问题
填空题
蒸发是在任何______下都能发生的气化现象，它只发生在液体的______．液体在蒸发的过程中要______热．汽化的两种方式是：______和______．
答案
蒸发可以在任何温度下进行，它是只在液体表面发生的汽化现象．蒸发过程是吸热过程．蒸发和沸腾都是汽化的一种方式．
故答案为：任何温度；表面；吸；蒸发；沸腾．
搜题请搜索小程序“爱下问搜题”
蒸发是在任何______下都能发生的气化现象，它只发生在液体的______．液体在蒸发的过程中要______热．汽化的两种方式是：______和______．
蒸发可以在任何温度下进行，它是只在液体表面发生的汽化现象．蒸发过程是吸热过程．蒸发和沸腾都是汽化的一种方式．
故答案为：任何温度；表面；吸；蒸发；沸腾．
| 完形填空。 From Monday to Friday most people are busy working or studying, but in the evenings and weekends they are free and 1 themselves. Some watch television or go to the movies and others take part in sports. This is decided by their own 2 . There are many different ways to spend our 3 time. Almost everyone has some kind of 4 it may be something from collecting stamps to 5 model planes. Some hobbies are very expensive but others don't cost anything at all. Some collections are worth a lot of money but others are 6 only to their owners. I know a man. He has a coin collection worth (值) thousands of dollars. A short time ago he bought a rare (珍贵的) fifty-cent piece. It 7 him ＄250! He was very happy about this collection and thought the price was all right. On the other hand, my youngest brother collects match boxes. He has almost 600 of them, but I wonder 8 they are worth any money. However, to my brother they are quite valuable. 9 makes him happier than to find a new match box for his collection. That's what a hobby means, I think. It is something we 10 to do in our free time just for the fun of it. The value in dollars is not important, but the pleasure it gives us is. | ||||
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