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______包括类型、取值范围、取值单位的冲突。
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某生产小电器的企业是增值税小规模纳税人，2012年3月发生下列业务：（1）外购材料一批用于生产小电器，取得增值税专用发票，注明价款10000元，增值税1700元；外购一台生产设备，取得增值税专用发票，注明价款30000元，增值税5100元；（2）委托外贸企业进口一批塑料材料，关税完税价格15000元，关税税率6%，支付了相关税费后将材料运回企业，海关填发了进口增值税专用缴款书；（3）销售50件自产A型小电器，取得含税收入12360元；（4）将2件自产A型小电器无偿赠送客户试用；（5）将使用过的一批包装物出售，取得含税收入2472元；（6）将使用过的一台设备出售，原值40000元，含税售价15450元。要求计算：（1）该企业进口塑料材料应缴纳的进口增值税；（2）该企业出售包装物应缴纳的增值税；（3）该企业出售设备应缴纳的增值税；（4）该企业当月应向主管税务机关缴纳的增值税合计数。
The burning of coal is very wasteful of energy. This can be realized when we remember that one pound to coal burned in the furnace of a power station (26) raise enough team to drive a generator (27) will produce enough current to light a one barelectric fire for three hours. On the other hand, if all the energy in the atoms of a pound of coal could be released, (28) should be enough energy to (29) all the machinery in all the factories in Britain for a month. In simpler words, all this means that one pound of any element or compound of element, if completely converted (30) energy by breaking up the atoms, would (31) the same amount of heat (32) the burning of 1,500,000 tons of coal. Scientists have calculated that if a bucket of sand from the beach could be completely (33) into energy, and if the energy so obtained was used to drive electric generators, enough (34) would be produced to supply the whole of Europe for five years. (35) other words, a bucket of sand contains enough energy to (36) a thousand million pounds’ worth of electricity. Albert Einstein was the first man to realize the vast (37) of energy locked in the atom. Einstein was also the first to show in theory how the energy of the atom might be released. Indeed without Einstein’s theory (38) was the result of many complicated mathematical calculations, there would never have been any practical (39) of nuclear power. In 1905, which was many years before other scientists really understood a great deal about atomic energy, Einstein declared that if you "destroyed" a given mass of matter, you would obtain (40) its place an enormous amount of energy. (41) support this theory, Einstein worked (42) what is probably the most important equation in the history of mathematics. It was (43) no means a complicated equation, but in fact a very simple (44) . Here it is: E=MC2. Turned into simple language, Einstein’s equation means that energy(E) is equal (45) mass(M) multiplied by the speed of light(C) squared(C2).
______是专门用来进行数据检索，以及便于以后进行数据加工的一种重要的数据库对象。
Thanksgiving Day is the most truly American of the national holidays in the United States and is most closely connected with the earliest history of the country. In 1620, the settlers, or Pilgrims, sailed to America on the May Flower, seeking a place where they could have freedom of worship. After a two-month voyage, in icy November, they landed at what is now Plymouth, Massachusetts. During their first winter, over half of the settlers died of starvation or epidemics (流行病). Those who survived began sowing in the first spring. All summer long they waited for the harvests with great anxiety, knowing that their lives and the future of the colony depended on the coming harvest. Finally the fields produced a yield rich beyond expectations. And therefore it was decided that a day of thanksgiving to the Lord be fixed. Years later, President of the United States declared the fourth Thursday of November as Thanksgiving Day every year. The celebration of Thanksgiving Day has been observed on that date until today. The pattern of the Thanksgiving celebration has never changed through the years. The big family dinner is planned months ahead. On the dinner table, people will find apples, oranges, chestnuts, walnuts and grapes. There will be plum pudding, mince pie, other varieties of food and cranberry juice and squash. The best and most attractive among them are roast turkey and pumpkin pie. They have been the most traditional and favorite food on Thanksgiving Day throughout the years. What is the meaning of ’observe’ in the fourth paragraph
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