单选题John doesn't believe in traditional medicine; he has some remedies of his own.A. correctB. regularC. commonD. conventional

单选题When We Are Asleep Everyone dreams, but some people never recall their dreams, or do so very rarely. Other people always wake up with vivid recollections (记忆) of their dreams, though they forget them very quickly. In an average night of eight hours' sleep, an average adult will dream for around one hundred minutes, probably having three to five dreams, each lasting from ten to thirty minutes. Scientists can detect when someone is having a dream by using an instrument which measures the electrical waves in the brain. During dreaming, these waves move more quickly. Breathing and pulse rate also increase, and there are rapid eye movements under the lids, just as though the dreamer were really looking at moving objects. These signs of dreaming have been detected in all mammals (哺乳动物) studied, including dogs, monkeys, cats, and elephants, and also some birds and reptiles (爬行动物). This period of sleep is called the "D" state. Babies experience the "D" state for around 50% of their sleep; the period reduces to around 25% by the age of 10. Dreams take the form of stories, but they may be strange and with incidents not connected, which make little sense. Dreams are seldom without people in them and they are usually about people we know. One estimate says that two-thirds of the "cast" of our dream dramas are friends and relations. Vision seems an essential part of dreams, except for people blind from birth. Sound and touch are senses also often aroused, but smell and taste are not frequently involved. In "normal" dreams, the dreamer may be taking part, or be only an observer. But he or she cannot control what happens in the dream. However, the dreamer does have control over one type of dream. This type of dream is called a "lucid" (清醒的) dream. Not everyone is a lucid dreamer. Some people are occasional lucid dreamers. Others can dream lucidly more or less all the time. In a lucid dream, the dreamer knows that he is dreaming.

单选题 Students Learn Better with Touchscreen Desks Observe the criticisms of nearly any major public education system in the world, and a few of the many complaints are more or less universal. Technology moves faster than the education system. Teachers must teach at the pace of the slowest student rather than the fastest. And—particularly in the United States—grade school children as a group don't care much for, or excel at, mathematics. So it's heartening to learn that a new kind of "classroom of the future" shows promise at mitigating some of these problems, starting with that fundamental piece of classroom furniture: the desk. AUK study involving roughly 400 students, mostly aged 8-10 years, and a new generation of multi- touch, multi-user, computerized desktop surfaces is showing that over the last three years the technology has appreciably boosted students' math skills compared to peers learning the same material via the conventional paper-and-pencil method. How? Through collaboration, mostly, as well as by giving teachers better tools by which to micromanage individual students who need some extra instruction while allowing the rest of the class to continue moving forward. Science, Clay Dillow, classroom of the future, education, engineering, math, mathematics, Synergy Net Traditional instruction still shows respectable efficacy at increasing students fluency in mathematics, essentially through memorization and practice—dull, repetitive practice. But the researchers have concluded that these new touch screen desks boost both fluency and flexibility—the critical thinking skills that allow students to solve complex problems not simply through knowing formulas and devices, but by being able to figure out what there all problem is and the most effective means of stripping it down and solving it. One reason for this, the researchers say, is the multi-touch aspect of the technology. Students working in the next-gen classroom can work together at the same tabletop, each of them contributing and engaging with the problem as part of a group. Known as Synergy Net, the software uses computer vision systems that see in the infrared spectrum to distinguish between different touches on different parts of the surface, allowing students to access and use tools on the screen, move objects and visual aids around on their desktops, and otherwise physically interact with the numbers and information on their screens. By using these screens collaboratively, the researchers say, the students are to some extent teaching themselves as those with a stronger grasp on difficult concepts pull other students forward along with them.

