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
47
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 correct about this passage?
选项
A、Some offensive breath can’t easily be cured.
B、Heavy drinkers are less affected by bad breath.
C、Elderly people are less affected by bad breath.
D、Offensive breath is less affected by alcohol.
答案
A
解析
从文中第五段For most of us,the simple…bad breath is easily cured,可推断,有些offensive breath可能比较难以治愈,选项[A]正确。老年人和爱喝酒的人都很容易有“口臭”,故[B]和[C]两项错误;酒精很容易引起口干,从而产生口臭,所以[D]也是错误的。
转载请注明原文地址:http://tihaiku.com/zcyy/3156811.html
相关试题推荐
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
Sugarlessyoghurtcouldhelpbeatbadbreath,toothdecayandgumdisease,s
随机试题
DinaBorzekowsldmadeastudyofagroupofthird-gradestudentsfromsixAm
Questions28-35Completethenotesbelowusingwordsfromthebox.Writeyouran
MacStiofaindied_________.[originaltext]Theformerleaderoftheso-called
Mostofusthinkofsharksasdangerous,owingtolackofinformationrathertha
[originaltext]Now,listentoPartTwooftheinterview.W:Interesting.So,as
以下有关颗粒剂的叙述错误的是:()。A.保持了汤剂作用迅速的特点B.质量稳定C
交流单芯、分相电缆穿过金属护板时,金属护板不应形成闭合磁路。
“己欲立而立人,己欲达而达人”告诉教师,对待同事和学生要做到( )。A.相互尊
交易成本大小与谈判的复杂程度()。A.呈正相关 B.呈负相关 C.无关 D
有关P/O比值的叙述正确的是A.是指每消耗1mol氧分子所消耗的ATP的摩尔数
最新回复
(
0
)