【单选题】
从建筑外部看不到燃烧部位和火焰时，指挥员应当在组织火情侦察的同时，命令参战人员占领水源，将主要战斗装备摆放在消防车前，做好战斗展开的准备属于___。
A. 准备展开
B. 预先展开
C. 完全展开
D. 全面展开
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【单选题】
当发生火灾的建筑物内部聚集大量的高温浓烟时，为改变火势发展蔓延方向，定向排除高温浓烟，便于救人.灭火，应当选择___引起火势扩大的部位进行破拆。
A. 不会
B. 可能
C. 可以
D. 相应
【单选题】
火势迅速蔓延难以控制时，可以在火势蔓延的___，根据火势蔓延的速度，选择适当位置拆除毗邻火灾现场的可燃建（构）筑物，开辟隔离带，阻断火势蔓延。
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在可能发生爆炸.易燃易爆和毒害物质泄漏.建筑物倒塌等危险情况下救援时，必须进行检测和监测，应当尽量减少一线作业人员，并设立___，加强安全防护，留有机动力量。
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进入火场的所有人员，应当根据危害程度和防护等级，佩戴防护装具，并经___检查.登记；进入火场后应当合理选择进攻的路线.阵地，严格执行操作规程。
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实施水上救援时，救援人员应当佩戴专业救生装具，必要时系安全绳，以___为单位，不得单独行动；实施潜水救援时，严格按照规程操作，并采取安全措施。
A. 中队
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D. 小组
【单选题】
从建筑外部能够看到火焰和烟雾时，指挥员在组织火情侦察的同时，命令参战人员携带战斗装备接近起火部位，铺设水带干线供水，做好进攻准备属于___。
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消防救援队伍应当以辖区灾害事故风险和危害调查评估结果为依据，按照最大.最难.最危险.最复杂情况下灭火与应急救援任务的需要，制定执勤战斗预案，不包括___。
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【单选题】
扑救炼油厂火灾时，对乙烯冷凝设备与管道火灾时，一般不宜___。
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对可能造成水体污染的现场，应当适当控制用水量，尽量减少水渍损失，并组织___及有关部门注意污水排放处置，防止造成水体污染。
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凡是受高温.摩擦.___或是受到一定物质的激发能瞬间发生分解或复分解化学反应，并以机械功的形式在极短时间内放出较大能量的物质，统称为爆炸品。
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【单选题】
危险品是指有爆炸.易燃.毒害.___.放射性等性质，在生产.运输.储存.使用和处理过程中，易造成人员伤亡和财产损毁而需要特别防护的物品。
A. 扩散
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