观察《对外开放示意图（局部）》，我国最早设置经济特区的省份是

A: Hello! May I speak to David, please?

B: Hello! This is David speaking. Who's t____?

A: Simon speaking. What are you going to do tomorrow?

B: I have no i____. Do you have any plans?

A: Yes. Shall we go to the zoo?

B: Good idea. We can see different kinds of animals there. A____ them, I like pandas best.

A: So do I. I can't wait to see them. B____ the way, can we feed the pandas?

B: No, I'm afraid not. It may h____them.

A: I see. Can you take your c____ with you? Mine is broken.

B: No problem. How can we get there?

A: The No.8 bus can take us there.

B: When shall we meet?

A: Let's m____ it half past eight in the morning.

B: All right. See you then at the school gate.

A: See you.

①f（﹣x）=﹣f（x）；

②f（ $\frac{2x}{1+x^2}$ ）=2f（x）

③|f（x）|≥2|x|

其中的所有正确命题的序号是（   ）

                                                                                              赵孟頫过扬州
         元盛时，扬州有赵氏者，富而好客。其家有明月楼，人作春题，多未当意者。一日，赵子昂过扬，主人知之，迎致楼上，盛筵相款，所用皆银器。酒半，出纸笔求作春题。子昂援笔书云：“春风阆苑客三千，明月扬州第一楼。”主人得之，喜甚，尽撤酒器以赠。
       【注释】①元：元朝。②春题：春联。③阆苑：传说中神仙居住的地方。此为赞美明月楼。
       【文化常识】赵孟頫其人。上文说到的“赵子昂”，即元朝书画家赵孟頫，字子昂，号松雪道人。他的字圆转遒丽，世称“赵体”，与“颜体”、“柳体”等并驾齐驱。他还善于诗文、工于篆刻，是个多才多艺的文人。

根据短文内容，选择正确答案。

    Library of Congress (国会）is in the United States. This library is the largest library in the world. It is 3 stories high and the book shelves in it are 500 kilometers long.

    Resources

    The library has a large collection of resources like newspapers，magazines, CDs, videos and CD-ROMs. There are also many rooms for people to meet each other or listen to music. It also has a language learning center. It gets 2,000 questions a day, and some can be answered in a few minutes. Some need more time, sometimes a few months. All workers in the library use computers to help them.

    How to join

    If you are a middle school or above, then you can come to the library and fill in a form. Don't forget to bring your ID card. You must be an American and live in the United States.

    If you have time, come along to America and take a look around for yourself!