A、The deep and enduring effect that volcanic eruptions have on the environment B、The process by which classic volcanic eruptions

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问题

选项 A、The deep and enduring effect that volcanic eruptions have on the environment
B、The process by which classic volcanic eruptions tend to occur
C、The relative dearth of cases with scientists can judge the effects of volcain eruptions
D、A sample case with which later volcanic explosions are compared
E、The global cooling effects of one of the best-studied volcanic eruptions

答案D

解析
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