问题
填空题
把烧红的铁棒放在冷水中，会听到“吱吱”的响声并且看到水面冒出“白气”，在此过程中，水先后发生的物态变化是______和______．
答案
将烧红的铁棒插入水中，水的温度会升高，汽化出大量的水蒸气，水蒸气上升遇冷液化形成液态的小水珠，附着在空气尘埃中，就是“白烟”．
故答案为：汽化；液化．
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把烧红的铁棒放在冷水中，会听到“吱吱”的响声并且看到水面冒出“白气”，在此过程中，水先后发生的物态变化是______和______．
将烧红的铁棒插入水中，水的温度会升高，汽化出大量的水蒸气，水蒸气上升遇冷液化形成液态的小水珠，附着在空气尘埃中，就是“白烟”．
故答案为：汽化；液化．
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| Loving kindness is twice blessed I felt gloomy (沮丧的) the other day.It had been dark and rainy, and I just didn't feel so _1_. As I was sitting at my desk, I 2 it was the birthday of a dear longtime friend-a single, middleaged woman who has devoted the past 30 years to nursing and loves her 3 . Knowing that she doesn't have a family in town, I 4 to give her a call. Sure enough, she was 5 to work late into the evening, and wouldn't have 6 of a birthday this year. As always, 7 , she sounded cheerful and was happy that I 8 . After I hung up, I couldn't 9 the feeling that she would really appreciate a little attention on her special day. 10 feeling a little gloomy myself, I tried to put it out of my mind, but as the day passed I couldn't shake the thought. I 11 gave in, and that evening set off for the hospital with a card, a cheese cake and some balloons. My friend's grateful smile and joyful surprise 12 me I'd done the right thing and were a generous 13 for the little effort it had taken. When I got home, I realized that not only had I cheered up a 14 friend on her birthday, but my own gloomy feelings had also disappeared. Making her day had 15 my own! Isn't that the way it is 16 we take the time and make the 17 to do something for someone else? It's like the little saying:"Loving kindness is twice blessed; it blesses him who gives, and him who 18 ." Life constantly presents us with 19 to take an extra step or do a kind deed that will make a difference to 20 . And the wonderful thing is that as we do, it changes things for the better for us too. | ||||
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