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_________________ is common in butterflies,especially in tropical forests: some species occur predominantly in the canopy, others in the understory,wvith only a handful of species occupying both microhabitats.
- A.Competition
- B.Stratification
- C.Mimicry
- D.Socialization
- E.Perching
B显示答案
以上解析由 考满分老师提供。
