A.4 B.3 C.2 D.1
A.無(wú)線資源點(diǎn) B.綜合資源點(diǎn) C.全業(yè)務(wù)資源點(diǎn) D.傳輸資源點(diǎn)
A.光纜 B.管道 C.ODF架 D.DDF架