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
Common cold is a viral infection that starts in the upper respiratory tract, sometimes spreads to the lower structures, and may
Common cold is a viral infection that starts in the upper respiratory tract, sometimes spreads to the lower structures, and may
admin
2013-06-03
86
问题
Common cold is a viral infection that starts in the upper respiratory tract, sometimes spreads to the lower structures, and may contribute secondary infections in the eyes or middle ears. The main differences between the common cold and other respiratory infections are the absence of fever and the relative mildness of the symptoms.
About 200 different strains of virus are capable of producing colds. Frequently two or more different viruses can be isolated during a single episode. The cold is spread by person-to-person contact. People can carry the virus and communicate it without themselves experiencing any of the symptoms. Incubation is short — usually one to four days. The viruses start spreading from an infected person before the symptoms appear, and the spread reaches its peak during the symptomatic phase. The incidence of colds peaks during the autumn, and minor epidemics commonly occur throughout the winter. The reason for this incidence is unknown; it may not stem mainly from stresses imposed by chilly weather but rather result from the greater amount of time spent indoors, which increases the likelihood of close contact with those persons carrying cold viruses.
Pathologic changes occurring in the mucous membrane that lines the nose, the nasal sinuses, the nasoharynx, and other upper respiratory passages may include tissue swelling, congestion of blood, and oozing of fluids. During the acute phase of the disease, the respiratory secretions are altered by increase in serum proteins. Parts of cells may also be found in the fluids. Tissue repair is rapid and seems complete, although a relationship might exist between colds and more serious respiratory conditions.
Cold symptoms vary from person to person, but in the individual the same symptoms tend to recur in succeeding bouts of infection. Manifestations may include sneezing, headaches, fatigue, chilling, sore throat, inflammation of the nose (rhinitis;, and nasal discharge. There is usually no fever. The symptoms usually last for only a few days. The nasal discharge is the first warning. The secretions become watery, clear, and excessive. Later, they thicken, increase in mucus and pus content, and may colour a yellow-green, with traces of blood. Coughing can be dry or produce amounts of mucus. Other more serious diseases with similar general symptoms may be mistaken for a cold; some of these are tuberculosis, bronchitis, lung abscesses, and inflammation around the heart.
Treatment is, in most instances, directed toward allaying of symptoms, coupled with rest and adequate fluid intake. Occasionally antibiotics are given to prevent secondary infections.
According to this passage, common cold is
选项
A、a hereditary disease.
B、generally accompanied with mild fever.
C、a kind of popular respiratory infection.
D、caused by spending a lot of time outdoors in chilly weather.
答案
C
解析
根据第一段第一句“普通感冒从上呼吸道开始,是一种病毒性感染…”可知答案为[C]。根据第二段第三句“感冒通过人与人的接触而传播”可知,[A]“遗传疾病”表述不正确;由文中第四段第三句There is usually no fever(感冒一般没有发烧症状)可知[B]表述不正确;第二段倒数第一句中提到冬天感冒可能不是因为严寒的天气,而是由于大部分时间待在室内引起的,因此[D]表述不正确。
转载请注明原文地址:https://kaotiyun.com/show/sVQK777K
0
专业英语四级
相关试题推荐
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】____.theturnofthecenturywhenjazzwasborn,Ameri
Theestimatesofthenumbersofhome-schooledchildrenvarywidely.TheU.S.DepartmentofEducationestimatesthereare250,000
Myadviceis:onlywearsuchclothes_____reallynecessary.
Thetranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages,full【C1】_____inthehandlingofhistarge
Thisisthe12thbookofpoemsinabout50yearsofwritingbyagreatNorthernIrishpoetwhoisnowinhiseighthdecade,and
Onlinesocialnetworksaremassivelyinfluential,yetweunderstandverylittleabouttheimpacttheyhaveonourbrains.Recent
Intheend,itgotabittedious,queuingtoseethemillionaire.Asbefittedourcolour,marshalswavedusthroughtheouterga
Manynewspapersprintedthegovernor’sstatement______wouldsupportataxcut.
Theneedtogotocollegeisrealized,______offersopportunitiesforbettercareers.
Althoughmostpeoplereturnfrompackageholidaysreasonablysatisfied,thist,notalwaysthe【C1】______TakeforInstance,th
随机试题
根据《社会团体登记管理条例》,下列关于成立社会团体所需最低会员数的说法,正确的是()。
All()isacontinuoussupplyoffuel.
A.附子理中丸B.济生肾气丸C.都气丸D.左归丸E.右归丸治疗虚劳脾阳虚证,应首选
会计以()为主要计量单位。
下列商品进出口须事先申领精神药品进出口准许证的是:
[2015]下列有关特别风险的说法中,正确的是()。
已知=1,则导数f′(x0)等于().
根据下面资料回答以下问题:在2007年1~2月份全国居民食品类消费价格指数中,与上年同期相比,降幅最大和增幅最大的分别是()和()。
一般来说,人们认为,在人生变故和逆境面前,善于表达和倾诉是最健康的应对方式,而压抑自己的情绪则被认为是病态的表现。所以,每当有灾难发生,经常有心理专家跑到现场,为幸存者提供所谓“紧急事件应激晤谈”。他们要求幸存者回忆灾难发生的经过
1.在考生文件夹中,存有文档WT9.DOC,其内容如下:[文档开始]新能源技术有太阳能技术、生物能技术、潮汐能技术、地热能技术、风能技术、氢能技术和受控热核聚变技术等多种。新能源技术有太阳能技术、生物能技术、潮汐能技术、地热能技术
最新回复
(
0
)