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、It has to be removed in time by a dentist. B、It is a rare oral disease among old people. C、It contains many nerves and blood v
A、It has to be removed in time by a dentist. B、It is a rare oral disease among old people. C、It contains many nerves and blood v
admin
2017-02-10
72
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、It has to be removed in time by a dentist.
B、It is a rare oral disease among old people.
C、It contains many nerves and blood vessels.
D、It is a sticky and colorless film on the teeth.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/eLi7777K
0
大学英语四级
相关试题推荐
TheSeriousRisksofRushingNewTeacherEvaluationSystemsA)Oneoftheprimarypolicyreformsnowbeingemployedinstatesand
TheNewBusinessModelsA)Mostemergingcountriesarefondofhighlydiversifiedcompanies.India’sTataGroup,whichaccountsf
From2004to2010,Irecorded2620rainfall-inducedlandslidesworldwidethatkilledmorethan32000people.Thetotalnumber
A、He’shappythathisparentsarecoming.B、He’sthinkingaboutalotofthings.C、He’snotfeelingverywell.D、He’slookingfo
Obtaininggoodhealthinsuranceisarealnecessitywhileyouarestudyingoverseas.It【B1】______minorandmajormedicalexpens
Obtaininggoodhealthinsuranceisarealnecessitywhileyouarestudyingoverseas.It【B1】______minorandmajormedicalexpens
A、Ashopassistant.B、Alibrarian.C、Asecretary.D、Ateacher.B女士话里包含了关键特征词book,thereserveroom,thereservelibrarian,inthel
A、Herclassmate.B、Herteacher.C、Herboss.D、Hercolleague.B女士错过了男士对本周部分实验作业的讲解,想当面向男士请教,男士表示女士下午可以到他的办公室找他。故选B。
CreativeCapitalismA)ThemainbuildingonDisney’sstudiolothassevenhugereplicas(复制品)ofSnowWhite’sdwarfsholdingupits
A、Tomakepreparationsforanewpublication.B、Tolearnhowcouplesspendtheirweekends.C、Toknowhowhouseworkisshared.D、
随机试题
简述售后服务的意义。
不同类型的癫痫,预后差异很大,可见下面哪些情况
两侧髂嵴最高点的连线平对
下列需要征收资源税的物品是()。
竞争的主要内容是()。
甲上市公司(以下简称“甲公司”)于2006年4月1日在上海证券交易所上市。截至2012年12月31日,其股本总额为8000万股。2013年6月15日,债权人A公司以甲公司不能清偿到期债务为由向人民法院提出破产清算申请。甲公司对A公司的债权并无异议,但对A公
直线L1:的关系是()。
单位有人反映吃了食堂的东西后身体不舒服,假如你是食堂负责人,此时该怎么办?
Inordertoworkheretheforeignerneedsaworkpermit,whichmustbeappliedforbyhisprospectiveemployer.Theproblemhere
AthevolunteersdoBbecauseshedoesnothaveaweightproblemCbecausethelifetherecanbeveryboringDmakepeopleovere
最新回复
(
0
)