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
单项选择题 A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.
单项选择题 A fifteen-pound CO2 extinguisher（）.
单项选择题 Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be（）on board until the vessel’s Certificate of Inspection expires.