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
2024-06-10
3
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 sulrue-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 tums sour every time they go no a job interview.
Saliva flow gradually shows 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] Mouthwashes are not an effective cure for bad breath mainly because.
选项
A、they can’t mask the bad odor long enough
B、they can’t get to all the offending bacteria
C、their strong smell mixes with bad breath and makes it worse
D、they can’t cover the thick layers of mucus
答案
B
解析
依据文章第九段第四句The trouble is they don’t necessarily reach all offending germs.麻烦的是他们不能抑制所有有害病毒。可以判断B最符合题意,正确是B。
转载请注明原文地址:https://tihaiku.com/zcyy/3628498.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]W:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
[originaltext]M:Icanhardlybreathe.Wouldyoupleaseputyourcigaretteout?
随机试题
Televisionhaschangedthelifestyleofpeopleineveryindustrialize
Asanxiety-makers,examinationsaresecondtonone.Thatisbecausesomuch
[originaltext]YoucouldsaythatJosephCornellbecameanartistbecauseof
根据室间隔缺损的血液动力学改变,首先引起增大的心腔是A.右心房增大 B.左心室
有关债券当期收益率与到期收益率之间的关系,以下表述正确的是( )。A.当期收益
采用()贮存中药,可以有效地防止不宜烘、晾中药的生虫、发霉、变色等变质现象发生A
急性胰腺炎的发病之初3~4小时,最有诊断价值的是A.尿淀粉酶升高 B.血淀粉酶
在垄断资本主义阶段,占统治地位的资本是( ) A.工业资本 B.银行资本
系统性红斑狼疮的特异性自身抗体,与病情活动性相关的是A.抗Sm抗体 B.AN
炉窑砌筑时,吊挂拱顶锁砖应遵循()。A.不宜锁得太紧 B.整体同时锁紧 C.
最新回复
(
0
)