A、<p><span style="font-family: 宋体; font-size: 17.1429px; ">为消防救援创造有利条件</span></p>
B、<p><span style="font-family: 宋体; font-size: 17.1429px; ">及时排除火灾产生的烟气</span></p>
C、<p><span style="font-family: 宋体; font-size: 17.1429px; ">避免或限制火焰和烟气向无火区域蔓延</span></p>
D、<p><span style="font-family: 宋体; font-size: 17.1429px; ">保证人员安全疏散与避难</span></p>