200204.htm

等级考试三级试题全集

<p class=a2>③ 它具有几乎无限的存储能力</p>

<p class=a2>④ 它能方便而迅速与其它计算机交换信息</p>

<p class=a2>上面叙述那些是正确的？</p>

<p class=a2><span lang=EN-US>A）①、②和④<span style='mso-spacerun:yes'>&nbsp;&nbsp;
</span>B）①、③和④<span style='mso-spacerun:yes'>&nbsp;&nbsp; </span>C）①、②、③和④<span
style='mso-spacerun:yes'>&nbsp;&nbsp; </span>D）②、③、④</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(3)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
style='font-family:宋体'>下面是关于<span lang=EN-US>PC计算机主存储器的一些叙述：<o:p></o:p></span></span></p>

<p class=a2>①主存储器的基本编址单元的长度为<span lang=EN-US>32位</span></p>

<p class=a2>②主存储器也称为内存，它是一种动态随机存取存储器</p>

<p class=a2>③目前市场上销售的<span lang=EN-US>PC机的内存容量多数已达64MB以上</span></p>

<p class=a2>④<span lang=EN-US>PC机的内存容量一般是可以扩大的</span></p>

<p class=a2>其中正确的是：</p>

<p class=a2><span lang=EN-US>A）①和③<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp; </span><span style='mso-tab-count:
1'>&nbsp;&nbsp; </span>B）①、③和④<span style='mso-spacerun:yes'>&nbsp;&nbsp;
</span>C）①、②、③和④ <span style='mso-tab-count:1'>&nbsp; </span>D）②、③和④</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(4)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
style='font-family:宋体'>下面有关<span lang=EN-US>PCI局部总线的叙述中，错误的是哪一项？<o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）PCI局部总线上有三类信号：数据信号、地址信号和控制信号</span></p>

<p class=a2><span lang=EN-US>B）PCI局部总线是16位总线，数据传输速率可达到5MB/S</span></p>

<p class=a2><span lang=EN-US>C）PCI局部总线用于连接PC机中的高速设备</span></p>

<p class=a2><span lang=EN-US>D）PCI局部总线目前在PCSM中已得到广泛采用</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(5)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
style='font-family:宋体'>下面是关于<span lang=EN-US>PC机CPU的若干叙述：<o:p></o:p></span></span></p>

<p class=a2>① <span lang=EN-US>CPU中包含几十个甚至上百个寄存器，用来临时存放待处理的数据</span></p>

<p class=a2>② <span lang=EN-US>CPU是PC机中不可缺少的组成部分，它担负着运行系统软件和应用软件的任务</span></p>

<p class=a2>③ <span lang=EN-US>CPU的速度比主存器低得多，使用高速缓存（CACHE）可以显著提高系统的速度</span></p>

<p class=a2>④ <span lang=EN-US>PC机中只有1个微处理器它就是CPU</span></p>

<p class=a2>其中错误的是：</p>

<p class=a2><span lang=EN-US>A）①和③<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp; </span><span style='mso-tab-count:
1'>&nbsp;&nbsp; </span>B）②和③<span style='mso-spacerun:yes'>&nbsp;&nbsp; </span><span
style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>C）②和④<span
style='mso-spacerun:yes'>&nbsp;&nbsp; </span><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>D）③和④</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(6)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
lang=EN-US style='font-family:宋体'>PC机的运算速度是指它每秒钟所能执行的指令数目。下面哪些是提高运算速度的有效措施？<o:p></o:p></span></p>

<p class=a2>① 增加<span lang=EN-US>CPU中寄存器的数目</span></p>

<p class=a2>② 提高<span lang=EN-US>CPU的主频</span></p>

<p class=a2>③ 增加高速缓存（<span lang=EN-US>CACHE）的容量</span></p>

<p class=a2>④ 扩充<span lang=EN-US>PC机磁盘存储器的容量</span></p>

<p class=a2><span lang=EN-US>A）①和③<span style='mso-spacerun:yes'>&nbsp;&nbsp;
</span><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>B）①、②和③<span
style='mso-spacerun:yes'>&nbsp;&nbsp; </span>C）①和④<span
style='mso-spacerun:yes'>&nbsp;&nbsp; </span><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>D）②、③和④</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(7)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
style='font-family:宋体'>下面是关于计算机中定点数和浮点数的一些叙述：<span lang=EN-US><o:p></o:p></span></span></p>

<p class=a2>① 浮点数是既有整数又有小数的数，定点数只能表示纯小数</p>

<p class=a2>② 浮点数使用补码表示，定点数使用原码表示</p>

<p class=a2>③ 浮点数和定点数字长相同时，浮点数可表示的数值范围大，定点数范围小</p>

<p class=a2>④ 浮点数和定点数字长相同时，浮点数精度低，定点数精度高</p>

<p class=a2>其中正确的是：</p>

<p class=a2><span lang=EN-US>A）②和④<span style='mso-spacerun:yes'>&nbsp;&nbsp;
</span><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>B ①和②<span
style='mso-spacerun:yes'>&nbsp;&nbsp; </span><span style='mso-tab-count:2'>&nbsp;&nbsp;&nbsp;&nbsp; </span>C）①和④<span
style='mso-spacerun:yes'>&nbsp;&nbsp; </span><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>D）③和④</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(8)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
lang=EN-US style='font-family:宋体'>WINDOWS98操作系统属于：<o:p></o:p></span></p>

<p class=a2><span lang=EN-US>A）单用户单任务操作系统<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:1'>&nbsp;&nbsp; </span>B）单用户多任务系统</span></p>

<p class=a2><span lang=EN-US>C）多用户多任务操作系统<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:1'>&nbsp;&nbsp; </span>D）多用户单任务系统</span></p>

