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1.如果加密密钥和解密密钥相同,这种密码体制称为___.
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3.计算机网络是一些___计算机系统的集合。
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5.计算机网络核作用范围距离划分可分为___、___、___。
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6.网卡也称___网卡是局域网中基本的部件之一,它是连接___的硬件设备。
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7. ADSL技术称为___,作为一种___方式,可以为用户提供宽带网的所有用业务。
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8. Internet 地址是层次结构地址,___和___两部分组成。
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9.超链接不但可以指向网站、网页,而且可以指向___地址。
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10. DNS 是___的简称,ISP 是___ 的简称,HTTP 是___的简称。
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1.高度为h的完全二叉树中最少有___个结点, 最多有___个结点。
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2.设一棵完全二叉树有128 个结点,则该完全二叉树的深度为___,有___个叶子结点。
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3.一般将数据结构分为线性结构和___两大类。
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4.设某算法原操作执行的次数是3n²+4m-7, 则其时间复杂度用数量级表示为___)。
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5. 一种数据结构的元素集合D和它的二元关系R为D={a,b,c,d,e,f,g,h}R={<a,<b, c,<c,d>, <d, e, <e, f>,<f, g, <g, h>}则该数据结构具有___结构。
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6.一种数据结构的元素集合D和它的二元关系R为D={1,2,3,4,5,6}R= {〔1,2〕,〔2,3〕,〔2,4〕, 〔3,5〕,〔3,6〕}则该数据结构具有___结构
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7.设栈S和队列Q的初始状态皆为空,元素a1, a2. a3, a4, a5, a6依次通过一个栈,一个元素出栈后即进入队列Q,若6个元素出队列的顺序是a3a5a4a6a2a1,则栈S至少应该容纳___个元素。
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8.设某棵二叉树中度数为0的结点数为N0,度数为1的结点数为N1,则该二叉树中度数为2的结点数为___; 若采用二叉链表作为该二叉树的存储结构,则该二叉树中共有___个指针域值为空。
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9.设一棵完全二叉树的顺序存储结构中存储数据元素为ABCDEF,则该二叉树的先序遍历序列为___,中序遍历序列为___后序遍历序列为___。
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10.设一棵二叉树的先序序列为ABC,则有___种不同的二叉树可以得到这种序列。
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1.在Windows 7操作系统中文件夹是按___结构组织管理的。
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2.___操作系统是目前全球最大的一个自由软件,它是一个可与商业UNIX操作系统和Windows操作系统系列相媲美的操作系统,具有包括完备的网络应用在内的各种功能。
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3.___是用户对计算机进行配置的重要 工具,默认安装了许多管理程序, 还有
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4. Windows 7操作系统是由___公司开发的。具有革命性变化的操作系统。
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5.要安装Windows7操作系统,系统磁盘分区必须为___格式。
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7.每个文件有且仅有一个文件名,操作系统通过文件名实现对文件的存取。文件名的格式为___.[扩展名]。
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___是图形用户界面中程序和文件的容器,用于存放程序、文档、快捷方式和
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9.通常用文件的___区分不同文件的类型。
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10. 在桌面状态下按,___键可弹出Windows7的“Windows帮助和支持” 窗口。
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1.用户在使用Word 2010编辑、查看或打印已有文档时,首先应当___己有文档。
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2.在Word 2010中为了更好地组织冗长文档的编排,可使用___视图方式。 在这种视图方式中,可以折叠文档以便只看标题、子标题,或者展开查看整个文档。
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3.___是人机交互的窗口, 实际上是指Word 2010显示文档的方式。
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4.电子表格由行列组成的工作表构成,行与列交叉形成的格子称为___,其是Excel 2010中基本的存储单位,可以存放数值、变量、字符、公式等数据。
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5. 在Excel 2010中,在AI单元格中输入=SUM〔8, 7, 8,7〕, 则其值为___.
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6. 准备在一个单元格内输入一个公式,应先输入___ 先导符号。
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7.在PowerPoint 2010中,演示文稿的扩展名是___。
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8.在PowerPoint 2010中,___就是一 组设计设置。 其中包含颜色设置、字体选择、对象效果设置,在很多时候还包含背景图形。
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9.要在PowerPoint 2010中对幻灯片进行保存、打开、新建等操作时.应在___选项卡中操作。
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10.要观察幻灯片中的动画和切换效果,应单击“动画”选项卡的“预览”组中的___。
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1.在数据管理应用需求的推动下,在计算机硬件、软件发展的基础上,数据管理技术经历了___、___、___3个阶段。
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He has made it very clear ___ we should observe the new rules.
A. what
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It was when I read his letter ___ I realized he had given me huge help.
A. that
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Don’t worry too much, Jane. Your son ___ home already. Let’s go back and check it out.
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I believe friendship is an essential element of making a healthy, ___ life.
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___ they have written about the behaviors of animals is hardly anything new.
A. That
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No other drugs are as good as this one; it must have been based on a(n) ___ formula (配方).
A. enormous
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Mothers tend to be too ___ toward their children. They should let them see more of the worl D.
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The investigation ___ evidence of a large-scale illegal trade in wild birds.
A. uncovered
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Poor Laura! I feel so sorry for her. When she fell, she hurt her arm and, ___, broke her glasses.
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Showing some sense of humor can be a(n) ___ way to deal with some stressful situations.
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It will be worth the efforts even if you fail; the rewards you ___ will be great.
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He suggested transporting the supplies by air. But it is absolutely ___, for it will cost too much.
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The newspaper didn’t mention the ___ of the damage caused by the fire.
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Do you ___ her novels as serious literature or as mere entertainment?
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He doesn’t ___ of buying a house this year because the bank has refused to lend him any money.
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If you don’t ___ cooking today, we can go out to eat at the new restaurant.
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Science can now ___ many things which were thought to be mysterious by ancient people.
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When he was a small kid, he ___ from his peers because he could read fast and remember whatever he rea D.
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The fall in the number of deaths from heart disease is generally ___ improvements in diet.
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We can be partners for now, but ultimately you have to ___ to develop a new software for our project.
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Emotional Intelligence (情商) could be of practical use in many ___ such as how companies decide which job applicant to hire, how parents should raise their children, how schools should teach the students, and so on.
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The teacher should praise students for their correct answers and also suggest ___ possibilities.
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In some classrooms, desks are arranged in a U-shape, so the teacher can ___ easily with the students.
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Computer technology ___ individuals to educate themselves and adapt to a constantly changing job market.
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Our hope for an enjoyable dinner was instantly ___ when the waiter dropped a salad plate on my hea D.
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___ the world has ever seen has occurred in the information and communications technologies.
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___ so many people around, it wasn’t convenient to have a long talk with him.
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Alice used to be terribly shy, but working abroad for a year has completely ___ her.
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Chinese Mandarin (普通话) is ___ for foreigners to learn because the changes in the tone will totally change the meaning of words.
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