Which of the following statements are true regarding Layer 3 switches?(Choose all that apply.)()
A routed port does not run STP or DTP
B. A routed port is considered to be in a down state if it is not operational at both Layer 1 andLayer 2
C. An SVI is considered to be in a down state if it is not operational at both Layer 1 and Layer 2
D. An SVI is considered to be in a down state only when none of the ports in the correspondingVLAN are active
E. An SVI port does not run 5TP or DTP
F. To create a trunk, an SVI can be logically divided into subinterface
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1984年9月1日,市长齐振瑛发表贺信,祝贺长沙第一所老年病医院成立,这所医院的前身叫什么名字?
男,60岁,煤气中毒1天后来院,深昏迷,休克、尿少、血COHb60%,此急性一氧化碳中毒的病情属()
A. 轻度中毒
B. 中度中毒
C. 重度中毒
D. 极度中毒
E. 慢性中毒
发电机和电力网并列运行的条件是()。
A. 发电机的端电压与电网的电压相等,相位相同
B. 发电机的端电压与电网的电压相等,相位可以不同
C. 发电机的端电压频率与电力网频率相同
D. 两者相序一样