求教一道逻辑题

innerpeace.donUID: 3340602

Centuries ago, the Maya of Central America produced elaborate, deeply cut carvings in stone.  The carvings would have required a cutting tool of hard stone or metal.  Iron-ore deposits exist throughout Central America, but apparently the Maya never developed the technology to use them and the metals the Maya are known to have used, copper and gold, would not have been hard enough.  Therefore, the Maya must have used stone tools to make these carvings.
Question
Which of the following, if true, most seriously weakens the argument?
A.        In various parts of the world, civilizations that could not make iron from ore fashioned tools out of fragments of iron from meteorites.
B.        All the metallic Mayan artifacts that have been found by archaeologists are made of metals that are too soft for carving stone.
C.        The stone out of which these carvings were made is harder than the stone used by other Central American peoples.
D.        The technique that the Maya used to smelt gold and some other metals could not have been easily applied to the task of extracting iron from iron ore.
E.        Archaeologists disagree about how certain stone tools that have been found among Mayan ruins were used.

我选C，可是答案是A，为什么呢？求高人指点。

humewangUID: 3362165

这一题的论点是：由于没有技术炼铁，所以不可能是铁，必然是其他东西。

A说，不用炼铁，有陨石。所以不用炼铁，也可以用铁。
C说，用的石头不够硬。这只能说石头也不是用来刻壁画的而已。

innerpeace.donUID: 3340602

humewang 发表于 2012-10-19 12:59
这一题的论点是：由于没有技术炼铁，所以不可能是铁，必然是其他东西。

A说，不用炼铁，有陨石。所以不用 ...

但是文章的结论是Maya一定是用石头作为工具，C项是否更加直接得否定了该结论呢？
A项虽然也有weaken的作用，但是它只是说明了还有用iron的可能性，但是不能否定不可以用stone吧？

humewangUID: 3362165

innerpeace.don 发表于 2012-10-19 13:38
但是文章的结论是Maya一定是用石头作为工具，C项是否更加直接得否定了该结论呢？
A项虽然也有weaken的作 ...

A中有 In various parts of the world，说明是一种比较普遍的现象吧。
C中是 by other Central American peoples，是不是有点间接？

这是哪的题？这种干扰强度太大的题，不必太在意。新G中的逻辑题都很好直接的。

ispalindromeUID: 3265723

求问啊。楼主的逻辑题哪找的。我现在也是对逻辑题没有一点感觉，不知道从哪入手。求推荐资料，我要好好练练逻辑题。。感谢感谢

innerpeace.donUID: 3340602

humewang 发表于 2012-10-19 17:44
A中有 In various parts of the world，说明是一种比较普遍的现象吧。
C中是 by other Central American ...

但是Maya在文中好像就生活在central America，我感觉直接描述central America比说其他地方要更直接吧。

好的，这道题的确比较干扰，不讨论了，呵呵，不过还是谢谢你的热心解答。

innerpeace.donUID: 3340602

ispalindrome 发表于 2012-10-19 21:47
求问啊。楼主的逻辑题哪找的。我现在也是对逻辑题没有一点感觉，不知道从哪入手。求推荐资料，我要好好练练 ...

好像是太傻论坛上的关于verbal的练习里面的一道题。你去看看，应该还有。你也可以做一下逻辑10套，网上有的。

ispalindromeUID: 3265723

innerpeace.don 发表于 2012-10-20 09:25
好像是太傻论坛上的关于verbal的练习里面的一道题。你去看看，应该还有。你也可以做一下逻辑10套，网上有 ...

好的 。多谢~
楼主觉得逻辑10套的答案有问题没。我怎么感觉第9套的答案跟36套相同题目的答案有很多不同啊。