电力生产事故调查的任务是贯彻安全第一、预防为主的方针，总结经验教训，研究电力生产事故（），采取预防措施，防止和减少电力生产事故的发生。
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An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? （）
A. The switch must be configured with an IP address, subnet mask, and default gateway.
B. The switch must be connected to a router over a VLAN trunk.
C. The switch must be reachable through a port connected to its management VLA
D. The switch console port must be connected to the Ethernet LA
E. The switch management VLAN must be created and have a membership of at least one switch port.
F. The switch must be fully configured as an SMTP agent.
舌诊属于中医四诊的（）
A. 望诊
B. 闻诊
C. 问诊
D. 切诊
通常GPS装置中同步信号IRIG-B（AC）码可以有（）电接口类型。
A. TTL
B. RS-485
C. 20mA电流环
D. AC调制
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