问题 填空题

已知数列{bn}的前n项和Sn满足bn=2﹣2Sn,则数列{bn}的通项公式bn=(    ).

答案

阅读理解

阅读理解。

     We drink tea every day. But more than three hundred years ago, most of the people in Europe (欧洲)

did not know anything about tea. Some people heard about it, but very few of them know what to do

with it.

     There is a story about an English sailor (水手) who went to countries in the east, the west and the

south. He went to India and China. One day he came home and brought some tea as a present for his

mother. She told her friends about the present and asked them to a "tea party". When her friends came

to the tea party, the old man offered (提供) the brown tealeaves (茶叶). The old woman's friends began

to eat them. Of course, nobody liked the tealeaves.

     At that time the sailor came in. He looked at the table and said, "What have you done with the tea?"

"I boiled (煮) it, as you said. " "And what did you do with tea?" "I threw it away, of course." answered

the old man.

     "Now you may throw away the leaves, too." said her son.

1.Most of the people in Europe _________.

A. drank tea every day 300 years ago

B. drink tea every day

C. know nothing about tea

D. like to eat tea leaves

2.One day the sailor brought his mother some tea from _________.

A. countries in the west

B. countries in the south

C. India or China

D. a tea shop in England

3.The sailor's mother asked her friends to her house, because ________.

A. the sailor told her to

B. she wanted to ask her friends what to do with the tea

C. she liked to show off (炫耀)

D. she wanted to sample the tea together with her friends

4.At the tea party, _________.

A. all the woman's friends spoke highly of the tea

B. nobody knew what to do with the tea

C. the woman offered her friends some dried (干的) tea

D. the woman gave her friends each a glass of tea water

5.What mistake did the woman make?

A. She boiled the tea.

B. She did as the sailor said.

C. She poured away the water.

D. She didn't throw away the tea leaves.

阅读理解

阅读理解

     American culture is unique because it is formed and developed under certain conditions.The major

factors contributing to the making of this flew nation and the forming of a new culture are the hard

environment, ethnic diversity(多民族) and plural religion, which is quite different from other nations in

the world.What is more, these elements are still influencing the American culture.

     The early immigrants who were English Puritans settled down in northeast part of America. From

1607 to 1892, frontiers were pushed further west.The frontiersmen looked for a land of rich resources

and a land of promise, opportunity and freedom.Actually they looked for a better life.So individualism

(个人主义), selfreliance, and equality of opportunity have perhaps been the values most closely

associated with the frontier heritage(遗产) of America.

     In history, people from different countries in the world rushed to America three times.They brought

their own culture to America and later on,different cultures were mixed together.Thus the unique

American culture is formed,a common cultural life with commonly shared values.

     The fundamental American belief in individual freedom and the fight of individuals to practice their

own religion is at the center of religious experience in the United States.The great diversity of ethnic

backgrounds has produced religious pluralism; almost all of the religions of the world are now practiced

in the United States.

     Nowadays, we can see the continual influence of the three elements in the current American society.

American family is typically parents and their unmarried children.Middleaged and elderly people generally do not live with their married children.The people in America have a very strong desire to start a new life

in a new place.Quite a number of people change residences every year.The average American moves

fourteen times in his lifetime.

1. American culture is unique because of the following factors EXCEPT________.

A. hard environment  

B. ethnic diversity

C. plural religion  

D. advanced modernization

2. We can learn from this article that________.

A. the frontiersmen left important society values for American culture

B. the early immigrants brought about the unique American culture

C. people in the world once rushed to America because of its unique culture

D. the American family members don't get along well with each other

3. What's the author's attitude towards American culture?

A. He is critical of it.  

B. He admires it very much.

C. He just states the facts.  

D. He looks down upon it.

4. What might be the most suitable title of this article?

A. The Immigrants in America

B. Why American Culture Is Unique

C. The Influence of American Culture

D. Plural Religion and American Culture