题目内容

流行病学研究中由果到因的研究方法是

A. 现况调查
B. 队列调查
C. 现场试验
D. 病例对照调查
E. 社区试验

查看答案
更多问题

Room 504, Xiamen HotelXiamenMarch 15th, 2005Dear Sir or Madam,I arrived in Xiamen from Nanjing this morning by Express Train No. 25. At the Nanjing station I registered a mink, but when I went to your luggage office to draw it this afternoon, I was told it was missing. The check I hold is No. 100694. I shall be very much obliged if you will kindly trace the missing article at once, as there are in it many important things, of which I am in urgent need. My trunk bears my personal name "James White". I am now staying in Room 504, Xiamen Hotel. If you have retrieved it, please inform me soon or contact me by calling 8765432.Thanks!James White Where does he register his trunk At()

下面不属于混杂偏移控制方法的是

A. 限制
B. 匹配
C. 重复
D. 随机化
E. 统计处理

Room 504, Xiamen HotelXiamenMarch 15th, 2005Dear Sir or Madam,I arrived in Xiamen from Nanjing this morning by Express Train No. 25. At the Nanjing station I registered a mink, but when I went to your luggage office to draw it this afternoon, I was told it was missing. The check I hold is No. 100694. I shall be very much obliged if you will kindly trace the missing article at once, as there are in it many important things, of which I am in urgent need. My trunk bears my personal name "James White". I am now staying in Room 504, Xiamen Hotel. If you have retrieved it, please inform me soon or contact me by calling 8765432.Thanks!James White What is the number of the check he holds()

Room 504, Xiamen HotelXiamenMarch 15th, 2005Dear Sir or Madam,I arrived in Xiamen from Nanjing this morning by Express Train No. 25. At the Nanjing station I registered a mink, but when I went to your luggage office to draw it this afternoon, I was told it was missing. The check I hold is No. 100694. I shall be very much obliged if you will kindly trace the missing article at once, as there are in it many important things, of which I am in urgent need. My trunk bears my personal name "James White". I am now staying in Room 504, Xiamen Hotel. If you have retrieved it, please inform me soon or contact me by calling 8765432.Thanks!James White Which train does he take()

答案查题题库