单选题The old couple were completely Udeceived/U by the liar's disguise.

单选题They had a far better yield than any other farm miles away around this year.

单选题Sport is not only physically challenging, but it can also be mentally challenging. Criticism from coaches, parents, and other teammates, as well as pressure to win can create an excessive amount of anxiety or stress for young athletes (运动员). Stress can be physical, emotional, or psychological and research has indicated that it can lead to burnout. Burnout has been described as dropping or quitting of an activity that was at one time enjoyable. The early years of development are critical years for learning about oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to cooperate with others, make friends, and gain other social skills that will be used throughout their lives. Coaches and parents should be aware, at all times, that their feedback to youngsters can greatly affect their children. Youngsters may take their parents and coaches criticisms to heart and find a flaw (缺陷) in themselves. Coaches and parents should also be cautious that youth sport participation does not become work for children. The outcome of the game should not be more important than the process of learning the sport and other life lessons. In today's youth sport setting, young athletes may be worrying more about who will win instead of enjoying themselves and the sport. Following a game many parents and coaches focus on the outcome and find fault with youngsters' performances. Positive reinforcement should be provided regardless of the outcome. Research indicates that positive reinforcement motivates and has a greater effect on learning than criticism. Again, criticism can create high levels of stress, which can lead to burnout.

单选题Salesmanship is the ability to{{U}} sway {{/U}}people to willingly buy products or support new ideas.

单选题According to the most recent research on parenting, caretakers tend to use three strategies for disciplining children. Power includes the use of physical punishment such as spanking or the threat of physical punishment, but parents can also demonstrate power by taking away a privilege such as using the ear, attending a sporting event, or in the case of a very young child, playing with a favorite toy. In spite of the fact that power strategies, especially severe physical punishment, can cause children to fear or even hate parents, it"s surprising that power remains the strategy used most often in disciplining children. It"s also worth noting that children who are harshly disciplined in this way tend to be hostile, defiant, and aggressive socially. Second in popularity after power is the withholding of affection. This can take the form of refusal to communicate with a child, threatening to abandon or reject the child, or otherwise treating children as though they were unworthy of love. Interesting enough, children disciplined in this way appear on the surface to be very self-disciplined, even model children who are seldom in trouble, but underneath, these same children are generally very nervous, insecure and dependent others to approve of and guide their evaluation of behavior. Finally, management techniques are employed for discipline. These begin with a set of rules that are clearly expressed at an age-appropriate level. To enforce the rules, parents use a combination of praise and approval with explanation and reasoning, always referring back to the rules. But regardless of the strategy, the behavior that has precipitated punishment should be clearly understood, and the consequences should be consistent. Key to any kind of discipline is a pattern of consistency so that children understand the relationship between the rules, their behavior, and the consequences.

单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 {{B}}Importance of Children's Oral Health{{/B}} February is National Children's Dental (牙齿的) Health Month, but in children good oral (口部的) care is critical every day. The first comprehensive study on the nation's oral health, released recently by the Office of the U. S. Surgeon General, calls dental and oral diseases a "silent epidemic (流行病)", even in children. The report states that more than 51 million school hours are lost each year to dental-related illness. In fact, a recent study pointed to dental care as the most common unmet health need among American children. To help counter this, the American Academy of Periodontology (牙周病学) (AAP) is launching an effort to educate children and parents about the prevention of dental diseases in children. "This is important because oral problems can impact self-esteem for children and lead to problems of eating, speaking and attending to learning," said Michael McGuire, president of the AAP. Common dental problems seen in children are cavities (龋洞) and gingivitis (龈炎),which are found in the majority of U. S. children. "When these problems are not caught early and treated, they can develop into more severe problems and cause unnecessary suffering," said McGuire. "However, much of the time, oral problems are avoidable problems." In the Rio Grande Valley in Texas, a group of more than 120 dentists (牙医) volunteers to deliver dental care to thousands of low-income children each year with its Mobile Dental Unit that travels from school to school. "According to the, Surgeon General's Report, about 37 percent of children have not had a dental visit before starting school," said McGuire. When children don't see dentists, they miss the opportunity to have problems caught early before they develop into larger, more expensive problems to treat, and parents miss the opportunity to learn how to promote good oral habits in their children."

单选题Davies is an official of the Saskatchewan Medical Society, so it's not surprising that he would want to extol Canadian medicine. But that feeling of patriotic pride in the nation's health - care system is something that just about all Canadians share. They love to point out that Canada provides coverage for everybody, usually with no copay and no deductible--while the U. S. leaves tens of millions of its citizens uninsured. They love to remind US that, while the U. S. lets some 700,000 people go bankrupt due to medical bills each year, the number of medicalbankruptcies in Canada is precisely zero. Almost all Canadians are proud of the fact thatA. Canada's health - care system covers every one of its citizens.B. many people go bankrupt each year due to medial bills.C. many people are not included in the health - care system.D. people have to wait for a long time for medical treatment.

