When an ant dies, other ants take it out of the nest, often within an hour after its death. This behavior interests scientists and they wonder how ants know for sure—and so soon—that another ant is dead.
One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist, a scientist who studies animals and plants. He found that ants have a chemical on the outside of their bodies that signals to other ants, “I'm dead—take me away” when it is dead.
But there's a question to answer: As we know, if an ant is dead, it stops moving. But when an ant is sleeping or knocked unconscious, it is also not moving. However, other ants don't move the living ant out of the nest. How do they know this ant is not dead? Choe found that ants have another chemical on their bodies, which tells nearby ants something like, “Wait—I'm not dead yet” when it is not dead. Choe suspects that when an ant dies, the chemical that says, “Wait— I'm not dead yet” quickly goes away. When other ants detect the “dead” chemical without the “not dead yet” chemical, they move away the body.
To test his theory, Choe and his team put different chemicals on ants. When the scientists used the “I'm dead” chemical, other ants quickly moved the treated ant away. When the scientists used the “Wait—I'm not dead yet” chemical, other ants left the treated ant alone. Choe believes this behavior shows that the “not dead yet” chemical overrides the “dead” chemical when picked up by other ants. And that when an ant dies, the “not dead yet” chemical dies away. Other nearby ants then notice the remaining “dead” chemical and remove the body from the nest.
Understanding this behavior can help scientists figure out how to stop ants from invading new places and causing problems.
【小题1】What is the function of the first paragraph?
| A．Leading the following paragraphs. |
| B．Showing the main idea of the passage. |
| C．Introducing the background of the passage. |
| D．Giving a summary of the passage. |
| A．is weaker than | B．is stronger than | C．is better than | D．is worse than |
| A．Living ants can also be taken away when they are not moving. |
| B．When an ant dies, it can tell others using a certain chemical. |
| C．A living ant can pretend to be dead using a special chemical. |
| D．Ants often use chemicals to communicate with each other. |
【小题1】A
【小题2】B
【小题3】B
解析试题分析：本文告诉我们为什么蚂蚁在死亡以后很快就被同伴抬出来的原因。原来是死亡的蚂蚁会发出一种化学物质告诉同伴它已经死亡。
【小题1】A 推理题。作者在第一段里叙述了一个奇怪的现象，当蚂蚁死亡以后，很快就会被同伴抬出来。为什么会如此呢？用这个问题引起了下文。故A正确。
【小题2】B 推理题。根据When the scientists used the “Wait—I'm not dead yet” chemical, other ants left the treated ant alone. Choe believes this behavior shows that the “not dead yet” chemical overrides the “dead” chemical when picked up by other ants.可知当科学家使用“Wait—I'm not dead yet”的时候，其他的蚂蚁蚂蚁把这些蚂蚁抬走，是因为它们身上的“Wait—I'm not dead yet”的化学物质要比“dead”的化学物质味道更为强烈。故B正确。
【小题3】B 细节题。根据文章第二段He found that ants have a chemical on the outside of their bodies that signals to other ants, “I'm dead—take me away” when it is dead.可知当蚂蚁死亡的时候，会发出一种化学物质告诉别的蚂蚁它已经死了。故B正确。
考点：考察科普类短文阅读
科目：高中英语 来源： 题型：阅读理解
Animals are considered to be endangered if the species is close to extinction throughout all or most of its environment. Animals become endangered for a variety of reasons.
Some animals become endangered when their habitats contain resources for humans. For example, commercial forest cutting in the Amazon Rainforest has seriously reduced the population of many animal species and lead to the extinction of other groups. Land itself is an important resource to humans since it provides us with living space, and when people replace animal habitats with human habitats, it can lead to larger loss of natural species.
Commercial and industrial operations may reduce land or water for animals and pollute their environment. Due to water pollution, the baiji, a fresh water dolphin native to China, was declared extinct, meaning it’s unlikely the population can recover. Even noise pollution from human activities can lead to the disorder of animal behavior.
Another cause that makes animals become endangered is over-fishing or over-hunting. Over-hunting whales led to near extinction of many species of whales.
