问题 解答题

如图为肌肉协作示意图,据图回答:

(1)a,b分别叫做______和______,主要由______和______两部分组成.

(2)当上肢处于屈肘状态时,______收缩,______舒张.

(3)当你垂直伸臂提一桶水时,a处于______状态,b处于______状态.

(4)与骨相连的肌肉总是由______相互配合活动的.

根据自身体验,仔细观察图,分析在屈肘和伸肘动作,骨、骨骼肌和关节的相对位置,想一想,运动中骨起______作用,骨骼肌为运动提供______,关节是运动的______,______起调节作用.

答案

(1)由肌肉协作示意图可知:a表示肱二头肌,b表示肱三头肌.一块骨骼肌是由肌腱和肌腹构成.肌腱是指骨骼肌两端呈白色的部分,肌腹是指中间鼓起的部分.

(2)骨骼肌有受刺激而收缩的特性,当骨骼肌受神经传来的刺激收缩时,就会牵动骨绕着关节活动,于是躯体就会产生运动.屈肘时,肱二头肌收缩,肱三头肌舒张.

(3)当垂直伸臂提一桶水时,这时肱二头肌和肱三头肌必须同时收缩才能将水桶提起,

(4)骨骼肌只能收缩牵拉骨而不能推开骨,因此与骨相连的肌肉总是由两组肌肉相互配合活动的.在运动中,神经系统起调节作用,骨起杠杆的作用,骨骼肌起动力作用,关节起支点作用,.

故答案为:(1)肱二头肌;肱三头肌;肌腱;肌腹;(2)肱二头肌;肱三头肌;(3)收缩;收缩;(4)两组肌肉;杠杆;动力;支点;神经系统.

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.

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