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【判断题】
Internet其实就是一台提供特定服务的计算机
A. 对
B. 错
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同轴电缆只能传送数字信号,模拟信号要用光纤才可以传输
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对等网络中的计算机只能作为客户机
A. 对
B. 错
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MODEM是对传输信号进行A/D和D/A转换的,是在模拟信道中传输数字信号时不可缺少的设备
A. 对
B. 错
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网络层的协议ARP实现物理地址转换为IP地址的功能
A. 对
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使用自己的电脑上互联网,肯定不会泄露私人信息
A. 对
B. 错
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光缆的光束是在玻璃纤维内传输的
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接入网不可以在同一个网络中同时实现语音、数据和图像三种业务
A. 对
B. 错
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若一线路传输信号的频率范围为750~2500Hz,则线路带宽为2500Hz
A. 对
B. 错
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计算机网络的三个主要组成部分是若干主机、一个通信子网、一组通信协议
A. 对
B. 错
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分组交换的分组长度是不受限制的
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中国最早提出信息高速公路的概念
A. 对
B. 错
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保密性是指信息不泄露给非授权用户、实体或过程,或供其利用的特性
A. 对
B. 错
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密码破解也是黑客常用的攻击手段之一
A. 对
B. 错
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在一个城市范围内所建立的计算机通信网称为城域网
A. 对
B. 错
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后门程序是黑客攻击的唯一手段
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传输延迟大是卫星通信的缺点
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安装个人防火墙是预防网络病毒的唯一方法
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一个网络的子网掩码为255.255.248.0,则150.150.42.0是该网络中的合法网络地址
A. 对
B. 错
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计算机安全和防火、防盗没有关系
A. 对
B. 错
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网络安全威胁是指对网络信息的潜在危害
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IGMP协议工作在TCP/IP协议的传输层
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依懒性属于网络安全特性之一
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B. 错
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网卡速率是决定网络传输速度的一个性能指标,其单位是MBps,即兆字节/秒
A. 对
B. 错
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对等网络中,计算机地位平等,没有从属关系,也没有专用的服务器和客户机
A. 对
B. 错
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在客户机/服务器网络中,至少有一台以上的专用服务器用来管理网络,控制网络运行
A. 对
B. 错
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TCP/IP是由国际标准化组织提出的一组网络协议
A. 对
B. 错
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通过把重要的文档、程序和文件加密,可以加强计算机的逻辑安全
A. 对
B. 错
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计算机网络按传输技术可以分为全双工、半双工、单工网络
A. 对
B. 错
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总线型拓扑结构的特点是:结构简单,扩展容易,网络中任何节点的故障都不会造成全网的故障,可靠性较高
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B. 错
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环状网络的特点之一是实时性差
A. 对
B. 错
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网际层协议UDP用来提供面向无连接的不可靠的信息传送服务
A. 对
B. 错
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广域网的结构复杂,一般多为网状拓扑结构
A. 对
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域名从左到右网域逐级变低,高一级网域包含低一级网域
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网络中的计算机资源主要指服务器、工作站、用户计算机
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信号的电平随时间连续变化,这类信号称为模拟信号
A. 对
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星型拓扑结构采用集中控制的策略,依赖于中央节点,若中央节点产生故障,则全网不能工作,因此可靠性差
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B. 错
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如果多台计算机之间存在着明确的主/从关系,其中一台中心控制计算机可以控制其它连接计算机的开启与关闭,那么这样的多台计算机系统就构成了一个计算机网络
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树型网络属于分布式网络,而网状网络属于分层式网络
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( ) 26. Where does the writer of "The little Prince" come from? A.England. B.France. C.America. D.China.
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( ) 27. What does the prince do after the fox tells him a secret? A.He cares more about a flower and a sheep. B.He meets many more strange adults on other planets. C.He realizes his love for the rose and he goes back to his planet.   D.He discovers interesting things such as a snake, other roses and a fox
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( ) 28. What does "The little Prince" mainly talk about? It' s about _________. A.the adult world B.the planet B -612 C.a rose and a fox D.the adventure of a young prince
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( ) 29. What is the writer's main purpose(目的)in writing this passage?    A.To tell the readers his life story.    B.To tell people what kind of person his father was.    C.To tell the readers what present he got from his father.    D. To let people know how poor he was.
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( ) 30. Why did the father not ask his son not to do this and do that?    A.Because he felt quite confident of his son.    B.Because he was born from a poor family.    C.Because he was a man of few words.    D.Because he didn't want to be much too strict with his son.
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【单选题】
( ) 31. What would someone learn from this passage?    A.How to live by oneself. B.How to stand on one's own feet.    C.What a good father should do. D.What the self-important is like.
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( ) 32. What may be the proper Chinese for the underlined part in the passage?    A.闲暇时光 B.学费 C.精神空虚 D.经济不足
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( ) 33. Why did Natalie Smith pay for the six cars behind her? A. She had seven tickets. B. She hoped to please others. C. She knew the car drivers well. D. She wanted to show kindness.
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【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
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【单选题】
( ) 35. Who came up with the phrase according to the passage? A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
A. A
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【单选题】
( ) 36. What can we infer from the last paragraph? A. People should practice random kindness to those in need. B. People who receive kindness are likely to offer it to others. C. People should practice random kindness to strangers they meet. D. People who receive kindness are likely to pay it back to the giver.
A. A
B. B
C. C
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【单选题】
( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
A. A
B. B
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【单选题】
( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
A. A
B. B
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【单选题】
( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
A. A
B. B
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( ) 40. The best title of the passage is ___________. A. Rivers in Cities B. The importance of Rivers C. Transportation D. Natural Resources
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