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
Just seven years ago, the Jarvik-7 artificial heart was being cheered as the model of human creativeness. The sight of Barney Cl
Just seven years ago, the Jarvik-7 artificial heart was being cheered as the model of human creativeness. The sight of Barney Cl
admin
2012-12-26
73
问题
Just seven years ago, the Jarvik-7 artificial heart was being cheered as the model of human creativeness. The sight of Barney Clark—alive and conscious after trading his diseased heart for a metal-and-plastic pump— convinced the press, the public and many doctors that the future had arrived. It hadn’t. After monitoring production of the Jarvik-7, and reviewing its effects on the 150 or so patients (most of whom got the device as a temporary measure) the U.S. Food and Drug Administration concluded that the machine was doing more to endanger lives than to save them. Last week the agency cancelled its earlier approval, effectively banning (禁止) the device.
The recall may hurt Symbion Inc., maker of the Jarvik-7, but it won’t end the request for an artificial heart. One problem with the banned model is that the tubes connecting it to an external power source created a passage for infection. Inventors are now working on new devices that would be fully placed, along with a tiny power pack, in the patient’s chest. The first sample products aren’t expected for another 10 of 20 years. But some people are already worrying that they’ll work—and that America’s overextended health-care programs will lose a precious $2.5 billion to $5 billion a year providing them for a relatively few dying patients. If such expenditures (开支) cut into funding for more basic care, the net effect could actually be a decline in the nation’s health.
The new models of artificial hearts are expected______.
选项
A、to have a working life of 10 or 20 years
B、to be set fully in the patient’s chest
C、to be equipped with an external power source
D、to create a new passage for infection
答案
B
解析
文章中第2段第3句提到,这种新仪器可以完全置于患者的胸腔内,B与之相符,故选B。A在文中并未提及;C、D说的对象是Jarvik-7,故也排除。
转载请注明原文地址:https://kaotiyun.com/show/14w7777K
0
大学英语四级
相关试题推荐
A、Thespeakerthinksthatwelivetoeat,butnoteattolive.B、Thespeakerdoesn’tthinkthatweshouldeatwhenliving.C、The
Forthispart,youareallowed30minutestowriteashortessayentitledCredit.Youshouldwriteatleast120wordsfollowing
Whenyouhavetomeetsomeonefromadifferentculture,beprepared.Ifyouunderstandculturaldifferences,you’llbeabetter
Gettingagoodnight’ssleephaslongbeenknowntoconsolidatetheday’smemories,movingthemfromshort-termstorageintolon
Gettingagoodnight’ssleephaslongbeenknowntoconsolidatetheday’smemories,movingthemfromshort-termstorageintolon
Gettingagoodnight’ssleephaslongbeenknowntoconsolidatetheday’smemories,movingthemfromshort-termstorageintolon
PerhapslikemostAmericansyouhavesomeextrapoundstoshed.Youmayevenhavetriedafad(时尚)dietortwo,butfoundyourse
Atabriefingheldyesterdaytooutlineplansforanundergroundrepository(贮藏处)forhigh-activitynuclearwasteintheUnited
PeopleintheUScannowcarryanartificialintelligence(AI)aroundintheirpocket,whereitwaitspatientlytobetoldwhat
随机试题
“渴而多饮为上消;消符善饥为中消;口渴,小水如膏者为下消”,此论见于()(1992年第70题)
正常成人的尿比重为
从E—R模型向关系模型转换,一个m:n的联系转换成一个关系模式时,该关系模式的主键为_______。
关于正常妊娠期妇女血液成分变化的叙述,正确是()。
直角刚杆OAB在图示瞬时有ω=2rad/s,α=5rad/s2,若OA=40cm,AB=30cm,则B点的速度大小为()cm/s。
当代法国生态纪录片并不仅仅是单纯__动物生活,而是探索更深层的真实,把被肉眼隐藏的内涵加以揭示,复活人们的现实生活中__了的感觉,让观众发现在日常认识中被忽略的动物的力量和美感,并从动物身上寻找到全新的意义,透过它们,人类也多了一扇审视自己的窗口。在这些华
检察机关依法对公安机关执行刑事判决、裁定的活动实施监督,监督的主要内容是()。
根据以下资料,回答下列问题。2016年,我国全年完成邮电业务收入总量43344亿元,比上年增长52.7%。其中,邮政业务收入7397亿元,增长45.7%;电信业务总量35948亿元,增长54.2%。邮政业全年完成邮政函件业务36.2亿件,包裹业务
在下列微分方程中,以y=C1ex+C2cos2x+C3sin2x(C1,C2,C3为任意常数)为通解的是()
将考生文件夹下KEEN文件夹设置成隐藏属性。
最新回复
(
0
)