什么是聚类分析?聚类分析的应用领域有哪些?

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什么是聚类分析?聚类分析的应用领域有哪些?

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       Einstein was born in 1879 in Germany. As a child he was slow to talk. But when he was 14 years

old, he became clever. He taught himself maths from text books. He studied hard because he wanted to

be a physicist (物理学家).

       In 1901, Einstein began teaching. In 1902, he went on with his study at the University of Zurich.

Several years later, he put forward (提出)his Theory of Relativity(相对论).

       To most people the Theory of Relativity is hard to explain. But once Einstein explained it very well

to a group of young students. He said:" When you sit with a good girl for two hours, you think it is only

a minute, But when you sit on a hot fire for a minute, you think it's two hours. That's relativity".

       Later Einstein went to America and never left there. His life ended at the age of 76.

1. Albert Einstein was born in _______.      

A. America    

B. England    

C. Germany    

D. Japan

2. As a child he was not so fast to_______.

A. learn maths        

B. learn to speak    

C. teach himself maths  

D. explain the theory

3. When he was a ______in Zurich, he put forward his famous Theory of Relativity.

A. student    

B. worker  

C. librarian    

D. teacher

4. It was   ____ for Einstein to explain the Theory of Relativity.

A. hard    

B. easy    

C. well    

D. difficult

5. Einstein died in America in ______.

A. 1955    

B. 1956      

C. 1954      

D. 1945

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我会填。(在每组词的后面再写一个类似的词)    

(       )面(       )方          (       )嘴(       )舌                                     

(       )口(       )声          (       )惊(       )怪                                

郁郁(       )(       )           结结(       )(       )                               

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下列各表达式中,错误的有()。

A.税前经营利润=销售收入-销售成本-营业税金及附加-财务、管理费用

B.净经营资产=净经营性营运资本+净经营性长期资产

C.净经营资产=经营性流动资产-经营性流动负债

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A.重大过失;可以

B.过失;可以

C.重大过失;应当

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