来自ron：
A和E错误：both of these choices are wrong for the same reason: neither of them specifies what we are taking percentages of.
you need to say 43% of californians or 43% of the population of california or 43% of... something.
还有就是it的指代问题！

感觉正确选项有点改变原意了。。但没办法只能选他了

Ron：This is a really, really old problem (over 10 years old, if it\'s in \"set 27\"). The current GMAT won\'t test such oddly constructed sentences, so it\'s best to forget about this one altogether.

prep08语法笔记：两个并列分句中，当谓语动词为系动词或者become时，后面一句一定要省略。并且and一并省略。
还原倒装：Frances Perkins' investigations of the garment industry were so dogged, her lobbying for wage
and hour reform (was) so persistent, that Alfred E. Smith and Franklin D. Roosevelt recruited Perkins to
work within the government, rather than as a social worker.

intent +to do sth
而不是
intent of doing sth

C."rules intending..." is incorrect, since the rules aren't intending to do anything. rules don't have intentions, although their authors do.
this is a passive type construction. the rules are intended to do x, y, and z, so you need "intended", not "intending".

①at least的位置=》排除BE
②triage=》将伤者按照严重程度分类进行医治
put through triage是去修饰patient

Krech also contradicts Martin's exclusion of climatic change as an explanation
M认为气候变化不是影响因素，而K认为气候变化是次要的影响因素

C选项说了其他时代，但是文章没有说其他时代没有灭绝

没明白题意，commend称赞 因此要选择一个正向的词
his argument is impressive when he applies the Marxist concept of "de-skilling"

此题破题点关键在于结论句的 ten years from now, 说明十年后的情况和现在基本没有变化，这就要说明P里陈述的读书情况是一个普适性trend
C. has always been low就说明了该情况可以一直延续下去
A. 两个年龄阶段的人数对本题没有影响，要关注的是各个年龄阶段的人 读书比例 是否有变化

the real issue with (b) is that it can be read as "...dissipated by boundaries".in other words, choice (b) seems to suggest that the boundaries themselves can dissipate the acoustic energy; this is the opposite of the intended meaning. actual meaning is that boundaries are helping in preventing the dissipation of energy..

proponent试图用cook造成营养流失来掩饰 irridation造成营养流失
beside the point: 有的食物不用cook——不存在cook造成营养流失，比较无意义
C. 使用步骤和用途 对是否造成营养流失 无影响
E. cook和irridation的影响会叠加——cook无法掩藏irridation的影响, 比较Misleading

you can use "that of Y" in parallel to either "NOUN of X" or "X's NOUN".
E选项decline +by+ 百分比或数字

D选项的and so表示前面整句话的结果，但是原文不表示整句话而只表示that后面的句子。

emmm 所以如果选项中没有否定词的一般就不是正确选项？

谓语动词用is，主语是the rate
as seen基金修饰tree growth，而C选项修饰sunspot cycle错误
on earth位置没有e好

平行
D和E中的it只能指代与前文完全相同的事物，否则用that

cost低（pesticide/decline）✖️quantity（norm/？）=revenue
？就是缺少的产量

None of the materials in Renaissance oil paintings other than the paint
不是无关选项哦！！！！！！