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
Throughout the world there is a shortage of human organs for transplants. In Britain, for example, 6000 people are waiting for o
Throughout the world there is a shortage of human organs for transplants. In Britain, for example, 6000 people are waiting for o
admin
2011-01-06
82
问题
Throughout the world there is a shortage of human organs for transplants. In Britain, for example, 6000 people are waiting for organs ——5000 for kidneys, and the (51) for hearts, lungs and livers. (52) , only about 1750 kidney, 500 heart and lung, and 650 liver transplants are (53) each year. And the waiting (54) increases at five percent a year. In the United States only half of the 30000 in need of organs (55) them.
Hence the great interest in animal-to-human transplants, known as xenografts or xenotransplants (from the Greek work xenos, meaning strange of foreign) (56) most scientists believe is the only long-term solution to the organ (57) . There have been attempts at xenotransplants (58) the beginning of this century but neither has been successful; the longest (59) was a 20-day-old baby called Fae, who in 1984 was (60) the heart of a baboon.
The main (61) with any organ transplant is that the immune system of the patient receiving the organ sees the transplant organ (62) an invader. The immune system therefore launches a massive attack on the invader, activating enzymes knows as complement, which attack the (63) body, eventually killing the patient as well. This rejection has been (64) when transplanting human organs between humans by the close matching of tissue and the long-term use of drugs known as immuno-suppressants, first introduced just over ten years ago. With xenotranplants, however, rejection is even more (65) ; a normal pig’s heart, for example, transfuses with human blood can be destroyed in 15 minutes.
选项
A、what
B、which
C、that
D、since
答案
B
解析
which引导一个非限制性定语从句修饰animal-to-human transplants。注意:that不引导非限制性定语从句。
转载请注明原文地址:https://kaotiyun.com/show/Pomd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Earlyonemorning,morethanahundredyearsago,anAmericaninventorcalledEliasHowefinallyfellasleep.【R1】______Butheha
1.Forsomeyears,therehasbeenaplantosolvethewatershortageproblembymovinghugeicebergshalfwayroundtheworld—f
Peoplewhoareusedtotakingdrugsormedicinewhentheyareill,orwhoexpecttohaveanoperationinahospital,findtheid
Peoplewhoareusedtotakingdrugsormedicinewhentheyareill,orwhoexpecttohaveanoperationinahospital,findtheid
Peoplewhoareusedtotakingdrugsormedicinewhentheyareill,orwhoexpecttohaveanoperationinahospital,findtheid
Whatdowethinkofwhenweheartheword"business"?Someofusthinkofourjogs,othersofthemerchantstheydealwithasco
ThecathasprobablybeenassociatedwithMansinceitwasfirstgivenaplacebyhisfireinreturnforkeepingthecavedwelli
Readthefollowingpassageandanswerquestions9-18.1.Whenoneofyourcartiresgoesflat,therearetwothingsyoucando.
Readthefollowingpassageandanswerquestions9-18.1.FromDr.R.S.ScorerofBritain’sImperialCollegeoftheSciencecomes
Whatisthewritertryingtodeinthetext?CustomerschooseMrBirdbecausehisshoes
随机试题
Myfather’sreactiontothebankbuildingat43rdStreetandFifthAvenueinNewYorkcitywasimmediateanddefinite:"Youwon’
患者男,48岁。无原因出现上腹剧烈疼痛,伴恶心呕吐,腹肌紧张,出冷汗,休克,此时处理不当的是()。
与镍铬合金相比,铸造金-铂-钯合金的特点是
A.腺癌B.鳞癌C.未分化癌D.肉瘤E.泡状核细胞癌上颌窦癌最常见的病理类型为
虚喘的治疗要点是
下列哪项指标阳性表明传染性大
小王开车顺风速度与逆风速度比为3:2,小王从A地到B地往返共用了50分钟,已知AB两地相距20千米,假设小王开车速度和风速都不变,求风速是多少?()
管道的最小覆土厚度决定于()因素要求。
下列句子中,标点符号使用有误的一项是()。依次填入上面横线处的词语,最恰当的一组是()。
文化是民族的血脉,是人们的“精神家园”,而古迹遗址无异于维系“血脉”和“精神家园”的基因。保护古迹遗址何必囿于“一日”呢?一些破坏古迹遗址的行为不受时间限制。因此,保护古迹遗址必须全天候、常态化。否则,仍不能阻止一些古迹遗址遭到破坏。在保护古迹遗址问题上,
最新回复
(
0
)