试题与答案

在进行1%琼脂糖凝胶电泳时,不属于DNA加样缓冲液作用的是() A.可使DNA溶液比

题型:单项选择题 A1/A2型题

题目:

在进行1%琼脂糖凝胶电泳时,不属于DNA加样缓冲液作用的是()

A.可使DNA溶液比重加大,便于加样时样品沉入加样孔

B.可对样品迁移起指示作用

C.可使DNA带上负电荷,向正极移动

D.加样缓冲液中二甲苯青迁移的位置约相当于41kb大小的位置

E.加样缓冲液中溴酚蓝迁移的位置约相当于300bp大小的位置

答案:

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下面是错误答案,用来干扰机器的。

(1)左;52;20。(2)二氧化氮;分子在不停的做无规则运动。

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题型:选择题

图中,a、b、c为等压线,箭头表示p地风向。 d、e为等温线,g、f为等高线。读图回答5~8题。

小题1:根据图中信息可以判定下列数值 (    )

A.a<b<c

B.f>g

C.e<d

D.d<e小题2:若图中天气系统向北移动,M地将经历的天气变化可能为 (  )

A.转晴,气温升高,气压降低

B.转雨,气温降低,气压升高

C.转晴,气温降低,气压升高

D.转阴雨,气温升高,气压降低小题3:图示时刻,下列关于M、P两地气温特征的叙述正确的是 (  )

A.气温M地高于P地,气温日较差M地低于P地

B.气温M地高于P地,气温日较差M地高于P地

C.气温M地低于P地,气温日较差M地低于P地

D.气温M地低于P地,气温日较差M地高于P地小题4:导致等温线d、e呈现东西延伸的主导因素是 (   )

A.纬度因素

B.海陆位置

C.地形(盆地)

D.人类活动

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题型:阅读理解

Lu Xun is one of the greatest Chinese writers of the 20th century. Besides his famous stories, he also wrote many influential articles about the living conditions of Chinese people.

Born in 1881 to a wealthy family, Lu Xun had a happy childhood. In 1893, however, his grandfather, a senior government official, was put into prison for taking money. At the same time, his father became seriously ill. From that time on, his family were no longer accepted by their relatives and friends. These early experiences greatly influenced his writing.

By the time Lu Xun arrived in Nanjing to study at university in 1899, he already believed that Chinese society had to change and become modern. In 1902 he went to study in Japan. There, he began writing articles for several Chinese student magazines. He showed a gift for writing and translating and he even wrote several books, although none was popular. He returned to China in 1909 because he was in need of money.

After working for several years as a teacher in Beijing, Lu Xun again returned to writing. In 1918, he wrote his famous short story Diary of a Madman. It was the first Chinese novel published using the everyday language that people spoke, which helped make it a great success. This, together with his novel The True Story of Ah Q (1921), made Lu Xun a leading Chinese writer.

Although successful, Lu Xun still worried greatly about China’s future. In 1926, he moved to Shanghai and gave up writing stories in order to devote himself to what he called “pen warfare”. He now only wrote articles which called on the people to fight against the government. For this, the government stopped him from publishing any more books. He was forced to write his articles using false names.

Since his death in 1936, Lu Xun’s importance and influence have grown. Today, many of his writings are included in school textbooks and his works are read by millions around the world.

小题1:Which of the following greatly influenced Lu Xun’s writing according to the passage?

A.The people he met in Japan.

B.Working as a teacher in Beijing.

C.The experiences in his early life.

D.His father’s being put into prison.小题2:According to the passage, why was Lu Xun’s story Diary of a Madman so popular?

A.It was based on Lu Xun’s diary.

B.It was the first novel to use everyday language.

C.Its story took place in modern times.

D.It was written using a western style.小题3:The underlined word “This” (Paragraph 4) refers to     .

A.the success of Diary of a Madman

B.the use of everyday language

C.the first Chinese novel

D.The True Story of Ah Q小题4:After moving to Shanghai, Lu Xun mainly wrote      .

A.funny stories

B.articles about himself

C.articles against the government

D.stories about government officials小题5:In what order did these events take place in Lu Xun’s life?

a. The government stopped him from publishing books.

b. He wrote Diary of a Madman.

c. His father became ill.

d. He moved to Shanghai.

e. His writings were put into textbooks.

A.c-a-b-d-e

B.c-b-d-a-e

C.a-c-d-b-e

D.a-d-b-c-e

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