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题目内容双击单词支持查询和收藏哦～
Earth's relatively stable climate over the last 8,000 years may have been __________, reflecting a coincidental near balance between a natural cooling that should have begun and an offsetting warming effect caused by humans.
- A.temporary
- B.beneficial
- C.accidental
- D.serendipitous
- E.unexceptional
- F.predictable
C,D显示答案
以上解析由 考满分老师提供。
