Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts(筏子) to keep afloat during floods. They also have documented how ant colonies choose their next queen — the female whose job is to produce eggs rather than seek food for others.
New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned. Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.
David Hu, who is a mechanical engineer with the Georgia Institute of Technology, also known as Georgia Tech, says, “If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they’re very, very good at maintaining this network.”
David Hu and other Georgia Tech researchers want to study ants and the secret of their engineering. They freeze ant rafts and then look at them with the help of computed technology, or CT, images. The pictures show that larger ants serve in central positions to which smaller ants hold. The larger ants form pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal.
Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.
1.The duty of the queen ants is to_____.
A. seek food B. keep organized
C. lay eggs D. keep guard
2.The author takes fire ants as an example to tell us _____.
A. how ants seek food perfectly B. How ants save themselves from floods
C. how ants communicate D. How ants connect their legs together
3.Which of the following is true according to the passage?
A. Ants know the way to form a harmonious society.
B. The Georgia Tech researchers first discovered Indian jumping ants.
C. All the worker ants in the colony are physically larger.
D. Small and shaped-changeable things might work just like ants do.
高三英语阅读理解简单题
Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts(筏子) to keep afloat during floods. They also have documented how ant colonies choose their next queen — the female whose job is to produce eggs rather than seek food for others.
New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned. Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.
David Hu, who is a mechanical engineer with the Georgia Institute of Technology, also known as Georgia Tech, says, “If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they’re very, very good at maintaining this network.”
David Hu and other Georgia Tech researchers want to study ants and the secret of their engineering. They freeze ant rafts and then look at them with the help of computed technology, or CT, images. The pictures show that larger ants serve in central positions to which smaller ants hold. The larger ants form pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal.
Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.
1.The duty of the queen ants is to_____.
A. seek food B. keep organized
C. lay eggs D. keep guard
2.The author takes fire ants as an example to tell us _____.
A. how ants seek food perfectly B. How ants save themselves from floods
C. how ants communicate D. How ants connect their legs together
3.Which of the following is true according to the passage?
A. Ants know the way to form a harmonious society.
B. The Georgia Tech researchers first discovered Indian jumping ants.
C. All the worker ants in the colony are physically larger.
D. Small and shaped-changeable things might work just like ants do.
高三英语阅读理解简单题查看答案及解析
Scientists say they have found high levels of small plastic particles(颗粒) in Arctic snow. A German-Swiss research team collected snow samples(样本）from the Arctic and other areas. They included northern Germany, the Bavarian and Swiss Alps, and the North Sea island of Heligoland.When the researchers examined the samples in a laboratory, they were surprised to find very high levels of microplastics.
Microplastics are very small pieces of plastic. These plastic particles are generally smaller than 5 millimeters in length. They come from the breakdown of man-made plastic products and industrial waste.
The study found the highest levels of microplastics came from the Bavarian Alps. One snow sample from the area had 154,000 microplastic particles per liter. Samples collected from the Arctic had much lower levels. However, even samples from the Arctic contained up to 14,000 particles per liter.
The study also attempted to explore how some of the material could have been carried in the atmosphere. A limited number of earlier studies did find microplastics in the air of some cities, including Paris, Tehran and Dongguan, China.
Bergmann Melanie co-wrote the report on the new study. She believes the new study clearly shows that “the majority of the microplastic in the snow comes from the air.” The new study suggests that much of the microplastic found in Europe and the Arctic comes from the atmosphere and snow.
While there is growing concern about the effect of microplastics on the environment, scientists are still studying their possible harmful effects on humans and animals. “I hope the new study will lead to more research on this issue. I think microscopic plastic particles should be included in worldwide observations of air pollution levels.We really need to know what effects microplastics have on humans, especially if inhaled with the air that we breathe.” Bergmann said.
1.Why did scientists collect samples from so many places in paragragh 1?
A.To make the research convincing.
B.To attract people to explore there.
C.To measure the length of microplastics .
D.To examine the samples easily in the lab.
2.What is the second paragraph mainly about?
A.The risks of microplastics.
B.The transport of microplastics.
C.The breakdown of plastic products.
