boldface 2的答案异议

2. A double-blind study, in which neither the patient nor the primary researcher knows whether the patient is being given the drug being tested or a placebo, is the most effective procedure for testing the efficacy of a drug.      But we will not be able to perform such a study on this new drug, since the drug will have various effects on the patients’ bodies, which will make us aware of whether the patients are getting the drug or a placebo.

The two portions in boldface play which of the following roles?

(A) The first is a general consideration that introduces the argument; the second is a special situation that weighs against the first.

(B) The first is a general principle that is necessary for this argument; the second is an anti-consideration that the argument includes.

(C) The first is a premise that this argument includes; the second is a main idea that can be drawn from this argument.

(D) The first is an evidence that this argument includes; the second is a conclusion that can not be drawn from this argument.

(E) The first is a general situation that supports this argument; the second is a conclusion that can be drawn from a special fact.

参考答案: B 思路：A double-blind study, in which neither the patient nor the primary researcher knows whether the patient is being given the drug being tested or a placebo, is the most effective procedure for testing the efficacy of a drug.(principle) But we will not be able to perform such a study on this new drug, since the drug will have various effects on the patients’ bodies, which will make us aware of whether the patients are getting the drug or a placebo. (anti-coideration)

网友的观点：Vrylwj: 我认为C不太对。(C) The first is a premise that this argument includes; the second is a main idea that can be drawn from this argument.  premise 应是支持argment. the first 没有支持。main idea 的说法也不太好。我最初是想在A和B中选一个的。最后还是选了B. 我认为A不好。因为the second应该也是结论的一部分，而不是special situation weigh against the first.          Cooperqi: 第二句并不是用来反对第一句的，而是提出相反的结论

我觉得这一题的答案是A。consideration在这里是opinion的意思；weigh against sth： be considered important when sth is being judged。

第一部分不是principle，而是个观点。

请大家指教。

我同意你的观点，我也选择A。

我觉得B的错误在於"....principle that is necessary for....", 事实上第一部分并不必要。单独第二部分也能得出结论。第二部分作为anti-consideration我觉得牵强。