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 1960, Ethiopian marathoner Abebe Bikila earned an Olympic gold medal without wearing any shoes. But bare feet on the Olympic
In 1960, Ethiopian marathoner Abebe Bikila earned an Olympic gold medal without wearing any shoes. But bare feet on the Olympic
admin
2015-03-25
57
问题
In 1960, Ethiopian marathoner Abebe Bikila earned an Olympic gold medal without wearing any shoes. But bare feet on the Olympic track these days are passe, as athletes slip into ever more high-tech gear. Shoes, swimsuits, and clothing are getting lighter and stronger, adhering like glue to athletes’ bodies and moving more fluidly through air and water.
In Beijing, U. S. track and field athletes will be wearing Nike shoes and clothing that incorporate threads made of Vectran, a superstrong liquid crystal polymer that withstands high temperatures. The result, according to Nike, is lighter, stiffer shoes to reduce friction and clothes that reduce drag by 7% compared with the Nike outfits worn at the 2004 games in Athens.
Sprinters will also benefit from even tighter compression garments. In theory, these improve performance because of proprioception, that unconscious ability that enables you to pinpoint your nose when your eyes are closed. Physiologist Russ Tucker of the University of Cape Town, South Africa, says that because runners need to contract muscles precisely—at the proper angle, velocity, and time—tight-fitting garments help the brain identify where in space the limb is poised so they know when to activate the muscle.
In the water, the Speedo LZR Racer suit, which debuted in March 2008, is all the buzz. Swimmers donning the suit have broken 46 world records so far. The suit includes polyurethane panels placed strategically around parts of the torso, abdomen, and lower back that experience high amounts of drag in the pool. It also incorporates a corset-like structure that keeps the body in a streamlined position. Raul Arellano, a biomechanist at the University of Granada, Spain, says the LZR Racer suit could benefit older athletes like 41-year-old Dara Torres of the United States, especially in areas where fat tends to accumulate.
Some of the technologies needed to develop the suit " didn’t really exist 10 years ago," says Jason Rance, head of Aqualab in Nottingham, U. K. , the division of Speedo that designed the suit. Those include ultrasonic welding that eliminated the need for seams, and technology that allowed parts of the suit to be finely sanded and a waterrepellent substance added to prevent water from leaking in.
But the suit has raised eyebrows. "Who’s going to win the gold medal, the swimmer or the technician?" asks Huub Toussaint, a biomechanist at the Free University in Amsterdam, who worries that the suit gives swimmers an unfair edge, although the international body governing the sport approved it.
For all the hype surrounding space-age shoes and clothing, there’s a flip side: Any boost to performance could just be psychological. South Africa’s Tucker, who races for fun, says the compression garments make him feel powerful and secure. Such a superhero aura might give any competitor a mental edge. " It doesn’t really matter if the advantages are physically real or not," he says, "as long as the athlete gets some benefit. "
Swimmers can benefit from Speedo LZR Racer suit because
选项
A、this kind of suit can increase the drag in the poll.
B、it can offer the minimum resistance to the flow of water.
C、it can make the swimmers feel more younger.
D、it is the product of a world famous company.
答案
B
解析
推理判断题。根据题干关键词Speedo LZR Racer提示定位至第四段。该段说明了这种衣服的优越性能。首先,根据high amounts of drag in the pool可以推出设计时考虑到了要减少阻力,故排除[A];原文只是提及该服装能使年纪较大的运动员比赛成绩受益,并未提及使其感到更年轻,故排除[C];[D]不合逻辑,大公司的产品也不是能有利于运动员的理由,故排除。
转载请注明原文地址:https://kaotiyun.com/show/I174777K
0
考研英语一
相关试题推荐
Youaregoingtoreadalistofheadingsandatextaboutnaturalselection.Choosethemostsuitableheadingfromthelistfor
Youaregoingtoreadalistofheadingsandatextaboutnaturalselection.Choosethemostsuitableheadingfromthelistfor
ThepopulationoftheUnitedStatesisonly6%theworld’spopulation,butAmericans(1)_____onethirdofalltheenergy(2)___
Untilrecently,mostpopulationgrowthhasoccurredinrelativelydenseurbanenvironments.In【C1】______words,evenifwewerew
Untilrecently,mostpopulationgrowthhasoccurredinrelativelydenseurbanenvironments.In【C1】______words,evenifwewerew
Thestandardizededucationalorpsychologicaltests,thatarewidelyusedtoaidinselecting,assigning,orpromotingstudents,
EmployeesaredemandingmorefromtheiremployersbecauseTheword"gewgaws"(Paragraph6)mostprobablymeans
Withawalkingstickinhishand,anoldman,wearingalonggrayheard,baldasastone,dull-lookingindesperateneedofhelp
Forhealthinsurance,theUnitedStateshastakentheroadlesstraveled.TheUnitedStatesistheonlyrichcountrywithoutuni
随机试题
所有齿轮的轴线相对机架都是固定的轮系称为定轴轮系。()
A.缺血期B.缺氧期C.充血期D.手足发绀症E.系统性硬化病
血管紧张素转换酶抑制药的不良反应不包括
高度高、体量大、功能复杂、扑救困难的建筑应设()消防车道。
下列不属于公估从业人员守法遵规这一道德原则具体表现的是( )。
美国研究人员通过实验发现,那些有上网经验者脑部活跃区域范围广得多,而经过一段时间后,刚刚接触互联网的老人赶上了那些“老手”。他们认为,网络搜索刺激脑细胞以及脑细胞之间的相互连接,使脑细胞更加活跃。老年人适当使用互联网后大脑活跃区域增加,网上冲浪或是延缓大脑
时间感知扭曲是指对时间不正确的知觉。在生活中,受各种因素影响,人们对时间的感知往往会不符合实际,有时候觉得时间过长,有时候觉得时间太短。许多原因都可以造成时间感知扭曲,现实中一场糟糕的表演会让人如坐针毡、觉得终场遥遥无期,与此相反的是,人们对于美好愉悦的
在编委们看来,虽然互联网上信息量很大,但_______,《文化知识》杂志始终坚持“准确、生动、有用”的原则,所以即使在目前网络十分发达的状况下仍有其生命力,但也需努力“守正出新”。填入画横线部分最恰当的一项是:
某班学生人数为30到60之间的一个奇数,每位学生至少预订一种书,已知预订科幻书的与预订两种书的人数之比为3:2,预订文学书的与预订两种书的人数之比为6:5。问:只预订科幻书的学生比只预定文学书的多几人?
Howhighisthepricewewouldpayforjustice?
最新回复
(
0
)