填空题 阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。 1. Mind and body are two parts of a complex organism controlled by the nervous system, which acts on information received from the senses. The way a person perceives and reacts depends on his mood, his state of health, his diet, his body temperature and his level of consciousness. 2. There is considerable evidence that every thought or emotion has some related physical effect, and that every change within the nervous system should have some psychological effect. Although the precise nature of these correlations is not always known, the view that body and mind are constantly interacting in some way is now accepted by most psychologists. 3. The relationship between mind and body is particularly apparent in emotional states, especially those of fear and anger. When a person is in the grip of a powerful emotion his body undergoes changes, just as it does when he is asleep, ill or under the influence of drugs or alcohol. Most people are familiar with such sensations as a dry mouth when they are nervous, or a racing heart when they are afraid or excited. Such physical changes can be measured, for instance, by recording pulse rate and breathing, or by measuring the dilation of the pupils of the eyes. 4. a particularly sensitive measure of bodily change during periods of emotion is the galvanic skin response(GSR). This is used in the instrument known as the lie detector. The GSR depends on the fact that some mental activity produces bodily changes, such as sweating, which affect the skin's resistance to electricity. To measure GSR, electrodes are placed on the palm and on the back of the hand, and a weak current is passed between the electrodes. Changes in the current are recorded in an amplified form, often by means of an automatically controlled pen on moving paper. Other recordings, for instance of pulse, blood pressure and breathing, can be made simultaneously, by an instrument called a polygraph. 5. The galvanic skin response method has proved a very efficient indicator of general psychological arousal. Even slight embarrassment will cause a defection of the recording pen.

填空题A. visibility is reducedB. all of the effects of pollution on the human bodyC. pollution is not controlledD. who is responsible for itE. man's behaviorF. more money should be spent in solving the problem

填空题Okinawans (日本冲绳) continue to practice martial arts, ride bicycles, dance, garden, walk, and fish well into theft old age, which helps keep them looking and feeling healthy. They have relaxed schedules, which reduces their stress levels. And they pay attention to their spirituality and their inner selves through prayer and meditation.A. Okinawans living in Brazil and eating a typical Brazilian diet rich in red meat have a life expectancy 17 years lower than that of their countrymen in Okinawa.B. Each of these behaviors is an important piece of the Okinawan formula for health andlongevity.C. The Okinawan diet consists mostly of vegetables and whole grains.D. But Okinawans enjoy riches of a different kind--they have the longest life--expectancy rate in the world.E. So what is the secret to the Okinawans' health and longevity?F. In fact, compared to the United States, Okinawa's death rate for coronary heart disease is 80% lower.

填空题 下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复京章原貌。 {{B}}How Did She Conquer the Americans?{{/B}} African-American talk show queen Oprah Winfrey is the world's most powerful celebrity, according to Forbes magazine.{{U}} (46) {{/U}} Winfrey, 51, draws 30 million viewers weekly in the United States. Her talk show reaches 112 countries. She earned US$225 million over the past 12 months to rank second in celebrity riches. The annual Forbes list gives most weight to annual earnings.{{U}} (47) {{/U}} "After 21 years, her exciting chat show still rules the airwaves. It created new celebrities and hundreds of millions of dollars in profits," the magazine said. Winfrey is most popular with her popular talk show "The Oprah Winfrey Show". She can always attract the superstars and let them open up to her intimate interviewing style. Last month, American actor Tom Cruise, 42, surprised fans when he celebrated his new romance with 26-year-old actress Katie Holmes. He jumped up and down, shouting "rm in love." Only a few years ago, Cruise and his ex-wife Nicole Kidman appeared separately on the same show telling the' news of their divorce.{{U}} (48) {{/U}} Winfrey's approach appears to be simple. She is in pursuit of self-improvement and self-empowerment (自强). This has proved to be just what people, especially women, want. Winfrey often talks about her personal secrets on her show. That pulls in viewers. For example, she revealed that she had been sexually abused as a child, and has spoken freely of her struggle with her weight. Winfrey was born to a poor family in Mississippi in 1954.{{U}} (49) {{/U}}At the age of 19, she became the youngest person and the first African-American woman to anchor (主持) a news programme. Her success has not just been on the screen. Her media group includes a women's TV network and websites for women. Winfrey's work has extended to social change.{{U}} (50) {{/U}} She testified before the US Senate to establish a national database of dangerous child abusers. President Bill Clinton later signed "Oprah Bill" into law.A．But it also looks at the celebrity's presence on the Internet and in the media.B．In 1991, she did a lot of work for the National Child Protection Act.C．She was not a very successful woman.D．She began broadcasting while still at high school.E．It placed Winfrey at the top of its annual ranking of the 100 people last week.F．The couple had been tight-lipped about their break-up.

