A.C3S B.C2S C.C3A D.C4AF
A.開(kāi)口孔隙 B.粗大孔隙 C.毛細(xì)孔隙 D.閉口孔隙
A.ρ>ρ0′>ρ0 B.ρ>ρ0>ρ0′ C.ρ0>ρ>ρ0′ D.ρ0′>ρ>ρ0