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
The realization that colds can kill has renewed interest in finding vaccines and treatments. The trouble is that the common cold
The realization that colds can kill has renewed interest in finding vaccines and treatments. The trouble is that the common cold
admin
2015-05-24
32
问题
The realization that colds can kill has renewed interest in finding vaccines and treatments. The trouble is that the common cold is caused not by one virus but by hundreds of different ones. This means a vaccine or drug that works against one of these viruses, or one family of viruses, is usually ineffective against all the others.What’s more, because colds are usually somild, if treatments cause even minor side effects they can be worse than the disease. Such treatments will never get approval for general use, which is why most companies instead focus on drugs that relieve symptoms.
Nevertheless, some drugs and vaccines are being developed against the cold viruses most likely to turn nasty. A vaccine against Respiratory Syncytial Virus (RSV), a virus which can cause serious illness in young children and the elderly, is going through clinical trials. It consists of a weakened strain of the virus given as a nasal spray.A treatment for RSV infections, based on RNA.interference, is also in development. However, treatments for specific viruses are useless unless your cold is caused by the virus in question—and doctors have no quick way to work out which virus is to blame for a cold. Systems to do this are under development, mostly based on looking for specific DNA.or RNA.sequences, but none are near to reaching the market.
An alternative approach would be to keep taking drugs that prevent infection throughout the cold season, such as a derivative of the anti-smallpox drug cidofovir which has been shown to combat adenoviruses, viruses that can cause upper respiratory infections. But again, as adenoviruses are only responsible for a few percent of colds, the benefits hardly justify the expense and risk of side effects from remaining on a drug permanently.
Short of everyone on the planet isolating themselves for two or three weeks, so existing cold viruses run out of hosts and die out, it is hard to see how we can ever defeat the common cold. Even then, new cold viruses would evolve in time from animal viruses. Some even question whether it is desirable to try to eliminate colds. "It’s blind speculation," says Joel Weinstock of Tufts University in Boston in the US, "but the common cold may protect us from more serious viruses." An occasional sniffle might be a price worth paying if it keeps our immune defenses primed.
According to Joel Weinstock, it’s impossible and unnecessary to
选项
A、try to get rid of the common cold.
B、produce vaccines to defeat cold.
C、protect us from common cold.
D、protect us from more serious viruses.
答案
A
解析
观点态度题。属于文中人物的观点,从最后一段可以推断出乔尔.温斯托克认为普通感冒也可能给人带来一些益处,原文的“盲目的推断”表明试图消除感冒是不可能的,也是没有必要的,A项正确。
转载请注明原文地址:https://jikaoti.com/ti/VLFRFFFM
0
考研英语一
相关试题推荐
NewBookofEconomics—AnimalSpiritsNotwoeconomiccrisesareidentical.Butthesamequestio
DoesEconomicRecessionandDivorceRatehaveSomethingRelated?"Ah,yes,divorce",RobinWilliamsoncemused,"fromtheL
DoesEconomicRecessionandDivorceRatehaveSomethingRelated?"Ah,yes,divorce",RobinWilliamsoncemused,"fromtheL
Acommonplaceobservationofweatherfluctuatingbetweenasevereheatwaveandafairlycooldaymaybewhatdoomsustoclimat
Youhavevisitedaschoolforchildrenofpeasantworkersandfoundteachingenvironmentthereisverybad.Youwillwritealet
Theworldisundergoingtremendouschanges.Theriseofglobalization,bothaneconomicandculturaltrendthathassweptthroug
Theoriesofsocialcontrolfocusonthestrategiesandtechniqueswhichhelpregulatehumanbehaviorandthusleadtoconformity
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
随机试题
请问以下哪个不是计算机病毒的不良特征
女,24岁未婚,发育良好,至今月经未来潮,无不适,超声示内生殖器发育正常。幼年有肠结核史
2岁男孩,发热、咳嗽、气促2周余,近2天呼吸困难突然加重,咳嗽剧烈,查体精神不振,烦躁不安,面色青紫,右肺叩诊上方呈鼓音,下方呈浊音,呼吸音消失,肝肋下1.0cm。根据病例诊断最大的可能是
下列属于散瞳药的是()。
国家鼓励在新建建筑和既有建筑节能改造中使用新型墙体材料等节能建筑材料和节能设备,安装和使用()系统。
财物是财产、物资的简称,下列属于财物的有()。
某县重工业多,污染企业多,新兴产业低,高科技产业低。问:该县应该如何进行产业布局?
A、 B、 C、 D、 C左边四个图形的线条数均为8条,观察四个选项,A项为7条,B项为7条,C项为8条,D项为6条,故本题正确答案为C。
根据我国民事诉讼法的规定,下列哪一法院对因共同海损而提起的诉讼无管辖权?
某地召开有关《红楼梦》的小型学术研讨会。与会者中,4个是北方人,3个是黑龙江人,1个是贵州人;3个是作家,2个是文学评论家,1个是教授。以上提到的是全体与会者。根据以上陈述,参加该研讨会的最少可能有几人?最多可能有几人?
最新回复
(
0
)