单选题We derive information mainly from the Internet.

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。 {{B}} Health Care in the US {{/B}} Health care in the US is well-known but very expensive. Paying the doctor's bill after a major illness or accident can cost hundreds of thousands of dollars. In the US, a person's company, not the government, pays for health insurance. Employers have contracts with insurance companies, which pay for all or part of employees' doctors' bills. The amount that the insurance company will pay out to a patient differs wildly. It all depends on what insurance the employer pays. The less the boss pays to the insurance company, the more the employee has to pay the hospital each time he or she gets sick. In 2004, the average worker paid an extra US$558 a year, according to a San Francisco report. The system also means many Americans fall through the cracks (遭遗漏). In 2004, only 61 per cent of the population received health insurance through their employers, according to the report. The unemployed, self-employed, part-time workers and graduated students with no jobs were not included. Most US university students have a gap between their last day of school and their first day on the job. Often, they are no longer protected by their parents' insurance because they are now considered independent adults. They also cannot buy university health insurance because they are no longer students. Another group that falls through the gap of the US system is international students. All are required to have health insurance and cannot begin their classes without it. But exact policies (保险单) differ from school to school. Most universities work with health insurance companies and sell their own standard plan for students. Often, buying the school plan is required, but luckily it's also cheaper than buying direct from the insurance company.

单选题Although people are able to generate a wide range of vocal sounds, any given language used only a small fraction of them.A. validB. voicedC. measurableD. meaningful

单选题 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 {{B}}Happy Marriage, Happy Heart{{/B}} Happily married people have lower blood pressure{{U}} (51) {{/U}}unhappily married people or singles, a Brigham Young University study says. On the other hand, even having a supportive social network did not translate into a blood pressure benefit for singles or unhappily{{U}} (52) {{/U}}people, according to the study. "There seems to be some unique health benefits from marriage. It's not just being married{{U}} (53) {{/U}}benefits health—what's really the most protective of health is having a happy{{U}} (54) {{/U}}," study author Julianne Holt-Lunstad, a psychologist who specializes in relationships and health, said in a prepared statement. The study included 204 married and 99{{U}} (55) {{/U}}adults who wore portable blood-pressure monitors for 24 hours. The{{U}} (56) {{/U}}recorded blood pressure at random intervals and provided a total of about 72 readings. "We wanted to capture participants' blood pressure doing whatever they normally{{U}} (57) {{/U}}in everyday life. Getting one or two readings in a clinic is not really{{U}} (58) {{/U}}of the fluctuations (波动) that occur throughout the day,' Holt-Lunstad said. Overall, happily married people scored four points{{U}} (59) {{/U}}on the blood pressure readings than single adults. The study also found that blood{{U}} (60) {{/U}}among married people—especially those in happy marriages{{U}} (61) {{/U}}more during sleep than in single people. "Research has shown that people whose blood pressure remains high throughout the night are at{{U}} (62) {{/U}}greater risk of heart disease than people whose blood pressure drops," Holt-Lunstad said. The study was published in the March20{{U}} (63) {{/U}}of the journal Annals (年刊) of Behavioral Medicine. The study also found that unhappily married adults have higher blood pressure than{{U}} (64) {{/U}}happily married and single adults. Holt-Lunstad noted that married couples can encourage healthy habits in one{{U}} (65) {{/U}},such as eating a healthy diet and having regular doctor visits. People in happy marriages also have a source of emotional support, she said.

