再来两道

lala

5. Animals with a certain behavioral disorder have unusually high level of aluminum in their brain tissue. Since a silicon-based compound binds to aluminum and prevents it from affecting the brain tissue. Animals can be cured of the disorder by being treated with the compound.
The argument is based on which one of the following assumptions?
(A) Animals with the disorder have unusually high but invariable levels of aluminum in their brain tissue.
(B) Aluminum is the cause of the disorder rather than merely an effect of it.
(C) Introducing the compound into the brain tissue has no side effects.
(D) The amount of the compound needed to neutralize the aluminum in an animal's brain tissue varies depending upon the species.
(E) Aluminum is never present in normal brain tissue
选B。我觉得C也是一个假设：compound 治疗 disorder有用，需要假设compound没有副作用（如C所说）。在这种情况下，为什么选B而不选C？如何选择最佳的选项？

9. Manufacturers of coffee lighteners based on coconut oil claim that their products usually cause the typical consumer’s blood cholesterol to rise to a lower level than does the use of whole milk as a lighteners. Which one of the following, if true, provides the most support for the manufacturers’ claim?
(D) Consumers typically add to their coffee substantially smaller quantities of coconut-oil-based lighteners than of whole milk.
(E) Most consumers are convinced that whole dairy products increase blood cholesterol and that nondairy coffee lighteners do not.
选D，ABC都可排除，E也可排除。但我觉得说D项支持很牵强，您觉得呢？顺便想问：be convinced that意思是什么？

tongxun

lala：关于第五题。assumption的题型，正确选项的选择方法：推翻选项，则命题必错！
由此题(B) Aluminum is the cause of the disorder rather than merely an effect of it. 若铝只是一个由病引起的并发症，还能出现. Animals can be cured of the disorder by being treated with the compound. 的情况吗？
(C) Introducing the compound into the brain tissue has no side effects。只是没副作用而已，真的有效吗？要看是不是他引起的。打个比方（我的大学专业是临床医学）：肚子疼：若这么说，经研究发现肚子疼时，局部组织中细菌的含量非常高，而青霉素能大量杀死这类细菌，因此，肚子疼时就应该注射青霉素。你说这结论能成立吗？整一个江湖医生的论调。万一是寄生虫导致肚子疼，并拌有细菌含量高呢？我非得告此庸医不可。
其实，在此类体型中，若你真的没读懂题，象B这样的选项，我认为，超过90%的几率是正确选项。

tongxun

lala：在第九题中，咖啡伴侣与胆固醇升高关系上，我同意你的观点：选项太勉强了。勉强得让我不敢选择它。不知另外的选项是什么？能跟贴吗？不行，就告诉我是第几个section的或第几页、第几题，到时我再看看。

tongxun

lala：be convinced that意思是什么？
确信。