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题目内容
The first images of Jupiter's moon Callisto show bright regions of material, as if older and darker ice had slid downhill and exposed the _____ ice underneath.
- Aancient
- Bmurky
- Ccompact
- Dpristine
- Egrimy
- Funblemished
D,F显示答案
以上解析由 考满分老师提供。