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题目内容
In agricultural ecosystems such as sunflower and cranberry plantations,most insect herbivores do not attain outbreak densities, suggesting that they are ______________ natural enemies.
- Apentiful despite
- Bdisguised as
- Cshielded from
- Dregulated by
- Edependent on
D显示答案
以上解析由 考满分老师提供。