D.The description of microplastics.
3.What did the research team find about microplastics?
A.Many people threw them away at the Alps.
B.They were delivered to remote areas through air.
C.They could be caught sight of in the air.
D.They had no great effect on the environment.
4.What can be inferred from what Bergmann said in the last paragraph?
A.Scientists are worried about the the influence of microplastics.
B.We have found a practical solution to the environment problem.
C.The effect of microplastics on human must be urgently researched.
D.There is no need to change observations of air pollution levels.
高三英语阅读理解中等难度题查看答案及解析
Scientists have been interested for years in the observation that ratios(比率）of finger lengths differ in men and women. In men, the ring (fourth) finger is usually longer than the index (second); their so-called 2D :4D ratio is lower than 1. In females, the two fingers are more likely to be the same length. Because of this sex differences, some scientists believe that a low ratio could be a marker for higher prenatal hormone(产前激素）levels, although it’s not clear how the hormone might influence finger development. The 2D : 4D ratio has also been fingered in connection with brain-related characteristics—most often in males--such as depression, left-handedness, musical ability, and homosexuality.
In the latest such study, psychologist Mark Brosnan and colleagues at the University of Bath in the United Kingdom photocopied the hands of 74 boys and girls aged 6 and 7.They compared the measurements of the second and fourth fingers with the children's scores on a standard UK test of math and literacy. In boys, the lower the ratio, the better their math score, the team reports in the May issue of the British Journal of Psychology, The boys with the lowest ratios also were the ones whose abilities were most skewed in the direction of math rather than literacy. These differences are small but significant, says Brosnan. With the girls, there was no correlation between finger ration and numeracy, but those with higher ratios—probably indicating low hormone levels—had better scores on verbal abilities.
These sex-specific correlations show how tricky it is to define the roles of sex hormones, says psychologist S .Marc Breedlove of Michigan State University in East Lansing. The range of normal levels of the hormone is different in males and females, so comparable levels would have very different meanings depending on the sex of the individual. And the timing of hormone surges is as important as levels.
Nevertheless, Brosnan believes finger measurements might be useful for predicting cognitive abilities—although he acknowledges that “we are not suggesting that finger length measurements could replace SAT tests”. Others are more cautious, pointing out that scientists still have not confirmed that finger ratio is a reliable marker for prenatal hormone levels.
1.What can we learn from the first paragraph?
A. Scientists never show interest in people's fingers.
B. Many women have different kinds of fingers.
C. In males, the ring finger may equal the index in length.
D. In females, the ring finger may equal the index in length.
2.What is the author's attitude to Brosnan's research?
A. Supportive. B. Positive.
C. Neutral. D. Indifferent.
3.We can infer from the passage that .
A. in girls, the higher the ratio, the better their maths scores
B. finger length contributes to people's academic abilities
C. it is easy to give a definition of the roles of sex hormones
D. Brosnan is serious about his research
4.What's the main idea of this passage?
A. Finger ratio is critical to people's future.
B. Finger length measurements may be useful
C. Finger length is related to children’s scores.
D. Finger ratio is a reliable maker for hormone levels.
高三英语阅读理解困难题查看答案及解析
阅读理解。
Scientists around the world have been studying the warming of waters in the Pacific Ocean known as El Nino. The appearance of El Nino is known to affect the weather around the world. Scientists still do not completely understand it. Yet they now find they can use it to tell about the future in different areas of the world.
One example is the work of two scientists at Columbia University in New York, Mark Cane and Gordon Eshel. A scientist of Zimbabwe（津巴布韦）, Roger Buckland worked with them. They have found that when El Nino appears, Zimbabwe has little or no rain. This means corn crops in Zimbabwe are poor. The last El Nino was in 1991 to 1993. That was when southeastern Africa suffered a serious lack of rain.
The scientists wrote about their recent work in the publication Nature. Their computer program can tell when an El Nino will develop up to a year before it does. They suggest that this could provide an effective early warning system for southern Africa, and could prevent many people from starving.
1.El Nino is known as ________.
