求助PREP中的逻辑题

selinataki

1.    (24179-!-item-!-188;#058&000705)

 

Although fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite.  Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.

 

Which of the following, if true, most seriously undermines the argument?

 

(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.

(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.

(C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.

(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.

(E) Shungite itself is formed only under distinctive conditions.

答案为什么是 E呢，想不通啊：（

speed713

1.     (24179-!-item-!-188;#058&000705)

 

Although fullerenes富勒烯--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the
                rare mineral shungite岩石硬瀝青.  Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.

實驗室發現的F物質在大自然中稀少的mineral shungite岩石硬瀝青也有發現

實驗室要合成F物質需要特殊的環境,所以自然環境中的F也是在同樣特殊的環境

Which of the following, if true, most seriously undermines the argument?

削弱-----發現F的自然環境根本還是一個未知的晶體結構

(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.(X)

(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.(X)

(C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.(無關)

(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.

(E) Shungite itself is formed only under distinctive conditions.(支持)

selinataki

也就是说自然生成的F和实验室里的F是不同的结构？

我以为两者指的是同一种的东西，所以怎么都看不懂：（

谢谢了：）