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Scientists in Britain and the United States have made a new kind of enzyme(酵素) that eats plastics(塑 料). With its help, plastics can be turned into smaller parts and go away quickly. Scientists believe that, in the future, it could solve the problem of plastic pollution.
The enzyme is able to break down PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can remain in the environment for many years and pollute large areas of land and water. So it has always been a headache to deal with the waste from PET and other plastics.
The researchers made the discovery(发 现) while examining the structure of a natural enzyme in Japan. They found that the natural enzyme was helping to break down PET plastics. So, they decided to make small changes to the enzyme by adding some amino acids(氨 基 酸). It made the natural enzyme’s plastic-eating abilities work faster and better.
John McGeehan, one of the lead researchers, said, “We’ve made an improved enzyme. It’s better than the natural one. And we are trying to make more improvements to it.” He went on, “The enzyme is not harmful to humans or animals, and it is friendly to the environment. So we are considering putting it into wider use.”
The team is now trying to make the enzyme break down PET in large quantities(大量
). “We’ll see that the plastic pollution may be stopped with this technology. However, there is still a long way to go,” John McGeehan added.1.Which is not true about the advantage of enzyme?
A.It’s able to make plastics become smaller parts.
B.It can solve the problem of the plastic pollution right now.
C.It’s used to make the plastics disappear in a rapid way.
2.The underlined phrase “break down” in the passage probably means “________” in Chinese.
A.实验 B.生产 C.分解
3.Which isn't the change they made to the natural enzyme?
A.Some amino acids were put in it.
B.The speed of plastic-eating has been improved.
C.The quality of plastic -eating remained the same.
4.Which of the following is TRUE according to the passage?
A.The scientists are still trying to improve the enzyme.
B.The enzyme will pollute large areas of land and water.
C.The natural enzyme woks better than the improved one.
5.We can’t infer from the study that________.
A.The team is able to increase the speed of the plastic -eating abilities
B.Efforts are made to increase the number of PET that the enzyme breaks down
C.Few efforts are required to the improvement of this new enzyme
九年级英语阅读单选困难题查看答案及解析
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Scientists in Britain and the United States have made a new kind of enzyme(酵素) that eats plastics(塑 料). With its help, plastics can be turned into smaller parts and go away quickly. Scientists believe that, in the future, it could solve the problem of plastic pollution.
The enzyme is able to break down PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can remain in the environment for many years and pollute large areas of land and water. So it has always been a headache to deal with the waste from PET and other plastics.
The researchers made the discovery(发 现) while examining the structure of a natural enzyme in Japan. They found that the natural enzyme was helping to break down PET plastics. So, they decided to make small changes to the enzyme by adding some amino acids(氨 基 酸). It made the natural enzyme’s plastic-eating abilities work faster and better.
John McGeehan, one of the lead researchers, said, “We’ve made an improved enzyme. It’s better than the naturl one. And we are trying to make more improvements to it.” He went on, “The enzyme is not harmful to humans or animals,and it is friendly to the environment. So we are considering putting it into wider use.”
The team is now trying to make the enzyme break down PET in large quantities(大量的). “We’ll see that the plastic pollution may be stopped with this technology. However,there is still a long way to go,”John McGeehan added.
1.According to the scientists, the enzyme may solve the poblem of pollution.
A. air B. water C. light D. plastic
2.The underlined phrase “break down” in the passage probably means “ ” in Chinese.
A. 实验 B. 生产 C. 发明 D. 分解
3.Researchers discovered that a natural enzyme helped eat plastics .
A. in B. in the US C. in Japan D. in China
4.Which of the following is TRUE according to the passage?
A. The scientists are sill trying to improve the enzyme.
B. The enzyme will pollute large areas of land and water.
C. The natural enzyme woks better than the improved one.
D. The natural enzyme is harmful to humans and animals.
九年级英语阅读单选中等难度题查看答案及解析
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Scientists in Britain and the United States have made a new kind of enzyme(酵素) that eats plastics(塑 料). With its help, plastics can be turned into smaller parts and go away quickly. Scientists believe that, in the future, it could solve the problem of plastic pollution.
The enzyme is able to break down PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can remain in the environment for many years and pollute large areas of land and water. So it has always been a headache to deal with the waste from PET and other plastics.
The researchers made the discovery(发 现) while examining the structure of a natural enzyme in Japan. They found that the natural enzyme was helping to break down PET plastics. So, they decided to make small changes to the enzyme by adding some amino acids(氨 基 酸). It made the natural enzyme’s plastic-eating abilities work faster and better.
