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
Transplant surgeons work miracles. They take organs from one body and integrate them into another, granting the lucky recipient
Transplant surgeons work miracles. They take organs from one body and integrate them into another, granting the lucky recipient
admin
2010-05-26
56
问题
Transplant surgeons work miracles. They take organs from one body and integrate them into another, granting the lucky recipient a longer, better life. Sadly, every year thousands of other people are less fortunate, dying while they wait for suitable organs to be found. The terrible constraint on organ transplantation is that every life extended depends on the death of someone young enough and healthy enough to have organs worth transplanting. Such donors are few. The waiting lists are long, and getting longer.
Freedom from this constraint is the dream of every transplant surgeon. So far attempts to make artificial organs have been disappointing: Nature is hard to mimic. Hence the renewed interest in trying to use organs from animals.
Doctors in India have just announced that they have successfully transplanted a heart from a pig into a person. Pressure to increase the number of such "xenotransplants" (异种移植) seem to be growing. In Europe and America, herds of pigs are being specially bred and genetically engineered for organ donation. During 1996 at least two big reports on the subject—one in Europe and one in America were published. They agreed that xenotransplantation was permissible on ethical grounds, and cautiously recommended they be allowed.
The ethics of xenotransplantation are relatively unworrying. People already kill pigs both for food and for sport; killing them to save a human life seems, if anything, easier to justify. However, the science of xenotransplantation is much less straightforward.
Import an organ from one animal to another and you may bring with it any number of infectious diseases. That much is well known. However, coping with this danger is not merely a matter of screening for obvious ills such as parasites. Many diseases that could harm humans may be both undetectable and harmless in their natural hosts. Diseases that have been dormant for years may suddenly become active if they find themselves in a new environment, such as a human recipient’s body. After that, they may start to infect other people.
The word "dormant" (Line 4, Para. 5) means______.
选项
A、hidden
B、inactive
C、potential
D、devil
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/XMV7777K
0
大学英语四级
相关试题推荐
FantasyFlight:ChiakiMukai,Japan’sFirstFemaleAstronautRaisedbyaworkingmotherinGunmaPrefecture,aplaceknownf
A、Heloveshispresentjob.B、Heisgoingtoquithisjob.C、Heisgoingtoopenastore.D、Heworksinarepairshop.B
With950millionpeople,IndiarankssecondtoChinaamongthemostpopulouscountries.ButsinceChina【C1】______afamilyplan
A、Shopsthatselljewelry,clothingandfoodforpets.B、Shopsthatprovidemedicaltreatmentforpets.C、Shopsthatselleatsa
A、Childrenacquiredtheinformationtheyneededbydirectexperience.B、Childrentaughtoneanotherinsmallsupervisedgroups.
Althoughthedangersofalcoholarewellknownandhavebeenwidelypublicized,theremaybeanother【C1】______thatwehaven’t
Someoldpeople____________(愿意住进养老院)becausetheycanenjoybetterlivingenvironmentandhaveprofessionalcareandtreatment.
PreparingforTestsIdeallyitshouldbeloveoflearning,achievement,andself-improvementthatpromptsalllearning.But
A、Theywillbegladtoreturntheirkindness.B、Theywillinvitethemtotheirhousesoon.C、Theyhavehadaveryhappytime.D、
随机试题
按分段责任制规定,多式联运经营人的责任范围以各区段运输原有责任危险认定,如海上区段办理依据是()
女性,52岁,因结节性甲状腺肿接受了甲状腺大部切除术。术中顺利,术后安返病房。护士指导该病人在术后当天进温凉流食的目的是()
A.伊贝母B.麻黄C.杜仲D.牡丹皮E.甘松在新疆维吾尔聚居区维医常用的维药是
C声级由国际标准化组织(ISO)推荐,用作噪声卫生评价的指标。()
房地产投资项目财务评价主要采用盈亏平衡分析法、敏感性分析法和概率分析法等。()
某商业中心地上4层、地下1层,建筑高度20m,耐火等级一级,每层层高均为5m,每层建筑面积均为10000m2,按有关国家工程建设消防技术标准配置了自动喷水灭火系统、火灾自动报警系统等消防设施及器材。某歌舞厅位于该商业中心的地下一层至地上四层,每层歌舞厅的建
货运企业定价的主要方法有()。
编制银行存款余额调节表时,下列未达账项中,会导致企业银行存款日记账的账面余额小于银行对账单余额的有()。
班级组织
设X~b(25,p1),Y~b(25—X,p2),求:EY,DY.
最新回复
(
0
)