使用Windows提供的网络管理命令()可以查看本机的路由表,()可以修改本机的路由表。 使用Windows提供的网络管理命令()可以查看本机的路由表。
A. tracert
B. arp
C. ipconfig
D. netstat
查看答案
冠心病稳定型心绞痛合并高血压首选()
A. β受体阻滞剂
B. 利尿剂
C. a受体阻滞剂
D. 血管紧张素II受体阻滞剂
E. 钙通道阻滞剂
Although a given waveform may contain frequencies over a very broad range, as a practical matter any transmission system will be able to accommodate only a limited band of () . This, in turn, limits the data rate that can be carried on the transmission () . A square wave has an infinite number of frequency components and hence an infinite () .However, the peak amplitude of the kth frequency component, kf, is only 1/k, so most of the () in this waveform is in the first few frequency components. In general, any digital waveform will have () bandwidth. If we attempt to transmit this waveform as a signal over any medium, the transmission system will limit the bandwidth that can be transmitted. any digital waveform will have () bandwidth.
A. small
B. limited
C. infinite
D. finite
边界网关协议BGP的报文()传送。一个外部路由器通过发送()报文与另一个外部路由器建立邻居关系,如果得到应答,才能周期性的交换路由信息。 一个外部路由器通过发送()报文与另一个外部路由器建立邻居关系,如果得到应答,才能周期性的交换路由信息。
A. UpDate
B. KeepAlive
C. Open
D. 通告
杀毒软件报告发现病毒Macro.Melissa,由该病毒名称可以推断出病毒类型是(),这类病毒主要感染目标是() 这类病毒主要感染目标是()
A. EXE或COM可执行文件
B. WORD或EXCEL文件
C. DLL系统文件
D. 磁盘引导区