首页
登录
职称英语
We all have offensive breath at one time or another. In most cases offensi
We all have offensive breath at one time or another. In most cases offensi
游客
2023-11-19
24
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 had 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] Which of the following is mentioned as one of the causes of bad breath?
选项
A、Tooth trouble.
B、Sulfur-rich food.
C、Too much exercise.
D、Mental strain.
答案
D
解析
细节判断题。可在第五段中找到本题答案,So can stress…意为:除了酒精、饥饿、运动时用嘴呼吸及过多谈话外,精神紧张也同样能产生口臭。所以D选项是正确的。而选项A“牙疼”、选项B“富含硫磺的食物”文章未提到;选项C“运动过量”与文章中提到的运动时用嘴呼吸能产生口干不符,这三项均可排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3201606.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensi
Jim’sclose______tohisbrothermadepeoplemistakethemforoneanother.A、acc
Steven’sclose______tohisbrothermadepeoplemistakethemforoneanother.A、
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
随机试题
()商务英语()外语[br]()会计()保险公司N、D
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
小儿迁延性腹泻的病程是()A.1周以内 B.半年以上 C.2个月以上
醛固酮可促进肾小管A. B. C.水重吸收减少 D. E.
下列细菌中属于条件致病菌的是A.伤寒杆菌B.霍乱弧菌C.金黄色葡萄球菌D.铜绿假
地形图可以进行修测,但修测的面积超过原图总面积()时,应重新进行测绘。A:1/5
肾病综合征的临床表现不包括( )。A.高度水肿 B.血脂低 C.高血压
“三个代表”重要思想是在科学判断党的历史方位和总结历史经验的基础上提出来的,要做
下列不属于合作机构风险分析的是()。A.合作机构的信用状况
男性,60岁。左上肢摔伤,急诊来院。X线摄片显示肱骨干横行骨折,并有移位,经手法
最新回复
(
0
)