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题目内容
Agronomists are increasingly worried about "desertification," the phenomenon that is turning many of the world's (i)_____ fields and pastures into (ii)_____ wastelands, unable to support the people living on them.
- Afertile.. barren
- Bproductive.. blooming
- Carid.. thriving
- Dpoorest.. marginal
- Elargest.. saturated
A显示答案
以上解析由 考满分老师提供。