试题与答案

国家标准规定：对燃油、气锅炉，氮氧化物的允许排放质量浓度不得超过（）。A、1200m

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题型：单项选择题

题目：

国家标准规定：对燃油、气锅炉，氮氧化物的允许排放质量浓度不得超过（）。

A、1200mg/m3

B、500mg/m3

C、400mg/m3

D、100mg/m3

答案：

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