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
25
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] We can infer from the 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。根据前文可知,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]符合文意,故为正确答案。[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,因而老年人比年轻人更易受到口臭的困扰,故排除;[C]“酗酒者不易受口臭的影响”和[D]“酒精对口臭没有多大影响”的说法均不正确,根据文意可知,酒精会影响唾液的正常流速而导致口臭,故均排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3769999.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
"TheLostGeneration"whichGertrudeSteinusedtodescribesuchwritersasDos
[originaltext]W:Hey,Taxi!Ah,greatThanksforpullingover.M:Whereto?W:
A.生理盐水灌肠 B.肥皂水灌肠 C.两者均可用 D.两者均不可用糖尿病昏
“四风”问题的形成是一个长期的过程,具有反复性和顽固性,其背后是________
某运输企业于2016年年初投资3000万元购买一台设备,预计使用期限为10年,年
下列指标中与巨幼细胞性贫血无关的是A:细胞核的发育落后于胞质B:MCV110~
女性,30岁。左腰部撞伤3小时。患者诉左侧腰痛,有压痛,未及肿块.生命体征稳定。
患者,女,60岁,口腔干燥、无泪、双眼异物感1年余。两侧腮腺区有反复肿胀史。检查
两瓶不同种类的气体,分子平均平动动能相等,但气体密度不同,则()。A.温
在某工程双代号网络计划中,工作N的最早开始时间和最迟开始时间分别为第20天和第2
最新回复
(
0
)