熔断器熔体由铅锡合或（）等，低熔点材料制成，多用于小电流电路。
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行政相对人合法权益受到侵害是指存在客观的损害事实或现实损害的威胁。
A. 正确
B. 错误
生态旅游资源是开展生态旅游的物质基础，是生态旅游者感受生态体验的物质对象。
A. 正确
B. 错误
CRH2型动车组一、二级检修规程（暂行）规定的空调过滤网的更换清洗周期为（）天。
You need to configure the WLAN client utility on a new machine. Which two of the following are true regarding this utility？ （）
A. The Aironet Desktop Utility （ADU） can be used to enable or disable the adapter radio and to configure LEAP authentication with dynamic WE
B. In Windows XP environment， a client adapter can only be configured and managed with the Microsoft Configuration Manager.
C. The Microsoft Wireless Configuration Manager can be configured to display the Aironet System Tray Utility （ASTU） icon in the Windows system tray.
D. The Cisco Aironet Desktop Utility （ADU） and the Microsoft Wirelss Configuration Manager can both be enabled at the same time to setup WLAN client cards.
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