新PREP1

kitebird

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.

第一题就错了：（

不太理解为什么是D？？

sunnyswallow

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

(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.如果不加collided with spacecraft还有可能weaken, 说明是天外来石,不产自地球

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

(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure. D恰好说明他们构造根本就不一样,说明形成原因也不相同,自然无法推论natural form backgrond

(E) Shungite itself is formed only under distinctive conditions. 对原文的重复,也算加强

yf1369

up

nn在解释一下吧，我还是不太明白。我错选了C，因为不知道题目是怎么推出的结论。D是想说明sh和full没有关系么？

芷萱85

我觉得d有点反对前提的意思 但是其他的真的不好

MissNewMe

我这道题也是一上来就错了！真是不可思议为什么会选D？

gonghao

D没错

实验室里做出来的东西来推自然界的这个东西的形成条件是可以的

但是有个前提，这两个东西必须是同一物质，

如果实验室做出来的东西，是，自然界的这个东西的，同分异构体之类的东西，那么实验室的条件是不能用于推出自然界另外一个东西的形成条件的。

举个例子

石墨和金刚石（物质都是C）

用实验室的石墨的条件推出自然界形成金刚石的条件是不科学的。

MissNewMe

好多人讨论这道题啊~~~~看了好多讨论终于明白了~~~~~~~

逻辑真是不简单啊!!~~~

mimixiaxia

up

mimixiaxia

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.
第一题就错了,郁闷死了,还想了半天也没想明白,看了讨论后似乎是明白了.
fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory根据这种结构,geologists提出了一种假设,找到在自然界的这种东东后,希望通过分析它来evaluate他们以前的假设(a test for evaluating hypotheses),结果D说自然界发现的东东结构和实验室里的不同,也就是说不是同一样东东,不能用来验证以前的假设
应该是这样理解吧......

myaska

这题真不简单，同分异构体都出来了，勾起了高中的回忆啊

这题关键是Crystalline Structure这词不认识啊，我还以为是什么晶矿结构呢，哎……