Fear may be felt in the heart as well as in the head, according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.
Tests on healthy volunteers found that they were more likely to feel a sense of fear at the moment when their hearts are contracting (收缩) and pumping blood around their bodies, compared with the point when the heartbeat is relaxed. Scientists say the results suggest that the heart is able to influence how the brain responds to a fearful event, depending on which point it is at in its regular cycle of contraction and relaxation.
Sarah Garfinkel at the Brighton and Sussex Medical School said: "Our study shows for the first time that the way in which we deal with fear is different depending on when we see fearful pictures in relation to our heart."
The study tested 20 healthy volunteers on their reactions（反应）to fear as they were shown pictures of fearful faces. Dr Garfinkel said, "The study showed that fearful faces are better noticed when the heart is pumping than when it is relaxed. Thus our hearts can also affect what we see and what we don't see - and guide whether we see fear."
To further understand this relationship, the scientists also used a brain scanner (扫描仪) to show how the brain influences the way the heart changes a person's feeling of fear.
"We have found an important mechanism by which the heart and brain ‘speak’ to each other to change our feelings and reduce fear," Dr Garfinkel said.
"We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced, we may be able to develop more successful treatments for anxiety disorders, and also for those who may be suffering from serious stress disorder."
【小题1】What is the finding of the study?
| A．One's heart affects how he feels fear. |
| B．Fear is a result of one's relaxed heartbeat. |
| C．Fear has something to do with one's health. |
| D．One’s fast heartbeats are likely to cause fear. |
| A．volunteers' heartbeats when they saw terrible pictures |
| B．the time volunteers saw fearful pictures and their health conditions |
| C．volunteers' reactions to horrible pictures and data from their brain scans |
| D．different pictures shown to volunteers and their heart-brain communication |
| A．Order. | B．System. | C．Machine. | D．Treatment. |
| A．treating anxiety and stress better |
| B．explaining the cycle of fear and anxiety |
| C．finding the key to the heart-brain communication |
| D．understanding different fears in our hearts and heads |
【小题1】A
【小题2】C
【小题3】B
【小题4】A
解析试题分析：本文属于科普文，介绍了心脏与恐惧的关系。通过两次试验，研究者发现这两者之间的关系，同时借助这一发现，研究者希望能够减轻或者治疗恐惧和压力所带来的诸多问题。
【小题1】细节题：根据文章第一段第一句Fear may be felt in the heart as well as in the head, according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.可以得出本题答案A。C选项表述与本文无关，D选项表述不正确。
【小题2】细节题：根据文章第四段第一句The study tested 20 healthy volunteers on their reactions to fear as they were shown pictures of fearful faces.以及第五段第一句To further understand this relationship, the scientists also used a brain scanner(扫描仪) to show how the brain influences the way the heart changes a person's feeling of fear.可以得出研究是对测试者对恐怖的图画的反应和大脑扫描的数据进行的。本题答案C。
【小题3】猜词题：从后面的句子：by which the heart and brain ‘speak’ to each other to change our feelings and reduce fear,"可知大脑和心脏对话来改变我们的感觉和减少恐惧，这是一个系统，选B。
【小题4】主旨题：根据文章最后一段"We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced, we may be able to develop more successful treatments for anxiety disorders, and also for those for those who may be suffering from serious stress disorder."可以得出这个研究可以导致更好的治疗焦虑和压力。本题答案是A。
考点：考查科普类短文
科目：高中英语 来源： 题型：阅读理解
In Greek mythology(神话), fire is a gift form God, stolen from Zeus(宙斯) by Prometheus and handed over to humans suffering from cold. What could be more natural than sitting around a beautiful fire on a winter night, at a campsite in the Berkshires?
Hard as it may be to believe, the fireplace—long considered a trophy(奖杯), particularly in a city like New York—is acquiring a social shame. Among those who desire to be environmentally responsible, it is joining the ranks of bottled water and big houses.
Sally Treadwell, a 51-year-old public relations executive in Boone, N.C., said nothing makes her happier than building a fire on a cold winter night. But most of the time she doesn’t, because she feels too guilty about the damage it may do to the environment. Every time she builds a fire, it causes “inner conflict,” she said. “It’s a guilty pleasure”.
