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What did people use to think of Diana's life as a princess
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回顾数据库的应用发展史，有两类数据库，它们是应用数据库和主题数据库。 Ⅰ．减少应用数据库的数量 Ⅱ．减少应用项目开发所需要的资金投入 Ⅲ．加速应用项目的开设 Ⅳ．增加应用项目开发的稳定性 Ⅴ．减少应用项目开发所需要的人员投入 以上关于主题数据库的设计目的描述中，正确的是
信息作为一种资源，其生命周期也可以分为需求、获取、经营管理、分配四个阶段。数据类的识别与信息的生命周期有关。其中与事务类数据有关的阶段是
During recent years we have heard much about "race": how this race does certain things and that race believes certain things and so on. Yet, the (21) phenomenon of race consists of a few surface indications.We judge race usually (22) the coloring of the skin: a white race, a brown race, a yellow race and a black race. But (23) you were to remove the skin you could not (24) anything about the race to which the individual belonged. There is (25) in physical structure, the brain or the internal organs to (26) a difference.There are four types of blood. (27) types are found in every race, and no type is distinct to any race. Human brains are the (28) . No scientists could examine a brain and tell you the race to which the individual belonged. Brains will (29) in size, but this occurs within every race. (30) does size have anything to do with intelligence. The largest brain (31) examined belonged to a person of weak (32) .On the other hand, some of our most distinguished people have had (33) brains.Mental tests which are reasonably (34) show no differences in intelligence between races. High and low test results both can be recorded by different members of any race. (35) equal educational advantages, there will be no difference in average standings, either on account of race or geographical location. Individuals of every race (36) civilization to go backward or forward. Training and education can change the response of a group of people, (37) enable them to behave in a (38) way.The behavior and ideals of people change according to circumstances, but they can always go back or go on to something new (39) is better and higher than anything (40) the past. 30().
A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited period of monopoly and publishes full details of his invention to the public after the period terminates.Only in the most exceptional circumstances is the life-span of a patent extended to alter this normal process of events.The longest extension ever granted was to George Valensi. His 1939 patent for color TV receiver circuitry was extended until 1971 because for most of the patent’s normal life there was no hope of reward for’ the invention.Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even re-patent. Indeed, patent experts often advise anyone wishing to avoid the high cost of conducting a search through live patents that the one sure way of avoiding violation of any other inventor’s right is to plagiarize a dead patent. Likewise, because publication of an idea in any other form permanently invalidates further patents on that idea, it is traditionally safe to take ideas from other areas of print. Much modern technological advance is based on these presumptions of legal security.Anyone closely involved in patents and inventions soon learns that most "new" ideas are, in fact, as old as the hills. It is their reduction to commercial practice, either through necessity or dedication, or through the availability of new technology, that makes news and money. The basic patent for the theory of magnetic recording dates back to 1886. Many of the original ideas behind television originate from the late 18th and early 20th century. Even the Volkswagen rear engine car was anticipated by a 1904 patent for a cart with the horse at the rear. Which of the following is TRUE according to the passage()
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