集元赚真的能赚钱吗:做一下选择题
来源:百度文库 编辑:高考问答 时间:2024/05/07 07:39:46
Which ISDN device converts the four-wire BRI signals from an S/T interface into the two-wire signals of a U interface?
A.TE1
B.NT-2
C.TA
D.TE2
E.NT-1
A.TE1
B.NT-2
C.TA
D.TE2
E.NT-1