单选题I must try to make ______ as I can of this project which I have undertaken.

单选题The face of the 21sl century is already growing in a laboratory. Getting a piece of the new look could soon be as simple as writing a cheque. Scientists in recent years have made giant leaps in the artificial production of skin, bones and tissue. While their research has been motivated by a desire to help accident and medical victims, their work is about to go commercial. The burgeoning (萌芽) cosmetic surgery market has snapped up the technological advances. By the turn of the 21st century, changing your face or improving your body will be limited not by your imagination or desire, but by the size of your bank account. And there is even work being done on that, with the costs of cosmetic surgery being cut to make it affordable and accessible for the average woman and her partner. "It's no longer a vanity thing, it's simply making use of the available technology to improve those parts of the body you might not be happy with, " Cindy Clovetti, a Toronto-based skin and beauty care expert, said. "People who 10 years ago said they would never use a computer and would never get a boob job (胸部整形手术) are now surfing the web getting, the latest information for their next operation. " Latest figures in the United States indicate the number of patients receiving cosmetic surgery in 12 months will top the magic million within two years (there were 850000 last year), while the number of men seeking image-improving operations has increased 35 percent in the past four years. Breast implants are now very much a bread-and-butter job for many cosmetic surgeons and the big advances have been made in the development of bone implants which can produce instant high cheek bones, sculpture better shaped noses and ears and give men the chisel-shaped jaw that is always a sure-fire (必定成功的) chick-magnet (吸引女人的东西). British futurologist Ian Pearson speculates that by 2020, up to 96 percent of body weight will be replaceable with the brain being the only organ not interchangeable. "By 2020 you could have a new face, or new skin, and by 2030 a fully working replacement body part. By the end of the 21st century, people will be able to get an entirely new body. /

单选题Scientists have found a way to use hair to figure out where a person is from and where that person has been. The finding could help solve crimes, among other useful applications. Water is central to the new technique. Our bodies break water down into its parts: hydrogen and oxygen. Atoms of these two elements end up in our tissues and hair. But not all water is the same. Hydrogen and oxygen atoms can vary in how much they weigh. Different forms of a single element are called isotopes. And depending on where you live, tap water contains unique proportions of the heavier and lighter isotopes of hydrogen and oxygen. Might hair record these watery quirks? That"s what James R. Ehleringer, an environmental scientist at the University of Utah in Salt Lake City, wondered. To find out, he and his colleagues collected hair from barbers and hair stylists in 65 cities in 18 states across the United States. The researchers assumed that the hair they collected came from people who lived in the area. Even though people drink a lot of bottled water these days, the scientists found that hair overwhelmingly reflected the concentrations of hydrogen and oxygen isotopes in local tap water. That"s probably because people usually cook their food in the local water. What"s more, most of the other liquids people drink including milk and soft drinks contain large amounts of water that also come from sources within their region. Scientists already knew how the composition of water varies throughout the country. Ehleringer and colleagues combined that information with their results to predict the composition of hair in people from different regions. One hair sample used in Ehleringer"s study came from a man who had recently moved from Beijing, China, to Salt Lake City. As his hair grew, it reflected his change in location. The new technique can"t point to exactly where a person is from, because similar types of water appear in different regions that span a broad area. But authorities can now use the information to analyze hair samples from criminals or crime victims and narrow their search for clues.

单选题Speaker A: The lights are about off, but I'd like to buy some ice-cream before the play starts. Speaker B: ______ A. Which ice-cream would you like, vanilla or chocolate? B. Yes, the lights will be off in five minutes. C. Shall we take our seats now? We can always get some later. D. May I have the honor to buy it for you?

单选题This crime fiction was ______ very popular but nobody reads it today. A. once B. ever C. never D. always

单选题People innately ______ for superiority over their peers although it sometimes takes the form of an exaggerated lust for power. A. strive B. ascertain C. justify D. adhere

单选题Images of eyes could be put up in the following places EXCEPT ______.

单选题The biologist admitted ______ excessive numbers of animals in laboratory tests.

单选题Which of the following countries has enjoyed the fastest economic growth in history?

单选题While the total number of farmers engaged in agricultural production is barely half ______ it used to be in 1959, the size of the average farm has tripled.