The introduction of a non-native species to a habitat may make animals become endangered. The native species may not defend against a new one, and the effects can be dangerous. In Australia, the introduction of the common house cat led to the extinction of the red-fronted parakeet and has seriously damaged the populations of several small animals.
Introduced species can also bring new diseases with them. As a result, animals become endangered. Native animals may not have the power to fight against non-native diseases, and population levels can suffer. Another cause of disease is human-introduced chemicals. The use of DDT is believed to be one of the leading causes in driving the California Condor to near extinction.
When animals become endangered, the entire food chain can be affected. For example, in 2008 disease seriously harmed the honeybee, which is largely responsible for pollinating(授花粉) plants, including many fruits and vegetables. Without their pollination, a very large part of the human diet could be reduced. In fact, if the honeybee should become extinct, our life would be affected and billions of dollars would be lost. Therefore, many people argue that when animals become endangered it is in man’s own self-interest to protect them.
【小题1】The passage is mainly about ______.
| A．ways of protecting animals’ habitats |
| B．effects caused by species endangerment |
| C．dangers of bringing in non-native species |
| D．reasons why animals become endangered |
| A．The extinction of the whales. |
| B．The extinction of the red-fronted parakeet. |
| C．The decreasing population of the dolphin. |
| D．The effect of the honeybee on the human diet. |
| A．Native species are likely to die from the new diseases. |
| B．It’s hard for non-native species to survive. |
| C．Non-native species will take up more space. |
| D．Native species are so powerful for non-native species. |
| A．loss of habitat | B．harmful chemicals |
| C．forest cutting | D．unfamiliar diseases |
| A．humans are to blame for species extinction |
| B．small animals mean little to the whole food chain |
| C．protection of the honeybee has cost billions of dollars |
| D．humans protect animals for the benefit of themselves |
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科目：高中英语 来源： 题型：阅读理解
Modern inventions have speeded up people's lives amazingly. Motor cars cover a hundred miles in light more than an hour, aircraft cross the world inside a day, while computers operate at lightning speed. Indeed, this love of speed seems never ending. Every year motor cars are produced which go even faster and each new computer boasts(吹嘘) of saving precious seconds in handling tasks.
All this saves time, but at a price.When we lose or gain half a day in speeding across the world in an airplane, our bodies tell us so. We get the uncomfortable feeling known as jet lag；our bodies feel that they have been left behind in another time zone. Again, spending too long at computers results in painful wrists and fingers. Mobile phones also , according to some scientists；too much use may put harmful radiation into our brains, a consequence we do not like to think about.
However, what do we do with the time we have saved? Certainly not relax, or so it seems. We are so accustomed to constant activity that we find it difficult to sit and do nothing or even just one thing at a time. Perhaps the days are long gone when we might listen quietly to a story on the radio, letting imagination take us into another world.
There was a time when some people's lives were devoted simply to the cultivation(耕耘) of the land or the care of cattle. No multi tasking there；their lives went on at a much gentler pace, and in a familiar pattern. There is much that we might envy about a way of life like this. Yet before we do so, we must think of the hard tasks our ancestors faced: they farmed with bare hands, often lived close to hunger, and had to make tools from wood and stone. Modern machinery has freed people from that primitive existence.
【小题1】What's the passage mainly about?(within 10 words)
【小题2】List the difficulties our ancestors met according to the text.(within 15 words)
①
②
③
【小题3】Fill in the blank in the 2nd paragraph with proper words or phrases.
【小题4】Why do we make new products more and more time-saving according to Paragraph 1 of this passage?
【小题5】Translate the underlined sentence in the 3rd paragraph into Chinese.
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科目：高中英语 来源： 题型：阅读理解
Every time you go to the supermarket you come away with your purchases packed in plastic bags. But wouldn’t it be kinder to the environment if you asked for paper bags instead?
The answer is not as easy as it might seem. Environmentalists say there are drawbacks to using both plastic bags and paper bags.
80 percent of groceries in the US are packed in plastic bags and the numbers are becoming huge. Consumers use between 500 billion and 1 trillion plastic bags per year worldwide.
