(1) "Pain" and "Fast" are opposites. (1) Different people have different feelings about "pain" and "quickness" at different times and in different aspects. ( 1)

(2) "Pain" and "Fast" are unified, (1) they are interdependent and penetrate each other, under certain conditions.

Mutual transformation. (2 points)

Test analysis: The principle of this question is clear, and it answers the viewpoint of unity of opposites from two aspects, namely, the identity and struggle of contradictory statements. Attention should be paid to analyzing the unity of opposites between "pain" and "quickness" in cities.