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【单选题】
在定量包装商品包装的（），应有正确、清晰的净含量标注。净含量的标注由“净含量”、数字和法定计量单位（或者用中文表示的计数单位）三部分组成。A.
任意位置
B.
反面位置
C.
正面位置
D.
显著位置
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反馈参考答案：
举一反三
【单选题】Which of the following is not necessary for a random sample from a population of 15 individuals?
A.
Each individual in the population has a 1/15 probability of being selected
B.
The selection of one individual is independent of the selection of any other individual
C.
After 15 selections, each individual must have been selected exactly one time
D.
The individual obtained on any specific selection must be unpredictable
【判断题】In a sample of size 40, the sample mean is 15. In this case, the sum of all observations in the sample is ∑ Xi = 600.
A.
正确
B.
错误
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