
【名词&注释】
电子邮件(e-mail)、灵活性(flexibility)、图形化(graphical)、指令系统(instruction system)、偏移量(offset)、寄存器(register)、地址码(address code)、存储单元的地址(access unit address)、工具栏(toolbar)、操作数(operand)
[单选题]邮件服务器使用POP3的主要目的是______。
A. 创建邮件
B. 管理邮件
C. 收发邮件
D. 删除邮件
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举一反三:
[单选题]计算机指令系统中采用不同寻址方式可以提高编程灵活性,立即寻址是指(8)。
A. 操作数(operand)包含在指令中
B. 操作数(operand)的地址包含在指令中
C. 操作数(operand)在地址计数器中
D. 操作数(operand)在寄存器中
[单选题]设根结点的层次为0,则高度为K的二叉树的最大结点数为______
A. 2K-1
B. 2K
C. 2K+1-1
D. 2K+1
[单选题]Network managers have long awaited practical voice-over-IP(VOIP)solutions. VOIP promises ease network management and decreases(66)by converging a company's telephony and data infrastructures into one network. And a VOIP solution implemented at a company's head-quarters with far-reaching branch offices can(67)tremendous amounts of money in long distance phone bills, provided that solution delivers POTS-like voice(68)over the Internet.VOIP gateways are designed to convert voice from the(69)domain to the circuit switched domain. VOIP solutions use a digital signal processor(DSP)to process the voice data, preparing the voice sample for transmission by compressing voice and removing jitter. The VOIP equipment must comply with the(70)H.323 standard defined by the International Telecommunication Union, or ITU.
A. time
B. cash
C. costs
D. space
[单选题]A graphical bar With buttons that perform. some of the most common commands.
A. Title bar
B. Tool bar
C. Status bar
D. Scroll bar
[单选题]●下列关于Word标尺的叙述中,不正确的是(43)。(43)
A. 首行缩进可使光标所在段落的第一行向右缩进
B. 左缩进可使光标所在段落的整体从左边界向右缩进
C. 右缩进可使光标所在段落的整体从右边界向左缩进
D. 悬挂缩进可使光标所在段落所有的行按向左或向右的拖动方向缩进
[多选题]●设有学生关系Student(学号,姓名,系名,课程号,成绩),则查询至少选修了四门课程的学生学号、姓名及平均成绩的SELECT语句为:SELECT学号,姓名,(59)
A. FROM Student
B. GROUP BY(60)
C. HAVING(61)
D. SUM(成绩)
E. AVG(SUM(成绩))
F. AVG(成绩)AT平均成绩
G. AVG(成绩)AS平均成绩
H. 学号
I. 姓名
J. 系名
K. 课程号
L. COUNT(DISTINCT学号)>3
M. COUNT(课程号)>3
N. COUNT(DISTINCT学号)>=3
O. COUNT(课程号)>=3
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