单项选择题
A.CH3CH2Cl B.TsOCH3 C. D.CH3COOH
A.(1)(2)(5) B.(3)(4)(5) C.(1)(2)(3)(4) D.(1)(2)(3)(4)(5)
A.RCl<RF<RBr<RI B.RF<RBr<RI<RCl C.RF>RCl>RBr>RI D.RF<RCl<RBr<RI