More than two thirds of the world's polar bea...

More than two thirds of the world’s polar bears will be wiped out by 2050, according to a shocking new study. By then, scientists say, global warming will have melted 42 percent of the Arctic sea ice. By 2100, only a very few of these important creatures will be left.

The report has been produced by the US Geological Survey. The scientists have publicized their findings in the hope of influencing US Interior Secretary Dirk Kempthorne, who has been asked to put polar bears on the US endangered species list.

Polar bears depend on floating sea ice as a platform for hunting seals, which are their main food. Without enough ice, polar bears would be forced to go onto the land, where they are poorly skilled hunters, and would be unlikely to adapt to the life on the land in time. Experts say few little bears would survive and the stress could make many females unable to get pregnant.

The team of American and Canadian scientists spent six months studying bears, on the ground, from spotter planes and in the lab，using computer models. Some team members fear the result is even worse for the bears than what their report says. They say the Arctic is warming faster than anywhere in the world and much faster than their computer had been forecasting. Satellite observations have showed that the ice has decreased to an all­time low.

However, not everyone in the scientific community believes that global warming is happening on such an alarming scale. Another investigation has found that polar bears are still being hunted by wealthy “sportsmen” who want their skins and heads. At least ten international companies offer bear­hunting trips.

1.What do we know about Dirk Kempthorne according to the passage?

A. He is an animal scientist.

B. He is a protector of animals working for the US government.

C. He was asked to put polar bears on the US endangered species list.

D. He offered to put polar bears on the endangered species list.

2.Why will polar bears die out if there is not enough sea ice?

A. Because polar bears can’t catch enough food without ice.

B. Because polar bears eat ice when they feel thirsty.

C. Because polar bears will be easily found by hunters without ice.

D. Because most female bears are used to giving birth under ice.

3.After a six­month study, some scientists fear that________.

A. there is something wrong with their computers

B. polar bears will disappear even faster than they ever expected

C. their computer models are not as accurate as they expected

D. global warming will destroy everything in the Arctic

高一英语阅读理解简单题查看答案及解析

More than two thirds of the world's polar bears will be wiped out by 2050，according to a shocking new study. By then，scientists say，global warming will have melted 42 percent of the Arctic sea ice. By 2100，only a very few of these important creatures will be left.

The report has been produced by the US Geological Survey. The scientists have publicized their findings in the hope of influencing US Interior Secretary Dirk Kempthorne，who has been asked to put polar bears on the US endangered species list.

Polar bears depend on floating sea ice as a platform for hunting seals，which are their main food. Without enough ice，polar bears would be forced to go onto the land，where they are poorly skilled hunters，and would be unlikely to adapt to the life on the land in time. Experts say few little bears would survive and the stress could make many females unable to get pregnant.

The team of American and Canadian scientists spent six months studying bears，on the ground，from spotter planes and in the lab，using computer models.

Some team members fear the result is even worse for the bears than what their report says. They say the Arctic is warming faster than anywhere in the world and much faster than their computer had been forecasting. Satellite observations have showed that the ice has decreased to an all－time low.

However，not everyone in the scientific community believes that global warming is happening on such an alarming scale. Another investigation has found that polar bears are still being hunted by wealthy “sportsmen” who want their skins and heads. At least ten international companies offer bear－hunting trips.

1.What do we know about Dirk Kempthorne according to the passage?

A．He is an animal scientist.

B．He is a protector of animals working for the US government.

C．He was asked to put polar bears on the US endangered species list.

D．He offered to put polar bears on the endangered species list.

2.Why will polar bears die out if there is not enough sea ice?

A．Because polar bears can't catch enough food without ice.

B．Because polar bears eat ice when they feel thirsty.

C．Because polar bears will be easily found by hunters without ice.

D．Because most female bears are used to giving birth under ice.

3.After a six－month study，some scientists fear that ________．

A．there is something wrong with their computers

B．polar bears will disappear even faster than they ever expected

C．their computer models are not as accurate as they expected

D．global warming will destroy everything in the Arctic

4.What does the writer want to tell us in the last paragraph?

