用72分米长的铁丝围成一个长方形，长方形的长和宽的比是5：4，这个长方形的面积是

主要作用于革兰阴性菌的半合成青霉素是（）

A.青霉素V

B.哌拉西林

C.匹氨西林

D.美西林

E.双氯西林

阅读理解

     In December, 2010, many American newspapers publish a list of the best books of the year.

Freedom by Jonathan Franzen is one of the most repeatedly praised books on this year's list of

favorites. It tells about the ups and downs of the Berglund family over many years. Mr. Franzen fills the

book with sharp

observations about American politics, culture and society.

     Jennifer Egan's book A Visit from the Goon Squad takes place in 13 chapters over 40 years. The

story moves back and forth in time, from different viewpoints. One main character is former rock

musician Bennie Salazar who works for a record company. The other main character is a troubled

young woman named Sasha who works for Bennie. The reader learns about their pasts and those of their

friends.

     The main character in The Imperfectionists by Tom Rachman is a failing English Language newspaper published in Rome, Italy. Each chapter of the book tells about a reporter or editor working for this paper. Their stories are filled with intelligence and great personality.

     Two of the most popular nonfiction books of 2010 were about rock and roll stars. Just Kids is by

rock singer Patti Smith.It tells about her friendship with the artist Robert Mapplethorpe in the 1960s and

1970s before they became famous. Life is the autobiography of Rolling Stones guitarist Keith Richards. It

is an honest and exciting look at the development of rock and roll and the wild times this famous band has experienced.

     Unbroken by Laura Hillenbrand tells about a man named Louis Zamperini. She tells about his

extraordinary survival story after his plane crashed into the Pacific Ocean during Would War Two.

     Stacy Schiff has received great praise for her book Cleopatra: A Life. It tells about one of the most

misrepresented and famous women in his story, Cleopatra. She ruled ancient Egypt about 2,000 years

ago.One critic said Ms. Schiff has brought Cleopatra to life again by unearthing her story from centuries

of lies.

1. How many books are mentioned in the passage?

A. 5.  

B. 6.  

C. 7.  

D. 8.

2. The following books are related to music EXCEPT________.

A. A Visit from the Goon Squad

B. The Imperfectionists

C. Just Kids

D. Life

3. If your major is the history of ancient Africa, you may pay attention to ________.

A. Freedom by Jonathan Franzen

B. Unbroken by Laura Hillenbrand

C. Cleopatra: A Life by Stacy Schiff

D. The Imperfectionists by Tom Rachman

4. Which book will give you a practical understanding of the USA?

A. Freedom.

B. Cleopatra: A Life.

C. Life.

D. A Visit from the Goon Squad.

5. The last sentence of the passage implies that ________.

A. Stacy Schiff is an archaeologist

B. Stacy Schiff tells a story about an imaginary Egyptian queen

C. the critic speaks highly of Cleopatra in history

D. the critic finds the character in the book very real

物流时效是指从下单开始计算到收到货物为止这段时间。

某算法的语句执行频度为（3n+nlog2n+n2+8），其时间复杂度表示（）。

A.O（n）

B.O（nlog2n）

C.O（n2）

D.O（log2n）

反映收入利润率的指标主要有（）等。

A.营业收入毛利率

B.营业收入利润率

C.总收入利润率

D.销售净利润率

E.销售息税前利润率