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
The bypass operation (心脏搭桥手术)【C1】______ open-heart surgery in which the physician takes a vein from the patient’s leg and【C2】___
The bypass operation (心脏搭桥手术)【C1】______ open-heart surgery in which the physician takes a vein from the patient’s leg and【C2】___
admin
2010-01-15
52
问题
The bypass operation (心脏搭桥手术)【C1】______ open-heart surgery in which the physician takes a vein from the patient’s leg and【C2】______ it near the heart to construct a【C3】______ around the blockage in a clogged artery【C4】______ blood can flow freely by. The operation is performed【C5】______ about 100,000 persons a year in the U.S. and costs【C6】______ $10,000. The procedure is
designed to relieve the pain of angina pectoris (心绞痛)which occurs when the blood supply is【C7】______ and also to【C8】______ the patient more freedom of sustained activity.
In those with advanced heart disease and blockage in several arteries, the bypass operation is considered by most doctors 【C9】______ the 【C10】______ means of prolonging life. 【C11】______ those with a less advanced disease, or when only one artery is involved, the advisability of the procedure is【C12】______ more controversial. The operation doesn’t cure the disease that caused the blocked artery【C13】______ the first place. According to some studies,【C14】______ around half of the patients who have had the bypass to relieve one artery will have another blocked artery within five years and in some cases even within one year.
There is of course a【C15】______ rate in any major operation, which【C16】______ from physician to physician and hospital to hospital. The threat to the patient is greatly increased if he is【C17】______ generally poor condition, very advanced in age, or suffering from some serious or debilitating illness. It is essential that the operation【C18】______ by a skilled surgeon knowledgeable【C19】______ this particular technique and in a hospital with the best possible【C20】______ for his use.
【C18】
选项
A、is performed
B、performed
C、be performed
D、perform
答案
C
解析
考查虚拟形式。在it is essential that...后面的从句中,谓语动词为should+动词原形或是直接跟动词原形。虽然perform也是动词原形,但其语态在这里不符,所以 be performed为最佳选项。
转载请注明原文地址:https://kaotiyun.com/show/uWnK777K
0
专业英语四级
相关试题推荐
Lookingback,itwasnaivetoexpectWikipedia’sjoyridetolastforever.Sinceitsinceptionin2001,theuser-writtenonline
MostofushaveanimageofastandardEnglishinpronunciation,andverycommonlyinGreatBritainthisis"ReceivedPronun
PassageOneWhydoestheauthormentionDuPont’sdiversityprogramsinthesixthparagraph?
Supermarkets,retailersanddrinkscompaniesshouldbeforcedtopaysignificantlymoretowardstherecyclingoftheplasticpa
Thereareseveralpossiblerelationshipsbetweenlanguageandsociety.Oneisthatsocialstructuremayeitherinfluenceordet
It’stimeformetosee______dinner.
ThesymptomsofAlzheimer’sdiseasewerelongdismissedasnormalconsequencesofhumanaging,butinthe1980’sthediseaseca
Thetranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages,fullfacilityinthehandlingofhistarget
Oneofthehobbiesweknowthecavemenhadwas______.
Whenouruniversitylaboratoryboughtthismicroscopeweweregivenaoneyear’s______.
随机试题
COPD患者长期家庭氧疗的指征不包括
加强足三阴、足三阳经脉与心脏联系的是()(2005年第8题;2004年第11题)
葡萄糖与甘油之间的代谢中间产物是
A.刺激点B.扳机点C.敏感点D.触痛点E.疼痛点对某一牙颈部牙质缺损处遇冷热刺激后即感不适即谓
唐律规定,()是指盗窃御用物品,因过误而导致皇帝的人身安全受到威胁等罪行。
学科中心论的代表人物是()。
下列交易和事项中,能引起“资本公积”账户借方发生变动的是()。
在不同的国家,不同的时期,科技管理制度可以不同,可以创新,但有一项制度特别重要并具有普适性:那就是创新主体的泛化,或日创新战略的全民化或人民性。换言之,让每个人都有求变创新之心,让每一个发明不论大小都有展示的机会,应当是构建自主创新大制度、大环境的基本出发
设X=6=6<5,命令?VARTYPE(X)的输出是
Scientiststhink______helpssometreestoconservewaterinwinter.
最新回复
(
0
)