Ruboo公司生产“这种”轮胎不能带来利润

这题选错了。A选项的比较对象是this year和last year,比较对象上没有问题。记住啦～

讲道理，B中有个some啊，这就不能评估other compromises（包括逻辑链相关）的情况了吧

MARK.
the balance 表示余下的部分，即80%和60%

correction for my last post:
the correct answer should weaken the conclusion in both ways: weakening the validity of effective control and the cleanest technologies at the same time.

this sentence is the conclusion: This method allows for effective control of nuisance algae while leaving solar ponds as one of the cleanest technologies providing energy for human use.

we want to weak the conclusion->how? ->weakening either the validity of "effective control" or the one of "the cleanest technologies" is fine.

并不是并列的关系，而是有因果的递进

MARK. 果因推理。
开始没看懂句子关系。

在阅读里问个语法题……文章第一句
More selective than most chemical pesticides in that 【they】 ordinarily destroy only unwanted species, biocontrol agents (such as insects, fungi, and viruses) eat, infect, or parasitize targeted plant or animal pests. 这个they是指前面的chemical pesticides还是后面的biocontrol agents呢？ 按照语法来说应该是前者吧……

神题。被绕晕了

a选项快速判别的应该是which的指代错误吧，which应该指代最近的一个名词，那就是paralysis了

without none，nor 奇奇怪怪的东西不要瞎选
E里面without A or B，其实or后面省略了一个without

B选项：having their ability to survive是伴随状语，可以表达两个小句间的因果关系，但是，本选项会引发赘余的情况。由于伴随状语的逻辑主语和其主句主语相同，所以本选项中的伴随状语在逻辑上为：
Turtles have their ability to survive on weekly or even monthly feedings.
显然地，their是赘余的。乌龟肯定是拥有自己的能力，不可能还拥有“别人”的能力。因此应该写为：
having the ability to survive

认真消化！！！

注意although和even when语义上的差别。

capable of inflicting injuries as serious as those 作为属性修饰gadgets。

反正being出现基本都是错的了

either of these two interpretations leads to an absurd sentence -- neither the method (= NOUN1) nor the mineral (= NOUN2) "was as early as the 18th century" -- so this option is flat-out incorrect. from Ron about why D is incorrect

D选项最高级most前需加定冠词the。

理解句子的含义，句子意思是“TE' powerful style and his choices of subject在他所在的时代是disturbing，但在现在是compelling to us”，即要选的选项要表达出时间上的不同。B/E选项中，E选项没有表达出时间上的不同，而B选项正确表达出时间上的不同。

here are a few singular entities that “it” may refer to. These entities are “spending” and “the presidential campaign of 1992”. However, none of these entities are logical antecedent of “it”. Hence, presence of this pronoun makes this sentence incorrect.
from GMAT club 意思就是A中的it是不能指代a great proportion的