TDMA复帧(Multi frame)-多个TDMA帧构成复帧,其结构有两种:( )复帧和( )复帧

TDMA复帧(Multi frame)-多个TDMA帧构成复帧,其结构有两种:( )复帧和( )复帧

A.25

B.26

C.50

D.51

正确答案是BD