下列关于群落演替的叙述，错误的是

根据对话情景, 在横线上填入适当的单词补全对话。

A: Mary, what do you ____ of your new school?

B: I like it very much. But there are too ____ rules.

A: What are the rules?

B: First, girls can't have long hair.

A: What? That's really an ____ rule.

B: Interesting? I think it's awful.

A: Do you have to cut your hair?

B: Yes, I do.

A: What ____ rules does your school have?

B: We can't ____ sunglasses. I can't stand (容忍)that. Sunglasses are my favorite.

A: That's a terrible rule.

某钢铁厂于19世纪初建在N地，20世纪80年代将炼铁厂从N地迁至M地，炼钢厂仍留在N地（如下图所示）。该钢铁厂所用的铁矿石一直依赖进口，图中河流可通航。读图，完成下列问题。