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题目内容双击单词支持查询和收藏哦～
The theory that the 1908 Tunguska event was the explosion of a cosmic body in the sky over Siberia is _____: no one has yet found fragments of the object or any impact craters in the affected region.
- A.long-standing
- B.indisputable
- C.plausible
- D.uncontested
- E.unproven
E显示答案
以上解析由 考满分老师提供。
