A Cisco Aironet 1020 controller-based access point has been connected to a Catalyst 3550-24 PWRSwitch. However， when it is powered up， the access point fails. What has caused this problem？（） ["access point does not support 802.11h","incorrect switch power supply","switch port is not enabled","switch does not support 802.3af","access point has not been initialized with the primary controller"]
种群中个体分布呈均匀分布的原因有（） ["种内竞争","优势种成均匀分布","地形均匀分布","自毒现象","林地内光斑镶嵌"]
You are creating a Windows Forms Application by using the .NET Framework 3.5.Your applciation will be used by a government depertment.You need to ensure that the application meets "accessibilty" requirements.Which three actions should you perform？（） ["Expose keyboard focus visually and programmatically.","Use the NeutralResourceLanguageAttribute attribute in the assembly.","Provide documented keyboard access to all application features.","Set all the colors to primary colors when the high contrast mode is on.","Display all user interface elements by using the system color scheme when high contrast mode is off.","Either display all visual cues or create sound effects for any information."]
公民实行计划生育，其（）等权益不受侵犯 ["生育权","人身权","财产权","法律救助"]
下列会造成论文退稿的有（）。 ["无创新型","文笔欠佳","范围狭窄","选刊不适"]
空椅技术
