Not all life depends on energy from sunlight. Microbial life has been found in bedrock mosr ethan five kilo below the surface of the Earth, and bacteria have been found on the deep ocean floor feeding on hydrogen and other gases rising from the interior of the Earth through vents in the ocean floor.
The statement above, if true, best support which of the following as a conclusion?
the answer is C: a thourough survey of a planet's surface is insufficient to establish beyond a doubt that the planet contains no life.
请告之C项何意? "establish beyond a doubt that..." 怎么解释呢? 此题就是谈not all life depends on energy from sunlight, 是吗?
多谢!
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