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
2019-03-12
57
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 plaqu
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
短文中提到,牙斑是牙齿表面一层粘粘的无色层,故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/qZ47777K
0
大学英语四级
相关试题推荐
Globalwarmingisatrendtowardwarmerconditionsaroundtheworld.Partofthewarmingisnatural;wehaveexperienceda20,00
A、over250.B、76.C、500.D、800.A信息明示题。由Morethan250foreigncompaniesincluding76oftheGlobal500willberepresented.可知,25
Keepinghealthyrequiresaconsciouseffort.Youmakechoicesaboutthefoodsyoueat,just【C1】______youmakechoicesaboutgett
A、Physics.B、Paintingandcrafts.C、Businessandtechnicalskills.D、Speech.A信息明示题。短文提到Coursesinproprietaryschoolsnotonly
A、Thetopicisworthdiscussingagain.B、Thetopicisfunnyandmeaningful.C、Thetopicneedstobewellunderstood.D、Thetopic
A、Theybuiltlong-lastingschoolsinTurkey.B、TheyestablishedahugeschoolsysteminTurkey.C、Theyofferedfinancialsupport
A、Frenchwomenhavethelongestmaternityleave.B、Fewcountriesguaranteegenderequalityinconstitutions.C、Afghanistan’scon
A、Genderequality.B、Women’smarriage.C、Genderdiscrimination.D、Paidmaternityleave.A题目询问联合国刚结束的事件的关注点是什么。新闻首句就讲到联合国刚结束关注性别平
A、Peopletendtobeasleeponthetrains.B、Peopleusuallyreadnewspapersthere.C、Theyalwaysleaveandarriveontime.D、Ther
Nooneknowsexactlyhowmanydisabledpeoplethereareintheworld,but【C1】______suggestthefigureisover450million.Then
随机试题
患儿,5岁,便血,新鲜,量不多,位于大便外面,考虑哪种疾病可能性大
8月,李某出版小说一本取得稿酬80000元,从中拿20000元通过国家机关捐赠给受灾地区。李某8月份应缴纳的个人所得税是()。
在指数化的方法中,()适合于证券数目较小的情况。
()是衡量银行资产质量的最重要指标。
下列选项中,和巴甫洛夫提出的高级神经活动类型强、平衡、不灵活(安静型)相对应的是()
关于徇私枉法罪与包庇罪的区别说法正确的有()。
试述交换机的存储转发方式和直通转发方式的优缺点。
Computer______isacomplexconsistingoftwoormoreconnectedcomputingunits,itisusedforthepurposeofdatacommunicati
Peopleplaymusiconit.He/Shetakescareofsickpeople.
A.claimB.advancedC.challengeD.butE.constantlyF.declareG.pilesupH.limitedI.significanceJ.hesitatedK.andL.
最新回复
(
0
)