单选题John is collaborating with Mary in writing an article.

单选题The towers of a suspension bridge serve as a rigid framework to which the cables are attached.

单选题You will get to the school more quickly if you take this track across the fields.A. pathB. passageC. roadD. motorway

单选题Have you talked to her lately ?

单选题There was a profound silence after his remark. A. proud B. short C. sudden D. deep

单选题Many IQ tests show that there are no significant differences in the mean, or average scores of IQ tests between men and women. When a new IQ test, is being constructed, it is quite easy to find test (51) that are not answered correctly (52) the same proportions of men and women, (53) these are usually then eliminated from the test. So, to some (54) the fact that no differences are to be found in our current IQ tests between the (55) for the two sexes is hardly surprising. There are, (56) , differences in the standard deviations(偏差)or variability of the (57) of the two sexes in many IQ tests, (58) men showing the greater variation. The (59) of many IQ test scores are such (60) they approximate to the normal curve(正规曲线). If we regard some arbitrary lower score on a test as a classification like "educational subnormal(智力上逊常的人)" (ESN) and some equally arbitrary (61) score as "gifted", we then find that there is higher ratio of ESN males to women and likewise we (62) that there are more gifted men than women, even though the average scores are the same. The (63) of men and women are known to differ somewhat in size, with women having about 200g less tissue (64) the other hand, they also tend to (65) less body mass, and over the phylogenetic(系统发育的)scale, the best index of species intelligence is the ratio of body mass to brain size.

单选题Attitudes to AIDS Now Most people say that the USA is making progress in fighting AIDS, but they don"t know there"s no cure and strongly disagree that "the AIDS epidemic is over," a new survey finds. The findings, released on Thursday by the Kaiser Family Foundation, reassure activists who have worried that public concern about AIDS might disappear in light of recent news about advances in treatment and declines in deaths. "While people are very optimistic about the advances, they"re still realistic about the fact that there is no cure," says Sophia Chang, director of HIV programs at the foundation. The Kaiser survey, like a recent USA TODAY-Gallup Poll, does find that the number of people ranking AIDS as the country"s top health problem has fallen. In the Kaiser Poll, 38% say it"s the top concern, down from 44% in a 1996 poll; in the Gallup Poll, 29% say AIDS is No.1, down from 41% in 1992 and 67% in 1987. Other findings from Kaiser, which polled more than 1,200 adults in September and October and asked additional questions of another 1,000 adults in November: 52% say the country is making progress against AIDS, up from 32% in 1995. 51% say the government spends too little on AIDS. 86% correctly say AIDS drugs can now lengthen lives; an equal number correctly say that the drugs are not cures. 67% incorrectly say that AIDS deaths increased or stayed the same in the past year; 24% know deaths fell. Daniel Zing-ale, director of AIDS Action Council, says, "I"m encouraged that the American people are getting the message that the AIDS epidemic isn"t over. I hope the decision-makers in Washington are getting the same message...We have seen signs of complacency."

单选题She stood there, trembling with fear.

单选题Tom dropped off in front of fire. A. drop at B. drop away C. doze off D. take off

单选题I propose that we discussed this at the next meeting.

单选题Early or Later Day Care The British psychoanalyst John Bowlby maintains that separation from the parents during the sensitive "attachment" period from birth to three may scar a child's personality and predispose to emotional problems in later life. Some people have drawn the conclusion from Bowlby's work that children should not be subjected to day care before the age of three because of the parental separation it entails, and many people do believe this. But there are also arguments against such a strong conclusion. Firstly, anthropologists point out that the insulated love affair between children and parents found in modern societies does not usually exist in traditional societies. For example, in some tribal societies, such as the Ngoni, the father and mother of a child did not rear their infant alone — far from it. Secondly, common sense tells us that day care would not be so widespread today if parents, care-takers found children had problems with it. Statistical studies of this kind have not yet been carried out, and even if they were, the results would be certain to be complicated and controversial. Thirdly, in the last decade there have been a number of careful American studies of children in day care, and they have uniformly reported that day care had a neutral or slightly positive effect on children's development. But tests that have had to be used to measure this development are not widely enough accepted to settle the issue. But Bowlby's analysis raises the possibility that early day care has delayed effects. The possibility that such care might lead to, say, more mental illness or crime 15 or 20 years later can only be explored by the use of statistics. Whatever the long-term effects, parents sometimes find the immediate effects difficult to deal with. Children under three are likely to protest at leaving their parents and show unhappiness. At the age of three or three and a half almost all children find the transition to nursery easy, and this is undoubtedly why more and more parents make use of child care at this time. The matter, then, is far from clear-cut, though experience and available evidence indicate that early care is reasonable for infants.

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。 The Cold Places The Arctic is a polar region. It surrounds the North Pole. Like Antarctica, the Arctic is a land of ice and snow. Antarctica holds the record for a low temperature reading--125 degrees Fahrenheit below zero. Reading of 85 degrees below zero is common in both the Arctic and Antarctica. Winter temperatures average 30 degrees below zero in the Arctic. At the South Pole the winter average is about 73 degrees below zero. One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arc tic. This one thing is the low temperature--the killing chill of far North and the polar South. To survive, men must wear the warmest possible clothing. They must build windproof shelters.They must keep heaters going at all times. Not even for a moment can they be unprotected against the below-zero temperatures. Men have a way of providing for themselves. Polar explorers wrap themselves in warm coats and furs. The cold makes life difficult. But the explorers can stay alive. What about animals? Can they survive? Do we find plants? Do we find life in the Arctic and in Antarctica? Yes, we do. There is life in the oceans. There is life on land. Antarctica, as we have seen, is a cold place indeed. But this has not always been the case. Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own. Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests. Heat and moisture must have kept the trees in the forests alive.

