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【单选题】
关于气态危险化学品的灭火,说法错误的是:
A.
输气管道泄漏着火，首先扑灭火源，再堵漏
B.
如果火势中有压力容器或有受到火焰辐射热威胁的压力容器，能疏散的应尽量在水枪的掩护下将这些压力容器疏散到安全地带，不能疏散的应部署足够的水枪进行冷却保护
C.
扑救气体火灾切忌盲目扑灭火势，即使在扑救周围火势以及冷却过程中不小心把泄漏处的火焰扑灭了，在没有采取堵漏措施的情况下，也必须立即用长的点火棒将火点燃，使其恢复稳定燃烧
D.
遇有火势熄灭后较长时间未能恢复稳定燃烧或受热辐射的容器安全阀火焰变亮耀眼、尖叫、晃动等爆炸征兆时，必须适时作出准确判断，及时下达撤离命令
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