为了限制路由信息传播的范围，OSPF协议把网络划分成4种区域(area

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问题单项选择题

为了限制路由信息传播的范围，OSPF协议把网络划分成4种区域(area)，其中______的作用是连接各个区域的传输网络，______不接收本地自治系统之外的路由信息。

A．不完全存根区域

B．标准区域

C．主干区域

D．存根区域

答案

参考答案：C

填空题

请根据句意，用括号内所给单词的适当形式填空。

1．Have you ever seen any _________ (clone) animals?

2．Mr. Li _________ (1ive) in the village since he moved here three years ago.

3．If I _________ (am) you, I would go to France with him.

4．The little girl traveled from New York to London by________ (she).

5．They would like _________ (stay) at home on Sunday.

6．Do you know anything about _________ (Canada)culture?

7．The two words are spelled _________ (different), but they have the same pronunciation.

8．Which is more important, __________ (say) something or doing it?

9．Birthday cakes are a ________ (tradition) part of birthday parties.

10．Yesterday was my birthday. I received lots of ________ (gift) from my friends.

单项选择题 A型题

Horner综合征的主要病因是（）

A.Müller肌损伤

B.交感神经损伤

C.提上睑肌发育不全

D.提上睑肌损伤

E.副交感神经损伤