单选题Because administering the whole company, he sometimes has to work around the clock.

单选题Diffusion is the spontaneous spreading of matter caused by the random movement of molecules. A. pattern1ess B. whirling C. constant D. rampant

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She has been the subject of massive media coverage.______

单选题It is recommended that diabetics maintain sufficient exercise since otherwise

单选题Children model themselves largely on their parents. They do so mainly through identification. Children identify with a parent when they believe they have the qualities and feelings that are. (51) of that parent. The things parents do and say--and the (52) they do and say to them - strongly influence a child' s (53) . However, parents must consistently behave like the type of (54) they want their child to become. A parent' s actions (55) affect the self image that a child forms through identification. Children who see mainly positive qualities in their (56) will likely learn to see themselves in a positive way. Children who observe chiefly (57) qualities in their parents will have difficulty (58) positive qualities in themselves. Children may (59) their self image, however, as they become increasingly (60) by peers groups standards. Isolated events, dramatic ones, do not necessarily have a permanent (61) on a child's behavior. Children interpret such events according to their established attitudes and previous training. Children who know they are loved can, (62) , accept the divorce of their parents or a parent's early (63) , But if children feel unloved, they may interpret such events as a sign of rejection or punishment. In the same way ,all children are not influenced (64) by toys and games, reading matter, and television programs. As in the case of a dramatic change in family relations, the (65) of an activity or experience depends on how the child interprets it.

单选题{{B}}第二篇{{/B}} {{B}}Forty May Be the New 30 As Scientists Redefine Age{{/B}} Is 40 really the new 30? In many ways people today act younger than their parents did at the same age. Scientists have defined a new age concept and believe it could explain why populations are aging, but at the same time seem to be getting younger. Instead of measuring aging by how long people have lived, the scientists have factored in how many more years people can probably still look forward to. "Using that measure, the average person can get younger in the sense that he or she can have even more years to live as time goes on," said Warren Sanderson of the University of New York in Stony Brook. He and Sergei Scherbov of the Vienna Institute of Demography (人口统计学) at the Austrian (奥地利的) Academy of Sciences, have used their method to estimate how the proportion of elderly people in Germany, Japan and the United States will change in the future. The average German was 39.9 years old in 2000 and could plan to live for another 39.2 years, according to research reported in the journal Nature on Wednesday. However, by 2050 the average German will be 51.9 years old and will be expected to live another 37.1 years. So middle age in 2050 would occur at around 52 years instead of 40 years as in 2000. "As people have more and more years to live they have to save more and plan more and they effectively are behaving as if they were younger," said Sanderson. Five years ago, the average American was 35.3 years old and could plan for 43.5 more years of life. By 2050, the researchers estimate it will increase to 41.7 years and 45.8 future years. "A lot of our skills, our education, our savings and the way we deal with our health care depend a great deal on how many years we have to live," said Sanderson. This dimension of how many years people have to live has been completely ignored in the discussion of aging so far.

单选题You should cultivate the habit of reading carefully. A. invent B. begin C. initiate D. develop

单选题He was given a present in acknowledgement of his work for the business.A. honourB. realizationC. encouragementD. recognition

单选题If I made {{U}}a mistake{{/U}} ,I will try to remedy it.

单选题Egypt Felled by Famine Even ancient Egypt's mighty pyramid builders were powerless in the face of the famine that helped bring down their civilisation around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometres to the south was ultimately to blame — and the same or worse could happen today. The ancient Egyptians depended on the Nile's annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods. Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile. The Blue Nile mud has a different isotope signature from that of the White Nile. So by analysing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river. Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypt's Old Kingdom. The weakened waters would have been catastrophic for the Egyptians. "Changes that affect food supply don't have to be very large to have a ripple effect in societies, " says Bill Ryan of the Lamont Doherty Earth Observatory in New York. Similar events today could be even more devastating, says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D. C. "Anything humans do to shift the climate belts would have an even worse effect along the Nile system today because the populations have increased dramatically. /

单选题Have you seen her lately ?

单选题China does a lot of trade with many countries.

单选题High-speed Rail on Track If an agreement signed in Germany works out,travellers of this Asian city may one day be able to zip from the downtown area to its new airport on a train riding a stream of magnetic energy at speeds up to 500 kilometres per hour. The 40-kilometres-trip-now sometimes a long hour journey when the traffic is heavy-could be cut to less than 10 minutes. Such are the goals of a costly project designed to help to "shorten'the distance between the city centre and the suburban busy airport by making it easier and faster to carry travellers to and back from the airport. The mayor of the city and Germany's Thyssen Krupp AG worked out an agreement in Berlin only several days ago that lays the groundwork for the magnetic levitation train line. They signed a commitment to carry out a feasibility study on the project and outlined the city's intention to import German technology. This project,once completed and acceptable to the two business parties, will be a double-win, the German company can benefit from exporting its technology and equipment and the city receiving German technology can improve its traffic and further strengthen its position as a cosmopolis. Called Maglev for short, the system under discussion makes use of a high-speed train levitated above a guideway and propelled by magnetic fields. The project has been in the talking stage for several months. Hans Ueberschaer, German's ambassador visited the city together with Harmut Heine, representative of Thyssen Krupp. They had an initial discussion with the mayor there about the prospect of the project. The talks were believed to be constructive and paved the way for the future talks in Berlin,where a commitment was reached. Sources familiar with the talks estimated that the project would cost US$723 million, which would cover everything from land use fees and rail construction to train cars. Completion date is 2005. A joint venture company is to be established for the project.

单选题She fell overboard and was drowned.

单选题Benjamin Rush established the first free {{U}}dispensary{{/U}} in the United States.

单选题If you want my advice, you should {{U}}revise{{/U}} your plan for the trip to Beijing. A. change B. exchange C. enlarge D. encourage

单选题Not until his play "Beyond the Horizon" was produced was Eugene O'Neill lauded as the foremost creative American playwright.A. compensatedB. secretly namedC. given preferenceD. praised

单选题 阅读下面这篇短文，短文后列出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；如果该句的信息文章中没有提及，请选择C。 Could you imagine having a cut heal almost overnight(一夜之情)? Scientists at the University of California in San Francisco have isolated(分离) a sub- stance in rabbits that can heal wounds in half the time! The substance, called angiogenesis(血管生成因子) factor, stimulates the growth of blood vessels after injury. Blood vessels are essential to recovery because they carry oxygen and nutrients to cells that both kill germs and repair tissues. All mammals(哺乳动物), from rats to whales to human beings, carry this substance in their bodies. Further research may permit scientists to create artificial angiogenesis factor in the laboratory. Angiogenesis factor, scientists say, would be of value to patients undergoing organ transplants and skin grafts because rapid healing would reduce the time during which infection could strike. The substance could also help "slow healer," such as diabetics, the aged, and the very ill. Cancer researchers are also interested in angiogenesis factor because tumors, like other tissues, depend on blood vessels for growth. Scientists believe that angiogenesis factor may cause this same blood vessel growth in tumors. If antibodies (special body substances that fight disease) against the factor could be found, cancerous tumors could be starved and destroyed.

单选题The train Donald took was