A. the changing of the weather in southern Africa
B. the weather which brings drought (旱灾) to Africa
C. the warming of waters in the Pacific Ocean
D. the weather phenomenon that brings heavy rains to Africa
2.Scientists study El Nino in order that ________.
A. they can put all this information into their computers
B. they can tell why Zimbabwe has little or no rain
C. they can do some research work in this field
D. they can provide a kind of early warning to the place that will suffer from drought
3.Which of the following is TRUE according to the passage?
A. Scientists come to understand how El Nino appears.
B. Three scientists from the USA work on this subject.
C. El Nino has something to do with Zimbabwe’s poor crops.
D. Southern Africa suffered a serious drought and many people died from hunger.
高三英语阅读理解中等难度题查看答案及解析
Scientists around the world have been studying the warming of waters in the Pacific Ocean known as El Nino （厄尔尼诺）. The appearance of El Nino is known to affect the weather around the world. Scientists still do not completely understand it. Yet they now find they can use it to tell about the future in different areas of the world.
One example is the work of two scientists at Columbia University in New York, Mark Cane and Gordon Eshel. A scientist of Zimbabwe（津巴布韦）, Roger Buckland worked with them. They have found that when El Nino appears, Zimbabwe has little or no rain. This means corn crops in Zimbabwe are poor. The last El Nino was in 1991 to 1993. That was when southeastern Africa suffered a serious lack of rain.
The scientists wrote about their recent work in the publication（出版物）Nature. Their computer program can tell when an El Nino will develop up to a year before it does. They suggest that this could provide an effective early warning system for southern Africa, and could prevent many people from starving.
1.El Nino is known as ___.
A. the changing of the weather in southern Africa
B. the warming of waters in the Pacific Ocean
C. the weather which brings drought（旱灾）to Africa
D. the weather phenomenon（现象）that brings heavy rains to Africa
2.Scientists study El Nino in order that ___.
A. they can provide a kind of early warning to the place that will suffer from drought
B. they can tell why Zimbabwe has little or no rain
C. they can do some research work in this field.
D. they can put all this information into their computers.
3.Which of the following is TRUE according to the passage?
A. Scientists come to understand how El Nino appears.
B. Three scientists from the USA work on this subject.
C. Southern Africa suffered a serious drought and many people died from hunger.
D. El Nino has something to do with Zimbabwe’s poor crops.
4.Which of the following is NOT true according to the article?
A. The computer is used in this research work.
B. Scientists know when an El Nino appears by means of the computer program.
C. The scientists published their results of the research work.
D. Nature is the name of the article written recently by the scientists.
5.What’s the best title for this passage?
A. Appearance of El Nino is Predictable（可预测的）
B. Drought in Zimbabwe
C. Early Warning System
D. Weather in Africa
高三英语阅读理解中等难度题查看答案及解析
A group of graduates have highly been established in their careers. One day they got together to their old university professor. Shortly they arrived, their conversation turned into complaints about in work and life. In order to his guests coffee, the professor went to the kitchen and returned a large pot of coffee and a variety of cups made of porcelain(陶瓷的), plastic, glass or crystal. Some of
are plain looking, some expensive, and some are exquisite(做工精致的). The told them to help themselves to the coffee.
When the students had a cup of coffee in hand, the professor said:
If you noticed, all the nice looking cups were taken up, behind the plain and cheap ones. it is normal for you to want only the best for yourselves, that is the of your problems and stress.
all of you really wanted was coffee, not the cup, you consciously went for the best cups and were seeing each other’s .
Now consider this: is the coffee and the jobs, money and position in society are the cups. They are tools to hold and contain life, and do not change the of life. Sometimes, by concen- trating only on the cup, we to enjoy the coffee God has provided. So, don’t let the cups drive you. . . the coffee instead.
