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
2015-06-27
29
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/PmXK777K
0
专业英语四级
相关试题推荐
WhichofthefollowingisNOTmentionedinthenews?
"Ican’tpraisehishighefficiency______",Georgesaid,"eventhoughIdon’tlikehimpersonally."
Languagestyleaffectslong-termrelationshipstrengthandthecompatibilityofexistingandwould-becouples,suggestsanewst
Accordingtotheconversation,anexampleof"Christmastrimmings"couldbe______.
Inthisfactorythemachinesarenotregulated______butarejointlycontrolledbyacentralcomputersystem.
Everyyeartelevisionstationsreceivehundredsofcomplaintsabouttheloudnessofadvertisements.However,federalrulesforbi
Ourboss,Mr.Thompson,_____araiseinsalaryforages,butnothinghashappenedyet.
WhathashappenedinGaza?
WhathashappenedtoJoseBono?
随机试题
A.前降支B.对角支C.右冠状动脉D.回旋支E.左冠状动脉主干
关于钩虫的病原学,下列哪项是正确的
在毒理学实验所观察的毒作用类型中:A.系统毒性(器官毒性、全身毒性),致癌作用,致突变作用B.致癌作用,致突变作用C.致突变作用,免疫毒性D.系统毒性(器官毒性、全身毒性),致畸胎作用,免疫毒性E.免疫毒性,致癌作用不可能制订安全限值
一24岁妇女,3个月前曾行引产术,术后不久即出现不规则阴道流血,前日咳嗽,痰中带血,来院就诊。妇科检查:子宫稍增大,质软,双侧附件区无异常发现,x线胸片见双侧肺野外带多个小结节状阴影,其中几个略大,似棉球样,血中hCG为1700KU/L。最可能的诊断是
最能反映贫血的实验室检查指标为
对消费税特点的叙述中,不正确的是()。
甲公司拟建造一栋办公楼,预计工期为2年,有关资料如下:资料一:甲公司于2018年1月1日为该项工程借入专门借款3000万元,借款期限为3年,年利率6%,利息按年支付。资料二:工程建设期间占用了两笔一般借款,具体如下:①2017年12月1日,甲公司向
2014年,万某开了一家网店,专门销售各类知名品牌的鞋服等商品,后经相关品牌的权利人发现并鉴定万某销售的商品均系仿冒其注册商标的产品。在上述案例中,相关知名品牌的权利人不可以:
A.唾液B.龈沟液C.胆汁D.乳汁E.泪液含氟量低于血浆,约为血浆2/3者为()。
Whydoesthewomanpreferseatransportation?
最新回复
(
0
)