the REAL issue, though, is "unqualifying" -- this is incorrect. "unqualifying" means "not meeting some sort of standard for qualification".
the intended meaning here is "unqualified", which means "without any sort of restriction or reservation". 无条件的

Ron： i'm loath to use apostrophe + "s" for anything but humans, animals, and the like. ‘s’更偏向一个人

They conclude that the postwar demise of this vital alliance constituted a lost opportunity for the civil rights movement that followed the war.
Demise 终结

好家伙，曼哈顿上写的集合名词大多数是单数，这里就给我脑筋急转弯

C 没有关于E的古代评论
题目说的，L(中世纪手稿中)没关于E的古代评论，进一步放大范围是中世纪手稿中没有关于E的古代评论。

D M在L（中世纪手稿中）有关于古代评论，推不出M在中世纪手稿中没有评论。
E E在L（中世纪手稿中）没有评论，可能推出E在所有中世纪手中稿没有评论。

圆桌题=n!/n

该问题明确提到了需要寻找的关键-金融工具（股票，债券）
由于答案的选择需要以股票或债券不平等为例，B正确显示了大小投资者在购买股票时收取的费用方面的不平等。

语义和逻辑：这个实验的设计为了提供信息，证明遗传疾病的治疗是有用的信息，获得这种信息的方法是给老鼠移植骨髓。

解释的不对，不要看

expect automakers that they will 错误
只能是expect that automakers will或者expect automakers to

理解语义

like在GMAT中通常做介词表示“像…一样”，要求前后严格对称，但不可表示列举。

cloud不是云，是指一团，一群

D选项的with为什么不行呢，觉得低失业率伴随快速增长的经济挺合适的啊？

1) [so that] is used to show intent. (He did X, so that Y can happen.) 'so that' implies that chimpanzees are actually thinking, 'Hmm... if i exhibit curiosity, then i'll be able to catch on to my fellow chimps' behavior patterns. Hey, that sounds like a great idea! I think I'll do that!" ...no.
2) [where] is used to literally denote physical location.
3) [by which] here is a simple example Theorem X was proved by induction by several professors. ('induction' is one method used to prove mathematical theorems) This chapter introduces induction, the method by which theorem X was proved by several professors.
4) ["imitating and practicing" VS "imitation and practice"]
the sentence is written very specifically to emphasize the curiosity per se.
ironically, the sentence is written expressly to MINIMIZE the importance given to the chimpanzees themselves!
if the point was to emphasize the involvement of the chimps, then the sentence would be written with the chimps as the subject. this would be quite easy to do: ...they transmit patterns of behavior by imitating them...
instead the author has taken a sentence whose earlier subject is the chimps and has specifically changed the sentence (into a passive form) so that the chimps ARE NOT the subject anymore.
that's a pretty strong indication that the point is to de-emphasize the chimps, and to emphasize the cognitive p

J收据数据发现，黑猩猩表现出一种好奇心, 通过这种好奇，新的行为和表达模式可以通过模仿和实践从一个猩猩传递到另一个猩猩

啥解释。。农民？seriously..wtf?

（1）xy同号 单独NS
（2）NS
(1) + (2) x，y都是正数 因为负数加上另一个负数不可能>0
所以x是正数，> 0, sufficient

如果需要分情况讨论的两种情况都是一个结果，那么就可以确定
（不要看到分情况讨论就觉得insufficient

(1) vk > 0
V and K can be either positive or negative, ranging from 1 to infinity on both side of number line.
(insufficient)

(2) v - k = 6
There are many possible combination with the given equation to determine one possible answer.
(insufficient)

Combining both : let v and k are positive integers
7-1 = 6, 8-2 = 6, ......... there are many possible combinations as the case with negative integers.
(insufficient)

(n + 4) - (n + 2) - n = -n - 2
已知n 是正奇数
-n必是负奇数
奇数和偶数的合是奇数
所以说是负奇数

DS 要时刻提醒自己 看清楚题目问的是什么 有时候不需要算出具体数值