John McGeehan, one of the lead researchers, said, “We’ve made an improved enzyme. It’s better than the naturl one. And we are trying to make more improvements to it.” He went on, “The enzyme is not harmful to humans or animals,and it is friendly to the environment. So we are considering putting it into wider use.”
The team is now trying to make the enzyme break down PET in large quantities(大量的). “We’ll see that the plastic pollution may be stopped with this technology. However,there is still a long way to go,”John McGeehan added.
1.According to the scientists, the enzyme may solve the poblem of pollution.
A. air B. water C. light D. plastic
2.The underlined phrase “break down” in the passage probably means “ ” in Chinese.
A. 实验 B. 生产 C. 发明 D. 分解
3.Researchers discovered that a natural enzyme helped eat plastics .
A. in B. in the US C. in Japan D. in China
4.Which of the following is TRUE according to the passage?
A. The scientists are sill trying to improve the enzyme.
B. The enzyme will pollute large areas of land and water.
C. The natural enzyme woks better than the improved one.
D. The natural enzyme is harmful to humans and animals.
九年级英语阅读单选中等难度题查看答案及解析
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The United States and Great Britain took the war on Iraq (伊拉克) in late March, 2003. over twenty days American soldiers were in Baghdad (巴格达市), the of Iraq. They ended the government (政府) of Saddam. Iraqis died in the war. Saddam was at first. No one knew he’s dead or alive.
In some parts of the city there was no light because of the war. Some oil wells (油井) were set on fire. Now the Iraqis need food, water and . Many soldiers and people who were hurt in the war need medical care. People also need to find their family members.
After the war, some Iraqis broke into Saddam’s palace, government buildings, and stores. They many things from Iraqi Museums. Many Iraqis are angry that the U.S. soldiers didn’t stop the robbers (抢劫者). So far there is no government of Iraqis.
The reason for American soldiers taking the war is that they are weapons of mess destruction (大规模杀伤性武器). But by June 6th, 2003 they hadn’t found any at all.
1.A.For B.After C.By D.During
2.A.city B.town C.capital D.village
3.A.Thousand B.Thousands C.Thousand of D.Thousands of
4.A.tired B.run C.gone D.forgotten
5.A.whether B.when C.how D.that
6.A.spaceships B.flowers C.people D.medicine
7.A.an idea B.a way C.a plane D.a bridge
8.A.bought B.borrowed C.stole D.brought
9.A.still B.ever C.yet D.already
10.A.looking at B.looking forC.giving up D.putting down
九年级英语完形填空简单题查看答案及解析
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完形填空。
The United States and Great Britain took the war on Iraq (伊拉克) in late March, 2003. over twenty days American soldiers were in Baghdad (巴格达市), the of Iraq. They ended the government (政府) of Saddam. Iraqis died in the war. Saddam was at first. No one knew he’s dead or alive.
In some parts of the city there was no light because of the war. Some oil wells (油井) were set on fire. Now the Iraqis need food, water and . Many soldiers and people who were hurt in the war need medical care. People also need to find their family members.
After the war, some Iraqis broke into Saddam’s palace, government buildings, and stores. They many things from Iraqi Museums. Many Iraqis are angry that the U.S. soldiers didn’t stop the robbers (抢劫者). So far there is no government of Iraqis.
The reason for American soldiers taking the war is that they are weapons of mess destruction (大规模杀伤性武器). But by June 6th, 2003 they hadn’t found any at all.
1.A.For B.After C.By D.During
2.A.city B.town C.capital D.village
3.A.Thousand B.Thousands C.Thousand of D.Thousands of
4.A.tired B.run C.gone D.forgotten
5.A.whether B.when C.how D.that
6.A.spaceships B.flowers C.people D.medicine
7.A.an idea B.a way C.a plane D.a bridge
8.A.bought B.borrowed C.stole D.brought
9.A.still B.ever C.yet D.already
10.A.looking at B.looking for C.giving up D.putting down
九年级英语完形填空中等难度题查看答案及解析
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完形填空。（共20分，每小题2分）
The United States and Great Britain took the war on Iraq (伊拉克) in late March, 2003. over twenty days American soldiers were in Baghdad (巴格达市), the of Iraq. They ended the government (政府) of Saddam. Iraqis died in the war. Saddam was at first. No one knew he’s dead or alive.
