问题 单项选择题 A1/A2型题

在定群研究中暴露组发病率与非暴露组发病率的比值是()。

A.相对危险度

B.归因危险度

C.比值比

D.归因危险度百分比

E.人群归因危险度

答案

参考答案:A

解析:相对危险度(RR)也叫危险比(riskratio)或率比(rateratio),是暴露组发病率或死亡率与非暴露组发病率或死亡率之比,是反映暴露与发病(死亡)关联强度的最有用的指标。RR表明暴露组发病或死亡的危险是非暴露组的多少倍。RR值越大,表明暴露的效应越大,暴露与结局关联的强度越大。

阅读理解

阅读理解

       The famous Chinese mathematician(数学家) Hua Luogeng was born in Jintan County, Jiangsu

province in 1910. When he was young, life was very difficult for his family. Still, the boy took great

interest in maths. In the summer of 1931, he was fortunate(幸运的) enough to become an assistant

in the Math Department(系)  of  Qinghua University,  where he spent every moment he could find

working and studying,  and he finished his compulsory(必修的) math course all by himself in only

13 months! Between the years of 1936 and 1938, he was further studying in Cambridge University

in the U.K. In 1950, together with his family, he returned to China from the USA. He said,  "I'm

Chinese, and I'll do my best for my motherland." So he did. He devoted(贡献) all his life to the

math study and won the great fame(荣誉) for our country. He died for heart trouble in 1985 while

lecturing in Japan. People will always remember him as a great scientist.

1. Which of the following is not true?

A. Hua Luogeng is a famous Chinese mathematician.

B. Hua Luogeng died in China.

C. Hua Luogeng was born in Jingtan County.

D. Hua Luogeng comes from Jiangsu.

2. The word "assistant"in this passage means "____" in Chinese.

A. 帮手

B. 服务员

C. 助教

D. 教授

3. Hua Luogeng was ____ in 1937. Which of the following cannot be chosen?

A. in China

B. abroad

C. in Cambridge

D. in England

4. From the story we can guess that Hua Luogeng was born in ____.

A. a rich family  

B. a poor family

C. a mathematician family

D. a fortunate family

5. Hua Luogeng died for _____ in 1985.

A. cancer

B. heart trouble

C. accident

D. oldness

单项选择题