单选题Solar energy is generated as protons fuse to form helium atoms.A. bredB. conceivedC. developedD. produced

单选题It is {{U}}postulated{{/U}} that a cure for the disease will have been found by the year 2015. A. challenged B. assumed C. deducted D. decreed

单选题This equipment can produce {{U}}vivid{{/U}} images of the organs of the patient for doctors to analyze. A. dim B. blurry C. beautiful D. graphic

单选题They can put up with the poor living condition.A. tolerateB. acceptC. supportD. refuse

单选题Apart from the Second World War period the Winter Olympics were held every four years, a few months before the summer Olympics. But in 1986 the IOC changed the schedule so that the summer and winter games would be held in different years. Thus, for the only time in history, the Lillehammer (Norway) Games took place just two years after the previous Winter Olympics which were held in Alvertville, France. The Winter Olympics were interruped only for the Second World War in history.A. RightB. WrongC. Not mentioned

单选题I seldom watch TV.

单选题 下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题。{{B}}第一篇{{/B}} {{B}}Multivitamins Urged for All Pregnant Women{{/B}} A recent study in Tanzania found that when pregnant women took vitamins every day, fewer babies were born too small. Babies that weigh less than two and one-half kilograms at birth have a greater risk of dying. Those that survive are more likely to experience problems with their development. And experts say that as adults they have a higher risk of diseases including heart disease and diabetes. The World Health Organization estimates that every year twenty million babies are born with low birth weight. Nine out of ten of them are born in developing countries. The new study took place in Dar es Salaam. 4,200 pregnant women received multivitamins. The pills contained all of the vitamins in the B group along with vitamins C and E. They also contained several times more iron and folate than the levels advised for women in developed nations. Pregnant women especially in poor countries may find it difficult to get enough vitamins and minerals from the foods in their diet. The scientists compared the findings with results from a group of 4,000 women who did not receive the vitamins. A report by the scientists, from the United States and Tanzania, appeared in the New England Journal of Medicine. Wafaie Fawzi of the Harvard University School of Public Health4 led the study. None of the women in the study had HIV, the virus that causes AIDS. The scientists reported earlier that daily multivitamins were a low-cost way to reduce fetal deaths in pregnant women infected with5 HIV. The earlier work in Tanzania also found improvement in the mothers in their number of blood cells known as lymphocytes. Lymphocytes increase the body's immunity against infection. The new study in pregnant women who were not infected with the AIDS virus found that multivitamins reduced the risk of low birth weight. Just under eight percent of the babies born to women who took the multivitamins weighed less than 2,500 grams. The rate was almost nine and one-half percent in the group of women who received a placebo, an inactive pill, instead of the vitamins. But the vitamins did not do much to reduce the rates of babies being born too early or dying while still a fetus. Still, the researchers say multivitamins should be considered for all pregnant women in developing countries.

单选题A Biological Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells 1 when to form flowers and when the flowers should open. It tells 2 when to leave the protective cocoons and fly away, and it tells animals and human beings when to eat, sleep and wake. Events outside the plant and animal 3 the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur 4 the number of hours of daylight. In the short 5 of winter, its fur becomes white. The fur becomes gray brown in color in the longer hours of daylight in summer. Inner signals control other biological clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration 6 twice each year. Birds 7 flying become restless when it is time for the trip, 8 they become calm again when the time of the flight has ended. Scientists say they are beginning to learn which 9 of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain 10 to control the timing of some of our actions. These 11 tell a person when to 12 , when to sleep and when to seek food. Scientists say there probably are other biological clock cells that control other body activities. Dr. Moorhead is studying 13 our biological clocks affect the way we do our work. For example, most of us have great difficulty if we must often change to different work hours. 14 can take many days for a human body to accept the major change in work hours. Dr. Moorhead said industrial officials should have a better understanding of biological clocks and how they affect workers. He said 15 understanding could cut sickness and accidents at work and would help increase a factory"s production.

单选题Bringing Nanotechnology to Health Care for the Poor Nanotechnotogy uses matter at the level of molecules and atoms. Researchers are finding different uses for particles with a length of one nanometer, or one-billionth of a meter. These include things like beauty products and dirt-resistant clothing. But one area where many experts believe nanotechnology holds great promise is medicine. Last week, speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries. The program took place at the Woodrow Wilson International Center for Scholars. Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to confirm cases of malaria. He says it could offer a better way than the traditional process of looking at a person"s blood under a microscope. In poor countries, this process is often not followed. As a result, sick people may get treated for malaria even if they do not have it. Such misuse of medicines can lead to drug resistance. Quantum dots are particles that give off light when activated. Researchers are studying ways to program them to identify diseases by lighting up in the presence of a targeted molecule. Experts say nanotechnology shows promise not just for diagnosing diseases, but also for treating them. Piotr Grodzinski, Professor of the National Institutes of Health, talked about how nanotechnology could make drugs more effective. He talked about cancer drugs already developed with nanotechnology. He says if a drug can target a cancer locally in the body, then much less of it might be needed, and that means lower side effects. Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. He noted that Brazil, India, China and South Africa are currently doing nanotechnology research that could help poor countries. But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles. Experts say more investment in research is needed to better understand these risks.

单选题We consume a lot more than we are able to produce.