单选题Rise in Number of Cancer Survivors Cancer is the second leading cause of death in the United States, after heart disease. In the 1 , it was often considered a death sentence. But many patients now live longer 2 of improvements in discovery and treatment. Researchers say death 3 in the United States from all cancers combined have fallen for thirty years. Survival rates have increased for most of the top fifteen cancers in both men and women, and for cancers in 4 . The National Cancer Institute and the Centers for Disease Control and Prevention studied the number of cancer survivors. A cancer survivor is defined 5 anyone who has been found to have cancer. This would include current patients. The study covered the period 6 1971 to 2001. The researchers found there are three 7 as many cancer survivors today as there were thirty years ago. In 1971, the United States had about three-million cancer 8 . Today there are about ten-million. The study also found that 64% of adults with cancer can expect to still be 9 in five years. Thirty years ago, the five-year survival rate was 50%. The government wants to 10 the five-year survival rate to 70% by 2010. The risk of cancer increases with age. The report says the majority of survivors are 65 years and 11 . But it says medical improvements have also helped children with cancer live 12 longer. Researchers say 80% of children with cancer will survive at least five years after the discovery. About 75% will survive at 13 ten years. In the 1970s, the five-year survival rate for children was about 50%. In the 1960s, most children did not survive cancer. Researchers say they 14 more improvements in cancer treatment in the future. In fact, they say traditional cancer-prevention programs are not enough anymore. They say public health programs should also aim to support the 15 numbers of cancer survivors and their families.

单选题He talks tough but has a tender heart.

单选题The Now Rich and the Old Rich Though it is mere 1 to 3 percent of the population, the upper class possesses at least 25 percent of the nation"s wealth. This class has two segments: upper-upper and lower-upper. Basically, the upper-upper class is the "old rich"—families that have been wealthy for several generations and aristocracy of birth and wealth. Their names are in the Social Register, a listing of acceptable members of high society. A few are known across the nation, such as the Rockfellers, Roosevelts, and Vanderbilts. Most are not visible to the general public. They live in grand seclusion (深居简出), drawing their income from the investment of their inherited wealth. In contrast, the lower-upper class is the "new rich". Although they may be wealthier than some of the old rich, the new rich have hustled (急于做) to make their money like everybody else beneath their class. Thus their prestige is generally lower than that of the old rich, who have not found it necessary to lift a finger to make their money, and who tend to look down upon the new rich. However its wealth is acquired, the upper class is very, very rich. They have enough money and leisure time to cultivate an interest in the arts and to collect rare hooks, painting, and sculpture. They generally live in exclusive areas, belong to exclusive social clubs, communicate with each other, and marry their own kind—all of which keeps them so distant from the masses that they have been called the out-of-sight class. They also command an enormous amount of power and influence here and abroad, as they hold many top government positions, run the Council on foreign relations, and control multinational corporations. Their actions affect the lives of millions.

单选题The government proposed changes to the voting system.

单选题Where Did All the Ships Go The Bermuda Triangle is one of the greatest mysteries of the sea. In this triangle area between Florida, Puerto Rico and Bermuda in Atlantic, ships and airplanes seem to disappear more of ten than in other pans of the ocean. And they do so without leaving any sign of all accident or any dead bodies. It is said that Christopher Columbus was the first person to record strange happenings in the area. His compass stopped working, a flame came down from the sky, and a wave 100 to 200 feet high carried his ship about a mile away. The most famous disappearance in the Bermuda Triangle was the U. S. Naval Air Flight 19. On December 5, 1945, five bomber planes carrying 14 men took offon a training mission from the Florida coast. Later that day, all communications with Flight 19 were lost. They just disappeared without a trace. The next morning, 242 planes and 19 ships took part in the largest air-sea search in history. But they found nothing. Some people blame the disappearances on supernatural forces. It is suggested the missing ships and planes were either transported to other times and places, kidnapped by aliens or attacked by sea creatures. There are also natural explanations, though. The U. S. Navy says that the Bermuda triangle is one of two places on earth where a magnetic compass points towards true north instead of magnetic north. Therefore, planes and ships can lose their way if they don't make adjustments. The area also has changing weather and is known for its high waves. Storms can turn up suddenly and destroy a plane or ship. Fast currents could then sweep away any trace of an accident.

单选题 The Emic and Etic Approaches Researchers who are unfamiliar with the cultural and ethnic groups they are studying must take extra precautions to shed any biases they bring with them from their own culture. For example, they must make sure they construct measures that are meaningful for each of the cultural or ethnic minority groups being studied. In conducting research on cultural and ethnic minority issues, investigators distinguish between the emic approach and the etic approach. In the emic approach, the goal is to describe behavior in one culture or ethnic group in terms that are meaningful and important to the people in that culture or ethnic group, without regard to other cultures or ethnic groups. In the etic approach, the goal is to describe behavior so that generalizations can be made across cultures. If researchers construct a questionnaire in an emic fashion, their concern is only that the questions are meaningful to the particular culture or ethnic group being studied. If, however, the researchers construct a questionnaire in an etic fashion, they want to include questions that reflect concepts familiar to all cultures involved. How might the emic and etic approaches be reflected in the study of family processes? In the emic approach, the researchers might choose to focus only on middle-class White families, without regard to whether the information obtained in the study can be generalized or is appropriate for ethnic minority groups. In a subsequent study, the researchers may decide to adopt an etic approach by studying not only middle-class White families, but also lower-income White families, Black American families, Spanish American families, and Asian American families. In studying ethnic minority families, the researchers would likely discover that the extended family is more frequently a support system in ethnic minority families than in White American families. If so, the emic approach would reveal a more different pattern of family interaction than would the etic approach, documenting that research with middle class White families cannot always be generalized to all ethnic groups.

