[CR]爭議題GWD28-Q28
看板GMAT (GMAT入學考試)作者yuanz (rock your body)時間13年前 (2013/05/01 15:09)推噓0(0推 0噓 0→)留言0則, 0人參與討論串1/2 (看更多)
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
看了曼哈頓還有beatthegmat
這題C.D.E三個選項都有人說是正確答案
實在搞不懂 請板上的高手解惑~~
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