“The smoke from a fire smells very nice,” said Diane Bailey, a senior scientist with the Natural Resources Defense Council in San Francisco. “But it can cause a lot of harm. The tiny particles(颗粒) can cause illness, and can cross into the bloodstream, causing heart attacks as well as worsening other conditions.”
Growing concerns about the air pollution and health problems caused by smoke from wood fires are urging a number of areas across the country to pass laws regulating them. Idaho offers a tax cut to people who replace uncertified(不合格的)wood stoves with “greener” ones; San Joaquin County in California forbids selling a home unless its wood stove is replaced with an E.P.A. certified one；and Palo Alto and other governments in California forbid wood-burning fireplaces in new construction.
Certainly, many think otherwise. In any case, most fireplaces are used far too infrequently to cause any real damage to the environment, said Stephen Sears, the vice president of the Brick Industry Association, voicing an opinion shared by some.
Perhaps not coincidentally, sales of wood-burning equipment dropped to 235,000 in 2009 from 800,000 in 1999, according to the Brick Industry Association. It also reports that approximately 35,000 fireplaces were installed in the United States in 2009, compared to 80,000 in 2005. Certainly those numbers reflect the economic slowdown, but the may also be affected by growing mixed feelings to wood fries.
【小题1】We can infer from the 2nd paragraph that ________.
| A．big houses are not considered environmentally friendly |
| B．bottle water is a good companion for a fire place |
| C．a fireplace is viewed as a sign of success |
| D．people in New York are laughed at for their tradition |
| A．her love for the fireplace |
| B．the damage to the environment |
| C．the concern about her health |
| D．her mixed emotion fro the fireplace |
| A．uncertified fireplaces are forbidden in Idaho |
| B．some people are against the woodfire controlling regulations |
| C．only energy-efficient wood stoves can be used in the US |
| D．all the people support measures taken to control the use of fireplaces |
| A．To urge people to burn less wood |
| B．To discuss wood-burning’s impact |
| C．To throw light on the causes of the fireplace’s decline |
| D．To indicate the cooling love for the fireplace |
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科目：高中英语 来源： 题型：阅读理解
Many of us believe that a person’s mind becomes less active as he grows older. But this is not true, according to Dr Jarvik, professor of psychiatry at the University of California. She has studied the mental functioning of aging persons for several years. For example, one of her studies concerns 136 pairs of twins (双胞胎), who were first examined when they were already 60 years old. As Dr Jarvik continued the study of the twins into their 70s and 80s, their minds did not generally decline (衰弱) as was expected.
However, there was some decline in their psycho-motor speed. This means that it took them longer to finish mental tasks than it used to. But when speed was not a factor, they lost very little intellectual (智力的) ability over the years. In general, Dr Jarvik’s studies have shown that there is no decline in knowledge or reasoning ability. This is true not only with those in their 30s and 40s, but with those in their 60s and 70s as well.
It is true that older people themselves often complain that their memory is not as good as it once was. However, much of what we call “loss of memory” is not that at all. There usually was incomplete learning in the first place. For example, the older person perhaps had trouble hearing, or poor vision, or was trying to learn the new thing at too fast a speed. In the cases where the older person’s mind really seems to get worse, it is not necessarily a sign of decline due to old age. Often it is simply a sign of a sad emotional state.
【小题1】 This passage is mainly about _______.
| A．what caused mental decline |
| B．a new discovery about mental decline |
| C．the difference between middle-aged and older persons |
| D．how Dr Jarvik studied mental functioning of the twins |
| A．the study of diseases of the mind |
| B．the study of physical diseases |
| C．the study of twins’ growth |
| D．the study of human behavior |
| A．a worsening state of health | B．old age |
| C．nervous tension | D．a state of unhappiness |
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科目：高中英语 来源： 题型：阅读理解
In July 1994 Jupiter, the largest planet in our solar system, was struck by 21 pieces of a comet（彗星）. When the fragment（碎片）landed in the southern part of the giant planet, the explosions were watched by scientists here on earth. But what if our own planet was hit by a comet?