单选题I don"t know if the painting is authentic .

单选题To protect our ecosystems we should not use more than _________.

单选题The shopkeeper gave us short weight : we got 9 kilos instead of 10 kilos.

单选题I hope you can submit you term papers before the deadline.A. hand inB. hand outC. hand onD. handback

单选题It is convenient to purchase on line.

单选题The Threat to Kiribati The people of Kiribati are afraid that one day in the not-too-distant future, their country will disappear from the face of the earth literally. This year, the Pacific island nation has been flooded by sudden high tide several times. These tides, which swept across the island and destroyed houses, came when there was neither wind nor rain. "This never happened before," say the older citizens of Kiribati. What is causing these mysterious high tides? The answer may well be global warming. When fuels like oil and coal are being burned, pollutants (污染物) are released; these pollutants trap heat in the earth"s atmosphere. Warmer temperatures cause water to expand and also create more water by melting glaciers (冰川) and polar (极地的) ice caps. If the trend continues, the scientists say, many countries will suffer. Bangladesh, for example, might lose one-fifth of its land. The coral (珊瑚) island nations of the Pacific, like Kiribati and the Marshall Islands, however, would face an even worse fate—they would be swallowed by the sea. The loss of these coral islands would be everyone"s loss. Coral formations are home to more species than any other place on earth. The people of these nations feel frustrated. The sea, on which their economies have always been based, is suddenly threatening their existence. They don"t have the money for expensive technological solutions like seawalls. And they have no control over the pollutants, which are being released mainly by activities in large industrialized countries. All they can do is to hope that industrialized countries will take steps to reduce pollution.

单选题Stop Eating Too Much "Clean your plate!" and "Be a member of the clean-plate club!" Just about every kid in the US has heard this from a parent or grandparent. Often, it's accompanied by an appeal: "Just think about those starving orphans (孤儿) in Africa! " Sure, we should be grateful for every bite of food. Unfortunately, many people in the US take too many bites. Instead of staying "clean the plate", perhaps we should save some food for tomorrow. According to news reports, US restaurants are partly to blame for the growing bellies (肚子). A waiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government, according to a USA Today story. Americans traditionally associate quantity with value and most restaurants try to give them that. They prefer to have customers complain about too much food rather than too little. Barbara Rolls, a nutrition (营养) professor at Pennsylvania State University, told USA Today that restaurant portion sizes began to grow in the 1970s, the same time that the American waistline (腰围) began to expand. Health experts have tried to get many restaurants to serve smaller portions. Now, apparently, some customers are calling for this too. The restaurant industry trade magazine QSR reported last month that 57 percent of more than 4,000 people surveyed believed restaurants served portions that were too large; 23 percent had no opinion; 20 percent disagreed. But a closer look at the survey indicates that many Americans who can't afford fine dining still prefer large portions. Seventy percent of those earning at least ＄150,000 per year prefer smaller portions; but only 45 percent of those earning less than ＄25,000 want smaller. It's not that working class Americans don't want to eat healthy. It's just that, after long hours at low-paying jobs, getting less on their plate hardly seems like a good deal. They live from paycheck (薪金支票) to paycheck, happy to save a little money for next year'sChristmas presents.

