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- 空间认识具有四个层次:感觉运动(Sensorimotor)的层次,它以行动的表象为依据;前运算期(Pre-operational)的层次,其基础是从记忆中获得的有关客观世界的知觉的映象-Spatial awareness has four levels: sensorimotor (Sensorimotor) level, which is based on the appearance of action the former operator of the (Pre-operational