2. 外语
  3. Although the feeding activities of whales and walruses give the seafloor of the Bering Shelf a devastated appearance, these acti

Although the feeding activities of whales and walruses give the seafloor of the Bering Shelf a devastated appearance, these acti

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问题 Although the feeding activities of whales and walruses give the seafloor of the Bering Shelf a devastated appearance, these activities seem to be actually (i)____ to the area, (ii)____ its productivity.
选项 A、destructive…counterbalancing
B、rehabilitative…diminishing
C、beneficial…enhancing
D、detrimental…redirecting
E、superfluous…encumbering
答案C
解析 空格(i)：
- 方程等号：Although尽管，反义重复。
- 强词和对应：前文说鲸鱼和海象的觅食活动带来了毁灭性的外观。these activities指代前文的feeding activities，因此devastated指向空格(i)，根据Although取反，体现这些活动是“没有破坏性的”或“破坏性小的”。destructive破坏性的，rehabilitative康复的，beneficial有利的，detrimental有害的，superfluous多余的。选项B和C合适。
空格(ii)：
- 方程等号：逗号，同义重复。
- 强词和对应：逗号前面对这些觅食活动是正评价，因此空格(ii)和空格(i)同义重复，体现对生产率是“有利的”作用。counterbalance抵消(错)，diminish减少(错)，enhance增加(对)，redirect改变方向(错)，encumber阻碍(错)。综合空格(i)，答案选C。
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