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标题: 注意：GWD-28-28答案很可能有误。。。。。。 [打印本页]

作者: prfdu2005 时间: 2007-2-22 18:02
标题: 注意：GWD-28-28答案很可能有误。。。。。。

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 ______.

histidine is found in all parts of the plant—roots, stem, leaves,
and flowers
the herb’s high level of histidine production is found to be
associated with an unusually low level of production of other amino acids
others of the closely related group of plants are also found to
produce histidine in large quantities
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
the concentration of histidine in the growing herb declines as the plant
approaches maturity

答案是e,可我认为d对。正是histidine使得土壤中的铁无法起作用，所以经过一段时间的分泌，herb就会使土壤中有很高含量的histidine，使得其他植物也可以健康生长在这种有histidine保护的含铁土壤中

另外，顺便问一下这道题：答案为c. nn 们能给我讲讲e是啥意思，以及为什么不对吗？Q7:

In 1960’s studies of rats, scientists found that crowding
increases the number of attacks among the animals significantly. But in recent experiments in which rhesus
monkeys were placed in crowded conditions, although there was an increase in
instances of “coping” behavior—such as submissive gestures and avoidance of
dominant individuals—attacks did not become any more frequent. Therefore it is not likely that, for any species
of monkey, crowding increases aggression as significantly as was seen in rats.

Which of the following, if true, most
strengthens the argument?

All the observed forms of coping behavior can be found among
rhesus monkeys living in uncrowded conditions.
In the studies of rats, nondominant individuals were found to
increasingly avoid dominant individuals when the animals were in crowded
conditions.
Rhesus monkeys respond with aggression to a wider range of stimuli than
any other monkeys do.
Some individual monkeys in the experiment were involved in
significantly more attacks than the other monkeys were.
Some of the coping behavior displayed by rhesus monkeys is similar to
behavior rhesus monkeys use to bring to an end an attack that has begun.

作者: frances77 时间: 2007-2-22 19:41

答案应该不是d也不是e吧，是c呀

d和a都是某种程度的重复原文，虽有加强作用但不及C,且C中others of the closely related group of plants与原文one of a group of closely related plants 对应

另一题e讲的是r猴在crowded conditions情况下表现出的coping behavior和他们用来结束attack时的动作相似，也就解释了为什么他们不常attack，但并没有争对原文结论，尤其是any species of monkey。

作者: prfdu2005 时间: 2007-2-22 19:54
第一题c起的是削弱作用啊

第二题e 不正说明小猴不爱打架吗？一触即发的战争都能被小猴以结束战争的做法处理，多友好啊

[此贴子已经被作者于2007-2-22 19:59:49编辑过]

作者: frances77 时间: 2007-2-22 23:45

NO.1 C应该是加强阿，其他和herb同类（能在此种土壤生存）的植物也含有大量histidine ,不正说明herb是通过histidine起作

用的吗？！

NO.2 E说还没怎么开始打假就结束了，怎么会是爱打假呢？

作者: zijing4546 时间: 2007-2-23 08:58
第一题,题干想确定这种药草的适应在金属含量很高的土壤中的特性是不是由于自身有histidine的缘故.
C说大家都有histidine,,楼上的注意啊,大家都有histidine,那肯定就说明跟histidine没关系了,楼上的那个逻辑我不敢苟同.
D,这个选项,楼主对D的选项的理解是主观臆断出来的,因为选项根本就没提到histdine,而只说了一个现象,这个现象是不是由于有histidine产生的呢?选项没作答.
E说植物成熟后,histidine变少了,意思是说,植物成熟了,已经能适应该环境了,没必要分泌histidine了.
故选E

作者: frances77 时间: 2007-2-23 15:42

others of the closely related group of plants are also found to produce histidine in large quantities

C说大家都有histidine,,楼上的注意啊,大家都有histidine,那肯定就说明跟histidine没关系了,楼上的那个逻辑我不敢苟同.

有没有注意到C的绿色部分呢？根据题干第一句话，这个closely related group of plants是指能在重金属土壤生存的植物，他们含h,而herb也能在重金属土壤生存，herb也含h，说明herb的h就是原因阿。这不是很好的加强吗？怎么就排除了？

E说植物成熟后,histidine变少了,意思是说,植物成熟了,已经能适应该环境了,没必要分泌histidine了

不对吧，这个意思是多想出来的，难道成熟了就不需要吸收土壤成分了？这些是不得知的！

作者: lb1900 时间: 2007-5-13 18:08

毫无疑问D.

C与文中讨论的使金属钝化的作用无关。D说明正式H的钝化作用使土地适于生长植物。

[此贴子已经被作者于2007-5-13 18:14:12编辑过]

作者: ly365 时间: 2007-5-19 12:15
ding

作者: chamcham 时间: 2007-6-20 16:29

C, this one is easy, dont get urself confused, "the closely related group of plants" in C refers to the "a group of closely related plants" which includes that herb. So typical "same cause, same effect" strenghen

作者: chuneyu_lee 时间: 2007-7-12 13:29

Q28应该选D。C选项说的是others of the closely related group of plants，是个无关项。

Q7的答案给的正确，选C。C选项说明，这种猴子已经比其他任何一种猴子容易respond with aggression，而argument说这一种猴子在试验中没有表现出increased aggression，正好加强了结论。

作者: yuaneliza 时间: 2007-11-16 00:51
prefer D, 理解上觉得C是力度很弱，既然是CLOSELY RELATELY PLANTS，有相似点是很正常的，有histidine这个相似点不能很好加强HISTIDINE有INERT MENTAL的作用

作者: ferysky 时间: 2007-11-16 11:36
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=269008&page=1

作者: easygoer 时间: 2007-11-16 13:58

28题是E。5楼正解。5楼之后的各位怎么不看看人家的解释呢？5楼解释的非常到位。D根本没有提及该题结论中的关键词histidine。C就更离谱了,完全是无关的信息。

作者: zhangsr 时间: 2007-11-16 15:17

以下是引用zijing4546在2007-2-23 8:58:00的发言：
第一题,题干想确定这种药草的适应在金属含量很高的土壤中的特性是不是由于自身有histidine的缘故.
C说大家都有histidine,,楼上的注意啊,大家都有histidine,那肯定就说明跟histidine没关系了,楼上的那个逻辑我不敢苟同.
D,这个选项,楼主对D的选项的理解是主观臆断出来的,因为选项根本就没提到histdine,而只说了一个现象,这个现象是不是由于有histidine产生的呢?选项没作答.
E说植物成熟后,histidine变少了,意思是说,植物成熟了,已经能适应该环境了,没必要分泌histidine了.
故选E

.原题中没有地方说明职务成熟后就适应环境,从而不用histidine吧?

题目中说histidine make metal inert 是在tube中试验的结果, 而d说明在实际生长中, 也起到了一样的作用

所以我觉得是D

作者: adven 时间: 2007-12-1 03:00

我觉得关键是就算不产生某种氨基酸 "高金属"对种草一定有害吗? 题干看不出这一点,所以C,D都是无关选项. 另外,grow的意思是: To develop and reach maturity, maturity是grow的终点,所以答案是E.

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