工作于比网络层高的层次上的互联设备称为（）。
A.路由器
B.中继器
C.网桥
D.网关
参考答案：D
Once he starts talking about Chinese or foreign affairs, ancient or modern, ______
A．there is no stopping of him
B．he is not to stop
C．there is no stopping him
D．it is no stopping him
《千金方》中主治蓄血证的方剂是
A．利湿退黄B．活血散瘀C．清热泻火D．泻下通腑E．凉血止血
