单项选择题 After installing the Windows operating system, Device Manager shows a number of devices with a yellow question mark next to them. Which of the following is the MOST likely reason?（）

单项选择题 Which of the following commands will allow remote use of a folder?（）

单项选择题 Which of the following is an advantage of a 100Base-T network card versus an 802.11g wireless network card?（）