问题 单项选择题

不同安全级别的网络相连接,就产生了网络边界,以下哪一项不属于网络边界安全访问策略()。

A.允许高级别的安全域访问低级别的安全域

B.限制低级别的安全域访问高级别的安全域

C.全部采用最高安全级别的边界防护机制

D.不同安全域内部分区进行安全防护

答案

参考答案:B

阅读理解

One day an old man is selling (卖) a big elephant. A young man comes to the elephant and begins to look at it slowly. The old man goes up to him and says in his ear, “Don’t say anything about the elephant before I sell it. Then I will give you twenty dollars.”“All right,” says the young man. After the old man sells the elephant, he gives the young man twenty dollars and says, “Now, can you tell me how you found the elephant’s bad ears?”“I didn’t find the bad ears,” says the young man. “Then why are you looking at the elephant slowly?” asked the old man. The young man answers, “Because I have never seen an elephant before, and I want to know what it looks like.”

根据短文选择正确的答案

(  )11. ________  the elephant.

    A. The young man sells     B. The old man sells

    C. The two men sell        D. The old man buys

(  )12. The young man is looking at the elephant slowly.

He wants to find out ___________.

    A. which foot of the elephant is bad B. how heavy it is

    C. which ear of the elephant is bad D. what it looks like

(  )13. The young man   ______________.

    A. knows the elephant has bad ears B. wants to buy the elephant

    C. looks after the elephant D. gets some money from the old man

(  )14. The young man  ______________.

    A. is not interested in elephants B. knows what an elephant looks like

    C. has seen some elephants before D. has never seen an elephant before

(  )15. Hearing what the young man said, the old man will probably(很可能)be ____________.

    A. angry (生气)      B. happy     C. dangerous      D. hungry

问答题 简答题