GMAT考题 OG2019-CR-570,CR批评性推理真题解析

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Farmer: Worldwide, just three grain crops—rice, wheat, and corn—account for most human caloric intake. To maintain this level of caloric intake and also keep pace with global population growth,yields per acre from each of these crops will have to increase at least 1.5 percent every year, given that the supply of cultivated land is diminishing.Therefore, the government should increase funding for research into new ways to improve yields.
Which of the following is an assumption on which the farmer’s argument depends?

A. It is solely the government’s responsibility to ensure that the amount of rice, wheat, and corn produced worldwide keeps pace with global population growth.

B. Increasing government funding for research into new ways to improve the yields per acre of rice, wheat, and corn crops would help to increase total worldwide annual production of food from these crops.

C. Increasing the yields per acre of rice,wheat, and corn is more important than increasing the yields per acre of other crops.

D. Current levels of funding for research into ways of improving grain crop yields per acre have enabled grain crop yields per acre to increase by more than 1.5 percent per year worldwide.

E. In coming decades, rice, wheat, and corn will become a minor part of human caloric intake, unless there is government-funded research to increase their yields per acre.

正确答案:B

情景:农民:人类热量摄入的三种主要谷物:大米,小麦,和玉米。为了维持这个摄入量以及保持和人口增长的同等速度,在耕地减少的情况下,这三种谷物每公顷的产量至少每年增加1.5%。因此,政府必须资助新的提高产量的方法。

推理:目标:每公顷的产量必须增加

方案:政府要增加资金以研究新的提高产量方法

此题为方案推理。问题问前提,那么选项取非后需起到对方案的削弱作用。

选项分析:

A选项:保证三种谷物的生产量与全球人口增长同步仅仅是政府的职责:取非后,不仅仅是政府的职责,但职责归谁和方案能不能达成目标没有关系。

B选项:正确。增加资金会提高三种谷物每年全球生产的食物总量:取非后,增加资金并不会提高食物总量,那既然不会提高,增加资金就是一个无效的方案。属于方法可行性问题(达不到目的)。

C选项:提高大米、小麦、玉米的每公顷产量比提高别的作物的每公顷产量重要:无关比较。

D选项:目前的资金资助水平已经能确保作物的每公顷产量增加1.5%:取非后,目前的资金水平不足以使产量增加,那么政府更应该多注入些资金,取非后起到了加强作用。

E选项:在接下来的几十年,除非政府注入资金予以支持,大米小麦玉米将会变成不重要的热量摄入源:政府不支持的话,这三种作物就会变得不重要,那政府没必要支持,大家从别的渠道摄入热量即可,取非前就起到了削弱作用。

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