皮皮学，免费搜题
登录
搜题
【简答题】
阿尔伯特. 爱因斯坦
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Students from a wide range of countries attend a professional exam: A questionnaire is sent to a selected number of students at the end of the exam which should be completed compulsorily. The samples ...
A.
Multi-stage
B.
Stratified
C.
Cluster
D.
Systematic
【单选题】Samples are provided by the buyer as the quality standard for the goods. In order to avoid future disputes over the quality of the goods, the seller usually first duplicates the samples and then sends...
A.
duplicate sample
B.
original sample
C.
counter sample
D.
sealed sample
【单选题】When each data value in one sample is matched with a corresponding data value in another sample, the samples are known as
A.
corresponding samples
B.
matched samples
C.
independent samples
D.
None of these alternatives is correct.
相关题目：