单项选择题
Which of the following commands is used to delete an empty directory?（）
A.RD B.EDIT C.DIR D.FORMAT
单项选择题 Which of the following is the default SMTP port?（）
单项选择题 Which of the following tools would a technician use to map a drive to a user’s machine?（）
单项选择题 When updated, which of the following will allow network access to new users?（）
