帧模式封装的MPLS使用（）的标签空间。
A.基于平台
B.基于接口
C.基于链路
D.基于拓扑
参考答案：A
June 25, 2011 _______a very bright night in Nanshan Middle School that will never
_______from memory. Our school has made great breakthrough in the field of education.
A．see; faded
B．witness; fade
C．saw; fade
D．witnessed; faded
