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【单选题】
下列关于消除反应历程,叙述错误的是( )A.
叔卤代烃易发生单分子消除反应（E1），有顺反构型时，主要得到Z构型产物
B.
由于单分子消除反应（E1）有碳正离子中间体生成，所以消除产物可能有重排产物
C.
双分子消除反应历程（E2）一步完成，没有碳正离子生成
D.
双分子消除反应历程（E2）要求H-C-C-X处于反式同平面
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