单选题It is laid down in the regulations that all members must carry their membership cards at all times.

单选题After making observations for a week in the plant, the industrial engineer made a number of very {{U}}constructive{{/U}} suggestions in an oral report to the manager.

单选题If a company is paying Jersey or Guernsey income tax, the Authorities will require the filing of amounts to {{U}}substantiate{{/U}} the assessable profit.

单选题As a result of careless washing the jacket was reduced to a child's size~

单选题U.S. to Start $3.2 Billion Child Health Study in January A study that will cost $3.2 billion and last more than two decades to track the health of 100,000 U.S. children from before birth to age 21 will be launched in January, U.S. health officials said on Friday. Officials from the U.S. government"s National Institutes of Health (NIH) said they hope the study, to be conducted at 105 locations throughout the United States, can help identify early-life influences that affect later development, with the goal of learning new ways to treat or prevent illness. The study will examine hereditary and environmental factors such as exposure to certain chemicals that affect health. Researchers will collect genetic and biological samples from people in the study as well as samples from the homes of the women and their babies including air, water, dust and materials used to construct their residences, the NIH said. Officials said more than $200 million has been spent already and the study is projected to cost $3.2 billion. "We anticipate that in the long term, what we learn from the study will result in a significant savings in the nation"s health care costs," Dr. Duane Alexander, who heads the NIH"s Eunice Kennedy Shriver National Institute of Child Health and Human Development, told reporters. The study will begin in January when the University of North Carolina and the Mount Sinai School of Medicine in New York start signing up pregnant women whose babies will then be followed to age 21. Some of the early findings will be about factors behind pre-term birth, which has become more common in recent years, according to Dr. Peter Scheidt of the NIH, who heads the study. The people taking part will be from rural, urban and suburban areas, from all income and educational levels and from all racial groups, the NIH said.

单选题You can {{U}}turn to{{/U}} different kinds of people, dictionaries or maps, to find out what you wish to know.

单选题Most people find rejection hard to accept.

单选题One Good Reason to Let Smallpox Live It's now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the glorious achievement of 1980, when smallpox was eradicated in the wild, by destroying the killer virus in the last two labs that are supposed to have it-one in the US and one in Russia. If smallpox had truly gone from the planet, what point was there in keeping these reserves? (51) reality, of course, it was naive to (52) that everyone would let (53) of such a potent potential weapon. 1 Undoubtedly several nations still have (54) vials. (55) the last "official" stocks of live virus bred mistrust of the US and Russia, (56) no obvious gain. Now American researchers have (57) an animal model of the human disease, opening the (58) for tests on new treatments and vaccines. So one again there's a good reason to (59) the virus-just in (60) the disease puts in a reappearance. How do we (61) with the mistrust of the US and Russia? (62) Keep the virus (63) international auspices in a well-guarded UN laboratory that's open to all countries. The US will object, of course, just as it rejects a multilateral approach to just about everything. But it doesn't (64) the idea is wrong. If the virus (65) useful, the let's make it the servant of all humanity—not just a part of it.

单选题The number of college student is on rise recently.A. increasingB. droppingC. decreasingD. reducing

单选题Congressional debate over the passage of this controversial bill is inevitable.A. popularB. personalC. disputedD. beneficial

单选题When Cousins wrote his book, everyone agreed with him.

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}}Diet, Alcohol Linked to Nearly One Third of Cancers{{/B}} Diet is second only to tobacco as a leading{{U}} (51) {{/U}}of cancer and, along with alcohol, is responsible for nearly one third of cases of the disease{{U}} (52) {{/U}}developed countries, a leading researcher said on Tuesday. Dr. Tim Key, of the University of Oxford, told a cancer conference that scientists are still discovering how certain foods contribute to{{U}} (53) {{/U}}, but they know that diet, alcohol and obesity{{U}} (54) {{/U}}a major role. "Five percent of cancers could be avoided{{U}} (55) {{/U}}nobody was obese," he said. While tobacco is linked to about 30{{U}} (56) {{/U}}of cancer cases, diet is involved in an estimated 25 percent and alcohol{{U}} (57) {{/U}}about six percent. Obesity raises the{{U}} (58) {{/U}}of breast, womb, bowel and kidney cancer, while alcohol is known to cause cancers of the mouth, throat and liver. Its dangerous impact is{{U}} (59) {{/U}}when combined with smoking. Key told the meeting of the charity Cancer Research UK{{U}} (60) {{/U}}other elements of diet linked to cancer are{{U}} (61) {{/U}}unknown but scientists are hoping that the EPIC study, which is comparing the diets Of 500,000 people in 10 countries and their risk of cancer, will provide some{{U}} (62) {{/U}}. Early results of the study have revealed that Norway, Sweden and Denmark have the{{U}} (63) {{/U}}consumption of fruit and vegetables among European countries while Italy and Spain have the highest. Eating at{{U}} (64) {{/U}}five portions of fruit and vegetables a day is recommended to reduce the risk of cancer. Key, principal scientist on the EPIC study, said it is looking at dietary links to some of the most common cancers{{U}} (65) {{/U}}colorectal, breast and prostate.

单选题A turbulent storm was a major factor in the defeat of the Spanish Armada.A. noxiousB. violentC. mysteriousD. pathetic

单选题The U.S. faces severe economic problems.

