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题目内容
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.
- Atemporary
- Bbeneficial
- Caccidental
- Dserendipitous
- Eunexceptional
- Fpredictable
C,D显示答案
以上解析由 考满分老师提供。