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
2023-11-24
42
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 (唾液) 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 (硫化物).
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 (黏液). If the mouthwash contains alcohol--as most do-it can intensify the problem by drying out the mouth. [br] We can infer from this passage that ______.
选项
A、offensive breath can’t easily be cured
B、elderly people are less offended by bad breath
C、heavy drinkers are less affected by bad breath
D、offensive breath is less affected by alcohol
答案
A
解析
推理题。根据上一道题,大多数的口臭根源于口腔内的细菌,但要接触到并杀死这些细菌却十分困难,从而推断出此病不易治愈。所以,A项符合文意。选项B老年人很少受到口臭的困扰”与第六段第一句的文意不符,即唾液的流速随着年龄的增长而减缓,因而老年人比青年人更易于受到口臭的困扰;选项C“酗酒者不易受口臭的影响”和选项D“酒精对口臭没有多大影响”的说法不正确,因为在上一个问题中我们已经论证过酒精对口臭有着直接的影响。
转载请注明原文地址:https://tihaiku.com/zcyy/3213855.html
相关试题推荐
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Mac’sclose______tohisbrothermadepeoplemistakethemforoneanother.A、res
随机试题
【说明】假设你是英语培训班的负责人,为培训班写一出广告。【内容】1.培训班位于市中心理想地点;2.教职工体贴入微的关怀;3.有英语角、来访外宾交
BillGateswas20yearsold.SteveJobswas21.WarrenBuffettwas26.Ralph
无穷大电源经感性线路突然发生三相短路,冲击系数的数值变化范围是()。A.(-∞
下列关于平屋顶节能构造做法说法错误的有()。A:高效保温材料节能屋顶保温层选用
液态的路面标线涂料有热熔型路面标线涂料。()
如果一家商业银行的贷款风险分类情况为:正常类贷款62亿元,关注类贷款6亿元,损
下列关于算术平均收益率和几何平均收益率的说法错误的是()A.几何平均收益率运用
近代画家中,最擅长画马的是( )。A、徐悲鸿 B、齐白石 C、张大千 D
在雾霾笼罩,让人忧心忡忡之时,环境保护部派出4个督查组,分赴北京、天津、石家庄、
某男患者,65岁。患胃癌四年,晚期,已失去手术治疗价值。生命垂危。家属再三恳求医
最新回复
(
0
)