单项选择题
A.MAC B.Home RF C.WEP D.TDMA
A.线对l B.线对2 C.线对3 D.线对4
A.光纤模场直径不一致 B.两根光纤芯径失配 C.纤芯截面不圆 D.纤芯与包层同心度不佳
A.1000mm B.1500mm C.1800mm D.2000mm
微信扫一扫,加关注免费搜题
