A.≥3.43kPa B.≥4.90kPa C.≥6.00kPa D.3.43-4.90kPa
A.<15mg/m3 B.<10mg/m3 C.10-15mg/m3 D.15-20mg/m3
A.0.1MPa B.0.01MPa C.0.5MPa D.0.05MPa