Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably，mosquitoes can do more than cause an itchy(发痒的）wound. Some mosquitoes spread several serious diseases，including Dengue，yellow fever and malaria.
Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.
Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas，which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.
But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects，with even smaller brains，use three senses to find a blood meal.
Michael Dickinson’s team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel. They then used cameras to record the mosquitoes. The insects followed the plume.
Then，the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr. Dickinson said，at first，the mosquitoes showed no interest in the objects at all. “What was quite striking and quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO2. they change their behavior quite obviously and now would become attracted to these little visual blobs (斑点).”
This suggested to the researchers that a mosquito’s sense of smell is more important in the search for food. Once mosquitoes catch a smell of a human or animal, they also follow visual signals.
1.What do mosquitoes mainly use to find their targets?
A. Sense of smell. B. Sense of touch.
C. Sense of sight. D. Smart brains.
2.The first response of the mosquitoes to the objects in the experiment is .
A. to fly to the dark ones
B. to catch and stick to them
C. to take no notice of them
D. to attach themselves to them
3.How can we avoid being attacked by mosquitoes according to the text?
A. Don’t let them see us.
B. Use dark objects to stop them.
C. Make them fly back and forth for hours.
D. Attract them to objects full of carbon dioxide gas.
4.What can be the best title for the text?
A. How Do Mosquitoes Survive?
B. Why Do Mosquitoes Need Blood?
C. How Do Mosquitoes Choose to Bite You?
D. Why Do Mosquitoes Attack the Human Being?
高三英语阅读理解中等难度题
Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably，mosquitoes can do more than cause an itchy(发痒的）wound. Some mosquitoes spread several serious diseases，including Dengue，yellow fever and malaria.
Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.
Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas，which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.
But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects，with even smaller brains，use three senses to find a blood meal.
Michael Dickinson’s team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel. They then used cameras to record the mosquitoes. The insects followed the plume.
Then，the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr. Dickinson said，at first，the mosquitoes showed no interest in the objects at all. “What was quite striking and quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO2. they change their behavior quite obviously and now would become attracted to these little visual blobs (斑点).”
This suggested to the researchers that a mosquito’s sense of smell is more important in the search for food. Once mosquitoes catch a smell of a human or animal, they also follow visual signals.
1.What do mosquitoes mainly use to find their targets?
A. Sense of smell. B. Sense of touch.
C. Sense of sight. D. Smart brains.
2.The first response of the mosquitoes to the objects in the experiment is .
A. to fly to the dark ones
B. to catch and stick to them
C. to take no notice of them
D. to attach themselves to them
3.How can we avoid being attacked by mosquitoes according to the text?
A. Don’t let them see us.
B. Use dark objects to stop them.
C. Make them fly back and forth for hours.
D. Attract them to objects full of carbon dioxide gas.
4.What can be the best title for the text?
A. How Do Mosquitoes Survive?
B. Why Do Mosquitoes Need Blood?
C. How Do Mosquitoes Choose to Bite You?
D. Why Do Mosquitoes Attack the Human Being?
高三英语阅读理解中等难度题查看答案及解析
Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably，mosquitoes can do more than cause an itchy(发痒的）wound. Some mosquitoes spread several serious diseases，including Dengue，yellow fever and malaria.
Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.
Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas，which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.
But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects，with even smaller brains，use three senses to find a blood meal.
Michael Dickinson’s team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel. They then used cameras to record the mosquitoes. The insects followed the plume.
Then，the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr. Dickinson said，at first，the mosquitoes showed no interest in the objects at all. “What was quite striking and quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO2，they change their behavior quite obviously and now would become attracted to these little visual blobs (斑点）.”
This suggested to the researchers that a mosquito’s sense of smell is more important in the search for food. Once mosquitoes catch a smell of a human or animal，they also follow visual signals.
1.What do mosquitoes mainly use to find their targets?
A. Sense of smell. B. Sense of touch.
C. Sense of sight. D. Smart brains.
2.The first response of the mosquitoes to the objects in the experiment is .
