扫描二维码，直接登录
题库 / OG2019-CR-570
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?
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.
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.
Increasing the yields per acre of rice,wheat, and corn is more important than increasing the yields per acre of other crops.
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.
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.
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。
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. - Correct. Negate and the conclusion also gets negated.
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. - If anything, this option opposes the conclusion. Since there is already an increase by more than 1.5%, should the government provide the funding?
https://gmatclub.com/forum/farmer-worldwide-just-three-grain-crops-rice-wheat-and-corn-accoun-268511.html
我做题时的想法是：
1.P&C
p：要增产
c：要投钱
2.推理方式：因果推理（原题逻辑有个therefore）
3.预判：
CQ1：干扰因素：是否存在干扰因素使得投钱就不能增产
CQ2：A与B的逻辑关系：是否投了钱就一定能增产
4.匹配：CQ2
不知道这种思路可行不
1.提炼P&C
目的：improve yields
方案：increase funding for research into new ways
2.判断推理方式：方案推理
3.评估预判：
CQ1：方案可行性问题：
CQ2：方案可操作性问题：因果联系不正确，反驳结论
CQ3：方案副作用问题
4.将选项和CQ进行匹配
CQ1：B选项
想办法提高产量（yield)，就说明以前用谷物造的食物浪费的太多，现在同样的谷物量提高造这些食物的production（选项B的assumption)，就间接的节约了谷物的产量。
为何我好多题都和毕老师的模型不一样。我总觉得therefore后的当成结论比较合适。所以这题：1.5%增长------政府资助。B正好是加强因果之间的联系
方案推理
文章说土地减少，但是人口数量在上升，需要government funding。那government funding被认为可以达到亩产增加。
原文的gap在于，政府花钱研发出新品种了，提高谷物的单位产量了，就意味着明年一定可以大丰收？并不是，这中间存在很多问题：新品种的普及程度如何呢？一定能保证所有农民都用上新品种？如果只研发出新品种，但普及不了，那全国年产量还是无法提高啊
方案推理！
因果推理 因为yields diminishing 所以政府要开始研究提高收成的方式 去提高yield
b选项取非 研究根本无效 不会提高yield 也不会使大家吃上饭 削弱了