题目内容
某建设项目的行业标准投资回收期丁为5年，该项目通常投资额为1100万元，年生产成本为 1150万元。为此该项目拟定了A、B、C三个设计方案，有关情况见表3-5。 表3-5 资料数据表 单位：万元 A B C 投资额 1000 1100 1400 生产成本 1200 1150 1050 质量水平 一般 一般 高于一般 年纯收入 一般 一般 高于一般 技术水平 中等 中等偏上 先进 经专家组商定的经济评价指标体系、指标权重、指标分等及其标准分列于表3-6。 表3-6 多因素评分优选法评分表 评价指标 权重 指标分等 标准分 方案与评分 A B C 投资额 0.25 1．低于一般水平 2．一般水平 3．高于一般水平 90 70 60 年生产成本 0.25 1．低于一般水平 2．一般水平 3．高于一般水平 90 70 60 质量水平 0.20 1．一般水平 2．高于一般水平 70 80 年纯收入 0.20 1．一般水平 2．高于一般水平 70 80 技术水平 0.10 1．中等水平 2．中等偏上 3．先进水平 60 70 90 【问题】
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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.\ According to Robert Weinberg, which of the following is true
Proper street behavior in the United States re quires a nice balance of attention and inattention. You are supposed to look at a (62) just enough to show that you are (63) of his presence. If you look too little, you appear proud, (64) much and you are curious. Usually what happens is that people (65) each other until they are about eight feet (66) , at which point both east down their eyes. Sociologist Erring Goffman (67) this as "a kind of dimming of lights."Much of eye behavior is so (68) that we react to it only on the intuitive level. The next time you have a (69) with someone who makes you feel liked, notice what he does with his eyes. (70) are he looks at you more often than is usual with (71) a little longer than the normal. You interpret this as a sign—a polite one— (72) he is interested in you as a person (73) than just in the topic of conversation. Probably you also feel that he is both (74) and sincere.All this has been demonstrated in elaborate (75) . Subjects sit and talk in the psychologist’s laboratory, (76) of the fact that their eye behavior is being (77) from. a one-way vision screen. In one fairly typical experiment, (78) were induced to cheat while performing a task, then were (79) and observed. It was found that those who had (80) met the inter viewer’s eyes less often than was (81) , an indication that "shifty eyes"—to use the mystery writers’ stock phrase—can actually be a tip-off to an attempt to deceive or to feelings of guilt. 70（）
"Much of the sickness and death attributed to the major communicable diseases is in fact caused by malnutrition which makes the body less able to withstand infections when they strike," said Dr Hiroshi Nakajima, Director-General of the World Health Organization (WHO). "At the same time," he added, "in developing countries today, malnutrition is the cause of 174 million children under five years of age being (51) , and 230 million being stunted(阻碍)in their growth. Such (52) represent deprivation, suffering and wasted human potential (53) a scale that is unacceptable from every point of view. Whether we think in (54) of humanitarian concern, common justice or development needs, they demand a (55) , both from national governments and from the international community." It is now (56) that 6.6 million out of the estimated 12.2 million deaths (57) among children under-five--or 54% of young child mortality in developing countries-is associated with malnutrition, In some (58) , such as sub-Saha-ran Africa and south Asia, stagnation(停滞)of nutritional improvement (59) with a rapid rise in population has resulted in an (60) increase in the total number of malnourished children. (61) , over two-thirds of the world’s malnourished children live in Asia (especially south Asia), followed by Africa and Latin America. As Dr Nakajima noted, "The globalization of industry, trade, travel and communication has brought (62) it unprecedented possibilities for mutual cooperation in (63) hunger and malnutrition. At the same time, however, the acceptability of certain foods, and the cultural aspects of their production, distribution and preparation, are now recognized as (64) in the promotion of good nutrition. Without the attention (65) them, little progress can be made towards household food security, appropriate diets, the control of micronutrient(微量元素)deficiencies, the promotion of breast-feeding, and other strategies listed in the Plan of Action adopted in 1992 (at the International Conference on Nutrition in Rome).\
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