According to the principle of common good, you should choose actions that harm____________.
A. no one
B. the fewest people
C. anyone but you
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构成比的重要特点是各组成部分的百分比之和( )
A. 一定大于100%
B. 一定小于l00%
C. 一定等于100%
D. 一定等于0
E. 随资料而异
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
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