在一张长8厘米,宽12厘米的长方形纸上画一个最大的圆,这个圆的直径是（）厘米

A.拓扑结构
B.带宽
C.吞吐量
D.时延

riter did not lern the truth untilher sister told herbout it B．her mother told herbout it C．her sister told her motherbout itA．her sister told her about itB．her mother told her about itC．her sister told her mother about it