首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association (NBA) listed at over se
In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association (NBA) listed at over se
admin
2017-01-17
29
问题
In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association (NBA) listed at over seven feet. If he had played last season, however, he would have been one of 42. The bodies playing major professional sports have changed dramatically over the years, and managers have been more than willing to adjust team uniforms to fit the growing numbers of bigger, longer frames.
The trend in sports, though, may be obscuring an unrecognized reality: Americans have generally stopped growing. Though typically about two inches taller now than 140 years ago, today’s people—especially those born to families who have lived in the U.S. for many generations—apparently reached their limit in the early 1960s. And they aren’t likely to get any taller. "In the general population today, at this genetic, environmental level, we’ve pretty much gone as far as we can go," says anthropologist William Cameron Chumlea of Wright State University. In the case of NBA players, their increase in height appears to result from the increasingly common practice of recruiting players from all over the world.
Growth, which rarely continues beyond the age of 20, demands calories and nutrients—notably, protein—to feed expanding tissues. At the start of the 20th century, under-nutrition and childhood infections got in the way. But as diet and health improved, children and adolescents have, on average, increased in height by about an inch and a half every 20 years, a pattern known as the secular trend in height. Yet according to the Centers for Disease Control and Prevention, average height—5 ’9" for men, 5’4" for women—hasn ’t really changed since 1960.
Genetically speaking, there are advantages to avoiding substantial height. During childbirth, larger babies have more difficulty passing through the birth canal. Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs. "There are some real constraints that are set by the genetic architecture of the individual organism," says anthropologist William Leonard of Northwestern University.
Genetic maximums can change, but don’t expect this to happen soon. Claire C. Gordon, senior anthropologist at the Army Research Center in Natick, Mass, ensures that 90 percent of the uniforms and workstations fit recruits without alteration. She says that, unlike those for basketball, the length of military uniforms has not changed for some time. And if you need to predict human height in the near future to design a piece of equipment, Gordon says that by and large, "you could use today’s data and feel fairly confident."
On which of the following statements would the author most probably agree?
选项
A、Non-Americans add to the average height of the nation.
B、Human height is conditioned by the upright posture.
C、Americans are the tallest on average in the world.
D、Larger babies tend to become taller in adulthood.
答案
B
解析
细节题。根据出题顺序定位到第四段。段中提到real constraints that are set by the genetic architecture(对身高的限制是由遗传结构决定的),可见直立行走的姿势是限制身高的遗传因素之一,选B项。其他三项均是对原文的曲解。
转载请注明原文地址:https://kaotiyun.com/show/jQEZ777K
0
考研英语一
相关试题推荐
Ifyouhavehighbloodpressure,you’reingood【C1】______.Hypertensionaffects67millionAmericans,includingnearlytwo-third
Ifyouhavehighbloodpressure,you’reingood【C1】______.Hypertensionaffects67millionAmericans,includingnearlytwo-third
Ifyouhavehighbloodpressure,you’reingood【C1】______.Hypertensionaffects67millionAmericans,includingnearlytwo-third
Childrenneedexercise.Parentsoftenworrythat【C1】______timeforathleticsorevenforjustplayingontheJungleJimis
Childrenneedexercise.Parentsoftenworrythat【C1】______timeforathleticsorevenforjustplayingontheJungleJimis
TheEU’sclimatechiefisseekingtoextendthebloc’srenewableenergytargets,inamoveapparentlydesignedtoprotectthegr
TheEU’sclimatechiefisseekingtoextendthebloc’srenewableenergytargets,inamoveapparentlydesignedtoprotectthegr
TheEU’sclimatechiefisseekingtoextendthebloc’srenewableenergytargets,inamoveapparentlydesignedtoprotectthegr
Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurveyth
Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurveyth
随机试题
国务院总理在选举时人选由________提名。()
在下列组织结构中,最有可能产生集权领导的组织形式是()
下列享有对该部长篇小说的著作权的人包括()。音像出版社发行包含影片片头曲的磁带是否侵犯他人著作权?为什么?()
下列不属于动态控制中的三大要素的是()。
根据《合同法》的规定,下列各项中,债权人不可以行使撤销权的情形有()。
依据税法规定,对出口商品退还增值税、消费税的,均不退还已缴纳的城市维护建设税。()
教师公正的核心是()。
随着信息技术的发展,旅游网站成为传播旅游信息资源的重要渠道,是大部分潜在游客出行前搜寻信息的主要参考来源。据统计,有61.2%的旅游者出行时会选择从网上搜寻信息,而且网络旅游信息具有搜寻成本低、传播快的特点,成为重要的信息载体和影响旅游者决策的因素。这段文
空中花园
______hetriedtopassthedrivingtest,hestillfailedthesecondtime.
最新回复
(
0
)