一根电线截成相等的小段，段数与段长成什么比例请选择ABC8T.A/U,{2I6?-e1m,t(D3h-N(c5F5q.i;I'u5G-r5J(m
A．正-N(c5F5q.i;I'u5G-r5J(m
B．反-N(c5F5q.i;I'u5G-r5J(m
C．不成-N(c5F5q.i;I'u5G-r5J(m