In some parts of the city there was no light because of the war. Some oil wells (油井) were set on fire. Now the Iraqis need food, water and . Many soldiers and people who were hurt in the war need medical care. People also need to find their family members.
After the war, some Iraqis broke into Saddam’s palace, government buildings, and stores. They many things from Iraqi Museums. Many Iraqis are angry that the U.S. soldiers didn’t stop the robbers (抢劫者). So far there is no government of Iraqis.
The reason for American soldiers taking the war is that they are weapons of mess destruction (大规模杀伤性武器). But by June 6th, 2003 they hadn’t found any at all.
1.A.For B.After C.By D.During
2.A.city B.town C.capital D.village
3.A.Thousand B.Thousands C.Thousand of D.Thousands of
4.A.tired B.run C.gone D.forgotten
5.A.whether B.when C.how D.that
6.A.spaceships B.flowers C.people D.medicine
7.A.an idea B.a way C.a plane D.a bridge
8.A.bought B.borrowed C.stole D.brought
9.A.still B.ever C.yet D.already
10.A.looking at B.looking for C.giving up D.putting down
九年级英语完形填空中等难度题查看答案及解析
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A recent poll by The New York Times shows that fewer and fewer people in the United States believe in the “American dream.” The poll asked the question: Do you believe you can start out poor in this country, work hard and become rich? Only 64 percent of Americans said “yes.”
Trust in the American dream may be disappearing. ____ halfway around the world, a new dream has been gaining strength – the Chinese dream.
President Xi said, “I believe that realizing the great revival(复兴) of the Chinese nation is the greatest dream of the Chinese nation in modern times.” The expression “Chinese dream” has since become President Xi Jinping' s political slogan. But, what is the Chinese dream? And how has President Xi started to make that dream a reality?
Xi' s Chinese dream has three key parts: strengthen China, improve prosperity（繁荣，昌盛）, and increase China' s military（军事的） power. In recent months, China has taken clear steps toward becoming stronger both domestically and globally.
For many Chinese citizens, it is not always easy to believe in the Chinese dream. Mr. Ernst says one major reason for this is the country' s severe pollution problem. “What is the most important thing you experience? Pollution. When you' re a young couple and you have kids, it' s not so easy to dream. Because you have to deal with very concrete（具体的） health concerns（顾虑）.”
The Chinese dream is not just for a richer and more powerful China, but a cleaner China. President Xi and the Chinese government know this. President Xi said, “Every day we will see a blue sky, green mountains and clear rivers, not just in Beijing, but all across China so that our children will live in an enjoyable environment.”
1.You can fill the word______ in the blank place?
A. Or B. And C. But D. So
2.What does the underlined word “slogan” mean in Chinese?
A. 短语 B. 口号 C. 呐喊 D. 能力
3.Which of the following is not true according to the passage?
A. Fewer and Fewer people believe in the American dream.
B. Chinese dream has three key parts.
C. In recent months, China has taken clear steps toward becoming stronger all over the world.
D. The Chinese dream is just for a richer and more powerful China.
4.What can we mainly learn from the fifth passage?
A. Pollution is a big problem in China.
B. Health is important for children.
C. It is not easy to realize the Chinese dream.
D. We will see a blue sky and clean rivers in the future.
5.What' s the best title of the passage?
A. The American dream B. The Chinese dream
C. Pollution in China D. Health in China
九年级英语阅读理解困难题查看答案及解析
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In Canada and the United States, there is a new group of children called “satellites kids”, who live in one place but whose parents live in another place.
Asians are immigrating (移居) to Canada and the United States in larger numbers than ever before. Most Asians immigrate because they believe that they can give their children a better education in the west. In Asia, especially in China, Japan and Korea, it is difficult to go to university. Students must first pass the strict national examination. However, in Canada and the United States, it is easy to go to university, and anyone who wants to go can go. As a result. Asian parents decide to leave their countries so that their children can go to university.
The problem is that when Asians arrive, they discover that finding a job and making money are more difficult in the West. So these children become “satellite kids”, and most of their parents do not know how sad it is to be a “satellite kids”.
Only until now are Canadians and Americans discovering the “satellite kids” problem. Because these children do not speak English and because their parents are not there to take care of them, they are often absent from school. To be a “satellite kids” means to grow up in such a country, you know you are different and you can’t make friends because you do not speak English well. Also, it means to grow up lonely, because your parents are not here.
1.According to the passage, parents in _______ don’t send their kids abroad.
