CO2 C.has 15 pounds of pressure at the nozzle D.weighs 15 pounds when empty