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
2023-11-03
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 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] According to the passage, alcohol has something to do with bad breath mainly because______.
选项
A、it keeps offending bacteria from reproducing
B、its smell adds to bad breath
C、it kills some helpful bacteria
D、it affects the normal flow of saliva
答案
D
解析
推理题。文章第五段首句提到Alcohol,hunger…一anything that dries the mouth produces badbreath.由此可知,酒精虽然与口腔异味无关,但酒精可使口腔干燥进而产生口臭。同时根据第三段第一句Bad breath can happen whenever the normal flow of saliva slows.可以推出,酒精影响了唾液的正常流速,故[D]符合文意。
转载请注明原文地址:http://tihaiku.com/zcyy/3155429.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
随机试题
Shanghai-InsiderTips(情报系统)Airports
Accordingtoarecentstudy,theideaofagingmightlookdifferentthrought
室外受雨淋的钢筋混凝土构件如出现裂缝时,下列何者是正确的?()A.不允许
以下关于艾滋病的叙述,不正确的是A.是人类免疫缺陷病毒引起的 B.即获得性免疫
以下属于技术分析的基本假设的是( )。 Ⅰ.市场行为涵盖一切信息 Ⅱ.证券
免疫小鼠脾细胞采取时的免疫途径多为A.皮下多点注射B.静脉注射C.肌内注射D.腹
某企业上年末资产负债表部分项目的余额如下:货币资金230,000元,应收账款
“________________”,品牌也同样如此。只有那些久经考验的产品才能
下列建设用地使用权处置方式中,不属于建设用地使用权转让的是()。A.抵押 B.
对于35kV架空线海拔高度为1000m及以上的地区,海拔高度每增高100m,内部
最新回复
(
0
)