下列叙述哪项是正确的（） ["控制室、电气控制台、电气控制柜的设计和电气设备、电器元件的安装位置应方便人员操作、维护和检修，控制按钮应有明显的识别标志、信号灯；","控制柜、操作台、导线保护管等不得使用易燃材料制作；","控制柜、操作台内保持清洁，不得堆放任何杂物；","以上都正确。"]
What are three common reasons for ATM CRC errors？（） ["Incorrect VPI and VCI configuration","Noise， gain hits， or other transmission problems on the data link equipment","ATM cells are dropped due to incorrect ATM routing in the service provider.","A faulty or failing ATM interface.","Cells are dropped due to traffic policing in the ATM cloud on one or more virtual circuits attached to theATM interface"]
Which statement about access lists that are applied to an interface is true?（） [" you can apply multiple access lists with the same protocol or in different direction."," you can config one access list,per direction,per layer 3 protocol"," you can place as many access lists as you want on any interface"," you can apply only one access list on any interface"]
《一千零一夜》的第一个故事主人公的身份是？（） ["商人","农民","王后","诗人"]
What are two QoS mechanisms that are used to prevent packet loss？（） ["header compression","payload compression","low latency queuing （LLQ）","weighted random early detection （WRED）","traffic policing","traffic shaping"]
作为一名幼儿园教师应该持有怎样的儿童观和儿童教育观？
