单选题Look After Your Voice Often speakers at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva in you mouth. First gently bite the edges of your tongue with your teeth. Or, press your entire tongue to the bottom of your mouth and hold it there until the saliva flow. Or you can imagine that you are slicing a big juicy lemon and sucking the juice. Before you begin your talk, be kind to your voice. Avoid milk or creamy drinks which coat your throat. Keen your throat wet by drinking a little sweetened warm tea or diluted fruit juice. If you sense that you are losing your voice, stop talking completely. Save your voice for your speech. You may feel foolish using paper to write notes, but the best thing you can do is to rest your voice. If you need to see a doctor, perhaps you can get some advice from a professional singer. In the meantime, do not even talk in a low voice. What about drinking alcohol to wet your throat? I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence. The second drink gives you even more confidence. Finally you will feel all-powerful and you will feel you can do everything, but in fact your brain and your mouth do not work together properly. Save the alcohol until you finish speaking. Perhaps you want to accept the advice, but you may wonder if you can ever change the habits of a lifetime. Of course you can. Goethe, who lived before indoor skating rinks or swimming pools, said, "We learn to skate in the summer and swim in the winter." Take this message to heart and give yourself time to develop your new habits. If you are willing to change, you will soon be able to say that you will never forget these techniques because they became a part of your body.

单选题She was unwilling to go but she had no choice．

单选题The river widens considerably as it begins to turn east. A. extends B. stretches C. broadens D. traverses

单选题Which of the following words is closest in meaning to "awkward" in paragraph 4?

单选题Following the success of chewing gum, schools handed out gum to school children.

单选题Mother Nature Shows Her Strength Tornadoes(龙卷风)and heavy thunderstorms moved across the Great Lakes and into Trumbull County on Saturday evening: The storms were dramatic and dangerous. George Snyder was driving the fire truck down Route 88 when he first noticed that a funnel (漏斗状的)cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while. It was moving toward Bradley Road and then suddenly it disappeared," Snyder said. Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday. In Trumbull County, a tornado turned trees onto their sides. Some trees feel onto houses and cars. Other trees fell into telephone and electrical wires as they went down. Amanda Symcheck was having a party when the storm began. "I knew something was wrong," she said. "I saw the sky go green and pink(粉红色). Then it sounded like a train rushing toward the house. I started crying and told everyone to go to the basement for protection. " The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms. The heavy rains and high wind caused the power to go out in many homes. The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County. The river was so hight that the water ran into streets and houses. Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks, police cars, and other rescue vehicles to help people who were in trouble. Many people who live near the river had to leave their homes for their own safety. Some people reported five feet of water in their homes. Local and state officials opened emergency shelters for the people who were evacuated(撤走). The Red Cross served meals to them. "This was a really intense storm," said Snyder. "People were afraid. Mother Nature call be fierce. We were lucky this time. No one was killed. "

单选题I was most surprised to hear Susan's marriage.A. veryB. reallyC. moreD. least

单选题What {{U}}influenced{{/U}} you to do it?

单选题 下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。 {{B}}Passive Smoking Is Workplace Killer{{/B}} Pressure mounted on Britain on Monday to take action on{{U}} (51) {{/U}}smoking with new research showing second - hand smoke{{U}} (52) {{/U}}about one worker each week in the hospitality industry (服务行业). Professor Knorad Jamrozik, of Imperial (帝国的) College in London, told a conference on environmental tobacco that second – hand{{U}} (53) {{/U}}kills 49 employees in pubs, bars, restaurants and hotels each year and contributes to 700 deaths from lung cancer, heart{{U}} (54) {{/U}}and stroke across the total national work force. "Exposure in the hospitality{{U}} (55) {{/U}}at work outweighs (超过) the consequences of exposure of living{{U}} (56) {{/U}}a smoker for those staff," Jamrozik said in an interview. Other{{U}} (57) {{/U}}have measured the levels of exposure to passive smoking but Jamrozik calculated how it would translate into avoidable deaths. His findings are{{U}} (58) {{/U}}on the number of people working in the hospitality industry in Britain, their exposure to second - hand smoke and their{{U}} (59) {{/U}}of dying from it. Jamrozik said the findings would apply to{{U}} (60) {{/U}}countries in Europe because, to a greater or{{U}} (61) {{/U}}extent, levels of smoking in the community are similar. Professor Carol Black, president of the Royal College of Physicians, which sponsored the meeting, said the research is proof of the need for a ban on smoking in{{U}} (62) {{/U}}places. "Environmental tobacco smoke in pubs, bars, restaurants and other public places is{{U}} (63) {{/U}}damaging to the health of employees as well as the general public," she said in a statement. "Making these places smoke - free not only protects vulnerable (易受伤害的) staff and the public, it will{{U}} (64) {{/U}}help over 300,000 people in Britain to stop smoking completely," she added. Ireland recently became the first country to introduce a national ban on smoking in public{{U}} (65) {{/U}}. New York and parts of Australia have taken similar measures.

