Many people think of the brain as a mystery. They don’t know much about intelligence and how it works. When they do think about what intelligence is, many people believe that a person is born smart, average, or dumb—and stays that way in the whole life. But new research shows that the brain is more like a muscle（肌肉）—it changes and gets stronger when you use it. And scientists have been able to show just how the brain grows and gets stronger when you learn.
Everyone knows that when you lift weights, your muscles get bigger and you get stronger. A person who can’t lift 20 pounds when he/she starts exercising can get strong enough to lift 100 pounds after working out for a long time. That’s because the muscles become larger and stronger with exercise. And when you stop exercising, the muscles shrink（收缩）and you get weaker. That’s why people say “Use it or lose it!”
But most people don’t know that when they practice and learn new things, parts of their brain change and get larger a lot like muscles do when they exercise. Inside the cortex（皮层）of the brain are billions of tiny nerve（神经元）cells（细胞）,called neurons. The nerve cells have branches connecting them to other cells in a complicated（复杂）network. Communication between these brain cells is what allows us to think and solve problems. When you learn new things, these tiny connections in the brain actually multiply and get stronger. The more you challenge your mind to learn, the more your brain cells grow. Then, things that you once found very hard or even impossible to do —like speaking a foreign language or doing algebra（代数）—seem to become easy after learning them for a period of time. The result is a stronger, smarter brain.
Scientists started thinking that the human brain could develop and change when they studied animals’ brains. They found out that animals that lived in a challenging environment were more “perspicacious”—they were better at solving problems and learning new things.
1.According to the first paragraph, .
A.the function（作用）of our brain is like that of the muscle
B.until now it’s impossible to explain the brain’s mystery
C.many people believe one’s intelligence is naturally determined（决定）
D.one’s brain grows stronger as the age increases
2.What is Paragraph 3 mainly about?
A.The complicated structure of the brain.
B.How changes in the muscles affect the brain.
C.The importance of the brain.
D.How the brain becomes stronger by learning new things.
3.What does the underlined word “perspicacious” in the last paragraph probably mean?
A.Strong. B.Smart. C.Popular. D.Active.
4.The paragraph that follows the passage will most probably talk about .
A.the differences between animals’ brains and humans’ brains
B.the relation between human brains and muscles
C.scientists’ findings about animals’ brains
D.how to make your brain smarter through self-development
九年级英语阅读单选困难题
Many people think of the brain as a mystery. They don’t know much about intelligence and how it works. When they do think about what intelligence is, many people believe that a person is born smart, average, or dumb—and stays that way in the whole life. But new research shows that the brain is more like a muscle（肌肉）—it changes and gets stronger when you use it. And scientists have been able to show just how the brain grows and gets stronger when you learn.
Everyone knows that when you lift weights, your muscles get bigger and you get stronger. A person who can’t lift 20 pounds when he/she starts exercising can get strong enough to lift 100 pounds after working out for a long time. That’s because the muscles become larger and stronger with exercise. And when you stop exercising, the muscles shrink（收缩）and you get weaker. That’s why people say “Use it or lose it!”
But most people don’t know that when they practice and learn new things, parts of their brain change and get larger a lot like muscles do when they exercise. Inside the cortex（皮层）of the brain are billions of tiny nerve（神经元）cells（细胞）,called neurons. The nerve cells have branches connecting them to other cells in a complicated（复杂）network. Communication between these brain cells is what allows us to think and solve problems. When you learn new things, these tiny connections in the brain actually multiply and get stronger. The more you challenge your mind to learn, the more your brain cells grow. Then, things that you once found very hard or even impossible to do —like speaking a foreign language or doing algebra（代数）—seem to become easy after learning them for a period of time. The result is a stronger, smarter brain.
Scientists started thinking that the human brain could develop and change when they studied animals’ brains. They found out that animals that lived in a challenging environment were more “perspicacious”—they were better at solving problems and learning new things.
1.According to the first paragraph, .
A.the function（作用）of our brain is like that of the muscle
B.until now it’s impossible to explain the brain’s mystery
C.many people believe one’s intelligence is naturally determined（决定）
D.one’s brain grows stronger as the age increases
2.What is Paragraph 3 mainly about?
A.The complicated structure of the brain.
B.How changes in the muscles affect the brain.
C.The importance of the brain.
D.How the brain becomes stronger by learning new things.
3.What does the underlined word “perspicacious” in the last paragraph probably mean?
A.Strong. B.Smart. C.Popular. D.Active.
4.The paragraph that follows the passage will most probably talk about .
A.the differences between animals’ brains and humans’ brains
B.the relation between human brains and muscles
C.scientists’ findings about animals’ brains
D.how to make your brain smarter through self-development
九年级英语阅读单选困难题查看答案及解析
Some people don't know the value of their health they lose it.
A. after B. when C. until D. as
九年级英语单选题中等难度题查看答案及解析
_______ ,as one of the greatest mysteries in Britain. is how it was built , but we do know they must have been hard-working
A. Big Ben B. Stonehenge C. Qomolangma
九年级英语单选题中等难度题查看答案及解析
—Many students don’t know how to difficulties and become worried.
—I think they should ask the teacher for help.
