超市里出售的海鲜周围要铺一层碎冰块，这是因为冰块____ （填物态变化名称） 时，要____（填“放”或“吸”）热，所以能起到保鲜的作用．装着冰鲜鱼的袋子放在空气中一段时间后，袋子的外壁出现了一层水珠，这是____（填物态变化名称）现象．

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均限一词;

2）只允许修改10处，多者(从第11处起)不计分。

Dear Tom,

    It's my honor to share my dream university to you. I'm glad to tell you that my dream university is Peking University, that is one of the best university in the world.

    There are several reasons how I'd like Peking University. At the first, it has first-class teaching staff and equipment, which will help me make progress quickly. Secondly, it is famous for their positive academic atmosphere where students study hardly to meet new challenges. And at last, my brother, who studies there, says he is very satisfying with the university.

    It's not easy enter Peking University, but I think my dream will come true if I worked hard.

    Could you tell me something about your dream university?

Yours,

Li Hua

如图为正常人体细胞的染色体图．请观察后回答：

全球各地现有孔庙1300余座。若研究孔子的教育思想，可以查阅（    ）