The largest land animal remaining on the earth, the African elephant is of much importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a giant plant-eater, it significantly shapes the forest-and-savanna (大草原) surroundings in which it lives, therefore deciding the conditions of existence for millions of other animals that live in its habitat.
It is the elephant’s great desire for food that makes it both a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, as well as pulls branches off big trees. This results in numerous open spaces in not only deep tropical forests but also the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth, which attract a variety of other plant-eaters.
Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants create open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large-hoofed plant-eaters to move around and for small-sized plant-eaters to obtain their food as well.
Scientists are worried now that the African elephant has become an endangered species. If the elephant dies out, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.
1.What is the passage mainly about?
A. Disappearance of African elephants.
B. Forests and savannas as habitats for African elephants.
C. The effect of African elephants' search for food.
D. The eating habit of African elephants.
2.The African elephant influences the ecosystem in the following ways except that .
A. it creates open areas in deep tropical forests as well as woodlands
B. it pulls off the branches and leaves, shutting out the sunshine
C. its eating habit can be made use of by large-hoofed and small-sized animals
D. it encourages some kinds of plants growing in an indirect way
3.According to the passage, which of the following statements is true?
A. Numerous grown plants are the favorites of plant-eaters.
B. The extinction of the African elephant has nothing to do with the ecosystem.
C. Quantities of plants are consumed by African elephants, including branches and underbushes.
D. The forest floor in rain forests is scarcely dotted with new shoots.
4.The passage is developed mainly by .
A. presenting the changes in time order
B. making comparisons and giving examples
C. classifying similarities and differences
D. showing the effect and then explaining the reasons
高三英语阅读理解中等难度题
The African elephant, the largest land animal remaining on earth, is of great importance to African ecosystem(生态系统). Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest- and-savanna(大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.
It is the elephant’s great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas . In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.
Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.
What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.
1. What is the passage mainly about?
A. Disappearance of African elephants.
B. Forests and savannas as habitats for African elephants.
C. The effect of African elephants' search for food.
D. The eating habit of African elephants.
2. What does the underlined phrase “setting the terms” most probably mean?
A. Fixing the time.
B. Worsening the state.
C. Improving the quality.
D. Deciding the conditions.
3. What do we know about the open spaces in the passage?
A. They result from the destruction of rain forests.
B. They provide food mainly for African elephants.
C. They are home to many endangered animals.
D. They are attractive to plant-eating animals of different kinds.
4. According to the passage, which of the following statements is true?
A. The African elephant is the largest animal on earth.
B. African elephants have 300 pounds of plants every day.
C. The African elephant is in a way the builder of the environment like all the other land animals.
D. If the African elephant disappears, the whole ecosystem won’t be affected.
5. The passage is developed mainly by ________.
A. showing the effect and then explaining the causes
B. pointing out similarities and differences
C. describing the changes in space order
D. giving examples
高三英语阅读理解中等难度题查看答案及解析
The African elephant,the largest land animal remaining on earth,is of great importance to African ecosystem(生态系统).Unlike other animals,the African elephant is to a great extent the builder of its environment.As a big plant-eater,it largely shapes the forest-and-savanna(大草原) surroundings in which it lives,therefore setting the terms of existence for millions of other animals that live in its habitat(栖息地).
It is the elephant’s great desire for food that makes it a disturber of the environment and an important builder of its habitat.In its continuous search for the 300 pounds of plants it must have every day,it kills small trees and underbushes,and pulls branches off big trees.This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas.In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.
Take the rain forests for example.In their natural state,the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor.By pulling down trees and eating plants,elephants make open spaces,allowing new plants to grow on the forest floor.In such situations,the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.
What worries scientists now is that the African elephant has become an endangered species.If the elephant disappears,scientists say,many other animals will also disappear from vast areas of forest and savanna,greatly changing and worsening the whole ecosystem.
1.What is the passage mainly about?
A.Disappearance of African elephants.
B.Forests and savannas as habitats for African elephants.
C.The effect of African elephants’ search for food.
D.The eating habit of African elephants.
2.What does the underlined phrase “setting the terms” most probably mean?
A.Fixing the time.
B.Worsening the state.
C.Improving the quality.
D.Deciding the conditions.
3.What do we know about the open spaces in the passage?
A.They result from the destruction of rain forests.
B.They provide food mainly for African elephants.
C.They are home to many endangered animals.
D.They are attractive to plant-eating animals of different kinds.
4.The passage is developed mainly by ______.
