单选题The mail was delayed for a week because of the flood.A. held inB. held onC. held offD. held down

单选题His new girlfriend had {{U}}omitted{{/U}} to tell him that she was married. A. failed B. deleted C. refused D. rejected

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}}What Is Cancer?{{/B}} Cancer is actually a group of many related diseases that all have to do with cells. Cells are the very small units that make up all{{U}} (51) {{/U}}things, including the human body. There are billions of cells{{U}} (52) {{/U}}each person's body. Cancer happens when cells that are not normal grow{{U}} (53) {{/U}}spread very fast. Normal body cells grow and divide and know when to stop growing. Over time, they also die.{{U}} (54) {{/U}}these normal cells, cancer cells just continue to grow and divide out of control and don't die. Cancer cells usually group together to form tumors A growing tumor becomes a lump of cancer cells{{U}} (55) {{/U}}can destroy the normal cells around the{{U}} (56) {{/U}}and damage the body's healthy tissues. This can make someone very{{U}} (57) {{/U}}. Sometimes cancer cells break away from the original tumor and travel to other areas of the{{U}} (58) {{/U}}, where they keep growing and can go on to form new tumors. This is how cancer{{U}} (59) {{/U}}. The spread of a tumor to a new place in the body is{{U}} (60) {{/U}}metastasis (转移). People with cancer may feel pretty sick at times--but can usually still do lots of normal things.{{U}} (61) {{/U}}they are very sick, kids and teenagers with cancer may still be able to go to school. They may be tired or bruise (出现青肿) easily, but they {{U}} (62) {{/U}}sometimes go to camp, movies, and sleepover (在外过夜的) parties. People with cancer still like the same things they did{{U}} (63) {{/U}}they got sick. Cancer in kids is rare--but today, many kids who do get cancer go on living normal lives. The number of kids who beat cancer goes{{U}} (64) {{/U}}every year because of new cancer treatments. So a lot of kids with cancer will some day drive cars, go to college, have careers, and even get{{U}} (65) {{/U}}and have families of their own.

单选题At that time, we did not fully grasp the significance of what had happened.

单选题Diabetes (糖尿病) and Eye Damage Over 2 million Canadians have diabetes. It is the leading cause of blindness in North Americans under 65 years of age. Diabetes is a condition where the body either cannot produce enough insulin (胰岛素) or cannot respond properly to insulin. Insulin is important because it moves glucose (葡萄糖), a simple sugar, to the body"s cells from the blood. The food people eat provides the body with glucose, which is used by the cells as a source of energy. If insulin isn"t available or doesn"t work correctly to move glucose from the blood into the cells, glucose will stay in the blood, leading to high blood sugar levels. High blood sugar levels damage the blood vessels, including the tiny blood vessels in the eye. This leads to an eye disease known as diabetic retinopathy (糖尿病型视网膜病). The retina (视网膜) is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy, some blood vessels in the retina are lost, and some of the other blood vessels begin to "leak" blood. This causes the retina to swell, and gradually cuts off its supply of oxygen and nutrients (滋养物 ). Eventually, the retina starts to grow new blood vessels to replace the damaged ones. Unfortunately, these new vessels are not as strong as the old ones. They are more likely to break, causing bleeding in the eye. At first, people with diabetic retinopathy will not notice any symptoms. As the disease gets worse, they may notice blurred (模糊地) vision, black spots or flashing lights. As time goes on, it can progress to blindness. Everyone with diabetes is at risk for diabetic retinopathy, and the risk increases the longer you"ve had diabetes. Fortunately, you can reduce your risk. If you do not have diabetes, but think you may be at risk for this condition, visit your doctor to be screened for diabetes. If you do have diabetes: · Have frequent eye check-ups. · Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage. ·If you have high blood pressure, follow your recommended diet and medications to keep it under control. If you are not sure whether you have high blood pressure, or whether your blood pressure is under control, discuss this with your doctor.

单选题Although a newspaper's primary function is to inform,special features are usually included for entertainment.

单选题Malnutrition "Much of the sickness and death attributed to the major communicable diseases is in fact caused by malnutrition which makes the body less able to withstand infections when they strike", said Dr. Hiroshi Nakajima, Director-General of the World Health Organization (WHO), in his statement on the first day of the World Food Summit organized by the Food and Agriculture Organization of the United Nations in Rome, Italy, from 13 to 17 November, 1996. "At the same time," he added, "in developing countries today, malnutrition is the cause of 174 million children under five years of age being underweight, and 230 million being stunted in their growth." Such figures represent deprivation, suffering and wasted human potential on a scale that is unacceptable from every point of view. Whether we think in terms of humanitarian concern, common justice or development needs, they demand a response, both from national governments and from international community. " At the end of January 1996, 98 countries had national plans of action for nutrition and 41 countries had one under preparation, in keeping with their commitments made at the International Conference on Nutrition in Rome in December 1992. The global situation, however, remains grim. Over 800 million people around the world still cannot meet basic needs for energy and protein, more than 2,000 million people lack essential micronutrients, and hundreds of millions suffer from diseases caused by unsafe food and unbalanced diets. In sheer numbers, iron is the most prevalent micronutrient deficiency. Mainly women of reproduction age and children under five are affected by iron deficiency with prevalence hovering around 50% in developing countries. Among various regions in the world, it is South Asia which is hit hardest with prevalence reaching 80% in some countries. In infants and young children even mild anemia is associated with impaired intellectual as well as physical development. In older children and adults iron deficiency reduces work capacity and output. It also leads to increased accidents at work. While there is no single remedy, a combination of several preventive approaches is believed to work best. Dietary improvement includes consumption of iron-and vitamin C-rich foods and foods of animal origin, and avoiding drinking tea or coffee with or soon after meals, Iron supplementation of foods, particularly of staple cereals, is practiced in a growing number of countries. Iron supplementation is the most common approach, particularly for pregnant women.

