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2-丁烯的结构简式正确的是
A.CH2=CHCH2CH3 B.CH2=CHCH=CH2
C.CH3CH=CHCH3 D.CH2=C=CHCH3
2-丁烯的结构简式正确的是:
A.
CH2=CHCH2CH3
B.
CH2=CHCH=CH2
C.
CH3CH=CHCH3
D.
CH2=C=CHCH3