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题目内容双击单词支持查询和收藏哦～
Since methane doesn' t last long in the atmosphere, its detection on Mars would indicate_____________source-perhaps a living organism, or an active geological process-and shed valuabie light on whether the planet is habitable.
- A.an intermittent
- B.a dynamic
- C.an ongoing
- D.an inexhaustible
- E.a latent
- F.an unlimited
B,C显示答案
以上解析由 考满分老师提供。
