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
2023-11-04
28
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 sulfide-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 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, 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] Which of the following is mentioned as one of the causes of bad breath?
选项
A、Toothache.
B、Sulfur-rich food.
C、Mental strain.
D、Too much exercise.
答案
C
解析
文中第三段列举了几个引起offensive breath的原因,如hunger,alcohol等,随后又指出stress也会引起offensive breath,[C]正确。文中只是说运动期间breathing through the mouth(通过嘴巴呼吸)可能引起口臭,并不是说过量运动导致口奥,[D]不正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3156808.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
Troubledbythepersistentlypoorgraduationratesofbasketballandfootbal
[originaltext]Ladiesandgentlemen,sincetheinternationalclubmeetsonlyonc
Inlasttwoyearstheworldhasseenanintensification【M1】______.inthese
1Weareheedlessintheformationofourbeliefs,butfindourselvesfil
AfterreadingthefollowingintroductiontothecourseonFirstCertificateinE
下列现象属于社会心理的有()A.各种民间风俗和传统习惯 B.一个民族长期形成的
根据《民事诉讼法》,证据必须符合()要求。A.真实性、合法性、客观性 B.
下列哪项是热痉挛的发病机制A.缺钙 B.周围血管扩张,循环血量不足 C.体内
当锅炉内的水位高于最高安全水位或低于最低安全水位时,水位警报器就自动发出警报,提
改性沥青的生产过程中,间歇式拌合机宜备有保温性能好的成品储料仓,贮存过程中混合料
最新回复
(
0
)