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"I have great confidence that by the end of the decade we’ll know in vast detail how cancer cells arise," says microbiologist Robert Weinberg, an expert on cancer, "But," he cautions, "some people have the idea that once one understands the causes, the cure will rapidly follow. Consider Pasteur. He discovered the causes of many kinds of infections, but it was fifty or sixty years before cures were available." This year, 50 percent of the 910 000 people who suffer from cancer will survive at least five years. In the year 2000, the National Cancer Institute estimates, that figure will be 75 percent. For some skin cancers, the five-year survival rate is as high as 90 percent. But other survival statistic(统计)rate still discouraging-13 percent for lung cancer, and 2 percent for cancer of the pancreas(胰腺). With as many as 120 varieties in existence, discovering how cancer works is not easy. The researchers made great progress in the early 1970s, when they discovered that oncogenes, which are cancer-causing genes(基因), are inactive in normal ceils. Anything from cosmic rays to radiation to diet may activate a dormant oncogene, but how remains unknown. If several oncogenes are driven into action, the cell, unable to turn them off, becomes cancerous. The exact mechanisms involved are still mysterious, but the likelihood that many cancers are initiated at the level of genes suggest that we will never prevent all cancers. "Changes are a normal part of the evolutionary process," says oneologist William Hayward. Environmental factors can never be totally eliminated; as Hayward points out, "We can’t prepare a medicine against cosmic rays." The prospects for cure, though still distant, are brighter. "First, we need to understand how the normal cell controls itself. Second, we have to determine whether there are a limited number of genes in cells, which are always responsible for at least part of the trouble. If we can understand how cancer works, we can counteract its action.\ This passage is probably taken from ______.
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Britain’s inability to keep pace with the steady development of technology, coupled with lack of attention to marketing needs, is the reason for our national decline.
某电脑专卖店2002年1～12月电脑销售量如表3-1所列。 表3-1 某电脑专卖店2002年电脑销售量表 时间 序号(t) 实际销售量xi/台 时间 序号(t) 实际销售量xi/台 2002.1 1 60 2002.7 7 48 2002.2 2 53 2002.8 8 65 2002.3 3 44 2002.9 9 69 2002.4 4 30 2002.10 10 52 2002.5 5 56 2002.11 11 46 2002.6 6 54 2002.12 12 72 【问题】
The medical world is gradually realizing that the quality of the environment in hospitals may play a significant role in the process of recovery from illness. As part of a nation-wide effort in Britain to bring art out the galleries and into public places, some of the country’s most talented artists have called in to transform older hospitals and to soften the hard edges of modern buildings. Of the 2 500 National health Service hospitals in Britain, almost 100 now have significant collections of contemporary art in corridors, waiting areas and treatment rooms. These recent initiatives owe a great deal to one artist, Peter Senior, who set up his studio at a Manchester hospital in north-eastern England. The quality of the environment may reduce the need for expensive drugs when a patient is recovering form an illness. A study has shown that patients who had a view on to a garden needed half the number of strong pain killers compared with patients who had no view at all or only a brick wall to look at during the early 1970s. he felt the artist had lost his place in modern society, and that art should be enjoyed by a wider audience. A typical hospital waiting room might have as many as 5 000 visitors each week. What better place to hold regular exhibitions of art Senior held the first exhibition of his own paintings in the out-patients’ waiting area of the Manchester royal Infirmary in 1975. Believed to be Britain’s first hospital-artist, Senior was so much in demand that he was soon joined by a team of six young art school graduates. The effect is striking. Instead of the familiar long, barren corridors and dull waiting rooms, the visitors experience a full view of fresh colours, playful images and restful courtyards. Peter Senior is ______.
"I have great confidence that by the end of the decade we’ll know in vast detail how cancer cells arise," says microbiologist Robert Weinberg, an expert on cancer, "But," he cautions, "some people have the idea that once one understands the causes, the cure will rapidly follow. Consider Pasteur. He discovered the causes of many kinds of infections, but it was fifty or sixty years before cures were available." This year, 50 percent of the 910 000 people who suffer from cancer will survive at least five years. In the year 2000, the National Cancer Institute estimates, that figure will be 75 percent. For some skin cancers, the five-year survival rate is as high as 90 percent. But other survival statistic(统计)rate still discouraging-13 percent for lung cancer, and 2 percent for cancer of the pancreas(胰腺). With as many as 120 varieties in existence, discovering how cancer works is not easy. The researchers made great progress in the early 1970s, when they discovered that oncogenes, which are cancer-causing genes(基因), are inactive in normal ceils. Anything from cosmic rays to radiation to diet may activate a dormant oncogene, but how remains unknown. If several oncogenes are driven into action, the cell, unable to turn them off, becomes cancerous. The exact mechanisms involved are still mysterious, but the likelihood that many cancers are initiated at the level of genes suggest that we will never prevent all cancers. "Changes are a normal part of the evolutionary process," says oneologist William Hayward. Environmental factors can never be totally eliminated; as Hayward points out, "We can’t prepare a medicine against cosmic rays." The prospects for cure, though still distant, are brighter. "First, we need to understand how the normal cell controls itself. Second, we have to determine whether there are a limited number of genes in cells, which are always responsible for at least part of the trouble. If we can understand how cancer works, we can counteract its action.\ Which of the following statements is true.
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