2. 职称英语
  3. By (i)______many aspects of natural river ecosystems, some dams cause serious ha

By (i)______many aspects of natural river ecosystems, some dams cause serious ha

游客2025-02-21  27
问题 By (i)______many aspects of natural river ecosystems, some dams cause serious harm, producing (ii)______effects on water, land, wildlife, and even the atmosphere.
选项
答案 B，F
解析 逗号说明前后同义重复。第二空与harm(伤害)同义重复。negligible可忽略的，salutary有利的，deleterious有害的。答案选F。obliterate除去，alter变更，ameliorate改善。代入选项，答案选B。
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