Excel中单元格引用中，单元格地址会随位移的方向与大小而改变的称为绝对引用。
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How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（）
A. Traffic is switched from the first node receiving the AIS indication.
B. Traffic is switched from the far side of the failure, allowing handshaking to occur.
C. UPSR traffic is switched from the terminating node, BLSR traffic is rerouted from the originating node in the ring.
D. UPSR traffic is switched from the terminating node, circuit by circuit. BLSR traffic is rerouted from the last reachable node in the ring.
成年子女未按赡养费给付协议支付赡养费，应否按协议约定承担违约金的问题？
为避免破坏切换开关室的密封，应与主变本体内油分别抽真空注油。（）
A. 正确
B. 错误
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