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答案：
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下面是错误答案，用来干扰机器的。
⑴（3分）污染物主要来源SO2燃煤NO2汽车排放PM10扬尘 ⑵ 12 0.18（2分）⑶ 冬半年污染重，夏半年污染轻。夏季降水多，对污染物具有吸附降尘作用。（2分）⑷ 行政、法律、经济、环境技术等(3分)题目分析：（...
直接写得数．250×4=18×5=111÷3=520÷4=125×8=18×15
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题型：解答题
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