Farmers, especially in developing countries, are often criticized for cutting down forests. But a new study suggests that many farmers recognize the value of keeping trees.
Researchers using satellite images found at least ten percent tree cover on more than one billion hectares of farmland. That is almost half the farmland in the world. Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.
The study found the most tree cover in South America. Next comes Africa south of the Sahara, followed by Southeast Asia. North Africa and West Asia have the least.
The study found that climate conditions alone could not explain the amount of tree cover in different areas. Nor could the size of nearby populations, meaning people and trees can live together. There are areas with few trees but also few people, and areas with many trees and many people. The findings suggest that things like land rights, markets or government policies can influence tree planting and protection.
Dennis Garrity, who heads the World Agroforestry Center, says farmers are acting on their own to protect and plant trees. The problem, he says, is that policy makers and planners have been slow to recognize this and to support such efforts.
The satellite images may not show what the farmers are using the trees for, but trees provide nuts, fruit, wood and other products. They also help prevent soil loss and protect water supplies. Even under drought(干旱)conditions, trees can often provide food and a way to earn money until the next growing season.
Some trees act as natural fertilizers. They take nitrogen(氮气)out of the air and put it in the soil. Scientists at the Center say the use of fertilizer trees can re-duce the need for chemical nitrogen by up to three-fourths. Trees also capture carbon dioxide, a gas linked to climate change.
【小题1】Through the study, the researchers found that .
| A．there are more trees on farmlands than expected |
| B．fewer trees are being cut in developing countries |
| C．most farmers still don’t realize the value of trees |
| D．trees play a key role in preventing climate change |
| A．Southeast Asia | B．West Asia. |
| C．South America. | D．Africa south of the Sahara. |
| A．most farmers care about nothing but their own interests |
| B．there are usually few people living in areas with few trees |
| C．government plays a small role in tree planting and protection |
| D．government should support farmers in planting and protecting trees |
| A．how farmers plant trees |
| B．what products trees can bring |
| C．the importance of trees to farmers |
| D．the environmental value of tree cover |
【小题1】A
【小题2】B
【小题3】D
【小题4】C
解析试题分析：文章介绍现在世界上农场树林占有的面积还是很多的，农民正意识到树木对人对环境的重要性。
【小题1】细节理解题：从第二段的句子：Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.可知早先的估计树林面积是低的，不完整的，也就是现在的农场的树林比预料的要多。所以选A。
【小题2】细节题：题目问：下面的哪个地方树木面积最少？可以根据这几个地方定位到第三段：The study found the most tree cover in South America. Next comes Africa south of the Sahara, followed by Southeast Asia. North Africa and West Asia have the least. 可知West Asia是最少的。选B。
【小题3】细节题：题目问：Dennis Garrity是怎么认为的，根据Dennis Garrity定位到第五段：Dennis Garrity,….says farmers are acting on their own to protect and plant trees. The problem, he says, is that policy makers and planners have been slow to recognize this and to support such efforts.说明政府应该支持农民种树，保护树，所以选D。
【小题4】段落大意题：题目问：第六段主要讲了什么？重点放在第六段，从文章第六段的内容，可知讲的是树木对农民的重要性。
考点：考查环保类短文
科目：高中英语 来源： 题型：阅读理解
Different Kinds of Birds
Avocets
There are 4 different species of Avocet found around the world-Pied Avocet , Red-necked Avocet, Andean Avocet, and American Avocet. This bird is found in North and South America, Europe, and even Australia. This long-legged bird has webbed feet and an upturned, thin bill.
Bald Eagles
The bald eagle is found in wetlands and near coastlines. They have very large and broad wings, with a broad tail. The head and tail are white in color, which is the major distinguishable factor of the bald eagle. The long, hooked bill is yellow in color. They feed on fish, ducks, rabbits, geese, etc.
Eastern Bluebirds
These are around 61／2 inches in length .Such birds are found mainly in gardens woodlands, and orchards with the arrival of spring. Male Eastern Bluebirds are bright blue on the upper half and have a white belly. Female Eastern Bluebirds have a grayish head with shades of blue as well. New York and Missouri have named this creature as their state bird.
Flamingos
These pink-bodied birds with a unique beak, are generally found in large groups. The beaks are capable of removing mud before they can eat their food. Flamingos can be found in many African countries, areas of Florida, and one particular type of species is found only in the Andean highlands.
