第二题l2=(∑E2)12E1=A/S1所有a=1 Ac As S2 A1 PM10 A1 PM2. 5 Apb 8.68 1.96 1.89 3.74 1.158 0.0283 0.5 0.15 0.15 0.15 0.065 0.0015 E2301370170738158760621.671317388355951 2=(301.3696+170.7378+ 158.7600+621.6711+ 3173879+3559511)1=4388第二题I2 =（ ∑Ei 2 ）1/2 Ei = Ai /Si 所有 = 1 Ai AS1= 8.68 AS2= 1.96 AN2 = 1.89 APM10 = 3.74 APM2.5 = 1.158 APb = 0.0283 Si 0.5 0.15 0.15 0.15 0.065 0.0015 Ei 2 301.370 170.738 158.760 621.671 317.388 355.951 I2 = （ 301.3696+170.7378+ 158.7600+621.6711+ 317.3879+355.9511）1/2 = 43.88