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  3. Men cannot manufacture blood as efficiently as women can. This makes surgery riskier for men. Men also need more oxygen because

Men cannot manufacture blood as efficiently as women can. This makes surgery riskier for men. Men also need more oxygen because

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问题     Men cannot manufacture blood as efficiently as women can.  This makes surgery riskier for men. Men also need more oxygen because they do not breathe as often as women. But men breathe more deeply and this exposes them to another risk. When the air is polluted, they draw more of it into their lungs.
    A more recent and chilling finding is the effect of automobile and truck exhaust fumes on children’s intelligence. These exhaust fumes are the greatest source of lead pollution in cities.  Re searchers have found that the children with the highest concentration of lead in their bodies have the lowest scores on intelligence tests and that boys score lower than girls. It is possible that these low scores are connected to the deeper breathing that is typical of the male.
    Men’s bones are larger than women’s and they are arranged somewhat differently. The feminine walk that evokes so many whistles is a matter of bone structure. Men have broader shoulders and a narrower pelvis, which enables them to stride out with no waste motion.  A woman’s wider pelvis, designed for childbearing, forces her to put more movement into each step she takes with the result that she displays a bit of a jiggle and sway as she walks.
    If you think a man is brave because he climbs a ladder to clean out the roof gutters, don’t forget that it is easier for him than for a woman. The angle at which a woman’s thigh is joined to her knees makes climbing awkward for her, no matter whether it is a ladder or stairs or a mountain that she is tackling.
    A man’s skin is thicker than a woman’s and not nearly as soft. The thickness prevents the sun’s radiation from getting through, which is why men wrinkle less than women do.
    Women also stay cooler in summer. The fat layer helps insulate them against heat. Men’s fat is distributed differently. And they do not have that layer of it underneath their skin. In fact, they have considerably less fat than women and more lean mass. Forty-one percent of a man’s body is muscle compared to thirty-five percent for women, which means men have more muscle power. When it comes to strength, almost 90 percent of a man’s weight is strength compared to about 50 percent of woman’s weight.
    The higher proportion of muscle to fat makes it easier for men to lose weight. Muscle burns up five more calories a pound that fat does just to maintain itself. So when a man goes on a diet, the pounds roll off much faster.
    For all men’s muscularity they do not have the energy reserves women do. They have more start-up energy, but the fat tucked away in women’s nooks and crannies provides a rich energy reserve that men lack.
    Cardiologists at the University of Alabama who tested healthy women in treadmills discovered that over years the female capacity for exercise far exceeds the male capacity. A woman of sixty who is in good health can exercise up to 90 percent of what she could do when she was twenty. A man of sixty has 60 percent left of his capacity as a twenty-year-old.
We can infer all of the following EXCEPT that ______.
选项 A、the difference in bone structure reflects differences in their social roles
B、men appear to be braver than women partly because of biological reasons
C、men have a larger appetite than women do
D、men fall ill more often than women because of their deep breathing
答案C
解析 本题可用排除法。第三、四段作者讲述了男女骨骼构造不同，导致男性可以进行爬高作业，而女性则不方便做此类工作，因此骨骼不同能够部分反映出社会分工的不同，选项A正确；选项B第四段也已有明确表述；第一段，作者提到男性需要深呼吸，而这又给了受污染空气进入肺部的机会，因此，男性可能会更容易患病，D项也正确；选项C在文中并未提及。
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本试题收录于： A类竞赛（研究生）题库大学生英语竞赛（NECCS）分类
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大学生英语竞赛（NECCS）

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