单项选择题
A.二氧化碳灭火器用于灭普通火。
B.二氧化碳灭火器用于灭电火。
C.二氧化碳灭火器用于灭油火。
D.二氧化碳灭火器用于灭木质火。
单项选择题 Apart from fire drill, there are also boat drill and emergency drill on board.（）
单项选择题 Crew members taking part in boat drills should muster, wearing warm outer clothing and life-jackets properly secured.（）
单项选择题 Engine room personel should start their fire pumps in engine room and see that full pressure of the fire pumps is built up.（）