<p class=a1 style='margin-left:18.0pt;text-indent:-18.0pt;mso-list:l7 level1 lfo90;
tab-stops:list 18.0pt'><![if !supportLists]><span lang=EN-US style='font-family:
宋体;mso-bidi-font-family:宋体'><span style='mso-list:Ignore'>(9)<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span></span><![endif]><span
style='font-family:宋体'>下面关于计算机病毒的一些叙述中错误的是：<span lang=EN-US><o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）网络环境下计算机病毒往往是通过电子邮件传播的</span></p>

<p class=a2><span lang=EN-US>B）电子邮件是个间的通信手段，即使传播计算机病毒也是个别的，影响不大</span></p>

<p class=a2><span lang=EN-US>C）目前防火墙还无法保障单位内部计算机不受带病毒电子邮件攻击</span></p>

<p class=a2><span lang=EN-US>D）一般情况下只要不打开电子邮件及附件，系统就不会感染它所携带动的病毒</span></p>

<p class=a1 style='margin-left:18.7pt;text-indent:-18.7pt;mso-list:l7 level1 lfo90'><![if !supportLists]><span
lang=EN-US style='font-family:宋体;mso-bidi-font-family:宋体'><span
style='mso-list:Ignore'>(10)<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='font-family:宋体'>下现关于线性表的叙述错误的是：<span
lang=EN-US><o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）若用数组表示，表中诸元素的存储位置是连在一起的</span></p>

<p class=a2><span lang=EN-US>B）若用链表示，便于插入和删除操作</span></p>

<p class=a2><span lang=EN-US>C）若用链表表示，不需要占用一片相邻的存储空间</span></p>

<p class=a2><span lang=EN-US>D）表的插入和删除操作仅允许表的一端进行</span></p>

<p class=a1 style='margin-left:18.7pt;text-indent:-18.7pt;mso-list:l7 level1 lfo90'><![if !supportLists]><span
lang=EN-US style='font-family:宋体;mso-bidi-font-family:宋体'><span
style='mso-list:Ignore'>(11)<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='font-family:宋体'>可以用带表头结点的链表表示线性表，也可用不带表头结点的链表表示的线性表，前者最主要的好处是：<span
lang=EN-US><o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）可以加快对表的遍历<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:2'>&nbsp;&nbsp;&nbsp;&nbsp; </span>B）使空表和非空表的处理统一</span></p>

<p class=a2><span lang=EN-US>C）节省存空间<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style='mso-tab-count:2'>&nbsp;&nbsp;&nbsp;&nbsp; </span>D）可以提高存取表元素的速度</span></p>

<p class=a1 style='margin-left:18.7pt;text-indent:-18.7pt;mso-list:l7 level1 lfo90'><![if !supportLists]><span
lang=EN-US style='font-family:宋体;mso-bidi-font-family:宋体'><span
style='mso-list:Ignore'>(12)<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='font-family:宋体'>下列关于栈的叙述中不正确的是：<span
lang=EN-US><o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）栈是线性结构<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style='mso-tab-count:2'>&nbsp;&nbsp;&nbsp;&nbsp; </span>B）栈是一种特殊的线性表</span></p>

<p class=a2><span lang=EN-US>C）栈具先进先出特征<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:2'>&nbsp;&nbsp;&nbsp;&nbsp; </span>D）栈具有后进先出特征</span></p>

<p class=a1 style='margin-left:18.7pt;text-indent:-18.7pt;mso-list:l7 level1 lfo90'><![if !supportLists]><span
lang=EN-US style='font-family:宋体;mso-bidi-font-family:宋体'><span
style='mso-list:Ignore'>(13)<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='font-family:宋体'>假定根结点的层次是<span
lang=EN-US>0，含有15个结点的二叉树的最小高度是多少？<o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）4<span style='mso-tab-count:3'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>B）5<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>C）3<span style='mso-tab-count:
3'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>D）6</span></p>

<p class=a1 style='margin-left:18.7pt;text-indent:-18.7pt;mso-list:l7 level1 lfo90'><![if !supportLists]><span
lang=EN-US style='font-family:宋体;mso-bidi-font-family:宋体'><span
style='mso-list:Ignore'>(14)<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='font-family:宋体'>对任意一棵树，设它有<span
lang=EN-US>n个结点,这n个结点的度数之和为d,下列关系正确的是:<o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）d=n<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:1'>&nbsp; </span>B）d=n-2<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style='mso-tab-count:1'>&nbsp; </span>C）d=n+1<span
style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp; </span><span style='mso-tab-count:
1'>&nbsp;&nbsp;&nbsp; </span>D）d=n-1</span></p>

<p class=a1 style='margin-left:21.7pt;text-indent:-21.7pt;mso-list:l7 level1 lfo90'><![if !supportLists]><span
lang=EN-US style='font-family:宋体;mso-bidi-font-family:宋体'><span
style='mso-list:Ignore'>(15)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-family:宋体'>设表<span lang=EN-US>L1和L2有相同的组成元素，L1已按各元素的值的大小排好序，L2尚未排好序，用顺序检索方法分别对L1和L2进行检索，下列结论正确的是：<o:p></o:p></span></span></p>

<p class=a2><span lang=EN-US>A）对给定的值K，若检索成功，两者比较次数一定相等</span></p>

<p class=a2><span lang=EN-US>B）对给定的值K，若检索成功，对L1的比较次数总小于对L2的比较次数</span></p>

<p class=a2><span lang=EN-US>C）对给定的值K，若检索不成功，对L2的比较次数总大于对L1的比较次数</span></p>

<p class=a2><span lang=EN-US>D）在等概率情况下，若检索成功，检索一个元素的平均比较次数相等</span></p>