单选题Musical Training Can Improve Communication Skills American scientists say musical training seems to improve communication skills and language retardation (延迟). They found that developing musical skill involves the 1 process in the brain as learning how to speak. The scientists believe that could 2 children with learning disabilities. Nina Krauss is a neurobiologist at Northwestern University in Illinois. She says musical training 3 putting together different kinds of information, such as hearing music, looking at musical notes, touching an instrument and watching other musicians. This 4 is not much different from learning how to speak. Both involve different senses. She further explains musical training and learning to 5 each make us think about what we are doing. She says speech and music 6 through a structure of the nervous system called the brain stem. The brain stem 7 our ability to hear. Until recently, experts have thought the brain stem could not be developed or changed. 8 Professor Krauss and her team found that musical training can improve a person"s brain stem activity. The study involved individuals with different levels of musical 9 . They were asked to wear an electrical device that measures 10 activity. The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument—the cello (大提琴). Professor Krauss says cellos have sound qualities similar 11 some of the sounds that are important with speech. The study found that the more years of training people had, the more 12 they were to the sound and rhythm of the music. Those who were involved in musical activities were the same people in whom the 13 of sensory events was the strongest. It shows the importance of musical training to children with learning 14 . She says using music to improve listening skills could mean they 15 sentences and understand facial expressions better.

单选题How Men Face the Fat Problem It is a pleasure to see men of a certain age worrying about their weight. Listening to them is not such a pleasure. Because the men are new at the game, they don't hesitate to discuss the fat problem incessantly. However, women of the same age do not discuss the fat problem, especially not in mixed company. They prefer to face the problem with quiet dignity. Discussing the problem might only draw attention to some stray body part that may be successfully tucked away under an article of clothing. The age at which a man begins to explore the fat problem can vary. The actual problem can manifest itself in the early 30's, but broad-range discussion usually starts later. There are early nonverbal symptoms. I've watched the rugged journalist who shares my apartment sneak by with a Diet Coke. His shirts are no longer neatly tucked in to display a trim waist. Recently he has begun to verbalize his anxiety. He tells me, with a sheepish grin, that he is taking his suits to Chinatown to have them "tailored." Still-older men have lost their dignity and rattle on unabashedly. Often, wives and children play important roles in their fat-inspection rituals. Take my oldest brother, a former college football player. His daughter says that several times a day he will stand at attention and call out, "Fat, medium or thin?" She knows the correct answer: medium. Thin would be an obvious stretch, and fat may not get her that new video. According to his wife, he stands in front of the mirror in the morning (before the day's meals take their toll), puts his hands behind his head and lurches into a side bend, then clutches the roll that has developed and says, "Am I getting fatter?" His wife is expected to answer, "You look like you may have lost a few pounds." And then there are the ex-husbands, a pitiful group. They are extremely vocal. When I go to the movies with one, he confides that he is suffering from great hunger because he is dieting. He hasn't eaten since the pancakes and sausages he wolfed down that morning. He pauses in his monologue while he buys his popcorn. After the movie, we sprint to a restaurant, where he again pauses to devour a basket of bread. Before he orders his chaste salad and soup, he grows plaintive. Do I think he's fat?

单选题Some birds consistently return to the same nesting area each spring. A. occasionally B. purposely C. regularly D. surprisingly

单选题{{B}}第二篇{{/B}} {{B}} Attitude Towards New Technology{{/B}} Telecommunications is just one of the means by which people communicate and, such as, we need to look at telecommunications and any other communications technologies within the wider context of human communication activity. Early findings show that many people are uneasy and even fearful of information technology. They seldom use it or simply avoid it. To obtain this type of data we have spent time with individuals, watching how they communicate, where they get confused, what they don't understand, and the many mistakes they make. You can do this type of research yourself in an informal way. Just watch someone at the desk next to you trying to use a phone or trying to fill in a form. What you will quickly notice about people on the phone is that they use very few of the buttons available on the keypad(键区) ,and they get quite anxious if they have to use any buttons outside their normal ones. Most will not use the instruction book, and those that do will not necessarily have a rewarding experience. Watch someone fill out a form, such as an application form or a tax form, and you will see a similar pattern of distressed behaviour. The simple fact we can all observe from how people use these ordinary instruments of everyday communication is how messy, uncertain and confusing the experience can be. From getting up in the morning until you go to bed at night, you can always encounter people getting confused over the use of new technology. Even watching television, which for many provides an antidote(解药) to the daily confusion, is itself filled with a kind of low level confusion. For example, if you ring people up five minutes after the evening news has finished and ask them what the news was about, many cannot remember, and those who do remember get some of it wrong. One of the reasons why this obvious confusion has gone unnoticed is that "communication As a word we associate with success, and therefore we expect the process to work effectively most of the time. To suggest otherwise is to. challenge one of our society's most deeply held beliefs.