The sound of a mosquito can mean trouble in many parts of the world. The bite of the mosquito can be deadly. The insects carry serious diseases like malaria (疟疾). It is estimated that almost 630,000 people died from malaria and malariarelated causes in 2012, and most of these cases were in African countries.
In the United States, a group of California scientists are working to develop a more effective and less costly substance (物质) to protect people from mosquitoes. The researchers are investigating the sense of smell in mosquitoes. They found the insects use the same receptor for identifying carbon dioxide in human breath as they do for the smell of our skin. Anandasankar Ray, who is leading the investigation, says scientists tested more than a million chemical compounds (化合物) until they found a substance called Ethyl Pyruvate. He says Ethyl Pyruvate makes the mosquitoes' receptors inactive. “When we apply Ethyl Pyruvate to a human arm and offer it to hungry mosquitoes in a cage, very few of the mosquitoes are attracted to the human arm because only a few of them are able to smell it out,” said Ray.
Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons (神经元) of noble cells that recognize both the smell of human breath and skin. “With the device used to examine the mosquito, we are able to insert a very small electrode (电极) into the part of the mosquito's nose, where its smelling neurons are and where the smell is happening,” said Tauxe.
Anandasankar Ray says a product based on Ethyl Pyruvate may cost less to produce than DEFT, the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.
“Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behaviour control products,” said Ray.
1.The underlined word in the second paragraph probably means ________.
A. a substance that protects people from mosquitoes
B. a piece of equipment that sends signals
C. a device that reacts to light
D. a sense organ that reacts to changes
2.According to the passage, Ethyl Pyruvate can ________.
A. kill the mosquitoes' smelling neurons
B. cause the mosquitoes to lose their senses of smell
C. result in the inactiveness of the mosquitoes' receptors
D. make the mosquitoes uninterested in human breath and skin smell
3.Which of the following would be the best title for the passage?
A. Ethyl Pyruvate—an Insect Behaviour Control Product
B. Malaria—a Serious Disease Causing 630,000 Deaths
C. Scientists Find a New Substance to Fight Mosquitoes
D. A New Generation of DEET Has Been Developed to Kill Mosquitoes
4.This passage most probably appears in ________.
A. a textbook of medical schools
B. a collection of doctors' essays
C. the column of newspaper ads
D. the health column of a magazine
高三英语阅读理解中等难度题
The sound of a mosquito can mean trouble in many parts of the world. The bite of the mosquito can be deadly. The insects carry serious diseases like malaria (疟疾). It is estimated that almost 630,000 people died from malaria and malariarelated causes in 2012, and most of these cases were in African countries.
In the United States, a group of California scientists are working to develop a more effective and less costly substance (物质) to protect people from mosquitoes. The researchers are investigating the sense of smell in mosquitoes. They found the insects use the same receptor for identifying carbon dioxide in human breath as they do for the smell of our skin. Anandasankar Ray, who is leading the investigation, says scientists tested more than a million chemical compounds (化合物) until they found a substance called Ethyl Pyruvate. He says Ethyl Pyruvate makes the mosquitoes' receptors inactive. “When we apply Ethyl Pyruvate to a human arm and offer it to hungry mosquitoes in a cage, very few of the mosquitoes are attracted to the human arm because only a few of them are able to smell it out,” said Ray.
Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons (神经元) of noble cells that recognize both the smell of human breath and skin. “With the device used to examine the mosquito, we are able to insert a very small electrode (电极) into the part of the mosquito's nose, where its smelling neurons are and where the smell is happening,” said Tauxe.
Anandasankar Ray says a product based on Ethyl Pyruvate may cost less to produce than DEFT, the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.
“Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behaviour control products,” said Ray.
1.The underlined word in the second paragraph probably means ________.
A. a substance that protects people from mosquitoes
B. a piece of equipment that sends signals
C. a device that reacts to light
D. a sense organ that reacts to changes
2.According to the passage, Ethyl Pyruvate can ________.
A. kill the mosquitoes' smelling neurons
B. cause the mosquitoes to lose their senses of smell
C. result in the inactiveness of the mosquitoes' receptors
D. make the mosquitoes uninterested in human breath and skin smell
3.Which of the following would be the best title for the passage?
