● 设集合A={{a}},B={{a},Φ},则A∩B=___(51)___。
(51)A.{{a}} B.{a} C.Φ D.{{a},Φ}
● 设R(x):x是实数。Q(x):x是有理数。则___(52)___正确地翻译了命题“并非每个实数都是有理数”。
(52)
● 设P={1,2,3},则满足既是对称性,又是反对称性的关系是___(53)___。
(53)A.{<1,1>,<2,3>,<3,3>} B.{<1,1>,<2,1>,<3,2>}
C.{<1,1>,<2,2>,<3,3>} D.{<1,1>,<2,1>,<1,3>}
● 设S=Q×Q,Q为有理数集合,*为S上的二元运算,对于任意的<a,b>,<x,y>∈S,有<a,b>*<x,y>=<ax,ay+b>,则S中关于运算*的单位元为___(54)___。
(54) A.<1,0> B.<0,1> C.<1,1> D.<0,0>
● 设B={P,Q},则B上可以定义___(55)___个等价关系。
(55)A.2 B.3 C.4 D.6
● 某工程计划如下图所示,图中标注了完成任务A-H所需的天数,其中虚线表示虚任务。经评审后发现,任务D还可以缩短3天(即只需7天就能完成),则总工程可以缩短___(56)___天。
(56)A.0 B.1 C.2 D.3
● 多媒体电子出版物创作的主要步骤为___(57)___。
(57)A.应用目标分析、脚本编写、媒体数据准备、设计框架、制作合成、测试
B.应用目标分析、脚本编写、设计框架、媒体数据准备、制作合成、测试
C.应用目标分析、设计框架、脚本编写、媒体数据准备、制作合成、测试
D.应用目标分析、媒体数据准备、脚本编写、设计框架、制作合成、测试
● JPEG压缩编码算法中,___(58)___是错误的。
(58)A.JPEG算法与图像的彩色空间无关
B.对变换后的系数进行量化是一种无损压缩过程
C.量化后的交流系数(AC)使用行程长度编码(RLE)方法
D.量化后的直流系数(DC)使用差分脉冲调制编码(DPCM)方法
●在选择数据压缩算法时需要综合考虑___(59)___。
(59)A.数据质量和存储要求 B.数据的用途和计算要求
C.数据质量、数据量和计算的复杂度 D.数据的质量和计算要求
● ___(60)___图像通过使用彩色查找来获得图像颜色。
(60)A.真彩色 D.伪彩色 C.直接色 D.矢量
● 某IP网络连接如下图所示,在这种配置下IP全局广播分组不能够通过的路径是___(61)___。
(61)A.计算机P和计算机Q之间的路径
B.计算机P和计算机S之间的路径
C.计算机Q和计算机R之间的路径
D.计算机S和计算机T之间的路径
●正确地描述了:RADIUS协议的是:___(62)___。
(62)A.如果需要对用户的访问请求进行提问(Challenge),则网络访问服务器(NAS)对用户密码进行加密;并发送给RADIUS认证服务器
B.网络访问服务器(NAS)与RADIUS认证服务器之间通过UDP数据报交换请求/响应信息
C.在这种C/S协议中,服务器端是网络访问服务器,(NAS),客户端是RADIUS认证服务器
D.通过RADIUS协议可以识别非法的用户,并记录闯入者的日期和时间
● 正确地表现了CSMA/CD和令牌环两种局域网中线路利用率与平均传输延迟的关系的图是___(63)___。
(63)
● 在层次化网络设计方案中,___(64)___是核心层的主要任务。
(64)A.高速数据转发 B.接入Internet
C.工作站接入网络 D.实现网络的访问策略控制
● “<title style="italic">science</title>”是一个XML 元素的定义,其中元素标记的属性值是___(65)___。
(65)A.title B.style C.italic D.science
● SOX is an alternative ___(66)___ for XML. It is useful for reading and creating XML content in a ___(67)___ editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML ___(68)___ have not reached a point where their tree views, tables and forms can completely substitute for the underlying ___(69)___ language. This is not surprising when one
considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses ___(70)___ to represent the structure of an XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.
(66) A. semantic B. pragmatics C. syntax D. grammar
(67) A. graphic B. program C. command D. text
(68) A. texts B. editors C. creators D. tags
(69) A. programming B. command C. markup D. interactive
(70) A. indenting B. structure C. framework D. bracket
● With hundreds of millions of electronic ___(71)___ taking place daily, businesses and organizations have a strong incentive to protect the ___(72)___ of the data exchanged in this manner, and to positively ensure the ___(73)___ of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations, and for deploying strong security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security ___(74)___ that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in ___(75)___ and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.
(71) A.devices B.transactions C.communications D. businesses
(72) A.operation B.completeness C.integrity D. interchange
(73) A. identities B. homogeneities C. creations D. operations
(74) A. appliances B. chips C. tools D. means
(75) A. software B. form C. computer D. silicon
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