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
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
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
— 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
Dear Jack,
How are you? I have been in the USA for six months. I like the life here. I have a few friends. I don't have much homework. There are a lot of sports at my school, but I don't like sports at all. like the food very much. I eat a lot of different kinds of food every day. I like coke(可乐)very much. I don't drink water. I drink coke instead(代替). I'm enjoying my life here. The sad thing is that sometimes I get ill. I don't know why. My parents say I must go on a diet(节食)and do more sports. Must I?
Yours,
David
判断下列句子是否符合短文内容。符合的写“T”,不符合的写“F”。
1.David has been in America for six months.
2.David has to do much homework.
3.There are many sports at David's school.
4.David likes coke better than water.
5.David knows why he is often ill.
九年级英语阅读理解中等难度题查看答案及解析
Writing.
Time flies. You’ve already been in junior three for more than two months. You may have some problems in your school life. What is the biggest one? Please write a passage to talk about it. The passage should include :
1. what your biggest problem is.
2. what causes the problem. List at least two reasons.
3. who can probably help you solve the problem.
4. the possible solution to the problem.
九年级英语话题作文中等难度题查看答案及解析
任务型阅读
Although most of us have been learning English for more than three years or even more, we can't still make sure everyone of us has already known how to leam English well.
Some students still think that learning English is just to remember new words, phrases, grammar rules and some sentence structures. It seems if we do so, we can have a good knowledge of English. We must make sure that things are not always what they seem to be.
Now imagine how we learn our mother tongue well. We learn it well by communicating with the people around us all day long. So we think it’s not difficult for us to learn our mother tongue.
Why do we think it is hard to learn English well? We all know that learning English usually takes place in schools and there are few opportunities to communicate with other speakers of the language. As a result, some think that learning English is slow and much difficult. It’s because we spend less time learning and practicing it than doing our mother tongue.
The following may help us in some way.
We should gain confidence and we must be brave enough to speak English before others.
Don’t be afraid of losing our faces while talking with others in English.
We must make a long and careful study plan. Once we do it, we must take pains to continue learning English every day.
Think about what we have done and decide to study English harder than ever.
Finally we should take every opportunity to practice speaking English as often as possible.
请阅读文章后完成下面的句子:
1.How do some students think they should learn Engish?
By ______________________and some sentence structures.
2.Why is it not difficult for us to learn our mother language well?
Весаuѕе wе соmunіcate wіth оthеr рeoрlе_________________.
3.Where do we usually learn English? We usually learn English__________.
4.Ноw mаnу suggeѕtіоnѕ саn wе gеt tо hеlр uѕ lеаrn Еnglіѕh bеttеr іn thе раѕsagе?
Тhеrе аre __________ѕuggеѕtіоnѕ.
5.What is the topic of the passage?
It is about ______________________.
九年级英语信息归纳困难题查看答案及解析
—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
—Have you ever been to Shanghai?
—Yes. I _______ there a few months ago.
A. have been B. went C. have gone
九年级英语单项填空中等难度题查看答案及解析
--Have you ever been to Shanghai?
---Yes. I ________ there a few months ago.
A have been B. went C. have gone
九年级英语单项填空简单题查看答案及解析