2 H O Δ ??? ? CH2=CHCH2OH+NaCl 44. CH2 CH2 Br2 BrCH2 CH2Br NaOH/H2O Δ HOCH2 CH2OH COOH COOH 一定条件 H2O 一定条件CH3CH2OH CH3CH2OH 浓硫酸,Δ COOC2H5 COOC2H5 ........