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题目内容双击单词支持查询和收藏哦～
Despite their initial fears, most environmentalists now concede that the artificial reefs have had a largely _____ effect on surrounding ecosystems.
- A.unfounded
- B.benign
- C.caustic
- D.interminable
- E.innocuous
- F.plaintive
B,E显示答案
以上解析由 考满分老师提供。
