在常用的传输介质中,带宽最宽、信号传输衰减最小、抗干扰能力最强的一类传输介质是( )
A. 双绞线
B. 光缆
C. 同轴电缆
D. 无线信道
在令牌总线和令牌环局域网中,令牌是用来控制结点对总线的()
A. 输速率
B. 传输延迟
C. 误码率
D. 访问权
altruismboosterdrasticfutile hale and heartyskepticalstaticinherent salient gregariousElderly people are not in a position to make ____ changes at this stage of their life.
altruismboosterdrasticfutile hale and heartyskepticalstaticinherent salient gregariousIt would be ____ to sustain his life when there is no chance of any improvement.