A.showing the effect and then explaining the causes
B.pointing out similarities and differences
C.describing the changes in spare order
D.giving examples
高三英语阅读理解中等难度题查看答案及解析
The largest land animal remaining on the earth, the African elephant is of much importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a giant plant-eater, it significantly shapes the forest-and-savanna (大草原) surroundings in which it lives, therefore deciding the conditions of existence for millions of other animals that live in its habitat.
It is the elephant’s great desire for food that makes it both a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, as well as pulls branches off big trees. This results in numerous open spaces in not only deep tropical forests but also the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth, which attract a variety of other plant-eaters.
Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants create open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large-hoofed plant-eaters to move around and for small-sized plant-eaters to obtain their food as well.
Scientists are worried now that the African elephant has become an endangered species. If the elephant dies out, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.
1.What is the passage mainly about?
A. Disappearance of African elephants.
B. Forests and savannas as habitats for African elephants.
C. The effect of African elephants' search for food.
D. The eating habit of African elephants.
2.The African elephant influences the ecosystem in the following ways except that .
A. it creates open areas in deep tropical forests as well as woodlands
B. it pulls off the branches and leaves, shutting out the sunshine
C. its eating habit can be made use of by large-hoofed and small-sized animals
D. it encourages some kinds of plants growing in an indirect way
3.According to the passage, which of the following statements is true?
A. Numerous grown plants are the favorites of plant-eaters.
B. The extinction of the African elephant has nothing to do with the ecosystem.
C. Quantities of plants are consumed by African elephants, including branches and underbushes.
D. The forest floor in rain forests is scarcely dotted with new shoots.
4.The passage is developed mainly by .
A. presenting the changes in time order
B. making comparisons and giving examples
C. classifying similarities and differences
D. showing the effect and then explaining the reasons
高三英语阅读理解中等难度题查看答案及解析
Blue whales, the earth’s largest animals, call to others of their kind, though exactly what these cries communicate remains a mystery. But these sounds have begun evolving (演变). Since at least the 1960s, the pitch (音调) of Antarctic blue whales has downshifted. Scientists have theories as to why: all involving humans.
The deepening of their sounds is not unique. Many blue whales around the world have also dropped their pitch. In a study last year that analyzed more than 1 million individual recordings of whale calls, scale shifts were found across species, and among populations that don’t necessarily interact with one another. This is to say, whatever has caused the change doesn’t seem to have a specific geographic origin.
The underwater noises caused by ocean traffic and at-sea industries might seem a likely criminal. However, scientists have identified lowered pitches even across populations of whales that live in seas without major shipping routes.
One possible explanation for the change is the achievements of global conservation efforts. As their populations have grown, then, the whales may have decreased their volume because they are more likely to be communicating over short distances.
Last year’s study of whale calls also suggests a threatening reason for the drop in pitch, however. Perhaps whales don't need to be so loud because sound waves travel farther in oceans made acidic by the absorption of carbon dioxide.
Carbon dioxide in the atmosphere, meanwhile, may also indirectly influence whale voices in other ways. Recent study shows that, during the summer, the whales must use their top volume to be heard in the cracking ice — a natural sound increased by unnatural processes, as rising temperatures worsen ice-melt. So the impacts of a warming planet may modulate animal sounds even in remote places.
1.To what extent is whales’ pitch drop?
A.Across the species.
B.In the Antarctic Ocean.
C.Among some populations.
D.Within one million individuals.
2.What causes the evolving of whales’ pitch according to the text?
A.Less communication and more threat.
B.Protection efforts and acidic sea water.
C.Sharp decrease of whales’ populations.
D.Underwater noises by ships and industries.
3.What does the underlined word “modulate” mean in the last paragraph?
A.Produce. B.Damage. C.Balance. D.Change.
4.What can we infer from the text?
A.Man is the soul of nature.
B.Man and nature are in one.
C.Nature pardons no mistakes .
D.Nature has the final say over man.
高三英语阅读理解中等难度题查看答案及解析
On the high-speed train Avignon to Paris, my husband and I landed in the only remaining seats on the train, in the middle of a car, directly opposite a Frenchwoman of middle years. It was an extremely uncomfortable arrangement to be looking straight into the eyes of a stranger. My husband and I pulled out books. The woman produced a large makeup case and made up her face. Except for a lunch break, she continued this activity for the entire three-hour trip. Every once in a while she surveyed the car with a bright-eyed glance, but never once did she catch my eye. My husband and I could have been a blanket wall.
I was amused, but some people would have felt uncomfortable , even repulsed(厌恶的）.there is something about making up in public that calls up strong emotional reactions. Partly it’s a question of hygiene. And it’s a matter of degree. Making up --- a private act--- has a way of neglecting the presence of others. I was once seated at a party with a model-actress who immediately waved a silly brush and began dusting her face at the table, demonstrating that while she was next to me, she was not with me.
