单选题职工实体中有职工号、姓名、部门、参加工作时间、工作年限等属性,其中,工作年限是一个
________
属性。
单选题在OODB中,对象标识符具有______。
单选题假设学生关系是S(S#,SNAME,SEX,AGE),课程关系是C(C#,CNAME, TEACHER),学生选课关系是SC(S#,C#,GRADE)。那么,要查找选修“DB”课程的“女”学生姓名,将涉及到关系______。
单选题Many word processing programs include spell checker. It checks the spelling of every word in a (120) by looking up each word in its dictionary. If the word does not appear in the dictionary the user is (121) to possible misspelling and possible corrections are often (122) . Spell checker does not recognize unusual people names or specialized terms, but it will often allow you to create your own personal dictionary of specialized words you often use. Spell checker is a valuable aid to proofreading, but it can not catch the (123) of one correctly spelled word for another (such as form for from). Thus it does not (124) a document is free of spelling errors.
单选题设关系模式R(ABCDE)上的函数依赖集F=A→BC,BCD→E,B→D,A→D,E→A,将R分解成两个关系模式:R1=(ABD),R2=(ACE),则R1和R2的最高范式分别是 (3) 。
单选题ERP的中文全称是
15
。ERP设计的总体思路即把握一个中心、两类业务、 3条干线,其中3条干线中不包含
16
。
17
和
18
贯穿了ERP系统的整个过程。
单选题One of the guidelines in writing the C code for a software tool is as follows: write code that is as clear and as simple a (76) . The C language can be difficult to read if you combine all (77) features in a single statement. Break complicated (78) into several easy to understand statements for the (79) of readability. This style helps to make your programs more (80) and error-free.
单选题 7
在实现阶段进行,它所依据的模块功能描述和内部细节以及测试方案应在
8
阶段完成,目的是发现编程错误。
9
所依据的模块说明书和测试方案应在
10
阶段完成,它能发现设计错误。
11
应在模拟的环境中进行强度测试的基础上进行,测试计划应在软件需求分析阶段完成。
单选题路由器(Router)是用于连接逻辑上分开的______网络。
单选题CMM模型将软件过程的成熟度分为5个等级。在______使用定量分析来不断地改进和管理软件过程。
单选题ERP的中文全称是 (1) 。ERP设计的总体思路即把握一个中心、两类业务、 3条干线,其中3条干线中不包含 (2) 。 (3) 和 (4) 贯穿了ERP系统的整个过程。
单选题
3.在多媒体的音频处理中,由于人所敏感的音频最高为{{U}} (1)
{{/U}}赫兹(Hz),因此,数字音频文件中对音频的采样频率为{{U}} (2)
{{/U}}赫兹(Hz)。对于一个双声道的立体声,保持一秒钟的声音,其波形文件所需的字节数为{{U}} (3)
{{/U}},这里假设每个采样点的量化位数为8位。
单选题The most accurate and most boring way to (105) Java is that it is a new computer programming language developed by Sun Microsystems that creates (106) independent programs that can be distributed and nm remotely. To run Java programs, a computer must have a Java interpreter. Currently (107) Java programs are small "applets" that are (107) as part of web pages. When you use a Java (108) browser to view a Web page that includes a Java applet, the browser loads the applet onto your computer through your modem or network. Then the Java interpreter runs the applet, which could include animation or sound, on your computer rather than transmitting the code bit by bit over Internet. A few thousand bytes of Java code can tam into a powerful program on your computer. So an applet could include (109) with Java interpreter.
单选题在彩色喷墨打印机中,将油墨进行混合后得到的颜色称为
________
色。
单选题RAD是一种经济的磁盘冗余阵列,它采用 (17) 和 (18) 以提高数据传输率。 RAD与主机连接较普遍使用的工业标准接口为 (19) 。
单选题设有关系模式R(A,B,C,D),F是R上成立的FD集,F=AB→C,D→A,则R的关键码为______。 A.AB B.AD C.BC D.BD
单选题MPC(Multimedia PC)与PC的主要区别是增加了 (9) 。
单选题使用软件开发工具有助于提高软件的开发、维护和管理的效率。集成型软件开发环境通常由工具集和环境集成机制组成。这种环境应具有 (98) 。环境集成机制主要有数据集成机制、控制集成机制和界面集成机制。 A.开放性和可剪裁性 B.开放性和不可剪裁性 C.封闭性和可剪裁性 D.封闭性和不可剪裁性
单选题软件测试的目的是 (53) 。为了提高测试的效率,应该 (54) 。使用白盒测试方法时,确定测试数据应根据 (55) 和指定的覆盖标准。一般说来与设计测试数据无关的文档是 (56) 。软件的集成测试工作最好由 (57) 承担,以提高集成测试的效果。
单选题以下哪些方法可做为计算机系统安全防病毒的技术
________
。
①计账
②身份验证
③密钥分离
④实时防治病毒
⑤防火墙安全技术
