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 sev
In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association (NBA)listed at over sev
admin
2011-06-29
50
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 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://kaotiyun.com/show/Uq6O777K
0
考博英语
相关试题推荐
PeterRaycalled-he’scancelledThursday’smeetingbecausehisreportisn’tready.Pleasereturnhiscall.LizWhatshouldPet
ThehistoryofWesternmusicprobablybeginswiththemusicoftheChristianChurch.ButallthroughtheMiddleAgesandevento
Ahundredyearsagoitwasassumedandscientifically"proved"byeconomiststhatthelawsofsocietymakeitnecessarytohave
RecentreformeffortsAhavebeenfocusedonencouraginglifelongorrecurrenteducationtomeetBchangingindividualandsocial
Atthefall2001SocialScienceHistoryAssociationconventioninChicago,theCrimeandJusticenetworksponsoredaforumonth
Threeyearshave______sincewelastmetattheconferenceforInternetcommunicationinBeijing.
Workersinthiscountryaregettinghigherwageswhileturningoutpoorproductsthatdonot______thetestofinternationalco
Hecannot______thefactthathewaslateagainfortheconferenceattheuniversityyesterday.
WhenyoumeetTimWinton,it’seasytounderstandhissuccessatwritingforteenagers.Helikessurfingandfishingandcamping
TheChineseworlddivingchampionwas______fromthenationalteam,whichhasbeenfront-pagereportedinthecountryforsever
随机试题
Therearetimeswhenpeoplearesotiredthattheyfallasleepalmostanywhere.Wecanseethereisalotofsleepingonthebus
M胆碱受体激动时N胆碱受体激动时
A.辛伐他汀B.非诺贝特C.阿托伐他汀D.氯沙坦E.吉非贝齐含氯降血脂药
平均负荷为某段时间内用电设备所消耗电能与该段时间()。
在进行气体监测分析时,被测排放物的浓度应在仪器测试量程的有效范围,即仪器量程的( )。
在当天成型的沥青混合料路面上,()停放任何机械设备或车辆。
《关于大力发展装配式建筑的指导意见》提出,力争用10年左右的时间,使装配式建筑占新建建筑面积的比例达到()。
为避免浪费,风景名胜区内已建设的宾馆、招待所、培训中心、疗养院等建筑物,可继续保留。()
在社区工作中,居民会议主持人应该注意()。
WhatdidthemanthinkaboutthepeopleoftheIceAge?
最新回复
(
0
)