单选题Students working toward a degree in business are likely candidates for careers in the banking industry.

单选题Any of the users to the system can gain access to them.A. keyB. passwordC. entryD. control

单选题Twelve years after his marriage, Paul was

单选题Jenny was a very ambitious and energetic person. She didn't have much in common with other girls in her school, however. She played football better than many boys, and unfortunately she made a rather bad impression on many of her teachers. Jenny just didn't act the way they thought a girl should. She studied at a university and later took a job as a typist. Although she was enthusiastic and did her best, she made many mistakes amt was poorly paid. She didn't want to be a typist anyway-she dreamed of becoming a pilot! Jenny moved to London, borrowed some money, and learned to fly. Nobody, however, wanted to hire a female pilot. She decided to fly alone to Australia to prove that she could fly as well as any man. Her parents lent her money to buy an airplane. Jenny set off on July 5, 1928. Her route took her over many places she dreamed of before. She was caught in a sandstorm and had to make an emergency landing in the desert. But she landed in India six days later. She had broken the record to India by two days. Over Burma she ran into a monsoon, and was able to save herself only by landing on a football field. She finally reached Australia. The plane propeller had been broken during her last landing, and she had to crash-land. But Jenny had proved that she could fly-and that a woman could do almost anything she really put her mind to. Jenny Johnson later married the pilot who had come to her rescue in Australia.

单选题Greene spent a brief time at Cambridge.

单选题Attempts to understand the relationship between social behavior and health have their origin in history. Dubos(1969) suggested that primitive humans were closer to the animals in that they, too, relied upon their instincts to stay healthy. Yet some primitive humans recognized a cause and effect relationship between doing certain thing and alleviating (减轻)symptoms of a disease or improving the condition of a wound. Since there was so much that primitive humans did not understand about the functioning of the body, magic became an integral component of the beliefs about the causes arid cutes of health disorders. So it is not surprising that early humans thought that illness was caused by evil spirits. Primitive medicines made from vegetables or animals were invariably used in combination with some form of ritual to expel harmful spirit from a diseased body. One of the earliest attempts in the western world to formulate(系统地阐述)principles of health care based upon rejection of supernatural phenomena is found in the work of the Greek physician Hippocrates. Little is known of Hippocrates who lived around 400 B. C., not even whether he actually authored the collection of books that bears his name. Nevertheless, the writings, attributed to him have provided a number of principles underlying modern practice. One of his most famous contributions, the Hippocratic Oath, is the foundation of contemporary medical ethics(道德). Among other things, it requires the physician to swear that he or she will help the sick, keep oneself from intentional wrong-doing or harm, and keep secret all matters to keep the doctor patient relation-ship. Hippocrates also argued that medical knowledge should be derived from an understanding of the natural sciences and the logic of cause and effect relation-ships. In this classic thesis, On Airs, Waters, and Places, Hippocrates pointed out that human wellbeing is influenced by the totality of environmental factors: living habits or lifestyle, climate, geography of the land, and the quality of air, and food. Interesting enough, concerns about our health and the quality of air, water, and places are still very much written in the twentieth century.

单选题Her mood can be {{U}}gauged{{/U}} by her reaction to the most trivial of incidents:

单选题Home Heating Central heating became popular only after the Civil War. Typically, coal-burning furnaces (火炉) fueled the early systems. Natural gas had developed into the leading fuel by 1960. Its acceptance resulted in part from its wide uses. Because it comes primarily from U.S. and Canadian fields, natural gas is also less vulnerable (脆弱的) than oil is to War. Oil remains the most important fuel in a few areas, such as New England. Electric heating dominates most areas with mild winters and cheap electricity, including the South and the Northwest. It was made popular at least in the South by the low cost of adding electric heating to new houses built with air-conditioning. Bottled gas, which is somewhat more expensive than utility gas, is the fuel of choice in rural areas not served by utility pipelines. Wood is the leading heating fuel in just a few rural counties. Home heating, which accounts for less than 7 percent of all energy consumed in the U.S., has had a commendable (值得赞扬的) efficiency record: from 1978 to 1997, the amount of fuel consumed for this purpose declined 44 percent despite a 33 percent increase in the number of housing units and an increase in house size. The U.S. Department of Energy, however, forecasts that energy used in home heating will rise by 14 percent over the next two decades. That rise is small considering an expected 21 percent increase in the number of houses and the trend toward larger houses. Natural gas and electricity will probably dominate the home heating market for the next two decades. Solar (太阳的) heating never became popular because of cost and limited winter sunlight in most areas; in 2000 only 47,000 homes relied on it.

