“非稳态的，由极核城市向较低等级城镇逐步发展的城镇体系”是城

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问题单项选择题

“非稳态的，由极核城市向较低等级城镇逐步发展的城镇体系”是城镇体系演化的哪个阶段的特征( )

A．低水平阶段

B．极核发展阶段

C．扩散阶段

D．高水平的均衡阶段

答案

参考答案：C

情景交际

补全对话

根据对话内容, 从对话后的选项中选出能填入空白处的最佳选项.选项中有两项多余选项.

— Hi, Zhang Lan. You look so nice in the red skirt.

— Thank you very much.

— __1__

— In Qingdao.

— Qingdao?__2 _

— Last week. I went there with my family.

— How long did you stay there?

— __3__We went sightseeing in many places.

— We all know the beaches of Qingdao are very beautiful.__4__

— Yes. When I was lying on the beach, I felt so cool and relaxed.

— __5__

— I'm sure you'll love to.

A. I'll come back soon.

B. For a whole week.

C. Where did you buy it?

D. Why did you go to Qingdao?

E. I hope to visit it one day.

F. When did you go there?

G. Did you go there?

单项选择题

磁铁矿石按矿石的次生氧化程度可划分为混合矿石、氧化矿石、（）三类。

A．次生矿石

B．原生矿石

C．金属矿石