GWD28的一到逻辑，NN们贴出来的答案有D有E，到底哪个对啊？大家讨论一下吧……

vevewen · 发表于 2005-11-14 04:56:00

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

laihong · 发表于 2005-11-19 15:12:00

Ｅ，典型的无因无果的支持

ruiamyzhang · 发表于 2005-11-20 06:31:00

why no C?--有果有因型支持

因为其它可以在有毒土壤中生活的这类植物（有果）也产生histidine（有因）？

淡蓝色的回忆 · 发表于 2005-11-20 21:06:00

答案是D。

E不对，histidine 不一定减少，有可能由植物继续合成。

GWD28的一到逻辑，NN们贴出来的答案有D有E，到底哪个对啊？大家讨论一下吧……

GWD28的一到逻辑，NN们贴出来的答案有D有E，到底哪个对啊？大家讨论一下吧……

所属分类: GMAT考试

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