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
Artificial hearts have long been the stuff of science fiction. In "Robocop", snazzy cardiac devices are made by Yamaha and Jense
Artificial hearts have long been the stuff of science fiction. In "Robocop", snazzy cardiac devices are made by Yamaha and Jense
admin
2016-12-28
55
问题
Artificial hearts have long been the stuff of science fiction. In "Robocop", snazzy cardiac devices are made by Yamaha and Jensen, and in "Star Trek", Jean-Luc Picard, captain of the Enterprise, has one implanted in the year 2328. In the present day, however, their history has been more chequered. The first serious attempt to build one happened in the 1980s, when Jarvik-7, made by Robert Jarvik, a surgeon at the University of Utah, captured the world’s attention. But Jarvik-7 was a complicated affair that needed to be connected via tubes to machines outside the body. The patient could not go home, nor even turn around in bed. Various other designs have been tried since, but all were seen as temporary expedients intended to tide a patient over until the real thing became available from a human donor.
That may be about to change. This week, America’s Food and Drug Administration gave its approval to a new type of artificial heart made by Abiomed, a firm based near Boston. The agency granted a "humanitarian device exemption" , a restricted form of approval that will allow doctors to implant the new device in people whose hearts are about to fail but who cannot, for reasons such as intolerance of the immunosuppressive drugs needed to stop rejection, receive a transplant. Such people have a life expectancy of less than a month, but a dozen similarly hopeless patients implanted with Abiomed’s heart survived for about five months.
Unlike Dr. Jarvik’s device, this newfangled bundle of titanium and polyurethane aims to set the patient free. An electric motor revolving up to 10,000 times a minute pushes an incompressible fluid around the Abiomed heart, and that fluid, in turn, pushes the blood—first to the lungs to be oxygenated, and then around the body. Power is supplied by an electric current generated in a pack outside the body. This induces current in the motor inside the heart. All diagnostics are done remotely, using radio signals. There are no tubes or wires coming out of the patient.
The charger is usually plugged into the mains, but if armed with a battery it can be carried around for hours in a vest or backpack, thus allowing the patient to roam freely. Most strikingly, the device’s internal battery can last half an hour before it needs recharging. That allows someone time to take a shower or even go for a quick swim without having to wear the charger.
Abiomed’s Chairman, Michael Minogue, does not claim that his firm’s product will displace human transplants. Even SO, the firm has big ambitions. It is already developing a new version that will be 30% smaller (meaning more women can use it) and will last for five years. That should be ready by 2008—320 years earlier than the writers of "Star Trek" predicted.
It can be inferred from the second paragraph that________.
选项
A、the regulatory approval is limited with respect to the scope of application
B、the life expectancy will not be improved compared with that indicated by the current record
C、America’s Food and Drug Administration gave its approval to a new type of artificial heart
D、Doctors will implants the new device in patients whose hearts are about to fail
答案
A
解析
这是一道细节分析题,测试考生对原文中细微信息的准确识别与理解。本题的答案信息来源在第二段的第二、三句,尤其是第三句中的“a restricted form of approval”(一种局限性的准许形式),暗示“相关准许是在一定范围之内的准许,是一种受到某种限制的准许,并非绝对的准许”。由此可以推断本题的答案应该是选项A。考生在阅读时对原文中的修饰限定性词语要认真对待和理解。
转载请注明原文地址:https://kaotiyun.com/show/9koZ777K
0
考研英语一
相关试题推荐
Theyareregardedaschoresbybothsexes,butfalldisproportionatelyononlyone.ThelatestsurveyoftimeuseinAmericasug
Whenaskedspecificallyaboutthecreativeprocess,Dr.Schutzexplainedthatfearismostresponsibleforblockingthecreativi
Whenaskedspecificallyaboutthecreativeprocess,Dr.Schutzexplainedthatfearismostresponsibleforblockingthecreativi
Inrecentdecades,scientistshavebecomeincreasinglyawareoftheparttheobserver【C1】______inthescientificprocess.Inthe
TheEconomistcalculatesthataroundtheworldalmost290million15-to24-year-oldsareneitherworkingnorstudying:almosta
TheEconomistcalculatesthataroundtheworldalmost290million15-to24-year-oldsareneitherworkingnorstudying:almosta
TheEconomistcalculatesthataroundtheworldalmost290million15-to24-year-oldsareneitherworkingnorstudying:almosta
TheEconomistcalculatesthataroundtheworldalmost290million15-to24-year-oldsareneitherworkingnorstudying:almosta
ThestatusofEnglishasaninternationallanguageappearsunassailable.Itissimultaneouslypreeminentinscience,politics,b
The20thcenturywitnessedtwoprofoundchangesinregionsoftheworldwherepeoplearewelleducatedandscienceandtechnolog
随机试题
引起心肌炎的病毒种类较多,其中以哪种病毒最多见?()
“学在官府”主要反映了哪个时期的教育状况?其主要内容和特点是什么?
西方学者对市场营销道德的研究始于()
根据结构的重要性,将结构安全等级划分为:
1.背景材料:京沈高速公路北京到沈阳的高速路是国家的重点建设项目,其中宝坻一山海关,全长199km,为双向6车道高速公路。沥青混凝土表面为SBS改性沥青混凝土。结构为:20cm厚石灰稳定土层基层,18cm厚石灰粉煤灰稳定碎石基层,19c
下列各项中,可以增加流动资产周转天数的有()。
下列关于出版物社会效益与经济效益的关系,说法正确的是()。
操作性定义,又称操作定义,是根据可观察、可测量、可操作的特征来界定变量含义的方法。即从具体的行为、特征、指标上对变量的操作进行描述,将抽象的概念转换成可观测、可检验的项目。根据上述定义,下列属于操作性定义的是:
设A=,B=(E+A)-1(E-A),则(E+B)-1=______
Whichcodematchestheshapeorpattern?
最新回复
(
0
)