单选题My life is more precious to me than my property.A. valuableB. profitableC. dearD. noble

单选题下面的短文有15处空白，请根据短文的内容为每处空白处确定一个最佳选项。 Jewel Thief Captured At 1:30 this morning, local police finally caught the jewel thief whom they had been trying to trap (诱捕) for the past two months. {{U}}(51) {{/U}} the man they arrested, James Smith, {{U}}(52) {{/U}} that he was the thief, he was captured with several diamond rings in his {{U}}(53) {{/U}}. Po- lice saw Smith leaving a jewelry store on Main Street at 1:16 A, M.. {{U}}(54) {{/U}} seeing the police, Smith jumped {{U}}(55) {{/U}} his auto, and a high-speed chase followed for the next fourteen minutes. The police finally {{U}}(56) {{/U}} Smith off the road and his {{U}}(57) {{/U}} hit a tree. When the police searched Smith's {{U}}(58) {{/U}}, they found the diamond rings hidden in an inside pocket of his jacket. Although Smith claimed that the diamonds were fake (假的), the owner of the jewelry store {{U}}(59) {{/U}} the most recent robbery incident happened identified them {{U}}(60) {{/U}} his missing jewels. Smith is now awaiting his first visit to court in a cell in the town jail. If he does not {{U}}(61) {{/U}}, a jury (陪审团) will have to decide his guilt or innocence. {{U}}(62) {{/U}}, a representative of the police stated today that they have no {{U}}(63) {{/U}} that he will be found to be {{U}}(64) {{/U}}. This spokesman also stated that they hoped that the alarm {{U}}(65) {{/U}} in the community by all the recent robberies would be calmed by Smith's arrest.

单选题These are defensive behavior patterns which derive from our fears.

单选题Maine is justly famous for its beautiful lakes and ponds.A. onlyB. rightfullyC. legallyD. simply

单选题He is renowned for his skill.

单选题 Listening Device Provides Landslide Early Warning A device that provides early warning of a landslide by monitoring vibrations in soil is being tested by UK researchers. The device could save thousands of lives each year by warning when an area should be evacuated, the scientists say. Such natural disasters are common in countries that experience sudden, heavy rainfall, and can also he triggered by earthquakes and even water erosion. Landslides start when a few particles of soil or rock within a slope start to move, but the early stages can be hard to spot. Following this initial movement, "Slopes can become unstable in a matter of hours or minutes," says Nell Dixon at Loughborough University, UK. He says a warning system that monitors this movement might be enough to evacuate a block of fiats or clear a road, and save lives. The most common way to monitor a slope for signs of an imminent landslide is to watch for changes in its shape. Surveyors can do this by measuring a site directly, or sensors sunk into boreholes or fixed above ground can be used to monitor the shape of a slope. Slopes can, however, change shape without triggering a landslide, so either method is prone to causing false alarms. Now Dixon's team has developed a device that listens for the vibrations caused when particles begin moving within a slope. The device takes the form of a steel pipe dropped into a borehole in a slope. The borehole is filled in with gravel around the pipe to help transmit high-frequency vibrations generated by particles within the slope. These vibrations pass up the tube and are picked up by a sensor on the surface. Software analyses the vibration signal to determine whether a landslide may be imminent. The device is currently being tested in a 6-metre-tall artificial clay embankment in Newcastle, UK. Early results suggest it should provide fewer false positives than existing systems. Once it has been carefully and thoroughly tested, the device could be used to create a complete early-warning system for dangerous slopes. "Locations with a significant risk of landslides could definitely benefit from a machine like this," says Adam Poulter, an expert at the British Red Cross, "as long as it doesn't cost too much." But, Poulter adds that an early-warning system may not be enough on its own. "You need to have the human communication," he says. "Making systems that get warnings to those who need them can be difficult."

单选题He {{U}}was faced with {{/U}}the harsh climate, which, with the help of his fellow countrymen, he finally overcame it.

单选题He was able to {{U}}mend{{/U}} the cup and saucer.

单选题We all think that Mary’s husband is a very boring person.

