【单选题】关于生成树根端口的描述,下面哪个是正确的()
C.
根端口到根的距离有可能不是该网桥到根的最短路径
D.
每个网桥可以有多个根端口,这样在一个根发生故障时,另一个根能够继续转发报文
【单选题】— You haven’t lost the ticket, have you? — _________. I know it’s not easy to get another one at the moment.
【单选题】— What's your favorite subject? — ______. It's easy and interesting. [ ]
【单选题】关于生成树根端口的描述,下面哪个是正确的( )。
C.
根端口到根的距离有可能不是该网桥到根的最短路径
D.
每个网桥可以有多个根端口,这样在一个根发生故障时,另一个根能够继续转发报文
【单选题】()是指以债权人的合法权利因债务人不履行法定或约定的义务而受到的损失为保险标的,由债权人就债务人的信用向保险人投保的保险。
【单选题】Finding information in today’s world is easy.T
A.
15. Finding information in today’s world is easy.The is how you can tell if theinformation you get is useful or not. (天津) A.ability
【单选题】It's easy _____. We shouldn't _____. [ ]
A.
to have a flu; to be careful
B.
have a cold; be careless
C.
to get a cold; be careless