单选题We should never Ucontent/U ourselves with only a little knowledge.

单选题Easy Death In ancient Greek, the term euthanatos meant "easy death". Today euthanasia (安乐死) generally refers to mercy killing, the voluntary (自愿) ending of the life of someone who is terminally ill. Like abortion, euthanasia has become a legal, medical, and moral issue over which opinion is divided. Euthanasia can be either active or passive. Active euthanasia means that a physician or other medical personnel takes an action that will result in death, such as giving an overdose of deadly medicine. Passive euthanasia means letting a patient die for lack of treatment, or stopping the treatment that has begun. Examples of passive euthanasia include taking patients off a breathing machine or removing other life-support systems. Stopping the food supply is also considered passive. A good deal of the debate about mercy killing originates from the decision-making process. Who decides whether a patient is to die? This issue has not been solved legally in the United States. The matter is left to state law, which usually allows the physician in charge to suggest the option of death to a patient's relatives, especially if the patient is brain dead. In an attempt to make decisions about when their own lives should end, several terminally ill patients in the early 1990s used a controversial suicide device, developed by Dr. Jack Kevorkian, to end their lives. In parts of Europe, the decision-making process has become very flexible. Even in cases where the patients are not brain dead, patients have been put to death without their approval at the request of relatives or at the suggestion of physicians. Many cases of passive euthanasia involve old people or newborn infants. The principle justifying this practice is that such individuals have a "life not worthy of life". In countries where passive euthanasia is not legal, the court systems have proved very tolerant in dealing with medical personnel who practice it. In Japan, for example, if physicians follow certain guidelines they may actively carry out mercy killings on hopelessly ill people. Courts have also been somewhat tolerant of friends or relatives who have assisted terminally ill patients to die.

单选题We are Usure/U that he will get over his illness.

单选题When she was invited to the party, she {{U}}readily{{/U}} accepted. A. willingly B. suddenly C. firmly D. quickly

单选题Only his relatives knew he had a fatal illness.______

单选题Once Daily Pill Could Simplify HIV Treatment Bristol-Myers Squibb and Gilead Sciences have combined many HIV drugs into a single pill. Sometimes the best medicine is more than one kind of medicine. Malaria, tuberculosis and HIV/AIDS, 1 , are all treated with combinations of drugs. But that can mean a lot of pill to take. It would be 2 drug companies combined all the medicines into a single pill, taken just once a day. Now, two companies say they have done that for people just 3 treatment for HIV, the virus that causes AIDS. The companies are Bristol-Myers Squibb and Gilead Science. They have 4 single pill that combines three drugs currently on the market. Bristol-Myers Squibb sells one of them 5 the name of Sustiva. Gilead combined the 6 , Emtriva and Viread, into a single pill in two thousand four. Combining drugs involves more than 7 issues. It also involves issues of competition 8 he drugs are made by different companies. The new once-daily pill is the result of 9 is described as the first joint venture agreement of its kind in the treatment of HIV. In January the New England Journal of Medicine published a study of the new pill. Researcher compared its 10 o that of the widely used combination of Sustiva and Combivir. Combivir 11 two drugs, AZT and 3TC. The researchers say that after one year of treatment, the new pill suppressed HIV levels in more patients and with fewer 12 effects. Gilead paid for the study. Professor Joel Gallant at the Johns Hopkins School of Medicine in Baltimore, Maryland, led the research. He is a paid adviser to Gilead and Bristol-Meyers Squibb as well as the maker of Combivir, Glaxo Smith Kline. Glaxo Smith Kline reacted 13 the findings by saying that a single study is of limited value. It says the effectiveness of Combivir has been shown in each of more than fifty studies. The price of the new once-daily pill has not been announced. But Gilead and Bristol-Myers Squibb say they will provide it at reduced cost to developing countries. They plan in the next few months to ask the United States Food and Drug Administration to approve the new pill. There are limits to who could take it 14 the different drugs it contains. For example, 15 omen are told not to take Sustiva because of the risk of birth disorders. Experts say more than forty million people around the world are living with HIV.

单选题To have a better understanding of a poem, one should A. discuss It with others. B. analyze it by oneself. C. copy It down in a notebook. D practise reading it aloud.

单选题Contact your doctor if the cough persists .

单选题It is no use debating the relative merits of this policy. A. making B. taking C. discussing D. expecting

单选题The local Uauthorities/U will take measures to deal with noise pollution in the area.

