网络丰富了青少年学生的生活，但也带来了一些困扰与问题。一些网友就此展开了讨论，现请你跟帖发言，参与其中。

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    We all know that Taiwan is considered as the Treasure Island of China. It is very beautiful. Recently we have been closely connected. Several months ago, a group of 19 Taiwanese children flew to Chengdu in order to begin a tour to study pandas. The middle school children were from Chiayi County in southwest Taiwan and were chosen because of their excellent performances at school. During the visit, the children saw pandas up close. They were very excited to see so many pandas at the same time. The children also traveled to the Mount E'mei scenic area and met local school children. At last, they said, “The pandas are very cute, and we are all happy.” They also said the children in Chengdu were very friendly to them, and they all liked there. They hoped to visit Sichuan again.

感冒流行季节，为预防传染病的发生，班主任要求学生，一是上学期间注意体育锻炼，二是回家后注意多吃牛肉、鸡蛋等高蛋白物质，这两项措施的目的分别属于（　　）

在自然界中有一些物理现象属于物态变化，请将下列变化对应的物态变化名称填到相应的横线上：洒在地上的水变干了____ ，初春的早晨大雾弥漫____ ，放在衣柜里的卫生球变小了____