A. to fly to the dark ones
B. to catch and stick to them
C. to take no notice of them
D. to attach themselves to them
3.How can we avoid being attacked by mosquitoes according to the text ?
A. Don’t let them see us.
B. Use dark objects to stop them.
C. Make them fly back and forth for hours.
D. Attract them to objects full of carbon dioxide gas.
4. What can be the best title for the text?
A. How Do Mosquitoes Survive?
B. Why Do Mosquitoes Need Blood?
C. How Do Mosquitoes Choose to Bite You?
D. Why Do Mosquitoes Attack the Human Being?
高三英语阅读理解中等难度题查看答案及解析
Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably, mosquitoes can do more than cause an itchy(发痒的）wound. Some mosquitoes spread several serious diseases，including Dengue，yellow fever and malaria.
Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.
Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas, which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.
But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects, with even smaller brains，use three senses to find a blood meal.
Michael Dickinson’s team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel. They then used cameras to record the mosquitoes. The insects followed the plume.
Then, the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr. Dickinson said, at first, the mosquitoes showed no interest in the objects at all. “What was quite striking and quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO2, they change their behavior quite obviously and now would become attracted to these little visual blobs (斑点）.”
This suggested to the researchers that a mosquito’s sense of smell is more important in the search for food. Once mosquitoes catch a smell of a human or animal，they also follow visual signals.
1.What do mosquitoes mainly use to find their targets?
A. Sense of smell B. Sense of touch
C. Sense of sight D. Smart brains
2.The first response of the mosquitoes to the objects in the experiment is _______.
A. to fly to the dark ones
B. to catch and stick to them
C. to take no notice of them
D. to attach themselves to them
3.How can we avoid being attacked by mosquitoes according to the text?
A. Don’t let them see us.
B. Use dark objects to stop them.
C. Make them fly back and forth for hours.
D. Attract them to objects full of carbon dioxide gas.
4.What can be the best title for the text?
A. How Do Mosquitoes Survive?
B. Why Do Mosquitoes Need Blood?
C. How Do Mosquitoes Choose to Bite You?
D. Why Do Mosquitoes Attack the Human Being?
高三英语阅读理解中等难度题查看答案及解析
Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably，mosquitoes can do more than cause an itchy(发痒的）wound. Some mosquitoes spread several serious diseases，including Dengue， yellow fever and malaria.
Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.
Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas，which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.
But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects，with even smaller brains，use three senses to find a blood meal.
Michael Dickinson’s team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel. They then used cameras to record the mosquitoes. The insects followed the plume.
Then，the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr Dickinson said，at first，the mosquitoes showed no interest in the objects at all.
“What was quite striking and quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO2，they change their behavior quite obvi ously and now would become attracted to these little visual blobs (斑点）.”
This suggested to the researchers that a mosquito’s sense of smell is more important in the search for food. Once mosquitoes catch a smell of a human or animal，they also follow visual signals.
1.What do mosquitoes mainly use to find their targets?
A. Sense of smell. B. Sense of touch.
C. Sense of sight. D. Smart brains.
2.The first response of the mosquitoes to the objects in the experiment is .
A. to fly to the dark ones
B. to catch and stick to them
C. to take no notice of them
D. to attach themselves to them
3.How can we avoid being attacked by mosqu itoes according to the text ?
A. Don’t let them see us.
B. Use dark objects to stop them.
C. Make them fly back and forth for hours.
D. Attract them to objects full of carbon dioxide gas.
4.What can be the best title for the text?
A. How Do Mosquitoes Survive?
B. Why Do Mosquitoes Need Blood?
C. How Do Mosquitoes Choose to Bite You?
D. Why Do Mosquitoes Attack the Human Being?
高三英语阅读理解中等难度题查看答案及解析
We have realized ________ she is expecting is just an opportunity to test her ability.
A．that B．which
C．what D．where
高三英语单项填空中等难度题查看答案及解析
Number sense is not the ability to count. It is the ability to recognize a 1 in number. Human beings are born with this ability. 2 , experiments show that many animals are, too. For example, many birds have good number sense. If a nest has four eggs and you remove one, the bird will not 3.However, if you remove two, the bird 4 leaves. This means that the bird knows the 5 between two and three.
