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
28
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.
What kind of person is most likely to catch a cold?
选项
A、The person who has a mild fever for a few days.
B、The person who carries viruses capable of producing colds.
C、The person who spends most of his time indoors.
D、The person who spends most of his time outdoors.
答案
C
解析
第二段最后一句提到感冒发生的原因还不清楚;感冒的主要原因可能不是因为严寒的天气,而是由于大部分时间待在室内,增加了与携带感冒病毒的人亲密接触的机率,由此可知,答案为[C]。选项[A]、[B]和[D]均与上下文意思不符。
转载请注明原文地址:https://kaotiyun.com/show/XmXK777K
0
专业英语四级
相关试题推荐
CarsintheFutureAsbigcarscausemanyproblems,/suchaspollution,shortageofparkingspace,crowdedtraffic,/scien
TheChinesefilmsuperstaroncesaidthathewouldrather______rememberedasacommonpersonthanasacelebrity.
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopedacheck-listofstressfulevents.Theyappreciatedt
______beforewedepartthedayaftertomorrow,weshouldhaveawonderfulgather-together.
Languagestyleaffectslong-termrelationshipstrengthandthecompatibilityofexistingandwould-becouples,suggestsanewst
Theserviceoperates36librariesthroughoutthecountry,whilesix______librariesspeciallyservethecountryside.
Whoneedsapublisher?BobYoung,CEOofprint-on-demandserviceLulu,com,saysthatthepublishingand【C1】______ofbooksonlin
WriteonANSWERSHEETTWOanoteofabout50-60wordsbasedonthefollowingsituation:ACollegeEnglishSpeechContestist
Accordingtotheconversation,anexampleof"Christmastrimmings"couldbe______.
TheintroductionofnewvarietiesofriceandwheatinAsiaandLatinAmericahasbeen(1)_____asthe"GreenRevolution."Sofar
随机试题
行政复议作为行政机关纠正错误的一种监督制度,其性质上的特点是()
我国第一部以马克思主义观点阐述教育问题的著作是【】
符合甲状腺功能亢进症代谢率增高的表现是
胎方位的指示点,正确的是
甲与乙签订了一份马的试用买卖合同,试用期间为两个月。乙牵回马后,立即与丙签订了买卖合同。双方约定,马的所有权自合同签订之日起转移给丙,但在丙10日内凑齐马款,交付乙后,才将马交付给丙。至第7日,乙因向丁借款又将该马出质于丁,且将该马交付于丁。至第8日,丙与
落球仪测试土质路基模量时,每个测点最多只能测试3次。()
依《电信条例》规定,颁发《基础电信业务经营许可证》应当按照国家有关规定采用()方式。
下列哪些属于警衔制度的内容?()
J.Martin对信息系统开发的基本出发点之一,是希望计算机化的信息系统应注意和强调【】,特别是可见效益,直接经济效益,否则难以持久。
A、9-17.B、18-26.C、27-35.D、36-45.B从选项可以初步猜测题目与数字范围有关。听完录音,可知对话的主题是一项休闲运动的调查,可进一步猜测本题与调查中的年龄组别有关。根据录音,最积极参与体育运动的是18至26岁的人。故答案是B
最新回复
(
0
)