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In a major________ for bat populations in the United States, on average 90 percent of the hibernating bats in four important caves and mines in New York died in the space of one year.
- A.achievement
- B.reversal
- C.venture
- D.calamity
- E.undertaking
- F.disaster
D,F显示答案
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以上解析由 考满分老师提供。