单选题We should be able to do the job for you quickly, ______ you give us all the necessary information. A. in case B. provided that C. or else D. as if

单选题{{B}}Passage Four{{/B}} Most of the plans and programs for diminishing crime by means of comprehensive community organization have made prevention their major purpose. However, the underlying concepts on which such programs are based suffer from inconsistency (不一致，矛盾) and confusion. It would be inaccurate to speak as if concise, clear, and explicit models for crime prevention existed especially since writing and discussion on the subject often have been more ideological than scientific. One conception heavily weighted with ideology is the argument that crime can be prevented by massive or total programs of social and economic improvement directed at the root causes of crime in society as a whole. The assumption is that eliminating harmful social conditions such as poverty, malnutrition, disease, poor housing, family disorganization, unemployment, and racial discrimination will make crime disappear. Crime is traced to a pathological (病态的) or broken social structure, and only a thorough renovation or replacement of that structure will usher in a crimeless society. This conception has revolutionary implications going back to older socialist beliefs that poverty or class exploitation causes crime. Among the methods it advocates to solve social problems is the activation of some forms of popular democracy. Another form of social improvement more sophisticated in conception has been loosely designated as "opportunity theory ". This conception holds that crime results from psychic pressures in individuals who are culturally indoctrinated (灌输) with achievement values and yet have, no opportunity for upward mobility because of their unfortunate position in a rigid social structure. Those so disadvantaged are primarily youths in the lower socio-economic strata. Amelioration (改善) inspired by opportunity theory employs vaguely martial imagery: it speaks of the "mobilization" of community resources to make "war" on poverty. Broad-scale programs of social and cultural improvement may be desirable or necessary at times, but since they fail to explain why some poverty-stricken youths turn to crime while others do not, their efficacy (功效) in eradicating and preventing crime is questionable at best. So far only one country, the Soviet Union, has conducted a large-scale revolutionary experiment in social improvement, and the results have not been affirmative: Soviet authorities are still plagued by juvenile crime. This experiment suggests that social improvement is too scattered in its impact to be an effective means of crime prevention.

单选题Speaker A: ______.Speaker B: I'm running a temperature, and feel sick. A. What can I do for you? B. What seems to be the trouble? C. What are you doing these days? D. How long has this been going on?

单选题Speaker A: Well, I have to get back to the office now. It's been really nice talking to you.Speaker B: ______See you.

单选题In this passage, the author mainly tells us ______.

单选题The telegraph opened up the possibility of establishing almost ______ communication and thereby offered many practical advantages to people in all walks of life. A. distant B. instantaneous C. immediate D. prompt

单选题Speaker A: Where is Mike this morning? Have you seen him? Speaker B: No. I think he"s got a cold. Yesterday, he was not feeling well. Speaker A: ______

单选题In Australia the Asians have made their influence ______ in businesses, large and small.

单选题As he delayed his departure on account of something important, by the time he arrives in Beijing, we ______ here for two days.

单选题 More boys than girls are born all over the world, but a new study has found that the closer people live to the equator (赤道), the smaller the difference becomes. No one knows why. The imbalanced sex ratio at birth has been known for more than a hundred years, and researchers have found a large variety of social, economic and biological factors that relate to the sex ratio at birth—war, economic stress, age, diet, selective abortion and more. But latitude (纬度) is a natural phenomenon, unaffected by cultural or economic factors. To look at the effect of latitude, Kristen J. Navara of the University of Georgia used the latitude of the capital city in 202 countries, as well as 10 years of data on sex ratio at birth and annual variations in day length and temperature. Dr. Navara performed a statistical analysis which showed that there was a significant relation between sex ratios in favor of boys and latitude. African countries produced the lowest sex ratios—50.7 percent boys—and European and Asian countries had the highest with 51.4 percent. There are some possible explanations, but none entirely satisfactory. It could be that there is some survival value in producing more girls in warmer regions, but it is unclear what this might be. There may be genetic or racial differences that could explain it, but the connection persists over so many varied populations that this seems unlikely. Mice also produce more male offspring during shorter days or colder weather, but the reasons in these animals are just as mysterious as they are in humans. "There's a possibility that humans might be responding to factors they were programmed to respond to a long time ago—not cultural or socioeconomic, but climate and things like latitude," Dr. Navara said. "What's interesting is that we may be seeing something that connects us with our animal ancestry."