单选题When machines become outdated there is a tendency to move them into other departments that have not previously been computerized.A. advancedB. out-of-dateC. modernD. cool

单选题Regeneration of a part of the body is impossible without

单选题Police have still found no {{U}}clues{{/U}} as to the whereabouts of the missing child.

单选题Alice Walker's graphic depiction of the lives of Black people in the south has established her as one of the most promising contemporary writers in the United States.A. optimisticB. humorousC. somberD. vivid

单选题It seems {{U}}highly{{/U}} unlikely that she will pass the exam.

单选题They converted the spare bedroom into an office.A. reducedB. movedC. turnedD. reformed

单选题Learning to Forgive To forgive may be divine, but no one ever said it was easy. When someone has deeply hurt you, it can be extremely difficult to let go of your grudge . But forgiveness is possible, and it can be surprisingly beneficial to your physical and mental health. "People who forgive show less depression, anger and stress and more hopefulness," says Frederic Luskin, Ph. D., author of Forgive for Good . "So it can help save on the wear and tear on our organs, reduce the wearing out of the immune system and allow people to feel more vital." So how do you start the healing? Try following these steps: Calm yourself. To defuse your anger, try a simple stress-management technique. "Take a couple of breaths and think of something that gives you pleasure: a beautiful scene in nature, or someone you love," Luskin says. Don"t wait for an apology. "Many times the person who hurt you has no intention of apologizing," Luskin says. "They may have wanted to hurt you or they just don"t see things the same way. So if you wait for people to apologize, you could be waiting an awfully long time." Keep in mind that forgiveness does not necessarily mean reconciliation with the person who upset you or condoning of his or her action. Take the control away from your offender. Mentally replaying your hurt gives power to the person who caused you pain. "Instead of focusing on your wounded feelings, learn to look for the love, beauty and kindness around you," Luskin says. Try to see things from the other person"s perspective. If you empathize with that person, you may realize that he or she was acting out of ignorance, fear, even love. To gain perspective, you may want to write a letter to yourself from your offender"s point of view. Recognize the benefits of forgiveness. Research has shown that people who forgive report more energy, better appetite and better sleep patterns. Don"t forget to forgive yourself. "For some people, forgiving themselves is the biggest challenge," Luskin says. "But it can rob you of your self-confidence if you don"t do it."

单选题Every week the magazine presents the (profile) of a well-known sports personality.

单选题Stem Cell Therapy May Help Repair the Heart According to scientists in the USA, stem cell therapy may one day be able to repair the hearts of people with heart failure. Researchers at Pittsburgh University School of Medicine examined 20 patients who had severe heart failure and were going to have surgery. They injected stem cells into the parts of their hearts that were damaged. They then compared their hearts with those of people who had undergone surgery without having the stem cells injected into them (they had also suffered from severe heart failure). The patients who had had the stem cells injected had hearts that were able to pump (用泵抽运) more blood than the others. According to Professor Robert Kormos, one of the researchers, these results could revolutionize heart treatment. Although previous studies had indicated that there might be a benefit, this is the first study that has actually proved that stem cell therapy can help the failing heart work better. All the patients in this study had hearts that could not pump blood properly. The scientists measured their ejection fraction (射血分数). This is a measure of heart performance; you measure how much blood is being pumped out by the left ventricle (心室). Healthy people"s ejection fraction is about 55%. These patients had ejection fraction of under35%. They all had by-pass surgery (搭桥手术) performed on them. Some of the patients had stem cells taken from their hip bones and injected into 25-30 sites in the damaged heart muscle. Six months later their ejection fraction rate was 46.1% while those who just had surgery but no stem cell injections averaged 37.2%. No side effects were reported. Heart failure is a common problem all over the world. In the UK alone about 650,000 people suffer from heart failure every year. As the number of people suffering from heart failure increases in the world in general these findings are particularly significant. Current treatments relieve the symptoms. This new stem cell therapy actually repairs the damaged muscle in the heart and has the potential of curing the disease.

单选题Outside-the-classroom Learning Makes a Big Difference Putting a bunch of college students in charge of a $300,000 Dance Marathon, fundraiser surely sounds a bit risky. When you consider the fact that the money is supposed to be given to. Children in need of medical care, you might call the idea crazy. Most student leaders don't want to spend a large amount of time on something they care little about, said 22-year-old University of Florida student Darren Heitner. He was the Dance Marathon's operations officer for two years. Yvonne Fangmeyer, director of the student organization office at the University of Wisconsin, conducted a survey in February of students involved in campus organizations. She said the desire for friendship was the most frequently cited reason for joining. At large universities like Fangmeyer's, which has more than 40,000 students, the students, first of all, want to find a way to "belong in their own comer of campus". Katie Rowley, a Wisconsin senior, confirms the survey's findings. "I wanted to make the campus feel smaller by joining an organization where I could not only get involved on campus but also find a group of friends." All of this talk of friendship, however, does not mean that students aren't thinking about their resumes. "I think that a lot of people do join to 'fatten up their resmne'," said Heitner. "At the beginning of my college career, I joined a few of these organizations, hoping to get a start in my leadership roles." But without passion student leaders can have a difficult time trying to weather the storms that come. For example, in April, several student organizations at Wisconsin teamed up for an event designed to educate students about homelessness and poverty. Student leaders had to face the problem of solving disagreements, moving the event because of rainy weather, and dealing with the university's complicated bureaucracy. "Outside-of the classroom learning really makes a big difference," Fangmeyer said.

