摘要：R-H+X2R-X+HX CH4+Cl2CH3Cl+HCl CH3Cl+Cl2CH2Cl2+HCl CH2Cl2+Cl2CHCl3+HCl CHCl3+Cl2CCl4+HCl + HO-NO2NO2+ H2O + Br2Br + HBr CH3-CH2-Br + H2OCH3CH2OH + HBr 2CH3─CH2OHC2H5OC2H5 + H2O

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