【单选题】【消耗次数:1】
当前流行的数据库系统大都采用( )。
树状模型
关系模型
层次模型
网状模型
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相关题目
【简答题】 传统的数据模型分类,数据库系统可以分为三种类型:[填空]、网状数据库模型和关系数据模型。
【判断题】 关系数据库系统是支持关系模型的数据库系统。
①  正确
②  错误
【单选题】 常见的结构数据模型有层次模型、网状模型和( )。
①  联系模型
②  实体模型
③  关系模型
④  概念模型
【单选题】 当前开发信息系统使用的主流数据库模型为()。
①  层次数据库模型
②  网络数据库模型
③  关系数据库模型
④  面向对象数据库模型
【判断题】 ER模型属于数据库的概念模型。
①  正确
②  错误
【单选题】 ER(实体联系模型)模型是数据库的设计工具之一,它一般适用于建立数据库的( )。
①  概念模型
②  逻辑模型
③  内部模型
④  外部模型
【单选题】 ER(实体联系模型)模型是数据库的设计工具之一,它一般适用于建立数据库的( )。
①  A.概念模型
②  B.逻辑模型
③  C.内部模型
④  D.外部模型
【单选题】 在数据库技术中,独立于计算机系统的模型是?
①  面向对象的模型
②  关系模型
③  E-R模型
④  层次模型
【单选题】 在数据库概念设计中,最常用的数据模型是( )。
①  关系模型
②  逻辑模型
③  物理模型
④  实体联系模型
【多选题】 按所使用的数据模型来分,数据库的类型包括?
①  层次模型
②  概念模型
③  关系模型
④  逻辑模型
随机题目
【单选题】 “The Love Song of J. Alfred Prufrock” is T. S. Eliots most striking early achievement. The poem is a sort of ______monologue.
①  private
②  personal
③  dramatic
④  poetic
【单选题】 ______ is Edwin Arlington Robinson’s best character sketch telling the story of the well-educated and rich hero who is admired by the town people but suddenly shot himself on one night.
①  “MiniverCheevy”
②  “Richard Cory”
③  “The House on the Hill”
④  None of the above
【判断题】 Mark Twain, one of the greatest 19th century American writers, is well known for his international theme.
①  正确
②  错误
【判断题】 As a realist, Mark Twain concerned particularly about the local character of a region, which came about as “Local Colorism”.
①  正确
②  错误
【判断题】 The first American writer of local color to achieve wide popularity was Bret Harte.
①  正确
②  错误
【单选题】 The end of ______ marked the beginning of The Gilded Age, an age of excess and extremes, of decline and progress, of poverty and dazzling wealth, of gloom and hope.
①  the American War of Independence
②  World War I
③  World War II
④  The Civil War
【单选题】 In Henry James’ The Portrait of A Lady, the author tries to portray the young woman as an embodiment of ______.
①  the force of convention
②  the free spirit of the New World
③  the decline of aristocracy
④  the corruption of the newly rich
【单选题】 In his masterpiece The Portrait of A Lady, Henry James _________.
①  incarnates the clash between the Old World and the New in the life journey of an American girl in a European cultural environment
②  tells a story about a young and innocent American confronting the complexity of the European life as well as the American society
③  describes a young American girl who gets “killed” by the winter in Rome
④  tells about some Europeans who learn with difficulty to adapt themselves to the American life
【单选题】 At the middle of 19th century, America witnessed a cultural flowering which is called “_____”.
①  the English Renaissance
②  the Second Renaissance
③  the American Renaissance
④  the Salem Renaissance
【单选题】 In Dreiser’s Sister Carrie, which of the following statements is NOT true about the characters in the story?
①  At the end of the story, Hurstwood’sfamily are enjoying a happy life without him.
②  Being unable to make a decent living, Hurstwood at last commits suicide.
③  In spite of her success as a famous actress Carrie does not feel happy.
④  Carrie becomes rich and helps Hurstwood out of his difficulty.