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1、第 1 页 共 5 页1.CLOSET(1)、主要的通信传输介质：金属导体（同轴电缆、双绞线）、非金属导体(光纤 )、微波和卫星通信.(2)、分组交换采用存储转发原理，但引起一个新的问题（时延）。(3)在计算机网络中，通信双方必须共同遵守的规则或约定，称为协议(4)在传输数字信号时为了便于传输、减少干扰和易于放大，在发送端需要将发送的数字信号变模拟信号，这种变换过程称为调制。(5).如果按分布的地理范围来划分，计算机网络可分为三类：(局域网、城域网 和 广域网)(6)从计算机网络通信的双方的数据传输方向来看，主要有单工、三种通信方式。(半双工、全双工)(7)、为了使数据链路层更好地适应多种局域
2、网标准，802 委员会将局域网的数据链路层拆成两个子层，即 LLC 、MAC 。(8).在数据链路层，为了实现透明传输，采用法使一帧中首尾两个标志字段之间不会出现与标志字段相同的比特流。（零比特填充法）2.To judge that the following statements are True(T)or False(F)?(1)、不同种类的非屏蔽双绞线用数字划分，通常类别越高，单位长度的绞数越小，越能够减少干扰和提高传输的速率。(F)(2)、如果 OSI 模型中的七层都完全实现，任何两台计算机只要存在一条物理传输信息的方法都能通信。(T)(3)、现在世界上使用的最多的数据链路层协议是PP
3、P协议。（T）(4)、带宽是指单位时间内传输的比特数。(F)(5)、CRC 能检测出任意长度的的突发错误并能纠错。(F)(6)、在连续 ARQ 协议中，发送窗口应该小于等于2n-1，接收窗口的大小应该总是1。(T)(7)、以太网规定了最短有效帧长为64B，凡长度小于 64B的帧都是由于冲突或其他原因而异常中止的无效帧。(T)(8)、停止等待协议是一个数据链路协议，它只解决了差错控制，没有解决流量控制。(9)、拥塞意味着网络所有路径都阻塞，并且导致死锁。(F)(10)、数据链路层使用的地址是物理地址，而网络层使用的地址是IP 地址。(T)Score Marker Checker Score Ma
4、rker Checker 第 2 页 共 5 页3.Select one from the four options(1)IEEE802工程标准中的 802.3 协议是(A )。A局域网的载波侦听多路访问标准B局域网的令牌环网标准C 局域网的互联标准D 以上都不是(2)10BASE-T中，T 通常是指(C )。A细缆 B粗缆 C双绞线 D以太网(3)、在数字传输系统中，传输模拟信号时要将其转换成数字信号，常用的模数转换机制不包括：(A)A正交调制 QAM B 脉码调制 PCM C 脉冲调制 D增幅调制(4)计算机网络的目标是实现（D ）。A数据处理 B信息传输与数据处理 C文献查询 C.资源共
5、享与数据传输(5).网络中各个节点相互连接的形式，叫做网络的（A ）。A拓扑结构 B 协议 C 分层结构 D 分组结构(6)衡量网络上数据传输速率的单位是bps，其含义是（C ）。A.信号每秒传输多少公里 B.信号每秒传输多少公理 C.每秒传送多少个二进制位 D.每秒传送多少个数据(7)、下列关于集线器哪种说法是正确的（A ）A.集线器可以对接收到的信号进行放大 B.集线器具有信息过虑功能C.集线器具有路径选择功能 D.集线器具有交换功能(8)、网桥工作在网络的哪一层：（D）A、物理层 B、网络层 C、传输层 D、数据链路层(9)、下面关于透明网桥的说法错误的一个是：（C）A、透明网桥是一种即
6、用设备；B、透明网桥是目前使用最多的网桥。C、透明网桥不如一般网桥灵活。D、透明网桥能自己创建和更新转发表。(10)、下面不是数据报服务的特点：（D）A.尽最大努力将分组交付给目的主机。B.不保证按源主机发送分组的先后顺序交付给目的主机。C.是一种没有质量保证的服务。Score Marker Checker 文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 H
7、A10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P
8、8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7
9、ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M
10、9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文
11、档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT
12、4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10
13、H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3第 3 页 共 5 页D.是一种面向连接的服务。(11)、在数据链路层中，（C）用于描述数据单位，作为该层的数据处理单元。A.数据报 B.报文C.帧 D.分组(12)、因特网是由分布在世界各地的计算机网络借助于（D）设备相互连接而形成的。A.Hub B.交换机 C.网桥 D.路由器(13)、下列关于第二层交换机，哪种说法是错误的（C）A.交换机可以对接收到的信号进行放大 B.交换机具有信息过虑功能C.交换机具有路径选择功能 D.交换机具有交换功能(14)
