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(二)某外商投资企业自挪威购进钢铁制法兰。2009年2月4日货物运抵首都机场，向首都机场海关申请转关运输，于2月6日货物转运至指运地天津塘沽并于当日向海关申报。进口申报前，该公司已经海关核准以保函形式向海关提供担保。进口报关单“征免性质”栏填报为“自有资金”，“备案号”栏暂空。6月18日，企业向海关办理担保销案手续。企业根据海关通知修改报关单，将“备案号”栏修改为“Z02020902015”。根据上述案例，解答下列各题。 该公司向海关提供担保，是因为（）。
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Like fine food, good writing is something we approach with pleasure and enjoy from the first taste to the last._______(46) Quite the contrary, just as the cook has to undergo an intensive training, mastering the skills of his trade, the writer must sit at his desk and devote long hours to achieving a style in his writing, whatever its purpose-school work, matters of business, or purely social communication.___________(47) There are still some remote places in the world where you might find someone to do your business or social writing for you, for a fee. There are a few mangers who are lucky enough to have the service of that rare kind of secretary who can take care of all sorts of letter writing with no more than a quick note to work from._____________(48) We have to write school papers, business papers or home papers. We are constantly called on to put words to paper. It would be difficult to count the number of such words, messages, letters, and reports put to the mails or delivered by hand, but the daily figure must be enormous.__________(49) We want to arouse and hold the interest of readers. We want whatever we write to be read, from first word to last, not thrown into some "letters-to-be-read" file or into a wastepaper basket._____________(50) A But for most of us, if there is any writing to be done, we have to do it ourselves. B However, the managers may sometimes cause the writers a lot of trouble. C Any good writers, like good cooks, do not suddenly appear full-blown(成熟的) D What is more, everyone who writes expects, or at least hopes, that his writing will be read. E This is the reason we bend our efforts toward learning and practicing the skills of interesting, effective writing. F You may be sure that the greater the effort, the more effective the writing, and the more rewarding. 50（）
Keeping Cut Flowers 1.While everybody enjoys fresh cut flowers around his house, few people know how to keep them for as long as possible. This may be done by keeping in mind a few simple facts.2.An important thing to remember about cut flowers is that they are sensitive to temperature. For example, studies have shown that cut carnations(康乃馨) retain their freshness eight times longer when kept at 12oC than when kept at 260c. Keeping freshly harvested flowers at the right temperatures is probably the most important aspect of flower care.3.Flowers are not intended by nature to live very long. Their biological purpose is simply to attract birds or insects, such as bees, for pollination (授粉). After that, they quickly dry up and die. The process by which flowers consume oxygen and produce carbon dioxide (二氧化碳), called respiration (呼吸), generates the energy the flower needs to give the flower its shape and colour. The making of seeds also depends on this energy. While all living things respire, flowers have a high level of respiration. A result of all this respiration is heat, and for flowers the level of heat relative to the mass of the flower is very high. Respiration also brings about the eventual death of the flower. Thus the greater the level of respiration, the sooner the flower dies.4.How, then, to control the rate at which flowers die By controlling respiration. How is respiration controlled By controlling temperature. We know that respiration produces heat, but the reverse is also true. Thus by maintaining low temperatures, respiration is reduced and the cut flower will age more slowly.5.Another vital factor in keeping cut flowers is the quality of the water in which they are placed. Flowers find it difficult to “drink” water that is dirty or otherwise polluted. Even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flowers. To rid the water of these unwanted substances, household chlorine bleach (含氯漂白剂) can be used in small quantities. It is recommended that 15 drops of chlorine bleach(at 4% solution) be added to each litre of water. The water and solution should also be replaced each day. Respiration plays a key role（）
报关员在一个记分周期内变更报关单位的，已记分分值在该记分周期内予以消除。（）
D/P属于跟单托收方式。（）
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