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公共关系公众

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正确答案:

公共关系公众与一般社会公众的概念有所区别,是指与特定的公共关系主体相互联系、相互作用的个人、群体或组织的总和,是公共关系传播、沟通对象的总称。

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A friend of mine was fond of drawing horse. He drew the horses very well,but he always began the tail. Now it is the Western rule to begin at the head of the horse, that is why I was surprised. It struck me that it could not really make any difference whether the artist begins at the head or the tail or the belly(肚子) or the foot of the horse, if he really knows his business. And most great artists who really know their business do not follow other people’s rule.They make their own rules. Every one of them does his work in a way peculiar(奇特的) to himself; and the peculiarity means only that he finds it more easy to work in that way. Now the very same thing is true to literature(文学). And the question, "How shall I begin?" only means that you want to begin at the head instead of beginning at the tail or somewhere else. That is, you are not yet experienced(有经验的) enough to trust to your own powers. When you become more experienced you will never ask the question, and I think that you will often begin at the tail --that is to say, you will write the end of the story before you have even thought of the beginning. 1. A friend of the writer’s drew the horses ____. A. very well B. in the way of western rule C. in the way of his own rule D. all of the above 2. The writer was surprised because ____. A. the artist began to draw at the head of the horse B. the artist began to draw at the tail of the horse C. the artist made his own rule D. the artist did not follow other people’s rule 3. You are not yet experienced because ____. A. you don’t know where to begin B. you want to begin at the head instead of beginning at the tail C. you always asked question D. you do not trust to your own powers 4. When you become more experienced you will ____. A. never ask question B. often begin at the tail C. should write the end of the story D. should think of the beginning 5. The topic of the passage is ______. A. How to draw a horse B. How to write a story C. How to make your own rules D. Trust to your own powers
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Don't wash those fossils! Standard museum practice can wash away DNA. 1.Washing, brushing and varnishing fossils — all standard conservation treatments used by many fossil hunters and museum curators alike — vastly reduces the chances of recovering ancient DNA. 2.Instead, excavators should be handling at least some of their bounty with gloves, and freezing samples as they are found, dirt and all, concludes a paper in the Proceedings of the National Academy of Sciences today. 3.Although many palaeontologists know anecdotally that this is the best way to up the odds of extracting good DNA, Eva-Maria Geigl of the Jacques Monod Institute in Paris, France, and her colleagues have now shown just how important conservation practices can be.This information, they say, needs to be hammered home among the people who are actually out in the field digging up bones. 4.Geigl and her colleagues looked at 3,200-year-old fossil bones belonging to a single individual of an extinct cattle species, called an aurochs.The fossils were dug up at a site in France at two different times — either in 1947, and stored in a museum collection, or in 2004, and conserved in sterile conditions at -20 oC. 5.The team's attempts to extract DNA from the 1947 bones all failed.The newly excavated fossils, however, all yielded DNA. 6.Because the bones had been buried for the same amount of time, and in the same conditions, the conservation method had to be to blame says Geigl."As much DNA was degraded in these 57 years as in the 3,200 years before," she says. Wash in, wash out 7.Because many palaeontologists base their work on the shape of fossils alone, their methods of conservation are not designed to preserve DNA, Geigl explains. 8.The biggest problem is how they are cleaned.Fossils are often washed together on-site in a large bath, which can allow water — and contaminants in the form of contemporary DNA — to permeate into the porous bones."Not only is the authentic DNA getting washed out, but contamination is getting washed in," says Geigl. 9.Most ancient DNA specialists know this already, says Hendrik Poinar, an evolutionary geneticist at McMaster University in Ontario, Canada.But that doesn't mean that best practice has become widespread among those who actually find the fossils. 10.Getting hold of fossils that have been preserved with their DNA in mind relies on close relationships between lab-based geneticists and the excavators, says palaeogeneticist Svante P bo of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany.And that only occurs in exceptional cases, he says. 11.P bo's team, which has been sequencing Neanderthal DNA, continually faces these problems."When you want to study ancient human and Neanderthal remains, there's a big issue of contamination with contemporary human DNA," he says. 12.This doesn't mean that all museum specimens are fatally flawed, notes P bo.The Neanderthal fossils that were recently sequenced in his own lab, for example, had been part of a museum collection treated in the traditional way.But P bo is keen to see samples of fossils from every major find preserved in line with Geigl's recommendations — just in case. Warm and wet 13.Geigl herself believes that, with cooperation between bench and field researchers, preserving fossils properly could open up avenues of discovery that have long been assumed closed. 14.Much human cultural development took place in temperate regions.DNA does not survive well in warm environments in the first place, and can vanish when fossils are washed and treated.For this reason, Geigl says, most ancient DNA studies have been done on permafrost samples, such as the woolly mammoth, or on remains sheltered from the elements in cold caves — including cave bear and Neanderthal fossils. 15.Better conservation methods, and a focus on fresh fossils, could boost DNA extraction from more delicate specimens, says Geigl.And that could shed more light on the story of human evolution. (640 words nature ) Glossary Palaeontologists 古生物学家 Aurochs 欧洲野牛 Neanderthal (人类学)尼安德特人,旧石器时代的古人类。 Permafrost (地理)永冻层 Questions 1-6 Answer the following questions by using NO MORE THAN THREE WORDS for each answer. 1.How did people traditionally treat fossils? 2.What suggestions do Geigl and her colleagues give on what should be done when fossils are found? 3.What problems may be posed if fossil bones are washed on-site? Name ONE. 4.What characteristic do fossil bones have to make them susceptible to be contaminated with contemporary DNA when they are washed? 5.What could be better understood when conservation treatments are improved? 6.The passage mentioned several animal species studied by researchers.How many of them are mentioned? Questions 7-11 Do the following statements agree with the information given in the passage? Please write TRUE if the statement agrees with the writer FALSE if the statement does not agree with the writer NOT GIVEN if there is no information about this in the passage. 7.In their paper published in the Proceedings of the National Academy of Sciences,Geigl and her colleagues have shown what conservation practices should be followed to preserve ancient DNA. 8.The fossil bones that Geigl and her colleagues studied are all from the same aurochs. 9.Geneticists don't have to work on site. 10.Only newly excavated fossil bones using new conservation methods suggested by Geigl and her colleagues contain ancient DNA. 11.Paabo is still worried about the potential problems caused by treatments of fossils in traditional way. Questions 12-13 Complete the following the statements by choosing letter A-D for each answer. 12.“This information” in paragraph 3 indicates: [A] It is critical to follow proper practices in preserving ancient DNA. 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