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【单选题】
人们通常把天然气,石油液化气,煤气可燃性气体叫做煤气。煤气给人们生活带来了许多方便,但如果使用不当也会造成灾难。下列使用方法中不正确的是()A.
使用人工点火的燃气灶具在点火时要坚持“火等气”的原则即先将火源凑近灶具然后再开启气阀
B.
经常保持燃气器具的完好，发现漏气，及时检修。使用过程中遇到漏气的情况，应该立即关闭总阀门，切断气源
C.
燃气使用十分方便，即使燃气器具处于工作状态只要其运行稳定门窗关闭完好人也可以长时间离开
D.
使用燃气器具如煤气炉燃气热水器等，应充分保证室内的通风，保持足够的氧气，防止煤气中毒
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