Another interesting experiment showed a bird's 6 number sense. A man was trying to take a photo of a crow（乌鸦）that had a nest in a tower, but the crow always left when she saw him coming. The bird did not 7 until the man left the tower. The man had an 8.He took another man with him to the tower. One man left and the other stayed, but they did not 9 the bird. The crow stayed away until the second man left, too. The experiment was 10 with three men and then with four men. But the crow did not return to the nest until all the men were 11.It was not until five men went into the tower and only four left that they were 12 able to fool the crow.
How good is a human's number sense? It's not very good. For example, babies about fourteen months old almost always notice if something is taken away from a 13 group. But when the number goes beyond three or four, the children are 14 fooled.
It seems that number sense is something we have in common with many animals in this world, and that our human 15 is not much better than a crow's.
1. A．rise B．pattern C．change D．trend
2. A．Importantly B．Surprisingly C．Disappointedly D．Fortunately
3. A．survive B．care C．hatch D．notice
4. A．generally B．sincerely C．casually D．deliberately
5. A．distance B．range C．different D．interval
6. A．amazing B．annoying C．satisfying D．disturbing
7. A．relax B．recover C．react D．return
8. A．appointment B．excuse C．idea D．explanation
9. A．fool B．hurt C．catch D．kill
10. A．reported B．repeated C．designed D．approved
11. A．confused B．gone C．tired D．drunk
12. A．gradually B．luckily C．strangely D．finally
13. A．single B．small C．local D．new
14. A．seldom B．temporarily C．merely D．often
15. A．sight B．nature C．ability D．belief
高三英语完型填空中等难度题查看答案及解析
Modern agriculture and its ability to feed billions of people may be among humanity’s greatest successes. However, it comes with hidden costs. For example, have you ever considered how much water is needed to provide you with a steak or a salad? It may surprise you.
In a recent study published in the journal Nutrients, scientists from the Commonwealth Scientific and Industrial Research Organization(CSIRO), Australia's national science organization, took a close look at the diets of 9,341 adult Australians—specifically, their “water-scarcity footprints(水消耗足迹)”.
It turned out that a sweet tooth not only adds to our waistlines(腰围) but also stresses our water resources. The water-scarcity footprint is a widely recognized measurement of water consumption. First, it counts the liters of water you used. Then, it looks at the place where the water was used. The more lacking water is in your area, the larger your water-scarcity footprint.
The scientists found that the average Australian's diet had a water-scarcity footprint of 362 liters per day. Snacks—cookies, cakes and alcohol—accounted for 25 percent of the water-scarcity footprint. The research also included a glass of wine(41 liters), a single serving of potato chips(23 liters), and a small bar of milk chocolate(21 liters).
Not surprisingly, cutting out snacks would be the N0.1 priority if you wanted to lower your own water-scarcity footprint.
Earth's surface is 70 percent water, but only 2.5 percent of that can be used for drinking or farming. By 2030, a world of about 8.6 billion people will need 35 percent more water, 40 percent more energy, and 50 percent more food, according to the United States National Intelligence Council. So, we need to watch what we eat, not just for our personal health but for the health of our societies.
1.What did the recent study closely focus on?
A.Modern agriculture. B.Average Australians.
C.Water resources. D.Water-scarcity footprints.
2.What did scientists from CSIRO find in their study?
A.Sweet teeth lead to thin waistlines.
B.Australians' diets are mainly made up of snacks.
C.The water-scarcity fooprint is a measurement of saving water.
D.Lacking water in our area means a larger water-scarcity footprint.
3.What does the underlined part “the N0.1 priority” in Paragraph 5 probably mean?
A.the least important thing B.the least impossible thing
C.something to be done first D.something to be prevented first
4.What does the last paragraph intend to tell us?
A.Take care of our diets. B.Protect our drinking water.
C.Make good use of energy. D.Produce more healthy food.
高三英语阅读理解中等难度题查看答案及解析
Modem agriculture and its ability to feed billions of people may be one of humanity's greatest achievements. However it comes with hidden costs. For example, have you ever considered how much water is needed to provide you with a steak or a salad? It may surprise you.
