OG11-6不解

6. Not all life depends on energy from sunlight. Microbial life has been found in bedrock more than five kilometers 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 statements above, if true, best support which of the following as a conclusion?

A. The location in the bedrock where microbial life was found was not near a system of volcanic vents through which hydrogen and other gases rose from the interior of the Earth.

B. Bacteria are able to exist at eh molten center of the Eargh.

C. A through survey of a planet's surface is insufficient to establish beyond a doubt that the planet contains no life.

D. Life probably exist on Sun-orbiting comets, which are cold agglomerations of space dust and frozen gases.

E. Finding bacterial remains in coal and oil would establish that the bacterial had been feeding on substances that had not been produced from the energy of sunlight.

做了两次，都选错了，看来应该是整道题都没搞懂，尤其是C和E，每次都选的E，正确答案是C。望明白的人解答！谢谢。

bacteria 在深海里，不在coal和oil当中。所以E不对 

http://forum.chasedream.com/dispbbs.asp?boardid=24&id=129638&star=1#1975970

请教各位大师，虽然C正确能想通，但是为什么D不对？

题干的关键词是life，D的关键词也是life

而且D举了一个事实来说明在没有sunlight的情况下依然有life存在。

如果没有提干，d答案仍旧成立。

不选择d的理由，主要是d的句意与提干的含义无关。

bubu

给出连接的那个讨论很解决问题的说