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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 growth of this herb have discovered that it produces large amounts of
histidine, an amino acid that, in test-tube solutions, renders these metals chemically
inert. Hence, the herb’s high histidine production must be the key feature that
allows it to grow in metal-rich soils.
In evaluating the argument, it would be most important to determine which of the
following?
A. Whether the herb can thrive in soil that does not have high concentrations of
the toxic metals
B. Whether others of the closely related group of plants also produce histidine in
large quantities
C. Whether the herb’s high level of histidine production is associated with an
unusually low level of production of some other amino acid
D. Whether growing the herb in soil with high concentrations of the metals will,
over time, reduce their concentrations in the soil
E. Whether the concentration of histidine in the growing herb declines as the
plant approaches maturity
我觉得,evaluate the argument就是去找,histidine是不是让这个植物能活在重金属土壤里的原因。也就是找一个选项能说明,到底h是不是key feature。
GWD一道相同材料的题,答案是E。
这个题我觉得虽然答案是B。但是我觉得B缺失信息,并不能完整补充逻辑。
我觉得B改成:是否其他能生产h的植物也能活在重金属土里。
而E呢,这里面我觉得没关,但是另一个GWD28却选的E。
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