題目列表(包括答案和解析)
| 聽問題或者句子，選擇恰當的交際用語。 | ||
| ( )1. A. Thank you. ( )2. A. It is too big. ( )3. A. It makes me kind of angry. ( )4. A. Yes, I did. ( )5. A. I like to listen to the music. |
B. Yes, I did. B. They are 10 feet long. B. He hates pollution. B. Ann is my best friend. B. I have been to many restaurants |
C. No yet. C. I like them very nuch. C. The pollution is very serious. C. That's great fun. C. I think the best restaurant is the Red Star Restaurant. |
| A. Do you like to go to the movies? B. It’s wonderful, isn’t it? C. It doesn’t matter. D. Which movie do you like best? E. Because it makes me feel very excited. F. Thank you. G. What kind of movies do you like? |
從方框內選擇適當的選項完成對話。
|
A. Do you like to go to the movies? B. It’s wonderful, isn’t it? C. It doesn’t matter. D. Which movie do you like best? E. Because it makes me feel very excited. F. Thank you. G. What kind of movies do you like? |
A: Welcome to 9 o’clock Teen Talk. We are talking to Lin Tao, a fourteen-year-old boy. Welcome to the show, Lin Tao.
B: 1.
A: Today, we’re going to talk about the movies. 2.
B: Yes, I do.
A:3.
B: I like Avatar (《阿凡達》) best.
A: 4.
B: Yes, it is the best movie I have ever seen.
A: Why do you think so?
B: 5.
A: By the way, do you like the movie My Father’s Birthday?
B: Yes, very much.
A: Thanks for joining us.
B: That’s OK.
1
Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑戰) a world famous scientist!
Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸堿指示劑). They want it to take the place of litmus (石蕊) paper.
"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."
British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.
Will there be a better indicator than litmus paper? The three kids decided to try and find out!
How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (莖) to get the pigments (色素) from them.
The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best color change. They decided it was the litmus paper!
"It's our first scientific journey, Huang said, "But it makes me want to try harder."
1.Whom did the three kids want to challenge?
A. Their chemistry teacher.
B. Their headmaster.
C. Robert Boyle
D. Thomas Edison
2.From the text, a red cabbage is a kind of ____.
A. plant B. animal C. paper D. liquid
3.What is widely used as the acid-base indicator now?
A. red cabbage B. litmus paper
C. any plant D. any flower
4.The story mainly tells us ____.
A. how to make litmus paper
B. about the three kids' spirit
C. scientists were wrong
D. the kids are heroes
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