填空题Leukemia Leukemia is the most common type of cancer kids get, but it is still very rare. Leukemia involves the blood and blood-forming organs, such as the bone marrow. (1) A. kid with leukemia produces lots of abnormal white blood cells in the bone marrow. Usually, white blood cells fight infection, but the white blood cells in a person with leukemia don't work the way they're supposed to. (2) The abnormal white blood cells multiply out of control, filling the bone marrow and making it hard for enough normal, infection-fighting white blood cells to form. Other blood cells — such as red blood cells ( that carry oxygen in the blood to the body's tissues) and platelets (that allow blood to clot) — are also crowded out by the white blood cells of leukemia. These cancer cells may also move to other parts of the body, including the bloodstream, where they continue to multiply and build up. Although leukemia can make kids sick, most of the time it is treatable, and kids get better. Almost all leukemia patients are treated with chemotherapy, which means using anti-cancer drugs. (3) Chemotherapy quickly goes to work, traveling through the blood to the bone marrow. There, the drugs can attack the cancer cells. After several weeks of chemotherapy, many kids begin to feel better. Some children with leukemia will also have to have radiation therapy, too. (4) If the cancer isn't getting better from using the usual amounts of chemotherapy and radiation, then a kid with leukemia will probably need more treatment — with higher doses of chemotherapy and radiation to finally kill the cancer cells. But this heavy-duty treatment will also harm the normal cells in the kid's bone marrow too, and the bone marrow will no longer be able to produce normal blood cells. So, doctors will then give a kid — or anyone else with bone marrow that is no longer working — normal bone marrow tissue from someone else who is healthy. (5) A. The chemotherapy drugs are given through a catheter, a narrow tube that is inserted into a blood vessel, sometimes in the kid's upper chest. B. Early symptoms of leukemia are often overlooked, since they may resemble symptoms of the flu or other common diseases. C. This is a special procedure called a bone marrow transplant, and it helps the patient make new blood cells so they can recover from the leukemia. D. Bone marrow is the innermost part of some bones where blood cells are first made. E. They don't protect the person from infections very well. F. Radiation therapy uses invisible high-energy waves (similar to X-rays) to kill cancerous cells.

填空题下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。 Evolution of Sleep Sleep is very ancient. In the electroencephalographic (脑电图)sense we share it with all the primates (灵长类)and almost all the other mammals(哺乳动物) and birds. {{U}}(46) {{/U}} There is some evidence that the two types of sleep, dreaming and dreamless, depend on the life-style of the animal. Predators (捕食者) are much more likely to dream than prey. {{U}}(47) {{/U}} In dream sleep, the animal can't move and remarkably unresponsive to external stimuli(外部刺激).{{U}} (48) {{/U}} The fact that deep dream sleep is rare among prey today seems clearly to be a product of natural selection, and it makes sense that today, when sleep is highly evolved, the stupid animals are less frequently immobilized(不能动) by deep sleep than the smart ones. But why should they sleep deeply at all? Why should a state of such deep immobilization ever have evolved? {{U}}(49) {{/U}} Wilse Webb of the University of Florida and Ray Meddis of London University have suggested this to be the case. It is conceivable that animals who are too stupid to be quiet on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. {{U}} (50) {{/U}} This is an interesting notion and probably at least partly true. A. The point seems particularly clear for the young of predatory animals. B. Dreamless sleep is much shallower, and we have all witnessed cats or dogs cocking their ears to a sound when apparently fast asleep. C. While prey are in turn much more likely to experience dreamless sleep. D. Could it be that, rather than increasing an animal's vulnerability(易受伤), the function of sleep is to decrease it? E. It may extend back as far as the reptiles(爬行类动物). F. Human being is likely to dream.

