下列烷烃的结构式错误的是__________。
·<img src=\"https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1650078527938_cd218a99b847412199f9035bae58fdf6.png\" class=\"mw-100\">
·<img src=\"https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1650078532058_c2e9df3299404954b6a6440acfb2cc8a.png\" class=\"mw-100\">
·<img src=\"https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1650078536664_6ef6247db43d4dfdb5d99fe22ee95cb8.png\" class=\"mw-100\">
·<img src=\"https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1650078541038_edd5998c5c5c4d65b456ccbe1fd2fd69.png\" class=\"mw-100\">
出自:新疆工程学院发电厂电气部分(专升本)