单选题I enjoyed the play -- it had a clever plot and very {{U}}funny{{/U}} dialogues.

单选题Even with detailed knowledge about an area, geologists cannot easily locate stores of underground natural gas.A. varietiesB. mapsC. suppliesD. shops

单选题If headaches only {{U}}occur{{/U}} at night，lack of fresh air is often the cause

单选题Sleepless at Night It was a normal summer night. Humidity (湿气) hung in the thick air. I couldn't go to sleep, partly because of my cold and partly because of my expectations for the next day. My mum had said that tomorrow was going to be a surprise. Sweat stuck to my aching body. Finally, I gathered enough strength to sit up. I looked out of my small window into the night. There was a big bright moon hanging in the sky, giving off a magic light. I couldn't stand the pressure anymore, so I did what I always do to make myself feel better. I went to the bathroom and picked up my toothbrush and toothpaste. I cleaned my teeth as if there was no tomorrow. Back and forth, up and down. Then I walked downstairs to look for some signs of movement, some life. Gladiator, my cat frightened me as he meowed (喵喵地唱出) his sad song. He was on the old orange couch (长沙发), sitting up on his front legs, waiting for something to happen. He looked at me as if to show "I'm lonely, pet me. I need a good hug (紧抱) ." Even the couch begged me to sit on it. In one movement I settled down onto the soft couch. This couch represented my parents' marriage, my birth, and hundreds of other little events. As I held Gladiator, my heart started beating heavily. My mind was flooded with questions: What's life? Am I really alive? Are you listening to me? Every time I moved my hand down Gladiator's body, I had a new thought; each touch sang a different song. I forgot all about the heat and the next day's surprise. The atmosphere was so full of warmth and silence that I sank into its arms. Falling asleep with the big cat in my arms, I felt all my worries slowly move away.

单选题 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 {{B}}Staying Active in Old Age Keeps People Mobile{{/B}} People over 70 who aren't active are more likely to develop problems walking or climbing stairs within a few years, according to a new study. These findings suggest that it's very important to stay______(51) in old age, study author Dr. Marjolein Visser told Reuters Health. "Physical activity in old age is as important______(52) taking your medications (药物)," Visser noted. "You do not need to join an expensive, fancy sports club with high-tech (高科技的) equipment. Your body will already______(53) from regular walking." Visser, a Dutch (荷兰的) scholar, explained that______(54) active helps prevent people from becoming breathless during simple activities, increase muscle mass and strength, and maintain the balance people need to walk up stairs, for instance. To investigate how important exercise is to older adults, Visser's team interviewed 3,075 men and______(55) between the ages of 70 and 79, all of whom said they had no problems walking one-quarter of a mile or climbing______(56). The investigators followed the subjects for 4-1/2 years, noting who developed problems ______(57) and climbing stairs. During the study, 34 percent of men and 47______(58) of women said they began to struggle with walking and climbing stairs. People______(59) were inactive were twice as likely to report these problems as people who said they got regular exercise. People who didn't exercise but had active lifestyles appeared to be at a somewhat higher risk of developing______(60) walking and climbing stairs, relative to people who exercised______(61). Still, leading an active lifestyle appeared to protect people______(62) problems better than being generally inactive, the researchers report in the Journal of the American Geriatrics (老年医学) Society. Among people who were inactive,______(63) who walked even a little bit-such as brisk (轻快的) walking for a little over an hour per week - were at a lower ______(64) of mobility (可动性) problems. "If you do not like to exercise or you cannot exercise______(65) of serious health problems or functional limitations, do try to be as active as possible," Visser advised.

单选题New York is rated second in the production of 850,000,000 dollars this year. A. ranked B. occupied C. arranged D. classified

单选题Please let me know if you are unable to Uattend/U the meeting.

