单选题We are Urestricted/U to a speed of 30 miles an hour in built-up areas.

单选题The index is the government's chief Ugauae/U of future economic activity.

单选题He believed that this plan could be possibly carried out.A. feasiblyB. favorablyC. successfullyD. totally

单选题Rock climbing is {{U}}hazardous{{/U}}. A. interesting B. dangerous C. attractive D. useful

单选题The industrial revolution modified the whole structure of English society.

单选题The toy boat turned over and sank to the bottom of the pool.A. basisB. groundC. baseD. basement

单选题Blend the sugar, flour, and eggs together.A. bringB. mixC. takeD. buy

单选题The phrase "wary of" in paragraph 8 could be best replaced by

单选题Chronic Diseases: The World"s Leading Killer Chronic diseases are the leading cause of death in the world. Yet health experts say these conditions are often the most preventable. Chronic diseases include heart disease, stroke, cancer, diabetes(糖尿病) and lung disorders. The World Healh Organization says chronic diseases lead to about seventeen million early deaths each year. This United Nations agency expects more than three hundred eighty million people to die of chronic diseases by two thousand fifteen. It says about eighty percent of the deaths will happen in developing nations. The WHO says chronic diseases now cause two-thirds of all deaths in the Asia-Pacific area. In ten years it could be almost three-fourths. People are getting sick in their most economically pro ductive years. In fact, experts say chronic diseases are killing more middle-aged people in poorer countries than in wealthier ones. The WHO estimates that chronic diseases will cost China alone more than five hundred thousand million dollars in the next ten years. That estimate represents the costs of medical treatment and lost productivity. Russia and India are also expected to face huge economic losses. Kim Hak-Su is the head of the United Nations Economic and Social Commission for Asia and the Pacific. Last week in Bangkok he presented a WHO report on the problem. It says deaths from chronic diseases have increased largely as the result of economic gains in many countries. The report details the latest findings from nine countries. They include Brazil, Britain, Canada, China, India and Nigeria. The others are Pakistan, Russia and Tanzania. Mister Kim says infectious and parasitic(寄生的) diseases have until recently been the main killers in Asia and the Pacific. But he says they are no longer the major cause of death in most countries. Health officials say as many as eighty percent of deaths from chronic diseases could be prevented. They say an important tool for governments is to restrict the marketing of alcohol and tobacco to young people. Also, more programs are needed to urge healthy eating and more physical activity. UN officials aim through international action to reduce chronic-disease deaths by two percent each year through two thousand fifteen. They say meeting that target could save thirty-six million lives. That includes twenty-five million in Asia and the Pacific.

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}} Changes in Museums{{/B}} Museums have changed. They are no longer places that one "should" visit, they are places to enjoy and learn. At a science museum in Ontario, Canada, you can feel your hair stand on end as harmless electricity passes through your body. At the Metropolitan (大城市的) Museum of Art in New York City, you can look at the seventeenth century instruments while listening to their music. At New York's American Museum of Natural History recently, you can help make a bone-by-hone reproduction of the museum's dinosaur(恐龙), a beast that lived 200 million years age. More and more museum directors are realizing that people learn best when they can somehow become part of what they are seeing. In many science museums, for example, there are no guided tours. The visitor is encouraged to touch, listen, operate, and experiment so as to discover scientific principles for himself. The purpose is not only to provide fun but also to help people feel at home in the world of science. The theory is that people who do not understand science will probably fear it, and those who fear science will not use it to best advantage. One cause of all these changes is the increase in wealth and leisure time. Another cause is the rising percentage of young people in the population. Many of these young people are college students or college graduates. Leon F. Twiggs, a young black professor of art once said, "They see things in a new and different way, They are not satisfied to stand and look at works of art; they want art they can participate(参加) in." The same is true of science and history.

单选题We'll give every teacher space to develop. A. chance B. employment C. room D. opportunity

单选题The doctors have abandoned the hope to rescue the old man.

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。 Want to Be 100? Listen to These 5 Centenarians(百岁老人) Five neighbors at a central Missouri retirement community who are all centenarians get asked all the time: "How did you live to be 100?." If you want to live to 100 or more, this rare group of five golden girls says the key to longevity (长寿)is working hard at a job you love and taking care of your body while you're at it. Even though an estimated 70,000 people in the country are currently at the century mark or be yond in age, it is unusual to find five 100-year-olds living in one place. The average life-span(寿命) of Americans is about two or three years short of an 80th birthday party. And most people don't want to cut out coffee, soda, alcohol, cigarettes, and eat healthy food. "People tell me all the time, 'I don't want to live to be 100,'" said Mildred Leaver, who turned 100 in June. "I think that's just sad. Aging is attitude and I don't feel old," said Leaver, a former educator who still drives her Buick around town. It doesn't take long to see that Leaver and her neighbors Mildred Harris, Grace Wolfsan, Gladys Stuart and Viola Semas, have a lot more in common than their longevity and lifelong healthy habits. All are 100 except Stuart, who is 101. Even though their sight and hearing aren't what they used to be, they've all avoided illnesses that many elderly people are stricken with. It's been 50 years since Leaver beat cancer for the first and only time. The common thread that connects these women is the decades of service to jobs each loved as a farmer, designer, school principal, bookkeeper and secretary. In the early years of their lives, gain fully employed women like them were just as rare as 100-year-olds are today.

