早上,我看见厨房的墙壁上湿漉漉的,走近细看,瓷砖上面沾满了细密的小水珠。这些小水珠是从哪儿来的呢?人会出汗,动物会出汗,难道墙壁也会出汗?一连串的问题在我的脑海里闪过。我百思不得其解,只好跑去问妈妈:“墙壁‘出汗’了,真奇怪!为什么呀?”妈妈神秘一笑,没有告诉我答案,只是说:“你自己去弄明白。”我四处寻找答案。资料显示,原来墙壁“出汗”和天气有关。下雨前,空气很潮湿,有许多我们看不见的水蒸气飘浮在半空中。这些水蒸气的温度比较高。当遇到温度比它低的瓷砖时,这些水蒸气就会凝 In the morning, I saw the wet wall of the kitchen, closer look, tile covered with small droplets of fine water. Where do these small drops come from? People sweat, animals sweat, can the walls sweat? A series of problems flashed through my mind. I baffled, had run to ask her mother: “Wall sweat ’, and really strange! Why ??” Mommy mysterious smile, did not tell me the answer, just say: “You figure it out. ”I am looking for the answer. Data show that the original wall “sweating ” and the weather. Before it rains, the air is wet and there are many water vapor that we can not see floating in the air. The temperature of these water vapor is relatively high. The water vapor condenses when it comes to tiles that are cooler than it