单选题The Modern Vegetarian Movement Today vegetarianism is trendy -25 percent of adolescents even think it's "cool". The success of vegetarian cosmetics and vegetarian foods like veggie dogs and turkey is a testament to the diet's popularity. Groups that promote vegetarianism and animal rights, like the Humane Society of the United States (HSUS) and People for the Ethical Treatment of Animals (PETA), have tremendous lobbying (游说) power with major companies. But vegetarianism hasn't always been so generally accepted, nor has it always been linked with the animal - rights movement. In 17th - and 18th - century Europe, some Protestant groups embraced vegetarianism as a moral directive - a way to be sinless. By the 19th century, European and North American vegetarianism had become a fringe (外围的) health movement. Adherents promoted the dietary benefits of vegetarianism -even coupling it with temperance (戒酒) and anti - tobacco movements. Modem, organized vegetarianism began with the formation of the Vegetarian Society in 1847 by the Bible Christian Sect of England. Within a year, the Society had 478 members. It wasn't until the mid 20th century that vegetarianism partnered with animal rights movement. America's most notorious animal rights organization, PETA, vigorously protests against all meat, animal products and animal testing. It is best known for its bold ad campaigns. The HSUS takes a less strict approach. It accepts that people will eat meat and focus instead on reducing meat consumption, replacing animal products and improving farming techniques. Both PETA and the HSUS, however, are powerful political machines: They hold stock in companies like Tyson, Wal - Mart, McDonald's and Smithfield's. The modem vegetarian movement is getting ever more powerful.

单选题Guests were Uscared/U when the bomb exploded.

单选题She has been the subject of {{U}}massive{{/U}} media coverage. A. extensive B. negative C. expensive D. active

单选题Techniques to harness the energy of the sun are being developed.

单选题Where Have All the Bees Gone? Scientists who study insects have a real mystery on their hands. All across the country, honeybees are leaving their hives and never returning. Researchers call this phenomenon Colony Collapse Disorder. According to surveys of beekeepers across the country, 25 to 40 percent of the honeybees in the United States have vanished from their hives since last fall. So far, no one can explain why. Colony collapse is a serious concern because bees play an important role in the production of about one-third of the foods we eat. As they feed, honeybees spread pollen from flower to flower. Without this process, a plant can"t produce seeds or fruits. Now, a group of scientists and beekeepers have teamed up to try to figure out what"s causing the alarming collapse of so many colonies. By sharing their expertise in honeybee behavior, health, and nutrition, team members hope to find out what"s contributing to the decline and to prevent bee disappearance in the future. It could be that disease is causing the disappearance of the bees. To explore that possibility, Jay Evans, a researcher at the United States Department of Agriculture (USDA) Bee Research Laboratory, examines bees taken from colonies that are collapsing. "We know what a healthy bee should look like on the inside, and we can look for physical signs of disease," he says. And bees from collapsing colonies don"t look very healthy. "Their stomachs are worn down, compared to the stomachs of healthy bees," Evans says. It may be that a parasite is damaging the bees digestive organs. Their immune systems may not be working as they should. Moreover, they have high levels of bacteria inside their bodies. Another cause of Colony Collapse Disorder may be certain chemicals that farmers apply to kill unwanted insects on crops, says Jerry Hayes, chief bee inspector for the Florida Department of Agriculture. Some studies, he says, suggest that a certain type of insecticide affects the honeybee"s nervous system (which includes the brain) and memory. "It seems like honeybees are going out and getting confused about where to go and what to do," he says. If it turns out that a disease is contributing to colony collapse, bees, genes could explain why some colonies have collapsed and others have not. In any group of bees there are many different kinds of genes. The more different genes a group has, the higher the group"s genetic diversity. So far scientists haven"t determined the role of genetic diversity in colony collapse, but it"s a promising theory, says Evans.

单选题It can be regarded as the worst day in my entire life.A. allB. youngC. wholeD. joyful

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 (流行的)", 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Martin decided that he had no {{U}}adequate{{/U}} proof.

单选题The number of Uunemployed/U people in that country is increasing rapidly.

单选题 A．Lindbergh used this additional training to get a job as an airmail pilot，flying out of St．Louis， Missouri． B．Working with an aviation company from San Diego，California，and with financial help from the city of St．Louis，Lindbergh got a customized(定制的)airplane that could make the journey． C．He also received a Medal of Honor，the highest United States military decoration． D．Eighty years ago，radio and movies were just beginning to have that kind of effect on Americans． E．His childhood was not full of fond memories． F．He quit school and moved to Nebraska where he learned to be a pilot．

单选题Medical facilities are being upgraded .

单选题Many cities have {{U}}restricted{{/U}} smoking in public places.

单选题In the U. S. , Straus and his colleague Mallie Paschall of the Pacific Institute for Research and Evaluation, looked at 1,510 children--806 kids ages 2 to 4, and 704 ages 5 to 9--and found that roughly three--quarters had endured some kind of corporal punishment in the previous two weeks, according to interviews with the mothers. Researchers measured the children's IQ initially, then again four years later. Those kids who hadn't been spanked in the initial survey period scored significantly better on intelligence and achievement tests than those who had been hit. Among the 2 - to - 4 - year - olds, the difference in IQ was five points ; among the older kids, there was a 2.8 - point gap. That association held after taking into account parental education, income and other environmental factors, says Straus. Which group of the children scored better in the survey?A. The children who had been spanked often.B. The children who had been spanked occasionally'.C. The children who had not been spanked.D. The children who had been spanked only onc