（）不会影响测试质量。
A.用户需求频繁变化
B.测试流程不规范
C.采用背靠背测试方式
D.测试周期被压缩

确定系统边界和关系规范化分别在数据库设计的()阶段进行。
A.需求分析和逻辑设计
B.需求分析和概念设计
C.需求分析和物理设计
D.逻辑设计和概念设计

Teams are required for most engineering projects.Although some small hardware or software products can be developed by individuals,the scale and complexity of modern systems is such,and the demand for short schedules so great,that it is no longer（ ）for one person to do most engineering jobs.Systems development is a team（ ）,and the effectiveness of the team largely determines the（请作答此空）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（ ）.However,on systems maintenance and enhancement teams,the engineers often work relatively independently,much like wrestling and track teams.A team is（ ）just a group of people 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.
A.size
B.quality
C.scale
D.complexity

假设系统有n个进程共享资源R，且资源R的可用数为3，其中n≥3，若采用P-V操作，则信号量S的取值范围应为（）
A.-1～（n-1）
B.-3～3
C.-（n-3）～3
D.-（n-1）～1

若UML类图中包含订单和订单明细两个类，则这两个类之间的关系应为（）。
A.关联
B.聚合
C.组装
D.继承

非空二叉排序树的定义是：若根结点具有左子树，则左子树中所有结点的关键码均小于根结点的关键码：若根结点具有右子树，则右子树中所有结点的关键码均大于根结点的关键码;左、右子树也是二叉排序树。由此可知，在一个二叉排序树中（）。
A.从根结点到任何一个叶子的路径上，结点的关键码序列呈递增排序
B.从根结点到任何一个叶子的路径上，结点的关键码序列呈递减排序
C.同层次结点从左向右排序，结点的关键码序列呈递增排序
D.同层次结点从左向右排序，结点的关键码序列呈递减排序