1. Perceptual stereotype reflects the role of A understanding in perception, the relationship between B object and background, the relationship between C whole and part, and D constancy. The answer to this question is that when the book talks about selectivity, there is a perceptual stereotype. Personally, I feel that the answer to this question is still far-fetched. 2. "Rebirth after death" embodies the positive enhancement of A emotion, the negative reduction of B emotion, the health care function of C emotion and the incentive function of D emotion. Students are afraid of math teachers and math classes because they can't answer math questions correctly. Which of the following psychological principles can explain this phenomenon? A, operant conditioned reflex b, differentiation of conditioned reflex c, classical conditioned reflex d and secondary conditioned reflex. Is this a generalization of classical conditioning? 4. Ausubel's meaningful learning types include A representation learning, B concept learning, C rule learning and D proposition learning. This topic can be found in Chen Qi's book.