单选题The Writing"s on the Wall Is it art or is it just vandalism (野蛮行为)? Well, it"s still a crime, but graffiti (涂鸦) has changed since the days of spraying your name on a wall to mark your territory. Street art has become much more sophisticated since a 17-year-old called Demetrius started spraying his "tag", TAKI 183, all over the New York underground in 1971, and hip-hop culture was born. Hip-hop is a mixture of art, music and dancing, poetry, language and fashion. It came from young inner-city. People who fell left out by their richer classmates and who were desperate to express themselves in any way they could. An experiment to control the spread of graffiti in Rochdale, Creator Manchester, has been so successful that plans have been made by local street artists for an international convention in June. "We"re planning to get people together from different countries like France and Germany for a week," says Liam, one of the organizers. The scheme started in 2000, and has attracted people of all age groups and both sexes. We all share a common interest and get on really well with each other. The first site to be chosen was a subway. Before we began, people were afraid to use the subway. We had it cleaned up and now, with all the artists hanging out down there, people are using it again. People can relate to graffiti much more now. By providing places to display their talents legally, there has been a fall in the amount of "tagging" on people"s private property. Street artists Temper developed his drawing skills at a young age. In art classes at school he was really frustrated because the Art teacher didn"t spend time with him. They thought he was already very good at art and so spend more time with other students. So, at 12 years old, Temper started painting with all these guys he"d hooked up with who were about 22 years old. He looked up to them and loved what they were doing on the streets of Wolvehampicn, England. "The whole hip-hop scene was built up of different things and I did a bit of everything. But it was always the graffiti I was best at." he says.

单选题Have you talked to her lately ?

单选题Science and Scientist The word science is heard so often in modern times that almost everybody has some notion of its meaning. On the other hand, its definition is difficult for many people. The meaning of the term is confusing, but everyone should understand its meaning and objectives. Just to make the explanation as simple as possible, suppose science is defined as classified knowledge (facts). Even in the true sciences distinguishing fact from fiction is not always easy. For this reason great care should be taken to distinguish between beliefs and truths. There is no danger as long as a clear difference is made between temporary and proved explanations. For example, hypotheses (假设) and theories are attempts to explain natural phenomena. From these positions the scientist continues to experiment and observe until they are proved or discredited (使不相信). The exact status of any explanation should be clearly labeled to avoid confusion. The objectives of science are primarily the discovery and the subsequent understanding of the unknown. Man cannot be satisfied with recognizing that secrets exist in nature or that questions are unanswerable; he must solve them. Toward that end specialists in the field of biology and related fields of interest are directing much of their time and energy. Actually, two basic approaches lead to the discovery of new information. One, aimed at satisfying curiosity, is referred to as pure science. The other is aimed at using knowledge for specific purposes-for instance, improving health, raising standards of living, or creating new consumer products. In this case knowledge is put to economic use. Such an approach is referred to as applied science. Sometimes practical-minded people miss the point of pure science in thinking only of its immediate application for economic rewards. Chemists responsible for many of the discoveries could hardly have anticipated that their findings would one day result in applications of such a practical nature as those directly related to life and death. The discovery of one bit information opens the door to the discovery of another. Some discoveries seem so simple that one is amazed they were not made years ago; however, one should remember that the construction of the microscope had to precede the discovery of the cell. The host of scientists dedicating their lives to pure science are not apologetic (抱歉) about ignoring the practical side of their discoveries; they know from experience that most knowledge is eventually applied.

单选题I can no longer tolerate his actions.

单选题 下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请仔细阅读短文并根据短文内容回答其后面的问题，从4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} {{B}} Medical Journals{{/B}} Medical journals are publications that report medical information to physicians and other health professionals. In the past, these journals were available only in print. With the development of electronic publishing, many medical journals now have Web sites on the Internet, and some journals publish only online. A few medical journals, like the Journal of the American Medical Association, are considered general medical journals because they cover many fields of medicine. Most medical journals are specialty journals that focus on a particular area of medicine. Medical journals publish many types of articles. Research articles report the results of research studies on a range of topics varying from the basic mechanisms of diseases to clinical trials that compare outcomes of different treatments. Review articles summarize and analyze the information available on a specific topic based on a careful search of the medical literature. Because the results of individual research studies can be affected by many factors, combining results from different studies on the same topic can be helpful in reaching conclusions about the scientific evidence for preventing, diagnosing or treating a particular disease. Case conferences and case reports may be published in medical journals to educate physicians about particular illnesses and how to treat at them. Editorials in medical journals are short essays that express the views of the authors, often regarding a research or review article published in the same issue. Editorials provide perspective on how the current article fits with other information on the same topic. Letters to the editor provide a way for readers of the medical journal to express comments, questions or criticisms about articles published in that journal.

单选题All the people {{U}}assembled{{/U}} at Mary's house. A. collected B. fixed C. asserted D. assist

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

单选题She can speak French and German, let alone English.