单选题I am heartily grateful to your help.

单选题Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour.

单选题They have the capability to destroy the enemy in a few days.

单选题We should {{U}}contemplated{{/U}} the problem from all sides. A. deliberated B. thought C. described D. designed

单选题El Nino While some forecasting methods had limited SUCCESS predicting the 1997 E1 Nino a few months in advance, the Columbia University researchers say their method call predict large E1 Nonevents up to two years in advance. That would be good news for governments, farmers and others seeking to plan for the droughts and heavy rainfall that E1 Nino can produce in various parts of the world. Using a computer the researchers matched sea-surface temperatures to later E1 Ni?o occurrences between 1980 and 2000 and were then able to anticipate E1 Nino events dating back to 1857, using prior sea-surface temperatures. The results were reported in the latest issue of the journal Nature. The researchers say their method is not perfect, but Bryan C. Weare, a meteorologist at the University of California, Davis, who was not involved in the work, said it "suggests E1 Nino is indeed predictable." "This will probably convince others to search around more for even better methods." Said Weare. He added that the new method "makes it possible to predict E1 Nino at long lead times."Other models also use sea-surface temperatures, but they have not looked as far back because they need other data, which is only available for recent decades, Weare said. The ability to predict the warming and cooling of the Pacific is of immense importance. The 1997 EL Nino, for example, caused an estimated $20 billion in damage worldwide, offset by beneficial effects in other areas. The 1877 E1 Nino, meanwhile, coincided with a failure of the Indian monsoon and a famine that killed perhaps 40 million in India and China, prompting the development of seasonal forecasting, Anderson said. When E1 Nino hit in 1991 and 1997. 200 million people were affected by flooding in Chinaalone, according to a 2002 United Nations report. While predicting smaller E1 Nino events remains tricky. The ability to predict larger ones should be increased to at least a year if the new method is confirmed. E1 Nino tends to develop between April and June and reaches its peak between December and February. The warming tends to last between 9 and 12 months and occurs every two to seven years. The new forecasting method does not predict any major E1 Nino events in the next two years,although a weak warming toward the end of this year is possible.

单选题It seems highly unlikely that she will pass the exam.

单选题The whole neighborhood has been equipped with facilities for recycling household refuse.

单选题You may assess a victim's condition by all the following EXCEPT

单选题2. "Don't Drink Alone" Gets New Meaning In what may be bad news for bars and pubs, an European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those taking their libations (饮酒) with food. Luigino Dal Maso and his colleagues studied the drinking patterns of 1,500 patients from four cancer studies and another 3,500 adults who had never had cancer. After the researchers accounted for the amount of alcohol consumed, they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity (口腔), pharynx (咽), and esophagus (食道), when compared with people who drank only at meals. Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal (喉) cancer. "Roughly 95 percent of cancers at these four sites traced to smoking or drinking by study volunteers," Dal Maso says. The discouraging news his team reports, is that drinking with meals didn' t eliminate cancer risk at any of the sites. For their new analysis, the European scientists divided people in the study into four groups, based on how many drinks they reported having in an average week. The lowest - intake group included people who averaged up to 20 drinks a week. The highest group reported downing at least 56 servings of alcohol weekly for an average of eight or more per day. Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals. For instance, compared with people in the lowest - consumption group, participants who drank 21 to 34 alcohol servings a week at least doubled their cancer risk for all sites other than the larynx. If people in these consumption groups took some of those drinks outside meals, those in the higher consumption group at least quadrupled (翻两番) their risk for oral cavity and esophageal cancers. People in the highest- consumption group who drank only with meals had 10 times the risk of oral cancer, 7 times the risk of pharyngeal cancer, and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals. In contrast, laryngeal cancer risk the high - intake, with - meals - only group was only triple that in the low - intake consumers who drank with meals. "Alcohol can inflame tissues (组织). Over time, that inflammation can trigger cancer. " Dal Maso says. He suspects that food reduced cancer risk either by partially coating digestive - tract tissues or by scrubbing alcohol off those tissues. He speculates that the reason laryngeal risks were dramatically lower for all study participants traces to the tissue' s lower exposure to alcohol.

单选题Attitudes to mental illness have Ushifted/U in recent years.

