多选题Which two factors affect the speed of your DSL connection?（）Aline qualityBdistance from the COCbrand of xDSL modemDnumber of twisted-pair wires used
题目
多选题
Which two factors affect the speed of your DSL connection?（）
A
line quality
B
distance from the CO
C
brand of xDSL modem
D
number of twisted-pair wires used