问题
填空题
如果a2+b2+2c2+2ac﹣2bc=0,那么2a+b﹣1的值为( )。
答案
如果a2+b2+2c2+2ac﹣2bc=0,那么2a+b﹣1的值为( )。
口语运用, 根据所给情景选择最佳答案。 |
1. When your friend wants you to help him, he may say " ". |
[ ] |
A. Can I help you? B. Thank you for your help. C. Could you help me? D. You're welcome. |
2. If you meet a foreigner in the street, you can talk to him like " ". |
[ ] |
A. Hi! What's your name? B. Could I ask you a question? C. It's fine today, isn't it? D. Did you have the meal? |
3. Li Ming asks you "What do you think of the movie?", how can you answer? |
[ ] |
A. I don't know. B. Don't ask me. C. I think so. D. I enjoy it a lot. |
4. When someone asks you the way to the train station, you should say " ". |
[ ] |
A. Thank you. B. I'm afraid not. C. Sorry, please ask that policeman. D.You're unlucky, I don't know. |
5. If someone asks "What rules do you have at home?", you may answer " ". |
[ ] |
A. I often watch TV. B. I'm not allowed to go out on school nights. C. I don't like to stay at home. D. It's a good question. |