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
2024-09-23
9
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] The phrase "emanates from" in Paragraph 1 most probably means______.
选项
A、thrives on
B、accounts for
C、originates from
D、descends from
答案
C
解析
语义题。 emanates from的含义可依据第一段第二句中的…offensive breath…emanates frombacteria in the mouth…来理解。原句的含义为:在大多数情况下,口臭来源于口腔中的细菌。[C]意为“来源于……,由……引起/产生”与题意相符,为正确答案。[A]thrives on“兴盛,成功”、[B]accounts for“解释,说明”和[D]descends from“为……的后裔”,均不符合题意,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3769995.html
相关试题推荐
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcases,offensiv
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensive
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
Youcan______yourmusclesmorepowerfullybylinkingupyourbreathingtothe
随机试题
A.abandonedB.assumedC.avoidingD.brieflyE.desiredF.d
HowIwishthatI________EnglishwellwhenIwasincollege!A、hadlearnedB、le
Indoorairpollutioncanthreatenthehealthofcloselyconfinedfarmanimalsan
[originaltext]Asyoupreparetobecomeelementaryschoolteachers,you’llb
欧洲的穴兔于1859年由英国引入澳大利亚,十几年内数量急剧增长,与牛羊竞争牧场,
药学是指A.医药分业和医院药房B.药学科学和药学职业C.药学科学和药事组织D.药
企业采购原材料属于()活动。A.分配 B.资金营运 C.投资
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(
某套商品住宅的建筑面积为100平方米,套内建筑面积为80平方米,套内建筑面积的价
港口与航道工程中,吹填工程中常用的排水口结构形式是( )。A.溢流堰式排水口
最新回复
(
0
)