题目内容

So excited ________ that he couldn't say a word.

A. he seemed
B. did he seem
C. was he seeming
D. he did look

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Jimmy was so nervous that not a single word _______ down in the dictation.

A. he wrote
B. he was written
C. did he write
D. was he written

DR和BDR选举出来后,OSPF网络处于()状态。

A. exstart
B. full
C. loading
D. exchange

( )的OSPF分组可以建立和维持邻居路由器的比邻关系

A. 链路状态请求
B. 链路状态确认
C. Hello分组
D. 数据库描述

OSPF默认的成本度量值是基于()的

A. 延时
B. 带宽
C. 效率
D. 网络流量

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