85 -20lg(20/1)
    20 -20lg(20/1)
    [3.9×1.3×24+3.6×2.2×2+3.3×1.3×3+（3.9×1.3×17+3.6×2.2+3.3×1.3）×9+2.2×1.8×2+1.28×8.2] ×0.1
    368.94×0.3×0.6
    （1.38×22+2.28×2）×10+1.38×11+2.28×2
    1054.41×0.1
    3.9×1.3×24+3.6×2.2×2+3.3×1.3×3+（3.9×1.3×17+3.6×2.2+3.3×1.3）×9+2.2×1.8×2+1.28×8.2
    769.5×0.3×0.15
    3.9×24+3.6×2+3.3×3+（3.9×17+3.6+3.3）×9
    3.9×1.3×15+3.6×2.2+3.3×1.3×3+（3.9×1.3×17+3.6×2.2+3.3×1.3）×9
    arcsin0.87
    arcsin0.87
    (5*(16600^2)*755.21)/(48*(17.7*10^8))
    (2*5*558.0696*(16600^2))/(48*0.95*3.35*(5.4056*10^8))
    (2*5*558.09696*(16600^2))/(48*0.95*3.35*(5.4056*10^10))
    2*(5*(558.0696*10^6)*16600^2)/(48*0.95*(3.35*10^4)*(5.4056*10^10))
    281250+450000+112500+281250+2250000+337500+2250000=
    1125000×1.00×0.5×0.8
    1125000×1.00×0.25=
    281250+450000+11250+281250+2250000+337500+2250000=

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