单选题Adaptation of Living Things Certain animals and plants develop characteristics that help them cope with their environment better than others of their kind. This natural biological process is called adaptation. Among the superior characteristics developed through adaptation are those that may help in getting food or shelter, in providing protection, and in producing and protecting the young. That results in the evolution of more and more organisms(生物体) that are better fitted to their environments . Each living thing is adapted to its way of life in a general way, but each is adapted especially to its own distinct class. A plant, for example, depends upon its roots to fix itself firmly and to absorb water and inorganic chemicals(无机物). It depends upon its green leaves for using the sun"s energy to make food from inorganic chemicals. These are general adaptations, common to most plants. In addition, there are special adaptations that only certain kinds of plants have. Many animals have adaptations that help them escape from their enemies. Some are hidden by their body color or shape, and many look like a leaf or a little branch. The coats of deer are colored to mix with the surroundings. Many animals have the ability to remain completely still when an enemy is near. Organisms have a great variety of ways of adapting. They may adapt in their structure, function, and genetics; in their development and production of the young; and in other respects. An organism may create its own environment, as do warm-blooded mammals (哺乳动物), which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather. Usually adaptations are an advantage, but sometimes an organism is so well adapted to a particular environment that if conditions change, it finds it difficult or impossible to readapt to the new conditions.

单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供 的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 Dyslexia(阅读障碍) As many as 20% of all children in the United States suffer from some form of the learning disorder called dyslexia. Experts on dyslexia say that the problem is not a disease. They say that persons with dyslexia use information in a different way. One of the world's great thinkers and scientists, Albert Einstein was dyslexic. Einstein said that he never thought in words the way that most people do. He said that he thought in pictures instead. The American inventor Thomas Edison was also dyslexic. Dyslexia first was recognized in Europe and the United States more than 80 years ago. Many years passed be fore doctors discovered that persons with the disorder were not mentally slow or disabled. The doctors found that the brains of persons with dyslexia are different. In most people, the left side of the brain the part that controls language is larger than the right side. In persons with dyslexia, the right side of the brain is bigger. Doctors are not sure what causes this difference. However, research has shown that dyslexia is more common in males than in females, and it is found more often in persons who are left handed. No one knows the cause of dyslexia, but some scientists believe that it may result from chemical changes in a baby's body long before it is born. They are trying to find ways to teach per sons with dyslexia. Dyslexic persons think differently and need special kinds of teaching help. After they have solved their problems with language, they often show themselves to be especially intelligent or creative.

单选题Parents should realized that "example is better than {{U}}precept{{/U}}".

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

单选题This is not typical of English, but is a feature of the Chinese language.

单选题The book provides a concise analysis of the country"s history.

单选题He felt at a loss when he stayed with his aunt.A. lostB. confusedC. wordedD. satisfied

单选题The physicians in a hospital are less important than the nursing staff.

单选题Gary Finkle had his spinal cord(脊髓)severely injured in a swimming-pool accident seven years ago. A heavy-set, bearded man of 27, he is one of thousands of Americans who have lost virtually all feeling and movement from their shoulders down. He lives with his wife, Micky, and a female monkey named Jo outside the village of Andes, N.Y. Gary is a participant in a remarkable enterprise called Helping Hands: Simian Aides for the Disabled. The nonprofit organization supplies the disabled with trained monkeys that reduce the disabled person's dependency on family, friends and hired attendants. Using his mouth, Gary controls a small laser pointer mounted on his wheelchair. With it, he directs Jo to change books or magazines in his reading stand or to get him tapes for the cassette player. She brings him drinks from a refrigerator and clears away empties. When asked, Jo will fetch the remote control for the TV and place it on Gary's working table where he can operate it with his mouth-stick. The mouth-stick is a quadriplegic's(瘫痪者)primary tool. It can be used for practically everything: turning the pages of a book, dialing the telephone, changing channels on the TV, working at a typewriter or computer. If Gary's mouth-stick drops to the floor. Jo will pick it up and gently reinsert it into his mouth. "I can't imagine living without her," Gary says. He will always need human assistance for such things as getting in and out of bed, bathing or changing his clothes. But having Jo lessens his reliance on Micky, enabling her to do things in town without worrying about her husband's welfare.

单选题The two parties finally agreed to collaborate with each other.A. operateB. conductC. leadD. cooperate