T-3-Q37.

jaffa23

Because mining and refining nickels is costly, researchers have developed an alternative method for extracting nickels using Streptanthus polygaloides, a plant that absorbs and stores nickel from the soil as it grows. The researchers incinerated a crop of Streptanthus they grow in nickel-rich soil. By chemically extracting nickel form the ash, they produced 100 pounds of nickel per acre of land at a total cost per pound slightly above that of current mining.

Which of the following, if true, most strongly supports the conclusion that the use of Streptanthus to extract nickel will be commercially adopted?

A.    The season in which the researchers grew Streptanthus was an unusually favorable one, with the right amount of precipitation to maximize the growth rate of Streptanthus.
B.    Because lowering the concentration of nickel in the soil can make land much better for agriculture in general, a plot in which Streptanthus has been grown and harvested can be sold for substantially more than it cost
C.    More air pollution is generated for each pound of nickel produced by extracting it from Streptanthus than is generated using conventional mining and refining
D.    The land on which the researchers planted Streptanthus was unusually free of the various weeds that can compete with Streptanthus for water, nutrients, and sunlight.
E.    It is extremely rare for soil to contain higher concentrations of nickel than the concentrations present in the researchers’ experimental plot.

蓝的是我选的，红的是正确答案。
感觉什么正确答案和题干无关呢？题目讲的是烧木取矿，问支持。
正确答案什么读起来像在说卖地呢？

queenie924

问支持，commercial adopted我觉得就是要着眼于经济利益上。首先，LZ选的这个跟weed营养有关，跟是否cost benefit analysis无关。所以应该是无关选项。
而B的意思是，虽然这样的新方法，cost是有点高，但是从地的角度看它可以卖出好价钱，就cover掉了之前的cost。所以试行新方法还是有收益的。

希望这样可以给你帮助。

angelsgx

Because mining and refining nickels is costly, researchers have developed an alternative method for extracting nickels using Streptanthus polygaloides, a plant that absorbs and stores nickel from the soil as it grows. The researchers incinerated a crop of Streptanthus they grow in nickel-rich soil. By chemically extracting nickel form the ash, they produced 100 pounds of nickel per acre of land at a total cost per pound slightly above that of current mining.
原文说：是否提取N，价格高不高
Which of the following, if true, most strongly supports the conclusion that the use of Streptanthus to extract nickel will be commercially adopted?

A.    The season in which the researchers grew Streptanthus was an unusually favorable one, with the right amount of precipitation to maximize the growth rate of Streptanthus. 说season如何 无关
B.    Because lowering the concentration of nickel in the soil can make land much better for agriculture in general, a plot in which Streptanthus has been grown and harvested can be sold for substantially more than it cost 说N的浓度，S价格和原文由关
C.    More air pollution is generated for each pound of nickel produced by extracting it from Streptanthus than is generated using conventional mining and refining 说AIR POLLUTION无关了
D.    The land on which the researchers planted Streptanthus was unusually free of the various weeds that can compete with Streptanthus for water, nutrients, and sunlight. 说WEEDS和S抢各种资源 无关
E.    It is extremely绝对化 rare for soil to contain higher concentrations of nickel than the concentrations present in the researchers’ experimental plot.

momohe

up
其余几项都无关

teddyabc

恩，关键看问题问的是什么。。。。。。我以为原文有比较选项必有比较，看来也不一定~~
只有B直接与economic有关。

winny0821

D项是无关项啊，而且还有点削弱的作用。 因为这块什么什么的地是unusually free。。。。。的。说明这块地特殊，不易推广，经济上不可行，削弱了论证