火灾事故
参考答案：
是指由于火灾造成的人身伤亡或物资财产损失的事故。
What he said at the meeting is really _____, so many people were _____. [ ]
A. confused; confusing
B. confusing; confused
C. confused; confused
D. confusing; confusing
预防煤尘爆炸技术措施可分为（）几类。
A.防尘措施
B.救援措施
C.防爆措施
D.隔爆措施
