紧急求助 OG11th - 6

6  not all life depends on energy from sunlight. microbial life has been found in bedrock more than 5 kilometers below the surface of the earth, and bacteric have been  found on the deeep 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 conclusion?

(A)the location in the bedrock where microbial life was found was not near a system of vacanic vents through hydrogen abd other gases rose from the interior of the earth.

(B) bacteria are able to exist at the molten center of the earth .

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

(D)life probably exists on sun-orbiting comets,which are cold agglomerations of space dust and forzen gases .

(E)finging becteria remains in coal and oil would establish that the bacteria had been feeding on substances that had not been produced from the energy of sunlight .

因为这是原文->选项题，所以选项中不能含有原文没有的信息。所以可排除D。

原文中谈到了M和B两种生物，所以conclusion不应具体地谈M或B，而应做一个general statement about both.

A只讲了M,B和E只讲了B，所以均可排除。

因为M和B都不是在surface上的生物，所以对一个planet's surface的调查并不能说明这个planet上有没有生物。C正确。