问题 问答题 简答题

晶体对称的特点?

答案

参考答案:

晶体的对称有以下特点:

1)所有晶体都是对称的

2)晶体的对称受格子构造的严格控制,即晶体对称的有限性

3)晶体的对称不仅表现在外部形态上,而且表现在性质上。

单项选择题 B1型题
阅读理解

阅读理解

     Frederic Francois Chopin, the famous composer and pianist,was born in Zelazowa Wola, Poland, on

February 22,1810, of a French father and a Polish mother. His father, Nicholas Chopin, was a French

tutor to many noble families, later accepting a position as a French teacher at

the Warsaw Lyceum.

     Although Chopin later attended the Lyceum where his father taught ,  his early training began at home. This included receiving piano lessons from his mother. By the age of six, Chopin was creating original

pieces, showing remarkable musical ability. His parents arranged for the young Chopin to take piano

instruction from Wojciech Zywny. When Chopin was sixteen, he attended the Warsaw Conservatory of

Music, directed by composer Joseph Elsner. Elsner, like Zywny, insisted on the traditional training

associated with classical music but allowed his students to investigate more original imaginations of the

romantic style as well.

      As often happened to the young musicians of both the Classical and Romantic Periods, Chopin was

sent to Vienna,the center of music that day. He gave piano concerts and then arranged to have his pieces

published by a Viennese publishing house there. While Chopin was in Austria,Poland and Russia were in

the apparent beginnings of war.He returned to Warsaw to get his things in preparation for a more

permanent move. While there, his friends gave him a silver goblet filled with Polish soil. He kept it always, as he was never able to return to his beloved Poland.

      News of the war in Poland inspired Chopin to write many sad musical pieces expressing his grief for " his" Poland. Among these was the famous " Revolutionary Etude". As the war continued in Warsaw and

then reached Paris, Chopin retired to Scotland with friends. Although he

was far beyond the reach of the revolution, his attitude of sorrow did not improve and he sank deeper

into a depression. Likewise, his health did not regain either.

     Chopin died at the age of 39 and was buried in Paris. His last request was that the Polish soil in the

silver goblet be cast over his grave.

1. Why do you think Chopin's friends gave him a silver goblet of soil?  

A. Because they wanted him to remember his motherland.

B. Because the silver goblet was expensive.

C. Because the soil could be used in his experiments.

D. We don' t know the reason from the passage.

2. What do you think of Chopin's last request before his death?  

A. He cared too much about his friendship with friends.

B. He liked the goblet very much.

C. He loved his motherland deeply.

D. He was interested in the soil in the goblet.

3. Which of the following is true about Chopin?  

A. He died and was buried in his motherland.

B. He hated his country so he left it.

C. He missed his motherland when he was abroad.

D. He enjoyed an active life.

4. What can we infer from the passage?  

A. Chopin never retumed to Poland.

B. Poland and Russia used to fight against with each other.

C. Chopin created his original pieces at the age of six.

D. Chopin died at an early age mainly because of his character.