关于B，有些科学家说PAH可能来自terrestrial contamination（有可能来自地球上的生命活动）
nonbiological processes是下一个论点的东西，而且是M提出来支持自己观点的。

这道题已知一个两线交点，k线穿原点，可以确定k的斜率，又知道两斜率乘积，不就可以确定另外一条线了么？

DO NOT MAKE ANY LEAPS OF LOGIC and DO NOT BRING IN YOUR OWN INFORMATION. Everything has to come from what's written

在那一部分文章中没有提到 retailer's attempts to predict demand more accurately

90＝2x3x3x5
196=2x2x7x7
300=2x2x3x5x5
最小公倍数＝2x2x3x3x5x5x7x7
2x2x5x5构成100，剩下的构不成6

the word "have" in choice (c) creates a slight but noticeable change of meaning (remember that you have to read VERY literally). specifically, it shifts the focus to those fish that have the eggs, i.e., are in literal possession of the eggs. that's not the point of the sentence; the point is just that some fish produce eggs that require months to incubate, whether they "have" those eggs or not.

"making xxxx" is a consequence of the action. If you write "a deal making xxxx", you're implying that the deal is making xxxx at the time of the action described.

E.g., if you write My teenage daughter wears skirts over leggings, exemplifying a trend sweeping the nation, you're implying that the trend is already "sweeping the nation" right now. If my daughter's actions start the trend, this sentence isn't accurate.

"a part of a deal" is CONCRETE, so it stands for the preceding noun.

the death stroke for that answer choice is the 'for protecting' part; that simply isn't idiomatic.
both versions of the latter half make sense - 'against both american and irish competition' is just as reasonable as 'against american, as well as irish, ...'

“”managerial error in estimating the value of firms“”

A哪里不对呢

The in vs. between issue is an idiom. I say differences in X (just one thing) or differences between X and Y (two things). This sentence has one thing: how the two ears hear a given sound. So, I need "differences in." Elim D and E.

some things wrong with c:
* the placement of 'on earth' is just as problematic as in choice a (again, the sentence seems to be saying that residents of other planets disagree with us).

* 'as seen in the rings...' is a modifier that must be placed next to the thing that it modifies, which is 'the rate at which trees grow'. the way choice c is currently written, it says that indications of sunspot cycles can be seen directly in the rings - and it also implies that sunspot cycles (instead of trees) have rings!

A says that tree growth is believed to be a good indicator by people on earth
and finally, yes, 'the rate that' is simply... wrong. things don't 'happen a rate'; they happen at a rate, so that preposition has to stay.

restriction反对广告中不写明价格，也就是说restriction取消后，广告中可以不写价格。错选D，第一句错了，律师不应该在广告中写价格。

these foreshocks indicate nothing about the magnitude of an impending quake and are indistinguishable from other minor tremors that occur without large earthquakes. 错选了A. 感觉这题还是用排除法更好一些，直接做我怎么也不敢选C

过去分词修饰离得最近的 society，这和前面科学家basing on...不一样；such ... as列举，不能用Like；后面的一系列名词要保持平行。

本体作主语，estimate to be；属性作主语，estimate at

（1）excepting用到否定句中，excepting for不对；（2）with the exception of应该没有错，但是此题表达在什么领域，所以需要in