包过滤防火墙是一种通过软件检查数据包以实现系统安全防护的基本手段，以下叙述中，不正确的是( )。

____________开发过程模型以用户需求为动力，以对象作为驱动，适合于面向对象的开发方法。

软件测试的对象包括__________。①需求规格说明书②概要设计文档③软件测试报告④软件代码⑤用户手册⑥软件开发人员

在ISO／IEC软件质量模型中，功能性是与一组功能及其指定的性质的存在有关的一组属性，其子特性不包括__________。

属于CPU中算术逻辑单元的部件是( ) 。

某企业的生产流水线上有2名工人P1和P2，1名检验员P3。P1将初步加工的半成品放入半成品箱B1；P2从半成品箱B1取出继续加工，加工好的产品放入成品箱B2；P3从成品箱B2取出产品检验。假设B1可存放n件半成品，B2可存放m件产品，并设置6个信号量S1、S2、S3、S4、S5和S6，且S3和S6的初值都为0。采用PV操作实现P1、P2和P3的同步模型如下图所示，则信号量S1和S5__________(8)；S2、S4的初值分别为___________(9)。

下图为某设计模式的类图，类State和Context的关系为(49)，类(50)是客户使用的主要接口。

给定关系模式R(A，B，C，D)、S(C，D，E)，与π1,3,5等价的SQL语句如下：SELECT(22)FROMR，sWHERE(23)；下列查询B=“信息”且E=“北京”的A、B、E的关系代数表达式中，查询效率最高的是(24)。

以下属于影响软件可靠性因素的是( )。 ①软件运行剖面 ②软件规模 ③软件内部结构 ④软件的开发方法和开发环境 ⑤软件的可靠性投入

在进行可用性测试时关注的问题应包括( )。 ①安装过程是否困难 ②错误提示是否明确 ③GUI接口是否标准 ④登录是否方便 ⑤帮助文本是否上下文敏感

在分层体系结构中， (41) 实现与实体对象相关的业务逻辑。在基于Java，EE技术开发的软件系统中，常用 (42) 技术来实现该层。

__________不属于使用软件测试工具的目的。

以下关于分层体系结构的叙述中，不正确的是____________。

以下关于模块耦合关系的叙述中，耦合程度最低的是__________(39)，其耦合类型为___________(40)耦合。

下图是一个软件项目的活动图，其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(33)在关键路径上。活动GH的松弛时间是(34)。

在进行软件设计时，以下结构设计原则中，不正确的是( )。

ICMP协议属于因特网中的 (27)协议，ICMP协议数据单元封装在(28) 中传送。

Teams are required for most engineering projects．Although some small hardware or software products can be developed by individuals，the scale and complexity of modem systems is such，and the demand for short schedules SO great，that it is no longer (71) for one pe~on to do most engineering jobs．Systems development is a team (72)，and the effectiveness of the team largely determines the (73) of the engineering． Development teams often behave much like baseball or basketball teams．Even though they may have multiple specialties，all the members work toward (74) ．However,on systems maintenance and enhancement teams，the engineers often work relatively independently.much like wrestling and track teams． A team is (75) just a group ofpeople who happen to work together．Teamwork takes practice and it involves special skills．Teams require common processes；they need agreed-upon goals；and they need effective guidance and leadership．The methods for guiding and leading such teams are well known，but they are not obvious．

In a world where it seems we already have too much to do，and too many things to think about，it seems the last thing we need is something new that we have to learn．But use cases do solve a problem with requirements：with____________(71)declarative requirements it's hard to describe steps and sequences of events． Use cases，stated simply,allow description of sequences of events that，taken together, lead to a system doing something useful．As simple as this sounds，this is important．When confronted only with a pile of requirements，it’S often ____________(72)to make sense of what the authors of the requirements really wanted the system to do．In the preceding example，use cases reduce the ambiguity of the requirements by specifying exactly when and under what conditions certain behavior occurs；as such，the sequence of the behaviors can be regarded as a requirement．Use cases are particularly well suited to capturing these kind of requirements．Although this may sound simple，the fact is that __________(73)requirement capture approaches，with their emphasis on declarative requirements and”shall”statements．completely fail to capture the___________(74)of the system's behavior．Use cases are a simple yet powerful way to express the behavior of the system in Way that all stakeholders can easily understand． But，like anything，use cases come with their own problems，and as useful as they are，they can be ___________(75)．The result is something that is as bad，if not worse，than the original problem．Therein it's important to utilize use cases effectively without creating a greater problem than the one you started with．

在数据库逻辑设计阶段，若实体中存在多值属性，那么将E-R图转换为关系模式时， ___________，得到的关系模式属于4NF。