Many pregnant women suffer from vitamin deficiency, but this is frequently not due to vitamin deficiency in their diets; most often it is because they have higher requirements for vitamins than do the rest of the population. 很多怀孕的妇女患有缺乏维生素的症状,但这常常不是因为他们的饮食中缺乏维生素,更经常是由于她们比其他人需要更多的维生素。 The best criticism of the reasoning in the statement above is that it 对上面的陈述推理最好的批驳是
a fails to specify the percentage of pregnant women who suffer from vitamin deficiency. 它未能具体给出患维生素缺乏症的孕妇的比例 b gives insufficient information about why pregnant women have higher vitamin requirements than do other groups. 它对为什么孕妇比其他人需要更多的维生素未能给出足够的信息 c fails to employ the same reference group for both uses of the term "Vitamin deficiency" 它在两次用到“缺乏维生素”一词时使用的参照群体是不同的 d provides insufficient information about the incidence of vitamin deficiency in other groups with high vitamin requirements. 它对其他维生素需求量大的人的缺乏维生素现象未能给出足够的信息 e uses "higher requirements in an ambiguous manner 它以模糊的方式使用“需求量大”一词