The year is 2094. It has been announced that a comet is heading towards the Earth. Most of it will miss our plant, but two fragments will probably hit the southern part of the Earth. The news has caused panic.
On 17 July, a fragment four kilometers wide enters the Earth’s atmosphere with a huge explosion. About half of the fragment is destroyed. But the major part survives and hits the South Atlantic at 200 times the speed of sound. The sea boils and an enormous wave is created and spreads. The wall of water rushes towards southern Africa at 800 kilometers an hour. Cities on the African coast are totally destroyed and millions of people are drowned. The wave moves into the Indian Ocean and heads towards Asia.
Millions of people are already dead in the southern part of the Earth, but the north won’t escape for long. Tons of broken pieces are thrown into the atmosphere by the explosions. As the sun is hidden by clouds of dust, temperatures around the world fall to almost zero. Crops are ruined. Wars break out as countries fight for food. A year later civilization has collapsed. No more than 10 million people have survived.
Could it really happen? In fact, it has already happened more than once in the history of the Earth. The dinosaurs（恐龙）were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believe that the Earth was hit by a space fragment. The dinosaurs couldn’t survive in the cold climate that followed and they became extinct. Will we meet the same end?
【小题1】Which of the following is NOT TRUE according to the author’s description of the disaster in 2094?
| A．The whole world becomes extremely cold. |
| B．All the coastal cities in African are destroyed. |
| C．The whole mankind becomes extinct. |
| D．The visit of the comet results in wars. |
| A．Because they could only live in the warm climate. |
| B．Because they once ruled the Earth. |
| C．Because their extinction shows future disasters. |
| D．Because dinosaurs and humans never live in the same age. |
| A．give an accurate description of the possible disaster in the future |
| B．prove that humans will sooner or later be destroyed |
| C．tell the historical development of the Earth |
| D．warn of a possible disaster in the future |
| A．terror story | B．news report |
| C．research paper | D．article of popular science |
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科目：高中英语 来源： 题型：阅读理解
WELLINGTON, September 19 (Xinhua) -- If your teenage son won't get out of bed in the morning, then take comfort from the fact that he might be sleeping his way to a healthier future, according to a new research from New Zealand.
Researchers in human nutrition at the University of Otago have found that teenage boys who sleep less have more body fat when compared to girls, for whom lack of sleep has no noticeable effect on their body fat ratios.
The study of 386 boys and 299 girls aged 15 to 18 found that average-sized 16-year-old boy weighing 69.5 kg and 176 cm tall, who slept for eight hours a day, had a waist size l.8 cm bigger and l.6 kg, or 9 percent, more body fat than the average-sized boy who slept 10 hours a day.
"The boys who slept eight hours a day would also have l.8 kg more lean (bone and muscle) mass compared to the boys who slept 10 hours, but that's only a 1.4-percent increase, compared to the 9- percent increase seen in body fat," said lead researcher from the Department of Human Nutrition, Dr. Paula Skidmore.
"Our results suggest that for older teenage boys, making sure that they get enough sleep may help to maintain a healthier body. It seems to be that, within reason, the more sleep the better for boys," Skidmore said in a statement Thursday.
"It was unexpected that we did not find the same result in girls, who may actually be more aware of their diet and more in tune with a healthier lifestyle."
The researchers ruled out the effects of food choice and number of screens, such as televisions, games and consoles, which the teenagers had in their bedrooms.
