问题
改错题
| 下列每句的画线部分中有一处错误，找出并改正 。 | |
| ( )1. For many teenagers, Du Fei has a few habits that are not so good for him. A B C ( )2. I would rather go out than to stay at home. A B C ( )3. Exercising helps teenagers to stay health. A B C ( )4. He finded it important to learn English well. A B C ( )5. His teachers want him change his attitude. A B C | _________ _________ _________ _________ _________ |
答案
1. A→Like 2. C→stay 3. C→healthy 4. A→found 5. B→to change
2NH3(l) △H =________，该热化学反应方程式的意义是_______________。