Which two states are the port states when RSTP has converged?() blocking。 learning。 disabled。 forwarding。 listening。
泼水节
《空调列车服务质量规范》一人值乘多个车厢时,由()负责值守增开的车门。 乘务长。 列车长。 车站。 餐售人员。
种植屋面是指利用屋顶植草栽花,甚至种灌木、堆假山、设喷水形成了“草场屋顶”或屋顶花园,是一种生态型的节能屋面。
Refer to the graphic.Computer 1 is consoles into switch A.Telnet connections and pings run from thecommand prompt on switch A fail.Which of the following could cause this problem?() switch A dose not have a cdp entry for switch。 or router JAXB.switch A dose not have an IP address。 port 1 on switch A should be an access port rather than a trunk port。 switch A is not directly connected to router JAX。 switch A does not have a default gateway assigned。
关于消防应急照明和疏散指示系统应急照明集中电源检测项目,下列说法正确的是()。