如果分式$\frac{x^2-1}{2x+2}$的值为0，则x的值是

1. When you come to Yancheng, you can enjoy the BRT(快速公交). It's ____(舒适) and fast. How fast our city is developing!
2. Many people don't want to live in Tokyobecause of the Nuclear(核)____ (污染).
3. This  his ____ (九) year in Sheyang. He loves living here. He loves everything here.
4. We are looking forward to his ____  (到达). He is a famous singer.
5. China's ____ (人口) is becoming aging (老龄化的). We must take action to prevent it.
6. —What's the w____  like today?  —The radio says it's sunny.
7. If you read more, you will get more k____ Do you believe it?
8. Boys like watching ball games very much, e____  the NBA. Those basketball players are really wonderful.
9. When you go for a picnic, remember “S____ is first. Keep away from the dangerous places. ”
10. Many ____  (mouse) destroyed the crops near the village. The farmers were   catching them everywhere.
11. He is ____ (true) sorry that he failed to pass the exam. But I don't believe him, and you?
12. Millie doesn't dance as ____  (beautiful) as her sister. She hasn't practice it for a long time.
13. I would like Liu Qian to teach ____ (we) how to play magic. We admire him very much. He is my hero.       
14. Juan Antonio Samaranch(萨马兰奇)'s ____  (die) was a great loss to the whole world. People loved him very much all over the world.

    It was Sunday morning. Peter was at home. He had no 1. After breakfast，Peter said to his mother， “Mom，could you go to the beach(海滩） with 2？”“OK, dear. I want to go there, too.” his mother said， “The food and drinks there are very3. Let's take some food and drinks, so we don't need to 4 any there.” “Good idea!” said Peter. They 5 a bus there. There weren't 6 people on the bus, and they each had a seat.

    On the beach, Peter and his mother had a 7 time. They played ball games and had a swim in the8.Peter made 9 new friends there. One is Victor and the other is Sally. After getting home, Peter 10an e-mail to his cousin Lucy, and he told her what he and his mother did on the beach.

探究乙酸、碳酸和苯酚的酸性强弱关系该校学生设计了下图的实验装置（夹持仪器已略去）．