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January June July December Which month had the highest absorption concentration? February July August November Which month hadthe lowestabsorptionconcentration? January April September December Which month hadan absorptionlevel closest to 60ppm? 33 ppm 43 ppm 53 ppm 63 ppm Which figure appears to be the best estimate for the chemical absorption concentration in March? 71 ppm 79 ppm 81 ppm 89 ppm Which figureappears to be thebest estimate forthe chemicalabsorptionconcentrationin October? |