14、、在TCP/IP体系结构模型中，(A)是属于网络层的协议，主要负责完成IP地址向物理地址转换的功能；A.ARP协议 B.IP协议 C.停止等待协议 D.ARQ 协议(15)、在以太网中，当一台主机发送数据时，总线上所有计算机都能检测到这个数据信号，只有数据帧中的目的地址与主机的地址一致时，才主机才接收这个数据帧。这里所提到的地址是（A）。A.MAC 地址 B.IP地址 C.端口 D.地理位置(16)、在使用 ATM 技术的网络中，选择固定长度的(C)作为信息传输的单位，有利于宽带高速交换。A.MAC 帧 B.IP数据报 C.信元 D.报文(17)、将物理信道的总频带宽分割成若干个子信道，每个子
15、信道传输一路信号，这种信道复用技术是（B ）。A码分复用 B.频分复用 C.时分复用 D.空分复用(18)、在广域网中，X.25技术和帧中继技术在端到端的传输中使用(D)技术 A报文交换 B.电路交换 C.数据报分组交换 D.虚电路分组交换4.Calculate topic(1).若 10Mbps的 CSMA/CD 局域网的节点最大距离为2Km，信号在媒体中的传播速度为2108m/s。只考虑传播时延和发送时延，求该网的最短帧长。往返时延 =4Km/2108m/s=2 10-5s 最短帧长 =10Mbps*往返时延 =20*10610-5 s=200b Score Marker Checker
16、文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:C
17、T4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M1
18、0H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8
19、HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9
20、P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7
21、 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6
22、M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3第 4 页 共 5 页(2).对于下列给定的值，不考虑差错重传，非受限协议和停止等待协议的有效数据率是多少？（即每秒中传输了多少真正的数据，单位比特/秒）。R=传输速率
23、 (16Mbps)S=信号传播速度 (200m/us)D=接收主机和发送主机之间传播距离(200Meters)T=创建 Framed的时间(2us)F=每 frame 的长度(500 bit)N=每 frame 中的数据长度(450bit)A=确认帧 ACK的帧长.(80bit)非受限协议：effective data rate=NT+FR(2)=450 bits2 sec+500 bits16 bits/sec 13.53 bits/sec=13.53 Mbps(1)for the stop and wait protocol.停止等待协议：effective data rate=RA+F+
24、)SD+(T2N(2)=450 bits 2(2 sec+200 meters200 meters/sec)+500 bits+80 bits16 bits/sec 10.65 bits/sec=10.65 Mbps(1)(3).假设要在 10,000Hz 的最大频带宽上达到100,000bps，允许的最小信噪比是多少？为什么？Bit rate=bandwith*log2(1+SN)(2%)文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 H
25、A10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P
26、8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7
27、ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M
28、9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文
29、档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT
30、4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10
31、H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3第 5 页 共 5 页So:10000=10000 log2(1+SN)log2(1+SN)=10 1+SN=1024 SN=1023.(4%)文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7
32、ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M
33、9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文
34、档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT
35、4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10
36、H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 H
37、A10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3文档编码:CT4R5M10H5K8 HA10B9P8N3I7 ZP8E6M9D8I3