1. A. call at B. call on C. call for D. call up
2. A. after B. before C. when D. as
3. A. happiness B. joy
C. satisfaction D. stress
4. A. offer B. provide C. make D. supply
5.A. for B. to C. with D. along
6. A. whom B. which C. them D. it
7. A. students B. professor
C. son D. wife
8. A. all B. so me of
C. none of D. both
9. A. cheap B. ordinary
C. glass D. expensive
10.A. leaving B. remaining
C. keeping D. staying
11. A. Because B. Since
C. While D. If
12. A. source B. resource
C. end D. solution
13. A. That B. What
C. Anything D. Something
14. A. and B. so C. thus D. but
15. A. cups B. coffee C. eyes D. faces
16. A. Work B. Life C. Career D. Study
17.A. more than B. rather than
C. just D. not only
18. A. quantity B. quality
C. pace D. style
19. A. manage B. try
C. attempt D. fail
20. A. enjoy B. drink C. have D. share
高三英语完型填空中等难度题查看答案及解析
I was not good in math in the first year of junior high schoo1.Having been failed so many times in math exams，I was anxious about the subject．Every time I tried hardly to work out a math problem，I was afraid of making mistakes，that really made me feel helpless．Luckily，I met a nice math teacher in second year. She told me that I didn’t need to worry about making mistakes because I could find out my shortcomings through my mistake．She always encouraged myself to try again whenever I make a mistake．Thanks to my teacher’s encouragement，I became interesting in math and made rapid progress．My experience proves that failure was the mother of success and that we can learn a lot from our mistakes．
高三英语短文改错中等难度题查看答案及解析
In the last 20 years of my life, I have been interested in self-improvement and applying it to myself in many ways. And of course all through that time I have learnt a lot and made it much .
So in the last 3 months I seem to have reached this high level. I feel a miracle has happened to me, in fact the other day I couldn’t stop staring at myself in the making sure all these wonderful things were happening to me! Then I cried a small , not because of what I looked like, but because I was so for the person I had become.
Several things have happened to make me ensure that my track in life has truly . I moved back to my hometown after being away a decade and was astonished that so many people my name in a nice way, greeted me and me back. And over the next 3 months they were excited for my growth. At the where I exhibit today, people come over and greet me, I see the on their faces when they talk to me frankly and . Thus I think they are my expression or style. I know I give them a good feeling at the fairs not just from keeping my expression open, understanding, kind but with a smile in all the right places. But now I do feel that what I have done for the people may bring them a bit of sympathy.
And most of all I believe in the mirror I have ever been doing the hard work, improving myself and now I feel it’s coming back to me in absolute roads and I am considered to be a man of great future.
1.A. easier B. healthier C. happier D. better
2.A. wonderful B. helpful C. useful D. harmful
3.A. window B. mirror C. area D. road
4.A. sorrow B. fear C. tear D. voice
5.A. hopeful B. anxious C. grateful D. proud
6.A. nearly B. really C. hardly D. equally
7.A. appeared B. improved C. moved D. changed
8.A. remembered B. recognized C. called D. reminded
9.A. took B. welcomed C. turned D. got
10.A. markets B. trades C. halls D. fairs
11.A. Expression B. impression C. Confusion D. emotion
12.A. Slowly B. sincerely C. loudly D. annually
13.A. Copying B. shaping C. Showing D. learning
14.A. Brave B. quiet C. sweet D. simple
15.A. value B. reflection C. effect D. function
高三英语完形填空中等难度题查看答案及解析
High levels of chocolate consumption might be associated with a one third reduction in the risk of developing heart disease, suggests a study published online in the British Medical Journal. The findings confirm results of existing studies that generally agree on a potential beneficial link between chocolate consumption and heart health. However, the authors stress that further studies are needed to test whether chocolate actually causes this reduction or if it can be explained by some other unmeasured factor.
The World Health Organization predicts that by 2030, nearly 23 6 million people will die from heart disease. However, lifestyle and dict are key factors in preventing heart disease, says the paper, A number of recent studies have shown that eating chocolate has a positive influence on human health due to its antioxidant and anti-inflammatory properties. This includes reducing blood pressure and improving insulin sensitivity.
However, the evidence about how eating chocolate affects your heart still remains unclear. So, Dr Oscar Franco and colleagues from the University of Cambridge carried out a large scale review of the existing evidence to evaluate the effects of eating chocolate on cardiovascular(心血管)events like heart attack and stroke.
