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标题: cr jj 答案讨论 [打印本页]

作者: ondesert 时间: 2007-8-11 04:04
标题: cr jj 答案讨论
道GWD的变体，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

原题问support,现在问evaluate这个结论，给了5个whether，我看了下原题，基本上就是原来的选项加上个whether

原GWD 选项

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

可是 D 似乎也有道理。 C 并不能说明这种acid起到什么作用，好比说蕨类植物的叶子都有什么细胞一样，很普通的共性而已。D的话似乎更加好。大家看法如何？

作者: yhysss 时间: 2007-8-11 16:47

这题肯定是C

作者: ll_422 时间: 2007-8-11 17:07
others of the closely related group of plants 这几个关键词说明了C的正确性.

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