比较两地区的肺癌死亡率时,进行率的标准化,其目的是( )
A. 使大的率变小
B. 使小的率变大
C. 使率能更好的代表实际水平
D. 消除资料内部构成不同的影响,使率具有可比性
E. 起加权平均的作用
查看答案
计算乙肝疫苗接种后血清学检查的阳转率,分母是( )
A. 乙肝易感人数
B. 平均人口数
C. 乙肝疫苗接种人数
D. 乙肝患者人数
E. 乙肝疫苗接种后的阳转人数
[音频]The speaker described three of the sculptures on page 23. One was not mentioned. Number the pictures from i to 3 in the order they were described.a peaceb Let Us Beats Swords into Ploughsharesc Non-violenced Spoonbridge and Cherry
[音频]Which of the following names is not an example of a place name?
A. John Hill
B. John Baker
C. Emma Bridges
Which of the following names is not an example of an occupational name?
A. Tailor
B. Peterson
C. Baker