单选题Courageous people think quickly and act without hesitation .

单选题Looking to help the environment? Consider the following simple ideas. Turn off electrical devices when they"re not being used. Turning off, rather than leaving on stand-by, things like your TV and computer will save huge amounts of energy. With this, we can all help reduce the amount of carbon dioxide emitted into the earth"s atmosphere, thereby reducing pollution and global warming. Share your car. Rather than traveling to work alone, why not arrange ear-sharing with one or more of your friends or colleagues? To give you an example, if you drive a fashionable car, you will use more energy in a year than you would leaving your fridge open for seven years, or your TV on for thirty-two years! Imagine the savings if you shared your ear with 2, 3 or even 4 other people! Refuse junk mail. While we all complain about how much junk mail we get, we very rarely do anything about it. The mail continues to go straight from our letter-boxes into the garbage bin—with 99% of it not even opened. What can you do about this? There are various websites where you can register to receive no junk mail. As well as saving time, you"ll also be doing a lot for the environment. Each year, 100 million trees are used to produce junk mail. 250,000 homes could be heated with one day"s supply of junk mail. There are many other everyday changes you can make to help the environment. They will cost you nothing, and many will actually save you money! Why not give it a try? We can all help, if we really want to.

单选题His eyes widened in surprise after hearing the news.______

单选题His friend unexpectedly dropped in .

单选题We are worried about this fluid situation full with uncertainty.

单选题The passage indicates that ancient treatments for injury and disease were

单选题I can't make it because of a previous engagement.A. primaryB. priorC. temporalD. primitive

单选题There is no doubt that we are living in a period of enormous population growth. In the past, it (51) thousands of years for the world's population to double in size. (52) today there are more people having families and fewer deaths from diseases. As(a) (53) , the population doubles in only 35 years. A(n) (54) supply of food is only one of the human needs that must be (55) . Overcrowding has a highly undesirable effect on life. For example, if every available piece of land were used for producing food, it would be very difficult to (56) proper housing for people, as would health care and recreation. (57) these reasons, more governments are helping families to understand the problems of (58) population. They give 'family planning' advice to families that request it. Such families can plan to have the number of children they want, at times when they are best able to care (59) children and give them a good start in life. (60) rice that have been highly successful in Asia and in (61) African countries. The significance of such work was recognized by the awarding of the 1970 Nobel Peace Prize (62) one of the plant breeders of the 'green revolution'. (63) to grow well, the improved seeds need large (64) of fertilizer and water, which are not always (65) . Many fertilizers are made up of petroleum, and higher prices for oil have resulted in smaller supplies of fertilizers.

单选题A red flag was placed there as a token of danger.

单选题 Food and Cancer Medical experts have suspected for many years that there is a strong link between what a person eats and cancer. They say a new study provides the first evidence that vitamins could reduce a person's chance of developing cancer. A team of Chinese and American scientists did the study. They are from American National Cancer Institute and the Cancer Institute of the Chinese Academy of Medical Sciences in Beijing. The Journal of the National Cancer Institute published the results of the study. About thirty thousand people between the ages of 40 to 69 took part in the study. They were from the northern central Chinese area of Linxian. Most of them took vitamins and minerals every day for five years. Linxian was chosen because the people there have an extremely high rate of cancer of stomach and esophagus. Researchers believe that fungus and molds in local foods may be partly responsible for the high cancer rate. Researchers divided those into eight groups. Seven of the groups received different mixtures of vitamins and minerals daily. The amounts of the vitamins and minerals were 1 to 2 times greater than what American health officials say is needed. The eighth group received sugar pills that had no effect. Those who seemed to gain the most received a mixture of a form of vitamin A called β-carotene, vitamin E and the mineral selenium. The vitamin and mineral are believed to prevent damage to cells caused by cancer-causing substances. Researchers reported a 13 percent drop in cancer rates in those who took β-carotene, vitamin E and selenium. They also found a 10 percent drop in the number of deaths caused by strokes from bursting blood vessels. Scientists warn that it is too soon to know if the effect would be the same among people in other countries. They note that the people in Linxian eat foods that lack necessary vitamins and minerals. Chinese officials will continue to record the health records of the people in Linxian for many years. For now officials reportedly are considering using the .results of the study. They want to find a way to improve the health of people in Linxian and other small towns in China.

单选题Manyscientists have been probing psychologicalproblems.

单选题Students have to obey the rules in the school.A. reply toB. apply forC. abide withD. comply with