1
Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) 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 (酸碱指示剂). 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 (茎) 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
九年级英语阅读理解困难题
1
Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) 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 (酸碱指示剂). 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 (茎) 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
九年级英语阅读理解困难题查看答案及解析
Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) 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 (酸碱指示剂). 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 (茎) 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 colour 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
九年级英语阅读理解中等难度题查看答案及解析
— Can you speak Chinese, Steve?
— Yes, only . I have been in China for only one month.
A. few B. a few C. little D. a little
九年级英语单项填空中等难度题查看答案及解析
— Can you speak Chinese, Steve?
— Yes, only . I have been in China for only one month.
A. few B. a few C. little D. a little
九年级英语单选题中等难度题查看答案及解析
—I’m sorry to keep you waiting.
—Never mind. I have _______ here for only a few minutes.
A.been B.arrived C.got D.reached
九年级英语单选题中等难度题查看答案及解析
—I'm sorry to have kept you waiting.
—Oh, not at all. I ________here only a few minutes.
A. have been B. had been C. was D. will be
九年级英语单项填空中等难度题查看答案及解析
Tom doesn’t know _________ Chinese because he has learned it for only _________ weeks.
A.much; a few B.little; a few C.much; a little D.little; a little
九年级英语单项填空简单题查看答案及解析
— Bad luck! It’s too late!
— Don’t worry. The movie for only a few minutes.
A. has begun B. has been on C. began D. begins
九年级英语单选题中等难度题查看答案及解析
Libraries give kids a quiet and safe place to read and learn. For over 100 years, libraries have played an important role in Americans’ education. But how are these book-filled buildings changing with the times? You may be surprised to find out.
Benjamin Franklin famously founded (创建) America’s first lending library in 1731. But the public library system got its biggest development in the American history in the late 1800’s. Businessman Andrew Carnegie donated millions of dollars to help build free public libraries across the country. Between 1886 and 1919, Carnegie’s donations helped build 1,679 new libraries.
Carnegie believed that libraries could offer the chances to Americans, young and old. He knew that the more libraries there were, the more people would have opportunities to read and use books, speeches and news.
If you can easily find a public library in your community(社区), you’ll get more chances. After all, the United States has 9,225 public libraries. Today, libraries keep growing. Seven tenths of the libraries have free Internet. It provides much more information and opportunities to ask for jobs online.
Libraries are also teaching kids about the fun of reading. The new program Read! Build! Play! adds reading into playtime. As kids listen to a book that is being read aloud, they use Legos (乐高积木) to build images(图像) from the story happily. Today’s libraries are always looking for creative programs to bring people into the library.
Benjamin Franklin once said, “The doors of wisdom(智慧) are never shut.” As long as the doors of public libraries are open, what he said is most certainly correct!
1.Benjamin Franklin founded the first lending library in _______.
A. 1731 B. 1800 C. 1886 D. 1919
2.How many public libraries have free Internet now?
A. 2767. B. 6458. C. 9225. D. 1679.
3.The right order of the following statements is ______ .
①The public library system in America developed fast.
②The first lending library was founded.
③ Libraries provide information and chances to ask for job online.
④ Libraries try to bring people into the library by using creative programs.
A. ②①③④ B. ②③④①
C. ③④①② D. ①②③④
4.The last paragraph mainly tells us_________.
A. libraries have played an important role in Americans’ education
B. public libraries in the US should never close the doors
C. the writer doesn’t agree with Benjamin Franklin
D. libraries help people to open the doors of wisdom
5.The best title for the passage is _______.
A. the libraries in the world
B. libraries and opportunities
C. libraries teach kids to read and learn
D. the development of the American libraries
九年级英语阅读理解中等难度题查看答案及解析
Libraries give kids a quiet and safe place to read and learn. For over 100 years, libraries have played an important role in Americans’ education. But how are these book-filled buildings changing with the times? You may be surprised to find out.
Benjamin Franklin famously founded America’s first lending library in 1731. But the public library system got its biggest development in the American history in the late 1800’s. Businessman Andrew Carnegie donated millions of dollars to help build free public libraries across the country. Between 1886 and 1919, Carnegie’s donations helped build 1,679 new libraries.
Carnegie believed that libraries could offer the chances to Americans, young and old. He knew that the more libraries there were, the more people would have opportunities to read and use books, speeches and news.
If you can easily find a public library in your community, you’ll get more chances. After all, the United States has 9,225 public libraries. Today, libraries keep growing. Seven tenths of the libraries have free Internet. It provides much more information and opportunities to ask for jobs online.
Libraries are also teaching kids about the fun of reading. The new program Read! Build! Play! adds reading into playtime. As kids listen to a book that is being read aloud, they use Legos (乐高积木) to build images(图像)from the story happily. Today’s libraries are always looking for creative programs to bring people into the library.
Benjamin Franklin once said, “The doors of wisdom are never shut.” As long as the doors of public libraries are open, what he said is most certainly correct!
1.How many public libraries have free Internet in the US now?
A. 2767. B. 6458. C. 9225. D. 1679.
2.What is the right order of the following statements?
①The public library system in America developed fast.
②The first lending library was founded.
③Libraries provide information and chances to ask for job online.
④Libraries try to bring people into the library by using creative programs.
A. ②①③④ B. ②③④① C. ③④①② D. ①②③④
3.What does the last paragraph mainly tells us?
A. Libraries have played an important role in Americans’ education.
B. Public libraries in the US should never close the doors.
C. The writer doesn’t agree with Benjamin Franklin.
D. Libraries help people to open the doors of wisdom.
4.What would be the best title for the passage?
A. The Libraries in the World
B. Libraries And Opportunities
C. Libraries Teach Kids to Read And Learn
D. The Development of the American Libraries
九年级英语阅读理解困难题查看答案及解析