A.0.0030% B.0.0020% C.0.0025% D.0.0133%
A.越黑越好 B.越白越好 C.越平越好 D.越光越好
A.與導(dǎo)熱系數(shù)成正比 B.與導(dǎo)熱系數(shù)成反比 C.與導(dǎo)熱系數(shù)無關(guān) D.與質(zhì)量成正比