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
外语
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
2012-06-18
18
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, envi-ronmental level, we’ve pretty much gone as far as we can go, " says anthropologist William Cameron Chum-lea 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 "
We learn from the last paragraph that in the near future________
选项
A、the garment industry will reconsider the uniform size.
B、the design of military uniforms will remain unchanged.
C、genetic testing will be employed in selecting sportsmen.
D、the existing data of human height will still be applicable.
答案
D
解析
由最后一段的最后一句话,“…you could use today’s data…”,可知D选项符合题意。
转载请注明原文地址:https://jikaoti.com/ti/mCbYFFFM
0
考博英语
相关试题推荐
Althoughvocalcordsarelackingincetaceans,phonationisundoubtedlycenteredinthelarynx.Thetoothedwhalesorodonto
Alaska’sTongassandChugachNationalForestsareAmerica’sfirstandsecondlargestnationalforests______.
Inthispart,youarerequiredtowriteacompositionentitledOnMistakesinnolessthan200words.Yourcompositionshouldbe
Humanchoice,nottheintrinsiccontentofscience,determinestheoutcome—andscientists,ashumanbeings,thereforehaveaspe
Theseminar,______bytheNobelPrizewinner,probestheproblemofwildlifeextinctioninAfricancountries.
HerofficeintheFirstNationalBankbuildingisprovisional.
ItispossibleforstudentstoobtainadvanceddegreesinEnglishwhileknowinglittleornothingabouttraditionalscholarlyme
Therearsectionofthebraindoesnotcontractwithage,andonecancontinuelivingwithoutintellectualoremotionalfacultie
Letusassume,forthemoment,thatlabormnotpreparedtoworkforalowermoney-wageandthatareductionintheexistinglev
ThecrucialyearsoftheDepression,astheyarebroughtintohistoricalfocus,increasinglyemergeasthedecisivedecadeforA
随机试题
患者,女性,38岁,肘关节对称性疼痛伴压痛,鹰嘴突附近可触及一个直径1cm大小的结节,疑拟类风湿关节炎。对类风湿关节炎最具诊断价值的检查是
患者男,65岁,因“双眼视力渐进性下降6年,右眼胀痛3小时”急诊入院。患者近6年来出现双眼视力逐渐下降,右眼较明显,曾于当地诊所就诊,查出患有白内障。3小时前突然出现右眼胀痛不适,视力急剧下降,且伴有同侧头痛不适、恶心等症状。来医院后检查:Vod:0.01
诊断胸内结节病最常见、最重要的方法是下列哪项
肿瘤的定性检查方法是
下列代理行为中,不属于无权代理行为的是()。
按照《幼儿园工作规程》要求,幼儿园班级规模不宜过大,学前幼儿班不超过()人。
新课程倡导的学习方式有()。
大陆封锁政策
[*]
婴儿在出生后6个月左右即开始生出第一颗牙齿,这时长出的牙齿叫乳牙,一共20个,先后持续到2周岁或2周岁半时全部出齐整套牙齿。出牙是一种生理过程,一般无需小题大做,但有些情况,妈妈应有所了解和注意,以免心中无数,大惊小怪或疏忽大意。婴幼儿出牙的过程中,可能会
最新回复
(
0
)