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
When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the source o
When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the source o
admin
2017-06-30
64
问题
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.
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. 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. 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. 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 1970s, ending the mandatory vaccination of all babies in America. In the event of a reintroduction 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.
The purpose of the author in writing this passage is______.
选项
A、to comment and criticize
B、to demonstrate and argue
C、to interest and entertain
D、to explain and inform
答案
D
解析
目的题。通读全文,可知作者对这篇文章的语气是客观的,因此选项D“为了解释和告知信息”为正确选项。本文是说明文,选项A“评论和批判”,这是议论文、评论文的模式。选项B“论证和辩论”是议论文的模式。选项C“为了带来兴趣和娱乐”,但这篇文章是科普性的文章。
转载请注明原文地址:https://kaotiyun.com/show/M0FO777K
0
考博英语
相关试题推荐
Thisisanalarmingrealizationasnaturalresourcesandtheenvironmentarebeingdegradedand____atarecordpace.
Petroleumproducts,suchasgasoline,kerosine,homeheatingoil,residualfueloil,andlubricatingoils,comefromonesource-crude
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehumans,plantscanhavethei
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehumans,plantscanhavethei
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehumans,plantscanhavethei
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescientistshadgoodnewstoreport;Thedamageanddeath
随机试题
奥氏体不锈钢埋弧焊选用焊丝时,首先考虑焊丝成分和母材成分接近,由于焊接过程中要烧损,焊丝中()含量应多于母材。
全身浸浴疗法,正确的是
女性,40岁,已婚,经产妇,月经期延长,量多,痛经明显,子宫孕50天大小,有压痛,双附件正常,最可能的诊断为
人民代表大会代表,由人民选举产生,对人民负责,下述关于我国人大代表罢免和辞职程序,正确的是:()
海运提单日期应理解为()。
下列代理行为中,属于滥用代理权的有()。
儿童的现有水平与经过其他人帮助可以达到的较高水平之间的差距叫最近发展区。()
否定教育的等级化、特权化和专制化的教育特征是()。
Withitsrecession-friendlycoffeeprices,plentifultablesandavailablebathrooms,McDonald’srestaurantsalloverthecountry
下列关于栈的描述正确的是()。
最新回复
(
0
)