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问题 单项选择题

流行病学分析性研究中，暴露是指（）

A.指一个发病因素

B.指多个危险因素

C.指研究对象具有某种疑为与患病与否可能有关的特征或曾受到某种疑为与患病与否可能有关的因子的影响

D.指接触了危险因素

E.与所研究疾病的患者有密切接触

答案

参考答案：C

选择题

世界上跨经度最广的大洲是 [ ]

A、北冰洋

B、南极洲

C、欧洲

D、南美洲

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听力题

根据短文内容及所给的首字母写出单词（每空一词。共10小题，每小题1分，共10分）

A couple (夫妻) have a son and a daughter, and they are twins (双胞胎). They live in a t 小题1: near Nanjing. Their house is very small with only three rooms. No washing machine, and no f　小题2: to keep food in.

The twins are b　小题3:   students. They are in the n　小题4:   grade this year. They must do a lot of homework at home. But they don’t have a s　小题5: . They have to do their homework at the dining table. Every morning, they go to school on one bike. And when they are b小题6:　 from school, they do a lot of housework for their parents.

They live a hard life. But the family is always f 小题7:  of fun. They often sit on their old sofa and chat about school life and the children’s beautiful f　小题8: there. 

The family becomes famous b　小题9:  it donates(捐赠) 2, 000 yuan to Project Hope. When people ask them why they are so generous (慷慨的), the father always says, “We know h　小题10:  people feel when their children can’t go to school.”
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