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
【F1】When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the sour
【F1】When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the sour
admin
2016-03-22
30
问题
【F1】
When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the source of the affliction and find ways to combat it.
Oftentimes, success is achieved, as medical science is able to isolate the parasite, germ or cell that causes the problem and finds ways to effectively kill or contain it. In the most serious of cases, in which the entire population of a region or country may be at grave risk, it is deemed necessary to protect the entire population through vaccination, so as to safeguard lives and ensure that the disease will not spread.
【F2】
The process of vaccination allows the patient’s body to develop immunity to the virus or disease so that, if it is encountered, one can ward it off naturally.
To accomplish this, a small weak or dead strain of the disease is actually injected into the patient in a controlled environment, so that his body’s immune system can learn to fight the invader properly. Information on how to penetrate the disease’ s defenses is transmitted to all elements of the patient’s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell.【F3】
This makes sure that, should the patient later come into contact with the real problem, his body is well equipped and trained to deal with it, having already done so before.
There are dangers inherent in the process, however.【F4】
On occasion, even the weakened version of the disease contained in the vaccine proves too much for the body to handle, resulting in the immune system succumbing, and, therefore, the patient’s death.
【F5】
Such is the case of the smallpox vaccine, designed to eradicate the smallpox epidemic that nearly wiped out the entire Native American population and killed massive numbers of settlers.
Approximately 1 in 10, 000 people who receives the vaccine contract the smallpox disease from the vaccine itself and dies from it. Thus, if the entire population of the United States were to receive the Smallpox Vaccine today, 3, 000 Americans would be left dead.
Fortunately, the smallpox virus was considered eradicated in the early 1970’s, ending the mandatory vaccination of all babies in America. In the event of a re-introduction of the disease, however, mandatory vaccinations may resume, resulting in more unexpected deaths from vaccination. The process, which is truly a mixed blessing, may indeed hide some hidden curses.
【F2】
选项
答案
接种疫苗是让人体对病毒或疾病产生免疫力。万一碰上病毒或疾病,人体可以自然战胜它。
解析
转载请注明原文地址:https://kaotiyun.com/show/GdsZ777K
0
考研英语一
相关试题推荐
Weareallseeingratherlessofthesun.Scientistslookingatfivedecadesofsunlightmeasurementshavereachedthedisturbin
Newscientificstudiesrevealthehiddencostsofmultitaskingastechnologyincreasinglytemptspeopletodomorethanonethin
There’salotofmoneyinreligion.Lookatthetax-freeincomeofAmericanTVevangelists,oratStPeter’sandallthegoodies
Americansbelievenoonestandsstill.Ifyouarenotmovingahead,youarefallingbehind.Thisattituderesultsinanationof
Scientistshavebegunusingsatellite-basedsystemstopredictvolcaniceruptions.Thisallowsblanketcoverageoftheentirewo
Despiteacoolingoftheeconomy,hightechnologycompaniesarestillcryingoutforskilledworkers.TheInformationTechnology
Newspapersarebecomingmorebalancedbusinesses,withahealthiermixofrevenuesfromreadersandadvertisers.Americanpapers
Newspapersarebecomingmorebalancedbusinesses,withahealthiermixofrevenuesfromreadersandadvertisers.Americanpapers
Whatmakesagreathighschool?Americansthinkalotofthingsdo,fromoutstandingacademicsorasupportiveenvironmentfors
随机试题
Manythingsaboutlanguageareamystery,andmanywillalwaysremainso.Butsomethingswedoknow.First,weknowthata
双链DNA的Tm高是由下列哪组碱基含量高所引起
社区卫生服务的骨干力量是
关于片剂润滑剂作用的说法,错误的是()。
工程施工质量不符合要求时,经返工重做或更换器具、设备的检验批后应()。
自动喷水灭火系统年度检测中,对喷头重点检查喷头选型与保护区域的使用功能、危险性等级等匹配情况,核查闭式喷头玻璃泡色标高于保护区域环境最高温()℃的要求,以及喷头无变形、附着物、悬挂物等影响使用的情况。
1945年抗日战争胜利,中国作为联合国安理会五大常任理事国之一,国际地位显著提高。其原因是()。
真社会性动物是一类具有高度社会化组织的动物,具有繁殖分工(群体中可分为专门进行繁殖的阶级,或是较少、甚至不进行繁殖的阶级)、世代重叠(群体中的成熟个体,可分为两个以上的世代)、合作照顾未成熟体(某一个体会照顾群体中其他个体的后代)的特征。根据上述定义,下
新时期以来逐步形成的对外开放新格局是()
Shell排序、快速排序、堆排序的稳定性如何?(23)。若要尽可能的完成对实数数组的排序,且要求排序是稳定的,则应选(24)。若用插入排序算法对n个记录进行排序,最佳情况下,对关键字进行的比较次数为(25)。对于多关键字而言,(26)是一种方便而又高
最新回复
(
0
)