2020 12
H 1 B11 C 12 N 14 O 16 Na 23 Al27 P31 Cl 35.5
242=48
1
A
B
C
D
2
A
B
C
DNOxSO2CO2PM2.5
3
A Al 2(SO4)3
B
C
D SO
2
4
A.
B. ( )
C. (KNO
3) (Na2SO
4)
D. (HgS)