3. The number of right-handed mothers who hold the baby on the left side exceeds that of left-handed ones by 22%.
A. Right B. Wrong C. Not mentioned
3. B。分析:题干分析:大意:惯用右手的母亲中把孩子靠着身体的左侧怀抱的人数比惯用左手把孩子靠着身体的左侧怀抱的母亲人数多22%。因为句子内容较单一,所以把整个句子看成一层信息,同利用题干中出现的特征词22%作为答案线索,这样发现答案相关句:It emerges that 83 percent of right-handed mothers hold the baby on the left side, but so do 78 percent of left-handed mothers. In other words, only 22 percent of the left-handed mothers have their dominant hands free for actions. (文章中直接出现的数字22%是有关惯用左手的母亲让左手空出来用于做其他的工作,而与问题句的内容无关,而前一句已经点明了两种母亲人数上的差距是5%)因此判断问题句的说法“不正确”。
4. The fact that most left-handed mothers hold the baby on their left side renders the first explanation unsustainable(不受支持的).
A. Right B. Wrong C. Not mentioned
4.A.分析:题干分析:大意:大多数惯用左手的母亲把孩子抱在身体的左侧这个事实表明第一种解释是不正确的。把题干内容划分成2层信息:The fact that most left-handed mothers hold the baby on their left side renders +(The fact)the first explanation unsustainable,同时利用题干中的核心词first explanation作为答案线索,这样发现答案相关句:Clearly there must be some other, less obvious explanation.该句暗示题干中提到的first explanation在前文中,这样发现了直接答案相关句:If asked to explain (与explanation呼应)the significance of this preference most people reply that it is obviously the result of the predominance of right-handedness in the population. By holding the babies in their left arms, the mothers keep their dominant arm free for manipulations. (该句揭示了第一种解释的内容)But a detailed analysis shows that this is not the case. True, there is a slight difference between right-handed and left-handed females; but not enough to provide adequate explanation. It emerges that 83 percent of right-handed mothers hold the baby on the left side, but so do 78 percent of left-handed mothers. (与信息1的内容一致)该句说明大多数用左手的母亲也是左手怀抱孩子,因此判断问题句的说法正确:大多数惯用左手的母亲把孩子抱在身体的左侧这个事实表明第一种解释(为了让占主导作用的手空闲出来做其他的事情)是不正确的。