A.1mg/m3B.10mg/m3C.100mg/m3D.1000mg/m3
A、3.5-45.5% B、3.5-35.5% C、4.3-45.5% D、4.3-35.5%
A、易溶于水 B、微溶于水 C、不溶于水 D、不溶于乙醇