In 1826, a Frenchman named Niepce needed pictures for his business .But he was not a good artist .So he invented a very simple camera .He put it in a window of his house and took a picture of his garden .That was the first photo.

 The next important date in the history of photography was in 1837.That year, Daguere, another Frenchman, took a picture of his reading room .He used a new kind of camera in a different way. In his picture you could see everything very clearly, even the smallest thing. This kind of photo was called a Daguerreotype.

 Soon, other people began to use Daguerre’s way .Travelers brought back wonderful photos from all around the world .people took picture of famous buildings, cities and mountains.

 In about 1840, photography was developed .Then photographers could take picture of people and moving things .That was not simple .The photographers had to carry a lot of film and other machines. But this did not stop them, for example, some in the United States worked so hard.

 Mathew Brady was a famous American photographer. He took many picture of great people .The picture were unusual because they were very lifelike.

 Photographers also became one kind of art by the end of the 19th century .Some photos were nor just copies of the real world .They showed and feelings, like other kinds of art.

(  ) 1.The first photo taken by Niepce was a pictures of ____________

       A. his business　　　B. his house　　　      C. his garden　　　   D. his window

(  ) 2.The Daguerro type was____________.

       A. a Frenchman　                                          B. a kind of picture　 

C. a kind of camera　                                 D. a photographer

(  ) 3.If a photographer wanted to take pictures of moving things in the year of 1840s, he    had to__________.

A. watch lots of films　　　　      B. buy an expensive camera

C. stop in most cities　　　　　D. take many films and something else with him.

(  ) 4. Mathew Brady_________.

A. was very lifelike　　　　　　　      B. was famous for his unusual pictures

C. was quite strong　　　　　　　      D. took many pictures of moving people

(  ) 5.This passage tells us_____________.

A. how photography was developed　

B. how to show your ideas and feelings in pictures

C. how to take pictures in the world　　

D. how to use different cameras

In 1826, a Frenchman named Niepce needed pictures for his business .But he was not a good artist .So he invented a very simple camera .He put it in a window of his house and took a picture of his garden .That was the first photo.

The next important date in the history of photography was in 1837.That year, Daguere, another Frenchman, took a picture of his reading room .He used a new kind of camera in a different way. In his picture you could see everything very clearly, even the smallest thing. This kind of photo was called a Daguerreotype.

Soon, other people began to use Daguerre’s way .Travelers brought back wonderful photos from all around the world .people took picture of famous buildings, cities and mountains.

In about 1840, photography was developed .Then photographers could take picture of people and moving things .That was not simple .The photographers had to carry a lot of film and other machines. But this did not stop them, for example, some in the United States worked so hard.

Mathew Brady was a famous American photographer. He took many picture of great people .The picture were unusual because they were very lifelike.

Photographers also became one kind of art by the end of the 19th century .Some photos were nor just copies of the real world .They showed and feelings, like other kinds of art.

( ) 1.The first photo taken by Niepce was a pictures of ____________

A. his business　　　B. his house　　　　　 C. his garden　　　　 D. his window

( ) 2.The Daguerro type was____________.

A. a Frenchman　 B. a kind of picture　

C. a kind of camera　　　　　　　　　　　　　　　 　　D. a photographer

( ) 3.If a photographer wanted to take pictures of moving things in the year of 1840s, he　 had to__________.

A. watch lots of films　　　　 　　 B. buy an expensive camera

C. stop in most cities　　　　　D. take many films and something else with him.

( ) 4. Mathew Brady_________.

A. was very lifelike　　　　　　　　　 B. was famous for his unusual pictures

C. was quite strong　　　　　　　　　 D. took many pictures of moving people

( ) 5.This passage tells us_____________.

A. how photography was developed　

B. how to show your ideas and feelings in pictures

C. how to take pictures in the world　　

D. how to use different cameras

Different weather makes people feel different. It influences (影响) health, intelligence (智力) and feelings.

In August, it is very hot and wet in the southern part of the United States. People there have heart trouble and other kinds of health problems during this month. In the Northeast and the Middle West, it is very hot at some times and very cold at other times. People in these states have more heart trouble after the weather changes in February or March.

The weather can also influence intelligence. For example, in a 1983 report by scientists, IQ (智商) of a group students were very high when a very strong wind came, but after the strong wind, their IQ was 10% below. The wind can help people have more intelligence. Very hot weather, on the other hand (另一方面), can make it lower. Students in many schools of the United States often get worse on exams in the hot months of the year (July and August).

Weather also has a strong influence on people’s feelings. Winter may be a bad time for thin people. They usually feel cold during these months. They might feel unhappy during cold weather. But fat people may have a hard time in hot summer. At about 18C, people become stronger.

Low air pressure (气压) may make people forgetful. People leave more bags on buses and in shops on low-pressure days. There is a “good weather” for work and health. People feel best at a temperature of about 18 centigrade (摄氏度).

Are you feeling sad, tired, forgetful, or unhappy today? It may be the weather’s problem.

1.People may have more intelligence when _____ comes.

　 A. a rain   B. very hot weather

C. a strong wind  D. low air pressure

2.Low air pressure may make people _______.

　 A. forgetful   B. sad  C. angry  D. tired

3.In “good weather” of 18 centigrade, _______.

A. people are very forgetful

B. people can’t do their work well

C. thin people feel cold

D. people are in better health

4.The writer wants to tell us that _______.

A. hot and cold weather influences all people in the same way

B. weather influences people’s lives

C. IQ never changes during weather changes

D. There is a good kind of weather for people’s work and health

 

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

 

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