空气质量指数 | 0~35 | 35~75 | 75~115 | 115~150 | 150~250 | ≥250 |
空气质量类别 | 优 | 良 | 轻度污染 | 中度污染 | 重度污染 | 严重污染 |
A.20 | B.15 | C.10 | D.5 |
A.=5,s2<2 | B.=5,s2>2 | C.>5,s2<2 | D.>5,s2>2 |
8 | 7 | 9 | | | | |
9 | 0 | 1 | 2 | 3 | 4 | 6 |
A.161 | B.162 | C.163 | D.164 |
A.65辆 | B.76辆 | C.88辆 | D.95辆 |
© 2017-2019 超级试练试题库,All Rights Reserved.