80∶      =400∶50（    ）

对号入座．

青藏高原____       1.聚宝盆

柴达木盆地____      2.世界屋脊

三江源____         3.台湾硅谷

新竹园____         4.中华水塔

判断，对的写"正确"，错的写"错误"。

    Hi, I'm Cathy. Today is Ann's birthday. I'm going to her birthday party. But my old dress is too small for me now. I want a new one.

Now I'm in the store. Wang Ling is there too. She is buying a gift to Ann. She is buying a toy panda. The dresses in the store are beautiful, there are many colors. I like the red one. Red is my favorite color. But it's too expensive; it's eighty-five yuan! That pink one looks good, too. And it's just right for me! It's cheap, it's thirty-two yuan. And I buy a gift for Ann, too. It's a whistle.

    I'm wearing my new pink dress to Ann's birthday party. Ann likes the whistle a lot and she likes the toy panda, too.

资料分析：

资料一：如图两只狐，一个是生活在寒冷的北极的极地狐，另一个是生活在炎热的非洲沙漠地区的沙漠狐．

资料二：科学工作者在南极研究中发现，在南极，由于冰雪融化，长期被冰冻的种子解冻萌发，在这里出现了新的物种；从南极冰盖钻取样芯分析表明：25年来，南极气温上升了1度．这些都说明一个现象：地球在变暖．根据以上资料分析：