Method Self-designed questionnaire survey was conducted among 95 chief nurses of cluster convenience sample.

方法采用整群方便样本，运用自设问卷对95名三甲医院主管护师进行调查。

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Another limitation is that brands for this study were not selected strictly on the basis of market share or to represent a broad range of tar yields, but rather were a convenience sample.

研究的另一个缺陷在于，研究所针对的烟草品牌并没有严格按照市场份额来挑选，或者说这些挑选的烟草品牌不足以代表不同的焦油含量。相反，这些烟草品牌全是简易样本。

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The methods of this thesis are literature and survey. The author selected two Suzhou Vocational Colleges as a sample through convenience sampling questionnaire.

论文运用文献法和调查法，选取苏州市的两所高职院校为样本，通过方便抽样发放问卷。

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Electronic Arts plans to put a sample of The Need for Speed Underground videogame on fountain drinks sold at BP convenience stores.

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