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?
高二英语阅读理解简单题
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?
高二英语阅读理解简单题查看答案及解析
Global warming threatens to hold back human progress, and make unachievable all UN targets to reduce poverty, according to some of the world’s leading international development groups.
In a report published today, Oxfam, Greenpeace, Christian Aid, Friends of the Earth, WWF and 15 other groups say rich governments must immediately address climate change to avoid even “unbearable levels” of worldwide poverty.
“Food production, water supplies, public health and people’s living environment are already being damaged,” the report says. “The world must meet its promise to achieve poverty reduction and also deal with climate change.”
The report, which draws on UN predictions of the effects of climate change in poor countries over the next 50 years, says poor countries will experience more flooding, declining food production, more disease and the worsening or disappearing of entire ecosystems on which many of the world’s poorest people depend.
“Climate change needs to be addressed now. The poor will bear the burden of it. The frontline experience of many of us working in international development indicates that communities are having to fight against more extreme weather conditions.”
Climate change will play havoc (浩劫) with agriculture and water supplies and will increase diseases. “By 2025 the proportion of the world’s population living in countries of great water stress will almost double, to 6 billion people. Tropical and sub-tropical areas will be hardest hit — those countries already suffering from food shortage”.
Poor countries mostly do not need high-tech solutions, but would most benefit from education, research and being shown how to farm better. The report says unchecked global warming, more than wars or political confusion, will displace millions of people and destabilize (不安定) many countries.
1.Who should play a leading role in resisting the more extreme weather conditions?
A. International groups.
B. Rich countries.
C. Poor countries.
D. Tropical and sub-tropical countries.
2.Which of the following is not true according to the text?
A. Poverty and climate change are closely linked.
B. More and more people will suffer from the water stress and food shortage.
C. What the poor countries need badly is high technology.
D. International communities have to take steps to resist the bad climate.
3.What is the best title of the passage?
A. International Development Brings in Climate Change
B. Global Warming Is a Bigger Threat to the Poor
C. International Groups Work Together to Reduce Poverty
D. Worldwide Poverty Shall Be Avoided
________
高二英语阅读理解中等难度题查看答案及解析
Oscar the cat seems to have an unnatural ability for predicting when nursing home patients are going to die, by curling up (蜷伏) next to them during their final hours. His accuracy, observed in 25 cases, has led the staff to call family members once he has chosen someone. It usually means the patient has less than four hours to live. "Many family members take some comfort from it. They appreciate the companionship that the cat provides for their dying loved one," said Dosa, a doctor and assistant professor of medicine at Brown University.
The 2-year-old cat was adopted as a kitten and grew up in a third-floor dementia (痴呆) unit at the Steere House Nursing and Rehabilitation Center, where the facility treats people with Alzheimer's, Parkinson's disease and other illnesses. After about six months, the staff noticed Oscar would make his own rounds, just like the doctors and nurses. He'd smell and observe patients, then sit beside people who would end up dying in a few hours. Dosa said Oscar seems to take his work seriously. "This is not a cat that's friendly to people," he said.
"Oscar is better at predicting death than the people who work here," said Dr. Joan Teno of Brown University, who treats patients at the nursing home and is an expert on care for the terminally ill. She was convinced of Oscar's talent when he made his 13th correct call. While observing one patient, Teno said she noticed the woman wasn't eating, was breathing with difficulty and that her legs had a bluish color, signs that often mean death is near. Oscar wouldn't stay inside the room, though, so Teno thought bis streak was broken. Instead, it turned out the doctor's prediction was roughly 10 hours too early. Sure enough, during the patient's final two hours, nurses told Teno that Oscar joined the woman at her bedside.
Doctors say most of the people who get a visit from the sweet-faced, gray-and-white cat are so ill that they probably don't know he's there, so patients aren't aware he's a predictor of death. Most families are grateful for the advance warning, although one wanted Oscar out of the room while a family member died. When Oscar is put outside, he paces and meows his displeasure.
No one's certain if Oscar's behavior is scientifically significant or points to a cause. Teno wonders if the cat senses mysterious scents or reads something into the behavior of the nurses who raised him. Nursing home staff aren't concerned with explaining Oscar, so long as he gives families a better chance at saying goodbye to the dying. The staff recently gave Oscar a wall sign publicly praising his "sympathetic care."
1.What makes Oscar the cat so special?
A. He observes the cases of dying patients.
B. He curls up next to the patients.
C. He calls family members to the hospital.
D. He senses when patients are to die.
2.The passage tells us Oscar_____.