A. China B. Japan C. Korea D. America
2.“Satellite kids” refer to the Asian kids ______.
A. without parents B. living abroad alone
C. with university education D. not speaking English
3.Some Asian immigrant children become “satellite kids” because their parents______.
A. want to leave their own country B. want them to go to university
C. return to their countries to work D. want them to be depend on themselves
4.The following problems of “satellites kids” are right except ___ ___.
A. They grow up lonely. B. The don’t often go to school.
C. They can make friends easily. D. Their parents can not look after them.
5.What is the main idea of the passage?
A. Parents feel lonely abroad.
B. Parents want a better education for their kids.
C. Canadians and Americans’ kids can’t find jobs easily.
D. Kids in foreign counties alone are very in need of care from families.
九年级英语阅读理解困难题查看答案及解析
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In Canada and the United States, there is a new group of children called "satellite kids", who live in one place but whose parents live in another place. 1.
Asians are immigrating (移民) to Canada and the United States in larger numbers than ever before. Most Asians immigrate because they believe that they can give their children a better education in the West. In Asia, especially in China, Japan and Korea, it is difficult to go to university. 2. However, in Canada and the United States, it is easy to go to university. As a result, Asian parents decide to leave their countries so that their children can go to university.
The problem is that when Asians arrive, they discover finding a job and making money are more difficult in the West than in the East. 3. Because of these two reasons, most Asian parents decide to go back to work while their children study in the West. 4. Their parents don't realize how sad it is to be a "satellite kid".
Studies have shown being a "satellite kid" means growing up in a country where you know you are different and where you can't make friends because you do not speak English well. What's more, it means growing up lonely, because your parents are elsewhere. What will these "satellite kids" probably say to their parents? 5.
A.Students must first pass the strict national examination.
B.Therefore, these children become "satellite kids".
C.It's better to have parents around than to have a university education.
D.Here is some information about them.
E.Also, they feel lonely and miss their homes.
九年级英语补全短文5选5中等难度题查看答案及解析
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In Canada and the United States, there is a new group of children called “satellite kids”, who live in one place but whose parents live in another place.
Asians are immigrating to Canada and the United States in larger numbers than ever believe that they can give their children a better education in the west. In Asia, especially in China, Japan, and Korea, it is difficult to go to university. Students must first pass the strict national examination. However, in Canada and the United States, it is easy to go to university, and anyone who wants to go can go. As a result, Asian parents decide to leave their countries so that their children can go to university.
The problem is that when Asians arrive, they discover that finding a job and making money are more difficult in the West than in the East. Also, they find that they are very lonely, and that they miss their homes. Because of these two reasons, most Asian parents decide to go back to work while their children study in the West. Therefore, these two reasons, most Asian parents decide to go back to work while their children study in the west. Therefore, these children become satellite kids”, and most of their parents do not know how sad it is to be a “satellite kid”.
Only until now are Canadians and Americans discovering the “satellite kids” problem. Because these children do mot speak English and because their parents are not there to take care of them, they are often absent from school. To be a “satellite kid” means growing up in a country where you know you are different and where you cannot make friends because you do not speak English well. Also, it means growing up lonely, because your parents are elsewhere. What these “satellite kids ”will probably say to their parents is that it’s better to have parents around than to have a university education.
根据材料内容选择最佳答案，并将其标号填入题前括号内。
1.Some Asian parents send their kids abroad because______．
A．they hope their children may easily find a job there
B．the kids may not be accepted by universities in their own countries
C．all foreign universities are better than the ones in their own countries
D．the kids want to improve their English and make foreign friends
2.”Satellite kids ”refer to Asian kids ______．
A．without parents B．want them to go to university
C．with university education D．speaking no English
3.Some Asian immigrant children become “satellite kids” because their parents ______．
A．want to leave their own country B．want them to go to university
C．return to their country to work D．want them to be independent
4.What is the main idea of the passage?
A．Parents want better education for their kids.
B．Parents feel lonely and miss their families.
C．Canadians and Americans begin to notice the “satellite kids ” problem.
D．Kids in foreign countries alone are badly in need of care from family.
5.Choose the best title for the passage _____.
A．How to Immigrate Abroad.
B．A New Group-satellite Kids.
C．It’s Better to Get a University Education
D．Making Money Is Easy in the East.
九年级英语阅读理解中等难度题查看答案及解析
). “We’ll see that the plastic pollution may be stopped with this technology. However, there is still a long way to go,” John McGeehan added.