阅读下面的对话完成任务。

A: Excuse me, Susan. （1）Is this your backpack?

B: No, it isn't. It's Jack's. （2）My backpack is green.

A: Is your computer game in the lost and found case?

B: No, it's Jack's. And that white eraser is Jack's, too.

A: Do you know Jack?

B: Yes, I do. （3）他是一个英国男孩。He's in Class One, Grade Seven.

A: Oh, what's his telephone number?

B: 100-2116

A: Is Miss Miller his English teacher?

B: Yes, you're right.

①原子的数目 

②分子的数目 

③元素的种类

④物质的总质量 

⑤物质的种类 

⑥原子的种类．

    朗读分为①____。正确朗读主要解决读音、读法的正确；理解朗读主要解决②____；表情朗读主要使自己在朗读中得到思想的教育、艺术的熏陶。这里的表情指音调表情、面部表情和体态表情。③____，面部喜怒哀乐，体态手舞足蹈。披情入文，情随声出，其声琅琅，其乐陶陶。

下列关于蛋白质工程的设计思路不正确的是(　　)。