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1、命题人:_ _ 制卷日期:2013-4-5 审核:_ 20 20 学年第学期计算机网络基础试题（A 卷）班级：_ 姓名：_ 学号:_ 题号一二三四五六七八总分得分一、单项选择题(共 30 分，每题 2 分)1计算机网络有（）功能。A.资源共享B.电脑共享C.同一化管理D.资源调节2表示商业公司的一级域名是：（）。A.com B.edu C.org D.net 3OSI 参考模型的第三层是（）。A数据链路层B传输层C表示层D网络层4信号可以分为（）两种信号。A.数字和模拟B.比特和波特C.数据和信息D.码元和码字5下面哪个说法不正确（）。A物理层的数据单元是二进制比特流B数据链路层的数据单元是数
2、据帧C网络层的数据单元是数据包D传输层的数据单元是信元6不能实现浏览WWW 信息的是：（）。A.Mosaic B.Netscape Navigator C.Internet Explorer D.Excel 7UDP 协议提供的是（）类型。A.面向连接的数据报服务B.面向无连接的数据报服务C.面向连接的虚电路服务D.面向无连接的虚电路服务8以下哪个主机在地理位置上是属于中国：（）。A.Microsoft.au B C.ibm.il D.news.in 9在 TCP/IP 参考模型中TCP 协议工作在（）。A.应用层B.传输层C.互联层D.主机网络层10 A 类地址第一个字节的范围是().A.0
3、 126 B.0127 C.1126 D.1127 命题人:_ _ 制卷日期:2013-4-5 审核:_ 11Telnet 服务起什么作用:().A.它是一个新闻组服务B.它是一个聊天服务C.它是一个远程登录服务D.它是一般常用的服务12只能用来传送模拟信号的媒体是()A.同轴电缆B.双绞线C.光纤D.电话线13路由器工作在（），通常比中继器、网桥和交换机复杂。A.应用层B.传输层C.互联层D.网络层14卫星通信的主要缺点是（）A.经济代价大B.传播延迟时间长C.易受干扰D.传输速率低15连接局域网中的计算机与传输介质的网络连接设备是（）A.网卡B.集线器C.交换机D.路由器二、判断题（共 2
4、0 分，每题 2 分）1OSI/RM 参考模型是国家标准，TCP/IP 参考模型是事实标准。（）2TCP/IP 协议族由TCP 协议和 IP 协议组成。（）3ICMP 是 Internet Control Message Protocol 的简称，是网络层协议。（）4FTP 服务器和客户机之间通信时，仅使用20、21 端口，不会使用其他端口。（）5IP 地址由两部分组成，网络地址和主机地址。（）6采用 CSMA/CD 协议的同一总线上的各主机不会发生冲突。（）7交换机和路由器融合是以太网技术发展的一个趋势。（）8DHCP 客户端是使用地址0.0.0.0 来申请一个新的IP 地址的。（）9ADS
5、L“非对称”性是指上行传输速率与下行传输速率不一致。（）10路由器具有路由选择和限制广播的主要特性。（）三、简答（共 20 分，每题 5 分）1叙述计算机网络的定义文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B
6、3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1
7、I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9
8、A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z
9、1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2
10、U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7
11、D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3命题人:_ _ 制卷日期:2013-4-5 审核:_ 2试绘制单工通信、半双工通信和全双工通信的工作
12、示意图。3简述防火墙的局限性。4列举出以太网常见的三种传输介质，并比较说明其特点。文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B
13、3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1
14、I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9
15、A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z
16、1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2
17、U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7
18、D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3命题人:_ _ 制卷日期:2013-4-5 审核:_ 四、简述与分析（共30 分，第一题 15 分，第二题 15 分）1请叙述Internet 的接入方式及不同接入方式的区别。2设学
19、院分到了一个C 类网络号193.71.56.0。按照东、西、南、北区将学院校园网分成4个子网，每个子网需要连接20 台主机，问如何规划子网地址？。文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6
20、P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1
21、J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT
22、5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1
23、L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1
24、S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:
25、CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3命题人:_ _ 制卷日期:2013-4-5 审核:_ 计算机网络基础试题（A 卷参考答案）一、单项选择题(共 30 分
26、，每题 2 分)1.A 2.A 3.D 4.A 5.D 6.D 7.B 8.B 9.B 10.C 11.C 12.D 13.D 14.A 15.A 二、判断题（共 20 分，每题 2 分）1.2.3.4.5.6.7.8.9.10.三、简答（共 20 分，每题 5 分）1.把分布在不同地理位置的计算机、终端，通过通信设备和线路连接起来，以功能完善的网络软件实现相互通信及网络资源共享的系统。2略。3不能防范病毒、不能防范恶意知情者、不能防范来自内部攻击、不能防范不通过防火墙的连接。4三种传输介质：双绞线、同轴电缆、光纤比较其特点：从性能、应用范围、价格等方面比较说明四、简述与分析（共30 分，第一
27、题 15 分，第二题 15 分）1传统拨号方式、光纤接入、无线接入2分析与解答：1）确定需要向最后一个8 位组（主机位）借的位数：如果借 2 位，可以创建4 个子网（其中包含两个保留子网），除去保留的子网地址，只剩下两个可用子网，不够，借3 位，可用子网为（23-2）=6个，64，可满足子网数量的要求；剩下的 5 位为当前的主机位部分，共有（25-2）=30个 IP 地址可用于分配主机，3020，满足每个子网20台主机的需求；2）子网掩码：11111111.11111111.11111111.11100000 转化为十进制：255.255.255.224 3）制定表格表示各个子网可用IP 范围
28、、网络地址、广播地址等子网序号网络地址/子网掩码子 网 网 络 地址广播地址可用的地址范围是 否 可用？1 193.71.56.0/255.255.255.224 193.71.56.0 193.71.56.31/不可用2 193.71.56.32 193.71.56.63 193.71.56.3362 可用3 193.71.56.64 193.71.56.95 193.71.56.6594 可用4 193.71.56.96 193.71.56.127 193.71.56.97126 可用5 193.71.56.128 193.71.56.159 193.71.56.129158 可用6 19
29、3.71.56.160 193.71.56.191 193.71.56.161190 可用7 193.71.56.192 193.71.56.223 193.71.56.193222 可用8 193.71.56.224 193.71.56.255/不可用文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U
30、2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6
31、P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1
32、J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT
33、5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1
34、L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3文档编码:CT5U2Z1B3S3 HU1L6P2U1I10 ZW1S1J7D9A3