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Which of the following most logically completes the argument?
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb's high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.

正确答案: E

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28. GWD28-Q28,一道纠结的CR,值得讨论下

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发表于 2010-2-1 12:10:31 | 只看该作者 回帖奖励 |正序浏览 |阅读模式
28. GWD28-Q28:
Which of the following most logically completes the argument?
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants.  Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert.(惰性)  ossibly, therefore, the herb’s high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.
A.    histidine is found in all parts of the plant—roots, stem, leaves, and flowers
B.    the herb’s high level of histidine production is found to be associated with an unusually low level of production of other amino acids
C.    !others of the closely related group of plants are also found to produce histidine in large quantities
D.    cultivation of the herb in soil with high concentrations of the metals will, over an extended period, make the soil suitable for plants to which the metals are toxic
E.    the concentration of histidine in the growing herb declines as the plant approaches maturity
我选D,有人说选E,到底选哪个呢?大家讨论呀
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20#
发表于 2013-9-29 05:50:01 | 只看该作者
第一直觉选D。看了大家的讨论后,似乎觉得选E。后来咨询了一位大牛,给出了这样的解释:本题缺少一个逻辑链,即inert=nontoxic。为了方便理解,还给出了个例子:学校长期受黑帮问题影响(concentrations of metal),现在学校引进了方法A(H)来消灭黑帮,但消灭黑帮后学生一定能学习好么?可能学校还有毒品问题。也就是说,inert metal不一定代表nontoxic,可能inert metal还有别的问题,D选项恰好弥补了这个问题,金属失活后,植物能很好成长。因此答案是D。

19#
发表于 2013-9-28 22:28:03 | 只看该作者
这题必须选C !!! ,现象:这种植物在有毒的soil里生长。 解释:这种植物可以产生H来降低金属毒性,因此可以生长。   如果要加强这个解释,有一种办法是“有因有果” ,就是再举一个相同的案例,因为前提说过和这种植物很相似的其他植物都可以在有毒的soil 里生长,那么添加一个原因(其他植物里都有大量的H)就可以加强原来的解释啦!~ 而D中存在很多的干扰因素(我觉得如果没有over an extended period比较好),如果觉得分析的不对,就及时指出!
18#
发表于 2013-9-28 20:18:26 | 只看该作者
akiluk 发表于 2010-9-30 15:23
大家认真看一下题~ A certain cultivated herb is one of a group of closely related plants that thrive  ...

原来是这样!逻辑真的看题是一点都不能大意
17#
发表于 2011-7-5 01:04:45 | 只看该作者
m
16#
发表于 2010-12-21 16:13:50 | 只看该作者
同意八楼, 正解是C
15#
发表于 2010-12-20 18:39:01 | 只看该作者
大家认真看一下题~
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals.
后面的
thrive in soil with high concentrations 修饰的是 a group of closely related plant
文章说 a group 里的一种 herb 因为
histidine可以生长 ,得出(group 中的其他植物也是)因为H这种物质而得以生长,有gap!!
所以选C   group 中的其他植物都有H这种物质  这样就可以推出是因为H物质。

-- by 会员 akiluk (2010/9/30 15:23:23)


太对了!!
14#
发表于 2010-12-1 11:03:03 | 只看该作者
选C哈,第一句话里的A certain cultivated herb is one of a group of closely related plants不是白给的,逻辑题里面的信息几乎都是有用的,就像那个打印机和打印纸的那个逻辑题。
13#
发表于 2010-11-9 22:53:35 | 只看该作者
8楼解释得很好。。原文的意思大致是:
一种cultivated herb属于一大群能存活在high concentrations of metals的植物之一,虽然metals是有毒的,但herb能分泌histidine来阻止毒素,所以herb是因为histidine才存活,问support

C答案是:其它能存活在metals的植物也分泌histidine,由此加强了结论

D答案是:herb在metals中活久了之后,也能让别的植物存活在metals中,根本没提到histidine,明显的无关项
-- by 会员 rangerandom (2010/11/9 21:10:17)


肯定是c!!
12#
发表于 2010-11-9 21:10:17 | 只看该作者
8楼解释得很好。。原文的意思大致是:
一种cultivated herb属于一大群能存活在high concentrations of metals的植物之一,虽然metals是有毒的,但herb能分泌histidine来阻止毒素,所以herb是因为histidine才存活,问support

C答案是:其它能存活在metals的植物也分泌histidine,由此加强了结论

D答案是:herb在metals中活久了之后,也能让别的植物存活在metals中,根本没提到histidine,明显的无关项
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