A．The forecast about the future of polar bears is not correct.

B．Global warming won't have any effect on hunting trips in the Arctic.

C．Polar bears are an endangered species as a result of bear－hunting.

D．People don't pay enough attention to the protection of endangered species.

高一英语阅读理解中等难度题查看答案及解析

WASHINGTON—Two-thirds of the world’s polar bear population could be gone by 2050 if predictions of melting sea ice hold true, the US Geological Survey reported on Friday.

The fate of polar bears could be even worse than that estimate, because sea ice in the Arctic might be disappearing faster than the available computer models predict, the geological survey said in a report aimed at determining whether the big white bear should be listed as a threatened species.

“There is a definite link between changes in the sea ice and the welfare of polar bears,” said Steve Amstrup, who led the research team. He says Arctic sea ice is already at the lowest this year and is expected to retreat(退却) farther this month.

That means that polar bears—some 16,000 of them -- will disappear by 2050 from parts of the Arctic where sea ice is melting most rapidly, along the north coasts of Alaska and Russia, researchers said in a telephone briefing(简报).

Other polar bears could survive beyond that date but many of those could be gone by 2100, Amstrup said. By this century’s end, the only polar bears left might live in the Canadian Arctic islands and along the west coast of Greenland.

“It is likely to result in loss of approximately two-thirds of the world’s current polar bear population by the mid 21st century,” the report’s executive summary said.

“Because the observed trajectory(轨迹)of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative(保守的).”

In January, the US Fish and Wildlife Service proposed listing the polar bear as a threatened species, noting polar bears depend on sea ice as a platform to hunt seals, their main food.

Without enough sea ice, polar bears would be forced onto land, but they are poor hunters once they get out of the water and ice, the researchers said. The bears’ disappearance would probably take place as young cubs(幼兽)failed to survive to adulthood and females were unable to reproduce successfully.

1.What was the US Geological Survey intended to do?

A. To determine whether the polar bear was in danger.

B. To measure how fast the sea ice melts in the Arctic.

C. To check the predictions of the computer models.

D. To find out the exact number of the polar bear.

2.What causes the polar bears to disappear by 2050?

A. The pollution of the Arctic region.    B. The sea ice melting at high speed

C. Fewer food sources being left.         D. The temperature getting colder.

3.The key to preventing polar bears dying out seems to _______________.

A. help young polar bears to survive the cold winter

B. have large number of seals living in the oceans

C. make sure there is enough sea ice in the Arctic

D. provide chances for adult polar bears to reproduce

高一英语阅读理解中等难度题查看答案及解析

Two-thirds of the world’s major rivers have now been disrupted (中断) with more than 50,000 dams in an attempt to stole water and provide power. In the US, there are more than 85,000 dams, disrupting large and small rives and in most cases transforming natural flow. The most famous of these, the Hoover Dam constructed in the 1930’s, is mainly responsible for the fact that the Colorado River no longer reaches the ocean.

Dams besides all their attractive benefits also have negative impacts. Creating a reservoir means a large area must be flooded. Communities may lose their land, houses and cultural relics. Downstream (在下游方向) of a dam, the flow may be reduced so that farmers cannot irrigate (灌溉) their field.

Environmentally the new reservoir can be a paradise for wildlife especially birds. However it can cause greenhouse gas emissions (排放) and poison the water for fish. Also the dramatic rise and fall of water levels during dam releases is too extreme for plains and animals to cope with resulting in dead zones around the shores of reservoirs. Fish that lay their eggs in the sha Mows for example may find a few hours later that those sites are high and dry.

Dams don’t just block water flow. The flow may be reduced so that farmers will have great trouble getting water for their fields. They also prevent fish migrations and are a barrier to sediment (沉淀物) flows. Instead of rushing downriver sediments get backed up against the dam wall, which cause the reservoir level to increase over time. However, sediments which are rich in nutrients have become a problem. The fertility (富饶) of the entire system can be influenced with soils lost during seasonal rains not being replaced.

