首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Food particles. B、Gum disease. C、Unhealthy living habits. D、Chemical erosion. B
A、Food particles. B、Gum disease. C、Unhealthy living habits. D、Chemical erosion. B
admin
2017-02-10
22
问题
Take care of your teeth and your teeth will take care of you. Your teeth are a living part of your body. They have nerves and blood vessels. Diseased teeth can cause pain, die and fall out. Plaque is the main enemy of healthy teeth. Everyone has plaque. It is a sticky, colorless film that coats the teeth. Plaque is always forming on the teeth, especially at the gum line. If plaque is not removed, it builds up and gets under the gum line. Plaque that is left on the teeth for some time hardens. The result is tooth decay and gum disease. The bacteria in plaque live on sugar. They change sugar into acids, which break down the tooth’s harder outer covring. If left untreated, decay goes deeper and deeper into the tooth. After a while, the decay reaches the nerves and blood vessels of the inner tooth. By the time this happens, the tooth has probably started to ache. In addition to tooth decay, there are also gum diseases to watch out for. The bacteria in plaque make poisons that attack the gums. Small pockets form around the teeth. The pockets trap more bacteria and food particles. Finally, the bone supporting the teeth is attacked and starts to shrink. Teeth become loose and may fall out. Adults lose most teeth this way. Keep your mouth healthy! When you brush your teeth, do a good job.
22. What does the speaker say about our teeth ?
23. What does the speaker say about plaque?
24. Why is sugar harmful to teeth?
25. What causes adults to lose most of their teeth according to the speaker?
选项
A、Food particles.
B、Gum disease.
C、Unhealthy living habits.
D、Chemical erosion.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/qLi7777K
0
大学英语四级
相关试题推荐
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.Butburyingone’snoseinabookhasalwaysbeensomewha
TheNewBusinessModelsA)Mostemergingcountriesarefondofhighlydiversifiedcompanies.India’sTataGroup,whichaccountsf
TheRedistributionofHopeA)"HOPE"isoneofthemostoverusedwordsinpubliclife,uptherewith"change".Yetitmatterseno
USimportpricesrecordedthebiggestdropinfivemonthsinNovemberasfoodandfuelcoststumbled(下跌),keepinginflationpres
Wedidn’tworrymuchaboutkeepingfit100yearsago.Asizeablepercentageoftheworld’spopulationwasreapingandsowing,he
Sendingyourchildrentopianoorviolinlessonsinabid(努力)toboosttheiracademicachievementisawasteofmoney,according
A、He’shappythathisparentsarecoming.B、He’sthinkingaboutalotofthings.C、He’snotfeelingverywell.D、He’slookingfo
Morethanacenturyafteritsdiscovery,Alzheimer’sdisease(老年痴呆症)isstilldestroyingpeople’sbrains.Buttheresearchmayoff
A、Aflatwithtwobedrooms.B、Anunfurnishedapartment.C、Awell-decoratedapartment.D、Afurnishedbedroominasharedflat.D
A、Theyhadtobegforfoodaftertheharvest.B、Theygrewwheatandcomonasmallfarm.C、Theysharedasmallflatwiththeirr
随机试题
灭火剂种类很多,目前国内外使用的主要灭火剂是()。
不属于儿童心理疾病的是
患者,女,46岁。入院时诊断:高血压病合并2型糖尿病。责任护士为其提供膳食指南,指导她逐步采纳科学合理的饮食计划。护士实施的是
交易情况包括交易税费的负担方式,有无隐价瞒价、急卖急买、人为哄抬、亲友间的交易等特殊交易情况。()
工程咨询单位发生()情况的,应向原资格认定单位申请办理工程咨询资格变更或终止的手续。
财务会计核算的信息质量特征具体包括()等。
国内家电企业宏浩集团在2016年5月宣布,将斥资45亿美元收购发达国家G国工业机器人制造商K公司。K公司是该国市场上领先的专注于工业制造流程数字化的企业,其研发的机器人已经被用来装配轿车和飞机。宏浩集团收购K公司的动机是()。(2017年)
下列属于第二信号系统的条件反射的是()。
"Ofalltheginjointsinallthetownsinalltheworld,shewalksintomine."It’saclassicquotefromthefilmCasablanca,b
HealthclubcustomerresearchExampleName:DanielTaylorOccupation:【L1】________Agegroup:
最新回复
(
0
)