【小题1】What's the research really about?
| A．Boys and girls. | B．Food and weight. | C．Sleep and health. | D．Screens and fat. |
| A．Bigger waist and more fat in the body. |
| B．An increase in weight and height. |
| C．More concerned with their diet. |
| D．A decrease in bone and muscle. |
| A．girls usually sleep less and have healthier lifestyles than boys |
| B．the researchers expected to see the same result in girls |
| C．peoples' diet has a great effect on their health |
| D．boys are usually lazier than girls |
| A．Teachers. | B．Girls. | C．Parents. . | D．Boys. |
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科目：高中英语 来源： 题型：阅读理解
Life is to be enjoyed. There’s no point in giving up something you enjoy unless you get something back that’s even better. When people eat more healthfully, exercise, quit smoking, and manage stress better, they find that they feel so much better that it reconstructs the reason for making these changes from fear of dying to joy of living. The latest studies show that when you exercise and eat right:
YOUR BRAIN receives more blood flow and oxygen, so you become smarter, think more clearly, have more energy, and need less sleep. Two studies showed that just walking for three hours per week for only three months caused so many new neurons (神经细胞) to grow that it actually increased the size of people’s brains!
YOUR FACE receives more blood flow, so your skin glows more and wrinkles less. You look younger and more attractive. In contrast, an unhealthy diet, chronic emotional stress and smoking reduce blood flow to your face so you age more quickly. Smoking accelerates aging because nicotine causes your arteries (动脉) to narrow down, which decreases blood flow to your face and makes it wrinkle earlier. This is why smokers look years older than they really are.
YOUR GENES change. In May, a study was published in the Proceedings of the National Academy of Sciences showing that changing your lifestyle changes your genes.
YOUR TELOMERES (染色体端粒) get longer. Telomeres are the ends of our chromosomes (染色体) that control how long we live. As telomeres become shorter, then cells age more quickly, thus shortening your life.
Besides, one of the most interesting findings in the study was that the mothers’ awareness of stress was more important than what was really occurring in their lives. The researchers gave the women a questionnaire and asked them to rate on a three-point scale how stressed they felt each day, and how out of control their lives felt to them. The women who were aware that they were under heavy stress had significantly shortened and damaged telomeres compared with those who felt more relaxed. On the contrary, some of the women who felt relaxed despite raising a disabled child had more normal-appearing telomeres.
In other words, if you feel stressed, you are stressed; if you feel fine, you are fine.
【小题1】Which of the following are good for lengthening one’s life, according to the passage?
① eat healthy food ② drink plenty of water ③ take exercise ④ get up early
⑤ go to sleep early ⑥ release one’s stress
| A．①③⑥ | B．①②③ | C．①⑤⑥ | D．③④⑥ |
| A．your skin becomes white as there is plenty of sunshine |
| B．your skin becomes smooth as there is much blood in it |
| C．your skin looks pink as you are healthy |
| D．your skin becomes soft as you exercise enough |
| A．brains becoming cleverer | B．faces having fewer wrinkles |
| C．arteries turning narrower | D．genes being changed |
| A．mothers will have more damaged telomeres if they raise a disabled child |
| B．mothers don’t know how to handle stress effectively |
| C．some women were asked to fill out a questionnaire about educating children |
| D．mothers’ positive attitudes are the key to managing their stress |
| A．Eat better, live better | B．Feel better, live longer |
| C．Less stress, fewer diseases | D．Smoke more, age sooner |
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科目：高中英语 来源： 题型：阅读理解
Gray hair is simply a part of the normal aging process, and the rate you go silver is genetically predetermined. Going gray is not associated with earlier death, and premature graying is not, generally speaking, a sign of an illness or ill health in younger adults. There are, however, some specific health conditions associated with gray or white hair, but for most of us, going gray is just a fact of life.
Hair color comes from the pigment melanin(黑色素), which determines your individual shade. Hair without any melanin is pure white. The pigment is produced in cells called melanocytes, which inject pigment into the hair. At some point in everyone's lifetime, these cells slow down and eventually stop producing color. Scientists have yet to identify the exact mechanism by which melanocyte cell death occurs.
A study of more than 4,000 women and men from 20 countries determined that about 75% of people between the ages of 45 and 65 have some gray hair. In general, people of European descent gray earliest followed by Asians and Africans. It's interesting to note that a lucky 1 in 10 has no gray hair by retirement age. Beginning at age 30, your chances of having gray hair go up 10-20% per decade.
It may feel like you have more grays after a stressful event, but that's probably because middle age is basically a series of anxiety-ridden events. Between working, raising kids, and caring for older parents, the "sandwich" years of 45-65 can be stressful, especially for women. They are also when we naturally start to look older.