A. play with B. deal with C. talk with D. come up with
九年级英语单选题中等难度题查看答案及解析
—Many students don’t know how to difficulties in their studies.
—I think they should ask the teacher for help.
A. play with B. deal with C. talk with D. go with
九年级英语单选题中等难度题查看答案及解析
（题文）—Many students don’t know how to difficulties and become worried.
—I think they should ask the teacher for help.
A. play with B. deal with C. talk with D. come up with
九年级英语单选题中等难度题查看答案及解析
Internet is educational . Many people think children should be allowed to surf the Internet as they wish . In this way ,they can look through different subjects on different kinds of websites according to their own interest . But in my opinion ,children should always be watched while surfing the internet .
Many websites have information and pictures that children should not see .There are many things that children don’t understand .All of these may have some bad influence on children ‘s development . Also , it is dangerous to let children use chat rooms by themselves .Many parents tell their children not to talk to strangers on the street , so they should be careful of whom their children talk to on the internet,too . What’s more , sitting in the front of a computer for a long time isn't good for children’s eyes , so parents should monitor(监视) the time that children spend on the internet .
In a word ,children should be kept away anything that could be bad for them . I strongly believe that it is necessary for parents to watch their children when they use internet .
1.Is the Internet educational all the time ?
2.What do the parents tell children to do when they meet strangers on the street ?
3.Why shouldn’t children sit in front of a computer for a long time ?
4.Who can help children stay away from the bad influence on the Internet ?
5.What does the writer want to tell us in the passage ?
九年级英语阅读理解中等难度题查看答案及解析
Internet is educational. Many people think children should be allowed to surf the Internet as they wish. In this way ， they can look through different subjects on different kinds of websites according to their own interests. But in my opinion， children should always be watched while surfing the Internet .
Many websites have information and pictures that children should not see. There are many things that children don’t understand. All of these may have some bad influence on children’s development. Also， it is dangerous to let children chat in rooms by themselves. Many parents tell their children not to talk to strangers on the street， so they should be careful of whom their children talk to on the Internet too. What’s more ， sitting in the front of a computer for a long time isn't good for children’s eyes， so parents should monitor(监视) the time that children spend on the Internet.
In a word， children should be kept away from anything that could be bad for them. I strongly believe that it is necessary for parents to watch their children when they use the Internet.
1. When should the children always be watched in the writer’s opinion ?
___________________________________________________________________________
2.What do the parents tell children to do when they meet strangers on the street ?
___________________________________________________________________________
3. Why shouldn’t children sit in front of a computer for a long time ?
___________________________________________________________________________
4.Who can help children stay away from the bad influence on the Internet ?
___________________________________________________________________________
5.What does the writer want to tell us in the passage ?
___________________________________________________________________________
九年级英语阅读理解中等难度题查看答案及解析
Internet is educational. Many people think children should be allowed to surf the Internet as they wish. In this way, they can look through different subjects on different kinds of websites according to their own interest. But in my opinion, children should always be watched while surfing the internet.
Many websites have information and pictures that children should not see. There are many things that children don’t understand. All of these may have some bad influence on children’s development. Also, (1)让孩子们单独聊天是危险的。Many parents tell their children not to talk to strangers on the street, so they should be careful of whom their children talk to on the Internet, too. What’s more, sitting in front of a computer for a long time isn’t good for children’s eyes, so parents should monitor（监视）the time that children spend on the Internet.
(2) In a word, children should be kept away from anything that could be bad for them. I strongly believe that it is necessary for parents to watch their children when they use the Internet.
1. Is the Internet educational all the time?
____________________________________________________________________
2. What do the parents tell children to do when they meet strangers on the street?
____________________________________________________________________
3. Why shouldn’t children sit in front of a computer for a long time?
____________________________________________________________________
4. 将短文中划线句子（1）翻译成英语。
____________________________________________________________________
5. 将短文中划线句子（2）翻译成汉语。
____________________________________________________________________
九年级英语阅读理解中等难度题查看答案及解析
Internet is educational. Many people think children should be allowed to surf the Internet as they wish. In this way, they can look through different subjects on different kinds of websites according to their own interest. But in my opinion, children should always be watched while surfing the internet.
Many websites have information and pictures that children should not see .There are many things that children don’t understand .All of these may have some bad influence on children‘s development . Also , it is dangerous to let children use chat rooms by themselves .Many parents tell their children not to talk to strangers on the street , so they should be careful of whom their children talk to on the internet, too . What’s more , sitting in the front of a computer for a long time isn't good for children’s eyes , so parents should monitor(监视) the time that children spend on the internet .
In a word, children should be kept away anything that could be bad for them. I strongly believe that it is necessary for patents to watch their children when they use internet.
1.Is the Internet educational all the time? ___________________________________
2.What do the parents tell children to do when they meet strangers on the street?
______________________________________________________________________________
3.Why shouldn’t children sit in front of a computer for a long time?
______________________________________________________________________________
4.Who can help children stay away from the bad influence on the Internet?
______________________________________________________________________________
5.What does the writer want to tell us in the passage?
________________________________
九年级英语阅读理解中等难度题查看答案及解析