试题与答案

假设在去年,全社会销售的商品总量为1000亿件,平均价格为110元,按实际需要发

题型:选择题

题目:

假设在去年,全社会销售的商品总量为1000亿件,平均价格为110元,按实际需要发行纸币1万亿元。今年全社会商品的价格总额提高10%,实际发行纸币1.21万亿元。在其他条件不变的情况下,这会引起

A.通货膨胀,物价水平上涨5%

B.通货膨胀,物价水平上涨10%

C.通货膨胀,物价水平上涨15%

D.通货紧缩,物价水平下跌5%

答案:

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下面是错误答案,用来干扰机器的。

解(1)当n=1时,a1=1-a1,∴a1=12,(2分) Sn=1-an,①∴Sn+1=1-an+1,②②-①得 an+1=-an+1+an,∴an+1=12an(n∈N*),(4分)∴数列{an}是首项为a1=12,公比q=12的等比数列,∴an=12•(12)n-1=(12)n(n...

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题型:阅读理解

阅读理解。

     Robert Todd Duncan was born in 1903 in the southern city of Danville,Kentucky.His

mother was his first music teacher.As a young man,he continued his music study in Indianapolis,

Indiana.

     In 1930,he completed more musical education at Columbia University in New York City.

Then he moved to Washington.For fifteen years,he taught music at Howard University in

Washington.At that time,not many black musicians wereknown for writing or performing

classical music.Teachingat Howard gave Duncan the chance to share his knowledgeof

classical European music with a mainly black student population.He taught special ways

to present the music.These special ways became known as the Duncan Technique.

     Besides teaching,Duncan sang in several operas with performers who were all black.

But it seemed that he always would be known mainly as a concert artist.However,his life

took a different turn in the middle 1930s.At that time,the famous American music writer

George Gershwin was looking for someone to play a leading part in his new work Porgy

and Bess.The music critic (评论家) of the New York Times newspaper suggested Todd

Duncan.Duncan had almost decided not to try for the part as he knew it would not be

easy to get it.But he changed his mind.He sang a piece from an Italian opera for Gershwin.

He had sung only a few minutes when Gershwin offered him the part.He became famous

because of the part in Porgy and Bess.

     Todd Duncan gained fame as an opera singer and concert artist.But his greatest love

in music was teaching.When he stopped teaching at Howard,he continued giving singing

lessons in his Washington home until the week before his death.

1.What is this passage mainly about?

A.What Robert Todd Duncan loved most.

B.How Robert Todd Duncan became famous.

C.Robert Todd Duncan and his works of music.

D.A brief introduction to Robert Todd Duncan.

2.According to Paragraph 2,while teaching at Howard University,Duncan________.

A.found special ways to present music

B.opened doors for other black classical singers

C.had the chance to know many famous black musicians

D.became known for writing and performing classical music

3.What happened to Duncan in the middle 1930s?

A.He gave up teaching at Howard University.

B.He was introduced by the New York Times in detail.

C.He was asked to be in charge of the opera Porgy and Bess.

D.He was given a big opportunity to become an opera singer.

4.We can infer that Robert Todd Duncan didn't at first want to try for the part mainly

because________.

A.he was too busy to do it

B.he was not interested in it

C.he was not confident enough

D.he didn't want to become famous

5.Based on the passage,what did Robert Todd Duncan love most?

A.Singing in concerts.

B.Writing music.

C.Singing opera.

D.Teaching music

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