單項(xiàng)選擇題
A.0.01mg/L B.0.05mg/L C.0.10mg/L D.0.15mg/L E.0.50mg/L
A.<=0.05mg/m3 B.<=0.1mg/m3 C.<=0.15mg/m3 D.<=0.3mg/m3 E.<=0.5mg/m3