未知题型
火灾防治技术的发展趋势是：()。
- A.轻便.易于携带的监测仪器仪表
B.限制或减少向采空区丢煤
C.早期识别内因火灾
D.针对煤层赋存条件，合理确定开拓方式。
【参考答案】
A,B,C,D
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