【多选题】
正压式消防氧气呼吸器由哪几个系统组成？___
A. 供氧系统
B. 正压呼吸循环系统
C. 安全及报警系统
D. 壳体背带系统
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答案
ABCD
解析
暂无解析
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扑救易燃液体和其他有可能发生流淌燃烧的火灾时，消防车的作战位置应设在火灾现场的___，消防人员应当从（B）的地方建立进攻起点，延伸进攻路线
A. 相对高处
B. 地势较高
C. 地势较低
D. 相对低高处
【多选题】
狭小空间撤离时机与方法___
A. 保护人员连续拉动安全绳1次，发出撤离收绳信号，保护人员缓缓收绳
B. 救援人员到达狭窄通道转弯处时，拉动安全绳1次，发出停止收绳信号，保护人员停止收绳。然后救援人员继续匍匐前进，通过转弯处后连续拉动安全绳2次发出撤离收绳信号，保护人员缓缓收绳
C. 当救援人员通过狭窄通道到达出口，迅速撤离到安全区域
D. 保护人员连续拉动安全绳2次，发出撤离收绳信号，保护人员缓缓收绳
【多选题】
单杠梯使用的注意事项___
A. 单杠梯适用于狭窄区域或室内登高作业，还可跨沟越墙和代替担架使用
B. 单杠梯的最大使用人数为一人，安全使用角度为70度～76度
C. 灭火救援中，单杠梯从消防车上卸下后，应放置在建筑物安全地带。选取竖梯地点时，地面应平整坚实、不滑
D. 使用时，竖梯要注意掌握平衡，不要用力过猛，防止梯子损坏。在确保梯脚稳固不滑动时，方可逐级攀登
【多选题】
射流变换的操作要求___
A. 参训消防员必须穿着灭火防护服，佩戴相关个人防护装备
B. 右手握住水枪，左手握住多功能水枪旋转开关
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【多选题】
一级化学防护服为___连体式全密封结构，由大视窗的等组成。同正压式消防空气呼吸器、消防员呼救器及通信器材等设备配合使用
A. 连体头罩、化学防护服、内置正压式消防空气呼吸器背囊
B. 化学防护靴、化学防护手套
C. 密封拉链、超压排气阀
D. 通风系统
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警告标志的基本型式___，型式的参数：外边a1＝）（C）；内边a2＝0.700a1；
A. 正六边形边框
B. 正三角形边框
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【多选题】
跨区域灭火与应急救援行动中，参战的___在现场作战指挥部的统一领导下实行本系统内的纵向逐级指挥。
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B. 企业专职消防队；
C. 专业抢险队；
D. 其他协同力量；
【多选题】
关于战评总结，下列说法正确的是___。
A. 公安消防中（大、支）队独立完成执勤战斗任务的战评与总结，通常由本级首长负责组织；，
B. 两个以上公安消防中（大、支、总）队共同完成执勤战斗任务，由上一级首长或者部门负责组织；
C. 特别重大火灾，由上一级首长或者部门负责组织；
D. 典型灾害事故的灭火与应急救援战斗行动，由上一级首长或者部门负责组织
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