Animals with a certain behavioral disorder have unusually high levels 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 to 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. 答案是B, 但我选C 主要是因为那个merely, 也就是说aluminum 不仅是结果, 更加重要的是他是原因, 这样的话答案就不如C好 哪位能帮我解惑? side effects 是副作用的意思!
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发表于 2009-9-12 15:01:00
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