单选题Research indicates that men find it easier to give up smoking than women.A. provesB. showsC. findsD. concludes

单选题We have to ask them to {{U}}quit{{/U}} talking in order that all people present could hear us clearly. A. decrease B. cease C. continue D. keep on

单选题{{B}}第二篇{{/B}} Moods, say the experts, are emotions that tend to become fixed, influencing one's outlook for hours, days or even weeks. That's great if your mood is a pleasant one, but a problem if you are sad, anxious, angry or simply lonely. Perhaps the best way to deal with such moods is to talk them out; sometimes, though, there is no one to listen. Modern pharmacology(药理学)offers an abundance of tranquilizers(安眠药), anti-depressants and anti-anxiety drugs. What many people don't realize, however, is that scientists have discovered the effectiveness of several non-drug approaches to make you loose from an unwanted mood. These can be just as useful as drugs, and have the added benefit of being non-poisonous. So next time you feel out of sorts, don't head for the drug-store, try the following approach. Of all the mood-altering self-help techniques, aerobic(增氧健身的)exercise seems to be the most efficient cure for a had mood. "If you could keep the exercise, you'd be in high spirits," says Kathryn Lance, author of Running for Health and Beauty. Researchers have explained biochemical and various other changes that make exercise compare favorably to drugs as a mood-raiser. Physical exertion such as housework, however, does little. The key is aerobic exercise--running, cycling, walking, swimming or other repetitive and sustained activities that boost the heart rate, increase circulation and improve the body's utilization of oxygen. Do them for at least 20 minutes a session, three to five times a week.

单选题Showing some sense of humor can be a(n) ______ way to deal with some stressful situationA. effectiveB. efficientC. favorableD. favorite

单选题You should use ______ language when you write a business letter.A. formalB. politicalC. magicD. plain

单选题Boil drinking water for at least five minutes, to kill the {{U}}germs{{/U}}, then let it cool in a clean container. Keep it covered.

单选题There are hardly any risks involved in cosmetic operations.

单选题The police contended that the difficulties they faced were too severe.

单选题As my train wasn't due to leave for another hour, I had plenty of time to spare. After buying some newspaper to read on the journey, I made my way to the luggage office to collect the heavy suitcase I had left there 3 clays before. There were only a few people waiting, and I took out my wallet to find the receipt for my case. The receipt didn't seem to be where l had left it. I emptied the contents of the wallet, and railway-tickets, money, scraps of paper, and photographs fell out of it; but no matter how hard I searched, the receipt was nowhere to be found. When my turn came, I explained the situation sorrowfully to the assistant. The man looked at me suspiciously as if to say that he had heard this type of story many times and asked me to describe the case. I told him that it was an old, brown-looking object no different from the many cases I could see on the shelves. The assistant then gave me a form and told me to make a list of the chief contents of the case. If they were correct, he said, I could take the case away. I tried to remember all the articles I has hurriedly packed and wrote them down as they came to me. After I had done this I went to look among the shelves. There were hundreds of cases there and fur one dreadful moment, it occurred to me that if someone had picked the receipt up, he could have easily claimed the case already. This hadn't happened fortunately, for after a while I found the case lying in a corner. After examining the articles inside, the assistant was soon satisfied that it was mine and told me I could take the case away. Again I took out my wallet: this time to pay. I pulled out a ten-shilling note and the "lost" receipt slipped out with it. I couldn't help blushing and looked up at the assistant, he was nodding his head knowingly, as if to say that he had often seen this hap pen before too.

单选题I seldom watch TV.

单选题Breastfeeding Can Cut Cardiovascular (心血管的) Risk Breastfeeding can reduce the risk of a heart attack or stroke later in life and could prevent hundreds of 1 of deaths each year, researchers said on Friday. Babies who are breastfed have fewer childhood infections and allergies (过敏) and are less 2 to obesity (肥胖). British scientists have now shown that breastfeeding and slow growth in the first weeks and months of life has a protective effect 3 cardiovascular disease. "Diets that promote more rapid growth put babies at risk many years later in 4 of raising their blood pressure, raising their cholesterol (胆固醇) and increasing their tendency to diabetes (糖尿病) and obesity—the 5 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 breastfed babies do better is because they grow more 6 in the early weeks." Lucas said the effects of breastfeeding on blood pressure and cholesterol later in life are greater than 7 adults can do to control the risk factors for cardiovascular disease, other than taking drugs. An estimated 17 million people die of 8 disease, particularly heart attack and strokes each year, according to the World Health Organization. Lucas and his colleagues compared the health of 216 teenagers 9 as babies had either been breastfed or given different nutritional baby formulas. They reported their 10 in medical journal. The teenagers who had been 11 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 12 of the child"s weight at birth, the faster the infants grew in the early weeks and months of life, the 13 was their later risk of heart disease and stroke. The effect was the 14 for both boys and girls. "The more human milk you have in the new born period, the lower your cholesterol level is and the lower your blood pressure is 16 years 15 ," Lucas said.

