Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel.
Which of the following, if true, would indicate the most serious weakness in the plan above?
实战中遇到的情况:实战中和平时完全不一样。题目基本没有特别明显的语法错误,注意我说的是找不出特别明显的语法错误。语法错误肯定是有的,但是如果没经过manhattan顺考点这一步的话是真的特别难以发现。实战中遇到的句子我基本没见到超过半个屏的,都是非常短的。但是短的里面暗藏杀机啊。题做多了就会发现实际长句子更好做。因为句子长起来无非就是平行结构,还有就是依靠修饰从句这类很好分辨的结构。(则个要是看不出,还是别考了,先复习OG缓缓再交250刀)那些见到长句就以为自己进了高分库的同学要保持充分的清醒啊!!回到短句暗藏杀机上来,句子短了以后,就要特么全靠逻辑关系理了。修饰的平行都特别短小的让人抓狂啊。。。记着有个of .... and of and of的句子。。。哪个of跟着哪个词让我一阵阵纠结啊……
再难点的题就是那种存在逻辑关系的题。标志是therefore 之类表示因果关系的词。这类题目中大部分都是针对一个发展过程来说。典型的就是一种plan-goal的题目。比如某公司提出个方法,问这个方法能否实现啊之类的。 举例子如下: Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel.
Which of the following, if true, would indicate the most serious weakness in the plan above?
(A) Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms. (B) When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime. (C) Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel. (D) Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life. (E) Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel. 我把我是如何做这种题的方法写下: 先要筛选出如下信息:科学家要找出remove excess carbon dioxide from the atmosphere的方法,那个方法是通过一个by来引出的。这样的话可以很清晰的看出这个argument的一步步深入,存在一个目的,为了目的,需要一个方法。然后有些话来告诉这样为何行得通。同时要注意每个逻辑题干都是没有废话的,所以最后一句那个植物死后如何如何可能会是个关键点。后期的答题中不要忽略这个地方。在这样一个背景下,题目可以问的形式有很多,比如加强,假设,削弱之类的。(复习后期要对一个题干同时思考若干个题型的解答方向)。那么如果是加强:方向就是办法很行的通,选项里应该存在carbon 下降之类的肯定方法成功的词。削弱题的话就会出现:这样做可能是carbon不变。假设:这种方法不会产生carbon。。可能会有人疑问,这些猜的答案怎么可能会对呢?对不对的其实没关系的,关键是通过这种猜测培养对正确答案的敏感。 如此不停地猜,不停地对或错,做CR的思路自然就符合了GMAT的要求了。就像这个题,所有的猜测都是指向carbon量的变化的。所以在选选项的时候基本就很有数了。
如果说这类题让人抓狂的话,那在OG上还有类就跟让人疯狂了。上面的题有明显的逻辑关系。然而有些……
看例子:
Although the discount stores in Goreville’s central shopping district are expected to close within ? ve years as a result of competition from a SpendLess discount department store that just opened, those locations will not stay vacant for long. In the ? ve years since the opening of Colson’s, a nondiscount department store, a new store has opened at the location of every store in the shopping district that closed because it could not compete with Colson’s. Which of the following, if true, most seriously weakens the argument? (A) Many customers of Colson’s are expected to do less shopping there than they did before the SpendLess store opened. (B) Increasingly, the stores that have opened in the central shopping district since Colson’s opened have been discount stores. (C) At present, the central shopping district has as many stores operating in it as it ever had. (D) Over the course of the next ? ve years, it is expected that Goreville’s population will grow at a faster rate than it has for the past several decades. (E) Many stores in the central shopping district sell types of merchandise that are not available at either SpendLess or Colson’s