填空题A. many vaccinesB. prevent diseasesC. health educationD. healthy behaviorE. change unhealthy behaviorF. other health services.

填空题Air Transportation 1. Airplanes are used to carry passengers, cargo and mail. Air transport companies operate scheduled airlines and non-scheduled services over local, regional, national, and international routes. The aircraft operated by these companies range from small single-engine planes to large multiengine jet transports. 2. The first air passenger services began in 1910,when dirigibles began operation between several German cities. The first scheduled airplane service to carry passengers began in the U.S. in 1914. Several experimental airmail flights took place in India. Europe,and the United States before World War I,but air transport services did not become a true business until after the war. 3. During World War Two,intercontinental air transport became firmly established. After the war the new long-distance transports with advanced facilities were increasingly able to avoid storms and strong wind and make flights more economical and consistent. A new generation of "jumbo-jet" transports began operations in 1970,and the supersonic transport entered passenger service in 1976. 4. During the 1970s the number of domestic passengers on U. S. airlines increased about 78% ,and during the 1980s the figure was up about 58%. In 1990 there were 41.8 million international passengers,the figure was a 75% increase over 1980. The total cargo flown by U. S. airlines almost doubled during the 1980s,from 5.7 billion to 10.6 billion ton-miles in 1990. 5. Major airports provide a wide range of facilities for the convenience of millions of travellers. These range from such basic services as ticket-sales counters and restaurants to luxury hotels,shopping centres and play areas for children. International airports must also have customs areas and currency-exchange counters and so on.A. Airport servicesB. Training of pilotsC. Beginning periodD. Rapid growth in the U. S.E. DevelopmentF. Competition

填空题A. The future of EnglishB. The speed of the spread of EnglishC. The role played by culture and the netD. The role played by military expansionE. The role played by educationF. The 2,000 years of English

填空题American Dreams There is a common response to America among foreign writers: the US is a land of extremes where the best of things are just as easily found as the worst. This is a cliche(陈词滥调). In the land of black and white, people should not be too surprised to find some of the biggest gaps between the rich and the poor in the world. But the American Dream offers a way out to everyone. 1 No class system or government stands in the way. Sadly, this old argument is no longer true. Over the past few decades there has been a fundamental shift in the structure of the American economy. The gap between the rich and the poor has widened and widened. 2 Over the past 25 years the median US family income has gone up 18 per cent. For the top 1 per cent, however, it has gone up 200 percent. Twenty-five years ago the top fifth of Americans had an average income 6.7 times that of the bottom fifth. 3 Inequalities have grown worse in different regions. In California, incomes for lower class families have fallen by 4 per cent since 1969. 4 This has led to an economy hugely in favor of a small group of very rich Americans. The wealthiest 1 per cent of households now control a third of the national wealth. There are now 37 million Americans living in poverty. At 12.7 per cent of the population, it is the highest percentage in the developed world. Yet the tax burden on America"s rich is falling, not growing. 5 There was an economic theory holding that the rich spending more would benefit everyone as a whole. But clearly that theory has not worked in reality. A. Nobody is poor in the US. B. The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980. C. For upper class families they have risen 41 per cent. D. Now it is 9.8 times. E. As it does so, the possibility to cross that gap gets smaller and smaller. F. All one has to do is to work hard and climb the ladder towards the top.

填空题The Paper Chase 1. "Running a house is a lot like running a business, " says Stephanie Denton, a professional organizer based in Cincinnati, Ohio, who specializes in both residential and commercial paperwork and record keeping. To get a successful grip on organizing documents, bills, and other materials, Denton suggests the following tips: 2. Create a space in which you can always do your paperwork. This is perhaps the most important element of a successful system. If you can't devote an entire desk to the task, at least invest in a rolling file cart to store active paperwork and a two-drawer file cabinet for family records. Store the rolling file cart wherever it is most convenient and comfortable to do your work, whether that is the kitchen, office, or family room. 3. When in doubt, throw it out. The first step for implementing a workable filing system is to eliminate paper you don't use, don't need, or that you could easily access again elsewhere. Throw out duplicate statements, old catalogs, and all of the coupons, mailings, or offerings you'll never have an opportunity to use or even read. 4. Set aside two days a month to pay bills. If a monthly due date doesn't fit into your cycle, call up the creditor and suggest a more convenient date. Keep two manila folders at the front of your system for current bills — one to correspond with each bill-paying day — and file all incoming bills. Keep a list in the front of each folder of what needs to be paid in case the invoice never arrives or gets misplaced. 5. Think of your filing system not as a rigid tool, but as a living, breathing system that can accommodate your changing needs. A good filing system is both mentally and physically flexible. Everyone's needs are different, says Denton, but when devising a filing system, ask yourself: "Where would I look for this? " Create main headings for your filing system, such as Investments,