At this point, there is still no silver bullet to keep away the grays.
【小题1】What would be the best title for this passage?
| A．Going gray. | B．Tips to make hair color last |
| C．Why does hair turn gray? | D．Gray hair is in fashion. |
| A．Scientists have found out how to prevent hair from turning gray. |
| B．Europeans are more likely to gray than Asians and Africans. |
| C．Gray hair means poor health or a sign of illness. |
| D．Everyone will inevitably get gray hair by retirement age. |
| A．Being physically weak. | B．Stress from different sides. |
| C．Death of melanocyte cell. | D．Genetic factors. |
| A．Make-up | B．Scientific research. | C．Chemical weapon. | D．Cure. |
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科目：高中英语 来源： 题型：阅读理解
Cutting global warming pollution would not only make the planet healthier, it would make people healthier too, new research suggests.
Cutting carbon dioxide emissions could save millions of lives, mostly by reducing preventable deaths from heart and lung diseases, according to studies released Wednesday and published in a special issue of The Lancet British medical journal.
“Relying on fossil fuels leads to unhealthy lifestyles, increasing our chances for getting sick and in some cases takes years from our lives,” US Health and Human Services Secretary Kathleen Sebelius said in a telecast (电视广播) briefing from her home state of Kansas. “As greenhouse gas emissions go down, so do deaths from cardiovascular (心血管的) and respiratory diseases (呼吸疾病). This is not a small effect.”
Instead of looking at the health ills caused by future global warming, as past studies have done, this research looks at the immediate benefits of doing something about the problem, said Linda Birnbaum, director of the US National Institute of Environmental Health Sciences.
Some possible benefits seemed highly speculative (投机的，推测的), the researchers conceded (承认，给予), based on people driving less and walking and cycling more. Other proposals studied were more concrete and achievable, such as reducing cook stoves that burn dung (粪便), charcoal and other polluting fuels in the developing world.
And cutting carbon dioxide emissions also makes the air cleaner, reducing lung damage for millions of people, doctors said.
“Here are ways you can attack major health problems at the same time as dealing with climate change," said lead author Dr. Paul Wilkinson, an environmental epidemiologist at the London School of Hygiene and Tropical Medicine.
Wilkinson said the individual studies came up with numbers of premature deaths prevented or extra years of life added for certain places.
For example, switching to low-polluting cars in London and Delhi, India, would save 160 lost years of life in London and nearly 1,700 in Delhi for every million residents, one study found. But if people also drove less and walked or biked more, those extra saved years would soar (高耸，高涨) to more than 7,300 years in London and 12,500 years in Delhi because of less heart disease.
【小题1】What does the passage mainly about?
| A．How can people live longer. |
| B．Cutting carbon dioxide emissions saves life. |
| C．Global warming threatens people’s lives |
| D．People should stop relying on fossil fuels |
| A．it focuses on the immediate benefits of cutting carbon dioxide emissions |
| B．it studies the bad effects arising from future global warming |
| C．it is believed by most people |
| D．it mainly targets at developing countries |
| A．sometimes it takes years to see the bad effects caused by consuming fossil fuels |
| B．without greenhouse gas emissions, people would not die of cardiovascular and respiratory diseases |
| C．the main reason why people get sick is that they rely on fossil fuels |
| D．death from cardiovascular and respiratory diseases are closely related to greenhouse gas emissions |
| A．London and Delhi have already benefited from reducing greenhouse gas emissions |
| B．switching to low-polluting cars would save 160 lives in London every year |
| C．walking and biking instead of driving will reduce the chance of heart disease |
| D．attacking health problems and dealing with climate change are contradictory |
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科目：高中英语 来源： 题型：阅读理解
C
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.
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 fades away. Other nearby ants then detect 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. |
| A．Choe did this study in order to stop ants from invading new places. |
| B．Choe is a biologist who is only interested in animals, especially in ants. |
| C．Choe first came up with an idea to explain this ant behavior，and then did some tests to prove his theory. |
| D．Choe did the research on this ant behavior on his own. |
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