单选题We are {{U}}engaged{{/U}} in the interdisciplinary field of the science and technology of materials.

单选题If human beings didn"t perspire , they would die in five minutes.

单选题Do you follow what I am saying?

单选题My camera can be adjusted to take pictures in cloudy or sunny conditions.

单选题The more grandiose the sales pitch, the wore sceptical many senior {{U}}executives{{/U}} become about the value of the lastest wave of 'decision-support software' on offer.

单选题U.S. to Start $3.2 Billion Child Health Study in January A study that will cost $3.2 billion and last more than two decades to track the health of 100,000 U. S. children from before birth to age 21 will be launched in January, U. S. health officials said on Friday. Officials from the U. S. government"s National Institutes of Health said they hope the study, to be conducted at 105 locations throughout the United States, can help identify early-life influences that affect later development, with the goal of learning new ways to treat or prevent illness. The study will examine hereditary and environmental factors such as exposure to certain chemicals that affect health. Researchers will collect genetic and biological samples from people in the study as well as samples from the homes of the women and their babies including air, water, dust and materials used to construct their residences, the NIH said. Officials said more than $ 200 million has been spent already and the study is projected to cost $ 3.2 billion. "We anticipate that in the long term, what we learn from the study will result in a significant savings in the nation"s health care costs," Dr. Duane Alexander, who heads the NIH"s Eunice Kennedy Shriver National Institute of Child Health and Human Development, told reporters. The study will begin in January when the University of North Carolina and the Mount Sinai School of Medicine in New York start signing up pregnant women whose babies will then be followed to age 21. Some of the early findings will be about factors behind pre-term birth, which has become more common in recent years, according to Dr. Peter Scheidt of the NIH, who heads the study. The people taking part will be from rural, urban and suburban areas, from all income and educational levels and from all racial groups, the NIH said.

单选题Could you please {{U}}arrange{{/U}} an appointment for me to see Mr. Smith?

单选题We have to act within the existing legal U framework/U．

单选题The job that had been offered to George in Birmingham paid better.

单选题Henry cannot resist the lure of drugs.

单选题After receiving her cheque, Sue Uendorsed/U it and took it to the bank.

单选题He endured great pain before he finally expired .

单选题{{B}}第三篇{{/B}} {{B}}Smart Exercise{{/B}} 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The benzene molecule contains six carbon atoms joined together in the form of a six-sided ring.A. representedB. connectedC. containedD. included

单选题Need for Emphasis on Treatment AIDS programs in developing countries put too little emphasis on treatment, the World Health Organization said Tuesday, asking for more small community-based clinics to be opened to treat HIV-infected people. An estimated 36 million to 46 million people are living with AIDS, two-thirds of them in Africa, but only 440,000 people in developing countries were receiving treatment by the end of 2003, the UN health agency said in its annual report. "Without treatment, all of them will die a premature and in most cases painful death," the WHO said in the 169-page World Health Report. WHO Director General Lee Jong-wook said community-based treatment should be added to disease prevention and care for sufferers in AIDS programs. "Future generations will judge our time in large part by our response to the AIDS disease," Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs of today and tomorrow. This is a historic opportunity we cannot afford to miss," he added. Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment, which was about $10,000 when the drugs were first developed, has dropped to about $150. Treatment programs also help AIDS prevention efforts, the report said, citing great demands for testing and counseling where treatment has been made available. Good counseling in turn leads to more effective prevention in those who are uninfected, and significantly reduces the potential for HIV carriers to pass on the infection, the report said. Since its discovery in the 1980s, more than 20 million have died of AIDS, mostly in poor countries.

单选题Don"t hazard your reputation by supporting his joint venture with the gay from Los Angels.

单选题It has been said that the Acts provided a new course of action and did not merely regulate or enlarge an old one.

单选题 Many Women Who Beat Cancer Don't Change Habits Many women who battle breast cancer will tell you it's a life-changing experience. However, a new study shows that for many {{U}} {{U}} 1 {{/U}} {{/U}}, the changes aren't always positive or permanent. Beth Snoke has watched her mother and both grandmothers battle and survive breast {{U}} {{U}} 1 {{/U}} {{/U}}. So when she was diagnosed, there was no doubt in her mind {{U}} {{U}} 3 {{/U}} {{/U}}she had to do. "I do exactly what the doctors say as far as the medicine that I'm on, as {{U}} {{U}} 4 {{/U}} {{/U}}as the vitamins, the diet, and the fitness. And I can't stress enough {{U}} {{U}} 5 {{/U}} {{/U}}important that is," says Beth Snoke. But a surprising new study shows that {{U}} {{U}} 6 {{/U}} {{/U}}every woman who beats breast cancer is getting that message. In fact, nearly 40% of them say even {{U}} {{U}} 7 {{/U}} {{/U}}surviving breast cancer, they haven't made significant changes in the {{U}} {{U}} 8 {{/U}} {{/U}}they eat or how much they exercise. "Not all survivors are taking advantage of this teachable moment and making positive health changes in {{U}} {{U}} 9 {{/U}} {{/U}}life," says Electra Paskett, PhD, at Ohio State University's Comprehensive Cancer Center. Paskett says diet and exercise have been proven to not only help women feel better during and after treatment, they may {{U}} {{U}} 10 {{/U}} {{/U}}play a role in preventing some cancers from coming back. {{U}} {{U}} 11 {{/U}} {{/U}}growing evidence, some women just aren't listening. "Colon cancer survivors {{U}} {{U}} 12 {{/U}} {{/U}}exercise have actually been shown to have improved survival rates. So, yes, it is true that perhaps by making some of these healthy choices we can actually increase their health," says Paskett. As a breast cancer survivor {{U}} {{U}} 13 {{/U}} {{/U}}, Paskett knows first hand how much difference diet and exercise can {{U}} {{U}} 14 {{/U}} {{/U}}. The challenge, she says, is to get more survivors to be more like Beth, during and after treatment. Experts say exercising more and eating a healthier diet can also cut {{U}} {{U}} 15 {{/U}} {{/U}}on stress and help women overcome depression. There are more than 2 million breast cancer survivors living in the U.S. of those, nearly a million have yet to change their diet or exercise routines.

单选题I had some difficulty in carrying out the plan.

单选题 阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子作出判断。如果该句提供的是正确信息，请选择A项；如果该句提供的错误信息，请选择B项；如果该句的信息文章中没有提及，请选择C项。 {{B}} Stomach Ulcer{{/B}} Stomach ulcers are the cause of severe pain for many people. Doctors have been able to help lessen the pain of ulcers. 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 often is called heart bum. 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 ulcers were caused by unusually strong stomach fluids, which damaged stomach tissue. Now they have discovered that most ulcers are caused by a bacterial organism called Hillico Bactor Pilorie or H. Pillorie. H. Pillorie 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 ulcers an save thousands of millions of dollars in medical costs. They also believe curing 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 ulcer if his or her family has had one. In fact a person with the family history of ulcers is three times more likely to get one than other people. There are ways people can protect themselves from developing an 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.