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使用万用表应注意那些事项？

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A new router, named TK1, is being installed. You wish to add this router to your existing OSPF network. In doing so, you configure the following: TK1(config)# router ospf 1 TK1(config-router)# network 10.10.10.0 255.255.255.0 area 0 After making this change, you notice that the networks attached to TK1 are not being learned by the other OSPF routers. What could be the cause of this?（）

A. The AS is not correctly configured
B. The network subnet mask is incorrectly configured
C. The network wildcard mask is configured incorrectly
D. The network number is not correctly configured
E. The process id is configured incorrectly
F. None of the above

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《光伏发电站接入电力系统技术规定》（GB/T19964-2012）中规定，对于通过（）kV及以上电压等级接入电网的光伏发电站，至调度端应具备两路通信通道，其中一路为光缆通道。

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光头光脚的长阴线表示当日（）。

A. 空方占优
B. 多方占优
C. 多、空平衡
D. 无法判断

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测量高压的压力表，对仪表本身及其安装有何特殊要求？

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