单选题It is (out of the question) that the inspector will come tomorrow.

单选题Diabetes (糖尿病) and Eye Damage Over 2 million Canadians have diabetes. It is the leading cause of blindness in North Americans under 65 years of age. Diabetes is a condition where the body either cannot produce enough insulin (胰岛素) or cannot respond properly to insulin. Insulin is important because it moves glucose (葡萄糖), a simple sugar, to the body"s cells from the blood. The food people eat provides the body with glucose, which is used by the cells as a source of energy. If insulin isn"t available or doesn"t work correctly to move glucose from the blood into the cells, glucose will stay in the blood, leading to high blood sugar levels. High blood sugar levels damage the blood vessels, including the tiny blood vessels in the eye. This leads to an eye disease known as diabetic retinopathy (糖尿病型视网膜病). The retina (视网膜) is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy, some blood vessels in the retina are lost, and some of the other blood vessels begin to "leak" blood. This causes the retina to swell, and gradually cuts off its supply of oxygen and nutrients (滋养物). Eventually, the retina starts to grow new blood vessels to replace the damaged ones. Unfortunately, these new vessels are not as strong as the old ones. They are more likely to break, causing bleeding in the eye. At first, people with diabetic retinopathy will not notice any symptoms. As the disease gets worse, they may notice blurred (模糊的) vision, black spots or flashing lights. As time goes on, it can progress to blindness. Everyone with diabetes is at risk for diabetic retinopathy, and the risk increases the longer you"ve had diabetes. Fortunately, you can reduce your risk. If you do not have diabetes, but think you may be at risk for this condition, visit your doctor to be screened for diabetes. If you do have diabetes: ·Have frequent eye check-ups. ·Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage. ·If you have high blood pressure, follow your recommended diet and medications to keep it under control. If you are not sure whether you have high blood pressure, or whether your blood pressure is under control, discuss this with your doctor.

单选题The methods of communication used during the war were （primitive）.

单选题Unlike the common cold, flu tends to start abruptly.A. mysteriouslyB. seasonallyC. repeatedlyD. suddenly

单选题Below 600 feet ocean waters range from dimly lit to completely dark.

单选题High Percentage of Accidents Placing a human being behind the wheel of an automobile often has the same curios effect as cutting certain fibres in the brain. The result in either case is more primitive behaviour. Hostile feelings are apt to be expressed in an aggressive way. The same man who will step aside for a stranger at a doorway will, when behind the wheel, risk an accident trying to beat another motorist through an intersection. The importance of emotional factors in automobile accidents is gaining recognition. Doctors and other scientists have concluded that the highway death toll resembles a disease epidemic and should be investigated as such. Dr Ross A. McFarland, Associate Professor of industrial Hygiene at the Harvard University School of Public Health, aid that accidents "now constitute a greater threat to the safety of large segments of the population than diseases do. " Accidents are the leading cause of death between the ages of 1 and 35. About one third of all accidental deaths and one seventh of all accidental injuries are caused by motor vehicles. Based on the present rate of vehicle registration, unless the accident rate is cut in half, one of every 10 persons in the country will be killed or injured in a traffic accident in the next 15 years. Research to find the underlying causes of accidents and to develop ways to detect drivers who are apt to cause them is being conducted at universities and medical centres. Here are some of their findings so far: A man drives as he lives. If he is often in trouble with collection agencies, the courts, and police, he will have repeated automobile accidents. Accident repeaters usually are egocentric, exhibitionistic, resentful of authority, impulsive, and lacking in social responsibility. As group, they can be classified as borderline psychopathic personalities, according to Dr. McFarland. The suspicion, however, that accident repeaters could be detected in advance by screening out persons with more hostile impulses is false. A study at the University of Colorado showed that there were just as many overly hostile persons among those who had no accidents as among those with repeated accidents. Psychologists currently are studying Denver high school pupils to test the validity of this concept. They are making psychological evaluations of the pupils to see whether subsequent driving records will bear out their thesis.

