单选题以下关于TCP/IP协议的叙述中，说法错误的是{{U}} (66) {{/U}}。

单选题为实现图像信息的压缩，建立了若干种国际标准。其中，既是DVD的标准，也是高清晰度电视(HDTV)的标准是 (14) 。 A．MPEG-1 B．MPEG-2 C．MPEG-4 D．MPEG-7

单选题CIDR路由汇聚后网络地址128.39.128.0/21，不能被其覆盖的子网地址是{{U}} (69) {{/U}}。

单选题下图为一个表达式的语法树，该表达式的后缀形式为()

单选题在面向对象分析过程中，通常用概念模型来详细描述系统的问题域，而用 (39) 来表示概念模型。

单选题下面关于二叉树的叙述，正确的是 （ ） 。

单选题以下关于计算机软件著作权的叙述，错误的是______。 A.软件著作权人可以许可他人行使其软件著作权，并有权获得报酬 B.软件著作权人可以全部或者部分转让其软件著作权，并有权获得报酬 C.软件著作权属于自然人的，该自然人死亡后，在软件著作权的保护期内，软件著作权的继承人可以继承各项软件著作权 D.为了学习和研究软件内含的设计思想和原理，通过安装、显示、传输或存储软件等方式使用软件的，可以不经软件著作权人许可，不向其支付报酬

单选题When you think of the Internet, you probably think of ".com." Just what do those three letters at the end of a World Wide Web address mean? Every computer that hosts data on the Internet has a (71) numerical address. For example, the numerical address for the White House is 198.137.240.100. But since (72) people want to remember long strings of numbers, the (73) was developed. It is a critical part of the Internet's technical infrastructure, correlates a numerical address to a word. To (74) the White House website, you could type its numerical address into the address box of your web browser. But most people prefer to use "www. whitehouse. gov." In this case, the domain name is (75) .

单选题使用（ ）命令可以释放当前主机自动获取的IP地址

单选题一个长度为n的顺序表的表尾插入一个新元素的渐进时间复杂度为 (35) 。

单选题ISO/IEC 9126软件质量模型中第一层定义了6个质量特性，并为各质量特性定义了相应的质量子特性。子特性{{U}} (33) {{/U}}属于可维护性质量特性。

单选题以下关于软件维护的叙述中，不正确的是（ ）

单选题从结构化的瀑布模型看，在软件生命周期中的几个阶段中，下面的几个选项中， (13) 出错对软件的影响最大。

单选题Software quality assurance is now an (71) sub-discipline of software engineering. As Bucldy and Oston point out, (72) software quality assurance is likely to lead to an ultimate (73) of software costs. However, the major hurdle in the path of software management in this area is the lack of (74) software standards. The development of accepted and generally applicable standards should be one of the principal goals of (75) in software engineering.

单选题由a、b构造且仅包含偶数个a的串的集合用正规式表示为______。

单选题软件系统的可靠性，主要表现在 (26) 。

单选题We know a computer is a machine that processes data (stored in main memory) into information, under control of a stored program. We also know that, internally, a computer is a binary machine; thus the data and the program instruictions must be stored in binary form. Characters are represented in (71) . Numbers are stored as binary numbers, with each bit's positional value significant. A computer's main memory is divided into bytes, words or both (depending on the system), and each of these basic storage units is assigned an (72) . Using this address, the processor can read or write selected bytes or words. The processor consists of a clock, an instruction control unit, an arithmetic and logic unit, and registers. Once a program is stored in main memory, the processor can begin to execute it. During (73) , the instruction control unit fetches an instruction from main memory; during (74) , the arithmetic and logic unit executes it. Precisely timed electronic pulses generated by the clock drive this basic (75)

单选题利用逐点插入建立序列(52,43,73,88,76,18,38,61,45,39)对应的二叉排序树之后，查找元素61要进行______次元素间的比较。 A．3 B．4 C．6 D．8