A. would go round and observe patients
B. may sometimes fail to predict death
C. is friendly and liked by every nurse
D. was born and grew up in the hospital
3.The underlined words "his streak was broken" probably mean ____.
A. his bones were severely injured
B. his magic power stopped working
C. his devotion to work got changed
D. his friendship with patients ended
4.From the passage, we learn that_____.
A. Oscar's behavior is scientifically significant
B. Oscar can read something of the nurses' behavior
C. Oscar might like to stay with the dying patients
D. Oscar is sympathetic to the dying patients
5.The best title for this passage is "____".
A. Cats Can Be Used for Looking After Patients
B. Oscar, the Sweet-Faced, Gray-and-White Cat
C. As Death Comes Calling, So Does Oscar the Cat
D. Oscar the Cat, the Best Helper of Our Hospital
高二英语阅读理解困难题查看答案及解析
Throughout time, people have loved music for its ability to transport them into a world of rhythm and melody. Recently more and more hospitals and clinics have been tapping into the power of music –not only to comfort patients, but to help cure them as well. Welcome to the world of music therapy(疗法).
After each of the two world wars, musicians visited hospitals and played instruments for injured soldiers suffering from emotional and physical pain. Today's music therapists continue this practice, playing instruments such as guitars and harps to bring comfort to their audiences.
Therapist Eric Mammen encourages his patients at a children’s hospital to participate with him as he plays. During visits with 13-year-old cancer patient Lawrence Garcia, Mammen encourages Garcia to beat on electric drums while he plays the guitar. The therapy won’t cure his cancer, but it does, according to Garcia’s mom, take away much of the boy’s depression(沮丧).
Music therapy can put patients in better moods and ease the symptoms of depression according to the American Music Therapy Association. Other benefits include relieving pain, calming tension, aiding sleep, reducing worry or fear, and easing muscle tension.
Jose Haro personally experienced the benefits of music therapy when he was recovering from heart surgery. During his recovery, he played a piano whose keys lit up, indicating which keys to touch to play along with the background music. Soon he was playing tunes and noticing something strange. “I was searching for my pain.” He says of his experience, “but it was gone.”
While Haro's experience provides an evidence of the power of music to relieve pain, scientific research has proven music also helps patients with Alzheimer's disease and arthritis.
In addition, music therapy helps premature babies. Doctors are tapping into a powerful way to teach premature babies that haven’t yet learned how to suck. Doctors use a device that comforts the babies by playing music when they suck on a pacifier(奶嘴). Soon the babies learn to suck in return for music, gaining weight faster and going home earlier than those who do not use the device.
Even perfectly healthy people are discovering the power of music to calm and heal. Drum circles attract people who find stress relief in beating out rhythms. While music is not a cure-all, it does make life a little easier.
1.In the first paragraph, the underlined phrase “ tapping into “ can be replaced by “_________”
A.discussing on B.looking for C.showing interest in D.making use of
2.According to the passage, Jose Haro_______________.
A.went through an obvious effect of music on his recovery
B.was asked to play the piano with the background music
C.felt no pain in his surgery because of music therapy
D.recovered from heart disease completely
3.From the passage, we know_________________.
A.music can prevent people from suffering from arthritis
B.Garcia found much comfort in music according to his mom
C.musicians cured many soldiers after each of the two world wars
D.the more music they listen to, the faster premature babies gain weight
4.What is the best title for this passage?
A.Music to Patient Ears B.Music Popular in Hospitals
C.Musicians Work with Doctors D.People's life Benefits from Music
高二英语阅读理解中等难度题查看答案及解析
Human beings are the most intelligent of all animals because we are gifted with the ability to think and reason logically. Scientists and even common people with special intelligence have made a lot of inventions and contributions to modern lifestyle in the past. "Houses" have been the most popular area for discoveries and inventions in the past and even now.
Many household items have been the result of inventions of people who desired better functioning of the existent products. Every individual has intelligence and if it is used properly for the right purpose it leads to invention of a new tool or device. Many new household inventions are made almost every day and there are specific companies, which particularly keep a record of all these inventions.
A lot of inventions have been made recently in the household field. These products are patented(专利的)and have trade mark licenses. The patented sliding cinch is a very simple but effective method to prevent shoulder stress and injury for those who work before computers all day long. Vanity PC is a type of computer furniture that specifically hides all the computer wires and keeps a clean and good look. All the outdoor dust, mud and snow can be kept out of the house by fixing the dirt drain(排水管)at the entrance of the door. Another important invention is the automatic toilet night-light, in which a small light starts when the lid of the toilet seat is opened and closes as soon as the lid is closed.
