分组交换的具体过程可分为虚电路分组交换和______两种。
参考答案：数据报分组交换
机车沿线走行公里包括（）
A、本务机车公里
B、单机公里
C、重联机车公里
D、补机公里
E、辅助机车走行公里
What a table! I've never seen such a thing before.It is________it is long. [ ]
A. half not as wide as
B. wide not as half as
C. not half as wide as
D. as wide as not half
