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
34
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
TheSeriousRisksofRushingNewTeacherEvaluationSystemsA)Oneoftheprimarypolicyreformsnowbeingemployedinstatesand
TheNewBusinessModelsA)Mostemergingcountriesarefondofhighlydiversifiedcompanies.India’sTataGroup,whichaccountsf
LazyMoneyA)There’snoquestionthatprocrastination(拖延)intheworkplaceisaneconomicdrag.Peoplewhostepoutforcoffeeor
Anewstudyshowsthatregularlyeatingfastfoodisn’tjustbadforyourwaistline,itcanalsodamageyourliverinwaysthat
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedrops.Theyfindithardertolearntheirwayarounda
Sendingyourchildrentopianoorviolinlessonsinabid(努力)toboosttheiracademicachievementisawasteofmoney,according
Handwritinghasbecomeadyingart,nowthatkidsstartusingkeyboardsassoonastheybeginschool.Butwritingthingsoutby
Thetermbiologicalclockisappliedtothemeansbywhichlivingthingsadjusttheiractivitypatterns,withoutany【B1】______c
It’seleveno’clockSundaymorning,andyou’vejust【B1】______afteralatenightofpartying.Yougetoutofbedinan【B2】______
随机试题
骨髓位于①___________________和②___________________的间隙中,可分为③___________________和④___________________两种。
空调降温效果不好,压缩机频繁启动断开的原因是什么?怎样排除?
A.夹气B.垂泉C.掠草D.滚蹄E.三江治疗马漏蹄宜选
对诊断小儿营养不良最有诊断价值的病史是
细辛的用量为
在建立工程项目分解结构中,识别项目主要组成部分时应从便于项目实施管理和()等方面考虑。
保管期满但未结清的债权债务原始凭证,经会计主管人员批准后可以销毁。()
梦的离奇古怪又似乎和文艺家们的离奇想象有点相似,文艺家们_________的想象,古今天地万物的无所不包,无奇不有,但是和梦相比,文艺家们似乎也要_________。在梦里,人人都是一个艺术家,白天不能实现的,梦里就能实现;白天不能见到的,梦里就能见到;白
据媒体报道,美国教育部下属机构国家教育统计中心网站2013年3月22日在“每日语录”一栏中引用毛泽东“对自己,‘学而不厌’;对人家,‘诲而不倦”’的名言,国家教育统计中心因此遭到猛烈抨击。有美国参议员出面表示,教育部必须解释为何引用“共产主义者”的话。该中
ItwasadaythatMichaelEisnerwouldundoubtedlyliketoforget.SittinginaLosAngeleswitnessboxforfourhourslastweek
最新回复
(
0
)