单选题 Changes in Museums 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All the people assembled at Mary"s house.

单选题It is no use debating the relative merits of this policy.

单选题The quality and number of a city's public roads offer all excellent means of Ugauging/U its prosperity.

单选题 Diet, Alcohol Linked to Nearly One Third of Cancers Diet is second only to tobacco as a leading (1) of cancer and，along with alcohol，is responsible for nearly one third of cases of the disease (2) 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 (3) , but they know that diet, alcohol and obesity (4) a major role. "Five percent of cancers could be avoided (5) nobody was obese," he said. While tobacco is linked to about 30 (6) of cancer cases, diet is involved in all estimated 25 percent and alcohol (7) about six percent. Obesity raises the (8) of breast, womb, bowel and kidney cancer, while alcohol is known to cause cancers of the mouth, throat and liver. Its dangerous impact is (9) when combined with smoking. Key told the meeting of the charity Cancer Research UK (10) other elements of diet linked to cancer are (11) 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 (12) Early results of the study have revealed that Norway, Sweden and Denmark have the (13) consumption of fruit and vegetables among European countries while Italy and Spain have the highest. Eating at (14) 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 (15) colorectal, breast and prostate.

单选题It is absurd to go out in such terrible weather.

单选题Stinking (发臭的) Buses Stinking buses jam(挤满) the crowded street. Drivers (51) at one another and honk(鸣喇叭)their horns. Smog(烟雾)hurts the eyes and chokes(窒息) the senses. The (52) is Athens at rush hour. The city is in a sorry state of affairs, built (53) a plan, lacking even adequate sewerage facilities (排水设施) ,its 135 square miles packed with 3.7 million people. So great has been the population flow toward the city that neighboring villages stand (54) or nearly so. About 120,000 people from distant provinces move to Athens every year. The migrants come for the few available (55) Because of migration, Athens by the year 2000 will have a population of 6.5 million, more than half the nation. Aside from overcrowding and poor public transport, the biggest (56) facing Athenians are noise and pollution. A government study (57) that Athens was the noisiest city in the world. Smog is almost at killing levels: up to four times the level that the World Health Organization considers safe. Nearly half the pollution comes from cars. (58) high prices for vehicles and fuel, nearly 100,000 automobiles are sold in Greece each year: 3,000 drivers' licenses are (59) in Athens monthly. After decades of neglect, Athens is at (60) getting some attention. In March a government meeting was held to discuss a plan to make the city (61) and clean up its environment. A save-Athens ministry will propose heavy taxes to (62) immigration and a minimum of $5 billion in public spending for Athens alone. A master plan that will move many government offices to the city's (63) is already in the works. Meanwhile, more Greeks (64) moving into Athens. With few parks and few oxygen-producing plants, the city and its citizens are (65) suffocating(窒息).

单选题 The Sea What do you know about the sea? We know that it looks very pretty when the sun is shining on it. We also know that it can be very rough when there is a strong wind. What other things do we know about it? The first thing to remember is that the sea is very big. When you look at the map of the world you will find there is more water than land. The sea covers three quarters of the world. The sea is also very deep in some places. It is not deep everywhere. Some parts of the sea are very shallow. But in some places the depth of the sea is very great. There is one spot, near Japan, where the sea is nearly 11 kilometers deep! The highest mountain in the world is about 9 kilometers high. If that mountain were put into the sea at that place, there would be 2 kilometers of water above it! What a deep place! If you have swum in the sea, you know that it is salty. You can taste the salt. Rivers, which flow into the sea, carry salt from the land into the sea. Some parts of the sea are saltier than other parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers cannot sink! Fish cannot live in the Dead Sea! In most parts of the sea, there are plenty of fishes and plants. Some live near the top of the sea. Others live deep down. There are also millions of tiny living things that float in the sea. These floating things are so small that it is hard to see them. Many fish live by eating these. The sea can be very cold. Divers who go deep down in the sea, know this. On the top the water may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing happens. When the diver goes deeper, the water above presses down on him. It squeezes him. Then the diver has to wear clothes made of metal. But he cannot go very deep. Some people who wanted to go very deep used a very strong diving ship! They went down to the deepest part of the sea in it. They went down to a depth of eleven kilometers!

单选题It"s prudent to start any exercise program gradually at first.

单选题Michael is now merely a good friend.