A、>30%,<90%,≥3×6mm B、<30%,>90%,≥3×6mm C、>30%,>90%,≥3×6mm D、>30%,<90%,<3×6mm
A、10~15% B、8~10% C、8~12% D、>12%
A、<0.02mg/L B、0.02mg/L C、>0.02mg/L D、<1mg/L