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] Mouthwashes are not an effective cure for bad breath mainly because______.
选项
A、they can’t mask the bad odor long enough
B、they can’t get to all the offending bacteria
C、their strong smell mixes with bad breath and makes it worse
D、they can’t cover the thick layers of mucus
答案
B
解析
细节题。文章最后一段倒数第三句The trouble is they don’t necessarily reach all offending germs.即虽然漱口水具有杀死细菌的效用,但它们也无法接触到大多数细菌,故[B]正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3769998.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
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
随机试题
TheSupremeCourtwillhearargumentstodayabouttheuseofpublicmoneyfo
Atwork,asinlife,attractivewomengetalotofthebreaks.Studieshave
甲单位为央级事业单位,执行《事业单位会计制度》并计提固定资产折旧。2015年
在学习“平面向量”后,某数学教师安排了如下一道选择题: 若非零向量a,b
患儿,男,6岁,上呼吸道感染引起发热,医生开具布洛芬悬浮液。 布洛芬混悬液的贮
检查铁盐时,若供试管与对照管的色调不一致,或所呈硫氰酸铁颜色很浅不便于观察比较时
下肢牵引时抬高床脚15°~30°的主要目的是()。A.设置对抗力量 B.减轻
急性心力衰竭患儿的正确护理是A.让患儿头足抬高休息 B.经常给患儿翻身 C.
即使在知识渊博的学者中,也有一些虽然学习刻苦,读书甚众,但能力却不很高,缺乏独立
根据中国证监会的规定,期货公司营业部应当设立信息公示栏,提示投资者可以通过中国期
最新回复
(
0
)