Kingfishers
There are over 90 various species of Kingfishers found in the woodland areas as well as wetlands across the world. They are excellent divers when it comes to catching fish in the rivers. Their pointed bills are what help them bag the catch. Kingfishers have good eyesight whether they are in air or underwater.
【小题1】____ most probably mean the same.
| A．Bill and beak | B．Head and beak | C．Bill and belly | D．Leg and feet |
| A．Eastern Bluebirds are all blue in color. |
| B．Avocets can be found around the world. |
| C．The white head and tail make Bald Eagles distinguishable. |
| D．More Kingfishers can be found in wetlands than in the woodland areas. |
| A．Bald Eagles |
| B．Female Eastern Bluebirds |
| C．Andean Avocets |
| D．one special type of Flamingos |
| A．habitats | B．shapes | C．ability to catch fish | D．eyesight in air or under water |
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科目：高中英语 来源： 题型：阅读理解
Researchers in the psychology department at the University of California at Los Angeles (UCLA) have discovered a major difference in the way men and women respond to stress. This difference may explain why men are more likely to suffer from stress-related disorders.
Until now, psychological research has maintained that both men and women have the same "fight-or-flight" reaction to stress. In other words, individuals either react with aggressive behavior, such as verbal or physical conflict ("fight"), or they react by withdrawing from the stressful situation ("flight"). However, the UCLA research team found that men and women have quite different biological and behavioral responses to stress. While men often react to stress in the fight-or-flight response, women often have another kind of reaction which could be called "tend and befriend." That is, they often react to stressful conditions by protecting and nurturing their young ("tend"), and by looking for social contact and support from others - especially other females ('befriend").
Scientists have long known that in the fight-or- flight reaction to stress, an important role is played by certain hormones(激素) released by the body. The UCLA research team suggests that the female tend-or-befriend response is also based on a hormone. This hormone, called oxytocin, has been studied in the context of childbirth, but now it is being studied for its role in the response of both men and women to stress. The principal investigator, Dr. Shelley E. Taylor, explained that "animals and people with high levels of oxytocin are calmer, more relaxed, more social, and less anxious." While men also secrete(分泌）oxytocin, its effects are reduced by male hormones.
In terms of everyday behavior, the UCLA study found that women are far more likely than men to seek social contact when they are feeling stressed. They may phone relatives or friends, or ask directions if they are lost.
The study also showed how fathers and mothers responded differently when they came home to their family after a stressful day at work. The typical father wanted to be left alone to enjoy some peace and quiet. For a typical mother, coping with a bad day at work meant focusing her attention on her children and their needs.
The differences in responding to stress may explain the fact that women have lower frequency of stress-related disorders such as high blood pressure or aggressive behavior. The tend-and-befriend regulatory(调节的) system may protect women against stress, and this may explain why women on average live longer than men.
【小题1】The UCLA study shows that in response to stress, men are more likely than women to _____ .
| A．turn to friends for help | B．solve a conflict calmly |
| C．find an escape from reality | D．seek comfort from children |
| A．Men have the same level of oxytocin as women do. |
| B．Oxytocin used to be studied in both men and women. |
| C．Both animals and people have high levels of oxytocin. |
| D．Oxytocin has more of an effect on women than on men. |
| A．Male hormones help build up the body's resistance to stress. |
| B．In a family a mother cares more about children than a father does. |
| C．Biological differences lead to different behavioral responses to stress. |
| D．The UCLA study was designed to confirm previous research findings. |
| A．How men and women get over stress |
| B．How men and women suffer from stress |
| C．How researchers overcome stress problems |
| D．How researchers handle stress-related disorders |
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科目：高中英语 来源： 题型：阅读理解
Can software bring dead tongues back to life? Probably yes.
A computer algorithm（计算程序）works almost as well as a trained linguist（语言学家） in reconstructing how dead "protolanguages" would have sounded, says a new study.
"Our computer system is doing a basic job right now," says Alex Bouchard-Côté, an assistant professor in the department of statistics at the University of British Columbia and lead author of the paper describing the algorithm. But the program does a good enough job that it may be able to give linguists a head start, the statistician added.
For centuries, scholars have reconstructed languages by hand: looking at the same word in two or more languages and making educated guesses about what that word's "ancestor" may have sounded like. For example, the Spanish word for man （"hombre"） and the French word for man （"homme"） developed from the Latin word "homo." The way linguists compare words from descendant（后代）languages to reconstruct the parent language is called, appropriately, the comparative method.
The early 19th-century linguist Franz Bopp was the first to compare Greek, Latin and Sanskrit using this method. Jacob Grimm, one of the Brothers Grimm of fairy tale fame, used the comparative method to show how Germanic languages developed from a common ancestor.
