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题目内容双击单词支持查询和收藏哦～
The (i)_____ of molecular oxygen on Earth-sized planets around other stars in the universe would not be (ii)_____ sign of life: molecular oxygen can be a signature of photosynthesis (a biotic process) or merely of the rapid escape of water from the upper reaches of a planetary atmosphere (an abiotic process).
- Blank(i)
- dearth
- presumption
- detection
- Blank(ii)
- a controversial
- an unambiguous
- a possible
detection , an unambiguous 显示答案
以上解析由 考满分老师提供。
