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题目内容
Apparently, advanced tortoises evolved multiple times: the high-domed shells and columnar, elephantine feet of current forms are specializations for terrestrial life that evolved _____ on each continent.
- Aindependently
- Binterchangeably
- Cparadoxically
- Dsimultaneously
- Esymmetrically
A显示答案
以上解析由 考满分老师提供。