The difference between that and Bouchard-Côté's program, the statistician says, "is we do it on a larger scale." As a proof of concept, Bouchard-Côté fed words from 637 Austronesian languages （spoken in Indonesia, the Philippines, Malaysia and more） into the new algorithm, and the system came up with a list of what the ancestor words of all those languages would have sounded like. In more than 85 percent of cases, the automated reconstruction came within one character of the ancestor word commonly accepted as true by linguists.
The algorithm won't replace trained human linguists, but could speed up language analysis.
Using a computer to do large-scale reconstruction offers another advantage. Bouchard-Côté says, “With big data sets, you can really start finding regularities … You might find that certain sounds are more likely to change than others."
So Bouchard-Côté's team tested the "functional load hypothesis（假设）," which says that sounds that are more important for two clearly different words are less likely to change over time. A formal test of this hypothesis in 1967 looked at four languages; Bouchard-Côté's algorithm looked at 637.
"The revealed pattern would not be obvious if we had not been able to reconstruct large numbers of protolanguages," Bouchard-Côté and his coauthors write in the new study.
In addition to simply helping linguists understand how people spoke in the past, studying ancient languages can perhaps answer historical questions. For example, Bouchard-Côté says, "Say people are interested in finding out when Europe was settled. If you can figure out if the language of the settling population had a word for wheel, then you can get some idea of the order in which things occurred, because you would have some records that show you when the wheel was invented.”
【小题1】The underline word “protolanguages” in the first paragraph probably refers to __________.
| A．the languages that couldn’t be reconstructed by hand |
| B．parent languages that existed in the past |
| C．languages developed from a common ancestor |
| D．languages used to explain things that occurred in the past |
| A．is commonly accepted as false |
| B．dates back to the 19th century |
| C．focuses on European languages |
| D．is conducted using the comparative method |
| A．arouse people’s interest in when Europe was settled |
| B．allow us to find answers to some historical questions |
| C．enable us to picture the way linguists communicated |
| D．help figure out how the wheel was invented |
| A．will bring every dead language back to life |
| B．can take the place of linguists in language analysis |
| C．is of great help to promote language analysis with big data sets |
| D．can merely reconstruct Asian-Pacific “protolanguages” |
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科目：高中英语 来源： 题型：阅读理解
Pigs are always considered dirty animals because they roll in mud．But in fact they prefer being quite clean．They cover themselves with mud to help stay cool．During cooler weather, they prefer to stay clean．So do elephants, who also cover themselves in dust or mud to keep cool．When they find a place with clean water they will take a bath，using their long noses to give themselves—or each other—a nice shower
Some animals use dust to get clean．Chinchillas (南美洲栗鼠) have very fine fur． They don’t like to take water baths because water is not warm enough for them．So, instead, they roll around in fine dust．The dust helps to keep their fur and skin dry．This protects them from disease
Usually, a small bird is a light meal for a crocodile．But when a crocodile wants its teeth cleaned．it lies on the ground with its mouth open．The crocodile bird goes in and picks out any parasites(寄生虫)between the crocodile’s teeth or under its tongue．The crocodile gets its mouth cleaned，and the crocodile bird gets dinner．
You wouldn’t think fish would need baths．But some undersea parasites live under the fish’s skin．“Cleaner” fish，like the wrasse(隆头鱼)，help take them away．The wrasse stands on its head and dances to signal a big fish that it is ready to go into the cleaning business．The big fish will stop moving and open its mouth wide so the wrasse can swim inside and pick out parasites and bits of food．
【小题1】The passage is mainly about how animals __________．
| A．stay clean | B．help each other | C．get their food | D．take baths |
| A．They can help each other take baths． |
| B．They are dirtier during cooler weather． |
| C．They prefer taking baths to rolling in mud． |
| D．They like to stay cool and clean． |
| A．dust can dry their fur and skin | B．They are not good at swimming |
| C．Water is too cold for them | D．Dust is good for their health |
| A．Some animals can get clean from others’ help |
| B．Most animals are friendly to each other |
| C．Small animals couldn’t get food from big ones |
| D．All of the animals prefer to stay clean |
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科目：高中英语 来源： 题型：阅读理解
Many of our favorite travel destinations are in danger of being changed badly by increased temperatures and rising seas. The following are some of the places that may be in danger and some that are already experiencing the effects of global warming.
