A.以太網(wǎng)點(diǎn)對(duì)點(diǎn)協(xié)議 B.動(dòng)態(tài)主機(jī)設(shè)置協(xié)議 C.各種數(shù)字用戶環(huán)路的簡(jiǎn)稱 D.通用分組無線業(yè)務(wù)
A.等電壓 B.等電流 C.等電勢(shì) D.等電位
A.40mm B.80mm C.120mm D.160mm