A. Ethyl Pyruvate—an Insect Behaviour Control Product
B. Malaria—a Serious Disease Causing 630,000 Deaths
C. Scientists Find a New Substance to Fight Mosquitoes
D. A New Generation of DEET Has Been Developed to Kill Mosquitoes
4.This passage most probably appears in ________.
A. a textbook of medical schools
B. a collection of doctors' essays
C. the column of newspaper ads
D. the health column of a magazine
高三英语阅读理解中等难度题查看答案及解析
The sound of a mosquito can mean trouble in many parts of the world. The bite of the mosquito can be deadly. The insects carry serious diseases like malaria. It is estimated that almost 630,000 people died from malaria and malaria-related causes in 2012, and most of these cases were in African countries.
In the United States, a group of California scientists is working to develop a more effective and less costly substance(物质)to protect people from mosquitoes. The researchers are investigating the sense of smell in mosquitoes. They found the insects use the same receptor(感受器)for identifying carbon dioxide in human breath as they do for the smell of our skin. Anandasankar Ray, who is leading the investigation, says scientists tested more than a million chemical compounds(化合物)until they found a substance called Ethyl pyruvate. He says Ethyl pyruvate makes the mosquitoes' receptor inactive. ”When we apply Ethyl pyruvate to a human arm and offer it to hungry mosquitoes in a cage, very few of the mosquitoes are attracted to the human arm because only a few of them are able to smell it out,” said Ray.
Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons (神经元)of nose cells that recognise both the smell of human breath and skin. "With the device used to examine mosquitoes, we are able to insert a very small electrode(电极)into the part of the mosquitoes' nose, where its smelling neurons are and where the smell is happening," said Tauxe.
Anandasankar Ray says a product based on Ethyl pyruvate may cost less to produce than DEFT，the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.
“Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behavior control products," said Ray.
1.The best title for the passage is most probably _______________________________.
A. Scientists Find New Substance to Fight Mosquitoes
B. A New Generation of DEET Has Been Developed to Kill Mosquitoes
C. Malaria一a Serious Disease Causing 630,000 Deaths
D. Ethyl Pyruvate一an Insect Behavior Control Product
2.According to the passage, Ethyl Pyruvate can_______________________________.
A. kill the mosquitoes' smelling neurons
B. cause the mosquitoes to lose their sense of smell
C. result in the inactiveness of the mosquitoes' receptor
D. make the mosquitoes uninterested in human breath and skin smell
3.Through the passage, the writer aims to_______________________________.
A. inform readers of the new development in fighting mosquitoes
B. praise the achievements made in the battle against malaria
C. introduce a cheaper product in fighting mosquitoes
D. tell the differences between Ethyl Pyruvate and DEET
4.This passage most probably appears in_______________________________.
A. the column of newspaper ads
B. the health column of a magazine
C. a textbook of medical schools
D. a collection of doctors' essays
高三英语阅读理解困难题查看答案及解析
The sight of a mosquito can mean trouble to people in many parts of the world. The bite of the mosquito can be deadly. The insects carry serious diseases like malaria (疟疾). It is estimated that almost 630,000 people died from malaria and malariarelated causes in 2012, and most of these cases were in African countries.
In the United States, a group of California scientists are working to develop a more effective and less costly substance (物质) to protect people from mosquitoes. The researchers are investigating the sense of smell in mosquitoes. They found the insects use the same receptor for identifying carbon dioxide in human breath as they do for the smell of our skin. Anandasankar Ray, who is leading the investigation, says scientists tested more than a million chemical compounds (化合物) until they found a substance called Ethyl Pyruvate. He says Ethyl Pyruvate makes the mosquitoes' receptors inactive. “When we apply Ethyl Pyruvate to a human arm and offer it to hungry mosquitoes in a cage, very few of the mosquitoes are attracted to the human arm because only a few of them are able to smell it out,” said Ray.
Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons (神经元) of noble cells that recognize both the smell of human breath and skin. “With the device used to examine the mosquito, we are able to insert a very small electrode (电极) into the part of the mosquito's nose, where its smelling neurons are and where the smell is happening,” said Tauxe.
