单选题I notified him that the meeting had been postponed. A. informed B. observed C. mocked D. misled

单选题The Case of the Disappearing Fingerprints One useful anti-cancer drug can effectively erase the whorls(螺纹) 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-HuatTan, 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 fingerprints 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While serving in the Senate in the early 1970's, Barbara Jordan supported legislation to Uban/U discrimination and to deal with environmental problems.

单选题We can no longer {{U}}put up{{/U}} with his actions．

单选题The nucleus of the atom is composed of swiftly moving protons and neutrons that are held together by very strong forces.

单选题{{B}}第三篇{{/B}} {{B}} An Exciting New World Opening to Civilian Scientists{{/B}} It is hard to track the blue whale, the ocean's largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior. So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular whale for 43 days, monitoring its sounds. This was possible because of the Navy's formerly top-secret system of underwater listening devices spanning the oceans. Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the shops of potential enemies. Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption (爆发) for the first time and that they plan similar studies. Other scientist have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures. The speed of sound in water is roughly one mile a second-slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it carries faint noises from a patient's chest to a doctor's ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.

单选题The scientists began to accumulate data. A. collect B. handle C. analyze D. investigate

单选题Jack consumes a pound of cheese a day.

单选题{{B}}第三篇{{/B}} Sport is not only physically challenging, but it can also be mentally challenging. Criticism from coaches, parents, and other teammates, as well as pressure to win can create an excessive amount of anxiety or stress for young athletes(运动员). Stress can be physical emotional, or psychological, and research has indicated that it can lead to burnout. Burnout has been described as dropping or quitting of an activity that was at one time enjoyable. The early years of development are critical years for learning about oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to cooperate with others, make friends, and gain other social skills that will be used throughout their lives. Coaches and parents should be aware, at all times, that their feedback to youngsters can greatly affect their children. Youngsters may take their parents' and coaches' criticisms to heart and find a flaw(缺陷)in themselves. Coaches and parents should also be cautious that youth sport participation does not become work for children. The outcome of the game should not be more important that the process of learning the sport and other life lessons. In today's youth sport setting, young athletes may be worrying more about who will win instead of enjoying themselves and the sport. Following a game, many parents and coaches focus on the outcome and find fault with youngsters' performances. Positive reinforcement should be provided regardless of the outcome. Research indicated that positive reinforcement motivates and has a greater effect on learning than criticism. Again, criticism can create high levels of stress, which can lead to burnout.

单选题The manager allocates duties to the clerks.

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。请根据文章的内容，从每题所给的4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} {{B}}Crystal Ear{{/B}} One day a friend asked my wife Jill if I wanted a hearing aid. "He certainly does," replied Jill. After hearing about a remarkable new product, Jill finally got up the nerve to ask me if I'd ever thought about getting a hearing aid. "No way," I said. "It would make me look 20 years older. .... No, no," she replied. "This is entirely different. It's Crystal Ear!" Jill was right. Crystal Ear is different--not the old-styled body worn or over-the-ear aid, but an advanced personal sound system so small that it's like contacts (隐形眼镜) for your ears. And Crystal Ear is super-sensitive and powerful, too. You will hear sounds your ears have been missing for years. Crystal Ear will make speech louder, and the sound is pure and natural. I couldn't believe how tiny it is. It 'is smaller than the tip of my little finger and it's almost invisible when worn. There are no wires, no behind-the-ear device. Put it in your ear and its ready-to-wear mold (形状) fits comfortably. Since it's not too loud or too tight, you may even forget that you're wearing it? Use it at work or at play. And if your hearing problem is worse in certain situations, use Crystal Ear only when you need it. Hearing loss, which occurs typically prior to teenage years, progresses throughout one's lifetime. Although hearing loss is now the world's number one health problem, nearly 90 percent of people suffering hearing loss choose to leave the problem untreated. For many millions, treating hearing loss in a conventional way can involve numerous office visits, expensive testing and adjustments to fit your ear. Thanks to Crystal Ear, the "sound solution" is now convenient. Almost 90 percent of people with mild hearing loss, and millions more with just a little hearing drop-off (下降), can be dramatically helped with Crystal Ear. Moreover, its superior design is energy-efficient, so batteries can last months. Crystal Ear is now available to help these people treat their hearing loss with a small hearing amplifier (放大器).

单选题Anxiety about financial matter Ulessened/U somewhat when, in 1910, the United States accepted responsibility for Liberia's survival.

单选题The room was filled with the scent, of flowers.A. atmosphereB. potC. featureD. odor

