答案：A
( )主要用于制造船舶及化工机械零件。
A．铅黄铜B．锡黄铜C．硅黄铜D．锰黄铜
Fighting a fire in the galley poses the additional threat of（）.
A.contaminating foof with extinguishing agent
B.spreading through the engineering space
C.loss of stability
D.a grease fire in the ventilation system