The Everglades, Florida: Perhaps no region of the country is as unprotected to climate change as Florida. Even a slight increase in temperature and water level could devastate popular destinations like the Everglades, Miami Beach and the Keys.
Australia’s Great Barrier Reef: One of the most impressive natural habitats in the world, the Great Barrier Reef could be killed by increased water temperatures and the resulting coral bleaching (漂白法). Australia is particularly easily damaged by global warming because of its large number of fragile (脆弱的) ecosystems, uncertain water sources and a large group of people gathering on the coast.
Dalian, China: Fast-growing China, shown here during a heat wave last year, is opening about one coal factory every day this year. Along with the U.S., China is one of the world's leading contributors to the greenhouse gases , which can lead to the increase in the Earth's temperature.
Venice, Italy: No stranger to flooding, Venice has invested $4.5 billion in a floodgate system that is due to open in 2012. But the frequent changing ocean levels have made people question the floodgates' ability to hold out the rising waters.
London, England: Designed to protect London from storms and extremely high tides, the Thames Barrier was opened in 1984. Some analysts fear that rising oceans will create conditions beyond the capabilities the barrier was designed to meet.
【小题1】The word “devastate” in paragraph 2 means “_____________”.
| A．protect | B．destroy | C．swallow | D．enlarge |
| A．Fragile ecosystem |
| B．Uncertain water sources. |
| C．The large group of people. |
| D．Increased water temperatures and the coral bleaching |
| A．flooding is common in Venice |
| B．everyone is familiar with flooding |
| C．it is strange for Venice to experience flooding |
| D．there is no flooding in Venice |
| A．the dangerous destinations |
| B．the most popular destinations |
| C．the fascinating destinations |
| D．the endangered destinations |
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科目：高中英语 来源： 题型：阅读理解
“iPhone 5”, the tallest thing to happen to iPhone since iPhone
We don’t want to change your phone, we want to make you say, “Wow, that is a bigger change than I expected”. “iPhone 5” is a result of that desire to surprise.
It’s been completely redesigned. For the first time ever, we’ve increased the size of display (显示) by making the screen taller but not wider.
You can see more of your content without the need to scroll. We are making scrolling the thing of the past. It is more comfortable to use and reduces tiredness from scrolling when you read long documents.
Even with the larger display, it is the thinnest iPhone we ever built. To achieve the design this tall, we have to look at it and completely redesign the architecture inside. It’s 18% thinner and 79.5% taller than the previous iPhone. It makes everything you do on “iPhone5” easier. No more hidden menus, no confusing gestures. Everything is right at your fingertips.
The panorama feature (全景拍照) is simply awesome. The ultra HD (超高清) widescreen display lets you get your entire shot in a single snap (快门). You can also use its creative design for picture stabilization.
With an iPhone this tall, reception of signals has never been better. And of course, all your favorite applications are still available. In fact you will find your old favorites also benefit from the new experiencing handsome ultra HD widescreen. We found while many previous iPhone owners were using Facetime, they only used it for the faces. That’s why we are introducing Bodytime. With its ultra HD widescreen display, Bodytime lets you see a person’s entire body.
It took all of our learning and all of our thinking to realize something so simple, so clear, and yet so tall.
And I wish your pocket were tall enough to hold such a perfect invention!
【小题1】How is the screen of “iPhone 5” different from the previous ones?
| A．Wider. | B．Taller. | C．Easier. | D．Thinner. |
| A．Update the webpage. | B．Download new documents. |
| C．Refresh the content. | D．Move the content upward. |
| A．It is really necessary for you to hide menus. |
| B．The reception of signals is bad due to its length. |
| C．Bodytime is popular with previous iPhone owners. |
| D．New applications of “iPhone 5” are unbelievable. |
| A．humorous | B．objective | C．scientific | D．serious |
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科目：高中英语 来源： 题型：阅读理解
What’s the greenest place in America? If you answered something like the warm sunlight of Santa Barbara, you’d be wrong. The greenest place in America has almost no sign of nature— the buildings outnumber the trees— and the air isn’t all that great. What it has is density(密度)and efficiency— the twin qualities that finally define green in the global warming time. Applying those standards，the greenest place in America is New York City— particularly，the overcrowded，overpriced island of Manhattan, which produces 30％ less per-capita(人均)greenhouse gas than that of the nation．
It’s that density that makes Manhattan so green. Manhattan’s population density is 800 times the national average. Density comes with negatives，certainly— small living spaces，air pollution— but it also enables amazing efficiencies．Over 80％ of Manhattanites travel to work by public transport, by bike or on foot— compared to an average of about 8％ everywhere else in the country. Manhattan’s apartment buildings are far more energy-efficient than the houses in the suburbs.