Some experts believe that all these bags harm the environment. Plastic takes hundreds of years to break down and, as it does so, poisonous materials are released into the water and soil.
Further damage is caused if plastic bags enter the sea. For example, endangered sea turtles cannot tell the bags from jellyfish, their main source of food, and often choke on them.
However, this kind of bag does have its advantages.
Paper bags use more energy and create more waste than plastic bags. Plastic bags require 40 percent less energy to produce and cause 70 percent less air pollution. They also release as much as 94 percent less waste into the water than paper ones do.
But paper bags do break down more quickly than plastic bags. They don’t endanger wildlife, either.
So what should we do? One possible solution would be to use biodegradable plastic bags. “Biodegradable” means that the bags break down naturally just like a piece of banana peel when it is left outside.
But until biodegradable technology improves, it might be easier to pack things you buy in reusable cloth bags.
【小题1】Compared to paper bags, plastic bags ______.
| A．produce 6 percent more waste |
| B．can be made biodegradable more easily |
| C．can be used as a source of food |
| D．save 40 percent of the energy |
| A．Paper bags | B．Plastic bags |
| C．Biodegradable plastic bags. | D．Cloth bags. |
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科目：高中英语 来源： 题型：阅读理解
Imagine going to sleep then waking up speaking another language. It may sound impossible， but it's actually happened.
The phenomenon(现象)of being able to suddenly speak another language is known as“Xenoglossia”， from the Greek words“xenos”(foreigner)and “glossa”(language)．
It once happened to a 13yearold girl from Croatia. After being unconscious(不省人事的)because of a disease for 24 hours in 2010，she woke up speaking fluent German. The girl， who came from the town of Knin in the south of Croatia，was studying German at school but she'd only started recently. Her parents said that she'd been reading German books and watching German TV at home， but that she wasn't fluent in the language.However ，since waking up， she's been able to communicate “perfectly”in German.What's really strange is that she's now unable to speak Croat，her mother language.Doctors at Split's KB Hospital have asked some experts to examine the girl as they try to find out what caused the change.Dr Mijo Milas said，“In earlier times this would have been considered as a miracle(奇迹)；we prefer to think that there must be an explanation—it's just that we haven't found it yet.”
In 2007，Matej Kus from Czech became unconscious after a motorbike accident. On waking up 45 minutes later，he could speak fluent English.Matej was only 18 years old at the time， and had just started studying the language and so was at a low level.Peter Waite，Kus's teammate said，“I couldn't believe what I was hearing.It was really clear English.It was unbelievable to hear him talk in unbroken English.”Unluckily，Matej's new language skills didn't last.Two days later， when he recovered fully from the accident， he'd completely forgotten his English.
We still don't know exactly what happened to the two people. Perhaps scientists will discover something new and exciting. But until then， keep studying!
【小题1】According to the passage，what is“Xenoglossia”？
| A．That someone becomes unconscious. |
| B．That someone speaks a new language in a sudden. |
| C．That someone doesn't like his mother language. |
| D．That someone is able to speak Greek suddenly. |
| A．Having accidents. |
| B．Speaking fluent German. |
| C．The phenomenon of Xenoglossia. |
| D．Being unable to speak. |
| A．wanted to know what caused her change |
| B．believed she had a talent for language |
| C．didn't study German for a long time |
| D．didn't like learning German |
| A．Matej Kus is now afraid of motorbike racing. |
| B．The girl from Croatia lost consciousness for several days. |
| C．The girl from Croatia was knocked unconscious in an accident. |
| D．Matej Kus could only speak a little English before the accident . |
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科目：高中英语 来源： 题型：阅读理解
Many animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food. You may like it because it smells good or because it tastes good. You may dislike some types of food because they do not look, smell or taste very nice. Different animals use different sense, to find and choose their food. A few animals depend on only one of their senses. while most animals use more than one sense.
Although there are many different types of food, some animals spend their lives eating only one type. The giant panda (大熊猫) eats only one particular type of bamboo (竹子). Other animals eat only one type of food even when given the choice. A kind of white butterfly (蝴蝶) will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet (多样化饮食). The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.
Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad for the health, Choosing the right food, therefore, has become an area of study in modern life.
【小题1】We can infer from the text that humans and animals - —.
| A．depend on one sense in choosing food |
| B．are not satisfied with their food |
| C．eat entirely different food |
| D．choose food in similar ways |
| A．The small bird. | B．The bear. | C．The fox. | D．The white butterfly. |
| A．the food color changes |
| B．the season changes |
| C．they move to different places |
| D．they are attracted by different smells |
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科目：高中英语 来源： 题型：阅读理解
American researchers found females are the more talkative sex because of a special “language protein(蛋白质)” in the brain.
The study, conducted by neuroscientists （神经学家）and psychologist from the University of Maryland, concluded that women talked more because they had more of the Foxp2 protein. The research, published in the Journal of Neuroscience, found that higher levels were found among humans that were women but in rats that were males. Their findings came after it was previously claimed that ladies speak about 20,000 words a day – over 13,000 more than men. “This study is one of the first to report a sex difference in the expression of a language-associated protein in humans or animals,” said Prof Margaret McCarthy, who led the study. In their study, the researchers attempted to determine what might make male rats more vocal than their female friends.
They separated four-day-old rats from their mothers and then counted the number of times they cried out in the “ultrasonic range”, the frequencies higher than humans can hear, over five minutes. While both sexes called out hundreds of cries, the males called out twice as often, they found. But when the pups were returned to their mother’s cage, she fussed over her sons first. Tests conducted on the parts of the brain known to be associated with vocalcalls showed the male pups have up to twice as much Foxp2 protein as the females. The researchers then increased the production in the brains of female pups and reduced it in males. This led to the female rats crying out more often and their mothers showing more interest to them. In contrast, males became less “talkative”.
The researchers then tested samples from ten children, aged between three and five, which showed that females had up to 30 per cent more of the Foxp2 protein than males, in a brain area key to language in humans.
“Based on our observations, we assume higher levels of Foxp2 in girls and higher levels of Foxp2 in male rats is an indication that Foxp2 protein levels are associated with the more communicative sex,” said Prof McCarthy.
“Our results imply Foxp2 as a component of the neurobiological basis of sex differences in vocal communication in mammals. ”
【小题1】From the second paragraph, we can learn that ________.
| A．women always speak more words than men |
| B．men and male rats have low levels of language protein |
| C．women and male rats have similar levels of Foxp2 |
| D．McCarthy isn’t the first to find females more talkative |
| A．paid attention to | B．related to | C．put pressure on | D．counted on |
| A．test which part of the brain is key to language in rats and humans |
| B．prove the levels of Foxp2 protein in humans and rats are different |
| C．determine the reason why female rats are more talkative than male rats |
| D．discover the association between Foxp2protein and vocal communication |
| A．Tests on humans and rats |
| B．Why women are the talkative sex |
| C．Sex differences in Foxp2 protein |
| D．Foxp2 protein determines oral ability |
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科目：高中英语 来源： 题型：阅读理解
Have you ever wondered why birds sing? Maybe you thought that they were just happy．After all, you probably sing when you are happy．
Some scientists believe that birds do sing some of the time just because they are happy．However they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory．
Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own．Only he and his family are welcome there． No other families of the same species are welcome．Your house is your territory where only your family and friends are welcome．If a stranger should enter your territory and threaten you, you might shout．Probably this would be enough to frighten him away．
If so, you have actually frightened the stranger away without having to fight him．A bird does the same thing．But he expects an outsider almost any time, especially at nesting (筑巢) season．So he is screaming all the time, whether he can see an outsider or not．This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away．
【小题1】Some scientists believe that most of the time bird’s singing is actually ______．
| A．an expression of happiness | B．a way of warning |
| C．an expression of anger | D．a way of greeting |
| A．A place where families of other species are not accepted. |
| B．A place where a bird may shout at the top of its voice． |
| C．An area for which birds fight against each other． |
| D．An area which a bird considers to be its own． |
| A．Because they want to invite more friends． |
| B．Because their singing helps frighten outsiders away． |
| C．Because they want to find outsiders around． |
| D．Because their singing helps get rid of their fears． |
| A．By comparing birds with human beings． |
| B．By reporting experiment results． |
| C．By describing birds’ daily life． |
| D．By telling a bird’s story． |
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科目：高中英语 来源： 题型：阅读理解
This winter, the air quality over the north China plain was so bad that it was actually off the standard scale. The air pollution reached levels that the World Health Organization describes as dangerous. On Thursday, heavy smog blanketed most of northern and eastern China again.
