题目内容

流行病学研究内容的三个层次是

A. 观察性研究、实验性研究、理论性研究
B. 疾病、伤害、健康
C. 原理、方法、应用
D. 揭示现象、找出原因、提供措施
E. 描述分布、提出假设、验证假设

查看答案

搜索结果不匹配？点我反馈

更多问题

流行病学的研究范围是

A. 传染病
B. 地方病
C. 慢性非传染性疾病
D. 疾病和健康状况
E. 伤害

描述性流行病学与分析流行病学的区别在于

A. 在群体水平上研究疾病现象
B. 是否验证病因假说
C. 是否设立对照
D. 是否有人为干预
E. 是否以预防为主

Switzerland is a land well-known for its beautiful 1.___. When people think of Switzerland they often think of mountains and mountain 2._. But Switzerland is more than a land of mountains. It is a country of highly 3._ and hardworking people. The Swiss are able to produce goods that do not need huge amounts of 4._ materials. Most of the raw materials used in their industries are 5. from other countries. As Switzerland has no sea 6., it has to pay heavily for imported raw materials which have to be sent over long 7._. For this reason, the Swiss are interested only in producing precision products like watches, cameras, and other types of goods which make use of their skill and 8._. The well-known Swiss watch industry is a good example of this. Small 9._ of raw materials are used but a great deal of skill and 10. is needed to produce a little item with so many 11. __ parts.

【单选题】唐代诗人(------)所作的《走笔谢孟谏议寄新茶》,描述诗人饮茶一碗至七碗时的不同体验。“一碗喉吻润”“两碗破孤闷”“三碗搜枯肠”“唯有文字五千卷”。

A. 李白
B. 杜甫
C. 卢仝
D. 苏轼