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%CH4, B. , ≥1.0%CH4, C. ≥1.5%CH4, D. ≥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%CH4, B. , ≥1.0%CH4, C. ≥1.5%CH4, D. ≥2.0%CH4题目解答答案A