单选题NewAttemptstoEradicateAIDSVirusA.high-profileattempttoeradicatetheAIDSvirusinafewpatientscontinuestoshowpromise.Butresearcherswon'tknowforayearormorewhetheritwillwork,scientistDavidHotoldjournalistshereWednesdayfortheFourthConferenceinVirusesandInfections."Thisisastudythat'sinprogress,"saysHo,headoftheAaronDiamondAIDSResearchCenter.NewYork.Thestudyinvolves20peoplewhostartedcombinationsofanti-HIVdrugsveryearlyinthecourseofthedisease,within90daysoftheirinfections.They'vebeentreatedforupto18months.Fourothershavedroppedoutbecauseofsideeffectsorproblemscomplyingwiththeexactingdrugsystem.ThedrugshaveknockedtheAIDSvirusdowntoundetectablelevelsinthebloodofallremainingpatients.And,inthelatestdevelopment,scientistshavenowtestedlymphnodesandsemenfromafewpatientsandfoundnovirusreproducingthere,Hosays."Bearinmindthatundetectabledoesnotequalabsent,"Hosays.Hohascalculatedthatthedrugsshouldbeabletowipeoutremainingviruses—atleastfromknownreservoirsthroughoutthebody—intwotothreeyears.Buttheonlywaytoproveeradicationwouldbetostopthedrugsandseeiftheviruscomesback.OnWednesday,Hosaidhewouldn'taskanypatienttoconsiderthatstepbeforeyearsoftreatment.Andheemphasizedthatheisnoturgingwidespreadadoptionofsuchearly.aggressivetreatmentoutsideoftrials.Nooneknowsthelong-termrisks.Butotherscientistsarelookingatsimilarexperiments.Afederallyfundedstudywillput300patientsontriple-drugtreatmentsandthenseeifsomerespondingwellaftersixmonthscancontinuetosuppressthevirusonjustoneortwodrugs,saysresearcherDouglasRichmanoftheUniversityofCalifornia,SanDiego.Somepatientsinthatstudyalsomaybeofferedthechancetostoptherapyafter18monthsormore,hesays.

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}}Exercise Lowers Employers' Health Costs{{/B}} Companies can save millions in health-care costs simply by encouraging their employees to exercise a little bit, researchers reported on Friday. They said obese (肥胖的) employees had higher health-care costs, but lowered those expenses by exercising just a couple of times a week — without even losing any weight. Feifei Wang and colleagues at the University of Michigan studied 23,500 workers at General Motors. They estimated that getting the most sedentary (惯于久坐的) obese workers to exercise would have saved about $790,000 a year, or about 1.5I percent of health-care costs for the whole group. Company-wide, the potential savings could reach $7.1 million per year, they reported in the Journal of Occupational and Environmental Medicine. Of the whole group of workers, about 30 percent were of normal weight, 45 percent were overweight (超重的), and 25 percent were obese. Annual health-care costs averaged $2,200 for normal weight, $2,400 for the overweight, and $2,700 for obese employees. But among workers who did no exercise, health-care costs went up by at least $100 a year, and were $3,000 a year for obese employees who were sedentary. But adding two or more days of light exercise — at least 20 minutes of exercise or work hard enough to increase heart rate and breathing — lowered costs by on average $500 per employee a year, the researchers found. "This indicates that physical activity behavior could reduce at least some of the harmful effects of excess body fat, and in consequence, help lower the health-care costs," Wang and colleagues wrote.

单选题The police{{U}} contended{{/U}} that the difficulties they faced were too severe.

单选题Mary has derived a good deal of benefit from her job.

单选题The woman's {{U}}scowl{{/U}} showed she was not satisfied with the service here.

单选题Which of the following is NOT mentioned as a step to control smoking?

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 Researchers have known for years that animals have a "clock" somewhere in their brains a control-centre that regulates circadian(生物节奏的) rhythms. Circadian rhythms are the body's daily biological cycles, controlling such activities as sleep and wakefulness. In November 1988, neuroscientists at the University of Virginia in Charlotteville reported that the supra chasmatic nucleus(SCN), a small cluster(束)of cells in the middle of the brain that neuroscientists have long suspected of playing a role in daily rhythms, is the long-sought biological clock. The investigators performed a series of tissue-transplant experiments with hamsters (仓鼠). Some of the animals were normal hamsters, which have a circadian cycle of 24 hours; the others were mutant(变异型)hamsters whose cycles were only 20 or 22 hours long. The scientists first removed the SCN from the brans of the hamsters in both groups. They then implanted an SCN from a mutant hamster into the brain of each normal animal, and vice versa. When the hamsters had recovered from their operations, the circadian rhythms of the two groups were reversed. The normal hamsters had a daily cycle of 20 to 22 hours, and the mutants were on a 24-hour cycle. The identification of the internal clock is an important stepping-stone in understanding the basic, automatic mechanisms of brain function. It may also help in finding ways to relieve human sleep disorders.

单选题The planned general strike represents a vital economic challenge to the government. A. an important B. a specific C. a quick D. a trivial

单选题We {{U}}explored{{/U}} the possibility of closer trade links at the conference.

单选题Louis was asked to {{U}}name{{/U}} the man who stole her purse.

单选题It can be inferred from the last paragraph that