In this study, the problem how to use pr theory in the brand-building of the logistics industry was firstly discussed.

本文首次专门针对物流行业的品牌建设中对公关传播理论使用的问题进行研究。

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OBJECTIVE: Purpose to study the expression of P53 mutation protein, estrin receptor (er) and progestin receptor (pr) in mammary cancer and their relativity.

目的：探讨乳腺癌中P 5 3蛋白，雌激素受体(ER)，孕激素受体(PR)的表达及相关性研究。

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Objective To study the influence of abnormal PR interval on mitral regurgitation and left ventricular filling.

目的探讨异常PR间期对舒张期和收缩期二尖瓣返流的影响及对左心室充盈的影响。

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Objective To study the influence of abnormal PR interval on mitral regurgitation and left ventricular filling.

目的探讨异常PR间期对舒张期和收缩期二尖瓣返流的影响及对左心室充盈的影响。

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