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gmat数学概念的题目
数学概念的题目
OG202.
Gortland has long been narrowly self-sufficient in both grain and meat. However, as per capita income in Gortland has risen toward the world average, per capita consumption of meat has also risen toward the world average, and it takes several pounds of grain to produce one pound of meat. Therefore, since per capita income continues to rise, whereas domestic grain production will not increase, Gortland will soon have to import either grain or meat or both.
Which of the following is an assumption on which the argument depends?
(A) The total acreage devoted to grain production in Gortland will not decrease substantially.
(B) The population of Gortland has remained relatively constant during the country’s years of growing prosperity.
(C) The per capita consumption of meat in Gortland is roughly the same across all income levels.
(D) In Gortland, neither meat nor grain is subject to government price controls.
(E) People in Gortland who increase their consumption of meat will not radically decrease their consumption of grain.
Consumption 分成meat and grain. 此消彼长的关系
关于逻辑中数量范围的问题
数量的范围是逻辑题常考,特别是MUST BE问题,混淆答案也常来于此。下面一题是LSAT,先讨论,后再公布答案及解释。(VALARIE说得对,纪念完了,我们要更加努力去学习)
The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.
Which one of the following is most strongly supported by the statements above, if they are true.
A). All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.
B). Few species of animals live on a part of the earths surface that is not threatened by holes in the ozone layer
C). Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlig
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