Anandasankar Ray says a product based on Ethyl Pyruvate may cost less to produce than DEFT, the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.
“Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behaviour control products,” said Ray.ytytzygx.
1.The underlined word in the second paragraph probably means ________.
A. a substance that protects people from mosquitoes
B. a sense organ that reacts to changes
C. a device that reacts to light
D. a piece of equipment that sends signals
2.According to the passage, Ethyl Pyruvate can ________.
A. kill the mosquitoes' smelling neurons
B. cause the mosquitoes to lose their senses of smell
C. result in the inactiveness of the mosquitoes' receptors
D. make the mosquitoes uninterested in human breath and skin smell
3.This passage most probably appears in ________.
A. a textbook of medical schools
B. a collection of doctors' essays
C. the column of newspaper ads
D. the health column of a magazine
4.Which of the following would be the best title for the passage?
A. Ethyl Pyruvate—an Insect Behaviour Control Product
B. Malaria—a Serious Disease Causing 630,000 Deaths
C. Scientists Find a New Substance to Fight Mosquitoes
D. A New Generation of DEET Has Been Developed to Kill Mosquitoes
高三英语阅读理解中等难度题查看答案及解析
Over the past five decades mosquito populations in parts of the U.S. have skyrocketed by a factor of 10-a situation with worrying implications for the spread of diseases. And some places are apparently more easily affected than others. A new study in the Journal of Medical Entomology found that in Baltimore, low-income neighborhoods bear the biggest burden: they have not only more mosquitoes but also larger ones, which often survive longer. The problem most likely is rooted in the fact that Baltimore has nearly 17,000 abandoned buildings, which are concentrated in economically disadvantaged areas and serve as convenient mosquito-breeding zones.
Compared with prosperous blocks, low-income blocks have more abandoned buildings and are more heavily littered with thrown-away containers that collect standing water. And water that pools in abandoned buildings is protected by shade-which helps mosquitoes grow larger. Some cities take efforts to plant trees in low-income blocks but may actually worsen the problem: trees and bushes not only shade outdoor breeding(繁殖) pools but also shed leaves into the water and feed the mosquito larvae(幼虫), helping them grow bigger. Worse still, climate change could worsen the disease landscape by broadening habitats and lengthening the time every summer that mosquitoes can breed and survive.
Cities may, then, need to focus more mosquito-control efforts on these areas. Urban health departments typically educate homeowners about the importance of emptying water out of outdoor containers. But nobody empties those in or around abandoned buildings. “It is something that is fairly difficult for a city to address because it’s really expensive to go into private belongings and clean them up,” says Dina Fonseca, a molecular ecologist at Rutgers University. Yet if these belongings become breeding grounds not only for annoying mosquitoes but also for dangerous diseases, officials’ concepts may need to change.
1.What does the phrase “a factor of 10” in Paragraph 1 refer to?
A.A major cause. B.A high rate.
C.A big concern. D.A special situation.
2.Why is the spread of diseases relatively more serious in poor neighborhoods in Baltimore?
A.Because people there lack the awareness of waste sorting.
B.Because people there pay little attention to water protection.
C.Because more thrown-away containers are collected for reuse there.
D.Because more abandoned buildings serve as habitats for mosquitoes there.
3.Which of the following solutions is well-intentioned but may result in opposite effects?
A.Planting more trees. B.Changing officials’ ideas.
C.Emptying water containers. D.Cleaning abandoned buildings.
4.What is the author’s purpose in writing the text?
A.To complain about the poor housing. B.To offer some treatments for diseases.
C.To appeal for mosquito-control efforts. D.To introduce a new species of mosquitoes.
高三英语阅读理解中等难度题查看答案及解析
—How many teachers are party members in your school?
—Part members___________________ one fifth of the number of the teachers in our school.
A．take up B．set up C．make up D．fix up
高三英语单项填空简单题查看答案及解析
In the forest, sound is the best means of communication over distance ________ in comparison with light, it won't be blocked by trees when travelling.
