单选题针对分布式事务，要求提供参与者状态的协议是 （60） 。

单选题按文件的逻辑结构，我们可以将文件分为有结构文件和无结构文件。一般源程序和可执行文件采用的分别是 (5) 。

单选题 软件能力成熟度模型CMM描述和分析了软件过程能力的发展与改进的程度，确立了一个软件过程成熟程度的分级标准。在初始级，软件过程定义几乎处于无章可循的状态，软件产品的成功往往依赖于个人的努力和机遇。 在______，已建立了基本的管理过程，可对成本、进度和功能特性进行跟踪。在______，用于软件管理与工程两方面的软件过程均已文档化、标准化，并形成了整个软件组织的标准软件过程。在已管理级，对软件过程和产品质量有详细的试题标准。 在______，通过对来自过程、新概念和新技术等方面的各种有用信息的定量分析，能够不断地、持续地对过程进行改进。

单选题下图为公钥加密系统的概念图，a和b处分别应为______。

单选题对下面图(a)所示系统，仅当部件1，部件2和部件3全部正常工作时系统才能正常工作。图中数字为各部件的可靠性，整个系统的可靠性近似为(9)。如果将部件2和部件3改成由两个器件构成，如图(B)所示，只要器件a和b中有一个正常就能使部件1正常工作，只要器件c和d中有一个正常就能使部件3正常工作。图中数字是各器件可靠性，则部件2的可靠性是(10)，整个系统的可靠性近似为(11)。

单选题One of the functions of the ______ is to store the applications progrms {or the various secondaries. The ______ may have similar or dissimilar functions. The same control code received from two different secondaries may warrant two different actions on the part of the host computer. If the system so requires, the host computer must also provide ______ for the centralized data and the software for database management. Data information is normally stored in auxiliary memories to which the computer has ready access. The ______ peripherals connected to the host computer allow for human entry and intervention. As needs change, application programs may require additions, deletions, or changes. Data link problems also arise which are ______ the range of the computer"s programmed capabilities. In such cases, human entry is required to make the necessary changes to resolve the existing problems.

单选题求最短路径的FLOYD算法的时间复杂度为 ________ 。

单选题下图表示(14)运算过程中的进程流图，其中Pi(i=1，2，3，4，5)表进程。

单选题某超市的商品（商品号，商品名称，生产商，单价）和仓库（仓库号，地址，电话，商品号，库存量）两个基本关系如表1和表2所示。 a. 仓库关系的主键是 （37） ，该关系没有达到第三范式的原因是（38） ； b. 查询联想生产的激光打印机的总库存量的SQL语句如下： SELECT 商品名称，（39） FROM 商品，仓库 WHERE （40）AND（41） ； c. 若仓库关系的地址不能为空，请将下述仓库关系SQL语句的空缺部分补充完整。CREATE TABLE 仓库（仓库号CHAR(2)， 地址 CHAR(20)（42） ， 电话 CHAR(20)， 商品号 CHAR(5)， 库存量NUMERIC(5)， （43） ， （44））；

单选题系统为了管理文件，设置了专门的数据结构----文件控制块(FCB) 。FCB是在执行下列 (18) 系统调用时建立的?

单选题某软件项目的活动图如图所示。图中顶点表示项目里程碑，连接顶点的边表示包含的活动，则里程碑______在关键路径上，活动FG的松弛时间为______。

单选题若某k叉树含有N个节点，则其可能的最小深度是________。

单选题 《中华人民共和国著作权法》中对公民作品的修改权的保护期限是______。未经软件著作权人或其合法授让者的同意，复制或部分复制其软件作品，此种行为侵犯了著作权人或其合法授让者的使用权中的______。

单选题若某二叉树的中序序列为HDIBEJAFCG，后序序列为HIDJEBFGCA。则该树为(22)。

单选题 (56) 中的属性不依赖于其它非主属性。

单选题 Typically, these are concern with the establishment of ______ the network and with the control of the flow of messages across this channel. The provision of such facilities is only part of the network requirements, however, since 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 ______ interface between user (application) prograrma, normally referred to, as application processes or APs, and the underlying communication services may be ______ For example, one computer may be a small single-user computer, while another may be alarge ______ 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 int ercormected 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, ______, 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 acivities to be placed into perspective with one another.