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}} Outside-the-classroom Learning Makes a Big Difference Putting a bunch of college students in charge of a $ 300,000 Dance Marathon, fundraiser sure lysounds 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 a bout, 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 cam pus 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 resume' ," 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 de signed 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They were ready to die for their beliefs.A. willingB. goingC. pleasedD. reluctant

单选题It took me a whole hour to solve the problem. A. work at B. work on C. work out D. work over

单选题It is difficult to understand this kind of complicated calculation.A. exultantB. complexC. petulantD. varied

单选题I'm Sorry, I Won't Apologize Almost daily, news reports include accounts of public figures or heads of companies being forced to say they're sorry. In a recent case, Marge Schott, managing partner of the Cincinnati Reds, at first did not want to apologize for her remark that Hitler "was good at the beginning but he just went too far. "Under pressure, she finally said that she regretted her remarks "offended many people. "Predictably-and especially given her history with such comments-many were not satisfied with this response and successfully lobbied for her resignation. This particular use of "I'm sorry" has a familiar ring. The other day my husband said to me, "I'm sorry I hurt your feelings. "I knew he was really trying. He has learned, through our years together, that apologies are important to me. But he was grinning, because he also knew that "I'm sorry I hurt your feelings" left open the possibility-indeed, strongly suggested-that he regretted not what he did but my emotional reaction. It sometimes seems that he thinks the earth will open up and swallow him if he admits fault. It may appear that insisting someone admit fault is like wanting him to humiliate himself. But I don't see it that way, since it's no big deal for me to say I made a mistake and apologize. The problem is that it becomes a big deal when be won't. This turns out to be similar to the Japanese view. Following a fender bender, according to a Times article, the Japanese typically get out of their cars and bow, each claiming responsibility. In contrast, Americans are instructed by their insurance companies to avoid admitting fault. When an American living in Japan did just that-even though he knew he was to blame-the Japanese driver "was so incensed by the American's failure to show contrition that be took the highly unusual step of suing him. " The Japanese driver and I are not the only ones who are offended when someone obviously at fault doesn't just less up and apologize. A woman who lives in the country told me of a similar reaction. One day she gave her husband something to mail when he went into town. The next day, when they left the house together, she found her unmailed letter in the car. He said, "Oh, I forgot to mail your letter. "She was furious-not because he had forgotten, but because be didn't apologize.

单选题The chairman proposed that we should stop the meeting.

单选题 Crystal Ear One day a friend asked my wife Jill if I wanted a hearing aid. "He certainly does," replied Jill. After hearing about a remarkable new product, Jill finally got up me nerve to ask me if I'd ever thought about getting a heating aid. "No way." I said. "It would make me look 20 years older." "No, no," she replied. "This is entirely different. It's Crystal Ear!" Jill was tight. Crystal Ear is different—not the old-styled body worn or over—the—ear aid, but an advanced personal sound system so small that it's like contacts (隐形眼镜) for your ears. And Crystal Ear is super sensitive and powerful, too. You will hear sounds your ears have been missing for years. Crystal Ear will make speech louder, and the sound is pure and natural. I couldn't believe how tiny it is. It is smaller than the tip of my little finger and it's almost invisible when worn. There are no wires, no behind-the-ear device. Put it in your ear and its ready-to wear mold (形状) fits comfortably. Since it's not too loud or too fight, you may even forget that you're wearing it! Use it at work or at play. And if your hearing problem is worse in certain situations, use Crystal Ear only when you need it. Hearing loss, which occurs typically prior to teenage years, progresses throughout one's life time. Although hearing loss is now the world's number one health problem, nearly 90 percent of people suffering hearing loss choose to leave the problem untreated. For many millions, treating hearing loss in a conventional way can involve numerous office visits, expensive testing and adjustments to fit your ear. Thanks to Crystal Ear, the "sound solution" is now convenient. Almost 90 percent of people with mild hearing loss, and millions more with just a little hearing drop-off, can be dramatically helped with Crystal Ear. Moreover, its superior design is energy-efficient, so batteries can last months. Crystal Ear is now available to help these people treat their hearing loss with a small heating amplifier(放大器).

单选题 下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。{{B}}第一篇{{/B}} Trying to Find a Partner One of the most striking findings of a recent poll in the UK is that of the people interviewed, one in two believes that it is becoming more difficult to meet someone to start a family with. Why are many finding it increasingly difficult to start and sustain intimate relationships? Does modern life really make it harder to fall in love? Or are we making it harder for ourselves? It is certainly the case today that contemporary couples benefit in different ways from relationships. Women no longer rely upon partners for economic security or status. A man doesn't expect his spouse to be in sole charge of running his household and raising his children. But perhaps the knowledge that we can live perfectly well without a partnership means that it takes much more to persuade people to abandon their independence. In theory, finding a partner should be much simpler these days. Only a few generations ago, your choice of soul mate (心上人) was constrained by geography, social convention and family tradition. Although it was never explicit, many marriages were essentially arranged. Now those barriers have been broken down. You can approach a builder or a brain surgeon in any bar in any city on any given evening. When the world is your oyster (牡蛎), you surely have a better chance of finding a pearl. But it seems that the old conventions have been replaced by an even tighter constraint: the tyranny of choice. The expectations of partners are inflated to an unmanageable degree: good looks, impressive salary, kind to grandmother, and right socks. There is no room for error in the first impression. We think that a relationship can be perfect. If it isn't, it is disposable. We work to protect ourselves against future heartache and don't put in the hard emotional labor needed to build a strong relationship. Of course, this is complicated by realities. The cost of housing and child-rearing creates pressure to have a stable income and career before a life partnership.

单选题Keep your room tidy .

单选题Her faith upheld her in times of sadness.