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
2023-09-14
43
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/3012232.html
相关试题推荐
[audioFiles]audio_eusm_j90_001(20082)[/audioFiles]A、Holdherbreath.B、Nottob
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?
随机试题
TheAmericanfarmershavealwaysbeenindependentandhard-working.Inthe
请以公司销售部经理的名义,给Edward先生拟一份来北京一周的日程安排表。内容主要包括:1.3月6日周二下午5:00飞抵北
[originaltext]W:Soyoumentionedhiking.IthinkSouthAfricamusthavealot
Youshouldspendabout20minutesonQuestions27-40,whicharebasedonReading
Slaverywas______inAmericainthe19thcentury.A、abolishedB、cancelledC、abando
从R港运原油到M港,往返航次运距为25000海里,往返航次港口费用为21400美
以下关于高速以太网的叙述中,()是正确的。A.高速以太网是指速率达到或超过100
患儿女,6个月,2个月前因发热、抽搐3天确诊为化脓性脑膜炎,经治疗症状及体征消失
持股期限超过1年的,股息红利所得()个人所得税。A.暂免征收 B.征收10%
佩兰的功效是A.止咳 B.解暑 C.行气 D.祛湿 E.止呕
最新回复
(
0
)