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
医学
Get ready for a new kind of machine at your local gym: one that doesn’t involve huffing and puffing as you burn off calories. In
Get ready for a new kind of machine at your local gym: one that doesn’t involve huffing and puffing as you burn off calories. In
admin
2013-11-14
39
问题
Get ready for a new kind of machine at your local gym: one that doesn’t involve huffing and puffing as you burn off calories. Instead, all you have to do is stand still for 30 seconds while the machine measures your body fat. It could then tell you exactly where you could do with losing a few pounds and even advise you on exercises for your problem areas. If the body fat scanner turns out to be accurate enough, its makers hope it could one day help doctors spot disease.
The scanner works by simultaneously building up an accurate 3D image of the body, while measuring the body’s effect on an electromagnetic field. Combining the two measurements allows the researchers to work out the distribution of fat and water within. Neither method is new on its own, says Henri Tapp, at the Institute of Food Research in Norwich in the UK. "The smart thing is that we’ve put them in one machine."
And it’s not just for gym users. The body fat scanner could be used to study fat deposition as children develop, while patients recover from injury, or during pregnancy. And since it uses radio waves rather than X-rays, Tapp’s device is safe to use repeatedly.
Body shape is known to be a risk indicator for heart disease and diabetes. So accurately quantifying fat distribution could help doctors suggest preventive measures to patients before problems arise. At the moment, doctors estimate fat content from knowing body volume and water content. To a good approximation, says Tapp, anything that isn’t fat is water. The amount of water in the body is often measured by giving the subject a drink of water that contains a radioactive tracer. The level of tracer in the patient’s urine after three hours reveals the total water volume.
To find out a body’s volume, subjects are weighed while totally submerged in water, and this is subtracted from their normal weight to give the weight of water displaced, and hence the subject’s volume. But it is scarcely practical for seriously ill people.
There are other ways to directly measure body fat, such as passing a minuscule current between the wrists and feet. The overall fat content can then be estimated from the body’s resistance. But this method doesn’t take body shape into account—so a subject with particularly skinny legs might register a higher fat content than the true value. That’s because skinny legs — with a lower cross-sectional area — will present higher resistance to current. So the machine thinks the water content of the body is lower—rating the subject as fatter. Also, the system can only give an overall measurement of fat.
Tapp’s method uses similar calculations, but is more sophisticated because it tells you where you are piling on the pounds.
The new machine is designed______.
选项
A、to picture the body’s hidden fat
B、to identify those at risk for obesity
C、to help clinically treat specific cases
D、to measure accurately risky obesity-related effects
答案
A
解析
细节题。参见第一段第二句,你只需要在机器上站30秒,它就会测量你身体中的脂肪。故选A。
转载请注明原文地址:https://jikaoti.com/ti/3INDFFFM
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
A、Thesurgerywasabsolutelynecessaryforthepatient.B、Thesurgerycouldnothavebeenmoresuccessful.C、Thenecessityfort
Tobeginwith,itisimpossibletocomeupwithasatisfactorydefinitionofwhatconstituteshappyandunhappymarriage.
A、Hewaskilledatthebuildingsite.B、Hewasinjuredinatrafficaccident.C、Hewasseriouslyeyesight-damaged.D、Hewasseri
Everyonehasseenithappen.Acolleaguewhohasbeenexcited,involved,andproductiveslowlybeginstopullback,loseenergy
Dry-cleaningmachinesthatuseliquidcarbondioxideasasolventwillgoonsaleintheUSnextyear—thankstochemistsinNort
AdolfHitlersurvivedanassassinationattemptin1944withthelampofpenicillinmadebytheAllies,amicrobiologistintheU
Hitlerwasthetargetofthehoax.Heknewthat2millionAlliedtroopsweremassinginEnglandtoassaulttheNazis.
Thegreatquestionthatthispaperwill,butfeebly,attempttoansweris,whatisthecreativeprocess?Thoughmuchtheory
Thegreatquestionthatthispaperwill,butfeebly,attempttoansweris,whatisthecreativeprocess?Thoughmuchtheory
随机试题
局限前壁心肌梗死心电图特征改变见于
蟾酥内服的用量是
建设工程监理目标是项目监理机构建立的前提,应根据()确定的监理目标建立监理机构。
子女教育费用一般是( )的理财需求。
丁某原系A市B区国家税务局副局长。B区国家税务局在征税过程中,发现管区内个人独资私营企业“腾飞”鞋厂长期偷税漏税,其法定代表人刘某对税务执法人员态度蛮横,既不配合调查,也不承认错误。经查,该企业累计偷税达50余万元人民币。税务执法人员认为刘某已构成刑事犯罪
在中国人民政治协商会议第一届全体会议会后,我国当时设置的国家元首是( )。
An×n=(α1,α2,…,αn),Bn×n=(α1+α2,α2+α3,…,αn+α1),当r(A)=n时,方程组BX=0是否有非零解?
通信子网规划设计中有几个因素要考虑,(41)不是要考虑的因素。目前广域网主要以(42)为主。
在关系数据库中实体和实体之间的联系都用()来表示,实现了数据表示的单一性。
有以下程序#includeintfuna(inta,intB){returna+b;}intfunb(inta,intB){returna-b;}intsss(int(*t)(),intx,inty){return((*t)(x,y));}mai
最新回复
(
0
)