停电时观测指示器的表现（）。
A、风向无指示风速有指示
B、风向有指示风速无指示
C、风向风速均无指示
参考答案：A
切开引流的橡胶管消毒用（）
A.高压蒸汽灭菌
B.煮沸
C.干热
D.流动蒸汽
E.消毒液浸泡
A fire in the galley always poses the additional threat of（）.
A.contaminating food with extinguishing agent
B.shutting all sources of air into the compartment
C.closing the sea chest
D.a grease fire in the ventilation system
