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
Athletes who cheat by injecting themselves with stored supplies of their own blood might soon be caught out. A revealing trail o
Athletes who cheat by injecting themselves with stored supplies of their own blood might soon be caught out. A revealing trail o
admin
2015-10-20
77
问题
Athletes who cheat by injecting themselves with stored supplies of their own blood might soon be caught out. A revealing trail of debris could give the game away.
Most "blood dopers" cheat by injecting themselves with the blood-boosting hormone erythropoietin(EPO), but there have been tests to detect EPO since 2000. Another way to dope blood is to periodically extract some of your own, store it and re-inject it before competitions. Some professional cyclists are alleged to have done this as part of a doping scandal that emerged in Spain in 2006, called Operacion Puerto. At least one cyclist is still fighting to clear his name.
Re-injecting stored blood boosts the oxygen supply to muscles. The practice has so far eluded detection but now there might be a way catch out the cheats.
During storage, red blood cells start to fall apart, generating debris such as the fragments of cell membranes(a cell membrane is the outside envelop of a living cell). Olaf Schumacher of the University of Freiburg in Germany and his colleagues have shown that when stored blood is re-injected, the recipient’s white blood cells prepare to get rid of this sudden tide of debris. They say that these changes on blood cell ’debris’ could betray sportsmen and make cheats detectable. "It’s like someone dumping rubbish in your blood," he says. "When all the rubbish comes at once, there’s lots of activity."
Schumacher’s team took blood from six non-athletes, stored it for 35 days then re-infused it, taking further blood samples three and four days afterwards. When they analyzed the white blood cells in these samples, genes needed for identifying and disposing of ailing and damaged cells were much more active than usual.
The gene changes led to the appearance of new proteins on the surface of the white blood cells which could potentially be picked up by antibodies, Schumacher says. He also suggests that antibodies could be created to detect the changes to the surface of red blood cells as well. Schumacher couldn’t say whether such tests would be ready in time for the 2012 Olympics in London. David Cowan, director of the UK Drug Control Centre at King’s College London, says: "The paper is promising, but more work is needed to establish a test that meets the rigorous standards required by sport so as not to falsely accuse an athlete." Schumacher says that one key goal is to make sure these changes only occur due to doping, rather than illness, for example.
The sentence "A revealing trail of debris could give the game away"(Lines 2-3, Paragraph 1)shows that
选项
A、the athletes who cheat will lose the game because of a trail of debris.
B、the athletes who cheat have to give up the game because of a trail of debris.
C、a trail of debris will help catch out the athletes who cheat.
D、a trail of debris will help the athletes avoid the game.
答案
C
解析
判断推理题。第一段提到,有的运动员事先将自己的血液储存起来,再将其注射回身体,这样的作假可能很快就会被检测出来。由此可推断,这一种血液“残骸”会使他们的作假行为显露出来,C项最符合这种意思。
转载请注明原文地址:https://kaotiyun.com/show/c3zZ777K
0
考研英语一
相关试题推荐
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Theauthorconsidersthatafairystoryismoreeffectivewhenitis______.Theauthor’smentionofbroomsticksandtelephones
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
Conventionaldisplayadsaresimplywasteful,saysJakobNielsenofGroupM,alargemediabuyer.Sayacompanywantstoreachyo
Thesummer’smosttalkedaboutworkingpaperineconomicsisbyRobertGordon,anditissimplytitled"IsUSEconomicGrowthOv
Ifyouhaveeverboughtsomethingbecauseithadthemostpositivereviews,orjoinedinwithastandingovationsimplybecause
Californiaishavingproblemswithitsdeathpenalty.Ithasn’texecutedanyonesince2006,whenafederalcourtruledthatits
Americanstodaydon’tplaceaveryhighvalueonintellect.Ourheroesareathletes,entertainers,andentrepreneurs,notschola
随机试题
中国魏晋时期的______哲学流派对这个时期的诗歌、书法作品创作中深层的意蕴具有重要影响。()
A.含挥发油,油中主成分为桂皮酸B.含挥发油,油中主成分是α、β-桉油醇C.七叶树素、七叶树苷D.东莨菪碱、莨菪碱E.黄酮类化合物、绿原酸、异绿原酸
A.对工作极端负责,对技术精益求精B.树立正确的经营道德观C.为病患者提供质量保证的药品和安全、有效、经济、合理的药学服务D.互相关心,维护集体荣誉E.开展用药调查及药品利用评价药品流通领域的道德责任之一是()
案情:2009年1月,甲、乙、丙、丁、戊共同投资设立鑫荣新材料有限公司(以下简称鑫荣公司),从事保温隔热高新建材的研发与生产。该公司注册资本2000万元,各股东认缴的出资比例分别为44%、32%、13%、6%、5%。其中,丙将其对大都房地产开发有限公司所持
美国对失职或在执业中出现问题的房地产经纪人采取的主要措施有()。
当量子能量达到()eV以上时,对物体有电离作用,能导致机体的严重损伤,这类辐射称为电离辐射。
下列选项中,不属于全国人大常委会的预算管理职权的是()。
2019年2月,农业农村部等七部门联合印发《国家质量兴农战略规划(2018—2022年)》。下列关于实施质量兴农战略的说法,正确的是:
“杵臼之交”多用来指不计身份而结交的朋友。这里的“杵臼”在古代是用来做什么的?()
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheideathattheWestdominatestheworldeconomy.Infact
最新回复
(
0
)