单项选择题 A user’s workstation currently has four connected IDE devices. Which of the following could be added to the workstation to allow more ATA devices to be added to the workstation?（）

单项选择题 A user states that the wireless on their laptop was working when they where at home, however,now in the office no wireless connection can be made. Which of the following should the technician check FIRST?（）

单项选择题 Which of the following commands should Karen, a technician, use to examine and restoreprotected system files?（）