the time required for a stroke is exactly equal to the time interval between strokes。认真读题。阅读需加强

想了半天..应该是因果推理吧。。有一个细菌在同一星球就相似的理论，推得地球上的细菌都是地球上的，就算有过火星来的也灭绝了。然后most vulnerable的地方是，也存在地球上的细菌都来自火星这种可能

请教下为什么having been based on crashes 不能做 company's research 的同位语？

知道了， 应该用these/those studies来替代

为什么这个they不能指的是 studies？

a controversy concerning the significance of evidence from ALH84001：significance——究竟是否意味着暗示火星生命的存在

as可以表举例吧？GMAT中不能表举例的是like

https://e-gmat.com/blogs/schistosomiasis-a-disease-caused-by-a-parasitic-worm%E2%80%A6gmatprep/

Choice D: This choice has similar error as choice C does. In addition, this choice is more wordy since it does not use pronoun “its”. It repeats the noun – parasite’s.
Choice E: This choice has similar meaning error as in choice C. It also has pronoun number error as in Choice B.

更正1-比较结构是成对儿出现的，less +than，没有less ...compared这种说法，因此i排除ABD；
2-E和后面的题干分别是两个独立的句子，之间需要连词，nevertheless是副词，不能够链接两个句子，错误１；另外E中比较的是在不同的地点，其实发生的时间上也有比较，未体现出来，错误２；排除E；
综上，选C

我也觉得是因果推理

E) Using water would continue being restricted because not any appreciable increase in the level of the river
- "not any.." is unidiomatic and can be replaced by simple "no.."
- Also missing "had" at the end, distorting the temporal relationship between "increase in level" and "intermittent rain"

C) the use of water would continue to be restricted because not any appreciable increase in the river's level had
- use of "the use of water" leads to unnecessary passive voice
- "not any.." is unidiomatic and can be replaced by simple "no.."

B) restricting the use of water would continue because there had not been any appreciative increase in the river's level that
- "appreciative" is incorrect
- "that" seems incorrect modifier

A) restrictions on the use of water would continue because no appreciative increase in the level of the river
- "appreciative" is incorrect
- Also missing "had" at the end, distorting the temporal relationship between "increase in level" and "intermittent rain"

Analysis:
1. "appreciative" - showing gratitude VS "appreciable" - noticeable - Slight difference in word but huge difference in meaning. And "increase" can not be appreciative.
2. "Restriction" should be the main subject to convey the meaning succinctly.

maintenance和film在第一句话里的as well不已经表明了是并列关系吗？如果按照答案的理解，那不就成了film的相关动作也是maintenance的一部分了吗？

为什么没有声音呢？

D选项，即便定向广告质量没增加，只要定向投放的顾客回复率高，说明方案依旧有效。所以D是out of scope

注意方案的目标：intended to help poor farmers
argument反对的是这样做会损害发展中国家农民的利益，但发展中国家的农民比例是不是占大多数呢？多少会影响到总量？