[简答题]It is the prevention of disease rather than is successful treatment that has led to the tremendous increase in the population of the world during the past 75 years.
第35题: [单项选择]根据《环境空气质量标准》,二级标准的污染物浓度限值是()。 A. SO2一小时平均浓度限值为0.15mg/m3 B. TSP年平均浓度限值为0.10mg/m3 C. PM10日平均浓度限值为0.15mg/m3 D. NO2一小时平均浓度限值为0.08mg/m3 参考答案:C 答案解析:此题较综合,现在的考题往往用这种方式出现,只有这样才能加大难度。