首页
登录
职称英语
Common cold is a viral infection that starts in the upper respiratory tract,
Common cold is a viral infection that starts in the upper respiratory tract,
游客
2023-11-13
49
管理
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. [br] 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://tihaiku.com/zcyy/3183171.html
相关试题推荐
OncehestartstalkingaboutChineseorforeignaffairs,ancientormodern,_____
Incontrasttologic,thereiscommonsense,orstillbetter,theSpiritof
Incontrasttologic,thereiscommonsense,orstillbetter,theSpiritof
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplego
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplego
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplego
Inrecentyears,second-handtransactionhasbeenquitecommon.Inthemarke
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Whyaredivorcessocommonatpresent?[br][originaltext]Agoodmarriage
随机试题
PartyA:ShanghaiInternationalTradeCorporationPartyB:BritishAARBankGro
AcademicResearchandProjectDesignAgoodtopi
Itturnedoutthatgettingfiredfromthatcompany______(对我来说是发生在我身上的最棒的事情).was
ZandraJohnsonisalivingproofthatitisnevertoolatetostartyourown
国际图联的简称是IFLA。()
工程造价的特点有()和兼容性。A.大额性 B.个别性 C.动态性 D.层
【教材变动】根据《公路工程建设项目造价文件管理导则》,属于公路工程实施阶段造价文
猛性龋是() A.短期内多数或全口牙发生急性龋 B.龋坏包括牙面
你上课的时候,学生向你提出了一个你也不知道怎么解答的问题,你准备怎么办?
根据税收征收管理法律制度的规定,纳税人申请税务行政复议的法定期限是()。A.在税
最新回复
(
0
)