首页
登录
职称英语
(1) We all have offensive breath at one time or another. In most cases offens
(1) We all have offensive breath at one time or another. In most cases offens
游客
2024-09-10
14
管理
问题
(1) 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.
(2) 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.
(3) 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.
(4) 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".
(5) 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.
(6) 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.
(7) 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.
(8) 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 Para. 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的语义来理解。原句的含义为:在大多数情况下,口臭……口腔中的细菌。[C]意为“散发,来自(于)”与文意相符,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”,均不符合文意,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3751632.html
相关试题推荐
(1)Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffens
(1)Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffens
随机试题
(1)WhenWinstonChentoldhisfriendsthathehadquithisjobaschieftech
机器损坏保险的保险责任为()。A.机械事故和自然灾害 B.机械事故和人为事
冬期施工时,油漆中不可随意加入()。A.固化剂 B.稀释剂 C.催干剂
A.2 B.4 C.8 D.16
高速公路隧道某隧道为双洞单向3车道隧道,隧道长度1.5km。地质勘察报告表明大部
()是控制客户产品成本的第一道关口。A.上游厂商资质 B.控制好进货价格
血浆pH降低引起呼吸运动增强,主要是通过刺激( )。A.肺牵张感受器 B.中
为提高浸出效率,采取的措施正确的是A:选择适宜的溶剂 B:升高温度,温度越高越
(2018年真题)适用于各类高血压,也可用于预防治心绞痛的药物是( )A.卡托
工程项目组织计划的内容通常包括()。A.组织关系图 B.角色和职责安排
最新回复
(
0
)