单选题 Migrant Workers In the past twenty years, there has been an increasing tendency for workers to move from one country to another. {{U}} {{U}} 1 {{/U}} {{/U}}some newly independent countries have understandably restricted most jobs to local people, others have attracted and welcomed migrant workers. This is particularly the case in the Middle East, {{U}} {{U}} 2 {{/U}} {{/U}}increased oil incomes have enabled many countries to {{U}} {{U}} 3 {{/U}} {{/U}}outsiders to improve local facilities. {{U}} {{U}} 4 {{/U}} {{/U}}the Middle East has attracted oil-workers from the USA and Europe. It has brought in construction workers and technicians from many countries, {{U}} {{U}} 5 {{/U}} {{/U}}South Korea and Japan. In view of the difficult living and working conditions in the Middle East, it is not {{U}} {{U}} 6 {{/U}} {{/U}}that the pay is high to attract suitable workers. Many engineers and technicians can earn at least {{U}} {{U}} 7 {{/U}} {{/U}}money in the Middle East as they can in their own country, and this is a major attraction. An allied benefit is the low taxation or complete lack of it. This increases the net amount of pay received by visiting workers and is very popular with them. Sometimes a disadvantage has a compensating advantage. {{U}} {{U}} 8 {{/U}} {{/U}}, the difficult living conditions often lead to increased friendship when workers have to depend on each other {{U}} {{U}} 9 {{/U}} {{/U}}safety and comfort. {{U}} {{U}} 10 {{/U}} {{/U}}, many migrant workers can save large sums of money partly {{U}} {{U}} 11 {{/U}} {{/U}}the lack of entertainment facilities. The work is often complex and full of problems but this merely presents greater challenge to engineers who prefer to find solutions {{U}} {{U}} 12 {{/U}} {{/U}}problems rather than do routine work in their home country. One major problem which {{U}} {{U}} 13 {{/U}} {{/U}}migrant workers in the Middle East is that their jobs are temporary ones. They are nearly always on contract, so it is not easy for them to plan ahead with great confidence. This is to be expected since no country welcomes a large number of foreign workers as permanent residents. {{U}} {{U}} 14 {{/U}} {{/U}}, migrant workers accept this disadvantage, along with others, because of the {{U}} {{U}} 15 {{/U}} {{/U}}financial benefits which they receive.

单选题When does the next train Udepart/U?

单选题He rolled up his trouser leg to exhibit his wounded knee. A. spread B. open C. show D. examine

单选题Smart Exercise Doctors are starting to find more and more information that suggests a connection between exercise and brain development. Judy Cameron, a scientist at Oregon Health and Science University, studies brain development. According to her research, it seems that exercise can make blood vessels, including those in the brain, stronger and more fully developed. Dr. Cameron claims this allows people who exercise to concentrate better. As she says: "While we already know that exercise is good for the heart, exercise can literally cause physical changes in the brain." The effects of exercise on brain development can even be seen in babies. Babies who do activities that require a lot of movement and physical activity show greater brain development than babies who are less physically active. With babies, even a little movement can show big results. Margaret Barnes, a pediatrician (儿科医师), believes in the importance of exercise. She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies. "Babies need movement that stimulates their five senses. They need to establish a connection between motion and memory. In this way, as they get older, children will begin to associate physical activity with higher learning, " says Margaret. Older people can beef up their brains as well. Cornell University studied a group of seniors ranging in age from seventy to seventy-nine. Their study showed a short-term memory increase of up to 40 percent after exercising just three hours a week. The exercise does not have to be very difficult, but it does have to increase the heart rate. Also, just like the motion for infants, exercise for older people should involve some complexity. Learning some new skills or motions helps to open up memory paths in the brain that may not have been used for a long time. For most people, any type of physical activity that increases the heart rate is helpful. The main goal is to increase the brain's flow of blood. And your brain can benefit from as little as two to three hours of exercise a week.

