Abstract: Associations and relationchips between individual, objective and practiceare manifested in human dayly activities, and these formed some specialcontradiction; that is, as the author take it, the contradiction-unity betweenmental and conscious activities which act most actively in actual activities,and the real activities. In the point of view of practice, the relations ofpsychological processes and actual activities should be wholly investigatedand studied in the respect of regularity. The natures, structures and mech-anisms underlying human life activities are also studies in this paper.

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