單項(xiàng)選擇題C2H5ONa在無(wú)水乙醇(55℃)中與下面鹵代烴按SN2反應(yīng)生成醚的快慢速度順序是()a.CH3CH2Brb.CH3CH2CH2Brc.(CH32CHCH2Brd.(CH33CCH2Br

A.abcd
B.bacd
C.cabd
D.dabc


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