GWD 28-28 which choice is correct

leohymo

28-28: 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 ______.

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

chrislee

同问, NN们现身吧, 应该是D还是E呀! 急呀!

shiningshining

。

[此贴子已经被作者于2005-9-22 16:46:06编辑过]

howardwang

应该是c.

XDF的答案是不对的。

shiningshining

[此贴子已经被作者于2005-9-22 16:46:27编辑过]

howardwang

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=131287&replyID=&skin=0

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=131710&replyID=&skin=0

howardwang

简单的说，本题就相当于样本可以代表总体，所以支持结论。

C是正确选项。

E是无关选项。

dewsue

d我觉得是。不过，我刚给女友发过去，明早XDJM和我都可以参考一下她们那几个教授的选项的，她们学校的农业是最强的，希望对我们有帮助。

shiningshining

.

[此贴子已经被作者于2005-9-22 16:47:04编辑过]

howardwang

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 ______.

C: others of the closely related group of plants are also found to produce histidine in large quantities 从C可以得出，这类植物都有一个共同点。

当一类事物中有一个共同点（而且已经证明，这类事物中的一个事物的该共同点对事物的特征有作用，即： large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert.），且这类事物表现出一个共同的特征（a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants.）。

那么，你能推出什么呢？

可能就是这个共同点造成了这个共同的特征。所以支持结论。