Why was the death regarded silent? What caused the disaster at Lake Nyos?

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问题 Why was the death regarded silent?
What caused the disaster at Lake Nyos?

选项 A、Terrorism.
B、Volcanic eruption.
C、Release of CO2 at a nearby lake.
D、A limnic eruption at Lake Nyos.

答案D

解析 细节题。本题关键是对选项D的理解。原文的第二段揭示了它的意思。选项A和C都是与1988年附近的Monoun湖相关的概念。选项B火山喷发在本段中没有提及。
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