第二段没太读懂就做题了。 Broadening the range of trial participants, Frazier and Mosteller suggest,说明这俩人建议拓宽病人渠道，所以其他researchers的限制病人渠道的方法肯定是被否定的，所以一定是选描述它负面的选项。这样基本就只有A了。

E 强调help

表因果关系，而非伴随状语

because of 和 by
体会语意上的变化

thus leaving 【no】 low gravity anomaly in the resulting basin
anomaly n. 异常；不规则；反常事物

初步定位："Scientists speculate that ...Thus today such gravitational compensation"一节
再次定位：gravitational compensation--- compensating for the ejected material---Scientists speculate that...denser 【material from the Moon's mantle rose up】beneath the impactors almost Immediately, compensating for the ejected material and thus leaving no low gravity anomaly in the resulting basin
从句中impactor struck与compensation无关,是导致debris ejected的原因。
upwelling 上涌

upwelling 上涌

定位错误：错误的定位至This central role of the Black Death (traditionally attributed to bubonic plague brought from Asia) has been recently challenged from another direction，然而 This central role of Black Death（而不是zoologist Graham Twigg's urban case studies ）才是post-Second World War studies that altered the prevailing view of the Black Death，问这个study涉及什么

Dismissive：轻视的 Vindictive：报复性的

这道题选错只是因为太polite了

qualify 限定

He became as well known for A as for B, 表示比较的是for A VS for B，“正如因为B（他变得有名）一样，他出名因为A”。ok
=He became well known as much for A as for B
=He became well known for A as much as for B

silver lining to the Black Death: prosperity engendered by diminished competition for food, shelter, and work led survivors of the epidemic into the Renaissance and subsequent rise of modern Europe.

TQM shares with such systems the ultimate objective of increasing profitability, TQM requires fundamentally different strategies.

qualify a claim限定一个claim

文They conclude that the postwar demise of this vital alliance constituted a lost opportunity for the civil rights movement that followed the war. ——他们认为这一重要同盟关系在战后的终止是导致战后公民权利运动缺乏机会开展的原因
题The civil rights movement would have benefited from a postwar continuation of the wartime alliance between trade unions and the African American community

题目的关键在“经济可行性阈值”这个概念，一个背景知识是：当前世界上大多数国家或者地区为了发展清洁能源，燃油发电的阈值需要提高，因为由于历史原因，目前燃油发电的成本依然是偏低的。
就这道题来说，我们假设发每单位的电，太阳能发电成本为100元，燃油发电实际成本需要65元，但国家为了发展太阳能，使它更具经济型，所以会使燃油发电成本提升超过太阳能发电，这里近似提升35元，那么这个提升的35元，就叫做“经济可行性阈值”。
如果太阳能发电成本降低，比如每单位电降低到90元，如果燃油发电成本不变，那么“经济可行性阈值”是要降低的（25元）
但是如果如C选项所说，燃油电厂的效率也提升了（成本降低），比如降低至每单位电55元，那么这时，经济可行性阈值是不变的，依然是35元，所以C选项正确。

complete后面加代词是多余的，主语已经是兵马俑了，complete后面再加指代兵马俑的代词就变成了“兵马俑花费了工匠36年去完成兵马俑”，很明显这是很啰嗦的。

it/they同物指代，that/those异物指代
这个句子可以改写成：
more than ten times as much energy is generated through wind power now as in 1990 或 as that in 1990 或 as was the case in 1990

so/such/case可以指代句子/一件事情，如：
No one do so, even though there are more apples in the trees can be picked this year.
The sun ejects red fire, as is the case with any star of similar mass.
Cells secreted hormones, in which case they were endocrine cells.

INTEGER!!!!