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

PRS = QPR + PQR
所以只要知道QPR的角度即可求处PRS 比PQR 大多少
看清楚指的是什么角

PRS = QPR + PQR
所以只要知道QPR的角度即可求处PRS 比PQR 大多少
看清楚指的是什么角

DE本质前后没有强烈的因果关系

这答案怎么看都不对啊，D选项除了油漆其他的环境影响都不大，那就是油漆被环境影响的大喽。那这不是和题干是反的么

so...as to...与so...that...表达的意思一样，均为“太…以至于…”，一种因果关系。他们的区别在于，so...as to...用于主语和to后面的动作的发出者一致时，而so...that...中，主语与that之后的主语不需要一致。

但“经济变化是缓慢的”这件事导致的结果直接是“经济变化 是 难以辨别的”，而不是 “可以是”。也不是“没有能力被辨别”。

research在本选项中是及物动词，身后直接加宾语即可，不用再加介词短语（只有不及物动词才需要加介词短语来构成及物动词短语）。
while是连词，身后应该加完整的句子（表伴随状语时可以加分词短语），不能只加介词短语。

If these doctors drank more coffee, their likelihood of having coronary disease was greater.
可能性并非拥有的，而是客观存在的，所以是ing

解释的不对，不要看
attribute to和result重复

proposed：计划的，提议的。
current one与proposed speed limit对应