In a recent study published in the journal Nutrients, scientists from the Commonwealth Scientific and Industrial Research Organization(CSIRO). Australia's national science organization, took a close look at the diets of 9,341 adult Australians — specifically, their "water-scarcity footprints(水消耗足迹)". It turns out that a sweet tooth not only adds to our waistlines but also stresses our water resources.
The water-scarcity footprint is a widely recognized measurement of water consumption. First, it counts the liters of water you used. Then, it looks at the place where the water was used. Using a liter of water in the desert is not the same as using a liter of water in a tropical rainforest. The more scarce water is in your area, the larger your water-scarcity footprint.
The scientists found that the average Australian's diet had a water-scarcity footprint of 362 liters per day. Snacks and beverages — cookies, cakes, sodas and alcohol — accounted for 25 percent of the water-scarcity footprint. The research also included a glass of wine (41 liters), a single serving of potato chips (23 liters), and a small bar of milk chocolate (21 liters).
Not surprisingly, cutting down on snacks would be the top priority if we wanted to lower our own water-scarcity footprint.
Earth's surface is 70 percent water, but only 2.5 percent of that can be used for drinking or farming. While humanity faces an uphill battle to feed its growing population, climate change is causing droughts and extreme weather in agricultural centers like California and eastern Australia. Cities aren't safe, either. In 2018, Cape Town, South Africa, nearly ran out of water due to a drought. Its freshwater reservoir(储藏)stayed at just above 13.5 percent of full capacity. By 2030, a world of about 8.6 billion people will need 35 percent more water, 40 percent more energy, and 50 percent more food, according to the United States National Intelligence Council.
So, we need to watch what we eat, not just for our personal health but for the health of our societies.
1.Scientists find from their studies that .
A.Modem agriculture has the ability to feed billions of people
B.A steak or a salad consumes much water
C.A sweet tooth puts pressure on water resources
D.Snacks consume 85 liters of water per day
2.What is the public's attitude to the water-scarcity footprint as a way to measure water consumption?
A.Doubtful B.Approving
C.Negative D.Indifferent
3.The author develops the sixth paragraph mainly .
A.by explaining an experiment B.by analyzing a problem
C.by making comparisons D.by listing numbers
4.What is the best title for the text?
A.Water-scarcity footprint is measured B.Water waste starts with snacks
C.Water resources are reduced D.Water consumption faces an uphill battle
高三英语阅读理解中等难度题查看答案及解析
Even if we have an extremely healthy diet and lifestyle, the human body is programmed to wear out at a maximum of about 120 years, and usually less. We all have a biological clock inside us which determines the moment when our organs cease to function properly. This is because our cells have stopped renewing themselves and our body can no longer repair itself. This is also the moment when we are more likely to begin to suffer from the diseases of old age such as arthritis and Alzheimer’s. However, rapid advances in DNA research are beginning to throw light on the secrets of the ageing process. By the end of this century we could literally have the power of life over death.
Although it has long been accepted that humans have a fixed lifespan, it is also a fact that certain other organisms, such as reptiles and amphibians, appear to live indefinitely. The only reason we do not see 500-year-old alligators is because in the wild their lives are always in danger, from man, from pollution and from other animals. When they are kept in zoos they do not seem to age at all after they are fully grown. The same is true of some species of fish, which grow indefinitely and show no signs of ageing. The existence of animals with no fixed lifespan seems to indicate that an age gene really does exist. It is this gene which scientists are searching for, which may delay or repair damage to the body caused by ageing.
Another new area of research involves the oxidation（氧化） theory, which says that ageing is caused by the same process that makes iron rust. In controlled experiments, the lifespans of certain animals were shown to be lengthened with anti-oxidants; for example, the lifespan of mice can be increased by 30%. Antioxidants are already being used in face creams and other cosmetics, and they are likely to play an important part in keeping people physically young.
