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题目内容
Some paleontologists debate whether the diversity of species has (i)_____ since the Cambrian period, or whether imperfections in the fossil record only suggest greater diversity today, while in actuality there has been either(ii)_____ or decreased diversity.
- Achanged.. escalation
- Bincreased. stasis
- Cexpanded.. discontinuity
- Ddeclined.. reduction
- Eimproved.. deviation
B显示答案
以上解析由 考满分老师提供。
