????
???????????ж?????????????????????6.4????
????
?????й?????????? ?????? ?? ???? ?????????????????Σ???????????????????????????ж???????????
??????3??18?????????????????????????Ρ???????PM2.5?????????????????????19?????磬????????PM2.5??????????????140mg????????С???????????145mg????????Э??138mg???????????????148mg??????????137mg?????????????142mg????????????152mg??????????????AQI????????У???????????????????????????????Э???????????????????????????ж???????????????PM2.5??????????????????????????????????????????????????PM10??????????????????棬??????????????????6.4????
?????л??????????????????????????????й???????????????????й????????????????й??λ?????????????????????????????????????С???
?????α???????? |