C. Spare parts and fragmentary material validation by purchasing personnel with the warehouse keeper quantity and relevant data validation.

备件和零星材料的验证由采购人员同库房保管员进行数量和相关资料的验证。

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It is only when the data of perception are very rich (not fragmentary) and correspond to reality (are not illusory) that they can be the basis for forming correct concepts and theories.

只有感觉的材料十分丰富(不是零碎不全)和合于实际(不是错觉)，才能根据这样的材料造出正确的概念和论理来。

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Then, three equivalent clustering algorithms are provided for the dataset with fragmentary samples, which decreases the influence of incomplete data on clustering.

提出样本目标值残缺情况下的三种等效聚类算法，可使残缺数据样本有效地参加聚类，减少样本数据残缺对聚类的影响；

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Then, three equivalent clustering algorithms are provided for the dataset with fragmentary samples, which decreases the influence of incomplete data on clustering.

提出样本目标值残缺情况下的三种等效聚类算法，可使残缺数据样本有效地参加聚类，减少样本数据残缺对聚类的影响；

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