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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. 26().
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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. The passage is mainly about ().
The writer is critical of______.
需求是指用户要求软件系统必须满足的所有功能和限制。以下要素 Ⅰ．功能要求 Ⅱ．性能要求 Ⅲ．可靠性要求 Ⅳ．安全保密性要求 Ⅴ．开发费用和开发周期、可使用资源等方面的限制 哪个(些)方面内容是需求的基本要求
BSP的经验说明，开始进行脚研究必须要首先得到下列哪些人员参与研究的承诺
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