Methods Female college students were sampled by cluster sampling and investigated by using questionnaire survey on anonymous basis.
方法采用分层整群抽样方法，对调查对象进行无记名自填式问卷调查。
The electronic information enterprises in Fujian Province are taken as research targets. Samples are collected by using questionnaire as a data collection tool.
以福建电子信息企业为研究对象，利用调查问卷收集数据，并进行实证检验。
In this paper, the author takes a survey on pre-service and in-service mathematics teachers 'understanding of irrational Numbers by using questionnaire and interview.
本文通过问卷调查和访谈的方法对职前和在职数学教师关于无理数概念的理解进行了调查研究。
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