题目

在水循环中，高空中的水蒸气突然遇到强冷空气，温度急剧下降形成小冰晶，这种物态变化属于（ ） A . 凝固 B . 升华 C . 液化 D . 凝华 答案：D阅读下面短文,根据短文内容及首字母提示补全文中所缺的单词。It's necessary to discover what you're good at or not and what you like or dislike.Many students would be unhappy if they f1.in a very difficult physics course,but in fact they have known a lot about t2..They realize that they should not become engineers or p3.scientists in the future.So failing can help a student to live a happier life if he or she draws something out of it.They may then decide on their aim and c4.the kind of work that they would be fit for and they would like to do.You can't be sure whether you like something u5.you have tried it.If you make a d6.that you would like to play the violin,you need to take more music classes b7.you know if you are really interested in it.It is not e8.to hope to be a violinist.You also have to stand the hard practice before you become one.If you would enjoy being a great violinist,but hate the hard and b9.work,just give it up.It's a good plan to try as many ideas as possible when you are still young.And then you will be able to find o10.what your true interests are. 1. failed 2. themselves 3. physical 4. choose 5. until not...until 6. decision 7. before 8. enough 9. boring 10. out 【解析】 试题有必要去发现你所擅长或不和你的喜欢或不喜欢。学会放弃自己不喜欢的，去学习 喜欢的和适合...