A.摩爾分數(shù) B.質(zhì)量百分數(shù) C.體積百分數(shù) D.比例
A.0.015% B.0.1% C.3% D.5%
A.烷烴 B.正構(gòu)烷烴 C.異構(gòu)烷烴 D.烯烴