单选题RUP是一个二维的软件开发模型，其核心特点之一是______。RUP将软件开发生存周期划分为多个循环(Cycle)，每个循环由4个连续的阶段组成，每个阶段完成确定的任务。设计及确定系统的体系结构，制定工作计划及资源要求是在______阶段完成的。
单选题关于数据库中关系性质的描述，错误的是 (40) 。 A．表中任意两行的值不能相同 B．表中任意两列的值不能相同 C．行在表中的顺序无关 D．列在表中的顺序无关
单选题For each blank, choose the best answer from the four choices and write down on the answer sheet. It is claimed that Al applications have moved from laboratories to the real world. However, conventional von Neumann computers are (66) for Al applications, because they are de- signed mainly for numerical processing. In a larger yon Neumann computer, there is a larger ratio of memory to processing power and consequently it is even less efficient. This (67) remains no matter how fast we make the processor because the length of the computation becomes dominated by the time required to move data between (68) and memory. This is called the yon Neumann (69) . The bigger we build the machines, the worse it gets. The way to solve the problem is to diverse from the traditional architectures and to design special ones for Al applications. In the research of future Al architectures, we can take advantages of many (70) or currently emerging concepts. in computer architecture, such as dataflow computation, stack machines, tagging, pipelining, systolic array, multiprocessing, distributed processing, database machines, and inference machines.
单选题管道和过滤器模式属于 （30） 。
单选题在计算机的可靠性模型中，N模冗余系统是由N个相同的模块和一个 (18) 组成。 A．缓冲区 B．控制器 C．加速器 D．表决器
单选题关键路径法是多种项目进度分析方法的基础。 (20) 将关键路径法分析的结果应用到项目日程表中； (21) 是关键路径法的延伸，为项目实施过程中引入活动持续期的变化； (22) 允许相互依赖的活动可以部分并行进行。
单选题就知识产权中的财产权而言，具有法定保护期的限制是其一个基本特征，但并非知识产权中每一项财产权都具有时间限制。根据知识产权法的有关规定，正确的说法是 (14) 。
单选题在局部E-R 图合并为总体E-R 图的过程中， （10） 是错误的。
单选题A．简单转移 B．清洗 C．集成 D．聚集和概括
单选题基于网络安全的需要，网络操作系统一般提供了四级安全保密机制：注册安全性、用户信任者权限与 (12) 。 A) 最大信任者权限屏蔽和物理安全性 B) 最大信任者权限屏蔽和目录与文件属性 C) 物理安全性和目录与文件属性 D) 目录与文件属性和协议安全性
单选题中国某企业与某日本公司进行技术合作，合同约定使用1 项日本专利（获得批准并在有效期内），但该项技术未在中国申请专利，依照该专利生产的产品在 (11) 销售，中国企业需要向日本公司支付这项日本专利的许可使用费。
单选题某IT企业计划对一批新招聘的技术人员进行岗前脱产培训，培训内容包括编程和测试两个专业，每个专业要求在基础知识、应用技术和实际训练三个方面都得到提高。根据培训大纲，每周的编程培训可同时获得基础知识3学分、应用技术7学分以及实际训练10学分；每周的测试培训可同时获得基础知识5学分、应用技术2学分以及实际训练7学分。企业要求这次岗前培训至少能完成基础知识70学分，应用技术86学分，实际训练185学分。以上说明如下表所示： 编程(学分/周) 测试(学分/周) 学分最低要求 基础知识 3 5 70 应用技术 7 2 86 实际训练 10 7 185 那么这样的岗前培训至少需要 (56) 周时间才能满足企业的要求。 A．15 B．18 C．20 D．23
单选题云计算是集合了大量计算设备和资源，对用户屏蔽底层差异的分布式处理架构，用户与提供实际服务的计算资源是相分离的。当________时最适用于使用云计算服务。
单选题若进栈序列为1，2，3，4，进栈过程中可以出栈，则下列不可能的一个出栈序列 (32) 。
单选题某数据处理流水线如图所示，若每隔3Δt流入一个数据，连续处理4个数据。此数据处理流水线的实际吞吐率为______。
单选题在进行金融业务系统的网络设计时，应该优先考虑 （70） 原则。
单选题假设磁盘上每个磁道划分成9个物理块，每块存放1个逻辑记录。逻辑记录R0， R1，…，R8存放在同一个磁道上，记录的安排顺序如下表所示。 物理块 0 1 2 3 4 5 6 7 8 逻辑记录 R0 R1 R2 R3 R4 R5 R6 R7 R8 假定磁盘旋转一圈的时间为27ms，磁头当前处在R0的开始处。若系统顺序处理这些记录，使用单缓冲区，每个记录处理时间为3ms，则处理这9个记录的最长时间为 (48) ；若对信息存储进行优化分布后，处理9个记录的最少时间为 (49) 。
单选题在Linux 系统中，一般用 （64） 命令来测试另一台主机是否可达。
单选题In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. With the implementation of (66) , the so - called network has become a reality. The provision of such facilities is the most important part of the network requirements. However, in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of (67) interface between user(application) program, normally referred to, as application processes, and the underlying communication services may be (68) . For example, one computer may be a small single - user computer, while another may be a large (69) system. In the earlier days of computer communication, these issues meant that only closed communities of computers (that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM's Systems Network Architecture (SNA) and DEC's Digital Network Architecture (DNA) are just two examples of communication software packages produced by manufacturers to allow their systems to be interconnected together. These proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. In an attempt to alleviate this problem, (70) , in the late 1970s, formulated a reference model to provide a common basis (or the coordination of standards developments and to allow existing and evolving standards activities to be placed into perspective with one another.