单选题She could not answer, it was an immense load off her heart.

单选题Who Wants to Live Forever? If your doctor could give you a drug that would let you live a healthy life for twice as long, would you take it? The good news is that we may be drawing near to that date. Scientists have already extended the lives of flies, worms and mice in laboratories. Many now think that using genetic treatments we will soon be able to extend human life to at least 140 years. This seems a great idea. Think of how much more time we could spend chasing our dreams, spending time with our loved ones, watching our families grow and have families of their own. "Longer life would give us a chance to recover from our mistakes and promote long term thinking, " says Dr Gregory Stock of the University of California School of Public Health. "It would also raise productivity by adding to the year we can work. " Longer lives don't just affect the people who live them. They also affect society as a wbole. "We have war, poverty, all sorts of issues around, and I don't think any of them would be at all helped by having people live longer, " says US bioethicist Daniel Callahan. "The question is 'What will we get as a society? ' I suspect it won't be a better society. " It would certainly be a very different society. People are already finding it more difficult to stay married. Divorce rates are rising. What would happen to marriage in a society where people lived for 140 years? And what would happen to family life if nine or 10 generations of the same family were all alive at the same time? Research into ageing may enable women to remain fertile for longer. And that raises the prospect of having 100-year-old parents, or brothers and sisters born 50 years apart. We think of an elder sibling as someone who can protect us and offer help and advice. That would be hard to do if that sibling came from a completely different generation. Working life would also be affected, especially if the retirement age was lifted. More people would stay in work for longer. That would give us the benefits of age-skill, wisdom and good judgement. On the other hand, more people working for longer would create greater competition for jobs. It would make it more difficult for younger people to find a job. Top posts would be dominated by the same few individuals, making career progress more difficult. And how easily would a 25-year-old employee be able to communicate with a 125-year-old boss? Young people would be a smaller part of a society in which people lived to 140. It may be that such a society would place less importance on guiding and educating young people, and more on making life comfortable for the old. And society would feel very different if more of its members were older. There would be more wisdom, but less energy. Young people like to move about. Old people like to sit still. Young people tend to act without thinking. Old people tend to think without acting. Young people are curious and like to experience different things. Old people are less enthusiastic about change. In fact, they are less enthusiastic about everything. The effect of anti-ageing technology is deeper than we might think. But as the science advances, we need to think about these changes now. "If this could ever happen, then we'd better ask what kind of society we want to get, " says Daniel Callahan. "We had better not go anywhere near it until we have figure those problems out. /

单选题The Case of the Disappearing Fingerprints One useful anti-cancer drug can effectively erase the whorls and other characteristic marks that give people their distinctive fingerprints. Losing (1) could become troublesome. A case released online in a letter by Annals of Oncology indicates how big a (2) of losing fingerprints is. Eng-Huat Tan, a Singapore-based medical doctor describes a 62-year old man who has used capecitabine to (3) his nasopharyngeal cancer. After three years on the (4) . the patient decided to visit U. S. relatives last December. But he was stopped by U. S. customs officials (5) 4 hours after entering the country when those officials couldn't get fingerpints from the man. There were no distinctive swirly (6) appearing from his index finger. U. S. customs has been fingerprinting incoming foreign visitors for years, Tan says. Their index fingers are (7) and screened against digital files of the fingerprints of bad guys-terrorists and potential criminals that our federal guardians have been tasked with keeping out of the country. Unfortunately, for the Singaporean traveler, one potential (8) effect of his drug treatment is a smoothing of the tissue on the finger pads. (9) , no fingerprints. "It is uncertain when fingerprint loss will (10) to take place in patients who are taking capecitabine, " Tan points out. So he cautions any physicians who (11) the drug to provide their patients with a doctor's note pointing out that their medicine may cause fingerprints to disappear. Eventually, the Singapore traveler made it into the United States. I guess the name on his passport didn't raise any red flags. But he's also now got the explanatory doctor's note — and won't leave home (12) it. By the way, maybe the Food and Drug Administration, (13) approved use of the drug 11 years ago, should consider (14) its list of side effects associated with this medicine. The current list does note that patients may experience vomiting, stomach pain and some other side effects. But no where (15) it mention the potential for loss of fingerprints.

单选题They had a far better {{U}}yield{{/U}} than any other farm miles around this year. A. goods B. soil C. climate D. harvest

单选题What happened when honey badgers got used to humans around them?