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当瓦斯和空气的混合气体中混入其他可燃性气体时，瓦斯爆炸下限升高。

A、正确

B、错误

时间：2021-07-17 23:34 关键词：安全工程专升本工业通风与除尘 2019级第三学期期末考试

答案解析

A

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