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题目内容双击单词支持查询和收藏哦～
Saturn' s planetary ring system is arguably the _______________
structure known to humankind: it has an end-to-end dimension equivalent to the distance traveled by circling Earth seven times but a vertical height about that of a house.
- A.densest
- B.flattest
- C.least elliptical
- D.most asymmetrical
- E.least complex
B显示答案
以上解析由 考满分老师提供。
