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题目内容
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.
- Aperil
- Bactivity
- Cformation
- Dvariety
- Efluctuation
D显示答案
以上解析由 考满分老师提供。