填空题 阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第1—4段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。 {{B}}The Drink Your Body Needs Most{{/B}}1 Our bodies are estimated to be about 60 to 70% water. Blood is mostly water, and our muscles, lungs, and brain all contain a lot of water. Water is needed to regulate body temperature and to provide the means for nutrients (滋养物) to travel to all our organs. Water also transports oxygen to our cells, removes waste, and protects our joints and organs.2 We lose water through urination (腓尿), respiration (呼吸), and by sweating. If you are very active, you lose more water than if you do not take much exercise. Symptoms of mild dehydration (脱水) include chronic pains in joints and muscles, lower back pain, headaches, and constipation (便秘). A strong smell to your urine, along with a yellow color indicates that you are not getting enough water. Thirst is an obvious sign of dehydration and in fact, you need water long before you feel thirsty.3 A good rule of thumb (好的做法) is to take your body weight in pounds and divide that number in half. That gives you the number of ounces (盎司) of water per day that you need. For example, if you weigh 160 pounds, you should drink at least 80 ounces of water per'day. If you exercise you should drink another 8-ounce glass of water for every 20 minutes you are active. If you drink coffee or alcohol, you should add at least an equal amount of water. When you are traveling on an airplane, it is good to have 8 ounces of water for every hour you are on board the plane.4 It may be difficult to drink enough water on a busy day. Be sure you have water handy at all times by keeping a bottle for water with you when you are working, traveling, or exercising. If you get bored with plain water, add a bit of lemon for a touch of flavor. There are some brands of flavored water available, but some of them have sugar or artificial sweeteners that you don't need.

填空题The Value of Motherhood In shopping malls, the assistants try to push you into buying "a gift to thank her for her unselfish love". When you log onto a website, a small pop-up invites you to book a bouquet for her. Commercial warmth and gratitude are the atmosphere being spread around for this special Sunday in May. (46) . The popularity of Mother's Day around the world suggests that Jarvis got all she wanted. In fact, she got more enough to make her horrified. (47) . They buy, among other things, 132 million cards. Mother's Day is the No. 1 holiday for flower purchases. Then there are the various commodities, ranging from jewelry and clothes to cosmetics and washing powder that take advantage of the promotion opportunities. Because of this, Jarvis spent the last 40 years of her life trying to stop Mother's Day. One protest against the commercialization of Mother's Day even got her arrested for disturbing the peace, interestingly. (48) .As Ralph Fevre, a reporter at the UK newspaper The Guardian, observe, traditionally "motherhood is something that we do because we think it's right." But in the logic of commercialism, people need something in exchange for their time and energy. A career serves this purpose better. (49) So they work hard and play hard. Becoming a mother, however, inevitably handicaps career anticipation. (50) . According to the Guardian, there are twice as many child-free young women as there were a generation ago. Or, they put off the responsibility of parenting until later in their lives. So, Fevre writes that the meaning of celebrating Mother's Day needs to be updated: "It is to persuade people that parenting is a good idea and to honor people for their attempt to be good people."A. The American version of Mother's Day was thought up as early as 1905, by Anna Jarvis, as a way of recognizing the real value of motherhood.B. But what's more, commercialism changes young people's attitude towards motherhood.C. Obviously, the best girl will be a phone call or a visit.D. According to a research by the US card company Halhnark, 96 percent of American consumers celebrate the holiday.E. As a result, motherhood has suffered a huge drop in status since the 1950s.F. In addition, women are being encouraged to pursue any career they desir

