ChaseDream

标题: 第一道怎么就这么难啊~~~~~~~~~~~~~~~PREP 逻辑 1 [打印本页]

作者: 能量毛豆儿 时间: 2012-8-26 10:08
标题: 第一道怎么就这么难啊~~~~~~~~~~~~~~~PREP 逻辑 1

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

Although fullerenes--sphericalmolecules made entirely of carbon--were first found in the laboratory, theyhave since been found in nature, formed in fissures of the rare mineralshungite. Since laboratory synthesis offullerenes requires distinctive conditions of temperature and pressure, thisdiscovery should give geologists a test case for evaluating hypotheses aboutthe state of the Earth's crust at the time these naturally occurring fullereneswere formed.

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

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

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

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

(E) Shungite itself is formed onlyunder distinctive conditions.

答案是D, 求点化!!!

作者: coline0703 时间: 2012-8-26 17:38
题意：F自从从实验室发现后就在自然中发现了，在S中找到的。因为F的合成需要很独特的温度和压力，所以专家需要评价在F合成时地壳的状态。
Weaken的话就是说明专家不需要这么做，隔断前提。
A,证明S真的含有来自跟实验一样的F.(加强）
B,有F在撞击的小陨星的遗留物中找到。（无关，题目讨论的是F在S中找到的情况，而不是在陨星中找到的）
C,S中含有碳，F中含有这种碳。（加强）
D,这种在自然中找到的F含有一个未知的结构。（这说明这种F和实验室合成的不是同一种，因为他们的结构不同）
E,S是在这种很有独特的情况下合成的。（加强)
哈，也不知道这样对不对，欢迎批评！

欢迎光临 ChaseDream (https://forum.chasedream.com/)