单选题{{B}}第三篇{{/B}} Many science reports discuss medical studies that test the effect of a new drug. Usually, a large number of people is divided into two groups. Each group takes a different substance. But no one knows which group is getting which substance. One group takes the medicine being tested. Another group takes what we call an inactive substance. Medical researchers call this substance a "placebo." The word "placebo" is Latin for "I shall please." Placebo pills(宽心丸)usually are made of sugar. Using placebos to test drugs sometimes has a surprising result. Researchers say people taking the placebo often report improvements in their health. This is known as "the placebo effect"--pain that is eased or stopped by an inactive substance. In such testing, the drug must perform better than the placebo to prove that it is effective. Doctors have reported that the placebo effect can be used in treatment. For example, a doctor tells a patient that a new drug will stop the pain in his leg. The pill is only sugar. But the patient does not know that. He takes the pill and says his pain is gone. Scientists are beginning to discover some physical reasons for this reaction in some people. They are learning that much of what people believe to be true comes from what the brain expects is going to happen. If the brain believes a drug will ease pain, the brain may begin physical changes in the body that can cause the expected effect. A recent examination of studies on drugs for depression found that placebos eased the depression about as well as the active drugs. Other studies have explored the power of placebos. A study in Japan involved thirteenpeople who reacted to the poison ivy (常青藤)plant. Poison-ivy causes red itchy sores(伤痕)on some people who touch it. Each person was rubbed on one arm with a harmless leaf, but was told it was poison ivy. Each person was then touched on the other arm with poison ivy, but was told it was a harmless leaf. All thirteen people developed a reaction on the arm where the harmless leaf touched their skin. Only two reacted to the poison ivy leaves. Doctors and scientists worry that the use of placebos may not always be harmless. They say people can become victims of false doctors and others who use placebos to claim they can cure disease.

单选题Academic records cannot be Uduplicated/U.

单选题The doctors have abandoned the hope to rescue the old man.A. leftB. given upC. turned downD. refused

单选题In 2005 scientists in Spain reported that the more pesticides children were exposed to as fetuses (胚胎), the greater their risk of being overweight as toddlers. And last January scientists in Belgium found that children exposed to higher levels of PCBs and DDE ( the breakdown product of the pesticide DDT) before birth were fatter than those exposed to lower levels. Neither study proves causation, but they "support the findings in experimental animals," says Newbold. They "show a link between exposure to environmental chemicals...and the development of obesity. " In the paragraph the writer intends to convey to the reader thatA. there might be a link between exposure to environmental chemicals and the development of obesity.B. there is a cause - effect relation between exposure to environmental chemicals and obesity.C. children who are exposed to pesticides are likely to develop obesity in their adulthood.D. scientists have done experiments to see the link between environmental chemicals and obesity for years.

单选题The branch of the bank where she worked was not in the center of the city.A. divisionB. treeC. leafD. trunk

单选题Apparently in interviews he refuses to talk about his private life.A. familyB. personalC. miserableD. unhappy

单选题It would be hazardous to invest so much.

单选题God is believed to be omnipotent .

单选题 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}} WHO: Many Children's Deaths Preventable{{/B}} Over five million children die each year from disease, infections and accidents related{{U}} (1) {{/U}}their environment although many of these deaths are largely preventable, says the World Health Organization. On Monday, the WHO asked governments and citizens around the world to take action' to create healthy{{U}} (2) {{/U}}for children as it celebrated world Health Day. "The biggest threats to children's health lurk in the very{{U}} (3) {{/U}}that should be safest- home, school and community," said Dr. Gro Harlem Brundtland, director--general of the WHO at the day's launch in New Delhi. India. "Every child has the right to{{U}} (4) {{/U}}up in a healthy home. school and community. The future development of our children -- and of their world-- depends on{{U}} (5) {{/U}}enjoying good health now. We have their future in our{{U}} (6) {{/U}}. Now we must work more effectively together to{{U}} (7) {{/U}}the risks from the environment which our children face, "Bmndfland said. This year's theme, "Healthy Environments for Children" focuses on the many dangers{{U}} (8) {{/U}}by children in and around the places where they live and play. These include inadequate access to safe drinking{{U}} (9) {{/U}}and sanitation, insect-borne diseases, air pollution, chemical hazards and injuries from traffic, falls, bums and drownings. Communities around the world organized events to promote awareness of children's health issues{{U}} (10) {{/U}}included drawing contests for school children in Vietnam street plays in India, puppet shows in Namibia and professional lectures for policy makers in Germany and elsewhere. Activities also took{{U}} (11) {{/U}}in cities across Canada on Monday, including Calgary Montreal, Halifax and Ottawa. Although children under five represent only 10 per cent of the world's population, they bear 40 per cent of the global disease{{U}} (12) {{/U}}, says the WHO. And as much as one-third of the total burden of disease may be caused by environmental{{U}} (13) {{/U}}. World Health Day has been celebrated on April 7th{{U}} (14) {{/U}}1950. Each year the WHO chooses a theme to highlight areas of particular concern. Last year's{{U}} (15) {{/U}}More for Health, focused on promoting physical activity as part of healthy living. infection n.感染 sanitation n. (环境)卫生 hazard n. 危险,危害 drowning n.溺死 puppet n. 木偶

单选题About one million Americans are diagnosed Uannually/U with skin cancer.

