1mol某气态烃最多可与2mol的HCl发生加成反应，所得产物与Cl2发生取代反应，若将氢原子全部取代，需要8mol的Cl2，则该烃的结构简式可能为（ ）
| A．CH≡CH | B．CH3-C≡CH |
| C．CH3-CH═CH-CH3 | D．CH3-C≡C-CH3 |
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