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
2025-04-22
20
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 mouth 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 no 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 mouth wash contains alcohol--as most do--it can intensify the problem by drying out the mouth. [br] The phrase "emanate from" in Paragraph 1 most probably means" ______".
选项
A、thrive on
B、account for
C、originate from
D、descend from
答案
C
解析
原句意思是“大多数情况下,难闻的味道来自口腔内的细菌”。emanate from发源于,来自于,选项C意思符合。
转载请注明原文地址:http://tihaiku.com/zcyy/4048571.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Yoga,theancientpracticeofpostures,breathingandmeditation,isgaining
Yoga,theancientpracticeofpostures,breathingandmeditation,isgaining
Yoga,theancientpracticeofpostures,breathingandmeditation,isgaining
Duntookadeepbreath,thinkingoverwhathadbeensaidandsearchinginhis
Intheworldofshowbusiness,forexample,fameisapttobebreathtakingly____
随机试题
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeani
Thesnowwasnowtwofeetdeep,makingitdifficult,_____,togetthecarout.A
Somewomen______________________(本来在工作中能够有一份不错的收入)insteadofstayinghome,b
I’mnotaconspiracy(阴谋)theoristoranything,butImustadmitthatthose(26
_______安装在湿式报警阀后的报警管路上,是可最大限度减少因水源压力波动或冲
可转换公司债券可以视为普通公司债券与美式看涨期权的混合体,下列说法正确的有(
以下说法错误的是()。A.汇率是资金成本的主要决定因素 B.通货膨胀的测量主
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
下列事业单位会计科目的余额,应在年终结账时结转记入“事业结余”科目的有( )。
某股票组合市值8亿元,β值为0.92。为对冲股票组合的系统性风险。基金经理决定在
最新回复
(
0
)