比较的题型：1）比两样东西（名词），2）比两个动作（动词）。
这里比较的是两个动作，所以，有一个省略用法 [sub+verb]+modifier，只保留modifier，选C。
如果是比较两个东西, 比如circulation in.... is lower than that in ....，就应该是D。
（newspaper）{had} 《lower circulation》 in the six months than（newspaper）{ had} in a similar period
改写为两个东西比较：the circulation of newspaper in the six months is lower than that in a similar period
定位：but population ecologists had usually considered viral disease to have contributed to the "decline" [once it was underway] rather than to have initiated "it".
句子结构理解不到位，“once it was underway”是修饰decline的！！
研究者发现：1想要探寻改变life circle的因素（这是研究的目的，要搞清楚）； 2）通过改变habitats，或者减少了毛毛虫的数量的办法 change life cycle； 两者都没有成功（排除法）
conclusion:这些虫子如果不是自我调节，就一定有个和昆虫更亲密的东西在调节life circle
A/B/C/E选项："The throughput needed to maintain the optimal scale of production requires careful coordination not only of the flow of goods through the production process(B)(C), but also of the flow of input from suppliers and the flow of output to wholesalers(A) (E)and final consumers."
D选项：a manufacturer's throughput could be adversely affected by unit costs rise sharply VS. 文中： If throughput falls below a critical point, unit costs rise sharply ；前者说throughput被cost影响，后者说throughput会影响cost，因果方向相反
there be句型通常的问题是没有逻辑主语，如果看不出来，就加入连词考虑其逻辑：
因为这里有一个海商法，所以这个海商法引起了争端。
显然地，两个小句间不存在因果关系。若想令小个单句间存在因果关系，前一个单句的核心词必须是provision/provide，即，事件：
因为海商法的一个规定，所以这个海商法引起了争端。
首先没有equally....as这个结构，排除ABC
D中的be likely that这个结构错误
且D中的比较对象错误，误比“他们过去标准下会超速”与“现在的标准”比较，而应该是“司机们将会有的情况”和“司机们现在的情况”而不是现在
E中的比较结构还原后为
Traffic safety officials predict that drivers will be as likely to exceed the proposed speed limit as they are likely to exceed the current one
A选项：①不能是can tend！
②there's also the problem with "if [participle]" -- a modifier that, by convention, refers to the SUBJECT of the sentence (not the proximate noun).
for instance:
Animal 1 will attack animal 2 if injected with enough of the hormones related to aggression.
--> in this sentence it is animal 1, not animal 2, that is being injected with hormones.
D选项：主谓抽出来应为jay can remember and tends to
it tends not to bother recovering a perishable treat stored long enough to have rotted.它往往不会费心回收一种易腐烂的食品，这种食品储存的时间太长，以致腐烂。
stored long enough to have rotted作定语，修饰treat，指食品具有被存储太久以致腐烂的性质
A选项：代词it的指代对象为语境中合理的单数名词。本身其在逻辑上指代the mystical level of reality没有问题，但是，由于本题中the mystical level of reality和the material level是在同一个both and短语中的，即，两者被融为了一体，所以这造成了it无法单独指代the mystical level of reality的问题。另外，directly是副词，只能修饰动词have或者介词短语with an ichana (dream) experience等非名词成分，但在逻辑上，其应修饰名词contact，即，直接的接触。
关于C选项的知识点补充
"the last" is incorrect.
* "former/latter" should be used only when there are exactly two things.
* "last" should be used only when there are three or more things.
i think that "first" can actually be used in either of these two situations (in contrast to "last", which shouldn't be used unless there are 3 or more things), but i would want to see official GMAT evidence before making a conclusive judgment on that issue.
A选项：首先，定语从句which is the removal of only selected trees有误。将先行词代入从句则有：
logging is the removal of only selected trees.
提取主干后可知：
logging is the removal
在逻辑上，显然伐木不能是移动，而是伐木发出了移动这个动作。
另外，either…. as well as…搭配错误，应该用either…or…。
最后，现在分词短语burning down individual trees做surface fires的定语是没有问题的。但是，注意到未划线部分but do not denude the forest在逻辑上也应是surface fires的定语，因此burn事件和denude事件应是平行的，即，burning down individual trees需改为that burn down individual trees。
D选项：本选项迷惑性最大。平行触发语either…or…连接的平行应是两个名词的平行，即，either A or B。【这和两个名词身后的"定语"在形式上是否平行没有任何关系！！】
本选项的错误是现在分词短语burning down individual trees和denude事件不平行（注意划线部分后的动词以辨别动词平行形式！！）。
A&D选项： 【，with】状语，修饰动词publish，而后边的东西明显应该link到那个名词才对；(e.g. D选项中with a thesis that is a simple one是一个介词短语，其看起来可以是主句the Council on Economic Priorities began publishing Shopping for a Better World的状语。但在逻辑上，应该是Shopping for a Better World这本杂志的主题，不能是publish的主题。）
A选项：介词短语of consumers having the power to change companies by the simple expedient of refusing to buy是the simple thesis的定语，这个定语部分的核心词为consumers（having the power是现在分词短语，做consumers的定语）。在逻辑上，一个简单的主题应该是一件事，即，消费者有改变的权力，而不是消费者本身（一定是消费者做了什么事为主题，没有消费者的主题）。因此，这个介词短语应改为一个同位语从句。
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。
shifts are so gradual as to be indistinguishable意思是shifts 太缓慢了以至于不能被区分
able/unable不能由抽象名词发出
扫描二维码，直接登录
“谎言产生了情绪反应”这个事件不会直接影响“情绪反应会引起无意识反馈”这件事的发生与否。这是因为，不论谎言是否引起这个情绪反应，该情绪反应均会引发无意识反馈。注意第二个事件是“反应引起反馈”而不是“引起反馈“”，是两个事件的比较而不是两部分的简单比较