问题 单项选择题 B型题

选定暴露和未暴露于某因素的两种人群,比较其发病结局的差异,该研究方法属于()

A.筛查

B.普查

C.队列研究

D.生态学研究

E.病例对照研究

答案

参考答案:C

解析:筛查是医疗机构和研究人员运用快速的检查方法主动地从人群中发现无症状患者的措施,其目的是早期发现可疑患者,提供患病率资料。因此第1题选项A正确。生态学研究是在群体水平上研究因素与疾病之间的关系,即以群体为观察、分析单位,通过描述不同人群中某因素的暴露情况与疾病的频率,分析该因素与疾病的关系。因此第2题选项D正确。队列研究的基本原理是选定暴露于及非暴露于某因素的两组人群,随访观察一定的期间,比较两组人群某种疾病的结局。因此第3题选项C正确。

阅读理解

Classes resumed (恢复) Thursday for the students of a school in Newtown, Conn, where a gunman last month killed 20 children and 6 adults in the second-largest school shooting in U.S. history.

With their school still being treated as a crime scene, more than 400 students of Sandy Hook Primary School attended classes in neighbouring Monroe.

Returning students, teachers and administrators were met by a large police presence outside their new school. Several officers guarded the entrance and checked IDs of parents dropping off children.

Law-enforcement officers guarding the new school called it “the safest school in America.”

Students found the same chairs and desks, when possible. Their classroom walls were painted the same colours and hung with the same pictures. Other details, such as the location of bookshelves and cubby holes, were replicated (复制) as much as possible.

The school district said parents who wanted to be close to their children were welcome to visit and stay in classrooms or an auditorium.

Newtown superintendent Janet Robinson said officials would do their best to make the students feel at ease.

“We will be doing a normal day.” She said.

小题1:The students of Sandy Hook Elementary School resumed classes in a new school in Monroe because       .

A.their school fell down because of a natural disaster

B.the government needs to use the land of their school

C.their school is too small to hold more than 400 students

D.a shooting crime happened in their school and it was still treated as a crime scene小题2:Why do the law-enforcement officers call the new school “the safest school in America?

A. There are few policemen outside the new school.

B. The school has the newest classrooms and buildings.

C. Any adult who is near the new school needn’t be checked his ID.

D. There are some officers who guarded the entrance of the new school.

小题3:A lot of things in the new school were replicated as much as possible except       .

A.chairs and desks

B.classroom walls

C.the location of the fans and air conditioners

D.the location of bookshelves and cubby holes小题4:“… to make the students feel at ease.” The phrase “feel at ease” most likely means       .

A.feel at home

B.feel fresh and curious

C.feel happy and lucky

D.feel safe and relaxed小题5:Which of the following is NOT true according to the passage?

A.The students have resumed classes in a new school.

B.A shooting crime happened in an American primary school.

C.The officials will do their best to make the students feel at ease.

D.The school children’s parents are not allowed to stay with their children in school.

单项选择题