问题 单项选择题

若给定一个超市的销售数据库,分析任意两种商品销售量之间的关系,这种数据挖掘属于

A.分类分析

B.聚类分析

C.关联分析

D.趋势分析

答案

参考答案:C

解析: 关联分析是从所有对象来决定哪些相关对象应该放在一起,分析物品之间的关联性,此种功能可用来确认交叉销售的机会以设计出更吸引入的产品群组。与之对应的分类分析是依照所分析对象的属性分门别类,加以定义,建立类组。聚类分析是把对象按照一定的法则(距离)来进行归类,进行划分。

填空题
阅读理解

When middle-aged Alex quit his job and made up his mind to become a self-employed writer, no one could tell for sure whether he would succeed or not. He found a cold storage room in a building, set up a used typewriter and settled down to work.

After a year or so, however, Alex began to doubt himself. He found it was difficult to earn his living by selling what he wrote. But Alex determined to put his dream to the test—even though it meant living with uncertainty and fear of failure. This is the shadowland (虚幻世界) of hope, and anyone with a dream must learn to live there.

One day Alex got a call,“We need an assistant, and we’re paying $6,000 a year.” $6,000 was real money in 1960. It would enable Alex to get a nice apartment ,a used car and more. Besides, he could write in his spare time. As the dollars were dancing in Alex’s head, something cleared his senses. He had dreamed of being a writer--full time. “Thanks, but no,” Alex said firmly and swiftly, “I’m going to stick it out and write.”

After Alex got off the phone, he pulled out everything he had: two cans of vegetables and 18 cents. Alex put the cans and cents into a paper bag, saying to himself, “There’s everything you’ve made of yourself so far. I’m not sure I ever felt so low.”

Finally his work was published in 1970.Instantly he had the kind of fame and success that few writers ever experience. The shadows had turned into focus of attention.

Then one day, Alex found a box filled with things he had owned years before. Inside was a paper bag with two cans and 18 cents. Suddenly he pictured himself working in that cold storage room. It reminds Alex, and anyone with a dream, of the courage and persistence(坚毅) it takes to stay the course(持续到底) in the shadowland.

小题1:Why did Alex give up his job?

A.Because he didn’t like the working conditions.

B.Because he couldn’t earn enough to make a living.

C.Because he wanted to be a full-time writer.

D.Because he felt he had no potential in his job.小题2:What did Alex express when he answered the call?

A.He refused the job offer.

B.He was willing to give them a hand.

C.He expected them to pay him more money.

D.He would write in his spare time.小题3:What kind of person is Alex?

A.determined

B.modest

C.shy

D.brave小题4:Which of the following can summarize the passage best?

A.Look before you leap

B.Two heads are better than one.

C.Hold on to your dream, and it will come true.

D.A bird in hand is worth two in the bush.