单项选择题
A.③>②>④>① B.②>③>①>④ C.③>④>①>② D.④>①>③>②
A.③>④>②>① B.③>②>④>① C.③>④>①>② D.④>③>①>②
A.(CH3)2CHCl B.CH3CH2CH2Cl C.(CH3)3CCl D.CH3Cl