题目地面瓦斯抽放泵站室内甲烷传感器报警浓度是( )A. ≥0.5%CH4B. ≥1.0%CH4C. ≥1.5%CH4D. ≥2.0%CH4地面瓦斯抽放泵站室内甲烷传感器报警浓度是( )A. ≥0.5%CH4B. ≥1.0%CH4C. ≥1.5%CH4D. ≥2.0%CH4题目解答答案A. ≥0.5%CH4