Prep 1正确选项的疑问

jasdesky

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.(无关废话)

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

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

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

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

 

D长得象正确选项，ABCE通过排除法也可以排除。但是我有个问题就是D怎么就undermine了原文呢

原文说：因为实验室合成F需要特定的温度和压力，因此可以让地质学家知道F在自然合成时地壳的状况

如果要undermine的话方向也应该着力于自然合成时地壳状况和实验室状况的不一样啊

D的意思是自然合成F的晶体结构大家不知道，这怎么就undermine结论了呢？

不明白啊

florence1108

同问同问~顶上去！

喝咖啡的狼

The naturally occurring fullerenes are arranged in a previously unknown crystalline structure

新发现的 fullerenes 结构和以前发现的都不一样，所以可能形成的气候温度要求不一定一样，所以无法判断

喝咖啡的狼

 如果要undermine的话方向也应该着力于自然合成时地壳状况和实验室状况的不一样啊

答案里应该是狡猾的暗示着这一情况

[此贴子已经被作者于2008-7-7 18:34:48编辑过]

jasdesky

明白了

谢谢

夜凉如水

同问这题