单选题What were the effects of the decision she made?

单选题Bill Gates: Unleashing Your Creativity I"ve always been an optimist and I suppose that is rooted in my belief that the power of creativity and intelligence can make the world a better place. For as long as I can remember, I"ve loved learning new things and solving problems. So when I sat down at a computer for the first time in seventh grade, I was hooked. It was a clunky old teletype machine and it could barely do anything compared to the computers we have today. But it changed my life. When my friend Paul Alien and I started Microsoft 30 years ago, we bad a vision of "a computer on every desk and in every home," which probably sounded a little too optimistic at a time when most computers were the size of refrigerators. But we believed that personal computers would change the world. And they have. And after 30 years, I"m still as inspired by computers as I was back in seventh grade. I believe that computers are the most incredible tool we can use to feed our curiosity and inventiveness to help us solve problems that even the smartest people couldn"t solve on their own. Computers have transformed how we learn, giving kids everywhere a window into all of the world"s knowledge. They"re helping us build communities around the things we care about and to stay close to the people who are important to us, no matter where they are. Like my friend Warren Buffett, I feel particularly lucky to do something every day that I love to do. He calls it "tap-dancing to work". My job at Microsoft is as challenging as ever, but what makes me "tap-dance to work" is when we show people something new, like a computer that can recognize your handwriting or your speech, or one that can store a lifetime"s worth of photos, and they say, "I didn"t know you could do that with a PC!" But for all the cool things that a person can do with a PC, there are lots of other ways we can put our creativity and intelligence to work to improve our world. There are still far too many people in the world whose most basic needs go unmet. Every year, for example, millions of people die from diseases that are easy to prevent or treat in the developed world. I believe that my own good fortune brings with it a responsibility to give back to the world. My wife, Melinda, and I have committed to improving health and education in a way that can help as many people as possible. As a father, I believe that the death of a child in Africa is no less poignant or tragic than the death of a child anywhere else, and that it doesn"t take much to make an immense difference in these children"s lives. I"m still very much an optimist, and I believe that progress on even the world"s toughest problems is possible—and it"s happening every day. We"re seeing new drugs for deadly diseases, new diagnostic tools, and new attention paid to the health problems in the developing world. I"m excited by the possibilities I see for medicine, for education and, of course, for technology. And I believe that through our natural inventiveness, creativity and willingness to solve tough problems, we"re going to make some amazing achievements in all these areas in my lifetime.

单选题The architecture is harmonious and no building is over six-storey high.______

单选题A New Cause of Suffering A conference on obesity (肥胖症) was recently held in Vienna. Two thousand experts from more than fifty countries attended the conference. According to statistics, 1.2 billion people worldwide are overweight, and 250 million are too fat. Obesity is rapidly becoming a new cause of suffering. Professor Friedrich Hopichler of Salzberg said: "We are living in the new age but with the metabolism (新陈代谢) of a stone-age man. I have just been to the United States. It is really terrible. A pizza (比萨饼) shop is appearing on every comer. We have been occupied by fast food and Coca-Cola-ization." Many of the experts stressed that obesity was a potential killer. Hopichler said: "Eighty percent of all diabetics (糖尿病人) are too fat, also fifty percent of all patients with high blood pressure and fifty percent with fatty tissue complaints. Ten percent more weight means thirteen percent more risk of heart disease. Reducing one"s weight by ten percent leads to thirteen percent lower blood pressure." Another expert Hermann Toplak said that the state health services should improve their financing of preventive programs. "The health insurance pays for surgery (such as reducing the size of the stomach) when the body-mass index (身体质量指数) is more than 40. That is equivalent to a weight of 116 kilograms for a height of 1.60 meters. One should start earlier. " Toplak said that prevention should begin in school. "Child obesity has a close relation with the time which children spend in front of TV sets. "

单选题Their parents once lived under very severe conditions.

单选题Sleep Deficit Judging from recent surveys, most experts in sleep behavior agree that there is virtually an epidemic(流行病) of sleepiness in the nation. "I can"t think of a single study that hasn"t found Americans getting less sleep than they ought to," says Dr. David. Even people who think they are sleeping enough would probably be better off with more rest. The beginning of our sleep-deficit(睡眠不足) crisis can be traced to the invention of the light bulb a century ago. From diary entries and other personal accounts from the 18th and 19th centuries, sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night. "The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark." By the 1950s and 1960s, that sleep schedule had been reduced dramatically, to between 7.5 and 8 hours, and most people had to wake up to an alarm clock. "People cheat on their sleep, and they don"t even realize they"re doing it," says Dr. David. "They think they"re okay because they can get by on 6.5 hours, when they really need 7.5, 8 or even more to feel ideally vigorous." Perhaps the most merciless robber of sleep, researchers say, is the complexity of the day. Whenever pressures from work, family, friends and community mount, many people consider sleep the least expensive item on his programme. In our society, you"re considered dynamic if you say you only need 5.5 hours" sleep. If you"ve got to get 8.5 hours, people think you lack drive and ambition. To determine the consequences of sleep deficit, researchers have put subjects through a set of psychological and performance tests requiring them, for instance, to add columns of numbers or recall a passage read to them only minutes earlier. "We"ve found that if you"re in sleep deficit, performance suffers," says Dr. David. "Short-term memory is weakened, as are abilities to make decisions and to concentrate."