单选题In the United States educational system, intermediate school is the transitional phase between the primary grades and high school.A. stageB. notionC. patternD. alternative

单选题The ice is not thick enough to bear the weigh of a tank.

单选题Don't try to dignify those few hairs on your face by calling them a beard.

单选题下面有3篇短文，每篇短文后有5道题。请根据短文回答其后面的问题，为每题确定一个最佳答案。 {{B}}第一篇{{/B}} Enjoy Sun Shine People travel for a lot of reasons. Some tourists go to see battlefields or religious shrines. Others are looking for culture, or simply want to have their picture taken in front of famous places. But most European tourists are looking for a sunny beach to lie on. Northern European are willing to pay a lot of money and put up with a lot of inconveniences for the sun because they have so little of it. Residents of cities like London, Copenhagen, and Amsterdam spend a lot of their winter in the dark because the days are so short, and much of the rest the year in the rain. This is the reason the Mediterranean has always attracted them, Every summer, more than 25 million people travel to Mediterranean resort and beaches for their vacation. They all come for the same reason: sun！ The huge crowds mean lots of money for the economies of Mediterranean countries. Italy's 30,000 hotels are hooked solid every summer. And 13 million people camp out on French beaches, parks and roadsides. Spain's long sandy coastline attracts more people than anywhere else. 37 million tourists visit yearly, or one tourist for every person living in Spain. But there are signs that the area is getting more tourism than it can handle. The Mediterranean is already one the most polluted seas on earth. And with increased tourism, it's getting worse. The French can't figure out what to do with all the garbage left by campers around St. Tropez. And in many places, swimming is dangerous because of pollution. None of this, however, is spoiling anyone's fun. The Mediterranean gets more popular every year with tourists. Obviously, they don't go there for clean water and solitude. They tolerate traffic jams and seem to like crowded beaches. They don't even mind the pollution. No matter how dirty the water is, the coastline still looks beautiful. And as long as the sun shines, it's still better than sitting in the cold rain in Berlin, London, or Oslo.

单选题America's emphasis on the importance of education for everyone has Uspurred/U scientific research,

单选题Margaret Sanger and Birth Control Margaret Sanger, an American nurse, was the first to start the modern birth control movement in the United States. In 1912, she 【51】 publishing information about women''s reproductive (生殖的) concerns through articles and books. In 1914, Sanger was charged 【52】 violation of the Comstock Law, which federal legislation had passed in 1873 forbidding the mailing of sexy material 【53】 information about birth control and contraceptive (避孕的) devices. Though she was put in jail for these activities, Sanger 【54】 to publish and spread information about birth control. She and her sister Ethel Byrne opened the first of several birth control clinics in America on October 16, 1916, in Brooklyn, New York. The Comstock Law was rewritten by Congress in 1936 to 【55】 birth control information and devices. Many states had laws forbidding distribution or use of contraceptive devices but the constitutionality (合宪性) of these laws was increasingly 【56】 In 1965, the Supreme Court of the United States ruled that mar?ried people have the right to practice birth control without government intervention. In 1972, the court 【57】 that unmarried people have the same right. Today there are more birth control options 【58】 , but overpopulation and unwanted pregnancies remain worldwide 【59】 Having more children than one can support may lead 【60】 poverty, illness, and high death rates for babies, children, and women. The problem of teenage pregnancy is 【61】 worse in the United States 【62】 in almost any other developed country. Studies show that birth rates for women under 20 are higher in the United States than in 29 other 【63】 countries. A detailed study suggested that the problem of teenage pregnancy in the United States may be 【64】 to less sex education in schools and lower availability of contraceptive services and supplies to young people. This study 【65】 the view of people in the United States who argue that sex education or making contraceptive supplies available to school-age children promotes sexual activity.

单选题The findings indicate that it is all right to sleep for 6.5 hours a night.

