下图为某种群在不同环境中的增长曲线模式图，图2为某细菌种群培养过程中的生长曲线模式图

在吸烟与某病关系的研究中，吸烟组的死亡率是5%，不吸烟组的死亡率是2%，吸烟的归因危险度是（）

A.2.5

B.0.4

C.30%

D.3%

E.无法计算

The year was 1932. Amelia Earhart was flying alone from North America to England in a small single—engined aeroplane. At midnight, several hours after she had left Newfoundland, she ran into bad weather. To make things worse, her altimeter (高度表) failed and she didn't know how high she was flying. At night, and in a storm, a pilot is in great difficulty without an altimeter. At times, her plane nearly plunged (冲) into the sea.

Just before dawn, there was further trouble. Amelia noticed flames (火焰) coming from the engine. Would she be able to reach land? There was nothing to do except to keep going and to hope.

In the end, Amelia Earhart did reach Ireland, and for the courage she had shown, she was warmly welcomed in England and Europe. When she returned to the United States, she was honored by President Hoover at a special dinner in the White House. From that time on, Amelia Earhart was famous.

What was so important about her flight? Amelia Earhart was the first woman to fly the Atlantic Ocean alone, and she had set a record of fourteen hours and fifty—six minutes.

In the years that followed, Amelia Earhart made several flights across the United States, and on each occasion (时刻) she set a new record for flying time. Amelia Earhart made these flights to show that women had a place in aviation (航空) and that air travel was useful.

71. Which of the following statements is NOT the difficulty which Amelia Earhart met in her flight from north America to England?

A. She was caught in a storm.               B. The altimeter went out of order.

C. Her engine went wrong.                 D. She lost her direction.

72. When Amelia Earhart saw flames coming from the engine, what did she do?

A. She did noth ing but pray for herself.

B. She changed her direction and landed in Ireland.

C. She continued flying.

D. She lost hope of reaching l and.

73. According to the passage, what was Ameli a Earhart’s reason for making her flights?

A. To set a new record for flying time.

B. To be the first woman to fly around the world.

C. To show that aviation was not just for men.

D. To become famous in the world.

74. Which of the following statements was NOT mentioned?

A. She was the first woman who succeeded in flying across the Atlantic Ocean alone.

B. She showed great courage in overcoming the difficulties during the flight.

C She was warmly welcomed in England, Europe and the United States.

D. She made plans to fly around the world.

75. Which of the following would be the best title for th e passage?

A. Amelia Earhart—First Across the Atlantic.

B. Amelia Earhart—Pioneer in Women’s Aviation.

C. A New Record for Flying Time.

D. A Dangerous Flight from North America to England.

下列关于Oracle数据库系统的表空间叙述中，不正确的是( )。

A．每个数据库分成一个或多个表空间

B．每个表空间只能创建一个数据文件

C．一个数据文件只能和一个数据库相关联

D．数据库表空间的总存储容量就是数据库的总存储容量

门脉高压的特异性表现是（）

A.腹腔积液

B.脾大

C.脾功能亢进

D.侧支循环开放

E.肝掌，蜘蛛痣

根据外商投资企业法律制度的规定，下列各项中符合规定灼是( )。

A．外商独资企业的组织形式只能是有限责任公司

B．中外合资经营企业的组织形式为有限责任公司，应设股东会

C．中外合资经营企业中外国合营者以货币出资时，只能用外币出资，不能用人民币出资

D．合营企业的董事会成员每届任期3年