填空题Crop Circle Mysteries They are giant geometric patterns, which appear over-night in a field of crops. Many people believe that they are made by aliens. 31 "Crop circle", as the mysterious patterns are called, became a hot phrase this month. 32 It"s believed to be the world"s first three-dimensional crop circle. The giant crop circle gives an impression of looking down on skyscrapers from above. 33 Crop circles were first widely noticed in the late 1970s as many mysterious circles began appearing in crop fields throughout the English countryside. People were intrigued by these giant patterns. They were huge (at least tens of meters in diameters) and popped up over-night. 34 Various scientific and pseudo-scientific explanations were put forward to explain the phenomenon. Some hold that they were left by alien spaceships. Others say that they are simply an elaborate prank. 35 To date, thousands of circles have been discovered all over the globe, from the former Soviet Union to Japan to Canada. A. A strange pattern 360 feet (110 meters) in diameter was discovered earlier this month in a wheat field in Oxfordshire, England. B. Others call them hoaxes. C. No one knew how or by whom they were made. D. The design"s discovery immediately generated a new tide of public interest in this mysterious phenomenon. E. Farmers often make crop circles for fun. F. But rather than discovering the truth, people saw increasingly complicated circles appear worldwide.

填空题Parkinson's Disease 1. Parkinson's disease affects the way you move. It happens when there is a problem with certain nerve cells in the brain. Normally, these nerve cells make an important chemical called dopamine (多巴胺). Dopamine sends signals to the part of your brain that controls movement. It lets your muscles move smoothly and do what you want them to do. When you have Parkinson's, these nerve cells Break down. Then you no longer have enough dopamine, and you have trouble moving the way you want to. 2. No one knows for sure what makes these nerve cells break down. But scientists are doing a lot of research to look for the answer. They are studying many possible causes, including aging and poisons in the environment. Abnormal genes seem to lead to Parkinson's disease in some people. But so far, there is not enough proof to show that it is always inherited. 3. Tremor (颤抖) may be the first symptom you notice. It is one of the most common signs of the disease, although not everyone has it. Tremor often starts in just one arm or leg or only on one side of the body. It may be worse when you are awake but not moving the affected arm or leg. It may get better when you move the limb or you are asleep. In time, Parkinson's affects muscles all through your body, so it can lead to problems like trouble swallowing or constipation (便秘). In the later stages of the disease, a person with Parkinson's may have a fixed or blank expression, trouble speaking, and other problems. Some people also have a decrease in mental skills. 4. At this time, there is no cure for Parkinson's disease. But there are several types of medicines that can control the symptoms and make the disease easier to live with. You may not even need treatment if your symptoms are mild. Your doctor may wait to prescribe medicines until your symptoms start to get in the way of your daily life. Your doctor will adjust your medicines as your symptoms get worse. You may need to take several medicines to get the best results. A. Tips for Patients with the Disease B. Common Treatment for the Disease C. Means of Diagnosis of the Disease D. Typical Symptoms of the Disease E. Possible Causes of the Disease F. Definition of Parkinson's Disease

填空题 阅读下面的短文，文章中有5处空白，文章后有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有的位置，以恢复文章原貌。请将答案填在相应的横线上。 {{B}} Why do People Shrink?{{/B}} Did you ever see the movie Honey, I shrunk the kids? It's about a wacky dad (who's also a scientist) who accidentally shrinks his kids with his homemade miniaturizing invention. Oops!{{U}} (1) {{/U}}. For older people, shrinking isn't that dramatic or sudden at all. It takes place over years and may add up to only one inch or so off of their adult height (maybe a little more, maybe less), and this kind of shrinking can't be magically reversed, although there are things that can be done to stop it or stow it down.{{U}} (2) {{/U}}. There are a few reasons. As people get older, they generally lose some muscle and fat from their bodies as part of the natural aging process. Gravity (the force that keeps your feet on the ground) take hold, and the bones in the spine, called vertebrae, may break down or degenerate, and start to collapse into one another.{{U}} (3) {{/U}}But perhaps the most common reason why some older people shrink is because of osteoporosis. Osteoporosis occurs when too much spongy bone tissue (which is found inside of most bones) is broken down and not enough new bone material is made.{{U}} (4) {{/U}}Bones become smaller and weaker and can easily break if someone with osteoporosis is injured. Older people--especially women, who generally have smaller and lighter bones to begin with--are more likely to develop osteoporosis. As years go by, a person with osteoporosis shrinks a little bit. Did you know that every day you do a shrinking act? You aren't as tall at the end of the day as you are at the beginning. That's because as the day goes on, water in the disks of the spine gets compressed (squeezed) due to gravity, making you just a tiny bit shorter. Don't worry, though.{{U}} (5) {{/U}}. A.They end up pressing closer together, which makes a person lose a little height and become shorter. B. Once you get a good night's rest, your body recovers, and the next morning, you're standing tall again. C. Over time, bone is said to be lost because it's not being replaced. D. Luckily, there are things that people can do to prevent shrinking. E. The kids spend the rest of the movie as tiny people who are barely visible while trying to get back to their normal size. F. But why does shrinking happen at all?