It is reasonable to ask why the air pollution is so bad this winter. Weather conditions and topographic(地形学的) factors have been given as reasons, but, although contributing factors, these are not to blame. The worsening air pollution is linked to an energy mix that relies heavily on coal and to motor vehicle emissions(排放). But despite the astonishing growth of motor vehicles in our cities, it is the burning of coal that is the biggest cause of air pollution. More than half of the country's power plants are located in the eastern region and China's coal consumption has more than doubled in the past decade, reaching 3.8 billion tons last year, accounting for almost half the world's total coal consumption. And with coal occupying nearly 70 percent of the country's primary energy consumption, it has become critical to reduce the use of coal if we are to solve the nation's overall air pollution problem.
In the face of the poisonous air recently, one citizen said, "we have nothing but hot air to purify the skies". In fact, the government plans to have 350 billion yuan ($55.67 billion) investment in improving coal-fired facilities and limiting the use of yellow-label cars that do not meet the Euro I emissions standard and so on.
However, it would be far more effective to reduce emissions at the source, which means that the biggest challenge currently facing government departments is saying "no" to the country's air polluting offenders. According to the Joint Prevention and Control Plan on Air Pollution in Key Regions released recently by the State Council, the amount of coal the nation consumes is set to rise by 30 percent during the period of the 12th Five-Year Plan. This is not going to let anyone breathe easier.
This highlights a key problem when it comes to environmental issues in this country - economic development comes first. The fundamental cause of the worsening air pollution is the idea of economic growth at any cost, which has resulted in ever-worsening pollution. And the priority(优先权)given to economic growth presents another problem, namely the failure of existing environmental protection policies and regulations to control pollution. For instance, the current weak regulations covering emissions would suggest there has been a significant reduction in emissions when clearly this is not the case. Also those enterprises found breaking the regulations are still far lower than the cost of treating the pollution they produce. This means even if many large-scale enterprises with lagging production capacity(能力) fail to meet the requirements for environmental protection, the environmental protection department is incapable of shutting these enterprises down or forcing their relocation.
Dealing with air pollution requires taking action at the local level to reduce vehicle emissions and at the regional level to reduce industrial emissions. But it also requires giving more priority to environmental issues in policymaking. Our hope is that the environmental protection department will be truly capable of saying "no" to pollution, and it will raise standards and effectively enforce them, and that governments at all levels will prioritize quality of life not just economic growth.
【小题1】The writer mentions the heavy smog in parts of China in Paragraph1 in order to_____.
| A．remind people to stay in doors because of the bad air quality |
| B．show people’s concern about the priority to economic growth |
| C．introduce the issue about the serious air pollution |
| D．highlight the importance of government’s policies and regulations |
| A．Because enterprises are encouraged to develop economy at the cost of the environment. |
| B．Because much emphasis has been laid on economic growth regardless of the cost. |
| C．Because it’s impossible to relocate the enterprises for lack of money. |
| D．Because the production capacity of enterprises falls behind the required speed. |
| A．the sharp growth of coal consumption in recent years |
| B．the rapid increase of motor vehicles in cities |
| C．the building of power plants in northern China |
| D．the poor weather conditions caused by complex geographical factors |
| A．Giving priority to economic development in policymaking. |
| B．Making environment-friendly policies and carrying them out effectively. |
| C．Increasing investment in the construction of coal-fired facilities. |
| D．Limiting the use of cars not meeting the required emission standard |
| A．Pessimistic. | B．Convincing. | C．Doubtful. | D．Concerned. |
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