求1道逻辑题： Ex4中的13题

juratbyrUID: 3079200

3. Although the prevailing supposition has been that
it is too hot for microorganisms to survive deep below the
Earth's surface, some scientists argue that there are
living communities of microorganisms there that have
been cut off from surface life for millions of years.
These scientists base their argument on the discovery
of living microorganisms in samples of material that
were taken from holes drilled as deep as 1.74 miles.
The scientists' argument depends on which of the fol-
lowing assumptions?
(A)The microorganisms brought up were of a
species that is related to those previously
known to science.
(B)No holes have been drilled into the Earth's
surface to a distance deeper than 1.74 miles
(C)The microorganisms did not come from surface
soil that came into contact with the drilling
equipment.
(D) The stratum from which the samples came has
been below the surface of the Earth ever since
the Earth came into existence.
(E) The temperature at the bottom of the holes drilled
was not significantly hotter than that of the
hottest spots on the Earth's surface.

求各位高手解析；答案我不太赞同，为什么C是对的。凭什么依据来选他；求指点，非常感谢楼主

zhengyuyu123UID: 2810409

仔细读下其他四个选项都是无关或者不影响结论的，只有C最合理
要证明微生物能在地底生存，当然要排除从地面带下去的可能性

juratbyrUID: 3079200

非常感谢楼主的解析。。。