【单选题】设有关系R和S,关系代数表达式为R-(R-S)表示的是( )。
【简答题】An e-book, also known as an electronic book, is an electronic version of a print book that you can download and read. What you need in order to read an e-book is an E-book Reader, which is a kind of 1...
【单选题】指标预测法的工作步骤有五步:①研究分析历史经济形势波动的主要原因和特点;②关注指标变化;③预测近期内经济形式或市场行情运行可能发生的重大变化;④设计经济指标体系(或给出预警界限);⑤采取相应对策。其顺序是( )。
【简答题】An e-book, also known as an electronic book, is an electronic version of a print book that you can download and read. What you need in order to read an e-book is an E-book Reader, which is a kind of 1...
【简答题】An e-book, also known as an electronic book, is an electronic version of a print book that you can download and read. What you need in order to read an e-book is an e-book reader, which is a kind of f...
【简答题】打开考生文件夹下的文件WordA.doc,完成以下操作: (1)将标题字体设置为“华文行楷”,字形设置为“常规”,字号设置为“小初”、选定“效果”为“空心字”,且居中显示。 (2)将“--陶渊明”的字体设臵为“隶书”、字号设置为“小三”,将文字右对齐,加双曲线边框(应用范围为文字),线型宽度应用系统默认值显示。 (3)将正文行距设置为固定值25磅。 完成以上操作后,将该文档以原文件名保存在考生文件...
【单选题】设有关系R和s,关系代数表达式为R-(R-S)表示的是
【单选题】An e-book, also known as an electronic( 电子的 )book, is an electronic version( 版本 )of a print book that you can download( 下载 )and read. What you need in order to read an e-book is an E-book Reader, whic...
A.
can be read by any reader who has a computer
B.
should be read with the help of a special kind of software
C.
is a print form of a book often found in libraries
D.
can be downloaded by turning on the computer