首页
登录
职称英语
We all have offensive breath at one time or another. In most cases, offensiv
We all have offensive breath at one time or another. In most cases, offensiv
游客
2024-06-10
33
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 evil-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 sulrue-producing bacteria gain 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 tums sour every time they go no a job interview.
Saliva flow gradually shows 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, the 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
文章第三段第一句指出:Bad breath can happen whenever the normal flow of saliva slows...当唾液分泌减慢时就会发生口腔异味。第五段第一句还告诉我们酒精可以口腔干燥,所以我们可以推断酒精会影响唾液的分泌,即D项,正确是D。
转载请注明原文地址:https://tihaiku.com/zcyy/3628497.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
随机试题
[originaltext]Wherearethestamps?(A)Thepostofficeisclosed.(B)Thestamps
Handsomemenandwomenoftenappeartobeblessedwithluckylives.Nowrese
[originaltext]AnInterviewwithanActressInterviewer:
用滚动预算数据作为考核的企业,其出发点是基于预算目标做的不现实。无法正常发挥考核
计算外墙工程量时,外墙的长度应以()为准。A.外墙轴线 B.外墙中心线
学习方式与学习方法之间的关系正确的是( )。A.类似战略与战术的关系 B.学
以下药品配制的试液,最应该保存在聚乙烯塑料瓶中的是A:硫酸 B:硝酸银 C:
根据企业破产法律制度的规定,在人民法院受理破产申请前6个月内,债务人出现破产原因
作业成本法下,产品成本计算的基本程序可以表示为()。A.资源—作业一成本对象
男性,65岁。急性下壁心肌梗死第2天,心电监测示二度Ⅰ型房室传导阻滞,心室率50
最新回复
(
0
)