《2025年快乐过暑假江苏凤凰科学技术出版社八年级提优版》

4. 若代数式$\frac {x+1}{x-1}$有意义,则实数x的取值范围是$ x \neq 1 $。

答案： $ x \neq 1 $

5. 分式$\frac {1}{3a^{2}b}和\frac {1}{2ab^{2}}$的最简公分母是$ 6 a ^ { 2 } b ^ { 2 } $。

答案： $ 6 a ^ { 2 } b ^ { 2 } $

6. 不改变分式的值,把分式$\frac {0.1x+0.2y}{0.3+y}$的分子、分母各项系数都化为整数,得$\frac { x + 2 y } { 3 + 10 y }$。

答案： $ \frac { x + 2 y } { 3 + 10 y } $

7. 已知$\frac {y+z}{x}= \frac {x+z}{y}= \frac {x+y}{z}$,其中$x+y+z≠0$,求$\frac {x+y-z}{x+y+z}$的值。$\frac {1}{3}$

答案： $ \frac { 1 } { 3 } $

1. The lady read some news on her phone while queuing for her turn at the box office.
2. He was so careless when he walked along the road that he bumped into an old lady.
3. Tom as well as his wife has been invited to a party.
4. I was a bit angry when I saw a young boy push in before me.
5. I rang for a taxi. And it arrived soon after.

答案： 1. queuing 2. bumped 3. as well as 4. push 5. soon

二 阅读短文,在文中空白处填入1个适当的单词,或用括号内所给单词的正确形式填空
Humour is part of human nature. Everyone has the ability to enjoy jokes and laughter, no matter who they are or where they come from. Humour is one of ____1____the most important (important) ways people make connections with each other. Humour also helps you look on the bright side of life and face ____2____problems (problem) positively(积极地).
One sunny afternoon, the famous British writer Bernard Shaw was enjoying ____3____himself (he) in a quiet field. Suddenly, a bike rider ran into him. Luckily, Mr Shaw was not hurt. “I’m so sorry!” said the rider. “Oh, no,” said Mr Shaw. “I should say sorry ____4____because I’m not giving luck to you. If you had killed me, you know, you would be famous all over the world. ”
Feng Jicai, the Chinese writer, was once visited by an ____5____American (America) friend and his young child in a hotel. ____6____While the two men were talking, the little boy was jumping up and down on his bed. The bed was shaking, and Feng was worried that it might break. He smiled to the boy, “Hey, boy! Are you trying ____7____to reach (reach) the sky? Will you return to the Earth?” His friend ____8____understood (understand) at once, and said to his son jokingly, “Let’s come back right now!”
Although different people may have a different sense of humour, good humour has something in common. First, you need to keep a cool head and ____9____an open mind. With humour, you can avoid some unnecessary conflicts(冲突), and sometimes it helps you laugh even at the worst of your problems. ____10____Second (two), you need to be kind and understanding. In an embarrassing(尴尬的) situation, using humour can let your friend save face.
1. ____ 2. ____ 3. ____ 4. ____ 5. ____
6. ____ 7. ____ 8. ____ 9. ____ 10. ____

答案： 1. the most important 2. problems 3. himself 4. because 5. American 6. While 7. to reach 8. understood 9. an 10. Second