A. while B. because
C. when D. though
高三英语单项填空中等难度题查看答案及解析
Culture means any human behavior that is learned in human society. All of the meaningful parts of a culture are passed on to different generations through tradition or social learning. ________1.________ Culture exists in agricultural as well as industrialized societies.
Culture is necessary for the survival and existence of human beings as human beings. Practically everything humans know, think, value, feel, and do is learned through taking part in a sociocultural system. ________2. Here is one of the cases of children growing up apart from human society. In the province of Midnapore in India, the director of a children’s home was told by local villagers that there were “ghost” in the forest. Upon looking into the case, the director found that two children, one about eight years old and the other about six years old, appeared to have been living a pack of wolves in the forest. ________3. In his diary, the director describes his first view of Kamala (as the older child was named) and Amala ( the name given to the younger child):
Kamala was a terrible-looking being, the head, a big ball of something covering the shoulders. ________4.________ Their eyes were bright and sharp, unlike human eyes. They were very fond of raw meat and raw milk. Gradually, as they got stronger, they began going on all fours, and afterwards began to run on all fours, just like squirrels.
Children learn human language in the same way they learn other kinds of human behavior——by taking part in a cultural community. ________5.
A．From this viewpoint, all human groups have a culture.
B．Close at its heels there came another terrible creature exactly like the first, but smaller in size.
C．Human beings can only develop human abilities by the local people.
D．This statement is well supported by some well-written cases.
E. These children were the ghosts described by the local people.
F. Culture refers only to the high art and classical music of a particular society.
G. They learn a certain human languages as well as certain kinds of human behavior through their membership in a certain cultural community.
高三英语信息匹配中等难度题查看答案及解析
Difficult as part of the passage was ________, I managed to catch hold of its meaning in the end.
A. understanding B. to be understood
C. to understand D. being understood
高三英语单项填空困难题查看答案及解析
It wasn't until I ______ took part in the activity that I understood the meaning of it.
A.actively B.personally
C.rarely D.normally
高三英语单项填空中等难度题查看答案及解析
For Americans, a mosquito bite is an itchy bother. But for many in Africa, a tiny bite can be deadly. One million people die each year of malaria, a disease spread by infected mosquitoes. Most of these people live in Africa, and are under age 5.
Malaria can be prevented and treated. However, many African nations don't have the funds to fight it. Nothing but Nets (NBN) hopes to change that. The United Nations Foundation created the campaign in 2006. The aim is to prevent malaria by covering sleeping areas with nets. Hanging bed nets treated with insecticide(杀虫剂) is the simplest way to stop mosquitoes from biting at night. The chemicals last four to five years. For $10, anyone can send a net to Africa and help save a life.
So far, NBN has raised $19 million and delivered 700,000 nets to seven countries. Families are taught how to use the nets. Kids also get vaccines (疫苗)and vitamins. "Women line up for miles to get the medicine for their kids," says NBN director Elizabeth McKee Gore. "They understand the importance."
So do kids in this country. "They get so excited thinking of ways to raise money," says NBN spokesperson and basketball star Ruth Riley.
NBN's biggest fund-raiser is Katherine Commale, 7. She's been spreading the information about bed nets for the past two years. To show how they work, she and her brother made a video. "We teach that bed nets can save lives," she said.
Katherine has raised $42,000 for NBN. "She just wants those who need a net to have one," says her mom, Lynda. "It's pretty simple to her." To find out how you can help, visit nothingbutnets.net.
1.We know from the passage that NBN is in fact _________.
A. a deadly disease B. an organization
C. a piece of equipment D. a game
2.The purpose of the passage is most probably ___________.
A. to list the sufferings of the African people
B. to introduce new ways to avoid mosquito bites
C. to call on people to offer their help to Africans
D. to tell people how to buy nets in Africa
3. By saying “So do kids in this country” in Paragraph 4,the author means that kids in this country also ___________.
A. know the importance of the bed nets
B. know how to protect themselves
C. lack nets to protect themselves
D. suffer from malaria
4. What do we know about Katherine from the passage?
A. She set up the website nothingbutnets.net.
B. She is the youngest money-raiser for NBN.
C. She raised money by making and selling videos.
D. She started working for NBN at the age of 5.
高三英语阅读理解中等难度题查看答案及解析