单选题Human facial expressions differ from those of animals in the degree to which they can be deliberately controlled and modified.

单选题People who eat breakfast are seldom in a bad mood．

单选题Infections 'Speed Memory Loss' Infections outside the brain may speed memory decline in Alzheimer' s disease, UK researchers say. The Southampton University researchers studied 222 elderly people with Alzheimer' s for six months, and they found that getting infections in places like the chest or urinary tract (尿道) could lead to higher level of an inflammatory (引发炎症的) protein called turnout necrosis factor (TNF) in the blood, and double memory loss. There were 110 of the 222 subjects who developed a total of 150 infections, in areas such as the chest, stomach and intestines (肠) and the urinary tract, which led to the production of TNF proteins. These are collectively known as acute systemic inflammation events (SIEs). Subjects with one or more SIEs during the six months follow - up had two times the rate of cognitive decline from their baseline score at the start of the study compared with those who had no SIE. And those patients who had high baseline levels of TNF and then suffered an SIE over the following six months had a 10 fold increase in the rate of cognitive decline compared to those who were SIE free. Dr Susanne Sorensen, Head of Research, Alzheimer' s Society said: We know there might be a link between inflammatory processes and Alzheimer' s but this is not yet fully understood. "In the meantime it' s important that older people, people with dementia treat any infection seriously and seek medical help in time. "Professor Clive Holmes at the University of Southampton, who led the research, said they had looked at patients with mild, moderate and severe Alzheimer's disease. "The worse the infection the worse the affect on the memory, but this is only an association at the moment. " One might guess that people with a more rapid rate of cognitive decline are more susceptible to infections or injury, but we found no evidence to suggest that people with more severedementia (痴呆) were more likely to have infections or injuries. "If further work proves that TNF is causing more brain inflammation it may be possible to use drugs that block TNF to help dementia sufferers. " Professor Holmes said although common illnesses like colds and slight wounds could also set up an inflammatory response in the body, the data from his study did not support the idea that even these could cause memory loss.

单选题The ice is not thick enough to {{U}}bear{{/U}} the weight of a tank．

单选题All the following complaints are said to have increased among children aged 12 to 16 EXCEPT

单选题When he spoke, she had an unpleasant {{U}}insight{{/U}} into what life would be like as his wife.

单选题Treatment Guidelines on Hoarseness If using your voice is difficult, then you know what dysphonia is. The more common name for this disorder is hoarseness. Experts say about one in three people will become hoarse at some point in their lives. Infections, smoking and using your voice too much, too loudly or just incorrectly can all cause hoarseness. It happens more commonly in women, children, the elderly and those who use their voice a lot in their jobs. Experts say hoarseness costs several billion dollars a year in lost productivity from people missing work. Now, doctors have the first treatment guidelines from the American Academy of Otolaryngology -Head and Neck Surgery Foundation. The new guidelines recognize that most eases are not serious and go away within a few days. But hoarseness can also be a sign of something worse. Doctor Richard Rosenfeld helped develop the guidelines. He calls for attention to the fact that hoarseness is not just a symptom. It occurs as a result of something underlying which can be potentially serious. "If you have hoarseness with tobacco or alcohol use, that would be a significant risk factor for cancer or other problems of the throat that could be serious. If you have any sort of a mass or growth in your neck at the same time, that would be very suspicious. The same is true if hoarseness begins after an accident, or injury. Or if you are also losing weight for no reason. Or if you are trying to rest your voice but it keeps getting worse. "he says. If hoarseness continues or the cause is unknown, doctors should perform an examination called a laryngoscopy. This is done in the doctor's office to look down the throat at the voice box and vocal chords. The guidelines urge doctors not to use other imaging methods like CT or MRI scans until they have done this. The guidelines also suggest ways to avoid getting hoarse. Drink lots of water. Avoid tobacco smoke and other irritants. And for people who use their voices a lot, like singers or professional speakers, get voice training and use an amplifier.

单选题I am not certain whether he will come. A. sure B. determined C. sorry D. glad

单选题American Marriage and Family More surprising, perhaps, than the current difficulties of traditional marriage is the fact that marriage itself is alive and thriving. As Skolnick notes, Americans are a marrying people: relative to Europeans, more of us marry and we marry at a younger age. Moreover, after a decline in the early 1970s, the rate of marriage in the United States is now increasing. Even the divorce rate need to be taken in this pro marriage context: some 80 percent of divorced individuals remarry. Thus marriage remains, by far, the preferred way of life for the vast majority of people in our society. What has changed more than marriage is the nuclear family. Twenty-five years ago, the typical American family consisted of a husband, a wife, and two or three children. Now, there are many marriages in which couples have decided not to have any children. And there are many marriages where at least some of the children are from the wife's previous marriages, of the husband's, or both. Sometimes these children spend all of their time with one parent from the former marriage; sometimes they are shared between the two former spouses(配偶). Thus, one can find every type of family arrangement. There are marriages without children; marriages with children from only the present marriage; marriages with "full-time" children from both the present and former marriages; marriages with "full-time" children from the present marriage and "part-time" children from former marriages. There are stepfathers, stepmothers, half-brothers, and half-sisters. It is not all that unusual for a child to have four parents and grandparents! These are enormous changes from the traditional nuclear family. But even so, even in the midst of all this, there remains one constant: most Americans spend most of their adult life married.

