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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，边上的值表示完成活动所需要的时间，则关键路径长度为（）。

软件测试的对象包括（）。
①软件代码
②文档
③数据

编写测试计划的目的是（）。
①测试工作顺利进行
②使项目参与人员沟通更舒畅
③使测试工作更加系统化
④软件过程规范化的要求
⑤控制软件质量
 

以下属于安全测试方法的是（）。
①安全功能验证
②安全漏洞扫描
⑨模拟攻击实验
④数据侦听

将Students表的插入权限赋予用户UserA，并允许其将该权限授予他人，应使用的SQL语句为：
GRANT (1) TABLE Students TO UserA (2) ;
 

某企业生产流水线M共有两位生产者，生产者甲不断地将其工序上加工的半成品放入半成品箱，生产者乙从半成品箱取出继续加工。假设半成品箱可存放n件半成品，采用PV操作实现生产者甲和生产者乙的同步可以设置三个信号量S、S1和S2，其同步模型如下图所示。

信号量S是一个互斥信号量，初值为 (6) ；S1、S2的初值分别为 (7) 。

若有关系R (A，B，C，D)和S(C，D，E)，则与表达式π_3,4,7(σ_4＜5(R×S))等价的SQL语句如下：
SELECT (3) FROM (4) WHERE (5) ;
 

TCP是互联网中的 (12) 协议，使用 (13) 次握手协议建立连接。
 

Extreme Programming (XP) is a discipline of software development with (14) of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any (15) project that needs to deliver quality software rapidly and flexibly.
An XP project needs a(an) (16) customer to provide guidance. Customers, programmers, managers, are all working (17) to build the system that’sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to (18) what they need, to be sure that they are getting what they need,and to steer the project to success.

若某文件系统的目录结构如下图所示，假设用户要访问文件f1.java，且当前工作目录为Program，则该文件的全文件名为 (8) ，其相对路径为 (9) 。

A类网络是很大的网络，每个A类网络中可以有 (10) 个网络地址。实际使用中必须把A类网络划分为子网，如果指定的子网掩码为255.255.192.0，则该网络被划分为 (11) 个子网。

若有关系R (A，B，C，D)和S(C，D，E)，则与表达式π_3,4,7(σ_4＜5(R×S))等价的SQL语句如下：
SELECT (3) FROM (4) WHERE (5) ;
 

将Students表的插入权限赋予用户UserA，并允许其将该权限授予他人，应使用的SQL语句为：
GRANT (1) TABLE Students TO UserA (2) ;
 

某企业生产流水线M共有两位生产者，生产者甲不断地将其工序上加工的半成品放入半成品箱，生产者乙从半成品箱取出继续加工。假设半成品箱可存放n件半成品，采用PV操作实现生产者甲和生产者乙的同步可以设置三个信号量S、S1和S2，其同步模型如下图所示。

信号量S是一个互斥信号量，初值为 (6) ；S1、S2的初值分别为 (7) 。

TCP是互联网中的 (12) 协议，使用 (13) 次握手协议建立连接。
 

A类网络是很大的网络，每个A类网络中可以有 (10) 个网络地址。实际使用中必须把A类网络划分为子网，如果指定的子网掩码为255.255.192.0，则该网络被划分为 (11) 个子网。

Extreme Programming (XP) is a discipline of software development with (14) of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any (15) project that needs to deliver quality software rapidly and flexibly.
An XP project needs a(an) (16) customer to provide guidance. Customers, programmers, managers, are all working (17) to build the system that’sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to (18) what they need, to be sure that they are getting what they need,and to steer the project to success.

若某文件系统的目录结构如下图所示，假设用户要访问文件f1.java，且当前工作目录为Program，则该文件的全文件名为 (8) ，其相对路径为 (9) 。

若有关系R (A，B，C，D)和S(C，D，E)，则与表达式π_3,4,7(σ_4＜5(R×S))等价的SQL语句如下：
SELECT (3) FROM (4) WHERE (5) ;
 

Extreme Programming (XP) is a discipline of software development with (14) of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any (15) project that needs to deliver quality software rapidly and flexibly.
An XP project needs a(an) (16) customer to provide guidance. Customers, programmers, managers, are all working (17) to build the system that’sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to (18) what they need, to be sure that they are getting what they need,and to steer the project to success.

Extreme Programming (XP) is a discipline of software development with (14) of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any (15) project that needs to deliver quality software rapidly and flexibly.
An XP project needs a(an) (16) customer to provide guidance. Customers, programmers, managers, are all working (17) to build the system that’sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to (18) what they need, to be sure that they are getting what they need,and to steer the project to success.

Extreme Programming (XP) is a discipline of software development with (14) of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any (15) project that needs to deliver quality software rapidly and flexibly.
An XP project needs a(an) (16) customer to provide guidance. Customers, programmers, managers, are all working (17) to build the system that’sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to (18) what they need, to be sure that they are getting what they need,and to steer the project to success.