These are some of the new household inventions invented mostly by common people. Thus, a variety of new household items are invented every day, which helps in a better functioning of household chores(家务)and in a more useful manner.
1.The first paragraph is intended to ________.
A. stress the importance of inventions
B. introduce the topic of the article
C. show the advantages of modern lifestyle
D. tell the differences between human beings and animals
2.According to the passage, people make house inventions to ________.
A. earn more money and gain awards
B. accumulate their wealth
C. improve the present living conditions
D. meet the new demands of new science
3.It can be inferred that the sliding cinch is used to ________.
A. prevent your shoulder from being over-pressured
B. keep your shoulder safe and sound when you are in an accident or an operation
C. help you practice your shoulder more often and reduce shoulder pains
D. cover your shoulder and make it stronger to resist the outside strike
4.Common people can also make good inventions because ________.
A. wisdom and inspiration sometimes come from everyday life
B. some inventions are easy to be made and can be mastered by them
C. common people have a strong desire to do something for science research
D. success is often connected with hardship and bitter experience of common people
5.The passage mainly talks about ________.
A. the correct use of household facilities
B. different ideas about household inventions
C. the history of household inventions
D. household inventions and their influence
高二英语阅读理解困难题查看答案及解析
Human beings are the most intelligent of all animals because we are gifted with the ability to think and reason logically. Scientists and even common people with special intelligence have made a lot of inventions and contributions to modern lifestyle in the past. "Houses" have been the most popular area for discoveries and inventions in the past and even now.
Many household items have been the result of inventions of people who desired better functioning of the existent products. Every individual has intelligence and if it is used properly for the right purpose it leads to invention of a new tool or device. Many new household inventions are made almost every day and there are specific companies, which particularly keep a record of all these inventions.
A lot of inventions have been made recently in the household field. These products are patented(专利的)and have trade mark licenses(许可). The patented sliding cinch is a very simple but effective method to prevent shoulder stress and injury for those who work before computers all day long. Vanity PC is a type of computer furniture that specifically hides all the computer wires and keeps a clean and good look. All the outdoor dust, mud and snow can be kept out of the house by installing(安装)the dirt drain(排水管)at the entrance of the door. Another important invention is the automatic toilet night-light, in which a small light starts when the lid of the toilet seat is opened and closes as soon as the lid(盖子)is closed.
These are some of the new household inventions invented mostly by common people. Thus, a variety of new household items are invented every day, which helps in a better functioning of household chores(家务)and in a more useful manner.
1.The first paragraph is intended to _____________.
A. stress the importance of inventions
B. introduce the topic of the article
C. show the advantages of modern lifestyle
D. tell the differences between human beings and animals
2. According to the passage, people make house inventions to _____________.
A. earn more money and gain awards
B. accumulate their wealth
C. improve the present living conditions
D. meet the new demands of new science
3. It can be inferred that the sliding cinch is used to ___________.
A. prevent your shoulder from being over-pressured
B. keep your shoulder safe and sound when you are in an accident or an operation
C. help you practice your shoulder more often and reduce shoulder pains
D. cover your shoulder and make it stronger to resist the outside strike
4.Common people can also make good inventions because ___________.
A. wisdom and inspiration sometimes come from everyday life
B. some inventions are easy to be made and can be mastered by them
C. common people have a strong desire to do something for science research
D. success is often connected with hardship and bitter experience of common people
5.The passage mainly talks about _______________.
A. the correct use of household facilities
B. different ideas about household inventions
C. the history of household inventions
D. household inventions and their influence
高二英语阅读理解中等难度题查看答案及解析
It is in their ability to speak ______ humans ______ from animals.
A. which; differ B. that; different C. which; different D. that; differ
高二英语单项填空中等难度题查看答案及解析
It is in their ability to speak ______ humans ______ from animals.
A.which; differ | B.that; different |
C.that;differ | D.which;different |
高二英语单项填空中等难度题查看答案及解析
.
He has an extraordinary talent ______ painting and his works have been ______ display throughout the country .
A for in ; B in on ; C for on ; D with on
高二英语单项填空简单题查看答案及解析
______ to reach them on the phone, we sent an email instead.
A. Fail B. Failed
C. To fail D. Having failed
高二英语单项填空简单题查看答案及解析