试题与答案

聚类分析

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题型：名词解释

题目：

聚类分析

答案：

参考答案：

在栅格地图基础上，根据设定的聚类条件对原有数据进行有选择的信息提取，而建立新的栅格数据系统的方法。输出的结果是符合条件的新栅格系统，而不符合条件的区域则为空白。

考点：信息技术系统性应用地理信息系统（GIS）地理信息系统（GIS）题库
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题型：阅读理解

阅读理解。

     In 1989, an earthquake almost flattened (铲平) America, killing over 30,000 people in less than four minutes.

In the earthquake, a father left his wife safely at home and rushed to the school where his son was supposed

to be, only to discover (发现) that the building was as flat as a pancake.

     He was surprised at what he saw, but he suddenly remembered the promise (承诺) he had made to his son:

"No matter what happens, I'll always be there for you!" And tears began to fill his eyes. He began to think of the

place where his son's classroom might be. He rushed there and started digging through the ruins (废墟). As he

was digging, other parents tried to pull him off, saying, "It's too late! They are all dead! You can't help! Go home!

There is nothing you can do!" But he only replied, "Are you going to help me now?" And then he continued to dig

for his son, stone by stone. The policemen also tried to pull him off and asked him to go home. But he only replied,

"Are you going to help me now?" But everyone was sure it was over. No one helped. He went on alone to see if

his son was still alive, 8 hours… 12 hours… 36 hours… then, in 38th hour, he pulled back a big stone and heard

his son's voice. He screamed, "Armand!" He then heard, "Dad, it's me. I told the other kids not to worry. I told

them if you were alive, you'd save me and when you saved me, they'd be saved! You have promised

no matter what happens, you will always be there for me! You did it, Dad!"

     "Come out, boy!"

     "No, Dad! Let the other kids out first, because I know you'll get me! No matter

what happens, I know you will always be there for me!"

1. How long did the terrible earthquake last? [ ]

A. 8 hours

B. About four minutes

C. 36 hours

D. 38 hours

2. Why did others try to stop the father? [ ]

A. Because they thought what he did was useless.

B. Because they thought the father was foolish.

C. Because the policemen would save the children.

D. Because they didn't want to save the children.

3. What did the boy do when he heard his father's voice? [ ]

A. He believed his father.

B. He asked his father to save others first.

C. He cried loudly and couldn't say anything.

D. He got out without his father's help.

4. What's the main idea of the story? [ ]

A. East or west, home is the best.

B. Don't worry about anything.

C. Father's promise.

D. God will save you.
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