首页
登录
职称英语
We all have offensive breath at one time or another. In most cases offensive
We all have offensive breath at one time or another. In most cases offensive
游客
2024-09-23
1
管理
问题
We all have offensive breath at one time or another. In most cases offensive breath emanates from bacteria in the mouth, although there are other, more surprising causes.
Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition.
Bad breath can happen whenever the normal flow of saliva slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit smelling gases, the worst of which is hydrogen sulfide.
Mouth bacteria thrive in airless conditions. Oxygen-rich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulfide producing bacteria gains the upper hand, producing classic "morning breath".
Alcohol, hunger, too much talking, breathing through the mouth during exercise—anything that dries the mouth produces bad breath. So can stress, though it’s not understood why. Some people’s breath turns sour every time they go on a job interview.
Saliva flow gradually slows with age; which explains why the elderly have more bad breath trouble than younger people do. Babies, however, who make plenty of saliva and whose mouths contain relatively few bacteria have characteristically sweet breath.
For most of us, file simple, dry-mouth variety of bad breath is easily cured. Eating or drinking starts saliva and sweeps away many of the bacteria. Breakfast often stops morning breath. Those with chronic dry mouth find that it helps to keep gum, hard candy, or a bottle of water or juice around. Brushing the teeth wipes out dry-mouth bad breath because it clears away many of the offending bacteria.
Surprisingly, one thing that rarely works is mouthwash. The liquid can mask bad-breath odor with its own smell, but the effect lasts no more than an hour. Some mouthwashes claim to kill the bacteria responsible for bad breath. The trouble is they don’t necessarily reach all offending germs. Most bacteria are well protected from mouthwash under thick layers of mucus. If the mouthwash contains alcohol—as most do—it can intensify the problem by drying out the mouth. [br] According to the passage, alcohol has something to do with bad breath mainly because______.
选项
A、it keeps offending bacteria from reproducing
B、its smell adds to bad breath
C、it kills some helpful bacteria
D、it affects the normal flow of saliva
答案
D
解析
推理题。文章第五段首句提到Alcohol,hunger…一anything that dries the mouth produces badbreath.由此可知,酒精虽然与口腔异味无关,但酒精可使口腔干燥进而产生口臭。同时根据第三段第一句Bad breath can happen whenever the normal flow of saliva slows.可以推出,酒精影响了唾液的正常流速,故[D]符合文意。
转载请注明原文地址:https://tihaiku.com/zcyy/3769997.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
随机试题
Forthispart,youareallowed30minutestowriteanessay.Supposetherear
患者,男,40岁。素有高血压病史,现眩晕耳鸣,面红头胀,腰膝痠软,失眠多梦,时有
下图示意2015年11月29日14时地面天气形势(单位:百帕)。 即将出现
我国证券投资基金业伴随着证券市场的发展而诞生,其发展线索主要包括( )。 Ⅰ
共用题干 ChildConsultantsThesedays,"what
2012年对华货物进出口额相差最大的国家或地区是()。A、美国 B、欧盟 C
2016年,A市旅游服务价值年值比农林牧渔业总产值年值多:A.494.46亿
下列说法中,对于土地价格的认识正确的是( )。A、土地价格取决于估价师的专业评估
发行人应在招股说明书及其摘要披露后_________日内,将正式印刷的招股说明书
某企业为提高产品附加值,拟建设一套深加工装置,项目计算期6年,其中建设期1年,运
最新回复
(
0
)