【判断题】关系模型中实体与实体间的联系用关系来表示。()
【单选题】It is comforting to see that ________, we are doing our part for the environment.
【单选题】Everyone of us lives and works on a small part of the earth's surface, moves in a small circle, and of these acquaintances knows only a few intimately. Of any public event that has wide effects we see...
A.
man's life is also insignificant.
B.
man's opinions can not be accurate at all.
C.
human observations in general are all but partial.
D.
man can not have any opinion.
【判断题】由于人们对空气干湿程度的感受与空气中水汽的绝对数量直接相关,所以采用绝对湿度来判断空气的干湿程度。( )
【简答题】Compared with the ______ culture, the suce culture is only a small part of culture.
【简答题】A. 在数据库设计中用关系模型来表示实体和实体之间的联系,关系模型的结构是( )。 B. 层次结构 C. 二维表结构 D. 网状结构
【单选题】Everyone of us lives and works on a small part of the earth's surface, moves in a small circle, and of these acquaintances knows only a few intimately. Of any public event that has wide effects we see...
A.
man's life is also insignificant.
B.
man's opinions can not be accurate at all.
C.
human observations in general are all but partial.
D.
man cannot have any opinion.