单项选择题
A.1B.2C.3D.4
A.氯苯B.4-氯环己烯C.1-氯环己烯D.3-氯环己烯
A.腈B.胺C.醇D.醚
A.R-CH=CH-CH2-X〉R-CH=CH-X〉RCH2-XB.R-CH=CH-X〉R-CH=CH-CH2-X〉RCH2-XC.R-CH=CH-X〉RCH2-X〉R-CH=CH-CH2-XD.R-CH=CH-CH2-X〉RCH2-X〉RC6H5-X
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