填空题1. Mind and body are two parts of a complex organism controlled by the nervous system, which acts on information received from the senses. The way a person perceives and reacts depends on his mood, his state of health, his diet, his body temperature and his level of consciousness. 2. There is considerable evidence that every thought or emotion has some related physical effect, and that every change within the nervous system should have some psychological effect. Although the precise nature of these correlations is not always known, the view that body and mind are constantly interacting in some way is now accepted by most psychologists. 3. The relationship between mind and body is particularly apparent in emotional states, especially those of fear and anger. When a person is in the grip of a powerful emotion his body undergoes changes, just as it does when he is asleep, ill or under the influence of drugs or alcohol. Most people are familiar with such sensations as a dry mouth when they are nervous, or a racing heart when they are afraid or excited. Such physical changes can be measured, for instance, by recording pulse rate and breathing, or by measuring the dilation of the pupils of the eyes. 4. a particularly sensitive measure of bodily change during periods of emotion is the galvanic skin response(GSR). This is used in the instrument known as the lie detector. The GSR depends on the fact that some mental activity produces bodily changes, such as sweating, which affect the skin's resistance to electricity. To measure GSR, electrodes are placed on the palm and on the back of the hand, and a weak current is passed between the electrodes. Changes in the current are recorded in an amplified form, often by means of an automatically controlled pen on moving paper. Other recordings, for instance of pulse, blood pressure and breathing, can be made simultaneously, by an instrument called a polygraph. 5. The galvanic skin response method has proved a very efficient indicator of general psychological arousal. Even slight embarrassment will cause a defection of the recording pen.

填空题 阅读下面的短文，文章中有5处空白，文章后面有6组文字，请根据文章的内容选择 5组文字，将其分别放回文章原有位置，以恢复文章原貌。 {{B}}Lowering the Risk of Heart Disease{{/B}} Like millions of other Americans, I come from a family with a history of heart disease. My father had his first three heart attacks when he was only thirty-one.{{U}} (46) {{/U}}I grew up with heart disease. It was there, but I didn't take it seriously. When I was thirty-one, my blood cholesterol (胆固醇) level was measured for the first time. It was 311 mg/dl, the doctor told me — an extremely high level that put me at a very high risk of heart disease, especially with my family history. He sent me to the National Institutes of Health (NIH) to be screened for participation in a clinical trial.{{U}} (47) {{/U}}At NIH, physicians explained the degree of risk associated with my blood cholesterol level and the nature of the experiment. This test involves putting a tube through a leg artery (动脉) up to the heart.{{U}} (48) {{/U}}Learning about the risks of the experiment as well as the risk associated with my raised blood cholesterol level scared the life out of me. Although I was excluded from participating in the study, the experience may well have saved my life. For the first time, I began to realize the seriousness of high blood cholesterol.{{U}} (49) {{/U}}But equally important, I got a taste of what it is like to be a patient, to have tests done on me and to think of myself as sick. This was hard to take. This experience taught me two lifesaving lessons. First, although I felt fit and strong, I was actually at high risk for heart disease because of my high blood cholesterol level. And with my family history, it could not be ignored.{{U}} (50) {{/U}}A．The death rate for the test was only 1 in 100, I was assured.B．Second, I could lower my blood cholesterol level simply by changing what I ate.C．I was three years old at that time.D．There is not enough oxygen in the blood.E．It was a heart attack just waiting to happen.F．The trial was designed to test the effect of lowering blood cholesterol on the risk of heart disease.

