XDF-178

which of the following most logically completes th argument

a certain cultivated herb is one of a group of closely related

plants that thrive in soil with high concerntrations 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. Possibily, therefore, the herb's high histidine production

is what allows it to grow in metal-high 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.other 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

答案选e， 但我觉得选c， 因为c说明了其他植物具有和herb一样的特点，这

样就加强了是"histidine"这个因素使得herb能在这种土壤中生存

XDF-182

Advertisement: For sinus pain, three out of four hospitals give

their patients Novex. So when you want the most effective

painkiller for sinus pain, Novex is the one to choose.
Which of the following, if true, most seriously undermines the

advertisement’s argument?
(A) Some competing brands of painkillers are intended to reduce

other kinds of pain in addition to sinus pain.
(B) Many hospitals that do not usually use Novex will do so for

those patients who cannot tolerate the drug the hospitals usually

use.
(C) Many drug manufacturers increase sales of their products to

hospitals by selling these products to the hospitals at the lowest

price the manufacturers can afford.
(D) Unlike some competing brands of painkillers, Novex is available

from pharmacies without a doctor’s prescription.
(E) In clinical trials Novex has been found more effective than

competing brands of painkillers that have been on the market longer

than Novex.

本题选d， 谁能解释一下，医院为什么更喜欢给病人开非处方药.

XDF-178

我觉得C有一点问题，就是所有能在同样土壤里生存的植物所共有的一个特性，并没有直接建立起这个特性和能够生存之间的因果关系。例如：所有能在这种土壤里生存的植物的茎里都含有水分，但显然水分和能够生存之间不一定有因果关系。所以，相对来说，E使H和生存之间的因果关系更为必然，更像正确答案。但令我感到郁闷的是，E里面有一个隐含的前提，就是H在植物当中的含量是有限的，这和文章中说H可以大量产生不一致，这也是E让人觉得别扭的地方。还有谁有别的看法的吗？

XDF-182

这个题目老让人觉得是不哪里漏了点什么没写出来似的。我一直搞不清楚，D到底削弱了什么？是削弱3/4医生开药，还是这个药是大家的明智选择？首先，这个药的非处方特性并不能证明医生就不会给病人开这个药；其次，应该分清文章当中到底哪个是事实哪个是结论，明显的3/4医生开药是事实，因此不可能是削弱的对象。我感觉D是想表达很多人选择这种药，不是因为它有效，而是因为在柜台上买不到竞争品牌的药。但D让我觉得不舒服的地方有两个：1）它并没有说所有的其他竞争品牌都买不到，所以还是有可能N比别的药有效；2）广告建议大家去买，和实际上有很多人买之间有联系吗？有没有大大牛给指点一下啊？

我觉得182要选C
Advertisement: For sinus pain, three out of four hospitals give their patients Novex. So when you want the most effective painkiller for sinus pain, Novex is the one to choose.

most effective的必要条件是3/4 hospitals give novex

most effective → 3/4 hospitals give novex

C给出他因，医院用NOVEX是因为药厂用最低价扩大销售。