单选题Patience is one of the most important attributes in a teacher.

单选题Her sister urged her to apply for the job.

单选题2. Yoga and Health There are many ways to stay healthy and combat stress. Long before television was used to advertise ways to grow healthier there was Yoga to aid people in their desire to be healthier. People who practice Yoga will tell you to turn off the TV, grab something soft to sit on, and get ready to become healthier and say goodbye to stress. Some people describe Yoga as an ancient method of phyrsical and mental exercises that can be practiced anywhere. Unlike many other forms of exercise, Yoga does not require any gadgets (器械). People who use Yoga to grow healthier Call do so by simply wearing some comfortable clothes and using a blanket to do their training on. Yoga is practiced by all kinds of people. You do not have to be big or small, young or old, a great athlete or a non - athlete. You do not need balls, gloves, expensive shoes, or anything with wheels to practice Yoga. Everyone can practice it. You can also practice by yourself or with a group, indoors or out. Yoga teachers tell you that Yoga is a series of physical exercises that use the body and mind to create harmony and health within yourself Yoga allows you to gain strength, calmness, and flexibility while relieving stress and tension from your body. About 2000 years ago in India, a wise man, Pantanjali, outlined the system for Yoga. In his writings, he explains how Yoga tackles both physical and emotional ailments. Yoga not only can help you recover from a physical condition, such as a bad back, asthma, or high blood pressure, but it also can help those of us who suffer from anxiety or depression. Yoga can do what all those items you see on late night television claim to do, and you do not have to buy anything to get started. Yoga, by disciplining the body and the mind, provides you with a very sophisticated and effective way to curb the effects of stress. Today, as you worry about everything from grades to terrorism, stress can take its toll. Maybe you do not need to add stress by trying to decide which television product to buy to make you healthy. By practicing Yoga, stress is minimized, and you can get back to the business of getting and staying healthy. If you have not already done so, you might want to learn more about Yoga as a way to improve your health.

单选题While some bacteria are beneficial, others are {{U}}harmful{{/U}} in that cause disease.

单选题 Plant Gas Scientists have been studying natural sources of methane for decades but hadn't regarded plants as a producer, notes Frank Keppler, a geochemist at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Now Keppler and his colleagues find that plants, from grasses to trees, may also be sources of the greenhouse gas. This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment. Previously, researchers had thought that it was impossible for plants to make significant amounts of the gas. They had assumed that, microbes need to be in environments without oxygen to produce methane. Methane is a greenhouse gas, like carbon dioxide. Gases such as methane and carbon dioxide trap heat in Earth's atmosphere and contribute to global warming. In its experiments, Keppler's team used sealed chambers that contained the same concentration of oxygen that Earth's atmosphere has. They measured the amounts of methane that were released by both living plants; and dried plant material, such as fallen leaves. With the dried plants, the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees Celsius. At 30 degrees Celsius, they found, a gram of dried plant material released up to 3 nanograms of methane per hour. (One nanogram is a billionth of a gram.) With every 10-degree rise in temperature, the amount of methane released each hour roughly doubled. Living plants growing at their normal temperatures released as much as 370 nanograms of methane per gram of plant tissue per hour. Methane emissions tripled when living and dead plant was exposed to sunlight. Because there was plenty of oxygen available, it's unlikely that the types of bacteria that normally make methane were involved. Experiments on plants that were grown in water rather than soil also resulted in methane emissions. That's another strong sign that the gas came from the plants and not soil microbes. The new finding is an "interesting observation," says Jennifer Y. King, a biogeochemist at the University of Minnesota in St. Paul. Because some types of soil microbes consume methane, they may prevent plant-produced methane from reaching the atmosphere. Field tests will be needed to assess the plant's influence, she notes.

单选题The polar regions are generally covered with ice and snow. A. areas B. rocks C. mountains D. seas

单选题Eight to ten million people around the world are now infected with the virus that causes AIDS, and the incidence of the infection is rising dramatically in some pans of the world, the World Health Organization reports. The estimate is (51) with an earlier projection by the organization that 15 million to 20 million people would be infected by HIV by the year 2005. The (52) reflect the growing (53) of the AIDS virus round the world. "It is clear that the problem of HIV infection around the globe is (54) rapidly, especially in (55) countries in Africa and Asia, "said Dr. Michael Merson, the director of the agency' s worldwide programs on AIDS. The new estimates are based on a recently (56) analysis of blood tests in which the AIDS virus was found in 1988 and 1989. The analysis showed that the (57) of HIV infection is slowing in industrialized countries. But in sub - Saharan African, cases of HIV infection have increased (58) about 5 million from 2.5 million in 1987. That year, most infected people were found in big cities; now the virus is spreading to (59) areas. The agency calculated that about one (60) 40 adult men and women is infected in that region. (61) from Southern Asia, including Thailand and India, showed marked increase in HIV infection among female prostitutes (妓女) and people who inject drugs into themselves. The (62) number of HIV infection in Asia has risen from next to nothing two years ago to at least 500,000, the agency reported. The agency also (63) a rising incidence of HIV infection, AIDS cases and (64) among women and children in the 2000s, with three million of them (65) to die in the next decade.