天山3~Q37

[CUGGYER]

Q37:



Because mining and refining nickel is costly, researchers have developed an alternative method for extracting nickel using Streptanthus polygaloides, a plant that absorbs and
stores nickel form the soil as it grows. The researchers incinerated a crop of Streptanthus
they grew in nickel-rich soil. By chemically extracting nickel from 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 on 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.

答案是B

CDE都weak concluson 先排除

A B選一個我選了A ><

仔細看過選項後 B的確較好 但是我看不出A哪裡錯

[Pufa]

A削弱作者的結論。
A說那次種植該植物的季節『異常的良好』，讓採金者用較少的成本就可以達到最大的產出。

表示這種好天氣很少見，即使這好天氣帶來最大產出，但也還是造成這個新方法的成本比舊方法還高。

[CUGGYER]

又是沒讀懂的問題>< 謝謝解答