Perhaps the biggest problem can be seen in deltas (三角洲) often host to large cities, which are sinking into the oceans. Groundwater is being extracted to feed the city causing the urban weight to sink and sediments washed away by the ocean are no longer being replaced. The result is that sea level rise in cities from Shanghai to Alexandria.

1.What effects does creating a reservoir have on people’s life?

a. People will see fewer birds near the rivers.

b. Farmers below the dam may have less water to irrigate their field.

c. Visitors can’t see some cultural relics anymore.

d. More conflicts and wars over water will break out.

e. All kinds of fish will become extinct in the future.

A.b　 c B.c　 e

C.b　 e D.a　 c

2.With many dams built across rivers fish will______________.

A.find more places to lay their eggs B.feed on more sediment rich in nutrient

C.face a more dangerous living habitat D.find it easier to deal with the rise of water

3.How can dams influence the cities like Shanghai?

A.Its entire system will be influenced. B.It will lie below sea level in the future.

C.The rainy season will last longer. D.Rich soils will be washed away.

4.What does the text mainly talk about?

A.Environmental benefits of dams. B.Cultural loss dam.

C.Economical gain of dams. D.Environmental loss of dams.

高一英语阅读理解中等难度题查看答案及解析

More than anything else in the world, Lion liked being King of the jungle(丛林). He walked around, showing off his power and pride.

Each day Lion took a long lazy sleep under the shade of his favourite tree. He always dreamed of weaker animals bowing(鞠躬) before him.

One day Mouse ran through the jungle and tripped over Lion’s huge paws. Lion woke up with a start. “How dare you wake me up!” he shouted angrily. Lion grabbed(抓住) Mouse with one paw. “On the second thought, I’m in the mood for the snack, and you’ll make a delicious meal.”, he said.

Mouse cried out, “King Lion, please spare(饶恕) me! If you let me live, I’ll always remember your kindness. And, some day, I might be able to help you.”

“How could such a powerless little mouse ever help me?” That thought made Lion laugh so much that he decided to let Mouse go. A week later, Lion was walking through the jungle on the way to his favourite tree when he stepped onto a hunter’s net. The net scooped him up. No matter how he twisted and turned, he couldn’t escape.

When Mouse heard Lion’s frightened shouts, he raced to help. Mouse quickly chewed(咬) through the ropes to make a hole in the net. Soon, Lion moved out and was free. Lion looked down at the little mouse. “Thank you for saving my life,” said Lion, smiling his widest smile. “I was mistaken. You are not a powerless little mouse. You are a great friend!”

1.What did Lion do each day?

A. He stepped onto a hunter’s net.

B. He bowed before weaker animals.

C. He showed kindness to animals in the jungle.

D. He had a good sleep under his favourite tree.

2.How did Mouse wake up Lion?

A. He made a hole in the net.

B. He shouted at Lion angrily.

C. He tripped over Lion’s paws.

D. He prepared a delicious meal for Lion.

3.Why did Lion let Mouse go?

A. Because he was trapped in the net.

B. Because he took Mouse as his good friend.

C. Because he believed Mouse could save him.

D. Because he doubted(怀疑) if Mouse could be of any help.

4.What do you think of Mouse?

A. Clever and honest(诚实的).

B. Silly (傻的) and lazy.

C. Humorous and stubborn(倔强的).

D. Proud and selfish.(自私的)

5.What can we learn from the passage?

A. Pride makes you lose what you have.

B. Don’t put all your eggs in one basket.

C. Even the small can show great strength.

D. When the cat’s away, the mice will play.

高一英语阅读理解中等难度题查看答案及解析

The new castle being built for fun will be _____ the present one。

高一英语单项填空中等难度题查看答案及解析

Polar bears are suffering in a　 1.(warm) world.

Polar bears live in environments too cold for most animals.2.much of the year, they live and hunt on the frozen Arctic sea ice. Nature has prepared 3.for the cold conditions. But nothing has prepared the bears for the danger that 4. (threat)the only home they know.

