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题目内容双击单词支持查询和收藏哦～
Saturn's rings, among the most iconic features in the solar system, are not ____________: they're raining so much water onto the planet that in 300 million years they could rain themselves nearly out of existence.
- A.primordial
- B.commensurable
- C.immutable
- D.symmetrical
- E.haphazard
C显示答案
以上解析由 考满分老师提供。
