网桥(Bridge)是______的互连设备。

网桥(Bridge)是 ______ 的互联设备。

网桥与中继器相比能提供更好的网络性能，原因是（）。

网桥与中继器相比能提供更好的网络性能，原因是(6)。

网桥与中继器相比能提供更好的网络性能，原因是_______。

标记环网使用______类型的网桥。

标记环网使用_______类型的网桥。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

Duty is an act or a course of action that people ______you to take by social customs, law or religion.

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.

根据路径选择算法网桥可以分为（）和（）两种。