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题目内容双击单词支持查询和收藏哦～
Circulatory systems on organisms originated in widely separated epochs, according to the fossil record, and under a broad range of circumstances, the myriad forms they take attest to that ______ of origin.
- A.mysteriousness
- B.randomness
- C.ambiguity
- D.heterogeneity
- E.indeterminacy
- F.diversity
D,F显示答案
以上解析由 考满分老师提供。