单选题 Most Adults in U.S. Have Low Risk of Heart Disease More than 80 percent of U.S. adults have a less than 10-percent risk of developing heart disease in the next 10 years, according to a report in the Journal of the American College of Cardiology. Just 3 percent have a risk that exceeds 20 percent. "I hope that these numbers will give physicians, researchers, health policy analysts, and others a better idea of how coronary heart disease is distributed in the U.S. population," lead author Dr. Earl S. Ford, from the Centers for Disease Control and Prevention in Atlanta, said in a statement. The findings are based on analysis of data from 13,769 subjects, between 20 and 79 years of age, who participated in the Third National Health and Nutrition Examination Survey from 1988 to 1994. Overall, 82 percent of adults had a risk of less than 10 percent, 15 percent had a risk that fell between 10 to 20 percent, and 3 percent had a risk above 20 percent. The proportion of subjects in the highest risk group increased with advancing age, and men were more likely than women to be in this group. By contrast, race or ethnicity had little effect on risk distributions. Although the report suggests that most adults have a low 10-year risk of heart disease, a large proportion have a high or immediate risk, Dr. Daniel S. Berman, from Cedars-Sinai Medical Center in Los Angeles, and Dr. Nathan D. Wong, from the University of California at Irvine, note in a related editorial. Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward, they add.

单选题His eyes {{U}}widened{{/U}} in surprise after hearing the news. A. extended B. stretched C. broadened D. traversed

单选题There is always excitement at the Olympic Games when an athlete {{U}}breaks{{/U}} a previous record of performance, A. beats B. destroys C. maintains D. defends

单选题I hope you have left none of your Ubelongings/U in the hotel.

单选题Sulfur has {{U}}occasionally{{/U}} been found in the earth in an almost pure state.

单选题Chocolate to Live For! A study published in the Journal of the American Medical Association in 2003 reported that dark chocolate may lower your blood pressure. Researchers at the University of Cologne studied men and women who were recently diagnosed with mild high blood pressure. Half were given 100g (fabout 3.5 ounces) of dark chocolate per day and half were given white chocolate. After only two weeks systolic (收缩的) blood pressure decreased on average by five points and diastolic (以及舒张的) blood pressure by two points in those consuming dark chocolate, but not those consuming white chocolate. In a similar study, researchers from Italy reported in the American Heart Association journal Hypertension that 3.5 ounces of dark chocolate for one week lowered systolic blood pressure by 12 points and diastolic blood pressure by 8.5 points when blood pressure was monitored continuously for 24 hours. Insulin (胰岛素) sensitivity and LDL cholesterol also improved. No benefits were seen with white chocolate. Another study published in the Journal of the American College of Cardiology found that chocolate may help repair damage to smokers' blood vessels, at least temporarily. why? Chocolate increases your body' s production of nitric oxide (一氧化氮), a powerful substance that causes your blood vessels to relax and dilate. This, in turn, causes an increase in blood flow and a decrease in blood pressure--like opening a water spigot (水龙头). A study published in July in the Journal of the American Medical Association reported that just 30 calories per day of dark chocolate lowered blood pressure and increased nitric oxide production after 18 weeks. Nitric oxide is also stimulated by drugs such as Viagra and Levitra, which increase blood flow to the penis and enhance erections. This may be one of the reasons why chocolate has had a long reputation as an aphrodisiac (壮阳药). Casanova (卡萨诺瓦) is said to have considered it as his "favorite breakfast dish. " Chocolate also contains phenylethylamine (苯乙胺), which research suggests is a stimulant that is released when you' re interacting with someone intimately.

单选题They walked through the great {{U}}forest{{/U}}.

单选题The wonders which medical workers have already brought about in the diagnosis(诊断) and treatment of disease suggest that a time may come when the physician will be able to analyze most illnesses as soon as they start, and cure them before damage results. How soon this "golden age of healing" arrives will depend greatly on how close is the collaboration between research workers in medicine and those who work in the sciences on which medicine depends. The physician has long relied on the chemist for curative drugs, and on the physicist for diagnostic instruments and healing rays. In the one field new materials and in the other new devices are being produced in increasing numbers, helping to make imminent new miracles of medicine. The X-ray and the microscope have extended the vision of the medical observer until he can see through ten inches of living flesh or into a single tissue cell, yet similar but much more powerful tools still await development. Modern electrical devices enable him to listen to faint murmurings of the life processes, or to measure feeble currents arising from heart and brain and nerve; yet electrical body measurements are but little understood. Now newly discovered atomic rays are being brought to help him destroy malignant invaders of the human system, and there is every reason to believe that even more curative rays await discovery.

