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什么情况下可行使不安抗辩权？

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目前中国联通WCDMA网络已使用的频点有哪3个？

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农村信用社内部审计立项阶段要做哪些工作？

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Study the Exhibit below carefully: London#show vtp VTP Version: 2 Configuration Revision: 0 Maximum VLANs supported locally: 64 Number of existing VLANs: 5 VTP Operating Mode: Client VTP Domain Name: London VTP Pruning Mode: Disabled VTP V2 Mode: Disabled VTP Traps Generation: Disabled Based on the information given above, what is the VTP function of this particular switch?（）

A. Learn and save VTP configuration in the running configuration.
B. Create and change VLANs.
C. Forwards information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRA

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在光纤数字通信系统中，误码性能用（）来衡量。

A. 误字率
B. 误比特率
C. 误字节率
D. 误信息率

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