问题 填空题

一台主机的IP地址为10.1.1.100,屏蔽码为255.0.0.0。现在用户需要配置该主机的默认路由。如果与该主机直接相连的唯一的路由器具有2个IP地址,一个为10.2.1.100,屏蔽码为255.0.0.0;另一个为11.1.1.1,屏蔽码为255.0.0.0,那么该主机的默认路由应该为______。

答案

参考答案:10.2.1.100

解析: 由于路由器具有两个IP地址,主机IP地址为10.1.1.100,屏蔽码为255.0.0.0,故其网络地址为10,而11.1.1.1的网络地址为11,10.2.1.100的网络地址为10,与主机的网络地址相同,故默认路由为10.2.1.100。

读图填空题
阅读理解

阅读理解。

     "Have a nice day!" may be a pleasant gesture or a meaningless. When my friend Maxie says "Have a

nice day" with a smile, I know she sincerely cares about what happens to me. I feel loved and secure since another person cares about me and wishes me well.

    "Have a nice day. Next!" This version of the expression is spoken by a salesgirl at the supermarket who is rushing me and my groceries out the door. The words come out in the same tone (腔调) with a fixed

procedure. They are spoken at me, not to me. Obviously, the concern for my day and everyone else's is

the management's attempt to increase business.

    The expression is one of those behaviors that help people get along with each other. Sometimes it

indicates the end of a meeting. As soon as you hear it, you know the meeting is at an end. Sometimes the

expression saves us when we don't know what to say "oh, you may have a tooth out? I'm terribly sorry,

but have a nice day."

    The expression can be pleasant. If a stranger says "Have a nice day" to you, you may find it

heart-warming because someone you don't know has tried to be nice to you.

    Although the use of the expression is an insincere, meaningless social custom at times, there is nothing

wrong with the sentence except that it is a little uninteresting. The salesgirl, the waitress, the teacher, and all the countless others who speak it without thinking may not really care about my day. But in a strange and

comfortable way, it's nice to know they care enough to pretend they care when they really don't care all

that much. While the expression may not often be sincere, it is always spoken. The point is that people say it all the time when they like.

1. How does the author understand Maxie's words?

A. Maxie shows her anxiety to the author.

B. Maxie really wishes the author a good day.

C. Maxie encourages the author to stay happy.

D. Maxie really worries about the author's security.

2. What does the underlined sentence in Paragraph 2 mean?

A. The salesgirl is rude.         

B. The salesgirl is bored.

C. The salesgirl cares about me.   

 D. The salesgirl says the words as a routine

3. By saying "Have a nice day," a stranger may _____.

A. try to be polite to you          

B. express respect to you

C. give his blessing to you        

D. share his pleasure with you

4. According to the last paragraph, people say "Have a nice day"_______.

A. sincerely          

B. as thanks    

C. as a habit    

D. encouragingly

5. What is the best title of the passage?

A. Have a Nice Day-a Social Custom.

B. Have a Nice Day-a Pleasant Gesture.

C. Have a Nice Day-a Heart-warming Greeting.

D. Have a Nice Day-a Polite Ending of a Conversation.