图片的数字化有两种方法,空间离散和形状(轮廓)抽象,分别生成位图图像和()。
A、空间图形
B、矢量图形
C、位图图形
D、两维图形
You want to analyze a SQL Tuning Set (STS) using SQL Performance Analyzer in a test database. Which two statements are true regarding the activities performed during the test execution of SQLs in a SQL Tuning Set?()
AEvery SQL statement in the STS is considered only once for execution
BThe SQL statements in the STS are executed concurrently to produce the execution plan and execution statistics
CThe execution plan and execution statistics are computed for each SQL statement in the STS
DThe effects of DDL and DML are considered to produce the execution plan and execution statistics
某个学生在课堂上故意弄出响声以引起教师的注意,这时,采取()的处理方法最为适宜。
A、言语提醒
B、非言语暗示
C、有意忽视
D、暂时隔离
控制进度的一个重要作用是()。
A、决定是否需要对进度偏差采取纠正措施
B、定义需要生产项目可交付成果所需的活动
C、评估范围的定义是否足以支持进度计划
D、保证项目小组士气高昂,小组成员能够发挥最大潜能
以下哪些选项中是TCP数据段所具有而UDP所没有的?()
A、源端口号
B、目的端口号
C、顺序号
D、应答号
E、滑动窗口大小
F、上层数据