单选题Written records seldom tell social scientists all that they want to know about past cultures.

单选题During the past ten years there have been dramatic changes in the international situation.

单选题The document was compiled by the Department of Health.

单选题{{B}}第三篇{{/B}} {{B}}U.S. to Start $3.2 Billion Child Health Study in January{{/B}} 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 up2 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Structurally,the inside of early Christian churches was simple.

单选题About one million Americans are diagnosed annually with skin cancer A. every year B. severely C. actively D. every month

单选题Mary has {{U}}blended{{/U}} the ingredients. A．made B．mixed O cooked D．eaten

单选题Unfortunately, the rate of his expenditure {{U}}surpasses{{/U}} that of his income.

单选题He was kept in appalling conditions in prison.

单选题I discussed with my intimate friends whether I would immediately have a baby.A. closeB. faithfulC. formerD. kind

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}} Step Back in Time{{/B}} Do you know that we live a lot longer now than the people who were born before us? One hundred years ago the average woman lived to be 45. But now, she can live until at least 80. One of the main reasons for people living longer is that we know how to look after ourselves better. We know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things they need. We know why we sometimes get ill and what to do to get better again. And we know how important it is to do lots of exercise to keep our hearts beating healthily. But in order that we don't slip back into bad habits, let's have a look at what life was like 100 years ago. Families had between 15 and 20 children, although many babies didn't live long. Children suffered from lots of diseases, especially rickets (佝偻病) and scurvy (坏血病), which are both caused by bad diets. This is because many families were very poor and not able to feed their children well. Really poor families who lived in crowded cities like London and Manchester often slept standing up, bending over a piece of string, because there was no room for them to lie down. People didn't have fridges until the 1920s. They kept fresh food cold by storing it on windowsills (窗台板), blocks of ice, or even burying it in the garden. Some children had to start work at the age of seven or eight to earn money for their parents. If you had lived 100 years ago, you might well be selling matchsticks (火柴杆) (a job done by many children) or working with your dad by now.

单选题The governor gave a rather vague outline of his tax plan.A. unclearB. firmC. shortD. neat

单选题The problem facing British surgeons in the early 19th century was that

单选题Mr. Smith gradually acquired a knowledge of the subject.

单选题He was not eligible for the examination because he was over age.

单选题 A Sunshade for the Planet Even with the best will in the world, reducing our carbon emissions is not going to prevent global warming. It has become clear that even if we take the most strong measures to control emissions, the uncertainties in our climate models still leave open the possibility of extreme warming and rises in sea level. At the same time, resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough. Fortunately, if the worst comes to the worst, scientists still have a few tricks up their sleeves. For the most part they have strongly resisted discussing these options for fear of inviting a sense of complacency that might thwart efforts to tackle the root of the problem. Until now, that is. A growing number of researchers are taking a fresh look at large-scale "geoengineering" projects that might be used to counteract global warming. "I use the analogy of methadone," says Stephen Schneider, a climate researcher at Stanford University in California who was among the first to draw attention to global warming. "If you have a heroin addict, the correct treatment is hospitalization, and a long rehab. But if they absolutely refuse, methadone is better than heroin." Basically the idea is to apply "sunscreen" to the whole planet. One astronomer has come up with a radical plan to cool the earth; launch trillions of feather-light discs into space, where they would form a vast cloud that would block the sun's rays. It's controversial, but recent studies suggest there are ways to deflect just enough of the sunlight reaching the earth's surface to counteract the warming produced by the greenhouse effect. Global climate models show that blocking just 1.8% of the incident energy in the sun's rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere. That could be crucial, because even the most severe emissions- control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century, and that would last for at least a century more.

单选题Maybe it's unsurprising that treatment in rural towns costs less than in big cities, with all their high prices, varied populations, and urban woes (IN 难，灾难). But there are also significant disparities in towns that are otherwise very similar. How do you explain the fact, for instance, that in Boulder, Colo., the average cost of Medicare treatment is $9, 103, whereas an hour away in FortCollins, Colo. ,the cost is $ 6,4487 "Disparities" most probably meansA. similarities.B. differences.C. increases.D. costs.

单选题I notified him that my address had changed.

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。 {{B}} Norwich{{/B}} Norwich, the capital of the part of Britain known as East Anglia, has been in existence for more than two thousand years. It began as a small village beside the River Wensum. At the time of the Norman invasion in 1066 it had grown to become one of the largest towns in England. With two cathedrals and a mosque(清真寺), Norwich has long been a popular centre for various religions. The first cathedral was built in 1095 and has recently celebrated its 900th anniversary, while Norwich itself had a year of celebration in 1994 to mark the 800th anniversary of the city receiving a Royal Charter. This allowed it to be called a city and to govern itself independently. Today, in comparison with places like London or Manchester, Norwich is quite small, with a population of around 150,000, but in the 16th century Norwich was the second largest city of England. It continued to grow for the next 300 years and got richer and richer, becoming famous for having as many churches as there are weeks in the year and as many pubs as their are days in the year. Nowadays, there ate far fewer churches and pubs, but in 1964 the University of East Anglia was built in Norwich. With its fast-frowing student population and its success as a modern commercial centre (Norwich is the biggest centre for insurance services outside London), the city now has a side choice of entertainment: theatres, cinemas, nightclubs, busy cafes, excellent restaurants, and a number of arts and leisure centres. There is also a football team, whose colours are green and yellow. The team is known as "The Canaries (金丝雀)",though nobody can be sure why. Now the city's attractions include another important development, a modern shopping centre called "The Castle Mall". The people of Norwich lived with a very large hold in the middle of their city for over two years, as builders dug up the main car park. Lorries moved nearly a million tons of earth so that the roof of the mall could become a city centre park, with attractive water pools and hundreds of trees, but the local people are really pleased that the old open market remains, right in the heart of the city and next to the new development. Both areas continue to do good business, proving that Norwich has managed to mix the best of the old and the new.

单选题China does {{U}}a lot of{{/U}} trade with many countries. A. a great deal of B. a great many of C. a large number of D. a great level of