单项选择题 宪法规定，被选为中华人民共和国主席、副主席必须年满（）

单项选择题 You would like to configure a fractional T1 interface on a channelized T3 controller with the following properties: Which set of configuration commands accomplishes this goal?（）

单项选择题 Which statement is correct regarding the Junos OS?（）