What are two characteristics of SLB router mode?（）
A. The design supports multiple server subnets.
B. An end-user sees the IP address of the real server.
C. SLB routes between the outside and inside subnets.
D. The source or destination MAC address is rewritten, but the IP addresses left alone.
E. SLB acts as a "bump in the wire" between servers and upstream firewall or Layer 3 devices.
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可编程序控制器具有很高的可靠性和抗干扰能力的原因是什么？
刚入院的房间隔缺损的病人，护士在身体评估的时候会发现（）
A. 口唇发绀、双颊红润
B. 身体瘦小
C. 心前区收缩期杂音
D. 智力下降
E. 口齿不清
什么是电压互感器的电压误差？什么是电流互感器的电流误差？
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