名词解释题
超结构
发布日期：2020-12-11
试题解析
超结构嵌入存在定理
超结构嵌入存在定理断言：存在满足转换原理的超结构嵌入∗：V(R)→V(*R)。
- 中文名
- 超结构嵌入存在定理
- 适用范围
- 数理科学
- 外文名
- existence theorem forsuperstructure embeddings
标准全域
标准全域（standard universe）亦称超结构，是一个包括力十分强的标准模型。
- 中文名
- 标准全域
- 适用范围
- 数理科学
- 外文名
- standard universe
超结构
超结构（superstructure）在某些合金“固溶体”中，当缓慢冷却达到一定温度时，原来呈无序分布的溶质原子将变为有序分布，即占据溶剂晶体点阵中一定的位置。这种固溶体称为有序固溶体，其所形成的晶体点阵称为超结构。随着超结构的形成，合金的性能发生突变，如硬度增高而电阻、塑性降低等。
- 中文名
- 超结构
- 别名
- 超点阵
- 特点
- 理想状态下的完全有序
- 外文名
- superstructure
- 性质
- 有序固溶体结构的通称
- 学科
- 结晶学
标签： 结构
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Passage 4Questions 34 - 45 ● Read the article below about stock exchange. ● In most of the lines 34 - 45 there is one extra word. It is either grammatically incorrect or does not fit in with the sense of the text. Some lines, however, are correct. ● If a line is correct, write CORRECT on your Answer Sheet. ● If there is an extra word in the line, write the extra word in CAPITAL LETTERS on your Answer Sheet. ● The exercise begins with two examples, (0) and (00) 0. The London Stock Exchange has always been famous as a place for men only, and women 00. used to be strictly forbidden to enter in. But the world is changing day by day, and even the 34. Stock Exchange, which seemed to be a man’s castle, is being gradually opening its doors to the 35. other sex. On 16th November 1971, a great decision was taken out. The Stock Exchange 36. Council (the body of men that administers the Stock Exchange) decided that women be 37. allowed to the new trading floor when it opened in 1973. But the “castle” had not been very 38. completely conquered. The first girls to work in “The House” were not brokers or jobbers. 39. They were neither allowed to be become partners in stocking firms, nor to be authorized dealers 40. in stocks and shares. They were simply junior clerks and telephone operators. Women all 41. have been trying to get into the Stock Exchange for many years. Several votes have been 42. taken in “The House” to see whether the members would be willing to allow many women 43. to become members, but the answer has always been “No”. There have been three refusals of 44. this kind since 1967. Now women are admitted, although they in a very junior capacity. 45. Actually, it is the only a matter of time, it will sure take place sooner or later.
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