填空题UV Light Causes Skin Cancer Don't laugh if you hear about kids hiding in their basement this summer. They might have been frightened by a recent report from Europe that liquid sunscreens don't protect people from the sun's harmful rays. Researchers kept track of 631 children, some of whom used sunscreen and (46) . The researchers found that the kids who used sunscreen got more sun-caused moles than did the kids who didn't use sunscreen. Kids with sun-caused moles are more likely to develop skin cancer later in life. Did sunscreen harm the children? Probably not, the researchers concluded. They believe that the children relied too much on their sunscreen and stayed in the sun too long. Sunscreen is still safe to use, say skin experts, as long as it is used sensibly. Solar Cares Using sunscreen sensibly is more important than ever. Why? Skin experts like Martin Weinstock believe that (47) . Earth's ozone layer appears to be getting thinner. Ozone is a gas. In the upper atmosphere, ozone blocks much of the sun's harmful ultraviolet (UV) radiation. Polluting chemicals are thought to be destroying the ozone in some places. Even though the world's wealthy countries agreed to stop making polluting chemicals a few years ago, ozone is still disappearing. And that's bad news, skin experts say, because UV light causes skin cancer, and skin cancer is the most common kind of cancer in the United States. More than a million new cases of skin cancer are showing up in the United States every year. Scientists are looking at kids to reverse that trend. Why? Because getting too much sun when you're a kid seems to set the stage for getting skin cancer when (48) . According to Weinstock, three-quarters of all skin cancers might never develop if people under the age of 18 avoided overexposure to the sun. Glaring Facts What happens when skin meets sun? Light rays, which come in varying wavelengths, strike the skin. Visible light consists of wavelengths (49) . Ultraviolet light consists of waves too short to be seen. UV light comes in several varieties, among them UVB and UVA. UVB wavelengths are slightly shorter than UVA wavelengths. Scientists once thought that UVB light was harmful and that UVA light produced a healthful tan. But opinions have changed. Scientists still agree that UVB light causes sunburns. But now they suspect that both kinds of UV light damage the DNA of cells. Moreover, scientists believe that either UVA light or UVB light or both weaken the body's disease-fighting immune system. The body becomes less capable of repairing damaged cells, and such cells may go on to divide uncontrollably. In other words, (50) Three Little Words To help people avoid getting harmed by the sun, the American Cancer Society has summed up its advice in three words: Slip, Slop and Slap. The words are short for "Slip on a shirt! Slop on the sunscreen! Slap on a hat!"A. they may become cancerousB. people can seeC. you're olderD. UVA is different from UVBE. sunlight is growing more hazardousF. some of whom didn't

填空题Ebola Outbreak 1 You are likely aware that several countries in West Africa are battling an Ebola outbreak. Ebola is a dangerous and often lethal viral infection. Scientists believe that humans contracted the virus by eating the meat of rare animals. It is now believed that bats are the primary carriers of the virus. 2 To date, there are only three major countries in West Africa experiencing a major outbreak: Sierra Leone, Liberia and Guinea. However, other countries such as Nigeria have reported confirmed cases of Ebola within their borders. 3 Unless you recently visited one of the three affected West countries, your risk of contracting the virus is virtually zero. Unlike other recent airborne virus outbreaks like SARS, the Ebola virus can only be spread through direct contact with an infected person. Specifically, Ebola is spread through contact with body fluids. Though the virus is transmittable, only an infected person exhibiting symptoms is communicable. 4 The signs and symptoms of Ebola are non-specific and patients typically exhibit them after a week of contracting the virus. Symptoms may appear as early as two days or as late as three weeks after initial infection. Symptoms include disgust, weakness and stomach pain. More uncommon symptoms include chest pain, bleeding and sore throat. 5 Ebola is devastating because of its ability to attack and replicate in every organ of the body. This causes an overstimulation of the body"s inflammatory response, causing the flu-like symptoms. The virus also causes bleeding and impairs the body"s normal clotting mechanism (凝血机制), making bleeding even more severe. Loss of blood volume and decreased organ perfusion (器官灌注) ultimately lead to organ failure and death. 6 The current outbreak is the deadliest viral outbreak in over 35 years. While diseases such as the malaria (疟疾) are far more communicable, Ebola is one of the world"s most fatal viral infections. Ebola"s fatality rate exceeds that of SARS.