单选题The research team needs to confer with the director before it begins its final report. A. argue B. debate C. compute D. consult

单选题Traffic reaches its （rush hour） between 8:00 and 9:00 in the morning.

单选题Eating Potatoes Gives Your Immune System a Boost Eating potatoes is not only good for bowel health, but also for the whole immune system, especially when they come in the form of a potato salad or eaten cold. In a study on an animal model, researchers in Spain found that pigs fed large quantities of raw potato starch (RPS) not only had a healthier bowel, but also decreased levels of white blood cells, such as leucocytes and lymphocytes in their blood. White blood cells are produced as a result of inflammation or disease, generally when the body is challenged. The general down-regulation of leucocytes observed by the Spanish researchers suggests an overall beneficial effect, a generally more healthy body. The reduction in leucocyte levels was about 15 percent. Lower lymphocyte levels are also indicative of reduced levels of inflammation, but the observed reduction in both lymphocyte density and lymphocyte apoptosis is surprising. In what was the longest study of its kind, pigs were fed RPS over 14 weeks to find out the effect of starch on bowel health. "The use of raw potato starch in this experiment is designed to simulate the effects of a diet high in resistant starch," said study leader Jose Francisco Perez at the Universitat Autonoma de Barcelona, Spain. Humans do not eat raw potatoes, but they do eat a lot of foods that contain resistant starch, such as cold boiled potatoes, legumes, grains, green bananas, pasta and cereals. About 10 percent of the starch eaten by human is resistant starch—starch that is not digested in the small intestine and so is shunted into the large intestine where it ferments. Starch consumption is thought to reduce the risk of large bowel cancer and may also have an effect on irritable bowel syndrome (IBS). Immunology expert Lena Ohman"s team previously found that the overall lymphocyte levels do not vary for IBS patients, but that lymphocytes are transferred from the peripheral blood to the gut, which support the hypothesis of IBS being at least partially an inflammatory disorder. She says the decrease in lymphocytes observed by the Spanish is therefore interesting, and a diet of resistant starch may be worth trying in IBS patients. Ohman is currently at the Department of Internal Medicine, Goteborg University, Sweden. The study is published in the journal Chemistry and Industry, the magazine of the SCI.

单选题The history of the exploration of Antarctica recounts many tales of perseverance and suffering.

单选题They Say Ireland Is the Best Ireland is the best place in the world to live in for 2005, according to a life quality ranking that appeared in Britain"s Economist magazine last week. The ambitious attempt to compare happiness levels around the world is based on the principle that wealth is not the only measure of human satisfaction and welt-being. The index of 111 countries uses data on incomes, health, unemployment, climate, political stability, job security, gender equality as well as what the magazine calls "freedom, family and community life". Despite the bad weather, troubled health service, traffic congestion (拥挤), gender inequality and the high cost of living, Ireland scored an impressive 8.33 points out of 10. That put it well ahead of second-place Switzerland, which managed 8.07. Zimbabwe troubled by political insecurity and hunger, is rated the gloomiest (最差的), picking up only 3.89 points. "Although rising incomes and increased individual choices are highly valued," the report said. "Some of the factors associated with modernization such as the breakdown (崩溃) in traditional institutions and family values in part take away from a positive impact." "Ireland wins because it successfully combines the most desirable elements of the new with the preservation of certain warm elements of the old, such as stable family and community life." The magazine admitted measuring quality of life is not a straightforward thing to do, and that its findings would have their critics. No.2 on the list is Switzerland. The other nations in the top 10 are Norway, Luxembourg, Sweden, Australia, Iceland, Italy, Denmark and Spain. The UK is positioned at No.29, a much lower position chiefly because of the social and family breakdown recorded in official statistics. The US, which has the second highest per capita GDP (人均国内生产总值) after Luxembourg, took the 13th place in the survey. China was in the lower half of the league at 60th.