They analyzed the results of seven studies, involving over 100,000 participants with and without existing heart disease, For each study, they compared the group with the highest chocolate consumption against the group with the lowest consumption.
Five studies reported a beneficial link between higher levels of chocolate consumption and the risk of cardiovascular events. They found that the “highest levels of chocolate consumption were associated with a 37% reduction in cardiovascular disease and a 29% reduction in stroke compared with lowest levels.” No significant reduction was found in relation to heart failure.
The authors say the findings need to be interpreted with caution, in particular because commercially available chocolate is very calorific (around 500 calories for every 100 grams)and eating too much of it could lead to weight gain, risk of diabetes and heart disease.
However, they conclude that given the health benefits of dating chocolate, initiatives to reduce the current fat and sugar content in most chocolate products should be explored.
1.Which statement is NOT true according to the passage?
A. There used to be studies about the beneficial link between chocolate consumption and heart health.
B. Millions of people will die from heart disease according to the WHO
C. There are still other factors that may reduce the risk of heart disease.
D. There is clear evidence about how eating chocolate affects your heart.
2.What are the possible causes of heart disease ?
A. Eating chocolate
B. Unhealthy diet
C. Exercising regularly
D. Drinking coffee.
3.What’s the authors’ attitude towards the findings?
A. cautious
B. doubtful
C. disapproving
D. negative
4.What can be inferred from the last paragraph?
A. We should eat less chocolate.
B. Chocolate benefits our health.
C. We should consider the fat and sugar problem.
D. Eating chocolate will lead to fat gain naturally.
高三英语阅读理解中等难度题查看答案及解析
Lead poisoning (铅中毒) occurs when lead is present in high levels in the blood of a person. It is one of the most common medical problems found in children. And it’s important to recognize the presence of lead in children’s bodies because lead is very harmful.
Children have the tendency to go around and put things in their mouths like paint peelings (油漆层剥皮). This is one of the main causes of lead poisoning. It has also been found that children born in poor families have higher chances of getting exposed to lead.
Some of the common symptoms of lead poisoning in children are headaches, stomach pains, hair loss, muscle weakness and weight loss, etc.
Lead poisoning can have severe effects and can lead to heart diseases, kidney diseases and neurological (神经系统的) problems. It can also cause mental dullness and a low IQ level. There have been cases where lead poisoning proved to be terminal for children.
It’s difficult to easily recognize whether a child is affected by lead poisoning, as the symptoms of this disease can occur due to some other medical problems. Therefore, children under the age of six should regularly be checked to know the level of lead in their blood through blood tests. It’s possible to completely cure a child with lead poisoning through treatment. Usually the oral medicine chelator (螯合剂) is given to the children. Sometimes, children are given an injection (注射) for reducing the lead level. Children who have very high level of lead in their blood would need treatment for a long period of time and would also be put on a special diet.
Parents have to take certain precautions to lower the chance of lead poisoning in children. Cleaning the house regularly and removing shoes at the door after coming in from outside will prevent the lead particles from entering the house. Children should be put on a healthy diet, containing high proportions (比例) of calcium and iron, such as eggs, milk, fruits, potatoes, etc, which helps to keep the lead levels in control in the children’s bodies.
In short, it’s a must to be cautious and careful and protect your children from the horrible consequences of lead poisoning.
Lead Poisoning in Children
Ⅰ. 1.
* Children’s going around and 2. in their mouths.
* High chances of blood lead.
Ⅱ. Symptoms
*Headaches, stomach pains, hair loss, muscle weakness, and weight loss, etc.
Ⅲ. 3.
* Leading to heart diseases, kidney diseases and neurological problems.
* 4. in mental dullness and a low IQ level.
Ⅳ. Treatment
* Making children take the chelator or 5. an injection to reduce the lead level.
* Putting children with a very high lead level on 6. .
Ⅴ. Suggestions / Preventions
* Cleaning the house regularly
* 7. shoes at the door after coming in from the outside.
* Letting children eat healthy food rich in 8. .
Ⅵ. 9.
* Being cautious and careful to 10. from lead poisoning.
高三英语其他题中等难度题查看答案及解析