The polar bears’ world is melting. Studies show that the polar ice has reduced by 9.8% every 10 years 5. 1978. Now about 20,000 to 25,000 polar bears live in the Arctic. Polar bears depend on the sea ice for their 6. (survive). “The sea ice is more than just this platform that the bears walk over,” says Andrew Derocher, 7. scientist who studies North American polar bear populations. “8. it, they can’t exist.”

Some melting and refreezing of the polar ice is natural. 9. in a warmer world, these cycles speed up, and bears have less time to hunt. Normally, they have three months in the spring when they gain more weight. The extra fat is used later,  10. the bears are not actively hunting.

高一英语短文填空中等难度题查看答案及解析

More than half of the world’s population live in cities. Traffic and pollution are becoming big problems in big cities all over the world. In cities like Mexico City, Shanghai or Cairo the quality of air is getting worse every day. In the United States, people spend more time sitting in traffic jams.

Some of the world’s cities have already found the answer to the problem. In Bogota, the capital of Columbia, the government has taken measures to improve the quality of life for the city’s 8 million people. They created over a thousand new parks, a new public transport system, and built hundreds of cycling and walking paths. People who live in the city also joined in making their city one of the most livable (适合居住的) places in South America.

Today city planners around the world are looking for ways to provide more room for living and less room for cars. In America, public transport has increased over 2 % since the mid 1990s — not much but a start. More and more people leave their cars at home and get on buses, trains or even ride a bike to work. Some cities are far better at planning than others. In Amsterdam, for example, only 40 % of the population use their cars to get to work, 35 % ride bikes while 25% use public transport. In Paris, about half of the city’s workers drive their cars to work.

For cities in developing countries, the problems have just started. Traffic is getting worse as more and more people can afford to buy a car.

1.The writer listed Mexico City, Shanghai and Cairo as examples of cities of ______.

A. heavy traffic          B. air pollution

C. rapid development        D. large population

2.What did Bogota do to improve the quality of life for its people?

A. It shut down some factories in the city.

B. It introduced a foreign public transport system.

C. It encouraged people to plant trees in the city.

D. It built new parks and a new public transport system.

3.From the third paragraph, we can learn that ______.

A. 35% of the population in Paris ride bikes to work

B. half of the people in Amsterdam drive their cars to work

C. a quarter of the people in Amsterdam use public transport

D. American public transport has increased much since the 1990s

4.What would be the best title of the text?

A. Ways to solve traffic jams

B. New changes in transport systems

C. People’s new choice in big cities

D. Parks instead of cars for cities

高一英语阅读理解中等难度题查看答案及解析

1.If you don’t know how to use a computer, you had better ask for the position of _______.

A. a secretary in NESTLE

B. a production worker in NESTLE

C. a senior engineer in THYSSEN

D. a cost accountant in THYSSEN

2.From the passage we can learn that _______.

A. THYSSEN is a successful company with many branches

B. NESTLE is a company only producing chemical products

C. NESTLE asks for good command of English in every Position

D. THYSSEN needs a senior sales manager to sell its products in Asia

3.As a graduate from university this year, you can probably get a job as _______.

A. a cost accountant in THYSSEN

B. a purchaser in THYSSEN

C. a secretary in NESTLE        　　

D. an accountant in NESTLE

高一英语阅读理解中等难度题查看答案及解析

English Around the World

There are more than 3,000 languages 1.（speak）in the world. Of all these languages, English is the most 2.(wide) used. Recent 3.(survey) show that more than 500 million people speak English as their mother tongue.

From its roots in England, the language was spread around the world 4.English traders and English governments in new lands. One of these new lands 5.(become) the United States of America. The population of the United States is 309 million, 6.(make) it the country with the 7.(large) number of native English speakers.

About 300 million people speak English as their second language. There are even more people, like some in Europe as well as in China and Japan, 8. study English as a foreign language.

English has become the base language for international business, for the world’s airlines and even for the Internet. Whatever language people speak, they need　 9.(know) some English if they work in these fields. 10. is clear that the English language is becoming more important.

高一英语完成句子中等难度题查看答案及解析