2. 外语
  3. Some plants ____________ (对污染很敏感) that they can only survive in a perfectly clean environment.

Some plants ____________ (对污染很敏感) that they can only survive in a perfectly clean environment.

admin2012-11-22  27
问题 Some plants ____________ (对污染很敏感) that they can only survive in a perfectly clean environment.
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答案are so sensitive to pollution
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大学英语四级

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