单项选择题


A．rather
B．other
C．more
D．less
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单项选择题
Which of the following is true of the idea of degassing the lake
A．h was a good idea.
B．Some scientists veto it.
C．It's impossible.
D．Some farmers still venture back with their livestock.
单项选择题
What caused the disaster at Lake Nyos
A．Terrorism.
B．Volcanic eruption.
C．Release of CO2 at a nearby lake.
D．A limnic eruption at Lake Nyos.
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