问题 单项选择题

下列关于肾上腺嗜铬细胞瘤的说法哪项不正确()

A.常为圆或卵圆形实性肿块

B.较大肿块中央可坏死呈低密度

C.增强扫描无强化

D.少数具有钙化

E.少数可为较大的厚壁囊性肿块

答案

参考答案:C

解析:肾上腺嗜铬细胞瘤常为肾上腺区圆或卵圆形实性肿块,易发生坏死、囊变和出血,肿瘤有完整的包膜,增强检查,肿瘤有明显强化,其内低密度区无强化。C项错误。

单项选择题
阅读理解

阅读理解。

     When people hear a president speak, they seldom think about others helping to shape the presentation

(报告). Today, however, presidents depend on writers such as J. Terry Edmonds to help them communicate

(交流) effectively. Edmonds is the first African American ever to work as a full-time speechwriter for a U.S.

president; he is so the first African American to serve as director of speechwriting for White House. His is

an all-American story of success.

     Edmonds grew up in Baltimore, Maryland; his father drove a truck, and his mother worked as a waitress.

A great reader, Edmonds showed a gift for writing at his high School, Baltimore City College After graduating

in 1967 Edmonds went on to Morgan State University.

     Edmonds began his career in business, with jobs in public relations and communications. He joined the

world of politics as news secretary for his congressman (国会议员) from Baltimore During Bill Clinton's

presidency, he wrote speeches for Health and Human Services Secretary Donna Shalala and worked in a

number of job in the White House and in governmental departments President Clinton then appointed (任命)

him to the office of directory of speechwriting. Following the 2000 elections Edmonds returned to Morgan

State University as the school's special assistant to the president for 2001-2002.

1. Which of the following statements is TRUE according to the text?

A. Edmonds proved himself to be good at writing at high school.

B. Edmonds graduated from Morgan State University in 1967.

C. Edmonds was the first full-time speechwriter.

D. Edmonds served the White House after 2000.

2. Edmonds entered the world of politics first as _____.

A. news secretary for a Congressman

B. a speechwriter for President Clinton

C. news secretary in the White House

D. a speechwriter for Secretary Donna Shalala

3. The text is most likely to be found in a book about _____.

A. popular science

B. historical events

C. successful people

D. Political systems