单选题Human Heart Can Make New Cells Solving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age. The finding, published in the April 3 issue of Science, could open a new path for the treatment of heart diseases such as heart failure and heart attack, experts say. "We find that the beating cells in the heart, cardiomyocytes, are renewed," said lead researcher Dr. Jonas Frisen, a professor of stem cell research at the Karolinska Institute in Stockholm, Sweden. "It has previously not been known whether we were limited to the cardiomyocytes we are born with or if they could be renewed," he said. The process of renewing these cells changes over time, Frisen added. In a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0.45 percent by age 75. "If we can understand how the generation of new cardiomyocytes is regulated, it may be potentially possible to develop pharmaceuticals that promote this process to stimulate regeneration after for example, a heart attack, "Frisen said. That could lead to treatment that helps restore damaged hearts. "A lot of people suffer from chronic heart failure," noted co-author Dr. Ratan Bhardwaj. Ratan Bhardwaj, also from the Karolinska Institute. "Chronic heart failure arises from heart cells dying," he said. With this finding, scientists are "opening the door to potential therapies to having ourselves heal ourselves," Bhardwaj said. "Maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the problem they are facing." But barriers remain. According to Bhardwaj, scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they are dying off, especially in older patients with heart failure. In addition, the number of new cells the heart produces was estimated using healthy hearts-whether the rate of cell turnover in diseased hearts is the same remains unknown.

单选题in a laughter clinic, doctors

单选题 Skin Cancer Melanoma (黑素瘤), the deadliest kind of skin cancer is now the most common cancer in {{U}} {{U}} 1 {{/U}} {{/U}}British women, the country's leading cancer organization said Wednesday. Skin cancer has {{U}} {{U}} 2 {{/U}} {{/U}}cervical (子宫颈的) cancer as the top cancer striking women in their 20s, according to the latest data from Cancer Research United Kingdom. The trend is particularly {{U}} {{U}} 3 {{/U}} {{/U}}since younger people are not generally those most susceptible (易患的) to melanoma. Rates of skin cancer are {{U}} {{U}} 4 {{/U}} {{/U}}highest in people over age 75. But experts worry that increasing numbers of younger people being diagnosed with skin cancer could be the {{U}} {{U}} 5 {{/U}} {{/U}}of a dangerous trend. Women in their 20s make {{U}} {{U}} 6 {{/U}} {{/U}}a small percentage of all patients diagnosed with melanoma in Britain, but nearly a third of all cases occur in people younger than 50. Based on current numbers Cancer Research UK predicts that melanoma will become the fourth {{U}} {{U}} 7 {{/U}} {{/U}}common cancer for men and women of all ages by 2024, and that cases will jump from about 90,000 cases a year to more than 15,500. Cancer experts {{U}} {{U}} 8 {{/U}} {{/U}}the rising number of skin cancer cases largely to the surge in people using tanning salons. "Spending time on sun beds is just as {{U}} {{U}} 9 {{/U}} {{/U}}as staying out too long in the sun," said Caroline Cerny of Cancer Research UK. The organization is starting a SunSmart {{U}} {{U}} 10 {{/U}} {{/U}}to warn Britons of the dangers of being too bronzed. "The intensity of ultraviolet rays in some sun beds can be more than 10 {{U}} {{U}} 11 {{/U}} {{/U}}stronger than the midday sun," Cerny said. In the United States, several states require parental approval {{U}} {{U}} 12 {{/U}} {{/U}}minors can use tanning salons. Wisconsin bans people 16 and {{U}} {{U}} 13 {{/U}} {{/U}}from using tanning beds, and others ban children under 14. At least 29 states have regulations governing minors use of tanning salons. In the UK, Scottish politicians passed legislation banning these under 18 from using tanning beds, though it hasn't yet been implemented. There are no plans for {{U}} {{U}} 14 {{/U}} {{/U}}in the rest of the UK. The world Health Organization has previously recommended that tanning beds be regulated because of their potential to damage DNA in the skin. Experts said most deadly skin cancers could be {{U}} {{U}} 15 {{/U}} {{/U}}if people took the proper precautions when in the sun and avoided tanning beds.

