问题
填空题
同质多晶现象是指 (4) 。
答案
参考答案：化学组成相同的物质在不同的热力学条件下，形成结构不同的晶体
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同质多晶现象是指 (4) 。
参考答案：化学组成相同的物质在不同的热力学条件下，形成结构不同的晶体
| Read and choose the correct answer. 阅读短文，选择正确的答案。 |
| Jack: Where shall we eat dinner this evening? How about the new Italian restaurant? Jim: Sorry, I can't eat anything. I feel terrible. I've got a headache. Jack: You must be sick. You should see a doctor. Maybe you have got a flu(流行性感冒 ). Well, go to bed early and get some rest. Jim: I should study. We're going to have an English exam tomorrow. Jack: But you may have the flu. You can't take an exam with the flu. And you can't study with a terrible headache. Jim: That's true, but I must study hard this evening. Because I want to get a high mark in the exam. And I hope I will be fine tomorrow. |
| 1. Why doesn't Jim go to the restaurant? |
[ ] |
| A. Because he can't eat anything. He's got a stomach. B. Because he can't eat anything. He's got a headache. C. Because he doesn't want to go. D. Because he can't go. His mother is ill. |
| 2. What's wrong with Jim? |
[ ] |
| A. Maybe he has got a flu. B. Maybe he has a high fever (发烧). C. He must have a flu. . D. He must have a high fever. |
| 3. Why must Jim study this evening? |
[ ] |
| A. Because he will have a Chinese exam tomorrow. B. Because he will have a math exam tomorrow. C. Because he will have an English exam tomorrow. D. Because he will have a computer exam tomorrow. |