| | | | | | | | | | | | ⑴ | | | | | | | ⑵ | 3 | 7 | | | 3 | | | 2 2 | | | | | III II | I 3 | I | | AQI 200 24 | PM2.5 115 24 24 | | | | III AQI 200 48 | | | II AQI 200 72 | | I AQI 200 | 96 AQI 300 48 | AQI 500 | | |