右图曲线表示某自变量和因变量之间的关系。下列关系符合曲线含义的是() A.水进入细胞

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问题:

右图曲线表示某自变量和因变量之间的关系。下列关系符合曲线含义的是()

A.水进入细胞的速度与细胞内外浓度差之间的关系

B.酶促反应速度与酶浓度的关系

C.Aa连续自交子代中纯合子所占比例与自交次数之间的关系

D.一天中植物光合作用强度与时间变化之间的关系

考点:高中生物物质进出细胞的方式物质进出细胞的方式题库
题型:单项选择题

患者,主诉腹泻、粪便恶臭,无急腹痛发作。按要求收集3天粪便测定粪脂肪和抽空腹血测定血脂:TG4.9mmol/L,TC8.1mmol/L,HDL-C0.8mmol/L,LDL-C5.2mmol/L,粪便脂肪酸32mmol/24h(参考值<18)。该患者最可能的诊断为()

A.肠梗阻

B.胆道梗塞

C.病毒性肝炎

D.慢性胰腺炎继发混合型高脂血症

E.胃十二指肠球部溃疡

题型:单项选择题

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.

题型:单项选择题
下图是一正弦交变电流的电流图象.此正弦交变电流的频率和电流的有效值分别为(  )

A.5Hz,10A

B.50Hz,10A

C.50Hz,10 A

D.5Hz,10 A

题型:单项选择题

下列属于阴虚证临床表现的是()

A.呼吸急促

B.五心烦热

C.口渴饮冷

D.唇舌干燥

E.汗热味成而黏

题型:单项选择题

登机梯的收放()。

A.只能用电气方式进行。

B.可用电气和人工进行收放。

C.可由电气收放和人工收上。

D.只能用人工方式进行。

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