题目内容
在数据库系统中，由数据库管理系统实现对数据的统一控制和管理。
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关系的结构，可以用关系模式来表示。
在将E-R图转换到关系模型时，实体和联系都可以表示成关系。
“ What is the role of Yan Zhitui’s 1 in China today?”, one might wonder.Some might say that family life and society have changed in so many ways that any advice given a long time ago would be irrelevant or even 2in today’s world. For example, in the past and until very recently, the elder members of the family used to be the source of all 3 and make all the decisions on behalf of the family. But today, relationships within the family have become more 4 . Most parents no longer expect their children to 5 them without question. For example, most fathers no longer arrange their children's marriages or choose their careers. Women have also taken a 6 role. They used to stay at home to take care of the family, including both the children and the grandparents, whereas today they usually have their own careers. Furthermore, while sons in the past were considered to be more important, girls today are 7 valued. Many young 8 how share the shopping, housework, cooking, and, although such attitudes are more common in the cities than in the.There have been changes in family life and society in China, but some traditions still remain. For example, Chinese parents today, although 9 and relaxed, are still quite and expect a good deal of respect from their children. So perhaps a better question would be: “ Is the Chinese family in decline or is it merely undergoing some changes?” There is greater emphasis on personal choice and freedom, more equality of the sexes, and it may be argued that there is an even stronger 10 bond between parents and children than there used to be.
Confucius thoughts on 1 and humanity still appeal to many people, not just to the Chinese. Heaven is the 2 of everything; it is life creating and as such is 3 from life itself. Under this philosophy, the ancient Chinese learnt to be in awe of heaven and to 4 nature.Non-action means to follow nature’s rules; by doing nothing we can, in fact, do everything. Wu wei's 5 is that, " when nothing is done, nothing is left undone" , and as a natural course and principle of governance, " the world is ruled by letting things take their course; it cannot be ruled by 6 " . To achieve this 7 with life, we must be calm and observant and learn to pay attention to ourselves and to nature.The Art of War gives ideas about acquiring 8 advantages over your opponents, which can often prevent going to war. These ideas have found an application in the business world, where we often find expressions like ' know your enemy' and " the best defense is a good 9 " . Many companies make reading the book a must for their leaders to help them learn how to thrive in a highly competitive market. For example, Sun Tzu says that tactics can be expected and unexpected, but that the unexpected is much harder to defend; this is understood in business as 10 -- the most powerful weapon.
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