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题目内容双击单词支持查询和收藏哦～
The constant movement of Earth's outer shell produces a significant amount of geological ______________: volcanoes that result trom the interactions of tectonic plates, for example, differ in size, shape, chemistry, and eruption style.
- A.peril
- B.activity
- C.formation
- D.variety
- E.fluctuation
D显示答案
以上解析由 考满分老师提供。
