[討論]boldface-2

[游客]

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.

[illuna]

這題的two portions是怎麼回事??

我只看到整題都畫線了啊....我還以為這題不能做呢?