In fact, I am generally prohibited from making up in public, except when I am in the company of cosmetics moment. In a gathering more professional than social, I would do so.
Kathy Peiss, a history professor at the University of Massachusetts in Amherst says that nose-powdering in the office was an occasion for outrage in 1920’s and 30’s. Deploring the practice as a waste of company time, trade journals advises managers to discourage it among workers. Peiss theorizes that it was female’s making up in what has been an all-male field that disturb some gentlemen.
Peiss tells me that after the 30’s , pulling out a make-up case was no longer an issue. It became an accepted practice. I asked if she feels free to apply lipstick at a professional lunch herself. Sounding mildly shocked, she says she would save that for the privacy of her car afterward. Why? Because it would be “a gesture of inappropriate feminity(女性化）.” One guess is that most professional women feel this way. There is evidence of the popularity of the new lipsticks that remain in place all day without retouching.
1.According to the author, “My husband and I could have been a blanket wall.” (Line 6, Para.1) most probably means “________”.
A. We were treated with an expressionless face.
B. We looked at the French woman expressionlessly
C. We used books as a wall to avoid the woman’s eyes
D. We were of no existence in the French woman’s eyes
2.In the author’s opinion, she _______.
A. allows public making up on certain occasions
B. feels comfortable when making up in public
C. only makes up on social occasions
D. makes up before any professional gatherings
3.According to Peiss, nose powdering in an office was criticized mainly for the reason that ____.
A. normal office work was disturbed
B. it discouraged women’s interest in career
C. make dominance was emphasized there
D. it distracted make workers’ focus on work
4.Why do most professional women give up using lipsticks in public?
A. Because they are worried about being looked down upon
B. Because it emphasizes their female features in wrong situations
C. Because it implies women’s disadvantages in academic fields
D. Because they are ashamed to be seen making up in front of males/
5.It can be inferred that in a highly open society, the differences between men and women ______.
A. have attracted little attention
B. hinder the social development
C. are attractive topics in talk shows
D. still call for great concern
高三英语阅读理解中等难度题查看答案及解析
The pilot asked all the passengers on board to remain _________ as the plane was making a landing.
A. seat B. seating C. seated D. to be seating
高三英语单项填空简单题查看答案及解析
The pilot asked all the passengers on board to remain _________ as the plane was making a landing.
A. seat B. seating C. seated D. to be seating
高三英语单项填空中等难度题查看答案及解析
Earth Day is one of the world's largest environmental movements. Held every year on April 22, Earth Day turns 50 this year. It was created by US politician Gaylord Nelson, aiming to give a voice to people who wanted environmental protection. 1. Back then, it helped to bring clean air and water laws to the US. Now a global movement, it's facing even bigger environmental threats.
2. One of these is The Ocean Cleanup based in the Netherlands. It has successfully made a device that can gather and collect waste from our oceans and rivers, a majority of which is plastic. For us, plastic is an item we use and then throw away. But if you throw away a plastic bottle today, it is non-biodegradable (不可生物降解的).It will still be around for hundreds of years. Much of this plastic waste ends up in the sea, where it kills more than 100 million sea creatures every year. 3.
It is not just our oceans that are under threat. Over time, deforestation (滥伐森林)，improper farming, and livestock grazing (放牧)can stop green areas from growing. 4. A Chinese non-governmental organizations (NGO) — The China Green Foundation — is working to change this by planting millions of trees. Another NGO that is making big changes is Welfare Togo. Togo is a developing country in Africa. It faces many environmental problems, including air and water pollution and desertification. To help, Welfare Togo opened 31 schools across the country that focus on teaching sustainable development. Its aim is using education to bring positive environmental changes to Togo.
5. However, through small everyday changes, such as recycling correctly, we can also bring about considerable changes to our natural world.
A.This is called desertification.
B.It aims to support environmental protection around the world.
C.His idea was so successful that more than 20 million people joined in Earth Day events.
D.However, because of high demand, we still make more than 300 tons of new plastic every year.
E.It challenges people to promote environmental education.
F.Not all of us can make such large contributions.
G.Fortunately, many NGOs are stepping up to promote positive changes.
高三英语七选五中等难度题查看答案及解析
FAST, the largest ‘ear’ on Earth, can listen for distant signals in the universe, using technology five times more powerful than ______ was previously available.
A.how B.which C.that D.what
高三英语单项填空中等难度题查看答案及解析
All passengers ____, please fasten your seat belts and remain seated ____the plane is landing．
A．on board; until B．abroad; since C．on the board; before D．aboard; when
高三英语单项填空简单题查看答案及解析