单项选择题
A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.
A.a low velocity spray applicator B.a water spray or solid stream C.at least two spray patterns of water D.at least 25 psi delivered pressure
单项选择题 A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots. You should（）.
单项选择题 A fire in electrical equipment should be extinguished by using（）.
单项选择题 A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.
