单项选择题 Which of the following WLAN protocols is in the 5GHz band with a MAXIMUM data rate of 54Mbps?（）

单项选择题 A Windows XP Professional PC needs to be checked for compatibility before being upgraded toWindows Vista Business. Which of the following would be the BEST action to take before theupgrade?（）

多项选择题 Which of the following methods can be used to apply a file system to a hard drive partition?（）