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CH3CH＝CH2 CH2＝CH2 CH≡C—CH3 CH3CH2CH＝CH2
CH3CH2CH3 CH2=CH2 CH3CH=CH2 CH3CH2CH=CH2
CH2＝CH2 CH3CH3 CH3CH＝CH2 CH3CH2CH＝CH2
CH2=CH2 CH3CH=CH2 CH3CH3 CH3CH2CH=CH2
CH2＝CH2 CH3CH＝CH2 CH3CH3 CH3CH2CH＝CH2
最多和 2 体积氯化氢加成生成氯代烷烃，1mol 此氯代烃能和 6molCl2 发生取代反应，生成物中只有碳、氯两种元素，则A.的化学式为 （ ） A.C3H4 C2H4 C4H6 C2H2
CH2===CH2 CH3CH3 CH3CH===CH2 CH3CH2CH===CH2
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CH2=CH2 CH3CH=CH2 CH3CH3 CH3CH2CH=CH2
CH2=CH2 CH3CH=CH2 CH3CH3 CH2=CH—CH=CH2
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