摘要： The story mainly tells us . A. how to make litmus paper B. about the three kids' spirit C. scientist were wrong D. the kids are heroes 四 动词填空.用所给动词的适当形式填空 I No one knows how man 56 to make words. Maybe he began by 57 sounds. As time went by, he made more and more sounds and more and more words. This is what we call languages. Even some animals also have their languages. When some food 58 , a bee goes back to its home. It wants 59 the other bees where the food is .But it can’t speak, so it does a little dance in the air. In this way it 60 the other bees where the food is. II There are boys who think themselves men and who go to barber’s shops 61 . Once a boy came into a barber’s, and 62 (ask) the barber to shave him. The barber asked him to sit down, and soaped his face. Then he left the boy alone. He stood at the door 63 and talking with another barber. The young gentleman waited for some minutes and then shouted, “Well, what are you leaving me here all this time for? The barber replied, “ I 64 until your beard 65 . 五 句型转换 (10)
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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."
小题1: Whom did the three kids want to challenge?
小题2: From the text, a red cabbage is a kind of ____.
小题3:What is widely used as the acid-base indicator now?
小题4:The story mainly tells us ____.
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."
小题1: Whom did the three kids want to challenge?
| A．Their chemistry teacher. | B．Their headmaster. |
| C．Robert Boyle | D．Thomas Edison |
| A．plant | B．animal | C．paper | D．liquid |
| A．red cabbage | B．litmus paper |
| C．any plant | D．any flower |
| A．how to make litmus paper | B．about the three kids’ spirit |
| C．scientists were wrong | D．the kids are heroes |
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
- A.
- 2.
From the text, a red cabbage is a kind of ____.
- A.plant
- B.animal
- C.paper
- D.liquid
- A.
- 3.
What is widely used as the acid-base indicator now?
- A.red cabbage
- B.litmus paper
- C.any plant
- D.any flower
- A.
- 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
- A.
阅读理解
Three kids have been learning chemistry for only a few months. But they have already begun to
challenge 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."
challenge 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
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
B. animal
C. paper
D. liquid
3. What's the right order for the following sentences?
a. Three kids collect red cabbage everywhere.
b. The kids mixed pigments with acid and base.
c. The kid ground the red cabbage.
d. The kids get pigments from it.
a. Three kids collect red cabbage everywhere.
b. The kids mixed pigments with acid and base.
c. The kid ground the red cabbage.
d. The kids get pigments from it.
A. a-b-c-d
B. b-a-c-d
C. a-c-d-b
D. b-c-d-a
B. b-a-c-d
C. a-c-d-b
D. b-c-d-a
4. What is widely used as the acid-base indicator now?
A. red cabbage
B. litmus paper
C. any plant
D. any flower
B. litmus paper
C. any plant
D. any flower
5. The story mainly tells us ____.
A. how to make litmus paper
B. about the three kids' spirit
C. scientist were wrong
D. the kids are heroes
查看习题详情和答案>>
B. about the three kids' spirit
C. scientist were wrong
D. the kids are heroes
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."
【小题1】 Whom did the three kids want to challenge?
【小题2】 From the text, a red cabbage is a kind of ____.
【小题3】What is widely used as the acid-base indicator now?
【小题4】The story mainly tells us ____.
查看习题详情和答案>>
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."
【小题1】 Whom did the three kids want to challenge?
| A．Their chemistry teacher. | B．Their headmaster. |
| C．Robert Boyle | D．Thomas Edison |
| A．plant | B．animal | C．paper | D．liquid |
| A．red cabbage | B．litmus paper |
| C．any plant | D．any flower |
| A．how to make litmus paper | B．about the three kids' spirit |
| C．scientists were wrong | D．the kids are heroes |
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."
【小题1】Whom did the three kids want to challenge?
| A．Their chemistry teacher. |
| B．Their headmaster. |
| C．Robert Boyle |
| D．Thomas Edison |
| A．plant | B．animal | C．paper | D．liquid |
| A．red cabbage | B．litmus paper |
| C．any plant | D．any flower |
| A．how to make litmus paper |
| B．about the three kids' spirit |
| C．scientists were wrong |
| D．the kids are heroes |