二氧化硫是我国当前大气中分布较广、影响也较大的主要污染物之一,时常以它作为大气污染的主要指标。在《环境空气质量标准》中,其一级、二级、三级的日平均标准分别为()。A、0.05mg/m3,0.15mg/m3,0.25mg/m3B、0.02mg/m3,0.06mg/m3,0.10mg/m3C、0.15mg/m3,0.50mg/m3,0.70mg/m3D、0.06mg/m3,0.15mg/m3,0.50mg/m3
二氧化硫是我国当前大气中分布较广、影响也较大的主要污染物之一,时常以它作为大气污染的主要指标。在《环境空气质量标准》中,其一级、二级、三级的日平均标准分别为()。
- A、0.05mg/m3,0.15mg/m3,0.25mg/m3
- B、0.02mg/m3,0.06mg/m3,0.10mg/m3
- C、0.15mg/m3,0.50mg/m3,0.70mg/m3
- D、0.06mg/m3,0.15mg/m3,0.50mg/m3
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二氧化硫是我国当前大气中分布较广、影响也较大的主要污染物之一,时常以它作为大气污染的主要指标。在《环境空气质量标准》中,其一级、二级、三级的日平均标准分别为()。A0.05mg/m3,0.15mg/m3,0.25mg/m3B0.02mg/m3,0.06mg/m3,0.10mg/m3C0.15mg/m3,0.50mg/m3,0.70mg/m3D0.06mg/m3,0.15mg/m3,0.50mg/m3
填空题生活污染源主要是民用炉灶和供水供热锅炉,数量多,分布广,烟气低空排放,主要污染物是(),对局部地区的大气影响较大