You are about to migrate a customer network to use a VSS. Which of these statements is true about a VSS? ()
A. The VSS switch must be the root bridge for all VLANs and is automatically designated
B. The VSS switch is defined in RFC 4318 as a managed object
C. The PAgP+ or LACP protocols are used to maintain the operational state of the VSS devices
D. A VSS interoperates with a virtual port channel
E. The 802.1Q or ISL protocols are used to maintain the operational state of the VSS devices
F. A VSS increases the size of the spanning-tree domai
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事件上报必须要满足Time To Trigger指示的时间段才能触发上报,否则UE不会上报。引入Time To Trigger也是用于防止抖动引起虚报。()需要考虑。
癫痫发作时间过长时,除用止痉剂外,应立即()
A. 给予甘露醇和地塞米松
B. 给予抗生素
C. 给能量合剂
D. 静脉滴注碱性液体
E. 静脉滴注10%葡萄糖酸钙
新型及其他车辆不能保证与接触网保持()mm安全距离时,禁止使用人力制动机。
A. 2000
B. 1800
C. 1600
D. 1420
全脊髓照射野,骶骨部应将骶孔包于野内。故该部位在布野时照射野宽度为多少()
A. 4M
B. 6M
C. 8M
D. 10M
E. 12M