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 seve
In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association(NBA)listed at over seve
admin
2017-12-11
53
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/BoBZ777K
0
考研英语一
相关试题推荐
ScientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteriaTheChineseresea
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
TheEU’sclimatechiefisseekingtoextendthebloc’srenewableenergytargets,inamoveapparentlydesignedtoprotectthegr
Oldpeoplearealwayssayingthattheyoungarenotwhattheywere.Thesame【C1】______ismadefromgenerationtogenerationand
We’vebeenhearingaboutitforyears,butthebooklesslibraryhasfinallyarrived,firstappearingoncollegecampuses.AtDre
Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurveyth
Universitiesareinaseeminglyself-contradictoryposition.AsStefanCollinipointsoutinhisbook,theseancient【C1】______ha
Universitiesareinaseeminglyself-contradictoryposition.AsStefanCollinipointsoutinhisbook,theseancient【C1】______ha
ThequestforwisdomisasoldasSocrates,butit’salsoanup-to-the-minuteeconomicindicator.Acontrarianone:whenthings
随机试题
下列有关数量金字塔的叙述,正确的是()
功能清热解毒、排脓,善治肺痈、肺热咳嗽的药物是()
患者男,70岁。因突发心前区压榨性疼痛2小时就诊,体检时患者突然意识不清,口唇发绀,抽搐。患者的心电监护显示如图13,则下一步的首要治疗是
背景资料:某公司中标某工程,签订了固定单价合同。按公司成本管理规定进行成本预测:其中人工费187.6万元,材料费302.1万元,机械使用费79.3万元,施工措施费65.4万元,施工管理费30.2万元,税金10.4万元,然后将成本预测结果下达给项目经理部进
资产管理业务中,出现证券公司与客户签订资产管理合同不规范、约定不明,操作人员违反合同约定买卖证券或划转资金,操作人员在经营中进行不必要的证券买卖损害委托人的利益等,而形成( )。
天津成为北方最大的商港是在()。
陈太丘与友期——《世说新语》陈太丘与友期行,期日中,过中不至,太丘舍去,去后乃至。元方时年七岁,门外戏。客问元方:“尊君在不?”答曰:“待君久不至,已去。”友人便怒:“非人哉!与人期行,相委而去。”元方曰:“君与家君期日中。日中不至,则是无信;对子骂父
制发公文的目的和要求一般取决于()
如果在通信信道上发送1字节所需时间为0.004ms,则该信道的数据传输速率是()。
在考生文件夹下打开文档Excel.xlsx。【背景素材】财务部助理小王需要向主管汇报2013年度公司差旅报销情况,现在请按照如下需求,在Excel.xlsx文档中完成工作:如果“日期”列中的日期为星期六或星期日,则在“是否加班”列的单元格中
最新回复
(
0
)