Perhaps the most immediate advance we are likely to see in the battle to halt（停止）the ageing process will be organ replacement. By the year 2020 it is likely that we will be replacing injured bones or even organs like livers and kidneys with ones “grown” in laboratories. By 2050 perhaps every organ in the body, except the brain, will have become commercially available. Recent experiments also show that it may one day be possible to “grow” new organs inside our body to replace worn-out ones, something which lizards and alligators already do.
Suddenly immortality（不死，不朽） seems within reach. We can begin to imagine a future where we are born, we grow to maturity, but we never grow old and die. But do we really want to live forever?
1. When all humans reach a certain age, ________.
A．they suffer the effects of their diet and lifestyle
B．the organs stop to perform appropriately
C．their cells continue to renew themselves
D．they develop arthritis and Alzheimer’s
2. The purpose of showing the case of alligators is to prove ________.
A．alligators are in danger in the wild because of the threat from man, pollution and other animals
B．it is widely accepted that humans have a fixed lifespan
C．there exists an age gene which may control ageing
D．the age gene damages the body
3.The underlined phrase “live indefinitely” in Paragraph 2 probably mean ________.
A．live for a period of time without a fixed end
B．live without a clear aim
C．live in an uncertain way
D．live without being fully grown
4.It can be inferred from Paragraph 4 that ________.
A．by 2050 we might have most of our worn-out organs replaced with new ones commercially
B．never can the ageing process be avoided
C．livers and kidneys are sure to be grown in laboratories by the year 2020
D．lizards and alligators grow new organs inside their body to replace worn-out ones
5. What is the main topic of this passage?
A．DNA researches show how our cells renew themselves.
B．Anti-oxidants are likely to play an important part in keeping people young.
C．How our biological clock works?
D．Eternal（永恒的） youth: new developments in anti-ageing research.
6.By saying “But do we really want to live forever”, the author may probably mean ________.
A．a future where we are born, we grow to maturity, but we never grow old and die is on its way
B．he is uncertain whether we can live forever
C．it remains to be seen whether immortality is a blessing or a curse
D．immortality is no longer a dream
高三英语阅读理解简单题查看答案及解析
That the success of humans as a species depends to a large extent on our ability to cooperate in groups is widely believed. Much more so than any other animal, people are able to coordinate and join their forces and actions to produce mutual benefits.
New research involving Dr Molleman, an expert at the University of Nottingham, suggests that successful cooperation in groups depends on how people gather information about their peers, and how they base their cooperative decisions on it.
Biologists wonder how cooperation could have developed by natural selection: it is puzzling how cooperation can be beneficial when it is possible to behave selfishly and take advantage of the cooperative efforts of your group. Psychologists and economists try hard to understand why many people are willing to sacrifice their own welfare to benefit their social environment. They asked questions like “How do people make decisions when their actions can affect the welfare of others?” “How people determine their behavior when they have to cooperate in groups?”.
Dr Pieter Van Den Berg from the University of Groningen said, “From previous research we know that some people are ‘majority-oriented (以……为中心)’ and tend to look at the behavior of the majority in their group, whereas others are ‘success-oriented’ and try to find out what kind of behavior pays off best for themselves.”
Dr Molleman, from the center of the Decision Research and Experimental Economics, said, “It turns out that behavior in groups of success-oriented people was much more selfish than it in groups of majority-oriented people. As a consequence, the people in the majority-oriented groups tended to cam more money in the experiment since they cooperated more.”
1.Compared with other animals, human beings are capable of ________.
A. communicating well with others B. working together with each other
C. surviving some natural disasters D. getting access to various information
2.What are the psychologists and economists most interested in?
A. Whether people’s personal efforts will pay off eventually.
B. How cooperation has developed over a long lime naturally.
C. Why people offer to affect those around them unselfishly.
D. What benefit that good cooperation can bring immediately.
3.We can infer that the success-oriented people________.
A. are careful to select a group to join
B. are likely to be successful in the future
C. pay more attention to the result of their effort
D. have some skills in collecting useful information
4.What is the new finding of the research?
A. Having good relationship gets us to live fullest life.
B. Focusing on individual success makes people selfish.
C. Being considerate can ensure our long-term benefit.
D. Mastering social skills help create harmonious society.
高三英语阅读理解中等难度题查看答案及解析