单选题 Stomach Ulcer Stomach ulcers are the cause of severe pain for many people. Doctors have been able to help lessen the pain of ulcers, but they could not cure them. Now doctors have discovered a cause of ulcers. This means they may have found a way to cure people who suffer from the stomach pain. Studies show that ten percent of the population will develop an ulcer at some time in their life. So a possible cure is good news for many people. Ulcers are wounds in the stomach that are similar to small cuts or tears. These wounds can harm the tissue in the stomach, the pipe that carries the food to the stomach or parts of the small intestines. Fluids in the stomach then increase the pain of an ulcer. How does a person know he or she has an ulcer? Doctors say most people with ulcers feel a burning pain in their chest or stomach. This pain is often called heart burn. It usually happens before eating or during the night. It causes some people to lose their desire to eat, or they are unable to keep food in their stomachs. Doctors believed that stomach ulcers were caused by unusually strong stomach fluids, which damaged stomach tissue. Now they have discovered that most stomach ulcers are caused by a bacterial organism called Hillico Bactor Pilorie or HPillorie. HPillorie bacteria are what make stomach produce extra stomach fluid. Doctors found that they can kill the bacteria with medicines called antibiotics. Health experts say the discovery of a cure for stomach ulcers can save thousands of millions of dollars in medical costs. They also believe curing stomach ulcers will reduce the number of people who develop stomach cancer. The number of people with stomach cancer is very high in Japan, Southeast Asia and parts of Africa. Doctors say a person is more likely to get an stomach ulcer if his or her family has had one. In fact, a person with the family history of stomach ulcers is three times more likely to get one than other people. There are ways people can protect themselves from developing an stomach ulcer. Doctors say it is more important to reduce the amount of strong fluids in the stomach. To do this, doctors say, people should not smoke cigarettes or drink alcohol. And they say people should reduce tension in their lives.

单选题Which is NOT affected by the number of years we have to live?

单选题Her shoes {{U}}go with{{/U}} her gloves; they look very well together.

单选题Cooking Oil Fumes Cause Tumor The leading cause of lung cancer among women in the city was cooking oil fumes while men are more likely to develop the disease from smoking, said medical experts after a five-year research study. Doctors announced the results yesterday with analysis on some new tendencies in lung cancer. They said patients are younger, especially women. According to the Shanghai Tumor research Institute, more local residents die of lung cancer in the city than anything else. Following breast cancer, it has the second-highest incidence rate. "An unhealthy lifestyle is a very important reason for lung cancer," said Dr He Yumin from Shanghai Minshen Traditional Chinese Medicine Tumor Diagnosis and Treatment Center. He followed 2,276 lung cancer patients for five years. Among them, 1,433 were male. Smoking causes 70 percent of cases among men while only 18 percent of female patients developed cancer from smoking or inhaling second-hand smoke, according to the report. However, more than 60 percent of women with the disease had long term, close contact with strong oil fumes from cooking and complained about irritated eyes and throat. About 32 percent of women fried foods in boiling oil in unventilated kitchens and about 25 percent of women's bedrooms were adjacent to the kitchen. However, local women were surprised to learn cooking oil fumes could lead to cancer. Some claimed they may change food preparation methods. "Unless my family and I don't eat at home every day, I must stay in the kitchen to cook," said Xu Li, a 45-year-old local woman. "I know the fumes are bad for the skin, but it is the first time I heard that it can result in lung cancer. I have already started frying less. " Doctors said women's lung cancer had few links to personal health and physical condition, but was closely related to family cancer history, unhealthy dietary habits and weak immune systems. Other experts agreed with He. "Smoking is by far the biggest cause of lung cancer for men," said Dr Tan Binyong, honorary president of the Respiratory Disease Institute at Fudan University's Medical College. "It's true that second-hand smoke and cooking fumes are the main causes among women. " He's research also warned people not to stand near of stalls selling fried foods due to the poor quality of oils used. The chance of catching lung cancer is three times higher if exposed to the fume for a long time, experts said.

单选题The osprey flies above the water and when it spots a fish it swoops down to catch it.

单选题I Umeant to/U give you this book today, but I forgot.