（1）烷烃的通式是： ____　．烷烃分子中的碳原子数目每增加一个，其相对分子质量增加　 ____　．

（2）由甲烷制取一氯甲烷的化学方程式 ____．该反应属于 ____反应．

（3）①用系统命名法给 命名： ____．

②写出2，2﹣二甲基﹣3﹣乙基戊烷的结构简式：

读一读，补全对话。

A. Have a cupof tea, Mum.   B. What can I do for Mum?

C. I love you,Mum!       D. Here's a card for you, Mum.

E. Here aresome flowers for you, Mum.

Bob: It's Mother'sDay. ____Ah! I have a goodidea. ____

 Mum: Thank you. I like these flowers.

 Bob: Happy Mother's Day!____

Mum: Thank you. It's a nice card.

 Bob: ____.

Mum: Thank you, my dear.

 Bob: ____

Mum: I love you too.

算式8－7+3－6正确的读法是 (     )

下列关于郑成功是我国历史上著名的民族英雄的说法最恰当的是（    ）。​