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
19
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、Therefore
B、However
C、So
D、otherwise
答案
B
解析
however起转折作用。
转载请注明原文地址:https://kaotiyun.com/show/Romd777K
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
1.Forsomeyears,therehasbeenaplantosolvethewatershortageproblembymovinghugeicebergshalfwayroundtheworld—f
1.Thefilmisnotwithoutitsdrawbacks.Disappointment,failure,selfdoubt,regretsoveropportunities,missedormisusedthe
Ifyouintendusinghumorinyourtalktomakepeoplesmile,youmustknowhowtoidentifysharedexperiencesandproblems.Your
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemforthemostofthemisunderstandings
Readthefollowingpassageandanswerquestions9-18.1.Whenoneofyourcartiresgoesflat,therearetwothingsyoucando.
Readthefollowingpassageandanswerquestions9-18.1.FromDr.R.S.ScorerofBritain’sImperialCollegeoftheSciencecomes
IDCardForanewstudent,theIDcardwillbemailedtohis/hermailingaddressapproximately【L5】______workingdaysafterh
ObesityObesityreferstothemedicalconditioncharacterizedbystorageofexcessbodyfat.Thehumanbodynaturallystoresfat
Whenvisitingmuseumsnowadays,peoplecantakepartinmanyactivities.NewYork’sAmericanMuseumofNaturalHistoryisopene
NaturalHealthCareNaturalhealthcareisaphilosophyandasetofprinciplesandpracticesbasedonsciencethatleadtoane
随机试题
公司采用固定或稳定增长股利政策发放股利的意义表现为()
下列词语中加下划线的字,读音全部正确的一组是()
患儿女性,10个月,汉族,因“间断抽搐3周”就诊。发作时突然点头、尖叫,双下肢屈曲,双上肢外展,每次发作持续1~2秒,间隔20秒至2分钟发作1次,如此成串发作,每串5~15下。近3天烦躁易哭,反应稍迟钝。患儿系第一胎,足月顺产,2个月会抬头,5个月会翻身,
未报批建设项目环境影响报告书、环境影响报告表或者环境影响登记表的擅自开工建设的,责令停止建设,可以处()以下的罚款。
“恍然如入汴京,置身流水游龙间,但少尘土扑面耳”。这句话描述的美术作品是()。
试述运用观察法研究幼儿心理时应注意哪些问题。
掌握事物度的重要性在于()
描述数据流程图中基本处理的图表工具有______图、判定表、判别树等。
First-timedogownersmayencounter(遇到)manyproblemsgettingtoknowandtraintheirbets.Sometimesapuppy(小狗),orevenan
InfeudalEurope,urbanareasdevelopedfromclustersofhouseswherepeasantslivedandcommutedtofarmlandsinthecountrysid
最新回复
(
0
)