单选题I （grabbed） his arm and made him turn to look at me.

单选题He confesses that he has done it.

单选题In the 1950's accumulating scientific evidence linking cigarette smoking and lung cancer made a (51) impact (52) the smoking public. During this period many health agencies declared smoking to be a (53) Hazard. US Surgeon General Leroy E. Brunei said in 1957: "The weigh of the evidence is increasingly pointing to one direction: that (54) smoking is one of the causative factors in lung cancer." The initial reports had the heaviest impact, so (55) total cigarette production dropped in 1953 and again in 1954. (56) reports appeared to have less (57) on smoking habits, and by 1957 cigarette production had (58) above the 1952 level. (59) four voluntary health organizations urgued president John F. Kennedy to (60) a commission to study the widespread implications of the tobacco problem, the Surgeon General's Advisory Committee on Smoking and Health was (61) in 1962 to review and evaluate all (62) scientific data. When its report, Smoking and Health, was released in early 1964, cigarette consumption again declined (63) . Pipe and cigar smoking increased. More than 350, 000 copies of the report were contributed and sold. (64) abstracts and pamphlets were prepared by the Public Health Service and other organizations (65) a massive educational campaign on the hazards of cigarette smoking.

单选题The leaves have been swept into huge Uheaps. /U

单选题After Susan Joyce was laid off from Digital Equipment Corp. she was horrified to hear of two suicides in her layoff group. Then she learned about a colleague who stabbed his wife to death and hung himself. "I worked with him for 10 years, maybe more, "says Joyce. "He seemed like a nice guy. " When being laid off, Susan Joyce had worked.A. for at least 10 years.B. for at most 10 years.C. on more than 10 jobs.D. for only one company.

单选题The leaves have been swept into huge {{U}}heaps{{/U}}.

单选题The Olympic Games attempt to transcend national interests and bring together the best international athletes in a spirit of friendly competition and peace.

单选题We should Ucontemplated /Uthe problem from all sides.

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I caught sight of her in the crowd.A. sawB. glancedC. staredD. skimmed

单选题 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}} Breastfeeding Can Cut Cardiovascular Risk{{/B}} Breastfeeding can reduce the risk of a heart attack or stroke later in life and could prevent hundreds of{{U}} (1) {{/U}}of deaths each year, researchers said on Friday. Babies who ale breastfed have fewer childhood infections and allergies and are less{{U}} (2) {{/U}}to obesity. British scientists have now shown that breastfeeding and slow growth in the first weeks and months of life has a protective effect{{U}} (3) {{/U}}cardiovascular disease. "Diets that promote more rapid growth put babies at risk many years later in{{U}} (4) {{/U}}of raising their blood pressure, raising their cholesterol and increasing their tendency to diabetes and obesity--the{{U}} (5) {{/U}}main risk factors for stroke and heart attack." said Professor Alan Lucas of the Institute of Child Health in London. "Our evidence suggests that the reason why breast, fed babies do better is because they grow more{{U}} (6) {{/U}}in the early weeks." Lucas said the effects of breastfeeding on blood pressure and cholesterol later in life are greater than{{U}} (7) {{/U}}adults can do to control the risk factors for, cardiovascular disease. Other than taking drugs. An estimated 17 million people die of{{U}} (8) {{/U}}disease, particularly heart attack and strokes, each year, according to the World Health Organization. Lucas and his colleagues compared the health of 216 teenagers{{U}} (9) {{/U}}as babies had either been breastfed or given different nutritional baby formulas. They reported their{{U}} (10) {{/U}}in The Lancet medical journal. The teenagers who had been{{U}} (11) {{/U}}had a 14 percent lower ratio of bad to good cholesterol and lower concentrations of a protein that is a marker for cardiovascular disease risk. The researchers also found that,{{U}} (12) {{/U}}of the child's weight at birth the faster the infants grew in the early weeks and months of life. The{{U}} (13) {{/U}}was their later risk of heart disease and stroke. The effect was the{{U}} (14) {{/U}}for both boys and girls. "The more human milk you have in the newborn period the lower your cholesterol level is, the lower your blood pressure is 16 years{{U}} (15) {{/U}}," Lucas said. breastfeeding n. 母乳喂养 cardiovascular adj. (病等) 心血管的 allergy n. 过敏性 cholesterol n. 胆固醇 diabetes n. 糖尿病 obesity n. 肥胖 marker n. 标识,标志,