单项选择题
A.K2(b6-b8) B.K2(b2-b10) C.K2(b5-b8) D.K2(b1-b5)
A.VC-12-TU-12-TUG2-TUG3-AU4-AUG-STM-1 B.C-12-VC-12-TU-12-TUG2-TUG3-VC-4-AU4-AUG-STM-1 C.C-12-TU-12-VC-12-TUG2-TUG3-VC-4-AUG-AU4-STM-1
A.VC-12和TU-12指针全部为“1” B.整个STM-N帧内除STM-N RSOH外全部为“1” C.整个STM-N帧内除STM-N RSOH和MSOH外全部为“1”