单选题_____A openedB closedC openD close

题目
单选题
_____
A

opened

B

closed

C

open

D

close

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相似问题和答案

第1题:

当一个NCP处于()状态时,PPP将传输相应的网络层协议数据包。

A.Opened

B.Closed

C.EStablished

D.continue


参考答案:A

第2题:

18.

A.began

B.end

C.was open

D.was over


正确答案:D

第3题:

Hardly ______ the door when he rushed into the office.

A.I opened

B. did I open

C. I had opened

D. had I opened


参考答案:D

第4题:

A reply card is ( ) with this invitation for your convenience.

A、enclosed

B、closed

C、entered

D、covered


参考答案:A

第5题:

24______

A.enter

B.leave

C.open

D.close


正确答案:A

从上文“push the door with the word PUSH to go out of the building”可知“the door with the word PULL”是相反的

温馨提示:A 进入 B 离开 C 打开 D 关闭

第6题:

The workmen ______ down the old house and built a new one in its place.

A. put

B. closed

C. tore

D. broke


参考答案:C

第7题:

(23)

A.Update

B.KeepaliVe

C.Open

D.通告


正确答案:C
解析:通用的外部网关协议是边界网关协议(Border Gateway Protocol,BGP)第4版。运行这个协议的网关向对等实体(Peer)发布可以到达的AS列表。通过交换路由信息,网关可以建立所有AS的互连结构图,并根据路由决策算法对环路进行修剪。
  BGP4发布的路由信息是可到达网络的IP地址前缀,并支持CIDR技术,通过路由汇聚功能形成超级网络,以简化路由表,并提高转发速度。
  BGP4报文通过TCP连接传送,其报文类型有建立邻居关系的OPEN报文,对OPEN请求进行应答的KEEPALIVE报文,发送路由更新信息的UPDATE报文,以及通告路由错误的NOTIFICATl0N报文。
  BGP的有限状态机如下图所示,共有13个BGP事件,引起BGP协议机在6个状态之间转换。

第8题:

As the term is drawing _________, the students are busy preparing for their final exams.

A. to close

B. closed

C. to a close

D. close


参考答案:C

第9题:

Joe pushed the door ___ and went in quickly.

A.opened

B.open

C.opening

D.openly


正确答案:B

第10题:

Some people think no one can be ______ to SARS.

A、free

B、rid

C、open

D、immune


参考答案:D

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