题目
指出下列哪些是碳链异构___________;哪些是位置异构______________;哪些是官能团异构_______________。A.CH3CH2COOH B.CH3-CH(CH3)-CH3 C.CH2=CH-CH=CH2 D.CH3COOCH3 E.CH3-CH2-C≡CH F.HCOOCH2CH3 G.CH3C≡CCH3 H.CH3-CH2-CH2-CH3 答案:B和H;E和G、D和F ;若x的多项式8x2-3x+5与3x3+2mx2-5x+3相加后,不含x2项,则m等于( )A.2B.-2C.-4D.-8