单选题{{B}}第三篇{{/B}}{{B}}NewAttemptstoEradicateAIDSVirus{{/B}}Ahigh-profileattempttoeradicatetheAIDSvirusinafewpatientscontinuestoshowpromise.Butresearcherswon'tknowforayearormorewhetheritwillwork,scientistDavidHotoldjournalistshereWednesdayfortheFourthConferenceinVirusesandInfections."Thisisastudythat'sinprogress,"saysHo,headoftheAaronDiamondAIDSResearchCenter,NewYork.Thestudyinvolves20peoplewhostartedcombinationsofanti-HIVdrugsveryearlyinthecourseofthedisease,within90daysoftheirinfections.They'vebeentreatedforupto18months.Fourothershavedroppedoutbecauseofsideeffectsorproblemscomplyingwiththeexactingdrugsystem.ThedrugshaveknockedtheAIDSvirusdowntoundetectablelevelsinthebloodofallremainingpatients,sAnd,inthelatestdevelopment6,scientistshavenowtestedlymphnodesandsemenfromafewpatientsandfoundnovirusreproducingthere,Hosays."Bearinmindthat?undetectabledoesnotequalabsent,"Hosays.Hohascalculatedthatthedrugsshouldbeabletowipeoutremainingviruses--atleastfromknownreservoirsthroughoutthebody--intwotothreeyears.Buttheonlywaytoproveeradicationwouldbetostopthedrugsandseeiftheviruscomesback8.OnWednesday,Hosaidhewouldn'taskanypatienttoconsiderthatstepbefore2yearsoftreatment.Andheemphasizedthatheisnoturgingwidespreadadoptionofsuchearly,aggressivetreatmentoutsideoftrials9.Nooneknowsthelong-termrisks.Butotherscientistsarelookingatsimilarexperiments.Afederallyfundedstudywillput300patientsontriple-drugtreatmentsandthenseeifsomerespondingwellaftersixmonthscancontinuetosuppressthevirusonjustoneortwodrugs,saysresearcherDouglasRichmanoftheUniversityofCalifornia,SanDiego.Somepatientsinthatstudyalsomaybeofferedthechancetostoptherapyafter18monthsormore,hesays.

单选题The young man was so ______ and he always donates some money to those people in trouble.A. handsomeB. genuineC. talentedD. generous

单选题In 1976 more than 500 people contracted an autoimmune disease called Guillain - Barresyndrome after receiving swine - flu shots in response to a small outbreak in Fort Dix, N. J. Some people understandably fear a repeat of that tragic episode, However, vaccine, production techniques have changed since then. Today, vaccines are highly purified to eliminate any potential contaminants. In addition, scientists use only selected viral proteins in the shots, not the entire virus, as they did in the 1970s. "The public is comparing this vaccine to the 1976 swine--flu vaccine," says CDC spokesperson Abbigail Tumpey. "In fact, the best comparison is to the seasonal vaccines of the last ten years. " Nowadays ,vaccines are highly purified toA. remove people's fear for vaccine.B. avoid repeating the tragic episode in 1976.C. get rid of any possible contaminants.D. improve vaccine -production techniques.

单选题The secretary is expected to {{U}}explore{{/U}} ideas for post-war reconstruction of the area. A. deny B. investigate C. stress D. create

单选题For young children, getting dressed is a complicated business.