What’s true of New York City is more or less true of other American urban areas, which explains why a growing part of the environmental movement now focuses on greening cities, hoping to attract more Americans back downtown. There’s an effort to make cities more sustainable(可持续的)，by improving public transport，reducing air pollution and upgrading energy efficiency. But even more important, it is quite urgent to change decades of government policies that have been in favor of the suburbs，with disastrous consequences for energy，the environment and the climate.
That’s exactly the difficult point. For all the high efficiency and convenience and richness of living in a city，there are disadvantages too．New York，for example，has some of the highest childhood asthma(哮喘)rates in the U.S.
So it’s welcome news that New York has continued to push its P1aNYC scheme, a long-term program to make the city greener and more sustainable over the next decades. Recently it announced an update to the plan that includes phasing out heavy heating oils in New York City apartment buildings by 2030，to be replaced with cleaner natural gas.
【小题1】Manhattan is considered as the greenest place in America because of its__________
| A．buildings and trees | B．density and efficiency |
| C．sunlight and nature | D．transport and population |
| A．New Yorkers have urged the city government to carry out green policies |
| B．the public transport and living space are quite satisfactory in New York |
| C．life in the countryside is more comfortable and energy efficient than that in cities |
| D．the significance of making cities greener is gained in promoting energy efficiency |
| A．New York city | B．PlaNYC scheme |
| C．Manhattan | D．Santa Barbara |
| A．rapidly promoting dealing with |
| B．widely suggesting researching on |
| C．gradually stopping using |
| D．immediately forbidding producing |
| A．Manhattan the Greenest Place in America? |
| B．The Higher Density，the Greener City? |
| C．PlaNYC Scheme：New York City’s Future |
| D．Living in Cities Does Good to the Environment |
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科目：高中英语 来源： 题型：阅读理解
Scientists discovered 163 new species in Southeast Asia’s Greater Mekong region last year，but all are at risk of extinction due to climate change，the WWF said in a report released Friday.
The newly discovered creatures include a birdeating frog with fangs (毒牙)，a bird that would rather walk than fly and a gecko (壁虎) whose alien appearance inspired the report’s title of “Close Encounters”，the conservation group said.
The report was released ahead of major UN talks on climate change in Bangkok next week，which are being held before a makeorbreak summit in Copenhagen this December.
“Some species will be able to adapt to climate change，and many will not，potentially resulting in massive extinction，” Stuart Chapman，director of the WWF Greater Mekong program，said in the report.“Rare and endangered species like those newly discovered are especially vulnerable (易受伤害的) because climate change will further shrink their already restricted habitats，” he said.
“The new discoveries in 2010 include 100 plants,28 fish,18 reptiles,14 amphibians,2 mammals and a bird，”the WWF report said.The area spans Cambodia，Laos，Myanmar，Thailand，Vietnam and China’s Yunnan Province.
“Among the new species is the birdeating fanged frog，which remains hidden in a protected area of Thailand despite the fact that scientists are studying there for 40 years，” the report said.
The tigerstriped pit viper was discovered accidentally on an island off the coast of Vietnam when a scientist was looking for a lizard and his son pointed out that his hand was on a rock right next to the snake’s fangs.“We caught the snake and the gecko and they both proved to be new species，” researcher Lee Grismer of La Sierra University in California was quoted as saying in the report.The leopard gecko，found on another Vietnamese island，has the coloring of a leopard and bizarre orange，catlike eyes and thin legs.
The Greater Mekong region has proved a rich area for scientists.The WWF said in December 2010 that it had found 1,068 new species there between 1997 and 2009.
【小题1】What is special about the newly discovered bird?
| A．It usually walks. |
| B．It likes walking and flying. |
| C．It can eat other birds. |
| D．It can eat frogs. |
| A．most of the newly discovered species can adapt to climate change |
| B．climate change can cause massive extinction of the newly discovered species |
| C．the newly discovered species are not so vulnerable to climate change |
| D．many species have already died out because of climate change |
| A．frightened | B．disappointed |
| C．excited | D．puzzled |
| A．The Greater Mekong region is a rich area for scientists. |
| B．Many rare species remain to be discovered in the Mekong region. |
| C．Scientists have discovered many new species in the Mekong region. |
| D．Climate change threatens Mekong new species. |
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