A.100cfu/mlB.10cfu/mlC.3cfu/mlD.3cfu/LE.100cfu/L
A.0.01mg/L B.0.02mg/L C.0.03mg/L D.0.04mg/L E.0.05mg/L
A.250mg/L B.350mg/L C.400mg/L D.450mg/L E.500mg/L