单选题{{B}}第三篇{{/B}} {{B}}Clone Farm{{/B}} Factory farming could soon enter a new era of mass production. Companies in the US are developing the technology needed to "clone" chickens on a massive scale. Once a chicken with desirable traits has been bred or genetically engineered, tens of thousands of eggs, which will hatch into identical copies, could roll off the production lines every hour. Billions of clones could be produced each year to supply chicken farms with birds that all grow at the same rate, have the same amount of meat and taste the same. This, at least, is the vision of the US's National Institute of Science and Technology, which has given Origen Therapeutics of Burlingame, California, and Embrex of North Carolina $4.7 million to help fund research. The prospect has alarmed animal welfare groups, who fear it could increase the suffering of farm birds. That's unlikely to put off the poultry industry, however, which wants disease-resistant birds that grow faster on less food. "Producers would like the same meat quantity but to use reduced inputs to get there," says Mike Fitzgerald of Origen. To meet this demand, Origen aims to "create an animal that is effectively a clone", he says. Normal cloning doesn't work in birds because eggs can't be removed and implanted. Instead, the company is trying to bulk-grow embryonic stem cells taken from fertilized eggs as soon as they're laid, "The trick is to culture the cells without them starting to distinguish, so they remain pluripotent," says Fitzgerald. Using a long-established technique, these donor cells will then be injected into the embryo of a freshly laid, fertilized recipient egg, forming a chick that is. a "chimera". Strictly speaking a chimera isn't a clone, because it contains cells from both donor and recipient. But Fitzgerald says it will be enough if, say, 95 percent of a chicken's body develops from donor cells. "In the poultry world, it doesn't matter if it's not 100 percent," he says. Another challenge for Origen is to scale up production. To do this, it has teamed up with Embrex, which produces machines that can inject vaccines into up to 50,000 eggs an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it. In future, Origen imagines freezing stem cells from different strains of chicken. If orders come in for a particular strain, millions of eggs could be produced in months or even weeks. At present, maintaining all the varieties the market might call for is too expensive for breeders, and it takes years to breed enough chickens to produce the billions of eggs that farmers need.

单选题In a laughter clinic, doctors

单选题Japan has a long trading tradition.

单选题This is not typical of English, but is a (feature) of the Chinese language.

单选题Many experts now believe that even if all space littering were to stop completely, the number of stray objects would continue to increase for centuries. The reason : debris is now so dense that objects will continue to crash into each other, creating even more objects, expanding the rubbish cloud geometrically. "We've been saying for years that these things are going to happen," says Nicholas Johnson, head of NASA's Orbital Debris Program Office. "Until they happen, it's hard to get people's interest. " What seems to best describe Nicholas Johnson's attitude towards what has happened?A. He is happy that people are starting to pay attention to the problem.B. He is critical that people have not paid enough attention to the problem.C. He is objective when commenting on the problem of cosmic junk.D. He is supportive to what people have done to deal with the problem.

单选题When you get angry, which of the followings should you do for the sake of health?

单选题The most successful magazines’ covers _____________.

单选题We"ll give every teacher space to develop.

单选题The conclusion can be deduced from the premises.

单选题Driven to Distraction Joe Coyne slides into the driver's seat, starts up the car and heads to town. The empty stretch of interstate gives way to urban congestion, and Coyne hits the brakes as a pedestrian suddenly crosses the street in front of him. But even if he hadn't stopped in time, the woman would have been safe. She isn't real. Neither is the town. And Coyne isn't really driving. Coyne is demonstrating a computerized driving simulator that is helping researchers at Old Dominion University (ODU) examine how in-vehicle guidance systems affect the person behind the wheel. The researchers want to know if such systems, which give audible or written directions, are too distracting — or whether any distractions are offset by the benefits drivers get from having help finding their way in unfamiliar locations. "We're looking at the performance and mental workload of drivers," said Caryl Baldwin, the assistant psychology professor leading the research, which involves measuring drivers' reaction time and brain activity as they respond to auditory and visual Cues. The researchers just completed a study of the mental workload involved in driving through different kinds of environments and heavy vs. light traffic. Preliminary results show that as people "get into more challenging driving situations, they don't have any extra mental energy to respond to something else in the environment," Baldwin said. But the tradeoffs could be worth it, she said. The next step is to test different ways of giving drivers navigational information and how those methods change the drivers' mental workload. "Is it best if they see a picture...that shows their position, a map kind of display?" Baldwin said. "Is it best if they hear it?" Navigational systems now on the market give point-by-point directions that follow a prescribed route. "They're very unforgiving," Baldwin said. "If you miss a turn, they can almost seem to get angry." That style of directions also can be frustrating for people who prefer more general instructions. But such broad directions can confuse drivers who prefer route directions, Baldwin said. Perhaps manufacturers should allow drivers to choose the style of directions they want, or modify systems to present some information in a way that makes sense10 for people who prefer the survey style, she said. Interestingly, other research has shown that about 60 percent of men prefer the survey style, while 60 percent women prefer the route style, Baldwin said. This explains the classic little thing of why men don't like to stop and ask for directions and women do, Baldwin added.