The explanation, offered by "6 floor", why the answer should be D is accurate.Perhaps, another less important question is that "the new influenza vaccine is effective for childeren" is a given premise or a fact, and we cannot get any reasonable conclusion by denying a fact in an argument when we try to solve a GMAT logic question. So, Choice E is not correct
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发表于 2007-2-22 05:13:00
