阅读材料，回答问题。
材料一 清乾隆帝致英国国王乔治三世信函中的几句话：“天朝物产丰盈，无所不有，原不籍外夷货物以通有无。”
——人教版《中国历史》七年级下册
材料二 某条约规定：……开放广州、厦门、福州、宁波、上海等通商口岸……
——人教版《中国历史》八年级上册
材料三  1980年，我国在广东的深圳、珠海、汕头和福建的厦门建立四个经济特区。1984年，我国开放了广州、上海、大连等14个沿海城市，随后又开放了长江三角洲、珠江三角洲、环勃海地区等经济开放区。
——人教版《中国历史》八年级下册

(Some classmates are talking about their weekend.)

    Linda: I stayed at home and studied over the weekend. I studied for my English test on Saturday. Yesterday I wrote a geography paper. In the evening I talked to my pen pal (笔友) on the phone. What did you do?

Tim: I had a good time. On Saturday morning I played tennis, in the afternoon I went to the beach, and in the evening I went to Nancy's birthday party. On Sunday I went to the mountains with my friends.

Mary: Oh, your weekend was great. But mine was boring. I stayed at home the whole (全)weekend. I cleaned my room and washed my clothes. I even watered the flowers. And only in the evening I watched TV for a short time. Did you go out, Dave?

Dave: No, I didn't. I stayed at home and watched TV on Saturday. Yesterday I watched a movie on TV, Fearless. It was very exciting.