单选题I feel {{U}}regret{{/U}} about what's happened.

单选题 A Gay BiologistMolecular biologist Dean Hamer has blue eyes, light brown hair and a good sense of humor. He smokes cigarettes, spends long hours in an old laboratory at the US National Institute of Health, and in his free time climbs up cliffs and points his skis down steep slopes. He also happens to be openly, matter-of-factly gay. What is it that makes Hamer who he is? What, for that matter, accounts for the talents and traits that make up anyone's personality? Hamer is not content merely to ask such questions: he is trying to answer them as well. A pioneer in the field of molecular psychology, Hamer is exploring the role of genes in governing the very core of our individuality. To a remarkable extent, his work on what might be called the gay, thrill-seeking and quit-smoking genes reflects how own genetic predispositions. That work, which has appeared mostly in scientific journals, has been gathered into an accessible and quite readable form in Hamer's creative new book, Living with Our Genes. "You have about as much choice in some aspect of your personality," Hamer and co-author Peter Copeland write in the introductory chapter, "as you do in the shape of your nose or the size of your feet". Until recently, research into behavioral genetics was dominated by psychiatrists and psychologists, who based their most compelling conclusions about the importance of genes on studies of identical twins. For example, psychologist Michael Bailey of Northwestern University famously demonstrated that if one identical twin is gay, there is about a 50% likelihood that the other will be too. Seven years ago, Hamer picked up where the twin studies left off, homing in on specific strips of DNA that appear to influence everything from mood to sexual orientation. Hamer switched to behavioral genetics from basic research, after receiving his doctorate from Harvard, he spent more than a decade studying the biochemistry of a protein that cells use to metabolize heavy metals like copper and zinc. As he was about to turn 40, however, Hamer suddenly realized he had learned as much about the protein as he cared to. "Frankly, I was bored," he remembers, "and ready for something new." Homosexual behavior, in particular, seemed ripe for exploration because few scientists had dared tackle such an emotionally and politically charged subject. "I'm a gay," Hamer says with a shrug, "but that was not a major motivation. It was more of a question of intellectual curiosity—and the fact that no one else was doing this sort of research."

单选题Water Pollution The demand for freshwater rises continuously as the world's population grows. From 1940 to 1990 ,withdrawal of fresh water from rivers, lakes, reservoirs, and other sources has increased fourfold. Of the water consumed each year,69 percent is used for agriculture,23 percent for industry, and 8 percent for domestic uses. Sewage, industrial wastes, and agricultural chemicals such as fertilizers and pesticides are the main causes of water pollution. In 1995,the US Environmental Protection Agency(EPA). reported that about 37 percent of the country's lakes and estuaries, and 36 percent of its rivers, are too polluted for basic uses such as fishing or swimming, during all or part of the year. In developing nations, over 95 percent of urban sewage is discharged untreated into rivers and bays, creating a major human health hazard. Water runoff carries fertilizing chemicals such as phosphates and nitrates from agricultural fields and yards into lakes, streams, and rivers. These combine with the phosphates and nitrates from sewage to speed the growth of algae, a type of aquatic plant. The water body may then become choked with decaying algae, which severely depletes the oxygen supply. This process can cause the death of fish and other aquatic life. Runoff also carries toxic pesticides and urban and industrial wastes into lakes and streams. Erosion, the wearing away of topsoil by wind and rain, also contributes to water pollution. Soil and silt washed from logged hillsides, plowed fields, or construction sites, can clog waterways and kill aquatic vegetation. Even small amounts of silt can eliminate desirable fish species. For example, when logging removes the protective plant cover from hillsides, rain may wash soil and silt into streams, covering the gravel beds that trout or salmon use for spawning. The marine fisheries supported by ocean ecosystems are an essential source of protein, particularly for people in developing countries; approximately 950 million people worldwide consume fish as their primary source of protein. Yet pollution in coastal bays, estuaries, and wetlands threatens fish stocks already depleted by over fishing. In 1989,260,000 barrels of oil was spilled from the oil tanker Exxon Valdez into Alaska's Prince William Sound, a pristine and rich fishing ground. In 1992 there were 8,790 reported spills in and around U.S. waters, involving 5.7 million liters(1.5 million gallons)of oil.