单选题Because Uadministering/Uthe whole company, he sometimes has to work around the clock.

单选题Internet Internet use appears to cause a drop in psychological health, according to research at Carnegie Mellon University. Even people who spent just a few hours a week on the Internet experienced more bad feelings and loneliness than those who was online less frequently, the two-year study showed. Researchers are puzzling over the results, which were completely contrary to their expectations. They expected that the Net would prove socially healthier than television, since the Net allows users to choose their information and to commnunicate with others. The fact that Internet use reduces time available for family and friends may account for the drop in psychological health, researchers hypothesized (推测). Faceless, bodiless "virtual" communication may be less psychologically satisfying than actual conversation, and the relationships formed through it may be shallower. Another possibility is that exposure to the wider world through the Net makes users less satisfied with their lives. "But it's important to remember this is not about the technology, it's about how it is used," says psychologist Christine Riley of Intel, one of the study's sponsors. "It really points to the need for considering social factors in terms of how you design applications and services for technology. /

单选题What makes a major success in Los Angeles is the strength of his public support. A. concentration B. intensity C. conservation D. stress

单选题Penguins do not suffer from the cold in Antarctica because their feathers secrete protective oil.

单选题Better Control of TB Seen If a Faster Cure Is Found The World Health Organization estimates that about one-third of all people are infected with bacteria that cause tuberculosis. Most times, the infection remains inactive. But each year about eight million people develop active cases of TB, usually in their (51) . Two million people die (52) it. The disease has (53) with the spread of AIDS and drug-resistant forms of tuberculosis. Current treatments take at least six months. Patients have to (54) a combination of several antibiotic drugs daily. But many people stop (55) they feel better. Doing that can (56) to an infection that resists treatment. Public health experts agree that a faster-acting cure for tuberculosis would be more effective. Now a study estimates just how (57) it might be. A professor of international health at Harvard University led the study. Joshua Salomon says a shorter treatment program would likely mean not just more patients (58) . It would also mean (59) infectious patients who can pass on their infection to others. The researchers developed a mathematical model to examine the effects of a two-month treatment plan. They (60) the model with current TB conditions in Southeast Asia. The scientists found that a two-month treatment could prevent about twenty percent of new cases. And it might (61) about twenty-five percent of TB deaths. The model shows that these (62) would take place between two thousand twelve and two thousand thirty. That is, if a faster cure is developed and in wide use by two thousand twelve. The Word Health Organization (63) the DOTS program in nineteen ninety. DOTS is Directly Observed Treatment, Short-course. Health workers watch tuberculosis patients take their daily pills to make (64) they continue treatment. Earlier this year, an international partnership of organizations announced a plan m expand the DOTS program. The ten-year plan also aims to finance research (65) new TB drugs. The four most common drugs used now are more than forty years old. The Global Alliance for TB Drug Development says its long-term goal is a treatment that could work in as few as ten doses.

单选题The normal price of a ticket for an adult is $230.

单选题After-birth Depression Blamed for Woman"s Suicide A new mother apparently suffering from postpartum mental illness fell to her death from a narrow 12th-floor ledge of a Chicago hotel, eluding the lunging grasp of firemen called to help. The Chicago Tribune reported Tuesday that the mother of a 3-month-old daughter, Melanie Stokes, 41, was said to be suffering from a severe form of after-birth depression called postpartum psychosis, an extremely rare biological response to rapidly changing hormonal levels that can result in hallucinations, delusions, severe insomnia and a drastic departure from reality. "That was a monster in my daughter"s brain," said Stokes" mother, Carol Blocker. "The medicine took no effect at all, while her grief was so strong that nothing could make up for it. I"m just glad she didn"t take her daughter with her." Virtually all new mothers get postpartum blues, also called the "baby blues", which are brief episodes of irritability, moodiness and weepiness. About 20 percent of birthing women experience postpartum depression, which can be triggered by hormonal changes, sleeplessness and the pressures of being a new mother. It is often temporary and highly treatable. But The Tribune said what scientists suspect Stokes was battling, postpartum psychosis, is even more extreme and is considered a psychiatric emergency. During postpartum psychosis—a very real disorder that affects less than 1 percent of women, according to the National Institute of Mental Health—a mother might hear voices, have visions, feel extremely agitated and be at risk of harming the child or herself. Often the consequences are tragic. In 1987, Sheryl Masip of California told a judge that postpartum psychosis made her drive a Volvo over her 6-week-old son. Latrena Pixley of Washington, D. C., said the disorder was why she smothered her 6-week-old daughter in 1922. And last year, Judy Kirby, a 31-year-old Indianapolis mother allegedly suffering from postpartum psychosis, sped into oncoming traffic and plowed into a minivan, killing seven youngsters, including three of her own.

单选题There's no {{U}}fun{{/U}} in spending the whole evening playing cards.

单选题The price of this machine is not reasonable.A. helpfulB. kindC. fairD. effective

单选题"I'm not meddling," Mary said {{U}}mildly{{/U}}. "I'm just curious." A. gently B. shyly C. weakly D. sweetly

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

单选题The construction of the bridge is said to have been terminated .

单选题The great changes of the city astonished every visitor to that city.

单选题The oscillator was easier to use, more stable, and less expensive than others available at the time. A. changeable B. unchanging C. diverse D. strong

单选题He had merely come out for a {{U}}stroll. {{/U}}

单选题Eat Healthy "Clean your plate!" and "Be a member of the clean-plate club!" Just about every kid in the UK has heard this from a parent or grandparent. Often, it"s 1 by an appeal: "Just think about those starving orphans in Africa!" Sure, we should be 2 for every bite of food. Unfortunately, many people in the UK take too many bites. Instead of staying "clean the plate", perhaps we should 3 some food for tomorrow. According 4 the news reports, UK restaurants are partly to blame for the growing bellies(肚子). A waiter puts a plate of food in front of each customer, with two to four times the 5 recommended by the government, according to a UK Today story . The British traditionally 6 quantity with value and most restaurants try to give them that. They prefer to have customers complain 7 too much food rather than too little. Barbara Rolls, a nutrition professor at London University, told the Times that restaurant portion sizes began to grow in the 1970s, the same time that the British waistline began to 8 . Health experts have tried to get ninny restaurants to 9 smaller portions. Now, apparently, some customers are calling 10 this too. The restaurant industry trade magazine QSR reported last month that 57 percent of more than 4,000 people 11 believe restaurants serve portions that are too large; 23 percent had no opinion; 20 percent disagreed. But a closer 12 at the survey indicates that many Americans who can"t afford fine dining still prefer large portions. Seventy percent of 13 earning at least $150,000 per year prefer smaller portions; but only 45 percent of those earning less than $25,000 want smaller. It"s not 14 working class Americans don"t want to eat healthy. It"s just that, after long hours at low-paying jobs, getting less on their plate hardly seems like a good 15 . They live from paycheck to paycheck, happy to save a little money for next year"s Christmas presents.

单选题The audience {{U}}applauded{{/U}} enthusiastically after the performance at the Grand Old Opera.

单选题I had to raise my voice to make myself heard over the noise.A. changeB. increaseC. lowerD. rise

单选题The salesman approached the house cautiously because of the vicious dog.A. nervouslyB. bravelyC. carefullyD. deliberately

单选题We were {{U}}relieved{{/U}} to hear that you had arrived safely.