单选题{{B}}第一篇{{/B}} Cough is a normal physiologic reflex(生理反射) mediated by the "cough center" of the brain. The function of this reflex is to clear airways of inhaled irritants, debris(碎屑), or secretions that have accumulated as a result of bacterial or viral infection. Cough may also occur in response to irritation of inflame respiratory epithelium(呼息道上皮), as is commonly seen with some viral infections. Irritant-initiated cough often has little effect on clearance of secretions and is called "nonproductive cough"(咳痰). APPROACHES TO TREATMENT Cough accompanies many different disorders. Suppressing a productive cough(千咳)can interfere with normal defense mechanisms and be potentially harmful. Suppression of nonproductive cough is safer but is not essential. Antitussive(镇咳的) use is justifiable in severe cases in which nonproductive cough is causing emesis, exhaustion, or significant loss of sleep. ANTITUSSIVE AGENTS Three antitussive agents are commonly used: Codeine. Codeine suppresses the cough reflex by acting directly on the medullary(延髓的) cough center of the brain. Its drying effect on the respiratory mucosa can increase the viscosity of bronchial secretions. Antitussive effects of codeine are dose dependent in adults, but complete cough suppression may not be possible at nontoxic doses. Although codeine is the standard against which other antitussive medications are compared, it may be less effective in children than in adults. The recommended dosage for children is 1mg/kg/day in four divided doses(maximum of 60 mg/day). Antitussive effects are greatest at one to two hours and persist for about four hours. Nausea, vomiting, constipation, and dizziness are the most common side effects. In over doses, toxicity consists primarily of respiratory depression and narcosis. Limited data suggest that single doses of more than 5 mg/kg may be lethal in children. Infants may be more sensitive to codeine' s effects and may have decreased ability to metabolize the drug, thus, use of codeine in children less than one year old should be discouraged. Dextromethorphan(美沙芬). Like codeine, dextromethorphan has antitussive activity but a very low addictive potential. In adults, the two drugs are considered equipotent. Dextromethorphan's antitussive effect can begin as early as 15 to 30 minutes after a dose is taken, and its duration of action is between three and six hours. Because the drug is metabolized through oxidative pathways, infants metabolize dextromethorphan slowly and are at greater risk of dose-dependent side effects, particularly if given multiple doses. Dextromethorphan and codeine both act at the same central nervous system(CNS)site. Although CNS depression can be seen with either agent, dextromethorphan has a wider margin of safety. Overdoses of up to 100 times the usual adult dose have not resulted in any fatalities. Treatment of overdose should include supportive measures and use of naloxone(纳洛酮), if respiratory depression occurs. Minor adverse effects (副作用) sometimes seen in nonintoxicated patients include nausea, dizziness, and slight drowsiness. Diphenhydramine(苯海拉明). The antihistamine diphenhydramine has weak anti tussive effects. These effects may often be incomplete, however, and cough suppression may not be achived without side effects. In addition to acting on medullary cough centers, diphenhydramine has peripheral anticholinergic(抗胆碱能的) effects that may contribute to its cough-suppressing action. The anticholinergic effects may also help to dry the respiratory tract and thicken secretions—undesirable effects in patients with productive cough. In adults, 25 to 50 mg of diphenhydramine has produced cough suppression equivalent to that of 15 mg of codeine. Similar data in children are not available. GUIDELINES FOR USE OF ANTITUSSIVES ·Remember that cough is a sign of a disorder, and it does not always require an antitussive. If it is caused by another disorder (e. g., foreign body, allergy, or asthma), therapy is more appropriately directed at the underlying cause. ·Do not suppress productive cough associated with chronic pulmonary diseases such as cystic fibrosis, asthma, or chronic bronchitis. Concentrate on good fluid intake, to help mobilize pulmonary secretions, and treatment of the underlying disorder. ·Remember that suppression of mild cough that commonly accompanies a cold or uncomplicated respiratory tract infection has not been proven to be either safe or harmful. ·Teach parents that cough is a protective mechanism—not something to be stopped. Stress that the expectorants, anti-histamines, and decongestants contained in many cough preparations have not been shown to be more effective than an antitussive agent used alone. ·Centrally acting cough suppressants are specifically contraindicated in the acute phases of pertussis(百日咳) and acute bronchial asthma because they can contribute to plugging(堵塞) of mucus and lead to clinical deterioration(恶化).

单选题Other women seemed contented and they even exhibited their bellies with pride.A. demonstratedB. uncoveredC. spreadD. showed

单选题She was one of the leading writers in her age.______

单选题The fire dance is the {{U}}climax of {{/U}}the ceremony of the Navajo night chants.

单选题Much more countries have signed the FCTC that those that__________

单选题In the two weeks leading up to my grandmother's death from lung cancer last January - hree months shy of her 92nd birthday - she was transferred through four separate health - care facilities and six different beds. First, there was a hospice, where she was not allowed to receive more than just "respite" care. Next, she was moved to an assisted - living facility, where she fell, twice. After her second fall, she was strapped to a gumey and pulled along a bumpy sidewalk through a snowstorm to an awaiting ambulance. She was taken to the emergency room at New York's Lenox Hill Hospital. Ten hours later, she was assigned to a bed. She stayed for three days before being transferred to another hospice, where she died minutes after she arrived. If my father hadn't redirected the ambulance driver who took her from Lenox Hill to the second hospice, she would have died in the back of a van headed in the wrong direction. My grandmother died.A. two weeks ago.B. last January.C. on her 92nd birthday.D. three months ago.

单选题 Egypt Felled by Famine Even ancient Egypt's mighty pyramid builders were powerless in the face of the famine that helped bring down their civilisation around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometres to the south was ultimately to blame -- and the same or worse could happen today. The ancient Egyptians depended on the Nile's annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods. Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile4. The Blue Nile mud has a different isotope signature from that of the White Nile. So by analysing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river. Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river' would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypt's Old Kingdom. The weakened waters would have been catastrophic for the Egyptians. "Changes that affect food supply don't have to be very large to have a ripple effect in societies," says Bill Ryan of the Lamont Doherty Earth Observatory in New York. Similar events today could be even more devastating, says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D.C. "Anything humans do to shift the climate belts would have an even worse effect along the Nile system today because the populations have increased dramatically./